SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/lib80211.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #include "iwl-3945-core.h"
  50 #include "iwl-3945.h"
  51 #include "iwl-helpers.h"
  52
  53 #ifdef CONFIG_IWL3945_DEBUG
  54 u32 iwl3945_debug_level;
  55 #endif
  56
  57 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
  58                                   struct iwl3945_tx_queue *txq);
  59
  60 /******************************************************************************
  61  *
  62  * module boiler plate
  63  *
  64  ******************************************************************************/
  65
  66 /* module parameters */
  67 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  68 static int iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  69 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  70 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  71 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  72 static int iwl3945_param_qos_enable = 1; /* def: 1 = use quality of service */
  73 int iwl3945_param_queues_num = IWL39_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  74
  75 /*
  76  * module name, copyright, version, etc.
  77  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  78  */
  79
  80 #define DRV_DESCRIPTION \
  81 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  82
  83 #ifdef CONFIG_IWL3945_DEBUG
  84 #define VD "d"
  85 #else
  86 #define VD
  87 #endif
  88
  89 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  90 #define VS "s"
  91 #else
  92 #define VS
  93 #endif
  94
  95 #define IWLWIFI_VERSION "1.2.26k" VD VS
  96 #define DRV_COPYRIGHT   "Copyright(c) 2003-2008 Intel Corporation"
  97 #define DRV_VERSION     IWLWIFI_VERSION
  98
  99
 100 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 101 MODULE_VERSION(DRV_VERSION);
 102 MODULE_AUTHOR(DRV_COPYRIGHT);
 103 MODULE_LICENSE("GPL");
 104
 105 static const struct ieee80211_supported_band *iwl3945_get_band(
 106                 struct iwl3945_priv *priv, enum ieee80211_band band)
 107 {
 108         return priv->hw->wiphy->bands[band];
 109 }
 110
 111 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 112  * DMA services
 113  *
 114  * Theory of operation
 115  *
 116  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 117  * of buffer descriptors, each of which points to one or more data buffers for
 118  * the device to read from or fill.  Driver and device exchange status of each
 119  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 120  * entries in each circular buffer, to protect against confusing empty and full
 121  * queue states.
 122  *
 123  * The device reads or writes the data in the queues via the device's several
 124  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 125  *
 126  * For Tx queue, there are low mark and high mark limits. If, after queuing
 127  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 128  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 129  * Tx queue resumed.
 130  *
 131  * The 3945 operates with six queues:  One receive queue, one transmit queue
 132  * (#4) for sending commands to the device firmware, and four transmit queues
 133  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 134  ***************************************************/
 135
 136 int iwl3945_queue_space(const struct iwl3945_queue *q)
 137 {
 138         int s = q->read_ptr - q->write_ptr;
 139
 140         if (q->read_ptr > q->write_ptr)
 141                 s -= q->n_bd;
 142
 143         if (s <= 0)
 144                 s += q->n_window;
 145         /* keep some reserve to not confuse empty and full situations */
 146         s -= 2;
 147         if (s < 0)
 148                 s = 0;
 149         return s;
 150 }
 151
 152 int iwl3945_x2_queue_used(const struct iwl3945_queue *q, int i)
 153 {
 154         return q->write_ptr > q->read_ptr ?
 155                 (i >= q->read_ptr && i < q->write_ptr) :
 156                 !(i < q->read_ptr && i >= q->write_ptr);
 157 }
 158
 159
 160 static inline u8 get_cmd_index(struct iwl3945_queue *q, u32 index, int is_huge)
 161 {
 162         /* This is for scan command, the big buffer at end of command array */
 163         if (is_huge)
 164                 return q->n_window;     /* must be power of 2 */
 165
 166         /* Otherwise, use normal size buffers */
 167         return index & (q->n_window - 1);
 168 }
 169
 170 /**
 171  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 172  */
 173 static int iwl3945_queue_init(struct iwl3945_priv *priv, struct iwl3945_queue *q,
 174                           int count, int slots_num, u32 id)
 175 {
 176         q->n_bd = count;
 177         q->n_window = slots_num;
 178         q->id = id;
 179
 180         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 181          * and iwl_queue_dec_wrap are broken. */
 182         BUG_ON(!is_power_of_2(count));
 183
 184         /* slots_num must be power-of-two size, otherwise
 185          * get_cmd_index is broken. */
 186         BUG_ON(!is_power_of_2(slots_num));
 187
 188         q->low_mark = q->n_window / 4;
 189         if (q->low_mark < 4)
 190                 q->low_mark = 4;
 191
 192         q->high_mark = q->n_window / 8;
 193         if (q->high_mark < 2)
 194                 q->high_mark = 2;
 195
 196         q->write_ptr = q->read_ptr = 0;
 197
 198         return 0;
 199 }
 200
 201 /**
 202  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 203  */
 204 static int iwl3945_tx_queue_alloc(struct iwl3945_priv *priv,
 205                               struct iwl3945_tx_queue *txq, u32 id)
 206 {
 207         struct pci_dev *dev = priv->pci_dev;
 208
 209         /* Driver private data, only for Tx (not command) queues,
 210          * not shared with device. */
 211         if (id != IWL_CMD_QUEUE_NUM) {
 212                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 213                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 214                 if (!txq->txb) {
 215                         IWL_ERROR("kmalloc for auxiliary BD "
 216                                   "structures failed\n");
 217                         goto error;
 218                 }
 219         } else
 220                 txq->txb = NULL;
 221
 222         /* Circular buffer of transmit frame descriptors (TFDs),
 223          * shared with device */
 224         txq->bd = pci_alloc_consistent(dev,
 225                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 226                         &txq->q.dma_addr);
 227
 228         if (!txq->bd) {
 229                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 230                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 231                 goto error;
 232         }
 233         txq->q.id = id;
 234
 235         return 0;
 236
 237  error:
 238         kfree(txq->txb);
 239         txq->txb = NULL;
 240
 241         return -ENOMEM;
 242 }
 243
 244 /**
 245  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 246  */
 247 int iwl3945_tx_queue_init(struct iwl3945_priv *priv,
 248                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 249 {
 250         struct pci_dev *dev = priv->pci_dev;
 251         int len;
 252         int rc = 0;
 253
 254         /*
 255          * Alloc buffer array for commands (Tx or other types of commands).
 256          * For the command queue (#4), allocate command space + one big
 257          * command for scan, since scan command is very huge; the system will
 258          * not have two scans at the same time, so only one is needed.
 259          * For data Tx queues (all other queues), no super-size command
 260          * space is needed.
 261          */
 262         len = sizeof(struct iwl3945_cmd) * slots_num;
 263         if (txq_id == IWL_CMD_QUEUE_NUM)
 264                 len +=  IWL_MAX_SCAN_SIZE;
 265         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 266         if (!txq->cmd)
 267                 return -ENOMEM;
 268
 269         /* Alloc driver data array and TFD circular buffer */
 270         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 271         if (rc) {
 272                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 273
 274                 return -ENOMEM;
 275         }
 276         txq->need_update = 0;
 277
 278         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 279          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 280         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 281
 282         /* Initialize queue high/low-water, head/tail indexes */
 283         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 284
 285         /* Tell device where to find queue, enable DMA channel. */
 286         iwl3945_hw_tx_queue_init(priv, txq);
 287
 288         return 0;
 289 }
 290
 291 /**
 292  * iwl3945_tx_queue_free - Deallocate DMA queue.
 293  * @txq: Transmit queue to deallocate.
 294  *
 295  * Empty queue by removing and destroying all BD's.
 296  * Free all buffers.
 297  * 0-fill, but do not free "txq" descriptor structure.
 298  */
 299 void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *txq)
 300 {
 301         struct iwl3945_queue *q = &txq->q;
 302         struct pci_dev *dev = priv->pci_dev;
 303         int len;
 304
 305         if (q->n_bd == 0)
 306                 return;
 307
 308         /* first, empty all BD's */
 309         for (; q->write_ptr != q->read_ptr;
 310              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 311                 iwl3945_hw_txq_free_tfd(priv, txq);
 312
 313         len = sizeof(struct iwl3945_cmd) * q->n_window;
 314         if (q->id == IWL_CMD_QUEUE_NUM)
 315                 len += IWL_MAX_SCAN_SIZE;
 316
 317         /* De-alloc array of command/tx buffers */
 318         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 319
 320         /* De-alloc circular buffer of TFDs */
 321         if (txq->q.n_bd)
 322                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 323                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 324
 325         /* De-alloc array of per-TFD driver data */
 326         kfree(txq->txb);
 327         txq->txb = NULL;
 328
 329         /* 0-fill queue descriptor structure */
 330         memset(txq, 0, sizeof(*txq));
 331 }
 332
 333 const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 334
 335 /*************** STATION TABLE MANAGEMENT ****
 336  * mac80211 should be examined to determine if sta_info is duplicating
 337  * the functionality provided here
 338  */
 339
 340 /**************************************************************/
 341 #if 0 /* temporary disable till we add real remove station */
 342 /**
 343  * iwl3945_remove_station - Remove driver's knowledge of station.
 344  *
 345  * NOTE:  This does not remove station from device's station table.
 346  */
 347 static u8 iwl3945_remove_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap)
 348 {
 349         int index = IWL_INVALID_STATION;
 350         int i;
 351         unsigned long flags;
 352
 353         spin_lock_irqsave(&priv->sta_lock, flags);
 354
 355         if (is_ap)
 356                 index = IWL_AP_ID;
 357         else if (is_broadcast_ether_addr(addr))
 358                 index = priv->hw_setting.bcast_sta_id;
 359         else
 360                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 361                         if (priv->stations[i].used &&
 362                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 363                                                 addr)) {
 364                                 index = i;
 365                                 break;
 366                         }
 367
 368         if (unlikely(index == IWL_INVALID_STATION))
 369                 goto out;
 370
 371         if (priv->stations[index].used) {
 372                 priv->stations[index].used = 0;
 373                 priv->num_stations--;
 374         }
 375
 376         BUG_ON(priv->num_stations < 0);
 377
 378 out:
 379         spin_unlock_irqrestore(&priv->sta_lock, flags);
 380         return 0;
 381 }
 382 #endif
 383
 384 /**
 385  * iwl3945_clear_stations_table - Clear the driver's station table
 386  *
 387  * NOTE:  This does not clear or otherwise alter the device's station table.
 388  */
 389 static void iwl3945_clear_stations_table(struct iwl3945_priv *priv)
 390 {
 391         unsigned long flags;
 392
 393         spin_lock_irqsave(&priv->sta_lock, flags);
 394
 395         priv->num_stations = 0;
 396         memset(priv->stations, 0, sizeof(priv->stations));
 397
 398         spin_unlock_irqrestore(&priv->sta_lock, flags);
 399 }
 400
 401 /**
 402  * iwl3945_add_station - Add station to station tables in driver and device
 403  */
 404 u8 iwl3945_add_station(struct iwl3945_priv *priv, const u8 *addr, int is_ap, u8 flags)
 405 {
 406         int i;
 407         int index = IWL_INVALID_STATION;
 408         struct iwl3945_station_entry *station;
 409         unsigned long flags_spin;
 410         u8 rate;
 411
 412         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 413         if (is_ap)
 414                 index = IWL_AP_ID;
 415         else if (is_broadcast_ether_addr(addr))
 416                 index = priv->hw_setting.bcast_sta_id;
 417         else
 418                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 419                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 420                                                 addr)) {
 421                                 index = i;
 422                                 break;
 423                         }
 424
 425                         if (!priv->stations[i].used &&
 426                             index == IWL_INVALID_STATION)
 427                                 index = i;
 428                 }
 429
 430         /* These two conditions has the same outcome but keep them separate
 431           since they have different meaning */
 432         if (unlikely(index == IWL_INVALID_STATION)) {
 433                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 434                 return index;
 435         }
 436
 437         if (priv->stations[index].used &&
 438            !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 439                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 440                 return index;
 441         }
 442
 443         IWL_DEBUG_ASSOC("Add STA ID %d: %pM\n", index, addr);
 444         station = &priv->stations[index];
 445         station->used = 1;
 446         priv->num_stations++;
 447
 448         /* Set up the REPLY_ADD_STA command to send to device */
 449         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 450         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 451         station->sta.mode = 0;
 452         station->sta.sta.sta_id = index;
 453         station->sta.station_flags = 0;
 454
 455         if (priv->band == IEEE80211_BAND_5GHZ)
 456                 rate = IWL_RATE_6M_PLCP;
 457         else
 458                 rate =  IWL_RATE_1M_PLCP;
 459
 460         /* Turn on both antennas for the station... */
 461         station->sta.rate_n_flags =
 462                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 463         station->current_rate.rate_n_flags =
 464                         le16_to_cpu(station->sta.rate_n_flags);
 465
 466         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 467
 468         /* Add station to device's station table */
 469         iwl3945_send_add_station(priv, &station->sta, flags);
 470         return index;
 471
 472 }
 473
 474 /*************** DRIVER STATUS FUNCTIONS   *****/
 475
 476 static inline int iwl3945_is_ready(struct iwl3945_priv *priv)
 477 {
 478         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 479          * set but EXIT_PENDING is not */
 480         return test_bit(STATUS_READY, &priv->status) &&
 481                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 482                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 483 }
 484
 485 static inline int iwl3945_is_alive(struct iwl3945_priv *priv)
 486 {
 487         return test_bit(STATUS_ALIVE, &priv->status);
 488 }
 489
 490 static inline int iwl3945_is_init(struct iwl3945_priv *priv)
 491 {
 492         return test_bit(STATUS_INIT, &priv->status);
 493 }
 494
 495 static inline int iwl3945_is_rfkill_sw(struct iwl3945_priv *priv)
 496 {
 497         return test_bit(STATUS_RF_KILL_SW, &priv->status);
 498 }
 499
 500 static inline int iwl3945_is_rfkill_hw(struct iwl3945_priv *priv)
 501 {
 502         return test_bit(STATUS_RF_KILL_HW, &priv->status);
 503 }
 504
 505 static inline int iwl3945_is_rfkill(struct iwl3945_priv *priv)
 506 {
 507         return iwl3945_is_rfkill_hw(priv) ||
 508                 iwl3945_is_rfkill_sw(priv);
 509 }
 510
 511 static inline int iwl3945_is_ready_rf(struct iwl3945_priv *priv)
 512 {
 513
 514         if (iwl3945_is_rfkill(priv))
 515                 return 0;
 516
 517         return iwl3945_is_ready(priv);
 518 }
 519
 520 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 521
 522 #define IWL_CMD(x) case x : return #x
 523
 524 static const char *get_cmd_string(u8 cmd)
 525 {
 526         switch (cmd) {
 527                 IWL_CMD(REPLY_ALIVE);
 528                 IWL_CMD(REPLY_ERROR);
 529                 IWL_CMD(REPLY_RXON);
 530                 IWL_CMD(REPLY_RXON_ASSOC);
 531                 IWL_CMD(REPLY_QOS_PARAM);
 532                 IWL_CMD(REPLY_RXON_TIMING);
 533                 IWL_CMD(REPLY_ADD_STA);
 534                 IWL_CMD(REPLY_REMOVE_STA);
 535                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 536                 IWL_CMD(REPLY_3945_RX);
 537                 IWL_CMD(REPLY_TX);
 538                 IWL_CMD(REPLY_RATE_SCALE);
 539                 IWL_CMD(REPLY_LEDS_CMD);
 540                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 541                 IWL_CMD(RADAR_NOTIFICATION);
 542                 IWL_CMD(REPLY_QUIET_CMD);
 543                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 544                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 545                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 546                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 547                 IWL_CMD(POWER_TABLE_CMD);
 548                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 549                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 550                 IWL_CMD(REPLY_SCAN_CMD);
 551                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 552                 IWL_CMD(SCAN_START_NOTIFICATION);
 553                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 554                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 555                 IWL_CMD(BEACON_NOTIFICATION);
 556                 IWL_CMD(REPLY_TX_BEACON);
 557                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 558                 IWL_CMD(QUIET_NOTIFICATION);
 559                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 560                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 561                 IWL_CMD(REPLY_BT_CONFIG);
 562                 IWL_CMD(REPLY_STATISTICS_CMD);
 563                 IWL_CMD(STATISTICS_NOTIFICATION);
 564                 IWL_CMD(REPLY_CARD_STATE_CMD);
 565                 IWL_CMD(CARD_STATE_NOTIFICATION);
 566                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 567         default:
 568                 return "UNKNOWN";
 569
 570         }
 571 }
 572
 573 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 574
 575 /**
 576  * iwl3945_enqueue_hcmd - enqueue a uCode command
 577  * @priv: device private data point
 578  * @cmd: a point to the ucode command structure
 579  *
 580  * The function returns < 0 values to indicate the operation is
 581  * failed. On success, it turns the index (> 0) of command in the
 582  * command queue.
 583  */
 584 static int iwl3945_enqueue_hcmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 585 {
 586         struct iwl3945_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 587         struct iwl3945_queue *q = &txq->q;
 588         struct iwl3945_tfd_frame *tfd;
 589         u32 *control_flags;
 590         struct iwl3945_cmd *out_cmd;
 591         u32 idx;
 592         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 593         dma_addr_t phys_addr;
 594         int pad;
 595         u16 count;
 596         int ret;
 597         unsigned long flags;
 598
 599         /* If any of the command structures end up being larger than
 600          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 601          * we will need to increase the size of the TFD entries */
 602         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 603                !(cmd->meta.flags & CMD_SIZE_HUGE));
 604
 605
 606         if (iwl3945_is_rfkill(priv)) {
 607                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 608                 return -EIO;
 609         }
 610
 611         if (iwl3945_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 612                 IWL_ERROR("No space for Tx\n");
 613                 return -ENOSPC;
 614         }
 615
 616         spin_lock_irqsave(&priv->hcmd_lock, flags);
 617
 618         tfd = &txq->bd[q->write_ptr];
 619         memset(tfd, 0, sizeof(*tfd));
 620
 621         control_flags = (u32 *) tfd;
 622
 623         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 624         out_cmd = &txq->cmd[idx];
 625
 626         out_cmd->hdr.cmd = cmd->id;
 627         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 628         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 629
 630         /* At this point, the out_cmd now has all of the incoming cmd
 631          * information */
 632
 633         out_cmd->hdr.flags = 0;
 634         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 635                         INDEX_TO_SEQ(q->write_ptr));
 636         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 637                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 638
 639         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 640                         offsetof(struct iwl3945_cmd, hdr);
 641         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 642
 643         pad = U32_PAD(cmd->len);
 644         count = TFD_CTL_COUNT_GET(*control_flags);
 645         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 646
 647         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 648                      "%d bytes at %d[%d]:%d\n",
 649                      get_cmd_string(out_cmd->hdr.cmd),
 650                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 651                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 652
 653         txq->need_update = 1;
 654
 655         /* Increment and update queue's write index */
 656         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 657         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 658
 659         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 660         return ret ? ret : idx;
 661 }
 662
 663 static int iwl3945_send_cmd_async(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 664 {
 665         int ret;
 666
 667         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 668
 669         /* An asynchronous command can not expect an SKB to be set. */
 670         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 671
 672         /* An asynchronous command MUST have a callback. */
 673         BUG_ON(!cmd->meta.u.callback);
 674
 675         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 676                 return -EBUSY;
 677
 678         ret = iwl3945_enqueue_hcmd(priv, cmd);
 679         if (ret < 0) {
 680                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 681                           get_cmd_string(cmd->id), ret);
 682                 return ret;
 683         }
 684         return 0;
 685 }
 686
 687 static int iwl3945_send_cmd_sync(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 688 {
 689         int cmd_idx;
 690         int ret;
 691
 692         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 693
 694          /* A synchronous command can not have a callback set. */
 695         BUG_ON(cmd->meta.u.callback != NULL);
 696
 697         if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
 698                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 699                           get_cmd_string(cmd->id));
 700                 ret = -EBUSY;
 701                 goto out;
 702         }
 703
 704         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 705
 706         if (cmd->meta.flags & CMD_WANT_SKB)
 707                 cmd->meta.source = &cmd->meta;
 708
 709         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 710         if (cmd_idx < 0) {
 711                 ret = cmd_idx;
 712                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 713                           get_cmd_string(cmd->id), ret);
 714                 goto out;
 715         }
 716
 717         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 718                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 719                         HOST_COMPLETE_TIMEOUT);
 720         if (!ret) {
 721                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 722                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 723                                   get_cmd_string(cmd->id),
 724                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 725
 726                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 727                         ret = -ETIMEDOUT;
 728                         goto cancel;
 729                 }
 730         }
 731
 732         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 733                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 734                                get_cmd_string(cmd->id));
 735                 ret = -ECANCELED;
 736                 goto fail;
 737         }
 738         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 739                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 740                                get_cmd_string(cmd->id));
 741                 ret = -EIO;
 742                 goto fail;
 743         }
 744         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 745                 IWL_ERROR("Error: Response NULL in '%s'\n",
 746                           get_cmd_string(cmd->id));
 747                 ret = -EIO;
 748                 goto out;
 749         }
 750
 751         ret = 0;
 752         goto out;
 753
 754 cancel:
 755         if (cmd->meta.flags & CMD_WANT_SKB) {
 756                 struct iwl3945_cmd *qcmd;
 757
 758                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 759                  * TX cmd queue. Otherwise in case the cmd comes
 760                  * in later, it will possibly set an invalid
 761                  * address (cmd->meta.source). */
 762                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 763                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 764         }
 765 fail:
 766         if (cmd->meta.u.skb) {
 767                 dev_kfree_skb_any(cmd->meta.u.skb);
 768                 cmd->meta.u.skb = NULL;
 769         }
 770 out:
 771         clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
 772         return ret;
 773 }
 774
 775 int iwl3945_send_cmd(struct iwl3945_priv *priv, struct iwl3945_host_cmd *cmd)
 776 {
 777         if (cmd->meta.flags & CMD_ASYNC)
 778                 return iwl3945_send_cmd_async(priv, cmd);
 779
 780         return iwl3945_send_cmd_sync(priv, cmd);
 781 }
 782
 783 int iwl3945_send_cmd_pdu(struct iwl3945_priv *priv, u8 id, u16 len, const void *data)
 784 {
 785         struct iwl3945_host_cmd cmd = {
 786                 .id = id,
 787                 .len = len,
 788                 .data = data,
 789         };
 790
 791         return iwl3945_send_cmd_sync(priv, &cmd);
 792 }
 793
 794 static int __must_check iwl3945_send_cmd_u32(struct iwl3945_priv *priv, u8 id, u32 val)
 795 {
 796         struct iwl3945_host_cmd cmd = {
 797                 .id = id,
 798                 .len = sizeof(val),
 799                 .data = &val,
 800         };
 801
 802         return iwl3945_send_cmd_sync(priv, &cmd);
 803 }
 804
 805 int iwl3945_send_statistics_request(struct iwl3945_priv *priv)
 806 {
 807         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 808 }
 809
 810 /**
 811  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 812  * @band: 2.4 or 5 GHz band
 813  * @channel: Any channel valid for the requested band
 814
 815  * In addition to setting the staging RXON, priv->band is also set.
 816  *
 817  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 818  * in the staging RXON flag structure based on the band
 819  */
 820 static int iwl3945_set_rxon_channel(struct iwl3945_priv *priv,
 821                                     enum ieee80211_band band,
 822                                     u16 channel)
 823 {
 824         if (!iwl3945_get_channel_info(priv, band, channel)) {
 825                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 826                                channel, band);
 827                 return -EINVAL;
 828         }
 829
 830         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 831             (priv->band == band))
 832                 return 0;
 833
 834         priv->staging_rxon.channel = cpu_to_le16(channel);
 835         if (band == IEEE80211_BAND_5GHZ)
 836                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 837         else
 838                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 839
 840         priv->band = band;
 841
 842         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 843
 844         return 0;
 845 }
 846
 847 /**
 848  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 849  *
 850  * NOTE:  This is really only useful during development and can eventually
 851  * be #ifdef'd out once the driver is stable and folks aren't actively
 852  * making changes
 853  */
 854 static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
 855 {
 856         int error = 0;
 857         int counter = 1;
 858
 859         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 860                 error |= le32_to_cpu(rxon->flags &
 861                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 862                                  RXON_FLG_RADAR_DETECT_MSK));
 863                 if (error)
 864                         IWL_WARNING("check 24G fields %d | %d\n",
 865                                     counter++, error);
 866         } else {
 867                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 868                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 869                 if (error)
 870                         IWL_WARNING("check 52 fields %d | %d\n",
 871                                     counter++, error);
 872                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 873                 if (error)
 874                         IWL_WARNING("check 52 CCK %d | %d\n",
 875                                     counter++, error);
 876         }
 877         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 878         if (error)
 879                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 880
 881         /* make sure basic rates 6Mbps and 1Mbps are supported */
 882         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 883                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 884         if (error)
 885                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 886
 887         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 888         if (error)
 889                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 890
 891         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 892                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 893         if (error)
 894                 IWL_WARNING("check CCK and short slot %d | %d\n",
 895                             counter++, error);
 896
 897         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 898                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 899         if (error)
 900                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 901                             counter++, error);
 902
 903         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 904                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 905         if (error)
 906                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 907                             counter++, error);
 908
 909         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 910                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 911                                 RXON_FLG_ANT_A_MSK)) == 0);
 912         if (error)
 913                 IWL_WARNING("check antenna %d %d\n", counter++, error);
 914
 915         if (error)
 916                 IWL_WARNING("Tuning to channel %d\n",
 917                             le16_to_cpu(rxon->channel));
 918
 919         if (error) {
 920                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 921                 return -1;
 922         }
 923         return 0;
 924 }
 925
 926 /**
 927  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 928  * @priv: staging_rxon is compared to active_rxon
 929  *
 930  * If the RXON structure is changing enough to require a new tune,
 931  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 932  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 933  */
 934 static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
 935 {
 936
 937         /* These items are only settable from the full RXON command */
 938         if (!(iwl3945_is_associated(priv)) ||
 939             compare_ether_addr(priv->staging_rxon.bssid_addr,
 940                                priv->active_rxon.bssid_addr) ||
 941             compare_ether_addr(priv->staging_rxon.node_addr,
 942                                priv->active_rxon.node_addr) ||
 943             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 944                                priv->active_rxon.wlap_bssid_addr) ||
 945             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 946             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 947             (priv->staging_rxon.air_propagation !=
 948              priv->active_rxon.air_propagation) ||
 949             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 950                 return 1;
 951
 952         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 953          * be updated with the RXON_ASSOC command -- however only some
 954          * flag transitions are allowed using RXON_ASSOC */
 955
 956         /* Check if we are not switching bands */
 957         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 958             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 959                 return 1;
 960
 961         /* Check if we are switching association toggle */
 962         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 963                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 964                 return 1;
 965
 966         return 0;
 967 }
 968
 969 static int iwl3945_send_rxon_assoc(struct iwl3945_priv *priv)
 970 {
 971         int rc = 0;
 972         struct iwl3945_rx_packet *res = NULL;
 973         struct iwl3945_rxon_assoc_cmd rxon_assoc;
 974         struct iwl3945_host_cmd cmd = {
 975                 .id = REPLY_RXON_ASSOC,
 976                 .len = sizeof(rxon_assoc),
 977                 .meta.flags = CMD_WANT_SKB,
 978                 .data = &rxon_assoc,
 979         };
 980         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging_rxon;
 981         const struct iwl3945_rxon_cmd *rxon2 = &priv->active_rxon;
 982
 983         if ((rxon1->flags == rxon2->flags) &&
 984             (rxon1->filter_flags == rxon2->filter_flags) &&
 985             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 986             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 987                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
 988                 return 0;
 989         }
 990
 991         rxon_assoc.flags = priv->staging_rxon.flags;
 992         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
 993         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
 994         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
 995         rxon_assoc.reserved = 0;
 996
 997         rc = iwl3945_send_cmd_sync(priv, &cmd);
 998         if (rc)
 999                 return rc;
1000
1001         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1002         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1003                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1004                 rc = -EIO;
1005         }
1006
1007         priv->alloc_rxb_skb--;
1008         dev_kfree_skb_any(cmd.meta.u.skb);
1009
1010         return rc;
1011 }
1012
1013 /**
1014  * iwl3945_commit_rxon - commit staging_rxon to hardware
1015  *
1016  * The RXON command in staging_rxon is committed to the hardware and
1017  * the active_rxon structure is updated with the new data.  This
1018  * function correctly transitions out of the RXON_ASSOC_MSK state if
1019  * a HW tune is required based on the RXON structure changes.
1020  */
1021 static int iwl3945_commit_rxon(struct iwl3945_priv *priv)
1022 {
1023         /* cast away the const for active_rxon in this function */
1024         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1025         int rc = 0;
1026
1027         if (!iwl3945_is_alive(priv))
1028                 return -1;
1029
1030         /* always get timestamp with Rx frame */
1031         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1032
1033         /* select antenna */
1034         priv->staging_rxon.flags &=
1035             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1036         priv->staging_rxon.flags |= iwl3945_get_antenna_flags(priv);
1037
1038         rc = iwl3945_check_rxon_cmd(&priv->staging_rxon);
1039         if (rc) {
1040                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1041                 return -EINVAL;
1042         }
1043
1044         /* If we don't need to send a full RXON, we can use
1045          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
1046          * and other flags for the current radio configuration. */
1047         if (!iwl3945_full_rxon_required(priv)) {
1048                 rc = iwl3945_send_rxon_assoc(priv);
1049                 if (rc) {
1050                         IWL_ERROR("Error setting RXON_ASSOC "
1051                                   "configuration (%d).\n", rc);
1052                         return rc;
1053                 }
1054
1055                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1056
1057                 return 0;
1058         }
1059
1060         /* If we are currently associated and the new config requires
1061          * an RXON_ASSOC and the new config wants the associated mask enabled,
1062          * we must clear the associated from the active configuration
1063          * before we apply the new config */
1064         if (iwl3945_is_associated(priv) &&
1065             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1066                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1067                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1068
1069                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1070                                       sizeof(struct iwl3945_rxon_cmd),
1071                                       &priv->active_rxon);
1072
1073                 /* If the mask clearing failed then we set
1074                  * active_rxon back to what it was previously */
1075                 if (rc) {
1076                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1077                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1078                                   "configuration (%d).\n", rc);
1079                         return rc;
1080                 }
1081         }
1082
1083         IWL_DEBUG_INFO("Sending RXON\n"
1084                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1085                        "* channel = %d\n"
1086                        "* bssid = %pM\n",
1087                        ((priv->staging_rxon.filter_flags &
1088                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1089                        le16_to_cpu(priv->staging_rxon.channel),
1090                        priv->staging_rxon.bssid_addr);
1091
1092         /* Apply the new configuration */
1093         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1094                               sizeof(struct iwl3945_rxon_cmd), &priv->staging_rxon);
1095         if (rc) {
1096                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1097                 return rc;
1098         }
1099
1100         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1101
1102         iwl3945_clear_stations_table(priv);
1103
1104         /* If we issue a new RXON command which required a tune then we must
1105          * send a new TXPOWER command or we won't be able to Tx any frames */
1106         rc = iwl3945_hw_reg_send_txpower(priv);
1107         if (rc) {
1108                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1109                 return rc;
1110         }
1111
1112         /* Add the broadcast address so we can send broadcast frames */
1113         if (iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0) ==
1114             IWL_INVALID_STATION) {
1115                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1116                 return -EIO;
1117         }
1118
1119         /* If we have set the ASSOC_MSK and we are in BSS mode then
1120          * add the IWL_AP_ID to the station rate table */
1121         if (iwl3945_is_associated(priv) &&
1122             (priv->iw_mode == NL80211_IFTYPE_STATION))
1123                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr, 1, 0)
1124                     == IWL_INVALID_STATION) {
1125                         IWL_ERROR("Error adding AP address for transmit.\n");
1126                         return -EIO;
1127                 }
1128
1129         /* Init the hardware's rate fallback order based on the band */
1130         rc = iwl3945_init_hw_rate_table(priv);
1131         if (rc) {
1132                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1133                 return -EIO;
1134         }
1135
1136         return 0;
1137 }
1138
1139 static int iwl3945_send_bt_config(struct iwl3945_priv *priv)
1140 {
1141         struct iwl3945_bt_cmd bt_cmd = {
1142                 .flags = 3,
1143                 .lead_time = 0xAA,
1144                 .max_kill = 1,
1145                 .kill_ack_mask = 0,
1146                 .kill_cts_mask = 0,
1147         };
1148
1149         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1150                                 sizeof(struct iwl3945_bt_cmd), &bt_cmd);
1151 }
1152
1153 static int iwl3945_send_scan_abort(struct iwl3945_priv *priv)
1154 {
1155         int rc = 0;
1156         struct iwl3945_rx_packet *res;
1157         struct iwl3945_host_cmd cmd = {
1158                 .id = REPLY_SCAN_ABORT_CMD,
1159                 .meta.flags = CMD_WANT_SKB,
1160         };
1161
1162         /* If there isn't a scan actively going on in the hardware
1163          * then we are in between scan bands and not actually
1164          * actively scanning, so don't send the abort command */
1165         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1166                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1167                 return 0;
1168         }
1169
1170         rc = iwl3945_send_cmd_sync(priv, &cmd);
1171         if (rc) {
1172                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1173                 return rc;
1174         }
1175
1176         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1177         if (res->u.status != CAN_ABORT_STATUS) {
1178                 /* The scan abort will return 1 for success or
1179                  * 2 for "failure".  A failure condition can be
1180                  * due to simply not being in an active scan which
1181                  * can occur if we send the scan abort before we
1182                  * the microcode has notified us that a scan is
1183                  * completed. */
1184                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1185                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1186                 clear_bit(STATUS_SCAN_HW, &priv->status);
1187         }
1188
1189         dev_kfree_skb_any(cmd.meta.u.skb);
1190
1191         return rc;
1192 }
1193
1194 static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
1195                                         struct iwl3945_cmd *cmd,
1196                                         struct sk_buff *skb)
1197 {
1198         return 1;
1199 }
1200
1201 /*
1202  * CARD_STATE_CMD
1203  *
1204  * Use: Sets the device's internal card state to enable, disable, or halt
1205  *
1206  * When in the 'enable' state the card operates as normal.
