Merge branch 'release' of master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6
[linux-2.6] / 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 int zd_mac_init(struct zd_mac *mac,
45                 struct net_device *netdev,
46                 struct usb_interface *intf)
47 {
48         struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
49
50         memset(mac, 0, sizeof(*mac));
51         spin_lock_init(&mac->lock);
52         mac->netdev = netdev;
53         INIT_DELAYED_WORK(&mac->set_rts_cts_work, set_rts_cts_work);
54         INIT_DELAYED_WORK(&mac->set_basic_rates_work, set_basic_rates_work);
55
56         ieee_init(ieee);
57         softmac_init(ieee80211_priv(netdev));
58         zd_chip_init(&mac->chip, netdev, intf);
59         housekeeping_init(mac);
60         INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler);
61         return 0;
62 }
63
64 static int reset_channel(struct zd_mac *mac)
65 {
66         int r;
67         unsigned long flags;
68         const struct channel_range *range;
69
70         spin_lock_irqsave(&mac->lock, flags);
71         range = zd_channel_range(mac->regdomain);
72         if (!range->start) {
73                 r = -EINVAL;
74                 goto out;
75         }
76         mac->requested_channel = range->start;
77         r = 0;
78 out:
79         spin_unlock_irqrestore(&mac->lock, flags);
80         return r;
81 }
82
83 int zd_mac_init_hw(struct zd_mac *mac, u8 device_type)
84 {
85         int r;
86         struct zd_chip *chip = &mac->chip;
87         u8 addr[ETH_ALEN];
88         u8 default_regdomain;
89
90         r = zd_chip_enable_int(chip);
91         if (r)
92                 goto out;
93         r = zd_chip_init_hw(chip, device_type);
94         if (r)
95                 goto disable_int;
96
97         zd_get_e2p_mac_addr(chip, addr);
98         r = zd_write_mac_addr(chip, addr);
99         if (r)
100                 goto disable_int;
101         ZD_ASSERT(!irqs_disabled());
102         spin_lock_irq(&mac->lock);
103         memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
104         spin_unlock_irq(&mac->lock);
105
106         r = zd_read_regdomain(chip, &default_regdomain);
107         if (r)
108                 goto disable_int;
109         if (!zd_regdomain_supported(default_regdomain)) {
110                 dev_dbg_f(zd_mac_dev(mac),
111                           "Regulatory Domain %#04x is not supported.\n",
112                           default_regdomain);
113                 r = -EINVAL;
114                 goto disable_int;
115         }
116         spin_lock_irq(&mac->lock);
117         mac->regdomain = mac->default_regdomain = default_regdomain;
118         spin_unlock_irq(&mac->lock);
119         r = reset_channel(mac);
120         if (r)
121                 goto disable_int;
122
123         /* We must inform the device that we are doing encryption/decryption in
124          * software at the moment. */
125         r = zd_set_encryption_type(chip, ENC_SNIFFER);
126         if (r)
127                 goto disable_int;
128
129         r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
130         if (r)
131                 goto disable_int;
132
133         r = 0;
134 disable_int:
135         zd_chip_disable_int(chip);
136 out:
137         return r;
138 }
139
140 void zd_mac_clear(struct zd_mac *mac)
141 {
142         flush_workqueue(zd_workqueue);
143         zd_chip_clear(&mac->chip);
144         ZD_ASSERT(!spin_is_locked(&mac->lock));
145         ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
146 }
147
148 static int reset_mode(struct zd_mac *mac)
149 {
150         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
151         struct zd_ioreq32 ioreqs[3] = {
152                 { CR_RX_FILTER, STA_RX_FILTER },
153                 { CR_SNIFFER_ON, 0U },
154         };
155
156         if (ieee->iw_mode == IW_MODE_MONITOR) {
157                 ioreqs[0].value = 0xffffffff;
158                 ioreqs[1].value = 0x1;
159                 ioreqs[2].value = ENC_SNIFFER;
160         }
161
162         return zd_iowrite32a(&mac->chip, ioreqs, 3);
163 }
164
165 int zd_mac_open(struct net_device *netdev)
166 {
167         struct zd_mac *mac = zd_netdev_mac(netdev);
168         struct zd_chip *chip = &mac->chip;
169         int r;
170
171         r = zd_chip_enable_int(chip);
172         if (r < 0)
173                 goto out;
174
175         r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
176         if (r < 0)
177                 goto disable_int;
178         r = reset_mode(mac);
179         if (r)
180                 goto disable_int;
181         r = zd_chip_switch_radio_on(chip);
182         if (r < 0)
183                 goto disable_int;
184         r = zd_chip_set_channel(chip, mac->requested_channel);
185         if (r < 0)
186                 goto disable_radio;
187         r = zd_chip_enable_rx(chip);
188         if (r < 0)
189                 goto disable_radio;
190         r = zd_chip_enable_hwint(chip);
191         if (r < 0)
192                 goto disable_rx;
193
194         housekeeping_enable(mac);
195         ieee80211softmac_start(netdev);
196         return 0;
197 disable_rx:
198         zd_chip_disable_rx(chip);
199 disable_radio:
200         zd_chip_switch_radio_off(chip);
201 disable_int:
202         zd_chip_disable_int(chip);
203 out:
204         return r;
205 }
206
207 int zd_mac_stop(struct net_device *netdev)
208 {
209         struct zd_mac *mac = zd_netdev_mac(netdev);
210         struct zd_chip *chip = &mac->chip;
211
212         netif_stop_queue(netdev);
213
214         /*
215          * The order here deliberately is a little different from the open()
216          * method, since we need to make sure there is no opportunity for RX
217          * frames to be processed by softmac after we have stopped it.
