git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/lib80211.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-helpers.h"
  57 #include "iwl-core.h"
  58 #include "iwl-dev.h"
  59
  60 /*
  61  * module name, copyright, version, etc.
  62  */
  63
  64 #define DRV_DESCRIPTION \
  65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 #define VD "d"
  69 #else
  70 #define VD
  71 #endif
  72
  73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  74 #define VS "s"
  75 #else
  76 #define VS
  77 #endif
  78
  79 #define IWL39_VERSION "1.2.26k" VD VS
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82 #define DRV_VERSION     IWL39_VERSION
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89
  90  /* module parameters */
  91 struct iwl_mod_params iwl3945_mod_params = {
  92         .num_of_queues = IWL39_MAX_NUM_QUEUES,
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /**
  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 #define MAX_UCODE_BEACON_INTERVAL       1024
 365 #define INTEL_CONN_LISTEN_INTERVAL      cpu_to_le16(0xA)
 366
 367 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
 368 {
 369         u16 new_val = 0;
 370         u16 beacon_factor = 0;
 371
 372         beacon_factor =
 373             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 374                 / MAX_UCODE_BEACON_INTERVAL;
 375         new_val = beacon_val / beacon_factor;
 376
 377         return cpu_to_le16(new_val);
 378 }
 379
 380 static void iwl3945_setup_rxon_timing(struct iwl_priv *priv)
 381 {
 382         u64 interval_tm_unit;
 383         u64 tsf, result;
 384         unsigned long flags;
 385         struct ieee80211_conf *conf = NULL;
 386         u16 beacon_int = 0;
 387
 388         conf = ieee80211_get_hw_conf(priv->hw);
 389
 390         spin_lock_irqsave(&priv->lock, flags);
 391         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 392         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
 393
 394         tsf = priv->timestamp;
 395
 396         beacon_int = priv->beacon_int;
 397         spin_unlock_irqrestore(&priv->lock, flags);
 398
 399         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 400                 if (beacon_int == 0) {
 401                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
 402                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
 403                 } else {
 404                         priv->rxon_timing.beacon_interval =
 405                                 cpu_to_le16(beacon_int);
 406                         priv->rxon_timing.beacon_interval =
 407                             iwl3945_adjust_beacon_interval(
 408                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 409                 }
 410
 411                 priv->rxon_timing.atim_window = 0;
 412         } else {
 413                 priv->rxon_timing.beacon_interval =
 414                         iwl3945_adjust_beacon_interval(
 415                                 priv->vif->bss_conf.beacon_int);
 416                 /* TODO: we need to get atim_window from upper stack
 417                  * for now we set to 0 */
 418                 priv->rxon_timing.atim_window = 0;
 419         }
 420
 421         interval_tm_unit =
 422                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
 423         result = do_div(tsf, interval_tm_unit);
 424         priv->rxon_timing.beacon_init_val =
 425             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
 426
 427         IWL_DEBUG_ASSOC(priv,
 428                 "beacon interval %d beacon timer %d beacon tim %d\n",
 429                 le16_to_cpu(priv->rxon_timing.beacon_interval),
 430                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
 431                 le16_to_cpu(priv->rxon_timing.atim_window));
 432 }
 433
 434 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 435                                       struct ieee80211_tx_info *info,
 436                                       struct iwl_cmd *cmd,
 437                                       struct sk_buff *skb_frag,
 438                                       int sta_id)
 439 {
 440         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 441         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 442
 443         switch (keyinfo->alg) {
 444         case ALG_CCMP:
 445                 tx->sec_ctl = TX_CMD_SEC_CCM;
 446                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 447                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 448                 break;
 449
 450         case ALG_TKIP:
 451                 break;
 452
 453         case ALG_WEP:
 454                 tx->sec_ctl = TX_CMD_SEC_WEP |
 455                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 456
 457                 if (keyinfo->keylen == 13)
 458                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 459
 460                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 461
 462                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 463                              "with key %d\n", info->control.hw_key->hw_key_idx);
 464                 break;
 465
 466         default:
 467                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 468                 break;
 469         }
 470 }
 471
 472 /*
 473  * handle build REPLY_TX command notification.
 474  */
 475 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 476                                   struct iwl_cmd *cmd,
 477                                   struct ieee80211_tx_info *info,
 478                                   struct ieee80211_hdr *hdr, u8 std_id)
 479 {
 480         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 481         __le32 tx_flags = tx->tx_flags;
 482         __le16 fc = hdr->frame_control;
 483         u8 rc_flags = info->control.rates[0].flags;
 484
 485         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 486         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 487                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 488                 if (ieee80211_is_mgmt(fc))
 489                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 490                 if (ieee80211_is_probe_resp(fc) &&
 491                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 492                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 493         } else {
 494                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 495                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 496         }
 497
 498         tx->sta_id = std_id;
 499         if (ieee80211_has_morefrags(fc))
 500                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 501
 502         if (ieee80211_is_data_qos(fc)) {
 503                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 504                 tx->tid_tspec = qc[0] & 0xf;
 505                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 506         } else {
 507                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 508         }
 509
 510         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 511                 tx_flags |= TX_CMD_FLG_RTS_MSK;
 512                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 513         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 514                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 515                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 516         }
 517
 518         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 519                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 520
 521         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 522         if (ieee80211_is_mgmt(fc)) {
 523                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 524                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
 525                 else
 526                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
 527         } else {
 528                 tx->timeout.pm_frame_timeout = 0;
 529 #ifdef CONFIG_IWLWIFI_LEDS
 530                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
 531 #endif
 532         }
 533
 534         tx->driver_txop = 0;
 535         tx->tx_flags = tx_flags;
 536         tx->next_frame_len = 0;
 537 }
 538
 539 /*
 540  * start REPLY_TX command process
 541  */
 542 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 543 {
 544         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 545         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 546         struct iwl3945_tx_cmd *tx;
 547         struct iwl_tx_queue *txq = NULL;
 548         struct iwl_queue *q = NULL;
 549         struct iwl_cmd *out_cmd = NULL;
 550         dma_addr_t phys_addr;
 551         dma_addr_t txcmd_phys;
 552         int txq_id = skb_get_queue_mapping(skb);
 553         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 554         u8 id;
 555         u8 unicast;
 556         u8 sta_id;
 557         u8 tid = 0;
 558         u16 seq_number = 0;
 559         __le16 fc;
 560         u8 wait_write_ptr = 0;
 561         u8 *qc = NULL;
 562         unsigned long flags;
 563         int rc;
 564
 565         spin_lock_irqsave(&priv->lock, flags);
 566         if (iwl_is_rfkill(priv)) {
 567                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 568                 goto drop_unlock;
 569         }
 570
 571         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 572                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 573                 goto drop_unlock;
 574         }
 575
 576         unicast = !is_multicast_ether_addr(hdr->addr1);
 577         id = 0;
 578
 579         fc = hdr->frame_control;
 580
 581 #ifdef CONFIG_IWLWIFI_DEBUG
 582         if (ieee80211_is_auth(fc))
 583                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 584         else if (ieee80211_is_assoc_req(fc))
 585                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 586         else if (ieee80211_is_reassoc_req(fc))
 587                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 588 #endif
 589
 590         /* drop all data frame if we are not associated */
 591         if (ieee80211_is_data(fc) &&
 592             (!iwl_is_monitor_mode(priv)) && /* packet injection */
 593             (!iwl_is_associated(priv) ||
 594              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 595                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 596                 goto drop_unlock;
 597         }
 598
 599         spin_unlock_irqrestore(&priv->lock, flags);
 600
 601         hdr_len = ieee80211_hdrlen(fc);
 602
 603         /* Find (or create) index into station table for destination station */
 604         sta_id = iwl_get_sta_id(priv, hdr);
 605         if (sta_id == IWL_INVALID_STATION) {
 606                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 607                                hdr->addr1);
 608                 goto drop;
 609         }
 610
 611         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 612
 613         if (ieee80211_is_data_qos(fc)) {
 614                 qc = ieee80211_get_qos_ctl(hdr);
 615                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 616                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 617                                 IEEE80211_SCTL_SEQ;
 618                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 619                         (hdr->seq_ctrl &
 620                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 621                 seq_number += 0x10;
 622         }
 623
 624         /* Descriptor for chosen Tx queue */
 625         txq = &priv->txq[txq_id];
 626         q = &txq->q;
 627
 628         spin_lock_irqsave(&priv->lock, flags);
 629
 630         idx = get_cmd_index(q, q->write_ptr, 0);
 631
 632         /* Set up driver data for this TFD */
 633         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 634         txq->txb[q->write_ptr].skb[0] = skb;
 635
 636         /* Init first empty entry in queue's array of Tx/cmd buffers */
 637         out_cmd = txq->cmd[idx];
 638         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 639         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 640         memset(tx, 0, sizeof(*tx));
 641
 642         /*
 643          * Set up the Tx-command (not MAC!) header.
 644          * Store the chosen Tx queue and TFD index within the sequence field;
 645          * after Tx, uCode's Tx response will return this value so driver can
 646          * locate the frame within the tx queue and do post-tx processing.
 647          */
 648         out_cmd->hdr.cmd = REPLY_TX;
 649         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 650                                 INDEX_TO_SEQ(q->write_ptr)));
 651
 652         /* Copy MAC header from skb into command buffer */
 653         memcpy(tx->hdr, hdr, hdr_len);
 654
 655
 656         if (info->control.hw_key)
 657                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 658
 659         /* TODO need this for burst mode later on */
 660         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 661
 662         /* set is_hcca to 0; it probably will never be implemented */
 663         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 664
 665         /* Total # bytes to be transmitted */
 666         len = (u16)skb->len;
 667         tx->len = cpu_to_le16(len);
 668
 669
 670         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 671         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 672
 673         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 674                 txq->need_update = 1;
 675                 if (qc)
 676                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 677         } else {
 678                 wait_write_ptr = 1;
 679                 txq->need_update = 0;
 680         }
 681
 682         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 683                      le16_to_cpu(out_cmd->hdr.sequence));
 684         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 685         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 686         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 687                            ieee80211_hdrlen(fc));
 688
 689         /*
 690          * Use the first empty entry in this queue's command buffer array
 691          * to contain the Tx command and MAC header concatenated together
 692          * (payload data will be in another buffer).
 693          * Size of this varies, due to varying MAC header length.
 694          * If end is not dword aligned, we'll have 2 extra bytes at the end
 695          * of the MAC header (device reads on dword boundaries).
 696          * We'll tell device about this padding later.