1207  * When in the 'disable' state, the card enters into a low power mode.
1208  * When in the 'halt' state, the card is shut down and must be fully
1209  * restarted to come back on.
1210  */
1211 static int iwl3945_send_card_state(struct iwl3945_priv *priv, u32 flags, u8 meta_flag)
1212 {
1213         struct iwl3945_host_cmd cmd = {
1214                 .id = REPLY_CARD_STATE_CMD,
1215                 .len = sizeof(u32),
1216                 .data = &flags,
1217                 .meta.flags = meta_flag,
1218         };
1219
1220         if (meta_flag & CMD_ASYNC)
1221                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1222
1223         return iwl3945_send_cmd(priv, &cmd);
1224 }
1225
1226 static int iwl3945_add_sta_sync_callback(struct iwl3945_priv *priv,
1227                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1228 {
1229         struct iwl3945_rx_packet *res = NULL;
1230
1231         if (!skb) {
1232                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1233                 return 1;
1234         }
1235
1236         res = (struct iwl3945_rx_packet *)skb->data;
1237         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1238                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1239                           res->hdr.flags);
1240                 return 1;
1241         }
1242
1243         switch (res->u.add_sta.status) {
1244         case ADD_STA_SUCCESS_MSK:
1245                 break;
1246         default:
1247                 break;
1248         }
1249
1250         /* We didn't cache the SKB; let the caller free it */
1251         return 1;
1252 }
1253
1254 int iwl3945_send_add_station(struct iwl3945_priv *priv,
1255                          struct iwl3945_addsta_cmd *sta, u8 flags)
1256 {
1257         struct iwl3945_rx_packet *res = NULL;
1258         int rc = 0;
1259         struct iwl3945_host_cmd cmd = {
1260                 .id = REPLY_ADD_STA,
1261                 .len = sizeof(struct iwl3945_addsta_cmd),
1262                 .meta.flags = flags,
1263                 .data = sta,
1264         };
1265
1266         if (flags & CMD_ASYNC)
1267                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1268         else
1269                 cmd.meta.flags |= CMD_WANT_SKB;
1270
1271         rc = iwl3945_send_cmd(priv, &cmd);
1272
1273         if (rc || (flags & CMD_ASYNC))
1274                 return rc;
1275
1276         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
1277         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1278                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1279                           res->hdr.flags);
1280                 rc = -EIO;
1281         }
1282
1283         if (rc == 0) {
1284                 switch (res->u.add_sta.status) {
1285                 case ADD_STA_SUCCESS_MSK:
1286                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1287                         break;
1288                 default:
1289                         rc = -EIO;
1290                         IWL_WARNING("REPLY_ADD_STA failed\n");
1291                         break;
1292                 }
1293         }
1294
1295         priv->alloc_rxb_skb--;
1296         dev_kfree_skb_any(cmd.meta.u.skb);
1297
1298         return rc;
1299 }
1300
1301 static int iwl3945_update_sta_key_info(struct iwl3945_priv *priv,
1302                                    struct ieee80211_key_conf *keyconf,
1303                                    u8 sta_id)
1304 {
1305         unsigned long flags;
1306         __le16 key_flags = 0;
1307
1308         switch (keyconf->alg) {
1309         case ALG_CCMP:
1310                 key_flags |= STA_KEY_FLG_CCMP;
1311                 key_flags |= cpu_to_le16(
1312                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1313                 key_flags &= ~STA_KEY_FLG_INVALID;
1314                 break;
1315         case ALG_TKIP:
1316         case ALG_WEP:
1317         default:
1318                 return -EINVAL;
1319         }
1320         spin_lock_irqsave(&priv->sta_lock, flags);
1321         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1322         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1323         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1324                keyconf->keylen);
1325
1326         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1327                keyconf->keylen);
1328         priv->stations[sta_id].sta.key.key_flags = key_flags;
1329         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1330         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1331
1332         spin_unlock_irqrestore(&priv->sta_lock, flags);
1333
1334         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1335         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1336         return 0;
1337 }
1338
1339 static int iwl3945_clear_sta_key_info(struct iwl3945_priv *priv, u8 sta_id)
1340 {
1341         unsigned long flags;
1342
1343         spin_lock_irqsave(&priv->sta_lock, flags);
1344         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1345         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl3945_keyinfo));
1346         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1347         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1348         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1349         spin_unlock_irqrestore(&priv->sta_lock, flags);
1350
1351         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1352         iwl3945_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1353         return 0;
1354 }
1355
1356 static void iwl3945_clear_free_frames(struct iwl3945_priv *priv)
1357 {
1358         struct list_head *element;
1359
1360         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1361                        priv->frames_count);
1362
1363         while (!list_empty(&priv->free_frames)) {
1364                 element = priv->free_frames.next;
1365                 list_del(element);
1366                 kfree(list_entry(element, struct iwl3945_frame, list));
1367                 priv->frames_count--;
1368         }
1369
1370         if (priv->frames_count) {
1371                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1372                             priv->frames_count);
1373                 priv->frames_count = 0;
1374         }
1375 }
1376
1377 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl3945_priv *priv)
1378 {
1379         struct iwl3945_frame *frame;
1380         struct list_head *element;
1381         if (list_empty(&priv->free_frames)) {
1382                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1383                 if (!frame) {
1384                         IWL_ERROR("Could not allocate frame!\n");
1385                         return NULL;
1386                 }
1387
1388                 priv->frames_count++;
1389                 return frame;
1390         }
1391
1392         element = priv->free_frames.next;
1393         list_del(element);
1394         return list_entry(element, struct iwl3945_frame, list);
1395 }
1396
1397 static void iwl3945_free_frame(struct iwl3945_priv *priv, struct iwl3945_frame *frame)
1398 {
1399         memset(frame, 0, sizeof(*frame));
1400         list_add(&frame->list, &priv->free_frames);
1401 }
1402
1403 unsigned int iwl3945_fill_beacon_frame(struct iwl3945_priv *priv,
1404                                 struct ieee80211_hdr *hdr,
1405                                 const u8 *dest, int left)
1406 {
1407
1408         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1409             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
1410              (priv->iw_mode != NL80211_IFTYPE_AP)))
1411                 return 0;
1412
1413         if (priv->ibss_beacon->len > left)
1414                 return 0;
1415
1416         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1417
1418         return priv->ibss_beacon->len;
1419 }
1420
1421 static u8 iwl3945_rate_get_lowest_plcp(int rate_mask)
1422 {
1423         u8 i;
1424
1425         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1426              i = iwl3945_rates[i].next_ieee) {
1427                 if (rate_mask & (1 << i))
1428                         return iwl3945_rates[i].plcp;
1429         }
1430
1431         return IWL_RATE_INVALID;
1432 }
1433
1434 static int iwl3945_send_beacon_cmd(struct iwl3945_priv *priv)
1435 {
1436         struct iwl3945_frame *frame;
1437         unsigned int frame_size;
1438         int rc;
1439         u8 rate;
1440
1441         frame = iwl3945_get_free_frame(priv);
1442
1443         if (!frame) {
1444                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1445                           "command.\n");
1446                 return -ENOMEM;
1447         }
1448
1449         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1450                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic &
1451                                                 0xFF0);
1452                 if (rate == IWL_INVALID_RATE)
1453                         rate = IWL_RATE_6M_PLCP;
1454         } else {
1455                 rate = iwl3945_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1456                 if (rate == IWL_INVALID_RATE)
1457                         rate = IWL_RATE_1M_PLCP;
1458         }
1459
1460         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1461
1462         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1463                               &frame->u.cmd[0]);
1464
1465         iwl3945_free_frame(priv, frame);
1466
1467         return rc;
1468 }
1469
1470 /******************************************************************************
1471  *
1472  * EEPROM related functions
1473  *
1474  ******************************************************************************/
1475
1476 static void get_eeprom_mac(struct iwl3945_priv *priv, u8 *mac)
1477 {
1478         memcpy(mac, priv->eeprom.mac_address, 6);
1479 }
1480
1481 /*
1482  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1483  * embedded controller) as EEPROM reader; each read is a series of pulses
1484  * to/from the EEPROM chip, not a single event, so even reads could conflict
1485  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1486  * simply claims ownership, which should be safe when this function is called
1487  * (i.e. before loading uCode!).
1488  */
1489 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv)
1490 {
1491         _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1492         return 0;
1493 }
1494
1495 /**
1496  * iwl3945_eeprom_init - read EEPROM contents
1497  *
1498  * Load the EEPROM contents from adapter into priv->eeprom
1499  *
1500  * NOTE:  This routine uses the non-debug IO access functions.
1501  */
1502 int iwl3945_eeprom_init(struct iwl3945_priv *priv)
1503 {
1504         u16 *e = (u16 *)&priv->eeprom;
1505         u32 gp = iwl3945_read32(priv, CSR_EEPROM_GP);
1506         u32 r;
1507         int sz = sizeof(priv->eeprom);
1508         int rc;
1509         int i;
1510         u16 addr;
1511
1512         /* The EEPROM structure has several padding buffers within it
1513          * and when adding new EEPROM maps is subject to programmer errors
1514          * which may be very difficult to identify without explicitly
1515          * checking the resulting size of the eeprom map. */
1516         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1517
1518         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1519                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
1520                 return -ENOENT;
1521         }
1522
1523         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1524         rc = iwl3945_eeprom_acquire_semaphore(priv);
1525         if (rc < 0) {
1526                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1527                 return -ENOENT;
1528         }
1529
1530         /* eeprom is an array of 16bit values */
1531         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1532                 _iwl3945_write32(priv, CSR_EEPROM_REG, addr << 1);
1533                 _iwl3945_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1534
1535                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1536                                         i += IWL_EEPROM_ACCESS_DELAY) {
1537                         r = _iwl3945_read_direct32(priv, CSR_EEPROM_REG);
1538                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1539                                 break;
1540                         udelay(IWL_EEPROM_ACCESS_DELAY);
1541                 }
1542
1543                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1544                         IWL_ERROR("Time out reading EEPROM[%d]\n", addr);
1545                         return -ETIMEDOUT;
1546                 }
1547                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1548         }
1549
1550         return 0;
1551 }
1552
1553 static void iwl3945_unset_hw_setting(struct iwl3945_priv *priv)
1554 {
1555         if (priv->hw_setting.shared_virt)
1556                 pci_free_consistent(priv->pci_dev,
1557                                     sizeof(struct iwl3945_shared),
1558                                     priv->hw_setting.shared_virt,
1559                                     priv->hw_setting.shared_phys);
1560 }
1561
1562 /**
1563  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1564  *
1565  * return : set the bit for each supported rate insert in ie
1566  */
1567 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1568                                     u16 basic_rate, int *left)
1569 {
1570         u16 ret_rates = 0, bit;
1571         int i;
1572         u8 *cnt = ie;
1573         u8 *rates = ie + 1;
1574
1575         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1576                 if (bit & supported_rate) {
1577                         ret_rates |= bit;
1578                         rates[*cnt] = iwl3945_rates[i].ieee |
1579                                 ((bit & basic_rate) ? 0x80 : 0x00);
1580                         (*cnt)++;
1581                         (*left)--;
1582                         if ((*left <= 0) ||
1583                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1584                                 break;
1585                 }
1586         }
1587
1588         return ret_rates;
1589 }
1590
1591 /**
1592  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1593  */
1594 static u16 iwl3945_fill_probe_req(struct iwl3945_priv *priv,
1595                               struct ieee80211_mgmt *frame,
1596                               int left)
1597 {
1598         int len = 0;
1599         u8 *pos = NULL;
1600         u16 active_rates, ret_rates, cck_rates;
1601
1602         /* Make sure there is enough space for the probe request,
1603          * two mandatory IEs and the data */
1604         left -= 24;
1605         if (left < 0)
1606                 return 0;
1607         len += 24;
1608
1609         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1610         memcpy(frame->da, iwl3945_broadcast_addr, ETH_ALEN);
1611         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1612         memcpy(frame->bssid, iwl3945_broadcast_addr, ETH_ALEN);
1613         frame->seq_ctrl = 0;
1614
1615         /* fill in our indirect SSID IE */
1616         /* ...next IE... */
1617
1618         left -= 2;
1619         if (left < 0)
1620                 return 0;
1621         len += 2;
1622         pos = &(frame->u.probe_req.variable[0]);
1623         *pos++ = WLAN_EID_SSID;
1624         *pos++ = 0;
1625
1626         /* fill in supported rate */
1627         /* ...next IE... */
1628         left -= 2;
1629         if (left < 0)
1630                 return 0;
1631
1632         /* ... fill it in... */
1633         *pos++ = WLAN_EID_SUPP_RATES;
1634         *pos = 0;
1635
1636         priv->active_rate = priv->rates_mask;
1637         active_rates = priv->active_rate;
1638         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1639
1640         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1641         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1642                         priv->active_rate_basic, &left);
1643         active_rates &= ~ret_rates;
1644
1645         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1646                                  priv->active_rate_basic, &left);
1647         active_rates &= ~ret_rates;
1648
1649         len += 2 + *pos;
1650         pos += (*pos) + 1;
1651         if (active_rates == 0)
1652                 goto fill_end;
1653
1654         /* fill in supported extended rate */
1655         /* ...next IE... */
1656         left -= 2;
1657         if (left < 0)
1658                 return 0;
1659         /* ... fill it in... */
1660         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1661         *pos = 0;
1662         iwl3945_supported_rate_to_ie(pos, active_rates,
1663                                  priv->active_rate_basic, &left);
1664         if (*pos > 0)
1665                 len += 2 + *pos;
1666
1667  fill_end:
1668         return (u16)len;
1669 }
1670
1671 /*
1672  * QoS  support
1673 */
1674 static int iwl3945_send_qos_params_command(struct iwl3945_priv *priv,
1675                                        struct iwl3945_qosparam_cmd *qos)
1676 {
1677
1678         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1679                                 sizeof(struct iwl3945_qosparam_cmd), qos);
1680 }
1681
1682 static void iwl3945_reset_qos(struct iwl3945_priv *priv)
1683 {
1684         u16 cw_min = 15;
1685         u16 cw_max = 1023;
1686         u8 aifs = 2;
1687         u8 is_legacy = 0;
1688         unsigned long flags;
1689         int i;
1690
1691         spin_lock_irqsave(&priv->lock, flags);
1692         priv->qos_data.qos_active = 0;
1693
1694         if (priv->iw_mode == NL80211_IFTYPE_ADHOC) {
1695                 if (priv->qos_data.qos_enable)
1696                         priv->qos_data.qos_active = 1;
1697                 if (!(priv->active_rate & 0xfff0)) {
1698                         cw_min = 31;
1699                         is_legacy = 1;
1700                 }
1701         } else if (priv->iw_mode == NL80211_IFTYPE_AP) {
1702                 if (priv->qos_data.qos_enable)
1703                         priv->qos_data.qos_active = 1;
1704         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1705                 cw_min = 31;
1706                 is_legacy = 1;
1707         }
1708
1709         if (priv->qos_data.qos_active)
1710                 aifs = 3;
1711
1712         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1713         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1714         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1715         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1716         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1717
1718         if (priv->qos_data.qos_active) {
1719                 i = 1;
1720                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1721                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1722                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1723                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1724                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1725
1726                 i = 2;
1727                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1728                         cpu_to_le16((cw_min + 1) / 2 - 1);
1729                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1730                         cpu_to_le16(cw_max);
1731                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1732                 if (is_legacy)
1733                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1734                                 cpu_to_le16(6016);
1735                 else
1736                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1737                                 cpu_to_le16(3008);
1738                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1739
1740                 i = 3;
1741                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1742                         cpu_to_le16((cw_min + 1) / 4 - 1);
1743                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1744                         cpu_to_le16((cw_max + 1) / 2 - 1);
1745                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1746                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1747                 if (is_legacy)
1748                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1749                                 cpu_to_le16(3264);
1750                 else
1751                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1752                                 cpu_to_le16(1504);
1753         } else {
1754                 for (i = 1; i < 4; i++) {
1755                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1756                                 cpu_to_le16(cw_min);
1757                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1758                                 cpu_to_le16(cw_max);
1759                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1760                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1761                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1762                 }
1763         }
1764         IWL_DEBUG_QOS("set QoS to default \n");
1765
1766         spin_unlock_irqrestore(&priv->lock, flags);
1767 }
1768
1769 static void iwl3945_activate_qos(struct iwl3945_priv *priv, u8 force)
1770 {
1771         unsigned long flags;
1772
1773         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1774                 return;
1775
1776         if (!priv->qos_data.qos_enable)
1777                 return;
1778
1779         spin_lock_irqsave(&priv->lock, flags);
1780         priv->qos_data.def_qos_parm.qos_flags = 0;
1781
1782         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1783             !priv->qos_data.qos_cap.q_AP.txop_request)
1784                 priv->qos_data.def_qos_parm.qos_flags |=
1785                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1786
1787         if (priv->qos_data.qos_active)
1788                 priv->qos_data.def_qos_parm.qos_flags |=
1789                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1790
1791         spin_unlock_irqrestore(&priv->lock, flags);
1792
1793         if (force || iwl3945_is_associated(priv)) {
1794                 IWL_DEBUG_QOS("send QoS cmd with QoS active %d \n",
1795                               priv->qos_data.qos_active);
1796
1797                 iwl3945_send_qos_params_command(priv,
1798                                 &(priv->qos_data.def_qos_parm));
1799         }
1800 }
1801
1802 /*
1803  * Power management (not Tx power!) functions
1804  */
1805 #define MSEC_TO_USEC 1024
1806
1807 #define NOSLP __constant_cpu_to_le32(0)
1808 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK
1809 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1810 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1811                                      __constant_cpu_to_le32(X1), \
1812                                      __constant_cpu_to_le32(X2), \
1813                                      __constant_cpu_to_le32(X3), \
1814                                      __constant_cpu_to_le32(X4)}
1815
1816
1817 /* default power management (not Tx power) table values */
1818 /* for TIM  0-10 */
1819 static struct iwl3945_power_vec_entry range_0[IWL_POWER_AC] = {
1820         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1821         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1822         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1823         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1824         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1825         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1826 };
1827
1828 /* for TIM > 10 */
1829 static struct iwl3945_power_vec_entry range_1[IWL_POWER_AC] = {
1830         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1831         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1832                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1833         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1834                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1835         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1836                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1837         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1838         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1839                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1840 };
1841
1842 int iwl3945_power_init_handle(struct iwl3945_priv *priv)
1843 {
1844         int rc = 0, i;
1845         struct iwl3945_power_mgr *pow_data;
1846         int size = sizeof(struct iwl3945_power_vec_entry) * IWL_POWER_AC;
1847         u16 pci_pm;
1848
1849         IWL_DEBUG_POWER("Initialize power \n");
1850
1851         pow_data = &(priv->power_data);
1852
1853         memset(pow_data, 0, sizeof(*pow_data));
1854
1855         pow_data->active_index = IWL_POWER_RANGE_0;
1856         pow_data->dtim_val = 0xffff;
1857
1858         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1859         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1860
1861         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1862         if (rc != 0)
1863                 return 0;
1864         else {
1865                 struct iwl3945_powertable_cmd *cmd;
1866
1867                 IWL_DEBUG_POWER("adjust power command flags\n");
1868
1869                 for (i = 0; i < IWL_POWER_AC; i++) {
1870                         cmd = &pow_data->pwr_range_0[i].cmd;
1871
1872                         if (pci_pm & 0x1)
1873                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1874                         else
1875                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1876                 }
1877         }
1878         return rc;
1879 }
1880
1881 static int iwl3945_update_power_cmd(struct iwl3945_priv *priv,
1882                                 struct iwl3945_powertable_cmd *cmd, u32 mode)
1883 {
1884         int rc = 0, i;
1885         u8 skip;
1886         u32 max_sleep = 0;
1887         struct iwl3945_power_vec_entry *range;
1888         u8 period = 0;
1889         struct iwl3945_power_mgr *pow_data;
1890
1891         if (mode > IWL_POWER_INDEX_5) {
1892                 IWL_DEBUG_POWER("Error invalid power mode \n");
1893                 return -1;
1894         }
1895         pow_data = &(priv->power_data);
1896
1897         if (pow_data->active_index == IWL_POWER_RANGE_0)
1898                 range = &pow_data->pwr_range_0[0];
1899         else
1900                 range = &pow_data->pwr_range_1[1];
1901
1902         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
1903
1904 #ifdef IWL_MAC80211_DISABLE
1905         if (priv->assoc_network != NULL) {
1906                 unsigned long flags;
1907
1908                 period = priv->assoc_network->tim.tim_period;
1909         }
1910 #endif  /*IWL_MAC80211_DISABLE */
1911         skip = range[mode].no_dtim;
1912
1913         if (period == 0) {
1914                 period = 1;
1915                 skip = 0;
1916         }
1917
1918         if (skip == 0) {
1919                 max_sleep = period;
1920                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1921         } else {
1922                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1923                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1924                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1925         }
1926
1927         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1928                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1929                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1930         }
1931
1932         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1933         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1934         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1935         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1936                         le32_to_cpu(cmd->sleep_interval[0]),
1937                         le32_to_cpu(cmd->sleep_interval[1]),
1938                         le32_to_cpu(cmd->sleep_interval[2]),
1939                         le32_to_cpu(cmd->sleep_interval[3]),
1940                         le32_to_cpu(cmd->sleep_interval[4]));
1941
1942         return rc;
1943 }
1944
1945 static int iwl3945_send_power_mode(struct iwl3945_priv *priv, u32 mode)
1946 {
1947         u32 uninitialized_var(final_mode);
1948         int rc;
1949         struct iwl3945_powertable_cmd cmd;
1950
1951         /* If on battery, set to 3,
1952          * if plugged into AC power, set to CAM ("continuously aware mode"),
1953          * else user level */
1954         switch (mode) {
1955         case IWL_POWER_BATTERY:
1956                 final_mode = IWL_POWER_INDEX_3;
1957                 break;
1958         case IWL_POWER_AC:
1959                 final_mode = IWL_POWER_MODE_CAM;
1960                 break;
1961         default:
1962                 final_mode = mode;
1963                 break;
1964         }
1965
1966         iwl3945_update_power_cmd(priv, &cmd, final_mode);
1967
1968         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1969
1970         if (final_mode == IWL_POWER_MODE_CAM)
1971                 clear_bit(STATUS_POWER_PMI, &priv->status);
1972         else
1973                 set_bit(STATUS_POWER_PMI, &priv->status);
1974
1975         return rc;
1976 }
1977
1978 /**
1979  * iwl3945_scan_cancel - Cancel any currently executing HW scan
1980  *
1981  * NOTE: priv->mutex is not required before calling this function
1982  */
1983 static int iwl3945_scan_cancel(struct iwl3945_priv *priv)
1984 {
1985         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1986                 clear_bit(STATUS_SCANNING, &priv->status);
1987                 return 0;
1988         }
1989
1990         if (test_bit(STATUS_SCANNING, &priv->status)) {
1991                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1992                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1993                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1994                         queue_work(priv->workqueue, &priv->abort_scan);
1995
1996                 } else
1997                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1998
1999                 return test_bit(STATUS_SCANNING, &priv->status);
2000         }
2001
2002         return 0;
2003 }
2004
2005 /**
2006  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
2007  * @ms: amount of time to wait (in milliseconds) for scan to abort
2008  *
2009  * NOTE: priv->mutex must be held before calling this function
2010  */
2011 static int iwl3945_scan_cancel_timeout(struct iwl3945_priv *priv, unsigned long ms)
2012 {
2013         unsigned long now = jiffies;
2014         int ret;
2015
2016         ret = iwl3945_scan_cancel(priv);
2017         if (ret && ms) {
2018                 mutex_unlock(&priv->mutex);
2019                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2020                                 test_bit(STATUS_SCANNING, &priv->status))
2021                         msleep(1);
2022                 mutex_lock(&priv->mutex);
2023
2024                 return test_bit(STATUS_SCANNING, &priv->status);
2025         }
2026
2027         return ret;
2028 }
2029
2030 #define MAX_UCODE_BEACON_INTERVAL       1024
2031 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2032
2033 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
2034 {
2035         u16 new_val = 0;
2036         u16 beacon_factor = 0;
2037
2038         beacon_factor =
2039             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2040                 / MAX_UCODE_BEACON_INTERVAL;
2041         new_val = beacon_val / beacon_factor;
2042
2043         return cpu_to_le16(new_val);
2044 }
2045
2046 static void iwl3945_setup_rxon_timing(struct iwl3945_priv *priv)
2047 {
2048         u64 interval_tm_unit;
2049         u64 tsf, result;
2050         unsigned long flags;
2051         struct ieee80211_conf *conf = NULL;
2052         u16 beacon_int = 0;
2053
2054         conf = ieee80211_get_hw_conf(priv->hw);
2055
2056         spin_lock_irqsave(&priv->lock, flags);
2057         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2058         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2059
2060         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2061
2062         tsf = priv->timestamp1;
2063         tsf = ((tsf << 32) | priv->timestamp0);
2064
2065         beacon_int = priv->beacon_int;
2066         spin_unlock_irqrestore(&priv->lock, flags);
2067
2068         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
2069                 if (beacon_int == 0) {
2070                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2071                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2072                 } else {
2073                         priv->rxon_timing.beacon_interval =
2074                                 cpu_to_le16(beacon_int);
2075                         priv->rxon_timing.beacon_interval =
2076                             iwl3945_adjust_beacon_interval(
2077                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2078                 }
2079
2080                 priv->rxon_timing.atim_window = 0;
2081         } else {
2082                 priv->rxon_timing.beacon_interval =
2083                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2084                 /* TODO: we need to get atim_window from upper stack
2085                  * for now we set to 0 */
2086                 priv->rxon_timing.atim_window = 0;
2087         }
2088
2089         interval_tm_unit =
2090                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2091         result = do_div(tsf, interval_tm_unit);
2092         priv->rxon_timing.beacon_init_val =
2093             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2094
2095         IWL_DEBUG_ASSOC
2096             ("beacon interval %d beacon timer %d beacon tim %d\n",
2097                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2098                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2099                 le16_to_cpu(priv->rxon_timing.atim_window));
2100 }
2101
2102 static int iwl3945_scan_initiate(struct iwl3945_priv *priv)
2103 {
2104         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2105                 IWL_ERROR("APs don't scan.\n");
2106                 return 0;
2107         }
2108
2109         if (!iwl3945_is_ready_rf(priv)) {
2110                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2111                 return -EIO;
2112         }
2113
2114         if (test_bit(STATUS_SCANNING, &priv->status)) {
2115                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2116                 return -EAGAIN;
2117         }
2118
2119         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2120                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2121                                "Queuing.\n");
2122                 return -EAGAIN;
2123         }
2124
2125         IWL_DEBUG_INFO("Starting scan...\n");
2126         if (priv->cfg->sku & IWL_SKU_G)
2127                 priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
2128         if (priv->cfg->sku & IWL_SKU_A)
2129                 priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
2130         set_bit(STATUS_SCANNING, &priv->status);
2131         priv->scan_start = jiffies;
2132         priv->scan_pass_start = priv->scan_start;
2133
2134         queue_work(priv->workqueue, &priv->request_scan);
2135
2136         return 0;
2137 }
2138
2139 static int iwl3945_set_rxon_hwcrypto(struct iwl3945_priv *priv, int hw_decrypt)
2140 {
2141         struct iwl3945_rxon_cmd *rxon = &priv->staging_rxon;
2142
2143         if (hw_decrypt)
2144                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2145         else
2146                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2147
2148         return 0;
2149 }
2150
2151 static void iwl3945_set_flags_for_phymode(struct iwl3945_priv *priv,
2152                                           enum ieee80211_band band)
2153 {
2154         if (band == IEEE80211_BAND_5GHZ) {
2155                 priv->staging_rxon.flags &=
2156                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2157                       | RXON_FLG_CCK_MSK);
2158                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2159         } else {
2160                 /* Copied from iwl3945_bg_post_associate() */
2161                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2162                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2163                 else
2164                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2165
2166                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2167                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2168
2169                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2170                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2171                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2172         }
2173 }
2174
2175 /*
2176  * initialize rxon structure with default values from eeprom
2177  */
2178 static void iwl3945_connection_init_rx_config(struct iwl3945_priv *priv,
2179                                               int mode)
2180 {
2181         const struct iwl3945_channel_info *ch_info;
2182
2183         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2184
2185         switch (mode) {
2186         case NL80211_IFTYPE_AP:
2187                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2188                 break;
2189
2190         case NL80211_IFTYPE_STATION:
2191                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2192                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2193                 break;
2194
2195         case NL80211_IFTYPE_ADHOC:
2196                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2197                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2198                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2199                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2200                 break;
2201
2202         case NL80211_IFTYPE_MONITOR:
2203                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2204                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2205                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2206                 break;
2207         default:
2208                 IWL_ERROR("Unsupported interface type %d\n", mode);
2209                 break;
2210         }
2211
2212 #if 0
2213         /* TODO:  Figure out when short_preamble would be set and cache from
2214          * that */
2215         if (!hw_to_local(priv->hw)->short_preamble)
2216                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2217         else
2218                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2219 #endif
2220
2221         ch_info = iwl3945_get_channel_info(priv, priv->band,
2222                                        le16_to_cpu(priv->active_rxon.channel));
2223
2224         if (!ch_info)
2225                 ch_info = &priv->channel_info[0];
2226
2227         /*
2228          * in some case A channels are all non IBSS
2229          * in this case force B/G channel
2230          */
2231         if ((mode == NL80211_IFTYPE_ADHOC) && !(is_channel_ibss(ch_info)))
2232                 ch_info = &priv->channel_info[0];
2233
2234         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2235         if (is_channel_a_band(ch_info))
2236                 priv->band = IEEE80211_BAND_5GHZ;
2237         else
2238                 priv->band = IEEE80211_BAND_2GHZ;
2239
2240         iwl3945_set_flags_for_phymode(priv, priv->band);
2241
2242         priv->staging_rxon.ofdm_basic_rates =
2243             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2244         priv->staging_rxon.cck_basic_rates =
2245             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2246 }
2247
2248 static int iwl3945_set_mode(struct iwl3945_priv *priv, int mode)
2249 {
2250         if (mode == NL80211_IFTYPE_ADHOC) {
2251                 const struct iwl3945_channel_info *ch_info;
2252
2253                 ch_info = iwl3945_get_channel_info(priv,
2254                         priv->band,
2255                         le16_to_cpu(priv->staging_rxon.channel));
2256
2257                 if (!ch_info || !is_channel_ibss(ch_info)) {
2258                         IWL_ERROR("channel %d not IBSS channel\n",
2259                                   le16_to_cpu(priv->staging_rxon.channel));
2260                         return -EINVAL;
2261                 }
2262         }
2263
2264         iwl3945_connection_init_rx_config(priv, mode);
2265         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2266
2267         iwl3945_clear_stations_table(priv);
2268
2269         /* don't commit rxon if rf-kill is on*/
2270         if (!iwl3945_is_ready_rf(priv))
2271                 return -EAGAIN;
2272
2273         cancel_delayed_work(&priv->scan_check);
2274         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2275                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2276                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2277                 return -EAGAIN;
2278         }
2279
2280         iwl3945_commit_rxon(priv);
2281
2282         return 0;
2283 }
2284
2285 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl3945_priv *priv,
2286                                       struct ieee80211_tx_info *info,
2287                                       struct iwl3945_cmd *cmd,
2288                                       struct sk_buff *skb_frag,
2289                                       int last_frag)
2290 {
2291         struct iwl3945_hw_key *keyinfo =
2292             &priv->stations[info->control.hw_key->hw_key_idx].keyinfo;
2293
2294         switch (keyinfo->alg) {
2295         case ALG_CCMP:
2296                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2297                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2298                 IWL_DEBUG_TX("tx_cmd with AES hwcrypto\n");
2299                 break;
2300
2301         case ALG_TKIP:
2302 #if 0
2303                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2304
2305                 if (last_frag)
2306                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2307                                8);
2308                 else
2309                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2310 #endif
2311                 break;
2312
2313         case ALG_WEP:
2314                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2315                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2316
2317                 if (keyinfo->keylen == 13)
2318                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2319
2320                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2321
2322                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2323                              "with key %d\n", info->control.hw_key->hw_key_idx);
2324                 break;
2325
2326         default:
2327                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2328                 break;
2329         }
2330 }
2331
2332 /*
2333  * handle build REPLY_TX command notification.
