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_NUM_QUEUES, /* Not used */
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /**
  99  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 100  * @priv: eeprom and antenna fields are used to determine antenna flags
 101  *
 102  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 103  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 104  *
 105  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 106  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 107  * IWL_ANTENNA_AUX       - Force AUX antenna
 108  */
 109 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 110 {
 111         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 112
 113         switch (iwl3945_mod_params.antenna) {
 114         case IWL_ANTENNA_DIVERSITY:
 115                 return 0;
 116
 117         case IWL_ANTENNA_MAIN:
 118                 if (eeprom->antenna_switch_type)
 119                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 120                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 121
 122         case IWL_ANTENNA_AUX:
 123                 if (eeprom->antenna_switch_type)
 124                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 125                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 126         }
 127
 128         /* bad antenna selector value */
 129         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 130                 iwl3945_mod_params.antenna);
 131
 132         return 0;               /* "diversity" is default if error */
 133 }
 134
 135 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 136                                    struct ieee80211_key_conf *keyconf,
 137                                    u8 sta_id)
 138 {
 139         unsigned long flags;
 140         __le16 key_flags = 0;
 141         int ret;
 142
 143         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 144         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 145
 146         if (sta_id == priv->hw_params.bcast_sta_id)
 147                 key_flags |= STA_KEY_MULTICAST_MSK;
 148
 149         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 150         keyconf->hw_key_idx = keyconf->keyidx;
 151         key_flags &= ~STA_KEY_FLG_INVALID;
 152
 153         spin_lock_irqsave(&priv->sta_lock, flags);
 154         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 155         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 156         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 157                keyconf->keylen);
 158
 159         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 160                keyconf->keylen);
 161
 162         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 163                         == STA_KEY_FLG_NO_ENC)
 164                 priv->stations[sta_id].sta.key.key_offset =
 165                                  iwl_get_free_ucode_key_index(priv);
 166         /* else, we are overriding an existing key => no need to allocated room
 167         * in uCode. */
 168
 169         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 170                 "no space for a new key");
 171
 172         priv->stations[sta_id].sta.key.key_flags = key_flags;
 173         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 174         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 175
 176         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 177
 178         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 179
 180         spin_unlock_irqrestore(&priv->sta_lock, flags);
 181
 182         return ret;
 183 }
 184
 185 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 186                                   struct ieee80211_key_conf *keyconf,
 187                                   u8 sta_id)
 188 {
 189         return -EOPNOTSUPP;
 190 }
 191
 192 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 193                                   struct ieee80211_key_conf *keyconf,
 194                                   u8 sta_id)
 195 {
 196         return -EOPNOTSUPP;
 197 }
 198
 199 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 200 {
 201         unsigned long flags;
 202
 203         spin_lock_irqsave(&priv->sta_lock, flags);
 204         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 205         memset(&priv->stations[sta_id].sta.key, 0,
 206                 sizeof(struct iwl4965_keyinfo));
 207         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 208         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 209         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 210         spin_unlock_irqrestore(&priv->sta_lock, flags);
 211
 212         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 213         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 214         return 0;
 215 }
 216
 217 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 218                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 219 {
 220         int ret = 0;
 221
 222         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 223
 224         switch (keyconf->alg) {
 225         case ALG_CCMP:
 226                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 227                 break;
 228         case ALG_TKIP:
 229                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         case ALG_WEP:
 232                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 233                 break;
 234         default:
 235                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 236                 ret = -EINVAL;
 237         }
 238
 239         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 240                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 241                       sta_id, ret);
 242
 243         return ret;
 244 }
 245
 246 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 247 {
 248         int ret = -EOPNOTSUPP;
 249
 250         return ret;
 251 }
 252
 253 static int iwl3945_set_static_key(struct iwl_priv *priv,
 254                                 struct ieee80211_key_conf *key)
 255 {
 256         if (key->alg == ALG_WEP)
 257                 return -EOPNOTSUPP;
 258
 259         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 260         return -EINVAL;
 261 }
 262
 263 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 264 {
 265         struct list_head *element;
 266
 267         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 268                        priv->frames_count);
 269
 270         while (!list_empty(&priv->free_frames)) {
 271                 element = priv->free_frames.next;
 272                 list_del(element);
 273                 kfree(list_entry(element, struct iwl3945_frame, list));
 274                 priv->frames_count--;
 275         }
 276
 277         if (priv->frames_count) {
 278                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 279                             priv->frames_count);
 280                 priv->frames_count = 0;
 281         }
 282 }
 283
 284 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 285 {
 286         struct iwl3945_frame *frame;
 287         struct list_head *element;
 288         if (list_empty(&priv->free_frames)) {
 289                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 290                 if (!frame) {
 291                         IWL_ERR(priv, "Could not allocate frame!\n");
 292                         return NULL;
 293                 }
 294
 295                 priv->frames_count++;
 296                 return frame;
 297         }
 298
 299         element = priv->free_frames.next;
 300         list_del(element);
 301         return list_entry(element, struct iwl3945_frame, list);
 302 }
 303
 304 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 305 {
 306         memset(frame, 0, sizeof(*frame));
 307         list_add(&frame->list, &priv->free_frames);
 308 }
 309
 310 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 311                                 struct ieee80211_hdr *hdr,
 312                                 int left)
 313 {
 314
 315         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 316             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 317              (priv->iw_mode != NL80211_IFTYPE_AP)))
 318                 return 0;
 319
 320         if (priv->ibss_beacon->len > left)
 321                 return 0;
 322
 323         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 324
 325         return priv->ibss_beacon->len;
 326 }
 327
 328 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 329 {
 330         struct iwl3945_frame *frame;
 331         unsigned int frame_size;
 332         int rc;
 333         u8 rate;
 334
 335         frame = iwl3945_get_free_frame(priv);
 336
 337         if (!frame) {
 338                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 339                           "command.\n");
 340                 return -ENOMEM;
 341         }
 342
 343         rate = iwl_rate_get_lowest_plcp(priv);
 344
 345         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 346
 347         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 348                               &frame->u.cmd[0]);
 349
 350         iwl3945_free_frame(priv, frame);
 351
 352         return rc;
 353 }
 354
 355 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 356 {
 357         if (priv->shared_virt)
 358                 pci_free_consistent(priv->pci_dev,
 359                                     sizeof(struct iwl3945_shared),
 360                                     priv->shared_virt,
 361                                     priv->shared_phys);
 362 }
 363
 364 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 365                                       struct ieee80211_tx_info *info,
 366                                       struct iwl_device_cmd *cmd,
 367                                       struct sk_buff *skb_frag,
 368                                       int sta_id)
 369 {
 370         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 371         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 372
 373         switch (keyinfo->alg) {
 374         case ALG_CCMP:
 375                 tx->sec_ctl = TX_CMD_SEC_CCM;
 376                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 377                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 378                 break;
 379
 380         case ALG_TKIP:
 381                 break;
 382
 383         case ALG_WEP:
 384                 tx->sec_ctl = TX_CMD_SEC_WEP |
 385                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 386
 387                 if (keyinfo->keylen == 13)
 388                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 389
 390                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 391
 392                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 393                              "with key %d\n", info->control.hw_key->hw_key_idx);
 394                 break;
 395
 396         default:
 397                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 398                 break;
 399         }
 400 }
 401
 402 /*
 403  * handle build REPLY_TX command notification.
 404  */
 405 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 406                                   struct iwl_device_cmd *cmd,
 407                                   struct ieee80211_tx_info *info,
 408                                   struct ieee80211_hdr *hdr, u8 std_id)
 409 {
 410         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 411         __le32 tx_flags = tx->tx_flags;
 412         __le16 fc = hdr->frame_control;
 413         u8 rc_flags = info->control.rates[0].flags;
 414
 415         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 416         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 417                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 418                 if (ieee80211_is_mgmt(fc))
 419                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 420                 if (ieee80211_is_probe_resp(fc) &&
 421                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 422                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 423         } else {
 424                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 425                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 426         }
 427
 428         tx->sta_id = std_id;
 429         if (ieee80211_has_morefrags(fc))
 430                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 431
 432         if (ieee80211_is_data_qos(fc)) {
 433                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 434                 tx->tid_tspec = qc[0] & 0xf;
 435                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 436         } else {
 437                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 438         }
 439
 440         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 441                 tx_flags |= TX_CMD_FLG_RTS_MSK;
 442                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 443         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 444                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 445                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 446         }
 447
 448         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 449                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 450
 451         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 452         if (ieee80211_is_mgmt(fc)) {
 453                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 454                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
 455                 else
 456                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
 457         } else {
 458                 tx->timeout.pm_frame_timeout = 0;
 459 #ifdef CONFIG_IWLWIFI_LEDS
 460                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
 461 #endif
 462         }
 463
 464         tx->driver_txop = 0;
 465         tx->tx_flags = tx_flags;
 466         tx->next_frame_len = 0;
 467 }
 468
 469 /*
 470  * start REPLY_TX command process
 471  */
 472 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 473 {
 474         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 475         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 476         struct iwl3945_tx_cmd *tx;
 477         struct iwl_tx_queue *txq = NULL;
 478         struct iwl_queue *q = NULL;
 479         struct iwl_device_cmd *out_cmd;
 480         struct iwl_cmd_meta *out_meta;
 481         dma_addr_t phys_addr;
 482         dma_addr_t txcmd_phys;
 483         int txq_id = skb_get_queue_mapping(skb);
 484         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 485         u8 id;
 486         u8 unicast;
 487         u8 sta_id;
 488         u8 tid = 0;
 489         u16 seq_number = 0;
 490         __le16 fc;
 491         u8 wait_write_ptr = 0;
 492         u8 *qc = NULL;
 493         unsigned long flags;
 494         int rc;
 495
 496         spin_lock_irqsave(&priv->lock, flags);
 497         if (iwl_is_rfkill(priv)) {
 498                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 499                 goto drop_unlock;
 500         }
 501
 502         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 503                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 504                 goto drop_unlock;
 505         }
 506
 507         unicast = !is_multicast_ether_addr(hdr->addr1);
 508         id = 0;
 509
 510         fc = hdr->frame_control;
 511
 512 #ifdef CONFIG_IWLWIFI_DEBUG
 513         if (ieee80211_is_auth(fc))
 514                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 515         else if (ieee80211_is_assoc_req(fc))
 516                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 517         else if (ieee80211_is_reassoc_req(fc))
 518                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 519 #endif
 520
 521         /* drop all data frame if we are not associated */
 522         if (ieee80211_is_data(fc) &&
 523             (!iwl_is_monitor_mode(priv)) && /* packet injection */
 524             (!iwl_is_associated(priv) ||
 525              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 526                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 527                 goto drop_unlock;
 528         }
 529
 530         spin_unlock_irqrestore(&priv->lock, flags);
 531
 532         hdr_len = ieee80211_hdrlen(fc);
 533
 534         /* Find (or create) index into station table for destination station */
 535         sta_id = iwl_get_sta_id(priv, hdr);
 536         if (sta_id == IWL_INVALID_STATION) {
 537                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 538                                hdr->addr1);
 539                 goto drop;
 540         }
 541
 542         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 543
 544         if (ieee80211_is_data_qos(fc)) {
 545                 qc = ieee80211_get_qos_ctl(hdr);
 546                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 547                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 548                                 IEEE80211_SCTL_SEQ;
 549                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 550                         (hdr->seq_ctrl &
 551                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 552                 seq_number += 0x10;
 553         }
 554
 555         /* Descriptor for chosen Tx queue */
 556         txq = &priv->txq[txq_id];
 557         q = &txq->q;
 558
 559         spin_lock_irqsave(&priv->lock, flags);
 560
 561         idx = get_cmd_index(q, q->write_ptr, 0);
 562
 563         /* Set up driver data for this TFD */
 564         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 565         txq->txb[q->write_ptr].skb[0] = skb;
 566
 567         /* Init first empty entry in queue's array of Tx/cmd buffers */
 568         out_cmd = txq->cmd[idx];
 569         out_meta = &txq->meta[idx];
 570         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 571         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 572         memset(tx, 0, sizeof(*tx));
 573
 574         /*
 575          * Set up the Tx-command (not MAC!) header.
 576          * Store the chosen Tx queue and TFD index within the sequence field;
 577          * after Tx, uCode's Tx response will return this value so driver can
 578          * locate the frame within the tx queue and do post-tx processing.
 579          */
 580         out_cmd->hdr.cmd = REPLY_TX;
 581         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 582                                 INDEX_TO_SEQ(q->write_ptr)));
 583
 584         /* Copy MAC header from skb into command buffer */
 585         memcpy(tx->hdr, hdr, hdr_len);
 586
 587
 588         if (info->control.hw_key)
 589                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 590
 591         /* TODO need this for burst mode later on */
 592         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 593
 594         /* set is_hcca to 0; it probably will never be implemented */
 595         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 596
 597         /* Total # bytes to be transmitted */
 598         len = (u16)skb->len;
 599         tx->len = cpu_to_le16(len);
 600
 601         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 602         iwl_update_stats(priv, true, fc, len);
 603         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 604         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 605
 606         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 607                 txq->need_update = 1;
 608                 if (qc)
 609                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 610         } else {
 611                 wait_write_ptr = 1;
 612                 txq->need_update = 0;
 613         }
 614
 615         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 616                      le16_to_cpu(out_cmd->hdr.sequence));
 617         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 618         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 619         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 620                            ieee80211_hdrlen(fc));
 621
 622         /*
 623          * Use the first empty entry in this queue's command buffer array
 624          * to contain the Tx command and MAC header concatenated together
 625          * (payload data will be in another buffer).
 626          * Size of this varies, due to varying MAC header length.
 627          * If end is not dword aligned, we'll have 2 extra bytes at the end
 628          * of the MAC header (device reads on dword boundaries).
 629          * We'll tell device about this padding later.
