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  *  Intel Linux Wireless <ilw@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 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-commands.h"
  52 #include "iwl-3945.h"
  53 #include "iwl-3945-fh.h"
  54 #include "iwl-helpers.h"
  55 #include "iwl-core.h"
  56 #include "iwl-dev.h"
  57
  58 static int iwl3945_tx_queue_update_write_ptr(struct iwl_priv *priv,
  59                                   struct iwl3945_tx_queue *txq);
  60
  61 /******************************************************************************
  62  *
  63  * module boiler plate
  64  *
  65  ******************************************************************************/
  66
  67 /* module parameters */
  68 static int iwl3945_param_disable_hw_scan; /* def: 0 = use 3945's h/w scan */
  69 static u32 iwl3945_param_debug;    /* def: 0 = minimal debug log messages */
  70 static int iwl3945_param_disable;  /* def: 0 = enable radio */
  71 static int iwl3945_param_antenna;  /* def: 0 = both antennas (use diversity) */
  72 int iwl3945_param_hwcrypto;        /* def: 0 = use software encryption */
  73 int iwl3945_param_queues_num = IWL39_MAX_NUM_QUEUES; /* def: 8 Tx queues */
  74
  75 /*
  76  * module name, copyright, version, etc.
  77  */
  78
  79 #define DRV_DESCRIPTION \
  80 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  81
  82 #ifdef CONFIG_IWL3945_DEBUG
  83 #define VD "d"
  84 #else
  85 #define VD
  86 #endif
  87
  88 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  89 #define VS "s"
  90 #else
  91 #define VS
  92 #endif
  93
  94 #define IWL39_VERSION "1.2.26k" VD VS
  95 #define DRV_COPYRIGHT   "Copyright(c) 2003-2008 Intel Corporation"
  96 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  97 #define DRV_VERSION     IWL39_VERSION
  98
  99
 100 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 101 MODULE_VERSION(DRV_VERSION);
 102 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
 103 MODULE_LICENSE("GPL");
 104
 105 static const struct ieee80211_supported_band *iwl3945_get_band(
 106                 struct iwl_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_x2_queue_used(const struct iwl_queue *q, int i)
 137 {
 138         return q->write_ptr > q->read_ptr ?
 139                 (i >= q->read_ptr && i < q->write_ptr) :
 140                 !(i < q->read_ptr && i >= q->write_ptr);
 141 }
 142
 143 /**
 144  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 145  */
 146 static int iwl3945_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
 147                           int count, int slots_num, u32 id)
 148 {
 149         q->n_bd = count;
 150         q->n_window = slots_num;
 151         q->id = id;
 152
 153         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 154          * and iwl_queue_dec_wrap are broken. */
 155         BUG_ON(!is_power_of_2(count));
 156
 157         /* slots_num must be power-of-two size, otherwise
 158          * get_cmd_index is broken. */
 159         BUG_ON(!is_power_of_2(slots_num));
 160
 161         q->low_mark = q->n_window / 4;
 162         if (q->low_mark < 4)
 163                 q->low_mark = 4;
 164
 165         q->high_mark = q->n_window / 8;
 166         if (q->high_mark < 2)
 167                 q->high_mark = 2;
 168
 169         q->write_ptr = q->read_ptr = 0;
 170
 171         return 0;
 172 }
 173
 174 /**
 175  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 176  */
 177 static int iwl3945_tx_queue_alloc(struct iwl_priv *priv,
 178                               struct iwl3945_tx_queue *txq, u32 id)
 179 {
 180         struct pci_dev *dev = priv->pci_dev;
 181
 182         /* Driver private data, only for Tx (not command) queues,
 183          * not shared with device. */
 184         if (id != IWL_CMD_QUEUE_NUM) {
 185                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 186                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 187                 if (!txq->txb) {
 188                         IWL_ERROR("kmalloc for auxiliary BD "
 189                                   "structures failed\n");
 190                         goto error;
 191                 }
 192         } else
 193                 txq->txb = NULL;
 194
 195         /* Circular buffer of transmit frame descriptors (TFDs),
 196          * shared with device */
 197         txq->bd = pci_alloc_consistent(dev,
 198                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 199                         &txq->q.dma_addr);
 200
 201         if (!txq->bd) {
 202                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 203                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 204                 goto error;
 205         }
 206         txq->q.id = id;
 207
 208         return 0;
 209
 210  error:
 211         kfree(txq->txb);
 212         txq->txb = NULL;
 213
 214         return -ENOMEM;
 215 }
 216
 217 /**
 218  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 219  */
 220 int iwl3945_tx_queue_init(struct iwl_priv *priv,
 221                       struct iwl3945_tx_queue *txq, int slots_num, u32 txq_id)
 222 {
 223         struct pci_dev *dev = priv->pci_dev;
 224         int len;
 225         int rc = 0;
 226
 227         /*
 228          * Alloc buffer array for commands (Tx or other types of commands).
 229          * For the command queue (#4), allocate command space + one big
 230          * command for scan, since scan command is very huge; the system will
 231          * not have two scans at the same time, so only one is needed.
 232          * For data Tx queues (all other queues), no super-size command
 233          * space is needed.
 234          */
 235         len = sizeof(struct iwl3945_cmd) * slots_num;
 236         if (txq_id == IWL_CMD_QUEUE_NUM)
 237                 len +=  IWL_MAX_SCAN_SIZE;
 238         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 239         if (!txq->cmd)
 240                 return -ENOMEM;
 241
 242         /* Alloc driver data array and TFD circular buffer */
 243         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 244         if (rc) {
 245                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 246
 247                 return -ENOMEM;
 248         }
 249         txq->need_update = 0;
 250
 251         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 252          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 253         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 254
 255         /* Initialize queue high/low-water, head/tail indexes */
 256         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 257
 258         /* Tell device where to find queue, enable DMA channel. */
 259         iwl3945_hw_tx_queue_init(priv, txq);
 260
 261         return 0;
 262 }
 263
 264 /**
 265  * iwl3945_tx_queue_free - Deallocate DMA queue.
 266  * @txq: Transmit queue to deallocate.
 267  *
 268  * Empty queue by removing and destroying all BD's.
 269  * Free all buffers.
 270  * 0-fill, but do not free "txq" descriptor structure.
 271  */
 272 void iwl3945_tx_queue_free(struct iwl_priv *priv, struct iwl3945_tx_queue *txq)
 273 {
 274         struct iwl_queue *q = &txq->q;
 275         struct pci_dev *dev = priv->pci_dev;
 276         int len;
 277
 278         if (q->n_bd == 0)
 279                 return;
 280
 281         /* first, empty all BD's */
 282         for (; q->write_ptr != q->read_ptr;
 283              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 284                 iwl3945_hw_txq_free_tfd(priv, txq);
 285
 286         len = sizeof(struct iwl3945_cmd) * q->n_window;
 287         if (q->id == IWL_CMD_QUEUE_NUM)
 288                 len += IWL_MAX_SCAN_SIZE;
 289
 290         /* De-alloc array of command/tx buffers */
 291         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 292
 293         /* De-alloc circular buffer of TFDs */
 294         if (txq->q.n_bd)
 295                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
 296                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 297
 298         /* De-alloc array of per-TFD driver data */
 299         kfree(txq->txb);
 300         txq->txb = NULL;
 301
 302         /* 0-fill queue descriptor structure */
 303         memset(txq, 0, sizeof(*txq));
 304 }
 305
 306 /*************** STATION TABLE MANAGEMENT ****
 307  * mac80211 should be examined to determine if sta_info is duplicating
 308  * the functionality provided here
 309  */
 310
 311 /**************************************************************/
 312 #if 0 /* temporary disable till we add real remove station */
 313 /**
 314  * iwl3945_remove_station - Remove driver's knowledge of station.
 315  *
 316  * NOTE:  This does not remove station from device's station table.
 317  */
 318 static u8 iwl3945_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 319 {
 320         int index = IWL_INVALID_STATION;
 321         int i;
 322         unsigned long flags;
 323
 324         spin_lock_irqsave(&priv->sta_lock, flags);
 325
 326         if (is_ap)
 327                 index = IWL_AP_ID;
 328         else if (is_broadcast_ether_addr(addr))
 329                 index = priv->hw_params.bcast_sta_id;
 330         else
 331                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 332                         if (priv->stations_39[i].used &&
 333                             !compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 334                                                 addr)) {
 335                                 index = i;
 336                                 break;
 337                         }
 338
 339         if (unlikely(index == IWL_INVALID_STATION))
 340                 goto out;
 341
 342         if (priv->stations_39[index].used) {
 343                 priv->stations_39[index].used = 0;
 344                 priv->num_stations--;
 345         }
 346
 347         BUG_ON(priv->num_stations < 0);
 348
 349 out:
 350         spin_unlock_irqrestore(&priv->sta_lock, flags);
 351         return 0;
 352 }
 353 #endif
 354
 355 /**
 356  * iwl3945_clear_stations_table - Clear the driver's station table
 357  *
 358  * NOTE:  This does not clear or otherwise alter the device's station table.
 359  */
 360 static void iwl3945_clear_stations_table(struct iwl_priv *priv)
 361 {
 362         unsigned long flags;
 363
 364         spin_lock_irqsave(&priv->sta_lock, flags);
 365
 366         priv->num_stations = 0;
 367         memset(priv->stations_39, 0, sizeof(priv->stations_39));
 368
 369         spin_unlock_irqrestore(&priv->sta_lock, flags);
 370 }
 371
 372 /**
 373  * iwl3945_add_station - Add station to station tables in driver and device
 374  */
 375 u8 iwl3945_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
 376 {
 377         int i;
 378         int index = IWL_INVALID_STATION;
 379         struct iwl3945_station_entry *station;
 380         unsigned long flags_spin;
 381         u8 rate;
 382
 383         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 384         if (is_ap)
 385                 index = IWL_AP_ID;
 386         else if (is_broadcast_ether_addr(addr))
 387                 index = priv->hw_params.bcast_sta_id;
 388         else
 389                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 390                         if (!compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 391                                                 addr)) {
 392                                 index = i;
 393                                 break;
 394                         }
 395
 396                         if (!priv->stations_39[i].used &&
 397                             index == IWL_INVALID_STATION)
 398                                 index = i;
 399                 }
 400
 401         /* These two conditions has the same outcome but keep them separate
 402           since they have different meaning */
 403         if (unlikely(index == IWL_INVALID_STATION)) {
 404                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 405                 return index;
 406         }
 407
 408         if (priv->stations_39[index].used &&
 409            !compare_ether_addr(priv->stations_39[index].sta.sta.addr, addr)) {
 410                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 411                 return index;
 412         }
 413
 414         IWL_DEBUG_ASSOC("Add STA ID %d: %pM\n", index, addr);
 415         station = &priv->stations_39[index];
 416         station->used = 1;
 417         priv->num_stations++;
 418
 419         /* Set up the REPLY_ADD_STA command to send to device */
 420         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 421         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 422         station->sta.mode = 0;
 423         station->sta.sta.sta_id = index;
 424         station->sta.station_flags = 0;
 425
 426         if (priv->band == IEEE80211_BAND_5GHZ)
 427                 rate = IWL_RATE_6M_PLCP;
 428         else
 429                 rate =  IWL_RATE_1M_PLCP;
 430
 431         /* Turn on both antennas for the station... */
 432         station->sta.rate_n_flags =
 433                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 434
 435         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 436
 437         /* Add station to device's station table */
 438         iwl3945_send_add_station(priv, &station->sta, flags);
 439         return index;
 440
 441 }
 442
 443 /*************** DRIVER STATUS FUNCTIONS   *****/
 444
 445 static inline int iwl3945_is_ready(struct iwl_priv *priv)
 446 {
 447         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 448          * set but EXIT_PENDING is not */
 449         return test_bit(STATUS_READY, &priv->status) &&
 450                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 451                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 452 }
 453
 454 static inline int iwl3945_is_alive(struct iwl_priv *priv)
 455 {
 456         return test_bit(STATUS_ALIVE, &priv->status);
 457 }
 458
 459 static inline int iwl3945_is_init(struct iwl_priv *priv)
 460 {
 461         return test_bit(STATUS_INIT, &priv->status);
 462 }
 463
 464 static inline int iwl3945_is_rfkill_sw(struct iwl_priv *priv)
 465 {
 466         return test_bit(STATUS_RF_KILL_SW, &priv->status);
 467 }
 468
 469 static inline int iwl3945_is_rfkill_hw(struct iwl_priv *priv)
 470 {
 471         return test_bit(STATUS_RF_KILL_HW, &priv->status);
 472 }
 473
 474 static inline int iwl3945_is_rfkill(struct iwl_priv *priv)
 475 {
 476         return iwl3945_is_rfkill_hw(priv) ||
 477                 iwl3945_is_rfkill_sw(priv);
 478 }
 479
 480 static inline int iwl3945_is_ready_rf(struct iwl_priv *priv)
 481 {
 482
 483         if (iwl3945_is_rfkill(priv))
 484                 return 0;
 485
 486         return iwl3945_is_ready(priv);
 487 }
 488
 489 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 490
 491 #define IWL_CMD(x) case x: return #x
 492 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 493
 494 /**
 495  * iwl3945_enqueue_hcmd - enqueue a uCode command
 496  * @priv: device private data point
 497  * @cmd: a point to the ucode command structure
 498  *
 499  * The function returns < 0 values to indicate the operation is
 500  * failed. On success, it turns the index (> 0) of command in the
 501  * command queue.
 502  */
 503 static int iwl3945_enqueue_hcmd(struct iwl_priv *priv, struct iwl3945_host_cmd *cmd)
 504 {
 505         struct iwl3945_tx_queue *txq = &priv->txq39[IWL_CMD_QUEUE_NUM];
 506         struct iwl_queue *q = &txq->q;
 507         struct iwl3945_tfd_frame *tfd;
 508         u32 *control_flags;
 509         struct iwl3945_cmd *out_cmd;
 510         u32 idx;
 511         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 512         dma_addr_t phys_addr;
 513         int pad;
 514         u16 count;
 515         int ret;
 516         unsigned long flags;
 517
 518         /* If any of the command structures end up being larger than
 519          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 520          * we will need to increase the size of the TFD entries */
 521         BUG_ON((fix_size > TFD39_MAX_PAYLOAD_SIZE) &&
 522                !(cmd->meta.flags & CMD_SIZE_HUGE));
 523
 524
 525         if (iwl3945_is_rfkill(priv)) {
 526                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 527                 return -EIO;
 528         }
 529
 530         if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 531                 IWL_ERROR("No space for Tx\n");
 532                 return -ENOSPC;
 533         }
 534
 535         spin_lock_irqsave(&priv->hcmd_lock, flags);
 536
 537         tfd = &txq->bd[q->write_ptr];
 538         memset(tfd, 0, sizeof(*tfd));
 539
 540         control_flags = (u32 *) tfd;
 541
 542         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 543         out_cmd = &txq->cmd[idx];
 544
 545         out_cmd->hdr.cmd = cmd->id;
 546         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 547         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 548
 549         /* At this point, the out_cmd now has all of the incoming cmd
 550          * information */
 551
 552         out_cmd->hdr.flags = 0;
 553         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 554                         INDEX_TO_SEQ(q->write_ptr));
 555         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 556                 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
 557
 558         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 559                         offsetof(struct iwl3945_cmd, hdr);
 560         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 561
 562         pad = U32_PAD(cmd->len);
 563         count = TFD_CTL_COUNT_GET(*control_flags);
 564         *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
 565
 566         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 567                      "%d bytes at %d[%d]:%d\n",
 568                      get_cmd_string(out_cmd->hdr.cmd),
 569                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 570                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 571
 572         txq->need_update = 1;
 573
 574         /* Increment and update queue's write index */
 575         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 576         ret = iwl3945_tx_queue_update_write_ptr(priv, txq);
 577
 578         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 579         return ret ? ret : idx;
 580 }
 581
 582 static int iwl3945_send_cmd_async(struct iwl_priv *priv, struct iwl3945_host_cmd *cmd)
 583 {
 584         int ret;
 585
 586         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 587
 588         /* An asynchronous command can not expect an SKB to be set. */
 589         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 590
 591         /* An asynchronous command MUST have a callback. */
 592         BUG_ON(!cmd->meta.u.callback);
 593
 594         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 595                 return -EBUSY;
 596
 597         ret = iwl3945_enqueue_hcmd(priv, cmd);
 598         if (ret < 0) {
 599                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 600                           get_cmd_string(cmd->id), ret);
 601                 return ret;
 602         }
 603         return 0;
 604 }
 605
 606 static int iwl3945_send_cmd_sync(struct iwl_priv *priv, struct iwl3945_host_cmd *cmd)
 607 {
 608         int cmd_idx;
 609         int ret;
 610
 611         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 612
 613          /* A synchronous command can not have a callback set. */
 614         BUG_ON(cmd->meta.u.callback != NULL);
 615
 616         if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
 617                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 618                           get_cmd_string(cmd->id));
 619                 ret = -EBUSY;
 620                 goto out;
 621         }
 622
 623         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 624
 625         if (cmd->meta.flags & CMD_WANT_SKB)
 626                 cmd->meta.source = &cmd->meta;
 627
 628         cmd_idx = iwl3945_enqueue_hcmd(priv, cmd);
 629         if (cmd_idx < 0) {
 630                 ret = cmd_idx;
 631                 IWL_ERROR("Error sending %s: iwl3945_enqueue_hcmd failed: %d\n",
 632                           get_cmd_string(cmd->id), ret);
 633                 goto out;
 634         }
 635
 636         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 637                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 638                         HOST_COMPLETE_TIMEOUT);
 639         if (!ret) {
 640                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 641                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 642                                   get_cmd_string(cmd->id),
 643                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 644
 645                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 646                         ret = -ETIMEDOUT;
 647                         goto cancel;
 648                 }
 649         }
 650
 651         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 652                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 653                                get_cmd_string(cmd->id));
 654                 ret = -ECANCELED;
 655                 goto fail;
 656         }
 657         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 658                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 659                                get_cmd_string(cmd->id));
 660                 ret = -EIO;
 661                 goto fail;
 662         }
 663         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 664                 IWL_ERROR("Error: Response NULL in '%s'\n",
 665                           get_cmd_string(cmd->id));
 666                 ret = -EIO;
 667                 goto cancel;
 668         }
 669
 670         ret = 0;
 671         goto out;
 672
 673 cancel:
 674         if (cmd->meta.flags & CMD_WANT_SKB) {
 675                 struct iwl3945_cmd *qcmd;
 676
 677                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 678                  * TX cmd queue. Otherwise in case the cmd comes
 679                  * in later, it will possibly set an invalid
 680                  * address (cmd->meta.source). */
 681                 qcmd = &priv->txq39[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 682                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 683         }
 684 fail:
 685         if (cmd->meta.u.skb) {
 686                 dev_kfree_skb_any(cmd->meta.u.skb);
 687                 cmd->meta.u.skb = NULL;
 688         }
 689 out:
 690         clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
 691         return ret;
 692 }
 693
 694 int iwl3945_send_cmd(struct iwl_priv *priv, struct iwl3945_host_cmd *cmd)
 695 {
 696         if (cmd->meta.flags & CMD_ASYNC)
 697                 return iwl3945_send_cmd_async(priv, cmd);
 698
 699         return iwl3945_send_cmd_sync(priv, cmd);
 700 }
 701
 702 int iwl3945_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
 703 {
 704         struct iwl3945_host_cmd cmd = {
 705                 .id = id,
 706                 .len = len,
 707                 .data = data,
 708         };
 709
 710         return iwl3945_send_cmd_sync(priv, &cmd);
 711 }
 712
 713 static int __must_check iwl3945_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
 714 {
 715         struct iwl3945_host_cmd cmd = {
 716                 .id = id,
 717                 .len = sizeof(val),
 718                 .data = &val,
 719         };
 720
 721         return iwl3945_send_cmd_sync(priv, &cmd);
 722 }
 723
 724 int iwl3945_send_statistics_request(struct iwl_priv *priv)
 725 {
 726         return iwl3945_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 727 }
 728
 729 /**
 730  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 731  * @band: 2.4 or 5 GHz band
 732  * @channel: Any channel valid for the requested band
 733
 734  * In addition to setting the staging RXON, priv->band is also set.
 735  *
 736  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 737  * in the staging RXON flag structure based on the band
 738  */
 739 static int iwl3945_set_rxon_channel(struct iwl_priv *priv,
 740                                     enum ieee80211_band band,
 741                                     u16 channel)
 742 {
 743         if (!iwl3945_get_channel_info(priv, band, channel)) {
 744                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 745                                channel, band);
 746                 return -EINVAL;
 747         }
 748
 749         if ((le16_to_cpu(priv->staging39_rxon.channel) == channel) &&
 750             (priv->band == band))
 751                 return 0;
 752
 753         priv->staging39_rxon.channel = cpu_to_le16(channel);
 754         if (band == IEEE80211_BAND_5GHZ)
 755                 priv->staging39_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 756         else
 757                 priv->staging39_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 758
 759         priv->band = band;
 760
 761         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 762
 763         return 0;
 764 }
 765
 766 /**
 767  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 768  *
 769  * NOTE:  This is really only useful during development and can eventually
 770  * be #ifdef'd out once the driver is stable and folks aren't actively
 771  * making changes
 772  */
 773 static int iwl3945_check_rxon_cmd(struct iwl_priv *priv)
 774 {
 775         int error = 0;
 776         int counter = 1;
 777         struct iwl3945_rxon_cmd *rxon = &priv->staging39_rxon;
 778
 779         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 780                 error |= le32_to_cpu(rxon->flags &
 781                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 782                                  RXON_FLG_RADAR_DETECT_MSK));
 783                 if (error)
 784                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 785                                     counter++, error);
 786         } else {
 787                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 788                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 789                 if (error)
 790                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 791                                     counter++, error);
 792                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 793                 if (error)
 794                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 795                                     counter++, error);
 796         }
 797         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 798         if (error)
 799                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 800
 801         /* make sure basic rates 6Mbps and 1Mbps are supported */
 802         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 803                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 804         if (error)
 805                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 806
 807         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 808         if (error)
 809                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 810
 811         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 812                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 813         if (error)
 814                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 815                             counter++, error);
 816
 817         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 818                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 819         if (error)
 820                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 821                             counter++, error);
 822
 823         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 824                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 825         if (error)
 826                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 827                             counter++, error);
 828
 829         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 830                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 831                                 RXON_FLG_ANT_A_MSK)) == 0);
 832         if (error)
 833                 IWL_WARN(priv, "check antenna %d %d\n", counter++, error);
 834
 835         if (error)
 836                 IWL_WARN(priv, "Tuning to channel %d\n",
 837                             le16_to_cpu(rxon->channel));
 838
 839         if (error) {
 840                 IWL_ERROR("Not a valid iwl3945_rxon_assoc_cmd field values\n");
 841                 return -1;
 842         }
 843         return 0;
 844 }
 845
 846 /**
 847  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 848  * @priv: staging_rxon is compared to active_rxon
 849  *
 850  * If the RXON structure is changing enough to require a new tune,
 851  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 852  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 853  */
 854 static int iwl3945_full_rxon_required(struct iwl_priv *priv)
 855 {
 856
 857         /* These items are only settable from the full RXON command */
 858         if (!(iwl3945_is_associated(priv)) ||
 859             compare_ether_addr(priv->staging39_rxon.bssid_addr,
 860                                priv->active39_rxon.bssid_addr) ||
 861             compare_ether_addr(priv->staging39_rxon.node_addr,
 862                                priv->active39_rxon.node_addr) ||
 863             compare_ether_addr(priv->staging39_rxon.wlap_bssid_addr,
 864                                priv->active39_rxon.wlap_bssid_addr) ||
 865             (priv->staging39_rxon.dev_type != priv->active39_rxon.dev_type) ||
 866             (priv->staging39_rxon.channel != priv->active39_rxon.channel) ||
 867             (priv->staging39_rxon.air_propagation !=
 868              priv->active39_rxon.air_propagation) ||
 869             (priv->staging39_rxon.assoc_id != priv->active39_rxon.assoc_id))
 870                 return 1;
 871
 872         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 873          * be updated with the RXON_ASSOC command -- however only some
 874          * flag transitions are allowed using RXON_ASSOC */
 875
 876         /* Check if we are not switching bands */
 877         if ((priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 878             (priv->active39_rxon.flags & RXON_FLG_BAND_24G_MSK))
 879                 return 1;
 880
 881         /* Check if we are switching association toggle */
 882         if ((priv->staging39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 883                 (priv->active39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 884                 return 1;
 885
 886         return 0;
 887 }
 888
 889 static int iwl3945_send_rxon_assoc(struct iwl_priv *priv)
 890 {
 891         int rc = 0;
 892         struct iwl_rx_packet *res = NULL;
 893         struct iwl3945_rxon_assoc_cmd rxon_assoc;
 894         struct iwl3945_host_cmd cmd = {
 895                 .id = REPLY_RXON_ASSOC,
 896                 .len = sizeof(rxon_assoc),
 897                 .meta.flags = CMD_WANT_SKB,
 898                 .data = &rxon_assoc,
 899         };
 900         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging39_rxon;
 901         const struct iwl3945_rxon_cmd *rxon2 = &priv->active39_rxon;
 902
 903         if ((rxon1->flags == rxon2->flags) &&
 904             (rxon1->filter_flags == rxon2->filter_flags) &&
 905             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 906             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 907                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
 908                 return 0;
 909         }
 910
 911         rxon_assoc.flags = priv->staging39_rxon.flags;
 912         rxon_assoc.filter_flags = priv->staging39_rxon.filter_flags;
 913         rxon_assoc.ofdm_basic_rates = priv->staging39_rxon.ofdm_basic_rates;
 914         rxon_assoc.cck_basic_rates = priv->staging39_rxon.cck_basic_rates;
 915         rxon_assoc.reserved = 0;
 916
 917         rc = iwl3945_send_cmd_sync(priv, &cmd);
 918         if (rc)
 919                 return rc;
 920
 921         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 922         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 923                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
 924                 rc = -EIO;
 925         }
 926
 927         priv->alloc_rxb_skb--;
 928         dev_kfree_skb_any(cmd.meta.u.skb);
 929
 930         return rc;
 931 }
 932
 933 /**
 934  * iwl3945_commit_rxon - commit staging_rxon to hardware
 935  *
 936  * The RXON command in staging_rxon is committed to the hardware and
 937  * the active_rxon structure is updated with the new data.  This
 938  * function correctly transitions out of the RXON_ASSOC_MSK state if
 939  * a HW tune is required based on the RXON structure changes.
 940  */
 941 static int iwl3945_commit_rxon(struct iwl_priv *priv)
 942 {
 943         /* cast away the const for active_rxon in this function */
 944         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active39_rxon;
 945         int rc = 0;
 946
 947         if (!iwl3945_is_alive(priv))
 948                 return -1;
 949
 950         /* always get timestamp with Rx frame */
 951         priv->staging39_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 952
 953         /* select antenna */
 954         priv->staging39_rxon.flags &=
 955             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
 956         priv->staging39_rxon.flags |= iwl3945_get_antenna_flags(priv);
 957
 958         rc = iwl3945_check_rxon_cmd(priv);
 959         if (rc) {
 960                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 961                 return -EINVAL;
 962         }
 963
 964         /* If we don't need to send a full RXON, we can use
 965          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
 966          * and other flags for the current radio configuration. */
 967         if (!iwl3945_full_rxon_required(priv)) {
 968                 rc = iwl3945_send_rxon_assoc(priv);
 969                 if (rc) {
 970                         IWL_ERROR("Error setting RXON_ASSOC "
 971                                   "configuration (%d).\n", rc);
 972                         return rc;
 973                 }
 974
 975                 memcpy(active_rxon, &priv->staging39_rxon, sizeof(*active_rxon));
 976
 977                 return 0;
 978         }
 979
 980         /* If we are currently associated and the new config requires
 981          * an RXON_ASSOC and the new config wants the associated mask enabled,
 982          * we must clear the associated from the active configuration
 983          * before we apply the new config */
 984         if (iwl3945_is_associated(priv) &&
 985             (priv->staging39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 986                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 987                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 988
 989                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
 990                                       sizeof(struct iwl3945_rxon_cmd),
 991                                       &priv->active39_rxon);
 992
 993                 /* If the mask clearing failed then we set
 994                  * active_rxon back to what it was previously */
 995                 if (rc) {
 996                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 997                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 998                                   "configuration (%d).\n", rc);
 999                         return rc;
1000                 }
1001         }
1002
1003         IWL_DEBUG_INFO("Sending RXON\n"
1004                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1005                        "* channel = %d\n"
1006                        "* bssid = %pM\n",
1007                        ((priv->staging39_rxon.filter_flags &
1008                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1009                        le16_to_cpu(priv->staging39_rxon.channel),
1010                        priv->staging_rxon.bssid_addr);
1011
1012         /* Apply the new configuration */
1013         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON,
1014                               sizeof(struct iwl3945_rxon_cmd), &priv->staging39_rxon);
1015         if (rc) {
1016                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1017                 return rc;
1018         }
1019
1020         memcpy(active_rxon, &priv->staging39_rxon, sizeof(*active_rxon));
1021
1022         iwl3945_clear_stations_table(priv);
1023
1024         /* If we issue a new RXON command which required a tune then we must
1025          * send a new TXPOWER command or we won't be able to Tx any frames */
1026         rc = iwl3945_hw_reg_send_txpower(priv);
1027         if (rc) {
1028                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1029                 return rc;
1030         }
1031
1032         /* Add the broadcast address so we can send broadcast frames */
1033         if (iwl3945_add_station(priv, iwl_bcast_addr, 0, 0) ==
1034             IWL_INVALID_STATION) {
1035                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1036                 return -EIO;
1037         }
1038
1039         /* If we have set the ASSOC_MSK and we are in BSS mode then
1040          * add the IWL_AP_ID to the station rate table */
1041         if (iwl3945_is_associated(priv) &&
1042             (priv->iw_mode == NL80211_IFTYPE_STATION))
1043                 if (iwl3945_add_station(priv, priv->active39_rxon.bssid_addr, 1, 0)
1044                     == IWL_INVALID_STATION) {
1045                         IWL_ERROR("Error adding AP address for transmit.\n");
1046                         return -EIO;
1047                 }
1048
1049         /* Init the hardware's rate fallback order based on the band */
1050         rc = iwl3945_init_hw_rate_table(priv);
1051         if (rc) {
1052                 IWL_ERROR("Error setting HW rate table: %02X\n", rc);
1053                 return -EIO;
1054         }
1055
1056         return 0;
1057 }
1058
1059 static int iwl3945_send_bt_config(struct iwl_priv *priv)
1060 {
1061         struct iwl_bt_cmd bt_cmd = {
1062                 .flags = 3,
1063                 .lead_time = 0xAA,
1064                 .max_kill = 1,
1065                 .kill_ack_mask = 0,
1066                 .kill_cts_mask = 0,
1067         };
1068
1069         return iwl3945_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1070                                         sizeof(bt_cmd), &bt_cmd);
1071 }
1072
1073 static int iwl3945_send_scan_abort(struct iwl_priv *priv)
1074 {
1075         int rc = 0;
1076         struct iwl_rx_packet *res;
1077         struct iwl3945_host_cmd cmd = {
1078                 .id = REPLY_SCAN_ABORT_CMD,
1079                 .meta.flags = CMD_WANT_SKB,
1080         };
1081
1082         /* If there isn't a scan actively going on in the hardware
1083          * then we are in between scan bands and not actually
1084          * actively scanning, so don't send the abort command */
1085         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1086                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1087                 return 0;
1088         }
1089
1090         rc = iwl3945_send_cmd_sync(priv, &cmd);
1091         if (rc) {
1092                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1093                 return rc;
1094         }
1095
1096         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1097         if (res->u.status != CAN_ABORT_STATUS) {
1098                 /* The scan abort will return 1 for success or
1099                  * 2 for "failure".  A failure condition can be
1100                  * due to simply not being in an active scan which
1101                  * can occur if we send the scan abort before we
1102                  * the microcode has notified us that a scan is
1103                  * completed. */
1104                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1105                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1106                 clear_bit(STATUS_SCAN_HW, &priv->status);
1107         }
1108
1109         dev_kfree_skb_any(cmd.meta.u.skb);
1110
1111         return rc;
1112 }
1113
1114 static int iwl3945_card_state_sync_callback(struct iwl_priv *priv,
1115                                         struct iwl3945_cmd *cmd,
1116                                         struct sk_buff *skb)
1117 {
1118         return 1;
1119 }
1120
1121 /*
1122  * CARD_STATE_CMD
1123  *
1124  * Use: Sets the device's internal card state to enable, disable, or halt
1125  *
1126  * When in the 'enable' state the card operates as normal.
