SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl4965-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-4965.h"
  49 #include "iwl-helpers.h"
  50
  51 #ifdef CONFIG_IWL4965_DEBUG
  52 u32 iwl4965_debug_level;
  53 #endif
  54
  55 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
  56                                   struct iwl4965_tx_queue *txq);
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /* module parameters */
  65 static int iwl4965_param_disable_hw_scan; /* def: 0 = use 4965's h/w scan */
  66 static int iwl4965_param_debug;    /* def: 0 = minimal debug log messages */
  67 static int iwl4965_param_disable;  /* def: enable radio */
  68 static int iwl4965_param_antenna;  /* def: 0 = both antennas (use diversity) */
  69 int iwl4965_param_hwcrypto;        /* def: using software encryption */
  70 static int iwl4965_param_qos_enable = 1; /* def: 1 = use quality of service */
  71 int iwl4965_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 16 Tx queues */
  72 int iwl4965_param_amsdu_size_8K;   /* def: enable 8K amsdu size */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  80
  81 #ifdef CONFIG_IWL4965_DEBUG
  82 #define VD "d"
  83 #else
  84 #define VD
  85 #endif
  86
  87 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  88 #define VS "s"
  89 #else
  90 #define VS
  91 #endif
  92
  93 #define IWLWIFI_VERSION "1.2.23k" VD VS
  94 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
  95 #define DRV_VERSION     IWLWIFI_VERSION
  96
  97 /* Change firmware file name, using "-" and incrementing number,
  98  *   *only* when uCode interface or architecture changes so that it
  99  *   is not compatible with earlier drivers.
 100  * This number will also appear in << 8 position of 1st dword of uCode file */
 101 #define IWL4965_UCODE_API "-1"
 102
 103 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 104 MODULE_VERSION(DRV_VERSION);
 105 MODULE_AUTHOR(DRV_COPYRIGHT);
 106 MODULE_LICENSE("GPL");
 107
 108 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 109 {
 110         u16 fc = le16_to_cpu(hdr->frame_control);
 111         int hdr_len = ieee80211_get_hdrlen(fc);
 112
 113         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 114                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 115         return NULL;
 116 }
 117
 118 static const struct ieee80211_hw_mode *iwl4965_get_hw_mode(
 119                 struct iwl4965_priv *priv, int mode)
 120 {
 121         int i;
 122
 123         for (i = 0; i < 3; i++)
 124                 if (priv->modes[i].mode == mode)
 125                         return &priv->modes[i];
 126
 127         return NULL;
 128 }
 129
 130 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 131 {
 132         /* Single white space is for Linksys APs */
 133         if (essid_len == 1 && essid[0] == ' ')
 134                 return 1;
 135
 136         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 137         while (essid_len) {
 138                 essid_len--;
 139                 if (essid[essid_len] != '\0')
 140                         return 0;
 141         }
 142
 143         return 1;
 144 }
 145
 146 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 147 {
 148         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 149         const char *s = essid;
 150         char *d = escaped;
 151
 152         if (iwl4965_is_empty_essid(essid, essid_len)) {
 153                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 154                 return escaped;
 155         }
 156
 157         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 158         while (essid_len--) {
 159                 if (*s == '\0') {
 160                         *d++ = '\\';
 161                         *d++ = '0';
 162                         s++;
 163                 } else
 164                         *d++ = *s++;
 165         }
 166         *d = '\0';
 167         return escaped;
 168 }
 169
 170 static void iwl4965_print_hex_dump(int level, void *p, u32 len)
 171 {
 172 #ifdef CONFIG_IWL4965_DEBUG
 173         if (!(iwl4965_debug_level & level))
 174                 return;
 175
 176         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 177                         p, len, 1);
 178 #endif
 179 }
 180
 181 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 182  * DMA services
 183  *
 184  * Theory of operation
 185  *
 186  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 187  * of buffer descriptors, each of which points to one or more data buffers for
 188  * the device to read from or fill.  Driver and device exchange status of each
 189  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 190  * entries in each circular buffer, to protect against confusing empty and full
 191  * queue states.
 192  *
 193  * The device reads or writes the data in the queues via the device's several
 194  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 195  *
 196  * For Tx queue, there are low mark and high mark limits. If, after queuing
 197  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 198  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 199  * Tx queue resumed.
 200  *
 201  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 202  * queue (#4) for sending commands to the device firmware, and 15 other
 203  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 204  *
 205  * See more detailed info in iwl-4965-hw.h.
 206  ***************************************************/
 207
 208 static int iwl4965_queue_space(const struct iwl4965_queue *q)
 209 {
 210         int s = q->read_ptr - q->write_ptr;
 211
 212         if (q->read_ptr > q->write_ptr)
 213                 s -= q->n_bd;
 214
 215         if (s <= 0)
 216                 s += q->n_window;
 217         /* keep some reserve to not confuse empty and full situations */
 218         s -= 2;
 219         if (s < 0)
 220                 s = 0;
 221         return s;
 222 }
 223
 224 /**
 225  * iwl4965_queue_inc_wrap - increment queue index, wrap back to beginning
 226  * @index -- current index
 227  * @n_bd -- total number of entries in queue (must be power of 2)
 228  */
 229 static inline int iwl4965_queue_inc_wrap(int index, int n_bd)
 230 {
 231         return ++index & (n_bd - 1);
 232 }
 233
 234 /**
 235  * iwl4965_queue_dec_wrap - decrement queue index, wrap back to end
 236  * @index -- current index
 237  * @n_bd -- total number of entries in queue (must be power of 2)
 238  */
 239 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
 240 {
 241         return --index & (n_bd - 1);
 242 }
 243
 244 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 245 {
 246         return q->write_ptr > q->read_ptr ?
 247                 (i >= q->read_ptr && i < q->write_ptr) :
 248                 !(i < q->read_ptr && i >= q->write_ptr);
 249 }
 250
 251 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 252 {
 253         /* This is for scan command, the big buffer at end of command array */
 254         if (is_huge)
 255                 return q->n_window;     /* must be power of 2 */
 256
 257         /* Otherwise, use normal size buffers */
 258         return index & (q->n_window - 1);
 259 }
 260
 261 /**
 262  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 263  */
 264 static int iwl4965_queue_init(struct iwl4965_priv *priv, struct iwl4965_queue *q,
 265                           int count, int slots_num, u32 id)
 266 {
 267         q->n_bd = count;
 268         q->n_window = slots_num;
 269         q->id = id;
 270
 271         /* count must be power-of-two size, otherwise iwl4965_queue_inc_wrap
 272          * and iwl4965_queue_dec_wrap are broken. */
 273         BUG_ON(!is_power_of_2(count));
 274
 275         /* slots_num must be power-of-two size, otherwise
 276          * get_cmd_index is broken. */
 277         BUG_ON(!is_power_of_2(slots_num));
 278
 279         q->low_mark = q->n_window / 4;
 280         if (q->low_mark < 4)
 281                 q->low_mark = 4;
 282
 283         q->high_mark = q->n_window / 8;
 284         if (q->high_mark < 2)
 285                 q->high_mark = 2;
 286
 287         q->write_ptr = q->read_ptr = 0;
 288
 289         return 0;
 290 }
 291
 292 /**
 293  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 294  */
 295 static int iwl4965_tx_queue_alloc(struct iwl4965_priv *priv,
 296                               struct iwl4965_tx_queue *txq, u32 id)
 297 {
 298         struct pci_dev *dev = priv->pci_dev;
 299
 300         /* Driver private data, only for Tx (not command) queues,
 301          * not shared with device. */
 302         if (id != IWL_CMD_QUEUE_NUM) {
 303                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 304                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 305                 if (!txq->txb) {
 306                         IWL_ERROR("kmalloc for auxiliary BD "
 307                                   "structures failed\n");
 308                         goto error;
 309                 }
 310         } else
 311                 txq->txb = NULL;
 312
 313         /* Circular buffer of transmit frame descriptors (TFDs),
 314          * shared with device */
 315         txq->bd = pci_alloc_consistent(dev,
 316                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 317                         &txq->q.dma_addr);
 318
 319         if (!txq->bd) {
 320                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 321                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 322                 goto error;
 323         }
 324         txq->q.id = id;
 325
 326         return 0;
 327
 328  error:
 329         if (txq->txb) {
 330                 kfree(txq->txb);
 331                 txq->txb = NULL;
 332         }
 333
 334         return -ENOMEM;
 335 }
 336
 337 /**
 338  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 339  */
 340 int iwl4965_tx_queue_init(struct iwl4965_priv *priv,
 341                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 342 {
 343         struct pci_dev *dev = priv->pci_dev;
 344         int len;
 345         int rc = 0;
 346
 347         /*
 348          * Alloc buffer array for commands (Tx or other types of commands).
 349          * For the command queue (#4), allocate command space + one big
 350          * command for scan, since scan command is very huge; the system will
 351          * not have two scans at the same time, so only one is needed.
 352          * For normal Tx queues (all other queues), no super-size command
 353          * space is needed.
 354          */
 355         len = sizeof(struct iwl4965_cmd) * slots_num;
 356         if (txq_id == IWL_CMD_QUEUE_NUM)
 357                 len +=  IWL_MAX_SCAN_SIZE;
 358         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 359         if (!txq->cmd)
 360                 return -ENOMEM;
 361
 362         /* Alloc driver data array and TFD circular buffer */
 363         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 364         if (rc) {
 365                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 366
 367                 return -ENOMEM;
 368         }
 369         txq->need_update = 0;
 370
 371         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 372          * iwl4965_queue_inc_wrap and iwl4965_queue_dec_wrap are broken. */
 373         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 374
 375         /* Initialize queue's high/low-water marks, and head/tail indexes */
 376         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 377
 378         /* Tell device where to find queue */
 379         iwl4965_hw_tx_queue_init(priv, txq);
 380
 381         return 0;
 382 }
 383
 384 /**
 385  * iwl4965_tx_queue_free - Deallocate DMA queue.
 386  * @txq: Transmit queue to deallocate.
 387  *
 388  * Empty queue by removing and destroying all BD's.
 389  * Free all buffers.
 390  * 0-fill, but do not free "txq" descriptor structure.
 391  */
 392 void iwl4965_tx_queue_free(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
 393 {
 394         struct iwl4965_queue *q = &txq->q;
 395         struct pci_dev *dev = priv->pci_dev;
 396         int len;
 397
 398         if (q->n_bd == 0)
 399                 return;
 400
 401         /* first, empty all BD's */
 402         for (; q->write_ptr != q->read_ptr;
 403              q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd))
 404                 iwl4965_hw_txq_free_tfd(priv, txq);
 405
 406         len = sizeof(struct iwl4965_cmd) * q->n_window;
 407         if (q->id == IWL_CMD_QUEUE_NUM)
 408                 len += IWL_MAX_SCAN_SIZE;
 409
 410         /* De-alloc array of command/tx buffers */
 411         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 412
 413         /* De-alloc circular buffer of TFDs */
 414         if (txq->q.n_bd)
 415                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 416                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 417
 418         /* De-alloc array of per-TFD driver data */
 419         if (txq->txb) {
 420                 kfree(txq->txb);
 421                 txq->txb = NULL;
 422         }
 423
 424         /* 0-fill queue descriptor structure */
 425         memset(txq, 0, sizeof(*txq));
 426 }
 427
 428 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 429
 430 /*************** STATION TABLE MANAGEMENT ****
 431  * mac80211 should be examined to determine if sta_info is duplicating
 432  * the functionality provided here
 433  */
 434
 435 /**************************************************************/
 436
 437 #if 0 /* temporary disable till we add real remove station */
 438 /**
 439  * iwl4965_remove_station - Remove driver's knowledge of station.
 440  *
 441  * NOTE:  This does not remove station from device's station table.
 442  */
 443 static u8 iwl4965_remove_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
 444 {
 445         int index = IWL_INVALID_STATION;
 446         int i;
 447         unsigned long flags;
 448
 449         spin_lock_irqsave(&priv->sta_lock, flags);
 450
 451         if (is_ap)
 452                 index = IWL_AP_ID;
 453         else if (is_broadcast_ether_addr(addr))
 454                 index = priv->hw_setting.bcast_sta_id;
 455         else
 456                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 457                         if (priv->stations[i].used &&
 458                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 459                                                 addr)) {
 460                                 index = i;
 461                                 break;
 462                         }
 463
 464         if (unlikely(index == IWL_INVALID_STATION))
 465                 goto out;
 466
 467         if (priv->stations[index].used) {
 468                 priv->stations[index].used = 0;
 469                 priv->num_stations--;
 470         }
 471
 472         BUG_ON(priv->num_stations < 0);
 473
 474 out:
 475         spin_unlock_irqrestore(&priv->sta_lock, flags);
 476         return 0;
 477 }
 478 #endif
 479
 480 /**
 481  * iwl4965_clear_stations_table - Clear the driver's station table
 482  *
 483  * NOTE:  This does not clear or otherwise alter the device's station table.
 484  */
 485 static void iwl4965_clear_stations_table(struct iwl4965_priv *priv)
 486 {
 487         unsigned long flags;
 488
 489         spin_lock_irqsave(&priv->sta_lock, flags);
 490
 491         priv->num_stations = 0;
 492         memset(priv->stations, 0, sizeof(priv->stations));
 493
 494         spin_unlock_irqrestore(&priv->sta_lock, flags);
 495 }
 496
 497 /**
 498  * iwl4965_add_station_flags - Add station to tables in driver and device
 499  */
 500 u8 iwl4965_add_station_flags(struct iwl4965_priv *priv, const u8 *addr,
 501                                 int is_ap, u8 flags, void *ht_data)
 502 {
 503         int i;
 504         int index = IWL_INVALID_STATION;
 505         struct iwl4965_station_entry *station;
 506         unsigned long flags_spin;
 507         DECLARE_MAC_BUF(mac);
 508
 509         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 510         if (is_ap)
 511                 index = IWL_AP_ID;
 512         else if (is_broadcast_ether_addr(addr))
 513                 index = priv->hw_setting.bcast_sta_id;
 514         else
 515                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 516                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 517                                                 addr)) {
 518                                 index = i;
 519                                 break;
 520                         }
 521
 522                         if (!priv->stations[i].used &&
 523                             index == IWL_INVALID_STATION)
 524                                 index = i;
 525                 }
 526
 527
 528         /* These two conditions have the same outcome, but keep them separate
 529           since they have different meanings */
 530         if (unlikely(index == IWL_INVALID_STATION)) {
 531                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 532                 return index;
 533         }
 534
 535         if (priv->stations[index].used &&
 536             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 537                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 538                 return index;
 539         }
 540
 541
 542         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 543         station = &priv->stations[index];
 544         station->used = 1;
 545         priv->num_stations++;
 546
 547         /* Set up the REPLY_ADD_STA command to send to device */
 548         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 549         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 550         station->sta.mode = 0;
 551         station->sta.sta.sta_id = index;
 552         station->sta.station_flags = 0;
 553
 554 #ifdef CONFIG_IWL4965_HT
 555         /* BCAST station and IBSS stations do not work in HT mode */
 556         if (index != priv->hw_setting.bcast_sta_id &&
 557             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 558                 iwl4965_set_ht_add_station(priv, index,
 559                                  (struct ieee80211_ht_info *) ht_data);
 560 #endif /*CONFIG_IWL4965_HT*/
 561
 562         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 563
 564         /* Add station to device's station table */
 565         iwl4965_send_add_station(priv, &station->sta, flags);
 566         return index;
 567
 568 }
 569
 570 /*************** DRIVER STATUS FUNCTIONS   *****/
 571
 572 static inline int iwl4965_is_ready(struct iwl4965_priv *priv)
 573 {
 574         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 575          * set but EXIT_PENDING is not */
 576         return test_bit(STATUS_READY, &priv->status) &&
 577                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 578                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 579 }
 580
 581 static inline int iwl4965_is_alive(struct iwl4965_priv *priv)
 582 {
 583         return test_bit(STATUS_ALIVE, &priv->status);
 584 }
 585
 586 static inline int iwl4965_is_init(struct iwl4965_priv *priv)
 587 {
 588         return test_bit(STATUS_INIT, &priv->status);
 589 }
 590
 591 static inline int iwl4965_is_rfkill(struct iwl4965_priv *priv)
 592 {
 593         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 594                test_bit(STATUS_RF_KILL_SW, &priv->status);
 595 }
 596
 597 static inline int iwl4965_is_ready_rf(struct iwl4965_priv *priv)
 598 {
 599
 600         if (iwl4965_is_rfkill(priv))
 601                 return 0;
 602
 603         return iwl4965_is_ready(priv);
 604 }
 605
 606 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 607
 608 #define IWL_CMD(x) case x : return #x
 609
 610 static const char *get_cmd_string(u8 cmd)
 611 {
 612         switch (cmd) {
 613                 IWL_CMD(REPLY_ALIVE);
 614                 IWL_CMD(REPLY_ERROR);
 615                 IWL_CMD(REPLY_RXON);
 616                 IWL_CMD(REPLY_RXON_ASSOC);
 617                 IWL_CMD(REPLY_QOS_PARAM);
 618                 IWL_CMD(REPLY_RXON_TIMING);
 619                 IWL_CMD(REPLY_ADD_STA);
 620                 IWL_CMD(REPLY_REMOVE_STA);
 621                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 622                 IWL_CMD(REPLY_TX);
 623                 IWL_CMD(REPLY_RATE_SCALE);
 624                 IWL_CMD(REPLY_LEDS_CMD);
 625                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 626                 IWL_CMD(RADAR_NOTIFICATION);
 627                 IWL_CMD(REPLY_QUIET_CMD);
 628                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 629                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 630                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 631                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 632                 IWL_CMD(POWER_TABLE_CMD);
 633                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 634                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 635                 IWL_CMD(REPLY_SCAN_CMD);
 636                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 637                 IWL_CMD(SCAN_START_NOTIFICATION);
 638                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 639                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 640                 IWL_CMD(BEACON_NOTIFICATION);
 641                 IWL_CMD(REPLY_TX_BEACON);
 642                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 643                 IWL_CMD(QUIET_NOTIFICATION);
 644                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 645                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 646                 IWL_CMD(REPLY_BT_CONFIG);
 647                 IWL_CMD(REPLY_STATISTICS_CMD);
 648                 IWL_CMD(STATISTICS_NOTIFICATION);
 649                 IWL_CMD(REPLY_CARD_STATE_CMD);
 650                 IWL_CMD(CARD_STATE_NOTIFICATION);
 651                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 652                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 653                 IWL_CMD(SENSITIVITY_CMD);
 654                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 655                 IWL_CMD(REPLY_RX_PHY_CMD);
 656                 IWL_CMD(REPLY_RX_MPDU_CMD);
 657                 IWL_CMD(REPLY_4965_RX);
 658                 IWL_CMD(REPLY_COMPRESSED_BA);
 659         default:
 660                 return "UNKNOWN";
 661
 662         }
 663 }
 664
 665 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 666
 667 /**
 668  * iwl4965_enqueue_hcmd - enqueue a uCode command
 669  * @priv: device private data point
 670  * @cmd: a point to the ucode command structure
 671  *
 672  * The function returns < 0 values to indicate the operation is
 673  * failed. On success, it turns the index (> 0) of command in the
 674  * command queue.
 675  */
 676 static int iwl4965_enqueue_hcmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 677 {
 678         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 679         struct iwl4965_queue *q = &txq->q;
 680         struct iwl4965_tfd_frame *tfd;
 681         u32 *control_flags;
 682         struct iwl4965_cmd *out_cmd;
 683         u32 idx;
 684         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 685         dma_addr_t phys_addr;
 686         int ret;
 687         unsigned long flags;
 688
 689         /* If any of the command structures end up being larger than
 690          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 691          * we will need to increase the size of the TFD entries */
 692         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 693                !(cmd->meta.flags & CMD_SIZE_HUGE));
 694
 695         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 696                 IWL_ERROR("No space for Tx\n");
 697                 return -ENOSPC;
 698         }
 699
 700         spin_lock_irqsave(&priv->hcmd_lock, flags);
 701
 702         tfd = &txq->bd[q->write_ptr];
 703         memset(tfd, 0, sizeof(*tfd));
 704
 705         control_flags = (u32 *) tfd;
 706
 707         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 708         out_cmd = &txq->cmd[idx];
 709
 710         out_cmd->hdr.cmd = cmd->id;
 711         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 712         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 713
 714         /* At this point, the out_cmd now has all of the incoming cmd
 715          * information */
 716
 717         out_cmd->hdr.flags = 0;
 718         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 719                         INDEX_TO_SEQ(q->write_ptr));
 720         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 721                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 722
 723         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 724                         offsetof(struct iwl4965_cmd, hdr);
 725         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 726
 727         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 728                      "%d bytes at %d[%d]:%d\n",
 729                      get_cmd_string(out_cmd->hdr.cmd),
 730                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 731                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 732
 733         txq->need_update = 1;
 734
 735         /* Set up entry in queue's byte count circular buffer */
 736         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 737
 738         /* Increment and update queue's write index */
 739         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
 740         iwl4965_tx_queue_update_write_ptr(priv, txq);
 741
 742         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 743         return ret ? ret : idx;
 744 }
 745
 746 static int iwl4965_send_cmd_async(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 747 {
 748         int ret;
 749
 750         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 751
 752         /* An asynchronous command can not expect an SKB to be set. */
 753         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 754
 755         /* An asynchronous command MUST have a callback. */
 756         BUG_ON(!cmd->meta.u.callback);
 757
 758         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 759                 return -EBUSY;
 760
 761         ret = iwl4965_enqueue_hcmd(priv, cmd);
 762         if (ret < 0) {
 763                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 764                           get_cmd_string(cmd->id), ret);
 765                 return ret;
 766         }
 767         return 0;
 768 }
 769
 770 static int iwl4965_send_cmd_sync(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 771 {
 772         int cmd_idx;
 773         int ret;
 774         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 775
 776         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 777
 778          /* A synchronous command can not have a callback set. */
 779         BUG_ON(cmd->meta.u.callback != NULL);
 780
 781         if (atomic_xchg(&entry, 1)) {
 782                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 783                           get_cmd_string(cmd->id));
 784                 return -EBUSY;
 785         }
 786
 787         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 788
 789         if (cmd->meta.flags & CMD_WANT_SKB)
 790                 cmd->meta.source = &cmd->meta;
 791
 792         cmd_idx = iwl4965_enqueue_hcmd(priv, cmd);
 793         if (cmd_idx < 0) {
 794                 ret = cmd_idx;
 795                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 796                           get_cmd_string(cmd->id), ret);
 797                 goto out;
 798         }
 799
 800         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 801                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 802                         HOST_COMPLETE_TIMEOUT);
 803         if (!ret) {
 804                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 805                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 806                                   get_cmd_string(cmd->id),
 807                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 808
 809                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 810                         ret = -ETIMEDOUT;
 811                         goto cancel;
 812                 }
 813         }
 814
 815         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 816                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 817                                get_cmd_string(cmd->id));
 818                 ret = -ECANCELED;
 819                 goto fail;
 820         }
 821         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 822                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 823                                get_cmd_string(cmd->id));
 824                 ret = -EIO;
 825                 goto fail;
 826         }
 827         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 828                 IWL_ERROR("Error: Response NULL in '%s'\n",
 829                           get_cmd_string(cmd->id));
 830                 ret = -EIO;
 831                 goto out;
 832         }
 833
 834         ret = 0;
 835         goto out;
 836
 837 cancel:
 838         if (cmd->meta.flags & CMD_WANT_SKB) {
 839                 struct iwl4965_cmd *qcmd;
 840
 841                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 842                  * TX cmd queue. Otherwise in case the cmd comes
 843                  * in later, it will possibly set an invalid
 844                  * address (cmd->meta.source). */
 845                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 846                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 847         }
 848 fail:
 849         if (cmd->meta.u.skb) {
 850                 dev_kfree_skb_any(cmd->meta.u.skb);
 851                 cmd->meta.u.skb = NULL;
 852         }
 853 out:
 854         atomic_set(&entry, 0);
 855         return ret;
 856 }
 857
 858 int iwl4965_send_cmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 859 {
 860         if (cmd->meta.flags & CMD_ASYNC)
 861                 return iwl4965_send_cmd_async(priv, cmd);
 862
 863         return iwl4965_send_cmd_sync(priv, cmd);
 864 }
 865
 866 int iwl4965_send_cmd_pdu(struct iwl4965_priv *priv, u8 id, u16 len, const void *data)
 867 {
 868         struct iwl4965_host_cmd cmd = {
 869                 .id = id,
 870                 .len = len,
 871                 .data = data,
 872         };
 873
 874         return iwl4965_send_cmd_sync(priv, &cmd);
 875 }
 876
 877 static int __must_check iwl4965_send_cmd_u32(struct iwl4965_priv *priv, u8 id, u32 val)
 878 {
 879         struct iwl4965_host_cmd cmd = {
 880                 .id = id,
 881                 .len = sizeof(val),
 882                 .data = &val,
 883         };
 884
 885         return iwl4965_send_cmd_sync(priv, &cmd);
 886 }
 887
 888 int iwl4965_send_statistics_request(struct iwl4965_priv *priv)
 889 {
 890         return iwl4965_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 891 }
 892
 893 /**
 894  * iwl4965_rxon_add_station - add station into station table.
 895  *
 896  * there is only one AP station with id= IWL_AP_ID
 897  * NOTE: mutex must be held before calling this fnction
 898  */
 899 static int iwl4965_rxon_add_station(struct iwl4965_priv *priv,
 900                                 const u8 *addr, int is_ap)
 901 {
 902         u8 sta_id;
 903
 904         /* Add station to device's station table */
 905 #ifdef CONFIG_IWL4965_HT
 906         struct ieee80211_conf *conf = &priv->hw->conf;
 907         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 908
 909         if ((is_ap) &&
 910             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 911             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 912                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 913                                                    0, cur_ht_config);
 914         else
 915 #endif /* CONFIG_IWL4965_HT */
 916                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 917                                                    0, NULL);
 918
 919         /* Set up default rate scaling table in device's station table */
 920         iwl4965_add_station(priv, addr, is_ap);
 921
 922         return sta_id;
 923 }
 924
 925 /**
 926  * iwl4965_set_rxon_channel - Set the phymode and channel values in staging RXON
 927  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 928  * @channel: Any channel valid for the requested phymode
 929
 930  * In addition to setting the staging RXON, priv->phymode is also set.
 931  *
 932  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 933  * in the staging RXON flag structure based on the phymode
 934  */
 935 static int iwl4965_set_rxon_channel(struct iwl4965_priv *priv, u8 phymode,
 936                                  u16 channel)
 937 {
 938         if (!iwl4965_get_channel_info(priv, phymode, channel)) {
 939                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 940                                channel, phymode);
 941                 return -EINVAL;
 942         }
 943
 944         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 945             (priv->phymode == phymode))
 946                 return 0;
 947
 948         priv->staging_rxon.channel = cpu_to_le16(channel);
 949         if (phymode == MODE_IEEE80211A)
 950                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 951         else
 952                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 953
 954         priv->phymode = phymode;
 955
 956         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 957
 958         return 0;
 959 }
 960
 961 /**
 962  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 963  *
 964  * NOTE:  This is really only useful during development and can eventually
 965  * be #ifdef'd out once the driver is stable and folks aren't actively
 966  * making changes
 967  */
 968 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 969 {
 970         int error = 0;
 971         int counter = 1;
 972
 973         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 974                 error |= le32_to_cpu(rxon->flags &
 975                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 976                                  RXON_FLG_RADAR_DETECT_MSK));
 977                 if (error)
 978                         IWL_WARNING("check 24G fields %d | %d\n",
 979                                     counter++, error);
 980         } else {
 981                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 982                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 983                 if (error)
 984                         IWL_WARNING("check 52 fields %d | %d\n",
 985                                     counter++, error);
 986                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 987                 if (error)
 988                         IWL_WARNING("check 52 CCK %d | %d\n",
 989                                     counter++, error);
 990         }
 991         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 992         if (error)
 993                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 994
 995         /* make sure basic rates 6Mbps and 1Mbps are supported */
 996         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 997                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 998         if (error)
 999                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
1000
1001         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
1002         if (error)
1003                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
1004
1005         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
1006                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
1007         if (error)
1008                 IWL_WARNING("check CCK and short slot %d | %d\n",
1009                             counter++, error);
1010
1011         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
1012                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
1013         if (error)
1014                 IWL_WARNING("check CCK & auto detect %d | %d\n",
1015                             counter++, error);
1016
1017         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
1018                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
1019         if (error)
1020                 IWL_WARNING("check TGG and auto detect %d | %d\n",
1021                             counter++, error);
1022
1023         if (error)
1024                 IWL_WARNING("Tuning to channel %d\n",
1025                             le16_to_cpu(rxon->channel));
1026
1027         if (error) {
1028                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
1029                 return -1;
1030         }
1031         return 0;
1032 }
1033
1034 /**
1035  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1036  * @priv: staging_rxon is compared to active_rxon
1037  *
1038  * If the RXON structure is changing enough to require a new tune,
1039  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1040  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1041  */
1042 static int iwl4965_full_rxon_required(struct iwl4965_priv *priv)
1043 {
1044
1045         /* These items are only settable from the full RXON command */
1046         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1047             compare_ether_addr(priv->staging_rxon.bssid_addr,
1048                                priv->active_rxon.bssid_addr) ||
1049             compare_ether_addr(priv->staging_rxon.node_addr,
1050                                priv->active_rxon.node_addr) ||
1051             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1052                                priv->active_rxon.wlap_bssid_addr) ||
1053             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1054             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1055             (priv->staging_rxon.air_propagation !=
1056              priv->active_rxon.air_propagation) ||
1057             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
1058              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
1059             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
1060              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
1061             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
1062             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1063                 return 1;
1064
1065         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1066          * be updated with the RXON_ASSOC command -- however only some
1067          * flag transitions are allowed using RXON_ASSOC */
1068
1069         /* Check if we are not switching bands */
1070         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1071             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1072                 return 1;
1073
1074         /* Check if we are switching association toggle */
1075         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1076                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1077                 return 1;
1078
1079         return 0;
1080 }
1081
1082 static int iwl4965_send_rxon_assoc(struct iwl4965_priv *priv)
1083 {
1084         int rc = 0;
1085         struct iwl4965_rx_packet *res = NULL;
1086         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1087         struct iwl4965_host_cmd cmd = {
1088                 .id = REPLY_RXON_ASSOC,
1089                 .len = sizeof(rxon_assoc),
1090                 .meta.flags = CMD_WANT_SKB,
1091                 .data = &rxon_assoc,
1092         };
1093         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
1094         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
1095
1096         if ((rxon1->flags == rxon2->flags) &&
1097             (rxon1->filter_flags == rxon2->filter_flags) &&
1098             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1099             (rxon1->ofdm_ht_single_stream_basic_rates ==
1100              rxon2->ofdm_ht_single_stream_basic_rates) &&
1101             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1102              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1103             (rxon1->rx_chain == rxon2->rx_chain) &&
1104             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1105                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1106                 return 0;
1107         }
1108
1109         rxon_assoc.flags = priv->staging_rxon.flags;
1110         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1111         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1112         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1113         rxon_assoc.reserved = 0;
1114         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1115             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1116         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1117             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1118         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1119
1120         rc = iwl4965_send_cmd_sync(priv, &cmd);
1121         if (rc)
1122                 return rc;
1123
1124         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1125         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1126                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1127                 rc = -EIO;
1128         }
1129
1130         priv->alloc_rxb_skb--;
1131         dev_kfree_skb_any(cmd.meta.u.skb);
1132
1133         return rc;
1134 }
1135
1136 /**
1137  * iwl4965_commit_rxon - commit staging_rxon to hardware
1138  *
1139  * The RXON command in staging_rxon is committed to the hardware and
1140  * the active_rxon structure is updated with the new data.  This
1141  * function correctly transitions out of the RXON_ASSOC_MSK state if
1142  * a HW tune is required based on the RXON structure changes.
1143  */
1144 static int iwl4965_commit_rxon(struct iwl4965_priv *priv)
1145 {
1146         /* cast away the const for active_rxon in this function */
1147         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1148         DECLARE_MAC_BUF(mac);
1149         int rc = 0;
1150
1151         if (!iwl4965_is_alive(priv))
1152                 return -1;
1153
1154         /* always get timestamp with Rx frame */
1155         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1156
1157         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
1158         if (rc) {
1159                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1160                 return -EINVAL;
1161         }
1162
1163         /* If we don't need to send a full RXON, we can use
1164          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
1165          * and other flags for the current radio configuration. */
1166         if (!iwl4965_full_rxon_required(priv)) {
1167                 rc = iwl4965_send_rxon_assoc(priv);
1168                 if (rc) {
1169                         IWL_ERROR("Error setting RXON_ASSOC "
1170                                   "configuration (%d).\n", rc);
1171                         return rc;
1172                 }
1173
1174                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1175
1176                 return 0;
1177         }
1178
1179         /* station table will be cleared */
1180         priv->assoc_station_added = 0;
1181
1182 #ifdef CONFIG_IWL4965_SENSITIVITY
1183         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1184         if (!priv->error_recovering)
1185                 priv->start_calib = 0;
1186
1187         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1188 #endif /* CONFIG_IWL4965_SENSITIVITY */
1189
1190         /* If we are currently associated and the new config requires
1191          * an RXON_ASSOC and the new config wants the associated mask enabled,
1192          * we must clear the associated from the active configuration
1193          * before we apply the new config */
1194         if (iwl4965_is_associated(priv) &&
1195             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1196                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1197                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1198
1199                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1200                                       sizeof(struct iwl4965_rxon_cmd),
1201                                       &priv->active_rxon);
1202
1203                 /* If the mask clearing failed then we set
1204                  * active_rxon back to what it was previously */
1205                 if (rc) {
1206                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1207                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1208                                   "configuration (%d).\n", rc);
1209                         return rc;
1210                 }
1211         }
1212
1213         IWL_DEBUG_INFO("Sending RXON\n"
1214                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1215                        "* channel = %d\n"
1216                        "* bssid = %s\n",
1217                        ((priv->staging_rxon.filter_flags &
1218                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1219                        le16_to_cpu(priv->staging_rxon.channel),
1220                        print_mac(mac, priv->staging_rxon.bssid_addr));
1221
1222         /* Apply the new configuration */
1223         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1224                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
1225         if (rc) {
1226                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1227                 return rc;
1228         }
1229
1230         iwl4965_clear_stations_table(priv);
1231
1232 #ifdef CONFIG_IWL4965_SENSITIVITY
1233         if (!priv->error_recovering)
1234                 priv->start_calib = 0;
1235
1236         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1237         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1238 #endif /* CONFIG_IWL4965_SENSITIVITY */
1239
1240         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1241
1242         /* If we issue a new RXON command which required a tune then we must
1243          * send a new TXPOWER command or we won't be able to Tx any frames */
1244         rc = iwl4965_hw_reg_send_txpower(priv);
1245         if (rc) {
1246                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1247                 return rc;
1248         }
1249
1250         /* Add the broadcast address so we can send broadcast frames */
1251         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
1252             IWL_INVALID_STATION) {
1253                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1254                 return -EIO;
1255         }
1256
1257         /* If we have set the ASSOC_MSK and we are in BSS mode then
1258          * add the IWL_AP_ID to the station rate table */
1259         if (iwl4965_is_associated(priv) &&
1260             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1261                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1262                     == IWL_INVALID_STATION) {
1263                         IWL_ERROR("Error adding AP address for transmit.\n");
1264                         return -EIO;
1265                 }
1266                 priv->assoc_station_added = 1;
1267         }
1268
1269         return 0;
1270 }
1271
1272 static int iwl4965_send_bt_config(struct iwl4965_priv *priv)
1273 {
1274         struct iwl4965_bt_cmd bt_cmd = {
1275                 .flags = 3,
1276                 .lead_time = 0xAA,
1277                 .max_kill = 1,
1278                 .kill_ack_mask = 0,
1279                 .kill_cts_mask = 0,
1280         };
1281
1282         return iwl4965_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1283                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
1284 }
1285
1286 static int iwl4965_send_scan_abort(struct iwl4965_priv *priv)
1287 {
1288         int rc = 0;
1289         struct iwl4965_rx_packet *res;
1290         struct iwl4965_host_cmd cmd = {
1291                 .id = REPLY_SCAN_ABORT_CMD,
1292                 .meta.flags = CMD_WANT_SKB,
1293         };
1294
1295         /* If there isn't a scan actively going on in the hardware
1296          * then we are in between scan bands and not actually
1297          * actively scanning, so don't send the abort command */
1298         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1299                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1300                 return 0;
1301         }
1302
1303         rc = iwl4965_send_cmd_sync(priv, &cmd);
1304         if (rc) {
1305                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1306                 return rc;
1307         }
1308
1309         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1310         if (res->u.status != CAN_ABORT_STATUS) {
1311                 /* The scan abort will return 1 for success or
1312                  * 2 for "failure".  A failure condition can be
1313                  * due to simply not being in an active scan which
1314                  * can occur if we send the scan abort before we
1315                  * the microcode has notified us that a scan is
1316                  * completed. */
1317                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1318                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1319                 clear_bit(STATUS_SCAN_HW, &priv->status);
1320         }
1321
1322         dev_kfree_skb_any(cmd.meta.u.skb);
1323
1324         return rc;
1325 }
1326
1327 static int iwl4965_card_state_sync_callback(struct iwl4965_priv *priv,
1328                                         struct iwl4965_cmd *cmd,
1329                                         struct sk_buff *skb)
1330 {
1331         return 1;
1332 }
1333
1334 /*
1335  * CARD_STATE_CMD
1336  *
1337  * Use: Sets the device's internal card state to enable, disable, or halt
1338  *
1339  * When in the 'enable' state the card operates as normal.
