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 .hw_value = ZD_CCK_RATE_1M, },
40 .hw_value = ZD_CCK_RATE_2M,
41 .hw_value_short = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT,
42 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
44 .hw_value = ZD_CCK_RATE_5_5M,
45 .hw_value_short = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT,
46 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
48 .hw_value = ZD_CCK_RATE_11M,
49 .hw_value_short = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT,
50 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
52 .hw_value = ZD_OFDM_RATE_6M,
55 .hw_value = ZD_OFDM_RATE_9M,
58 .hw_value = ZD_OFDM_RATE_12M,
61 .hw_value = ZD_OFDM_RATE_18M,
64 .hw_value = ZD_OFDM_RATE_24M,
67 .hw_value = ZD_OFDM_RATE_36M,
70 .hw_value = ZD_OFDM_RATE_48M,
73 .hw_value = ZD_OFDM_RATE_54M,
77 static const struct ieee80211_channel zd_channels[] = {
78 { .center_freq = 2412, .hw_value = 1 },
79 { .center_freq = 2417, .hw_value = 2 },
80 { .center_freq = 2422, .hw_value = 3 },
81 { .center_freq = 2427, .hw_value = 4 },
82 { .center_freq = 2432, .hw_value = 5 },
83 { .center_freq = 2437, .hw_value = 6 },
84 { .center_freq = 2442, .hw_value = 7 },
85 { .center_freq = 2447, .hw_value = 8 },
86 { .center_freq = 2452, .hw_value = 9 },
87 { .center_freq = 2457, .hw_value = 10 },
88 { .center_freq = 2462, .hw_value = 11 },
89 { .center_freq = 2467, .hw_value = 12 },
90 { .center_freq = 2472, .hw_value = 13 },
91 { .center_freq = 2484, .hw_value = 14 },
94 static void housekeeping_init(struct zd_mac *mac);
95 static void housekeeping_enable(struct zd_mac *mac);
96 static void housekeeping_disable(struct zd_mac *mac);
98 int zd_mac_preinit_hw(struct ieee80211_hw *hw)
102 struct zd_mac *mac = zd_hw_mac(hw);
104 r = zd_chip_read_mac_addr_fw(&mac->chip, addr);
108 SET_IEEE80211_PERM_ADDR(hw, addr);
113 int zd_mac_init_hw(struct ieee80211_hw *hw)
116 struct zd_mac *mac = zd_hw_mac(hw);
117 struct zd_chip *chip = &mac->chip;
118 u8 default_regdomain;
120 r = zd_chip_enable_int(chip);
123 r = zd_chip_init_hw(chip);
127 ZD_ASSERT(!irqs_disabled());
129 r = zd_read_regdomain(chip, &default_regdomain);
132 spin_lock_irq(&mac->lock);
133 mac->regdomain = mac->default_regdomain = default_regdomain;
134 spin_unlock_irq(&mac->lock);
136 /* We must inform the device that we are doing encryption/decryption in
137 * software at the moment. */
138 r = zd_set_encryption_type(chip, ENC_SNIFFER);
142 zd_geo_init(hw, mac->regdomain);
146 zd_chip_disable_int(chip);
151 void zd_mac_clear(struct zd_mac *mac)
153 flush_workqueue(zd_workqueue);
154 zd_chip_clear(&mac->chip);
155 ZD_ASSERT(!spin_is_locked(&mac->lock));
156 ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
159 static int set_rx_filter(struct zd_mac *mac)
162 u32 filter = STA_RX_FILTER;
164 spin_lock_irqsave(&mac->lock, flags);
166 filter |= RX_FILTER_CTRL;
167 spin_unlock_irqrestore(&mac->lock, flags);
169 return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter);
172 static int set_mc_hash(struct zd_mac *mac)
174 struct zd_mc_hash hash;
176 return zd_chip_set_multicast_hash(&mac->chip, &hash);
179 static int zd_op_start(struct ieee80211_hw *hw)
181 struct zd_mac *mac = zd_hw_mac(hw);
182 struct zd_chip *chip = &mac->chip;
183 struct zd_usb *usb = &chip->usb;
186 if (!usb->initialized) {
187 r = zd_usb_init_hw(usb);
192 r = zd_chip_enable_int(chip);
196 r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
199 r = set_rx_filter(mac);
202 r = set_mc_hash(mac);
205 r = zd_chip_switch_radio_on(chip);
208 r = zd_chip_enable_rxtx(chip);
211 r = zd_chip_enable_hwint(chip);
215 housekeeping_enable(mac);
218 zd_chip_disable_rxtx(chip);
220 zd_chip_switch_radio_off(chip);
222 zd_chip_disable_int(chip);
228 * clear_tx_skb_control_block - clears the control block of tx skbuffs
229 * @skb: a &struct sk_buff pointer
231 * This clears the control block of skbuff buffers, which were transmitted to
232 * the device. Notify that the function is not thread-safe, so prevent
235 static void clear_tx_skb_control_block(struct sk_buff *skb)
237 struct zd_tx_skb_control_block *cb =
238 (struct zd_tx_skb_control_block *)skb->cb;
245 * kfree_tx_skb - frees a tx skbuff
246 * @skb: a &struct sk_buff pointer
248 * Frees the tx skbuff. Frees also the allocated control structure in the
249 * control block if necessary.