1127  * When in the 'disable' state, the card enters into a low power mode.
1128  * When in the 'halt' state, the card is shut down and must be fully
1129  * restarted to come back on.
1130  */
1131 static int iwl3945_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1132 {
1133         struct iwl3945_host_cmd cmd = {
1134                 .id = REPLY_CARD_STATE_CMD,
1135                 .len = sizeof(u32),
1136                 .data = &flags,
1137                 .meta.flags = meta_flag,
1138         };
1139
1140         if (meta_flag & CMD_ASYNC)
1141                 cmd.meta.u.callback = iwl3945_card_state_sync_callback;
1142
1143         return iwl3945_send_cmd(priv, &cmd);
1144 }
1145
1146 static int iwl3945_add_sta_sync_callback(struct iwl_priv *priv,
1147                                      struct iwl3945_cmd *cmd, struct sk_buff *skb)
1148 {
1149         struct iwl_rx_packet *res = NULL;
1150
1151         if (!skb) {
1152                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1153                 return 1;
1154         }
1155
1156         res = (struct iwl_rx_packet *)skb->data;
1157         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1158                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1159                           res->hdr.flags);
1160                 return 1;
1161         }
1162
1163         switch (res->u.add_sta.status) {
1164         case ADD_STA_SUCCESS_MSK:
1165                 break;
1166         default:
1167                 break;
1168         }
1169
1170         /* We didn't cache the SKB; let the caller free it */
1171         return 1;
1172 }
1173
1174 int iwl3945_send_add_station(struct iwl_priv *priv,
1175                          struct iwl3945_addsta_cmd *sta, u8 flags)
1176 {
1177         struct iwl_rx_packet *res = NULL;
1178         int rc = 0;
1179         struct iwl3945_host_cmd cmd = {
1180                 .id = REPLY_ADD_STA,
1181                 .len = sizeof(struct iwl3945_addsta_cmd),
1182                 .meta.flags = flags,
1183                 .data = sta,
1184         };
1185
1186         if (flags & CMD_ASYNC)
1187                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
1188         else
1189                 cmd.meta.flags |= CMD_WANT_SKB;
1190
1191         rc = iwl3945_send_cmd(priv, &cmd);
1192
1193         if (rc || (flags & CMD_ASYNC))
1194                 return rc;
1195
1196         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1197         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1198                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1199                           res->hdr.flags);
1200                 rc = -EIO;
1201         }
1202
1203         if (rc == 0) {
1204                 switch (res->u.add_sta.status) {
1205                 case ADD_STA_SUCCESS_MSK:
1206                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1207                         break;
1208                 default:
1209                         rc = -EIO;
1210                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
1211                         break;
1212                 }
1213         }
1214
1215         priv->alloc_rxb_skb--;
1216         dev_kfree_skb_any(cmd.meta.u.skb);
1217
1218         return rc;
1219 }
1220
1221 static int iwl3945_update_sta_key_info(struct iwl_priv *priv,
1222                                    struct ieee80211_key_conf *keyconf,
1223                                    u8 sta_id)
1224 {
1225         unsigned long flags;
1226         __le16 key_flags = 0;
1227
1228         switch (keyconf->alg) {
1229         case ALG_CCMP:
1230                 key_flags |= STA_KEY_FLG_CCMP;
1231                 key_flags |= cpu_to_le16(
1232                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1233                 key_flags &= ~STA_KEY_FLG_INVALID;
1234                 break;
1235         case ALG_TKIP:
1236         case ALG_WEP:
1237         default:
1238                 return -EINVAL;
1239         }
1240         spin_lock_irqsave(&priv->sta_lock, flags);
1241         priv->stations_39[sta_id].keyinfo.alg = keyconf->alg;
1242         priv->stations_39[sta_id].keyinfo.keylen = keyconf->keylen;
1243         memcpy(priv->stations_39[sta_id].keyinfo.key, keyconf->key,
1244                keyconf->keylen);
1245
1246         memcpy(priv->stations_39[sta_id].sta.key.key, keyconf->key,
1247                keyconf->keylen);
1248         priv->stations_39[sta_id].sta.key.key_flags = key_flags;
1249         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1250         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1251
1252         spin_unlock_irqrestore(&priv->sta_lock, flags);
1253
1254         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1255         iwl3945_send_add_station(priv, &priv->stations_39[sta_id].sta, 0);
1256         return 0;
1257 }
1258
1259 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1260 {
1261         unsigned long flags;
1262
1263         spin_lock_irqsave(&priv->sta_lock, flags);
1264         memset(&priv->stations_39[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
1265         memset(&priv->stations_39[sta_id].sta.key, 0,
1266                 sizeof(struct iwl4965_keyinfo));
1267         priv->stations_39[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1268         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1269         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1270         spin_unlock_irqrestore(&priv->sta_lock, flags);
1271
1272         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1273         iwl3945_send_add_station(priv, &priv->stations_39[sta_id].sta, 0);
1274         return 0;
1275 }
1276
1277 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
1278 {
1279         struct list_head *element;
1280
1281         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1282                        priv->frames_count);
1283
1284         while (!list_empty(&priv->free_frames)) {
1285                 element = priv->free_frames.next;
1286                 list_del(element);
1287                 kfree(list_entry(element, struct iwl3945_frame, list));
1288                 priv->frames_count--;
1289         }
1290
1291         if (priv->frames_count) {
1292                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
1293                             priv->frames_count);
1294                 priv->frames_count = 0;
1295         }
1296 }
1297
1298 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
1299 {
1300         struct iwl3945_frame *frame;
1301         struct list_head *element;
1302         if (list_empty(&priv->free_frames)) {
1303                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1304                 if (!frame) {
1305                         IWL_ERROR("Could not allocate frame!\n");
1306                         return NULL;
1307                 }
1308
1309                 priv->frames_count++;
1310                 return frame;
1311         }
1312
1313         element = priv->free_frames.next;
1314         list_del(element);
1315         return list_entry(element, struct iwl3945_frame, list);
1316 }
1317
1318 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
1319 {
1320         memset(frame, 0, sizeof(*frame));
1321         list_add(&frame->list, &priv->free_frames);
1322 }
1323
1324 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
1325                                 struct ieee80211_hdr *hdr,
1326                                 int left)
1327 {
1328
1329         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1330             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
1331              (priv->iw_mode != NL80211_IFTYPE_AP)))
1332                 return 0;
1333
1334         if (priv->ibss_beacon->len > left)
1335                 return 0;
1336
1337         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1338
1339         return priv->ibss_beacon->len;
1340 }
1341
1342 static u8 iwl3945_rate_get_lowest_plcp(struct iwl_priv *priv)
1343 {
1344         u8 i;
1345         int rate_mask;
1346
1347         /* Set rate mask*/
1348         if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK)
1349                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
1350         else
1351                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
1352
1353         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1354              i = iwl3945_rates[i].next_ieee) {
1355                 if (rate_mask & (1 << i))
1356                         return iwl3945_rates[i].plcp;
1357         }
1358
1359         /* No valid rate was found. Assign the lowest one */
1360         if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK)
1361                 return IWL_RATE_1M_PLCP;
1362         else
1363                 return IWL_RATE_6M_PLCP;
1364 }
1365
1366 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
1367 {
1368         struct iwl3945_frame *frame;
1369         unsigned int frame_size;
1370         int rc;
1371         u8 rate;
1372
1373         frame = iwl3945_get_free_frame(priv);
1374
1375         if (!frame) {
1376                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1377                           "command.\n");
1378                 return -ENOMEM;
1379         }
1380
1381         rate = iwl3945_rate_get_lowest_plcp(priv);
1382
1383         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1384
1385         rc = iwl3945_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1386                               &frame->u.cmd[0]);
1387
1388         iwl3945_free_frame(priv, frame);
1389
1390         return rc;
1391 }
1392
1393 /******************************************************************************
1394  *
1395  * EEPROM related functions
1396  *
1397  ******************************************************************************/
1398
1399 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1400 {
1401         memcpy(mac, priv->eeprom39.mac_address, 6);
1402 }
1403
1404 /*
1405  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1406  * embedded controller) as EEPROM reader; each read is a series of pulses
1407  * to/from the EEPROM chip, not a single event, so even reads could conflict
1408  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1409  * simply claims ownership, which should be safe when this function is called
1410  * (i.e. before loading uCode!).
1411  */
1412 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl_priv *priv)
1413 {
1414         _iwl_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1415         return 0;
1416 }
1417
1418 /**
1419  * iwl3945_eeprom_init - read EEPROM contents
1420  *
1421  * Load the EEPROM contents from adapter into priv->eeprom39
1422  *
1423  * NOTE:  This routine uses the non-debug IO access functions.
1424  */
1425 int iwl3945_eeprom_init(struct iwl_priv *priv)
1426 {
1427         u16 *e = (u16 *)&priv->eeprom39;
1428         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1429         int sz = sizeof(priv->eeprom39);
1430         int ret;
1431         u16 addr;
1432
1433         /* The EEPROM structure has several padding buffers within it
1434          * and when adding new EEPROM maps is subject to programmer errors
1435          * which may be very difficult to identify without explicitly
1436          * checking the resulting size of the eeprom map. */
1437         BUILD_BUG_ON(sizeof(priv->eeprom39) != IWL_EEPROM_IMAGE_SIZE);
1438
1439         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1440                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
1441                 return -ENOENT;
1442         }
1443
1444         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1445         ret = iwl3945_eeprom_acquire_semaphore(priv);
1446         if (ret < 0) {
1447                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1448                 return -ENOENT;
1449         }
1450
1451         /* eeprom is an array of 16bit values */
1452         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1453                 u32 r;
1454
1455                 _iwl_write32(priv, CSR_EEPROM_REG,
1456                                  CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
1457                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1458                 ret = iwl_poll_direct_bit(priv, CSR_EEPROM_REG,
1459                                               CSR_EEPROM_REG_READ_VALID_MSK,
1460                                               IWL_EEPROM_ACCESS_TIMEOUT);
1461                 if (ret < 0) {
1462                         IWL_ERROR("Time out reading EEPROM[%d]\n", addr);
1463                         return ret;
1464                 }
1465
1466                 r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
1467                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1468         }
1469
1470         return 0;
1471 }
1472
1473 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
1474 {
1475         if (priv->shared_virt)
1476                 pci_free_consistent(priv->pci_dev,
1477                                     sizeof(struct iwl3945_shared),
1478                                     priv->shared_virt,
1479                                     priv->shared_phys);
1480 }
1481
1482 /**
1483  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1484  *
1485  * return : set the bit for each supported rate insert in ie
1486  */
1487 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1488                                     u16 basic_rate, int *left)
1489 {
1490         u16 ret_rates = 0, bit;
1491         int i;
1492         u8 *cnt = ie;
1493         u8 *rates = ie + 1;
1494
1495         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1496                 if (bit & supported_rate) {
1497                         ret_rates |= bit;
1498                         rates[*cnt] = iwl3945_rates[i].ieee |
1499                                 ((bit & basic_rate) ? 0x80 : 0x00);
1500                         (*cnt)++;
1501                         (*left)--;
1502                         if ((*left <= 0) ||
1503                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1504                                 break;
1505                 }
1506         }
1507
1508         return ret_rates;
1509 }
1510
1511 /**
1512  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1513  */
1514 static u16 iwl3945_fill_probe_req(struct iwl_priv *priv,
1515                               struct ieee80211_mgmt *frame,
1516                               int left)
1517 {
1518         int len = 0;
1519         u8 *pos = NULL;
1520         u16 active_rates, ret_rates, cck_rates;
1521
1522         /* Make sure there is enough space for the probe request,
1523          * two mandatory IEs and the data */
1524         left -= 24;
1525         if (left < 0)
1526                 return 0;
1527         len += 24;
1528
1529         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1530         memcpy(frame->da, iwl_bcast_addr, ETH_ALEN);
1531         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1532         memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN);
1533         frame->seq_ctrl = 0;
1534
1535         /* fill in our indirect SSID IE */
1536         /* ...next IE... */
1537
1538         left -= 2;
1539         if (left < 0)
1540                 return 0;
1541         len += 2;
1542         pos = &(frame->u.probe_req.variable[0]);
1543         *pos++ = WLAN_EID_SSID;
1544         *pos++ = 0;
1545
1546         /* fill in supported rate */
1547         /* ...next IE... */
1548         left -= 2;
1549         if (left < 0)
1550                 return 0;
1551
1552         /* ... fill it in... */
1553         *pos++ = WLAN_EID_SUPP_RATES;
1554         *pos = 0;
1555
1556         priv->active_rate = priv->rates_mask;
1557         active_rates = priv->active_rate;
1558         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1559
1560         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1561         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1562                         priv->active_rate_basic, &left);
1563         active_rates &= ~ret_rates;
1564
1565         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1566                                  priv->active_rate_basic, &left);
1567         active_rates &= ~ret_rates;
1568
1569         len += 2 + *pos;
1570         pos += (*pos) + 1;
1571         if (active_rates == 0)
1572                 goto fill_end;
1573
1574         /* fill in supported extended rate */
1575         /* ...next IE... */
1576         left -= 2;
1577         if (left < 0)
1578                 return 0;
1579         /* ... fill it in... */
1580         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1581         *pos = 0;
1582         iwl3945_supported_rate_to_ie(pos, active_rates,
1583                                  priv->active_rate_basic, &left);
1584         if (*pos > 0)
1585                 len += 2 + *pos;
1586
1587  fill_end:
1588         return (u16)len;
1589 }
1590
1591 /*
1592  * QoS  support
1593 */
1594 static int iwl3945_send_qos_params_command(struct iwl_priv *priv,
1595                                        struct iwl_qosparam_cmd *qos)
1596 {
1597
1598         return iwl3945_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1599                                 sizeof(struct iwl_qosparam_cmd), qos);
1600 }
1601
1602 static void iwl3945_reset_qos(struct iwl_priv *priv)
1603 {
1604         u16 cw_min = 15;
1605         u16 cw_max = 1023;
1606         u8 aifs = 2;
1607         u8 is_legacy = 0;
1608         unsigned long flags;
1609         int i;
1610
1611         spin_lock_irqsave(&priv->lock, flags);
1612         priv->qos_data.qos_active = 0;
1613
1614         /* QoS always active in AP and ADHOC mode
1615          * In STA mode wait for association
1616          */
1617         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
1618             priv->iw_mode == NL80211_IFTYPE_AP)
1619                 priv->qos_data.qos_active = 1;
1620         else
1621                 priv->qos_data.qos_active = 0;
1622
1623
1624         /* check for legacy mode */
1625         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
1626              (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
1627             (priv->iw_mode == NL80211_IFTYPE_STATION &&
1628              (priv->staging39_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
1629                 cw_min = 31;
1630                 is_legacy = 1;
1631         }
1632
1633         if (priv->qos_data.qos_active)
1634                 aifs = 3;
1635
1636         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1637         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1638         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1639         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1640         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1641
1642         if (priv->qos_data.qos_active) {
1643                 i = 1;
1644                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1645                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1646                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1647                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1648                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1649
1650                 i = 2;
1651                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1652                         cpu_to_le16((cw_min + 1) / 2 - 1);
1653                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1654                         cpu_to_le16(cw_max);
1655                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1656                 if (is_legacy)
1657                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1658                                 cpu_to_le16(6016);
1659                 else
1660                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1661                                 cpu_to_le16(3008);
1662                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1663
1664                 i = 3;
1665                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1666                         cpu_to_le16((cw_min + 1) / 4 - 1);
1667                 priv->qos_data.def_qos_parm.ac[i].cw_max =
1668                         cpu_to_le16((cw_max + 1) / 2 - 1);
1669                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
1670                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1671                 if (is_legacy)
1672                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1673                                 cpu_to_le16(3264);
1674                 else
1675                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
1676                                 cpu_to_le16(1504);
1677         } else {
1678                 for (i = 1; i < 4; i++) {
1679                         priv->qos_data.def_qos_parm.ac[i].cw_min =
1680                                 cpu_to_le16(cw_min);
1681                         priv->qos_data.def_qos_parm.ac[i].cw_max =
1682                                 cpu_to_le16(cw_max);
1683                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
1684                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1685                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1686                 }
1687         }
1688         IWL_DEBUG_QOS("set QoS to default \n");
1689
1690         spin_unlock_irqrestore(&priv->lock, flags);
1691 }
1692
1693 static void iwl3945_activate_qos(struct iwl_priv *priv, u8 force)
1694 {
1695         unsigned long flags;
1696
1697         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1698                 return;
1699
1700         spin_lock_irqsave(&priv->lock, flags);
1701         priv->qos_data.def_qos_parm.qos_flags = 0;
1702
1703         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1704             !priv->qos_data.qos_cap.q_AP.txop_request)
1705                 priv->qos_data.def_qos_parm.qos_flags |=
1706                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1707
1708         if (priv->qos_data.qos_active)
1709                 priv->qos_data.def_qos_parm.qos_flags |=
1710                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1711
1712         spin_unlock_irqrestore(&priv->lock, flags);
1713
1714         if (force || iwl3945_is_associated(priv)) {
1715                 IWL_DEBUG_QOS("send QoS cmd with QoS active %d \n",
1716                               priv->qos_data.qos_active);
1717
1718                 iwl3945_send_qos_params_command(priv,
1719                                 &(priv->qos_data.def_qos_parm));
1720         }
1721 }
1722
1723 /*
1724  * Power management (not Tx power!) functions
1725  */
1726 #define MSEC_TO_USEC 1024
1727
1728
1729 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1730 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1731 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1732 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1733                                      __constant_cpu_to_le32(X1), \
1734                                      __constant_cpu_to_le32(X2), \
1735                                      __constant_cpu_to_le32(X3), \
1736                                      __constant_cpu_to_le32(X4)}
1737
1738 /* default power management (not Tx power) table values */
1739 /* for TIM  0-10 */
1740 static struct iwl_power_vec_entry range_0[IWL39_POWER_AC] = {
1741         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1742         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1743         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1744         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1745         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1746         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1747 };
1748
1749 /* for TIM > 10 */
1750 static struct iwl_power_vec_entry range_1[IWL39_POWER_AC] = {
1751         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1752         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1753                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1754         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1755                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1756         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1757                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1758         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1759         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1760                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1761 };
1762
1763 int iwl3945_power_init_handle(struct iwl_priv *priv)
1764 {
1765         int rc = 0, i;
1766         struct iwl3945_power_mgr *pow_data;
1767         int size = sizeof(struct iwl_power_vec_entry) * IWL39_POWER_AC;
1768         u16 pci_pm;
1769
1770         IWL_DEBUG_POWER("Initialize power \n");
1771
1772         pow_data = &(priv->power_data_39);
1773
1774         memset(pow_data, 0, sizeof(*pow_data));
1775
1776         pow_data->active_index = IWL_POWER_RANGE_0;
1777         pow_data->dtim_val = 0xffff;
1778
1779         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1780         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1781
1782         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1783         if (rc != 0)
1784                 return 0;
1785         else {
1786                 struct iwl_powertable_cmd *cmd;
1787
1788                 IWL_DEBUG_POWER("adjust power command flags\n");
1789
1790                 for (i = 0; i < IWL39_POWER_AC; i++) {
1791                         cmd = &pow_data->pwr_range_0[i].cmd;
1792
1793                         if (pci_pm & 0x1)
1794                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1795                         else
1796                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1797                 }
1798         }
1799         return rc;
1800 }
1801
1802 static int iwl3945_update_power_cmd(struct iwl_priv *priv,
1803                                 struct iwl_powertable_cmd *cmd, u32 mode)
1804 {
1805         int rc = 0, i;
1806         u8 skip;
1807         u32 max_sleep = 0;
1808         struct iwl_power_vec_entry *range;
1809         u8 period = 0;
1810         struct iwl3945_power_mgr *pow_data;
1811
1812         if (mode > IWL_POWER_INDEX_5) {
1813                 IWL_DEBUG_POWER("Error invalid power mode \n");
1814                 return -1;
1815         }
1816         pow_data = &(priv->power_data_39);
1817
1818         if (pow_data->active_index == IWL_POWER_RANGE_0)
1819                 range = &pow_data->pwr_range_0[0];
1820         else
1821                 range = &pow_data->pwr_range_1[1];
1822
1823         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
1824
1825 #ifdef IWL_MAC80211_DISABLE
1826         if (priv->assoc_network != NULL) {
1827                 unsigned long flags;
1828
1829                 period = priv->assoc_network->tim.tim_period;
1830         }
1831 #endif  /*IWL_MAC80211_DISABLE */
1832         skip = range[mode].no_dtim;
1833
1834         if (period == 0) {
1835                 period = 1;
1836                 skip = 0;
1837         }
1838
1839         if (skip == 0) {
1840                 max_sleep = period;
1841                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1842         } else {
1843                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1844                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1845                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1846         }
1847
1848         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1849                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1850                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1851         }
1852
1853         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1854         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1855         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1856         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1857                         le32_to_cpu(cmd->sleep_interval[0]),
1858                         le32_to_cpu(cmd->sleep_interval[1]),
1859                         le32_to_cpu(cmd->sleep_interval[2]),
1860                         le32_to_cpu(cmd->sleep_interval[3]),
1861                         le32_to_cpu(cmd->sleep_interval[4]));
1862
1863         return rc;
1864 }
1865
1866 static int iwl3945_send_power_mode(struct iwl_priv *priv, u32 mode)
1867 {
1868         u32 uninitialized_var(final_mode);
1869         int rc;
1870         struct iwl_powertable_cmd cmd;
1871
1872         /* If on battery, set to 3,
1873          * if plugged into AC power, set to CAM ("continuously aware mode"),
1874          * else user level */
1875         switch (mode) {
1876         case IWL39_POWER_BATTERY:
1877                 final_mode = IWL_POWER_INDEX_3;
1878                 break;
1879         case IWL39_POWER_AC:
1880                 final_mode = IWL_POWER_MODE_CAM;
1881                 break;
1882         default:
1883                 final_mode = mode;
1884                 break;
1885         }
1886
1887         iwl3945_update_power_cmd(priv, &cmd, final_mode);
1888
1889         /* FIXME use get_hcmd_size 3945 command is 4 bytes shorter */
1890         rc = iwl3945_send_cmd_pdu(priv, POWER_TABLE_CMD,
1891                                 sizeof(struct iwl3945_powertable_cmd), &cmd);
1892
1893         if (final_mode == IWL_POWER_MODE_CAM)
1894                 clear_bit(STATUS_POWER_PMI, &priv->status);
1895         else
1896                 set_bit(STATUS_POWER_PMI, &priv->status);
1897
1898         return rc;
1899 }
1900
1901 /**
1902  * iwl3945_scan_cancel - Cancel any currently executing HW scan
1903  *
1904  * NOTE: priv->mutex is not required before calling this function
1905  */
1906 static int iwl3945_scan_cancel(struct iwl_priv *priv)
1907 {
1908         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1909                 clear_bit(STATUS_SCANNING, &priv->status);
1910                 return 0;
1911         }
1912
1913         if (test_bit(STATUS_SCANNING, &priv->status)) {
1914                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1915                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1916                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1917                         queue_work(priv->workqueue, &priv->abort_scan);
1918
1919                 } else
1920                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1921
1922                 return test_bit(STATUS_SCANNING, &priv->status);
1923         }
1924
1925         return 0;
1926 }
1927
1928 /**
1929  * iwl3945_scan_cancel_timeout - Cancel any currently executing HW scan
1930  * @ms: amount of time to wait (in milliseconds) for scan to abort
1931  *
1932  * NOTE: priv->mutex must be held before calling this function
1933  */
1934 static int iwl3945_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1935 {
1936         unsigned long now = jiffies;
1937         int ret;
1938
1939         ret = iwl3945_scan_cancel(priv);
1940         if (ret && ms) {
1941                 mutex_unlock(&priv->mutex);
1942                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1943                                 test_bit(STATUS_SCANNING, &priv->status))
1944                         msleep(1);
1945                 mutex_lock(&priv->mutex);
1946
1947                 return test_bit(STATUS_SCANNING, &priv->status);
1948         }
1949
1950         return ret;
1951 }
1952
1953 #define MAX_UCODE_BEACON_INTERVAL       1024
1954 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1955
1956 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
1957 {
1958         u16 new_val = 0;
1959         u16 beacon_factor = 0;
1960
1961         beacon_factor =
1962             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1963                 / MAX_UCODE_BEACON_INTERVAL;
1964         new_val = beacon_val / beacon_factor;
1965
1966         return cpu_to_le16(new_val);
1967 }
1968
1969 static void iwl3945_setup_rxon_timing(struct iwl_priv *priv)
1970 {
1971         u64 interval_tm_unit;
1972         u64 tsf, result;
1973         unsigned long flags;
1974         struct ieee80211_conf *conf = NULL;
1975         u16 beacon_int = 0;
1976
1977         conf = ieee80211_get_hw_conf(priv->hw);
1978
1979         spin_lock_irqsave(&priv->lock, flags);
1980         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
1981         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1982
1983         tsf = priv->timestamp;
1984
1985         beacon_int = priv->beacon_int;
1986         spin_unlock_irqrestore(&priv->lock, flags);
1987
1988         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
1989                 if (beacon_int == 0) {
1990                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1991                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1992                 } else {
1993                         priv->rxon_timing.beacon_interval =
1994                                 cpu_to_le16(beacon_int);
1995                         priv->rxon_timing.beacon_interval =
1996                             iwl3945_adjust_beacon_interval(
1997                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1998                 }
1999
2000                 priv->rxon_timing.atim_window = 0;
2001         } else {
2002                 priv->rxon_timing.beacon_interval =
2003                         iwl3945_adjust_beacon_interval(conf->beacon_int);
2004                 /* TODO: we need to get atim_window from upper stack
2005                  * for now we set to 0 */
2006                 priv->rxon_timing.atim_window = 0;
2007         }
2008
2009         interval_tm_unit =
2010                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2011         result = do_div(tsf, interval_tm_unit);
2012         priv->rxon_timing.beacon_init_val =
2013             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2014
2015         IWL_DEBUG_ASSOC
2016             ("beacon interval %d beacon timer %d beacon tim %d\n",
2017                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2018                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2019                 le16_to_cpu(priv->rxon_timing.atim_window));
2020 }
2021
2022 static int iwl3945_scan_initiate(struct iwl_priv *priv)
2023 {
2024         if (!iwl3945_is_ready_rf(priv)) {
2025                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2026                 return -EIO;
2027         }
2028
2029         if (test_bit(STATUS_SCANNING, &priv->status)) {
2030                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2031                 return -EAGAIN;
2032         }
2033
2034         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2035                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2036                                "Queuing.\n");
2037                 return -EAGAIN;
2038         }
2039
2040         IWL_DEBUG_INFO("Starting scan...\n");
2041         if (priv->cfg->sku & IWL_SKU_G)
2042                 priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
2043         if (priv->cfg->sku & IWL_SKU_A)
2044                 priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
2045         set_bit(STATUS_SCANNING, &priv->status);
2046         priv->scan_start = jiffies;
2047         priv->scan_pass_start = priv->scan_start;
2048
2049         queue_work(priv->workqueue, &priv->request_scan);
2050
2051         return 0;
2052 }
2053
2054 static int iwl3945_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2055 {
2056         struct iwl3945_rxon_cmd *rxon = &priv->staging39_rxon;
2057
2058         if (hw_decrypt)
2059                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2060         else
2061                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2062
2063         return 0;
2064 }
2065
2066 static void iwl3945_set_flags_for_phymode(struct iwl_priv *priv,
2067                                           enum ieee80211_band band)
2068 {
2069         if (band == IEEE80211_BAND_5GHZ) {
2070                 priv->staging39_rxon.flags &=
2071                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2072                       | RXON_FLG_CCK_MSK);
2073                 priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2074         } else {
2075                 /* Copied from iwl3945_bg_post_associate() */
2076                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2077                         priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2078                 else
2079                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2080
2081                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2082                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2083
2084                 priv->staging39_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2085                 priv->staging39_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2086                 priv->staging39_rxon.flags &= ~RXON_FLG_CCK_MSK;
2087         }
2088 }
2089
2090 /*
2091  * initialize rxon structure with default values from eeprom
2092  */
2093 static void iwl3945_connection_init_rx_config(struct iwl_priv *priv,
2094                                               int mode)
2095 {
2096         const struct iwl_channel_info *ch_info;
2097
2098         memset(&priv->staging39_rxon, 0, sizeof(priv->staging39_rxon));
2099
2100         switch (mode) {
2101         case NL80211_IFTYPE_AP:
2102                 priv->staging39_rxon.dev_type = RXON_DEV_TYPE_AP;
2103                 break;
2104
2105         case NL80211_IFTYPE_STATION:
2106                 priv->staging39_rxon.dev_type = RXON_DEV_TYPE_ESS;
2107                 priv->staging39_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2108                 break;
2109
2110         case NL80211_IFTYPE_ADHOC:
2111                 priv->staging39_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2112                 priv->staging39_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2113                 priv->staging39_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2114                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2115                 break;
2116
2117         case NL80211_IFTYPE_MONITOR:
2118                 priv->staging39_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2119                 priv->staging39_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2120                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2121                 break;
2122         default:
2123                 IWL_ERROR("Unsupported interface type %d\n", mode);
2124                 break;
2125         }
2126
2127 #if 0
2128         /* TODO:  Figure out when short_preamble would be set and cache from
2129          * that */
2130         if (!hw_to_local(priv->hw)->short_preamble)
2131                 priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2132         else
2133                 priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2134 #endif
2135
2136         ch_info = iwl3945_get_channel_info(priv, priv->band,
2137                                        le16_to_cpu(priv->active39_rxon.channel));
2138
2139         if (!ch_info)
2140                 ch_info = &priv->channel_info[0];
2141
2142         /*
2143          * in some case A channels are all non IBSS
2144          * in this case force B/G channel
2145          */
2146         if ((mode == NL80211_IFTYPE_ADHOC) && !(is_channel_ibss(ch_info)))
2147                 ch_info = &priv->channel_info[0];
2148
2149         priv->staging39_rxon.channel = cpu_to_le16(ch_info->channel);
2150         if (is_channel_a_band(ch_info))
2151                 priv->band = IEEE80211_BAND_5GHZ;
2152         else
2153                 priv->band = IEEE80211_BAND_2GHZ;
2154
2155         iwl3945_set_flags_for_phymode(priv, priv->band);
2156
2157         priv->staging39_rxon.ofdm_basic_rates =
2158             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2159         priv->staging39_rxon.cck_basic_rates =
2160             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2161 }
2162
2163 static int iwl3945_set_mode(struct iwl_priv *priv, int mode)
2164 {
2165         if (mode == NL80211_IFTYPE_ADHOC) {
2166                 const struct iwl_channel_info *ch_info;
2167
2168                 ch_info = iwl3945_get_channel_info(priv,
2169                         priv->band,
2170                         le16_to_cpu(priv->staging39_rxon.channel));
2171
2172                 if (!ch_info || !is_channel_ibss(ch_info)) {
2173                         IWL_ERROR("channel %d not IBSS channel\n",
2174                                   le16_to_cpu(priv->staging39_rxon.channel));
2175                         return -EINVAL;
2176                 }
2177         }
2178
2179         iwl3945_connection_init_rx_config(priv, mode);
2180         memcpy(priv->staging39_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2181
2182         iwl3945_clear_stations_table(priv);
2183
2184         /* don't commit rxon if rf-kill is on*/
2185         if (!iwl3945_is_ready_rf(priv))
2186                 return -EAGAIN;
2187
2188         cancel_delayed_work(&priv->scan_check);
2189         if (iwl3945_scan_cancel_timeout(priv, 100)) {
2190                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2191                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2192                 return -EAGAIN;
2193         }
2194
2195         iwl3945_commit_rxon(priv);
2196
2197         return 0;
2198 }
2199
2200 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2201                                       struct ieee80211_tx_info *info,
2202                                       struct iwl3945_cmd *cmd,
2203                                       struct sk_buff *skb_frag,
2204                                       int last_frag)
2205 {
2206         struct iwl3945_hw_key *keyinfo =
2207             &priv->stations_39[info->control.hw_key->hw_key_idx].keyinfo;
2208
2209         switch (keyinfo->alg) {
2210         case ALG_CCMP:
2211                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2212                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2213                 IWL_DEBUG_TX("tx_cmd with AES hwcrypto\n");
2214                 break;
2215
2216         case ALG_TKIP:
2217 #if 0
2218                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2219
2220                 if (last_frag)
2221                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2222                                8);
2223                 else
2224                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2225 #endif
2226                 break;
2227
2228         case ALG_WEP:
2229                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2230                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2231
2232                 if (keyinfo->keylen == 13)
2233                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2234
2235                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2236
2237                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2238                              "with key %d\n", info->control.hw_key->hw_key_idx);
2239                 break;
2240
2241         default:
2242                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
2243                 break;
2244         }
2245 }
2246
2247 /*
2248  * handle build REPLY_TX command notification.