218          */
219
220         zd_chip_disable_rx(chip);
221         housekeeping_disable(mac);
222         ieee80211softmac_stop(netdev);
223
224         /* Ensure no work items are running or queued from this point */
225         cancel_delayed_work(&mac->set_rts_cts_work);
226         cancel_delayed_work(&mac->set_basic_rates_work);
227         flush_workqueue(zd_workqueue);
228         mac->updating_rts_rate = 0;
229         mac->updating_basic_rates = 0;
230
231         zd_chip_disable_hwint(chip);
232         zd_chip_switch_radio_off(chip);
233         zd_chip_disable_int(chip);
234
235         return 0;
236 }
237
238 int zd_mac_set_mac_address(struct net_device *netdev, void *p)
239 {
240         int r;
241         unsigned long flags;
242         struct sockaddr *addr = p;
243         struct zd_mac *mac = zd_netdev_mac(netdev);
244         struct zd_chip *chip = &mac->chip;
245
246         if (!is_valid_ether_addr(addr->sa_data))
247                 return -EADDRNOTAVAIL;
248
249         dev_dbg_f(zd_mac_dev(mac),
250                   "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data));
251
252         r = zd_write_mac_addr(chip, addr->sa_data);
253         if (r)
254                 return r;
255
256         spin_lock_irqsave(&mac->lock, flags);
257         memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
258         spin_unlock_irqrestore(&mac->lock, flags);
259
260         return 0;
261 }
262
263 static void set_multicast_hash_handler(struct work_struct *work)
264 {
265         struct zd_mac *mac = container_of(work, struct zd_mac,
266                                           set_multicast_hash_work);
267         struct zd_mc_hash hash;
268
269         spin_lock_irq(&mac->lock);
270         hash = mac->multicast_hash;
271         spin_unlock_irq(&mac->lock);
272
273         zd_chip_set_multicast_hash(&mac->chip, &hash);
274 }
275
276 void zd_mac_set_multicast_list(struct net_device *dev)
277 {
278         struct zd_mc_hash hash;
279         struct zd_mac *mac = zd_netdev_mac(dev);
280         struct dev_mc_list *mc;
281         unsigned long flags;
282
283         if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
284                 zd_mc_add_all(&hash);
285         } else {
286                 zd_mc_clear(&hash);
287                 for (mc = dev->mc_list; mc; mc = mc->next) {
288                         dev_dbg_f(zd_mac_dev(mac), "mc addr " MAC_FMT "\n",
289                                   MAC_ARG(mc->dmi_addr));
290                         zd_mc_add_addr(&hash, mc->dmi_addr);
291                 }
292         }
293
294         spin_lock_irqsave(&mac->lock, flags);
295         mac->multicast_hash = hash;
296         spin_unlock_irqrestore(&mac->lock, flags);
297         queue_work(zd_workqueue, &mac->set_multicast_hash_work);
298 }
299
300 int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
301 {
302         int r;
303         u8 channel;
304
305         ZD_ASSERT(!irqs_disabled());
306         spin_lock_irq(&mac->lock);
307         if (regdomain == 0) {
308                 regdomain = mac->default_regdomain;
309         }
310         if (!zd_regdomain_supported(regdomain)) {
311                 spin_unlock_irq(&mac->lock);
312                 return -EINVAL;
313         }
314         mac->regdomain = regdomain;
315         channel = mac->requested_channel;
316         spin_unlock_irq(&mac->lock);
317
318         r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
319         if (r)
320                 return r;
321         if (!zd_regdomain_supports_channel(regdomain, channel)) {
322                 r = reset_channel(mac);
323                 if (r)
324                         return r;
325         }
326
327         return 0;
328 }
329
330 u8 zd_mac_get_regdomain(struct zd_mac *mac)
331 {
332         unsigned long flags;
333         u8 regdomain;
334
335         spin_lock_irqsave(&mac->lock, flags);
336         regdomain = mac->regdomain;
337         spin_unlock_irqrestore(&mac->lock, flags);
338         return regdomain;
339 }
340
341 /* Fallback to lowest rate, if rate is unknown. */
342 static u8 rate_to_zd_rate(u8 rate)
343 {
344         switch (rate) {
345         case IEEE80211_CCK_RATE_2MB:
346                 return ZD_CCK_RATE_2M;
347         case IEEE80211_CCK_RATE_5MB:
348                 return ZD_CCK_RATE_5_5M;
349         case IEEE80211_CCK_RATE_11MB:
350                 return ZD_CCK_RATE_11M;
351         case IEEE80211_OFDM_RATE_6MB:
352                 return ZD_OFDM_RATE_6M;
353         case IEEE80211_OFDM_RATE_9MB:
354                 return ZD_OFDM_RATE_9M;
355         case IEEE80211_OFDM_RATE_12MB:
356                 return ZD_OFDM_RATE_12M;
357         case IEEE80211_OFDM_RATE_18MB:
358                 return ZD_OFDM_RATE_18M;
359         case IEEE80211_OFDM_RATE_24MB:
360                 return ZD_OFDM_RATE_24M;
361         case IEEE80211_OFDM_RATE_36MB:
362                 return ZD_OFDM_RATE_36M;
363         case IEEE80211_OFDM_RATE_48MB:
364                 return ZD_OFDM_RATE_48M;
365         case IEEE80211_OFDM_RATE_54MB:
366                 return ZD_OFDM_RATE_54M;
367         }
368         return ZD_CCK_RATE_1M;
