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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/lib80211.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-helpers.h"
  57 #include "iwl-core.h"
  58 #include "iwl-dev.h"
  59
  60 /*
  61  * module name, copyright, version, etc.
  62  */
  63
  64 #define DRV_DESCRIPTION \
  65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 #define VD "d"
  69 #else
  70 #define VD
  71 #endif
  72
  73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  74 #define VS "s"
  75 #else
  76 #define VS
  77 #endif
  78
  79 #define IWL39_VERSION "1.2.26k" VD VS
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82 #define DRV_VERSION     IWL39_VERSION
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89
  90  /* module parameters */
  91 struct iwl_mod_params iwl3945_mod_params = {
  92         .num_of_queues = IWL39_NUM_QUEUES, /* Not used */
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /**
  99  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 100  * @priv: eeprom and antenna fields are used to determine antenna flags
 101  *
 102  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 103  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 104  *
 105  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 106  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 107  * IWL_ANTENNA_AUX       - Force AUX antenna
 108  */
 109 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 110 {
 111         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 112
 113         switch (iwl3945_mod_params.antenna) {
 114         case IWL_ANTENNA_DIVERSITY:
 115                 return 0;
 116
 117         case IWL_ANTENNA_MAIN:
 118                 if (eeprom->antenna_switch_type)
 119                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 120                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 121
 122         case IWL_ANTENNA_AUX:
 123                 if (eeprom->antenna_switch_type)
 124                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 125                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 126         }
 127
 128         /* bad antenna selector value */
 129         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 130                 iwl3945_mod_params.antenna);
 131
 132         return 0;               /* "diversity" is default if error */
 133 }
 134
 135 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 136                                    struct ieee80211_key_conf *keyconf,
 137                                    u8 sta_id)
 138 {
 139         unsigned long flags;
 140         __le16 key_flags = 0;
 141         int ret;
 142
 143         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 144         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 145
 146         if (sta_id == priv->hw_params.bcast_sta_id)
 147                 key_flags |= STA_KEY_MULTICAST_MSK;
 148
 149         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 150         keyconf->hw_key_idx = keyconf->keyidx;
 151         key_flags &= ~STA_KEY_FLG_INVALID;
 152
 153         spin_lock_irqsave(&priv->sta_lock, flags);
 154         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 155         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 156         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 157                keyconf->keylen);
 158
 159         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 160                keyconf->keylen);
 161
 162         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 163                         == STA_KEY_FLG_NO_ENC)
 164                 priv->stations[sta_id].sta.key.key_offset =
 165                                  iwl_get_free_ucode_key_index(priv);
 166         /* else, we are overriding an existing key => no need to allocated room
 167         * in uCode. */
 168
 169         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 170                 "no space for a new key");
 171
 172         priv->stations[sta_id].sta.key.key_flags = key_flags;
 173         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 174         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 175
 176         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 177
 178         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 179
 180         spin_unlock_irqrestore(&priv->sta_lock, flags);
 181
 182         return ret;
 183 }
 184
 185 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 186                                   struct ieee80211_key_conf *keyconf,
 187                                   u8 sta_id)
 188 {
 189         return -EOPNOTSUPP;
 190 }
 191
 192 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 193                                   struct ieee80211_key_conf *keyconf,
 194                                   u8 sta_id)
 195 {
 196         return -EOPNOTSUPP;
 197 }
 198
 199 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 200 {
 201         unsigned long flags;
 202
 203         spin_lock_irqsave(&priv->sta_lock, flags);
 204         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 205         memset(&priv->stations[sta_id].sta.key, 0,
 206                 sizeof(struct iwl4965_keyinfo));
 207         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 208         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 209         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 210         spin_unlock_irqrestore(&priv->sta_lock, flags);
 211
 212         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 213         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 214         return 0;
 215 }
 216
 217 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 218                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 219 {
 220         int ret = 0;
 221
 222         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 223
 224         switch (keyconf->alg) {
 225         case ALG_CCMP:
 226                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 227                 break;
 228         case ALG_TKIP:
 229                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         case ALG_WEP:
 232                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 233                 break;
 234         default:
 235                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 236                 ret = -EINVAL;
 237         }
 238
 239         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 240                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 241                       sta_id, ret);
 242
 243         return ret;
 244 }
 245
 246 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 247 {
 248         int ret = -EOPNOTSUPP;
 249
 250         return ret;
 251 }
 252
 253 static int iwl3945_set_static_key(struct iwl_priv *priv,
 254                                 struct ieee80211_key_conf *key)
 255 {
 256         if (key->alg == ALG_WEP)
 257                 return -EOPNOTSUPP;
 258
 259         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 260         return -EINVAL;
 261 }
 262
 263 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 264 {
 265         struct list_head *element;
 266
 267         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 268                        priv->frames_count);
 269
 270         while (!list_empty(&priv->free_frames)) {
 271                 element = priv->free_frames.next;
 272                 list_del(element);
 273                 kfree(list_entry(element, struct iwl3945_frame, list));
 274                 priv->frames_count--;
 275         }
 276
 277         if (priv->frames_count) {
 278                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 279                             priv->frames_count);
 280                 priv->frames_count = 0;
 281         }
 282 }
 283
 284 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 285 {
 286         struct iwl3945_frame *frame;
 287         struct list_head *element;
 288         if (list_empty(&priv->free_frames)) {
 289                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 290                 if (!frame) {
 291                         IWL_ERR(priv, "Could not allocate frame!\n");
 292                         return NULL;
 293                 }
 294
 295                 priv->frames_count++;
 296                 return frame;
 297         }
 298
 299         element = priv->free_frames.next;
 300         list_del(element);
 301         return list_entry(element, struct iwl3945_frame, list);
 302 }
 303
 304 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 305 {
 306         memset(frame, 0, sizeof(*frame));
 307         list_add(&frame->list, &priv->free_frames);
 308 }
 309
 310 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 311                                 struct ieee80211_hdr *hdr,
 312                                 int left)
 313 {
 314
 315         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 316             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 317              (priv->iw_mode != NL80211_IFTYPE_AP)))
 318                 return 0;
 319
 320         if (priv->ibss_beacon->len > left)
 321                 return 0;
 322
 323         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 324
 325         return priv->ibss_beacon->len;
 326 }
 327
 328 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 329 {
 330         struct iwl3945_frame *frame;
 331         unsigned int frame_size;
 332         int rc;
 333         u8 rate;
 334
 335         frame = iwl3945_get_free_frame(priv);
 336
 337         if (!frame) {
 338                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 339                           "command.\n");
 340                 return -ENOMEM;
 341         }
 342
 343         rate = iwl_rate_get_lowest_plcp(priv);
 344
 345         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 346
 347         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 348                               &frame->u.cmd[0]);
 349
 350         iwl3945_free_frame(priv, frame);
 351
 352         return rc;
 353 }
 354
 355 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 356 {
 357         if (priv->shared_virt)
 358                 pci_free_consistent(priv->pci_dev,
 359                                     sizeof(struct iwl3945_shared),
 360                                     priv->shared_virt,
 361                                     priv->shared_phys);
 362 }
 363
 364 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 365                                       struct ieee80211_tx_info *info,
 366                                       struct iwl_device_cmd *cmd,
 367                                       struct sk_buff *skb_frag,
 368                                       int sta_id)
 369 {
 370         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 371         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 372
 373         switch (keyinfo->alg) {
 374         case ALG_CCMP:
 375                 tx->sec_ctl = TX_CMD_SEC_CCM;
 376                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 377                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 378                 break;
 379
 380         case ALG_TKIP:
 381                 break;
 382
 383         case ALG_WEP:
 384                 tx->sec_ctl = TX_CMD_SEC_WEP |
 385                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 386
 387                 if (keyinfo->keylen == 13)
 388                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 389
 390                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 391
 392                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 393                              "with key %d\n", info->control.hw_key->hw_key_idx);
 394                 break;
 395
 396         default:
 397                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 398                 break;
 399         }
 400 }
 401
 402 /*
 403  * handle build REPLY_TX command notification.
 404  */
 405 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 406                                   struct iwl_device_cmd *cmd,
 407                                   struct ieee80211_tx_info *info,
 408                                   struct ieee80211_hdr *hdr, u8 std_id)
 409 {
 410         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 411         __le32 tx_flags = tx->tx_flags;
 412         __le16 fc = hdr->frame_control;
 413         u8 rc_flags = info->control.rates[0].flags;
 414
 415         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 416         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 417                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 418                 if (ieee80211_is_mgmt(fc))
 419                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 420                 if (ieee80211_is_probe_resp(fc) &&
 421                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 422                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 423         } else {
 424                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 425                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 426         }
 427
 428         tx->sta_id = std_id;
 429         if (ieee80211_has_morefrags(fc))
 430                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 431
 432         if (ieee80211_is_data_qos(fc)) {
 433                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 434                 tx->tid_tspec = qc[0] & 0xf;
 435                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 436         } else {
 437                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 438         }
 439
 440         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 441                 tx_flags |= TX_CMD_FLG_RTS_MSK;
 442                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 443         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 444                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 445                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 446         }
 447
 448         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 449                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 450
 451         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 452         if (ieee80211_is_mgmt(fc)) {
 453                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 454                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
 455                 else
 456                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
 457         } else {
 458                 tx->timeout.pm_frame_timeout = 0;
 459 #ifdef CONFIG_IWLWIFI_LEDS
 460                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
 461 #endif
 462         }
 463
 464         tx->driver_txop = 0;
 465         tx->tx_flags = tx_flags;
 466         tx->next_frame_len = 0;
 467 }
 468
 469 /*
 470  * start REPLY_TX command process
 471  */
 472 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 473 {
 474         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 475         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 476         struct iwl3945_tx_cmd *tx;
 477         struct iwl_tx_queue *txq = NULL;
 478         struct iwl_queue *q = NULL;
 479         struct iwl_device_cmd *out_cmd;
 480         struct iwl_cmd_meta *out_meta;
 481         dma_addr_t phys_addr;
 482         dma_addr_t txcmd_phys;
 483         int txq_id = skb_get_queue_mapping(skb);
 484         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 485         u8 id;
 486         u8 unicast;
 487         u8 sta_id;
 488         u8 tid = 0;
 489         u16 seq_number = 0;
 490         __le16 fc;
 491         u8 wait_write_ptr = 0;
 492         u8 *qc = NULL;
 493         unsigned long flags;
 494         int rc;
 495
 496         spin_lock_irqsave(&priv->lock, flags);
 497         if (iwl_is_rfkill(priv)) {
 498                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 499                 goto drop_unlock;
 500         }
 501
 502         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 503                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 504                 goto drop_unlock;
 505         }
 506
 507         unicast = !is_multicast_ether_addr(hdr->addr1);
 508         id = 0;
 509
 510         fc = hdr->frame_control;
 511
 512 #ifdef CONFIG_IWLWIFI_DEBUG
 513         if (ieee80211_is_auth(fc))
 514                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 515         else if (ieee80211_is_assoc_req(fc))
 516                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 517         else if (ieee80211_is_reassoc_req(fc))
 518                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 519 #endif
 520
 521         /* drop all data frame if we are not associated */
 522         if (ieee80211_is_data(fc) &&
 523             (!iwl_is_monitor_mode(priv)) && /* packet injection */
 524             (!iwl_is_associated(priv) ||
 525              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 526                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 527                 goto drop_unlock;
 528         }
 529
 530         spin_unlock_irqrestore(&priv->lock, flags);
 531
 532         hdr_len = ieee80211_hdrlen(fc);
 533
 534         /* Find (or create) index into station table for destination station */
 535         sta_id = iwl_get_sta_id(priv, hdr);
 536         if (sta_id == IWL_INVALID_STATION) {
 537                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 538                                hdr->addr1);
 539                 goto drop;
 540         }
 541
 542         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 543
 544         if (ieee80211_is_data_qos(fc)) {
 545                 qc = ieee80211_get_qos_ctl(hdr);
 546                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 547                 if (unlikely(tid >= MAX_TID_COUNT))
 548                         goto drop;
 549                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 550                                 IEEE80211_SCTL_SEQ;
 551                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 552                         (hdr->seq_ctrl &
 553                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 554                 seq_number += 0x10;
 555         }
 556
 557         /* Descriptor for chosen Tx queue */
 558         txq = &priv->txq[txq_id];
 559         q = &txq->q;
 560
 561         spin_lock_irqsave(&priv->lock, flags);
 562
 563         idx = get_cmd_index(q, q->write_ptr, 0);
 564
 565         /* Set up driver data for this TFD */
 566         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 567         txq->txb[q->write_ptr].skb[0] = skb;
 568
 569         /* Init first empty entry in queue's array of Tx/cmd buffers */
 570         out_cmd = txq->cmd[idx];
 571         out_meta = &txq->meta[idx];
 572         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 573         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 574         memset(tx, 0, sizeof(*tx));
 575
 576         /*
 577          * Set up the Tx-command (not MAC!) header.
 578          * Store the chosen Tx queue and TFD index within the sequence field;
 579          * after Tx, uCode's Tx response will return this value so driver can
 580          * locate the frame within the tx queue and do post-tx processing.
 581          */
 582         out_cmd->hdr.cmd = REPLY_TX;
 583         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 584                                 INDEX_TO_SEQ(q->write_ptr)));
 585
 586         /* Copy MAC header from skb into command buffer */
 587         memcpy(tx->hdr, hdr, hdr_len);
 588
 589
 590         if (info->control.hw_key)
 591                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 592
 593         /* TODO need this for burst mode later on */
 594         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 595
 596         /* set is_hcca to 0; it probably will never be implemented */
 597         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 598
 599         /* Total # bytes to be transmitted */
 600         len = (u16)skb->len;
 601         tx->len = cpu_to_le16(len);
 602
 603         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 604         iwl_update_stats(priv, true, fc, len);
 605         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 606         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 607
 608         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 609                 txq->need_update = 1;
 610                 if (qc)
 611                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 612         } else {
 613                 wait_write_ptr = 1;
 614                 txq->need_update = 0;
 615         }
 616
 617         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 618                      le16_to_cpu(out_cmd->hdr.sequence));
 619         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 620         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 621         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 622                            ieee80211_hdrlen(fc));
 623
 624         /*
 625          * Use the first empty entry in this queue's command buffer array
 626          * to contain the Tx command and MAC header concatenated together
 627          * (payload data will be in another buffer).
 628          * Size of this varies, due to varying MAC header length.
 629          * If end is not dword aligned, we'll have 2 extra bytes at the end
 630          * of the MAC header (device reads on dword boundaries).
 631          * We'll tell device about this padding later.