251 static void kfree_tx_skb(struct sk_buff *skb)
253 clear_tx_skb_control_block(skb);
254 dev_kfree_skb_any(skb);
257 static void zd_op_stop(struct ieee80211_hw *hw)
259 struct zd_mac *mac = zd_hw_mac(hw);
260 struct zd_chip *chip = &mac->chip;
262 struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue;
264 /* The order here deliberately is a little different from the open()
265 * method, since we need to make sure there is no opportunity for RX
266 * frames to be processed by mac80211 after we have stopped it.
269 zd_chip_disable_rxtx(chip);
270 housekeeping_disable(mac);
271 flush_workqueue(zd_workqueue);
273 zd_chip_disable_hwint(chip);
274 zd_chip_switch_radio_off(chip);
275 zd_chip_disable_int(chip);
278 while ((skb = skb_dequeue(ack_wait_queue)))
283 * init_tx_skb_control_block - initializes skb control block
284 * @skb: a &sk_buff pointer
285 * @dev: pointer to the mac80221 device
286 * @control: mac80211 tx control applying for the frame in @skb
288 * Initializes the control block of the skbuff to be transmitted.
290 static int init_tx_skb_control_block(struct sk_buff *skb,
291 struct ieee80211_hw *hw,
292 struct ieee80211_tx_control *control)
294 struct zd_tx_skb_control_block *cb =
295 (struct zd_tx_skb_control_block *)skb->cb;
297 ZD_ASSERT(sizeof(*cb) <= sizeof(skb->cb));
298 memset(cb, 0, sizeof(*cb));
300 cb->control = kmalloc(sizeof(*control), GFP_ATOMIC);
301 if (cb->control == NULL)
303 memcpy(cb->control, control, sizeof(*control));
309 * tx_status - reports tx status of a packet if required
310 * @hw - a &struct ieee80211_hw pointer
312 * @status - the tx status of the packet without control information
313 * @success - True for successfull transmission of the frame
315 * This information calls ieee80211_tx_status_irqsafe() if required by the
316 * control information. It copies the control information into the status
319 * If no status information has been requested, the skb is freed.
321 static void tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
322 struct ieee80211_tx_status *status,
325 struct zd_tx_skb_control_block *cb = (struct zd_tx_skb_control_block *)
328 ZD_ASSERT(cb->control != NULL);
329 memcpy(&status->control, cb->control, sizeof(status->control));
331 status->excessive_retries = 1;
332 clear_tx_skb_control_block(skb);
333 ieee80211_tx_status_irqsafe(hw, skb, status);
337 * zd_mac_tx_failed - callback for failed frames
338 * @dev: the mac80211 wireless device
340 * This function is called if a frame couldn't be succesfully be
341 * transferred. The first frame from the tx queue, will be selected and
342 * reported as error to the upper layers.
