drivers/net/wireless/wl12xx/wl1251_main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Kalle Valo <kalle.valo@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #if (LINUX_VERSION_CODE == KERNEL_VERSION(2,6,28))
  30 #include <linux/device.h>
  31 #endif
  32 #include <linux/crc32.h>
  33 #include <linux/etherdevice.h>
  34 #include <linux/vmalloc.h>
  35
  36 #include "wl1251.h"
  37 #include "wl12xx_80211.h"
  38 #include "wl1251_reg.h"
  39 #include "wl1251_io.h"
  40 #include "wl1251_cmd.h"
  41 #include "wl1251_event.h"
  42 #include "wl1251_tx.h"
  43 #include "wl1251_rx.h"
  44 #include "wl1251_ps.h"
  45 #include "wl1251_init.h"
  46 #include "wl1251_debugfs.h"
  47 #include "wl1251_boot.h"
  48
  49 void wl1251_enable_interrupts(struct wl1251 *wl)
  50 {
  51         wl->if_ops->enable_irq(wl);
  52 }
  53
  54 void wl1251_disable_interrupts(struct wl1251 *wl)
  55 {
  56         wl->if_ops->disable_irq(wl);
  57 }
  58
  59 static void wl1251_power_off(struct wl1251 *wl)
  60 {
  61         wl->set_power(false);
  62 }
  63
  64 static void wl1251_power_on(struct wl1251 *wl)
  65 {
  66         wl->set_power(true);
  67 }
  68
  69 static int wl1251_fetch_firmware(struct wl1251 *wl)
  70 {
  71         const struct firmware *fw;
  72         struct device *dev = wiphy_dev(wl->hw->wiphy);
  73         int ret;
  74
  75         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  76
  77         if (ret < 0) {
  78                 wl1251_error("could not get firmware: %d", ret);
  79                 return ret;
  80         }
  81
  82         if (fw->size % 4) {
  83                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  84                              fw->size);
  85                 ret = -EILSEQ;
  86                 goto out;
  87         }
  88
  89         wl->fw_len = fw->size;
  90         wl->fw = vmalloc(wl->fw_len);
  91
  92         if (!wl->fw) {
  93                 wl1251_error("could not allocate memory for the firmware");
  94                 ret = -ENOMEM;
  95                 goto out;
  96         }
  97
  98         memcpy(wl->fw, fw->data, wl->fw_len);
  99
 100         ret = 0;
 101
 102 out:
 103         release_firmware(fw);
 104
 105         return ret;
 106 }
 107
 108 static int wl1251_fetch_nvs(struct wl1251 *wl)
 109 {
 110         const struct firmware *fw;
 111         struct device *dev = wiphy_dev(wl->hw->wiphy);
 112         int ret;
 113
 114         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 115
 116         if (ret < 0) {
 117                 wl1251_error("could not get nvs file: %d", ret);
 118                 return ret;
 119         }
 120
 121         if (fw->size % 4) {
 122                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 123                              fw->size);
 124                 ret = -EILSEQ;
 125                 goto out;
 126         }
 127
 128         wl->nvs_len = fw->size;
 129         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 130
 131         if (!wl->nvs) {
 132                 wl1251_error("could not allocate memory for the nvs file");
 133                 ret = -ENOMEM;
 134                 goto out;
 135         }
 136
 137         ret = 0;
 138
 139 out:
 140         release_firmware(fw);
 141
 142         return ret;
 143 }
 144
 145 static void wl1251_fw_wakeup(struct wl1251 *wl)
 146 {
 147         u32 elp_reg;
 148
 149         elp_reg = ELPCTRL_WAKE_UP;
 150         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 151         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 152
 153         if (!(elp_reg & ELPCTRL_WLAN_READY))
 154                 wl1251_warning("WLAN not ready");
 155 }
 156
 157 static int wl1251_chip_wakeup(struct wl1251 *wl)
 158 {
 159         int ret = 0;
 160
 161         wl1251_power_on(wl);
 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 /* Atomic irq handler */
 327 void wl1251_irq(struct wl1251 *wl)
 328 {
 329         unsigned long flags;
 330
 331         wl1251_debug(DEBUG_IRQ, "IRQ");
 332
 333         /* complete the ELP completion */
 334         spin_lock_irqsave(&wl->wl_lock, flags);
 335         if (wl->elp_compl) {
 336                 complete(wl->elp_compl);
 337                 wl->elp_compl = NULL;
 338         }
 339         spin_unlock_irqrestore(&wl->wl_lock, flags);
 340
 341         ieee80211_queue_work(wl->hw, &wl->irq_work);
 342 }
 343 EXPORT_SYMBOL_GPL(wl1251_irq);
 344
 345 static void wl1251_convert_filters(struct wl1251 *wl,
 346                                   unsigned int mac80211_filters)
 347 {
 348         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 349         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 350
 351         if (mac80211_filters & FIF_PROMISC_IN_BSS) {
 352                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 353                 wl->rx_config &= ~CFG_UNI_FILTER_EN;
 354         }
 355         if (mac80211_filters & FIF_ALLMULTI)
 356                 /*
