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1/*
2 * Copyright (c) 2006 Damien Bergamini <damien.bergamini@free.fr>
3 * Copyright (c) 2006 Sam Leffler, Errno Consulting
4 * Copyright (c) 2007 Christoph Hellwig <hch@lst.de>
5 * Copyright (c) 2008-2009 Weongyo Jeong <weongyo@freebsd.org>
6 * Copyright (c) 2012 Pontus Fuchs <pontus.fuchs@gmail.com>
7 *
8 * Permission to use, copy, modify, and/or distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21/*
22 * This driver is based on the uath driver written by Damien Bergamini for
23 * OpenBSD, who did black-box analysis of the Windows binary driver to find
24 * out how the hardware works. It contains a lot magic numbers because of
25 * that and only has minimal functionality.
26 */
27#include <linux/compiler.h>
28#include <linux/kernel.h>
29#include <linux/module.h>
30#include <linux/list.h>
31#include <linux/completion.h>
32#include <linux/firmware.h>
33#include <linux/skbuff.h>
34#include <linux/usb.h>
35#include <net/mac80211.h>
36
37#include "ar5523.h"
38#include "ar5523_hw.h"
39
40/*
41 * Various supported device vendors/products.
42 * UB51: AR5005UG 802.11b/g, UB52: AR5005UX 802.11a/b/g
43 */
44
45static int ar5523_submit_rx_cmd(struct ar5523 *ar);
46static void ar5523_data_tx_pkt_put(struct ar5523 *ar);
47
48static void ar5523_read_reply(struct ar5523 *ar, struct ar5523_cmd_hdr *hdr,
49 struct ar5523_tx_cmd *cmd)
50{
51 int dlen, olen;
52 __be32 *rp;
53
54 dlen = be32_to_cpu(hdr->len) - sizeof(*hdr);
55
56 if (dlen < 0) {
57 WARN_ON(1);
58 goto out;
59 }
60
61 ar5523_dbg(ar, "Code = %d len = %d\n", be32_to_cpu(hdr->code) & 0xff,
62 dlen);
63
64 rp = (__be32 *)(hdr + 1);
65 if (dlen >= sizeof(u32)) {
66 olen = be32_to_cpu(rp[0]);
67 dlen -= sizeof(u32);
68 if (olen == 0) {
69 /* convention is 0 =>'s one word */
70 olen = sizeof(u32);
71 }
72 } else
73 olen = 0;
74
75 if (cmd->odata) {
76 if (cmd->olen < olen) {
77 ar5523_err(ar, "olen to small %d < %d\n",
78 cmd->olen, olen);
79 cmd->olen = 0;
80 cmd->res = -EOVERFLOW;
81 } else {
82 cmd->olen = olen;
83 memcpy(cmd->odata, &rp[1], olen);
84 cmd->res = 0;
85 }
86 }
87
88out:
89 complete(&cmd->done);
90}
91
92static void ar5523_cmd_rx_cb(struct urb *urb)
93{
94 struct ar5523 *ar = urb->context;
95 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
96 struct ar5523_cmd_hdr *hdr = ar->rx_cmd_buf;
97 int dlen;
98 u32 code, hdrlen;
99
100 if (urb->status) {
101 if (urb->status != -ESHUTDOWN)
102 ar5523_err(ar, "RX USB error %d.\n", urb->status);
103 goto skip;
104 }
105
106 if (urb->actual_length < sizeof(struct ar5523_cmd_hdr)) {
107 ar5523_err(ar, "RX USB to short.\n");
108 goto skip;
109 }
110
111 ar5523_dbg(ar, "%s code %02x priv %d\n", __func__,
112 be32_to_cpu(hdr->code) & 0xff, hdr->priv);
113
114 code = be32_to_cpu(hdr->code);
115 hdrlen = be32_to_cpu(hdr->len);
116
117 switch (code & 0xff) {
118 default:
119 /* reply to a read command */
120 if (hdr->priv != AR5523_CMD_ID) {
121 ar5523_err(ar, "Unexpected command id: %02x\n",
122 code & 0xff);
123 goto skip;
124 }
125 ar5523_read_reply(ar, hdr, cmd);
126 break;
127
128 case WDCMSG_DEVICE_AVAIL:
129 ar5523_dbg(ar, "WDCMSG_DEVICE_AVAIL\n");
130 cmd->res = 0;
131 cmd->olen = 0;
132 complete(&cmd->done);
133 break;
134
135 case WDCMSG_SEND_COMPLETE:
136 ar5523_dbg(ar, "WDCMSG_SEND_COMPLETE: %d pending\n",
137 atomic_read(&ar->tx_nr_pending));
138 if (!test_bit(AR5523_HW_UP, &ar->flags))
139 ar5523_dbg(ar, "Unexpected WDCMSG_SEND_COMPLETE\n");
140 else {
141 mod_timer(&ar->tx_wd_timer,
142 jiffies + AR5523_TX_WD_TIMEOUT);
143 ar5523_data_tx_pkt_put(ar);
144
145 }
146 break;
147
148 case WDCMSG_TARGET_START:
149 /* This command returns a bogus id so it needs special
150 handling */
151 dlen = hdrlen - sizeof(*hdr);
152 if (dlen != (int)sizeof(u32)) {
153 ar5523_err(ar, "Invalid reply to WDCMSG_TARGET_START");
154 return;