 630          */
 631         len = sizeof(struct iwl3945_tx_cmd) +
 632                         sizeof(struct iwl_cmd_header) + hdr_len;
 633
 634         len_org = len;
 635         len = (len + 3) & ~3;
 636
 637         if (len_org != len)
 638                 len_org = 1;
 639         else
 640                 len_org = 0;
 641
 642         /* Physical address of this Tx command's header (not MAC header!),
 643          * within command buffer array. */
 644         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 645                                     len, PCI_DMA_TODEVICE);
 646         /* we do not map meta data ... so we can safely access address to
 647          * provide to unmap command*/
 648         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 649         pci_unmap_len_set(out_meta, len, len);
 650
 651         /* Add buffer containing Tx command and MAC(!) header to TFD's
 652          * first entry */
 653         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 654                                                    txcmd_phys, len, 1, 0);
 655
 656
 657         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 658          * if any (802.11 null frames have no payload). */
 659         len = skb->len - hdr_len;
 660         if (len) {
 661                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 662                                            len, PCI_DMA_TODEVICE);
 663                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 664                                                            phys_addr, len,
 665                                                            0, U32_PAD(len));
 666         }
 667
 668
 669         /* Tell device the write index *just past* this latest filled TFD */
 670         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 671         rc = iwl_txq_update_write_ptr(priv, txq);
 672         spin_unlock_irqrestore(&priv->lock, flags);
 673
 674         if (rc)
 675                 return rc;
 676
 677         if ((iwl_queue_space(q) < q->high_mark)
 678             && priv->mac80211_registered) {
 679                 if (wait_write_ptr) {
 680                         spin_lock_irqsave(&priv->lock, flags);
 681                         txq->need_update = 1;
 682                         iwl_txq_update_write_ptr(priv, txq);
 683                         spin_unlock_irqrestore(&priv->lock, flags);
 684                 }
 685
 686                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 687         }
 688
 689         return 0;
 690
 691 drop_unlock:
 692         spin_unlock_irqrestore(&priv->lock, flags);
 693 drop:
 694         return -1;
 695 }
 696
 697 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 698
 699 #include "iwl-spectrum.h"
 700
 701 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 702 #define BEACON_TIME_MASK_HIGH   0xFF000000
 703 #define TIME_UNIT               1024
 704
 705 /*
 706  * extended beacon time format
 707  * time in usec will be changed into a 32-bit value in 8:24 format
 708  * the high 1 byte is the beacon counts
 709  * the lower 3 bytes is the time in usec within one beacon interval
 710  */
 711
 712 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 713 {
 714         u32 quot;
 715         u32 rem;
 716         u32 interval = beacon_interval * 1024;
 717
 718         if (!interval || !usec)
 719                 return 0;
 720
 721         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 722         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 723
 724         return (quot << 24) + rem;
 725 }
 726
 727 /* base is usually what we get from ucode with each received frame,
 728  * the same as HW timer counter counting down
 729  */
 730
 731 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 732 {
 733         u32 base_low = base & BEACON_TIME_MASK_LOW;
 734         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 735         u32 interval = beacon_interval * TIME_UNIT;
 736         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 737             (addon & BEACON_TIME_MASK_HIGH);
 738
 739         if (base_low > addon_low)
 740                 res += base_low - addon_low;
 741         else if (base_low < addon_low) {
 742                 res += interval + base_low - addon_low;
 743                 res += (1 << 24);
 744         } else
 745                 res += (1 << 24);
 746
 747         return cpu_to_le32(res);
 748 }
 749
 750 static int iwl3945_get_measurement(struct iwl_priv *priv,
 751                                struct ieee80211_measurement_params *params,
 752                                u8 type)
 753 {
 754         struct iwl_spectrum_cmd spectrum;
 755         struct iwl_rx_packet *res;
 756         struct iwl_host_cmd cmd = {
 757                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 758                 .data = (void *)&spectrum,
 759                 .flags = CMD_WANT_SKB,
 760         };
 761         u32 add_time = le64_to_cpu(params->start_time);
 762         int rc;
 763         int spectrum_resp_status;
 764         int duration = le16_to_cpu(params->duration);
 765
 766         if (iwl_is_associated(priv))
 767                 add_time =
 768                     iwl3945_usecs_to_beacons(
 769                         le64_to_cpu(params->start_time) - priv->last_tsf,
 770                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 771
 772         memset(&spectrum, 0, sizeof(spectrum));
 773
 774         spectrum.channel_count = cpu_to_le16(1);
 775         spectrum.flags =
 776             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 777         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 778         cmd.len = sizeof(spectrum);
 779         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 780
 781         if (iwl_is_associated(priv))
 782                 spectrum.start_time =
 783                     iwl3945_add_beacon_time(priv->last_beacon_time,
 784                                 add_time,
 785                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 786         else
 787                 spectrum.start_time = 0;
 788
 789         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 790         spectrum.channels[0].channel = params->channel;
 791         spectrum.channels[0].type = type;
 792         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 793                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 794                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 795
 796         rc = iwl_send_cmd_sync(priv, &cmd);
 797         if (rc)
 798                 return rc;
 799
 800         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
 801         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 802                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 803                 rc = -EIO;
 804         }
 805
 806         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
 807         switch (spectrum_resp_status) {
 808         case 0:         /* Command will be handled */
 809                 if (res->u.spectrum.id != 0xff) {
 810                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 811                                                 res->u.spectrum.id);
 812                         priv->measurement_status &= ~MEASUREMENT_READY;
 813                 }
 814                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 815                 rc = 0;
 816                 break;
 817
 818         case 1:         /* Command will not be handled */
 819                 rc = -EAGAIN;
 820                 break;
 821         }
 822
 823         dev_kfree_skb_any(cmd.reply_skb);
 824
 825         return rc;
 826 }
 827 #endif
 828
 829 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 830                                struct iwl_rx_mem_buffer *rxb)
 831 {
 832         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 833         struct iwl_alive_resp *palive;
 834         struct delayed_work *pwork;
 835
 836         palive = &pkt->u.alive_frame;
 837
 838         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 839                        "0x%01X 0x%01X\n",
 840                        palive->is_valid, palive->ver_type,
 841                        palive->ver_subtype);
 842
 843         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 844                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 845                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 846                        sizeof(struct iwl_alive_resp));
 847                 pwork = &priv->init_alive_start;
 848         } else {
 849                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 850                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 851                        sizeof(struct iwl_alive_resp));
 852                 pwork = &priv->alive_start;
 853                 iwl3945_disable_events(priv);
 854         }
 855
 856         /* We delay the ALIVE response by 5ms to
 857          * give the HW RF Kill time to activate... */
 858         if (palive->is_valid == UCODE_VALID_OK)
 859                 queue_delayed_work(priv->workqueue, pwork,
 860                                    msecs_to_jiffies(5));
 861         else
 862                 IWL_WARN(priv, "uCode did not respond OK.\n");
 863 }
 864
 865 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 866                                  struct iwl_rx_mem_buffer *rxb)
 867 {
 868 #ifdef CONFIG_IWLWIFI_DEBUG
 869         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 870 #endif
 871
 872         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 873         return;
 874 }
 875
 876 static void iwl3945_bg_beacon_update(struct work_struct *work)
 877 {
 878         struct iwl_priv *priv =
 879                 container_of(work, struct iwl_priv, beacon_update);
 880         struct sk_buff *beacon;
 881
 882         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 883         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 884
 885         if (!beacon) {
 886                 IWL_ERR(priv, "update beacon failed\n");
 887                 return;
 888         }
 889
 890         mutex_lock(&priv->mutex);
 891         /* new beacon skb is allocated every time; dispose previous.*/
 892         if (priv->ibss_beacon)
 893                 dev_kfree_skb(priv->ibss_beacon);
 894
 895         priv->ibss_beacon = beacon;
 896         mutex_unlock(&priv->mutex);
 897
 898         iwl3945_send_beacon_cmd(priv);
 899 }
 900
 901 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 902                                 struct iwl_rx_mem_buffer *rxb)
 903 {
 904 #ifdef CONFIG_IWLWIFI_DEBUG
 905         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 906         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 907         u8 rate = beacon->beacon_notify_hdr.rate;
 908
 909         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 910                 "tsf %d %d rate %d\n",
 911                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 912                 beacon->beacon_notify_hdr.failure_frame,
 913                 le32_to_cpu(beacon->ibss_mgr_status),
 914                 le32_to_cpu(beacon->high_tsf),
 915                 le32_to_cpu(beacon->low_tsf), rate);
 916 #endif
 917
 918         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 919             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 920                 queue_work(priv->workqueue, &priv->beacon_update);
 921 }
 922
 923 /* Handle notification from uCode that card's power state is changing
 924  * due to software, hardware, or critical temperature RFKILL */
 925 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 926                                     struct iwl_rx_mem_buffer *rxb)
 927 {
 928         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 929         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 930         unsigned long status = priv->status;
 931
 932         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 933                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 934                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 935
 936         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 937                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 938
 939         if (flags & HW_CARD_DISABLED)
 940                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 941         else
 942                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 943
 944
 945         iwl_scan_cancel(priv);
 946
 947         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 948              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 949                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 950                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 951         else
 952                 wake_up_interruptible(&priv->wait_command_queue);
 953 }
 954
 955 /**
 956  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 957  *
 958  * Setup the RX handlers for each of the reply types sent from the uCode
 959  * to the host.
 960  *
 961  * This function chains into the hardware specific files for them to setup
 962  * any hardware specific handlers as well.
 963  */
 964 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 965 {
 966         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 967         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 968         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 969         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 970         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 971         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 972             iwl_rx_pm_debug_statistics_notif;
 973         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 974
 975         /*
 976          * The same handler is used for both the REPLY to a discrete
 977          * statistics request from the host as well as for the periodic
 978          * statistics notifications (after received beacons) from the uCode.
 979          */
 980         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 981         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 982
 983         iwl_setup_spectrum_handlers(priv);
 984         iwl_setup_rx_scan_handlers(priv);
 985         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 986
 987         /* Set up hardware specific Rx handlers */
 988         iwl3945_hw_rx_handler_setup(priv);
 989 }
 990
 991 /************************** RX-FUNCTIONS ****************************/
 992 /*
 993  * Rx theory of operation
 994  *
 995  * The host allocates 32 DMA target addresses and passes the host address
 996  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 997  * 0 to 31
 998  *
 999  * Rx Queue Indexes
1000  * The host/firmware share two index registers for managing the Rx buffers.
1001  *
1002  * The READ index maps to the first position that the firmware may be writing
1003  * to -- the driver can read up to (but not including) this position and get
1004  * good data.
1005  * The READ index is managed by the firmware once the card is enabled.
1006  *
1007  * The WRITE index maps to the last position the driver has read from -- the
1008  * position preceding WRITE is the last slot the firmware can place a packet.
1009  *
1010  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1011  * WRITE = READ.
1012  *
1013  * During initialization, the host sets up the READ queue position to the first
1014  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1015  *
1016  * When the firmware places a packet in a buffer, it will advance the READ index
1017  * and fire the RX interrupt.  The driver can then query the READ index and
1018  * process as many packets as possible, moving the WRITE index forward as it
1019  * resets the Rx queue buffers with new memory.
1020  *
1021  * The management in the driver is as follows:
1022  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1023  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1024  *   to replenish the iwl->rxq->rx_free.
1025  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1026  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1027  *   'processed' and 'read' driver indexes as well)
1028  * + A received packet is processed and handed to the kernel network stack,
1029  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1030  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1031  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1032  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1033  *   were enough free buffers and RX_STALLED is set it is cleared.
1034  *
1035  *
1036  * Driver sequence:
1037  *
1038  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1039  *                            iwl3945_rx_queue_restock
1040  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1041  *                            queue, updates firmware pointers, and updates
1042  *                            the WRITE index.  If insufficient rx_free buffers
1043  *                            are available, schedules iwl3945_rx_replenish
1044  *
1045  * -- enable interrupts --
1046  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1047  *                            READ INDEX, detaching the SKB from the pool.
1048  *                            Moves the packet buffer from queue to rx_used.
1049  *                            Calls iwl3945_rx_queue_restock to refill any empty
1050  *                            slots.
1051  * ...
1052  *
1053  */
1054
1055 /**
1056  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1057  */
1058 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1059                                           dma_addr_t dma_addr)
1060 {
1061         return cpu_to_le32((u32)dma_addr);
1062 }
1063
1064 /**
1065  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1066  *
1067  * If there are slots in the RX queue that need to be restocked,
1068  * and we have free pre-allocated buffers, fill the ranks as much
1069  * as we can, pulling from rx_free.
1070  *
1071  * This moves the 'write' index forward to catch up with 'processed', and
1072  * also updates the memory address in the firmware to reference the new
1073  * target buffer.
1074  */
1075 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1076 {
1077         struct iwl_rx_queue *rxq = &priv->rxq;
1078         struct list_head *element;
1079         struct iwl_rx_mem_buffer *rxb;
1080         unsigned long flags;
1081         int write, rc;
1082
1083         spin_lock_irqsave(&rxq->lock, flags);
1084         write = rxq->write & ~0x7;
1085         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1086                 /* Get next free Rx buffer, remove from free list */
1087                 element = rxq->rx_free.next;
1088                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1089                 list_del(element);
1090
1091                 /* Point to Rx buffer via next RBD in circular buffer */
1092                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1093                 rxq->queue[rxq->write] = rxb;
1094                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1095                 rxq->free_count--;
1096         }
1097         spin_unlock_irqrestore(&rxq->lock, flags);
1098         /* If the pre-allocated buffer pool is dropping low, schedule to
1099          * refill it */
1100         if (rxq->free_count <= RX_LOW_WATERMARK)
1101                 queue_work(priv->workqueue, &priv->rx_replenish);
1102
1103
1104         /* If we've added more space for the firmware to place data, tell it.
1105          * Increment device's write pointer in multiples of 8. */
1106         if ((rxq->write_actual != (rxq->write & ~0x7))
1107             || (abs(rxq->write - rxq->read) > 7)) {
1108                 spin_lock_irqsave(&rxq->lock, flags);
1109                 rxq->need_update = 1;
1110                 spin_unlock_irqrestore(&rxq->lock, flags);
1111                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1112                 if (rc)
1113                         return rc;
1114         }
1115
1116         return 0;
1117 }
1118
1119 /**
1120  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1121  *
1122  * When moving to rx_free an SKB is allocated for the slot.
1123  *
1124  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1125  * This is called as a scheduled work item (except for during initialization)
1126  */
1127 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1128 {
1129         struct iwl_rx_queue *rxq = &priv->rxq;
1130         struct list_head *element;
1131         struct iwl_rx_mem_buffer *rxb;
1132         unsigned long flags;
1133
1134         while (1) {
1135                 spin_lock_irqsave(&rxq->lock, flags);
1136
1137                 if (list_empty(&rxq->rx_used)) {
1138                         spin_unlock_irqrestore(&rxq->lock, flags);
1139                         return;
1140                 }
1141
1142                 element = rxq->rx_used.next;
1143                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1144                 list_del(element);
1145                 spin_unlock_irqrestore(&rxq->lock, flags);
1146
1147                 /* Alloc a new receive buffer */
1148                 rxb->skb =
1149                     alloc_skb(priv->hw_params.rx_buf_size,
1150                                 priority);
1151                 if (!rxb->skb) {
1152                         if (net_ratelimit())
1153                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1154                         /* We don't reschedule replenish work here -- we will
1155                          * call the restock method and if it still needs
1156                          * more buffers it will schedule replenish */
1157                         break;
1158                 }
1159
1160                 /* If radiotap head is required, reserve some headroom here.
1161                  * The physical head count is a variable rx_stats->phy_count.