 357                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 358                  * all multicast frames
 359                  */
 360                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 361         if (mac80211_filters & FIF_FCSFAIL)
 362                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 363         if (mac80211_filters & FIF_BCN_PRBRESP_PROMISC) {
 364                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 365                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 366         }
 367         if (mac80211_filters & FIF_CONTROL)
 368                 wl->rx_filter |= CFG_RX_CTL_EN;
 369         if (mac80211_filters & FIF_OTHER_BSS)
 370                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 371         if (mac80211_filters & FIF_PROBE_REQ)
 372                 wl->rx_filter |= CFG_RX_PREQ_EN;
 373
 374         /*
 375          * If we have no associated BSSID, the filter must be disabled
 376          * or else association will break
 377          */
 378         if (is_zero_ether_addr(wl->bssid))
 379                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 380
 381         wl1251_debug(DEBUG_FILTERS, "rx_config %04x, rx_filter %04x",
 382                 wl->rx_config, wl->rx_filter);
 383 }
 384
 385 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 386                        u16 beacon_interval, u8 dtim_period)
 387 {
 388         int ret;
 389
 390         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 391                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 392                                      wl->tx_mgmt_frm_rate,
 393                                      wl->tx_mgmt_frm_mod);
 394         if (ret < 0)
 395                 goto out;
 396
 397         /* Join uses filters, update them */
 398         wl1251_convert_filters(wl, wl->mac80211_filters);
 399
 400         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 401                               dtim_period);
 402         if (ret < 0)
 403                 goto out;
 404
 405         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 406         if (ret < 0)
 407                 wl1251_warning("join timeout");
 408
 409 out:
 410         return ret;
 411 }
 412
 413 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 414 {
 415         struct wl1251 *wl = hw->priv;
 416         unsigned long flags;
 417
 418         skb_queue_tail(&wl->tx_queue, skb);
 419
 420         /*
 421          * The chip specific setup must run before the first TX packet -
 422          * before that, the tx_work will not be initialized!
 423          */
 424
 425         ieee80211_queue_work(wl->hw, &wl->tx_work);
 426
 427         /*
 428          * The workqueue is slow to process the tx_queue and we need stop
 429          * the queue here, otherwise the queue will get too long.
 430          */
 431         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 432                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 433
 434                 spin_lock_irqsave(&wl->wl_lock, flags);
 435                 ieee80211_stop_queues(wl->hw);
 436                 wl->tx_queue_stopped = true;
 437                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 438         }
 439
 440         return NETDEV_TX_OK;
 441 }
 442
 443 static int wl1251_op_start(struct ieee80211_hw *hw)
 444 {
 445         struct wl1251 *wl = hw->priv;
 446         struct wiphy *wiphy = hw->wiphy;
 447         int ret = 0;
 448
 449         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 450
 451         mutex_lock(&wl->mutex);
 452
 453         if (wl->state != WL1251_STATE_OFF) {
 454                 wl1251_error("cannot start because not in off state: %d",
 455                              wl->state);
 456                 ret = -EBUSY;
 457                 goto out;
 458         }
 459
 460         ret = wl1251_chip_wakeup(wl);
 461         if (ret < 0)
 462                 goto out;
 463
 464         ret = wl1251_boot(wl);
 465         if (ret < 0)
 466                 goto out;
 467
 468         ret = wl1251_hw_init(wl);
 469         if (ret < 0)
 470                 goto out;
 471
 472         ret = wl1251_acx_station_id(wl);
 473         if (ret < 0)
 474                 goto out;
 475
 476         wl->state = WL1251_STATE_ON;
 477
 478         wl1251_info("firmware booted (%s)", wl->fw_ver);
 479
 480         /* update hw/fw version info in wiphy struct */
 481         wiphy->hw_version = wl->chip_id;
 482         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 483
 484 out:
 485         if (ret < 0)
 486                 wl1251_power_off(wl);
 487
 488         mutex_unlock(&wl->mutex);
 489
 490         return ret;
 491 }
 492
 493 static void wl1251_op_stop(struct ieee80211_hw *hw)
 494 {
 495         struct wl1251 *wl = hw->priv;
 496
 497         wl1251_info("down");
 498
 499         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 500
 501         mutex_lock(&wl->mutex);
 502
