SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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_preinit_hw(struct zd_mac *mac)
  90 {
  91         int r;
  92         u8 addr[ETH_ALEN];
  93
  94         r = zd_chip_read_mac_addr_fw(&mac->chip, addr);
  95         if (r)
  96                 return r;
  97
  98         memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
  99         return 0;
 100 }
 101
 102 int zd_mac_init_hw(struct zd_mac *mac)
 103 {
 104         int r;
 105         struct zd_chip *chip = &mac->chip;
 106         u8 default_regdomain;
 107
 108         r = zd_chip_enable_int(chip);
 109         if (r)
 110                 goto out;
 111         r = zd_chip_init_hw(chip);
 112         if (r)
 113                 goto disable_int;
 114
 115         ZD_ASSERT(!irqs_disabled());
 116
 117         r = zd_read_regdomain(chip, &default_regdomain);
 118         if (r)
 119                 goto disable_int;
 120         if (!zd_regdomain_supported(default_regdomain)) {
 121                 /* The vendor driver overrides the regulatory domain and
 122                  * allowed channel registers and unconditionally restricts
 123                  * available channels to 1-11 everywhere. Match their
 124                  * questionable behaviour only for regdomains which we don't
 125                  * recognise. */
 126                 dev_warn(zd_mac_dev(mac),  "Unrecognised regulatory domain: "
 127                         "%#04x. Defaulting to FCC.\n", default_regdomain);
 128                 default_regdomain = ZD_REGDOMAIN_FCC;
 129         }
 130         spin_lock_irq(&mac->lock);
 131         mac->regdomain = mac->default_regdomain = default_regdomain;
 132         spin_unlock_irq(&mac->lock);
 133         r = reset_channel(mac);
 134         if (r)
 135                 goto disable_int;
 136
 137         /* We must inform the device that we are doing encryption/decryption in
 138          * software at the moment. */
 139         r = zd_set_encryption_type(chip, ENC_SNIFFER);
 140         if (r)
 141                 goto disable_int;
 142
 143         r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
 144         if (r)
 145                 goto disable_int;
 146
 147         r = 0;
 148 disable_int:
 149         zd_chip_disable_int(chip);
 150 out:
 151         return r;
 152 }
 153
 154 void zd_mac_clear(struct zd_mac *mac)
 155 {
 156         flush_workqueue(zd_workqueue);
 157         skb_queue_purge(&mac->rx_queue);
 158         tasklet_kill(&mac->rx_tasklet);
 159         zd_chip_clear(&mac->chip);
 160         ZD_ASSERT(!spin_is_locked(&mac->lock));
 161         ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
 162 }
 163
 164 static int reset_mode(struct zd_mac *mac)
 165 {
 166         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 167         u32 filter = (ieee->iw_mode == IW_MODE_MONITOR) ? ~0 : STA_RX_FILTER;
 168         return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter);
 169 }
 170
 171 int zd_mac_open(struct net_device *netdev)
 172 {
 173         struct zd_mac *mac = zd_netdev_mac(netdev);
 174         struct zd_chip *chip = &mac->chip;
 175         struct zd_usb *usb = &chip->usb;
 176         int r;
 177
 178         if (!usb->initialized) {
 179                 r = zd_usb_init_hw(usb);
 180                 if (r)
 181                         goto out;
 182         }
 183
 184         tasklet_enable(&mac->rx_tasklet);
 185
 186         r = zd_chip_enable_int(chip);
 187         if (r < 0)
 188                 goto out;
 189
 190         r = zd_write_mac_addr(chip, netdev->dev_addr);
 191         if (r)
 192                 goto disable_int;
 193
 194         r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
 195         if (r < 0)
 196                 goto disable_int;
 197         r = reset_mode(mac);
 198         if (r)
 199                 goto disable_int;
 200         r = zd_chip_switch_radio_on(chip);
 201         if (r < 0)
 202                 goto disable_int;
 203         r = zd_chip_set_channel(chip, mac->requested_channel);
 204         if (r < 0)
 205                 goto disable_radio;
 206         r = zd_chip_enable_rx(chip);
 207         if (r < 0)
 208                 goto disable_radio;
 209         r = zd_chip_enable_hwint(chip);
 210         if (r < 0)
 211                 goto disable_rx;
 212
 213         housekeeping_enable(mac);
 214         ieee80211softmac_start(netdev);
 215         return 0;
 216 disable_rx:
 217         zd_chip_disable_rx(chip);
 218 disable_radio:
 219         zd_chip_switch_radio_off(chip);
 220 disable_int:
 221         zd_chip_disable_int(chip);
 222 out:
 223         return r;
 224 }
 225
 226 int zd_mac_stop(struct net_device *netdev)
 227 {
 228         struct zd_mac *mac = zd_netdev_mac(netdev);
 229         struct zd_chip *chip = &mac->chip;
 230
 231         netif_stop_queue(netdev);
 232
 233         /*
 234          * The order here deliberately is a little different from the open()
 235          * method, since we need to make sure there is no opportunity for RX
 236          * frames to be processed by softmac after we have stopped it.