369 }
370
371 static u16 rate_to_cr_rate(u8 rate)
372 {
373         switch (rate) {
374         case IEEE80211_CCK_RATE_2MB:
375                 return CR_RATE_1M;
376         case IEEE80211_CCK_RATE_5MB:
377                 return CR_RATE_5_5M;
378         case IEEE80211_CCK_RATE_11MB:
379                 return CR_RATE_11M;
380         case IEEE80211_OFDM_RATE_6MB:
381                 return CR_RATE_6M;
382         case IEEE80211_OFDM_RATE_9MB:
383                 return CR_RATE_9M;
384         case IEEE80211_OFDM_RATE_12MB:
385                 return CR_RATE_12M;
386         case IEEE80211_OFDM_RATE_18MB:
387                 return CR_RATE_18M;
388         case IEEE80211_OFDM_RATE_24MB:
389                 return CR_RATE_24M;
390         case IEEE80211_OFDM_RATE_36MB:
391                 return CR_RATE_36M;
392         case IEEE80211_OFDM_RATE_48MB:
393                 return CR_RATE_48M;
394         case IEEE80211_OFDM_RATE_54MB:
395                 return CR_RATE_54M;
396         }
397         return CR_RATE_1M;
398 }
399
400 static void try_enable_tx(struct zd_mac *mac)
401 {
402         unsigned long flags;
403
404         spin_lock_irqsave(&mac->lock, flags);
405         if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
406                 netif_wake_queue(mac->netdev);
407         spin_unlock_irqrestore(&mac->lock, flags);
408 }
409
410 static void set_rts_cts_work(struct work_struct *work)
411 {
412         struct zd_mac *mac =
413                 container_of(work, struct zd_mac, set_rts_cts_work.work);
414         unsigned long flags;
415         u8 rts_rate;
416         unsigned int short_preamble;
417
418         mutex_lock(&mac->chip.mutex);
419
420         spin_lock_irqsave(&mac->lock, flags);
421         mac->updating_rts_rate = 0;
422         rts_rate = mac->rts_rate;
423         short_preamble = mac->short_preamble;
424         spin_unlock_irqrestore(&mac->lock, flags);
425
426         zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
427         mutex_unlock(&mac->chip.mutex);
428
429         try_enable_tx(mac);
430 }
431
432 static void set_basic_rates_work(struct work_struct *work)
433 {
434         struct zd_mac *mac =
435                 container_of(work, struct zd_mac, set_basic_rates_work.work);
436         unsigned long flags;
437         u16 basic_rates;
438
439         mutex_lock(&mac->chip.mutex);
440
441         spin_lock_irqsave(&mac->lock, flags);
442         mac->updating_basic_rates = 0;
443         basic_rates = mac->basic_rates;
444         spin_unlock_irqrestore(&mac->lock, flags);
445
446         zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
447         mutex_unlock(&mac->chip.mutex);
448
449         try_enable_tx(mac);
450 }
451
452 static void bssinfo_change(struct net_device *netdev, u32 changes)
453 {
454         struct zd_mac *mac = zd_netdev_mac(netdev);
455         struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
456         struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
457         int need_set_rts_cts = 0;
458         int need_set_rates = 0;
459         u16 basic_rates;
460         unsigned long flags;
461
462         dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
463
464         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
465                 spin_lock_irqsave(&mac->lock, flags);
466                 mac->short_preamble = bssinfo->short_preamble;
467                 spin_unlock_irqrestore(&mac->lock, flags);
468                 need_set_rts_cts = 1;
469         }
470
471         if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
472                 /* Set RTS rate to highest available basic rate */
473                 u8 rate = ieee80211softmac_highest_supported_rate(softmac,
474                         &bssinfo->supported_rates, 1);
475                 rate = rate_to_zd_rate(rate);
476
477                 spin_lock_irqsave(&mac->lock, flags);
478                 if (rate != mac->rts_rate) {
479                         mac->rts_rate = rate;
480                         need_set_rts_cts = 1;
481                 }
482                 spin_unlock_irqrestore(&mac->lock, flags);
483
484                 /* Set basic rates */
485                 need_set_rates = 1;
486                 if (bssinfo->supported_rates.count == 0) {
487                         /* Allow the device to be flexible */
488                         basic_rates = CR_RATES_80211B | CR_RATES_80211G;
489                 } else {
490                         int i = 0;
491                         basic_rates = 0;
492
493                         for (i = 0; i < bssinfo->supported_rates.count; i++) {
494                                 u16 rate = bssinfo->supported_rates.rates[i];
495                                 if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
496                                         continue;
497
498                                 rate &= ~IEEE80211_BASIC_RATE_MASK;
499                                 basic_rates |= rate_to_cr_rate(rate);
500                         }
501                 }
502                 spin_lock_irqsave(&mac->lock, flags);
503                 mac->basic_rates = basic_rates;