1162                  * We reserve 4 bytes here. Plus these extra bytes, the
1163                  * headroom of the physical head should be enough for the
1164                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1165                  */
1166                 skb_reserve(rxb->skb, 4);
1167
1168                 /* Get physical address of RB/SKB */
1169                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1170                                                 rxb->skb->data,
1171                                                 priv->hw_params.rx_buf_size,
1172                                                 PCI_DMA_FROMDEVICE);
1173
1174                 spin_lock_irqsave(&rxq->lock, flags);
1175                 list_add_tail(&rxb->list, &rxq->rx_free);
1176                 priv->alloc_rxb_skb++;
1177                 rxq->free_count++;
1178                 spin_unlock_irqrestore(&rxq->lock, flags);
1179         }
1180 }
1181
1182 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1183 {
1184         unsigned long flags;
1185         int i;
1186         spin_lock_irqsave(&rxq->lock, flags);
1187         INIT_LIST_HEAD(&rxq->rx_free);
1188         INIT_LIST_HEAD(&rxq->rx_used);
1189         /* Fill the rx_used queue with _all_ of the Rx buffers */
1190         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1191                 /* In the reset function, these buffers may have been allocated
1192                  * to an SKB, so we need to unmap and free potential storage */
1193                 if (rxq->pool[i].skb != NULL) {
1194                         pci_unmap_single(priv->pci_dev,
1195                                          rxq->pool[i].real_dma_addr,
1196                                          priv->hw_params.rx_buf_size,
1197                                          PCI_DMA_FROMDEVICE);
1198                         priv->alloc_rxb_skb--;
1199                         dev_kfree_skb(rxq->pool[i].skb);
1200                         rxq->pool[i].skb = NULL;
1201                 }
1202                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1203         }
1204
1205         /* Set us so that we have processed and used all buffers, but have
1206          * not restocked the Rx queue with fresh buffers */
1207         rxq->read = rxq->write = 0;
1208         rxq->free_count = 0;
1209         rxq->write_actual = 0;
1210         spin_unlock_irqrestore(&rxq->lock, flags);
1211 }
1212
1213 void iwl3945_rx_replenish(void *data)
1214 {
1215         struct iwl_priv *priv = data;
1216         unsigned long flags;
1217
1218         iwl3945_rx_allocate(priv, GFP_KERNEL);
1219
1220         spin_lock_irqsave(&priv->lock, flags);
1221         iwl3945_rx_queue_restock(priv);
1222         spin_unlock_irqrestore(&priv->lock, flags);
1223 }
1224
1225 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1226 {
1227         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1228
1229         iwl3945_rx_queue_restock(priv);
1230 }
1231
1232
1233 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1234  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1235  * This free routine walks the list of POOL entries and if SKB is set to
1236  * non NULL it is unmapped and freed
1237  */
1238 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1239 {
1240         int i;
1241         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1242                 if (rxq->pool[i].skb != NULL) {
1243                         pci_unmap_single(priv->pci_dev,
1244                                          rxq->pool[i].real_dma_addr,
1245                                          priv->hw_params.rx_buf_size,
1246                                          PCI_DMA_FROMDEVICE);
1247                         dev_kfree_skb(rxq->pool[i].skb);
1248                 }
1249         }
1250
1251         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1252                             rxq->dma_addr);
1253         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1254                             rxq->rb_stts, rxq->rb_stts_dma);
1255         rxq->bd = NULL;
1256         rxq->rb_stts  = NULL;
1257 }
1258
1259
1260 /* Convert linear signal-to-noise ratio into dB */
1261 static u8 ratio2dB[100] = {
1262 /*       0   1   2   3   4   5   6   7   8   9 */
1263          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1264         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1265         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1266         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1267         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1268         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1269         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1270         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1271         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1272         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1273 };
1274
1275 /* Calculates a relative dB value from a ratio of linear
1276  *   (i.e. not dB) signal levels.
1277  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1278 int iwl3945_calc_db_from_ratio(int sig_ratio)
1279 {
1280         /* 1000:1 or higher just report as 60 dB */
1281         if (sig_ratio >= 1000)
1282                 return 60;
1283
1284         /* 100:1 or higher, divide by 10 and use table,
1285          *   add 20 dB to make up for divide by 10 */
1286         if (sig_ratio >= 100)
1287                 return 20 + (int)ratio2dB[sig_ratio/10];
1288
1289         /* We shouldn't see this */
1290         if (sig_ratio < 1)
1291                 return 0;
1292
1293         /* Use table for ratios 1:1 - 99:1 */
1294         return (int)ratio2dB[sig_ratio];
1295 }
1296
1297 #define PERFECT_RSSI (-20) /* dBm */
1298 #define WORST_RSSI (-95)   /* dBm */
1299 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1300
1301 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1302  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1303  *   about formulas used below. */
1304 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1305 {
1306         int sig_qual;
1307         int degradation = PERFECT_RSSI - rssi_dbm;
1308
1309         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1310          * as indicator; formula is (signal dbm - noise dbm).
1311          * SNR at or above 40 is a great signal (100%).
1312          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1313          * Weakest usable signal is usually 10 - 15 dB SNR. */
1314         if (noise_dbm) {
1315                 if (rssi_dbm - noise_dbm >= 40)
1316                         return 100;
1317                 else if (rssi_dbm < noise_dbm)
1318                         return 0;
1319                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1320
1321         /* Else use just the signal level.
1322          * This formula is a least squares fit of data points collected and
1323          *   compared with a reference system that had a percentage (%) display
1324          *   for signal quality. */
1325         } else
1326                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1327                             (15 * RSSI_RANGE + 62 * degradation)) /
1328                            (RSSI_RANGE * RSSI_RANGE);
1329
1330         if (sig_qual > 100)
1331                 sig_qual = 100;
1332         else if (sig_qual < 1)
1333                 sig_qual = 0;
1334
1335         return sig_qual;
1336 }
1337
1338 /**
1339  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1340  *
1341  * Uses the priv->rx_handlers callback function array to invoke
1342  * the appropriate handlers, including command responses,
1343  * frame-received notifications, and other notifications.
1344  */
1345 static void iwl3945_rx_handle(struct iwl_priv *priv)
1346 {
1347         struct iwl_rx_mem_buffer *rxb;
1348         struct iwl_rx_packet *pkt;
1349         struct iwl_rx_queue *rxq = &priv->rxq;
1350         u32 r, i;
1351         int reclaim;
1352         unsigned long flags;
1353         u8 fill_rx = 0;
1354         u32 count = 8;
1355         int total_empty = 0;
1356
1357         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1358          * buffer that the driver may process (last buffer filled by ucode). */
1359         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1360         i = rxq->read;
1361
1362         /* calculate total frames need to be restock after handling RX */
1363         total_empty = r - priv->rxq.write_actual;
1364         if (total_empty < 0)
1365                 total_empty += RX_QUEUE_SIZE;
1366
1367         if (total_empty > (RX_QUEUE_SIZE / 2))
1368                 fill_rx = 1;
1369         /* Rx interrupt, but nothing sent from uCode */
1370         if (i == r)
1371                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1372
1373         while (i != r) {
1374                 rxb = rxq->queue[i];
1375
1376                 /* If an RXB doesn't have a Rx queue slot associated with it,
1377                  * then a bug has been introduced in the queue refilling
1378                  * routines -- catch it here */
1379                 BUG_ON(rxb == NULL);
1380
1381                 rxq->queue[i] = NULL;
1382
1383                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1384                                 priv->hw_params.rx_buf_size,
1385                                 PCI_DMA_FROMDEVICE);
1386                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1387
1388                 /* Reclaim a command buffer only if this packet is a response
1389                  *   to a (driver-originated) command.
1390                  * If the packet (e.g. Rx frame) originated from uCode,
1391                  *   there is no command buffer to reclaim.
1392                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1393                  *   but apparently a few don't get set; catch them here. */
1394                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1395                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1396                         (pkt->hdr.cmd != REPLY_TX);
1397
1398                 /* Based on type of command response or notification,
1399                  *   handle those that need handling via function in
1400                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1401                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1402                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1403                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1404                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1405                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1406                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1407                 } else {
1408                         /* No handling needed */
1409                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1410                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1411                                 r, i, get_cmd_string(pkt->hdr.cmd),
1412                                 pkt->hdr.cmd);
1413                 }
1414
1415                 if (reclaim) {
1416                         /* Invoke any callbacks, transfer the skb to caller, and
1417                          * fire off the (possibly) blocking iwl_send_cmd()
1418                          * as we reclaim the driver command queue */
1419                         if (rxb && rxb->skb)
1420                                 iwl_tx_cmd_complete(priv, rxb);
1421                         else
1422                                 IWL_WARN(priv, "Claim null rxb?\n");
1423                 }
1424
1425                 /* For now we just don't re-use anything.  We can tweak this
1426                  * later to try and re-use notification packets and SKBs that
1427                  * fail to Rx correctly */
1428                 if (rxb->skb != NULL) {
1429                         priv->alloc_rxb_skb--;
1430                         dev_kfree_skb_any(rxb->skb);
1431                         rxb->skb = NULL;
1432                 }
1433
1434                 spin_lock_irqsave(&rxq->lock, flags);
1435                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1436                 spin_unlock_irqrestore(&rxq->lock, flags);
1437                 i = (i + 1) & RX_QUEUE_MASK;
1438                 /* If there are a lot of unused frames,
1439                  * restock the Rx queue so ucode won't assert. */
1440                 if (fill_rx) {
1441                         count++;
1442                         if (count >= 8) {
1443                                 priv->rxq.read = i;
1444                                 iwl3945_rx_replenish_now(priv);
1445                                 count = 0;
1446                         }
1447                 }
1448         }
1449
1450         /* Backtrack one entry */
1451         priv->rxq.read = i;
1452         if (fill_rx)
1453                 iwl3945_rx_replenish_now(priv);
1454         else
1455                 iwl3945_rx_queue_restock(priv);
1456 }
1457
1458 /* call this function to flush any scheduled tasklet */
1459 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1460 {
1461         /* wait to make sure we flush pending tasklet*/
1462         synchronize_irq(priv->pci_dev->irq);
1463         tasklet_kill(&priv->irq_tasklet);
1464 }
1465
1466 static const char *desc_lookup(int i)
1467 {
1468         switch (i) {
1469         case 1:
1470                 return "FAIL";
1471         case 2:
1472                 return "BAD_PARAM";
1473         case 3:
1474                 return "BAD_CHECKSUM";
1475         case 4:
1476                 return "NMI_INTERRUPT";
1477         case 5:
1478                 return "SYSASSERT";
1479         case 6:
1480                 return "FATAL_ERROR";
1481         }
1482
1483         return "UNKNOWN";
1484 }
1485
1486 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1487 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1488
1489 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1490 {
1491         u32 i;
1492         u32 desc, time, count, base, data1;
1493         u32 blink1, blink2, ilink1, ilink2;
1494
1495         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1496
1497         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1498                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1499                 return;
1500         }
1501
1502
1503         count = iwl_read_targ_mem(priv, base);
1504
1505         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1506                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1507                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1508                         priv->status, count);
1509         }
1510
1511         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1512                   "ilink1  nmiPC   Line\n");
1513         for (i = ERROR_START_OFFSET;
1514              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1515              i += ERROR_ELEM_SIZE) {
1516                 desc = iwl_read_targ_mem(priv, base + i);
1517                 time =
1518                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1519                 blink1 =
1520                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1521                 blink2 =
1522                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1523                 ilink1 =
1524                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1525                 ilink2 =
1526                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1527                 data1 =
1528                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1529
1530                 IWL_ERR(priv,
1531                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1532                         desc_lookup(desc), desc, time, blink1, blink2,
1533                         ilink1, ilink2, data1);
1534         }
1535
1536 }
1537
1538 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1539
1540 /**
1541  * iwl3945_print_event_log - Dump error event log to syslog
1542  *
1543  */
1544 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1545                                 u32 num_events, u32 mode)
1546 {
1547         u32 i;
1548         u32 base;       /* SRAM byte address of event log header */
1549         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1550         u32 ptr;        /* SRAM byte address of log data */
1551         u32 ev, time, data; /* event log data */
1552
1553         if (num_events == 0)
1554                 return;
1555
1556         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1557
1558         if (mode == 0)
1559                 event_size = 2 * sizeof(u32);
1560         else
1561                 event_size = 3 * sizeof(u32);
1562
1563         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1564
1565         /* "time" is actually "data" for mode 0 (no timestamp).
1566          * place event id # at far right for easier visual parsing. */
1567         for (i = 0; i < num_events; i++) {
1568                 ev = iwl_read_targ_mem(priv, ptr);
1569                 ptr += sizeof(u32);
1570                 time = iwl_read_targ_mem(priv, ptr);
1571                 ptr += sizeof(u32);
1572                 if (mode == 0) {
1573                         /* data, ev */
1574                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1575                 } else {
1576                         data = iwl_read_targ_mem(priv, ptr);
1577                         ptr += sizeof(u32);
1578                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1579                 }
1580         }
1581 }
1582
1583 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1584 {
1585         u32 base;       /* SRAM byte address of event log header */
1586         u32 capacity;   /* event log capacity in # entries */
1587         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1588         u32 num_wraps;  /* # times uCode wrapped to top of log */
1589         u32 next_entry; /* index of next entry to be written by uCode */
1590         u32 size;       /* # entries that we'll print */
1591
1592         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1593         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1594                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1595                 return;
1596         }
1597
1598         /* event log header */
1599         capacity = iwl_read_targ_mem(priv, base);
1600         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1601         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1602         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1603
1604         size = num_wraps ? capacity : next_entry;
1605
1606         /* bail out if nothing in log */
1607         if (size == 0) {
1608                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1609                 return;
1610         }
1611
1612         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1613                   size, num_wraps);
1614
1615         /* if uCode has wrapped back to top of log, start at the oldest entry,
1616          * i.e the next one that uCode would fill. */
1617         if (num_wraps)
1618                 iwl3945_print_event_log(priv, next_entry,
1619                                     capacity - next_entry, mode);
1620
1621         /* (then/else) start at top of log */
1622         iwl3945_print_event_log(priv, 0, next_entry, mode);
1623
1624 }
1625
1626 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1627 {
1628         u32 inta, handled = 0;
1629         u32 inta_fh;
1630         unsigned long flags;
1631 #ifdef CONFIG_IWLWIFI_DEBUG
1632         u32 inta_mask;
1633 #endif
1634
1635         spin_lock_irqsave(&priv->lock, flags);
1636
1637         /* Ack/clear/reset pending uCode interrupts.
