drivers/net/wireless/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 100
 217 irqreturn_t wl1251_irq(int irq, void *cookie)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl = cookie;
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 299                         wl1251_event_handle(wl, 0);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 304                         wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 while (skb_queue_len(&wl->tx_queue) > 0
 312                        && wl1251_tx_path_status(wl) == 0) {
 313
 314                         struct sk_buff *skb = skb_dequeue(&wl->tx_queue);
 315                         if (skb == NULL)
 316                                 goto out_sleep;
 317
 318                         ret = wl1251_tx_frame(wl, skb);
 319                         if (ret == -EBUSY) {
 320                                 skb_queue_head(&wl->tx_queue, skb);
 321                                 break;
 322                         } else if (ret < 0) {
 323                                 dev_kfree_skb(skb);
 324                         }
 325                 }
 326
 327                 if (--ctr == 0)
 328                         break;
 329
 330                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 331         } while (intr);
 332
 333 out_sleep:
 334         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 335         wl1251_ps_elp_sleep(wl);
 336
 337 out:
 338         mutex_unlock(&wl->mutex);
 339         return IRQ_HANDLED;
 340 }
 341 EXPORT_SYMBOL_GPL(wl1251_irq);
 342
 343 static void wl1251_irq_work(struct work_struct *work)
 344 {
 345         struct wl1251 *wl =
 346                 container_of(work, struct wl1251, irq_work);
 347
 348         wl1251_irq(0, wl);
 349 }
 350
 351 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 352                        u16 beacon_interval, u8 dtim_period)
 353 {
 354         int ret;
 355
 356         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 357                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 358                                      wl->tx_mgmt_frm_rate,
 359                                      wl->tx_mgmt_frm_mod);
 360         if (ret < 0)
 361                 goto out;
 362
 363         /*
 364          * Join command applies filters, and if we are not associated,
 365          * BSSID filter must be disabled for association to work.
 366          */
 367         if (is_zero_ether_addr(wl->bssid))
 368                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 369
 370         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 371                               dtim_period);
 372         if (ret < 0)
 373                 goto out;
 374
 375         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 376         if (ret < 0)
 377                 wl1251_warning("join timeout");
 378
 379 out:
 380         return ret;
 381 }
 382
 383 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 384 {
 385         struct wl1251 *wl = hw->priv;
 386         unsigned long flags;
 387
 388         skb_queue_tail(&wl->tx_queue, skb);
 389
 390         /*
 391          * The chip specific setup must run before the first TX packet -
 392          * before that, the tx_work will not be initialized!
 393          */
 394
 395         ieee80211_queue_work(wl->hw, &wl->tx_work);
 396
 397         /*
 398          * The workqueue is slow to process the tx_queue and we need stop
 399          * the queue here, otherwise the queue will get too long.
 400          */
 401         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 402                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 403
 404                 spin_lock_irqsave(&wl->wl_lock, flags);
 405                 ieee80211_stop_queues(wl->hw);
 406                 wl->tx_queue_stopped = true;
 407                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 408         }
 409 }
 410
 411 static int wl1251_op_start(struct ieee80211_hw *hw)
 412 {
 413         struct wl1251 *wl = hw->priv;
 414         struct wiphy *wiphy = hw->wiphy;
 415         int ret = 0;
 416
 417         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 418
 419         mutex_lock(&wl->mutex);
 420
 421         if (wl->state != WL1251_STATE_OFF) {
 422                 wl1251_error("cannot start because not in off state: %d",
 423                              wl->state);
 424                 ret = -EBUSY;
 425                 goto out;
 426         }
 427
 428         ret = wl1251_chip_wakeup(wl);
 429         if (ret < 0)
 430                 goto out;
 431
 432         ret = wl1251_boot(wl);
 433         if (ret < 0)
 434                 goto out;
 435
 436         ret = wl1251_hw_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440         ret = wl1251_acx_station_id(wl);
 441         if (ret < 0)
 442                 goto out;
 443
 444         wl->state = WL1251_STATE_ON;
 445
 446         wl1251_info("firmware booted (%s)", wl->fw_ver);
 447
 448         /* update hw/fw version info in wiphy struct */
 449         wiphy->hw_version = wl->chip_id;
 450         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 451
 452 out:
 453         if (ret < 0)
 454                 wl1251_power_off(wl);
 455
 456         mutex_unlock(&wl->mutex);
 457
 458         return ret;
 459 }
 460
 461 static void wl1251_op_stop(struct ieee80211_hw *hw)
 462 {
 463         struct wl1251 *wl = hw->priv;
 464
 465         wl1251_info("down");
 466
 467         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 468
 469         mutex_lock(&wl->mutex);
 470
 471         WARN_ON(wl->state != WL1251_STATE_ON);
 472
 473         if (wl->scanning) {
 474                 ieee80211_scan_completed(wl->hw, true);
 475                 wl->scanning = false;
 476         }
 477
 478         wl->state = WL1251_STATE_OFF;
 479
 480         wl1251_disable_interrupts(wl);
 481
 482         mutex_unlock(&wl->mutex);
 483
 484         cancel_work_sync(&wl->irq_work);
 485         cancel_work_sync(&wl->tx_work);
 486         cancel_delayed_work_sync(&wl->ps_work);
 487         cancel_delayed_work_sync(&wl->elp_work);
 488
 489         mutex_lock(&wl->mutex);
 490
 491         /* let's notify MAC80211 about the remaining pending TX frames */
 492         wl1251_tx_flush(wl);
 493         wl1251_power_off(wl);
 494
 495         memset(wl->bssid, 0, ETH_ALEN);