 632          */
 633         len = sizeof(struct iwl3945_tx_cmd) +
 634                         sizeof(struct iwl_cmd_header) + hdr_len;
 635
 636         len_org = len;
 637         len = (len + 3) & ~3;
 638
 639         if (len_org != len)
 640                 len_org = 1;
 641         else
 642                 len_org = 0;
 643
 644         /* Physical address of this Tx command's header (not MAC header!),
 645          * within command buffer array. */
 646         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 647                                     len, PCI_DMA_TODEVICE);
 648         /* we do not map meta data ... so we can safely access address to
 649          * provide to unmap command*/
 650         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 651         pci_unmap_len_set(out_meta, len, len);
 652
 653         /* Add buffer containing Tx command and MAC(!) header to TFD's
 654          * first entry */
 655         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 656                                                    txcmd_phys, len, 1, 0);
 657
 658
 659         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 660          * if any (802.11 null frames have no payload). */
 661         len = skb->len - hdr_len;
 662         if (len) {
 663                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 664                                            len, PCI_DMA_TODEVICE);
 665                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 666                                                            phys_addr, len,
 667                                                            0, U32_PAD(len));
 668         }
 669
 670
 671         /* Tell device the write index *just past* this latest filled TFD */
 672         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 673         rc = iwl_txq_update_write_ptr(priv, txq);
 674         spin_unlock_irqrestore(&priv->lock, flags);
 675
 676         if (rc)
 677                 return rc;
 678
 679         if ((iwl_queue_space(q) < q->high_mark)
 680             && priv->mac80211_registered) {
 681                 if (wait_write_ptr) {
 682                         spin_lock_irqsave(&priv->lock, flags);
 683                         txq->need_update = 1;
 684                         iwl_txq_update_write_ptr(priv, txq);
 685                         spin_unlock_irqrestore(&priv->lock, flags);
 686                 }
 687
 688                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 689         }
 690
 691         return 0;
 692
 693 drop_unlock:
 694         spin_unlock_irqrestore(&priv->lock, flags);
 695 drop:
 696         return -1;
 697 }
 698
 699 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 700
 701 #include "iwl-spectrum.h"
 702
 703 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 704 #define BEACON_TIME_MASK_HIGH   0xFF000000
 705 #define TIME_UNIT               1024
 706
 707 /*
 708  * extended beacon time format
 709  * time in usec will be changed into a 32-bit value in 8:24 format
 710  * the high 1 byte is the beacon counts
 711  * the lower 3 bytes is the time in usec within one beacon interval
 712  */
 713
 714 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 715 {
 716         u32 quot;
 717         u32 rem;
 718         u32 interval = beacon_interval * 1024;
 719
 720         if (!interval || !usec)
 721                 return 0;
 722
 723         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 724         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 725
 726         return (quot << 24) + rem;
 727 }
 728
 729 /* base is usually what we get from ucode with each received frame,
 730  * the same as HW timer counter counting down
 731  */
 732
 733 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 734 {
 735         u32 base_low = base & BEACON_TIME_MASK_LOW;
 736         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 737         u32 interval = beacon_interval * TIME_UNIT;
 738         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 739             (addon & BEACON_TIME_MASK_HIGH);
 740
 741         if (base_low > addon_low)
 742                 res += base_low - addon_low;
 743         else if (base_low < addon_low) {
 744                 res += interval + base_low - addon_low;
 745                 res += (1 << 24);
 746         } else
 747                 res += (1 << 24);
 748
 749         return cpu_to_le32(res);
 750 }
 751
 752 static int iwl3945_get_measurement(struct iwl_priv *priv,
 753                                struct ieee80211_measurement_params *params,
 754                                u8 type)
 755 {
 756         struct iwl_spectrum_cmd spectrum;
 757         struct iwl_rx_packet *res;
 758         struct iwl_host_cmd cmd = {
 759                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 760                 .data = (void *)&spectrum,
 761                 .flags = CMD_WANT_SKB,
 762         };
 763         u32 add_time = le64_to_cpu(params->start_time);
 764         int rc;
 765         int spectrum_resp_status;
 766         int duration = le16_to_cpu(params->duration);
 767
 768         if (iwl_is_associated(priv))
 769                 add_time =
 770                     iwl3945_usecs_to_beacons(
 771                         le64_to_cpu(params->start_time) - priv->last_tsf,
 772                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 773
 774         memset(&spectrum, 0, sizeof(spectrum));
 775
 776         spectrum.channel_count = cpu_to_le16(1);
 777         spectrum.flags =
 778             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 779         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 780         cmd.len = sizeof(spectrum);
 781         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 782
 783         if (iwl_is_associated(priv))
 784                 spectrum.start_time =
 785                     iwl3945_add_beacon_time(priv->last_beacon_time,
 786                                 add_time,
 787                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 788         else
 789                 spectrum.start_time = 0;
 790
 791         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 792         spectrum.channels[0].channel = params->channel;
 793         spectrum.channels[0].type = type;
 794         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 795                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 796                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 797
 798         rc = iwl_send_cmd_sync(priv, &cmd);
 799         if (rc)
 800                 return rc;
 801
 802         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
 803         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 804                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 805                 rc = -EIO;
 806         }
 807
 808         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
 809         switch (spectrum_resp_status) {
 810         case 0:         /* Command will be handled */
 811                 if (res->u.spectrum.id != 0xff) {
 812                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 813                                                 res->u.spectrum.id);
 814                         priv->measurement_status &= ~MEASUREMENT_READY;
 815                 }
 816                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 817                 rc = 0;
 818                 break;
 819
 820         case 1:         /* Command will not be handled */
 821                 rc = -EAGAIN;
 822                 break;
 823         }
 824
 825         dev_kfree_skb_any(cmd.reply_skb);
 826
 827         return rc;
 828 }
 829 #endif
 830
 831 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 832                                struct iwl_rx_mem_buffer *rxb)
 833 {
 834         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 835         struct iwl_alive_resp *palive;
 836         struct delayed_work *pwork;
 837
 838         palive = &pkt->u.alive_frame;
 839
 840         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 841                        "0x%01X 0x%01X\n",
 842                        palive->is_valid, palive->ver_type,
 843                        palive->ver_subtype);
 844
 845         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 846                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 847                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 848                        sizeof(struct iwl_alive_resp));
 849                 pwork = &priv->init_alive_start;
 850         } else {
 851                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 852                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 853                        sizeof(struct iwl_alive_resp));
 854                 pwork = &priv->alive_start;
 855                 iwl3945_disable_events(priv);
 856         }
 857
 858         /* We delay the ALIVE response by 5ms to
 859          * give the HW RF Kill time to activate... */
 860         if (palive->is_valid == UCODE_VALID_OK)
 861                 queue_delayed_work(priv->workqueue, pwork,
 862                                    msecs_to_jiffies(5));
 863         else
 864                 IWL_WARN(priv, "uCode did not respond OK.\n");
 865 }
 866
 867 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 868                                  struct iwl_rx_mem_buffer *rxb)
 869 {
 870 #ifdef CONFIG_IWLWIFI_DEBUG
 871         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 872 #endif
 873
 874         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 875         return;
 876 }
 877
 878 static void iwl3945_bg_beacon_update(struct work_struct *work)
 879 {
 880         struct iwl_priv *priv =
 881                 container_of(work, struct iwl_priv, beacon_update);
 882         struct sk_buff *beacon;
 883
 884         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 885         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 886
 887         if (!beacon) {
 888                 IWL_ERR(priv, "update beacon failed\n");
 889                 return;
 890         }
 891
 892         mutex_lock(&priv->mutex);
 893         /* new beacon skb is allocated every time; dispose previous.*/
 894         if (priv->ibss_beacon)
 895                 dev_kfree_skb(priv->ibss_beacon);
 896
 897         priv->ibss_beacon = beacon;
 898         mutex_unlock(&priv->mutex);
 899
 900         iwl3945_send_beacon_cmd(priv);
 901 }
 902
 903 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 904                                 struct iwl_rx_mem_buffer *rxb)
 905 {
 906 #ifdef CONFIG_IWLWIFI_DEBUG
 907         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 908         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 909         u8 rate = beacon->beacon_notify_hdr.rate;
 910
 911         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 912                 "tsf %d %d rate %d\n",
 913                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 914                 beacon->beacon_notify_hdr.failure_frame,
 915                 le32_to_cpu(beacon->ibss_mgr_status),
 916                 le32_to_cpu(beacon->high_tsf),
 917                 le32_to_cpu(beacon->low_tsf), rate);
 918 #endif
 919
 920         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 921             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 922                 queue_work(priv->workqueue, &priv->beacon_update);
 923 }
 924
 925 /* Handle notification from uCode that card's power state is changing
 926  * due to software, hardware, or critical temperature RFKILL */
 927 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 928                                     struct iwl_rx_mem_buffer *rxb)
 929 {
 930         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 931         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 932         unsigned long status = priv->status;
 933
 934         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 935                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 936                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 937
 938         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 939                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 940
 941         if (flags & HW_CARD_DISABLED)
 942                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 943         else
 944                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 945
 946
 947         iwl_scan_cancel(priv);
 948
 949         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 950              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 951                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 952                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 953         else
 954                 wake_up_interruptible(&priv->wait_command_queue);
 955 }
 956
 957 /**
 958  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 959  *
 960  * Setup the RX handlers for each of the reply types sent from the uCode
 961  * to the host.
 962  *
 963  * This function chains into the hardware specific files for them to setup
 964  * any hardware specific handlers as well.
 965  */
 966 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 967 {
 968         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 969         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 970         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 971         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 972         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 973         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 974             iwl_rx_pm_debug_statistics_notif;
 975         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 976
 977         /*
 978          * The same handler is used for both the REPLY to a discrete
 979          * statistics request from the host as well as for the periodic
 980          * statistics notifications (after received beacons) from the uCode.
 981          */
 982         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 983         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 984
 985         iwl_setup_spectrum_handlers(priv);
 986         iwl_setup_rx_scan_handlers(priv);
 987         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 988
 989         /* Set up hardware specific Rx handlers */
 990         iwl3945_hw_rx_handler_setup(priv);
 991 }
 992
 993 /************************** RX-FUNCTIONS ****************************/
 994 /*
 995  * Rx theory of operation
 996  *
 997  * The host allocates 32 DMA target addresses and passes the host address
 998  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 999  * 0 to 31
1000  *
1001  * Rx Queue Indexes
1002  * The host/firmware share two index registers for managing the Rx buffers.
1003  *
1004  * The READ index maps to the first position that the firmware may be writing
1005  * to -- the driver can read up to (but not including) this position and get
1006  * good data.
1007  * The READ index is managed by the firmware once the card is enabled.
1008  *
1009  * The WRITE index maps to the last position the driver has read from -- the
1010  * position preceding WRITE is the last slot the firmware can place a packet.
1011  *
1012  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1013  * WRITE = READ.
1014  *
1015  * During initialization, the host sets up the READ queue position to the first
1016  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1017  *
1018  * When the firmware places a packet in a buffer, it will advance the READ index
1019  * and fire the RX interrupt.  The driver can then query the READ index and
1020  * process as many packets as possible, moving the WRITE index forward as it
1021  * resets the Rx queue buffers with new memory.
1022  *
1023  * The management in the driver is as follows:
1024  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1025  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1026  *   to replenish the iwl->rxq->rx_free.
1027  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1028  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1029  *   'processed' and 'read' driver indexes as well)
1030  * + A received packet is processed and handed to the kernel network stack,
1031  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1032  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1033  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1034  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1035  *   were enough free buffers and RX_STALLED is set it is cleared.
1036  *
1037  *
1038  * Driver sequence:
1039  *
1040  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1041  *                            iwl3945_rx_queue_restock
1042  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1043  *                            queue, updates firmware pointers, and updates
1044  *                            the WRITE index.  If insufficient rx_free buffers
1045  *                            are available, schedules iwl3945_rx_replenish
1046  *
1047  * -- enable interrupts --
1048  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1049  *                            READ INDEX, detaching the SKB from the pool.
1050  *                            Moves the packet buffer from queue to rx_used.
1051  *                            Calls iwl3945_rx_queue_restock to refill any empty
1052  *                            slots.
1053  * ...
1054  *
1055  */
1056
1057 /**
1058  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1059  */
1060 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1061                                           dma_addr_t dma_addr)
1062 {
1063         return cpu_to_le32((u32)dma_addr);
1064 }
1065
1066 /**
1067  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1068  *
1069  * If there are slots in the RX queue that need to be restocked,
1070  * and we have free pre-allocated buffers, fill the ranks as much
1071  * as we can, pulling from rx_free.
1072  *
1073  * This moves the 'write' index forward to catch up with 'processed', and
1074  * also updates the memory address in the firmware to reference the new
1075  * target buffer.
1076  */
1077 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1078 {
1079         struct iwl_rx_queue *rxq = &priv->rxq;
1080         struct list_head *element;
1081         struct iwl_rx_mem_buffer *rxb;
1082         unsigned long flags;
1083         int write, rc;
1084
1085         spin_lock_irqsave(&rxq->lock, flags);
1086         write = rxq->write & ~0x7;
1087         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1088                 /* Get next free Rx buffer, remove from free list */
1089                 element = rxq->rx_free.next;
1090                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1091                 list_del(element);
1092
1093                 /* Point to Rx buffer via next RBD in circular buffer */
1094                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1095                 rxq->queue[rxq->write] = rxb;
1096                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1097                 rxq->free_count--;
1098         }
1099         spin_unlock_irqrestore(&rxq->lock, flags);
1100         /* If the pre-allocated buffer pool is dropping low, schedule to
1101          * refill it */
1102         if (rxq->free_count <= RX_LOW_WATERMARK)
1103                 queue_work(priv->workqueue, &priv->rx_replenish);
1104
1105
1106         /* If we've added more space for the firmware to place data, tell it.
1107          * Increment device's write pointer in multiples of 8. */
1108         if ((rxq->write_actual != (rxq->write & ~0x7))
1109             || (abs(rxq->write - rxq->read) > 7)) {
1110                 spin_lock_irqsave(&rxq->lock, flags);
1111                 rxq->need_update = 1;
1112                 spin_unlock_irqrestore(&rxq->lock, flags);
1113                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1114                 if (rc)
1115                         return rc;
1116         }
1117
1118         return 0;
1119 }
1120
1121 /**
1122  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1123  *
1124  * When moving to rx_free an SKB is allocated for the slot.
1125  *
1126  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1127  * This is called as a scheduled work item (except for during initialization)
1128  */
1129 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1130 {
1131         struct iwl_rx_queue *rxq = &priv->rxq;
1132         struct list_head *element;
1133         struct iwl_rx_mem_buffer *rxb;
1134         unsigned long flags;
1135
1136         while (1) {
1137                 spin_lock_irqsave(&rxq->lock, flags);
1138
1139                 if (list_empty(&rxq->rx_used)) {
1140                         spin_unlock_irqrestore(&rxq->lock, flags);
1141                         return;
1142                 }
1143
1144                 element = rxq->rx_used.next;
1145                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1146                 list_del(element);
1147                 spin_unlock_irqrestore(&rxq->lock, flags);
1148
1149                 /* Alloc a new receive buffer */
1150                 rxb->skb =
1151                     alloc_skb(priv->hw_params.rx_buf_size,
1152                                 priority);
1153                 if (!rxb->skb) {
1154                         if (net_ratelimit())
1155                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1156                         /* We don't reschedule replenish work here -- we will
1157                          * call the restock method and if it still needs
1158                          * more buffers it will schedule replenish */
1159                         break;
1160                 }
1161
1162                 /* If radiotap head is required, reserve some headroom here.