344 void zd_mac_tx_failed(struct ieee80211_hw *hw)
346 struct sk_buff_head *q = &zd_hw_mac(hw)->ack_wait_queue;
348 struct ieee80211_tx_status status;
350 skb = skb_dequeue(q);
354 memset(&status, 0, sizeof(status));
356 tx_status(hw, skb, &status, 0);
360 * zd_mac_tx_to_dev - callback for USB layer
361 * @skb: a &sk_buff pointer
362 * @error: error value, 0 if transmission successful
364 * Informs the MAC layer that the frame has successfully transferred to the
365 * device. If an ACK is required and the transfer to the device has been
366 * successful, the packets are put on the @ack_wait_queue with
367 * the control set removed.
369 void zd_mac_tx_to_dev(struct sk_buff *skb, int error)
371 struct zd_tx_skb_control_block *cb =
372 (struct zd_tx_skb_control_block *)skb->cb;
373 struct ieee80211_hw *hw = cb->hw;
375 if (likely(cb->control)) {
376 skb_pull(skb, sizeof(struct zd_ctrlset));
377 if (unlikely(error ||
378 (cb->control->flags & IEEE80211_TXCTL_NO_ACK)))
380 struct ieee80211_tx_status status;
381 memset(&status, 0, sizeof(status));
382 tx_status(hw, skb, &status, !error);
384 struct sk_buff_head *q =
385 &zd_hw_mac(hw)->ack_wait_queue;
387 skb_queue_tail(q, skb);
388 while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS)
389 zd_mac_tx_failed(hw);
396 static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
398 /* ZD_PURE_RATE() must be used to remove the modulation type flag of
399 * the zd-rate values.
401 static const u8 rate_divisor[] = {
402 [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1,
403 [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2,
404 /* Bits must be doubled. */
405 [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11,
406 [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11,
407 [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6,
408 [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9,
409 [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12,
410 [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18,
411 [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24,
412 [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36,
413 [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48,
414 [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54,
417 u32 bits = (u32)tx_length * 8;
420 divisor = rate_divisor[ZD_PURE_RATE(zd_rate)];
425 case ZD_CCK_RATE_5_5M:
426 bits = (2*bits) + 10; /* round up to the next integer */
428 case ZD_CCK_RATE_11M:
431 *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION;
432 if (0 < t && t <= 3) {
433 *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION;
436 bits += 10; /* round up to the next integer */
443 static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
444 struct ieee80211_hdr *header, u32 flags)
446 u16 fctl = le16_to_cpu(header->frame_control);
450 * - if backoff needed, enable bit 0
451 * - if burst (backoff not needed) disable bit 0
457 if (flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
458 cs->control |= ZD_CS_NEED_RANDOM_BACKOFF;
461 if (is_multicast_ether_addr(header->addr1))
462 cs->control |= ZD_CS_MULTICAST;
465 if ((fctl & (IEEE80211_FCTL_FTYPE|IEEE80211_FCTL_STYPE)) ==
466 (IEEE80211_FTYPE_CTL|IEEE80211_STYPE_PSPOLL))
467 cs->control |= ZD_CS_PS_POLL_FRAME;
469 if (flags & IEEE80211_TXCTL_USE_RTS_CTS)
470 cs->control |= ZD_CS_RTS;
472 if (flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
473 cs->control |= ZD_CS_SELF_CTS;
475 /* FIXME: Management frame? */
478 void zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon)
480 struct zd_mac *mac = zd_hw_mac(hw);
482 /* 4 more bytes for tail CRC */
483 u32 full_len = beacon->len + 4;