2334  */
2335 static void iwl3945_build_tx_cmd_basic(struct iwl3945_priv *priv,
2336                                   struct iwl3945_cmd *cmd,
2337                                   struct ieee80211_tx_info *info,
2338                                   struct ieee80211_hdr *hdr,
2339                                   int is_unicast, u8 std_id)
2340 {
2341         __le16 fc = hdr->frame_control;
2342         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2343         u8 rc_flags = info->control.rates[0].flags;
2344
2345         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2346         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
2347                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2348                 if (ieee80211_is_mgmt(fc))
2349                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2350                 if (ieee80211_is_probe_resp(fc) &&
2351                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2352                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2353         } else {
2354                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2355                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2356         }
2357
2358         cmd->cmd.tx.sta_id = std_id;
2359         if (ieee80211_has_morefrags(fc))
2360                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2361
2362         if (ieee80211_is_data_qos(fc)) {
2363                 u8 *qc = ieee80211_get_qos_ctl(hdr);
2364                 cmd->cmd.tx.tid_tspec = qc[0] & 0xf;
2365                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2366         } else {
2367                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2368         }
2369
2370         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2371                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2372                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2373         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
2374                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2375                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2376         }
2377
2378         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2379                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2380
2381         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2382         if (ieee80211_is_mgmt(fc)) {
2383                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
2384                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2385                 else
2386                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2387         } else {
2388                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2389 #ifdef CONFIG_IWL3945_LEDS
2390                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2391 #endif
2392         }
2393
2394         cmd->cmd.tx.driver_txop = 0;
2395         cmd->cmd.tx.tx_flags = tx_flags;
2396         cmd->cmd.tx.next_frame_len = 0;
2397 }
2398
2399 /**
2400  * iwl3945_get_sta_id - Find station's index within station table
2401  */
2402 static int iwl3945_get_sta_id(struct iwl3945_priv *priv, struct ieee80211_hdr *hdr)
2403 {
2404         int sta_id;
2405         u16 fc = le16_to_cpu(hdr->frame_control);
2406
2407         /* If this frame is broadcast or management, use broadcast station id */
2408         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2409             is_multicast_ether_addr(hdr->addr1))
2410                 return priv->hw_setting.bcast_sta_id;
2411
2412         switch (priv->iw_mode) {
2413
2414         /* If we are a client station in a BSS network, use the special
2415          * AP station entry (that's the only station we communicate with) */
2416         case NL80211_IFTYPE_STATION:
2417                 return IWL_AP_ID;
2418
2419         /* If we are an AP, then find the station, or use BCAST */
2420         case NL80211_IFTYPE_AP:
2421                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2422                 if (sta_id != IWL_INVALID_STATION)
2423                         return sta_id;
2424                 return priv->hw_setting.bcast_sta_id;
2425
2426         /* If this frame is going out to an IBSS network, find the station,
2427          * or create a new station table entry */
2428         case NL80211_IFTYPE_ADHOC: {
2429                 /* Create new station table entry */
2430                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2431                 if (sta_id != IWL_INVALID_STATION)
2432                         return sta_id;
2433
2434                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2435
2436                 if (sta_id != IWL_INVALID_STATION)
2437                         return sta_id;
2438
2439                 IWL_DEBUG_DROP("Station %pM not in station map. "
2440                                "Defaulting to broadcast...\n",
2441                                hdr->addr1);
2442                 iwl3945_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2443                 return priv->hw_setting.bcast_sta_id;
2444         }
2445         /* If we are in monitor mode, use BCAST. This is required for
2446          * packet injection. */
2447         case NL80211_IFTYPE_MONITOR:
2448                 return priv->hw_setting.bcast_sta_id;
2449
2450         default:
2451                 IWL_WARNING("Unknown mode of operation: %d\n", priv->iw_mode);
2452                 return priv->hw_setting.bcast_sta_id;
2453         }
2454 }
2455
2456 /*
2457  * start REPLY_TX command process
2458  */
2459 static int iwl3945_tx_skb(struct iwl3945_priv *priv, struct sk_buff *skb)
2460 {
2461         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2462         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2463         struct iwl3945_tfd_frame *tfd;
2464         u32 *control_flags;
2465         int txq_id = skb_get_queue_mapping(skb);
2466         struct iwl3945_tx_queue *txq = NULL;
2467         struct iwl3945_queue *q = NULL;
2468         dma_addr_t phys_addr;
2469         dma_addr_t txcmd_phys;
2470         struct iwl3945_cmd *out_cmd = NULL;
2471         u16 len, idx, len_org, hdr_len;
2472         u8 id;
2473         u8 unicast;
2474         u8 sta_id;
2475         u8 tid = 0;
2476         u16 seq_number = 0;
2477         __le16 fc;
2478         u8 wait_write_ptr = 0;
2479         u8 *qc = NULL;
2480         unsigned long flags;
2481         int rc;
2482
2483         spin_lock_irqsave(&priv->lock, flags);
2484         if (iwl3945_is_rfkill(priv)) {
2485                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2486                 goto drop_unlock;
2487         }
2488
2489         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
2490                 IWL_ERROR("ERROR: No TX rate available.\n");
2491                 goto drop_unlock;
2492         }
2493
2494         unicast = !is_multicast_ether_addr(hdr->addr1);
2495         id = 0;
2496
2497         fc = hdr->frame_control;
2498
2499 #ifdef CONFIG_IWL3945_DEBUG
2500         if (ieee80211_is_auth(fc))
2501                 IWL_DEBUG_TX("Sending AUTH frame\n");
2502         else if (ieee80211_is_assoc_req(fc))
2503                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2504         else if (ieee80211_is_reassoc_req(fc))
2505                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2506 #endif
2507
2508         /* drop all data frame if we are not associated */
2509         if (ieee80211_is_data(fc) &&
2510             (priv->iw_mode != NL80211_IFTYPE_MONITOR) && /* packet injection */
2511             (!iwl3945_is_associated(priv) ||
2512              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
2513                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2514                 goto drop_unlock;
2515         }
2516
2517         spin_unlock_irqrestore(&priv->lock, flags);
2518
2519         hdr_len = ieee80211_hdrlen(fc);
2520
2521         /* Find (or create) index into station table for destination station */
2522         sta_id = iwl3945_get_sta_id(priv, hdr);
2523         if (sta_id == IWL_INVALID_STATION) {
2524                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %pM\n",
2525                                hdr->addr1);
2526                 goto drop;
2527         }
2528
2529         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2530
2531         if (ieee80211_is_data_qos(fc)) {
2532                 qc = ieee80211_get_qos_ctl(hdr);
2533                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
2534                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2535                                 IEEE80211_SCTL_SEQ;
2536                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2537                         (hdr->seq_ctrl &
2538                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2539                 seq_number += 0x10;
2540         }
2541
2542         /* Descriptor for chosen Tx queue */
2543         txq = &priv->txq[txq_id];
2544         q = &txq->q;
2545
2546         spin_lock_irqsave(&priv->lock, flags);
2547
2548         /* Set up first empty TFD within this queue's circular TFD buffer */
2549         tfd = &txq->bd[q->write_ptr];
2550         memset(tfd, 0, sizeof(*tfd));
2551         control_flags = (u32 *) tfd;
2552         idx = get_cmd_index(q, q->write_ptr, 0);
2553
2554         /* Set up driver data for this TFD */
2555         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2556         txq->txb[q->write_ptr].skb[0] = skb;
2557
2558         /* Init first empty entry in queue's array of Tx/cmd buffers */
2559         out_cmd = &txq->cmd[idx];
2560         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2561         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2562
2563         /*
2564          * Set up the Tx-command (not MAC!) header.
2565          * Store the chosen Tx queue and TFD index within the sequence field;
2566          * after Tx, uCode's Tx response will return this value so driver can
2567          * locate the frame within the tx queue and do post-tx processing.
2568          */
2569         out_cmd->hdr.cmd = REPLY_TX;
2570         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2571                                 INDEX_TO_SEQ(q->write_ptr)));
2572
2573         /* Copy MAC header from skb into command buffer */
2574         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2575
2576         /*
2577          * Use the first empty entry in this queue's command buffer array
2578          * to contain the Tx command and MAC header concatenated together
2579          * (payload data will be in another buffer).
2580          * Size of this varies, due to varying MAC header length.
2581          * If end is not dword aligned, we'll have 2 extra bytes at the end
2582          * of the MAC header (device reads on dword boundaries).
2583          * We'll tell device about this padding later.
2584          */
2585         len = priv->hw_setting.tx_cmd_len +
2586                 sizeof(struct iwl3945_cmd_header) + hdr_len;
2587
2588         len_org = len;
2589         len = (len + 3) & ~3;
2590
2591         if (len_org != len)
2592                 len_org = 1;
2593         else
2594                 len_org = 0;
2595
2596         /* Physical address of this Tx command's header (not MAC header!),
2597          * within command buffer array. */
2598         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2599                      offsetof(struct iwl3945_cmd, hdr);
2600
2601         /* Add buffer containing Tx command and MAC(!) header to TFD's
2602          * first entry */
2603         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2604
2605         if (info->control.hw_key)
2606                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
2607
2608         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2609          * if any (802.11 null frames have no payload). */
2610         len = skb->len - hdr_len;
2611         if (len) {
2612                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2613                                            len, PCI_DMA_TODEVICE);
2614                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2615         }
2616
2617         if (!len)
2618                 /* If there is no payload, then we use only one Tx buffer */
2619                 *control_flags = TFD_CTL_COUNT_SET(1);
2620         else
2621                 /* Else use 2 buffers.
2622                  * Tell 3945 about any padding after MAC header */
2623                 *control_flags = TFD_CTL_COUNT_SET(2) |
2624                         TFD_CTL_PAD_SET(U32_PAD(len));
2625
2626         /* Total # bytes to be transmitted */
2627         len = (u16)skb->len;
2628         out_cmd->cmd.tx.len = cpu_to_le16(len);
2629
2630         /* TODO need this for burst mode later on */
2631         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, unicast, sta_id);
2632
2633         /* set is_hcca to 0; it probably will never be implemented */
2634         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
2635
2636         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2637         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2638
2639         if (!ieee80211_has_morefrags(hdr->frame_control)) {
2640                 txq->need_update = 1;
2641                 if (qc)
2642                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2643         } else {
2644                 wait_write_ptr = 1;
2645                 txq->need_update = 0;
2646         }
2647
2648         iwl3945_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2649                            sizeof(out_cmd->cmd.tx));
2650
2651         iwl3945_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2652                            ieee80211_hdrlen(fc));
2653
2654         /* Tell device the write index *just past* this latest filled TFD */
2655         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2656         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2657         spin_unlock_irqrestore(&priv->lock, flags);
2658
2659         if (rc)
2660                 return rc;
2661
2662         if ((iwl3945_queue_space(q) < q->high_mark)
2663             && priv->mac80211_registered) {
2664                 if (wait_write_ptr) {
2665                         spin_lock_irqsave(&priv->lock, flags);
2666                         txq->need_update = 1;
2667                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2668                         spin_unlock_irqrestore(&priv->lock, flags);
2669                 }
2670
2671                 ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
2672         }
2673
2674         return 0;
2675
2676 drop_unlock:
2677         spin_unlock_irqrestore(&priv->lock, flags);
2678 drop:
2679         return -1;
2680 }
2681
2682 static void iwl3945_set_rate(struct iwl3945_priv *priv)
2683 {
2684         const struct ieee80211_supported_band *sband = NULL;
2685         struct ieee80211_rate *rate;
2686         int i;
2687
2688         sband = iwl3945_get_band(priv, priv->band);
2689         if (!sband) {
2690                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2691                 return;
2692         }
2693
2694         priv->active_rate = 0;
2695         priv->active_rate_basic = 0;
2696
2697         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2698                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2699
2700         for (i = 0; i < sband->n_bitrates; i++) {
2701                 rate = &sband->bitrates[i];
2702                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2703                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2704                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2705                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2706                         priv->active_rate |= (1 << rate->hw_value);
2707                 }
2708         }
2709
2710         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2711                        priv->active_rate, priv->active_rate_basic);
2712
2713         /*
2714          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2715          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2716          * OFDM
2717          */
2718         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2719                 priv->staging_rxon.cck_basic_rates =
2720                     ((priv->active_rate_basic &
2721                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2722         else
2723                 priv->staging_rxon.cck_basic_rates =
2724                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2725
2726         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2727                 priv->staging_rxon.ofdm_basic_rates =
2728                     ((priv->active_rate_basic &
2729                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2730                       IWL_FIRST_OFDM_RATE) & 0xFF;
2731         else
2732                 priv->staging_rxon.ofdm_basic_rates =
2733                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2734 }
2735
2736 static void iwl3945_radio_kill_sw(struct iwl3945_priv *priv, int disable_radio)
2737 {
2738         unsigned long flags;
2739
2740         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2741                 return;
2742
2743         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2744                           disable_radio ? "OFF" : "ON");
2745
2746         if (disable_radio) {
2747                 iwl3945_scan_cancel(priv);
2748                 /* FIXME: This is a workaround for AP */
2749                 if (priv->iw_mode != NL80211_IFTYPE_AP) {
2750                         spin_lock_irqsave(&priv->lock, flags);
2751                         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
2752                                     CSR_UCODE_SW_BIT_RFKILL);
2753                         spin_unlock_irqrestore(&priv->lock, flags);
2754                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2755                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2756                 }
2757                 return;
2758         }
2759
2760         spin_lock_irqsave(&priv->lock, flags);
2761         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2762
2763         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2764         spin_unlock_irqrestore(&priv->lock, flags);
2765
2766         /* wake up ucode */
2767         msleep(10);
2768
2769         spin_lock_irqsave(&priv->lock, flags);
2770         iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
2771         if (!iwl3945_grab_nic_access(priv))
2772                 iwl3945_release_nic_access(priv);
2773         spin_unlock_irqrestore(&priv->lock, flags);
2774
2775         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2776                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2777                                   "disabled by HW switch\n");
2778                 return;
2779         }
2780
2781         if (priv->is_open)
2782                 queue_work(priv->workqueue, &priv->restart);
2783         return;
2784 }
2785
2786 void iwl3945_set_decrypted_flag(struct iwl3945_priv *priv, struct sk_buff *skb,
2787                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2788 {
2789         u16 fc =
2790             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2791
2792         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2793                 return;
2794
2795         if (!(fc & IEEE80211_FCTL_PROTECTED))
2796                 return;
2797
2798         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2799         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2800         case RX_RES_STATUS_SEC_TYPE_TKIP:
2801                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2802                     RX_RES_STATUS_BAD_ICV_MIC)
2803                         stats->flag |= RX_FLAG_MMIC_ERROR;
2804         case RX_RES_STATUS_SEC_TYPE_WEP:
2805         case RX_RES_STATUS_SEC_TYPE_CCMP:
2806                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2807                     RX_RES_STATUS_DECRYPT_OK) {
2808                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2809                         stats->flag |= RX_FLAG_DECRYPTED;
2810                 }
2811                 break;
2812
2813         default:
2814                 break;
2815         }
2816 }
2817
2818 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2819
2820 #include "iwl-spectrum.h"
2821
2822 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2823 #define BEACON_TIME_MASK_HIGH   0xFF000000
2824 #define TIME_UNIT               1024
2825
2826 /*
2827  * extended beacon time format
2828  * time in usec will be changed into a 32-bit value in 8:24 format
2829  * the high 1 byte is the beacon counts
2830  * the lower 3 bytes is the time in usec within one beacon interval
2831  */
2832
2833 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
2834 {
2835         u32 quot;
2836         u32 rem;
2837         u32 interval = beacon_interval * 1024;
2838
2839         if (!interval || !usec)
2840                 return 0;
2841
2842         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2843         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2844
2845         return (quot << 24) + rem;
2846 }
2847
2848 /* base is usually what we get from ucode with each received frame,
2849  * the same as HW timer counter counting down
2850  */
2851
2852 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2853 {
2854         u32 base_low = base & BEACON_TIME_MASK_LOW;
2855         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2856         u32 interval = beacon_interval * TIME_UNIT;
2857         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2858             (addon & BEACON_TIME_MASK_HIGH);
2859
2860         if (base_low > addon_low)
2861                 res += base_low - addon_low;
2862         else if (base_low < addon_low) {
2863                 res += interval + base_low - addon_low;
2864                 res += (1 << 24);
2865         } else
2866                 res += (1 << 24);
2867
2868         return cpu_to_le32(res);
2869 }
2870
2871 static int iwl3945_get_measurement(struct iwl3945_priv *priv,
2872                                struct ieee80211_measurement_params *params,
2873                                u8 type)
2874 {
2875         struct iwl3945_spectrum_cmd spectrum;
2876         struct iwl3945_rx_packet *res;
2877         struct iwl3945_host_cmd cmd = {
2878                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2879                 .data = (void *)&spectrum,
2880                 .meta.flags = CMD_WANT_SKB,
2881         };
2882         u32 add_time = le64_to_cpu(params->start_time);
2883         int rc;
2884         int spectrum_resp_status;
2885         int duration = le16_to_cpu(params->duration);
2886
2887         if (iwl3945_is_associated(priv))
2888                 add_time =
2889                     iwl3945_usecs_to_beacons(
2890                         le64_to_cpu(params->start_time) - priv->last_tsf,
2891                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2892
2893         memset(&spectrum, 0, sizeof(spectrum));
2894
2895         spectrum.channel_count = cpu_to_le16(1);
2896         spectrum.flags =
2897             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2898         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2899         cmd.len = sizeof(spectrum);
2900         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2901
2902         if (iwl3945_is_associated(priv))
2903                 spectrum.start_time =
2904                     iwl3945_add_beacon_time(priv->last_beacon_time,
2905                                 add_time,
2906                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2907         else
2908                 spectrum.start_time = 0;
2909
2910         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2911         spectrum.channels[0].channel = params->channel;
2912         spectrum.channels[0].type = type;
2913         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2914                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2915                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2916
2917         rc = iwl3945_send_cmd_sync(priv, &cmd);
2918         if (rc)
2919                 return rc;
2920
2921         res = (struct iwl3945_rx_packet *)cmd.meta.u.skb->data;
2922         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2923                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2924                 rc = -EIO;
2925         }
2926
2927         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2928         switch (spectrum_resp_status) {
2929         case 0:         /* Command will be handled */
2930                 if (res->u.spectrum.id != 0xff) {
2931                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
2932                                                 res->u.spectrum.id);
2933                         priv->measurement_status &= ~MEASUREMENT_READY;
2934                 }
2935                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2936                 rc = 0;
2937                 break;
2938
2939         case 1:         /* Command will not be handled */
2940                 rc = -EAGAIN;
2941                 break;
2942         }
2943
2944         dev_kfree_skb_any(cmd.meta.u.skb);
2945
2946         return rc;
2947 }
2948 #endif
2949
2950 static void iwl3945_rx_reply_alive(struct iwl3945_priv *priv,
2951                                struct iwl3945_rx_mem_buffer *rxb)
2952 {
2953         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
2954         struct iwl3945_alive_resp *palive;
2955         struct delayed_work *pwork;
2956
2957         palive = &pkt->u.alive_frame;
2958
2959         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2960                        "0x%01X 0x%01X\n",
2961                        palive->is_valid, palive->ver_type,
2962                        palive->ver_subtype);
2963
2964         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2965                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2966                 memcpy(&priv->card_alive_init,
2967                        &pkt->u.alive_frame,
2968                        sizeof(struct iwl3945_init_alive_resp));
2969                 pwork = &priv->init_alive_start;
2970         } else {
2971                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2972                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2973                        sizeof(struct iwl3945_alive_resp));
2974                 pwork = &priv->alive_start;
2975                 iwl3945_disable_events(priv);
2976         }
2977
2978         /* We delay the ALIVE response by 5ms to
2979          * give the HW RF Kill time to activate... */
2980         if (palive->is_valid == UCODE_VALID_OK)
2981                 queue_delayed_work(priv->workqueue, pwork,
2982                                    msecs_to_jiffies(5));
2983         else
2984                 IWL_WARNING("uCode did not respond OK.\n");
2985 }
2986
2987 static void iwl3945_rx_reply_add_sta(struct iwl3945_priv *priv,
2988                                  struct iwl3945_rx_mem_buffer *rxb)
2989 {
2990         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
2991
2992         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2993         return;
2994 }
2995
2996 static void iwl3945_rx_reply_error(struct iwl3945_priv *priv,
2997                                struct iwl3945_rx_mem_buffer *rxb)
2998 {
2999         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3000
3001         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3002                 "seq 0x%04X ser 0x%08X\n",
3003                 le32_to_cpu(pkt->u.err_resp.error_type),
3004                 get_cmd_string(pkt->u.err_resp.cmd_id),
3005                 pkt->u.err_resp.cmd_id,
3006                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3007                 le32_to_cpu(pkt->u.err_resp.error_info));
3008 }
3009
3010 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3011
3012 static void iwl3945_rx_csa(struct iwl3945_priv *priv, struct iwl3945_rx_mem_buffer *rxb)
3013 {
3014         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3015         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active_rxon;
3016         struct iwl3945_csa_notification *csa = &(pkt->u.csa_notif);
3017         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3018                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3019         rxon->channel = csa->channel;
3020         priv->staging_rxon.channel = csa->channel;
3021 }
3022
3023 static void iwl3945_rx_spectrum_measure_notif(struct iwl3945_priv *priv,
3024                                           struct iwl3945_rx_mem_buffer *rxb)
3025 {
3026 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3027         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3028         struct iwl3945_spectrum_notification *report = &(pkt->u.spectrum_notif);
3029
3030         if (!report->state) {
3031                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3032                           "Spectrum Measure Notification: Start\n");
3033                 return;
3034         }
3035
3036         memcpy(&priv->measure_report, report, sizeof(*report));
3037         priv->measurement_status |= MEASUREMENT_READY;
3038 #endif
3039 }
3040
3041 static void iwl3945_rx_pm_sleep_notif(struct iwl3945_priv *priv,
3042                                   struct iwl3945_rx_mem_buffer *rxb)
3043 {
3044 #ifdef CONFIG_IWL3945_DEBUG
3045         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3046         struct iwl3945_sleep_notification *sleep = &(pkt->u.sleep_notif);
3047         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3048                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3049 #endif
3050 }
3051
3052 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl3945_priv *priv,
3053                                              struct iwl3945_rx_mem_buffer *rxb)
3054 {
3055         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3056         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3057                         "notification for %s:\n",
3058                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3059         iwl3945_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3060 }
3061
3062 static void iwl3945_bg_beacon_update(struct work_struct *work)
3063 {
3064         struct iwl3945_priv *priv =
3065                 container_of(work, struct iwl3945_priv, beacon_update);
3066         struct sk_buff *beacon;
3067
3068         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3069         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
3070
3071         if (!beacon) {
3072                 IWL_ERROR("update beacon failed\n");
3073                 return;
3074         }
3075
3076         mutex_lock(&priv->mutex);
3077         /* new beacon skb is allocated every time; dispose previous.*/
3078         if (priv->ibss_beacon)
3079                 dev_kfree_skb(priv->ibss_beacon);
3080
3081         priv->ibss_beacon = beacon;
3082         mutex_unlock(&priv->mutex);
3083
3084         iwl3945_send_beacon_cmd(priv);
3085 }
3086
3087 static void iwl3945_rx_beacon_notif(struct iwl3945_priv *priv,
3088                                 struct iwl3945_rx_mem_buffer *rxb)
3089 {
3090 #ifdef CONFIG_IWL3945_DEBUG
3091         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3092         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3093         u8 rate = beacon->beacon_notify_hdr.rate;
3094
3095         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3096                 "tsf %d %d rate %d\n",
3097                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3098                 beacon->beacon_notify_hdr.failure_frame,
3099                 le32_to_cpu(beacon->ibss_mgr_status),
3100                 le32_to_cpu(beacon->high_tsf),
3101                 le32_to_cpu(beacon->low_tsf), rate);
3102 #endif
3103
3104         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
3105             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3106                 queue_work(priv->workqueue, &priv->beacon_update);
3107 }
3108
3109 /* Service response to REPLY_SCAN_CMD (0x80) */
3110 static void iwl3945_rx_reply_scan(struct iwl3945_priv *priv,
3111                               struct iwl3945_rx_mem_buffer *rxb)
3112 {
3113 #ifdef CONFIG_IWL3945_DEBUG
3114         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3115         struct iwl3945_scanreq_notification *notif =
3116             (struct iwl3945_scanreq_notification *)pkt->u.raw;
3117
3118         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3119 #endif
3120 }
3121
3122 /* Service SCAN_START_NOTIFICATION (0x82) */
3123 static void iwl3945_rx_scan_start_notif(struct iwl3945_priv *priv,
3124                                     struct iwl3945_rx_mem_buffer *rxb)
3125 {
3126         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3127         struct iwl3945_scanstart_notification *notif =
3128             (struct iwl3945_scanstart_notification *)pkt->u.raw;
3129         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3130         IWL_DEBUG_SCAN("Scan start: "
3131                        "%d [802.11%s] "
3132                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3133                        notif->channel,
3134                        notif->band ? "bg" : "a",
3135                        notif->tsf_high,
3136                        notif->tsf_low, notif->status, notif->beacon_timer);
3137 }
3138
3139 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3140 static void iwl3945_rx_scan_results_notif(struct iwl3945_priv *priv,
3141                                       struct iwl3945_rx_mem_buffer *rxb)
3142 {
3143         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3144         struct iwl3945_scanresults_notification *notif =
3145             (struct iwl3945_scanresults_notification *)pkt->u.raw;
3146
3147         IWL_DEBUG_SCAN("Scan ch.res: "
3148                        "%d [802.11%s] "
3149                        "(TSF: 0x%08X:%08X) - %d "
3150                        "elapsed=%lu usec (%dms since last)\n",
3151                        notif->channel,
3152                        notif->band ? "bg" : "a",
3153                        le32_to_cpu(notif->tsf_high),
3154                        le32_to_cpu(notif->tsf_low),
3155                        le32_to_cpu(notif->statistics[0]),
3156                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3157                        jiffies_to_msecs(elapsed_jiffies
3158                                         (priv->last_scan_jiffies, jiffies)));
3159
3160         priv->last_scan_jiffies = jiffies;
3161         priv->next_scan_jiffies = 0;
3162 }
3163
3164 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3165 static void iwl3945_rx_scan_complete_notif(struct iwl3945_priv *priv,
3166                                        struct iwl3945_rx_mem_buffer *rxb)
3167 {
3168         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3169         struct iwl3945_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3170
3171         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3172                        scan_notif->scanned_channels,
3173                        scan_notif->tsf_low,
3174                        scan_notif->tsf_high, scan_notif->status);
3175
3176         /* The HW is no longer scanning */
3177         clear_bit(STATUS_SCAN_HW, &priv->status);
3178
3179         /* The scan completion notification came in, so kill that timer... */
3180         cancel_delayed_work(&priv->scan_check);
3181
3182         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3183                        (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
3184                                                         "2.4" : "5.2",
3185                        jiffies_to_msecs(elapsed_jiffies
3186                                         (priv->scan_pass_start, jiffies)));
3187
3188         /* Remove this scanned band from the list of pending
3189          * bands to scan, band G precedes A in order of scanning
3190          * as seen in iwl3945_bg_request_scan */
3191         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
3192                 priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
3193         else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
3194                 priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
3195
3196         /* If a request to abort was given, or the scan did not succeed
3197          * then we reset the scan state machine and terminate,
3198          * re-queuing another scan if one has been requested */
3199         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3200                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3201                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3202         } else {
3203                 /* If there are more bands on this scan pass reschedule */
3204                 if (priv->scan_bands > 0)
3205                         goto reschedule;
3206         }
3207
3208         priv->last_scan_jiffies = jiffies;
3209         priv->next_scan_jiffies = 0;
3210         IWL_DEBUG_INFO("Setting scan to off\n");
3211
3212         clear_bit(STATUS_SCANNING, &priv->status);
3213
3214         IWL_DEBUG_INFO("Scan took %dms\n",
3215                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3216
3217         queue_work(priv->workqueue, &priv->scan_completed);
3218
3219         return;
3220
3221 reschedule:
3222         priv->scan_pass_start = jiffies;
3223         queue_work(priv->workqueue, &priv->request_scan);
3224 }
3225
3226 /* Handle notification from uCode that card's power state is changing
3227  * due to software, hardware, or critical temperature RFKILL */
3228 static void iwl3945_rx_card_state_notif(struct iwl3945_priv *priv,
3229                                     struct iwl3945_rx_mem_buffer *rxb)
3230 {
3231         struct iwl3945_rx_packet *pkt = (void *)rxb->skb->data;
3232         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3233         unsigned long status = priv->status;
3234
3235         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3236                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3237                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3238
3239         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_SET,
3240                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3241
3242         if (flags & HW_CARD_DISABLED)
3243                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3244         else
3245                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3246
3247
3248         if (flags & SW_CARD_DISABLED)
3249                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3250         else
3251                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3252
3253         iwl3945_scan_cancel(priv);
3254
3255         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3256              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3257             (test_bit(STATUS_RF_KILL_SW, &status) !=
3258              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3259                 queue_work(priv->workqueue, &priv->rf_kill);
3260         else
3261                 wake_up_interruptible(&priv->wait_command_queue);
3262 }
3263
3264 /**
3265  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3266  *
3267  * Setup the RX handlers for each of the reply types sent from the uCode
3268  * to the host.
