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

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31 #include <linux/netdevice.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "reg.h"
  36 #include "io.h"
  37 #include "cmd.h"
  38 #include "event.h"
  39 #include "tx.h"
  40 #include "rx.h"
  41 #include "ps.h"
  42 #include "init.h"
  43 #include "debugfs.h"
  44 #include "boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static int wl1251_power_off(struct wl1251 *wl)
  57 {
  58         return wl->if_ops->power(wl, false);
  59 }
  60
  61 static int wl1251_power_on(struct wl1251 *wl)
  62 {
  63         return wl->if_ops->power(wl, true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         ret = 0;
 135
 136 out:
 137         release_firmware(fw);
 138
 139         return ret;
 140 }
 141
 142 static void wl1251_fw_wakeup(struct wl1251 *wl)
 143 {
 144         u32 elp_reg;
 145
 146         elp_reg = ELPCTRL_WAKE_UP;
 147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 149
 150         if (!(elp_reg & ELPCTRL_WLAN_READY))
 151                 wl1251_warning("WLAN not ready");
 152 }
 153
 154 static int wl1251_chip_wakeup(struct wl1251 *wl)
 155 {
 156         int ret;
 157
 158         ret = wl1251_power_on(wl);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 10
 217 static void wl1251_irq_work(struct work_struct *work)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl =
 221                 container_of(work, struct wl1251, irq_work);
 222         int ret;
 223
 224         mutex_lock(&wl->mutex);
 225
 226         wl1251_debug(DEBUG_IRQ, "IRQ work");
 227
 228         if (wl->state == WL1251_STATE_OFF)
 229                 goto out;
 230
 231         ret = wl1251_ps_elp_wakeup(wl);
 232         if (ret < 0)
 233                 goto out;
 234
 235         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 236
 237         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 238         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 239
 240         do {
 241                 if (wl->data_path) {
 242                         wl->rx_counter = wl1251_mem_read32(
 243                                 wl, wl->data_path->rx_control_addr);
 244
 245                         /* We handle a frmware bug here */
 246                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 247                         case 0:
 248                                 wl1251_debug(DEBUG_IRQ,
 249                                              "RX: FW and host in sync");
 250                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 251                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 252                                 break;
 253                         case 1:
 254                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 255                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 256                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 257                                 break;
 258                         case 2:
 259                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 260                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 261                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 262                                 break;
 263                         default:
 264                                 wl1251_warning(
 265                                         "RX: FW and host out of sync: %d",
 266                                         wl->rx_counter - wl->rx_handled);
 267                                 break;
 268                         }
 269
 270                         wl->rx_handled = wl->rx_counter;
 271
 272                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 273                                      wl->rx_counter);
 274                 }
 275
 276                 intr &= wl->intr_mask;
 277
 278                 if (intr == 0) {
 279                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 280                         goto out_sleep;
 281                 }
 282
 283                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 284                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 285                         wl1251_rx(wl);
 286                 }
 287
 288                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 289                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 290                         wl1251_rx(wl);
 291                 }
 292
 293                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 294                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 295                         wl1251_tx_complete(wl);
 296                 }
 297
 298                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 300                         wl1251_event_handle(wl, 0);
 301                 }
 302
 303                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 304                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 305                         wl1251_event_handle(wl, 1);
 306                 }
 307
 308                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 309                         wl1251_debug(DEBUG_IRQ,
 310                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 311
 312                 if (--ctr == 0)
 313                         break;
 314
 315                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 316         } while (intr);
 317
 318 out_sleep:
 319         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 320         wl1251_ps_elp_sleep(wl);
 321
 322 out:
 323         mutex_unlock(&wl->mutex);
 324 }
 325
 326 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 327                        u16 beacon_interval, u8 dtim_period)
 328 {
 329         int ret;
 330
 331         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 332                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 333                                      wl->tx_mgmt_frm_rate,
 334                                      wl->tx_mgmt_frm_mod);
 335         if (ret < 0)
 336                 goto out;
 337
 338         /*
 339          * Join command applies filters, and if we are not associated,
 340          * BSSID filter must be disabled for association to work.
 341          */
 342         if (is_zero_ether_addr(wl->bssid))
 343                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 344
 345         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 346                               dtim_period);
 347         if (ret < 0)
 348                 goto out;
 349
 350         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 351         if (ret < 0)
 352                 wl1251_warning("join timeout");
 353
 354 out:
 355         return ret;
 356 }
 357
 358 static void wl1251_op_tx(struct ieee80211_hw *hw,
 359                          struct ieee80211_tx_control *control,
 360                          struct sk_buff *skb)
 361 {
 362         struct wl1251 *wl = hw->priv;
 363         unsigned long flags;
 364
 365         skb_queue_tail(&wl->tx_queue, skb);
 366
 367         /*
 368          * The chip specific setup must run before the first TX packet -
 369          * before that, the tx_work will not be initialized!
 370          */
 371
 372         ieee80211_queue_work(wl->hw, &wl->tx_work);
 373
 374         /*
 375          * The workqueue is slow to process the tx_queue and we need stop
 376          * the queue here, otherwise the queue will get too long.