 496         wl->listen_int = 1;
 497         wl->bss_type = MAX_BSS_TYPE;
 498
 499         wl->data_in_count = 0;
 500         wl->rx_counter = 0;
 501         wl->rx_handled = 0;
 502         wl->rx_current_buffer = 0;
 503         wl->rx_last_id = 0;
 504         wl->next_tx_complete = 0;
 505         wl->elp = false;
 506         wl->station_mode = STATION_ACTIVE_MODE;
 507         wl->tx_queue_stopped = false;
 508         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 509         wl->rssi_thold = 0;
 510         wl->channel = WL1251_DEFAULT_CHANNEL;
 511         wl->monitor_present = false;
 512         wl->joined = false;
 513
 514         wl1251_debugfs_reset(wl);
 515
 516         mutex_unlock(&wl->mutex);
 517 }
 518
 519 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 520                                    struct ieee80211_vif *vif)
 521 {
 522         struct wl1251 *wl = hw->priv;
 523         int ret = 0;
 524
 525         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 526                      vif->type, vif->addr);
 527
 528         mutex_lock(&wl->mutex);
 529         if (wl->vif) {
 530                 ret = -EBUSY;
 531                 goto out;
 532         }
 533
 534         wl->vif = vif;
 535
 536         switch (vif->type) {
 537         case NL80211_IFTYPE_STATION:
 538                 wl->bss_type = BSS_TYPE_STA_BSS;
 539                 break;
 540         case NL80211_IFTYPE_ADHOC:
 541                 wl->bss_type = BSS_TYPE_IBSS;
 542                 break;
 543         default:
 544                 ret = -EOPNOTSUPP;
 545                 goto out;
 546         }
 547
 548         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 549                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 550                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 551                 ret = wl1251_acx_station_id(wl);
 552                 if (ret < 0)
 553                         goto out;
 554         }
 555
 556 out:
 557         mutex_unlock(&wl->mutex);
 558         return ret;
 559 }
 560
 561 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 562                                          struct ieee80211_vif *vif)
 563 {
 564         struct wl1251 *wl = hw->priv;
 565
 566         mutex_lock(&wl->mutex);
 567         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 568         wl->vif = NULL;
 569         memset(wl->bssid, 0, ETH_ALEN);
 570         mutex_unlock(&wl->mutex);
 571 }
 572
 573 static int wl1251_build_null_data(struct wl1251 *wl)
 574 {
 575         struct sk_buff *skb = NULL;
 576         int size;
 577         void *ptr;
 578         int ret = -ENOMEM;
 579
 580
 581         if (wl->bss_type == BSS_TYPE_IBSS) {
 582                 size = sizeof(struct wl12xx_null_data_template);
 583                 ptr = NULL;
 584         } else {
 585                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 586                 if (!skb)
 587                         goto out;
 588                 size = skb->len;
 589                 ptr = skb->data;
 590         }
 591
 592         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 593
 594 out:
 595         dev_kfree_skb(skb);
 596         if (ret)
 597                 wl1251_warning("cmd buld null data failed %d", ret);
 598
 599         return ret;
 600
 601 }
 602
 603 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 604 {
 605         struct ieee80211_qos_hdr template;
 606
 607         memset(&template, 0, sizeof(template));
 608
 609         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 610         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 611         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 612
 613         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 614                                              IEEE80211_STYPE_QOS_NULLFUNC |
 615                                              IEEE80211_FCTL_TODS);
 616
 617         /* FIXME: not sure what priority to use here */
 618         template.qos_ctrl = cpu_to_le16(0);
 619
 620         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 621                                        sizeof(template));
 622 }
 623
 624 static void wl1251_ps_work(struct work_struct *work)
 625 {
 626         struct delayed_work *dwork;
 627         struct wl1251 *wl;
 628         unsigned long diff, wait;
 629         bool need_ps;
 630         bool have_ps;
 631         int ret;
 632         int i;
 633
 634         dwork = container_of(work, struct delayed_work, work);
 635         wl = container_of(dwork, struct wl1251, ps_work);
 636
 637         mutex_lock(&wl->mutex);
 638
 639         /* don't change PS modes while still transitioning, to avoid possbile
 640          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 641         if (wl->ps_transitioning) {
 642                 diff = jiffies - wl->ps_change_jiffies;
 643                 if (diff > msecs_to_jiffies(500)) {
 644                         wl1251_error("PS change taking too long: %lu", diff);
 645                         wl->ps_transitioning = false;
 646                 } else {
 647                         //wl1251_error("PS still transitioning");
 648                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 649                                 msecs_to_jiffies(50));
 650                         goto out;
 651                 }
 652         }
 653
 654         need_ps = wl->psm_requested && !wl->bss_lost;
 655         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 656
 657         if (need_ps == have_ps) {
 658                 //wl1251_info("ps: already in mode %d", have_ps);
 659                 goto out;
 660         }
 661
 662         /* don't enter PS if there was recent activity */
 663         if (need_ps) {
 664                 wait = 0;
 665
 666                 diff = jiffies - wl->last_io_jiffies;
 667                 if (diff < msecs_to_jiffies(150)) {
 668                         //wl1251_info("ps: postponed psm, j %ld", diff);
 669                         wait = msecs_to_jiffies(150) - diff + 1;
 670                 }
 671
 672                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 673                         if (wl->tx_frames[i] != NULL) {
 674                                 //wl1251_error("  frm %d busy", i);
 675                                 if (wait < msecs_to_jiffies(50))