484 zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 0);
485 zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp);
487 zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp);
488 if ((++j % 100) == 0) {
489 printk(KERN_ERR "CR_BCN_FIFO_SEMAPHORE not ready\n");
491 printk(KERN_ERR "Giving up beacon config.\n");
498 zd_iowrite32(&mac->chip, CR_BCN_FIFO, full_len - 1);
499 if (zd_chip_is_zd1211b(&mac->chip))
500 zd_iowrite32(&mac->chip, CR_BCN_LENGTH, full_len - 1);
502 for (j = 0 ; j < beacon->len; j++)
503 zd_iowrite32(&mac->chip, CR_BCN_FIFO,
504 *((u8 *)(beacon->data + j)));
506 for (j = 0; j < 4; j++)
507 zd_iowrite32(&mac->chip, CR_BCN_FIFO, 0x0);
509 zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 1);
510 /* 802.11b/g 2.4G CCK 1Mb
511 * 802.11a, not yet implemented, uses different values (see GPL vendor
514 zd_iowrite32(&mac->chip, CR_BCN_PLCP_CFG, 0x00000400 |
518 static int fill_ctrlset(struct zd_mac *mac,
520 struct ieee80211_tx_control *control)
523 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
524 unsigned int frag_len = skb->len + FCS_LEN;
525 unsigned int packet_length;
526 struct zd_ctrlset *cs = (struct zd_ctrlset *)
527 skb_push(skb, sizeof(struct zd_ctrlset));
529 ZD_ASSERT(frag_len <= 0xffff);
531 cs->modulation = control->tx_rate->hw_value;
532 if (control->flags & IEEE80211_TXCTL_SHORT_PREAMBLE)
533 cs->modulation = control->tx_rate->hw_value_short;
535 cs->tx_length = cpu_to_le16(frag_len);
537 cs_set_control(mac, cs, hdr, control->flags);
539 packet_length = frag_len + sizeof(struct zd_ctrlset) + 10;
540 ZD_ASSERT(packet_length <= 0xffff);
541 /* ZD1211B: Computing the length difference this way, gives us
542 * flexibility to compute the packet length.
544 cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ?
545 packet_length - frag_len : packet_length);
549 * - transmit frame length in microseconds
550 * - seems to be derived from frame length
551 * - see Cal_Us_Service() in zdinlinef.h
552 * - if macp->bTxBurstEnable is enabled, then multiply by 4
553 * - bTxBurstEnable is never set in the vendor driver
556 * - "for PLCP configuration"
557 * - always 0 except in some situations at 802.11b 11M
558 * - see line 53 of zdinlinef.h
561 r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation),
562 le16_to_cpu(cs->tx_length));
565 cs->current_length = cpu_to_le16(r);
566 cs->next_frame_length = 0;
572 * zd_op_tx - transmits a network frame to the device
574 * @dev: mac80211 hardware device
575 * @skb: socket buffer
576 * @control: the control structure
578 * This function transmit an IEEE 802.11 network frame to the device. The
579 * control block of the skbuff will be initialized. If necessary the incoming
580 * mac80211 queues will be stopped.
582 static int zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
583 struct ieee80211_tx_control *control)
585 struct zd_mac *mac = zd_hw_mac(hw);
588 r = fill_ctrlset(mac, skb, control);
592 r = init_tx_skb_control_block(skb, hw, control);
595 r = zd_usb_tx(&mac->chip.usb, skb);
597 clear_tx_skb_control_block(skb);
604 * filter_ack - filters incoming packets for acknowledgements
605 * @dev: the mac80211 device
606 * @rx_hdr: received header
607 * @stats: the status for the received packet
609 * This functions looks for ACK packets and tries to match them with the
610 * frames in the tx queue. If a match is found the frame will be dequeued and
611 * the upper layers is informed about the successful transmission. If
612 * mac80211 queues have been stopped and the number of frames still to be
613 * transmitted is low the queues will be opened again.
615 * Returns 1 if the frame was an ACK, 0 if it was ignored.