 377          */
 378         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 379                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 380
 381                 spin_lock_irqsave(&wl->wl_lock, flags);
 382                 ieee80211_stop_queues(wl->hw);
 383                 wl->tx_queue_stopped = true;
 384                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 385         }
 386 }
 387
 388 static int wl1251_op_start(struct ieee80211_hw *hw)
 389 {
 390         struct wl1251 *wl = hw->priv;
 391         struct wiphy *wiphy = hw->wiphy;
 392         int ret = 0;
 393
 394         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 395
 396         mutex_lock(&wl->mutex);
 397
 398         if (wl->state != WL1251_STATE_OFF) {
 399                 wl1251_error("cannot start because not in off state: %d",
 400                              wl->state);
 401                 ret = -EBUSY;
 402                 goto out;
 403         }
 404
 405         ret = wl1251_chip_wakeup(wl);
 406         if (ret < 0)
 407                 goto out;
 408
 409         ret = wl1251_boot(wl);
 410         if (ret < 0)
 411                 goto out;
 412
 413         ret = wl1251_hw_init(wl);
 414         if (ret < 0)
 415                 goto out;
 416
 417         ret = wl1251_acx_station_id(wl);
 418         if (ret < 0)
 419                 goto out;
 420
 421         wl->state = WL1251_STATE_ON;
 422
 423         wl1251_info("firmware booted (%s)", wl->fw_ver);
 424
 425         /* update hw/fw version info in wiphy struct */
 426         wiphy->hw_version = wl->chip_id;
 427         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 428
 429 out:
 430         if (ret < 0)
 431                 wl1251_power_off(wl);
 432
 433         mutex_unlock(&wl->mutex);
 434
 435         return ret;
 436 }
 437
 438 static void wl1251_op_stop(struct ieee80211_hw *hw)
 439 {
 440         struct wl1251 *wl = hw->priv;
 441
 442         wl1251_info("down");
 443
 444         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 445
 446         mutex_lock(&wl->mutex);
 447
 448         WARN_ON(wl->state != WL1251_STATE_ON);
 449
 450         if (wl->scanning) {
 451                 struct cfg80211_scan_info info = {
 452                         .aborted = true,
 453                 };
 454
 455                 ieee80211_scan_completed(wl->hw, &info);
 456                 wl->scanning = false;
 457         }
 458
 459         wl->state = WL1251_STATE_OFF;
 460
 461         wl1251_disable_interrupts(wl);
 462
 463         mutex_unlock(&wl->mutex);
 464
 465         cancel_work_sync(&wl->irq_work);
 466         cancel_work_sync(&wl->tx_work);
 467         cancel_delayed_work_sync(&wl->elp_work);
 468
 469         mutex_lock(&wl->mutex);
 470
 471         /* let's notify MAC80211 about the remaining pending TX frames */
 472         wl1251_tx_flush(wl);
 473         wl1251_power_off(wl);
 474
 475         eth_zero_addr(wl->bssid);
 476         wl->listen_int = 1;
 477         wl->bss_type = MAX_BSS_TYPE;
 478
 479         wl->data_in_count = 0;
 480         wl->rx_counter = 0;
 481         wl->rx_handled = 0;
 482         wl->rx_current_buffer = 0;
 483         wl->rx_last_id = 0;
 484         wl->next_tx_complete = 0;
 485         wl->elp = false;
 486         wl->station_mode = STATION_ACTIVE_MODE;
 487         wl->psm_entry_retry = 0;
 488         wl->tx_queue_stopped = false;
 489         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 490         wl->rssi_thold = 0;
 491         wl->channel = WL1251_DEFAULT_CHANNEL;
 492         wl->monitor_present = false;
 493         wl->joined = false;
 494
 495         wl1251_debugfs_reset(wl);
 496
 497         mutex_unlock(&wl->mutex);
 498 }
 499
 500 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 501                                    struct ieee80211_vif *vif)
 502 {
 503         struct wl1251 *wl = hw->priv;
 504         int ret = 0;
 505
 506         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 507                              IEEE80211_VIF_SUPPORTS_UAPSD |
 508                              IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 509
 510         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 511                      vif->type, vif->addr);
 512
 513         mutex_lock(&wl->mutex);
 514         if (wl->vif) {
 515                 ret = -EBUSY;
 516                 goto out;
 517         }
 518
 519         wl->vif = vif;
 520
 521         switch (vif->type) {
 522         case NL80211_IFTYPE_STATION:
 523                 wl->bss_type = BSS_TYPE_STA_BSS;
 524                 break;
 525         case NL80211_IFTYPE_ADHOC:
 526                 wl->bss_type = BSS_TYPE_IBSS;
 527                 break;
 528         default:
 529                 ret = -EOPNOTSUPP;
 530                 goto out;
 531         }
 532
 533         if (!ether_addr_equal_unaligned(wl->mac_addr, vif->addr)) {
 534                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 535                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 536                 ret = wl1251_acx_station_id(wl);
 537                 if (ret < 0)
 538                         goto out;
 539         }
 540
