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                 /* The vendor driver overrides the regulatory domain and
 117                  * allowed channel registers and unconditionally restricts
 118                  * available channels to 1-11 everywhere. Match their
 119                  * questionable behaviour only for regdomains which we don't
 120                  * recognise. */
 121                 dev_warn(zd_mac_dev(mac),  "Unrecognised regulatory domain: "
 122                         "%#04x. Defaulting to FCC.\n", default_regdomain);
 123                 default_regdomain = ZD_REGDOMAIN_FCC;
 124         }
 125         spin_lock_irq(&mac->lock);
 126         mac->regdomain = mac->default_regdomain = default_regdomain;
 127         spin_unlock_irq(&mac->lock);
 128         r = reset_channel(mac);
 129         if (r)
 130                 goto disable_int;
 131
 132         /* We must inform the device that we are doing encryption/decryption in
 133          * software at the moment. */
 134         r = zd_set_encryption_type(chip, ENC_SNIFFER);
 135         if (r)
 136                 goto disable_int;
 137
 138         r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
 139         if (r)
 140                 goto disable_int;
 141
 142         r = 0;
 143 disable_int:
 144         zd_chip_disable_int(chip);
 145 out:
 146         return r;
 147 }
 148
 149 void zd_mac_clear(struct zd_mac *mac)
 150 {
 151         flush_workqueue(zd_workqueue);
 152         skb_queue_purge(&mac->rx_queue);
 153         tasklet_kill(&mac->rx_tasklet);
 154         zd_chip_clear(&mac->chip);
 155         ZD_ASSERT(!spin_is_locked(&mac->lock));
 156         ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
 157 }
 158
 159 static int reset_mode(struct zd_mac *mac)
 160 {
 161         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 162         u32 filter = (ieee->iw_mode == IW_MODE_MONITOR) ? ~0 : STA_RX_FILTER;
 163         return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter);
 164 }
 165
 166 int zd_mac_open(struct net_device *netdev)
 167 {
 168         struct zd_mac *mac = zd_netdev_mac(netdev);
 169         struct zd_chip *chip = &mac->chip;
 170         int r;
 171
 172         tasklet_enable(&mac->rx_tasklet);
 173
 174         r = zd_chip_enable_int(chip);
 175         if (r < 0)
 176                 goto out;
 177
 178         r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
 179         if (r < 0)
 180                 goto disable_int;
 181         r = reset_mode(mac);
 182         if (r)
 183                 goto disable_int;
 184         r = zd_chip_switch_radio_on(chip);
 185         if (r < 0)
 186                 goto disable_int;
 187         r = zd_chip_set_channel(chip, mac->requested_channel);
 188         if (r < 0)
 189                 goto disable_radio;
 190         r = zd_chip_enable_rx(chip);
 191         if (r < 0)
 192                 goto disable_radio;
 193         r = zd_chip_enable_hwint(chip);
 194         if (r < 0)
 195                 goto disable_rx;
 196
 197         housekeeping_enable(mac);
 198         ieee80211softmac_start(netdev);
 199         return 0;
 200 disable_rx:
 201         zd_chip_disable_rx(chip);
 202 disable_radio:
 203         zd_chip_switch_radio_off(chip);
 204 disable_int:
 205         zd_chip_disable_int(chip);
 206 out:
 207         return r;
 208 }
 209
 210 int zd_mac_stop(struct net_device *netdev)
 211 {
 212         struct zd_mac *mac = zd_netdev_mac(netdev);
 213         struct zd_chip *chip = &mac->chip;
 214
 215         netif_stop_queue(netdev);
 216
 217         /*
 218          * The order here deliberately is a little different from the open()
 219          * method, since we need to make sure there is no opportunity for RX
 220          * frames to be processed by softmac after we have stopped it.
 221          */
 222
 223         zd_chip_disable_rx(chip);
 224         skb_queue_purge(&mac->rx_queue);
 225         tasklet_disable(&mac->rx_tasklet);
 226         housekeeping_disable(mac);
 227         ieee80211softmac_stop(netdev);
 228
 229         /* Ensure no work items are running or queued from this point */
 230         cancel_delayed_work(&mac->set_rts_cts_work);
 231         cancel_delayed_work(&mac->set_basic_rates_work);
 232         flush_workqueue(zd_workqueue);
 233         mac->updating_rts_rate = 0;
 234         mac->updating_basic_rates = 0;
 235
 236         zd_chip_disable_hwint(chip);
 237         zd_chip_switch_radio_off(chip);
 238         zd_chip_disable_int(chip);
 239
 240         return 0;
 241 }
 242
 243 int zd_mac_set_mac_address(struct net_device *netdev, void *p)
 244 {
 245         int r;
 246         unsigned long flags;
 247         struct sockaddr *addr = p;
 248         struct zd_mac *mac = zd_netdev_mac(netdev);
 249         struct zd_chip *chip = &mac->chip;
 250
 251         if (!is_valid_ether_addr(addr->sa_data))
 252                 return -EADDRNOTAVAIL;
 253
 254         dev_dbg_f(zd_mac_dev(mac),
 255                   "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data));
 256
 257         r = zd_write_mac_addr(chip, addr->sa_data);
 258         if (r)
 259                 return r;
 260
 261         spin_lock_irqsave(&mac->lock, flags);
 262         memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
 263         spin_unlock_irqrestore(&mac->lock, flags);
 264
 265         return 0;
 266 }
 267
 268 static void set_multicast_hash_handler(struct work_struct *work)
 269 {
 270         struct zd_mac *mac = container_of(work, struct zd_mac,
 271                                           set_multicast_hash_work);
 272         struct zd_mc_hash hash;
