drivers/net/wireless/ti/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31 #include <linux/netdevice.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "reg.h"
  36 #include "io.h"
  37 #include "cmd.h"
  38 #include "event.h"
  39 #include "tx.h"
  40 #include "rx.h"
  41 #include "ps.h"
  42 #include "init.h"
  43 #include "debugfs.h"
  44 #include "boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static int wl1251_power_off(struct wl1251 *wl)
  57 {
  58         return wl->if_ops->power(wl, false);
  59 }
  60
  61 static int wl1251_power_on(struct wl1251 *wl)
  62 {
  63         return wl->if_ops->power(wl, true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         ret = 0;
 135
 136 out:
 137         release_firmware(fw);
 138
 139         return ret;
 140 }
 141
 142 static void wl1251_fw_wakeup(struct wl1251 *wl)
 143 {
 144         u32 elp_reg;
 145
 146         elp_reg = ELPCTRL_WAKE_UP;
 147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 149
 150         if (!(elp_reg & ELPCTRL_WLAN_READY))
 151                 wl1251_warning("WLAN not ready");
 152 }
 153
 154 static int wl1251_chip_wakeup(struct wl1251 *wl)
 155 {
 156         int ret;
 157
 158         ret = wl1251_power_on(wl);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 10
 217 static void wl1251_irq_work(struct work_struct *work)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl =
 221                 container_of(work, struct wl1251, irq_work);
 222         int ret;
 223
 224         mutex_lock(&wl->mutex);
 225
 226         wl1251_debug(DEBUG_IRQ, "IRQ work");
 227
 228         if (wl->state == WL1251_STATE_OFF)
 229                 goto out;
 230
 231         ret = wl1251_ps_elp_wakeup(wl);
 232         if (ret < 0)
 233                 goto out;
 234
 235         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 236
 237         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 238         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 239
 240         do {
 241                 if (wl->data_path) {
 242                         wl->rx_counter = wl1251_mem_read32(
 243                                 wl, wl->data_path->rx_control_addr);
 244
 245                         /* We handle a frmware bug here */
 246                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 247                         case 0:
 248                                 wl1251_debug(DEBUG_IRQ,
 249                                              "RX: FW and host in sync");
 250                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 251                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 252                                 break;
 253                         case 1:
 254                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 255                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 256                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 257                                 break;
 258                         case 2:
 259                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 260                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 261                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 262                                 break;
 263                         default:
 264                                 wl1251_warning(
 265                                         "RX: FW and host out of sync: %d",
 266                                         wl->rx_counter - wl->rx_handled);
 267                                 break;
 268                         }
 269
 270                         wl->rx_handled = wl->rx_counter;
 271
 272                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 273                                      wl->rx_counter);
 274                 }
 275
 276                 intr &= wl->intr_mask;
 277
 278                 if (intr == 0) {
 279                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 280                         goto out_sleep;
 281                 }
 282
 283                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 284                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 285                         wl1251_rx(wl);
 286                 }
 287
 288                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 289                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 290                         wl1251_rx(wl);
 291                 }
 292
 293                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 294                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 295                         wl1251_tx_complete(wl);
 296                 }
 297
 298                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 300                         wl1251_event_handle(wl, 0);
 301                 }
 302
 303                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 304                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 305                         wl1251_event_handle(wl, 1);
 306                 }
 307
 308                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 309                         wl1251_debug(DEBUG_IRQ,
 310                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 311
 312                 if (--ctr == 0)
 313                         break;
 314
 315                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 316         } while (intr);
 317
 318 out_sleep:
 319         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 320         wl1251_ps_elp_sleep(wl);
 321
 322 out:
 323         mutex_unlock(&wl->mutex);
 324 }
 325
 326 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 327                        u16 beacon_interval, u8 dtim_period)
 328 {
 329         int ret;
 330
 331         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 332                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 333                                      wl->tx_mgmt_frm_rate,
 334                                      wl->tx_mgmt_frm_mod);
 335         if (ret < 0)
 336                 goto out;
 337
 338         /*
 339          * Join command applies filters, and if we are not associated,
 340          * BSSID filter must be disabled for association to work.
 341          */
 342         if (is_zero_ether_addr(wl->bssid))
 343                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 344
 345         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 346                               dtim_period);
 347         if (ret < 0)
 348                 goto out;
 349
 350         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 351         if (ret < 0)
 352                 wl1251_warning("join timeout");
 353
 354 out:
 355         return ret;
 356 }
 357
 358 static void wl1251_op_tx(struct ieee80211_hw *hw,
 359                          struct ieee80211_tx_control *control,
 360                          struct sk_buff *skb)
 361 {
 362         struct wl1251 *wl = hw->priv;
 363         unsigned long flags;
 364
 365         skb_queue_tail(&wl->tx_queue, skb);
 366
 367         /*
 368          * The chip specific setup must run before the first TX packet -
 369          * before that, the tx_work will not be initialized!
 370          */
 371
 372         ieee80211_queue_work(wl->hw, &wl->tx_work);
 373
 374         /*
 375          * The workqueue is slow to process the tx_queue and we need stop
 376          * the queue here, otherwise the queue will get too long.
