SAFE public projects git trees. - safe/jmp/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/sched.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/ieee80211_radiotap.h>
  45 #include <net/lib80211.h>
  46 #include <net/mac80211.h>
  47
  48 #include <asm/div64.h>
  49
  50 #define DRV_NAME        "iwl3945"
  51
  52 #include "iwl-fh.h"
  53 #include "iwl-3945-fh.h"
  54 #include "iwl-commands.h"
  55 #include "iwl-sta.h"
  56 #include "iwl-3945.h"
  57 #include "iwl-helpers.h"
  58 #include "iwl-core.h"
  59 #include "iwl-dev.h"
  60
  61 /*
  62  * module name, copyright, version, etc.
  63  */
  64
  65 #define DRV_DESCRIPTION \
  66 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  67
  68 #ifdef CONFIG_IWLWIFI_DEBUG
  69 #define VD "d"
  70 #else
  71 #define VD
  72 #endif
  73
  74 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  75 #define VS "s"
  76 #else
  77 #define VS
  78 #endif
  79
  80 #define IWL39_VERSION "1.2.26k" VD VS
  81 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  82 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  83 #define DRV_VERSION     IWL39_VERSION
  84
  85
  86 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  87 MODULE_VERSION(DRV_VERSION);
  88 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  89 MODULE_LICENSE("GPL");
  90
  91  /* module parameters */
  92 struct iwl_mod_params iwl3945_mod_params = {
  93         .num_of_queues = IWL39_NUM_QUEUES, /* Not used */
  94         .sw_crypto = 1,
  95         .restart_fw = 1,
  96         /* the rest are 0 by default */
  97 };
  98
  99 /**
 100  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 101  * @priv: eeprom and antenna fields are used to determine antenna flags
 102  *
 103  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 104  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 105  *
 106  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 107  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 108  * IWL_ANTENNA_AUX       - Force AUX antenna
 109  */
 110 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 111 {
 112         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 113
 114         switch (iwl3945_mod_params.antenna) {
 115         case IWL_ANTENNA_DIVERSITY:
 116                 return 0;
 117
 118         case IWL_ANTENNA_MAIN:
 119                 if (eeprom->antenna_switch_type)
 120                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 121                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 122
 123         case IWL_ANTENNA_AUX:
 124                 if (eeprom->antenna_switch_type)
 125                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 126                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 127         }
 128
 129         /* bad antenna selector value */
 130         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 131                 iwl3945_mod_params.antenna);
 132
 133         return 0;               /* "diversity" is default if error */
 134 }
 135
 136 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 137                                    struct ieee80211_key_conf *keyconf,
 138                                    u8 sta_id)
 139 {
 140         unsigned long flags;
 141         __le16 key_flags = 0;
 142         int ret;
 143
 144         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 145         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 146
 147         if (sta_id == priv->hw_params.bcast_sta_id)
 148                 key_flags |= STA_KEY_MULTICAST_MSK;
 149
 150         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 151         keyconf->hw_key_idx = keyconf->keyidx;
 152         key_flags &= ~STA_KEY_FLG_INVALID;
 153
 154         spin_lock_irqsave(&priv->sta_lock, flags);
 155         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 156         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 157         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 158                keyconf->keylen);
 159
 160         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 161                keyconf->keylen);
 162
 163         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 164                         == STA_KEY_FLG_NO_ENC)
 165                 priv->stations[sta_id].sta.key.key_offset =
 166                                  iwl_get_free_ucode_key_index(priv);
 167         /* else, we are overriding an existing key => no need to allocated room
 168         * in uCode. */
 169
 170         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 171                 "no space for a new key");
 172
 173         priv->stations[sta_id].sta.key.key_flags = key_flags;
 174         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 175         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 176
 177         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 178
 179         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 180
 181         spin_unlock_irqrestore(&priv->sta_lock, flags);
 182
 183         return ret;
 184 }
 185
 186 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 187                                   struct ieee80211_key_conf *keyconf,
 188                                   u8 sta_id)
 189 {
 190         return -EOPNOTSUPP;
 191 }
 192
 193 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 194                                   struct ieee80211_key_conf *keyconf,
 195                                   u8 sta_id)
 196 {
 197         return -EOPNOTSUPP;
 198 }
 199
 200 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 201 {
 202         unsigned long flags;
 203
 204         spin_lock_irqsave(&priv->sta_lock, flags);
 205         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 206         memset(&priv->stations[sta_id].sta.key, 0,
 207                 sizeof(struct iwl4965_keyinfo));
 208         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 209         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 210         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 211         spin_unlock_irqrestore(&priv->sta_lock, flags);
 212
 213         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 214         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 215         return 0;
 216 }
 217
 218 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 219                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 220 {
 221         int ret = 0;
 222
 223         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 224
 225         switch (keyconf->alg) {
 226         case ALG_CCMP:
 227                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 228                 break;
 229         case ALG_TKIP:
 230                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 231                 break;
 232         case ALG_WEP:
 233                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 234                 break;
 235         default:
 236                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 237                 ret = -EINVAL;
 238         }
 239
 240         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 241                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 242                       sta_id, ret);
 243
 244         return ret;
 245 }
 246
 247 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 248 {
 249         int ret = -EOPNOTSUPP;
 250
 251         return ret;
 252 }
 253
 254 static int iwl3945_set_static_key(struct iwl_priv *priv,
 255                                 struct ieee80211_key_conf *key)
 256 {
 257         if (key->alg == ALG_WEP)
 258                 return -EOPNOTSUPP;
 259
 260         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 261         return -EINVAL;
 262 }
 263
 264 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 265 {
 266         struct list_head *element;
 267
 268         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 269                        priv->frames_count);
 270
 271         while (!list_empty(&priv->free_frames)) {
 272                 element = priv->free_frames.next;
 273                 list_del(element);
 274                 kfree(list_entry(element, struct iwl3945_frame, list));
 275                 priv->frames_count--;
 276         }
 277
 278         if (priv->frames_count) {
 279                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 280                             priv->frames_count);
 281                 priv->frames_count = 0;
 282         }
 283 }
 284
 285 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 286 {
 287         struct iwl3945_frame *frame;
 288         struct list_head *element;
 289         if (list_empty(&priv->free_frames)) {
 290                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 291                 if (!frame) {
 292                         IWL_ERR(priv, "Could not allocate frame!\n");
 293                         return NULL;
 294                 }
 295
 296                 priv->frames_count++;
 297                 return frame;
 298         }
 299
 300         element = priv->free_frames.next;
 301         list_del(element);
 302         return list_entry(element, struct iwl3945_frame, list);
 303 }
 304
 305 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 306 {
 307         memset(frame, 0, sizeof(*frame));
 308         list_add(&frame->list, &priv->free_frames);
 309 }
 310
 311 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 312                                 struct ieee80211_hdr *hdr,
 313                                 int left)
 314 {
 315
 316         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 317             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 318              (priv->iw_mode != NL80211_IFTYPE_AP)))
 319                 return 0;
 320
 321         if (priv->ibss_beacon->len > left)
 322                 return 0;
 323
 324         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 325
 326         return priv->ibss_beacon->len;
 327 }
 328
 329 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 330 {
 331         struct iwl3945_frame *frame;
 332         unsigned int frame_size;
 333         int rc;
 334         u8 rate;
 335
 336         frame = iwl3945_get_free_frame(priv);
 337
 338         if (!frame) {
 339                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 340                           "command.\n");
 341                 return -ENOMEM;
 342         }
 343
 344         rate = iwl_rate_get_lowest_plcp(priv);
 345
 346         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 347
 348         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 349                               &frame->u.cmd[0]);
 350
 351         iwl3945_free_frame(priv, frame);
 352
 353         return rc;
 354 }
 355
 356 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 357 {
 358         if (priv->shared_virt)
 359                 pci_free_consistent(priv->pci_dev,
 360                                     sizeof(struct iwl3945_shared),
 361                                     priv->shared_virt,
 362                                     priv->shared_phys);
 363 }
 364
 365 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 366                                       struct ieee80211_tx_info *info,
 367                                       struct iwl_device_cmd *cmd,
 368                                       struct sk_buff *skb_frag,
 369                                       int sta_id)
 370 {
 371         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 372         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 373
 374         switch (keyinfo->alg) {
 375         case ALG_CCMP:
 376                 tx->sec_ctl = TX_CMD_SEC_CCM;
 377                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 378                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 379                 break;
 380
 381         case ALG_TKIP:
 382                 break;
 383
 384         case ALG_WEP:
 385                 tx->sec_ctl = TX_CMD_SEC_WEP |
 386                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 387
 388                 if (keyinfo->keylen == 13)
 389                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 390
 391                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 392
 393                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 394                              "with key %d\n", info->control.hw_key->hw_key_idx);
 395                 break;
 396
 397         default:
 398                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 399                 break;
 400         }
 401 }
 402
 403 /*
 404  * handle build REPLY_TX command notification.
 405  */
 406 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 407                                   struct iwl_device_cmd *cmd,
 408                                   struct ieee80211_tx_info *info,
 409                                   struct ieee80211_hdr *hdr, u8 std_id)
 410 {
 411         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 412         __le32 tx_flags = tx->tx_flags;
 413         __le16 fc = hdr->frame_control;
 414         u8 rc_flags = info->control.rates[0].flags;
 415
 416         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 417         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 418                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 419                 if (ieee80211_is_mgmt(fc))
 420                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 421                 if (ieee80211_is_probe_resp(fc) &&
 422                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 423                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 424         } else {
 425                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 426                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 427         }
 428
 429         tx->sta_id = std_id;
 430         if (ieee80211_has_morefrags(fc))
 431                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 432
 433         if (ieee80211_is_data_qos(fc)) {
 434                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 435                 tx->tid_tspec = qc[0] & 0xf;
 436                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 437         } else {
 438                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 439         }
 440
 441         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 442                 tx_flags |= TX_CMD_FLG_RTS_MSK;
 443                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 444         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 445                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 446                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 447         }
 448
 449         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 450                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 451
 452         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 453         if (ieee80211_is_mgmt(fc)) {
 454                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 455                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
 456                 else
 457                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
 458         } else {
 459                 tx->timeout.pm_frame_timeout = 0;
 460 #ifdef CONFIG_IWLWIFI_LEDS
 461                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
 462 #endif
 463         }
 464
 465         tx->driver_txop = 0;
 466         tx->tx_flags = tx_flags;
 467         tx->next_frame_len = 0;
 468 }
 469
 470 /*
 471  * start REPLY_TX command process
 472  */
 473 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 474 {
 475         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 476         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 477         struct iwl3945_tx_cmd *tx;
 478         struct iwl_tx_queue *txq = NULL;
 479         struct iwl_queue *q = NULL;
 480         struct iwl_device_cmd *out_cmd;
 481         struct iwl_cmd_meta *out_meta;
 482         dma_addr_t phys_addr;
 483         dma_addr_t txcmd_phys;
 484         int txq_id = skb_get_queue_mapping(skb);
 485         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 486         u8 id;
 487         u8 unicast;
 488         u8 sta_id;
 489         u8 tid = 0;
 490         u16 seq_number = 0;
 491         __le16 fc;
 492         u8 wait_write_ptr = 0;
 493         u8 *qc = NULL;
 494         unsigned long flags;
 495         int rc;
 496
 497         spin_lock_irqsave(&priv->lock, flags);
 498         if (iwl_is_rfkill(priv)) {
 499                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 500                 goto drop_unlock;
 501         }
 502
 503         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 504                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 505                 goto drop_unlock;
 506         }
 507
 508         unicast = !is_multicast_ether_addr(hdr->addr1);
 509         id = 0;
 510
 511         fc = hdr->frame_control;
 512
 513 #ifdef CONFIG_IWLWIFI_DEBUG
 514         if (ieee80211_is_auth(fc))
 515                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 516         else if (ieee80211_is_assoc_req(fc))
 517                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 518         else if (ieee80211_is_reassoc_req(fc))
 519                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 520 #endif
 521
 522         /* drop all non-injected data frame if we are not associated */
 523         if (ieee80211_is_data(fc) &&
 524             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
 525             (!iwl_is_associated(priv) ||
 526              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 527                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 528                 goto drop_unlock;
 529         }
 530
 531         spin_unlock_irqrestore(&priv->lock, flags);
 532
 533         hdr_len = ieee80211_hdrlen(fc);
 534
 535         /* Find (or create) index into station table for destination station */
 536         if (info->flags & IEEE80211_TX_CTL_INJECTED)
 537                 sta_id = priv->hw_params.bcast_sta_id;
 538         else
 539                 sta_id = iwl_get_sta_id(priv, hdr);
 540         if (sta_id == IWL_INVALID_STATION) {
 541                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 542                                hdr->addr1);
 543                 goto drop;
 544         }
 545
 546         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 547
 548         if (ieee80211_is_data_qos(fc)) {
 549                 qc = ieee80211_get_qos_ctl(hdr);
 550                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 551                 if (unlikely(tid >= MAX_TID_COUNT))
 552                         goto drop;
 553                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 554                                 IEEE80211_SCTL_SEQ;
 555                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 556                         (hdr->seq_ctrl &
 557                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 558                 seq_number += 0x10;
 559         }
 560
 561         /* Descriptor for chosen Tx queue */
 562         txq = &priv->txq[txq_id];
 563         q = &txq->q;
 564
 565         spin_lock_irqsave(&priv->lock, flags);
 566
 567         idx = get_cmd_index(q, q->write_ptr, 0);
 568
 569         /* Set up driver data for this TFD */
 570         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 571         txq->txb[q->write_ptr].skb[0] = skb;
 572
 573         /* Init first empty entry in queue's array of Tx/cmd buffers */
 574         out_cmd = txq->cmd[idx];
 575         out_meta = &txq->meta[idx];
 576         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 577         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 578         memset(tx, 0, sizeof(*tx));
 579
 580         /*
 581          * Set up the Tx-command (not MAC!) header.
 582          * Store the chosen Tx queue and TFD index within the sequence field;
 583          * after Tx, uCode's Tx response will return this value so driver can
 584          * locate the frame within the tx queue and do post-tx processing.
 585          */
 586         out_cmd->hdr.cmd = REPLY_TX;
 587         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 588                                 INDEX_TO_SEQ(q->write_ptr)));
 589
 590         /* Copy MAC header from skb into command buffer */
 591         memcpy(tx->hdr, hdr, hdr_len);
 592
 593
 594         if (info->control.hw_key)
 595                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 596
 597         /* TODO need this for burst mode later on */
 598         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 599
 600         /* set is_hcca to 0; it probably will never be implemented */
 601         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 602
 603         /* Total # bytes to be transmitted */
 604         len = (u16)skb->len;
 605         tx->len = cpu_to_le16(len);
 606
 607         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 608         iwl_update_stats(priv, true, fc, len);
 609         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 610         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 611
 612         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 613                 txq->need_update = 1;
 614                 if (qc)
 615                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 616         } else {
 617                 wait_write_ptr = 1;
 618                 txq->need_update = 0;
 619         }
 620
 621         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 622                      le16_to_cpu(out_cmd->hdr.sequence));
 623         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 624         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 625         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 626                            ieee80211_hdrlen(fc));
 627
 628         /*
 629          * Use the first empty entry in this queue's command buffer array
 630          * to contain the Tx command and MAC header concatenated together
 631          * (payload data will be in another buffer).