 697          */
 698         len = sizeof(struct iwl3945_tx_cmd) +
 699                         sizeof(struct iwl_cmd_header) + hdr_len;
 700
 701         len_org = len;
 702         len = (len + 3) & ~3;
 703
 704         if (len_org != len)
 705                 len_org = 1;
 706         else
 707                 len_org = 0;
 708
 709         /* Physical address of this Tx command's header (not MAC header!),
 710          * within command buffer array. */
 711         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 712                                     len, PCI_DMA_TODEVICE);
 713         /* we do not map meta data ... so we can safely access address to
 714          * provide to unmap command*/
 715         pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys);
 716         pci_unmap_len_set(&out_cmd->meta, len, len);
 717
 718         /* Add buffer containing Tx command and MAC(!) header to TFD's
 719          * first entry */
 720         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 721                                                    txcmd_phys, len, 1, 0);
 722
 723
 724         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 725          * if any (802.11 null frames have no payload). */
 726         len = skb->len - hdr_len;
 727         if (len) {
 728                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 729                                            len, PCI_DMA_TODEVICE);
 730                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 731                                                            phys_addr, len,
 732                                                            0, U32_PAD(len));
 733         }
 734
 735
 736         /* Tell device the write index *just past* this latest filled TFD */
 737         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 738         rc = iwl_txq_update_write_ptr(priv, txq);
 739         spin_unlock_irqrestore(&priv->lock, flags);
 740
 741         if (rc)
 742                 return rc;
 743
 744         if ((iwl_queue_space(q) < q->high_mark)
 745             && priv->mac80211_registered) {
 746                 if (wait_write_ptr) {
 747                         spin_lock_irqsave(&priv->lock, flags);
 748                         txq->need_update = 1;
 749                         iwl_txq_update_write_ptr(priv, txq);
 750                         spin_unlock_irqrestore(&priv->lock, flags);
 751                 }
 752
 753                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 754         }
 755
 756         return 0;
 757
 758 drop_unlock:
 759         spin_unlock_irqrestore(&priv->lock, flags);
 760 drop:
 761         return -1;
 762 }
 763
 764 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 765
 766 #include "iwl-spectrum.h"
 767
 768 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 769 #define BEACON_TIME_MASK_HIGH   0xFF000000
 770 #define TIME_UNIT               1024
 771
 772 /*
 773  * extended beacon time format
 774  * time in usec will be changed into a 32-bit value in 8:24 format
 775  * the high 1 byte is the beacon counts
 776  * the lower 3 bytes is the time in usec within one beacon interval
 777  */
 778
 779 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 780 {
 781         u32 quot;
 782         u32 rem;
 783         u32 interval = beacon_interval * 1024;
 784
 785         if (!interval || !usec)
 786                 return 0;
 787
 788         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 789         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 790
 791         return (quot << 24) + rem;
 792 }
 793
 794 /* base is usually what we get from ucode with each received frame,
 795  * the same as HW timer counter counting down
 796  */
 797
 798 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 799 {
 800         u32 base_low = base & BEACON_TIME_MASK_LOW;
 801         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 802         u32 interval = beacon_interval * TIME_UNIT;
 803         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 804             (addon & BEACON_TIME_MASK_HIGH);
 805
 806         if (base_low > addon_low)
 807                 res += base_low - addon_low;
 808         else if (base_low < addon_low) {
 809                 res += interval + base_low - addon_low;
 810                 res += (1 << 24);
 811         } else
 812                 res += (1 << 24);
 813
 814         return cpu_to_le32(res);
 815 }
 816
 817 static int iwl3945_get_measurement(struct iwl_priv *priv,
 818                                struct ieee80211_measurement_params *params,
 819                                u8 type)
 820 {
 821         struct iwl_spectrum_cmd spectrum;
 822         struct iwl_rx_packet *res;
 823         struct iwl_host_cmd cmd = {
 824                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 825                 .data = (void *)&spectrum,
 826                 .meta.flags = CMD_WANT_SKB,
 827         };
 828         u32 add_time = le64_to_cpu(params->start_time);
 829         int rc;
 830         int spectrum_resp_status;
 831         int duration = le16_to_cpu(params->duration);
 832
 833         if (iwl_is_associated(priv))
 834                 add_time =
 835                     iwl3945_usecs_to_beacons(
 836                         le64_to_cpu(params->start_time) - priv->last_tsf,
 837                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 838
 839         memset(&spectrum, 0, sizeof(spectrum));
 840
 841         spectrum.channel_count = cpu_to_le16(1);
 842         spectrum.flags =
 843             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 844         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 845         cmd.len = sizeof(spectrum);
 846         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 847
 848         if (iwl_is_associated(priv))
 849                 spectrum.start_time =
 850                     iwl3945_add_beacon_time(priv->last_beacon_time,
 851                                 add_time,
 852                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 853         else
 854                 spectrum.start_time = 0;
 855
 856         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 857         spectrum.channels[0].channel = params->channel;
 858         spectrum.channels[0].type = type;
 859         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 860                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 861                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 862
 863         rc = iwl_send_cmd_sync(priv, &cmd);
 864         if (rc)
 865                 return rc;
 866
 867         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 868         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 869                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 870                 rc = -EIO;
 871         }
 872
 873         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
 874         switch (spectrum_resp_status) {
 875         case 0:         /* Command will be handled */
 876                 if (res->u.spectrum.id != 0xff) {
 877                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 878                                                 res->u.spectrum.id);
 879                         priv->measurement_status &= ~MEASUREMENT_READY;
 880                 }
 881                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 882                 rc = 0;
 883                 break;
 884
 885         case 1:         /* Command will not be handled */
 886                 rc = -EAGAIN;
 887                 break;
 888         }
 889
 890         dev_kfree_skb_any(cmd.meta.u.skb);
 891
 892         return rc;
 893 }
 894 #endif
 895
 896 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 897                                struct iwl_rx_mem_buffer *rxb)
 898 {
 899         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 900         struct iwl_alive_resp *palive;
 901         struct delayed_work *pwork;
 902
 903         palive = &pkt->u.alive_frame;
 904
 905         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 906                        "0x%01X 0x%01X\n",
 907                        palive->is_valid, palive->ver_type,
 908                        palive->ver_subtype);
 909
 910         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 911                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 912                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 913                        sizeof(struct iwl_alive_resp));
 914                 pwork = &priv->init_alive_start;
 915         } else {
 916                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 917                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 918                        sizeof(struct iwl_alive_resp));
 919                 pwork = &priv->alive_start;
 920                 iwl3945_disable_events(priv);
 921         }
 922
 923         /* We delay the ALIVE response by 5ms to
 924          * give the HW RF Kill time to activate... */
 925         if (palive->is_valid == UCODE_VALID_OK)
 926                 queue_delayed_work(priv->workqueue, pwork,
 927                                    msecs_to_jiffies(5));
 928         else
 929                 IWL_WARN(priv, "uCode did not respond OK.\n");
 930 }
 931
 932 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 933                                  struct iwl_rx_mem_buffer *rxb)
 934 {
 935 #ifdef CONFIG_IWLWIFI_DEBUG
 936         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 937 #endif
 938
 939         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 940         return;
 941 }
 942
 943 static void iwl3945_bg_beacon_update(struct work_struct *work)
 944 {
 945         struct iwl_priv *priv =
 946                 container_of(work, struct iwl_priv, beacon_update);
 947         struct sk_buff *beacon;
 948
 949         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 950         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 951
 952         if (!beacon) {
 953                 IWL_ERR(priv, "update beacon failed\n");
 954                 return;
 955         }
 956
 957         mutex_lock(&priv->mutex);
 958         /* new beacon skb is allocated every time; dispose previous.*/
 959         if (priv->ibss_beacon)
 960                 dev_kfree_skb(priv->ibss_beacon);
 961
 962         priv->ibss_beacon = beacon;
 963         mutex_unlock(&priv->mutex);
 964
 965         iwl3945_send_beacon_cmd(priv);
 966 }
 967
 968 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 969                                 struct iwl_rx_mem_buffer *rxb)
 970 {
 971 #ifdef CONFIG_IWLWIFI_DEBUG
 972         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 973         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 974         u8 rate = beacon->beacon_notify_hdr.rate;
 975
 976         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 977                 "tsf %d %d rate %d\n",
 978                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 979                 beacon->beacon_notify_hdr.failure_frame,
 980                 le32_to_cpu(beacon->ibss_mgr_status),
 981                 le32_to_cpu(beacon->high_tsf),
 982                 le32_to_cpu(beacon->low_tsf), rate);
 983 #endif
 984
 985         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 986             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 987                 queue_work(priv->workqueue, &priv->beacon_update);
 988 }
 989
 990 /* Handle notification from uCode that card's power state is changing
 991  * due to software, hardware, or critical temperature RFKILL */
 992 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 993                                     struct iwl_rx_mem_buffer *rxb)
 994 {
 995         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 996         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 997         unsigned long status = priv->status;
 998
 999         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
1000                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1001                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1002
1003         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1004                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1005
1006         if (flags & HW_CARD_DISABLED)
1007                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1008         else
1009                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1010
1011
1012         iwl_scan_cancel(priv);
1013
1014         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1015              test_bit(STATUS_RF_KILL_HW, &priv->status)))
1016                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
1017                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
1018         else
1019                 wake_up_interruptible(&priv->wait_command_queue);
1020 }
1021
1022 /**
1023  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
1024  *
1025  * Setup the RX handlers for each of the reply types sent from the uCode
1026  * to the host.
1027  *
1028  * This function chains into the hardware specific files for them to setup
1029  * any hardware specific handlers as well.
1030  */
1031 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
1032 {
1033         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
1034         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
1035         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
1036         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1037         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1038         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1039             iwl_rx_pm_debug_statistics_notif;
1040         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
1041
1042         /*
1043          * The same handler is used for both the REPLY to a discrete
1044          * statistics request from the host as well as for the periodic
1045          * statistics notifications (after received beacons) from the uCode.
1046          */
1047         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
1048         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
1049
1050         iwl_setup_spectrum_handlers(priv);
1051         iwl_setup_rx_scan_handlers(priv);
1052         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
1053
1054         /* Set up hardware specific Rx handlers */
1055         iwl3945_hw_rx_handler_setup(priv);
1056 }
1057
1058 /************************** RX-FUNCTIONS ****************************/
1059 /*
1060  * Rx theory of operation
1061  *
1062  * The host allocates 32 DMA target addresses and passes the host address
1063  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1064  * 0 to 31
1065  *
1066  * Rx Queue Indexes
1067  * The host/firmware share two index registers for managing the Rx buffers.
1068  *
1069  * The READ index maps to the first position that the firmware may be writing
1070  * to -- the driver can read up to (but not including) this position and get
1071  * good data.
1072  * The READ index is managed by the firmware once the card is enabled.
1073  *
1074  * The WRITE index maps to the last position the driver has read from -- the
1075  * position preceding WRITE is the last slot the firmware can place a packet.
1076  *
1077  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1078  * WRITE = READ.
1079  *
1080  * During initialization, the host sets up the READ queue position to the first
1081  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1082  *
1083  * When the firmware places a packet in a buffer, it will advance the READ index
1084  * and fire the RX interrupt.  The driver can then query the READ index and
1085  * process as many packets as possible, moving the WRITE index forward as it
1086  * resets the Rx queue buffers with new memory.
1087  *
1088  * The management in the driver is as follows:
1089  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1090  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1091  *   to replenish the iwl->rxq->rx_free.
1092  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1093  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1094  *   'processed' and 'read' driver indexes as well)
1095  * + A received packet is processed and handed to the kernel network stack,
1096  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1097  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1098  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1099  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1100  *   were enough free buffers and RX_STALLED is set it is cleared.
1101  *
1102  *
1103  * Driver sequence:
1104  *
1105  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1106  *                            iwl3945_rx_queue_restock
1107  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1108  *                            queue, updates firmware pointers, and updates
1109  *                            the WRITE index.  If insufficient rx_free buffers
1110  *                            are available, schedules iwl3945_rx_replenish
1111  *
1112  * -- enable interrupts --
1113  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1114  *                            READ INDEX, detaching the SKB from the pool.
1115  *                            Moves the packet buffer from queue to rx_used.
1116  *                            Calls iwl3945_rx_queue_restock to refill any empty
1117  *                            slots.
1118  * ...
1119  *
1120  */
1121
1122 /**
1123  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1124  */
1125 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1126                                           dma_addr_t dma_addr)
1127 {
1128         return cpu_to_le32((u32)dma_addr);
1129 }
1130
1131 /**
1132  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1133  *
1134  * If there are slots in the RX queue that need to be restocked,
1135  * and we have free pre-allocated buffers, fill the ranks as much
1136  * as we can, pulling from rx_free.
1137  *
1138  * This moves the 'write' index forward to catch up with 'processed', and
1139  * also updates the memory address in the firmware to reference the new
1140  * target buffer.
1141  */
1142 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1143 {
1144         struct iwl_rx_queue *rxq = &priv->rxq;
1145         struct list_head *element;
1146         struct iwl_rx_mem_buffer *rxb;
1147         unsigned long flags;
1148         int write, rc;
1149
1150         spin_lock_irqsave(&rxq->lock, flags);
1151         write = rxq->write & ~0x7;
1152         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1153                 /* Get next free Rx buffer, remove from free list */
1154                 element = rxq->rx_free.next;
1155                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1156                 list_del(element);
1157
1158                 /* Point to Rx buffer via next RBD in circular buffer */
1159                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1160                 rxq->queue[rxq->write] = rxb;
1161                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1162                 rxq->free_count--;
1163         }
1164         spin_unlock_irqrestore(&rxq->lock, flags);
1165         /* If the pre-allocated buffer pool is dropping low, schedule to
1166          * refill it */
1167         if (rxq->free_count <= RX_LOW_WATERMARK)
1168                 queue_work(priv->workqueue, &priv->rx_replenish);
1169
1170
1171         /* If we've added more space for the firmware to place data, tell it.
1172          * Increment device's write pointer in multiples of 8. */
1173         if ((rxq->write_actual != (rxq->write & ~0x7))
1174             || (abs(rxq->write - rxq->read) > 7)) {
1175                 spin_lock_irqsave(&rxq->lock, flags);
1176                 rxq->need_update = 1;
1177                 spin_unlock_irqrestore(&rxq->lock, flags);
1178                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1179                 if (rc)
1180                         return rc;
1181         }
1182
1183         return 0;
1184 }
1185
1186 /**
1187  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1188  *
1189  * When moving to rx_free an SKB is allocated for the slot.
1190  *
1191  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1192  * This is called as a scheduled work item (except for during initialization)
1193  */
1194 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1195 {
1196         struct iwl_rx_queue *rxq = &priv->rxq;
1197         struct list_head *element;
1198         struct iwl_rx_mem_buffer *rxb;
1199         unsigned long flags;
1200
1201         while (1) {
1202                 spin_lock_irqsave(&rxq->lock, flags);
1203
1204                 if (list_empty(&rxq->rx_used)) {
1205                         spin_unlock_irqrestore(&rxq->lock, flags);
1206                         return;
1207                 }
1208
1209                 element = rxq->rx_used.next;
1210                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1211                 list_del(element);
1212                 spin_unlock_irqrestore(&rxq->lock, flags);
1213
1214                 /* Alloc a new receive buffer */
1215                 rxb->skb =
1216                     alloc_skb(priv->hw_params.rx_buf_size,
1217                                 priority);
1218                 if (!rxb->skb) {
1219                         if (net_ratelimit())
1220                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1221                         /* We don't reschedule replenish work here -- we will
1222                          * call the restock method and if it still needs
1223                          * more buffers it will schedule replenish */
1224                         break;
1225                 }
1226
1227                 /* If radiotap head is required, reserve some headroom here.
1228                  * The physical head count is a variable rx_stats->phy_count.
1229                  * We reserve 4 bytes here. Plus these extra bytes, the
1230                  * headroom of the physical head should be enough for the
1231                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1232                  */
1233                 skb_reserve(rxb->skb, 4);
1234
1235                 /* Get physical address of RB/SKB */
1236                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1237                                                 rxb->skb->data,
1238                                                 priv->hw_params.rx_buf_size,
1239                                                 PCI_DMA_FROMDEVICE);
1240
1241                 spin_lock_irqsave(&rxq->lock, flags);
1242                 list_add_tail(&rxb->list, &rxq->rx_free);
1243                 priv->alloc_rxb_skb++;
1244                 rxq->free_count++;
1245                 spin_unlock_irqrestore(&rxq->lock, flags);
1246         }
1247 }
1248
1249 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1250 {
1251         unsigned long flags;
1252         int i;
1253         spin_lock_irqsave(&rxq->lock, flags);
1254         INIT_LIST_HEAD(&rxq->rx_free);
1255         INIT_LIST_HEAD(&rxq->rx_used);
1256         /* Fill the rx_used queue with _all_ of the Rx buffers */
1257         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1258                 /* In the reset function, these buffers may have been allocated
1259                  * to an SKB, so we need to unmap and free potential storage */
1260                 if (rxq->pool[i].skb != NULL) {
1261                         pci_unmap_single(priv->pci_dev,
1262                                          rxq->pool[i].real_dma_addr,
1263                                          priv->hw_params.rx_buf_size,
1264                                          PCI_DMA_FROMDEVICE);
1265                         priv->alloc_rxb_skb--;
1266                         dev_kfree_skb(rxq->pool[i].skb);
1267                         rxq->pool[i].skb = NULL;
1268                 }
1269                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1270         }
1271
1272         /* Set us so that we have processed and used all buffers, but have
1273          * not restocked the Rx queue with fresh buffers */
1274         rxq->read = rxq->write = 0;
1275         rxq->free_count = 0;
1276         rxq->write_actual = 0;
1277         spin_unlock_irqrestore(&rxq->lock, flags);
1278 }
1279
1280 void iwl3945_rx_replenish(void *data)
1281 {
1282         struct iwl_priv *priv = data;
1283         unsigned long flags;
1284
1285         iwl3945_rx_allocate(priv, GFP_KERNEL);
1286
1287         spin_lock_irqsave(&priv->lock, flags);
1288         iwl3945_rx_queue_restock(priv);
1289         spin_unlock_irqrestore(&priv->lock, flags);
1290 }
1291
1292 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1293 {
1294         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1295
1296         iwl3945_rx_queue_restock(priv);
1297 }
1298
1299
1300 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1301  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1302  * This free routine walks the list of POOL entries and if SKB is set to
1303  * non NULL it is unmapped and freed
1304  */
1305 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1306 {
1307         int i;
1308         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1309                 if (rxq->pool[i].skb != NULL) {
1310                         pci_unmap_single(priv->pci_dev,
1311                                          rxq->pool[i].real_dma_addr,
1312                                          priv->hw_params.rx_buf_size,
1313                                          PCI_DMA_FROMDEVICE);
1314                         dev_kfree_skb(rxq->pool[i].skb);
1315                 }
1316         }
1317
1318         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1319                             rxq->dma_addr);
1320         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1321                             rxq->rb_stts, rxq->rb_stts_dma);
1322         rxq->bd = NULL;
1323         rxq->rb_stts  = NULL;
1324 }
1325
1326
1327 /* Convert linear signal-to-noise ratio into dB */
1328 static u8 ratio2dB[100] = {
1329 /*       0   1   2   3   4   5   6   7   8   9 */
1330          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1331         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1332         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1333         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1334         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1335         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1336         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1337         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1338         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1339         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1340 };
1341
1342 /* Calculates a relative dB value from a ratio of linear
1343  *   (i.e. not dB) signal levels.