 377          */
 378         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 379                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 380
 381                 spin_lock_irqsave(&wl->wl_lock, flags);
 382                 ieee80211_stop_queues(wl->hw);
 383                 wl->tx_queue_stopped = true;
 384                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 385         }
 386 }
 387
 388 static int wl1251_op_start(struct ieee80211_hw *hw)
 389 {
 390         struct wl1251 *wl = hw->priv;
 391         struct wiphy *wiphy = hw->wiphy;
 392         int ret = 0;
 393
 394         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 395
 396         mutex_lock(&wl->mutex);
 397
 398         if (wl->state != WL1251_STATE_OFF) {
 399                 wl1251_error("cannot start because not in off state: %d",
 400                              wl->state);
 401                 ret = -EBUSY;
 402                 goto out;
 403         }
 404
 405         ret = wl1251_chip_wakeup(wl);
 406         if (ret < 0)
 407                 goto out;
 408
 409         ret = wl1251_boot(wl);
 410         if (ret < 0)
 411                 goto out;
 412
 413         ret = wl1251_hw_init(wl);
 414         if (ret < 0)
 415                 goto out;
 416
 417         ret = wl1251_acx_station_id(wl);
 418         if (ret < 0)
 419                 goto out;
 420
 421         wl->state = WL1251_STATE_ON;
 422
 423         wl1251_info("firmware booted (%s)", wl->fw_ver);
 424
 425         /* update hw/fw version info in wiphy struct */
 426         wiphy->hw_version = wl->chip_id;
 427         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 428
 429 out:
 430         if (ret < 0)
 431                 wl1251_power_off(wl);
 432
 433         mutex_unlock(&wl->mutex);
 434
 435         return ret;
 436 }
 437
 438 static void wl1251_op_stop(struct ieee80211_hw *hw)
 439 {
 440         struct wl1251 *wl = hw->priv;
 441
 442         wl1251_info("down");
 443
 444         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 445
 446         mutex_lock(&wl->mutex);
 447
 448         WARN_ON(wl->state != WL1251_STATE_ON);
 449
 450         if (wl->scanning) {
 451                 ieee80211_scan_completed(wl->hw, true);
 452                 wl->scanning = false;
 453         }
 454
 455         wl->state = WL1251_STATE_OFF;
 456
 457         wl1251_disable_interrupts(wl);
 458
 459         mutex_unlock(&wl->mutex);
 460
 461         cancel_work_sync(&wl->irq_work);
 462         cancel_work_sync(&wl->tx_work);
 463         cancel_delayed_work_sync(&wl->elp_work);
 464
 465         mutex_lock(&wl->mutex);
 466
 467         /* let's notify MAC80211 about the remaining pending TX frames */
 468         wl1251_tx_flush(wl);
 469         wl1251_power_off(wl);
 470
 471         eth_zero_addr(wl->bssid);
 472         wl->listen_int = 1;
 473         wl->bss_type = MAX_BSS_TYPE;
 474
 475         wl->data_in_count = 0;
 476         wl->rx_counter = 0;
 477         wl->rx_handled = 0;
 478         wl->rx_current_buffer = 0;
 479         wl->rx_last_id = 0;
 480         wl->next_tx_complete = 0;
 481         wl->elp = false;
 482         wl->station_mode = STATION_ACTIVE_MODE;
 483         wl->psm_entry_retry = 0;
 484         wl->tx_queue_stopped = false;
 485         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 486         wl->rssi_thold = 0;
 487         wl->channel = WL1251_DEFAULT_CHANNEL;
 488         wl->monitor_present = false;
 489         wl->joined = false;
 490
 491         wl1251_debugfs_reset(wl);
 492
 493         mutex_unlock(&wl->mutex);
 494 }
 495
 496 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 497                                    struct ieee80211_vif *vif)
 498 {
 499         struct wl1251 *wl = hw->priv;
 500         int ret = 0;
 501
 502         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 503                              IEEE80211_VIF_SUPPORTS_UAPSD |
 504                              IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 505
 506         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 507                      vif->type, vif->addr);
 508
 509         mutex_lock(&wl->mutex);
 510         if (wl->vif) {
 511                 ret = -EBUSY;
 512                 goto out;
 513         }
 514
 515         wl->vif = vif;
 516
 517         switch (vif->type) {
 518         case NL80211_IFTYPE_STATION:
 519                 wl->bss_type = BSS_TYPE_STA_BSS;
 520                 break;
 521         case NL80211_IFTYPE_ADHOC:
 522                 wl->bss_type = BSS_TYPE_IBSS;
 523                 break;
 524         default:
 525                 ret = -EOPNOTSUPP;
 526                 goto out;
 527         }
 528
 529         if (!ether_addr_equal_unaligned(wl->mac_addr, vif->addr)) {
 530                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 531                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 532                 ret = wl1251_acx_station_id(wl);
 533                 if (ret < 0)
 534                         goto out;
 535         }
 536
 537 out:
 538         mutex_unlock(&wl->mutex);
 539         return ret;