 237          */
 238
 239         zd_chip_disable_rx(chip);
 240         skb_queue_purge(&mac->rx_queue);
 241         tasklet_disable(&mac->rx_tasklet);
 242         housekeeping_disable(mac);
 243         ieee80211softmac_stop(netdev);
 244
 245         /* Ensure no work items are running or queued from this point */
 246         cancel_delayed_work(&mac->set_rts_cts_work);
 247         cancel_delayed_work(&mac->set_basic_rates_work);
 248         flush_workqueue(zd_workqueue);
 249         mac->updating_rts_rate = 0;
 250         mac->updating_basic_rates = 0;
 251
 252         zd_chip_disable_hwint(chip);
 253         zd_chip_switch_radio_off(chip);
 254         zd_chip_disable_int(chip);
 255
 256         return 0;
 257 }
 258
 259 int zd_mac_set_mac_address(struct net_device *netdev, void *p)
 260 {
 261         int r;
 262         unsigned long flags;
 263         struct sockaddr *addr = p;
 264         struct zd_mac *mac = zd_netdev_mac(netdev);
 265         struct zd_chip *chip = &mac->chip;
 266
 267         if (!is_valid_ether_addr(addr->sa_data))
 268                 return -EADDRNOTAVAIL;
 269
 270         dev_dbg_f(zd_mac_dev(mac),
 271                   "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data));
 272
 273         if (netdev->flags & IFF_UP) {
 274                 r = zd_write_mac_addr(chip, addr->sa_data);
 275                 if (r)
 276                         return r;
 277         }
 278
 279         spin_lock_irqsave(&mac->lock, flags);
 280         memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
 281         spin_unlock_irqrestore(&mac->lock, flags);
 282
 283         return 0;
 284 }
 285
 286 static void set_multicast_hash_handler(struct work_struct *work)
 287 {
 288         struct zd_mac *mac = container_of(work, struct zd_mac,
 289                                           set_multicast_hash_work);
 290         struct zd_mc_hash hash;
 291
 292         spin_lock_irq(&mac->lock);
 293         hash = mac->multicast_hash;
 294         spin_unlock_irq(&mac->lock);
 295
 296         zd_chip_set_multicast_hash(&mac->chip, &hash);
 297 }
 298
 299 void zd_mac_set_multicast_list(struct net_device *dev)
 300 {
 301         struct zd_mc_hash hash;
 302         struct zd_mac *mac = zd_netdev_mac(dev);
 303         struct dev_mc_list *mc;
 304         unsigned long flags;
 305
 306         if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
 307                 zd_mc_add_all(&hash);
 308         } else {
 309                 zd_mc_clear(&hash);
 310                 for (mc = dev->mc_list; mc; mc = mc->next) {
 311                         dev_dbg_f(zd_mac_dev(mac), "mc addr " MAC_FMT "\n",
 312                                   MAC_ARG(mc->dmi_addr));
 313                         zd_mc_add_addr(&hash, mc->dmi_addr);
 314                 }
 315         }
 316
 317         spin_lock_irqsave(&mac->lock, flags);
 318         mac->multicast_hash = hash;
 319         spin_unlock_irqrestore(&mac->lock, flags);
 320         queue_work(zd_workqueue, &mac->set_multicast_hash_work);
 321 }
 322
 323 int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
 324 {
 325         int r;
 326         u8 channel;
 327
 328         ZD_ASSERT(!irqs_disabled());
 329         spin_lock_irq(&mac->lock);
 330         if (regdomain == 0) {
 331                 regdomain = mac->default_regdomain;
 332         }
 333         if (!zd_regdomain_supported(regdomain)) {
 334                 spin_unlock_irq(&mac->lock);
 335                 return -EINVAL;
 336         }
 337         mac->regdomain = regdomain;
 338         channel = mac->requested_channel;
 339         spin_unlock_irq(&mac->lock);
 340
 341         r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
 342         if (r)
 343                 return r;
 344         if (!zd_regdomain_supports_channel(regdomain, channel)) {
 345                 r = reset_channel(mac);
 346                 if (r)
 347                         return r;
 348         }
 349
 350         return 0;
 351 }
 352
 353 u8 zd_mac_get_regdomain(struct zd_mac *mac)
 354 {
 355         unsigned long flags;
 356         u8 regdomain;
 357
 358         spin_lock_irqsave(&mac->lock, flags);
 359         regdomain = mac->regdomain;
 360         spin_unlock_irqrestore(&mac->lock, flags);
 361         return regdomain;
 362 }
 363
 364 /* Fallback to lowest rate, if rate is unknown. */
 365 static u8 rate_to_zd_rate(u8 rate)
 366 {
 367         switch (rate) {
 368         case IEEE80211_CCK_RATE_2MB:
 369                 return ZD_CCK_RATE_2M;
 370         case IEEE80211_CCK_RATE_5MB:
 371                 return ZD_CCK_RATE_5_5M;
 372         case IEEE80211_CCK_RATE_11MB:
 373                 return ZD_CCK_RATE_11M;
 374         case IEEE80211_OFDM_RATE_6MB:
 375                 return ZD_OFDM_RATE_6M;
 376         case IEEE80211_OFDM_RATE_9MB:
 377                 return ZD_OFDM_RATE_9M;
 378         case IEEE80211_OFDM_RATE_12MB:
 379                 return ZD_OFDM_RATE_12M;
 380         case IEEE80211_OFDM_RATE_18MB:
 381                 return ZD_OFDM_RATE_18M;
 382         case IEEE80211_OFDM_RATE_24MB:
 383                 return ZD_OFDM_RATE_24M;
 384         case IEEE80211_OFDM_RATE_36MB:
 385                 return ZD_OFDM_RATE_36M;
 386         case IEEE80211_OFDM_RATE_48MB:
 387                 return ZD_OFDM_RATE_48M;
 388         case IEEE80211_OFDM_RATE_54MB:
 389                 return ZD_OFDM_RATE_54M;
 390         }
 391         return ZD_CCK_RATE_1M;
 392 }
 393
 394 static u16 rate_to_cr_rate(u8 rate)
 395 {
 396         switch (rate) {
 397         case IEEE80211_CCK_RATE_2MB:
 398                 return CR_RATE_1M;
 399         case IEEE80211_CCK_RATE_5MB:
 400                 return CR_RATE_5_5M;
 401         case IEEE80211_CCK_RATE_11MB:
 402                 return CR_RATE_11M;
 403         case IEEE80211_OFDM_RATE_6MB:
 404                 return CR_RATE_6M;
 405         case IEEE80211_OFDM_RATE_9MB:
 406                 return CR_RATE_9M;
 407         case IEEE80211_OFDM_RATE_12MB:
 408                 return CR_RATE_12M;
 409         case IEEE80211_OFDM_RATE_18MB:
 410                 return CR_RATE_18M;