1344  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1345 int iwl3945_calc_db_from_ratio(int sig_ratio)
1346 {
1347         /* 1000:1 or higher just report as 60 dB */
1348         if (sig_ratio >= 1000)
1349                 return 60;
1350
1351         /* 100:1 or higher, divide by 10 and use table,
1352          *   add 20 dB to make up for divide by 10 */
1353         if (sig_ratio >= 100)
1354                 return 20 + (int)ratio2dB[sig_ratio/10];
1355
1356         /* We shouldn't see this */
1357         if (sig_ratio < 1)
1358                 return 0;
1359
1360         /* Use table for ratios 1:1 - 99:1 */
1361         return (int)ratio2dB[sig_ratio];
1362 }
1363
1364 #define PERFECT_RSSI (-20) /* dBm */
1365 #define WORST_RSSI (-95)   /* dBm */
1366 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1367
1368 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1369  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1370  *   about formulas used below. */
1371 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1372 {
1373         int sig_qual;
1374         int degradation = PERFECT_RSSI - rssi_dbm;
1375
1376         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1377          * as indicator; formula is (signal dbm - noise dbm).
1378          * SNR at or above 40 is a great signal (100%).
1379          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1380          * Weakest usable signal is usually 10 - 15 dB SNR. */
1381         if (noise_dbm) {
1382                 if (rssi_dbm - noise_dbm >= 40)
1383                         return 100;
1384                 else if (rssi_dbm < noise_dbm)
1385                         return 0;
1386                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1387
1388         /* Else use just the signal level.
1389          * This formula is a least squares fit of data points collected and
1390          *   compared with a reference system that had a percentage (%) display
1391          *   for signal quality. */
1392         } else
1393                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1394                             (15 * RSSI_RANGE + 62 * degradation)) /
1395                            (RSSI_RANGE * RSSI_RANGE);
1396
1397         if (sig_qual > 100)
1398                 sig_qual = 100;
1399         else if (sig_qual < 1)
1400                 sig_qual = 0;
1401
1402         return sig_qual;
1403 }
1404
1405 /**
1406  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1407  *
1408  * Uses the priv->rx_handlers callback function array to invoke
1409  * the appropriate handlers, including command responses,
1410  * frame-received notifications, and other notifications.
1411  */
1412 static void iwl3945_rx_handle(struct iwl_priv *priv)
1413 {
1414         struct iwl_rx_mem_buffer *rxb;
1415         struct iwl_rx_packet *pkt;
1416         struct iwl_rx_queue *rxq = &priv->rxq;
1417         u32 r, i;
1418         int reclaim;
1419         unsigned long flags;
1420         u8 fill_rx = 0;
1421         u32 count = 8;
1422         int total_empty = 0;
1423
1424         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1425          * buffer that the driver may process (last buffer filled by ucode). */
1426         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1427         i = rxq->read;
1428
1429         /* calculate total frames need to be restock after handling RX */
1430         total_empty = r - priv->rxq.write_actual;
1431         if (total_empty < 0)
1432                 total_empty += RX_QUEUE_SIZE;
1433
1434         if (total_empty > (RX_QUEUE_SIZE / 2))
1435                 fill_rx = 1;
1436         /* Rx interrupt, but nothing sent from uCode */
1437         if (i == r)
1438                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1439
1440         while (i != r) {
1441                 rxb = rxq->queue[i];
1442
1443                 /* If an RXB doesn't have a Rx queue slot associated with it,
1444                  * then a bug has been introduced in the queue refilling
1445                  * routines -- catch it here */
1446                 BUG_ON(rxb == NULL);
1447
1448                 rxq->queue[i] = NULL;
1449
1450                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1451                                 priv->hw_params.rx_buf_size,
1452                                 PCI_DMA_FROMDEVICE);
1453                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1454
1455                 /* Reclaim a command buffer only if this packet is a response
1456                  *   to a (driver-originated) command.
1457                  * If the packet (e.g. Rx frame) originated from uCode,
1458                  *   there is no command buffer to reclaim.
1459                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1460                  *   but apparently a few don't get set; catch them here. */
1461                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1462                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1463                         (pkt->hdr.cmd != REPLY_TX);
1464
1465                 /* Based on type of command response or notification,
1466                  *   handle those that need handling via function in
1467                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1468                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1469                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1470                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1471                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1472                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1473                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1474                 } else {
1475                         /* No handling needed */
1476                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1477                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1478                                 r, i, get_cmd_string(pkt->hdr.cmd),
1479                                 pkt->hdr.cmd);
1480                 }
1481
1482                 if (reclaim) {
1483                         /* Invoke any callbacks, transfer the skb to caller, and
1484                          * fire off the (possibly) blocking iwl_send_cmd()
1485                          * as we reclaim the driver command queue */
1486                         if (rxb && rxb->skb)
1487                                 iwl_tx_cmd_complete(priv, rxb);
1488                         else
1489                                 IWL_WARN(priv, "Claim null rxb?\n");
1490                 }
1491
1492                 /* For now we just don't re-use anything.  We can tweak this
1493                  * later to try and re-use notification packets and SKBs that
1494                  * fail to Rx correctly */
1495                 if (rxb->skb != NULL) {
1496                         priv->alloc_rxb_skb--;
1497                         dev_kfree_skb_any(rxb->skb);
1498                         rxb->skb = NULL;
1499                 }
1500
1501                 spin_lock_irqsave(&rxq->lock, flags);
1502                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1503                 spin_unlock_irqrestore(&rxq->lock, flags);
1504                 i = (i + 1) & RX_QUEUE_MASK;
1505                 /* If there are a lot of unused frames,
1506                  * restock the Rx queue so ucode won't assert. */
1507                 if (fill_rx) {
1508                         count++;
1509                         if (count >= 8) {
1510                                 priv->rxq.read = i;
1511                                 iwl3945_rx_replenish_now(priv);
1512                                 count = 0;
1513                         }
1514                 }
1515         }
1516
1517         /* Backtrack one entry */
1518         priv->rxq.read = i;
1519         if (fill_rx)
1520                 iwl3945_rx_replenish_now(priv);
1521         else
1522                 iwl3945_rx_queue_restock(priv);
1523 }
1524
1525 /* call this function to flush any scheduled tasklet */
1526 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1527 {
1528         /* wait to make sure we flush pending tasklet*/
1529         synchronize_irq(priv->pci_dev->irq);
1530         tasklet_kill(&priv->irq_tasklet);
1531 }
1532
1533 static const char *desc_lookup(int i)
1534 {
1535         switch (i) {
1536         case 1:
1537                 return "FAIL";
1538         case 2:
1539                 return "BAD_PARAM";
1540         case 3:
1541                 return "BAD_CHECKSUM";
1542         case 4:
1543                 return "NMI_INTERRUPT";
1544         case 5:
1545                 return "SYSASSERT";
1546         case 6:
1547                 return "FATAL_ERROR";
1548         }
1549
1550         return "UNKNOWN";
1551 }
1552
1553 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1554 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1555
1556 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1557 {
1558         u32 i;
1559         u32 desc, time, count, base, data1;
1560         u32 blink1, blink2, ilink1, ilink2;
1561
1562         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1563
1564         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1565                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1566                 return;
1567         }
1568
1569
1570         count = iwl_read_targ_mem(priv, base);
1571
1572         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1573                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1574                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1575                         priv->status, count);
1576         }
1577
1578         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1579                   "ilink1  nmiPC   Line\n");
1580         for (i = ERROR_START_OFFSET;
1581              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1582              i += ERROR_ELEM_SIZE) {
1583                 desc = iwl_read_targ_mem(priv, base + i);
1584                 time =
1585                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1586                 blink1 =
1587                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1588                 blink2 =
1589                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1590                 ilink1 =
1591                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1592                 ilink2 =
1593                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1594                 data1 =
1595                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1596
1597                 IWL_ERR(priv,
1598                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1599                         desc_lookup(desc), desc, time, blink1, blink2,
1600                         ilink1, ilink2, data1);
1601         }
1602
1603 }
1604
1605 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1606
1607 /**
1608  * iwl3945_print_event_log - Dump error event log to syslog
1609  *
1610  */
1611 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1612                                 u32 num_events, u32 mode)
1613 {
1614         u32 i;
1615         u32 base;       /* SRAM byte address of event log header */
1616         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1617         u32 ptr;        /* SRAM byte address of log data */
1618         u32 ev, time, data; /* event log data */
1619
1620         if (num_events == 0)
1621                 return;
1622
1623         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1624
1625         if (mode == 0)
1626                 event_size = 2 * sizeof(u32);
1627         else
1628                 event_size = 3 * sizeof(u32);
1629
1630         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1631
1632         /* "time" is actually "data" for mode 0 (no timestamp).
1633          * place event id # at far right for easier visual parsing. */
1634         for (i = 0; i < num_events; i++) {
1635                 ev = iwl_read_targ_mem(priv, ptr);
1636                 ptr += sizeof(u32);
1637                 time = iwl_read_targ_mem(priv, ptr);
1638                 ptr += sizeof(u32);
1639                 if (mode == 0) {
1640                         /* data, ev */
1641                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1642                 } else {
1643                         data = iwl_read_targ_mem(priv, ptr);
1644                         ptr += sizeof(u32);
1645                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1646                 }
1647         }
1648 }
1649
1650 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1651 {
1652         u32 base;       /* SRAM byte address of event log header */
1653         u32 capacity;   /* event log capacity in # entries */
1654         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1655         u32 num_wraps;  /* # times uCode wrapped to top of log */
1656         u32 next_entry; /* index of next entry to be written by uCode */
1657         u32 size;       /* # entries that we'll print */
1658
1659         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1660         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1661                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1662                 return;
1663         }
1664
1665         /* event log header */
1666         capacity = iwl_read_targ_mem(priv, base);
1667         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1668         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1669         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1670
1671         size = num_wraps ? capacity : next_entry;
1672
1673         /* bail out if nothing in log */
1674         if (size == 0) {
1675                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1676                 return;
1677         }
1678
1679         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1680                   size, num_wraps);
1681
1682         /* if uCode has wrapped back to top of log, start at the oldest entry,
1683          * i.e the next one that uCode would fill. */
1684         if (num_wraps)
1685                 iwl3945_print_event_log(priv, next_entry,
1686                                     capacity - next_entry, mode);
1687
1688         /* (then/else) start at top of log */
1689         iwl3945_print_event_log(priv, 0, next_entry, mode);
1690
1691 }
1692
1693 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1694 {
1695         u32 inta, handled = 0;
1696         u32 inta_fh;
1697         unsigned long flags;
1698 #ifdef CONFIG_IWLWIFI_DEBUG
1699         u32 inta_mask;
1700 #endif
1701
1702         spin_lock_irqsave(&priv->lock, flags);
1703
1704         /* Ack/clear/reset pending uCode interrupts.
1705          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1706          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1707         inta = iwl_read32(priv, CSR_INT);
1708         iwl_write32(priv, CSR_INT, inta);
1709
1710         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1711          * Any new interrupts that happen after this, either while we're
1712          * in this tasklet, or later, will show up in next ISR/tasklet. */
1713         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1714         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1715
1716 #ifdef CONFIG_IWLWIFI_DEBUG
1717         if (priv->debug_level & IWL_DL_ISR) {
1718                 /* just for debug */
1719                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1720                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1721                               inta, inta_mask, inta_fh);
1722         }
1723 #endif
1724
1725         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1726          * atomic, make sure that inta covers all the interrupts that
1727          * we've discovered, even if FH interrupt came in just after
1728          * reading CSR_INT. */
1729         if (inta_fh & CSR39_FH_INT_RX_MASK)
1730                 inta |= CSR_INT_BIT_FH_RX;
1731         if (inta_fh & CSR39_FH_INT_TX_MASK)
1732                 inta |= CSR_INT_BIT_FH_TX;
1733
1734         /* Now service all interrupt bits discovered above. */
1735         if (inta & CSR_INT_BIT_HW_ERR) {
1736                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1737
1738                 /* Tell the device to stop sending interrupts */
1739                 iwl_disable_interrupts(priv);
1740
1741                 priv->isr_stats.hw++;
1742                 iwl_irq_handle_error(priv);
1743
1744                 handled |= CSR_INT_BIT_HW_ERR;
1745
1746                 spin_unlock_irqrestore(&priv->lock, flags);
1747
1748                 return;
1749         }
1750
1751 #ifdef CONFIG_IWLWIFI_DEBUG
1752         if (priv->debug_level & (IWL_DL_ISR)) {
1753                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1754                 if (inta & CSR_INT_BIT_SCD) {
1755                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1756                                       "the frame/frames.\n");
1757                         priv->isr_stats.sch++;
1758                 }
1759
1760                 /* Alive notification via Rx interrupt will do the real work */
1761                 if (inta & CSR_INT_BIT_ALIVE) {
1762                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1763                         priv->isr_stats.alive++;
1764                 }
1765         }
1766 #endif
1767         /* Safely ignore these bits for debug checks below */
1768         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1769
1770         /* Error detected by uCode */
1771         if (inta & CSR_INT_BIT_SW_ERR) {
1772                 IWL_ERR(priv, "Microcode SW error detected. "
1773                         "Restarting 0x%X.\n", inta);
1774                 priv->isr_stats.sw++;
1775                 priv->isr_stats.sw_err = inta;
1776                 iwl_irq_handle_error(priv);
1777                 handled |= CSR_INT_BIT_SW_ERR;
1778         }
1779
1780         /* uCode wakes up after power-down sleep */
1781         if (inta & CSR_INT_BIT_WAKEUP) {
1782                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1783                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1784                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1785                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1786                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1787                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1788                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1789                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1790
1791                 priv->isr_stats.wakeup++;
1792                 handled |= CSR_INT_BIT_WAKEUP;
1793         }
1794
1795         /* All uCode command responses, including Tx command responses,
1796          * Rx "responses" (frame-received notification), and other
1797          * notifications from uCode come through here*/
1798         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1799                 iwl3945_rx_handle(priv);
1800                 priv->isr_stats.rx++;
1801                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1802         }
1803
1804         if (inta & CSR_INT_BIT_FH_TX) {
1805                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1806                 priv->isr_stats.tx++;
1807
1808                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1809                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1810                                         (FH39_SRVC_CHNL), 0x0);
1811                 handled |= CSR_INT_BIT_FH_TX;
1812         }
1813
1814         if (inta & ~handled) {
1815                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1816                 priv->isr_stats.unhandled++;
1817         }
1818
1819         if (inta & ~priv->inta_mask) {
1820                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1821                          inta & ~priv->inta_mask);
1822                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1823         }
1824
1825         /* Re-enable all interrupts */
1826         /* only Re-enable if disabled by irq */
1827         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1828                 iwl_enable_interrupts(priv);
1829
1830 #ifdef CONFIG_IWLWIFI_DEBUG
1831         if (priv->debug_level & (IWL_DL_ISR)) {
1832                 inta = iwl_read32(priv, CSR_INT);
1833                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1834                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1835                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1836                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1837         }
1838 #endif
1839         spin_unlock_irqrestore(&priv->lock, flags);
1840 }
1841
1842 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1843                                          enum ieee80211_band band,
1844                                      u8 is_active, u8 n_probes,
1845                                      struct iwl3945_scan_channel *scan_ch)
1846 {
1847         const struct ieee80211_channel *channels = NULL;
1848         const struct ieee80211_supported_band *sband;
1849         const struct iwl_channel_info *ch_info;
1850         u16 passive_dwell = 0;
1851         u16 active_dwell = 0;
1852         int added, i;
1853
1854         sband = iwl_get_hw_mode(priv, band);
1855         if (!sband)
1856                 return 0;
1857
1858         channels = sband->channels;
1859
1860         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1861         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1862
1863         if (passive_dwell <= active_dwell)
1864                 passive_dwell = active_dwell + 1;
1865
1866         for (i = 0, added = 0; i < sband->n_channels; i++) {
1867                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
1868                         continue;
1869
1870                 scan_ch->channel = channels[i].hw_value;
1871
1872                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1873                 if (!is_channel_valid(ch_info)) {
1874                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1875                                        scan_ch->channel);
1876                         continue;
1877                 }
1878
1879                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1880                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1881                 /* If passive , set up for auto-switch
1882                  *  and use long active_dwell time.