 632          * Size of this varies, due to varying MAC header length.
 633          * If end is not dword aligned, we'll have 2 extra bytes at the end
 634          * of the MAC header (device reads on dword boundaries).
 635          * We'll tell device about this padding later.
 636          */
 637         len = sizeof(struct iwl3945_tx_cmd) +
 638                         sizeof(struct iwl_cmd_header) + hdr_len;
 639
 640         len_org = len;
 641         len = (len + 3) & ~3;
 642
 643         if (len_org != len)
 644                 len_org = 1;
 645         else
 646                 len_org = 0;
 647
 648         /* Physical address of this Tx command's header (not MAC header!),
 649          * within command buffer array. */
 650         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 651                                     len, PCI_DMA_TODEVICE);
 652         /* we do not map meta data ... so we can safely access address to
 653          * provide to unmap command*/
 654         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 655         pci_unmap_len_set(out_meta, len, len);
 656
 657         /* Add buffer containing Tx command and MAC(!) header to TFD's
 658          * first entry */
 659         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 660                                                    txcmd_phys, len, 1, 0);
 661
 662
 663         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 664          * if any (802.11 null frames have no payload). */
 665         len = skb->len - hdr_len;
 666         if (len) {
 667                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 668                                            len, PCI_DMA_TODEVICE);
 669                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 670                                                            phys_addr, len,
 671                                                            0, U32_PAD(len));
 672         }
 673
 674
 675         /* Tell device the write index *just past* this latest filled TFD */
 676         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 677         rc = iwl_txq_update_write_ptr(priv, txq);
 678         spin_unlock_irqrestore(&priv->lock, flags);
 679
 680         if (rc)
 681                 return rc;
 682
 683         if ((iwl_queue_space(q) < q->high_mark)
 684             && priv->mac80211_registered) {
 685                 if (wait_write_ptr) {
 686                         spin_lock_irqsave(&priv->lock, flags);
 687                         txq->need_update = 1;
 688                         iwl_txq_update_write_ptr(priv, txq);
 689                         spin_unlock_irqrestore(&priv->lock, flags);
 690                 }
 691
 692                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 693         }
 694
 695         return 0;
 696
 697 drop_unlock:
 698         spin_unlock_irqrestore(&priv->lock, flags);
 699 drop:
 700         return -1;
 701 }
 702
 703 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 704
 705 #include "iwl-spectrum.h"
 706
 707 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 708 #define BEACON_TIME_MASK_HIGH   0xFF000000
 709 #define TIME_UNIT               1024
 710
 711 /*
 712  * extended beacon time format
 713  * time in usec will be changed into a 32-bit value in 8:24 format
 714  * the high 1 byte is the beacon counts
 715  * the lower 3 bytes is the time in usec within one beacon interval
 716  */
 717
 718 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 719 {
 720         u32 quot;
 721         u32 rem;
 722         u32 interval = beacon_interval * 1024;
 723
 724         if (!interval || !usec)
 725                 return 0;
 726
 727         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 728         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 729
 730         return (quot << 24) + rem;
 731 }
 732
 733 /* base is usually what we get from ucode with each received frame,
 734  * the same as HW timer counter counting down
 735  */
 736
 737 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 738 {
 739         u32 base_low = base & BEACON_TIME_MASK_LOW;
 740         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 741         u32 interval = beacon_interval * TIME_UNIT;
 742         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 743             (addon & BEACON_TIME_MASK_HIGH);
 744
 745         if (base_low > addon_low)
 746                 res += base_low - addon_low;
 747         else if (base_low < addon_low) {
 748                 res += interval + base_low - addon_low;
 749                 res += (1 << 24);
 750         } else
 751                 res += (1 << 24);
 752
 753         return cpu_to_le32(res);
 754 }
 755
 756 static int iwl3945_get_measurement(struct iwl_priv *priv,
 757                                struct ieee80211_measurement_params *params,
 758                                u8 type)
 759 {
 760         struct iwl_spectrum_cmd spectrum;
 761         struct iwl_rx_packet *res;
 762         struct iwl_host_cmd cmd = {
 763                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 764                 .data = (void *)&spectrum,
 765                 .flags = CMD_WANT_SKB,
 766         };
 767         u32 add_time = le64_to_cpu(params->start_time);
 768         int rc;
 769         int spectrum_resp_status;
 770         int duration = le16_to_cpu(params->duration);
 771
 772         if (iwl_is_associated(priv))
 773                 add_time =
 774                     iwl3945_usecs_to_beacons(
 775                         le64_to_cpu(params->start_time) - priv->last_tsf,
 776                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 777
 778         memset(&spectrum, 0, sizeof(spectrum));
 779
 780         spectrum.channel_count = cpu_to_le16(1);
 781         spectrum.flags =
 782             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 783         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 784         cmd.len = sizeof(spectrum);
 785         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 786
 787         if (iwl_is_associated(priv))
 788                 spectrum.start_time =
 789                     iwl3945_add_beacon_time(priv->last_beacon_time,
 790                                 add_time,
 791                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 792         else
 793                 spectrum.start_time = 0;
 794
 795         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 796         spectrum.channels[0].channel = params->channel;
 797         spectrum.channels[0].type = type;
 798         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 799                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 800                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 801
 802         rc = iwl_send_cmd_sync(priv, &cmd);
 803         if (rc)
 804                 return rc;
 805
 806         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
 807         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 808                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 809                 rc = -EIO;
 810         }
 811
 812         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
 813         switch (spectrum_resp_status) {
 814         case 0:         /* Command will be handled */
 815                 if (res->u.spectrum.id != 0xff) {
 816                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 817                                                 res->u.spectrum.id);
 818                         priv->measurement_status &= ~MEASUREMENT_READY;
 819                 }
 820                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 821                 rc = 0;
 822                 break;
 823
 824         case 1:         /* Command will not be handled */
 825                 rc = -EAGAIN;
 826                 break;
 827         }
 828
 829         dev_kfree_skb_any(cmd.reply_skb);
 830
 831         return rc;
 832 }
 833 #endif
 834
 835 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 836                                struct iwl_rx_mem_buffer *rxb)
 837 {
 838         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 839         struct iwl_alive_resp *palive;
 840         struct delayed_work *pwork;
 841
 842         palive = &pkt->u.alive_frame;
 843
 844         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 845                        "0x%01X 0x%01X\n",
 846                        palive->is_valid, palive->ver_type,
 847                        palive->ver_subtype);
 848
 849         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 850                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 851                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 852                        sizeof(struct iwl_alive_resp));
 853                 pwork = &priv->init_alive_start;
 854         } else {
 855                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 856                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 857                        sizeof(struct iwl_alive_resp));
 858                 pwork = &priv->alive_start;
 859                 iwl3945_disable_events(priv);
 860         }
 861
 862         /* We delay the ALIVE response by 5ms to
 863          * give the HW RF Kill time to activate... */
 864         if (palive->is_valid == UCODE_VALID_OK)
 865                 queue_delayed_work(priv->workqueue, pwork,
 866                                    msecs_to_jiffies(5));
 867         else
 868                 IWL_WARN(priv, "uCode did not respond OK.\n");
 869 }
 870
 871 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 872                                  struct iwl_rx_mem_buffer *rxb)
 873 {
 874 #ifdef CONFIG_IWLWIFI_DEBUG
 875         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 876 #endif
 877
 878         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 879         return;
 880 }
 881
 882 static void iwl3945_bg_beacon_update(struct work_struct *work)
 883 {
 884         struct iwl_priv *priv =
 885                 container_of(work, struct iwl_priv, beacon_update);
 886         struct sk_buff *beacon;
 887
 888         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 889         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 890
 891         if (!beacon) {
 892                 IWL_ERR(priv, "update beacon failed\n");
 893                 return;
 894         }
 895
 896         mutex_lock(&priv->mutex);
 897         /* new beacon skb is allocated every time; dispose previous.*/
 898         if (priv->ibss_beacon)
 899                 dev_kfree_skb(priv->ibss_beacon);
 900
 901         priv->ibss_beacon = beacon;
 902         mutex_unlock(&priv->mutex);
 903
 904         iwl3945_send_beacon_cmd(priv);
 905 }
 906
 907 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 908                                 struct iwl_rx_mem_buffer *rxb)
 909 {
 910 #ifdef CONFIG_IWLWIFI_DEBUG
 911         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 912         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 913         u8 rate = beacon->beacon_notify_hdr.rate;
 914
 915         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 916                 "tsf %d %d rate %d\n",
 917                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 918                 beacon->beacon_notify_hdr.failure_frame,
 919                 le32_to_cpu(beacon->ibss_mgr_status),
 920                 le32_to_cpu(beacon->high_tsf),
 921                 le32_to_cpu(beacon->low_tsf), rate);
 922 #endif
 923
 924         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 925             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 926                 queue_work(priv->workqueue, &priv->beacon_update);
 927 }
 928
 929 /* Handle notification from uCode that card's power state is changing
 930  * due to software, hardware, or critical temperature RFKILL */
 931 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 932                                     struct iwl_rx_mem_buffer *rxb)
 933 {
 934         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 935         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 936         unsigned long status = priv->status;
 937
 938         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 939                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 940                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 941
 942         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 943                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 944
 945         if (flags & HW_CARD_DISABLED)
 946                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 947         else
 948                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 949
 950
 951         iwl_scan_cancel(priv);
 952
 953         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 954              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 955                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 956                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 957         else
 958                 wake_up_interruptible(&priv->wait_command_queue);
 959 }
 960
 961 /**
 962  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 963  *
 964  * Setup the RX handlers for each of the reply types sent from the uCode
 965  * to the host.
 966  *
 967  * This function chains into the hardware specific files for them to setup
 968  * any hardware specific handlers as well.
 969  */
 970 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 971 {
 972         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 973         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 974         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 975         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 976         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 977         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 978             iwl_rx_pm_debug_statistics_notif;
 979         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 980
 981         /*
 982          * The same handler is used for both the REPLY to a discrete
 983          * statistics request from the host as well as for the periodic
 984          * statistics notifications (after received beacons) from the uCode.
 985          */
 986         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 987         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 988
 989         iwl_setup_spectrum_handlers(priv);
 990         iwl_setup_rx_scan_handlers(priv);
 991         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 992
 993         /* Set up hardware specific Rx handlers */
 994         iwl3945_hw_rx_handler_setup(priv);
 995 }
 996
 997 /************************** RX-FUNCTIONS ****************************/
 998 /*
 999  * Rx theory of operation
1000  *
1001  * The host allocates 32 DMA target addresses and passes the host address
1002  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1003  * 0 to 31
1004  *
1005  * Rx Queue Indexes
1006  * The host/firmware share two index registers for managing the Rx buffers.
1007  *
1008  * The READ index maps to the first position that the firmware may be writing
1009  * to -- the driver can read up to (but not including) this position and get
1010  * good data.
1011  * The READ index is managed by the firmware once the card is enabled.
1012  *
1013  * The WRITE index maps to the last position the driver has read from -- the
1014  * position preceding WRITE is the last slot the firmware can place a packet.
1015  *
1016  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1017  * WRITE = READ.
1018  *
1019  * During initialization, the host sets up the READ queue position to the first
1020  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1021  *
1022  * When the firmware places a packet in a buffer, it will advance the READ index
1023  * and fire the RX interrupt.  The driver can then query the READ index and
1024  * process as many packets as possible, moving the WRITE index forward as it
1025  * resets the Rx queue buffers with new memory.
1026  *
1027  * The management in the driver is as follows:
1028  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1029  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1030  *   to replenish the iwl->rxq->rx_free.
1031  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1032  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1033  *   'processed' and 'read' driver indexes as well)
1034  * + A received packet is processed and handed to the kernel network stack,
1035  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1036  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1037  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1038  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1039  *   were enough free buffers and RX_STALLED is set it is cleared.
1040  *
1041  *
1042  * Driver sequence:
1043  *
1044  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1045  *                            iwl3945_rx_queue_restock
1046  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1047  *                            queue, updates firmware pointers, and updates
1048  *                            the WRITE index.  If insufficient rx_free buffers
1049  *                            are available, schedules iwl3945_rx_replenish
1050  *
1051  * -- enable interrupts --
1052  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1053  *                            READ INDEX, detaching the SKB from the pool.
1054  *                            Moves the packet buffer from queue to rx_used.
1055  *                            Calls iwl3945_rx_queue_restock to refill any empty
1056  *                            slots.
1057  * ...
1058  *
1059  */
1060
1061 /**
1062  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1063  */
1064 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1065                                           dma_addr_t dma_addr)
1066 {
1067         return cpu_to_le32((u32)dma_addr);
1068 }
1069
1070 /**
1071  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1072  *
1073  * If there are slots in the RX queue that need to be restocked,
1074  * and we have free pre-allocated buffers, fill the ranks as much
1075  * as we can, pulling from rx_free.
1076  *
1077  * This moves the 'write' index forward to catch up with 'processed', and
1078  * also updates the memory address in the firmware to reference the new
1079  * target buffer.
1080  */
1081 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1082 {
1083         struct iwl_rx_queue *rxq = &priv->rxq;
1084         struct list_head *element;
1085         struct iwl_rx_mem_buffer *rxb;
1086         unsigned long flags;
1087         int write, rc;
1088
1089         spin_lock_irqsave(&rxq->lock, flags);
1090         write = rxq->write & ~0x7;
1091         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1092                 /* Get next free Rx buffer, remove from free list */
1093                 element = rxq->rx_free.next;
1094                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1095                 list_del(element);
1096
1097                 /* Point to Rx buffer via next RBD in circular buffer */
1098                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1099                 rxq->queue[rxq->write] = rxb;
1100                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1101                 rxq->free_count--;
1102         }
1103         spin_unlock_irqrestore(&rxq->lock, flags);
1104         /* If the pre-allocated buffer pool is dropping low, schedule to
1105          * refill it */
1106         if (rxq->free_count <= RX_LOW_WATERMARK)
1107                 queue_work(priv->workqueue, &priv->rx_replenish);
1108
1109
1110         /* If we've added more space for the firmware to place data, tell it.
1111          * Increment device's write pointer in multiples of 8. */
1112         if ((rxq->write_actual != (rxq->write & ~0x7))
1113             || (abs(rxq->write - rxq->read) > 7)) {
1114                 spin_lock_irqsave(&rxq->lock, flags);
1115                 rxq->need_update = 1;
1116                 spin_unlock_irqrestore(&rxq->lock, flags);
1117                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1118                 if (rc)
1119                         return rc;
1120         }
1121
1122         return 0;
1123 }
1124
1125 /**
1126  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1127  *
1128  * When moving to rx_free an SKB is allocated for the slot.
