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.
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.
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
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>
28 #include "zd_ieee80211.h"
29 #include "zd_netdev.h"
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);
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);
42 int zd_mac_init(struct zd_mac *mac,
43 struct net_device *netdev,
44 struct usb_interface *intf)
46 struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
48 memset(mac, 0, sizeof(*mac));
49 spin_lock_init(&mac->lock);
51 INIT_DELAYED_WORK(&mac->set_rts_cts_work, set_rts_cts_work);
52 INIT_DELAYED_WORK(&mac->set_basic_rates_work, set_basic_rates_work);
55 softmac_init(ieee80211_priv(netdev));
56 zd_chip_init(&mac->chip, netdev, intf);
57 housekeeping_init(mac);
61 static int reset_channel(struct zd_mac *mac)
65 const struct channel_range *range;
67 spin_lock_irqsave(&mac->lock, flags);
68 range = zd_channel_range(mac->regdomain);
73 mac->requested_channel = range->start;
76 spin_unlock_irqrestore(&mac->lock, flags);
80 int zd_mac_init_hw(struct zd_mac *mac, u8 device_type)
83 struct zd_chip *chip = &mac->chip;
87 r = zd_chip_enable_int(chip);
90 r = zd_chip_init_hw(chip, device_type);
94 zd_get_e2p_mac_addr(chip, addr);
95 r = zd_write_mac_addr(chip, addr);
98 ZD_ASSERT(!irqs_disabled());
99 spin_lock_irq(&mac->lock);
100 memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
101 spin_unlock_irq(&mac->lock);
103 r = zd_read_regdomain(chip, &default_regdomain);
106 if (!zd_regdomain_supported(default_regdomain)) {
107 dev_dbg_f(zd_mac_dev(mac),
108 "Regulatory Domain %#04x is not supported.\n",
113 spin_lock_irq(&mac->lock);
114 mac->regdomain = mac->default_regdomain = default_regdomain;
115 spin_unlock_irq(&mac->lock);
116 r = reset_channel(mac);
120 /* We must inform the device that we are doing encryption/decryption in
121 * software at the moment. */
122 r = zd_set_encryption_type(chip, ENC_SNIFFER);
126 r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
132 zd_chip_disable_int(chip);
137 void zd_mac_clear(struct zd_mac *mac)
139 zd_chip_clear(&mac->chip);
140 ZD_ASSERT(!spin_is_locked(&mac->lock));
141 ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
144 static int reset_mode(struct zd_mac *mac)
146 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
147 struct zd_ioreq32 ioreqs[3] = {
148 { CR_RX_FILTER, STA_RX_FILTER },
149 { CR_SNIFFER_ON, 0U },
152 if (ieee->iw_mode == IW_MODE_MONITOR) {
153 ioreqs[0].value = 0xffffffff;
154 ioreqs[1].value = 0x1;
155 ioreqs[2].value = ENC_SNIFFER;
158 return zd_iowrite32a(&mac->chip, ioreqs, 3);
161 int zd_mac_open(struct net_device *netdev)
163 struct zd_mac *mac = zd_netdev_mac(netdev);
164 struct zd_chip *chip = &mac->chip;
167 r = zd_chip_enable_int(chip);
171 r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
177 r = zd_chip_switch_radio_on(chip);
180 r = zd_chip_set_channel(chip, mac->requested_channel);
183 r = zd_chip_enable_rx(chip);
186 r = zd_chip_enable_hwint(chip);
190 housekeeping_enable(mac);
191 ieee80211softmac_start(netdev);
194 zd_chip_disable_rx(chip);
196 zd_chip_switch_radio_off(chip);
198 zd_chip_disable_int(chip);
203 int zd_mac_stop(struct net_device *netdev)
205 struct zd_mac *mac = zd_netdev_mac(netdev);
206 struct zd_chip *chip = &mac->chip;
208 netif_stop_queue(netdev);
211 * The order here deliberately is a little different from the open()
212 * method, since we need to make sure there is no opportunity for RX
213 * frames to be processed by softmac after we have stopped it.
