drivers/net/wireless/zd1211rw/zd_mac.c

   1 /* zd_mac.c
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  16  */
  17
  18 #include <linux/netdevice.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/wireless.h>
  21 #include <linux/usb.h>
  22 #include <linux/jiffies.h>
  23 #include <net/ieee80211_radiotap.h>
  24
  25 #include "zd_def.h"
  26 #include "zd_chip.h"
  27 #include "zd_mac.h"
  28 #include "zd_ieee80211.h"
  29 #include "zd_netdev.h"
  30 #include "zd_rf.h"
  31 #include "zd_util.h"
  32
  33 static void ieee_init(struct ieee80211_device *ieee);
  34 static void softmac_init(struct ieee80211softmac_device *sm);
  35 static void set_rts_cts_work(struct work_struct *work);
  36 static void set_basic_rates_work(struct work_struct *work);
  37
  38 static void housekeeping_init(struct zd_mac *mac);
  39 static void housekeeping_enable(struct zd_mac *mac);
  40 static void housekeeping_disable(struct zd_mac *mac);
  41
  42 static void set_multicast_hash_handler(struct work_struct *work);
  43
  44 static void do_rx(unsigned long mac_ptr);
  45
  46 int zd_mac_init(struct zd_mac *mac,
  47                 struct net_device *netdev,
  48                 struct usb_interface *intf)
  49 {
  50         struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
  51
  52         memset(mac, 0, sizeof(*mac));
  53         spin_lock_init(&mac->lock);
  54         mac->netdev = netdev;
  55         INIT_DELAYED_WORK(&mac->set_rts_cts_work, set_rts_cts_work);
  56         INIT_DELAYED_WORK(&mac->set_basic_rates_work, set_basic_rates_work);
  57
  58         skb_queue_head_init(&mac->rx_queue);
  59         tasklet_init(&mac->rx_tasklet, do_rx, (unsigned long)mac);
  60         tasklet_disable(&mac->rx_tasklet);
  61
  62         ieee_init(ieee);
  63         softmac_init(ieee80211_priv(netdev));
  64         zd_chip_init(&mac->chip, netdev, intf);
  65         housekeeping_init(mac);
  66         INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler);
  67         return 0;
  68 }
  69
  70 static int reset_channel(struct zd_mac *mac)
  71 {
  72         int r;
  73         unsigned long flags;
  74         const struct channel_range *range;
  75
  76         spin_lock_irqsave(&mac->lock, flags);
  77         range = zd_channel_range(mac->regdomain);
  78         if (!range->start) {
  79                 r = -EINVAL;
  80                 goto out;
  81         }
  82         mac->requested_channel = range->start;
  83         r = 0;
  84 out:
  85         spin_unlock_irqrestore(&mac->lock, flags);
  86         return r;
  87 }
  88
  89 int zd_mac_init_hw(struct zd_mac *mac, u8 device_type)
  90 {
  91         int r;
  92         struct zd_chip *chip = &mac->chip;
  93         u8 addr[ETH_ALEN];
  94         u8 default_regdomain;
  95
  96         r = zd_chip_enable_int(chip);
  97         if (r)
  98                 goto out;
  99         r = zd_chip_init_hw(chip, device_type);
 100         if (r)
 101                 goto disable_int;
 102
 103         zd_get_e2p_mac_addr(chip, addr);
 104         r = zd_write_mac_addr(chip, addr);
 105         if (r)
 106                 goto disable_int;
 107         ZD_ASSERT(!irqs_disabled());
 108         spin_lock_irq(&mac->lock);
 109         memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
 110         spin_unlock_irq(&mac->lock);
 111
 112         r = zd_read_regdomain(chip, &default_regdomain);
 113         if (r)
 114                 goto disable_int;
 115         if (!zd_regdomain_supported(default_regdomain)) {
 116                 dev_dbg_f(zd_mac_dev(mac),
 117                           "Regulatory Domain %#04x is not supported.\n",
 118                           default_regdomain);
 119                 r = -EINVAL;
 120                 goto disable_int;
 121         }
 122         spin_lock_irq(&mac->lock);
 123         mac->regdomain = mac->default_regdomain = default_regdomain;
 124         spin_unlock_irq(&mac->lock);
 125         r = reset_channel(mac);
 126         if (r)
 127                 goto disable_int;
 128
 129         /* We must inform the device that we are doing encryption/decryption in
 130          * software at the moment. */
 131         r = zd_set_encryption_type(chip, ENC_SNIFFER);
 132         if (r)
 133                 goto disable_int;
 134
 135         r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
 136         if (r)
 137                 goto disable_int;
 138
 139         r = 0;
 140 disable_int:
 141         zd_chip_disable_int(chip);
 142 out:
 143         return r;
 144 }
 145
 146 void zd_mac_clear(struct zd_mac *mac)
 147 {
 148         flush_workqueue(zd_workqueue);
 149         skb_queue_purge(&mac->rx_queue);
 150         tasklet_kill(&mac->rx_tasklet);
 151         zd_chip_clear(&mac->chip);
 152         ZD_ASSERT(!spin_is_locked(&mac->lock));
 153         ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
 154 }
 155
 156 static int reset_mode(struct zd_mac *mac)
 157 {
 158         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 159         u32 filter = (ieee->iw_mode == IW_MODE_MONITOR) ? ~0 : STA_RX_FILTER;
 160         return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter);
 161 }
 162
 163 int zd_mac_open(struct net_device *netdev)
 164 {
 165         struct zd_mac *mac = zd_netdev_mac(netdev);
 166         struct zd_chip *chip = &mac->chip;
 167         int r;
 168
 169         tasklet_enable(&mac->rx_tasklet);
 170
 171         r = zd_chip_enable_int(chip);
 172         if (r < 0)
 173                 goto out;
 174
 175         r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
 176         if (r < 0)
 177                 goto disable_int;
 178         r = reset_mode(mac);
 179         if (r)
 180                 goto disable_int;
 181         r = zd_chip_switch_radio_on(chip);
 182         if (r < 0)
 183                 goto disable_int;
 184         r = zd_chip_set_channel(chip, mac->requested_channel);
 185         if (r < 0)
 186                 goto disable_radio;
 187         r = zd_chip_enable_rx(chip);
 188         if (r < 0)
 189                 goto disable_radio;
 190         r = zd_chip_enable_hwint(chip);
 191         if (r < 0)
 192                 goto disable_rx;
 193
 194         housekeeping_enable(mac);
 195         ieee80211softmac_start(netdev);
 196         return 0;
 197 disable_rx:
 198         zd_chip_disable_rx(chip);
 199 disable_radio:
 200         zd_chip_switch_radio_off(chip);
 201 disable_int:
 202         zd_chip_disable_int(chip);
 203 out:
 204         return r;
 205 }
 206
 207 int zd_mac_stop(struct net_device *netdev)
 208 {
 209         struct zd_mac *mac = zd_netdev_mac(netdev);
 210         struct zd_chip *chip = &mac->chip;
 211
 212         netif_stop_queue(netdev);
 213
 214         /*
 215          * The order here deliberately is a little different from the open()
 216          * method, since we need to make sure there is no opportunity for RX
 217          * frames to be processed by softmac after we have stopped it.
