drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/lib80211.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-helpers.h"
  57 #include "iwl-core.h"
  58 #include "iwl-dev.h"
  59
  60 /*
  61  * module name, copyright, version, etc.
  62  */
  63
  64 #define DRV_DESCRIPTION \
  65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 #define VD "d"
  69 #else
  70 #define VD
  71 #endif
  72
  73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  74 #define VS "s"
  75 #else
  76 #define VS
  77 #endif
  78
  79 #define IWL39_VERSION "1.2.26k" VD VS
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82 #define DRV_VERSION     IWL39_VERSION
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89
  90  /* module parameters */
  91 struct iwl_mod_params iwl3945_mod_params = {
  92         .num_of_queues = IWL39_MAX_NUM_QUEUES,
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /**
  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_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_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_cmd *out_cmd = NULL;
 480         dma_addr_t phys_addr;
 481         dma_addr_t txcmd_phys;
 482         int txq_id = skb_get_queue_mapping(skb);
 483         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 484         u8 id;
 485         u8 unicast;
 486         u8 sta_id;
 487         u8 tid = 0;
 488         u16 seq_number = 0;
 489         __le16 fc;
 490         u8 wait_write_ptr = 0;
 491         u8 *qc = NULL;
 492         unsigned long flags;
 493         int rc;
 494
 495         spin_lock_irqsave(&priv->lock, flags);
 496         if (iwl_is_rfkill(priv)) {
 497                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 498                 goto drop_unlock;
 499         }
 500
 501         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 502                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 503                 goto drop_unlock;
 504         }
 505
 506         unicast = !is_multicast_ether_addr(hdr->addr1);
 507         id = 0;
 508
 509         fc = hdr->frame_control;
 510
 511 #ifdef CONFIG_IWLWIFI_DEBUG
 512         if (ieee80211_is_auth(fc))
 513                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 514         else if (ieee80211_is_assoc_req(fc))
 515                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 516         else if (ieee80211_is_reassoc_req(fc))
 517                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 518 #endif
 519
 520         /* drop all data frame if we are not associated */
 521         if (ieee80211_is_data(fc) &&
 522             (!iwl_is_monitor_mode(priv)) && /* packet injection */
 523             (!iwl_is_associated(priv) ||
 524              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 525                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 526                 goto drop_unlock;
 527         }
 528
 529         spin_unlock_irqrestore(&priv->lock, flags);
 530
 531         hdr_len = ieee80211_hdrlen(fc);
 532
 533         /* Find (or create) index into station table for destination station */
 534         sta_id = iwl_get_sta_id(priv, hdr);
 535         if (sta_id == IWL_INVALID_STATION) {
 536                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 537                                hdr->addr1);
 538                 goto drop;
 539         }
 540
 541         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 542
 543         if (ieee80211_is_data_qos(fc)) {
 544                 qc = ieee80211_get_qos_ctl(hdr);
 545                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 546                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 547                                 IEEE80211_SCTL_SEQ;
 548                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 549                         (hdr->seq_ctrl &
 550                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 551                 seq_number += 0x10;
 552         }
 553
 554         /* Descriptor for chosen Tx queue */
 555         txq = &priv->txq[txq_id];
 556         q = &txq->q;
 557
 558         spin_lock_irqsave(&priv->lock, flags);
 559
 560         idx = get_cmd_index(q, q->write_ptr, 0);
 561
 562         /* Set up driver data for this TFD */
 563         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 564         txq->txb[q->write_ptr].skb[0] = skb;
 565
 566         /* Init first empty entry in queue's array of Tx/cmd buffers */
 567         out_cmd = txq->cmd[idx];
 568         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 569         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 570         memset(tx, 0, sizeof(*tx));
 571
 572         /*
 573          * Set up the Tx-command (not MAC!) header.
 574          * Store the chosen Tx queue and TFD index within the sequence field;
 575          * after Tx, uCode's Tx response will return this value so driver can
 576          * locate the frame within the tx queue and do post-tx processing.
 577          */
 578         out_cmd->hdr.cmd = REPLY_TX;
 579         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 580                                 INDEX_TO_SEQ(q->write_ptr)));
 581
 582         /* Copy MAC header from skb into command buffer */
 583         memcpy(tx->hdr, hdr, hdr_len);
 584
 585
 586         if (info->control.hw_key)
 587                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 588
 589         /* TODO need this for burst mode later on */
 590         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 591
 592         /* set is_hcca to 0; it probably will never be implemented */
 593         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 594
 595         /* Total # bytes to be transmitted */
 596         len = (u16)skb->len;
 597         tx->len = cpu_to_le16(len);
 598
 599
 600         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 601         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 602
 603         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 604                 txq->need_update = 1;
 605                 if (qc)
 606                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 607         } else {
 608                 wait_write_ptr = 1;
 609                 txq->need_update = 0;
 610         }
 611
 612         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 613                      le16_to_cpu(out_cmd->hdr.sequence));
 614         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 615         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 616         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 617                            ieee80211_hdrlen(fc));
 618
 619         /*
 620          * Use the first empty entry in this queue's command buffer array
 621          * to contain the Tx command and MAC header concatenated together
 622          * (payload data will be in another buffer).
 623          * Size of this varies, due to varying MAC header length.
 624          * If end is not dword aligned, we'll have 2 extra bytes at the end
 625          * of the MAC header (device reads on dword boundaries).
 626          * We'll tell device about this padding later.
 627          */
 628         len = sizeof(struct iwl3945_tx_cmd) +
 629                         sizeof(struct iwl_cmd_header) + hdr_len;
 630
 631         len_org = len;
 632         len = (len + 3) & ~3;
 633
 634         if (len_org != len)
 635                 len_org = 1;
 636         else
 637                 len_org = 0;
 638
 639         /* Physical address of this Tx command's header (not MAC header!),
 640          * within command buffer array. */
 641         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 642                                     len, PCI_DMA_TODEVICE);
 643         /* we do not map meta data ... so we can safely access address to
 644          * provide to unmap command*/
 645         pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys);
 646         pci_unmap_len_set(&out_cmd->meta, len, len);
 647
 648         /* Add buffer containing Tx command and MAC(!) header to TFD's
 649          * first entry */
 650         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 651                                                    txcmd_phys, len, 1, 0);
 652
 653
 654         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 655          * if any (802.11 null frames have no payload). */
 656         len = skb->len - hdr_len;
 657         if (len) {
 658                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 659                                            len, PCI_DMA_TODEVICE);
 660                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 661                                                            phys_addr, len,
 662                                                            0, U32_PAD(len));
 663         }
 664
 665
 666         /* Tell device the write index *just past* this latest filled TFD */
 667         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 668         rc = iwl_txq_update_write_ptr(priv, txq);
 669         spin_unlock_irqrestore(&priv->lock, flags);
 670
 671         if (rc)
 672                 return rc;
 673
 674         if ((iwl_queue_space(q) < q->high_mark)
 675             && priv->mac80211_registered) {
 676                 if (wait_write_ptr) {
 677                         spin_lock_irqsave(&priv->lock, flags);
 678                         txq->need_update = 1;
 679                         iwl_txq_update_write_ptr(priv, txq);
 680                         spin_unlock_irqrestore(&priv->lock, flags);
 681                 }
 682
 683                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 684         }
 685
 686         return 0;
 687
 688 drop_unlock:
 689         spin_unlock_irqrestore(&priv->lock, flags);
 690 drop:
 691         return -1;
 692 }
 693
 694 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 695
 696 #include "iwl-spectrum.h"
 697
 698 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 699 #define BEACON_TIME_MASK_HIGH   0xFF000000
 700 #define TIME_UNIT               1024
 701
 702 /*
 703  * extended beacon time format
 704  * time in usec will be changed into a 32-bit value in 8:24 format
 705  * the high 1 byte is the beacon counts
 706  * the lower 3 bytes is the time in usec within one beacon interval
 707  */
 708
 709 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 710 {
 711         u32 quot;
 712         u32 rem;
 713         u32 interval = beacon_interval * 1024;
 714
 715         if (!interval || !usec)
 716                 return 0;
 717
 718         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 719         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 720
 721         return (quot << 24) + rem;
 722 }
 723
 724 /* base is usually what we get from ucode with each received frame,
 725  * the same as HW timer counter counting down
 726  */
 727
 728 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 729 {
 730         u32 base_low = base & BEACON_TIME_MASK_LOW;
 731         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 732         u32 interval = beacon_interval * TIME_UNIT;
 733         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 734             (addon & BEACON_TIME_MASK_HIGH);
 735
 736         if (base_low > addon_low)
 737                 res += base_low - addon_low;
 738         else if (base_low < addon_low) {
 739                 res += interval + base_low - addon_low;
 740                 res += (1 << 24);
 741         } else
 742                 res += (1 << 24);
 743
 744         return cpu_to_le32(res);
 745 }
 746
 747 static int iwl3945_get_measurement(struct iwl_priv *priv,
 748                                struct ieee80211_measurement_params *params,
 749                                u8 type)
 750 {
 751         struct iwl_spectrum_cmd spectrum;
 752         struct iwl_rx_packet *res;
 753         struct iwl_host_cmd cmd = {
 754                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 755                 .data = (void *)&spectrum,
 756                 .meta.flags = CMD_WANT_SKB,
 757         };
 758         u32 add_time = le64_to_cpu(params->start_time);
 759         int rc;
 760         int spectrum_resp_status;
 761         int duration = le16_to_cpu(params->duration);
 762
 763         if (iwl_is_associated(priv))
 764                 add_time =
 765                     iwl3945_usecs_to_beacons(
 766                         le64_to_cpu(params->start_time) - priv->last_tsf,
 767                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 768
 769         memset(&spectrum, 0, sizeof(spectrum));
 770
 771         spectrum.channel_count = cpu_to_le16(1);
 772         spectrum.flags =
 773             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 774         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 775         cmd.len = sizeof(spectrum);
 776         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 777
 778         if (iwl_is_associated(priv))
 779                 spectrum.start_time =
 780                     iwl3945_add_beacon_time(priv->last_beacon_time,
 781                                 add_time,
 782                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 783         else
 784                 spectrum.start_time = 0;
 785
 786         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 787         spectrum.channels[0].channel = params->channel;
 788         spectrum.channels[0].type = type;
 789         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 790                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 791                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 792
 793         rc = iwl_send_cmd_sync(priv, &cmd);
 794         if (rc)
 795                 return rc;
 796
 797         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 798         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 799                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 800                 rc = -EIO;
 801         }
 802
 803         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
 804         switch (spectrum_resp_status) {
 805         case 0:         /* Command will be handled */
 806                 if (res->u.spectrum.id != 0xff) {
 807                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 808                                                 res->u.spectrum.id);
 809                         priv->measurement_status &= ~MEASUREMENT_READY;
 810                 }
 811                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 812                 rc = 0;
 813                 break;
 814
 815         case 1:         /* Command will not be handled */
 816                 rc = -EAGAIN;
 817                 break;
 818         }
 819
 820         dev_kfree_skb_any(cmd.meta.u.skb);
 821
 822         return rc;
 823 }
 824 #endif
 825
 826 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 827                                struct iwl_rx_mem_buffer *rxb)
 828 {
 829         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 830         struct iwl_alive_resp *palive;
 831         struct delayed_work *pwork;
 832
 833         palive = &pkt->u.alive_frame;
 834
 835         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 836                        "0x%01X 0x%01X\n",
 837                        palive->is_valid, palive->ver_type,
 838                        palive->ver_subtype);
 839
 840         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 841                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 842                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 843                        sizeof(struct iwl_alive_resp));
 844                 pwork = &priv->init_alive_start;
 845         } else {
 846                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 847                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 848                        sizeof(struct iwl_alive_resp));
 849                 pwork = &priv->alive_start;
 850                 iwl3945_disable_events(priv);
 851         }
 852
 853         /* We delay the ALIVE response by 5ms to
 854          * give the HW RF Kill time to activate... */
 855         if (palive->is_valid == UCODE_VALID_OK)
 856                 queue_delayed_work(priv->workqueue, pwork,
 857                                    msecs_to_jiffies(5));
 858         else
 859                 IWL_WARN(priv, "uCode did not respond OK.\n");
 860 }
 861
 862 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 863                                  struct iwl_rx_mem_buffer *rxb)
 864 {
 865 #ifdef CONFIG_IWLWIFI_DEBUG
 866         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 867 #endif
 868
 869         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 870         return;
 871 }
 872
 873 static void iwl3945_bg_beacon_update(struct work_struct *work)
 874 {
 875         struct iwl_priv *priv =
 876                 container_of(work, struct iwl_priv, beacon_update);
 877         struct sk_buff *beacon;
 878
 879         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 880         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 881
 882         if (!beacon) {
 883                 IWL_ERR(priv, "update beacon failed\n");
 884                 return;
 885         }
 886
 887         mutex_lock(&priv->mutex);
 888         /* new beacon skb is allocated every time; dispose previous.*/
 889         if (priv->ibss_beacon)
 890                 dev_kfree_skb(priv->ibss_beacon);
 891
 892         priv->ibss_beacon = beacon;
 893         mutex_unlock(&priv->mutex);
 894
 895         iwl3945_send_beacon_cmd(priv);
 896 }
 897
 898 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 899                                 struct iwl_rx_mem_buffer *rxb)
 900 {
 901 #ifdef CONFIG_IWLWIFI_DEBUG
 902         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 903         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 904         u8 rate = beacon->beacon_notify_hdr.rate;
 905
 906         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 907                 "tsf %d %d rate %d\n",
 908                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 909                 beacon->beacon_notify_hdr.failure_frame,
 910                 le32_to_cpu(beacon->ibss_mgr_status),
 911                 le32_to_cpu(beacon->high_tsf),
 912                 le32_to_cpu(beacon->low_tsf), rate);
 913 #endif
 914
 915         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 916             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 917                 queue_work(priv->workqueue, &priv->beacon_update);
 918 }
 919
 920 /* Handle notification from uCode that card's power state is changing
 921  * due to software, hardware, or critical temperature RFKILL */
 922 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 923                                     struct iwl_rx_mem_buffer *rxb)
 924 {
 925         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 926         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 927         unsigned long status = priv->status;
 928
 929         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 930                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 931                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 932
 933         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 934                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 935
 936         if (flags & HW_CARD_DISABLED)
 937                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 938         else
 939                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 940
 941
 942         iwl_scan_cancel(priv);
 943
 944         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 945              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 946                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 947                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 948         else
 949                 wake_up_interruptible(&priv->wait_command_queue);
 950 }
 951
 952 /**
 953  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 954  *
 955  * Setup the RX handlers for each of the reply types sent from the uCode
 956  * to the host.