 503         WARN_ON(wl->state != WL1251_STATE_ON);
 504
 505         if (wl->scanning) {
 506                 mutex_unlock(&wl->mutex);
 507                 ieee80211_scan_completed(wl->hw, true);
 508                 mutex_lock(&wl->mutex);
 509                 wl->scanning = false;
 510         }
 511
 512         wl->state = WL1251_STATE_OFF;
 513
 514         wl1251_disable_interrupts(wl);
 515
 516         mutex_unlock(&wl->mutex);
 517
 518         cancel_work_sync(&wl->irq_work);
 519         cancel_work_sync(&wl->tx_work);
 520
 521         mutex_lock(&wl->mutex);
 522
 523         /* let's notify MAC80211 about the remaining pending TX frames */
 524         wl1251_tx_flush(wl);
 525         wl1251_power_off(wl);
 526
 527         memset(wl->bssid, 0, ETH_ALEN);
 528         wl->listen_int = 1;
 529         wl->bss_type = MAX_BSS_TYPE;
 530
 531         wl->data_in_count = 0;
 532         wl->rx_counter = 0;
 533         wl->rx_handled = 0;
 534         wl->rx_current_buffer = 0;
 535         wl->rx_last_id = 0;
 536         wl->next_tx_complete = 0;
 537         wl->elp = false;
 538         wl->psm = 0;
 539         wl->tx_queue_stopped = false;
 540         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 541         wl->channel = WL1251_DEFAULT_CHANNEL;
 542
 543         wl1251_debugfs_reset(wl);
 544
 545         mutex_unlock(&wl->mutex);
 546 }
 547
 548 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 549                                    struct ieee80211_vif *vif)
 550 {
 551         struct wl1251 *wl = hw->priv;
 552         int ret = 0;
 553
 554         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 555                      vif->type, vif->addr);
 556
 557         mutex_lock(&wl->mutex);
 558         if (wl->vif) {
 559                 ret = -EBUSY;
 560                 goto out;
 561         }
 562
 563         wl->vif = vif;
 564
 565         switch (vif->type) {
 566         case NL80211_IFTYPE_STATION:
 567                 wl->bss_type = BSS_TYPE_STA_BSS;
 568                 break;
 569         case NL80211_IFTYPE_ADHOC:
 570                 wl->bss_type = BSS_TYPE_IBSS;
 571                 break;
 572         default:
 573                 ret = -EOPNOTSUPP;
 574                 goto out;
 575         }
 576
 577         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 578                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 579                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 580                 ret = wl1251_acx_station_id(wl);
 581                 if (ret < 0)
 582                         goto out;
 583         }
 584
 585 out:
 586         mutex_unlock(&wl->mutex);
 587         return ret;
 588 }
 589
 590 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 591                                          struct ieee80211_vif *vif)
 592 {
 593         struct wl1251 *wl = hw->priv;
 594
 595         mutex_lock(&wl->mutex);
 596         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 597         wl->vif = NULL;
 598         mutex_unlock(&wl->mutex);
 599 }
 600
 601 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 602 {
 603         struct ieee80211_qos_hdr template;
 604
 605         memset(&template, 0, sizeof(template));
 606
 607         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 608         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 609         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 610
 611         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 612                                              IEEE80211_STYPE_QOS_NULLFUNC |
 613                                              IEEE80211_FCTL_TODS);
 614
 615         /* FIXME: not sure what priority to use here */
 616         template.qos_ctrl = cpu_to_le16(0);
 617
 618         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 619                                        sizeof(template));
 620 }
 621
 622 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 623 {
 624         struct wl1251 *wl = hw->priv;
 625         struct ieee80211_conf *conf = &hw->conf;
 626         int channel, ret = 0;
 627
 628         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 629
 630         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
 631                      channel,
 632                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 633                      conf->power_level);
 634
 635         mutex_lock(&wl->mutex);
 636
 637         ret = wl1251_ps_elp_wakeup(wl);
 638         if (ret < 0)
 639                 goto out;
 640
 641         if (channel != wl->channel) {
 642                 wl->channel = channel;
 643
 644                 /*
 645                  * Use ENABLE_RX command for channel switching when no
 646                  * interface is present (monitor mode only).
 647                  * This leaves the tx path disabled in firmware, whereas
 648                  * the usual JOIN command seems to transmit some frames
 649                  * at firmware level.