 218          */
 219
 220         zd_chip_disable_rx(chip);
 221         skb_queue_purge(&mac->rx_queue);
 222         tasklet_disable(&mac->rx_tasklet);
 223         housekeeping_disable(mac);
 224         ieee80211softmac_stop(netdev);
 225
 226         /* Ensure no work items are running or queued from this point */
 227         cancel_delayed_work(&mac->set_rts_cts_work);
 228         cancel_delayed_work(&mac->set_basic_rates_work);
 229         flush_workqueue(zd_workqueue);
 230         mac->updating_rts_rate = 0;
 231         mac->updating_basic_rates = 0;
 232
 233         zd_chip_disable_hwint(chip);
 234         zd_chip_switch_radio_off(chip);
 235         zd_chip_disable_int(chip);
 236
 237         return 0;
 238 }
 239
 240 int zd_mac_set_mac_address(struct net_device *netdev, void *p)
 241 {
 242         int r;
 243         unsigned long flags;
 244         struct sockaddr *addr = p;
 245         struct zd_mac *mac = zd_netdev_mac(netdev);
 246         struct zd_chip *chip = &mac->chip;
 247
 248         if (!is_valid_ether_addr(addr->sa_data))
 249                 return -EADDRNOTAVAIL;
 250
 251         dev_dbg_f(zd_mac_dev(mac),
 252                   "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data));
 253
 254         r = zd_write_mac_addr(chip, addr->sa_data);
 255         if (r)
 256                 return r;
 257
 258         spin_lock_irqsave(&mac->lock, flags);
 259         memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
 260         spin_unlock_irqrestore(&mac->lock, flags);
 261
 262         return 0;
 263 }
 264
 265 static void set_multicast_hash_handler(struct work_struct *work)
 266 {
 267         struct zd_mac *mac = container_of(work, struct zd_mac,
 268                                           set_multicast_hash_work);
 269         struct zd_mc_hash hash;
 270
 271         spin_lock_irq(&mac->lock);
 272         hash = mac->multicast_hash;
 273         spin_unlock_irq(&mac->lock);
 274
 275         zd_chip_set_multicast_hash(&mac->chip, &hash);
 276 }
 277
 278 void zd_mac_set_multicast_list(struct net_device *dev)
 279 {
 280         struct zd_mc_hash hash;
 281         struct zd_mac *mac = zd_netdev_mac(dev);
 282         struct dev_mc_list *mc;
 283         unsigned long flags;
 284
 285         if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
 286                 zd_mc_add_all(&hash);
 287         } else {
 288                 zd_mc_clear(&hash);
 289                 for (mc = dev->mc_list; mc; mc = mc->next) {
 290                         dev_dbg_f(zd_mac_dev(mac), "mc addr " MAC_FMT "\n",
 291                                   MAC_ARG(mc->dmi_addr));
 292                         zd_mc_add_addr(&hash, mc->dmi_addr);
 293                 }
 294         }
 295
 296         spin_lock_irqsave(&mac->lock, flags);
 297         mac->multicast_hash = hash;
 298         spin_unlock_irqrestore(&mac->lock, flags);
 299         queue_work(zd_workqueue, &mac->set_multicast_hash_work);
 300 }
 301
 302 int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
 303 {
 304         int r;
 305         u8 channel;
 306
 307         ZD_ASSERT(!irqs_disabled());
 308         spin_lock_irq(&mac->lock);
 309         if (regdomain == 0) {
 310                 regdomain = mac->default_regdomain;
 311         }
 312         if (!zd_regdomain_supported(regdomain)) {
 313                 spin_unlock_irq(&mac->lock);
 314                 return -EINVAL;
 315         }
 316         mac->regdomain = regdomain;
 317         channel = mac->requested_channel;
 318         spin_unlock_irq(&mac->lock);
 319
 320         r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
 321         if (r)
 322                 return r;
 323         if (!zd_regdomain_supports_channel(regdomain, channel)) {
 324                 r = reset_channel(mac);
 325                 if (r)
 326                         return r;
 327         }
 328
 329         return 0;
 330 }
 331
 332 u8 zd_mac_get_regdomain(struct zd_mac *mac)
 333 {
 334         unsigned long flags;
 335         u8 regdomain;
 336
 337         spin_lock_irqsave(&mac->lock, flags);
 338         regdomain = mac->regdomain;
 339         spin_unlock_irqrestore(&mac->lock, flags);
 340         return regdomain;
 341 }
 342
 343 /* Fallback to lowest rate, if rate is unknown. */
 344 static u8 rate_to_zd_rate(u8 rate)
 345 {
 346         switch (rate) {
 347         case IEEE80211_CCK_RATE_2MB:
 348                 return ZD_CCK_RATE_2M;
 349         case IEEE80211_CCK_RATE_5MB:
 350                 return ZD_CCK_RATE_5_5M;
 351         case IEEE80211_CCK_RATE_11MB:
 352                 return ZD_CCK_RATE_11M;
 353         case IEEE80211_OFDM_RATE_6MB:
 354                 return ZD_OFDM_RATE_6M;
 355         case IEEE80211_OFDM_RATE_9MB:
 356                 return ZD_OFDM_RATE_9M;
 357         case IEEE80211_OFDM_RATE_12MB:
 358                 return ZD_OFDM_RATE_12M;
 359         case IEEE80211_OFDM_RATE_18MB:
 360                 return ZD_OFDM_RATE_18M;
 361         case IEEE80211_OFDM_RATE_24MB:
 362                 return ZD_OFDM_RATE_24M;
 363         case IEEE80211_OFDM_RATE_36MB:
 364                 return ZD_OFDM_RATE_36M;
 365         case IEEE80211_OFDM_RATE_48MB:
 366                 return ZD_OFDM_RATE_48M;
 367         case IEEE80211_OFDM_RATE_54MB:
