1 /* ZD1211 USB-WLAN driver for Linux
3 * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
4 * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
5 * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net>
6 * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/usb.h>
26 #include <linux/jiffies.h>
27 #include <net/ieee80211_radiotap.h>
32 #include "zd_ieee80211.h"
35 /* This table contains the hardware specific values for the modulation rates. */
36 static const struct ieee80211_rate zd_rates[] = {
38 .val = ZD_CCK_RATE_1M,
39 .flags = IEEE80211_RATE_CCK },
41 .val = ZD_CCK_RATE_2M,
42 .val2 = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT,
43 .flags = IEEE80211_RATE_CCK_2 },
45 .val = ZD_CCK_RATE_5_5M,
46 .val2 = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT,
47 .flags = IEEE80211_RATE_CCK_2 },
49 .val = ZD_CCK_RATE_11M,
50 .val2 = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT,
51 .flags = IEEE80211_RATE_CCK_2 },
53 .val = ZD_OFDM_RATE_6M,
54 .flags = IEEE80211_RATE_OFDM },
56 .val = ZD_OFDM_RATE_9M,
57 .flags = IEEE80211_RATE_OFDM },
59 .val = ZD_OFDM_RATE_12M,
60 .flags = IEEE80211_RATE_OFDM },
62 .val = ZD_OFDM_RATE_18M,
63 .flags = IEEE80211_RATE_OFDM },
65 .val = ZD_OFDM_RATE_24M,
66 .flags = IEEE80211_RATE_OFDM },
68 .val = ZD_OFDM_RATE_36M,
69 .flags = IEEE80211_RATE_OFDM },
71 .val = ZD_OFDM_RATE_48M,
72 .flags = IEEE80211_RATE_OFDM },
74 .val = ZD_OFDM_RATE_54M,
75 .flags = IEEE80211_RATE_OFDM },
78 static const struct ieee80211_channel zd_channels[] = {
109 static void housekeeping_init(struct zd_mac *mac);
110 static void housekeeping_enable(struct zd_mac *mac);
111 static void housekeeping_disable(struct zd_mac *mac);
113 int zd_mac_preinit_hw(struct ieee80211_hw *hw)
117 struct zd_mac *mac = zd_hw_mac(hw);
119 r = zd_chip_read_mac_addr_fw(&mac->chip, addr);
123 SET_IEEE80211_PERM_ADDR(hw, addr);
128 int zd_mac_init_hw(struct ieee80211_hw *hw)
131 struct zd_mac *mac = zd_hw_mac(hw);
132 struct zd_chip *chip = &mac->chip;
133 u8 default_regdomain;
135 r = zd_chip_enable_int(chip);
138 r = zd_chip_init_hw(chip);
142 ZD_ASSERT(!irqs_disabled());
144 r = zd_read_regdomain(chip, &default_regdomain);
147 spin_lock_irq(&mac->lock);
148 mac->regdomain = mac->default_regdomain = default_regdomain;
149 spin_unlock_irq(&mac->lock);
151 /* We must inform the device that we are doing encryption/decryption in
152 * software at the moment. */
153 r = zd_set_encryption_type(chip, ENC_SNIFFER);
157 zd_geo_init(hw, mac->regdomain);
161 zd_chip_disable_int(chip);
166 void zd_mac_clear(struct zd_mac *mac)
168 flush_workqueue(zd_workqueue);
169 zd_chip_clear(&mac->chip);
170 ZD_ASSERT(!spin_is_locked(&mac->lock));
171 ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
174 static int set_rx_filter(struct zd_mac *mac)
177 u32 filter = STA_RX_FILTER;
179 spin_lock_irqsave(&mac->lock, flags);
181 filter |= RX_FILTER_CTRL;
182 spin_unlock_irqrestore(&mac->lock, flags);
184 return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter);
187 static int set_mc_hash(struct zd_mac *mac)
189 struct zd_mc_hash hash;
191 return zd_chip_set_multicast_hash(&mac->chip, &hash);
194 static int zd_op_start(struct ieee80211_hw *hw)
196 struct zd_mac *mac = zd_hw_mac(hw);
197 struct zd_chip *chip = &mac->chip;
198 struct zd_usb *usb = &chip->usb;
201 if (!usb->initialized) {
202 r = zd_usb_init_hw(usb);
207 r = zd_chip_enable_int(chip);
211 r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
214 r = set_rx_filter(mac);
217 r = set_mc_hash(mac);
220 r = zd_chip_switch_radio_on(chip);
223 r = zd_chip_enable_rxtx(chip);
226 r = zd_chip_enable_hwint(chip);
230 housekeeping_enable(mac);
233 zd_chip_disable_rxtx(chip);
235 zd_chip_switch_radio_off(chip);
237 zd_chip_disable_int(chip);
243 * clear_tx_skb_control_block - clears the control block of tx skbuffs
244 * @skb: a &struct sk_buff pointer
246 * This clears the control block of skbuff buffers, which were transmitted to
247 * the device. Notify that the function is not thread-safe, so prevent
250 static void clear_tx_skb_control_block(struct sk_buff *skb)
252 struct zd_tx_skb_control_block *cb =
253 (struct zd_tx_skb_control_block *)skb->cb;
260 * kfree_tx_skb - frees a tx skbuff
261 * @skb: a &struct sk_buff pointer
263 * Frees the tx skbuff. Frees also the allocated control structure in the
264 * control block if necessary.