 650                  */
 651                 if (wl->vif == NULL) {
 652                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 653                 } else {
 654                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 655                                           wl->beacon_int, wl->dtim_period);
 656                 }
 657                 if (ret < 0)
 658                         goto out_sleep;
 659         }
 660
 661         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
 662                 wl1251_debug(DEBUG_PSM, "psm enabled");
 663
 664                 wl->psm_requested = true;
 665
 666                 wl->dtim_period = conf->ps_dtim_period;
 667
 668                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 669                                                   wl->dtim_period);
 670
 671                 /*
 672                  * mac80211 enables PSM only if we're already associated.
 673                  */
 674                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 675                 if (ret < 0)
 676                         goto out_sleep;
 677         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
 678                    wl->psm_requested) {
 679                 wl1251_debug(DEBUG_PSM, "psm disabled");
 680
 681                 wl->psm_requested = false;
 682
 683                 if (wl->psm) {
 684                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 685                         if (ret < 0)
 686                                 goto out_sleep;
 687                 }
 688         }
 689
 690         if (conf->power_level != wl->power_level) {
 691                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 692                 if (ret < 0)
 693                         goto out_sleep;
 694
 695                 wl->power_level = conf->power_level;
 696         }
 697
 698 out_sleep:
 699         wl1251_ps_elp_sleep(wl);
 700
 701 out:
 702         mutex_unlock(&wl->mutex);
 703
 704         return ret;
 705 }
 706
 707 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 708                                   FIF_ALLMULTI | \
 709                                   FIF_FCSFAIL | \
 710                                   FIF_BCN_PRBRESP_PROMISC | \
 711                                   FIF_CONTROL | \
 712                                   FIF_OTHER_BSS | \
 713                                   FIF_PROBE_REQ)
 714
 715 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 716                                        unsigned int changed,
 717                                        unsigned int *total,u64 multicast)
 718 {
 719         struct wl1251 *wl = hw->priv;
 720         int ret;
 721
 722         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 723         wl1251_debug(DEBUG_FILTERS, "configure filter %x %x", *total, changed);
 724
 725         *total &= WL1251_SUPPORTED_FILTERS;
 726         changed &= WL1251_SUPPORTED_FILTERS;
 727
 728         if (changed == 0)
 729                 /* no filters which we support changed */
 730                 return;
 731
 732         mutex_lock(&wl->mutex);
 733
 734         wl->mac80211_filters = *total;
 735         wl1251_convert_filters(wl, *total);
 736
 737         if (wl->state == WL1251_STATE_OFF)
 738                 goto out;
 739
 740         ret = wl1251_ps_elp_wakeup(wl);
 741         if (ret < 0)
 742                 goto out;
 743
 744         /* apply configured filters */
 745         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 746
 747         wl1251_ps_elp_sleep(wl);
 748
 749 out:
 750         mutex_unlock(&wl->mutex);
 751 }
 752
 753 /* HW encryption */
 754 static int wl1251_set_key_type(struct wl1251 *wl,
 755                                struct wl1251_cmd_set_keys *key,
 756                                enum set_key_cmd cmd,
 757                                struct ieee80211_key_conf *mac80211_key,
 758                                const u8 *addr)
 759 {
 760         switch (mac80211_key->alg) {
 761         case ALG_WEP:
 762                 if (is_broadcast_ether_addr(addr))
 763                         key->key_type = KEY_WEP_DEFAULT;
 764                 else
 765                         key->key_type = KEY_WEP_ADDR;
 766
 767                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 768                 break;
 769         case ALG_TKIP:
 770                 if (is_broadcast_ether_addr(addr))
 771                         key->key_type = KEY_TKIP_MIC_GROUP;
 772                 else
 773                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 774
 775                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 776                 break;
 777         case ALG_CCMP:
 778                 if (is_broadcast_ether_addr(addr))
 779                         key->key_type = KEY_AES_GROUP;
 780                 else
 781                         key->key_type = KEY_AES_PAIRWISE;
 782                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 783                 break;
 784         default:
 785                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
 786                 return -EOPNOTSUPP;
 787         }
 788
 789         return 0;
 790 }
 791
 792 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 793                              struct ieee80211_vif *vif,
 794                              struct ieee80211_sta *sta,
 795                              struct ieee80211_key_conf *key)
 796 {
 797         struct wl1251 *wl = hw->priv;
 798         struct wl1251_cmd_set_keys *wl_cmd;
 799         const u8 *addr;
 800         int ret;
 801
 802         static const u8 bcast_addr[ETH_ALEN] =