 368                 return ZD_OFDM_RATE_54M;
 369         }
 370         return ZD_CCK_RATE_1M;
 371 }
 372
 373 static u16 rate_to_cr_rate(u8 rate)
 374 {
 375         switch (rate) {
 376         case IEEE80211_CCK_RATE_2MB:
 377                 return CR_RATE_1M;
 378         case IEEE80211_CCK_RATE_5MB:
 379                 return CR_RATE_5_5M;
 380         case IEEE80211_CCK_RATE_11MB:
 381                 return CR_RATE_11M;
 382         case IEEE80211_OFDM_RATE_6MB:
 383                 return CR_RATE_6M;
 384         case IEEE80211_OFDM_RATE_9MB:
 385                 return CR_RATE_9M;
 386         case IEEE80211_OFDM_RATE_12MB:
 387                 return CR_RATE_12M;
 388         case IEEE80211_OFDM_RATE_18MB:
 389                 return CR_RATE_18M;
 390         case IEEE80211_OFDM_RATE_24MB:
 391                 return CR_RATE_24M;
 392         case IEEE80211_OFDM_RATE_36MB:
 393                 return CR_RATE_36M;
 394         case IEEE80211_OFDM_RATE_48MB:
 395                 return CR_RATE_48M;
 396         case IEEE80211_OFDM_RATE_54MB:
 397                 return CR_RATE_54M;
 398         }
 399         return CR_RATE_1M;
 400 }
 401
 402 static void try_enable_tx(struct zd_mac *mac)
 403 {
 404         unsigned long flags;
 405
 406         spin_lock_irqsave(&mac->lock, flags);
 407         if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
 408                 netif_wake_queue(mac->netdev);
 409         spin_unlock_irqrestore(&mac->lock, flags);
 410 }
 411
 412 static void set_rts_cts_work(struct work_struct *work)
 413 {
 414         struct zd_mac *mac =
 415                 container_of(work, struct zd_mac, set_rts_cts_work.work);
 416         unsigned long flags;
 417         u8 rts_rate;
 418         unsigned int short_preamble;
 419
 420         mutex_lock(&mac->chip.mutex);
 421
 422         spin_lock_irqsave(&mac->lock, flags);
 423         mac->updating_rts_rate = 0;
 424         rts_rate = mac->rts_rate;
 425         short_preamble = mac->short_preamble;
 426         spin_unlock_irqrestore(&mac->lock, flags);
 427
 428         zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
 429         mutex_unlock(&mac->chip.mutex);
 430
 431         try_enable_tx(mac);
 432 }
 433
 434 static void set_basic_rates_work(struct work_struct *work)
 435 {
 436         struct zd_mac *mac =
 437                 container_of(work, struct zd_mac, set_basic_rates_work.work);
 438         unsigned long flags;
 439         u16 basic_rates;
 440
 441         mutex_lock(&mac->chip.mutex);
 442
 443         spin_lock_irqsave(&mac->lock, flags);
 444         mac->updating_basic_rates = 0;
 445         basic_rates = mac->basic_rates;
 446         spin_unlock_irqrestore(&mac->lock, flags);
 447
 448         zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
 449         mutex_unlock(&mac->chip.mutex);
 450
 451         try_enable_tx(mac);
 452 }
 453
 454 static void bssinfo_change(struct net_device *netdev, u32 changes)
 455 {
 456         struct zd_mac *mac = zd_netdev_mac(netdev);
 457         struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
 458         struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
 459         int need_set_rts_cts = 0;
 460         int need_set_rates = 0;
 461         u16 basic_rates;
 462         unsigned long flags;
 463
 464         dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
 465
 466         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
 467                 spin_lock_irqsave(&mac->lock, flags);
 468                 mac->short_preamble = bssinfo->short_preamble;
 469                 spin_unlock_irqrestore(&mac->lock, flags);
 470                 need_set_rts_cts = 1;
 471         }
 472
 473         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
 474                 /* Set RTS rate to highest available basic rate */
 475                 u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac,
 476                         &bssinfo->supported_rates, 1);
 477                 hi_rate = rate_to_zd_rate(hi_rate);
 478
 479                 spin_lock_irqsave(&mac->lock, flags);
 480                 if (hi_rate != mac->rts_rate) {
 481                         mac->rts_rate = hi_rate;
 482                         need_set_rts_cts = 1;
 483                 }
 484                 spin_unlock_irqrestore(&mac->lock, flags);
 485
 486                 /* Set basic rates */
 487                 need_set_rates = 1;
 488                 if (bssinfo->supported_rates.count == 0) {
 489                         /* Allow the device to be flexible */
 490                         basic_rates = CR_RATES_80211B | CR_RATES_80211G;
 491                 } else {
 492                         int i = 0;
 493                         basic_rates = 0;
 494
 495                         for (i = 0; i < bssinfo->supported_rates.count; i++) {
 496                                 u16 rate = bssinfo->supported_rates.rates[i];
 497                                 if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
 498                                         continue;
 499
 500                                 rate &= ~IEEE80211_BASIC_RATE_MASK;
 501                                 basic_rates |= rate_to_cr_rate(rate);
 502                         }
 503                 }
 504                 spin_lock_irqsave(&mac->lock, flags);