 957  *
 958  * This function chains into the hardware specific files for them to setup
 959  * any hardware specific handlers as well.
 960  */
 961 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 962 {
 963         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 964         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 965         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 966         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 967         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 968         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 969             iwl_rx_pm_debug_statistics_notif;
 970         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 971
 972         /*
 973          * The same handler is used for both the REPLY to a discrete
 974          * statistics request from the host as well as for the periodic
 975          * statistics notifications (after received beacons) from the uCode.
 976          */
 977         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 978         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 979
 980         iwl_setup_spectrum_handlers(priv);
 981         iwl_setup_rx_scan_handlers(priv);
 982         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 983
 984         /* Set up hardware specific Rx handlers */
 985         iwl3945_hw_rx_handler_setup(priv);
 986 }
 987
 988 /************************** RX-FUNCTIONS ****************************/
 989 /*
 990  * Rx theory of operation
 991  *
 992  * The host allocates 32 DMA target addresses and passes the host address
 993  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 994  * 0 to 31
 995  *
 996  * Rx Queue Indexes
 997  * The host/firmware share two index registers for managing the Rx buffers.
 998  *
 999  * The READ index maps to the first position that the firmware may be writing
1000  * to -- the driver can read up to (but not including) this position and get
1001  * good data.
1002  * The READ index is managed by the firmware once the card is enabled.
1003  *
1004  * The WRITE index maps to the last position the driver has read from -- the
1005  * position preceding WRITE is the last slot the firmware can place a packet.
1006  *
1007  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1008  * WRITE = READ.
1009  *
1010  * During initialization, the host sets up the READ queue position to the first
1011  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1012  *
1013  * When the firmware places a packet in a buffer, it will advance the READ index
1014  * and fire the RX interrupt.  The driver can then query the READ index and
1015  * process as many packets as possible, moving the WRITE index forward as it
1016  * resets the Rx queue buffers with new memory.
1017  *
1018  * The management in the driver is as follows:
1019  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1020  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1021  *   to replenish the iwl->rxq->rx_free.
1022  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1023  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1024  *   'processed' and 'read' driver indexes as well)
1025  * + A received packet is processed and handed to the kernel network stack,
1026  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1027  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1028  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1029  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1030  *   were enough free buffers and RX_STALLED is set it is cleared.
1031  *
1032  *
1033  * Driver sequence:
1034  *
1035  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1036  *                            iwl3945_rx_queue_restock
1037  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1038  *                            queue, updates firmware pointers, and updates
1039  *                            the WRITE index.  If insufficient rx_free buffers
1040  *                            are available, schedules iwl3945_rx_replenish
1041  *
1042  * -- enable interrupts --
1043  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1044  *                            READ INDEX, detaching the SKB from the pool.
1045  *                            Moves the packet buffer from queue to rx_used.
1046  *                            Calls iwl3945_rx_queue_restock to refill any empty
1047  *                            slots.
1048  * ...
1049  *
1050  */
1051
1052 /**
1053  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1054  */
1055 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1056                                           dma_addr_t dma_addr)
1057 {
1058         return cpu_to_le32((u32)dma_addr);
1059 }
1060
1061 /**
1062  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1063  *
1064  * If there are slots in the RX queue that need to be restocked,
1065  * and we have free pre-allocated buffers, fill the ranks as much
1066  * as we can, pulling from rx_free.
1067  *
1068  * This moves the 'write' index forward to catch up with 'processed', and
1069  * also updates the memory address in the firmware to reference the new
1070  * target buffer.
1071  */
1072 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1073 {
1074         struct iwl_rx_queue *rxq = &priv->rxq;
1075         struct list_head *element;
1076         struct iwl_rx_mem_buffer *rxb;
1077         unsigned long flags;
1078         int write, rc;
1079
1080         spin_lock_irqsave(&rxq->lock, flags);
1081         write = rxq->write & ~0x7;
1082         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1083                 /* Get next free Rx buffer, remove from free list */
1084                 element = rxq->rx_free.next;
1085                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1086                 list_del(element);
1087
1088                 /* Point to Rx buffer via next RBD in circular buffer */
1089                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1090                 rxq->queue[rxq->write] = rxb;
1091                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1092                 rxq->free_count--;
1093         }
1094         spin_unlock_irqrestore(&rxq->lock, flags);
1095         /* If the pre-allocated buffer pool is dropping low, schedule to
1096          * refill it */
1097         if (rxq->free_count <= RX_LOW_WATERMARK)
1098                 queue_work(priv->workqueue, &priv->rx_replenish);
1099
1100
1101         /* If we've added more space for the firmware to place data, tell it.
1102          * Increment device's write pointer in multiples of 8. */
1103         if ((rxq->write_actual != (rxq->write & ~0x7))
1104             || (abs(rxq->write - rxq->read) > 7)) {
1105                 spin_lock_irqsave(&rxq->lock, flags);
1106                 rxq->need_update = 1;
1107                 spin_unlock_irqrestore(&rxq->lock, flags);
1108                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1109                 if (rc)
1110                         return rc;
1111         }
1112
1113         return 0;
1114 }
1115
1116 /**
1117  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1118  *
1119  * When moving to rx_free an SKB is allocated for the slot.
1120  *
1121  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1122  * This is called as a scheduled work item (except for during initialization)
1123  */
1124 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1125 {
1126         struct iwl_rx_queue *rxq = &priv->rxq;
1127         struct list_head *element;
1128         struct iwl_rx_mem_buffer *rxb;
1129         unsigned long flags;
1130
1131         while (1) {
1132                 spin_lock_irqsave(&rxq->lock, flags);
1133
1134                 if (list_empty(&rxq->rx_used)) {
1135                         spin_unlock_irqrestore(&rxq->lock, flags);
1136                         return;
1137                 }
1138
1139                 element = rxq->rx_used.next;
1140                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1141                 list_del(element);
1142                 spin_unlock_irqrestore(&rxq->lock, flags);
1143
1144                 /* Alloc a new receive buffer */
1145                 rxb->skb =
1146                     alloc_skb(priv->hw_params.rx_buf_size,
1147                                 priority);
1148                 if (!rxb->skb) {
1149                         if (net_ratelimit())
1150                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1151                         /* We don't reschedule replenish work here -- we will
1152                          * call the restock method and if it still needs
1153                          * more buffers it will schedule replenish */
1154                         break;
1155                 }
1156
1157                 /* If radiotap head is required, reserve some headroom here.
1158                  * The physical head count is a variable rx_stats->phy_count.
1159                  * We reserve 4 bytes here. Plus these extra bytes, the
1160                  * headroom of the physical head should be enough for the
1161                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1162                  */
1163                 skb_reserve(rxb->skb, 4);
1164
1165                 /* Get physical address of RB/SKB */
1166                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1167                                                 rxb->skb->data,
1168                                                 priv->hw_params.rx_buf_size,
1169                                                 PCI_DMA_FROMDEVICE);
1170
1171                 spin_lock_irqsave(&rxq->lock, flags);
1172                 list_add_tail(&rxb->list, &rxq->rx_free);
1173                 priv->alloc_rxb_skb++;
1174                 rxq->free_count++;
1175                 spin_unlock_irqrestore(&rxq->lock, flags);
1176         }
1177 }
1178
1179 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1180 {
1181         unsigned long flags;
1182         int i;
1183         spin_lock_irqsave(&rxq->lock, flags);
1184         INIT_LIST_HEAD(&rxq->rx_free);
1185         INIT_LIST_HEAD(&rxq->rx_used);
1186         /* Fill the rx_used queue with _all_ of the Rx buffers */
1187         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1188                 /* In the reset function, these buffers may have been allocated
1189                  * to an SKB, so we need to unmap and free potential storage */
1190                 if (rxq->pool[i].skb != NULL) {
1191                         pci_unmap_single(priv->pci_dev,
1192                                          rxq->pool[i].real_dma_addr,
1193                                          priv->hw_params.rx_buf_size,
1194                                          PCI_DMA_FROMDEVICE);
1195                         priv->alloc_rxb_skb--;
1196                         dev_kfree_skb(rxq->pool[i].skb);
1197                         rxq->pool[i].skb = NULL;
1198                 }
1199                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1200         }
1201
1202         /* Set us so that we have processed and used all buffers, but have
1203          * not restocked the Rx queue with fresh buffers */
1204         rxq->read = rxq->write = 0;
1205         rxq->free_count = 0;
1206         rxq->write_actual = 0;
1207         spin_unlock_irqrestore(&rxq->lock, flags);
1208 }
1209
1210 void iwl3945_rx_replenish(void *data)
1211 {
1212         struct iwl_priv *priv = data;
1213         unsigned long flags;
1214
1215         iwl3945_rx_allocate(priv, GFP_KERNEL);
1216
1217         spin_lock_irqsave(&priv->lock, flags);
1218         iwl3945_rx_queue_restock(priv);
1219         spin_unlock_irqrestore(&priv->lock, flags);
1220 }
1221
1222 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1223 {
1224         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1225
1226         iwl3945_rx_queue_restock(priv);
1227 }
1228
1229
1230 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1231  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1232  * This free routine walks the list of POOL entries and if SKB is set to
1233  * non NULL it is unmapped and freed
1234  */
1235 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1236 {
1237         int i;
1238         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1239                 if (rxq->pool[i].skb != NULL) {
1240                         pci_unmap_single(priv->pci_dev,
1241                                          rxq->pool[i].real_dma_addr,
1242                                          priv->hw_params.rx_buf_size,
1243                                          PCI_DMA_FROMDEVICE);
1244                         dev_kfree_skb(rxq->pool[i].skb);
1245                 }
1246         }
1247
1248         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1249                             rxq->dma_addr);
1250         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1251                             rxq->rb_stts, rxq->rb_stts_dma);
1252         rxq->bd = NULL;
1253         rxq->rb_stts  = NULL;
1254 }
1255
1256
1257 /* Convert linear signal-to-noise ratio into dB */
1258 static u8 ratio2dB[100] = {
1259 /*       0   1   2   3   4   5   6   7   8   9 */
1260          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1261         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1262         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1263         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1264         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1265         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1266         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1267         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1268         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1269         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1270 };
1271
1272 /* Calculates a relative dB value from a ratio of linear
1273  *   (i.e. not dB) signal levels.
1274  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1275 int iwl3945_calc_db_from_ratio(int sig_ratio)
1276 {
1277         /* 1000:1 or higher just report as 60 dB */
1278         if (sig_ratio >= 1000)
1279                 return 60;
1280
1281         /* 100:1 or higher, divide by 10 and use table,
1282          *   add 20 dB to make up for divide by 10 */
1283         if (sig_ratio >= 100)
1284                 return 20 + (int)ratio2dB[sig_ratio/10];
1285
1286         /* We shouldn't see this */
1287         if (sig_ratio < 1)
1288                 return 0;
1289
1290         /* Use table for ratios 1:1 - 99:1 */
1291         return (int)ratio2dB[sig_ratio];
1292 }
1293
1294 #define PERFECT_RSSI (-20) /* dBm */
1295 #define WORST_RSSI (-95)   /* dBm */
1296 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1297
1298 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1299  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1300  *   about formulas used below. */
1301 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1302 {
1303         int sig_qual;
1304         int degradation = PERFECT_RSSI - rssi_dbm;
1305
1306         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1307          * as indicator; formula is (signal dbm - noise dbm).
1308          * SNR at or above 40 is a great signal (100%).
1309          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1310          * Weakest usable signal is usually 10 - 15 dB SNR. */
1311         if (noise_dbm) {
1312                 if (rssi_dbm - noise_dbm >= 40)
1313                         return 100;
1314                 else if (rssi_dbm < noise_dbm)
1315                         return 0;
1316                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1317
1318         /* Else use just the signal level.
1319          * This formula is a least squares fit of data points collected and
1320          *   compared with a reference system that had a percentage (%) display
1321          *   for signal quality. */
1322         } else
1323                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1324                             (15 * RSSI_RANGE + 62 * degradation)) /
1325                            (RSSI_RANGE * RSSI_RANGE);
1326
1327         if (sig_qual > 100)
1328                 sig_qual = 100;
1329         else if (sig_qual < 1)
1330                 sig_qual = 0;
1331
1332         return sig_qual;
1333 }
1334
1335 /**
1336  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1337  *
1338  * Uses the priv->rx_handlers callback function array to invoke
1339  * the appropriate handlers, including command responses,
1340  * frame-received notifications, and other notifications.
1341  */
1342 static void iwl3945_rx_handle(struct iwl_priv *priv)
1343 {
1344         struct iwl_rx_mem_buffer *rxb;
1345         struct iwl_rx_packet *pkt;
1346         struct iwl_rx_queue *rxq = &priv->rxq;
1347         u32 r, i;
1348         int reclaim;
1349         unsigned long flags;
1350         u8 fill_rx = 0;
1351         u32 count = 8;
1352         int total_empty = 0;
1353
1354         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1355          * buffer that the driver may process (last buffer filled by ucode). */
1356         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1357         i = rxq->read;
1358
1359         /* calculate total frames need to be restock after handling RX */
1360         total_empty = r - priv->rxq.write_actual;
1361         if (total_empty < 0)
1362                 total_empty += RX_QUEUE_SIZE;
1363
1364         if (total_empty > (RX_QUEUE_SIZE / 2))
1365                 fill_rx = 1;
1366         /* Rx interrupt, but nothing sent from uCode */
1367         if (i == r)
1368                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1369
1370         while (i != r) {
1371                 rxb = rxq->queue[i];
1372
1373                 /* If an RXB doesn't have a Rx queue slot associated with it,
1374                  * then a bug has been introduced in the queue refilling
1375                  * routines -- catch it here */
1376                 BUG_ON(rxb == NULL);
1377
1378                 rxq->queue[i] = NULL;
1379
1380                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1381                                 priv->hw_params.rx_buf_size,
1382                                 PCI_DMA_FROMDEVICE);
1383                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1384
1385                 /* Reclaim a command buffer only if this packet is a response
1386                  *   to a (driver-originated) command.
