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[PATCH] zd1211rw: Pass more management frame types up to host
[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);
35
36int zd_mac_init(struct zd_mac *mac,
37 struct net_device *netdev,
38 struct usb_interface *intf)
39{
40 struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
41
42 memset(mac, 0, sizeof(*mac));
43 spin_lock_init(&mac->lock);
44 mac->netdev = netdev;
45
46 ieee_init(ieee);
47 softmac_init(ieee80211_priv(netdev));
48 zd_chip_init(&mac->chip, netdev, intf);
49 return 0;
50}
51
52static int reset_channel(struct zd_mac *mac)
53{
54 int r;
55 unsigned long flags;
56 const struct channel_range *range;
57
58 spin_lock_irqsave(&mac->lock, flags);
59 range = zd_channel_range(mac->regdomain);
60 if (!range->start) {
61 r = -EINVAL;
62 goto out;
63 }
64 mac->requested_channel = range->start;
65 r = 0;
66out:
67 spin_unlock_irqrestore(&mac->lock, flags);
68 return r;
69}
70
71int zd_mac_init_hw(struct zd_mac *mac, u8 device_type)
72{
73 int r;
74 struct zd_chip *chip = &mac->chip;
75 u8 addr[ETH_ALEN];
76 u8 default_regdomain;
77
78 r = zd_chip_enable_int(chip);
79 if (r)
80 goto out;
81 r = zd_chip_init_hw(chip, device_type);
82 if (r)
83 goto disable_int;
84
85 zd_get_e2p_mac_addr(chip, addr);
86 r = zd_write_mac_addr(chip, addr);
87 if (r)
88 goto disable_int;
89 ZD_ASSERT(!irqs_disabled());
90 spin_lock_irq(&mac->lock);
91 memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
92 spin_unlock_irq(&mac->lock);
93
94 r = zd_read_regdomain(chip, &default_regdomain);
95 if (r)
96 goto disable_int;
97 if (!zd_regdomain_supported(default_regdomain)) {
98 dev_dbg_f(zd_mac_dev(mac),
99 "Regulatory Domain %#04x is not supported.\n",
100 default_regdomain);
101 r = -EINVAL;
102 goto disable_int;
103 }
104 spin_lock_irq(&mac->lock);
105 mac->regdomain = mac->default_regdomain = default_regdomain;
106 spin_unlock_irq(&mac->lock);
107 r = reset_channel(mac);
108 if (r)
109 goto disable_int;
110
111 r = zd_set_encryption_type(chip, NO_WEP);
112 if (r)
113 goto disable_int;
114
115 r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
116 if (r)
117 goto disable_int;
118
119 r = 0;
120disable_int:
121 zd_chip_disable_int(chip);
122out:
123 return r;
124}
125
126void zd_mac_clear(struct zd_mac *mac)
127{
128 /* Aquire the lock. */
129 spin_lock(&mac->lock);
130 spin_unlock(&mac->lock);
131 zd_chip_clear(&mac->chip);
132 memset(mac, 0, sizeof(*mac));
133}
134
135static int reset_mode(struct zd_mac *mac)
136{
137 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
138 struct zd_ioreq32 ioreqs[3] = {
71eae25e
DD		 139 { CR_RX_FILTER, RX_FILTER_BEACON | RX_FILTER_PROBE_RESPONSE |
140 RX_FILTER_AUTH | RX_FILTER_ASSOC_RESPONSE |
141 RX_FILTER_REASSOC_RESPONSE |
142 RX_FILTER_DISASSOC },
e85d0918
DD		 143 { CR_SNIFFER_ON, 0U },
144 { CR_ENCRYPTION_TYPE, NO_WEP },
145 };
146
147 if (ieee->iw_mode == IW_MODE_MONITOR) {
148 ioreqs[0].value = 0xffffffff;
149 ioreqs[1].value = 0x1;
150 ioreqs[2].value = ENC_SNIFFER;
151 }
152
153 return zd_iowrite32a(&mac->chip, ioreqs, 3);
154}
155
156int zd_mac_open(struct net_device *netdev)
157{
158 struct zd_mac *mac = zd_netdev_mac(netdev);
159 struct zd_chip *chip = &mac->chip;
160 int r;
161
162 r = zd_chip_enable_int(chip);
163 if (r < 0)
164 goto out;
165
166 r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
167 if (r < 0)
168 goto disable_int;
169 r = reset_mode(mac);
170 if (r)
171 goto disable_int;
172 r = zd_chip_switch_radio_on(chip);
173 if (r < 0)
174 goto disable_int;
175 r = zd_chip_set_channel(chip, mac->requested_channel);
176 if (r < 0)
177 goto disable_radio;
178 r = zd_chip_enable_rx(chip);
179 if (r < 0)
180 goto disable_radio;
181 r = zd_chip_enable_hwint(chip);
182 if (r < 0)
183 goto disable_rx;
184
185 ieee80211softmac_start(netdev);
186 return 0;
187disable_rx:
188 zd_chip_disable_rx(chip);
189disable_radio:
190 zd_chip_switch_radio_off(chip);
191disable_int:
192 zd_chip_disable_int(chip);
193out:
194 return r;
195}
196
197int zd_mac_stop(struct net_device *netdev)
198{
199 struct zd_mac *mac = zd_netdev_mac(netdev);
200 struct zd_chip *chip = &mac->chip;
201
c9a4b35d
DD		 202 netif_stop_queue(netdev);
203
e85d0918
DD		 204 /*
205 * The order here deliberately is a little different from the open()
206 * method, since we need to make sure there is no opportunity for RX
207 * frames to be processed by softmac after we have stopped it.