1163                  * The physical head count is a variable rx_stats->phy_count.
1164                  * We reserve 4 bytes here. Plus these extra bytes, the
1165                  * headroom of the physical head should be enough for the
1166                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1167                  */
1168                 skb_reserve(rxb->skb, 4);
1169
1170                 /* Get physical address of RB/SKB */
1171                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1172                                                 rxb->skb->data,
1173                                                 priv->hw_params.rx_buf_size,
1174                                                 PCI_DMA_FROMDEVICE);
1175
1176                 spin_lock_irqsave(&rxq->lock, flags);
1177                 list_add_tail(&rxb->list, &rxq->rx_free);
1178                 priv->alloc_rxb_skb++;
1179                 rxq->free_count++;
1180                 spin_unlock_irqrestore(&rxq->lock, flags);
1181         }
1182 }
1183
1184 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1185 {
1186         unsigned long flags;
1187         int i;
1188         spin_lock_irqsave(&rxq->lock, flags);
1189         INIT_LIST_HEAD(&rxq->rx_free);
1190         INIT_LIST_HEAD(&rxq->rx_used);
1191         /* Fill the rx_used queue with _all_ of the Rx buffers */
1192         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1193                 /* In the reset function, these buffers may have been allocated
1194                  * to an SKB, so we need to unmap and free potential storage */
1195                 if (rxq->pool[i].skb != NULL) {
1196                         pci_unmap_single(priv->pci_dev,
1197                                          rxq->pool[i].real_dma_addr,
1198                                          priv->hw_params.rx_buf_size,
1199                                          PCI_DMA_FROMDEVICE);
1200                         priv->alloc_rxb_skb--;
1201                         dev_kfree_skb(rxq->pool[i].skb);
1202                         rxq->pool[i].skb = NULL;
1203                 }
1204                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1205         }
1206
1207         /* Set us so that we have processed and used all buffers, but have
1208          * not restocked the Rx queue with fresh buffers */
1209         rxq->read = rxq->write = 0;
1210         rxq->free_count = 0;
1211         rxq->write_actual = 0;
1212         spin_unlock_irqrestore(&rxq->lock, flags);
1213 }
1214
1215 void iwl3945_rx_replenish(void *data)
1216 {
1217         struct iwl_priv *priv = data;
1218         unsigned long flags;
1219
1220         iwl3945_rx_allocate(priv, GFP_KERNEL);
1221
1222         spin_lock_irqsave(&priv->lock, flags);
1223         iwl3945_rx_queue_restock(priv);
1224         spin_unlock_irqrestore(&priv->lock, flags);
1225 }
1226
1227 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1228 {
1229         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1230
1231         iwl3945_rx_queue_restock(priv);
1232 }
1233
1234
1235 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1236  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1237  * This free routine walks the list of POOL entries and if SKB is set to
1238  * non NULL it is unmapped and freed
1239  */
1240 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1241 {
1242         int i;
1243         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1244                 if (rxq->pool[i].skb != NULL) {
1245                         pci_unmap_single(priv->pci_dev,
1246                                          rxq->pool[i].real_dma_addr,
1247                                          priv->hw_params.rx_buf_size,
1248                                          PCI_DMA_FROMDEVICE);
1249                         dev_kfree_skb(rxq->pool[i].skb);
1250                 }
1251         }
1252
1253         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1254                             rxq->dma_addr);
1255         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1256                             rxq->rb_stts, rxq->rb_stts_dma);
1257         rxq->bd = NULL;
1258         rxq->rb_stts  = NULL;
1259 }
1260
1261
1262 /* Convert linear signal-to-noise ratio into dB */
1263 static u8 ratio2dB[100] = {
1264 /*       0   1   2   3   4   5   6   7   8   9 */
1265          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1266         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1267         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1268         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1269         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1270         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1271         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1272         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1273         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1274         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1275 };
1276
1277 /* Calculates a relative dB value from a ratio of linear
1278  *   (i.e. not dB) signal levels.
1279  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1280 int iwl3945_calc_db_from_ratio(int sig_ratio)
1281 {
1282         /* 1000:1 or higher just report as 60 dB */
1283         if (sig_ratio >= 1000)
1284                 return 60;
1285
1286         /* 100:1 or higher, divide by 10 and use table,
1287          *   add 20 dB to make up for divide by 10 */
1288         if (sig_ratio >= 100)
1289                 return 20 + (int)ratio2dB[sig_ratio/10];
1290
1291         /* We shouldn't see this */
1292         if (sig_ratio < 1)
1293                 return 0;
1294
1295         /* Use table for ratios 1:1 - 99:1 */
1296         return (int)ratio2dB[sig_ratio];
1297 }
1298
1299 #define PERFECT_RSSI (-20) /* dBm */
1300 #define WORST_RSSI (-95)   /* dBm */
1301 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1302
1303 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1304  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1305  *   about formulas used below. */
1306 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1307 {
1308         int sig_qual;
1309         int degradation = PERFECT_RSSI - rssi_dbm;
1310
1311         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1312          * as indicator; formula is (signal dbm - noise dbm).
1313          * SNR at or above 40 is a great signal (100%).
1314          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1315          * Weakest usable signal is usually 10 - 15 dB SNR. */
1316         if (noise_dbm) {
1317                 if (rssi_dbm - noise_dbm >= 40)
1318                         return 100;
1319                 else if (rssi_dbm < noise_dbm)
1320                         return 0;
1321                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1322
1323         /* Else use just the signal level.
1324          * This formula is a least squares fit of data points collected and
1325          *   compared with a reference system that had a percentage (%) display
1326          *   for signal quality. */
1327         } else
1328                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1329                             (15 * RSSI_RANGE + 62 * degradation)) /
1330                            (RSSI_RANGE * RSSI_RANGE);
1331
1332         if (sig_qual > 100)
1333                 sig_qual = 100;
1334         else if (sig_qual < 1)
1335                 sig_qual = 0;
1336
1337         return sig_qual;
1338 }
1339
1340 /**
1341  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1342  *
1343  * Uses the priv->rx_handlers callback function array to invoke
1344  * the appropriate handlers, including command responses,
1345  * frame-received notifications, and other notifications.
1346  */
1347 static void iwl3945_rx_handle(struct iwl_priv *priv)
1348 {
1349         struct iwl_rx_mem_buffer *rxb;
1350         struct iwl_rx_packet *pkt;
1351         struct iwl_rx_queue *rxq = &priv->rxq;
1352         u32 r, i;
1353         int reclaim;
1354         unsigned long flags;
1355         u8 fill_rx = 0;
1356         u32 count = 8;
1357         int total_empty = 0;
1358
1359         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1360          * buffer that the driver may process (last buffer filled by ucode). */
1361         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1362         i = rxq->read;
1363
1364         /* calculate total frames need to be restock after handling RX */
1365         total_empty = r - priv->rxq.write_actual;
1366         if (total_empty < 0)
1367                 total_empty += RX_QUEUE_SIZE;
1368
1369         if (total_empty > (RX_QUEUE_SIZE / 2))
1370                 fill_rx = 1;
1371         /* Rx interrupt, but nothing sent from uCode */
1372         if (i == r)
1373                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1374
1375         while (i != r) {
1376                 rxb = rxq->queue[i];
1377
1378                 /* If an RXB doesn't have a Rx queue slot associated with it,
1379                  * then a bug has been introduced in the queue refilling
1380                  * routines -- catch it here */
1381                 BUG_ON(rxb == NULL);
1382
1383                 rxq->queue[i] = NULL;
1384
1385                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1386                                 priv->hw_params.rx_buf_size,
1387                                 PCI_DMA_FROMDEVICE);
1388                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1389
1390                 /* Reclaim a command buffer only if this packet is a response
1391                  *   to a (driver-originated) command.
1392                  * If the packet (e.g. Rx frame) originated from uCode,
1393                  *   there is no command buffer to reclaim.
1394                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1395                  *   but apparently a few don't get set; catch them here. */
1396                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1397                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1398                         (pkt->hdr.cmd != REPLY_TX);
1399
1400                 /* Based on type of command response or notification,
1401                  *   handle those that need handling via function in
1402                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1403                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1404                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1405                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1406                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1407                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1408                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1409                 } else {
1410                         /* No handling needed */
1411                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1412                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1413                                 r, i, get_cmd_string(pkt->hdr.cmd),
1414                                 pkt->hdr.cmd);
1415                 }
1416
1417                 if (reclaim) {
1418                         /* Invoke any callbacks, transfer the skb to caller, and
1419                          * fire off the (possibly) blocking iwl_send_cmd()
1420                          * as we reclaim the driver command queue */
1421                         if (rxb && rxb->skb)
1422                                 iwl_tx_cmd_complete(priv, rxb);
1423                         else
1424                                 IWL_WARN(priv, "Claim null rxb?\n");
1425                 }
1426
1427                 /* For now we just don't re-use anything.  We can tweak this
1428                  * later to try and re-use notification packets and SKBs that
1429                  * fail to Rx correctly */
1430                 if (rxb->skb != NULL) {
1431                         priv->alloc_rxb_skb--;
1432                         dev_kfree_skb_any(rxb->skb);
1433                         rxb->skb = NULL;
1434                 }
1435
1436                 spin_lock_irqsave(&rxq->lock, flags);
1437                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1438                 spin_unlock_irqrestore(&rxq->lock, flags);
1439                 i = (i + 1) & RX_QUEUE_MASK;
1440                 /* If there are a lot of unused frames,
1441                  * restock the Rx queue so ucode won't assert. */
1442                 if (fill_rx) {
1443                         count++;
1444                         if (count >= 8) {
1445                                 priv->rxq.read = i;
1446                                 iwl3945_rx_replenish_now(priv);
1447                                 count = 0;
1448                         }
1449                 }
1450         }
1451
1452         /* Backtrack one entry */
1453         priv->rxq.read = i;
1454         if (fill_rx)
1455                 iwl3945_rx_replenish_now(priv);
1456         else
1457                 iwl3945_rx_queue_restock(priv);
1458 }
1459
1460 /* call this function to flush any scheduled tasklet */
1461 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1462 {
1463         /* wait to make sure we flush pending tasklet*/
1464         synchronize_irq(priv->pci_dev->irq);
1465         tasklet_kill(&priv->irq_tasklet);
1466 }
1467
1468 static const char *desc_lookup(int i)
1469 {
1470         switch (i) {
1471         case 1:
1472                 return "FAIL";
1473         case 2:
1474                 return "BAD_PARAM";
1475         case 3:
1476                 return "BAD_CHECKSUM";
1477         case 4:
1478                 return "NMI_INTERRUPT";
1479         case 5:
1480                 return "SYSASSERT";
1481         case 6:
1482                 return "FATAL_ERROR";
1483         }
1484
1485         return "UNKNOWN";
1486 }
1487
1488 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1489 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1490
1491 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1492 {
1493         u32 i;
1494         u32 desc, time, count, base, data1;
1495         u32 blink1, blink2, ilink1, ilink2;
1496
1497         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1498
1499         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1500                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1501                 return;
1502         }
1503
1504
1505         count = iwl_read_targ_mem(priv, base);
1506
1507         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1508                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1509                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1510                         priv->status, count);
1511         }
1512
1513         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1514                   "ilink1  nmiPC   Line\n");
1515         for (i = ERROR_START_OFFSET;
1516              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1517              i += ERROR_ELEM_SIZE) {
1518                 desc = iwl_read_targ_mem(priv, base + i);
1519                 time =
1520                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1521                 blink1 =
1522                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1523                 blink2 =
1524                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1525                 ilink1 =
1526                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1527                 ilink2 =
1528                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1529                 data1 =
1530                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1531
1532                 IWL_ERR(priv,
1533                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1534                         desc_lookup(desc), desc, time, blink1, blink2,
1535                         ilink1, ilink2, data1);
1536         }
1537
1538 }
1539
1540 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1541
1542 /**
1543  * iwl3945_print_event_log - Dump error event log to syslog
1544  *
1545  */
1546 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1547                                 u32 num_events, u32 mode)
1548 {
1549         u32 i;
1550         u32 base;       /* SRAM byte address of event log header */
1551         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1552         u32 ptr;        /* SRAM byte address of log data */
1553         u32 ev, time, data; /* event log data */
1554
1555         if (num_events == 0)
1556                 return;
1557
1558         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1559
1560         if (mode == 0)
1561                 event_size = 2 * sizeof(u32);
1562         else
1563                 event_size = 3 * sizeof(u32);
1564
1565         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1566
1567         /* "time" is actually "data" for mode 0 (no timestamp).
1568          * place event id # at far right for easier visual parsing. */
1569         for (i = 0; i < num_events; i++) {
1570                 ev = iwl_read_targ_mem(priv, ptr);
1571                 ptr += sizeof(u32);
1572                 time = iwl_read_targ_mem(priv, ptr);
1573                 ptr += sizeof(u32);
1574                 if (mode == 0) {
1575                         /* data, ev */
1576                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1577                 } else {
1578                         data = iwl_read_targ_mem(priv, ptr);
1579                         ptr += sizeof(u32);
1580                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1581                 }
1582         }
1583 }
1584
1585 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1586 {
1587         u32 base;       /* SRAM byte address of event log header */
1588         u32 capacity;   /* event log capacity in # entries */
1589         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1590         u32 num_wraps;  /* # times uCode wrapped to top of log */
1591         u32 next_entry; /* index of next entry to be written by uCode */
1592         u32 size;       /* # entries that we'll print */
1593
1594         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1595         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1596                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1597                 return;
1598         }
1599
1600         /* event log header */
1601         capacity = iwl_read_targ_mem(priv, base);
1602         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1603         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1604         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1605
1606         size = num_wraps ? capacity : next_entry;
1607
1608         /* bail out if nothing in log */
1609         if (size == 0) {
1610                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1611                 return;
1612         }
1613
1614         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1615                   size, num_wraps);
1616
1617         /* if uCode has wrapped back to top of log, start at the oldest entry,
1618          * i.e the next one that uCode would fill. */
1619         if (num_wraps)
1620                 iwl3945_print_event_log(priv, next_entry,
1621                                     capacity - next_entry, mode);
1622
1623         /* (then/else) start at top of log */
1624         iwl3945_print_event_log(priv, 0, next_entry, mode);
1625
1626 }
1627
1628 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1629 {
1630         u32 inta, handled = 0;
1631         u32 inta_fh;
1632         unsigned long flags;
1633 #ifdef CONFIG_IWLWIFI_DEBUG
1634         u32 inta_mask;
1635 #endif
1636
1637         spin_lock_irqsave(&priv->lock, flags);
1638
1639         /* Ack/clear/reset pending uCode interrupts.
