git.oblomov.eu Git - 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_init_hw(struct zd_mac *mac, u8 device_type)
  90 {
  91         int r;
  92         struct zd_chip *chip = &mac->chip;
  93         u8 addr[ETH_ALEN];
  94         u8 default_regdomain;
  95
  96         r = zd_chip_enable_int(chip);
  97         if (r)
  98                 goto out;
  99         r = zd_chip_init_hw(chip, device_type);
 100         if (r)
 101                 goto disable_int;
 102
 103         zd_get_e2p_mac_addr(chip, addr);
 104         r = zd_write_mac_addr(chip, addr);
 105         if (r)
 106                 goto disable_int;
 107         ZD_ASSERT(!irqs_disabled());
 108         spin_lock_irq(&mac->lock);
 109         memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
 110         spin_unlock_irq(&mac->lock);
 111
 112         r = zd_read_regdomain(chip, &default_regdomain);
 113         if (r)
 114                 goto disable_int;
 115         if (!zd_regdomain_supported(default_regdomain)) {
 116                 dev_dbg_f(zd_mac_dev(mac),
 117                           "Regulatory Domain %#04x is not supported.\n",
 118                           default_regdomain);
 119                 r = -EINVAL;
 120                 goto disable_int;
 121         }
 122         spin_lock_irq(&mac->lock);
 123         mac->regdomain = mac->default_regdomain = default_regdomain;
 124         spin_unlock_irq(&mac->lock);
 125         r = reset_channel(mac);
 126         if (r)
 127                 goto disable_int;
 128
 129         /* We must inform the device that we are doing encryption/decryption in
 130          * software at the moment. */
 131         r = zd_set_encryption_type(chip, ENC_SNIFFER);
 132         if (r)
 133                 goto disable_int;
 134
 135         r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
 136         if (r)
 137                 goto disable_int;
 138
 139         r = 0;
 140 disable_int:
 141         zd_chip_disable_int(chip);
 142 out:
 143         return r;
 144 }
 145
 146 void zd_mac_clear(struct zd_mac *mac)
 147 {
 148         flush_workqueue(zd_workqueue);
 149         skb_queue_purge(&mac->rx_queue);
 150         tasklet_kill(&mac->rx_tasklet);
 151         zd_chip_clear(&mac->chip);
 152         ZD_ASSERT(!spin_is_locked(&mac->lock));
 153         ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
 154 }
 155
 156 static int reset_mode(struct zd_mac *mac)
 157 {
 158         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 159         struct zd_ioreq32 ioreqs[] = {
 160                 { CR_RX_FILTER, STA_RX_FILTER },
 161                 { CR_SNIFFER_ON, 0U },
 162         };
 163
 164         if (ieee->iw_mode == IW_MODE_MONITOR) {
 165                 ioreqs[0].value = 0xffffffff;
 166                 ioreqs[1].value = 0x1;
 167         }
 168
 169         return zd_iowrite32a(&mac->chip, ioreqs, ARRAY_SIZE(ioreqs));
 170 }
 171
 172 int zd_mac_open(struct net_device *netdev)
 173 {
 174         struct zd_mac *mac = zd_netdev_mac(netdev);
 175         struct zd_chip *chip = &mac->chip;
 176         int r;
 177
 178         tasklet_enable(&mac->rx_tasklet);
 179
 180         r = zd_chip_enable_int(chip);
 181         if (r < 0)
 182                 goto out;
 183
 184         r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
 185         if (r < 0)
 186                 goto disable_int;
 187         r = reset_mode(mac);
 188         if (r)
 189                 goto disable_int;
 190         r = zd_chip_switch_radio_on(chip);
 191         if (r < 0)
 192                 goto disable_int;
 193         r = zd_chip_set_channel(chip, mac->requested_channel);
 194         if (r < 0)
 195                 goto disable_radio;
 196         r = zd_chip_enable_rx(chip);
 197         if (r < 0)
 198                 goto disable_radio;
 199         r = zd_chip_enable_hwint(chip);
 200         if (r < 0)
 201                 goto disable_rx;
 202
 203         housekeeping_enable(mac);
 204         ieee80211softmac_start(netdev);
 205         return 0;
 206 disable_rx:
 207         zd_chip_disable_rx(chip);
 208 disable_radio:
 209         zd_chip_switch_radio_off(chip);
 210 disable_int:
 211         zd_chip_disable_int(chip);
 212 out:
 213         return r;
 214 }
 215
 216 int zd_mac_stop(struct net_device *netdev)
 217 {
 218         struct zd_mac *mac = zd_netdev_mac(netdev);
 219         struct zd_chip *chip = &mac->chip;
 220
 221         netif_stop_queue(netdev);
 222
 223         /*
 224          * The order here deliberately is a little different from the open()
 225          * method, since we need to make sure there is no opportunity for RX
 226          * frames to be processed by softmac after we have stopped it.