208 */
209
210 zd_chip_disable_rx(chip);
211 ieee80211softmac_stop(netdev);
212
213 zd_chip_disable_hwint(chip);
214 zd_chip_switch_radio_off(chip);
215 zd_chip_disable_int(chip);
216
217 return 0;
218}
219
220int zd_mac_set_mac_address(struct net_device *netdev, void *p)
221{
222 int r;
223 unsigned long flags;
224 struct sockaddr *addr = p;
225 struct zd_mac *mac = zd_netdev_mac(netdev);
226 struct zd_chip *chip = &mac->chip;
227
228 if (!is_valid_ether_addr(addr->sa_data))
229 return -EADDRNOTAVAIL;
230
231 dev_dbg_f(zd_mac_dev(mac),
232 "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data));
233
234 r = zd_write_mac_addr(chip, addr->sa_data);
235 if (r)
236 return r;
237
238 spin_lock_irqsave(&mac->lock, flags);
239 memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
240 spin_unlock_irqrestore(&mac->lock, flags);
241
242 return 0;
243}
244
245int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
246{
247 int r;
248 u8 channel;
249
250 ZD_ASSERT(!irqs_disabled());
251 spin_lock_irq(&mac->lock);
252 if (regdomain == 0) {
253 regdomain = mac->default_regdomain;
254 }
255 if (!zd_regdomain_supported(regdomain)) {
256 spin_unlock_irq(&mac->lock);
257 return -EINVAL;
258 }
259 mac->regdomain = regdomain;
260 channel = mac->requested_channel;
261 spin_unlock_irq(&mac->lock);
262
263 r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
264 if (r)
265 return r;
266 if (!zd_regdomain_supports_channel(regdomain, channel)) {
267 r = reset_channel(mac);
268 if (r)
269 return r;
270 }
271
272 return 0;
273}
274
275u8 zd_mac_get_regdomain(struct zd_mac *mac)
276{
277 unsigned long flags;
278 u8 regdomain;
279
280 spin_lock_irqsave(&mac->lock, flags);
281 regdomain = mac->regdomain;
282 spin_unlock_irqrestore(&mac->lock, flags);
283 return regdomain;
284}
285
286static void set_channel(struct net_device *netdev, u8 channel)
287{
288 struct zd_mac *mac = zd_netdev_mac(netdev);
289
290 dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
291
292 zd_chip_set_channel(&mac->chip, channel);
293}
294
295/* TODO: Should not work in Managed mode. */
296int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
297{
298 unsigned long lock_flags;
299 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
300
301 if (ieee->iw_mode == IW_MODE_INFRA)
302 return -EPERM;
303
304 spin_lock_irqsave(&mac->lock, lock_flags);
305 if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
306 spin_unlock_irqrestore(&mac->lock, lock_flags);
307 return -EINVAL;
308 }
309 mac->requested_channel = channel;
310 spin_unlock_irqrestore(&mac->lock, lock_flags);
311 if (netif_running(mac->netdev))
312 return zd_chip_set_channel(&mac->chip, channel);
313 else
314 return 0;
315}
316
317int zd_mac_get_channel(struct zd_mac *mac, u8 *channel, u8 *flags)
318{
319 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
320
321 *channel = zd_chip_get_channel(&mac->chip);
322 if (ieee->iw_mode != IW_MODE_INFRA) {
323 spin_lock_irq(&mac->lock);
324 *flags = *channel == mac->requested_channel ?