1129  *
1130  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1131  * This is called as a scheduled work item (except for during initialization)
1132  */
1133 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1134 {
1135         struct iwl_rx_queue *rxq = &priv->rxq;
1136         struct list_head *element;
1137         struct iwl_rx_mem_buffer *rxb;
1138         struct sk_buff *skb;
1139         unsigned long flags;
1140
1141         while (1) {
1142                 spin_lock_irqsave(&rxq->lock, flags);
1143
1144                 if (list_empty(&rxq->rx_used)) {
1145                         spin_unlock_irqrestore(&rxq->lock, flags);
1146                         return;
1147                 }
1148                 spin_unlock_irqrestore(&rxq->lock, flags);
1149
1150                 if (rxq->free_count > RX_LOW_WATERMARK)
1151                         priority |= __GFP_NOWARN;
1152                 /* Alloc a new receive buffer */
1153                 skb = alloc_skb(priv->hw_params.rx_buf_size, priority);
1154                 if (!skb) {
1155                         if (net_ratelimit())
1156                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1157                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1158                             net_ratelimit())
1159                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1160                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1161                                          rxq->free_count);
1162                         /* We don't reschedule replenish work here -- we will
1163                          * call the restock method and if it still needs
1164                          * more buffers it will schedule replenish */
1165                         break;
1166                 }
1167
1168                 spin_lock_irqsave(&rxq->lock, flags);
1169                 if (list_empty(&rxq->rx_used)) {
1170                         spin_unlock_irqrestore(&rxq->lock, flags);
1171                         dev_kfree_skb_any(skb);
1172                         return;
1173                 }
1174                 element = rxq->rx_used.next;
1175                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1176                 list_del(element);
1177                 spin_unlock_irqrestore(&rxq->lock, flags);
1178
1179                 rxb->skb = skb;
1180
1181                 /* If radiotap head is required, reserve some headroom here.
1182                  * The physical head count is a variable rx_stats->phy_count.
1183                  * We reserve 4 bytes here. Plus these extra bytes, the
1184                  * headroom of the physical head should be enough for the
1185                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1186                  */
1187                 skb_reserve(rxb->skb, 4);
1188
1189                 /* Get physical address of RB/SKB */
1190                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1191                                                 rxb->skb->data,
1192                                                 priv->hw_params.rx_buf_size,
1193                                                 PCI_DMA_FROMDEVICE);
1194
1195                 spin_lock_irqsave(&rxq->lock, flags);
1196                 list_add_tail(&rxb->list, &rxq->rx_free);
1197                 priv->alloc_rxb_skb++;
1198                 rxq->free_count++;
1199                 spin_unlock_irqrestore(&rxq->lock, flags);
1200         }
1201 }
1202
1203 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1204 {
1205         unsigned long flags;
1206         int i;
1207         spin_lock_irqsave(&rxq->lock, flags);
1208         INIT_LIST_HEAD(&rxq->rx_free);
1209         INIT_LIST_HEAD(&rxq->rx_used);
1210         /* Fill the rx_used queue with _all_ of the Rx buffers */
1211         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1212                 /* In the reset function, these buffers may have been allocated
1213                  * to an SKB, so we need to unmap and free potential storage */
1214                 if (rxq->pool[i].skb != NULL) {
1215                         pci_unmap_single(priv->pci_dev,
1216                                          rxq->pool[i].real_dma_addr,
1217                                          priv->hw_params.rx_buf_size,
1218                                          PCI_DMA_FROMDEVICE);
1219                         priv->alloc_rxb_skb--;
1220                         dev_kfree_skb(rxq->pool[i].skb);
1221                         rxq->pool[i].skb = NULL;
1222                 }
1223                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1224         }
1225
1226         /* Set us so that we have processed and used all buffers, but have
1227          * not restocked the Rx queue with fresh buffers */
1228         rxq->read = rxq->write = 0;
1229         rxq->free_count = 0;
1230         rxq->write_actual = 0;
1231         spin_unlock_irqrestore(&rxq->lock, flags);
1232 }
1233
1234 void iwl3945_rx_replenish(void *data)
1235 {
1236         struct iwl_priv *priv = data;
1237         unsigned long flags;
1238
1239         iwl3945_rx_allocate(priv, GFP_KERNEL);
1240
1241         spin_lock_irqsave(&priv->lock, flags);
1242         iwl3945_rx_queue_restock(priv);
1243         spin_unlock_irqrestore(&priv->lock, flags);
1244 }
1245
1246 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1247 {
1248         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1249
1250         iwl3945_rx_queue_restock(priv);
1251 }
1252
1253
1254 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1255  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1256  * This free routine walks the list of POOL entries and if SKB is set to
1257  * non NULL it is unmapped and freed
1258  */
1259 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1260 {
1261         int i;
1262         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1263                 if (rxq->pool[i].skb != NULL) {
1264                         pci_unmap_single(priv->pci_dev,
1265                                          rxq->pool[i].real_dma_addr,
1266                                          priv->hw_params.rx_buf_size,
1267                                          PCI_DMA_FROMDEVICE);
1268                         dev_kfree_skb(rxq->pool[i].skb);
1269                 }
1270         }
1271
1272         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1273                             rxq->dma_addr);
1274         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1275                             rxq->rb_stts, rxq->rb_stts_dma);
1276         rxq->bd = NULL;
1277         rxq->rb_stts  = NULL;
1278 }
1279
1280
1281 /* Convert linear signal-to-noise ratio into dB */
1282 static u8 ratio2dB[100] = {
1283 /*       0   1   2   3   4   5   6   7   8   9 */
1284          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1285         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1286         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1287         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1288         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1289         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1290         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1291         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1292         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1293         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1294 };
1295
1296 /* Calculates a relative dB value from a ratio of linear
1297  *   (i.e. not dB) signal levels.
1298  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1299 int iwl3945_calc_db_from_ratio(int sig_ratio)
1300 {
1301         /* 1000:1 or higher just report as 60 dB */
1302         if (sig_ratio >= 1000)
1303                 return 60;
1304
1305         /* 100:1 or higher, divide by 10 and use table,
1306          *   add 20 dB to make up for divide by 10 */
1307         if (sig_ratio >= 100)
1308                 return 20 + (int)ratio2dB[sig_ratio/10];
1309
1310         /* We shouldn't see this */
1311         if (sig_ratio < 1)
1312                 return 0;
1313
1314         /* Use table for ratios 1:1 - 99:1 */
1315         return (int)ratio2dB[sig_ratio];
1316 }
1317
1318 #define PERFECT_RSSI (-20) /* dBm */
1319 #define WORST_RSSI (-95)   /* dBm */
1320 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1321
1322 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1323  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1324  *   about formulas used below. */
1325 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1326 {
1327         int sig_qual;
1328         int degradation = PERFECT_RSSI - rssi_dbm;
1329
1330         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1331          * as indicator; formula is (signal dbm - noise dbm).
1332          * SNR at or above 40 is a great signal (100%).
1333          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1334          * Weakest usable signal is usually 10 - 15 dB SNR. */
1335         if (noise_dbm) {
1336                 if (rssi_dbm - noise_dbm >= 40)
1337                         return 100;
1338                 else if (rssi_dbm < noise_dbm)
1339                         return 0;
1340                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1341
1342         /* Else use just the signal level.
1343          * This formula is a least squares fit of data points collected and
1344          *   compared with a reference system that had a percentage (%) display
1345          *   for signal quality. */
1346         } else
1347                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1348                             (15 * RSSI_RANGE + 62 * degradation)) /
1349                            (RSSI_RANGE * RSSI_RANGE);
1350
1351         if (sig_qual > 100)
1352                 sig_qual = 100;
1353         else if (sig_qual < 1)
1354                 sig_qual = 0;
1355
1356         return sig_qual;
1357 }
1358
1359 /**
1360  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1361  *
1362  * Uses the priv->rx_handlers callback function array to invoke
1363  * the appropriate handlers, including command responses,
1364  * frame-received notifications, and other notifications.
1365  */
1366 static void iwl3945_rx_handle(struct iwl_priv *priv)
1367 {
1368         struct iwl_rx_mem_buffer *rxb;
1369         struct iwl_rx_packet *pkt;
1370         struct iwl_rx_queue *rxq = &priv->rxq;
1371         u32 r, i;
1372         int reclaim;
1373         unsigned long flags;
1374         u8 fill_rx = 0;
1375         u32 count = 8;
1376         int total_empty = 0;
1377
1378         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1379          * buffer that the driver may process (last buffer filled by ucode). */
1380         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1381         i = rxq->read;
1382
1383         /* calculate total frames need to be restock after handling RX */
1384         total_empty = r - priv->rxq.write_actual;
1385         if (total_empty < 0)
1386                 total_empty += RX_QUEUE_SIZE;
1387
1388         if (total_empty > (RX_QUEUE_SIZE / 2))
1389                 fill_rx = 1;
1390         /* Rx interrupt, but nothing sent from uCode */
1391         if (i == r)
1392                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1393
1394         while (i != r) {
1395                 rxb = rxq->queue[i];
1396
1397                 /* If an RXB doesn't have a Rx queue slot associated with it,
1398                  * then a bug has been introduced in the queue refilling
1399                  * routines -- catch it here */
1400                 BUG_ON(rxb == NULL);
1401
1402                 rxq->queue[i] = NULL;
1403
1404                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1405                                 priv->hw_params.rx_buf_size,
1406                                 PCI_DMA_FROMDEVICE);
1407                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1408
1409                 /* Reclaim a command buffer only if this packet is a response
1410                  *   to a (driver-originated) command.
1411                  * If the packet (e.g. Rx frame) originated from uCode,
1412                  *   there is no command buffer to reclaim.
1413                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1414                  *   but apparently a few don't get set; catch them here. */
1415                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1416                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1417                         (pkt->hdr.cmd != REPLY_TX);
1418
1419                 /* Based on type of command response or notification,
1420                  *   handle those that need handling via function in
1421                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1422                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1423                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1424                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1425                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1426                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1427                 } else {
1428                         /* No handling needed */
1429                         IWL_DEBUG_RX(priv, "r %d i %d No handler needed for %s, 0x%02x\n",
1430                                 r, i, get_cmd_string(pkt->hdr.cmd),
1431                                 pkt->hdr.cmd);
1432                 }
1433
1434                 if (reclaim) {
1435                         /* Invoke any callbacks, transfer the skb to caller, and
1436                          * fire off the (possibly) blocking iwl_send_cmd()
1437                          * as we reclaim the driver command queue */
1438                         if (rxb && rxb->skb)
1439                                 iwl_tx_cmd_complete(priv, rxb);
1440                         else
1441                                 IWL_WARN(priv, "Claim null rxb?\n");
1442                 }
1443
1444                 /* For now we just don't re-use anything.  We can tweak this
1445                  * later to try and re-use notification packets and SKBs that
1446                  * fail to Rx correctly */
1447                 if (rxb->skb != NULL) {
1448                         priv->alloc_rxb_skb--;
1449                         dev_kfree_skb_any(rxb->skb);
1450                         rxb->skb = NULL;
1451                 }
1452
1453                 spin_lock_irqsave(&rxq->lock, flags);
1454                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1455                 spin_unlock_irqrestore(&rxq->lock, flags);
1456                 i = (i + 1) & RX_QUEUE_MASK;
1457                 /* If there are a lot of unused frames,
1458                  * restock the Rx queue so ucode won't assert. */
1459                 if (fill_rx) {
1460                         count++;
1461                         if (count >= 8) {
1462                                 priv->rxq.read = i;
1463                                 iwl3945_rx_replenish_now(priv);
1464                                 count = 0;
1465                         }
1466                 }
1467         }
1468
1469         /* Backtrack one entry */
1470         priv->rxq.read = i;
1471         if (fill_rx)
1472                 iwl3945_rx_replenish_now(priv);
1473         else
1474                 iwl3945_rx_queue_restock(priv);
1475 }
1476
1477 /* call this function to flush any scheduled tasklet */
1478 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1479 {
1480         /* wait to make sure we flush pending tasklet*/
1481         synchronize_irq(priv->pci_dev->irq);
1482         tasklet_kill(&priv->irq_tasklet);
1483 }
1484
1485 #ifdef CONFIG_IWLWIFI_DEBUG
1486 static const char *desc_lookup(int i)
1487 {
1488         switch (i) {
1489         case 1:
1490                 return "FAIL";
1491         case 2:
1492                 return "BAD_PARAM";
1493         case 3:
1494                 return "BAD_CHECKSUM";
1495         case 4:
1496                 return "NMI_INTERRUPT";
1497         case 5:
1498                 return "SYSASSERT";
1499         case 6:
1500                 return "FATAL_ERROR";
1501         }
1502
1503         return "UNKNOWN";
1504 }
1505
1506 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1507 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1508
1509 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1510 {
1511         u32 i;
1512         u32 desc, time, count, base, data1;
1513         u32 blink1, blink2, ilink1, ilink2;
1514
1515         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1516
1517         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1518                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1519                 return;
1520         }
1521
1522
1523         count = iwl_read_targ_mem(priv, base);
1524
1525         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1526                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1527                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1528                         priv->status, count);
1529         }
1530
1531         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1532                   "ilink1  nmiPC   Line\n");
1533         for (i = ERROR_START_OFFSET;
1534              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1535              i += ERROR_ELEM_SIZE) {
1536                 desc = iwl_read_targ_mem(priv, base + i);
1537                 time =
1538                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1539                 blink1 =
1540                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1541                 blink2 =
1542                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1543                 ilink1 =
1544                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1545                 ilink2 =
1546                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1547                 data1 =
1548                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1549
1550                 IWL_ERR(priv,
1551                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1552                         desc_lookup(desc), desc, time, blink1, blink2,
1553                         ilink1, ilink2, data1);
1554         }
1555
1556 }
1557
1558 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1559
1560 /**
1561  * iwl3945_print_event_log - Dump error event log to syslog
1562  *
1563  */
1564 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1565                                 u32 num_events, u32 mode)
1566 {
1567         u32 i;
1568         u32 base;       /* SRAM byte address of event log header */
1569         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1570         u32 ptr;        /* SRAM byte address of log data */
1571         u32 ev, time, data; /* event log data */
1572
1573         if (num_events == 0)
1574                 return;
1575
1576         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1577
1578         if (mode == 0)
1579                 event_size = 2 * sizeof(u32);
1580         else
1581                 event_size = 3 * sizeof(u32);
1582
1583         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1584
1585         /* "time" is actually "data" for mode 0 (no timestamp).
1586          * place event id # at far right for easier visual parsing. */
1587         for (i = 0; i < num_events; i++) {
1588                 ev = iwl_read_targ_mem(priv, ptr);
1589                 ptr += sizeof(u32);
1590                 time = iwl_read_targ_mem(priv, ptr);
1591                 ptr += sizeof(u32);
1592                 if (mode == 0) {
1593                         /* data, ev */
1594                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1595                 } else {
1596                         data = iwl_read_targ_mem(priv, ptr);
1597                         ptr += sizeof(u32);
1598                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1599                 }
1600         }
1601 }
1602
1603 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1604 {
1605         u32 base;       /* SRAM byte address of event log header */
1606         u32 capacity;   /* event log capacity in # entries */
1607         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1608         u32 num_wraps;  /* # times uCode wrapped to top of log */
1609         u32 next_entry; /* index of next entry to be written by uCode */
1610         u32 size;       /* # entries that we'll print */
1611
1612         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1613         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1614                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1615                 return;
1616         }
1617
1618         /* event log header */
1619         capacity = iwl_read_targ_mem(priv, base);
1620         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1621         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1622         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1623
1624         size = num_wraps ? capacity : next_entry;
1625
1626         /* bail out if nothing in log */
1627         if (size == 0) {
1628                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1629                 return;
1630         }
1631
1632         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1633                   size, num_wraps);
1634
1635         /* if uCode has wrapped back to top of log, start at the oldest entry,
1636          * i.e the next one that uCode would fill. */
1637         if (num_wraps)
1638                 iwl3945_print_event_log(priv, next_entry,
1639                                     capacity - next_entry, mode);
1640
1641         /* (then/else) start at top of log */
1642         iwl3945_print_event_log(priv, 0, next_entry, mode);
1643
1644 }
1645 #else
1646 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1647 {
1648 }
1649
1650 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1651 {
1652 }
1653
1654 #endif
1655
1656 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1657 {
1658         u32 inta, handled = 0;
1659         u32 inta_fh;
1660         unsigned long flags;
1661 #ifdef CONFIG_IWLWIFI_DEBUG
1662         u32 inta_mask;
1663 #endif
1664
1665         spin_lock_irqsave(&priv->lock, flags);
1666
1667         /* Ack/clear/reset pending uCode interrupts.
