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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 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-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-helpers.h"
  57 #include "iwl-core.h"
  58 #include "iwl-dev.h"
  59
  60 /*
  61  * module name, copyright, version, etc.
  62  */
  63
  64 #define DRV_DESCRIPTION \
  65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 #define VD "d"
  69 #else
  70 #define VD
  71 #endif
  72
  73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  74 #define VS "s"
  75 #else
  76 #define VS
  77 #endif
  78
  79 #define IWL39_VERSION "1.2.26k" VD VS
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82 #define DRV_VERSION     IWL39_VERSION
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89
  90  /* module parameters */
  91 struct iwl_mod_params iwl3945_mod_params = {
  92         .num_of_queues = IWL39_MAX_NUM_QUEUES,
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /*************** STATION TABLE MANAGEMENT ****
  99  * mac80211 should be examined to determine if sta_info is duplicating
 100  * the functionality provided here
 101  */
 102
 103 /**************************************************************/
 104 #if 0 /* temporary disable till we add real remove station */
 105 /**
 106  * iwl3945_remove_station - Remove driver's knowledge of station.
 107  *
 108  * NOTE:  This does not remove station from device's station table.
 109  */
 110 static u8 iwl3945_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 111 {
 112         int index = IWL_INVALID_STATION;
 113         int i;
 114         unsigned long flags;
 115
 116         spin_lock_irqsave(&priv->sta_lock, flags);
 117
 118         if (is_ap)
 119                 index = IWL_AP_ID;
 120         else if (is_broadcast_ether_addr(addr))
 121                 index = priv->hw_params.bcast_sta_id;
 122         else
 123                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 124                         if (priv->stations_39[i].used &&
 125                             !compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 126                                                 addr)) {
 127                                 index = i;
 128                                 break;
 129                         }
 130
 131         if (unlikely(index == IWL_INVALID_STATION))
 132                 goto out;
 133
 134         if (priv->stations_39[index].used) {
 135                 priv->stations_39[index].used = 0;
 136                 priv->num_stations--;
 137         }
 138
 139         BUG_ON(priv->num_stations < 0);
 140
 141 out:
 142         spin_unlock_irqrestore(&priv->sta_lock, flags);
 143         return 0;
 144 }
 145 #endif
 146
 147 /**
 148  * iwl3945_clear_stations_table - Clear the driver's station table
 149  *
 150  * NOTE:  This does not clear or otherwise alter the device's station table.
 151  */
 152 static void iwl3945_clear_stations_table(struct iwl_priv *priv)
 153 {
 154         unsigned long flags;
 155
 156         spin_lock_irqsave(&priv->sta_lock, flags);
 157
 158         priv->num_stations = 0;
 159         memset(priv->stations_39, 0, sizeof(priv->stations_39));
 160
 161         spin_unlock_irqrestore(&priv->sta_lock, flags);
 162 }
 163
 164 /**
 165  * iwl3945_add_station - Add station to station tables in driver and device
 166  */
 167 u8 iwl3945_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
 168 {
 169         int i;
 170         int index = IWL_INVALID_STATION;
 171         struct iwl3945_station_entry *station;
 172         unsigned long flags_spin;
 173         u8 rate;
 174
 175         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 176         if (is_ap)
 177                 index = IWL_AP_ID;
 178         else if (is_broadcast_ether_addr(addr))
 179                 index = priv->hw_params.bcast_sta_id;
 180         else
 181                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 182                         if (!compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 183                                                 addr)) {
 184                                 index = i;
 185                                 break;
 186                         }
 187
 188                         if (!priv->stations_39[i].used &&
 189                             index == IWL_INVALID_STATION)
 190                                 index = i;
 191                 }
 192
 193         /* These two conditions has the same outcome but keep them separate
 194           since they have different meaning */
 195         if (unlikely(index == IWL_INVALID_STATION)) {
 196                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 197                 return index;
 198         }
 199
 200         if (priv->stations_39[index].used &&
 201            !compare_ether_addr(priv->stations_39[index].sta.sta.addr, addr)) {
 202                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 203                 return index;
 204         }
 205
 206         IWL_DEBUG_ASSOC("Add STA ID %d: %pM\n", index, addr);
 207         station = &priv->stations_39[index];
 208         station->used = 1;
 209         priv->num_stations++;
 210
 211         /* Set up the REPLY_ADD_STA command to send to device */
 212         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 213         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 214         station->sta.mode = 0;
 215         station->sta.sta.sta_id = index;
 216         station->sta.station_flags = 0;
 217
 218         if (priv->band == IEEE80211_BAND_5GHZ)
 219                 rate = IWL_RATE_6M_PLCP;
 220         else
 221                 rate =  IWL_RATE_1M_PLCP;
 222
 223         /* Turn on both antennas for the station... */
 224         station->sta.rate_n_flags =
 225                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 226
 227         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 228
 229         /* Add station to device's station table */
 230         iwl_send_add_sta(priv,
 231                          (struct iwl_addsta_cmd *)&station->sta, flags);
 232         return index;
 233
 234 }
 235
 236 static int iwl3945_send_rxon_assoc(struct iwl_priv *priv)
 237 {
 238         int rc = 0;
 239         struct iwl_rx_packet *res = NULL;
 240         struct iwl3945_rxon_assoc_cmd rxon_assoc;
 241         struct iwl_host_cmd cmd = {
 242                 .id = REPLY_RXON_ASSOC,
 243                 .len = sizeof(rxon_assoc),
 244                 .meta.flags = CMD_WANT_SKB,
 245                 .data = &rxon_assoc,
 246         };
 247         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
 248         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
 249
 250         if ((rxon1->flags == rxon2->flags) &&
 251             (rxon1->filter_flags == rxon2->filter_flags) &&
 252             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 253             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 254                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
 255                 return 0;
 256         }
 257
 258         rxon_assoc.flags = priv->staging_rxon.flags;
 259         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
 260         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
 261         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
 262         rxon_assoc.reserved = 0;
 263
 264         rc = iwl_send_cmd_sync(priv, &cmd);
 265         if (rc)
 266                 return rc;
 267
 268         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 269         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 270                 IWL_ERR(priv, "Bad return from REPLY_RXON_ASSOC command\n");
 271                 rc = -EIO;
 272         }
 273
 274         priv->alloc_rxb_skb--;
 275         dev_kfree_skb_any(cmd.meta.u.skb);
 276
 277         return rc;
 278 }
 279
 280 /**
 281  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 282  * @priv: eeprom and antenna fields are used to determine antenna flags
 283  *
 284  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 285  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 286  *
 287  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 288  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 289  * IWL_ANTENNA_AUX       - Force AUX antenna
 290  */
 291 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 292 {
 293         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 294
 295         switch (iwl3945_mod_params.antenna) {
 296         case IWL_ANTENNA_DIVERSITY:
 297                 return 0;
 298
 299         case IWL_ANTENNA_MAIN:
 300                 if (eeprom->antenna_switch_type)
 301                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 302                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 303
 304         case IWL_ANTENNA_AUX:
 305                 if (eeprom->antenna_switch_type)
 306                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 307                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 308         }
 309
 310         /* bad antenna selector value */
 311         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 312                 iwl3945_mod_params.antenna);
 313
 314         return 0;               /* "diversity" is default if error */
 315 }
 316
 317 /**
 318  * iwl3945_commit_rxon - commit staging_rxon to hardware
 319  *
 320  * The RXON command in staging_rxon is committed to the hardware and
 321  * the active_rxon structure is updated with the new data.  This
 322  * function correctly transitions out of the RXON_ASSOC_MSK state if
 323  * a HW tune is required based on the RXON structure changes.
 324  */
 325 static int iwl3945_commit_rxon(struct iwl_priv *priv)
 326 {
 327         /* cast away the const for active_rxon in this function */
 328         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 329         struct iwl3945_rxon_cmd *staging_rxon = (void *)&priv->staging_rxon;
 330         int rc = 0;
 331
 332         if (!iwl_is_alive(priv))
 333                 return -1;
 334
 335         /* always get timestamp with Rx frame */
 336         staging_rxon->flags |= RXON_FLG_TSF2HOST_MSK;
 337
 338         /* select antenna */
 339         staging_rxon->flags &=
 340             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
 341         staging_rxon->flags |= iwl3945_get_antenna_flags(priv);
 342
 343         rc = iwl_check_rxon_cmd(priv);
 344         if (rc) {
 345                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 346                 return -EINVAL;
 347         }
 348
 349         /* If we don't need to send a full RXON, we can use
 350          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
 351          * and other flags for the current radio configuration. */
 352         if (!iwl_full_rxon_required(priv)) {
 353                 rc = iwl3945_send_rxon_assoc(priv);
 354                 if (rc) {
 355                         IWL_ERR(priv, "Error setting RXON_ASSOC "
 356                                   "configuration (%d).\n", rc);
 357                         return rc;
 358                 }
 359
 360                 memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
 361
 362                 return 0;
 363         }
 364
 365         /* If we are currently associated and the new config requires
 366          * an RXON_ASSOC and the new config wants the associated mask enabled,
 367          * we must clear the associated from the active configuration
 368          * before we apply the new config */
 369         if (iwl_is_associated(priv) &&
 370             (staging_rxon->filter_flags & RXON_FILTER_ASSOC_MSK)) {
 371                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 372                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 373
 374                 /*
 375                  * reserved4 and 5 could have been filled by the iwlcore code.
 376                  * Let's clear them before pushing to the 3945.
 377                  */
 378                 active_rxon->reserved4 = 0;
 379                 active_rxon->reserved5 = 0;
 380                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 381                                       sizeof(struct iwl3945_rxon_cmd),
 382                                       &priv->active_rxon);
 383
 384                 /* If the mask clearing failed then we set
 385                  * active_rxon back to what it was previously */
 386                 if (rc) {
 387                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 388                         IWL_ERR(priv, "Error clearing ASSOC_MSK on current "
 389                                   "configuration (%d).\n", rc);
 390                         return rc;
 391                 }
 392         }
 393
 394         IWL_DEBUG_INFO("Sending RXON\n"
 395                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 396                        "* channel = %d\n"
 397                        "* bssid = %pM\n",
 398                        ((priv->staging_rxon.filter_flags &
 399                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 400                        le16_to_cpu(staging_rxon->channel),
 401                        staging_rxon->bssid_addr);
 402
 403         /*
 404          * reserved4 and 5 could have been filled by the iwlcore code.
 405          * Let's clear them before pushing to the 3945.
 406          */
 407         staging_rxon->reserved4 = 0;
 408         staging_rxon->reserved5 = 0;
 409
 410         /* Apply the new configuration */
 411         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 412                               sizeof(struct iwl3945_rxon_cmd),
 413                               staging_rxon);
 414         if (rc) {
 415                 IWL_ERR(priv, "Error setting new configuration (%d).\n", rc);
 416                 return rc;
 417         }
 418
 419         memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
 420
 421         iwl3945_clear_stations_table(priv);
 422
 423         /* If we issue a new RXON command which required a tune then we must
 424          * send a new TXPOWER command or we won't be able to Tx any frames */
 425         rc = priv->cfg->ops->lib->send_tx_power(priv);
 426         if (rc) {
 427                 IWL_ERR(priv, "Error setting Tx power (%d).\n", rc);
 428                 return rc;
 429         }
 430
 431         /* Add the broadcast address so we can send broadcast frames */
 432         if (iwl3945_add_station(priv, iwl_bcast_addr, 0, 0) ==
 433             IWL_INVALID_STATION) {
 434                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 435                 return -EIO;
 436         }
 437
 438         /* If we have set the ASSOC_MSK and we are in BSS mode then
 439          * add the IWL_AP_ID to the station rate table */
 440         if (iwl_is_associated(priv) &&
 441             (priv->iw_mode == NL80211_IFTYPE_STATION))
 442                 if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr,
 443                                         1, 0)
 444                     == IWL_INVALID_STATION) {
 445                         IWL_ERR(priv, "Error adding AP address for transmit\n");
 446                         return -EIO;
 447                 }
 448
 449         /* Init the hardware's rate fallback order based on the band */
 450         rc = iwl3945_init_hw_rate_table(priv);
 451         if (rc) {
 452                 IWL_ERR(priv, "Error setting HW rate table: %02X\n", rc);
 453                 return -EIO;
 454         }
 455
 456         return 0;
 457 }
 458
 459 static int iwl3945_update_sta_key_info(struct iwl_priv *priv,
 460                                    struct ieee80211_key_conf *keyconf,
 461                                    u8 sta_id)
 462 {
 463         unsigned long flags;
 464         __le16 key_flags = 0;
 465
 466         switch (keyconf->alg) {
 467         case ALG_CCMP:
 468                 key_flags |= STA_KEY_FLG_CCMP;
 469                 key_flags |= cpu_to_le16(
 470                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 471                 key_flags &= ~STA_KEY_FLG_INVALID;
 472                 break;
 473         case ALG_TKIP:
 474         case ALG_WEP:
 475         default:
 476                 return -EINVAL;
 477         }
 478         spin_lock_irqsave(&priv->sta_lock, flags);
 479         priv->stations_39[sta_id].keyinfo.alg = keyconf->alg;
 480         priv->stations_39[sta_id].keyinfo.keylen = keyconf->keylen;
 481         memcpy(priv->stations_39[sta_id].keyinfo.key, keyconf->key,
 482                keyconf->keylen);
 483
 484         memcpy(priv->stations_39[sta_id].sta.key.key, keyconf->key,
 485                keyconf->keylen);
 486         priv->stations_39[sta_id].sta.key.key_flags = key_flags;
 487         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 488         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 489
 490         spin_unlock_irqrestore(&priv->sta_lock, flags);
 491
 492         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 493         iwl_send_add_sta(priv,
 494                 (struct iwl_addsta_cmd *)&priv->stations_39[sta_id].sta, 0);
 495         return 0;
 496 }
 497
 498 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 499 {
 500         unsigned long flags;
 501
 502         spin_lock_irqsave(&priv->sta_lock, flags);
 503         memset(&priv->stations_39[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
 504         memset(&priv->stations_39[sta_id].sta.key, 0,
 505                 sizeof(struct iwl4965_keyinfo));
 506         priv->stations_39[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 507         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 508         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 509         spin_unlock_irqrestore(&priv->sta_lock, flags);
 510
 511         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
 512         iwl_send_add_sta(priv,
 513                 (struct iwl_addsta_cmd *)&priv->stations_39[sta_id].sta, 0);
 514         return 0;
 515 }
 516
 517 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 518 {
 519         struct list_head *element;
 520
 521         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
 522                        priv->frames_count);
 523
 524         while (!list_empty(&priv->free_frames)) {
 525                 element = priv->free_frames.next;
 526                 list_del(element);
 527                 kfree(list_entry(element, struct iwl3945_frame, list));
 528                 priv->frames_count--;
 529         }
 530
 531         if (priv->frames_count) {
 532                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 533                             priv->frames_count);
 534                 priv->frames_count = 0;
 535         }
 536 }
 537
 538 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 539 {
 540         struct iwl3945_frame *frame;
 541         struct list_head *element;
 542         if (list_empty(&priv->free_frames)) {
 543                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 544                 if (!frame) {
 545                         IWL_ERR(priv, "Could not allocate frame!\n");
 546                         return NULL;
 547                 }
 548
 549                 priv->frames_count++;
 550                 return frame;
 551         }
 552
 553         element = priv->free_frames.next;
 554         list_del(element);
 555         return list_entry(element, struct iwl3945_frame, list);
 556 }
 557
 558 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 559 {
 560         memset(frame, 0, sizeof(*frame));
 561         list_add(&frame->list, &priv->free_frames);
 562 }
 563
 564 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 565                                 struct ieee80211_hdr *hdr,
 566                                 int left)
 567 {
 568
 569         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 570             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 571              (priv->iw_mode != NL80211_IFTYPE_AP)))
 572                 return 0;
 573
 574         if (priv->ibss_beacon->len > left)
 575                 return 0;
 576
 577         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 578
 579         return priv->ibss_beacon->len;
 580 }
 581
 582 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 583 {
 584         struct iwl3945_frame *frame;
 585         unsigned int frame_size;
 586         int rc;
 587         u8 rate;
 588
 589         frame = iwl3945_get_free_frame(priv);
 590
 591         if (!frame) {
 592                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 593                           "command.\n");
 594                 return -ENOMEM;
 595         }
 596
 597         rate = iwl_rate_get_lowest_plcp(priv);
 598
 599         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 600
 601         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 602                               &frame->u.cmd[0]);
 603
 604         iwl3945_free_frame(priv, frame);
 605
 606         return rc;
 607 }
 608
 609 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 610 {
 611         if (priv->shared_virt)
 612                 pci_free_consistent(priv->pci_dev,
 613                                     sizeof(struct iwl3945_shared),
 614                                     priv->shared_virt,
 615                                     priv->shared_phys);
 616 }
 617
 618 /*
 619  * QoS  support
 620 */
 621 static int iwl3945_send_qos_params_command(struct iwl_priv *priv,
 622                                        struct iwl_qosparam_cmd *qos)
 623 {
 624
 625         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
 626                                 sizeof(struct iwl_qosparam_cmd), qos);
 627 }
 628
 629 static void iwl3945_activate_qos(struct iwl_priv *priv, u8 force)
 630 {
 631         unsigned long flags;
 632
 633         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 634                 return;
 635
 636         spin_lock_irqsave(&priv->lock, flags);
 637         priv->qos_data.def_qos_parm.qos_flags = 0;
 638
 639         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 640             !priv->qos_data.qos_cap.q_AP.txop_request)
 641                 priv->qos_data.def_qos_parm.qos_flags |=
 642                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 643
 644         if (priv->qos_data.qos_active)
 645                 priv->qos_data.def_qos_parm.qos_flags |=
 646                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 647
 648         spin_unlock_irqrestore(&priv->lock, flags);
 649
 650         if (force || iwl_is_associated(priv)) {
 651                 IWL_DEBUG_QOS("send QoS cmd with QoS active %d \n",
 652                               priv->qos_data.qos_active);
 653
 654                 iwl3945_send_qos_params_command(priv,
 655                                 &(priv->qos_data.def_qos_parm));
 656         }
 657 }
 658
 659 /*
 660  * Power management (not Tx power!) functions
 661  */
 662 #define MSEC_TO_USEC 1024
 663
 664
 665 /* default power management (not Tx power) table values */
 666 /* for TIM  0-10 */
 667 static struct iwl_power_vec_entry range_0[IWL_POWER_MAX] = {
 668         {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
 669         {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
 670         {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
 671         {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
 672         {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
 673         {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
 674 };
 675
 676 /* for TIM > 10 */
 677 static struct iwl_power_vec_entry range_1[IWL_POWER_MAX] = {
 678         {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
 679         {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
 680         {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
 681         {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
 682         {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
 683         {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
 684 };
 685
 686 int iwl3945_power_init_handle(struct iwl_priv *priv)
 687 {
 688         int rc = 0, i;
 689         struct iwl_power_mgr *pow_data;
 690         int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_MAX;
 691         u16 pci_pm;
 692
 693         IWL_DEBUG_POWER("Initialize power \n");
 694
 695         pow_data = &priv->power_data;
 696
 697         memset(pow_data, 0, sizeof(*pow_data));
 698
 699         pow_data->dtim_period = 1;
 700
 701         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
 702         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
 703
 704         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
 705         if (rc != 0)
 706                 return 0;
 707         else {
 708                 struct iwl_powertable_cmd *cmd;
 709
 710                 IWL_DEBUG_POWER("adjust power command flags\n");
 711
 712                 for (i = 0; i < IWL_POWER_MAX; i++) {
 713                         cmd = &pow_data->pwr_range_0[i].cmd;
 714
 715                         if (pci_pm & 0x1)
 716                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
 717                         else
 718                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
 719                 }
 720         }
 721         return rc;
 722 }
 723
 724 static int iwl3945_update_power_cmd(struct iwl_priv *priv,
 725                                 struct iwl_powertable_cmd *cmd, u32 mode)
 726 {
 727         struct iwl_power_mgr *pow_data;
 728         struct iwl_power_vec_entry *range;
 729         u32 max_sleep = 0;
 730         int i;
 731         u8 period = 0;
 732         bool skip;
 733
 734         if (mode > IWL_POWER_INDEX_5) {
 735                 IWL_DEBUG_POWER("Error invalid power mode \n");
 736                 return -EINVAL;
 737         }
 738         pow_data = &priv->power_data;
 739
 740         if (pow_data->dtim_period < 10)
 741                 range = &pow_data->pwr_range_0[0];
 742         else
 743                 range = &pow_data->pwr_range_1[1];
 744
 745         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
 746
 747
 748         if (period == 0) {
 749                 period = 1;
 750                 skip = false;
 751         } else {
 752                 skip = !!range[mode].no_dtim;
 753         }
 754
 755         if (skip) {
 756                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
 757                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
 758                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
 759         } else {
 760                 max_sleep = period;
 761                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
 762         }
 763
 764         for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
 765                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
 766                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
 767
 768         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
 769         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
 770         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
 771         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
 772                         le32_to_cpu(cmd->sleep_interval[0]),
 773                         le32_to_cpu(cmd->sleep_interval[1]),
 774                         le32_to_cpu(cmd->sleep_interval[2]),
 775                         le32_to_cpu(cmd->sleep_interval[3]),
 776                         le32_to_cpu(cmd->sleep_interval[4]));
 777
 778         return 0;
 779 }
 780
 781 static int iwl3945_send_power_mode(struct iwl_priv *priv, u32 mode)
 782 {
 783         u32 uninitialized_var(final_mode);
 784         int rc;
 785         struct iwl_powertable_cmd cmd;
 786
 787         /* If on battery, set to 3,
 788          * if plugged into AC power, set to CAM ("continuously aware mode"),
 789          * else user level */
 790         switch (mode) {
 791         case IWL39_POWER_BATTERY:
 792                 final_mode = IWL_POWER_INDEX_3;
 793                 break;
 794         case IWL39_POWER_AC:
 795                 final_mode = IWL_POWER_MODE_CAM;
 796                 break;
 797         default:
 798                 final_mode = mode;
 799                 break;
 800         }
 801
 802         iwl3945_update_power_cmd(priv, &cmd, final_mode);
 803
 804         /* FIXME use get_hcmd_size 3945 command is 4 bytes shorter */
 805         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD,
 806                               sizeof(struct iwl3945_powertable_cmd), &cmd);
 807
 808         if (final_mode == IWL_POWER_MODE_CAM)
 809                 clear_bit(STATUS_POWER_PMI, &priv->status);
 810         else
 811                 set_bit(STATUS_POWER_PMI, &priv->status);
 812
 813         return rc;
 814 }
 815
 816 #define MAX_UCODE_BEACON_INTERVAL       1024
 817 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
 818
 819 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
 820 {
 821         u16 new_val = 0;
 822         u16 beacon_factor = 0;
 823
 824         beacon_factor =
 825             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 826                 / MAX_UCODE_BEACON_INTERVAL;
 827         new_val = beacon_val / beacon_factor;
 828
 829         return cpu_to_le16(new_val);
 830 }
 831
 832 static void iwl3945_setup_rxon_timing(struct iwl_priv *priv)
 833 {
 834         u64 interval_tm_unit;
 835         u64 tsf, result;
 836         unsigned long flags;
 837         struct ieee80211_conf *conf = NULL;
 838         u16 beacon_int = 0;
 839
 840         conf = ieee80211_get_hw_conf(priv->hw);
 841
 842         spin_lock_irqsave(&priv->lock, flags);
 843         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 844         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
 845
 846         tsf = priv->timestamp;
 847
 848         beacon_int = priv->beacon_int;
 849         spin_unlock_irqrestore(&priv->lock, flags);
 850
 851         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 852                 if (beacon_int == 0) {
 853                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
 854                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
 855                 } else {
 856                         priv->rxon_timing.beacon_interval =
 857                                 cpu_to_le16(beacon_int);
 858                         priv->rxon_timing.beacon_interval =
 859                             iwl3945_adjust_beacon_interval(
 860                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 861                 }
 862
 863                 priv->rxon_timing.atim_window = 0;
 864         } else {
 865                 priv->rxon_timing.beacon_interval =
 866                         iwl3945_adjust_beacon_interval(conf->beacon_int);
 867                 /* TODO: we need to get atim_window from upper stack
 868                  * for now we set to 0 */
 869                 priv->rxon_timing.atim_window = 0;
 870         }
 871
 872         interval_tm_unit =
 873                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
 874         result = do_div(tsf, interval_tm_unit);
 875         priv->rxon_timing.beacon_init_val =
 876             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
 877
 878         IWL_DEBUG_ASSOC
 879             ("beacon interval %d beacon timer %d beacon tim %d\n",
 880                 le16_to_cpu(priv->rxon_timing.beacon_interval),
 881                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
 882                 le16_to_cpu(priv->rxon_timing.atim_window));
 883 }
 884
 885 static int iwl3945_scan_initiate(struct iwl_priv *priv)
 886 {
 887         if (!iwl_is_ready_rf(priv)) {
 888                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
 889                 return -EIO;
 890         }
 891
 892         if (test_bit(STATUS_SCANNING, &priv->status)) {
 893                 IWL_DEBUG_SCAN("Scan already in progress.\n");
 894                 return -EAGAIN;
 895         }
 896
 897         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
 898                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
 899                                "Queuing.\n");
 900                 return -EAGAIN;
 901         }
 902
 903         IWL_DEBUG_INFO("Starting scan...\n");
 904         if (priv->cfg->sku & IWL_SKU_G)
 905                 priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
 906         if (priv->cfg->sku & IWL_SKU_A)
 907                 priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
 908         set_bit(STATUS_SCANNING, &priv->status);
 909         priv->scan_start = jiffies;
 910         priv->scan_pass_start = priv->scan_start;
 911
 912         queue_work(priv->workqueue, &priv->request_scan);
 913
 914         return 0;
 915 }
 916
 917 static int iwl3945_set_mode(struct iwl_priv *priv, int mode)
 918 {
 919         if (mode == NL80211_IFTYPE_ADHOC) {
 920                 const struct iwl_channel_info *ch_info;
 921
 922                 ch_info = iwl_get_channel_info(priv,
 923                         priv->band,
 924                         le16_to_cpu(priv->staging_rxon.channel));
 925
 926                 if (!ch_info || !is_channel_ibss(ch_info)) {
 927                         IWL_ERR(priv, "channel %d not IBSS channel\n",
 928                                   le16_to_cpu(priv->staging_rxon.channel));
 929                         return -EINVAL;
 930                 }
 931         }
 932
 933         iwl_connection_init_rx_config(priv, mode);
 934
 935         iwl3945_clear_stations_table(priv);
 936
 937         /* don't commit rxon if rf-kill is on*/
 938         if (!iwl_is_ready_rf(priv))
 939                 return -EAGAIN;
 940
 941         cancel_delayed_work(&priv->scan_check);
 942         if (iwl_scan_cancel_timeout(priv, 100)) {
 943                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
 944                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
 945                 return -EAGAIN;
 946         }
 947
 948         iwl3945_commit_rxon(priv);
 949
 950         return 0;
 951 }
 952
 953 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 954                                       struct ieee80211_tx_info *info,
 955                                       struct iwl_cmd *cmd,
 956                                       struct sk_buff *skb_frag,
 957                                       int last_frag)
 958 {
 959         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 960         struct iwl3945_hw_key *keyinfo =
 961             &priv->stations_39[info->control.hw_key->hw_key_idx].keyinfo;
 962
 963         switch (keyinfo->alg) {
 964         case ALG_CCMP:
 965                 tx->sec_ctl = TX_CMD_SEC_CCM;
 966                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 967                 IWL_DEBUG_TX("tx_cmd with AES hwcrypto\n");
 968                 break;
 969
 970         case ALG_TKIP:
 971 #if 0
 972                 tx->sec_ctl = TX_CMD_SEC_TKIP;
 973
 974                 if (last_frag)
 975                         memcpy(tx->tkip_mic.byte, skb_frag->tail - 8,
 976                                8);
 977                 else
 978                         memset(tx->tkip_mic.byte, 0, 8);
 979 #endif
 980                 break;
 981
 982         case ALG_WEP:
 983                 tx->sec_ctl = TX_CMD_SEC_WEP |
 984                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 985
 986                 if (keyinfo->keylen == 13)
 987                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 988
 989                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 990
 991                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
 992                              "with key %d\n", info->control.hw_key->hw_key_idx);
 993                 break;
 994
 995         default:
 996                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 997                 break;
 998         }
 999 }
1000
1001 /*
1002  * handle build REPLY_TX command notification.