155 }
156 memcpy(cmd->odata, hdr + 1, sizeof(u32));
157 cmd->olen = sizeof(u32);
158 cmd->res = 0;
159 complete(&cmd->done);
160 break;
161
162 case WDCMSG_STATS_UPDATE:
163 ar5523_dbg(ar, "WDCMSG_STATS_UPDATE\n");
164 break;
165 }
166
167skip:
168 ar5523_submit_rx_cmd(ar);
169}
170
171static int ar5523_alloc_rx_cmd(struct ar5523 *ar)
172{
173 ar->rx_cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
174 if (!ar->rx_cmd_urb)
175 return -ENOMEM;
176
177 ar->rx_cmd_buf = usb_alloc_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
178 GFP_KERNEL,
179 &ar->rx_cmd_urb->transfer_dma);
180 if (!ar->rx_cmd_buf) {
181 usb_free_urb(ar->rx_cmd_urb);
182 return -ENOMEM;
183 }
184 return 0;
185}
186
187static void ar5523_cancel_rx_cmd(struct ar5523 *ar)
188{
189 usb_kill_urb(ar->rx_cmd_urb);
190}
191
192static void ar5523_free_rx_cmd(struct ar5523 *ar)
193{
194 usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
195 ar->rx_cmd_buf, ar->rx_cmd_urb->transfer_dma);
196 usb_free_urb(ar->rx_cmd_urb);
197}
198
199static int ar5523_submit_rx_cmd(struct ar5523 *ar)
200{
201 int error;
202
203 usb_fill_bulk_urb(ar->rx_cmd_urb, ar->dev,
204 ar5523_cmd_rx_pipe(ar->dev), ar->rx_cmd_buf,
205 AR5523_MAX_RXCMDSZ, ar5523_cmd_rx_cb, ar);
206 ar->rx_cmd_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
207
208 error = usb_submit_urb(ar->rx_cmd_urb, GFP_ATOMIC);
209 if (error) {
210 if (error != -ENODEV)
211 ar5523_err(ar, "error %d when submitting rx urb\n",
212 error);
213 return error;
214 }
215 return 0;
216}
217
218/*
219 * Command submitted cb
220 */
221static void ar5523_cmd_tx_cb(struct urb *urb)
222{
223 struct ar5523_tx_cmd *cmd = urb->context;
224 struct ar5523 *ar = cmd->ar;
225
226 if (urb->status) {
227 ar5523_err(ar, "Failed to TX command. Status = %d\n",
228 urb->status);
229 cmd->res = urb->status;
230 complete(&cmd->done);
231 return;
232 }
233
234 if (!(cmd->flags & AR5523_CMD_FLAG_READ)) {
235 cmd->res = 0;
236 complete(&cmd->done);
237 }
238}
239
240static int ar5523_cmd(struct ar5523 *ar, u32 code, const void *idata,
241 int ilen, void *odata, int olen, int flags)
242{
243 struct ar5523_cmd_hdr *hdr;
244 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
245 int xferlen, error;
246
247 /* always bulk-out a multiple of 4 bytes */
248 xferlen = (sizeof(struct ar5523_cmd_hdr) + ilen + 3) & ~3;
249
250 hdr = (struct ar5523_cmd_hdr *)cmd->buf_tx;
251 memset(hdr, 0, sizeof(struct ar5523_cmd_hdr));
252 hdr->len = cpu_to_be32(xferlen);
253 hdr->code = cpu_to_be32(code);
254 hdr->priv = AR5523_CMD_ID;
255
256 if (flags & AR5523_CMD_FLAG_MAGIC)
257 hdr->magic = cpu_to_be32(1 << 24);
258 memcpy(hdr + 1, idata, ilen);
259
260 cmd->odata = odata;
261 cmd->olen = olen;
262 cmd->flags = flags;
263
264 ar5523_dbg(ar, "do cmd %02x\n", code);
265
266 usb_fill_bulk_urb(cmd->urb_tx, ar->dev, ar5523_cmd_tx_pipe(ar->dev),
267 cmd->buf_tx, xferlen, ar5523_cmd_tx_cb, cmd);
268 cmd->urb_tx->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
269
270 error = usb_submit_urb(cmd->urb_tx, GFP_KERNEL);
271 if (error) {
272 ar5523_err(ar, "could not send command 0x%x, error=%d\n",
273 code, error);
274 return error;
275 }
276
277 if (!wait_for_completion_timeout(&cmd->done, 2 * HZ)) {
278 cmd->odata = NULL;
279 ar5523_err(ar, "timeout waiting for command %02x reply\n",
280 code);
281 cmd->res = -ETIMEDOUT;
282 }
283 return cmd->res;
284}
285
286static int ar5523_cmd_write(struct ar5523 *ar, u32 code, const void *data,
287 int len, int flags)
288{
289 flags &= ~AR5523_CMD_FLAG_READ;
290 return ar5523_cmd(ar, code, data, len, NULL, 0, flags);
291}
292
293static int ar5523_cmd_read(struct ar5523 *ar, u32 code, const void *idata,
294 int ilen, void *odata, int olen, int flags)
295{
296 flags |= AR5523_CMD_FLAG_READ;
297 return ar5523_cmd(ar, code, idata, ilen, odata, olen, flags);
298}
299