 540 }
 541
 542 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 543                                          struct ieee80211_vif *vif)
 544 {
 545         struct wl1251 *wl = hw->priv;
 546
 547         mutex_lock(&wl->mutex);
 548         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 549         wl->vif = NULL;
 550         eth_zero_addr(wl->bssid);
 551         mutex_unlock(&wl->mutex);
 552 }
 553
 554 static int wl1251_build_null_data(struct wl1251 *wl)
 555 {
 556         struct sk_buff *skb = NULL;
 557         int size;
 558         void *ptr;
 559         int ret = -ENOMEM;
 560
 561         if (wl->bss_type == BSS_TYPE_IBSS) {
 562                 size = sizeof(struct wl12xx_null_data_template);
 563                 ptr = NULL;
 564         } else {
 565                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 566                 if (!skb)
 567                         goto out;
 568                 size = skb->len;
 569                 ptr = skb->data;
 570         }
 571
 572         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 573
 574 out:
 575         dev_kfree_skb(skb);
 576         if (ret)
 577                 wl1251_warning("cmd buld null data failed: %d", ret);
 578
 579         return ret;
 580 }
 581
 582 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 583 {
 584         struct ieee80211_qos_hdr template;
 585
 586         memset(&template, 0, sizeof(template));
 587
 588         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 589         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 590         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 591
 592         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 593                                              IEEE80211_STYPE_QOS_NULLFUNC |
 594                                              IEEE80211_FCTL_TODS);
 595
 596         /* FIXME: not sure what priority to use here */
 597         template.qos_ctrl = cpu_to_le16(0);
 598
 599         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 600                                        sizeof(template));
 601 }
 602
 603 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 604 {
 605         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 606 }
 607
 608 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 609 {
 610         struct wl1251 *wl = hw->priv;
 611         struct ieee80211_conf *conf = &hw->conf;
 612         int channel, ret = 0;
 613
 614         channel = ieee80211_frequency_to_channel(
 615                         conf->chandef.chan->center_freq);
 616
 617         wl1251_debug(DEBUG_MAC80211,
 618                      "mac80211 config ch %d monitor %s psm %s power %d",
 619                      channel,
 620                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 621                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 622                      conf->power_level);
 623
 624         mutex_lock(&wl->mutex);
 625
 626         ret = wl1251_ps_elp_wakeup(wl);
 627         if (ret < 0)
 628                 goto out;
 629
 630         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 631                 u32 mode;
 632
 633                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 634                         wl->monitor_present = true;
 635                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 636                 } else {
 637                         wl->monitor_present = false;
 638                         mode = 0;
 639                 }
 640
 641                 ret = wl1251_acx_feature_cfg(wl, mode);
 642                 if (ret < 0)
 643                         goto out_sleep;
 644         }
 645
 646         if (channel != wl->channel) {
 647                 wl->channel = channel;
 648
 649                 /*
 650                  * Use ENABLE_RX command for channel switching when no
 651                  * interface is present (monitor mode only).
 652                  * This leaves the tx path disabled in firmware, whereas
 653                  * the usual JOIN command seems to transmit some frames
 654                  * at firmware level.
 655                  */
 656                 if (wl->vif == NULL) {
 657                         wl->joined = false;
 658                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 659                 } else {
 660                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 661                                           wl->beacon_int, wl->dtim_period);
 662                 }
 663                 if (ret < 0)
 664                         goto out_sleep;
 665         }
 666
 667         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 668                 wl1251_debug(DEBUG_PSM, "psm enabled");
 669
 670                 wl->psm_requested = true;
 671
 672                 wl->dtim_period = conf->ps_dtim_period;
 673
 674                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 675                                                   wl->dtim_period);
 676
 677                 /*
 678                  * mac80211 enables PSM only if we're already associated.