504                 spin_unlock_irqrestore(&mac->lock, flags);
505         }
506
507         /* Schedule any changes we made above */
508
509         spin_lock_irqsave(&mac->lock, flags);
510         if (need_set_rts_cts && !mac->updating_rts_rate) {
511                 mac->updating_rts_rate = 1;
512                 netif_stop_queue(mac->netdev);
513                 queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0);
514         }
515         if (need_set_rates && !mac->updating_basic_rates) {
516                 mac->updating_basic_rates = 1;
517                 netif_stop_queue(mac->netdev);
518                 queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work,
519                                    0);
520         }
521         spin_unlock_irqrestore(&mac->lock, flags);
522 }
523
524 static void set_channel(struct net_device *netdev, u8 channel)
525 {
526         struct zd_mac *mac = zd_netdev_mac(netdev);
527
528         dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
529
530         zd_chip_set_channel(&mac->chip, channel);
531 }
532
533 int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
534 {
535         unsigned long lock_flags;
536         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
537
538         if (ieee->iw_mode == IW_MODE_INFRA)
539                 return -EPERM;
540
541         spin_lock_irqsave(&mac->lock, lock_flags);
542         if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
543                 spin_unlock_irqrestore(&mac->lock, lock_flags);
544                 return -EINVAL;
545         }
546         mac->requested_channel = channel;
547         spin_unlock_irqrestore(&mac->lock, lock_flags);
548         if (netif_running(mac->netdev))
549                 return zd_chip_set_channel(&mac->chip, channel);
550         else
551                 return 0;
552 }
553
554 u8 zd_mac_get_channel(struct zd_mac *mac)
555 {
556         u8 channel = zd_chip_get_channel(&mac->chip);
557
558         dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel);
559         return channel;
560 }
561
562 /* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
563 static u8 zd_rate_typed(u8 zd_rate)
564 {
565         static const u8 typed_rates[16] = {
566                 [ZD_CCK_RATE_1M]        = ZD_CS_CCK|ZD_CCK_RATE_1M,
567                 [ZD_CCK_RATE_2M]        = ZD_CS_CCK|ZD_CCK_RATE_2M,
568                 [ZD_CCK_RATE_5_5M]      = ZD_CS_CCK|ZD_CCK_RATE_5_5M,
569                 [ZD_CCK_RATE_11M]       = ZD_CS_CCK|ZD_CCK_RATE_11M,
570                 [ZD_OFDM_RATE_6M]       = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
571                 [ZD_OFDM_RATE_9M]       = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
572                 [ZD_OFDM_RATE_12M]      = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
573                 [ZD_OFDM_RATE_18M]      = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
574                 [ZD_OFDM_RATE_24M]      = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
575                 [ZD_OFDM_RATE_36M]      = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
576                 [ZD_OFDM_RATE_48M]      = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
577                 [ZD_OFDM_RATE_54M]      = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
578         };
579
580         ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
581         return typed_rates[zd_rate & ZD_CS_RATE_MASK];
582 }
583
584 int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
585 {
586         struct ieee80211_device *ieee;
587
588         switch (mode) {
589         case IW_MODE_AUTO:
590         case IW_MODE_ADHOC:
591         case IW_MODE_INFRA:
592                 mac->netdev->type = ARPHRD_ETHER;
593                 break;
594         case IW_MODE_MONITOR:
595                 mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
596                 break;
597         default:
598                 dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
599                 return -EINVAL;
600         }
601
602         ieee = zd_mac_to_ieee80211(mac);
603         ZD_ASSERT(!irqs_disabled());
604         spin_lock_irq(&ieee->lock);
605         ieee->iw_mode = mode;
606         spin_unlock_irq(&ieee->lock);
607
608         if (netif_running(mac->netdev))
609                 return reset_mode(mac);
610
611         return 0;
612 }
613
614 int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
615 {
616         unsigned long flags;
617         struct ieee80211_device *ieee;
618
619         ieee = zd_mac_to_ieee80211(mac);
620         spin_lock_irqsave(&ieee->lock, flags);
621         *mode = ieee->iw_mode;
622         spin_unlock_irqrestore(&ieee->lock, flags);
623         return 0;
624 }
625
626 int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
627 {
628         int i;
629         const struct channel_range *channel_range;
630         u8 regdomain;
631
632         memset(range, 0, sizeof(*range));
633
634         /* FIXME: Not so important and depends on the mode. For 802.11g
635          * usually this value is used. It seems to be that Bit/s number is
636          * given here.
