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);
36 static void housekeeping_init(struct zd_mac *mac);
37 static void housekeeping_enable(struct zd_mac *mac);
38 static void housekeeping_disable(struct zd_mac *mac);
40 int zd_mac_init(struct zd_mac *mac,
41 struct net_device *netdev,
42 struct usb_interface *intf)
44 struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
46 memset(mac, 0, sizeof(*mac));
47 spin_lock_init(&mac->lock);
51 softmac_init(ieee80211_priv(netdev));
52 zd_chip_init(&mac->chip, netdev, intf);
53 housekeeping_init(mac);
57 static int reset_channel(struct zd_mac *mac)
61 const struct channel_range *range;
63 spin_lock_irqsave(&mac->lock, flags);
64 range = zd_channel_range(mac->regdomain);
69 mac->requested_channel = range->start;
72 spin_unlock_irqrestore(&mac->lock, flags);
76 int zd_mac_init_hw(struct zd_mac *mac, u8 device_type)
79 struct zd_chip *chip = &mac->chip;
83 r = zd_chip_enable_int(chip);
86 r = zd_chip_init_hw(chip, device_type);
90 zd_get_e2p_mac_addr(chip, addr);
91 r = zd_write_mac_addr(chip, addr);
94 ZD_ASSERT(!irqs_disabled());
95 spin_lock_irq(&mac->lock);
96 memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
97 spin_unlock_irq(&mac->lock);
99 r = zd_read_regdomain(chip, &default_regdomain);
102 if (!zd_regdomain_supported(default_regdomain)) {
103 dev_dbg_f(zd_mac_dev(mac),
104 "Regulatory Domain %#04x is not supported.\n",
109 spin_lock_irq(&mac->lock);
110 mac->regdomain = mac->default_regdomain = default_regdomain;
111 spin_unlock_irq(&mac->lock);
112 r = reset_channel(mac);
116 /* We must inform the device that we are doing encryption/decryption in
117 * software at the moment. */
118 r = zd_set_encryption_type(chip, ENC_SNIFFER);
122 r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain);
128 zd_chip_disable_int(chip);
133 void zd_mac_clear(struct zd_mac *mac)
135 zd_chip_clear(&mac->chip);
136 ZD_ASSERT(!spin_is_locked(&mac->lock));
137 ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
140 static int reset_mode(struct zd_mac *mac)
142 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
143 struct zd_ioreq32 ioreqs[3] = {
144 { CR_RX_FILTER, STA_RX_FILTER },
145 { CR_SNIFFER_ON, 0U },
148 if (ieee->iw_mode == IW_MODE_MONITOR) {
149 ioreqs[0].value = 0xffffffff;
150 ioreqs[1].value = 0x1;
151 ioreqs[2].value = ENC_SNIFFER;
154 return zd_iowrite32a(&mac->chip, ioreqs, 3);
157 int zd_mac_open(struct net_device *netdev)
159 struct zd_mac *mac = zd_netdev_mac(netdev);
160 struct zd_chip *chip = &mac->chip;
163 r = zd_chip_enable_int(chip);
167 r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
173 r = zd_chip_switch_radio_on(chip);
176 r = zd_chip_set_channel(chip, mac->requested_channel);
179 r = zd_chip_enable_rx(chip);
182 r = zd_chip_enable_hwint(chip);
186 housekeeping_enable(mac);
187 ieee80211softmac_start(netdev);
190 zd_chip_disable_rx(chip);
192 zd_chip_switch_radio_off(chip);
194 zd_chip_disable_int(chip);
199 int zd_mac_stop(struct net_device *netdev)
201 struct zd_mac *mac = zd_netdev_mac(netdev);
202 struct zd_chip *chip = &mac->chip;
204 netif_stop_queue(netdev);
207 * The order here deliberately is a little different from the open()
208 * method, since we need to make sure there is no opportunity for RX
209 * frames to be processed by softmac after we have stopped it.