 679                  */
 680                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 681                 if (ret < 0)
 682                         goto out_sleep;
 683         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 684                 wl1251_debug(DEBUG_PSM, "psm disabled");
 685
 686                 wl->psm_requested = false;
 687
 688                 if (wl->station_mode != STATION_ACTIVE_MODE) {
 689                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 690                         if (ret < 0)
 691                                 goto out_sleep;
 692                 }
 693         }
 694
 695         if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
 696                 if (conf->flags & IEEE80211_CONF_IDLE) {
 697                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 698                         if (ret < 0)
 699                                 goto out_sleep;
 700                 } else {
 701                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 702                         if (ret < 0)
 703                                 goto out_sleep;
 704                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 705                                           wl->beacon_int, wl->dtim_period);
 706                         if (ret < 0)
 707                                 goto out_sleep;
 708                 }
 709         }
 710
 711         if (conf->power_level != wl->power_level) {
 712                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 713                 if (ret < 0)
 714                         goto out_sleep;
 715
 716                 wl->power_level = conf->power_level;
 717         }
 718
 719 out_sleep:
 720         wl1251_ps_elp_sleep(wl);
 721
 722 out:
 723         mutex_unlock(&wl->mutex);
 724
 725         return ret;
 726 }
 727
 728 struct wl1251_filter_params {
 729         bool enabled;
 730         int mc_list_length;
 731         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 732 };
 733
 734 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 735                                        struct netdev_hw_addr_list *mc_list)
 736 {
 737         struct wl1251_filter_params *fp;
 738         struct netdev_hw_addr *ha;
 739         struct wl1251 *wl = hw->priv;
 740
 741         if (unlikely(wl->state == WL1251_STATE_OFF))
 742                 return 0;
 743
 744         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 745         if (!fp) {
 746                 wl1251_error("Out of memory setting filters.");
 747                 return 0;
 748         }
 749
 750         /* update multicast filtering parameters */
 751         fp->mc_list_length = 0;
 752         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 753                 fp->enabled = false;
 754         } else {
 755                 fp->enabled = true;
 756                 netdev_hw_addr_list_for_each(ha, mc_list) {
 757                         memcpy(fp->mc_list[fp->mc_list_length],
 758                                         ha->addr, ETH_ALEN);
 759                         fp->mc_list_length++;
 760                 }
 761         }
 762
 763         return (u64)(unsigned long)fp;
 764 }
 765
 766 #define WL1251_SUPPORTED_FILTERS (FIF_ALLMULTI | \
 767                                   FIF_FCSFAIL | \
 768                                   FIF_BCN_PRBRESP_PROMISC | \
 769                                   FIF_CONTROL | \
 770                                   FIF_OTHER_BSS | \
 771                                   FIF_PROBE_REQ)
 772
 773 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 774                                        unsigned int changed,
 775                                        unsigned int *total, u64 multicast)
 776 {
 777         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 778         struct wl1251 *wl = hw->priv;
 779         int ret;
 780
 781         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 782
 783         *total &= WL1251_SUPPORTED_FILTERS;
 784         changed &= WL1251_SUPPORTED_FILTERS;
 785
 786         if (changed == 0) {
 787                 /* no filters which we support changed */
 788                 kfree(fp);
 789                 return;
 790         }
 791
 792         mutex_lock(&wl->mutex);
 793
 794         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 795         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 796
 797         if (*total & FIF_ALLMULTI)
 798                 /*
 799                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 800                  * all multicast frames
 801                  */
 802                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 803         if (*total & FIF_FCSFAIL)
 804                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 805         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 806                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 807                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 808         }
 809         if (*total & FIF_CONTROL)
 810                 wl->rx_filter |= CFG_RX_CTL_EN;
 811         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 812                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 813         if (*total & FIF_PROBE_REQ)
 814                 wl->rx_filter |= CFG_RX_PREQ_EN;
 815
 816         if (wl->state == WL1251_STATE_OFF)
 817                 goto out;
 818
 819         ret = wl1251_ps_elp_wakeup(wl);
 820         if (ret < 0)
 821                 goto out;
 822
 823         if (*total & FIF_ALLMULTI)
 824                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 825         else if (fp)
 826                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 827                                                    fp->mc_list,
 828                                                    fp->mc_list_length);
 829         if (ret < 0)
 830                 goto out;
 831
 832         /* send filters to firmware */
 833         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 834
 835         wl1251_ps_elp_sleep(wl);
 836
 837 out:
 838         mutex_unlock(&wl->mutex);
 839         kfree(fp);
 840 }
 841
 842 /* HW encryption */
 843 static int wl1251_set_key_type(struct wl1251 *wl,
 844                                struct wl1251_cmd_set_keys *key,
 845                                enum set_key_cmd cmd,
 846                                struct ieee80211_key_conf *mac80211_key,
 847                                const u8 *addr)
 848 {
 849         switch (mac80211_key->cipher) {
 850         case WLAN_CIPHER_SUITE_WEP40:
 851         case WLAN_CIPHER_SUITE_WEP104:
 852                 if (is_broadcast_ether_addr(addr))