1883                  */
1884                 if (!is_active || is_channel_passive(ch_info) ||
1885                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1886                         scan_ch->type = 0;      /* passive */
1887                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1888                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1889                 } else {
1890                         scan_ch->type = 1;      /* active */
1891                 }
1892
1893                 /* Set direct probe bits. These may be used both for active
1894                  * scan channels (probes gets sent right away),
1895                  * or for passive channels (probes get se sent only after
1896                  * hearing clear Rx packet).*/
1897                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1898                         if (n_probes)
1899                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1900                 } else {
1901                         /* uCode v1 does not allow setting direct probe bits on
1902                          * passive channel. */
1903                         if ((scan_ch->type & 1) && n_probes)
1904                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1905                 }
1906
1907                 /* Set txpower levels to defaults */
1908                 scan_ch->tpc.dsp_atten = 110;
1909                 /* scan_pwr_info->tpc.dsp_atten; */
1910
1911                 /*scan_pwr_info->tpc.tx_gain; */
1912                 if (band == IEEE80211_BAND_5GHZ)
1913                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1914                 else {
1915                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1916                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1917                          * power level:
1918                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1919                          */
1920                 }
1921
1922                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1923                                scan_ch->channel,
1924                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1925                                (scan_ch->type & 1) ?
1926                                active_dwell : passive_dwell);
1927
1928                 scan_ch++;
1929                 added++;
1930         }
1931
1932         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1933         return added;
1934 }
1935
1936 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1937                               struct ieee80211_rate *rates)
1938 {
1939         int i;
1940
1941         for (i = 0; i < IWL_RATE_COUNT; i++) {
1942                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1943                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1944                 rates[i].hw_value_short = i;
1945                 rates[i].flags = 0;
1946                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1947                         /*
1948                          * If CCK != 1M then set short preamble rate flag.
1949                          */
1950                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1951                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1952                 }
1953         }
1954 }
1955
1956 /******************************************************************************
1957  *
1958  * uCode download functions
1959  *
1960  ******************************************************************************/
1961
1962 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1963 {
1964         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1965         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1966         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1967         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1968         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1969         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1970 }
1971
1972 /**
1973  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1974  *     looking at all data.
1975  */
1976 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1977 {
1978         u32 val;
1979         u32 save_len = len;
1980         int rc = 0;
1981         u32 errcnt;
1982
1983         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1984
1985         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1986                                IWL39_RTC_INST_LOWER_BOUND);
1987
1988         errcnt = 0;
1989         for (; len > 0; len -= sizeof(u32), image++) {
1990                 /* read data comes through single port, auto-incr addr */
1991                 /* NOTE: Use the debugless read so we don't flood kernel log
1992                  * if IWL_DL_IO is set */
1993                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1994                 if (val != le32_to_cpu(*image)) {
1995                         IWL_ERR(priv, "uCode INST section is invalid at "
1996                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1997                                   save_len - len, val, le32_to_cpu(*image));
1998                         rc = -EIO;
1999                         errcnt++;
2000                         if (errcnt >= 20)
2001                                 break;
2002                 }
2003         }
2004
2005
2006         if (!errcnt)
2007                 IWL_DEBUG_INFO(priv,
2008                         "ucode image in INSTRUCTION memory is good\n");
2009
2010         return rc;
2011 }
2012
2013
2014 /**
2015  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2016  *   using sample data 100 bytes apart.  If these sample points are good,
2017  *   it's a pretty good bet that everything between them is good, too.
2018  */
2019 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2020 {
2021         u32 val;
2022         int rc = 0;
2023         u32 errcnt = 0;
2024         u32 i;
2025
2026         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2027
2028         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2029                 /* read data comes through single port, auto-incr addr */
2030                 /* NOTE: Use the debugless read so we don't flood kernel log
2031                  * if IWL_DL_IO is set */
2032                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2033                         i + IWL39_RTC_INST_LOWER_BOUND);
2034                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2035                 if (val != le32_to_cpu(*image)) {
2036 #if 0 /* Enable this if you want to see details */
2037                         IWL_ERR(priv, "uCode INST section is invalid at "
2038                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2039                                   i, val, *image);
2040 #endif
2041                         rc = -EIO;
2042                         errcnt++;
2043                         if (errcnt >= 3)
2044                                 break;
2045                 }
2046         }
2047
2048         return rc;
2049 }
2050
2051
2052 /**
2053  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2054  *    and verify its contents
2055  */
2056 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2057 {
2058         __le32 *image;
2059         u32 len;
2060         int rc = 0;
2061
2062         /* Try bootstrap */
2063         image = (__le32 *)priv->ucode_boot.v_addr;
2064         len = priv->ucode_boot.len;
2065         rc = iwl3945_verify_inst_sparse(priv, image, len);
2066         if (rc == 0) {
2067                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2068                 return 0;
2069         }
2070
2071         /* Try initialize */
2072         image = (__le32 *)priv->ucode_init.v_addr;
2073         len = priv->ucode_init.len;
2074         rc = iwl3945_verify_inst_sparse(priv, image, len);
2075         if (rc == 0) {
2076                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2077                 return 0;
2078         }
2079
2080         /* Try runtime/protocol */
2081         image = (__le32 *)priv->ucode_code.v_addr;
2082         len = priv->ucode_code.len;
2083         rc = iwl3945_verify_inst_sparse(priv, image, len);
2084         if (rc == 0) {
2085                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2086                 return 0;
2087         }
2088
2089         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2090
2091         /* Since nothing seems to match, show first several data entries in
2092          * instruction SRAM, so maybe visual inspection will give a clue.
2093          * Selection of bootstrap image (vs. other images) is arbitrary. */
2094         image = (__le32 *)priv->ucode_boot.v_addr;
2095         len = priv->ucode_boot.len;
2096         rc = iwl3945_verify_inst_full(priv, image, len);
2097
2098         return rc;
2099 }
2100
2101 static void iwl3945_nic_start(struct iwl_priv *priv)
2102 {
2103         /* Remove all resets to allow NIC to operate */
2104         iwl_write32(priv, CSR_RESET, 0);
2105 }
2106
2107 /**
2108  * iwl3945_read_ucode - Read uCode images from disk file.
2109  *
2110  * Copy into buffers for card to fetch via bus-mastering
2111  */
2112 static int iwl3945_read_ucode(struct iwl_priv *priv)
2113 {
2114         struct iwl_ucode *ucode;
2115         int ret = -EINVAL, index;
2116         const struct firmware *ucode_raw;
2117         /* firmware file name contains uCode/driver compatibility version */
2118         const char *name_pre = priv->cfg->fw_name_pre;
2119         const unsigned int api_max = priv->cfg->ucode_api_max;
2120         const unsigned int api_min = priv->cfg->ucode_api_min;
2121         char buf[25];
2122         u8 *src;
2123         size_t len;
2124         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2125
2126         /* Ask kernel firmware_class module to get the boot firmware off disk.
2127          * request_firmware() is synchronous, file is in memory on return. */
2128         for (index = api_max; index >= api_min; index--) {
2129                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2130                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2131                 if (ret < 0) {
2132                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2133                                   buf, ret);
2134                         if (ret == -ENOENT)
2135                                 continue;
2136                         else
2137                                 goto error;
2138                 } else {
2139                         if (index < api_max)
2140                                 IWL_ERR(priv, "Loaded firmware %s, "
2141                                         "which is deprecated. "
2142                                         " Please use API v%u instead.\n",
2143                                           buf, api_max);
2144                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2145                                        "(%zd bytes) from disk\n",
2146                                        buf, ucode_raw->size);
2147                         break;
2148                 }
2149         }
2150
2151         if (ret < 0)
2152                 goto error;
2153
2154         /* Make sure that we got at least our header! */
2155         if (ucode_raw->size < sizeof(*ucode)) {
2156                 IWL_ERR(priv, "File size way too small!\n");
2157                 ret = -EINVAL;
2158                 goto err_release;
2159         }
2160
2161         /* Data from ucode file:  header followed by uCode images */
2162         ucode = (void *)ucode_raw->data;
2163
2164         priv->ucode_ver = le32_to_cpu(ucode->ver);
2165         api_ver = IWL_UCODE_API(priv->ucode_ver);
2166         inst_size = le32_to_cpu(ucode->inst_size);
2167         data_size = le32_to_cpu(ucode->data_size);
2168         init_size = le32_to_cpu(ucode->init_size);
2169         init_data_size = le32_to_cpu(ucode->init_data_size);
2170         boot_size = le32_to_cpu(ucode->boot_size);
2171
2172         /* api_ver should match the api version forming part of the
2173          * firmware filename ... but we don't check for that and only rely
2174          * on the API version read from firmware header from here on forward */
2175
2176         if (api_ver < api_min || api_ver > api_max) {
2177                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2178                           "Driver supports v%u, firmware is v%u.\n",
2179                           api_max, api_ver);
2180                 priv->ucode_ver = 0;
2181                 ret = -EINVAL;
2182                 goto err_release;
2183         }
2184         if (api_ver != api_max)
2185                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2186                           "got %u. New firmware can be obtained "
2187                           "from http://www.intellinuxwireless.org.\n",
2188                           api_max, api_ver);
2189
2190         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2191                 IWL_UCODE_MAJOR(priv->ucode_ver),
2192                 IWL_UCODE_MINOR(priv->ucode_ver),
2193                 IWL_UCODE_API(priv->ucode_ver),
2194                 IWL_UCODE_SERIAL(priv->ucode_ver));
2195
2196         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2197                        priv->ucode_ver);
2198         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2199                        inst_size);
2200         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2201                        data_size);
2202         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2203                        init_size);
2204         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2205                        init_data_size);
2206         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2207                        boot_size);
2208
2209
2210         /* Verify size of file vs. image size info in file's header */
2211         if (ucode_raw->size < sizeof(*ucode) +
2212                 inst_size + data_size + init_size +
2213                 init_data_size + boot_size) {
2214
2215                 IWL_DEBUG_INFO(priv, "uCode file size %zd too small\n",
2216                                ucode_raw->size);
2217                 ret = -EINVAL;
2218                 goto err_release;
2219         }
2220
2221         /* Verify that uCode images will fit in card's SRAM */
2222         if (inst_size > IWL39_MAX_INST_SIZE) {
2223                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2224                                inst_size);
2225                 ret = -EINVAL;
2226                 goto err_release;
2227         }
2228
2229         if (data_size > IWL39_MAX_DATA_SIZE) {
2230                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2231                                data_size);
2232                 ret = -EINVAL;
2233                 goto err_release;
2234         }
2235         if (init_size > IWL39_MAX_INST_SIZE) {
2236                 IWL_DEBUG_INFO(priv,
2237                                 "uCode init instr len %d too large to fit in\n",
2238                                 init_size);
2239                 ret = -EINVAL;
2240                 goto err_release;
2241         }
2242         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2243                 IWL_DEBUG_INFO(priv,
2244                                 "uCode init data len %d too large to fit in\n",
2245                                 init_data_size);
2246                 ret = -EINVAL;
2247                 goto err_release;
2248         }
2249         if (boot_size > IWL39_MAX_BSM_SIZE) {
2250                 IWL_DEBUG_INFO(priv,
2251                                 "uCode boot instr len %d too large to fit in\n",
2252                                 boot_size);
2253                 ret = -EINVAL;
2254                 goto err_release;
2255         }
2256
2257         /* Allocate ucode buffers for card's bus-master loading ... */
2258
2259         /* Runtime instructions and 2 copies of data:
2260          * 1) unmodified from disk
2261          * 2) backup cache for save/restore during power-downs */
2262         priv->ucode_code.len = inst_size;
2263         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2264
2265         priv->ucode_data.len = data_size;
2266         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2267
2268         priv->ucode_data_backup.len = data_size;
2269         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2270
2271         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2272             !priv->ucode_data_backup.v_addr)
2273                 goto err_pci_alloc;
2274
2275         /* Initialization instructions and data */
2276         if (init_size && init_data_size) {
2277                 priv->ucode_init.len = init_size;
2278                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2279
2280                 priv->ucode_init_data.len = init_data_size;
2281                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2282
2283                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2284                         goto err_pci_alloc;
2285         }
2286
2287         /* Bootstrap (instructions only, no data) */
2288         if (boot_size) {
2289                 priv->ucode_boot.len = boot_size;
2290                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2291
2292                 if (!priv->ucode_boot.v_addr)
2293                         goto err_pci_alloc;
2294         }
2295
2296         /* Copy images into buffers for card's bus-master reads ... */
2297
2298         /* Runtime instructions (first block of data in file) */
2299         src = &ucode->data[0];
2300         len = priv->ucode_code.len;
2301         IWL_DEBUG_INFO(priv,
2302                 "Copying (but not loading) uCode instr len %zd\n", len);
2303         memcpy(priv->ucode_code.v_addr, src, len);
2304         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2305                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2306
2307         /* Runtime data (2nd block)
2308          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2309         src = &ucode->data[inst_size];
2310         len = priv->ucode_data.len;
2311         IWL_DEBUG_INFO(priv,
2312                 "Copying (but not loading) uCode data len %zd\n", len);
2313         memcpy(priv->ucode_data.v_addr, src, len);
2314         memcpy(priv->ucode_data_backup.v_addr, src, len);
2315
2316         /* Initialization instructions (3rd block) */
2317         if (init_size) {
2318                 src = &ucode->data[inst_size + data_size];
2319                 len = priv->ucode_init.len;
2320                 IWL_DEBUG_INFO(priv,
2321                         "Copying (but not loading) init instr len %zd\n", len);
2322                 memcpy(priv->ucode_init.v_addr, src, len);
2323         }
2324
2325         /* Initialization data (4th block) */
2326         if (init_data_size) {
2327                 src = &ucode->data[inst_size + data_size + init_size];
2328                 len = priv->ucode_init_data.len;
2329                 IWL_DEBUG_INFO(priv,
2330                         "Copying (but not loading) init data len %zd\n", len);
2331                 memcpy(priv->ucode_init_data.v_addr, src, len);
2332         }
2333
2334         /* Bootstrap instructions (5th block) */
2335         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
2336         len = priv->ucode_boot.len;
2337         IWL_DEBUG_INFO(priv,
2338                 "Copying (but not loading) boot instr len %zd\n", len);
2339         memcpy(priv->ucode_boot.v_addr, src, len);
2340
2341         /* We have our copies now, allow OS release its copies */
2342         release_firmware(ucode_raw);
2343         return 0;
2344
2345  err_pci_alloc:
2346         IWL_ERR(priv, "failed to allocate pci memory\n");
2347         ret = -ENOMEM;
2348         iwl3945_dealloc_ucode_pci(priv);
2349
2350  err_release:
2351         release_firmware(ucode_raw);
2352
2353  error:
2354         return ret;
2355 }
2356
2357
2358 /**
2359  * iwl3945_set_ucode_ptrs - Set uCode address location
2360  *
2361  * Tell initialization uCode where to find runtime uCode.