 676                                         wait = msecs_to_jiffies(50);
 677                                 break;
 678                         }
 679                 }
 680
 681                 if (wait > 0) {
 682                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 683                         goto out;
 684                 }
 685         }
 686
 687         ret = wl1251_ps_elp_wakeup(wl);
 688         if (ret < 0)
 689                 goto out;
 690
 691         if (need_ps) {
 692                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 693                                             wl->dtim_period);
 694         }
 695         ret = wl1251_ps_set_mode(wl,
 696                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 697         if (ret < 0)
 698                 goto out_sleep;
 699
 700         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
 701         //      jiffies - wl->last_io_jiffies);
 702
 703 out_sleep:
 704         wl1251_ps_elp_sleep(wl);
 705
 706 out:
 707         mutex_unlock(&wl->mutex);
 708 }
 709
 710 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 711 {
 712         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 713 }
 714
 715 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 716 {
 717         struct wl1251 *wl = hw->priv;
 718         struct ieee80211_conf *conf = &hw->conf;
 719         int channel, ret = 0;
 720
 721         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 722
 723         wl1251_debug(DEBUG_MAC80211,
 724                      "mac80211 config ch %d monitor %s psm %s power %d",
 725                      channel,
 726                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 727                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 728                      conf->power_level);
 729
 730         mutex_lock(&wl->mutex);
 731
 732         ret = wl1251_ps_elp_wakeup(wl);
 733         if (ret < 0)
 734                 goto out;
 735
 736         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 737                 u32 mode;
 738
 739                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 740                         wl->monitor_present = true;
 741                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 742                 } else {
 743                         wl->monitor_present = false;
 744                         mode = 0;
 745                 }
 746
 747                 ret = wl1251_acx_feature_cfg(wl, mode);
 748                 if (ret < 0)
 749                         goto out_sleep;
 750         }
 751
 752         if (channel != wl->channel) {
 753                 wl->channel = channel;
 754
 755                 /*
 756                  * Use ENABLE_RX command for channel switching when no
 757                  * interface is present (monitor mode only).
 758                  * This leaves the tx path disabled in firmware, whereas
 759                  * the usual JOIN command seems to transmit some frames
 760                  * at firmware level.
 761                  *
 762                  * Note that bss_type must be BSS_TYPE_STA_BSS, also at least
 763                  * one join has to be performed before CMD_ENABLE_RX can
 764                  * properly switch channels (join will be done by CONF_IDLE).
 765                  */
 766                 if (wl->vif == NULL) {
 767                         wl->bss_type = BSS_TYPE_STA_BSS;
 768                         wl->joined = false;
 769                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 770                 } else {
 771                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 772                                           wl->beacon_int, wl->dtim_period);
 773                 }
 774                 if (ret < 0)
 775                         goto out_sleep;
 776         }
 777
 778         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 779                 wl1251_debug(DEBUG_PSM, "psm enabled");
 780
 781                 wl->psm_requested = true;
 782
 783                 wl->dtim_period = conf->ps_dtim_period;
 784
 785                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 786         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 787                 wl1251_debug(DEBUG_PSM, "psm disabled");
 788
 789                 wl->psm_requested = false;
 790
 791                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 792         }
 793
 794         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 795                 if (conf->flags & IEEE80211_CONF_IDLE) {
 796                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 797                         if (ret < 0)
 798                                 goto out_sleep;
 799                 } else {
 800                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 801                         if (ret < 0)
 802                                 goto out_sleep;
 803
 804                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 805                         if (ret < 0)
 806                                 wl1251_error("error waiting for wakeup");
 807
 808                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 809                                           wl->beacon_int, wl->dtim_period);
 810                         if (ret < 0)
 811                                 goto out_sleep;
 812                 }
 813         }
 814
 815         if (conf->power_level != wl->power_level) {
 816                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 817                 if (ret < 0)
 818                         goto out_sleep;
 819
 820                 wl->power_level = conf->power_level;
 821         }
 822
 823 out_sleep:
 824         wl1251_ps_elp_sleep(wl);
 825
 826 out:
 827         mutex_unlock(&wl->mutex);
 828
 829         return ret;
 830 }
 831
 832 struct wl1251_filter_params {
 833         bool enabled;
 834         int mc_list_length;
 835         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 836 };
 837
 838 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 839                                        struct netdev_hw_addr_list *mc_list)
 840 {
 841         struct wl1251_filter_params *fp;
 842         struct netdev_hw_addr *ha;
 843         struct wl1251 *wl = hw->priv;
 844
 845         if (unlikely(wl->state == WL1251_STATE_OFF))