325 MAC_FIXED_CHANNEL : 0;
326 spin_unlock(&mac->lock);
327 } else {
328 *flags = 0;
329 }
330 dev_dbg_f(zd_mac_dev(mac), "channel %u flags %u\n", *channel, *flags);
331 return 0;
332}
333
334/* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
335static u8 cs_typed_rate(u8 cs_rate)
336{
337 static const u8 typed_rates[16] = {
338 [ZD_CS_CCK_RATE_1M] = ZD_CS_CCK|ZD_CS_CCK_RATE_1M,
339 [ZD_CS_CCK_RATE_2M] = ZD_CS_CCK|ZD_CS_CCK_RATE_2M,
340 [ZD_CS_CCK_RATE_5_5M] = ZD_CS_CCK|ZD_CS_CCK_RATE_5_5M,
341 [ZD_CS_CCK_RATE_11M] = ZD_CS_CCK|ZD_CS_CCK_RATE_11M,
342 [ZD_OFDM_RATE_6M] = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
343 [ZD_OFDM_RATE_9M] = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
344 [ZD_OFDM_RATE_12M] = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
345 [ZD_OFDM_RATE_18M] = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
346 [ZD_OFDM_RATE_24M] = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
347 [ZD_OFDM_RATE_36M] = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
348 [ZD_OFDM_RATE_48M] = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
349 [ZD_OFDM_RATE_54M] = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
350 };
351
352 ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
353 return typed_rates[cs_rate & ZD_CS_RATE_MASK];
354}
355
356/* Fallback to lowest rate, if rate is unknown. */
357static u8 rate_to_cs_rate(u8 rate)
358{
359 switch (rate) {
360 case IEEE80211_CCK_RATE_2MB:
361 return ZD_CS_CCK_RATE_2M;
362 case IEEE80211_CCK_RATE_5MB:
363 return ZD_CS_CCK_RATE_5_5M;
364 case IEEE80211_CCK_RATE_11MB:
365 return ZD_CS_CCK_RATE_11M;
366 case IEEE80211_OFDM_RATE_6MB:
367 return ZD_OFDM_RATE_6M;
368 case IEEE80211_OFDM_RATE_9MB:
369 return ZD_OFDM_RATE_9M;
370 case IEEE80211_OFDM_RATE_12MB:
371 return ZD_OFDM_RATE_12M;
372 case IEEE80211_OFDM_RATE_18MB:
373 return ZD_OFDM_RATE_18M;
374 case IEEE80211_OFDM_RATE_24MB:
375 return ZD_OFDM_RATE_24M;
376 case IEEE80211_OFDM_RATE_36MB:
377 return ZD_OFDM_RATE_36M;
378 case IEEE80211_OFDM_RATE_48MB:
379 return ZD_OFDM_RATE_48M;
380 case IEEE80211_OFDM_RATE_54MB:
381 return ZD_OFDM_RATE_54M;
382 }
383 return ZD_CS_CCK_RATE_1M;
384}
385
386int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
387{
388 struct ieee80211_device *ieee;
389
390 switch (mode) {
391 case IW_MODE_AUTO:
392 case IW_MODE_ADHOC:
393 case IW_MODE_INFRA:
394 mac->netdev->type = ARPHRD_ETHER;
395 break;
396 case IW_MODE_MONITOR:
397 mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
398 break;
399 default:
400 dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
401 return -EINVAL;
402 }
403
404 ieee = zd_mac_to_ieee80211(mac);
405 ZD_ASSERT(!irqs_disabled());
406 spin_lock_irq(&ieee->lock);
407 ieee->iw_mode = mode;
408 spin_unlock_irq(&ieee->lock);
409
410 if (netif_running(mac->netdev))
411 return reset_mode(mac);
412
413 return 0;
414}
415
416int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
417{
418 unsigned long flags;
419 struct ieee80211_device *ieee;
420
421 ieee = zd_mac_to_ieee80211(mac);
422 spin_lock_irqsave(&ieee->lock, flags);
423 *mode = ieee->iw_mode;
424 spin_unlock_irqrestore(&ieee->lock, flags);
425 return 0;
426}
427
428int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
429{
430 int i;
431 const struct channel_range *channel_range;
432 u8 regdomain;
433
434 memset(range, 0, sizeof(*range));
435
436 /* FIXME: Not so important and depends on the mode. For 802.11g
437 * usually this value is used. It seems to be that Bit/s number is
438 * given here.