1387                  * If the packet (e.g. Rx frame) originated from uCode,
1388                  *   there is no command buffer to reclaim.
1389                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1390                  *   but apparently a few don't get set; catch them here. */
1391                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1392                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1393                         (pkt->hdr.cmd != REPLY_TX);
1394
1395                 /* Based on type of command response or notification,
1396                  *   handle those that need handling via function in
1397                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1398                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1399                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1400                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1401                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1402                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1403                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1404                 } else {
1405                         /* No handling needed */
1406                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1407                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1408                                 r, i, get_cmd_string(pkt->hdr.cmd),
1409                                 pkt->hdr.cmd);
1410                 }
1411
1412                 if (reclaim) {
1413                         /* Invoke any callbacks, transfer the skb to caller, and
1414                          * fire off the (possibly) blocking iwl_send_cmd()
1415                          * as we reclaim the driver command queue */
1416                         if (rxb && rxb->skb)
1417                                 iwl_tx_cmd_complete(priv, rxb);
1418                         else
1419                                 IWL_WARN(priv, "Claim null rxb?\n");
1420                 }
1421
1422                 /* For now we just don't re-use anything.  We can tweak this
1423                  * later to try and re-use notification packets and SKBs that
1424                  * fail to Rx correctly */
1425                 if (rxb->skb != NULL) {
1426                         priv->alloc_rxb_skb--;
1427                         dev_kfree_skb_any(rxb->skb);
1428                         rxb->skb = NULL;
1429                 }
1430
1431                 spin_lock_irqsave(&rxq->lock, flags);
1432                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1433                 spin_unlock_irqrestore(&rxq->lock, flags);
1434                 i = (i + 1) & RX_QUEUE_MASK;
1435                 /* If there are a lot of unused frames,
1436                  * restock the Rx queue so ucode won't assert. */
1437                 if (fill_rx) {
1438                         count++;
1439                         if (count >= 8) {
1440                                 priv->rxq.read = i;
1441                                 iwl3945_rx_replenish_now(priv);
1442                                 count = 0;
1443                         }
1444                 }
1445         }
1446
1447         /* Backtrack one entry */
1448         priv->rxq.read = i;
1449         if (fill_rx)
1450                 iwl3945_rx_replenish_now(priv);
1451         else
1452                 iwl3945_rx_queue_restock(priv);
1453 }
1454
1455 /* call this function to flush any scheduled tasklet */
1456 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1457 {
1458         /* wait to make sure we flush pending tasklet*/
1459         synchronize_irq(priv->pci_dev->irq);
1460         tasklet_kill(&priv->irq_tasklet);
1461 }
1462
1463 static const char *desc_lookup(int i)
1464 {
1465         switch (i) {
1466         case 1:
1467                 return "FAIL";
1468         case 2:
1469                 return "BAD_PARAM";
1470         case 3:
1471                 return "BAD_CHECKSUM";
1472         case 4:
1473                 return "NMI_INTERRUPT";
1474         case 5:
1475                 return "SYSASSERT";
1476         case 6:
1477                 return "FATAL_ERROR";
1478         }
1479
1480         return "UNKNOWN";
1481 }
1482
1483 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1484 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1485
1486 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1487 {
1488         u32 i;
1489         u32 desc, time, count, base, data1;
1490         u32 blink1, blink2, ilink1, ilink2;
1491
1492         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1493
1494         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1495                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1496                 return;
1497         }
1498
1499
1500         count = iwl_read_targ_mem(priv, base);
1501
1502         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1503                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1504                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1505                         priv->status, count);
1506         }
1507
1508         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1509                   "ilink1  nmiPC   Line\n");
1510         for (i = ERROR_START_OFFSET;
1511              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1512              i += ERROR_ELEM_SIZE) {
1513                 desc = iwl_read_targ_mem(priv, base + i);
1514                 time =
1515                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1516                 blink1 =
1517                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1518                 blink2 =
1519                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1520                 ilink1 =
1521                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1522                 ilink2 =
1523                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1524                 data1 =
1525                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1526
1527                 IWL_ERR(priv,
1528                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1529                         desc_lookup(desc), desc, time, blink1, blink2,
1530                         ilink1, ilink2, data1);
1531         }
1532
1533 }
1534
1535 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1536
1537 /**
1538  * iwl3945_print_event_log - Dump error event log to syslog
1539  *
1540  */
1541 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1542                                 u32 num_events, u32 mode)
1543 {
1544         u32 i;
1545         u32 base;       /* SRAM byte address of event log header */
1546         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1547         u32 ptr;        /* SRAM byte address of log data */
1548         u32 ev, time, data; /* event log data */
1549
1550         if (num_events == 0)
1551                 return;
1552
1553         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1554
1555         if (mode == 0)
1556                 event_size = 2 * sizeof(u32);
1557         else
1558                 event_size = 3 * sizeof(u32);
1559
1560         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1561
1562         /* "time" is actually "data" for mode 0 (no timestamp).
1563          * place event id # at far right for easier visual parsing. */
1564         for (i = 0; i < num_events; i++) {
1565                 ev = iwl_read_targ_mem(priv, ptr);
1566                 ptr += sizeof(u32);
1567                 time = iwl_read_targ_mem(priv, ptr);
1568                 ptr += sizeof(u32);
1569                 if (mode == 0) {
1570                         /* data, ev */
1571                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1572                 } else {
1573                         data = iwl_read_targ_mem(priv, ptr);
1574                         ptr += sizeof(u32);
1575                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1576                 }
1577         }
1578 }
1579
1580 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1581 {
1582         u32 base;       /* SRAM byte address of event log header */
1583         u32 capacity;   /* event log capacity in # entries */
1584         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1585         u32 num_wraps;  /* # times uCode wrapped to top of log */
1586         u32 next_entry; /* index of next entry to be written by uCode */
1587         u32 size;       /* # entries that we'll print */
1588
1589         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1590         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1591                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1592                 return;
1593         }
1594
1595         /* event log header */
1596         capacity = iwl_read_targ_mem(priv, base);
1597         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1598         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1599         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1600
1601         size = num_wraps ? capacity : next_entry;
1602
1603         /* bail out if nothing in log */
1604         if (size == 0) {
1605                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1606                 return;
1607         }
1608
1609         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1610                   size, num_wraps);
1611
1612         /* if uCode has wrapped back to top of log, start at the oldest entry,
1613          * i.e the next one that uCode would fill. */
1614         if (num_wraps)
1615                 iwl3945_print_event_log(priv, next_entry,
1616                                     capacity - next_entry, mode);
1617
1618         /* (then/else) start at top of log */
1619         iwl3945_print_event_log(priv, 0, next_entry, mode);
1620
1621 }
1622
1623 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1624 {
1625         u32 inta, handled = 0;
1626         u32 inta_fh;
1627         unsigned long flags;
1628 #ifdef CONFIG_IWLWIFI_DEBUG
1629         u32 inta_mask;
1630 #endif
1631
1632         spin_lock_irqsave(&priv->lock, flags);
1633
1634         /* Ack/clear/reset pending uCode interrupts.
1635          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1636          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1637         inta = iwl_read32(priv, CSR_INT);
1638         iwl_write32(priv, CSR_INT, inta);
1639
1640         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1641          * Any new interrupts that happen after this, either while we're
1642          * in this tasklet, or later, will show up in next ISR/tasklet. */
1643         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1644         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1645
1646 #ifdef CONFIG_IWLWIFI_DEBUG
1647         if (priv->debug_level & IWL_DL_ISR) {
1648                 /* just for debug */
1649                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1650                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1651                               inta, inta_mask, inta_fh);
1652         }
1653 #endif
1654
1655         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1656          * atomic, make sure that inta covers all the interrupts that
1657          * we've discovered, even if FH interrupt came in just after
1658          * reading CSR_INT. */
1659         if (inta_fh & CSR39_FH_INT_RX_MASK)
1660                 inta |= CSR_INT_BIT_FH_RX;
1661         if (inta_fh & CSR39_FH_INT_TX_MASK)
1662                 inta |= CSR_INT_BIT_FH_TX;
1663
1664         /* Now service all interrupt bits discovered above. */
1665         if (inta & CSR_INT_BIT_HW_ERR) {
1666                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1667
1668                 /* Tell the device to stop sending interrupts */
1669                 iwl_disable_interrupts(priv);
1670
1671                 priv->isr_stats.hw++;
1672                 iwl_irq_handle_error(priv);
1673
1674                 handled |= CSR_INT_BIT_HW_ERR;
1675
1676                 spin_unlock_irqrestore(&priv->lock, flags);
1677
1678                 return;
1679         }
1680
1681 #ifdef CONFIG_IWLWIFI_DEBUG
1682         if (priv->debug_level & (IWL_DL_ISR)) {
1683                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1684                 if (inta & CSR_INT_BIT_SCD) {
1685                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1686                                       "the frame/frames.\n");
1687                         priv->isr_stats.sch++;
1688                 }
1689
1690                 /* Alive notification via Rx interrupt will do the real work */
1691                 if (inta & CSR_INT_BIT_ALIVE) {
1692                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1693                         priv->isr_stats.alive++;
1694                 }
1695         }
1696 #endif
1697         /* Safely ignore these bits for debug checks below */
1698         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1699
1700         /* Error detected by uCode */
1701         if (inta & CSR_INT_BIT_SW_ERR) {
1702                 IWL_ERR(priv, "Microcode SW error detected. "
1703                         "Restarting 0x%X.\n", inta);
1704                 priv->isr_stats.sw++;
1705                 priv->isr_stats.sw_err = inta;
1706                 iwl_irq_handle_error(priv);
1707                 handled |= CSR_INT_BIT_SW_ERR;
1708         }
1709
1710         /* uCode wakes up after power-down sleep */
1711         if (inta & CSR_INT_BIT_WAKEUP) {
1712                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1713                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1714                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1715                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1716                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1717                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1718                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1719                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1720
1721                 priv->isr_stats.wakeup++;
1722                 handled |= CSR_INT_BIT_WAKEUP;
1723         }
1724
1725         /* All uCode command responses, including Tx command responses,
1726          * Rx "responses" (frame-received notification), and other
1727          * notifications from uCode come through here*/
1728         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1729                 iwl3945_rx_handle(priv);
1730                 priv->isr_stats.rx++;
1731                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1732         }
1733
1734         if (inta & CSR_INT_BIT_FH_TX) {
1735                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1736                 priv->isr_stats.tx++;
1737
1738                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1739                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1740                                         (FH39_SRVC_CHNL), 0x0);
1741                 handled |= CSR_INT_BIT_FH_TX;
1742         }
1743
1744         if (inta & ~handled) {
1745                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1746                 priv->isr_stats.unhandled++;
1747         }
1748
1749         if (inta & ~priv->inta_mask) {
1750                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1751                          inta & ~priv->inta_mask);
1752                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1753         }
1754
1755         /* Re-enable all interrupts */
1756         /* only Re-enable if disabled by irq */
1757         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1758                 iwl_enable_interrupts(priv);
1759
1760 #ifdef CONFIG_IWLWIFI_DEBUG
1761         if (priv->debug_level & (IWL_DL_ISR)) {
1762                 inta = iwl_read32(priv, CSR_INT);
1763                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1764                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1765                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1766                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1767         }
1768 #endif
1769         spin_unlock_irqrestore(&priv->lock, flags);
1770 }
1771
1772 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1773                                          enum ieee80211_band band,
1774                                      u8 is_active, u8 n_probes,
1775                                      struct iwl3945_scan_channel *scan_ch)
1776 {
1777         struct ieee80211_channel *chan;
1778         const struct ieee80211_supported_band *sband;
1779         const struct iwl_channel_info *ch_info;
1780         u16 passive_dwell = 0;
1781         u16 active_dwell = 0;
1782         int added, i;
1783
1784         sband = iwl_get_hw_mode(priv, band);
1785         if (!sband)
1786                 return 0;
1787
1788         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1789         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1790
1791         if (passive_dwell <= active_dwell)
1792                 passive_dwell = active_dwell + 1;
1793
1794         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1795                 chan = priv->scan_request->channels[i];
1796
1797                 if (chan->band != band)
1798                         continue;
1799
1800                 scan_ch->channel = chan->hw_value;
1801
1802                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1803                 if (!is_channel_valid(ch_info)) {
1804                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1805                                        scan_ch->channel);
1806                         continue;
1807                 }
1808
1809                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1810                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1811                 /* If passive , set up for auto-switch
1812                  *  and use long active_dwell time.
1813                  */
1814                 if (!is_active || is_channel_passive(ch_info) ||
1815                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1816                         scan_ch->type = 0;      /* passive */
1817                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1818                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1819                 } else {
1820                         scan_ch->type = 1;      /* active */
1821                 }
1822
1823                 /* Set direct probe bits. These may be used both for active
1824                  * scan channels (probes gets sent right away),
1825                  * or for passive channels (probes get se sent only after
1826                  * hearing clear Rx packet).*/
1827                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1828                         if (n_probes)
1829                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1830                 } else {
1831                         /* uCode v1 does not allow setting direct probe bits on
1832                          * passive channel. */
1833                         if ((scan_ch->type & 1) && n_probes)
1834                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1835                 }
1836
1837                 /* Set txpower levels to defaults */
1838                 scan_ch->tpc.dsp_atten = 110;
1839                 /* scan_pwr_info->tpc.dsp_atten; */
1840
1841                 /*scan_pwr_info->tpc.tx_gain; */
1842                 if (band == IEEE80211_BAND_5GHZ)
1843                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1844                 else {
1845                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1846                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1847                          * power level:
1848                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1849                          */
1850                 }
1851
1852                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1853                                scan_ch->channel,
1854                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1855                                (scan_ch->type & 1) ?