 227          */
 228
 229         zd_chip_disable_rx(chip);
 230         skb_queue_purge(&mac->rx_queue);
 231         tasklet_disable(&mac->rx_tasklet);
 232         housekeeping_disable(mac);
 233         ieee80211softmac_stop(netdev);
 234
 235         /* Ensure no work items are running or queued from this point */
 236         cancel_delayed_work(&mac->set_rts_cts_work);
 237         cancel_delayed_work(&mac->set_basic_rates_work);
 238         flush_workqueue(zd_workqueue);
 239         mac->updating_rts_rate = 0;
 240         mac->updating_basic_rates = 0;
 241
 242         zd_chip_disable_hwint(chip);
 243         zd_chip_switch_radio_off(chip);
 244         zd_chip_disable_int(chip);
 245
 246         return 0;
 247 }
 248
 249 int zd_mac_set_mac_address(struct net_device *netdev, void *p)
 250 {
 251         int r;
 252         unsigned long flags;
 253         struct sockaddr *addr = p;
 254         struct zd_mac *mac = zd_netdev_mac(netdev);
 255         struct zd_chip *chip = &mac->chip;
 256
 257         if (!is_valid_ether_addr(addr->sa_data))
 258                 return -EADDRNOTAVAIL;
 259
 260         dev_dbg_f(zd_mac_dev(mac),
 261                   "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data));
 262
 263         r = zd_write_mac_addr(chip, addr->sa_data);
 264         if (r)
 265                 return r;
 266
 267         spin_lock_irqsave(&mac->lock, flags);
 268         memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
 269         spin_unlock_irqrestore(&mac->lock, flags);
 270
 271         return 0;
 272 }
 273
 274 static void set_multicast_hash_handler(struct work_struct *work)
 275 {
 276         struct zd_mac *mac = container_of(work, struct zd_mac,
 277                                           set_multicast_hash_work);
 278         struct zd_mc_hash hash;
 279
 280         spin_lock_irq(&mac->lock);
 281         hash = mac->multicast_hash;
 282         spin_unlock_irq(&mac->lock);
 283
 284         zd_chip_set_multicast_hash(&mac->chip, &hash);
 285 }
 286
 287 void zd_mac_set_multicast_list(struct net_device *dev)
 288 {
 289         struct zd_mc_hash hash;
 290         struct zd_mac *mac = zd_netdev_mac(dev);
 291         struct dev_mc_list *mc;
 292         unsigned long flags;
 293
 294         if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
 295                 zd_mc_add_all(&hash);
 296         } else {
 297                 zd_mc_clear(&hash);
 298                 for (mc = dev->mc_list; mc; mc = mc->next) {
 299                         dev_dbg_f(zd_mac_dev(mac), "mc addr " MAC_FMT "\n",
 300                                   MAC_ARG(mc->dmi_addr));
 301                         zd_mc_add_addr(&hash, mc->dmi_addr);
 302                 }
 303         }
 304
 305         spin_lock_irqsave(&mac->lock, flags);
 306         mac->multicast_hash = hash;
 307         spin_unlock_irqrestore(&mac->lock, flags);
 308         queue_work(zd_workqueue, &mac->set_multicast_hash_work);
 309 }
 310
 311 int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
 312 {
 313         int r;
 314         u8 channel;
 315
 316         ZD_ASSERT(!irqs_disabled());
 317         spin_lock_irq(&mac->lock);
 318         if (regdomain == 0) {
 319                 regdomain = mac->default_regdomain;
 320         }
 321         if (!zd_regdomain_supported(regdomain)) {
 322                 spin_unlock_irq(&mac->lock);
 323                 return -EINVAL;
 324         }
 325         mac->regdomain = regdomain;
 326         channel = mac->requested_channel;
 327         spin_unlock_irq(&mac->lock);
 328
 329         r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
 330         if (r)
 331                 return r;
 332         if (!zd_regdomain_supports_channel(regdomain, channel)) {
 333                 r = reset_channel(mac);
 334                 if (r)
 335                         return r;
 336         }
 337
 338         return 0;
 339 }
 340
 341 u8 zd_mac_get_regdomain(struct zd_mac *mac)
 342 {
 343         unsigned long flags;
 344         u8 regdomain;
 345
 346         spin_lock_irqsave(&mac->lock, flags);
 347         regdomain = mac->regdomain;
 348         spin_unlock_irqrestore(&mac->lock, flags);
 349         return regdomain;
 350 }
 351
 352 /* Fallback to lowest rate, if rate is unknown. */
 353 static u8 rate_to_zd_rate(u8 rate)
 354 {
 355         switch (rate) {
 356         case IEEE80211_CCK_RATE_2MB:
 357                 return ZD_CCK_RATE_2M;
 358         case IEEE80211_CCK_RATE_5MB:
 359                 return ZD_CCK_RATE_5_5M;
 360         case IEEE80211_CCK_RATE_11MB:
 361                 return ZD_CCK_RATE_11M;
 362         case IEEE80211_OFDM_RATE_6MB:
 363                 return ZD_OFDM_RATE_6M;
 364         case IEEE80211_OFDM_RATE_9MB:
 365                 return ZD_OFDM_RATE_9M;
 366         case IEEE80211_OFDM_RATE_12MB:
 367                 return ZD_OFDM_RATE_12M;
 368         case IEEE80211_OFDM_RATE_18MB:
 369                 return ZD_OFDM_RATE_18M;
 370         case IEEE80211_OFDM_RATE_24MB:
 371                 return ZD_OFDM_RATE_24M;
 372         case IEEE80211_OFDM_RATE_36MB:
 373                 return ZD_OFDM_RATE_36M;
 374         case IEEE80211_OFDM_RATE_48MB:
 375                 return ZD_OFDM_RATE_48M;
 376         case IEEE80211_OFDM_RATE_54MB:
 377                 return ZD_OFDM_RATE_54M;
 378         }
 379         return ZD_CCK_RATE_1M;
 380 }
 381
 382 static u16 rate_to_cr_rate(u8 rate)
 383 {
 384         switch (rate) {
 385         case IEEE80211_CCK_RATE_2MB:
 386                 return CR_RATE_1M;
 387         case IEEE80211_CCK_RATE_5MB:
 388                 return CR_RATE_5_5M;
 389         case IEEE80211_CCK_RATE_11MB:
 390                 return CR_RATE_11M;
 391         case IEEE80211_OFDM_RATE_6MB:
 392                 return CR_RATE_6M;
 393         case IEEE80211_OFDM_RATE_9MB:
 394                 return CR_RATE_9M;
 395         case IEEE80211_OFDM_RATE_12MB:
 396                 return CR_RATE_12M;
 397         case IEEE80211_OFDM_RATE_18MB:
 398                 return CR_RATE_18M;
 399         case IEEE80211_OFDM_RATE_24MB:
 400                 return CR_RATE_24M;
 401         case IEEE80211_OFDM_RATE_36MB:
 402                 return CR_RATE_36M;
 403         case IEEE80211_OFDM_RATE_48MB:
 404                 return CR_RATE_48M;
 405         case IEEE80211_OFDM_RATE_54MB:
 406                 return CR_RATE_54M;
 407         }
 408         return CR_RATE_1M;
 409 }
 410
 411 static void try_enable_tx(struct zd_mac *mac)
 412 {
 413         unsigned long flags;
 414
 415         spin_lock_irqsave(&mac->lock, flags);
 416         if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
 417                 netif_wake_queue(mac->netdev);
 418         spin_unlock_irqrestore(&mac->lock, flags);
 419 }
 420
 421 static void set_rts_cts_work(struct work_struct *work)
 422 {
 423         struct zd_mac *mac =
 424                 container_of(work, struct zd_mac, set_rts_cts_work.work);
 425         unsigned long flags;
 426         u8 rts_rate;
 427         unsigned int short_preamble;
 428
 429         mutex_lock(&mac->chip.mutex);
 430
 431         spin_lock_irqsave(&mac->lock, flags);
 432         mac->updating_rts_rate = 0;
 433         rts_rate = mac->rts_rate;
 434         short_preamble = mac->short_preamble;
 435         spin_unlock_irqrestore(&mac->lock, flags);
 436
 437         zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
 438         mutex_unlock(&mac->chip.mutex);
 439
 440         try_enable_tx(mac);
 441 }
 442
 443 static void set_basic_rates_work(struct work_struct *work)
 444 {
 445         struct zd_mac *mac =
 446                 container_of(work, struct zd_mac, set_basic_rates_work.work);
 447         unsigned long flags;
 448         u16 basic_rates;
 449
 450         mutex_lock(&mac->chip.mutex);
 451
 452         spin_lock_irqsave(&mac->lock, flags);
 453         mac->updating_basic_rates = 0;
 454         basic_rates = mac->basic_rates;
 455         spin_unlock_irqrestore(&mac->lock, flags);
 456
 457         zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
 458         mutex_unlock(&mac->chip.mutex);
 459
 460         try_enable_tx(mac);
 461 }
 462
 463 static void bssinfo_change(struct net_device *netdev, u32 changes)
 464 {
 465         struct zd_mac *mac = zd_netdev_mac(netdev);
 466         struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
 467         struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
 468         int need_set_rts_cts = 0;
 469         int need_set_rates = 0;
 470         u16 basic_rates;
 471         unsigned long flags;
 472
 473         dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
 474
 475         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
 476                 spin_lock_irqsave(&mac->lock, flags);
 477                 mac->short_preamble = bssinfo->short_preamble;
 478                 spin_unlock_irqrestore(&mac->lock, flags);
 479                 need_set_rts_cts = 1;
 480         }
 481
 482         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
 483                 /* Set RTS rate to highest available basic rate */
 484                 u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac,
 485                         &bssinfo->supported_rates, 1);
 486                 hi_rate = rate_to_zd_rate(hi_rate);
 487
 488                 spin_lock_irqsave(&mac->lock, flags);
 489                 if (hi_rate != mac->rts_rate) {
 490                         mac->rts_rate = hi_rate;
 491                         need_set_rts_cts = 1;
 492                 }
 493                 spin_unlock_irqrestore(&mac->lock, flags);
 494
 495                 /* Set basic rates */
 496                 need_set_rates = 1;
 497                 if (bssinfo->supported_rates.count == 0) {
 498                         /* Allow the device to be flexible */
 499                         basic_rates = CR_RATES_80211B | CR_RATES_80211G;
 500                 } else {
 501                         int i = 0;
 502                         basic_rates = 0;
 503
 504                         for (i = 0; i < bssinfo->supported_rates.count; i++) {
 505                                 u16 rate = bssinfo->supported_rates.rates[i];
 506                                 if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
 507                                         continue;
 508
 509                                 rate &= ~IEEE80211_BASIC_RATE_MASK;
 510                                 basic_rates |= rate_to_cr_rate(rate);
 511                         }
 512                 }
 513                 spin_lock_irqsave(&mac->lock, flags);
 514                 mac->basic_rates = basic_rates;
 515                 spin_unlock_irqrestore(&mac->lock, flags);
 516         }
 517
 518         /* Schedule any changes we made above */
 519
 520         spin_lock_irqsave(&mac->lock, flags);
 521         if (need_set_rts_cts && !mac->updating_rts_rate) {
 522                 mac->updating_rts_rate = 1;
 523                 netif_stop_queue(mac->netdev);
 524                 queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0);
 525         }
 526         if (need_set_rates && !mac->updating_basic_rates) {
 527                 mac->updating_basic_rates = 1;
 528                 netif_stop_queue(mac->netdev);
 529                 queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work,
 530                                    0);
 531         }
 532         spin_unlock_irqrestore(&mac->lock, flags);
 533 }
 534
 535 static void set_channel(struct net_device *netdev, u8 channel)
 536 {
 537         struct zd_mac *mac = zd_netdev_mac(netdev);
 538
 539         dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
 540
 541         zd_chip_set_channel(&mac->chip, channel);
 542 }
 543
 544 int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
 545 {
 546         unsigned long lock_flags;
 547         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 548
 549         if (ieee->iw_mode == IW_MODE_INFRA)
 550                 return -EPERM;
 551
 552         spin_lock_irqsave(&mac->lock, lock_flags);
 553         if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