 803                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 804
 805         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 806
 807         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 808         if (!wl_cmd) {
 809                 ret = -ENOMEM;
 810                 goto out;
 811         }
 812
 813         addr = sta ? sta->addr : bcast_addr;
 814
 815         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 816         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 817         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 818                      key->alg, key->keyidx, key->keylen, key->flags);
 819         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 820
 821         if (is_zero_ether_addr(addr)) {
 822                 /* We dont support TX only encryption */
 823                 ret = -EOPNOTSUPP;
 824                 goto out;
 825         }
 826
 827         mutex_lock(&wl->mutex);
 828
 829         ret = wl1251_ps_elp_wakeup(wl);
 830         if (ret < 0)
 831                 goto out_unlock;
 832
 833         switch (cmd) {
 834         case SET_KEY:
 835                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 836                 break;
 837         case DISABLE_KEY:
 838                 wl_cmd->key_action = KEY_REMOVE;
 839                 break;
 840         default:
 841                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 842                 break;
 843         }
 844
 845         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 846         if (ret < 0) {
 847                 wl1251_error("Set KEY type failed");
 848                 goto out_sleep;
 849         }
 850
 851         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 852                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 853
 854         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 855             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 856                 /*
 857                  * We get the key in the following form:
 858                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 859                  * but the target is expecting:
 860                  * TKIP - RX MIC - TX MIC
 861                  */
 862                 memcpy(wl_cmd->key, key->key, 16);
 863                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 864                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 865
 866         } else {
 867                 memcpy(wl_cmd->key, key->key, key->keylen);
 868         }
 869         wl_cmd->key_size = key->keylen;
 870
 871         wl_cmd->id = key->keyidx;
 872         wl_cmd->ssid_profile = 0;
 873
 874         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 875
 876         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 877         if (ret < 0) {
 878                 wl1251_warning("could not set keys");
 879                 goto out_sleep;
 880         }
 881
 882 out_sleep:
 883         wl1251_ps_elp_sleep(wl);
 884
 885 out_unlock:
 886         mutex_unlock(&wl->mutex);
 887
 888 out:
 889         kfree(wl_cmd);
 890
 891         return ret;
 892 }
 893
 894 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 895                              struct cfg80211_scan_request *req)
 896 {
 897         struct wl1251 *wl = hw->priv;
 898         struct sk_buff *skb;
 899         size_t ssid_len = 0;
 900         u8 *ssid = NULL;
 901         int ret;
 902
 903         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 904
 905         if (req->n_ssids) {
 906                 ssid = req->ssids[0].ssid;
 907                 ssid_len = req->ssids[0].ssid_len;
 908         }
 909
 910         mutex_lock(&wl->mutex);
 911
 912         if (wl->scanning) {
 913                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
 914                 ret = -EINVAL;
 915                 goto out;
 916         }
 917
 918         ret = wl1251_ps_elp_wakeup(wl);
 919         if (ret < 0)
 920                 goto out;
 921
 922         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 923                                      req->ie, req->ie_len);
 924         if (!skb) {
 925                 ret = -ENOMEM;
 926                 goto out;
 927         }
 928
 929         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
 930                                       skb->len);
 931         dev_kfree_skb(skb);
 932         if (ret < 0)
 933                 goto out_sleep;
 934
 935         ret = wl1251_cmd_trigger_scan_to(wl, 0);
 936         if (ret < 0)
 937                 goto out_sleep;
 938
 939         wl->scanning = true;
 940
 941         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
 942                               req->n_channels, WL1251_SCAN_NUM_PROBES);
 943         if (ret < 0) {
 944                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
 945                 wl->scanning = false;
 946                 goto out_sleep;
 947         }
 948
 949 out_sleep:
 950         wl1251_ps_elp_sleep(wl);
 951
 952 out:
 953         mutex_unlock(&wl->mutex);
 954
 955         return ret;
 956 }
 957
 958 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
 959 {
 960         struct wl1251 *wl = hw->priv;
 961         int ret;
 962
 963         mutex_lock(&wl->mutex);
 964
 965         ret = wl1251_ps_elp_wakeup(wl);
 966         if (ret < 0)
 967                 goto out;
 968
 969         ret = wl1251_acx_rts_threshold(wl, (u16) value);
 970         if (ret < 0)
 971                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
 972
 973         wl1251_ps_elp_sleep(wl);
 974
 975 out:
 976         mutex_unlock(&wl->mutex);
 977
 978         return ret;
 979 }
