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[HOSTAP]: set netdev type before registering AP interface
[deliverable/linux.git] / drivers / net / wireless / zd1211rw / zd_mac.c
CommitLineData
e85d0918
DD		 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
33static void ieee_init(struct ieee80211_device *ieee);
34static void softmac_init(struct ieee80211softmac_device *sm);
6d5aefb8
DH		 35static void set_rts_cts_work(struct work_struct *work);
36static void set_basic_rates_work(struct work_struct *work);
e85d0918 37
583afd1e
UK		 38static void housekeeping_init(struct zd_mac *mac);
39static void housekeeping_enable(struct zd_mac *mac);
40static void housekeeping_disable(struct zd_mac *mac);
41
0ae85135 42static void set_multicast_hash_handler(struct work_struct *work);
9cdac965 43
4d1feabc
UK		 44static void do_rx(unsigned long mac_ptr);
45
e85d0918
DD		 46int 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;
6d5aefb8
DH		 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);
e85d0918 57
4d1feabc
UK		 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
e85d0918
DD		 62 ieee_init(ieee);
63 softmac_init(ieee80211_priv(netdev));
64 zd_chip_init(&mac->chip, netdev, intf);
583afd1e 65 housekeeping_init(mac);
0ae85135 66 INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler);
e85d0918
DD		 67 return 0;
68}
69
70static 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;
84out:
85 spin_unlock_irqrestore(&mac->lock, flags);
86 return r;
87}
88
74553aed 89int zd_mac_preinit_hw(struct zd_mac *mac)
e85d0918
DD		 90{
91 int r;
e85d0918 92 u8 addr[ETH_ALEN];
74553aed
DD		 93
94 r = zd_chip_read_mac_addr_fw(&mac->chip, addr);
95 if (r)
96 return r;
97
98 memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
99 return 0;
100}
101
102int zd_mac_init_hw(struct zd_mac *mac)
103{
104 int r;
105 struct zd_chip *chip = &mac->chip;
e85d0918
DD		 106 u8 default_regdomain;
107
108 r = zd_chip_enable_int(chip);
109 if (r)
110 goto out;
74553aed 111 r = zd_chip_init_hw(chip);
e85d0918
DD		 112 if (r)
113 goto disable_int;
114
e85d0918 115 ZD_ASSERT(!irqs_disabled());
e85d0918
DD		 116
117 r = zd_read_regdomain(chip, &default_regdomain);
118 if (r)
119 goto disable_int;
120 if (!zd_regdomain_supported(default_regdomain)) {
86d95c21
DD		 121 /* The vendor driver overrides the regulatory domain and
122 * allowed channel registers and unconditionally restricts
123 * available channels to 1-11 everywhere. Match their
124 * questionable behaviour only for regdomains which we don't
125 * recognise. */
126 dev_warn(zd_mac_dev(mac), "Unrecognised regulatory domain: "
127 "%#04x. Defaulting to FCC.\n", default_regdomain);
128 default_regdomain = ZD_REGDOMAIN_FCC;
e85d0918
DD		 129 }
130 spin_lock_irq(&mac->lock);
131 mac->regdomain = mac->default_regdomain = default_regdomain;
132 spin_unlock_irq(&mac->lock);
133 r = reset_channel(mac);
134 if (r)
135 goto disable_int;
136
40da08bc
DD		 137 /* We must inform the device that we are doing encryption/decryption in
138 * software at the moment. */
139 r = zd_set_encryption_type(chip, ENC_SNIFFER);
e85d0918
DD		 140 if (r)
141 goto disable_int;
142
143 r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
144 if (r)
145 goto disable_int;
146
147 r = 0;
148disable_int:
149 zd_chip_disable_int(chip);
150out:
151 return r;
152}
153
154void zd_mac_clear(struct zd_mac *mac)
155{
9cdac965 156 flush_workqueue(zd_workqueue);
4d1feabc
UK		 157 skb_queue_purge(&mac->rx_queue);
158 tasklet_kill(&mac->rx_tasklet);
e85d0918 159 zd_chip_clear(&mac->chip);
c48cf125
UK		 160 ZD_ASSERT(!spin_is_locked(&mac->lock));
161 ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
e85d0918
DD		 162}
163
c5691235 164static int set_rx_filter(struct zd_mac *mac)
e85d0918
DD		 165{
166 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
44713b1d
DD		 167 u32 filter = (ieee->iw_mode == IW_MODE_MONITOR) ? ~0 : STA_RX_FILTER;
168 return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter);
e85d0918
DD		 169}
170
c5691235
UK		 171static int set_sniffer(struct zd_mac *mac)
172{
173 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
174 return zd_iowrite32(&mac->chip, CR_SNIFFER_ON,
175 ieee->iw_mode == IW_MODE_MONITOR ? 1 : 0);
176 return 0;
177}
178
179static int set_mc_hash(struct zd_mac *mac)
180{
181 struct zd_mc_hash hash;
182 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
183
184 zd_mc_clear(&hash);
185 if (ieee->iw_mode == IW_MODE_MONITOR)
186 zd_mc_add_all(&hash);
187
188 return zd_chip_set_multicast_hash(&mac->chip, &hash);
189}
190
e85d0918