 846                 return 0;
 847
 848         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 849         if (!fp) {
 850                 wl1251_error("Out of memory setting filters.");
 851                 return 0;
 852         }
 853
 854         /* update multicast filtering parameters */
 855         fp->mc_list_length = 0;
 856         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 857                 fp->enabled = false;
 858         } else {
 859                 fp->enabled = true;
 860                 netdev_hw_addr_list_for_each(ha, mc_list) {
 861                         memcpy(fp->mc_list[fp->mc_list_length],
 862                                         ha->addr, ETH_ALEN);
 863                         fp->mc_list_length++;
 864                 }
 865         }
 866
 867         return (u64)(unsigned long)fp;
 868 }
 869
 870 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 871                                   FIF_ALLMULTI | \
 872                                   FIF_FCSFAIL | \
 873                                   FIF_BCN_PRBRESP_PROMISC | \
 874                                   FIF_CONTROL | \
 875                                   FIF_OTHER_BSS | \
 876                                   FIF_PROBE_REQ)
 877
 878 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 879                                        unsigned int changed,
 880                                        unsigned int *total, u64 multicast)
 881 {
 882         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 883         struct wl1251 *wl = hw->priv;
 884         int ret;
 885
 886         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 887
 888         *total &= WL1251_SUPPORTED_FILTERS;
 889         changed &= WL1251_SUPPORTED_FILTERS;
 890
 891         if (changed == 0) {
 892                 /* no filters which we support changed */
 893                 kfree(fp);
 894                 return;
 895         }
 896
 897         mutex_lock(&wl->mutex);
 898
 899         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 900         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 901
 902         if (*total & FIF_PROMISC_IN_BSS) {
 903                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 904                 wl->rx_config |= CFG_RX_ALL_GOOD;
 905         }
 906         if (*total & FIF_ALLMULTI)
 907                 /*
 908                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 909                  * all multicast frames
 910                  */
 911                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 912         if (*total & FIF_FCSFAIL)
 913                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 914         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 915                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 916                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 917         }
 918         if (*total & FIF_CONTROL)
 919                 wl->rx_filter |= CFG_RX_CTL_EN;
 920         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 921                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 922         if (*total & FIF_PROBE_REQ)
 923                 wl->rx_filter |= CFG_RX_PREQ_EN;
 924
 925         if (wl->state == WL1251_STATE_OFF)
 926                 goto out;
 927
 928         ret = wl1251_ps_elp_wakeup(wl);
 929         if (ret < 0)
 930                 goto out;
 931
 932         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 933                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 934         else if (fp)
 935                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 936                                                    fp->mc_list,
 937                                                    fp->mc_list_length);
 938         if (ret < 0)
 939                 goto out;
 940
 941         /* send filters to firmware */
 942         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 943
 944         wl1251_ps_elp_sleep(wl);
 945
 946 out:
 947         mutex_unlock(&wl->mutex);
 948         kfree(fp);
 949 }
 950
 951 /* HW encryption */
 952 static int wl1251_set_key_type(struct wl1251 *wl,
 953                                struct wl1251_cmd_set_keys *key,
 954                                enum set_key_cmd cmd,
 955                                struct ieee80211_key_conf *mac80211_key,
 956                                const u8 *addr)
 957 {
 958         switch (mac80211_key->cipher) {
 959         case WLAN_CIPHER_SUITE_WEP40:
 960         case WLAN_CIPHER_SUITE_WEP104:
 961                 if (is_broadcast_ether_addr(addr))
 962                         key->key_type = KEY_WEP_DEFAULT;
 963                 else
 964                         key->key_type = KEY_WEP_ADDR;
 965
 966                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 967                 break;
 968         case WLAN_CIPHER_SUITE_TKIP:
 969                 if (is_broadcast_ether_addr(addr))
 970                         key->key_type = KEY_TKIP_MIC_GROUP;
 971                 else
 972                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 973
 974                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 975                 break;
 976         case WLAN_CIPHER_SUITE_CCMP:
 977                 if (is_broadcast_ether_addr(addr))
 978                         key->key_type = KEY_AES_GROUP;
 979                 else
 980                         key->key_type = KEY_AES_PAIRWISE;
 981                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 982                 break;
 983         default:
 984                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 985                 return -EOPNOTSUPP;
 986         }
 987
 988         return 0;
 989 }
 990
 991 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 992                              struct ieee80211_vif *vif,
 993                              struct ieee80211_sta *sta,
 994                              struct ieee80211_key_conf *key)
 995 {
 996         struct wl1251 *wl = hw->priv;
 997         struct wl1251_cmd_set_keys *wl_cmd;
 998         const u8 *addr;
 999         int ret;
1000
1001         static const u8 bcast_addr[ETH_ALEN] =
1002                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
1003
1004         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