 273
 274         spin_lock_irq(&mac->lock);
 275         hash = mac->multicast_hash;
 276         spin_unlock_irq(&mac->lock);
 277
 278         zd_chip_set_multicast_hash(&mac->chip, &hash);
 279 }
 280
 281 void zd_mac_set_multicast_list(struct net_device *dev)
 282 {
 283         struct zd_mc_hash hash;
 284         struct zd_mac *mac = zd_netdev_mac(dev);
 285         struct dev_mc_list *mc;
 286         unsigned long flags;
 287
 288         if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
 289                 zd_mc_add_all(&hash);
 290         } else {
 291                 zd_mc_clear(&hash);
 292                 for (mc = dev->mc_list; mc; mc = mc->next) {
 293                         dev_dbg_f(zd_mac_dev(mac), "mc addr " MAC_FMT "\n",
 294                                   MAC_ARG(mc->dmi_addr));
 295                         zd_mc_add_addr(&hash, mc->dmi_addr);
 296                 }
 297         }
 298
 299         spin_lock_irqsave(&mac->lock, flags);
 300         mac->multicast_hash = hash;
 301         spin_unlock_irqrestore(&mac->lock, flags);
 302         queue_work(zd_workqueue, &mac->set_multicast_hash_work);
 303 }
 304
 305 int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
 306 {
 307         int r;
 308         u8 channel;
 309
 310         ZD_ASSERT(!irqs_disabled());
 311         spin_lock_irq(&mac->lock);
 312         if (regdomain == 0) {
 313                 regdomain = mac->default_regdomain;
 314         }
 315         if (!zd_regdomain_supported(regdomain)) {
 316                 spin_unlock_irq(&mac->lock);
 317                 return -EINVAL;
 318         }
 319         mac->regdomain = regdomain;
 320         channel = mac->requested_channel;
 321         spin_unlock_irq(&mac->lock);
 322
 323         r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
 324         if (r)
 325                 return r;
 326         if (!zd_regdomain_supports_channel(regdomain, channel)) {
 327                 r = reset_channel(mac);
 328                 if (r)
 329                         return r;
 330         }
 331
 332         return 0;
 333 }
 334
 335 u8 zd_mac_get_regdomain(struct zd_mac *mac)
 336 {
 337         unsigned long flags;
 338         u8 regdomain;
 339
 340         spin_lock_irqsave(&mac->lock, flags);
 341         regdomain = mac->regdomain;
 342         spin_unlock_irqrestore(&mac->lock, flags);
 343         return regdomain;
 344 }
 345
 346 /* Fallback to lowest rate, if rate is unknown. */
 347 static u8 rate_to_zd_rate(u8 rate)
 348 {
 349         switch (rate) {
 350         case IEEE80211_CCK_RATE_2MB:
 351                 return ZD_CCK_RATE_2M;
 352         case IEEE80211_CCK_RATE_5MB:
 353                 return ZD_CCK_RATE_5_5M;
 354         case IEEE80211_CCK_RATE_11MB:
 355                 return ZD_CCK_RATE_11M;
 356         case IEEE80211_OFDM_RATE_6MB:
 357                 return ZD_OFDM_RATE_6M;
 358         case IEEE80211_OFDM_RATE_9MB:
 359                 return ZD_OFDM_RATE_9M;
 360         case IEEE80211_OFDM_RATE_12MB:
 361                 return ZD_OFDM_RATE_12M;
 362         case IEEE80211_OFDM_RATE_18MB:
 363                 return ZD_OFDM_RATE_18M;
 364         case IEEE80211_OFDM_RATE_24MB:
 365                 return ZD_OFDM_RATE_24M;
 366         case IEEE80211_OFDM_RATE_36MB:
 367                 return ZD_OFDM_RATE_36M;
 368         case IEEE80211_OFDM_RATE_48MB:
 369                 return ZD_OFDM_RATE_48M;
 370         case IEEE80211_OFDM_RATE_54MB:
 371                 return ZD_OFDM_RATE_54M;
 372         }
 373         return ZD_CCK_RATE_1M;
 374 }
 375
 376 static u16 rate_to_cr_rate(u8 rate)
 377 {
 378         switch (rate) {
 379         case IEEE80211_CCK_RATE_2MB:
 380                 return CR_RATE_1M;
 381         case IEEE80211_CCK_RATE_5MB:
 382                 return CR_RATE_5_5M;
 383         case IEEE80211_CCK_RATE_11MB:
 384                 return CR_RATE_11M;
 385         case IEEE80211_OFDM_RATE_6MB:
 386                 return CR_RATE_6M;
 387         case IEEE80211_OFDM_RATE_9MB:
 388                 return CR_RATE_9M;
 389         case IEEE80211_OFDM_RATE_12MB:
 390                 return CR_RATE_12M;
 391         case IEEE80211_OFDM_RATE_18MB:
 392                 return CR_RATE_18M;
 393         case IEEE80211_OFDM_RATE_24MB:
 394                 return CR_RATE_24M;
 395         case IEEE80211_OFDM_RATE_36MB:
 396                 return CR_RATE_36M;
 397         case IEEE80211_OFDM_RATE_48MB:
 398                 return CR_RATE_48M;
 399         case IEEE80211_OFDM_RATE_54MB:
 400                 return CR_RATE_54M;
 401         }
 402         return CR_RATE_1M;
 403 }
 404
 405 static void try_enable_tx(struct zd_mac *mac)
 406 {
 407         unsigned long flags;
 408
 409         spin_lock_irqsave(&mac->lock, flags);
 410         if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
 411                 netif_wake_queue(mac->netdev);
 412         spin_unlock_irqrestore(&mac->lock, flags);
 413 }
 414
 415 static void set_rts_cts_work(struct work_struct *work)
 416 {
 417         struct zd_mac *mac =
 418                 container_of(work, struct zd_mac, set_rts_cts_work.work);
 419         unsigned long flags;
 420         u8 rts_rate;
 421         unsigned int short_preamble;
 422
 423         mutex_lock(&mac->chip.mutex);
 424
 425         spin_lock_irqsave(&mac->lock, flags);
 426         mac->updating_rts_rate = 0;
 427         rts_rate = mac->rts_rate;
 428         short_preamble = mac->short_preamble;
 429         spin_unlock_irqrestore(&mac->lock, flags);
 430
 431         zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
 432         mutex_unlock(&mac->chip.mutex);
 433