1668          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1669          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1670         inta = iwl_read32(priv, CSR_INT);
1671         iwl_write32(priv, CSR_INT, inta);
1672
1673         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1674          * Any new interrupts that happen after this, either while we're
1675          * in this tasklet, or later, will show up in next ISR/tasklet. */
1676         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1677         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1678
1679 #ifdef CONFIG_IWLWIFI_DEBUG
1680         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1681                 /* just for debug */
1682                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1683                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1684                               inta, inta_mask, inta_fh);
1685         }
1686 #endif
1687
1688         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1689          * atomic, make sure that inta covers all the interrupts that
1690          * we've discovered, even if FH interrupt came in just after
1691          * reading CSR_INT. */
1692         if (inta_fh & CSR39_FH_INT_RX_MASK)
1693                 inta |= CSR_INT_BIT_FH_RX;
1694         if (inta_fh & CSR39_FH_INT_TX_MASK)
1695                 inta |= CSR_INT_BIT_FH_TX;
1696
1697         /* Now service all interrupt bits discovered above. */
1698         if (inta & CSR_INT_BIT_HW_ERR) {
1699                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1700
1701                 /* Tell the device to stop sending interrupts */
1702                 iwl_disable_interrupts(priv);
1703
1704                 priv->isr_stats.hw++;
1705                 iwl_irq_handle_error(priv);
1706
1707                 handled |= CSR_INT_BIT_HW_ERR;
1708
1709                 spin_unlock_irqrestore(&priv->lock, flags);
1710
1711                 return;
1712         }
1713
1714 #ifdef CONFIG_IWLWIFI_DEBUG
1715         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1716                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1717                 if (inta & CSR_INT_BIT_SCD) {
1718                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1719                                       "the frame/frames.\n");
1720                         priv->isr_stats.sch++;
1721                 }
1722
1723                 /* Alive notification via Rx interrupt will do the real work */
1724                 if (inta & CSR_INT_BIT_ALIVE) {
1725                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1726                         priv->isr_stats.alive++;
1727                 }
1728         }
1729 #endif
1730         /* Safely ignore these bits for debug checks below */
1731         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1732
1733         /* Error detected by uCode */
1734         if (inta & CSR_INT_BIT_SW_ERR) {
1735                 IWL_ERR(priv, "Microcode SW error detected. "
1736                         "Restarting 0x%X.\n", inta);
1737                 priv->isr_stats.sw++;
1738                 priv->isr_stats.sw_err = inta;
1739                 iwl_irq_handle_error(priv);
1740                 handled |= CSR_INT_BIT_SW_ERR;
1741         }
1742
1743         /* uCode wakes up after power-down sleep */
1744         if (inta & CSR_INT_BIT_WAKEUP) {
1745                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1746                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1747                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1748                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1749                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1750                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1751                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1752                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1753
1754                 priv->isr_stats.wakeup++;
1755                 handled |= CSR_INT_BIT_WAKEUP;
1756         }
1757
1758         /* All uCode command responses, including Tx command responses,
1759          * Rx "responses" (frame-received notification), and other
1760          * notifications from uCode come through here*/
1761         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1762                 iwl3945_rx_handle(priv);
1763                 priv->isr_stats.rx++;
1764                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1765         }
1766
1767         if (inta & CSR_INT_BIT_FH_TX) {
1768                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1769                 priv->isr_stats.tx++;
1770
1771                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1772                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1773                                         (FH39_SRVC_CHNL), 0x0);
1774                 handled |= CSR_INT_BIT_FH_TX;
1775         }
1776
1777         if (inta & ~handled) {
1778                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1779                 priv->isr_stats.unhandled++;
1780         }
1781
1782         if (inta & ~priv->inta_mask) {
1783                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1784                          inta & ~priv->inta_mask);
1785                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1786         }
1787
1788         /* Re-enable all interrupts */
1789         /* only Re-enable if disabled by irq */
1790         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1791                 iwl_enable_interrupts(priv);
1792
1793 #ifdef CONFIG_IWLWIFI_DEBUG
1794         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1795                 inta = iwl_read32(priv, CSR_INT);
1796                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1797                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1798                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1799                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1800         }
1801 #endif
1802         spin_unlock_irqrestore(&priv->lock, flags);
1803 }
1804
1805 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1806                                          enum ieee80211_band band,
1807                                      u8 is_active, u8 n_probes,
1808                                      struct iwl3945_scan_channel *scan_ch)
1809 {
1810         struct ieee80211_channel *chan;
1811         const struct ieee80211_supported_band *sband;
1812         const struct iwl_channel_info *ch_info;
1813         u16 passive_dwell = 0;
1814         u16 active_dwell = 0;
1815         int added, i;
1816
1817         sband = iwl_get_hw_mode(priv, band);
1818         if (!sband)
1819                 return 0;
1820
1821         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1822         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1823
1824         if (passive_dwell <= active_dwell)
1825                 passive_dwell = active_dwell + 1;
1826
1827         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1828                 chan = priv->scan_request->channels[i];
1829
1830                 if (chan->band != band)
1831                         continue;
1832
1833                 scan_ch->channel = chan->hw_value;
1834
1835                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1836                 if (!is_channel_valid(ch_info)) {
1837                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1838                                        scan_ch->channel);
1839                         continue;
1840                 }
1841
1842                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1843                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1844                 /* If passive , set up for auto-switch
1845                  *  and use long active_dwell time.
1846                  */
1847                 if (!is_active || is_channel_passive(ch_info) ||
1848                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1849                         scan_ch->type = 0;      /* passive */
1850                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1851                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1852                 } else {
1853                         scan_ch->type = 1;      /* active */
1854                 }
1855
1856                 /* Set direct probe bits. These may be used both for active
1857                  * scan channels (probes gets sent right away),
1858                  * or for passive channels (probes get se sent only after
1859                  * hearing clear Rx packet).*/
1860                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1861                         if (n_probes)
1862                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1863                 } else {
1864                         /* uCode v1 does not allow setting direct probe bits on
1865                          * passive channel. */
1866                         if ((scan_ch->type & 1) && n_probes)
1867                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1868                 }
1869
1870                 /* Set txpower levels to defaults */
1871                 scan_ch->tpc.dsp_atten = 110;
1872                 /* scan_pwr_info->tpc.dsp_atten; */
1873
1874                 /*scan_pwr_info->tpc.tx_gain; */
1875                 if (band == IEEE80211_BAND_5GHZ)
1876                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1877                 else {
1878                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1879                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1880                          * power level:
1881                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1882                          */
1883                 }
1884
1885                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1886                                scan_ch->channel,
1887                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1888                                (scan_ch->type & 1) ?
1889                                active_dwell : passive_dwell);
1890
1891                 scan_ch++;
1892                 added++;
1893         }
1894
1895         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1896         return added;
1897 }
1898
1899 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1900                               struct ieee80211_rate *rates)
1901 {
1902         int i;
1903
1904         for (i = 0; i < IWL_RATE_COUNT; i++) {
1905                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1906                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1907                 rates[i].hw_value_short = i;
1908                 rates[i].flags = 0;
1909                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1910                         /*
1911                          * If CCK != 1M then set short preamble rate flag.
1912                          */
1913                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1914                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1915                 }
1916         }
1917 }
1918
1919 /******************************************************************************
1920  *
1921  * uCode download functions
1922  *
1923  ******************************************************************************/
1924
1925 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1926 {
1927         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1928         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1929         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1930         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1931         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1932         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1933 }
1934
1935 /**
1936  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1937  *     looking at all data.
1938  */
1939 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1940 {
1941         u32 val;
1942         u32 save_len = len;
1943         int rc = 0;
1944         u32 errcnt;
1945
1946         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1947
1948         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1949                                IWL39_RTC_INST_LOWER_BOUND);
1950
1951         errcnt = 0;
1952         for (; len > 0; len -= sizeof(u32), image++) {
1953                 /* read data comes through single port, auto-incr addr */
1954                 /* NOTE: Use the debugless read so we don't flood kernel log
1955                  * if IWL_DL_IO is set */
1956                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1957                 if (val != le32_to_cpu(*image)) {
1958                         IWL_ERR(priv, "uCode INST section is invalid at "
1959                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1960                                   save_len - len, val, le32_to_cpu(*image));
1961                         rc = -EIO;
1962                         errcnt++;
1963                         if (errcnt >= 20)
1964                                 break;
1965                 }
1966         }
1967
1968
1969         if (!errcnt)
1970                 IWL_DEBUG_INFO(priv,
1971                         "ucode image in INSTRUCTION memory is good\n");
1972
1973         return rc;
1974 }
1975
1976
1977 /**
1978  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1979  *   using sample data 100 bytes apart.  If these sample points are good,
1980  *   it's a pretty good bet that everything between them is good, too.
1981  */
1982 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1983 {
1984         u32 val;
1985         int rc = 0;
1986         u32 errcnt = 0;
1987         u32 i;
1988
1989         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1990
1991         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1992                 /* read data comes through single port, auto-incr addr */
1993                 /* NOTE: Use the debugless read so we don't flood kernel log
1994                  * if IWL_DL_IO is set */
1995                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1996                         i + IWL39_RTC_INST_LOWER_BOUND);
1997                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1998                 if (val != le32_to_cpu(*image)) {
1999 #if 0 /* Enable this if you want to see details */
2000                         IWL_ERR(priv, "uCode INST section is invalid at "
2001                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2002                                   i, val, *image);
2003 #endif
2004                         rc = -EIO;
2005                         errcnt++;
2006                         if (errcnt >= 3)
2007                                 break;
2008                 }
2009         }
2010
2011         return rc;
2012 }
2013
2014
2015 /**
2016  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2017  *    and verify its contents
2018  */
2019 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2020 {
2021         __le32 *image;
2022         u32 len;
2023         int rc = 0;
2024
2025         /* Try bootstrap */
2026         image = (__le32 *)priv->ucode_boot.v_addr;
2027         len = priv->ucode_boot.len;
2028         rc = iwl3945_verify_inst_sparse(priv, image, len);
2029         if (rc == 0) {
2030                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2031                 return 0;
2032         }
2033
2034         /* Try initialize */
2035         image = (__le32 *)priv->ucode_init.v_addr;
2036         len = priv->ucode_init.len;
2037         rc = iwl3945_verify_inst_sparse(priv, image, len);
2038         if (rc == 0) {
2039                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2040                 return 0;
2041         }
2042
2043         /* Try runtime/protocol */
2044         image = (__le32 *)priv->ucode_code.v_addr;
2045         len = priv->ucode_code.len;
2046         rc = iwl3945_verify_inst_sparse(priv, image, len);
2047         if (rc == 0) {
2048                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2049                 return 0;
2050         }
2051
2052         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2053
2054         /* Since nothing seems to match, show first several data entries in
2055          * instruction SRAM, so maybe visual inspection will give a clue.
2056          * Selection of bootstrap image (vs. other images) is arbitrary. */
2057         image = (__le32 *)priv->ucode_boot.v_addr;
2058         len = priv->ucode_boot.len;
2059         rc = iwl3945_verify_inst_full(priv, image, len);
2060
2061         return rc;
2062 }
2063
2064 static void iwl3945_nic_start(struct iwl_priv *priv)
2065 {
2066         /* Remove all resets to allow NIC to operate */
2067         iwl_write32(priv, CSR_RESET, 0);
2068 }
2069
2070 /**
2071  * iwl3945_read_ucode - Read uCode images from disk file.
2072  *
2073  * Copy into buffers for card to fetch via bus-mastering
2074  */
2075 static int iwl3945_read_ucode(struct iwl_priv *priv)
2076 {
2077         const struct iwl_ucode_header *ucode;
2078         int ret = -EINVAL, index;
2079         const struct firmware *ucode_raw;
2080         /* firmware file name contains uCode/driver compatibility version */
2081         const char *name_pre = priv->cfg->fw_name_pre;
2082         const unsigned int api_max = priv->cfg->ucode_api_max;
2083         const unsigned int api_min = priv->cfg->ucode_api_min;
2084         char buf[25];
2085         u8 *src;
2086         size_t len;
2087         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2088
2089         /* Ask kernel firmware_class module to get the boot firmware off disk.