 554                 spin_unlock_irqrestore(&mac->lock, lock_flags);
 555                 return -EINVAL;
 556         }
 557         mac->requested_channel = channel;
 558         spin_unlock_irqrestore(&mac->lock, lock_flags);
 559         if (netif_running(mac->netdev))
 560                 return zd_chip_set_channel(&mac->chip, channel);
 561         else
 562                 return 0;
 563 }
 564
 565 u8 zd_mac_get_channel(struct zd_mac *mac)
 566 {
 567         u8 channel = zd_chip_get_channel(&mac->chip);
 568
 569         dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel);
 570         return channel;
 571 }
 572
 573 /* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
 574 static u8 zd_rate_typed(u8 zd_rate)
 575 {
 576         static const u8 typed_rates[16] = {
 577                 [ZD_CCK_RATE_1M]        = ZD_CS_CCK|ZD_CCK_RATE_1M,
 578                 [ZD_CCK_RATE_2M]        = ZD_CS_CCK|ZD_CCK_RATE_2M,
 579                 [ZD_CCK_RATE_5_5M]      = ZD_CS_CCK|ZD_CCK_RATE_5_5M,
 580                 [ZD_CCK_RATE_11M]       = ZD_CS_CCK|ZD_CCK_RATE_11M,
 581                 [ZD_OFDM_RATE_6M]       = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
 582                 [ZD_OFDM_RATE_9M]       = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
 583                 [ZD_OFDM_RATE_12M]      = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
 584                 [ZD_OFDM_RATE_18M]      = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
 585                 [ZD_OFDM_RATE_24M]      = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
 586                 [ZD_OFDM_RATE_36M]      = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
 587                 [ZD_OFDM_RATE_48M]      = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
 588                 [ZD_OFDM_RATE_54M]      = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
 589         };
 590
 591         ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
 592         return typed_rates[zd_rate & ZD_CS_RATE_MASK];
 593 }
 594
 595 int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
 596 {
 597         struct ieee80211_device *ieee;
 598
 599         switch (mode) {
 600         case IW_MODE_AUTO:
 601         case IW_MODE_ADHOC:
 602         case IW_MODE_INFRA:
 603                 mac->netdev->type = ARPHRD_ETHER;
 604                 break;
 605         case IW_MODE_MONITOR:
 606                 mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
 607                 break;
 608         default:
 609                 dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
 610                 return -EINVAL;
 611         }
 612
 613         ieee = zd_mac_to_ieee80211(mac);
 614         ZD_ASSERT(!irqs_disabled());
 615         spin_lock_irq(&ieee->lock);
 616         ieee->iw_mode = mode;
 617         spin_unlock_irq(&ieee->lock);
 618
 619         if (netif_running(mac->netdev))
 620                 return reset_mode(mac);
 621
 622         return 0;
 623 }
 624
 625 int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
 626 {
 627         unsigned long flags;
 628         struct ieee80211_device *ieee;
 629
 630         ieee = zd_mac_to_ieee80211(mac);
 631         spin_lock_irqsave(&ieee->lock, flags);
 632         *mode = ieee->iw_mode;
 633         spin_unlock_irqrestore(&ieee->lock, flags);
 634         return 0;
 635 }
 636
 637 int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
 638 {
 639         int i;
 640         const struct channel_range *channel_range;
 641         u8 regdomain;
 642
 643         memset(range, 0, sizeof(*range));
 644
 645         /* FIXME: Not so important and depends on the mode. For 802.11g
 646          * usually this value is used. It seems to be that Bit/s number is
 647          * given here.
 648          */
 649         range->throughput = 27 * 1000 * 1000;
 650
 651         range->max_qual.qual = 100;
 652         range->max_qual.level = 100;
 653
 654         /* FIXME: Needs still to be tuned. */
 655         range->avg_qual.qual = 71;
 656         range->avg_qual.level = 80;
 657
 658         /* FIXME: depends on standard? */
 659         range->min_rts = 256;
 660         range->max_rts = 2346;
 661
 662         range->min_frag = MIN_FRAG_THRESHOLD;
 663         range->max_frag = MAX_FRAG_THRESHOLD;
 664
 665         range->max_encoding_tokens = WEP_KEYS;
 666         range->num_encoding_sizes = 2;
 667         range->encoding_size[0] = 5;
 668         range->encoding_size[1] = WEP_KEY_LEN;
 669
 670         range->we_version_compiled = WIRELESS_EXT;
 671         range->we_version_source = 20;
 672
 673         range->enc_capa = IW_ENC_CAPA_WPA |  IW_ENC_CAPA_WPA2 |
 674                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
 675
 676         ZD_ASSERT(!irqs_disabled());
 677         spin_lock_irq(&mac->lock);
 678         regdomain = mac->regdomain;
 679         spin_unlock_irq(&mac->lock);
 680         channel_range = zd_channel_range(regdomain);
 681
 682         range->num_channels = channel_range->end - channel_range->start;
 683         range->old_num_channels = range->num_channels;
 684         range->num_frequency = range->num_channels;
 685         range->old_num_frequency = range->num_frequency;
 686
 687         for (i = 0; i < range->num_frequency; i++) {
 688                 struct iw_freq *freq = &range->freq[i];
 689                 freq->i = channel_range->start + i;
 690                 zd_channel_to_freq(freq, freq->i);
 691         }
 692
 693         return 0;
 694 }
 695
 696 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
 697 {
 698         static const u8 rate_divisor[] = {
 699                 [ZD_CCK_RATE_1M]        =  1,
 700                 [ZD_CCK_RATE_2M]        =  2,
 701                 [ZD_CCK_RATE_5_5M]      = 11, /* bits must be doubled */
 702                 [ZD_CCK_RATE_11M]       = 11,
 703                 [ZD_OFDM_RATE_6M]       =  6,
 704                 [ZD_OFDM_RATE_9M]       =  9,
 705                 [ZD_OFDM_RATE_12M]      = 12,
 706                 [ZD_OFDM_RATE_18M]      = 18,
 707                 [ZD_OFDM_RATE_24M]      = 24,