 434         try_enable_tx(mac);
 435 }
 436
 437 static void set_basic_rates_work(struct work_struct *work)
 438 {
 439         struct zd_mac *mac =
 440                 container_of(work, struct zd_mac, set_basic_rates_work.work);
 441         unsigned long flags;
 442         u16 basic_rates;
 443
 444         mutex_lock(&mac->chip.mutex);
 445
 446         spin_lock_irqsave(&mac->lock, flags);
 447         mac->updating_basic_rates = 0;
 448         basic_rates = mac->basic_rates;
 449         spin_unlock_irqrestore(&mac->lock, flags);
 450
 451         zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
 452         mutex_unlock(&mac->chip.mutex);
 453
 454         try_enable_tx(mac);
 455 }
 456
 457 static void bssinfo_change(struct net_device *netdev, u32 changes)
 458 {
 459         struct zd_mac *mac = zd_netdev_mac(netdev);
 460         struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
 461         struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
 462         int need_set_rts_cts = 0;
 463         int need_set_rates = 0;
 464         u16 basic_rates;
 465         unsigned long flags;
 466
 467         dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
 468
 469         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
 470                 spin_lock_irqsave(&mac->lock, flags);
 471                 mac->short_preamble = bssinfo->short_preamble;
 472                 spin_unlock_irqrestore(&mac->lock, flags);
 473                 need_set_rts_cts = 1;
 474         }
 475
 476         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
 477                 /* Set RTS rate to highest available basic rate */
 478                 u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac,
 479                         &bssinfo->supported_rates, 1);
 480                 hi_rate = rate_to_zd_rate(hi_rate);
 481
 482                 spin_lock_irqsave(&mac->lock, flags);
 483                 if (hi_rate != mac->rts_rate) {
 484                         mac->rts_rate = hi_rate;
 485                         need_set_rts_cts = 1;
 486                 }
 487                 spin_unlock_irqrestore(&mac->lock, flags);
 488
 489                 /* Set basic rates */
 490                 need_set_rates = 1;
 491                 if (bssinfo->supported_rates.count == 0) {
 492                         /* Allow the device to be flexible */
 493                         basic_rates = CR_RATES_80211B | CR_RATES_80211G;
 494                 } else {
 495                         int i = 0;
 496                         basic_rates = 0;
 497
 498                         for (i = 0; i < bssinfo->supported_rates.count; i++) {
 499                                 u16 rate = bssinfo->supported_rates.rates[i];
 500                                 if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
 501                                         continue;
 502
 503                                 rate &= ~IEEE80211_BASIC_RATE_MASK;
 504                                 basic_rates |= rate_to_cr_rate(rate);
 505                         }
 506                 }
 507                 spin_lock_irqsave(&mac->lock, flags);
 508                 mac->basic_rates = basic_rates;
 509                 spin_unlock_irqrestore(&mac->lock, flags);
 510         }
 511
 512         /* Schedule any changes we made above */
 513
 514         spin_lock_irqsave(&mac->lock, flags);
 515         if (need_set_rts_cts && !mac->updating_rts_rate) {
 516                 mac->updating_rts_rate = 1;
 517                 netif_stop_queue(mac->netdev);
 518                 queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0);
 519         }
 520         if (need_set_rates && !mac->updating_basic_rates) {
 521                 mac->updating_basic_rates = 1;
 522                 netif_stop_queue(mac->netdev);
 523                 queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work,
 524                                    0);
 525         }
 526         spin_unlock_irqrestore(&mac->lock, flags);
 527 }
 528
 529 static void set_channel(struct net_device *netdev, u8 channel)
 530 {
 531         struct zd_mac *mac = zd_netdev_mac(netdev);
 532
 533         dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
 534
 535         zd_chip_set_channel(&mac->chip, channel);
 536 }
 537
 538 int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
 539 {
 540         unsigned long lock_flags;
 541         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 542
 543         if (ieee->iw_mode == IW_MODE_INFRA)
 544                 return -EPERM;
 545
 546         spin_lock_irqsave(&mac->lock, lock_flags);
 547         if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
 548                 spin_unlock_irqrestore(&mac->lock, lock_flags);
 549                 return -EINVAL;
 550         }
 551         mac->requested_channel = channel;
 552         spin_unlock_irqrestore(&mac->lock, lock_flags);
 553         if (netif_running(mac->netdev))
 554                 return zd_chip_set_channel(&mac->chip, channel);
 555         else
 556                 return 0;
 557 }
 558
 559 u8 zd_mac_get_channel(struct zd_mac *mac)
 560 {
 561         u8 channel = zd_chip_get_channel(&mac->chip);
 562
 563         dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel);
 564         return channel;
 565 }
 566
 567 /* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
 568 static u8 zd_rate_typed(u8 zd_rate)
 569 {
 570         static const u8 typed_rates[16] = {
 571                 [ZD_CCK_RATE_1M]        = ZD_CS_CCK|ZD_CCK_RATE_1M,
 572                 [ZD_CCK_RATE_2M]        = ZD_CS_CCK|ZD_CCK_RATE_2M,
 573                 [ZD_CCK_RATE_5_5M]      = ZD_CS_CCK|ZD_CCK_RATE_5_5M,