637          */
638         range->throughput = 27 * 1000 * 1000;
639
640         range->max_qual.qual = 100;
641         range->max_qual.level = 100;
642
643         /* FIXME: Needs still to be tuned. */
644         range->avg_qual.qual = 71;
645         range->avg_qual.level = 80;
646
647         /* FIXME: depends on standard? */
648         range->min_rts = 256;
649         range->max_rts = 2346;
650
651         range->min_frag = MIN_FRAG_THRESHOLD;
652         range->max_frag = MAX_FRAG_THRESHOLD;
653
654         range->max_encoding_tokens = WEP_KEYS;
655         range->num_encoding_sizes = 2;
656         range->encoding_size[0] = 5;
657         range->encoding_size[1] = WEP_KEY_LEN;
658
659         range->we_version_compiled = WIRELESS_EXT;
660         range->we_version_source = 20;
661
662         range->enc_capa = IW_ENC_CAPA_WPA |  IW_ENC_CAPA_WPA2 |
663                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
664
665         ZD_ASSERT(!irqs_disabled());
666         spin_lock_irq(&mac->lock);
667         regdomain = mac->regdomain;
668         spin_unlock_irq(&mac->lock);
669         channel_range = zd_channel_range(regdomain);
670
671         range->num_channels = channel_range->end - channel_range->start;
672         range->old_num_channels = range->num_channels;
673         range->num_frequency = range->num_channels;
674         range->old_num_frequency = range->num_frequency;
675
676         for (i = 0; i < range->num_frequency; i++) {
677                 struct iw_freq *freq = &range->freq[i];
678                 freq->i = channel_range->start + i;
679                 zd_channel_to_freq(freq, freq->i);
680         }
681
682         return 0;
683 }
684
685 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
686 {
687         static const u8 rate_divisor[] = {
688                 [ZD_CCK_RATE_1M]        =  1,
689                 [ZD_CCK_RATE_2M]        =  2,
690                 [ZD_CCK_RATE_5_5M]      = 11, /* bits must be doubled */
691                 [ZD_CCK_RATE_11M]       = 11,
692                 [ZD_OFDM_RATE_6M]       =  6,
693                 [ZD_OFDM_RATE_9M]       =  9,
694                 [ZD_OFDM_RATE_12M]      = 12,
695                 [ZD_OFDM_RATE_18M]      = 18,
696                 [ZD_OFDM_RATE_24M]      = 24,
697                 [ZD_OFDM_RATE_36M]      = 36,
698                 [ZD_OFDM_RATE_48M]      = 48,
699                 [ZD_OFDM_RATE_54M]      = 54,
700         };
701
702         u32 bits = (u32)tx_length * 8;
703         u32 divisor;
704
705         divisor = rate_divisor[zd_rate];
706         if (divisor == 0)
707                 return -EINVAL;
708
709         switch (zd_rate) {
710         case ZD_CCK_RATE_5_5M:
711                 bits = (2*bits) + 10; /* round up to the next integer */
712                 break;
713         case ZD_CCK_RATE_11M:
714                 if (service) {
715                         u32 t = bits % 11;
716                         *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
717                         if (0 < t && t <= 3) {
718                                 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
719                         }
720                 }
721                 bits += 10; /* round up to the next integer */
722                 break;
723         }
724
725         return bits/divisor;
726 }
727
728 enum {
729         R2M_SHORT_PREAMBLE = 0x01,
730         R2M_11A            = 0x02,
731 };
732
733 static u8 zd_rate_to_modulation(u8 zd_rate, int flags)
734 {
735         u8 modulation;
736
737         modulation = zd_rate_typed(zd_rate);
738         if (flags & R2M_SHORT_PREAMBLE) {
739                 switch (ZD_CS_RATE(modulation)) {
740                 case ZD_CCK_RATE_2M:
741                 case ZD_CCK_RATE_5_5M:
742                 case ZD_CCK_RATE_11M:
743                         modulation |= ZD_CS_CCK_PREA_SHORT;
744                         return modulation;
745                 }
746         }
747         if (flags & R2M_11A) {
748                 if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM)
749                         modulation |= ZD_CS_OFDM_MODE_11A;
750         }
751         return modulation;
752 }
753
754 static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
755                               struct ieee80211_hdr_4addr *hdr)
756 {
757         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
758         u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
759         u8 rate, zd_rate;
760         int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
761         int is_multicast = is_multicast_ether_addr(hdr->addr1);
762         int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
763                 is_multicast, is_mgt);
764         int flags = 0;
765
766         /* FIXME: 802.11a? */
767         rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
768
769         if (short_preamble)
770                 flags |= R2M_SHORT_PREAMBLE;
771
772         zd_rate = rate_to_zd_rate(rate);
773         cs->modulation = zd_rate_to_modulation(zd_rate, flags);
774 }
775
776 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
777                            struct ieee80211_hdr_4addr *header)
778 {
779         struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
780         unsigned int tx_length = le16_to_cpu(cs->tx_length);
781         u16 fctl = le16_to_cpu(header->frame_ctl);
782         u16 ftype = WLAN_FC_GET_TYPE(fctl);
783         u16 stype = WLAN_FC_GET_STYPE(fctl);
784
785         /*
786          * CONTROL TODO:
787          * - if backoff needed, enable bit 0
788          * - if burst (backoff not needed) disable bit 0
789          */
790
791         cs->control = 0;
792
793         /* First fragment */
794         if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0)
795                 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
796
797         /* Multicast */
798         if (is_multicast_ether_addr(header->addr1))
799                 cs->control |= ZD_CS_MULTICAST;
800
801         /* PS-POLL */
802         if (stype == IEEE80211_STYPE_PSPOLL)
803                 cs->control |= ZD_CS_PS_POLL_FRAME;
804
805         /* Unicast data frames over the threshold should have RTS */
806         if (!is_multicast_ether_addr(header->addr1) &&
807                 ftype != IEEE80211_FTYPE_MGMT &&
808                     tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
809                 cs->control |= ZD_CS_RTS;
810
811         /* Use CTS-to-self protection if required */
812         if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM &&
813                         ieee80211softmac_protection_needed(softmac)) {
814                 /* FIXME: avoid sending RTS *and* self-CTS, is that correct? */
815                 cs->control &= ~ZD_CS_RTS;
816                 cs->control |= ZD_CS_SELF_CTS;
817         }
818
819         /* FIXME: Management frame? */
820 }
821
822 static int fill_ctrlset(struct zd_mac *mac,
823                         struct ieee80211_txb *txb,
824                         int frag_num)
825 {
826         int r;
827         struct sk_buff *skb = txb->fragments[frag_num];
828         struct ieee80211_hdr_4addr *hdr =
829                 (struct ieee80211_hdr_4addr *) skb->data;
830         unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
831         unsigned int next_frag_len;
832         unsigned int packet_length;
833         struct zd_ctrlset *cs = (struct zd_ctrlset *)
834                 skb_push(skb, sizeof(struct zd_ctrlset));
835
836         if (frag_num+1  < txb->nr_frags) {
837                 next_frag_len = txb->fragments[frag_num+1]->len +
838                                 IEEE80211_FCS_LEN;
839         } else {
840                 next_frag_len = 0;
841         }
842         ZD_ASSERT(frag_len <= 0xffff);
843         ZD_ASSERT(next_frag_len <= 0xffff);
844
845         cs_set_modulation(mac, cs, hdr);
846
847         cs->tx_length = cpu_to_le16(frag_len);
848
849         cs_set_control(mac, cs, hdr);
850
851         packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
852         ZD_ASSERT(packet_length <= 0xffff);
853         /* ZD1211B: Computing the length difference this way, gives us
854          * flexibility to compute the packet length.