 708                 [ZD_OFDM_RATE_36M]      = 36,
 709                 [ZD_OFDM_RATE_48M]      = 48,
 710                 [ZD_OFDM_RATE_54M]      = 54,
 711         };
 712
 713         u32 bits = (u32)tx_length * 8;
 714         u32 divisor;
 715
 716         divisor = rate_divisor[zd_rate];
 717         if (divisor == 0)
 718                 return -EINVAL;
 719
 720         switch (zd_rate) {
 721         case ZD_CCK_RATE_5_5M:
 722                 bits = (2*bits) + 10; /* round up to the next integer */
 723                 break;
 724         case ZD_CCK_RATE_11M:
 725                 if (service) {
 726                         u32 t = bits % 11;
 727                         *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
 728                         if (0 < t && t <= 3) {
 729                                 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
 730                         }
 731                 }
 732                 bits += 10; /* round up to the next integer */
 733                 break;
 734         }
 735
 736         return bits/divisor;
 737 }
 738
 739 enum {
 740         R2M_SHORT_PREAMBLE = 0x01,
 741         R2M_11A            = 0x02,
 742 };
 743
 744 static u8 zd_rate_to_modulation(u8 zd_rate, int flags)
 745 {
 746         u8 modulation;
 747
 748         modulation = zd_rate_typed(zd_rate);
 749         if (flags & R2M_SHORT_PREAMBLE) {
 750                 switch (ZD_CS_RATE(modulation)) {
 751                 case ZD_CCK_RATE_2M:
 752                 case ZD_CCK_RATE_5_5M:
 753                 case ZD_CCK_RATE_11M:
 754                         modulation |= ZD_CS_CCK_PREA_SHORT;
 755                         return modulation;
 756                 }
 757         }
 758         if (flags & R2M_11A) {
 759                 if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM)
 760                         modulation |= ZD_CS_OFDM_MODE_11A;
 761         }
 762         return modulation;
 763 }
 764
 765 static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
 766                               struct ieee80211_hdr_4addr *hdr)
 767 {
 768         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
 769         u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
 770         u8 rate, zd_rate;
 771         int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
 772         int is_multicast = is_multicast_ether_addr(hdr->addr1);
 773         int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
 774                 is_multicast, is_mgt);
 775         int flags = 0;
 776
 777         /* FIXME: 802.11a? */
 778         rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
 779
 780         if (short_preamble)
 781                 flags |= R2M_SHORT_PREAMBLE;
 782
 783         zd_rate = rate_to_zd_rate(rate);
 784         cs->modulation = zd_rate_to_modulation(zd_rate, flags);
 785 }
 786
 787 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
 788                            struct ieee80211_hdr_4addr *header)
 789 {
 790         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
 791         unsigned int tx_length = le16_to_cpu(cs->tx_length);
 792         u16 fctl = le16_to_cpu(header->frame_ctl);
 793         u16 ftype = WLAN_FC_GET_TYPE(fctl);
 794         u16 stype = WLAN_FC_GET_STYPE(fctl);
 795
 796         /*
 797          * CONTROL TODO:
 798          * - if backoff needed, enable bit 0
 799          * - if burst (backoff not needed) disable bit 0
 800          */
 801
 802         cs->control = 0;
 803
 804         /* First fragment */
 805         if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0)
 806                 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
 807
 808         /* Multicast */
 809         if (is_multicast_ether_addr(header->addr1))
 810                 cs->control |= ZD_CS_MULTICAST;
 811
 812         /* PS-POLL */
 813         if (stype == IEEE80211_STYPE_PSPOLL)
 814                 cs->control |= ZD_CS_PS_POLL_FRAME;
 815
 816         /* Unicast data frames over the threshold should have RTS */
 817         if (!is_multicast_ether_addr(header->addr1) &&
 818                 ftype != IEEE80211_FTYPE_MGMT &&
 819                     tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
 820                 cs->control |= ZD_CS_RTS;
 821
 822         /* Use CTS-to-self protection if required */
 823         if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM &&
 824                         ieee80211softmac_protection_needed(softmac)) {
 825                 /* FIXME: avoid sending RTS *and* self-CTS, is that correct? */
 826                 cs->control &= ~ZD_CS_RTS;
 827                 cs->control |= ZD_CS_SELF_CTS;
 828         }
 829
 830         /* FIXME: Management frame? */
 831 }
 832
 833 static int fill_ctrlset(struct zd_mac *mac,
 834                         struct ieee80211_txb *txb,
 835                         int frag_num)
 836 {
 837         int r;
 838         struct sk_buff *skb = txb->fragments[frag_num];
 839         struct ieee80211_hdr_4addr *hdr =
 840                 (struct ieee80211_hdr_4addr *) skb->data;
 841         unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
 842         unsigned int next_frag_len;
 843         unsigned int packet_length;
 844         struct zd_ctrlset *cs = (struct zd_ctrlset *)
 845                 skb_push(skb, sizeof(struct zd_ctrlset));
 846
 847         if (frag_num+1  < txb->nr_frags) {
 848                 next_frag_len = txb->fragments[frag_num+1]->len +
 849                                 IEEE80211_FCS_LEN;
 850         } else {
 851                 next_frag_len = 0;
 852         }
 853         ZD_ASSERT(frag_len <= 0xffff);
 854         ZD_ASSERT(next_frag_len <= 0xffff);
 855
 856         cs_set_modulation(mac, cs, hdr);
 857
 858         cs->tx_length = cpu_to_le16(frag_len);
 859
 860         cs_set_control(mac, cs, hdr);
 861
 862         packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
 863         ZD_ASSERT(packet_length <= 0xffff);
 864         /* ZD1211B: Computing the length difference this way, gives us
 865          * flexibility to compute the packet length.