1638          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1639          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1640         inta = iwl_read32(priv, CSR_INT);
1641         iwl_write32(priv, CSR_INT, inta);
1642
1643         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1644          * Any new interrupts that happen after this, either while we're
1645          * in this tasklet, or later, will show up in next ISR/tasklet. */
1646         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1647         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1648
1649 #ifdef CONFIG_IWLWIFI_DEBUG
1650         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1651                 /* just for debug */
1652                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1653                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1654                               inta, inta_mask, inta_fh);
1655         }
1656 #endif
1657
1658         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1659          * atomic, make sure that inta covers all the interrupts that
1660          * we've discovered, even if FH interrupt came in just after
1661          * reading CSR_INT. */
1662         if (inta_fh & CSR39_FH_INT_RX_MASK)
1663                 inta |= CSR_INT_BIT_FH_RX;
1664         if (inta_fh & CSR39_FH_INT_TX_MASK)
1665                 inta |= CSR_INT_BIT_FH_TX;
1666
1667         /* Now service all interrupt bits discovered above. */
1668         if (inta & CSR_INT_BIT_HW_ERR) {
1669                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1670
1671                 /* Tell the device to stop sending interrupts */
1672                 iwl_disable_interrupts(priv);
1673
1674                 priv->isr_stats.hw++;
1675                 iwl_irq_handle_error(priv);
1676
1677                 handled |= CSR_INT_BIT_HW_ERR;
1678
1679                 spin_unlock_irqrestore(&priv->lock, flags);
1680
1681                 return;
1682         }
1683
1684 #ifdef CONFIG_IWLWIFI_DEBUG
1685         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1686                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1687                 if (inta & CSR_INT_BIT_SCD) {
1688                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1689                                       "the frame/frames.\n");
1690                         priv->isr_stats.sch++;
1691                 }
1692
1693                 /* Alive notification via Rx interrupt will do the real work */
1694                 if (inta & CSR_INT_BIT_ALIVE) {
1695                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1696                         priv->isr_stats.alive++;
1697                 }
1698         }
1699 #endif
1700         /* Safely ignore these bits for debug checks below */
1701         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1702
1703         /* Error detected by uCode */
1704         if (inta & CSR_INT_BIT_SW_ERR) {
1705                 IWL_ERR(priv, "Microcode SW error detected. "
1706                         "Restarting 0x%X.\n", inta);
1707                 priv->isr_stats.sw++;
1708                 priv->isr_stats.sw_err = inta;
1709                 iwl_irq_handle_error(priv);
1710                 handled |= CSR_INT_BIT_SW_ERR;
1711         }
1712
1713         /* uCode wakes up after power-down sleep */
1714         if (inta & CSR_INT_BIT_WAKEUP) {
1715                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1716                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1717                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1718                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1719                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1720                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1721                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1722                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1723
1724                 priv->isr_stats.wakeup++;
1725                 handled |= CSR_INT_BIT_WAKEUP;
1726         }
1727
1728         /* All uCode command responses, including Tx command responses,
1729          * Rx "responses" (frame-received notification), and other
1730          * notifications from uCode come through here*/
1731         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1732                 iwl3945_rx_handle(priv);
1733                 priv->isr_stats.rx++;
1734                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1735         }
1736
1737         if (inta & CSR_INT_BIT_FH_TX) {
1738                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1739                 priv->isr_stats.tx++;
1740
1741                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1742                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1743                                         (FH39_SRVC_CHNL), 0x0);
1744                 handled |= CSR_INT_BIT_FH_TX;
1745         }
1746
1747         if (inta & ~handled) {
1748                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1749                 priv->isr_stats.unhandled++;
1750         }
1751
1752         if (inta & ~priv->inta_mask) {
1753                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1754                          inta & ~priv->inta_mask);
1755                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1756         }
1757
1758         /* Re-enable all interrupts */
1759         /* only Re-enable if disabled by irq */
1760         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1761                 iwl_enable_interrupts(priv);
1762
1763 #ifdef CONFIG_IWLWIFI_DEBUG
1764         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1765                 inta = iwl_read32(priv, CSR_INT);
1766                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1767                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1768                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1769                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1770         }
1771 #endif
1772         spin_unlock_irqrestore(&priv->lock, flags);
1773 }
1774
1775 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1776                                          enum ieee80211_band band,
1777                                      u8 is_active, u8 n_probes,
1778                                      struct iwl3945_scan_channel *scan_ch)
1779 {
1780         struct ieee80211_channel *chan;
1781         const struct ieee80211_supported_band *sband;
1782         const struct iwl_channel_info *ch_info;
1783         u16 passive_dwell = 0;
1784         u16 active_dwell = 0;
1785         int added, i;
1786
1787         sband = iwl_get_hw_mode(priv, band);
1788         if (!sband)
1789                 return 0;
1790
1791         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1792         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1793
1794         if (passive_dwell <= active_dwell)
1795                 passive_dwell = active_dwell + 1;
1796
1797         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1798                 chan = priv->scan_request->channels[i];
1799
1800                 if (chan->band != band)
1801                         continue;
1802
1803                 scan_ch->channel = chan->hw_value;
1804
1805                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1806                 if (!is_channel_valid(ch_info)) {
1807                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1808                                        scan_ch->channel);
1809                         continue;
1810                 }
1811
1812                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1813                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1814                 /* If passive , set up for auto-switch
1815                  *  and use long active_dwell time.
1816                  */
1817                 if (!is_active || is_channel_passive(ch_info) ||
1818                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1819                         scan_ch->type = 0;      /* passive */
1820                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1821                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1822                 } else {
1823                         scan_ch->type = 1;      /* active */
1824                 }
1825
1826                 /* Set direct probe bits. These may be used both for active
1827                  * scan channels (probes gets sent right away),
1828                  * or for passive channels (probes get se sent only after
1829                  * hearing clear Rx packet).*/
1830                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1831                         if (n_probes)
1832                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1833                 } else {
1834                         /* uCode v1 does not allow setting direct probe bits on
1835                          * passive channel. */
1836                         if ((scan_ch->type & 1) && n_probes)
1837                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1838                 }
1839
1840                 /* Set txpower levels to defaults */
1841                 scan_ch->tpc.dsp_atten = 110;
1842                 /* scan_pwr_info->tpc.dsp_atten; */
1843
1844                 /*scan_pwr_info->tpc.tx_gain; */
1845                 if (band == IEEE80211_BAND_5GHZ)
1846                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1847                 else {
1848                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1849                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1850                          * power level:
1851                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1852                          */
1853                 }
1854
1855                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1856                                scan_ch->channel,
1857                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1858                                (scan_ch->type & 1) ?
1859                                active_dwell : passive_dwell);
1860
1861                 scan_ch++;
1862                 added++;
1863         }
1864
1865         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1866         return added;
1867 }
1868
1869 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1870                               struct ieee80211_rate *rates)
1871 {
1872         int i;
1873
1874         for (i = 0; i < IWL_RATE_COUNT; i++) {
1875                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1876                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1877                 rates[i].hw_value_short = i;
1878                 rates[i].flags = 0;
1879                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1880                         /*
1881                          * If CCK != 1M then set short preamble rate flag.
1882                          */
1883                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1884                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1885                 }
1886         }
1887 }
1888
1889 /******************************************************************************
1890  *
1891  * uCode download functions
1892  *
1893  ******************************************************************************/
1894
1895 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1896 {
1897         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1898         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1899         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1900         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1901         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1902         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1903 }
1904
1905 /**
1906  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1907  *     looking at all data.
1908  */
1909 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1910 {
1911         u32 val;
1912         u32 save_len = len;
1913         int rc = 0;
1914         u32 errcnt;
1915
1916         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1917
1918         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1919                                IWL39_RTC_INST_LOWER_BOUND);
1920
1921         errcnt = 0;
1922         for (; len > 0; len -= sizeof(u32), image++) {
1923                 /* read data comes through single port, auto-incr addr */
1924                 /* NOTE: Use the debugless read so we don't flood kernel log
1925                  * if IWL_DL_IO is set */
1926                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1927                 if (val != le32_to_cpu(*image)) {
1928                         IWL_ERR(priv, "uCode INST section is invalid at "
1929                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1930                                   save_len - len, val, le32_to_cpu(*image));
1931                         rc = -EIO;
1932                         errcnt++;
1933                         if (errcnt >= 20)
1934                                 break;
1935                 }
1936         }
1937
1938
1939         if (!errcnt)
1940                 IWL_DEBUG_INFO(priv,
1941                         "ucode image in INSTRUCTION memory is good\n");
1942
1943         return rc;
1944 }
1945
1946
1947 /**
1948  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1949  *   using sample data 100 bytes apart.  If these sample points are good,
1950  *   it's a pretty good bet that everything between them is good, too.
1951  */
1952 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1953 {
1954         u32 val;
1955         int rc = 0;
1956         u32 errcnt = 0;
1957         u32 i;
1958
1959         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1960
1961         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1962                 /* read data comes through single port, auto-incr addr */
1963                 /* NOTE: Use the debugless read so we don't flood kernel log
1964                  * if IWL_DL_IO is set */
1965                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1966                         i + IWL39_RTC_INST_LOWER_BOUND);
1967                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1968                 if (val != le32_to_cpu(*image)) {
1969 #if 0 /* Enable this if you want to see details */
1970                         IWL_ERR(priv, "uCode INST section is invalid at "
1971                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1972                                   i, val, *image);
1973 #endif
1974                         rc = -EIO;
1975                         errcnt++;
1976                         if (errcnt >= 3)
1977                                 break;
1978                 }
1979         }
1980
1981         return rc;
1982 }
1983
1984
1985 /**
1986  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
1987  *    and verify its contents
1988  */
1989 static int iwl3945_verify_ucode(struct iwl_priv *priv)
1990 {
1991         __le32 *image;
1992         u32 len;
1993         int rc = 0;
1994
1995         /* Try bootstrap */
1996         image = (__le32 *)priv->ucode_boot.v_addr;
1997         len = priv->ucode_boot.len;
1998         rc = iwl3945_verify_inst_sparse(priv, image, len);
1999         if (rc == 0) {
2000                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2001                 return 0;
2002         }
2003
2004         /* Try initialize */
2005         image = (__le32 *)priv->ucode_init.v_addr;
2006         len = priv->ucode_init.len;
2007         rc = iwl3945_verify_inst_sparse(priv, image, len);
2008         if (rc == 0) {
2009                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2010                 return 0;
2011         }
2012
2013         /* Try runtime/protocol */
2014         image = (__le32 *)priv->ucode_code.v_addr;
2015         len = priv->ucode_code.len;
2016         rc = iwl3945_verify_inst_sparse(priv, image, len);
2017         if (rc == 0) {
2018                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2019                 return 0;
2020         }
2021
2022         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2023
2024         /* Since nothing seems to match, show first several data entries in
2025          * instruction SRAM, so maybe visual inspection will give a clue.
2026          * Selection of bootstrap image (vs. other images) is arbitrary. */
2027         image = (__le32 *)priv->ucode_boot.v_addr;
2028         len = priv->ucode_boot.len;
2029         rc = iwl3945_verify_inst_full(priv, image, len);
2030
2031         return rc;
2032 }
2033
2034 static void iwl3945_nic_start(struct iwl_priv *priv)
2035 {
2036         /* Remove all resets to allow NIC to operate */
2037         iwl_write32(priv, CSR_RESET, 0);
2038 }
2039
2040 /**
2041  * iwl3945_read_ucode - Read uCode images from disk file.
2042  *
2043  * Copy into buffers for card to fetch via bus-mastering
2044  */
2045 static int iwl3945_read_ucode(struct iwl_priv *priv)
2046 {
2047         const struct iwl_ucode_header *ucode;
2048         int ret = -EINVAL, index;
2049         const struct firmware *ucode_raw;
2050         /* firmware file name contains uCode/driver compatibility version */
2051         const char *name_pre = priv->cfg->fw_name_pre;
2052         const unsigned int api_max = priv->cfg->ucode_api_max;
2053         const unsigned int api_min = priv->cfg->ucode_api_min;
2054         char buf[25];
2055         u8 *src;
2056         size_t len;
2057         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2058
2059         /* Ask kernel firmware_class module to get the boot firmware off disk.