1340  * When in the 'disable' state, the card enters into a low power mode.
1341  * When in the 'halt' state, the card is shut down and must be fully
1342  * restarted to come back on.
1343  */
1344 static int iwl4965_send_card_state(struct iwl4965_priv *priv, u32 flags, u8 meta_flag)
1345 {
1346         struct iwl4965_host_cmd cmd = {
1347                 .id = REPLY_CARD_STATE_CMD,
1348                 .len = sizeof(u32),
1349                 .data = &flags,
1350                 .meta.flags = meta_flag,
1351         };
1352
1353         if (meta_flag & CMD_ASYNC)
1354                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1355
1356         return iwl4965_send_cmd(priv, &cmd);
1357 }
1358
1359 static int iwl4965_add_sta_sync_callback(struct iwl4965_priv *priv,
1360                                      struct iwl4965_cmd *cmd, struct sk_buff *skb)
1361 {
1362         struct iwl4965_rx_packet *res = NULL;
1363
1364         if (!skb) {
1365                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1366                 return 1;
1367         }
1368
1369         res = (struct iwl4965_rx_packet *)skb->data;
1370         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1371                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1372                           res->hdr.flags);
1373                 return 1;
1374         }
1375
1376         switch (res->u.add_sta.status) {
1377         case ADD_STA_SUCCESS_MSK:
1378                 break;
1379         default:
1380                 break;
1381         }
1382
1383         /* We didn't cache the SKB; let the caller free it */
1384         return 1;
1385 }
1386
1387 int iwl4965_send_add_station(struct iwl4965_priv *priv,
1388                          struct iwl4965_addsta_cmd *sta, u8 flags)
1389 {
1390         struct iwl4965_rx_packet *res = NULL;
1391         int rc = 0;
1392         struct iwl4965_host_cmd cmd = {
1393                 .id = REPLY_ADD_STA,
1394                 .len = sizeof(struct iwl4965_addsta_cmd),
1395                 .meta.flags = flags,
1396                 .data = sta,
1397         };
1398
1399         if (flags & CMD_ASYNC)
1400                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1401         else
1402                 cmd.meta.flags |= CMD_WANT_SKB;
1403
1404         rc = iwl4965_send_cmd(priv, &cmd);
1405
1406         if (rc || (flags & CMD_ASYNC))
1407                 return rc;
1408
1409         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1410         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1411                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1412                           res->hdr.flags);
1413                 rc = -EIO;
1414         }
1415
1416         if (rc == 0) {
1417                 switch (res->u.add_sta.status) {
1418                 case ADD_STA_SUCCESS_MSK:
1419                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1420                         break;
1421                 default:
1422                         rc = -EIO;
1423                         IWL_WARNING("REPLY_ADD_STA failed\n");
1424                         break;
1425                 }
1426         }
1427
1428         priv->alloc_rxb_skb--;
1429         dev_kfree_skb_any(cmd.meta.u.skb);
1430
1431         return rc;
1432 }
1433
1434 static int iwl4965_update_sta_key_info(struct iwl4965_priv *priv,
1435                                    struct ieee80211_key_conf *keyconf,
1436                                    u8 sta_id)
1437 {
1438         unsigned long flags;
1439         __le16 key_flags = 0;
1440
1441         switch (keyconf->alg) {
1442         case ALG_CCMP:
1443                 key_flags |= STA_KEY_FLG_CCMP;
1444                 key_flags |= cpu_to_le16(
1445                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1446                 key_flags &= ~STA_KEY_FLG_INVALID;
1447                 break;
1448         case ALG_TKIP:
1449         case ALG_WEP:
1450         default:
1451                 return -EINVAL;
1452         }
1453         spin_lock_irqsave(&priv->sta_lock, flags);
1454         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1455         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1456         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1457                keyconf->keylen);
1458
1459         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1460                keyconf->keylen);
1461         priv->stations[sta_id].sta.key.key_flags = key_flags;
1462         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1463         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1464
1465         spin_unlock_irqrestore(&priv->sta_lock, flags);
1466
1467         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1468         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1469         return 0;
1470 }
1471
1472 static int iwl4965_clear_sta_key_info(struct iwl4965_priv *priv, u8 sta_id)
1473 {
1474         unsigned long flags;
1475
1476         spin_lock_irqsave(&priv->sta_lock, flags);
1477         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1478         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1479         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1480         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1481         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1482         spin_unlock_irqrestore(&priv->sta_lock, flags);
1483
1484         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1485         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1486         return 0;
1487 }
1488
1489 static void iwl4965_clear_free_frames(struct iwl4965_priv *priv)
1490 {
1491         struct list_head *element;
1492
1493         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1494                        priv->frames_count);
1495
1496         while (!list_empty(&priv->free_frames)) {
1497                 element = priv->free_frames.next;
1498                 list_del(element);
1499                 kfree(list_entry(element, struct iwl4965_frame, list));
1500                 priv->frames_count--;
1501         }
1502
1503         if (priv->frames_count) {
1504                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1505                             priv->frames_count);
1506                 priv->frames_count = 0;
1507         }
1508 }
1509
1510 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl4965_priv *priv)
1511 {
1512         struct iwl4965_frame *frame;
1513         struct list_head *element;
1514         if (list_empty(&priv->free_frames)) {
1515                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1516                 if (!frame) {
1517                         IWL_ERROR("Could not allocate frame!\n");
1518                         return NULL;
1519                 }
1520
1521                 priv->frames_count++;
1522                 return frame;
1523         }
1524
1525         element = priv->free_frames.next;
1526         list_del(element);
1527         return list_entry(element, struct iwl4965_frame, list);
1528 }
1529
1530 static void iwl4965_free_frame(struct iwl4965_priv *priv, struct iwl4965_frame *frame)
1531 {
1532         memset(frame, 0, sizeof(*frame));
1533         list_add(&frame->list, &priv->free_frames);
1534 }
1535
1536 unsigned int iwl4965_fill_beacon_frame(struct iwl4965_priv *priv,
1537                                 struct ieee80211_hdr *hdr,
1538                                 const u8 *dest, int left)
1539 {
1540
1541         if (!iwl4965_is_associated(priv) || !priv->ibss_beacon ||
1542             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1543              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1544                 return 0;
1545
1546         if (priv->ibss_beacon->len > left)
1547                 return 0;
1548
1549         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1550
1551         return priv->ibss_beacon->len;
1552 }
1553
1554 int iwl4965_rate_index_from_plcp(int plcp)
1555 {
1556         int i = 0;
1557
1558         /* 4965 HT rate format */
1559         if (plcp & RATE_MCS_HT_MSK) {
1560                 i = (plcp & 0xff);
1561
1562                 if (i >= IWL_RATE_MIMO_6M_PLCP)
1563                         i = i - IWL_RATE_MIMO_6M_PLCP;
1564
1565                 i += IWL_FIRST_OFDM_RATE;
1566                 /* skip 9M not supported in ht*/
1567                 if (i >= IWL_RATE_9M_INDEX)
1568                         i += 1;
1569                 if ((i >= IWL_FIRST_OFDM_RATE) &&
1570                     (i <= IWL_LAST_OFDM_RATE))
1571                         return i;
1572
1573         /* 4965 legacy rate format, search for match in table */
1574         } else {
1575                 for (i = 0; i < ARRAY_SIZE(iwl4965_rates); i++)
1576                         if (iwl4965_rates[i].plcp == (plcp &0xFF))
1577                                 return i;
1578         }
1579         return -1;
1580 }
1581
1582 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1583 {
1584         u8 i;
1585
1586         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1587              i = iwl4965_rates[i].next_ieee) {
1588                 if (rate_mask & (1 << i))
1589                         return iwl4965_rates[i].plcp;
1590         }
1591
1592         return IWL_RATE_INVALID;
1593 }
1594
1595 static int iwl4965_send_beacon_cmd(struct iwl4965_priv *priv)
1596 {
1597         struct iwl4965_frame *frame;
1598         unsigned int frame_size;
1599         int rc;
1600         u8 rate;
1601
1602         frame = iwl4965_get_free_frame(priv);
1603
1604         if (!frame) {
1605                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1606                           "command.\n");
1607                 return -ENOMEM;
1608         }
1609
1610         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1611                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1612                                                 0xFF0);
1613                 if (rate == IWL_INVALID_RATE)
1614                         rate = IWL_RATE_6M_PLCP;
1615         } else {
1616                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1617                 if (rate == IWL_INVALID_RATE)
1618                         rate = IWL_RATE_1M_PLCP;
1619         }
1620
1621         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1622
1623         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1624                               &frame->u.cmd[0]);
1625
1626         iwl4965_free_frame(priv, frame);
1627
1628         return rc;
1629 }
1630
1631 /******************************************************************************
1632  *
1633  * EEPROM related functions
1634  *
1635  ******************************************************************************/
1636
1637 static void get_eeprom_mac(struct iwl4965_priv *priv, u8 *mac)
1638 {
1639         memcpy(mac, priv->eeprom.mac_address, 6);
1640 }
1641
1642 /**
1643  * iwl4965_eeprom_init - read EEPROM contents
1644  *
1645  * Load the EEPROM contents from adapter into priv->eeprom
1646  *
1647  * NOTE:  This routine uses the non-debug IO access functions.
1648  */
1649 int iwl4965_eeprom_init(struct iwl4965_priv *priv)
1650 {
1651         __le16 *e = (__le16 *)&priv->eeprom;
1652         u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP);
1653         u32 r;
1654         int sz = sizeof(priv->eeprom);
1655         int rc;
1656         int i;
1657         u16 addr;
1658
1659         /* The EEPROM structure has several padding buffers within it
1660          * and when adding new EEPROM maps is subject to programmer errors
1661          * which may be very difficult to identify without explicitly
1662          * checking the resulting size of the eeprom map. */
1663         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1664
1665         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1666                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1667                 return -ENOENT;
1668         }
1669
1670         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1671         rc = iwl4965_eeprom_acquire_semaphore(priv);
1672         if (rc < 0) {
1673                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1674                 return -ENOENT;
1675         }
1676
1677         /* eeprom is an array of 16bit values */
1678         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1679                 _iwl4965_write32(priv, CSR_EEPROM_REG, addr << 1);
1680                 _iwl4965_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1681
1682                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1683                                         i += IWL_EEPROM_ACCESS_DELAY) {
1684                         r = _iwl4965_read_direct32(priv, CSR_EEPROM_REG);
1685                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1686                                 break;
1687                         udelay(IWL_EEPROM_ACCESS_DELAY);
1688                 }
1689
1690                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1691                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1692                         rc = -ETIMEDOUT;
1693                         goto done;
1694                 }
1695                 e[addr / 2] = cpu_to_le16(r >> 16);
1696         }
1697         rc = 0;
1698
1699 done:
1700         iwl4965_eeprom_release_semaphore(priv);
1701         return rc;
1702 }
1703
1704 /******************************************************************************
1705  *
1706  * Misc. internal state and helper functions
1707  *
1708  ******************************************************************************/
1709 #ifdef CONFIG_IWL4965_DEBUG
1710
1711 /**
1712  * iwl4965_report_frame - dump frame to syslog during debug sessions
1713  *
1714  * You may hack this function to show different aspects of received frames,
1715  * including selective frame dumps.
1716  * group100 parameter selects whether to show 1 out of 100 good frames.
1717  *
1718  * TODO:  This was originally written for 3945, need to audit for
1719  *        proper operation with 4965.
1720  */
1721 void iwl4965_report_frame(struct iwl4965_priv *priv,
1722                       struct iwl4965_rx_packet *pkt,
1723                       struct ieee80211_hdr *header, int group100)
1724 {
1725         u32 to_us;
1726         u32 print_summary = 0;
1727         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1728         u32 hundred = 0;
1729         u32 dataframe = 0;
1730         u16 fc;
1731         u16 seq_ctl;
1732         u16 channel;
1733         u16 phy_flags;
1734         int rate_sym;
1735         u16 length;
1736         u16 status;
1737         u16 bcn_tmr;
1738         u32 tsf_low;
1739         u64 tsf;
1740         u8 rssi;
1741         u8 agc;
1742         u16 sig_avg;
1743         u16 noise_diff;
1744         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1745         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1746         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
1747         u8 *data = IWL_RX_DATA(pkt);
1748
1749         /* MAC header */
1750         fc = le16_to_cpu(header->frame_control);
1751         seq_ctl = le16_to_cpu(header->seq_ctrl);
1752
1753         /* metadata */
1754         channel = le16_to_cpu(rx_hdr->channel);
1755         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1756         rate_sym = rx_hdr->rate;
1757         length = le16_to_cpu(rx_hdr->len);
1758
1759         /* end-of-frame status and timestamp */
1760         status = le32_to_cpu(rx_end->status);
1761         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1762         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1763         tsf = le64_to_cpu(rx_end->timestamp);
1764
1765         /* signal statistics */
1766         rssi = rx_stats->rssi;
1767         agc = rx_stats->agc;
1768         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1769         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1770
1771         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1772
1773         /* if data frame is to us and all is good,
1774          *   (optionally) print summary for only 1 out of every 100 */
1775         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1776             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1777                 dataframe = 1;
1778                 if (!group100)
1779                         print_summary = 1;      /* print each frame */
1780                 else if (priv->framecnt_to_us < 100) {
1781                         priv->framecnt_to_us++;
1782                         print_summary = 0;
1783                 } else {
1784                         priv->framecnt_to_us = 0;
1785                         print_summary = 1;
1786                         hundred = 1;
1787                 }
1788         } else {
1789                 /* print summary for all other frames */
1790                 print_summary = 1;
1791         }
1792
1793         if (print_summary) {
1794                 char *title;
1795                 u32 rate;
1796
1797                 if (hundred)
1798                         title = "100Frames";
1799                 else if (fc & IEEE80211_FCTL_RETRY)
1800                         title = "Retry";
1801                 else if (ieee80211_is_assoc_response(fc))
1802                         title = "AscRsp";
1803                 else if (ieee80211_is_reassoc_response(fc))
1804                         title = "RasRsp";
1805                 else if (ieee80211_is_probe_response(fc)) {
1806                         title = "PrbRsp";
1807                         print_dump = 1; /* dump frame contents */
1808                 } else if (ieee80211_is_beacon(fc)) {
1809                         title = "Beacon";
1810                         print_dump = 1; /* dump frame contents */
1811                 } else if (ieee80211_is_atim(fc))
1812                         title = "ATIM";
1813                 else if (ieee80211_is_auth(fc))
1814                         title = "Auth";
1815                 else if (ieee80211_is_deauth(fc))
1816                         title = "DeAuth";
1817                 else if (ieee80211_is_disassoc(fc))
1818                         title = "DisAssoc";
1819                 else
1820                         title = "Frame";
1821
1822                 rate = iwl4965_rate_index_from_plcp(rate_sym);
1823                 if (rate == -1)
1824                         rate = 0;
1825                 else
1826                         rate = iwl4965_rates[rate].ieee / 2;
1827
1828                 /* print frame summary.
1829                  * MAC addresses show just the last byte (for brevity),
1830                  *    but you can hack it to show more, if you'd like to. */
1831                 if (dataframe)
1832                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1833                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1834                                      title, fc, header->addr1[5],
1835                                      length, rssi, channel, rate);
1836                 else {
1837                         /* src/dst addresses assume managed mode */
1838                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1839                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1840                                      "phy=0x%02x, chnl=%d\n",
1841                                      title, fc, header->addr1[5],
1842                                      header->addr3[5], rssi,
1843                                      tsf_low - priv->scan_start_tsf,
1844                                      phy_flags, channel);
1845                 }
1846         }
1847         if (print_dump)
1848                 iwl4965_print_hex_dump(IWL_DL_RX, data, length);
1849 }
1850 #endif
1851
1852 static void iwl4965_unset_hw_setting(struct iwl4965_priv *priv)
1853 {
1854         if (priv->hw_setting.shared_virt)
1855                 pci_free_consistent(priv->pci_dev,
1856                                     sizeof(struct iwl4965_shared),
1857                                     priv->hw_setting.shared_virt,
1858                                     priv->hw_setting.shared_phys);
1859 }
1860
1861 /**
1862  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1863  *
1864  * return : set the bit for each supported rate insert in ie
1865  */
1866 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1867                                     u16 basic_rate, int *left)
1868 {
1869         u16 ret_rates = 0, bit;
1870         int i;
1871         u8 *cnt = ie;
1872         u8 *rates = ie + 1;
1873
1874         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1875                 if (bit & supported_rate) {
1876                         ret_rates |= bit;
1877                         rates[*cnt] = iwl4965_rates[i].ieee |
1878                                 ((bit & basic_rate) ? 0x80 : 0x00);
1879                         (*cnt)++;
1880                         (*left)--;
1881                         if ((*left <= 0) ||
1882                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1883                                 break;
1884                 }
1885         }
1886
1887         return ret_rates;
1888 }
1889
1890 #ifdef CONFIG_IWL4965_HT
1891 void static iwl4965_set_ht_capab(struct ieee80211_hw *hw,
1892                              struct ieee80211_ht_cap *ht_cap,
1893                              u8 use_current_config);
1894 #endif
1895
1896 /**
1897  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1898  */
1899 static u16 iwl4965_fill_probe_req(struct iwl4965_priv *priv,
1900                               struct ieee80211_mgmt *frame,
1901                               int left, int is_direct)
1902 {
1903         int len = 0;
1904         u8 *pos = NULL;
1905         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1906 #ifdef CONFIG_IWL4965_HT
1907         struct ieee80211_hw_mode *mode;
1908 #endif /* CONFIG_IWL4965_HT */
1909
1910         /* Make sure there is enough space for the probe request,
1911          * two mandatory IEs and the data */
1912         left -= 24;
1913         if (left < 0)
1914                 return 0;
1915         len += 24;
1916
1917         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1918         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1919         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1920         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1921         frame->seq_ctrl = 0;
1922
1923         /* fill in our indirect SSID IE */
1924         /* ...next IE... */
1925
1926         left -= 2;
1927         if (left < 0)
1928                 return 0;
1929         len += 2;
1930         pos = &(frame->u.probe_req.variable[0]);
1931         *pos++ = WLAN_EID_SSID;
1932         *pos++ = 0;
1933
1934         /* fill in our direct SSID IE... */
1935         if (is_direct) {
1936                 /* ...next IE... */
1937                 left -= 2 + priv->essid_len;
1938                 if (left < 0)
1939                         return 0;
1940                 /* ... fill it in... */
1941                 *pos++ = WLAN_EID_SSID;
1942                 *pos++ = priv->essid_len;
1943                 memcpy(pos, priv->essid, priv->essid_len);
1944                 pos += priv->essid_len;
1945                 len += 2 + priv->essid_len;
1946         }
1947
1948         /* fill in supported rate */
1949         /* ...next IE... */
1950         left -= 2;
1951         if (left < 0)
1952                 return 0;
1953
1954         /* ... fill it in... */
1955         *pos++ = WLAN_EID_SUPP_RATES;
1956         *pos = 0;
1957
1958         /* exclude 60M rate */
1959         active_rates = priv->rates_mask;
1960         active_rates &= ~IWL_RATE_60M_MASK;
1961
1962         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1963
1964         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1965         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1966                         active_rate_basic, &left);
1967         active_rates &= ~ret_rates;
1968
1969         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1970                                  active_rate_basic, &left);
1971         active_rates &= ~ret_rates;
1972
1973         len += 2 + *pos;
1974         pos += (*pos) + 1;
1975         if (active_rates == 0)
1976                 goto fill_end;
1977
1978         /* fill in supported extended rate */
1979         /* ...next IE... */
1980         left -= 2;
1981         if (left < 0)
1982                 return 0;
1983         /* ... fill it in... */
1984         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1985         *pos = 0;
1986         iwl4965_supported_rate_to_ie(pos, active_rates,
1987                                  active_rate_basic, &left);
1988         if (*pos > 0)
1989                 len += 2 + *pos;
1990
1991 #ifdef CONFIG_IWL4965_HT
1992         mode = priv->hw->conf.mode;
1993         if (mode->ht_info.ht_supported) {
1994                 pos += (*pos) + 1;
1995                 *pos++ = WLAN_EID_HT_CAPABILITY;
1996                 *pos++ = sizeof(struct ieee80211_ht_cap);
1997                 iwl4965_set_ht_capab(priv->hw,
1998                                 (struct ieee80211_ht_cap *)pos, 0);
1999                 len += 2 + sizeof(struct ieee80211_ht_cap);
2000         }
2001 #endif  /*CONFIG_IWL4965_HT */
2002
2003  fill_end:
2004         return (u16)len;
2005 }
2006
2007 /*
2008  * QoS  support
2009 */
2010 #ifdef CONFIG_IWL4965_QOS
2011 static int iwl4965_send_qos_params_command(struct iwl4965_priv *priv,
2012                                        struct iwl4965_qosparam_cmd *qos)
2013 {
2014
2015         return iwl4965_send_cmd_pdu(priv, REPLY_QOS_PARAM,
2016                                 sizeof(struct iwl4965_qosparam_cmd), qos);
2017 }
2018
2019 static void iwl4965_reset_qos(struct iwl4965_priv *priv)
2020 {
2021         u16 cw_min = 15;
2022         u16 cw_max = 1023;
2023         u8 aifs = 2;
2024         u8 is_legacy = 0;
2025         unsigned long flags;
2026         int i;
2027
2028         spin_lock_irqsave(&priv->lock, flags);
2029         priv->qos_data.qos_active = 0;
2030
2031         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
2032                 if (priv->qos_data.qos_enable)
2033                         priv->qos_data.qos_active = 1;
2034                 if (!(priv->active_rate & 0xfff0)) {
2035                         cw_min = 31;
2036                         is_legacy = 1;
2037                 }
2038         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2039                 if (priv->qos_data.qos_enable)
2040                         priv->qos_data.qos_active = 1;
2041         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
2042                 cw_min = 31;
2043                 is_legacy = 1;
2044         }
2045
2046         if (priv->qos_data.qos_active)
2047                 aifs = 3;
2048
2049         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
2050         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
2051         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
2052         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
2053         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
2054
2055         if (priv->qos_data.qos_active) {
2056                 i = 1;
2057                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
2058                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
2059                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
2060                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2061                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2062
2063                 i = 2;
2064                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2065                         cpu_to_le16((cw_min + 1) / 2 - 1);
2066                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2067                         cpu_to_le16(cw_max);
2068                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2069                 if (is_legacy)
2070                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2071                                 cpu_to_le16(6016);
2072                 else
2073                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2074                                 cpu_to_le16(3008);
2075                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2076
2077                 i = 3;
2078                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2079                         cpu_to_le16((cw_min + 1) / 4 - 1);
2080                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2081                         cpu_to_le16((cw_max + 1) / 2 - 1);
2082                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2083                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2084                 if (is_legacy)
2085                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2086                                 cpu_to_le16(3264);
2087                 else
2088                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2089                                 cpu_to_le16(1504);
2090         } else {
2091                 for (i = 1; i < 4; i++) {
2092                         priv->qos_data.def_qos_parm.ac[i].cw_min =
2093                                 cpu_to_le16(cw_min);
2094                         priv->qos_data.def_qos_parm.ac[i].cw_max =
2095                                 cpu_to_le16(cw_max);
2096                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2097                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2098                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2099                 }
2100         }
2101         IWL_DEBUG_QOS("set QoS to default \n");
2102
2103         spin_unlock_irqrestore(&priv->lock, flags);
2104 }
2105
2106 static void iwl4965_activate_qos(struct iwl4965_priv *priv, u8 force)
2107 {
2108         unsigned long flags;
2109
2110         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2111                 return;
2112
2113         if (!priv->qos_data.qos_enable)
2114                 return;
2115
2116         spin_lock_irqsave(&priv->lock, flags);
2117         priv->qos_data.def_qos_parm.qos_flags = 0;
2118
2119         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2120             !priv->qos_data.qos_cap.q_AP.txop_request)
2121                 priv->qos_data.def_qos_parm.qos_flags |=
2122                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2123         if (priv->qos_data.qos_active)
2124                 priv->qos_data.def_qos_parm.qos_flags |=
2125                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2126
2127 #ifdef CONFIG_IWL4965_HT
2128         if (priv->current_ht_config.is_ht)
2129                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2130 #endif /* CONFIG_IWL4965_HT */
2131
2132         spin_unlock_irqrestore(&priv->lock, flags);
2133
2134         if (force || iwl4965_is_associated(priv)) {
2135                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2136                                 priv->qos_data.qos_active,
2137                                 priv->qos_data.def_qos_parm.qos_flags);
2138
2139                 iwl4965_send_qos_params_command(priv,
2140                                 &(priv->qos_data.def_qos_parm));
2141         }
2142 }
2143
2144 #endif /* CONFIG_IWL4965_QOS */
2145 /*
2146  * Power management (not Tx power!) functions
2147  */
2148 #define MSEC_TO_USEC 1024
2149
2150 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2151 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2152 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2153 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2154                                      __constant_cpu_to_le32(X1), \
2155                                      __constant_cpu_to_le32(X2), \
2156                                      __constant_cpu_to_le32(X3), \
2157                                      __constant_cpu_to_le32(X4)}
2158
2159
2160 /* default power management (not Tx power) table values */
2161 /* for tim  0-10 */
2162 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
2163         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2164         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2165         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2166         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2167         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2168         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2169 };
2170
2171 /* for tim > 10 */
2172 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
2173         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2174         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2175                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2176         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2177                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2178         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2179                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2180         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2181         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2182                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2183 };
2184
2185 int iwl4965_power_init_handle(struct iwl4965_priv *priv)
2186 {
2187         int rc = 0, i;
2188         struct iwl4965_power_mgr *pow_data;
2189         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
2190         u16 pci_pm;
2191
2192         IWL_DEBUG_POWER("Initialize power \n");
2193
2194         pow_data = &(priv->power_data);
2195
2196         memset(pow_data, 0, sizeof(*pow_data));
2197
2198         pow_data->active_index = IWL_POWER_RANGE_0;
2199         pow_data->dtim_val = 0xffff;
2200
2201         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2202         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2203
2204         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2205         if (rc != 0)
2206                 return 0;
2207         else {
2208                 struct iwl4965_powertable_cmd *cmd;
2209
2210                 IWL_DEBUG_POWER("adjust power command flags\n");
2211
2212                 for (i = 0; i < IWL_POWER_AC; i++) {
2213                         cmd = &pow_data->pwr_range_0[i].cmd;
2214
2215                         if (pci_pm & 0x1)
2216                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2217                         else
2218                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2219                 }
2220         }
2221         return rc;
2222 }
2223
2224 static int iwl4965_update_power_cmd(struct iwl4965_priv *priv,
2225                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
2226 {
2227         int rc = 0, i;
2228         u8 skip;
2229         u32 max_sleep = 0;
2230         struct iwl4965_power_vec_entry *range;
2231         u8 period = 0;
2232         struct iwl4965_power_mgr *pow_data;
2233
2234         if (mode > IWL_POWER_INDEX_5) {
2235                 IWL_DEBUG_POWER("Error invalid power mode \n");
2236                 return -1;
2237         }
2238         pow_data = &(priv->power_data);
2239
2240         if (pow_data->active_index == IWL_POWER_RANGE_0)
2241                 range = &pow_data->pwr_range_0[0];
2242         else
2243                 range = &pow_data->pwr_range_1[1];
2244
2245         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
2246
2247 #ifdef IWL_MAC80211_DISABLE
2248         if (priv->assoc_network != NULL) {
2249                 unsigned long flags;
2250
2251                 period = priv->assoc_network->tim.tim_period;
2252         }
2253 #endif  /*IWL_MAC80211_DISABLE */
2254         skip = range[mode].no_dtim;
2255
2256         if (period == 0) {
2257                 period = 1;
2258                 skip = 0;
2259         }
2260
2261         if (skip == 0) {
2262                 max_sleep = period;
2263                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2264         } else {
2265                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2266                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2267                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2268         }
2269
2270         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2271                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2272                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2273         }
2274
2275         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2276         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2277         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2278         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2279                         le32_to_cpu(cmd->sleep_interval[0]),
2280                         le32_to_cpu(cmd->sleep_interval[1]),
2281                         le32_to_cpu(cmd->sleep_interval[2]),
2282                         le32_to_cpu(cmd->sleep_interval[3]),
2283                         le32_to_cpu(cmd->sleep_interval[4]));
2284
2285         return rc;
2286 }
2287
2288 static int iwl4965_send_power_mode(struct iwl4965_priv *priv, u32 mode)
2289 {
2290         u32 uninitialized_var(final_mode);
2291         int rc;
2292         struct iwl4965_powertable_cmd cmd;
2293
2294         /* If on battery, set to 3,
2295          * if plugged into AC power, set to CAM ("continuously aware mode"),
2296          * else user level */
2297         switch (mode) {
2298         case IWL_POWER_BATTERY:
2299                 final_mode = IWL_POWER_INDEX_3;
2300                 break;
2301         case IWL_POWER_AC:
2302                 final_mode = IWL_POWER_MODE_CAM;
2303                 break;
2304         default:
2305                 final_mode = mode;
2306                 break;
2307         }
2308
2309         cmd.keep_alive_beacons = 0;
2310
2311         iwl4965_update_power_cmd(priv, &cmd, final_mode);
2312
2313         rc = iwl4965_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2314
2315         if (final_mode == IWL_POWER_MODE_CAM)
2316                 clear_bit(STATUS_POWER_PMI, &priv->status);
2317         else
2318                 set_bit(STATUS_POWER_PMI, &priv->status);
2319
2320         return rc;
2321 }
2322
2323 int iwl4965_is_network_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
2324 {
2325         /* Filter incoming packets to determine if they are targeted toward
2326          * this network, discarding packets coming from ourselves */
2327         switch (priv->iw_mode) {
2328         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2329                 /* packets from our adapter are dropped (echo) */
2330                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2331                         return 0;
2332                 /* {broad,multi}cast packets to our IBSS go through */
2333                 if (is_multicast_ether_addr(header->addr1))
2334                         return !compare_ether_addr(header->addr3, priv->bssid);
2335                 /* packets to our adapter go through */
2336                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2337         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2338                 /* packets from our adapter are dropped (echo) */
2339                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2340                         return 0;
2341                 /* {broad,multi}cast packets to our BSS go through */
2342                 if (is_multicast_ether_addr(header->addr1))
2343                         return !compare_ether_addr(header->addr2, priv->bssid);
2344                 /* packets to our adapter go through */
2345                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2346         }
2347
2348         return 1;
2349 }
2350
2351 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2352
2353 static const char *iwl4965_get_tx_fail_reason(u32 status)
2354 {
2355         switch (status & TX_STATUS_MSK) {
2356         case TX_STATUS_SUCCESS:
2357                 return "SUCCESS";
2358                 TX_STATUS_ENTRY(SHORT_LIMIT);
2359                 TX_STATUS_ENTRY(LONG_LIMIT);
2360                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2361                 TX_STATUS_ENTRY(MGMNT_ABORT);
2362                 TX_STATUS_ENTRY(NEXT_FRAG);
2363                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2364                 TX_STATUS_ENTRY(DEST_PS);
2365                 TX_STATUS_ENTRY(ABORTED);
2366                 TX_STATUS_ENTRY(BT_RETRY);
2367                 TX_STATUS_ENTRY(STA_INVALID);
2368                 TX_STATUS_ENTRY(FRAG_DROPPED);
2369                 TX_STATUS_ENTRY(TID_DISABLE);
2370                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2371                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2372                 TX_STATUS_ENTRY(TX_LOCKED);
2373                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2374         }
2375
2376         return "UNKNOWN";
2377 }
2378
2379 /**
2380  * iwl4965_scan_cancel - Cancel any currently executing HW scan
2381  *
2382  * NOTE: priv->mutex is not required before calling this function
2383  */
2384 static int iwl4965_scan_cancel(struct iwl4965_priv *priv)
2385 {
2386         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2387                 clear_bit(STATUS_SCANNING, &priv->status);
2388                 return 0;
2389         }
2390
2391         if (test_bit(STATUS_SCANNING, &priv->status)) {
2392                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2393                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2394                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2395                         queue_work(priv->workqueue, &priv->abort_scan);
2396
2397                 } else
2398                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2399
2400                 return test_bit(STATUS_SCANNING, &priv->status);
2401         }
2402
2403         return 0;
2404 }
2405
2406 /**
2407  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
2408  * @ms: amount of time to wait (in milliseconds) for scan to abort
2409  *
2410  * NOTE: priv->mutex must be held before calling this function
2411  */
2412 static int iwl4965_scan_cancel_timeout(struct iwl4965_priv *priv, unsigned long ms)
2413 {
2414         unsigned long now = jiffies;
2415         int ret;
2416
2417         ret = iwl4965_scan_cancel(priv);
2418         if (ret && ms) {
2419                 mutex_unlock(&priv->mutex);
2420                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2421                                 test_bit(STATUS_SCANNING, &priv->status))
2422                         msleep(1);
2423                 mutex_lock(&priv->mutex);
2424
2425                 return test_bit(STATUS_SCANNING, &priv->status);
2426         }
2427
2428         return ret;
2429 }
2430
2431 static void iwl4965_sequence_reset(struct iwl4965_priv *priv)
2432 {
2433         /* Reset ieee stats */
2434
2435         /* We don't reset the net_device_stats (ieee->stats) on
2436          * re-association */
2437
2438         priv->last_seq_num = -1;
2439         priv->last_frag_num = -1;
2440         priv->last_packet_time = 0;
2441
2442         iwl4965_scan_cancel(priv);
2443 }
2444
2445 #define MAX_UCODE_BEACON_INTERVAL       4096
2446 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2447
2448 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
2449 {
2450         u16 new_val = 0;
2451         u16 beacon_factor = 0;
2452
2453         beacon_factor =
2454             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2455                 / MAX_UCODE_BEACON_INTERVAL;
2456         new_val = beacon_val / beacon_factor;
2457
2458         return cpu_to_le16(new_val);
2459 }
2460
2461 static void iwl4965_setup_rxon_timing(struct iwl4965_priv *priv)
2462 {
2463         u64 interval_tm_unit;
2464         u64 tsf, result;
2465         unsigned long flags;
2466         struct ieee80211_conf *conf = NULL;
2467         u16 beacon_int = 0;
2468
2469         conf = ieee80211_get_hw_conf(priv->hw);
2470
2471         spin_lock_irqsave(&priv->lock, flags);
2472         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2473         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2474
2475         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2476
2477         tsf = priv->timestamp1;
2478         tsf = ((tsf << 32) | priv->timestamp0);
2479
2480         beacon_int = priv->beacon_int;
2481         spin_unlock_irqrestore(&priv->lock, flags);
2482
2483         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2484                 if (beacon_int == 0) {
2485                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2486                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2487                 } else {
2488                         priv->rxon_timing.beacon_interval =
2489                                 cpu_to_le16(beacon_int);
2490                         priv->rxon_timing.beacon_interval =
2491                             iwl4965_adjust_beacon_interval(
2492                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2493                 }
2494
2495                 priv->rxon_timing.atim_window = 0;
2496         } else {
2497                 priv->rxon_timing.beacon_interval =
2498                         iwl4965_adjust_beacon_interval(conf->beacon_int);
2499                 /* TODO: we need to get atim_window from upper stack
2500                  * for now we set to 0 */
2501                 priv->rxon_timing.atim_window = 0;
2502         }
2503
2504         interval_tm_unit =
2505                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2506         result = do_div(tsf, interval_tm_unit);
2507         priv->rxon_timing.beacon_init_val =
2508             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2509
2510         IWL_DEBUG_ASSOC
2511             ("beacon interval %d beacon timer %d beacon tim %d\n",
2512                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2513                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2514                 le16_to_cpu(priv->rxon_timing.atim_window));
2515 }
2516
2517 static int iwl4965_scan_initiate(struct iwl4965_priv *priv)
2518 {
2519         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2520                 IWL_ERROR("APs don't scan.\n");
2521                 return 0;
2522         }
2523
2524         if (!iwl4965_is_ready_rf(priv)) {
2525                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2526                 return -EIO;
2527         }
2528
2529         if (test_bit(STATUS_SCANNING, &priv->status)) {
2530                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2531                 return -EAGAIN;
2532         }
2533
2534         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2535                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2536                                "Queuing.\n");
2537                 return -EAGAIN;
2538         }
2539
2540         IWL_DEBUG_INFO("Starting scan...\n");
2541         priv->scan_bands = 2;
2542         set_bit(STATUS_SCANNING, &priv->status);
2543         priv->scan_start = jiffies;
2544         priv->scan_pass_start = priv->scan_start;
2545
2546         queue_work(priv->workqueue, &priv->request_scan);
2547
2548         return 0;
2549 }
2550
2551 static int iwl4965_set_rxon_hwcrypto(struct iwl4965_priv *priv, int hw_decrypt)
2552 {
2553         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
2554
2555         if (hw_decrypt)
2556                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2557         else
2558                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2559
2560         return 0;
2561 }
2562
2563 static void iwl4965_set_flags_for_phymode(struct iwl4965_priv *priv, u8 phymode)
2564 {
2565         if (phymode == MODE_IEEE80211A) {
2566                 priv->staging_rxon.flags &=
2567                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2568                       | RXON_FLG_CCK_MSK);
2569                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2570         } else {
2571                 /* Copied from iwl4965_bg_post_associate() */
2572                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2573                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2574                 else
2575                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2576
2577                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2578                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2579
2580                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2581                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2582                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2583         }
2584 }
2585
2586 /*
2587  * initialize rxon structure with default values from eeprom
2588  */
2589 static void iwl4965_connection_init_rx_config(struct iwl4965_priv *priv)
2590 {
2591         const struct iwl4965_channel_info *ch_info;
2592
2593         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2594
2595         switch (priv->iw_mode) {
2596         case IEEE80211_IF_TYPE_AP:
2597                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2598                 break;
2599
2600         case IEEE80211_IF_TYPE_STA:
2601                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2602                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2603                 break;
2604
2605         case IEEE80211_IF_TYPE_IBSS:
2606                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2607                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2608                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2609                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2610                 break;
2611
2612         case IEEE80211_IF_TYPE_MNTR:
2613                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2614                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2615                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2616                 break;
2617         }
2618
2619 #if 0
2620         /* TODO:  Figure out when short_preamble would be set and cache from
2621          * that */
2622         if (!hw_to_local(priv->hw)->short_preamble)
2623                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2624         else
2625                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2626 #endif
2627
2628         ch_info = iwl4965_get_channel_info(priv, priv->phymode,
2629                                        le16_to_cpu(priv->staging_rxon.channel));
2630
2631         if (!ch_info)
2632                 ch_info = &priv->channel_info[0];
2633
2634         /*
2635          * in some case A channels are all non IBSS
2636          * in this case force B/G channel
2637          */
2638         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2639             !(is_channel_ibss(ch_info)))
2640                 ch_info = &priv->channel_info[0];
2641
2642         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2643         if (is_channel_a_band(ch_info))
2644                 priv->phymode = MODE_IEEE80211A;
2645         else
2646                 priv->phymode = MODE_IEEE80211G;
2647
2648         iwl4965_set_flags_for_phymode(priv, priv->phymode);
2649
2650         priv->staging_rxon.ofdm_basic_rates =
2651             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2652         priv->staging_rxon.cck_basic_rates =
2653             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2654
2655         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2656                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2657         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2658         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2659         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2660         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2661         iwl4965_set_rxon_chain(priv);
2662 }
2663
2664 static int iwl4965_set_mode(struct iwl4965_priv *priv, int mode)
2665 {
2666         if (mode == IEEE80211_IF_TYPE_IBSS) {
2667                 const struct iwl4965_channel_info *ch_info;
2668
2669                 ch_info = iwl4965_get_channel_info(priv,
2670                         priv->phymode,
2671                         le16_to_cpu(priv->staging_rxon.channel));
2672
2673                 if (!ch_info || !is_channel_ibss(ch_info)) {
2674                         IWL_ERROR("channel %d not IBSS channel\n",
2675                                   le16_to_cpu(priv->staging_rxon.channel));
2676                         return -EINVAL;
2677                 }
2678         }
2679
2680         priv->iw_mode = mode;
2681
2682         iwl4965_connection_init_rx_config(priv);
2683         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2684
2685         iwl4965_clear_stations_table(priv);
2686
2687         /* dont commit rxon if rf-kill is on*/
2688         if (!iwl4965_is_ready_rf(priv))
2689                 return -EAGAIN;
2690
2691         cancel_delayed_work(&priv->scan_check);
2692         if (iwl4965_scan_cancel_timeout(priv, 100)) {
2693                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2694                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2695                 return -EAGAIN;
2696         }
2697
2698         iwl4965_commit_rxon(priv);
2699
2700         return 0;
2701 }
2702
2703 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl4965_priv *priv,
2704                                       struct ieee80211_tx_control *ctl,
2705                                       struct iwl4965_cmd *cmd,
2706                                       struct sk_buff *skb_frag,
2707                                       int last_frag)
2708 {
2709         struct iwl4965_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2710
2711         switch (keyinfo->alg) {
2712         case ALG_CCMP:
2713                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2714                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2715                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2716                 break;
2717
2718         case ALG_TKIP:
2719 #if 0
2720                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2721
2722                 if (last_frag)
2723                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2724                                8);
2725                 else
2726                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2727 #endif
2728                 break;
2729
2730         case ALG_WEP:
2731                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2732                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2733
2734                 if (keyinfo->keylen == 13)
2735                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2736
2737                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2738
2739                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2740                              "with key %d\n", ctl->key_idx);
2741                 break;
2742
2743         default:
2744                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2745                 break;
2746         }
2747 }
2748
2749 /*
2750  * handle build REPLY_TX command notification.