 866          */
 867         cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ?
 868                         packet_length - frag_len : packet_length);
 869
 870         /*
 871          * CURRENT LENGTH:
 872          * - transmit frame length in microseconds
 873          * - seems to be derived from frame length
 874          * - see Cal_Us_Service() in zdinlinef.h
 875          * - if macp->bTxBurstEnable is enabled, then multiply by 4
 876          *  - bTxBurstEnable is never set in the vendor driver
 877          *
 878          * SERVICE:
 879          * - "for PLCP configuration"
 880          * - always 0 except in some situations at 802.11b 11M
 881          * - see line 53 of zdinlinef.h
 882          */
 883         cs->service = 0;
 884         r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
 885                                  le16_to_cpu(cs->tx_length));
 886         if (r < 0)
 887                 return r;
 888         cs->current_length = cpu_to_le16(r);
 889
 890         if (next_frag_len == 0) {
 891                 cs->next_frame_length = 0;
 892         } else {
 893                 r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
 894                                          next_frag_len);
 895                 if (r < 0)
 896                         return r;
 897                 cs->next_frame_length = cpu_to_le16(r);
 898         }
 899
 900         return 0;
 901 }
 902
 903 static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
 904 {
 905         int i, r;
 906         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
 907
 908         for (i = 0; i < txb->nr_frags; i++) {
 909                 struct sk_buff *skb = txb->fragments[i];
 910
 911                 r = fill_ctrlset(mac, txb, i);
 912                 if (r) {
 913                         ieee->stats.tx_dropped++;
 914                         return r;
 915                 }
 916                 r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
 917                 if (r) {
 918                         ieee->stats.tx_dropped++;
 919                         return r;
 920                 }
 921         }
 922
 923         /* FIXME: shouldn't this be handled by the upper layers? */
 924         mac->netdev->trans_start = jiffies;
 925
 926         ieee80211_txb_free(txb);
 927         return 0;
 928 }
 929
 930 struct zd_rt_hdr {
 931         struct ieee80211_radiotap_header rt_hdr;
 932         u8  rt_flags;
 933         u8  rt_rate;
 934         u16 rt_channel;
 935         u16 rt_chbitmask;
 936 } __attribute__((packed));
 937
 938 static void fill_rt_header(void *buffer, struct zd_mac *mac,
 939                            const struct ieee80211_rx_stats *stats,
 940                            const struct rx_status *status)
 941 {
 942         struct zd_rt_hdr *hdr = buffer;
 943
 944         hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 945         hdr->rt_hdr.it_pad = 0;
 946         hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
 947         hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 948                                  (1 << IEEE80211_RADIOTAP_CHANNEL) |
 949                                  (1 << IEEE80211_RADIOTAP_RATE));
 950
 951         hdr->rt_flags = 0;
 952         if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
 953                 hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
 954
 955         hdr->rt_rate = stats->rate / 5;
 956
 957         /* FIXME: 802.11a */
 958         hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
 959                                              _zd_chip_get_channel(&mac->chip)));
 960         hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
 961                 ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
 962                 ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
 963 }
 964
 965 /* Returns 1 if the data packet is for us and 0 otherwise. */
 966 static int is_data_packet_for_us(struct ieee80211_device *ieee,
 967                                  struct ieee80211_hdr_4addr *hdr)
 968 {
 969         struct net_device *netdev = ieee->dev;
 970         u16 fc = le16_to_cpu(hdr->frame_ctl);
 971
 972         ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
 973
 974         switch (ieee->iw_mode) {
 975         case IW_MODE_ADHOC:
 976                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
 977                     memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) != 0)
 978                         return 0;
 979                 break;
 980         case IW_MODE_AUTO:
 981         case IW_MODE_INFRA:
 982                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
 983                     IEEE80211_FCTL_FROMDS ||
 984                     memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) != 0)
 985                         return 0;
 986                 break;
 987         default:
 988                 ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
 989                 return 0;
 990         }
 991
 992         return memcmp(hdr->addr1, netdev->dev_addr, ETH_ALEN) == 0 ||
 993                (is_multicast_ether_addr(hdr->addr1) &&
 994                 memcmp(hdr->addr3, netdev->dev_addr, ETH_ALEN) != 0) ||
 995                (netdev->flags & IFF_PROMISC);
 996 }
 997
 998 /* Filters received packets. The function returns 1 if the packet should be
 999  * forwarded to ieee80211_rx(). If the packet should be ignored the function
1000  * returns 0. If an invalid packet is found the function returns -EINVAL.
1001  *
1002  * The function calls ieee80211_rx_mgt() directly.
1003  *
1004  * It has been based on ieee80211_rx_any.