216 zd_chip_disable_rx(chip);
217 housekeeping_disable(mac);
218 ieee80211softmac_stop(netdev);
220 /* Ensure no work items are running or queued from this point */
221 cancel_delayed_work(&mac->set_rts_cts_work);
222 cancel_delayed_work(&mac->set_basic_rates_work);
223 flush_workqueue(zd_workqueue);
224 mac->updating_rts_rate = 0;
225 mac->updating_basic_rates = 0;
227 zd_chip_disable_hwint(chip);
228 zd_chip_switch_radio_off(chip);
229 zd_chip_disable_int(chip);
234 int zd_mac_set_mac_address(struct net_device *netdev, void *p)
238 struct sockaddr *addr = p;
239 struct zd_mac *mac = zd_netdev_mac(netdev);
240 struct zd_chip *chip = &mac->chip;
242 if (!is_valid_ether_addr(addr->sa_data))
243 return -EADDRNOTAVAIL;
245 dev_dbg_f(zd_mac_dev(mac),
246 "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data));
248 r = zd_write_mac_addr(chip, addr->sa_data);
252 spin_lock_irqsave(&mac->lock, flags);
253 memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
254 spin_unlock_irqrestore(&mac->lock, flags);
259 int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
264 ZD_ASSERT(!irqs_disabled());
265 spin_lock_irq(&mac->lock);
266 if (regdomain == 0) {
267 regdomain = mac->default_regdomain;
269 if (!zd_regdomain_supported(regdomain)) {
270 spin_unlock_irq(&mac->lock);
273 mac->regdomain = regdomain;
274 channel = mac->requested_channel;
275 spin_unlock_irq(&mac->lock);
277 r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
280 if (!zd_regdomain_supports_channel(regdomain, channel)) {
281 r = reset_channel(mac);
289 u8 zd_mac_get_regdomain(struct zd_mac *mac)
294 spin_lock_irqsave(&mac->lock, flags);
295 regdomain = mac->regdomain;
296 spin_unlock_irqrestore(&mac->lock, flags);
300 /* Fallback to lowest rate, if rate is unknown. */
301 static u8 rate_to_zd_rate(u8 rate)
304 case IEEE80211_CCK_RATE_2MB:
305 return ZD_CCK_RATE_2M;
306 case IEEE80211_CCK_RATE_5MB:
307 return ZD_CCK_RATE_5_5M;
308 case IEEE80211_CCK_RATE_11MB:
309 return ZD_CCK_RATE_11M;
310 case IEEE80211_OFDM_RATE_6MB:
311 return ZD_OFDM_RATE_6M;
312 case IEEE80211_OFDM_RATE_9MB:
313 return ZD_OFDM_RATE_9M;
314 case IEEE80211_OFDM_RATE_12MB:
315 return ZD_OFDM_RATE_12M;
316 case IEEE80211_OFDM_RATE_18MB:
317 return ZD_OFDM_RATE_18M;
318 case IEEE80211_OFDM_RATE_24MB:
319 return ZD_OFDM_RATE_24M;
320 case IEEE80211_OFDM_RATE_36MB:
321 return ZD_OFDM_RATE_36M;
322 case IEEE80211_OFDM_RATE_48MB:
323 return ZD_OFDM_RATE_48M;
324 case IEEE80211_OFDM_RATE_54MB:
325 return ZD_OFDM_RATE_54M;
327 return ZD_CCK_RATE_1M;
330 static u16 rate_to_cr_rate(u8 rate)
333 case IEEE80211_CCK_RATE_2MB:
335 case IEEE80211_CCK_RATE_5MB:
337 case IEEE80211_CCK_RATE_11MB:
339 case IEEE80211_OFDM_RATE_6MB:
341 case IEEE80211_OFDM_RATE_9MB:
343 case IEEE80211_OFDM_RATE_12MB:
345 case IEEE80211_OFDM_RATE_18MB:
347 case IEEE80211_OFDM_RATE_24MB:
349 case IEEE80211_OFDM_RATE_36MB:
351 case IEEE80211_OFDM_RATE_48MB:
353 case IEEE80211_OFDM_RATE_54MB:
359 static void try_enable_tx(struct zd_mac *mac)
363 spin_lock_irqsave(&mac->lock, flags);
364 if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
365 netif_wake_queue(mac->netdev);
366 spin_unlock_irqrestore(&mac->lock, flags);
369 static void set_rts_cts_work(struct work_struct *work)
372 container_of(work, struct zd_mac, set_rts_cts_work.work);
375 unsigned int short_preamble;
377 mutex_lock(&mac->chip.mutex);
379 spin_lock_irqsave(&mac->lock, flags);
380 mac->updating_rts_rate = 0;
381 rts_rate = mac->rts_rate;
382 short_preamble = mac->short_preamble;
383 spin_unlock_irqrestore(&mac->lock, flags);
385 zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