439 */
440 range->throughput = 27 * 1000 * 1000;
441
442 range->max_qual.qual = 100;
443 range->max_qual.level = 100;
444
445 /* FIXME: Needs still to be tuned. */
446 range->avg_qual.qual = 71;
447 range->avg_qual.level = 80;
448
449 /* FIXME: depends on standard? */
450 range->min_rts = 256;
451 range->max_rts = 2346;
452
453 range->min_frag = MIN_FRAG_THRESHOLD;
454 range->max_frag = MAX_FRAG_THRESHOLD;
455
456 range->max_encoding_tokens = WEP_KEYS;
457 range->num_encoding_sizes = 2;
458 range->encoding_size[0] = 5;
459 range->encoding_size[1] = WEP_KEY_LEN;
460
461 range->we_version_compiled = WIRELESS_EXT;
462 range->we_version_source = 20;
463
464 ZD_ASSERT(!irqs_disabled());
465 spin_lock_irq(&mac->lock);
466 regdomain = mac->regdomain;
467 spin_unlock_irq(&mac->lock);
468 channel_range = zd_channel_range(regdomain);
469
470 range->num_channels = channel_range->end - channel_range->start;
471 range->old_num_channels = range->num_channels;
472 range->num_frequency = range->num_channels;
473 range->old_num_frequency = range->num_frequency;
474
475 for (i = 0; i < range->num_frequency; i++) {
476 struct iw_freq *freq = &range->freq[i];
477 freq->i = channel_range->start + i;
478 zd_channel_to_freq(freq, freq->i);
479 }
480
481 return 0;
482}
483
484static int zd_calc_tx_length_us(u8 *service, u8 cs_rate, u16 tx_length)
485{
486 static const u8 rate_divisor[] = {
487 [ZD_CS_CCK_RATE_1M] = 1,
488 [ZD_CS_CCK_RATE_2M] = 2,
489 [ZD_CS_CCK_RATE_5_5M] = 11, /* bits must be doubled */
490 [ZD_CS_CCK_RATE_11M] = 11,
491 [ZD_OFDM_RATE_6M] = 6,
492 [ZD_OFDM_RATE_9M] = 9,
493 [ZD_OFDM_RATE_12M] = 12,
494 [ZD_OFDM_RATE_18M] = 18,
495 [ZD_OFDM_RATE_24M] = 24,
496 [ZD_OFDM_RATE_36M] = 36,
497 [ZD_OFDM_RATE_48M] = 48,
498 [ZD_OFDM_RATE_54M] = 54,
499 };
500
501 u32 bits = (u32)tx_length * 8;
502 u32 divisor;
503
504 divisor = rate_divisor[cs_rate];
505 if (divisor == 0)
506 return -EINVAL;
507
508 switch (cs_rate) {
509 case ZD_CS_CCK_RATE_5_5M:
510 bits = (2*bits) + 10; /* round up to the next integer */
511 break;
512 case ZD_CS_CCK_RATE_11M:
513 if (service) {
514 u32 t = bits % 11;
515 *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
516 if (0 < t && t <= 3) {
517 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
518 }
519 }
520 bits += 10; /* round up to the next integer */
521 break;
522 }
523
524 return bits/divisor;
525}
526
527enum {
528 R2M_SHORT_PREAMBLE = 0x01,
529 R2M_11A = 0x02,
530};
531
532static u8 cs_rate_to_modulation(u8 cs_rate, int flags)
533{
534 u8 modulation;
535
536 modulation = cs_typed_rate(cs_rate);
537 if (flags & R2M_SHORT_PREAMBLE) {
538 switch (ZD_CS_RATE(modulation)) {
539 case ZD_CS_CCK_RATE_2M:
540 case ZD_CS_CCK_RATE_5_5M:
541 case ZD_CS_CCK_RATE_11M:
542 modulation |= ZD_CS_CCK_PREA_SHORT;
543 return modulation;
544 }
545 }
546 if (flags & R2M_11A) {
547 if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM)
548 modulation |= ZD_CS_OFDM_MODE_11A;
549 }
550 return modulation;
551}
552
553static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
554 struct ieee80211_hdr_4addr *hdr)
555{
556 struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