 574                 [ZD_CCK_RATE_11M]       = ZD_CS_CCK|ZD_CCK_RATE_11M,
 575                 [ZD_OFDM_RATE_6M]       = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
 576                 [ZD_OFDM_RATE_9M]       = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
 577                 [ZD_OFDM_RATE_12M]      = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
 578                 [ZD_OFDM_RATE_18M]      = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
 579                 [ZD_OFDM_RATE_24M]      = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
 580                 [ZD_OFDM_RATE_36M]      = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
 581                 [ZD_OFDM_RATE_48M]      = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
 582                 [ZD_OFDM_RATE_54M]      = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
 583         };
 584
 585         ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
 586         return typed_rates[zd_rate & ZD_CS_RATE_MASK];
 587 }
 588
 589 int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
 590 {
 591         struct ieee80211_device *ieee;
 592
 593         switch (mode) {
 594         case IW_MODE_AUTO:
 595         case IW_MODE_ADHOC:
 596         case IW_MODE_INFRA:
 597                 mac->netdev->type = ARPHRD_ETHER;
 598                 break;
 599         case IW_MODE_MONITOR:
 600                 mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
 601                 break;
 602         default:
 603                 dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
 604                 return -EINVAL;
 605         }
 606
 607         ieee = zd_mac_to_ieee80211(mac);
 608         ZD_ASSERT(!irqs_disabled());
 609         spin_lock_irq(&ieee->lock);
 610         ieee->iw_mode = mode;
 611         spin_unlock_irq(&ieee->lock);
 612
 613         if (netif_running(mac->netdev))
 614                 return reset_mode(mac);
 615
 616         return 0;
 617 }
 618
 619 int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
 620 {
 621         unsigned long flags;
 622         struct ieee80211_device *ieee;
 623
 624         ieee = zd_mac_to_ieee80211(mac);
 625         spin_lock_irqsave(&ieee->lock, flags);
 626         *mode = ieee->iw_mode;
 627         spin_unlock_irqrestore(&ieee->lock, flags);
 628         return 0;
 629 }
 630
 631 int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
 632 {
 633         int i;
 634         const struct channel_range *channel_range;
 635         u8 regdomain;
 636
 637         memset(range, 0, sizeof(*range));
 638
 639         /* FIXME: Not so important and depends on the mode. For 802.11g
 640          * usually this value is used. It seems to be that Bit/s number is
 641          * given here.
 642          */
 643         range->throughput = 27 * 1000 * 1000;
 644
 645         range->max_qual.qual = 100;
 646         range->max_qual.level = 100;
 647
 648         /* FIXME: Needs still to be tuned. */
 649         range->avg_qual.qual = 71;
 650         range->avg_qual.level = 80;
 651
 652         /* FIXME: depends on standard? */
 653         range->min_rts = 256;
 654         range->max_rts = 2346;
 655
 656         range->min_frag = MIN_FRAG_THRESHOLD;
 657         range->max_frag = MAX_FRAG_THRESHOLD;
 658
 659         range->max_encoding_tokens = WEP_KEYS;
 660         range->num_encoding_sizes = 2;
 661         range->encoding_size[0] = 5;
 662         range->encoding_size[1] = WEP_KEY_LEN;
 663
 664         range->we_version_compiled = WIRELESS_EXT;
 665         range->we_version_source = 20;
 666
 667         range->enc_capa = IW_ENC_CAPA_WPA |  IW_ENC_CAPA_WPA2 |
 668                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
 669
 670         ZD_ASSERT(!irqs_disabled());
 671         spin_lock_irq(&mac->lock);
 672         regdomain = mac->regdomain;
 673         spin_unlock_irq(&mac->lock);
 674         channel_range = zd_channel_range(regdomain);
 675
 676         range->num_channels = channel_range->end - channel_range->start;
 677         range->old_num_channels = range->num_channels;
 678         range->num_frequency = range->num_channels;
 679         range->old_num_frequency = range->num_frequency;
 680
 681         for (i = 0; i < range->num_frequency; i++) {
 682                 struct iw_freq *freq = &range->freq[i];
 683                 freq->i = channel_range->start + i;
 684                 zd_channel_to_freq(freq, freq->i);
 685         }
 686
 687         return 0;
 688 }
 689
 690 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
 691 {
 692         static const u8 rate_divisor[] = {
 693                 [ZD_CCK_RATE_1M]        =  1,
 694                 [ZD_CCK_RATE_2M]        =  2,
 695                 [ZD_CCK_RATE_5_5M]      = 11, /* bits must be doubled */
 696                 [ZD_CCK_RATE_11M]       = 11,
 697                 [ZD_OFDM_RATE_6M]       =  6,
 698                 [ZD_OFDM_RATE_9M]       =  9,
 699                 [ZD_OFDM_RATE_12M]      = 12,
 700                 [ZD_OFDM_RATE_18M]      = 18,
 701                 [ZD_OFDM_RATE_24M]      = 24,
 702                 [ZD_OFDM_RATE_36M]      = 36,
 703                 [ZD_OFDM_RATE_48M]      = 48,
 704                 [ZD_OFDM_RATE_54M]      = 54,
 705         };
 706
 707         u32 bits = (u32)tx_length * 8;
 708         u32 divisor;
 709
 710         divisor = rate_divisor[zd_rate];
 711         if (divisor == 0)
 712                 return -EINVAL;
 713
 714         switch (zd_rate) {
 715         case ZD_CCK_RATE_5_5M:
 716                 bits = (2*bits) + 10; /* round up to the next integer */
 717                 break;