212 zd_chip_disable_rx(chip);
213 housekeeping_disable(mac);
214 ieee80211softmac_stop(netdev);
216 zd_chip_disable_hwint(chip);
217 zd_chip_switch_radio_off(chip);
218 zd_chip_disable_int(chip);
223 int zd_mac_set_mac_address(struct net_device *netdev, void *p)
227 struct sockaddr *addr = p;
228 struct zd_mac *mac = zd_netdev_mac(netdev);
229 struct zd_chip *chip = &mac->chip;
231 if (!is_valid_ether_addr(addr->sa_data))
232 return -EADDRNOTAVAIL;
234 dev_dbg_f(zd_mac_dev(mac),
235 "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data));
237 r = zd_write_mac_addr(chip, addr->sa_data);
241 spin_lock_irqsave(&mac->lock, flags);
242 memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
243 spin_unlock_irqrestore(&mac->lock, flags);
248 int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
253 ZD_ASSERT(!irqs_disabled());
254 spin_lock_irq(&mac->lock);
255 if (regdomain == 0) {
256 regdomain = mac->default_regdomain;
258 if (!zd_regdomain_supported(regdomain)) {
259 spin_unlock_irq(&mac->lock);
262 mac->regdomain = regdomain;
263 channel = mac->requested_channel;
264 spin_unlock_irq(&mac->lock);
266 r = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain);
269 if (!zd_regdomain_supports_channel(regdomain, channel)) {
270 r = reset_channel(mac);
278 u8 zd_mac_get_regdomain(struct zd_mac *mac)
283 spin_lock_irqsave(&mac->lock, flags);
284 regdomain = mac->regdomain;
285 spin_unlock_irqrestore(&mac->lock, flags);
289 static void set_channel(struct net_device *netdev, u8 channel)
291 struct zd_mac *mac = zd_netdev_mac(netdev);
293 dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel);
295 zd_chip_set_channel(&mac->chip, channel);
298 int zd_mac_request_channel(struct zd_mac *mac, u8 channel)
300 unsigned long lock_flags;
301 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
303 if (ieee->iw_mode == IW_MODE_INFRA)
306 spin_lock_irqsave(&mac->lock, lock_flags);
307 if (!zd_regdomain_supports_channel(mac->regdomain, channel)) {
308 spin_unlock_irqrestore(&mac->lock, lock_flags);
311 mac->requested_channel = channel;
312 spin_unlock_irqrestore(&mac->lock, lock_flags);
313 if (netif_running(mac->netdev))
314 return zd_chip_set_channel(&mac->chip, channel);
319 u8 zd_mac_get_channel(struct zd_mac *mac)
321 u8 channel = zd_chip_get_channel(&mac->chip);
323 dev_dbg_f(zd_mac_dev(mac), "channel %u\n", channel);
327 /* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
328 static u8 zd_rate_typed(u8 zd_rate)
330 static const u8 typed_rates[16] = {
331 [ZD_CCK_RATE_1M] = ZD_CS_CCK|ZD_CCK_RATE_1M,
332 [ZD_CCK_RATE_2M] = ZD_CS_CCK|ZD_CCK_RATE_2M,
333 [ZD_CCK_RATE_5_5M] = ZD_CS_CCK|ZD_CCK_RATE_5_5M,
334 [ZD_CCK_RATE_11M] = ZD_CS_CCK|ZD_CCK_RATE_11M,
335 [ZD_OFDM_RATE_6M] = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
336 [ZD_OFDM_RATE_9M] = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
337 [ZD_OFDM_RATE_12M] = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
338 [ZD_OFDM_RATE_18M] = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
339 [ZD_OFDM_RATE_24M] = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
340 [ZD_OFDM_RATE_36M] = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
341 [ZD_OFDM_RATE_48M] = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
342 [ZD_OFDM_RATE_54M] = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
345 ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
346 return typed_rates[zd_rate & ZD_CS_RATE_MASK];
349 /* Fallback to lowest rate, if rate is unknown. */
350 static u8 rate_to_zd_rate(u8 rate)