2751  */
2752 static void iwl4965_build_tx_cmd_basic(struct iwl4965_priv *priv,
2753                                   struct iwl4965_cmd *cmd,
2754                                   struct ieee80211_tx_control *ctrl,
2755                                   struct ieee80211_hdr *hdr,
2756                                   int is_unicast, u8 std_id)
2757 {
2758         __le16 *qc;
2759         u16 fc = le16_to_cpu(hdr->frame_control);
2760         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2761
2762         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2763         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2764                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2765                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2766                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2767                 if (ieee80211_is_probe_response(fc) &&
2768                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2769                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2770         } else {
2771                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2772                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2773         }
2774
2775         if (ieee80211_is_back_request(fc))
2776                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2777
2778
2779         cmd->cmd.tx.sta_id = std_id;
2780         if (ieee80211_get_morefrag(hdr))
2781                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2782
2783         qc = ieee80211_get_qos_ctrl(hdr);
2784         if (qc) {
2785                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2786                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2787         } else
2788                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2789
2790         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2791                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2792                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2793         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2794                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2795                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2796         }
2797
2798         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2799                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2800
2801         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2802         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2803                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2804                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2805                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2806                 else
2807                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2808         } else
2809                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2810
2811         cmd->cmd.tx.driver_txop = 0;
2812         cmd->cmd.tx.tx_flags = tx_flags;
2813         cmd->cmd.tx.next_frame_len = 0;
2814 }
2815
2816 /**
2817  * iwl4965_get_sta_id - Find station's index within station table
2818  *
2819  * If new IBSS station, create new entry in station table
2820  */
2821 static int iwl4965_get_sta_id(struct iwl4965_priv *priv,
2822                                 struct ieee80211_hdr *hdr)
2823 {
2824         int sta_id;
2825         u16 fc = le16_to_cpu(hdr->frame_control);
2826         DECLARE_MAC_BUF(mac);
2827
2828         /* If this frame is broadcast or management, use broadcast station id */
2829         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2830             is_multicast_ether_addr(hdr->addr1))
2831                 return priv->hw_setting.bcast_sta_id;
2832
2833         switch (priv->iw_mode) {
2834
2835         /* If we are a client station in a BSS network, use the special
2836          * AP station entry (that's the only station we communicate with) */
2837         case IEEE80211_IF_TYPE_STA:
2838                 return IWL_AP_ID;
2839
2840         /* If we are an AP, then find the station, or use BCAST */
2841         case IEEE80211_IF_TYPE_AP:
2842                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2843                 if (sta_id != IWL_INVALID_STATION)
2844                         return sta_id;
2845                 return priv->hw_setting.bcast_sta_id;
2846
2847         /* If this frame is going out to an IBSS network, find the station,
2848          * or create a new station table entry */
2849         case IEEE80211_IF_TYPE_IBSS:
2850                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2851                 if (sta_id != IWL_INVALID_STATION)
2852                         return sta_id;
2853
2854                 /* Create new station table entry */
2855                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2856                                                    0, CMD_ASYNC, NULL);
2857
2858                 if (sta_id != IWL_INVALID_STATION)
2859                         return sta_id;
2860
2861                 IWL_DEBUG_DROP("Station %s not in station map. "
2862                                "Defaulting to broadcast...\n",
2863                                print_mac(mac, hdr->addr1));
2864                 iwl4965_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2865                 return priv->hw_setting.bcast_sta_id;
2866
2867         default:
2868                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2869                 return priv->hw_setting.bcast_sta_id;
2870         }
2871 }
2872
2873 /*
2874  * start REPLY_TX command process
2875  */
2876 static int iwl4965_tx_skb(struct iwl4965_priv *priv,
2877                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2878 {
2879         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2880         struct iwl4965_tfd_frame *tfd;
2881         u32 *control_flags;
2882         int txq_id = ctl->queue;
2883         struct iwl4965_tx_queue *txq = NULL;
2884         struct iwl4965_queue *q = NULL;
2885         dma_addr_t phys_addr;
2886         dma_addr_t txcmd_phys;
2887         dma_addr_t scratch_phys;
2888         struct iwl4965_cmd *out_cmd = NULL;
2889         u16 len, idx, len_org;
2890         u8 id, hdr_len, unicast;
2891         u8 sta_id;
2892         u16 seq_number = 0;
2893         u16 fc;
2894         __le16 *qc;
2895         u8 wait_write_ptr = 0;
2896         unsigned long flags;
2897         int rc;
2898
2899         spin_lock_irqsave(&priv->lock, flags);
2900         if (iwl4965_is_rfkill(priv)) {
2901                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2902                 goto drop_unlock;
2903         }
2904
2905         if (!priv->vif) {
2906                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2907                 goto drop_unlock;
2908         }
2909
2910         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2911                 IWL_ERROR("ERROR: No TX rate available.\n");
2912                 goto drop_unlock;
2913         }
2914
2915         unicast = !is_multicast_ether_addr(hdr->addr1);
2916         id = 0;
2917
2918         fc = le16_to_cpu(hdr->frame_control);
2919
2920 #ifdef CONFIG_IWL4965_DEBUG
2921         if (ieee80211_is_auth(fc))
2922                 IWL_DEBUG_TX("Sending AUTH frame\n");
2923         else if (ieee80211_is_assoc_request(fc))
2924                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2925         else if (ieee80211_is_reassoc_request(fc))
2926                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2927 #endif
2928
2929         /* drop all data frame if we are not associated */
2930         if (!iwl4965_is_associated(priv) && !priv->assoc_id &&
2931             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2932                 IWL_DEBUG_DROP("Dropping - !iwl4965_is_associated\n");
2933                 goto drop_unlock;
2934         }
2935
2936         spin_unlock_irqrestore(&priv->lock, flags);
2937
2938         hdr_len = ieee80211_get_hdrlen(fc);
2939
2940         /* Find (or create) index into station table for destination station */
2941         sta_id = iwl4965_get_sta_id(priv, hdr);
2942         if (sta_id == IWL_INVALID_STATION) {
2943                 DECLARE_MAC_BUF(mac);
2944
2945                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2946                                print_mac(mac, hdr->addr1));
2947                 goto drop;
2948         }
2949
2950         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2951
2952         qc = ieee80211_get_qos_ctrl(hdr);
2953         if (qc) {
2954                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2955                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2956                                 IEEE80211_SCTL_SEQ;
2957                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2958                         (hdr->seq_ctrl &
2959                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2960                 seq_number += 0x10;
2961 #ifdef CONFIG_IWL4965_HT
2962 #ifdef CONFIG_IWL4965_HT_AGG
2963                 /* aggregation is on for this <sta,tid> */
2964                 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2965                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2966 #endif /* CONFIG_IWL4965_HT_AGG */
2967 #endif /* CONFIG_IWL4965_HT */
2968         }
2969
2970         /* Descriptor for chosen Tx queue */
2971         txq = &priv->txq[txq_id];
2972         q = &txq->q;
2973
2974         spin_lock_irqsave(&priv->lock, flags);
2975
2976         /* Set up first empty TFD within this queue's circular TFD buffer */
2977         tfd = &txq->bd[q->write_ptr];
2978         memset(tfd, 0, sizeof(*tfd));
2979         control_flags = (u32 *) tfd;
2980         idx = get_cmd_index(q, q->write_ptr, 0);
2981
2982         /* Set up driver data for this TFD */
2983         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2984         txq->txb[q->write_ptr].skb[0] = skb;
2985         memcpy(&(txq->txb[q->write_ptr].status.control),
2986                ctl, sizeof(struct ieee80211_tx_control));
2987
2988         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2989         out_cmd = &txq->cmd[idx];
2990         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2991         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2992
2993         /*
2994          * Set up the Tx-command (not MAC!) header.
2995          * Store the chosen Tx queue and TFD index within the sequence field;
2996          * after Tx, uCode's Tx response will return this value so driver can
2997          * locate the frame within the tx queue and do post-tx processing.
2998          */
2999         out_cmd->hdr.cmd = REPLY_TX;
3000         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
3001                                 INDEX_TO_SEQ(q->write_ptr)));
3002
3003         /* Copy MAC header from skb into command buffer */
3004         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
3005
3006         /*
3007          * Use the first empty entry in this queue's command buffer array
3008          * to contain the Tx command and MAC header concatenated together
3009          * (payload data will be in another buffer).
3010          * Size of this varies, due to varying MAC header length.
3011          * If end is not dword aligned, we'll have 2 extra bytes at the end
3012          * of the MAC header (device reads on dword boundaries).
3013          * We'll tell device about this padding later.
3014          */
3015         len = priv->hw_setting.tx_cmd_len +
3016                 sizeof(struct iwl4965_cmd_header) + hdr_len;
3017
3018         len_org = len;
3019         len = (len + 3) & ~3;
3020
3021         if (len_org != len)
3022                 len_org = 1;
3023         else
3024                 len_org = 0;
3025
3026         /* Physical address of this Tx command's header (not MAC header!),
3027          * within command buffer array. */
3028         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl4965_cmd) * idx +
3029                      offsetof(struct iwl4965_cmd, hdr);
3030
3031         /* Add buffer containing Tx command and MAC(!) header to TFD's
3032          * first entry */
3033         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
3034
3035         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
3036                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
3037
3038         /* Set up TFD's 2nd entry to point directly to remainder of skb,
3039          * if any (802.11 null frames have no payload). */
3040         len = skb->len - hdr_len;
3041         if (len) {
3042                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
3043                                            len, PCI_DMA_TODEVICE);
3044                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
3045         }
3046
3047         /* Tell 4965 about any 2-byte padding after MAC header */
3048         if (len_org)
3049                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
3050
3051         /* Total # bytes to be transmitted */
3052         len = (u16)skb->len;
3053         out_cmd->cmd.tx.len = cpu_to_le16(len);
3054
3055         /* TODO need this for burst mode later on */
3056         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
3057
3058         /* set is_hcca to 0; it probably will never be implemented */
3059         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
3060
3061         scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
3062                 offsetof(struct iwl4965_tx_cmd, scratch);
3063         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
3064         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
3065
3066 #ifdef CONFIG_IWL4965_HT_AGG
3067 #ifdef CONFIG_IWL4965_HT
3068         /* TODO: move this functionality to rate scaling */
3069         iwl4965_tl_get_stats(priv, hdr);
3070 #endif /* CONFIG_IWL4965_HT_AGG */
3071 #endif /*CONFIG_IWL4965_HT */
3072
3073
3074         if (!ieee80211_get_morefrag(hdr)) {
3075                 txq->need_update = 1;
3076                 if (qc) {
3077                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
3078                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
3079                 }
3080         } else {
3081                 wait_write_ptr = 1;
3082                 txq->need_update = 0;
3083         }
3084
3085         iwl4965_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
3086                            sizeof(out_cmd->cmd.tx));
3087
3088         iwl4965_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
3089                            ieee80211_get_hdrlen(fc));
3090
3091         /* Set up entry for this TFD in Tx byte-count array */
3092         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
3093
3094         /* Tell device the write index *just past* this latest filled TFD */
3095         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
3096         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
3097         spin_unlock_irqrestore(&priv->lock, flags);
3098
3099         if (rc)
3100                 return rc;
3101
3102         if ((iwl4965_queue_space(q) < q->high_mark)
3103             && priv->mac80211_registered) {
3104                 if (wait_write_ptr) {
3105                         spin_lock_irqsave(&priv->lock, flags);
3106                         txq->need_update = 1;
3107                         iwl4965_tx_queue_update_write_ptr(priv, txq);
3108                         spin_unlock_irqrestore(&priv->lock, flags);
3109                 }
3110
3111                 ieee80211_stop_queue(priv->hw, ctl->queue);
3112         }
3113
3114         return 0;
3115
3116 drop_unlock:
3117         spin_unlock_irqrestore(&priv->lock, flags);
3118 drop:
3119         return -1;
3120 }
3121
3122 static void iwl4965_set_rate(struct iwl4965_priv *priv)
3123 {
3124         const struct ieee80211_hw_mode *hw = NULL;
3125         struct ieee80211_rate *rate;
3126         int i;
3127
3128         hw = iwl4965_get_hw_mode(priv, priv->phymode);
3129         if (!hw) {
3130                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
3131                 return;
3132         }
3133
3134         priv->active_rate = 0;
3135         priv->active_rate_basic = 0;
3136
3137         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3138                        hw->mode == MODE_IEEE80211A ?
3139                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3140
3141         for (i = 0; i < hw->num_rates; i++) {
3142                 rate = &(hw->rates[i]);
3143                 if ((rate->val < IWL_RATE_COUNT) &&
3144                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3145                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3146                                        rate->val, iwl4965_rates[rate->val].plcp,
3147                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3148                                        "*" : "");
3149                         priv->active_rate |= (1 << rate->val);
3150                         if (rate->flags & IEEE80211_RATE_BASIC)
3151                                 priv->active_rate_basic |= (1 << rate->val);
3152                 } else
3153                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3154                                        rate->val, iwl4965_rates[rate->val].plcp);
3155         }
3156
3157         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3158                        priv->active_rate, priv->active_rate_basic);
3159
3160         /*
3161          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3162          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3163          * OFDM
3164          */
3165         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3166                 priv->staging_rxon.cck_basic_rates =
3167                     ((priv->active_rate_basic &
3168                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3169         else
3170                 priv->staging_rxon.cck_basic_rates =
3171                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3172
3173         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3174                 priv->staging_rxon.ofdm_basic_rates =
3175                     ((priv->active_rate_basic &
3176                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3177                       IWL_FIRST_OFDM_RATE) & 0xFF;
3178         else
3179                 priv->staging_rxon.ofdm_basic_rates =
3180                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3181 }
3182
3183 static void iwl4965_radio_kill_sw(struct iwl4965_priv *priv, int disable_radio)
3184 {
3185         unsigned long flags;
3186
3187         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3188                 return;
3189
3190         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3191                           disable_radio ? "OFF" : "ON");
3192
3193         if (disable_radio) {
3194                 iwl4965_scan_cancel(priv);
3195                 /* FIXME: This is a workaround for AP */
3196                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3197                         spin_lock_irqsave(&priv->lock, flags);
3198                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3199                                     CSR_UCODE_SW_BIT_RFKILL);
3200                         spin_unlock_irqrestore(&priv->lock, flags);
3201                         iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3202                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3203                 }
3204                 return;
3205         }
3206
3207         spin_lock_irqsave(&priv->lock, flags);
3208         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3209
3210         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3211         spin_unlock_irqrestore(&priv->lock, flags);
3212
3213         /* wake up ucode */
3214         msleep(10);
3215
3216         spin_lock_irqsave(&priv->lock, flags);
3217         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
3218         if (!iwl4965_grab_nic_access(priv))
3219                 iwl4965_release_nic_access(priv);
3220         spin_unlock_irqrestore(&priv->lock, flags);
3221
3222         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3223                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3224                                   "disabled by HW switch\n");
3225                 return;
3226         }
3227
3228         queue_work(priv->workqueue, &priv->restart);
3229         return;
3230 }
3231
3232 void iwl4965_set_decrypted_flag(struct iwl4965_priv *priv, struct sk_buff *skb,
3233                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3234 {
3235         u16 fc =
3236             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3237
3238         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3239                 return;
3240
3241         if (!(fc & IEEE80211_FCTL_PROTECTED))
3242                 return;
3243
3244         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3245         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3246         case RX_RES_STATUS_SEC_TYPE_TKIP:
3247                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3248                     RX_RES_STATUS_BAD_ICV_MIC)
3249                         stats->flag |= RX_FLAG_MMIC_ERROR;
3250         case RX_RES_STATUS_SEC_TYPE_WEP:
3251         case RX_RES_STATUS_SEC_TYPE_CCMP:
3252                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3253                     RX_RES_STATUS_DECRYPT_OK) {
3254                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3255                         stats->flag |= RX_FLAG_DECRYPTED;
3256                 }
3257                 break;
3258
3259         default:
3260                 break;
3261         }
3262 }
3263
3264
3265 #define IWL_PACKET_RETRY_TIME HZ
3266
3267 int iwl4965_is_duplicate_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
3268 {
3269         u16 sc = le16_to_cpu(header->seq_ctrl);
3270         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3271         u16 frag = sc & IEEE80211_SCTL_FRAG;
3272         u16 *last_seq, *last_frag;
3273         unsigned long *last_time;
3274
3275         switch (priv->iw_mode) {
3276         case IEEE80211_IF_TYPE_IBSS:{
3277                 struct list_head *p;
3278                 struct iwl4965_ibss_seq *entry = NULL;
3279                 u8 *mac = header->addr2;
3280                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3281
3282                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3283                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
3284                         if (!compare_ether_addr(entry->mac, mac))
3285                                 break;
3286                 }
3287                 if (p == &priv->ibss_mac_hash[index]) {
3288                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3289                         if (!entry) {
3290                                 IWL_ERROR("Cannot malloc new mac entry\n");
3291                                 return 0;
3292                         }
3293                         memcpy(entry->mac, mac, ETH_ALEN);
3294                         entry->seq_num = seq;
3295                         entry->frag_num = frag;
3296                         entry->packet_time = jiffies;
3297                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3298                         return 0;
3299                 }
3300                 last_seq = &entry->seq_num;
3301                 last_frag = &entry->frag_num;
3302                 last_time = &entry->packet_time;
3303                 break;
3304         }
3305         case IEEE80211_IF_TYPE_STA:
3306                 last_seq = &priv->last_seq_num;
3307                 last_frag = &priv->last_frag_num;
3308                 last_time = &priv->last_packet_time;
3309                 break;
3310         default:
3311                 return 0;
3312         }
3313         if ((*last_seq == seq) &&
3314             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3315                 if (*last_frag == frag)
3316                         goto drop;
3317                 if (*last_frag + 1 != frag)
3318                         /* out-of-order fragment */
3319                         goto drop;
3320         } else
3321                 *last_seq = seq;
3322
3323         *last_frag = frag;
3324         *last_time = jiffies;
3325         return 0;
3326
3327  drop:
3328         return 1;
3329 }
3330
3331 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3332
3333 #include "iwl-spectrum.h"
3334
3335 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3336 #define BEACON_TIME_MASK_HIGH   0xFF000000
3337 #define TIME_UNIT               1024
3338
3339 /*
3340  * extended beacon time format
3341  * time in usec will be changed into a 32-bit value in 8:24 format
3342  * the high 1 byte is the beacon counts
3343  * the lower 3 bytes is the time in usec within one beacon interval
3344  */
3345
3346 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
3347 {
3348         u32 quot;
3349         u32 rem;
3350         u32 interval = beacon_interval * 1024;
3351
3352         if (!interval || !usec)
3353                 return 0;
3354
3355         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3356         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3357
3358         return (quot << 24) + rem;
3359 }
3360
3361 /* base is usually what we get from ucode with each received frame,
3362  * the same as HW timer counter counting down
3363  */
3364
3365 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3366 {
3367         u32 base_low = base & BEACON_TIME_MASK_LOW;
3368         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3369         u32 interval = beacon_interval * TIME_UNIT;
3370         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3371             (addon & BEACON_TIME_MASK_HIGH);
3372
3373         if (base_low > addon_low)
3374                 res += base_low - addon_low;
3375         else if (base_low < addon_low) {
3376                 res += interval + base_low - addon_low;
3377                 res += (1 << 24);
3378         } else
3379                 res += (1 << 24);
3380
3381         return cpu_to_le32(res);
3382 }
3383
3384 static int iwl4965_get_measurement(struct iwl4965_priv *priv,
3385                                struct ieee80211_measurement_params *params,
3386                                u8 type)
3387 {
3388         struct iwl4965_spectrum_cmd spectrum;
3389         struct iwl4965_rx_packet *res;
3390         struct iwl4965_host_cmd cmd = {
3391                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3392                 .data = (void *)&spectrum,
3393                 .meta.flags = CMD_WANT_SKB,
3394         };
3395         u32 add_time = le64_to_cpu(params->start_time);
3396         int rc;
3397         int spectrum_resp_status;
3398         int duration = le16_to_cpu(params->duration);
3399
3400         if (iwl4965_is_associated(priv))
3401                 add_time =
3402                     iwl4965_usecs_to_beacons(
3403                         le64_to_cpu(params->start_time) - priv->last_tsf,
3404                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3405
3406         memset(&spectrum, 0, sizeof(spectrum));
3407
3408         spectrum.channel_count = cpu_to_le16(1);
3409         spectrum.flags =
3410             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3411         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3412         cmd.len = sizeof(spectrum);
3413         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3414
3415         if (iwl4965_is_associated(priv))
3416                 spectrum.start_time =
3417                     iwl4965_add_beacon_time(priv->last_beacon_time,
3418                                 add_time,
3419                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3420         else
3421                 spectrum.start_time = 0;
3422
3423         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3424         spectrum.channels[0].channel = params->channel;
3425         spectrum.channels[0].type = type;
3426         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3427                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3428                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3429
3430         rc = iwl4965_send_cmd_sync(priv, &cmd);
3431         if (rc)
3432                 return rc;
3433
3434         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
3435         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3436                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3437                 rc = -EIO;
3438         }
3439
3440         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3441         switch (spectrum_resp_status) {
3442         case 0:         /* Command will be handled */
3443                 if (res->u.spectrum.id != 0xff) {
3444                         IWL_DEBUG_INFO
3445                             ("Replaced existing measurement: %d\n",
3446                              res->u.spectrum.id);
3447                         priv->measurement_status &= ~MEASUREMENT_READY;
3448                 }
3449                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3450                 rc = 0;
3451                 break;
3452
3453         case 1:         /* Command will not be handled */
3454                 rc = -EAGAIN;
3455                 break;
3456         }
3457
3458         dev_kfree_skb_any(cmd.meta.u.skb);
3459
3460         return rc;
3461 }
3462 #endif
3463
3464 static void iwl4965_txstatus_to_ieee(struct iwl4965_priv *priv,
3465                                  struct iwl4965_tx_info *tx_sta)
3466 {
3467
3468         tx_sta->status.ack_signal = 0;
3469         tx_sta->status.excessive_retries = 0;
3470         tx_sta->status.queue_length = 0;
3471         tx_sta->status.queue_number = 0;
3472
3473         if (in_interrupt())
3474                 ieee80211_tx_status_irqsafe(priv->hw,
3475                                             tx_sta->skb[0], &(tx_sta->status));
3476         else
3477                 ieee80211_tx_status(priv->hw,
3478                                     tx_sta->skb[0], &(tx_sta->status));
3479
3480         tx_sta->skb[0] = NULL;
3481 }
3482
3483 /**
3484  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3485  *
3486  * When FW advances 'R' index, all entries between old and new 'R' index
3487  * need to be reclaimed. As result, some free space forms.  If there is
3488  * enough free space (> low mark), wake the stack that feeds us.
3489  */
3490 int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index)
3491 {
3492         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3493         struct iwl4965_queue *q = &txq->q;
3494         int nfreed = 0;
3495
3496         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3497                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3498                           "is out of range [0-%d] %d %d.\n", txq_id,
3499                           index, q->n_bd, q->write_ptr, q->read_ptr);
3500                 return 0;
3501         }
3502
3503         for (index = iwl4965_queue_inc_wrap(index, q->n_bd);
3504                 q->read_ptr != index;
3505                 q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3506                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3507                         iwl4965_txstatus_to_ieee(priv,
3508                                         &(txq->txb[txq->q.read_ptr]));
3509                         iwl4965_hw_txq_free_tfd(priv, txq);
3510                 } else if (nfreed > 1) {
3511                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3512                                         q->write_ptr, q->read_ptr);
3513                         queue_work(priv->workqueue, &priv->restart);
3514                 }
3515                 nfreed++;
3516         }
3517
3518         if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3519                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3520                         priv->mac80211_registered)
3521                 ieee80211_wake_queue(priv->hw, txq_id);
3522
3523
3524         return nfreed;
3525 }
3526
3527 static int iwl4965_is_tx_success(u32 status)
3528 {
3529         status &= TX_STATUS_MSK;
3530         return (status == TX_STATUS_SUCCESS)
3531             || (status == TX_STATUS_DIRECT_DONE);
3532 }
3533
3534 /******************************************************************************
3535  *
3536  * Generic RX handler implementations
3537  *
3538  ******************************************************************************/
3539 #ifdef CONFIG_IWL4965_HT
3540 #ifdef CONFIG_IWL4965_HT_AGG
3541
3542 static inline int iwl4965_get_ra_sta_id(struct iwl4965_priv *priv,
3543                                     struct ieee80211_hdr *hdr)
3544 {
3545         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3546                 return IWL_AP_ID;
3547         else {
3548                 u8 *da = ieee80211_get_DA(hdr);
3549                 return iwl4965_hw_find_station(priv, da);
3550         }
3551 }
3552
3553 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
3554         struct iwl4965_priv *priv, int txq_id, int idx)
3555 {
3556         if (priv->txq[txq_id].txb[idx].skb[0])
3557                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3558                                 txb[idx].skb[0]->data;
3559         return NULL;
3560 }
3561
3562 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3563 {
3564         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3565                                 tx_resp->frame_count);
3566         return le32_to_cpu(*scd_ssn) & MAX_SN;
3567
3568 }
3569
3570 /**
3571  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3572  */
3573 static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
3574                                       struct iwl4965_ht_agg *agg,
3575                                       struct iwl4965_tx_resp *tx_resp,
3576                                       u16 start_idx)
3577 {
3578         u32 status;
3579         __le32 *frame_status = &tx_resp->status;
3580         struct ieee80211_tx_status *tx_status = NULL;
3581         struct ieee80211_hdr *hdr = NULL;
3582         int i, sh;
3583         int txq_id, idx;
3584         u16 seq;
3585
3586         if (agg->wait_for_ba)
3587                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3588
3589         agg->frame_count = tx_resp->frame_count;
3590         agg->start_idx = start_idx;
3591         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3592         agg->bitmap0 = agg->bitmap1 = 0;
3593
3594         /* # frames attempted by Tx command */
3595         if (agg->frame_count == 1) {
3596                 /* Only one frame was attempted; no block-ack will arrive */
3597                 struct iwl4965_tx_queue *txq ;
3598                 status = le32_to_cpu(frame_status[0]);
3599
3600                 txq_id = agg->txq_id;
3601                 txq = &priv->txq[txq_id];
3602                 /* FIXME: code repetition */
3603                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3604                                    agg->frame_count, agg->start_idx);
3605
3606                 tx_status = &(priv->txq[txq_id].txb[txq->q.read_ptr].status);
3607                 tx_status->retry_count = tx_resp->failure_frame;
3608                 tx_status->queue_number = status & 0xff;
3609                 tx_status->queue_length = tx_resp->bt_kill_count;
3610                 tx_status->queue_length |= tx_resp->failure_rts;
3611
3612                 tx_status->flags = iwl4965_is_tx_success(status)?