 505                 mac->basic_rates = basic_rates;
 506                 spin_unlock_irqrestore(&mac->lock, flags);
 507         }
 508
 509         /* Schedule any changes we made above */
 510
 511         spin_lock_irqsave(&mac->lock, flags);
 512         if (need_set_rts_cts && !mac->updating_rts_rate) {
 513                 mac->updating_rts_rate = 1;
 514                 netif_stop_queue(mac->netdev);
 515                 queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0);
 516         }
 517         if (need_set_rates && !mac->updating_basic_rates) {
 518                 mac->updating_basic_rates = 1;
 519                 netif_stop_queue(mac->netdev);
 520                 queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work,
 521                                    0);
 522         }
 523         spin_unlock_irqrestore(&mac->lock, flags);
 524 }
 525
 526 static void set_channel(struct net_device *netdev, u8 channel)
 527 {
 528         struct zd_mac *mac = zd_netdev_mac(netdev);
 529
 530         dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
 531
 532         zd_chip_set_channel(&mac->chip, channel);
 533 }
 534
 535 int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
 536 {
 537         unsigned long lock_flags;
 538         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 539
 540         if (ieee->iw_mode == IW_MODE_INFRA)
 541                 return -EPERM;
 542
 543         spin_lock_irqsave(&mac->lock, lock_flags);
 544         if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
 545                 spin_unlock_irqrestore(&mac->lock, lock_flags);
 546                 return -EINVAL;
 547         }
 548         mac->requested_channel = channel;
 549         spin_unlock_irqrestore(&mac->lock, lock_flags);
 550         if (netif_running(mac->netdev))
 551                 return zd_chip_set_channel(&mac->chip, channel);
 552         else
 553                 return 0;
 554 }
 555
 556 u8 zd_mac_get_channel(struct zd_mac *mac)
 557 {
 558         u8 channel = zd_chip_get_channel(&mac->chip);
 559
 560         dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel);
 561         return channel;
 562 }
 563
 564 /* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
 565 static u8 zd_rate_typed(u8 zd_rate)
 566 {
 567         static const u8 typed_rates[16] = {
 568                 [ZD_CCK_RATE_1M]        = ZD_CS_CCK|ZD_CCK_RATE_1M,
 569                 [ZD_CCK_RATE_2M]        = ZD_CS_CCK|ZD_CCK_RATE_2M,
 570                 [ZD_CCK_RATE_5_5M]      = ZD_CS_CCK|ZD_CCK_RATE_5_5M,
 571                 [ZD_CCK_RATE_11M]       = ZD_CS_CCK|ZD_CCK_RATE_11M,
 572                 [ZD_OFDM_RATE_6M]       = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
 573                 [ZD_OFDM_RATE_9M]       = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
 574                 [ZD_OFDM_RATE_12M]      = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
 575                 [ZD_OFDM_RATE_18M]      = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
 576                 [ZD_OFDM_RATE_24M]      = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
 577                 [ZD_OFDM_RATE_36M]      = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
 578                 [ZD_OFDM_RATE_48M]      = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
 579                 [ZD_OFDM_RATE_54M]      = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
 580         };
 581
 582         ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
 583         return typed_rates[zd_rate & ZD_CS_RATE_MASK];
 584 }
 585
 586 int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
 587 {
 588         struct ieee80211_device *ieee;
 589
 590         switch (mode) {
 591         case IW_MODE_AUTO:
 592         case IW_MODE_ADHOC:
 593         case IW_MODE_INFRA:
 594                 mac->netdev->type = ARPHRD_ETHER;
 595                 break;
 596         case IW_MODE_MONITOR:
 597                 mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
 598                 break;
 599         default:
 600                 dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
 601                 return -EINVAL;
 602         }
 603
 604         ieee = zd_mac_to_ieee80211(mac);
 605         ZD_ASSERT(!irqs_disabled());
 606         spin_lock_irq(&ieee->lock);
 607         ieee->iw_mode = mode;
 608         spin_unlock_irq(&ieee->lock);
 609
 610         if (netif_running(mac->netdev))
 611                 return reset_mode(mac);
 612
 613         return 0;
 614 }
 615
 616 int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
 617 {
 618         unsigned long flags;
 619         struct ieee80211_device *ieee;
 620
 621         ieee = zd_mac_to_ieee80211(mac);
 622         spin_lock_irqsave(&ieee->lock, flags);
 623         *mode = ieee->iw_mode;
 624         spin_unlock_irqrestore(&ieee->lock, flags);
 625         return 0;
 626 }
 627
 628 int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
 629 {
 630         int i;
 631         const struct channel_range *channel_range;
 632         u8 regdomain;
 633
 634         memset(range, 0, sizeof(*range));
 635
 636         /* FIXME: Not so important and depends on the mode. For 802.11g
 637          * usually this value is used. It seems to be that Bit/s number is
 638          * given here.