1005
1006         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
1007         if (!wl_cmd) {
1008                 ret = -ENOMEM;
1009                 goto out;
1010         }
1011
1012         addr = sta ? sta->addr : bcast_addr;
1013
1014         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
1015         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
1016         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
1017                      key->cipher, key->keyidx, key->keylen, key->flags);
1018         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
1019
1020         if (is_zero_ether_addr(addr)) {
1021                 /* We dont support TX only encryption */
1022                 ret = -EOPNOTSUPP;
1023                 goto out;
1024         }
1025
1026         mutex_lock(&wl->mutex);
1027
1028         switch (cmd) {
1029         case SET_KEY:
1030                 if (wl->monitor_present) {
1031                         ret = -EOPNOTSUPP;
1032                         goto out_unlock;
1033                 }
1034                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
1035                 break;
1036         case DISABLE_KEY:
1037                 wl_cmd->key_action = KEY_REMOVE;
1038                 break;
1039         default:
1040                 wl1251_error("Unsupported key cmd 0x%x", cmd);
1041                 break;
1042         }
1043
1044         ret = wl1251_ps_elp_wakeup(wl);
1045         if (ret < 0)
1046                 goto out_unlock;
1047
1048         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1049         if (ret < 0) {
1050                 wl1251_error("Set KEY type failed");
1051                 goto out_sleep;
1052         }
1053
1054         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1055                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1056
1057         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1058             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1059                 /*
1060                  * We get the key in the following form:
1061                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1062                  * but the target is expecting:
1063                  * TKIP - RX MIC - TX MIC
1064                  */
1065                 memcpy(wl_cmd->key, key->key, 16);
1066                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1067                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1068
1069         } else {
1070                 memcpy(wl_cmd->key, key->key, key->keylen);
1071         }
1072         wl_cmd->key_size = key->keylen;
1073
1074         wl_cmd->id = key->keyidx;
1075         wl_cmd->ssid_profile = 0;
1076
1077         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1078
1079         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1080         if (ret < 0) {
1081                 wl1251_warning("could not set keys");
1082                 goto out_sleep;
1083         }
1084
1085 out_sleep:
1086         wl1251_ps_elp_sleep(wl);
1087
1088 out_unlock:
1089         mutex_unlock(&wl->mutex);
1090
1091 out:
1092         kfree(wl_cmd);
1093
1094         return ret;
1095 }
1096
1097 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1098                              struct ieee80211_vif *vif,
1099                              struct cfg80211_scan_request *req)
1100 {
1101         struct wl1251 *wl = hw->priv;
1102         struct sk_buff *skb;
1103         size_t ssid_len = 0;
1104         u8 *ssid = NULL;
1105         int ret;
1106
1107         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1108
1109         if (req->n_ssids) {
1110                 ssid = req->ssids[0].ssid;
1111                 ssid_len = req->ssids[0].ssid_len;
1112         }
1113
1114         mutex_lock(&wl->mutex);
1115
1116         if (wl->scanning) {
1117                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1118                 ret = -EINVAL;
1119                 goto out;
1120         }
1121
1122         ret = wl1251_ps_elp_wakeup(wl);
1123         if (ret < 0)
1124                 goto out;
1125
1126         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1127                                      req->ie, req->ie_len);
1128         if (!skb) {
1129                 ret = -ENOMEM;
1130                 goto out;
1131         }
1132
1133         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1134                                       skb->len);
1135         dev_kfree_skb(skb);
1136         if (ret < 0)
1137                 goto out_sleep;
1138
1139         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1140         if (ret < 0)
1141                 goto out_sleep;
1142
1143         wl->scanning = true;
1144
1145         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1146                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1147         if (ret < 0) {
1148                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1149                 wl->scanning = false;
1150                 goto out_sleep;
1151         }
1152
1153 out_sleep:
1154         wl1251_ps_elp_sleep(wl);
1155
1156 out:
1157         mutex_unlock(&wl->mutex);
1158
1159         return ret;
1160 }
1161
1162 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1163 {
1164         struct wl1251 *wl = hw->priv;
1165         int ret;
1166
1167         mutex_lock(&wl->mutex);
1168
1169         ret = wl1251_ps_elp_wakeup(wl);
1170         if (ret < 0)
1171                 goto out;
1172
1173         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1174         if (ret < 0)
1175                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1176
1177         wl1251_ps_elp_sleep(wl);
1178
1179 out:
1180         mutex_unlock(&wl->mutex);
1181
1182         return ret;
1183 }
1184
1185 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1186                                        struct ieee80211_vif *vif,
1187                                        struct ieee80211_bss_conf *bss_conf,
1188                                        u32 changed)
1189 {
1190         struct wl1251 *wl = hw->priv;
1191         struct sk_buff *beacon, *skb;
1192         bool do_join = false;
1193         bool enable;
1194         int ret;
1195
1196         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1197
1198         mutex_lock(&wl->mutex);
1199
1200         ret = wl1251_ps_elp_wakeup(wl);