386 mutex_unlock(&mac->chip.mutex);
391 static void set_basic_rates_work(struct work_struct *work)
394 container_of(work, struct zd_mac, set_basic_rates_work.work);
398 mutex_lock(&mac->chip.mutex);
400 spin_lock_irqsave(&mac->lock, flags);
401 mac->updating_basic_rates = 0;
402 basic_rates = mac->basic_rates;
403 spin_unlock_irqrestore(&mac->lock, flags);
405 zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
406 mutex_unlock(&mac->chip.mutex);
411 static void bssinfo_change(struct net_device *netdev, u32 changes)
413 struct zd_mac *mac = zd_netdev_mac(netdev);
414 struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
415 struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
416 int need_set_rts_cts = 0;
417 int need_set_rates = 0;
421 dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
423 if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
424 spin_lock_irqsave(&mac->lock, flags);
425 mac->short_preamble = bssinfo->short_preamble;
426 spin_unlock_irqrestore(&mac->lock, flags);
427 need_set_rts_cts = 1;
430 if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
431 /* Set RTS rate to highest available basic rate */
432 u8 rate = ieee80211softmac_highest_supported_rate(softmac,
433 &bssinfo->supported_rates, 1);
434 rate = rate_to_zd_rate(rate);
436 spin_lock_irqsave(&mac->lock, flags);
437 if (rate != mac->rts_rate) {
438 mac->rts_rate = rate;
439 need_set_rts_cts = 1;
441 spin_unlock_irqrestore(&mac->lock, flags);
443 /* Set basic rates */
445 if (bssinfo->supported_rates.count == 0) {
446 /* Allow the device to be flexible */
447 basic_rates = CR_RATES_80211B | CR_RATES_80211G;
452 for (i = 0; i < bssinfo->supported_rates.count; i++) {
453 u16 rate = bssinfo->supported_rates.rates[i];
454 if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
457 rate &= ~IEEE80211_BASIC_RATE_MASK;
458 basic_rates |= rate_to_cr_rate(rate);
461 spin_lock_irqsave(&mac->lock, flags);
462 mac->basic_rates = basic_rates;
463 spin_unlock_irqrestore(&mac->lock, flags);
466 /* Schedule any changes we made above */
468 spin_lock_irqsave(&mac->lock, flags);
469 if (need_set_rts_cts && !mac->updating_rts_rate) {
470 mac->updating_rts_rate = 1;
471 netif_stop_queue(mac->netdev);
472 queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0);
474 if (need_set_rates && !mac->updating_basic_rates) {
475 mac->updating_basic_rates = 1;
476 netif_stop_queue(mac->netdev);
477 queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work,
480 spin_unlock_irqrestore(&mac->lock, flags);
483 static void set_channel(struct net_device *netdev, u8 channel)
485 struct zd_mac *mac = zd_netdev_mac(netdev);
487 dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
489 zd_chip_set_channel(&mac->chip, channel);
492 int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
494 unsigned long lock_flags;
495 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
497 if (ieee->iw_mode == IW_MODE_INFRA)
500 spin_lock_irqsave(&mac->lock, lock_flags);
501 if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
502 spin_unlock_irqrestore(&mac->lock, lock_flags);
505 mac->requested_channel = channel;
506 spin_unlock_irqrestore(&mac->lock, lock_flags);
507 if (netif_running(mac->netdev))
508 return zd_chip_set_channel(&mac->chip, channel);
513 u8 zd_mac_get_channel(struct zd_mac *mac)
515 u8 channel = zd_chip_get_channel(&mac->chip);
517 dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel);
521 /* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
522 static u8 zd_rate_typed(u8 zd_rate)
524 static const u8 typed_rates[16] = {
525 [ZD_CCK_RATE_1M] = ZD_CS_CCK|ZD_CCK_RATE_1M,