1003  */
1004 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
1005                                   struct iwl_cmd *cmd,
1006                                   struct ieee80211_tx_info *info,
1007                                   struct ieee80211_hdr *hdr, u8 std_id)
1008 {
1009         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
1010         __le32 tx_flags = tx->tx_flags;
1011         __le16 fc = hdr->frame_control;
1012         u8 rc_flags = info->control.rates[0].flags;
1013
1014         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1015         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
1016                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1017                 if (ieee80211_is_mgmt(fc))
1018                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1019                 if (ieee80211_is_probe_resp(fc) &&
1020                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1021                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1022         } else {
1023                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1024                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1025         }
1026
1027         tx->sta_id = std_id;
1028         if (ieee80211_has_morefrags(fc))
1029                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1030
1031         if (ieee80211_is_data_qos(fc)) {
1032                 u8 *qc = ieee80211_get_qos_ctl(hdr);
1033                 tx->tid_tspec = qc[0] & 0xf;
1034                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1035         } else {
1036                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1037         }
1038
1039         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
1040                 tx_flags |= TX_CMD_FLG_RTS_MSK;
1041                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1042         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
1043                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1044                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1045         }
1046
1047         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1048                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1049
1050         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1051         if (ieee80211_is_mgmt(fc)) {
1052                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
1053                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
1054                 else
1055                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
1056         } else {
1057                 tx->timeout.pm_frame_timeout = 0;
1058 #ifdef CONFIG_IWL3945_LEDS
1059                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
1060 #endif
1061         }
1062
1063         tx->driver_txop = 0;
1064         tx->tx_flags = tx_flags;
1065         tx->next_frame_len = 0;
1066 }
1067
1068 /**
1069  * iwl3945_get_sta_id - Find station's index within station table
1070  */
1071 static int iwl3945_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1072 {
1073         int sta_id;
1074         u16 fc = le16_to_cpu(hdr->frame_control);
1075
1076         /* If this frame is broadcast or management, use broadcast station id */
1077         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1078             is_multicast_ether_addr(hdr->addr1))
1079                 return priv->hw_params.bcast_sta_id;
1080
1081         switch (priv->iw_mode) {
1082
1083         /* If we are a client station in a BSS network, use the special
1084          * AP station entry (that's the only station we communicate with) */
1085         case NL80211_IFTYPE_STATION:
1086                 return IWL_AP_ID;
1087
1088         /* If we are an AP, then find the station, or use BCAST */
1089         case NL80211_IFTYPE_AP:
1090                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
1091                 if (sta_id != IWL_INVALID_STATION)
1092                         return sta_id;
1093                 return priv->hw_params.bcast_sta_id;
1094
1095         /* If this frame is going out to an IBSS network, find the station,
1096          * or create a new station table entry */
1097         case NL80211_IFTYPE_ADHOC: {
1098                 /* Create new station table entry */
1099                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
1100                 if (sta_id != IWL_INVALID_STATION)
1101                         return sta_id;
1102
1103                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
1104
1105                 if (sta_id != IWL_INVALID_STATION)
1106                         return sta_id;
1107
1108                 IWL_DEBUG_DROP("Station %pM not in station map. "
1109                                "Defaulting to broadcast...\n",
1110                                hdr->addr1);
1111                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1112                 return priv->hw_params.bcast_sta_id;
1113         }
1114         /* If we are in monitor mode, use BCAST. This is required for
1115          * packet injection. */
1116         case NL80211_IFTYPE_MONITOR:
1117                 return priv->hw_params.bcast_sta_id;
1118
1119         default:
1120                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1121                         priv->iw_mode);
1122                 return priv->hw_params.bcast_sta_id;
1123         }
1124 }
1125
1126 /*
1127  * start REPLY_TX command process
1128  */
1129 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
1130 {
1131         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1132         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1133         struct iwl3945_tx_cmd *tx;
1134         struct iwl_tx_queue *txq = NULL;
1135         struct iwl_queue *q = NULL;
1136         struct iwl_cmd *out_cmd = NULL;
1137         dma_addr_t phys_addr;
1138         dma_addr_t txcmd_phys;
1139         int txq_id = skb_get_queue_mapping(skb);
1140         u16 len, idx, len_org, hdr_len;
1141         u8 id;
1142         u8 unicast;
1143         u8 sta_id;
1144         u8 tid = 0;
1145         u16 seq_number = 0;
1146         __le16 fc;
1147         u8 wait_write_ptr = 0;
1148         u8 *qc = NULL;
1149         unsigned long flags;
1150         int rc;
1151
1152         spin_lock_irqsave(&priv->lock, flags);
1153         if (iwl_is_rfkill(priv)) {
1154                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
1155                 goto drop_unlock;
1156         }
1157
1158         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
1159                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
1160                 goto drop_unlock;
1161         }
1162
1163         unicast = !is_multicast_ether_addr(hdr->addr1);
1164         id = 0;
1165
1166         fc = hdr->frame_control;
1167
1168 #ifdef CONFIG_IWLWIFI_DEBUG
1169         if (ieee80211_is_auth(fc))
1170                 IWL_DEBUG_TX("Sending AUTH frame\n");
1171         else if (ieee80211_is_assoc_req(fc))
1172                 IWL_DEBUG_TX("Sending ASSOC frame\n");
1173         else if (ieee80211_is_reassoc_req(fc))
1174                 IWL_DEBUG_TX("Sending REASSOC frame\n");
1175 #endif
1176
1177         /* drop all data frame if we are not associated */
1178         if (ieee80211_is_data(fc) &&
1179             (priv->iw_mode != NL80211_IFTYPE_MONITOR) && /* packet injection */
1180             (!iwl_is_associated(priv) ||
1181              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
1182                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
1183                 goto drop_unlock;
1184         }
1185
1186         spin_unlock_irqrestore(&priv->lock, flags);
1187
1188         hdr_len = ieee80211_hdrlen(fc);
1189
1190         /* Find (or create) index into station table for destination station */
1191         sta_id = iwl3945_get_sta_id(priv, hdr);
1192         if (sta_id == IWL_INVALID_STATION) {
1193                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %pM\n",
1194                                hdr->addr1);
1195                 goto drop;
1196         }
1197
1198         IWL_DEBUG_RATE("station Id %d\n", sta_id);
1199
1200         if (ieee80211_is_data_qos(fc)) {
1201                 qc = ieee80211_get_qos_ctl(hdr);
1202                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
1203                 seq_number = priv->stations_39[sta_id].tid[tid].seq_number &
1204                                 IEEE80211_SCTL_SEQ;
1205                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
1206                         (hdr->seq_ctrl &
1207                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
1208                 seq_number += 0x10;
1209         }
1210
1211         /* Descriptor for chosen Tx queue */
1212         txq = &priv->txq[txq_id];
1213         q = &txq->q;
1214
1215         spin_lock_irqsave(&priv->lock, flags);
1216
1217         idx = get_cmd_index(q, q->write_ptr, 0);
1218
1219         /* Set up driver data for this TFD */
1220         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
1221         txq->txb[q->write_ptr].skb[0] = skb;
1222
1223         /* Init first empty entry in queue's array of Tx/cmd buffers */
1224         out_cmd = txq->cmd[idx];
1225         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
1226         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
1227         memset(tx, 0, sizeof(*tx));
1228
1229         /*
1230          * Set up the Tx-command (not MAC!) header.
1231          * Store the chosen Tx queue and TFD index within the sequence field;
1232          * after Tx, uCode's Tx response will return this value so driver can
1233          * locate the frame within the tx queue and do post-tx processing.
1234          */
1235         out_cmd->hdr.cmd = REPLY_TX;
1236         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
1237                                 INDEX_TO_SEQ(q->write_ptr)));
1238
1239         /* Copy MAC header from skb into command buffer */
1240         memcpy(tx->hdr, hdr, hdr_len);
1241
1242         /*
1243          * Use the first empty entry in this queue's command buffer array
1244          * to contain the Tx command and MAC header concatenated together
1245          * (payload data will be in another buffer).
1246          * Size of this varies, due to varying MAC header length.
1247          * If end is not dword aligned, we'll have 2 extra bytes at the end
1248          * of the MAC header (device reads on dword boundaries).
1249          * We'll tell device about this padding later.
1250          */
1251         len = sizeof(struct iwl3945_tx_cmd) +
1252                         sizeof(struct iwl_cmd_header) + hdr_len;
1253
1254         len_org = len;
1255         len = (len + 3) & ~3;
1256
1257         if (len_org != len)
1258                 len_org = 1;
1259         else
1260                 len_org = 0;
1261
1262         /* Physical address of this Tx command's header (not MAC header!),
1263          * within command buffer array. */
1264         txcmd_phys = pci_map_single(priv->pci_dev,
1265                                     out_cmd, sizeof(struct iwl_cmd),
1266                                     PCI_DMA_TODEVICE);
1267         pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys);
1268         pci_unmap_len_set(&out_cmd->meta, len, sizeof(struct iwl_cmd));
1269         /* Add buffer containing Tx command and MAC(!) header to TFD's
1270          * first entry */
1271         txcmd_phys += offsetof(struct iwl_cmd, hdr);
1272
1273         /* Add buffer containing Tx command and MAC(!) header to TFD's
1274          * first entry */
1275         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
1276                                                    txcmd_phys, len, 1, 0);
1277
1278         if (info->control.hw_key)
1279                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
1280
1281         /* Set up TFD's 2nd entry to point directly to remainder of skb,
1282          * if any (802.11 null frames have no payload). */
1283         len = skb->len - hdr_len;
1284         if (len) {
1285                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
1286                                            len, PCI_DMA_TODEVICE);
1287                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
1288                                                            phys_addr, len,
1289                                                            0, U32_PAD(len));
1290         }
1291
1292         /* Total # bytes to be transmitted */
1293         len = (u16)skb->len;
1294         tx->len = cpu_to_le16(len);
1295
1296         /* TODO need this for burst mode later on */
1297         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
1298
1299         /* set is_hcca to 0; it probably will never be implemented */
1300         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
1301
1302         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
1303         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
1304
1305         if (!ieee80211_has_morefrags(hdr->frame_control)) {
1306                 txq->need_update = 1;
1307                 if (qc)
1308                         priv->stations_39[sta_id].tid[tid].seq_number = seq_number;
1309         } else {
1310                 wait_write_ptr = 1;
1311                 txq->need_update = 0;
1312         }
1313
1314         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
1315
1316         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
1317                            ieee80211_hdrlen(fc));
1318
1319         /* Tell device the write index *just past* this latest filled TFD */
1320         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
1321         rc = iwl_txq_update_write_ptr(priv, txq);
1322         spin_unlock_irqrestore(&priv->lock, flags);
1323
1324         if (rc)
1325                 return rc;
1326
1327         if ((iwl_queue_space(q) < q->high_mark)
1328             && priv->mac80211_registered) {
1329                 if (wait_write_ptr) {
1330                         spin_lock_irqsave(&priv->lock, flags);
1331                         txq->need_update = 1;
1332                         iwl_txq_update_write_ptr(priv, txq);
1333                         spin_unlock_irqrestore(&priv->lock, flags);
1334                 }
1335
1336                 ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
1337         }
1338
1339         return 0;
1340
1341 drop_unlock:
1342         spin_unlock_irqrestore(&priv->lock, flags);
1343 drop:
1344         return -1;
1345 }
1346
1347 static void iwl3945_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
1348 {
1349         unsigned long flags;
1350
1351         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
1352                 return;
1353
1354         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
1355                           disable_radio ? "OFF" : "ON");
1356
1357         if (disable_radio) {
1358                 iwl_scan_cancel(priv);
1359                 /* FIXME: This is a workaround for AP */
1360                 if (priv->iw_mode != NL80211_IFTYPE_AP) {
1361                         spin_lock_irqsave(&priv->lock, flags);
1362                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1363                                     CSR_UCODE_SW_BIT_RFKILL);
1364                         spin_unlock_irqrestore(&priv->lock, flags);
1365                         iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
1366                         set_bit(STATUS_RF_KILL_SW, &priv->status);
1367                 }
1368                 return;
1369         }
1370
1371         spin_lock_irqsave(&priv->lock, flags);
1372         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1373
1374         clear_bit(STATUS_RF_KILL_SW, &priv->status);
1375         spin_unlock_irqrestore(&priv->lock, flags);
1376
1377         /* wake up ucode */
1378         msleep(10);
1379
1380         spin_lock_irqsave(&priv->lock, flags);
1381         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1382         if (!iwl_grab_nic_access(priv))
1383                 iwl_release_nic_access(priv);
1384         spin_unlock_irqrestore(&priv->lock, flags);
1385
1386         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
1387                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
1388                                   "disabled by HW switch\n");
1389                 return;
1390         }
1391
1392         if (priv->is_open)
1393                 queue_work(priv->workqueue, &priv->restart);
1394         return;
1395 }
1396
1397 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
1398
1399 #include "iwl-spectrum.h"
1400
1401 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
1402 #define BEACON_TIME_MASK_HIGH   0xFF000000
1403 #define TIME_UNIT               1024
1404
1405 /*
1406  * extended beacon time format
1407  * time in usec will be changed into a 32-bit value in 8:24 format
1408  * the high 1 byte is the beacon counts
1409  * the lower 3 bytes is the time in usec within one beacon interval
1410  */
1411
1412 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
1413 {
1414         u32 quot;
1415         u32 rem;
1416         u32 interval = beacon_interval * 1024;
1417
1418         if (!interval || !usec)
1419                 return 0;
1420
1421         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
1422         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
1423
1424         return (quot << 24) + rem;
1425 }
1426
1427 /* base is usually what we get from ucode with each received frame,
1428  * the same as HW timer counter counting down
1429  */
1430
1431 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
1432 {
1433         u32 base_low = base & BEACON_TIME_MASK_LOW;
1434         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
1435         u32 interval = beacon_interval * TIME_UNIT;
1436         u32 res = (base & BEACON_TIME_MASK_HIGH) +
1437             (addon & BEACON_TIME_MASK_HIGH);
1438
1439         if (base_low > addon_low)
1440                 res += base_low - addon_low;
1441         else if (base_low < addon_low) {
1442                 res += interval + base_low - addon_low;
1443                 res += (1 << 24);
1444         } else
1445                 res += (1 << 24);
1446
1447         return cpu_to_le32(res);
1448 }
1449
1450 static int iwl3945_get_measurement(struct iwl_priv *priv,
1451                                struct ieee80211_measurement_params *params,
1452                                u8 type)
1453 {
1454         struct iwl_spectrum_cmd spectrum;
1455         struct iwl_rx_packet *res;
1456         struct iwl_host_cmd cmd = {
1457                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
1458                 .data = (void *)&spectrum,
1459                 .meta.flags = CMD_WANT_SKB,
1460         };
1461         u32 add_time = le64_to_cpu(params->start_time);
1462         int rc;
1463         int spectrum_resp_status;
1464         int duration = le16_to_cpu(params->duration);
1465
1466         if (iwl_is_associated(priv))
1467                 add_time =
1468                     iwl3945_usecs_to_beacons(
1469                         le64_to_cpu(params->start_time) - priv->last_tsf,
1470                         le16_to_cpu(priv->rxon_timing.beacon_interval));
1471
1472         memset(&spectrum, 0, sizeof(spectrum));
1473
1474         spectrum.channel_count = cpu_to_le16(1);
1475         spectrum.flags =
1476             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
1477         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
1478         cmd.len = sizeof(spectrum);
1479         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
1480
1481         if (iwl_is_associated(priv))
1482                 spectrum.start_time =
1483                     iwl3945_add_beacon_time(priv->last_beacon_time,
1484                                 add_time,
1485                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1486         else
1487                 spectrum.start_time = 0;
1488
1489         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
1490         spectrum.channels[0].channel = params->channel;
1491         spectrum.channels[0].type = type;
1492         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
1493                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
1494                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
1495
1496         rc = iwl_send_cmd_sync(priv, &cmd);
1497         if (rc)
1498                 return rc;
1499
1500         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1501         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1502                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
1503                 rc = -EIO;
1504         }
1505
1506         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
1507         switch (spectrum_resp_status) {
1508         case 0:         /* Command will be handled */
1509                 if (res->u.spectrum.id != 0xff) {
1510                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
1511                                                 res->u.spectrum.id);
1512                         priv->measurement_status &= ~MEASUREMENT_READY;
1513                 }
1514                 priv->measurement_status |= MEASUREMENT_ACTIVE;
1515                 rc = 0;
1516                 break;
1517
1518         case 1:         /* Command will not be handled */
1519                 rc = -EAGAIN;
1520                 break;
1521         }
1522
1523         dev_kfree_skb_any(cmd.meta.u.skb);
1524
1525         return rc;
1526 }
1527 #endif
1528
1529 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
1530                                struct iwl_rx_mem_buffer *rxb)
1531 {
1532         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1533         struct iwl_alive_resp *palive;
1534         struct delayed_work *pwork;
1535
1536         palive = &pkt->u.alive_frame;
1537
1538         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
1539                        "0x%01X 0x%01X\n",
1540                        palive->is_valid, palive->ver_type,
1541                        palive->ver_subtype);
1542
1543         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
1544                 IWL_DEBUG_INFO("Initialization Alive received.\n");
1545                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
1546                        sizeof(struct iwl_alive_resp));
1547                 pwork = &priv->init_alive_start;
1548         } else {
1549                 IWL_DEBUG_INFO("Runtime Alive received.\n");
1550                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
1551                        sizeof(struct iwl_alive_resp));
1552                 pwork = &priv->alive_start;
1553                 iwl3945_disable_events(priv);
1554         }
1555
1556         /* We delay the ALIVE response by 5ms to
1557          * give the HW RF Kill time to activate... */
1558         if (palive->is_valid == UCODE_VALID_OK)
1559                 queue_delayed_work(priv->workqueue, pwork,
1560                                    msecs_to_jiffies(5));
1561         else
1562                 IWL_WARN(priv, "uCode did not respond OK.\n");
1563 }
1564
1565 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
1566                                  struct iwl_rx_mem_buffer *rxb)
1567 {
1568 #ifdef CONFIG_IWLWIFI_DEBUG
1569         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1570 #endif
1571
1572         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
1573         return;
1574 }
1575
1576 static void iwl3945_rx_reply_error(struct iwl_priv *priv,
1577                                struct iwl_rx_mem_buffer *rxb)
1578 {
1579         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1580
1581         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1582                 "seq 0x%04X ser 0x%08X\n",
1583                 le32_to_cpu(pkt->u.err_resp.error_type),
1584                 get_cmd_string(pkt->u.err_resp.cmd_id),
1585                 pkt->u.err_resp.cmd_id,
1586                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1587                 le32_to_cpu(pkt->u.err_resp.error_info));
1588 }
1589
1590 static void iwl3945_rx_spectrum_measure_notif(struct iwl_priv *priv,
1591                                           struct iwl_rx_mem_buffer *rxb)
1592 {
1593 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
1594         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1595         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
1596
1597         if (!report->state) {
1598                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
1599                           "Spectrum Measure Notification: Start\n");
1600                 return;
1601         }
1602
1603         memcpy(&priv->measure_report, report, sizeof(*report));
1604         priv->measurement_status |= MEASUREMENT_READY;
1605 #endif
1606 }
1607
1608 static void iwl3945_rx_pm_sleep_notif(struct iwl_priv *priv,
1609                                   struct iwl_rx_mem_buffer *rxb)
1610 {
1611 #ifdef CONFIG_IWLWIFI_DEBUG
1612         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1613         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1614         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
1615                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1616 #endif
1617 }
1618
1619 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1620                                              struct iwl_rx_mem_buffer *rxb)
1621 {
1622         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1623         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