300static int ar5523_config(struct ar5523 *ar, u32 reg, u32 val)
301{
302 struct ar5523_write_mac write;
303 int error;
304
305 write.reg = cpu_to_be32(reg);
306 write.len = cpu_to_be32(0); /* 0 = single write */
307 *(__be32 *)write.data = cpu_to_be32(val);
308
309 error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
310 3 * sizeof(u32), 0);
311 if (error != 0)
312 ar5523_err(ar, "could not write register 0x%02x\n", reg);
313 return error;
314}
315
316static int ar5523_config_multi(struct ar5523 *ar, u32 reg, const void *data,
317 int len)
318{
319 struct ar5523_write_mac write;
320 int error;
321
322 write.reg = cpu_to_be32(reg);
323 write.len = cpu_to_be32(len);
324 memcpy(write.data, data, len);
325
326 /* properly handle the case where len is zero (reset) */
327 error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
328 (len == 0) ? sizeof(u32) : 2 * sizeof(u32) + len, 0);
329 if (error != 0)
330 ar5523_err(ar, "could not write %d bytes to register 0x%02x\n",
331 len, reg);
332 return error;
333}
334
335static int ar5523_get_status(struct ar5523 *ar, u32 which, void *odata,
336 int olen)
337{
338 int error;
339 __be32 which_be;
340
341 which_be = cpu_to_be32(which);
342 error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_STATUS,
343 &which_be, sizeof(which_be), odata, olen, AR5523_CMD_FLAG_MAGIC);
344 if (error != 0)
345 ar5523_err(ar, "could not read EEPROM offset 0x%02x\n", which);
346 return error;
347}
348
349static int ar5523_get_capability(struct ar5523 *ar, u32 cap, u32 *val)
350{
351 int error;
352 __be32 cap_be, val_be;
353
354 cap_be = cpu_to_be32(cap);
355 error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_CAPABILITY, &cap_be,
356 sizeof(cap_be), &val_be, sizeof(__be32),
357 AR5523_CMD_FLAG_MAGIC);
358 if (error != 0) {
359 ar5523_err(ar, "could not read capability %u\n", cap);
360 return error;
361 }
362 *val = be32_to_cpu(val_be);
363 return error;
364}
365
366static int ar5523_get_devcap(struct ar5523 *ar)
367{
368#define GETCAP(x) do { \
369 error = ar5523_get_capability(ar, x, &cap); \
370 if (error != 0) \
371 return error; \
372 ar5523_info(ar, "Cap: " \
373 "%s=0x%08x\n", #x, cap); \
374} while (0)
375 int error;
376 u32 cap;
377
378 /* collect device capabilities */
379 GETCAP(CAP_TARGET_VERSION);
380 GETCAP(CAP_TARGET_REVISION);
381 GETCAP(CAP_MAC_VERSION);
382 GETCAP(CAP_MAC_REVISION);
383 GETCAP(CAP_PHY_REVISION);
384 GETCAP(CAP_ANALOG_5GHz_REVISION);
385 GETCAP(CAP_ANALOG_2GHz_REVISION);
386
387 GETCAP(CAP_REG_DOMAIN);
388 GETCAP(CAP_REG_CAP_BITS);
389 GETCAP(CAP_WIRELESS_MODES);
390 GETCAP(CAP_CHAN_SPREAD_SUPPORT);
391 GETCAP(CAP_COMPRESS_SUPPORT);
392 GETCAP(CAP_BURST_SUPPORT);
393 GETCAP(CAP_FAST_FRAMES_SUPPORT);
394 GETCAP(CAP_CHAP_TUNING_SUPPORT);
395 GETCAP(CAP_TURBOG_SUPPORT);
396 GETCAP(CAP_TURBO_PRIME_SUPPORT);
397 GETCAP(CAP_DEVICE_TYPE);
398 GETCAP(CAP_WME_SUPPORT);
399 GETCAP(CAP_TOTAL_QUEUES);
400 GETCAP(CAP_CONNECTION_ID_MAX);
401
402 GETCAP(CAP_LOW_5GHZ_CHAN);
403 GETCAP(CAP_HIGH_5GHZ_CHAN);
404 GETCAP(CAP_LOW_2GHZ_CHAN);
405 GETCAP(CAP_HIGH_2GHZ_CHAN);
406 GETCAP(CAP_TWICE_ANTENNAGAIN_5G);
407 GETCAP(CAP_TWICE_ANTENNAGAIN_2G);
408
409 GETCAP(CAP_CIPHER_AES_CCM);
410 GETCAP(CAP_CIPHER_TKIP);
411 GETCAP(CAP_MIC_TKIP);
412 return 0;
413}
414
415static int ar5523_set_ledsteady(struct ar5523 *ar, int lednum, int ledmode)
416{
417 struct ar5523_cmd_ledsteady led;
418
419 led.lednum = cpu_to_be32(lednum);
420 led.ledmode = cpu_to_be32(ledmode);
421
422 ar5523_dbg(ar, "set %s led %s (steady)\n",
423 (lednum == UATH_LED_LINK) ? "link" : "activity",
424 ledmode ? "on" : "off");
425 return ar5523_cmd_write(ar, WDCMSG_SET_LED_STEADY, &led, sizeof(led),
426 0);
427}
428
429static int ar5523_set_rxfilter(struct ar5523 *ar, u32 bits, u32 op)
430{
431 struct ar5523_cmd_rx_filter rxfilter;
432
433 rxfilter.bits = cpu_to_be32(bits);