3613                         IEEE80211_TX_STATUS_ACK : 0;
3614                 tx_status->control.tx_rate =
3615                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3616                 /* FIXME: code repetition end */
3617
3618                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3619                                     status & 0xff, tx_resp->failure_frame);
3620                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3621                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3622
3623                 agg->wait_for_ba = 0;
3624         } else {
3625                 /* Two or more frames were attempted; expect block-ack */
3626                 u64 bitmap = 0;
3627                 int start = agg->start_idx;
3628
3629                 /* Construct bit-map of pending frames within Tx window */
3630                 for (i = 0; i < agg->frame_count; i++) {
3631                         u16 sc;
3632                         status = le32_to_cpu(frame_status[i]);
3633                         seq  = status >> 16;
3634                         idx = SEQ_TO_INDEX(seq);
3635                         txq_id = SEQ_TO_QUEUE(seq);
3636
3637                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3638                                       AGG_TX_STATE_ABORT_MSK))
3639                                 continue;
3640
3641                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3642                                            agg->frame_count, txq_id, idx);
3643
3644                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3645
3646                         sc = le16_to_cpu(hdr->seq_ctrl);
3647                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3648                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3649                                           " idx=%d, seq_idx=%d, seq=%d\n",
3650                                           idx, SEQ_TO_SN(sc),
3651                                           hdr->seq_ctrl);
3652                                 return -1;
3653                         }
3654
3655                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3656                                            i, idx, SEQ_TO_SN(sc));
3657
3658                         sh = idx - start;
3659                         if (sh > 64) {
3660                                 sh = (start - idx) + 0xff;
3661                                 bitmap = bitmap << sh;
3662                                 sh = 0;
3663                                 start = idx;
3664                         } else if (sh < -64)
3665                                 sh  = 0xff - (start - idx);
3666                         else if (sh < 0) {
3667                                 sh = start - idx;
3668                                 start = idx;
3669                                 bitmap = bitmap << sh;
3670                                 sh = 0;
3671                         }
3672                         bitmap |= (1 << sh);
3673                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3674                                            start, (u32)(bitmap & 0xFFFFFFFF));
3675                 }
3676
3677                 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3678                 agg->bitmap1 = bitmap >> 32;
3679                 agg->start_idx = start;
3680                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3681                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3682                                    agg->frame_count, agg->start_idx,
3683                                    agg->bitmap0);
3684
3685                 if (bitmap)
3686                         agg->wait_for_ba = 1;
3687         }
3688         return 0;
3689 }
3690 #endif
3691 #endif
3692
3693 /**
3694  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3695  */
3696 static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
3697                             struct iwl4965_rx_mem_buffer *rxb)
3698 {
3699         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3700         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3701         int txq_id = SEQ_TO_QUEUE(sequence);
3702         int index = SEQ_TO_INDEX(sequence);
3703         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3704         struct ieee80211_tx_status *tx_status;
3705         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3706         u32  status = le32_to_cpu(tx_resp->status);
3707 #ifdef CONFIG_IWL4965_HT
3708 #ifdef CONFIG_IWL4965_HT_AGG
3709         int tid, sta_id;
3710 #endif
3711 #endif
3712
3713         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3714                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3715                           "is out of range [0-%d] %d %d\n", txq_id,
3716                           index, txq->q.n_bd, txq->q.write_ptr,
3717                           txq->q.read_ptr);
3718                 return;
3719         }
3720
3721 #ifdef CONFIG_IWL4965_HT
3722 #ifdef CONFIG_IWL4965_HT_AGG
3723         if (txq->sched_retry) {
3724                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3725                 struct ieee80211_hdr *hdr =
3726                         iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3727                 struct iwl4965_ht_agg *agg = NULL;
3728                 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3729
3730                 if (qc == NULL) {
3731                         IWL_ERROR("BUG_ON qc is null!!!!\n");
3732                         return;
3733                 }
3734
3735                 tid = le16_to_cpu(*qc) & 0xf;
3736
3737                 sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3738                 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3739                         IWL_ERROR("Station not known for\n");
3740                         return;
3741                 }
3742
3743                 agg = &priv->stations[sta_id].tid[tid].agg;
3744
3745                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3746
3747                 if ((tx_resp->frame_count == 1) &&
3748                     !iwl4965_is_tx_success(status)) {
3749                         /* TODO: send BAR */
3750                 }
3751
3752                 if ((txq->q.read_ptr != (scd_ssn & 0xff))) {
3753                         index = iwl4965_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3754                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3755                                            "%d index %d\n", scd_ssn , index);
3756                         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3757                 }
3758         } else {
3759 #endif /* CONFIG_IWL4965_HT_AGG */
3760 #endif /* CONFIG_IWL4965_HT */
3761         tx_status = &(txq->txb[txq->q.read_ptr].status);
3762
3763         tx_status->retry_count = tx_resp->failure_frame;
3764         tx_status->queue_number = status;
3765         tx_status->queue_length = tx_resp->bt_kill_count;
3766         tx_status->queue_length |= tx_resp->failure_rts;
3767
3768         tx_status->flags =
3769             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3770
3771         tx_status->control.tx_rate =
3772                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3773
3774         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3775                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3776                      status, le32_to_cpu(tx_resp->rate_n_flags),
3777                      tx_resp->failure_frame);
3778
3779         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3780         if (index != -1)
3781                 iwl4965_tx_queue_reclaim(priv, txq_id, index);
3782 #ifdef CONFIG_IWL4965_HT
3783 #ifdef CONFIG_IWL4965_HT_AGG
3784         }
3785 #endif /* CONFIG_IWL4965_HT_AGG */
3786 #endif /* CONFIG_IWL4965_HT */
3787
3788         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3789                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3790 }
3791
3792
3793 static void iwl4965_rx_reply_alive(struct iwl4965_priv *priv,
3794                                struct iwl4965_rx_mem_buffer *rxb)
3795 {
3796         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3797         struct iwl4965_alive_resp *palive;
3798         struct delayed_work *pwork;
3799
3800         palive = &pkt->u.alive_frame;
3801
3802         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3803                        "0x%01X 0x%01X\n",
3804                        palive->is_valid, palive->ver_type,
3805                        palive->ver_subtype);
3806
3807         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3808                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3809                 memcpy(&priv->card_alive_init,
3810                        &pkt->u.alive_frame,
3811                        sizeof(struct iwl4965_init_alive_resp));
3812                 pwork = &priv->init_alive_start;
3813         } else {
3814                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3815                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3816                        sizeof(struct iwl4965_alive_resp));
3817                 pwork = &priv->alive_start;
3818         }
3819
3820         /* We delay the ALIVE response by 5ms to
3821          * give the HW RF Kill time to activate... */
3822         if (palive->is_valid == UCODE_VALID_OK)
3823                 queue_delayed_work(priv->workqueue, pwork,
3824                                    msecs_to_jiffies(5));
3825         else
3826                 IWL_WARNING("uCode did not respond OK.\n");
3827 }
3828
3829 static void iwl4965_rx_reply_add_sta(struct iwl4965_priv *priv,
3830                                  struct iwl4965_rx_mem_buffer *rxb)
3831 {
3832         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3833
3834         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3835         return;
3836 }
3837
3838 static void iwl4965_rx_reply_error(struct iwl4965_priv *priv,
3839                                struct iwl4965_rx_mem_buffer *rxb)
3840 {
3841         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3842
3843         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3844                 "seq 0x%04X ser 0x%08X\n",
3845                 le32_to_cpu(pkt->u.err_resp.error_type),
3846                 get_cmd_string(pkt->u.err_resp.cmd_id),
3847                 pkt->u.err_resp.cmd_id,
3848                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3849                 le32_to_cpu(pkt->u.err_resp.error_info));
3850 }
3851
3852 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3853
3854 static void iwl4965_rx_csa(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3855 {
3856         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3857         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3858         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3859         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3860                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3861         rxon->channel = csa->channel;
3862         priv->staging_rxon.channel = csa->channel;
3863 }
3864
3865 static void iwl4965_rx_spectrum_measure_notif(struct iwl4965_priv *priv,
3866                                           struct iwl4965_rx_mem_buffer *rxb)
3867 {
3868 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3869         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3870         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3871
3872         if (!report->state) {
3873                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3874                           "Spectrum Measure Notification: Start\n");
3875                 return;
3876         }
3877
3878         memcpy(&priv->measure_report, report, sizeof(*report));
3879         priv->measurement_status |= MEASUREMENT_READY;
3880 #endif
3881 }
3882
3883 static void iwl4965_rx_pm_sleep_notif(struct iwl4965_priv *priv,
3884                                   struct iwl4965_rx_mem_buffer *rxb)
3885 {
3886 #ifdef CONFIG_IWL4965_DEBUG
3887         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3888         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3889         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3890                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3891 #endif
3892 }
3893
3894 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl4965_priv *priv,
3895                                              struct iwl4965_rx_mem_buffer *rxb)
3896 {
3897         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3898         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3899                         "notification for %s:\n",
3900                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3901         iwl4965_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3902 }
3903
3904 static void iwl4965_bg_beacon_update(struct work_struct *work)
3905 {
3906         struct iwl4965_priv *priv =
3907                 container_of(work, struct iwl4965_priv, beacon_update);
3908         struct sk_buff *beacon;
3909
3910         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3911         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3912
3913         if (!beacon) {
3914                 IWL_ERROR("update beacon failed\n");
3915                 return;
3916         }
3917
3918         mutex_lock(&priv->mutex);
3919         /* new beacon skb is allocated every time; dispose previous.*/
3920         if (priv->ibss_beacon)
3921                 dev_kfree_skb(priv->ibss_beacon);
3922
3923         priv->ibss_beacon = beacon;
3924         mutex_unlock(&priv->mutex);
3925
3926         iwl4965_send_beacon_cmd(priv);
3927 }
3928
3929 static void iwl4965_rx_beacon_notif(struct iwl4965_priv *priv,
3930                                 struct iwl4965_rx_mem_buffer *rxb)
3931 {
3932 #ifdef CONFIG_IWL4965_DEBUG
3933         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3934         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3935         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3936
3937         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3938                 "tsf %d %d rate %d\n",
3939                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3940                 beacon->beacon_notify_hdr.failure_frame,
3941                 le32_to_cpu(beacon->ibss_mgr_status),
3942                 le32_to_cpu(beacon->high_tsf),
3943                 le32_to_cpu(beacon->low_tsf), rate);
3944 #endif
3945
3946         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3947             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3948                 queue_work(priv->workqueue, &priv->beacon_update);
3949 }
3950
3951 /* Service response to REPLY_SCAN_CMD (0x80) */
3952 static void iwl4965_rx_reply_scan(struct iwl4965_priv *priv,
3953                               struct iwl4965_rx_mem_buffer *rxb)
3954 {
3955 #ifdef CONFIG_IWL4965_DEBUG
3956         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3957         struct iwl4965_scanreq_notification *notif =
3958             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3959
3960         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3961 #endif
3962 }
3963
3964 /* Service SCAN_START_NOTIFICATION (0x82) */
3965 static void iwl4965_rx_scan_start_notif(struct iwl4965_priv *priv,
3966                                     struct iwl4965_rx_mem_buffer *rxb)
3967 {
3968         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3969         struct iwl4965_scanstart_notification *notif =
3970             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3971         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3972         IWL_DEBUG_SCAN("Scan start: "
3973                        "%d [802.11%s] "
3974                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3975                        notif->channel,
3976                        notif->band ? "bg" : "a",
3977                        notif->tsf_high,
3978                        notif->tsf_low, notif->status, notif->beacon_timer);
3979 }
3980
3981 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3982 static void iwl4965_rx_scan_results_notif(struct iwl4965_priv *priv,
3983                                       struct iwl4965_rx_mem_buffer *rxb)
3984 {
3985         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3986         struct iwl4965_scanresults_notification *notif =
3987             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3988
3989         IWL_DEBUG_SCAN("Scan ch.res: "
3990                        "%d [802.11%s] "
3991                        "(TSF: 0x%08X:%08X) - %d "
3992                        "elapsed=%lu usec (%dms since last)\n",
3993                        notif->channel,
3994                        notif->band ? "bg" : "a",
3995                        le32_to_cpu(notif->tsf_high),
3996                        le32_to_cpu(notif->tsf_low),
3997                        le32_to_cpu(notif->statistics[0]),
3998                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3999                        jiffies_to_msecs(elapsed_jiffies
4000                                         (priv->last_scan_jiffies, jiffies)));
4001
4002         priv->last_scan_jiffies = jiffies;
4003         priv->next_scan_jiffies = 0;
4004 }
4005
4006 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
4007 static void iwl4965_rx_scan_complete_notif(struct iwl4965_priv *priv,
4008                                        struct iwl4965_rx_mem_buffer *rxb)
4009 {
4010         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4011         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
4012
4013         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
4014                        scan_notif->scanned_channels,
4015                        scan_notif->tsf_low,
4016                        scan_notif->tsf_high, scan_notif->status);
4017
4018         /* The HW is no longer scanning */
4019         clear_bit(STATUS_SCAN_HW, &priv->status);
4020
4021         /* The scan completion notification came in, so kill that timer... */
4022         cancel_delayed_work(&priv->scan_check);
4023
4024         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
4025                        (priv->scan_bands == 2) ? "2.4" : "5.2",
4026                        jiffies_to_msecs(elapsed_jiffies
4027                                         (priv->scan_pass_start, jiffies)));
4028
4029         /* Remove this scanned band from the list
4030          * of pending bands to scan */
4031         priv->scan_bands--;
4032
4033         /* If a request to abort was given, or the scan did not succeed
4034          * then we reset the scan state machine and terminate,
4035          * re-queuing another scan if one has been requested */
4036         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4037                 IWL_DEBUG_INFO("Aborted scan completed.\n");
4038                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
4039         } else {
4040                 /* If there are more bands on this scan pass reschedule */
4041                 if (priv->scan_bands > 0)
4042                         goto reschedule;
4043         }
4044
4045         priv->last_scan_jiffies = jiffies;
4046         priv->next_scan_jiffies = 0;
4047         IWL_DEBUG_INFO("Setting scan to off\n");
4048
4049         clear_bit(STATUS_SCANNING, &priv->status);
4050
4051         IWL_DEBUG_INFO("Scan took %dms\n",
4052                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4053
4054         queue_work(priv->workqueue, &priv->scan_completed);
4055
4056         return;
4057
4058 reschedule:
4059         priv->scan_pass_start = jiffies;
4060         queue_work(priv->workqueue, &priv->request_scan);
4061 }
4062
4063 /* Handle notification from uCode that card's power state is changing
4064  * due to software, hardware, or critical temperature RFKILL */
4065 static void iwl4965_rx_card_state_notif(struct iwl4965_priv *priv,
4066                                     struct iwl4965_rx_mem_buffer *rxb)
4067 {
4068         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4069         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4070         unsigned long status = priv->status;
4071
4072         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4073                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4074                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4075
4076         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4077                      RF_CARD_DISABLED)) {
4078
4079                 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4080                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4081
4082                 if (!iwl4965_grab_nic_access(priv)) {
4083                         iwl4965_write_direct32(
4084                                 priv, HBUS_TARG_MBX_C,
4085                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4086
4087                         iwl4965_release_nic_access(priv);
4088                 }
4089
4090                 if (!(flags & RXON_CARD_DISABLED)) {
4091                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4092                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4093                         if (!iwl4965_grab_nic_access(priv)) {
4094                                 iwl4965_write_direct32(
4095                                         priv, HBUS_TARG_MBX_C,
4096                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4097
4098                                 iwl4965_release_nic_access(priv);
4099                         }
4100                 }
4101
4102                 if (flags & RF_CARD_DISABLED) {
4103                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4104                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4105                         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4106                         if (!iwl4965_grab_nic_access(priv))
4107                                 iwl4965_release_nic_access(priv);
4108                 }
4109         }
4110
4111         if (flags & HW_CARD_DISABLED)
4112                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4113         else
4114                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4115
4116
4117         if (flags & SW_CARD_DISABLED)
4118                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4119         else
4120                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4121
4122         if (!(flags & RXON_CARD_DISABLED))
4123                 iwl4965_scan_cancel(priv);
4124
4125         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4126              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4127             (test_bit(STATUS_RF_KILL_SW, &status) !=
4128              test_bit(STATUS_RF_KILL_SW, &priv->status)))
4129                 queue_work(priv->workqueue, &priv->rf_kill);
4130         else
4131                 wake_up_interruptible(&priv->wait_command_queue);
4132 }
4133
4134 /**
4135  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
4136  *
4137  * Setup the RX handlers for each of the reply types sent from the uCode
4138  * to the host.
4139  *
4140  * This function chains into the hardware specific files for them to setup
4141  * any hardware specific handlers as well.
4142  */
4143 static void iwl4965_setup_rx_handlers(struct iwl4965_priv *priv)
4144 {
4145         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
4146         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
4147         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
4148         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
4149         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4150             iwl4965_rx_spectrum_measure_notif;
4151         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
4152         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4153             iwl4965_rx_pm_debug_statistics_notif;
4154         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
4155
4156         /*
4157          * The same handler is used for both the REPLY to a discrete
4158          * statistics request from the host as well as for the periodic
4159          * statistics notifications (after received beacons) from the uCode.
4160          */
4161         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
4162         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
4163
4164         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
4165         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
4166         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4167             iwl4965_rx_scan_results_notif;
4168         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4169             iwl4965_rx_scan_complete_notif;
4170         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
4171         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
4172
4173         /* Set up hardware specific Rx handlers */
4174         iwl4965_hw_rx_handler_setup(priv);
4175 }
4176
4177 /**
4178  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4179  * @rxb: Rx buffer to reclaim
4180  *
4181  * If an Rx buffer has an async callback associated with it the callback
4182  * will be executed.  The attached skb (if present) will only be freed
4183  * if the callback returns 1
4184  */
4185 static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
4186                                 struct iwl4965_rx_mem_buffer *rxb)
4187 {
4188         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4189         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4190         int txq_id = SEQ_TO_QUEUE(sequence);
4191         int index = SEQ_TO_INDEX(sequence);
4192         int huge = sequence & SEQ_HUGE_FRAME;
4193         int cmd_index;
4194         struct iwl4965_cmd *cmd;
4195
4196         /* If a Tx command is being handled and it isn't in the actual
4197          * command queue then there a command routing bug has been introduced
4198          * in the queue management code. */
4199         if (txq_id != IWL_CMD_QUEUE_NUM)
4200                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4201                           txq_id, pkt->hdr.cmd);
4202         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4203
4204         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4205         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4206
4207         /* Input error checking is done when commands are added to queue. */
4208         if (cmd->meta.flags & CMD_WANT_SKB) {
4209                 cmd->meta.source->u.skb = rxb->skb;
4210                 rxb->skb = NULL;
4211         } else if (cmd->meta.u.callback &&
4212                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
4213                 rxb->skb = NULL;
4214
4215         iwl4965_tx_queue_reclaim(priv, txq_id, index);
4216
4217         if (!(cmd->meta.flags & CMD_ASYNC)) {
4218                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4219                 wake_up_interruptible(&priv->wait_command_queue);
4220         }
4221 }
4222
4223 /************************** RX-FUNCTIONS ****************************/
4224 /*
4225  * Rx theory of operation
4226  *
4227  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
4228  * each of which point to Receive Buffers to be filled by 4965.  These get
4229  * used not only for Rx frames, but for any command response or notification
4230  * from the 4965.  The driver and 4965 manage the Rx buffers by means
4231  * of indexes into the circular buffer.
4232  *
4233  * Rx Queue Indexes
4234  * The host/firmware share two index registers for managing the Rx buffers.
4235  *
4236  * The READ index maps to the first position that the firmware may be writing
4237  * to -- the driver can read up to (but not including) this position and get
4238  * good data.
4239  * The READ index is managed by the firmware once the card is enabled.
4240  *
4241  * The WRITE index maps to the last position the driver has read from -- the
4242  * position preceding WRITE is the last slot the firmware can place a packet.
4243  *
4244  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4245  * WRITE = READ.
4246  *
4247  * During initialization, the host sets up the READ queue position to the first
4248  * INDEX position, and WRITE to the last (READ - 1 wrapped)
4249  *
4250  * When the firmware places a packet in a buffer, it will advance the READ index
4251  * and fire the RX interrupt.  The driver can then query the READ index and
4252  * process as many packets as possible, moving the WRITE index forward as it
4253  * resets the Rx queue buffers with new memory.
4254  *
4255  * The management in the driver is as follows:
4256  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
4257  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4258  *   to replenish the iwl->rxq->rx_free.
4259  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
4260  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
4261  *   'processed' and 'read' driver indexes as well)
4262  * + A received packet is processed and handed to the kernel network stack,
4263  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
4264  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4265  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4266  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
4267  *   were enough free buffers and RX_STALLED is set it is cleared.
4268  *
4269  *
4270  * Driver sequence:
4271  *
4272  * iwl4965_rx_queue_alloc()   Allocates rx_free
4273  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
4274  *                            iwl4965_rx_queue_restock
4275  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
4276  *                            queue, updates firmware pointers, and updates
4277  *                            the WRITE index.  If insufficient rx_free buffers
4278  *                            are available, schedules iwl4965_rx_replenish
4279  *
4280  * -- enable interrupts --
4281  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
4282  *                            READ INDEX, detaching the SKB from the pool.
4283  *                            Moves the packet buffer from queue to rx_used.
4284  *                            Calls iwl4965_rx_queue_restock to refill any empty
4285  *                            slots.
4286  * ...
4287  *
4288  */
4289
4290 /**
4291  * iwl4965_rx_queue_space - Return number of free slots available in queue.
4292  */
4293 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
4294 {
4295         int s = q->read - q->write;
4296         if (s <= 0)
4297                 s += RX_QUEUE_SIZE;
4298         /* keep some buffer to not confuse full and empty queue */
4299         s -= 2;
4300         if (s < 0)
4301                 s = 0;
4302         return s;
4303 }
4304
4305 /**
4306  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4307  */
4308 int iwl4965_rx_queue_update_write_ptr(struct iwl4965_priv *priv, struct iwl4965_rx_queue *q)
4309 {
4310         u32 reg = 0;
4311         int rc = 0;
4312         unsigned long flags;
4313
4314         spin_lock_irqsave(&q->lock, flags);
4315
4316         if (q->need_update == 0)
4317                 goto exit_unlock;
4318
4319         /* If power-saving is in use, make sure device is awake */
4320         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4321                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4322
4323                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4324                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4325                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4326                         goto exit_unlock;
4327                 }
4328
4329                 rc = iwl4965_grab_nic_access(priv);
4330                 if (rc)
4331                         goto exit_unlock;
4332
4333                 /* Device expects a multiple of 8 */
4334                 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4335                                      q->write & ~0x7);
4336                 iwl4965_release_nic_access(priv);
4337
4338         /* Else device is assumed to be awake */
4339         } else
4340                 /* Device expects a multiple of 8 */
4341                 iwl4965_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4342
4343
4344         q->need_update = 0;
4345
4346  exit_unlock:
4347         spin_unlock_irqrestore(&q->lock, flags);
4348         return rc;
4349 }
4350
4351 /**
4352  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
4353  */
4354 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl4965_priv *priv,
4355                                           dma_addr_t dma_addr)
4356 {
4357         return cpu_to_le32((u32)(dma_addr >> 8));
4358 }
4359
4360
4361 /**
4362  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
4363  *
4364  * If there are slots in the RX queue that need to be restocked,
4365  * and we have free pre-allocated buffers, fill the ranks as much
4366  * as we can, pulling from rx_free.
4367  *
4368  * This moves the 'write' index forward to catch up with 'processed', and
4369  * also updates the memory address in the firmware to reference the new
4370  * target buffer.
4371  */
4372 static int iwl4965_rx_queue_restock(struct iwl4965_priv *priv)
4373 {
4374         struct iwl4965_rx_queue *rxq = &priv->rxq;
4375         struct list_head *element;
4376         struct iwl4965_rx_mem_buffer *rxb;
4377         unsigned long flags;
4378         int write, rc;
4379
4380         spin_lock_irqsave(&rxq->lock, flags);
4381         write = rxq->write & ~0x7;
4382         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4383                 /* Get next free Rx buffer, remove from free list */
4384                 element = rxq->rx_free.next;
4385                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4386                 list_del(element);
4387
4388                 /* Point to Rx buffer via next RBD in circular buffer */
4389                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4390                 rxq->queue[rxq->write] = rxb;
4391                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4392                 rxq->free_count--;
4393         }
4394         spin_unlock_irqrestore(&rxq->lock, flags);
4395         /* If the pre-allocated buffer pool is dropping low, schedule to
4396          * refill it */
4397         if (rxq->free_count <= RX_LOW_WATERMARK)
4398                 queue_work(priv->workqueue, &priv->rx_replenish);
4399
4400
4401         /* If we've added more space for the firmware to place data, tell it.
4402          * Increment device's write pointer in multiples of 8. */
4403         if ((write != (rxq->write & ~0x7))
4404             || (abs(rxq->write - rxq->read) > 7)) {
4405                 spin_lock_irqsave(&rxq->lock, flags);
4406                 rxq->need_update = 1;
4407                 spin_unlock_irqrestore(&rxq->lock, flags);
4408                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
4409                 if (rc)
4410                         return rc;
4411         }
4412
4413         return 0;
4414 }
4415
4416 /**
4417  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
4418  *
4419  * When moving to rx_free an SKB is allocated for the slot.
4420  *
4421  * Also restock the Rx queue via iwl4965_rx_queue_restock.
4422  * This is called as a scheduled work item (except for during initialization)
4423  */
4424 static void iwl4965_rx_allocate(struct iwl4965_priv *priv)
4425 {
4426         struct iwl4965_rx_queue *rxq = &priv->rxq;
4427         struct list_head *element;
4428         struct iwl4965_rx_mem_buffer *rxb;
4429         unsigned long flags;
4430         spin_lock_irqsave(&rxq->lock, flags);
4431         while (!list_empty(&rxq->rx_used)) {
4432                 element = rxq->rx_used.next;
4433                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4434
4435                 /* Alloc a new receive buffer */
4436                 rxb->skb =
4437                     alloc_skb(priv->hw_setting.rx_buf_size,
4438                                 __GFP_NOWARN | GFP_ATOMIC);
4439                 if (!rxb->skb) {
4440                         if (net_ratelimit())
4441                                 printk(KERN_CRIT DRV_NAME
4442                                        ": Can not allocate SKB buffers\n");
4443                         /* We don't reschedule replenish work here -- we will
4444                          * call the restock method and if it still needs
4445                          * more buffers it will schedule replenish */
4446                         break;
4447                 }
4448                 priv->alloc_rxb_skb++;
4449                 list_del(element);
4450
4451                 /* Get physical address of RB/SKB */
4452                 rxb->dma_addr =
4453                     pci_map_single(priv->pci_dev, rxb->skb->data,
4454                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
4455                 list_add_tail(&rxb->list, &rxq->rx_free);
4456                 rxq->free_count++;
4457         }
4458         spin_unlock_irqrestore(&rxq->lock, flags);
4459 }
4460
4461 /*
4462  * this should be called while priv->lock is locked
4463 */
4464 static void __iwl4965_rx_replenish(void *data)
4465 {
4466         struct iwl4965_priv *priv = data;
4467
4468         iwl4965_rx_allocate(priv);
4469         iwl4965_rx_queue_restock(priv);
4470 }
4471
4472
4473 void iwl4965_rx_replenish(void *data)
4474 {
4475         struct iwl4965_priv *priv = data;
4476         unsigned long flags;
4477
4478         iwl4965_rx_allocate(priv);
4479
4480         spin_lock_irqsave(&priv->lock, flags);
4481         iwl4965_rx_queue_restock(priv);
4482         spin_unlock_irqrestore(&priv->lock, flags);
4483 }
4484
4485 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4486  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4487  * This free routine walks the list of POOL entries and if SKB is set to
4488  * non NULL it is unmapped and freed
4489  */
4490 static void iwl4965_rx_queue_free(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4491 {
4492         int i;
4493         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4494                 if (rxq->pool[i].skb != NULL) {
4495                         pci_unmap_single(priv->pci_dev,
4496                                          rxq->pool[i].dma_addr,
4497                                          priv->hw_setting.rx_buf_size,
4498                                          PCI_DMA_FROMDEVICE);
4499                         dev_kfree_skb(rxq->pool[i].skb);
4500                 }
4501         }
4502
4503         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4504                             rxq->dma_addr);
4505         rxq->bd = NULL;
4506 }
4507
4508 int iwl4965_rx_queue_alloc(struct iwl4965_priv *priv)
4509 {
4510         struct iwl4965_rx_queue *rxq = &priv->rxq;
4511         struct pci_dev *dev = priv->pci_dev;
4512         int i;
4513
4514         spin_lock_init(&rxq->lock);
4515         INIT_LIST_HEAD(&rxq->rx_free);
4516         INIT_LIST_HEAD(&rxq->rx_used);
4517
4518         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4519         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4520         if (!rxq->bd)
4521                 return -ENOMEM;
4522
4523         /* Fill the rx_used queue with _all_ of the Rx buffers */
4524         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4525                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4526
4527         /* Set us so that we have processed and used all buffers, but have
4528          * not restocked the Rx queue with fresh buffers */
4529         rxq->read = rxq->write = 0;
4530         rxq->free_count = 0;
4531         rxq->need_update = 0;
4532         return 0;
4533 }
4534
4535 void iwl4965_rx_queue_reset(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4536 {
4537         unsigned long flags;
4538         int i;
4539         spin_lock_irqsave(&rxq->lock, flags);
4540         INIT_LIST_HEAD(&rxq->rx_free);
4541         INIT_LIST_HEAD(&rxq->rx_used);
4542         /* Fill the rx_used queue with _all_ of the Rx buffers */
4543         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4544                 /* In the reset function, these buffers may have been allocated
4545                  * to an SKB, so we need to unmap and free potential storage */
4546                 if (rxq->pool[i].skb != NULL) {
4547                         pci_unmap_single(priv->pci_dev,
4548                                          rxq->pool[i].dma_addr,
4549                                          priv->hw_setting.rx_buf_size,
4550                                          PCI_DMA_FROMDEVICE);
4551                         priv->alloc_rxb_skb--;
4552                         dev_kfree_skb(rxq->pool[i].skb);
4553                         rxq->pool[i].skb = NULL;
4554                 }
4555                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4556         }
4557
4558         /* Set us so that we have processed and used all buffers, but have
4559          * not restocked the Rx queue with fresh buffers */
4560         rxq->read = rxq->write = 0;
4561         rxq->free_count = 0;
4562         spin_unlock_irqrestore(&rxq->lock, flags);
4563 }
4564
4565 /* Convert linear signal-to-noise ratio into dB */
4566 static u8 ratio2dB[100] = {
4567 /*       0   1   2   3   4   5   6   7   8   9 */
4568          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4569         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4570         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4571         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4572         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4573         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4574         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4575         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4576         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4577         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4578 };
4579
4580 /* Calculates a relative dB value from a ratio of linear
4581  *   (i.e. not dB) signal levels.
4582  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4583 int iwl4965_calc_db_from_ratio(int sig_ratio)
4584 {
4585         /* 1000:1 or higher just report as 60 dB */
4586         if (sig_ratio >= 1000)
4587                 return 60;
4588
4589         /* 100:1 or higher, divide by 10 and use table,
4590          *   add 20 dB to make up for divide by 10 */
4591         if (sig_ratio >= 100)
4592                 return (20 + (int)ratio2dB[sig_ratio/10]);
4593
4594         /* We shouldn't see this */
4595         if (sig_ratio < 1)
4596                 return 0;
4597
4598         /* Use table for ratios 1:1 - 99:1 */
4599         return (int)ratio2dB[sig_ratio];
4600 }
4601
4602 #define PERFECT_RSSI (-20) /* dBm */
4603 #define WORST_RSSI (-95)   /* dBm */
4604 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4605
4606 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4607  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4608  *   about formulas used below. */
4609 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4610 {
4611         int sig_qual;
4612         int degradation = PERFECT_RSSI - rssi_dbm;
4613
4614         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4615          * as indicator; formula is (signal dbm - noise dbm).
4616          * SNR at or above 40 is a great signal (100%).
4617          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4618          * Weakest usable signal is usually 10 - 15 dB SNR. */
4619         if (noise_dbm) {
4620                 if (rssi_dbm - noise_dbm >= 40)
4621                         return 100;
4622                 else if (rssi_dbm < noise_dbm)
4623                         return 0;
4624                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4625
4626         /* Else use just the signal level.
4627          * This formula is a least squares fit of data points collected and
4628          *   compared with a reference system that had a percentage (%) display
4629          *   for signal quality. */
4630         } else
4631                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4632                             (15 * RSSI_RANGE + 62 * degradation)) /
4633                            (RSSI_RANGE * RSSI_RANGE);
4634
4635         if (sig_qual > 100)
4636                 sig_qual = 100;
4637         else if (sig_qual < 1)
4638                 sig_qual = 0;
4639
4640         return sig_qual;
4641 }
4642
4643 /**
4644  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4645  *
4646  * Uses the priv->rx_handlers callback function array to invoke
4647  * the appropriate handlers, including command responses,
4648  * frame-received notifications, and other notifications.
4649  */
4650 static void iwl4965_rx_handle(struct iwl4965_priv *priv)
4651 {
4652         struct iwl4965_rx_mem_buffer *rxb;
4653         struct iwl4965_rx_packet *pkt;
4654         struct iwl4965_rx_queue *rxq = &priv->rxq;
4655         u32 r, i;
4656         int reclaim;
4657         unsigned long flags;
4658         u8 fill_rx = 0;
4659         u32 count = 0;
4660
4661         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4662          * buffer that the driver may process (last buffer filled by ucode). */
4663         r = iwl4965_hw_get_rx_read(priv);
4664         i = rxq->read;
4665
4666         /* Rx interrupt, but nothing sent from uCode */
4667         if (i == r)
4668                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4669
4670         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4671                 fill_rx = 1;
4672
4673         while (i != r) {
4674                 rxb = rxq->queue[i];
4675
4676                 /* If an RXB doesn't have a Rx queue slot associated with it,
4677                  * then a bug has been introduced in the queue refilling
4678                  * routines -- catch it here */
4679                 BUG_ON(rxb == NULL);
4680
4681                 rxq->queue[i] = NULL;
4682
4683                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4684                                             priv->hw_setting.rx_buf_size,
4685                                             PCI_DMA_FROMDEVICE);
4686                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4687
4688                 /* Reclaim a command buffer only if this packet is a response
4689                  *   to a (driver-originated) command.
4690                  * If the packet (e.g. Rx frame) originated from uCode,
4691                  *   there is no command buffer to reclaim.
4692                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4693                  *   but apparently a few don't get set; catch them here. */
4694                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4695                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4696                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4697                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4698                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4699                         (pkt->hdr.cmd != REPLY_TX);
4700
4701                 /* Based on type of command response or notification,
4702                  *   handle those that need handling via function in
4703                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4704                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4705                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4706                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4707                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4708                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4709                 } else {
4710                         /* No handling needed */
4711                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4712                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4713                                 r, i, get_cmd_string(pkt->hdr.cmd),
4714                                 pkt->hdr.cmd);
4715                 }
4716
4717                 if (reclaim) {
4718                         /* Invoke any callbacks, transfer the skb to caller, and
4719                          * fire off the (possibly) blocking iwl4965_send_cmd()
4720                          * as we reclaim the driver command queue */
4721                         if (rxb && rxb->skb)
4722                                 iwl4965_tx_cmd_complete(priv, rxb);
4723                         else
4724                                 IWL_WARNING("Claim null rxb?\n");
4725                 }
4726
4727                 /* For now we just don't re-use anything.  We can tweak this
4728                  * later to try and re-use notification packets and SKBs that
4729                  * fail to Rx correctly */
4730                 if (rxb->skb != NULL) {
4731                         priv->alloc_rxb_skb--;
4732                         dev_kfree_skb_any(rxb->skb);
4733                         rxb->skb = NULL;
4734                 }
4735
4736                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4737                                  priv->hw_setting.rx_buf_size,
4738                                  PCI_DMA_FROMDEVICE);
4739                 spin_lock_irqsave(&rxq->lock, flags);
4740                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4741                 spin_unlock_irqrestore(&rxq->lock, flags);
4742                 i = (i + 1) & RX_QUEUE_MASK;
4743                 /* If there are a lot of unused frames,
4744                  * restock the Rx queue so ucode wont assert. */
4745                 if (fill_rx) {
4746                         count++;
4747                         if (count >= 8) {
4748                                 priv->rxq.read = i;
4749                                 __iwl4965_rx_replenish(priv);
4750                                 count = 0;
4751                         }
4752                 }
4753         }
4754
4755         /* Backtrack one entry */
4756         priv->rxq.read = i;
4757         iwl4965_rx_queue_restock(priv);
4758 }
4759
4760 /**
4761  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4762  */
4763 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
4764                                   struct iwl4965_tx_queue *txq)
4765 {
4766         u32 reg = 0;
4767         int rc = 0;
4768         int txq_id = txq->q.id;
4769
4770         if (txq->need_update == 0)
4771                 return rc;
4772
4773         /* if we're trying to save power */
4774         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4775                 /* wake up nic if it's powered down ...