617 static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr,
618 struct ieee80211_rx_status *stats)
620 u16 fc = le16_to_cpu(rx_hdr->frame_control);
622 struct sk_buff_head *q;
625 if ((fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) !=
626 (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK))
629 q = &zd_hw_mac(hw)->ack_wait_queue;
630 spin_lock_irqsave(&q->lock, flags);
631 for (skb = q->next; skb != (struct sk_buff *)q; skb = skb->next) {
632 struct ieee80211_hdr *tx_hdr;
634 tx_hdr = (struct ieee80211_hdr *)skb->data;
635 if (likely(!compare_ether_addr(tx_hdr->addr2, rx_hdr->addr1)))
637 struct ieee80211_tx_status status;
639 memset(&status, 0, sizeof(status));
640 status.flags = IEEE80211_TX_STATUS_ACK;
641 status.ack_signal = stats->ssi;
642 __skb_unlink(skb, q);
643 tx_status(hw, skb, &status, 1);
648 spin_unlock_irqrestore(&q->lock, flags);
652 int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length)
654 struct zd_mac *mac = zd_hw_mac(hw);
655 struct ieee80211_rx_status stats;
656 const struct rx_status *status;
660 bool is_qos, is_4addr, need_padding;
664 if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ +
665 FCS_LEN + sizeof(struct rx_status))
668 memset(&stats, 0, sizeof(stats));
670 /* Note about pass_failed_fcs and pass_ctrl access below:
671 * mac locking intentionally omitted here, as this is the only unlocked
672 * reader and the only writer is configure_filter. Plus, if there were
673 * any races accessing these variables, it wouldn't really matter.
674 * If mac80211 ever provides a way for us to access filter flags
675 * from outside configure_filter, we could improve on this. Also, this
676 * situation may change once we implement some kind of DMA-into-skb
679 /* Caller has to ensure that length >= sizeof(struct rx_status). */
680 status = (struct rx_status *)
681 (buffer + (length - sizeof(struct rx_status)));
682 if (status->frame_status & ZD_RX_ERROR) {
683 if (mac->pass_failed_fcs &&
684 (status->frame_status & ZD_RX_CRC32_ERROR)) {
685 stats.flag |= RX_FLAG_FAILED_FCS_CRC;
692 stats.freq = zd_channels[_zd_chip_get_channel(&mac->chip) - 1].center_freq;
693 stats.band = IEEE80211_BAND_2GHZ;
694 stats.ssi = status->signal_strength;
695 stats.signal = zd_rx_qual_percent(buffer,
696 length - sizeof(struct rx_status),
699 rate = zd_rx_rate(buffer, status);
701 /* todo: return index in the big switches in zd_rx_rate instead */
702 for (i = 0; i < mac->band.n_bitrates; i++)
703 if (rate == mac->band.bitrates[i].hw_value)
706 length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status);
707 buffer += ZD_PLCP_HEADER_SIZE;
709 /* Except for bad frames, filter each frame to see if it is an ACK, in
710 * which case our internal TX tracking is updated. Normally we then
711 * bail here as there's no need to pass ACKs on up to the stack, but
712 * there is also the case where the stack has requested us to pass
713 * control frames on up (pass_ctrl) which we must consider. */
715 filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats)
719 fc = le16_to_cpu(*((__le16 *) buffer));
721 is_qos = ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
722 ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_QOS_DATA);
723 is_4addr = (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
724 (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS);
725 need_padding = is_qos ^ is_4addr;
727 skb = dev_alloc_skb(length + (need_padding ? 2 : 0));
731 /* Make sure the the payload data is 4 byte aligned. */
735 memcpy(skb_put(skb, length), buffer, length);
737 ieee80211_rx_irqsafe(hw, skb, &stats);
741 static int zd_op_add_interface(struct ieee80211_hw *hw,
742 struct ieee80211_if_init_conf *conf)
744 struct zd_mac *mac = zd_hw_mac(hw);
746 /* using IEEE80211_IF_TYPE_INVALID to indicate no mode selected */
747 if (mac->type != IEEE80211_IF_TYPE_INVALID)
750 switch (conf->type) {
