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