 411         case IEEE80211_OFDM_RATE_24MB:
 412                 return CR_RATE_24M;
 413         case IEEE80211_OFDM_RATE_36MB:
 414                 return CR_RATE_36M;
 415         case IEEE80211_OFDM_RATE_48MB:
 416                 return CR_RATE_48M;
 417         case IEEE80211_OFDM_RATE_54MB:
 418                 return CR_RATE_54M;
 419         }
 420         return CR_RATE_1M;
 421 }
 422
 423 static void try_enable_tx(struct zd_mac *mac)
 424 {
 425         unsigned long flags;
 426
 427         spin_lock_irqsave(&mac->lock, flags);
 428         if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
 429                 netif_wake_queue(mac->netdev);
 430         spin_unlock_irqrestore(&mac->lock, flags);
 431 }
 432
 433 static void set_rts_cts_work(struct work_struct *work)
 434 {
 435         struct zd_mac *mac =
 436                 container_of(work, struct zd_mac, set_rts_cts_work.work);
 437         unsigned long flags;
 438         u8 rts_rate;
 439         unsigned int short_preamble;
 440
 441         mutex_lock(&mac->chip.mutex);
 442
 443         spin_lock_irqsave(&mac->lock, flags);
 444         mac->updating_rts_rate = 0;
 445         rts_rate = mac->rts_rate;
 446         short_preamble = mac->short_preamble;
 447         spin_unlock_irqrestore(&mac->lock, flags);
 448
 449         zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
 450         mutex_unlock(&mac->chip.mutex);
 451
 452         try_enable_tx(mac);
 453 }
 454
 455 static void set_basic_rates_work(struct work_struct *work)
 456 {
 457         struct zd_mac *mac =
 458                 container_of(work, struct zd_mac, set_basic_rates_work.work);
 459         unsigned long flags;
 460         u16 basic_rates;
 461
 462         mutex_lock(&mac->chip.mutex);
 463
 464         spin_lock_irqsave(&mac->lock, flags);
 465         mac->updating_basic_rates = 0;
 466         basic_rates = mac->basic_rates;
 467         spin_unlock_irqrestore(&mac->lock, flags);
 468
 469         zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
 470         mutex_unlock(&mac->chip.mutex);
 471
 472         try_enable_tx(mac);
 473 }
 474
 475 static void bssinfo_change(struct net_device *netdev, u32 changes)
 476 {
 477         struct zd_mac *mac = zd_netdev_mac(netdev);
 478         struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
 479         struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
 480         int need_set_rts_cts = 0;
 481         int need_set_rates = 0;
 482         u16 basic_rates;
 483         unsigned long flags;
 484
 485         dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
 486
 487         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
 488                 spin_lock_irqsave(&mac->lock, flags);
 489                 mac->short_preamble = bssinfo->short_preamble;
 490                 spin_unlock_irqrestore(&mac->lock, flags);
 491                 need_set_rts_cts = 1;
 492         }
 493
 494         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
 495                 /* Set RTS rate to highest available basic rate */
 496                 u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac,
 497                         &bssinfo->supported_rates, 1);
 498                 hi_rate = rate_to_zd_rate(hi_rate);
 499
 500                 spin_lock_irqsave(&mac->lock, flags);
 501                 if (hi_rate != mac->rts_rate) {
 502                         mac->rts_rate = hi_rate;
 503                         need_set_rts_cts = 1;
 504                 }
 505                 spin_unlock_irqrestore(&mac->lock, flags);
 506
 507                 /* Set basic rates */
 508                 need_set_rates = 1;
 509                 if (bssinfo->supported_rates.count == 0) {
 510                         /* Allow the device to be flexible */
 511                         basic_rates = CR_RATES_80211B | CR_RATES_80211G;
 512                 } else {
 513                         int i = 0;
 514                         basic_rates = 0;
 515
 516                         for (i = 0; i < bssinfo->supported_rates.count; i++) {
 517                                 u16 rate = bssinfo->supported_rates.rates[i];
 518                                 if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
 519                                         continue;
 520
 521                                 rate &= ~IEEE80211_BASIC_RATE_MASK;
 522                                 basic_rates |= rate_to_cr_rate(rate);
 523                         }
 524                 }
 525                 spin_lock_irqsave(&mac->lock, flags);
 526                 mac->basic_rates = basic_rates;
 527                 spin_unlock_irqrestore(&mac->lock, flags);
 528         }
 529
 530         /* Schedule any changes we made above */
 531
 532         spin_lock_irqsave(&mac->lock, flags);
 533         if (need_set_rts_cts && !mac->updating_rts_rate) {
 534                 mac->updating_rts_rate = 1;
 535                 netif_stop_queue(mac->netdev);
 536                 queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0);
 537         }
 538         if (need_set_rates && !mac->updating_basic_rates) {
 539                 mac->updating_basic_rates = 1;
 540                 netif_stop_queue(mac->netdev);
 541                 queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work,
 542                                    0);
 543         }
 544         spin_unlock_irqrestore(&mac->lock, flags);
 545 }
 546
 547 static void set_channel(struct net_device *netdev, u8 channel)
 548 {
 549         struct zd_mac *mac = zd_netdev_mac(netdev);
 550
 551         dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
 552
 553         zd_chip_set_channel(&mac->chip, channel);
 554 }
 555
 556 int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
 557 {
 558         unsigned long lock_flags;
 559         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 560
 561         if (ieee->iw_mode == IW_MODE_INFRA)
 562                 return -EPERM;
 563
 564         spin_lock_irqsave(&mac->lock, lock_flags);
 565         if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