2090          * request_firmware() is synchronous, file is in memory on return. */
2091         for (index = api_max; index >= api_min; index--) {
2092                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2093                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2094                 if (ret < 0) {
2095                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2096                                   buf, ret);
2097                         if (ret == -ENOENT)
2098                                 continue;
2099                         else
2100                                 goto error;
2101                 } else {
2102                         if (index < api_max)
2103                                 IWL_ERR(priv, "Loaded firmware %s, "
2104                                         "which is deprecated. "
2105                                         " Please use API v%u instead.\n",
2106                                           buf, api_max);
2107                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2108                                        "(%zd bytes) from disk\n",
2109                                        buf, ucode_raw->size);
2110                         break;
2111                 }
2112         }
2113
2114         if (ret < 0)
2115                 goto error;
2116
2117         /* Make sure that we got at least our header! */
2118         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2119                 IWL_ERR(priv, "File size way too small!\n");
2120                 ret = -EINVAL;
2121                 goto err_release;
2122         }
2123
2124         /* Data from ucode file:  header followed by uCode images */
2125         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2126
2127         priv->ucode_ver = le32_to_cpu(ucode->ver);
2128         api_ver = IWL_UCODE_API(priv->ucode_ver);
2129         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2130         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2131         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2132         init_data_size =
2133                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2134         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2135         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2136
2137         /* api_ver should match the api version forming part of the
2138          * firmware filename ... but we don't check for that and only rely
2139          * on the API version read from firmware header from here on forward */
2140
2141         if (api_ver < api_min || api_ver > api_max) {
2142                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2143                           "Driver supports v%u, firmware is v%u.\n",
2144                           api_max, api_ver);
2145                 priv->ucode_ver = 0;
2146                 ret = -EINVAL;
2147                 goto err_release;
2148         }
2149         if (api_ver != api_max)
2150                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2151                           "got %u. New firmware can be obtained "
2152                           "from http://www.intellinuxwireless.org.\n",
2153                           api_max, api_ver);
2154
2155         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2156                 IWL_UCODE_MAJOR(priv->ucode_ver),
2157                 IWL_UCODE_MINOR(priv->ucode_ver),
2158                 IWL_UCODE_API(priv->ucode_ver),
2159                 IWL_UCODE_SERIAL(priv->ucode_ver));
2160
2161         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2162                        priv->ucode_ver);
2163         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2164                        inst_size);
2165         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2166                        data_size);
2167         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2168                        init_size);
2169         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2170                        init_data_size);
2171         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2172                        boot_size);
2173
2174
2175         /* Verify size of file vs. image size info in file's header */
2176         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2177                 inst_size + data_size + init_size +
2178                 init_data_size + boot_size) {
2179
2180                 IWL_DEBUG_INFO(priv,
2181                         "uCode file size %zd does not match expected size\n",
2182                         ucode_raw->size);
2183                 ret = -EINVAL;
2184                 goto err_release;
2185         }
2186
2187         /* Verify that uCode images will fit in card's SRAM */
2188         if (inst_size > IWL39_MAX_INST_SIZE) {
2189                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2190                                inst_size);
2191                 ret = -EINVAL;
2192                 goto err_release;
2193         }
2194
2195         if (data_size > IWL39_MAX_DATA_SIZE) {
2196                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2197                                data_size);
2198                 ret = -EINVAL;
2199                 goto err_release;
2200         }
2201         if (init_size > IWL39_MAX_INST_SIZE) {
2202                 IWL_DEBUG_INFO(priv,
2203                                 "uCode init instr len %d too large to fit in\n",
2204                                 init_size);
2205                 ret = -EINVAL;
2206                 goto err_release;
2207         }
2208         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2209                 IWL_DEBUG_INFO(priv,
2210                                 "uCode init data len %d too large to fit in\n",
2211                                 init_data_size);
2212                 ret = -EINVAL;
2213                 goto err_release;
2214         }
2215         if (boot_size > IWL39_MAX_BSM_SIZE) {
2216                 IWL_DEBUG_INFO(priv,
2217                                 "uCode boot instr len %d too large to fit in\n",
2218                                 boot_size);
2219                 ret = -EINVAL;
2220                 goto err_release;
2221         }
2222
2223         /* Allocate ucode buffers for card's bus-master loading ... */
2224
2225         /* Runtime instructions and 2 copies of data:
2226          * 1) unmodified from disk
2227          * 2) backup cache for save/restore during power-downs */
2228         priv->ucode_code.len = inst_size;
2229         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2230
2231         priv->ucode_data.len = data_size;
2232         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2233
2234         priv->ucode_data_backup.len = data_size;
2235         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2236
2237         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2238             !priv->ucode_data_backup.v_addr)
2239                 goto err_pci_alloc;
2240
2241         /* Initialization instructions and data */
2242         if (init_size && init_data_size) {
2243                 priv->ucode_init.len = init_size;
2244                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2245
2246                 priv->ucode_init_data.len = init_data_size;
2247                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2248
2249                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2250                         goto err_pci_alloc;
2251         }
2252
2253         /* Bootstrap (instructions only, no data) */
2254         if (boot_size) {
2255                 priv->ucode_boot.len = boot_size;
2256                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2257
2258                 if (!priv->ucode_boot.v_addr)
2259                         goto err_pci_alloc;
2260         }
2261
2262         /* Copy images into buffers for card's bus-master reads ... */
2263
2264         /* Runtime instructions (first block of data in file) */
2265         len = inst_size;
2266         IWL_DEBUG_INFO(priv,
2267                 "Copying (but not loading) uCode instr len %zd\n", len);
2268         memcpy(priv->ucode_code.v_addr, src, len);
2269         src += len;
2270
2271         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2272                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2273
2274         /* Runtime data (2nd block)
2275          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2276         len = data_size;
2277         IWL_DEBUG_INFO(priv,
2278                 "Copying (but not loading) uCode data len %zd\n", len);
2279         memcpy(priv->ucode_data.v_addr, src, len);
2280         memcpy(priv->ucode_data_backup.v_addr, src, len);
2281         src += len;
2282
2283         /* Initialization instructions (3rd block) */
2284         if (init_size) {
2285                 len = init_size;
2286                 IWL_DEBUG_INFO(priv,
2287                         "Copying (but not loading) init instr len %zd\n", len);
2288                 memcpy(priv->ucode_init.v_addr, src, len);
2289                 src += len;
2290         }
2291
2292         /* Initialization data (4th block) */
2293         if (init_data_size) {
2294                 len = init_data_size;
2295                 IWL_DEBUG_INFO(priv,
2296                         "Copying (but not loading) init data len %zd\n", len);
2297                 memcpy(priv->ucode_init_data.v_addr, src, len);
2298                 src += len;
2299         }
2300
2301         /* Bootstrap instructions (5th block) */
2302         len = boot_size;
2303         IWL_DEBUG_INFO(priv,
2304                 "Copying (but not loading) boot instr len %zd\n", len);
2305         memcpy(priv->ucode_boot.v_addr, src, len);
2306
2307         /* We have our copies now, allow OS release its copies */
2308         release_firmware(ucode_raw);
2309         return 0;
2310
2311  err_pci_alloc:
2312         IWL_ERR(priv, "failed to allocate pci memory\n");
2313         ret = -ENOMEM;
2314         iwl3945_dealloc_ucode_pci(priv);
2315
2316  err_release:
2317         release_firmware(ucode_raw);
2318
2319  error:
2320         return ret;
2321 }
2322
2323
2324 /**
2325  * iwl3945_set_ucode_ptrs - Set uCode address location
2326  *
2327  * Tell initialization uCode where to find runtime uCode.
2328  *
2329  * BSM registers initially contain pointers to initialization uCode.
2330  * We need to replace them to load runtime uCode inst and data,
2331  * and to save runtime data when powering down.
2332  */
2333 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2334 {
2335         dma_addr_t pinst;
2336         dma_addr_t pdata;
2337
2338         /* bits 31:0 for 3945 */
2339         pinst = priv->ucode_code.p_addr;
2340         pdata = priv->ucode_data_backup.p_addr;
2341
2342         /* Tell bootstrap uCode where to find image to load */
2343         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2344         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2345         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2346                                  priv->ucode_data.len);
2347
2348         /* Inst byte count must be last to set up, bit 31 signals uCode
2349          *   that all new ptr/size info is in place */
2350         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2351                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2352
2353         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2354
2355         return 0;
2356 }
2357
2358 /**
2359  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2360  *
2361  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2362  *
2363  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2364  */
2365 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2366 {
2367         /* Check alive response for "valid" sign from uCode */
2368         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2369                 /* We had an error bringing up the hardware, so take it
2370                  * all the way back down so we can try again */
2371                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2372                 goto restart;
2373         }
2374
2375         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2376          * This is a paranoid check, because we would not have gotten the
2377          * "initialize" alive if code weren't properly loaded.  */
2378         if (iwl3945_verify_ucode(priv)) {
2379                 /* Runtime instruction load was bad;
2380                  * take it all the way back down so we can try again */
2381                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2382                 goto restart;
2383         }
2384
2385         /* Send pointers to protocol/runtime uCode image ... init code will
2386          * load and launch runtime uCode, which will send us another "Alive"
2387          * notification. */
2388         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2389         if (iwl3945_set_ucode_ptrs(priv)) {
2390                 /* Runtime instruction load won't happen;
2391                  * take it all the way back down so we can try again */
2392                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2393                 goto restart;
2394         }
2395         return;
2396
2397  restart:
2398         queue_work(priv->workqueue, &priv->restart);
2399 }
2400
2401 /**
2402  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2403  *                   from protocol/runtime uCode (initialization uCode's
2404  *                   Alive gets handled by iwl3945_init_alive_start()).
2405  */
2406 static void iwl3945_alive_start(struct iwl_priv *priv)
2407 {
2408         int thermal_spin = 0;
2409         u32 rfkill;
2410
2411         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2412
2413         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2414                 /* We had an error bringing up the hardware, so take it
2415                  * all the way back down so we can try again */
2416                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2417                 goto restart;
2418         }
2419
2420         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2421          * This is a paranoid check, because we would not have gotten the
2422          * "runtime" alive if code weren't properly loaded.  */
2423         if (iwl3945_verify_ucode(priv)) {
2424                 /* Runtime instruction load was bad;
2425                  * take it all the way back down so we can try again */
2426                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2427                 goto restart;
2428         }
2429
2430         iwl_clear_stations_table(priv);
2431
2432         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2433         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2434
2435         if (rfkill & 0x1) {
2436                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2437                 /* if RFKILL is not on, then wait for thermal
2438                  * sensor in adapter to kick in */
2439                 while (iwl3945_hw_get_temperature(priv) == 0) {
2440                         thermal_spin++;
2441                         udelay(10);
2442                 }
2443
2444                 if (thermal_spin)
2445                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2446                                        thermal_spin * 10);
2447         } else
2448                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2449
2450         /* After the ALIVE response, we can send commands to 3945 uCode */
2451         set_bit(STATUS_ALIVE, &priv->status);
2452
2453         if (iwl_is_rfkill(priv))
2454                 return;
2455
2456         ieee80211_wake_queues(priv->hw);
2457
2458         priv->active_rate = priv->rates_mask;
2459         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2460
2461         iwl_power_update_mode(priv, false);
2462
2463         if (iwl_is_associated(priv)) {
2464                 struct iwl3945_rxon_cmd *active_rxon =
2465                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2466
2467                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2468                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2469         } else {
2470                 /* Initialize our rx_config data */
2471                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2472         }
2473
2474         /* Configure Bluetooth device coexistence support */
2475         iwl_send_bt_config(priv);
2476
2477         /* Configure the adapter for unassociated operation */
2478         iwlcore_commit_rxon(priv);
2479
2480         iwl3945_reg_txpower_periodic(priv);
2481
2482         iwl3945_led_register(priv);
2483
2484         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2485         set_bit(STATUS_READY, &priv->status);
2486         wake_up_interruptible(&priv->wait_command_queue);
2487
2488         /* reassociate for ADHOC mode */
2489         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2490                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2491                                                                 priv->vif);
2492                 if (beacon)
2493                         iwl_mac_beacon_update(priv->hw, beacon);
2494         }
2495
2496         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2497                 iwl_set_mode(priv, priv->iw_mode);
2498
2499         return;
2500
2501  restart:
2502         queue_work(priv->workqueue, &priv->restart);
2503 }
2504
2505 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2506
2507 static void __iwl3945_down(struct iwl_priv *priv)
2508 {
2509         unsigned long flags;
2510         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2511         struct ieee80211_conf *conf = NULL;
2512
2513         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2514
2515         conf = ieee80211_get_hw_conf(priv->hw);
2516
2517         if (!exit_pending)
2518                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2519
2520         iwl3945_led_unregister(priv);
2521         iwl_clear_stations_table(priv);
2522
2523         /* Unblock any waiting calls */
2524         wake_up_interruptible_all(&priv->wait_command_queue);
2525
2526         /* Wipe out the EXIT_PENDING status bit if we are not actually
2527          * exiting the module */
2528         if (!exit_pending)
2529                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2530
2531         /* stop and reset the on-board processor */
2532         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2533
2534         /* tell the device to stop sending interrupts */
2535         spin_lock_irqsave(&priv->lock, flags);
2536         iwl_disable_interrupts(priv);
2537         spin_unlock_irqrestore(&priv->lock, flags);
2538         iwl_synchronize_irq(priv);
2539
2540         if (priv->mac80211_registered)
2541                 ieee80211_stop_queues(priv->hw);
2542
2543         /* If we have not previously called iwl3945_init() then
2544          * clear all bits but the RF Kill bits and return */
2545         if (!iwl_is_init(priv)) {
2546                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2547                                         STATUS_RF_KILL_HW |
2548                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2549                                         STATUS_GEO_CONFIGURED |
2550                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2551                                         STATUS_EXIT_PENDING;
2552                 goto exit;
2553         }
2554
2555         /* ...otherwise clear out all the status bits but the RF Kill
2556          * bit and continue taking the NIC down. */
2557         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2558                                 STATUS_RF_KILL_HW |
2559                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2560                                 STATUS_GEO_CONFIGURED |
2561                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2562                                 STATUS_FW_ERROR |
2563                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2564                                 STATUS_EXIT_PENDING;
2565
2566         priv->cfg->ops->lib->apm_ops.reset(priv);
2567         spin_lock_irqsave(&priv->lock, flags);
2568         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2569         spin_unlock_irqrestore(&priv->lock, flags);
2570
2571         iwl3945_hw_txq_ctx_stop(priv);
2572         iwl3945_hw_rxq_stop(priv);
2573
2574         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2575                                 APMG_CLK_VAL_DMA_CLK_RQT);
2576
2577         udelay(5);
2578
2579         if (exit_pending)
2580                 priv->cfg->ops->lib->apm_ops.stop(priv);
2581         else
2582                 priv->cfg->ops->lib->apm_ops.reset(priv);
2583
2584  exit:
2585         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2586
2587         if (priv->ibss_beacon)
2588                 dev_kfree_skb(priv->ibss_beacon);
2589         priv->ibss_beacon = NULL;
2590
2591         /* clear out any free frames */
2592         iwl3945_clear_free_frames(priv);
2593 }
2594
2595 static void iwl3945_down(struct iwl_priv *priv)
2596 {
2597         mutex_lock(&priv->mutex);
2598         __iwl3945_down(priv);
2599         mutex_unlock(&priv->mutex);
2600
2601         iwl3945_cancel_deferred_work(priv);
2602 }
2603
2604 #define MAX_HW_RESTARTS 5
2605
2606 static int __iwl3945_up(struct iwl_priv *priv)
2607 {
2608         int rc, i;
2609
2610         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2611                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2612                 return -EIO;
2613         }
2614
2615         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2616                 IWL_ERR(priv, "ucode not available for device bring up\n");
2617                 return -EIO;
2618         }
2619
2620         /* If platform's RF_KILL switch is NOT set to KILL */
2621         if (iwl_read32(priv, CSR_GP_CNTRL) &
2622                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2623                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2624         else {
2625                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2626                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2627                 return -ENODEV;
2628         }
2629
2630         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2631
2632         rc = iwl3945_hw_nic_init(priv);
2633         if (rc) {
2634                 IWL_ERR(priv, "Unable to int nic\n");
2635                 return rc;
2636         }
2637
2638         /* make sure rfkill handshake bits are cleared */
2639         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2640         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2641                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2642
2643         /* clear (again), then enable host interrupts */
2644         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2645         iwl_enable_interrupts(priv);
2646
2647         /* really make sure rfkill handshake bits are cleared */
2648         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2649         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2650
2651         /* Copy original ucode data image from disk into backup cache.