4776                  * uCode will wake up, and interrupt us again, so next
4777                  * time we'll skip this part. */
4778                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4779
4780                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4781                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4782                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4783                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4784                         return rc;
4785                 }
4786
4787                 /* restore this queue's parameters in nic hardware. */
4788                 rc = iwl4965_grab_nic_access(priv);
4789                 if (rc)
4790                         return rc;
4791                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
4792                                      txq->q.write_ptr | (txq_id << 8));
4793                 iwl4965_release_nic_access(priv);
4794
4795         /* else not in power-save mode, uCode will never sleep when we're
4796          * trying to tx (during RFKILL, we're not trying to tx). */
4797         } else
4798                 iwl4965_write32(priv, HBUS_TARG_WRPTR,
4799                             txq->q.write_ptr | (txq_id << 8));
4800
4801         txq->need_update = 0;
4802
4803         return rc;
4804 }
4805
4806 #ifdef CONFIG_IWL4965_DEBUG
4807 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4808 {
4809         DECLARE_MAC_BUF(mac);
4810
4811         IWL_DEBUG_RADIO("RX CONFIG:\n");
4812         iwl4965_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4813         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4814         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4815         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4816                         le32_to_cpu(rxon->filter_flags));
4817         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4818         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4819                         rxon->ofdm_basic_rates);
4820         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4821         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4822                         print_mac(mac, rxon->node_addr));
4823         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4824                         print_mac(mac, rxon->bssid_addr));
4825         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4826 }
4827 #endif
4828
4829 static void iwl4965_enable_interrupts(struct iwl4965_priv *priv)
4830 {
4831         IWL_DEBUG_ISR("Enabling interrupts\n");
4832         set_bit(STATUS_INT_ENABLED, &priv->status);
4833         iwl4965_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4834 }
4835
4836 static inline void iwl4965_disable_interrupts(struct iwl4965_priv *priv)
4837 {
4838         clear_bit(STATUS_INT_ENABLED, &priv->status);
4839
4840         /* disable interrupts from uCode/NIC to host */
4841         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4842
4843         /* acknowledge/clear/reset any interrupts still pending
4844          * from uCode or flow handler (Rx/Tx DMA) */
4845         iwl4965_write32(priv, CSR_INT, 0xffffffff);
4846         iwl4965_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4847         IWL_DEBUG_ISR("Disabled interrupts\n");
4848 }
4849
4850 static const char *desc_lookup(int i)
4851 {
4852         switch (i) {
4853         case 1:
4854                 return "FAIL";
4855         case 2:
4856                 return "BAD_PARAM";
4857         case 3:
4858                 return "BAD_CHECKSUM";
4859         case 4:
4860                 return "NMI_INTERRUPT";
4861         case 5:
4862                 return "SYSASSERT";
4863         case 6:
4864                 return "FATAL_ERROR";
4865         }
4866
4867         return "UNKNOWN";
4868 }
4869
4870 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4871 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4872
4873 static void iwl4965_dump_nic_error_log(struct iwl4965_priv *priv)
4874 {
4875         u32 data2, line;
4876         u32 desc, time, count, base, data1;
4877         u32 blink1, blink2, ilink1, ilink2;
4878         int rc;
4879
4880         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4881
4882         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4883                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4884                 return;
4885         }
4886
4887         rc = iwl4965_grab_nic_access(priv);
4888         if (rc) {
4889                 IWL_WARNING("Can not read from adapter at this time.\n");
4890                 return;
4891         }
4892
4893         count = iwl4965_read_targ_mem(priv, base);
4894
4895         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4896                 IWL_ERROR("Start IWL Error Log Dump:\n");
4897                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4898                           priv->status, priv->config, count);
4899         }
4900
4901         desc = iwl4965_read_targ_mem(priv, base + 1 * sizeof(u32));
4902         blink1 = iwl4965_read_targ_mem(priv, base + 3 * sizeof(u32));
4903         blink2 = iwl4965_read_targ_mem(priv, base + 4 * sizeof(u32));
4904         ilink1 = iwl4965_read_targ_mem(priv, base + 5 * sizeof(u32));
4905         ilink2 = iwl4965_read_targ_mem(priv, base + 6 * sizeof(u32));
4906         data1 = iwl4965_read_targ_mem(priv, base + 7 * sizeof(u32));
4907         data2 = iwl4965_read_targ_mem(priv, base + 8 * sizeof(u32));
4908         line = iwl4965_read_targ_mem(priv, base + 9 * sizeof(u32));
4909         time = iwl4965_read_targ_mem(priv, base + 11 * sizeof(u32));
4910
4911         IWL_ERROR("Desc               Time       "
4912                   "data1      data2      line\n");
4913         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4914                   desc_lookup(desc), desc, time, data1, data2, line);
4915         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4916         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4917                   ilink1, ilink2);
4918
4919         iwl4965_release_nic_access(priv);
4920 }
4921
4922 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4923
4924 /**
4925  * iwl4965_print_event_log - Dump error event log to syslog
4926  *
4927  * NOTE: Must be called with iwl4965_grab_nic_access() already obtained!
4928  */
4929 static void iwl4965_print_event_log(struct iwl4965_priv *priv, u32 start_idx,
4930                                 u32 num_events, u32 mode)
4931 {
4932         u32 i;
4933         u32 base;       /* SRAM byte address of event log header */
4934         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4935         u32 ptr;        /* SRAM byte address of log data */
4936         u32 ev, time, data; /* event log data */
4937
4938         if (num_events == 0)
4939                 return;
4940
4941         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4942
4943         if (mode == 0)
4944                 event_size = 2 * sizeof(u32);
4945         else
4946                 event_size = 3 * sizeof(u32);
4947
4948         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4949
4950         /* "time" is actually "data" for mode 0 (no timestamp).
4951          * place event id # at far right for easier visual parsing. */
4952         for (i = 0; i < num_events; i++) {
4953                 ev = iwl4965_read_targ_mem(priv, ptr);
4954                 ptr += sizeof(u32);
4955                 time = iwl4965_read_targ_mem(priv, ptr);
4956                 ptr += sizeof(u32);
4957                 if (mode == 0)
4958                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4959                 else {
4960                         data = iwl4965_read_targ_mem(priv, ptr);
4961                         ptr += sizeof(u32);
4962                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4963                 }
4964         }
4965 }
4966
4967 static void iwl4965_dump_nic_event_log(struct iwl4965_priv *priv)
4968 {
4969         int rc;
4970         u32 base;       /* SRAM byte address of event log header */
4971         u32 capacity;   /* event log capacity in # entries */
4972         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4973         u32 num_wraps;  /* # times uCode wrapped to top of log */
4974         u32 next_entry; /* index of next entry to be written by uCode */
4975         u32 size;       /* # entries that we'll print */
4976
4977         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4978         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4979                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4980                 return;
4981         }
4982
4983         rc = iwl4965_grab_nic_access(priv);
4984         if (rc) {
4985                 IWL_WARNING("Can not read from adapter at this time.\n");
4986                 return;
4987         }
4988
4989         /* event log header */
4990         capacity = iwl4965_read_targ_mem(priv, base);
4991         mode = iwl4965_read_targ_mem(priv, base + (1 * sizeof(u32)));
4992         num_wraps = iwl4965_read_targ_mem(priv, base + (2 * sizeof(u32)));
4993         next_entry = iwl4965_read_targ_mem(priv, base + (3 * sizeof(u32)));
4994
4995         size = num_wraps ? capacity : next_entry;
4996
4997         /* bail out if nothing in log */
4998         if (size == 0) {
4999                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
5000                 iwl4965_release_nic_access(priv);
5001                 return;
5002         }
5003
5004         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
5005                   size, num_wraps);
5006
5007         /* if uCode has wrapped back to top of log, start at the oldest entry,
5008          * i.e the next one that uCode would fill. */
5009         if (num_wraps)
5010                 iwl4965_print_event_log(priv, next_entry,
5011                                     capacity - next_entry, mode);
5012
5013         /* (then/else) start at top of log */
5014         iwl4965_print_event_log(priv, 0, next_entry, mode);
5015
5016         iwl4965_release_nic_access(priv);
5017 }
5018
5019 /**
5020  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
5021  */
5022 static void iwl4965_irq_handle_error(struct iwl4965_priv *priv)
5023 {
5024         /* Set the FW error flag -- cleared on iwl4965_down */
5025         set_bit(STATUS_FW_ERROR, &priv->status);
5026
5027         /* Cancel currently queued command. */
5028         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
5029
5030 #ifdef CONFIG_IWL4965_DEBUG
5031         if (iwl4965_debug_level & IWL_DL_FW_ERRORS) {
5032                 iwl4965_dump_nic_error_log(priv);
5033                 iwl4965_dump_nic_event_log(priv);
5034                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
5035         }
5036 #endif
5037
5038         wake_up_interruptible(&priv->wait_command_queue);
5039
5040         /* Keep the restart process from trying to send host
5041          * commands by clearing the INIT status bit */
5042         clear_bit(STATUS_READY, &priv->status);
5043
5044         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5045                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
5046                           "Restarting adapter due to uCode error.\n");
5047
5048                 if (iwl4965_is_associated(priv)) {
5049                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
5050                                sizeof(priv->recovery_rxon));
5051                         priv->error_recovering = 1;
5052                 }
5053                 queue_work(priv->workqueue, &priv->restart);
5054         }
5055 }
5056
5057 static void iwl4965_error_recovery(struct iwl4965_priv *priv)
5058 {
5059         unsigned long flags;
5060
5061         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
5062                sizeof(priv->staging_rxon));
5063         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5064         iwl4965_commit_rxon(priv);
5065
5066         iwl4965_rxon_add_station(priv, priv->bssid, 1);
5067
5068         spin_lock_irqsave(&priv->lock, flags);
5069         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
5070         priv->error_recovering = 0;
5071         spin_unlock_irqrestore(&priv->lock, flags);
5072 }
5073
5074 static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
5075 {
5076         u32 inta, handled = 0;
5077         u32 inta_fh;
5078         unsigned long flags;
5079 #ifdef CONFIG_IWL4965_DEBUG
5080         u32 inta_mask;
5081 #endif
5082
5083         spin_lock_irqsave(&priv->lock, flags);
5084
5085         /* Ack/clear/reset pending uCode interrupts.
5086          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
5087          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
5088         inta = iwl4965_read32(priv, CSR_INT);
5089         iwl4965_write32(priv, CSR_INT, inta);
5090
5091         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
5092          * Any new interrupts that happen after this, either while we're
5093          * in this tasklet, or later, will show up in next ISR/tasklet. */
5094         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5095         iwl4965_write32(priv, CSR_FH_INT_STATUS, inta_fh);
5096
5097 #ifdef CONFIG_IWL4965_DEBUG
5098         if (iwl4965_debug_level & IWL_DL_ISR) {
5099                 /* just for debug */
5100                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5101                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5102                               inta, inta_mask, inta_fh);
5103         }
5104 #endif
5105
5106         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5107          * atomic, make sure that inta covers all the interrupts that
5108          * we've discovered, even if FH interrupt came in just after
5109          * reading CSR_INT. */
5110         if (inta_fh & CSR_FH_INT_RX_MASK)
5111                 inta |= CSR_INT_BIT_FH_RX;
5112         if (inta_fh & CSR_FH_INT_TX_MASK)
5113                 inta |= CSR_INT_BIT_FH_TX;
5114
5115         /* Now service all interrupt bits discovered above. */
5116         if (inta & CSR_INT_BIT_HW_ERR) {
5117                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
5118
5119                 /* Tell the device to stop sending interrupts */
5120                 iwl4965_disable_interrupts(priv);
5121
5122                 iwl4965_irq_handle_error(priv);
5123
5124                 handled |= CSR_INT_BIT_HW_ERR;
5125
5126                 spin_unlock_irqrestore(&priv->lock, flags);
5127
5128                 return;
5129         }
5130
5131 #ifdef CONFIG_IWL4965_DEBUG
5132         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5133                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5134                 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
5135                         IWL_DEBUG_ISR("Microcode started or stopped.\n");
5136
5137                 /* Alive notification via Rx interrupt will do the real work */
5138                 if (inta & CSR_INT_BIT_ALIVE)
5139                         IWL_DEBUG_ISR("Alive interrupt\n");
5140         }
5141 #endif
5142         /* Safely ignore these bits for debug checks below */
5143         inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
5144
5145         /* HW RF KILL switch toggled */
5146         if (inta & CSR_INT_BIT_RF_KILL) {
5147                 int hw_rf_kill = 0;
5148                 if (!(iwl4965_read32(priv, CSR_GP_CNTRL) &
5149                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5150                         hw_rf_kill = 1;
5151
5152                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5153                                 "RF_KILL bit toggled to %s.\n",
5154                                 hw_rf_kill ? "disable radio":"enable radio");
5155
5156                 /* Queue restart only if RF_KILL switch was set to "kill"
5157                  *   when we loaded driver, and is now set to "enable".
5158                  * After we're Alive, RF_KILL gets handled by
5159                  *   iwl_rx_card_state_notif() */
5160                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
5161                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
5162                         queue_work(priv->workqueue, &priv->restart);
5163                 }
5164
5165                 handled |= CSR_INT_BIT_RF_KILL;
5166         }
5167
5168         /* Chip got too hot and stopped itself */
5169         if (inta & CSR_INT_BIT_CT_KILL) {
5170                 IWL_ERROR("Microcode CT kill error detected.\n");
5171                 handled |= CSR_INT_BIT_CT_KILL;
5172         }
5173
5174         /* Error detected by uCode */
5175         if (inta & CSR_INT_BIT_SW_ERR) {
5176                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
5177                           inta);
5178                 iwl4965_irq_handle_error(priv);
5179                 handled |= CSR_INT_BIT_SW_ERR;
5180         }
5181
5182         /* uCode wakes up after power-down sleep */
5183         if (inta & CSR_INT_BIT_WAKEUP) {
5184                 IWL_DEBUG_ISR("Wakeup interrupt\n");
5185                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
5186                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5187                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5188                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5189                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5190                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5191                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5192
5193                 handled |= CSR_INT_BIT_WAKEUP;
5194         }
5195
5196         /* All uCode command responses, including Tx command responses,
5197          * Rx "responses" (frame-received notification), and other
5198          * notifications from uCode come through here*/
5199         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5200                 iwl4965_rx_handle(priv);
5201                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5202         }
5203
5204         if (inta & CSR_INT_BIT_FH_TX) {
5205                 IWL_DEBUG_ISR("Tx interrupt\n");
5206                 handled |= CSR_INT_BIT_FH_TX;
5207         }
5208
5209         if (inta & ~handled)
5210                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5211
5212         if (inta & ~CSR_INI_SET_MASK) {
5213                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5214                          inta & ~CSR_INI_SET_MASK);
5215                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
5216         }
5217
5218         /* Re-enable all interrupts */
5219         iwl4965_enable_interrupts(priv);
5220
5221 #ifdef CONFIG_IWL4965_DEBUG
5222         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5223                 inta = iwl4965_read32(priv, CSR_INT);
5224                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5225                 inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5226                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5227                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5228         }
5229 #endif
5230         spin_unlock_irqrestore(&priv->lock, flags);
5231 }
5232
5233 static irqreturn_t iwl4965_isr(int irq, void *data)
5234 {
5235         struct iwl4965_priv *priv = data;
5236         u32 inta, inta_mask;
5237         u32 inta_fh;
5238         if (!priv)
5239                 return IRQ_NONE;
5240
5241         spin_lock(&priv->lock);
5242
5243         /* Disable (but don't clear!) interrupts here to avoid
5244          *    back-to-back ISRs and sporadic interrupts from our NIC.
5245          * If we have something to service, the tasklet will re-enable ints.
5246          * If we *don't* have something, we'll re-enable before leaving here. */
5247         inta_mask = iwl4965_read32(priv, CSR_INT_MASK);  /* just for debug */
5248         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
5249
5250         /* Discover which interrupts are active/pending */
5251         inta = iwl4965_read32(priv, CSR_INT);
5252         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5253
5254         /* Ignore interrupt if there's nothing in NIC to service.
5255          * This may be due to IRQ shared with another device,
5256          * or due to sporadic interrupts thrown from our NIC. */
5257         if (!inta && !inta_fh) {
5258                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5259                 goto none;
5260         }
5261
5262         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5263                 /* Hardware disappeared. It might have already raised
5264                  * an interrupt */
5265                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5266                 goto unplugged;
5267         }
5268
5269         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5270                       inta, inta_mask, inta_fh);
5271
5272         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
5273         tasklet_schedule(&priv->irq_tasklet);
5274
5275  unplugged:
5276         spin_unlock(&priv->lock);
5277         return IRQ_HANDLED;
5278
5279  none:
5280         /* re-enable interrupts here since we don't have anything to service. */
5281         iwl4965_enable_interrupts(priv);
5282         spin_unlock(&priv->lock);
5283         return IRQ_NONE;
5284 }
5285
5286 /************************** EEPROM BANDS ****************************
5287  *
5288  * The iwl4965_eeprom_band definitions below provide the mapping from the
5289  * EEPROM contents to the specific channel number supported for each
5290  * band.
5291  *
5292  * For example, iwl4965_priv->eeprom.band_3_channels[4] from the band_3
5293  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5294  * The specific geography and calibration information for that channel
5295  * is contained in the eeprom map itself.
5296  *
5297  * During init, we copy the eeprom information and channel map
5298  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5299  *
5300  * channel_map_24/52 provides the index in the channel_info array for a
5301  * given channel.  We have to have two separate maps as there is channel
5302  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5303  * band_2
5304  *
5305  * A value of 0xff stored in the channel_map indicates that the channel
5306  * is not supported by the hardware at all.
5307  *
5308  * A value of 0xfe in the channel_map indicates that the channel is not
5309  * valid for Tx with the current hardware.  This means that
5310  * while the system can tune and receive on a given channel, it may not
5311  * be able to associate or transmit any frames on that
5312  * channel.  There is no corresponding channel information for that
5313  * entry.
5314  *
5315  *********************************************************************/
5316
5317 /* 2.4 GHz */
5318 static const u8 iwl4965_eeprom_band_1[14] = {
5319         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5320 };
5321
5322 /* 5.2 GHz bands */
5323 static const u8 iwl4965_eeprom_band_2[] = {     /* 4915-5080MHz */
5324         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5325 };
5326
5327 static const u8 iwl4965_eeprom_band_3[] = {     /* 5170-5320MHz */
5328         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5329 };
5330
5331 static const u8 iwl4965_eeprom_band_4[] = {     /* 5500-5700MHz */
5332         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5333 };
5334
5335 static const u8 iwl4965_eeprom_band_5[] = {     /* 5725-5825MHz */
5336         145, 149, 153, 157, 161, 165
5337 };
5338
5339 static u8 iwl4965_eeprom_band_6[] = {       /* 2.4 FAT channel */
5340         1, 2, 3, 4, 5, 6, 7
5341 };
5342
5343 static u8 iwl4965_eeprom_band_7[] = {       /* 5.2 FAT channel */
5344         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5345 };
5346
5347 static void iwl4965_init_band_reference(const struct iwl4965_priv *priv,
5348                                     int band,
5349                                     int *eeprom_ch_count,
5350                                     const struct iwl4965_eeprom_channel
5351                                     **eeprom_ch_info,
5352                                     const u8 **eeprom_ch_index)
5353 {
5354         switch (band) {
5355         case 1:         /* 2.4GHz band */
5356                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_1);
5357                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5358                 *eeprom_ch_index = iwl4965_eeprom_band_1;
5359                 break;
5360         case 2:         /* 4.9GHz band */
5361                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_2);
5362                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5363                 *eeprom_ch_index = iwl4965_eeprom_band_2;
5364                 break;
5365         case 3:         /* 5.2GHz band */
5366                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_3);
5367                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5368                 *eeprom_ch_index = iwl4965_eeprom_band_3;
5369                 break;
5370         case 4:         /* 5.5GHz band */
5371                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_4);
5372                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5373                 *eeprom_ch_index = iwl4965_eeprom_band_4;
5374                 break;
5375         case 5:         /* 5.7GHz band */
5376                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_5);
5377                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5378                 *eeprom_ch_index = iwl4965_eeprom_band_5;
5379                 break;
5380         case 6:         /* 2.4GHz FAT channels */
5381                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_6);
5382                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5383                 *eeprom_ch_index = iwl4965_eeprom_band_6;
5384                 break;
5385         case 7:         /* 5 GHz FAT channels */
5386                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_7);
5387                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5388                 *eeprom_ch_index = iwl4965_eeprom_band_7;
5389                 break;
5390         default:
5391                 BUG();
5392                 return;
5393         }
5394 }
5395
5396 /**
5397  * iwl4965_get_channel_info - Find driver's private channel info
5398  *
5399  * Based on band and channel number.
5400  */
5401 const struct iwl4965_channel_info *iwl4965_get_channel_info(const struct iwl4965_priv *priv,
5402                                                     int phymode, u16 channel)
5403 {
5404         int i;
5405
5406         switch (phymode) {
5407         case MODE_IEEE80211A:
5408                 for (i = 14; i < priv->channel_count; i++) {
5409                         if (priv->channel_info[i].channel == channel)
5410                                 return &priv->channel_info[i];
5411                 }
5412                 break;
5413
5414         case MODE_IEEE80211B:
5415         case MODE_IEEE80211G:
5416                 if (channel >= 1 && channel <= 14)
5417                         return &priv->channel_info[channel - 1];
5418                 break;
5419
5420         }
5421
5422         return NULL;
5423 }
5424
5425 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5426                             ? # x " " : "")
5427
5428 /**
5429  * iwl4965_init_channel_map - Set up driver's info for all possible channels
5430  */
5431 static int iwl4965_init_channel_map(struct iwl4965_priv *priv)
5432 {
5433         int eeprom_ch_count = 0;
5434         const u8 *eeprom_ch_index = NULL;
5435         const struct iwl4965_eeprom_channel *eeprom_ch_info = NULL;
5436         int band, ch;
5437         struct iwl4965_channel_info *ch_info;
5438
5439         if (priv->channel_count) {
5440                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5441                 return 0;
5442         }
5443
5444         if (priv->eeprom.version < 0x2f) {
5445                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5446                             priv->eeprom.version);
5447                 return -EINVAL;
5448         }
5449
5450         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5451
5452         priv->channel_count =
5453             ARRAY_SIZE(iwl4965_eeprom_band_1) +
5454             ARRAY_SIZE(iwl4965_eeprom_band_2) +
5455             ARRAY_SIZE(iwl4965_eeprom_band_3) +
5456             ARRAY_SIZE(iwl4965_eeprom_band_4) +
5457             ARRAY_SIZE(iwl4965_eeprom_band_5);
5458
5459         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5460
5461         priv->channel_info = kzalloc(sizeof(struct iwl4965_channel_info) *
5462                                      priv->channel_count, GFP_KERNEL);
5463         if (!priv->channel_info) {
5464                 IWL_ERROR("Could not allocate channel_info\n");
5465                 priv->channel_count = 0;
5466                 return -ENOMEM;
5467         }
5468
5469         ch_info = priv->channel_info;
5470
5471         /* Loop through the 5 EEPROM bands adding them in order to the
5472          * channel map we maintain (that contains additional information than
5473          * what just in the EEPROM) */
5474         for (band = 1; band <= 5; band++) {
5475
5476                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5477                                         &eeprom_ch_info, &eeprom_ch_index);
5478
5479                 /* Loop through each band adding each of the channels */
5480                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5481                         ch_info->channel = eeprom_ch_index[ch];
5482                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5483                             MODE_IEEE80211A;
5484
5485                         /* permanently store EEPROM's channel regulatory flags
5486                          *   and max power in channel info database. */
5487                         ch_info->eeprom = eeprom_ch_info[ch];
5488
5489                         /* Copy the run-time flags so they are there even on
5490                          * invalid channels */
5491                         ch_info->flags = eeprom_ch_info[ch].flags;
5492
5493                         if (!(is_channel_valid(ch_info))) {
5494                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5495                                                "No traffic\n",
5496                                                ch_info->channel,
5497                                                ch_info->flags,
5498                                                is_channel_a_band(ch_info) ?
5499                                                "5.2" : "2.4");
5500                                 ch_info++;
5501                                 continue;
5502                         }
5503
5504                         /* Initialize regulatory-based run-time data */
5505                         ch_info->max_power_avg = ch_info->curr_txpow =
5506                             eeprom_ch_info[ch].max_power_avg;
5507                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5508                         ch_info->min_power = 0;
5509
5510                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5511                                        " %ddBm): Ad-Hoc %ssupported\n",
5512                                        ch_info->channel,
5513                                        is_channel_a_band(ch_info) ?
5514                                        "5.2" : "2.4",
5515                                        CHECK_AND_PRINT(IBSS),
5516                                        CHECK_AND_PRINT(ACTIVE),
5517                                        CHECK_AND_PRINT(RADAR),
5518                                        CHECK_AND_PRINT(WIDE),
5519                                        CHECK_AND_PRINT(NARROW),
5520                                        CHECK_AND_PRINT(DFS),
5521                                        eeprom_ch_info[ch].flags,
5522                                        eeprom_ch_info[ch].max_power_avg,
5523                                        ((eeprom_ch_info[ch].
5524                                          flags & EEPROM_CHANNEL_IBSS)
5525                                         && !(eeprom_ch_info[ch].
5526                                              flags & EEPROM_CHANNEL_RADAR))
5527                                        ? "" : "not ");
5528
5529                         /* Set the user_txpower_limit to the highest power
5530                          * supported by any channel */
5531                         if (eeprom_ch_info[ch].max_power_avg >
5532                             priv->user_txpower_limit)
5533                                 priv->user_txpower_limit =
5534                                     eeprom_ch_info[ch].max_power_avg;
5535
5536                         ch_info++;
5537                 }
5538         }
5539
5540         /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
5541         for (band = 6; band <= 7; band++) {
5542                 int phymode;
5543                 u8 fat_extension_chan;
5544
5545                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5546                                         &eeprom_ch_info, &eeprom_ch_index);
5547
5548                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
5549                 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5550
5551                 /* Loop through each band adding each of the channels */
5552                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5553
5554                         if ((band == 6) &&
5555                             ((eeprom_ch_index[ch] == 5) ||
5556                             (eeprom_ch_index[ch] == 6) ||
5557                             (eeprom_ch_index[ch] == 7)))
5558                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5559                         else
5560                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5561
5562                         /* Set up driver's info for lower half */
5563                         iwl4965_set_fat_chan_info(priv, phymode,
5564                                                   eeprom_ch_index[ch],
5565                                                   &(eeprom_ch_info[ch]),
5566                                                   fat_extension_chan);
5567
5568                         /* Set up driver's info for upper half */
5569                         iwl4965_set_fat_chan_info(priv, phymode,
5570                                                   (eeprom_ch_index[ch] + 4),
5571                                                   &(eeprom_ch_info[ch]),
5572                                                   HT_IE_EXT_CHANNEL_BELOW);
5573                 }
5574         }
5575
5576         return 0;
5577 }
5578
5579 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5580  * sending probe req.  This should be set long enough to hear probe responses
5581  * from more than one AP.  */
5582 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5583 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5584
5585 /* For faster active scanning, scan will move to the next channel if fewer than
5586  * PLCP_QUIET_THRESH packets are heard on this channel within
5587  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5588  * time if it's a quiet channel (nothing responded to our probe, and there's
5589  * no other traffic).
5590  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5591 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5592 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5593
5594 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5595  * Must be set longer than active dwell time.
5596  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5597 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5598 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5599 #define IWL_PASSIVE_DWELL_BASE      (100)
5600 #define IWL_CHANNEL_TUNE_TIME       5
5601
5602 static inline u16 iwl4965_get_active_dwell_time(struct iwl4965_priv *priv, int phymode)
5603 {
5604         if (phymode == MODE_IEEE80211A)
5605                 return IWL_ACTIVE_DWELL_TIME_52;
5606         else
5607                 return IWL_ACTIVE_DWELL_TIME_24;
5608 }
5609
5610 static u16 iwl4965_get_passive_dwell_time(struct iwl4965_priv *priv, int phymode)
5611 {
5612         u16 active = iwl4965_get_active_dwell_time(priv, phymode);
5613         u16 passive = (phymode != MODE_IEEE80211A) ?
5614             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5615             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5616
5617         if (iwl4965_is_associated(priv)) {
5618                 /* If we're associated, we clamp the maximum passive
5619                  * dwell time to be 98% of the beacon interval (minus
5620                  * 2 * channel tune time) */
5621                 passive = priv->beacon_int;
5622                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5623                         passive = IWL_PASSIVE_DWELL_BASE;
5624                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5625         }
5626
5627         if (passive <= active)
5628                 passive = active + 1;
5629
5630         return passive;
5631 }
5632
5633 static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv, int phymode,
5634                                      u8 is_active, u8 direct_mask,
5635                                      struct iwl4965_scan_channel *scan_ch)
5636 {
5637         const struct ieee80211_channel *channels = NULL;
5638         const struct ieee80211_hw_mode *hw_mode;
5639         const struct iwl4965_channel_info *ch_info;
5640         u16 passive_dwell = 0;
5641         u16 active_dwell = 0;
5642         int added, i;
5643
5644         hw_mode = iwl4965_get_hw_mode(priv, phymode);
5645         if (!hw_mode)
5646                 return 0;
5647
5648         channels = hw_mode->channels;
5649
5650         active_dwell = iwl4965_get_active_dwell_time(priv, phymode);
5651         passive_dwell = iwl4965_get_passive_dwell_time(priv, phymode);
5652
5653         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5654                 if (channels[i].chan ==
5655                     le16_to_cpu(priv->active_rxon.channel)) {
5656                         if (iwl4965_is_associated(priv)) {
5657                                 IWL_DEBUG_SCAN
5658                                     ("Skipping current channel %d\n",
5659                                      le16_to_cpu(priv->active_rxon.channel));
5660                                 continue;
5661                         }
5662                 } else if (priv->only_active_channel)
5663                         continue;
5664
5665                 scan_ch->channel = channels[i].chan;
5666
5667                 ch_info = iwl4965_get_channel_info(priv, phymode,
5668                                          scan_ch->channel);
5669                 if (!is_channel_valid(ch_info)) {
5670                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5671                                        scan_ch->channel);
5672                         continue;
5673                 }
5674
5675                 if (!is_active || is_channel_passive(ch_info) ||
5676                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5677                         scan_ch->type = 0;      /* passive */
5678                 else
5679                         scan_ch->type = 1;      /* active */
5680
5681                 if (scan_ch->type & 1)
5682                         scan_ch->type |= (direct_mask << 1);
5683
5684                 if (is_channel_narrow(ch_info))
5685                         scan_ch->type |= (1 << 7);
5686
5687                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5688                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5689
5690                 /* Set txpower levels to defaults */
5691                 scan_ch->tpc.dsp_atten = 110;
5692                 /* scan_pwr_info->tpc.dsp_atten; */
5693
5694                 /*scan_pwr_info->tpc.tx_gain; */
5695                 if (phymode == MODE_IEEE80211A)
5696                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5697                 else {
5698                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5699                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5700                          * power level:
5701                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5702                          */
5703                 }
5704
5705                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5706                                scan_ch->channel,
5707                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5708                                (scan_ch->type & 1) ?
5709                                active_dwell : passive_dwell);
5710
5711                 scan_ch++;
5712                 added++;
5713         }
5714
5715         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5716         return added;
5717 }
5718
5719 static void iwl4965_reset_channel_flag(struct iwl4965_priv *priv)
5720 {
5721         int i, j;
5722         for (i = 0; i < 3; i++) {
5723                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5724                 for (j = 0; j < hw_mode->num_channels; j++)
5725                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5726         }
5727 }
5728
5729 static void iwl4965_init_hw_rates(struct iwl4965_priv *priv,
5730                               struct ieee80211_rate *rates)
5731 {
5732         int i;
5733
5734         for (i = 0; i < IWL_RATE_COUNT; i++) {
5735                 rates[i].rate = iwl4965_rates[i].ieee * 5;
5736                 rates[i].val = i; /* Rate scaling will work on indexes */
5737                 rates[i].val2 = i;
5738                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5739                 /* Only OFDM have the bits-per-symbol set */
5740                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5741                         rates[i].flags |= IEEE80211_RATE_OFDM;
5742                 else {
5743                         /*
5744                          * If CCK 1M then set rate flag to CCK else CCK_2
5745                          * which is CCK | PREAMBLE2
5746                          */
5747                         rates[i].flags |= (iwl4965_rates[i].plcp == 10) ?
5748                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5749                 }
5750
5751                 /* Set up which ones are basic rates... */
5752                 if (IWL_BASIC_RATES_MASK & (1 << i))
5753                         rates[i].flags |= IEEE80211_RATE_BASIC;
5754         }
5755 }
5756
5757 /**
5758  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
5759  */
5760 static int iwl4965_init_geos(struct iwl4965_priv *priv)
5761 {
5762         struct iwl4965_channel_info *ch;
5763         struct ieee80211_hw_mode *modes;
5764         struct ieee80211_channel *channels;
5765         struct ieee80211_channel *geo_ch;
5766         struct ieee80211_rate *rates;
5767         int i = 0;
5768         enum {
5769                 A = 0,
5770                 B = 1,
5771                 G = 2,
5772         };
5773         int mode_count = 3;
5774
5775         if (priv->modes) {
5776                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5777                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5778                 return 0;
5779         }
5780
5781         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5782                         GFP_KERNEL);
5783         if (!modes)
5784                 return -ENOMEM;
5785
5786         channels = kzalloc(sizeof(struct ieee80211_channel) *
5787                            priv->channel_count, GFP_KERNEL);
5788         if (!channels) {
5789                 kfree(modes);
5790                 return -ENOMEM;
5791         }
5792
5793         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5794                         GFP_KERNEL);
5795         if (!rates) {
5796                 kfree(modes);
5797                 kfree(channels);
5798                 return -ENOMEM;
5799         }
5800
5801         /* 0 = 802.11a
5802          * 1 = 802.11b
5803          * 2 = 802.11g
5804          */
5805
5806         /* 5.2GHz channels start after the 2.4GHz channels */
5807         modes[A].mode = MODE_IEEE80211A;
5808         modes[A].channels = &channels[ARRAY_SIZE(iwl4965_eeprom_band_1)];
5809         modes[A].rates = rates;
5810         modes[A].num_rates = 8; /* just OFDM */
5811         modes[A].rates = &rates[4];
5812         modes[A].num_channels = 0;
5813 #ifdef CONFIG_IWL4965_HT
5814         iwl4965_init_ht_hw_capab(&modes[A].ht_info, MODE_IEEE80211A);
5815 #endif
5816
5817         modes[B].mode = MODE_IEEE80211B;
5818         modes[B].channels = channels;
5819         modes[B].rates = rates;
5820         modes[B].num_rates = 4; /* just CCK */
5821         modes[B].num_channels = 0;
5822
5823         modes[G].mode = MODE_IEEE80211G;
5824         modes[G].channels = channels;
5825         modes[G].rates = rates;
5826         modes[G].num_rates = 12;        /* OFDM & CCK */
5827         modes[G].num_channels = 0;
5828 #ifdef CONFIG_IWL4965_HT
5829         iwl4965_init_ht_hw_capab(&modes[G].ht_info, MODE_IEEE80211G);
5830 #endif
5831
5832         priv->ieee_channels = channels;
5833         priv->ieee_rates = rates;
5834
5835         iwl4965_init_hw_rates(priv, rates);
5836
5837         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5838                 ch = &priv->channel_info[i];
5839
5840                 if (!is_channel_valid(ch)) {
5841                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5842                                     "skipping.\n",
5843                                     ch->channel, is_channel_a_band(ch) ?
5844                                     "5.2" : "2.4");
5845                         continue;
5846                 }
5847
5848                 if (is_channel_a_band(ch)) {
5849                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5850                 } else {
5851                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5852                         modes[G].num_channels++;
5853                 }
5854
5855                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5856                 geo_ch->chan = ch->channel;
5857                 geo_ch->power_level = ch->max_power_avg;
5858                 geo_ch->antenna_max = 0xff;
5859
5860                 if (is_channel_valid(ch)) {
5861                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5862                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5863                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5864
5865                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5866                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5867
5868                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5869                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5870
5871                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5872                                 priv->max_channel_txpower_limit =
5873                                     ch->max_power_avg;
5874                 }
5875
5876                 geo_ch->val = geo_ch->flag;
5877         }
5878
5879         if ((modes[A].num_channels == 0) && priv->is_abg) {
5880                 printk(KERN_INFO DRV_NAME
5881                        ": Incorrectly detected BG card as ABG.  Please send "
5882                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5883                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5884                 priv->is_abg = 0;
5885         }
5886
5887         printk(KERN_INFO DRV_NAME
5888                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5889                modes[G].num_channels, modes[A].num_channels);
5890
5891         /*
5892          * NOTE:  We register these in preference of order -- the
5893          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5894          * a phymode based on rates or AP capabilities but seems to
5895          * configure it purely on if the channel being configured
5896          * is supported by a mode -- and the first match is taken
5897          */
5898
5899         if (modes[G].num_channels)
5900                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5901         if (modes[B].num_channels)
5902                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5903         if (modes[A].num_channels)
5904                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5905
5906         priv->modes = modes;
5907         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5908
5909         return 0;
5910 }
5911
5912 /******************************************************************************
5913  *
5914  * uCode download functions
5915  *
5916  ******************************************************************************/
5917
5918 static void iwl4965_dealloc_ucode_pci(struct iwl4965_priv *priv)
5919 {
5920         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5921         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5922         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5923         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5924         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5925         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5926 }
5927
5928 /**
5929  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5930  *     looking at all data.