 566                 spin_unlock_irqrestore(&mac->lock, lock_flags);
 567                 return -EINVAL;
 568         }
 569         mac->requested_channel = channel;
 570         spin_unlock_irqrestore(&mac->lock, lock_flags);
 571         if (netif_running(mac->netdev))
 572                 return zd_chip_set_channel(&mac->chip, channel);
 573         else
 574                 return 0;
 575 }
 576
 577 u8 zd_mac_get_channel(struct zd_mac *mac)
 578 {
 579         u8 channel = zd_chip_get_channel(&mac->chip);
 580
 581         dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel);
 582         return channel;
 583 }
 584
 585 /* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
 586 static u8 zd_rate_typed(u8 zd_rate)
 587 {
 588         static const u8 typed_rates[16] = {
 589                 [ZD_CCK_RATE_1M]        = ZD_CS_CCK|ZD_CCK_RATE_1M,
 590                 [ZD_CCK_RATE_2M]        = ZD_CS_CCK|ZD_CCK_RATE_2M,
 591                 [ZD_CCK_RATE_5_5M]      = ZD_CS_CCK|ZD_CCK_RATE_5_5M,
 592                 [ZD_CCK_RATE_11M]       = ZD_CS_CCK|ZD_CCK_RATE_11M,
 593                 [ZD_OFDM_RATE_6M]       = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
 594                 [ZD_OFDM_RATE_9M]       = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
 595                 [ZD_OFDM_RATE_12M]      = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
 596                 [ZD_OFDM_RATE_18M]      = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
 597                 [ZD_OFDM_RATE_24M]      = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
 598                 [ZD_OFDM_RATE_36M]      = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
 599                 [ZD_OFDM_RATE_48M]      = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
 600                 [ZD_OFDM_RATE_54M]      = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
 601         };
 602
 603         ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
 604         return typed_rates[zd_rate & ZD_CS_RATE_MASK];
 605 }
 606
 607 int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
 608 {
 609         struct ieee80211_device *ieee;
 610
 611         switch (mode) {
 612         case IW_MODE_AUTO:
 613         case IW_MODE_ADHOC:
 614         case IW_MODE_INFRA:
 615                 mac->netdev->type = ARPHRD_ETHER;
 616                 break;
 617         case IW_MODE_MONITOR:
 618                 mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
 619                 break;
 620         default:
 621                 dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
 622                 return -EINVAL;
 623         }
 624
 625         ieee = zd_mac_to_ieee80211(mac);
 626         ZD_ASSERT(!irqs_disabled());
 627         spin_lock_irq(&ieee->lock);
 628         ieee->iw_mode = mode;
 629         spin_unlock_irq(&ieee->lock);
 630
 631         if (netif_running(mac->netdev))
 632                 return reset_mode(mac);
 633
 634         return 0;
 635 }
 636
 637 int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
 638 {
 639         unsigned long flags;
 640         struct ieee80211_device *ieee;
 641
 642         ieee = zd_mac_to_ieee80211(mac);
 643         spin_lock_irqsave(&ieee->lock, flags);
 644         *mode = ieee->iw_mode;
 645         spin_unlock_irqrestore(&ieee->lock, flags);
 646         return 0;
 647 }
 648
 649 int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
 650 {
 651         int i;
 652         const struct channel_range *channel_range;
 653         u8 regdomain;
 654
 655         memset(range, 0, sizeof(*range));
 656
 657         /* FIXME: Not so important and depends on the mode. For 802.11g
 658          * usually this value is used. It seems to be that Bit/s number is
 659          * given here.
 660          */
 661         range->throughput = 27 * 1000 * 1000;
 662
 663         range->max_qual.qual = 100;
 664         range->max_qual.level = 100;
 665
 666         /* FIXME: Needs still to be tuned. */
 667         range->avg_qual.qual = 71;
 668         range->avg_qual.level = 80;
 669
 670         /* FIXME: depends on standard? */
 671         range->min_rts = 256;
 672         range->max_rts = 2346;
 673
 674         range->min_frag = MIN_FRAG_THRESHOLD;
 675         range->max_frag = MAX_FRAG_THRESHOLD;
 676
 677         range->max_encoding_tokens = WEP_KEYS;
 678         range->num_encoding_sizes = 2;
 679         range->encoding_size[0] = 5;
 680         range->encoding_size[1] = WEP_KEY_LEN;
 681
 682         range->we_version_compiled = WIRELESS_EXT;
 683         range->we_version_source = 20;
 684
 685         range->enc_capa = IW_ENC_CAPA_WPA |  IW_ENC_CAPA_WPA2 |
 686                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
 687
 688         ZD_ASSERT(!irqs_disabled());
 689         spin_lock_irq(&mac->lock);
 690         regdomain = mac->regdomain;
 691         spin_unlock_irq(&mac->lock);
 692         channel_range = zd_channel_range(regdomain);
 693
 694         range->num_channels = channel_range->end - channel_range->start;
 695         range->old_num_channels = range->num_channels;
 696         range->num_frequency = range->num_channels;
 697         range->old_num_frequency = range->num_frequency;
 698
 699         for (i = 0; i < range->num_frequency; i++) {
 700                 struct iw_freq *freq = &range->freq[i];
 701                 freq->i = channel_range->start + i;
 702                 zd_channel_to_freq(freq, freq->i);
 703         }
 704
 705         return 0;
 706 }
 707
 708 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
 709 {
 710         static const u8 rate_divisor[] = {
 711                 [ZD_CCK_RATE_1M]        =  1,
 712                 [ZD_CCK_RATE_2M]        =  2,
 713                 [ZD_CCK_RATE_5_5M]      = 11, /* bits must be doubled */
 714                 [ZD_CCK_RATE_11M]       = 11,
 715                 [ZD_OFDM_RATE_6M]       =  6,
 716                 [ZD_OFDM_RATE_9M]       =  9,
 717                 [ZD_OFDM_RATE_12M]      = 12,
 718                 [ZD_OFDM_RATE_18M]      = 18,
 719                 [ZD_OFDM_RATE_24M]      = 24,