526 [ZD_CCK_RATE_2M] = ZD_CS_CCK|ZD_CCK_RATE_2M,
527 [ZD_CCK_RATE_5_5M] = ZD_CS_CCK|ZD_CCK_RATE_5_5M,
528 [ZD_CCK_RATE_11M] = ZD_CS_CCK|ZD_CCK_RATE_11M,
529 [ZD_OFDM_RATE_6M] = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
530 [ZD_OFDM_RATE_9M] = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
531 [ZD_OFDM_RATE_12M] = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
532 [ZD_OFDM_RATE_18M] = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
533 [ZD_OFDM_RATE_24M] = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
534 [ZD_OFDM_RATE_36M] = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
535 [ZD_OFDM_RATE_48M] = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
536 [ZD_OFDM_RATE_54M] = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
539 ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
540 return typed_rates[zd_rate & ZD_CS_RATE_MASK];
543 int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
545 struct ieee80211_device *ieee;
551 mac->netdev->type = ARPHRD_ETHER;
553 case IW_MODE_MONITOR:
554 mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
557 dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
561 ieee = zd_mac_to_ieee80211(mac);
562 ZD_ASSERT(!irqs_disabled());
563 spin_lock_irq(&ieee->lock);
564 ieee->iw_mode = mode;
565 spin_unlock_irq(&ieee->lock);
567 if (netif_running(mac->netdev))
568 return reset_mode(mac);
573 int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
576 struct ieee80211_device *ieee;
578 ieee = zd_mac_to_ieee80211(mac);
579 spin_lock_irqsave(&ieee->lock, flags);
580 *mode = ieee->iw_mode;
581 spin_unlock_irqrestore(&ieee->lock, flags);
585 int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
588 const struct channel_range *channel_range;
591 memset(range, 0, sizeof(*range));
593 /* FIXME: Not so important and depends on the mode. For 802.11g
594 * usually this value is used. It seems to be that Bit/s number is
597 range->throughput = 27 * 1000 * 1000;
599 range->max_qual.qual = 100;
600 range->max_qual.level = 100;
602 /* FIXME: Needs still to be tuned. */
603 range->avg_qual.qual = 71;
604 range->avg_qual.level = 80;
606 /* FIXME: depends on standard? */
607 range->min_rts = 256;
608 range->max_rts = 2346;
610 range->min_frag = MIN_FRAG_THRESHOLD;
611 range->max_frag = MAX_FRAG_THRESHOLD;
613 range->max_encoding_tokens = WEP_KEYS;
614 range->num_encoding_sizes = 2;
615 range->encoding_size[0] = 5;
616 range->encoding_size[1] = WEP_KEY_LEN;
618 range->we_version_compiled = WIRELESS_EXT;
619 range->we_version_source = 20;
621 ZD_ASSERT(!irqs_disabled());
622 spin_lock_irq(&mac->lock);
623 regdomain = mac->regdomain;
624 spin_unlock_irq(&mac->lock);
625 channel_range = zd_channel_range(regdomain);
627 range->num_channels = channel_range->end - channel_range->start;
628 range->old_num_channels = range->num_channels;
629 range->num_frequency = range->num_channels;
630 range->old_num_frequency = range->num_frequency;
632 for (i = 0; i < range->num_frequency; i++) {
633 struct iw_freq *freq = &range->freq[i];
634 freq->i = channel_range->start + i;
635 zd_channel_to_freq(freq, freq->i);
641 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
643 static const u8 rate_divisor[] = {
644 [ZD_CCK_RATE_1M] = 1,
645 [ZD_CCK_RATE_2M] = 2,
646 [ZD_CCK_RATE_5_5M] = 11, /* bits must be doubled */
647 [ZD_CCK_RATE_11M] = 11,
648 [ZD_OFDM_RATE_6M] = 6,
649 [ZD_OFDM_RATE_9M] = 9,
650 [ZD_OFDM_RATE_12M] = 12,
651 [ZD_OFDM_RATE_18M] = 18,
652 [ZD_OFDM_RATE_24M] = 24,
653 [ZD_OFDM_RATE_36M] = 36,
654 [ZD_OFDM_RATE_48M] = 48,
655 [ZD_OFDM_RATE_54M] = 54,
658 u32 bits = (u32)tx_length * 8;
661 divisor = rate_divisor[zd_rate];