2249  */
2250 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
2251                                   struct iwl3945_cmd *cmd,
2252                                   struct ieee80211_tx_info *info,
2253                                   struct ieee80211_hdr *hdr,
2254                                   int is_unicast, u8 std_id)
2255 {
2256         __le16 fc = hdr->frame_control;
2257         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2258         u8 rc_flags = info->control.rates[0].flags;
2259
2260         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2261         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
2262                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2263                 if (ieee80211_is_mgmt(fc))
2264                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2265                 if (ieee80211_is_probe_resp(fc) &&
2266                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2267                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2268         } else {
2269                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2270                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2271         }
2272
2273         cmd->cmd.tx.sta_id = std_id;
2274         if (ieee80211_has_morefrags(fc))
2275                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2276
2277         if (ieee80211_is_data_qos(fc)) {
2278                 u8 *qc = ieee80211_get_qos_ctl(hdr);
2279                 cmd->cmd.tx.tid_tspec = qc[0] & 0xf;
2280                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2281         } else {
2282                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2283         }
2284
2285         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2286                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2287                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2288         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
2289                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2290                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2291         }
2292
2293         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2294                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2295
2296         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2297         if (ieee80211_is_mgmt(fc)) {
2298                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
2299                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2300                 else
2301                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2302         } else {
2303                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2304 #ifdef CONFIG_IWL3945_LEDS
2305                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
2306 #endif
2307         }
2308
2309         cmd->cmd.tx.driver_txop = 0;
2310         cmd->cmd.tx.tx_flags = tx_flags;
2311         cmd->cmd.tx.next_frame_len = 0;
2312 }
2313
2314 /**
2315  * iwl3945_get_sta_id - Find station's index within station table
2316  */
2317 static int iwl3945_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2318 {
2319         int sta_id;
2320         u16 fc = le16_to_cpu(hdr->frame_control);
2321
2322         /* If this frame is broadcast or management, use broadcast station id */
2323         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2324             is_multicast_ether_addr(hdr->addr1))
2325                 return priv->hw_params.bcast_sta_id;
2326
2327         switch (priv->iw_mode) {
2328
2329         /* If we are a client station in a BSS network, use the special
2330          * AP station entry (that's the only station we communicate with) */
2331         case NL80211_IFTYPE_STATION:
2332                 return IWL_AP_ID;
2333
2334         /* If we are an AP, then find the station, or use BCAST */
2335         case NL80211_IFTYPE_AP:
2336                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2337                 if (sta_id != IWL_INVALID_STATION)
2338                         return sta_id;
2339                 return priv->hw_params.bcast_sta_id;
2340
2341         /* If this frame is going out to an IBSS network, find the station,
2342          * or create a new station table entry */
2343         case NL80211_IFTYPE_ADHOC: {
2344                 /* Create new station table entry */
2345                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
2346                 if (sta_id != IWL_INVALID_STATION)
2347                         return sta_id;
2348
2349                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2350
2351                 if (sta_id != IWL_INVALID_STATION)
2352                         return sta_id;
2353
2354                 IWL_DEBUG_DROP("Station %pM not in station map. "
2355                                "Defaulting to broadcast...\n",
2356                                hdr->addr1);
2357                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2358                 return priv->hw_params.bcast_sta_id;
2359         }
2360         /* If we are in monitor mode, use BCAST. This is required for
2361          * packet injection. */
2362         case NL80211_IFTYPE_MONITOR:
2363                 return priv->hw_params.bcast_sta_id;
2364
2365         default:
2366                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
2367                         priv->iw_mode);
2368                 return priv->hw_params.bcast_sta_id;
2369         }
2370 }
2371
2372 /*
2373  * start REPLY_TX command process
2374  */
2375 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
2376 {
2377         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2378         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2379         struct iwl3945_tfd_frame *tfd;
2380         u32 *control_flags;
2381         int txq_id = skb_get_queue_mapping(skb);
2382         struct iwl3945_tx_queue *txq = NULL;
2383         struct iwl_queue *q = NULL;
2384         dma_addr_t phys_addr;
2385         dma_addr_t txcmd_phys;
2386         struct iwl3945_cmd *out_cmd = NULL;
2387         u16 len, idx, len_org, hdr_len;
2388         u8 id;
2389         u8 unicast;
2390         u8 sta_id;
2391         u8 tid = 0;
2392         u16 seq_number = 0;
2393         __le16 fc;
2394         u8 wait_write_ptr = 0;
2395         u8 *qc = NULL;
2396         unsigned long flags;
2397         int rc;
2398
2399         spin_lock_irqsave(&priv->lock, flags);
2400         if (iwl3945_is_rfkill(priv)) {
2401                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2402                 goto drop_unlock;
2403         }
2404
2405         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
2406                 IWL_ERROR("ERROR: No TX rate available.\n");
2407                 goto drop_unlock;
2408         }
2409
2410         unicast = !is_multicast_ether_addr(hdr->addr1);
2411         id = 0;
2412
2413         fc = hdr->frame_control;
2414
2415 #ifdef CONFIG_IWL3945_DEBUG
2416         if (ieee80211_is_auth(fc))
2417                 IWL_DEBUG_TX("Sending AUTH frame\n");
2418         else if (ieee80211_is_assoc_req(fc))
2419                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2420         else if (ieee80211_is_reassoc_req(fc))
2421                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2422 #endif
2423
2424         /* drop all data frame if we are not associated */
2425         if (ieee80211_is_data(fc) &&
2426             (priv->iw_mode != NL80211_IFTYPE_MONITOR) && /* packet injection */
2427             (!iwl3945_is_associated(priv) ||
2428              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
2429                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
2430                 goto drop_unlock;
2431         }
2432
2433         spin_unlock_irqrestore(&priv->lock, flags);
2434
2435         hdr_len = ieee80211_hdrlen(fc);
2436
2437         /* Find (or create) index into station table for destination station */
2438         sta_id = iwl3945_get_sta_id(priv, hdr);
2439         if (sta_id == IWL_INVALID_STATION) {
2440                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %pM\n",
2441                                hdr->addr1);
2442                 goto drop;
2443         }
2444
2445         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2446
2447         if (ieee80211_is_data_qos(fc)) {
2448                 qc = ieee80211_get_qos_ctl(hdr);
2449                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
2450                 seq_number = priv->stations_39[sta_id].tid[tid].seq_number &
2451                                 IEEE80211_SCTL_SEQ;
2452                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2453                         (hdr->seq_ctrl &
2454                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2455                 seq_number += 0x10;
2456         }
2457
2458         /* Descriptor for chosen Tx queue */
2459         txq = &priv->txq39[txq_id];
2460         q = &txq->q;
2461
2462         spin_lock_irqsave(&priv->lock, flags);
2463
2464         /* Set up first empty TFD within this queue's circular TFD buffer */
2465         tfd = &txq->bd[q->write_ptr];
2466         memset(tfd, 0, sizeof(*tfd));
2467         control_flags = (u32 *) tfd;
2468         idx = get_cmd_index(q, q->write_ptr, 0);
2469
2470         /* Set up driver data for this TFD */
2471         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
2472         txq->txb[q->write_ptr].skb[0] = skb;
2473
2474         /* Init first empty entry in queue's array of Tx/cmd buffers */
2475         out_cmd = &txq->cmd[idx];
2476         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2477         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2478
2479         /*
2480          * Set up the Tx-command (not MAC!) header.
2481          * Store the chosen Tx queue and TFD index within the sequence field;
2482          * after Tx, uCode's Tx response will return this value so driver can
2483          * locate the frame within the tx queue and do post-tx processing.
2484          */
2485         out_cmd->hdr.cmd = REPLY_TX;
2486         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2487                                 INDEX_TO_SEQ(q->write_ptr)));
2488
2489         /* Copy MAC header from skb into command buffer */
2490         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2491
2492         /*
2493          * Use the first empty entry in this queue's command buffer array
2494          * to contain the Tx command and MAC header concatenated together
2495          * (payload data will be in another buffer).
2496          * Size of this varies, due to varying MAC header length.
2497          * If end is not dword aligned, we'll have 2 extra bytes at the end
2498          * of the MAC header (device reads on dword boundaries).
2499          * We'll tell device about this padding later.
2500          */
2501         len = sizeof(struct iwl3945_tx_cmd) +
2502                         sizeof(struct iwl_cmd_header) + hdr_len;
2503
2504         len_org = len;
2505         len = (len + 3) & ~3;
2506
2507         if (len_org != len)
2508                 len_org = 1;
2509         else
2510                 len_org = 0;
2511
2512         /* Physical address of this Tx command's header (not MAC header!),
2513          * within command buffer array. */
2514         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl3945_cmd) * idx +
2515                      offsetof(struct iwl3945_cmd, hdr);
2516
2517         /* Add buffer containing Tx command and MAC(!) header to TFD's
2518          * first entry */
2519         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2520
2521         if (info->control.hw_key)
2522                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
2523
2524         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2525          * if any (802.11 null frames have no payload). */
2526         len = skb->len - hdr_len;
2527         if (len) {
2528                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2529                                            len, PCI_DMA_TODEVICE);
2530                 iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2531         }
2532
2533         if (!len)
2534                 /* If there is no payload, then we use only one Tx buffer */
2535                 *control_flags = TFD_CTL_COUNT_SET(1);
2536         else
2537                 /* Else use 2 buffers.
2538                  * Tell 3945 about any padding after MAC header */
2539                 *control_flags = TFD_CTL_COUNT_SET(2) |
2540                         TFD_CTL_PAD_SET(U32_PAD(len));
2541
2542         /* Total # bytes to be transmitted */
2543         len = (u16)skb->len;
2544         out_cmd->cmd.tx.len = cpu_to_le16(len);
2545
2546         /* TODO need this for burst mode later on */
2547         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, unicast, sta_id);
2548
2549         /* set is_hcca to 0; it probably will never be implemented */
2550         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
2551
2552         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2553         out_cmd->cmd.tx.tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2554
2555         if (!ieee80211_has_morefrags(hdr->frame_control)) {
2556                 txq->need_update = 1;
2557                 if (qc)
2558                         priv->stations_39[sta_id].tid[tid].seq_number = seq_number;
2559         } else {
2560                 wait_write_ptr = 1;
2561                 txq->need_update = 0;
2562         }
2563
2564         iwl_print_hex_dump(priv, IWL_DL_TX, out_cmd->cmd.payload,
2565                            sizeof(out_cmd->cmd.tx));
2566
2567         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2568                            ieee80211_hdrlen(fc));
2569
2570         /* Tell device the write index *just past* this latest filled TFD */
2571         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2572         rc = iwl3945_tx_queue_update_write_ptr(priv, txq);
2573         spin_unlock_irqrestore(&priv->lock, flags);
2574
2575         if (rc)
2576                 return rc;
2577
2578         if ((iwl_queue_space(q) < q->high_mark)
2579             && priv->mac80211_registered) {
2580                 if (wait_write_ptr) {
2581                         spin_lock_irqsave(&priv->lock, flags);
2582                         txq->need_update = 1;
2583                         iwl3945_tx_queue_update_write_ptr(priv, txq);
2584                         spin_unlock_irqrestore(&priv->lock, flags);
2585                 }
2586
2587                 ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
2588         }
2589
2590         return 0;
2591
2592 drop_unlock:
2593         spin_unlock_irqrestore(&priv->lock, flags);
2594 drop:
2595         return -1;
2596 }
2597
2598 static void iwl3945_set_rate(struct iwl_priv *priv)
2599 {
2600         const struct ieee80211_supported_band *sband = NULL;
2601         struct ieee80211_rate *rate;
2602         int i;
2603
2604         sband = iwl3945_get_band(priv, priv->band);
2605         if (!sband) {
2606                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2607                 return;
2608         }
2609
2610         priv->active_rate = 0;
2611         priv->active_rate_basic = 0;
2612
2613         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2614                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2615
2616         for (i = 0; i < sband->n_bitrates; i++) {
2617                 rate = &sband->bitrates[i];
2618                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2619                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2620                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2621                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2622                         priv->active_rate |= (1 << rate->hw_value);
2623                 }
2624         }
2625
2626         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2627                        priv->active_rate, priv->active_rate_basic);
2628
2629         /*
2630          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2631          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2632          * OFDM
2633          */
2634         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2635                 priv->staging39_rxon.cck_basic_rates =
2636                     ((priv->active_rate_basic &
2637                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2638         else
2639                 priv->staging39_rxon.cck_basic_rates =
2640                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2641
2642         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2643                 priv->staging39_rxon.ofdm_basic_rates =
2644                     ((priv->active_rate_basic &
2645                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2646                       IWL_FIRST_OFDM_RATE) & 0xFF;
2647         else
2648                 priv->staging39_rxon.ofdm_basic_rates =
2649                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2650 }
2651
2652 static void iwl3945_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2653 {
2654         unsigned long flags;
2655
2656         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2657                 return;
2658
2659         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2660                           disable_radio ? "OFF" : "ON");
2661
2662         if (disable_radio) {
2663                 iwl3945_scan_cancel(priv);
2664                 /* FIXME: This is a workaround for AP */
2665                 if (priv->iw_mode != NL80211_IFTYPE_AP) {
2666                         spin_lock_irqsave(&priv->lock, flags);
2667                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2668                                     CSR_UCODE_SW_BIT_RFKILL);
2669                         spin_unlock_irqrestore(&priv->lock, flags);
2670                         iwl3945_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2671                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2672                 }
2673                 return;
2674         }
2675
2676         spin_lock_irqsave(&priv->lock, flags);
2677         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2678
2679         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2680         spin_unlock_irqrestore(&priv->lock, flags);
2681
2682         /* wake up ucode */
2683         msleep(10);
2684
2685         spin_lock_irqsave(&priv->lock, flags);
2686         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2687         if (!iwl_grab_nic_access(priv))
2688                 iwl_release_nic_access(priv);
2689         spin_unlock_irqrestore(&priv->lock, flags);
2690
2691         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2692                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2693                                   "disabled by HW switch\n");
2694                 return;
2695         }
2696
2697         if (priv->is_open)
2698                 queue_work(priv->workqueue, &priv->restart);
2699         return;
2700 }
2701
2702 void iwl3945_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
2703                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2704 {
2705         u16 fc =
2706             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2707
2708         if (priv->active39_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2709                 return;
2710
2711         if (!(fc & IEEE80211_FCTL_PROTECTED))
2712                 return;
2713
2714         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2715         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2716         case RX_RES_STATUS_SEC_TYPE_TKIP:
2717                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2718                     RX_RES_STATUS_BAD_ICV_MIC)
2719                         stats->flag |= RX_FLAG_MMIC_ERROR;
2720         case RX_RES_STATUS_SEC_TYPE_WEP:
2721         case RX_RES_STATUS_SEC_TYPE_CCMP:
2722                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2723                     RX_RES_STATUS_DECRYPT_OK) {
2724                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2725                         stats->flag |= RX_FLAG_DECRYPTED;
2726                 }
2727                 break;
2728
2729         default:
2730                 break;
2731         }
2732 }
2733
2734 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2735
2736 #include "iwl-spectrum.h"
2737
2738 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2739 #define BEACON_TIME_MASK_HIGH   0xFF000000
2740 #define TIME_UNIT               1024
2741
2742 /*
2743  * extended beacon time format
2744  * time in usec will be changed into a 32-bit value in 8:24 format
2745  * the high 1 byte is the beacon counts
2746  * the lower 3 bytes is the time in usec within one beacon interval
2747  */
2748
2749 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
2750 {
2751         u32 quot;
2752         u32 rem;
2753         u32 interval = beacon_interval * 1024;
2754
2755         if (!interval || !usec)
2756                 return 0;
2757
2758         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2759         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2760
2761         return (quot << 24) + rem;
2762 }
2763
2764 /* base is usually what we get from ucode with each received frame,
2765  * the same as HW timer counter counting down
2766  */
2767
2768 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2769 {
2770         u32 base_low = base & BEACON_TIME_MASK_LOW;
2771         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2772         u32 interval = beacon_interval * TIME_UNIT;
2773         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2774             (addon & BEACON_TIME_MASK_HIGH);
2775
2776         if (base_low > addon_low)
2777                 res += base_low - addon_low;
2778         else if (base_low < addon_low) {
2779                 res += interval + base_low - addon_low;
2780                 res += (1 << 24);
2781         } else
2782                 res += (1 << 24);
2783
2784         return cpu_to_le32(res);
2785 }
2786
2787 static int iwl3945_get_measurement(struct iwl_priv *priv,
2788                                struct ieee80211_measurement_params *params,
2789                                u8 type)
2790 {
2791         struct iwl_spectrum_cmd spectrum;
2792         struct iwl_rx_packet *res;
2793         struct iwl3945_host_cmd cmd = {
2794                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2795                 .data = (void *)&spectrum,
2796                 .meta.flags = CMD_WANT_SKB,
2797         };
2798         u32 add_time = le64_to_cpu(params->start_time);
2799         int rc;
2800         int spectrum_resp_status;
2801         int duration = le16_to_cpu(params->duration);
2802
2803         if (iwl3945_is_associated(priv))
2804                 add_time =
2805                     iwl3945_usecs_to_beacons(
2806                         le64_to_cpu(params->start_time) - priv->last_tsf,
2807                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2808
2809         memset(&spectrum, 0, sizeof(spectrum));
2810
2811         spectrum.channel_count = cpu_to_le16(1);
2812         spectrum.flags =
2813             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2814         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2815         cmd.len = sizeof(spectrum);
2816         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2817
2818         if (iwl3945_is_associated(priv))
2819                 spectrum.start_time =
2820                     iwl3945_add_beacon_time(priv->last_beacon_time,
2821                                 add_time,
2822                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2823         else
2824                 spectrum.start_time = 0;
2825
2826         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2827         spectrum.channels[0].channel = params->channel;
2828         spectrum.channels[0].type = type;
2829         if (priv->active39_rxon.flags & RXON_FLG_BAND_24G_MSK)
2830                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2831                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2832
2833         rc = iwl3945_send_cmd_sync(priv, &cmd);
2834         if (rc)
2835                 return rc;
2836
2837         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
2838         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2839                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2840                 rc = -EIO;
2841         }
2842
2843         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2844         switch (spectrum_resp_status) {
2845         case 0:         /* Command will be handled */
2846                 if (res->u.spectrum.id != 0xff) {
2847                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
2848                                                 res->u.spectrum.id);
2849                         priv->measurement_status &= ~MEASUREMENT_READY;
2850                 }
2851                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2852                 rc = 0;
2853                 break;
2854
2855         case 1:         /* Command will not be handled */
2856                 rc = -EAGAIN;
2857                 break;
2858         }
2859
2860         dev_kfree_skb_any(cmd.meta.u.skb);
2861
2862         return rc;
2863 }
2864 #endif
2865
2866 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
2867                                struct iwl_rx_mem_buffer *rxb)
2868 {
2869         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2870         struct iwl_alive_resp *palive;
2871         struct delayed_work *pwork;
2872
2873         palive = &pkt->u.alive_frame;
2874
2875         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2876                        "0x%01X 0x%01X\n",
2877                        palive->is_valid, palive->ver_type,
2878                        palive->ver_subtype);
2879
2880         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2881                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2882                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
2883                        sizeof(struct iwl_alive_resp));
2884                 pwork = &priv->init_alive_start;
2885         } else {
2886                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2887                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2888                        sizeof(struct iwl_alive_resp));
2889                 pwork = &priv->alive_start;
2890                 iwl3945_disable_events(priv);
2891         }
2892
2893         /* We delay the ALIVE response by 5ms to
2894          * give the HW RF Kill time to activate... */
2895         if (palive->is_valid == UCODE_VALID_OK)
2896                 queue_delayed_work(priv->workqueue, pwork,
2897                                    msecs_to_jiffies(5));
2898         else
2899                 IWL_WARN(priv, "uCode did not respond OK.\n");
2900 }
2901
2902 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
2903                                  struct iwl_rx_mem_buffer *rxb)
2904 {
2905         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2906
2907         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2908         return;
2909 }
2910
2911 static void iwl3945_rx_reply_error(struct iwl_priv *priv,
2912                                struct iwl_rx_mem_buffer *rxb)
2913 {
2914         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2915
2916         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
2917                 "seq 0x%04X ser 0x%08X\n",
2918                 le32_to_cpu(pkt->u.err_resp.error_type),
2919                 get_cmd_string(pkt->u.err_resp.cmd_id),
2920                 pkt->u.err_resp.cmd_id,
2921                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2922                 le32_to_cpu(pkt->u.err_resp.error_info));
2923 }
2924
2925 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2926
2927 static void iwl3945_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
2928 {
2929         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2930         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active39_rxon;
2931         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
2932         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2933                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2934         rxon->channel = csa->channel;
2935         priv->staging39_rxon.channel = csa->channel;
2936 }
2937
2938 static void iwl3945_rx_spectrum_measure_notif(struct iwl_priv *priv,
2939                                           struct iwl_rx_mem_buffer *rxb)
2940 {
2941 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2942         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2943         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
2944
2945         if (!report->state) {
2946                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2947                           "Spectrum Measure Notification: Start\n");
2948                 return;
2949         }
2950
2951         memcpy(&priv->measure_report, report, sizeof(*report));
2952         priv->measurement_status |= MEASUREMENT_READY;
2953 #endif
2954 }
2955
2956 static void iwl3945_rx_pm_sleep_notif(struct iwl_priv *priv,
2957                                   struct iwl_rx_mem_buffer *rxb)
2958 {
2959 #ifdef CONFIG_IWL3945_DEBUG
2960         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2961         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2962         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2963                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2964 #endif
2965 }
2966
2967 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2968                                              struct iwl_rx_mem_buffer *rxb)
2969 {
2970         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2971         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2972                         "notification for %s:\n",
2973                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2974         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw,
2975                            le32_to_cpu(pkt->len));
2976 }
2977
2978 static void iwl3945_bg_beacon_update(struct work_struct *work)
2979 {
2980         struct iwl_priv *priv =
2981                 container_of(work, struct iwl_priv, beacon_update);
2982         struct sk_buff *beacon;
2983
2984         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2985         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
2986
2987         if (!beacon) {
2988                 IWL_ERROR("update beacon failed\n");
2989                 return;
2990         }
2991
2992         mutex_lock(&priv->mutex);
2993         /* new beacon skb is allocated every time; dispose previous.*/
2994         if (priv->ibss_beacon)
2995                 dev_kfree_skb(priv->ibss_beacon);
2996
2997         priv->ibss_beacon = beacon;
2998         mutex_unlock(&priv->mutex);
2999
3000         iwl3945_send_beacon_cmd(priv);
3001 }
3002
3003 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
3004                                 struct iwl_rx_mem_buffer *rxb)
3005 {
3006 #ifdef CONFIG_IWL3945_DEBUG
3007         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3008         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
3009         u8 rate = beacon->beacon_notify_hdr.rate;
3010
3011         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3012                 "tsf %d %d rate %d\n",
3013                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3014                 beacon->beacon_notify_hdr.failure_frame,
3015                 le32_to_cpu(beacon->ibss_mgr_status),
3016                 le32_to_cpu(beacon->high_tsf),
3017                 le32_to_cpu(beacon->low_tsf), rate);
3018 #endif
3019
3020         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
3021             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3022                 queue_work(priv->workqueue, &priv->beacon_update);
3023 }
3024
3025 /* Service response to REPLY_SCAN_CMD (0x80) */
3026 static void iwl3945_rx_reply_scan(struct iwl_priv *priv,
3027                               struct iwl_rx_mem_buffer *rxb)
3028 {
3029 #ifdef CONFIG_IWL3945_DEBUG
3030         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3031         struct iwl_scanreq_notification *notif =
3032             (struct iwl_scanreq_notification *)pkt->u.raw;
3033
3034         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3035 #endif
3036 }
3037
3038 /* Service SCAN_START_NOTIFICATION (0x82) */
3039 static void iwl3945_rx_scan_start_notif(struct iwl_priv *priv,
3040                                     struct iwl_rx_mem_buffer *rxb)
3041 {
3042         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3043         struct iwl_scanstart_notification *notif =
3044             (struct iwl_scanstart_notification *)pkt->u.raw;
3045         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3046         IWL_DEBUG_SCAN("Scan start: "
3047                        "%d [802.11%s] "
3048                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3049                        notif->channel,
3050                        notif->band ? "bg" : "a",
3051                        notif->tsf_high,
3052                        notif->tsf_low, notif->status, notif->beacon_timer);
3053 }
3054
3055 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3056 static void iwl3945_rx_scan_results_notif(struct iwl_priv *priv,
3057                                       struct iwl_rx_mem_buffer *rxb)
3058 {
3059         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3060         struct iwl_scanresults_notification *notif =
3061             (struct iwl_scanresults_notification *)pkt->u.raw;
3062
3063         IWL_DEBUG_SCAN("Scan ch.res: "
3064                        "%d [802.11%s] "
3065                        "(TSF: 0x%08X:%08X) - %d "
3066                        "elapsed=%lu usec (%dms since last)\n",
3067                        notif->channel,
3068                        notif->band ? "bg" : "a",
3069                        le32_to_cpu(notif->tsf_high),
3070                        le32_to_cpu(notif->tsf_low),
3071                        le32_to_cpu(notif->statistics[0]),
3072                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3073                        jiffies_to_msecs(elapsed_jiffies
3074                                         (priv->last_scan_jiffies, jiffies)));
3075
3076         priv->last_scan_jiffies = jiffies;
3077         priv->next_scan_jiffies = 0;
3078 }
3079
3080 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3081 static void iwl3945_rx_scan_complete_notif(struct iwl_priv *priv,
3082                                        struct iwl_rx_mem_buffer *rxb)
3083 {
3084         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3085         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3086
3087         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3088                        scan_notif->scanned_channels,
3089                        scan_notif->tsf_low,
3090                        scan_notif->tsf_high, scan_notif->status);
3091
3092         /* The HW is no longer scanning */
3093         clear_bit(STATUS_SCAN_HW, &priv->status);
3094
3095         /* The scan completion notification came in, so kill that timer... */
3096         cancel_delayed_work(&priv->scan_check);
3097
3098         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3099                        (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
3100                                                         "2.4" : "5.2",
3101                        jiffies_to_msecs(elapsed_jiffies
3102                                         (priv->scan_pass_start, jiffies)));
3103
3104         /* Remove this scanned band from the list of pending
3105          * bands to scan, band G precedes A in order of scanning
3106          * as seen in iwl3945_bg_request_scan */
3107         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
3108                 priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
3109         else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
3110                 priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
3111
3112         /* If a request to abort was given, or the scan did not succeed
3113          * then we reset the scan state machine and terminate,
3114          * re-queuing another scan if one has been requested */
3115         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3116                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3117                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3118         } else {
3119                 /* If there are more bands on this scan pass reschedule */
3120                 if (priv->scan_bands > 0)
3121                         goto reschedule;
3122         }
3123
3124         priv->last_scan_jiffies = jiffies;
3125         priv->next_scan_jiffies = 0;
3126         IWL_DEBUG_INFO("Setting scan to off\n");
3127
3128         clear_bit(STATUS_SCANNING, &priv->status);
3129
3130         IWL_DEBUG_INFO("Scan took %dms\n",
3131                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3132
3133         queue_work(priv->workqueue, &priv->scan_completed);
3134
3135         return;
3136
3137 reschedule:
3138         priv->scan_pass_start = jiffies;
3139         queue_work(priv->workqueue, &priv->request_scan);
3140 }
3141
3142 /* Handle notification from uCode that card's power state is changing
3143  * due to software, hardware, or critical temperature RFKILL */
3144 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
3145                                     struct iwl_rx_mem_buffer *rxb)
3146 {
3147         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3148         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3149         unsigned long status = priv->status;
3150
3151         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3152                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3153                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3154
3155         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3156                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3157
3158         if (flags & HW_CARD_DISABLED)
3159                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3160         else
3161                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3162
3163
3164         if (flags & SW_CARD_DISABLED)
3165                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3166         else
3167                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3168
3169         iwl3945_scan_cancel(priv);
3170
3171         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3172              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3173             (test_bit(STATUS_RF_KILL_SW, &status) !=
3174              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3175                 queue_work(priv->workqueue, &priv->rf_kill);
3176         else
3177                 wake_up_interruptible(&priv->wait_command_queue);
3178 }
3179
3180 /**
3181  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
3182  *
3183  * Setup the RX handlers for each of the reply types sent from the uCode
3184  * to the host.
3185  *
3186  * This function chains into the hardware specific files for them to setup
3187  * any hardware specific handlers as well.