855          */
856         cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ?
857                         packet_length - frag_len : packet_length);
858
859         /*
860          * CURRENT LENGTH:
861          * - transmit frame length in microseconds
862          * - seems to be derived from frame length
863          * - see Cal_Us_Service() in zdinlinef.h
864          * - if macp->bTxBurstEnable is enabled, then multiply by 4
865          *  - bTxBurstEnable is never set in the vendor driver
866          *
867          * SERVICE:
868          * - "for PLCP configuration"
869          * - always 0 except in some situations at 802.11b 11M
870          * - see line 53 of zdinlinef.h
871          */
872         cs->service = 0;
873         r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
874                                  le16_to_cpu(cs->tx_length));
875         if (r < 0)
876                 return r;
877         cs->current_length = cpu_to_le16(r);
878
879         if (next_frag_len == 0) {
880                 cs->next_frame_length = 0;
881         } else {
882                 r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
883                                          next_frag_len);
884                 if (r < 0)
885                         return r;
886                 cs->next_frame_length = cpu_to_le16(r);
887         }
888
889         return 0;
890 }
891
892 static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
893 {
894         int i, r;
895
896         for (i = 0; i < txb->nr_frags; i++) {
897                 struct sk_buff *skb = txb->fragments[i];
898
899                 r = fill_ctrlset(mac, txb, i);
900                 if (r)
901                         return r;
902                 r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
903                 if (r)
904                         return r;
905         }
906
907         /* FIXME: shouldn't this be handled by the upper layers? */
908         mac->netdev->trans_start = jiffies;
909
910         ieee80211_txb_free(txb);
911         return 0;
912 }
913
914 struct zd_rt_hdr {
915         struct ieee80211_radiotap_header rt_hdr;
916         u8  rt_flags;
917         u8  rt_rate;
918         u16 rt_channel;
919         u16 rt_chbitmask;
920 } __attribute__((packed));
921
922 static void fill_rt_header(void *buffer, struct zd_mac *mac,
923                            const struct ieee80211_rx_stats *stats,
924                            const struct rx_status *status)
925 {
926         struct zd_rt_hdr *hdr = buffer;
927
928         hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
929         hdr->rt_hdr.it_pad = 0;
930         hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
931         hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
932                                  (1 << IEEE80211_RADIOTAP_CHANNEL) |
933                                  (1 << IEEE80211_RADIOTAP_RATE));
934
935         hdr->rt_flags = 0;
936         if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
937                 hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
938
939         hdr->rt_rate = stats->rate / 5;
940
941         /* FIXME: 802.11a */
942         hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
943                                              _zd_chip_get_channel(&mac->chip)));
944         hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
945                 ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
946                 ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
947 }
948
949 /* Returns 1 if the data packet is for us and 0 otherwise. */
950 static int is_data_packet_for_us(struct ieee80211_device *ieee,
951                                  struct ieee80211_hdr_4addr *hdr)
952 {
953         struct net_device *netdev = ieee->dev;
954         u16 fc = le16_to_cpu(hdr->frame_ctl);
955
956         ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
957
958         switch (ieee->iw_mode) {
959         case IW_MODE_ADHOC:
960                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
961                     memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) != 0)
962                         return 0;
963                 break;
964         case IW_MODE_AUTO:
965         case IW_MODE_INFRA:
966                 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
967                     IEEE80211_FCTL_FROMDS ||
968                     memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) != 0)
969                         return 0;
970                 break;
971         default:
972                 ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
973                 return 0;
974         }
975
976         return memcmp(hdr->addr1, netdev->dev_addr, ETH_ALEN) == 0 ||
977                (is_multicast_ether_addr(hdr->addr1) &&
978                 memcmp(hdr->addr3, netdev->dev_addr, ETH_ALEN) != 0) ||
979                (netdev->flags & IFF_PROMISC);
980 }
981
982 /* Filters received packets. The function returns 1 if the packet should be
983  * forwarded to ieee80211_rx(). If the packet should be ignored the function
984  * returns 0. If an invalid packet is found the function returns -EINVAL.