1624                         "notification for %s:\n",
1625                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
1626         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw,
1627                            le32_to_cpu(pkt->len));
1628 }
1629
1630 static void iwl3945_bg_beacon_update(struct work_struct *work)
1631 {
1632         struct iwl_priv *priv =
1633                 container_of(work, struct iwl_priv, beacon_update);
1634         struct sk_buff *beacon;
1635
1636         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
1637         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
1638
1639         if (!beacon) {
1640                 IWL_ERR(priv, "update beacon failed\n");
1641                 return;
1642         }
1643
1644         mutex_lock(&priv->mutex);
1645         /* new beacon skb is allocated every time; dispose previous.*/
1646         if (priv->ibss_beacon)
1647                 dev_kfree_skb(priv->ibss_beacon);
1648
1649         priv->ibss_beacon = beacon;
1650         mutex_unlock(&priv->mutex);
1651
1652         iwl3945_send_beacon_cmd(priv);
1653 }
1654
1655 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
1656                                 struct iwl_rx_mem_buffer *rxb)
1657 {
1658 #ifdef CONFIG_IWLWIFI_DEBUG
1659         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1660         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
1661         u8 rate = beacon->beacon_notify_hdr.rate;
1662
1663         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
1664                 "tsf %d %d rate %d\n",
1665                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
1666                 beacon->beacon_notify_hdr.failure_frame,
1667                 le32_to_cpu(beacon->ibss_mgr_status),
1668                 le32_to_cpu(beacon->high_tsf),
1669                 le32_to_cpu(beacon->low_tsf), rate);
1670 #endif
1671
1672         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
1673             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
1674                 queue_work(priv->workqueue, &priv->beacon_update);
1675 }
1676
1677 /* Service response to REPLY_SCAN_CMD (0x80) */
1678 static void iwl3945_rx_reply_scan(struct iwl_priv *priv,
1679                               struct iwl_rx_mem_buffer *rxb)
1680 {
1681 #ifdef CONFIG_IWLWIFI_DEBUG
1682         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1683         struct iwl_scanreq_notification *notif =
1684             (struct iwl_scanreq_notification *)pkt->u.raw;
1685
1686         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
1687 #endif
1688 }
1689
1690 /* Service SCAN_START_NOTIFICATION (0x82) */
1691 static void iwl3945_rx_scan_start_notif(struct iwl_priv *priv,
1692                                     struct iwl_rx_mem_buffer *rxb)
1693 {
1694         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1695         struct iwl_scanstart_notification *notif =
1696             (struct iwl_scanstart_notification *)pkt->u.raw;
1697         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1698         IWL_DEBUG_SCAN("Scan start: "
1699                        "%d [802.11%s] "
1700                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
1701                        notif->channel,
1702                        notif->band ? "bg" : "a",
1703                        notif->tsf_high,
1704                        notif->tsf_low, notif->status, notif->beacon_timer);
1705 }
1706
1707 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
1708 static void iwl3945_rx_scan_results_notif(struct iwl_priv *priv,
1709                                       struct iwl_rx_mem_buffer *rxb)
1710 {
1711 #ifdef CONFIG_IWLWIFI_DEBUG
1712         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1713         struct iwl_scanresults_notification *notif =
1714             (struct iwl_scanresults_notification *)pkt->u.raw;
1715 #endif
1716
1717         IWL_DEBUG_SCAN("Scan ch.res: "
1718                        "%d [802.11%s] "
1719                        "(TSF: 0x%08X:%08X) - %d "
1720                        "elapsed=%lu usec (%dms since last)\n",
1721                        notif->channel,
1722                        notif->band ? "bg" : "a",
1723                        le32_to_cpu(notif->tsf_high),
1724                        le32_to_cpu(notif->tsf_low),
1725                        le32_to_cpu(notif->statistics[0]),
1726                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
1727                        jiffies_to_msecs(elapsed_jiffies
1728                                         (priv->last_scan_jiffies, jiffies)));
1729
1730         priv->last_scan_jiffies = jiffies;
1731         priv->next_scan_jiffies = 0;
1732 }
1733
1734 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
1735 static void iwl3945_rx_scan_complete_notif(struct iwl_priv *priv,
1736                                        struct iwl_rx_mem_buffer *rxb)
1737 {
1738 #ifdef CONFIG_IWLWIFI_DEBUG
1739         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1740         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1741 #endif
1742
1743         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1744                        scan_notif->scanned_channels,
1745                        scan_notif->tsf_low,
1746                        scan_notif->tsf_high, scan_notif->status);
1747
1748         /* The HW is no longer scanning */
1749         clear_bit(STATUS_SCAN_HW, &priv->status);
1750
1751         /* The scan completion notification came in, so kill that timer... */
1752         cancel_delayed_work(&priv->scan_check);
1753
1754         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
1755                        (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
1756                                                         "2.4" : "5.2",
1757                        jiffies_to_msecs(elapsed_jiffies
1758                                         (priv->scan_pass_start, jiffies)));
1759
1760         /* Remove this scanned band from the list of pending
1761          * bands to scan, band G precedes A in order of scanning
1762          * as seen in iwl3945_bg_request_scan */
1763         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
1764                 priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
1765         else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
1766                 priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
1767
1768         /* If a request to abort was given, or the scan did not succeed
1769          * then we reset the scan state machine and terminate,
1770          * re-queuing another scan if one has been requested */
1771         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1772                 IWL_DEBUG_INFO("Aborted scan completed.\n");
1773                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1774         } else {
1775                 /* If there are more bands on this scan pass reschedule */
1776                 if (priv->scan_bands > 0)
1777                         goto reschedule;
1778         }
1779
1780         priv->last_scan_jiffies = jiffies;
1781         priv->next_scan_jiffies = 0;
1782         IWL_DEBUG_INFO("Setting scan to off\n");
1783
1784         clear_bit(STATUS_SCANNING, &priv->status);
1785
1786         IWL_DEBUG_INFO("Scan took %dms\n",
1787                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
1788
1789         queue_work(priv->workqueue, &priv->scan_completed);
1790
1791         return;
1792
1793 reschedule:
1794         priv->scan_pass_start = jiffies;
1795         queue_work(priv->workqueue, &priv->request_scan);
1796 }
1797
1798 /* Handle notification from uCode that card's power state is changing
1799  * due to software, hardware, or critical temperature RFKILL */
1800 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
1801                                     struct iwl_rx_mem_buffer *rxb)
1802 {
1803         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1804         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
1805         unsigned long status = priv->status;
1806
1807         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
1808                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1809                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1810
1811         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1812                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1813
1814         if (flags & HW_CARD_DISABLED)
1815                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1816         else
1817                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1818
1819
1820         if (flags & SW_CARD_DISABLED)
1821                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1822         else
1823                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1824
1825         iwl_scan_cancel(priv);
1826
1827         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1828              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1829             (test_bit(STATUS_RF_KILL_SW, &status) !=
1830              test_bit(STATUS_RF_KILL_SW, &priv->status)))
1831                 queue_work(priv->workqueue, &priv->rf_kill);
1832         else
1833                 wake_up_interruptible(&priv->wait_command_queue);
1834 }
1835
1836 /**
1837  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
1838  *
1839  * Setup the RX handlers for each of the reply types sent from the uCode
1840  * to the host.
1841  *
1842  * This function chains into the hardware specific files for them to setup
1843  * any hardware specific handlers as well.
1844  */
1845 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
1846 {
1847         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
1848         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
1849         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
1850         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1851         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1852             iwl3945_rx_spectrum_measure_notif;
1853         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
1854         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1855             iwl3945_rx_pm_debug_statistics_notif;
1856         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
1857
1858         /*
1859          * The same handler is used for both the REPLY to a discrete
1860          * statistics request from the host as well as for the periodic
1861          * statistics notifications (after received beacons) from the uCode.
1862          */
1863         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
1864         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
1865
1866         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
1867         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
1868         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
1869             iwl3945_rx_scan_results_notif;
1870         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
1871             iwl3945_rx_scan_complete_notif;
1872         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
1873
1874         /* Set up hardware specific Rx handlers */
1875         iwl3945_hw_rx_handler_setup(priv);
1876 }
1877
1878 /**
1879  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
1880  * When FW advances 'R' index, all entries between old and new 'R' index
1881  * need to be reclaimed.
1882  */
1883 static void iwl3945_cmd_queue_reclaim(struct iwl_priv *priv,
1884                                       int txq_id, int index)
1885 {
1886         struct iwl_tx_queue *txq = &priv->txq[txq_id];
1887         struct iwl_queue *q = &txq->q;
1888         int nfreed = 0;
1889
1890         if ((index >= q->n_bd) || (iwl_queue_used(q, index) == 0)) {
1891                 IWL_ERR(priv, "Read index for DMA queue txq id (%d), index %d, "
1892                           "is out of range [0-%d] %d %d.\n", txq_id,
1893                           index, q->n_bd, q->write_ptr, q->read_ptr);
1894                 return;
1895         }
1896
1897         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
1898                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
1899                 if (nfreed > 1) {
1900                         IWL_ERR(priv, "HCMD skipped: index (%d) %d %d\n", index,
1901                                         q->write_ptr, q->read_ptr);
1902                         queue_work(priv->workqueue, &priv->restart);
1903                         break;
1904                 }
1905                 nfreed++;
1906         }
1907 }
1908
1909
1910 /**
1911  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
1912  * @rxb: Rx buffer to reclaim
1913  *
1914  * If an Rx buffer has an async callback associated with it the callback
1915  * will be executed.  The attached skb (if present) will only be freed
1916  * if the callback returns 1
1917  */
1918 static void iwl3945_tx_cmd_complete(struct iwl_priv *priv,
1919                                 struct iwl_rx_mem_buffer *rxb)
1920 {
1921         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1922         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1923         int txq_id = SEQ_TO_QUEUE(sequence);
1924         int index = SEQ_TO_INDEX(sequence);
1925         int huge =  !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
1926         int cmd_index;
1927         struct iwl_cmd *cmd;
1928
1929         if (WARN(txq_id != IWL_CMD_QUEUE_NUM,
1930                  "wrong command queue %d, sequence 0x%X readp=%d writep=%d\n",
1931                   txq_id, sequence,
1932                   priv->txq[IWL_CMD_QUEUE_NUM].q.read_ptr,
1933                   priv->txq[IWL_CMD_QUEUE_NUM].q.write_ptr)) {
1934                 iwl_print_hex_dump(priv, IWL_DL_INFO , rxb, 32);
1935                 return;
1936         }
1937
1938         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
1939         cmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
1940
1941         /* Input error checking is done when commands are added to queue. */
1942         if (cmd->meta.flags & CMD_WANT_SKB) {
1943                 cmd->meta.source->u.skb = rxb->skb;
1944                 rxb->skb = NULL;
1945         } else if (cmd->meta.u.callback &&
1946                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
1947                 rxb->skb = NULL;
1948
1949         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
1950
1951         if (!(cmd->meta.flags & CMD_ASYNC)) {
1952                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1953                 wake_up_interruptible(&priv->wait_command_queue);
1954         }
1955 }
1956
1957 /************************** RX-FUNCTIONS ****************************/
1958 /*
1959  * Rx theory of operation
1960  *
1961  * The host allocates 32 DMA target addresses and passes the host address
1962  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1963  * 0 to 31
1964  *
1965  * Rx Queue Indexes
1966  * The host/firmware share two index registers for managing the Rx buffers.
1967  *
1968  * The READ index maps to the first position that the firmware may be writing
1969  * to -- the driver can read up to (but not including) this position and get
1970  * good data.
1971  * The READ index is managed by the firmware once the card is enabled.
1972  *
1973  * The WRITE index maps to the last position the driver has read from -- the
1974  * position preceding WRITE is the last slot the firmware can place a packet.
1975  *
1976  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1977  * WRITE = READ.
1978  *
1979  * During initialization, the host sets up the READ queue position to the first
1980  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1981  *
1982  * When the firmware places a packet in a buffer, it will advance the READ index
1983  * and fire the RX interrupt.  The driver can then query the READ index and
1984  * process as many packets as possible, moving the WRITE index forward as it
1985  * resets the Rx queue buffers with new memory.
1986  *
1987  * The management in the driver is as follows:
1988  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1989  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1990  *   to replenish the iwl->rxq->rx_free.
1991  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1992  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1993  *   'processed' and 'read' driver indexes as well)
1994  * + A received packet is processed and handed to the kernel network stack,
1995  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1996  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1997  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1998  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1999  *   were enough free buffers and RX_STALLED is set it is cleared.
2000  *
2001  *
2002  * Driver sequence:
2003  *
2004  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2005  *                            iwl3945_rx_queue_restock
2006  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
2007  *                            queue, updates firmware pointers, and updates
2008  *                            the WRITE index.  If insufficient rx_free buffers
2009  *                            are available, schedules iwl3945_rx_replenish
2010  *
2011  * -- enable interrupts --
2012  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
2013  *                            READ INDEX, detaching the SKB from the pool.
2014  *                            Moves the packet buffer from queue to rx_used.
2015  *                            Calls iwl3945_rx_queue_restock to refill any empty
2016  *                            slots.
2017  * ...
2018  *
2019  */
2020
2021 /**
2022  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
2023  */
2024 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
2025                                           dma_addr_t dma_addr)
2026 {
2027         return cpu_to_le32((u32)dma_addr);
2028 }
2029
2030 /**
2031  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
2032  *
2033  * If there are slots in the RX queue that need to be restocked,
2034  * and we have free pre-allocated buffers, fill the ranks as much
2035  * as we can, pulling from rx_free.
2036  *
2037  * This moves the 'write' index forward to catch up with 'processed', and
2038  * also updates the memory address in the firmware to reference the new
2039  * target buffer.
2040  */
2041 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
2042 {
2043         struct iwl_rx_queue *rxq = &priv->rxq;
2044         struct list_head *element;
2045         struct iwl_rx_mem_buffer *rxb;
2046         unsigned long flags;
2047         int write, rc;
2048
2049         spin_lock_irqsave(&rxq->lock, flags);
2050         write = rxq->write & ~0x7;
2051         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
2052                 /* Get next free Rx buffer, remove from free list */
2053                 element = rxq->rx_free.next;
2054                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
2055                 list_del(element);
2056
2057                 /* Point to Rx buffer via next RBD in circular buffer */
2058                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
2059                 rxq->queue[rxq->write] = rxb;
2060                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
2061                 rxq->free_count--;
2062         }
2063         spin_unlock_irqrestore(&rxq->lock, flags);
2064         /* If the pre-allocated buffer pool is dropping low, schedule to
2065          * refill it */
2066         if (rxq->free_count <= RX_LOW_WATERMARK)
2067                 queue_work(priv->workqueue, &priv->rx_replenish);
2068
2069
2070         /* If we've added more space for the firmware to place data, tell it.
2071          * Increment device's write pointer in multiples of 8. */
2072         if ((write != (rxq->write & ~0x7))
2073             || (abs(rxq->write - rxq->read) > 7)) {
2074                 spin_lock_irqsave(&rxq->lock, flags);
2075                 rxq->need_update = 1;
2076                 spin_unlock_irqrestore(&rxq->lock, flags);
2077                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
2078                 if (rc)
2079                         return rc;
2080         }
2081
2082         return 0;
2083 }
2084
2085 /**
2086  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
2087  *
2088  * When moving to rx_free an SKB is allocated for the slot.
2089  *
2090  * Also restock the Rx queue via iwl3945_rx_queue_restock.
2091  * This is called as a scheduled work item (except for during initialization)
2092  */
2093 static void iwl3945_rx_allocate(struct iwl_priv *priv)
2094 {
2095         struct iwl_rx_queue *rxq = &priv->rxq;
2096         struct list_head *element;
2097         struct iwl_rx_mem_buffer *rxb;
2098         unsigned long flags;
2099         spin_lock_irqsave(&rxq->lock, flags);
2100         while (!list_empty(&rxq->rx_used)) {
2101                 element = rxq->rx_used.next;
2102                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
2103
2104                 /* Alloc a new receive buffer */
2105                 rxb->skb =
2106                     alloc_skb(priv->hw_params.rx_buf_size,
2107                                 __GFP_NOWARN | GFP_ATOMIC);
2108                 if (!rxb->skb) {
2109                         if (net_ratelimit())
2110                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
2111                         /* We don't reschedule replenish work here -- we will
2112                          * call the restock method and if it still needs
2113                          * more buffers it will schedule replenish */
2114                         break;
2115                 }
2116
2117                 /* If radiotap head is required, reserve some headroom here.
2118                  * The physical head count is a variable rx_stats->phy_count.
2119                  * We reserve 4 bytes here. Plus these extra bytes, the
2120                  * headroom of the physical head should be enough for the
2121                  * radiotap head that iwl3945 supported. See iwl3945_rt.
2122                  */
2123                 skb_reserve(rxb->skb, 4);
2124
2125                 priv->alloc_rxb_skb++;
2126                 list_del(element);
2127
2128                 /* Get physical address of RB/SKB */
2129                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
2130                                                 rxb->skb->data,
2131                                                 priv->hw_params.rx_buf_size,
2132                                                 PCI_DMA_FROMDEVICE);
2133                 list_add_tail(&rxb->list, &rxq->rx_free);
2134                 rxq->free_count++;
2135         }
2136         spin_unlock_irqrestore(&rxq->lock, flags);
2137 }
2138
2139 /*
2140  * this should be called while priv->lock is locked
2141  */
2142 static void __iwl3945_rx_replenish(void *data)
2143 {
2144         struct iwl_priv *priv = data;
2145
2146         iwl3945_rx_allocate(priv);
2147         iwl3945_rx_queue_restock(priv);
2148 }
2149
2150
2151 void iwl3945_rx_replenish(void *data)
2152 {
2153         struct iwl_priv *priv = data;
2154         unsigned long flags;
2155
2156         iwl3945_rx_allocate(priv);
2157
2158         spin_lock_irqsave(&priv->lock, flags);
2159         iwl3945_rx_queue_restock(priv);
2160         spin_unlock_irqrestore(&priv->lock, flags);
2161 }
2162
2163 /* Convert linear signal-to-noise ratio into dB */
2164 static u8 ratio2dB[100] = {
2165 /*       0   1   2   3   4   5   6   7   8   9 */
2166          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
2167         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
2168         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
2169         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
2170         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
2171         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
2172         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
2173         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
2174         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
2175         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
2176 };
2177
2178 /* Calculates a relative dB value from a ratio of linear
2179  *   (i.e. not dB) signal levels.
2180  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
2181 int iwl3945_calc_db_from_ratio(int sig_ratio)
2182 {
2183         /* 1000:1 or higher just report as 60 dB */
2184         if (sig_ratio >= 1000)
2185                 return 60;
2186
2187         /* 100:1 or higher, divide by 10 and use table,
2188          *   add 20 dB to make up for divide by 10 */
2189         if (sig_ratio >= 100)
2190                 return 20 + (int)ratio2dB[sig_ratio/10];
2191
2192         /* We shouldn't see this */
2193         if (sig_ratio < 1)
2194                 return 0;
2195
2196         /* Use table for ratios 1:1 - 99:1 */
2197         return (int)ratio2dB[sig_ratio];
2198 }
2199
2200 #define PERFECT_RSSI (-20) /* dBm */
2201 #define WORST_RSSI (-95)   /* dBm */
2202 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
2203
2204 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
2205  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
2206  *   about formulas used below. */
2207 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
2208 {
2209         int sig_qual;
2210         int degradation = PERFECT_RSSI - rssi_dbm;
2211
2212         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
2213          * as indicator; formula is (signal dbm - noise dbm).