3188  */
3189 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
3190 {
3191         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
3192         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
3193         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
3194         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
3195         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3196             iwl3945_rx_spectrum_measure_notif;
3197         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
3198         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3199             iwl3945_rx_pm_debug_statistics_notif;
3200         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
3201
3202         /*
3203          * The same handler is used for both the REPLY to a discrete
3204          * statistics request from the host as well as for the periodic
3205          * statistics notifications (after received beacons) from the uCode.
3206          */
3207         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
3208         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
3209
3210         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
3211         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
3212         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3213             iwl3945_rx_scan_results_notif;
3214         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3215             iwl3945_rx_scan_complete_notif;
3216         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
3217
3218         /* Set up hardware specific Rx handlers */
3219         iwl3945_hw_rx_handler_setup(priv);
3220 }
3221
3222 /**
3223  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
3224  * When FW advances 'R' index, all entries between old and new 'R' index
3225  * need to be reclaimed.
3226  */
3227 static void iwl3945_cmd_queue_reclaim(struct iwl_priv *priv,
3228                                       int txq_id, int index)
3229 {
3230         struct iwl3945_tx_queue *txq = &priv->txq39[txq_id];
3231         struct iwl_queue *q = &txq->q;
3232         int nfreed = 0;
3233
3234         if ((index >= q->n_bd) || (iwl3945_x2_queue_used(q, index) == 0)) {
3235                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3236                           "is out of range [0-%d] %d %d.\n", txq_id,
3237                           index, q->n_bd, q->write_ptr, q->read_ptr);
3238                 return;
3239         }
3240
3241         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
3242                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3243                 if (nfreed > 1) {
3244                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3245                                         q->write_ptr, q->read_ptr);
3246                         queue_work(priv->workqueue, &priv->restart);
3247                         break;
3248                 }
3249                 nfreed++;
3250         }
3251 }
3252
3253
3254 /**
3255  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3256  * @rxb: Rx buffer to reclaim
3257  *
3258  * If an Rx buffer has an async callback associated with it the callback
3259  * will be executed.  The attached skb (if present) will only be freed
3260  * if the callback returns 1
3261  */
3262 static void iwl3945_tx_cmd_complete(struct iwl_priv *priv,
3263                                 struct iwl_rx_mem_buffer *rxb)
3264 {
3265         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3266         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3267         int txq_id = SEQ_TO_QUEUE(sequence);
3268         int index = SEQ_TO_INDEX(sequence);
3269         int huge =  !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3270         int cmd_index;
3271         struct iwl3945_cmd *cmd;
3272
3273         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3274
3275         cmd_index = get_cmd_index(&priv->txq39[IWL_CMD_QUEUE_NUM].q, index, huge);
3276         cmd = &priv->txq39[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3277
3278         /* Input error checking is done when commands are added to queue. */
3279         if (cmd->meta.flags & CMD_WANT_SKB) {
3280                 cmd->meta.source->u.skb = rxb->skb;
3281                 rxb->skb = NULL;
3282         } else if (cmd->meta.u.callback &&
3283                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3284                 rxb->skb = NULL;
3285
3286         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
3287
3288         if (!(cmd->meta.flags & CMD_ASYNC)) {
3289                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3290                 wake_up_interruptible(&priv->wait_command_queue);
3291         }
3292 }
3293
3294 /************************** RX-FUNCTIONS ****************************/
3295 /*
3296  * Rx theory of operation
3297  *
3298  * The host allocates 32 DMA target addresses and passes the host address
3299  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
3300  * 0 to 31
3301  *
3302  * Rx Queue Indexes
3303  * The host/firmware share two index registers for managing the Rx buffers.
3304  *
3305  * The READ index maps to the first position that the firmware may be writing
3306  * to -- the driver can read up to (but not including) this position and get
3307  * good data.
3308  * The READ index is managed by the firmware once the card is enabled.
3309  *
3310  * The WRITE index maps to the last position the driver has read from -- the
3311  * position preceding WRITE is the last slot the firmware can place a packet.
3312  *
3313  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3314  * WRITE = READ.
3315  *
3316  * During initialization, the host sets up the READ queue position to the first
3317  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3318  *
3319  * When the firmware places a packet in a buffer, it will advance the READ index
3320  * and fire the RX interrupt.  The driver can then query the READ index and
3321  * process as many packets as possible, moving the WRITE index forward as it
3322  * resets the Rx queue buffers with new memory.
3323  *
3324  * The management in the driver is as follows:
3325  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3326  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3327  *   to replenish the iwl->rxq->rx_free.
3328  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
3329  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3330  *   'processed' and 'read' driver indexes as well)
3331  * + A received packet is processed and handed to the kernel network stack,
3332  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3333  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3334  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3335  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3336  *   were enough free buffers and RX_STALLED is set it is cleared.
3337  *
3338  *
3339  * Driver sequence:
3340  *
3341  * iwl3945_rx_queue_alloc()   Allocates rx_free
3342  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3343  *                            iwl3945_rx_queue_restock
3344  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
3345  *                            queue, updates firmware pointers, and updates
3346  *                            the WRITE index.  If insufficient rx_free buffers
3347  *                            are available, schedules iwl3945_rx_replenish
3348  *
3349  * -- enable interrupts --
3350  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
3351  *                            READ INDEX, detaching the SKB from the pool.
3352  *                            Moves the packet buffer from queue to rx_used.
3353  *                            Calls iwl3945_rx_queue_restock to refill any empty
3354  *                            slots.
3355  * ...
3356  *
3357  */
3358
3359 /**
3360  * iwl3945_rx_queue_space - Return number of free slots available in queue.
3361  */
3362 static int iwl3945_rx_queue_space(const struct iwl_rx_queue *q)
3363 {
3364         int s = q->read - q->write;
3365         if (s <= 0)
3366                 s += RX_QUEUE_SIZE;
3367         /* keep some buffer to not confuse full and empty queue */
3368         s -= 2;
3369         if (s < 0)
3370                 s = 0;
3371         return s;
3372 }
3373
3374 /**
3375  * iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3376  */
3377 int iwl3945_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
3378 {
3379         u32 reg = 0;
3380         int rc = 0;
3381         unsigned long flags;
3382
3383         spin_lock_irqsave(&q->lock, flags);
3384
3385         if (q->need_update == 0)
3386                 goto exit_unlock;
3387
3388         /* If power-saving is in use, make sure device is awake */
3389         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3390                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3391
3392                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3393                         iwl_set_bit(priv, CSR_GP_CNTRL,
3394                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3395                         goto exit_unlock;
3396                 }
3397
3398                 rc = iwl_grab_nic_access(priv);
3399                 if (rc)
3400                         goto exit_unlock;
3401
3402                 /* Device expects a multiple of 8 */
3403                 iwl_write_direct32(priv, FH39_RSCSR_CHNL0_WPTR,
3404                                      q->write & ~0x7);
3405                 iwl_release_nic_access(priv);
3406
3407         /* Else device is assumed to be awake */
3408         } else
3409                 /* Device expects a multiple of 8 */
3410                 iwl_write32(priv, FH39_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3411
3412
3413         q->need_update = 0;
3414
3415  exit_unlock:
3416         spin_unlock_irqrestore(&q->lock, flags);
3417         return rc;
3418 }
3419
3420 /**
3421  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3422  */
3423 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
3424                                           dma_addr_t dma_addr)
3425 {
3426         return cpu_to_le32((u32)dma_addr);
3427 }
3428
3429 /**
3430  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
3431  *
3432  * If there are slots in the RX queue that need to be restocked,
3433  * and we have free pre-allocated buffers, fill the ranks as much
3434  * as we can, pulling from rx_free.
3435  *
3436  * This moves the 'write' index forward to catch up with 'processed', and
3437  * also updates the memory address in the firmware to reference the new
3438  * target buffer.
3439  */
3440 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
3441 {
3442         struct iwl_rx_queue *rxq = &priv->rxq;
3443         struct list_head *element;
3444         struct iwl_rx_mem_buffer *rxb;
3445         unsigned long flags;
3446         int write, rc;
3447
3448         spin_lock_irqsave(&rxq->lock, flags);
3449         write = rxq->write & ~0x7;
3450         while ((iwl3945_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3451                 /* Get next free Rx buffer, remove from free list */
3452                 element = rxq->rx_free.next;
3453                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
3454                 list_del(element);
3455
3456                 /* Point to Rx buffer via next RBD in circular buffer */
3457                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
3458                 rxq->queue[rxq->write] = rxb;
3459                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3460                 rxq->free_count--;
3461         }
3462         spin_unlock_irqrestore(&rxq->lock, flags);
3463         /* If the pre-allocated buffer pool is dropping low, schedule to
3464          * refill it */
3465         if (rxq->free_count <= RX_LOW_WATERMARK)
3466                 queue_work(priv->workqueue, &priv->rx_replenish);
3467
3468
3469         /* If we've added more space for the firmware to place data, tell it.
3470          * Increment device's write pointer in multiples of 8. */
3471         if ((write != (rxq->write & ~0x7))
3472             || (abs(rxq->write - rxq->read) > 7)) {
3473                 spin_lock_irqsave(&rxq->lock, flags);
3474                 rxq->need_update = 1;
3475                 spin_unlock_irqrestore(&rxq->lock, flags);
3476                 rc = iwl3945_rx_queue_update_write_ptr(priv, rxq);
3477                 if (rc)
3478                         return rc;
3479         }
3480
3481         return 0;
3482 }
3483
3484 /**
3485  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
3486  *
3487  * When moving to rx_free an SKB is allocated for the slot.
3488  *
3489  * Also restock the Rx queue via iwl3945_rx_queue_restock.
3490  * This is called as a scheduled work item (except for during initialization)
3491  */
3492 static void iwl3945_rx_allocate(struct iwl_priv *priv)
3493 {
3494         struct iwl_rx_queue *rxq = &priv->rxq;
3495         struct list_head *element;
3496         struct iwl_rx_mem_buffer *rxb;
3497         unsigned long flags;
3498         spin_lock_irqsave(&rxq->lock, flags);
3499         while (!list_empty(&rxq->rx_used)) {
3500                 element = rxq->rx_used.next;
3501                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
3502
3503                 /* Alloc a new receive buffer */
3504                 rxb->skb =
3505                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
3506                 if (!rxb->skb) {
3507                         if (net_ratelimit())
3508                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
3509                         /* We don't reschedule replenish work here -- we will
3510                          * call the restock method and if it still needs
3511                          * more buffers it will schedule replenish */
3512                         break;
3513                 }
3514
3515                 /* If radiotap head is required, reserve some headroom here.
3516                  * The physical head count is a variable rx_stats->phy_count.
3517                  * We reserve 4 bytes here. Plus these extra bytes, the
3518                  * headroom of the physical head should be enough for the
3519                  * radiotap head that iwl3945 supported. See iwl3945_rt.
3520                  */
3521                 skb_reserve(rxb->skb, 4);
3522
3523                 priv->alloc_rxb_skb++;
3524                 list_del(element);
3525
3526                 /* Get physical address of RB/SKB */
3527                 rxb->real_dma_addr =
3528                     pci_map_single(priv->pci_dev, rxb->skb->data,
3529                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3530                 list_add_tail(&rxb->list, &rxq->rx_free);
3531                 rxq->free_count++;
3532         }
3533         spin_unlock_irqrestore(&rxq->lock, flags);
3534 }
3535
3536 /*
3537  * this should be called while priv->lock is locked
3538  */
3539 static void __iwl3945_rx_replenish(void *data)
3540 {
3541         struct iwl_priv *priv = data;
3542
3543         iwl3945_rx_allocate(priv);
3544         iwl3945_rx_queue_restock(priv);
3545 }
3546
3547
3548 void iwl3945_rx_replenish(void *data)
3549 {
3550         struct iwl_priv *priv = data;
3551         unsigned long flags;
3552
3553         iwl3945_rx_allocate(priv);
3554
3555         spin_lock_irqsave(&priv->lock, flags);
3556         iwl3945_rx_queue_restock(priv);
3557         spin_unlock_irqrestore(&priv->lock, flags);
3558 }
3559
3560 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3561  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3562  * This free routine walks the list of POOL entries and if SKB is set to
3563  * non NULL it is unmapped and freed
3564  */
3565 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
3566 {
3567         int i;
3568         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3569                 if (rxq->pool[i].skb != NULL) {
3570                         pci_unmap_single(priv->pci_dev,
3571                                          rxq->pool[i].real_dma_addr,
3572                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3573                         dev_kfree_skb(rxq->pool[i].skb);
3574                 }
3575         }
3576
3577         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3578                             rxq->dma_addr);
3579         rxq->bd = NULL;
3580 }
3581
3582 int iwl3945_rx_queue_alloc(struct iwl_priv *priv)
3583 {
3584         struct iwl_rx_queue *rxq = &priv->rxq;
3585         struct pci_dev *dev = priv->pci_dev;
3586         int i;
3587
3588         spin_lock_init(&rxq->lock);
3589         INIT_LIST_HEAD(&rxq->rx_free);
3590         INIT_LIST_HEAD(&rxq->rx_used);
3591
3592         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3593         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3594         if (!rxq->bd)
3595                 return -ENOMEM;
3596
3597         /* Fill the rx_used queue with _all_ of the Rx buffers */
3598         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3599                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3600
3601         /* Set us so that we have processed and used all buffers, but have
3602          * not restocked the Rx queue with fresh buffers */
3603         rxq->read = rxq->write = 0;
3604         rxq->free_count = 0;
3605         rxq->need_update = 0;
3606         return 0;
3607 }
3608
3609 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
3610 {
3611         unsigned long flags;
3612         int i;
3613         spin_lock_irqsave(&rxq->lock, flags);
3614         INIT_LIST_HEAD(&rxq->rx_free);
3615         INIT_LIST_HEAD(&rxq->rx_used);
3616         /* Fill the rx_used queue with _all_ of the Rx buffers */
3617         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3618                 /* In the reset function, these buffers may have been allocated
3619                  * to an SKB, so we need to unmap and free potential storage */
3620                 if (rxq->pool[i].skb != NULL) {
3621                         pci_unmap_single(priv->pci_dev,
3622                                          rxq->pool[i].real_dma_addr,
3623                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3624                         priv->alloc_rxb_skb--;
3625                         dev_kfree_skb(rxq->pool[i].skb);
3626                         rxq->pool[i].skb = NULL;
3627                 }
3628                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3629         }
3630
3631         /* Set us so that we have processed and used all buffers, but have
3632          * not restocked the Rx queue with fresh buffers */
3633         rxq->read = rxq->write = 0;
3634         rxq->free_count = 0;
3635         spin_unlock_irqrestore(&rxq->lock, flags);
3636 }
3637
3638 /* Convert linear signal-to-noise ratio into dB */
3639 static u8 ratio2dB[100] = {
3640 /*       0   1   2   3   4   5   6   7   8   9 */
3641          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3642         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3643         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3644         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3645         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3646         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3647         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3648         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3649         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3650         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3651 };
3652
3653 /* Calculates a relative dB value from a ratio of linear
3654  *   (i.e. not dB) signal levels.
3655  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3656 int iwl3945_calc_db_from_ratio(int sig_ratio)
3657 {
3658         /* 1000:1 or higher just report as 60 dB */
3659         if (sig_ratio >= 1000)
3660                 return 60;
3661
3662         /* 100:1 or higher, divide by 10 and use table,
3663          *   add 20 dB to make up for divide by 10 */
3664         if (sig_ratio >= 100)
3665                 return 20 + (int)ratio2dB[sig_ratio/10];
3666
3667         /* We shouldn't see this */
3668         if (sig_ratio < 1)
3669                 return 0;
3670
3671         /* Use table for ratios 1:1 - 99:1 */
3672         return (int)ratio2dB[sig_ratio];
3673 }
3674
3675 #define PERFECT_RSSI (-20) /* dBm */
3676 #define WORST_RSSI (-95)   /* dBm */
3677 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3678
3679 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3680  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3681  *   about formulas used below. */
3682 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3683 {
3684         int sig_qual;
3685         int degradation = PERFECT_RSSI - rssi_dbm;
3686
3687         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3688          * as indicator; formula is (signal dbm - noise dbm).
3689          * SNR at or above 40 is a great signal (100%).
3690          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3691          * Weakest usable signal is usually 10 - 15 dB SNR. */
3692         if (noise_dbm) {
3693                 if (rssi_dbm - noise_dbm >= 40)
3694                         return 100;
3695                 else if (rssi_dbm < noise_dbm)
3696                         return 0;
3697                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3698
3699         /* Else use just the signal level.
3700          * This formula is a least squares fit of data points collected and
3701          *   compared with a reference system that had a percentage (%) display
3702          *   for signal quality. */
3703         } else
3704                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3705                             (15 * RSSI_RANGE + 62 * degradation)) /
3706                            (RSSI_RANGE * RSSI_RANGE);
3707
3708         if (sig_qual > 100)
3709                 sig_qual = 100;
3710         else if (sig_qual < 1)
3711                 sig_qual = 0;
3712
3713         return sig_qual;
3714 }
3715
3716 /**
3717  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3718  *
3719  * Uses the priv->rx_handlers callback function array to invoke
3720  * the appropriate handlers, including command responses,
3721  * frame-received notifications, and other notifications.
3722  */
3723 static void iwl3945_rx_handle(struct iwl_priv *priv)
3724 {
3725         struct iwl_rx_mem_buffer *rxb;
3726         struct iwl_rx_packet *pkt;
3727         struct iwl_rx_queue *rxq = &priv->rxq;
3728         u32 r, i;
3729         int reclaim;
3730         unsigned long flags;
3731         u8 fill_rx = 0;
3732         u32 count = 8;
3733
3734         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3735          * buffer that the driver may process (last buffer filled by ucode). */
3736         r = iwl3945_hw_get_rx_read(priv);
3737         i = rxq->read;
3738
3739         if (iwl3945_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3740                 fill_rx = 1;
3741         /* Rx interrupt, but nothing sent from uCode */
3742         if (i == r)
3743                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3744
3745         while (i != r) {
3746                 rxb = rxq->queue[i];
3747
3748                 /* If an RXB doesn't have a Rx queue slot associated with it,
3749                  * then a bug has been introduced in the queue refilling
3750                  * routines -- catch it here */
3751                 BUG_ON(rxb == NULL);
3752
3753                 rxq->queue[i] = NULL;
3754
3755                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->real_dma_addr,
3756                                             IWL_RX_BUF_SIZE,
3757                                             PCI_DMA_FROMDEVICE);
3758                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
3759
3760                 /* Reclaim a command buffer only if this packet is a response
3761                  *   to a (driver-originated) command.
3762                  * If the packet (e.g. Rx frame) originated from uCode,
3763                  *   there is no command buffer to reclaim.
3764                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3765                  *   but apparently a few don't get set; catch them here. */
3766                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3767                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3768                         (pkt->hdr.cmd != REPLY_TX);
3769
3770                 /* Based on type of command response or notification,
3771                  *   handle those that need handling via function in
3772                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
3773                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3774                         IWL_DEBUG(IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
3775                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3776                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3777                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3778                 } else {
3779                         /* No handling needed */
3780                         IWL_DEBUG(IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
3781                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3782                                 r, i, get_cmd_string(pkt->hdr.cmd),
3783                                 pkt->hdr.cmd);
3784                 }
3785
3786                 if (reclaim) {
3787                         /* Invoke any callbacks, transfer the skb to caller, and
3788                          * fire off the (possibly) blocking iwl3945_send_cmd()
3789                          * as we reclaim the driver command queue */
3790                         if (rxb && rxb->skb)
3791                                 iwl3945_tx_cmd_complete(priv, rxb);
3792                         else
3793                                 IWL_WARN(priv, "Claim null rxb?\n");
3794                 }
3795
3796                 /* For now we just don't re-use anything.  We can tweak this
3797                  * later to try and re-use notification packets and SKBs that
3798                  * fail to Rx correctly */
3799                 if (rxb->skb != NULL) {
3800                         priv->alloc_rxb_skb--;
3801                         dev_kfree_skb_any(rxb->skb);
3802                         rxb->skb = NULL;
3803                 }
3804
3805                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
3806                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
3807                 spin_lock_irqsave(&rxq->lock, flags);
3808                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3809                 spin_unlock_irqrestore(&rxq->lock, flags);
3810                 i = (i + 1) & RX_QUEUE_MASK;
3811                 /* If there are a lot of unused frames,
3812                  * restock the Rx queue so ucode won't assert. */
3813                 if (fill_rx) {
3814                         count++;
3815                         if (count >= 8) {
3816                                 priv->rxq.read = i;
3817                                 __iwl3945_rx_replenish(priv);
3818                                 count = 0;
3819                         }
3820                 }
3821         }
3822
3823         /* Backtrack one entry */
3824         priv->rxq.read = i;
3825         iwl3945_rx_queue_restock(priv);
3826 }
3827
3828 /**
3829  * iwl3945_tx_queue_update_write_ptr - Send new write index to hardware
3830  */
3831 static int iwl3945_tx_queue_update_write_ptr(struct iwl_priv *priv,
3832                                   struct iwl3945_tx_queue *txq)
3833 {
3834         u32 reg = 0;
3835         int rc = 0;
3836         int txq_id = txq->q.id;
3837
3838         if (txq->need_update == 0)
3839                 return rc;
3840
3841         /* if we're trying to save power */
3842         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3843                 /* wake up nic if it's powered down ...
3844                  * uCode will wake up, and interrupt us again, so next
3845                  * time we'll skip this part. */
3846                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3847
3848                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3849                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
3850                         iwl_set_bit(priv, CSR_GP_CNTRL,
3851                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3852                         return rc;
3853                 }
3854
3855                 /* restore this queue's parameters in nic hardware. */
3856                 rc = iwl_grab_nic_access(priv);
3857                 if (rc)
3858                         return rc;
3859                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
3860                                      txq->q.write_ptr | (txq_id << 8));
3861                 iwl_release_nic_access(priv);
3862
3863         /* else not in power-save mode, uCode will never sleep when we're
3864          * trying to tx (during RFKILL, we're not trying to tx). */
3865         } else
3866                 iwl_write32(priv, HBUS_TARG_WRPTR,
3867                             txq->q.write_ptr | (txq_id << 8));
3868
3869         txq->need_update = 0;
3870
3871         return rc;
3872 }
3873
3874 #ifdef CONFIG_IWL3945_DEBUG
3875 static void iwl3945_print_rx_config_cmd(struct iwl_priv *priv,
3876                                         struct iwl3945_rxon_cmd *rxon)
3877 {
3878         IWL_DEBUG_RADIO("RX CONFIG:\n");
3879         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3880         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3881         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3882         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3883                         le32_to_cpu(rxon->filter_flags));
3884         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3885         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3886                         rxon->ofdm_basic_rates);
3887         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3888         IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
3889         IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
3890         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3891 }
3892 #endif
3893
3894 static void iwl3945_enable_interrupts(struct iwl_priv *priv)
3895 {
3896         IWL_DEBUG_ISR("Enabling interrupts\n");
3897         set_bit(STATUS_INT_ENABLED, &priv->status);
3898         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3899 }
3900
3901
3902 /* call this function to flush any scheduled tasklet */
3903 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3904 {
3905         /* wait to make sure we flush pending tasklet*/
3906         synchronize_irq(priv->pci_dev->irq);
3907         tasklet_kill(&priv->irq_tasklet);
3908 }
3909
3910
3911 static inline void iwl3945_disable_interrupts(struct iwl_priv *priv)
3912 {
3913         clear_bit(STATUS_INT_ENABLED, &priv->status);
3914
3915         /* disable interrupts from uCode/NIC to host */
3916         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3917
3918         /* acknowledge/clear/reset any interrupts still pending
3919          * from uCode or flow handler (Rx/Tx DMA) */
3920         iwl_write32(priv, CSR_INT, 0xffffffff);
3921         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3922         IWL_DEBUG_ISR("Disabled interrupts\n");
3923 }
3924
3925 static const char *desc_lookup(int i)
3926 {
3927         switch (i) {
3928         case 1:
3929                 return "FAIL";
3930         case 2:
3931                 return "BAD_PARAM";
3932         case 3:
3933                 return "BAD_CHECKSUM";
3934         case 4:
3935                 return "NMI_INTERRUPT";
3936         case 5:
3937                 return "SYSASSERT";
3938         case 6:
3939                 return "FATAL_ERROR";
3940         }
3941
3942         return "UNKNOWN";
3943 }
3944
3945 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3946 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3947
3948 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
3949 {
3950         u32 i;
3951         u32 desc, time, count, base, data1;
3952         u32 blink1, blink2, ilink1, ilink2;
3953         int rc;
3954
3955         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3956
3957         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
3958                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
3959                 return;
3960         }
3961
3962         rc = iwl_grab_nic_access(priv);
3963         if (rc) {
3964                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
3965                 return;
3966         }
3967
3968         count = iwl_read_targ_mem(priv, base);
3969
3970         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3971                 IWL_ERROR("Start IWL Error Log Dump:\n");
3972                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
3973         }
3974
3975         IWL_ERROR("Desc       Time       asrtPC  blink2 "
3976                   "ilink1  nmiPC   Line\n");
3977         for (i = ERROR_START_OFFSET;
3978              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
3979              i += ERROR_ELEM_SIZE) {
3980                 desc = iwl_read_targ_mem(priv, base + i);
3981                 time =
3982                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
3983                 blink1 =
3984                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
3985                 blink2 =
3986                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
3987                 ilink1 =
3988                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
3989                 ilink2 =
3990                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
3991                 data1 =
3992                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
3993
3994                 IWL_ERROR
3995                     ("%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
3996                      desc_lookup(desc), desc, time, blink1, blink2,
3997                      ilink1, ilink2, data1);
3998         }
3999
4000         iwl_release_nic_access(priv);
4001
4002 }
4003
4004 #define EVENT_START_OFFSET  (6 * sizeof(u32))
4005
4006 /**
4007  * iwl3945_print_event_log - Dump error event log to syslog
4008  *
4009  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4010  */
4011 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
4012                                 u32 num_events, u32 mode)
4013 {
4014         u32 i;
4015         u32 base;       /* SRAM byte address of event log header */
4016         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4017         u32 ptr;        /* SRAM byte address of log data */
4018         u32 ev, time, data; /* event log data */
4019
4020         if (num_events == 0)
4021                 return;
4022
4023         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4024
4025         if (mode == 0)
4026                 event_size = 2 * sizeof(u32);
4027         else
4028                 event_size = 3 * sizeof(u32);
4029
4030         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4031
4032         /* "time" is actually "data" for mode 0 (no timestamp).
4033          * place event id # at far right for easier visual parsing. */
4034         for (i = 0; i < num_events; i++) {
4035                 ev = iwl_read_targ_mem(priv, ptr);
4036                 ptr += sizeof(u32);
4037                 time = iwl_read_targ_mem(priv, ptr);
4038                 ptr += sizeof(u32);
4039                 if (mode == 0)
4040                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4041                 else {
4042                         data = iwl_read_targ_mem(priv, ptr);
4043                         ptr += sizeof(u32);
4044                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4045                 }
4046         }
4047 }
4048
4049 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
4050 {
4051         int rc;
4052         u32 base;       /* SRAM byte address of event log header */
4053         u32 capacity;   /* event log capacity in # entries */
4054         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4055         u32 num_wraps;  /* # times uCode wrapped to top of log */
4056         u32 next_entry; /* index of next entry to be written by uCode */
4057         u32 size;       /* # entries that we'll print */
4058
4059         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4060         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
4061                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4062                 return;
4063         }
4064
4065         rc = iwl_grab_nic_access(priv);
4066         if (rc) {
4067                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
4068                 return;
4069         }
4070
4071         /* event log header */
4072         capacity = iwl_read_targ_mem(priv, base);
4073         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4074         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4075         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4076
4077         size = num_wraps ? capacity : next_entry;
4078
4079         /* bail out if nothing in log */
4080         if (size == 0) {
4081                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4082                 iwl_release_nic_access(priv);
4083                 return;
4084         }
4085
4086         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4087                   size, num_wraps);
4088
4089         /* if uCode has wrapped back to top of log, start at the oldest entry,
4090          * i.e the next one that uCode would fill. */
4091         if (num_wraps)
4092                 iwl3945_print_event_log(priv, next_entry,
4093                                     capacity - next_entry, mode);
4094
4095         /* (then/else) start at top of log */
4096         iwl3945_print_event_log(priv, 0, next_entry, mode);
4097
4098         iwl_release_nic_access(priv);
4099 }
4100
4101 /**
4102  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
4103  */
4104 static void iwl3945_irq_handle_error(struct iwl_priv *priv)
4105 {
4106         /* Set the FW error flag -- cleared on iwl3945_down */
4107         set_bit(STATUS_FW_ERROR, &priv->status);
4108
4109         /* Cancel currently queued command. */
4110         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4111
4112 #ifdef CONFIG_IWL3945_DEBUG
4113         if (priv->debug_level & IWL_DL_FW_ERRORS) {
4114                 iwl3945_dump_nic_error_log(priv);
4115                 iwl3945_dump_nic_event_log(priv);
4116                 iwl3945_print_rx_config_cmd(priv, &priv->staging39_rxon);
4117         }
4118 #endif
4119
4120         wake_up_interruptible(&priv->wait_command_queue);
4121
4122         /* Keep the restart process from trying to send host
4123          * commands by clearing the INIT status bit */
4124         clear_bit(STATUS_READY, &priv->status);
4125
4126         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4127                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4128                           "Restarting adapter due to uCode error.\n");
4129
4130                 if (iwl3945_is_associated(priv)) {
4131                         memcpy(&priv->recovery39_rxon, &priv->active39_rxon,
4132                                sizeof(priv->recovery39_rxon));
4133                         priv->error_recovering = 1;
4134                 }
4135                 queue_work(priv->workqueue, &priv->restart);
4136         }
4137 }
4138
4139 static void iwl3945_error_recovery(struct iwl_priv *priv)
4140 {
4141         unsigned long flags;
4142
4143         memcpy(&priv->staging39_rxon, &priv->recovery39_rxon,
4144                sizeof(priv->staging39_rxon));
4145         priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4146         iwl3945_commit_rxon(priv);
4147
4148         iwl3945_add_station(priv, priv->bssid, 1, 0);
4149
4150         spin_lock_irqsave(&priv->lock, flags);
4151         priv->assoc_id = le16_to_cpu(priv->staging39_rxon.assoc_id);
4152         priv->error_recovering = 0;
4153         spin_unlock_irqrestore(&priv->lock, flags);
4154 }
4155
4156 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
4157 {
4158         u32 inta, handled = 0;
4159         u32 inta_fh;
4160         unsigned long flags;
4161 #ifdef CONFIG_IWL3945_DEBUG
4162         u32 inta_mask;
4163 #endif
4164
4165         spin_lock_irqsave(&priv->lock, flags);
4166
4167         /* Ack/clear/reset pending uCode interrupts.