 980
 981 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
 982                                        struct ieee80211_vif *vif,
 983                                        struct ieee80211_bss_conf *bss_conf,
 984                                        u32 changed)
 985 {
 986         struct wl1251 *wl = hw->priv;
 987         struct sk_buff *beacon, *skb;
 988         int ret;
 989
 990         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
 991
 992         mutex_lock(&wl->mutex);
 993
 994         ret = wl1251_ps_elp_wakeup(wl);
 995         if (ret < 0)
 996                 goto out;
 997
 998         if (changed & BSS_CHANGED_BSSID) {
 999                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1000
1001                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1002                 if (!skb)
1003                         goto out_sleep;
1004
1005                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1006                                               skb->data, skb->len);
1007                 dev_kfree_skb(skb);
1008                 if (ret < 0)
1009                         goto out_sleep;
1010
1011                 ret = wl1251_build_qos_null_data(wl);
1012                 if (ret < 0)
1013                         goto out;
1014
1015                 if (wl->bss_type != BSS_TYPE_IBSS) {
1016                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1017                                           wl->beacon_int, wl->dtim_period);
1018                         if (ret < 0)
1019                                 goto out_sleep;
1020                 }
1021         }
1022
1023         if (changed & BSS_CHANGED_ASSOC) {
1024                 if (bss_conf->assoc) {
1025                         wl->beacon_int = bss_conf->beacon_int;
1026
1027                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1028                         if (!skb)
1029                                 goto out_sleep;
1030
1031                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1032                                                       skb->data,
1033                                                       skb->len);
1034                         dev_kfree_skb(skb);
1035                         if (ret < 0)
1036                                 goto out_sleep;
1037
1038                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1039                         if (ret < 0)
1040                                 goto out_sleep;
1041                 } else {
1042                         /* use defaults when not associated */
1043                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1044                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1045                 }
1046         }
1047         if (changed & BSS_CHANGED_ERP_SLOT) {
1048                 if (bss_conf->use_short_slot)
1049                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1050                 else
1051                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1052                 if (ret < 0) {
1053                         wl1251_warning("Set slot time failed %d", ret);
1054                         goto out_sleep;
1055                 }
1056         }
1057
1058         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1059                 if (bss_conf->use_short_preamble)
1060                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1061                 else
1062                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1063         }
1064
1065         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1066                 if (bss_conf->use_cts_prot)
1067                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1068                 else
1069                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1070                 if (ret < 0) {
1071                         wl1251_warning("Set ctsprotect failed %d", ret);
1072                         goto out_sleep;
1073                 }
1074         }
1075
1076         if (changed & BSS_CHANGED_BEACON) {
1077                 beacon = ieee80211_beacon_get(hw, vif);
1078                 if (!beacon)
1079                         goto out_sleep;
1080
1081                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1082                                               beacon->len);
1083
1084                 if (ret < 0) {
1085                         dev_kfree_skb(beacon);
1086                         goto out_sleep;
1087                 }
1088
1089                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1090                                               beacon->len);
1091
1092                 dev_kfree_skb(beacon);
1093
1094                 if (ret < 0)
1095                         goto out_sleep;
1096
1097                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1098                                   wl->channel, wl->dtim_period);
1099
1100                 if (ret < 0)
1101                         goto out_sleep;
1102         }
1103
1104 out_sleep:
1105         wl1251_ps_elp_sleep(wl);
1106
1107 out:
1108         mutex_unlock(&wl->mutex);
1109 }
1110
1111
1112 /* can't be const, mac80211 writes to this */
1113 static struct ieee80211_rate wl1251_rates[] = {
1114         { .bitrate = 10,
1115           .hw_value = 0x1,
1116           .hw_value_short = 0x1, },
1117         { .bitrate = 20,
1118           .hw_value = 0x2,
1119           .hw_value_short = 0x2,
1120           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1121         { .bitrate = 55,
1122           .hw_value = 0x4,
1123           .hw_value_short = 0x4,
1124           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1125         { .bitrate = 110,