1640          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1641          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1642         inta = iwl_read32(priv, CSR_INT);
1643         iwl_write32(priv, CSR_INT, inta);
1644
1645         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1646          * Any new interrupts that happen after this, either while we're
1647          * in this tasklet, or later, will show up in next ISR/tasklet. */
1648         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1649         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1650
1651 #ifdef CONFIG_IWLWIFI_DEBUG
1652         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1653                 /* just for debug */
1654                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1655                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1656                               inta, inta_mask, inta_fh);
1657         }
1658 #endif
1659
1660         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1661          * atomic, make sure that inta covers all the interrupts that
1662          * we've discovered, even if FH interrupt came in just after
1663          * reading CSR_INT. */
1664         if (inta_fh & CSR39_FH_INT_RX_MASK)
1665                 inta |= CSR_INT_BIT_FH_RX;
1666         if (inta_fh & CSR39_FH_INT_TX_MASK)
1667                 inta |= CSR_INT_BIT_FH_TX;
1668
1669         /* Now service all interrupt bits discovered above. */
1670         if (inta & CSR_INT_BIT_HW_ERR) {
1671                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1672
1673                 /* Tell the device to stop sending interrupts */
1674                 iwl_disable_interrupts(priv);
1675
1676                 priv->isr_stats.hw++;
1677                 iwl_irq_handle_error(priv);
1678
1679                 handled |= CSR_INT_BIT_HW_ERR;
1680
1681                 spin_unlock_irqrestore(&priv->lock, flags);
1682
1683                 return;
1684         }
1685
1686 #ifdef CONFIG_IWLWIFI_DEBUG
1687         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1688                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1689                 if (inta & CSR_INT_BIT_SCD) {
1690                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1691                                       "the frame/frames.\n");
1692                         priv->isr_stats.sch++;
1693                 }
1694
1695                 /* Alive notification via Rx interrupt will do the real work */
1696                 if (inta & CSR_INT_BIT_ALIVE) {
1697                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1698                         priv->isr_stats.alive++;
1699                 }
1700         }
1701 #endif
1702         /* Safely ignore these bits for debug checks below */
1703         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1704
1705         /* Error detected by uCode */
1706         if (inta & CSR_INT_BIT_SW_ERR) {
1707                 IWL_ERR(priv, "Microcode SW error detected. "
1708                         "Restarting 0x%X.\n", inta);
1709                 priv->isr_stats.sw++;
1710                 priv->isr_stats.sw_err = inta;
1711                 iwl_irq_handle_error(priv);
1712                 handled |= CSR_INT_BIT_SW_ERR;
1713         }
1714
1715         /* uCode wakes up after power-down sleep */
1716         if (inta & CSR_INT_BIT_WAKEUP) {
1717                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1718                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1719                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1720                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1721                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1722                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1723                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1724                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1725
1726                 priv->isr_stats.wakeup++;
1727                 handled |= CSR_INT_BIT_WAKEUP;
1728         }
1729
1730         /* All uCode command responses, including Tx command responses,
1731          * Rx "responses" (frame-received notification), and other
1732          * notifications from uCode come through here*/
1733         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1734                 iwl3945_rx_handle(priv);
1735                 priv->isr_stats.rx++;
1736                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1737         }
1738
1739         if (inta & CSR_INT_BIT_FH_TX) {
1740                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1741                 priv->isr_stats.tx++;
1742
1743                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1744                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1745                                         (FH39_SRVC_CHNL), 0x0);
1746                 handled |= CSR_INT_BIT_FH_TX;
1747         }
1748
1749         if (inta & ~handled) {
1750                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1751                 priv->isr_stats.unhandled++;
1752         }
1753
1754         if (inta & ~priv->inta_mask) {
1755                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1756                          inta & ~priv->inta_mask);
1757                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1758         }
1759
1760         /* Re-enable all interrupts */
1761         /* only Re-enable if disabled by irq */
1762         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1763                 iwl_enable_interrupts(priv);
1764
1765 #ifdef CONFIG_IWLWIFI_DEBUG
1766         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1767                 inta = iwl_read32(priv, CSR_INT);
1768                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1769                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1770                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1771                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1772         }
1773 #endif
1774         spin_unlock_irqrestore(&priv->lock, flags);
1775 }
1776
1777 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1778                                          enum ieee80211_band band,
1779                                      u8 is_active, u8 n_probes,
1780                                      struct iwl3945_scan_channel *scan_ch)
1781 {
1782         struct ieee80211_channel *chan;
1783         const struct ieee80211_supported_band *sband;
1784         const struct iwl_channel_info *ch_info;
1785         u16 passive_dwell = 0;
1786         u16 active_dwell = 0;
1787         int added, i;
1788
1789         sband = iwl_get_hw_mode(priv, band);
1790         if (!sband)
1791                 return 0;
1792
1793         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1794         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1795
1796         if (passive_dwell <= active_dwell)
1797                 passive_dwell = active_dwell + 1;
1798
1799         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1800                 chan = priv->scan_request->channels[i];
1801
1802                 if (chan->band != band)
1803                         continue;
1804
1805                 scan_ch->channel = chan->hw_value;
1806
1807                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1808                 if (!is_channel_valid(ch_info)) {
1809                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1810                                        scan_ch->channel);
1811                         continue;
1812                 }
1813
1814                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1815                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1816                 /* If passive , set up for auto-switch
1817                  *  and use long active_dwell time.
1818                  */
1819                 if (!is_active || is_channel_passive(ch_info) ||
1820                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1821                         scan_ch->type = 0;      /* passive */
1822                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1823                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1824                 } else {
1825                         scan_ch->type = 1;      /* active */
1826                 }
1827
1828                 /* Set direct probe bits. These may be used both for active
1829                  * scan channels (probes gets sent right away),
1830                  * or for passive channels (probes get se sent only after
1831                  * hearing clear Rx packet).*/
1832                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1833                         if (n_probes)
1834                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1835                 } else {
1836                         /* uCode v1 does not allow setting direct probe bits on
1837                          * passive channel. */
1838                         if ((scan_ch->type & 1) && n_probes)
1839                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1840                 }
1841
1842                 /* Set txpower levels to defaults */
1843                 scan_ch->tpc.dsp_atten = 110;
1844                 /* scan_pwr_info->tpc.dsp_atten; */
1845
1846                 /*scan_pwr_info->tpc.tx_gain; */
1847                 if (band == IEEE80211_BAND_5GHZ)
1848                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1849                 else {
1850                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1851                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1852                          * power level:
1853                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1854                          */
1855                 }
1856
1857                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1858                                scan_ch->channel,
1859                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1860                                (scan_ch->type & 1) ?
1861                                active_dwell : passive_dwell);
1862
1863                 scan_ch++;
1864                 added++;
1865         }
1866
1867         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1868         return added;
1869 }
1870
1871 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1872                               struct ieee80211_rate *rates)
1873 {
1874         int i;
1875
1876         for (i = 0; i < IWL_RATE_COUNT; i++) {
1877                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1878                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1879                 rates[i].hw_value_short = i;
1880                 rates[i].flags = 0;
1881                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1882                         /*
1883                          * If CCK != 1M then set short preamble rate flag.
1884                          */
1885                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1886                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1887                 }
1888         }
1889 }
1890
1891 /******************************************************************************
1892  *
1893  * uCode download functions
1894  *
1895  ******************************************************************************/
1896
1897 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1898 {
1899         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1900         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1901         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1902         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1903         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1904         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1905 }
1906
1907 /**
1908  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1909  *     looking at all data.
1910  */
1911 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1912 {
1913         u32 val;
1914         u32 save_len = len;
1915         int rc = 0;
1916         u32 errcnt;
1917
1918         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1919
1920         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1921                                IWL39_RTC_INST_LOWER_BOUND);
1922
1923         errcnt = 0;
1924         for (; len > 0; len -= sizeof(u32), image++) {
1925                 /* read data comes through single port, auto-incr addr */
1926                 /* NOTE: Use the debugless read so we don't flood kernel log
1927                  * if IWL_DL_IO is set */
1928                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1929                 if (val != le32_to_cpu(*image)) {
1930                         IWL_ERR(priv, "uCode INST section is invalid at "
1931                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1932                                   save_len - len, val, le32_to_cpu(*image));
1933                         rc = -EIO;
1934                         errcnt++;
1935                         if (errcnt >= 20)
1936                                 break;
1937                 }
1938         }
1939
1940
1941         if (!errcnt)
1942                 IWL_DEBUG_INFO(priv,
1943                         "ucode image in INSTRUCTION memory is good\n");
1944
1945         return rc;
1946 }
1947
1948
1949 /**
1950  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1951  *   using sample data 100 bytes apart.  If these sample points are good,
1952  *   it's a pretty good bet that everything between them is good, too.
1953  */
1954 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1955 {
1956         u32 val;
1957         int rc = 0;
1958         u32 errcnt = 0;
1959         u32 i;
1960
1961         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1962
1963         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1964                 /* read data comes through single port, auto-incr addr */
1965                 /* NOTE: Use the debugless read so we don't flood kernel log
1966                  * if IWL_DL_IO is set */
1967                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1968                         i + IWL39_RTC_INST_LOWER_BOUND);
1969                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1970                 if (val != le32_to_cpu(*image)) {
1971 #if 0 /* Enable this if you want to see details */
1972                         IWL_ERR(priv, "uCode INST section is invalid at "
1973                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1974                                   i, val, *image);
1975 #endif
1976                         rc = -EIO;
1977                         errcnt++;
1978                         if (errcnt >= 3)
1979                                 break;
1980                 }
1981         }
1982
1983         return rc;
1984 }
1985
1986
1987 /**
1988  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
1989  *    and verify its contents
1990  */
1991 static int iwl3945_verify_ucode(struct iwl_priv *priv)
1992 {
1993         __le32 *image;
1994         u32 len;
1995         int rc = 0;
1996
1997         /* Try bootstrap */
1998         image = (__le32 *)priv->ucode_boot.v_addr;
1999         len = priv->ucode_boot.len;
2000         rc = iwl3945_verify_inst_sparse(priv, image, len);
2001         if (rc == 0) {
2002                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2003                 return 0;
2004         }
2005
2006         /* Try initialize */
2007         image = (__le32 *)priv->ucode_init.v_addr;
2008         len = priv->ucode_init.len;
2009         rc = iwl3945_verify_inst_sparse(priv, image, len);
2010         if (rc == 0) {
2011                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2012                 return 0;
2013         }
2014
2015         /* Try runtime/protocol */
2016         image = (__le32 *)priv->ucode_code.v_addr;
2017         len = priv->ucode_code.len;
2018         rc = iwl3945_verify_inst_sparse(priv, image, len);
2019         if (rc == 0) {
2020                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2021                 return 0;
2022         }
2023
2024         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2025
2026         /* Since nothing seems to match, show first several data entries in
2027          * instruction SRAM, so maybe visual inspection will give a clue.
2028          * Selection of bootstrap image (vs. other images) is arbitrary. */
2029         image = (__le32 *)priv->ucode_boot.v_addr;
2030         len = priv->ucode_boot.len;
2031         rc = iwl3945_verify_inst_full(priv, image, len);
2032
2033         return rc;
2034 }
2035
2036 static void iwl3945_nic_start(struct iwl_priv *priv)
2037 {
2038         /* Remove all resets to allow NIC to operate */
2039         iwl_write32(priv, CSR_RESET, 0);
2040 }
2041
2042 /**
2043  * iwl3945_read_ucode - Read uCode images from disk file.
2044  *
2045  * Copy into buffers for card to fetch via bus-mastering
2046  */
2047 static int iwl3945_read_ucode(struct iwl_priv *priv)
2048 {
2049         const struct iwl_ucode_header *ucode;
2050         int ret = -EINVAL, index;
2051         const struct firmware *ucode_raw;
2052         /* firmware file name contains uCode/driver compatibility version */
2053         const char *name_pre = priv->cfg->fw_name_pre;
2054         const unsigned int api_max = priv->cfg->ucode_api_max;
2055         const unsigned int api_min = priv->cfg->ucode_api_min;
2056         char buf[25];
2057         u8 *src;
2058         size_t len;
2059         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2060
2061         /* Ask kernel firmware_class module to get the boot firmware off disk.