 541 out:
 542         mutex_unlock(&wl->mutex);
 543         return ret;
 544 }
 545
 546 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 547                                          struct ieee80211_vif *vif)
 548 {
 549         struct wl1251 *wl = hw->priv;
 550
 551         mutex_lock(&wl->mutex);
 552         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 553         wl->vif = NULL;
 554         eth_zero_addr(wl->bssid);
 555         mutex_unlock(&wl->mutex);
 556 }
 557
 558 static int wl1251_build_null_data(struct wl1251 *wl)
 559 {
 560         struct sk_buff *skb = NULL;
 561         int size;
 562         void *ptr;
 563         int ret = -ENOMEM;
 564
 565         if (wl->bss_type == BSS_TYPE_IBSS) {
 566                 size = sizeof(struct wl12xx_null_data_template);
 567                 ptr = NULL;
 568         } else {
 569                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif, false);
 570                 if (!skb)
 571                         goto out;
 572                 size = skb->len;
 573                 ptr = skb->data;
 574         }
 575
 576         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 577
 578 out:
 579         dev_kfree_skb(skb);
 580         if (ret)
 581                 wl1251_warning("cmd buld null data failed: %d", ret);
 582
 583         return ret;
 584 }
 585
 586 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 587 {
 588         struct ieee80211_qos_hdr template;
 589
 590         memset(&template, 0, sizeof(template));
 591
 592         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 593         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 594         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 595
 596         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 597                                              IEEE80211_STYPE_QOS_NULLFUNC |
 598                                              IEEE80211_FCTL_TODS);
 599
 600         /* FIXME: not sure what priority to use here */
 601         template.qos_ctrl = cpu_to_le16(0);
 602
 603         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 604                                        sizeof(template));
 605 }
 606
 607 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 608 {
 609         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 610 }
 611
 612 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 613 {
 614         struct wl1251 *wl = hw->priv;
 615         struct ieee80211_conf *conf = &hw->conf;
 616         int channel, ret = 0;
 617
 618         channel = ieee80211_frequency_to_channel(
 619                         conf->chandef.chan->center_freq);
 620
 621         wl1251_debug(DEBUG_MAC80211,
 622                      "mac80211 config ch %d monitor %s psm %s power %d",
 623                      channel,
 624                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 625                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 626                      conf->power_level);
 627
 628         mutex_lock(&wl->mutex);
 629
 630         ret = wl1251_ps_elp_wakeup(wl);
 631         if (ret < 0)
 632                 goto out;
 633
 634         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 635                 u32 mode;
 636
 637                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 638                         wl->monitor_present = true;
 639                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 640                 } else {
 641                         wl->monitor_present = false;
 642                         mode = 0;
 643                 }
 644
 645                 ret = wl1251_acx_feature_cfg(wl, mode);
 646                 if (ret < 0)
 647                         goto out_sleep;
 648         }
 649
 650         if (channel != wl->channel) {
 651                 wl->channel = channel;
 652
 653                 /*
 654                  * Use ENABLE_RX command for channel switching when no
 655                  * interface is present (monitor mode only).
 656                  * This leaves the tx path disabled in firmware, whereas
 657                  * the usual JOIN command seems to transmit some frames
 658                  * at firmware level.
 659                  */
 660                 if (wl->vif == NULL) {
 661                         wl->joined = false;
 662                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 663                 } else {
 664                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 665                                           wl->beacon_int, wl->dtim_period);
 666                 }
 667                 if (ret < 0)
 668                         goto out_sleep;
 669         }
 670
 671         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 672                 wl1251_debug(DEBUG_PSM, "psm enabled");
 673
 674                 wl->psm_requested = true;
 675
 676                 wl->dtim_period = conf->ps_dtim_period;
 677
 678                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 679                                                   wl->dtim_period);
 680
 681                 /*
 682                  * mac80211 enables PSM only if we're already associated.