DD		 191int zd_mac_open(struct net_device *netdev)
192{
193 struct zd_mac *mac = zd_netdev_mac(netdev);
194 struct zd_chip *chip = &mac->chip;
74553aed 195 struct zd_usb *usb = &chip->usb;
e85d0918
DD		 196 int r;
197
74553aed
DD		 198 if (!usb->initialized) {
199 r = zd_usb_init_hw(usb);
200 if (r)
201 goto out;
202 }
203
4d1feabc
UK		 204 tasklet_enable(&mac->rx_tasklet);
205
e85d0918
DD		 206 r = zd_chip_enable_int(chip);
207 if (r < 0)
208 goto out;
209
74553aed
DD		 210 r = zd_write_mac_addr(chip, netdev->dev_addr);
211 if (r)
212 goto disable_int;
213
e85d0918
DD		 214 r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
215 if (r < 0)
216 goto disable_int;
c5691235
UK		 217 r = set_rx_filter(mac);
218 if (r)
219 goto disable_int;
220 r = set_sniffer(mac);
221 if (r)
222 goto disable_int;
223 r = set_mc_hash(mac);
e85d0918
DD		 224 if (r)
225 goto disable_int;
226 r = zd_chip_switch_radio_on(chip);
227 if (r < 0)
228 goto disable_int;
229 r = zd_chip_set_channel(chip, mac->requested_channel);
230 if (r < 0)
231 goto disable_radio;
232 r = zd_chip_enable_rx(chip);
233 if (r < 0)
234 goto disable_radio;
235 r = zd_chip_enable_hwint(chip);
236 if (r < 0)
237 goto disable_rx;
238
583afd1e 239 housekeeping_enable(mac);
e85d0918
DD		 240 ieee80211softmac_start(netdev);
241 return 0;
242disable_rx:
243 zd_chip_disable_rx(chip);
244disable_radio:
245 zd_chip_switch_radio_off(chip);
246disable_int:
247 zd_chip_disable_int(chip);
248out:
249 return r;
250}
251
252int zd_mac_stop(struct net_device *netdev)
253{
254 struct zd_mac *mac = zd_netdev_mac(netdev);
255 struct zd_chip *chip = &mac->chip;
256
c9a4b35d
DD		 257 netif_stop_queue(netdev);
258
e85d0918
DD		 259 /*
260 * The order here deliberately is a little different from the open()
261 * method, since we need to make sure there is no opportunity for RX
262 * frames to be processed by softmac after we have stopped it.
263 */
264
265 zd_chip_disable_rx(chip);
4d1feabc
UK		 266 skb_queue_purge(&mac->rx_queue);
267 tasklet_disable(&mac->rx_tasklet);
583afd1e 268 housekeeping_disable(mac);
e85d0918
DD		 269 ieee80211softmac_stop(netdev);
270
b1382ede
DD		 271 /* Ensure no work items are running or queued from this point */
272 cancel_delayed_work(&mac->set_rts_cts_work);
273 cancel_delayed_work(&mac->set_basic_rates_work);
274 flush_workqueue(zd_workqueue);
275 mac->updating_rts_rate = 0;
276 mac->updating_basic_rates = 0;
277
e85d0918
DD		 278 zd_chip_disable_hwint(chip);
279 zd_chip_switch_radio_off(chip);
280 zd_chip_disable_int(chip);
281
282 return 0;
283}
284
285int zd_mac_set_mac_address(struct net_device *netdev, void *p)
286{
287 int r;
288 unsigned long flags;
289 struct sockaddr *addr = p;
290 struct zd_mac *mac = zd_netdev_mac(netdev);
291 struct zd_chip *chip = &mac->chip;
0795af57 292 DECLARE_MAC_BUF(mac2);
e85d0918
DD		 293
294 if (!is_valid_ether_addr(addr->sa_data))
295 return -EADDRNOTAVAIL;
296
297 dev_dbg_f(zd_mac_dev(mac),
0795af57 298 "Setting MAC to %s\n", print_mac(mac2, addr->sa_data));
e85d0918 299
74553aed
DD		 300 if (netdev->flags & IFF_UP) {
301 r = zd_write_mac_addr(chip, addr->sa_data);
302 if (r)
303 return r;
304 }
e85d0918
DD		 305
306 spin_lock_irqsave(&mac->lock, flags);
307 memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
308 spin_unlock_irqrestore(&mac->lock, flags);
309
310 return 0;
311}
312
0ae85135 313static void set_multicast_hash_handler(struct work_struct *work)
9cdac965 314{
0ae85135
JG		 315 struct zd_mac *mac = container_of(work, struct zd_mac,
316 set_multicast_hash_work);
9cdac965
UK		 317 struct zd_mc_hash hash;
318
319 spin_lock_irq(&mac->lock);
320 hash = mac->multicast_hash;
321 spin_unlock_irq(&mac->lock);
322
323 zd_chip_set_multicast_hash(&mac->chip, &hash);
324}
325
326void zd_mac_set_multicast_list(struct net_device *dev)
327{
9cdac965 328 struct zd_mac *mac = zd_netdev_mac(dev);
c5691235
UK		 329 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
330 struct zd_mc_hash hash;
9cdac965
UK		 331 struct dev_mc_list *mc;
332 unsigned long flags;
0795af57 333 DECLARE_MAC_BUF(mac2);
9cdac965 334
c5691235
UK		 335 if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI) ||
336 ieee->iw_mode == IW_MODE_MONITOR) {
9cdac965
UK		 337 zd_mc_add_all(&hash);
338 } else {
339 zd_mc_clear(&hash);
340 for (mc = dev->mc_list; mc; mc = mc->next) {
0795af57
JP		 341 dev_dbg_f(zd_mac_dev(mac), "mc addr %s\n",
342 print_mac(mac2, mc->dmi_addr));
9cdac965
UK		 343 zd_mc_add_addr(&hash, mc->dmi_addr);
344 }
345 }
346
347 spin_lock_irqsave(&mac->lock, flags);
348 mac->multicast_hash = hash;
349 spin_unlock_irqrestore(&mac->lock, flags);