434 rxfilter.op = cpu_to_be32(op);
435
436 ar5523_dbg(ar, "setting Rx filter=0x%x flags=0x%x\n", bits, op);
437 return ar5523_cmd_write(ar, WDCMSG_RX_FILTER, &rxfilter,
438 sizeof(rxfilter), 0);
439}
440
441static int ar5523_reset_tx_queues(struct ar5523 *ar)
442{
443 __be32 qid = cpu_to_be32(0);
444
445 ar5523_dbg(ar, "resetting Tx queue\n");
446 return ar5523_cmd_write(ar, WDCMSG_RELEASE_TX_QUEUE,
447 &qid, sizeof(qid), 0);
448}
449
450static int ar5523_set_chan(struct ar5523 *ar)
451{
452 struct ieee80211_conf *conf = &ar->hw->conf;
453
454 struct ar5523_cmd_reset reset;
455
456 memset(&reset, 0, sizeof(reset));
457 reset.flags |= cpu_to_be32(UATH_CHAN_2GHZ);
458 reset.flags |= cpu_to_be32(UATH_CHAN_OFDM);
459 reset.freq = cpu_to_be32(conf->chandef.chan->center_freq);
460 reset.maxrdpower = cpu_to_be32(50); /* XXX */
461 reset.channelchange = cpu_to_be32(1);
462 reset.keeprccontent = cpu_to_be32(0);
463
464 ar5523_dbg(ar, "set chan flags 0x%x freq %d\n",
465 be32_to_cpu(reset.flags),
466 conf->chandef.chan->center_freq);
467 return ar5523_cmd_write(ar, WDCMSG_RESET, &reset, sizeof(reset), 0);
468}
469
470static int ar5523_queue_init(struct ar5523 *ar)
471{
472 struct ar5523_cmd_txq_setup qinfo;
473
474 ar5523_dbg(ar, "setting up Tx queue\n");
475 qinfo.qid = cpu_to_be32(0);
476 qinfo.len = cpu_to_be32(sizeof(qinfo.attr));
477 qinfo.attr.priority = cpu_to_be32(0); /* XXX */
478 qinfo.attr.aifs = cpu_to_be32(3);
479 qinfo.attr.logcwmin = cpu_to_be32(4);
480 qinfo.attr.logcwmax = cpu_to_be32(10);
481 qinfo.attr.bursttime = cpu_to_be32(0);
482 qinfo.attr.mode = cpu_to_be32(0);
483 qinfo.attr.qflags = cpu_to_be32(1); /* XXX? */
484 return ar5523_cmd_write(ar, WDCMSG_SETUP_TX_QUEUE, &qinfo,
485 sizeof(qinfo), 0);
486}
487
488static int ar5523_switch_chan(struct ar5523 *ar)
489{
490 int error;
491
492 error = ar5523_set_chan(ar);
493 if (error) {
494 ar5523_err(ar, "could not set chan, error %d\n", error);
495 goto out_err;
496 }
497
498 /* reset Tx rings */
499 error = ar5523_reset_tx_queues(ar);
500 if (error) {
501 ar5523_err(ar, "could not reset Tx queues, error %d\n",
502 error);
503 goto out_err;
504 }
505 /* set Tx rings WME properties */
506 error = ar5523_queue_init(ar);
507 if (error)
508 ar5523_err(ar, "could not init wme, error %d\n", error);
509
510out_err:
511 return error;
512}
513
514static void ar5523_rx_data_put(struct ar5523 *ar,
515 struct ar5523_rx_data *data)
516{
517 unsigned long flags;
518 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
519 list_move(&data->list, &ar->rx_data_free);
520 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
521}
522
523static void ar5523_data_rx_cb(struct urb *urb)
524{
525 struct ar5523_rx_data *data = urb->context;
526 struct ar5523 *ar = data->ar;
527 struct ar5523_rx_desc *desc;
528 struct ar5523_chunk *chunk;
529 struct ieee80211_hw *hw = ar->hw;
530 struct ieee80211_rx_status *rx_status;
531 u32 rxlen;
532 int usblen = urb->actual_length;
533 int hdrlen, pad;
534
535 ar5523_dbg(ar, "%s\n", __func__);
536 /* sync/async unlink faults aren't errors */
537 if (urb->status) {
538 if (urb->status != -ESHUTDOWN)
539 ar5523_err(ar, "%s: USB err: %d\n", __func__,
540 urb->status);
541 goto skip;
542 }
543
544 if (usblen < AR5523_MIN_RXBUFSZ) {
545 ar5523_err(ar, "RX: wrong xfer size (usblen=%d)\n", usblen);
546 goto skip;
547 }
548
549 chunk = (struct ar5523_chunk *) data->skb->data;
550
551 if (((chunk->flags & UATH_CFLAGS_FINAL) == 0) ||
552 chunk->seqnum != 0) {
553 ar5523_dbg(ar, "RX: No final flag. s: %d f: %02x l: %d\n",
554 chunk->seqnum, chunk->flags,
555 be16_to_cpu(chunk->length));
556 goto skip;
557 }
558
559 /* Rx descriptor is located at the end, 32-bit aligned */
560 desc = (struct ar5523_rx_desc *)
561 (data->skb->data + usblen - sizeof(struct ar5523_rx_desc));
562
563 rxlen = be32_to_cpu(desc->len);
564 if (rxlen > ar->rxbufsz) {