 683                  */
 684                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 685                 if (ret < 0)
 686                         goto out_sleep;
 687         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 688                 wl1251_debug(DEBUG_PSM, "psm disabled");
 689
 690                 wl->psm_requested = false;
 691
 692                 if (wl->station_mode != STATION_ACTIVE_MODE) {
 693                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 694                         if (ret < 0)
 695                                 goto out_sleep;
 696                 }
 697         }
 698
 699         if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
 700                 if (conf->flags & IEEE80211_CONF_IDLE) {
 701                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 702                         if (ret < 0)
 703                                 goto out_sleep;
 704                 } else {
 705                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 706                         if (ret < 0)
 707                                 goto out_sleep;
 708                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 709                                           wl->beacon_int, wl->dtim_period);
 710                         if (ret < 0)
 711                                 goto out_sleep;
 712                 }
 713         }
 714
 715         if (conf->power_level != wl->power_level) {
 716                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 717                 if (ret < 0)
 718                         goto out_sleep;
 719
 720                 wl->power_level = conf->power_level;
 721         }
 722
 723 out_sleep:
 724         wl1251_ps_elp_sleep(wl);
 725
 726 out:
 727         mutex_unlock(&wl->mutex);
 728
 729         return ret;
 730 }
 731
 732 struct wl1251_filter_params {
 733         bool enabled;
 734         int mc_list_length;
 735         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 736 };
 737
 738 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 739                                        struct netdev_hw_addr_list *mc_list)
 740 {
 741         struct wl1251_filter_params *fp;
 742         struct netdev_hw_addr *ha;
 743         struct wl1251 *wl = hw->priv;
 744
 745         if (unlikely(wl->state == WL1251_STATE_OFF))
 746                 return 0;
 747
 748         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 749         if (!fp) {
 750                 wl1251_error("Out of memory setting filters.");
 751                 return 0;
 752         }
 753
 754         /* update multicast filtering parameters */
 755         fp->mc_list_length = 0;
 756         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 757                 fp->enabled = false;
 758         } else {
 759                 fp->enabled = true;
 760                 netdev_hw_addr_list_for_each(ha, mc_list) {
 761                         memcpy(fp->mc_list[fp->mc_list_length],
 762                                         ha->addr, ETH_ALEN);
 763                         fp->mc_list_length++;
 764                 }
 765         }
 766
 767         return (u64)(unsigned long)fp;
 768 }
 769
 770 #define WL1251_SUPPORTED_FILTERS (FIF_ALLMULTI | \
 771                                   FIF_FCSFAIL | \
 772                                   FIF_BCN_PRBRESP_PROMISC | \
 773                                   FIF_CONTROL | \
 774                                   FIF_OTHER_BSS | \
 775                                   FIF_PROBE_REQ)
 776
 777 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 778                                        unsigned int changed,
 779                                        unsigned int *total, u64 multicast)
 780 {
 781         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 782         struct wl1251 *wl = hw->priv;
 783         int ret;
 784
 785         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 786
 787         *total &= WL1251_SUPPORTED_FILTERS;
 788         changed &= WL1251_SUPPORTED_FILTERS;
 789
 790         if (changed == 0) {
 791                 /* no filters which we support changed */
 792                 kfree(fp);
 793                 return;
 794         }
 795
 796         mutex_lock(&wl->mutex);
 797
 798         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 799         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 800
 801         if (*total & FIF_ALLMULTI)
 802                 /*
 803                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 804                  * all multicast frames
 805                  */
 806                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 807         if (*total & FIF_FCSFAIL)
 808                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 809         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 810                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 811                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 812         }
 813         if (*total & FIF_CONTROL)
 814                 wl->rx_filter |= CFG_RX_CTL_EN;
 815         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 816                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 817         if (*total & FIF_PROBE_REQ)
 818                 wl->rx_filter |= CFG_RX_PREQ_EN;
 819
 820         if (wl->state == WL1251_STATE_OFF)
 821                 goto out;
 822
 823         ret = wl1251_ps_elp_wakeup(wl);
 824         if (ret < 0)
 825                 goto out;
 826
 827         if (*total & FIF_ALLMULTI)
 828                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 829         else if (fp)
 830                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 831                                                    fp->mc_list,
 832                                                    fp->mc_list_length);
 833         if (ret < 0)
 834                 goto out;
 835
 836         /* send filters to firmware */
 837         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 838
 839         wl1251_ps_elp_sleep(wl);
 840
 841 out:
 842         mutex_unlock(&wl->mutex);
 843         kfree(fp);
 844 }
 845
 846 /* HW encryption */
 847 static int wl1251_set_key_type(struct wl1251 *wl,
 848                                struct wl1251_cmd_set_keys *key,
 849                                enum set_key_cmd cmd,
 850                                struct ieee80211_key_conf *mac80211_key,
 851                                const u8 *addr)
 852 {
 853         switch (mac80211_key->cipher) {
 854         case WLAN_CIPHER_SUITE_WEP40:
 855         case WLAN_CIPHER_SUITE_WEP104:
 856                 if (is_broadcast_ether_addr(addr))