3269  *
3270  * This function chains into the hardware specific files for them to setup
3271  * any hardware specific handlers as well.
3272  */
3273 static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
3274 {
3275         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3276         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3277         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3278         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3279         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3280             iwl3945_rx_spectrum_measure_notif;
3281         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3282         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3283             iwl3945_rx_pm_debug_statistics_notif;
3284         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3285
3286         /*
3287          * The same handler is used for both the REPLY to a discrete
3288          * statistics request from the host as well as for the periodic
3289          * statistics notifications (after received beacons) from the uCode.
3290          */
3291         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3292         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3293
3294         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3295         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3296         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3297             iwl3945_rx_scan_results_notif;
3298         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3299             iwl3945_rx_scan_complete_notif;
3300         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3301
3302         /* Set up hardware specific Rx handlers */
3303         iwl3945_hw_rx_handler_setup(priv);
3304 }
3305
3306 /**
3307  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3308  * When FW advances 'R' index, all entries between old and new 'R' index
3309  * need to be reclaimed.
3310  */
3311 static void iwl3945_cmd_queue_reclaim(struct iwl3945_priv *priv,
3312                                       int txq_id, int index)
3313 {
3314         struct iwl3945_tx_queue *txq = &priv->txq[txq_id];
3315         struct iwl3945_queue *q = &txq->q;
3316         int nfreed = 0;
3317
3318         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3319                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3320                           "is out of range [0-%d] %d %d.\n", txq_id,
3321                           index, q->n_bd, q->write_ptr, q->read_ptr);
3322                 return;
3323         }
3324
3325         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3326                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3327                 if (nfreed > 1) {
3328                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3329                                         q->write_ptr, q->read_ptr);
3330                         queue_work(priv->workqueue, &priv->restart);
3331                         break;
3332                 }
3333                 nfreed++;
3334         }
3335 }
3336
3337
3338 /**
3339  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3340  * @rxb: Rx buffer to reclaim
3341  *
3342  * If an Rx buffer has an async callback associated with it the callback
3343  * will be executed.  The attached skb (if present) will only be freed
3344  * if the callback returns 1
3345  */
3346 static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
3347                                 struct iwl3945_rx_mem_buffer *rxb)
3348 {
3349         struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3350         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3351         int txq_id = SEQ_TO_QUEUE(sequence);
3352         int index = SEQ_TO_INDEX(sequence);
3353         int huge = sequence & SEQ_HUGE_FRAME;
3354         int cmd_index;
3355         struct iwl3945_cmd *cmd;
3356
3357         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3358
3359         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3360         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3361
3362         /* Input error checking is done when commands are added to queue. */
3363         if (cmd->meta.flags & CMD_WANT_SKB) {
3364                 cmd->meta.source->u.skb = rxb->skb;
3365                 rxb->skb = NULL;
3366         } else if (cmd->meta.u.callback &&
3367                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3368                 rxb->skb = NULL;
3369
3370         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3371
3372         if (!(cmd->meta.flags & CMD_ASYNC)) {
3373                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3374                 wake_up_interruptible(&priv->wait_command_queue);
3375         }
3376 }
3377
3378 /************************** RX-FUNCTIONS ****************************/
3379 /*
3380  * Rx theory of operation
3381  *
3382  * The host allocates 32 DMA target addresses and passes the host address
3383  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3384  * 0 to 31
3385  *
3386  * Rx Queue Indexes
3387  * The host/firmware share two index registers for managing the Rx buffers.
3388  *
3389  * The READ index maps to the first position that the firmware may be writing
3390  * to -- the driver can read up to (but not including) this position and get
3391  * good data.
3392  * The READ index is managed by the firmware once the card is enabled.
3393  *
3394  * The WRITE index maps to the last position the driver has read from -- the
3395  * position preceding WRITE is the last slot the firmware can place a packet.
3396  *
3397  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3398  * WRITE = READ.
3399  *
3400  * During initialization, the host sets up the READ queue position to the first
3401  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3402  *
3403  * When the firmware places a packet in a buffer, it will advance the READ index
3404  * and fire the RX interrupt.  The driver can then query the READ index and
3405  * process as many packets as possible, moving the WRITE index forward as it
3406  * resets the Rx queue buffers with new memory.
3407  *
3408  * The management in the driver is as follows:
3409  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3410  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3411  *   to replenish the iwl->rxq->rx_free.
3412  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3413  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3414  *   'processed' and 'read' driver indexes as well)
3415  * + A received packet is processed and handed to the kernel network stack,
3416  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3417  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3418  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3419  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3420  *   were enough free buffers and RX_STALLED is set it is cleared.
3421  *
3422  *
3423  * Driver sequence:
3424  *
3425  * iwl3945_rx_queue_alloc()   Allocates rx_free
3426  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3427  *                            iwl3945_rx_queue_restock
3428  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3429  *                            queue, updates firmware pointers, and updates
3430  *                            the WRITE index.  If insufficient rx_free buffers
3431  *                            are available, schedules iwl3945_rx_replenish
3432  *
3433  * -- enable interrupts --
3434  * ISR - iwl3945_rx()         Detach iwl3945_rx_mem_buffers from pool up to the
3435  *                            READ INDEX, detaching the SKB from the pool.
3436  *                            Moves the packet buffer from queue to rx_used.
3437  *                            Calls iwl3945_rx_queue_restock to refill any empty
3438  *                            slots.
3439  * ...
3440  *
3441  */
3442
3443 /**
3444  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3445  */
3446 static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
3447 {
3448         int s = q->read - q->write;
3449         if (s <= 0)
3450                 s += RX_QUEUE_SIZE;
3451         /* keep some buffer to not confuse full and empty queue */
3452         s -= 2;
3453         if (s < 0)
3454                 s = 0;
3455         return s;
3456 }
3457
3458 /**
3459  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3460  */
3461 int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
3462 {
3463         u32 reg = 0;
3464         int rc = 0;
3465         unsigned long flags;
3466
3467         spin_lock_irqsave(&q->lock, flags);
3468
3469         if (q->need_update == 0)
3470                 goto exit_unlock;
3471
3472         /* If power-saving is in use, make sure device is awake */
3473         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3474                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3475
3476                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3477                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3478                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3479                         goto exit_unlock;
3480                 }
3481
3482                 rc = iwl3945_grab_nic_access(priv);
3483                 if (rc)
3484                         goto exit_unlock;
3485
3486                 /* Device expects a multiple of 8 */
3487                 iwl3945_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3488                                      q->write & ~0x7);
3489                 iwl3945_release_nic_access(priv);
3490
3491         /* Else device is assumed to be awake */
3492         } else
3493                 /* Device expects a multiple of 8 */
3494                 iwl3945_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3495
3496
3497         q->need_update = 0;
3498
3499  exit_unlock:
3500         spin_unlock_irqrestore(&q->lock, flags);
3501         return rc;
3502 }
3503
3504 /**
3505  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3506  */
3507 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
3508                                           dma_addr_t dma_addr)
3509 {
3510         return cpu_to_le32((u32)dma_addr);
3511 }
3512
3513 /**
3514  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3515  *
3516  * If there are slots in the RX queue that need to be restocked,
3517  * and we have free pre-allocated buffers, fill the ranks as much
3518  * as we can, pulling from rx_free.
3519  *
3520  * This moves the 'write' index forward to catch up with 'processed', and
3521  * also updates the memory address in the firmware to reference the new
3522  * target buffer.
3523  */
3524 static int iwl3945_rx_queue_restock(struct iwl3945_priv *priv)
3525 {
3526         struct iwl3945_rx_queue *rxq = &priv->rxq;
3527         struct list_head *element;
3528         struct iwl3945_rx_mem_buffer *rxb;
3529         unsigned long flags;
3530         int write, rc;
3531
3532         spin_lock_irqsave(&rxq->lock, flags);
3533         write = rxq->write & ~0x7;
3534         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3535                 /* Get next free Rx buffer, remove from free list */
3536                 element = rxq->rx_free.next;
3537                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3538                 list_del(element);
3539
3540                 /* Point to Rx buffer via next RBD in circular buffer */
3541                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3542                 rxq->queue[rxq->write] = rxb;
3543                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3544                 rxq->free_count--;
3545         }
3546         spin_unlock_irqrestore(&rxq->lock, flags);
3547         /* If the pre-allocated buffer pool is dropping low, schedule to
3548          * refill it */
3549         if (rxq->free_count <= RX_LOW_WATERMARK)
3550                 queue_work(priv->workqueue, &priv->rx_replenish);
3551
3552
3553         /* If we've added more space for the firmware to place data, tell it.
3554          * Increment device's write pointer in multiples of 8. */
3555         if ((write != (rxq->write & ~0x7))
3556             || (abs(rxq->write - rxq->read) > 7)) {
3557                 spin_lock_irqsave(&rxq->lock, flags);
3558                 rxq->need_update = 1;
3559                 spin_unlock_irqrestore(&rxq->lock, flags);
3560                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3561                 if (rc)
3562                         return rc;
3563         }
3564
3565         return 0;
3566 }
3567
3568 /**
3569  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3570  *
3571  * When moving to rx_free an SKB is allocated for the slot.
3572  *
3573  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3574  * This is called as a scheduled work item (except for during initialization)
3575  */
3576 static void iwl3945_rx_allocate(struct iwl3945_priv *priv)
3577 {
3578         struct iwl3945_rx_queue *rxq = &priv->rxq;
3579         struct list_head *element;
3580         struct iwl3945_rx_mem_buffer *rxb;
3581         unsigned long flags;
3582         spin_lock_irqsave(&rxq->lock, flags);
3583         while (!list_empty(&rxq->rx_used)) {
3584                 element = rxq->rx_used.next;
3585                 rxb = list_entry(element, struct iwl3945_rx_mem_buffer, list);
3586
3587                 /* Alloc a new receive buffer */
3588                 rxb->skb =
3589                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3590                 if (!rxb->skb) {
3591                         if (net_ratelimit())
3592                                 printk(KERN_CRIT DRV_NAME
3593                                        ": Can not allocate SKB buffers\n");
3594                         /* We don't reschedule replenish work here -- we will
3595                          * call the restock method and if it still needs
3596                          * more buffers it will schedule replenish */
3597                         break;
3598                 }
3599
3600                 /* If radiotap head is required, reserve some headroom here.
3601                  * The physical head count is a variable rx_stats->phy_count.
3602                  * We reserve 4 bytes here. Plus these extra bytes, the
3603                  * headroom of the physical head should be enough for the
3604                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3605                  */
3606                 skb_reserve(rxb->skb, 4);
3607
3608                 priv->alloc_rxb_skb++;
3609                 list_del(element);
3610
3611                 /* Get physical address of RB/SKB */
3612                 rxb->dma_addr =
3613                     pci_map_single(priv->pci_dev, rxb->skb->data,
3614                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3615                 list_add_tail(&rxb->list, &rxq->rx_free);
3616                 rxq->free_count++;
3617         }
3618         spin_unlock_irqrestore(&rxq->lock, flags);
3619 }
3620
3621 /*
3622  * this should be called while priv->lock is locked
3623  */
3624 static void __iwl3945_rx_replenish(void *data)
3625 {
3626         struct iwl3945_priv *priv = data;
3627
3628         iwl3945_rx_allocate(priv);
3629         iwl3945_rx_queue_restock(priv);
3630 }
3631
3632
3633 void iwl3945_rx_replenish(void *data)
3634 {
3635         struct iwl3945_priv *priv = data;
3636         unsigned long flags;
3637
3638         iwl3945_rx_allocate(priv);
3639
3640         spin_lock_irqsave(&priv->lock, flags);
3641         iwl3945_rx_queue_restock(priv);
3642         spin_unlock_irqrestore(&priv->lock, flags);
3643 }
3644
3645 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3646  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3647  * This free routine walks the list of POOL entries and if SKB is set to
3648  * non NULL it is unmapped and freed
3649  */
3650 static void iwl3945_rx_queue_free(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3651 {
3652         int i;
3653         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3654                 if (rxq->pool[i].skb != NULL) {
3655                         pci_unmap_single(priv->pci_dev,
3656                                          rxq->pool[i].dma_addr,
3657                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3658                         dev_kfree_skb(rxq->pool[i].skb);
3659                 }
3660         }
3661
3662         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3663                             rxq->dma_addr);
3664         rxq->bd = NULL;
3665 }
3666
3667 int iwl3945_rx_queue_alloc(struct iwl3945_priv *priv)
3668 {
3669         struct iwl3945_rx_queue *rxq = &priv->rxq;
3670         struct pci_dev *dev = priv->pci_dev;
3671         int i;
3672
3673         spin_lock_init(&rxq->lock);
3674         INIT_LIST_HEAD(&rxq->rx_free);
3675         INIT_LIST_HEAD(&rxq->rx_used);
3676
3677         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3678         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3679         if (!rxq->bd)
3680                 return -ENOMEM;
3681
3682         /* Fill the rx_used queue with _all_ of the Rx buffers */
3683         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3684                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3685
3686         /* Set us so that we have processed and used all buffers, but have
3687          * not restocked the Rx queue with fresh buffers */
3688         rxq->read = rxq->write = 0;
3689         rxq->free_count = 0;
3690         rxq->need_update = 0;
3691         return 0;
3692 }
3693
3694 void iwl3945_rx_queue_reset(struct iwl3945_priv *priv, struct iwl3945_rx_queue *rxq)
3695 {
3696         unsigned long flags;
3697         int i;
3698         spin_lock_irqsave(&rxq->lock, flags);
3699         INIT_LIST_HEAD(&rxq->rx_free);
3700         INIT_LIST_HEAD(&rxq->rx_used);
3701         /* Fill the rx_used queue with _all_ of the Rx buffers */
3702         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3703                 /* In the reset function, these buffers may have been allocated
3704                  * to an SKB, so we need to unmap and free potential storage */
3705                 if (rxq->pool[i].skb != NULL) {
3706                         pci_unmap_single(priv->pci_dev,
3707                                          rxq->pool[i].dma_addr,
3708                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3709                         priv->alloc_rxb_skb--;
3710                         dev_kfree_skb(rxq->pool[i].skb);
3711                         rxq->pool[i].skb = NULL;
3712                 }
3713                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3714         }
3715
3716         /* Set us so that we have processed and used all buffers, but have
3717          * not restocked the Rx queue with fresh buffers */
3718         rxq->read = rxq->write = 0;
3719         rxq->free_count = 0;
3720         spin_unlock_irqrestore(&rxq->lock, flags);
3721 }
3722
3723 /* Convert linear signal-to-noise ratio into dB */
3724 static u8 ratio2dB[100] = {
3725 /*       0   1   2   3   4   5   6   7   8   9 */
3726          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3727         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3728         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3729         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3730         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3731         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3732         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3733         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3734         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3735         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3736 };
3737
3738 /* Calculates a relative dB value from a ratio of linear
3739  *   (i.e. not dB) signal levels.
3740  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3741 int iwl3945_calc_db_from_ratio(int sig_ratio)
3742 {
3743         /* 1000:1 or higher just report as 60 dB */
3744         if (sig_ratio >= 1000)
3745                 return 60;
3746
3747         /* 100:1 or higher, divide by 10 and use table,
3748          *   add 20 dB to make up for divide by 10 */
3749         if (sig_ratio >= 100)
3750                 return 20 + (int)ratio2dB[sig_ratio/10];
3751
3752         /* We shouldn't see this */
3753         if (sig_ratio < 1)
3754                 return 0;
3755
3756         /* Use table for ratios 1:1 - 99:1 */
3757         return (int)ratio2dB[sig_ratio];
3758 }
3759
3760 #define PERFECT_RSSI (-20) /* dBm */
3761 #define WORST_RSSI (-95)   /* dBm */
3762 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3763
3764 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3765  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3766  *   about formulas used below. */
3767 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3768 {
3769         int sig_qual;
3770         int degradation = PERFECT_RSSI - rssi_dbm;
3771
3772         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3773          * as indicator; formula is (signal dbm - noise dbm).
3774          * SNR at or above 40 is a great signal (100%).
3775          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3776          * Weakest usable signal is usually 10 - 15 dB SNR. */
3777         if (noise_dbm) {
3778                 if (rssi_dbm - noise_dbm >= 40)
3779                         return 100;
3780                 else if (rssi_dbm < noise_dbm)
3781                         return 0;
3782                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3783
3784         /* Else use just the signal level.
3785          * This formula is a least squares fit of data points collected and
3786          *   compared with a reference system that had a percentage (%) display
3787          *   for signal quality. */
3788         } else
3789                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3790                             (15 * RSSI_RANGE + 62 * degradation)) /
3791                            (RSSI_RANGE * RSSI_RANGE);
3792
3793         if (sig_qual > 100)
3794                 sig_qual = 100;
3795         else if (sig_qual < 1)
3796                 sig_qual = 0;
3797
3798         return sig_qual;
3799 }
3800
3801 /**
3802  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3803  *
3804  * Uses the priv->rx_handlers callback function array to invoke
3805  * the appropriate handlers, including command responses,
3806  * frame-received notifications, and other notifications.
3807  */
3808 static void iwl3945_rx_handle(struct iwl3945_priv *priv)
3809 {
3810         struct iwl3945_rx_mem_buffer *rxb;
3811         struct iwl3945_rx_packet *pkt;
3812         struct iwl3945_rx_queue *rxq = &priv->rxq;
3813         u32 r, i;
3814         int reclaim;
3815         unsigned long flags;
3816         u8 fill_rx = 0;
3817         u32 count = 8;
3818
3819         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3820          * buffer that the driver may process (last buffer filled by ucode). */
3821         r = iwl3945_hw_get_rx_read(priv);
3822         i = rxq->read;
3823
3824         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3825                 fill_rx = 1;
3826         /* Rx interrupt, but nothing sent from uCode */
3827         if (i == r)
3828                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3829
3830         while (i != r) {
3831                 rxb = rxq->queue[i];
3832
3833                 /* If an RXB doesn't have a Rx queue slot associated with it,
3834                  * then a bug has been introduced in the queue refilling
3835                  * routines -- catch it here */
3836                 BUG_ON(rxb == NULL);
3837
3838                 rxq->queue[i] = NULL;
3839
3840                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
3841                                             IWL_RX_BUF_SIZE,
3842                                             PCI_DMA_FROMDEVICE);
3843                 pkt = (struct iwl3945_rx_packet *)rxb->skb->data;
3844
3845                 /* Reclaim a command buffer only if this packet is a response
3846                  *   to a (driver-originated) command.
3847                  * If the packet (e.g. Rx frame) originated from uCode,
3848                  *   there is no command buffer to reclaim.
3849                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3850                  *   but apparently a few don't get set; catch them here. */
3851                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3852                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3853                         (pkt->hdr.cmd != REPLY_TX);
3854
3855                 /* Based on type of command response or notification,
3856                  *   handle those that need handling via function in
3857                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
3858                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3859                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3860                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3861                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3862                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3863                 } else {
3864                         /* No handling needed */
3865                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
3866                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3867                                 r, i, get_cmd_string(pkt->hdr.cmd),
3868                                 pkt->hdr.cmd);
3869                 }
3870
3871                 if (reclaim) {
3872                         /* Invoke any callbacks, transfer the skb to caller, and
3873                          * fire off the (possibly) blocking iwl3945_send_cmd()
3874                          * as we reclaim the driver command queue */
3875                         if (rxb && rxb->skb)
3876                                 iwl3945_tx_cmd_complete(priv, rxb);
3877                         else
3878                                 IWL_WARNING("Claim null rxb?\n");
3879                 }
3880
3881                 /* For now we just don't re-use anything.  We can tweak this
3882                  * later to try and re-use notification packets and SKBs that
3883                  * fail to Rx correctly */
3884                 if (rxb->skb != NULL) {
3885                         priv->alloc_rxb_skb--;
3886                         dev_kfree_skb_any(rxb->skb);
3887                         rxb->skb = NULL;
3888                 }
3889
3890                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
3891                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3892                 spin_lock_irqsave(&rxq->lock, flags);
3893                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3894                 spin_unlock_irqrestore(&rxq->lock, flags);
3895                 i = (i + 1) & RX_QUEUE_MASK;
3896                 /* If there are a lot of unused frames,
3897                  * restock the Rx queue so ucode won't assert. */
3898                 if (fill_rx) {
3899                         count++;
3900                         if (count >= 8) {
3901                                 priv->rxq.read = i;
3902                                 __iwl3945_rx_replenish(priv);
3903                                 count = 0;
3904                         }
3905                 }
3906         }
3907
3908         /* Backtrack one entry */
3909         priv->rxq.read = i;
3910         iwl3945_rx_queue_restock(priv);
3911 }
3912
3913 /**
3914  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
3915  */
3916 static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
3917                                   struct iwl3945_tx_queue *txq)
3918 {
3919         u32 reg = 0;
3920         int rc = 0;
3921         int txq_id = txq->q.id;
3922
3923         if (txq->need_update == 0)
3924                 return rc;
3925
3926         /* if we're trying to save power */
3927         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3928                 /* wake up nic if it's powered down ...
3929                  * uCode will wake up, and interrupt us again, so next
3930                  * time we'll skip this part. */
3931                 reg = iwl3945_read32(priv, CSR_UCODE_DRV_GP1);
3932
3933                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3934                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3935                         iwl3945_set_bit(priv, CSR_GP_CNTRL,
3936                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3937                         return rc;
3938                 }
3939
3940                 /* restore this queue's parameters in nic hardware. */
3941                 rc = iwl3945_grab_nic_access(priv);
3942                 if (rc)
3943                         return rc;
3944                 iwl3945_write_direct32(priv, HBUS_TARG_WRPTR,
3945                                      txq->q.write_ptr | (txq_id << 8));
3946                 iwl3945_release_nic_access(priv);
3947
3948         /* else not in power-save mode, uCode will never sleep when we're
3949          * trying to tx (during RFKILL, we're not trying to tx). */
3950         } else
3951                 iwl3945_write32(priv, HBUS_TARG_WRPTR,
3952                             txq->q.write_ptr | (txq_id << 8));
3953
3954         txq->need_update = 0;
3955
3956         return rc;
3957 }
3958
3959 #ifdef CONFIG_IWL3945_DEBUG
3960 static void iwl3945_print_rx_config_cmd(struct iwl3945_rxon_cmd *rxon)
3961 {
3962         IWL_DEBUG_RADIO("RX CONFIG:\n");
3963         iwl3945_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3964         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3965         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3966         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3967                         le32_to_cpu(rxon->filter_flags));
3968         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3969         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3970                         rxon->ofdm_basic_rates);
3971         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3972         IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
3973         IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
3974         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3975 }
3976 #endif
3977
3978 static void iwl3945_enable_interrupts(struct iwl3945_priv *priv)
3979 {
3980         IWL_DEBUG_ISR("Enabling interrupts\n");
3981         set_bit(STATUS_INT_ENABLED, &priv->status);
3982         iwl3945_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3983 }
3984
3985
3986 /* call this function to flush any scheduled tasklet */
3987 static inline void iwl_synchronize_irq(struct iwl3945_priv *priv)
3988 {
3989         /* wait to make sure we flush pending tasklet*/
3990         synchronize_irq(priv->pci_dev->irq);
3991         tasklet_kill(&priv->irq_tasklet);
3992 }
3993
3994
3995 static inline void iwl3945_disable_interrupts(struct iwl3945_priv *priv)
3996 {
3997         clear_bit(STATUS_INT_ENABLED, &priv->status);
3998
3999         /* disable interrupts from uCode/NIC to host */
4000         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4001
4002         /* acknowledge/clear/reset any interrupts still pending
4003          * from uCode or flow handler (Rx/Tx DMA) */
4004         iwl3945_write32(priv, CSR_INT, 0xffffffff);
4005         iwl3945_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4006         IWL_DEBUG_ISR("Disabled interrupts\n");
4007 }
4008
4009 static const char *desc_lookup(int i)
4010 {
4011         switch (i) {
4012         case 1:
4013                 return "FAIL";
4014         case 2:
4015                 return "BAD_PARAM";
4016         case 3:
4017                 return "BAD_CHECKSUM";
4018         case 4:
4019                 return "NMI_INTERRUPT";
4020         case 5:
4021                 return "SYSASSERT";
4022         case 6:
4023                 return "FATAL_ERROR";
4024         }
4025
4026         return "UNKNOWN";
4027 }
4028
4029 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4030 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4031
4032 static void iwl3945_dump_nic_error_log(struct iwl3945_priv *priv)
4033 {
4034         u32 i;
4035         u32 desc, time, count, base, data1;
4036         u32 blink1, blink2, ilink1, ilink2;
4037         int rc;
4038
4039         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4040
4041         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4042                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4043                 return;
4044         }
4045
4046         rc = iwl3945_grab_nic_access(priv);
4047         if (rc) {
4048                 IWL_WARNING("Can not read from adapter at this time.\n");
4049                 return;
4050         }
4051
4052         count = iwl3945_read_targ_mem(priv, base);
4053
4054         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4055                 IWL_ERROR("Start IWL Error Log Dump:\n");
4056                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4057         }
4058
4059         IWL_ERROR("Desc       Time       asrtPC  blink2 "
4060                   "ilink1  nmiPC   Line\n");
4061         for (i = ERROR_START_OFFSET;
4062              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
4063              i += ERROR_ELEM_SIZE) {
4064                 desc = iwl3945_read_targ_mem(priv, base + i);
4065                 time =
4066                     iwl3945_read_targ_mem(priv, base + i + 1 * sizeof(u32));
4067                 blink1 =
4068                     iwl3945_read_targ_mem(priv, base + i + 2 * sizeof(u32));
4069                 blink2 =
4070                     iwl3945_read_targ_mem(priv, base + i + 3 * sizeof(u32));
4071                 ilink1 =
4072                     iwl3945_read_targ_mem(priv, base + i + 4 * sizeof(u32));
4073                 ilink2 =
4074                     iwl3945_read_targ_mem(priv, base + i + 5 * sizeof(u32));
4075                 data1 =
4076                     iwl3945_read_targ_mem(priv, base + i + 6 * sizeof(u32));
4077
4078                 IWL_ERROR
4079                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
4080                      desc_lookup(desc), desc, time, blink1, blink2,
4081                      ilink1, ilink2, data1);
4082         }
4083
4084         iwl3945_release_nic_access(priv);
4085
4086 }
4087
4088 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4089
4090 /**
4091  * iwl3945_print_event_log - Dump error event log to syslog
4092  *
4093  * NOTE: Must be called with iwl3945_grab_nic_access() already obtained!
4094  */
4095 static void iwl3945_print_event_log(struct iwl3945_priv *priv, u32 start_idx,
4096                                 u32 num_events, u32 mode)
4097 {
4098         u32 i;
4099         u32 base;       /* SRAM byte address of event log header */
4100         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4101         u32 ptr;        /* SRAM byte address of log data */
4102         u32 ev, time, data; /* event log data */
4103
4104         if (num_events == 0)
4105                 return;
4106
4107         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4108
4109         if (mode == 0)
4110                 event_size = 2 * sizeof(u32);
4111         else
4112                 event_size = 3 * sizeof(u32);
4113
4114         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4115
4116         /* "time" is actually "data" for mode 0 (no timestamp).
4117          * place event id # at far right for easier visual parsing. */
4118         for (i = 0; i < num_events; i++) {
4119                 ev = iwl3945_read_targ_mem(priv, ptr);
4120                 ptr += sizeof(u32);
4121                 time = iwl3945_read_targ_mem(priv, ptr);
4122                 ptr += sizeof(u32);
4123                 if (mode == 0)
4124                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4125                 else {
4126                         data = iwl3945_read_targ_mem(priv, ptr);
4127                         ptr += sizeof(u32);
4128                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4129                 }
4130         }
4131 }
4132
4133 static void iwl3945_dump_nic_event_log(struct iwl3945_priv *priv)
4134 {
4135         int rc;
4136         u32 base;       /* SRAM byte address of event log header */
4137         u32 capacity;   /* event log capacity in # entries */
4138         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4139         u32 num_wraps;  /* # times uCode wrapped to top of log */
4140         u32 next_entry; /* index of next entry to be written by uCode */
4141         u32 size;       /* # entries that we'll print */
4142
4143         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4144         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4145                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4146                 return;
4147         }
4148
4149         rc = iwl3945_grab_nic_access(priv);
4150         if (rc) {
4151                 IWL_WARNING("Can not read from adapter at this time.\n");
4152                 return;
4153         }
4154
4155         /* event log header */
4156         capacity = iwl3945_read_targ_mem(priv, base);
4157         mode = iwl3945_read_targ_mem(priv, base + (1 * sizeof(u32)));
4158         num_wraps = iwl3945_read_targ_mem(priv, base + (2 * sizeof(u32)));
4159         next_entry = iwl3945_read_targ_mem(priv, base + (3 * sizeof(u32)));
4160
4161         size = num_wraps ? capacity : next_entry;
4162
4163         /* bail out if nothing in log */
4164         if (size == 0) {
4165                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4166                 iwl3945_release_nic_access(priv);
4167                 return;
4168         }
4169
4170         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4171                   size, num_wraps);
4172
4173         /* if uCode has wrapped back to top of log, start at the oldest entry,
4174          * i.e the next one that uCode would fill. */
4175         if (num_wraps)
4176                 iwl3945_print_event_log(priv, next_entry,
4177                                     capacity - next_entry, mode);
4178
4179         /* (then/else) start at top of log */
4180         iwl3945_print_event_log(priv, 0, next_entry, mode);
4181
4182         iwl3945_release_nic_access(priv);
4183 }
4184
4185 /**
4186  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4187  */
4188 static void iwl3945_irq_handle_error(struct iwl3945_priv *priv)
4189 {
4190         /* Set the FW error flag -- cleared on iwl3945_down */
4191         set_bit(STATUS_FW_ERROR, &priv->status);
4192
4193         /* Cancel currently queued command. */
4194         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4195
4196 #ifdef CONFIG_IWL3945_DEBUG
4197         if (iwl3945_debug_level & IWL_DL_FW_ERRORS) {
4198                 iwl3945_dump_nic_error_log(priv);
4199                 iwl3945_dump_nic_event_log(priv);
4200                 iwl3945_print_rx_config_cmd(&priv->staging_rxon);
4201         }
4202 #endif
4203
4204         wake_up_interruptible(&priv->wait_command_queue);
4205
4206         /* Keep the restart process from trying to send host
4207          * commands by clearing the INIT status bit */
4208         clear_bit(STATUS_READY, &priv->status);
4209
4210         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4211                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4212                           "Restarting adapter due to uCode error.\n");
4213
4214                 if (iwl3945_is_associated(priv)) {
4215                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4216                                sizeof(priv->recovery_rxon));
4217                         priv->error_recovering = 1;
4218                 }
4219                 queue_work(priv->workqueue, &priv->restart);
4220         }
4221 }
4222
4223 static void iwl3945_error_recovery(struct iwl3945_priv *priv)
4224 {
4225         unsigned long flags;
4226
4227         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4228                sizeof(priv->staging_rxon));
4229         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4230         iwl3945_commit_rxon(priv);
4231
4232         iwl3945_add_station(priv, priv->bssid, 1, 0);
4233
4234         spin_lock_irqsave(&priv->lock, flags);
4235         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4236         priv->error_recovering = 0;
4237         spin_unlock_irqrestore(&priv->lock, flags);
4238 }
4239
4240 static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
4241 {
4242         u32 inta, handled = 0;
4243         u32 inta_fh;
4244         unsigned long flags;
4245 #ifdef CONFIG_IWL3945_DEBUG
4246         u32 inta_mask;
4247 #endif
4248
4249         spin_lock_irqsave(&priv->lock, flags);
4250
4251         /* Ack/clear/reset pending uCode interrupts.