557 u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
558 u8 rate, cs_rate;
559 int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
560
561 /* FIXME: 802.11a? short preamble? */
562 rate = ieee80211softmac_suggest_txrate(softmac,
563 is_multicast_ether_addr(hdr->addr1), is_mgt);
564
565 cs_rate = rate_to_cs_rate(rate);
566 cs->modulation = cs_rate_to_modulation(cs_rate, 0);
567}
568
569static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
570 struct ieee80211_hdr_4addr *header)
571{
572 unsigned int tx_length = le16_to_cpu(cs->tx_length);
573 u16 fctl = le16_to_cpu(header->frame_ctl);
574 u16 ftype = WLAN_FC_GET_TYPE(fctl);
575 u16 stype = WLAN_FC_GET_STYPE(fctl);
576
577 /*
578 * CONTROL:
579 * - start at 0x00
580 * - if fragment 0, enable bit 0
581 * - if backoff needed, enable bit 0
582 * - if burst (backoff not needed) disable bit 0
583 * - if multicast, enable bit 1
584 * - if PS-POLL frame, enable bit 2
585 * - if in INDEPENDENT_BSS mode and zd1205_DestPowerSave, then enable
586 * bit 4 (FIXME: wtf)
587 * - if frag_len > RTS threshold, set bit 5 as long if it isnt
588 * multicast or mgt
589 * - if bit 5 is set, and we are in OFDM mode, unset bit 5 and set bit
590 * 7
591 */
592
593 cs->control = 0;
594
595 /* First fragment */
596 if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0)
597 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
598
599 /* Multicast */
600 if (is_multicast_ether_addr(header->addr1))
601 cs->control |= ZD_CS_MULTICAST;
602
603 /* PS-POLL */
604 if (stype == IEEE80211_STYPE_PSPOLL)
605 cs->control |= ZD_CS_PS_POLL_FRAME;
606
607 if (!is_multicast_ether_addr(header->addr1) &&
608 ftype != IEEE80211_FTYPE_MGMT &&
609 tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
610 {
611 /* FIXME: check the logic */
612 if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM) {
613 /* 802.11g */
614 cs->control |= ZD_CS_SELF_CTS;
615 } else { /* 802.11b */
616 cs->control |= ZD_CS_RTS;
617 }
618 }
619
620 /* FIXME: Management frame? */
621}
622
623static int fill_ctrlset(struct zd_mac *mac,
624 struct ieee80211_txb *txb,
625 int frag_num)
626{
627 int r;
628 struct sk_buff *skb = txb->fragments[frag_num];
629 struct ieee80211_hdr_4addr *hdr =
630 (struct ieee80211_hdr_4addr *) skb->data;
631 unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
632 unsigned int next_frag_len;
633 unsigned int packet_length;
634 struct zd_ctrlset *cs = (struct zd_ctrlset *)
635 skb_push(skb, sizeof(struct zd_ctrlset));
636
637 if (frag_num+1 < txb->nr_frags) {
638 next_frag_len = txb->fragments[frag_num+1]->len +
639 IEEE80211_FCS_LEN;
640 } else {
641 next_frag_len = 0;
642 }
643 ZD_ASSERT(frag_len <= 0xffff);
644 ZD_ASSERT(next_frag_len <= 0xffff);
645
646 cs_set_modulation(mac, cs, hdr);
647
648 cs->tx_length = cpu_to_le16(frag_len);
649
650 cs_set_control(mac, cs, hdr);
651
652 packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
653 ZD_ASSERT(packet_length <= 0xffff);
654 /* ZD1211B: Computing the length difference this way, gives us
655 * flexibility to compute the packet length.
656 */
657 cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ?