 639          */
 640         range->throughput = 27 * 1000 * 1000;
 641
 642         range->max_qual.qual = 100;
 643         range->max_qual.level = 100;
 644
 645         /* FIXME: Needs still to be tuned. */
 646         range->avg_qual.qual = 71;
 647         range->avg_qual.level = 80;
 648
 649         /* FIXME: depends on standard? */
 650         range->min_rts = 256;
 651         range->max_rts = 2346;
 652
 653         range->min_frag = MIN_FRAG_THRESHOLD;
 654         range->max_frag = MAX_FRAG_THRESHOLD;
 655
 656         range->max_encoding_tokens = WEP_KEYS;
 657         range->num_encoding_sizes = 2;
 658         range->encoding_size[0] = 5;
 659         range->encoding_size[1] = WEP_KEY_LEN;
 660
 661         range->we_version_compiled = WIRELESS_EXT;
 662         range->we_version_source = 20;
 663
 664         range->enc_capa = IW_ENC_CAPA_WPA |  IW_ENC_CAPA_WPA2 |
 665                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
 666
 667         ZD_ASSERT(!irqs_disabled());
 668         spin_lock_irq(&mac->lock);
 669         regdomain = mac->regdomain;
 670         spin_unlock_irq(&mac->lock);
 671         channel_range = zd_channel_range(regdomain);
 672
 673         range->num_channels = channel_range->end - channel_range->start;
 674         range->old_num_channels = range->num_channels;
 675         range->num_frequency = range->num_channels;
 676         range->old_num_frequency = range->num_frequency;
 677
 678         for (i = 0; i < range->num_frequency; i++) {
 679                 struct iw_freq *freq = &range->freq[i];
 680                 freq->i = channel_range->start + i;
 681                 zd_channel_to_freq(freq, freq->i);
 682         }
 683
 684         return 0;
 685 }
 686
 687 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
 688 {
 689         static const u8 rate_divisor[] = {
 690                 [ZD_CCK_RATE_1M]        =  1,
 691                 [ZD_CCK_RATE_2M]        =  2,
 692                 [ZD_CCK_RATE_5_5M]      = 11, /* bits must be doubled */
 693                 [ZD_CCK_RATE_11M]       = 11,
 694                 [ZD_OFDM_RATE_6M]       =  6,
 695                 [ZD_OFDM_RATE_9M]       =  9,
 696                 [ZD_OFDM_RATE_12M]      = 12,
 697                 [ZD_OFDM_RATE_18M]      = 18,
 698                 [ZD_OFDM_RATE_24M]      = 24,
 699                 [ZD_OFDM_RATE_36M]      = 36,
 700                 [ZD_OFDM_RATE_48M]      = 48,
 701                 [ZD_OFDM_RATE_54M]      = 54,
 702         };
 703
 704         u32 bits = (u32)tx_length * 8;
 705         u32 divisor;
 706
 707         divisor = rate_divisor[zd_rate];
 708         if (divisor == 0)
 709                 return -EINVAL;
 710
 711         switch (zd_rate) {
 712         case ZD_CCK_RATE_5_5M:
 713                 bits = (2*bits) + 10; /* round up to the next integer */
 714                 break;
 715         case ZD_CCK_RATE_11M:
 716                 if (service) {
 717                         u32 t = bits % 11;
 718                         *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
 719                         if (0 < t && t <= 3) {
 720                                 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
 721                         }
 722                 }
 723                 bits += 10; /* round up to the next integer */
 724                 break;
 725         }
 726
 727         return bits/divisor;
 728 }
 729
 730 enum {
 731         R2M_SHORT_PREAMBLE = 0x01,
 732         R2M_11A            = 0x02,
 733 };
 734
 735 static u8 zd_rate_to_modulation(u8 zd_rate, int flags)
 736 {
 737         u8 modulation;
 738
 739         modulation = zd_rate_typed(zd_rate);
 740         if (flags & R2M_SHORT_PREAMBLE) {
 741                 switch (ZD_CS_RATE(modulation)) {
 742                 case ZD_CCK_RATE_2M:
 743                 case ZD_CCK_RATE_5_5M:
 744                 case ZD_CCK_RATE_11M:
 745                         modulation |= ZD_CS_CCK_PREA_SHORT;
 746                         return modulation;
 747                 }
 748         }
 749         if (flags & R2M_11A) {
 750                 if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM)
 751                         modulation |= ZD_CS_OFDM_MODE_11A;
 752         }
 753         return modulation;
 754 }
 755
 756 static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
 757                               struct ieee80211_hdr_4addr *hdr)
 758 {
 759         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
 760         u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
 761         u8 rate, zd_rate;
 762         int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
 763         int is_multicast = is_multicast_ether_addr(hdr->addr1);
 764         int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
 765                 is_multicast, is_mgt);
 766         int flags = 0;
 767
 768         /* FIXME: 802.11a? */
 769         rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
 770
 771         if (short_preamble)
 772                 flags |= R2M_SHORT_PREAMBLE;
 773
 774         zd_rate = rate_to_zd_rate(rate);
 775         cs->modulation = zd_rate_to_modulation(zd_rate, flags);
 776 }
 777
 778 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
 779                            struct ieee80211_hdr_4addr *header)
 780 {
 781         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
 782         unsigned int tx_length = le16_to_cpu(cs->tx_length);
 783         u16 fctl = le16_to_cpu(header->frame_ctl);
 784         u16 ftype = WLAN_FC_GET_TYPE(fctl);
 785         u16 stype = WLAN_FC_GET_STYPE(fctl);
 786
 787         /*
 788          * CONTROL TODO:
 789          * - if backoff needed, enable bit 0
 790          * - if burst (backoff not needed) disable bit 0
 791          */
 792
 793         cs->control = 0;
 794
 795         /* First fragment */
 796         if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0)
 797                 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
 798
 799         /* Multicast */
 800         if (is_multicast_ether_addr(header->addr1))
 801                 cs->control |= ZD_CS_MULTICAST;
 802
 803         /* PS-POLL */
 804         if (stype == IEEE80211_STYPE_PSPOLL)
 805                 cs->control |= ZD_CS_PS_POLL_FRAME;
 806
 807         /* Unicast data frames over the threshold should have RTS */
 808         if (!is_multicast_ether_addr(header->addr1) &&
 809                 ftype != IEEE80211_FTYPE_MGMT &&
 810                     tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
 811                 cs->control |= ZD_CS_RTS;
 812
 813         /* Use CTS-to-self protection if required */
 814         if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM &&
 815                         ieee80211softmac_protection_needed(softmac)) {
 816                 /* FIXME: avoid sending RTS *and* self-CTS, is that correct? */
 817                 cs->control &= ~ZD_CS_RTS;
 818                 cs->control |= ZD_CS_SELF_CTS;
 819         }
 820
 821         /* FIXME: Management frame? */
 822 }
 823
 824 static int fill_ctrlset(struct zd_mac *mac,
 825                         struct ieee80211_txb *txb,
 826                         int frag_num)
 827 {
 828         int r;
 829         struct sk_buff *skb = txb->fragments[frag_num];
 830         struct ieee80211_hdr_4addr *hdr =
 831                 (struct ieee80211_hdr_4addr *) skb->data;
 832         unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
 833         unsigned int next_frag_len;
 834         unsigned int packet_length;
 835         struct zd_ctrlset *cs = (struct zd_ctrlset *)
 836                 skb_push(skb, sizeof(struct zd_ctrlset));
 837
 838         if (frag_num+1  < txb->nr_frags) {
 839                 next_frag_len = txb->fragments[frag_num+1]->len +
 840                                 IEEE80211_FCS_LEN;
 841         } else {
 842                 next_frag_len = 0;
 843         }
 844         ZD_ASSERT(frag_len <= 0xffff);
 845         ZD_ASSERT(next_frag_len <= 0xffff);
 846
 847         cs_set_modulation(mac, cs, hdr);
 848
 849         cs->tx_length = cpu_to_le16(frag_len);
 850
 851         cs_set_control(mac, cs, hdr);
 852
 853         packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
 854         ZD_ASSERT(packet_length <= 0xffff);
 855         /* ZD1211B: Computing the length difference this way, gives us
 856          * flexibility to compute the packet length.