350 queue_work(zd_workqueue, &mac->set_multicast_hash_work);
351}
352
e85d0918
DD		 353int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
354{
355 int r;
356 u8 channel;
357
358 ZD_ASSERT(!irqs_disabled());
359 spin_lock_irq(&mac->lock);
360 if (regdomain == 0) {
361 regdomain = mac->default_regdomain;
362 }
363 if (!zd_regdomain_supported(regdomain)) {
364 spin_unlock_irq(&mac->lock);
365 return -EINVAL;
366 }
367 mac->regdomain = regdomain;
368 channel = mac->requested_channel;
369 spin_unlock_irq(&mac->lock);
370
371 r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
372 if (r)
373 return r;
374 if (!zd_regdomain_supports_channel(regdomain, channel)) {
375 r = reset_channel(mac);
376 if (r)
377 return r;
378 }
379
380 return 0;
381}
382
383u8 zd_mac_get_regdomain(struct zd_mac *mac)
384{
385 unsigned long flags;
386 u8 regdomain;
387
388 spin_lock_irqsave(&mac->lock, flags);
389 regdomain = mac->regdomain;
390 spin_unlock_irqrestore(&mac->lock, flags);
391 return regdomain;
392}
393
b1382ede
DD		 394/* Fallback to lowest rate, if rate is unknown. */
395static u8 rate_to_zd_rate(u8 rate)
396{
397 switch (rate) {
398 case IEEE80211_CCK_RATE_2MB:
399 return ZD_CCK_RATE_2M;
400 case IEEE80211_CCK_RATE_5MB:
401 return ZD_CCK_RATE_5_5M;
402 case IEEE80211_CCK_RATE_11MB:
403 return ZD_CCK_RATE_11M;
404 case IEEE80211_OFDM_RATE_6MB:
405 return ZD_OFDM_RATE_6M;
406 case IEEE80211_OFDM_RATE_9MB:
407 return ZD_OFDM_RATE_9M;
408 case IEEE80211_OFDM_RATE_12MB:
409 return ZD_OFDM_RATE_12M;
410 case IEEE80211_OFDM_RATE_18MB:
411 return ZD_OFDM_RATE_18M;
412 case IEEE80211_OFDM_RATE_24MB:
413 return ZD_OFDM_RATE_24M;
414 case IEEE80211_OFDM_RATE_36MB:
415 return ZD_OFDM_RATE_36M;
416 case IEEE80211_OFDM_RATE_48MB:
417 return ZD_OFDM_RATE_48M;
418 case IEEE80211_OFDM_RATE_54MB:
419 return ZD_OFDM_RATE_54M;
420 }
421 return ZD_CCK_RATE_1M;
422}
423
424static u16 rate_to_cr_rate(u8 rate)
425{
426 switch (rate) {
427 case IEEE80211_CCK_RATE_2MB:
428 return CR_RATE_1M;
429 case IEEE80211_CCK_RATE_5MB:
430 return CR_RATE_5_5M;
431 case IEEE80211_CCK_RATE_11MB:
432 return CR_RATE_11M;
433 case IEEE80211_OFDM_RATE_6MB:
434 return CR_RATE_6M;
435 case IEEE80211_OFDM_RATE_9MB:
436 return CR_RATE_9M;
437 case IEEE80211_OFDM_RATE_12MB:
438 return CR_RATE_12M;
439 case IEEE80211_OFDM_RATE_18MB:
440 return CR_RATE_18M;
441 case IEEE80211_OFDM_RATE_24MB:
442 return CR_RATE_24M;
443 case IEEE80211_OFDM_RATE_36MB:
444 return CR_RATE_36M;
445 case IEEE80211_OFDM_RATE_48MB:
446 return CR_RATE_48M;
447 case IEEE80211_OFDM_RATE_54MB:
448 return CR_RATE_54M;
449 }
450 return CR_RATE_1M;
451}
452
453static void try_enable_tx(struct zd_mac *mac)
454{
455 unsigned long flags;
456
457 spin_lock_irqsave(&mac->lock, flags);
458 if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
459 netif_wake_queue(mac->netdev);
460 spin_unlock_irqrestore(&mac->lock, flags);
461}
462
6d5aefb8 463static void set_rts_cts_work(struct work_struct *work)
b1382ede 464{
6d5aefb8
DH		 465 struct zd_mac *mac =
466 container_of(work, struct zd_mac, set_rts_cts_work.work);
b1382ede
DD		 467 unsigned long flags;
468 u8 rts_rate;
469 unsigned int short_preamble;
470
471 mutex_lock(&mac->chip.mutex);
472
473 spin_lock_irqsave(&mac->lock, flags);
474 mac->updating_rts_rate = 0;
475 rts_rate = mac->rts_rate;
476 short_preamble = mac->short_preamble;
477 spin_unlock_irqrestore(&mac->lock, flags);
478
479 zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
480 mutex_unlock(&mac->chip.mutex);
481
482 try_enable_tx(mac);
483}
484
6d5aefb8 485static void set_basic_rates_work(struct work_struct *work)
b1382ede 486{
6d5aefb8
DH		 487 struct zd_mac *mac =
488 container_of(work, struct zd_mac, set_basic_rates_work.work);
b1382ede
DD		 489 unsigned long flags;
490 u16 basic_rates;
491
492 mutex_lock(&mac->chip.mutex);
493
494 spin_lock_irqsave(&mac->lock, flags);
495 mac->updating_basic_rates = 0;
496 basic_rates = mac->basic_rates;
497 spin_unlock_irqrestore(&mac->lock, flags);
498
499 zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
500 mutex_unlock(&mac->chip.mutex);
501
502 try_enable_tx(mac);
503}
504
505static void bssinfo_change(struct net_device *netdev, u32 changes)
506{
507 struct zd_mac *mac = zd_netdev_mac(netdev);
508 struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
509 struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
510 int need_set_rts_cts = 0;
511 int need_set_rates = 0;
512 u16 basic_rates;
513 unsigned long flags;
514
515 dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
516