2060          * request_firmware() is synchronous, file is in memory on return. */
2061         for (index = api_max; index >= api_min; index--) {
2062                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2063                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2064                 if (ret < 0) {
2065                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2066                                   buf, ret);
2067                         if (ret == -ENOENT)
2068                                 continue;
2069                         else
2070                                 goto error;
2071                 } else {
2072                         if (index < api_max)
2073                                 IWL_ERR(priv, "Loaded firmware %s, "
2074                                         "which is deprecated. "
2075                                         " Please use API v%u instead.\n",
2076                                           buf, api_max);
2077                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2078                                        "(%zd bytes) from disk\n",
2079                                        buf, ucode_raw->size);
2080                         break;
2081                 }
2082         }
2083
2084         if (ret < 0)
2085                 goto error;
2086
2087         /* Make sure that we got at least our header! */
2088         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2089                 IWL_ERR(priv, "File size way too small!\n");
2090                 ret = -EINVAL;
2091                 goto err_release;
2092         }
2093
2094         /* Data from ucode file:  header followed by uCode images */
2095         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2096
2097         priv->ucode_ver = le32_to_cpu(ucode->ver);
2098         api_ver = IWL_UCODE_API(priv->ucode_ver);
2099         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2100         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2101         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2102         init_data_size =
2103                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2104         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2105         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2106
2107         /* api_ver should match the api version forming part of the
2108          * firmware filename ... but we don't check for that and only rely
2109          * on the API version read from firmware header from here on forward */
2110
2111         if (api_ver < api_min || api_ver > api_max) {
2112                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2113                           "Driver supports v%u, firmware is v%u.\n",
2114                           api_max, api_ver);
2115                 priv->ucode_ver = 0;
2116                 ret = -EINVAL;
2117                 goto err_release;
2118         }
2119         if (api_ver != api_max)
2120                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2121                           "got %u. New firmware can be obtained "
2122                           "from http://www.intellinuxwireless.org.\n",
2123                           api_max, api_ver);
2124
2125         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2126                 IWL_UCODE_MAJOR(priv->ucode_ver),
2127                 IWL_UCODE_MINOR(priv->ucode_ver),
2128                 IWL_UCODE_API(priv->ucode_ver),
2129                 IWL_UCODE_SERIAL(priv->ucode_ver));
2130
2131         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2132                        priv->ucode_ver);
2133         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2134                        inst_size);
2135         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2136                        data_size);
2137         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2138                        init_size);
2139         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2140                        init_data_size);
2141         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2142                        boot_size);
2143
2144
2145         /* Verify size of file vs. image size info in file's header */
2146         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2147                 inst_size + data_size + init_size +
2148                 init_data_size + boot_size) {
2149
2150                 IWL_DEBUG_INFO(priv,
2151                         "uCode file size %zd does not match expected size\n",
2152                         ucode_raw->size);
2153                 ret = -EINVAL;
2154                 goto err_release;
2155         }
2156
2157         /* Verify that uCode images will fit in card's SRAM */
2158         if (inst_size > IWL39_MAX_INST_SIZE) {
2159                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2160                                inst_size);
2161                 ret = -EINVAL;
2162                 goto err_release;
2163         }
2164
2165         if (data_size > IWL39_MAX_DATA_SIZE) {
2166                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2167                                data_size);
2168                 ret = -EINVAL;
2169                 goto err_release;
2170         }
2171         if (init_size > IWL39_MAX_INST_SIZE) {
2172                 IWL_DEBUG_INFO(priv,
2173                                 "uCode init instr len %d too large to fit in\n",
2174                                 init_size);
2175                 ret = -EINVAL;
2176                 goto err_release;
2177         }
2178         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2179                 IWL_DEBUG_INFO(priv,
2180                                 "uCode init data len %d too large to fit in\n",
2181                                 init_data_size);
2182                 ret = -EINVAL;
2183                 goto err_release;
2184         }
2185         if (boot_size > IWL39_MAX_BSM_SIZE) {
2186                 IWL_DEBUG_INFO(priv,
2187                                 "uCode boot instr len %d too large to fit in\n",
2188                                 boot_size);
2189                 ret = -EINVAL;
2190                 goto err_release;
2191         }
2192
2193         /* Allocate ucode buffers for card's bus-master loading ... */
2194
2195         /* Runtime instructions and 2 copies of data:
2196          * 1) unmodified from disk
2197          * 2) backup cache for save/restore during power-downs */
2198         priv->ucode_code.len = inst_size;
2199         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2200
2201         priv->ucode_data.len = data_size;
2202         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2203
2204         priv->ucode_data_backup.len = data_size;
2205         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2206
2207         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2208             !priv->ucode_data_backup.v_addr)
2209                 goto err_pci_alloc;
2210
2211         /* Initialization instructions and data */
2212         if (init_size && init_data_size) {
2213                 priv->ucode_init.len = init_size;
2214                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2215
2216                 priv->ucode_init_data.len = init_data_size;
2217                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2218
2219                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2220                         goto err_pci_alloc;
2221         }
2222
2223         /* Bootstrap (instructions only, no data) */
2224         if (boot_size) {
2225                 priv->ucode_boot.len = boot_size;
2226                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2227
2228                 if (!priv->ucode_boot.v_addr)
2229                         goto err_pci_alloc;
2230         }
2231
2232         /* Copy images into buffers for card's bus-master reads ... */
2233
2234         /* Runtime instructions (first block of data in file) */
2235         len = inst_size;
2236         IWL_DEBUG_INFO(priv,
2237                 "Copying (but not loading) uCode instr len %zd\n", len);
2238         memcpy(priv->ucode_code.v_addr, src, len);
2239         src += len;
2240
2241         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2242                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2243
2244         /* Runtime data (2nd block)
2245          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2246         len = data_size;
2247         IWL_DEBUG_INFO(priv,
2248                 "Copying (but not loading) uCode data len %zd\n", len);
2249         memcpy(priv->ucode_data.v_addr, src, len);
2250         memcpy(priv->ucode_data_backup.v_addr, src, len);
2251         src += len;
2252
2253         /* Initialization instructions (3rd block) */
2254         if (init_size) {
2255                 len = init_size;
2256                 IWL_DEBUG_INFO(priv,
2257                         "Copying (but not loading) init instr len %zd\n", len);
2258                 memcpy(priv->ucode_init.v_addr, src, len);
2259                 src += len;
2260         }
2261
2262         /* Initialization data (4th block) */
2263         if (init_data_size) {
2264                 len = init_data_size;
2265                 IWL_DEBUG_INFO(priv,
2266                         "Copying (but not loading) init data len %zd\n", len);
2267                 memcpy(priv->ucode_init_data.v_addr, src, len);
2268                 src += len;
2269         }
2270
2271         /* Bootstrap instructions (5th block) */
2272         len = boot_size;
2273         IWL_DEBUG_INFO(priv,
2274                 "Copying (but not loading) boot instr len %zd\n", len);
2275         memcpy(priv->ucode_boot.v_addr, src, len);
2276
2277         /* We have our copies now, allow OS release its copies */
2278         release_firmware(ucode_raw);
2279         return 0;
2280
2281  err_pci_alloc:
2282         IWL_ERR(priv, "failed to allocate pci memory\n");
2283         ret = -ENOMEM;
2284         iwl3945_dealloc_ucode_pci(priv);
2285
2286  err_release:
2287         release_firmware(ucode_raw);
2288
2289  error:
2290         return ret;
2291 }
2292
2293
2294 /**
2295  * iwl3945_set_ucode_ptrs - Set uCode address location
2296  *
2297  * Tell initialization uCode where to find runtime uCode.
2298  *
2299  * BSM registers initially contain pointers to initialization uCode.
2300  * We need to replace them to load runtime uCode inst and data,
2301  * and to save runtime data when powering down.
2302  */
2303 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2304 {
2305         dma_addr_t pinst;
2306         dma_addr_t pdata;
2307
2308         /* bits 31:0 for 3945 */
2309         pinst = priv->ucode_code.p_addr;
2310         pdata = priv->ucode_data_backup.p_addr;
2311
2312         /* Tell bootstrap uCode where to find image to load */
2313         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2314         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2315         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2316                                  priv->ucode_data.len);
2317
2318         /* Inst byte count must be last to set up, bit 31 signals uCode
2319          *   that all new ptr/size info is in place */
2320         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2321                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2322
2323         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2324
2325         return 0;
2326 }
2327
2328 /**
2329  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2330  *
2331  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2332  *
2333  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2334  */
2335 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2336 {
2337         /* Check alive response for "valid" sign from uCode */
2338         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2339                 /* We had an error bringing up the hardware, so take it
2340                  * all the way back down so we can try again */
2341                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2342                 goto restart;
2343         }
2344
2345         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2346          * This is a paranoid check, because we would not have gotten the
2347          * "initialize" alive if code weren't properly loaded.  */
2348         if (iwl3945_verify_ucode(priv)) {
2349                 /* Runtime instruction load was bad;
2350                  * take it all the way back down so we can try again */
2351                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2352                 goto restart;
2353         }
2354
2355         /* Send pointers to protocol/runtime uCode image ... init code will
2356          * load and launch runtime uCode, which will send us another "Alive"
2357          * notification. */
2358         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2359         if (iwl3945_set_ucode_ptrs(priv)) {
2360                 /* Runtime instruction load won't happen;
2361                  * take it all the way back down so we can try again */
2362                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2363                 goto restart;
2364         }
2365         return;
2366
2367  restart:
2368         queue_work(priv->workqueue, &priv->restart);
2369 }
2370
2371 /**
2372  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2373  *                   from protocol/runtime uCode (initialization uCode's
2374  *                   Alive gets handled by iwl3945_init_alive_start()).
2375  */
2376 static void iwl3945_alive_start(struct iwl_priv *priv)
2377 {
2378         int thermal_spin = 0;
2379         u32 rfkill;
2380
2381         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2382
2383         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2384                 /* We had an error bringing up the hardware, so take it
2385                  * all the way back down so we can try again */
2386                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2387                 goto restart;
2388         }
2389
2390         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2391          * This is a paranoid check, because we would not have gotten the
2392          * "runtime" alive if code weren't properly loaded.  */
2393         if (iwl3945_verify_ucode(priv)) {
2394                 /* Runtime instruction load was bad;
2395                  * take it all the way back down so we can try again */
2396                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2397                 goto restart;
2398         }
2399
2400         iwl_clear_stations_table(priv);
2401
2402         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2403         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2404
2405         if (rfkill & 0x1) {
2406                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2407                 /* if RFKILL is not on, then wait for thermal
2408                  * sensor in adapter to kick in */
2409                 while (iwl3945_hw_get_temperature(priv) == 0) {
2410                         thermal_spin++;
2411                         udelay(10);
2412                 }
2413
2414                 if (thermal_spin)
2415                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2416                                        thermal_spin * 10);
2417         } else
2418                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2419
2420         /* After the ALIVE response, we can send commands to 3945 uCode */
2421         set_bit(STATUS_ALIVE, &priv->status);
2422
2423         if (iwl_is_rfkill(priv))
2424                 return;
2425
2426         ieee80211_wake_queues(priv->hw);
2427
2428         priv->active_rate = priv->rates_mask;
2429         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2430
2431         iwl_power_update_mode(priv, false);
2432
2433         if (iwl_is_associated(priv)) {
2434                 struct iwl3945_rxon_cmd *active_rxon =
2435                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2436
2437                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2438                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2439         } else {
2440                 /* Initialize our rx_config data */
2441                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2442         }
2443
2444         /* Configure Bluetooth device coexistence support */
2445         iwl_send_bt_config(priv);
2446
2447         /* Configure the adapter for unassociated operation */
2448         iwlcore_commit_rxon(priv);
2449
2450         iwl3945_reg_txpower_periodic(priv);
2451
2452         iwl3945_led_register(priv);
2453
2454         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2455         set_bit(STATUS_READY, &priv->status);
2456         wake_up_interruptible(&priv->wait_command_queue);
2457
2458         /* reassociate for ADHOC mode */
2459         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2460                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2461                                                                 priv->vif);
2462                 if (beacon)
2463                         iwl_mac_beacon_update(priv->hw, beacon);
2464         }
2465
2466         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2467                 iwl_set_mode(priv, priv->iw_mode);
2468
2469         return;
2470
2471  restart:
2472         queue_work(priv->workqueue, &priv->restart);
2473 }
2474
2475 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2476
2477 static void __iwl3945_down(struct iwl_priv *priv)
2478 {
2479         unsigned long flags;
2480         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2481         struct ieee80211_conf *conf = NULL;
2482
2483         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2484
2485         conf = ieee80211_get_hw_conf(priv->hw);
2486
2487         if (!exit_pending)
2488                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2489
2490         iwl3945_led_unregister(priv);
2491         iwl_clear_stations_table(priv);
2492
2493         /* Unblock any waiting calls */
2494         wake_up_interruptible_all(&priv->wait_command_queue);
2495
2496         /* Wipe out the EXIT_PENDING status bit if we are not actually
2497          * exiting the module */
2498         if (!exit_pending)
2499                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2500
2501         /* stop and reset the on-board processor */
2502         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2503
2504         /* tell the device to stop sending interrupts */
2505         spin_lock_irqsave(&priv->lock, flags);
2506         iwl_disable_interrupts(priv);
2507         spin_unlock_irqrestore(&priv->lock, flags);
2508         iwl_synchronize_irq(priv);
2509
2510         if (priv->mac80211_registered)
2511                 ieee80211_stop_queues(priv->hw);
2512
2513         /* If we have not previously called iwl3945_init() then
2514          * clear all bits but the RF Kill bits and return */
2515         if (!iwl_is_init(priv)) {
2516                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2517                                         STATUS_RF_KILL_HW |
2518                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2519                                         STATUS_GEO_CONFIGURED |
2520                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2521                                         STATUS_EXIT_PENDING;
2522                 goto exit;
2523         }
2524
2525         /* ...otherwise clear out all the status bits but the RF Kill
2526          * bit and continue taking the NIC down. */
2527         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2528                                 STATUS_RF_KILL_HW |
2529                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2530                                 STATUS_GEO_CONFIGURED |
2531                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2532                                 STATUS_FW_ERROR |
2533                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2534                                 STATUS_EXIT_PENDING;
2535
2536         priv->cfg->ops->lib->apm_ops.reset(priv);
2537         spin_lock_irqsave(&priv->lock, flags);
2538         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2539         spin_unlock_irqrestore(&priv->lock, flags);
2540
2541         iwl3945_hw_txq_ctx_stop(priv);
2542         iwl3945_hw_rxq_stop(priv);
2543
2544         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2545                                 APMG_CLK_VAL_DMA_CLK_RQT);
2546
2547         udelay(5);
2548
2549         if (exit_pending)
2550                 priv->cfg->ops->lib->apm_ops.stop(priv);
2551         else
2552                 priv->cfg->ops->lib->apm_ops.reset(priv);
2553
2554  exit:
2555         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2556
2557         if (priv->ibss_beacon)
2558                 dev_kfree_skb(priv->ibss_beacon);
2559         priv->ibss_beacon = NULL;
2560
2561         /* clear out any free frames */
2562         iwl3945_clear_free_frames(priv);
2563 }
2564
2565 static void iwl3945_down(struct iwl_priv *priv)
2566 {
2567         mutex_lock(&priv->mutex);
2568         __iwl3945_down(priv);
2569         mutex_unlock(&priv->mutex);
2570
2571         iwl3945_cancel_deferred_work(priv);
2572 }
2573
2574 #define MAX_HW_RESTARTS 5
2575
2576 static int __iwl3945_up(struct iwl_priv *priv)
2577 {
2578         int rc, i;
2579
2580         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2581                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2582                 return -EIO;
2583         }
2584
2585         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2586                 IWL_ERR(priv, "ucode not available for device bring up\n");
2587                 return -EIO;
2588         }
2589
2590         /* If platform's RF_KILL switch is NOT set to KILL */
2591         if (iwl_read32(priv, CSR_GP_CNTRL) &
2592                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2593                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2594         else {
2595                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2596                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2597                 return -ENODEV;
2598         }
2599
2600         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2601
2602         rc = iwl3945_hw_nic_init(priv);
2603         if (rc) {
2604                 IWL_ERR(priv, "Unable to int nic\n");
2605                 return rc;
2606         }
2607
2608         /* make sure rfkill handshake bits are cleared */
2609         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2610         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2611                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2612
2613         /* clear (again), then enable host interrupts */
2614         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2615         iwl_enable_interrupts(priv);
2616
2617         /* really make sure rfkill handshake bits are cleared */
2618         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2619         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2620
2621         /* Copy original ucode data image from disk into backup cache.