666 case ZD_CCK_RATE_5_5M:
667 bits = (2*bits) + 10; /* round up to the next integer */
669 case ZD_CCK_RATE_11M:
672 *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
673 if (0 < t && t <= 3) {
674 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
677 bits += 10; /* round up to the next integer */
685 R2M_SHORT_PREAMBLE = 0x01,
689 static u8 zd_rate_to_modulation(u8 zd_rate, int flags)
693 modulation = zd_rate_typed(zd_rate);
694 if (flags & R2M_SHORT_PREAMBLE) {
695 switch (ZD_CS_RATE(modulation)) {
697 case ZD_CCK_RATE_5_5M:
698 case ZD_CCK_RATE_11M:
699 modulation |= ZD_CS_CCK_PREA_SHORT;
703 if (flags & R2M_11A) {
704 if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM)
705 modulation |= ZD_CS_OFDM_MODE_11A;
710 static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
711 struct ieee80211_hdr_4addr *hdr)
713 struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
714 u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
716 int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
717 int is_multicast = is_multicast_ether_addr(hdr->addr1);
718 int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
719 is_multicast, is_mgt);
722 /* FIXME: 802.11a? */
723 rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
726 flags |= R2M_SHORT_PREAMBLE;
728 zd_rate = rate_to_zd_rate(rate);
729 cs->modulation = zd_rate_to_modulation(zd_rate, flags);
732 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
733 struct ieee80211_hdr_4addr *header)
735 struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
736 unsigned int tx_length = le16_to_cpu(cs->tx_length);
737 u16 fctl = le16_to_cpu(header->frame_ctl);
738 u16 ftype = WLAN_FC_GET_TYPE(fctl);
739 u16 stype = WLAN_FC_GET_STYPE(fctl);
743 * - if backoff needed, enable bit 0
744 * - if burst (backoff not needed) disable bit 0
750 if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0)
751 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
754 if (is_multicast_ether_addr(header->addr1))
755 cs->control |= ZD_CS_MULTICAST;
758 if (stype == IEEE80211_STYPE_PSPOLL)
759 cs->control |= ZD_CS_PS_POLL_FRAME;
761 /* Unicast data frames over the threshold should have RTS */
762 if (!is_multicast_ether_addr(header->addr1) &&
763 ftype != IEEE80211_FTYPE_MGMT &&
764 tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
765 cs->control |= ZD_CS_RTS;
767 /* Use CTS-to-self protection if required */
768 if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM &&
769 ieee80211softmac_protection_needed(softmac)) {
770 /* FIXME: avoid sending RTS *and* self-CTS, is that correct? */
771 cs->control &= ~ZD_CS_RTS;
772 cs->control |= ZD_CS_SELF_CTS;
775 /* FIXME: Management frame? */
778 static int fill_ctrlset(struct zd_mac *mac,
779 struct ieee80211_txb *txb,
783 struct sk_buff *skb = txb->fragments[frag_num];
784 struct ieee80211_hdr_4addr *hdr =
785 (struct ieee80211_hdr_4addr *) skb->data;
786 unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
787 unsigned int next_frag_len;
788 unsigned int packet_length;
789 struct zd_ctrlset *cs = (struct zd_ctrlset *)
790 skb_push(skb, sizeof(struct zd_ctrlset));
792 if (frag_num+1 < txb->nr_frags) {
793 next_frag_len = txb->fragments[frag_num+1]->len +
798 ZD_ASSERT(frag_len <= 0xffff);
799 ZD_ASSERT(next_frag_len <= 0xffff);
801 cs_set_modulation(mac, cs, hdr);
803 cs->tx_length = cpu_to_le16(frag_len);
805 cs_set_control(mac, cs, hdr);
807 packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
808 ZD_ASSERT(packet_length <= 0xffff);
809 /* ZD1211B: Computing the length difference this way, gives us
810 * flexibility to compute the packet length.