2214          * SNR at or above 40 is a great signal (100%).
2215          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
2216          * Weakest usable signal is usually 10 - 15 dB SNR. */
2217         if (noise_dbm) {
2218                 if (rssi_dbm - noise_dbm >= 40)
2219                         return 100;
2220                 else if (rssi_dbm < noise_dbm)
2221                         return 0;
2222                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
2223
2224         /* Else use just the signal level.
2225          * This formula is a least squares fit of data points collected and
2226          *   compared with a reference system that had a percentage (%) display
2227          *   for signal quality. */
2228         } else
2229                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
2230                             (15 * RSSI_RANGE + 62 * degradation)) /
2231                            (RSSI_RANGE * RSSI_RANGE);
2232
2233         if (sig_qual > 100)
2234                 sig_qual = 100;
2235         else if (sig_qual < 1)
2236                 sig_qual = 0;
2237
2238         return sig_qual;
2239 }
2240
2241 /**
2242  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
2243  *
2244  * Uses the priv->rx_handlers callback function array to invoke
2245  * the appropriate handlers, including command responses,
2246  * frame-received notifications, and other notifications.
2247  */
2248 static void iwl3945_rx_handle(struct iwl_priv *priv)
2249 {
2250         struct iwl_rx_mem_buffer *rxb;
2251         struct iwl_rx_packet *pkt;
2252         struct iwl_rx_queue *rxq = &priv->rxq;
2253         u32 r, i;
2254         int reclaim;
2255         unsigned long flags;
2256         u8 fill_rx = 0;
2257         u32 count = 8;
2258
2259         /* uCode's read index (stored in shared DRAM) indicates the last Rx
2260          * buffer that the driver may process (last buffer filled by ucode). */
2261         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
2262         i = rxq->read;
2263
2264         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
2265                 fill_rx = 1;
2266         /* Rx interrupt, but nothing sent from uCode */
2267         if (i == r)
2268                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
2269
2270         while (i != r) {
2271                 rxb = rxq->queue[i];
2272
2273                 /* If an RXB doesn't have a Rx queue slot associated with it,
2274                  * then a bug has been introduced in the queue refilling
2275                  * routines -- catch it here */
2276                 BUG_ON(rxb == NULL);
2277
2278                 rxq->queue[i] = NULL;
2279
2280                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->real_dma_addr,
2281                                             priv->hw_params.rx_buf_size,
2282                                             PCI_DMA_FROMDEVICE);
2283                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
2284
2285                 /* Reclaim a command buffer only if this packet is a response
2286                  *   to a (driver-originated) command.
2287                  * If the packet (e.g. Rx frame) originated from uCode,
2288                  *   there is no command buffer to reclaim.
2289                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
2290                  *   but apparently a few don't get set; catch them here. */
2291                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
2292                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
2293                         (pkt->hdr.cmd != REPLY_TX);
2294
2295                 /* Based on type of command response or notification,
2296                  *   handle those that need handling via function in
2297                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
2298                 if (priv->rx_handlers[pkt->hdr.cmd]) {
2299                         IWL_DEBUG(IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
2300                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
2301                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
2302                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
2303                 } else {
2304                         /* No handling needed */
2305                         IWL_DEBUG(IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
2306                                 "r %d i %d No handler needed for %s, 0x%02x\n",
2307                                 r, i, get_cmd_string(pkt->hdr.cmd),
2308                                 pkt->hdr.cmd);
2309                 }
2310
2311                 if (reclaim) {
2312                         /* Invoke any callbacks, transfer the skb to caller, and
2313                          * fire off the (possibly) blocking iwl_send_cmd()
2314                          * as we reclaim the driver command queue */
2315                         if (rxb && rxb->skb)
2316                                 iwl3945_tx_cmd_complete(priv, rxb);
2317                         else
2318                                 IWL_WARN(priv, "Claim null rxb?\n");
2319                 }
2320
2321                 /* For now we just don't re-use anything.  We can tweak this
2322                  * later to try and re-use notification packets and SKBs that
2323                  * fail to Rx correctly */
2324                 if (rxb->skb != NULL) {
2325                         priv->alloc_rxb_skb--;
2326                         dev_kfree_skb_any(rxb->skb);
2327                         rxb->skb = NULL;
2328                 }
2329
2330                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
2331                                 priv->hw_params.rx_buf_size,
2332                                 PCI_DMA_FROMDEVICE);
2333                 spin_lock_irqsave(&rxq->lock, flags);
2334                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
2335                 spin_unlock_irqrestore(&rxq->lock, flags);
2336                 i = (i + 1) & RX_QUEUE_MASK;
2337                 /* If there are a lot of unused frames,
2338                  * restock the Rx queue so ucode won't assert. */
2339                 if (fill_rx) {
2340                         count++;
2341                         if (count >= 8) {
2342                                 priv->rxq.read = i;
2343                                 __iwl3945_rx_replenish(priv);
2344                                 count = 0;
2345                         }
2346                 }
2347         }
2348
2349         /* Backtrack one entry */
2350         priv->rxq.read = i;
2351         iwl3945_rx_queue_restock(priv);
2352 }
2353
2354 static void iwl3945_enable_interrupts(struct iwl_priv *priv)
2355 {
2356         IWL_DEBUG_ISR("Enabling interrupts\n");
2357         set_bit(STATUS_INT_ENABLED, &priv->status);
2358         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
2359 }
2360
2361
2362 /* call this function to flush any scheduled tasklet */
2363 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
2364 {
2365         /* wait to make sure we flush pending tasklet*/
2366         synchronize_irq(priv->pci_dev->irq);
2367         tasklet_kill(&priv->irq_tasklet);
2368 }
2369
2370
2371 static inline void iwl3945_disable_interrupts(struct iwl_priv *priv)
2372 {
2373         clear_bit(STATUS_INT_ENABLED, &priv->status);
2374
2375         /* disable interrupts from uCode/NIC to host */
2376         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2377
2378         /* acknowledge/clear/reset any interrupts still pending
2379          * from uCode or flow handler (Rx/Tx DMA) */
2380         iwl_write32(priv, CSR_INT, 0xffffffff);
2381         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
2382         IWL_DEBUG_ISR("Disabled interrupts\n");
2383 }
2384
2385 static const char *desc_lookup(int i)
2386 {
2387         switch (i) {
2388         case 1:
2389                 return "FAIL";
2390         case 2:
2391                 return "BAD_PARAM";
2392         case 3:
2393                 return "BAD_CHECKSUM";
2394         case 4:
2395                 return "NMI_INTERRUPT";
2396         case 5:
2397                 return "SYSASSERT";
2398         case 6:
2399                 return "FATAL_ERROR";
2400         }
2401
2402         return "UNKNOWN";
2403 }
2404
2405 #define ERROR_START_OFFSET  (1 * sizeof(u32))
2406 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
2407
2408 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
2409 {
2410         u32 i;
2411         u32 desc, time, count, base, data1;
2412         u32 blink1, blink2, ilink1, ilink2;
2413         int rc;
2414
2415         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
2416
2417         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
2418                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
2419                 return;
2420         }
2421
2422         rc = iwl_grab_nic_access(priv);
2423         if (rc) {
2424                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
2425                 return;
2426         }
2427
2428         count = iwl_read_targ_mem(priv, base);
2429
2430         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
2431                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
2432                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
2433                         priv->status, count);
2434         }
2435
2436         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
2437                   "ilink1  nmiPC   Line\n");
2438         for (i = ERROR_START_OFFSET;
2439              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
2440              i += ERROR_ELEM_SIZE) {
2441                 desc = iwl_read_targ_mem(priv, base + i);
2442                 time =
2443                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
2444                 blink1 =
2445                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
2446                 blink2 =
2447                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
2448                 ilink1 =
2449                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
2450                 ilink2 =
2451                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
2452                 data1 =
2453                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
2454
2455                 IWL_ERR(priv,
2456                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
2457                         desc_lookup(desc), desc, time, blink1, blink2,
2458                         ilink1, ilink2, data1);
2459         }
2460
2461         iwl_release_nic_access(priv);
2462
2463 }
2464
2465 #define EVENT_START_OFFSET  (6 * sizeof(u32))
2466
2467 /**
2468  * iwl3945_print_event_log - Dump error event log to syslog
2469  *
2470  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
2471  */
2472 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
2473                                 u32 num_events, u32 mode)
2474 {
2475         u32 i;
2476         u32 base;       /* SRAM byte address of event log header */
2477         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
2478         u32 ptr;        /* SRAM byte address of log data */
2479         u32 ev, time, data; /* event log data */
2480
2481         if (num_events == 0)
2482                 return;
2483
2484         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2485
2486         if (mode == 0)
2487                 event_size = 2 * sizeof(u32);
2488         else
2489                 event_size = 3 * sizeof(u32);
2490
2491         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
2492
2493         /* "time" is actually "data" for mode 0 (no timestamp).
2494          * place event id # at far right for easier visual parsing. */
2495         for (i = 0; i < num_events; i++) {
2496                 ev = iwl_read_targ_mem(priv, ptr);
2497                 ptr += sizeof(u32);
2498                 time = iwl_read_targ_mem(priv, ptr);
2499                 ptr += sizeof(u32);
2500                 if (mode == 0) {
2501                         /* data, ev */
2502                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
2503                 } else {
2504                         data = iwl_read_targ_mem(priv, ptr);
2505                         ptr += sizeof(u32);
2506                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
2507                 }
2508         }
2509 }
2510
2511 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
2512 {
2513         int rc;
2514         u32 base;       /* SRAM byte address of event log header */
2515         u32 capacity;   /* event log capacity in # entries */
2516         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
2517         u32 num_wraps;  /* # times uCode wrapped to top of log */
2518         u32 next_entry; /* index of next entry to be written by uCode */
2519         u32 size;       /* # entries that we'll print */
2520
2521         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2522         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
2523                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
2524                 return;
2525         }
2526
2527         rc = iwl_grab_nic_access(priv);
2528         if (rc) {
2529                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
2530                 return;
2531         }
2532
2533         /* event log header */
2534         capacity = iwl_read_targ_mem(priv, base);
2535         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
2536         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
2537         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
2538
2539         size = num_wraps ? capacity : next_entry;
2540
2541         /* bail out if nothing in log */
2542         if (size == 0) {
2543                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2544                 iwl_release_nic_access(priv);
2545                 return;
2546         }
2547
2548         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
2549                   size, num_wraps);
2550
2551         /* if uCode has wrapped back to top of log, start at the oldest entry,
2552          * i.e the next one that uCode would fill. */
2553         if (num_wraps)
2554                 iwl3945_print_event_log(priv, next_entry,
2555                                     capacity - next_entry, mode);
2556
2557         /* (then/else) start at top of log */
2558         iwl3945_print_event_log(priv, 0, next_entry, mode);
2559
2560         iwl_release_nic_access(priv);
2561 }
2562
2563 static void iwl3945_error_recovery(struct iwl_priv *priv)
2564 {
2565         unsigned long flags;
2566
2567         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
2568                sizeof(priv->staging_rxon));
2569         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2570         iwl3945_commit_rxon(priv);
2571
2572         iwl3945_add_station(priv, priv->bssid, 1, 0);
2573
2574         spin_lock_irqsave(&priv->lock, flags);
2575         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
2576         priv->error_recovering = 0;
2577         spin_unlock_irqrestore(&priv->lock, flags);
2578 }
2579
2580 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
2581 {
2582         u32 inta, handled = 0;
2583         u32 inta_fh;
2584         unsigned long flags;
2585 #ifdef CONFIG_IWLWIFI_DEBUG
2586         u32 inta_mask;
2587 #endif
2588
2589         spin_lock_irqsave(&priv->lock, flags);
2590
2591         /* Ack/clear/reset pending uCode interrupts.
2592          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
2593          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
2594         inta = iwl_read32(priv, CSR_INT);
2595         iwl_write32(priv, CSR_INT, inta);
2596
2597         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
2598          * Any new interrupts that happen after this, either while we're
2599          * in this tasklet, or later, will show up in next ISR/tasklet. */
2600         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2601         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
2602
2603 #ifdef CONFIG_IWLWIFI_DEBUG
2604         if (priv->debug_level & IWL_DL_ISR) {
2605                 /* just for debug */
2606                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2607                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2608                               inta, inta_mask, inta_fh);
2609         }
2610 #endif
2611
2612         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
2613          * atomic, make sure that inta covers all the interrupts that
2614          * we've discovered, even if FH interrupt came in just after
2615          * reading CSR_INT. */
2616         if (inta_fh & CSR39_FH_INT_RX_MASK)
2617                 inta |= CSR_INT_BIT_FH_RX;
2618         if (inta_fh & CSR39_FH_INT_TX_MASK)
2619                 inta |= CSR_INT_BIT_FH_TX;
2620
2621         /* Now service all interrupt bits discovered above. */
2622         if (inta & CSR_INT_BIT_HW_ERR) {
2623                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
2624
2625                 /* Tell the device to stop sending interrupts */
2626                 iwl3945_disable_interrupts(priv);
2627
2628                 iwl_irq_handle_error(priv);
2629
2630                 handled |= CSR_INT_BIT_HW_ERR;
2631
2632                 spin_unlock_irqrestore(&priv->lock, flags);
2633
2634                 return;
2635         }
2636
2637 #ifdef CONFIG_IWLWIFI_DEBUG
2638         if (priv->debug_level & (IWL_DL_ISR)) {
2639                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
2640                 if (inta & CSR_INT_BIT_SCD)
2641                         IWL_DEBUG_ISR("Scheduler finished to transmit "
2642                                       "the frame/frames.\n");
2643
2644                 /* Alive notification via Rx interrupt will do the real work */
2645                 if (inta & CSR_INT_BIT_ALIVE)
2646                         IWL_DEBUG_ISR("Alive interrupt\n");
2647         }
2648 #endif
2649         /* Safely ignore these bits for debug checks below */
2650         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
2651
2652         /* Error detected by uCode */
2653         if (inta & CSR_INT_BIT_SW_ERR) {
2654                 IWL_ERR(priv, "Microcode SW error detected. "
2655                         "Restarting 0x%X.\n", inta);
2656                 iwl_irq_handle_error(priv);
2657                 handled |= CSR_INT_BIT_SW_ERR;
2658         }
2659
2660         /* uCode wakes up after power-down sleep */
2661         if (inta & CSR_INT_BIT_WAKEUP) {
2662                 IWL_DEBUG_ISR("Wakeup interrupt\n");
2663                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
2664                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
2665                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
2666                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
2667                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
2668                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
2669                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
2670
2671                 handled |= CSR_INT_BIT_WAKEUP;
2672         }
2673
2674         /* All uCode command responses, including Tx command responses,
2675          * Rx "responses" (frame-received notification), and other
2676          * notifications from uCode come through here*/
2677         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
2678                 iwl3945_rx_handle(priv);
2679                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
2680         }
2681
2682         if (inta & CSR_INT_BIT_FH_TX) {
2683                 IWL_DEBUG_ISR("Tx interrupt\n");
2684
2685                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
2686                 if (!iwl_grab_nic_access(priv)) {
2687                         iwl_write_direct32(priv, FH39_TCSR_CREDIT
2688                                              (FH39_SRVC_CHNL), 0x0);
2689                         iwl_release_nic_access(priv);
2690                 }
2691                 handled |= CSR_INT_BIT_FH_TX;
2692         }
2693
2694         if (inta & ~handled)
2695                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
2696
2697         if (inta & ~CSR_INI_SET_MASK) {
2698                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
2699                          inta & ~CSR_INI_SET_MASK);
2700                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
2701         }
2702
2703         /* Re-enable all interrupts */
2704         /* only Re-enable if disabled by irq */
2705         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2706                 iwl3945_enable_interrupts(priv);
2707
2708 #ifdef CONFIG_IWLWIFI_DEBUG
2709         if (priv->debug_level & (IWL_DL_ISR)) {
2710                 inta = iwl_read32(priv, CSR_INT);
2711                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2712                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2713                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
2714                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
2715         }
2716 #endif
2717         spin_unlock_irqrestore(&priv->lock, flags);
2718 }
2719
2720 static irqreturn_t iwl3945_isr(int irq, void *data)
2721 {
2722         struct iwl_priv *priv = data;
2723         u32 inta, inta_mask;
2724         u32 inta_fh;
2725         if (!priv)
2726                 return IRQ_NONE;
2727
2728         spin_lock(&priv->lock);
2729
2730         /* Disable (but don't clear!) interrupts here to avoid
2731          *    back-to-back ISRs and sporadic interrupts from our NIC.
2732          * If we have something to service, the tasklet will re-enable ints.
2733          * If we *don't* have something, we'll re-enable before leaving here. */
2734         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
2735         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2736
2737         /* Discover which interrupts are active/pending */
2738         inta = iwl_read32(priv, CSR_INT);
2739         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2740
2741         /* Ignore interrupt if there's nothing in NIC to service.
2742          * This may be due to IRQ shared with another device,
2743          * or due to sporadic interrupts thrown from our NIC. */
2744         if (!inta && !inta_fh) {
2745                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
2746                 goto none;
2747         }
2748
2749         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2750                 /* Hardware disappeared */
2751                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2752                 goto unplugged;
2753         }
2754
2755         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2756                       inta, inta_mask, inta_fh);
2757
2758         inta &= ~CSR_INT_BIT_SCD;
2759
2760         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
2761         if (likely(inta || inta_fh))
2762                 tasklet_schedule(&priv->irq_tasklet);
2763 unplugged:
2764         spin_unlock(&priv->lock);
2765
2766         return IRQ_HANDLED;
2767
2768  none:
2769         /* re-enable interrupts here since we don't have anything to service. */
2770         /* only Re-enable if disabled by irq */
2771         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2772                 iwl3945_enable_interrupts(priv);
2773         spin_unlock(&priv->lock);
2774         return IRQ_NONE;
2775 }
2776
2777 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
2778                                          enum ieee80211_band band,
2779                                      u8 is_active, u8 n_probes,
2780                                      struct iwl3945_scan_channel *scan_ch)
2781 {
2782         const struct ieee80211_channel *channels = NULL;
2783         const struct ieee80211_supported_band *sband;
2784         const struct iwl_channel_info *ch_info;
2785         u16 passive_dwell = 0;
2786         u16 active_dwell = 0;
2787         int added, i;
2788
2789         sband = iwl_get_hw_mode(priv, band);
2790         if (!sband)
2791                 return 0;
2792
2793         channels = sband->channels;
2794
2795         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
2796         passive_dwell = iwl_get_passive_dwell_time(priv, band);
2797
2798         if (passive_dwell <= active_dwell)
2799                 passive_dwell = active_dwell + 1;
2800
2801         for (i = 0, added = 0; i < sband->n_channels; i++) {
2802                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
2803                         continue;
2804
2805                 scan_ch->channel = channels[i].hw_value;
2806
2807                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
2808                 if (!is_channel_valid(ch_info)) {
2809                         IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
2810                                        scan_ch->channel);
2811                         continue;
2812                 }
2813
2814                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
2815                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
2816                 /* If passive , set up for auto-switch
2817                  *  and use long active_dwell time.
2818                  */
2819                 if (!is_active || is_channel_passive(ch_info) ||
2820                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
2821                         scan_ch->type = 0;      /* passive */
2822                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
2823                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
2824                 } else {
2825                         scan_ch->type = 1;      /* active */
2826                 }
2827
2828                 /* Set direct probe bits. These may be used both for active
2829                  * scan channels (probes gets sent right away),
2830                  * or for passive channels (probes get se sent only after
2831                  * hearing clear Rx packet).*/
2832                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
2833                         if (n_probes)
2834                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2835                 } else {
2836                         /* uCode v1 does not allow setting direct probe bits on
2837                          * passive channel. */
2838                         if ((scan_ch->type & 1) && n_probes)
2839                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2840                 }
2841
2842                 /* Set txpower levels to defaults */
2843                 scan_ch->tpc.dsp_atten = 110;
2844                 /* scan_pwr_info->tpc.dsp_atten; */
2845
2846                 /*scan_pwr_info->tpc.tx_gain; */
2847                 if (band == IEEE80211_BAND_5GHZ)
2848                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
2849                 else {
2850                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
2851                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
2852                          * power level:
2853                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
2854                          */
2855                 }
2856
2857                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
2858                                scan_ch->channel,
2859                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
2860                                (scan_ch->type & 1) ?
2861                                active_dwell : passive_dwell);
2862
2863                 scan_ch++;
2864                 added++;
2865         }
2866
2867         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
2868         return added;
2869 }
2870
2871 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
2872                               struct ieee80211_rate *rates)
2873 {
2874         int i;
2875
2876         for (i = 0; i < IWL_RATE_COUNT; i++) {
2877                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
2878                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
2879                 rates[i].hw_value_short = i;
2880                 rates[i].flags = 0;
2881                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
2882                         /*
2883                          * If CCK != 1M then set short preamble rate flag.
2884                          */
2885                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
2886                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
2887                 }
2888         }
2889 }
2890
2891 /******************************************************************************
2892  *
2893  * uCode download functions
2894  *
2895  ******************************************************************************/
2896
2897 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
2898 {
2899         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2900         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2901         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2902         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2903         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2904         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2905 }
2906
2907 /**
2908  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2909  *     looking at all data.
2910  */
2911 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2912 {
2913         u32 val;
2914         u32 save_len = len;
2915         int rc = 0;
2916         u32 errcnt;
2917
2918         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
2919
2920         rc = iwl_grab_nic_access(priv);
2921         if (rc)
2922                 return rc;
2923
2924         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2925                                IWL39_RTC_INST_LOWER_BOUND);
2926
2927         errcnt = 0;
2928         for (; len > 0; len -= sizeof(u32), image++) {
2929                 /* read data comes through single port, auto-incr addr */
2930                 /* NOTE: Use the debugless read so we don't flood kernel log
2931                  * if IWL_DL_IO is set */
2932                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2933                 if (val != le32_to_cpu(*image)) {
2934                         IWL_ERR(priv, "uCode INST section is invalid at "
2935                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2936                                   save_len - len, val, le32_to_cpu(*image));
2937                         rc = -EIO;
2938                         errcnt++;
2939                         if (errcnt >= 20)
2940                                 break;
2941                 }
2942         }
2943
2944         iwl_release_nic_access(priv);
2945
2946         if (!errcnt)
2947                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
2948
2949         return rc;
2950 }
2951
2952
2953 /**
2954  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2955  *   using sample data 100 bytes apart.  If these sample points are good,
2956  *   it's a pretty good bet that everything between them is good, too.