2362  *
2363  * BSM registers initially contain pointers to initialization uCode.
2364  * We need to replace them to load runtime uCode inst and data,
2365  * and to save runtime data when powering down.
2366  */
2367 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2368 {
2369         dma_addr_t pinst;
2370         dma_addr_t pdata;
2371
2372         /* bits 31:0 for 3945 */
2373         pinst = priv->ucode_code.p_addr;
2374         pdata = priv->ucode_data_backup.p_addr;
2375
2376         /* Tell bootstrap uCode where to find image to load */
2377         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2378         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2379         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2380                                  priv->ucode_data.len);
2381
2382         /* Inst byte count must be last to set up, bit 31 signals uCode
2383          *   that all new ptr/size info is in place */
2384         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2385                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2386
2387         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2388
2389         return 0;
2390 }
2391
2392 /**
2393  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2394  *
2395  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2396  *
2397  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2398  */
2399 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2400 {
2401         /* Check alive response for "valid" sign from uCode */
2402         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2403                 /* We had an error bringing up the hardware, so take it
2404                  * all the way back down so we can try again */
2405                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2406                 goto restart;
2407         }
2408
2409         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2410          * This is a paranoid check, because we would not have gotten the
2411          * "initialize" alive if code weren't properly loaded.  */
2412         if (iwl3945_verify_ucode(priv)) {
2413                 /* Runtime instruction load was bad;
2414                  * take it all the way back down so we can try again */
2415                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2416                 goto restart;
2417         }
2418
2419         /* Send pointers to protocol/runtime uCode image ... init code will
2420          * load and launch runtime uCode, which will send us another "Alive"
2421          * notification. */
2422         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2423         if (iwl3945_set_ucode_ptrs(priv)) {
2424                 /* Runtime instruction load won't happen;
2425                  * take it all the way back down so we can try again */
2426                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2427                 goto restart;
2428         }
2429         return;
2430
2431  restart:
2432         queue_work(priv->workqueue, &priv->restart);
2433 }
2434
2435 /**
2436  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2437  *                   from protocol/runtime uCode (initialization uCode's
2438  *                   Alive gets handled by iwl3945_init_alive_start()).
2439  */
2440 static void iwl3945_alive_start(struct iwl_priv *priv)
2441 {
2442         int thermal_spin = 0;
2443         u32 rfkill;
2444
2445         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2446
2447         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2448                 /* We had an error bringing up the hardware, so take it
2449                  * all the way back down so we can try again */
2450                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2451                 goto restart;
2452         }
2453
2454         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2455          * This is a paranoid check, because we would not have gotten the
2456          * "runtime" alive if code weren't properly loaded.  */
2457         if (iwl3945_verify_ucode(priv)) {
2458                 /* Runtime instruction load was bad;
2459                  * take it all the way back down so we can try again */
2460                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2461                 goto restart;
2462         }
2463
2464         iwl_clear_stations_table(priv);
2465
2466         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2467         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2468
2469         if (rfkill & 0x1) {
2470                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2471                 /* if RFKILL is not on, then wait for thermal
2472                  * sensor in adapter to kick in */
2473                 while (iwl3945_hw_get_temperature(priv) == 0) {
2474                         thermal_spin++;
2475                         udelay(10);
2476                 }
2477
2478                 if (thermal_spin)
2479                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2480                                        thermal_spin * 10);
2481         } else
2482                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2483
2484         /* After the ALIVE response, we can send commands to 3945 uCode */
2485         set_bit(STATUS_ALIVE, &priv->status);
2486
2487         if (iwl_is_rfkill(priv))
2488                 return;
2489
2490         ieee80211_wake_queues(priv->hw);
2491
2492         priv->active_rate = priv->rates_mask;
2493         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2494
2495         iwl_power_update_mode(priv, false);
2496
2497         if (iwl_is_associated(priv)) {
2498                 struct iwl3945_rxon_cmd *active_rxon =
2499                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2500
2501                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2502                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2503         } else {
2504                 /* Initialize our rx_config data */
2505                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2506         }
2507
2508         /* Configure Bluetooth device coexistence support */
2509         iwl_send_bt_config(priv);
2510
2511         /* Configure the adapter for unassociated operation */
2512         iwlcore_commit_rxon(priv);
2513
2514         iwl3945_reg_txpower_periodic(priv);
2515
2516         iwl3945_led_register(priv);
2517
2518         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2519         set_bit(STATUS_READY, &priv->status);
2520         wake_up_interruptible(&priv->wait_command_queue);
2521
2522         /* reassociate for ADHOC mode */
2523         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2524                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2525                                                                 priv->vif);
2526                 if (beacon)
2527                         iwl_mac_beacon_update(priv->hw, beacon);
2528         }
2529
2530         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2531                 iwl_set_mode(priv, priv->iw_mode);
2532
2533         return;
2534
2535  restart:
2536         queue_work(priv->workqueue, &priv->restart);
2537 }
2538
2539 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2540
2541 static void __iwl3945_down(struct iwl_priv *priv)
2542 {
2543         unsigned long flags;
2544         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2545         struct ieee80211_conf *conf = NULL;
2546
2547         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2548
2549         conf = ieee80211_get_hw_conf(priv->hw);
2550
2551         if (!exit_pending)
2552                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2553
2554         iwl3945_led_unregister(priv);
2555         iwl_clear_stations_table(priv);
2556
2557         /* Unblock any waiting calls */
2558         wake_up_interruptible_all(&priv->wait_command_queue);
2559
2560         /* Wipe out the EXIT_PENDING status bit if we are not actually
2561          * exiting the module */
2562         if (!exit_pending)
2563                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2564
2565         /* stop and reset the on-board processor */
2566         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2567
2568         /* tell the device to stop sending interrupts */
2569         spin_lock_irqsave(&priv->lock, flags);
2570         iwl_disable_interrupts(priv);
2571         spin_unlock_irqrestore(&priv->lock, flags);
2572         iwl_synchronize_irq(priv);
2573
2574         if (priv->mac80211_registered)
2575                 ieee80211_stop_queues(priv->hw);
2576
2577         /* If we have not previously called iwl3945_init() then
2578          * clear all bits but the RF Kill bits and return */
2579         if (!iwl_is_init(priv)) {
2580                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2581                                         STATUS_RF_KILL_HW |
2582                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2583                                         STATUS_GEO_CONFIGURED |
2584                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2585                                         STATUS_EXIT_PENDING;
2586                 goto exit;
2587         }
2588
2589         /* ...otherwise clear out all the status bits but the RF Kill
2590          * bit and continue taking the NIC down. */
2591         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2592                                 STATUS_RF_KILL_HW |
2593                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2594                                 STATUS_GEO_CONFIGURED |
2595                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2596                                 STATUS_FW_ERROR |
2597                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2598                                 STATUS_EXIT_PENDING;
2599
2600         priv->cfg->ops->lib->apm_ops.reset(priv);
2601         spin_lock_irqsave(&priv->lock, flags);
2602         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2603         spin_unlock_irqrestore(&priv->lock, flags);
2604
2605         iwl3945_hw_txq_ctx_stop(priv);
2606         iwl3945_hw_rxq_stop(priv);
2607
2608         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2609                                 APMG_CLK_VAL_DMA_CLK_RQT);
2610
2611         udelay(5);
2612
2613         if (exit_pending)
2614                 priv->cfg->ops->lib->apm_ops.stop(priv);
2615         else
2616                 priv->cfg->ops->lib->apm_ops.reset(priv);
2617
2618  exit:
2619         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2620
2621         if (priv->ibss_beacon)
2622                 dev_kfree_skb(priv->ibss_beacon);
2623         priv->ibss_beacon = NULL;
2624
2625         /* clear out any free frames */
2626         iwl3945_clear_free_frames(priv);
2627 }
2628
2629 static void iwl3945_down(struct iwl_priv *priv)
2630 {
2631         mutex_lock(&priv->mutex);
2632         __iwl3945_down(priv);
2633         mutex_unlock(&priv->mutex);
2634
2635         iwl3945_cancel_deferred_work(priv);
2636 }
2637
2638 #define MAX_HW_RESTARTS 5
2639
2640 static int __iwl3945_up(struct iwl_priv *priv)
2641 {
2642         int rc, i;
2643
2644         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2645                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2646                 return -EIO;
2647         }
2648
2649         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2650                 IWL_ERR(priv, "ucode not available for device bring up\n");
2651                 return -EIO;
2652         }
2653
2654         /* If platform's RF_KILL switch is NOT set to KILL */
2655         if (iwl_read32(priv, CSR_GP_CNTRL) &
2656                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2657                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2658         else {
2659                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2660                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2661                 return -ENODEV;
2662         }
2663
2664         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2665
2666         rc = iwl3945_hw_nic_init(priv);
2667         if (rc) {
2668                 IWL_ERR(priv, "Unable to int nic\n");
2669                 return rc;
2670         }
2671
2672         /* make sure rfkill handshake bits are cleared */
2673         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2674         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2675                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2676
2677         /* clear (again), then enable host interrupts */
2678         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2679         iwl_enable_interrupts(priv);
2680
2681         /* really make sure rfkill handshake bits are cleared */
2682         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2683         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2684
2685         /* Copy original ucode data image from disk into backup cache.
2686          * This will be used to initialize the on-board processor's
2687          * data SRAM for a clean start when the runtime program first loads. */
2688         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2689                priv->ucode_data.len);
2690
2691         /* We return success when we resume from suspend and rf_kill is on. */
2692         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2693                 return 0;
2694
2695         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2696
2697                 iwl_clear_stations_table(priv);
2698
2699                 /* load bootstrap state machine,
2700                  * load bootstrap program into processor's memory,
2701                  * prepare to load the "initialize" uCode */
2702                 priv->cfg->ops->lib->load_ucode(priv);
2703
2704                 if (rc) {
2705                         IWL_ERR(priv,
2706                                 "Unable to set up bootstrap uCode: %d\n", rc);
2707                         continue;
2708                 }
2709
2710                 /* start card; "initialize" will load runtime ucode */
2711                 iwl3945_nic_start(priv);
2712
2713                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2714
2715                 return 0;
2716         }
2717
2718         set_bit(STATUS_EXIT_PENDING, &priv->status);
2719         __iwl3945_down(priv);
2720         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2721
2722         /* tried to restart and config the device for as long as our
2723          * patience could withstand */
2724         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2725         return -EIO;
2726 }
2727
2728
2729 /*****************************************************************************
2730  *
2731  * Workqueue callbacks
2732  *
2733  *****************************************************************************/
2734
2735 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2736 {
2737         struct iwl_priv *priv =
2738             container_of(data, struct iwl_priv, init_alive_start.work);
2739
2740         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2741                 return;
2742
2743         mutex_lock(&priv->mutex);
2744         iwl3945_init_alive_start(priv);
2745         mutex_unlock(&priv->mutex);
2746 }
2747
2748 static void iwl3945_bg_alive_start(struct work_struct *data)
2749 {
2750         struct iwl_priv *priv =
2751             container_of(data, struct iwl_priv, alive_start.work);
2752
2753         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2754                 return;
2755
2756         mutex_lock(&priv->mutex);
2757         iwl3945_alive_start(priv);
2758         mutex_unlock(&priv->mutex);
2759 }
2760
2761 static void iwl3945_rfkill_poll(struct work_struct *data)
2762 {
2763         struct iwl_priv *priv =
2764             container_of(data, struct iwl_priv, rfkill_poll.work);
2765
2766         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2767                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2768         else
2769                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2770
2771         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2772                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2773
2774         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2775                            round_jiffies_relative(2 * HZ));
2776
2777 }
2778
2779 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2780 static void iwl3945_bg_request_scan(struct work_struct *data)
2781 {
2782         struct iwl_priv *priv =
2783             container_of(data, struct iwl_priv, request_scan);
2784         struct iwl_host_cmd cmd = {
2785                 .id = REPLY_SCAN_CMD,
2786                 .len = sizeof(struct iwl3945_scan_cmd),
2787                 .meta.flags = CMD_SIZE_HUGE,
2788         };
2789         int rc = 0;
2790         struct iwl3945_scan_cmd *scan;
2791         struct ieee80211_conf *conf = NULL;
2792         u8 n_probes = 0;
2793         enum ieee80211_band band;
2794         bool is_active = false;
2795
2796         conf = ieee80211_get_hw_conf(priv->hw);
2797
2798         mutex_lock(&priv->mutex);
2799
2800         cancel_delayed_work(&priv->scan_check);
2801
2802         if (!iwl_is_ready(priv)) {
2803                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2804                 goto done;
2805         }
2806
2807         /* Make sure the scan wasn't canceled before this queued work
2808          * was given the chance to run... */
2809         if (!test_bit(STATUS_SCANNING, &priv->status))
2810                 goto done;
2811
2812         /* This should never be called or scheduled if there is currently
2813          * a scan active in the hardware. */
2814         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2815                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2816                                 "Ignoring second request.\n");
2817                 rc = -EIO;
2818                 goto done;
2819         }
2820
2821         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2822                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2823                 goto done;
2824         }
2825
2826         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2827                 IWL_DEBUG_HC(priv,
2828                         "Scan request while abort pending. Queuing.\n");
2829                 goto done;
2830         }
2831
2832         if (iwl_is_rfkill(priv)) {
2833                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2834                 goto done;
2835         }
2836
2837         if (!test_bit(STATUS_READY, &priv->status)) {
2838                 IWL_DEBUG_HC(priv,
2839                         "Scan request while uninitialized. Queuing.\n");
2840                 goto done;
2841         }
2842
2843         if (!priv->scan_bands) {
2844                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2845                 goto done;
2846         }
2847
2848         if (!priv->scan) {
2849                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2850                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2851                 if (!priv->scan) {
2852                         rc = -ENOMEM;
2853                         goto done;
2854                 }
2855         }
2856         scan = priv->scan;
2857         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2858
2859         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2860         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2861
2862         if (iwl_is_associated(priv)) {
2863                 u16 interval = 0;
2864                 u32 extra;
2865                 u32 suspend_time = 100;
2866                 u32 scan_suspend_time = 100;
2867                 unsigned long flags;
2868
2869                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2870
2871                 spin_lock_irqsave(&priv->lock, flags);
2872                 interval = priv->beacon_int;
2873                 spin_unlock_irqrestore(&priv->lock, flags);
2874
2875                 scan->suspend_time = 0;
2876                 scan->max_out_time = cpu_to_le32(200 * 1024);
2877                 if (!interval)
2878                         interval = suspend_time;
2879                 /*
2880                  * suspend time format:
2881                  *  0-19: beacon interval in usec (time before exec.)