 718         case ZD_CCK_RATE_11M:
 719                 if (service) {
 720                         u32 t = bits % 11;
 721                         *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
 722                         if (0 < t && t <= 3) {
 723                                 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
 724                         }
 725                 }
 726                 bits += 10; /* round up to the next integer */
 727                 break;
 728         }
 729
 730         return bits/divisor;
 731 }
 732
 733 enum {
 734         R2M_SHORT_PREAMBLE = 0x01,
 735         R2M_11A            = 0x02,
 736 };
 737
 738 static u8 zd_rate_to_modulation(u8 zd_rate, int flags)
 739 {
 740         u8 modulation;
 741
 742         modulation = zd_rate_typed(zd_rate);
 743         if (flags & R2M_SHORT_PREAMBLE) {
 744                 switch (ZD_CS_RATE(modulation)) {
 745                 case ZD_CCK_RATE_2M:
 746                 case ZD_CCK_RATE_5_5M:
 747                 case ZD_CCK_RATE_11M:
 748                         modulation |= ZD_CS_CCK_PREA_SHORT;
 749                         return modulation;
 750                 }
 751         }
 752         if (flags & R2M_11A) {
 753                 if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM)
 754                         modulation |= ZD_CS_OFDM_MODE_11A;
 755         }
 756         return modulation;
 757 }
 758
 759 static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
 760                               struct ieee80211_hdr_4addr *hdr)
 761 {
 762         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
 763         u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
 764         u8 rate, zd_rate;
 765         int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
 766         int is_multicast = is_multicast_ether_addr(hdr->addr1);
 767         int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
 768                 is_multicast, is_mgt);
 769         int flags = 0;
 770
 771         /* FIXME: 802.11a? */
 772         rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
 773
 774         if (short_preamble)
 775                 flags |= R2M_SHORT_PREAMBLE;
 776
 777         zd_rate = rate_to_zd_rate(rate);
 778         cs->modulation = zd_rate_to_modulation(zd_rate, flags);
 779 }
 780
 781 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
 782                            struct ieee80211_hdr_4addr *header)
 783 {
 784         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
 785         unsigned int tx_length = le16_to_cpu(cs->tx_length);
 786         u16 fctl = le16_to_cpu(header->frame_ctl);
 787         u16 ftype = WLAN_FC_GET_TYPE(fctl);
 788         u16 stype = WLAN_FC_GET_STYPE(fctl);
 789
 790         /*
 791          * CONTROL TODO:
 792          * - if backoff needed, enable bit 0
 793          * - if burst (backoff not needed) disable bit 0
 794          */
 795
 796         cs->control = 0;
 797
 798         /* First fragment */
 799         if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0)
 800                 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
 801
 802         /* Multicast */
 803         if (is_multicast_ether_addr(header->addr1))
 804                 cs->control |= ZD_CS_MULTICAST;
 805
 806         /* PS-POLL */
 807         if (stype == IEEE80211_STYPE_PSPOLL)
 808                 cs->control |= ZD_CS_PS_POLL_FRAME;
 809
 810         /* Unicast data frames over the threshold should have RTS */
 811         if (!is_multicast_ether_addr(header->addr1) &&
 812                 ftype != IEEE80211_FTYPE_MGMT &&
 813                     tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
 814                 cs->control |= ZD_CS_RTS;
 815
 816         /* Use CTS-to-self protection if required */
 817         if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM &&
 818                         ieee80211softmac_protection_needed(softmac)) {
 819                 /* FIXME: avoid sending RTS *and* self-CTS, is that correct? */
 820                 cs->control &= ~ZD_CS_RTS;
 821                 cs->control |= ZD_CS_SELF_CTS;
 822         }
 823
 824         /* FIXME: Management frame? */
 825 }
 826
 827 static int fill_ctrlset(struct zd_mac *mac,
 828                         struct ieee80211_txb *txb,
 829                         int frag_num)
 830 {
 831         int r;
 832         struct sk_buff *skb = txb->fragments[frag_num];
 833         struct ieee80211_hdr_4addr *hdr =
 834                 (struct ieee80211_hdr_4addr *) skb->data;
 835         unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
 836         unsigned int next_frag_len;
 837         unsigned int packet_length;
 838         struct zd_ctrlset *cs = (struct zd_ctrlset *)
 839                 skb_push(skb, sizeof(struct zd_ctrlset));
 840
 841         if (frag_num+1  < txb->nr_frags) {
 842                 next_frag_len = txb->fragments[frag_num+1]->len +
 843                                 IEEE80211_FCS_LEN;
 844         } else {
 845                 next_frag_len = 0;
 846         }
 847         ZD_ASSERT(frag_len <= 0xffff);
 848         ZD_ASSERT(next_frag_len <= 0xffff);
 849
 850         cs_set_modulation(mac, cs, hdr);
 851
 852         cs->tx_length = cpu_to_le16(frag_len);
 853
 854         cs_set_control(mac, cs, hdr);
 855
 856         packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
 857         ZD_ASSERT(packet_length <= 0xffff);
 858         /* ZD1211B: Computing the length difference this way, gives us
 859          * flexibility to compute the packet length.
 860          */
 861         cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ?