4252          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4253          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4254         inta = iwl3945_read32(priv, CSR_INT);
4255         iwl3945_write32(priv, CSR_INT, inta);
4256
4257         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4258          * Any new interrupts that happen after this, either while we're
4259          * in this tasklet, or later, will show up in next ISR/tasklet. */
4260         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4261         iwl3945_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4262
4263 #ifdef CONFIG_IWL3945_DEBUG
4264         if (iwl3945_debug_level & IWL_DL_ISR) {
4265                 /* just for debug */
4266                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4267                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4268                               inta, inta_mask, inta_fh);
4269         }
4270 #endif
4271
4272         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4273          * atomic, make sure that inta covers all the interrupts that
4274          * we've discovered, even if FH interrupt came in just after
4275          * reading CSR_INT. */
4276         if (inta_fh & CSR39_FH_INT_RX_MASK)
4277                 inta |= CSR_INT_BIT_FH_RX;
4278         if (inta_fh & CSR39_FH_INT_TX_MASK)
4279                 inta |= CSR_INT_BIT_FH_TX;
4280
4281         /* Now service all interrupt bits discovered above. */
4282         if (inta & CSR_INT_BIT_HW_ERR) {
4283                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4284
4285                 /* Tell the device to stop sending interrupts */
4286                 iwl3945_disable_interrupts(priv);
4287
4288                 iwl3945_irq_handle_error(priv);
4289
4290                 handled |= CSR_INT_BIT_HW_ERR;
4291
4292                 spin_unlock_irqrestore(&priv->lock, flags);
4293
4294                 return;
4295         }
4296
4297 #ifdef CONFIG_IWL3945_DEBUG
4298         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4299                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4300                 if (inta & CSR_INT_BIT_SCD)
4301                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4302                                       "the frame/frames.\n");
4303
4304                 /* Alive notification via Rx interrupt will do the real work */
4305                 if (inta & CSR_INT_BIT_ALIVE)
4306                         IWL_DEBUG_ISR("Alive interrupt\n");
4307         }
4308 #endif
4309         /* Safely ignore these bits for debug checks below */
4310         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4311
4312         /* HW RF KILL switch toggled (4965 only) */
4313         if (inta & CSR_INT_BIT_RF_KILL) {
4314                 int hw_rf_kill = 0;
4315                 if (!(iwl3945_read32(priv, CSR_GP_CNTRL) &
4316                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4317                         hw_rf_kill = 1;
4318
4319                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4320                                 "RF_KILL bit toggled to %s.\n",
4321                                 hw_rf_kill ? "disable radio":"enable radio");
4322
4323                 /* Queue restart only if RF_KILL switch was set to "kill"
4324                  *   when we loaded driver, and is now set to "enable".
4325                  * After we're Alive, RF_KILL gets handled by
4326                  *   iwl3945_rx_card_state_notif() */
4327                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4328                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4329                         queue_work(priv->workqueue, &priv->restart);
4330                 }
4331
4332                 handled |= CSR_INT_BIT_RF_KILL;
4333         }
4334
4335         /* Chip got too hot and stopped itself (4965 only) */
4336         if (inta & CSR_INT_BIT_CT_KILL) {
4337                 IWL_ERROR("Microcode CT kill error detected.\n");
4338                 handled |= CSR_INT_BIT_CT_KILL;
4339         }
4340
4341         /* Error detected by uCode */
4342         if (inta & CSR_INT_BIT_SW_ERR) {
4343                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4344                           inta);
4345                 iwl3945_irq_handle_error(priv);
4346                 handled |= CSR_INT_BIT_SW_ERR;
4347         }
4348
4349         /* uCode wakes up after power-down sleep */
4350         if (inta & CSR_INT_BIT_WAKEUP) {
4351                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4352                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4353                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4354                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4355                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4356                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4357                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4358                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4359
4360                 handled |= CSR_INT_BIT_WAKEUP;
4361         }
4362
4363         /* All uCode command responses, including Tx command responses,
4364          * Rx "responses" (frame-received notification), and other
4365          * notifications from uCode come through here*/
4366         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4367                 iwl3945_rx_handle(priv);
4368                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4369         }
4370
4371         if (inta & CSR_INT_BIT_FH_TX) {
4372                 IWL_DEBUG_ISR("Tx interrupt\n");
4373
4374                 iwl3945_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4375                 if (!iwl3945_grab_nic_access(priv)) {
4376                         iwl3945_write_direct32(priv,
4377                                              FH_TCSR_CREDIT
4378                                              (ALM_FH_SRVC_CHNL), 0x0);
4379                         iwl3945_release_nic_access(priv);
4380                 }
4381                 handled |= CSR_INT_BIT_FH_TX;
4382         }
4383
4384         if (inta & ~handled)
4385                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4386
4387         if (inta & ~CSR_INI_SET_MASK) {
4388                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4389                          inta & ~CSR_INI_SET_MASK);
4390                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4391         }
4392
4393         /* Re-enable all interrupts */
4394         /* only Re-enable if disabled by irq */
4395         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4396                 iwl3945_enable_interrupts(priv);
4397
4398 #ifdef CONFIG_IWL3945_DEBUG
4399         if (iwl3945_debug_level & (IWL_DL_ISR)) {
4400                 inta = iwl3945_read32(priv, CSR_INT);
4401                 inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
4402                 inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4403                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4404                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4405         }
4406 #endif
4407         spin_unlock_irqrestore(&priv->lock, flags);
4408 }
4409
4410 static irqreturn_t iwl3945_isr(int irq, void *data)
4411 {
4412         struct iwl3945_priv *priv = data;
4413         u32 inta, inta_mask;
4414         u32 inta_fh;
4415         if (!priv)
4416                 return IRQ_NONE;
4417
4418         spin_lock(&priv->lock);
4419
4420         /* Disable (but don't clear!) interrupts here to avoid
4421          *    back-to-back ISRs and sporadic interrupts from our NIC.
4422          * If we have something to service, the tasklet will re-enable ints.
4423          * If we *don't* have something, we'll re-enable before leaving here. */
4424         inta_mask = iwl3945_read32(priv, CSR_INT_MASK);  /* just for debug */
4425         iwl3945_write32(priv, CSR_INT_MASK, 0x00000000);
4426
4427         /* Discover which interrupts are active/pending */
4428         inta = iwl3945_read32(priv, CSR_INT);
4429         inta_fh = iwl3945_read32(priv, CSR_FH_INT_STATUS);
4430
4431         /* Ignore interrupt if there's nothing in NIC to service.
4432          * This may be due to IRQ shared with another device,
4433          * or due to sporadic interrupts thrown from our NIC. */
4434         if (!inta && !inta_fh) {
4435                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4436                 goto none;
4437         }
4438
4439         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4440                 /* Hardware disappeared */
4441                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4442                 goto unplugged;
4443         }
4444
4445         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4446                       inta, inta_mask, inta_fh);
4447
4448         inta &= ~CSR_INT_BIT_SCD;
4449
4450         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4451         if (likely(inta || inta_fh))
4452                 tasklet_schedule(&priv->irq_tasklet);
4453 unplugged:
4454         spin_unlock(&priv->lock);
4455
4456         return IRQ_HANDLED;
4457
4458  none:
4459         /* re-enable interrupts here since we don't have anything to service. */
4460         /* only Re-enable if disabled by irq */
4461         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4462                 iwl3945_enable_interrupts(priv);
4463         spin_unlock(&priv->lock);
4464         return IRQ_NONE;
4465 }
4466
4467 /************************** EEPROM BANDS ****************************
4468  *
4469  * The iwl3945_eeprom_band definitions below provide the mapping from the
4470  * EEPROM contents to the specific channel number supported for each
4471  * band.
4472  *
4473  * For example, iwl3945_priv->eeprom.band_3_channels[4] from the band_3
4474  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4475  * The specific geography and calibration information for that channel
4476  * is contained in the eeprom map itself.
4477  *
4478  * During init, we copy the eeprom information and channel map
4479  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4480  *
4481  * channel_map_24/52 provides the index in the channel_info array for a
4482  * given channel.  We have to have two separate maps as there is channel
4483  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4484  * band_2
4485  *
4486  * A value of 0xff stored in the channel_map indicates that the channel
4487  * is not supported by the hardware at all.
4488  *
4489  * A value of 0xfe in the channel_map indicates that the channel is not
4490  * valid for Tx with the current hardware.  This means that
4491  * while the system can tune and receive on a given channel, it may not
4492  * be able to associate or transmit any frames on that
4493  * channel.  There is no corresponding channel information for that
4494  * entry.
4495  *
4496  *********************************************************************/
4497
4498 /* 2.4 GHz */
4499 static const u8 iwl3945_eeprom_band_1[14] = {
4500         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4501 };
4502
4503 /* 5.2 GHz bands */
4504 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4505         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4506 };
4507
4508 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4509         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4510 };
4511
4512 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4513         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4514 };
4515
4516 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4517         145, 149, 153, 157, 161, 165
4518 };
4519
4520 static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int band,
4521                                     int *eeprom_ch_count,
4522                                     const struct iwl3945_eeprom_channel
4523                                     **eeprom_ch_info,
4524                                     const u8 **eeprom_ch_index)
4525 {
4526         switch (band) {
4527         case 1:         /* 2.4GHz band */
4528                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4529                 *eeprom_ch_info = priv->eeprom.band_1_channels;
4530                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4531                 break;
4532         case 2:         /* 4.9GHz band */
4533                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4534                 *eeprom_ch_info = priv->eeprom.band_2_channels;
4535                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4536                 break;
4537         case 3:         /* 5.2GHz band */
4538                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4539                 *eeprom_ch_info = priv->eeprom.band_3_channels;
4540                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4541                 break;
4542         case 4:         /* 5.5GHz band */
4543                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4544                 *eeprom_ch_info = priv->eeprom.band_4_channels;
4545                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4546                 break;
4547         case 5:         /* 5.7GHz band */
4548                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4549                 *eeprom_ch_info = priv->eeprom.band_5_channels;
4550                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4551                 break;
4552         default:
4553                 BUG();
4554                 return;
4555         }
4556 }
4557
4558 /**
4559  * iwl3945_get_channel_info - Find driver's private channel info
4560  *
4561  * Based on band and channel number.
4562  */
4563 const struct iwl3945_channel_info *iwl3945_get_channel_info(const struct iwl3945_priv *priv,
4564                                                     enum ieee80211_band band, u16 channel)
4565 {
4566         int i;
4567
4568         switch (band) {
4569         case IEEE80211_BAND_5GHZ:
4570                 for (i = 14; i < priv->channel_count; i++) {
4571                         if (priv->channel_info[i].channel == channel)
4572                                 return &priv->channel_info[i];
4573                 }
4574                 break;
4575
4576         case IEEE80211_BAND_2GHZ:
4577                 if (channel >= 1 && channel <= 14)
4578                         return &priv->channel_info[channel - 1];
4579                 break;
4580         case IEEE80211_NUM_BANDS:
4581                 WARN_ON(1);
4582         }
4583
4584         return NULL;
4585 }
4586
4587 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4588                             ? # x " " : "")
4589
4590 /**
4591  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4592  */
4593 static int iwl3945_init_channel_map(struct iwl3945_priv *priv)
4594 {
4595         int eeprom_ch_count = 0;
4596         const u8 *eeprom_ch_index = NULL;
4597         const struct iwl3945_eeprom_channel *eeprom_ch_info = NULL;
4598         int band, ch;
4599         struct iwl3945_channel_info *ch_info;
4600
4601         if (priv->channel_count) {
4602                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4603                 return 0;
4604         }
4605
4606         if (priv->eeprom.version < 0x2f) {
4607                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
4608                             priv->eeprom.version);
4609                 return -EINVAL;
4610         }
4611
4612         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4613
4614         priv->channel_count =
4615             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4616             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4617             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4618             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4619             ARRAY_SIZE(iwl3945_eeprom_band_5);
4620
4621         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4622
4623         priv->channel_info = kzalloc(sizeof(struct iwl3945_channel_info) *
4624                                      priv->channel_count, GFP_KERNEL);
4625         if (!priv->channel_info) {
4626                 IWL_ERROR("Could not allocate channel_info\n");
4627                 priv->channel_count = 0;
4628                 return -ENOMEM;
4629         }
4630
4631         ch_info = priv->channel_info;
4632
4633         /* Loop through the 5 EEPROM bands adding them in order to the
4634          * channel map we maintain (that contains additional information than
4635          * what just in the EEPROM) */
4636         for (band = 1; band <= 5; band++) {
4637
4638                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4639                                         &eeprom_ch_info, &eeprom_ch_index);
4640
4641                 /* Loop through each band adding each of the channels */
4642                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4643                         ch_info->channel = eeprom_ch_index[ch];
4644                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4645                             IEEE80211_BAND_5GHZ;
4646
4647                         /* permanently store EEPROM's channel regulatory flags
4648                          *   and max power in channel info database. */
4649                         ch_info->eeprom = eeprom_ch_info[ch];
4650
4651                         /* Copy the run-time flags so they are there even on
4652                          * invalid channels */
4653                         ch_info->flags = eeprom_ch_info[ch].flags;
4654
4655                         if (!(is_channel_valid(ch_info))) {
4656                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4657                                                "No traffic\n",
4658                                                ch_info->channel,
4659                                                ch_info->flags,
4660                                                is_channel_a_band(ch_info) ?
4661                                                "5.2" : "2.4");
4662                                 ch_info++;
4663                                 continue;
4664                         }
4665
4666                         /* Initialize regulatory-based run-time data */
4667                         ch_info->max_power_avg = ch_info->curr_txpow =
4668                             eeprom_ch_info[ch].max_power_avg;
4669                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4670                         ch_info->min_power = 0;
4671
4672                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
4673                                        " %ddBm): Ad-Hoc %ssupported\n",
4674                                        ch_info->channel,
4675                                        is_channel_a_band(ch_info) ?
4676                                        "5.2" : "2.4",
4677                                        CHECK_AND_PRINT(VALID),
4678                                        CHECK_AND_PRINT(IBSS),
4679                                        CHECK_AND_PRINT(ACTIVE),
4680                                        CHECK_AND_PRINT(RADAR),
4681                                        CHECK_AND_PRINT(WIDE),
4682                                        CHECK_AND_PRINT(DFS),
4683                                        eeprom_ch_info[ch].flags,
4684                                        eeprom_ch_info[ch].max_power_avg,
4685                                        ((eeprom_ch_info[ch].
4686                                          flags & EEPROM_CHANNEL_IBSS)
4687                                         && !(eeprom_ch_info[ch].
4688                                              flags & EEPROM_CHANNEL_RADAR))
4689                                        ? "" : "not ");
4690
4691                         /* Set the user_txpower_limit to the highest power
4692                          * supported by any channel */
4693                         if (eeprom_ch_info[ch].max_power_avg >
4694                             priv->user_txpower_limit)
4695                                 priv->user_txpower_limit =
4696                                     eeprom_ch_info[ch].max_power_avg;
4697
4698                         ch_info++;
4699                 }
4700         }
4701
4702         /* Set up txpower settings in driver for all channels */
4703         if (iwl3945_txpower_set_from_eeprom(priv))
4704                 return -EIO;
4705
4706         return 0;
4707 }
4708
4709 /*
4710  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4711  */
4712 static void iwl3945_free_channel_map(struct iwl3945_priv *priv)
4713 {
4714         kfree(priv->channel_info);
4715         priv->channel_count = 0;
4716 }
4717
4718 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4719  * sending probe req.  This should be set long enough to hear probe responses
4720  * from more than one AP.  */
4721 #define IWL_ACTIVE_DWELL_TIME_24    (30)        /* all times in msec */
4722 #define IWL_ACTIVE_DWELL_TIME_52    (20)
4723
4724 #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
4725 #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
4726
4727 /* For faster active scanning, scan will move to the next channel if fewer than
4728  * PLCP_QUIET_THRESH packets are heard on this channel within
4729  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4730  * time if it's a quiet channel (nothing responded to our probe, and there's
4731  * no other traffic).
4732  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4733 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4734 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(10)  /* msec */
4735
4736 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4737  * Must be set longer than active dwell time.
4738  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4739 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4740 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4741 #define IWL_PASSIVE_DWELL_BASE      (100)
4742 #define IWL_CHANNEL_TUNE_TIME       5
4743
4744 #define IWL_SCAN_PROBE_MASK(n)   cpu_to_le32((BIT(n) | (BIT(n) - BIT(1))))
4745
4746 static inline u16 iwl3945_get_active_dwell_time(struct iwl3945_priv *priv,
4747                                                 enum ieee80211_band band,
4748                                                 u8 n_probes)
4749 {
4750         if (band == IEEE80211_BAND_5GHZ)
4751                 return IWL_ACTIVE_DWELL_TIME_52 +
4752                         IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
4753         else
4754                 return IWL_ACTIVE_DWELL_TIME_24 +
4755                         IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
4756 }
4757
4758 static u16 iwl3945_get_passive_dwell_time(struct iwl3945_priv *priv,
4759                                           enum ieee80211_band band)
4760 {
4761         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4762             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4763             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4764
4765         if (iwl3945_is_associated(priv)) {
4766                 /* If we're associated, we clamp the maximum passive
4767                  * dwell time to be 98% of the beacon interval (minus
4768                  * 2 * channel tune time) */
4769                 passive = priv->beacon_int;
4770                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4771                         passive = IWL_PASSIVE_DWELL_BASE;
4772                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4773         }
4774
4775         return passive;
4776 }
4777
4778 static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv,
4779                                          enum ieee80211_band band,
4780                                      u8 is_active, u8 n_probes,
4781                                      struct iwl3945_scan_channel *scan_ch)
4782 {
4783         const struct ieee80211_channel *channels = NULL;
4784         const struct ieee80211_supported_band *sband;
4785         const struct iwl3945_channel_info *ch_info;
4786         u16 passive_dwell = 0;
4787         u16 active_dwell = 0;
4788         int added, i;
4789
4790         sband = iwl3945_get_band(priv, band);
4791         if (!sband)
4792                 return 0;
4793
4794         channels = sband->channels;
4795
4796         active_dwell = iwl3945_get_active_dwell_time(priv, band, n_probes);
4797         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4798
4799         if (passive_dwell <= active_dwell)
4800                 passive_dwell = active_dwell + 1;
4801
4802         for (i = 0, added = 0; i < sband->n_channels; i++) {
4803                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4804                         continue;
4805
4806                 scan_ch->channel = channels[i].hw_value;
4807
4808                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4809                 if (!is_channel_valid(ch_info)) {
4810                         IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
4811                                        scan_ch->channel);
4812                         continue;
4813                 }
4814
4815                 if (!is_active || is_channel_passive(ch_info) ||
4816                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4817                         scan_ch->type = 0;      /* passive */
4818                 else
4819                         scan_ch->type = 1;      /* active */
4820
4821                 if ((scan_ch->type & 1) && n_probes)
4822                         scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4823
4824                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4825                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4826
4827                 /* Set txpower levels to defaults */
4828                 scan_ch->tpc.dsp_atten = 110;
4829                 /* scan_pwr_info->tpc.dsp_atten; */
4830
4831                 /*scan_pwr_info->tpc.tx_gain; */
4832                 if (band == IEEE80211_BAND_5GHZ)
4833                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4834                 else {
4835                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4836                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4837                          * power level:
4838                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4839                          */
4840                 }
4841
4842                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4843                                scan_ch->channel,
4844                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4845                                (scan_ch->type & 1) ?
4846                                active_dwell : passive_dwell);
4847
4848                 scan_ch++;
4849                 added++;
4850         }
4851
4852         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4853         return added;
4854 }
4855
4856 static void iwl3945_init_hw_rates(struct iwl3945_priv *priv,
4857                               struct ieee80211_rate *rates)
4858 {
4859         int i;
4860
4861         for (i = 0; i < IWL_RATE_COUNT; i++) {
4862                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
4863                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4864                 rates[i].hw_value_short = i;
4865                 rates[i].flags = 0;
4866                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4867                         /*
4868                          * If CCK != 1M then set short preamble rate flag.
4869                          */
4870                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
4871                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4872                 }
4873         }
4874 }
4875
4876 /**
4877  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
4878  */
4879 static int iwl3945_init_geos(struct iwl3945_priv *priv)
4880 {
4881         struct iwl3945_channel_info *ch;
4882         struct ieee80211_supported_band *sband;
4883         struct ieee80211_channel *channels;
4884         struct ieee80211_channel *geo_ch;
4885         struct ieee80211_rate *rates;
4886         int i = 0;
4887
4888         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4889             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4890                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4891                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4892                 return 0;
4893         }
4894
4895         channels = kzalloc(sizeof(struct ieee80211_channel) *
4896                            priv->channel_count, GFP_KERNEL);
4897         if (!channels)
4898                 return -ENOMEM;
4899
4900         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4901                         GFP_KERNEL);
4902         if (!rates) {
4903                 kfree(channels);
4904                 return -ENOMEM;
4905         }
4906
4907         /* 5.2GHz channels start after the 2.4GHz channels */
4908         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4909         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
4910         /* just OFDM */
4911         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4912         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4913
4914         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4915         sband->channels = channels;
4916         /* OFDM & CCK */
4917         sband->bitrates = rates;
4918         sband->n_bitrates = IWL_RATE_COUNT;
4919
4920         priv->ieee_channels = channels;
4921         priv->ieee_rates = rates;
4922
4923         iwl3945_init_hw_rates(priv, rates);
4924
4925         for (i = 0;  i < priv->channel_count; i++) {
4926                 ch = &priv->channel_info[i];
4927
4928                 /* FIXME: might be removed if scan is OK*/
4929                 if (!is_channel_valid(ch))
4930                         continue;
4931
4932                 if (is_channel_a_band(ch))
4933                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4934                 else
4935                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4936
4937                 geo_ch = &sband->channels[sband->n_channels++];
4938
4939                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4940                 geo_ch->max_power = ch->max_power_avg;
4941                 geo_ch->max_antenna_gain = 0xff;
4942                 geo_ch->hw_value = ch->channel;
4943
4944                 if (is_channel_valid(ch)) {
4945                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4946                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4947
4948                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4949                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4950
4951                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4952                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4953
4954                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4955                                 priv->max_channel_txpower_limit =
4956                                     ch->max_power_avg;
4957                 } else {
4958                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4959                 }
4960
4961                 /* Save flags for reg domain usage */
4962                 geo_ch->orig_flags = geo_ch->flags;
4963
4964                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4965                                 ch->channel, geo_ch->center_freq,
4966                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4967                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4968                                 "restricted" : "valid",
4969                                  geo_ch->flags);
4970         }
4971
4972         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4973              priv->cfg->sku & IWL_SKU_A) {
4974                 printk(KERN_INFO DRV_NAME
4975                        ": Incorrectly detected BG card as ABG.  Please send "
4976                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4977                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4978                  priv->cfg->sku &= ~IWL_SKU_A;
4979         }
4980
4981         printk(KERN_INFO DRV_NAME
4982                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4983                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4984                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4985
4986         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4987                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4988                         &priv->bands[IEEE80211_BAND_2GHZ];
4989         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4990                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4991                         &priv->bands[IEEE80211_BAND_5GHZ];
4992
4993         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4994
4995         return 0;
4996 }
4997
4998 /*
4999  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
5000  */
5001 static void iwl3945_free_geos(struct iwl3945_priv *priv)
5002 {
5003         kfree(priv->ieee_channels);
5004         kfree(priv->ieee_rates);
5005         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5006 }
5007
5008 /******************************************************************************
5009  *
5010  * uCode download functions
5011  *
5012  ******************************************************************************/
5013
5014 static void iwl3945_dealloc_ucode_pci(struct iwl3945_priv *priv)
5015 {
5016         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5017         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5018         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5019         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5020         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5021         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5022 }
5023
5024 /**
5025  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
5026  *     looking at all data.
5027  */
5028 static int iwl3945_verify_inst_full(struct iwl3945_priv *priv, __le32 *image, u32 len)
5029 {
5030         u32 val;
5031         u32 save_len = len;
5032         int rc = 0;
5033         u32 errcnt;
5034
5035         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5036
5037         rc = iwl3945_grab_nic_access(priv);
5038         if (rc)
5039                 return rc;
5040
5041         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5042
5043         errcnt = 0;
5044         for (; len > 0; len -= sizeof(u32), image++) {
5045                 /* read data comes through single port, auto-incr addr */
5046                 /* NOTE: Use the debugless read so we don't flood kernel log
5047                  * if IWL_DL_IO is set */
5048                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5049                 if (val != le32_to_cpu(*image)) {
5050                         IWL_ERROR("uCode INST section is invalid at "
5051                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5052                                   save_len - len, val, le32_to_cpu(*image));
5053                         rc = -EIO;
5054                         errcnt++;
5055                         if (errcnt >= 20)
5056                                 break;
5057                 }
5058         }
5059
5060         iwl3945_release_nic_access(priv);
5061
5062         if (!errcnt)
5063                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
5064
5065         return rc;
5066 }
5067
5068
5069 /**
5070  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
5071  *   using sample data 100 bytes apart.  If these sample points are good,
5072  *   it's a pretty good bet that everything between them is good, too.
5073  */
5074 static int iwl3945_verify_inst_sparse(struct iwl3945_priv *priv, __le32 *image, u32 len)
5075 {
5076         u32 val;
5077         int rc = 0;
5078         u32 errcnt = 0;
5079         u32 i;
5080
5081         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5082
5083         rc = iwl3945_grab_nic_access(priv);
5084         if (rc)
5085                 return rc;
5086
5087         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5088                 /* read data comes through single port, auto-incr addr */
5089                 /* NOTE: Use the debugless read so we don't flood kernel log
5090                  * if IWL_DL_IO is set */
5091                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5092                         i + RTC_INST_LOWER_BOUND);
5093                 val = _iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5094                 if (val != le32_to_cpu(*image)) {
5095 #if 0 /* Enable this if you want to see details */
5096                         IWL_ERROR("uCode INST section is invalid at "
5097                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5098                                   i, val, *image);
5099 #endif
5100                         rc = -EIO;
5101                         errcnt++;
5102                         if (errcnt >= 3)
5103                                 break;
5104                 }
5105         }
5106
5107         iwl3945_release_nic_access(priv);
5108
5109         return rc;
5110 }
5111
5112
5113 /**
5114  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5115  *    and verify its contents
5116  */
5117 static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
5118 {
5119         __le32 *image;
5120         u32 len;
5121         int rc = 0;
5122
5123         /* Try bootstrap */
5124         image = (__le32 *)priv->ucode_boot.v_addr;
5125         len = priv->ucode_boot.len;
5126         rc = iwl3945_verify_inst_sparse(priv, image, len);
5127         if (rc == 0) {
5128                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5129                 return 0;
5130         }
5131
5132         /* Try initialize */
5133         image = (__le32 *)priv->ucode_init.v_addr;
5134         len = priv->ucode_init.len;
5135         rc = iwl3945_verify_inst_sparse(priv, image, len);
5136         if (rc == 0) {
5137                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5138                 return 0;
5139         }
5140
5141         /* Try runtime/protocol */
5142         image = (__le32 *)priv->ucode_code.v_addr;
5143         len = priv->ucode_code.len;
5144         rc = iwl3945_verify_inst_sparse(priv, image, len);
5145         if (rc == 0) {
5146                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5147                 return 0;
5148         }
5149
5150         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5151
5152         /* Since nothing seems to match, show first several data entries in
5153          * instruction SRAM, so maybe visual inspection will give a clue.
5154          * Selection of bootstrap image (vs. other images) is arbitrary. */
5155         image = (__le32 *)priv->ucode_boot.v_addr;
5156         len = priv->ucode_boot.len;
5157         rc = iwl3945_verify_inst_full(priv, image, len);
5158
5159         return rc;
5160 }
5161
5162
5163 /* check contents of special bootstrap uCode SRAM */
5164 static int iwl3945_verify_bsm(struct iwl3945_priv *priv)
5165 {
5166         __le32 *image = priv->ucode_boot.v_addr;
5167         u32 len = priv->ucode_boot.len;
5168         u32 reg;
5169         u32 val;
5170
5171         IWL_DEBUG_INFO("Begin verify bsm\n");
5172
5173         /* verify BSM SRAM contents */
5174         val = iwl3945_read_prph(priv, BSM_WR_DWCOUNT_REG);
5175         for (reg = BSM_SRAM_LOWER_BOUND;
5176              reg < BSM_SRAM_LOWER_BOUND + len;
5177              reg += sizeof(u32), image++) {
5178                 val = iwl3945_read_prph(priv, reg);
5179                 if (val != le32_to_cpu(*image)) {
5180                         IWL_ERROR("BSM uCode verification failed at "
5181                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5182                                   BSM_SRAM_LOWER_BOUND,
5183                                   reg - BSM_SRAM_LOWER_BOUND, len,
5184                                   val, le32_to_cpu(*image));
5185                         return -EIO;
5186                 }
5187         }
5188
5189         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5190
5191         return 0;
5192 }
5193
5194 /**
5195  * iwl3945_load_bsm - Load bootstrap instructions
5196  *
5197  * BSM operation:
5198  *
5199  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5200  * in special SRAM that does not power down during RFKILL.  When powering back
5201  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5202  * the bootstrap program into the on-board processor, and starts it.
5203  *
5204  * The bootstrap program loads (via DMA) instructions and data for a new
5205  * program from host DRAM locations indicated by the host driver in the
5206  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5207  * automatically.