353 case IEEE80211_CCK_RATE_2MB:
354 return ZD_CCK_RATE_2M;
355 case IEEE80211_CCK_RATE_5MB:
356 return ZD_CCK_RATE_5_5M;
357 case IEEE80211_CCK_RATE_11MB:
358 return ZD_CCK_RATE_11M;
359 case IEEE80211_OFDM_RATE_6MB:
360 return ZD_OFDM_RATE_6M;
361 case IEEE80211_OFDM_RATE_9MB:
362 return ZD_OFDM_RATE_9M;
363 case IEEE80211_OFDM_RATE_12MB:
364 return ZD_OFDM_RATE_12M;
365 case IEEE80211_OFDM_RATE_18MB:
366 return ZD_OFDM_RATE_18M;
367 case IEEE80211_OFDM_RATE_24MB:
368 return ZD_OFDM_RATE_24M;
369 case IEEE80211_OFDM_RATE_36MB:
370 return ZD_OFDM_RATE_36M;
371 case IEEE80211_OFDM_RATE_48MB:
372 return ZD_OFDM_RATE_48M;
373 case IEEE80211_OFDM_RATE_54MB:
374 return ZD_OFDM_RATE_54M;
376 return ZD_CCK_RATE_1M;
379 int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
381 struct ieee80211_device *ieee;
387 mac->netdev->type = ARPHRD_ETHER;
389 case IW_MODE_MONITOR:
390 mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP;
393 dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode);
397 ieee = zd_mac_to_ieee80211(mac);
398 ZD_ASSERT(!irqs_disabled());
399 spin_lock_irq(&ieee->lock);
400 ieee->iw_mode = mode;
401 spin_unlock_irq(&ieee->lock);
403 if (netif_running(mac->netdev))
404 return reset_mode(mac);
409 int zd_mac_get_mode(struct zd_mac *mac, u32 *mode)
412 struct ieee80211_device *ieee;
414 ieee = zd_mac_to_ieee80211(mac);
415 spin_lock_irqsave(&ieee->lock, flags);
416 *mode = ieee->iw_mode;
417 spin_unlock_irqrestore(&ieee->lock, flags);
421 int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
424 const struct channel_range *channel_range;
427 memset(range, 0, sizeof(*range));
429 /* FIXME: Not so important and depends on the mode. For 802.11g
430 * usually this value is used. It seems to be that Bit/s number is
433 range->throughput = 27 * 1000 * 1000;
435 range->max_qual.qual = 100;
436 range->max_qual.level = 100;
438 /* FIXME: Needs still to be tuned. */
439 range->avg_qual.qual = 71;
440 range->avg_qual.level = 80;
442 /* FIXME: depends on standard? */
443 range->min_rts = 256;
444 range->max_rts = 2346;
446 range->min_frag = MIN_FRAG_THRESHOLD;
447 range->max_frag = MAX_FRAG_THRESHOLD;
449 range->max_encoding_tokens = WEP_KEYS;
450 range->num_encoding_sizes = 2;
451 range->encoding_size[0] = 5;
452 range->encoding_size[1] = WEP_KEY_LEN;
454 range->we_version_compiled = WIRELESS_EXT;
455 range->we_version_source = 20;
457 ZD_ASSERT(!irqs_disabled());
458 spin_lock_irq(&mac->lock);
459 regdomain = mac->regdomain;
460 spin_unlock_irq(&mac->lock);
461 channel_range = zd_channel_range(regdomain);
463 range->num_channels = channel_range->end - channel_range->start;
464 range->old_num_channels = range->num_channels;
465 range->num_frequency = range->num_channels;
466 range->old_num_frequency = range->num_frequency;
468 for (i = 0; i < range->num_frequency; i++) {
469 struct iw_freq *freq = &range->freq[i];
470 freq->i = channel_range->start + i;
471 zd_channel_to_freq(freq, freq->i);
477 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
479 static const u8 rate_divisor[] = {
480 [ZD_CCK_RATE_1M] = 1,
481 [ZD_CCK_RATE_2M] = 2,
482 [ZD_CCK_RATE_5_5M] = 11, /* bits must be doubled */
483 [ZD_CCK_RATE_11M] = 11,
484 [ZD_OFDM_RATE_6M] = 6,
485 [ZD_OFDM_RATE_9M] = 9,
486 [ZD_OFDM_RATE_12M] = 12,
487 [ZD_OFDM_RATE_18M] = 18,
488 [ZD_OFDM_RATE_24M] = 24,
489 [ZD_OFDM_RATE_36M] = 36,
490 [ZD_OFDM_RATE_48M] = 48,
491 [ZD_OFDM_RATE_54M] = 54,
494 u32 bits = (u32)tx_length * 8;
497 divisor = rate_divisor[zd_rate];
502 case ZD_CCK_RATE_5_5M:
503 bits = (2*bits) + 10; /* round up to the next integer */
505 case ZD_CCK_RATE_11M:
508 *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
509 if (0 < t && t <= 3) {
510 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
513 bits += 10; /* round up to the next integer */
521 R2M_SHORT_PREAMBLE = 0x01,
525 static u8 zd_rate_to_modulation(u8 zd_rate, int flags)
529 modulation = zd_rate_typed(zd_rate);
530 if (flags & R2M_SHORT_PREAMBLE) {
531 switch (ZD_CS_RATE(modulation)) {
533 case ZD_CCK_RATE_5_5M:
534 case ZD_CCK_RATE_11M:
535 modulation |= ZD_CS_CCK_PREA_SHORT;
539 if (flags & R2M_11A) {
540 if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM)
541 modulation |= ZD_CS_OFDM_MODE_11A;
546 static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
547 struct ieee80211_hdr_4addr *hdr)
549 struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
550 u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
552 int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
554 /* FIXME: 802.11a? short preamble? */
555 rate = ieee80211softmac_suggest_txrate(softmac,
556 is_multicast_ether_addr(hdr->addr1), is_mgt);
558 zd_rate = rate_to_zd_rate(rate);
559 cs->modulation = zd_rate_to_modulation(zd_rate, 0);
562 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
563 struct ieee80211_hdr_4addr *header)
565 unsigned int tx_length = le16_to_cpu(cs->tx_length);
566 u16 fctl = le16_to_cpu(header->frame_ctl);
567 u16 ftype = WLAN_FC_GET_TYPE(fctl);
568 u16 stype = WLAN_FC_GET_STYPE(fctl);
573 * - if fragment 0, enable bit 0
574 * - if backoff needed, enable bit 0
575 * - if burst (backoff not needed) disable bit 0
576 * - if multicast, enable bit 1
577 * - if PS-POLL frame, enable bit 2
578 * - if in INDEPENDENT_BSS mode and zd1205_DestPowerSave, then enable
580 * - if frag_len > RTS threshold, set bit 5 as long if it isnt
582 * - if bit 5 is set, and we are in OFDM mode, unset bit 5 and set bit
589 if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0)
590 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
593 if (is_multicast_ether_addr(header->addr1))
594 cs->control |= ZD_CS_MULTICAST;
597 if (stype == IEEE80211_STYPE_PSPOLL)
598 cs->control |= ZD_CS_PS_POLL_FRAME;
600 if (!is_multicast_ether_addr(header->addr1) &&
601 ftype != IEEE80211_FTYPE_MGMT &&
602 tx_length > zd_netdev_ieee80211(mac->netdev)->rts)
604 /* FIXME: check the logic */
605 if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM) {
607 cs->control |= ZD_CS_SELF_CTS;
608 } else { /* 802.11b */
609 cs->control |= ZD_CS_RTS;
613 /* FIXME: Management frame? */
616 static int fill_ctrlset(struct zd_mac *mac,
617 struct ieee80211_txb *txb,
621 struct sk_buff *skb = txb->fragments[frag_num];
622 struct ieee80211_hdr_4addr *hdr =
623 (struct ieee80211_hdr_4addr *) skb->data;
624 unsigned int frag_len = skb->len + IEEE80211_FCS_LEN;
625 unsigned int next_frag_len;
626 unsigned int packet_length;
627 struct zd_ctrlset *cs = (struct zd_ctrlset *)
628 skb_push(skb, sizeof(struct zd_ctrlset));
630 if (frag_num+1 < txb->nr_frags) {
631 next_frag_len = txb->fragments[frag_num+1]->len +
636 ZD_ASSERT(frag_len <= 0xffff);
637 ZD_ASSERT(next_frag_len <= 0xffff);
639 cs_set_modulation(mac, cs, hdr);
641 cs->tx_length = cpu_to_le16(frag_len);
643 cs_set_control(mac, cs, hdr);
645 packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
646 ZD_ASSERT(packet_length <= 0xffff);
647 /* ZD1211B: Computing the length difference this way, gives us
648 * flexibility to compute the packet length.