1856                                active_dwell : passive_dwell);
1857
1858                 scan_ch++;
1859                 added++;
1860         }
1861
1862         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1863         return added;
1864 }
1865
1866 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1867                               struct ieee80211_rate *rates)
1868 {
1869         int i;
1870
1871         for (i = 0; i < IWL_RATE_COUNT; i++) {
1872                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1873                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1874                 rates[i].hw_value_short = i;
1875                 rates[i].flags = 0;
1876                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1877                         /*
1878                          * If CCK != 1M then set short preamble rate flag.
1879                          */
1880                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1881                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1882                 }
1883         }
1884 }
1885
1886 /******************************************************************************
1887  *
1888  * uCode download functions
1889  *
1890  ******************************************************************************/
1891
1892 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1893 {
1894         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1895         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1896         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1897         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1898         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1899         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1900 }
1901
1902 /**
1903  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1904  *     looking at all data.
1905  */
1906 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1907 {
1908         u32 val;
1909         u32 save_len = len;
1910         int rc = 0;
1911         u32 errcnt;
1912
1913         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1914
1915         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1916                                IWL39_RTC_INST_LOWER_BOUND);
1917
1918         errcnt = 0;
1919         for (; len > 0; len -= sizeof(u32), image++) {
1920                 /* read data comes through single port, auto-incr addr */
1921                 /* NOTE: Use the debugless read so we don't flood kernel log
1922                  * if IWL_DL_IO is set */
1923                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1924                 if (val != le32_to_cpu(*image)) {
1925                         IWL_ERR(priv, "uCode INST section is invalid at "
1926                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1927                                   save_len - len, val, le32_to_cpu(*image));
1928                         rc = -EIO;
1929                         errcnt++;
1930                         if (errcnt >= 20)
1931                                 break;
1932                 }
1933         }
1934
1935
1936         if (!errcnt)
1937                 IWL_DEBUG_INFO(priv,
1938                         "ucode image in INSTRUCTION memory is good\n");
1939
1940         return rc;
1941 }
1942
1943
1944 /**
1945  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1946  *   using sample data 100 bytes apart.  If these sample points are good,
1947  *   it's a pretty good bet that everything between them is good, too.
1948  */
1949 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1950 {
1951         u32 val;
1952         int rc = 0;
1953         u32 errcnt = 0;
1954         u32 i;
1955
1956         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1957
1958         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1959                 /* read data comes through single port, auto-incr addr */
1960                 /* NOTE: Use the debugless read so we don't flood kernel log
1961                  * if IWL_DL_IO is set */
1962                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1963                         i + IWL39_RTC_INST_LOWER_BOUND);
1964                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1965                 if (val != le32_to_cpu(*image)) {
1966 #if 0 /* Enable this if you want to see details */
1967                         IWL_ERR(priv, "uCode INST section is invalid at "
1968                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1969                                   i, val, *image);
1970 #endif
1971                         rc = -EIO;
1972                         errcnt++;
1973                         if (errcnt >= 3)
1974                                 break;
1975                 }
1976         }
1977
1978         return rc;
1979 }
1980
1981
1982 /**
1983  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
1984  *    and verify its contents
1985  */
1986 static int iwl3945_verify_ucode(struct iwl_priv *priv)
1987 {
1988         __le32 *image;
1989         u32 len;
1990         int rc = 0;
1991
1992         /* Try bootstrap */
1993         image = (__le32 *)priv->ucode_boot.v_addr;
1994         len = priv->ucode_boot.len;
1995         rc = iwl3945_verify_inst_sparse(priv, image, len);
1996         if (rc == 0) {
1997                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1998                 return 0;
1999         }
2000
2001         /* Try initialize */
2002         image = (__le32 *)priv->ucode_init.v_addr;
2003         len = priv->ucode_init.len;
2004         rc = iwl3945_verify_inst_sparse(priv, image, len);
2005         if (rc == 0) {
2006                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2007                 return 0;
2008         }
2009
2010         /* Try runtime/protocol */
2011         image = (__le32 *)priv->ucode_code.v_addr;
2012         len = priv->ucode_code.len;
2013         rc = iwl3945_verify_inst_sparse(priv, image, len);
2014         if (rc == 0) {
2015                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2016                 return 0;
2017         }
2018
2019         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2020
2021         /* Since nothing seems to match, show first several data entries in
2022          * instruction SRAM, so maybe visual inspection will give a clue.
2023          * Selection of bootstrap image (vs. other images) is arbitrary. */
2024         image = (__le32 *)priv->ucode_boot.v_addr;
2025         len = priv->ucode_boot.len;
2026         rc = iwl3945_verify_inst_full(priv, image, len);
2027
2028         return rc;
2029 }
2030
2031 static void iwl3945_nic_start(struct iwl_priv *priv)
2032 {
2033         /* Remove all resets to allow NIC to operate */
2034         iwl_write32(priv, CSR_RESET, 0);
2035 }
2036
2037 /**
2038  * iwl3945_read_ucode - Read uCode images from disk file.
2039  *
2040  * Copy into buffers for card to fetch via bus-mastering
2041  */
2042 static int iwl3945_read_ucode(struct iwl_priv *priv)
2043 {
2044         struct iwl_ucode *ucode;
2045         int ret = -EINVAL, index;
2046         const struct firmware *ucode_raw;
2047         /* firmware file name contains uCode/driver compatibility version */
2048         const char *name_pre = priv->cfg->fw_name_pre;
2049         const unsigned int api_max = priv->cfg->ucode_api_max;
2050         const unsigned int api_min = priv->cfg->ucode_api_min;
2051         char buf[25];
2052         u8 *src;
2053         size_t len;
2054         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2055
2056         /* Ask kernel firmware_class module to get the boot firmware off disk.
2057          * request_firmware() is synchronous, file is in memory on return. */
2058         for (index = api_max; index >= api_min; index--) {
2059                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2060                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2061                 if (ret < 0) {
2062                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2063                                   buf, ret);
2064                         if (ret == -ENOENT)
2065                                 continue;
2066                         else
2067                                 goto error;
2068                 } else {
2069                         if (index < api_max)
2070                                 IWL_ERR(priv, "Loaded firmware %s, "
2071                                         "which is deprecated. "
2072                                         " Please use API v%u instead.\n",
2073                                           buf, api_max);
2074                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2075                                        "(%zd bytes) from disk\n",
2076                                        buf, ucode_raw->size);
2077                         break;
2078                 }
2079         }
2080
2081         if (ret < 0)
2082                 goto error;
2083
2084         /* Make sure that we got at least our header! */
2085         if (ucode_raw->size < sizeof(*ucode)) {
2086                 IWL_ERR(priv, "File size way too small!\n");
2087                 ret = -EINVAL;
2088                 goto err_release;
2089         }
2090
2091         /* Data from ucode file:  header followed by uCode images */
2092         ucode = (void *)ucode_raw->data;
2093
2094         priv->ucode_ver = le32_to_cpu(ucode->ver);
2095         api_ver = IWL_UCODE_API(priv->ucode_ver);
2096         inst_size = le32_to_cpu(ucode->inst_size);
2097         data_size = le32_to_cpu(ucode->data_size);
2098         init_size = le32_to_cpu(ucode->init_size);
2099         init_data_size = le32_to_cpu(ucode->init_data_size);
2100         boot_size = le32_to_cpu(ucode->boot_size);
2101
2102         /* api_ver should match the api version forming part of the
2103          * firmware filename ... but we don't check for that and only rely
2104          * on the API version read from firmware header from here on forward */
2105
2106         if (api_ver < api_min || api_ver > api_max) {
2107                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2108                           "Driver supports v%u, firmware is v%u.\n",
2109                           api_max, api_ver);
2110                 priv->ucode_ver = 0;
2111                 ret = -EINVAL;
2112                 goto err_release;
2113         }
2114         if (api_ver != api_max)
2115                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2116                           "got %u. New firmware can be obtained "
2117                           "from http://www.intellinuxwireless.org.\n",
2118                           api_max, api_ver);
2119
2120         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2121                 IWL_UCODE_MAJOR(priv->ucode_ver),
2122                 IWL_UCODE_MINOR(priv->ucode_ver),
2123                 IWL_UCODE_API(priv->ucode_ver),
2124                 IWL_UCODE_SERIAL(priv->ucode_ver));
2125
2126         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2127                        priv->ucode_ver);
2128         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2129                        inst_size);
2130         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2131                        data_size);
2132         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2133                        init_size);
2134         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2135                        init_data_size);
2136         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2137                        boot_size);
2138
2139
2140         /* Verify size of file vs. image size info in file's header */
2141         if (ucode_raw->size < sizeof(*ucode) +
2142                 inst_size + data_size + init_size +
2143                 init_data_size + boot_size) {
2144
2145                 IWL_DEBUG_INFO(priv, "uCode file size %zd too small\n",
2146                                ucode_raw->size);
2147                 ret = -EINVAL;
2148                 goto err_release;
2149         }
2150
2151         /* Verify that uCode images will fit in card's SRAM */
2152         if (inst_size > IWL39_MAX_INST_SIZE) {
2153                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2154                                inst_size);
2155                 ret = -EINVAL;
2156                 goto err_release;
2157         }
2158
2159         if (data_size > IWL39_MAX_DATA_SIZE) {
2160                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2161                                data_size);
2162                 ret = -EINVAL;
2163                 goto err_release;
2164         }
2165         if (init_size > IWL39_MAX_INST_SIZE) {
2166                 IWL_DEBUG_INFO(priv,
2167                                 "uCode init instr len %d too large to fit in\n",
2168                                 init_size);
2169                 ret = -EINVAL;
2170                 goto err_release;
2171         }
2172         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2173                 IWL_DEBUG_INFO(priv,
2174                                 "uCode init data len %d too large to fit in\n",
2175                                 init_data_size);
2176                 ret = -EINVAL;
2177                 goto err_release;
2178         }
2179         if (boot_size > IWL39_MAX_BSM_SIZE) {
2180                 IWL_DEBUG_INFO(priv,
2181                                 "uCode boot instr len %d too large to fit in\n",
2182                                 boot_size);
2183                 ret = -EINVAL;
2184                 goto err_release;
2185         }
2186
2187         /* Allocate ucode buffers for card's bus-master loading ... */
2188
2189         /* Runtime instructions and 2 copies of data:
2190          * 1) unmodified from disk
2191          * 2) backup cache for save/restore during power-downs */
2192         priv->ucode_code.len = inst_size;
2193         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2194
2195         priv->ucode_data.len = data_size;
2196         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2197
2198         priv->ucode_data_backup.len = data_size;
2199         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2200
2201         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2202             !priv->ucode_data_backup.v_addr)
2203                 goto err_pci_alloc;
2204
2205         /* Initialization instructions and data */
2206         if (init_size && init_data_size) {
2207                 priv->ucode_init.len = init_size;
2208                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2209
2210                 priv->ucode_init_data.len = init_data_size;
2211                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2212
2213                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2214                         goto err_pci_alloc;
2215         }
2216
2217         /* Bootstrap (instructions only, no data) */
2218         if (boot_size) {
2219                 priv->ucode_boot.len = boot_size;
2220                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2221
2222                 if (!priv->ucode_boot.v_addr)
2223                         goto err_pci_alloc;
2224         }
2225
2226         /* Copy images into buffers for card's bus-master reads ... */
2227
2228         /* Runtime instructions (first block of data in file) */
2229         src = &ucode->data[0];
2230         len = priv->ucode_code.len;
2231         IWL_DEBUG_INFO(priv,
2232                 "Copying (but not loading) uCode instr len %zd\n", len);
2233         memcpy(priv->ucode_code.v_addr, src, len);
2234         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2235                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2236
2237         /* Runtime data (2nd block)
2238          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2239         src = &ucode->data[inst_size];
2240         len = priv->ucode_data.len;
2241         IWL_DEBUG_INFO(priv,
2242                 "Copying (but not loading) uCode data len %zd\n", len);
2243         memcpy(priv->ucode_data.v_addr, src, len);
2244         memcpy(priv->ucode_data_backup.v_addr, src, len);
2245
2246         /* Initialization instructions (3rd block) */
2247         if (init_size) {
2248                 src = &ucode->data[inst_size + data_size];
2249                 len = priv->ucode_init.len;
2250                 IWL_DEBUG_INFO(priv,
2251                         "Copying (but not loading) init instr len %zd\n", len);
2252                 memcpy(priv->ucode_init.v_addr, src, len);
2253         }
2254
2255         /* Initialization data (4th block) */
2256         if (init_data_size) {
2257                 src = &ucode->data[inst_size + data_size + init_size];
2258                 len = priv->ucode_init_data.len;
2259                 IWL_DEBUG_INFO(priv,
2260                         "Copying (but not loading) init data len %zd\n", len);
2261                 memcpy(priv->ucode_init_data.v_addr, src, len);
2262         }
2263
2264         /* Bootstrap instructions (5th block) */
2265         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
2266         len = priv->ucode_boot.len;
2267         IWL_DEBUG_INFO(priv,
2268                 "Copying (but not loading) boot instr len %zd\n", len);
2269         memcpy(priv->ucode_boot.v_addr, src, len);
2270
2271         /* We have our copies now, allow OS release its copies */
2272         release_firmware(ucode_raw);
2273         return 0;
2274
2275  err_pci_alloc:
2276         IWL_ERR(priv, "failed to allocate pci memory\n");
2277         ret = -ENOMEM;
2278         iwl3945_dealloc_ucode_pci(priv);
2279
2280  err_release:
2281         release_firmware(ucode_raw);
2282
2283  error:
2284         return ret;
2285 }
2286
2287
2288 /**
2289  * iwl3945_set_ucode_ptrs - Set uCode address location
2290  *
2291  * Tell initialization uCode where to find runtime uCode.
2292  *
2293  * BSM registers initially contain pointers to initialization uCode.
2294  * We need to replace them to load runtime uCode inst and data,
2295  * and to save runtime data when powering down.