 857                         key->key_type = KEY_WEP_DEFAULT;
 858                 else
 859                         key->key_type = KEY_WEP_ADDR;
 860
 861                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 862                 break;
 863         case WLAN_CIPHER_SUITE_TKIP:
 864                 if (is_broadcast_ether_addr(addr))
 865                         key->key_type = KEY_TKIP_MIC_GROUP;
 866                 else
 867                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 868
 869                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 870                 break;
 871         case WLAN_CIPHER_SUITE_CCMP:
 872                 if (is_broadcast_ether_addr(addr))
 873                         key->key_type = KEY_AES_GROUP;
 874                 else
 875                         key->key_type = KEY_AES_PAIRWISE;
 876                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 877                 break;
 878         default:
 879                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 880                 return -EOPNOTSUPP;
 881         }
 882
 883         return 0;
 884 }
 885
 886 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 887                              struct ieee80211_vif *vif,
 888                              struct ieee80211_sta *sta,
 889                              struct ieee80211_key_conf *key)
 890 {
 891         struct wl1251 *wl = hw->priv;
 892         struct wl1251_cmd_set_keys *wl_cmd;
 893         const u8 *addr;
 894         int ret;
 895
 896         static const u8 bcast_addr[ETH_ALEN] =
 897                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 898
 899         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 900
 901         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 902         if (!wl_cmd) {
 903                 ret = -ENOMEM;
 904                 goto out;
 905         }
 906
 907         addr = sta ? sta->addr : bcast_addr;
 908
 909         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 910         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 911         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 912                      key->cipher, key->keyidx, key->keylen, key->flags);
 913         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 914
 915         if (is_zero_ether_addr(addr)) {
 916                 /* We dont support TX only encryption */
 917                 ret = -EOPNOTSUPP;
 918                 goto out;
 919         }
 920
 921         mutex_lock(&wl->mutex);
 922
 923         switch (cmd) {
 924         case SET_KEY:
 925                 if (wl->monitor_present) {
 926                         ret = -EOPNOTSUPP;
 927                         goto out_unlock;
 928                 }
 929                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 930                 break;
 931         case DISABLE_KEY:
 932                 wl_cmd->key_action = KEY_REMOVE;
 933                 break;
 934         default:
 935                 wl1251_error("Unsupported key cmd 0x%x", cmd);
 936                 break;
 937         }
 938
 939         ret = wl1251_ps_elp_wakeup(wl);
 940         if (ret < 0)
 941                 goto out_unlock;
 942
 943         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 944         if (ret < 0) {
 945                 wl1251_error("Set KEY type failed");
 946                 goto out_sleep;
 947         }
 948
 949         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 950                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
 951
 952         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 953             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 954                 /*
 955                  * We get the key in the following form:
 956                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 957                  * but the target is expecting:
 958                  * TKIP - RX MIC - TX MIC
 959                  */
 960                 memcpy(wl_cmd->key, key->key, 16);
 961                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
 962                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
 963
 964         } else {
 965                 memcpy(wl_cmd->key, key->key, key->keylen);
 966         }
 967         wl_cmd->key_size = key->keylen;
 968
 969         wl_cmd->id = key->keyidx;
 970         wl_cmd->ssid_profile = 0;
 971
 972         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 973
 974         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 975         if (ret < 0) {
 976                 wl1251_warning("could not set keys");
 977                 goto out_sleep;
 978         }
 979
 980 out_sleep:
 981         wl1251_ps_elp_sleep(wl);
 982
 983 out_unlock:
 984         mutex_unlock(&wl->mutex);
 985
 986 out:
 987         kfree(wl_cmd);
 988
 989         return ret;
 990 }
 991
 992 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 993                              struct ieee80211_vif *vif,
 994                              struct ieee80211_scan_request *hw_req)
 995 {
 996         struct cfg80211_scan_request *req = &hw_req->req;
 997         struct wl1251 *wl = hw->priv;
 998         struct sk_buff *skb;
 999         size_t ssid_len = 0;
1000         u8 *ssid = NULL;
1001         int ret;
1002
1003         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1004
1005         if (req->n_ssids) {
1006                 ssid = req->ssids[0].ssid;
1007                 ssid_len = req->ssids[0].ssid_len;
1008         }
1009
1010         mutex_lock(&wl->mutex);
1011
1012         if (wl->scanning) {
1013                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1014                 ret = -EINVAL;
1015                 goto out;
1016         }
1017
1018         ret = wl1251_ps_elp_wakeup(wl);
1019         if (ret < 0)
1020                 goto out;
1021
1022         if (hw->conf.flags & IEEE80211_CONF_IDLE) {
1023                 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
1024                 if (ret < 0)
1025                         goto out_sleep;
1026                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1027                                   wl->beacon_int, wl->dtim_period);
1028                 if (ret < 0)
1029                         goto out_sleep;
1030         }
1031
1032         skb = ieee80211_probereq_get(wl->hw, wl->vif->addr, ssid, ssid_len,
1033                                      req->ie_len);
1034         if (!skb) {
1035                 ret = -ENOMEM;
1036                 goto out_idle;
1037         }
1038         if (req->ie_len)
1039                 skb_put_data(skb, req->ie, req->ie_len);
1040