 857          */
 858         cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ?
 859                         packet_length - frag_len : packet_length);
 860
 861         /*
 862          * CURRENT LENGTH:
 863          * - transmit frame length in microseconds
 864          * - seems to be derived from frame length
 865          * - see Cal_Us_Service() in zdinlinef.h
 866          * - if macp->bTxBurstEnable is enabled, then multiply by 4
 867          *  - bTxBurstEnable is never set in the vendor driver
 868          *
 869          * SERVICE:
 870          * - "for PLCP configuration"
 871          * - always 0 except in some situations at 802.11b 11M
 872          * - see line 53 of zdinlinef.h
 873          */
 874         cs->service = 0;
 875         r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
 876                                  le16_to_cpu(cs->tx_length));
 877         if (r < 0)
 878                 return r;
 879         cs->current_length = cpu_to_le16(r);
 880
 881         if (next_frag_len == 0) {
 882                 cs->next_frame_length = 0;
 883         } else {
 884                 r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
 885                                          next_frag_len);
 886                 if (r < 0)
 887                         return r;
 888                 cs->next_frame_length = cpu_to_le16(r);
 889         }
 890
 891         return 0;
 892 }
 893
 894 static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
 895 {
 896         int i, r;
 897         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 898
 899         for (i = 0; i < txb->nr_frags; i++) {
 900                 struct sk_buff *skb = txb->fragments[i];
 901
 902                 r = fill_ctrlset(mac, txb, i);
 903                 if (r) {
 904                         ieee->stats.tx_dropped++;
 905                         return r;
 906                 }
 907                 r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
 908                 if (r) {
 909                         ieee->stats.tx_dropped++;
 910                         return r;
 911                 }
 912         }
 913
 914         /* FIXME: shouldn't this be handled by the upper layers? */
 915         mac->netdev->trans_start = jiffies;
 916
 917         ieee80211_txb_free(txb);
 918         return 0;
 919 }
 920
 921 struct zd_rt_hdr {
 922         struct ieee80211_radiotap_header rt_hdr;
 923         u8  rt_flags;
 924         u8  rt_rate;
 925         u16 rt_channel;
 926         u16 rt_chbitmask;
 927 } __attribute__((packed));
 928
 929 static void fill_rt_header(void *buffer, struct zd_mac *mac,
 930                            const struct ieee80211_rx_stats *stats,
 931                            const struct rx_status *status)
 932 {
 933         struct zd_rt_hdr *hdr = buffer;
 934
 935         hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 936         hdr->rt_hdr.it_pad = 0;
 937         hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
 938         hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 939                                  (1 << IEEE80211_RADIOTAP_CHANNEL) |
 940                                  (1 << IEEE80211_RADIOTAP_RATE));
 941
 942         hdr->rt_flags = 0;
 943         if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
 944                 hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
 945
 946         hdr->rt_rate = stats->rate / 5;
 947
 948         /* FIXME: 802.11a */
 949         hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
 950                                              _zd_chip_get_channel(&mac->chip)));
 951         hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
 952                 ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
 953                 ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
 954 }
 955
 956 /* Returns 1 if the data packet is for us and 0 otherwise. */
 957 static int is_data_packet_for_us(struct ieee80211_device *ieee,
 958                                  struct ieee80211_hdr_4addr *hdr)
 959 {
 960         struct net_device *netdev = ieee->dev;
 961         u16 fc = le16_to_cpu(hdr->frame_ctl);
 962
 963         ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
 964
 965         switch (ieee->iw_mode) {
 966         case IW_MODE_ADHOC:
 967                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
 968                     compare_ether_addr(hdr->addr3, ieee->bssid) != 0)
 969                         return 0;
 970                 break;
 971         case IW_MODE_AUTO:
 972         case IW_MODE_INFRA:
 973                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
 974                     IEEE80211_FCTL_FROMDS ||
 975                     compare_ether_addr(hdr->addr2, ieee->bssid) != 0)
 976                         return 0;
 977                 break;
 978         default:
 979                 ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
 980                 return 0;
 981         }
 982
 983         return compare_ether_addr(hdr->addr1, netdev->dev_addr) == 0 ||
 984                (is_multicast_ether_addr(hdr->addr1) &&
 985                 compare_ether_addr(hdr->addr3, netdev->dev_addr) != 0) ||
 986                (netdev->flags & IFF_PROMISC);
 987 }
 988
 989 /* Filters received packets. The function returns 1 if the packet should be
 990  * forwarded to ieee80211_rx(). If the packet should be ignored the function
 991  * returns 0. If an invalid packet is found the function returns -EINVAL.
 992  *
 993  * The function calls ieee80211_rx_mgt() directly.
 994  *
 995  * It has been based on ieee80211_rx_any.