266 static void kfree_tx_skb(struct sk_buff *skb)
268 clear_tx_skb_control_block(skb);
269 dev_kfree_skb_any(skb);
272 static void zd_op_stop(struct ieee80211_hw *hw)
274 struct zd_mac *mac = zd_hw_mac(hw);
275 struct zd_chip *chip = &mac->chip;
277 struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue;
279 /* The order here deliberately is a little different from the open()
280 * method, since we need to make sure there is no opportunity for RX
281 * frames to be processed by mac80211 after we have stopped it.
284 zd_chip_disable_rxtx(chip);
285 housekeeping_disable(mac);
286 flush_workqueue(zd_workqueue);
288 zd_chip_disable_hwint(chip);
289 zd_chip_switch_radio_off(chip);
290 zd_chip_disable_int(chip);
293 while ((skb = skb_dequeue(ack_wait_queue)))
298 * init_tx_skb_control_block - initializes skb control block
299 * @skb: a &sk_buff pointer
300 * @dev: pointer to the mac80221 device
301 * @control: mac80211 tx control applying for the frame in @skb
303 * Initializes the control block of the skbuff to be transmitted.
305 static int init_tx_skb_control_block(struct sk_buff *skb,
306 struct ieee80211_hw *hw,
307 struct ieee80211_tx_control *control)
309 struct zd_tx_skb_control_block *cb =
310 (struct zd_tx_skb_control_block *)skb->cb;
312 ZD_ASSERT(sizeof(*cb) <= sizeof(skb->cb));
313 memset(cb, 0, sizeof(*cb));
315 cb->control = kmalloc(sizeof(*control), GFP_ATOMIC);
316 if (cb->control == NULL)
318 memcpy(cb->control, control, sizeof(*control));
324 * tx_status - reports tx status of a packet if required
325 * @hw - a &struct ieee80211_hw pointer
327 * @status - the tx status of the packet without control information
328 * @success - True for successfull transmission of the frame
330 * This information calls ieee80211_tx_status_irqsafe() if required by the
331 * control information. It copies the control information into the status
334 * If no status information has been requested, the skb is freed.
336 static void tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
337 struct ieee80211_tx_status *status,
340 struct zd_tx_skb_control_block *cb = (struct zd_tx_skb_control_block *)
343 ZD_ASSERT(cb->control != NULL);
344 memcpy(&status->control, cb->control, sizeof(status->control));
346 status->excessive_retries = 1;
347 clear_tx_skb_control_block(skb);
348 ieee80211_tx_status_irqsafe(hw, skb, status);
352 * zd_mac_tx_failed - callback for failed frames
353 * @dev: the mac80211 wireless device
355 * This function is called if a frame couldn't be succesfully be
356 * transferred. The first frame from the tx queue, will be selected and
357 * reported as error to the upper layers.
359 void zd_mac_tx_failed(struct ieee80211_hw *hw)
361 struct sk_buff_head *q = &zd_hw_mac(hw)->ack_wait_queue;
363 struct ieee80211_tx_status status = {{0}};
365 skb = skb_dequeue(q);
368 tx_status(hw, skb, &status, 0);
372 * zd_mac_tx_to_dev - callback for USB layer
373 * @skb: a &sk_buff pointer
374 * @error: error value, 0 if transmission successful
376 * Informs the MAC layer that the frame has successfully transferred to the
377 * device. If an ACK is required and the transfer to the device has been
378 * successful, the packets are put on the @ack_wait_queue with
379 * the control set removed.