1041         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1042                                       skb->len);
1043         dev_kfree_skb(skb);
1044         if (ret < 0)
1045                 goto out_idle;
1046
1047         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1048         if (ret < 0)
1049                 goto out_idle;
1050
1051         wl->scanning = true;
1052
1053         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1054                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1055         if (ret < 0) {
1056                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1057                 wl->scanning = false;
1058                 goto out_idle;
1059         }
1060         goto out_sleep;
1061
1062 out_idle:
1063         if (hw->conf.flags & IEEE80211_CONF_IDLE)
1064                 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
1065 out_sleep:
1066         wl1251_ps_elp_sleep(wl);
1067
1068 out:
1069         mutex_unlock(&wl->mutex);
1070
1071         return ret;
1072 }
1073
1074 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1075 {
1076         struct wl1251 *wl = hw->priv;
1077         int ret;
1078
1079         mutex_lock(&wl->mutex);
1080
1081         ret = wl1251_ps_elp_wakeup(wl);
1082         if (ret < 0)
1083                 goto out;
1084
1085         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1086         if (ret < 0)
1087                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1088
1089         wl1251_ps_elp_sleep(wl);
1090
1091 out:
1092         mutex_unlock(&wl->mutex);
1093
1094         return ret;
1095 }
1096
1097 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1098                                        struct ieee80211_vif *vif,
1099                                        struct ieee80211_bss_conf *bss_conf,
1100                                        u32 changed)
1101 {
1102         struct wl1251 *wl = hw->priv;
1103         struct sk_buff *beacon, *skb;
1104         bool enable;
1105         int ret;
1106
1107         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1108
1109         mutex_lock(&wl->mutex);
1110
1111         ret = wl1251_ps_elp_wakeup(wl);
1112         if (ret < 0)
1113                 goto out;
1114
1115         if (changed & BSS_CHANGED_CQM) {
1116                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1117                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1118                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1119                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1120                 if (ret < 0)
1121                         goto out;
1122                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1123         }
1124
1125         if ((changed & BSS_CHANGED_BSSID) &&
1126             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1127                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1128
1129                 if (!is_zero_ether_addr(wl->bssid)) {
1130                         ret = wl1251_build_null_data(wl);
1131                         if (ret < 0)
1132                                 goto out_sleep;
1133
1134                         ret = wl1251_build_qos_null_data(wl);
1135                         if (ret < 0)
1136                                 goto out_sleep;
1137
1138                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1139                                           wl->beacon_int, wl->dtim_period);
1140                         if (ret < 0)
1141                                 goto out_sleep;
1142                 }
1143         }
1144
1145         if (changed & BSS_CHANGED_ASSOC) {
1146                 if (bss_conf->assoc) {
1147                         wl->beacon_int = bss_conf->beacon_int;
1148
1149                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1150                         if (!skb)
1151                                 goto out_sleep;
1152
1153                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1154                                                       skb->data,
1155                                                       skb->len);
1156                         dev_kfree_skb(skb);
1157                         if (ret < 0)
1158                                 goto out_sleep;
1159
1160                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1161                         if (ret < 0)
1162                                 goto out_sleep;
1163                 } else {
1164                         /* use defaults when not associated */
1165                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1166                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1167                 }
1168         }
1169         if (changed & BSS_CHANGED_ERP_SLOT) {
1170                 if (bss_conf->use_short_slot)
1171                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1172                 else
1173                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1174                 if (ret < 0) {
1175                         wl1251_warning("Set slot time failed %d", ret);
1176                         goto out_sleep;
1177                 }
1178         }
1179
1180         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1181                 if (bss_conf->use_short_preamble)
1182                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1183                 else
1184                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1185         }
1186
1187         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1188                 if (bss_conf->use_cts_prot)
1189                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1190                 else
1191                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1192                 if (ret < 0) {
1193                         wl1251_warning("Set ctsprotect failed %d", ret);
1194                         goto out_sleep;
1195                 }
1196         }
1197
1198         if (changed & BSS_CHANGED_ARP_FILTER) {
1199                 __be32 addr = bss_conf->arp_addr_list[0];
1200                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1201
1202                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1203                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1204
1205                 if (ret < 0)
1206                         goto out_sleep;
1207         }
1208
1209         if (changed & BSS_CHANGED_BEACON) {
1210                 beacon = ieee80211_beacon_get(hw, vif);
1211                 if (!beacon)
1212                         goto out_sleep;
1213
1214                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1215                                               beacon->len);