 853                         key->key_type = KEY_WEP_DEFAULT;
 854                 else
 855                         key->key_type = KEY_WEP_ADDR;
 856
 857                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 858                 break;
 859         case WLAN_CIPHER_SUITE_TKIP:
 860                 if (is_broadcast_ether_addr(addr))
 861                         key->key_type = KEY_TKIP_MIC_GROUP;
 862                 else
 863                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 864
 865                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 866                 break;
 867         case WLAN_CIPHER_SUITE_CCMP:
 868                 if (is_broadcast_ether_addr(addr))
 869                         key->key_type = KEY_AES_GROUP;
 870                 else
 871                         key->key_type = KEY_AES_PAIRWISE;
 872                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 873                 break;
 874         default:
 875                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 876                 return -EOPNOTSUPP;
 877         }
 878
 879         return 0;
 880 }
 881
 882 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 883                              struct ieee80211_vif *vif,
 884                              struct ieee80211_sta *sta,
 885                              struct ieee80211_key_conf *key)
 886 {
 887         struct wl1251 *wl = hw->priv;
 888         struct wl1251_cmd_set_keys *wl_cmd;
 889         const u8 *addr;
 890         int ret;
 891
 892         static const u8 bcast_addr[ETH_ALEN] =
 893                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 894
 895         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 896
 897         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 898         if (!wl_cmd) {
 899                 ret = -ENOMEM;
 900                 goto out;
 901         }
 902
 903         addr = sta ? sta->addr : bcast_addr;
 904
 905         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 906         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 907         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 908                      key->cipher, key->keyidx, key->keylen, key->flags);
 909         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 910
 911         if (is_zero_ether_addr(addr)) {
 912                 /* We dont support TX only encryption */
 913                 ret = -EOPNOTSUPP;
 914                 goto out;
 915         }
 916
 917         mutex_lock(&wl->mutex);
 918
 919         switch (cmd) {
 920         case SET_KEY:
 921                 if (wl->monitor_present) {
 922                         ret = -EOPNOTSUPP;
 923                         goto out_unlock;
 924                 }
 925                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 926                 break;
 927         case DISABLE_KEY:
 928                 wl_cmd->key_action = KEY_REMOVE;
 929                 break;
 930         default:
 931                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 932                 break;
 933         }
 934
 935         ret = wl1251_ps_elp_wakeup(wl);
 936         if (ret < 0)
 937                 goto out_unlock;
 938
 939         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 940         if (ret < 0) {
 941                 wl1251_error("Set KEY type failed");
 942                 goto out_sleep;
 943         }
 944
 945         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 946                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 947
 948         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 949             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 950                 /*
 951                  * We get the key in the following form:
 952                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 953                  * but the target is expecting:
 954                  * TKIP - RX MIC - TX MIC
 955                  */
 956                 memcpy(wl_cmd->key, key->key, 16);
 957                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 958                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 959
 960         } else {
 961                 memcpy(wl_cmd->key, key->key, key->keylen);
 962         }
 963         wl_cmd->key_size = key->keylen;
 964
 965         wl_cmd->id = key->keyidx;
 966         wl_cmd->ssid_profile = 0;
 967
 968         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 969
 970         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 971         if (ret < 0) {
 972                 wl1251_warning("could not set keys");
 973                 goto out_sleep;
 974         }
 975
 976 out_sleep:
 977         wl1251_ps_elp_sleep(wl);
 978
 979 out_unlock:
 980         mutex_unlock(&wl->mutex);
 981
 982 out:
 983         kfree(wl_cmd);
 984
 985         return ret;
 986 }
 987
 988 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 989                              struct ieee80211_vif *vif,
 990                              struct ieee80211_scan_request *hw_req)
 991 {
 992         struct cfg80211_scan_request *req = &hw_req->req;
 993         struct wl1251 *wl = hw->priv;
 994         struct sk_buff *skb;
 995         size_t ssid_len = 0;
 996         u8 *ssid = NULL;
 997         int ret;
 998
 999         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1000
1001         if (req->n_ssids) {
1002                 ssid = req->ssids[0].ssid;
1003                 ssid_len = req->ssids[0].ssid_len;
1004         }
1005
1006         mutex_lock(&wl->mutex);
1007
1008         if (wl->scanning) {
1009                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1010                 ret = -EINVAL;
1011                 goto out;
1012         }
1013
1014         ret = wl1251_ps_elp_wakeup(wl);
1015         if (ret < 0)
1016                 goto out;
1017
1018         if (hw->conf.flags & IEEE80211_CONF_IDLE) {
1019                 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
1020                 if (ret < 0)
1021                         goto out_sleep;
1022                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1023                                   wl->beacon_int, wl->dtim_period);
1024                 if (ret < 0)
1025                         goto out_sleep;
1026         }
1027
1028         skb = ieee80211_probereq_get(wl->hw, wl->vif->addr, ssid, ssid_len,
1029                                      req->ie_len);
1030         if (!skb) {
1031                 ret = -ENOMEM;
1032                 goto out_idle;
1033         }
1034         if (req->ie_len)
1035                 memcpy(skb_put(skb, req->ie_len), req->ie, req->ie_len);
1036