 720                 [ZD_OFDM_RATE_36M]      = 36,
 721                 [ZD_OFDM_RATE_48M]      = 48,
 722                 [ZD_OFDM_RATE_54M]      = 54,
 723         };
 724
 725         u32 bits = (u32)tx_length * 8;
 726         u32 divisor;
 727
 728         divisor = rate_divisor[zd_rate];
 729         if (divisor == 0)
 730                 return -EINVAL;
 731
 732         switch (zd_rate) {
 733         case ZD_CCK_RATE_5_5M:
 734                 bits = (2*bits) + 10; /* round up to the next integer */
 735                 break;
 736         case ZD_CCK_RATE_11M:
 737                 if (service) {
 738                         u32 t = bits % 11;
 739                         *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
 740                         if (0 < t && t <= 3) {
 741                                 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
 742                         }
 743                 }
 744                 bits += 10; /* round up to the next integer */
 745                 break;
 746         }
 747
 748         return bits/divisor;
 749 }
 750
 751 enum {
 752         R2M_SHORT_PREAMBLE = 0x01,
 753         R2M_11A            = 0x02,
 754 };
 755
 756 static u8 zd_rate_to_modulation(u8 zd_rate, int flags)
 757 {
 758         u8 modulation;
 759
 760         modulation = zd_rate_typed(zd_rate);
 761         if (flags & R2M_SHORT_PREAMBLE) {
 762                 switch (ZD_CS_RATE(modulation)) {
 763                 case ZD_CCK_RATE_2M:
 764                 case ZD_CCK_RATE_5_5M:
 765                 case ZD_CCK_RATE_11M:
 766                         modulation |= ZD_CS_CCK_PREA_SHORT;
 767                         return modulation;
 768                 }
 769         }
 770         if (flags & R2M_11A) {
 771                 if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM)
 772                         modulation |= ZD_CS_OFDM_MODE_11A;
 773         }
 774         return modulation;
 775 }
 776
 777 static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
 778                               struct ieee80211_hdr_4addr *hdr)
 779 {
 780         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
 781         u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
 782         u8 rate, zd_rate;
 783         int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
 784         int is_multicast = is_multicast_ether_addr(hdr->addr1);
 785         int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
 786                 is_multicast, is_mgt);
 787         int flags = 0;
 788
 789         /* FIXME: 802.11a? */
 790         rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
 791
 792         if (short_preamble)
 793                 flags |= R2M_SHORT_PREAMBLE;
 794
 795         zd_rate = rate_to_zd_rate(rate);
 796         cs->modulation = zd_rate_to_modulation(zd_rate, flags);
 797 }
 798
 799 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
 800                            struct ieee80211_hdr_4addr *header)
 801 {
 802         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
 803         unsigned int tx_length = le16_to_cpu(cs->tx_length);
 804         u16 fctl = le16_to_cpu(header->frame_ctl);
 805         u16 ftype = WLAN_FC_GET_TYPE(fctl);
 806         u16 stype = WLAN_FC_GET_STYPE(fctl);
 807
 808         /*
 809          * CONTROL TODO:
 810          * - if backoff needed, enable bit 0
 811          * - if burst (backoff not needed) disable bit 0
 812          */
 813
 814         cs->control = 0;
 815
 816         /* First fragment */
 817         if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0)
 818                 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
 819
 820         /* Multicast */
 821         if (is_multicast_ether_addr(header->addr1))
 822                 cs->control |= ZD_CS_MULTICAST;
 823
 824         /* PS-POLL */
 825         if (stype == IEEE80211_STYPE_PSPOLL)
 826                 cs->control |= ZD_CS_PS_POLL_FRAME;
 827
 828         /* Unicast data frames over the threshold should have RTS */
 829         if (!is_multicast_ether_addr(header->addr1) &&
 830                 ftype != IEEE80211_FTYPE_MGMT &&
 831                     tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
 832                 cs->control |= ZD_CS_RTS;
 833
 834         /* Use CTS-to-self protection if required */
 835         if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM &&
 836                         ieee80211softmac_protection_needed(softmac)) {
 837                 /* FIXME: avoid sending RTS *and* self-CTS, is that correct? */
 838                 cs->control &= ~ZD_CS_RTS;
 839                 cs->control |= ZD_CS_SELF_CTS;
 840         }
 841
 842         /* FIXME: Management frame? */
 843 }
 844
 845 static int fill_ctrlset(struct zd_mac *mac,
 846                         struct ieee80211_txb *txb,
 847                         int frag_num)
 848 {
 849         int r;
 850         struct sk_buff *skb = txb->fragments[frag_num];
 851         struct ieee80211_hdr_4addr *hdr =
 852                 (struct ieee80211_hdr_4addr *) skb->data;
 853         unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
 854         unsigned int next_frag_len;
 855         unsigned int packet_length;
 856         struct zd_ctrlset *cs = (struct zd_ctrlset *)
 857                 skb_push(skb, sizeof(struct zd_ctrlset));
 858
 859         if (frag_num+1  < txb->nr_frags) {
 860                 next_frag_len = txb->fragments[frag_num+1]->len +
 861                                 IEEE80211_FCS_LEN;
 862         } else {
 863                 next_frag_len = 0;
 864         }
 865         ZD_ASSERT(frag_len <= 0xffff);
 866         ZD_ASSERT(next_frag_len <= 0xffff);
 867
 868         cs_set_modulation(mac, cs, hdr);
 869
 870         cs->tx_length = cpu_to_le16(frag_len);
 871
 872         cs_set_control(mac, cs, hdr);
 873
 874         packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
 875         ZD_ASSERT(packet_length <= 0xffff);
 876         /* ZD1211B: Computing the length difference this way, gives us
 877          * flexibility to compute the packet length.