2062          * request_firmware() is synchronous, file is in memory on return. */
2063         for (index = api_max; index >= api_min; index--) {
2064                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2065                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2066                 if (ret < 0) {
2067                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2068                                   buf, ret);
2069                         if (ret == -ENOENT)
2070                                 continue;
2071                         else
2072                                 goto error;
2073                 } else {
2074                         if (index < api_max)
2075                                 IWL_ERR(priv, "Loaded firmware %s, "
2076                                         "which is deprecated. "
2077                                         " Please use API v%u instead.\n",
2078                                           buf, api_max);
2079                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2080                                        "(%zd bytes) from disk\n",
2081                                        buf, ucode_raw->size);
2082                         break;
2083                 }
2084         }
2085
2086         if (ret < 0)
2087                 goto error;
2088
2089         /* Make sure that we got at least our header! */
2090         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2091                 IWL_ERR(priv, "File size way too small!\n");
2092                 ret = -EINVAL;
2093                 goto err_release;
2094         }
2095
2096         /* Data from ucode file:  header followed by uCode images */
2097         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2098
2099         priv->ucode_ver = le32_to_cpu(ucode->ver);
2100         api_ver = IWL_UCODE_API(priv->ucode_ver);
2101         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2102         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2103         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2104         init_data_size =
2105                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2106         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2107         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2108
2109         /* api_ver should match the api version forming part of the
2110          * firmware filename ... but we don't check for that and only rely
2111          * on the API version read from firmware header from here on forward */
2112
2113         if (api_ver < api_min || api_ver > api_max) {
2114                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2115                           "Driver supports v%u, firmware is v%u.\n",
2116                           api_max, api_ver);
2117                 priv->ucode_ver = 0;
2118                 ret = -EINVAL;
2119                 goto err_release;
2120         }
2121         if (api_ver != api_max)
2122                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2123                           "got %u. New firmware can be obtained "
2124                           "from http://www.intellinuxwireless.org.\n",
2125                           api_max, api_ver);
2126
2127         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2128                 IWL_UCODE_MAJOR(priv->ucode_ver),
2129                 IWL_UCODE_MINOR(priv->ucode_ver),
2130                 IWL_UCODE_API(priv->ucode_ver),
2131                 IWL_UCODE_SERIAL(priv->ucode_ver));
2132
2133         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2134                        priv->ucode_ver);
2135         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2136                        inst_size);
2137         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2138                        data_size);
2139         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2140                        init_size);
2141         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2142                        init_data_size);
2143         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2144                        boot_size);
2145
2146
2147         /* Verify size of file vs. image size info in file's header */
2148         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2149                 inst_size + data_size + init_size +
2150                 init_data_size + boot_size) {
2151
2152                 IWL_DEBUG_INFO(priv,
2153                         "uCode file size %zd does not match expected size\n",
2154                         ucode_raw->size);
2155                 ret = -EINVAL;
2156                 goto err_release;
2157         }
2158
2159         /* Verify that uCode images will fit in card's SRAM */
2160         if (inst_size > IWL39_MAX_INST_SIZE) {
2161                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2162                                inst_size);
2163                 ret = -EINVAL;
2164                 goto err_release;
2165         }
2166
2167         if (data_size > IWL39_MAX_DATA_SIZE) {
2168                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2169                                data_size);
2170                 ret = -EINVAL;
2171                 goto err_release;
2172         }
2173         if (init_size > IWL39_MAX_INST_SIZE) {
2174                 IWL_DEBUG_INFO(priv,
2175                                 "uCode init instr len %d too large to fit in\n",
2176                                 init_size);
2177                 ret = -EINVAL;
2178                 goto err_release;
2179         }
2180         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2181                 IWL_DEBUG_INFO(priv,
2182                                 "uCode init data len %d too large to fit in\n",
2183                                 init_data_size);
2184                 ret = -EINVAL;
2185                 goto err_release;
2186         }
2187         if (boot_size > IWL39_MAX_BSM_SIZE) {
2188                 IWL_DEBUG_INFO(priv,
2189                                 "uCode boot instr len %d too large to fit in\n",
2190                                 boot_size);
2191                 ret = -EINVAL;
2192                 goto err_release;
2193         }
2194
2195         /* Allocate ucode buffers for card's bus-master loading ... */
2196
2197         /* Runtime instructions and 2 copies of data:
2198          * 1) unmodified from disk
2199          * 2) backup cache for save/restore during power-downs */
2200         priv->ucode_code.len = inst_size;
2201         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2202
2203         priv->ucode_data.len = data_size;
2204         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2205
2206         priv->ucode_data_backup.len = data_size;
2207         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2208
2209         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2210             !priv->ucode_data_backup.v_addr)
2211                 goto err_pci_alloc;
2212
2213         /* Initialization instructions and data */
2214         if (init_size && init_data_size) {
2215                 priv->ucode_init.len = init_size;
2216                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2217
2218                 priv->ucode_init_data.len = init_data_size;
2219                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2220
2221                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2222                         goto err_pci_alloc;
2223         }
2224
2225         /* Bootstrap (instructions only, no data) */
2226         if (boot_size) {
2227                 priv->ucode_boot.len = boot_size;
2228                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2229
2230                 if (!priv->ucode_boot.v_addr)
2231                         goto err_pci_alloc;
2232         }
2233
2234         /* Copy images into buffers for card's bus-master reads ... */
2235
2236         /* Runtime instructions (first block of data in file) */
2237         len = inst_size;
2238         IWL_DEBUG_INFO(priv,
2239                 "Copying (but not loading) uCode instr len %zd\n", len);
2240         memcpy(priv->ucode_code.v_addr, src, len);
2241         src += len;
2242
2243         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2244                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2245
2246         /* Runtime data (2nd block)
2247          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2248         len = data_size;
2249         IWL_DEBUG_INFO(priv,
2250                 "Copying (but not loading) uCode data len %zd\n", len);
2251         memcpy(priv->ucode_data.v_addr, src, len);
2252         memcpy(priv->ucode_data_backup.v_addr, src, len);
2253         src += len;
2254
2255         /* Initialization instructions (3rd block) */
2256         if (init_size) {
2257                 len = init_size;
2258                 IWL_DEBUG_INFO(priv,
2259                         "Copying (but not loading) init instr len %zd\n", len);
2260                 memcpy(priv->ucode_init.v_addr, src, len);
2261                 src += len;
2262         }
2263
2264         /* Initialization data (4th block) */
2265         if (init_data_size) {
2266                 len = init_data_size;
2267                 IWL_DEBUG_INFO(priv,
2268                         "Copying (but not loading) init data len %zd\n", len);
2269                 memcpy(priv->ucode_init_data.v_addr, src, len);
2270                 src += len;
2271         }
2272
2273         /* Bootstrap instructions (5th block) */
2274         len = boot_size;
2275         IWL_DEBUG_INFO(priv,
2276                 "Copying (but not loading) boot instr len %zd\n", len);
2277         memcpy(priv->ucode_boot.v_addr, src, len);
2278
2279         /* We have our copies now, allow OS release its copies */
2280         release_firmware(ucode_raw);
2281         return 0;
2282
2283  err_pci_alloc:
2284         IWL_ERR(priv, "failed to allocate pci memory\n");
2285         ret = -ENOMEM;
2286         iwl3945_dealloc_ucode_pci(priv);
2287
2288  err_release:
2289         release_firmware(ucode_raw);
2290
2291  error:
2292         return ret;
2293 }
2294
2295
2296 /**
2297  * iwl3945_set_ucode_ptrs - Set uCode address location
2298  *
2299  * Tell initialization uCode where to find runtime uCode.
2300  *
2301  * BSM registers initially contain pointers to initialization uCode.
2302  * We need to replace them to load runtime uCode inst and data,
2303  * and to save runtime data when powering down.
2304  */
2305 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2306 {
2307         dma_addr_t pinst;
2308         dma_addr_t pdata;
2309
2310         /* bits 31:0 for 3945 */
2311         pinst = priv->ucode_code.p_addr;
2312         pdata = priv->ucode_data_backup.p_addr;
2313
2314         /* Tell bootstrap uCode where to find image to load */
2315         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2316         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2317         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2318                                  priv->ucode_data.len);
2319
2320         /* Inst byte count must be last to set up, bit 31 signals uCode
2321          *   that all new ptr/size info is in place */
2322         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2323                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2324
2325         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2326
2327         return 0;
2328 }
2329
2330 /**
2331  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2332  *
2333  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2334  *
2335  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2336  */
2337 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2338 {
2339         /* Check alive response for "valid" sign from uCode */
2340         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2341                 /* We had an error bringing up the hardware, so take it
2342                  * all the way back down so we can try again */
2343                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2344                 goto restart;
2345         }
2346
2347         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2348          * This is a paranoid check, because we would not have gotten the
2349          * "initialize" alive if code weren't properly loaded.  */
2350         if (iwl3945_verify_ucode(priv)) {
2351                 /* Runtime instruction load was bad;
2352                  * take it all the way back down so we can try again */
2353                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2354                 goto restart;
2355         }
2356
2357         /* Send pointers to protocol/runtime uCode image ... init code will
2358          * load and launch runtime uCode, which will send us another "Alive"
2359          * notification. */
2360         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2361         if (iwl3945_set_ucode_ptrs(priv)) {
2362                 /* Runtime instruction load won't happen;
2363                  * take it all the way back down so we can try again */
2364                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2365                 goto restart;
2366         }
2367         return;
2368
2369  restart:
2370         queue_work(priv->workqueue, &priv->restart);
2371 }
2372
2373 /**
2374  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2375  *                   from protocol/runtime uCode (initialization uCode's
2376  *                   Alive gets handled by iwl3945_init_alive_start()).
2377  */
2378 static void iwl3945_alive_start(struct iwl_priv *priv)
2379 {
2380         int thermal_spin = 0;
2381         u32 rfkill;
2382
2383         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2384
2385         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2386                 /* We had an error bringing up the hardware, so take it
2387                  * all the way back down so we can try again */
2388                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2389                 goto restart;
2390         }
2391
2392         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2393          * This is a paranoid check, because we would not have gotten the
2394          * "runtime" alive if code weren't properly loaded.  */
2395         if (iwl3945_verify_ucode(priv)) {
2396                 /* Runtime instruction load was bad;
2397                  * take it all the way back down so we can try again */
2398                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2399                 goto restart;
2400         }
2401
2402         iwl_clear_stations_table(priv);
2403
2404         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2405         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2406
2407         if (rfkill & 0x1) {
2408                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2409                 /* if RFKILL is not on, then wait for thermal
2410                  * sensor in adapter to kick in */
2411                 while (iwl3945_hw_get_temperature(priv) == 0) {
2412                         thermal_spin++;
2413                         udelay(10);
2414                 }
2415
2416                 if (thermal_spin)
2417                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2418                                        thermal_spin * 10);
2419         } else
2420                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2421
2422         /* After the ALIVE response, we can send commands to 3945 uCode */
2423         set_bit(STATUS_ALIVE, &priv->status);
2424
2425         if (iwl_is_rfkill(priv))
2426                 return;
2427
2428         ieee80211_wake_queues(priv->hw);
2429
2430         priv->active_rate = priv->rates_mask;
2431         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2432
2433         iwl_power_update_mode(priv, false);
2434
2435         if (iwl_is_associated(priv)) {
2436                 struct iwl3945_rxon_cmd *active_rxon =
2437                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2438
2439                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2440                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2441         } else {
2442                 /* Initialize our rx_config data */
2443                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2444         }
2445
2446         /* Configure Bluetooth device coexistence support */
2447         iwl_send_bt_config(priv);
2448
2449         /* Configure the adapter for unassociated operation */
2450         iwlcore_commit_rxon(priv);
2451
2452         iwl3945_reg_txpower_periodic(priv);
2453
2454         iwl3945_led_register(priv);
2455
2456         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2457         set_bit(STATUS_READY, &priv->status);
2458         wake_up_interruptible(&priv->wait_command_queue);
2459
2460         /* reassociate for ADHOC mode */
2461         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2462                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2463                                                                 priv->vif);
2464                 if (beacon)
2465                         iwl_mac_beacon_update(priv->hw, beacon);
2466         }
2467
2468         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2469                 iwl_set_mode(priv, priv->iw_mode);
2470
2471         return;
2472
2473  restart:
2474         queue_work(priv->workqueue, &priv->restart);
2475 }
2476
2477 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2478
2479 static void __iwl3945_down(struct iwl_priv *priv)
2480 {
2481         unsigned long flags;
2482         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2483         struct ieee80211_conf *conf = NULL;
2484
2485         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2486
2487         conf = ieee80211_get_hw_conf(priv->hw);
2488
2489         if (!exit_pending)
2490                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2491
2492         iwl3945_led_unregister(priv);
2493         iwl_clear_stations_table(priv);
2494
2495         /* Unblock any waiting calls */
2496         wake_up_interruptible_all(&priv->wait_command_queue);
2497
2498         /* Wipe out the EXIT_PENDING status bit if we are not actually
2499          * exiting the module */
2500         if (!exit_pending)
2501                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2502
2503         /* stop and reset the on-board processor */
2504         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2505
2506         /* tell the device to stop sending interrupts */
2507         spin_lock_irqsave(&priv->lock, flags);
2508         iwl_disable_interrupts(priv);
2509         spin_unlock_irqrestore(&priv->lock, flags);
2510         iwl_synchronize_irq(priv);
2511
2512         if (priv->mac80211_registered)
2513                 ieee80211_stop_queues(priv->hw);
2514
2515         /* If we have not previously called iwl3945_init() then
2516          * clear all bits but the RF Kill bits and return */
2517         if (!iwl_is_init(priv)) {
2518                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2519                                         STATUS_RF_KILL_HW |
2520                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2521                                         STATUS_GEO_CONFIGURED |
2522                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2523                                         STATUS_EXIT_PENDING;
2524                 goto exit;
2525         }
2526
2527         /* ...otherwise clear out all the status bits but the RF Kill
2528          * bit and continue taking the NIC down. */
2529         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2530                                 STATUS_RF_KILL_HW |
2531                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2532                                 STATUS_GEO_CONFIGURED |
2533                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2534                                 STATUS_FW_ERROR |
2535                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2536                                 STATUS_EXIT_PENDING;
2537
2538         priv->cfg->ops->lib->apm_ops.reset(priv);
2539         spin_lock_irqsave(&priv->lock, flags);
2540         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2541         spin_unlock_irqrestore(&priv->lock, flags);
2542
2543         iwl3945_hw_txq_ctx_stop(priv);
2544         iwl3945_hw_rxq_stop(priv);
2545
2546         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2547                                 APMG_CLK_VAL_DMA_CLK_RQT);
2548
2549         udelay(5);
2550
2551         if (exit_pending)
2552                 priv->cfg->ops->lib->apm_ops.stop(priv);
2553         else
2554                 priv->cfg->ops->lib->apm_ops.reset(priv);
2555
2556  exit:
2557         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2558
2559         if (priv->ibss_beacon)
2560                 dev_kfree_skb(priv->ibss_beacon);
2561         priv->ibss_beacon = NULL;
2562
2563         /* clear out any free frames */
2564         iwl3945_clear_free_frames(priv);
2565 }
2566
2567 static void iwl3945_down(struct iwl_priv *priv)
2568 {
2569         mutex_lock(&priv->mutex);
2570         __iwl3945_down(priv);
2571         mutex_unlock(&priv->mutex);
2572
2573         iwl3945_cancel_deferred_work(priv);
2574 }
2575
2576 #define MAX_HW_RESTARTS 5
2577
2578 static int __iwl3945_up(struct iwl_priv *priv)
2579 {
2580         int rc, i;
2581
2582         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2583                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2584                 return -EIO;
2585         }
2586
2587         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2588                 IWL_ERR(priv, "ucode not available for device bring up\n");
2589                 return -EIO;
2590         }
2591
2592         /* If platform's RF_KILL switch is NOT set to KILL */
2593         if (iwl_read32(priv, CSR_GP_CNTRL) &
2594                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2595                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2596         else {
2597                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2598                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2599                 return -ENODEV;
2600         }
2601
2602         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2603
2604         rc = iwl3945_hw_nic_init(priv);
2605         if (rc) {
2606                 IWL_ERR(priv, "Unable to int nic\n");
2607                 return rc;
2608         }
2609
2610         /* make sure rfkill handshake bits are cleared */
2611         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2612         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2613                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2614
2615         /* clear (again), then enable host interrupts */
2616         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2617         iwl_enable_interrupts(priv);
2618
2619         /* really make sure rfkill handshake bits are cleared */
2620         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2621         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2622
2623         /* Copy original ucode data image from disk into backup cache.