 996  */
 997 static int filter_rx(struct ieee80211_device *ieee,
 998                      const u8 *buffer, unsigned int length,
 999                      struct ieee80211_rx_stats *stats)
1000 {
1001         struct ieee80211_hdr_4addr *hdr;
1002         u16 fc;
1003
1004         if (ieee->iw_mode == IW_MODE_MONITOR)
1005                 return 1;
1006
1007         hdr = (struct ieee80211_hdr_4addr *)buffer;
1008         fc = le16_to_cpu(hdr->frame_ctl);
1009         if ((fc & IEEE80211_FCTL_VERS) != 0)
1010                 return -EINVAL;
1011
1012         switch (WLAN_FC_GET_TYPE(fc)) {
1013         case IEEE80211_FTYPE_MGMT:
1014                 if (length < sizeof(struct ieee80211_hdr_3addr))
1015                         return -EINVAL;
1016                 ieee80211_rx_mgt(ieee, hdr, stats);
1017                 return 0;
1018         case IEEE80211_FTYPE_CTL:
1019                 return 0;
1020         case IEEE80211_FTYPE_DATA:
1021                 /* Ignore invalid short buffers */
1022                 if (length < sizeof(struct ieee80211_hdr_3addr))
1023                         return -EINVAL;
1024                 return is_data_packet_for_us(ieee, hdr);
1025         }
1026
1027         return -EINVAL;
1028 }
1029
1030 static void update_qual_rssi(struct zd_mac *mac,
1031                              const u8 *buffer, unsigned int length,
1032                              u8 qual_percent, u8 rssi_percent)
1033 {
1034         unsigned long flags;
1035         struct ieee80211_hdr_3addr *hdr;
1036         int i;
1037
1038         hdr = (struct ieee80211_hdr_3addr *)buffer;
1039         if (length < offsetof(struct ieee80211_hdr_3addr, addr3))
1040                 return;
1041         if (compare_ether_addr(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid) != 0)
1042                 return;
1043
1044         spin_lock_irqsave(&mac->lock, flags);
1045         i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE;
1046         mac->qual_buffer[i] = qual_percent;
1047         mac->rssi_buffer[i] = rssi_percent;
1048         mac->stats_count++;
1049         spin_unlock_irqrestore(&mac->lock, flags);
1050 }
1051
1052 static int fill_rx_stats(struct ieee80211_rx_stats *stats,
1053                          const struct rx_status **pstatus,
1054                          struct zd_mac *mac,
1055                          const u8 *buffer, unsigned int length)
1056 {
1057         const struct rx_status *status;
1058
1059         *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status));
1060         if (status->frame_status & ZD_RX_ERROR) {
1061                 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1062                 ieee->stats.rx_errors++;
1063                 if (status->frame_status & ZD_RX_TIMEOUT_ERROR)
1064                         ieee->stats.rx_missed_errors++;
1065                 else if (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR)
1066                         ieee->stats.rx_fifo_errors++;
1067                 else if (status->frame_status & ZD_RX_DECRYPTION_ERROR)
1068                         ieee->ieee_stats.rx_discards_undecryptable++;
1069                 else if (status->frame_status & ZD_RX_CRC32_ERROR) {
1070                         ieee->stats.rx_crc_errors++;
1071                         ieee->ieee_stats.rx_fcs_errors++;
1072                 }
1073                 else if (status->frame_status & ZD_RX_CRC16_ERROR)
1074                         ieee->stats.rx_crc_errors++;
1075                 return -EINVAL;
1076         }
1077
1078         memset(stats, 0, sizeof(struct ieee80211_rx_stats));
1079         stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
1080                                + sizeof(struct rx_status));
1081         /* FIXME: 802.11a */
1082         stats->freq = IEEE80211_24GHZ_BAND;
1083         stats->received_channel = _zd_chip_get_channel(&mac->chip);
1084         stats->rssi = zd_rx_strength_percent(status->signal_strength);
1085         stats->signal = zd_rx_qual_percent(buffer,
1086                                           length - sizeof(struct rx_status),
1087                                           status);
1088         stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
1089         stats->rate = zd_rx_rate(buffer, status);
1090         if (stats->rate)
1091                 stats->mask |= IEEE80211_STATMASK_RATE;
1092
1093         return 0;
1094 }
1095
1096 static void zd_mac_rx(struct zd_mac *mac, struct sk_buff *skb)
1097 {
1098         int r;
1099         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1100         struct ieee80211_rx_stats stats;
1101         const struct rx_status *status;
1102
1103         if (skb->len < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
1104                        IEEE80211_FCS_LEN + sizeof(struct rx_status))
1105         {
1106                 ieee->stats.rx_errors++;
1107                 ieee->stats.rx_length_errors++;
1108                 goto free_skb;
1109         }
1110
1111         r = fill_rx_stats(&stats, &status, mac, skb->data, skb->len);
1112         if (r) {
1113                 /* Only packets with rx errors are included here.
1114                  * The error stats have already been set in fill_rx_stats.