751 case IEEE80211_IF_TYPE_MNTR:
752 case IEEE80211_IF_TYPE_MESH_POINT:
753 case IEEE80211_IF_TYPE_STA:
754 mac->type = conf->type;
760 return zd_write_mac_addr(&mac->chip, conf->mac_addr);
763 static void zd_op_remove_interface(struct ieee80211_hw *hw,
764 struct ieee80211_if_init_conf *conf)
766 struct zd_mac *mac = zd_hw_mac(hw);
767 mac->type = IEEE80211_IF_TYPE_INVALID;
768 zd_write_mac_addr(&mac->chip, NULL);
771 static int zd_op_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
773 struct zd_mac *mac = zd_hw_mac(hw);
774 return zd_chip_set_channel(&mac->chip, conf->channel->hw_value);
777 static int zd_op_config_interface(struct ieee80211_hw *hw,
778 struct ieee80211_vif *vif,
779 struct ieee80211_if_conf *conf)
781 struct zd_mac *mac = zd_hw_mac(hw);
784 if (mac->type == IEEE80211_IF_TYPE_MESH_POINT) {
787 zd_mac_config_beacon(hw, conf->beacon);
788 kfree_skb(conf->beacon);
789 zd_set_beacon_interval(&mac->chip, BCN_MODE_IBSS |
790 hw->conf.beacon_int);
793 associated = is_valid_ether_addr(conf->bssid);
795 spin_lock_irq(&mac->lock);
796 mac->associated = associated;
797 spin_unlock_irq(&mac->lock);
799 /* TODO: do hardware bssid filtering */
803 void zd_process_intr(struct work_struct *work)
806 struct zd_mac *mac = container_of(work, struct zd_mac, process_intr);
808 int_status = le16_to_cpu(*(u16 *)(mac->intr_buffer+4));
809 if (int_status & INT_CFG_NEXT_BCN) {
811 dev_dbg_f(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n");
813 dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n");
815 zd_chip_enable_hwint(&mac->chip);
819 static void set_multicast_hash_handler(struct work_struct *work)
822 container_of(work, struct zd_mac, set_multicast_hash_work);
823 struct zd_mc_hash hash;
825 spin_lock_irq(&mac->lock);
826 hash = mac->multicast_hash;
827 spin_unlock_irq(&mac->lock);
829 zd_chip_set_multicast_hash(&mac->chip, &hash);
832 static void set_rx_filter_handler(struct work_struct *work)
835 container_of(work, struct zd_mac, set_rx_filter_work);
838 dev_dbg_f(zd_mac_dev(mac), "\n");
839 r = set_rx_filter(mac);
841 dev_err(zd_mac_dev(mac), "set_rx_filter_handler error %d\n", r);
844 #define SUPPORTED_FIF_FLAGS \
845 (FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \
846 FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)
847 static void zd_op_configure_filter(struct ieee80211_hw *hw,
848 unsigned int changed_flags,
849 unsigned int *new_flags,
850 int mc_count, struct dev_mc_list *mclist)
852 struct zd_mc_hash hash;
853 struct zd_mac *mac = zd_hw_mac(hw);
857 /* Only deal with supported flags */
858 changed_flags &= SUPPORTED_FIF_FLAGS;
859 *new_flags &= SUPPORTED_FIF_FLAGS;
861 /* changed_flags is always populated but this driver
862 * doesn't support all FIF flags so its possible we don't
863 * need to do anything */
867 if (*new_flags & (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)) {
868 zd_mc_add_all(&hash);
870 DECLARE_MAC_BUF(macbuf);
873 for (i = 0; i < mc_count; i++) {
876 dev_dbg_f(zd_mac_dev(mac), "mc addr %s\n",
877 print_mac(macbuf, mclist->dmi_addr));
878 zd_mc_add_addr(&hash, mclist->dmi_addr);
879 mclist = mclist->next;
883 spin_lock_irqsave(&mac->lock, flags);
884 mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL);
885 mac->pass_ctrl = !!(*new_flags & FIF_CONTROL);
886 mac->multicast_hash = hash;
887 spin_unlock_irqrestore(&mac->lock, flags);
888 queue_work(zd_workqueue, &mac->set_multicast_hash_work);
890 if (changed_flags & FIF_CONTROL)
891 queue_work(zd_workqueue, &mac->set_rx_filter_work);
893 /* no handling required for FIF_OTHER_BSS as we don't currently
894 * do BSSID filtering */
895 /* FIXME: in future it would be nice to enable the probe response
896 * filter (so that the driver doesn't see them) until
897 * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd
898 * have to schedule work to enable prbresp reception, which might