1037         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1038                                       skb->len);
1039         dev_kfree_skb(skb);
1040         if (ret < 0)
1041                 goto out_idle;
1042
1043         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1044         if (ret < 0)
1045                 goto out_idle;
1046
1047         wl->scanning = true;
1048
1049         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1050                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1051         if (ret < 0) {
1052                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1053                 wl->scanning = false;
1054                 goto out_idle;
1055         }
1056         goto out_sleep;
1057
1058 out_idle:
1059         if (hw->conf.flags & IEEE80211_CONF_IDLE)
1060                 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
1061 out_sleep:
1062         wl1251_ps_elp_sleep(wl);
1063
1064 out:
1065         mutex_unlock(&wl->mutex);
1066
1067         return ret;
1068 }
1069
1070 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1071 {
1072         struct wl1251 *wl = hw->priv;
1073         int ret;
1074
1075         mutex_lock(&wl->mutex);
1076
1077         ret = wl1251_ps_elp_wakeup(wl);
1078         if (ret < 0)
1079                 goto out;
1080
1081         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1082         if (ret < 0)
1083                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1084
1085         wl1251_ps_elp_sleep(wl);
1086
1087 out:
1088         mutex_unlock(&wl->mutex);
1089
1090         return ret;
1091 }
1092
1093 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1094                                        struct ieee80211_vif *vif,
1095                                        struct ieee80211_bss_conf *bss_conf,
1096                                        u32 changed)
1097 {
1098         struct wl1251 *wl = hw->priv;
1099         struct sk_buff *beacon, *skb;
1100         bool enable;
1101         int ret;
1102
1103         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1104
1105         mutex_lock(&wl->mutex);
1106
1107         ret = wl1251_ps_elp_wakeup(wl);
1108         if (ret < 0)
1109                 goto out;
1110
1111         if (changed & BSS_CHANGED_CQM) {
1112                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1113                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1114                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1115                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1116                 if (ret < 0)
1117                         goto out;
1118                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1119         }
1120
1121         if ((changed & BSS_CHANGED_BSSID) &&
1122             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1123                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1124
1125                 if (!is_zero_ether_addr(wl->bssid)) {
1126                         ret = wl1251_build_null_data(wl);
1127                         if (ret < 0)
1128                                 goto out_sleep;
1129
1130                         ret = wl1251_build_qos_null_data(wl);
1131                         if (ret < 0)
1132                                 goto out_sleep;
1133
1134                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1135                                           wl->beacon_int, wl->dtim_period);
1136                         if (ret < 0)
1137                                 goto out_sleep;
1138                 }
1139         }
1140
1141         if (changed & BSS_CHANGED_ASSOC) {
1142                 if (bss_conf->assoc) {
1143                         wl->beacon_int = bss_conf->beacon_int;
1144
1145                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1146                         if (!skb)
1147                                 goto out_sleep;
1148
1149                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1150                                                       skb->data,
1151                                                       skb->len);
1152                         dev_kfree_skb(skb);
1153                         if (ret < 0)
1154                                 goto out_sleep;
1155
1156                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1157                         if (ret < 0)
1158                                 goto out_sleep;
1159                 } else {
1160                         /* use defaults when not associated */
1161                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1162                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1163                 }
1164         }
1165         if (changed & BSS_CHANGED_ERP_SLOT) {
1166                 if (bss_conf->use_short_slot)
1167                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1168                 else
1169                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1170                 if (ret < 0) {
1171                         wl1251_warning("Set slot time failed %d", ret);
1172                         goto out_sleep;
1173                 }
1174         }
1175
1176         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1177                 if (bss_conf->use_short_preamble)
1178                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1179                 else
1180                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1181         }
1182
1183         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1184                 if (bss_conf->use_cts_prot)
1185                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1186                 else
1187                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1188                 if (ret < 0) {
1189                         wl1251_warning("Set ctsprotect failed %d", ret);
1190                         goto out_sleep;
1191                 }
1192         }
1193
1194         if (changed & BSS_CHANGED_ARP_FILTER) {
1195                 __be32 addr = bss_conf->arp_addr_list[0];
1196                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1197
1198                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1199                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1200
1201                 if (ret < 0)
1202                         goto out_sleep;
1203         }
1204
1205         if (changed & BSS_CHANGED_BEACON) {
1206                 beacon = ieee80211_beacon_get(hw, vif);
1207                 if (!beacon)
1208                         goto out_sleep;
1209
1210                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1211                                               beacon->len);