2622          * This will be used to initialize the on-board processor's
2623          * data SRAM for a clean start when the runtime program first loads. */
2624         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2625                priv->ucode_data.len);
2626
2627         /* We return success when we resume from suspend and rf_kill is on. */
2628         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2629                 return 0;
2630
2631         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2632
2633                 iwl_clear_stations_table(priv);
2634
2635                 /* load bootstrap state machine,
2636                  * load bootstrap program into processor's memory,
2637                  * prepare to load the "initialize" uCode */
2638                 priv->cfg->ops->lib->load_ucode(priv);
2639
2640                 if (rc) {
2641                         IWL_ERR(priv,
2642                                 "Unable to set up bootstrap uCode: %d\n", rc);
2643                         continue;
2644                 }
2645
2646                 /* start card; "initialize" will load runtime ucode */
2647                 iwl3945_nic_start(priv);
2648
2649                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2650
2651                 return 0;
2652         }
2653
2654         set_bit(STATUS_EXIT_PENDING, &priv->status);
2655         __iwl3945_down(priv);
2656         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2657
2658         /* tried to restart and config the device for as long as our
2659          * patience could withstand */
2660         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2661         return -EIO;
2662 }
2663
2664
2665 /*****************************************************************************
2666  *
2667  * Workqueue callbacks
2668  *
2669  *****************************************************************************/
2670
2671 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2672 {
2673         struct iwl_priv *priv =
2674             container_of(data, struct iwl_priv, init_alive_start.work);
2675
2676         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2677                 return;
2678
2679         mutex_lock(&priv->mutex);
2680         iwl3945_init_alive_start(priv);
2681         mutex_unlock(&priv->mutex);
2682 }
2683
2684 static void iwl3945_bg_alive_start(struct work_struct *data)
2685 {
2686         struct iwl_priv *priv =
2687             container_of(data, struct iwl_priv, alive_start.work);
2688
2689         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2690                 return;
2691
2692         mutex_lock(&priv->mutex);
2693         iwl3945_alive_start(priv);
2694         mutex_unlock(&priv->mutex);
2695 }
2696
2697 static void iwl3945_rfkill_poll(struct work_struct *data)
2698 {
2699         struct iwl_priv *priv =
2700             container_of(data, struct iwl_priv, rfkill_poll.work);
2701
2702         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2703                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2704         else
2705                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2706
2707         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2708                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2709
2710         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2711                            round_jiffies_relative(2 * HZ));
2712
2713 }
2714
2715 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2716 static void iwl3945_bg_request_scan(struct work_struct *data)
2717 {
2718         struct iwl_priv *priv =
2719             container_of(data, struct iwl_priv, request_scan);
2720         struct iwl_host_cmd cmd = {
2721                 .id = REPLY_SCAN_CMD,
2722                 .len = sizeof(struct iwl3945_scan_cmd),
2723                 .flags = CMD_SIZE_HUGE,
2724         };
2725         int rc = 0;
2726         struct iwl3945_scan_cmd *scan;
2727         struct ieee80211_conf *conf = NULL;
2728         u8 n_probes = 0;
2729         enum ieee80211_band band;
2730         bool is_active = false;
2731
2732         conf = ieee80211_get_hw_conf(priv->hw);
2733
2734         mutex_lock(&priv->mutex);
2735
2736         cancel_delayed_work(&priv->scan_check);
2737
2738         if (!iwl_is_ready(priv)) {
2739                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2740                 goto done;
2741         }
2742
2743         /* Make sure the scan wasn't canceled before this queued work
2744          * was given the chance to run... */
2745         if (!test_bit(STATUS_SCANNING, &priv->status))
2746                 goto done;
2747
2748         /* This should never be called or scheduled if there is currently
2749          * a scan active in the hardware. */
2750         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2751                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2752                                 "Ignoring second request.\n");
2753                 rc = -EIO;
2754                 goto done;
2755         }
2756
2757         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2758                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2759                 goto done;
2760         }
2761
2762         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2763                 IWL_DEBUG_HC(priv,
2764                         "Scan request while abort pending. Queuing.\n");
2765                 goto done;
2766         }
2767
2768         if (iwl_is_rfkill(priv)) {
2769                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2770                 goto done;
2771         }
2772
2773         if (!test_bit(STATUS_READY, &priv->status)) {
2774                 IWL_DEBUG_HC(priv,
2775                         "Scan request while uninitialized. Queuing.\n");
2776                 goto done;
2777         }
2778
2779         if (!priv->scan_bands) {
2780                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2781                 goto done;
2782         }
2783
2784         if (!priv->scan) {
2785                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2786                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2787                 if (!priv->scan) {
2788                         rc = -ENOMEM;
2789                         goto done;
2790                 }
2791         }
2792         scan = priv->scan;
2793         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2794
2795         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2796         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2797
2798         if (iwl_is_associated(priv)) {
2799                 u16 interval = 0;
2800                 u32 extra;
2801                 u32 suspend_time = 100;
2802                 u32 scan_suspend_time = 100;
2803                 unsigned long flags;
2804
2805                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2806
2807                 spin_lock_irqsave(&priv->lock, flags);
2808                 interval = priv->beacon_int;
2809                 spin_unlock_irqrestore(&priv->lock, flags);
2810
2811                 scan->suspend_time = 0;
2812                 scan->max_out_time = cpu_to_le32(200 * 1024);
2813                 if (!interval)
2814                         interval = suspend_time;
2815                 /*
2816                  * suspend time format:
2817                  *  0-19: beacon interval in usec (time before exec.)
2818                  * 20-23: 0
2819                  * 24-31: number of beacons (suspend between channels)
2820                  */
2821
2822                 extra = (suspend_time / interval) << 24;
2823                 scan_suspend_time = 0xFF0FFFFF &
2824                     (extra | ((suspend_time % interval) * 1024));
2825
2826                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2827                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2828                                scan_suspend_time, interval);
2829         }
2830
2831         if (priv->scan_request->n_ssids) {
2832                 int i, p = 0;
2833                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2834                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2835                         /* always does wildcard anyway */
2836                         if (!priv->scan_request->ssids[i].ssid_len)
2837                                 continue;
2838                         scan->direct_scan[p].id = WLAN_EID_SSID;
2839                         scan->direct_scan[p].len =
2840                                 priv->scan_request->ssids[i].ssid_len;
2841                         memcpy(scan->direct_scan[p].ssid,
2842                                priv->scan_request->ssids[i].ssid,
2843                                priv->scan_request->ssids[i].ssid_len);
2844                         n_probes++;
2845                         p++;
2846                 }
2847                 is_active = true;
2848         } else
2849                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2850
2851         /* We don't build a direct scan probe request; the uCode will do
2852          * that based on the direct_mask added to each channel entry */
2853         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2854         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2855         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2856
2857         /* flags + rate selection */
2858
2859         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2860                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2861                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2862                 scan->good_CRC_th = 0;
2863                 band = IEEE80211_BAND_2GHZ;
2864         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2865                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2866                 /*
2867                  * If active scaning is requested but a certain channel
2868                  * is marked passive, we can do active scanning if we
2869                  * detect transmissions.
2870                  */
2871                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2872                 band = IEEE80211_BAND_5GHZ;
2873         } else {
2874                 IWL_WARN(priv, "Invalid scan band count\n");
2875                 goto done;
2876         }
2877
2878         scan->tx_cmd.len = cpu_to_le16(
2879                         iwl_fill_probe_req(priv,
2880                                 (struct ieee80211_mgmt *)scan->data,
2881                                 priv->scan_request->ie,
2882                                 priv->scan_request->ie_len,
2883                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2884
2885         /* select Rx antennas */
2886         scan->flags |= iwl3945_get_antenna_flags(priv);
2887
2888         if (iwl_is_monitor_mode(priv))
2889                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2890
2891         scan->channel_count =
2892                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2893                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2894
2895         if (scan->channel_count == 0) {
2896                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2897                 goto done;
2898         }
2899
2900         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2901             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2902         cmd.data = scan;
2903         scan->len = cpu_to_le16(cmd.len);
2904
2905         set_bit(STATUS_SCAN_HW, &priv->status);
2906         rc = iwl_send_cmd_sync(priv, &cmd);
2907         if (rc)
2908                 goto done;
2909
2910         queue_delayed_work(priv->workqueue, &priv->scan_check,
2911                            IWL_SCAN_CHECK_WATCHDOG);
2912
2913         mutex_unlock(&priv->mutex);
2914         return;
2915
2916  done:
2917         /* can not perform scan make sure we clear scanning
2918          * bits from status so next scan request can be performed.
2919          * if we dont clear scanning status bit here all next scan
2920          * will fail
2921         */
2922         clear_bit(STATUS_SCAN_HW, &priv->status);
2923         clear_bit(STATUS_SCANNING, &priv->status);
2924
2925         /* inform mac80211 scan aborted */
2926         queue_work(priv->workqueue, &priv->scan_completed);
2927         mutex_unlock(&priv->mutex);
2928 }
2929
2930 static void iwl3945_bg_up(struct work_struct *data)
2931 {
2932         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2933
2934         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2935                 return;
2936
2937         mutex_lock(&priv->mutex);
2938         __iwl3945_up(priv);
2939         mutex_unlock(&priv->mutex);
2940 }
2941
2942 static void iwl3945_bg_restart(struct work_struct *data)
2943 {
2944         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2945
2946         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2947                 return;
2948
2949         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2950                 mutex_lock(&priv->mutex);
2951                 priv->vif = NULL;
2952                 priv->is_open = 0;
2953                 mutex_unlock(&priv->mutex);
2954                 iwl3945_down(priv);
2955                 ieee80211_restart_hw(priv->hw);
2956         } else {
2957                 iwl3945_down(priv);
2958                 queue_work(priv->workqueue, &priv->up);
2959         }
2960 }
2961
2962 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2963 {
2964         struct iwl_priv *priv =
2965             container_of(data, struct iwl_priv, rx_replenish);
2966
2967         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2968                 return;
2969
2970         mutex_lock(&priv->mutex);
2971         iwl3945_rx_replenish(priv);
2972         mutex_unlock(&priv->mutex);
2973 }
2974
2975 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2976
2977 void iwl3945_post_associate(struct iwl_priv *priv)
2978 {
2979         int rc = 0;
2980         struct ieee80211_conf *conf = NULL;
2981
2982         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2983                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2984                 return;
2985         }
2986
2987
2988         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2989                         priv->assoc_id, priv->active_rxon.bssid_addr);
2990
2991         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2992                 return;
2993
2994         if (!priv->vif || !priv->is_open)
2995                 return;
2996
2997         iwl_scan_cancel_timeout(priv, 200);
2998
2999         conf = ieee80211_get_hw_conf(priv->hw);
3000
3001         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3002         iwlcore_commit_rxon(priv);
3003
3004         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3005         iwl_setup_rxon_timing(priv);
3006         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3007                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3008         if (rc)
3009                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3010                             "Attempting to continue.\n");
3011
3012         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3013
3014         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3015
3016         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3017                         priv->assoc_id, priv->beacon_int);
3018
3019         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3020                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3021         else
3022                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3023
3024         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3025                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3026                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3027                 else
3028                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3029
3030                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3031                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3032
3033         }
3034
3035         iwlcore_commit_rxon(priv);
3036
3037         switch (priv->iw_mode) {
3038         case NL80211_IFTYPE_STATION:
3039                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3040                 break;
3041
3042         case NL80211_IFTYPE_ADHOC:
3043
3044                 priv->assoc_id = 1;
3045                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3046                 iwl3945_sync_sta(priv, IWL_STA_ID,
3047                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3048                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3049                                  CMD_ASYNC);
3050                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3051                 iwl3945_send_beacon_cmd(priv);
3052
3053                 break;
3054
3055         default:
3056                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3057                            __func__, priv->iw_mode);
3058                 break;
3059         }
3060
3061         iwl_activate_qos(priv, 0);
3062
3063         /* we have just associated, don't start scan too early */
3064         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3065 }
3066
3067 /*****************************************************************************
3068  *
3069  * mac80211 entry point functions
3070  *
3071  *****************************************************************************/
3072
3073 #define UCODE_READY_TIMEOUT     (2 * HZ)
3074
3075 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3076 {
3077         struct iwl_priv *priv = hw->priv;
3078         int ret;
3079
3080         IWL_DEBUG_MAC80211(priv, "enter\n");
3081
3082         /* we should be verifying the device is ready to be opened */
3083         mutex_lock(&priv->mutex);
3084
3085         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3086          * ucode filename and max sizes are card-specific. */
3087
3088         if (!priv->ucode_code.len) {
3089                 ret = iwl3945_read_ucode(priv);
3090                 if (ret) {
3091                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3092                         mutex_unlock(&priv->mutex);
3093                         goto out_release_irq;
3094                 }
3095         }
3096
3097         ret = __iwl3945_up(priv);
3098
3099         mutex_unlock(&priv->mutex);
3100
3101         if (ret)
3102                 goto out_release_irq;
3103
3104         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3105
3106         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3107          * mac80211 will not be run successfully. */
3108         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3109                         test_bit(STATUS_READY, &priv->status),
3110                         UCODE_READY_TIMEOUT);
3111         if (!ret) {
3112                 if (!test_bit(STATUS_READY, &priv->status)) {
3113                         IWL_ERR(priv,
3114                                 "Wait for START_ALIVE timeout after %dms.\n",
3115                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3116                         ret = -ETIMEDOUT;
3117                         goto out_release_irq;
3118                 }
3119         }
3120
3121         /* ucode is running and will send rfkill notifications,
3122          * no need to poll the killswitch state anymore */
3123         cancel_delayed_work(&priv->rfkill_poll);
3124
3125         priv->is_open = 1;
3126         IWL_DEBUG_MAC80211(priv, "leave\n");
3127         return 0;
3128
3129 out_release_irq:
3130         priv->is_open = 0;
3131         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3132         return ret;
3133 }
3134
3135 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3136 {
3137         struct iwl_priv *priv = hw->priv;
3138
3139         IWL_DEBUG_MAC80211(priv, "enter\n");
3140
3141         if (!priv->is_open) {
3142                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3143                 return;
3144         }
3145
3146         priv->is_open = 0;
3147
3148         if (iwl_is_ready_rf(priv)) {
3149                 /* stop mac, cancel any scan request and clear
3150                  * RXON_FILTER_ASSOC_MSK BIT
3151                  */
3152                 mutex_lock(&priv->mutex);
3153                 iwl_scan_cancel_timeout(priv, 100);
3154                 mutex_unlock(&priv->mutex);
3155         }
3156
3157         iwl3945_down(priv);
3158
3159         flush_workqueue(priv->workqueue);
3160
3161         /* start polling the killswitch state again */
3162         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3163                            round_jiffies_relative(2 * HZ));
3164
3165         IWL_DEBUG_MAC80211(priv, "leave\n");
3166 }
3167
3168 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3169 {
3170         struct iwl_priv *priv = hw->priv;
3171
3172         IWL_DEBUG_MAC80211(priv, "enter\n");
3173
3174         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3175                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3176
3177         if (iwl3945_tx_skb(priv, skb))
3178                 dev_kfree_skb_any(skb);
3179
3180         IWL_DEBUG_MAC80211(priv, "leave\n");
3181         return NETDEV_TX_OK;
3182 }
3183
3184 void iwl3945_config_ap(struct iwl_priv *priv)
3185 {
3186         int rc = 0;
3187
3188         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3189                 return;
3190
3191         /* The following should be done only at AP bring up */
3192         if (!(iwl_is_associated(priv))) {
3193
3194                 /* RXON - unassoc (to set timing command) */
3195                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3196                 iwlcore_commit_rxon(priv);
3197
3198                 /* RXON Timing */
3199                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3200                 iwl_setup_rxon_timing(priv);
3201                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3202                                       sizeof(priv->rxon_timing),
3203                                       &priv->rxon_timing);
3204                 if (rc)
3205                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3206                                         "Attempting to continue.\n");
3207
3208                 /* FIXME: what should be the assoc_id for AP? */
3209                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3210                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3211                         priv->staging_rxon.flags |=
3212                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3213                 else
3214                         priv->staging_rxon.flags &=
3215                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3216
3217                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3218                         if (priv->assoc_capability &
3219                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3220                                 priv->staging_rxon.flags |=
3221                                         RXON_FLG_SHORT_SLOT_MSK;
3222                         else
3223                                 priv->staging_rxon.flags &=
3224                                         ~RXON_FLG_SHORT_SLOT_MSK;
3225
3226                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3227                                 priv->staging_rxon.flags &=
3228                                         ~RXON_FLG_SHORT_SLOT_MSK;
3229                 }
3230                 /* restore RXON assoc */
3231                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3232                 iwlcore_commit_rxon(priv);
3233                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3234         }
3235         iwl3945_send_beacon_cmd(priv);
3236
3237         /* FIXME - we need to add code here to detect a totally new
3238          * configuration, reset the AP, unassoc, rxon timing, assoc,
3239          * clear sta table, add BCAST sta... */
3240 }
3241
3242 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3243                                struct ieee80211_vif *vif,
3244                                struct ieee80211_sta *sta,
3245                                struct ieee80211_key_conf *key)
3246 {
3247         struct iwl_priv *priv = hw->priv;
3248         const u8 *addr;
3249         int ret = 0;
3250         u8 sta_id = IWL_INVALID_STATION;
3251         u8 static_key;
3252
3253         IWL_DEBUG_MAC80211(priv, "enter\n");
3254
3255         if (iwl3945_mod_params.sw_crypto) {
3256                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3257                 return -EOPNOTSUPP;
3258         }
3259
3260         addr = sta ? sta->addr : iwl_bcast_addr;
3261         static_key = !iwl_is_associated(priv);
3262
3263         if (!static_key) {
3264                 sta_id = iwl_find_station(priv, addr);
3265                 if (sta_id == IWL_INVALID_STATION) {
3266                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3267                                             addr);
3268                         return -EINVAL;
3269                 }
3270         }
3271
3272         mutex_lock(&priv->mutex);
3273         iwl_scan_cancel_timeout(priv, 100);
3274         mutex_unlock(&priv->mutex);
3275
3276         switch (cmd) {
3277         case SET_KEY:
3278                 if (static_key)
3279                         ret = iwl3945_set_static_key(priv, key);
3280                 else
3281                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3282                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3283                 break;
3284         case DISABLE_KEY:
3285                 if (static_key)
3286                         ret = iwl3945_remove_static_key(priv);
3287                 else
3288                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3289                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3290                 break;
3291         default:
3292                 ret = -EINVAL;
3293         }
3294
3295         IWL_DEBUG_MAC80211(priv, "leave\n");
3296
3297         return ret;
3298 }
3299
3300 /*****************************************************************************
3301  *
3302  * sysfs attributes
3303  *
3304  *****************************************************************************/
3305
3306 #ifdef CONFIG_IWLWIFI_DEBUG
3307
3308 /*
3309  * The following adds a new attribute to the sysfs representation
3310  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3311  * used for controlling the debug level.