1201         if (ret < 0)
1202                 goto out;
1203
1204         if (changed & BSS_CHANGED_CQM) {
1205                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1206                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1207                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1208                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1209                 if (ret < 0)
1210                         goto out;
1211                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1212         }
1213
1214         if ((changed & BSS_CHANGED_BSSID) &&
1215             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1216                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1217
1218                 if (!is_zero_ether_addr(wl->bssid)) {
1219                         ret = wl1251_build_null_data(wl);
1220                         if (ret < 0)
1221                                 goto out_sleep;
1222
1223                         ret = wl1251_build_qos_null_data(wl);
1224                         if (ret < 0)
1225                                 goto out_sleep;
1226
1227                         do_join = true;
1228                 }
1229         }
1230
1231         if (changed & BSS_CHANGED_ASSOC) {
1232                 if (bss_conf->assoc) {
1233                         wl->beacon_int = bss_conf->beacon_int;
1234
1235                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1236                         if (!skb)
1237                                 goto out_sleep;
1238
1239                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1240                                                       skb->data,
1241                                                       skb->len);
1242                         dev_kfree_skb(skb);
1243                         if (ret < 0)
1244                                 goto out_sleep;
1245
1246                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1247                         if (ret < 0)
1248                                 goto out_sleep;
1249                 } else {
1250                         /* use defaults when not associated */
1251                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1252                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1253                 }
1254         }
1255         if (changed & BSS_CHANGED_ERP_SLOT) {
1256                 if (bss_conf->use_short_slot)
1257                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1258                 else
1259                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1260                 if (ret < 0) {
1261                         wl1251_warning("Set slot time failed %d", ret);
1262                         goto out_sleep;
1263                 }
1264         }
1265
1266         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1267                 if (bss_conf->use_short_preamble)
1268                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1269                 else
1270                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1271         }
1272
1273         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1274                 if (bss_conf->use_cts_prot)
1275                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1276                 else
1277                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1278                 if (ret < 0) {
1279                         wl1251_warning("Set ctsprotect failed %d", ret);
1280                         goto out_sleep;
1281                 }
1282         }
1283
1284         if (changed & BSS_CHANGED_ARP_FILTER) {
1285                 __be32 addr = bss_conf->arp_addr_list[0];
1286                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1287
1288                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1289                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1290
1291                 if (ret < 0)
1292                         goto out_sleep;
1293         }
1294
1295         if (changed & BSS_CHANGED_BEACON) {
1296                 beacon = ieee80211_beacon_get(hw, vif);
1297                 if (!beacon)
1298                         goto out_sleep;
1299
1300                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1301                                               beacon->len);
1302
1303                 if (ret < 0) {
1304                         dev_kfree_skb(beacon);
1305                         goto out_sleep;
1306                 }
1307
1308                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1309                                               beacon->len);
1310
1311                 dev_kfree_skb(beacon);
1312
1313                 if (ret < 0)
1314                         goto out_sleep;
1315
1316                 do_join = true;
1317         }
1318
1319         if (do_join) {
1320                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1321                                   wl->beacon_int, wl->dtim_period);
1322                 if (ret < 0)
1323                         goto out_sleep;
1324         }
1325
1326 out_sleep:
1327         wl1251_ps_elp_sleep(wl);
1328
1329 out:
1330         mutex_unlock(&wl->mutex);
1331 }
1332
1333
1334 /* can't be const, mac80211 writes to this */
1335 static struct ieee80211_rate wl1251_rates[] = {
1336         { .bitrate = 10,
1337           .hw_value = 0x1,
1338           .hw_value_short = 0x1, },
1339         { .bitrate = 20,
1340           .hw_value = 0x2,
1341           .hw_value_short = 0x2,
1342           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1343         { .bitrate = 55,
1344           .hw_value = 0x4,
1345           .hw_value_short = 0x4,
1346           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1347         { .bitrate = 110,
1348           .hw_value = 0x20,
1349           .hw_value_short = 0x20,
1350           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1351         { .bitrate = 60,
1352           .hw_value = 0x8,
1353           .hw_value_short = 0x8, },
1354         { .bitrate = 90,
1355           .hw_value = 0x10,
1356           .hw_value_short = 0x10, },
1357         { .bitrate = 120,
1358           .hw_value = 0x40,
1359           .hw_value_short = 0x40, },
1360         { .bitrate = 180,
1361           .hw_value = 0x80,