 862                         packet_length - frag_len : packet_length);
 863
 864         /*
 865          * CURRENT LENGTH:
 866          * - transmit frame length in microseconds
 867          * - seems to be derived from frame length
 868          * - see Cal_Us_Service() in zdinlinef.h
 869          * - if macp->bTxBurstEnable is enabled, then multiply by 4
 870          *  - bTxBurstEnable is never set in the vendor driver
 871          *
 872          * SERVICE:
 873          * - "for PLCP configuration"
 874          * - always 0 except in some situations at 802.11b 11M
 875          * - see line 53 of zdinlinef.h
 876          */
 877         cs->service = 0;
 878         r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
 879                                  le16_to_cpu(cs->tx_length));
 880         if (r < 0)
 881                 return r;
 882         cs->current_length = cpu_to_le16(r);
 883
 884         if (next_frag_len == 0) {
 885                 cs->next_frame_length = 0;
 886         } else {
 887                 r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
 888                                          next_frag_len);
 889                 if (r < 0)
 890                         return r;
 891                 cs->next_frame_length = cpu_to_le16(r);
 892         }
 893
 894         return 0;
 895 }
 896
 897 static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
 898 {
 899         int i, r;
 900         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 901
 902         for (i = 0; i < txb->nr_frags; i++) {
 903                 struct sk_buff *skb = txb->fragments[i];
 904
 905                 r = fill_ctrlset(mac, txb, i);
 906                 if (r) {
 907                         ieee->stats.tx_dropped++;
 908                         return r;
 909                 }
 910                 r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
 911                 if (r) {
 912                         ieee->stats.tx_dropped++;
 913                         return r;
 914                 }
 915         }
 916
 917         /* FIXME: shouldn't this be handled by the upper layers? */
 918         mac->netdev->trans_start = jiffies;
 919
 920         ieee80211_txb_free(txb);
 921         return 0;
 922 }
 923
 924 struct zd_rt_hdr {
 925         struct ieee80211_radiotap_header rt_hdr;
 926         u8  rt_flags;
 927         u8  rt_rate;
 928         u16 rt_channel;
 929         u16 rt_chbitmask;
 930 } __attribute__((packed));
 931
 932 static void fill_rt_header(void *buffer, struct zd_mac *mac,
 933                            const struct ieee80211_rx_stats *stats,
 934                            const struct rx_status *status)
 935 {
 936         struct zd_rt_hdr *hdr = buffer;
 937
 938         hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 939         hdr->rt_hdr.it_pad = 0;
 940         hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
 941         hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 942                                  (1 << IEEE80211_RADIOTAP_CHANNEL) |
 943                                  (1 << IEEE80211_RADIOTAP_RATE));
 944
 945         hdr->rt_flags = 0;
 946         if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
 947                 hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
 948
 949         hdr->rt_rate = stats->rate / 5;
 950
 951         /* FIXME: 802.11a */
 952         hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
 953                                              _zd_chip_get_channel(&mac->chip)));
 954         hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
 955                 ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
 956                 ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
 957 }
 958
 959 /* Returns 1 if the data packet is for us and 0 otherwise. */
 960 static int is_data_packet_for_us(struct ieee80211_device *ieee,
 961                                  struct ieee80211_hdr_4addr *hdr)
 962 {
 963         struct net_device *netdev = ieee->dev;
 964         u16 fc = le16_to_cpu(hdr->frame_ctl);
 965
 966         ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
 967
 968         switch (ieee->iw_mode) {
 969         case IW_MODE_ADHOC:
 970                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
 971                     compare_ether_addr(hdr->addr3, ieee->bssid) != 0)
 972                         return 0;
 973                 break;
 974         case IW_MODE_AUTO:
 975         case IW_MODE_INFRA:
 976                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
 977                     IEEE80211_FCTL_FROMDS ||
 978                     compare_ether_addr(hdr->addr2, ieee->bssid) != 0)
 979                         return 0;
 980                 break;
 981         default:
 982                 ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
 983                 return 0;
 984         }
 985
 986         return compare_ether_addr(hdr->addr1, netdev->dev_addr) == 0 ||
 987                (is_multicast_ether_addr(hdr->addr1) &&
 988                 compare_ether_addr(hdr->addr3, netdev->dev_addr) != 0) ||
 989                (netdev->flags & IFF_PROMISC);
 990 }
 991
 992 /* Filters received packets. The function returns 1 if the packet should be
 993  * forwarded to ieee80211_rx(). If the packet should be ignored the function
 994  * returns 0. If an invalid packet is found the function returns -EINVAL.
 995  *
 996  * The function calls ieee80211_rx_mgt() directly.
 997  *
 998  * It has been based on ieee80211_rx_any.