2957  */
2958 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2959 {
2960         u32 val;
2961         int rc = 0;
2962         u32 errcnt = 0;
2963         u32 i;
2964
2965         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
2966
2967         rc = iwl_grab_nic_access(priv);
2968         if (rc)
2969                 return rc;
2970
2971         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2972                 /* read data comes through single port, auto-incr addr */
2973                 /* NOTE: Use the debugless read so we don't flood kernel log
2974                  * if IWL_DL_IO is set */
2975                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2976                         i + IWL39_RTC_INST_LOWER_BOUND);
2977                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2978                 if (val != le32_to_cpu(*image)) {
2979 #if 0 /* Enable this if you want to see details */
2980                         IWL_ERR(priv, "uCode INST section is invalid at "
2981                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2982                                   i, val, *image);
2983 #endif
2984                         rc = -EIO;
2985                         errcnt++;
2986                         if (errcnt >= 3)
2987                                 break;
2988                 }
2989         }
2990
2991         iwl_release_nic_access(priv);
2992
2993         return rc;
2994 }
2995
2996
2997 /**
2998  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2999  *    and verify its contents
3000  */
3001 static int iwl3945_verify_ucode(struct iwl_priv *priv)
3002 {
3003         __le32 *image;
3004         u32 len;
3005         int rc = 0;
3006
3007         /* Try bootstrap */
3008         image = (__le32 *)priv->ucode_boot.v_addr;
3009         len = priv->ucode_boot.len;
3010         rc = iwl3945_verify_inst_sparse(priv, image, len);
3011         if (rc == 0) {
3012                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
3013                 return 0;
3014         }
3015
3016         /* Try initialize */
3017         image = (__le32 *)priv->ucode_init.v_addr;
3018         len = priv->ucode_init.len;
3019         rc = iwl3945_verify_inst_sparse(priv, image, len);
3020         if (rc == 0) {
3021                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
3022                 return 0;
3023         }
3024
3025         /* Try runtime/protocol */
3026         image = (__le32 *)priv->ucode_code.v_addr;
3027         len = priv->ucode_code.len;
3028         rc = iwl3945_verify_inst_sparse(priv, image, len);
3029         if (rc == 0) {
3030                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
3031                 return 0;
3032         }
3033
3034         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
3035
3036         /* Since nothing seems to match, show first several data entries in
3037          * instruction SRAM, so maybe visual inspection will give a clue.
3038          * Selection of bootstrap image (vs. other images) is arbitrary. */
3039         image = (__le32 *)priv->ucode_boot.v_addr;
3040         len = priv->ucode_boot.len;
3041         rc = iwl3945_verify_inst_full(priv, image, len);
3042
3043         return rc;
3044 }
3045
3046 static void iwl3945_nic_start(struct iwl_priv *priv)
3047 {
3048         /* Remove all resets to allow NIC to operate */
3049         iwl_write32(priv, CSR_RESET, 0);
3050 }
3051
3052 /**
3053  * iwl3945_read_ucode - Read uCode images from disk file.
3054  *
3055  * Copy into buffers for card to fetch via bus-mastering
3056  */
3057 static int iwl3945_read_ucode(struct iwl_priv *priv)
3058 {
3059         struct iwl_ucode *ucode;
3060         int ret = -EINVAL, index;
3061         const struct firmware *ucode_raw;
3062         /* firmware file name contains uCode/driver compatibility version */
3063         const char *name_pre = priv->cfg->fw_name_pre;
3064         const unsigned int api_max = priv->cfg->ucode_api_max;
3065         const unsigned int api_min = priv->cfg->ucode_api_min;
3066         char buf[25];
3067         u8 *src;
3068         size_t len;
3069         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
3070
3071         /* Ask kernel firmware_class module to get the boot firmware off disk.
3072          * request_firmware() is synchronous, file is in memory on return. */
3073         for (index = api_max; index >= api_min; index--) {
3074                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
3075                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
3076                 if (ret < 0) {
3077                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
3078                                   buf, ret);
3079                         if (ret == -ENOENT)
3080                                 continue;
3081                         else
3082                                 goto error;
3083                 } else {
3084                         if (index < api_max)
3085                                 IWL_ERR(priv, "Loaded firmware %s, "
3086                                         "which is deprecated. "
3087                                         " Please use API v%u instead.\n",
3088                                           buf, api_max);
3089                         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
3090                                        buf, ucode_raw->size);
3091                         break;
3092                 }
3093         }
3094
3095         if (ret < 0)
3096                 goto error;
3097
3098         /* Make sure that we got at least our header! */
3099         if (ucode_raw->size < sizeof(*ucode)) {
3100                 IWL_ERR(priv, "File size way too small!\n");
3101                 ret = -EINVAL;
3102                 goto err_release;
3103         }
3104
3105         /* Data from ucode file:  header followed by uCode images */
3106         ucode = (void *)ucode_raw->data;
3107
3108         priv->ucode_ver = le32_to_cpu(ucode->ver);
3109         api_ver = IWL_UCODE_API(priv->ucode_ver);
3110         inst_size = le32_to_cpu(ucode->inst_size);
3111         data_size = le32_to_cpu(ucode->data_size);
3112         init_size = le32_to_cpu(ucode->init_size);
3113         init_data_size = le32_to_cpu(ucode->init_data_size);
3114         boot_size = le32_to_cpu(ucode->boot_size);
3115
3116         /* api_ver should match the api version forming part of the
3117          * firmware filename ... but we don't check for that and only rely
3118          * on the API version read from firware header from here on forward */
3119
3120         if (api_ver < api_min || api_ver > api_max) {
3121                 IWL_ERR(priv, "Driver unable to support your firmware API. "
3122                           "Driver supports v%u, firmware is v%u.\n",
3123                           api_max, api_ver);
3124                 priv->ucode_ver = 0;
3125                 ret = -EINVAL;
3126                 goto err_release;
3127         }
3128         if (api_ver != api_max)
3129                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
3130                           "got %u. New firmware can be obtained "
3131                           "from http://www.intellinuxwireless.org.\n",
3132                           api_max, api_ver);
3133
3134         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
3135                 IWL_UCODE_MAJOR(priv->ucode_ver),
3136                 IWL_UCODE_MINOR(priv->ucode_ver),
3137                 IWL_UCODE_API(priv->ucode_ver),
3138                 IWL_UCODE_SERIAL(priv->ucode_ver));
3139
3140         IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
3141                        priv->ucode_ver);
3142         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
3143         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
3144         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
3145         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
3146         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
3147
3148
3149         /* Verify size of file vs. image size info in file's header */
3150         if (ucode_raw->size < sizeof(*ucode) +
3151                 inst_size + data_size + init_size +
3152                 init_data_size + boot_size) {
3153
3154                 IWL_DEBUG_INFO("uCode file size %d too small\n",
3155                                (int)ucode_raw->size);
3156                 ret = -EINVAL;
3157                 goto err_release;
3158         }
3159
3160         /* Verify that uCode images will fit in card's SRAM */
3161         if (inst_size > IWL39_MAX_INST_SIZE) {
3162                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
3163                                inst_size);
3164                 ret = -EINVAL;
3165                 goto err_release;
3166         }
3167
3168         if (data_size > IWL39_MAX_DATA_SIZE) {
3169                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
3170                                data_size);
3171                 ret = -EINVAL;
3172                 goto err_release;
3173         }
3174         if (init_size > IWL39_MAX_INST_SIZE) {
3175                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
3176                                 init_size);
3177                 ret = -EINVAL;
3178                 goto err_release;
3179         }
3180         if (init_data_size > IWL39_MAX_DATA_SIZE) {
3181                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
3182                                 init_data_size);
3183                 ret = -EINVAL;
3184                 goto err_release;
3185         }
3186         if (boot_size > IWL39_MAX_BSM_SIZE) {
3187                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
3188                                 boot_size);
3189                 ret = -EINVAL;
3190                 goto err_release;
3191         }
3192
3193         /* Allocate ucode buffers for card's bus-master loading ... */
3194
3195         /* Runtime instructions and 2 copies of data:
3196          * 1) unmodified from disk
3197          * 2) backup cache for save/restore during power-downs */
3198         priv->ucode_code.len = inst_size;
3199         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
3200
3201         priv->ucode_data.len = data_size;
3202         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
3203
3204         priv->ucode_data_backup.len = data_size;
3205         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
3206
3207         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
3208             !priv->ucode_data_backup.v_addr)
3209                 goto err_pci_alloc;
3210
3211         /* Initialization instructions and data */
3212         if (init_size && init_data_size) {
3213                 priv->ucode_init.len = init_size;
3214                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
3215
3216                 priv->ucode_init_data.len = init_data_size;
3217                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
3218
3219                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
3220                         goto err_pci_alloc;
3221         }
3222
3223         /* Bootstrap (instructions only, no data) */
3224         if (boot_size) {
3225                 priv->ucode_boot.len = boot_size;
3226                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
3227
3228                 if (!priv->ucode_boot.v_addr)
3229                         goto err_pci_alloc;
3230         }
3231
3232         /* Copy images into buffers for card's bus-master reads ... */
3233
3234         /* Runtime instructions (first block of data in file) */
3235         src = &ucode->data[0];
3236         len = priv->ucode_code.len;
3237         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
3238         memcpy(priv->ucode_code.v_addr, src, len);
3239         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
3240                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
3241
3242         /* Runtime data (2nd block)
3243          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
3244         src = &ucode->data[inst_size];
3245         len = priv->ucode_data.len;
3246         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
3247         memcpy(priv->ucode_data.v_addr, src, len);
3248         memcpy(priv->ucode_data_backup.v_addr, src, len);
3249
3250         /* Initialization instructions (3rd block) */
3251         if (init_size) {
3252                 src = &ucode->data[inst_size + data_size];
3253                 len = priv->ucode_init.len;
3254                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
3255                                len);
3256                 memcpy(priv->ucode_init.v_addr, src, len);
3257         }
3258
3259         /* Initialization data (4th block) */
3260         if (init_data_size) {
3261                 src = &ucode->data[inst_size + data_size + init_size];
3262                 len = priv->ucode_init_data.len;
3263                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
3264                                (int)len);
3265                 memcpy(priv->ucode_init_data.v_addr, src, len);
3266         }
3267
3268         /* Bootstrap instructions (5th block) */
3269         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
3270         len = priv->ucode_boot.len;
3271         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
3272                        (int)len);
3273         memcpy(priv->ucode_boot.v_addr, src, len);
3274
3275         /* We have our copies now, allow OS release its copies */
3276         release_firmware(ucode_raw);
3277         return 0;
3278
3279  err_pci_alloc:
3280         IWL_ERR(priv, "failed to allocate pci memory\n");
3281         ret = -ENOMEM;
3282         iwl3945_dealloc_ucode_pci(priv);
3283
3284  err_release:
3285         release_firmware(ucode_raw);
3286
3287  error:
3288         return ret;
3289 }
3290
3291
3292 /**
3293  * iwl3945_set_ucode_ptrs - Set uCode address location
3294  *
3295  * Tell initialization uCode where to find runtime uCode.
3296  *
3297  * BSM registers initially contain pointers to initialization uCode.
3298  * We need to replace them to load runtime uCode inst and data,
3299  * and to save runtime data when powering down.
3300  */
3301 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
3302 {
3303         dma_addr_t pinst;
3304         dma_addr_t pdata;
3305         int rc = 0;
3306         unsigned long flags;
3307
3308         /* bits 31:0 for 3945 */
3309         pinst = priv->ucode_code.p_addr;
3310         pdata = priv->ucode_data_backup.p_addr;
3311
3312         spin_lock_irqsave(&priv->lock, flags);
3313         rc = iwl_grab_nic_access(priv);
3314         if (rc) {
3315                 spin_unlock_irqrestore(&priv->lock, flags);
3316                 return rc;
3317         }
3318
3319         /* Tell bootstrap uCode where to find image to load */
3320         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
3321         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
3322         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
3323                                  priv->ucode_data.len);
3324
3325         /* Inst byte count must be last to set up, bit 31 signals uCode
3326          *   that all new ptr/size info is in place */
3327         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
3328                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
3329
3330         iwl_release_nic_access(priv);
3331
3332         spin_unlock_irqrestore(&priv->lock, flags);
3333
3334         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
3335
3336         return rc;
3337 }
3338
3339 /**
3340  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
3341  *
3342  * Called after REPLY_ALIVE notification received from "initialize" uCode.
3343  *
3344  * Tell "initialize" uCode to go ahead and load the runtime uCode.
3345  */
3346 static void iwl3945_init_alive_start(struct iwl_priv *priv)
3347 {
3348         /* Check alive response for "valid" sign from uCode */
3349         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
3350                 /* We had an error bringing up the hardware, so take it
3351                  * all the way back down so we can try again */
3352                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
3353                 goto restart;
3354         }
3355
3356         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
3357          * This is a paranoid check, because we would not have gotten the
3358          * "initialize" alive if code weren't properly loaded.  */
3359         if (iwl3945_verify_ucode(priv)) {
3360                 /* Runtime instruction load was bad;
3361                  * take it all the way back down so we can try again */
3362                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
3363                 goto restart;
3364         }
3365
3366         /* Send pointers to protocol/runtime uCode image ... init code will
3367          * load and launch runtime uCode, which will send us another "Alive"
3368          * notification. */
3369         IWL_DEBUG_INFO("Initialization Alive received.\n");
3370         if (iwl3945_set_ucode_ptrs(priv)) {
3371                 /* Runtime instruction load won't happen;
3372                  * take it all the way back down so we can try again */
3373                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
3374                 goto restart;
3375         }
3376         return;
3377
3378  restart:
3379         queue_work(priv->workqueue, &priv->restart);
3380 }
3381
3382
3383 /* temporary */
3384 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw,
3385                                      struct sk_buff *skb);
3386
3387 /**
3388  * iwl3945_alive_start - called after REPLY_ALIVE notification received
3389  *                   from protocol/runtime uCode (initialization uCode's
3390  *                   Alive gets handled by iwl3945_init_alive_start()).
3391  */
3392 static void iwl3945_alive_start(struct iwl_priv *priv)
3393 {
3394         int rc = 0;
3395         int thermal_spin = 0;
3396         u32 rfkill;
3397
3398         IWL_DEBUG_INFO("Runtime Alive received.\n");
3399
3400         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
3401                 /* We had an error bringing up the hardware, so take it
3402                  * all the way back down so we can try again */
3403                 IWL_DEBUG_INFO("Alive failed.\n");
3404                 goto restart;
3405         }
3406
3407         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
3408          * This is a paranoid check, because we would not have gotten the
3409          * "runtime" alive if code weren't properly loaded.  */
3410         if (iwl3945_verify_ucode(priv)) {
3411                 /* Runtime instruction load was bad;
3412                  * take it all the way back down so we can try again */
3413                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
3414                 goto restart;
3415         }
3416
3417         iwl3945_clear_stations_table(priv);
3418
3419         rc = iwl_grab_nic_access(priv);
3420         if (rc) {
3421                 IWL_WARN(priv, "Can not read RFKILL status from adapter\n");
3422                 return;
3423         }
3424
3425         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
3426         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
3427         iwl_release_nic_access(priv);
3428
3429         if (rfkill & 0x1) {
3430                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3431                 /* if RFKILL is not on, then wait for thermal
3432                  * sensor in adapter to kick in */
3433                 while (iwl3945_hw_get_temperature(priv) == 0) {
3434                         thermal_spin++;
3435                         udelay(10);
3436                 }
3437
3438                 if (thermal_spin)
3439                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
3440                                        thermal_spin * 10);
3441         } else
3442                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3443
3444         /* After the ALIVE response, we can send commands to 3945 uCode */
3445         set_bit(STATUS_ALIVE, &priv->status);
3446
3447         /* Clear out the uCode error bit if it is set */
3448         clear_bit(STATUS_FW_ERROR, &priv->status);
3449
3450         if (iwl_is_rfkill(priv))
3451                 return;
3452
3453         ieee80211_wake_queues(priv->hw);
3454
3455         priv->active_rate = priv->rates_mask;
3456         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
3457
3458         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
3459
3460         if (iwl_is_associated(priv)) {
3461                 struct iwl3945_rxon_cmd *active_rxon =
3462                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
3463
3464                 memcpy(&priv->staging_rxon, &priv->active_rxon,
3465                        sizeof(priv->staging_rxon));
3466                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3467         } else {
3468                 /* Initialize our rx_config data */
3469                 iwl_connection_init_rx_config(priv, priv->iw_mode);
3470         }
3471
3472         /* Configure Bluetooth device coexistence support */
3473         iwl_send_bt_config(priv);
3474
3475         /* Configure the adapter for unassociated operation */
3476         iwl3945_commit_rxon(priv);
3477
3478         iwl3945_reg_txpower_periodic(priv);
3479
3480         iwl3945_led_register(priv);
3481
3482         IWL_DEBUG_INFO("ALIVE processing complete.\n");
3483         set_bit(STATUS_READY, &priv->status);
3484         wake_up_interruptible(&priv->wait_command_queue);
3485
3486         if (priv->error_recovering)
3487                 iwl3945_error_recovery(priv);
3488
3489         /* reassociate for ADHOC mode */
3490         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
3491                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
3492                                                                 priv->vif);
3493                 if (beacon)
3494                         iwl3945_mac_beacon_update(priv->hw, beacon);
3495         }
3496
3497         return;
3498
3499  restart:
3500         queue_work(priv->workqueue, &priv->restart);
3501 }
3502
3503 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
3504
3505 static void __iwl3945_down(struct iwl_priv *priv)
3506 {
3507         unsigned long flags;
3508         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
3509         struct ieee80211_conf *conf = NULL;
3510
3511         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
3512
3513         conf = ieee80211_get_hw_conf(priv->hw);
3514
3515         if (!exit_pending)
3516                 set_bit(STATUS_EXIT_PENDING, &priv->status);
3517
3518         iwl3945_led_unregister(priv);
3519         iwl3945_clear_stations_table(priv);
3520
3521         /* Unblock any waiting calls */
3522         wake_up_interruptible_all(&priv->wait_command_queue);
3523
3524         /* Wipe out the EXIT_PENDING status bit if we are not actually
3525          * exiting the module */
3526         if (!exit_pending)
3527                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
3528
3529         /* stop and reset the on-board processor */
3530         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
3531
3532         /* tell the device to stop sending interrupts */
3533         spin_lock_irqsave(&priv->lock, flags);
3534         iwl3945_disable_interrupts(priv);
3535         spin_unlock_irqrestore(&priv->lock, flags);
3536         iwl_synchronize_irq(priv);
3537
3538         if (priv->mac80211_registered)
3539                 ieee80211_stop_queues(priv->hw);
3540
3541         /* If we have not previously called iwl3945_init() then
3542          * clear all bits but the RF Kill and SUSPEND bits and return */
3543         if (!iwl_is_init(priv)) {
3544                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
3545                                         STATUS_RF_KILL_HW |
3546                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
3547                                         STATUS_RF_KILL_SW |
3548                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
3549                                         STATUS_GEO_CONFIGURED |
3550                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
3551                                         STATUS_IN_SUSPEND |
3552                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
3553                                         STATUS_EXIT_PENDING;
3554                 goto exit;
3555         }
3556
3557         /* ...otherwise clear out all the status bits but the RF Kill and
3558          * SUSPEND bits and continue taking the NIC down. */
3559         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
3560                                 STATUS_RF_KILL_HW |
3561                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
3562                                 STATUS_RF_KILL_SW |
3563                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
3564                                 STATUS_GEO_CONFIGURED |
3565                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
3566                                 STATUS_IN_SUSPEND |
3567                         test_bit(STATUS_FW_ERROR, &priv->status) <<
3568                                 STATUS_FW_ERROR |
3569                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
3570                                 STATUS_EXIT_PENDING;
3571
3572         priv->cfg->ops->lib->apm_ops.reset(priv);
3573         spin_lock_irqsave(&priv->lock, flags);
3574         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3575         spin_unlock_irqrestore(&priv->lock, flags);
3576
3577         iwl3945_hw_txq_ctx_stop(priv);
3578         iwl3945_hw_rxq_stop(priv);
3579
3580         spin_lock_irqsave(&priv->lock, flags);
3581         if (!iwl_grab_nic_access(priv)) {
3582                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
3583                                          APMG_CLK_VAL_DMA_CLK_RQT);
3584                 iwl_release_nic_access(priv);
3585         }
3586         spin_unlock_irqrestore(&priv->lock, flags);
3587
3588         udelay(5);
3589
3590         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
3591                 priv->cfg->ops->lib->apm_ops.stop(priv);
3592         else
3593                 priv->cfg->ops->lib->apm_ops.reset(priv);
3594
3595  exit:
3596         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
3597
3598         if (priv->ibss_beacon)
3599                 dev_kfree_skb(priv->ibss_beacon);
3600         priv->ibss_beacon = NULL;
3601
3602         /* clear out any free frames */
3603         iwl3945_clear_free_frames(priv);
3604 }
3605
3606 static void iwl3945_down(struct iwl_priv *priv)
3607 {
3608         mutex_lock(&priv->mutex);
3609         __iwl3945_down(priv);
3610         mutex_unlock(&priv->mutex);
3611
3612         iwl3945_cancel_deferred_work(priv);
3613 }
3614
3615 #define MAX_HW_RESTARTS 5
3616
3617 static int __iwl3945_up(struct iwl_priv *priv)
3618 {
3619         int rc, i;
3620
3621         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3622                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
3623                 return -EIO;
3624         }
3625
3626         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
3627                 IWL_WARN(priv, "Radio disabled by SW RF kill (module "
3628                             "parameter)\n");
3629                 return -ENODEV;
3630         }
3631
3632         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
3633                 IWL_ERR(priv, "ucode not available for device bring up\n");
3634                 return -EIO;
3635         }
3636
3637         /* If platform's RF_KILL switch is NOT set to KILL */
3638         if (iwl_read32(priv, CSR_GP_CNTRL) &
3639                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3640                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3641         else {
3642                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3643                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
3644                         IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
3645                         return -ENODEV;
3646                 }
3647         }
3648
3649         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
3650
3651         rc = iwl3945_hw_nic_init(priv);
3652         if (rc) {
3653                 IWL_ERR(priv, "Unable to int nic\n");
3654                 return rc;
3655         }
3656
3657         /* make sure rfkill handshake bits are cleared */
3658         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3659         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3660                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3661
3662         /* clear (again), then enable host interrupts */
3663         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
3664         iwl3945_enable_interrupts(priv);
3665
3666         /* really make sure rfkill handshake bits are cleared */
3667         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3668         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3669
3670         /* Copy original ucode data image from disk into backup cache.