2652          * This will be used to initialize the on-board processor's
2653          * data SRAM for a clean start when the runtime program first loads. */
2654         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2655                priv->ucode_data.len);
2656
2657         /* We return success when we resume from suspend and rf_kill is on. */
2658         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2659                 return 0;
2660
2661         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2662
2663                 iwl_clear_stations_table(priv);
2664
2665                 /* load bootstrap state machine,
2666                  * load bootstrap program into processor's memory,
2667                  * prepare to load the "initialize" uCode */
2668                 priv->cfg->ops->lib->load_ucode(priv);
2669
2670                 if (rc) {
2671                         IWL_ERR(priv,
2672                                 "Unable to set up bootstrap uCode: %d\n", rc);
2673                         continue;
2674                 }
2675
2676                 /* start card; "initialize" will load runtime ucode */
2677                 iwl3945_nic_start(priv);
2678
2679                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2680
2681                 return 0;
2682         }
2683
2684         set_bit(STATUS_EXIT_PENDING, &priv->status);
2685         __iwl3945_down(priv);
2686         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2687
2688         /* tried to restart and config the device for as long as our
2689          * patience could withstand */
2690         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2691         return -EIO;
2692 }
2693
2694
2695 /*****************************************************************************
2696  *
2697  * Workqueue callbacks
2698  *
2699  *****************************************************************************/
2700
2701 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2702 {
2703         struct iwl_priv *priv =
2704             container_of(data, struct iwl_priv, init_alive_start.work);
2705
2706         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2707                 return;
2708
2709         mutex_lock(&priv->mutex);
2710         iwl3945_init_alive_start(priv);
2711         mutex_unlock(&priv->mutex);
2712 }
2713
2714 static void iwl3945_bg_alive_start(struct work_struct *data)
2715 {
2716         struct iwl_priv *priv =
2717             container_of(data, struct iwl_priv, alive_start.work);
2718
2719         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2720                 return;
2721
2722         mutex_lock(&priv->mutex);
2723         iwl3945_alive_start(priv);
2724         mutex_unlock(&priv->mutex);
2725 }
2726
2727 static void iwl3945_rfkill_poll(struct work_struct *data)
2728 {
2729         struct iwl_priv *priv =
2730             container_of(data, struct iwl_priv, rfkill_poll.work);
2731
2732         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2733                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2734         else
2735                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2736
2737         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2738                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2739
2740         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2741                            round_jiffies_relative(2 * HZ));
2742
2743 }
2744
2745 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2746 static void iwl3945_bg_request_scan(struct work_struct *data)
2747 {
2748         struct iwl_priv *priv =
2749             container_of(data, struct iwl_priv, request_scan);
2750         struct iwl_host_cmd cmd = {
2751                 .id = REPLY_SCAN_CMD,
2752                 .len = sizeof(struct iwl3945_scan_cmd),
2753                 .flags = CMD_SIZE_HUGE,
2754         };
2755         int rc = 0;
2756         struct iwl3945_scan_cmd *scan;
2757         struct ieee80211_conf *conf = NULL;
2758         u8 n_probes = 0;
2759         enum ieee80211_band band;
2760         bool is_active = false;
2761
2762         conf = ieee80211_get_hw_conf(priv->hw);
2763
2764         mutex_lock(&priv->mutex);
2765
2766         cancel_delayed_work(&priv->scan_check);
2767
2768         if (!iwl_is_ready(priv)) {
2769                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2770                 goto done;
2771         }
2772
2773         /* Make sure the scan wasn't canceled before this queued work
2774          * was given the chance to run... */
2775         if (!test_bit(STATUS_SCANNING, &priv->status))
2776                 goto done;
2777
2778         /* This should never be called or scheduled if there is currently
2779          * a scan active in the hardware. */
2780         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2781                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2782                                 "Ignoring second request.\n");
2783                 rc = -EIO;
2784                 goto done;
2785         }
2786
2787         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2788                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2789                 goto done;
2790         }
2791
2792         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2793                 IWL_DEBUG_HC(priv,
2794                         "Scan request while abort pending. Queuing.\n");
2795                 goto done;
2796         }
2797
2798         if (iwl_is_rfkill(priv)) {
2799                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2800                 goto done;
2801         }
2802
2803         if (!test_bit(STATUS_READY, &priv->status)) {
2804                 IWL_DEBUG_HC(priv,
2805                         "Scan request while uninitialized. Queuing.\n");
2806                 goto done;
2807         }
2808
2809         if (!priv->scan_bands) {
2810                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2811                 goto done;
2812         }
2813
2814         if (!priv->scan) {
2815                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2816                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2817                 if (!priv->scan) {
2818                         rc = -ENOMEM;
2819                         goto done;
2820                 }
2821         }
2822         scan = priv->scan;
2823         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2824
2825         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2826         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2827
2828         if (iwl_is_associated(priv)) {
2829                 u16 interval = 0;
2830                 u32 extra;
2831                 u32 suspend_time = 100;
2832                 u32 scan_suspend_time = 100;
2833                 unsigned long flags;
2834
2835                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2836
2837                 spin_lock_irqsave(&priv->lock, flags);
2838                 interval = priv->beacon_int;
2839                 spin_unlock_irqrestore(&priv->lock, flags);
2840
2841                 scan->suspend_time = 0;
2842                 scan->max_out_time = cpu_to_le32(200 * 1024);
2843                 if (!interval)
2844                         interval = suspend_time;
2845                 /*
2846                  * suspend time format:
2847                  *  0-19: beacon interval in usec (time before exec.)
2848                  * 20-23: 0
2849                  * 24-31: number of beacons (suspend between channels)
2850                  */
2851
2852                 extra = (suspend_time / interval) << 24;
2853                 scan_suspend_time = 0xFF0FFFFF &
2854                     (extra | ((suspend_time % interval) * 1024));
2855
2856                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2857                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2858                                scan_suspend_time, interval);
2859         }
2860
2861         if (priv->scan_request->n_ssids) {
2862                 int i, p = 0;
2863                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2864                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2865                         /* always does wildcard anyway */
2866                         if (!priv->scan_request->ssids[i].ssid_len)
2867                                 continue;
2868                         scan->direct_scan[p].id = WLAN_EID_SSID;
2869                         scan->direct_scan[p].len =
2870                                 priv->scan_request->ssids[i].ssid_len;
2871                         memcpy(scan->direct_scan[p].ssid,
2872                                priv->scan_request->ssids[i].ssid,
2873                                priv->scan_request->ssids[i].ssid_len);
2874                         n_probes++;
2875                         p++;
2876                 }
2877                 is_active = true;
2878         } else
2879                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2880
2881         /* We don't build a direct scan probe request; the uCode will do
2882          * that based on the direct_mask added to each channel entry */
2883         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2884         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2885         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2886
2887         /* flags + rate selection */
2888
2889         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2890                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2891                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2892                 scan->good_CRC_th = 0;
2893                 band = IEEE80211_BAND_2GHZ;
2894         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2895                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2896                 /*
2897                  * If active scaning is requested but a certain channel
2898                  * is marked passive, we can do active scanning if we
2899                  * detect transmissions.
2900                  */
2901                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2902                 band = IEEE80211_BAND_5GHZ;
2903         } else {
2904                 IWL_WARN(priv, "Invalid scan band count\n");
2905                 goto done;
2906         }
2907
2908         scan->tx_cmd.len = cpu_to_le16(
2909                         iwl_fill_probe_req(priv,
2910                                 (struct ieee80211_mgmt *)scan->data,
2911                                 priv->scan_request->ie,
2912                                 priv->scan_request->ie_len,
2913                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2914
2915         /* select Rx antennas */
2916         scan->flags |= iwl3945_get_antenna_flags(priv);
2917
2918         if (iwl_is_monitor_mode(priv))
2919                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2920
2921         scan->channel_count =
2922                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2923                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2924
2925         if (scan->channel_count == 0) {
2926                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2927                 goto done;
2928         }
2929
2930         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2931             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2932         cmd.data = scan;
2933         scan->len = cpu_to_le16(cmd.len);
2934
2935         set_bit(STATUS_SCAN_HW, &priv->status);
2936         rc = iwl_send_cmd_sync(priv, &cmd);
2937         if (rc)
2938                 goto done;
2939
2940         queue_delayed_work(priv->workqueue, &priv->scan_check,
2941                            IWL_SCAN_CHECK_WATCHDOG);
2942
2943         mutex_unlock(&priv->mutex);
2944         return;
2945
2946  done:
2947         /* can not perform scan make sure we clear scanning
2948          * bits from status so next scan request can be performed.
2949          * if we dont clear scanning status bit here all next scan
2950          * will fail
2951         */
2952         clear_bit(STATUS_SCAN_HW, &priv->status);
2953         clear_bit(STATUS_SCANNING, &priv->status);
2954
2955         /* inform mac80211 scan aborted */
2956         queue_work(priv->workqueue, &priv->scan_completed);
2957         mutex_unlock(&priv->mutex);
2958 }
2959
2960 static void iwl3945_bg_up(struct work_struct *data)
2961 {
2962         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2963
2964         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2965                 return;
2966
2967         mutex_lock(&priv->mutex);
2968         __iwl3945_up(priv);
2969         mutex_unlock(&priv->mutex);
2970 }
2971
2972 static void iwl3945_bg_restart(struct work_struct *data)
2973 {
2974         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2975
2976         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2977                 return;
2978
2979         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2980                 mutex_lock(&priv->mutex);
2981                 priv->vif = NULL;
2982                 priv->is_open = 0;
2983                 mutex_unlock(&priv->mutex);
2984                 iwl3945_down(priv);
2985                 ieee80211_restart_hw(priv->hw);
2986         } else {
2987                 iwl3945_down(priv);
2988                 queue_work(priv->workqueue, &priv->up);
2989         }
2990 }
2991
2992 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2993 {
2994         struct iwl_priv *priv =
2995             container_of(data, struct iwl_priv, rx_replenish);
2996
2997         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2998                 return;
2999
3000         mutex_lock(&priv->mutex);
3001         iwl3945_rx_replenish(priv);
3002         mutex_unlock(&priv->mutex);
3003 }
3004
3005 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3006
3007 void iwl3945_post_associate(struct iwl_priv *priv)
3008 {
3009         int rc = 0;
3010         struct ieee80211_conf *conf = NULL;
3011
3012         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3013                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3014                 return;
3015         }
3016
3017
3018         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3019                         priv->assoc_id, priv->active_rxon.bssid_addr);
3020
3021         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3022                 return;
3023
3024         if (!priv->vif || !priv->is_open)
3025                 return;
3026
3027         iwl_scan_cancel_timeout(priv, 200);
3028
3029         conf = ieee80211_get_hw_conf(priv->hw);
3030
3031         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3032         iwlcore_commit_rxon(priv);
3033
3034         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3035         iwl_setup_rxon_timing(priv);
3036         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3037                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3038         if (rc)
3039                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3040                             "Attempting to continue.\n");
3041
3042         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3043
3044         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3045
3046         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3047                         priv->assoc_id, priv->beacon_int);
3048
3049         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3050                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3051         else
3052                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3053
3054         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3055                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3056                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3057                 else
3058                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3059
3060                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3061                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3062
3063         }
3064
3065         iwlcore_commit_rxon(priv);
3066
3067         switch (priv->iw_mode) {
3068         case NL80211_IFTYPE_STATION:
3069                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3070                 break;
3071
3072         case NL80211_IFTYPE_ADHOC:
3073
3074                 priv->assoc_id = 1;
3075                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3076                 iwl3945_sync_sta(priv, IWL_STA_ID,
3077                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3078                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3079                                  CMD_ASYNC);
3080                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3081                 iwl3945_send_beacon_cmd(priv);
3082
3083                 break;
3084
3085         default:
3086                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3087                            __func__, priv->iw_mode);
3088                 break;
3089         }
3090
3091         iwl_activate_qos(priv, 0);
3092
3093         /* we have just associated, don't start scan too early */
3094         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3095 }
3096
3097 /*****************************************************************************
3098  *
3099  * mac80211 entry point functions
3100  *
3101  *****************************************************************************/
3102
3103 #define UCODE_READY_TIMEOUT     (2 * HZ)
3104
3105 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3106 {
3107         struct iwl_priv *priv = hw->priv;
3108         int ret;
3109
3110         IWL_DEBUG_MAC80211(priv, "enter\n");
3111
3112         /* we should be verifying the device is ready to be opened */
3113         mutex_lock(&priv->mutex);
3114
3115         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3116          * ucode filename and max sizes are card-specific. */
3117
3118         if (!priv->ucode_code.len) {
3119                 ret = iwl3945_read_ucode(priv);
3120                 if (ret) {
3121                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3122                         mutex_unlock(&priv->mutex);
3123                         goto out_release_irq;
3124                 }
3125         }
3126
3127         ret = __iwl3945_up(priv);
3128
3129         mutex_unlock(&priv->mutex);
3130
3131         if (ret)
3132                 goto out_release_irq;
3133
3134         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3135
3136         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3137          * mac80211 will not be run successfully. */
3138         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3139                         test_bit(STATUS_READY, &priv->status),
3140                         UCODE_READY_TIMEOUT);
3141         if (!ret) {
3142                 if (!test_bit(STATUS_READY, &priv->status)) {
3143                         IWL_ERR(priv,
3144                                 "Wait for START_ALIVE timeout after %dms.\n",
3145                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3146                         ret = -ETIMEDOUT;
3147                         goto out_release_irq;
3148                 }
3149         }
3150
3151         /* ucode is running and will send rfkill notifications,
3152          * no need to poll the killswitch state anymore */
3153         cancel_delayed_work(&priv->rfkill_poll);
3154
3155         priv->is_open = 1;
3156         IWL_DEBUG_MAC80211(priv, "leave\n");
3157         return 0;
3158
3159 out_release_irq:
3160         priv->is_open = 0;
3161         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3162         return ret;
3163 }
3164
3165 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3166 {
3167         struct iwl_priv *priv = hw->priv;
3168
3169         IWL_DEBUG_MAC80211(priv, "enter\n");
3170
3171         if (!priv->is_open) {
3172                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3173                 return;
3174         }
3175
3176         priv->is_open = 0;
3177
3178         if (iwl_is_ready_rf(priv)) {
3179                 /* stop mac, cancel any scan request and clear
3180                  * RXON_FILTER_ASSOC_MSK BIT
3181                  */
3182                 mutex_lock(&priv->mutex);
3183                 iwl_scan_cancel_timeout(priv, 100);
3184                 mutex_unlock(&priv->mutex);
3185         }
3186
3187         iwl3945_down(priv);
3188
3189         flush_workqueue(priv->workqueue);
3190
3191         /* start polling the killswitch state again */
3192         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3193                            round_jiffies_relative(2 * HZ));
3194
3195         IWL_DEBUG_MAC80211(priv, "leave\n");
3196 }
3197
3198 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3199 {
3200         struct iwl_priv *priv = hw->priv;
3201
3202         IWL_DEBUG_MAC80211(priv, "enter\n");
3203
3204         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3205                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3206
3207         if (iwl3945_tx_skb(priv, skb))
3208                 dev_kfree_skb_any(skb);
3209
3210         IWL_DEBUG_MAC80211(priv, "leave\n");
3211         return NETDEV_TX_OK;
3212 }
3213
3214 void iwl3945_config_ap(struct iwl_priv *priv)
3215 {
3216         int rc = 0;
3217
3218         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3219                 return;
3220
3221         /* The following should be done only at AP bring up */
3222         if (!(iwl_is_associated(priv))) {
3223
3224                 /* RXON - unassoc (to set timing command) */
3225                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3226                 iwlcore_commit_rxon(priv);
3227
3228                 /* RXON Timing */
3229                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3230                 iwl_setup_rxon_timing(priv);
3231                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3232                                       sizeof(priv->rxon_timing),
3233                                       &priv->rxon_timing);
3234                 if (rc)
3235                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3236                                         "Attempting to continue.\n");
3237
3238                 /* FIXME: what should be the assoc_id for AP? */
3239                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3240                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3241                         priv->staging_rxon.flags |=
3242                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3243                 else
3244                         priv->staging_rxon.flags &=
3245                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3246
3247                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3248                         if (priv->assoc_capability &
3249                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3250                                 priv->staging_rxon.flags |=
3251                                         RXON_FLG_SHORT_SLOT_MSK;
3252                         else
3253                                 priv->staging_rxon.flags &=
3254                                         ~RXON_FLG_SHORT_SLOT_MSK;
3255
3256                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3257                                 priv->staging_rxon.flags &=
3258                                         ~RXON_FLG_SHORT_SLOT_MSK;
3259                 }
3260                 /* restore RXON assoc */
3261                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3262                 iwlcore_commit_rxon(priv);
3263                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3264         }
3265         iwl3945_send_beacon_cmd(priv);
3266
3267         /* FIXME - we need to add code here to detect a totally new
3268          * configuration, reset the AP, unassoc, rxon timing, assoc,
3269          * clear sta table, add BCAST sta... */
3270 }
3271
3272 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3273                                struct ieee80211_vif *vif,
3274                                struct ieee80211_sta *sta,
3275                                struct ieee80211_key_conf *key)
3276 {
3277         struct iwl_priv *priv = hw->priv;
3278         const u8 *addr;
3279         int ret = 0;
3280         u8 sta_id = IWL_INVALID_STATION;
3281         u8 static_key;
3282
3283         IWL_DEBUG_MAC80211(priv, "enter\n");
3284
3285         if (iwl3945_mod_params.sw_crypto) {
3286                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3287                 return -EOPNOTSUPP;
3288         }
3289
3290         addr = sta ? sta->addr : iwl_bcast_addr;
3291         static_key = !iwl_is_associated(priv);
3292
3293         if (!static_key) {
3294                 sta_id = iwl_find_station(priv, addr);
3295                 if (sta_id == IWL_INVALID_STATION) {
3296                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3297                                             addr);
3298                         return -EINVAL;
3299                 }
3300         }
3301
3302         mutex_lock(&priv->mutex);
3303         iwl_scan_cancel_timeout(priv, 100);
3304         mutex_unlock(&priv->mutex);
3305
3306         switch (cmd) {
3307         case SET_KEY:
3308                 if (static_key)
3309                         ret = iwl3945_set_static_key(priv, key);
3310                 else
3311                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3312                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3313                 break;
3314         case DISABLE_KEY:
3315                 if (static_key)
3316                         ret = iwl3945_remove_static_key(priv);
3317                 else
3318                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3319                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3320                 break;
3321         default:
3322                 ret = -EINVAL;
3323         }
3324
3325         IWL_DEBUG_MAC80211(priv, "leave\n");
3326
3327         return ret;
3328 }
3329
3330 /*****************************************************************************
3331  *
3332  * sysfs attributes
3333  *
3334  *****************************************************************************/
3335
3336 #ifdef CONFIG_IWLWIFI_DEBUG
3337
3338 /*
3339  * The following adds a new attribute to the sysfs representation
3340  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3341  * used for controlling the debug level.