5931  */
5932 static int iwl4965_verify_inst_full(struct iwl4965_priv *priv, __le32 *image,
5933                                  u32 len)
5934 {
5935         u32 val;
5936         u32 save_len = len;
5937         int rc = 0;
5938         u32 errcnt;
5939
5940         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5941
5942         rc = iwl4965_grab_nic_access(priv);
5943         if (rc)
5944                 return rc;
5945
5946         iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5947
5948         errcnt = 0;
5949         for (; len > 0; len -= sizeof(u32), image++) {
5950                 /* read data comes through single port, auto-incr addr */
5951                 /* NOTE: Use the debugless read so we don't flood kernel log
5952                  * if IWL_DL_IO is set */
5953                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5954                 if (val != le32_to_cpu(*image)) {
5955                         IWL_ERROR("uCode INST section is invalid at "
5956                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5957                                   save_len - len, val, le32_to_cpu(*image));
5958                         rc = -EIO;
5959                         errcnt++;
5960                         if (errcnt >= 20)
5961                                 break;
5962                 }
5963         }
5964
5965         iwl4965_release_nic_access(priv);
5966
5967         if (!errcnt)
5968                 IWL_DEBUG_INFO
5969                     ("ucode image in INSTRUCTION memory is good\n");
5970
5971         return rc;
5972 }
5973
5974
5975 /**
5976  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
5977  *   using sample data 100 bytes apart.  If these sample points are good,
5978  *   it's a pretty good bet that everything between them is good, too.
5979  */
5980 static int iwl4965_verify_inst_sparse(struct iwl4965_priv *priv, __le32 *image, u32 len)
5981 {
5982         u32 val;
5983         int rc = 0;
5984         u32 errcnt = 0;
5985         u32 i;
5986
5987         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5988
5989         rc = iwl4965_grab_nic_access(priv);
5990         if (rc)
5991                 return rc;
5992
5993         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5994                 /* read data comes through single port, auto-incr addr */
5995                 /* NOTE: Use the debugless read so we don't flood kernel log
5996                  * if IWL_DL_IO is set */
5997                 iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5998                         i + RTC_INST_LOWER_BOUND);
5999                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
6000                 if (val != le32_to_cpu(*image)) {
6001 #if 0 /* Enable this if you want to see details */
6002                         IWL_ERROR("uCode INST section is invalid at "
6003                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
6004                                   i, val, *image);
6005 #endif
6006                         rc = -EIO;
6007                         errcnt++;
6008                         if (errcnt >= 3)
6009                                 break;
6010                 }
6011         }
6012
6013         iwl4965_release_nic_access(priv);
6014
6015         return rc;
6016 }
6017
6018
6019 /**
6020  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
6021  *    and verify its contents
6022  */
6023 static int iwl4965_verify_ucode(struct iwl4965_priv *priv)
6024 {
6025         __le32 *image;
6026         u32 len;
6027         int rc = 0;
6028
6029         /* Try bootstrap */
6030         image = (__le32 *)priv->ucode_boot.v_addr;
6031         len = priv->ucode_boot.len;
6032         rc = iwl4965_verify_inst_sparse(priv, image, len);
6033         if (rc == 0) {
6034                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
6035                 return 0;
6036         }
6037
6038         /* Try initialize */
6039         image = (__le32 *)priv->ucode_init.v_addr;
6040         len = priv->ucode_init.len;
6041         rc = iwl4965_verify_inst_sparse(priv, image, len);
6042         if (rc == 0) {
6043                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
6044                 return 0;
6045         }
6046
6047         /* Try runtime/protocol */
6048         image = (__le32 *)priv->ucode_code.v_addr;
6049         len = priv->ucode_code.len;
6050         rc = iwl4965_verify_inst_sparse(priv, image, len);
6051         if (rc == 0) {
6052                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
6053                 return 0;
6054         }
6055
6056         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
6057
6058         /* Since nothing seems to match, show first several data entries in
6059          * instruction SRAM, so maybe visual inspection will give a clue.
6060          * Selection of bootstrap image (vs. other images) is arbitrary. */
6061         image = (__le32 *)priv->ucode_boot.v_addr;
6062         len = priv->ucode_boot.len;
6063         rc = iwl4965_verify_inst_full(priv, image, len);
6064
6065         return rc;
6066 }
6067
6068
6069 /* check contents of special bootstrap uCode SRAM */
6070 static int iwl4965_verify_bsm(struct iwl4965_priv *priv)
6071 {
6072         __le32 *image = priv->ucode_boot.v_addr;
6073         u32 len = priv->ucode_boot.len;
6074         u32 reg;
6075         u32 val;
6076
6077         IWL_DEBUG_INFO("Begin verify bsm\n");
6078
6079         /* verify BSM SRAM contents */
6080         val = iwl4965_read_prph(priv, BSM_WR_DWCOUNT_REG);
6081         for (reg = BSM_SRAM_LOWER_BOUND;
6082              reg < BSM_SRAM_LOWER_BOUND + len;
6083              reg += sizeof(u32), image ++) {
6084                 val = iwl4965_read_prph(priv, reg);
6085                 if (val != le32_to_cpu(*image)) {
6086                         IWL_ERROR("BSM uCode verification failed at "
6087                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6088                                   BSM_SRAM_LOWER_BOUND,
6089                                   reg - BSM_SRAM_LOWER_BOUND, len,
6090                                   val, le32_to_cpu(*image));
6091                         return -EIO;
6092                 }
6093         }
6094
6095         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6096
6097         return 0;
6098 }
6099
6100 /**
6101  * iwl4965_load_bsm - Load bootstrap instructions
6102  *
6103  * BSM operation:
6104  *
6105  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6106  * in special SRAM that does not power down during RFKILL.  When powering back
6107  * up after power-saving sleeps (or during initial uCode load), the BSM loads
6108  * the bootstrap program into the on-board processor, and starts it.
6109  *
6110  * The bootstrap program loads (via DMA) instructions and data for a new
6111  * program from host DRAM locations indicated by the host driver in the
6112  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
6113  * automatically.
6114  *
6115  * When initializing the NIC, the host driver points the BSM to the
6116  * "initialize" uCode image.  This uCode sets up some internal data, then
6117  * notifies host via "initialize alive" that it is complete.
6118  *
6119  * The host then replaces the BSM_DRAM_* pointer values to point to the
6120  * normal runtime uCode instructions and a backup uCode data cache buffer
6121  * (filled initially with starting data values for the on-board processor),
6122  * then triggers the "initialize" uCode to load and launch the runtime uCode,
6123  * which begins normal operation.
6124  *
6125  * When doing a power-save shutdown, runtime uCode saves data SRAM into
6126  * the backup data cache in DRAM before SRAM is powered down.
6127  *
6128  * When powering back up, the BSM loads the bootstrap program.  This reloads
6129  * the runtime uCode instructions and the backup data cache into SRAM,
6130  * and re-launches the runtime uCode from where it left off.
6131  */
6132 static int iwl4965_load_bsm(struct iwl4965_priv *priv)
6133 {
6134         __le32 *image = priv->ucode_boot.v_addr;
6135         u32 len = priv->ucode_boot.len;
6136         dma_addr_t pinst;
6137         dma_addr_t pdata;
6138         u32 inst_len;
6139         u32 data_len;
6140         int rc;
6141         int i;
6142         u32 done;
6143         u32 reg_offset;
6144
6145         IWL_DEBUG_INFO("Begin load bsm\n");
6146
6147         /* make sure bootstrap program is no larger than BSM's SRAM size */
6148         if (len > IWL_MAX_BSM_SIZE)
6149                 return -EINVAL;
6150
6151         /* Tell bootstrap uCode where to find the "Initialize" uCode
6152          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
6153          * NOTE:  iwl4965_initialize_alive_start() will replace these values,
6154          *        after the "initialize" uCode has run, to point to
6155          *        runtime/protocol instructions and backup data cache. */
6156         pinst = priv->ucode_init.p_addr >> 4;
6157         pdata = priv->ucode_init_data.p_addr >> 4;
6158         inst_len = priv->ucode_init.len;
6159         data_len = priv->ucode_init_data.len;
6160
6161         rc = iwl4965_grab_nic_access(priv);
6162         if (rc)
6163                 return rc;
6164
6165         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6166         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6167         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6168         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6169
6170         /* Fill BSM memory with bootstrap instructions */
6171         for (reg_offset = BSM_SRAM_LOWER_BOUND;
6172              reg_offset < BSM_SRAM_LOWER_BOUND + len;
6173              reg_offset += sizeof(u32), image++)
6174                 _iwl4965_write_prph(priv, reg_offset,
6175                                           le32_to_cpu(*image));
6176
6177         rc = iwl4965_verify_bsm(priv);
6178         if (rc) {
6179                 iwl4965_release_nic_access(priv);
6180                 return rc;
6181         }
6182
6183         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6184         iwl4965_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
6185         iwl4965_write_prph(priv, BSM_WR_MEM_DST_REG,
6186                                  RTC_INST_LOWER_BOUND);
6187         iwl4965_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6188
6189         /* Load bootstrap code into instruction SRAM now,
6190          *   to prepare to load "initialize" uCode */
6191         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
6192                 BSM_WR_CTRL_REG_BIT_START);
6193
6194         /* Wait for load of bootstrap uCode to finish */
6195         for (i = 0; i < 100; i++) {
6196                 done = iwl4965_read_prph(priv, BSM_WR_CTRL_REG);
6197                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6198                         break;
6199                 udelay(10);
6200         }
6201         if (i < 100)
6202                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6203         else {
6204                 IWL_ERROR("BSM write did not complete!\n");
6205                 return -EIO;
6206         }
6207
6208         /* Enable future boot loads whenever power management unit triggers it
6209          *   (e.g. when powering back up after power-save shutdown) */
6210         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
6211                 BSM_WR_CTRL_REG_BIT_START_EN);
6212
6213         iwl4965_release_nic_access(priv);
6214
6215         return 0;
6216 }
6217
6218 static void iwl4965_nic_start(struct iwl4965_priv *priv)
6219 {
6220         /* Remove all resets to allow NIC to operate */
6221         iwl4965_write32(priv, CSR_RESET, 0);
6222 }
6223
6224
6225 /**
6226  * iwl4965_read_ucode - Read uCode images from disk file.
6227  *
6228  * Copy into buffers for card to fetch via bus-mastering
6229  */
6230 static int iwl4965_read_ucode(struct iwl4965_priv *priv)
6231 {
6232         struct iwl4965_ucode *ucode;
6233         int ret;
6234         const struct firmware *ucode_raw;
6235         const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6236         u8 *src;
6237         size_t len;
6238         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6239
6240         /* Ask kernel firmware_class module to get the boot firmware off disk.
6241          * request_firmware() is synchronous, file is in memory on return. */
6242         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6243         if (ret < 0) {
6244                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
6245                                         name, ret);
6246                 goto error;
6247         }
6248
6249         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6250                        name, ucode_raw->size);
6251
6252         /* Make sure that we got at least our header! */
6253         if (ucode_raw->size < sizeof(*ucode)) {
6254                 IWL_ERROR("File size way too small!\n");
6255                 ret = -EINVAL;
6256                 goto err_release;
6257         }
6258
6259         /* Data from ucode file:  header followed by uCode images */
6260         ucode = (void *)ucode_raw->data;
6261
6262         ver = le32_to_cpu(ucode->ver);
6263         inst_size = le32_to_cpu(ucode->inst_size);
6264         data_size = le32_to_cpu(ucode->data_size);
6265         init_size = le32_to_cpu(ucode->init_size);
6266         init_data_size = le32_to_cpu(ucode->init_data_size);
6267         boot_size = le32_to_cpu(ucode->boot_size);
6268
6269         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6270         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6271                        inst_size);
6272         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6273                        data_size);
6274         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6275                        init_size);
6276         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6277                        init_data_size);
6278         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6279                        boot_size);
6280
6281         /* Verify size of file vs. image size info in file's header */
6282         if (ucode_raw->size < sizeof(*ucode) +
6283                 inst_size + data_size + init_size +
6284                 init_data_size + boot_size) {
6285
6286                 IWL_DEBUG_INFO("uCode file size %d too small\n",
6287                                (int)ucode_raw->size);
6288                 ret = -EINVAL;
6289                 goto err_release;
6290         }
6291
6292         /* Verify that uCode images will fit in card's SRAM */
6293         if (inst_size > IWL_MAX_INST_SIZE) {
6294                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
6295                                inst_size);
6296                 ret = -EINVAL;
6297                 goto err_release;
6298         }
6299
6300         if (data_size > IWL_MAX_DATA_SIZE) {
6301                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
6302                                 data_size);
6303                 ret = -EINVAL;
6304                 goto err_release;
6305         }
6306         if (init_size > IWL_MAX_INST_SIZE) {
6307                 IWL_DEBUG_INFO
6308                     ("uCode init instr len %d too large to fit in\n",
6309                       init_size);
6310                 ret = -EINVAL;
6311                 goto err_release;
6312         }
6313         if (init_data_size > IWL_MAX_DATA_SIZE) {
6314                 IWL_DEBUG_INFO
6315                     ("uCode init data len %d too large to fit in\n",
6316                       init_data_size);
6317                 ret = -EINVAL;
6318                 goto err_release;
6319         }
6320         if (boot_size > IWL_MAX_BSM_SIZE) {
6321                 IWL_DEBUG_INFO
6322                     ("uCode boot instr len %d too large to fit in\n",
6323                       boot_size);
6324                 ret = -EINVAL;
6325                 goto err_release;
6326         }
6327
6328         /* Allocate ucode buffers for card's bus-master loading ... */
6329
6330         /* Runtime instructions and 2 copies of data:
6331          * 1) unmodified from disk
6332          * 2) backup cache for save/restore during power-downs */
6333         priv->ucode_code.len = inst_size;
6334         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
6335
6336         priv->ucode_data.len = data_size;
6337         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
6338
6339         priv->ucode_data_backup.len = data_size;
6340         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
6341
6342         /* Initialization instructions and data */
6343         if (init_size && init_data_size) {
6344                 priv->ucode_init.len = init_size;
6345                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
6346
6347                 priv->ucode_init_data.len = init_data_size;
6348                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
6349
6350                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
6351                         goto err_pci_alloc;
6352         }
6353
6354         /* Bootstrap (instructions only, no data) */
6355         if (boot_size) {
6356                 priv->ucode_boot.len = boot_size;
6357                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
6358
6359                 if (!priv->ucode_boot.v_addr)
6360                         goto err_pci_alloc;
6361         }
6362
6363         /* Copy images into buffers for card's bus-master reads ... */
6364
6365         /* Runtime instructions (first block of data in file) */
6366         src = &ucode->data[0];
6367         len = priv->ucode_code.len;
6368         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
6369         memcpy(priv->ucode_code.v_addr, src, len);
6370         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6371                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6372
6373         /* Runtime data (2nd block)
6374          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
6375         src = &ucode->data[inst_size];
6376         len = priv->ucode_data.len;
6377         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
6378         memcpy(priv->ucode_data.v_addr, src, len);
6379         memcpy(priv->ucode_data_backup.v_addr, src, len);
6380
6381         /* Initialization instructions (3rd block) */
6382         if (init_size) {
6383                 src = &ucode->data[inst_size + data_size];
6384                 len = priv->ucode_init.len;
6385                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
6386                                 len);
6387                 memcpy(priv->ucode_init.v_addr, src, len);
6388         }
6389
6390         /* Initialization data (4th block) */
6391         if (init_data_size) {
6392                 src = &ucode->data[inst_size + data_size + init_size];
6393                 len = priv->ucode_init_data.len;
6394                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
6395                                len);
6396                 memcpy(priv->ucode_init_data.v_addr, src, len);
6397         }
6398
6399         /* Bootstrap instructions (5th block) */
6400         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6401         len = priv->ucode_boot.len;
6402         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
6403         memcpy(priv->ucode_boot.v_addr, src, len);
6404
6405         /* We have our copies now, allow OS release its copies */
6406         release_firmware(ucode_raw);
6407         return 0;
6408
6409  err_pci_alloc:
6410         IWL_ERROR("failed to allocate pci memory\n");
6411         ret = -ENOMEM;
6412         iwl4965_dealloc_ucode_pci(priv);
6413
6414  err_release:
6415         release_firmware(ucode_raw);
6416
6417  error:
6418         return ret;
6419 }
6420
6421
6422 /**
6423  * iwl4965_set_ucode_ptrs - Set uCode address location
6424  *
6425  * Tell initialization uCode where to find runtime uCode.
6426  *
6427  * BSM registers initially contain pointers to initialization uCode.
6428  * We need to replace them to load runtime uCode inst and data,
6429  * and to save runtime data when powering down.
6430  */
6431 static int iwl4965_set_ucode_ptrs(struct iwl4965_priv *priv)
6432 {
6433         dma_addr_t pinst;
6434         dma_addr_t pdata;
6435         int rc = 0;
6436         unsigned long flags;
6437
6438         /* bits 35:4 for 4965 */
6439         pinst = priv->ucode_code.p_addr >> 4;
6440         pdata = priv->ucode_data_backup.p_addr >> 4;
6441
6442         spin_lock_irqsave(&priv->lock, flags);
6443         rc = iwl4965_grab_nic_access(priv);
6444         if (rc) {
6445                 spin_unlock_irqrestore(&priv->lock, flags);
6446                 return rc;
6447         }
6448
6449         /* Tell bootstrap uCode where to find image to load */
6450         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6451         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6452         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6453                                  priv->ucode_data.len);
6454
6455         /* Inst bytecount must be last to set up, bit 31 signals uCode
6456          *   that all new ptr/size info is in place */
6457         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6458                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6459
6460         iwl4965_release_nic_access(priv);
6461
6462         spin_unlock_irqrestore(&priv->lock, flags);
6463
6464         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6465
6466         return rc;
6467 }
6468
6469 /**
6470  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
6471  *
6472  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6473  *
6474  * The 4965 "initialize" ALIVE reply contains calibration data for:
6475  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6476  *   (3945 does not contain this data).
6477  *
6478  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6479 */
6480 static void iwl4965_init_alive_start(struct iwl4965_priv *priv)
6481 {
6482         /* Check alive response for "valid" sign from uCode */
6483         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6484                 /* We had an error bringing up the hardware, so take it
6485                  * all the way back down so we can try again */
6486                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6487                 goto restart;
6488         }
6489
6490         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6491          * This is a paranoid check, because we would not have gotten the
6492          * "initialize" alive if code weren't properly loaded.  */
6493         if (iwl4965_verify_ucode(priv)) {
6494                 /* Runtime instruction load was bad;
6495                  * take it all the way back down so we can try again */
6496                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6497                 goto restart;
6498         }
6499
6500         /* Calculate temperature */
6501         priv->temperature = iwl4965_get_temperature(priv);
6502
6503         /* Send pointers to protocol/runtime uCode image ... init code will
6504          * load and launch runtime uCode, which will send us another "Alive"
6505          * notification. */
6506         IWL_DEBUG_INFO("Initialization Alive received.\n");
6507         if (iwl4965_set_ucode_ptrs(priv)) {
6508                 /* Runtime instruction load won't happen;
6509                  * take it all the way back down so we can try again */
6510                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6511                 goto restart;
6512         }
6513         return;
6514
6515  restart:
6516         queue_work(priv->workqueue, &priv->restart);
6517 }
6518
6519
6520 /**
6521  * iwl4965_alive_start - called after REPLY_ALIVE notification received
6522  *                   from protocol/runtime uCode (initialization uCode's
6523  *                   Alive gets handled by iwl4965_init_alive_start()).
6524  */
6525 static void iwl4965_alive_start(struct iwl4965_priv *priv)
6526 {
6527         int rc = 0;
6528
6529         IWL_DEBUG_INFO("Runtime Alive received.\n");
6530
6531         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6532                 /* We had an error bringing up the hardware, so take it
6533                  * all the way back down so we can try again */
6534                 IWL_DEBUG_INFO("Alive failed.\n");
6535                 goto restart;
6536         }
6537
6538         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6539          * This is a paranoid check, because we would not have gotten the
6540          * "runtime" alive if code weren't properly loaded.  */
6541         if (iwl4965_verify_ucode(priv)) {
6542                 /* Runtime instruction load was bad;
6543                  * take it all the way back down so we can try again */
6544                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6545                 goto restart;
6546         }
6547
6548         iwl4965_clear_stations_table(priv);
6549
6550         rc = iwl4965_alive_notify(priv);
6551         if (rc) {
6552                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6553                             rc);
6554                 goto restart;
6555         }
6556
6557         /* After the ALIVE response, we can send host commands to 4965 uCode */
6558         set_bit(STATUS_ALIVE, &priv->status);
6559
6560         /* Clear out the uCode error bit if it is set */
6561         clear_bit(STATUS_FW_ERROR, &priv->status);
6562
6563         rc = iwl4965_init_channel_map(priv);
6564         if (rc) {
6565                 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6566                 return;
6567         }
6568
6569         iwl4965_init_geos(priv);
6570         iwl4965_reset_channel_flag(priv);
6571
6572         if (iwl4965_is_rfkill(priv))
6573                 return;
6574
6575         ieee80211_start_queues(priv->hw);
6576
6577         priv->active_rate = priv->rates_mask;
6578         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6579
6580         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6581
6582         if (iwl4965_is_associated(priv)) {
6583                 struct iwl4965_rxon_cmd *active_rxon =
6584                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
6585
6586                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6587                        sizeof(priv->staging_rxon));
6588                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6589         } else {
6590                 /* Initialize our rx_config data */
6591                 iwl4965_connection_init_rx_config(priv);
6592                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6593         }
6594
6595         /* Configure Bluetooth device coexistence support */
6596         iwl4965_send_bt_config(priv);
6597
6598         /* Configure the adapter for unassociated operation */
6599         iwl4965_commit_rxon(priv);
6600
6601         /* At this point, the NIC is initialized and operational */
6602         priv->notif_missed_beacons = 0;
6603         set_bit(STATUS_READY, &priv->status);
6604
6605         iwl4965_rf_kill_ct_config(priv);
6606
6607         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6608         wake_up_interruptible(&priv->wait_command_queue);
6609
6610         if (priv->error_recovering)
6611                 iwl4965_error_recovery(priv);
6612
6613         return;
6614
6615  restart:
6616         queue_work(priv->workqueue, &priv->restart);
6617 }
6618
6619 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv);
6620
6621 static void __iwl4965_down(struct iwl4965_priv *priv)
6622 {
6623         unsigned long flags;
6624         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6625         struct ieee80211_conf *conf = NULL;
6626
6627         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6628
6629         conf = ieee80211_get_hw_conf(priv->hw);
6630
6631         if (!exit_pending)
6632                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6633
6634         iwl4965_clear_stations_table(priv);
6635
6636         /* Unblock any waiting calls */
6637         wake_up_interruptible_all(&priv->wait_command_queue);
6638
6639         /* Wipe out the EXIT_PENDING status bit if we are not actually
6640          * exiting the module */
6641         if (!exit_pending)
6642                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6643
6644         /* stop and reset the on-board processor */
6645         iwl4965_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6646
6647         /* tell the device to stop sending interrupts */
6648         iwl4965_disable_interrupts(priv);
6649
6650         if (priv->mac80211_registered)
6651                 ieee80211_stop_queues(priv->hw);
6652
6653         /* If we have not previously called iwl4965_init() then
6654          * clear all bits but the RF Kill and SUSPEND bits and return */
6655         if (!iwl4965_is_init(priv)) {
6656                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6657                                         STATUS_RF_KILL_HW |
6658                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6659                                         STATUS_RF_KILL_SW |
6660                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6661                                         STATUS_IN_SUSPEND;
6662                 goto exit;
6663         }
6664
6665         /* ...otherwise clear out all the status bits but the RF Kill and
6666          * SUSPEND bits and continue taking the NIC down. */
6667         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6668                                 STATUS_RF_KILL_HW |
6669                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6670                                 STATUS_RF_KILL_SW |
6671                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6672                                 STATUS_IN_SUSPEND |
6673                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6674                                 STATUS_FW_ERROR;
6675
6676         spin_lock_irqsave(&priv->lock, flags);
6677         iwl4965_clear_bit(priv, CSR_GP_CNTRL,
6678                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6679         spin_unlock_irqrestore(&priv->lock, flags);
6680
6681         iwl4965_hw_txq_ctx_stop(priv);
6682         iwl4965_hw_rxq_stop(priv);
6683
6684         spin_lock_irqsave(&priv->lock, flags);
6685         if (!iwl4965_grab_nic_access(priv)) {
6686                 iwl4965_write_prph(priv, APMG_CLK_DIS_REG,
6687                                          APMG_CLK_VAL_DMA_CLK_RQT);
6688                 iwl4965_release_nic_access(priv);
6689         }
6690         spin_unlock_irqrestore(&priv->lock, flags);
6691
6692         udelay(5);
6693
6694         iwl4965_hw_nic_stop_master(priv);
6695         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6696         iwl4965_hw_nic_reset(priv);
6697
6698  exit:
6699         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
6700
6701         if (priv->ibss_beacon)
6702                 dev_kfree_skb(priv->ibss_beacon);
6703         priv->ibss_beacon = NULL;
6704
6705         /* clear out any free frames */
6706         iwl4965_clear_free_frames(priv);
6707 }
6708
6709 static void iwl4965_down(struct iwl4965_priv *priv)
6710 {
6711         mutex_lock(&priv->mutex);
6712         __iwl4965_down(priv);
6713         mutex_unlock(&priv->mutex);
6714
6715         iwl4965_cancel_deferred_work(priv);
6716 }
6717
6718 #define MAX_HW_RESTARTS 5
6719
6720 static int __iwl4965_up(struct iwl4965_priv *priv)
6721 {
6722         int rc, i;
6723
6724         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6725                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6726                 return -EIO;
6727         }
6728
6729         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6730                 IWL_WARNING("Radio disabled by SW RF kill (module "
6731                             "parameter)\n");
6732                 return -ENODEV;
6733         }
6734
6735         /* If platform's RF_KILL switch is NOT set to KILL */
6736         if (iwl4965_read32(priv, CSR_GP_CNTRL) &
6737                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6738                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6739         else {
6740                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6741                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6742                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6743                         return -ENODEV;
6744                 }
6745         }
6746
6747         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6748                 IWL_ERROR("ucode not available for device bringup\n");
6749                 return -EIO;
6750         }
6751
6752         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6753
6754         rc = iwl4965_hw_nic_init(priv);
6755         if (rc) {
6756                 IWL_ERROR("Unable to int nic\n");
6757                 return rc;
6758         }
6759
6760         /* make sure rfkill handshake bits are cleared */
6761         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6762         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6763                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6764
6765         /* clear (again), then enable host interrupts */
6766         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6767         iwl4965_enable_interrupts(priv);
6768
6769         /* really make sure rfkill handshake bits are cleared */
6770         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6771         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6772
6773         /* Copy original ucode data image from disk into backup cache.
6774          * This will be used to initialize the on-board processor's
6775          * data SRAM for a clean start when the runtime program first loads. */
6776         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6777                priv->ucode_data.len);
6778
6779         /* We return success when we resume from suspend and rf_kill is on. */
6780         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6781                 return 0;
6782
6783         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6784
6785                 iwl4965_clear_stations_table(priv);
6786
6787                 /* load bootstrap state machine,
6788                  * load bootstrap program into processor's memory,
6789                  * prepare to load the "initialize" uCode */
6790                 rc = iwl4965_load_bsm(priv);
6791
6792                 if (rc) {
6793                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6794                         continue;
6795                 }
6796
6797                 /* start card; "initialize" will load runtime ucode */
6798                 iwl4965_nic_start(priv);
6799
6800                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6801
6802                 return 0;
6803         }
6804
6805         set_bit(STATUS_EXIT_PENDING, &priv->status);
6806         __iwl4965_down(priv);
6807
6808         /* tried to restart and config the device for as long as our
6809          * patience could withstand */
6810         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6811         return -EIO;
6812 }
6813
6814
6815 /*****************************************************************************
6816  *
6817  * Workqueue callbacks
6818  *
6819  *****************************************************************************/
6820
6821 static void iwl4965_bg_init_alive_start(struct work_struct *data)
6822 {
6823         struct iwl4965_priv *priv =
6824             container_of(data, struct iwl4965_priv, init_alive_start.work);
6825
6826         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6827                 return;
6828
6829         mutex_lock(&priv->mutex);
6830         iwl4965_init_alive_start(priv);
6831         mutex_unlock(&priv->mutex);
6832 }
6833
6834 static void iwl4965_bg_alive_start(struct work_struct *data)
6835 {
6836         struct iwl4965_priv *priv =
6837             container_of(data, struct iwl4965_priv, alive_start.work);
6838
6839         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6840                 return;
6841
6842         mutex_lock(&priv->mutex);
6843         iwl4965_alive_start(priv);
6844         mutex_unlock(&priv->mutex);
6845 }
6846
6847 static void iwl4965_bg_rf_kill(struct work_struct *work)
6848 {
6849         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, rf_kill);
6850
6851         wake_up_interruptible(&priv->wait_command_queue);
6852
6853         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6854                 return;
6855
6856         mutex_lock(&priv->mutex);
6857
6858         if (!iwl4965_is_rfkill(priv)) {
6859                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6860                           "HW and/or SW RF Kill no longer active, restarting "
6861                           "device\n");
6862                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6863                         queue_work(priv->workqueue, &priv->restart);
6864         } else {
6865
6866                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6867                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6868                                           "disabled by SW switch\n");
6869                 else
6870                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6871                                     "Kill switch must be turned off for "
6872                                     "wireless networking to work.\n");
6873         }
6874         mutex_unlock(&priv->mutex);
6875 }
6876
6877 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6878
6879 static void iwl4965_bg_scan_check(struct work_struct *data)
6880 {
6881         struct iwl4965_priv *priv =
6882             container_of(data, struct iwl4965_priv, scan_check.work);
6883
6884         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6885                 return;
6886
6887         mutex_lock(&priv->mutex);
6888         if (test_bit(STATUS_SCANNING, &priv->status) ||
6889             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6890                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6891                           "Scan completion watchdog resetting adapter (%dms)\n",
6892                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6893
6894                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6895                         iwl4965_send_scan_abort(priv);
6896         }
6897         mutex_unlock(&priv->mutex);
6898 }
6899
6900 static void iwl4965_bg_request_scan(struct work_struct *data)
6901 {
6902         struct iwl4965_priv *priv =
6903             container_of(data, struct iwl4965_priv, request_scan);
6904         struct iwl4965_host_cmd cmd = {
6905                 .id = REPLY_SCAN_CMD,
6906                 .len = sizeof(struct iwl4965_scan_cmd),
6907                 .meta.flags = CMD_SIZE_HUGE,
6908         };
6909         int rc = 0;
6910         struct iwl4965_scan_cmd *scan;
6911         struct ieee80211_conf *conf = NULL;
6912         u8 direct_mask;
6913         int phymode;
6914
6915         conf = ieee80211_get_hw_conf(priv->hw);
6916
6917         mutex_lock(&priv->mutex);
6918
6919         if (!iwl4965_is_ready(priv)) {
6920                 IWL_WARNING("request scan called when driver not ready.\n");
6921                 goto done;
6922         }
6923
6924         /* Make sure the scan wasn't cancelled before this queued work
6925          * was given the chance to run... */
6926         if (!test_bit(STATUS_SCANNING, &priv->status))
6927                 goto done;
6928
6929         /* This should never be called or scheduled if there is currently
6930          * a scan active in the hardware. */
6931         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6932                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6933                                "Ignoring second request.\n");
6934                 rc = -EIO;
6935                 goto done;
6936         }
6937
6938         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6939                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6940                 goto done;
6941         }
6942
6943         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6944                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6945                 goto done;
6946         }
6947
6948         if (iwl4965_is_rfkill(priv)) {
6949                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6950                 goto done;
6951         }
6952
6953         if (!test_bit(STATUS_READY, &priv->status)) {
6954                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6955                 goto done;
6956         }
6957
6958         if (!priv->scan_bands) {
6959                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6960                 goto done;
6961         }
6962
6963         if (!priv->scan) {
6964                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
6965                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6966                 if (!priv->scan) {
6967                         rc = -ENOMEM;
6968                         goto done;
6969                 }
6970         }
6971         scan = priv->scan;
6972         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
6973
6974         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6975         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6976
6977         if (iwl4965_is_associated(priv)) {
6978                 u16 interval = 0;
6979                 u32 extra;
6980                 u32 suspend_time = 100;
6981                 u32 scan_suspend_time = 100;
6982                 unsigned long flags;
6983
6984                 IWL_DEBUG_INFO("Scanning while associated...\n");
6985
6986                 spin_lock_irqsave(&priv->lock, flags);
6987                 interval = priv->beacon_int;
6988                 spin_unlock_irqrestore(&priv->lock, flags);
6989
6990                 scan->suspend_time = 0;
6991                 scan->max_out_time = cpu_to_le32(200 * 1024);
6992                 if (!interval)
6993                         interval = suspend_time;
6994
6995                 extra = (suspend_time / interval) << 22;
6996                 scan_suspend_time = (extra |
6997                     ((suspend_time % interval) * 1024));
6998                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6999                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
7000                                scan_suspend_time, interval);
7001         }
7002
7003         /* We should add the ability for user to lock to PASSIVE ONLY */
7004         if (priv->one_direct_scan) {
7005                 IWL_DEBUG_SCAN
7006                     ("Kicking off one direct scan for '%s'\n",
7007                      iwl4965_escape_essid(priv->direct_ssid,
7008                                       priv->direct_ssid_len));
7009                 scan->direct_scan[0].id = WLAN_EID_SSID;
7010                 scan->direct_scan[0].len = priv->direct_ssid_len;
7011                 memcpy(scan->direct_scan[0].ssid,
7012                        priv->direct_ssid, priv->direct_ssid_len);
7013                 direct_mask = 1;
7014         } else if (!iwl4965_is_associated(priv) && priv->essid_len) {
7015                 scan->direct_scan[0].id = WLAN_EID_SSID;
7016                 scan->direct_scan[0].len = priv->essid_len;
7017                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
7018                 direct_mask = 1;
7019         } else
7020                 direct_mask = 0;
7021
7022         /* We don't build a direct scan probe request; the uCode will do
7023          * that based on the direct_mask added to each channel entry */
7024         scan->tx_cmd.len = cpu_to_le16(
7025                 iwl4965_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
7026                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
7027         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
7028         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
7029         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
7030
7031         /* flags + rate selection */
7032
7033         scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
7034
7035         switch (priv->scan_bands) {
7036         case 2:
7037                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
7038                 scan->tx_cmd.rate_n_flags =
7039                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
7040                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
7041
7042                 scan->good_CRC_th = 0;
7043                 phymode = MODE_IEEE80211G;
7044                 break;
7045
7046         case 1:
7047                 scan->tx_cmd.rate_n_flags =
7048                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
7049                                 RATE_MCS_ANT_B_MSK);
7050                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7051                 phymode = MODE_IEEE80211A;
7052                 break;
7053
7054         default:
7055                 IWL_WARNING("Invalid scan band count\n");
7056                 goto done;
7057         }
7058
7059         /* select Rx chains */
7060
7061         /* Force use of chains B and C (0x6) for scan Rx.
7062          * Avoid A (0x1) because of its off-channel reception on A-band.