1212
1213                 if (ret < 0) {
1214                         dev_kfree_skb(beacon);
1215                         goto out_sleep;
1216                 }
1217
1218                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1219                                               beacon->len);
1220
1221                 dev_kfree_skb(beacon);
1222
1223                 if (ret < 0)
1224                         goto out_sleep;
1225
1226                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1227                                   wl->beacon_int, wl->dtim_period);
1228
1229                 if (ret < 0)
1230                         goto out_sleep;
1231         }
1232
1233 out_sleep:
1234         wl1251_ps_elp_sleep(wl);
1235
1236 out:
1237         mutex_unlock(&wl->mutex);
1238 }
1239
1240
1241 /* can't be const, mac80211 writes to this */
1242 static struct ieee80211_rate wl1251_rates[] = {
1243         { .bitrate = 10,
1244           .hw_value = 0x1,
1245           .hw_value_short = 0x1, },
1246         { .bitrate = 20,
1247           .hw_value = 0x2,
1248           .hw_value_short = 0x2,
1249           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1250         { .bitrate = 55,
1251           .hw_value = 0x4,
1252           .hw_value_short = 0x4,
1253           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1254         { .bitrate = 110,
1255           .hw_value = 0x20,
1256           .hw_value_short = 0x20,
1257           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1258         { .bitrate = 60,
1259           .hw_value = 0x8,
1260           .hw_value_short = 0x8, },
1261         { .bitrate = 90,
1262           .hw_value = 0x10,
1263           .hw_value_short = 0x10, },
1264         { .bitrate = 120,
1265           .hw_value = 0x40,
1266           .hw_value_short = 0x40, },
1267         { .bitrate = 180,
1268           .hw_value = 0x80,
1269           .hw_value_short = 0x80, },
1270         { .bitrate = 240,
1271           .hw_value = 0x200,
1272           .hw_value_short = 0x200, },
1273         { .bitrate = 360,
1274          .hw_value = 0x400,
1275          .hw_value_short = 0x400, },
1276         { .bitrate = 480,
1277           .hw_value = 0x800,
1278           .hw_value_short = 0x800, },
1279         { .bitrate = 540,
1280           .hw_value = 0x1000,
1281           .hw_value_short = 0x1000, },
1282 };
1283
1284 /* can't be const, mac80211 writes to this */
1285 static struct ieee80211_channel wl1251_channels[] = {
1286         { .hw_value = 1, .center_freq = 2412},
1287         { .hw_value = 2, .center_freq = 2417},
1288         { .hw_value = 3, .center_freq = 2422},
1289         { .hw_value = 4, .center_freq = 2427},
1290         { .hw_value = 5, .center_freq = 2432},
1291         { .hw_value = 6, .center_freq = 2437},
1292         { .hw_value = 7, .center_freq = 2442},
1293         { .hw_value = 8, .center_freq = 2447},
1294         { .hw_value = 9, .center_freq = 2452},
1295         { .hw_value = 10, .center_freq = 2457},
1296         { .hw_value = 11, .center_freq = 2462},
1297         { .hw_value = 12, .center_freq = 2467},
1298         { .hw_value = 13, .center_freq = 2472},
1299 };
1300
1301 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1302                              struct ieee80211_vif *vif, u16 queue,
1303                              const struct ieee80211_tx_queue_params *params)
1304 {
1305         enum wl1251_acx_ps_scheme ps_scheme;
1306         struct wl1251 *wl = hw->priv;
1307         int ret;
1308
1309         mutex_lock(&wl->mutex);
1310
1311         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1312
1313         ret = wl1251_ps_elp_wakeup(wl);
1314         if (ret < 0)
1315                 goto out;
1316
1317         /* mac80211 uses units of 32 usec */
1318         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1319                                 params->cw_min, params->cw_max,
1320                                 params->aifs, params->txop * 32);
1321         if (ret < 0)
1322                 goto out_sleep;
1323
1324         if (params->uapsd)
1325                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1326         else
1327                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1328
1329         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1330                                  CHANNEL_TYPE_EDCF,
1331                                  wl1251_tx_get_queue(queue), ps_scheme,
1332                                  WL1251_ACX_ACK_POLICY_LEGACY);
1333         if (ret < 0)
1334                 goto out_sleep;
1335
1336 out_sleep:
1337         wl1251_ps_elp_sleep(wl);
1338
1339 out:
1340         mutex_unlock(&wl->mutex);
1341
1342         return ret;
1343 }
1344
1345 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1346                                 struct survey_info *survey)
1347 {
1348         struct wl1251 *wl = hw->priv;
1349         struct ieee80211_conf *conf = &hw->conf;
1350
1351         if (idx != 0)
1352                 return -ENOENT;
1353
1354         survey->channel = conf->chandef.chan;
1355         survey->filled = SURVEY_INFO_NOISE_DBM;
1356         survey->noise = wl->noise;
1357
1358         return 0;
1359 }
1360
1361 /* can't be const, mac80211 writes to this */
1362 static struct ieee80211_supported_band wl1251_band_2ghz = {
1363         .channels = wl1251_channels,
1364         .n_channels = ARRAY_SIZE(wl1251_channels),
1365         .bitrates = wl1251_rates,
1366         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1367 };
1368
1369 static const struct ieee80211_ops wl1251_ops = {
1370         .start = wl1251_op_start,
1371         .stop = wl1251_op_stop,
1372         .add_interface = wl1251_op_add_interface,
1373         .remove_interface = wl1251_op_remove_interface,
1374         .config = wl1251_op_config,
1375         .prepare_multicast = wl1251_op_prepare_multicast,
1376         .configure_filter = wl1251_op_configure_filter,
1377         .tx = wl1251_op_tx,
1378         .set_key = wl1251_op_set_key,
1379         .hw_scan = wl1251_op_hw_scan,
1380         .bss_info_changed = wl1251_op_bss_info_changed,
1381         .set_rts_threshold = wl1251_op_set_rts_threshold,
1382         .conf_tx = wl1251_op_conf_tx,
1383         .get_survey = wl1251_op_get_survey,
1384 };
1385
1386 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1387 {
1388         unsigned long timeout;
1389
1390         wl1251_reg_write32(wl, EE_ADDR, offset);
1391         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1392
1393         /* EE_CTL_READ clears when data is ready */
1394         timeout = jiffies + msecs_to_jiffies(100);
1395         while (1) {
1396                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1397                         break;