2296  */
2297 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2298 {
2299         dma_addr_t pinst;
2300         dma_addr_t pdata;
2301
2302         /* bits 31:0 for 3945 */
2303         pinst = priv->ucode_code.p_addr;
2304         pdata = priv->ucode_data_backup.p_addr;
2305
2306         /* Tell bootstrap uCode where to find image to load */
2307         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2308         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2309         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2310                                  priv->ucode_data.len);
2311
2312         /* Inst byte count must be last to set up, bit 31 signals uCode
2313          *   that all new ptr/size info is in place */
2314         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2315                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2316
2317         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2318
2319         return 0;
2320 }
2321
2322 /**
2323  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2324  *
2325  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2326  *
2327  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2328  */
2329 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2330 {
2331         /* Check alive response for "valid" sign from uCode */
2332         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2333                 /* We had an error bringing up the hardware, so take it
2334                  * all the way back down so we can try again */
2335                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2336                 goto restart;
2337         }
2338
2339         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2340          * This is a paranoid check, because we would not have gotten the
2341          * "initialize" alive if code weren't properly loaded.  */
2342         if (iwl3945_verify_ucode(priv)) {
2343                 /* Runtime instruction load was bad;
2344                  * take it all the way back down so we can try again */
2345                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2346                 goto restart;
2347         }
2348
2349         /* Send pointers to protocol/runtime uCode image ... init code will
2350          * load and launch runtime uCode, which will send us another "Alive"
2351          * notification. */
2352         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2353         if (iwl3945_set_ucode_ptrs(priv)) {
2354                 /* Runtime instruction load won't happen;
2355                  * take it all the way back down so we can try again */
2356                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2357                 goto restart;
2358         }
2359         return;
2360
2361  restart:
2362         queue_work(priv->workqueue, &priv->restart);
2363 }
2364
2365 /**
2366  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2367  *                   from protocol/runtime uCode (initialization uCode's
2368  *                   Alive gets handled by iwl3945_init_alive_start()).
2369  */
2370 static void iwl3945_alive_start(struct iwl_priv *priv)
2371 {
2372         int thermal_spin = 0;
2373         u32 rfkill;
2374
2375         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2376
2377         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2378                 /* We had an error bringing up the hardware, so take it
2379                  * all the way back down so we can try again */
2380                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2381                 goto restart;
2382         }
2383
2384         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2385          * This is a paranoid check, because we would not have gotten the
2386          * "runtime" alive if code weren't properly loaded.  */
2387         if (iwl3945_verify_ucode(priv)) {
2388                 /* Runtime instruction load was bad;
2389                  * take it all the way back down so we can try again */
2390                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2391                 goto restart;
2392         }
2393
2394         iwl_clear_stations_table(priv);
2395
2396         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2397         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2398
2399         if (rfkill & 0x1) {
2400                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2401                 /* if RFKILL is not on, then wait for thermal
2402                  * sensor in adapter to kick in */
2403                 while (iwl3945_hw_get_temperature(priv) == 0) {
2404                         thermal_spin++;
2405                         udelay(10);
2406                 }
2407
2408                 if (thermal_spin)
2409                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2410                                        thermal_spin * 10);
2411         } else
2412                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2413
2414         /* After the ALIVE response, we can send commands to 3945 uCode */
2415         set_bit(STATUS_ALIVE, &priv->status);
2416
2417         if (iwl_is_rfkill(priv))
2418                 return;
2419
2420         ieee80211_wake_queues(priv->hw);
2421
2422         priv->active_rate = priv->rates_mask;
2423         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2424
2425         iwl_power_update_mode(priv, false);
2426
2427         if (iwl_is_associated(priv)) {
2428                 struct iwl3945_rxon_cmd *active_rxon =
2429                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2430
2431                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2432                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2433         } else {
2434                 /* Initialize our rx_config data */
2435                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2436         }
2437
2438         /* Configure Bluetooth device coexistence support */
2439         iwl_send_bt_config(priv);
2440
2441         /* Configure the adapter for unassociated operation */
2442         iwlcore_commit_rxon(priv);
2443
2444         iwl3945_reg_txpower_periodic(priv);
2445
2446         iwl3945_led_register(priv);
2447
2448         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2449         set_bit(STATUS_READY, &priv->status);
2450         wake_up_interruptible(&priv->wait_command_queue);
2451
2452         /* reassociate for ADHOC mode */
2453         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2454                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2455                                                                 priv->vif);
2456                 if (beacon)
2457                         iwl_mac_beacon_update(priv->hw, beacon);
2458         }
2459
2460         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2461                 iwl_set_mode(priv, priv->iw_mode);
2462
2463         return;
2464
2465  restart:
2466         queue_work(priv->workqueue, &priv->restart);
2467 }
2468
2469 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2470
2471 static void __iwl3945_down(struct iwl_priv *priv)
2472 {
2473         unsigned long flags;
2474         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2475         struct ieee80211_conf *conf = NULL;
2476
2477         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2478
2479         conf = ieee80211_get_hw_conf(priv->hw);
2480
2481         if (!exit_pending)
2482                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2483
2484         iwl3945_led_unregister(priv);
2485         iwl_clear_stations_table(priv);
2486
2487         /* Unblock any waiting calls */
2488         wake_up_interruptible_all(&priv->wait_command_queue);
2489
2490         /* Wipe out the EXIT_PENDING status bit if we are not actually
2491          * exiting the module */
2492         if (!exit_pending)
2493                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2494
2495         /* stop and reset the on-board processor */
2496         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2497
2498         /* tell the device to stop sending interrupts */
2499         spin_lock_irqsave(&priv->lock, flags);
2500         iwl_disable_interrupts(priv);
2501         spin_unlock_irqrestore(&priv->lock, flags);
2502         iwl_synchronize_irq(priv);
2503
2504         if (priv->mac80211_registered)
2505                 ieee80211_stop_queues(priv->hw);
2506
2507         /* If we have not previously called iwl3945_init() then
2508          * clear all bits but the RF Kill bits and return */
2509         if (!iwl_is_init(priv)) {
2510                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2511                                         STATUS_RF_KILL_HW |
2512                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2513                                         STATUS_GEO_CONFIGURED |
2514                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2515                                         STATUS_EXIT_PENDING;
2516                 goto exit;
2517         }
2518
2519         /* ...otherwise clear out all the status bits but the RF Kill
2520          * bit and continue taking the NIC down. */
2521         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2522                                 STATUS_RF_KILL_HW |
2523                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2524                                 STATUS_GEO_CONFIGURED |
2525                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2526                                 STATUS_FW_ERROR |
2527                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2528                                 STATUS_EXIT_PENDING;
2529
2530         priv->cfg->ops->lib->apm_ops.reset(priv);
2531         spin_lock_irqsave(&priv->lock, flags);
2532         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2533         spin_unlock_irqrestore(&priv->lock, flags);
2534
2535         iwl3945_hw_txq_ctx_stop(priv);
2536         iwl3945_hw_rxq_stop(priv);
2537
2538         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2539                                 APMG_CLK_VAL_DMA_CLK_RQT);
2540
2541         udelay(5);
2542
2543         if (exit_pending)
2544                 priv->cfg->ops->lib->apm_ops.stop(priv);
2545         else
2546                 priv->cfg->ops->lib->apm_ops.reset(priv);
2547
2548  exit:
2549         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2550
2551         if (priv->ibss_beacon)
2552                 dev_kfree_skb(priv->ibss_beacon);
2553         priv->ibss_beacon = NULL;
2554
2555         /* clear out any free frames */
2556         iwl3945_clear_free_frames(priv);
2557 }
2558
2559 static void iwl3945_down(struct iwl_priv *priv)
2560 {
2561         mutex_lock(&priv->mutex);
2562         __iwl3945_down(priv);
2563         mutex_unlock(&priv->mutex);
2564
2565         iwl3945_cancel_deferred_work(priv);
2566 }
2567
2568 #define MAX_HW_RESTARTS 5
2569
2570 static int __iwl3945_up(struct iwl_priv *priv)
2571 {
2572         int rc, i;
2573
2574         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2575                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2576                 return -EIO;
2577         }
2578
2579         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2580                 IWL_ERR(priv, "ucode not available for device bring up\n");
2581                 return -EIO;
2582         }
2583
2584         /* If platform's RF_KILL switch is NOT set to KILL */
2585         if (iwl_read32(priv, CSR_GP_CNTRL) &
2586                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2587                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2588         else {
2589                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2590                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2591                 return -ENODEV;
2592         }
2593
2594         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2595
2596         rc = iwl3945_hw_nic_init(priv);
2597         if (rc) {
2598                 IWL_ERR(priv, "Unable to int nic\n");
2599                 return rc;
2600         }
2601
2602         /* make sure rfkill handshake bits are cleared */
2603         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2604         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2605                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2606
2607         /* clear (again), then enable host interrupts */
2608         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2609         iwl_enable_interrupts(priv);
2610
2611         /* really make sure rfkill handshake bits are cleared */
2612         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2613         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2614
2615         /* Copy original ucode data image from disk into backup cache.
2616          * This will be used to initialize the on-board processor's
2617          * data SRAM for a clean start when the runtime program first loads. */
2618         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2619                priv->ucode_data.len);
2620
2621         /* We return success when we resume from suspend and rf_kill is on. */
2622         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2623                 return 0;
2624
2625         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2626
2627                 iwl_clear_stations_table(priv);
2628
2629                 /* load bootstrap state machine,
2630                  * load bootstrap program into processor's memory,
2631                  * prepare to load the "initialize" uCode */
2632                 priv->cfg->ops->lib->load_ucode(priv);
2633
2634                 if (rc) {
2635                         IWL_ERR(priv,
2636                                 "Unable to set up bootstrap uCode: %d\n", rc);
2637                         continue;
2638                 }
2639
2640                 /* start card; "initialize" will load runtime ucode */
2641                 iwl3945_nic_start(priv);
2642
2643                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2644
2645                 return 0;
2646         }
2647
2648         set_bit(STATUS_EXIT_PENDING, &priv->status);
2649         __iwl3945_down(priv);
2650         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2651
2652         /* tried to restart and config the device for as long as our
2653          * patience could withstand */
2654         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2655         return -EIO;
2656 }
2657
2658
2659 /*****************************************************************************
2660  *
2661  * Workqueue callbacks
2662  *
2663  *****************************************************************************/
2664
2665 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2666 {
2667         struct iwl_priv *priv =
2668             container_of(data, struct iwl_priv, init_alive_start.work);
2669
2670         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2671                 return;
2672
2673         mutex_lock(&priv->mutex);
2674         iwl3945_init_alive_start(priv);
2675         mutex_unlock(&priv->mutex);
2676 }
2677
2678 static void iwl3945_bg_alive_start(struct work_struct *data)
2679 {
2680         struct iwl_priv *priv =
2681             container_of(data, struct iwl_priv, alive_start.work);
2682
2683         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2684                 return;
2685
2686         mutex_lock(&priv->mutex);
2687         iwl3945_alive_start(priv);
2688         mutex_unlock(&priv->mutex);
2689 }
2690
2691 static void iwl3945_rfkill_poll(struct work_struct *data)
2692 {
2693         struct iwl_priv *priv =
2694             container_of(data, struct iwl_priv, rfkill_poll.work);
2695
2696         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2697                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2698         else
2699                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2700
2701         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2702                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2703
2704         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2705                            round_jiffies_relative(2 * HZ));
2706
2707 }
2708
2709 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2710 static void iwl3945_bg_request_scan(struct work_struct *data)
2711 {
2712         struct iwl_priv *priv =
2713             container_of(data, struct iwl_priv, request_scan);
2714         struct iwl_host_cmd cmd = {
2715                 .id = REPLY_SCAN_CMD,
2716                 .len = sizeof(struct iwl3945_scan_cmd),
2717                 .meta.flags = CMD_SIZE_HUGE,
2718         };
2719         int rc = 0;
2720         struct iwl3945_scan_cmd *scan;
2721         struct ieee80211_conf *conf = NULL;
2722         u8 n_probes = 0;
2723         enum ieee80211_band band;
2724         bool is_active = false;
2725
2726         conf = ieee80211_get_hw_conf(priv->hw);
2727
2728         mutex_lock(&priv->mutex);
2729
2730         cancel_delayed_work(&priv->scan_check);
2731
2732         if (!iwl_is_ready(priv)) {
2733                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2734                 goto done;
2735         }
2736
2737         /* Make sure the scan wasn't canceled before this queued work
2738          * was given the chance to run... */
2739         if (!test_bit(STATUS_SCANNING, &priv->status))
2740                 goto done;
2741
2742         /* This should never be called or scheduled if there is currently
2743          * a scan active in the hardware. */
2744         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2745                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2746                                 "Ignoring second request.\n");
2747                 rc = -EIO;
2748                 goto done;
2749         }
2750
2751         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2752                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2753                 goto done;
2754         }
2755
2756         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2757                 IWL_DEBUG_HC(priv,
2758                         "Scan request while abort pending. Queuing.\n");
2759                 goto done;
2760         }
2761
2762         if (iwl_is_rfkill(priv)) {
2763                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2764                 goto done;
2765         }
2766
2767         if (!test_bit(STATUS_READY, &priv->status)) {
2768                 IWL_DEBUG_HC(priv,
2769                         "Scan request while uninitialized. Queuing.\n");
2770                 goto done;
2771         }
2772
2773         if (!priv->scan_bands) {
2774                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2775                 goto done;
2776         }
2777
2778         if (!priv->scan) {
2779                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2780                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2781                 if (!priv->scan) {
2782                         rc = -ENOMEM;
2783                         goto done;
2784                 }
2785         }
2786         scan = priv->scan;
2787         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2788
2789         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2790         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2791
2792         if (iwl_is_associated(priv)) {
2793                 u16 interval = 0;
2794                 u32 extra;
2795                 u32 suspend_time = 100;
2796                 u32 scan_suspend_time = 100;
2797                 unsigned long flags;
2798
2799                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2800
2801                 spin_lock_irqsave(&priv->lock, flags);
2802                 interval = priv->beacon_int;
2803                 spin_unlock_irqrestore(&priv->lock, flags);
2804
2805                 scan->suspend_time = 0;
2806                 scan->max_out_time = cpu_to_le32(200 * 1024);
2807                 if (!interval)
2808                         interval = suspend_time;
2809                 /*
2810                  * suspend time format:
2811                  *  0-19: beacon interval in usec (time before exec.)