565 ar5523_dbg(ar, "RX: Bad descriptor (len=%d)\n",
566 be32_to_cpu(desc->len));
567 goto skip;
568 }
569
570 if (!rxlen) {
571 ar5523_dbg(ar, "RX: rxlen is 0\n");
572 goto skip;
573 }
574
575 if (be32_to_cpu(desc->status) != 0) {
576 ar5523_dbg(ar, "Bad RX status (0x%x len = %d). Skip\n",
577 be32_to_cpu(desc->status), be32_to_cpu(desc->len));
578 goto skip;
579 }
580
581 skb_reserve(data->skb, sizeof(*chunk));
582 skb_put(data->skb, rxlen - sizeof(struct ar5523_rx_desc));
583
584 hdrlen = ieee80211_get_hdrlen_from_skb(data->skb);
585 if (!IS_ALIGNED(hdrlen, 4)) {
586 ar5523_dbg(ar, "eek, alignment workaround activated\n");
587 pad = ALIGN(hdrlen, 4) - hdrlen;
588 memmove(data->skb->data + pad, data->skb->data, hdrlen);
589 skb_pull(data->skb, pad);
590 skb_put(data->skb, pad);
591 }
592
593 rx_status = IEEE80211_SKB_RXCB(data->skb);
594 memset(rx_status, 0, sizeof(*rx_status));
595 rx_status->freq = be32_to_cpu(desc->channel);
596 rx_status->band = hw->conf.chandef.chan->band;
597 rx_status->signal = -95 + be32_to_cpu(desc->rssi);
598
599 ieee80211_rx_irqsafe(hw, data->skb);
600 data->skb = NULL;
601
602skip:
603 if (data->skb) {
604 dev_kfree_skb_irq(data->skb);
605 data->skb = NULL;
606 }
607
608 ar5523_rx_data_put(ar, data);
609 if (atomic_inc_return(&ar->rx_data_free_cnt) >=
610 AR5523_RX_DATA_REFILL_COUNT &&
611 test_bit(AR5523_HW_UP, &ar->flags))
612 queue_work(ar->wq, &ar->rx_refill_work);
613}
614
615static void ar5523_rx_refill_work(struct work_struct *work)
616{
617 struct ar5523 *ar = container_of(work, struct ar5523, rx_refill_work);
618 struct ar5523_rx_data *data;
619 unsigned long flags;
620 int error;
621
622 ar5523_dbg(ar, "%s\n", __func__);
623 do {
624 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
625
626 if (!list_empty(&ar->rx_data_free))
627 data = (struct ar5523_rx_data *) ar->rx_data_free.next;
628 else
629 data = NULL;
630 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
631
632 if (!data)
633 goto done;
634
635 data->skb = alloc_skb(ar->rxbufsz, GFP_KERNEL);
636 if (!data->skb) {
637 ar5523_err(ar, "could not allocate rx skbuff\n");
638 return;
639 }
640
641 usb_fill_bulk_urb(data->urb, ar->dev,
642 ar5523_data_rx_pipe(ar->dev), data->skb->data,
643 ar->rxbufsz, ar5523_data_rx_cb, data);
644
645 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
646 list_move(&data->list, &ar->rx_data_used);
647 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
648 atomic_dec(&ar->rx_data_free_cnt);
649
650 error = usb_submit_urb(data->urb, GFP_KERNEL);
651 if (error) {
652 kfree_skb(data->skb);
653 if (error != -ENODEV)
654 ar5523_err(ar, "Err sending rx data urb %d\n",
655 error);
656 ar5523_rx_data_put(ar, data);
657 atomic_inc(&ar->rx_data_free_cnt);
658 return;
659 }
660
661 } while (true);
662done:
663 return;
664}
665
666static void ar5523_cancel_rx_bufs(struct ar5523 *ar)
667{
668 struct ar5523_rx_data *data;
669 unsigned long flags;
670
671 do {
672 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
673 if (!list_empty(&ar->rx_data_used))
674 data = (struct ar5523_rx_data *) ar->rx_data_used.next;
675 else
676 data = NULL;
677 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
678
679 if (!data)
680 break;
681
682 usb_kill_urb(data->urb);
683 list_move(&data->list, &ar->rx_data_free);
684 atomic_inc(&ar->rx_data_free_cnt);
685 } while (data);
686}
687
688static void ar5523_free_rx_bufs(struct ar5523 *ar)
689{
690 struct ar5523_rx_data *data;
691
692 ar5523_cancel_rx_bufs(ar);
693 while (!list_empty(&ar->rx_data_free)) {
694 data = (struct ar5523_rx_data *) ar->rx_data_free.next;
695 list_del(&data->list);
696 usb_free_urb(data->urb);
697 }
698}
699
700static int ar5523_alloc_rx_bufs(struct ar5523 *ar)
701{
702 int i;
703
704 for (i = 0; i < AR5523_RX_DATA_COUNT; i++) {
705 struct ar5523_rx_data *data = &ar->rx_data[i];
706