1398
1399                 if (time_after(jiffies, timeout))
1400                         return -ETIMEDOUT;
1401
1402                 msleep(1);
1403         }
1404
1405         *data = wl1251_reg_read32(wl, EE_DATA);
1406         return 0;
1407 }
1408
1409 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1410                               u8 *data, size_t len)
1411 {
1412         size_t i;
1413         int ret;
1414
1415         wl1251_reg_write32(wl, EE_START, 0);
1416
1417         for (i = 0; i < len; i++) {
1418                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1419                 if (ret < 0)
1420                         return ret;
1421         }
1422
1423         return 0;
1424 }
1425
1426 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1427 {
1428         u8 mac[ETH_ALEN];
1429         int i, ret;
1430
1431         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1432
1433         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1434         if (ret < 0) {
1435                 wl1251_warning("failed to read MAC address from EEPROM");
1436                 return ret;
1437         }
1438
1439         /* MAC is stored in reverse order */
1440         for (i = 0; i < ETH_ALEN; i++)
1441                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1442
1443         return 0;
1444 }
1445
1446 static int wl1251_register_hw(struct wl1251 *wl)
1447 {
1448         int ret;
1449
1450         if (wl->mac80211_registered)
1451                 return 0;
1452
1453         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1454
1455         ret = ieee80211_register_hw(wl->hw);
1456         if (ret < 0) {
1457                 wl1251_error("unable to register mac80211 hw: %d", ret);
1458                 return ret;
1459         }
1460
1461         wl->mac80211_registered = true;
1462
1463         wl1251_notice("loaded");
1464
1465         return 0;
1466 }
1467
1468 int wl1251_init_ieee80211(struct wl1251 *wl)
1469 {
1470         int ret;
1471
1472         /* The tx descriptor buffer and the TKIP space */
1473         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1474                 + WL1251_TKIP_IV_SPACE;
1475
1476         /* unit us */
1477         /* FIXME: find a proper value */
1478
1479         ieee80211_hw_set(wl->hw, SIGNAL_DBM);
1480         ieee80211_hw_set(wl->hw, SUPPORTS_PS);
1481
1482         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1483                                          BIT(NL80211_IFTYPE_ADHOC);
1484         wl->hw->wiphy->max_scan_ssids = 1;
1485         wl->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wl1251_band_2ghz;
1486
1487         wl->hw->queues = 4;
1488
1489         if (wl->use_eeprom)
1490                 wl1251_read_eeprom_mac(wl);
1491
1492         ret = wl1251_register_hw(wl);
1493         if (ret)
1494                 goto out;
1495
1496         wl1251_debugfs_init(wl);
1497         wl1251_notice("initialized");
1498
1499         ret = 0;
1500
1501 out:
1502         return ret;
1503 }
1504 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1505
1506 struct ieee80211_hw *wl1251_alloc_hw(void)
1507 {
1508         struct ieee80211_hw *hw;
1509         struct wl1251 *wl;
1510         int i;
1511         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1512
1513         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1514         if (!hw) {
1515                 wl1251_error("could not alloc ieee80211_hw");
1516                 return ERR_PTR(-ENOMEM);
1517         }
1518
1519         wl = hw->priv;
1520         memset(wl, 0, sizeof(*wl));
1521
1522         wl->hw = hw;
1523
1524         wl->data_in_count = 0;
1525
1526         skb_queue_head_init(&wl->tx_queue);
1527
1528         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1529         wl->channel = WL1251_DEFAULT_CHANNEL;
1530         wl->monitor_present = false;
1531         wl->joined = false;
1532         wl->scanning = false;
1533         wl->bss_type = MAX_BSS_TYPE;
1534         wl->default_key = 0;
1535         wl->listen_int = 1;
1536         wl->rx_counter = 0;
1537         wl->rx_handled = 0;
1538         wl->rx_current_buffer = 0;
1539         wl->rx_last_id = 0;
1540         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1541         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1542         wl->elp = false;
1543         wl->station_mode = STATION_ACTIVE_MODE;
1544         wl->psm_requested = false;
1545         wl->psm_entry_retry = 0;
1546         wl->tx_queue_stopped = false;
1547         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1548         wl->rssi_thold = 0;
1549         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1550         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1551         wl->vif = NULL;
1552
1553         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1554                 wl->tx_frames[i] = NULL;
1555
1556         wl->next_tx_complete = 0;
1557
1558         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1559         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1560
1561         /*
1562          * In case our MAC address is not correctly set,
1563          * we use a random but Nokia MAC.
1564          */
1565         memcpy(wl->mac_addr, nokia_oui, 3);
1566         get_random_bytes(wl->mac_addr + 3, 3);
1567
1568         wl->state = WL1251_STATE_OFF;
1569         mutex_init(&wl->mutex);
1570
1571         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1572         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1573
1574         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1575         if (!wl->rx_descriptor) {
1576                 wl1251_error("could not allocate memory for rx descriptor");
1577                 ieee80211_free_hw(hw);
1578                 return ERR_PTR(-ENOMEM);
1579         }
1580
1581         return hw;
1582 }
1583 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1584
1585 int wl1251_free_hw(struct wl1251 *wl)
1586 {
1587         ieee80211_unregister_hw(wl->hw);
1588
1589         wl1251_debugfs_exit(wl);
1590
1591         kfree(wl->target_mem_map);
1592         kfree(wl->data_path);
1593         vfree(wl->fw);
1594         wl->fw = NULL;
1595         kfree(wl->nvs);
1596         wl->nvs = NULL;
1597
1598         kfree(wl->rx_descriptor);
1599         wl->rx_descriptor = NULL;
1600
1601         ieee80211_free_hw(wl->hw);
1602
1603         return 0;
1604 }
1605 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1606
1607 MODULE_DESCRIPTION("TI wl1251 Wireless LAN Driver Core");
1608 MODULE_LICENSE("GPL");
1609 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1610 MODULE_FIRMWARE(WL1251_FW_NAME);
1611 MODULE_FIRMWARE(WL1251_NVS_NAME);