650 cs->packet_length = cpu_to_le16(mac->chip.is_zd1211b ?
651 packet_length - frag_len : packet_length);
655 * - transmit frame length in microseconds
656 * - seems to be derived from frame length
657 * - see Cal_Us_Service() in zdinlinef.h
658 * - if macp->bTxBurstEnable is enabled, then multiply by 4
659 * - bTxBurstEnable is never set in the vendor driver
662 * - "for PLCP configuration"
663 * - always 0 except in some situations at 802.11b 11M
664 * - see line 53 of zdinlinef.h
667 r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
668 le16_to_cpu(cs->tx_length));
671 cs->current_length = cpu_to_le16(r);
673 if (next_frag_len == 0) {
674 cs->next_frame_length = 0;
676 r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
680 cs->next_frame_length = cpu_to_le16(r);
686 static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri)
690 for (i = 0; i < txb->nr_frags; i++) {
691 struct sk_buff *skb = txb->fragments[i];
693 r = fill_ctrlset(mac, txb, i);
696 r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len);
701 /* FIXME: shouldn't this be handled by the upper layers? */
702 mac->netdev->trans_start = jiffies;
704 ieee80211_txb_free(txb);
709 struct ieee80211_radiotap_header rt_hdr;
714 } __attribute__((packed));
716 static void fill_rt_header(void *buffer, struct zd_mac *mac,
717 const struct ieee80211_rx_stats *stats,
718 const struct rx_status *status)
720 struct zd_rt_hdr *hdr = buffer;
722 hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
723 hdr->rt_hdr.it_pad = 0;
724 hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr));
725 hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
726 (1 << IEEE80211_RADIOTAP_CHANNEL) |
727 (1 << IEEE80211_RADIOTAP_RATE));
730 if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256))
731 hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP;
733 hdr->rt_rate = stats->rate / 5;
736 hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz(
737 _zd_chip_get_channel(&mac->chip)));
738 hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ |
739 ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) ==
740 ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK));
743 /* Returns 1 if the data packet is for us and 0 otherwise. */
744 static int is_data_packet_for_us(struct ieee80211_device *ieee,
745 struct ieee80211_hdr_4addr *hdr)
747 struct net_device *netdev = ieee->dev;
748 u16 fc = le16_to_cpu(hdr->frame_ctl);
750 ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA);
752 switch (ieee->iw_mode) {
754 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 ||
755 memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) != 0)
760 if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) !=
761 IEEE80211_FCTL_FROMDS ||
762 memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) != 0)
766 ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR);
770 return memcmp(hdr->addr1, netdev->dev_addr, ETH_ALEN) == 0 ||
771 is_multicast_ether_addr(hdr->addr1) ||
772 (netdev->flags & IFF_PROMISC);
775 /* Filters received packets. The function returns 1 if the packet should be
776 * forwarded to ieee80211_rx(). If the packet should be ignored the function
777 * returns 0. If an invalid packet is found the function returns -EINVAL.
779 * The function calls ieee80211_rx_mgt() directly.
781 * It has been based on ieee80211_rx_any.