 878          */
 879         cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ?
 880                         packet_length - frag_len : packet_length);
 881
 882         /*
 883          * CURRENT LENGTH:
 884          * - transmit frame length in microseconds
 885          * - seems to be derived from frame length
 886          * - see Cal_Us_Service() in zdinlinef.h
 887          * - if macp->bTxBurstEnable is enabled, then multiply by 4
 888          *  - bTxBurstEnable is never set in the vendor driver
 889          *
 890          * SERVICE:
 891          * - "for PLCP configuration"
 892          * - always 0 except in some situations at 802.11b 11M
 893          * - see line 53 of zdinlinef.h
 894          */
 895         cs->service = 0;
 896         r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
 897                                  le16_to_cpu(cs->tx_length));
 898         if (r < 0)
 899                 return r;
 900         cs->current_length = cpu_to_le16(r);
 901
 902         if (next_frag_len == 0) {
 903                 cs->next_frame_length = 0;
 904         } else {
 905                 r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
 906                                          next_frag_len);
 907                 if (r < 0)
 908                         return r;
 909                 cs->next_frame_length = cpu_to_le16(r);
 910         }
 911
 912         return 0;
 913 }
 914
 915 static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
 916 {
 917         int i, r;
 918         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 919
 920         for (i = 0; i < txb->nr_frags; i++) {
 921                 struct sk_buff *skb = txb->fragments[i];
 922
 923                 r = fill_ctrlset(mac, txb, i);
 924                 if (r) {
 925                         ieee->stats.tx_dropped++;
 926                         return r;
 927                 }
 928                 r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
 929                 if (r) {
 930                         ieee->stats.tx_dropped++;
 931                         return r;
 932                 }
 933         }
 934
 935         /* FIXME: shouldn't this be handled by the upper layers? */
 936         mac->netdev->trans_start = jiffies;
 937
 938         ieee80211_txb_free(txb);
 939         return 0;
 940 }
 941
 942 struct zd_rt_hdr {
 943         struct ieee80211_radiotap_header rt_hdr;
 944         u8  rt_flags;
 945         u8  rt_rate;
 946         u16 rt_channel;
 947         u16 rt_chbitmask;
 948 } __attribute__((packed));
 949
 950 static void fill_rt_header(void *buffer, struct zd_mac *mac,
 951                            const struct ieee80211_rx_stats *stats,
 952                            const struct rx_status *status)
 953 {
 954         struct zd_rt_hdr *hdr = buffer;
 955
 956         hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 957         hdr->rt_hdr.it_pad = 0;
 958         hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
 959         hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 960                                  (1 << IEEE80211_RADIOTAP_CHANNEL) |
 961                                  (1 << IEEE80211_RADIOTAP_RATE));
 962
 963         hdr->rt_flags = 0;
 964         if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
 965                 hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
 966
 967         hdr->rt_rate = stats->rate / 5;
 968
 969         /* FIXME: 802.11a */
 970         hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
 971                                              _zd_chip_get_channel(&mac->chip)));
 972         hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
 973                 ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
 974                 ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
 975 }
 976
 977 /* Returns 1 if the data packet is for us and 0 otherwise. */
 978 static int is_data_packet_for_us(struct ieee80211_device *ieee,
 979                                  struct ieee80211_hdr_4addr *hdr)
 980 {
 981         struct net_device *netdev = ieee->dev;
 982         u16 fc = le16_to_cpu(hdr->frame_ctl);
 983
 984         ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
 985
 986         switch (ieee->iw_mode) {
 987         case IW_MODE_ADHOC:
 988                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
 989                     compare_ether_addr(hdr->addr3, ieee->bssid) != 0)
 990                         return 0;
 991                 break;
 992         case IW_MODE_AUTO:
 993         case IW_MODE_INFRA:
 994                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
 995                     IEEE80211_FCTL_FROMDS ||
 996                     compare_ether_addr(hdr->addr2, ieee->bssid) != 0)
 997                         return 0;
 998                 break;
 999         default:
1000                 ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
1001                 return 0;
1002         }
1003
1004         return compare_ether_addr(hdr->addr1, netdev->dev_addr) == 0 ||
1005                (is_multicast_ether_addr(hdr->addr1) &&
1006                 compare_ether_addr(hdr->addr3, netdev->dev_addr) != 0) ||
1007                (netdev->flags & IFF_PROMISC);
1008 }
1009
1010 /* Filters received packets. The function returns 1 if the packet should be
1011  * forwarded to ieee80211_rx(). If the packet should be ignored the function
1012  * returns 0. If an invalid packet is found the function returns -EINVAL.
1013  *
1014  * The function calls ieee80211_rx_mgt() directly.
1015  *
1016  * It has been based on ieee80211_rx_any.