1216
1217                 if (ret < 0) {
1218                         dev_kfree_skb(beacon);
1219                         goto out_sleep;
1220                 }
1221
1222                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1223                                               beacon->len);
1224
1225                 dev_kfree_skb(beacon);
1226
1227                 if (ret < 0)
1228                         goto out_sleep;
1229
1230                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1231                                   wl->beacon_int, wl->dtim_period);
1232
1233                 if (ret < 0)
1234                         goto out_sleep;
1235         }
1236
1237 out_sleep:
1238         wl1251_ps_elp_sleep(wl);
1239
1240 out:
1241         mutex_unlock(&wl->mutex);
1242 }
1243
1244
1245 /* can't be const, mac80211 writes to this */
1246 static struct ieee80211_rate wl1251_rates[] = {
1247         { .bitrate = 10,
1248           .hw_value = 0x1,
1249           .hw_value_short = 0x1, },
1250         { .bitrate = 20,
1251           .hw_value = 0x2,
1252           .hw_value_short = 0x2,
1253           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1254         { .bitrate = 55,
1255           .hw_value = 0x4,
1256           .hw_value_short = 0x4,
1257           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1258         { .bitrate = 110,
1259           .hw_value = 0x20,
1260           .hw_value_short = 0x20,
1261           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1262         { .bitrate = 60,
1263           .hw_value = 0x8,
1264           .hw_value_short = 0x8, },
1265         { .bitrate = 90,
1266           .hw_value = 0x10,
1267           .hw_value_short = 0x10, },
1268         { .bitrate = 120,
1269           .hw_value = 0x40,
1270           .hw_value_short = 0x40, },
1271         { .bitrate = 180,
1272           .hw_value = 0x80,
1273           .hw_value_short = 0x80, },
1274         { .bitrate = 240,
1275           .hw_value = 0x200,
1276           .hw_value_short = 0x200, },
1277         { .bitrate = 360,
1278          .hw_value = 0x400,
1279          .hw_value_short = 0x400, },
1280         { .bitrate = 480,
1281           .hw_value = 0x800,
1282           .hw_value_short = 0x800, },
1283         { .bitrate = 540,
1284           .hw_value = 0x1000,
1285           .hw_value_short = 0x1000, },
1286 };
1287
1288 /* can't be const, mac80211 writes to this */
1289 static struct ieee80211_channel wl1251_channels[] = {
1290         { .hw_value = 1, .center_freq = 2412},
1291         { .hw_value = 2, .center_freq = 2417},
1292         { .hw_value = 3, .center_freq = 2422},
1293         { .hw_value = 4, .center_freq = 2427},
1294         { .hw_value = 5, .center_freq = 2432},
1295         { .hw_value = 6, .center_freq = 2437},
1296         { .hw_value = 7, .center_freq = 2442},
1297         { .hw_value = 8, .center_freq = 2447},
1298         { .hw_value = 9, .center_freq = 2452},
1299         { .hw_value = 10, .center_freq = 2457},
1300         { .hw_value = 11, .center_freq = 2462},
1301         { .hw_value = 12, .center_freq = 2467},
1302         { .hw_value = 13, .center_freq = 2472},
1303 };
1304
1305 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1306                              struct ieee80211_vif *vif, u16 queue,
1307                              const struct ieee80211_tx_queue_params *params)
1308 {
1309         enum wl1251_acx_ps_scheme ps_scheme;
1310         struct wl1251 *wl = hw->priv;
1311         int ret;
1312
1313         mutex_lock(&wl->mutex);
1314
1315         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1316
1317         ret = wl1251_ps_elp_wakeup(wl);
1318         if (ret < 0)
1319                 goto out;
1320
1321         /* mac80211 uses units of 32 usec */
1322         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1323                                 params->cw_min, params->cw_max,
1324                                 params->aifs, params->txop * 32);
1325         if (ret < 0)
1326                 goto out_sleep;
1327
1328         if (params->uapsd)
1329                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1330         else
1331                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1332
1333         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1334                                  CHANNEL_TYPE_EDCF,
1335                                  wl1251_tx_get_queue(queue), ps_scheme,
1336                                  WL1251_ACX_ACK_POLICY_LEGACY);
1337         if (ret < 0)
1338                 goto out_sleep;
1339
1340 out_sleep:
1341         wl1251_ps_elp_sleep(wl);
1342
1343 out:
1344         mutex_unlock(&wl->mutex);
1345
1346         return ret;
1347 }
1348
1349 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1350                                 struct survey_info *survey)
1351 {
1352         struct wl1251 *wl = hw->priv;
1353         struct ieee80211_conf *conf = &hw->conf;
1354
1355         if (idx != 0)
1356                 return -ENOENT;
1357
1358         survey->channel = conf->chandef.chan;
1359         survey->filled = SURVEY_INFO_NOISE_DBM;
1360         survey->noise = wl->noise;
1361
1362         return 0;
1363 }
1364
1365 /* can't be const, mac80211 writes to this */
1366 static struct ieee80211_supported_band wl1251_band_2ghz = {
1367         .channels = wl1251_channels,
1368         .n_channels = ARRAY_SIZE(wl1251_channels),
1369         .bitrates = wl1251_rates,
1370         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1371 };
1372
1373 static const struct ieee80211_ops wl1251_ops = {
1374         .start = wl1251_op_start,
1375         .stop = wl1251_op_stop,
1376         .add_interface = wl1251_op_add_interface,
1377         .remove_interface = wl1251_op_remove_interface,
1378         .config = wl1251_op_config,
1379         .prepare_multicast = wl1251_op_prepare_multicast,
1380         .configure_filter = wl1251_op_configure_filter,
1381         .tx = wl1251_op_tx,
1382         .set_key = wl1251_op_set_key,
1383         .hw_scan = wl1251_op_hw_scan,
1384         .bss_info_changed = wl1251_op_bss_info_changed,
1385         .set_rts_threshold = wl1251_op_set_rts_threshold,
1386         .conf_tx = wl1251_op_conf_tx,
1387         .get_survey = wl1251_op_get_survey,
1388 };
1389
1390 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1391 {
1392         unsigned long timeout;
1393
1394         wl1251_reg_write32(wl, EE_ADDR, offset);
1395         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1396
1397         /* EE_CTL_READ clears when data is ready */
1398         timeout = jiffies + msecs_to_jiffies(100);
1399         while (1) {
1400                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1401                         break;