812 cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ?
813 packet_length - frag_len : packet_length);
817 * - transmit frame length in microseconds
818 * - seems to be derived from frame length
819 * - see Cal_Us_Service() in zdinlinef.h
820 * - if macp->bTxBurstEnable is enabled, then multiply by 4
821 * - bTxBurstEnable is never set in the vendor driver
824 * - "for PLCP configuration"
825 * - always 0 except in some situations at 802.11b 11M
826 * - see line 53 of zdinlinef.h
829 r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
830 le16_to_cpu(cs->tx_length));
833 cs->current_length = cpu_to_le16(r);
835 if (next_frag_len == 0) {
836 cs->next_frame_length = 0;
838 r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
842 cs->next_frame_length = cpu_to_le16(r);
848 static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
852 for (i = 0; i < txb->nr_frags; i++) {
853 struct sk_buff *skb = txb->fragments[i];
855 r = fill_ctrlset(mac, txb, i);
858 r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
863 /* FIXME: shouldn't this be handled by the upper layers? */
864 mac->netdev->trans_start = jiffies;
866 ieee80211_txb_free(txb);
871 struct ieee80211_radiotap_header rt_hdr;
876 } __attribute__((packed));
878 static void fill_rt_header(void *buffer, struct zd_mac *mac,
879 const struct ieee80211_rx_stats *stats,
880 const struct rx_status *status)
882 struct zd_rt_hdr *hdr = buffer;
884 hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
885 hdr->rt_hdr.it_pad = 0;
886 hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
887 hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
888 (1 << IEEE80211_RADIOTAP_CHANNEL) |
889 (1 << IEEE80211_RADIOTAP_RATE));
892 if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
893 hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
895 hdr->rt_rate = stats->rate / 5;
898 hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
899 _zd_chip_get_channel(&mac->chip)));
900 hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
901 ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
902 ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
905 /* Returns 1 if the data packet is for us and 0 otherwise. */
906 static int is_data_packet_for_us(struct ieee80211_device *ieee,
907 struct ieee80211_hdr_4addr *hdr)
909 struct net_device *netdev = ieee->dev;
910 u16 fc = le16_to_cpu(hdr->frame_ctl);
912 ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
914 switch (ieee->iw_mode) {
916 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
917 memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) != 0)
922 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
923 IEEE80211_FCTL_FROMDS ||
924 memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) != 0)
928 ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
932 return memcmp(hdr->addr1, netdev->dev_addr, ETH_ALEN) == 0 ||
933 is_multicast_ether_addr(hdr->addr1) ||
934 (netdev->flags & IFF_PROMISC);
937 /* Filters received packets. The function returns 1 if the packet should be
938 * forwarded to ieee80211_rx(). If the packet should be ignored the function
939 * returns 0. If an invalid packet is found the function returns -EINVAL.
941 * The function calls ieee80211_rx_mgt() directly.
943 * It has been based on ieee80211_rx_any.