517 if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
518 spin_lock_irqsave(&mac->lock, flags);
519 mac->short_preamble = bssinfo->short_preamble;
520 spin_unlock_irqrestore(&mac->lock, flags);
521 need_set_rts_cts = 1;
522 }
523
524 if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
525 /* Set RTS rate to highest available basic rate */
4d1feabc 526 u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac,
b1382ede 527 &bssinfo->supported_rates, 1);
4d1feabc 528 hi_rate = rate_to_zd_rate(hi_rate);
b1382ede
DD		 529
530 spin_lock_irqsave(&mac->lock, flags);
4d1feabc
UK		 531 if (hi_rate != mac->rts_rate) {
532 mac->rts_rate = hi_rate;
b1382ede
DD		 533 need_set_rts_cts = 1;
534 }
535 spin_unlock_irqrestore(&mac->lock, flags);
536
537 /* Set basic rates */
538 need_set_rates = 1;
539 if (bssinfo->supported_rates.count == 0) {
540 /* Allow the device to be flexible */
541 basic_rates = CR_RATES_80211B | CR_RATES_80211G;
542 } else {
543 int i = 0;
544 basic_rates = 0;
545
546 for (i = 0; i < bssinfo->supported_rates.count; i++) {
547 u16 rate = bssinfo->supported_rates.rates[i];
548 if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
549 continue;
550
551 rate &= ~IEEE80211_BASIC_RATE_MASK;
552 basic_rates |= rate_to_cr_rate(rate);
553 }
554 }
555 spin_lock_irqsave(&mac->lock, flags);
556 mac->basic_rates = basic_rates;
557 spin_unlock_irqrestore(&mac->lock, flags);
558 }
559
560 /* Schedule any changes we made above */
561
562 spin_lock_irqsave(&mac->lock, flags);
563 if (need_set_rts_cts && !mac->updating_rts_rate) {
564 mac->updating_rts_rate = 1;
565 netif_stop_queue(mac->netdev);
6d5aefb8 566 queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0);
b1382ede
DD		 567 }
568 if (need_set_rates && !mac->updating_basic_rates) {
569 mac->updating_basic_rates = 1;
570 netif_stop_queue(mac->netdev);
6d5aefb8
DH		 571 queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work,
572 0);
b1382ede
DD		 573 }
574 spin_unlock_irqrestore(&mac->lock, flags);
575}
576
e85d0918
DD		 577static void set_channel(struct net_device *netdev, u8 channel)
578{
579 struct zd_mac *mac = zd_netdev_mac(netdev);
580
581 dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
582
583 zd_chip_set_channel(&mac->chip, channel);
584}
585
e85d0918
DD		 586int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
587{
588 unsigned long lock_flags;
589 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
590
591 if (ieee->iw_mode == IW_MODE_INFRA)
592 return -EPERM;
593
594 spin_lock_irqsave(&mac->lock, lock_flags);
595 if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
596 spin_unlock_irqrestore(&mac->lock, lock_flags);
597 return -EINVAL;
598 }
599 mac->requested_channel = channel;
600 spin_unlock_irqrestore(&mac->lock, lock_flags);
601 if (netif_running(mac->netdev))
602 return zd_chip_set_channel(&mac->chip, channel);
603 else
604 return 0;
605}
606
84bc715c 607u8 zd_mac_get_channel(struct zd_mac *mac)
e85d0918 608{
84bc715c 609 u8 channel = zd_chip_get_channel(&mac->chip);
e85d0918 610
84bc715c
DD		 611 dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel);
612 return channel;
e85d0918
DD		 613}
614
e85d0918
DD		 615int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
616{
617 struct ieee80211_device *ieee;
618
619 switch (mode) {
620 case IW_MODE_AUTO:
621 case IW_MODE_ADHOC:
622 case IW_MODE_INFRA:
623 mac->netdev->type = ARPHRD_ETHER;
624 break;
625 case IW_MODE_MONITOR:
626 mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
627 break;
628 default:
629 dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
630 return -EINVAL;
631 }
632
633 ieee = zd_mac_to_ieee80211(mac);
634 ZD_ASSERT(!irqs_disabled());
635 spin_lock_irq(&ieee->lock);
636 ieee->iw_mode = mode;
637 spin_unlock_irq(&ieee->lock);
638
c5691235
UK		 639 if (netif_running(mac->netdev)) {
640 int r = set_rx_filter(mac);
641 if (r)
642 return r;
643 return set_sniffer(mac);
644 }
e85d0918
DD		 645
646 return 0;
647}
648
649int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
650{
651 unsigned long flags;
652 struct ieee80211_device *ieee;
653
654 ieee = zd_mac_to_ieee80211(mac);
655 spin_lock_irqsave(&ieee->lock, flags);
656 *mode = ieee->iw_mode;
657 spin_unlock_irqrestore(&ieee->lock, flags);
658 return 0;
659}
660
661int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
662{
663 int i;
664 const struct channel_range *channel_range;
665 u8 regdomain;
666
667 memset(range, 0, sizeof(*range));
668
669 /* FIXME: Not so important and depends on the mode. For 802.11g
670 * usually this value is used. It seems to be that Bit/s number is
671 * given here.