658 packet_length - frag_len : packet_length);
659
660 /*
661 * CURRENT LENGTH:
662 * - transmit frame length in microseconds
663 * - seems to be derived from frame length
664 * - see Cal_Us_Service() in zdinlinef.h
665 * - if macp->bTxBurstEnable is enabled, then multiply by 4
666 * - bTxBurstEnable is never set in the vendor driver
667 *
668 * SERVICE:
669 * - "for PLCP configuration"
670 * - always 0 except in some situations at 802.11b 11M
671 * - see line 53 of zdinlinef.h
672 */
673 cs->service = 0;
674 r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
675 le16_to_cpu(cs->tx_length));
676 if (r < 0)
677 return r;
678 cs->current_length = cpu_to_le16(r);
679
680 if (next_frag_len == 0) {
681 cs->next_frame_length = 0;
682 } else {
683 r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
684 next_frag_len);
685 if (r < 0)
686 return r;
687 cs->next_frame_length = cpu_to_le16(r);
688 }
689
690 return 0;
691}
692
693static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
694{
695 int i, r;
696
697 for (i = 0; i < txb->nr_frags; i++) {
698 struct sk_buff *skb = txb->fragments[i];
699
700 r = fill_ctrlset(mac, txb, i);
701 if (r)
702 return r;
703 r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
704 if (r)
705 return r;
706 }
707
708 /* FIXME: shouldn't this be handled by the upper layers? */
709 mac->netdev->trans_start = jiffies;
710
711 ieee80211_txb_free(txb);
712 return 0;
713}
714
715struct zd_rt_hdr {
716 struct ieee80211_radiotap_header rt_hdr;
717 u8 rt_flags;
99f65f25 718 u8 rt_rate;
e85d0918
DD		 719 u16 rt_channel;
720 u16 rt_chbitmask;
99f65f25 721} __attribute__((packed));
e85d0918
DD		 722
723static void fill_rt_header(void *buffer, struct zd_mac *mac,
724 const struct ieee80211_rx_stats *stats,
725 const struct rx_status *status)
726{
727 struct zd_rt_hdr *hdr = buffer;
728
729 hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
730 hdr->rt_hdr.it_pad = 0;
731 hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
732 hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
733 (1 << IEEE80211_RADIOTAP_CHANNEL) |
734 (1 << IEEE80211_RADIOTAP_RATE));
735
736 hdr->rt_flags = 0;
737 if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
738 hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
739
99f65f25
UK		 740 hdr->rt_rate = stats->rate / 5;
741
e85d0918
DD		 742 /* FIXME: 802.11a */
743 hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
744 _zd_chip_get_channel(&mac->chip)));
745 hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
746 ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
747 ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
e85d0918
DD		 748}
749
750/* Returns 1 if the data packet is for us and 0 otherwise. */
751static int is_data_packet_for_us(struct ieee80211_device *ieee,
752 struct ieee80211_hdr_4addr *hdr)
753{
754 struct net_device *netdev = ieee->dev;
755 u16 fc = le16_to_cpu(hdr->frame_ctl);
756
757 ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
758
759 switch (ieee->iw_mode) {
760 case IW_MODE_ADHOC:
761 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
762 memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) != 0)
763 return 0;
764 break;
765 case IW_MODE_AUTO:
766 case IW_MODE_INFRA:
767 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
768 IEEE80211_FCTL_FROMDS ||
769 memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) != 0)
770 return 0;
771 break;
772 default:
773 ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
774 return 0;
775 }
776
777 return memcmp(hdr->addr1, netdev->dev_addr, ETH_ALEN) == 0 ||
778 is_multicast_ether_addr(hdr->addr1) ||
779 (netdev->flags & IFF_PROMISC);
780}
781
782/* Filters receiving packets. If it returns 1 send it to ieee80211_rx, if 0
783 * return. If an error is detected -EINVAL is returned. ieee80211_rx_mgt() is
784 * called here.
785 *
786 * It has been based on ieee80211_rx_any.