945 static int filter_rx(struct ieee80211_device *ieee,
946 const u8 *buffer, unsigned int length,
947 struct ieee80211_rx_stats *stats)
949 struct ieee80211_hdr_4addr *hdr;
952 if (ieee->iw_mode == IW_MODE_MONITOR)
955 hdr = (struct ieee80211_hdr_4addr *)buffer;
956 fc = le16_to_cpu(hdr->frame_ctl);
957 if ((fc & IEEE80211_FCTL_VERS) != 0)
960 switch (WLAN_FC_GET_TYPE(fc)) {
961 case IEEE80211_FTYPE_MGMT:
962 if (length < sizeof(struct ieee80211_hdr_3addr))
964 ieee80211_rx_mgt(ieee, hdr, stats);
966 case IEEE80211_FTYPE_CTL:
968 case IEEE80211_FTYPE_DATA:
969 /* Ignore invalid short buffers */
970 if (length < sizeof(struct ieee80211_hdr_3addr))
972 return is_data_packet_for_us(ieee, hdr);
978 static void update_qual_rssi(struct zd_mac *mac,
979 const u8 *buffer, unsigned int length,
980 u8 qual_percent, u8 rssi_percent)
983 struct ieee80211_hdr_3addr *hdr;
986 hdr = (struct ieee80211_hdr_3addr *)buffer;
987 if (length < offsetof(struct ieee80211_hdr_3addr, addr3))
989 if (memcmp(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid, ETH_ALEN) != 0)
992 spin_lock_irqsave(&mac->lock, flags);
993 i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE;
994 mac->qual_buffer[i] = qual_percent;
995 mac->rssi_buffer[i] = rssi_percent;
997 spin_unlock_irqrestore(&mac->lock, flags);
1000 static int fill_rx_stats(struct ieee80211_rx_stats *stats,
1001 const struct rx_status **pstatus,
1003 const u8 *buffer, unsigned int length)
1005 const struct rx_status *status;
1007 *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status));
1008 if (status->frame_status & ZD_RX_ERROR) {
1009 /* FIXME: update? */
1012 memset(stats, 0, sizeof(struct ieee80211_rx_stats));
1013 stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
1014 + sizeof(struct rx_status));
1015 /* FIXME: 802.11a */
1016 stats->freq = IEEE80211_24GHZ_BAND;
1017 stats->received_channel = _zd_chip_get_channel(&mac->chip);
1018 stats->rssi = zd_rx_strength_percent(status->signal_strength);
1019 stats->signal = zd_rx_qual_percent(buffer,
1020 length - sizeof(struct rx_status),
1022 stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
1023 stats->rate = zd_rx_rate(buffer, status);
1025 stats->mask |= IEEE80211_STATMASK_RATE;
1030 int zd_mac_rx(struct zd_mac *mac, const u8 *buffer, unsigned int length)
1033 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
1034 struct ieee80211_rx_stats stats;
1035 const struct rx_status *status;
1036 struct sk_buff *skb;
1038 if (length < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
1039 IEEE80211_FCS_LEN + sizeof(struct rx_status))
1042 r = fill_rx_stats(&stats, &status, mac, buffer, length);
1046 length -= ZD_PLCP_HEADER_SIZE+IEEE80211_FCS_LEN+
1047 sizeof(struct rx_status);
1048 buffer += ZD_PLCP_HEADER_SIZE;
1050 update_qual_rssi(mac, buffer, length, stats.signal, stats.rssi);
1052 r = filter_rx(ieee, buffer, length, &stats);
1056 skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
1059 if (ieee->iw_mode == IW_MODE_MONITOR)
1060 fill_rt_header(skb_put(skb, sizeof(struct zd_rt_hdr)), mac,
1062 memcpy(skb_put(skb, length), buffer, length);
1064 r = ieee80211_rx(ieee, skb, &stats);
1066 ZD_ASSERT(in_irq());
1067 dev_kfree_skb_irq(skb);
1072 static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
1075 return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
1078 static void set_security(struct net_device *netdev,
1079 struct ieee80211_security *sec)
1081 struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
1082 struct ieee80211_security *secinfo = &ieee->sec;
1085 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
1087 for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
1088 if (sec->flags & (1<<keyidx)) {
1089 secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
1090 secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
1091 memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
1095 if (sec->flags & SEC_ACTIVE_KEY) {
1096 secinfo->active_key = sec->active_key;