381 void zd_mac_tx_to_dev(struct sk_buff *skb, int error)
383 struct zd_tx_skb_control_block *cb =
384 (struct zd_tx_skb_control_block *)skb->cb;
385 struct ieee80211_hw *hw = cb->hw;
387 if (likely(cb->control)) {
388 skb_pull(skb, sizeof(struct zd_ctrlset));
389 if (unlikely(error ||
390 (cb->control->flags & IEEE80211_TXCTL_NO_ACK)))
392 struct ieee80211_tx_status status = {{0}};
393 tx_status(hw, skb, &status, !error);
395 struct sk_buff_head *q =
396 &zd_hw_mac(hw)->ack_wait_queue;
398 skb_queue_tail(q, skb);
399 while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS)
400 zd_mac_tx_failed(hw);
407 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
409 /* ZD_PURE_RATE() must be used to remove the modulation type flag of
410 * the zd-rate values.
412 static const u8 rate_divisor[] = {
413 [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1,
414 [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2,
415 /* Bits must be doubled. */
416 [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11,
417 [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11,
418 [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6,
419 [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9,
420 [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12,
421 [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18,
422 [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24,
423 [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36,
424 [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48,
425 [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54,
428 u32 bits = (u32)tx_length * 8;
431 divisor = rate_divisor[ZD_PURE_RATE(zd_rate)];
436 case ZD_CCK_RATE_5_5M:
437 bits = (2*bits) + 10; /* round up to the next integer */
439 case ZD_CCK_RATE_11M:
442 *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
443 if (0 < t && t <= 3) {
444 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
447 bits += 10; /* round up to the next integer */
454 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
455 struct ieee80211_hdr *header, u32 flags)
457 u16 fctl = le16_to_cpu(header->frame_control);
461 * - if backoff needed, enable bit 0
462 * - if burst (backoff not needed) disable bit 0
468 if (flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
469 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
472 if (is_multicast_ether_addr(header->addr1))
473 cs->control |= ZD_CS_MULTICAST;
476 if ((fctl & (IEEE80211_FCTL_FTYPE|IEEE80211_FCTL_STYPE)) ==
477 (IEEE80211_FTYPE_CTL|IEEE80211_STYPE_PSPOLL))
478 cs->control |= ZD_CS_PS_POLL_FRAME;
480 if (flags & IEEE80211_TXCTL_USE_RTS_CTS)
481 cs->control |= ZD_CS_RTS;
483 if (flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
484 cs->control |= ZD_CS_SELF_CTS;
486 /* FIXME: Management frame? */
489 static int fill_ctrlset(struct zd_mac *mac,
491 struct ieee80211_tx_control *control)
494 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
495 unsigned int frag_len = skb->len + FCS_LEN;
496 unsigned int packet_length;
497 struct zd_ctrlset *cs = (struct zd_ctrlset *)
498 skb_push(skb, sizeof(struct zd_ctrlset));
500 ZD_ASSERT(frag_len <= 0xffff);
502 cs->modulation = control->tx_rate;
504 cs->tx_length = cpu_to_le16(frag_len);
506 cs_set_control(mac, cs, hdr, control->flags);
508 packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
509 ZD_ASSERT(packet_length <= 0xffff);
510 /* ZD1211B: Computing the length difference this way, gives us
511 * flexibility to compute the packet length.
513 cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ?
514 packet_length - frag_len : packet_length);
518 * - transmit frame length in microseconds
519 * - seems to be derived from frame length
520 * - see Cal_Us_Service() in zdinlinef.h
521 * - if macp->bTxBurstEnable is enabled, then multiply by 4
522 * - bTxBurstEnable is never set in the vendor driver
525 * - "for PLCP configuration"
526 * - always 0 except in some situations at 802.11b 11M
527 * - see line 53 of zdinlinef.h
530 r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation),
531 le16_to_cpu(cs->tx_length));
534 cs->current_length = cpu_to_le16(r);
535 cs->next_frame_length = 0;
541 * zd_op_tx - transmits a network frame to the device
543 * @dev: mac80211 hardware device
544 * @skb: socket buffer
545 * @control: the control structure
547 * This function transmit an IEEE 802.11 network frame to the device. The
548 * control block of the skbuff will be initialized. If necessary the incoming
549 * mac80211 queues will be stopped.