3671          * This will be used to initialize the on-board processor's
3672          * data SRAM for a clean start when the runtime program first loads. */
3673         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
3674                priv->ucode_data.len);
3675
3676         /* We return success when we resume from suspend and rf_kill is on. */
3677         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
3678                 return 0;
3679
3680         for (i = 0; i < MAX_HW_RESTARTS; i++) {
3681
3682                 iwl3945_clear_stations_table(priv);
3683
3684                 /* load bootstrap state machine,
3685                  * load bootstrap program into processor's memory,
3686                  * prepare to load the "initialize" uCode */
3687                 priv->cfg->ops->lib->load_ucode(priv);
3688
3689                 if (rc) {
3690                         IWL_ERR(priv,
3691                                 "Unable to set up bootstrap uCode: %d\n", rc);
3692                         continue;
3693                 }
3694
3695                 /* start card; "initialize" will load runtime ucode */
3696                 iwl3945_nic_start(priv);
3697
3698                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
3699
3700                 return 0;
3701         }
3702
3703         set_bit(STATUS_EXIT_PENDING, &priv->status);
3704         __iwl3945_down(priv);
3705         clear_bit(STATUS_EXIT_PENDING, &priv->status);
3706
3707         /* tried to restart and config the device for as long as our
3708          * patience could withstand */
3709         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
3710         return -EIO;
3711 }
3712
3713
3714 /*****************************************************************************
3715  *
3716  * Workqueue callbacks
3717  *
3718  *****************************************************************************/
3719
3720 static void iwl3945_bg_init_alive_start(struct work_struct *data)
3721 {
3722         struct iwl_priv *priv =
3723             container_of(data, struct iwl_priv, init_alive_start.work);
3724
3725         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3726                 return;
3727
3728         mutex_lock(&priv->mutex);
3729         iwl3945_init_alive_start(priv);
3730         mutex_unlock(&priv->mutex);
3731 }
3732
3733 static void iwl3945_bg_alive_start(struct work_struct *data)
3734 {
3735         struct iwl_priv *priv =
3736             container_of(data, struct iwl_priv, alive_start.work);
3737
3738         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3739                 return;
3740
3741         mutex_lock(&priv->mutex);
3742         iwl3945_alive_start(priv);
3743         mutex_unlock(&priv->mutex);
3744 }
3745
3746 static void iwl3945_rfkill_poll(struct work_struct *data)
3747 {
3748         struct iwl_priv *priv =
3749             container_of(data, struct iwl_priv, rfkill_poll.work);
3750         unsigned long status = priv->status;
3751
3752         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3753                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3754         else
3755                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3756
3757         if (test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))
3758                 queue_work(priv->workqueue, &priv->rf_kill);
3759
3760         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3761                            round_jiffies_relative(2 * HZ));
3762
3763 }
3764
3765 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
3766 static void iwl3945_bg_request_scan(struct work_struct *data)
3767 {
3768         struct iwl_priv *priv =
3769             container_of(data, struct iwl_priv, request_scan);
3770         struct iwl_host_cmd cmd = {
3771                 .id = REPLY_SCAN_CMD,
3772                 .len = sizeof(struct iwl3945_scan_cmd),
3773                 .meta.flags = CMD_SIZE_HUGE,
3774         };
3775         int rc = 0;
3776         struct iwl3945_scan_cmd *scan;
3777         struct ieee80211_conf *conf = NULL;
3778         u8 n_probes = 2;
3779         enum ieee80211_band band;
3780         DECLARE_SSID_BUF(ssid);
3781
3782         conf = ieee80211_get_hw_conf(priv->hw);
3783
3784         mutex_lock(&priv->mutex);
3785
3786         if (!iwl_is_ready(priv)) {
3787                 IWL_WARN(priv, "request scan called when driver not ready.\n");
3788                 goto done;
3789         }
3790
3791         /* Make sure the scan wasn't canceled before this queued work
3792          * was given the chance to run... */
3793         if (!test_bit(STATUS_SCANNING, &priv->status))
3794                 goto done;
3795
3796         /* This should never be called or scheduled if there is currently
3797          * a scan active in the hardware. */
3798         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
3799                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
3800                                "Ignoring second request.\n");
3801                 rc = -EIO;
3802                 goto done;
3803         }
3804
3805         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3806                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
3807                 goto done;
3808         }
3809
3810         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3811                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
3812                 goto done;
3813         }
3814
3815         if (iwl_is_rfkill(priv)) {
3816                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
3817                 goto done;
3818         }
3819
3820         if (!test_bit(STATUS_READY, &priv->status)) {
3821                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
3822                 goto done;
3823         }
3824
3825         if (!priv->scan_bands) {
3826                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
3827                 goto done;
3828         }
3829
3830         if (!priv->scan) {
3831                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
3832                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
3833                 if (!priv->scan) {
3834                         rc = -ENOMEM;
3835                         goto done;
3836                 }
3837         }
3838         scan = priv->scan;
3839         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
3840
3841         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
3842         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
3843
3844         if (iwl_is_associated(priv)) {
3845                 u16 interval = 0;
3846                 u32 extra;
3847                 u32 suspend_time = 100;
3848                 u32 scan_suspend_time = 100;
3849                 unsigned long flags;
3850
3851                 IWL_DEBUG_INFO("Scanning while associated...\n");
3852
3853                 spin_lock_irqsave(&priv->lock, flags);
3854                 interval = priv->beacon_int;
3855                 spin_unlock_irqrestore(&priv->lock, flags);
3856
3857                 scan->suspend_time = 0;
3858                 scan->max_out_time = cpu_to_le32(200 * 1024);
3859                 if (!interval)
3860                         interval = suspend_time;
3861                 /*
3862                  * suspend time format:
3863                  *  0-19: beacon interval in usec (time before exec.)
3864                  * 20-23: 0
3865                  * 24-31: number of beacons (suspend between channels)
3866                  */
3867
3868                 extra = (suspend_time / interval) << 24;
3869                 scan_suspend_time = 0xFF0FFFFF &
3870                     (extra | ((suspend_time % interval) * 1024));
3871
3872                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
3873                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
3874                                scan_suspend_time, interval);
3875         }
3876
3877         /* We should add the ability for user to lock to PASSIVE ONLY */
3878         if (priv->one_direct_scan) {
3879                 IWL_DEBUG_SCAN
3880                     ("Kicking off one direct scan for '%s'\n",
3881                      print_ssid(ssid, priv->direct_ssid,
3882                                 priv->direct_ssid_len));
3883                 scan->direct_scan[0].id = WLAN_EID_SSID;
3884                 scan->direct_scan[0].len = priv->direct_ssid_len;
3885                 memcpy(scan->direct_scan[0].ssid,
3886                        priv->direct_ssid, priv->direct_ssid_len);
3887                 n_probes++;
3888         } else
3889                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
3890
3891         /* We don't build a direct scan probe request; the uCode will do
3892          * that based on the direct_mask added to each channel entry */
3893         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
3894         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
3895         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3896
3897         /* flags + rate selection */
3898
3899         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
3900                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
3901                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
3902                 scan->good_CRC_th = 0;
3903                 band = IEEE80211_BAND_2GHZ;
3904         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
3905                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
3906                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
3907                 band = IEEE80211_BAND_5GHZ;
3908         } else {
3909                 IWL_WARN(priv, "Invalid scan band count\n");
3910                 goto done;
3911         }
3912
3913         scan->tx_cmd.len = cpu_to_le16(
3914                 iwl_fill_probe_req(priv, band,
3915                                    (struct ieee80211_mgmt *)scan->data,
3916                                    IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3917
3918         /* select Rx antennas */
3919         scan->flags |= iwl3945_get_antenna_flags(priv);
3920
3921         if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
3922                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3923
3924         scan->channel_count =
3925                 iwl3945_get_channels_for_scan(priv, band, 1, /* active */
3926                                               n_probes,
3927                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3928
3929         if (scan->channel_count == 0) {
3930                 IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
3931                 goto done;
3932         }
3933
3934         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3935             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3936         cmd.data = scan;
3937         scan->len = cpu_to_le16(cmd.len);
3938
3939         set_bit(STATUS_SCAN_HW, &priv->status);
3940         rc = iwl_send_cmd_sync(priv, &cmd);
3941         if (rc)
3942                 goto done;
3943
3944         queue_delayed_work(priv->workqueue, &priv->scan_check,
3945                            IWL_SCAN_CHECK_WATCHDOG);
3946
3947         mutex_unlock(&priv->mutex);
3948         return;
3949
3950  done:
3951         /* can not perform scan make sure we clear scanning
3952          * bits from status so next scan request can be performed.
3953          * if we dont clear scanning status bit here all next scan
3954          * will fail
3955         */
3956         clear_bit(STATUS_SCAN_HW, &priv->status);
3957         clear_bit(STATUS_SCANNING, &priv->status);
3958
3959         /* inform mac80211 scan aborted */
3960         queue_work(priv->workqueue, &priv->scan_completed);
3961         mutex_unlock(&priv->mutex);
3962 }
3963
3964 static void iwl3945_bg_up(struct work_struct *data)
3965 {
3966         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3967
3968         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3969                 return;
3970
3971         mutex_lock(&priv->mutex);
3972         __iwl3945_up(priv);
3973         mutex_unlock(&priv->mutex);
3974         iwl_rfkill_set_hw_state(priv);
3975 }
3976
3977 static void iwl3945_bg_restart(struct work_struct *data)
3978 {
3979         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3980
3981         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3982                 return;
3983
3984         iwl3945_down(priv);
3985         queue_work(priv->workqueue, &priv->up);
3986 }
3987
3988 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3989 {
3990         struct iwl_priv *priv =
3991             container_of(data, struct iwl_priv, rx_replenish);
3992
3993         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3994                 return;
3995
3996         mutex_lock(&priv->mutex);
3997         iwl3945_rx_replenish(priv);
3998         mutex_unlock(&priv->mutex);
3999 }
4000
4001 #define IWL_DELAY_NEXT_SCAN (HZ*2)
4002
4003 static void iwl3945_post_associate(struct iwl_priv *priv)
4004 {
4005         int rc = 0;
4006         struct ieee80211_conf *conf = NULL;
4007
4008         if (priv->iw_mode == NL80211_IFTYPE_AP) {
4009                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
4010                 return;
4011         }
4012
4013
4014         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
4015                         priv->assoc_id, priv->active_rxon.bssid_addr);
4016
4017         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4018                 return;
4019
4020         if (!priv->vif || !priv->is_open)
4021                 return;
4022
4023         iwl_scan_cancel_timeout(priv, 200);
4024
4025         conf = ieee80211_get_hw_conf(priv->hw);
4026
4027         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4028         iwl3945_commit_rxon(priv);
4029
4030         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
4031         iwl3945_setup_rxon_timing(priv);
4032         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
4033                               sizeof(priv->rxon_timing), &priv->rxon_timing);
4034         if (rc)
4035                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
4036                             "Attempting to continue.\n");
4037
4038         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
4039
4040         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
4041
4042         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
4043                         priv->assoc_id, priv->beacon_int);
4044
4045         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
4046                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4047         else
4048                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4049
4050         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
4051                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
4052                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
4053                 else
4054                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
4055
4056                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
4057                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
4058
4059         }
4060
4061         iwl3945_commit_rxon(priv);
4062
4063         switch (priv->iw_mode) {
4064         case NL80211_IFTYPE_STATION:
4065                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
4066                 break;
4067
4068         case NL80211_IFTYPE_ADHOC:
4069
4070                 priv->assoc_id = 1;
4071                 iwl3945_add_station(priv, priv->bssid, 0, 0);
4072                 iwl3945_sync_sta(priv, IWL_STA_ID,
4073                                  (priv->band == IEEE80211_BAND_5GHZ) ?
4074                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
4075                                  CMD_ASYNC);
4076                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
4077                 iwl3945_send_beacon_cmd(priv);
4078
4079                 break;
4080
4081         default:
4082                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
4083                            __func__, priv->iw_mode);
4084                 break;
4085         }
4086
4087         iwl3945_activate_qos(priv, 0);
4088
4089         /* we have just associated, don't start scan too early */
4090         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
4091 }
4092
4093 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed);
4094
4095 /*****************************************************************************
4096  *
4097  * mac80211 entry point functions
4098  *
4099  *****************************************************************************/
4100
4101 #define UCODE_READY_TIMEOUT     (2 * HZ)
4102
4103 static int iwl3945_mac_start(struct ieee80211_hw *hw)
4104 {
4105         struct iwl_priv *priv = hw->priv;
4106         int ret;
4107
4108         IWL_DEBUG_MAC80211("enter\n");
4109
4110         /* we should be verifying the device is ready to be opened */
4111         mutex_lock(&priv->mutex);
4112
4113         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
4114         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
4115          * ucode filename and max sizes are card-specific. */
4116
4117         if (!priv->ucode_code.len) {
4118                 ret = iwl3945_read_ucode(priv);
4119                 if (ret) {
4120                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
4121                         mutex_unlock(&priv->mutex);
4122                         goto out_release_irq;
4123                 }
4124         }
4125
4126         ret = __iwl3945_up(priv);
4127
4128         mutex_unlock(&priv->mutex);
4129
4130         iwl_rfkill_set_hw_state(priv);
4131
4132         if (ret)
4133                 goto out_release_irq;
4134
4135         IWL_DEBUG_INFO("Start UP work.\n");
4136
4137         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
4138                 return 0;
4139
4140         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
4141          * mac80211 will not be run successfully. */
4142         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
4143                         test_bit(STATUS_READY, &priv->status),
4144                         UCODE_READY_TIMEOUT);
4145         if (!ret) {
4146                 if (!test_bit(STATUS_READY, &priv->status)) {
4147                         IWL_ERR(priv,
4148                                 "Wait for START_ALIVE timeout after %dms.\n",
4149                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
4150                         ret = -ETIMEDOUT;
4151                         goto out_release_irq;
4152                 }
4153         }
4154
4155         /* ucode is running and will send rfkill notifications,
4156          * no need to poll the killswitch state anymore */
4157         cancel_delayed_work(&priv->rfkill_poll);
4158
4159         priv->is_open = 1;
4160         IWL_DEBUG_MAC80211("leave\n");
4161         return 0;
4162
4163 out_release_irq:
4164         priv->is_open = 0;
4165         IWL_DEBUG_MAC80211("leave - failed\n");
4166         return ret;
4167 }
4168
4169 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
4170 {
4171         struct iwl_priv *priv = hw->priv;
4172
4173         IWL_DEBUG_MAC80211("enter\n");
4174
4175         if (!priv->is_open) {
4176                 IWL_DEBUG_MAC80211("leave - skip\n");
4177                 return;
4178         }
4179
4180         priv->is_open = 0;
4181
4182         if (iwl_is_ready_rf(priv)) {
4183                 /* stop mac, cancel any scan request and clear
4184                  * RXON_FILTER_ASSOC_MSK BIT
4185                  */
4186                 mutex_lock(&priv->mutex);
4187                 iwl_scan_cancel_timeout(priv, 100);
4188                 mutex_unlock(&priv->mutex);
4189         }
4190
4191         iwl3945_down(priv);
4192
4193         flush_workqueue(priv->workqueue);
4194
4195         /* start polling the killswitch state again */
4196         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4197                            round_jiffies_relative(2 * HZ));
4198
4199         IWL_DEBUG_MAC80211("leave\n");
4200 }
4201
4202 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
4203 {
4204         struct iwl_priv *priv = hw->priv;
4205
4206         IWL_DEBUG_MAC80211("enter\n");
4207
4208         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
4209                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
4210
4211         if (iwl3945_tx_skb(priv, skb))
4212                 dev_kfree_skb_any(skb);
4213
4214         IWL_DEBUG_MAC80211("leave\n");
4215         return NETDEV_TX_OK;
4216 }
4217
4218 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
4219                                  struct ieee80211_if_init_conf *conf)
4220 {
4221         struct iwl_priv *priv = hw->priv;
4222         unsigned long flags;
4223
4224         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
4225
4226         if (priv->vif) {
4227                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
4228                 return -EOPNOTSUPP;
4229         }
4230
4231         spin_lock_irqsave(&priv->lock, flags);
4232         priv->vif = conf->vif;
4233         priv->iw_mode = conf->type;
4234
4235         spin_unlock_irqrestore(&priv->lock, flags);
4236
4237         mutex_lock(&priv->mutex);
4238
4239         if (conf->mac_addr) {
4240                 IWL_DEBUG_MAC80211("Set: %pM\n", conf->mac_addr);
4241                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
4242         }
4243
4244         if (iwl_is_ready(priv))
4245                 iwl3945_set_mode(priv, conf->type);
4246
4247         mutex_unlock(&priv->mutex);
4248
4249         IWL_DEBUG_MAC80211("leave\n");
4250         return 0;
4251 }
4252
4253 /**
4254  * iwl3945_mac_config - mac80211 config callback
4255  *
4256  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
4257  * be set inappropriately and the driver currently sets the hardware up to
4258  * use it whenever needed.