 999  */
1000 static int filter_rx(struct ieee80211_device *ieee,
1001                      const u8 *buffer, unsigned int length,
1002                      struct ieee80211_rx_stats *stats)
1003 {
1004         struct ieee80211_hdr_4addr *hdr;
1005         u16 fc;
1006
1007         if (ieee->iw_mode == IW_MODE_MONITOR)
1008                 return 1;
1009
1010         hdr = (struct ieee80211_hdr_4addr *)buffer;
1011         fc = le16_to_cpu(hdr->frame_ctl);
1012         if ((fc & IEEE80211_FCTL_VERS) != 0)
1013                 return -EINVAL;
1014
1015         switch (WLAN_FC_GET_TYPE(fc)) {
1016         case IEEE80211_FTYPE_MGMT:
1017                 if (length < sizeof(struct ieee80211_hdr_3addr))
1018                         return -EINVAL;
1019                 ieee80211_rx_mgt(ieee, hdr, stats);
1020                 return 0;
1021         case IEEE80211_FTYPE_CTL:
1022                 return 0;
1023         case IEEE80211_FTYPE_DATA:
1024                 /* Ignore invalid short buffers */
1025                 if (length < sizeof(struct ieee80211_hdr_3addr))
1026                         return -EINVAL;
1027                 return is_data_packet_for_us(ieee, hdr);
1028         }
1029
1030         return -EINVAL;
1031 }
1032
1033 static void update_qual_rssi(struct zd_mac *mac,
1034                              const u8 *buffer, unsigned int length,
1035                              u8 qual_percent, u8 rssi_percent)
1036 {
1037         unsigned long flags;
1038         struct ieee80211_hdr_3addr *hdr;
1039         int i;
1040
1041         hdr = (struct ieee80211_hdr_3addr *)buffer;
1042         if (length < offsetof(struct ieee80211_hdr_3addr, addr3))
1043                 return;
1044         if (compare_ether_addr(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid) != 0)
1045                 return;
1046
1047         spin_lock_irqsave(&mac->lock, flags);
1048         i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE;
1049         mac->qual_buffer[i] = qual_percent;
1050         mac->rssi_buffer[i] = rssi_percent;
1051         mac->stats_count++;
1052         spin_unlock_irqrestore(&mac->lock, flags);
1053 }
1054
1055 static int fill_rx_stats(struct ieee80211_rx_stats *stats,
1056                          const struct rx_status **pstatus,
1057                          struct zd_mac *mac,
1058                          const u8 *buffer, unsigned int length)
1059 {
1060         const struct rx_status *status;
1061
1062         *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status));
1063         if (status->frame_status & ZD_RX_ERROR) {
1064                 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1065                 ieee->stats.rx_errors++;
1066                 if (status->frame_status & ZD_RX_TIMEOUT_ERROR)
1067                         ieee->stats.rx_missed_errors++;
1068                 else if (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR)
1069                         ieee->stats.rx_fifo_errors++;
1070                 else if (status->frame_status & ZD_RX_DECRYPTION_ERROR)
1071                         ieee->ieee_stats.rx_discards_undecryptable++;
1072                 else if (status->frame_status & ZD_RX_CRC32_ERROR) {
1073                         ieee->stats.rx_crc_errors++;
1074                         ieee->ieee_stats.rx_fcs_errors++;
1075                 }
1076                 else if (status->frame_status & ZD_RX_CRC16_ERROR)
1077                         ieee->stats.rx_crc_errors++;
1078                 return -EINVAL;
1079         }
1080
1081         memset(stats, 0, sizeof(struct ieee80211_rx_stats));
1082         stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
1083                                + sizeof(struct rx_status));
1084         /* FIXME: 802.11a */
1085         stats->freq = IEEE80211_24GHZ_BAND;
1086         stats->received_channel = _zd_chip_get_channel(&mac->chip);
1087         stats->rssi = zd_rx_strength_percent(status->signal_strength);
1088         stats->signal = zd_rx_qual_percent(buffer,
1089                                           length - sizeof(struct rx_status),
1090                                           status);
1091         stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
1092         stats->rate = zd_rx_rate(buffer, status);
1093         if (stats->rate)
1094                 stats->mask |= IEEE80211_STATMASK_RATE;
1095
1096         return 0;
1097 }
1098
1099 static void zd_mac_rx(struct zd_mac *mac, struct sk_buff *skb)
1100 {
1101         int r;
1102         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1103         struct ieee80211_rx_stats stats;
1104         const struct rx_status *status;
1105
1106         if (skb->len < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
1107                        IEEE80211_FCS_LEN + sizeof(struct rx_status))
1108         {
1109                 ieee->stats.rx_errors++;
1110                 ieee->stats.rx_length_errors++;
1111                 goto free_skb;
1112         }
1113
1114         r = fill_rx_stats(&stats, &status, mac, skb->data, skb->len);
1115         if (r) {
1116                 /* Only packets with rx errors are included here.
1117                  * The error stats have already been set in fill_rx_stats.
1118                  */
1119                 goto free_skb;
1120         }
1121
1122         __skb_pull(skb, ZD_PLCP_HEADER_SIZE);
1123         __skb_trim(skb, skb->len -
1124                         (IEEE80211_FCS_LEN + sizeof(struct rx_status)));
1125
1126         update_qual_rssi(mac, skb->data, skb->len, stats.signal,
1127                          status->signal_strength);
1128
1129         r = filter_rx(ieee, skb->data, skb->len, &stats);
1130         if (r <= 0) {
1131                 if (r < 0) {
1132                         ieee->stats.rx_errors++;
1133                         dev_dbg_f(zd_mac_dev(mac), "Error in packet.\n");
1134                 }
1135                 goto free_skb;
1136         }
1137
1138         if (ieee->iw_mode == IW_MODE_MONITOR)
1139                 fill_rt_header(skb_push(skb, sizeof(struct zd_rt_hdr)), mac,
1140                                &stats, status);
1141
1142         r = ieee80211_rx(ieee, skb, &stats);
1143         if (r)
1144                 return;
1145 free_skb:
1146         /* We are always in a soft irq. */
1147         dev_kfree_skb(skb);
1148 }
1149
1150 static void do_rx(unsigned long mac_ptr)
1151 {
1152         struct zd_mac *mac = (struct zd_mac *)mac_ptr;
1153         struct sk_buff *skb;
1154
1155         while ((skb = skb_dequeue(&mac->rx_queue)) != NULL)
1156                 zd_mac_rx(mac, skb);
1157 }
1158
1159 int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length)
1160 {
1161         struct sk_buff *skb;
1162
1163         skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
1164         if (!skb) {
1165                 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1166                 dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n");