707 data->ar = ar;
708 data->urb = usb_alloc_urb(0, GFP_KERNEL);
709 if (!data->urb) {
710 ar5523_err(ar, "could not allocate rx data urb\n");
711 goto err;
712 }
713 list_add_tail(&data->list, &ar->rx_data_free);
714 atomic_inc(&ar->rx_data_free_cnt);
715 }
716 return 0;
717
718err:
719 ar5523_free_rx_bufs(ar);
720 return -ENOMEM;
721}
722
723static void ar5523_data_tx_pkt_put(struct ar5523 *ar)
724{
725 atomic_dec(&ar->tx_nr_total);
726 if (!atomic_dec_return(&ar->tx_nr_pending)) {
727 del_timer(&ar->tx_wd_timer);
728 wake_up(&ar->tx_flush_waitq);
729 }
730
731 if (atomic_read(&ar->tx_nr_total) < AR5523_TX_DATA_RESTART_COUNT) {
732 ar5523_dbg(ar, "restart tx queue\n");
733 ieee80211_wake_queues(ar->hw);
734 }
735}
736
737static void ar5523_data_tx_cb(struct urb *urb)
738{
739 struct sk_buff *skb = urb->context;
740 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
741 struct ar5523_tx_data *data = (struct ar5523_tx_data *)
742 txi->driver_data;
743 struct ar5523 *ar = data->ar;
744 unsigned long flags;
745
746 ar5523_dbg(ar, "data tx urb completed: %d\n", urb->status);
747
748 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
749 list_del(&data->list);
750 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
751
752 if (urb->status) {
753 ar5523_dbg(ar, "%s: urb status: %d\n", __func__, urb->status);
754 ar5523_data_tx_pkt_put(ar);
755 ieee80211_free_txskb(ar->hw, skb);
756 } else {
757 skb_pull(skb, sizeof(struct ar5523_tx_desc) + sizeof(__be32));
758 ieee80211_tx_status_irqsafe(ar->hw, skb);
759 }
760 usb_free_urb(urb);
761}
762
763static void ar5523_tx(struct ieee80211_hw *hw,
764 struct ieee80211_tx_control *control,
765 struct sk_buff *skb)
766{
767 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
768 struct ar5523_tx_data *data = (struct ar5523_tx_data *)
769 txi->driver_data;
770 struct ar5523 *ar = hw->priv;
771 unsigned long flags;
772
773 ar5523_dbg(ar, "tx called\n");
774 if (atomic_inc_return(&ar->tx_nr_total) >= AR5523_TX_DATA_COUNT) {
775 ar5523_dbg(ar, "tx queue full\n");
776 ar5523_dbg(ar, "stop queues (tot %d pend %d)\n",
777 atomic_read(&ar->tx_nr_total),
778 atomic_read(&ar->tx_nr_pending));
779 ieee80211_stop_queues(hw);
780 }
781
782 data->skb = skb;
783
784 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
785 list_add_tail(&data->list, &ar->tx_queue_pending);
786 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
787
788 ieee80211_queue_work(ar->hw, &ar->tx_work);
789}
790
791static void ar5523_tx_work_locked(struct ar5523 *ar)
792{
793 struct ar5523_tx_data *data;
794 struct ar5523_tx_desc *desc;
795 struct ar5523_chunk *chunk;
796 struct ieee80211_tx_info *txi;
797 struct urb *urb;
798 struct sk_buff *skb;
799 int error = 0, paylen;
800 u32 txqid;
801 unsigned long flags;
802
803 BUILD_BUG_ON(sizeof(struct ar5523_tx_data) >
804 IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
805
806 ar5523_dbg(ar, "%s\n", __func__);
807 do {
808 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
809 if (!list_empty(&ar->tx_queue_pending)) {
810 data = (struct ar5523_tx_data *)
811 ar->tx_queue_pending.next;
812 list_del(&data->list);
813 } else
814 data = NULL;
815 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
816
817 if (!data)
818 break;
819
820 skb = data->skb;
821 txqid = 0;
822 txi = IEEE80211_SKB_CB(skb);
823 paylen = skb->len;
824 urb = usb_alloc_urb(0, GFP_KERNEL);
825 if (!urb) {
826 ar5523_err(ar, "Failed to allocate TX urb\n");
827 ieee80211_free_txskb(ar->hw, skb);
828 continue;
829 }
830
831 data->ar = ar;
832 data->urb = urb;
833
834 desc = (struct ar5523_tx_desc *)skb_push(skb, sizeof(*desc));
835 chunk = (struct ar5523_chunk *)skb_push(skb, sizeof(*chunk));
836
837 chunk->seqnum = 0;
838 chunk->flags = UATH_CFLAGS_FINAL;
839 chunk->length = cpu_to_be16(skb->len);
840
841 desc->msglen = cpu_to_be32(skb->len);
842 desc->msgid = AR5523_DATA_ID;