2882                  * 20-23: 0
2883                  * 24-31: number of beacons (suspend between channels)
2884                  */
2885
2886                 extra = (suspend_time / interval) << 24;
2887                 scan_suspend_time = 0xFF0FFFFF &
2888                     (extra | ((suspend_time % interval) * 1024));
2889
2890                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2891                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2892                                scan_suspend_time, interval);
2893         }
2894
2895         if (priv->scan_request->n_ssids) {
2896                 int i, p = 0;
2897                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2898                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2899                         /* always does wildcard anyway */
2900                         if (!priv->scan_request->ssids[i].ssid_len)
2901                                 continue;
2902                         scan->direct_scan[p].id = WLAN_EID_SSID;
2903                         scan->direct_scan[p].len =
2904                                 priv->scan_request->ssids[i].ssid_len;
2905                         memcpy(scan->direct_scan[p].ssid,
2906                                priv->scan_request->ssids[i].ssid,
2907                                priv->scan_request->ssids[i].ssid_len);
2908                         n_probes++;
2909                         p++;
2910                 }
2911                 is_active = true;
2912         } else
2913                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2914
2915         /* We don't build a direct scan probe request; the uCode will do
2916          * that based on the direct_mask added to each channel entry */
2917         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2918         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2919         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2920
2921         /* flags + rate selection */
2922
2923         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2924                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2925                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2926                 scan->good_CRC_th = 0;
2927                 band = IEEE80211_BAND_2GHZ;
2928         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2929                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2930                 /*
2931                  * If active scaning is requested but a certain channel
2932                  * is marked passive, we can do active scanning if we
2933                  * detect transmissions.
2934                  */
2935                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2936                 band = IEEE80211_BAND_5GHZ;
2937         } else {
2938                 IWL_WARN(priv, "Invalid scan band count\n");
2939                 goto done;
2940         }
2941
2942         scan->tx_cmd.len = cpu_to_le16(
2943                         iwl_fill_probe_req(priv,
2944                                 (struct ieee80211_mgmt *)scan->data,
2945                                 priv->scan_request->ie,
2946                                 priv->scan_request->ie_len,
2947                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2948
2949         /* select Rx antennas */
2950         scan->flags |= iwl3945_get_antenna_flags(priv);
2951
2952         if (iwl_is_monitor_mode(priv))
2953                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2954
2955         scan->channel_count =
2956                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2957                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2958
2959         if (scan->channel_count == 0) {
2960                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2961                 goto done;
2962         }
2963
2964         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2965             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2966         cmd.data = scan;
2967         scan->len = cpu_to_le16(cmd.len);
2968
2969         set_bit(STATUS_SCAN_HW, &priv->status);
2970         rc = iwl_send_cmd_sync(priv, &cmd);
2971         if (rc)
2972                 goto done;
2973
2974         queue_delayed_work(priv->workqueue, &priv->scan_check,
2975                            IWL_SCAN_CHECK_WATCHDOG);
2976
2977         mutex_unlock(&priv->mutex);
2978         return;
2979
2980  done:
2981         /* can not perform scan make sure we clear scanning
2982          * bits from status so next scan request can be performed.
2983          * if we dont clear scanning status bit here all next scan
2984          * will fail
2985         */
2986         clear_bit(STATUS_SCAN_HW, &priv->status);
2987         clear_bit(STATUS_SCANNING, &priv->status);
2988
2989         /* inform mac80211 scan aborted */
2990         queue_work(priv->workqueue, &priv->scan_completed);
2991         mutex_unlock(&priv->mutex);
2992 }
2993
2994 static void iwl3945_bg_up(struct work_struct *data)
2995 {
2996         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2997
2998         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2999                 return;
3000
3001         mutex_lock(&priv->mutex);
3002         __iwl3945_up(priv);
3003         mutex_unlock(&priv->mutex);
3004 }
3005
3006 static void iwl3945_bg_restart(struct work_struct *data)
3007 {
3008         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3009
3010         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3011                 return;
3012
3013         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3014                 mutex_lock(&priv->mutex);
3015                 priv->vif = NULL;
3016                 priv->is_open = 0;
3017                 mutex_unlock(&priv->mutex);
3018                 iwl3945_down(priv);
3019                 ieee80211_restart_hw(priv->hw);
3020         } else {
3021                 iwl3945_down(priv);
3022                 queue_work(priv->workqueue, &priv->up);
3023         }
3024 }
3025
3026 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3027 {
3028         struct iwl_priv *priv =
3029             container_of(data, struct iwl_priv, rx_replenish);
3030
3031         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3032                 return;
3033
3034         mutex_lock(&priv->mutex);
3035         iwl3945_rx_replenish(priv);
3036         mutex_unlock(&priv->mutex);
3037 }
3038
3039 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3040
3041 void iwl3945_post_associate(struct iwl_priv *priv)
3042 {
3043         int rc = 0;
3044         struct ieee80211_conf *conf = NULL;
3045
3046         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3047                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3048                 return;
3049         }
3050
3051
3052         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3053                         priv->assoc_id, priv->active_rxon.bssid_addr);
3054
3055         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3056                 return;
3057
3058         if (!priv->vif || !priv->is_open)
3059                 return;
3060
3061         iwl_scan_cancel_timeout(priv, 200);
3062
3063         conf = ieee80211_get_hw_conf(priv->hw);
3064
3065         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3066         iwlcore_commit_rxon(priv);
3067
3068         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3069         iwl3945_setup_rxon_timing(priv);
3070         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3071                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3072         if (rc)
3073                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3074                             "Attempting to continue.\n");
3075
3076         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3077
3078         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3079
3080         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3081                         priv->assoc_id, priv->beacon_int);
3082
3083         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3084                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3085         else
3086                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3087
3088         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3089                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3090                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3091                 else
3092                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3093
3094                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3095                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3096
3097         }
3098
3099         iwlcore_commit_rxon(priv);
3100
3101         switch (priv->iw_mode) {
3102         case NL80211_IFTYPE_STATION:
3103                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3104                 break;
3105
3106         case NL80211_IFTYPE_ADHOC:
3107
3108                 priv->assoc_id = 1;
3109                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3110                 iwl3945_sync_sta(priv, IWL_STA_ID,
3111                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3112                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3113                                  CMD_ASYNC);
3114                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3115                 iwl3945_send_beacon_cmd(priv);
3116
3117                 break;
3118
3119         default:
3120                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3121                            __func__, priv->iw_mode);
3122                 break;
3123         }
3124
3125         iwl_activate_qos(priv, 0);
3126
3127         /* we have just associated, don't start scan too early */
3128         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3129 }
3130
3131 /*****************************************************************************
3132  *
3133  * mac80211 entry point functions
3134  *
3135  *****************************************************************************/
3136
3137 #define UCODE_READY_TIMEOUT     (2 * HZ)
3138
3139 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3140 {
3141         struct iwl_priv *priv = hw->priv;
3142         int ret;
3143
3144         IWL_DEBUG_MAC80211(priv, "enter\n");
3145
3146         /* we should be verifying the device is ready to be opened */
3147         mutex_lock(&priv->mutex);
3148
3149         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3150          * ucode filename and max sizes are card-specific. */
3151
3152         if (!priv->ucode_code.len) {
3153                 ret = iwl3945_read_ucode(priv);
3154                 if (ret) {
3155                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3156                         mutex_unlock(&priv->mutex);
3157                         goto out_release_irq;
3158                 }
3159         }
3160
3161         ret = __iwl3945_up(priv);
3162
3163         mutex_unlock(&priv->mutex);
3164
3165         if (ret)
3166                 goto out_release_irq;
3167
3168         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3169
3170         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3171          * mac80211 will not be run successfully. */
3172         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3173                         test_bit(STATUS_READY, &priv->status),
3174                         UCODE_READY_TIMEOUT);
3175         if (!ret) {
3176                 if (!test_bit(STATUS_READY, &priv->status)) {
3177                         IWL_ERR(priv,
3178                                 "Wait for START_ALIVE timeout after %dms.\n",
3179                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3180                         ret = -ETIMEDOUT;
3181                         goto out_release_irq;
3182                 }
3183         }
3184
3185         /* ucode is running and will send rfkill notifications,
3186          * no need to poll the killswitch state anymore */
3187         cancel_delayed_work(&priv->rfkill_poll);
3188
3189         priv->is_open = 1;
3190         IWL_DEBUG_MAC80211(priv, "leave\n");
3191         return 0;
3192
3193 out_release_irq:
3194         priv->is_open = 0;
3195         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3196         return ret;
3197 }
3198
3199 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3200 {
3201         struct iwl_priv *priv = hw->priv;
3202
3203         IWL_DEBUG_MAC80211(priv, "enter\n");
3204
3205         if (!priv->is_open) {
3206                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3207                 return;
3208         }
3209
3210         priv->is_open = 0;
3211
3212         if (iwl_is_ready_rf(priv)) {
3213                 /* stop mac, cancel any scan request and clear
3214                  * RXON_FILTER_ASSOC_MSK BIT
3215                  */
3216                 mutex_lock(&priv->mutex);
3217                 iwl_scan_cancel_timeout(priv, 100);
3218                 mutex_unlock(&priv->mutex);
3219         }
3220
3221         iwl3945_down(priv);
3222
3223         flush_workqueue(priv->workqueue);
3224
3225         /* start polling the killswitch state again */
3226         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3227                            round_jiffies_relative(2 * HZ));
3228
3229         IWL_DEBUG_MAC80211(priv, "leave\n");
3230 }
3231
3232 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3233 {
3234         struct iwl_priv *priv = hw->priv;
3235
3236         IWL_DEBUG_MAC80211(priv, "enter\n");
3237
3238         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3239                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3240
3241         if (iwl3945_tx_skb(priv, skb))
3242                 dev_kfree_skb_any(skb);
3243
3244         IWL_DEBUG_MAC80211(priv, "leave\n");
3245         return NETDEV_TX_OK;
3246 }
3247
3248 void iwl3945_config_ap(struct iwl_priv *priv)
3249 {
3250         int rc = 0;
3251
3252         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3253                 return;
3254
3255         /* The following should be done only at AP bring up */
3256         if (!(iwl_is_associated(priv))) {
3257
3258                 /* RXON - unassoc (to set timing command) */
3259                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3260                 iwlcore_commit_rxon(priv);
3261
3262                 /* RXON Timing */
3263                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3264                 iwl3945_setup_rxon_timing(priv);
3265                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3266                                       sizeof(priv->rxon_timing),
3267                                       &priv->rxon_timing);
3268                 if (rc)
3269                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3270                                         "Attempting to continue.\n");
3271
3272                 /* FIXME: what should be the assoc_id for AP? */
3273                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3274                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3275                         priv->staging_rxon.flags |=
3276                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3277                 else
3278                         priv->staging_rxon.flags &=
3279                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3280
3281                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3282                         if (priv->assoc_capability &
3283                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3284                                 priv->staging_rxon.flags |=
3285                                         RXON_FLG_SHORT_SLOT_MSK;
3286                         else
3287                                 priv->staging_rxon.flags &=
3288                                         ~RXON_FLG_SHORT_SLOT_MSK;
3289
3290                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3291                                 priv->staging_rxon.flags &=
3292                                         ~RXON_FLG_SHORT_SLOT_MSK;
3293                 }
3294                 /* restore RXON assoc */
3295                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3296                 iwlcore_commit_rxon(priv);
3297                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3298         }
3299         iwl3945_send_beacon_cmd(priv);
3300
3301         /* FIXME - we need to add code here to detect a totally new
3302          * configuration, reset the AP, unassoc, rxon timing, assoc,
3303          * clear sta table, add BCAST sta... */
3304 }
3305
3306 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3307                                struct ieee80211_vif *vif,
3308                                struct ieee80211_sta *sta,
3309                                struct ieee80211_key_conf *key)
3310 {
3311         struct iwl_priv *priv = hw->priv;
3312         const u8 *addr;
3313         int ret = 0;
3314         u8 sta_id = IWL_INVALID_STATION;
3315         u8 static_key;
3316
3317         IWL_DEBUG_MAC80211(priv, "enter\n");
3318
3319         if (iwl3945_mod_params.sw_crypto) {
3320                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3321                 return -EOPNOTSUPP;
3322         }
3323
3324         addr = sta ? sta->addr : iwl_bcast_addr;
3325         static_key = !iwl_is_associated(priv);
3326
3327         if (!static_key) {
3328                 sta_id = iwl_find_station(priv, addr);
3329                 if (sta_id == IWL_INVALID_STATION) {
3330                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3331                                             addr);
3332                         return -EINVAL;
3333                 }
3334         }
3335
3336         mutex_lock(&priv->mutex);
3337         iwl_scan_cancel_timeout(priv, 100);
3338         mutex_unlock(&priv->mutex);
3339
3340         switch (cmd) {
3341         case SET_KEY:
3342                 if (static_key)
3343                         ret = iwl3945_set_static_key(priv, key);
3344                 else
3345                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3346                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3347                 break;
3348         case DISABLE_KEY:
3349                 if (static_key)
3350                         ret = iwl3945_remove_static_key(priv);
3351                 else
3352                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3353                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3354                 break;
3355         default:
3356                 ret = -EINVAL;
3357         }
3358
3359         IWL_DEBUG_MAC80211(priv, "leave\n");
3360
3361         return ret;
3362 }
3363
3364 /*****************************************************************************
3365  *
3366  * sysfs attributes
3367  *
3368  *****************************************************************************/
3369
3370 #ifdef CONFIG_IWLWIFI_DEBUG
3371
3372 /*
3373  * The following adds a new attribute to the sysfs representation
3374  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3375  * used for controlling the debug level.