672 */
673 range->throughput = 27 * 1000 * 1000;
674
675 range->max_qual.qual = 100;
676 range->max_qual.level = 100;
677
678 /* FIXME: Needs still to be tuned. */
679 range->avg_qual.qual = 71;
680 range->avg_qual.level = 80;
681
682 /* FIXME: depends on standard? */
683 range->min_rts = 256;
684 range->max_rts = 2346;
685
686 range->min_frag = MIN_FRAG_THRESHOLD;
687 range->max_frag = MAX_FRAG_THRESHOLD;
688
689 range->max_encoding_tokens = WEP_KEYS;
690 range->num_encoding_sizes = 2;
691 range->encoding_size[0] = 5;
692 range->encoding_size[1] = WEP_KEY_LEN;
693
694 range->we_version_compiled = WIRELESS_EXT;
695 range->we_version_source = 20;
696
ff9b99bc
DD		 697 range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
698 IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
699
e85d0918
DD		 700 ZD_ASSERT(!irqs_disabled());
701 spin_lock_irq(&mac->lock);
702 regdomain = mac->regdomain;
703 spin_unlock_irq(&mac->lock);
704 channel_range = zd_channel_range(regdomain);
705
706 range->num_channels = channel_range->end - channel_range->start;
707 range->old_num_channels = range->num_channels;
708 range->num_frequency = range->num_channels;
709 range->old_num_frequency = range->num_frequency;
710
711 for (i = 0; i < range->num_frequency; i++) {
712 struct iw_freq *freq = &range->freq[i];
713 freq->i = channel_range->start + i;
714 zd_channel_to_freq(freq, freq->i);
715 }
716
717 return 0;
718}
719
b1cd8416 720static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
e85d0918 721{
64f222cc
UK		 722 /* ZD_PURE_RATE() must be used to remove the modulation type flag of
723 * the zd-rate values. */
e85d0918 724 static const u8 rate_divisor[] = {
64f222cc
UK		 725 [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1,
726 [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2,
727
728 /* bits must be doubled */
729 [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11,
730
731 [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11,
732 [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6,
733 [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9,
734 [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12,
735 [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18,
736 [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24,
737 [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36,
738 [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48,
739 [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54,
e85d0918
DD		 740 };
741
742 u32 bits = (u32)tx_length * 8;
743 u32 divisor;
744
64f222cc 745 divisor = rate_divisor[ZD_PURE_RATE(zd_rate)];
e85d0918
DD		 746 if (divisor == 0)
747 return -EINVAL;
748
b1cd8416
DD		 749 switch (zd_rate) {
750 case ZD_CCK_RATE_5_5M:
e85d0918
DD		 751 bits = (2*bits) + 10; /* round up to the next integer */
752 break;
b1cd8416 753 case ZD_CCK_RATE_11M:
e85d0918
DD		 754 if (service) {
755 u32 t = bits % 11;
756 *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
757 if (0 < t && t <= 3) {
758 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
759 }
760 }
761 bits += 10; /* round up to the next integer */
762 break;
763 }
764
765 return bits/divisor;
766}
767
e85d0918
DD		 768static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
769 struct ieee80211_hdr_4addr *hdr)
770{
771 struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
772 u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
64f222cc 773 u8 rate;
e85d0918 774 int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
b1382ede
DD		 775 int is_multicast = is_multicast_ether_addr(hdr->addr1);
776 int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
777 is_multicast, is_mgt);
e85d0918 778
b1382ede 779 rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
64f222cc 780 cs->modulation = rate_to_zd_rate(rate);
e85d0918 781
64f222cc
UK		 782 /* Set short preamble bit when appropriate */
783 if (short_preamble && ZD_MODULATION_TYPE(cs->modulation) == ZD_CCK
784 && cs->modulation != ZD_CCK_RATE_1M)
785 cs->modulation |= ZD_CCK_PREA_SHORT;
e85d0918
DD		 786}
787
788static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
789 struct ieee80211_hdr_4addr *header)
790{
b1382ede 791 struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
e85d0918
DD		 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 /*
b1382ede 798 * CONTROL TODO:
e85d0918
DD		 799 * - if backoff needed, enable bit 0
800 * - if burst (backoff not needed) disable bit 0
e85d0918
DD		 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 */
69dad6e5 814 if (ftype == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL)
e85d0918
DD		 815 cs->control |= ZD_CS_PS_POLL_FRAME;
816
b1382ede 817 /* Unicast data frames over the threshold should have RTS */
e85d0918 818 if (!is_multicast_ether_addr(header->addr1) &&
b1382ede
DD		 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 */
64f222cc 824 if (ZD_MODULATION_TYPE(cs->modulation) == ZD_OFDM &&
b1382ede
DD		 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;
e85d0918
DD		 829 }
830
831 /* FIXME: Management frame? */
832}
833
834static 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 */
74553aed 868 cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ?