1362           .hw_value_short = 0x80, },
1363         { .bitrate = 240,
1364           .hw_value = 0x200,
1365           .hw_value_short = 0x200, },
1366         { .bitrate = 360,
1367          .hw_value = 0x400,
1368          .hw_value_short = 0x400, },
1369         { .bitrate = 480,
1370           .hw_value = 0x800,
1371           .hw_value_short = 0x800, },
1372         { .bitrate = 540,
1373           .hw_value = 0x1000,
1374           .hw_value_short = 0x1000, },
1375 };
1376
1377 /* can't be const, mac80211 writes to this */
1378 static struct ieee80211_channel wl1251_channels[] = {
1379         { .hw_value = 1, .center_freq = 2412},
1380         { .hw_value = 2, .center_freq = 2417},
1381         { .hw_value = 3, .center_freq = 2422},
1382         { .hw_value = 4, .center_freq = 2427},
1383         { .hw_value = 5, .center_freq = 2432},
1384         { .hw_value = 6, .center_freq = 2437},
1385         { .hw_value = 7, .center_freq = 2442},
1386         { .hw_value = 8, .center_freq = 2447},
1387         { .hw_value = 9, .center_freq = 2452},
1388         { .hw_value = 10, .center_freq = 2457},
1389         { .hw_value = 11, .center_freq = 2462},
1390         { .hw_value = 12, .center_freq = 2467},
1391         { .hw_value = 13, .center_freq = 2472},
1392 };
1393
1394 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1395                              struct ieee80211_vif *vif, u16 queue,
1396                              const struct ieee80211_tx_queue_params *params)
1397 {
1398         enum wl1251_acx_ps_scheme ps_scheme;
1399         struct wl1251 *wl = hw->priv;
1400         int ret;
1401
1402         mutex_lock(&wl->mutex);
1403
1404         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1405
1406         ret = wl1251_ps_elp_wakeup(wl);
1407         if (ret < 0)
1408                 goto out;
1409
1410         /* mac80211 uses units of 32 usec */
1411         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1412                                 params->cw_min, params->cw_max,
1413                                 params->aifs, params->txop * 32);
1414         if (ret < 0)
1415                 goto out_sleep;
1416
1417         if (params->uapsd)
1418                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1419         else
1420                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1421
1422         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1423                                  CHANNEL_TYPE_EDCF,
1424                                  wl1251_tx_get_queue(queue), ps_scheme,
1425                                  WL1251_ACX_ACK_POLICY_LEGACY);
1426         if (ret < 0)
1427                 goto out_sleep;
1428
1429 out_sleep:
1430         wl1251_ps_elp_sleep(wl);
1431
1432 out:
1433         mutex_unlock(&wl->mutex);
1434
1435         return ret;
1436 }
1437
1438 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1439                                 struct survey_info *survey)
1440 {
1441         struct wl1251 *wl = hw->priv;
1442         struct ieee80211_conf *conf = &hw->conf;
1443
1444         if (idx != 0)
1445                 return -ENOENT;
1446
1447         survey->channel = conf->channel;
1448         survey->filled = SURVEY_INFO_NOISE_DBM;
1449         survey->noise = wl->noise;
1450
1451         return 0;
1452 }
1453
1454 /* can't be const, mac80211 writes to this */
1455 static struct ieee80211_supported_band wl1251_band_2ghz = {
1456         .channels = wl1251_channels,
1457         .n_channels = ARRAY_SIZE(wl1251_channels),
1458         .bitrates = wl1251_rates,
1459         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1460 };
1461
1462 static const struct ieee80211_ops wl1251_ops = {
1463         .start = wl1251_op_start,
1464         .stop = wl1251_op_stop,
1465         .add_interface = wl1251_op_add_interface,
1466         .remove_interface = wl1251_op_remove_interface,
1467         .config = wl1251_op_config,
1468         .prepare_multicast = wl1251_op_prepare_multicast,
1469         .configure_filter = wl1251_op_configure_filter,
1470         .tx = wl1251_op_tx,
1471         .set_key = wl1251_op_set_key,
1472         .hw_scan = wl1251_op_hw_scan,
1473         .bss_info_changed = wl1251_op_bss_info_changed,
1474         .set_rts_threshold = wl1251_op_set_rts_threshold,
1475         .conf_tx = wl1251_op_conf_tx,
1476         .get_survey = wl1251_op_get_survey,
1477 };
1478
1479 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1480 {
1481         unsigned long timeout;
1482
1483         wl1251_reg_write32(wl, EE_ADDR, offset);
1484         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1485
1486         /* EE_CTL_READ clears when data is ready */
1487         timeout = jiffies + msecs_to_jiffies(100);
1488         while (1) {
1489                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1490                         break;
1491
1492                 if (time_after(jiffies, timeout))
1493                         return -ETIMEDOUT;
1494
1495                 msleep(1);
1496         }
1497
1498         *data = wl1251_reg_read32(wl, EE_DATA);
1499         return 0;
1500 }
1501
1502 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1503                               u8 *data, size_t len)
1504 {
1505         size_t i;
1506         int ret;
1507
1508         wl1251_reg_write32(wl, EE_START, 0);
1509
1510         for (i = 0; i < len; i++) {
1511                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1512                 if (ret < 0)
1513                         return ret;
1514         }
1515
1516         return 0;
1517 }
1518
1519 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1520 {
1521         u8 mac[ETH_ALEN];
1522         int i, ret;
1523
1524         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1525
1526         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1527         if (ret < 0) {
1528                 wl1251_warning("failed to read MAC address from EEPROM");
1529                 return ret;
1530         }
1531
1532         /* MAC is stored in reverse order */
1533         for (i = 0; i < ETH_ALEN; i++)
1534                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1535
1536         return 0;
1537 }
1538
1539 /* temporary (?) hack for EEPROM dumping
1540  * (it seems this can only be done before fw is running) */
1541 static int wl1251_dump_eeprom(struct wl1251 *wl)
1542 {
1543         int ret;