7063          * MIMO is not used here, but value is required to make uCode happy. */
7064         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7065                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7066                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7067                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7068
7069         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7070                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7071
7072         if (direct_mask)
7073                 IWL_DEBUG_SCAN
7074                     ("Initiating direct scan for %s.\n",
7075                      iwl4965_escape_essid(priv->essid, priv->essid_len));
7076         else
7077                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7078
7079         scan->channel_count =
7080                 iwl4965_get_channels_for_scan(
7081                         priv, phymode, 1, /* active */
7082                         direct_mask,
7083                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7084
7085         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7086             scan->channel_count * sizeof(struct iwl4965_scan_channel);
7087         cmd.data = scan;
7088         scan->len = cpu_to_le16(cmd.len);
7089
7090         set_bit(STATUS_SCAN_HW, &priv->status);
7091         rc = iwl4965_send_cmd_sync(priv, &cmd);
7092         if (rc)
7093                 goto done;
7094
7095         queue_delayed_work(priv->workqueue, &priv->scan_check,
7096                            IWL_SCAN_CHECK_WATCHDOG);
7097
7098         mutex_unlock(&priv->mutex);
7099         return;
7100
7101  done:
7102         /* inform mac80211 scan aborted */
7103         queue_work(priv->workqueue, &priv->scan_completed);
7104         mutex_unlock(&priv->mutex);
7105 }
7106
7107 static void iwl4965_bg_up(struct work_struct *data)
7108 {
7109         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, up);
7110
7111         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7112                 return;
7113
7114         mutex_lock(&priv->mutex);
7115         __iwl4965_up(priv);
7116         mutex_unlock(&priv->mutex);
7117 }
7118
7119 static void iwl4965_bg_restart(struct work_struct *data)
7120 {
7121         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, restart);
7122
7123         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7124                 return;
7125
7126         iwl4965_down(priv);
7127         queue_work(priv->workqueue, &priv->up);
7128 }
7129
7130 static void iwl4965_bg_rx_replenish(struct work_struct *data)
7131 {
7132         struct iwl4965_priv *priv =
7133             container_of(data, struct iwl4965_priv, rx_replenish);
7134
7135         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7136                 return;
7137
7138         mutex_lock(&priv->mutex);
7139         iwl4965_rx_replenish(priv);
7140         mutex_unlock(&priv->mutex);
7141 }
7142
7143 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7144
7145 static void iwl4965_bg_post_associate(struct work_struct *data)
7146 {
7147         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv,
7148                                              post_associate.work);
7149
7150         int rc = 0;
7151         struct ieee80211_conf *conf = NULL;
7152         DECLARE_MAC_BUF(mac);
7153
7154         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7155                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7156                 return;
7157         }
7158
7159         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7160                         priv->assoc_id,
7161                         print_mac(mac, priv->active_rxon.bssid_addr));
7162
7163
7164         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7165                 return;
7166
7167         mutex_lock(&priv->mutex);
7168
7169         if (!priv->vif || !priv->is_open) {
7170                 mutex_unlock(&priv->mutex);
7171                 return;
7172         }
7173         iwl4965_scan_cancel_timeout(priv, 200);
7174
7175         conf = ieee80211_get_hw_conf(priv->hw);
7176
7177         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7178         iwl4965_commit_rxon(priv);
7179
7180         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7181         iwl4965_setup_rxon_timing(priv);
7182         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7183                               sizeof(priv->rxon_timing), &priv->rxon_timing);
7184         if (rc)
7185                 IWL_WARNING("REPLY_RXON_TIMING failed - "
7186                             "Attempting to continue.\n");
7187
7188         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7189
7190 #ifdef CONFIG_IWL4965_HT
7191         if (priv->current_ht_config.is_ht)
7192                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
7193 #endif /* CONFIG_IWL4965_HT*/
7194         iwl4965_set_rxon_chain(priv);
7195         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7196
7197         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7198                         priv->assoc_id, priv->beacon_int);
7199
7200         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7201                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7202         else
7203                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7204
7205         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7206                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7207                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7208                 else
7209                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7210
7211                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7212                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7213
7214         }
7215
7216         iwl4965_commit_rxon(priv);
7217
7218         switch (priv->iw_mode) {
7219         case IEEE80211_IF_TYPE_STA:
7220                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
7221                 break;
7222
7223         case IEEE80211_IF_TYPE_IBSS:
7224
7225                 /* clear out the station table */
7226                 iwl4965_clear_stations_table(priv);
7227
7228                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7229                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
7230                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
7231                 iwl4965_send_beacon_cmd(priv);
7232
7233                 break;
7234
7235         default:
7236                 IWL_ERROR("%s Should not be called in %d mode\n",
7237                                 __FUNCTION__, priv->iw_mode);
7238                 break;
7239         }
7240
7241         iwl4965_sequence_reset(priv);
7242
7243 #ifdef CONFIG_IWL4965_SENSITIVITY
7244         /* Enable Rx differential gain and sensitivity calibrations */
7245         iwl4965_chain_noise_reset(priv);
7246         priv->start_calib = 1;
7247 #endif /* CONFIG_IWL4965_SENSITIVITY */
7248
7249         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7250                 priv->assoc_station_added = 1;
7251
7252 #ifdef CONFIG_IWL4965_QOS
7253         iwl4965_activate_qos(priv, 0);
7254 #endif /* CONFIG_IWL4965_QOS */
7255         /* we have just associated, don't start scan too early */
7256         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
7257         mutex_unlock(&priv->mutex);
7258 }
7259
7260 static void iwl4965_bg_abort_scan(struct work_struct *work)
7261 {
7262         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, abort_scan);
7263
7264         if (!iwl4965_is_ready(priv))
7265                 return;
7266
7267         mutex_lock(&priv->mutex);
7268
7269         set_bit(STATUS_SCAN_ABORTING, &priv->status);
7270         iwl4965_send_scan_abort(priv);
7271
7272         mutex_unlock(&priv->mutex);
7273 }
7274
7275 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
7276
7277 static void iwl4965_bg_scan_completed(struct work_struct *work)
7278 {
7279         struct iwl4965_priv *priv =
7280             container_of(work, struct iwl4965_priv, scan_completed);
7281
7282         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7283
7284         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7285                 return;
7286
7287         if (test_bit(STATUS_CONF_PENDING, &priv->status))
7288                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
7289
7290         ieee80211_scan_completed(priv->hw);
7291
7292         /* Since setting the TXPOWER may have been deferred while
7293          * performing the scan, fire one off */
7294         mutex_lock(&priv->mutex);
7295         iwl4965_hw_reg_send_txpower(priv);
7296         mutex_unlock(&priv->mutex);
7297 }
7298
7299 /*****************************************************************************
7300  *
7301  * mac80211 entry point functions
7302  *
7303  *****************************************************************************/
7304
7305 #define UCODE_READY_TIMEOUT     (2 * HZ)
7306
7307 static int iwl4965_mac_start(struct ieee80211_hw *hw)
7308 {
7309         struct iwl4965_priv *priv = hw->priv;
7310         int ret;
7311
7312         IWL_DEBUG_MAC80211("enter\n");
7313
7314         if (pci_enable_device(priv->pci_dev)) {
7315                 IWL_ERROR("Fail to pci_enable_device\n");
7316                 return -ENODEV;
7317         }
7318         pci_restore_state(priv->pci_dev);
7319         pci_enable_msi(priv->pci_dev);
7320
7321         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
7322                           DRV_NAME, priv);
7323         if (ret) {
7324                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
7325                 goto out_disable_msi;
7326         }
7327
7328         /* we should be verifying the device is ready to be opened */
7329         mutex_lock(&priv->mutex);
7330
7331         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
7332         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
7333          * ucode filename and max sizes are card-specific. */
7334
7335         if (!priv->ucode_code.len) {
7336                 ret = iwl4965_read_ucode(priv);
7337                 if (ret) {
7338                         IWL_ERROR("Could not read microcode: %d\n", ret);
7339                         mutex_unlock(&priv->mutex);
7340                         goto out_release_irq;
7341                 }
7342         }
7343
7344         ret = __iwl4965_up(priv);
7345
7346         mutex_unlock(&priv->mutex);
7347
7348         if (ret)
7349                 goto out_release_irq;
7350
7351         IWL_DEBUG_INFO("Start UP work done.\n");
7352
7353         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
7354                 return 0;
7355
7356         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
7357          * mac80211 will not be run successfully. */
7358         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
7359                         test_bit(STATUS_READY, &priv->status),
7360                         UCODE_READY_TIMEOUT);
7361         if (!ret) {
7362                 if (!test_bit(STATUS_READY, &priv->status)) {
7363                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
7364                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
7365                         ret = -ETIMEDOUT;
7366                         goto out_release_irq;
7367                 }
7368         }
7369
7370         priv->is_open = 1;
7371         IWL_DEBUG_MAC80211("leave\n");
7372         return 0;
7373
7374 out_release_irq:
7375         free_irq(priv->pci_dev->irq, priv);
7376 out_disable_msi:
7377         pci_disable_msi(priv->pci_dev);
7378         pci_disable_device(priv->pci_dev);
7379         priv->is_open = 0;
7380         IWL_DEBUG_MAC80211("leave - failed\n");
7381         return ret;
7382 }
7383
7384 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
7385 {
7386         struct iwl4965_priv *priv = hw->priv;
7387
7388         IWL_DEBUG_MAC80211("enter\n");
7389
7390         if (!priv->is_open) {
7391                 IWL_DEBUG_MAC80211("leave - skip\n");
7392                 return;
7393         }
7394
7395         priv->is_open = 0;
7396
7397         if (iwl4965_is_ready_rf(priv)) {
7398                 /* stop mac, cancel any scan request and clear
7399                  * RXON_FILTER_ASSOC_MSK BIT
7400                  */
7401                 mutex_lock(&priv->mutex);
7402                 iwl4965_scan_cancel_timeout(priv, 100);
7403                 cancel_delayed_work(&priv->post_associate);
7404                 mutex_unlock(&priv->mutex);
7405         }
7406
7407         iwl4965_down(priv);
7408
7409         flush_workqueue(priv->workqueue);
7410         free_irq(priv->pci_dev->irq, priv);
7411         pci_disable_msi(priv->pci_dev);
7412         pci_save_state(priv->pci_dev);
7413         pci_disable_device(priv->pci_dev);
7414
7415         IWL_DEBUG_MAC80211("leave\n");
7416 }
7417
7418 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7419                       struct ieee80211_tx_control *ctl)
7420 {
7421         struct iwl4965_priv *priv = hw->priv;
7422
7423         IWL_DEBUG_MAC80211("enter\n");
7424
7425         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7426                 IWL_DEBUG_MAC80211("leave - monitor\n");
7427                 return -1;
7428         }
7429
7430         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7431                      ctl->tx_rate);
7432
7433         if (iwl4965_tx_skb(priv, skb, ctl))
7434                 dev_kfree_skb_any(skb);
7435
7436         IWL_DEBUG_MAC80211("leave\n");
7437         return 0;
7438 }
7439
7440 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
7441                                  struct ieee80211_if_init_conf *conf)
7442 {
7443         struct iwl4965_priv *priv = hw->priv;
7444         unsigned long flags;
7445         DECLARE_MAC_BUF(mac);
7446
7447         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
7448
7449         if (priv->vif) {
7450                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
7451                 return -EOPNOTSUPP;
7452         }
7453
7454         spin_lock_irqsave(&priv->lock, flags);
7455         priv->vif = conf->vif;
7456
7457         spin_unlock_irqrestore(&priv->lock, flags);
7458
7459         mutex_lock(&priv->mutex);
7460
7461         if (conf->mac_addr) {
7462                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7463                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7464         }
7465
7466         if (iwl4965_is_ready(priv))
7467                 iwl4965_set_mode(priv, conf->type);
7468
7469         mutex_unlock(&priv->mutex);
7470
7471         IWL_DEBUG_MAC80211("leave\n");
7472         return 0;
7473 }
7474
7475 /**
7476  * iwl4965_mac_config - mac80211 config callback
7477  *
7478  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7479  * be set inappropriately and the driver currently sets the hardware up to
7480  * use it whenever needed.
7481  */
7482 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7483 {
7484         struct iwl4965_priv *priv = hw->priv;
7485         const struct iwl4965_channel_info *ch_info;
7486         unsigned long flags;
7487         int ret = 0;
7488
7489         mutex_lock(&priv->mutex);
7490         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7491
7492         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7493
7494         if (!iwl4965_is_ready(priv)) {
7495                 IWL_DEBUG_MAC80211("leave - not ready\n");
7496                 ret = -EIO;
7497                 goto out;
7498         }
7499
7500         if (unlikely(!iwl4965_param_disable_hw_scan &&
7501                      test_bit(STATUS_SCANNING, &priv->status))) {
7502                 IWL_DEBUG_MAC80211("leave - scanning\n");
7503                 set_bit(STATUS_CONF_PENDING, &priv->status);
7504                 mutex_unlock(&priv->mutex);
7505                 return 0;
7506         }
7507
7508         spin_lock_irqsave(&priv->lock, flags);
7509
7510         ch_info = iwl4965_get_channel_info(priv, conf->phymode, conf->channel);
7511         if (!is_channel_valid(ch_info)) {
7512                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7513                                conf->channel, conf->phymode);
7514                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7515                 spin_unlock_irqrestore(&priv->lock, flags);
7516                 ret = -EINVAL;
7517                 goto out;
7518         }
7519
7520 #ifdef CONFIG_IWL4965_HT
7521         /* if we are switching fron ht to 2.4 clear flags
7522          * from any ht related info since 2.4 does not
7523          * support ht */
7524         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7525 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7526             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7527 #endif
7528         )
7529                 priv->staging_rxon.flags = 0;
7530 #endif /* CONFIG_IWL4965_HT */
7531
7532         iwl4965_set_rxon_channel(priv, conf->phymode, conf->channel);
7533
7534         iwl4965_set_flags_for_phymode(priv, conf->phymode);
7535
7536         /* The list of supported rates and rate mask can be different
7537          * for each phymode; since the phymode may have changed, reset
7538          * the rate mask to what mac80211 lists */
7539         iwl4965_set_rate(priv);
7540
7541         spin_unlock_irqrestore(&priv->lock, flags);
7542
7543 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7544         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7545                 iwl4965_hw_channel_switch(priv, conf->channel);
7546                 goto out;
7547         }
7548 #endif
7549
7550         iwl4965_radio_kill_sw(priv, !conf->radio_enabled);
7551
7552         if (!conf->radio_enabled) {
7553                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7554                 goto out;
7555         }
7556
7557         if (iwl4965_is_rfkill(priv)) {
7558                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7559                 ret = -EIO;
7560                 goto out;
7561         }
7562
7563         iwl4965_set_rate(priv);
7564
7565         if (memcmp(&priv->active_rxon,
7566                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7567                 iwl4965_commit_rxon(priv);
7568         else
7569                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7570
7571         IWL_DEBUG_MAC80211("leave\n");
7572
7573 out:
7574         clear_bit(STATUS_CONF_PENDING, &priv->status);
7575         mutex_unlock(&priv->mutex);
7576         return ret;
7577 }
7578
7579 static void iwl4965_config_ap(struct iwl4965_priv *priv)
7580 {
7581         int rc = 0;
7582
7583         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7584                 return;
7585
7586         /* The following should be done only at AP bring up */
7587         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7588
7589                 /* RXON - unassoc (to set timing command) */
7590                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7591                 iwl4965_commit_rxon(priv);
7592
7593                 /* RXON Timing */
7594                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7595                 iwl4965_setup_rxon_timing(priv);
7596                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7597                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7598                 if (rc)
7599                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7600                                         "Attempting to continue.\n");
7601
7602                 iwl4965_set_rxon_chain(priv);
7603
7604                 /* FIXME: what should be the assoc_id for AP? */
7605                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7606                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7607                         priv->staging_rxon.flags |=
7608                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7609                 else
7610                         priv->staging_rxon.flags &=
7611                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7612
7613                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7614                         if (priv->assoc_capability &
7615                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7616                                 priv->staging_rxon.flags |=
7617                                         RXON_FLG_SHORT_SLOT_MSK;
7618                         else
7619                                 priv->staging_rxon.flags &=
7620                                         ~RXON_FLG_SHORT_SLOT_MSK;
7621
7622                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7623                                 priv->staging_rxon.flags &=
7624                                         ~RXON_FLG_SHORT_SLOT_MSK;
7625                 }
7626                 /* restore RXON assoc */
7627                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7628                 iwl4965_commit_rxon(priv);
7629 #ifdef CONFIG_IWL4965_QOS
7630                 iwl4965_activate_qos(priv, 1);
7631 #endif
7632                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7633         }
7634         iwl4965_send_beacon_cmd(priv);
7635
7636         /* FIXME - we need to add code here to detect a totally new
7637          * configuration, reset the AP, unassoc, rxon timing, assoc,
7638          * clear sta table, add BCAST sta... */
7639 }
7640
7641 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
7642                                         struct ieee80211_vif *vif,
7643                                     struct ieee80211_if_conf *conf)
7644 {
7645         struct iwl4965_priv *priv = hw->priv;
7646         DECLARE_MAC_BUF(mac);
7647         unsigned long flags;
7648         int rc;
7649
7650         if (conf == NULL)
7651                 return -EIO;
7652
7653         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7654             (!conf->beacon || !conf->ssid_len)) {
7655                 IWL_DEBUG_MAC80211
7656                     ("Leaving in AP mode because HostAPD is not ready.\n");
7657                 return 0;
7658         }
7659
7660         if (!iwl4965_is_alive(priv))
7661                 return -EAGAIN;
7662
7663         mutex_lock(&priv->mutex);
7664
7665         if (conf->bssid)
7666                 IWL_DEBUG_MAC80211("bssid: %s\n",
7667                                    print_mac(mac, conf->bssid));
7668
7669 /*
7670  * very dubious code was here; the probe filtering flag is never set:
7671  *
7672         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7673             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7674  */
7675         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7676                 IWL_DEBUG_MAC80211("leave - scanning\n");
7677                 mutex_unlock(&priv->mutex);
7678                 return 0;
7679         }
7680
7681         if (priv->vif != vif) {
7682                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7683                 mutex_unlock(&priv->mutex);
7684                 return 0;
7685         }
7686
7687         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7688                 if (!conf->bssid) {
7689                         conf->bssid = priv->mac_addr;
7690                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7691                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7692                                            print_mac(mac, conf->bssid));
7693                 }
7694                 if (priv->ibss_beacon)
7695                         dev_kfree_skb(priv->ibss_beacon);
7696
7697                 priv->ibss_beacon = conf->beacon;
7698         }
7699
7700         if (iwl4965_is_rfkill(priv))
7701                 goto done;
7702
7703         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7704             !is_multicast_ether_addr(conf->bssid)) {
7705                 /* If there is currently a HW scan going on in the background
7706                  * then we need to cancel it else the RXON below will fail. */
7707                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
7708                         IWL_WARNING("Aborted scan still in progress "
7709                                     "after 100ms\n");
7710                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7711                         mutex_unlock(&priv->mutex);
7712                         return -EAGAIN;
7713                 }
7714                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7715
7716                 /* TODO: Audit driver for usage of these members and see
7717                  * if mac80211 deprecates them (priv->bssid looks like it
7718                  * shouldn't be there, but I haven't scanned the IBSS code
7719                  * to verify) - jpk */
7720                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7721
7722                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7723                         iwl4965_config_ap(priv);
7724                 else {
7725                         rc = iwl4965_commit_rxon(priv);
7726                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7727                                 iwl4965_rxon_add_station(
7728                                         priv, priv->active_rxon.bssid_addr, 1);
7729                 }
7730
7731         } else {
7732                 iwl4965_scan_cancel_timeout(priv, 100);
7733                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7734                 iwl4965_commit_rxon(priv);
7735         }
7736
7737  done:
7738         spin_lock_irqsave(&priv->lock, flags);
7739         if (!conf->ssid_len)
7740                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7741         else
7742                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7743
7744         priv->essid_len = conf->ssid_len;
7745         spin_unlock_irqrestore(&priv->lock, flags);
7746
7747         IWL_DEBUG_MAC80211("leave\n");
7748         mutex_unlock(&priv->mutex);
7749
7750         return 0;
7751 }
7752
7753 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
7754                                  unsigned int changed_flags,
7755                                  unsigned int *total_flags,
7756                                  int mc_count, struct dev_addr_list *mc_list)
7757 {
7758         /*
7759          * XXX: dummy
7760          * see also iwl4965_connection_init_rx_config
7761          */
7762         *total_flags = 0;
7763 }
7764
7765 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
7766                                      struct ieee80211_if_init_conf *conf)
7767 {
7768         struct iwl4965_priv *priv = hw->priv;
7769
7770         IWL_DEBUG_MAC80211("enter\n");
7771
7772         mutex_lock(&priv->mutex);
7773
7774         if (iwl4965_is_ready_rf(priv)) {
7775                 iwl4965_scan_cancel_timeout(priv, 100);
7776                 cancel_delayed_work(&priv->post_associate);
7777                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7778                 iwl4965_commit_rxon(priv);
7779         }
7780         if (priv->vif == conf->vif) {
7781                 priv->vif = NULL;
7782                 memset(priv->bssid, 0, ETH_ALEN);
7783                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7784                 priv->essid_len = 0;
7785         }
7786         mutex_unlock(&priv->mutex);
7787
7788         IWL_DEBUG_MAC80211("leave\n");
7789
7790 }
7791
7792 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
7793                                      struct ieee80211_vif *vif,
7794                                      struct ieee80211_bss_conf *bss_conf,
7795                                      u32 changes)
7796 {
7797         struct iwl4965_priv *priv = hw->priv;
7798
7799         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
7800                 if (bss_conf->use_short_preamble)
7801                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7802                 else
7803                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7804         }
7805
7806         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
7807                 if (bss_conf->use_cts_prot && (priv->phymode != MODE_IEEE80211A))
7808                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7809                 else
7810                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7811         }
7812
7813         if (changes & BSS_CHANGED_ASSOC) {
7814                 /*
7815                  * TODO:
7816                  * do stuff instead of sniffing assoc resp
7817                  */
7818         }
7819
7820         if (iwl4965_is_associated(priv))
7821                 iwl4965_send_rxon_assoc(priv);
7822 }
7823
7824 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7825 {
7826         int rc = 0;
7827         unsigned long flags;
7828         struct iwl4965_priv *priv = hw->priv;
7829
7830         IWL_DEBUG_MAC80211("enter\n");
7831
7832         mutex_lock(&priv->mutex);
7833         spin_lock_irqsave(&priv->lock, flags);
7834
7835         if (!iwl4965_is_ready_rf(priv)) {
7836                 rc = -EIO;
7837                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7838                 goto out_unlock;
7839         }
7840
7841         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7842                 rc = -EIO;
7843                 IWL_ERROR("ERROR: APs don't scan\n");
7844                 goto out_unlock;
7845         }
7846
7847         /* we don't schedule scan within next_scan_jiffies period */
7848         if (priv->next_scan_jiffies &&
7849                         time_after(priv->next_scan_jiffies, jiffies)) {
7850                 rc = -EAGAIN;
7851                 goto out_unlock;
7852         }
7853         /* if we just finished scan ask for delay */
7854         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7855                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7856                 rc = -EAGAIN;
7857                 goto out_unlock;
7858         }
7859         if (len) {
7860                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7861                                iwl4965_escape_essid(ssid, len), (int)len);
7862
7863                 priv->one_direct_scan = 1;
7864                 priv->direct_ssid_len = (u8)
7865                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7866                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7867         } else
7868                 priv->one_direct_scan = 0;
7869
7870         rc = iwl4965_scan_initiate(priv);
7871
7872         IWL_DEBUG_MAC80211("leave\n");
7873
7874 out_unlock:
7875         spin_unlock_irqrestore(&priv->lock, flags);
7876         mutex_unlock(&priv->mutex);
7877
7878         return rc;
7879 }
7880
7881 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7882                            const u8 *local_addr, const u8 *addr,
7883                            struct ieee80211_key_conf *key)
7884 {
7885         struct iwl4965_priv *priv = hw->priv;
7886         DECLARE_MAC_BUF(mac);
7887         int rc = 0;
7888         u8 sta_id;
7889
7890         IWL_DEBUG_MAC80211("enter\n");
7891
7892         if (!iwl4965_param_hwcrypto) {
7893                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7894                 return -EOPNOTSUPP;
7895         }
7896
7897         if (is_zero_ether_addr(addr))
7898                 /* only support pairwise keys */
7899                 return -EOPNOTSUPP;
7900
7901         sta_id = iwl4965_hw_find_station(priv, addr);
7902         if (sta_id == IWL_INVALID_STATION) {
7903                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7904                                    print_mac(mac, addr));
7905                 return -EINVAL;
7906         }
7907
7908         mutex_lock(&priv->mutex);
7909
7910         iwl4965_scan_cancel_timeout(priv, 100);
7911
7912         switch (cmd) {
7913         case  SET_KEY:
7914                 rc = iwl4965_update_sta_key_info(priv, key, sta_id);
7915                 if (!rc) {
7916                         iwl4965_set_rxon_hwcrypto(priv, 1);
7917                         iwl4965_commit_rxon(priv);
7918                         key->hw_key_idx = sta_id;
7919                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7920                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7921                 }
7922                 break;
7923         case DISABLE_KEY:
7924                 rc = iwl4965_clear_sta_key_info(priv, sta_id);
7925                 if (!rc) {
7926                         iwl4965_set_rxon_hwcrypto(priv, 0);
7927                         iwl4965_commit_rxon(priv);
7928                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7929                 }
7930                 break;
7931         default:
7932                 rc = -EINVAL;
7933         }
7934
7935         IWL_DEBUG_MAC80211("leave\n");
7936         mutex_unlock(&priv->mutex);
7937
7938         return rc;
7939 }
7940
7941 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7942                            const struct ieee80211_tx_queue_params *params)
7943 {
7944         struct iwl4965_priv *priv = hw->priv;
7945 #ifdef CONFIG_IWL4965_QOS
7946         unsigned long flags;
7947         int q;
7948 #endif /* CONFIG_IWL4965_QOS */
7949
7950         IWL_DEBUG_MAC80211("enter\n");
7951
7952         if (!iwl4965_is_ready_rf(priv)) {
7953                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7954                 return -EIO;
7955         }
7956
7957         if (queue >= AC_NUM) {
7958                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7959                 return 0;
7960         }
7961
7962 #ifdef CONFIG_IWL4965_QOS
7963         if (!priv->qos_data.qos_enable) {
7964                 priv->qos_data.qos_active = 0;
7965                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7966                 return 0;
7967         }
7968         q = AC_NUM - 1 - queue;
7969
7970         spin_lock_irqsave(&priv->lock, flags);
7971
7972         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7973         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7974         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7975         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7976                         cpu_to_le16((params->burst_time * 100));
7977
7978         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7979         priv->qos_data.qos_active = 1;
7980
7981         spin_unlock_irqrestore(&priv->lock, flags);
7982
7983         mutex_lock(&priv->mutex);
7984         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7985                 iwl4965_activate_qos(priv, 1);
7986         else if (priv->assoc_id && iwl4965_is_associated(priv))
7987                 iwl4965_activate_qos(priv, 0);
7988
7989         mutex_unlock(&priv->mutex);
7990
7991 #endif /*CONFIG_IWL4965_QOS */
7992
7993         IWL_DEBUG_MAC80211("leave\n");
7994         return 0;
7995 }
7996
7997 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
7998                                 struct ieee80211_tx_queue_stats *stats)
7999 {
8000         struct iwl4965_priv *priv = hw->priv;
8001         int i, avail;
8002         struct iwl4965_tx_queue *txq;
8003         struct iwl4965_queue *q;
8004         unsigned long flags;
8005
8006         IWL_DEBUG_MAC80211("enter\n");
8007
8008         if (!iwl4965_is_ready_rf(priv)) {
8009                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8010                 return -EIO;
8011         }
8012
8013         spin_lock_irqsave(&priv->lock, flags);
8014
8015         for (i = 0; i < AC_NUM; i++) {
8016                 txq = &priv->txq[i];
8017                 q = &txq->q;
8018                 avail = iwl4965_queue_space(q);
8019
8020                 stats->data[i].len = q->n_window - avail;
8021                 stats->data[i].limit = q->n_window - q->high_mark;
8022                 stats->data[i].count = q->n_window;
8023
8024         }
8025         spin_unlock_irqrestore(&priv->lock, flags);
8026
8027         IWL_DEBUG_MAC80211("leave\n");
8028
8029         return 0;
8030 }
8031
8032 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
8033                              struct ieee80211_low_level_stats *stats)
8034 {
8035         IWL_DEBUG_MAC80211("enter\n");
8036         IWL_DEBUG_MAC80211("leave\n");
8037
8038         return 0;
8039 }
8040
8041 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
8042 {
8043         IWL_DEBUG_MAC80211("enter\n");
8044         IWL_DEBUG_MAC80211("leave\n");
8045
8046         return 0;
8047 }
8048
8049 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
8050 {
8051         struct iwl4965_priv *priv = hw->priv;
8052         unsigned long flags;
8053
8054         mutex_lock(&priv->mutex);
8055         IWL_DEBUG_MAC80211("enter\n");
8056
8057         priv->lq_mngr.lq_ready = 0;
8058 #ifdef CONFIG_IWL4965_HT
8059         spin_lock_irqsave(&priv->lock, flags);
8060         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
8061         spin_unlock_irqrestore(&priv->lock, flags);
8062 #ifdef CONFIG_IWL4965_HT_AGG
8063 /*      if (priv->lq_mngr.agg_ctrl.granted_ba)
8064                 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
8065
8066         memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl4965_agg_control));
8067         priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
8068         priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
8069         priv->lq_mngr.agg_ctrl.auto_agg = 1;
8070
8071         if (priv->lq_mngr.agg_ctrl.auto_agg)
8072                 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
8073 #endif /*CONFIG_IWL4965_HT_AGG */
8074 #endif /* CONFIG_IWL4965_HT */
8075
8076 #ifdef CONFIG_IWL4965_QOS
8077         iwl4965_reset_qos(priv);
8078 #endif
8079
8080         cancel_delayed_work(&priv->post_associate);
8081
8082         spin_lock_irqsave(&priv->lock, flags);
8083         priv->assoc_id = 0;
8084         priv->assoc_capability = 0;
8085         priv->call_post_assoc_from_beacon = 0;
8086         priv->assoc_station_added = 0;
8087
8088         /* new association get rid of ibss beacon skb */
8089         if (priv->ibss_beacon)
8090                 dev_kfree_skb(priv->ibss_beacon);
8091
8092         priv->ibss_beacon = NULL;
8093
8094         priv->beacon_int = priv->hw->conf.beacon_int;
8095         priv->timestamp1 = 0;
8096         priv->timestamp0 = 0;
8097         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
8098                 priv->beacon_int = 0;
8099
8100         spin_unlock_irqrestore(&priv->lock, flags);
8101
8102         if (!iwl4965_is_ready_rf(priv)) {
8103                 IWL_DEBUG_MAC80211("leave - not ready\n");
8104                 mutex_unlock(&priv->mutex);
8105                 return;
8106         }
8107
8108         /* we are restarting association process
8109          * clear RXON_FILTER_ASSOC_MSK bit
8110          */
8111         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
8112                 iwl4965_scan_cancel_timeout(priv, 100);
8113                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
8114                 iwl4965_commit_rxon(priv);
8115         }
8116
8117         /* Per mac80211.h: This is only used in IBSS mode... */
8118         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8119
8120                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
8121                 mutex_unlock(&priv->mutex);
8122                 return;
8123         }
8124
8125         priv->only_active_channel = 0;
8126
8127         iwl4965_set_rate(priv);
8128
8129         mutex_unlock(&priv->mutex);
8130
8131         IWL_DEBUG_MAC80211("leave\n");
8132 }
8133
8134 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
8135                                  struct ieee80211_tx_control *control)
8136 {
8137         struct iwl4965_priv *priv = hw->priv;
8138         unsigned long flags;
8139
8140         mutex_lock(&priv->mutex);
8141         IWL_DEBUG_MAC80211("enter\n");
8142
8143         if (!iwl4965_is_ready_rf(priv)) {
8144                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8145                 mutex_unlock(&priv->mutex);
8146                 return -EIO;
8147         }
8148
8149         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8150                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
8151                 mutex_unlock(&priv->mutex);
8152                 return -EIO;
8153         }
8154
8155         spin_lock_irqsave(&priv->lock, flags);
8156
8157         if (priv->ibss_beacon)
8158                 dev_kfree_skb(priv->ibss_beacon);
8159
8160         priv->ibss_beacon = skb;
8161
8162         priv->assoc_id = 0;
8163
8164         IWL_DEBUG_MAC80211("leave\n");
8165         spin_unlock_irqrestore(&priv->lock, flags);
8166
8167 #ifdef CONFIG_IWL4965_QOS
8168         iwl4965_reset_qos(priv);
8169 #endif
8170
8171         queue_work(priv->workqueue, &priv->post_associate.work);
8172
8173         mutex_unlock(&priv->mutex);
8174
8175         return 0;
8176 }
8177
8178 #ifdef CONFIG_IWL4965_HT
8179
8180 static void iwl4965_ht_info_fill(struct ieee80211_conf *conf,
8181                                  struct iwl4965_priv *priv)
8182 {
8183         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
8184         struct ieee80211_ht_info *ht_conf = &conf->ht_conf;
8185         struct ieee80211_ht_bss_info *ht_bss_conf = &conf->ht_bss_conf;
8186
8187         IWL_DEBUG_MAC80211("enter: \n");
8188
8189         if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) {
8190                 iwl_conf->is_ht = 0;
8191                 return;
8192         }
8193
8194         iwl_conf->is_ht = 1;
8195         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
8196
8197         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
8198                 iwl_conf->sgf |= 0x1;
8199         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
8200                 iwl_conf->sgf |= 0x2;
8201
8202         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
8203         iwl_conf->max_amsdu_size =
8204                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
8205         iwl_conf->supported_chan_width =
8206                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
8207         iwl_conf->tx_mimo_ps_mode =
8208                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
8209         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
8210
8211         iwl_conf->control_channel = ht_bss_conf->primary_channel;
8212         iwl_conf->extension_chan_offset =
8213                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
8214         iwl_conf->tx_chan_width =
8215                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
8216         iwl_conf->ht_protection =
8217                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
8218         iwl_conf->non_GF_STA_present =
8219                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
8220
8221         IWL_DEBUG_MAC80211("control channel %d\n",
8222                 iwl_conf->control_channel);
8223         IWL_DEBUG_MAC80211("leave\n");
8224 }
8225
8226 static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
8227                                struct ieee80211_conf *conf)
8228 {
8229         struct iwl4965_priv *priv = hw->priv;
8230
8231         IWL_DEBUG_MAC80211("enter: \n");
8232
8233         iwl4965_ht_info_fill(conf, priv);
8234         iwl4965_set_rxon_chain(priv);
8235
8236         if (priv && priv->assoc_id &&
8237             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8238                 unsigned long flags;
8239
8240                 spin_lock_irqsave(&priv->lock, flags);
8241                 if (priv->beacon_int)
8242                         queue_work(priv->workqueue, &priv->post_associate.work);
8243                 else
8244                         priv->call_post_assoc_from_beacon = 1;
8245                 spin_unlock_irqrestore(&priv->lock, flags);
8246         }
8247
8248         IWL_DEBUG_MAC80211("leave:\n");
8249         return 0;
8250 }
8251
8252 static void iwl4965_set_ht_capab(struct ieee80211_hw *hw,
8253                         struct ieee80211_ht_cap *ht_cap,
8254                         u8 use_current_config)
8255 {
8256         struct ieee80211_conf *conf = &hw->conf;
8257         struct ieee80211_hw_mode *mode = conf->mode;
8258
8259         if (use_current_config) {
8260                 ht_cap->cap_info = cpu_to_le16(conf->ht_conf.cap);
8261                 memcpy(ht_cap->supp_mcs_set,
8262                                 conf->ht_conf.supp_mcs_set, 16);
8263         } else {
8264                 ht_cap->cap_info = cpu_to_le16(mode->ht_info.cap);
8265                 memcpy(ht_cap->supp_mcs_set,
8266                                 mode->ht_info.supp_mcs_set, 16);
8267         }
8268         ht_cap->ampdu_params_info =
8269                 (mode->ht_info.ampdu_factor & IEEE80211_HT_CAP_AMPDU_FACTOR) |
8270                 ((mode->ht_info.ampdu_density << 2) &
8271                                         IEEE80211_HT_CAP_AMPDU_DENSITY);
8272 }
8273
8274 #endif /*CONFIG_IWL4965_HT*/
8275
8276 /*****************************************************************************
8277  *
8278  * sysfs attributes
8279  *
8280  *****************************************************************************/
8281
8282 #ifdef CONFIG_IWL4965_DEBUG
8283
8284 /*
8285  * The following adds a new attribute to the sysfs representation
8286  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8287  * used for controlling the debug level.