2624          * This will be used to initialize the on-board processor's
2625          * data SRAM for a clean start when the runtime program first loads. */
2626         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2627                priv->ucode_data.len);
2628
2629         /* We return success when we resume from suspend and rf_kill is on. */
2630         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2631                 return 0;
2632
2633         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2634
2635                 iwl_clear_stations_table(priv);
2636
2637                 /* load bootstrap state machine,
2638                  * load bootstrap program into processor's memory,
2639                  * prepare to load the "initialize" uCode */
2640                 priv->cfg->ops->lib->load_ucode(priv);
2641
2642                 if (rc) {
2643                         IWL_ERR(priv,
2644                                 "Unable to set up bootstrap uCode: %d\n", rc);
2645                         continue;
2646                 }
2647
2648                 /* start card; "initialize" will load runtime ucode */
2649                 iwl3945_nic_start(priv);
2650
2651                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2652
2653                 return 0;
2654         }
2655
2656         set_bit(STATUS_EXIT_PENDING, &priv->status);
2657         __iwl3945_down(priv);
2658         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2659
2660         /* tried to restart and config the device for as long as our
2661          * patience could withstand */
2662         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2663         return -EIO;
2664 }
2665
2666
2667 /*****************************************************************************
2668  *
2669  * Workqueue callbacks
2670  *
2671  *****************************************************************************/
2672
2673 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2674 {
2675         struct iwl_priv *priv =
2676             container_of(data, struct iwl_priv, init_alive_start.work);
2677
2678         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2679                 return;
2680
2681         mutex_lock(&priv->mutex);
2682         iwl3945_init_alive_start(priv);
2683         mutex_unlock(&priv->mutex);
2684 }
2685
2686 static void iwl3945_bg_alive_start(struct work_struct *data)
2687 {
2688         struct iwl_priv *priv =
2689             container_of(data, struct iwl_priv, alive_start.work);
2690
2691         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2692                 return;
2693
2694         mutex_lock(&priv->mutex);
2695         iwl3945_alive_start(priv);
2696         mutex_unlock(&priv->mutex);
2697 }
2698
2699 static void iwl3945_rfkill_poll(struct work_struct *data)
2700 {
2701         struct iwl_priv *priv =
2702             container_of(data, struct iwl_priv, rfkill_poll.work);
2703
2704         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2705                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2706         else
2707                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2708
2709         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2710                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2711
2712         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2713                            round_jiffies_relative(2 * HZ));
2714
2715 }
2716
2717 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2718 static void iwl3945_bg_request_scan(struct work_struct *data)
2719 {
2720         struct iwl_priv *priv =
2721             container_of(data, struct iwl_priv, request_scan);
2722         struct iwl_host_cmd cmd = {
2723                 .id = REPLY_SCAN_CMD,
2724                 .len = sizeof(struct iwl3945_scan_cmd),
2725                 .flags = CMD_SIZE_HUGE,
2726         };
2727         int rc = 0;
2728         struct iwl3945_scan_cmd *scan;
2729         struct ieee80211_conf *conf = NULL;
2730         u8 n_probes = 0;
2731         enum ieee80211_band band;
2732         bool is_active = false;
2733
2734         conf = ieee80211_get_hw_conf(priv->hw);
2735
2736         mutex_lock(&priv->mutex);
2737
2738         cancel_delayed_work(&priv->scan_check);
2739
2740         if (!iwl_is_ready(priv)) {
2741                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2742                 goto done;
2743         }
2744
2745         /* Make sure the scan wasn't canceled before this queued work
2746          * was given the chance to run... */
2747         if (!test_bit(STATUS_SCANNING, &priv->status))
2748                 goto done;
2749
2750         /* This should never be called or scheduled if there is currently
2751          * a scan active in the hardware. */
2752         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2753                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2754                                 "Ignoring second request.\n");
2755                 rc = -EIO;
2756                 goto done;
2757         }
2758
2759         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2760                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2761                 goto done;
2762         }
2763
2764         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2765                 IWL_DEBUG_HC(priv,
2766                         "Scan request while abort pending. Queuing.\n");
2767                 goto done;
2768         }
2769
2770         if (iwl_is_rfkill(priv)) {
2771                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2772                 goto done;
2773         }
2774
2775         if (!test_bit(STATUS_READY, &priv->status)) {
2776                 IWL_DEBUG_HC(priv,
2777                         "Scan request while uninitialized. Queuing.\n");
2778                 goto done;
2779         }
2780
2781         if (!priv->scan_bands) {
2782                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2783                 goto done;
2784         }
2785
2786         if (!priv->scan) {
2787                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2788                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2789                 if (!priv->scan) {
2790                         rc = -ENOMEM;
2791                         goto done;
2792                 }
2793         }
2794         scan = priv->scan;
2795         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2796
2797         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2798         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2799
2800         if (iwl_is_associated(priv)) {
2801                 u16 interval = 0;
2802                 u32 extra;
2803                 u32 suspend_time = 100;
2804                 u32 scan_suspend_time = 100;
2805                 unsigned long flags;
2806
2807                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2808
2809                 spin_lock_irqsave(&priv->lock, flags);
2810                 interval = priv->beacon_int;
2811                 spin_unlock_irqrestore(&priv->lock, flags);
2812
2813                 scan->suspend_time = 0;
2814                 scan->max_out_time = cpu_to_le32(200 * 1024);
2815                 if (!interval)
2816                         interval = suspend_time;
2817                 /*
2818                  * suspend time format:
2819                  *  0-19: beacon interval in usec (time before exec.)
2820                  * 20-23: 0
2821                  * 24-31: number of beacons (suspend between channels)
2822                  */
2823
2824                 extra = (suspend_time / interval) << 24;
2825                 scan_suspend_time = 0xFF0FFFFF &
2826                     (extra | ((suspend_time % interval) * 1024));
2827
2828                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2829                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2830                                scan_suspend_time, interval);
2831         }
2832
2833         if (priv->scan_request->n_ssids) {
2834                 int i, p = 0;
2835                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2836                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2837                         /* always does wildcard anyway */
2838                         if (!priv->scan_request->ssids[i].ssid_len)
2839                                 continue;
2840                         scan->direct_scan[p].id = WLAN_EID_SSID;
2841                         scan->direct_scan[p].len =
2842                                 priv->scan_request->ssids[i].ssid_len;
2843                         memcpy(scan->direct_scan[p].ssid,
2844                                priv->scan_request->ssids[i].ssid,
2845                                priv->scan_request->ssids[i].ssid_len);
2846                         n_probes++;
2847                         p++;
2848                 }
2849                 is_active = true;
2850         } else
2851                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2852
2853         /* We don't build a direct scan probe request; the uCode will do
2854          * that based on the direct_mask added to each channel entry */
2855         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2856         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2857         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2858
2859         /* flags + rate selection */
2860
2861         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2862                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2863                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2864                 scan->good_CRC_th = 0;
2865                 band = IEEE80211_BAND_2GHZ;
2866         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2867                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2868                 /*
2869                  * If active scaning is requested but a certain channel
2870                  * is marked passive, we can do active scanning if we
2871                  * detect transmissions.
2872                  */
2873                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2874                 band = IEEE80211_BAND_5GHZ;
2875         } else {
2876                 IWL_WARN(priv, "Invalid scan band count\n");
2877                 goto done;
2878         }
2879
2880         scan->tx_cmd.len = cpu_to_le16(
2881                         iwl_fill_probe_req(priv,
2882                                 (struct ieee80211_mgmt *)scan->data,
2883                                 priv->scan_request->ie,
2884                                 priv->scan_request->ie_len,
2885                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2886
2887         /* select Rx antennas */
2888         scan->flags |= iwl3945_get_antenna_flags(priv);
2889
2890         if (iwl_is_monitor_mode(priv))
2891                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2892
2893         scan->channel_count =
2894                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2895                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2896
2897         if (scan->channel_count == 0) {
2898                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2899                 goto done;
2900         }
2901
2902         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2903             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2904         cmd.data = scan;
2905         scan->len = cpu_to_le16(cmd.len);
2906
2907         set_bit(STATUS_SCAN_HW, &priv->status);
2908         rc = iwl_send_cmd_sync(priv, &cmd);
2909         if (rc)
2910                 goto done;
2911
2912         queue_delayed_work(priv->workqueue, &priv->scan_check,
2913                            IWL_SCAN_CHECK_WATCHDOG);
2914
2915         mutex_unlock(&priv->mutex);
2916         return;
2917
2918  done:
2919         /* can not perform scan make sure we clear scanning
2920          * bits from status so next scan request can be performed.
2921          * if we dont clear scanning status bit here all next scan
2922          * will fail
2923         */
2924         clear_bit(STATUS_SCAN_HW, &priv->status);
2925         clear_bit(STATUS_SCANNING, &priv->status);
2926
2927         /* inform mac80211 scan aborted */
2928         queue_work(priv->workqueue, &priv->scan_completed);
2929         mutex_unlock(&priv->mutex);
2930 }
2931
2932 static void iwl3945_bg_up(struct work_struct *data)
2933 {
2934         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2935
2936         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2937                 return;
2938
2939         mutex_lock(&priv->mutex);
2940         __iwl3945_up(priv);
2941         mutex_unlock(&priv->mutex);
2942 }
2943
2944 static void iwl3945_bg_restart(struct work_struct *data)
2945 {
2946         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2947
2948         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2949                 return;
2950
2951         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2952                 mutex_lock(&priv->mutex);
2953                 priv->vif = NULL;
2954                 priv->is_open = 0;
2955                 mutex_unlock(&priv->mutex);
2956                 iwl3945_down(priv);
2957                 ieee80211_restart_hw(priv->hw);
2958         } else {
2959                 iwl3945_down(priv);
2960                 queue_work(priv->workqueue, &priv->up);
2961         }
2962 }
2963
2964 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2965 {
2966         struct iwl_priv *priv =
2967             container_of(data, struct iwl_priv, rx_replenish);
2968
2969         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2970                 return;
2971
2972         mutex_lock(&priv->mutex);
2973         iwl3945_rx_replenish(priv);
2974         mutex_unlock(&priv->mutex);
2975 }
2976
2977 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2978
2979 void iwl3945_post_associate(struct iwl_priv *priv)
2980 {
2981         int rc = 0;
2982         struct ieee80211_conf *conf = NULL;
2983
2984         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2985                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2986                 return;
2987         }
2988
2989
2990         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2991                         priv->assoc_id, priv->active_rxon.bssid_addr);
2992
2993         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2994                 return;
2995
2996         if (!priv->vif || !priv->is_open)
2997                 return;
2998
2999         iwl_scan_cancel_timeout(priv, 200);
3000
3001         conf = ieee80211_get_hw_conf(priv->hw);
3002
3003         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3004         iwlcore_commit_rxon(priv);
3005
3006         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3007         iwl_setup_rxon_timing(priv);
3008         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3009                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3010         if (rc)
3011                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3012                             "Attempting to continue.\n");
3013
3014         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3015
3016         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3017
3018         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3019                         priv->assoc_id, priv->beacon_int);
3020
3021         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3022                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3023         else
3024                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3025
3026         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3027                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3028                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3029                 else
3030                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3031
3032                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3033                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3034
3035         }
3036
3037         iwlcore_commit_rxon(priv);
3038
3039         switch (priv->iw_mode) {
3040         case NL80211_IFTYPE_STATION:
3041                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3042                 break;
3043
3044         case NL80211_IFTYPE_ADHOC:
3045
3046                 priv->assoc_id = 1;
3047                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3048                 iwl3945_sync_sta(priv, IWL_STA_ID,
3049                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3050                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3051                                  CMD_ASYNC);
3052                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3053                 iwl3945_send_beacon_cmd(priv);
3054
3055                 break;
3056
3057         default:
3058                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3059                            __func__, priv->iw_mode);
3060                 break;
3061         }
3062
3063         iwl_activate_qos(priv, 0);
3064
3065         /* we have just associated, don't start scan too early */
3066         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3067 }
3068
3069 /*****************************************************************************
3070  *
3071  * mac80211 entry point functions
3072  *
3073  *****************************************************************************/
3074
3075 #define UCODE_READY_TIMEOUT     (2 * HZ)
3076
3077 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3078 {
3079         struct iwl_priv *priv = hw->priv;
3080         int ret;
3081
3082         IWL_DEBUG_MAC80211(priv, "enter\n");
3083
3084         /* we should be verifying the device is ready to be opened */
3085         mutex_lock(&priv->mutex);
3086
3087         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3088          * ucode filename and max sizes are card-specific. */
3089
3090         if (!priv->ucode_code.len) {
3091                 ret = iwl3945_read_ucode(priv);
3092                 if (ret) {
3093                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3094                         mutex_unlock(&priv->mutex);
3095                         goto out_release_irq;
3096                 }
3097         }
3098
3099         ret = __iwl3945_up(priv);
3100
3101         mutex_unlock(&priv->mutex);
3102
3103         if (ret)
3104                 goto out_release_irq;
3105
3106         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3107
3108         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3109          * mac80211 will not be run successfully. */
3110         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3111                         test_bit(STATUS_READY, &priv->status),
3112                         UCODE_READY_TIMEOUT);
3113         if (!ret) {
3114                 if (!test_bit(STATUS_READY, &priv->status)) {
3115                         IWL_ERR(priv,
3116                                 "Wait for START_ALIVE timeout after %dms.\n",
3117                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3118                         ret = -ETIMEDOUT;
3119                         goto out_release_irq;
3120                 }
3121         }
3122
3123         /* ucode is running and will send rfkill notifications,
3124          * no need to poll the killswitch state anymore */
3125         cancel_delayed_work(&priv->rfkill_poll);
3126
3127         priv->is_open = 1;
3128         IWL_DEBUG_MAC80211(priv, "leave\n");
3129         return 0;
3130
3131 out_release_irq:
3132         priv->is_open = 0;
3133         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3134         return ret;
3135 }
3136
3137 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3138 {
3139         struct iwl_priv *priv = hw->priv;
3140
3141         IWL_DEBUG_MAC80211(priv, "enter\n");
3142
3143         if (!priv->is_open) {
3144                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3145                 return;
3146         }
3147
3148         priv->is_open = 0;
3149
3150         if (iwl_is_ready_rf(priv)) {
3151                 /* stop mac, cancel any scan request and clear
3152                  * RXON_FILTER_ASSOC_MSK BIT
3153                  */
3154                 mutex_lock(&priv->mutex);
3155                 iwl_scan_cancel_timeout(priv, 100);
3156                 mutex_unlock(&priv->mutex);
3157         }
3158
3159         iwl3945_down(priv);
3160
3161         flush_workqueue(priv->workqueue);
3162
3163         /* start polling the killswitch state again */
3164         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3165                            round_jiffies_relative(2 * HZ));
3166
3167         IWL_DEBUG_MAC80211(priv, "leave\n");
3168 }
3169
3170 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3171 {
3172         struct iwl_priv *priv = hw->priv;
3173
3174         IWL_DEBUG_MAC80211(priv, "enter\n");
3175
3176         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3177                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3178
3179         if (iwl3945_tx_skb(priv, skb))
3180                 dev_kfree_skb_any(skb);
3181
3182         IWL_DEBUG_MAC80211(priv, "leave\n");
3183         return NETDEV_TX_OK;
3184 }
3185
3186 void iwl3945_config_ap(struct iwl_priv *priv)
3187 {
3188         int rc = 0;
3189
3190         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3191                 return;
3192
3193         /* The following should be done only at AP bring up */
3194         if (!(iwl_is_associated(priv))) {
3195
3196                 /* RXON - unassoc (to set timing command) */
3197                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3198                 iwlcore_commit_rxon(priv);
3199
3200                 /* RXON Timing */
3201                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3202                 iwl_setup_rxon_timing(priv);
3203                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3204                                       sizeof(priv->rxon_timing),
3205                                       &priv->rxon_timing);
3206                 if (rc)
3207                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3208                                         "Attempting to continue.\n");
3209
3210                 /* FIXME: what should be the assoc_id for AP? */
3211                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3212                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3213                         priv->staging_rxon.flags |=
3214                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3215                 else
3216                         priv->staging_rxon.flags &=
3217                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3218
3219                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3220                         if (priv->assoc_capability &
3221                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3222                                 priv->staging_rxon.flags |=
3223                                         RXON_FLG_SHORT_SLOT_MSK;
3224                         else
3225                                 priv->staging_rxon.flags &=
3226                                         ~RXON_FLG_SHORT_SLOT_MSK;
3227
3228                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3229                                 priv->staging_rxon.flags &=
3230                                         ~RXON_FLG_SHORT_SLOT_MSK;
3231                 }
3232                 /* restore RXON assoc */
3233                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3234                 iwlcore_commit_rxon(priv);
3235                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3236         }
3237         iwl3945_send_beacon_cmd(priv);
3238
3239         /* FIXME - we need to add code here to detect a totally new
3240          * configuration, reset the AP, unassoc, rxon timing, assoc,
3241          * clear sta table, add BCAST sta... */
3242 }
3243
3244 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3245                                struct ieee80211_vif *vif,
3246                                struct ieee80211_sta *sta,
3247                                struct ieee80211_key_conf *key)
3248 {
3249         struct iwl_priv *priv = hw->priv;
3250         const u8 *addr;
3251         int ret = 0;
3252         u8 sta_id = IWL_INVALID_STATION;
3253         u8 static_key;
3254
3255         IWL_DEBUG_MAC80211(priv, "enter\n");
3256
3257         if (iwl3945_mod_params.sw_crypto) {
3258                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3259                 return -EOPNOTSUPP;
3260         }
3261
3262         addr = sta ? sta->addr : iwl_bcast_addr;
3263         static_key = !iwl_is_associated(priv);
3264
3265         if (!static_key) {
3266                 sta_id = iwl_find_station(priv, addr);
3267                 if (sta_id == IWL_INVALID_STATION) {
3268                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3269                                             addr);
3270                         return -EINVAL;
3271                 }
3272         }
3273
3274         mutex_lock(&priv->mutex);
3275         iwl_scan_cancel_timeout(priv, 100);
3276         mutex_unlock(&priv->mutex);
3277
3278         switch (cmd) {
3279         case SET_KEY:
3280                 if (static_key)
3281                         ret = iwl3945_set_static_key(priv, key);
3282                 else
3283                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3284                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3285                 break;
3286         case DISABLE_KEY:
3287                 if (static_key)
3288                         ret = iwl3945_remove_static_key(priv);
3289                 else
3290                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3291                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3292                 break;
3293         default:
3294                 ret = -EINVAL;
3295         }
3296
3297         IWL_DEBUG_MAC80211(priv, "leave\n");
3298
3299         return ret;
3300 }
3301
3302 /*****************************************************************************
3303  *
3304  * sysfs attributes
3305  *
3306  *****************************************************************************/
3307
3308 #ifdef CONFIG_IWLWIFI_DEBUG
3309
3310 /*
3311  * The following adds a new attribute to the sysfs representation
3312  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3313  * used for controlling the debug level.