1115                  */
1116                 goto free_skb;
1117         }
1118
1119         __skb_pull(skb, ZD_PLCP_HEADER_SIZE);
1120         __skb_trim(skb, skb->len -
1121                         (IEEE80211_FCS_LEN + sizeof(struct rx_status)));
1122
1123         update_qual_rssi(mac, skb->data, skb->len, stats.signal,
1124                          status->signal_strength);
1125
1126         r = filter_rx(ieee, skb->data, skb->len, &stats);
1127         if (r <= 0) {
1128                 if (r < 0) {
1129                         ieee->stats.rx_errors++;
1130                         dev_dbg_f(zd_mac_dev(mac), "Error in packet.\n");
1131                 }
1132                 goto free_skb;
1133         }
1134
1135         if (ieee->iw_mode == IW_MODE_MONITOR)
1136                 fill_rt_header(skb_push(skb, sizeof(struct zd_rt_hdr)), mac,
1137                                &stats, status);
1138
1139         r = ieee80211_rx(ieee, skb, &stats);
1140         if (r)
1141                 return;
1142 free_skb:
1143         /* We are always in a soft irq. */
1144         dev_kfree_skb(skb);
1145 }
1146
1147 static void do_rx(unsigned long mac_ptr)
1148 {
1149         struct zd_mac *mac = (struct zd_mac *)mac_ptr;
1150         struct sk_buff *skb;
1151
1152         while ((skb = skb_dequeue(&mac->rx_queue)) != NULL)
1153                 zd_mac_rx(mac, skb);
1154 }
1155
1156 int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length)
1157 {
1158         struct sk_buff *skb;
1159
1160         skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
1161         if (!skb) {
1162                 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1163                 dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n");
1164                 ieee->stats.rx_dropped++;
1165                 return -ENOMEM;
1166         }
1167         skb_reserve(skb, sizeof(struct zd_rt_hdr));
1168         memcpy(__skb_put(skb, length), buffer, length);
1169         skb_queue_tail(&mac->rx_queue, skb);
1170         tasklet_schedule(&mac->rx_tasklet);
1171         return 0;
1172 }
1173
1174 static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
1175                      int pri)
1176 {
1177         return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
1178 }
1179
1180 static void set_security(struct net_device *netdev,
1181                          struct ieee80211_security *sec)
1182 {
1183         struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
1184         struct ieee80211_security *secinfo = &ieee->sec;
1185         int keyidx;
1186
1187         dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
1188
1189         for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
1190                 if (sec->flags & (1<<keyidx)) {
1191                         secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
1192                         secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
1193                         memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
1194                                SCM_KEY_LEN);
1195                 }
1196
1197         if (sec->flags & SEC_ACTIVE_KEY) {
1198                 secinfo->active_key = sec->active_key;
1199                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1200                         "   .active_key = %d\n", sec->active_key);
1201         }
1202         if (sec->flags & SEC_UNICAST_GROUP) {
1203                 secinfo->unicast_uses_group = sec->unicast_uses_group;
1204                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1205                         "   .unicast_uses_group = %d\n",
1206                         sec->unicast_uses_group);
1207         }
1208         if (sec->flags & SEC_LEVEL) {
1209                 secinfo->level = sec->level;
1210                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1211                         "   .level = %d\n", sec->level);
1212         }
1213         if (sec->flags & SEC_ENABLED) {
1214                 secinfo->enabled = sec->enabled;
1215                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1216                         "   .enabled = %d\n", sec->enabled);
1217         }
1218         if (sec->flags & SEC_ENCRYPT) {
1219                 secinfo->encrypt = sec->encrypt;
1220                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1221                         "   .encrypt = %d\n", sec->encrypt);
1222         }
1223         if (sec->flags & SEC_AUTH_MODE) {
1224                 secinfo->auth_mode = sec->auth_mode;
1225                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1226                         "   .auth_mode = %d\n", sec->auth_mode);
1227         }
1228 }
1229
1230 static void ieee_init(struct ieee80211_device *ieee)
1231 {
1232         ieee->mode = IEEE_B | IEEE_G;
1233         ieee->freq_band = IEEE80211_24GHZ_BAND;
1234         ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
1235         ieee->tx_headroom = sizeof(struct zd_ctrlset);
1236         ieee->set_security = set_security;
1237         ieee->hard_start_xmit = netdev_tx;
1238
1239         /* Software encryption/decryption for now */
1240         ieee->host_build_iv = 0;
1241         ieee->host_encrypt = 1;
1242         ieee->host_decrypt = 1;
1243
1244         /* FIXME: default to managed mode, until ieee80211 and zd1211rw can
1245          * correctly support AUTO */
1246         ieee->iw_mode = IW_MODE_INFRA;
1247 }
1248
1249 static void softmac_init(struct ieee80211softmac_device *sm)
1250 {
1251         sm->set_channel = set_channel;
1252         sm->bssinfo_change = bssinfo_change;
1253 }
1254
1255 struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
1256 {
1257         struct zd_mac *mac = zd_netdev_mac(ndev);
1258         struct iw_statistics *iw_stats = &mac->iw_stats;
1259         unsigned int i, count, qual_total, rssi_total;
1260
1261         memset(iw_stats, 0, sizeof(struct iw_statistics));
1262         /* We are not setting the status, because ieee->state is not updated
1263          * at all and this driver doesn't track authentication state.
1264          */
1265         spin_lock_irq(&mac->lock);
1266         count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ?
1267                 mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE;
1268         qual_total = rssi_total = 0;
1269         for (i = 0; i < count; i++) {
1270                 qual_total += mac->qual_buffer[i];
1271                 rssi_total += mac->rssi_buffer[i];
1272         }
1273         spin_unlock_irq(&mac->lock);
1274         iw_stats->qual.updated = IW_QUAL_NOISE_INVALID;
1275         if (count > 0) {
1276                 iw_stats->qual.qual = qual_total / count;
1277                 iw_stats->qual.level = rssi_total / count;
1278                 iw_stats->qual.updated |=
1279                         IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED;
1280         } else {
1281                 iw_stats->qual.updated |=
1282                         IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID;
1283         }
1284         /* TODO: update counter */
1285         return iw_stats;
1286 }
1287
1288 #define LINK_LED_WORK_DELAY HZ
1289
1290 static void link_led_handler(struct work_struct *work)
1291 {
1292         struct zd_mac *mac =
1293                 container_of(work, struct zd_mac, housekeeping.link_led_work.work);
1294         struct zd_chip *chip = &mac->chip;
1295         struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev);
1296         int is_associated;
1297         int r;
1298
1299         spin_lock_irq(&mac->lock);
1300         is_associated = sm->associnfo.associated != 0;
1301         spin_unlock_irq(&mac->lock);
1302
1303         r = zd_chip_control_leds(chip,
1304                                  is_associated ? LED_ASSOCIATED : LED_SCANNING);
1305         if (r)
1306                 dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
1307
1308         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1309                            LINK_LED_WORK_DELAY);
1310 }
1311
1312 static void housekeeping_init(struct zd_mac *mac)
1313 {
1314         INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
1315 }
1316
1317 static void housekeeping_enable(struct zd_mac *mac)
1318 {
1319         dev_dbg_f(zd_mac_dev(mac), "\n");
1320         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1321                            0);
1322 }
1323
1324 static void housekeeping_disable(struct zd_mac *mac)
1325 {
1326         dev_dbg_f(zd_mac_dev(mac), "\n");
1327         cancel_rearming_delayed_workqueue(zd_workqueue,
1328                 &mac->housekeeping.link_led_work);
1329         zd_chip_control_leds(&mac->chip, LED_OFF);
1330 }