4168          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4169          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4170         inta = iwl_read32(priv, CSR_INT);
4171         iwl_write32(priv, CSR_INT, inta);
4172
4173         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4174          * Any new interrupts that happen after this, either while we're
4175          * in this tasklet, or later, will show up in next ISR/tasklet. */
4176         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4177         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4178
4179 #ifdef CONFIG_IWL3945_DEBUG
4180         if (priv->debug_level & IWL_DL_ISR) {
4181                 /* just for debug */
4182                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4183                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4184                               inta, inta_mask, inta_fh);
4185         }
4186 #endif
4187
4188         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4189          * atomic, make sure that inta covers all the interrupts that
4190          * we've discovered, even if FH interrupt came in just after
4191          * reading CSR_INT. */
4192         if (inta_fh & CSR39_FH_INT_RX_MASK)
4193                 inta |= CSR_INT_BIT_FH_RX;
4194         if (inta_fh & CSR39_FH_INT_TX_MASK)
4195                 inta |= CSR_INT_BIT_FH_TX;
4196
4197         /* Now service all interrupt bits discovered above. */
4198         if (inta & CSR_INT_BIT_HW_ERR) {
4199                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4200
4201                 /* Tell the device to stop sending interrupts */
4202                 iwl3945_disable_interrupts(priv);
4203
4204                 iwl3945_irq_handle_error(priv);
4205
4206                 handled |= CSR_INT_BIT_HW_ERR;
4207
4208                 spin_unlock_irqrestore(&priv->lock, flags);
4209
4210                 return;
4211         }
4212
4213 #ifdef CONFIG_IWL3945_DEBUG
4214         if (priv->debug_level & (IWL_DL_ISR)) {
4215                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4216                 if (inta & CSR_INT_BIT_SCD)
4217                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4218                                       "the frame/frames.\n");
4219
4220                 /* Alive notification via Rx interrupt will do the real work */
4221                 if (inta & CSR_INT_BIT_ALIVE)
4222                         IWL_DEBUG_ISR("Alive interrupt\n");
4223         }
4224 #endif
4225         /* Safely ignore these bits for debug checks below */
4226         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4227
4228         /* Error detected by uCode */
4229         if (inta & CSR_INT_BIT_SW_ERR) {
4230                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4231                           inta);
4232                 iwl3945_irq_handle_error(priv);
4233                 handled |= CSR_INT_BIT_SW_ERR;
4234         }
4235
4236         /* uCode wakes up after power-down sleep */
4237         if (inta & CSR_INT_BIT_WAKEUP) {
4238                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4239                 iwl3945_rx_queue_update_write_ptr(priv, &priv->rxq);
4240                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq39[0]);
4241                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq39[1]);
4242                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq39[2]);
4243                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq39[3]);
4244                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq39[4]);
4245                 iwl3945_tx_queue_update_write_ptr(priv, &priv->txq39[5]);
4246
4247                 handled |= CSR_INT_BIT_WAKEUP;
4248         }
4249
4250         /* All uCode command responses, including Tx command responses,
4251          * Rx "responses" (frame-received notification), and other
4252          * notifications from uCode come through here*/
4253         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4254                 iwl3945_rx_handle(priv);
4255                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4256         }
4257
4258         if (inta & CSR_INT_BIT_FH_TX) {
4259                 IWL_DEBUG_ISR("Tx interrupt\n");
4260
4261                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
4262                 if (!iwl_grab_nic_access(priv)) {
4263                         iwl_write_direct32(priv, FH39_TCSR_CREDIT
4264                                              (FH39_SRVC_CHNL), 0x0);
4265                         iwl_release_nic_access(priv);
4266                 }
4267                 handled |= CSR_INT_BIT_FH_TX;
4268         }
4269
4270         if (inta & ~handled)
4271                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4272
4273         if (inta & ~CSR_INI_SET_MASK) {
4274                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
4275                          inta & ~CSR_INI_SET_MASK);
4276                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
4277         }
4278
4279         /* Re-enable all interrupts */
4280         /* only Re-enable if disabled by irq */
4281         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4282                 iwl3945_enable_interrupts(priv);
4283
4284 #ifdef CONFIG_IWL3945_DEBUG
4285         if (priv->debug_level & (IWL_DL_ISR)) {
4286                 inta = iwl_read32(priv, CSR_INT);
4287                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4288                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4289                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4290                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4291         }
4292 #endif
4293         spin_unlock_irqrestore(&priv->lock, flags);
4294 }
4295
4296 static irqreturn_t iwl3945_isr(int irq, void *data)
4297 {
4298         struct iwl_priv *priv = data;
4299         u32 inta, inta_mask;
4300         u32 inta_fh;
4301         if (!priv)
4302                 return IRQ_NONE;
4303
4304         spin_lock(&priv->lock);
4305
4306         /* Disable (but don't clear!) interrupts here to avoid
4307          *    back-to-back ISRs and sporadic interrupts from our NIC.
4308          * If we have something to service, the tasklet will re-enable ints.
4309          * If we *don't* have something, we'll re-enable before leaving here. */
4310         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4311         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4312
4313         /* Discover which interrupts are active/pending */
4314         inta = iwl_read32(priv, CSR_INT);
4315         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4316
4317         /* Ignore interrupt if there's nothing in NIC to service.
4318          * This may be due to IRQ shared with another device,
4319          * or due to sporadic interrupts thrown from our NIC. */
4320         if (!inta && !inta_fh) {
4321                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4322                 goto none;
4323         }
4324
4325         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4326                 /* Hardware disappeared */
4327                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
4328                 goto unplugged;
4329         }
4330
4331         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4332                       inta, inta_mask, inta_fh);
4333
4334         inta &= ~CSR_INT_BIT_SCD;
4335
4336         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
4337         if (likely(inta || inta_fh))
4338                 tasklet_schedule(&priv->irq_tasklet);
4339 unplugged:
4340         spin_unlock(&priv->lock);
4341
4342         return IRQ_HANDLED;
4343
4344  none:
4345         /* re-enable interrupts here since we don't have anything to service. */
4346         /* only Re-enable if disabled by irq */
4347         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4348                 iwl3945_enable_interrupts(priv);
4349         spin_unlock(&priv->lock);
4350         return IRQ_NONE;
4351 }
4352
4353 /************************** EEPROM BANDS ****************************
4354  *
4355  * The iwl3945_eeprom_band definitions below provide the mapping from the
4356  * EEPROM contents to the specific channel number supported for each
4357  * band.
4358  *
4359  * For example, iwl3945_priv->eeprom39.band_3_channels[4] from the band_3
4360  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
4361  * The specific geography and calibration information for that channel
4362  * is contained in the eeprom map itself.
4363  *
4364  * During init, we copy the eeprom information and channel map
4365  * information into priv->channel_info_24/52 and priv->channel_map_24/52
4366  *
4367  * channel_map_24/52 provides the index in the channel_info array for a
4368  * given channel.  We have to have two separate maps as there is channel
4369  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
4370  * band_2
4371  *
4372  * A value of 0xff stored in the channel_map indicates that the channel
4373  * is not supported by the hardware at all.
4374  *
4375  * A value of 0xfe in the channel_map indicates that the channel is not
4376  * valid for Tx with the current hardware.  This means that
4377  * while the system can tune and receive on a given channel, it may not
4378  * be able to associate or transmit any frames on that
4379  * channel.  There is no corresponding channel information for that
4380  * entry.
4381  *
4382  *********************************************************************/
4383
4384 /* 2.4 GHz */
4385 static const u8 iwl3945_eeprom_band_1[14] = {
4386         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
4387 };
4388
4389 /* 5.2 GHz bands */
4390 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
4391         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
4392 };
4393
4394 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
4395         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
4396 };
4397
4398 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
4399         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
4400 };
4401
4402 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
4403         145, 149, 153, 157, 161, 165
4404 };
4405
4406 static void iwl3945_init_band_reference(const struct iwl_priv *priv, int band,
4407                                     int *eeprom_ch_count,
4408                                     const struct iwl_eeprom_channel
4409                                     **eeprom_ch_info,
4410                                     const u8 **eeprom_ch_index)
4411 {
4412         switch (band) {
4413         case 1:         /* 2.4GHz band */
4414                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
4415                 *eeprom_ch_info = priv->eeprom39.band_1_channels;
4416                 *eeprom_ch_index = iwl3945_eeprom_band_1;
4417                 break;
4418         case 2:         /* 4.9GHz band */
4419                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
4420                 *eeprom_ch_info = priv->eeprom39.band_2_channels;
4421                 *eeprom_ch_index = iwl3945_eeprom_band_2;
4422                 break;
4423         case 3:         /* 5.2GHz band */
4424                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
4425                 *eeprom_ch_info = priv->eeprom39.band_3_channels;
4426                 *eeprom_ch_index = iwl3945_eeprom_band_3;
4427                 break;
4428         case 4:         /* 5.5GHz band */
4429                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
4430                 *eeprom_ch_info = priv->eeprom39.band_4_channels;
4431                 *eeprom_ch_index = iwl3945_eeprom_band_4;
4432                 break;
4433         case 5:         /* 5.7GHz band */
4434                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
4435                 *eeprom_ch_info = priv->eeprom39.band_5_channels;
4436                 *eeprom_ch_index = iwl3945_eeprom_band_5;
4437                 break;
4438         default:
4439                 BUG();
4440                 return;
4441         }
4442 }
4443
4444 /**
4445  * iwl3945_get_channel_info - Find driver's private channel info
4446  *
4447  * Based on band and channel number.
4448  */
4449 const struct iwl_channel_info *
4450 iwl3945_get_channel_info(const struct iwl_priv *priv,
4451                          enum ieee80211_band band, u16 channel)
4452 {
4453         int i;
4454
4455         switch (band) {
4456         case IEEE80211_BAND_5GHZ:
4457                 for (i = 14; i < priv->channel_count; i++) {
4458                         if (priv->channel_info[i].channel == channel)
4459                                 return &priv->channel_info[i];
4460                 }
4461                 break;
4462
4463         case IEEE80211_BAND_2GHZ:
4464                 if (channel >= 1 && channel <= 14)
4465                         return &priv->channel_info[channel - 1];
4466                 break;
4467         case IEEE80211_NUM_BANDS:
4468                 WARN_ON(1);
4469         }
4470
4471         return NULL;
4472 }
4473
4474 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
4475                             ? # x " " : "")
4476
4477 /**
4478  * iwl3945_init_channel_map - Set up driver's info for all possible channels
4479  */
4480 static int iwl3945_init_channel_map(struct iwl_priv *priv)
4481 {
4482         int eeprom_ch_count = 0;
4483         const u8 *eeprom_ch_index = NULL;
4484         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
4485         int band, ch;
4486         struct iwl_channel_info *ch_info;
4487
4488         if (priv->channel_count) {
4489                 IWL_DEBUG_INFO("Channel map already initialized.\n");
4490                 return 0;
4491         }
4492
4493         if (priv->eeprom39.version < 0x2f) {
4494                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
4495                             priv->eeprom39.version);
4496                 return -EINVAL;
4497         }
4498
4499         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
4500
4501         priv->channel_count =
4502             ARRAY_SIZE(iwl3945_eeprom_band_1) +
4503             ARRAY_SIZE(iwl3945_eeprom_band_2) +
4504             ARRAY_SIZE(iwl3945_eeprom_band_3) +
4505             ARRAY_SIZE(iwl3945_eeprom_band_4) +
4506             ARRAY_SIZE(iwl3945_eeprom_band_5);
4507
4508         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
4509
4510         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
4511                                      priv->channel_count, GFP_KERNEL);
4512         if (!priv->channel_info) {
4513                 IWL_ERROR("Could not allocate channel_info\n");
4514                 priv->channel_count = 0;
4515                 return -ENOMEM;
4516         }
4517
4518         ch_info = priv->channel_info;
4519
4520         /* Loop through the 5 EEPROM bands adding them in order to the
4521          * channel map we maintain (that contains additional information than
4522          * what just in the EEPROM) */
4523         for (band = 1; band <= 5; band++) {
4524
4525                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
4526                                         &eeprom_ch_info, &eeprom_ch_index);
4527
4528                 /* Loop through each band adding each of the channels */
4529                 for (ch = 0; ch < eeprom_ch_count; ch++) {
4530                         ch_info->channel = eeprom_ch_index[ch];
4531                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
4532                             IEEE80211_BAND_5GHZ;
4533
4534                         /* permanently store EEPROM's channel regulatory flags
4535                          *   and max power in channel info database. */
4536                         ch_info->eeprom = eeprom_ch_info[ch];
4537
4538                         /* Copy the run-time flags so they are there even on
4539                          * invalid channels */
4540                         ch_info->flags = eeprom_ch_info[ch].flags;
4541
4542                         if (!(is_channel_valid(ch_info))) {
4543                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
4544                                                "No traffic\n",
4545                                                ch_info->channel,
4546                                                ch_info->flags,
4547                                                is_channel_a_band(ch_info) ?
4548                                                "5.2" : "2.4");
4549                                 ch_info++;
4550                                 continue;
4551                         }
4552
4553                         /* Initialize regulatory-based run-time data */
4554                         ch_info->max_power_avg = ch_info->curr_txpow =
4555                             eeprom_ch_info[ch].max_power_avg;
4556                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
4557                         ch_info->min_power = 0;
4558
4559                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
4560                                        " %ddBm): Ad-Hoc %ssupported\n",
4561                                        ch_info->channel,
4562                                        is_channel_a_band(ch_info) ?
4563                                        "5.2" : "2.4",
4564                                        CHECK_AND_PRINT(VALID),
4565                                        CHECK_AND_PRINT(IBSS),
4566                                        CHECK_AND_PRINT(ACTIVE),
4567                                        CHECK_AND_PRINT(RADAR),
4568                                        CHECK_AND_PRINT(WIDE),
4569                                        CHECK_AND_PRINT(DFS),
4570                                        eeprom_ch_info[ch].flags,
4571                                        eeprom_ch_info[ch].max_power_avg,
4572                                        ((eeprom_ch_info[ch].
4573                                          flags & EEPROM_CHANNEL_IBSS)
4574                                         && !(eeprom_ch_info[ch].
4575                                              flags & EEPROM_CHANNEL_RADAR))
4576                                        ? "" : "not ");
4577
4578                         /* Set the user_txpower_limit to the highest power
4579                          * supported by any channel */
4580                         if (eeprom_ch_info[ch].max_power_avg >
4581                             priv->user_txpower_limit)
4582                                 priv->user_txpower_limit =
4583                                     eeprom_ch_info[ch].max_power_avg;
4584
4585                         ch_info++;
4586                 }
4587         }
4588
4589         /* Set up txpower settings in driver for all channels */
4590         if (iwl3945_txpower_set_from_eeprom(priv))
4591                 return -EIO;
4592
4593         return 0;
4594 }
4595
4596 /*
4597  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
4598  */
4599 static void iwl3945_free_channel_map(struct iwl_priv *priv)
4600 {
4601         kfree(priv->channel_info);
4602         priv->channel_count = 0;
4603 }
4604
4605 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4606  * sending probe req.  This should be set long enough to hear probe responses
4607  * from more than one AP.  */
4608 #define IWL_ACTIVE_DWELL_TIME_24    (30)        /* all times in msec */
4609 #define IWL_ACTIVE_DWELL_TIME_52    (20)
4610
4611 #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
4612 #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
4613
4614 /* For faster active scanning, scan will move to the next channel if fewer than
4615  * PLCP_QUIET_THRESH packets are heard on this channel within
4616  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4617  * time if it's a quiet channel (nothing responded to our probe, and there's
4618  * no other traffic).
4619  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4620 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4621 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(10)  /* msec */
4622
4623 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4624  * Must be set longer than active dwell time.
4625  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4626 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4627 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4628 #define IWL_PASSIVE_DWELL_BASE      (100)
4629 #define IWL_CHANNEL_TUNE_TIME       5
4630
4631 #define IWL_SCAN_PROBE_MASK(n)   (BIT(n) | (BIT(n) - BIT(1)))
4632
4633 static inline u16 iwl3945_get_active_dwell_time(struct iwl_priv *priv,
4634                                                 enum ieee80211_band band,
4635                                                 u8 n_probes)
4636 {
4637         if (band == IEEE80211_BAND_5GHZ)
4638                 return IWL_ACTIVE_DWELL_TIME_52 +
4639                         IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
4640         else
4641                 return IWL_ACTIVE_DWELL_TIME_24 +
4642                         IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
4643 }
4644
4645 static u16 iwl3945_get_passive_dwell_time(struct iwl_priv *priv,
4646                                           enum ieee80211_band band)
4647 {
4648         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4649             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4650             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4651
4652         if (iwl3945_is_associated(priv)) {
4653                 /* If we're associated, we clamp the maximum passive
4654                  * dwell time to be 98% of the beacon interval (minus
4655                  * 2 * channel tune time) */
4656                 passive = priv->beacon_int;
4657                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4658                         passive = IWL_PASSIVE_DWELL_BASE;
4659                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4660         }
4661
4662         return passive;
4663 }
4664
4665 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
4666                                          enum ieee80211_band band,
4667                                      u8 is_active, u8 n_probes,
4668                                      struct iwl3945_scan_channel *scan_ch)
4669 {
4670         const struct ieee80211_channel *channels = NULL;
4671         const struct ieee80211_supported_band *sband;
4672         const struct iwl_channel_info *ch_info;
4673         u16 passive_dwell = 0;
4674         u16 active_dwell = 0;
4675         int added, i;
4676
4677         sband = iwl3945_get_band(priv, band);
4678         if (!sband)
4679                 return 0;
4680
4681         channels = sband->channels;
4682
4683         active_dwell = iwl3945_get_active_dwell_time(priv, band, n_probes);
4684         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4685
4686         if (passive_dwell <= active_dwell)
4687                 passive_dwell = active_dwell + 1;
4688
4689         for (i = 0, added = 0; i < sband->n_channels; i++) {
4690                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4691                         continue;
4692
4693                 scan_ch->channel = channels[i].hw_value;
4694
4695                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4696                 if (!is_channel_valid(ch_info)) {
4697                         IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
4698                                        scan_ch->channel);
4699                         continue;
4700                 }
4701
4702                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4703                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4704                 /* If passive , set up for auto-switch
4705                  *  and use long active_dwell time.
4706                  */
4707                 if (!is_active || is_channel_passive(ch_info) ||
4708                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
4709                         scan_ch->type = 0;      /* passive */
4710                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
4711                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
4712                 } else {
4713                         scan_ch->type = 1;      /* active */
4714                 }
4715
4716                 /* Set direct probe bits. These may be used both for active
4717                  * scan channels (probes gets sent right away),
4718                  * or for passive channels (probes get se sent only after
4719                  * hearing clear Rx packet).*/
4720                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
4721                         if (n_probes)
4722                                 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4723                 } else {
4724                         /* uCode v1 does not allow setting direct probe bits on
4725                          * passive channel. */
4726                         if ((scan_ch->type & 1) && n_probes)
4727                                 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4728                 }
4729
4730                 /* Set txpower levels to defaults */
4731                 scan_ch->tpc.dsp_atten = 110;
4732                 /* scan_pwr_info->tpc.dsp_atten; */
4733
4734                 /*scan_pwr_info->tpc.tx_gain; */
4735                 if (band == IEEE80211_BAND_5GHZ)
4736                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4737                 else {
4738                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4739                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4740                          * power level:
4741                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4742                          */
4743                 }
4744
4745                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4746                                scan_ch->channel,
4747                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4748                                (scan_ch->type & 1) ?
4749                                active_dwell : passive_dwell);
4750
4751                 scan_ch++;
4752                 added++;
4753         }
4754
4755         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4756         return added;
4757 }
4758
4759 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
4760                               struct ieee80211_rate *rates)
4761 {
4762         int i;
4763
4764         for (i = 0; i < IWL_RATE_COUNT; i++) {
4765                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
4766                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4767                 rates[i].hw_value_short = i;
4768                 rates[i].flags = 0;
4769                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4770                         /*
4771                          * If CCK != 1M then set short preamble rate flag.
4772                          */
4773                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
4774                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4775                 }
4776         }
4777 }
4778
4779 /**
4780  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
4781  */
4782 static int iwl3945_init_geos(struct iwl_priv *priv)
4783 {
4784         struct iwl_channel_info *ch;
4785         struct ieee80211_supported_band *sband;
4786         struct ieee80211_channel *channels;
4787         struct ieee80211_channel *geo_ch;
4788         struct ieee80211_rate *rates;
4789         int i = 0;
4790
4791         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4792             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4793                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4794                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4795                 return 0;
4796         }
4797
4798         channels = kzalloc(sizeof(struct ieee80211_channel) *
4799                            priv->channel_count, GFP_KERNEL);
4800         if (!channels)
4801                 return -ENOMEM;
4802
4803         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4804                         GFP_KERNEL);
4805         if (!rates) {
4806                 kfree(channels);
4807                 return -ENOMEM;
4808         }
4809
4810         /* 5.2GHz channels start after the 2.4GHz channels */
4811         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4812         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
4813         /* just OFDM */
4814         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4815         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4816
4817         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4818         sband->channels = channels;
4819         /* OFDM & CCK */
4820         sband->bitrates = rates;
4821         sband->n_bitrates = IWL_RATE_COUNT;
4822
4823         priv->ieee_channels = channels;
4824         priv->ieee_rates = rates;
4825
4826         iwl3945_init_hw_rates(priv, rates);
4827
4828         for (i = 0;  i < priv->channel_count; i++) {
4829                 ch = &priv->channel_info[i];
4830
4831                 /* FIXME: might be removed if scan is OK*/
4832                 if (!is_channel_valid(ch))
4833                         continue;
4834
4835                 if (is_channel_a_band(ch))
4836                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4837                 else
4838                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4839
4840                 geo_ch = &sband->channels[sband->n_channels++];
4841
4842                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4843                 geo_ch->max_power = ch->max_power_avg;
4844                 geo_ch->max_antenna_gain = 0xff;
4845                 geo_ch->hw_value = ch->channel;
4846
4847                 if (is_channel_valid(ch)) {
4848                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4849                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4850
4851                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4852                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4853
4854                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4855                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4856
4857                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4858                                 priv->max_channel_txpower_limit =
4859                                     ch->max_power_avg;
4860                 } else {
4861                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4862                 }
4863
4864                 /* Save flags for reg domain usage */
4865                 geo_ch->orig_flags = geo_ch->flags;
4866
4867                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4868                                 ch->channel, geo_ch->center_freq,
4869                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4870                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4871                                 "restricted" : "valid",
4872                                  geo_ch->flags);
4873         }
4874
4875         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4876              priv->cfg->sku & IWL_SKU_A) {
4877                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
4878                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
4879                         priv->pci_dev->device, priv->pci_dev->subsystem_device);
4880                  priv->cfg->sku &= ~IWL_SKU_A;
4881         }
4882
4883         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4884                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4885                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4886
4887         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4888                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4889                         &priv->bands[IEEE80211_BAND_2GHZ];
4890         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4891                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4892                         &priv->bands[IEEE80211_BAND_5GHZ];
4893
4894         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4895
4896         return 0;
4897 }
4898
4899 /*
4900  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
4901  */
4902 static void iwl3945_free_geos(struct iwl_priv *priv)
4903 {
4904         kfree(priv->ieee_channels);
4905         kfree(priv->ieee_rates);
4906         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4907 }
4908
4909 /******************************************************************************
4910  *
4911  * uCode download functions
4912  *
4913  ******************************************************************************/
4914
4915 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
4916 {
4917         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4918         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4919         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4920         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4921         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4922         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4923 }
4924
4925 /**
4926  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
4927  *     looking at all data.
4928  */
4929 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
4930 {
4931         u32 val;
4932         u32 save_len = len;
4933         int rc = 0;
4934         u32 errcnt;
4935
4936         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4937
4938         rc = iwl_grab_nic_access(priv);
4939         if (rc)
4940                 return rc;
4941
4942         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4943                                IWL39_RTC_INST_LOWER_BOUND);
4944
4945         errcnt = 0;
4946         for (; len > 0; len -= sizeof(u32), image++) {
4947                 /* read data comes through single port, auto-incr addr */
4948                 /* NOTE: Use the debugless read so we don't flood kernel log
4949                  * if IWL_DL_IO is set */
4950                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4951                 if (val != le32_to_cpu(*image)) {
4952                         IWL_ERROR("uCode INST section is invalid at "
4953                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4954                                   save_len - len, val, le32_to_cpu(*image));
4955                         rc = -EIO;
4956                         errcnt++;
4957                         if (errcnt >= 20)
4958                                 break;
4959                 }
4960         }
4961
4962         iwl_release_nic_access(priv);
4963
4964         if (!errcnt)
4965                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
4966
4967         return rc;
4968 }
4969
4970
4971 /**
4972  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
4973  *   using sample data 100 bytes apart.  If these sample points are good,
4974  *   it's a pretty good bet that everything between them is good, too.
4975  */
4976 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
4977 {
4978         u32 val;
4979         int rc = 0;
4980         u32 errcnt = 0;
4981         u32 i;
4982
4983         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4984
4985         rc = iwl_grab_nic_access(priv);
4986         if (rc)
4987                 return rc;
4988
4989         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
4990                 /* read data comes through single port, auto-incr addr */
4991                 /* NOTE: Use the debugless read so we don't flood kernel log
4992                  * if IWL_DL_IO is set */
4993                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4994                         i + IWL39_RTC_INST_LOWER_BOUND);
4995                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4996                 if (val != le32_to_cpu(*image)) {
4997 #if 0 /* Enable this if you want to see details */
4998                         IWL_ERROR("uCode INST section is invalid at "
4999                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5000                                   i, val, *image);
5001 #endif
5002                         rc = -EIO;
5003                         errcnt++;
5004                         if (errcnt >= 3)
5005                                 break;
5006                 }
5007         }
5008
5009         iwl_release_nic_access(priv);
5010
5011         return rc;
5012 }
5013
5014
5015 /**
5016  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
5017  *    and verify its contents
5018  */
5019 static int iwl3945_verify_ucode(struct iwl_priv *priv)
5020 {
5021         __le32 *image;
5022         u32 len;
5023         int rc = 0;
5024
5025         /* Try bootstrap */
5026         image = (__le32 *)priv->ucode_boot.v_addr;
5027         len = priv->ucode_boot.len;
5028         rc = iwl3945_verify_inst_sparse(priv, image, len);
5029         if (rc == 0) {
5030                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5031                 return 0;
5032         }
5033
5034         /* Try initialize */
5035         image = (__le32 *)priv->ucode_init.v_addr;
5036         len = priv->ucode_init.len;
5037         rc = iwl3945_verify_inst_sparse(priv, image, len);
5038         if (rc == 0) {
5039                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5040                 return 0;
5041         }
5042
5043         /* Try runtime/protocol */
5044         image = (__le32 *)priv->ucode_code.v_addr;
5045         len = priv->ucode_code.len;
5046         rc = iwl3945_verify_inst_sparse(priv, image, len);
5047         if (rc == 0) {
5048                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5049                 return 0;
5050         }
5051
5052         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5053
5054         /* Since nothing seems to match, show first several data entries in
5055          * instruction SRAM, so maybe visual inspection will give a clue.
5056          * Selection of bootstrap image (vs. other images) is arbitrary. */
5057         image = (__le32 *)priv->ucode_boot.v_addr;
5058         len = priv->ucode_boot.len;
5059         rc = iwl3945_verify_inst_full(priv, image, len);
5060
5061         return rc;
5062 }
5063
5064
5065 /* check contents of special bootstrap uCode SRAM */
5066 static int iwl3945_verify_bsm(struct iwl_priv *priv)
5067 {
5068         __le32 *image = priv->ucode_boot.v_addr;
5069         u32 len = priv->ucode_boot.len;
5070         u32 reg;
5071         u32 val;
5072
5073         IWL_DEBUG_INFO("Begin verify bsm\n");
5074
5075         /* verify BSM SRAM contents */
5076         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
5077         for (reg = BSM_SRAM_LOWER_BOUND;
5078              reg < BSM_SRAM_LOWER_BOUND + len;
5079              reg += sizeof(u32), image++) {
5080                 val = iwl_read_prph(priv, reg);
5081                 if (val != le32_to_cpu(*image)) {
5082                         IWL_ERROR("BSM uCode verification failed at "
5083                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
5084                                   BSM_SRAM_LOWER_BOUND,
5085                                   reg - BSM_SRAM_LOWER_BOUND, len,
5086                                   val, le32_to_cpu(*image));
5087                         return -EIO;
5088                 }
5089         }
5090
5091         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
5092
5093         return 0;
5094 }
5095
5096 /**
5097  * iwl3945_load_bsm - Load bootstrap instructions
5098  *
5099  * BSM operation:
5100  *
5101  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
5102  * in special SRAM that does not power down during RFKILL.  When powering back
5103  * up after power-saving sleeps (or during initial uCode load), the BSM loads
5104  * the bootstrap program into the on-board processor, and starts it.
5105  *
5106  * The bootstrap program loads (via DMA) instructions and data for a new
5107  * program from host DRAM locations indicated by the host driver in the
5108  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
5109  * automatically.
5110  *
5111  * When initializing the NIC, the host driver points the BSM to the
5112  * "initialize" uCode image.  This uCode sets up some internal data, then
5113  * notifies host via "initialize alive" that it is complete.
5114  *
5115  * The host then replaces the BSM_DRAM_* pointer values to point to the
5116  * normal runtime uCode instructions and a backup uCode data cache buffer
5117  * (filled initially with starting data values for the on-board processor),
5118  * then triggers the "initialize" uCode to load and launch the runtime uCode,
5119  * which begins normal operation.
5120  *
5121  * When doing a power-save shutdown, runtime uCode saves data SRAM into
5122  * the backup data cache in DRAM before SRAM is powered down.
5123  *
5124  * When powering back up, the BSM loads the bootstrap program.  This reloads
5125  * the runtime uCode instructions and the backup data cache into SRAM,
5126  * and re-launches the runtime uCode from where it left off.
5127  */
5128 static int iwl3945_load_bsm(struct iwl_priv *priv)
5129 {
5130         __le32 *image = priv->ucode_boot.v_addr;
5131         u32 len = priv->ucode_boot.len;
5132         dma_addr_t pinst;
5133         dma_addr_t pdata;
5134         u32 inst_len;
5135         u32 data_len;
5136         int rc;
5137         int i;
5138         u32 done;
5139         u32 reg_offset;
5140
5141         IWL_DEBUG_INFO("Begin load bsm\n");
5142
5143         /* make sure bootstrap program is no larger than BSM's SRAM size */
5144         if (len > IWL39_MAX_BSM_SIZE)
5145                 return -EINVAL;
5146
5147         /* Tell bootstrap uCode where to find the "Initialize" uCode
5148          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
5149          * NOTE:  iwl3945_initialize_alive_start() will replace these values,
5150          *        after the "initialize" uCode has run, to point to
5151          *        runtime/protocol instructions and backup data cache. */
5152         pinst = priv->ucode_init.p_addr;
5153         pdata = priv->ucode_init_data.p_addr;
5154         inst_len = priv->ucode_init.len;
5155         data_len = priv->ucode_init_data.len;
5156
5157         rc = iwl_grab_nic_access(priv);
5158         if (rc)
5159                 return rc;
5160
5161         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5162         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5163         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
5164         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
5165
5166         /* Fill BSM memory with bootstrap instructions */
5167         for (reg_offset = BSM_SRAM_LOWER_BOUND;
5168              reg_offset < BSM_SRAM_LOWER_BOUND + len;
5169              reg_offset += sizeof(u32), image++)
5170                 _iwl_write_prph(priv, reg_offset,
5171                                           le32_to_cpu(*image));
5172
5173         rc = iwl3945_verify_bsm(priv);
5174         if (rc) {
5175                 iwl_release_nic_access(priv);
5176                 return rc;
5177         }
5178
5179         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
5180         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
5181         iwl_write_prph(priv, BSM_WR_MEM_DST_REG,
5182                                  IWL39_RTC_INST_LOWER_BOUND);
5183         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
5184
5185         /* Load bootstrap code into instruction SRAM now,
5186          *   to prepare to load "initialize" uCode */
5187         iwl_write_prph(priv, BSM_WR_CTRL_REG,
5188                 BSM_WR_CTRL_REG_BIT_START);
5189
5190         /* Wait for load of bootstrap uCode to finish */
5191         for (i = 0; i < 100; i++) {
5192                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
5193                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
5194                         break;
5195                 udelay(10);
5196         }
5197         if (i < 100)
5198                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
5199         else {
5200                 IWL_ERROR("BSM write did not complete!\n");
5201                 return -EIO;
5202         }
5203
5204         /* Enable future boot loads whenever power management unit triggers it
5205          *   (e.g. when powering back up after power-save shutdown) */
5206         iwl_write_prph(priv, BSM_WR_CTRL_REG,
5207                 BSM_WR_CTRL_REG_BIT_START_EN);
5208
5209         iwl_release_nic_access(priv);
5210
5211         return 0;
5212 }
5213
5214 static void iwl3945_nic_start(struct iwl_priv *priv)
5215 {
5216         /* Remove all resets to allow NIC to operate */
5217         iwl_write32(priv, CSR_RESET, 0);
5218 }
5219
5220 /**
5221  * iwl3945_read_ucode - Read uCode images from disk file.