551 static int zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
552 struct ieee80211_tx_control *control)
554 struct zd_mac *mac = zd_hw_mac(hw);
557 r = fill_ctrlset(mac, skb, control);
561 r = init_tx_skb_control_block(skb, hw, control);
564 r = zd_usb_tx(&mac->chip.usb, skb);
566 clear_tx_skb_control_block(skb);
573 * filter_ack - filters incoming packets for acknowledgements
574 * @dev: the mac80211 device
575 * @rx_hdr: received header
576 * @stats: the status for the received packet
578 * This functions looks for ACK packets and tries to match them with the
579 * frames in the tx queue. If a match is found the frame will be dequeued and
580 * the upper layers is informed about the successful transmission. If
581 * mac80211 queues have been stopped and the number of frames still to be
582 * transmitted is low the queues will be opened again.
584 * Returns 1 if the frame was an ACK, 0 if it was ignored.
586 static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr,
587 struct ieee80211_rx_status *stats)
589 u16 fc = le16_to_cpu(rx_hdr->frame_control);
591 struct sk_buff_head *q;
594 if ((fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) !=
595 (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK))
598 q = &zd_hw_mac(hw)->ack_wait_queue;
599 spin_lock_irqsave(&q->lock, flags);
600 for (skb = q->next; skb != (struct sk_buff *)q; skb = skb->next) {
601 struct ieee80211_hdr *tx_hdr;
603 tx_hdr = (struct ieee80211_hdr *)skb->data;
604 if (likely(!compare_ether_addr(tx_hdr->addr2, rx_hdr->addr1)))
606 struct ieee80211_tx_status status = {{0}};
607 status.flags = IEEE80211_TX_STATUS_ACK;
608 status.ack_signal = stats->ssi;
609 __skb_unlink(skb, q);
610 tx_status(hw, skb, &status, 1);
615 spin_unlock_irqrestore(&q->lock, flags);
619 int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length)
621 struct zd_mac *mac = zd_hw_mac(hw);
622 struct ieee80211_rx_status stats;
623 const struct rx_status *status;
627 if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ +
628 FCS_LEN + sizeof(struct rx_status))
631 memset(&stats, 0, sizeof(stats));
633 /* Note about pass_failed_fcs and pass_ctrl access below:
634 * mac locking intentionally omitted here, as this is the only unlocked
635 * reader and the only writer is configure_filter. Plus, if there were
636 * any races accessing these variables, it wouldn't really matter.
637 * If mac80211 ever provides a way for us to access filter flags
638 * from outside configure_filter, we could improve on this. Also, this
639 * situation may change once we implement some kind of DMA-into-skb
642 /* Caller has to ensure that length >= sizeof(struct rx_status). */
643 status = (struct rx_status *)
644 (buffer + (length - sizeof(struct rx_status)));
645 if (status->frame_status & ZD_RX_ERROR) {
646 if (mac->pass_failed_fcs &&
647 (status->frame_status & ZD_RX_CRC32_ERROR)) {
648 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
655 stats.channel = _zd_chip_get_channel(&mac->chip);
656 stats.freq = zd_channels[stats.channel - 1].freq;
657 stats.phymode = MODE_IEEE80211G;
658 stats.ssi = status->signal_strength;
659 stats.signal = zd_rx_qual_percent(buffer,
660 length - sizeof(struct rx_status),
662 stats.rate = zd_rx_rate(buffer, status);
664 length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status);
665 buffer += ZD_PLCP_HEADER_SIZE;
667 /* Except for bad frames, filter each frame to see if it is an ACK, in
668 * which case our internal TX tracking is updated. Normally we then
669 * bail here as there's no need to pass ACKs on up to the stack, but
670 * there is also the case where the stack has requested us to pass
671 * control frames on up (pass_ctrl) which we must consider. */
673 filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats)
677 skb = dev_alloc_skb(length);