2812                  * 20-23: 0
2813                  * 24-31: number of beacons (suspend between channels)
2814                  */
2815
2816                 extra = (suspend_time / interval) << 24;
2817                 scan_suspend_time = 0xFF0FFFFF &
2818                     (extra | ((suspend_time % interval) * 1024));
2819
2820                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2821                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2822                                scan_suspend_time, interval);
2823         }
2824
2825         if (priv->scan_request->n_ssids) {
2826                 int i, p = 0;
2827                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2828                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2829                         /* always does wildcard anyway */
2830                         if (!priv->scan_request->ssids[i].ssid_len)
2831                                 continue;
2832                         scan->direct_scan[p].id = WLAN_EID_SSID;
2833                         scan->direct_scan[p].len =
2834                                 priv->scan_request->ssids[i].ssid_len;
2835                         memcpy(scan->direct_scan[p].ssid,
2836                                priv->scan_request->ssids[i].ssid,
2837                                priv->scan_request->ssids[i].ssid_len);
2838                         n_probes++;
2839                         p++;
2840                 }
2841                 is_active = true;
2842         } else
2843                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2844
2845         /* We don't build a direct scan probe request; the uCode will do
2846          * that based on the direct_mask added to each channel entry */
2847         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2848         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2849         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2850
2851         /* flags + rate selection */
2852
2853         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2854                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2855                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2856                 scan->good_CRC_th = 0;
2857                 band = IEEE80211_BAND_2GHZ;
2858         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2859                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2860                 /*
2861                  * If active scaning is requested but a certain channel
2862                  * is marked passive, we can do active scanning if we
2863                  * detect transmissions.
2864                  */
2865                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2866                 band = IEEE80211_BAND_5GHZ;
2867         } else {
2868                 IWL_WARN(priv, "Invalid scan band count\n");
2869                 goto done;
2870         }
2871
2872         scan->tx_cmd.len = cpu_to_le16(
2873                         iwl_fill_probe_req(priv,
2874                                 (struct ieee80211_mgmt *)scan->data,
2875                                 priv->scan_request->ie,
2876                                 priv->scan_request->ie_len,
2877                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2878
2879         /* select Rx antennas */
2880         scan->flags |= iwl3945_get_antenna_flags(priv);
2881
2882         if (iwl_is_monitor_mode(priv))
2883                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2884
2885         scan->channel_count =
2886                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2887                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2888
2889         if (scan->channel_count == 0) {
2890                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2891                 goto done;
2892         }
2893
2894         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2895             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2896         cmd.data = scan;
2897         scan->len = cpu_to_le16(cmd.len);
2898
2899         set_bit(STATUS_SCAN_HW, &priv->status);
2900         rc = iwl_send_cmd_sync(priv, &cmd);
2901         if (rc)
2902                 goto done;
2903
2904         queue_delayed_work(priv->workqueue, &priv->scan_check,
2905                            IWL_SCAN_CHECK_WATCHDOG);
2906
2907         mutex_unlock(&priv->mutex);
2908         return;
2909
2910  done:
2911         /* can not perform scan make sure we clear scanning
2912          * bits from status so next scan request can be performed.
2913          * if we dont clear scanning status bit here all next scan
2914          * will fail
2915         */
2916         clear_bit(STATUS_SCAN_HW, &priv->status);
2917         clear_bit(STATUS_SCANNING, &priv->status);
2918
2919         /* inform mac80211 scan aborted */
2920         queue_work(priv->workqueue, &priv->scan_completed);
2921         mutex_unlock(&priv->mutex);
2922 }
2923
2924 static void iwl3945_bg_up(struct work_struct *data)
2925 {
2926         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2927
2928         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2929                 return;
2930
2931         mutex_lock(&priv->mutex);
2932         __iwl3945_up(priv);
2933         mutex_unlock(&priv->mutex);
2934 }
2935
2936 static void iwl3945_bg_restart(struct work_struct *data)
2937 {
2938         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2939
2940         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2941                 return;
2942
2943         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2944                 mutex_lock(&priv->mutex);
2945                 priv->vif = NULL;
2946                 priv->is_open = 0;
2947                 mutex_unlock(&priv->mutex);
2948                 iwl3945_down(priv);
2949                 ieee80211_restart_hw(priv->hw);
2950         } else {
2951                 iwl3945_down(priv);
2952                 queue_work(priv->workqueue, &priv->up);
2953         }
2954 }
2955
2956 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2957 {
2958         struct iwl_priv *priv =
2959             container_of(data, struct iwl_priv, rx_replenish);
2960
2961         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2962                 return;
2963
2964         mutex_lock(&priv->mutex);
2965         iwl3945_rx_replenish(priv);
2966         mutex_unlock(&priv->mutex);
2967 }
2968
2969 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2970
2971 void iwl3945_post_associate(struct iwl_priv *priv)
2972 {
2973         int rc = 0;
2974         struct ieee80211_conf *conf = NULL;
2975
2976         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2977                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2978                 return;
2979         }
2980
2981
2982         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2983                         priv->assoc_id, priv->active_rxon.bssid_addr);
2984
2985         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2986                 return;
2987
2988         if (!priv->vif || !priv->is_open)
2989                 return;
2990
2991         iwl_scan_cancel_timeout(priv, 200);
2992
2993         conf = ieee80211_get_hw_conf(priv->hw);
2994
2995         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2996         iwlcore_commit_rxon(priv);
2997
2998         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
2999         iwl_setup_rxon_timing(priv);
3000         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3001                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3002         if (rc)
3003                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3004                             "Attempting to continue.\n");
3005
3006         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3007
3008         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3009
3010         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3011                         priv->assoc_id, priv->beacon_int);
3012
3013         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3014                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3015         else
3016                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3017
3018         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3019                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3020                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3021                 else
3022                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3023
3024                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3025                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3026
3027         }
3028
3029         iwlcore_commit_rxon(priv);
3030
3031         switch (priv->iw_mode) {
3032         case NL80211_IFTYPE_STATION:
3033                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3034                 break;
3035
3036         case NL80211_IFTYPE_ADHOC:
3037
3038                 priv->assoc_id = 1;
3039                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3040                 iwl3945_sync_sta(priv, IWL_STA_ID,
3041                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3042                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3043                                  CMD_ASYNC);
3044                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3045                 iwl3945_send_beacon_cmd(priv);
3046
3047                 break;
3048
3049         default:
3050                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3051                            __func__, priv->iw_mode);
3052                 break;
3053         }
3054
3055         iwl_activate_qos(priv, 0);
3056
3057         /* we have just associated, don't start scan too early */
3058         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3059 }
3060
3061 /*****************************************************************************
3062  *
3063  * mac80211 entry point functions
3064  *
3065  *****************************************************************************/
3066
3067 #define UCODE_READY_TIMEOUT     (2 * HZ)
3068
3069 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3070 {
3071         struct iwl_priv *priv = hw->priv;
3072         int ret;
3073
3074         IWL_DEBUG_MAC80211(priv, "enter\n");
3075
3076         /* we should be verifying the device is ready to be opened */
3077         mutex_lock(&priv->mutex);
3078
3079         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3080          * ucode filename and max sizes are card-specific. */
3081
3082         if (!priv->ucode_code.len) {
3083                 ret = iwl3945_read_ucode(priv);
3084                 if (ret) {
3085                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3086                         mutex_unlock(&priv->mutex);
3087                         goto out_release_irq;
3088                 }
3089         }
3090
3091         ret = __iwl3945_up(priv);
3092
3093         mutex_unlock(&priv->mutex);
3094
3095         if (ret)
3096                 goto out_release_irq;
3097
3098         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3099
3100         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3101          * mac80211 will not be run successfully. */
3102         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3103                         test_bit(STATUS_READY, &priv->status),
3104                         UCODE_READY_TIMEOUT);
3105         if (!ret) {
3106                 if (!test_bit(STATUS_READY, &priv->status)) {
3107                         IWL_ERR(priv,
3108                                 "Wait for START_ALIVE timeout after %dms.\n",
3109                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3110                         ret = -ETIMEDOUT;
3111                         goto out_release_irq;
3112                 }
3113         }
3114
3115         /* ucode is running and will send rfkill notifications,
3116          * no need to poll the killswitch state anymore */
3117         cancel_delayed_work(&priv->rfkill_poll);
3118
3119         priv->is_open = 1;
3120         IWL_DEBUG_MAC80211(priv, "leave\n");
3121         return 0;
3122
3123 out_release_irq:
3124         priv->is_open = 0;
3125         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3126         return ret;
3127 }
3128
3129 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3130 {
3131         struct iwl_priv *priv = hw->priv;
3132
3133         IWL_DEBUG_MAC80211(priv, "enter\n");
3134
3135         if (!priv->is_open) {
3136                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3137                 return;
3138         }
3139
3140         priv->is_open = 0;
3141
3142         if (iwl_is_ready_rf(priv)) {
3143                 /* stop mac, cancel any scan request and clear
3144                  * RXON_FILTER_ASSOC_MSK BIT
3145                  */
3146                 mutex_lock(&priv->mutex);
3147                 iwl_scan_cancel_timeout(priv, 100);
3148                 mutex_unlock(&priv->mutex);
3149         }
3150
3151         iwl3945_down(priv);
3152
3153         flush_workqueue(priv->workqueue);
3154
3155         /* start polling the killswitch state again */
3156         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3157                            round_jiffies_relative(2 * HZ));
3158
3159         IWL_DEBUG_MAC80211(priv, "leave\n");
3160 }
3161
3162 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3163 {
3164         struct iwl_priv *priv = hw->priv;
3165
3166         IWL_DEBUG_MAC80211(priv, "enter\n");
3167
3168         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3169                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3170
3171         if (iwl3945_tx_skb(priv, skb))
3172                 dev_kfree_skb_any(skb);
3173
3174         IWL_DEBUG_MAC80211(priv, "leave\n");
3175         return NETDEV_TX_OK;
3176 }
3177
3178 void iwl3945_config_ap(struct iwl_priv *priv)
3179 {
3180         int rc = 0;
3181
3182         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3183                 return;
3184
3185         /* The following should be done only at AP bring up */
3186         if (!(iwl_is_associated(priv))) {
3187
3188                 /* RXON - unassoc (to set timing command) */
3189                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3190                 iwlcore_commit_rxon(priv);
3191
3192                 /* RXON Timing */
3193                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3194                 iwl_setup_rxon_timing(priv);
3195                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3196                                       sizeof(priv->rxon_timing),
3197                                       &priv->rxon_timing);
3198                 if (rc)
3199                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3200                                         "Attempting to continue.\n");
3201
3202                 /* FIXME: what should be the assoc_id for AP? */
3203                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3204                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3205                         priv->staging_rxon.flags |=
3206                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3207                 else
3208                         priv->staging_rxon.flags &=
3209                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3210
3211                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3212                         if (priv->assoc_capability &
3213                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3214                                 priv->staging_rxon.flags |=
3215                                         RXON_FLG_SHORT_SLOT_MSK;
3216                         else
3217                                 priv->staging_rxon.flags &=
3218                                         ~RXON_FLG_SHORT_SLOT_MSK;
3219
3220                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3221                                 priv->staging_rxon.flags &=
3222                                         ~RXON_FLG_SHORT_SLOT_MSK;
3223                 }
3224                 /* restore RXON assoc */
3225                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3226                 iwlcore_commit_rxon(priv);
3227                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3228         }
3229         iwl3945_send_beacon_cmd(priv);
3230
3231         /* FIXME - we need to add code here to detect a totally new
3232          * configuration, reset the AP, unassoc, rxon timing, assoc,
3233          * clear sta table, add BCAST sta... */
3234 }
3235
3236 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3237                                struct ieee80211_vif *vif,
3238                                struct ieee80211_sta *sta,
3239                                struct ieee80211_key_conf *key)
3240 {
3241         struct iwl_priv *priv = hw->priv;
3242         const u8 *addr;
3243         int ret = 0;
3244         u8 sta_id = IWL_INVALID_STATION;
3245         u8 static_key;
3246
3247         IWL_DEBUG_MAC80211(priv, "enter\n");
3248
3249         if (iwl3945_mod_params.sw_crypto) {
3250                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3251                 return -EOPNOTSUPP;
3252         }
3253
3254         addr = sta ? sta->addr : iwl_bcast_addr;
3255         static_key = !iwl_is_associated(priv);
3256
3257         if (!static_key) {
3258                 sta_id = iwl_find_station(priv, addr);
3259                 if (sta_id == IWL_INVALID_STATION) {
3260                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3261                                             addr);
3262                         return -EINVAL;
3263                 }
3264         }
3265
3266         mutex_lock(&priv->mutex);
3267         iwl_scan_cancel_timeout(priv, 100);
3268         mutex_unlock(&priv->mutex);
3269
3270         switch (cmd) {
3271         case SET_KEY:
3272                 if (static_key)
3273                         ret = iwl3945_set_static_key(priv, key);
3274                 else
3275                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3276                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3277                 break;
3278         case DISABLE_KEY:
3279                 if (static_key)
3280                         ret = iwl3945_remove_static_key(priv);
3281                 else
3282                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3283                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3284                 break;
3285         default:
3286                 ret = -EINVAL;
3287         }
3288
3289         IWL_DEBUG_MAC80211(priv, "leave\n");
3290
3291         return ret;
3292 }
3293
3294 /*****************************************************************************
3295  *
3296  * sysfs attributes
3297  *
3298  *****************************************************************************/
3299
3300 #ifdef CONFIG_IWLWIFI_DEBUG
3301
3302 /*
3303  * The following adds a new attribute to the sysfs representation
3304  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3305  * used for controlling the debug level.
3306  *
3307  * See the level definitions in iwl for details.