843 desc->buflen = cpu_to_be32(paylen);
844 desc->type = cpu_to_be32(WDCMSG_SEND);
845 desc->flags = cpu_to_be32(UATH_TX_NOTIFY);
846
847 if (test_bit(AR5523_CONNECTED, &ar->flags))
848 desc->connid = cpu_to_be32(AR5523_ID_BSS);
849 else
850 desc->connid = cpu_to_be32(AR5523_ID_BROADCAST);
851
852 if (txi->flags & IEEE80211_TX_CTL_USE_MINRATE)
853 txqid |= UATH_TXQID_MINRATE;
854
855 desc->txqid = cpu_to_be32(txqid);
856
857 urb->transfer_flags = URB_ZERO_PACKET;
858 usb_fill_bulk_urb(urb, ar->dev, ar5523_data_tx_pipe(ar->dev),
859 skb->data, skb->len, ar5523_data_tx_cb, skb);
860
861 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
862 list_add_tail(&data->list, &ar->tx_queue_submitted);
863 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
864 mod_timer(&ar->tx_wd_timer, jiffies + AR5523_TX_WD_TIMEOUT);
865 atomic_inc(&ar->tx_nr_pending);
866
867 ar5523_dbg(ar, "TX Frame (%d pending)\n",
868 atomic_read(&ar->tx_nr_pending));
869 error = usb_submit_urb(urb, GFP_KERNEL);
870 if (error) {
871 ar5523_err(ar, "error %d when submitting tx urb\n",
872 error);
873 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
874 list_del(&data->list);
875 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
876 atomic_dec(&ar->tx_nr_pending);
877 ar5523_data_tx_pkt_put(ar);
878 usb_free_urb(urb);
879 ieee80211_free_txskb(ar->hw, skb);
880 }
881 } while (true);
882}
883
884static void ar5523_tx_work(struct work_struct *work)
885{
886 struct ar5523 *ar = container_of(work, struct ar5523, tx_work);
887
888 ar5523_dbg(ar, "%s\n", __func__);
889 mutex_lock(&ar->mutex);
890 ar5523_tx_work_locked(ar);
891 mutex_unlock(&ar->mutex);
892}
893
894static void ar5523_tx_wd_timer(unsigned long arg)
895{
896 struct ar5523 *ar = (struct ar5523 *) arg;
897
898 ar5523_dbg(ar, "TX watchdog timer triggered\n");
899 ieee80211_queue_work(ar->hw, &ar->tx_wd_work);
900}
901
902static void ar5523_tx_wd_work(struct work_struct *work)
903{
904 struct ar5523 *ar = container_of(work, struct ar5523, tx_wd_work);
905
906 /* Occasionally the TX queues stop responding. The only way to
907 * recover seems to be to reset the dongle.
908 */
909
910 mutex_lock(&ar->mutex);
911 ar5523_err(ar, "TX queue stuck (tot %d pend %d)\n",
912 atomic_read(&ar->tx_nr_total),
913 atomic_read(&ar->tx_nr_pending));
914
915 ar5523_err(ar, "Will restart dongle.\n");
916 ar5523_cmd_write(ar, WDCMSG_TARGET_RESET, NULL, 0, 0);
917 mutex_unlock(&ar->mutex);
918}
919
920static void ar5523_flush_tx(struct ar5523 *ar)
921{
922 ar5523_tx_work_locked(ar);
923
924 /* Don't waste time trying to flush if USB is disconnected */
925 if (test_bit(AR5523_USB_DISCONNECTED, &ar->flags))
926 return;
927 if (!wait_event_timeout(ar->tx_flush_waitq,
928 !atomic_read(&ar->tx_nr_pending), AR5523_FLUSH_TIMEOUT))
929 ar5523_err(ar, "flush timeout (tot %d pend %d)\n",
930 atomic_read(&ar->tx_nr_total),
931 atomic_read(&ar->tx_nr_pending));
932}
933
934static void ar5523_free_tx_cmd(struct ar5523 *ar)
935{
936 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
937
938 usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ, cmd->buf_tx,
939 cmd->urb_tx->transfer_dma);
940 usb_free_urb(cmd->urb_tx);
941}
942
943static int ar5523_alloc_tx_cmd(struct ar5523 *ar)
944{
945 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
946
947 cmd->ar = ar;
948 init_completion(&cmd->done);
949
950 cmd->urb_tx = usb_alloc_urb(0, GFP_KERNEL);
951 if (!cmd->urb_tx) {
952 ar5523_err(ar, "could not allocate urb\n");
953 return -ENOMEM;
954 }
955 cmd->buf_tx = usb_alloc_coherent(ar->dev, AR5523_MAX_TXCMDSZ,
956 GFP_KERNEL,
957 &cmd->urb_tx->transfer_dma);
958 if (!cmd->buf_tx) {
959 usb_free_urb(cmd->urb_tx);
960 return -ENOMEM;
961 }
962 return 0;
963}
964
965/*
966 * This function is called periodically (every second) when associated to
967 * query device statistics.