3312  *
3313  * See the level definitions in iwl for details.
3314  *
3315  * The debug_level being managed using sysfs below is a per device debug
3316  * level that is used instead of the global debug level if it (the per
3317  * device debug level) is set.
3318  */
3319 static ssize_t show_debug_level(struct device *d,
3320                                 struct device_attribute *attr, char *buf)
3321 {
3322         struct iwl_priv *priv = dev_get_drvdata(d);
3323         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3324 }
3325 static ssize_t store_debug_level(struct device *d,
3326                                 struct device_attribute *attr,
3327                                  const char *buf, size_t count)
3328 {
3329         struct iwl_priv *priv = dev_get_drvdata(d);
3330         unsigned long val;
3331         int ret;
3332
3333         ret = strict_strtoul(buf, 0, &val);
3334         if (ret)
3335                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3336         else {
3337                 priv->debug_level = val;
3338                 if (iwl_alloc_traffic_mem(priv))
3339                         IWL_ERR(priv,
3340                                 "Not enough memory to generate traffic log\n");
3341         }
3342         return strnlen(buf, count);
3343 }
3344
3345 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3346                         show_debug_level, store_debug_level);
3347
3348 #endif /* CONFIG_IWLWIFI_DEBUG */
3349
3350 static ssize_t show_temperature(struct device *d,
3351                                 struct device_attribute *attr, char *buf)
3352 {
3353         struct iwl_priv *priv = dev_get_drvdata(d);
3354
3355         if (!iwl_is_alive(priv))
3356                 return -EAGAIN;
3357
3358         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3359 }
3360
3361 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3362
3363 static ssize_t show_tx_power(struct device *d,
3364                              struct device_attribute *attr, char *buf)
3365 {
3366         struct iwl_priv *priv = dev_get_drvdata(d);
3367         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3368 }
3369
3370 static ssize_t store_tx_power(struct device *d,
3371                               struct device_attribute *attr,
3372                               const char *buf, size_t count)
3373 {
3374         struct iwl_priv *priv = dev_get_drvdata(d);
3375         char *p = (char *)buf;
3376         u32 val;
3377
3378         val = simple_strtoul(p, &p, 10);
3379         if (p == buf)
3380                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3381         else
3382                 iwl3945_hw_reg_set_txpower(priv, val);
3383
3384         return count;
3385 }
3386
3387 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3388
3389 static ssize_t show_flags(struct device *d,
3390                           struct device_attribute *attr, char *buf)
3391 {
3392         struct iwl_priv *priv = dev_get_drvdata(d);
3393
3394         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3395 }
3396
3397 static ssize_t store_flags(struct device *d,
3398                            struct device_attribute *attr,
3399                            const char *buf, size_t count)
3400 {
3401         struct iwl_priv *priv = dev_get_drvdata(d);
3402         u32 flags = simple_strtoul(buf, NULL, 0);
3403
3404         mutex_lock(&priv->mutex);
3405         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3406                 /* Cancel any currently running scans... */
3407                 if (iwl_scan_cancel_timeout(priv, 100))
3408                         IWL_WARN(priv, "Could not cancel scan.\n");
3409                 else {
3410                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3411                                        flags);
3412                         priv->staging_rxon.flags = cpu_to_le32(flags);
3413                         iwlcore_commit_rxon(priv);
3414                 }
3415         }
3416         mutex_unlock(&priv->mutex);
3417
3418         return count;
3419 }
3420
3421 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3422
3423 static ssize_t show_filter_flags(struct device *d,
3424                                  struct device_attribute *attr, char *buf)
3425 {
3426         struct iwl_priv *priv = dev_get_drvdata(d);
3427
3428         return sprintf(buf, "0x%04X\n",
3429                 le32_to_cpu(priv->active_rxon.filter_flags));
3430 }
3431
3432 static ssize_t store_filter_flags(struct device *d,
3433                                   struct device_attribute *attr,
3434                                   const char *buf, size_t count)
3435 {
3436         struct iwl_priv *priv = dev_get_drvdata(d);
3437         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3438
3439         mutex_lock(&priv->mutex);
3440         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3441                 /* Cancel any currently running scans... */
3442                 if (iwl_scan_cancel_timeout(priv, 100))
3443                         IWL_WARN(priv, "Could not cancel scan.\n");
3444                 else {
3445                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3446                                        "0x%04X\n", filter_flags);
3447                         priv->staging_rxon.filter_flags =
3448                                 cpu_to_le32(filter_flags);
3449                         iwlcore_commit_rxon(priv);
3450                 }
3451         }
3452         mutex_unlock(&priv->mutex);
3453
3454         return count;
3455 }
3456
3457 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3458                    store_filter_flags);
3459
3460 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3461
3462 static ssize_t show_measurement(struct device *d,
3463                                 struct device_attribute *attr, char *buf)
3464 {
3465         struct iwl_priv *priv = dev_get_drvdata(d);
3466         struct iwl_spectrum_notification measure_report;
3467         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3468         u8 *data = (u8 *)&measure_report;
3469         unsigned long flags;
3470
3471         spin_lock_irqsave(&priv->lock, flags);
3472         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3473                 spin_unlock_irqrestore(&priv->lock, flags);
3474                 return 0;
3475         }
3476         memcpy(&measure_report, &priv->measure_report, size);
3477         priv->measurement_status = 0;
3478         spin_unlock_irqrestore(&priv->lock, flags);
3479
3480         while (size && (PAGE_SIZE - len)) {
3481                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3482                                    PAGE_SIZE - len, 1);
3483                 len = strlen(buf);
3484                 if (PAGE_SIZE - len)
3485                         buf[len++] = '\n';
3486
3487                 ofs += 16;
3488                 size -= min(size, 16U);
3489         }
3490
3491         return len;
3492 }
3493
3494 static ssize_t store_measurement(struct device *d,
3495                                  struct device_attribute *attr,
3496                                  const char *buf, size_t count)
3497 {
3498         struct iwl_priv *priv = dev_get_drvdata(d);
3499         struct ieee80211_measurement_params params = {
3500                 .channel = le16_to_cpu(priv->active_rxon.channel),
3501                 .start_time = cpu_to_le64(priv->last_tsf),
3502                 .duration = cpu_to_le16(1),
3503         };
3504         u8 type = IWL_MEASURE_BASIC;
3505         u8 buffer[32];
3506         u8 channel;
3507
3508         if (count) {
3509                 char *p = buffer;
3510                 strncpy(buffer, buf, min(sizeof(buffer), count));
3511                 channel = simple_strtoul(p, NULL, 0);
3512                 if (channel)
3513                         params.channel = channel;
3514
3515                 p = buffer;
3516                 while (*p && *p != ' ')
3517                         p++;
3518                 if (*p)
3519                         type = simple_strtoul(p + 1, NULL, 0);
3520         }
3521
3522         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3523                        "channel %d (for '%s')\n", type, params.channel, buf);
3524         iwl3945_get_measurement(priv, &params, type);
3525
3526         return count;
3527 }
3528
3529 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3530                    show_measurement, store_measurement);
3531 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3532
3533 static ssize_t store_retry_rate(struct device *d,
3534                                 struct device_attribute *attr,
3535                                 const char *buf, size_t count)
3536 {
3537         struct iwl_priv *priv = dev_get_drvdata(d);
3538
3539         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3540         if (priv->retry_rate <= 0)
3541                 priv->retry_rate = 1;
3542
3543         return count;
3544 }
3545
3546 static ssize_t show_retry_rate(struct device *d,
3547                                struct device_attribute *attr, char *buf)
3548 {
3549         struct iwl_priv *priv = dev_get_drvdata(d);
3550         return sprintf(buf, "%d", priv->retry_rate);
3551 }
3552
3553 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3554                    store_retry_rate);
3555
3556
3557 static ssize_t show_channels(struct device *d,
3558                              struct device_attribute *attr, char *buf)
3559 {
3560         /* all this shit doesn't belong into sysfs anyway */
3561         return 0;
3562 }
3563
3564 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3565
3566 static ssize_t show_statistics(struct device *d,
3567                                struct device_attribute *attr, char *buf)
3568 {
3569         struct iwl_priv *priv = dev_get_drvdata(d);
3570         u32 size = sizeof(struct iwl3945_notif_statistics);
3571         u32 len = 0, ofs = 0;
3572         u8 *data = (u8 *)&priv->statistics_39;
3573         int rc = 0;
3574
3575         if (!iwl_is_alive(priv))
3576                 return -EAGAIN;
3577
3578         mutex_lock(&priv->mutex);
3579         rc = iwl_send_statistics_request(priv, 0);
3580         mutex_unlock(&priv->mutex);
3581
3582         if (rc) {
3583                 len = sprintf(buf,
3584                               "Error sending statistics request: 0x%08X\n", rc);
3585                 return len;
3586         }
3587
3588         while (size && (PAGE_SIZE - len)) {
3589                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3590                                    PAGE_SIZE - len, 1);
3591                 len = strlen(buf);
3592                 if (PAGE_SIZE - len)
3593                         buf[len++] = '\n';
3594
3595                 ofs += 16;
3596                 size -= min(size, 16U);
3597         }
3598
3599         return len;
3600 }
3601
3602 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3603
3604 static ssize_t show_antenna(struct device *d,
3605                             struct device_attribute *attr, char *buf)
3606 {
3607         struct iwl_priv *priv = dev_get_drvdata(d);
3608
3609         if (!iwl_is_alive(priv))
3610                 return -EAGAIN;
3611
3612         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3613 }
3614
3615 static ssize_t store_antenna(struct device *d,
3616                              struct device_attribute *attr,
3617                              const char *buf, size_t count)
3618 {
3619         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3620         int ant;
3621
3622         if (count == 0)
3623                 return 0;
3624
3625         if (sscanf(buf, "%1i", &ant) != 1) {
3626                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3627                 return count;
3628         }
3629
3630         if ((ant >= 0) && (ant <= 2)) {
3631                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3632                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3633         } else
3634                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3635
3636
3637         return count;
3638 }
3639
3640 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3641
3642 static ssize_t show_status(struct device *d,
3643                            struct device_attribute *attr, char *buf)
3644 {
3645         struct iwl_priv *priv = dev_get_drvdata(d);
3646         if (!iwl_is_alive(priv))
3647                 return -EAGAIN;
3648         return sprintf(buf, "0x%08x\n", (int)priv->status);
3649 }
3650
3651 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3652
3653 static ssize_t dump_error_log(struct device *d,
3654                               struct device_attribute *attr,
3655                               const char *buf, size_t count)
3656 {
3657         struct iwl_priv *priv = dev_get_drvdata(d);
3658         char *p = (char *)buf;
3659
3660         if (p[0] == '1')
3661                 iwl3945_dump_nic_error_log(priv);
3662
3663         return strnlen(buf, count);
3664 }
3665
3666 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3667
3668 static ssize_t dump_event_log(struct device *d,
3669                               struct device_attribute *attr,
3670                               const char *buf, size_t count)
3671 {
3672         struct iwl_priv *priv = dev_get_drvdata(d);
3673         char *p = (char *)buf;
3674
3675         if (p[0] == '1')
3676                 iwl3945_dump_nic_event_log(priv);
3677
3678         return strnlen(buf, count);
3679 }
3680
3681 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
3682
3683 /*****************************************************************************
3684  *
3685  * driver setup and tear down
3686  *
3687  *****************************************************************************/
3688
3689 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3690 {
3691         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3692
3693         init_waitqueue_head(&priv->wait_command_queue);
3694
3695         INIT_WORK(&priv->up, iwl3945_bg_up);
3696         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3697         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3698         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3699         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3700         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3701         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3702         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3703         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3704         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3705         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3706
3707         iwl3945_hw_setup_deferred_work(priv);
3708
3709         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3710                      iwl3945_irq_tasklet, (unsigned long)priv);
3711 }
3712
3713 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3714 {
3715         iwl3945_hw_cancel_deferred_work(priv);
3716
3717         cancel_delayed_work_sync(&priv->init_alive_start);
3718         cancel_delayed_work(&priv->scan_check);
3719         cancel_delayed_work(&priv->alive_start);
3720         cancel_work_sync(&priv->beacon_update);
3721 }
3722
3723 static struct attribute *iwl3945_sysfs_entries[] = {
3724         &dev_attr_antenna.attr,
3725         &dev_attr_channels.attr,
3726         &dev_attr_dump_errors.attr,
3727         &dev_attr_dump_events.attr,
3728         &dev_attr_flags.attr,
3729         &dev_attr_filter_flags.attr,
3730 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3731         &dev_attr_measurement.attr,
3732 #endif
3733         &dev_attr_retry_rate.attr,
3734         &dev_attr_statistics.attr,
3735         &dev_attr_status.attr,
3736         &dev_attr_temperature.attr,
3737         &dev_attr_tx_power.attr,
3738 #ifdef CONFIG_IWLWIFI_DEBUG
3739         &dev_attr_debug_level.attr,
3740 #endif
3741         NULL
3742 };
3743
3744 static struct attribute_group iwl3945_attribute_group = {
3745         .name = NULL,           /* put in device directory */
3746         .attrs = iwl3945_sysfs_entries,
3747 };
3748
3749 static struct ieee80211_ops iwl3945_hw_ops = {
3750         .tx = iwl3945_mac_tx,
3751         .start = iwl3945_mac_start,
3752         .stop = iwl3945_mac_stop,
3753         .add_interface = iwl_mac_add_interface,
3754         .remove_interface = iwl_mac_remove_interface,
3755         .config = iwl_mac_config,
3756         .configure_filter = iwl_configure_filter,
3757         .set_key = iwl3945_mac_set_key,