3376  *
3377  * See the level definitions in iwl for details.
3378  */
3379 static ssize_t show_debug_level(struct device *d,
3380                                 struct device_attribute *attr, char *buf)
3381 {
3382         struct iwl_priv *priv = dev_get_drvdata(d);
3383
3384         return sprintf(buf, "0x%08X\n", priv->debug_level);
3385 }
3386 static ssize_t store_debug_level(struct device *d,
3387                                 struct device_attribute *attr,
3388                                  const char *buf, size_t count)
3389 {
3390         struct iwl_priv *priv = dev_get_drvdata(d);
3391         unsigned long val;
3392         int ret;
3393
3394         ret = strict_strtoul(buf, 0, &val);
3395         if (ret)
3396                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3397         else
3398                 priv->debug_level = val;
3399
3400         return strnlen(buf, count);
3401 }
3402
3403 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3404                         show_debug_level, store_debug_level);
3405
3406 #endif /* CONFIG_IWLWIFI_DEBUG */
3407
3408 static ssize_t show_temperature(struct device *d,
3409                                 struct device_attribute *attr, char *buf)
3410 {
3411         struct iwl_priv *priv = dev_get_drvdata(d);
3412
3413         if (!iwl_is_alive(priv))
3414                 return -EAGAIN;
3415
3416         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3417 }
3418
3419 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3420
3421 static ssize_t show_tx_power(struct device *d,
3422                              struct device_attribute *attr, char *buf)
3423 {
3424         struct iwl_priv *priv = dev_get_drvdata(d);
3425         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3426 }
3427
3428 static ssize_t store_tx_power(struct device *d,
3429                               struct device_attribute *attr,
3430                               const char *buf, size_t count)
3431 {
3432         struct iwl_priv *priv = dev_get_drvdata(d);
3433         char *p = (char *)buf;
3434         u32 val;
3435
3436         val = simple_strtoul(p, &p, 10);
3437         if (p == buf)
3438                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3439         else
3440                 iwl3945_hw_reg_set_txpower(priv, val);
3441
3442         return count;
3443 }
3444
3445 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3446
3447 static ssize_t show_flags(struct device *d,
3448                           struct device_attribute *attr, char *buf)
3449 {
3450         struct iwl_priv *priv = dev_get_drvdata(d);
3451
3452         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3453 }
3454
3455 static ssize_t store_flags(struct device *d,
3456                            struct device_attribute *attr,
3457                            const char *buf, size_t count)
3458 {
3459         struct iwl_priv *priv = dev_get_drvdata(d);
3460         u32 flags = simple_strtoul(buf, NULL, 0);
3461
3462         mutex_lock(&priv->mutex);
3463         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3464                 /* Cancel any currently running scans... */
3465                 if (iwl_scan_cancel_timeout(priv, 100))
3466                         IWL_WARN(priv, "Could not cancel scan.\n");
3467                 else {
3468                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3469                                        flags);
3470                         priv->staging_rxon.flags = cpu_to_le32(flags);
3471                         iwlcore_commit_rxon(priv);
3472                 }
3473         }
3474         mutex_unlock(&priv->mutex);
3475
3476         return count;
3477 }
3478
3479 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3480
3481 static ssize_t show_filter_flags(struct device *d,
3482                                  struct device_attribute *attr, char *buf)
3483 {
3484         struct iwl_priv *priv = dev_get_drvdata(d);
3485
3486         return sprintf(buf, "0x%04X\n",
3487                 le32_to_cpu(priv->active_rxon.filter_flags));
3488 }
3489
3490 static ssize_t store_filter_flags(struct device *d,
3491                                   struct device_attribute *attr,
3492                                   const char *buf, size_t count)
3493 {
3494         struct iwl_priv *priv = dev_get_drvdata(d);
3495         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3496
3497         mutex_lock(&priv->mutex);
3498         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3499                 /* Cancel any currently running scans... */
3500                 if (iwl_scan_cancel_timeout(priv, 100))
3501                         IWL_WARN(priv, "Could not cancel scan.\n");
3502                 else {
3503                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3504                                        "0x%04X\n", filter_flags);
3505                         priv->staging_rxon.filter_flags =
3506                                 cpu_to_le32(filter_flags);
3507                         iwlcore_commit_rxon(priv);
3508                 }
3509         }
3510         mutex_unlock(&priv->mutex);
3511
3512         return count;
3513 }
3514
3515 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3516                    store_filter_flags);
3517
3518 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3519
3520 static ssize_t show_measurement(struct device *d,
3521                                 struct device_attribute *attr, char *buf)
3522 {
3523         struct iwl_priv *priv = dev_get_drvdata(d);
3524         struct iwl_spectrum_notification measure_report;
3525         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3526         u8 *data = (u8 *)&measure_report;
3527         unsigned long flags;
3528
3529         spin_lock_irqsave(&priv->lock, flags);
3530         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3531                 spin_unlock_irqrestore(&priv->lock, flags);
3532                 return 0;
3533         }
3534         memcpy(&measure_report, &priv->measure_report, size);
3535         priv->measurement_status = 0;
3536         spin_unlock_irqrestore(&priv->lock, flags);
3537
3538         while (size && (PAGE_SIZE - len)) {
3539                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3540                                    PAGE_SIZE - len, 1);
3541                 len = strlen(buf);
3542                 if (PAGE_SIZE - len)
3543                         buf[len++] = '\n';
3544
3545                 ofs += 16;
3546                 size -= min(size, 16U);
3547         }
3548
3549         return len;
3550 }
3551
3552 static ssize_t store_measurement(struct device *d,
3553                                  struct device_attribute *attr,
3554                                  const char *buf, size_t count)
3555 {
3556         struct iwl_priv *priv = dev_get_drvdata(d);
3557         struct ieee80211_measurement_params params = {
3558                 .channel = le16_to_cpu(priv->active_rxon.channel),
3559                 .start_time = cpu_to_le64(priv->last_tsf),
3560                 .duration = cpu_to_le16(1),
3561         };
3562         u8 type = IWL_MEASURE_BASIC;
3563         u8 buffer[32];
3564         u8 channel;
3565
3566         if (count) {
3567                 char *p = buffer;
3568                 strncpy(buffer, buf, min(sizeof(buffer), count));
3569                 channel = simple_strtoul(p, NULL, 0);
3570                 if (channel)
3571                         params.channel = channel;
3572
3573                 p = buffer;
3574                 while (*p && *p != ' ')
3575                         p++;
3576                 if (*p)
3577                         type = simple_strtoul(p + 1, NULL, 0);
3578         }
3579
3580         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3581                        "channel %d (for '%s')\n", type, params.channel, buf);
3582         iwl3945_get_measurement(priv, &params, type);
3583
3584         return count;
3585 }
3586
3587 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3588                    show_measurement, store_measurement);
3589 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3590
3591 static ssize_t store_retry_rate(struct device *d,
3592                                 struct device_attribute *attr,
3593                                 const char *buf, size_t count)
3594 {
3595         struct iwl_priv *priv = dev_get_drvdata(d);
3596
3597         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3598         if (priv->retry_rate <= 0)
3599                 priv->retry_rate = 1;
3600
3601         return count;
3602 }
3603
3604 static ssize_t show_retry_rate(struct device *d,
3605                                struct device_attribute *attr, char *buf)
3606 {
3607         struct iwl_priv *priv = dev_get_drvdata(d);
3608         return sprintf(buf, "%d", priv->retry_rate);
3609 }
3610
3611 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3612                    store_retry_rate);
3613
3614
3615 static ssize_t store_power_level(struct device *d,
3616                                  struct device_attribute *attr,
3617                                  const char *buf, size_t count)
3618 {
3619         struct iwl_priv *priv = dev_get_drvdata(d);
3620         int ret;
3621         unsigned long mode;
3622
3623
3624         mutex_lock(&priv->mutex);
3625
3626         ret = strict_strtoul(buf, 10, &mode);
3627         if (ret)
3628                 goto out;
3629
3630         ret = iwl_power_set_user_mode(priv, mode);
3631         if (ret) {
3632                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3633                 goto out;
3634         }
3635         ret = count;
3636
3637  out:
3638         mutex_unlock(&priv->mutex);
3639         return ret;
3640 }
3641
3642 static ssize_t show_power_level(struct device *d,
3643                                 struct device_attribute *attr, char *buf)
3644 {
3645         struct iwl_priv *priv = dev_get_drvdata(d);
3646         int mode = priv->power_data.user_power_setting;
3647         int level = priv->power_data.power_mode;
3648         char *p = buf;
3649
3650         p += sprintf(p, "INDEX:%d\t", level);
3651         p += sprintf(p, "USER:%d\n", mode);
3652         return p - buf + 1;
3653 }
3654
3655 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR,
3656                    show_power_level, store_power_level);
3657
3658 #define MAX_WX_STRING 80
3659
3660 /* Values are in microsecond */
3661 static const s32 timeout_duration[] = {
3662         350000,
3663         250000,
3664         75000,
3665         37000,
3666         25000,
3667 };
3668 static const s32 period_duration[] = {
3669         400000,
3670         700000,
3671         1000000,
3672         1000000,
3673         1000000
3674 };
3675
3676 static ssize_t show_channels(struct device *d,
3677                              struct device_attribute *attr, char *buf)
3678 {
3679         /* all this shit doesn't belong into sysfs anyway */
3680         return 0;
3681 }
3682
3683 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3684
3685 static ssize_t show_statistics(struct device *d,
3686                                struct device_attribute *attr, char *buf)
3687 {
3688         struct iwl_priv *priv = dev_get_drvdata(d);
3689         u32 size = sizeof(struct iwl3945_notif_statistics);
3690         u32 len = 0, ofs = 0;
3691         u8 *data = (u8 *)&priv->statistics_39;
3692         int rc = 0;
3693
3694         if (!iwl_is_alive(priv))
3695                 return -EAGAIN;
3696
3697         mutex_lock(&priv->mutex);
3698         rc = iwl_send_statistics_request(priv, 0);
3699         mutex_unlock(&priv->mutex);
3700
3701         if (rc) {
3702                 len = sprintf(buf,
3703                               "Error sending statistics request: 0x%08X\n", rc);
3704                 return len;
3705         }
3706
3707         while (size && (PAGE_SIZE - len)) {
3708                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3709                                    PAGE_SIZE - len, 1);
3710                 len = strlen(buf);
3711                 if (PAGE_SIZE - len)
3712                         buf[len++] = '\n';
3713
3714                 ofs += 16;
3715                 size -= min(size, 16U);
3716         }
3717
3718         return len;
3719 }
3720
3721 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3722
3723 static ssize_t show_antenna(struct device *d,
3724                             struct device_attribute *attr, char *buf)
3725 {
3726         struct iwl_priv *priv = dev_get_drvdata(d);
3727
3728         if (!iwl_is_alive(priv))
3729                 return -EAGAIN;
3730
3731         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3732 }
3733
3734 static ssize_t store_antenna(struct device *d,
3735                              struct device_attribute *attr,
3736                              const char *buf, size_t count)
3737 {
3738         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3739         int ant;
3740
3741         if (count == 0)
3742                 return 0;
3743
3744         if (sscanf(buf, "%1i", &ant) != 1) {
3745                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3746                 return count;
3747         }
3748
3749         if ((ant >= 0) && (ant <= 2)) {
3750                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3751                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3752         } else
3753                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3754
3755
3756         return count;
3757 }
3758
3759 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3760
3761 static ssize_t show_status(struct device *d,
3762                            struct device_attribute *attr, char *buf)
3763 {
3764         struct iwl_priv *priv = dev_get_drvdata(d);
3765         if (!iwl_is_alive(priv))
3766                 return -EAGAIN;
3767         return sprintf(buf, "0x%08x\n", (int)priv->status);
3768 }
3769
3770 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3771
3772 static ssize_t dump_error_log(struct device *d,
3773                               struct device_attribute *attr,
3774                               const char *buf, size_t count)
3775 {
3776         struct iwl_priv *priv = dev_get_drvdata(d);
3777         char *p = (char *)buf;
3778
3779         if (p[0] == '1')
3780                 iwl3945_dump_nic_error_log(priv);
3781
3782         return strnlen(buf, count);
3783 }
3784
3785 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3786
3787 static ssize_t dump_event_log(struct device *d,
3788                               struct device_attribute *attr,
3789                               const char *buf, size_t count)
3790 {
3791         struct iwl_priv *priv = dev_get_drvdata(d);
3792         char *p = (char *)buf;
3793
3794         if (p[0] == '1')
3795                 iwl3945_dump_nic_event_log(priv);
3796
3797         return strnlen(buf, count);
3798 }
3799
3800 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
3801
3802 /*****************************************************************************
3803  *
3804  * driver setup and tear down
3805  *
3806  *****************************************************************************/
3807
3808 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3809 {
3810         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3811
3812         init_waitqueue_head(&priv->wait_command_queue);
3813
3814         INIT_WORK(&priv->up, iwl3945_bg_up);
3815         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3816         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3817         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3818         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3819         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3820         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3821         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3822         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3823         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3824         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3825
3826         iwl3945_hw_setup_deferred_work(priv);
3827
3828         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3829                      iwl3945_irq_tasklet, (unsigned long)priv);
3830 }
3831
3832 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3833 {
3834         iwl3945_hw_cancel_deferred_work(priv);
3835
3836         cancel_delayed_work_sync(&priv->init_alive_start);
3837         cancel_delayed_work(&priv->scan_check);
3838         cancel_delayed_work(&priv->alive_start);
3839         cancel_work_sync(&priv->beacon_update);
3840 }
3841
3842 static struct attribute *iwl3945_sysfs_entries[] = {
3843         &dev_attr_antenna.attr,
3844         &dev_attr_channels.attr,
3845         &dev_attr_dump_errors.attr,
3846         &dev_attr_dump_events.attr,
3847         &dev_attr_flags.attr,
3848         &dev_attr_filter_flags.attr,
3849 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3850         &dev_attr_measurement.attr,
3851 #endif
3852         &dev_attr_power_level.attr,
3853         &dev_attr_retry_rate.attr,
3854         &dev_attr_statistics.attr,
3855         &dev_attr_status.attr,
3856         &dev_attr_temperature.attr,
3857         &dev_attr_tx_power.attr,
3858 #ifdef CONFIG_IWLWIFI_DEBUG
3859         &dev_attr_debug_level.attr,
3860 #endif
3861         NULL
3862 };