783 static int filter_rx(struct ieee80211_device *ieee,
784 const u8 *buffer, unsigned int length,
785 struct ieee80211_rx_stats *stats)
787 struct ieee80211_hdr_4addr *hdr;
790 if (ieee->iw_mode == IW_MODE_MONITOR)
793 hdr = (struct ieee80211_hdr_4addr *)buffer;
794 fc = le16_to_cpu(hdr->frame_ctl);
795 if ((fc & IEEE80211_FCTL_VERS) != 0)
798 switch (WLAN_FC_GET_TYPE(fc)) {
799 case IEEE80211_FTYPE_MGMT:
800 if (length < sizeof(struct ieee80211_hdr_3addr))
802 ieee80211_rx_mgt(ieee, hdr, stats);
804 case IEEE80211_FTYPE_CTL:
806 case IEEE80211_FTYPE_DATA:
807 /* Ignore invalid short buffers */
808 if (length < sizeof(struct ieee80211_hdr_3addr))
810 return is_data_packet_for_us(ieee, hdr);
816 static void update_qual_rssi(struct zd_mac *mac,
817 const u8 *buffer, unsigned int length,
818 u8 qual_percent, u8 rssi_percent)
821 struct ieee80211_hdr_3addr *hdr;
824 hdr = (struct ieee80211_hdr_3addr *)buffer;
825 if (length < offsetof(struct ieee80211_hdr_3addr, addr3))
827 if (memcmp(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid, ETH_ALEN) != 0)
830 spin_lock_irqsave(&mac->lock, flags);
831 i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE;
832 mac->qual_buffer[i] = qual_percent;
833 mac->rssi_buffer[i] = rssi_percent;
835 spin_unlock_irqrestore(&mac->lock, flags);
838 static int fill_rx_stats(struct ieee80211_rx_stats *stats,
839 const struct rx_status **pstatus,
841 const u8 *buffer, unsigned int length)
843 const struct rx_status *status;
845 *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status));
846 if (status->frame_status & ZD_RX_ERROR) {
850 memset(stats, 0, sizeof(struct ieee80211_rx_stats));
851 stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN +
852 + sizeof(struct rx_status));
854 stats->freq = IEEE80211_24GHZ_BAND;
855 stats->received_channel = _zd_chip_get_channel(&mac->chip);
856 stats->rssi = zd_rx_strength_percent(status->signal_strength);
857 stats->signal = zd_rx_qual_percent(buffer,
858 length - sizeof(struct rx_status),
860 stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL;
861 stats->rate = zd_rx_rate(buffer, status);
863 stats->mask |= IEEE80211_STATMASK_RATE;
868 int zd_mac_rx(struct zd_mac *mac, const u8 *buffer, unsigned int length)
871 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
872 struct ieee80211_rx_stats stats;
873 const struct rx_status *status;
876 if (length < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN +
877 IEEE80211_FCS_LEN + sizeof(struct rx_status))
880 r = fill_rx_stats(&stats, &status, mac, buffer, length);
884 length -= ZD_PLCP_HEADER_SIZE+IEEE80211_FCS_LEN+
885 sizeof(struct rx_status);
886 buffer += ZD_PLCP_HEADER_SIZE;
888 update_qual_rssi(mac, buffer, length, stats.signal, stats.rssi);
890 r = filter_rx(ieee, buffer, length, &stats);
894 skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length);
897 if (ieee->iw_mode == IW_MODE_MONITOR)
898 fill_rt_header(skb_put(skb, sizeof(struct zd_rt_hdr)), mac,
900 memcpy(skb_put(skb, length), buffer, length);
902 r = ieee80211_rx(ieee, skb, &stats);
905 dev_kfree_skb_irq(skb);
910 static int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev,
913 return zd_mac_tx(zd_netdev_mac(netdev), txb, pri);
916 static void set_security(struct net_device *netdev,
917 struct ieee80211_security *sec)
919 struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);
920 struct ieee80211_security *secinfo = &ieee->sec;
923 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n");
925 for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
926 if (sec->flags & (1<<keyidx)) {
927 secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx];
928 secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx];
929 memcpy(secinfo->keys[keyidx], sec->keys[keyidx],
933 if (sec->flags & SEC_ACTIVE_KEY) {
934 secinfo->active_key = sec->active_key;
935 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