787 */
788static int filter_rx(struct ieee80211_device *ieee,
789 const u8 *buffer, unsigned int length,
790 struct ieee80211_rx_stats *stats)
791{
792 struct ieee80211_hdr_4addr *hdr;
793 u16 fc;
794
795 if (ieee->iw_mode == IW_MODE_MONITOR)
796 return 1;
797
798 hdr = (struct ieee80211_hdr_4addr *)buffer;
799 fc = le16_to_cpu(hdr->frame_ctl);
800 if ((fc & IEEE80211_FCTL_VERS) != 0)
801 return -EINVAL;
802
803 switch (WLAN_FC_GET_TYPE(fc)) {
804 case IEEE80211_FTYPE_MGMT:
805 if (length < sizeof(struct ieee80211_hdr_3addr))
806 return -EINVAL;
807 ieee80211_rx_mgt(ieee, hdr, stats);
808 return 0;
809 case IEEE80211_FTYPE_CTL:
810 /* Ignore invalid short buffers */
811 return 0;
812 case IEEE80211_FTYPE_DATA:
813 if (length < sizeof(struct ieee80211_hdr_3addr))
814 return -EINVAL;
815 return is_data_packet_for_us(ieee, hdr);
816 }
817
818 return -EINVAL;
819}
820
821static void update_qual_rssi(struct zd_mac *mac, u8 qual_percent, u8 rssi)
822{
823 unsigned long flags;
824
825 spin_lock_irqsave(&mac->lock, flags);
826 mac->qual_average = (7 * mac->qual_average + qual_percent) / 8;
827 mac->rssi_average = (7 * mac->rssi_average + rssi) / 8;
828 spin_unlock_irqrestore(&mac->lock, flags);
829}
830
831static int fill_rx_stats(struct ieee80211_rx_stats *stats,
832 const struct rx_status **pstatus,
833 struct zd_mac *mac,
834 const u8 *buffer, unsigned int length)
835{
836 const struct rx_status *status;
837
838 *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status));
839 if (status->frame_status & ZD_RX_ERROR) {
840 /* FIXME: update? */
841 return -EINVAL;
842 }
843 memset(stats, 0, sizeof(struct ieee80211_rx_stats));
844 stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
845 + sizeof(struct rx_status));
846 /* FIXME: 802.11a */
847 stats->freq = IEEE80211_24GHZ_BAND;
848 stats->received_channel = _zd_chip_get_channel(&mac->chip);
849 stats->rssi = zd_rx_strength_percent(status->signal_strength);
850 stats->signal = zd_rx_qual_percent(buffer,
851 length - sizeof(struct rx_status),
852 status);
853 stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
854 stats->rate = zd_rx_rate(buffer, status);
855 if (stats->rate)
856 stats->mask |= IEEE80211_STATMASK_RATE;
857
858 update_qual_rssi(mac, stats->signal, stats->rssi);
859 return 0;
860}
861
862int zd_mac_rx(struct zd_mac *mac, const u8 *buffer, unsigned int length)
863{
864 int r;
865 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
866 struct ieee80211_rx_stats stats;
867 const struct rx_status *status;
868 struct sk_buff *skb;
869
870 if (length < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
871 IEEE80211_FCS_LEN + sizeof(struct rx_status))
872 return -EINVAL;
873
874 r = fill_rx_stats(&stats, &status, mac, buffer, length);
875 if (r)
876 return r;
877
878 length -= ZD_PLCP_HEADER_SIZE+IEEE80211_FCS_LEN+
879 sizeof(struct rx_status);
880 buffer += ZD_PLCP_HEADER_SIZE;
881
882 r = filter_rx(ieee, buffer, length, &stats);
883 if (r <= 0)
884 return r;
885
886 skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
887 if (!skb)
888 return -ENOMEM;
889 if (ieee->iw_mode == IW_MODE_MONITOR)
890 fill_rt_header(skb_put(skb, sizeof(struct zd_rt_hdr)), mac,
891 &stats, status);
892 memcpy(skb_put(skb, length), buffer, length);
893
894 r = ieee80211_rx(ieee, skb, &stats);
895 if (!r) {
896 ZD_ASSERT(in_irq());
897 dev_kfree_skb_irq(skb);
898 }
899 return 0;
900}
901
902static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
903 int pri)
904{
905 return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
906}
907
908static void set_security(struct net_device *netdev,
909 struct ieee80211_security *sec)
910{
911 struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
912 struct ieee80211_security *secinfo = &ieee->sec;
913 int keyidx;
914
915 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
916
917 for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
918 if (sec->flags & (1<<keyidx)) {
919 secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
920 secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
921 memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
922 SCM_KEY_LEN);
923 }
924
925 if (sec->flags & SEC_ACTIVE_KEY) {
926 secinfo->active_key = sec->active_key;