3308  */
3309 static ssize_t show_debug_level(struct device *d,
3310                                 struct device_attribute *attr, char *buf)
3311 {
3312         struct iwl_priv *priv = dev_get_drvdata(d);
3313
3314         return sprintf(buf, "0x%08X\n", priv->debug_level);
3315 }
3316 static ssize_t store_debug_level(struct device *d,
3317                                 struct device_attribute *attr,
3318                                  const char *buf, size_t count)
3319 {
3320         struct iwl_priv *priv = dev_get_drvdata(d);
3321         unsigned long val;
3322         int ret;
3323
3324         ret = strict_strtoul(buf, 0, &val);
3325         if (ret)
3326                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3327         else
3328                 priv->debug_level = val;
3329
3330         return strnlen(buf, count);
3331 }
3332
3333 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3334                         show_debug_level, store_debug_level);
3335
3336 #endif /* CONFIG_IWLWIFI_DEBUG */
3337
3338 static ssize_t show_temperature(struct device *d,
3339                                 struct device_attribute *attr, char *buf)
3340 {
3341         struct iwl_priv *priv = dev_get_drvdata(d);
3342
3343         if (!iwl_is_alive(priv))
3344                 return -EAGAIN;
3345
3346         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3347 }
3348
3349 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3350
3351 static ssize_t show_tx_power(struct device *d,
3352                              struct device_attribute *attr, char *buf)
3353 {
3354         struct iwl_priv *priv = dev_get_drvdata(d);
3355         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3356 }
3357
3358 static ssize_t store_tx_power(struct device *d,
3359                               struct device_attribute *attr,
3360                               const char *buf, size_t count)
3361 {
3362         struct iwl_priv *priv = dev_get_drvdata(d);
3363         char *p = (char *)buf;
3364         u32 val;
3365
3366         val = simple_strtoul(p, &p, 10);
3367         if (p == buf)
3368                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3369         else
3370                 iwl3945_hw_reg_set_txpower(priv, val);
3371
3372         return count;
3373 }
3374
3375 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3376
3377 static ssize_t show_flags(struct device *d,
3378                           struct device_attribute *attr, char *buf)
3379 {
3380         struct iwl_priv *priv = dev_get_drvdata(d);
3381
3382         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3383 }
3384
3385 static ssize_t store_flags(struct device *d,
3386                            struct device_attribute *attr,
3387                            const char *buf, size_t count)
3388 {
3389         struct iwl_priv *priv = dev_get_drvdata(d);
3390         u32 flags = simple_strtoul(buf, NULL, 0);
3391
3392         mutex_lock(&priv->mutex);
3393         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3394                 /* Cancel any currently running scans... */
3395                 if (iwl_scan_cancel_timeout(priv, 100))
3396                         IWL_WARN(priv, "Could not cancel scan.\n");
3397                 else {
3398                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3399                                        flags);
3400                         priv->staging_rxon.flags = cpu_to_le32(flags);
3401                         iwlcore_commit_rxon(priv);
3402                 }
3403         }
3404         mutex_unlock(&priv->mutex);
3405
3406         return count;
3407 }
3408
3409 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3410
3411 static ssize_t show_filter_flags(struct device *d,
3412                                  struct device_attribute *attr, char *buf)
3413 {
3414         struct iwl_priv *priv = dev_get_drvdata(d);
3415
3416         return sprintf(buf, "0x%04X\n",
3417                 le32_to_cpu(priv->active_rxon.filter_flags));
3418 }
3419
3420 static ssize_t store_filter_flags(struct device *d,
3421                                   struct device_attribute *attr,
3422                                   const char *buf, size_t count)
3423 {
3424         struct iwl_priv *priv = dev_get_drvdata(d);
3425         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3426
3427         mutex_lock(&priv->mutex);
3428         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3429                 /* Cancel any currently running scans... */
3430                 if (iwl_scan_cancel_timeout(priv, 100))
3431                         IWL_WARN(priv, "Could not cancel scan.\n");
3432                 else {
3433                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3434                                        "0x%04X\n", filter_flags);
3435                         priv->staging_rxon.filter_flags =
3436                                 cpu_to_le32(filter_flags);
3437                         iwlcore_commit_rxon(priv);
3438                 }
3439         }
3440         mutex_unlock(&priv->mutex);
3441
3442         return count;
3443 }
3444
3445 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3446                    store_filter_flags);
3447
3448 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3449
3450 static ssize_t show_measurement(struct device *d,
3451                                 struct device_attribute *attr, char *buf)
3452 {
3453         struct iwl_priv *priv = dev_get_drvdata(d);
3454         struct iwl_spectrum_notification measure_report;
3455         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3456         u8 *data = (u8 *)&measure_report;
3457         unsigned long flags;
3458
3459         spin_lock_irqsave(&priv->lock, flags);
3460         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3461                 spin_unlock_irqrestore(&priv->lock, flags);
3462                 return 0;
3463         }
3464         memcpy(&measure_report, &priv->measure_report, size);
3465         priv->measurement_status = 0;
3466         spin_unlock_irqrestore(&priv->lock, flags);
3467
3468         while (size && (PAGE_SIZE - len)) {
3469                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3470                                    PAGE_SIZE - len, 1);
3471                 len = strlen(buf);
3472                 if (PAGE_SIZE - len)
3473                         buf[len++] = '\n';
3474
3475                 ofs += 16;
3476                 size -= min(size, 16U);
3477         }
3478
3479         return len;
3480 }
3481
3482 static ssize_t store_measurement(struct device *d,
3483                                  struct device_attribute *attr,
3484                                  const char *buf, size_t count)
3485 {
3486         struct iwl_priv *priv = dev_get_drvdata(d);
3487         struct ieee80211_measurement_params params = {
3488                 .channel = le16_to_cpu(priv->active_rxon.channel),
3489                 .start_time = cpu_to_le64(priv->last_tsf),
3490                 .duration = cpu_to_le16(1),
3491         };
3492         u8 type = IWL_MEASURE_BASIC;
3493         u8 buffer[32];
3494         u8 channel;
3495
3496         if (count) {
3497                 char *p = buffer;
3498                 strncpy(buffer, buf, min(sizeof(buffer), count));
3499                 channel = simple_strtoul(p, NULL, 0);
3500                 if (channel)
3501                         params.channel = channel;
3502
3503                 p = buffer;
3504                 while (*p && *p != ' ')
3505                         p++;
3506                 if (*p)
3507                         type = simple_strtoul(p + 1, NULL, 0);
3508         }
3509
3510         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3511                        "channel %d (for '%s')\n", type, params.channel, buf);
3512         iwl3945_get_measurement(priv, &params, type);
3513
3514         return count;
3515 }
3516
3517 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3518                    show_measurement, store_measurement);
3519 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3520
3521 static ssize_t store_retry_rate(struct device *d,
3522                                 struct device_attribute *attr,
3523                                 const char *buf, size_t count)
3524 {
3525         struct iwl_priv *priv = dev_get_drvdata(d);
3526
3527         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3528         if (priv->retry_rate <= 0)
3529                 priv->retry_rate = 1;
3530
3531         return count;
3532 }
3533
3534 static ssize_t show_retry_rate(struct device *d,
3535                                struct device_attribute *attr, char *buf)
3536 {
3537         struct iwl_priv *priv = dev_get_drvdata(d);
3538         return sprintf(buf, "%d", priv->retry_rate);
3539 }
3540
3541 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3542                    store_retry_rate);
3543
3544
3545 static ssize_t store_power_level(struct device *d,
3546                                  struct device_attribute *attr,
3547                                  const char *buf, size_t count)
3548 {
3549         struct iwl_priv *priv = dev_get_drvdata(d);
3550         int ret;
3551         unsigned long mode;
3552
3553
3554         mutex_lock(&priv->mutex);
3555
3556         ret = strict_strtoul(buf, 10, &mode);
3557         if (ret)
3558                 goto out;
3559
3560         ret = iwl_power_set_user_mode(priv, mode);
3561         if (ret) {
3562                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3563                 goto out;
3564         }
3565         ret = count;
3566
3567  out:
3568         mutex_unlock(&priv->mutex);
3569         return ret;
3570 }
3571
3572 static ssize_t show_power_level(struct device *d,
3573                                 struct device_attribute *attr, char *buf)
3574 {
3575         struct iwl_priv *priv = dev_get_drvdata(d);
3576         int level = priv->power_data.power_mode;
3577         char *p = buf;
3578
3579         p += sprintf(p, "%d\n", level);
3580         return p - buf + 1;
3581 }
3582
3583 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR,
3584                    show_power_level, store_power_level);
3585
3586 #define MAX_WX_STRING 80
3587
3588 /* Values are in microsecond */
3589 static const s32 timeout_duration[] = {
3590         350000,
3591         250000,
3592         75000,
3593         37000,
3594         25000,
3595 };
3596 static const s32 period_duration[] = {
3597         400000,
3598         700000,
3599         1000000,
3600         1000000,
3601         1000000
3602 };
3603
3604 static ssize_t show_channels(struct device *d,
3605                              struct device_attribute *attr, char *buf)
3606 {
3607         /* all this shit doesn't belong into sysfs anyway */
3608         return 0;
3609 }
3610
3611 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3612
3613 static ssize_t show_statistics(struct device *d,
3614                                struct device_attribute *attr, char *buf)
3615 {
3616         struct iwl_priv *priv = dev_get_drvdata(d);
3617         u32 size = sizeof(struct iwl3945_notif_statistics);
3618         u32 len = 0, ofs = 0;
3619         u8 *data = (u8 *)&priv->statistics_39;
3620         int rc = 0;
3621
3622         if (!iwl_is_alive(priv))
3623                 return -EAGAIN;
3624
3625         mutex_lock(&priv->mutex);
3626         rc = iwl_send_statistics_request(priv, 0);
3627         mutex_unlock(&priv->mutex);
3628
3629         if (rc) {
3630                 len = sprintf(buf,
3631                               "Error sending statistics request: 0x%08X\n", rc);
3632                 return len;
3633         }
3634
3635         while (size && (PAGE_SIZE - len)) {
3636                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3637                                    PAGE_SIZE - len, 1);
3638                 len = strlen(buf);
3639                 if (PAGE_SIZE - len)
3640                         buf[len++] = '\n';
3641
3642                 ofs += 16;
3643                 size -= min(size, 16U);
3644         }
3645
3646         return len;
3647 }
3648
3649 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3650
3651 static ssize_t show_antenna(struct device *d,
3652                             struct device_attribute *attr, char *buf)
3653 {
3654         struct iwl_priv *priv = dev_get_drvdata(d);
3655
3656         if (!iwl_is_alive(priv))
3657                 return -EAGAIN;
3658
3659         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3660 }
3661
3662 static ssize_t store_antenna(struct device *d,
3663                              struct device_attribute *attr,
3664                              const char *buf, size_t count)
3665 {
3666         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3667         int ant;
3668
3669         if (count == 0)
3670                 return 0;
3671
3672         if (sscanf(buf, "%1i", &ant) != 1) {
3673                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3674                 return count;
3675         }
3676
3677         if ((ant >= 0) && (ant <= 2)) {
3678                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3679                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3680         } else
3681                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3682
3683
3684         return count;
3685 }
3686
3687 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3688
3689 static ssize_t show_status(struct device *d,
3690                            struct device_attribute *attr, char *buf)
3691 {
3692         struct iwl_priv *priv = dev_get_drvdata(d);
3693         if (!iwl_is_alive(priv))
3694                 return -EAGAIN;
3695         return sprintf(buf, "0x%08x\n", (int)priv->status);
3696 }
3697
3698 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3699
3700 static ssize_t dump_error_log(struct device *d,
3701                               struct device_attribute *attr,
3702                               const char *buf, size_t count)
3703 {
3704         struct iwl_priv *priv = dev_get_drvdata(d);
3705         char *p = (char *)buf;
3706
3707         if (p[0] == '1')
3708                 iwl3945_dump_nic_error_log(priv);
3709
3710         return strnlen(buf, count);
3711 }
3712
3713 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3714
3715 static ssize_t dump_event_log(struct device *d,
3716                               struct device_attribute *attr,
3717                               const char *buf, size_t count)
3718 {
3719         struct iwl_priv *priv = dev_get_drvdata(d);
3720         char *p = (char *)buf;
3721
3722         if (p[0] == '1')
3723                 iwl3945_dump_nic_event_log(priv);
3724
3725         return strnlen(buf, count);
3726 }
3727
3728 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
3729
3730 /*****************************************************************************
3731  *
3732  * driver setup and tear down
3733  *
3734  *****************************************************************************/
3735
3736 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3737 {
3738         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3739
3740         init_waitqueue_head(&priv->wait_command_queue);
3741
3742         INIT_WORK(&priv->up, iwl3945_bg_up);
3743         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3744         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3745         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3746         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3747         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3748         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3749         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3750         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3751         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3752         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3753
3754         iwl3945_hw_setup_deferred_work(priv);
3755
3756         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3757                      iwl3945_irq_tasklet, (unsigned long)priv);
3758 }
3759
3760 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3761 {
3762         iwl3945_hw_cancel_deferred_work(priv);
3763
3764         cancel_delayed_work_sync(&priv->init_alive_start);
3765         cancel_delayed_work(&priv->scan_check);
3766         cancel_delayed_work(&priv->alive_start);
3767         cancel_work_sync(&priv->beacon_update);
3768 }
3769
3770 static struct attribute *iwl3945_sysfs_entries[] = {
3771         &dev_attr_antenna.attr,
3772         &dev_attr_channels.attr,
3773         &dev_attr_dump_errors.attr,
3774         &dev_attr_dump_events.attr,
3775         &dev_attr_flags.attr,
3776         &dev_attr_filter_flags.attr,
3777 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3778         &dev_attr_measurement.attr,
3779 #endif
3780         &dev_attr_power_level.attr,
3781         &dev_attr_retry_rate.attr,
3782         &dev_attr_statistics.attr,
3783         &dev_attr_status.attr,
3784         &dev_attr_temperature.attr,
3785         &dev_attr_tx_power.attr,
3786 #ifdef CONFIG_IWLWIFI_DEBUG
3787         &dev_attr_debug_level.attr,
3788 #endif
3789         NULL
3790 };
3791
3792 static struct attribute_group iwl3945_attribute_group = {