1097 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1098 " .active_key = %d\n", sec->active_key);
1100 if (sec->flags & SEC_UNICAST_GROUP) {
1101 secinfo->unicast_uses_group = sec->unicast_uses_group;
1102 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1103 " .unicast_uses_group = %d\n",
1104 sec->unicast_uses_group);
1106 if (sec->flags & SEC_LEVEL) {
1107 secinfo->level = sec->level;
1108 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1109 " .level = %d\n", sec->level);
1111 if (sec->flags & SEC_ENABLED) {
1112 secinfo->enabled = sec->enabled;
1113 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1114 " .enabled = %d\n", sec->enabled);
1116 if (sec->flags & SEC_ENCRYPT) {
1117 secinfo->encrypt = sec->encrypt;
1118 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1119 " .encrypt = %d\n", sec->encrypt);
1121 if (sec->flags & SEC_AUTH_MODE) {
1122 secinfo->auth_mode = sec->auth_mode;
1123 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
1124 " .auth_mode = %d\n", sec->auth_mode);
1128 static void ieee_init(struct ieee80211_device *ieee)
1130 ieee->mode = IEEE_B | IEEE_G;
1131 ieee->freq_band = IEEE80211_24GHZ_BAND;
1132 ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
1133 ieee->tx_headroom = sizeof(struct zd_ctrlset);
1134 ieee->set_security = set_security;
1135 ieee->hard_start_xmit = netdev_tx;
1137 /* Software encryption/decryption for now */
1138 ieee->host_build_iv = 0;
1139 ieee->host_encrypt = 1;
1140 ieee->host_decrypt = 1;
1142 /* FIXME: default to managed mode, until ieee80211 and zd1211rw can
1143 * correctly support AUTO */
1144 ieee->iw_mode = IW_MODE_INFRA;
1147 static void softmac_init(struct ieee80211softmac_device *sm)
1149 sm->set_channel = set_channel;
1150 sm->bssinfo_change = bssinfo_change;
1153 struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
1155 struct zd_mac *mac = zd_netdev_mac(ndev);
1156 struct iw_statistics *iw_stats = &mac->iw_stats;
1157 unsigned int i, count, qual_total, rssi_total;
1159 memset(iw_stats, 0, sizeof(struct iw_statistics));
1160 /* We are not setting the status, because ieee->state is not updated
1161 * at all and this driver doesn't track authentication state.
1163 spin_lock_irq(&mac->lock);
1164 count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ?
1165 mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE;
1166 qual_total = rssi_total = 0;
1167 for (i = 0; i < count; i++) {
1168 qual_total += mac->qual_buffer[i];
1169 rssi_total += mac->rssi_buffer[i];
1171 spin_unlock_irq(&mac->lock);
1172 iw_stats->qual.updated = IW_QUAL_NOISE_INVALID;
1174 iw_stats->qual.qual = qual_total / count;
1175 iw_stats->qual.level = rssi_total / count;
1176 iw_stats->qual.updated |=
1177 IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED;
1179 iw_stats->qual.updated |=
1180 IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID;
1182 /* TODO: update counter */
1186 #define LINK_LED_WORK_DELAY HZ
1188 static void link_led_handler(struct work_struct *work)
1190 struct zd_mac *mac =
1191 container_of(work, struct zd_mac, housekeeping.link_led_work.work);
1192 struct zd_chip *chip = &mac->chip;
1193 struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev);
1197 spin_lock_irq(&mac->lock);
1198 is_associated = sm->associnfo.associated != 0;
1199 spin_unlock_irq(&mac->lock);
1201 r = zd_chip_control_leds(chip,
1202 is_associated ? LED_ASSOCIATED : LED_SCANNING);
1204 dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
1206 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1207 LINK_LED_WORK_DELAY);
1210 static void housekeeping_init(struct zd_mac *mac)
1212 INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
1215 static void housekeeping_enable(struct zd_mac *mac)
1217 dev_dbg_f(zd_mac_dev(mac), "\n");
1218 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1222 static void housekeeping_disable(struct zd_mac *mac)
1224 dev_dbg_f(zd_mac_dev(mac), "\n");
1225 cancel_rearming_delayed_workqueue(zd_workqueue,
1226 &mac->housekeeping.link_led_work);
1227 zd_chip_control_leds(&mac->chip, LED_OFF);