1005  */
1006 static int filter_rx(struct ieee80211_device *ieee,
1007                      const u8 *buffer, unsigned int length,
1008                      struct ieee80211_rx_stats *stats)
1009 {
1010         struct ieee80211_hdr_4addr *hdr;
1011         u16 fc;
1012
1013         if (ieee->iw_mode == IW_MODE_MONITOR)
1014                 return 1;
1015
1016         hdr = (struct ieee80211_hdr_4addr *)buffer;
1017         fc = le16_to_cpu(hdr->frame_ctl);
1018         if ((fc & IEEE80211_FCTL_VERS) != 0)
1019                 return -EINVAL;
1020
1021         switch (WLAN_FC_GET_TYPE(fc)) {
1022         case IEEE80211_FTYPE_MGMT:
1023                 if (length < sizeof(struct ieee80211_hdr_3addr))
1024                         return -EINVAL;
1025                 ieee80211_rx_mgt(ieee, hdr, stats);
1026                 return 0;
1027         case IEEE80211_FTYPE_CTL:
1028                 return 0;
1029         case IEEE80211_FTYPE_DATA:
1030                 /* Ignore invalid short buffers */
1031                 if (length < sizeof(struct ieee80211_hdr_3addr))
1032                         return -EINVAL;
1033                 return is_data_packet_for_us(ieee, hdr);
1034         }
1035
1036         return -EINVAL;
1037 }
1038
1039 static void update_qual_rssi(struct zd_mac *mac,
1040                              const u8 *buffer, unsigned int length,
1041                              u8 qual_percent, u8 rssi_percent)
1042 {
1043         unsigned long flags;
1044         struct ieee80211_hdr_3addr *hdr;
1045         int i;
1046
1047         hdr = (struct ieee80211_hdr_3addr *)buffer;
1048         if (length < offsetof(struct ieee80211_hdr_3addr, addr3))
1049                 return;
1050         if (memcmp(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid, ETH_ALEN) != 0)
1051                 return;
1052
1053         spin_lock_irqsave(&mac->lock, flags);
1054         i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE;
1055         mac->qual_buffer[i] = qual_percent;
1056         mac->rssi_buffer[i] = rssi_percent;
1057         mac->stats_count++;
1058         spin_unlock_irqrestore(&mac->lock, flags);
1059 }
1060
1061 static int fill_rx_stats(struct ieee80211_rx_stats *stats,
1062                          const struct rx_status **pstatus,
1063                          struct zd_mac *mac,
1064                          const u8 *buffer, unsigned int length)
1065 {
1066         const struct rx_status *status;
1067
1068         *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status));
1069         if (status->frame_status & ZD_RX_ERROR) {
1070                 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1071                 ieee->stats.rx_errors++;
1072                 if (status->frame_status & ZD_RX_TIMEOUT_ERROR)
1073                         ieee->stats.rx_missed_errors++;
1074                 else if (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR)
1075                         ieee->stats.rx_fifo_errors++;
1076                 else if (status->frame_status & ZD_RX_DECRYPTION_ERROR)
1077                         ieee->ieee_stats.rx_discards_undecryptable++;
1078                 else if (status->frame_status & ZD_RX_CRC32_ERROR) {
1079                         ieee->stats.rx_crc_errors++;
1080                         ieee->ieee_stats.rx_fcs_errors++;
1081                 }
1082                 else if (status->frame_status & ZD_RX_CRC16_ERROR)
1083                         ieee->stats.rx_crc_errors++;
1084                 return -EINVAL;
1085         }
1086
1087         memset(stats, 0, sizeof(struct ieee80211_rx_stats));
1088         stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
1089                                + sizeof(struct rx_status));
1090         /* FIXME: 802.11a */
1091         stats->freq = IEEE80211_24GHZ_BAND;
1092         stats->received_channel = _zd_chip_get_channel(&mac->chip);
1093         stats->rssi = zd_rx_strength_percent(status->signal_strength);
1094         stats->signal = zd_rx_qual_percent(buffer,
1095                                           length - sizeof(struct rx_status),
1096                                           status);
1097         stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
1098         stats->rate = zd_rx_rate(buffer, status);
1099         if (stats->rate)
1100                 stats->mask |= IEEE80211_STATMASK_RATE;
1101
1102         return 0;
1103 }
1104
1105 static void zd_mac_rx(struct zd_mac *mac, struct sk_buff *skb)
1106 {
1107         int r;
1108         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1109         struct ieee80211_rx_stats stats;
1110         const struct rx_status *status;
1111
1112         if (skb->len < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
1113                        IEEE80211_FCS_LEN + sizeof(struct rx_status))
1114         {
1115                 ieee->stats.rx_errors++;
1116                 ieee->stats.rx_length_errors++;
1117                 goto free_skb;
1118         }
1119
1120         r = fill_rx_stats(&stats, &status, mac, skb->data, skb->len);
1121         if (r) {
1122                 /* Only packets with rx errors are included here.
1123                  * The error stats have already been set in fill_rx_stats.
1124                  */
1125                 goto free_skb;
1126         }
1127
1128         __skb_pull(skb, ZD_PLCP_HEADER_SIZE);
1129         __skb_trim(skb, skb->len -
1130                         (IEEE80211_FCS_LEN + sizeof(struct rx_status)));
1131
1132         update_qual_rssi(mac, skb->data, skb->len, stats.signal,
1133                          status->signal_strength);
1134
1135         r = filter_rx(ieee, skb->data, skb->len, &stats);
1136         if (r <= 0) {
1137                 if (r < 0) {
1138                         ieee->stats.rx_errors++;
1139                         dev_dbg_f(zd_mac_dev(mac), "Error in packet.\n");
1140                 }
1141                 goto free_skb;
1142         }
1143
1144         if (ieee->iw_mode == IW_MODE_MONITOR)
1145                 fill_rt_header(skb_push(skb, sizeof(struct zd_rt_hdr)), mac,
1146                                &stats, status);
1147
1148         r = ieee80211_rx(ieee, skb, &stats);
1149         if (r)
1150                 return;
1151 free_skb:
1152         /* We are always in a soft irq. */
1153         dev_kfree_skb(skb);
1154 }
1155
1156 static void do_rx(unsigned long mac_ptr)
1157 {
1158         struct zd_mac *mac = (struct zd_mac *)mac_ptr;
1159         struct sk_buff *skb;
1160
1161         while ((skb = skb_dequeue(&mac->rx_queue)) != NULL)
1162                 zd_mac_rx(mac, skb);
1163 }
1164
1165 int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length)
1166 {
1167         struct sk_buff *skb;
1168
1169         skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
1170         if (!skb) {
1171                 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1172                 dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n");