e85d0918
DD		 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;
64f222cc 885 r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation),
e85d0918
DD		 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 {
64f222cc 894 r = zd_calc_tx_length_us(NULL, ZD_RATE(cs->modulation),
e85d0918
DD		 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
904static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
905{
906 int i, r;
22d3405f 907 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
e85d0918
DD		 908
909 for (i = 0; i < txb->nr_frags; i++) {
910 struct sk_buff *skb = txb->fragments[i];
911
912 r = fill_ctrlset(mac, txb, i);
22d3405f
UK		 913 if (r) {
914 ieee->stats.tx_dropped++;
e85d0918 915 return r;
22d3405f 916 }
e85d0918 917 r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
22d3405f
UK		 918 if (r) {
919 ieee->stats.tx_dropped++;
e85d0918 920 return r;
22d3405f 921 }
e85d0918
DD		 922 }
923
924 /* FIXME: shouldn't this be handled by the upper layers? */
925 mac->netdev->trans_start = jiffies;
926
927 ieee80211_txb_free(txb);
928 return 0;
929}
930
931struct zd_rt_hdr {
932 struct ieee80211_radiotap_header rt_hdr;
933 u8 rt_flags;
99f65f25 934 u8 rt_rate;
e85d0918
DD		 935 u16 rt_channel;
936 u16 rt_chbitmask;
a88556a4 937} __attribute__((packed));
e85d0918
DD		 938
939static void fill_rt_header(void *buffer, struct zd_mac *mac,
940 const struct ieee80211_rx_stats *stats,
941 const struct rx_status *status)
942{
943 struct zd_rt_hdr *hdr = buffer;
944
945 hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
946 hdr->rt_hdr.it_pad = 0;
947 hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
948 hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
949 (1 << IEEE80211_RADIOTAP_CHANNEL) |
950 (1 << IEEE80211_RADIOTAP_RATE));
951
952 hdr->rt_flags = 0;
953 if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
954 hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
955
99f65f25
UK		 956 hdr->rt_rate = stats->rate / 5;
957
e85d0918
DD		 958 /* FIXME: 802.11a */
959 hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
960 _zd_chip_get_channel(&mac->chip)));
961 hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
962 ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
963 ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
e85d0918
DD		 964}
965
966/* Returns 1 if the data packet is for us and 0 otherwise. */
967static int is_data_packet_for_us(struct ieee80211_device *ieee,
968 struct ieee80211_hdr_4addr *hdr)
969{
970 struct net_device *netdev = ieee->dev;
971 u16 fc = le16_to_cpu(hdr->frame_ctl);
972
973 ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
974
975 switch (ieee->iw_mode) {
976 case IW_MODE_ADHOC:
977 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
832855dc 978 compare_ether_addr(hdr->addr3, ieee->bssid) != 0)
e85d0918
DD		 979 return 0;
980 break;
981 case IW_MODE_AUTO:
982 case IW_MODE_INFRA:
983 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
984 IEEE80211_FCTL_FROMDS ||
832855dc 985 compare_ether_addr(hdr->addr2, ieee->bssid) != 0)
e85d0918
DD		 986 return 0;
987 break;
988 default:
989 ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
990 return 0;
991 }
992
832855dc 993 return compare_ether_addr(hdr->addr1, netdev->dev_addr) == 0 ||
9cdac965 994 (is_multicast_ether_addr(hdr->addr1) &&
832855dc 995 compare_ether_addr(hdr->addr3, netdev->dev_addr) != 0) ||
e85d0918
DD		 996 (netdev->flags & IFF_PROMISC);
997}
998
741fec53
UK		 999/* Filters received packets. The function returns 1 if the packet should be
1000 * forwarded to ieee80211_rx(). If the packet should be ignored the function
1001 * returns 0. If an invalid packet is found the function returns -EINVAL.
1002 *
1003 * The function calls ieee80211_rx_mgt() directly.
e85d0918
DD		 1004 *
1005 * It has been based on ieee80211_rx_any.
1006 */
1007static int filter_rx(struct ieee80211_device *ieee,
1008 const u8 *buffer, unsigned int length,
1009 struct ieee80211_rx_stats *stats)
1010{
1011 struct ieee80211_hdr_4addr *hdr;
1012 u16 fc;
1013
1014 if (ieee->iw_mode == IW_MODE_MONITOR)
1015 return 1;
1016
1017 hdr = (struct ieee80211_hdr_4addr *)buffer;
1018 fc = le16_to_cpu(hdr->frame_ctl);
1019 if ((fc & IEEE80211_FCTL_VERS) != 0)
1020 return -EINVAL;
1021
1022 switch (WLAN_FC_GET_TYPE(fc)) {
1023 case IEEE80211_FTYPE_MGMT:
1024 if (length < sizeof(struct ieee80211_hdr_3addr))
1025 return -EINVAL;
1026 ieee80211_rx_mgt(ieee, hdr, stats);
1027 return 0;
1028 case IEEE80211_FTYPE_CTL:
e85d0918
DD		 1029 return 0;
1030 case IEEE80211_FTYPE_DATA:
741fec53 1031 /* Ignore invalid short buffers */
e85d0918
DD		 1032 if (length < sizeof(struct ieee80211_hdr_3addr))
1033 return -EINVAL;
1034 return is_data_packet_for_us(ieee, hdr);
1035 }
1036
1037 return -EINVAL;
1038}
1039
db888aed
UK		 1040static void update_qual_rssi(struct zd_mac *mac,
1041 const u8 *buffer, unsigned int length,
1042 u8 qual_percent, u8 rssi_percent)
e85d0918
DD		 1043{
1044 unsigned long flags;
db888aed
UK		 1045 struct ieee80211_hdr_3addr *hdr;
1046 int i;
1047
1048 hdr = (struct ieee80211_hdr_3addr *)buffer;
1049 if (length < offsetof(struct ieee80211_hdr_3addr, addr3))
