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