680 memcpy(skb_put(skb, length), buffer, length);
682 ieee80211_rx_irqsafe(hw, skb, &stats);
686 static int zd_op_add_interface(struct ieee80211_hw *hw,
687 struct ieee80211_if_init_conf *conf)
689 struct zd_mac *mac = zd_hw_mac(hw);
691 /* using IEEE80211_IF_TYPE_INVALID to indicate no mode selected */
692 if (mac->type != IEEE80211_IF_TYPE_INVALID)
695 switch (conf->type) {
696 case IEEE80211_IF_TYPE_MNTR:
697 case IEEE80211_IF_TYPE_STA:
698 mac->type = conf->type;
704 return zd_write_mac_addr(&mac->chip, conf->mac_addr);
707 static void zd_op_remove_interface(struct ieee80211_hw *hw,
708 struct ieee80211_if_init_conf *conf)
710 struct zd_mac *mac = zd_hw_mac(hw);
711 mac->type = IEEE80211_IF_TYPE_INVALID;
712 zd_write_mac_addr(&mac->chip, NULL);
715 static int zd_op_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
717 struct zd_mac *mac = zd_hw_mac(hw);
718 return zd_chip_set_channel(&mac->chip, conf->channel);
721 static int zd_op_config_interface(struct ieee80211_hw *hw, int if_id,
722 struct ieee80211_if_conf *conf)
724 struct zd_mac *mac = zd_hw_mac(hw);
726 spin_lock_irq(&mac->lock);
727 mac->associated = is_valid_ether_addr(conf->bssid);
728 spin_unlock_irq(&mac->lock);
730 /* TODO: do hardware bssid filtering */
734 static void set_multicast_hash_handler(struct work_struct *work)
737 container_of(work, struct zd_mac, set_multicast_hash_work);
738 struct zd_mc_hash hash;
740 spin_lock_irq(&mac->lock);
741 hash = mac->multicast_hash;
742 spin_unlock_irq(&mac->lock);
744 zd_chip_set_multicast_hash(&mac->chip, &hash);
747 static void set_rx_filter_handler(struct work_struct *work)
750 container_of(work, struct zd_mac, set_rx_filter_work);
753 dev_dbg_f(zd_mac_dev(mac), "\n");
754 r = set_rx_filter(mac);
756 dev_err(zd_mac_dev(mac), "set_rx_filter_handler error %d\n", r);
759 #define SUPPORTED_FIF_FLAGS \
760 (FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \
762 static void zd_op_configure_filter(struct ieee80211_hw *hw,
763 unsigned int changed_flags,
764 unsigned int *new_flags,
765 int mc_count, struct dev_mc_list *mclist)
767 struct zd_mc_hash hash;
768 struct zd_mac *mac = zd_hw_mac(hw);
772 /* Only deal with supported flags */
773 changed_flags &= SUPPORTED_FIF_FLAGS;
774 *new_flags &= SUPPORTED_FIF_FLAGS;
776 /* changed_flags is always populated but this driver
777 * doesn't support all FIF flags so its possible we don't
778 * need to do anything */
782 if (*new_flags & (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)) {
783 zd_mc_add_all(&hash);
785 DECLARE_MAC_BUF(macbuf);
788 for (i = 0; i < mc_count; i++) {
791 dev_dbg_f(zd_mac_dev(mac), "mc addr %s\n",
792 print_mac(macbuf, mclist->dmi_addr));
793 zd_mc_add_addr(&hash, mclist->dmi_addr);
794 mclist = mclist->next;
798 spin_lock_irqsave(&mac->lock, flags);
799 mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL);
800 mac->pass_ctrl = !!(*new_flags & FIF_CONTROL);
801 mac->multicast_hash = hash;
802 spin_unlock_irqrestore(&mac->lock, flags);
803 queue_work(zd_workqueue, &mac->set_multicast_hash_work);
805 if (changed_flags & FIF_CONTROL)
806 queue_work(zd_workqueue, &mac->set_rx_filter_work);
808 /* no handling required for FIF_OTHER_BSS as we don't currently
809 * do BSSID filtering */
810 /* FIXME: in future it would be nice to enable the probe response
811 * filter (so that the driver doesn't see them) until
812 * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd
813 * have to schedule work to enable prbresp reception, which might
814 * happen too late. For now we'll just listen and forward them all the
818 static void set_rts_cts_work(struct work_struct *work)
821 container_of(work, struct zd_mac, set_rts_cts_work);
823 unsigned int short_preamble;
825 mutex_lock(&mac->chip.mutex);
827 spin_lock_irqsave(&mac->lock, flags);