936 " .active_key = %d\n", sec->active_key);
938 if (sec->flags & SEC_UNICAST_GROUP) {
939 secinfo->unicast_uses_group = sec->unicast_uses_group;
940 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
941 " .unicast_uses_group = %d\n",
942 sec->unicast_uses_group);
944 if (sec->flags & SEC_LEVEL) {
945 secinfo->level = sec->level;
946 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
947 " .level = %d\n", sec->level);
949 if (sec->flags & SEC_ENABLED) {
950 secinfo->enabled = sec->enabled;
951 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
952 " .enabled = %d\n", sec->enabled);
954 if (sec->flags & SEC_ENCRYPT) {
955 secinfo->encrypt = sec->encrypt;
956 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
957 " .encrypt = %d\n", sec->encrypt);
959 if (sec->flags & SEC_AUTH_MODE) {
960 secinfo->auth_mode = sec->auth_mode;
961 dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)),
962 " .auth_mode = %d\n", sec->auth_mode);
966 static void ieee_init(struct ieee80211_device *ieee)
968 ieee->mode = IEEE_B | IEEE_G;
969 ieee->freq_band = IEEE80211_24GHZ_BAND;
970 ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION;
971 ieee->tx_headroom = sizeof(struct zd_ctrlset);
972 ieee->set_security = set_security;
973 ieee->hard_start_xmit = netdev_tx;
975 /* Software encryption/decryption for now */
976 ieee->host_build_iv = 0;
977 ieee->host_encrypt = 1;
978 ieee->host_decrypt = 1;
980 /* FIXME: default to managed mode, until ieee80211 and zd1211rw can
981 * correctly support AUTO */
982 ieee->iw_mode = IW_MODE_INFRA;
985 static void softmac_init(struct ieee80211softmac_device *sm)
987 sm->set_channel = set_channel;
990 struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev)
992 struct zd_mac *mac = zd_netdev_mac(ndev);
993 struct iw_statistics *iw_stats = &mac->iw_stats;
994 unsigned int i, count, qual_total, rssi_total;
996 memset(iw_stats, 0, sizeof(struct iw_statistics));
997 /* We are not setting the status, because ieee->state is not updated
998 * at all and this driver doesn't track authentication state.
1000 spin_lock_irq(&mac->lock);
1001 count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ?
1002 mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE;
1003 qual_total = rssi_total = 0;
1004 for (i = 0; i < count; i++) {
1005 qual_total += mac->qual_buffer[i];
1006 rssi_total += mac->rssi_buffer[i];
1008 spin_unlock_irq(&mac->lock);
1009 iw_stats->qual.updated = IW_QUAL_NOISE_INVALID;
1011 iw_stats->qual.qual = qual_total / count;
1012 iw_stats->qual.level = rssi_total / count;
1013 iw_stats->qual.updated |=
1014 IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED;
1016 iw_stats->qual.updated |=
1017 IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID;
1019 /* TODO: update counter */
1023 #define LINK_LED_WORK_DELAY HZ
1025 static void link_led_handler(void *p)
1027 struct zd_mac *mac = p;
1028 struct zd_chip *chip = &mac->chip;
1029 struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev);
1033 spin_lock_irq(&mac->lock);
1034 is_associated = sm->associnfo.associated != 0;
1035 spin_unlock_irq(&mac->lock);
1037 r = zd_chip_control_leds(chip,
1038 is_associated ? LED_ASSOCIATED : LED_SCANNING);
1040 dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
1042 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1043 LINK_LED_WORK_DELAY);
1046 static void housekeeping_init(struct zd_mac *mac)
1048 INIT_WORK(&mac->housekeeping.link_led_work, link_led_handler, mac);
1051 static void housekeeping_enable(struct zd_mac *mac)
1053 dev_dbg_f(zd_mac_dev(mac), "\n");
1054 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1058 static void housekeeping_disable(struct zd_mac *mac)
1060 dev_dbg_f(zd_mac_dev(mac), "\n");
1061 cancel_rearming_delayed_workqueue(zd_workqueue,
1062 &mac->housekeeping.link_led_work);
1063 zd_chip_control_leds(&mac->chip, LED_OFF);