3758         .get_tx_stats = iwl_mac_get_tx_stats,
3759         .conf_tx = iwl_mac_conf_tx,
3760         .reset_tsf = iwl_mac_reset_tsf,
3761         .bss_info_changed = iwl_bss_info_changed,
3762         .hw_scan = iwl_mac_hw_scan
3763 };
3764
3765 static int iwl3945_init_drv(struct iwl_priv *priv)
3766 {
3767         int ret;
3768         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3769
3770         priv->retry_rate = 1;
3771         priv->ibss_beacon = NULL;
3772
3773         spin_lock_init(&priv->lock);
3774         spin_lock_init(&priv->sta_lock);
3775         spin_lock_init(&priv->hcmd_lock);
3776
3777         INIT_LIST_HEAD(&priv->free_frames);
3778
3779         mutex_init(&priv->mutex);
3780
3781         /* Clear the driver's (not device's) station table */
3782         iwl_clear_stations_table(priv);
3783
3784         priv->data_retry_limit = -1;
3785         priv->ieee_channels = NULL;
3786         priv->ieee_rates = NULL;
3787         priv->band = IEEE80211_BAND_2GHZ;
3788
3789         priv->iw_mode = NL80211_IFTYPE_STATION;
3790
3791         iwl_reset_qos(priv);
3792
3793         priv->qos_data.qos_active = 0;
3794         priv->qos_data.qos_cap.val = 0;
3795
3796         priv->rates_mask = IWL_RATES_MASK;
3797         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3798
3799         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3800                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3801                          eeprom->version);
3802                 ret = -EINVAL;
3803                 goto err;
3804         }
3805         ret = iwl_init_channel_map(priv);
3806         if (ret) {
3807                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3808                 goto err;
3809         }
3810
3811         /* Set up txpower settings in driver for all channels */
3812         if (iwl3945_txpower_set_from_eeprom(priv)) {
3813                 ret = -EIO;
3814                 goto err_free_channel_map;
3815         }
3816
3817         ret = iwlcore_init_geos(priv);
3818         if (ret) {
3819                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3820                 goto err_free_channel_map;
3821         }
3822         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3823
3824         return 0;
3825
3826 err_free_channel_map:
3827         iwl_free_channel_map(priv);
3828 err:
3829         return ret;
3830 }
3831
3832 static int iwl3945_setup_mac(struct iwl_priv *priv)
3833 {
3834         int ret;
3835         struct ieee80211_hw *hw = priv->hw;
3836
3837         hw->rate_control_algorithm = "iwl-3945-rs";
3838         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3839
3840         /* Tell mac80211 our characteristics */
3841         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3842                     IEEE80211_HW_NOISE_DBM |
3843                     IEEE80211_HW_SPECTRUM_MGMT |
3844                     IEEE80211_HW_SUPPORTS_PS |
3845                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3846
3847         hw->wiphy->interface_modes =
3848                 BIT(NL80211_IFTYPE_STATION) |
3849                 BIT(NL80211_IFTYPE_ADHOC);
3850
3851         hw->wiphy->custom_regulatory = true;
3852
3853         /* Firmware does not support this */
3854         hw->wiphy->disable_beacon_hints = true;
3855
3856         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3857         /* we create the 802.11 header and a zero-length SSID element */
3858         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3859
3860         /* Default value; 4 EDCA QOS priorities */
3861         hw->queues = 4;
3862
3863         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3864                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3865                         &priv->bands[IEEE80211_BAND_2GHZ];
3866
3867         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3868                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3869                         &priv->bands[IEEE80211_BAND_5GHZ];
3870
3871         ret = ieee80211_register_hw(priv->hw);
3872         if (ret) {
3873                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3874                 return ret;
3875         }
3876         priv->mac80211_registered = 1;
3877
3878         return 0;
3879 }
3880
3881 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3882 {
3883         int err = 0;
3884         struct iwl_priv *priv;
3885         struct ieee80211_hw *hw;
3886         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3887         struct iwl3945_eeprom *eeprom;
3888         unsigned long flags;
3889
3890         /***********************
3891          * 1. Allocating HW data
3892          * ********************/
3893
3894         /* mac80211 allocates memory for this device instance, including
3895          *   space for this driver's private structure */
3896         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3897         if (hw == NULL) {
3898                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3899                 err = -ENOMEM;
3900                 goto out;
3901         }
3902         priv = hw->priv;
3903         SET_IEEE80211_DEV(hw, &pdev->dev);
3904
3905         /*
3906          * Disabling hardware scan means that mac80211 will perform scans
3907          * "the hard way", rather than using device's scan.
3908          */
3909         if (iwl3945_mod_params.disable_hw_scan) {
3910                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3911                 iwl3945_hw_ops.hw_scan = NULL;
3912         }
3913
3914
3915         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3916         priv->cfg = cfg;
3917         priv->pci_dev = pdev;
3918         priv->inta_mask = CSR_INI_SET_MASK;
3919
3920 #ifdef CONFIG_IWLWIFI_DEBUG
3921         atomic_set(&priv->restrict_refcnt, 0);
3922 #endif
3923         if (iwl_alloc_traffic_mem(priv))
3924                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3925
3926         /***************************
3927          * 2. Initializing PCI bus
3928          * *************************/
3929         if (pci_enable_device(pdev)) {
3930                 err = -ENODEV;
3931                 goto out_ieee80211_free_hw;
3932         }
3933
3934         pci_set_master(pdev);
3935
3936         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3937         if (!err)
3938                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3939         if (err) {
3940                 IWL_WARN(priv, "No suitable DMA available.\n");
3941                 goto out_pci_disable_device;
3942         }
3943
3944         pci_set_drvdata(pdev, priv);
3945         err = pci_request_regions(pdev, DRV_NAME);
3946         if (err)
3947                 goto out_pci_disable_device;
3948
3949         /***********************
3950          * 3. Read REV Register
3951          * ********************/
3952         priv->hw_base = pci_iomap(pdev, 0, 0);
3953         if (!priv->hw_base) {
3954                 err = -ENODEV;
3955                 goto out_pci_release_regions;
3956         }
3957
3958         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3959                         (unsigned long long) pci_resource_len(pdev, 0));
3960         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3961
3962         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3963          * PCI Tx retries from interfering with C3 CPU state */
3964         pci_write_config_byte(pdev, 0x41, 0x00);
3965
3966         /* this spin lock will be used in apm_ops.init and EEPROM access
3967          * we should init now
3968          */
3969         spin_lock_init(&priv->reg_lock);
3970
3971         /* amp init */
3972         err = priv->cfg->ops->lib->apm_ops.init(priv);
3973         if (err < 0) {
3974                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
3975                 goto out_iounmap;
3976         }
3977
3978         /***********************
3979          * 4. Read EEPROM
3980          * ********************/
3981
3982         /* Read the EEPROM */
3983         err = iwl_eeprom_init(priv);
3984         if (err) {
3985                 IWL_ERR(priv, "Unable to init EEPROM\n");
3986                 goto out_iounmap;
3987         }
3988         /* MAC Address location in EEPROM same for 3945/4965 */
3989         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3990         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
3991         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3992         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3993
3994         /***********************
3995          * 5. Setup HW Constants
3996          * ********************/
3997         /* Device-specific setup */
3998         if (iwl3945_hw_set_hw_params(priv)) {
3999                 IWL_ERR(priv, "failed to set hw settings\n");
4000                 goto out_eeprom_free;
4001         }
4002
4003         /***********************
4004          * 6. Setup priv
4005          * ********************/
4006
4007         err = iwl3945_init_drv(priv);
4008         if (err) {
4009                 IWL_ERR(priv, "initializing driver failed\n");
4010                 goto out_unset_hw_params;
4011         }
4012
4013         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4014                 priv->cfg->name);
4015
4016         /***********************
4017          * 7. Setup Services
4018          * ********************/
4019
4020         spin_lock_irqsave(&priv->lock, flags);
4021         iwl_disable_interrupts(priv);
4022         spin_unlock_irqrestore(&priv->lock, flags);
4023
4024         pci_enable_msi(priv->pci_dev);
4025
4026         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4027                           IRQF_SHARED, DRV_NAME, priv);
4028         if (err) {
4029                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4030                 goto out_disable_msi;
4031         }
4032
4033         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4034         if (err) {
4035                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4036                 goto out_release_irq;
4037         }
4038
4039         iwl_set_rxon_channel(priv,
4040                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4041         iwl3945_setup_deferred_work(priv);
4042         iwl3945_setup_rx_handlers(priv);
4043
4044         /*********************************
4045          * 8. Setup and Register mac80211
4046          * *******************************/
4047
4048         iwl_enable_interrupts(priv);
4049
4050         err = iwl3945_setup_mac(priv);
4051         if (err)
4052                 goto  out_remove_sysfs;
4053
4054         err = iwl_dbgfs_register(priv, DRV_NAME);
4055         if (err)
4056                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4057
4058         /* Start monitoring the killswitch */
4059         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4060                            2 * HZ);
4061
4062         return 0;
4063
4064  out_remove_sysfs:
4065         destroy_workqueue(priv->workqueue);
4066         priv->workqueue = NULL;
4067         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4068  out_release_irq:
4069         free_irq(priv->pci_dev->irq, priv);
4070  out_disable_msi:
4071         pci_disable_msi(priv->pci_dev);
4072         iwlcore_free_geos(priv);
4073         iwl_free_channel_map(priv);
4074  out_unset_hw_params:
4075         iwl3945_unset_hw_params(priv);
4076  out_eeprom_free:
4077         iwl_eeprom_free(priv);
4078  out_iounmap:
4079         pci_iounmap(pdev, priv->hw_base);
4080  out_pci_release_regions:
4081         pci_release_regions(pdev);
4082  out_pci_disable_device:
4083         pci_set_drvdata(pdev, NULL);
4084         pci_disable_device(pdev);
4085  out_ieee80211_free_hw:
4086         ieee80211_free_hw(priv->hw);
4087         iwl_free_traffic_mem(priv);
4088  out:
4089         return err;
4090 }
4091
4092 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4093 {
4094         struct iwl_priv *priv = pci_get_drvdata(pdev);
4095         unsigned long flags;
4096
4097         if (!priv)
4098                 return;
4099
4100         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4101
4102         iwl_dbgfs_unregister(priv);
4103
4104         set_bit(STATUS_EXIT_PENDING, &priv->status);
4105
4106         if (priv->mac80211_registered) {
4107                 ieee80211_unregister_hw(priv->hw);
4108                 priv->mac80211_registered = 0;
4109         } else {
4110                 iwl3945_down(priv);
4111         }
4112
4113         /* make sure we flush any pending irq or
4114          * tasklet for the driver
4115          */
4116         spin_lock_irqsave(&priv->lock, flags);
4117         iwl_disable_interrupts(priv);
4118         spin_unlock_irqrestore(&priv->lock, flags);
4119
4120         iwl_synchronize_irq(priv);
4121
4122         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4123
4124         cancel_delayed_work_sync(&priv->rfkill_poll);
4125
4126         iwl3945_dealloc_ucode_pci(priv);
4127
4128         if (priv->rxq.bd)
4129                 iwl3945_rx_queue_free(priv, &priv->rxq);
4130         iwl3945_hw_txq_ctx_free(priv);
4131
4132         iwl3945_unset_hw_params(priv);
4133         iwl_clear_stations_table(priv);
4134
4135         /*netif_stop_queue(dev); */
4136         flush_workqueue(priv->workqueue);
4137
4138         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4139          * priv->workqueue... so we can't take down the workqueue
4140          * until now... */
4141         destroy_workqueue(priv->workqueue);
4142         priv->workqueue = NULL;
4143         iwl_free_traffic_mem(priv);
4144
4145         free_irq(pdev->irq, priv);
4146         pci_disable_msi(pdev);
4147
4148         pci_iounmap(pdev, priv->hw_base);
4149         pci_release_regions(pdev);
4150         pci_disable_device(pdev);
4151         pci_set_drvdata(pdev, NULL);
4152
4153         iwl_free_channel_map(priv);
4154         iwlcore_free_geos(priv);
4155         kfree(priv->scan);
4156         if (priv->ibss_beacon)
4157                 dev_kfree_skb(priv->ibss_beacon);
4158
4159         ieee80211_free_hw(priv->hw);
4160 }
4161
4162
4163 /*****************************************************************************
4164  *
4165  * driver and module entry point
4166  *
4167  *****************************************************************************/
4168
4169 static struct pci_driver iwl3945_driver = {
4170         .name = DRV_NAME,
4171         .id_table = iwl3945_hw_card_ids,
4172         .probe = iwl3945_pci_probe,
4173         .remove = __devexit_p(iwl3945_pci_remove),
4174 #ifdef CONFIG_PM
4175         .suspend = iwl_pci_suspend,
4176         .resume = iwl_pci_resume,
4177 #endif
4178 };
4179
4180 static int __init iwl3945_init(void)
4181 {
4182
4183         int ret;
4184         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4185         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4186
4187         ret = iwl3945_rate_control_register();
4188         if (ret) {
4189                 printk(KERN_ERR DRV_NAME
4190                        "Unable to register rate control algorithm: %d\n", ret);
4191                 return ret;
4192         }
4193
4194         ret = pci_register_driver(&iwl3945_driver);
4195         if (ret) {
4196                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4197                 goto error_register;
4198         }
4199
4200         return ret;
4201
4202 error_register:
4203         iwl3945_rate_control_unregister();
4204         return ret;
4205 }
4206
4207 static void __exit iwl3945_exit(void)
4208 {
4209         pci_unregister_driver(&iwl3945_driver);
4210         iwl3945_rate_control_unregister();
4211 }
4212
4213 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4214
4215 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4216 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4217 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4218 MODULE_PARM_DESC(swcrypto,
4219                  "using software crypto (default 1 [software])\n");
4220 #ifdef CONFIG_IWLWIFI_DEBUG
4221 module_param_named(debug, iwl_debug_level, uint, 0644);
4222 MODULE_PARM_DESC(debug, "debug output mask");
4223 #endif
4224 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4225 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4226 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4227 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4228
4229 module_exit(iwl3945_exit);
4230 module_init(iwl3945_init);