4259  */
4260 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
4261 {
4262         struct iwl_priv *priv = hw->priv;
4263         const struct iwl_channel_info *ch_info;
4264         struct ieee80211_conf *conf = &hw->conf;
4265         unsigned long flags;
4266         int ret = 0;
4267
4268         mutex_lock(&priv->mutex);
4269         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
4270
4271         if (!iwl_is_ready(priv)) {
4272                 IWL_DEBUG_MAC80211("leave - not ready\n");
4273                 ret = -EIO;
4274                 goto out;
4275         }
4276
4277         if (unlikely(!iwl3945_mod_params.disable_hw_scan &&
4278                      test_bit(STATUS_SCANNING, &priv->status))) {
4279                 IWL_DEBUG_MAC80211("leave - scanning\n");
4280                 set_bit(STATUS_CONF_PENDING, &priv->status);
4281                 mutex_unlock(&priv->mutex);
4282                 return 0;
4283         }
4284
4285         spin_lock_irqsave(&priv->lock, flags);
4286
4287         ch_info = iwl_get_channel_info(priv, conf->channel->band,
4288                                        conf->channel->hw_value);
4289         if (!is_channel_valid(ch_info)) {
4290                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
4291                                conf->channel->hw_value, conf->channel->band);
4292                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
4293                 spin_unlock_irqrestore(&priv->lock, flags);
4294                 ret = -EINVAL;
4295                 goto out;
4296         }
4297
4298         iwl_set_rxon_channel(priv, conf->channel);
4299
4300         iwl_set_flags_for_band(priv, conf->channel->band);
4301
4302         /* The list of supported rates and rate mask can be different
4303          * for each phymode; since the phymode may have changed, reset
4304          * the rate mask to what mac80211 lists */
4305         iwl_set_rate(priv);
4306
4307         spin_unlock_irqrestore(&priv->lock, flags);
4308
4309 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
4310         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
4311                 iwl3945_hw_channel_switch(priv, conf->channel);
4312                 goto out;
4313         }
4314 #endif
4315
4316         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
4317
4318         if (!conf->radio_enabled) {
4319                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
4320                 goto out;
4321         }
4322
4323         if (iwl_is_rfkill(priv)) {
4324                 IWL_DEBUG_MAC80211("leave - RF kill\n");
4325                 ret = -EIO;
4326                 goto out;
4327         }
4328
4329         iwl_set_rate(priv);
4330
4331         if (memcmp(&priv->active_rxon,
4332                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
4333                 iwl3945_commit_rxon(priv);
4334         else
4335                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
4336
4337         IWL_DEBUG_MAC80211("leave\n");
4338
4339 out:
4340         clear_bit(STATUS_CONF_PENDING, &priv->status);
4341         mutex_unlock(&priv->mutex);
4342         return ret;
4343 }
4344
4345 static void iwl3945_config_ap(struct iwl_priv *priv)
4346 {
4347         int rc = 0;
4348
4349         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
4350                 return;
4351
4352         /* The following should be done only at AP bring up */
4353         if (!(iwl_is_associated(priv))) {
4354
4355                 /* RXON - unassoc (to set timing command) */
4356                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4357                 iwl3945_commit_rxon(priv);
4358
4359                 /* RXON Timing */
4360                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
4361                 iwl3945_setup_rxon_timing(priv);
4362                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
4363                                       sizeof(priv->rxon_timing),
4364                                       &priv->rxon_timing);
4365                 if (rc)
4366                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
4367                                         "Attempting to continue.\n");
4368
4369                 /* FIXME: what should be the assoc_id for AP? */
4370                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
4371                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
4372                         priv->staging_rxon.flags |=
4373                                 RXON_FLG_SHORT_PREAMBLE_MSK;
4374                 else
4375                         priv->staging_rxon.flags &=
4376                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
4377
4378                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
4379                         if (priv->assoc_capability &
4380                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
4381                                 priv->staging_rxon.flags |=
4382                                         RXON_FLG_SHORT_SLOT_MSK;
4383                         else
4384                                 priv->staging_rxon.flags &=
4385                                         ~RXON_FLG_SHORT_SLOT_MSK;
4386
4387                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
4388                                 priv->staging_rxon.flags &=
4389                                         ~RXON_FLG_SHORT_SLOT_MSK;
4390                 }
4391                 /* restore RXON assoc */
4392                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
4393                 iwl3945_commit_rxon(priv);
4394                 iwl3945_add_station(priv, iwl_bcast_addr, 0, 0);
4395         }
4396         iwl3945_send_beacon_cmd(priv);
4397
4398         /* FIXME - we need to add code here to detect a totally new
4399          * configuration, reset the AP, unassoc, rxon timing, assoc,
4400          * clear sta table, add BCAST sta... */
4401 }
4402
4403 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
4404                                         struct ieee80211_vif *vif,
4405                                         struct ieee80211_if_conf *conf)
4406 {
4407         struct iwl_priv *priv = hw->priv;
4408         int rc;
4409
4410         if (conf == NULL)
4411                 return -EIO;
4412
4413         if (priv->vif != vif) {
4414                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
4415                 return 0;
4416         }
4417
4418         /* handle this temporarily here */
4419         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
4420             conf->changed & IEEE80211_IFCC_BEACON) {
4421                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
4422                 if (!beacon)
4423                         return -ENOMEM;
4424                 mutex_lock(&priv->mutex);
4425                 rc = iwl3945_mac_beacon_update(hw, beacon);
4426                 mutex_unlock(&priv->mutex);
4427                 if (rc)
4428                         return rc;
4429         }
4430
4431         if (!iwl_is_alive(priv))
4432                 return -EAGAIN;
4433
4434         mutex_lock(&priv->mutex);
4435
4436         if (conf->bssid)
4437                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
4438
4439 /*
4440  * very dubious code was here; the probe filtering flag is never set:
4441  *
4442         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
4443             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
4444  */
4445
4446         if (priv->iw_mode == NL80211_IFTYPE_AP) {
4447                 if (!conf->bssid) {
4448                         conf->bssid = priv->mac_addr;
4449                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
4450                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
4451                                            conf->bssid);
4452                 }
4453                 if (priv->ibss_beacon)
4454                         dev_kfree_skb(priv->ibss_beacon);
4455
4456                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
4457         }
4458
4459         if (iwl_is_rfkill(priv))
4460                 goto done;
4461
4462         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
4463             !is_multicast_ether_addr(conf->bssid)) {
4464                 /* If there is currently a HW scan going on in the background
4465                  * then we need to cancel it else the RXON below will fail. */
4466                 if (iwl_scan_cancel_timeout(priv, 100)) {
4467                         IWL_WARN(priv, "Aborted scan still in progress "
4468                                     "after 100ms\n");
4469                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
4470                         mutex_unlock(&priv->mutex);
4471                         return -EAGAIN;
4472                 }
4473                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
4474
4475                 /* TODO: Audit driver for usage of these members and see
4476                  * if mac80211 deprecates them (priv->bssid looks like it
4477                  * shouldn't be there, but I haven't scanned the IBSS code
4478                  * to verify) - jpk */
4479                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
4480
4481                 if (priv->iw_mode == NL80211_IFTYPE_AP)
4482                         iwl3945_config_ap(priv);
4483                 else {
4484                         rc = iwl3945_commit_rxon(priv);
4485                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
4486                                 iwl3945_add_station(priv,
4487                                         priv->active_rxon.bssid_addr, 1, 0);
4488                 }
4489
4490         } else {
4491                 iwl_scan_cancel_timeout(priv, 100);
4492                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4493                 iwl3945_commit_rxon(priv);
4494         }
4495
4496  done:
4497         IWL_DEBUG_MAC80211("leave\n");
4498         mutex_unlock(&priv->mutex);
4499
4500         return 0;
4501 }
4502
4503 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
4504                                      struct ieee80211_if_init_conf *conf)
4505 {
4506         struct iwl_priv *priv = hw->priv;
4507
4508         IWL_DEBUG_MAC80211("enter\n");
4509
4510         mutex_lock(&priv->mutex);
4511
4512         if (iwl_is_ready_rf(priv)) {
4513                 iwl_scan_cancel_timeout(priv, 100);
4514                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4515                 iwl3945_commit_rxon(priv);
4516         }
4517         if (priv->vif == conf->vif) {
4518                 priv->vif = NULL;
4519                 memset(priv->bssid, 0, ETH_ALEN);
4520         }
4521         mutex_unlock(&priv->mutex);
4522
4523         IWL_DEBUG_MAC80211("leave\n");
4524 }
4525
4526 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
4527
4528 static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
4529                                      struct ieee80211_vif *vif,
4530                                      struct ieee80211_bss_conf *bss_conf,
4531                                      u32 changes)
4532 {
4533         struct iwl_priv *priv = hw->priv;
4534
4535         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
4536
4537         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
4538                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
4539                                    bss_conf->use_short_preamble);
4540                 if (bss_conf->use_short_preamble)
4541                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4542                 else
4543                         priv->staging_rxon.flags &=
4544                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
4545         }
4546
4547         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
4548                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
4549                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
4550                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
4551                 else
4552                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
4553         }
4554
4555         if (changes & BSS_CHANGED_ASSOC) {
4556                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
4557                 /* This should never happen as this function should
4558                  * never be called from interrupt context. */
4559                 if (WARN_ON_ONCE(in_interrupt()))
4560                         return;
4561                 if (bss_conf->assoc) {
4562                         priv->assoc_id = bss_conf->aid;
4563                         priv->beacon_int = bss_conf->beacon_int;
4564                         priv->timestamp = bss_conf->timestamp;
4565                         priv->assoc_capability = bss_conf->assoc_capability;
4566                         priv->power_data.dtim_period = bss_conf->dtim_period;
4567                         priv->next_scan_jiffies = jiffies +
4568                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4569                         mutex_lock(&priv->mutex);
4570                         iwl3945_post_associate(priv);
4571                         mutex_unlock(&priv->mutex);
4572                 } else {
4573                         priv->assoc_id = 0;
4574                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
4575                 }
4576         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
4577                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
4578                         iwl3945_send_rxon_assoc(priv);
4579         }
4580
4581 }
4582
4583 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
4584 {
4585         int rc = 0;
4586         unsigned long flags;
4587         struct iwl_priv *priv = hw->priv;
4588         DECLARE_SSID_BUF(ssid_buf);
4589
4590         IWL_DEBUG_MAC80211("enter\n");
4591
4592         mutex_lock(&priv->mutex);
4593         spin_lock_irqsave(&priv->lock, flags);
4594
4595         if (!iwl_is_ready_rf(priv)) {
4596                 rc = -EIO;
4597                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
4598                 goto out_unlock;
4599         }
4600
4601         /* we don't schedule scan within next_scan_jiffies period */
4602         if (priv->next_scan_jiffies &&
4603                         time_after(priv->next_scan_jiffies, jiffies)) {
4604                 rc = -EAGAIN;
4605                 goto out_unlock;
4606         }
4607         /* if we just finished scan ask for delay for a broadcast scan */
4608         if ((len == 0) && priv->last_scan_jiffies &&
4609             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
4610                        jiffies)) {
4611                 rc = -EAGAIN;
4612                 goto out_unlock;
4613         }
4614         if (len) {
4615                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
4616                                print_ssid(ssid_buf, ssid, len), (int)len);
4617
4618                 priv->one_direct_scan = 1;
4619                 priv->direct_ssid_len = (u8)
4620                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
4621                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
4622         } else
4623                 priv->one_direct_scan = 0;
4624
4625         rc = iwl3945_scan_initiate(priv);
4626
4627         IWL_DEBUG_MAC80211("leave\n");
4628
4629 out_unlock:
4630         spin_unlock_irqrestore(&priv->lock, flags);
4631         mutex_unlock(&priv->mutex);
4632
4633         return rc;
4634 }
4635
4636 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
4637                                struct ieee80211_vif *vif,
4638                                struct ieee80211_sta *sta,
4639                                struct ieee80211_key_conf *key)
4640 {
4641         struct iwl_priv *priv = hw->priv;
4642         const u8 *addr;
4643         int ret;
4644         u8 sta_id;
4645
4646         IWL_DEBUG_MAC80211("enter\n");
4647
4648         if (iwl3945_mod_params.sw_crypto) {
4649                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
4650                 return -EOPNOTSUPP;
4651         }
4652
4653         addr = sta ? sta->addr : iwl_bcast_addr;
4654         sta_id = iwl3945_hw_find_station(priv, addr);
4655         if (sta_id == IWL_INVALID_STATION) {
4656                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
4657                                    addr);
4658                 return -EINVAL;
4659         }
4660
4661         mutex_lock(&priv->mutex);
4662
4663         iwl_scan_cancel_timeout(priv, 100);
4664
4665         switch (cmd) {
4666         case  SET_KEY:
4667                 ret = iwl3945_update_sta_key_info(priv, key, sta_id);
4668                 if (!ret) {
4669                         iwl_set_rxon_hwcrypto(priv, 1);
4670                         iwl3945_commit_rxon(priv);
4671                         key->hw_key_idx = sta_id;
4672                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
4673                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
4674                 }
4675                 break;
4676         case DISABLE_KEY:
4677                 ret = iwl3945_clear_sta_key_info(priv, sta_id);
4678                 if (!ret) {
4679                         iwl_set_rxon_hwcrypto(priv, 0);
4680                         iwl3945_commit_rxon(priv);
4681                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
4682                 }
4683                 break;
4684         default:
4685                 ret = -EINVAL;
4686         }
4687
4688         IWL_DEBUG_MAC80211("leave\n");
4689         mutex_unlock(&priv->mutex);
4690
4691         return ret;
4692 }
4693
4694 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
4695                            const struct ieee80211_tx_queue_params *params)
4696 {
4697         struct iwl_priv *priv = hw->priv;
4698         unsigned long flags;
4699         int q;
4700
4701         IWL_DEBUG_MAC80211("enter\n");
4702
4703         if (!iwl_is_ready_rf(priv)) {
4704                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
4705                 return -EIO;
4706         }
4707
4708         if (queue >= AC_NUM) {
4709                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4710                 return 0;
4711         }
4712
4713         q = AC_NUM - 1 - queue;
4714
4715         spin_lock_irqsave(&priv->lock, flags);
4716
4717         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
4718         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
4719         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4720         priv->qos_data.def_qos_parm.ac[q].edca_txop =
4721                         cpu_to_le16((params->txop * 32));
4722
4723         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4724         priv->qos_data.qos_active = 1;
4725
4726         spin_unlock_irqrestore(&priv->lock, flags);
4727
4728         mutex_lock(&priv->mutex);
4729         if (priv->iw_mode == NL80211_IFTYPE_AP)
4730                 iwl3945_activate_qos(priv, 1);
4731         else if (priv->assoc_id && iwl_is_associated(priv))
4732                 iwl3945_activate_qos(priv, 0);
4733
4734         mutex_unlock(&priv->mutex);
4735
4736         IWL_DEBUG_MAC80211("leave\n");
4737         return 0;
4738 }
4739
4740 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
4741                                 struct ieee80211_tx_queue_stats *stats)
4742 {
4743         struct iwl_priv *priv = hw->priv;
4744         int i, avail;
4745         struct iwl_tx_queue *txq;
4746         struct iwl_queue *q;
4747         unsigned long flags;
4748
4749         IWL_DEBUG_MAC80211("enter\n");
4750
4751         if (!iwl_is_ready_rf(priv)) {
4752                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
4753                 return -EIO;
4754         }
4755
4756         spin_lock_irqsave(&priv->lock, flags);
4757
4758         for (i = 0; i < AC_NUM; i++) {
4759                 txq = &priv->txq[i];
4760                 q = &txq->q;
4761                 avail = iwl_queue_space(q);
4762
4763                 stats[i].len = q->n_window - avail;
4764                 stats[i].limit = q->n_window - q->high_mark;
4765                 stats[i].count = q->n_window;
4766
4767         }
4768         spin_unlock_irqrestore(&priv->lock, flags);
4769
4770         IWL_DEBUG_MAC80211("leave\n");
4771
4772         return 0;
4773 }
4774
4775 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
4776 {
4777         struct iwl_priv *priv = hw->priv;
4778         unsigned long flags;
4779
4780         mutex_lock(&priv->mutex);
4781         IWL_DEBUG_MAC80211("enter\n");
4782
4783         iwl_reset_qos(priv);
4784
4785         spin_lock_irqsave(&priv->lock, flags);
4786         priv->assoc_id = 0;
4787         priv->assoc_capability = 0;
4788
4789         /* new association get rid of ibss beacon skb */
4790         if (priv->ibss_beacon)
4791                 dev_kfree_skb(priv->ibss_beacon);
4792
4793         priv->ibss_beacon = NULL;
4794
4795         priv->beacon_int = priv->hw->conf.beacon_int;
4796         priv->timestamp = 0;
4797         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
4798                 priv->beacon_int = 0;
4799
4800         spin_unlock_irqrestore(&priv->lock, flags);
4801
4802         if (!iwl_is_ready_rf(priv)) {
4803                 IWL_DEBUG_MAC80211("leave - not ready\n");
4804                 mutex_unlock(&priv->mutex);
4805                 return;
4806         }
4807
4808         /* we are restarting association process
4809          * clear RXON_FILTER_ASSOC_MSK bit
4810         */
4811         if (priv->iw_mode != NL80211_IFTYPE_AP) {
4812                 iwl_scan_cancel_timeout(priv, 100);
4813                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4814                 iwl3945_commit_rxon(priv);
4815         }
4816
4817         /* Per mac80211.h: This is only used in IBSS mode... */
4818         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
4819
4820                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
4821                 mutex_unlock(&priv->mutex);
4822                 return;
4823         }
4824
4825         iwl_set_rate(priv);
4826
4827         mutex_unlock(&priv->mutex);
4828
4829         IWL_DEBUG_MAC80211("leave\n");
4830
4831 }
4832
4833 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
4834 {
4835         struct iwl_priv *priv = hw->priv;
4836         unsigned long flags;
4837
4838         IWL_DEBUG_MAC80211("enter\n");
4839
4840         if (!iwl_is_ready_rf(priv)) {
4841                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
4842                 return -EIO;
4843         }
4844
4845         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
4846                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
4847                 return -EIO;
4848         }
4849
4850         spin_lock_irqsave(&priv->lock, flags);
4851
4852         if (priv->ibss_beacon)
4853                 dev_kfree_skb(priv->ibss_beacon);
4854
4855         priv->ibss_beacon = skb;
4856
4857         priv->assoc_id = 0;
4858
4859         IWL_DEBUG_MAC80211("leave\n");
4860         spin_unlock_irqrestore(&priv->lock, flags);
4861
4862         iwl_reset_qos(priv);
4863
4864         iwl3945_post_associate(priv);
4865
4866
4867         return 0;
4868 }
4869
4870 /*****************************************************************************
4871  *
4872  * sysfs attributes
4873  *
4874  *****************************************************************************/
4875
4876 #ifdef CONFIG_IWLWIFI_DEBUG
4877
4878 /*
4879  * The following adds a new attribute to the sysfs representation
4880  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
4881  * used for controlling the debug level.
4882  *
4883  * See the level definitions in iwl for details.
4884  */
4885 static ssize_t show_debug_level(struct device *d,
4886                                 struct device_attribute *attr, char *buf)
4887 {
4888         struct iwl_priv *priv = d->driver_data;
4889
4890         return sprintf(buf, "0x%08X\n", priv->debug_level);
4891 }
4892 static ssize_t store_debug_level(struct device *d,
4893                                 struct device_attribute *attr,
4894                                  const char *buf, size_t count)
4895 {
4896         struct iwl_priv *priv = d->driver_data;
4897         unsigned long val;
4898         int ret;
4899
4900         ret = strict_strtoul(buf, 0, &val);
4901         if (ret)
4902                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
4903         else
4904                 priv->debug_level = val;
4905
4906         return strnlen(buf, count);
4907 }
4908
4909 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
4910                         show_debug_level, store_debug_level);
4911
4912 #endif /* CONFIG_IWLWIFI_DEBUG */
4913
4914 static ssize_t show_temperature(struct device *d,
4915                                 struct device_attribute *attr, char *buf)
4916 {
4917         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4918
4919         if (!iwl_is_alive(priv))
4920                 return -EAGAIN;
4921
4922         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
4923 }
4924
4925 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
4926
4927 static ssize_t show_tx_power(struct device *d,
4928                              struct device_attribute *attr, char *buf)
4929 {
4930         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4931         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
4932 }
4933
4934 static ssize_t store_tx_power(struct device *d,
4935                               struct device_attribute *attr,
4936                               const char *buf, size_t count)
4937 {
4938         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4939         char *p = (char *)buf;
4940         u32 val;
4941
4942         val = simple_strtoul(p, &p, 10);
4943         if (p == buf)
4944                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
4945         else
4946                 iwl3945_hw_reg_set_txpower(priv, val);
4947
4948         return count;
4949 }
4950
4951 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
4952
4953 static ssize_t show_flags(struct device *d,
4954                           struct device_attribute *attr, char *buf)
4955 {
4956         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4957
4958         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
4959 }
4960
4961 static ssize_t store_flags(struct device *d,
4962                            struct device_attribute *attr,
4963                            const char *buf, size_t count)
4964 {
4965         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4966         u32 flags = simple_strtoul(buf, NULL, 0);
4967
4968         mutex_lock(&priv->mutex);
4969         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
4970                 /* Cancel any currently running scans... */
4971                 if (iwl_scan_cancel_timeout(priv, 100))
4972                         IWL_WARN(priv, "Could not cancel scan.\n");
4973                 else {
4974                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
4975                                        flags);
4976                         priv->staging_rxon.flags = cpu_to_le32(flags);
4977                         iwl3945_commit_rxon(priv);
4978                 }
4979         }
4980         mutex_unlock(&priv->mutex);
4981
4982         return count;
4983 }
4984
4985 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
4986
4987 static ssize_t show_filter_flags(struct device *d,
4988                                  struct device_attribute *attr, char *buf)
4989 {
4990         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4991
4992         return sprintf(buf, "0x%04X\n",
4993                 le32_to_cpu(priv->active_rxon.filter_flags));
4994 }
4995
4996 static ssize_t store_filter_flags(struct device *d,
4997                                   struct device_attribute *attr,
4998                                   const char *buf, size_t count)
4999 {
5000         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
5001         u32 filter_flags = simple_strtoul(buf, NULL, 0);
5002
5003         mutex_lock(&priv->mutex);
5004         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
5005                 /* Cancel any currently running scans... */
5006                 if (iwl_scan_cancel_timeout(priv, 100))
5007                         IWL_WARN(priv, "Could not cancel scan.\n");
5008                 else {
5009                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
5010                                        "0x%04X\n", filter_flags);
5011                         priv->staging_rxon.filter_flags =
5012                                 cpu_to_le32(filter_flags);
5013                         iwl3945_commit_rxon(priv);
5014                 }
5015         }
5016         mutex_unlock(&priv->mutex);
5017
5018         return count;
5019 }
5020
5021 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
5022                    store_filter_flags);
5023
5024 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
5025
5026 static ssize_t show_measurement(struct device *d,
5027                                 struct device_attribute *attr, char *buf)
5028 {
5029         struct iwl_priv *priv = dev_get_drvdata(d);
5030         struct iwl_spectrum_notification measure_report;
5031         u32 size = sizeof(measure_report), len = 0, ofs = 0;
5032         u8 *data = (u8 *)&measure_report;
5033         unsigned long flags;
5034
5035         spin_lock_irqsave(&priv->lock, flags);
5036         if (!(priv->measurement_status & MEASUREMENT_READY)) {
5037                 spin_unlock_irqrestore(&priv->lock, flags);
5038                 return 0;
5039         }
5040         memcpy(&measure_report, &priv->measure_report, size);
5041         priv->measurement_status = 0;
5042         spin_unlock_irqrestore(&priv->lock, flags);
5043
5044         while (size && (PAGE_SIZE - len)) {
5045                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
5046                                    PAGE_SIZE - len, 1);
5047                 len = strlen(buf);
5048                 if (PAGE_SIZE - len)
5049                         buf[len++] = '\n';