3342  *
3343  * See the level definitions in iwl for details.
3344  *
3345  * The debug_level being managed using sysfs below is a per device debug
3346  * level that is used instead of the global debug level if it (the per
3347  * device debug level) is set.
3348  */
3349 static ssize_t show_debug_level(struct device *d,
3350                                 struct device_attribute *attr, char *buf)
3351 {
3352         struct iwl_priv *priv = dev_get_drvdata(d);
3353         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3354 }
3355 static ssize_t store_debug_level(struct device *d,
3356                                 struct device_attribute *attr,
3357                                  const char *buf, size_t count)
3358 {
3359         struct iwl_priv *priv = dev_get_drvdata(d);
3360         unsigned long val;
3361         int ret;
3362
3363         ret = strict_strtoul(buf, 0, &val);
3364         if (ret)
3365                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3366         else {
3367                 priv->debug_level = val;
3368                 if (iwl_alloc_traffic_mem(priv))
3369                         IWL_ERR(priv,
3370                                 "Not enough memory to generate traffic log\n");
3371         }
3372         return strnlen(buf, count);
3373 }
3374
3375 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3376                         show_debug_level, store_debug_level);
3377
3378 #endif /* CONFIG_IWLWIFI_DEBUG */
3379
3380 static ssize_t show_temperature(struct device *d,
3381                                 struct device_attribute *attr, char *buf)
3382 {
3383         struct iwl_priv *priv = dev_get_drvdata(d);
3384
3385         if (!iwl_is_alive(priv))
3386                 return -EAGAIN;
3387
3388         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3389 }
3390
3391 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3392
3393 static ssize_t show_tx_power(struct device *d,
3394                              struct device_attribute *attr, char *buf)
3395 {
3396         struct iwl_priv *priv = dev_get_drvdata(d);
3397         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3398 }
3399
3400 static ssize_t store_tx_power(struct device *d,
3401                               struct device_attribute *attr,
3402                               const char *buf, size_t count)
3403 {
3404         struct iwl_priv *priv = dev_get_drvdata(d);
3405         char *p = (char *)buf;
3406         u32 val;
3407
3408         val = simple_strtoul(p, &p, 10);
3409         if (p == buf)
3410                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3411         else
3412                 iwl3945_hw_reg_set_txpower(priv, val);
3413
3414         return count;
3415 }
3416
3417 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3418
3419 static ssize_t show_flags(struct device *d,
3420                           struct device_attribute *attr, char *buf)
3421 {
3422         struct iwl_priv *priv = dev_get_drvdata(d);
3423
3424         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3425 }
3426
3427 static ssize_t store_flags(struct device *d,
3428                            struct device_attribute *attr,
3429                            const char *buf, size_t count)
3430 {
3431         struct iwl_priv *priv = dev_get_drvdata(d);
3432         u32 flags = simple_strtoul(buf, NULL, 0);
3433
3434         mutex_lock(&priv->mutex);
3435         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3436                 /* Cancel any currently running scans... */
3437                 if (iwl_scan_cancel_timeout(priv, 100))
3438                         IWL_WARN(priv, "Could not cancel scan.\n");
3439                 else {
3440                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3441                                        flags);
3442                         priv->staging_rxon.flags = cpu_to_le32(flags);
3443                         iwlcore_commit_rxon(priv);
3444                 }
3445         }
3446         mutex_unlock(&priv->mutex);
3447
3448         return count;
3449 }
3450
3451 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3452
3453 static ssize_t show_filter_flags(struct device *d,
3454                                  struct device_attribute *attr, char *buf)
3455 {
3456         struct iwl_priv *priv = dev_get_drvdata(d);
3457
3458         return sprintf(buf, "0x%04X\n",
3459                 le32_to_cpu(priv->active_rxon.filter_flags));
3460 }
3461
3462 static ssize_t store_filter_flags(struct device *d,
3463                                   struct device_attribute *attr,
3464                                   const char *buf, size_t count)
3465 {
3466         struct iwl_priv *priv = dev_get_drvdata(d);
3467         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3468
3469         mutex_lock(&priv->mutex);
3470         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3471                 /* Cancel any currently running scans... */
3472                 if (iwl_scan_cancel_timeout(priv, 100))
3473                         IWL_WARN(priv, "Could not cancel scan.\n");
3474                 else {
3475                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3476                                        "0x%04X\n", filter_flags);
3477                         priv->staging_rxon.filter_flags =
3478                                 cpu_to_le32(filter_flags);
3479                         iwlcore_commit_rxon(priv);
3480                 }
3481         }
3482         mutex_unlock(&priv->mutex);
3483
3484         return count;
3485 }
3486
3487 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3488                    store_filter_flags);
3489
3490 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3491
3492 static ssize_t show_measurement(struct device *d,
3493                                 struct device_attribute *attr, char *buf)
3494 {
3495         struct iwl_priv *priv = dev_get_drvdata(d);
3496         struct iwl_spectrum_notification measure_report;
3497         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3498         u8 *data = (u8 *)&measure_report;
3499         unsigned long flags;
3500
3501         spin_lock_irqsave(&priv->lock, flags);
3502         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3503                 spin_unlock_irqrestore(&priv->lock, flags);
3504                 return 0;
3505         }
3506         memcpy(&measure_report, &priv->measure_report, size);
3507         priv->measurement_status = 0;
3508         spin_unlock_irqrestore(&priv->lock, flags);
3509
3510         while (size && (PAGE_SIZE - len)) {
3511                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3512                                    PAGE_SIZE - len, 1);
3513                 len = strlen(buf);
3514                 if (PAGE_SIZE - len)
3515                         buf[len++] = '\n';
3516
3517                 ofs += 16;
3518                 size -= min(size, 16U);
3519         }
3520
3521         return len;
3522 }
3523
3524 static ssize_t store_measurement(struct device *d,
3525                                  struct device_attribute *attr,
3526                                  const char *buf, size_t count)
3527 {
3528         struct iwl_priv *priv = dev_get_drvdata(d);
3529         struct ieee80211_measurement_params params = {
3530                 .channel = le16_to_cpu(priv->active_rxon.channel),
3531                 .start_time = cpu_to_le64(priv->last_tsf),
3532                 .duration = cpu_to_le16(1),
3533         };
3534         u8 type = IWL_MEASURE_BASIC;
3535         u8 buffer[32];
3536         u8 channel;
3537
3538         if (count) {
3539                 char *p = buffer;
3540                 strncpy(buffer, buf, min(sizeof(buffer), count));
3541                 channel = simple_strtoul(p, NULL, 0);
3542                 if (channel)
3543                         params.channel = channel;
3544
3545                 p = buffer;
3546                 while (*p && *p != ' ')
3547                         p++;
3548                 if (*p)
3549                         type = simple_strtoul(p + 1, NULL, 0);
3550         }
3551
3552         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3553                        "channel %d (for '%s')\n", type, params.channel, buf);
3554         iwl3945_get_measurement(priv, &params, type);
3555
3556         return count;
3557 }
3558
3559 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3560                    show_measurement, store_measurement);
3561 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3562
3563 static ssize_t store_retry_rate(struct device *d,
3564                                 struct device_attribute *attr,
3565                                 const char *buf, size_t count)
3566 {
3567         struct iwl_priv *priv = dev_get_drvdata(d);
3568
3569         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3570         if (priv->retry_rate <= 0)
3571                 priv->retry_rate = 1;
3572
3573         return count;
3574 }
3575
3576 static ssize_t show_retry_rate(struct device *d,
3577                                struct device_attribute *attr, char *buf)
3578 {
3579         struct iwl_priv *priv = dev_get_drvdata(d);
3580         return sprintf(buf, "%d", priv->retry_rate);
3581 }
3582
3583 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3584                    store_retry_rate);
3585
3586
3587 static ssize_t show_channels(struct device *d,
3588                              struct device_attribute *attr, char *buf)
3589 {
3590         /* all this shit doesn't belong into sysfs anyway */
3591         return 0;
3592 }
3593
3594 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3595
3596 static ssize_t show_statistics(struct device *d,
3597                                struct device_attribute *attr, char *buf)
3598 {
3599         struct iwl_priv *priv = dev_get_drvdata(d);
3600         u32 size = sizeof(struct iwl3945_notif_statistics);
3601         u32 len = 0, ofs = 0;
3602         u8 *data = (u8 *)&priv->statistics_39;
3603         int rc = 0;
3604
3605         if (!iwl_is_alive(priv))
3606                 return -EAGAIN;
3607
3608         mutex_lock(&priv->mutex);
3609         rc = iwl_send_statistics_request(priv, 0);
3610         mutex_unlock(&priv->mutex);
3611
3612         if (rc) {
3613                 len = sprintf(buf,
3614                               "Error sending statistics request: 0x%08X\n", rc);
3615                 return len;
3616         }
3617
3618         while (size && (PAGE_SIZE - len)) {
3619                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3620                                    PAGE_SIZE - len, 1);
3621                 len = strlen(buf);
3622                 if (PAGE_SIZE - len)
3623                         buf[len++] = '\n';
3624
3625                 ofs += 16;
3626                 size -= min(size, 16U);
3627         }
3628
3629         return len;
3630 }
3631
3632 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3633
3634 static ssize_t show_antenna(struct device *d,
3635                             struct device_attribute *attr, char *buf)
3636 {
3637         struct iwl_priv *priv = dev_get_drvdata(d);
3638
3639         if (!iwl_is_alive(priv))
3640                 return -EAGAIN;
3641
3642         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3643 }
3644
3645 static ssize_t store_antenna(struct device *d,
3646                              struct device_attribute *attr,
3647                              const char *buf, size_t count)
3648 {
3649         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3650         int ant;
3651
3652         if (count == 0)
3653                 return 0;
3654
3655         if (sscanf(buf, "%1i", &ant) != 1) {
3656                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3657                 return count;
3658         }
3659
3660         if ((ant >= 0) && (ant <= 2)) {
3661                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3662                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3663         } else
3664                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3665
3666
3667         return count;
3668 }
3669
3670 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3671
3672 static ssize_t show_status(struct device *d,
3673                            struct device_attribute *attr, char *buf)
3674 {
3675         struct iwl_priv *priv = dev_get_drvdata(d);
3676         if (!iwl_is_alive(priv))
3677                 return -EAGAIN;
3678         return sprintf(buf, "0x%08x\n", (int)priv->status);
3679 }
3680
3681 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3682
3683 static ssize_t dump_error_log(struct device *d,
3684                               struct device_attribute *attr,
3685                               const char *buf, size_t count)
3686 {
3687         struct iwl_priv *priv = dev_get_drvdata(d);
3688         char *p = (char *)buf;
3689
3690         if (p[0] == '1')
3691                 iwl3945_dump_nic_error_log(priv);
3692
3693         return strnlen(buf, count);
3694 }
3695
3696 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3697
3698 /*****************************************************************************
3699  *
3700  * driver setup and tear down
3701  *
3702  *****************************************************************************/
3703
3704 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3705 {
3706         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3707
3708         init_waitqueue_head(&priv->wait_command_queue);
3709
3710         INIT_WORK(&priv->up, iwl3945_bg_up);
3711         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3712         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3713         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3714         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3715         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3716         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3717         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3718         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3719         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3720         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3721
3722         iwl3945_hw_setup_deferred_work(priv);
3723
3724         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3725                      iwl3945_irq_tasklet, (unsigned long)priv);
3726 }
3727
3728 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3729 {
3730         iwl3945_hw_cancel_deferred_work(priv);
3731
3732         cancel_delayed_work_sync(&priv->init_alive_start);
3733         cancel_delayed_work(&priv->scan_check);
3734         cancel_delayed_work(&priv->alive_start);
3735         cancel_work_sync(&priv->beacon_update);
3736 }
3737
3738 static struct attribute *iwl3945_sysfs_entries[] = {
3739         &dev_attr_antenna.attr,
3740         &dev_attr_channels.attr,
3741         &dev_attr_dump_errors.attr,
3742         &dev_attr_flags.attr,
3743         &dev_attr_filter_flags.attr,
3744 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3745         &dev_attr_measurement.attr,
3746 #endif
3747         &dev_attr_retry_rate.attr,
3748         &dev_attr_statistics.attr,
3749         &dev_attr_status.attr,
3750         &dev_attr_temperature.attr,
3751         &dev_attr_tx_power.attr,
3752 #ifdef CONFIG_IWLWIFI_DEBUG
3753         &dev_attr_debug_level.attr,
3754 #endif
3755         NULL
3756 };
3757
3758 static struct attribute_group iwl3945_attribute_group = {
3759         .name = NULL,           /* put in device directory */
3760         .attrs = iwl3945_sysfs_entries,
3761 };
3762
3763 static struct ieee80211_ops iwl3945_hw_ops = {
3764         .tx = iwl3945_mac_tx,
3765         .start = iwl3945_mac_start,
3766         .stop = iwl3945_mac_stop,
3767         .add_interface = iwl_mac_add_interface,
3768         .remove_interface = iwl_mac_remove_interface,
3769         .config = iwl_mac_config,
3770         .configure_filter = iwl_configure_filter,
3771         .set_key = iwl3945_mac_set_key,
3772         .get_tx_stats = iwl_mac_get_tx_stats,
3773         .conf_tx = iwl_mac_conf_tx,
3774         .reset_tsf = iwl_mac_reset_tsf,
3775         .bss_info_changed = iwl_bss_info_changed,
3776         .hw_scan = iwl_mac_hw_scan
3777 };
3778