5208  *
5209  * When initializing the NIC, the host driver points the BSM to the
5210  * "initialize" uCode image.  This uCode sets up some internal data, then
5211  * notifies host via "initialize alive" that it is complete.
5212  *
5213  * The host then replaces the BSM_DRAM_* pointer values to point to the
5214  * normal runtime uCode instructions and a backup uCode data cache buffer
5215  * (filled initially with starting data values for the on-board processor),
5216  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5217  * which begins normal operation.
5218  *
5219  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5220  * the backup data cache in DRAM before SRAM is powered down.
5221  *
5222  * When powering back up, the BSM loads the bootstrap program.  This reloads
5223  * the runtime uCode instructions and the backup data cache into SRAM,
5224  * and re-launches the runtime uCode from where it left off.
5225  */
5226 static int iwl3945_load_bsm(struct iwl3945_priv *priv)
5227 {
5228         __le32 *image = priv->ucode_boot.v_addr;
5229         u32 len = priv->ucode_boot.len;
5230         dma_addr_t pinst;
5231         dma_addr_t pdata;
5232         u32 inst_len;
5233         u32 data_len;
5234         int rc;
5235         int i;
5236         u32 done;
5237         u32 reg_offset;
5238
5239         IWL_DEBUG_INFO("Begin load bsm\n");
5240
5241         /* make sure bootstrap program is no larger than BSM's SRAM size */
5242         if (len > IWL_MAX_BSM_SIZE)
5243                 return -EINVAL;
5244
5245         /* Tell bootstrap uCode where to find the "Initialize" uCode
5246          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5247          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5248          *        after the "initialize" uCode has run, to point to
5249          *        runtime/protocol instructions and backup data cache. */
5250         pinst = priv->ucode_init.p_addr;
5251         pdata = priv->ucode_init_data.p_addr;
5252         inst_len = priv->ucode_init.len;
5253         data_len = priv->ucode_init_data.len;
5254
5255         rc = iwl3945_grab_nic_access(priv);
5256         if (rc)
5257                 return rc;
5258
5259         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5260         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5261         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5262         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5263
5264         /* Fill BSM memory with bootstrap instructions */
5265         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5266              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5267              reg_offset += sizeof(u32), image++)
5268                 _iwl3945_write_prph(priv, reg_offset,
5269                                           le32_to_cpu(*image));
5270
5271         rc = iwl3945_verify_bsm(priv);
5272         if (rc) {
5273                 iwl3945_release_nic_access(priv);
5274                 return rc;
5275         }
5276
5277         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5278         iwl3945_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5279         iwl3945_write_prph(priv, BSM_WR_MEM_DST_REG,
5280                                  RTC_INST_LOWER_BOUND);
5281         iwl3945_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5282
5283         /* Load bootstrap code into instruction SRAM now,
5284          *   to prepare to load "initialize" uCode */
5285         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5286                 BSM_WR_CTRL_REG_BIT_START);
5287
5288         /* Wait for load of bootstrap uCode to finish */
5289         for (i = 0; i < 100; i++) {
5290                 done = iwl3945_read_prph(priv, BSM_WR_CTRL_REG);
5291                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5292                         break;
5293                 udelay(10);
5294         }
5295         if (i < 100)
5296                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5297         else {
5298                 IWL_ERROR("BSM write did not complete!\n");
5299                 return -EIO;
5300         }
5301
5302         /* Enable future boot loads whenever power management unit triggers it
5303          *   (e.g. when powering back up after power-save shutdown) */
5304         iwl3945_write_prph(priv, BSM_WR_CTRL_REG,
5305                 BSM_WR_CTRL_REG_BIT_START_EN);
5306
5307         iwl3945_release_nic_access(priv);
5308
5309         return 0;
5310 }
5311
5312 static void iwl3945_nic_start(struct iwl3945_priv *priv)
5313 {
5314         /* Remove all resets to allow NIC to operate */
5315         iwl3945_write32(priv, CSR_RESET, 0);
5316 }
5317
5318 /**
5319  * iwl3945_read_ucode - Read uCode images from disk file.
5320  *
5321  * Copy into buffers for card to fetch via bus-mastering
5322  */
5323 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
5324 {
5325         struct iwl3945_ucode *ucode;
5326         int ret = 0;
5327         const struct firmware *ucode_raw;
5328         /* firmware file name contains uCode/driver compatibility version */
5329         const char *name = priv->cfg->fw_name;
5330         u8 *src;
5331         size_t len;
5332         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5333
5334         /* Ask kernel firmware_class module to get the boot firmware off disk.
5335          * request_firmware() is synchronous, file is in memory on return. */
5336         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5337         if (ret < 0) {
5338                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5339                                 name, ret);
5340                 goto error;
5341         }
5342
5343         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5344                        name, ucode_raw->size);
5345
5346         /* Make sure that we got at least our header! */
5347         if (ucode_raw->size < sizeof(*ucode)) {
5348                 IWL_ERROR("File size way too small!\n");
5349                 ret = -EINVAL;
5350                 goto err_release;
5351         }
5352
5353         /* Data from ucode file:  header followed by uCode images */
5354         ucode = (void *)ucode_raw->data;
5355
5356         ver = le32_to_cpu(ucode->ver);
5357         inst_size = le32_to_cpu(ucode->inst_size);
5358         data_size = le32_to_cpu(ucode->data_size);
5359         init_size = le32_to_cpu(ucode->init_size);
5360         init_data_size = le32_to_cpu(ucode->init_data_size);
5361         boot_size = le32_to_cpu(ucode->boot_size);
5362
5363         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5364         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5365         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5366         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5367         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5368         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5369
5370         /* Verify size of file vs. image size info in file's header */
5371         if (ucode_raw->size < sizeof(*ucode) +
5372                 inst_size + data_size + init_size +
5373                 init_data_size + boot_size) {
5374
5375                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5376                                (int)ucode_raw->size);
5377                 ret = -EINVAL;
5378                 goto err_release;
5379         }
5380
5381         /* Verify that uCode images will fit in card's SRAM */
5382         if (inst_size > IWL_MAX_INST_SIZE) {
5383                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5384                                inst_size);
5385                 ret = -EINVAL;
5386                 goto err_release;
5387         }
5388
5389         if (data_size > IWL_MAX_DATA_SIZE) {
5390                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5391                                data_size);
5392                 ret = -EINVAL;
5393                 goto err_release;
5394         }
5395         if (init_size > IWL_MAX_INST_SIZE) {
5396                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5397                                 init_size);
5398                 ret = -EINVAL;
5399                 goto err_release;
5400         }
5401         if (init_data_size > IWL_MAX_DATA_SIZE) {
5402                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5403                                 init_data_size);
5404                 ret = -EINVAL;
5405                 goto err_release;
5406         }
5407         if (boot_size > IWL_MAX_BSM_SIZE) {
5408                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5409                                 boot_size);
5410                 ret = -EINVAL;
5411                 goto err_release;
5412         }
5413
5414         /* Allocate ucode buffers for card's bus-master loading ... */
5415
5416         /* Runtime instructions and 2 copies of data:
5417          * 1) unmodified from disk
5418          * 2) backup cache for save/restore during power-downs */
5419         priv->ucode_code.len = inst_size;
5420         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5421
5422         priv->ucode_data.len = data_size;
5423         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5424
5425         priv->ucode_data_backup.len = data_size;
5426         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5427
5428         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5429             !priv->ucode_data_backup.v_addr)
5430                 goto err_pci_alloc;
5431
5432         /* Initialization instructions and data */
5433         if (init_size && init_data_size) {
5434                 priv->ucode_init.len = init_size;
5435                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5436
5437                 priv->ucode_init_data.len = init_data_size;
5438                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5439
5440                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5441                         goto err_pci_alloc;
5442         }
5443
5444         /* Bootstrap (instructions only, no data) */
5445         if (boot_size) {
5446                 priv->ucode_boot.len = boot_size;
5447                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5448
5449                 if (!priv->ucode_boot.v_addr)
5450                         goto err_pci_alloc;
5451         }
5452
5453         /* Copy images into buffers for card's bus-master reads ... */
5454
5455         /* Runtime instructions (first block of data in file) */
5456         src = &ucode->data[0];
5457         len = priv->ucode_code.len;
5458         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5459         memcpy(priv->ucode_code.v_addr, src, len);
5460         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5461                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5462
5463         /* Runtime data (2nd block)
5464          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5465         src = &ucode->data[inst_size];
5466         len = priv->ucode_data.len;
5467         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5468         memcpy(priv->ucode_data.v_addr, src, len);
5469         memcpy(priv->ucode_data_backup.v_addr, src, len);
5470
5471         /* Initialization instructions (3rd block) */
5472         if (init_size) {
5473                 src = &ucode->data[inst_size + data_size];
5474                 len = priv->ucode_init.len;
5475                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5476                                len);
5477                 memcpy(priv->ucode_init.v_addr, src, len);
5478         }
5479
5480         /* Initialization data (4th block) */
5481         if (init_data_size) {
5482                 src = &ucode->data[inst_size + data_size + init_size];
5483                 len = priv->ucode_init_data.len;
5484                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5485                                (int)len);
5486                 memcpy(priv->ucode_init_data.v_addr, src, len);
5487         }
5488
5489         /* Bootstrap instructions (5th block) */
5490         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5491         len = priv->ucode_boot.len;
5492         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5493                        (int)len);
5494         memcpy(priv->ucode_boot.v_addr, src, len);
5495
5496         /* We have our copies now, allow OS release its copies */
5497         release_firmware(ucode_raw);
5498         return 0;
5499
5500  err_pci_alloc:
5501         IWL_ERROR("failed to allocate pci memory\n");
5502         ret = -ENOMEM;
5503         iwl3945_dealloc_ucode_pci(priv);
5504
5505  err_release:
5506         release_firmware(ucode_raw);
5507
5508  error:
5509         return ret;
5510 }
5511
5512
5513 /**
5514  * iwl3945_set_ucode_ptrs - Set uCode address location
5515  *
5516  * Tell initialization uCode where to find runtime uCode.
5517  *
5518  * BSM registers initially contain pointers to initialization uCode.
5519  * We need to replace them to load runtime uCode inst and data,
5520  * and to save runtime data when powering down.
5521  */
5522 static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
5523 {
5524         dma_addr_t pinst;
5525         dma_addr_t pdata;
5526         int rc = 0;
5527         unsigned long flags;
5528
5529         /* bits 31:0 for 3945 */
5530         pinst = priv->ucode_code.p_addr;
5531         pdata = priv->ucode_data_backup.p_addr;
5532
5533         spin_lock_irqsave(&priv->lock, flags);
5534         rc = iwl3945_grab_nic_access(priv);
5535         if (rc) {
5536                 spin_unlock_irqrestore(&priv->lock, flags);
5537                 return rc;
5538         }
5539
5540         /* Tell bootstrap uCode where to find image to load */
5541         iwl3945_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5542         iwl3945_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5543         iwl3945_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5544                                  priv->ucode_data.len);
5545
5546         /* Inst byte count must be last to set up, bit 31 signals uCode
5547          *   that all new ptr/size info is in place */
5548         iwl3945_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5549                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5550
5551         iwl3945_release_nic_access(priv);
5552
5553         spin_unlock_irqrestore(&priv->lock, flags);
5554
5555         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5556
5557         return rc;
5558 }
5559
5560 /**
5561  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5562  *
5563  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5564  *
5565  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5566  */
5567 static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
5568 {
5569         /* Check alive response for "valid" sign from uCode */
5570         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5571                 /* We had an error bringing up the hardware, so take it
5572                  * all the way back down so we can try again */
5573                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5574                 goto restart;
5575         }
5576
5577         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5578          * This is a paranoid check, because we would not have gotten the
5579          * "initialize" alive if code weren't properly loaded.  */
5580         if (iwl3945_verify_ucode(priv)) {
5581                 /* Runtime instruction load was bad;
5582                  * take it all the way back down so we can try again */
5583                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5584                 goto restart;
5585         }
5586
5587         /* Send pointers to protocol/runtime uCode image ... init code will
5588          * load and launch runtime uCode, which will send us another "Alive"
5589          * notification. */
5590         IWL_DEBUG_INFO("Initialization Alive received.\n");
5591         if (iwl3945_set_ucode_ptrs(priv)) {
5592                 /* Runtime instruction load won't happen;
5593                  * take it all the way back down so we can try again */
5594                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5595                 goto restart;
5596         }
5597         return;
5598
5599  restart:
5600         queue_work(priv->workqueue, &priv->restart);
5601 }
5602
5603
5604 /* temporary */
5605 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw,
5606                                      struct sk_buff *skb);
5607
5608 /**
5609  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5610  *                   from protocol/runtime uCode (initialization uCode's
5611  *                   Alive gets handled by iwl3945_init_alive_start()).
5612  */
5613 static void iwl3945_alive_start(struct iwl3945_priv *priv)
5614 {
5615         int rc = 0;
5616         int thermal_spin = 0;
5617         u32 rfkill;
5618
5619         IWL_DEBUG_INFO("Runtime Alive received.\n");
5620
5621         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5622                 /* We had an error bringing up the hardware, so take it
5623                  * all the way back down so we can try again */
5624                 IWL_DEBUG_INFO("Alive failed.\n");
5625                 goto restart;
5626         }
5627
5628         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5629          * This is a paranoid check, because we would not have gotten the
5630          * "runtime" alive if code weren't properly loaded.  */
5631         if (iwl3945_verify_ucode(priv)) {
5632                 /* Runtime instruction load was bad;
5633                  * take it all the way back down so we can try again */
5634                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5635                 goto restart;
5636         }
5637
5638         iwl3945_clear_stations_table(priv);
5639
5640         rc = iwl3945_grab_nic_access(priv);
5641         if (rc) {
5642                 IWL_WARNING("Can not read RFKILL status from adapter\n");
5643                 return;
5644         }
5645
5646         rfkill = iwl3945_read_prph(priv, APMG_RFKILL_REG);
5647         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5648         iwl3945_release_nic_access(priv);
5649
5650         if (rfkill & 0x1) {
5651                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5652                 /* if RFKILL is not on, then wait for thermal
5653                  * sensor in adapter to kick in */
5654                 while (iwl3945_hw_get_temperature(priv) == 0) {
5655                         thermal_spin++;
5656                         udelay(10);
5657                 }
5658
5659                 if (thermal_spin)
5660                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5661                                        thermal_spin * 10);
5662         } else
5663                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5664
5665         /* After the ALIVE response, we can send commands to 3945 uCode */
5666         set_bit(STATUS_ALIVE, &priv->status);
5667
5668         /* Clear out the uCode error bit if it is set */
5669         clear_bit(STATUS_FW_ERROR, &priv->status);
5670
5671         if (iwl3945_is_rfkill(priv))
5672                 return;
5673
5674         ieee80211_wake_queues(priv->hw);
5675
5676         priv->active_rate = priv->rates_mask;
5677         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5678
5679         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5680
5681         if (iwl3945_is_associated(priv)) {
5682                 struct iwl3945_rxon_cmd *active_rxon =
5683                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
5684
5685                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5686                        sizeof(priv->staging_rxon));
5687                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5688         } else {
5689                 /* Initialize our rx_config data */
5690                 iwl3945_connection_init_rx_config(priv, priv->iw_mode);
5691                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5692         }
5693
5694         /* Configure Bluetooth device coexistence support */
5695         iwl3945_send_bt_config(priv);
5696
5697         /* Configure the adapter for unassociated operation */
5698         iwl3945_commit_rxon(priv);
5699
5700         iwl3945_reg_txpower_periodic(priv);
5701
5702         iwl3945_led_register(priv);
5703
5704         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5705         set_bit(STATUS_READY, &priv->status);
5706         wake_up_interruptible(&priv->wait_command_queue);
5707
5708         if (priv->error_recovering)
5709                 iwl3945_error_recovery(priv);
5710
5711         /* reassociate for ADHOC mode */
5712         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
5713                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
5714                                                                 priv->vif);
5715                 if (beacon)
5716                         iwl3945_mac_beacon_update(priv->hw, beacon);
5717         }
5718
5719         return;
5720
5721  restart:
5722         queue_work(priv->workqueue, &priv->restart);
5723 }
5724
5725 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv);
5726
5727 static void __iwl3945_down(struct iwl3945_priv *priv)
5728 {
5729         unsigned long flags;
5730         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5731         struct ieee80211_conf *conf = NULL;
5732
5733         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5734
5735         conf = ieee80211_get_hw_conf(priv->hw);
5736
5737         if (!exit_pending)
5738                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5739
5740         iwl3945_led_unregister(priv);
5741         iwl3945_clear_stations_table(priv);
5742
5743         /* Unblock any waiting calls */
5744         wake_up_interruptible_all(&priv->wait_command_queue);
5745
5746         /* Wipe out the EXIT_PENDING status bit if we are not actually
5747          * exiting the module */
5748         if (!exit_pending)
5749                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5750
5751         /* stop and reset the on-board processor */
5752         iwl3945_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5753
5754         /* tell the device to stop sending interrupts */
5755         spin_lock_irqsave(&priv->lock, flags);
5756         iwl3945_disable_interrupts(priv);
5757         spin_unlock_irqrestore(&priv->lock, flags);
5758         iwl_synchronize_irq(priv);
5759
5760         if (priv->mac80211_registered)
5761                 ieee80211_stop_queues(priv->hw);
5762
5763         /* If we have not previously called iwl3945_init() then
5764          * clear all bits but the RF Kill and SUSPEND bits and return */
5765         if (!iwl3945_is_init(priv)) {
5766                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5767                                         STATUS_RF_KILL_HW |
5768                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5769                                         STATUS_RF_KILL_SW |
5770                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5771                                         STATUS_GEO_CONFIGURED |
5772                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5773                                         STATUS_IN_SUSPEND |
5774                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5775                                         STATUS_EXIT_PENDING;
5776                 goto exit;
5777         }
5778
5779         /* ...otherwise clear out all the status bits but the RF Kill and
5780          * SUSPEND bits and continue taking the NIC down. */
5781         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5782                                 STATUS_RF_KILL_HW |
5783                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5784                                 STATUS_RF_KILL_SW |
5785                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5786                                 STATUS_GEO_CONFIGURED |
5787                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5788                                 STATUS_IN_SUSPEND |
5789                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5790                                 STATUS_FW_ERROR |
5791                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5792                                 STATUS_EXIT_PENDING;
5793
5794         spin_lock_irqsave(&priv->lock, flags);
5795         iwl3945_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5796         spin_unlock_irqrestore(&priv->lock, flags);
5797
5798         iwl3945_hw_txq_ctx_stop(priv);
5799         iwl3945_hw_rxq_stop(priv);
5800
5801         spin_lock_irqsave(&priv->lock, flags);
5802         if (!iwl3945_grab_nic_access(priv)) {
5803                 iwl3945_write_prph(priv, APMG_CLK_DIS_REG,
5804                                          APMG_CLK_VAL_DMA_CLK_RQT);
5805                 iwl3945_release_nic_access(priv);
5806         }
5807         spin_unlock_irqrestore(&priv->lock, flags);
5808
5809         udelay(5);
5810
5811         iwl3945_hw_nic_stop_master(priv);
5812         iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5813         iwl3945_hw_nic_reset(priv);
5814
5815  exit:
5816         memset(&priv->card_alive, 0, sizeof(struct iwl3945_alive_resp));
5817
5818         if (priv->ibss_beacon)
5819                 dev_kfree_skb(priv->ibss_beacon);
5820         priv->ibss_beacon = NULL;
5821
5822         /* clear out any free frames */
5823         iwl3945_clear_free_frames(priv);
5824 }
5825
5826 static void iwl3945_down(struct iwl3945_priv *priv)
5827 {
5828         mutex_lock(&priv->mutex);
5829         __iwl3945_down(priv);
5830         mutex_unlock(&priv->mutex);
5831
5832         iwl3945_cancel_deferred_work(priv);
5833 }
5834
5835 #define MAX_HW_RESTARTS 5
5836
5837 static int __iwl3945_up(struct iwl3945_priv *priv)
5838 {
5839         int rc, i;
5840
5841         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5842                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5843                 return -EIO;
5844         }
5845
5846         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5847                 IWL_WARNING("Radio disabled by SW RF kill (module "
5848                             "parameter)\n");
5849                 return -ENODEV;
5850         }
5851
5852         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5853                 IWL_ERROR("ucode not available for device bring up\n");
5854                 return -EIO;
5855         }
5856
5857         /* If platform's RF_KILL switch is NOT set to KILL */
5858         if (iwl3945_read32(priv, CSR_GP_CNTRL) &
5859                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5860                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5861         else {
5862                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5863                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5864                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5865                         return -ENODEV;
5866                 }
5867         }
5868
5869         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5870
5871         rc = iwl3945_hw_nic_init(priv);
5872         if (rc) {
5873                 IWL_ERROR("Unable to int nic\n");
5874                 return rc;
5875         }
5876
5877         /* make sure rfkill handshake bits are cleared */
5878         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5879         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5880                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5881
5882         /* clear (again), then enable host interrupts */
5883         iwl3945_write32(priv, CSR_INT, 0xFFFFFFFF);
5884         iwl3945_enable_interrupts(priv);
5885
5886         /* really make sure rfkill handshake bits are cleared */
5887         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5888         iwl3945_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5889
5890         /* Copy original ucode data image from disk into backup cache.
5891          * This will be used to initialize the on-board processor's
5892          * data SRAM for a clean start when the runtime program first loads. */
5893         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5894                priv->ucode_data.len);
5895
5896         /* We return success when we resume from suspend and rf_kill is on. */
5897         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5898                 return 0;
5899
5900         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5901
5902                 iwl3945_clear_stations_table(priv);
5903
5904                 /* load bootstrap state machine,
5905                  * load bootstrap program into processor's memory,
5906                  * prepare to load the "initialize" uCode */
5907                 rc = iwl3945_load_bsm(priv);
5908
5909                 if (rc) {
5910                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
5911                         continue;
5912                 }
5913
5914                 /* start card; "initialize" will load runtime ucode */
5915                 iwl3945_nic_start(priv);
5916
5917                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5918
5919                 return 0;
5920         }
5921
5922         set_bit(STATUS_EXIT_PENDING, &priv->status);
5923         __iwl3945_down(priv);
5924         clear_bit(STATUS_EXIT_PENDING, &priv->status);
5925
5926         /* tried to restart and config the device for as long as our
5927          * patience could withstand */
5928         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5929         return -EIO;
5930 }
5931
5932
5933 /*****************************************************************************
5934  *
5935  * Workqueue callbacks
5936  *
5937  *****************************************************************************/
5938
5939 static void iwl3945_bg_init_alive_start(struct work_struct *data)
5940 {
5941         struct iwl3945_priv *priv =
5942             container_of(data, struct iwl3945_priv, init_alive_start.work);
5943
5944         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5945                 return;
5946
5947         mutex_lock(&priv->mutex);
5948         iwl3945_init_alive_start(priv);
5949         mutex_unlock(&priv->mutex);
5950 }
5951
5952 static void iwl3945_bg_alive_start(struct work_struct *data)
5953 {
5954         struct iwl3945_priv *priv =
5955             container_of(data, struct iwl3945_priv, alive_start.work);
5956
5957         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5958                 return;
5959
5960         mutex_lock(&priv->mutex);
5961         iwl3945_alive_start(priv);
5962         mutex_unlock(&priv->mutex);
5963 }
5964
5965 static void iwl3945_bg_rf_kill(struct work_struct *work)
5966 {
5967         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, rf_kill);
5968
5969         wake_up_interruptible(&priv->wait_command_queue);
5970
5971         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5972                 return;
5973
5974         mutex_lock(&priv->mutex);
5975
5976         if (!iwl3945_is_rfkill(priv)) {
5977                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5978                           "HW and/or SW RF Kill no longer active, restarting "
5979                           "device\n");
5980                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5981                         queue_work(priv->workqueue, &priv->restart);
5982         } else {
5983
5984                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5985                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5986                                           "disabled by SW switch\n");
5987                 else
5988                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5989                                     "Kill switch must be turned off for "
5990                                     "wireless networking to work.\n");
5991         }
5992
5993         mutex_unlock(&priv->mutex);
5994         iwl3945_rfkill_set_hw_state(priv);
5995 }
5996
5997 static void iwl3945_bg_set_monitor(struct work_struct *work)
5998 {
5999         struct iwl3945_priv *priv = container_of(work,
6000                                 struct iwl3945_priv, set_monitor);
6001
6002         IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n");
6003
6004         mutex_lock(&priv->mutex);
6005
6006         if (!iwl3945_is_ready(priv))
6007                 IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n");
6008         else
6009                 if (iwl3945_set_mode(priv, NL80211_IFTYPE_MONITOR) != 0)
6010                         IWL_ERROR("iwl3945_set_mode() failed\n");
6011
6012         mutex_unlock(&priv->mutex);
6013 }
6014
6015 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6016
6017 static void iwl3945_bg_scan_check(struct work_struct *data)
6018 {
6019         struct iwl3945_priv *priv =
6020             container_of(data, struct iwl3945_priv, scan_check.work);
6021
6022         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6023                 return;
6024
6025         mutex_lock(&priv->mutex);
6026         if (test_bit(STATUS_SCANNING, &priv->status) ||
6027             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6028                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6029                           "Scan completion watchdog resetting adapter (%dms)\n",
6030                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6031
6032                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6033                         iwl3945_send_scan_abort(priv);
6034         }
6035         mutex_unlock(&priv->mutex);
6036 }
6037
6038 static void iwl3945_bg_request_scan(struct work_struct *data)
6039 {
6040         struct iwl3945_priv *priv =
6041             container_of(data, struct iwl3945_priv, request_scan);
6042         struct iwl3945_host_cmd cmd = {
6043                 .id = REPLY_SCAN_CMD,
6044                 .len = sizeof(struct iwl3945_scan_cmd),
6045                 .meta.flags = CMD_SIZE_HUGE,
6046         };
6047         int rc = 0;
6048         struct iwl3945_scan_cmd *scan;
6049         struct ieee80211_conf *conf = NULL;
6050         u8 n_probes = 2;
6051         enum ieee80211_band band;
6052         DECLARE_SSID_BUF(ssid);
6053
6054         conf = ieee80211_get_hw_conf(priv->hw);
6055
6056         mutex_lock(&priv->mutex);
6057
6058         if (!iwl3945_is_ready(priv)) {
6059                 IWL_WARNING("request scan called when driver not ready.\n");
6060                 goto done;
6061         }
6062
6063         /* Make sure the scan wasn't canceled before this queued work
6064          * was given the chance to run... */
6065         if (!test_bit(STATUS_SCANNING, &priv->status))
6066                 goto done;
6067
6068         /* This should never be called or scheduled if there is currently
6069          * a scan active in the hardware. */
6070         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6071                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6072                                "Ignoring second request.\n");
6073                 rc = -EIO;
6074                 goto done;
6075         }
6076
6077         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6078                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6079                 goto done;
6080         }
6081
6082         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6083                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6084                 goto done;
6085         }
6086
6087         if (iwl3945_is_rfkill(priv)) {
6088                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6089                 goto done;
6090         }
6091
6092         if (!test_bit(STATUS_READY, &priv->status)) {
6093                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6094                 goto done;
6095         }
6096
6097         if (!priv->scan_bands) {
6098                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6099                 goto done;
6100         }
6101
6102         if (!priv->scan) {
6103                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6104                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6105                 if (!priv->scan) {
6106                         rc = -ENOMEM;
6107                         goto done;
6108                 }
6109         }
6110         scan = priv->scan;
6111         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6112
6113         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6114         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6115
6116         if (iwl3945_is_associated(priv)) {
6117                 u16 interval = 0;
6118                 u32 extra;
6119                 u32 suspend_time = 100;
6120                 u32 scan_suspend_time = 100;
6121                 unsigned long flags;
6122
6123                 IWL_DEBUG_INFO("Scanning while associated...\n");
6124
6125                 spin_lock_irqsave(&priv->lock, flags);
6126                 interval = priv->beacon_int;
6127                 spin_unlock_irqrestore(&priv->lock, flags);
6128
6129                 scan->suspend_time = 0;
6130                 scan->max_out_time = cpu_to_le32(200 * 1024);
6131                 if (!interval)
6132                         interval = suspend_time;
6133                 /*
6134                  * suspend time format:
6135                  *  0-19: beacon interval in usec (time before exec.)
6136                  * 20-23: 0
6137                  * 24-31: number of beacons (suspend between channels)
6138                  */
6139
6140                 extra = (suspend_time / interval) << 24;
6141                 scan_suspend_time = 0xFF0FFFFF &
6142                     (extra | ((suspend_time % interval) * 1024));
6143
6144                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6145                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6146                                scan_suspend_time, interval);
6147         }
6148
6149         /* We should add the ability for user to lock to PASSIVE ONLY */
6150         if (priv->one_direct_scan) {
6151                 IWL_DEBUG_SCAN
6152                     ("Kicking off one direct scan for '%s'\n",
6153                      print_ssid(ssid, priv->direct_ssid,
6154                                 priv->direct_ssid_len));
6155                 scan->direct_scan[0].id = WLAN_EID_SSID;
6156                 scan->direct_scan[0].len = priv->direct_ssid_len;
6157                 memcpy(scan->direct_scan[0].ssid,
6158                        priv->direct_ssid, priv->direct_ssid_len);
6159                 n_probes++;
6160         } else
6161                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
6162
6163         /* We don't build a direct scan probe request; the uCode will do
6164          * that based on the direct_mask added to each channel entry */
6165         scan->tx_cmd.len = cpu_to_le16(
6166                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6167                         IWL_MAX_SCAN_SIZE - sizeof(*scan)));
6168         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6169         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6170         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6171
6172         /* flags + rate selection */
6173
6174         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
6175                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6176                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6177                 scan->good_CRC_th = 0;
6178                 band = IEEE80211_BAND_2GHZ;
6179         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
6180                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6181                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6182                 band = IEEE80211_BAND_5GHZ;
6183         } else {
6184                 IWL_WARNING("Invalid scan band count\n");
6185                 goto done;
6186         }
6187
6188         /* select Rx antennas */
6189         scan->flags |= iwl3945_get_antenna_flags(priv);
6190
6191         if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
6192                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6193
6194         scan->channel_count =
6195                 iwl3945_get_channels_for_scan(priv, band, 1, /* active */
6196                                               n_probes,
6197                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6198
6199         if (scan->channel_count == 0) {
6200                 IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
6201                 goto done;
6202         }
6203
6204         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6205             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6206         cmd.data = scan;
6207         scan->len = cpu_to_le16(cmd.len);
6208
6209         set_bit(STATUS_SCAN_HW, &priv->status);
6210         rc = iwl3945_send_cmd_sync(priv, &cmd);
6211         if (rc)
6212                 goto done;
6213
6214         queue_delayed_work(priv->workqueue, &priv->scan_check,
6215                            IWL_SCAN_CHECK_WATCHDOG);
6216
6217         mutex_unlock(&priv->mutex);
6218         return;
6219
6220  done:
6221         /* can not perform scan make sure we clear scanning
6222          * bits from status so next scan request can be performed.