828 mac->updating_rts_rate = 0;
829 short_preamble = mac->short_preamble;
830 spin_unlock_irqrestore(&mac->lock, flags);
832 zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble);
833 mutex_unlock(&mac->chip.mutex);
836 static void zd_op_erp_ie_changed(struct ieee80211_hw *hw, u8 changes,
837 int cts_protection, int preamble)
839 struct zd_mac *mac = zd_hw_mac(hw);
842 dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
844 if (changes & IEEE80211_ERP_CHANGE_PREAMBLE) {
845 spin_lock_irqsave(&mac->lock, flags);
846 mac->short_preamble = !preamble;
847 if (!mac->updating_rts_rate) {
848 mac->updating_rts_rate = 1;
849 /* FIXME: should disable TX here, until work has
850 * completed and RTS_CTS reg is updated */
851 queue_work(zd_workqueue, &mac->set_rts_cts_work);
853 spin_unlock_irqrestore(&mac->lock, flags);
857 static const struct ieee80211_ops zd_ops = {
859 .start = zd_op_start,
861 .add_interface = zd_op_add_interface,
862 .remove_interface = zd_op_remove_interface,
863 .config = zd_op_config,
864 .config_interface = zd_op_config_interface,
865 .configure_filter = zd_op_configure_filter,
866 .erp_ie_changed = zd_op_erp_ie_changed,
869 struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf)
872 struct ieee80211_hw *hw;
875 hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops);
877 dev_dbg_f(&intf->dev, "out of memory\n");
883 memset(mac, 0, sizeof(*mac));
884 spin_lock_init(&mac->lock);
887 mac->type = IEEE80211_IF_TYPE_INVALID;
889 memcpy(mac->channels, zd_channels, sizeof(zd_channels));
890 memcpy(mac->rates, zd_rates, sizeof(zd_rates));
891 mac->modes[0].mode = MODE_IEEE80211G;
892 mac->modes[0].num_rates = ARRAY_SIZE(zd_rates);
893 mac->modes[0].rates = mac->rates;
894 mac->modes[0].num_channels = ARRAY_SIZE(zd_channels);
895 mac->modes[0].channels = mac->channels;
896 mac->modes[1].mode = MODE_IEEE80211B;
897 mac->modes[1].num_rates = 4;
898 mac->modes[1].rates = mac->rates;
899 mac->modes[1].num_channels = ARRAY_SIZE(zd_channels);
900 mac->modes[1].channels = mac->channels;
902 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
903 IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED;
905 hw->max_signal = 100;
908 hw->extra_tx_headroom = sizeof(struct zd_ctrlset);
910 skb_queue_head_init(&mac->ack_wait_queue);
912 for (i = 0; i < 2; i++) {
913 if (ieee80211_register_hwmode(hw, &mac->modes[i])) {
914 dev_dbg_f(&intf->dev, "cannot register hwmode\n");
915 ieee80211_free_hw(hw);
920 zd_chip_init(&mac->chip, hw, intf);
921 housekeeping_init(mac);
922 INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler);
923 INIT_WORK(&mac->set_rts_cts_work, set_rts_cts_work);
924 INIT_WORK(&mac->set_rx_filter_work, set_rx_filter_handler);
926 SET_IEEE80211_DEV(hw, &intf->dev);
930 #define LINK_LED_WORK_DELAY HZ
932 static void link_led_handler(struct work_struct *work)
935 container_of(work, struct zd_mac, housekeeping.link_led_work.work);
936 struct zd_chip *chip = &mac->chip;
940 spin_lock_irq(&mac->lock);
941 is_associated = mac->associated;
942 spin_unlock_irq(&mac->lock);
944 r = zd_chip_control_leds(chip,
945 is_associated ? LED_ASSOCIATED : LED_SCANNING);
947 dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
949 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
950 LINK_LED_WORK_DELAY);
953 static void housekeeping_init(struct zd_mac *mac)
955 INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
958 static void housekeeping_enable(struct zd_mac *mac)
960 dev_dbg_f(zd_mac_dev(mac), "\n");
961 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
965 static void housekeeping_disable(struct zd_mac *mac)
967 dev_dbg_f(zd_mac_dev(mac), "\n");
968 cancel_rearming_delayed_workqueue(zd_workqueue,
969 &mac->housekeeping.link_led_work);
970 zd_chip_control_leds(&mac->chip, LED_OFF);