1126           .hw_value = 0x20,
1127           .hw_value_short = 0x20,
1128           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1129         { .bitrate = 60,
1130           .hw_value = 0x8,
1131           .hw_value_short = 0x8, },
1132         { .bitrate = 90,
1133           .hw_value = 0x10,
1134           .hw_value_short = 0x10, },
1135         { .bitrate = 120,
1136           .hw_value = 0x40,
1137           .hw_value_short = 0x40, },
1138         { .bitrate = 180,
1139           .hw_value = 0x80,
1140           .hw_value_short = 0x80, },
1141         { .bitrate = 240,
1142           .hw_value = 0x200,
1143           .hw_value_short = 0x200, },
1144         { .bitrate = 360,
1145          .hw_value = 0x400,
1146          .hw_value_short = 0x400, },
1147         { .bitrate = 480,
1148           .hw_value = 0x800,
1149           .hw_value_short = 0x800, },
1150         { .bitrate = 540,
1151           .hw_value = 0x1000,
1152           .hw_value_short = 0x1000, },
1153 };
1154
1155 /* can't be const, mac80211 writes to this */
1156 static struct ieee80211_channel wl1251_channels[] = {
1157         { .hw_value = 1, .center_freq = 2412},
1158         { .hw_value = 2, .center_freq = 2417},
1159         { .hw_value = 3, .center_freq = 2422},
1160         { .hw_value = 4, .center_freq = 2427},
1161         { .hw_value = 5, .center_freq = 2432},
1162         { .hw_value = 6, .center_freq = 2437},
1163         { .hw_value = 7, .center_freq = 2442},
1164         { .hw_value = 8, .center_freq = 2447},
1165         { .hw_value = 9, .center_freq = 2452},
1166         { .hw_value = 10, .center_freq = 2457},
1167         { .hw_value = 11, .center_freq = 2462},
1168         { .hw_value = 12, .center_freq = 2467},
1169         { .hw_value = 13, .center_freq = 2472},
1170 };
1171
1172 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1173                              const struct ieee80211_tx_queue_params *params)
1174 {
1175         enum wl1251_acx_ps_scheme ps_scheme;
1176         struct wl1251 *wl = hw->priv;
1177         int ret;
1178
1179         mutex_lock(&wl->mutex);
1180
1181         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1182
1183         ret = wl1251_ps_elp_wakeup(wl);
1184         if (ret < 0)
1185                 goto out;
1186
1187         /* mac80211 uses units of 32 usec */
1188         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1189                                 params->cw_min, params->cw_max,
1190                                 params->aifs, params->txop * 32);
1191         if (ret < 0)
1192                 goto out_sleep;
1193
1194         if (params->uapsd)
1195                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1196         else
1197                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1198
1199         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1200                                  CHANNEL_TYPE_EDCF,
1201                                  wl1251_tx_get_queue(queue), ps_scheme,
1202                                  WL1251_ACX_ACK_POLICY_LEGACY);
1203         if (ret < 0)
1204                 goto out_sleep;
1205
1206 out_sleep:
1207         wl1251_ps_elp_sleep(wl);
1208
1209 out:
1210         mutex_unlock(&wl->mutex);
1211
1212         return ret;
1213 }
1214
1215 /* can't be const, mac80211 writes to this */
1216 static struct ieee80211_supported_band wl1251_band_2ghz = {
1217         .channels = wl1251_channels,
1218         .n_channels = ARRAY_SIZE(wl1251_channels),
1219         .bitrates = wl1251_rates,
1220         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1221 };
1222
1223 static const struct ieee80211_ops wl1251_ops = {
1224         .start = wl1251_op_start,
1225         .stop = wl1251_op_stop,
1226         .add_interface = wl1251_op_add_interface,
1227         .remove_interface = wl1251_op_remove_interface,
1228         .config = wl1251_op_config,
1229         .configure_filter = wl1251_op_configure_filter,
1230         .tx = wl1251_op_tx,
1231         .set_key = wl1251_op_set_key,
1232         .hw_scan = wl1251_op_hw_scan,
1233         .bss_info_changed = wl1251_op_bss_info_changed,
1234         .set_rts_threshold = wl1251_op_set_rts_threshold,
1235         .conf_tx = wl1251_op_conf_tx,
1236 };
1237
1238 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1239 {
1240         unsigned long timeout;
1241
1242         wl1251_reg_write32(wl, EE_ADDR, offset);
1243         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1244
1245         /* EE_CTL_READ clears when data is ready */
1246         timeout = jiffies + msecs_to_jiffies(100);
1247         while (1) {
1248                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1249                         break;
1250
1251                 if (time_after(jiffies, timeout))
1252                         return -ETIMEDOUT;
1253
1254                 msleep(1);
1255         }
1256
1257         *data = wl1251_reg_read32(wl, EE_DATA);
1258         return 0;
1259 }
1260
1261 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1262                               u8 *data, size_t len)
1263 {
1264         size_t i;
1265         int ret;
1266
1267         wl1251_reg_write32(wl, EE_START, 0);
1268
1269         for (i = 0; i < len; i++) {
1270                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1271                 if (ret < 0)
1272                         return ret;
1273         }
1274
1275         return 0;
1276 }
1277
1278 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1279 {
1280         u8 mac[ETH_ALEN];
1281         int i, ret;
1282
1283         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1284