1050 return;
832855dc 1051 if (compare_ether_addr(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid) != 0)
db888aed 1052 return;
e85d0918
DD		 1053
1054 spin_lock_irqsave(&mac->lock, flags);
db888aed
UK		 1055 i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE;
1056 mac->qual_buffer[i] = qual_percent;
1057 mac->rssi_buffer[i] = rssi_percent;
1058 mac->stats_count++;
e85d0918
DD		 1059 spin_unlock_irqrestore(&mac->lock, flags);
1060}
1061
1062static int fill_rx_stats(struct ieee80211_rx_stats *stats,
1063 const struct rx_status **pstatus,
1064 struct zd_mac *mac,
1065 const u8 *buffer, unsigned int length)
1066{
1067 const struct rx_status *status;
1068
1069 *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status));
1070 if (status->frame_status & ZD_RX_ERROR) {
22d3405f
UK		 1071 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1072 ieee->stats.rx_errors++;
1073 if (status->frame_status & ZD_RX_TIMEOUT_ERROR)
1074 ieee->stats.rx_missed_errors++;
1075 else if (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR)
1076 ieee->stats.rx_fifo_errors++;
1077 else if (status->frame_status & ZD_RX_DECRYPTION_ERROR)
1078 ieee->ieee_stats.rx_discards_undecryptable++;
1079 else if (status->frame_status & ZD_RX_CRC32_ERROR) {
1080 ieee->stats.rx_crc_errors++;
1081 ieee->ieee_stats.rx_fcs_errors++;
1082 }
1083 else if (status->frame_status & ZD_RX_CRC16_ERROR)
1084 ieee->stats.rx_crc_errors++;
e85d0918
DD		 1085 return -EINVAL;
1086 }
22d3405f 1087
e85d0918
DD		 1088 memset(stats, 0, sizeof(struct ieee80211_rx_stats));
1089 stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
1090 + sizeof(struct rx_status));
1091 /* FIXME: 802.11a */
1092 stats->freq = IEEE80211_24GHZ_BAND;
1093 stats->received_channel = _zd_chip_get_channel(&mac->chip);
1094 stats->rssi = zd_rx_strength_percent(status->signal_strength);
1095 stats->signal = zd_rx_qual_percent(buffer,
1096 length - sizeof(struct rx_status),
1097 status);
1098 stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
1099 stats->rate = zd_rx_rate(buffer, status);
1100 if (stats->rate)
1101 stats->mask |= IEEE80211_STATMASK_RATE;
1102
e85d0918
DD		 1103 return 0;
1104}
1105
4d1feabc 1106static void zd_mac_rx(struct zd_mac *mac, struct sk_buff *skb)
e85d0918
DD		 1107{
1108 int r;
1109 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1110 struct ieee80211_rx_stats stats;
1111 const struct rx_status *status;
e85d0918 1112
4d1feabc
UK		 1113 if (skb->len < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
1114 IEEE80211_FCS_LEN + sizeof(struct rx_status))
1115 {
22d3405f
UK		 1116 ieee->stats.rx_errors++;
1117 ieee->stats.rx_length_errors++;
4d1feabc
UK		 1118 goto free_skb;
1119 }
e85d0918 1120
4d1feabc
UK		 1121 r = fill_rx_stats(&stats, &status, mac, skb->data, skb->len);
1122 if (r) {
22d3405f
UK		 1123 /* Only packets with rx errors are included here.
1124 * The error stats have already been set in fill_rx_stats.
1125 */
4d1feabc
UK		 1126 goto free_skb;
1127 }
e85d0918 1128
4d1feabc
UK		 1129 __skb_pull(skb, ZD_PLCP_HEADER_SIZE);
1130 __skb_trim(skb, skb->len -
1131 (IEEE80211_FCS_LEN + sizeof(struct rx_status)));
e85d0918 1132
4d1feabc
UK		 1133 update_qual_rssi(mac, skb->data, skb->len, stats.signal,
1134 status->signal_strength);
db888aed 1135
4d1feabc
UK		 1136 r = filter_rx(ieee, skb->data, skb->len, &stats);
1137 if (r <= 0) {
22d3405f
UK		 1138 if (r < 0) {
1139 ieee->stats.rx_errors++;
4d1feabc 1140 dev_dbg_f(zd_mac_dev(mac), "Error in packet.\n");
22d3405f 1141 }
4d1feabc
UK		 1142 goto free_skb;
1143 }
e85d0918 1144
e85d0918 1145 if (ieee->iw_mode == IW_MODE_MONITOR)
4d1feabc 1146 fill_rt_header(skb_push(skb, sizeof(struct zd_rt_hdr)), mac,
e85d0918 1147 &stats, status);
e85d0918
DD		 1148
1149 r = ieee80211_rx(ieee, skb, &stats);
4d1feabc
UK		 1150 if (r)
1151 return;
1152free_skb:
1153 /* We are always in a soft irq. */
1154 dev_kfree_skb(skb);
1155}
1156
1157static void do_rx(unsigned long mac_ptr)
1158{
1159 struct zd_mac *mac = (struct zd_mac *)mac_ptr;
1160 struct sk_buff *skb;
1161
1162 while ((skb = skb_dequeue(&mac->rx_queue)) != NULL)
1163 zd_mac_rx(mac, skb);
1164}
1165
1166int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length)
1167{
1168 struct sk_buff *skb;
1169
1170 skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
1171 if (!skb) {
22d3405f 1172 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
4d1feabc 1173 dev_warn(zd_mac_dev(mac), "Could not allocate skb.\n");
22d3405f 1174 ieee->stats.rx_dropped++;
4d1feabc
UK		 1175 return -ENOMEM;
1176 }
1177 skb_reserve(skb, sizeof(struct zd_rt_hdr));
1178 memcpy(__skb_put(skb, length), buffer, length);
1179 skb_queue_tail(&mac->rx_queue, skb);
1180 tasklet_schedule(&mac->rx_tasklet);
e85d0918
DD		 1181 return 0;
1182}
1183
1184static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
1185 int pri)
1186{
1187 return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
1188}
1189
1190static void set_security(struct net_device *netdev,
1191 struct ieee80211_security *sec)
1192{
1193 struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
1194 struct ieee80211_security *secinfo = &ieee->sec;
1195 int keyidx;