6223          * if we dont clear scanning status bit here all next scan
6224          * will fail
6225         */
6226         clear_bit(STATUS_SCAN_HW, &priv->status);
6227         clear_bit(STATUS_SCANNING, &priv->status);
6228
6229         /* inform mac80211 scan aborted */
6230         queue_work(priv->workqueue, &priv->scan_completed);
6231         mutex_unlock(&priv->mutex);
6232 }
6233
6234 static void iwl3945_bg_up(struct work_struct *data)
6235 {
6236         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, up);
6237
6238         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6239                 return;
6240
6241         mutex_lock(&priv->mutex);
6242         __iwl3945_up(priv);
6243         mutex_unlock(&priv->mutex);
6244         iwl3945_rfkill_set_hw_state(priv);
6245 }
6246
6247 static void iwl3945_bg_restart(struct work_struct *data)
6248 {
6249         struct iwl3945_priv *priv = container_of(data, struct iwl3945_priv, restart);
6250
6251         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6252                 return;
6253
6254         iwl3945_down(priv);
6255         queue_work(priv->workqueue, &priv->up);
6256 }
6257
6258 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6259 {
6260         struct iwl3945_priv *priv =
6261             container_of(data, struct iwl3945_priv, rx_replenish);
6262
6263         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6264                 return;
6265
6266         mutex_lock(&priv->mutex);
6267         iwl3945_rx_replenish(priv);
6268         mutex_unlock(&priv->mutex);
6269 }
6270
6271 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6272
6273 static void iwl3945_post_associate(struct iwl3945_priv *priv)
6274 {
6275         int rc = 0;
6276         struct ieee80211_conf *conf = NULL;
6277
6278         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6279                 IWL_ERROR("%s Should not be called in AP mode\n", __func__);
6280                 return;
6281         }
6282
6283
6284         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
6285                         priv->assoc_id, priv->active_rxon.bssid_addr);
6286
6287         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6288                 return;
6289
6290         if (!priv->vif || !priv->is_open)
6291                 return;
6292
6293         iwl3945_scan_cancel_timeout(priv, 200);
6294
6295         conf = ieee80211_get_hw_conf(priv->hw);
6296
6297         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6298         iwl3945_commit_rxon(priv);
6299
6300         memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6301         iwl3945_setup_rxon_timing(priv);
6302         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6303                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6304         if (rc)
6305                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6306                             "Attempting to continue.\n");
6307
6308         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6309
6310         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6311
6312         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6313                         priv->assoc_id, priv->beacon_int);
6314
6315         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6316                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6317         else
6318                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6319
6320         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6321                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6322                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6323                 else
6324                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6325
6326                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6327                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6328
6329         }
6330
6331         iwl3945_commit_rxon(priv);
6332
6333         switch (priv->iw_mode) {
6334         case NL80211_IFTYPE_STATION:
6335                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6336                 break;
6337
6338         case NL80211_IFTYPE_ADHOC:
6339
6340                 /* clear out the station table */
6341                 iwl3945_clear_stations_table(priv);
6342
6343                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6344                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6345                 iwl3945_sync_sta(priv, IWL_STA_ID,
6346                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6347                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6348                                  CMD_ASYNC);
6349                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6350                 iwl3945_send_beacon_cmd(priv);
6351
6352                 break;
6353
6354         default:
6355                  IWL_ERROR("%s Should not be called in %d mode\n",
6356                            __func__, priv->iw_mode);
6357                 break;
6358         }
6359
6360         iwl3945_activate_qos(priv, 0);
6361
6362         /* we have just associated, don't start scan too early */
6363         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6364 }
6365
6366 static void iwl3945_bg_abort_scan(struct work_struct *work)
6367 {
6368         struct iwl3945_priv *priv = container_of(work, struct iwl3945_priv, abort_scan);
6369
6370         if (!iwl3945_is_ready(priv))
6371                 return;
6372
6373         mutex_lock(&priv->mutex);
6374
6375         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6376         iwl3945_send_scan_abort(priv);
6377
6378         mutex_unlock(&priv->mutex);
6379 }
6380
6381 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed);
6382
6383 static void iwl3945_bg_scan_completed(struct work_struct *work)
6384 {
6385         struct iwl3945_priv *priv =
6386             container_of(work, struct iwl3945_priv, scan_completed);
6387
6388         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6389
6390         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6391                 return;
6392
6393         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6394                 iwl3945_mac_config(priv->hw, 0);
6395
6396         ieee80211_scan_completed(priv->hw);
6397
6398         /* Since setting the TXPOWER may have been deferred while
6399          * performing the scan, fire one off */
6400         mutex_lock(&priv->mutex);
6401         iwl3945_hw_reg_send_txpower(priv);
6402         mutex_unlock(&priv->mutex);
6403 }
6404
6405 /*****************************************************************************
6406  *
6407  * mac80211 entry point functions
6408  *
6409  *****************************************************************************/
6410
6411 #define UCODE_READY_TIMEOUT     (2 * HZ)
6412
6413 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6414 {
6415         struct iwl3945_priv *priv = hw->priv;
6416         int ret;
6417
6418         IWL_DEBUG_MAC80211("enter\n");
6419
6420         if (pci_enable_device(priv->pci_dev)) {
6421                 IWL_ERROR("Fail to pci_enable_device\n");
6422                 return -ENODEV;
6423         }
6424         pci_restore_state(priv->pci_dev);
6425         pci_enable_msi(priv->pci_dev);
6426
6427         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6428                           DRV_NAME, priv);
6429         if (ret) {
6430                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6431                 goto out_disable_msi;
6432         }
6433
6434         /* we should be verifying the device is ready to be opened */
6435         mutex_lock(&priv->mutex);
6436
6437         memset(&priv->staging_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6438         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6439          * ucode filename and max sizes are card-specific. */
6440
6441         if (!priv->ucode_code.len) {
6442                 ret = iwl3945_read_ucode(priv);
6443                 if (ret) {
6444                         IWL_ERROR("Could not read microcode: %d\n", ret);
6445                         mutex_unlock(&priv->mutex);
6446                         goto out_release_irq;
6447                 }
6448         }
6449
6450         ret = __iwl3945_up(priv);
6451
6452         mutex_unlock(&priv->mutex);
6453
6454         iwl3945_rfkill_set_hw_state(priv);
6455
6456         if (ret)
6457                 goto out_release_irq;
6458
6459         IWL_DEBUG_INFO("Start UP work.\n");
6460
6461         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6462                 return 0;
6463
6464         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6465          * mac80211 will not be run successfully. */
6466         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6467                         test_bit(STATUS_READY, &priv->status),
6468                         UCODE_READY_TIMEOUT);
6469         if (!ret) {
6470                 if (!test_bit(STATUS_READY, &priv->status)) {
6471                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6472                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6473                         ret = -ETIMEDOUT;
6474                         goto out_release_irq;
6475                 }
6476         }
6477
6478         priv->is_open = 1;
6479         IWL_DEBUG_MAC80211("leave\n");
6480         return 0;
6481
6482 out_release_irq:
6483         free_irq(priv->pci_dev->irq, priv);
6484 out_disable_msi:
6485         pci_disable_msi(priv->pci_dev);
6486         pci_disable_device(priv->pci_dev);
6487         priv->is_open = 0;
6488         IWL_DEBUG_MAC80211("leave - failed\n");
6489         return ret;
6490 }
6491
6492 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6493 {
6494         struct iwl3945_priv *priv = hw->priv;
6495
6496         IWL_DEBUG_MAC80211("enter\n");
6497
6498         if (!priv->is_open) {
6499                 IWL_DEBUG_MAC80211("leave - skip\n");
6500                 return;
6501         }
6502
6503         priv->is_open = 0;
6504
6505         if (iwl3945_is_ready_rf(priv)) {
6506                 /* stop mac, cancel any scan request and clear
6507                  * RXON_FILTER_ASSOC_MSK BIT
6508                  */
6509                 mutex_lock(&priv->mutex);
6510                 iwl3945_scan_cancel_timeout(priv, 100);
6511                 mutex_unlock(&priv->mutex);
6512         }
6513
6514         iwl3945_down(priv);
6515
6516         flush_workqueue(priv->workqueue);
6517         free_irq(priv->pci_dev->irq, priv);
6518         pci_disable_msi(priv->pci_dev);
6519         pci_save_state(priv->pci_dev);
6520         pci_disable_device(priv->pci_dev);
6521
6522         IWL_DEBUG_MAC80211("leave\n");
6523 }
6524
6525 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
6526 {
6527         struct iwl3945_priv *priv = hw->priv;
6528
6529         IWL_DEBUG_MAC80211("enter\n");
6530
6531         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6532                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
6533
6534         if (iwl3945_tx_skb(priv, skb))
6535                 dev_kfree_skb_any(skb);
6536
6537         IWL_DEBUG_MAC80211("leave\n");
6538         return 0;
6539 }
6540
6541 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6542                                  struct ieee80211_if_init_conf *conf)
6543 {
6544         struct iwl3945_priv *priv = hw->priv;
6545         unsigned long flags;
6546
6547         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6548
6549         if (priv->vif) {
6550                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6551                 return -EOPNOTSUPP;
6552         }
6553
6554         spin_lock_irqsave(&priv->lock, flags);
6555         priv->vif = conf->vif;
6556         priv->iw_mode = conf->type;
6557
6558         spin_unlock_irqrestore(&priv->lock, flags);
6559
6560         mutex_lock(&priv->mutex);
6561
6562         if (conf->mac_addr) {
6563                 IWL_DEBUG_MAC80211("Set: %pM\n", conf->mac_addr);
6564                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6565         }
6566
6567         if (iwl3945_is_ready(priv))
6568                 iwl3945_set_mode(priv, conf->type);
6569
6570         mutex_unlock(&priv->mutex);
6571
6572         IWL_DEBUG_MAC80211("leave\n");
6573         return 0;
6574 }
6575
6576 /**
6577  * iwl3945_mac_config - mac80211 config callback
6578  *
6579  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6580  * be set inappropriately and the driver currently sets the hardware up to
6581  * use it whenever needed.
6582  */
6583 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
6584 {
6585         struct iwl3945_priv *priv = hw->priv;
6586         const struct iwl3945_channel_info *ch_info;
6587         struct ieee80211_conf *conf = &hw->conf;
6588         unsigned long flags;
6589         int ret = 0;
6590
6591         mutex_lock(&priv->mutex);
6592         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6593
6594         if (!iwl3945_is_ready(priv)) {
6595                 IWL_DEBUG_MAC80211("leave - not ready\n");
6596                 ret = -EIO;
6597                 goto out;
6598         }
6599
6600         if (unlikely(!iwl3945_param_disable_hw_scan &&
6601                      test_bit(STATUS_SCANNING, &priv->status))) {
6602                 IWL_DEBUG_MAC80211("leave - scanning\n");
6603                 set_bit(STATUS_CONF_PENDING, &priv->status);
6604                 mutex_unlock(&priv->mutex);
6605                 return 0;
6606         }
6607
6608         spin_lock_irqsave(&priv->lock, flags);
6609
6610         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6611                                            conf->channel->hw_value);
6612         if (!is_channel_valid(ch_info)) {
6613                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
6614                                conf->channel->hw_value, conf->channel->band);
6615                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6616                 spin_unlock_irqrestore(&priv->lock, flags);
6617                 ret = -EINVAL;
6618                 goto out;
6619         }
6620
6621         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6622
6623         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6624
6625         /* The list of supported rates and rate mask can be different
6626          * for each phymode; since the phymode may have changed, reset
6627          * the rate mask to what mac80211 lists */
6628         iwl3945_set_rate(priv);
6629
6630         spin_unlock_irqrestore(&priv->lock, flags);
6631
6632 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6633         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6634                 iwl3945_hw_channel_switch(priv, conf->channel);
6635                 goto out;
6636         }
6637 #endif
6638
6639         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6640
6641         if (!conf->radio_enabled) {
6642                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6643                 goto out;
6644         }
6645
6646         if (iwl3945_is_rfkill(priv)) {
6647                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6648                 ret = -EIO;
6649                 goto out;
6650         }
6651
6652         iwl3945_set_rate(priv);
6653
6654         if (memcmp(&priv->active_rxon,
6655                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6656                 iwl3945_commit_rxon(priv);
6657         else
6658                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6659
6660         IWL_DEBUG_MAC80211("leave\n");
6661
6662 out:
6663         clear_bit(STATUS_CONF_PENDING, &priv->status);
6664         mutex_unlock(&priv->mutex);
6665         return ret;
6666 }
6667
6668 static void iwl3945_config_ap(struct iwl3945_priv *priv)
6669 {
6670         int rc = 0;
6671
6672         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6673                 return;
6674
6675         /* The following should be done only at AP bring up */
6676         if (!(iwl3945_is_associated(priv))) {
6677
6678                 /* RXON - unassoc (to set timing command) */
6679                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6680                 iwl3945_commit_rxon(priv);
6681
6682                 /* RXON Timing */
6683                 memset(&priv->rxon_timing, 0, sizeof(struct iwl3945_rxon_time_cmd));
6684                 iwl3945_setup_rxon_timing(priv);
6685                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6686                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6687                 if (rc)
6688                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6689                                         "Attempting to continue.\n");
6690
6691                 /* FIXME: what should be the assoc_id for AP? */
6692                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6693                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6694                         priv->staging_rxon.flags |=
6695                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6696                 else
6697                         priv->staging_rxon.flags &=
6698                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6699
6700                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6701                         if (priv->assoc_capability &
6702                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6703                                 priv->staging_rxon.flags |=
6704                                         RXON_FLG_SHORT_SLOT_MSK;
6705                         else
6706                                 priv->staging_rxon.flags &=
6707                                         ~RXON_FLG_SHORT_SLOT_MSK;
6708
6709                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6710                                 priv->staging_rxon.flags &=
6711                                         ~RXON_FLG_SHORT_SLOT_MSK;
6712                 }
6713                 /* restore RXON assoc */
6714                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6715                 iwl3945_commit_rxon(priv);
6716                 iwl3945_add_station(priv, iwl3945_broadcast_addr, 0, 0);
6717         }
6718         iwl3945_send_beacon_cmd(priv);
6719
6720         /* FIXME - we need to add code here to detect a totally new
6721          * configuration, reset the AP, unassoc, rxon timing, assoc,
6722          * clear sta table, add BCAST sta... */
6723 }
6724
6725 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6726                                         struct ieee80211_vif *vif,
6727                                     struct ieee80211_if_conf *conf)
6728 {
6729         struct iwl3945_priv *priv = hw->priv;
6730         int rc;
6731
6732         if (conf == NULL)
6733                 return -EIO;
6734
6735         if (priv->vif != vif) {
6736                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6737                 return 0;
6738         }
6739
6740         /* handle this temporarily here */
6741         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
6742             conf->changed & IEEE80211_IFCC_BEACON) {
6743                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
6744                 if (!beacon)
6745                         return -ENOMEM;
6746                 mutex_lock(&priv->mutex);
6747                 rc = iwl3945_mac_beacon_update(hw, beacon);
6748                 mutex_unlock(&priv->mutex);
6749                 if (rc)
6750                         return rc;
6751         }
6752
6753         if (!iwl3945_is_alive(priv))
6754                 return -EAGAIN;
6755
6756         mutex_lock(&priv->mutex);
6757
6758         if (conf->bssid)
6759                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
6760
6761 /*
6762  * very dubious code was here; the probe filtering flag is never set:
6763  *
6764         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6765             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6766  */
6767
6768         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6769                 if (!conf->bssid) {
6770                         conf->bssid = priv->mac_addr;
6771                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6772                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
6773                                            conf->bssid);
6774                 }
6775                 if (priv->ibss_beacon)
6776                         dev_kfree_skb(priv->ibss_beacon);
6777
6778                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
6779         }
6780
6781         if (iwl3945_is_rfkill(priv))
6782                 goto done;
6783
6784         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6785             !is_multicast_ether_addr(conf->bssid)) {
6786                 /* If there is currently a HW scan going on in the background
6787                  * then we need to cancel it else the RXON below will fail. */
6788                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6789                         IWL_WARNING("Aborted scan still in progress "
6790                                     "after 100ms\n");
6791                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6792                         mutex_unlock(&priv->mutex);
6793                         return -EAGAIN;
6794                 }
6795                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6796
6797                 /* TODO: Audit driver for usage of these members and see
6798                  * if mac80211 deprecates them (priv->bssid looks like it
6799                  * shouldn't be there, but I haven't scanned the IBSS code
6800                  * to verify) - jpk */
6801                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6802
6803                 if (priv->iw_mode == NL80211_IFTYPE_AP)
6804                         iwl3945_config_ap(priv);
6805                 else {
6806                         rc = iwl3945_commit_rxon(priv);
6807                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
6808                                 iwl3945_add_station(priv,
6809                                         priv->active_rxon.bssid_addr, 1, 0);
6810                 }
6811
6812         } else {
6813                 iwl3945_scan_cancel_timeout(priv, 100);
6814                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6815                 iwl3945_commit_rxon(priv);
6816         }
6817
6818  done:
6819         IWL_DEBUG_MAC80211("leave\n");
6820         mutex_unlock(&priv->mutex);
6821
6822         return 0;
6823 }
6824
6825 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6826                                  unsigned int changed_flags,
6827                                  unsigned int *total_flags,
6828                                  int mc_count, struct dev_addr_list *mc_list)
6829 {
6830         struct iwl3945_priv *priv = hw->priv;
6831
6832         if (changed_flags & (*total_flags) & FIF_OTHER_BSS) {
6833                 IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n",
6834                                    NL80211_IFTYPE_MONITOR,
6835                                    changed_flags, *total_flags);
6836                 /* queue work 'cuz mac80211 is holding a lock which
6837                  * prevents us from issuing (synchronous) f/w cmds */
6838                 queue_work(priv->workqueue, &priv->set_monitor);
6839         }
6840         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
6841                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6842 }
6843
6844 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
6845                                      struct ieee80211_if_init_conf *conf)
6846 {
6847         struct iwl3945_priv *priv = hw->priv;
6848
6849         IWL_DEBUG_MAC80211("enter\n");
6850
6851         mutex_lock(&priv->mutex);
6852
6853         if (iwl3945_is_ready_rf(priv)) {
6854                 iwl3945_scan_cancel_timeout(priv, 100);
6855                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6856                 iwl3945_commit_rxon(priv);
6857         }
6858         if (priv->vif == conf->vif) {
6859                 priv->vif = NULL;
6860                 memset(priv->bssid, 0, ETH_ALEN);
6861         }
6862         mutex_unlock(&priv->mutex);
6863
6864         IWL_DEBUG_MAC80211("leave\n");
6865 }
6866
6867 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6868
6869 static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
6870                                      struct ieee80211_vif *vif,
6871                                      struct ieee80211_bss_conf *bss_conf,
6872                                      u32 changes)
6873 {
6874         struct iwl3945_priv *priv = hw->priv;
6875
6876         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6877
6878         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6879                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6880                                    bss_conf->use_short_preamble);
6881                 if (bss_conf->use_short_preamble)
6882                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6883                 else
6884                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6885         }
6886
6887         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6888                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6889                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6890                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6891                 else
6892                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6893         }
6894
6895         if (changes & BSS_CHANGED_ASSOC) {
6896                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6897                 /* This should never happen as this function should
6898                  * never be called from interrupt context. */
6899                 if (WARN_ON_ONCE(in_interrupt()))
6900                         return;
6901                 if (bss_conf->assoc) {
6902                         priv->assoc_id = bss_conf->aid;
6903                         priv->beacon_int = bss_conf->beacon_int;
6904                         priv->timestamp0 = bss_conf->timestamp & 0xFFFFFFFF;
6905                         priv->timestamp1 = (bss_conf->timestamp >> 32) &
6906                                              0xFFFFFFFF;
6907                         priv->assoc_capability = bss_conf->assoc_capability;
6908                         priv->next_scan_jiffies = jiffies +
6909                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6910                         mutex_lock(&priv->mutex);
6911                         iwl3945_post_associate(priv);
6912                         mutex_unlock(&priv->mutex);
6913                 } else {
6914                         priv->assoc_id = 0;
6915                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6916                 }
6917         } else if (changes && iwl3945_is_associated(priv) && priv->assoc_id) {
6918                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6919                         iwl3945_send_rxon_assoc(priv);
6920         }
6921
6922 }
6923
6924 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6925 {
6926         int rc = 0;
6927         unsigned long flags;
6928         struct iwl3945_priv *priv = hw->priv;
6929         DECLARE_SSID_BUF(ssid_buf);
6930
6931         IWL_DEBUG_MAC80211("enter\n");
6932
6933         mutex_lock(&priv->mutex);
6934         spin_lock_irqsave(&priv->lock, flags);
6935
6936         if (!iwl3945_is_ready_rf(priv)) {
6937                 rc = -EIO;
6938                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6939                 goto out_unlock;
6940         }
6941
6942         if (priv->iw_mode == NL80211_IFTYPE_AP) {       /* APs don't scan */
6943                 rc = -EIO;
6944                 IWL_ERROR("ERROR: APs don't scan\n");
6945                 goto out_unlock;
6946         }
6947
6948         /* we don't schedule scan within next_scan_jiffies period */
6949         if (priv->next_scan_jiffies &&
6950                         time_after(priv->next_scan_jiffies, jiffies)) {
6951                 rc = -EAGAIN;
6952                 goto out_unlock;
6953         }
6954         /* if we just finished scan ask for delay for a broadcast scan */
6955         if ((len == 0) && priv->last_scan_jiffies &&
6956             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
6957                        jiffies)) {
6958                 rc = -EAGAIN;
6959                 goto out_unlock;
6960         }
6961         if (len) {
6962                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6963                                print_ssid(ssid_buf, ssid, len), (int)len);
6964
6965                 priv->one_direct_scan = 1;
6966                 priv->direct_ssid_len = (u8)
6967                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6968                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6969         } else
6970                 priv->one_direct_scan = 0;
6971
6972         rc = iwl3945_scan_initiate(priv);
6973
6974         IWL_DEBUG_MAC80211("leave\n");
6975
6976 out_unlock:
6977         spin_unlock_irqrestore(&priv->lock, flags);
6978         mutex_unlock(&priv->mutex);
6979
6980         return rc;
6981 }
6982
6983 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6984                            const u8 *local_addr, const u8 *addr,
6985                            struct ieee80211_key_conf *key)
6986 {
6987         struct iwl3945_priv *priv = hw->priv;
6988         int rc = 0;
6989         u8 sta_id;
6990
6991         IWL_DEBUG_MAC80211("enter\n");
6992
6993         if (!iwl3945_param_hwcrypto) {
6994                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6995                 return -EOPNOTSUPP;
6996         }
6997
6998         if (is_zero_ether_addr(addr))
6999                 /* only support pairwise keys */
7000                 return -EOPNOTSUPP;
7001
7002         sta_id = iwl3945_hw_find_station(priv, addr);
7003         if (sta_id == IWL_INVALID_STATION) {
7004                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
7005                                    addr);
7006                 return -EINVAL;
7007         }
7008
7009         mutex_lock(&priv->mutex);
7010
7011         iwl3945_scan_cancel_timeout(priv, 100);
7012
7013         switch (cmd) {
7014         case  SET_KEY:
7015                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
7016                 if (!rc) {
7017                         iwl3945_set_rxon_hwcrypto(priv, 1);
7018                         iwl3945_commit_rxon(priv);
7019                         key->hw_key_idx = sta_id;
7020                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7021                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7022                 }
7023                 break;
7024         case DISABLE_KEY:
7025                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
7026                 if (!rc) {
7027                         iwl3945_set_rxon_hwcrypto(priv, 0);
7028                         iwl3945_commit_rxon(priv);
7029                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7030                 }
7031                 break;
7032         default:
7033                 rc = -EINVAL;
7034         }
7035
7036         IWL_DEBUG_MAC80211("leave\n");
7037         mutex_unlock(&priv->mutex);
7038
7039         return rc;
7040 }
7041
7042 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
7043                            const struct ieee80211_tx_queue_params *params)
7044 {
7045         struct iwl3945_priv *priv = hw->priv;
7046         unsigned long flags;
7047         int q;
7048
7049         IWL_DEBUG_MAC80211("enter\n");
7050
7051         if (!iwl3945_is_ready_rf(priv)) {
7052                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7053                 return -EIO;
7054         }
7055
7056         if (queue >= AC_NUM) {
7057                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7058                 return 0;
7059         }
7060
7061         if (!priv->qos_data.qos_enable) {
7062                 priv->qos_data.qos_active = 0;
7063                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7064                 return 0;
7065         }
7066         q = AC_NUM - 1 - queue;
7067
7068         spin_lock_irqsave(&priv->lock, flags);
7069
7070         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7071         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7072         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7073         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7074                         cpu_to_le16((params->txop * 32));
7075
7076         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7077         priv->qos_data.qos_active = 1;
7078
7079         spin_unlock_irqrestore(&priv->lock, flags);
7080
7081         mutex_lock(&priv->mutex);
7082         if (priv->iw_mode == NL80211_IFTYPE_AP)
7083                 iwl3945_activate_qos(priv, 1);
7084         else if (priv->assoc_id && iwl3945_is_associated(priv))
7085                 iwl3945_activate_qos(priv, 0);
7086
7087         mutex_unlock(&priv->mutex);
7088
7089         IWL_DEBUG_MAC80211("leave\n");
7090         return 0;
7091 }
7092
7093 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7094                                 struct ieee80211_tx_queue_stats *stats)
7095 {
7096         struct iwl3945_priv *priv = hw->priv;
7097         int i, avail;
7098         struct iwl3945_tx_queue *txq;
7099         struct iwl3945_queue *q;
7100         unsigned long flags;
7101
7102         IWL_DEBUG_MAC80211("enter\n");
7103
7104         if (!iwl3945_is_ready_rf(priv)) {
7105                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7106                 return -EIO;
7107         }
7108
7109         spin_lock_irqsave(&priv->lock, flags);
7110
7111         for (i = 0; i < AC_NUM; i++) {
7112                 txq = &priv->txq[i];
7113                 q = &txq->q;
7114                 avail = iwl3945_queue_space(q);
7115
7116                 stats[i].len = q->n_window - avail;
7117                 stats[i].limit = q->n_window - q->high_mark;
7118                 stats[i].count = q->n_window;
7119
7120         }
7121         spin_unlock_irqrestore(&priv->lock, flags);
7122
7123         IWL_DEBUG_MAC80211("leave\n");
7124
7125         return 0;
7126 }
7127
7128 static int iwl3945_mac_get_stats(struct ieee80211_hw *hw,
7129                              struct ieee80211_low_level_stats *stats)
7130 {
7131         IWL_DEBUG_MAC80211("enter\n");
7132         IWL_DEBUG_MAC80211("leave\n");
7133
7134         return 0;
7135 }
7136
7137 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7138 {
7139         struct iwl3945_priv *priv = hw->priv;
7140         unsigned long flags;
7141
7142         mutex_lock(&priv->mutex);
7143         IWL_DEBUG_MAC80211("enter\n");
7144
7145         iwl3945_reset_qos(priv);
7146
7147         spin_lock_irqsave(&priv->lock, flags);
7148         priv->assoc_id = 0;
7149         priv->assoc_capability = 0;
7150         priv->call_post_assoc_from_beacon = 0;
7151
7152         /* new association get rid of ibss beacon skb */
7153         if (priv->ibss_beacon)
7154                 dev_kfree_skb(priv->ibss_beacon);
7155
7156         priv->ibss_beacon = NULL;
7157
7158         priv->beacon_int = priv->hw->conf.beacon_int;
7159         priv->timestamp1 = 0;
7160         priv->timestamp0 = 0;
7161         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
7162                 priv->beacon_int = 0;
7163
7164         spin_unlock_irqrestore(&priv->lock, flags);
7165
7166         if (!iwl3945_is_ready_rf(priv)) {
7167                 IWL_DEBUG_MAC80211("leave - not ready\n");
7168                 mutex_unlock(&priv->mutex);
7169                 return;
7170         }
7171
7172         /* we are restarting association process
7173          * clear RXON_FILTER_ASSOC_MSK bit
7174         */
7175         if (priv->iw_mode != NL80211_IFTYPE_AP) {
7176                 iwl3945_scan_cancel_timeout(priv, 100);
7177                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7178                 iwl3945_commit_rxon(priv);
7179         }
7180
7181         /* Per mac80211.h: This is only used in IBSS mode... */
7182         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7183
7184                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7185                 mutex_unlock(&priv->mutex);
7186                 return;
7187         }
7188
7189         iwl3945_set_rate(priv);
7190
7191         mutex_unlock(&priv->mutex);
7192
7193         IWL_DEBUG_MAC80211("leave\n");
7194
7195 }
7196
7197 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
7198 {
7199         struct iwl3945_priv *priv = hw->priv;
7200         unsigned long flags;
7201
7202         IWL_DEBUG_MAC80211("enter\n");
7203
7204         if (!iwl3945_is_ready_rf(priv)) {
7205                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7206                 return -EIO;
7207         }
7208
7209         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7210                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7211                 return -EIO;
7212         }
7213
7214         spin_lock_irqsave(&priv->lock, flags);
7215
7216         if (priv->ibss_beacon)
7217                 dev_kfree_skb(priv->ibss_beacon);
7218
7219         priv->ibss_beacon = skb;
7220
7221         priv->assoc_id = 0;
7222
7223         IWL_DEBUG_MAC80211("leave\n");
7224         spin_unlock_irqrestore(&priv->lock, flags);
7225
7226         iwl3945_reset_qos(priv);
7227
7228         iwl3945_post_associate(priv);
7229
7230
7231         return 0;
7232 }
7233
7234 /*****************************************************************************
7235  *
7236  * sysfs attributes
7237  *
7238  *****************************************************************************/
7239
7240 #ifdef CONFIG_IWL3945_DEBUG
7241
7242 /*
7243  * The following adds a new attribute to the sysfs representation
7244  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7245  * used for controlling the debug level.
7246  *
7247  * See the level definitions in iwl for details.