1017  */
1018 static int filter_rx(struct ieee80211_device *ieee,
1019                      const u8 *buffer, unsigned int length,
1020                      struct ieee80211_rx_stats *stats)
1021 {
1022         struct ieee80211_hdr_4addr *hdr;
1023         u16 fc;
1024
1025         if (ieee->iw_mode == IW_MODE_MONITOR)
1026                 return 1;
1027
1028         hdr = (struct ieee80211_hdr_4addr *)buffer;
1029         fc = le16_to_cpu(hdr->frame_ctl);
1030         if ((fc & IEEE80211_FCTL_VERS) != 0)
1031                 return -EINVAL;
1032
1033         switch (WLAN_FC_GET_TYPE(fc)) {
1034         case IEEE80211_FTYPE_MGMT:
1035                 if (length < sizeof(struct ieee80211_hdr_3addr))
1036                         return -EINVAL;
1037                 ieee80211_rx_mgt(ieee, hdr, stats);
1038                 return 0;
1039         case IEEE80211_FTYPE_CTL:
1040                 return 0;
1041         case IEEE80211_FTYPE_DATA:
1042                 /* Ignore invalid short buffers */
1043                 if (length < sizeof(struct ieee80211_hdr_3addr))
1044                         return -EINVAL;
1045                 return is_data_packet_for_us(ieee, hdr);
1046         }
1047
1048         return -EINVAL;
1049 }
1050
1051 static void update_qual_rssi(struct zd_mac *mac,
1052                              const u8 *buffer, unsigned int length,
1053                              u8 qual_percent, u8 rssi_percent)
1054 {
1055         unsigned long flags;
1056         struct ieee80211_hdr_3addr *hdr;
1057         int i;
1058
1059         hdr = (struct ieee80211_hdr_3addr *)buffer;
1060         if (length < offsetof(struct ieee80211_hdr_3addr, addr3))
1061                 return;
1062         if (compare_ether_addr(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid) != 0)
1063                 return;
1064
1065         spin_lock_irqsave(&mac->lock, flags);
1066         i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE;
1067         mac->qual_buffer[i] = qual_percent;
1068         mac->rssi_buffer[i] = rssi_percent;
1069         mac->stats_count++;
1070         spin_unlock_irqrestore(&mac->lock, flags);
1071 }
1072
1073 static int fill_rx_stats(struct ieee80211_rx_stats *stats,
1074                          const struct rx_status **pstatus,
1075                          struct zd_mac *mac,
1076                          const u8 *buffer, unsigned int length)
1077 {
1078         const struct rx_status *status;
1079
1080         *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status));
1081         if (status->frame_status & ZD_RX_ERROR) {
1082                 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1083                 ieee->stats.rx_errors++;
1084                 if (status->frame_status & ZD_RX_TIMEOUT_ERROR)
1085                         ieee->stats.rx_missed_errors++;
1086                 else if (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR)
1087                         ieee->stats.rx_fifo_errors++;
1088                 else if (status->frame_status & ZD_RX_DECRYPTION_ERROR)
1089                         ieee->ieee_stats.rx_discards_undecryptable++;
1090                 else if (status->frame_status & ZD_RX_CRC32_ERROR) {
1091                         ieee->stats.rx_crc_errors++;
1092                         ieee->ieee_stats.rx_fcs_errors++;
1093                 }
1094                 else if (status->frame_status & ZD_RX_CRC16_ERROR)
1095                         ieee->stats.rx_crc_errors++;
1096                 return -EINVAL;
1097         }
1098
1099         memset(stats, 0, sizeof(struct ieee80211_rx_stats));
1100         stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
1101                                + sizeof(struct rx_status));
1102         /* FIXME: 802.11a */
1103         stats->freq = IEEE80211_24GHZ_BAND;
1104         stats->received_channel = _zd_chip_get_channel(&mac->chip);
1105         stats->rssi = zd_rx_strength_percent(status->signal_strength);
1106         stats->signal = zd_rx_qual_percent(buffer,
1107                                           length - sizeof(struct rx_status),
1108                                           status);
1109         stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
1110         stats->rate = zd_rx_rate(buffer, status);
1111         if (stats->rate)
1112                 stats->mask |= IEEE80211_STATMASK_RATE;
1113
1114         return 0;
1115 }
1116
1117 static void zd_mac_rx(struct zd_mac *mac, struct sk_buff *skb)
1118 {
1119         int r;
1120         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1121         struct ieee80211_rx_stats stats;
1122         const struct rx_status *status;
1123
1124         if (skb->len < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
1125                        IEEE80211_FCS_LEN + sizeof(struct rx_status))
1126         {
1127                 ieee->stats.rx_errors++;
1128                 ieee->stats.rx_length_errors++;
1129                 goto free_skb;
1130         }
1131
1132         r = fill_rx_stats(&stats, &status, mac, skb->data, skb->len);
1133         if (r) {
1134                 /* Only packets with rx errors are included here.
1135                  * The error stats have already been set in fill_rx_stats.
1136                  */
1137                 goto free_skb;
1138         }
1139
1140         __skb_pull(skb, ZD_PLCP_HEADER_SIZE);
1141         __skb_trim(skb, skb->len -
1142                         (IEEE80211_FCS_LEN + sizeof(struct rx_status)));
1143
1144         update_qual_rssi(mac, skb->data, skb->len, stats.signal,
1145                          status->signal_strength);
1146
1147         r = filter_rx(ieee, skb->data, skb->len, &stats);
1148         if (r <= 0) {
1149                 if (r < 0) {
1150                         ieee->stats.rx_errors++;
1151                         dev_dbg_f(zd_mac_dev(mac), "Error in packet.\n");
1152                 }
1153                 goto free_skb;
1154         }
1155
1156         if (ieee->iw_mode == IW_MODE_MONITOR)
1157                 fill_rt_header(skb_push(skb, sizeof(struct zd_rt_hdr)), mac,
1158                                &stats, status);
1159
1160         r = ieee80211_rx(ieee, skb, &stats);
1161         if (r)
1162                 return;
1163 free_skb:
1164         /* We are always in a soft irq. */
1165         dev_kfree_skb(skb);
1166 }
1167
1168 static void do_rx(unsigned long mac_ptr)
1169 {
1170         struct zd_mac *mac = (struct zd_mac *)mac_ptr;
1171         struct sk_buff *skb;
1172
1173         while ((skb = skb_dequeue(&mac->rx_queue)) != NULL)
1174                 zd_mac_rx(mac, skb);
1175 }
1176
1177 int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length)
1178 {
1179         struct sk_buff *skb;
1180
1181         skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
1182         if (!skb) {
1183                 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1184                 dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n");