1196
1197 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
1198
1199 for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
1200 if (sec->flags & (1<<keyidx)) {
1201 secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
1202 secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
1203 memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
1204 SCM_KEY_LEN);
1205 }
1206
1207 if (sec->flags & SEC_ACTIVE_KEY) {
1208 secinfo->active_key = sec->active_key;
1209 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1210 " .active_key = %d\n", sec->active_key);
1211 }
1212 if (sec->flags & SEC_UNICAST_GROUP) {
1213 secinfo->unicast_uses_group = sec->unicast_uses_group;
1214 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1215 " .unicast_uses_group = %d\n",
1216 sec->unicast_uses_group);
1217 }
1218 if (sec->flags & SEC_LEVEL) {
1219 secinfo->level = sec->level;
1220 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1221 " .level = %d\n", sec->level);
1222 }
1223 if (sec->flags & SEC_ENABLED) {
1224 secinfo->enabled = sec->enabled;
1225 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1226 " .enabled = %d\n", sec->enabled);
1227 }
1228 if (sec->flags & SEC_ENCRYPT) {
1229 secinfo->encrypt = sec->encrypt;
1230 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1231 " .encrypt = %d\n", sec->encrypt);
1232 }
1233 if (sec->flags & SEC_AUTH_MODE) {
1234 secinfo->auth_mode = sec->auth_mode;
1235 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1236 " .auth_mode = %d\n", sec->auth_mode);
1237 }
1238}
1239
1240static void ieee_init(struct ieee80211_device *ieee)
1241{
1242 ieee->mode = IEEE_B | IEEE_G;
1243 ieee->freq_band = IEEE80211_24GHZ_BAND;
1244 ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
1245 ieee->tx_headroom = sizeof(struct zd_ctrlset);
1246 ieee->set_security = set_security;
1247 ieee->hard_start_xmit = netdev_tx;
1248
1249 /* Software encryption/decryption for now */
1250 ieee->host_build_iv = 0;
1251 ieee->host_encrypt = 1;
1252 ieee->host_decrypt = 1;
1253
1254 /* FIXME: default to managed mode, until ieee80211 and zd1211rw can
1255 * correctly support AUTO */
1256 ieee->iw_mode = IW_MODE_INFRA;
1257}
1258
1259static void softmac_init(struct ieee80211softmac_device *sm)
1260{
1261 sm->set_channel = set_channel;
b1382ede 1262 sm->bssinfo_change = bssinfo_change;
e85d0918
DD		 1263}
1264
1265struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
1266{
1267 struct zd_mac *mac = zd_netdev_mac(ndev);
1268 struct iw_statistics *iw_stats = &mac->iw_stats;
db888aed 1269 unsigned int i, count, qual_total, rssi_total;
e85d0918
DD		 1270
1271 memset(iw_stats, 0, sizeof(struct iw_statistics));
1272 /* We are not setting the status, because ieee->state is not updated
1273 * at all and this driver doesn't track authentication state.
1274 */
1275 spin_lock_irq(&mac->lock);
db888aed
UK		 1276 count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ?
1277 mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE;
1278 qual_total = rssi_total = 0;
1279 for (i = 0; i < count; i++) {
1280 qual_total += mac->qual_buffer[i];
1281 rssi_total += mac->rssi_buffer[i];
1282 }
e85d0918 1283 spin_unlock_irq(&mac->lock);
db888aed
UK		 1284 iw_stats->qual.updated = IW_QUAL_NOISE_INVALID;
1285 if (count > 0) {
1286 iw_stats->qual.qual = qual_total / count;
1287 iw_stats->qual.level = rssi_total / count;
1288 iw_stats->qual.updated |=
1289 IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED;
1290 } else {
1291 iw_stats->qual.updated |=
1292 IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID;
1293 }
e85d0918
DD		 1294 /* TODO: update counter */
1295 return iw_stats;
1296}
1297
583afd1e
UK		 1298#define LINK_LED_WORK_DELAY HZ
1299
c4028958 1300static void link_led_handler(struct work_struct *work)
583afd1e 1301{
c4028958
DH		 1302 struct zd_mac *mac =
1303 container_of(work, struct zd_mac, housekeeping.link_led_work.work);
583afd1e
UK		 1304 struct zd_chip *chip = &mac->chip;
1305 struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev);
1306 int is_associated;
1307 int r;
1308
1309 spin_lock_irq(&mac->lock);
41072a1b 1310 is_associated = sm->associnfo.associated != 0;
583afd1e
UK		 1311 spin_unlock_irq(&mac->lock);
1312
1313 r = zd_chip_control_leds(chip,
1314 is_associated ? LED_ASSOCIATED : LED_SCANNING);
1315 if (r)
1316 dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
1317
1318 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1319 LINK_LED_WORK_DELAY);
1320}
1321
1322static void housekeeping_init(struct zd_mac *mac)
1323{
c4028958 1324 INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
583afd1e
UK		 1325}
1326
1327static void housekeeping_enable(struct zd_mac *mac)
1328{
1329 dev_dbg_f(zd_mac_dev(mac), "\n");
1330 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1331 0);
1332}
1333
1334static void housekeeping_disable(struct zd_mac *mac)
1335{
1336 dev_dbg_f(zd_mac_dev(mac), "\n");
1337 cancel_rearming_delayed_workqueue(zd_workqueue,
1338 &mac->housekeeping.link_led_work);
1339 zd_chip_control_leds(&mac->chip, LED_OFF);
1340}
Linux kernel - Deliverables
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