5222  *
5223  * Copy into buffers for card to fetch via bus-mastering
5224  */
5225 static int iwl3945_read_ucode(struct iwl_priv *priv)
5226 {
5227         struct iwl_ucode *ucode;
5228         int ret = -EINVAL, index;
5229         const struct firmware *ucode_raw;
5230         /* firmware file name contains uCode/driver compatibility version */
5231         const char *name_pre = priv->cfg->fw_name_pre;
5232         const unsigned int api_max = priv->cfg->ucode_api_max;
5233         const unsigned int api_min = priv->cfg->ucode_api_min;
5234         char buf[25];
5235         u8 *src;
5236         size_t len;
5237         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
5238
5239         /* Ask kernel firmware_class module to get the boot firmware off disk.
5240          * request_firmware() is synchronous, file is in memory on return. */
5241         for (index = api_max; index >= api_min; index--) {
5242                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
5243                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
5244                 if (ret < 0) {
5245                         IWL_ERROR("%s firmware file req failed: Reason %d\n",
5246                                   buf, ret);
5247                         if (ret == -ENOENT)
5248                                 continue;
5249                         else
5250                                 goto error;
5251                 } else {
5252                         if (index < api_max)
5253                                 IWL_ERROR("Loaded firmware %s, which is deprecated. Please use API v%u instead.\n",
5254                                           buf, api_max);
5255                         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5256                                        buf, ucode_raw->size);
5257                         break;
5258                 }
5259         }
5260
5261         if (ret < 0)
5262                 goto error;
5263
5264         /* Make sure that we got at least our header! */
5265         if (ucode_raw->size < sizeof(*ucode)) {
5266                 IWL_ERROR("File size way too small!\n");
5267                 ret = -EINVAL;
5268                 goto err_release;
5269         }
5270
5271         /* Data from ucode file:  header followed by uCode images */
5272         ucode = (void *)ucode_raw->data;
5273
5274         priv->ucode_ver = le32_to_cpu(ucode->ver);
5275         api_ver = IWL_UCODE_API(priv->ucode_ver);
5276         inst_size = le32_to_cpu(ucode->inst_size);
5277         data_size = le32_to_cpu(ucode->data_size);
5278         init_size = le32_to_cpu(ucode->init_size);
5279         init_data_size = le32_to_cpu(ucode->init_data_size);
5280         boot_size = le32_to_cpu(ucode->boot_size);
5281
5282         /* api_ver should match the api version forming part of the
5283          * firmware filename ... but we don't check for that and only rely
5284          * on the API version read from firware header from here on forward */
5285
5286         if (api_ver < api_min || api_ver > api_max) {
5287                 IWL_ERROR("Driver unable to support your firmware API. "
5288                           "Driver supports v%u, firmware is v%u.\n",
5289                           api_max, api_ver);
5290                 priv->ucode_ver = 0;
5291                 ret = -EINVAL;
5292                 goto err_release;
5293         }
5294         if (api_ver != api_max)
5295                 IWL_ERROR("Firmware has old API version. Expected %u, "
5296                           "got %u. New firmware can be obtained "
5297                           "from http://www.intellinuxwireless.org.\n",
5298                           api_max, api_ver);
5299
5300         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
5301                 IWL_UCODE_MAJOR(priv->ucode_ver),
5302                 IWL_UCODE_MINOR(priv->ucode_ver),
5303                 IWL_UCODE_API(priv->ucode_ver),
5304                 IWL_UCODE_SERIAL(priv->ucode_ver));
5305
5306         IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
5307                        priv->ucode_ver);
5308         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
5309         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
5310         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
5311         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
5312         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
5313
5314
5315         /* Verify size of file vs. image size info in file's header */
5316         if (ucode_raw->size < sizeof(*ucode) +
5317                 inst_size + data_size + init_size +
5318                 init_data_size + boot_size) {
5319
5320                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5321                                (int)ucode_raw->size);
5322                 ret = -EINVAL;
5323                 goto err_release;
5324         }
5325
5326         /* Verify that uCode images will fit in card's SRAM */
5327         if (inst_size > IWL39_MAX_INST_SIZE) {
5328                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5329                                inst_size);
5330                 ret = -EINVAL;
5331                 goto err_release;
5332         }
5333
5334         if (data_size > IWL39_MAX_DATA_SIZE) {
5335                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5336                                data_size);
5337                 ret = -EINVAL;
5338                 goto err_release;
5339         }
5340         if (init_size > IWL39_MAX_INST_SIZE) {
5341                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
5342                                 init_size);
5343                 ret = -EINVAL;
5344                 goto err_release;
5345         }
5346         if (init_data_size > IWL39_MAX_DATA_SIZE) {
5347                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
5348                                 init_data_size);
5349                 ret = -EINVAL;
5350                 goto err_release;
5351         }
5352         if (boot_size > IWL39_MAX_BSM_SIZE) {
5353                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
5354                                 boot_size);
5355                 ret = -EINVAL;
5356                 goto err_release;
5357         }
5358
5359         /* Allocate ucode buffers for card's bus-master loading ... */
5360
5361         /* Runtime instructions and 2 copies of data:
5362          * 1) unmodified from disk
5363          * 2) backup cache for save/restore during power-downs */
5364         priv->ucode_code.len = inst_size;
5365         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5366
5367         priv->ucode_data.len = data_size;
5368         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5369
5370         priv->ucode_data_backup.len = data_size;
5371         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5372
5373         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
5374             !priv->ucode_data_backup.v_addr)
5375                 goto err_pci_alloc;
5376
5377         /* Initialization instructions and data */
5378         if (init_size && init_data_size) {
5379                 priv->ucode_init.len = init_size;
5380                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5381
5382                 priv->ucode_init_data.len = init_data_size;
5383                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5384
5385                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5386                         goto err_pci_alloc;
5387         }
5388
5389         /* Bootstrap (instructions only, no data) */
5390         if (boot_size) {
5391                 priv->ucode_boot.len = boot_size;
5392                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5393
5394                 if (!priv->ucode_boot.v_addr)
5395                         goto err_pci_alloc;
5396         }
5397
5398         /* Copy images into buffers for card's bus-master reads ... */
5399
5400         /* Runtime instructions (first block of data in file) */
5401         src = &ucode->data[0];
5402         len = priv->ucode_code.len;
5403         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5404         memcpy(priv->ucode_code.v_addr, src, len);
5405         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5406                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5407
5408         /* Runtime data (2nd block)
5409          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
5410         src = &ucode->data[inst_size];
5411         len = priv->ucode_data.len;
5412         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5413         memcpy(priv->ucode_data.v_addr, src, len);
5414         memcpy(priv->ucode_data_backup.v_addr, src, len);
5415
5416         /* Initialization instructions (3rd block) */
5417         if (init_size) {
5418                 src = &ucode->data[inst_size + data_size];
5419                 len = priv->ucode_init.len;
5420                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5421                                len);
5422                 memcpy(priv->ucode_init.v_addr, src, len);
5423         }
5424
5425         /* Initialization data (4th block) */
5426         if (init_data_size) {
5427                 src = &ucode->data[inst_size + data_size + init_size];
5428                 len = priv->ucode_init_data.len;
5429                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
5430                                (int)len);
5431                 memcpy(priv->ucode_init_data.v_addr, src, len);
5432         }
5433
5434         /* Bootstrap instructions (5th block) */
5435         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5436         len = priv->ucode_boot.len;
5437         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
5438                        (int)len);
5439         memcpy(priv->ucode_boot.v_addr, src, len);
5440
5441         /* We have our copies now, allow OS release its copies */
5442         release_firmware(ucode_raw);
5443         return 0;
5444
5445  err_pci_alloc:
5446         IWL_ERROR("failed to allocate pci memory\n");
5447         ret = -ENOMEM;
5448         iwl3945_dealloc_ucode_pci(priv);
5449
5450  err_release:
5451         release_firmware(ucode_raw);
5452
5453  error:
5454         return ret;
5455 }
5456
5457
5458 /**
5459  * iwl3945_set_ucode_ptrs - Set uCode address location
5460  *
5461  * Tell initialization uCode where to find runtime uCode.
5462  *
5463  * BSM registers initially contain pointers to initialization uCode.
5464  * We need to replace them to load runtime uCode inst and data,
5465  * and to save runtime data when powering down.
5466  */
5467 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
5468 {
5469         dma_addr_t pinst;
5470         dma_addr_t pdata;
5471         int rc = 0;
5472         unsigned long flags;
5473
5474         /* bits 31:0 for 3945 */
5475         pinst = priv->ucode_code.p_addr;
5476         pdata = priv->ucode_data_backup.p_addr;
5477
5478         spin_lock_irqsave(&priv->lock, flags);
5479         rc = iwl_grab_nic_access(priv);
5480         if (rc) {
5481                 spin_unlock_irqrestore(&priv->lock, flags);
5482                 return rc;
5483         }
5484
5485         /* Tell bootstrap uCode where to find image to load */
5486         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5487         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5488         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5489                                  priv->ucode_data.len);
5490
5491         /* Inst byte count must be last to set up, bit 31 signals uCode
5492          *   that all new ptr/size info is in place */
5493         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5494                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5495
5496         iwl_release_nic_access(priv);
5497
5498         spin_unlock_irqrestore(&priv->lock, flags);
5499
5500         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5501
5502         return rc;
5503 }
5504
5505 /**
5506  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
5507  *
5508  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5509  *
5510  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5511  */
5512 static void iwl3945_init_alive_start(struct iwl_priv *priv)
5513 {
5514         /* Check alive response for "valid" sign from uCode */
5515         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5516                 /* We had an error bringing up the hardware, so take it
5517                  * all the way back down so we can try again */
5518                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5519                 goto restart;
5520         }
5521
5522         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5523          * This is a paranoid check, because we would not have gotten the
5524          * "initialize" alive if code weren't properly loaded.  */
5525         if (iwl3945_verify_ucode(priv)) {
5526                 /* Runtime instruction load was bad;
5527                  * take it all the way back down so we can try again */
5528                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5529                 goto restart;
5530         }
5531
5532         /* Send pointers to protocol/runtime uCode image ... init code will
5533          * load and launch runtime uCode, which will send us another "Alive"
5534          * notification. */
5535         IWL_DEBUG_INFO("Initialization Alive received.\n");
5536         if (iwl3945_set_ucode_ptrs(priv)) {
5537                 /* Runtime instruction load won't happen;
5538                  * take it all the way back down so we can try again */
5539                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5540                 goto restart;
5541         }
5542         return;
5543
5544  restart:
5545         queue_work(priv->workqueue, &priv->restart);
5546 }
5547
5548
5549 /* temporary */
5550 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw,
5551                                      struct sk_buff *skb);
5552
5553 /**
5554  * iwl3945_alive_start - called after REPLY_ALIVE notification received
5555  *                   from protocol/runtime uCode (initialization uCode's
5556  *                   Alive gets handled by iwl3945_init_alive_start()).
5557  */
5558 static void iwl3945_alive_start(struct iwl_priv *priv)
5559 {
5560         int rc = 0;
5561         int thermal_spin = 0;
5562         u32 rfkill;
5563
5564         IWL_DEBUG_INFO("Runtime Alive received.\n");
5565
5566         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5567                 /* We had an error bringing up the hardware, so take it
5568                  * all the way back down so we can try again */
5569                 IWL_DEBUG_INFO("Alive failed.\n");
5570                 goto restart;
5571         }
5572
5573         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5574          * This is a paranoid check, because we would not have gotten the
5575          * "runtime" alive if code weren't properly loaded.  */
5576         if (iwl3945_verify_ucode(priv)) {
5577                 /* Runtime instruction load was bad;
5578                  * take it all the way back down so we can try again */
5579                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5580                 goto restart;
5581         }
5582
5583         iwl3945_clear_stations_table(priv);
5584
5585         rc = iwl_grab_nic_access(priv);
5586         if (rc) {
5587                 IWL_WARN(priv, "Can not read RFKILL status from adapter\n");
5588                 return;
5589         }
5590
5591         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
5592         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
5593         iwl_release_nic_access(priv);
5594
5595         if (rfkill & 0x1) {
5596                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5597                 /* if RFKILL is not on, then wait for thermal
5598                  * sensor in adapter to kick in */
5599                 while (iwl3945_hw_get_temperature(priv) == 0) {
5600                         thermal_spin++;
5601                         udelay(10);
5602                 }
5603
5604                 if (thermal_spin)
5605                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
5606                                        thermal_spin * 10);
5607         } else
5608                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5609
5610         /* After the ALIVE response, we can send commands to 3945 uCode */
5611         set_bit(STATUS_ALIVE, &priv->status);
5612
5613         /* Clear out the uCode error bit if it is set */
5614         clear_bit(STATUS_FW_ERROR, &priv->status);
5615
5616         if (iwl3945_is_rfkill(priv))
5617                 return;
5618
5619         ieee80211_wake_queues(priv->hw);
5620
5621         priv->active_rate = priv->rates_mask;
5622         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5623
5624         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5625
5626         if (iwl3945_is_associated(priv)) {
5627                 struct iwl3945_rxon_cmd *active_rxon =
5628                                 (struct iwl3945_rxon_cmd *)(&priv->active39_rxon);
5629
5630                 memcpy(&priv->staging39_rxon, &priv->active39_rxon,
5631                        sizeof(priv->staging39_rxon));
5632                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5633         } else {
5634                 /* Initialize our rx_config data */
5635                 iwl3945_connection_init_rx_config(priv, priv->iw_mode);
5636                 memcpy(priv->staging39_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5637         }
5638
5639         /* Configure Bluetooth device coexistence support */
5640         iwl3945_send_bt_config(priv);
5641
5642         /* Configure the adapter for unassociated operation */
5643         iwl3945_commit_rxon(priv);
5644
5645         iwl3945_reg_txpower_periodic(priv);
5646
5647         iwl3945_led_register(priv);
5648
5649         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5650         set_bit(STATUS_READY, &priv->status);
5651         wake_up_interruptible(&priv->wait_command_queue);
5652
5653         if (priv->error_recovering)
5654                 iwl3945_error_recovery(priv);
5655
5656         /* reassociate for ADHOC mode */
5657         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
5658                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
5659                                                                 priv->vif);
5660                 if (beacon)
5661                         iwl3945_mac_beacon_update(priv->hw, beacon);
5662         }
5663
5664         return;
5665
5666  restart:
5667         queue_work(priv->workqueue, &priv->restart);
5668 }
5669
5670 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
5671
5672 static void __iwl3945_down(struct iwl_priv *priv)
5673 {
5674         unsigned long flags;
5675         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5676         struct ieee80211_conf *conf = NULL;
5677
5678         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5679
5680         conf = ieee80211_get_hw_conf(priv->hw);
5681
5682         if (!exit_pending)
5683                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5684
5685         iwl3945_led_unregister(priv);
5686         iwl3945_clear_stations_table(priv);
5687
5688         /* Unblock any waiting calls */
5689         wake_up_interruptible_all(&priv->wait_command_queue);
5690
5691         /* Wipe out the EXIT_PENDING status bit if we are not actually
5692          * exiting the module */
5693         if (!exit_pending)
5694                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5695
5696         /* stop and reset the on-board processor */
5697         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5698
5699         /* tell the device to stop sending interrupts */
5700         spin_lock_irqsave(&priv->lock, flags);
5701         iwl3945_disable_interrupts(priv);
5702         spin_unlock_irqrestore(&priv->lock, flags);
5703         iwl_synchronize_irq(priv);
5704
5705         if (priv->mac80211_registered)
5706                 ieee80211_stop_queues(priv->hw);
5707
5708         /* If we have not previously called iwl3945_init() then
5709          * clear all bits but the RF Kill and SUSPEND bits and return */
5710         if (!iwl3945_is_init(priv)) {
5711                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5712                                         STATUS_RF_KILL_HW |
5713                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5714                                         STATUS_RF_KILL_SW |
5715                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5716                                         STATUS_GEO_CONFIGURED |
5717                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5718                                         STATUS_IN_SUSPEND |
5719                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5720                                         STATUS_EXIT_PENDING;
5721                 goto exit;
5722         }
5723
5724         /* ...otherwise clear out all the status bits but the RF Kill and
5725          * SUSPEND bits and continue taking the NIC down. */
5726         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5727                                 STATUS_RF_KILL_HW |
5728                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5729                                 STATUS_RF_KILL_SW |
5730                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5731                                 STATUS_GEO_CONFIGURED |
5732                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5733                                 STATUS_IN_SUSPEND |
5734                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5735                                 STATUS_FW_ERROR |
5736                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
5737                                 STATUS_EXIT_PENDING;
5738
5739         spin_lock_irqsave(&priv->lock, flags);
5740         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5741         spin_unlock_irqrestore(&priv->lock, flags);
5742
5743         iwl3945_hw_txq_ctx_stop(priv);
5744         iwl3945_hw_rxq_stop(priv);
5745
5746         spin_lock_irqsave(&priv->lock, flags);
5747         if (!iwl_grab_nic_access(priv)) {
5748                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5749                                          APMG_CLK_VAL_DMA_CLK_RQT);
5750                 iwl_release_nic_access(priv);
5751         }
5752         spin_unlock_irqrestore(&priv->lock, flags);
5753
5754         udelay(5);
5755
5756         iwl3945_hw_nic_stop_master(priv);
5757         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5758         iwl3945_hw_nic_reset(priv);
5759
5760  exit:
5761         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
5762
5763         if (priv->ibss_beacon)
5764                 dev_kfree_skb(priv->ibss_beacon);
5765         priv->ibss_beacon = NULL;
5766
5767         /* clear out any free frames */
5768         iwl3945_clear_free_frames(priv);
5769 }
5770
5771 static void iwl3945_down(struct iwl_priv *priv)
5772 {
5773         mutex_lock(&priv->mutex);
5774         __iwl3945_down(priv);
5775         mutex_unlock(&priv->mutex);
5776
5777         iwl3945_cancel_deferred_work(priv);
5778 }
5779
5780 #define MAX_HW_RESTARTS 5
5781
5782 static int __iwl3945_up(struct iwl_priv *priv)
5783 {
5784         int rc, i;
5785
5786         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5787                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
5788                 return -EIO;
5789         }
5790
5791         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5792                 IWL_WARN(priv, "Radio disabled by SW RF kill (module "
5793                             "parameter)\n");
5794                 return -ENODEV;
5795         }
5796
5797         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5798                 IWL_ERROR("ucode not available for device bring up\n");
5799                 return -EIO;
5800         }
5801
5802         /* If platform's RF_KILL switch is NOT set to KILL */
5803         if (iwl_read32(priv, CSR_GP_CNTRL) &
5804                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5805                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5806         else {
5807                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5808                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5809                         IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
5810                         return -ENODEV;
5811                 }
5812         }
5813
5814         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5815
5816         rc = iwl3945_hw_nic_init(priv);
5817         if (rc) {
5818                 IWL_ERROR("Unable to int nic\n");
5819                 return rc;
5820         }
5821
5822         /* make sure rfkill handshake bits are cleared */
5823         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5824         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5825                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5826
5827         /* clear (again), then enable host interrupts */
5828         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5829         iwl3945_enable_interrupts(priv);
5830
5831         /* really make sure rfkill handshake bits are cleared */
5832         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5833         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5834
5835         /* Copy original ucode data image from disk into backup cache.
5836          * This will be used to initialize the on-board processor's
5837          * data SRAM for a clean start when the runtime program first loads. */
5838         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5839                priv->ucode_data.len);
5840
5841         /* We return success when we resume from suspend and rf_kill is on. */
5842         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5843                 return 0;
5844
5845         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5846
5847                 iwl3945_clear_stations_table(priv);
5848
5849                 /* load bootstrap state machine,
5850                  * load bootstrap program into processor's memory,
5851                  * prepare to load the "initialize" uCode */
5852                 rc = iwl3945_load_bsm(priv);
5853
5854                 if (rc) {
5855                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
5856                         continue;
5857                 }
5858
5859                 /* start card; "initialize" will load runtime ucode */
5860                 iwl3945_nic_start(priv);
5861
5862                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5863
5864                 return 0;
5865         }
5866
5867         set_bit(STATUS_EXIT_PENDING, &priv->status);
5868         __iwl3945_down(priv);
5869         clear_bit(STATUS_EXIT_PENDING, &priv->status);
5870
5871         /* tried to restart and config the device for as long as our
5872          * patience could withstand */
5873         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5874         return -EIO;
5875 }
5876
5877
5878 /*****************************************************************************
5879  *
5880  * Workqueue callbacks
5881  *
5882  *****************************************************************************/
5883
5884 static void iwl3945_bg_init_alive_start(struct work_struct *data)
5885 {
5886         struct iwl_priv *priv =
5887             container_of(data, struct iwl_priv, init_alive_start.work);
5888
5889         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5890                 return;
5891
5892         mutex_lock(&priv->mutex);
5893         iwl3945_init_alive_start(priv);
5894         mutex_unlock(&priv->mutex);
5895 }
5896
5897 static void iwl3945_bg_alive_start(struct work_struct *data)
5898 {
5899         struct iwl_priv *priv =
5900             container_of(data, struct iwl_priv, alive_start.work);
5901
5902         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5903                 return;
5904
5905         mutex_lock(&priv->mutex);
5906         iwl3945_alive_start(priv);
5907         mutex_unlock(&priv->mutex);
5908 }
5909
5910 static void iwl3945_bg_rf_kill(struct work_struct *work)
5911 {
5912         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5913
5914         wake_up_interruptible(&priv->wait_command_queue);
5915
5916         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5917                 return;
5918
5919         mutex_lock(&priv->mutex);
5920
5921         if (!iwl3945_is_rfkill(priv)) {
5922                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5923                           "HW and/or SW RF Kill no longer active, restarting "
5924                           "device\n");
5925                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5926                         queue_work(priv->workqueue, &priv->restart);
5927         } else {
5928
5929                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5930                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5931                                           "disabled by SW switch\n");
5932                 else
5933                         IWL_WARN(priv, "Radio Frequency Kill Switch is On:\n"
5934                                     "Kill switch must be turned off for "
5935                                     "wireless networking to work.\n");
5936         }
5937
5938         mutex_unlock(&priv->mutex);
5939         iwl3945_rfkill_set_hw_state(priv);
5940 }
5941
5942 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5943
5944 static void iwl3945_bg_scan_check(struct work_struct *data)
5945 {
5946         struct iwl_priv *priv =
5947             container_of(data, struct iwl_priv, scan_check.work);
5948
5949         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5950                 return;
5951
5952         mutex_lock(&priv->mutex);
5953         if (test_bit(STATUS_SCANNING, &priv->status) ||
5954             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5955                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5956                           "Scan completion watchdog resetting adapter (%dms)\n",
5957                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5958
5959                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5960                         iwl3945_send_scan_abort(priv);
5961         }
5962         mutex_unlock(&priv->mutex);
5963 }
5964
5965 static void iwl3945_bg_request_scan(struct work_struct *data)
5966 {
5967         struct iwl_priv *priv =
5968             container_of(data, struct iwl_priv, request_scan);
5969         struct iwl3945_host_cmd cmd = {
5970                 .id = REPLY_SCAN_CMD,
5971                 .len = sizeof(struct iwl3945_scan_cmd),
5972                 .meta.flags = CMD_SIZE_HUGE,
5973         };
5974         int rc = 0;
5975         struct iwl3945_scan_cmd *scan;
5976         struct ieee80211_conf *conf = NULL;
5977         u8 n_probes = 2;
5978         enum ieee80211_band band;
5979         DECLARE_SSID_BUF(ssid);
5980
5981         conf = ieee80211_get_hw_conf(priv->hw);
5982
5983         mutex_lock(&priv->mutex);
5984
5985         if (!iwl3945_is_ready(priv)) {
5986                 IWL_WARN(priv, "request scan called when driver not ready.\n");
5987                 goto done;
5988         }
5989
5990         /* Make sure the scan wasn't canceled before this queued work
5991          * was given the chance to run... */
5992         if (!test_bit(STATUS_SCANNING, &priv->status))
5993                 goto done;
5994
5995         /* This should never be called or scheduled if there is currently
5996          * a scan active in the hardware. */
5997         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5998                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5999                                "Ignoring second request.\n");
6000                 rc = -EIO;
6001                 goto done;
6002         }
6003
6004         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6005                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6006                 goto done;
6007         }
6008
6009         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6010                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6011                 goto done;
6012         }
6013
6014         if (iwl3945_is_rfkill(priv)) {
6015                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6016                 goto done;
6017         }
6018
6019         if (!test_bit(STATUS_READY, &priv->status)) {
6020                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6021                 goto done;
6022         }
6023
6024         if (!priv->scan_bands) {
6025                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6026                 goto done;
6027         }
6028
6029         if (!priv->scan39) {
6030                 priv->scan39 = kmalloc(sizeof(struct iwl3945_scan_cmd) +
6031                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6032                 if (!priv->scan39) {
6033                         rc = -ENOMEM;
6034                         goto done;
6035                 }
6036         }
6037         scan = priv->scan39;
6038         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
6039
6040         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6041         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6042
6043         if (iwl3945_is_associated(priv)) {
6044                 u16 interval = 0;
6045                 u32 extra;
6046                 u32 suspend_time = 100;
6047                 u32 scan_suspend_time = 100;
6048                 unsigned long flags;
6049
6050                 IWL_DEBUG_INFO("Scanning while associated...\n");
6051
6052                 spin_lock_irqsave(&priv->lock, flags);
6053                 interval = priv->beacon_int;
6054                 spin_unlock_irqrestore(&priv->lock, flags);
6055
6056                 scan->suspend_time = 0;
6057                 scan->max_out_time = cpu_to_le32(200 * 1024);
6058                 if (!interval)
6059                         interval = suspend_time;
6060                 /*
6061                  * suspend time format:
6062                  *  0-19: beacon interval in usec (time before exec.)
6063                  * 20-23: 0
6064                  * 24-31: number of beacons (suspend between channels)
6065                  */
6066
6067                 extra = (suspend_time / interval) << 24;
6068                 scan_suspend_time = 0xFF0FFFFF &
6069                     (extra | ((suspend_time % interval) * 1024));
6070
6071                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6072                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6073                                scan_suspend_time, interval);
6074         }
6075
6076         /* We should add the ability for user to lock to PASSIVE ONLY */
6077         if (priv->one_direct_scan) {
6078                 IWL_DEBUG_SCAN
6079                     ("Kicking off one direct scan for '%s'\n",
6080                      print_ssid(ssid, priv->direct_ssid,
6081                                 priv->direct_ssid_len));
6082                 scan->direct_scan[0].id = WLAN_EID_SSID;
6083                 scan->direct_scan[0].len = priv->direct_ssid_len;
6084                 memcpy(scan->direct_scan[0].ssid,
6085                        priv->direct_ssid, priv->direct_ssid_len);
6086                 n_probes++;
6087         } else
6088                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
6089
6090         /* We don't build a direct scan probe request; the uCode will do
6091          * that based on the direct_mask added to each channel entry */
6092         scan->tx_cmd.len = cpu_to_le16(
6093                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6094                         IWL_MAX_SCAN_SIZE - sizeof(*scan)));
6095         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6096         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
6097         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6098
6099         /* flags + rate selection */
6100
6101         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
6102                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6103                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
6104                 scan->good_CRC_th = 0;
6105                 band = IEEE80211_BAND_2GHZ;
6106         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
6107                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
6108                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6109                 band = IEEE80211_BAND_5GHZ;
6110         } else {
6111                 IWL_WARN(priv, "Invalid scan band count\n");
6112                 goto done;
6113         }
6114
6115         /* select Rx antennas */
6116         scan->flags |= iwl3945_get_antenna_flags(priv);
6117
6118         if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
6119                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6120
6121         scan->channel_count =
6122                 iwl3945_get_channels_for_scan(priv, band, 1, /* active */
6123                                               n_probes,
6124                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6125
6126         if (scan->channel_count == 0) {
6127                 IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
6128                 goto done;
6129         }
6130
6131         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6132             scan->channel_count * sizeof(struct iwl3945_scan_channel);
6133         cmd.data = scan;
6134         scan->len = cpu_to_le16(cmd.len);
6135
6136         set_bit(STATUS_SCAN_HW, &priv->status);
6137         rc = iwl3945_send_cmd_sync(priv, &cmd);
6138         if (rc)
6139                 goto done;
6140
6141         queue_delayed_work(priv->workqueue, &priv->scan_check,
6142                            IWL_SCAN_CHECK_WATCHDOG);
6143
6144         mutex_unlock(&priv->mutex);
6145         return;
6146
6147  done:
6148         /* can not perform scan make sure we clear scanning
6149          * bits from status so next scan request can be performed.