899 * happen too late. For now we'll just listen and forward them all the
903 static void set_rts_cts_work(struct work_struct *work)
906 container_of(work, struct zd_mac, set_rts_cts_work);
908 unsigned int short_preamble;
910 mutex_lock(&mac->chip.mutex);
912 spin_lock_irqsave(&mac->lock, flags);
913 mac->updating_rts_rate = 0;
914 short_preamble = mac->short_preamble;
915 spin_unlock_irqrestore(&mac->lock, flags);
917 zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble);
918 mutex_unlock(&mac->chip.mutex);
921 static void zd_op_bss_info_changed(struct ieee80211_hw *hw,
922 struct ieee80211_vif *vif,
923 struct ieee80211_bss_conf *bss_conf,
926 struct zd_mac *mac = zd_hw_mac(hw);
929 dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
931 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
932 spin_lock_irqsave(&mac->lock, flags);
933 mac->short_preamble = bss_conf->use_short_preamble;
934 if (!mac->updating_rts_rate) {
935 mac->updating_rts_rate = 1;
936 /* FIXME: should disable TX here, until work has
937 * completed and RTS_CTS reg is updated */
938 queue_work(zd_workqueue, &mac->set_rts_cts_work);
940 spin_unlock_irqrestore(&mac->lock, flags);
944 static const struct ieee80211_ops zd_ops = {
946 .start = zd_op_start,
948 .add_interface = zd_op_add_interface,
949 .remove_interface = zd_op_remove_interface,
950 .config = zd_op_config,
951 .config_interface = zd_op_config_interface,
952 .configure_filter = zd_op_configure_filter,
953 .bss_info_changed = zd_op_bss_info_changed,
956 struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf)
959 struct ieee80211_hw *hw;
961 hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops);
963 dev_dbg_f(&intf->dev, "out of memory\n");
969 memset(mac, 0, sizeof(*mac));
970 spin_lock_init(&mac->lock);
973 mac->type = IEEE80211_IF_TYPE_INVALID;
975 memcpy(mac->channels, zd_channels, sizeof(zd_channels));
976 memcpy(mac->rates, zd_rates, sizeof(zd_rates));
977 mac->band.n_bitrates = ARRAY_SIZE(zd_rates);
978 mac->band.bitrates = mac->rates;
979 mac->band.n_channels = ARRAY_SIZE(zd_channels);
980 mac->band.channels = mac->channels;
982 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &mac->band;
984 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
985 IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
987 hw->max_signal = 100;
990 hw->extra_tx_headroom = sizeof(struct zd_ctrlset);
992 skb_queue_head_init(&mac->ack_wait_queue);
994 zd_chip_init(&mac->chip, hw, intf);
995 housekeeping_init(mac);
996 INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler);
997 INIT_WORK(&mac->set_rts_cts_work, set_rts_cts_work);
998 INIT_WORK(&mac->set_rx_filter_work, set_rx_filter_handler);
999 INIT_WORK(&mac->process_intr, zd_process_intr);
1001 SET_IEEE80211_DEV(hw, &intf->dev);
1005 #define LINK_LED_WORK_DELAY HZ
1007 static void link_led_handler(struct work_struct *work)
1009 struct zd_mac *mac =
1010 container_of(work, struct zd_mac, housekeeping.link_led_work.work);
1011 struct zd_chip *chip = &mac->chip;
1015 spin_lock_irq(&mac->lock);
1016 is_associated = mac->associated;
1017 spin_unlock_irq(&mac->lock);
1019 r = zd_chip_control_leds(chip,
1020 is_associated ? LED_ASSOCIATED : LED_SCANNING);
1022 dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
1024 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1025 LINK_LED_WORK_DELAY);
1028 static void housekeeping_init(struct zd_mac *mac)
1030 INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler);
1033 static void housekeeping_enable(struct zd_mac *mac)
1035 dev_dbg_f(zd_mac_dev(mac), "\n");
1036 queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
1040 static void housekeeping_disable(struct zd_mac *mac)
1042 dev_dbg_f(zd_mac_dev(mac), "\n");
1043 cancel_rearming_delayed_workqueue(zd_workqueue,
1044 &mac->housekeeping.link_led_work);
1045 zd_chip_control_leds(&mac->chip, LED_OFF);