5050
5051                 ofs += 16;
5052                 size -= min(size, 16U);
5053         }
5054
5055         return len;
5056 }
5057
5058 static ssize_t store_measurement(struct device *d,
5059                                  struct device_attribute *attr,
5060                                  const char *buf, size_t count)
5061 {
5062         struct iwl_priv *priv = dev_get_drvdata(d);
5063         struct ieee80211_measurement_params params = {
5064                 .channel = le16_to_cpu(priv->active_rxon.channel),
5065                 .start_time = cpu_to_le64(priv->last_tsf),
5066                 .duration = cpu_to_le16(1),
5067         };
5068         u8 type = IWL_MEASURE_BASIC;
5069         u8 buffer[32];
5070         u8 channel;
5071
5072         if (count) {
5073                 char *p = buffer;
5074                 strncpy(buffer, buf, min(sizeof(buffer), count));
5075                 channel = simple_strtoul(p, NULL, 0);
5076                 if (channel)
5077                         params.channel = channel;
5078
5079                 p = buffer;
5080                 while (*p && *p != ' ')
5081                         p++;
5082                 if (*p)
5083                         type = simple_strtoul(p + 1, NULL, 0);
5084         }
5085
5086         IWL_DEBUG_INFO("Invoking measurement of type %d on "
5087                        "channel %d (for '%s')\n", type, params.channel, buf);
5088         iwl3945_get_measurement(priv, &params, type);
5089
5090         return count;
5091 }
5092
5093 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
5094                    show_measurement, store_measurement);
5095 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
5096
5097 static ssize_t store_retry_rate(struct device *d,
5098                                 struct device_attribute *attr,
5099                                 const char *buf, size_t count)
5100 {
5101         struct iwl_priv *priv = dev_get_drvdata(d);
5102
5103         priv->retry_rate = simple_strtoul(buf, NULL, 0);
5104         if (priv->retry_rate <= 0)
5105                 priv->retry_rate = 1;
5106
5107         return count;
5108 }
5109
5110 static ssize_t show_retry_rate(struct device *d,
5111                                struct device_attribute *attr, char *buf)
5112 {
5113         struct iwl_priv *priv = dev_get_drvdata(d);
5114         return sprintf(buf, "%d", priv->retry_rate);
5115 }
5116
5117 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
5118                    store_retry_rate);
5119
5120 static ssize_t store_power_level(struct device *d,
5121                                  struct device_attribute *attr,
5122                                  const char *buf, size_t count)
5123 {
5124         struct iwl_priv *priv = dev_get_drvdata(d);
5125         int rc;
5126         int mode;
5127
5128         mode = simple_strtoul(buf, NULL, 0);
5129         mutex_lock(&priv->mutex);
5130
5131         if (!iwl_is_ready(priv)) {
5132                 rc = -EAGAIN;
5133                 goto out;
5134         }
5135
5136         if ((mode < 1) || (mode > IWL39_POWER_LIMIT) ||
5137             (mode == IWL39_POWER_AC))
5138                 mode = IWL39_POWER_AC;
5139         else
5140                 mode |= IWL_POWER_ENABLED;
5141
5142         if (mode != priv->power_mode) {
5143                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
5144                 if (rc) {
5145                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
5146                         goto out;
5147                 }
5148                 priv->power_mode = mode;
5149         }
5150
5151         rc = count;
5152
5153  out:
5154         mutex_unlock(&priv->mutex);
5155         return rc;
5156 }
5157
5158 #define MAX_WX_STRING 80
5159
5160 /* Values are in microsecond */
5161 static const s32 timeout_duration[] = {
5162         350000,
5163         250000,
5164         75000,
5165         37000,
5166         25000,
5167 };
5168 static const s32 period_duration[] = {
5169         400000,
5170         700000,
5171         1000000,
5172         1000000,
5173         1000000
5174 };
5175
5176 static ssize_t show_power_level(struct device *d,
5177                                 struct device_attribute *attr, char *buf)
5178 {
5179         struct iwl_priv *priv = dev_get_drvdata(d);
5180         int level = IWL_POWER_LEVEL(priv->power_mode);
5181         char *p = buf;
5182
5183         p += sprintf(p, "%d ", level);
5184         switch (level) {
5185         case IWL_POWER_MODE_CAM:
5186         case IWL39_POWER_AC:
5187                 p += sprintf(p, "(AC)");
5188                 break;
5189         case IWL39_POWER_BATTERY:
5190                 p += sprintf(p, "(BATTERY)");
5191                 break;
5192         default:
5193                 p += sprintf(p,
5194                              "(Timeout %dms, Period %dms)",
5195                              timeout_duration[level - 1] / 1000,
5196                              period_duration[level - 1] / 1000);
5197         }
5198
5199         if (!(priv->power_mode & IWL_POWER_ENABLED))
5200                 p += sprintf(p, " OFF\n");
5201         else
5202                 p += sprintf(p, " \n");
5203
5204         return p - buf + 1;
5205
5206 }
5207
5208 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
5209                    store_power_level);
5210
5211 static ssize_t show_channels(struct device *d,
5212                              struct device_attribute *attr, char *buf)
5213 {
5214         /* all this shit doesn't belong into sysfs anyway */
5215         return 0;
5216 }
5217
5218 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
5219
5220 static ssize_t show_statistics(struct device *d,
5221                                struct device_attribute *attr, char *buf)
5222 {
5223         struct iwl_priv *priv = dev_get_drvdata(d);
5224         u32 size = sizeof(struct iwl3945_notif_statistics);
5225         u32 len = 0, ofs = 0;
5226         u8 *data = (u8 *)&priv->statistics_39;
5227         int rc = 0;
5228
5229         if (!iwl_is_alive(priv))
5230                 return -EAGAIN;
5231
5232         mutex_lock(&priv->mutex);
5233         rc = iwl_send_statistics_request(priv, 0);
5234         mutex_unlock(&priv->mutex);
5235
5236         if (rc) {
5237                 len = sprintf(buf,
5238                               "Error sending statistics request: 0x%08X\n", rc);
5239                 return len;
5240         }
5241
5242         while (size && (PAGE_SIZE - len)) {
5243                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
5244                                    PAGE_SIZE - len, 1);
5245                 len = strlen(buf);
5246                 if (PAGE_SIZE - len)
5247                         buf[len++] = '\n';
5248
5249                 ofs += 16;
5250                 size -= min(size, 16U);
5251         }
5252
5253         return len;
5254 }
5255
5256 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
5257
5258 static ssize_t show_antenna(struct device *d,
5259                             struct device_attribute *attr, char *buf)
5260 {
5261         struct iwl_priv *priv = dev_get_drvdata(d);
5262
5263         if (!iwl_is_alive(priv))
5264                 return -EAGAIN;
5265
5266         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
5267 }
5268
5269 static ssize_t store_antenna(struct device *d,
5270                              struct device_attribute *attr,
5271                              const char *buf, size_t count)
5272 {
5273         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
5274         int ant;
5275
5276         if (count == 0)
5277                 return 0;
5278
5279         if (sscanf(buf, "%1i", &ant) != 1) {
5280                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
5281                 return count;
5282         }
5283
5284         if ((ant >= 0) && (ant <= 2)) {
5285                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
5286                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
5287         } else
5288                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
5289
5290
5291         return count;
5292 }
5293
5294 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
5295
5296 static ssize_t show_status(struct device *d,
5297                            struct device_attribute *attr, char *buf)
5298 {
5299         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
5300         if (!iwl_is_alive(priv))
5301                 return -EAGAIN;
5302         return sprintf(buf, "0x%08x\n", (int)priv->status);
5303 }
5304
5305 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
5306
5307 static ssize_t dump_error_log(struct device *d,
5308                               struct device_attribute *attr,
5309                               const char *buf, size_t count)
5310 {
5311         char *p = (char *)buf;
5312
5313         if (p[0] == '1')
5314                 iwl3945_dump_nic_error_log((struct iwl_priv *)d->driver_data);
5315
5316         return strnlen(buf, count);
5317 }
5318
5319 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
5320
5321 static ssize_t dump_event_log(struct device *d,
5322                               struct device_attribute *attr,
5323                               const char *buf, size_t count)
5324 {
5325         char *p = (char *)buf;
5326
5327         if (p[0] == '1')
5328                 iwl3945_dump_nic_event_log((struct iwl_priv *)d->driver_data);
5329
5330         return strnlen(buf, count);
5331 }
5332
5333 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
5334
5335 /*****************************************************************************
5336  *
5337  * driver setup and tear down
5338  *
5339  *****************************************************************************/
5340
5341 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
5342 {
5343         priv->workqueue = create_workqueue(DRV_NAME);
5344
5345         init_waitqueue_head(&priv->wait_command_queue);
5346
5347         INIT_WORK(&priv->up, iwl3945_bg_up);
5348         INIT_WORK(&priv->restart, iwl3945_bg_restart);
5349         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
5350         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
5351         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
5352         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
5353         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
5354         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
5355         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
5356         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
5357         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
5358         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
5359
5360         iwl3945_hw_setup_deferred_work(priv);
5361
5362         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
5363                      iwl3945_irq_tasklet, (unsigned long)priv);
5364 }
5365
5366 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
5367 {
5368         iwl3945_hw_cancel_deferred_work(priv);
5369
5370         cancel_delayed_work_sync(&priv->init_alive_start);
5371         cancel_delayed_work(&priv->scan_check);
5372         cancel_delayed_work(&priv->alive_start);
5373         cancel_work_sync(&priv->beacon_update);
5374 }
5375
5376 static struct attribute *iwl3945_sysfs_entries[] = {
5377         &dev_attr_antenna.attr,
5378         &dev_attr_channels.attr,
5379         &dev_attr_dump_errors.attr,
5380         &dev_attr_dump_events.attr,
5381         &dev_attr_flags.attr,
5382         &dev_attr_filter_flags.attr,
5383 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
5384         &dev_attr_measurement.attr,
5385 #endif
5386         &dev_attr_power_level.attr,
5387         &dev_attr_retry_rate.attr,
5388         &dev_attr_statistics.attr,
5389         &dev_attr_status.attr,
5390         &dev_attr_temperature.attr,
5391         &dev_attr_tx_power.attr,
5392 #ifdef CONFIG_IWLWIFI_DEBUG
5393         &dev_attr_debug_level.attr,
5394 #endif
5395         NULL
5396 };
5397
5398 static struct attribute_group iwl3945_attribute_group = {
5399         .name = NULL,           /* put in device directory */
5400         .attrs = iwl3945_sysfs_entries,
5401 };
5402
5403 static struct ieee80211_ops iwl3945_hw_ops = {
5404         .tx = iwl3945_mac_tx,
5405         .start = iwl3945_mac_start,
5406         .stop = iwl3945_mac_stop,
5407         .add_interface = iwl3945_mac_add_interface,
5408         .remove_interface = iwl3945_mac_remove_interface,
5409         .config = iwl3945_mac_config,
5410         .config_interface = iwl3945_mac_config_interface,
5411         .configure_filter = iwl_configure_filter,
5412         .set_key = iwl3945_mac_set_key,
5413         .get_tx_stats = iwl3945_mac_get_tx_stats,
5414         .conf_tx = iwl3945_mac_conf_tx,
5415         .reset_tsf = iwl3945_mac_reset_tsf,
5416         .bss_info_changed = iwl3945_bss_info_changed,
5417         .hw_scan = iwl3945_mac_hw_scan
5418 };
5419
5420 static int iwl3945_init_drv(struct iwl_priv *priv)
5421 {
5422         int ret;
5423         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
5424
5425         priv->retry_rate = 1;
5426         priv->ibss_beacon = NULL;
5427
5428         spin_lock_init(&priv->lock);
5429         spin_lock_init(&priv->power_data.lock);
5430         spin_lock_init(&priv->sta_lock);
5431         spin_lock_init(&priv->hcmd_lock);
5432
5433         INIT_LIST_HEAD(&priv->free_frames);
5434
5435         mutex_init(&priv->mutex);
5436
5437         /* Clear the driver's (not device's) station table */
5438         iwl3945_clear_stations_table(priv);
5439
5440         priv->data_retry_limit = -1;
5441         priv->ieee_channels = NULL;
5442         priv->ieee_rates = NULL;
5443         priv->band = IEEE80211_BAND_2GHZ;
5444
5445         priv->iw_mode = NL80211_IFTYPE_STATION;
5446
5447         iwl_reset_qos(priv);
5448
5449         priv->qos_data.qos_active = 0;
5450         priv->qos_data.qos_cap.val = 0;
5451
5452         priv->rates_mask = IWL_RATES_MASK;
5453         /* If power management is turned on, default to AC mode */
5454         priv->power_mode = IWL39_POWER_AC;
5455         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
5456
5457         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
5458                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
5459                          eeprom->version);
5460                 ret = -EINVAL;
5461                 goto err;
5462         }
5463         ret = iwl_init_channel_map(priv);
5464         if (ret) {
5465                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
5466                 goto err;
5467         }
5468
5469         /* Set up txpower settings in driver for all channels */
5470         if (iwl3945_txpower_set_from_eeprom(priv)) {
5471                 ret = -EIO;
5472                 goto err_free_channel_map;
5473         }
5474
5475         ret = iwlcore_init_geos(priv);
5476         if (ret) {
5477                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
5478                 goto err_free_channel_map;
5479         }
5480         iwl3945_init_hw_rates(priv, priv->ieee_rates);
5481
5482         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5483                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5484                         &priv->bands[IEEE80211_BAND_2GHZ];
5485         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5486                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5487                         &priv->bands[IEEE80211_BAND_5GHZ];
5488
5489         return 0;
5490
5491 err_free_channel_map:
5492         iwl_free_channel_map(priv);
5493 err:
5494         return ret;
5495 }
5496
5497 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
5498 {
5499         int err = 0;
5500         struct iwl_priv *priv;
5501         struct ieee80211_hw *hw;
5502         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
5503         struct iwl3945_eeprom *eeprom;
5504         unsigned long flags;
5505
5506         /***********************
5507          * 1. Allocating HW data
5508          * ********************/
5509
5510         /* mac80211 allocates memory for this device instance, including
5511          *   space for this driver's private structure */
5512         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
5513         if (hw == NULL) {
5514                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
5515                 err = -ENOMEM;
5516                 goto out;
5517         }
5518         priv = hw->priv;
5519         SET_IEEE80211_DEV(hw, &pdev->dev);
5520
5521         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
5522              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
5523                 IWL_ERR(priv,
5524                         "invalid queues_num, should be between %d and %d\n",
5525                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
5526                 err = -EINVAL;
5527                 goto out;
5528         }
5529
5530         /*
5531          * Disabling hardware scan means that mac80211 will perform scans
5532          * "the hard way", rather than using device's scan.
5533          */
5534         if (iwl3945_mod_params.disable_hw_scan) {
5535                 IWL_DEBUG_INFO("Disabling hw_scan\n");
5536                 iwl3945_hw_ops.hw_scan = NULL;
5537         }
5538
5539
5540         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
5541         priv->cfg = cfg;
5542         priv->pci_dev = pdev;
5543
5544 #ifdef CONFIG_IWLWIFI_DEBUG
5545         priv->debug_level = iwl3945_mod_params.debug;
5546         atomic_set(&priv->restrict_refcnt, 0);
5547 #endif
5548         hw->rate_control_algorithm = "iwl-3945-rs";
5549         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
5550
5551         /* Tell mac80211 our characteristics */
5552         hw->flags = IEEE80211_HW_SIGNAL_DBM |
5553                     IEEE80211_HW_NOISE_DBM;
5554
5555         hw->wiphy->interface_modes =
5556                 BIT(NL80211_IFTYPE_STATION) |
5557                 BIT(NL80211_IFTYPE_ADHOC);
5558
5559         hw->wiphy->custom_regulatory = true;
5560
5561         /* 4 EDCA QOS priorities */
5562         hw->queues = 4;
5563
5564         /***************************
5565          * 2. Initializing PCI bus
5566          * *************************/
5567         if (pci_enable_device(pdev)) {
5568                 err = -ENODEV;
5569                 goto out_ieee80211_free_hw;
5570         }
5571
5572         pci_set_master(pdev);
5573
5574         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
5575         if (!err)
5576                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
5577         if (err) {
5578                 IWL_WARN(priv, "No suitable DMA available.\n");
5579                 goto out_pci_disable_device;
5580         }
5581
5582         pci_set_drvdata(pdev, priv);
5583         err = pci_request_regions(pdev, DRV_NAME);
5584         if (err)
5585                 goto out_pci_disable_device;
5586
5587         /***********************
5588          * 3. Read REV Register
5589          * ********************/
5590         priv->hw_base = pci_iomap(pdev, 0, 0);
5591         if (!priv->hw_base) {
5592                 err = -ENODEV;
5593                 goto out_pci_release_regions;
5594         }
5595
5596         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
5597                         (unsigned long long) pci_resource_len(pdev, 0));
5598         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
5599
5600         /* We disable the RETRY_TIMEOUT register (0x41) to keep
5601          * PCI Tx retries from interfering with C3 CPU state */
5602         pci_write_config_byte(pdev, 0x41, 0x00);
5603
5604         /* amp init */
5605         err = priv->cfg->ops->lib->apm_ops.init(priv);
5606         if (err < 0) {
5607                 IWL_DEBUG_INFO("Failed to init APMG\n");
5608                 goto out_iounmap;
5609         }
5610
5611         /***********************
5612          * 4. Read EEPROM
5613          * ********************/
5614
5615         /* Read the EEPROM */
5616         err = iwl_eeprom_init(priv);
5617         if (err) {
5618                 IWL_ERR(priv, "Unable to init EEPROM\n");
5619                 goto out_remove_sysfs;
5620         }
5621         /* MAC Address location in EEPROM same for 3945/4965 */
5622         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
5623         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
5624         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
5625         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
5626
5627         /***********************
5628          * 5. Setup HW Constants
5629          * ********************/
5630         /* Device-specific setup */
5631         if (iwl3945_hw_set_hw_params(priv)) {
5632                 IWL_ERR(priv, "failed to set hw settings\n");
5633                 goto out_iounmap;
5634         }
5635
5636         /***********************
5637          * 6. Setup priv
5638          * ********************/
5639
5640         err = iwl3945_init_drv(priv);
5641         if (err) {
5642                 IWL_ERR(priv, "initializing driver failed\n");
5643                 goto out_free_geos;
5644         }
5645
5646         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
5647                 priv->cfg->name);
5648
5649         /***********************************
5650          * 7. Initialize Module Parameters
5651          * **********************************/
5652
5653         /* Initialize module parameter values here */
5654         /* Disable radio (SW RF KILL) via parameter when loading driver */
5655         if (iwl3945_mod_params.disable) {
5656                 set_bit(STATUS_RF_KILL_SW, &priv->status);
5657                 IWL_DEBUG_INFO("Radio disabled.\n");
5658         }
5659
5660
5661         /***********************
5662          * 8. Setup Services
5663          * ********************/
5664
5665         spin_lock_irqsave(&priv->lock, flags);
5666         iwl3945_disable_interrupts(priv);
5667         spin_unlock_irqrestore(&priv->lock, flags);
5668
5669         pci_enable_msi(priv->pci_dev);
5670
5671         err = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
5672                           DRV_NAME, priv);
5673         if (err) {
5674                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
5675                 goto out_disable_msi;
5676         }
5677
5678         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
5679         if (err) {
5680                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
5681                 goto out_release_irq;
5682         }
5683
5684         iwl_set_rxon_channel(priv,
5685                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
5686         iwl3945_setup_deferred_work(priv);
5687         iwl3945_setup_rx_handlers(priv);
5688
5689         /*********************************
5690          * 9. Setup and Register mac80211
5691          * *******************************/
5692
5693         err = ieee80211_register_hw(priv->hw);
5694         if (err) {
5695                 IWL_ERR(priv, "Failed to register network device: %d\n", err);
5696                 goto  out_remove_sysfs;
5697         }
5698
5699         priv->hw->conf.beacon_int = 100;
5700         priv->mac80211_registered = 1;
5701
5702         err = iwl_rfkill_init(priv);
5703         if (err)
5704                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
5705                                   "Ignoring error: %d\n", err);
5706
5707         /* Start monitoring the killswitch */
5708         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
5709                            2 * HZ);
5710
5711         return 0;
5712
5713  out_remove_sysfs:
5714         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
5715  out_free_geos:
5716         iwlcore_free_geos(priv);
5717
5718  out_release_irq:
5719         free_irq(priv->pci_dev->irq, priv);
5720         destroy_workqueue(priv->workqueue);
5721         priv->workqueue = NULL;
5722         iwl3945_unset_hw_params(priv);
5723  out_disable_msi:
5724         pci_disable_msi(priv->pci_dev);
5725  out_iounmap:
5726         pci_iounmap(pdev, priv->hw_base);
5727  out_pci_release_regions:
5728         pci_release_regions(pdev);
5729  out_pci_disable_device:
5730         pci_disable_device(pdev);
5731         pci_set_drvdata(pdev, NULL);
5732  out_ieee80211_free_hw:
5733         ieee80211_free_hw(priv->hw);
5734  out:
5735         return err;
5736 }
5737
5738 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
5739 {
5740         struct iwl_priv *priv = pci_get_drvdata(pdev);
5741         unsigned long flags;
5742
5743         if (!priv)
5744                 return;
5745
5746         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
5747
5748         set_bit(STATUS_EXIT_PENDING, &priv->status);
5749
5750         if (priv->mac80211_registered) {
5751                 ieee80211_unregister_hw(priv->hw);
5752                 priv->mac80211_registered = 0;
5753         } else {
5754                 iwl3945_down(priv);
5755         }
5756
5757         /* make sure we flush any pending irq or
5758          * tasklet for the driver
5759          */
5760         spin_lock_irqsave(&priv->lock, flags);
5761         iwl3945_disable_interrupts(priv);
5762         spin_unlock_irqrestore(&priv->lock, flags);
5763
5764         iwl_synchronize_irq(priv);
5765
5766         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
5767
5768         iwl_rfkill_unregister(priv);
5769         cancel_delayed_work(&priv->rfkill_poll);
5770
5771         iwl3945_dealloc_ucode_pci(priv);
5772
5773         if (priv->rxq.bd)
5774                 iwl_rx_queue_free(priv, &priv->rxq);
5775         iwl3945_hw_txq_ctx_free(priv);
5776
5777         iwl3945_unset_hw_params(priv);
5778         iwl3945_clear_stations_table(priv);
5779
5780         /*netif_stop_queue(dev); */
5781         flush_workqueue(priv->workqueue);
5782
5783         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
5784          * priv->workqueue... so we can't take down the workqueue
5785          * until now... */
5786         destroy_workqueue(priv->workqueue);
5787         priv->workqueue = NULL;
5788
5789         free_irq(pdev->irq, priv);
5790         pci_disable_msi(pdev);
5791
5792         pci_iounmap(pdev, priv->hw_base);
5793         pci_release_regions(pdev);
5794         pci_disable_device(pdev);
5795         pci_set_drvdata(pdev, NULL);
5796
5797         iwl_free_channel_map(priv);
5798         iwlcore_free_geos(priv);
5799         kfree(priv->scan);
5800         if (priv->ibss_beacon)
5801                 dev_kfree_skb(priv->ibss_beacon);
5802
5803         ieee80211_free_hw(priv->hw);
5804 }
5805
5806 #ifdef CONFIG_PM
5807
5808 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
5809 {
5810         struct iwl_priv *priv = pci_get_drvdata(pdev);
5811
5812         if (priv->is_open) {
5813                 set_bit(STATUS_IN_SUSPEND, &priv->status);
5814                 iwl3945_mac_stop(priv->hw);
5815                 priv->is_open = 1;
5816         }
5817         pci_save_state(pdev);
5818         pci_disable_device(pdev);
5819         pci_set_power_state(pdev, PCI_D3hot);
5820
5821         return 0;
5822 }
5823
5824 static int iwl3945_pci_resume(struct pci_dev *pdev)
5825 {
5826         struct iwl_priv *priv = pci_get_drvdata(pdev);
5827
5828         pci_set_power_state(pdev, PCI_D0);
5829         pci_enable_device(pdev);
5830         pci_restore_state(pdev);
5831
5832         if (priv->is_open)
5833                 iwl3945_mac_start(priv->hw);
5834
5835         clear_bit(STATUS_IN_SUSPEND, &priv->status);
5836         return 0;
5837 }
5838
5839 #endif /* CONFIG_PM */
5840
5841 /*****************************************************************************
5842  *
5843  * driver and module entry point
5844  *
5845  *****************************************************************************/
5846
5847 static struct pci_driver iwl3945_driver = {
5848         .name = DRV_NAME,
5849         .id_table = iwl3945_hw_card_ids,
5850         .probe = iwl3945_pci_probe,
5851         .remove = __devexit_p(iwl3945_pci_remove),
5852 #ifdef CONFIG_PM
5853         .suspend = iwl3945_pci_suspend,
5854         .resume = iwl3945_pci_resume,
5855 #endif
5856 };
5857
5858 static int __init iwl3945_init(void)
5859 {
5860
5861         int ret;
5862         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
5863         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
5864
5865         ret = iwl3945_rate_control_register();
5866         if (ret) {
5867                 printk(KERN_ERR DRV_NAME
5868                        "Unable to register rate control algorithm: %d\n", ret);
5869                 return ret;
5870         }
5871
5872         ret = pci_register_driver(&iwl3945_driver);
5873         if (ret) {
5874                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
5875                 goto error_register;
5876         }
5877
5878         return ret;
5879
5880 error_register:
5881         iwl3945_rate_control_unregister();
5882         return ret;
5883 }
5884
5885 static void __exit iwl3945_exit(void)
5886 {
5887         pci_unregister_driver(&iwl3945_driver);
5888         iwl3945_rate_control_unregister();
5889 }
5890
5891 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
5892
5893 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
5894 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
5895 module_param_named(disable, iwl3945_mod_params.disable, int, 0444);
5896 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
5897 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
5898 MODULE_PARM_DESC(swcrypto,
5899                  "using software crypto (default 1 [software])\n");
5900 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
5901 MODULE_PARM_DESC(debug, "debug output mask");
5902 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
5903 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
5904
5905 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
5906 MODULE_PARM_DESC(queues_num, "number of hw queues.");
5907
5908 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
5909 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
5910
5911 module_exit(iwl3945_exit);
5912 module_init(iwl3945_init);