1185                 ieee->stats.rx_dropped++;
1186                 return -ENOMEM;
1187         }
1188         skb_reserve(skb, sizeof(struct zd_rt_hdr));
1189         memcpy(__skb_put(skb, length), buffer, length);
1190         skb_queue_tail(&mac->rx_queue, skb);
1191         tasklet_schedule(&mac->rx_tasklet);
1192         return 0;
1193 }
1194
1195 static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
1196                      int pri)
1197 {
1198         return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
1199 }
1200
1201 static void set_security(struct net_device *netdev,
1202                          struct ieee80211_security *sec)
1203 {
1204         struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
1205         struct ieee80211_security *secinfo = &ieee->sec;
1206         int keyidx;
1207
1208         dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
1209
1210         for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
1211                 if (sec->flags & (1<<keyidx)) {
1212                         secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
1213                         secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
1214                         memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
1215                                SCM_KEY_LEN);
1216                 }
1217
1218         if (sec->flags & SEC_ACTIVE_KEY) {
1219                 secinfo->active_key = sec->active_key;
1220                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1221                         "   .active_key = %d\n", sec->active_key);
1222         }
1223         if (sec->flags & SEC_UNICAST_GROUP) {
1224                 secinfo->unicast_uses_group = sec->unicast_uses_group;
1225                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1226                         "   .unicast_uses_group = %d\n",
1227                         sec->unicast_uses_group);
1228         }
1229         if (sec->flags & SEC_LEVEL) {
1230                 secinfo->level = sec->level;
1231                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1232                         "   .level = %d\n", sec->level);
1233         }
1234         if (sec->flags & SEC_ENABLED) {
1235                 secinfo->enabled = sec->enabled;
1236                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1237                         "   .enabled = %d\n", sec->enabled);
1238         }
1239         if (sec->flags & SEC_ENCRYPT) {
1240                 secinfo->encrypt = sec->encrypt;
1241                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1242                         "   .encrypt = %d\n", sec->encrypt);
1243         }
1244         if (sec->flags & SEC_AUTH_MODE) {
1245                 secinfo->auth_mode = sec->auth_mode;
1246                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1247                         "   .auth_mode = %d\n", sec->auth_mode);
1248         }
1249 }
1250
1251 static void ieee_init(struct ieee80211_device *ieee)
1252 {
1253         ieee->mode = IEEE_B | IEEE_G;
1254         ieee->freq_band = IEEE80211_24GHZ_BAND;
1255         ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
1256         ieee->tx_headroom = sizeof(struct zd_ctrlset);
1257         ieee->set_security = set_security;
1258         ieee->hard_start_xmit = netdev_tx;
1259
1260         /* Software encryption/decryption for now */
1261         ieee->host_build_iv = 0;
1262         ieee->host_encrypt = 1;
1263         ieee->host_decrypt = 1;
1264
1265         /* FIXME: default to managed mode, until ieee80211 and zd1211rw can
1266          * correctly support AUTO */
1267         ieee->iw_mode = IW_MODE_INFRA;
1268 }
1269
1270 static void softmac_init(struct ieee80211softmac_device *sm)
1271 {
1272         sm->set_channel = set_channel;
1273         sm->bssinfo_change = bssinfo_change;
1274 }
1275
1276 struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
1277 {
1278         struct zd_mac *mac = zd_netdev_mac(ndev);
1279         struct iw_statistics *iw_stats = &mac->iw_stats;
1280         unsigned int i, count, qual_total, rssi_total;
1281
1282         memset(iw_stats, 0, sizeof(struct iw_statistics));
1283         /* We are not setting the status, because ieee->state is not updated
1284          * at all and this driver doesn't track authentication state.
1285          */
1286         spin_lock_irq(&mac->lock);
1287         count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ?
1288                 mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE;
1289         qual_total = rssi_total = 0;
1290         for (i = 0; i < count; i++) {
1291                 qual_total += mac->qual_buffer[i];
1292                 rssi_total += mac->rssi_buffer[i];
1293         }
1294         spin_unlock_irq(&mac->lock);
1295         iw_stats->qual.updated = IW_QUAL_NOISE_INVALID;
1296         if (count > 0) {
1297                 iw_stats->qual.qual = qual_total / count;
1298                 iw_stats->qual.level = rssi_total / count;
1299                 iw_stats->qual.updated |=
1300                         IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED;
1301         } else {
1302                 iw_stats->qual.updated |=
1303                         IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID;
1304         }
1305         /* TODO: update counter */
1306         return iw_stats;
1307 }
1308
1309 #define LINK_LED_WORK_DELAY HZ
1310
1311 static void link_led_handler(struct work_struct *work)
1312 {
1313         struct zd_mac *mac =
1314                 container_of(work, struct zd_mac, housekeeping.link_led_work.work);
1315         struct zd_chip *chip = &mac->chip;
1316         struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev);
1317         int is_associated;
1318         int r;
1319
1320         spin_lock_irq(&mac->lock);
1321         is_associated = sm->associnfo.associated != 0;
1322         spin_unlock_irq(&mac->lock);
1323
1324         r = zd_chip_control_leds(chip,
1325                                  is_associated ? LED_ASSOCIATED : LED_SCANNING);
1326         if (r)
1327                 dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
1328
1329         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1330                            LINK_LED_WORK_DELAY);
1331 }
1332
1333 static void housekeeping_init(struct zd_mac *mac)
1334 {
1335         INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
1336 }
1337
1338 static void housekeeping_enable(struct zd_mac *mac)
1339 {
1340         dev_dbg_f(zd_mac_dev(mac), "\n");
1341         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1342                            0);
1343 }
1344
1345 static void housekeeping_disable(struct zd_mac *mac)
1346 {
1347         dev_dbg_f(zd_mac_dev(mac), "\n");
1348         cancel_rearming_delayed_workqueue(zd_workqueue,
1349                 &mac->housekeeping.link_led_work);
1350         zd_chip_control_leds(&mac->chip, LED_OFF);
1351 }