1544
1545         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1546
1547         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1548         if (wl->eeprom_dump == NULL) {
1549                 ret = -ENOMEM;
1550                 goto out;
1551         }
1552
1553         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1554         if (ret != 0) {
1555                 wl1251_error("eeprom dump failed: %d", ret);
1556                 kfree(wl->eeprom_dump);
1557                 wl->eeprom_dump = NULL;
1558                 goto out;
1559         }
1560
1561         wl1251_info("eeprom dumped.");
1562
1563 out:
1564         return ret;
1565 }
1566
1567 static int wl1251_register_hw(struct wl1251 *wl)
1568 {
1569         int ret;
1570
1571         if (wl->mac80211_registered)
1572                 return 0;
1573
1574         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1575
1576         ret = ieee80211_register_hw(wl->hw);
1577         if (ret < 0) {
1578                 wl1251_error("unable to register mac80211 hw: %d", ret);
1579                 return ret;
1580         }
1581
1582         wl->mac80211_registered = true;
1583
1584         wl1251_notice("loaded");
1585
1586         return 0;
1587 }
1588
1589 int wl1251_init_ieee80211(struct wl1251 *wl)
1590 {
1591         int ret;
1592
1593         /* The tx descriptor buffer and the TKIP space */
1594         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1595                 + WL1251_TKIP_IV_SPACE;
1596
1597         /* unit us */
1598         /* FIXME: find a proper value */
1599         wl->hw->channel_change_time = 10000;
1600
1601         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1602                 IEEE80211_HW_SUPPORTS_PS |
1603                 IEEE80211_HW_BEACON_FILTER |
1604                 IEEE80211_HW_SUPPORTS_UAPSD |
1605                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1606
1607         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1608                                          BIT(NL80211_IFTYPE_ADHOC);
1609         wl->hw->wiphy->max_scan_ssids = 1;
1610         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1611
1612         wl->hw->queues = 4;
1613
1614         if (wl->use_eeprom)
1615                 wl1251_read_eeprom_mac(wl);
1616         if (wl->dump_eeprom)
1617                 wl1251_dump_eeprom(wl);
1618
1619         ret = wl1251_register_hw(wl);
1620         if (ret)
1621                 goto out;
1622
1623         wl1251_debugfs_init(wl);
1624         wl1251_notice("initialized");
1625
1626         ret = 0;
1627
1628 out:
1629         return ret;
1630 }
1631 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1632
1633 struct ieee80211_hw *wl1251_alloc_hw(void)
1634 {
1635         struct ieee80211_hw *hw;
1636         struct wl1251 *wl;
1637         int i;
1638         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1639
1640         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1641         if (!hw) {
1642                 wl1251_error("could not alloc ieee80211_hw");
1643                 return ERR_PTR(-ENOMEM);
1644         }
1645
1646         wl = hw->priv;
1647         memset(wl, 0, sizeof(*wl));
1648
1649         wl->hw = hw;
1650
1651         wl->data_in_count = 0;
1652
1653         skb_queue_head_init(&wl->tx_queue);
1654
1655         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1656         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1657         wl->channel = WL1251_DEFAULT_CHANNEL;
1658         wl->monitor_present = false;
1659         wl->joined = false;
1660         wl->scanning = false;
1661         wl->bss_type = MAX_BSS_TYPE;
1662         wl->default_key = 0;
1663         wl->listen_int = 1;
1664         wl->rx_counter = 0;
1665         wl->rx_handled = 0;
1666         wl->rx_current_buffer = 0;
1667         wl->rx_last_id = 0;
1668         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1669         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1670         wl->elp = false;
1671         wl->station_mode = STATION_ACTIVE_MODE;
1672         wl->psm_requested = false;
1673         wl->tx_queue_stopped = false;
1674         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1675         wl->rssi_thold = 0;
1676         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1677         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1678         wl->vif = NULL;
1679
1680         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1681                 wl->tx_frames[i] = NULL;
1682
1683         wl->next_tx_complete = 0;
1684
1685         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1686         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1687
1688         /*
1689          * In case our MAC address is not correctly set,
1690          * we use a random but Nokia MAC.
1691          */
1692         memcpy(wl->mac_addr, nokia_oui, 3);
1693         get_random_bytes(wl->mac_addr + 3, 3);
1694
1695         wl->state = WL1251_STATE_OFF;
1696         mutex_init(&wl->mutex);
1697
1698         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1699         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1700
1701         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1702         if (!wl->rx_descriptor) {
1703                 wl1251_error("could not allocate memory for rx descriptor");
1704                 ieee80211_free_hw(hw);
1705                 return ERR_PTR(-ENOMEM);
1706         }
1707
1708         return hw;
1709 }
1710 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1711
1712 int wl1251_free_hw(struct wl1251 *wl)
1713 {
1714         ieee80211_unregister_hw(wl->hw);
1715
1716         wl1251_debugfs_exit(wl);
1717
1718         kfree(wl->target_mem_map);
1719         kfree(wl->data_path);
1720         vfree(wl->fw);
1721         wl->fw = NULL;
1722         kfree(wl->nvs);
1723         wl->nvs = NULL;
1724
1725         kfree(wl->rx_descriptor);
1726         wl->rx_descriptor = NULL;
1727
1728         ieee80211_free_hw(wl->hw);
1729
1730         if (wl->eeprom_dump != NULL)
1731                 kfree(wl->eeprom_dump);
1732
1733         return 0;
1734 }
1735 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1736
1737 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1738 MODULE_LICENSE("GPL");
1739 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1740 MODULE_FIRMWARE(WL1251_FW_NAME);