1167                 ieee->stats.rx_dropped++;
1168                 return -ENOMEM;
1169         }
1170         skb_reserve(skb, sizeof(struct zd_rt_hdr));
1171         memcpy(__skb_put(skb, length), buffer, length);
1172         skb_queue_tail(&mac->rx_queue, skb);
1173         tasklet_schedule(&mac->rx_tasklet);
1174         return 0;
1175 }
1176
1177 static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
1178                      int pri)
1179 {
1180         return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
1181 }
1182
1183 static void set_security(struct net_device *netdev,
1184                          struct ieee80211_security *sec)
1185 {
1186         struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
1187         struct ieee80211_security *secinfo = &ieee->sec;
1188         int keyidx;
1189
1190         dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
1191
1192         for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
1193                 if (sec->flags & (1<<keyidx)) {
1194                         secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
1195                         secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
1196                         memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
1197                                SCM_KEY_LEN);
1198                 }
1199
1200         if (sec->flags & SEC_ACTIVE_KEY) {
1201                 secinfo->active_key = sec->active_key;
1202                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1203                         "   .active_key = %d\n", sec->active_key);
1204         }
1205         if (sec->flags & SEC_UNICAST_GROUP) {
1206                 secinfo->unicast_uses_group = sec->unicast_uses_group;
1207                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1208                         "   .unicast_uses_group = %d\n",
1209                         sec->unicast_uses_group);
1210         }
1211         if (sec->flags & SEC_LEVEL) {
1212                 secinfo->level = sec->level;
1213                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1214                         "   .level = %d\n", sec->level);
1215         }
1216         if (sec->flags & SEC_ENABLED) {
1217                 secinfo->enabled = sec->enabled;
1218                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1219                         "   .enabled = %d\n", sec->enabled);
1220         }
1221         if (sec->flags & SEC_ENCRYPT) {
1222                 secinfo->encrypt = sec->encrypt;
1223                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1224                         "   .encrypt = %d\n", sec->encrypt);
1225         }
1226         if (sec->flags & SEC_AUTH_MODE) {
1227                 secinfo->auth_mode = sec->auth_mode;
1228                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1229                         "   .auth_mode = %d\n", sec->auth_mode);
1230         }
1231 }
1232
1233 static void ieee_init(struct ieee80211_device *ieee)
1234 {
1235         ieee->mode = IEEE_B | IEEE_G;
1236         ieee->freq_band = IEEE80211_24GHZ_BAND;
1237         ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
1238         ieee->tx_headroom = sizeof(struct zd_ctrlset);
1239         ieee->set_security = set_security;
1240         ieee->hard_start_xmit = netdev_tx;
1241
1242         /* Software encryption/decryption for now */
1243         ieee->host_build_iv = 0;
1244         ieee->host_encrypt = 1;
1245         ieee->host_decrypt = 1;
1246
1247         /* FIXME: default to managed mode, until ieee80211 and zd1211rw can
1248          * correctly support AUTO */
1249         ieee->iw_mode = IW_MODE_INFRA;
1250 }
1251
1252 static void softmac_init(struct ieee80211softmac_device *sm)
1253 {
1254         sm->set_channel = set_channel;
1255         sm->bssinfo_change = bssinfo_change;
1256 }
1257
1258 struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
1259 {
1260         struct zd_mac *mac = zd_netdev_mac(ndev);
1261         struct iw_statistics *iw_stats = &mac->iw_stats;
1262         unsigned int i, count, qual_total, rssi_total;
1263
1264         memset(iw_stats, 0, sizeof(struct iw_statistics));
1265         /* We are not setting the status, because ieee->state is not updated
1266          * at all and this driver doesn't track authentication state.
1267          */
1268         spin_lock_irq(&mac->lock);
1269         count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ?
1270                 mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE;
1271         qual_total = rssi_total = 0;
1272         for (i = 0; i < count; i++) {
1273                 qual_total += mac->qual_buffer[i];
1274                 rssi_total += mac->rssi_buffer[i];
1275         }
1276         spin_unlock_irq(&mac->lock);
1277         iw_stats->qual.updated = IW_QUAL_NOISE_INVALID;
1278         if (count > 0) {
1279                 iw_stats->qual.qual = qual_total / count;
1280                 iw_stats->qual.level = rssi_total / count;
1281                 iw_stats->qual.updated |=
1282                         IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED;
1283         } else {
1284                 iw_stats->qual.updated |=
1285                         IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID;
1286         }
1287         /* TODO: update counter */
1288         return iw_stats;
1289 }
1290
1291 #define LINK_LED_WORK_DELAY HZ
1292
1293 static void link_led_handler(struct work_struct *work)
1294 {
1295         struct zd_mac *mac =
1296                 container_of(work, struct zd_mac, housekeeping.link_led_work.work);
1297         struct zd_chip *chip = &mac->chip;
1298         struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev);
1299         int is_associated;
1300         int r;
1301
1302         spin_lock_irq(&mac->lock);
1303         is_associated = sm->associnfo.associated != 0;
1304         spin_unlock_irq(&mac->lock);
1305
1306         r = zd_chip_control_leds(chip,
1307                                  is_associated ? LED_ASSOCIATED : LED_SCANNING);
1308         if (r)
1309                 dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
1310
1311         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1312                            LINK_LED_WORK_DELAY);
1313 }
1314
1315 static void housekeeping_init(struct zd_mac *mac)
1316 {
1317         INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
1318 }
1319
1320 static void housekeeping_enable(struct zd_mac *mac)
1321 {
1322         dev_dbg_f(zd_mac_dev(mac), "\n");
1323         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1324                            0);
1325 }
1326
1327 static void housekeeping_disable(struct zd_mac *mac)
1328 {
1329         dev_dbg_f(zd_mac_dev(mac), "\n");
1330         cancel_rearming_delayed_workqueue(zd_workqueue,
1331                 &mac->housekeeping.link_led_work);
1332         zd_chip_control_leds(&mac->chip, LED_OFF);
1333 }