3863
3864 static struct attribute_group iwl3945_attribute_group = {
3865         .name = NULL,           /* put in device directory */
3866         .attrs = iwl3945_sysfs_entries,
3867 };
3868
3869 static struct ieee80211_ops iwl3945_hw_ops = {
3870         .tx = iwl3945_mac_tx,
3871         .start = iwl3945_mac_start,
3872         .stop = iwl3945_mac_stop,
3873         .add_interface = iwl_mac_add_interface,
3874         .remove_interface = iwl_mac_remove_interface,
3875         .config = iwl_mac_config,
3876         .configure_filter = iwl_configure_filter,
3877         .set_key = iwl3945_mac_set_key,
3878         .get_tx_stats = iwl_mac_get_tx_stats,
3879         .conf_tx = iwl_mac_conf_tx,
3880         .reset_tsf = iwl_mac_reset_tsf,
3881         .bss_info_changed = iwl_bss_info_changed,
3882         .hw_scan = iwl_mac_hw_scan
3883 };
3884
3885 static int iwl3945_init_drv(struct iwl_priv *priv)
3886 {
3887         int ret;
3888         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3889
3890         priv->retry_rate = 1;
3891         priv->ibss_beacon = NULL;
3892
3893         spin_lock_init(&priv->lock);
3894         spin_lock_init(&priv->sta_lock);
3895         spin_lock_init(&priv->hcmd_lock);
3896
3897         INIT_LIST_HEAD(&priv->free_frames);
3898
3899         mutex_init(&priv->mutex);
3900
3901         /* Clear the driver's (not device's) station table */
3902         iwl_clear_stations_table(priv);
3903
3904         priv->data_retry_limit = -1;
3905         priv->ieee_channels = NULL;
3906         priv->ieee_rates = NULL;
3907         priv->band = IEEE80211_BAND_2GHZ;
3908
3909         priv->iw_mode = NL80211_IFTYPE_STATION;
3910
3911         iwl_reset_qos(priv);
3912
3913         priv->qos_data.qos_active = 0;
3914         priv->qos_data.qos_cap.val = 0;
3915
3916         priv->rates_mask = IWL_RATES_MASK;
3917         /* If power management is turned on, default to CAM mode */
3918         priv->power_mode = IWL_POWER_MODE_CAM;
3919         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3920
3921         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3922                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3923                          eeprom->version);
3924                 ret = -EINVAL;
3925                 goto err;
3926         }
3927         ret = iwl_init_channel_map(priv);
3928         if (ret) {
3929                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3930                 goto err;
3931         }
3932
3933         /* Set up txpower settings in driver for all channels */
3934         if (iwl3945_txpower_set_from_eeprom(priv)) {
3935                 ret = -EIO;
3936                 goto err_free_channel_map;
3937         }
3938
3939         ret = iwlcore_init_geos(priv);
3940         if (ret) {
3941                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3942                 goto err_free_channel_map;
3943         }
3944         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3945
3946         return 0;
3947
3948 err_free_channel_map:
3949         iwl_free_channel_map(priv);
3950 err:
3951         return ret;
3952 }
3953
3954 static int iwl3945_setup_mac(struct iwl_priv *priv)
3955 {
3956         int ret;
3957         struct ieee80211_hw *hw = priv->hw;
3958
3959         hw->rate_control_algorithm = "iwl-3945-rs";
3960         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3961
3962         /* Tell mac80211 our characteristics */
3963         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3964                     IEEE80211_HW_NOISE_DBM |
3965                     IEEE80211_HW_SPECTRUM_MGMT;
3966
3967         hw->wiphy->interface_modes =
3968                 BIT(NL80211_IFTYPE_STATION) |
3969                 BIT(NL80211_IFTYPE_ADHOC);
3970
3971         hw->wiphy->custom_regulatory = true;
3972
3973         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3974         /* we create the 802.11 header and a zero-length SSID element */
3975         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3976
3977         /* Default value; 4 EDCA QOS priorities */
3978         hw->queues = 4;
3979
3980         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3981                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3982                         &priv->bands[IEEE80211_BAND_2GHZ];
3983
3984         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3985                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3986                         &priv->bands[IEEE80211_BAND_5GHZ];
3987
3988         ret = ieee80211_register_hw(priv->hw);
3989         if (ret) {
3990                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3991                 return ret;
3992         }
3993         priv->mac80211_registered = 1;
3994
3995         return 0;
3996 }
3997
3998 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3999 {
4000         int err = 0;
4001         struct iwl_priv *priv;
4002         struct ieee80211_hw *hw;
4003         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
4004         struct iwl3945_eeprom *eeprom;
4005         unsigned long flags;
4006
4007         /***********************
4008          * 1. Allocating HW data
4009          * ********************/
4010
4011         /* mac80211 allocates memory for this device instance, including
4012          *   space for this driver's private structure */
4013         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
4014         if (hw == NULL) {
4015                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
4016                 err = -ENOMEM;
4017                 goto out;
4018         }
4019         priv = hw->priv;
4020         SET_IEEE80211_DEV(hw, &pdev->dev);
4021
4022         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
4023              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
4024                 IWL_ERR(priv,
4025                         "invalid queues_num, should be between %d and %d\n",
4026                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
4027                 err = -EINVAL;
4028                 goto out_ieee80211_free_hw;
4029         }
4030
4031         /*
4032          * Disabling hardware scan means that mac80211 will perform scans
4033          * "the hard way", rather than using device's scan.
4034          */
4035         if (iwl3945_mod_params.disable_hw_scan) {
4036                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4037                 iwl3945_hw_ops.hw_scan = NULL;
4038         }
4039
4040
4041         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4042         priv->cfg = cfg;
4043         priv->pci_dev = pdev;
4044         priv->inta_mask = CSR_INI_SET_MASK;
4045
4046 #ifdef CONFIG_IWLWIFI_DEBUG
4047         priv->debug_level = iwl3945_mod_params.debug;
4048         atomic_set(&priv->restrict_refcnt, 0);
4049 #endif
4050
4051         /***************************
4052          * 2. Initializing PCI bus
4053          * *************************/
4054         if (pci_enable_device(pdev)) {
4055                 err = -ENODEV;
4056                 goto out_ieee80211_free_hw;
4057         }
4058
4059         pci_set_master(pdev);
4060
4061         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4062         if (!err)
4063                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4064         if (err) {
4065                 IWL_WARN(priv, "No suitable DMA available.\n");
4066                 goto out_pci_disable_device;
4067         }
4068
4069         pci_set_drvdata(pdev, priv);
4070         err = pci_request_regions(pdev, DRV_NAME);
4071         if (err)
4072                 goto out_pci_disable_device;
4073
4074         /***********************
4075          * 3. Read REV Register
4076          * ********************/
4077         priv->hw_base = pci_iomap(pdev, 0, 0);
4078         if (!priv->hw_base) {
4079                 err = -ENODEV;
4080                 goto out_pci_release_regions;
4081         }
4082
4083         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4084                         (unsigned long long) pci_resource_len(pdev, 0));
4085         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4086
4087         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4088          * PCI Tx retries from interfering with C3 CPU state */
4089         pci_write_config_byte(pdev, 0x41, 0x00);
4090
4091         /* this spin lock will be used in apm_ops.init and EEPROM access
4092          * we should init now
4093          */
4094         spin_lock_init(&priv->reg_lock);
4095
4096         /* amp init */
4097         err = priv->cfg->ops->lib->apm_ops.init(priv);
4098         if (err < 0) {
4099                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
4100                 goto out_iounmap;
4101         }
4102
4103         /***********************
4104          * 4. Read EEPROM
4105          * ********************/
4106
4107         /* Read the EEPROM */
4108         err = iwl_eeprom_init(priv);
4109         if (err) {
4110                 IWL_ERR(priv, "Unable to init EEPROM\n");
4111                 goto out_iounmap;
4112         }
4113         /* MAC Address location in EEPROM same for 3945/4965 */
4114         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4115         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4116         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4117         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4118
4119         /***********************
4120          * 5. Setup HW Constants
4121          * ********************/
4122         /* Device-specific setup */
4123         if (iwl3945_hw_set_hw_params(priv)) {
4124                 IWL_ERR(priv, "failed to set hw settings\n");
4125                 goto out_eeprom_free;
4126         }
4127
4128         /***********************
4129          * 6. Setup priv
4130          * ********************/
4131
4132         err = iwl3945_init_drv(priv);
4133         if (err) {
4134                 IWL_ERR(priv, "initializing driver failed\n");
4135                 goto out_unset_hw_params;
4136         }
4137
4138         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4139                 priv->cfg->name);
4140
4141         /***********************
4142          * 7. Setup Services
4143          * ********************/
4144
4145         spin_lock_irqsave(&priv->lock, flags);
4146         iwl_disable_interrupts(priv);
4147         spin_unlock_irqrestore(&priv->lock, flags);
4148
4149         pci_enable_msi(priv->pci_dev);
4150
4151         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4152                           IRQF_SHARED, DRV_NAME, priv);
4153         if (err) {
4154                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4155                 goto out_disable_msi;
4156         }
4157
4158         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4159         if (err) {
4160                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4161                 goto out_release_irq;
4162         }
4163
4164         iwl_set_rxon_channel(priv,
4165                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4166         iwl3945_setup_deferred_work(priv);
4167         iwl3945_setup_rx_handlers(priv);
4168
4169         /*********************************
4170          * 8. Setup and Register mac80211
4171          * *******************************/
4172
4173         iwl_enable_interrupts(priv);
4174
4175         err = iwl3945_setup_mac(priv);
4176         if (err)
4177                 goto  out_remove_sysfs;
4178
4179         err = iwl_dbgfs_register(priv, DRV_NAME);
4180         if (err)
4181                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4182
4183         /* Start monitoring the killswitch */
4184         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4185                            2 * HZ);
4186
4187         return 0;
4188
4189  out_remove_sysfs:
4190         destroy_workqueue(priv->workqueue);
4191         priv->workqueue = NULL;
4192         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4193  out_release_irq:
4194         free_irq(priv->pci_dev->irq, priv);
4195  out_disable_msi:
4196         pci_disable_msi(priv->pci_dev);
4197         iwlcore_free_geos(priv);
4198         iwl_free_channel_map(priv);
4199  out_unset_hw_params:
4200         iwl3945_unset_hw_params(priv);
4201  out_eeprom_free:
4202         iwl_eeprom_free(priv);
4203  out_iounmap:
4204         pci_iounmap(pdev, priv->hw_base);
4205  out_pci_release_regions:
4206         pci_release_regions(pdev);
4207  out_pci_disable_device:
4208         pci_set_drvdata(pdev, NULL);
4209         pci_disable_device(pdev);
4210  out_ieee80211_free_hw:
4211         ieee80211_free_hw(priv->hw);
4212  out:
4213         return err;
4214 }
4215
4216 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4217 {
4218         struct iwl_priv *priv = pci_get_drvdata(pdev);
4219         unsigned long flags;
4220
4221         if (!priv)
4222                 return;
4223
4224         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4225
4226         iwl_dbgfs_unregister(priv);
4227
4228         set_bit(STATUS_EXIT_PENDING, &priv->status);
4229
4230         if (priv->mac80211_registered) {
4231                 ieee80211_unregister_hw(priv->hw);
4232                 priv->mac80211_registered = 0;
4233         } else {
4234                 iwl3945_down(priv);
4235         }
4236
4237         /* make sure we flush any pending irq or
4238          * tasklet for the driver
4239          */
4240         spin_lock_irqsave(&priv->lock, flags);
4241         iwl_disable_interrupts(priv);
4242         spin_unlock_irqrestore(&priv->lock, flags);
4243
4244         iwl_synchronize_irq(priv);
4245
4246         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4247
4248         cancel_delayed_work_sync(&priv->rfkill_poll);
4249
4250         iwl3945_dealloc_ucode_pci(priv);
4251
4252         if (priv->rxq.bd)
4253                 iwl3945_rx_queue_free(priv, &priv->rxq);
4254         iwl3945_hw_txq_ctx_free(priv);
4255
4256         iwl3945_unset_hw_params(priv);
4257         iwl_clear_stations_table(priv);
4258
4259         /*netif_stop_queue(dev); */
4260         flush_workqueue(priv->workqueue);
4261
4262         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4263          * priv->workqueue... so we can't take down the workqueue
4264          * until now... */
4265         destroy_workqueue(priv->workqueue);
4266         priv->workqueue = NULL;
4267
4268         free_irq(pdev->irq, priv);
4269         pci_disable_msi(pdev);
4270
4271         pci_iounmap(pdev, priv->hw_base);
4272         pci_release_regions(pdev);
4273         pci_disable_device(pdev);
4274         pci_set_drvdata(pdev, NULL);
4275
4276         iwl_free_channel_map(priv);
4277         iwlcore_free_geos(priv);
4278         kfree(priv->scan);
4279         if (priv->ibss_beacon)
4280                 dev_kfree_skb(priv->ibss_beacon);
4281
4282         ieee80211_free_hw(priv->hw);
4283 }
4284
4285
4286 /*****************************************************************************
4287  *
4288  * driver and module entry point
4289  *
4290  *****************************************************************************/
4291
4292 static struct pci_driver iwl3945_driver = {
4293         .name = DRV_NAME,
4294         .id_table = iwl3945_hw_card_ids,
4295         .probe = iwl3945_pci_probe,
4296         .remove = __devexit_p(iwl3945_pci_remove),
4297 #ifdef CONFIG_PM
4298         .suspend = iwl_pci_suspend,
4299         .resume = iwl_pci_resume,
4300 #endif
4301 };
4302
4303 static int __init iwl3945_init(void)
4304 {
4305
4306         int ret;
4307         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4308         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4309
4310         ret = iwl3945_rate_control_register();
4311         if (ret) {
4312                 printk(KERN_ERR DRV_NAME
4313                        "Unable to register rate control algorithm: %d\n", ret);
4314                 return ret;
4315         }
4316
4317         ret = pci_register_driver(&iwl3945_driver);
4318         if (ret) {
4319                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4320                 goto error_register;
4321         }
4322
4323         return ret;
4324
4325 error_register:
4326         iwl3945_rate_control_unregister();
4327         return ret;
4328 }
4329
4330 static void __exit iwl3945_exit(void)
4331 {
4332         pci_unregister_driver(&iwl3945_driver);
4333         iwl3945_rate_control_unregister();
4334 }
4335
4336 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4337
4338 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4339 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4340 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4341 MODULE_PARM_DESC(swcrypto,
4342                  "using software crypto (default 1 [software])\n");
4343 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
4344 MODULE_PARM_DESC(debug, "debug output mask");
4345 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4346 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4347
4348 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
4349 MODULE_PARM_DESC(queues_num, "number of hw queues.");
4350
4351 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4352 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4353
4354 module_exit(iwl3945_exit);
4355 module_init(iwl3945_init);