3779 static int iwl3945_init_drv(struct iwl_priv *priv)
3780 {
3781         int ret;
3782         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3783
3784         priv->retry_rate = 1;
3785         priv->ibss_beacon = NULL;
3786
3787         spin_lock_init(&priv->lock);
3788         spin_lock_init(&priv->sta_lock);
3789         spin_lock_init(&priv->hcmd_lock);
3790
3791         INIT_LIST_HEAD(&priv->free_frames);
3792
3793         mutex_init(&priv->mutex);
3794
3795         /* Clear the driver's (not device's) station table */
3796         iwl_clear_stations_table(priv);
3797
3798         priv->data_retry_limit = -1;
3799         priv->ieee_channels = NULL;
3800         priv->ieee_rates = NULL;
3801         priv->band = IEEE80211_BAND_2GHZ;
3802
3803         priv->iw_mode = NL80211_IFTYPE_STATION;
3804
3805         iwl_reset_qos(priv);
3806
3807         priv->qos_data.qos_active = 0;
3808         priv->qos_data.qos_cap.val = 0;
3809
3810         priv->rates_mask = IWL_RATES_MASK;
3811         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3812
3813         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3814                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3815                          eeprom->version);
3816                 ret = -EINVAL;
3817                 goto err;
3818         }
3819         ret = iwl_init_channel_map(priv);
3820         if (ret) {
3821                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3822                 goto err;
3823         }
3824
3825         /* Set up txpower settings in driver for all channels */
3826         if (iwl3945_txpower_set_from_eeprom(priv)) {
3827                 ret = -EIO;
3828                 goto err_free_channel_map;
3829         }
3830
3831         ret = iwlcore_init_geos(priv);
3832         if (ret) {
3833                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3834                 goto err_free_channel_map;
3835         }
3836         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3837
3838         return 0;
3839
3840 err_free_channel_map:
3841         iwl_free_channel_map(priv);
3842 err:
3843         return ret;
3844 }
3845
3846 static int iwl3945_setup_mac(struct iwl_priv *priv)
3847 {
3848         int ret;
3849         struct ieee80211_hw *hw = priv->hw;
3850
3851         hw->rate_control_algorithm = "iwl-3945-rs";
3852         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3853
3854         /* Tell mac80211 our characteristics */
3855         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3856                     IEEE80211_HW_NOISE_DBM |
3857                     IEEE80211_HW_SPECTRUM_MGMT |
3858                     IEEE80211_HW_SUPPORTS_PS |
3859                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3860
3861         hw->wiphy->interface_modes =
3862                 BIT(NL80211_IFTYPE_STATION) |
3863                 BIT(NL80211_IFTYPE_ADHOC);
3864
3865         hw->wiphy->custom_regulatory = true;
3866
3867         /* Firmware does not support this */
3868         hw->wiphy->disable_beacon_hints = true;
3869
3870         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3871         /* we create the 802.11 header and a zero-length SSID element */
3872         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3873
3874         /* Default value; 4 EDCA QOS priorities */
3875         hw->queues = 4;
3876
3877         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3878                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3879                         &priv->bands[IEEE80211_BAND_2GHZ];
3880
3881         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3882                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3883                         &priv->bands[IEEE80211_BAND_5GHZ];
3884
3885         ret = ieee80211_register_hw(priv->hw);
3886         if (ret) {
3887                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3888                 return ret;
3889         }
3890         priv->mac80211_registered = 1;
3891
3892         return 0;
3893 }
3894
3895 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3896 {
3897         int err = 0;
3898         struct iwl_priv *priv;
3899         struct ieee80211_hw *hw;
3900         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3901         struct iwl3945_eeprom *eeprom;
3902         unsigned long flags;
3903
3904         /***********************
3905          * 1. Allocating HW data
3906          * ********************/
3907
3908         /* mac80211 allocates memory for this device instance, including
3909          *   space for this driver's private structure */
3910         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3911         if (hw == NULL) {
3912                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3913                 err = -ENOMEM;
3914                 goto out;
3915         }
3916         priv = hw->priv;
3917         SET_IEEE80211_DEV(hw, &pdev->dev);
3918
3919         /*
3920          * Disabling hardware scan means that mac80211 will perform scans
3921          * "the hard way", rather than using device's scan.
3922          */
3923         if (iwl3945_mod_params.disable_hw_scan) {
3924                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3925                 iwl3945_hw_ops.hw_scan = NULL;
3926         }
3927
3928
3929         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3930         priv->cfg = cfg;
3931         priv->pci_dev = pdev;
3932         priv->inta_mask = CSR_INI_SET_MASK;
3933
3934 #ifdef CONFIG_IWLWIFI_DEBUG
3935         atomic_set(&priv->restrict_refcnt, 0);
3936 #endif
3937         if (iwl_alloc_traffic_mem(priv))
3938                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3939
3940         /***************************
3941          * 2. Initializing PCI bus
3942          * *************************/
3943         if (pci_enable_device(pdev)) {
3944                 err = -ENODEV;
3945                 goto out_ieee80211_free_hw;
3946         }
3947
3948         pci_set_master(pdev);
3949
3950         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3951         if (!err)
3952                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3953         if (err) {
3954                 IWL_WARN(priv, "No suitable DMA available.\n");
3955                 goto out_pci_disable_device;
3956         }
3957
3958         pci_set_drvdata(pdev, priv);
3959         err = pci_request_regions(pdev, DRV_NAME);
3960         if (err)
3961                 goto out_pci_disable_device;
3962
3963         /***********************
3964          * 3. Read REV Register
3965          * ********************/
3966         priv->hw_base = pci_iomap(pdev, 0, 0);
3967         if (!priv->hw_base) {
3968                 err = -ENODEV;
3969                 goto out_pci_release_regions;
3970         }
3971
3972         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3973                         (unsigned long long) pci_resource_len(pdev, 0));
3974         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3975
3976         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3977          * PCI Tx retries from interfering with C3 CPU state */
3978         pci_write_config_byte(pdev, 0x41, 0x00);
3979
3980         /* this spin lock will be used in apm_ops.init and EEPROM access
3981          * we should init now
3982          */
3983         spin_lock_init(&priv->reg_lock);
3984
3985         /* amp init */
3986         err = priv->cfg->ops->lib->apm_ops.init(priv);
3987         if (err < 0) {
3988                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
3989                 goto out_iounmap;
3990         }
3991
3992         /***********************
3993          * 4. Read EEPROM
3994          * ********************/
3995
3996         /* Read the EEPROM */
3997         err = iwl_eeprom_init(priv);
3998         if (err) {
3999                 IWL_ERR(priv, "Unable to init EEPROM\n");
4000                 goto out_iounmap;
4001         }
4002         /* MAC Address location in EEPROM same for 3945/4965 */
4003         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4004         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4005         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4006         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4007
4008         /***********************
4009          * 5. Setup HW Constants
4010          * ********************/
4011         /* Device-specific setup */
4012         if (iwl3945_hw_set_hw_params(priv)) {
4013                 IWL_ERR(priv, "failed to set hw settings\n");
4014                 goto out_eeprom_free;
4015         }
4016
4017         /***********************
4018          * 6. Setup priv
4019          * ********************/
4020
4021         err = iwl3945_init_drv(priv);
4022         if (err) {
4023                 IWL_ERR(priv, "initializing driver failed\n");
4024                 goto out_unset_hw_params;
4025         }
4026
4027         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4028                 priv->cfg->name);
4029
4030         /***********************
4031          * 7. Setup Services
4032          * ********************/
4033
4034         spin_lock_irqsave(&priv->lock, flags);
4035         iwl_disable_interrupts(priv);
4036         spin_unlock_irqrestore(&priv->lock, flags);
4037
4038         pci_enable_msi(priv->pci_dev);
4039
4040         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4041                           IRQF_SHARED, DRV_NAME, priv);
4042         if (err) {
4043                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4044                 goto out_disable_msi;
4045         }
4046
4047         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4048         if (err) {
4049                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4050                 goto out_release_irq;
4051         }
4052
4053         iwl_set_rxon_channel(priv,
4054                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4055         iwl3945_setup_deferred_work(priv);
4056         iwl3945_setup_rx_handlers(priv);
4057
4058         /*********************************
4059          * 8. Setup and Register mac80211
4060          * *******************************/
4061
4062         iwl_enable_interrupts(priv);
4063
4064         err = iwl3945_setup_mac(priv);
4065         if (err)
4066                 goto  out_remove_sysfs;
4067
4068         err = iwl_dbgfs_register(priv, DRV_NAME);
4069         if (err)
4070                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4071
4072         /* Start monitoring the killswitch */
4073         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4074                            2 * HZ);
4075
4076         return 0;
4077
4078  out_remove_sysfs:
4079         destroy_workqueue(priv->workqueue);
4080         priv->workqueue = NULL;
4081         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4082  out_release_irq:
4083         free_irq(priv->pci_dev->irq, priv);
4084  out_disable_msi:
4085         pci_disable_msi(priv->pci_dev);
4086         iwlcore_free_geos(priv);
4087         iwl_free_channel_map(priv);
4088  out_unset_hw_params:
4089         iwl3945_unset_hw_params(priv);
4090  out_eeprom_free:
4091         iwl_eeprom_free(priv);
4092  out_iounmap:
4093         pci_iounmap(pdev, priv->hw_base);
4094  out_pci_release_regions:
4095         pci_release_regions(pdev);
4096  out_pci_disable_device:
4097         pci_set_drvdata(pdev, NULL);
4098         pci_disable_device(pdev);
4099  out_ieee80211_free_hw:
4100         ieee80211_free_hw(priv->hw);
4101         iwl_free_traffic_mem(priv);
4102  out:
4103         return err;
4104 }
4105
4106 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4107 {
4108         struct iwl_priv *priv = pci_get_drvdata(pdev);
4109         unsigned long flags;
4110
4111         if (!priv)
4112                 return;
4113
4114         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4115
4116         iwl_dbgfs_unregister(priv);
4117
4118         set_bit(STATUS_EXIT_PENDING, &priv->status);
4119
4120         if (priv->mac80211_registered) {
4121                 ieee80211_unregister_hw(priv->hw);
4122                 priv->mac80211_registered = 0;
4123         } else {
4124                 iwl3945_down(priv);
4125         }
4126
4127         /* make sure we flush any pending irq or
4128          * tasklet for the driver
4129          */
4130         spin_lock_irqsave(&priv->lock, flags);
4131         iwl_disable_interrupts(priv);
4132         spin_unlock_irqrestore(&priv->lock, flags);
4133
4134         iwl_synchronize_irq(priv);
4135
4136         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4137
4138         cancel_delayed_work_sync(&priv->rfkill_poll);
4139
4140         iwl3945_dealloc_ucode_pci(priv);
4141
4142         if (priv->rxq.bd)
4143                 iwl3945_rx_queue_free(priv, &priv->rxq);
4144         iwl3945_hw_txq_ctx_free(priv);
4145
4146         iwl3945_unset_hw_params(priv);
4147         iwl_clear_stations_table(priv);
4148
4149         /*netif_stop_queue(dev); */
4150         flush_workqueue(priv->workqueue);
4151
4152         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4153          * priv->workqueue... so we can't take down the workqueue
4154          * until now... */
4155         destroy_workqueue(priv->workqueue);
4156         priv->workqueue = NULL;
4157         iwl_free_traffic_mem(priv);
4158
4159         free_irq(pdev->irq, priv);
4160         pci_disable_msi(pdev);
4161
4162         pci_iounmap(pdev, priv->hw_base);
4163         pci_release_regions(pdev);
4164         pci_disable_device(pdev);
4165         pci_set_drvdata(pdev, NULL);
4166
4167         iwl_free_channel_map(priv);
4168         iwlcore_free_geos(priv);
4169         kfree(priv->scan);
4170         if (priv->ibss_beacon)
4171                 dev_kfree_skb(priv->ibss_beacon);
4172
4173         ieee80211_free_hw(priv->hw);
4174 }
4175
4176
4177 /*****************************************************************************
4178  *
4179  * driver and module entry point
4180  *
4181  *****************************************************************************/
4182
4183 static struct pci_driver iwl3945_driver = {
4184         .name = DRV_NAME,
4185         .id_table = iwl3945_hw_card_ids,
4186         .probe = iwl3945_pci_probe,
4187         .remove = __devexit_p(iwl3945_pci_remove),
4188 #ifdef CONFIG_PM
4189         .suspend = iwl_pci_suspend,
4190         .resume = iwl_pci_resume,
4191 #endif
4192 };
4193
4194 static int __init iwl3945_init(void)
4195 {
4196
4197         int ret;
4198         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4199         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4200
4201         ret = iwl3945_rate_control_register();
4202         if (ret) {
4203                 printk(KERN_ERR DRV_NAME
4204                        "Unable to register rate control algorithm: %d\n", ret);
4205                 return ret;
4206         }
4207
4208         ret = pci_register_driver(&iwl3945_driver);
4209         if (ret) {
4210                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4211                 goto error_register;
4212         }
4213
4214         return ret;
4215
4216 error_register:
4217         iwl3945_rate_control_unregister();
4218         return ret;
4219 }
4220
4221 static void __exit iwl3945_exit(void)
4222 {
4223         pci_unregister_driver(&iwl3945_driver);
4224         iwl3945_rate_control_unregister();
4225 }
4226
4227 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4228
4229 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4230 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4231 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4232 MODULE_PARM_DESC(swcrypto,
4233                  "using software crypto (default 1 [software])\n");
4234 #ifdef CONFIG_IWLWIFI_DEBUG
4235 module_param_named(debug, iwl_debug_level, uint, 0644);
4236 MODULE_PARM_DESC(debug, "debug output mask");
4237 #endif
4238 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4239 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4240 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4241 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4242
4243 module_exit(iwl3945_exit);
4244 module_init(iwl3945_init);