985  *
986  * The function calls ieee80211_rx_mgt() directly.
987  *
988  * It has been based on ieee80211_rx_any.
989  */
990 static int filter_rx(struct ieee80211_device *ieee,
991                      const u8 *buffer, unsigned int length,
992                      struct ieee80211_rx_stats *stats)
993 {
994         struct ieee80211_hdr_4addr *hdr;
995         u16 fc;
996
997         if (ieee->iw_mode == IW_MODE_MONITOR)
998                 return 1;
999
1000         hdr = (struct ieee80211_hdr_4addr *)buffer;
1001         fc = le16_to_cpu(hdr->frame_ctl);
1002         if ((fc & IEEE80211_FCTL_VERS) != 0)
1003                 return -EINVAL;
1004
1005         switch (WLAN_FC_GET_TYPE(fc)) {
1006         case IEEE80211_FTYPE_MGMT:
1007                 if (length < sizeof(struct ieee80211_hdr_3addr))
1008                         return -EINVAL;
1009                 ieee80211_rx_mgt(ieee, hdr, stats);
1010                 return 0;
1011         case IEEE80211_FTYPE_CTL:
1012                 return 0;
1013         case IEEE80211_FTYPE_DATA:
1014                 /* Ignore invalid short buffers */
1015                 if (length < sizeof(struct ieee80211_hdr_3addr))
1016                         return -EINVAL;
1017                 return is_data_packet_for_us(ieee, hdr);
1018         }
1019
1020         return -EINVAL;
1021 }
1022
1023 static void update_qual_rssi(struct zd_mac *mac,
1024                              const u8 *buffer, unsigned int length,
1025                              u8 qual_percent, u8 rssi_percent)
1026 {
1027         unsigned long flags;
1028         struct ieee80211_hdr_3addr *hdr;
1029         int i;
1030
1031         hdr = (struct ieee80211_hdr_3addr *)buffer;
1032         if (length < offsetof(struct ieee80211_hdr_3addr, addr3))
1033                 return;
1034         if (memcmp(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid, ETH_ALEN) != 0)
1035                 return;
1036
1037         spin_lock_irqsave(&mac->lock, flags);
1038         i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE;
1039         mac->qual_buffer[i] = qual_percent;
1040         mac->rssi_buffer[i] = rssi_percent;
1041         mac->stats_count++;
1042         spin_unlock_irqrestore(&mac->lock, flags);
1043 }
1044
1045 static int fill_rx_stats(struct ieee80211_rx_stats *stats,
1046                          const struct rx_status **pstatus,
1047                          struct zd_mac *mac,
1048                          const u8 *buffer, unsigned int length)
1049 {
1050         const struct rx_status *status;
1051
1052         *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status));
1053         if (status->frame_status & ZD_RX_ERROR) {
1054                 /* FIXME: update? */
1055                 return -EINVAL;
1056         }
1057         memset(stats, 0, sizeof(struct ieee80211_rx_stats));
1058         stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
1059                                + sizeof(struct rx_status));
1060         /* FIXME: 802.11a */
1061         stats->freq = IEEE80211_24GHZ_BAND;
1062         stats->received_channel = _zd_chip_get_channel(&mac->chip);
1063         stats->rssi = zd_rx_strength_percent(status->signal_strength);
1064         stats->signal = zd_rx_qual_percent(buffer,
1065                                           length - sizeof(struct rx_status),
1066                                           status);
1067         stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
1068         stats->rate = zd_rx_rate(buffer, status);
1069         if (stats->rate)
1070                 stats->mask |= IEEE80211_STATMASK_RATE;
1071
1072         return 0;
1073 }
1074
1075 int zd_mac_rx(struct zd_mac *mac, const u8 *buffer, unsigned int length)
1076 {
1077         int r;
1078         struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1079         struct ieee80211_rx_stats stats;
1080         const struct rx_status *status;
1081         struct sk_buff *skb;
1082
1083         if (length < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
1084                      IEEE80211_FCS_LEN + sizeof(struct rx_status))
1085                 return -EINVAL;
1086
1087         r = fill_rx_stats(&stats, &status, mac, buffer, length);
1088         if (r)
1089                 return r;
1090
1091         length -= ZD_PLCP_HEADER_SIZE+IEEE80211_FCS_LEN+
1092                   sizeof(struct rx_status);
1093         buffer += ZD_PLCP_HEADER_SIZE;
1094
1095         update_qual_rssi(mac, buffer, length, stats.signal, stats.rssi);
1096
1097         r = filter_rx(ieee, buffer, length, &stats);
1098         if (r <= 0)
1099                 return r;
1100
1101         skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
1102         if (!skb)
1103                 return -ENOMEM;
1104         if (ieee->iw_mode == IW_MODE_MONITOR)
1105                 fill_rt_header(skb_put(skb, sizeof(struct zd_rt_hdr)), mac,
1106                                &stats, status);
1107         memcpy(skb_put(skb, length), buffer, length);
1108
1109         r = ieee80211_rx(ieee, skb, &stats);
1110         if (!r)
1111                 dev_kfree_skb_any(skb);
1112         return 0;
1113 }
1114
1115 static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
1116                      int pri)
1117 {
1118         return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
1119 }
1120
1121 static void set_security(struct net_device *netdev,
1122                          struct ieee80211_security *sec)
1123 {
1124         struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
1125         struct ieee80211_security *secinfo = &ieee->sec;
1126         int keyidx;
1127
1128         dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
1129
1130         for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
1131                 if (sec->flags & (1<<keyidx)) {
1132                         secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