1285         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1286         if (ret < 0) {
1287                 wl1251_warning("failed to read MAC address from EEPROM");
1288                 return ret;
1289         }
1290
1291         /* MAC is stored in reverse order */
1292         for (i = 0; i < ETH_ALEN; i++)
1293                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1294
1295         return 0;
1296 }
1297
1298 static int wl1251_register_hw(struct wl1251 *wl)
1299 {
1300         int ret;
1301
1302         if (wl->mac80211_registered)
1303                 return 0;
1304
1305         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1306
1307         ret = ieee80211_register_hw(wl->hw);
1308         if (ret < 0) {
1309                 wl1251_error("unable to register mac80211 hw: %d", ret);
1310                 return ret;
1311         }
1312
1313         wl->mac80211_registered = true;
1314
1315         wl1251_notice("loaded");
1316
1317         return 0;
1318 }
1319
1320 int wl1251_init_ieee80211(struct wl1251 *wl)
1321 {
1322         int ret;
1323
1324         /* The tx descriptor buffer and the TKIP space */
1325         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1326                 + WL1251_TKIP_IV_SPACE;
1327
1328         /* unit us */
1329         /* FIXME: find a proper value */
1330         wl->hw->channel_change_time = 10000;
1331
1332         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1333                 IEEE80211_HW_NOISE_DBM |
1334                 IEEE80211_HW_SUPPORTS_PS |
1335                 IEEE80211_HW_BEACON_FILTER |
1336                 IEEE80211_HW_SUPPORTS_UAPSD;
1337
1338         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1339                                          BIT(NL80211_IFTYPE_ADHOC);
1340         wl->hw->wiphy->max_scan_ssids = 1;
1341         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1342
1343         wl->hw->queues = 4;
1344
1345         if (wl->use_eeprom)
1346                 wl1251_read_eeprom_mac(wl);
1347
1348         ret = wl1251_register_hw(wl);
1349         if (ret)
1350                 goto out;
1351
1352         wl1251_debugfs_init(wl);
1353         wl1251_notice("initialized");
1354
1355         ret = 0;
1356
1357 out:
1358         return ret;
1359 }
1360 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1361
1362 struct ieee80211_hw *wl1251_alloc_hw(void)
1363 {
1364         struct ieee80211_hw *hw;
1365         struct wl1251 *wl;
1366         int i;
1367         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1368
1369         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1370         if (!hw) {
1371                 wl1251_error("could not alloc ieee80211_hw");
1372                 return ERR_PTR(-ENOMEM);
1373         }
1374
1375         wl = hw->priv;
1376         memset(wl, 0, sizeof(*wl));
1377
1378         wl->hw = hw;
1379
1380         wl->data_in_count = 0;
1381
1382         skb_queue_head_init(&wl->tx_queue);
1383
1384         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1385         wl->channel = WL1251_DEFAULT_CHANNEL;
1386         wl->scanning = false;
1387         wl->default_key = 0;
1388         wl->listen_int = 1;
1389         wl->rx_counter = 0;
1390         wl->rx_handled = 0;
1391         wl->rx_current_buffer = 0;
1392         wl->rx_last_id = 0;
1393         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1394         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1395         wl->elp = false;
1396         wl->psm = 0;
1397         wl->psm_requested = false;
1398         wl->tx_queue_stopped = false;
1399         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1400         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1401         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1402         wl->vif = NULL;
1403
1404         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1405                 wl->tx_frames[i] = NULL;
1406
1407         wl->next_tx_complete = 0;
1408
1409         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1410         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1411
1412         /*
1413          * In case our MAC address is not correctly set,
1414          * we use a random but Nokia MAC.
1415          */
1416         memcpy(wl->mac_addr, nokia_oui, 3);
1417         get_random_bytes(wl->mac_addr + 3, 3);
1418
1419         wl->state = WL1251_STATE_OFF;
1420         mutex_init(&wl->mutex);
1421
1422         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1423         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1424
1425         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1426         if (!wl->rx_descriptor) {
1427                 wl1251_error("could not allocate memory for rx descriptor");
1428                 ieee80211_free_hw(hw);
1429                 return ERR_PTR(-ENOMEM);
1430         }
1431
1432         return hw;
1433 }
1434 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1435
1436 int wl1251_free_hw(struct wl1251 *wl)
1437 {
1438         ieee80211_unregister_hw(wl->hw);
1439
1440         wl1251_debugfs_exit(wl);
1441
1442         kfree(wl->target_mem_map);
1443         kfree(wl->data_path);
1444         vfree(wl->fw);
1445         wl->fw = NULL;
1446         kfree(wl->nvs);
1447         wl->nvs = NULL;
1448
1449         kfree(wl->rx_descriptor);
1450         wl->rx_descriptor = NULL;
1451
1452         ieee80211_free_hw(wl->hw);
1453
1454         return 0;
1455 }
1456 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1457
1458 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1459 MODULE_LICENSE("GPL");
1460 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1461 MODULE_FIRMWARE(WL1251_FW_NAME);