3314  *
3315  * See the level definitions in iwl for details.
3316  *
3317  * The debug_level being managed using sysfs below is a per device debug
3318  * level that is used instead of the global debug level if it (the per
3319  * device debug level) is set.
3320  */
3321 static ssize_t show_debug_level(struct device *d,
3322                                 struct device_attribute *attr, char *buf)
3323 {
3324         struct iwl_priv *priv = dev_get_drvdata(d);
3325         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3326 }
3327 static ssize_t store_debug_level(struct device *d,
3328                                 struct device_attribute *attr,
3329                                  const char *buf, size_t count)
3330 {
3331         struct iwl_priv *priv = dev_get_drvdata(d);
3332         unsigned long val;
3333         int ret;
3334
3335         ret = strict_strtoul(buf, 0, &val);
3336         if (ret)
3337                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3338         else {
3339                 priv->debug_level = val;
3340                 if (iwl_alloc_traffic_mem(priv))
3341                         IWL_ERR(priv,
3342                                 "Not enough memory to generate traffic log\n");
3343         }
3344         return strnlen(buf, count);
3345 }
3346
3347 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3348                         show_debug_level, store_debug_level);
3349
3350 #endif /* CONFIG_IWLWIFI_DEBUG */
3351
3352 static ssize_t show_temperature(struct device *d,
3353                                 struct device_attribute *attr, char *buf)
3354 {
3355         struct iwl_priv *priv = dev_get_drvdata(d);
3356
3357         if (!iwl_is_alive(priv))
3358                 return -EAGAIN;
3359
3360         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3361 }
3362
3363 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3364
3365 static ssize_t show_tx_power(struct device *d,
3366                              struct device_attribute *attr, char *buf)
3367 {
3368         struct iwl_priv *priv = dev_get_drvdata(d);
3369         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3370 }
3371
3372 static ssize_t store_tx_power(struct device *d,
3373                               struct device_attribute *attr,
3374                               const char *buf, size_t count)
3375 {
3376         struct iwl_priv *priv = dev_get_drvdata(d);
3377         char *p = (char *)buf;
3378         u32 val;
3379
3380         val = simple_strtoul(p, &p, 10);
3381         if (p == buf)
3382                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3383         else
3384                 iwl3945_hw_reg_set_txpower(priv, val);
3385
3386         return count;
3387 }
3388
3389 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3390
3391 static ssize_t show_flags(struct device *d,
3392                           struct device_attribute *attr, char *buf)
3393 {
3394         struct iwl_priv *priv = dev_get_drvdata(d);
3395
3396         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3397 }
3398
3399 static ssize_t store_flags(struct device *d,
3400                            struct device_attribute *attr,
3401                            const char *buf, size_t count)
3402 {
3403         struct iwl_priv *priv = dev_get_drvdata(d);
3404         u32 flags = simple_strtoul(buf, NULL, 0);
3405
3406         mutex_lock(&priv->mutex);
3407         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3408                 /* Cancel any currently running scans... */
3409                 if (iwl_scan_cancel_timeout(priv, 100))
3410                         IWL_WARN(priv, "Could not cancel scan.\n");
3411                 else {
3412                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3413                                        flags);
3414                         priv->staging_rxon.flags = cpu_to_le32(flags);
3415                         iwlcore_commit_rxon(priv);
3416                 }
3417         }
3418         mutex_unlock(&priv->mutex);
3419
3420         return count;
3421 }
3422
3423 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3424
3425 static ssize_t show_filter_flags(struct device *d,
3426                                  struct device_attribute *attr, char *buf)
3427 {
3428         struct iwl_priv *priv = dev_get_drvdata(d);
3429
3430         return sprintf(buf, "0x%04X\n",
3431                 le32_to_cpu(priv->active_rxon.filter_flags));
3432 }
3433
3434 static ssize_t store_filter_flags(struct device *d,
3435                                   struct device_attribute *attr,
3436                                   const char *buf, size_t count)
3437 {
3438         struct iwl_priv *priv = dev_get_drvdata(d);
3439         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3440
3441         mutex_lock(&priv->mutex);
3442         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3443                 /* Cancel any currently running scans... */
3444                 if (iwl_scan_cancel_timeout(priv, 100))
3445                         IWL_WARN(priv, "Could not cancel scan.\n");
3446                 else {
3447                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3448                                        "0x%04X\n", filter_flags);
3449                         priv->staging_rxon.filter_flags =
3450                                 cpu_to_le32(filter_flags);
3451                         iwlcore_commit_rxon(priv);
3452                 }
3453         }
3454         mutex_unlock(&priv->mutex);
3455
3456         return count;
3457 }
3458
3459 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3460                    store_filter_flags);
3461
3462 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3463
3464 static ssize_t show_measurement(struct device *d,
3465                                 struct device_attribute *attr, char *buf)
3466 {
3467         struct iwl_priv *priv = dev_get_drvdata(d);
3468         struct iwl_spectrum_notification measure_report;
3469         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3470         u8 *data = (u8 *)&measure_report;
3471         unsigned long flags;
3472
3473         spin_lock_irqsave(&priv->lock, flags);
3474         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3475                 spin_unlock_irqrestore(&priv->lock, flags);
3476                 return 0;
3477         }
3478         memcpy(&measure_report, &priv->measure_report, size);
3479         priv->measurement_status = 0;
3480         spin_unlock_irqrestore(&priv->lock, flags);
3481
3482         while (size && (PAGE_SIZE - len)) {
3483                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3484                                    PAGE_SIZE - len, 1);
3485                 len = strlen(buf);
3486                 if (PAGE_SIZE - len)
3487                         buf[len++] = '\n';
3488
3489                 ofs += 16;
3490                 size -= min(size, 16U);
3491         }
3492
3493         return len;
3494 }
3495
3496 static ssize_t store_measurement(struct device *d,
3497                                  struct device_attribute *attr,
3498                                  const char *buf, size_t count)
3499 {
3500         struct iwl_priv *priv = dev_get_drvdata(d);
3501         struct ieee80211_measurement_params params = {
3502                 .channel = le16_to_cpu(priv->active_rxon.channel),
3503                 .start_time = cpu_to_le64(priv->last_tsf),
3504                 .duration = cpu_to_le16(1),
3505         };
3506         u8 type = IWL_MEASURE_BASIC;
3507         u8 buffer[32];
3508         u8 channel;
3509
3510         if (count) {
3511                 char *p = buffer;
3512                 strncpy(buffer, buf, min(sizeof(buffer), count));
3513                 channel = simple_strtoul(p, NULL, 0);
3514                 if (channel)
3515                         params.channel = channel;
3516
3517                 p = buffer;
3518                 while (*p && *p != ' ')
3519                         p++;
3520                 if (*p)
3521                         type = simple_strtoul(p + 1, NULL, 0);
3522         }
3523
3524         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3525                        "channel %d (for '%s')\n", type, params.channel, buf);
3526         iwl3945_get_measurement(priv, &params, type);
3527
3528         return count;
3529 }
3530
3531 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3532                    show_measurement, store_measurement);
3533 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3534
3535 static ssize_t store_retry_rate(struct device *d,
3536                                 struct device_attribute *attr,
3537                                 const char *buf, size_t count)
3538 {
3539         struct iwl_priv *priv = dev_get_drvdata(d);
3540
3541         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3542         if (priv->retry_rate <= 0)
3543                 priv->retry_rate = 1;
3544
3545         return count;
3546 }
3547
3548 static ssize_t show_retry_rate(struct device *d,
3549                                struct device_attribute *attr, char *buf)
3550 {
3551         struct iwl_priv *priv = dev_get_drvdata(d);
3552         return sprintf(buf, "%d", priv->retry_rate);
3553 }
3554
3555 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3556                    store_retry_rate);
3557
3558
3559 static ssize_t show_channels(struct device *d,
3560                              struct device_attribute *attr, char *buf)
3561 {
3562         /* all this shit doesn't belong into sysfs anyway */
3563         return 0;
3564 }
3565
3566 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3567
3568 static ssize_t show_statistics(struct device *d,
3569                                struct device_attribute *attr, char *buf)
3570 {
3571         struct iwl_priv *priv = dev_get_drvdata(d);
3572         u32 size = sizeof(struct iwl3945_notif_statistics);
3573         u32 len = 0, ofs = 0;
3574         u8 *data = (u8 *)&priv->statistics_39;
3575         int rc = 0;
3576
3577         if (!iwl_is_alive(priv))
3578                 return -EAGAIN;
3579
3580         mutex_lock(&priv->mutex);
3581         rc = iwl_send_statistics_request(priv, 0);
3582         mutex_unlock(&priv->mutex);
3583
3584         if (rc) {
3585                 len = sprintf(buf,
3586                               "Error sending statistics request: 0x%08X\n", rc);
3587                 return len;
3588         }
3589
3590         while (size && (PAGE_SIZE - len)) {
3591                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3592                                    PAGE_SIZE - len, 1);
3593                 len = strlen(buf);
3594                 if (PAGE_SIZE - len)
3595                         buf[len++] = '\n';
3596
3597                 ofs += 16;
3598                 size -= min(size, 16U);
3599         }
3600
3601         return len;
3602 }
3603
3604 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3605
3606 static ssize_t show_antenna(struct device *d,
3607                             struct device_attribute *attr, char *buf)
3608 {
3609         struct iwl_priv *priv = dev_get_drvdata(d);
3610
3611         if (!iwl_is_alive(priv))
3612                 return -EAGAIN;
3613
3614         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3615 }
3616
3617 static ssize_t store_antenna(struct device *d,
3618                              struct device_attribute *attr,
3619                              const char *buf, size_t count)
3620 {
3621         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3622         int ant;
3623
3624         if (count == 0)
3625                 return 0;
3626
3627         if (sscanf(buf, "%1i", &ant) != 1) {
3628                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3629                 return count;
3630         }
3631
3632         if ((ant >= 0) && (ant <= 2)) {
3633                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3634                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3635         } else
3636                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3637
3638
3639         return count;
3640 }
3641
3642 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3643
3644 static ssize_t show_status(struct device *d,
3645                            struct device_attribute *attr, char *buf)
3646 {
3647         struct iwl_priv *priv = dev_get_drvdata(d);
3648         if (!iwl_is_alive(priv))
3649                 return -EAGAIN;
3650         return sprintf(buf, "0x%08x\n", (int)priv->status);
3651 }
3652
3653 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3654
3655 static ssize_t dump_error_log(struct device *d,
3656                               struct device_attribute *attr,
3657                               const char *buf, size_t count)
3658 {
3659         struct iwl_priv *priv = dev_get_drvdata(d);
3660         char *p = (char *)buf;
3661
3662         if (p[0] == '1')
3663                 iwl3945_dump_nic_error_log(priv);
3664
3665         return strnlen(buf, count);
3666 }
3667
3668 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3669
3670 static ssize_t dump_event_log(struct device *d,
3671                               struct device_attribute *attr,
3672                               const char *buf, size_t count)
3673 {
3674         struct iwl_priv *priv = dev_get_drvdata(d);
3675         char *p = (char *)buf;
3676
3677         if (p[0] == '1')
3678                 iwl3945_dump_nic_event_log(priv);
3679
3680         return strnlen(buf, count);
3681 }
3682
3683 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
3684
3685 /*****************************************************************************
3686  *
3687  * driver setup and tear down
3688  *
3689  *****************************************************************************/
3690
3691 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3692 {
3693         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3694
3695         init_waitqueue_head(&priv->wait_command_queue);
3696
3697         INIT_WORK(&priv->up, iwl3945_bg_up);
3698         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3699         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3700         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3701         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3702         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3703         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3704         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3705         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3706         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3707         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3708
3709         iwl3945_hw_setup_deferred_work(priv);
3710
3711         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3712                      iwl3945_irq_tasklet, (unsigned long)priv);
3713 }
3714
3715 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3716 {
3717         iwl3945_hw_cancel_deferred_work(priv);
3718
3719         cancel_delayed_work_sync(&priv->init_alive_start);
3720         cancel_delayed_work(&priv->scan_check);
3721         cancel_delayed_work(&priv->alive_start);
3722         cancel_work_sync(&priv->beacon_update);
3723 }
3724
3725 static struct attribute *iwl3945_sysfs_entries[] = {
3726         &dev_attr_antenna.attr,
3727         &dev_attr_channels.attr,
3728         &dev_attr_dump_errors.attr,
3729         &dev_attr_dump_events.attr,
3730         &dev_attr_flags.attr,
3731         &dev_attr_filter_flags.attr,
3732 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3733         &dev_attr_measurement.attr,
3734 #endif
3735         &dev_attr_retry_rate.attr,
3736         &dev_attr_statistics.attr,
3737         &dev_attr_status.attr,
3738         &dev_attr_temperature.attr,
3739         &dev_attr_tx_power.attr,
3740 #ifdef CONFIG_IWLWIFI_DEBUG
3741         &dev_attr_debug_level.attr,
3742 #endif
3743         NULL
3744 };
3745
3746 static struct attribute_group iwl3945_attribute_group = {
3747         .name = NULL,           /* put in device directory */
3748         .attrs = iwl3945_sysfs_entries,
3749 };
3750
3751 static struct ieee80211_ops iwl3945_hw_ops = {
3752         .tx = iwl3945_mac_tx,
3753         .start = iwl3945_mac_start,
3754         .stop = iwl3945_mac_stop,
3755         .add_interface = iwl_mac_add_interface,
3756         .remove_interface = iwl_mac_remove_interface,
3757         .config = iwl_mac_config,
3758         .configure_filter = iwl_configure_filter,
3759         .set_key = iwl3945_mac_set_key,