7248  */
7249
7250 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7251 {
7252         return sprintf(buf, "0x%08X\n", iwl3945_debug_level);
7253 }
7254 static ssize_t store_debug_level(struct device_driver *d,
7255                                  const char *buf, size_t count)
7256 {
7257         char *p = (char *)buf;
7258         u32 val;
7259
7260         val = simple_strtoul(p, &p, 0);
7261         if (p == buf)
7262                 printk(KERN_INFO DRV_NAME
7263                        ": %s is not in hex or decimal form.\n", buf);
7264         else
7265                 iwl3945_debug_level = val;
7266
7267         return strnlen(buf, count);
7268 }
7269
7270 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7271                    show_debug_level, store_debug_level);
7272
7273 #endif /* CONFIG_IWL3945_DEBUG */
7274
7275 static ssize_t show_temperature(struct device *d,
7276                                 struct device_attribute *attr, char *buf)
7277 {
7278         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7279
7280         if (!iwl3945_is_alive(priv))
7281                 return -EAGAIN;
7282
7283         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7284 }
7285
7286 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7287
7288 static ssize_t show_tx_power(struct device *d,
7289                              struct device_attribute *attr, char *buf)
7290 {
7291         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7292         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7293 }
7294
7295 static ssize_t store_tx_power(struct device *d,
7296                               struct device_attribute *attr,
7297                               const char *buf, size_t count)
7298 {
7299         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7300         char *p = (char *)buf;
7301         u32 val;
7302
7303         val = simple_strtoul(p, &p, 10);
7304         if (p == buf)
7305                 printk(KERN_INFO DRV_NAME
7306                        ": %s is not in decimal form.\n", buf);
7307         else
7308                 iwl3945_hw_reg_set_txpower(priv, val);
7309
7310         return count;
7311 }
7312
7313 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7314
7315 static ssize_t show_flags(struct device *d,
7316                           struct device_attribute *attr, char *buf)
7317 {
7318         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7319
7320         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7321 }
7322
7323 static ssize_t store_flags(struct device *d,
7324                            struct device_attribute *attr,
7325                            const char *buf, size_t count)
7326 {
7327         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7328         u32 flags = simple_strtoul(buf, NULL, 0);
7329
7330         mutex_lock(&priv->mutex);
7331         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7332                 /* Cancel any currently running scans... */
7333                 if (iwl3945_scan_cancel_timeout(priv, 100))
7334                         IWL_WARNING("Could not cancel scan.\n");
7335                 else {
7336                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7337                                        flags);
7338                         priv->staging_rxon.flags = cpu_to_le32(flags);
7339                         iwl3945_commit_rxon(priv);
7340                 }
7341         }
7342         mutex_unlock(&priv->mutex);
7343
7344         return count;
7345 }
7346
7347 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7348
7349 static ssize_t show_filter_flags(struct device *d,
7350                                  struct device_attribute *attr, char *buf)
7351 {
7352         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7353
7354         return sprintf(buf, "0x%04X\n",
7355                 le32_to_cpu(priv->active_rxon.filter_flags));
7356 }
7357
7358 static ssize_t store_filter_flags(struct device *d,
7359                                   struct device_attribute *attr,
7360                                   const char *buf, size_t count)
7361 {
7362         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7363         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7364
7365         mutex_lock(&priv->mutex);
7366         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7367                 /* Cancel any currently running scans... */
7368                 if (iwl3945_scan_cancel_timeout(priv, 100))
7369                         IWL_WARNING("Could not cancel scan.\n");
7370                 else {
7371                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7372                                        "0x%04X\n", filter_flags);
7373                         priv->staging_rxon.filter_flags =
7374                                 cpu_to_le32(filter_flags);
7375                         iwl3945_commit_rxon(priv);
7376                 }
7377         }
7378         mutex_unlock(&priv->mutex);
7379
7380         return count;
7381 }
7382
7383 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7384                    store_filter_flags);
7385
7386 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7387
7388 static ssize_t show_measurement(struct device *d,
7389                                 struct device_attribute *attr, char *buf)
7390 {
7391         struct iwl3945_priv *priv = dev_get_drvdata(d);
7392         struct iwl3945_spectrum_notification measure_report;
7393         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7394         u8 *data = (u8 *)&measure_report;
7395         unsigned long flags;
7396
7397         spin_lock_irqsave(&priv->lock, flags);
7398         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7399                 spin_unlock_irqrestore(&priv->lock, flags);
7400                 return 0;
7401         }
7402         memcpy(&measure_report, &priv->measure_report, size);
7403         priv->measurement_status = 0;
7404         spin_unlock_irqrestore(&priv->lock, flags);
7405
7406         while (size && (PAGE_SIZE - len)) {
7407                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7408                                    PAGE_SIZE - len, 1);
7409                 len = strlen(buf);
7410                 if (PAGE_SIZE - len)
7411                         buf[len++] = '\n';
7412
7413                 ofs += 16;
7414                 size -= min(size, 16U);
7415         }
7416
7417         return len;
7418 }
7419
7420 static ssize_t store_measurement(struct device *d,
7421                                  struct device_attribute *attr,
7422                                  const char *buf, size_t count)
7423 {
7424         struct iwl3945_priv *priv = dev_get_drvdata(d);
7425         struct ieee80211_measurement_params params = {
7426                 .channel = le16_to_cpu(priv->active_rxon.channel),
7427                 .start_time = cpu_to_le64(priv->last_tsf),
7428                 .duration = cpu_to_le16(1),
7429         };
7430         u8 type = IWL_MEASURE_BASIC;
7431         u8 buffer[32];
7432         u8 channel;
7433
7434         if (count) {
7435                 char *p = buffer;
7436                 strncpy(buffer, buf, min(sizeof(buffer), count));
7437                 channel = simple_strtoul(p, NULL, 0);
7438                 if (channel)
7439                         params.channel = channel;
7440
7441                 p = buffer;
7442                 while (*p && *p != ' ')
7443                         p++;
7444                 if (*p)
7445                         type = simple_strtoul(p + 1, NULL, 0);
7446         }
7447
7448         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7449                        "channel %d (for '%s')\n", type, params.channel, buf);
7450         iwl3945_get_measurement(priv, &params, type);
7451
7452         return count;
7453 }
7454
7455 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7456                    show_measurement, store_measurement);
7457 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7458
7459 static ssize_t store_retry_rate(struct device *d,
7460                                 struct device_attribute *attr,
7461                                 const char *buf, size_t count)
7462 {
7463         struct iwl3945_priv *priv = dev_get_drvdata(d);
7464
7465         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7466         if (priv->retry_rate <= 0)
7467                 priv->retry_rate = 1;
7468
7469         return count;
7470 }
7471
7472 static ssize_t show_retry_rate(struct device *d,
7473                                struct device_attribute *attr, char *buf)
7474 {
7475         struct iwl3945_priv *priv = dev_get_drvdata(d);
7476         return sprintf(buf, "%d", priv->retry_rate);
7477 }
7478
7479 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7480                    store_retry_rate);
7481
7482 static ssize_t store_power_level(struct device *d,
7483                                  struct device_attribute *attr,
7484                                  const char *buf, size_t count)
7485 {
7486         struct iwl3945_priv *priv = dev_get_drvdata(d);
7487         int rc;
7488         int mode;
7489
7490         mode = simple_strtoul(buf, NULL, 0);
7491         mutex_lock(&priv->mutex);
7492
7493         if (!iwl3945_is_ready(priv)) {
7494                 rc = -EAGAIN;
7495                 goto out;
7496         }
7497
7498         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7499                 mode = IWL_POWER_AC;
7500         else
7501                 mode |= IWL_POWER_ENABLED;
7502
7503         if (mode != priv->power_mode) {
7504                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7505                 if (rc) {
7506                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7507                         goto out;
7508                 }
7509                 priv->power_mode = mode;
7510         }
7511
7512         rc = count;
7513
7514  out:
7515         mutex_unlock(&priv->mutex);
7516         return rc;
7517 }
7518
7519 #define MAX_WX_STRING 80
7520
7521 /* Values are in microsecond */
7522 static const s32 timeout_duration[] = {
7523         350000,
7524         250000,
7525         75000,
7526         37000,
7527         25000,
7528 };
7529 static const s32 period_duration[] = {
7530         400000,
7531         700000,
7532         1000000,
7533         1000000,
7534         1000000
7535 };
7536
7537 static ssize_t show_power_level(struct device *d,
7538                                 struct device_attribute *attr, char *buf)
7539 {
7540         struct iwl3945_priv *priv = dev_get_drvdata(d);
7541         int level = IWL_POWER_LEVEL(priv->power_mode);
7542         char *p = buf;
7543
7544         p += sprintf(p, "%d ", level);
7545         switch (level) {
7546         case IWL_POWER_MODE_CAM:
7547         case IWL_POWER_AC:
7548                 p += sprintf(p, "(AC)");
7549                 break;
7550         case IWL_POWER_BATTERY:
7551                 p += sprintf(p, "(BATTERY)");
7552                 break;
7553         default:
7554                 p += sprintf(p,
7555                              "(Timeout %dms, Period %dms)",
7556                              timeout_duration[level - 1] / 1000,
7557                              period_duration[level - 1] / 1000);
7558         }
7559
7560         if (!(priv->power_mode & IWL_POWER_ENABLED))
7561                 p += sprintf(p, " OFF\n");
7562         else
7563                 p += sprintf(p, " \n");
7564
7565         return p - buf + 1;
7566
7567 }
7568
7569 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7570                    store_power_level);
7571
7572 static ssize_t show_channels(struct device *d,
7573                              struct device_attribute *attr, char *buf)
7574 {
7575         /* all this shit doesn't belong into sysfs anyway */
7576         return 0;
7577 }
7578
7579 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7580
7581 static ssize_t show_statistics(struct device *d,
7582                                struct device_attribute *attr, char *buf)
7583 {
7584         struct iwl3945_priv *priv = dev_get_drvdata(d);
7585         u32 size = sizeof(struct iwl3945_notif_statistics);
7586         u32 len = 0, ofs = 0;
7587         u8 *data = (u8 *)&priv->statistics;
7588         int rc = 0;
7589
7590         if (!iwl3945_is_alive(priv))
7591                 return -EAGAIN;
7592
7593         mutex_lock(&priv->mutex);
7594         rc = iwl3945_send_statistics_request(priv);
7595         mutex_unlock(&priv->mutex);
7596
7597         if (rc) {
7598                 len = sprintf(buf,
7599                               "Error sending statistics request: 0x%08X\n", rc);
7600                 return len;
7601         }
7602
7603         while (size && (PAGE_SIZE - len)) {
7604                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7605                                    PAGE_SIZE - len, 1);
7606                 len = strlen(buf);
7607                 if (PAGE_SIZE - len)
7608                         buf[len++] = '\n';
7609
7610                 ofs += 16;
7611                 size -= min(size, 16U);
7612         }
7613
7614         return len;
7615 }
7616
7617 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7618
7619 static ssize_t show_antenna(struct device *d,
7620                             struct device_attribute *attr, char *buf)
7621 {
7622         struct iwl3945_priv *priv = dev_get_drvdata(d);
7623
7624         if (!iwl3945_is_alive(priv))
7625                 return -EAGAIN;
7626
7627         return sprintf(buf, "%d\n", priv->antenna);
7628 }
7629
7630 static ssize_t store_antenna(struct device *d,
7631                              struct device_attribute *attr,
7632                              const char *buf, size_t count)
7633 {
7634         int ant;
7635         struct iwl3945_priv *priv = dev_get_drvdata(d);
7636
7637         if (count == 0)
7638                 return 0;
7639
7640         if (sscanf(buf, "%1i", &ant) != 1) {
7641                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7642                 return count;
7643         }
7644
7645         if ((ant >= 0) && (ant <= 2)) {
7646                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7647                 priv->antenna = (enum iwl3945_antenna)ant;
7648         } else
7649                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7650
7651
7652         return count;
7653 }
7654
7655 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7656
7657 static ssize_t show_status(struct device *d,
7658                            struct device_attribute *attr, char *buf)
7659 {
7660         struct iwl3945_priv *priv = (struct iwl3945_priv *)d->driver_data;
7661         if (!iwl3945_is_alive(priv))
7662                 return -EAGAIN;
7663         return sprintf(buf, "0x%08x\n", (int)priv->status);
7664 }
7665
7666 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7667
7668 static ssize_t dump_error_log(struct device *d,
7669                               struct device_attribute *attr,
7670                               const char *buf, size_t count)
7671 {
7672         char *p = (char *)buf;
7673
7674         if (p[0] == '1')
7675                 iwl3945_dump_nic_error_log((struct iwl3945_priv *)d->driver_data);
7676
7677         return strnlen(buf, count);
7678 }
7679
7680 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7681
7682 static ssize_t dump_event_log(struct device *d,
7683                               struct device_attribute *attr,
7684                               const char *buf, size_t count)
7685 {
7686         char *p = (char *)buf;
7687
7688         if (p[0] == '1')
7689                 iwl3945_dump_nic_event_log((struct iwl3945_priv *)d->driver_data);
7690
7691         return strnlen(buf, count);
7692 }
7693
7694 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7695
7696 /*****************************************************************************
7697  *
7698  * driver setup and tear down
7699  *
7700  *****************************************************************************/
7701
7702 static void iwl3945_setup_deferred_work(struct iwl3945_priv *priv)
7703 {
7704         priv->workqueue = create_workqueue(DRV_NAME);
7705
7706         init_waitqueue_head(&priv->wait_command_queue);
7707
7708         INIT_WORK(&priv->up, iwl3945_bg_up);
7709         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7710         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7711         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7712         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7713         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7714         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7715         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7716         INIT_WORK(&priv->set_monitor, iwl3945_bg_set_monitor);
7717         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7718         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7719         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7720
7721         iwl3945_hw_setup_deferred_work(priv);
7722
7723         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7724                      iwl3945_irq_tasklet, (unsigned long)priv);
7725 }
7726
7727 static void iwl3945_cancel_deferred_work(struct iwl3945_priv *priv)
7728 {
7729         iwl3945_hw_cancel_deferred_work(priv);
7730
7731         cancel_delayed_work_sync(&priv->init_alive_start);
7732         cancel_delayed_work(&priv->scan_check);
7733         cancel_delayed_work(&priv->alive_start);
7734         cancel_work_sync(&priv->beacon_update);
7735 }
7736
7737 static struct attribute *iwl3945_sysfs_entries[] = {
7738         &dev_attr_antenna.attr,
7739         &dev_attr_channels.attr,
7740         &dev_attr_dump_errors.attr,
7741         &dev_attr_dump_events.attr,
7742         &dev_attr_flags.attr,
7743         &dev_attr_filter_flags.attr,
7744 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7745         &dev_attr_measurement.attr,
7746 #endif
7747         &dev_attr_power_level.attr,
7748         &dev_attr_retry_rate.attr,
7749         &dev_attr_statistics.attr,
7750         &dev_attr_status.attr,
7751         &dev_attr_temperature.attr,
7752         &dev_attr_tx_power.attr,
7753
7754         NULL
7755 };
7756
7757 static struct attribute_group iwl3945_attribute_group = {
7758         .name = NULL,           /* put in device directory */
7759         .attrs = iwl3945_sysfs_entries,
7760 };
7761
7762 static struct ieee80211_ops iwl3945_hw_ops = {
7763         .tx = iwl3945_mac_tx,
7764         .start = iwl3945_mac_start,
7765         .stop = iwl3945_mac_stop,
7766         .add_interface = iwl3945_mac_add_interface,
7767         .remove_interface = iwl3945_mac_remove_interface,
7768         .config = iwl3945_mac_config,
7769         .config_interface = iwl3945_mac_config_interface,
7770         .configure_filter = iwl3945_configure_filter,
7771         .set_key = iwl3945_mac_set_key,
7772         .get_stats = iwl3945_mac_get_stats,
7773         .get_tx_stats = iwl3945_mac_get_tx_stats,
7774         .conf_tx = iwl3945_mac_conf_tx,
7775         .reset_tsf = iwl3945_mac_reset_tsf,
7776         .bss_info_changed = iwl3945_bss_info_changed,
7777         .hw_scan = iwl3945_mac_hw_scan
7778 };
7779
7780 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7781 {
7782         int err = 0;
7783         struct iwl3945_priv *priv;
7784         struct ieee80211_hw *hw;
7785         struct iwl_3945_cfg *cfg = (struct iwl_3945_cfg *)(ent->driver_data);
7786         unsigned long flags;
7787
7788         /* Disabling hardware scan means that mac80211 will perform scans
7789          * "the hard way", rather than using device's scan. */
7790         if (iwl3945_param_disable_hw_scan) {
7791                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7792                 iwl3945_hw_ops.hw_scan = NULL;
7793         }
7794
7795         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7796             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7797                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7798                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7799                 err = -EINVAL;
7800                 goto out;
7801         }
7802
7803         /* mac80211 allocates memory for this device instance, including
7804          *   space for this driver's private structure */
7805         hw = ieee80211_alloc_hw(sizeof(struct iwl3945_priv), &iwl3945_hw_ops);
7806         if (hw == NULL) {
7807                 IWL_ERROR("Can not allocate network device\n");
7808                 err = -ENOMEM;
7809                 goto out;
7810         }
7811         SET_IEEE80211_DEV(hw, &pdev->dev);
7812
7813         hw->rate_control_algorithm = "iwl-3945-rs";
7814         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
7815
7816         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7817         priv = hw->priv;
7818         priv->hw = hw;
7819
7820         priv->pci_dev = pdev;
7821         priv->cfg = cfg;
7822
7823         /* Select antenna (may be helpful if only one antenna is connected) */
7824         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7825 #ifdef CONFIG_IWL3945_DEBUG
7826         iwl3945_debug_level = iwl3945_param_debug;
7827         atomic_set(&priv->restrict_refcnt, 0);
7828 #endif
7829         priv->retry_rate = 1;
7830
7831         priv->ibss_beacon = NULL;
7832
7833         /* Tell mac80211 our characteristics */
7834         hw->flags = IEEE80211_HW_SIGNAL_DBM |
7835                     IEEE80211_HW_NOISE_DBM;
7836
7837         hw->wiphy->interface_modes =
7838                 BIT(NL80211_IFTYPE_AP) |
7839                 BIT(NL80211_IFTYPE_STATION) |
7840                 BIT(NL80211_IFTYPE_ADHOC);
7841
7842         /* 4 EDCA QOS priorities */
7843         hw->queues = 4;
7844
7845         spin_lock_init(&priv->lock);
7846         spin_lock_init(&priv->power_data.lock);
7847         spin_lock_init(&priv->sta_lock);
7848         spin_lock_init(&priv->hcmd_lock);
7849
7850         INIT_LIST_HEAD(&priv->free_frames);
7851
7852         mutex_init(&priv->mutex);
7853         if (pci_enable_device(pdev)) {
7854                 err = -ENODEV;
7855                 goto out_ieee80211_free_hw;
7856         }
7857
7858         pci_set_master(pdev);
7859
7860         /* Clear the driver's (not device's) station table */
7861         iwl3945_clear_stations_table(priv);
7862
7863         priv->data_retry_limit = -1;
7864         priv->ieee_channels = NULL;
7865         priv->ieee_rates = NULL;
7866         priv->band = IEEE80211_BAND_2GHZ;
7867
7868         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7869         if (!err)
7870                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7871         if (err) {
7872                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
7873                 goto out_pci_disable_device;
7874         }
7875
7876         pci_set_drvdata(pdev, priv);
7877         err = pci_request_regions(pdev, DRV_NAME);
7878         if (err)
7879                 goto out_pci_disable_device;
7880
7881         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7882          * PCI Tx retries from interfering with C3 CPU state */
7883         pci_write_config_byte(pdev, 0x41, 0x00);
7884
7885         priv->hw_base = pci_iomap(pdev, 0, 0);
7886         if (!priv->hw_base) {
7887                 err = -ENODEV;
7888                 goto out_pci_release_regions;
7889         }
7890
7891         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7892                         (unsigned long long) pci_resource_len(pdev, 0));
7893         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7894
7895         /* Initialize module parameter values here */
7896
7897         /* Disable radio (SW RF KILL) via parameter when loading driver */
7898         if (iwl3945_param_disable) {
7899                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7900                 IWL_DEBUG_INFO("Radio disabled.\n");
7901         }
7902
7903         priv->iw_mode = NL80211_IFTYPE_STATION;
7904
7905         printk(KERN_INFO DRV_NAME
7906                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7907
7908         /* Device-specific setup */
7909         if (iwl3945_hw_set_hw_setting(priv)) {
7910                 IWL_ERROR("failed to set hw settings\n");
7911                 goto out_iounmap;
7912         }
7913
7914         if (iwl3945_param_qos_enable)
7915                 priv->qos_data.qos_enable = 1;
7916
7917         iwl3945_reset_qos(priv);
7918
7919         priv->qos_data.qos_active = 0;
7920         priv->qos_data.qos_cap.val = 0;
7921
7922         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
7923         iwl3945_setup_deferred_work(priv);
7924         iwl3945_setup_rx_handlers(priv);
7925
7926         priv->rates_mask = IWL_RATES_MASK;
7927         /* If power management is turned on, default to AC mode */
7928         priv->power_mode = IWL_POWER_AC;
7929         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
7930
7931         spin_lock_irqsave(&priv->lock, flags);
7932         iwl3945_disable_interrupts(priv);
7933         spin_unlock_irqrestore(&priv->lock, flags);
7934
7935         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
7936         if (err) {
7937                 IWL_ERROR("failed to create sysfs device attributes\n");
7938                 goto out_release_irq;
7939         }
7940
7941         /* nic init */
7942         iwl3945_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7943                         CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7944
7945         iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7946         err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
7947                                CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
7948                                CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7949         if (err < 0) {
7950                 IWL_DEBUG_INFO("Failed to init the card\n");
7951                 goto out_remove_sysfs;
7952         }
7953         /* Read the EEPROM */
7954         err = iwl3945_eeprom_init(priv);
7955         if (err) {
7956                 IWL_ERROR("Unable to init EEPROM\n");
7957                 goto out_remove_sysfs;
7958         }
7959         /* MAC Address location in EEPROM same for 3945/4965 */
7960         get_eeprom_mac(priv, priv->mac_addr);
7961         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
7962         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7963
7964         err = iwl3945_init_channel_map(priv);
7965         if (err) {
7966                 IWL_ERROR("initializing regulatory failed: %d\n", err);
7967                 goto out_remove_sysfs;
7968         }
7969
7970         err = iwl3945_init_geos(priv);
7971         if (err) {
7972                 IWL_ERROR("initializing geos failed: %d\n", err);
7973                 goto out_free_channel_map;
7974         }
7975
7976         err = ieee80211_register_hw(priv->hw);
7977         if (err) {
7978                 IWL_ERROR("Failed to register network device (error %d)\n", err);
7979                 goto out_free_geos;
7980         }
7981
7982         priv->hw->conf.beacon_int = 100;
7983         priv->mac80211_registered = 1;
7984         pci_save_state(pdev);
7985         pci_disable_device(pdev);
7986
7987         err = iwl3945_rfkill_init(priv);
7988         if (err)
7989                 IWL_ERROR("Unable to initialize RFKILL system. "
7990                                   "Ignoring error: %d\n", err);
7991
7992         return 0;
7993
7994  out_free_geos:
7995         iwl3945_free_geos(priv);
7996  out_free_channel_map:
7997         iwl3945_free_channel_map(priv);
7998  out_remove_sysfs:
7999         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8000
8001  out_release_irq:
8002         destroy_workqueue(priv->workqueue);
8003         priv->workqueue = NULL;
8004         iwl3945_unset_hw_setting(priv);
8005
8006  out_iounmap:
8007         pci_iounmap(pdev, priv->hw_base);
8008  out_pci_release_regions:
8009         pci_release_regions(pdev);
8010  out_pci_disable_device:
8011         pci_disable_device(pdev);
8012         pci_set_drvdata(pdev, NULL);
8013  out_ieee80211_free_hw:
8014         ieee80211_free_hw(priv->hw);
8015  out:
8016         return err;
8017 }
8018
8019 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
8020 {
8021         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8022         unsigned long flags;
8023
8024         if (!priv)
8025                 return;
8026
8027         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8028
8029         set_bit(STATUS_EXIT_PENDING, &priv->status);
8030
8031         iwl3945_down(priv);
8032
8033         /* make sure we flush any pending irq or
8034          * tasklet for the driver
8035          */
8036         spin_lock_irqsave(&priv->lock, flags);
8037         iwl3945_disable_interrupts(priv);
8038         spin_unlock_irqrestore(&priv->lock, flags);
8039
8040         iwl_synchronize_irq(priv);
8041
8042         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8043
8044         iwl3945_rfkill_unregister(priv);
8045         iwl3945_dealloc_ucode_pci(priv);
8046
8047         if (priv->rxq.bd)
8048                 iwl3945_rx_queue_free(priv, &priv->rxq);
8049         iwl3945_hw_txq_ctx_free(priv);
8050
8051         iwl3945_unset_hw_setting(priv);
8052         iwl3945_clear_stations_table(priv);
8053
8054         if (priv->mac80211_registered)
8055                 ieee80211_unregister_hw(priv->hw);
8056
8057         /*netif_stop_queue(dev); */
8058         flush_workqueue(priv->workqueue);
8059
8060         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8061          * priv->workqueue... so we can't take down the workqueue
8062          * until now... */
8063         destroy_workqueue(priv->workqueue);
8064         priv->workqueue = NULL;
8065
8066         pci_iounmap(pdev, priv->hw_base);
8067         pci_release_regions(pdev);
8068         pci_disable_device(pdev);
8069         pci_set_drvdata(pdev, NULL);
8070
8071         iwl3945_free_channel_map(priv);
8072         iwl3945_free_geos(priv);
8073         kfree(priv->scan);
8074         if (priv->ibss_beacon)
8075                 dev_kfree_skb(priv->ibss_beacon);
8076
8077         ieee80211_free_hw(priv->hw);
8078 }
8079
8080 #ifdef CONFIG_PM
8081
8082 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8083 {
8084         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8085
8086         if (priv->is_open) {
8087                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8088                 iwl3945_mac_stop(priv->hw);
8089                 priv->is_open = 1;
8090         }
8091
8092         pci_set_power_state(pdev, PCI_D3hot);
8093
8094         return 0;
8095 }
8096
8097 static int iwl3945_pci_resume(struct pci_dev *pdev)
8098 {
8099         struct iwl3945_priv *priv = pci_get_drvdata(pdev);
8100
8101         pci_set_power_state(pdev, PCI_D0);
8102
8103         if (priv->is_open)
8104                 iwl3945_mac_start(priv->hw);
8105
8106         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8107         return 0;
8108 }
8109
8110 #endif /* CONFIG_PM */
8111
8112 /*************** RFKILL FUNCTIONS **********/
8113 #ifdef CONFIG_IWL3945_RFKILL
8114 /* software rf-kill from user */
8115 static int iwl3945_rfkill_soft_rf_kill(void *data, enum rfkill_state state)
8116 {
8117         struct iwl3945_priv *priv = data;
8118         int err = 0;
8119
8120         if (!priv->rfkill)
8121         return 0;
8122
8123         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
8124                 return 0;
8125
8126         IWL_DEBUG_RF_KILL("we received soft RFKILL set to state %d\n", state);
8127         mutex_lock(&priv->mutex);
8128
8129         switch (state) {
8130         case RFKILL_STATE_UNBLOCKED:
8131                 if (iwl3945_is_rfkill_hw(priv)) {
8132                         err = -EBUSY;
8133                         goto out_unlock;
8134                 }
8135                 iwl3945_radio_kill_sw(priv, 0);
8136                 break;
8137         case RFKILL_STATE_SOFT_BLOCKED:
8138                 iwl3945_radio_kill_sw(priv, 1);
8139                 break;
8140         default:
8141                 IWL_WARNING("we received unexpected RFKILL state %d\n", state);
8142                 break;
8143         }
8144 out_unlock:
8145         mutex_unlock(&priv->mutex);
8146
8147         return err;
8148 }
8149
8150 int iwl3945_rfkill_init(struct iwl3945_priv *priv)
8151 {
8152         struct device *device = wiphy_dev(priv->hw->wiphy);
8153         int ret = 0;
8154
8155         BUG_ON(device == NULL);
8156
8157         IWL_DEBUG_RF_KILL("Initializing RFKILL.\n");
8158         priv->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
8159         if (!priv->rfkill) {
8160                 IWL_ERROR("Unable to allocate rfkill device.\n");
8161                 ret = -ENOMEM;
8162                 goto error;
8163         }
8164
8165         priv->rfkill->name = priv->cfg->name;
8166         priv->rfkill->data = priv;
8167         priv->rfkill->state = RFKILL_STATE_UNBLOCKED;
8168         priv->rfkill->toggle_radio = iwl3945_rfkill_soft_rf_kill;
8169         priv->rfkill->user_claim_unsupported = 1;
8170
8171         priv->rfkill->dev.class->suspend = NULL;
8172         priv->rfkill->dev.class->resume = NULL;
8173
8174         ret = rfkill_register(priv->rfkill);
8175         if (ret) {
8176                 IWL_ERROR("Unable to register rfkill: %d\n", ret);
8177                 goto freed_rfkill;
8178         }
8179
8180         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8181         return ret;
8182
8183 freed_rfkill:
8184         if (priv->rfkill != NULL)
8185                 rfkill_free(priv->rfkill);
8186         priv->rfkill = NULL;
8187
8188 error:
8189         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8190         return ret;
8191 }
8192
8193 void iwl3945_rfkill_unregister(struct iwl3945_priv *priv)
8194 {
8195         if (priv->rfkill)
8196                 rfkill_unregister(priv->rfkill);
8197
8198         priv->rfkill = NULL;
8199 }
8200
8201 /* set rf-kill to the right state. */
8202 void iwl3945_rfkill_set_hw_state(struct iwl3945_priv *priv)
8203 {
8204
8205         if (!priv->rfkill)
8206                 return;
8207
8208         if (iwl3945_is_rfkill_hw(priv)) {
8209                 rfkill_force_state(priv->rfkill, RFKILL_STATE_HARD_BLOCKED);
8210                 return;
8211         }
8212
8213         if (!iwl3945_is_rfkill_sw(priv))
8214                 rfkill_force_state(priv->rfkill, RFKILL_STATE_UNBLOCKED);
8215         else
8216                 rfkill_force_state(priv->rfkill, RFKILL_STATE_SOFT_BLOCKED);
8217 }
8218 #endif
8219
8220 /*****************************************************************************
8221  *
8222  * driver and module entry point
8223  *
8224  *****************************************************************************/
8225
8226 static struct pci_driver iwl3945_driver = {
8227         .name = DRV_NAME,
8228         .id_table = iwl3945_hw_card_ids,
8229         .probe = iwl3945_pci_probe,
8230         .remove = __devexit_p(iwl3945_pci_remove),
8231 #ifdef CONFIG_PM
8232         .suspend = iwl3945_pci_suspend,
8233         .resume = iwl3945_pci_resume,
8234 #endif
8235 };
8236
8237 static int __init iwl3945_init(void)
8238 {
8239
8240         int ret;
8241         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8242         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8243
8244         ret = iwl3945_rate_control_register();
8245         if (ret) {
8246                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8247                 return ret;
8248         }
8249
8250         ret = pci_register_driver(&iwl3945_driver);
8251         if (ret) {
8252                 IWL_ERROR("Unable to initialize PCI module\n");
8253                 goto error_register;
8254         }
8255 #ifdef CONFIG_IWL3945_DEBUG
8256         ret = driver_create_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8257         if (ret) {
8258                 IWL_ERROR("Unable to create driver sysfs file\n");
8259                 goto error_debug;
8260         }
8261 #endif
8262
8263         return ret;
8264
8265 #ifdef CONFIG_IWL3945_DEBUG
8266 error_debug:
8267         pci_unregister_driver(&iwl3945_driver);
8268 #endif
8269 error_register:
8270         iwl3945_rate_control_unregister();
8271         return ret;
8272 }
8273
8274 static void __exit iwl3945_exit(void)
8275 {
8276 #ifdef CONFIG_IWL3945_DEBUG
8277         driver_remove_file(&iwl3945_driver.driver, &driver_attr_debug_level);
8278 #endif
8279         pci_unregister_driver(&iwl3945_driver);
8280         iwl3945_rate_control_unregister();
8281 }
8282
8283 MODULE_FIRMWARE("iwlwifi-3945" IWL3945_UCODE_API ".ucode");
8284
8285 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8286 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8287 module_param_named(disable, iwl3945_param_disable, int, 0444);
8288 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8289 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8290 MODULE_PARM_DESC(hwcrypto,
8291                  "using hardware crypto engine (default 0 [software])\n");
8292 module_param_named(debug, iwl3945_param_debug, int, 0444);
8293 MODULE_PARM_DESC(debug, "debug output mask");
8294 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8295 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8296
8297 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8298 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8299
8300 /* QoS */
8301 module_param_named(qos_enable, iwl3945_param_qos_enable, int, 0444);
8302 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
8303
8304 module_exit(iwl3945_exit);
8305 module_init(iwl3945_init);