8288  *
8289  * See the level definitions in iwl for details.
8290  */
8291
8292 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8293 {
8294         return sprintf(buf, "0x%08X\n", iwl4965_debug_level);
8295 }
8296 static ssize_t store_debug_level(struct device_driver *d,
8297                                  const char *buf, size_t count)
8298 {
8299         char *p = (char *)buf;
8300         u32 val;
8301
8302         val = simple_strtoul(p, &p, 0);
8303         if (p == buf)
8304                 printk(KERN_INFO DRV_NAME
8305                        ": %s is not in hex or decimal form.\n", buf);
8306         else
8307                 iwl4965_debug_level = val;
8308
8309         return strnlen(buf, count);
8310 }
8311
8312 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8313                    show_debug_level, store_debug_level);
8314
8315 #endif /* CONFIG_IWL4965_DEBUG */
8316
8317 static ssize_t show_rf_kill(struct device *d,
8318                             struct device_attribute *attr, char *buf)
8319 {
8320         /*
8321          * 0 - RF kill not enabled
8322          * 1 - SW based RF kill active (sysfs)
8323          * 2 - HW based RF kill active
8324          * 3 - Both HW and SW based RF kill active
8325          */
8326         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8327         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8328                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8329
8330         return sprintf(buf, "%i\n", val);
8331 }
8332
8333 static ssize_t store_rf_kill(struct device *d,
8334                              struct device_attribute *attr,
8335                              const char *buf, size_t count)
8336 {
8337         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8338
8339         mutex_lock(&priv->mutex);
8340         iwl4965_radio_kill_sw(priv, buf[0] == '1');
8341         mutex_unlock(&priv->mutex);
8342
8343         return count;
8344 }
8345
8346 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8347
8348 static ssize_t show_temperature(struct device *d,
8349                                 struct device_attribute *attr, char *buf)
8350 {
8351         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8352
8353         if (!iwl4965_is_alive(priv))
8354                 return -EAGAIN;
8355
8356         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
8357 }
8358
8359 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8360
8361 static ssize_t show_rs_window(struct device *d,
8362                               struct device_attribute *attr,
8363                               char *buf)
8364 {
8365         struct iwl4965_priv *priv = d->driver_data;
8366         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8367 }
8368 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8369
8370 static ssize_t show_tx_power(struct device *d,
8371                              struct device_attribute *attr, char *buf)
8372 {
8373         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8374         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8375 }
8376
8377 static ssize_t store_tx_power(struct device *d,
8378                               struct device_attribute *attr,
8379                               const char *buf, size_t count)
8380 {
8381         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8382         char *p = (char *)buf;
8383         u32 val;
8384
8385         val = simple_strtoul(p, &p, 10);
8386         if (p == buf)
8387                 printk(KERN_INFO DRV_NAME
8388                        ": %s is not in decimal form.\n", buf);
8389         else
8390                 iwl4965_hw_reg_set_txpower(priv, val);
8391
8392         return count;
8393 }
8394
8395 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8396
8397 static ssize_t show_flags(struct device *d,
8398                           struct device_attribute *attr, char *buf)
8399 {
8400         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8401
8402         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8403 }
8404
8405 static ssize_t store_flags(struct device *d,
8406                            struct device_attribute *attr,
8407                            const char *buf, size_t count)
8408 {
8409         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8410         u32 flags = simple_strtoul(buf, NULL, 0);
8411
8412         mutex_lock(&priv->mutex);
8413         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8414                 /* Cancel any currently running scans... */
8415                 if (iwl4965_scan_cancel_timeout(priv, 100))
8416                         IWL_WARNING("Could not cancel scan.\n");
8417                 else {
8418                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8419                                        flags);
8420                         priv->staging_rxon.flags = cpu_to_le32(flags);
8421                         iwl4965_commit_rxon(priv);
8422                 }
8423         }
8424         mutex_unlock(&priv->mutex);
8425
8426         return count;
8427 }
8428
8429 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8430
8431 static ssize_t show_filter_flags(struct device *d,
8432                                  struct device_attribute *attr, char *buf)
8433 {
8434         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8435
8436         return sprintf(buf, "0x%04X\n",
8437                 le32_to_cpu(priv->active_rxon.filter_flags));
8438 }
8439
8440 static ssize_t store_filter_flags(struct device *d,
8441                                   struct device_attribute *attr,
8442                                   const char *buf, size_t count)
8443 {
8444         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8445         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8446
8447         mutex_lock(&priv->mutex);
8448         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8449                 /* Cancel any currently running scans... */
8450                 if (iwl4965_scan_cancel_timeout(priv, 100))
8451                         IWL_WARNING("Could not cancel scan.\n");
8452                 else {
8453                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8454                                        "0x%04X\n", filter_flags);
8455                         priv->staging_rxon.filter_flags =
8456                                 cpu_to_le32(filter_flags);
8457                         iwl4965_commit_rxon(priv);
8458                 }
8459         }
8460         mutex_unlock(&priv->mutex);
8461
8462         return count;
8463 }
8464
8465 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8466                    store_filter_flags);
8467
8468 static ssize_t show_tune(struct device *d,
8469                          struct device_attribute *attr, char *buf)
8470 {
8471         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8472
8473         return sprintf(buf, "0x%04X\n",
8474                        (priv->phymode << 8) |
8475                         le16_to_cpu(priv->active_rxon.channel));
8476 }
8477
8478 static void iwl4965_set_flags_for_phymode(struct iwl4965_priv *priv, u8 phymode);
8479
8480 static ssize_t store_tune(struct device *d,
8481                           struct device_attribute *attr,
8482                           const char *buf, size_t count)
8483 {
8484         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8485         char *p = (char *)buf;
8486         u16 tune = simple_strtoul(p, &p, 0);
8487         u8 phymode = (tune >> 8) & 0xff;
8488         u16 channel = tune & 0xff;
8489
8490         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8491
8492         mutex_lock(&priv->mutex);
8493         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8494             (priv->phymode != phymode)) {
8495                 const struct iwl4965_channel_info *ch_info;
8496
8497                 ch_info = iwl4965_get_channel_info(priv, phymode, channel);
8498                 if (!ch_info) {
8499                         IWL_WARNING("Requested invalid phymode/channel "
8500                                     "combination: %d %d\n", phymode, channel);
8501                         mutex_unlock(&priv->mutex);
8502                         return -EINVAL;
8503                 }
8504
8505                 /* Cancel any currently running scans... */
8506                 if (iwl4965_scan_cancel_timeout(priv, 100))
8507                         IWL_WARNING("Could not cancel scan.\n");
8508                 else {
8509                         IWL_DEBUG_INFO("Committing phymode and "
8510                                        "rxon.channel = %d %d\n",
8511                                        phymode, channel);
8512
8513                         iwl4965_set_rxon_channel(priv, phymode, channel);
8514                         iwl4965_set_flags_for_phymode(priv, phymode);
8515
8516                         iwl4965_set_rate(priv);
8517                         iwl4965_commit_rxon(priv);
8518                 }
8519         }
8520         mutex_unlock(&priv->mutex);
8521
8522         return count;
8523 }
8524
8525 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8526
8527 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8528
8529 static ssize_t show_measurement(struct device *d,
8530                                 struct device_attribute *attr, char *buf)
8531 {
8532         struct iwl4965_priv *priv = dev_get_drvdata(d);
8533         struct iwl4965_spectrum_notification measure_report;
8534         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8535         u8 *data = (u8 *) & measure_report;
8536         unsigned long flags;
8537
8538         spin_lock_irqsave(&priv->lock, flags);
8539         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8540                 spin_unlock_irqrestore(&priv->lock, flags);
8541                 return 0;
8542         }
8543         memcpy(&measure_report, &priv->measure_report, size);
8544         priv->measurement_status = 0;
8545         spin_unlock_irqrestore(&priv->lock, flags);
8546
8547         while (size && (PAGE_SIZE - len)) {
8548                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8549                                    PAGE_SIZE - len, 1);
8550                 len = strlen(buf);
8551                 if (PAGE_SIZE - len)
8552                         buf[len++] = '\n';
8553
8554                 ofs += 16;
8555                 size -= min(size, 16U);
8556         }
8557
8558         return len;
8559 }
8560
8561 static ssize_t store_measurement(struct device *d,
8562                                  struct device_attribute *attr,
8563                                  const char *buf, size_t count)
8564 {
8565         struct iwl4965_priv *priv = dev_get_drvdata(d);
8566         struct ieee80211_measurement_params params = {
8567                 .channel = le16_to_cpu(priv->active_rxon.channel),
8568                 .start_time = cpu_to_le64(priv->last_tsf),
8569                 .duration = cpu_to_le16(1),
8570         };
8571         u8 type = IWL_MEASURE_BASIC;
8572         u8 buffer[32];
8573         u8 channel;
8574
8575         if (count) {
8576                 char *p = buffer;
8577                 strncpy(buffer, buf, min(sizeof(buffer), count));
8578                 channel = simple_strtoul(p, NULL, 0);
8579                 if (channel)
8580                         params.channel = channel;
8581
8582                 p = buffer;
8583                 while (*p && *p != ' ')
8584                         p++;
8585                 if (*p)
8586                         type = simple_strtoul(p + 1, NULL, 0);
8587         }
8588
8589         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8590                        "channel %d (for '%s')\n", type, params.channel, buf);
8591         iwl4965_get_measurement(priv, &params, type);
8592
8593         return count;
8594 }
8595
8596 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8597                    show_measurement, store_measurement);
8598 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
8599
8600 static ssize_t store_retry_rate(struct device *d,
8601                                 struct device_attribute *attr,
8602                                 const char *buf, size_t count)
8603 {
8604         struct iwl4965_priv *priv = dev_get_drvdata(d);
8605
8606         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8607         if (priv->retry_rate <= 0)
8608                 priv->retry_rate = 1;
8609
8610         return count;
8611 }
8612
8613 static ssize_t show_retry_rate(struct device *d,
8614                                struct device_attribute *attr, char *buf)
8615 {
8616         struct iwl4965_priv *priv = dev_get_drvdata(d);
8617         return sprintf(buf, "%d", priv->retry_rate);
8618 }
8619
8620 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8621                    store_retry_rate);
8622
8623 static ssize_t store_power_level(struct device *d,
8624                                  struct device_attribute *attr,
8625                                  const char *buf, size_t count)
8626 {
8627         struct iwl4965_priv *priv = dev_get_drvdata(d);
8628         int rc;
8629         int mode;
8630
8631         mode = simple_strtoul(buf, NULL, 0);
8632         mutex_lock(&priv->mutex);
8633
8634         if (!iwl4965_is_ready(priv)) {
8635                 rc = -EAGAIN;
8636                 goto out;
8637         }
8638
8639         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8640                 mode = IWL_POWER_AC;
8641         else
8642                 mode |= IWL_POWER_ENABLED;
8643
8644         if (mode != priv->power_mode) {
8645                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8646                 if (rc) {
8647                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8648                         goto out;
8649                 }
8650                 priv->power_mode = mode;
8651         }
8652
8653         rc = count;
8654
8655  out:
8656         mutex_unlock(&priv->mutex);
8657         return rc;
8658 }
8659
8660 #define MAX_WX_STRING 80
8661
8662 /* Values are in microsecond */
8663 static const s32 timeout_duration[] = {
8664         350000,
8665         250000,
8666         75000,
8667         37000,
8668         25000,
8669 };
8670 static const s32 period_duration[] = {
8671         400000,
8672         700000,
8673         1000000,
8674         1000000,
8675         1000000
8676 };
8677
8678 static ssize_t show_power_level(struct device *d,
8679                                 struct device_attribute *attr, char *buf)
8680 {
8681         struct iwl4965_priv *priv = dev_get_drvdata(d);
8682         int level = IWL_POWER_LEVEL(priv->power_mode);
8683         char *p = buf;
8684
8685         p += sprintf(p, "%d ", level);
8686         switch (level) {
8687         case IWL_POWER_MODE_CAM:
8688         case IWL_POWER_AC:
8689                 p += sprintf(p, "(AC)");
8690                 break;
8691         case IWL_POWER_BATTERY:
8692                 p += sprintf(p, "(BATTERY)");
8693                 break;
8694         default:
8695                 p += sprintf(p,
8696                              "(Timeout %dms, Period %dms)",
8697                              timeout_duration[level - 1] / 1000,
8698                              period_duration[level - 1] / 1000);
8699         }
8700
8701         if (!(priv->power_mode & IWL_POWER_ENABLED))
8702                 p += sprintf(p, " OFF\n");
8703         else
8704                 p += sprintf(p, " \n");
8705
8706         return (p - buf + 1);
8707
8708 }
8709
8710 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8711                    store_power_level);
8712
8713 static ssize_t show_channels(struct device *d,
8714                              struct device_attribute *attr, char *buf)
8715 {
8716         struct iwl4965_priv *priv = dev_get_drvdata(d);
8717         int len = 0, i;
8718         struct ieee80211_channel *channels = NULL;
8719         const struct ieee80211_hw_mode *hw_mode = NULL;
8720         int count = 0;
8721
8722         if (!iwl4965_is_ready(priv))
8723                 return -EAGAIN;
8724
8725         hw_mode = iwl4965_get_hw_mode(priv, MODE_IEEE80211G);
8726         if (!hw_mode)
8727                 hw_mode = iwl4965_get_hw_mode(priv, MODE_IEEE80211B);
8728         if (hw_mode) {
8729                 channels = hw_mode->channels;
8730                 count = hw_mode->num_channels;
8731         }
8732
8733         len +=
8734             sprintf(&buf[len],
8735                     "Displaying %d channels in 2.4GHz band "
8736                     "(802.11bg):\n", count);
8737
8738         for (i = 0; i < count; i++)
8739                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8740                                channels[i].chan,
8741                                channels[i].power_level,
8742                                channels[i].
8743                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8744                                " (IEEE 802.11h required)" : "",
8745                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8746                                 || (channels[i].
8747                                     flag &
8748                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8749                                ", IBSS",
8750                                channels[i].
8751                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8752                                "active/passive" : "passive only");
8753
8754         hw_mode = iwl4965_get_hw_mode(priv, MODE_IEEE80211A);
8755         if (hw_mode) {
8756                 channels = hw_mode->channels;
8757                 count = hw_mode->num_channels;
8758         } else {
8759                 channels = NULL;
8760                 count = 0;
8761         }
8762
8763         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8764                        "(802.11a):\n", count);
8765
8766         for (i = 0; i < count; i++)
8767                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8768                                channels[i].chan,
8769                                channels[i].power_level,
8770                                channels[i].
8771                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8772                                " (IEEE 802.11h required)" : "",
8773                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8774                                 || (channels[i].
8775                                     flag &
8776                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8777                                ", IBSS",
8778                                channels[i].
8779                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8780                                "active/passive" : "passive only");
8781
8782         return len;
8783 }
8784
8785 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8786
8787 static ssize_t show_statistics(struct device *d,
8788                                struct device_attribute *attr, char *buf)
8789 {
8790         struct iwl4965_priv *priv = dev_get_drvdata(d);
8791         u32 size = sizeof(struct iwl4965_notif_statistics);
8792         u32 len = 0, ofs = 0;
8793         u8 *data = (u8 *) & priv->statistics;
8794         int rc = 0;
8795
8796         if (!iwl4965_is_alive(priv))
8797                 return -EAGAIN;
8798
8799         mutex_lock(&priv->mutex);
8800         rc = iwl4965_send_statistics_request(priv);
8801         mutex_unlock(&priv->mutex);
8802
8803         if (rc) {
8804                 len = sprintf(buf,
8805                               "Error sending statistics request: 0x%08X\n", rc);
8806                 return len;
8807         }
8808
8809         while (size && (PAGE_SIZE - len)) {
8810                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8811                                    PAGE_SIZE - len, 1);
8812                 len = strlen(buf);
8813                 if (PAGE_SIZE - len)
8814                         buf[len++] = '\n';
8815
8816                 ofs += 16;
8817                 size -= min(size, 16U);
8818         }
8819
8820         return len;
8821 }
8822
8823 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8824
8825 static ssize_t show_antenna(struct device *d,
8826                             struct device_attribute *attr, char *buf)
8827 {
8828         struct iwl4965_priv *priv = dev_get_drvdata(d);
8829
8830         if (!iwl4965_is_alive(priv))
8831                 return -EAGAIN;
8832
8833         return sprintf(buf, "%d\n", priv->antenna);
8834 }
8835
8836 static ssize_t store_antenna(struct device *d,
8837                              struct device_attribute *attr,
8838                              const char *buf, size_t count)
8839 {
8840         int ant;
8841         struct iwl4965_priv *priv = dev_get_drvdata(d);
8842
8843         if (count == 0)
8844                 return 0;
8845
8846         if (sscanf(buf, "%1i", &ant) != 1) {
8847                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8848                 return count;
8849         }
8850
8851         if ((ant >= 0) && (ant <= 2)) {
8852                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8853                 priv->antenna = (enum iwl4965_antenna)ant;
8854         } else
8855                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8856
8857
8858         return count;
8859 }
8860
8861 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8862
8863 static ssize_t show_status(struct device *d,
8864                            struct device_attribute *attr, char *buf)
8865 {
8866         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8867         if (!iwl4965_is_alive(priv))
8868                 return -EAGAIN;
8869         return sprintf(buf, "0x%08x\n", (int)priv->status);
8870 }
8871
8872 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8873
8874 static ssize_t dump_error_log(struct device *d,
8875                               struct device_attribute *attr,
8876                               const char *buf, size_t count)
8877 {
8878         char *p = (char *)buf;
8879
8880         if (p[0] == '1')
8881                 iwl4965_dump_nic_error_log((struct iwl4965_priv *)d->driver_data);
8882
8883         return strnlen(buf, count);
8884 }
8885
8886 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8887
8888 static ssize_t dump_event_log(struct device *d,
8889                               struct device_attribute *attr,
8890                               const char *buf, size_t count)
8891 {
8892         char *p = (char *)buf;
8893
8894         if (p[0] == '1')
8895                 iwl4965_dump_nic_event_log((struct iwl4965_priv *)d->driver_data);
8896
8897         return strnlen(buf, count);
8898 }
8899
8900 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8901
8902 /*****************************************************************************
8903  *
8904  * driver setup and teardown
8905  *
8906  *****************************************************************************/
8907
8908 static void iwl4965_setup_deferred_work(struct iwl4965_priv *priv)
8909 {
8910         priv->workqueue = create_workqueue(DRV_NAME);
8911
8912         init_waitqueue_head(&priv->wait_command_queue);
8913
8914         INIT_WORK(&priv->up, iwl4965_bg_up);
8915         INIT_WORK(&priv->restart, iwl4965_bg_restart);
8916         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
8917         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
8918         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
8919         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
8920         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
8921         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
8922         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
8923         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
8924         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
8925         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
8926
8927         iwl4965_hw_setup_deferred_work(priv);
8928
8929         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8930                      iwl4965_irq_tasklet, (unsigned long)priv);
8931 }
8932
8933 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv)
8934 {
8935         iwl4965_hw_cancel_deferred_work(priv);
8936
8937         cancel_delayed_work_sync(&priv->init_alive_start);
8938         cancel_delayed_work(&priv->scan_check);
8939         cancel_delayed_work(&priv->alive_start);
8940         cancel_delayed_work(&priv->post_associate);
8941         cancel_work_sync(&priv->beacon_update);
8942 }
8943
8944 static struct attribute *iwl4965_sysfs_entries[] = {
8945         &dev_attr_antenna.attr,
8946         &dev_attr_channels.attr,
8947         &dev_attr_dump_errors.attr,
8948         &dev_attr_dump_events.attr,
8949         &dev_attr_flags.attr,
8950         &dev_attr_filter_flags.attr,
8951 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8952         &dev_attr_measurement.attr,
8953 #endif
8954         &dev_attr_power_level.attr,
8955         &dev_attr_retry_rate.attr,
8956         &dev_attr_rf_kill.attr,
8957         &dev_attr_rs_window.attr,
8958         &dev_attr_statistics.attr,
8959         &dev_attr_status.attr,
8960         &dev_attr_temperature.attr,
8961         &dev_attr_tune.attr,
8962         &dev_attr_tx_power.attr,
8963
8964         NULL
8965 };
8966
8967 static struct attribute_group iwl4965_attribute_group = {
8968         .name = NULL,           /* put in device directory */
8969         .attrs = iwl4965_sysfs_entries,
8970 };
8971
8972 static struct ieee80211_ops iwl4965_hw_ops = {
8973         .tx = iwl4965_mac_tx,
8974         .start = iwl4965_mac_start,
8975         .stop = iwl4965_mac_stop,
8976         .add_interface = iwl4965_mac_add_interface,
8977         .remove_interface = iwl4965_mac_remove_interface,
8978         .config = iwl4965_mac_config,
8979         .config_interface = iwl4965_mac_config_interface,
8980         .configure_filter = iwl4965_configure_filter,
8981         .set_key = iwl4965_mac_set_key,
8982         .get_stats = iwl4965_mac_get_stats,
8983         .get_tx_stats = iwl4965_mac_get_tx_stats,
8984         .conf_tx = iwl4965_mac_conf_tx,
8985         .get_tsf = iwl4965_mac_get_tsf,
8986         .reset_tsf = iwl4965_mac_reset_tsf,
8987         .beacon_update = iwl4965_mac_beacon_update,
8988         .bss_info_changed = iwl4965_bss_info_changed,
8989 #ifdef CONFIG_IWL4965_HT
8990         .conf_ht = iwl4965_mac_conf_ht,
8991         .ampdu_action = iwl4965_mac_ampdu_action,
8992 #ifdef CONFIG_IWL4965_HT_AGG
8993         .ht_tx_agg_start = iwl4965_mac_ht_tx_agg_start,
8994         .ht_tx_agg_stop = iwl4965_mac_ht_tx_agg_stop,
8995 #endif  /* CONFIG_IWL4965_HT_AGG */
8996 #endif  /* CONFIG_IWL4965_HT */
8997         .hw_scan = iwl4965_mac_hw_scan
8998 };
8999
9000 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
9001 {
9002         int err = 0;
9003         struct iwl4965_priv *priv;
9004         struct ieee80211_hw *hw;
9005         int i;
9006         DECLARE_MAC_BUF(mac);
9007
9008         /* Disabling hardware scan means that mac80211 will perform scans
9009          * "the hard way", rather than using device's scan. */
9010         if (iwl4965_param_disable_hw_scan) {
9011                 IWL_DEBUG_INFO("Disabling hw_scan\n");
9012                 iwl4965_hw_ops.hw_scan = NULL;
9013         }
9014
9015         if ((iwl4965_param_queues_num > IWL_MAX_NUM_QUEUES) ||
9016             (iwl4965_param_queues_num < IWL_MIN_NUM_QUEUES)) {
9017                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
9018                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
9019                 err = -EINVAL;
9020                 goto out;
9021         }
9022
9023         /* mac80211 allocates memory for this device instance, including
9024          *   space for this driver's private structure */
9025         hw = ieee80211_alloc_hw(sizeof(struct iwl4965_priv), &iwl4965_hw_ops);
9026         if (hw == NULL) {
9027                 IWL_ERROR("Can not allocate network device\n");
9028                 err = -ENOMEM;
9029                 goto out;
9030         }
9031         SET_IEEE80211_DEV(hw, &pdev->dev);
9032
9033         hw->rate_control_algorithm = "iwl-4965-rs";
9034
9035         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
9036         priv = hw->priv;
9037         priv->hw = hw;
9038
9039         priv->pci_dev = pdev;
9040         priv->antenna = (enum iwl4965_antenna)iwl4965_param_antenna;
9041 #ifdef CONFIG_IWL4965_DEBUG
9042         iwl4965_debug_level = iwl4965_param_debug;
9043         atomic_set(&priv->restrict_refcnt, 0);
9044 #endif
9045         priv->retry_rate = 1;
9046
9047         priv->ibss_beacon = NULL;
9048
9049         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
9050          *   the range of signal quality values that we'll provide.
9051          * Negative values for level/noise indicate that we'll provide dBm.
9052          * For WE, at least, non-0 values here *enable* display of values
9053          *   in app (iwconfig). */
9054         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
9055         hw->max_noise = -20;    /* noise level, negative indicates dBm */
9056         hw->max_signal = 100;   /* link quality indication (%) */
9057
9058         /* Tell mac80211 our Tx characteristics */
9059         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
9060
9061         /* Default value; 4 EDCA QOS priorities */
9062         hw->queues = 4;
9063 #ifdef CONFIG_IWL4965_HT
9064 #ifdef CONFIG_IWL4965_HT_AGG
9065         /* Enhanced value; more queues, to support 11n aggregation */
9066         hw->queues = 16;
9067 #endif /* CONFIG_IWL4965_HT_AGG */
9068 #endif /* CONFIG_IWL4965_HT */
9069
9070         spin_lock_init(&priv->lock);
9071         spin_lock_init(&priv->power_data.lock);
9072         spin_lock_init(&priv->sta_lock);
9073         spin_lock_init(&priv->hcmd_lock);
9074         spin_lock_init(&priv->lq_mngr.lock);
9075
9076         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
9077                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
9078
9079         INIT_LIST_HEAD(&priv->free_frames);
9080
9081         mutex_init(&priv->mutex);
9082         if (pci_enable_device(pdev)) {
9083                 err = -ENODEV;
9084                 goto out_ieee80211_free_hw;
9085         }
9086
9087         pci_set_master(pdev);
9088
9089         /* Clear the driver's (not device's) station table */
9090         iwl4965_clear_stations_table(priv);
9091
9092         priv->data_retry_limit = -1;
9093         priv->ieee_channels = NULL;
9094         priv->ieee_rates = NULL;
9095         priv->phymode = -1;
9096
9097         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
9098         if (!err)
9099                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
9100         if (err) {
9101                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
9102                 goto out_pci_disable_device;
9103         }
9104
9105         pci_set_drvdata(pdev, priv);
9106         err = pci_request_regions(pdev, DRV_NAME);
9107         if (err)
9108                 goto out_pci_disable_device;
9109
9110         /* We disable the RETRY_TIMEOUT register (0x41) to keep
9111          * PCI Tx retries from interfering with C3 CPU state */
9112         pci_write_config_byte(pdev, 0x41, 0x00);
9113
9114         priv->hw_base = pci_iomap(pdev, 0, 0);
9115         if (!priv->hw_base) {
9116                 err = -ENODEV;
9117                 goto out_pci_release_regions;
9118         }
9119
9120         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
9121                         (unsigned long long) pci_resource_len(pdev, 0));
9122         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9123
9124         /* Initialize module parameter values here */
9125
9126         /* Disable radio (SW RF KILL) via parameter when loading driver */
9127         if (iwl4965_param_disable) {
9128                 set_bit(STATUS_RF_KILL_SW, &priv->status);
9129                 IWL_DEBUG_INFO("Radio disabled.\n");
9130         }
9131
9132         priv->iw_mode = IEEE80211_IF_TYPE_STA;
9133
9134         priv->ps_mode = 0;
9135         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9136         priv->valid_antenna = 0x7;      /* assume all 3 connected */
9137         priv->ps_mode = IWL_MIMO_PS_NONE;
9138
9139         /* Choose which receivers/antennas to use */
9140         iwl4965_set_rxon_chain(priv);
9141
9142         printk(KERN_INFO DRV_NAME
9143                ": Detected Intel Wireless WiFi Link 4965AGN\n");
9144
9145         /* Device-specific setup */
9146         if (iwl4965_hw_set_hw_setting(priv)) {
9147                 IWL_ERROR("failed to set hw settings\n");
9148                 goto out_iounmap;
9149         }
9150
9151 #ifdef CONFIG_IWL4965_QOS
9152         if (iwl4965_param_qos_enable)
9153                 priv->qos_data.qos_enable = 1;
9154
9155         iwl4965_reset_qos(priv);
9156
9157         priv->qos_data.qos_active = 0;
9158         priv->qos_data.qos_cap.val = 0;
9159 #endif /* CONFIG_IWL4965_QOS */
9160
9161         iwl4965_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9162         iwl4965_setup_deferred_work(priv);
9163         iwl4965_setup_rx_handlers(priv);
9164
9165         priv->rates_mask = IWL_RATES_MASK;
9166         /* If power management is turned on, default to AC mode */
9167         priv->power_mode = IWL_POWER_AC;
9168         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9169
9170         iwl4965_disable_interrupts(priv);
9171
9172         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9173         if (err) {
9174                 IWL_ERROR("failed to create sysfs device attributes\n");
9175                 goto out_release_irq;
9176         }
9177
9178         /* nic init */
9179         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
9180                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
9181
9182         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
9183         err = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
9184                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
9185                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
9186         if (err < 0) {
9187                 IWL_DEBUG_INFO("Failed to init the card\n");
9188                 goto out_remove_sysfs;
9189         }
9190         /* Read the EEPROM */
9191         err = iwl4965_eeprom_init(priv);
9192         if (err) {
9193                 IWL_ERROR("Unable to init EEPROM\n");
9194                 goto out_remove_sysfs;
9195         }
9196         /* MAC Address location in EEPROM same for 3945/4965 */
9197         get_eeprom_mac(priv, priv->mac_addr);
9198         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
9199         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
9200
9201         iwl4965_rate_control_register(priv->hw);
9202         err = ieee80211_register_hw(priv->hw);
9203         if (err) {
9204                 IWL_ERROR("Failed to register network device (error %d)\n", err);
9205                 goto out_remove_sysfs;
9206         }
9207
9208         priv->hw->conf.beacon_int = 100;
9209         priv->mac80211_registered = 1;
9210         pci_save_state(pdev);
9211         pci_disable_device(pdev);
9212
9213         return 0;
9214
9215  out_remove_sysfs:
9216         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9217
9218  out_release_irq:
9219         destroy_workqueue(priv->workqueue);
9220         priv->workqueue = NULL;
9221         iwl4965_unset_hw_setting(priv);
9222
9223  out_iounmap:
9224         pci_iounmap(pdev, priv->hw_base);
9225  out_pci_release_regions:
9226         pci_release_regions(pdev);
9227  out_pci_disable_device:
9228         pci_disable_device(pdev);
9229         pci_set_drvdata(pdev, NULL);
9230  out_ieee80211_free_hw:
9231         ieee80211_free_hw(priv->hw);
9232  out:
9233         return err;
9234 }
9235
9236 static void iwl4965_pci_remove(struct pci_dev *pdev)
9237 {
9238         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9239         struct list_head *p, *q;
9240         int i;
9241
9242         if (!priv)
9243                 return;
9244
9245         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9246
9247         set_bit(STATUS_EXIT_PENDING, &priv->status);
9248
9249         iwl4965_down(priv);
9250
9251         /* Free MAC hash list for ADHOC */
9252         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9253                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9254                         list_del(p);
9255                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
9256                 }
9257         }
9258
9259         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9260
9261         iwl4965_dealloc_ucode_pci(priv);
9262
9263         if (priv->rxq.bd)
9264                 iwl4965_rx_queue_free(priv, &priv->rxq);
9265         iwl4965_hw_txq_ctx_free(priv);
9266
9267         iwl4965_unset_hw_setting(priv);
9268         iwl4965_clear_stations_table(priv);
9269
9270         if (priv->mac80211_registered) {
9271                 ieee80211_unregister_hw(priv->hw);
9272                 iwl4965_rate_control_unregister(priv->hw);
9273         }
9274
9275         /*netif_stop_queue(dev); */
9276         flush_workqueue(priv->workqueue);
9277
9278         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
9279          * priv->workqueue... so we can't take down the workqueue
9280          * until now... */
9281         destroy_workqueue(priv->workqueue);
9282         priv->workqueue = NULL;
9283
9284         pci_iounmap(pdev, priv->hw_base);
9285         pci_release_regions(pdev);
9286         pci_disable_device(pdev);
9287         pci_set_drvdata(pdev, NULL);
9288
9289         kfree(priv->channel_info);
9290
9291         kfree(priv->ieee_channels);
9292         kfree(priv->ieee_rates);
9293
9294         if (priv->ibss_beacon)
9295                 dev_kfree_skb(priv->ibss_beacon);
9296
9297         ieee80211_free_hw(priv->hw);
9298 }
9299
9300 #ifdef CONFIG_PM
9301
9302 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9303 {
9304         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9305
9306         if (priv->is_open) {
9307                 set_bit(STATUS_IN_SUSPEND, &priv->status);
9308                 iwl4965_mac_stop(priv->hw);
9309                 priv->is_open = 1;
9310         }
9311
9312         pci_set_power_state(pdev, PCI_D3hot);
9313
9314         return 0;
9315 }
9316
9317 static int iwl4965_pci_resume(struct pci_dev *pdev)
9318 {
9319         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9320
9321         pci_set_power_state(pdev, PCI_D0);
9322
9323         if (priv->is_open)
9324                 iwl4965_mac_start(priv->hw);
9325
9326         clear_bit(STATUS_IN_SUSPEND, &priv->status);
9327         return 0;
9328 }
9329
9330 #endif /* CONFIG_PM */
9331
9332 /*****************************************************************************
9333  *
9334  * driver and module entry point
9335  *
9336  *****************************************************************************/
9337
9338 static struct pci_driver iwl4965_driver = {
9339         .name = DRV_NAME,
9340         .id_table = iwl4965_hw_card_ids,
9341         .probe = iwl4965_pci_probe,
9342         .remove = __devexit_p(iwl4965_pci_remove),
9343 #ifdef CONFIG_PM
9344         .suspend = iwl4965_pci_suspend,
9345         .resume = iwl4965_pci_resume,
9346 #endif
9347 };
9348
9349 static int __init iwl4965_init(void)
9350 {
9351
9352         int ret;
9353         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9354         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9355         ret = pci_register_driver(&iwl4965_driver);
9356         if (ret) {
9357                 IWL_ERROR("Unable to initialize PCI module\n");
9358                 return ret;
9359         }
9360 #ifdef CONFIG_IWL4965_DEBUG
9361         ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
9362         if (ret) {
9363                 IWL_ERROR("Unable to create driver sysfs file\n");
9364                 pci_unregister_driver(&iwl4965_driver);
9365                 return ret;
9366         }
9367 #endif
9368
9369         return ret;
9370 }
9371
9372 static void __exit iwl4965_exit(void)
9373 {
9374 #ifdef CONFIG_IWL4965_DEBUG
9375         driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
9376 #endif
9377         pci_unregister_driver(&iwl4965_driver);
9378 }
9379
9380 module_param_named(antenna, iwl4965_param_antenna, int, 0444);
9381 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9382 module_param_named(disable, iwl4965_param_disable, int, 0444);
9383 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9384 module_param_named(hwcrypto, iwl4965_param_hwcrypto, int, 0444);
9385 MODULE_PARM_DESC(hwcrypto,
9386                  "using hardware crypto engine (default 0 [software])\n");
9387 module_param_named(debug, iwl4965_param_debug, int, 0444);
9388 MODULE_PARM_DESC(debug, "debug output mask");
9389 module_param_named(disable_hw_scan, iwl4965_param_disable_hw_scan, int, 0444);
9390 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9391
9392 module_param_named(queues_num, iwl4965_param_queues_num, int, 0444);
9393 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9394
9395 /* QoS */
9396 module_param_named(qos_enable, iwl4965_param_qos_enable, int, 0444);
9397 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9398 module_param_named(amsdu_size_8K, iwl4965_param_amsdu_size_8K, int, 0444);
9399 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
9400
9401 module_exit(iwl4965_exit);
9402 module_init(iwl4965_init);