3760         .get_tx_stats = iwl_mac_get_tx_stats,
3761         .conf_tx = iwl_mac_conf_tx,
3762         .reset_tsf = iwl_mac_reset_tsf,
3763         .bss_info_changed = iwl_bss_info_changed,
3764         .hw_scan = iwl_mac_hw_scan
3765 };
3766
3767 static int iwl3945_init_drv(struct iwl_priv *priv)
3768 {
3769         int ret;
3770         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3771
3772         priv->retry_rate = 1;
3773         priv->ibss_beacon = NULL;
3774
3775         spin_lock_init(&priv->lock);
3776         spin_lock_init(&priv->sta_lock);
3777         spin_lock_init(&priv->hcmd_lock);
3778
3779         INIT_LIST_HEAD(&priv->free_frames);
3780
3781         mutex_init(&priv->mutex);
3782
3783         /* Clear the driver's (not device's) station table */
3784         iwl_clear_stations_table(priv);
3785
3786         priv->data_retry_limit = -1;
3787         priv->ieee_channels = NULL;
3788         priv->ieee_rates = NULL;
3789         priv->band = IEEE80211_BAND_2GHZ;
3790
3791         priv->iw_mode = NL80211_IFTYPE_STATION;
3792
3793         iwl_reset_qos(priv);
3794
3795         priv->qos_data.qos_active = 0;
3796         priv->qos_data.qos_cap.val = 0;
3797
3798         priv->rates_mask = IWL_RATES_MASK;
3799         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3800
3801         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3802                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3803                          eeprom->version);
3804                 ret = -EINVAL;
3805                 goto err;
3806         }
3807         ret = iwl_init_channel_map(priv);
3808         if (ret) {
3809                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3810                 goto err;
3811         }
3812
3813         /* Set up txpower settings in driver for all channels */
3814         if (iwl3945_txpower_set_from_eeprom(priv)) {
3815                 ret = -EIO;
3816                 goto err_free_channel_map;
3817         }
3818
3819         ret = iwlcore_init_geos(priv);
3820         if (ret) {
3821                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3822                 goto err_free_channel_map;
3823         }
3824         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3825
3826         return 0;
3827
3828 err_free_channel_map:
3829         iwl_free_channel_map(priv);
3830 err:
3831         return ret;
3832 }
3833
3834 static int iwl3945_setup_mac(struct iwl_priv *priv)
3835 {
3836         int ret;
3837         struct ieee80211_hw *hw = priv->hw;
3838
3839         hw->rate_control_algorithm = "iwl-3945-rs";
3840         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3841
3842         /* Tell mac80211 our characteristics */
3843         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3844                     IEEE80211_HW_NOISE_DBM |
3845                     IEEE80211_HW_SPECTRUM_MGMT |
3846                     IEEE80211_HW_SUPPORTS_PS |
3847                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3848
3849         hw->wiphy->interface_modes =
3850                 BIT(NL80211_IFTYPE_STATION) |
3851                 BIT(NL80211_IFTYPE_ADHOC);
3852
3853         hw->wiphy->custom_regulatory = true;
3854
3855         /* Firmware does not support this */
3856         hw->wiphy->disable_beacon_hints = true;
3857
3858         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3859         /* we create the 802.11 header and a zero-length SSID element */
3860         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3861
3862         /* Default value; 4 EDCA QOS priorities */
3863         hw->queues = 4;
3864
3865         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3866                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3867                         &priv->bands[IEEE80211_BAND_2GHZ];
3868
3869         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3870                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3871                         &priv->bands[IEEE80211_BAND_5GHZ];
3872
3873         ret = ieee80211_register_hw(priv->hw);
3874         if (ret) {
3875                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3876                 return ret;
3877         }
3878         priv->mac80211_registered = 1;
3879
3880         return 0;
3881 }
3882
3883 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3884 {
3885         int err = 0;
3886         struct iwl_priv *priv;
3887         struct ieee80211_hw *hw;
3888         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3889         struct iwl3945_eeprom *eeprom;
3890         unsigned long flags;
3891
3892         /***********************
3893          * 1. Allocating HW data
3894          * ********************/
3895
3896         /* mac80211 allocates memory for this device instance, including
3897          *   space for this driver's private structure */
3898         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3899         if (hw == NULL) {
3900                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3901                 err = -ENOMEM;
3902                 goto out;
3903         }
3904         priv = hw->priv;
3905         SET_IEEE80211_DEV(hw, &pdev->dev);
3906
3907         /*
3908          * Disabling hardware scan means that mac80211 will perform scans
3909          * "the hard way", rather than using device's scan.
3910          */
3911         if (iwl3945_mod_params.disable_hw_scan) {
3912                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3913                 iwl3945_hw_ops.hw_scan = NULL;
3914         }
3915
3916
3917         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3918         priv->cfg = cfg;
3919         priv->pci_dev = pdev;
3920         priv->inta_mask = CSR_INI_SET_MASK;
3921
3922 #ifdef CONFIG_IWLWIFI_DEBUG
3923         atomic_set(&priv->restrict_refcnt, 0);
3924 #endif
3925         if (iwl_alloc_traffic_mem(priv))
3926                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3927
3928         /***************************
3929          * 2. Initializing PCI bus
3930          * *************************/
3931         if (pci_enable_device(pdev)) {
3932                 err = -ENODEV;
3933                 goto out_ieee80211_free_hw;
3934         }
3935
3936         pci_set_master(pdev);
3937
3938         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3939         if (!err)
3940                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3941         if (err) {
3942                 IWL_WARN(priv, "No suitable DMA available.\n");
3943                 goto out_pci_disable_device;
3944         }
3945
3946         pci_set_drvdata(pdev, priv);
3947         err = pci_request_regions(pdev, DRV_NAME);
3948         if (err)
3949                 goto out_pci_disable_device;
3950
3951         /***********************
3952          * 3. Read REV Register
3953          * ********************/
3954         priv->hw_base = pci_iomap(pdev, 0, 0);
3955         if (!priv->hw_base) {
3956                 err = -ENODEV;
3957                 goto out_pci_release_regions;
3958         }
3959
3960         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3961                         (unsigned long long) pci_resource_len(pdev, 0));
3962         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3963
3964         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3965          * PCI Tx retries from interfering with C3 CPU state */
3966         pci_write_config_byte(pdev, 0x41, 0x00);
3967
3968         /* this spin lock will be used in apm_ops.init and EEPROM access
3969          * we should init now
3970          */
3971         spin_lock_init(&priv->reg_lock);
3972
3973         /* amp init */
3974         err = priv->cfg->ops->lib->apm_ops.init(priv);
3975         if (err < 0) {
3976                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
3977                 goto out_iounmap;
3978         }
3979
3980         /***********************
3981          * 4. Read EEPROM
3982          * ********************/
3983
3984         /* Read the EEPROM */
3985         err = iwl_eeprom_init(priv);
3986         if (err) {
3987                 IWL_ERR(priv, "Unable to init EEPROM\n");
3988                 goto out_iounmap;
3989         }
3990         /* MAC Address location in EEPROM same for 3945/4965 */
3991         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3992         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
3993         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3994         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3995
3996         /***********************
3997          * 5. Setup HW Constants
3998          * ********************/
3999         /* Device-specific setup */
4000         if (iwl3945_hw_set_hw_params(priv)) {
4001                 IWL_ERR(priv, "failed to set hw settings\n");
4002                 goto out_eeprom_free;
4003         }
4004
4005         /***********************
4006          * 6. Setup priv
4007          * ********************/
4008
4009         err = iwl3945_init_drv(priv);
4010         if (err) {
4011                 IWL_ERR(priv, "initializing driver failed\n");
4012                 goto out_unset_hw_params;
4013         }
4014
4015         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4016                 priv->cfg->name);
4017
4018         /***********************
4019          * 7. Setup Services
4020          * ********************/
4021
4022         spin_lock_irqsave(&priv->lock, flags);
4023         iwl_disable_interrupts(priv);
4024         spin_unlock_irqrestore(&priv->lock, flags);
4025
4026         pci_enable_msi(priv->pci_dev);
4027
4028         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4029                           IRQF_SHARED, DRV_NAME, priv);
4030         if (err) {
4031                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4032                 goto out_disable_msi;
4033         }
4034
4035         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4036         if (err) {
4037                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4038                 goto out_release_irq;
4039         }
4040
4041         iwl_set_rxon_channel(priv,
4042                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4043         iwl3945_setup_deferred_work(priv);
4044         iwl3945_setup_rx_handlers(priv);
4045
4046         /*********************************
4047          * 8. Setup and Register mac80211
4048          * *******************************/
4049
4050         iwl_enable_interrupts(priv);
4051
4052         err = iwl3945_setup_mac(priv);
4053         if (err)
4054                 goto  out_remove_sysfs;
4055
4056         err = iwl_dbgfs_register(priv, DRV_NAME);
4057         if (err)
4058                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4059
4060         /* Start monitoring the killswitch */
4061         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4062                            2 * HZ);
4063
4064         return 0;
4065
4066  out_remove_sysfs:
4067         destroy_workqueue(priv->workqueue);
4068         priv->workqueue = NULL;
4069         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4070  out_release_irq:
4071         free_irq(priv->pci_dev->irq, priv);
4072  out_disable_msi:
4073         pci_disable_msi(priv->pci_dev);
4074         iwlcore_free_geos(priv);
4075         iwl_free_channel_map(priv);
4076  out_unset_hw_params:
4077         iwl3945_unset_hw_params(priv);
4078  out_eeprom_free:
4079         iwl_eeprom_free(priv);
4080  out_iounmap:
4081         pci_iounmap(pdev, priv->hw_base);
4082  out_pci_release_regions:
4083         pci_release_regions(pdev);
4084  out_pci_disable_device:
4085         pci_set_drvdata(pdev, NULL);
4086         pci_disable_device(pdev);
4087  out_ieee80211_free_hw:
4088         ieee80211_free_hw(priv->hw);
4089         iwl_free_traffic_mem(priv);
4090  out:
4091         return err;
4092 }
4093
4094 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4095 {
4096         struct iwl_priv *priv = pci_get_drvdata(pdev);
4097         unsigned long flags;
4098
4099         if (!priv)
4100                 return;
4101
4102         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4103
4104         iwl_dbgfs_unregister(priv);
4105
4106         set_bit(STATUS_EXIT_PENDING, &priv->status);
4107
4108         if (priv->mac80211_registered) {
4109                 ieee80211_unregister_hw(priv->hw);
4110                 priv->mac80211_registered = 0;
4111         } else {
4112                 iwl3945_down(priv);
4113         }
4114
4115         /* make sure we flush any pending irq or
4116          * tasklet for the driver
4117          */
4118         spin_lock_irqsave(&priv->lock, flags);
4119         iwl_disable_interrupts(priv);
4120         spin_unlock_irqrestore(&priv->lock, flags);
4121
4122         iwl_synchronize_irq(priv);
4123
4124         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4125
4126         cancel_delayed_work_sync(&priv->rfkill_poll);
4127
4128         iwl3945_dealloc_ucode_pci(priv);
4129
4130         if (priv->rxq.bd)
4131                 iwl3945_rx_queue_free(priv, &priv->rxq);
4132         iwl3945_hw_txq_ctx_free(priv);
4133
4134         iwl3945_unset_hw_params(priv);
4135         iwl_clear_stations_table(priv);
4136
4137         /*netif_stop_queue(dev); */
4138         flush_workqueue(priv->workqueue);
4139
4140         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4141          * priv->workqueue... so we can't take down the workqueue
4142          * until now... */
4143         destroy_workqueue(priv->workqueue);
4144         priv->workqueue = NULL;
4145         iwl_free_traffic_mem(priv);
4146
4147         free_irq(pdev->irq, priv);
4148         pci_disable_msi(pdev);
4149
4150         pci_iounmap(pdev, priv->hw_base);
4151         pci_release_regions(pdev);
4152         pci_disable_device(pdev);
4153         pci_set_drvdata(pdev, NULL);
4154
4155         iwl_free_channel_map(priv);
4156         iwlcore_free_geos(priv);
4157         kfree(priv->scan);
4158         if (priv->ibss_beacon)
4159                 dev_kfree_skb(priv->ibss_beacon);
4160
4161         ieee80211_free_hw(priv->hw);
4162 }
4163
4164
4165 /*****************************************************************************
4166  *
4167  * driver and module entry point
4168  *
4169  *****************************************************************************/
4170
4171 static struct pci_driver iwl3945_driver = {
4172         .name = DRV_NAME,
4173         .id_table = iwl3945_hw_card_ids,
4174         .probe = iwl3945_pci_probe,
4175         .remove = __devexit_p(iwl3945_pci_remove),
4176 #ifdef CONFIG_PM
4177         .suspend = iwl_pci_suspend,
4178         .resume = iwl_pci_resume,
4179 #endif
4180 };
4181
4182 static int __init iwl3945_init(void)
4183 {
4184
4185         int ret;
4186         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4187         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4188
4189         ret = iwl3945_rate_control_register();
4190         if (ret) {
4191                 printk(KERN_ERR DRV_NAME
4192                        "Unable to register rate control algorithm: %d\n", ret);
4193                 return ret;
4194         }
4195
4196         ret = pci_register_driver(&iwl3945_driver);
4197         if (ret) {
4198                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4199                 goto error_register;
4200         }
4201
4202         return ret;
4203
4204 error_register:
4205         iwl3945_rate_control_unregister();
4206         return ret;
4207 }
4208
4209 static void __exit iwl3945_exit(void)
4210 {
4211         pci_unregister_driver(&iwl3945_driver);
4212         iwl3945_rate_control_unregister();
4213 }
4214
4215 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4216
4217 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4218 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4219 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4220 MODULE_PARM_DESC(swcrypto,
4221                  "using software crypto (default 1 [software])\n");
4222 #ifdef CONFIG_IWLWIFI_DEBUG
4223 module_param_named(debug, iwl_debug_level, uint, 0644);
4224 MODULE_PARM_DESC(debug, "debug output mask");
4225 #endif
4226 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4227 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4228 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4229 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4230
4231 module_exit(iwl3945_exit);
4232 module_init(iwl3945_init);