1402
1403                 if (time_after(jiffies, timeout))
1404                         return -ETIMEDOUT;
1405
1406                 msleep(1);
1407         }
1408
1409         *data = wl1251_reg_read32(wl, EE_DATA);
1410         return 0;
1411 }
1412
1413 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1414                               u8 *data, size_t len)
1415 {
1416         size_t i;
1417         int ret;
1418
1419         wl1251_reg_write32(wl, EE_START, 0);
1420
1421         for (i = 0; i < len; i++) {
1422                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1423                 if (ret < 0)
1424                         return ret;
1425         }
1426
1427         return 0;
1428 }
1429
1430 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1431 {
1432         u8 mac[ETH_ALEN];
1433         int i, ret;
1434
1435         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1436
1437         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1438         if (ret < 0) {
1439                 wl1251_warning("failed to read MAC address from EEPROM");
1440                 return ret;
1441         }
1442
1443         /* MAC is stored in reverse order */
1444         for (i = 0; i < ETH_ALEN; i++)
1445                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1446
1447         return 0;
1448 }
1449
1450 static int wl1251_register_hw(struct wl1251 *wl)
1451 {
1452         int ret;
1453
1454         if (wl->mac80211_registered)
1455                 return 0;
1456
1457         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1458
1459         ret = ieee80211_register_hw(wl->hw);
1460         if (ret < 0) {
1461                 wl1251_error("unable to register mac80211 hw: %d", ret);
1462                 return ret;
1463         }
1464
1465         wl->mac80211_registered = true;
1466
1467         wl1251_notice("loaded");
1468
1469         return 0;
1470 }
1471
1472 int wl1251_init_ieee80211(struct wl1251 *wl)
1473 {
1474         int ret;
1475
1476         /* The tx descriptor buffer and the TKIP space */
1477         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1478                 + WL1251_TKIP_IV_SPACE;
1479
1480         /* unit us */
1481         /* FIXME: find a proper value */
1482
1483         ieee80211_hw_set(wl->hw, SIGNAL_DBM);
1484         ieee80211_hw_set(wl->hw, SUPPORTS_PS);
1485
1486         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1487                                          BIT(NL80211_IFTYPE_ADHOC);
1488         wl->hw->wiphy->max_scan_ssids = 1;
1489         wl->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wl1251_band_2ghz;
1490
1491         wl->hw->queues = 4;
1492
1493         if (wl->use_eeprom)
1494                 wl1251_read_eeprom_mac(wl);
1495
1496         ret = wl1251_register_hw(wl);
1497         if (ret)
1498                 goto out;
1499
1500         wl1251_debugfs_init(wl);
1501         wl1251_notice("initialized");
1502
1503         ret = 0;
1504
1505 out:
1506         return ret;
1507 }
1508 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1509
1510 struct ieee80211_hw *wl1251_alloc_hw(void)
1511 {
1512         struct ieee80211_hw *hw;
1513         struct wl1251 *wl;
1514         int i;
1515         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1516
1517         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1518         if (!hw) {
1519                 wl1251_error("could not alloc ieee80211_hw");
1520                 return ERR_PTR(-ENOMEM);
1521         }
1522
1523         wl = hw->priv;
1524         memset(wl, 0, sizeof(*wl));
1525
1526         wl->hw = hw;
1527
1528         wl->data_in_count = 0;
1529
1530         skb_queue_head_init(&wl->tx_queue);
1531
1532         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1533         wl->channel = WL1251_DEFAULT_CHANNEL;
1534         wl->monitor_present = false;
1535         wl->joined = false;
1536         wl->scanning = false;
1537         wl->bss_type = MAX_BSS_TYPE;
1538         wl->default_key = 0;
1539         wl->listen_int = 1;
1540         wl->rx_counter = 0;
1541         wl->rx_handled = 0;
1542         wl->rx_current_buffer = 0;
1543         wl->rx_last_id = 0;
1544         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1545         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1546         wl->elp = false;
1547         wl->station_mode = STATION_ACTIVE_MODE;
1548         wl->psm_requested = false;
1549         wl->psm_entry_retry = 0;
1550         wl->tx_queue_stopped = false;
1551         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1552         wl->rssi_thold = 0;
1553         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1554         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1555         wl->vif = NULL;
1556
1557         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1558                 wl->tx_frames[i] = NULL;
1559
1560         wl->next_tx_complete = 0;
1561
1562         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1563         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1564
1565         /*
1566          * In case our MAC address is not correctly set,
1567          * we use a random but Nokia MAC.
1568          */
1569         memcpy(wl->mac_addr, nokia_oui, 3);
1570         get_random_bytes(wl->mac_addr + 3, 3);
1571
1572         wl->state = WL1251_STATE_OFF;
1573         mutex_init(&wl->mutex);
1574         spin_lock_init(&wl->wl_lock);
1575
1576         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1577         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1578
1579         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1580         if (!wl->rx_descriptor) {
1581                 wl1251_error("could not allocate memory for rx descriptor");
1582                 ieee80211_free_hw(hw);
1583                 return ERR_PTR(-ENOMEM);
1584         }
1585
1586         return hw;
1587 }
1588 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1589
1590 int wl1251_free_hw(struct wl1251 *wl)
1591 {
1592         ieee80211_unregister_hw(wl->hw);
1593
1594         wl1251_debugfs_exit(wl);
1595
1596         kfree(wl->target_mem_map);
1597         kfree(wl->data_path);
1598         vfree(wl->fw);
1599         wl->fw = NULL;
1600         kfree(wl->nvs);
1601         wl->nvs = NULL;
1602
1603         kfree(wl->rx_descriptor);
1604         wl->rx_descriptor = NULL;
1605
1606         ieee80211_free_hw(wl->hw);
1607
1608         return 0;
1609 }
1610 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1611
1612 MODULE_DESCRIPTION("TI wl1251 Wireless LAN Driver Core");
1613 MODULE_LICENSE("GPL");
1614 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1615 MODULE_FIRMWARE(WL1251_FW_NAME);
1616 MODULE_FIRMWARE(WL1251_NVS_NAME);