1133                         secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
1134                         memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
1135                                SCM_KEY_LEN);
1136                 }
1137
1138         if (sec->flags & SEC_ACTIVE_KEY) {
1139                 secinfo->active_key = sec->active_key;
1140                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1141                         "   .active_key = %d\n", sec->active_key);
1142         }
1143         if (sec->flags & SEC_UNICAST_GROUP) {
1144                 secinfo->unicast_uses_group = sec->unicast_uses_group;
1145                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1146                         "   .unicast_uses_group = %d\n",
1147                         sec->unicast_uses_group);
1148         }
1149         if (sec->flags & SEC_LEVEL) {
1150                 secinfo->level = sec->level;
1151                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1152                         "   .level = %d\n", sec->level);
1153         }
1154         if (sec->flags & SEC_ENABLED) {
1155                 secinfo->enabled = sec->enabled;
1156                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1157                         "   .enabled = %d\n", sec->enabled);
1158         }
1159         if (sec->flags & SEC_ENCRYPT) {
1160                 secinfo->encrypt = sec->encrypt;
1161                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1162                         "   .encrypt = %d\n", sec->encrypt);
1163         }
1164         if (sec->flags & SEC_AUTH_MODE) {
1165                 secinfo->auth_mode = sec->auth_mode;
1166                 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1167                         "   .auth_mode = %d\n", sec->auth_mode);
1168         }
1169 }
1170
1171 static void ieee_init(struct ieee80211_device *ieee)
1172 {
1173         ieee->mode = IEEE_B | IEEE_G;
1174         ieee->freq_band = IEEE80211_24GHZ_BAND;
1175         ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
1176         ieee->tx_headroom = sizeof(struct zd_ctrlset);
1177         ieee->set_security = set_security;
1178         ieee->hard_start_xmit = netdev_tx;
1179
1180         /* Software encryption/decryption for now */
1181         ieee->host_build_iv = 0;
1182         ieee->host_encrypt = 1;
1183         ieee->host_decrypt = 1;
1184
1185         /* FIXME: default to managed mode, until ieee80211 and zd1211rw can
1186          * correctly support AUTO */
1187         ieee->iw_mode = IW_MODE_INFRA;
1188 }
1189
1190 static void softmac_init(struct ieee80211softmac_device *sm)
1191 {
1192         sm->set_channel = set_channel;
1193         sm->bssinfo_change = bssinfo_change;
1194 }
1195
1196 struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
1197 {
1198         struct zd_mac *mac = zd_netdev_mac(ndev);
1199         struct iw_statistics *iw_stats = &mac->iw_stats;
1200         unsigned int i, count, qual_total, rssi_total;
1201
1202         memset(iw_stats, 0, sizeof(struct iw_statistics));
1203         /* We are not setting the status, because ieee->state is not updated
1204          * at all and this driver doesn't track authentication state.
1205          */
1206         spin_lock_irq(&mac->lock);
1207         count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ?
1208                 mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE;
1209         qual_total = rssi_total = 0;
1210         for (i = 0; i < count; i++) {
1211                 qual_total += mac->qual_buffer[i];
1212                 rssi_total += mac->rssi_buffer[i];
1213         }
1214         spin_unlock_irq(&mac->lock);
1215         iw_stats->qual.updated = IW_QUAL_NOISE_INVALID;
1216         if (count > 0) {
1217                 iw_stats->qual.qual = qual_total / count;
1218                 iw_stats->qual.level = rssi_total / count;
1219                 iw_stats->qual.updated |=
1220                         IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED;
1221         } else {
1222                 iw_stats->qual.updated |=
1223                         IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID;
1224         }
1225         /* TODO: update counter */
1226         return iw_stats;
1227 }
1228
1229 #define LINK_LED_WORK_DELAY HZ
1230
1231 static void link_led_handler(struct work_struct *work)
1232 {
1233         struct zd_mac *mac =
1234                 container_of(work, struct zd_mac, housekeeping.link_led_work.work);
1235         struct zd_chip *chip = &mac->chip;
1236         struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev);
1237         int is_associated;
1238         int r;
1239
1240         spin_lock_irq(&mac->lock);
1241         is_associated = sm->associnfo.associated != 0;
1242         spin_unlock_irq(&mac->lock);
1243
1244         r = zd_chip_control_leds(chip,
1245                                  is_associated ? LED_ASSOCIATED : LED_SCANNING);
1246         if (r)
1247                 dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
1248
1249         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1250                            LINK_LED_WORK_DELAY);
1251 }
1252
1253 static void housekeeping_init(struct zd_mac *mac)
1254 {
1255         INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
1256 }
1257
1258 static void housekeeping_enable(struct zd_mac *mac)
1259 {
1260         dev_dbg_f(zd_mac_dev(mac), "\n");
1261         queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1262                            0);
1263 }
1264
1265 static void housekeeping_disable(struct zd_mac *mac)
1266 {
1267         dev_dbg_f(zd_mac_dev(mac), "\n");
1268         cancel_rearming_delayed_workqueue(zd_workqueue,
1269                 &mac->housekeeping.link_led_work);
1270         zd_chip_control_leds(&mac->chip, LED_OFF);
1271 }