927 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
928 " .active_key = %d\n", sec->active_key);
929 }
930 if (sec->flags & SEC_UNICAST_GROUP) {
931 secinfo->unicast_uses_group = sec->unicast_uses_group;
932 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
933 " .unicast_uses_group = %d\n",
934 sec->unicast_uses_group);
935 }
936 if (sec->flags & SEC_LEVEL) {
937 secinfo->level = sec->level;
938 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
939 " .level = %d\n", sec->level);
940 }
941 if (sec->flags & SEC_ENABLED) {
942 secinfo->enabled = sec->enabled;
943 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
944 " .enabled = %d\n", sec->enabled);
945 }
946 if (sec->flags & SEC_ENCRYPT) {
947 secinfo->encrypt = sec->encrypt;
948 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
949 " .encrypt = %d\n", sec->encrypt);
950 }
951 if (sec->flags & SEC_AUTH_MODE) {
952 secinfo->auth_mode = sec->auth_mode;
953 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
954 " .auth_mode = %d\n", sec->auth_mode);
955 }
956}
957
958static void ieee_init(struct ieee80211_device *ieee)
959{
960 ieee->mode = IEEE_B | IEEE_G;
961 ieee->freq_band = IEEE80211_24GHZ_BAND;
962 ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
963 ieee->tx_headroom = sizeof(struct zd_ctrlset);
964 ieee->set_security = set_security;
965 ieee->hard_start_xmit = netdev_tx;
966
967 /* Software encryption/decryption for now */
968 ieee->host_build_iv = 0;
969 ieee->host_encrypt = 1;
970 ieee->host_decrypt = 1;
971
972 /* FIXME: default to managed mode, until ieee80211 and zd1211rw can
973 * correctly support AUTO */
974 ieee->iw_mode = IW_MODE_INFRA;
975}
976
977static void softmac_init(struct ieee80211softmac_device *sm)
978{
979 sm->set_channel = set_channel;
980}
981
982struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
983{
984 struct zd_mac *mac = zd_netdev_mac(ndev);
985 struct iw_statistics *iw_stats = &mac->iw_stats;
986
987 memset(iw_stats, 0, sizeof(struct iw_statistics));
988 /* We are not setting the status, because ieee->state is not updated
989 * at all and this driver doesn't track authentication state.
990 */
991 spin_lock_irq(&mac->lock);
992 iw_stats->qual.qual = mac->qual_average;
993 iw_stats->qual.level = mac->rssi_average;
994 iw_stats->qual.updated = IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED|
995 IW_QUAL_NOISE_INVALID;
996 spin_unlock_irq(&mac->lock);
997 /* TODO: update counter */
998 return iw_stats;
999}
1000
1001#ifdef DEBUG
1002static const char* decryption_types[] = {
1003 [ZD_RX_NO_WEP] = "none",
1004 [ZD_RX_WEP64] = "WEP64",
1005 [ZD_RX_TKIP] = "TKIP",
1006 [ZD_RX_AES] = "AES",
1007 [ZD_RX_WEP128] = "WEP128",
1008 [ZD_RX_WEP256] = "WEP256",
1009};
1010
1011static const char *decryption_type_string(u8 type)
1012{
1013 const char *s;
1014
1015 if (type < ARRAY_SIZE(decryption_types)) {
1016 s = decryption_types[type];
1017 } else {
1018 s = NULL;
1019 }
1020 return s ? s : "unknown";
1021}
1022
1023static int is_ofdm(u8 frame_status)
1024{
1025 return (frame_status & ZD_RX_OFDM);
1026}
1027
1028void zd_dump_rx_status(const struct rx_status *status)
1029{
1030 const char* modulation;
1031 u8 quality;
1032
1033 if (is_ofdm(status->frame_status)) {
1034 modulation = "ofdm";
1035 quality = status->signal_quality_ofdm;
1036 } else {
1037 modulation = "cck";
1038 quality = status->signal_quality_cck;
1039 }
1040 pr_debug("rx status %s strength %#04x qual %#04x decryption %s\n",
1041 modulation, status->signal_strength, quality,
1042 decryption_type_string(status->decryption_type));
1043 if (status->frame_status & ZD_RX_ERROR) {
1044 pr_debug("rx error %s%s%s%s%s%s\n",
1045 (status->frame_status & ZD_RX_TIMEOUT_ERROR) ?
1046 "timeout " : "",
1047 (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR) ?
1048 "fifo " : "",
1049 (status->frame_status & ZD_RX_DECRYPTION_ERROR) ?
1050 "decryption " : "",
1051 (status->frame_status & ZD_RX_CRC32_ERROR) ?
1052 "crc32 " : "",
1053 (status->frame_status & ZD_RX_NO_ADDR1_MATCH_ERROR) ?
1054 "addr1 " : "",
1055 (status->frame_status & ZD_RX_CRC16_ERROR) ?
1056 "crc16" : "");
1057 }
1058}
1059#endif /* DEBUG */
Linux kernel - Deliverables
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