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