6150          * if we dont clear scanning status bit here all next scan
6151          * will fail
6152         */
6153         clear_bit(STATUS_SCAN_HW, &priv->status);
6154         clear_bit(STATUS_SCANNING, &priv->status);
6155
6156         /* inform mac80211 scan aborted */
6157         queue_work(priv->workqueue, &priv->scan_completed);
6158         mutex_unlock(&priv->mutex);
6159 }
6160
6161 static void iwl3945_bg_up(struct work_struct *data)
6162 {
6163         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6164
6165         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6166                 return;
6167
6168         mutex_lock(&priv->mutex);
6169         __iwl3945_up(priv);
6170         mutex_unlock(&priv->mutex);
6171         iwl3945_rfkill_set_hw_state(priv);
6172 }
6173
6174 static void iwl3945_bg_restart(struct work_struct *data)
6175 {
6176         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6177
6178         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6179                 return;
6180
6181         iwl3945_down(priv);
6182         queue_work(priv->workqueue, &priv->up);
6183 }
6184
6185 static void iwl3945_bg_rx_replenish(struct work_struct *data)
6186 {
6187         struct iwl_priv *priv =
6188             container_of(data, struct iwl_priv, rx_replenish);
6189
6190         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6191                 return;
6192
6193         mutex_lock(&priv->mutex);
6194         iwl3945_rx_replenish(priv);
6195         mutex_unlock(&priv->mutex);
6196 }
6197
6198 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6199
6200 static void iwl3945_post_associate(struct iwl_priv *priv)
6201 {
6202         int rc = 0;
6203         struct ieee80211_conf *conf = NULL;
6204
6205         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6206                 IWL_ERROR("%s Should not be called in AP mode\n", __func__);
6207                 return;
6208         }
6209
6210
6211         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
6212                         priv->assoc_id, priv->active39_rxon.bssid_addr);
6213
6214         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6215                 return;
6216
6217         if (!priv->vif || !priv->is_open)
6218                 return;
6219
6220         iwl3945_scan_cancel_timeout(priv, 200);
6221
6222         conf = ieee80211_get_hw_conf(priv->hw);
6223
6224         priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6225         iwl3945_commit_rxon(priv);
6226
6227         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
6228         iwl3945_setup_rxon_timing(priv);
6229         rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6230                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6231         if (rc)
6232                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
6233                             "Attempting to continue.\n");
6234
6235         priv->staging39_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6236
6237         priv->staging39_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6238
6239         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6240                         priv->assoc_id, priv->beacon_int);
6241
6242         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6243                 priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6244         else
6245                 priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6246
6247         if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6248                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6249                         priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6250                 else
6251                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6252
6253                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6254                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6255
6256         }
6257
6258         iwl3945_commit_rxon(priv);
6259
6260         switch (priv->iw_mode) {
6261         case NL80211_IFTYPE_STATION:
6262                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
6263                 break;
6264
6265         case NL80211_IFTYPE_ADHOC:
6266
6267                 priv->assoc_id = 1;
6268                 iwl3945_add_station(priv, priv->bssid, 0, 0);
6269                 iwl3945_sync_sta(priv, IWL_STA_ID,
6270                                  (priv->band == IEEE80211_BAND_5GHZ) ?
6271                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
6272                                  CMD_ASYNC);
6273                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
6274                 iwl3945_send_beacon_cmd(priv);
6275
6276                 break;
6277
6278         default:
6279                  IWL_ERROR("%s Should not be called in %d mode\n",
6280                            __func__, priv->iw_mode);
6281                 break;
6282         }
6283
6284         iwl3945_activate_qos(priv, 0);
6285
6286         /* we have just associated, don't start scan too early */
6287         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6288 }
6289
6290 static void iwl3945_bg_abort_scan(struct work_struct *work)
6291 {
6292         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
6293
6294         if (!iwl3945_is_ready(priv))
6295                 return;
6296
6297         mutex_lock(&priv->mutex);
6298
6299         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6300         iwl3945_send_scan_abort(priv);
6301
6302         mutex_unlock(&priv->mutex);
6303 }
6304
6305 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed);
6306
6307 static void iwl3945_bg_scan_completed(struct work_struct *work)
6308 {
6309         struct iwl_priv *priv =
6310             container_of(work, struct iwl_priv, scan_completed);
6311
6312         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6313
6314         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6315                 return;
6316
6317         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6318                 iwl3945_mac_config(priv->hw, 0);
6319
6320         ieee80211_scan_completed(priv->hw);
6321
6322         /* Since setting the TXPOWER may have been deferred while
6323          * performing the scan, fire one off */
6324         mutex_lock(&priv->mutex);
6325         iwl3945_hw_reg_send_txpower(priv);
6326         mutex_unlock(&priv->mutex);
6327 }
6328
6329 /*****************************************************************************
6330  *
6331  * mac80211 entry point functions
6332  *
6333  *****************************************************************************/
6334
6335 #define UCODE_READY_TIMEOUT     (2 * HZ)
6336
6337 static int iwl3945_mac_start(struct ieee80211_hw *hw)
6338 {
6339         struct iwl_priv *priv = hw->priv;
6340         int ret;
6341
6342         IWL_DEBUG_MAC80211("enter\n");
6343
6344         if (pci_enable_device(priv->pci_dev)) {
6345                 IWL_ERROR("Fail to pci_enable_device\n");
6346                 return -ENODEV;
6347         }
6348         pci_restore_state(priv->pci_dev);
6349         pci_enable_msi(priv->pci_dev);
6350
6351         ret = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
6352                           DRV_NAME, priv);
6353         if (ret) {
6354                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6355                 goto out_disable_msi;
6356         }
6357
6358         /* we should be verifying the device is ready to be opened */
6359         mutex_lock(&priv->mutex);
6360
6361         memset(&priv->staging39_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
6362         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6363          * ucode filename and max sizes are card-specific. */
6364
6365         if (!priv->ucode_code.len) {
6366                 ret = iwl3945_read_ucode(priv);
6367                 if (ret) {
6368                         IWL_ERROR("Could not read microcode: %d\n", ret);
6369                         mutex_unlock(&priv->mutex);
6370                         goto out_release_irq;
6371                 }
6372         }
6373
6374         ret = __iwl3945_up(priv);
6375
6376         mutex_unlock(&priv->mutex);
6377
6378         iwl3945_rfkill_set_hw_state(priv);
6379
6380         if (ret)
6381                 goto out_release_irq;
6382
6383         IWL_DEBUG_INFO("Start UP work.\n");
6384
6385         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6386                 return 0;
6387
6388         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6389          * mac80211 will not be run successfully. */
6390         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6391                         test_bit(STATUS_READY, &priv->status),
6392                         UCODE_READY_TIMEOUT);
6393         if (!ret) {
6394                 if (!test_bit(STATUS_READY, &priv->status)) {
6395                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6396                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6397                         ret = -ETIMEDOUT;
6398                         goto out_release_irq;
6399                 }
6400         }
6401
6402         priv->is_open = 1;
6403         IWL_DEBUG_MAC80211("leave\n");
6404         return 0;
6405
6406 out_release_irq:
6407         free_irq(priv->pci_dev->irq, priv);
6408 out_disable_msi:
6409         pci_disable_msi(priv->pci_dev);
6410         pci_disable_device(priv->pci_dev);
6411         priv->is_open = 0;
6412         IWL_DEBUG_MAC80211("leave - failed\n");
6413         return ret;
6414 }
6415
6416 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
6417 {
6418         struct iwl_priv *priv = hw->priv;
6419
6420         IWL_DEBUG_MAC80211("enter\n");
6421
6422         if (!priv->is_open) {
6423                 IWL_DEBUG_MAC80211("leave - skip\n");
6424                 return;
6425         }
6426
6427         priv->is_open = 0;
6428
6429         if (iwl3945_is_ready_rf(priv)) {
6430                 /* stop mac, cancel any scan request and clear
6431                  * RXON_FILTER_ASSOC_MSK BIT
6432                  */
6433                 mutex_lock(&priv->mutex);
6434                 iwl3945_scan_cancel_timeout(priv, 100);
6435                 mutex_unlock(&priv->mutex);
6436         }
6437
6438         iwl3945_down(priv);
6439
6440         flush_workqueue(priv->workqueue);
6441         free_irq(priv->pci_dev->irq, priv);
6442         pci_disable_msi(priv->pci_dev);
6443         pci_save_state(priv->pci_dev);
6444         pci_disable_device(priv->pci_dev);
6445
6446         IWL_DEBUG_MAC80211("leave\n");
6447 }
6448
6449 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
6450 {
6451         struct iwl_priv *priv = hw->priv;
6452
6453         IWL_DEBUG_MAC80211("enter\n");
6454
6455         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6456                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
6457
6458         if (iwl3945_tx_skb(priv, skb))
6459                 dev_kfree_skb_any(skb);
6460
6461         IWL_DEBUG_MAC80211("leave\n");
6462         return NETDEV_TX_OK;
6463 }
6464
6465 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
6466                                  struct ieee80211_if_init_conf *conf)
6467 {
6468         struct iwl_priv *priv = hw->priv;
6469         unsigned long flags;
6470
6471         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6472
6473         if (priv->vif) {
6474                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6475                 return -EOPNOTSUPP;
6476         }
6477
6478         spin_lock_irqsave(&priv->lock, flags);
6479         priv->vif = conf->vif;
6480         priv->iw_mode = conf->type;
6481
6482         spin_unlock_irqrestore(&priv->lock, flags);
6483
6484         mutex_lock(&priv->mutex);
6485
6486         if (conf->mac_addr) {
6487                 IWL_DEBUG_MAC80211("Set: %pM\n", conf->mac_addr);
6488                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6489         }
6490
6491         if (iwl3945_is_ready(priv))
6492                 iwl3945_set_mode(priv, conf->type);
6493
6494         mutex_unlock(&priv->mutex);
6495
6496         IWL_DEBUG_MAC80211("leave\n");
6497         return 0;
6498 }
6499
6500 /**
6501  * iwl3945_mac_config - mac80211 config callback
6502  *
6503  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6504  * be set inappropriately and the driver currently sets the hardware up to
6505  * use it whenever needed.
6506  */
6507 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
6508 {
6509         struct iwl_priv *priv = hw->priv;
6510         const struct iwl_channel_info *ch_info;
6511         struct ieee80211_conf *conf = &hw->conf;
6512         unsigned long flags;
6513         int ret = 0;
6514
6515         mutex_lock(&priv->mutex);
6516         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6517
6518         if (!iwl3945_is_ready(priv)) {
6519                 IWL_DEBUG_MAC80211("leave - not ready\n");
6520                 ret = -EIO;
6521                 goto out;
6522         }
6523
6524         if (unlikely(!iwl3945_param_disable_hw_scan &&
6525                      test_bit(STATUS_SCANNING, &priv->status))) {
6526                 IWL_DEBUG_MAC80211("leave - scanning\n");
6527                 set_bit(STATUS_CONF_PENDING, &priv->status);
6528                 mutex_unlock(&priv->mutex);
6529                 return 0;
6530         }
6531
6532         spin_lock_irqsave(&priv->lock, flags);
6533
6534         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
6535                                            conf->channel->hw_value);
6536         if (!is_channel_valid(ch_info)) {
6537                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
6538                                conf->channel->hw_value, conf->channel->band);
6539                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6540                 spin_unlock_irqrestore(&priv->lock, flags);
6541                 ret = -EINVAL;
6542                 goto out;
6543         }
6544
6545         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
6546
6547         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
6548
6549         /* The list of supported rates and rate mask can be different
6550          * for each phymode; since the phymode may have changed, reset
6551          * the rate mask to what mac80211 lists */
6552         iwl3945_set_rate(priv);
6553
6554         spin_unlock_irqrestore(&priv->lock, flags);
6555
6556 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6557         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6558                 iwl3945_hw_channel_switch(priv, conf->channel);
6559                 goto out;
6560         }
6561 #endif
6562
6563         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
6564
6565         if (!conf->radio_enabled) {
6566                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6567                 goto out;
6568         }
6569
6570         if (iwl3945_is_rfkill(priv)) {
6571                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6572                 ret = -EIO;
6573                 goto out;
6574         }
6575
6576         iwl3945_set_rate(priv);
6577
6578         if (memcmp(&priv->active39_rxon,
6579                    &priv->staging39_rxon, sizeof(priv->staging39_rxon)))
6580                 iwl3945_commit_rxon(priv);
6581         else
6582                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6583
6584         IWL_DEBUG_MAC80211("leave\n");
6585
6586 out:
6587         clear_bit(STATUS_CONF_PENDING, &priv->status);
6588         mutex_unlock(&priv->mutex);
6589         return ret;
6590 }
6591
6592 static void iwl3945_config_ap(struct iwl_priv *priv)
6593 {
6594         int rc = 0;
6595
6596         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6597                 return;
6598
6599         /* The following should be done only at AP bring up */
6600         if (!(iwl3945_is_associated(priv))) {
6601
6602                 /* RXON - unassoc (to set timing command) */
6603                 priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6604                 iwl3945_commit_rxon(priv);
6605
6606                 /* RXON Timing */
6607                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
6608                 iwl3945_setup_rxon_timing(priv);
6609                 rc = iwl3945_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6610                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6611                 if (rc)
6612                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
6613                                         "Attempting to continue.\n");
6614
6615                 /* FIXME: what should be the assoc_id for AP? */
6616                 priv->staging39_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6617                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6618                         priv->staging39_rxon.flags |=
6619                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6620                 else
6621                         priv->staging39_rxon.flags &=
6622                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6623
6624                 if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6625                         if (priv->assoc_capability &
6626                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6627                                 priv->staging39_rxon.flags |=
6628                                         RXON_FLG_SHORT_SLOT_MSK;
6629                         else
6630                                 priv->staging39_rxon.flags &=
6631                                         ~RXON_FLG_SHORT_SLOT_MSK;
6632
6633                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
6634                                 priv->staging39_rxon.flags &=
6635                                         ~RXON_FLG_SHORT_SLOT_MSK;
6636                 }
6637                 /* restore RXON assoc */
6638                 priv->staging39_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6639                 iwl3945_commit_rxon(priv);
6640                 iwl3945_add_station(priv, iwl_bcast_addr, 0, 0);
6641         }
6642         iwl3945_send_beacon_cmd(priv);
6643
6644         /* FIXME - we need to add code here to detect a totally new
6645          * configuration, reset the AP, unassoc, rxon timing, assoc,
6646          * clear sta table, add BCAST sta... */
6647 }
6648
6649 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
6650                                         struct ieee80211_vif *vif,
6651                                         struct ieee80211_if_conf *conf)
6652 {
6653         struct iwl_priv *priv = hw->priv;
6654         int rc;
6655
6656         if (conf == NULL)
6657                 return -EIO;
6658
6659         if (priv->vif != vif) {
6660                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6661                 return 0;
6662         }
6663
6664         /* handle this temporarily here */
6665         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
6666             conf->changed & IEEE80211_IFCC_BEACON) {
6667                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
6668                 if (!beacon)
6669                         return -ENOMEM;
6670                 mutex_lock(&priv->mutex);
6671                 rc = iwl3945_mac_beacon_update(hw, beacon);
6672                 mutex_unlock(&priv->mutex);
6673                 if (rc)
6674                         return rc;
6675         }
6676
6677         if (!iwl3945_is_alive(priv))
6678                 return -EAGAIN;
6679
6680         mutex_lock(&priv->mutex);
6681
6682         if (conf->bssid)
6683                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
6684
6685 /*
6686  * very dubious code was here; the probe filtering flag is never set:
6687  *
6688         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6689             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6690  */
6691
6692         if (priv->iw_mode == NL80211_IFTYPE_AP) {
6693                 if (!conf->bssid) {
6694                         conf->bssid = priv->mac_addr;
6695                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6696                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
6697                                            conf->bssid);
6698                 }
6699                 if (priv->ibss_beacon)
6700                         dev_kfree_skb(priv->ibss_beacon);
6701
6702                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
6703         }
6704
6705         if (iwl3945_is_rfkill(priv))
6706                 goto done;
6707
6708         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6709             !is_multicast_ether_addr(conf->bssid)) {
6710                 /* If there is currently a HW scan going on in the background
6711                  * then we need to cancel it else the RXON below will fail. */
6712                 if (iwl3945_scan_cancel_timeout(priv, 100)) {
6713                         IWL_WARN(priv, "Aborted scan still in progress "
6714                                     "after 100ms\n");
6715                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6716                         mutex_unlock(&priv->mutex);
6717                         return -EAGAIN;
6718                 }
6719                 memcpy(priv->staging39_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6720
6721                 /* TODO: Audit driver for usage of these members and see
6722                  * if mac80211 deprecates them (priv->bssid looks like it
6723                  * shouldn't be there, but I haven't scanned the IBSS code
6724                  * to verify) - jpk */
6725                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6726
6727                 if (priv->iw_mode == NL80211_IFTYPE_AP)
6728                         iwl3945_config_ap(priv);
6729                 else {
6730                         rc = iwl3945_commit_rxon(priv);
6731                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
6732                                 iwl3945_add_station(priv,
6733                                         priv->active39_rxon.bssid_addr, 1, 0);
6734                 }
6735
6736         } else {
6737                 iwl3945_scan_cancel_timeout(priv, 100);
6738                 priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6739                 iwl3945_commit_rxon(priv);
6740         }
6741
6742  done:
6743         IWL_DEBUG_MAC80211("leave\n");
6744         mutex_unlock(&priv->mutex);
6745
6746         return 0;
6747 }
6748
6749 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
6750                                  unsigned int changed_flags,
6751                                  unsigned int *total_flags,
6752                                  int mc_count, struct dev_addr_list *mc_list)
6753 {
6754         struct iwl_priv *priv = hw->priv;
6755         __le32 *filter_flags = &priv->staging39_rxon.filter_flags;
6756
6757         IWL_DEBUG_MAC80211("Enter: changed: 0x%x, total: 0x%x\n",
6758                         changed_flags, *total_flags);
6759
6760         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
6761                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
6762                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
6763                 else
6764                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
6765         }
6766         if (changed_flags & FIF_ALLMULTI) {
6767                 if (*total_flags & FIF_ALLMULTI)
6768                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
6769                 else
6770                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
6771         }
6772         if (changed_flags & FIF_CONTROL) {
6773                 if (*total_flags & FIF_CONTROL)
6774                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
6775                 else
6776                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
6777         }
6778         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
6779                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
6780                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
6781                 else
6782                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
6783         }
6784
6785         /* We avoid iwl_commit_rxon here to commit the new filter flags
6786          * since mac80211 will call ieee80211_hw_config immediately.
6787          * (mc_list is not supported at this time). Otherwise, we need to
6788          * queue a background iwl_commit_rxon work.
6789          */
6790
6791         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
6792                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
6793 }
6794
6795 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
6796                                      struct ieee80211_if_init_conf *conf)
6797 {
6798         struct iwl_priv *priv = hw->priv;
6799
6800         IWL_DEBUG_MAC80211("enter\n");
6801
6802         mutex_lock(&priv->mutex);
6803
6804         if (iwl3945_is_ready_rf(priv)) {
6805                 iwl3945_scan_cancel_timeout(priv, 100);
6806                 priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6807                 iwl3945_commit_rxon(priv);
6808         }
6809         if (priv->vif == conf->vif) {
6810                 priv->vif = NULL;
6811                 memset(priv->bssid, 0, ETH_ALEN);
6812         }
6813         mutex_unlock(&priv->mutex);
6814
6815         IWL_DEBUG_MAC80211("leave\n");
6816 }
6817
6818 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6819
6820 static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
6821                                      struct ieee80211_vif *vif,
6822                                      struct ieee80211_bss_conf *bss_conf,
6823                                      u32 changes)
6824 {
6825         struct iwl_priv *priv = hw->priv;
6826
6827         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6828
6829         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6830                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6831                                    bss_conf->use_short_preamble);
6832                 if (bss_conf->use_short_preamble)
6833                         priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6834                 else
6835                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6836         }
6837
6838         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6839                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6840                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6841                         priv->staging39_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6842                 else
6843                         priv->staging39_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6844         }
6845
6846         if (changes & BSS_CHANGED_ASSOC) {
6847                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6848                 /* This should never happen as this function should
6849                  * never be called from interrupt context. */
6850                 if (WARN_ON_ONCE(in_interrupt()))
6851                         return;
6852                 if (bss_conf->assoc) {
6853                         priv->assoc_id = bss_conf->aid;
6854                         priv->beacon_int = bss_conf->beacon_int;
6855                         priv->timestamp = bss_conf->timestamp;
6856                         priv->assoc_capability = bss_conf->assoc_capability;
6857                         priv->next_scan_jiffies = jiffies +
6858                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6859                         mutex_lock(&priv->mutex);
6860                         iwl3945_post_associate(priv);
6861                         mutex_unlock(&priv->mutex);
6862                 } else {
6863                         priv->assoc_id = 0;
6864                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6865                 }
6866         } else if (changes && iwl3945_is_associated(priv) && priv->assoc_id) {
6867                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6868                         iwl3945_send_rxon_assoc(priv);
6869         }
6870
6871 }
6872
6873 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6874 {
6875         int rc = 0;
6876         unsigned long flags;
6877         struct iwl_priv *priv = hw->priv;
6878         DECLARE_SSID_BUF(ssid_buf);
6879
6880         IWL_DEBUG_MAC80211("enter\n");
6881
6882         mutex_lock(&priv->mutex);
6883         spin_lock_irqsave(&priv->lock, flags);
6884
6885         if (!iwl3945_is_ready_rf(priv)) {
6886                 rc = -EIO;
6887                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6888                 goto out_unlock;
6889         }
6890
6891         /* we don't schedule scan within next_scan_jiffies period */
6892         if (priv->next_scan_jiffies &&
6893                         time_after(priv->next_scan_jiffies, jiffies)) {
6894                 rc = -EAGAIN;
6895                 goto out_unlock;
6896         }
6897         /* if we just finished scan ask for delay for a broadcast scan */
6898         if ((len == 0) && priv->last_scan_jiffies &&
6899             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
6900                        jiffies)) {
6901                 rc = -EAGAIN;
6902                 goto out_unlock;
6903         }
6904         if (len) {
6905                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6906                                print_ssid(ssid_buf, ssid, len), (int)len);
6907
6908                 priv->one_direct_scan = 1;
6909                 priv->direct_ssid_len = (u8)
6910                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6911                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6912         } else
6913                 priv->one_direct_scan = 0;
6914
6915         rc = iwl3945_scan_initiate(priv);
6916
6917         IWL_DEBUG_MAC80211("leave\n");
6918
6919 out_unlock:
6920         spin_unlock_irqrestore(&priv->lock, flags);
6921         mutex_unlock(&priv->mutex);
6922
6923         return rc;
6924 }
6925
6926 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6927                            const u8 *local_addr, const u8 *addr,
6928                            struct ieee80211_key_conf *key)
6929 {
6930         struct iwl_priv *priv = hw->priv;
6931         int rc = 0;
6932         u8 sta_id;
6933
6934         IWL_DEBUG_MAC80211("enter\n");
6935
6936         if (!iwl3945_param_hwcrypto) {
6937                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6938                 return -EOPNOTSUPP;
6939         }
6940
6941         if (is_zero_ether_addr(addr))
6942                 /* only support pairwise keys */
6943                 return -EOPNOTSUPP;
6944
6945         sta_id = iwl3945_hw_find_station(priv, addr);
6946         if (sta_id == IWL_INVALID_STATION) {
6947                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
6948                                    addr);
6949                 return -EINVAL;
6950         }
6951
6952         mutex_lock(&priv->mutex);
6953
6954         iwl3945_scan_cancel_timeout(priv, 100);
6955
6956         switch (cmd) {
6957         case  SET_KEY:
6958                 rc = iwl3945_update_sta_key_info(priv, key, sta_id);
6959                 if (!rc) {
6960                         iwl3945_set_rxon_hwcrypto(priv, 1);
6961                         iwl3945_commit_rxon(priv);
6962                         key->hw_key_idx = sta_id;
6963                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
6964                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
6965                 }
6966                 break;
6967         case DISABLE_KEY:
6968                 rc = iwl3945_clear_sta_key_info(priv, sta_id);
6969                 if (!rc) {
6970                         iwl3945_set_rxon_hwcrypto(priv, 0);
6971                         iwl3945_commit_rxon(priv);
6972                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6973                 }
6974                 break;
6975         default:
6976                 rc = -EINVAL;
6977         }
6978
6979         IWL_DEBUG_MAC80211("leave\n");
6980         mutex_unlock(&priv->mutex);
6981
6982         return rc;
6983 }
6984
6985 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
6986                            const struct ieee80211_tx_queue_params *params)
6987 {
6988         struct iwl_priv *priv = hw->priv;
6989         unsigned long flags;
6990         int q;
6991
6992         IWL_DEBUG_MAC80211("enter\n");
6993
6994         if (!iwl3945_is_ready_rf(priv)) {
6995                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6996                 return -EIO;
6997         }
6998
6999         if (queue >= AC_NUM) {
7000                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7001                 return 0;
7002         }
7003
7004         q = AC_NUM - 1 - queue;
7005
7006         spin_lock_irqsave(&priv->lock, flags);
7007
7008         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7009         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7010         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7011         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7012                         cpu_to_le16((params->txop * 32));
7013
7014         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7015         priv->qos_data.qos_active = 1;
7016
7017         spin_unlock_irqrestore(&priv->lock, flags);
7018
7019         mutex_lock(&priv->mutex);
7020         if (priv->iw_mode == NL80211_IFTYPE_AP)
7021                 iwl3945_activate_qos(priv, 1);
7022         else if (priv->assoc_id && iwl3945_is_associated(priv))
7023                 iwl3945_activate_qos(priv, 0);
7024
7025         mutex_unlock(&priv->mutex);
7026
7027         IWL_DEBUG_MAC80211("leave\n");
7028         return 0;
7029 }
7030
7031 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
7032                                 struct ieee80211_tx_queue_stats *stats)
7033 {
7034         struct iwl_priv *priv = hw->priv;
7035         int i, avail;
7036         struct iwl3945_tx_queue *txq;
7037         struct iwl_queue *q;
7038         unsigned long flags;
7039
7040         IWL_DEBUG_MAC80211("enter\n");
7041
7042         if (!iwl3945_is_ready_rf(priv)) {
7043                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7044                 return -EIO;
7045         }
7046
7047         spin_lock_irqsave(&priv->lock, flags);
7048
7049         for (i = 0; i < AC_NUM; i++) {
7050                 txq = &priv->txq39[i];
7051                 q = &txq->q;
7052                 avail = iwl_queue_space(q);
7053
7054                 stats[i].len = q->n_window - avail;
7055                 stats[i].limit = q->n_window - q->high_mark;
7056                 stats[i].count = q->n_window;
7057
7058         }
7059         spin_unlock_irqrestore(&priv->lock, flags);
7060
7061         IWL_DEBUG_MAC80211("leave\n");
7062
7063         return 0;
7064 }
7065
7066 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
7067 {
7068         struct iwl_priv *priv = hw->priv;
7069         unsigned long flags;
7070
7071         mutex_lock(&priv->mutex);
7072         IWL_DEBUG_MAC80211("enter\n");
7073
7074         iwl3945_reset_qos(priv);
7075
7076         spin_lock_irqsave(&priv->lock, flags);
7077         priv->assoc_id = 0;
7078         priv->assoc_capability = 0;
7079         priv->call_post_assoc_from_beacon = 0;
7080
7081         /* new association get rid of ibss beacon skb */
7082         if (priv->ibss_beacon)
7083                 dev_kfree_skb(priv->ibss_beacon);
7084
7085         priv->ibss_beacon = NULL;
7086
7087         priv->beacon_int = priv->hw->conf.beacon_int;
7088         priv->timestamp = 0;
7089         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
7090                 priv->beacon_int = 0;
7091
7092         spin_unlock_irqrestore(&priv->lock, flags);
7093
7094         if (!iwl3945_is_ready_rf(priv)) {
7095                 IWL_DEBUG_MAC80211("leave - not ready\n");
7096                 mutex_unlock(&priv->mutex);
7097                 return;
7098         }
7099
7100         /* we are restarting association process
7101          * clear RXON_FILTER_ASSOC_MSK bit
7102         */
7103         if (priv->iw_mode != NL80211_IFTYPE_AP) {
7104                 iwl3945_scan_cancel_timeout(priv, 100);
7105                 priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7106                 iwl3945_commit_rxon(priv);
7107         }
7108
7109         /* Per mac80211.h: This is only used in IBSS mode... */
7110         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7111
7112                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7113                 mutex_unlock(&priv->mutex);
7114                 return;
7115         }
7116
7117         iwl3945_set_rate(priv);
7118
7119         mutex_unlock(&priv->mutex);
7120
7121         IWL_DEBUG_MAC80211("leave\n");
7122
7123 }
7124
7125 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
7126 {
7127         struct iwl_priv *priv = hw->priv;
7128         unsigned long flags;
7129
7130         IWL_DEBUG_MAC80211("enter\n");
7131
7132         if (!iwl3945_is_ready_rf(priv)) {
7133                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7134                 return -EIO;
7135         }
7136
7137         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
7138                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7139                 return -EIO;
7140         }
7141
7142         spin_lock_irqsave(&priv->lock, flags);
7143
7144         if (priv->ibss_beacon)
7145                 dev_kfree_skb(priv->ibss_beacon);
7146
7147         priv->ibss_beacon = skb;
7148
7149         priv->assoc_id = 0;
7150
7151         IWL_DEBUG_MAC80211("leave\n");
7152         spin_unlock_irqrestore(&priv->lock, flags);
7153
7154         iwl3945_reset_qos(priv);
7155
7156         iwl3945_post_associate(priv);
7157
7158
7159         return 0;
7160 }
7161
7162 /*****************************************************************************
7163  *
7164  * sysfs attributes
7165  *
7166  *****************************************************************************/
7167
7168 #ifdef CONFIG_IWL3945_DEBUG
7169
7170 /*
7171  * The following adds a new attribute to the sysfs representation
7172  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7173  * used for controlling the debug level.
7174  *
7175  * See the level definitions in iwl for details.