3793         .name = NULL,           /* put in device directory */
3794         .attrs = iwl3945_sysfs_entries,
3795 };
3796
3797 static struct ieee80211_ops iwl3945_hw_ops = {
3798         .tx = iwl3945_mac_tx,
3799         .start = iwl3945_mac_start,
3800         .stop = iwl3945_mac_stop,
3801         .add_interface = iwl_mac_add_interface,
3802         .remove_interface = iwl_mac_remove_interface,
3803         .config = iwl_mac_config,
3804         .configure_filter = iwl_configure_filter,
3805         .set_key = iwl3945_mac_set_key,
3806         .get_tx_stats = iwl_mac_get_tx_stats,
3807         .conf_tx = iwl_mac_conf_tx,
3808         .reset_tsf = iwl_mac_reset_tsf,
3809         .bss_info_changed = iwl_bss_info_changed,
3810         .hw_scan = iwl_mac_hw_scan
3811 };
3812
3813 static int iwl3945_init_drv(struct iwl_priv *priv)
3814 {
3815         int ret;
3816         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3817
3818         priv->retry_rate = 1;
3819         priv->ibss_beacon = NULL;
3820
3821         spin_lock_init(&priv->lock);
3822         spin_lock_init(&priv->sta_lock);
3823         spin_lock_init(&priv->hcmd_lock);
3824
3825         INIT_LIST_HEAD(&priv->free_frames);
3826
3827         mutex_init(&priv->mutex);
3828
3829         /* Clear the driver's (not device's) station table */
3830         iwl_clear_stations_table(priv);
3831
3832         priv->data_retry_limit = -1;
3833         priv->ieee_channels = NULL;
3834         priv->ieee_rates = NULL;
3835         priv->band = IEEE80211_BAND_2GHZ;
3836
3837         priv->iw_mode = NL80211_IFTYPE_STATION;
3838
3839         iwl_reset_qos(priv);
3840
3841         priv->qos_data.qos_active = 0;
3842         priv->qos_data.qos_cap.val = 0;
3843
3844         priv->rates_mask = IWL_RATES_MASK;
3845         /* If power management is turned on, default to CAM mode */
3846         priv->power_mode = IWL_POWER_MODE_CAM;
3847         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3848
3849         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3850                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3851                          eeprom->version);
3852                 ret = -EINVAL;
3853                 goto err;
3854         }
3855         ret = iwl_init_channel_map(priv);
3856         if (ret) {
3857                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3858                 goto err;
3859         }
3860
3861         /* Set up txpower settings in driver for all channels */
3862         if (iwl3945_txpower_set_from_eeprom(priv)) {
3863                 ret = -EIO;
3864                 goto err_free_channel_map;
3865         }
3866
3867         ret = iwlcore_init_geos(priv);
3868         if (ret) {
3869                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3870                 goto err_free_channel_map;
3871         }
3872         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3873
3874         return 0;
3875
3876 err_free_channel_map:
3877         iwl_free_channel_map(priv);
3878 err:
3879         return ret;
3880 }
3881
3882 static int iwl3945_setup_mac(struct iwl_priv *priv)
3883 {
3884         int ret;
3885         struct ieee80211_hw *hw = priv->hw;
3886
3887         hw->rate_control_algorithm = "iwl-3945-rs";
3888         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3889
3890         /* Tell mac80211 our characteristics */
3891         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3892                     IEEE80211_HW_NOISE_DBM |
3893                     IEEE80211_HW_SPECTRUM_MGMT;
3894
3895         hw->wiphy->interface_modes =
3896                 BIT(NL80211_IFTYPE_STATION) |
3897                 BIT(NL80211_IFTYPE_ADHOC);
3898
3899         hw->wiphy->custom_regulatory = true;
3900
3901         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3902         /* we create the 802.11 header and a zero-length SSID element */
3903         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3904
3905         /* Default value; 4 EDCA QOS priorities */
3906         hw->queues = 4;
3907
3908         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3909                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3910                         &priv->bands[IEEE80211_BAND_2GHZ];
3911
3912         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3913                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3914                         &priv->bands[IEEE80211_BAND_5GHZ];
3915
3916         ret = ieee80211_register_hw(priv->hw);
3917         if (ret) {
3918                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3919                 return ret;
3920         }
3921         priv->mac80211_registered = 1;
3922
3923         return 0;
3924 }
3925
3926 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3927 {
3928         int err = 0;
3929         struct iwl_priv *priv;
3930         struct ieee80211_hw *hw;
3931         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3932         struct iwl3945_eeprom *eeprom;
3933         unsigned long flags;
3934
3935         /***********************
3936          * 1. Allocating HW data
3937          * ********************/
3938
3939         /* mac80211 allocates memory for this device instance, including
3940          *   space for this driver's private structure */
3941         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3942         if (hw == NULL) {
3943                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3944                 err = -ENOMEM;
3945                 goto out;
3946         }
3947         priv = hw->priv;
3948         SET_IEEE80211_DEV(hw, &pdev->dev);
3949
3950         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
3951              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
3952                 IWL_ERR(priv,
3953                         "invalid queues_num, should be between %d and %d\n",
3954                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
3955                 err = -EINVAL;
3956                 goto out_ieee80211_free_hw;
3957         }
3958
3959         /*
3960          * Disabling hardware scan means that mac80211 will perform scans
3961          * "the hard way", rather than using device's scan.
3962          */
3963         if (iwl3945_mod_params.disable_hw_scan) {
3964                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3965                 iwl3945_hw_ops.hw_scan = NULL;
3966         }
3967
3968
3969         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3970         priv->cfg = cfg;
3971         priv->pci_dev = pdev;
3972         priv->inta_mask = CSR_INI_SET_MASK;
3973
3974 #ifdef CONFIG_IWLWIFI_DEBUG
3975         priv->debug_level = iwl3945_mod_params.debug;
3976         atomic_set(&priv->restrict_refcnt, 0);
3977 #endif
3978
3979         /***************************
3980          * 2. Initializing PCI bus
3981          * *************************/
3982         if (pci_enable_device(pdev)) {
3983                 err = -ENODEV;
3984                 goto out_ieee80211_free_hw;
3985         }
3986
3987         pci_set_master(pdev);
3988
3989         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3990         if (!err)
3991                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3992         if (err) {
3993                 IWL_WARN(priv, "No suitable DMA available.\n");
3994                 goto out_pci_disable_device;
3995         }
3996
3997         pci_set_drvdata(pdev, priv);
3998         err = pci_request_regions(pdev, DRV_NAME);
3999         if (err)
4000                 goto out_pci_disable_device;
4001
4002         /***********************
4003          * 3. Read REV Register
4004          * ********************/
4005         priv->hw_base = pci_iomap(pdev, 0, 0);
4006         if (!priv->hw_base) {
4007                 err = -ENODEV;
4008                 goto out_pci_release_regions;
4009         }
4010
4011         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4012                         (unsigned long long) pci_resource_len(pdev, 0));
4013         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4014
4015         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4016          * PCI Tx retries from interfering with C3 CPU state */
4017         pci_write_config_byte(pdev, 0x41, 0x00);
4018
4019         /* this spin lock will be used in apm_ops.init and EEPROM access
4020          * we should init now
4021          */
4022         spin_lock_init(&priv->reg_lock);
4023
4024         /* amp init */
4025         err = priv->cfg->ops->lib->apm_ops.init(priv);
4026         if (err < 0) {
4027                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
4028                 goto out_iounmap;
4029         }
4030
4031         /***********************
4032          * 4. Read EEPROM
4033          * ********************/
4034
4035         /* Read the EEPROM */
4036         err = iwl_eeprom_init(priv);
4037         if (err) {
4038                 IWL_ERR(priv, "Unable to init EEPROM\n");
4039                 goto out_iounmap;
4040         }
4041         /* MAC Address location in EEPROM same for 3945/4965 */
4042         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4043         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4044         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4045         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4046
4047         /***********************
4048          * 5. Setup HW Constants
4049          * ********************/
4050         /* Device-specific setup */
4051         if (iwl3945_hw_set_hw_params(priv)) {
4052                 IWL_ERR(priv, "failed to set hw settings\n");
4053                 goto out_eeprom_free;
4054         }
4055
4056         /***********************
4057          * 6. Setup priv
4058          * ********************/
4059
4060         err = iwl3945_init_drv(priv);
4061         if (err) {
4062                 IWL_ERR(priv, "initializing driver failed\n");
4063                 goto out_unset_hw_params;
4064         }
4065
4066         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4067                 priv->cfg->name);
4068
4069         /***********************
4070          * 7. Setup Services
4071          * ********************/
4072
4073         spin_lock_irqsave(&priv->lock, flags);
4074         iwl_disable_interrupts(priv);
4075         spin_unlock_irqrestore(&priv->lock, flags);
4076
4077         pci_enable_msi(priv->pci_dev);
4078
4079         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4080                           IRQF_SHARED, DRV_NAME, priv);
4081         if (err) {
4082                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4083                 goto out_disable_msi;
4084         }
4085
4086         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4087         if (err) {
4088                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4089                 goto out_release_irq;
4090         }
4091
4092         iwl_set_rxon_channel(priv,
4093                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4094         iwl3945_setup_deferred_work(priv);
4095         iwl3945_setup_rx_handlers(priv);
4096
4097         /*********************************
4098          * 8. Setup and Register mac80211
4099          * *******************************/
4100
4101         iwl_enable_interrupts(priv);
4102
4103         err = iwl3945_setup_mac(priv);
4104         if (err)
4105                 goto  out_remove_sysfs;
4106
4107         err = iwl_dbgfs_register(priv, DRV_NAME);
4108         if (err)
4109                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4110
4111         /* Start monitoring the killswitch */
4112         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4113                            2 * HZ);
4114
4115         return 0;
4116
4117  out_remove_sysfs:
4118         destroy_workqueue(priv->workqueue);
4119         priv->workqueue = NULL;
4120         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4121  out_release_irq:
4122         free_irq(priv->pci_dev->irq, priv);
4123  out_disable_msi:
4124         pci_disable_msi(priv->pci_dev);
4125         iwlcore_free_geos(priv);
4126         iwl_free_channel_map(priv);
4127  out_unset_hw_params:
4128         iwl3945_unset_hw_params(priv);
4129  out_eeprom_free:
4130         iwl_eeprom_free(priv);
4131  out_iounmap:
4132         pci_iounmap(pdev, priv->hw_base);
4133  out_pci_release_regions:
4134         pci_release_regions(pdev);
4135  out_pci_disable_device:
4136         pci_set_drvdata(pdev, NULL);
4137         pci_disable_device(pdev);
4138  out_ieee80211_free_hw:
4139         ieee80211_free_hw(priv->hw);
4140  out:
4141         return err;
4142 }
4143
4144 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4145 {
4146         struct iwl_priv *priv = pci_get_drvdata(pdev);
4147         unsigned long flags;
4148
4149         if (!priv)
4150                 return;
4151
4152         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4153
4154         iwl_dbgfs_unregister(priv);
4155
4156         set_bit(STATUS_EXIT_PENDING, &priv->status);
4157
4158         if (priv->mac80211_registered) {
4159                 ieee80211_unregister_hw(priv->hw);
4160                 priv->mac80211_registered = 0;
4161         } else {
4162                 iwl3945_down(priv);
4163         }
4164
4165         /* make sure we flush any pending irq or
4166          * tasklet for the driver
4167          */
4168         spin_lock_irqsave(&priv->lock, flags);
4169         iwl_disable_interrupts(priv);
4170         spin_unlock_irqrestore(&priv->lock, flags);
4171
4172         iwl_synchronize_irq(priv);
4173
4174         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4175
4176         cancel_delayed_work_sync(&priv->rfkill_poll);
4177
4178         iwl3945_dealloc_ucode_pci(priv);
4179
4180         if (priv->rxq.bd)
4181                 iwl3945_rx_queue_free(priv, &priv->rxq);
4182         iwl3945_hw_txq_ctx_free(priv);
4183
4184         iwl3945_unset_hw_params(priv);
4185         iwl_clear_stations_table(priv);
4186
4187         /*netif_stop_queue(dev); */
4188         flush_workqueue(priv->workqueue);
4189
4190         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4191          * priv->workqueue... so we can't take down the workqueue
4192          * until now... */
4193         destroy_workqueue(priv->workqueue);
4194         priv->workqueue = NULL;
4195
4196         free_irq(pdev->irq, priv);
4197         pci_disable_msi(pdev);
4198
4199         pci_iounmap(pdev, priv->hw_base);
4200         pci_release_regions(pdev);
4201         pci_disable_device(pdev);
4202         pci_set_drvdata(pdev, NULL);
4203
4204         iwl_free_channel_map(priv);
4205         iwlcore_free_geos(priv);
4206         kfree(priv->scan);
4207         if (priv->ibss_beacon)
4208                 dev_kfree_skb(priv->ibss_beacon);
4209
4210         ieee80211_free_hw(priv->hw);
4211 }
4212
4213
4214 /*****************************************************************************
4215  *
4216  * driver and module entry point
4217  *
4218  *****************************************************************************/
4219
4220 static struct pci_driver iwl3945_driver = {
4221         .name = DRV_NAME,
4222         .id_table = iwl3945_hw_card_ids,
4223         .probe = iwl3945_pci_probe,
4224         .remove = __devexit_p(iwl3945_pci_remove),
4225 #ifdef CONFIG_PM
4226         .suspend = iwl_pci_suspend,
4227         .resume = iwl_pci_resume,
4228 #endif
4229 };
4230
4231 static int __init iwl3945_init(void)
4232 {
4233
4234         int ret;
4235         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4236         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4237
4238         ret = iwl3945_rate_control_register();
4239         if (ret) {
4240                 printk(KERN_ERR DRV_NAME
4241                        "Unable to register rate control algorithm: %d\n", ret);
4242                 return ret;
4243         }
4244
4245         ret = pci_register_driver(&iwl3945_driver);
4246         if (ret) {
4247                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4248                 goto error_register;
4249         }
4250
4251         return ret;
4252
4253 error_register:
4254         iwl3945_rate_control_unregister();
4255         return ret;
4256 }
4257
4258 static void __exit iwl3945_exit(void)
4259 {
4260         pci_unregister_driver(&iwl3945_driver);
4261         iwl3945_rate_control_unregister();
4262 }
4263
4264 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4265
4266 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4267 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4268 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4269 MODULE_PARM_DESC(swcrypto,
4270                  "using software crypto (default 1 [software])\n");
4271 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
4272 MODULE_PARM_DESC(debug, "debug output mask");
4273 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4274 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4275
4276 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
4277 MODULE_PARM_DESC(queues_num, "number of hw queues.");
4278
4279 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4280 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4281
4282 module_exit(iwl3945_exit);
4283 module_init(iwl3945_init);