1173                 ieee->stats.rx_dropped++;
1174                 return -ENOMEM;
1175         }
1176         skb_reserve(skb, sizeof(struct zd_rt_hdr));
1177         memcpy(__skb_put(skb, length), buffer, length);
1178         skb_queue_tail(&mac->rx_queue, skb);
1179         tasklet_schedule(&mac->rx_tasklet);
1180         return 0;
1181 }
1182
1183 static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
1184                      int pri)
1185 {
1186         return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
1187 }
1188
1189 static void set_security(struct net_device *netdev,
1190                          struct ieee80211_security *sec)
1191 {
1192         struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
1193         struct ieee80211_security *secinfo = &ieee->sec;
1194         int keyidx;
1195
1196         dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
1197
1198         for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
1199                 if (sec->flags & (1<<keyidx)) {
1200                         secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
1201                         secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
1202                         memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
1203                                SCM_KEY_LEN);
1204                 }
1205
1206         if (sec->flags & SEC_ACTIVE_KEY) {
1207                 secinfo->active_key = sec->active_key;
1208                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1209                         "   .active_key = %d\n", sec->active_key);
1210         }
1211         if (sec->flags & SEC_UNICAST_GROUP) {
1212                 secinfo->unicast_uses_group = sec->unicast_uses_group;
1213                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1214                         "   .unicast_uses_group = %d\n",
1215                         sec->unicast_uses_group);
1216         }
1217         if (sec->flags & SEC_LEVEL) {
1218                 secinfo->level = sec->level;
1219                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1220                         "   .level = %d\n", sec->level);
1221         }
1222         if (sec->flags & SEC_ENABLED) {
1223                 secinfo->enabled = sec->enabled;
1224                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1225                         "   .enabled = %d\n", sec->enabled);
1226         }
1227         if (sec->flags & SEC_ENCRYPT) {
1228                 secinfo->encrypt = sec->encrypt;
1229                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1230                         "   .encrypt = %d\n", sec->encrypt);
1231         }
1232         if (sec->flags & SEC_AUTH_MODE) {
1233                 secinfo->auth_mode = sec->auth_mode;
1234                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1235                         "   .auth_mode = %d\n", sec->auth_mode);
1236         }
1237 }
1238
1239 static void ieee_init(struct ieee80211_device *ieee)
1240 {
1241         ieee->mode = IEEE_B | IEEE_G;
1242         ieee->freq_band = IEEE80211_24GHZ_BAND;
1243         ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
1244         ieee->tx_headroom = sizeof(struct zd_ctrlset);
1245         ieee->set_security = set_security;
1246         ieee->hard_start_xmit = netdev_tx;
1247
1248         /* Software encryption/decryption for now */
1249         ieee->host_build_iv = 0;
1250         ieee->host_encrypt = 1;
1251         ieee->host_decrypt = 1;
1252
1253         /* FIXME: default to managed mode, until ieee80211 and zd1211rw can
1254          * correctly support AUTO */
1255         ieee->iw_mode = IW_MODE_INFRA;
1256 }
1257
1258 static void softmac_init(struct ieee80211softmac_device *sm)
1259 {
1260         sm->set_channel = set_channel;
1261         sm->bssinfo_change = bssinfo_change;
1262 }
1263
1264 struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
1265 {
1266         struct zd_mac *mac = zd_netdev_mac(ndev);
1267         struct iw_statistics *iw_stats = &mac->iw_stats;
1268         unsigned int i, count, qual_total, rssi_total;
1269
1270         memset(iw_stats, 0, sizeof(struct iw_statistics));
1271         /* We are not setting the status, because ieee->state is not updated
1272          * at all and this driver doesn't track authentication state.
1273          */
1274         spin_lock_irq(&mac->lock);
1275         count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ?
1276                 mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE;
1277         qual_total = rssi_total = 0;
1278         for (i = 0; i < count; i++) {
1279                 qual_total += mac->qual_buffer[i];
1280                 rssi_total += mac->rssi_buffer[i];
1281         }
1282         spin_unlock_irq(&mac->lock);
1283         iw_stats->qual.updated = IW_QUAL_NOISE_INVALID;
1284         if (count > 0) {
1285                 iw_stats->qual.qual = qual_total / count;
1286                 iw_stats->qual.level = rssi_total / count;
1287                 iw_stats->qual.updated |=
1288                         IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED;
1289         } else {
1290                 iw_stats->qual.updated |=
1291                         IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID;
1292         }
1293         /* TODO: update counter */
1294         return iw_stats;
1295 }
1296
1297 #define LINK_LED_WORK_DELAY HZ
1298
1299 static void link_led_handler(struct work_struct *work)
1300 {
1301         struct zd_mac *mac =
1302                 container_of(work, struct zd_mac, housekeeping.link_led_work.work);
1303         struct zd_chip *chip = &mac->chip;
1304         struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev);
1305         int is_associated;
1306         int r;
1307
1308         spin_lock_irq(&mac->lock);
1309         is_associated = sm->associnfo.associated != 0;
1310         spin_unlock_irq(&mac->lock);
1311
1312         r = zd_chip_control_leds(chip,
1313                                  is_associated ? LED_ASSOCIATED : LED_SCANNING);
1314         if (r)
1315                 dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
1316
1317         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1318                            LINK_LED_WORK_DELAY);
1319 }
1320
1321 static void housekeeping_init(struct zd_mac *mac)
1322 {
1323         INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
1324 }
1325
1326 static void housekeeping_enable(struct zd_mac *mac)
1327 {
1328         dev_dbg_f(zd_mac_dev(mac), "\n");
1329         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1330                            0);
1331 }
1332
1333 static void housekeeping_disable(struct zd_mac *mac)
1334 {
1335         dev_dbg_f(zd_mac_dev(mac), "\n");
1336         cancel_rearming_delayed_workqueue(zd_workqueue,
1337                 &mac->housekeeping.link_led_work);
1338         zd_chip_control_leds(&mac->chip, LED_OFF);
1339 }