7176  */
7177 static ssize_t show_debug_level(struct device *d,
7178                                 struct device_attribute *attr, char *buf)
7179 {
7180         struct iwl_priv *priv = d->driver_data;
7181
7182         return sprintf(buf, "0x%08X\n", priv->debug_level);
7183 }
7184 static ssize_t store_debug_level(struct device *d,
7185                                 struct device_attribute *attr,
7186                                  const char *buf, size_t count)
7187 {
7188         struct iwl_priv *priv = d->driver_data;
7189         unsigned long val;
7190         int ret;
7191
7192         ret = strict_strtoul(buf, 0, &val);
7193         if (ret)
7194                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
7195         else
7196                 priv->debug_level = val;
7197
7198         return strnlen(buf, count);
7199 }
7200
7201 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
7202                         show_debug_level, store_debug_level);
7203
7204 #endif /* CONFIG_IWL3945_DEBUG */
7205
7206 static ssize_t show_temperature(struct device *d,
7207                                 struct device_attribute *attr, char *buf)
7208 {
7209         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7210
7211         if (!iwl3945_is_alive(priv))
7212                 return -EAGAIN;
7213
7214         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
7215 }
7216
7217 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7218
7219 static ssize_t show_tx_power(struct device *d,
7220                              struct device_attribute *attr, char *buf)
7221 {
7222         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7223         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7224 }
7225
7226 static ssize_t store_tx_power(struct device *d,
7227                               struct device_attribute *attr,
7228                               const char *buf, size_t count)
7229 {
7230         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7231         char *p = (char *)buf;
7232         u32 val;
7233
7234         val = simple_strtoul(p, &p, 10);
7235         if (p == buf)
7236                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
7237         else
7238                 iwl3945_hw_reg_set_txpower(priv, val);
7239
7240         return count;
7241 }
7242
7243 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7244
7245 static ssize_t show_flags(struct device *d,
7246                           struct device_attribute *attr, char *buf)
7247 {
7248         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7249
7250         return sprintf(buf, "0x%04X\n", priv->active39_rxon.flags);
7251 }
7252
7253 static ssize_t store_flags(struct device *d,
7254                            struct device_attribute *attr,
7255                            const char *buf, size_t count)
7256 {
7257         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7258         u32 flags = simple_strtoul(buf, NULL, 0);
7259
7260         mutex_lock(&priv->mutex);
7261         if (le32_to_cpu(priv->staging39_rxon.flags) != flags) {
7262                 /* Cancel any currently running scans... */
7263                 if (iwl3945_scan_cancel_timeout(priv, 100))
7264                         IWL_WARN(priv, "Could not cancel scan.\n");
7265                 else {
7266                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7267                                        flags);
7268                         priv->staging39_rxon.flags = cpu_to_le32(flags);
7269                         iwl3945_commit_rxon(priv);
7270                 }
7271         }
7272         mutex_unlock(&priv->mutex);
7273
7274         return count;
7275 }
7276
7277 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7278
7279 static ssize_t show_filter_flags(struct device *d,
7280                                  struct device_attribute *attr, char *buf)
7281 {
7282         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7283
7284         return sprintf(buf, "0x%04X\n",
7285                 le32_to_cpu(priv->active39_rxon.filter_flags));
7286 }
7287
7288 static ssize_t store_filter_flags(struct device *d,
7289                                   struct device_attribute *attr,
7290                                   const char *buf, size_t count)
7291 {
7292         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7293         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7294
7295         mutex_lock(&priv->mutex);
7296         if (le32_to_cpu(priv->staging39_rxon.filter_flags) != filter_flags) {
7297                 /* Cancel any currently running scans... */
7298                 if (iwl3945_scan_cancel_timeout(priv, 100))
7299                         IWL_WARN(priv, "Could not cancel scan.\n");
7300                 else {
7301                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7302                                        "0x%04X\n", filter_flags);
7303                         priv->staging39_rxon.filter_flags =
7304                                 cpu_to_le32(filter_flags);
7305                         iwl3945_commit_rxon(priv);
7306                 }
7307         }
7308         mutex_unlock(&priv->mutex);
7309
7310         return count;
7311 }
7312
7313 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7314                    store_filter_flags);
7315
7316 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7317
7318 static ssize_t show_measurement(struct device *d,
7319                                 struct device_attribute *attr, char *buf)
7320 {
7321         struct iwl_priv *priv = dev_get_drvdata(d);
7322         struct iwl_spectrum_notification measure_report;
7323         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7324         u8 *data = (u8 *)&measure_report;
7325         unsigned long flags;
7326
7327         spin_lock_irqsave(&priv->lock, flags);
7328         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7329                 spin_unlock_irqrestore(&priv->lock, flags);
7330                 return 0;
7331         }
7332         memcpy(&measure_report, &priv->measure_report, size);
7333         priv->measurement_status = 0;
7334         spin_unlock_irqrestore(&priv->lock, flags);
7335
7336         while (size && (PAGE_SIZE - len)) {
7337                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7338                                    PAGE_SIZE - len, 1);
7339                 len = strlen(buf);
7340                 if (PAGE_SIZE - len)
7341                         buf[len++] = '\n';
7342
7343                 ofs += 16;
7344                 size -= min(size, 16U);
7345         }
7346
7347         return len;
7348 }
7349
7350 static ssize_t store_measurement(struct device *d,
7351                                  struct device_attribute *attr,
7352                                  const char *buf, size_t count)
7353 {
7354         struct iwl_priv *priv = dev_get_drvdata(d);
7355         struct ieee80211_measurement_params params = {
7356                 .channel = le16_to_cpu(priv->active39_rxon.channel),
7357                 .start_time = cpu_to_le64(priv->last_tsf),
7358                 .duration = cpu_to_le16(1),
7359         };
7360         u8 type = IWL_MEASURE_BASIC;
7361         u8 buffer[32];
7362         u8 channel;
7363
7364         if (count) {
7365                 char *p = buffer;
7366                 strncpy(buffer, buf, min(sizeof(buffer), count));
7367                 channel = simple_strtoul(p, NULL, 0);
7368                 if (channel)
7369                         params.channel = channel;
7370
7371                 p = buffer;
7372                 while (*p && *p != ' ')
7373                         p++;
7374                 if (*p)
7375                         type = simple_strtoul(p + 1, NULL, 0);
7376         }
7377
7378         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7379                        "channel %d (for '%s')\n", type, params.channel, buf);
7380         iwl3945_get_measurement(priv, &params, type);
7381
7382         return count;
7383 }
7384
7385 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7386                    show_measurement, store_measurement);
7387 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
7388
7389 static ssize_t store_retry_rate(struct device *d,
7390                                 struct device_attribute *attr,
7391                                 const char *buf, size_t count)
7392 {
7393         struct iwl_priv *priv = dev_get_drvdata(d);
7394
7395         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7396         if (priv->retry_rate <= 0)
7397                 priv->retry_rate = 1;
7398
7399         return count;
7400 }
7401
7402 static ssize_t show_retry_rate(struct device *d,
7403                                struct device_attribute *attr, char *buf)
7404 {
7405         struct iwl_priv *priv = dev_get_drvdata(d);
7406         return sprintf(buf, "%d", priv->retry_rate);
7407 }
7408
7409 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7410                    store_retry_rate);
7411
7412 static ssize_t store_power_level(struct device *d,
7413                                  struct device_attribute *attr,
7414                                  const char *buf, size_t count)
7415 {
7416         struct iwl_priv *priv = dev_get_drvdata(d);
7417         int rc;
7418         int mode;
7419
7420         mode = simple_strtoul(buf, NULL, 0);
7421         mutex_lock(&priv->mutex);
7422
7423         if (!iwl3945_is_ready(priv)) {
7424                 rc = -EAGAIN;
7425                 goto out;
7426         }
7427
7428         if ((mode < 1) || (mode > IWL39_POWER_LIMIT) ||
7429             (mode == IWL39_POWER_AC))
7430                 mode = IWL39_POWER_AC;
7431         else
7432                 mode |= IWL_POWER_ENABLED;
7433
7434         if (mode != priv->power_mode) {
7435                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7436                 if (rc) {
7437                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7438                         goto out;
7439                 }
7440                 priv->power_mode = mode;
7441         }
7442
7443         rc = count;
7444
7445  out:
7446         mutex_unlock(&priv->mutex);
7447         return rc;
7448 }
7449
7450 #define MAX_WX_STRING 80
7451
7452 /* Values are in microsecond */
7453 static const s32 timeout_duration[] = {
7454         350000,
7455         250000,
7456         75000,
7457         37000,
7458         25000,
7459 };
7460 static const s32 period_duration[] = {
7461         400000,
7462         700000,
7463         1000000,
7464         1000000,
7465         1000000
7466 };
7467
7468 static ssize_t show_power_level(struct device *d,
7469                                 struct device_attribute *attr, char *buf)
7470 {
7471         struct iwl_priv *priv = dev_get_drvdata(d);
7472         int level = IWL_POWER_LEVEL(priv->power_mode);
7473         char *p = buf;
7474
7475         p += sprintf(p, "%d ", level);
7476         switch (level) {
7477         case IWL_POWER_MODE_CAM:
7478         case IWL39_POWER_AC:
7479                 p += sprintf(p, "(AC)");
7480                 break;
7481         case IWL39_POWER_BATTERY:
7482                 p += sprintf(p, "(BATTERY)");
7483                 break;
7484         default:
7485                 p += sprintf(p,
7486                              "(Timeout %dms, Period %dms)",
7487                              timeout_duration[level - 1] / 1000,
7488                              period_duration[level - 1] / 1000);
7489         }
7490
7491         if (!(priv->power_mode & IWL_POWER_ENABLED))
7492                 p += sprintf(p, " OFF\n");
7493         else
7494                 p += sprintf(p, " \n");
7495
7496         return p - buf + 1;
7497
7498 }
7499
7500 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7501                    store_power_level);
7502
7503 static ssize_t show_channels(struct device *d,
7504                              struct device_attribute *attr, char *buf)
7505 {
7506         /* all this shit doesn't belong into sysfs anyway */
7507         return 0;
7508 }
7509
7510 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7511
7512 static ssize_t show_statistics(struct device *d,
7513                                struct device_attribute *attr, char *buf)
7514 {
7515         struct iwl_priv *priv = dev_get_drvdata(d);
7516         u32 size = sizeof(struct iwl3945_notif_statistics);
7517         u32 len = 0, ofs = 0;
7518         u8 *data = (u8 *)&priv->statistics_39;
7519         int rc = 0;
7520
7521         if (!iwl3945_is_alive(priv))
7522                 return -EAGAIN;
7523
7524         mutex_lock(&priv->mutex);
7525         rc = iwl3945_send_statistics_request(priv);
7526         mutex_unlock(&priv->mutex);
7527
7528         if (rc) {
7529                 len = sprintf(buf,
7530                               "Error sending statistics request: 0x%08X\n", rc);
7531                 return len;
7532         }
7533
7534         while (size && (PAGE_SIZE - len)) {
7535                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7536                                    PAGE_SIZE - len, 1);
7537                 len = strlen(buf);
7538                 if (PAGE_SIZE - len)
7539                         buf[len++] = '\n';
7540
7541                 ofs += 16;
7542                 size -= min(size, 16U);
7543         }
7544
7545         return len;
7546 }
7547
7548 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7549
7550 static ssize_t show_antenna(struct device *d,
7551                             struct device_attribute *attr, char *buf)
7552 {
7553         struct iwl_priv *priv = dev_get_drvdata(d);
7554
7555         if (!iwl3945_is_alive(priv))
7556                 return -EAGAIN;
7557
7558         return sprintf(buf, "%d\n", priv->antenna);
7559 }
7560
7561 static ssize_t store_antenna(struct device *d,
7562                              struct device_attribute *attr,
7563                              const char *buf, size_t count)
7564 {
7565         int ant;
7566         struct iwl_priv *priv = dev_get_drvdata(d);
7567
7568         if (count == 0)
7569                 return 0;
7570
7571         if (sscanf(buf, "%1i", &ant) != 1) {
7572                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7573                 return count;
7574         }
7575
7576         if ((ant >= 0) && (ant <= 2)) {
7577                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7578                 priv->antenna = (enum iwl3945_antenna)ant;
7579         } else
7580                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7581
7582
7583         return count;
7584 }
7585
7586 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7587
7588 static ssize_t show_status(struct device *d,
7589                            struct device_attribute *attr, char *buf)
7590 {
7591         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7592         if (!iwl3945_is_alive(priv))
7593                 return -EAGAIN;
7594         return sprintf(buf, "0x%08x\n", (int)priv->status);
7595 }
7596
7597 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7598
7599 static ssize_t dump_error_log(struct device *d,
7600                               struct device_attribute *attr,
7601                               const char *buf, size_t count)
7602 {
7603         char *p = (char *)buf;
7604
7605         if (p[0] == '1')
7606                 iwl3945_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7607
7608         return strnlen(buf, count);
7609 }
7610
7611 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7612
7613 static ssize_t dump_event_log(struct device *d,
7614                               struct device_attribute *attr,
7615                               const char *buf, size_t count)
7616 {
7617         char *p = (char *)buf;
7618
7619         if (p[0] == '1')
7620                 iwl3945_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7621
7622         return strnlen(buf, count);
7623 }
7624
7625 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7626
7627 /*****************************************************************************
7628  *
7629  * driver setup and tear down
7630  *
7631  *****************************************************************************/
7632
7633 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
7634 {
7635         priv->workqueue = create_workqueue(DRV_NAME);
7636
7637         init_waitqueue_head(&priv->wait_command_queue);
7638
7639         INIT_WORK(&priv->up, iwl3945_bg_up);
7640         INIT_WORK(&priv->restart, iwl3945_bg_restart);
7641         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
7642         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
7643         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
7644         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
7645         INIT_WORK(&priv->rf_kill, iwl3945_bg_rf_kill);
7646         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
7647         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
7648         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
7649         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
7650
7651         iwl3945_hw_setup_deferred_work(priv);
7652
7653         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7654                      iwl3945_irq_tasklet, (unsigned long)priv);
7655 }
7656
7657 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
7658 {
7659         iwl3945_hw_cancel_deferred_work(priv);
7660
7661         cancel_delayed_work_sync(&priv->init_alive_start);
7662         cancel_delayed_work(&priv->scan_check);
7663         cancel_delayed_work(&priv->alive_start);
7664         cancel_work_sync(&priv->beacon_update);
7665 }
7666
7667 static struct attribute *iwl3945_sysfs_entries[] = {
7668         &dev_attr_antenna.attr,
7669         &dev_attr_channels.attr,
7670         &dev_attr_dump_errors.attr,
7671         &dev_attr_dump_events.attr,
7672         &dev_attr_flags.attr,
7673         &dev_attr_filter_flags.attr,
7674 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
7675         &dev_attr_measurement.attr,
7676 #endif
7677         &dev_attr_power_level.attr,
7678         &dev_attr_retry_rate.attr,
7679         &dev_attr_statistics.attr,
7680         &dev_attr_status.attr,
7681         &dev_attr_temperature.attr,
7682         &dev_attr_tx_power.attr,
7683 #ifdef CONFIG_IWL3945_DEBUG
7684         &dev_attr_debug_level.attr,
7685 #endif
7686         NULL
7687 };
7688
7689 static struct attribute_group iwl3945_attribute_group = {
7690         .name = NULL,           /* put in device directory */
7691         .attrs = iwl3945_sysfs_entries,
7692 };
7693
7694 static struct ieee80211_ops iwl3945_hw_ops = {
7695         .tx = iwl3945_mac_tx,
7696         .start = iwl3945_mac_start,
7697         .stop = iwl3945_mac_stop,
7698         .add_interface = iwl3945_mac_add_interface,
7699         .remove_interface = iwl3945_mac_remove_interface,
7700         .config = iwl3945_mac_config,
7701         .config_interface = iwl3945_mac_config_interface,
7702         .configure_filter = iwl3945_configure_filter,
7703         .set_key = iwl3945_mac_set_key,
7704         .get_tx_stats = iwl3945_mac_get_tx_stats,
7705         .conf_tx = iwl3945_mac_conf_tx,
7706         .reset_tsf = iwl3945_mac_reset_tsf,
7707         .bss_info_changed = iwl3945_bss_info_changed,
7708         .hw_scan = iwl3945_mac_hw_scan
7709 };
7710
7711 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7712 {
7713         int err = 0;
7714         struct iwl_priv *priv;
7715         struct ieee80211_hw *hw;
7716         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7717         unsigned long flags;
7718
7719         /***********************
7720          * 1. Allocating HW data
7721          * ********************/
7722
7723         /* mac80211 allocates memory for this device instance, including
7724          *   space for this driver's private structure */
7725         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl3945_hw_ops);
7726         if (hw == NULL) {
7727                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
7728                 err = -ENOMEM;
7729                 goto out;
7730         }
7731
7732         SET_IEEE80211_DEV(hw, &pdev->dev);
7733
7734         priv = hw->priv;
7735         priv->hw = hw;
7736         priv->pci_dev = pdev;
7737         priv->cfg = cfg;
7738
7739         if ((iwl3945_param_queues_num > IWL39_MAX_NUM_QUEUES) ||
7740             (iwl3945_param_queues_num < IWL_MIN_NUM_QUEUES)) {
7741                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
7742                           IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
7743                 err = -EINVAL;
7744                 goto out;
7745         }
7746
7747         /* Disabling hardware scan means that mac80211 will perform scans
7748          * "the hard way", rather than using device's scan. */
7749         if (iwl3945_param_disable_hw_scan) {
7750                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7751                 iwl3945_hw_ops.hw_scan = NULL;
7752         }
7753
7754         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7755         hw->rate_control_algorithm = "iwl-3945-rs";
7756         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
7757
7758         /* Select antenna (may be helpful if only one antenna is connected) */
7759         priv->antenna = (enum iwl3945_antenna)iwl3945_param_antenna;
7760 #ifdef CONFIG_IWL3945_DEBUG
7761         priv->debug_level = iwl3945_param_debug;
7762         atomic_set(&priv->restrict_refcnt, 0);
7763 #endif
7764
7765         /* Tell mac80211 our characteristics */
7766         hw->flags = IEEE80211_HW_SIGNAL_DBM |
7767                     IEEE80211_HW_NOISE_DBM;
7768
7769         hw->wiphy->interface_modes =
7770                 BIT(NL80211_IFTYPE_STATION) |
7771                 BIT(NL80211_IFTYPE_ADHOC);
7772
7773         hw->wiphy->fw_handles_regulatory = true;
7774
7775         /* 4 EDCA QOS priorities */
7776         hw->queues = 4;
7777
7778         /***************************
7779          * 2. Initializing PCI bus
7780          * *************************/
7781         if (pci_enable_device(pdev)) {
7782                 err = -ENODEV;
7783                 goto out_ieee80211_free_hw;
7784         }
7785
7786         pci_set_master(pdev);
7787
7788         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7789         if (!err)
7790                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7791         if (err) {
7792                 IWL_WARN(priv, "No suitable DMA available.\n");
7793                 goto out_pci_disable_device;
7794         }
7795
7796         pci_set_drvdata(pdev, priv);
7797         err = pci_request_regions(pdev, DRV_NAME);
7798         if (err)
7799                 goto out_pci_disable_device;
7800
7801         /***********************
7802          * 3. Read REV Register
7803          * ********************/
7804         priv->hw_base = pci_iomap(pdev, 0, 0);
7805         if (!priv->hw_base) {
7806                 err = -ENODEV;
7807                 goto out_pci_release_regions;
7808         }
7809
7810         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7811                         (unsigned long long) pci_resource_len(pdev, 0));
7812         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7813
7814         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7815          * PCI Tx retries from interfering with C3 CPU state */
7816         pci_write_config_byte(pdev, 0x41, 0x00);
7817
7818         /* nic init */
7819         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7820                         CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7821
7822         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7823         err = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
7824                                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7825         if (err < 0) {
7826                 IWL_DEBUG_INFO("Failed to init the card\n");
7827                 goto out_remove_sysfs;
7828         }
7829
7830         /***********************
7831          * 4. Read EEPROM
7832          * ********************/
7833         /* Read the EEPROM */
7834         err = iwl3945_eeprom_init(priv);
7835         if (err) {
7836                 IWL_ERROR("Unable to init EEPROM\n");
7837                 goto out_remove_sysfs;
7838         }
7839         /* MAC Address location in EEPROM same for 3945/4965 */
7840         get_eeprom_mac(priv, priv->mac_addr);
7841         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
7842         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7843
7844         /***********************
7845          * 5. Setup HW Constants
7846          * ********************/
7847         /* Device-specific setup */
7848         if (iwl3945_hw_set_hw_params(priv)) {
7849                 IWL_ERROR("failed to set hw settings\n");
7850                 goto out_iounmap;
7851         }
7852
7853         /***********************
7854          * 6. Setup priv
7855          * ********************/
7856         priv->retry_rate = 1;
7857         priv->ibss_beacon = NULL;
7858
7859         spin_lock_init(&priv->lock);
7860         spin_lock_init(&priv->power_data_39.lock);
7861         spin_lock_init(&priv->sta_lock);
7862         spin_lock_init(&priv->hcmd_lock);
7863
7864         INIT_LIST_HEAD(&priv->free_frames);
7865         mutex_init(&priv->mutex);
7866
7867         /* Clear the driver's (not device's) station table */
7868         iwl3945_clear_stations_table(priv);
7869
7870         priv->data_retry_limit = -1;
7871         priv->ieee_channels = NULL;
7872         priv->ieee_rates = NULL;
7873         priv->band = IEEE80211_BAND_2GHZ;
7874
7875         priv->iw_mode = NL80211_IFTYPE_STATION;
7876
7877         iwl3945_reset_qos(priv);
7878
7879         priv->qos_data.qos_active = 0;
7880         priv->qos_data.qos_cap.val = 0;
7881
7882
7883         priv->rates_mask = IWL_RATES_MASK;
7884         /* If power management is turned on, default to AC mode */
7885         priv->power_mode = IWL39_POWER_AC;
7886         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
7887
7888         err = iwl3945_init_channel_map(priv);
7889         if (err) {
7890                 IWL_ERROR("initializing regulatory failed: %d\n", err);
7891                 goto out_release_irq;
7892         }
7893
7894         err = iwl3945_init_geos(priv);
7895         if (err) {
7896                 IWL_ERROR("initializing geos failed: %d\n", err);
7897                 goto out_free_channel_map;
7898         }
7899
7900         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
7901                 priv->cfg->name);
7902
7903         /***********************************
7904          * 7. Initialize Module Parameters
7905          * **********************************/
7906
7907         /* Initialize module parameter values here */
7908         /* Disable radio (SW RF KILL) via parameter when loading driver */
7909         if (iwl3945_param_disable) {
7910                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7911                 IWL_DEBUG_INFO("Radio disabled.\n");
7912         }
7913
7914
7915         /***********************
7916          * 8. Setup Services
7917          * ********************/
7918
7919         spin_lock_irqsave(&priv->lock, flags);
7920         iwl3945_disable_interrupts(priv);
7921         spin_unlock_irqrestore(&priv->lock, flags);
7922
7923         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
7924         if (err) {
7925                 IWL_ERROR("failed to create sysfs device attributes\n");
7926                 goto out_free_geos;
7927         }
7928
7929         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
7930         iwl3945_setup_deferred_work(priv);
7931         iwl3945_setup_rx_handlers(priv);
7932
7933         /***********************
7934          * 9. Conclude
7935          * ********************/
7936         pci_save_state(pdev);
7937         pci_disable_device(pdev);
7938
7939         /*********************************
7940          * 10. Setup and Register mac80211
7941          * *******************************/
7942
7943         err = ieee80211_register_hw(priv->hw);
7944         if (err) {
7945                 IWL_ERROR("Failed to register network device (error %d)\n", err);
7946                 goto  out_remove_sysfs;
7947         }
7948
7949         priv->hw->conf.beacon_int = 100;
7950         priv->mac80211_registered = 1;
7951
7952
7953         err = iwl3945_rfkill_init(priv);
7954         if (err)
7955                 IWL_ERROR("Unable to initialize RFKILL system. "
7956                                   "Ignoring error: %d\n", err);
7957
7958         return 0;
7959
7960  out_remove_sysfs:
7961         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
7962  out_free_geos:
7963         iwl3945_free_geos(priv);
7964  out_free_channel_map:
7965         iwl3945_free_channel_map(priv);
7966
7967
7968  out_release_irq:
7969         destroy_workqueue(priv->workqueue);
7970         priv->workqueue = NULL;
7971         iwl3945_unset_hw_params(priv);
7972
7973  out_iounmap:
7974         pci_iounmap(pdev, priv->hw_base);
7975  out_pci_release_regions:
7976         pci_release_regions(pdev);
7977  out_pci_disable_device:
7978         pci_disable_device(pdev);
7979         pci_set_drvdata(pdev, NULL);
7980  out_ieee80211_free_hw:
7981         ieee80211_free_hw(priv->hw);
7982  out:
7983         return err;
7984 }
7985
7986 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
7987 {
7988         struct iwl_priv *priv = pci_get_drvdata(pdev);
7989         unsigned long flags;
7990
7991         if (!priv)
7992                 return;
7993
7994         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7995
7996         set_bit(STATUS_EXIT_PENDING, &priv->status);
7997
7998         iwl3945_down(priv);
7999
8000         /* make sure we flush any pending irq or
8001          * tasklet for the driver
8002          */
8003         spin_lock_irqsave(&priv->lock, flags);
8004         iwl3945_disable_interrupts(priv);
8005         spin_unlock_irqrestore(&priv->lock, flags);
8006
8007         iwl_synchronize_irq(priv);
8008
8009         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
8010
8011         iwl3945_rfkill_unregister(priv);
8012         iwl3945_dealloc_ucode_pci(priv);
8013
8014         if (priv->rxq.bd)
8015                 iwl3945_rx_queue_free(priv, &priv->rxq);
8016         iwl3945_hw_txq_ctx_free(priv);
8017
8018         iwl3945_unset_hw_params(priv);
8019         iwl3945_clear_stations_table(priv);
8020
8021         if (priv->mac80211_registered)
8022                 ieee80211_unregister_hw(priv->hw);
8023
8024         /*netif_stop_queue(dev); */
8025         flush_workqueue(priv->workqueue);
8026
8027         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
8028          * priv->workqueue... so we can't take down the workqueue
8029          * until now... */
8030         destroy_workqueue(priv->workqueue);
8031         priv->workqueue = NULL;
8032
8033         pci_iounmap(pdev, priv->hw_base);
8034         pci_release_regions(pdev);
8035         pci_disable_device(pdev);
8036         pci_set_drvdata(pdev, NULL);
8037
8038         iwl3945_free_channel_map(priv);
8039         iwl3945_free_geos(priv);
8040         kfree(priv->scan39);
8041         if (priv->ibss_beacon)
8042                 dev_kfree_skb(priv->ibss_beacon);
8043
8044         ieee80211_free_hw(priv->hw);
8045 }
8046
8047 #ifdef CONFIG_PM
8048
8049 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8050 {
8051         struct iwl_priv *priv = pci_get_drvdata(pdev);
8052
8053         if (priv->is_open) {
8054                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8055                 iwl3945_mac_stop(priv->hw);
8056                 priv->is_open = 1;
8057         }
8058
8059         pci_set_power_state(pdev, PCI_D3hot);
8060
8061         return 0;
8062 }
8063
8064 static int iwl3945_pci_resume(struct pci_dev *pdev)
8065 {
8066         struct iwl_priv *priv = pci_get_drvdata(pdev);
8067
8068         pci_set_power_state(pdev, PCI_D0);
8069
8070         if (priv->is_open)
8071                 iwl3945_mac_start(priv->hw);
8072
8073         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8074         return 0;
8075 }
8076
8077 #endif /* CONFIG_PM */
8078
8079 /*************** RFKILL FUNCTIONS **********/
8080 #ifdef CONFIG_IWL3945_RFKILL
8081 /* software rf-kill from user */
8082 static int iwl3945_rfkill_soft_rf_kill(void *data, enum rfkill_state state)
8083 {
8084         struct iwl_priv *priv = data;
8085         int err = 0;
8086
8087         if (!priv->rfkill)
8088         return 0;
8089
8090         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
8091                 return 0;
8092
8093         IWL_DEBUG_RF_KILL("we received soft RFKILL set to state %d\n", state);
8094         mutex_lock(&priv->mutex);
8095
8096         switch (state) {
8097         case RFKILL_STATE_UNBLOCKED:
8098                 if (iwl3945_is_rfkill_hw(priv)) {
8099                         err = -EBUSY;
8100                         goto out_unlock;
8101                 }
8102                 iwl3945_radio_kill_sw(priv, 0);
8103                 break;
8104         case RFKILL_STATE_SOFT_BLOCKED:
8105                 iwl3945_radio_kill_sw(priv, 1);
8106                 break;
8107         default:
8108                 IWL_WARN(priv, "received unexpected RFKILL state %d\n", state);
8109                 break;
8110         }
8111 out_unlock:
8112         mutex_unlock(&priv->mutex);
8113
8114         return err;
8115 }
8116
8117 int iwl3945_rfkill_init(struct iwl_priv *priv)
8118 {
8119         struct device *device = wiphy_dev(priv->hw->wiphy);
8120         int ret = 0;
8121
8122         BUG_ON(device == NULL);
8123
8124         IWL_DEBUG_RF_KILL("Initializing RFKILL.\n");
8125         priv->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
8126         if (!priv->rfkill) {
8127                 IWL_ERROR("Unable to allocate rfkill device.\n");
8128                 ret = -ENOMEM;
8129                 goto error;
8130         }
8131
8132         priv->rfkill->name = priv->cfg->name;
8133         priv->rfkill->data = priv;
8134         priv->rfkill->state = RFKILL_STATE_UNBLOCKED;
8135         priv->rfkill->toggle_radio = iwl3945_rfkill_soft_rf_kill;
8136         priv->rfkill->user_claim_unsupported = 1;
8137
8138         priv->rfkill->dev.class->suspend = NULL;
8139         priv->rfkill->dev.class->resume = NULL;
8140
8141         ret = rfkill_register(priv->rfkill);
8142         if (ret) {
8143                 IWL_ERROR("Unable to register rfkill: %d\n", ret);
8144                 goto freed_rfkill;
8145         }
8146
8147         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8148         return ret;
8149
8150 freed_rfkill:
8151         if (priv->rfkill != NULL)
8152                 rfkill_free(priv->rfkill);
8153         priv->rfkill = NULL;
8154
8155 error:
8156         IWL_DEBUG_RF_KILL("RFKILL initialization complete.\n");
8157         return ret;
8158 }
8159
8160 void iwl3945_rfkill_unregister(struct iwl_priv *priv)
8161 {
8162         if (priv->rfkill)
8163                 rfkill_unregister(priv->rfkill);
8164
8165         priv->rfkill = NULL;
8166 }
8167
8168 /* set rf-kill to the right state. */
8169 void iwl3945_rfkill_set_hw_state(struct iwl_priv *priv)
8170 {
8171
8172         if (!priv->rfkill)
8173                 return;
8174
8175         if (iwl3945_is_rfkill_hw(priv)) {
8176                 rfkill_force_state(priv->rfkill, RFKILL_STATE_HARD_BLOCKED);
8177                 return;
8178         }
8179
8180         if (!iwl3945_is_rfkill_sw(priv))
8181                 rfkill_force_state(priv->rfkill, RFKILL_STATE_UNBLOCKED);
8182         else
8183                 rfkill_force_state(priv->rfkill, RFKILL_STATE_SOFT_BLOCKED);
8184 }
8185 #endif
8186
8187 /*****************************************************************************
8188  *
8189  * driver and module entry point
8190  *
8191  *****************************************************************************/
8192
8193 static struct pci_driver iwl3945_driver = {
8194         .name = DRV_NAME,
8195         .id_table = iwl3945_hw_card_ids,
8196         .probe = iwl3945_pci_probe,
8197         .remove = __devexit_p(iwl3945_pci_remove),
8198 #ifdef CONFIG_PM
8199         .suspend = iwl3945_pci_suspend,
8200         .resume = iwl3945_pci_resume,
8201 #endif
8202 };
8203
8204 static int __init iwl3945_init(void)
8205 {
8206
8207         int ret;
8208         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8209         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8210
8211         ret = iwl3945_rate_control_register();
8212         if (ret) {
8213                 printk(KERN_ERR DRV_NAME
8214                        "Unable to register rate control algorithm: %d\n", ret);
8215                 return ret;
8216         }
8217
8218         ret = pci_register_driver(&iwl3945_driver);
8219         if (ret) {
8220                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
8221                 goto error_register;
8222         }
8223
8224         return ret;
8225
8226 error_register:
8227         iwl3945_rate_control_unregister();
8228         return ret;
8229 }
8230
8231 static void __exit iwl3945_exit(void)
8232 {
8233         pci_unregister_driver(&iwl3945_driver);
8234         iwl3945_rate_control_unregister();
8235 }
8236
8237 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
8238
8239 module_param_named(antenna, iwl3945_param_antenna, int, 0444);
8240 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
8241 module_param_named(disable, iwl3945_param_disable, int, 0444);
8242 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
8243 module_param_named(hwcrypto, iwl3945_param_hwcrypto, int, 0444);
8244 MODULE_PARM_DESC(hwcrypto,
8245                  "using hardware crypto engine (default 0 [software])\n");
8246 module_param_named(debug, iwl3945_param_debug, uint, 0444);
8247 MODULE_PARM_DESC(debug, "debug output mask");
8248 module_param_named(disable_hw_scan, iwl3945_param_disable_hw_scan, int, 0444);
8249 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
8250
8251 module_param_named(queues_num, iwl3945_param_queues_num, int, 0444);
8252 MODULE_PARM_DESC(queues_num, "number of hw queues.");
8253
8254 module_exit(iwl3945_exit);
8255 module_init(iwl3945_init);