968 */
969static void ar5523_stat_work(struct work_struct *work)
970{
971 struct ar5523 *ar = container_of(work, struct ar5523, stat_work.work);
972 int error;
973
974 ar5523_dbg(ar, "%s\n", __func__);
975 mutex_lock(&ar->mutex);
976
977 /*
978 * Send request for statistics asynchronously once a second. This
979 * seems to be important. Throughput is a lot better if this is done.
980 */
981 error = ar5523_cmd_write(ar, WDCMSG_TARGET_GET_STATS, NULL, 0, 0);
982 if (error)
983 ar5523_err(ar, "could not query stats, error %d\n", error);
984 mutex_unlock(&ar->mutex);
985 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, HZ);
986}
987
988/*
989 * Interface routines to the mac80211 stack.
990 */
991static int ar5523_start(struct ieee80211_hw *hw)
992{
993 struct ar5523 *ar = hw->priv;
994 int error;
995 __be32 val;
996
997 ar5523_dbg(ar, "start called\n");
998
999 mutex_lock(&ar->mutex);
1000 val = cpu_to_be32(0);
1001 ar5523_cmd_write(ar, WDCMSG_BIND, &val, sizeof(val), 0);
1002
1003 /* set MAC address */
1004 ar5523_config_multi(ar, CFG_MAC_ADDR, &ar->hw->wiphy->perm_addr,
1005 ETH_ALEN);
1006
1007 /* XXX honor net80211 state */
1008 ar5523_config(ar, CFG_RATE_CONTROL_ENABLE, 0x00000001);
1009 ar5523_config(ar, CFG_DIVERSITY_CTL, 0x00000001);
1010 ar5523_config(ar, CFG_ABOLT, 0x0000003f);
1011 ar5523_config(ar, CFG_WME_ENABLED, 0x00000000);
1012
1013 ar5523_config(ar, CFG_SERVICE_TYPE, 1);
1014 ar5523_config(ar, CFG_TP_SCALE, 0x00000000);
1015 ar5523_config(ar, CFG_TPC_HALF_DBM5, 0x0000003c);
1016 ar5523_config(ar, CFG_TPC_HALF_DBM2, 0x0000003c);
1017 ar5523_config(ar, CFG_OVERRD_TX_POWER, 0x00000000);
1018 ar5523_config(ar, CFG_GMODE_PROTECTION, 0x00000000);
1019 ar5523_config(ar, CFG_GMODE_PROTECT_RATE_INDEX, 0x00000003);
1020 ar5523_config(ar, CFG_PROTECTION_TYPE, 0x00000000);
1021 ar5523_config(ar, CFG_MODE_CTS, 0x00000002);
1022
1023 error = ar5523_cmd_read(ar, WDCMSG_TARGET_START, NULL, 0,
1024 &val, sizeof(val), AR5523_CMD_FLAG_MAGIC);
1025 if (error) {
1026 ar5523_dbg(ar, "could not start target, error %d\n", error);
1027 goto err;
1028 }
1029 ar5523_dbg(ar, "WDCMSG_TARGET_START returns handle: 0x%x\n",
1030 be32_to_cpu(val));
1031
1032 ar5523_switch_chan(ar);
1033
1034 val = cpu_to_be32(TARGET_DEVICE_AWAKE);
1035 ar5523_cmd_write(ar, WDCMSG_SET_PWR_MODE, &val, sizeof(val), 0);
1036 /* XXX? check */
1037 ar5523_cmd_write(ar, WDCMSG_RESET_KEY_CACHE, NULL, 0, 0);
1038
1039 set_bit(AR5523_HW_UP, &ar->flags);
1040 queue_work(ar->wq, &ar->rx_refill_work);
1041
1042 /* enable Rx */
1043 ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1044 ar5523_set_rxfilter(ar,
1045 UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1046 UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON,
1047 UATH_FILTER_OP_SET);
1048
1049 ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_ON);
1050 ar5523_dbg(ar, "start OK\n");
1051
1052err:
1053 mutex_unlock(&ar->mutex);
1054 return error;
1055}
1056
1057static void ar5523_stop(struct ieee80211_hw *hw)
1058{
1059 struct ar5523 *ar = hw->priv;
1060
1061 ar5523_dbg(ar, "stop called\n");
1062
1063 cancel_delayed_work_sync(&ar->stat_work);
1064 mutex_lock(&ar->mutex);
1065 clear_bit(AR5523_HW_UP, &ar->flags);
1066
1067 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1068 ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_OFF);
1069
1070 ar5523_cmd_write(ar, WDCMSG_TARGET_STOP, NULL, 0, 0);
1071
1072 del_timer_sync(&ar->tx_wd_timer);
1073 cancel_work_sync(&ar->tx_wd_work);
1074 cancel_work_sync(&ar->rx_refill_work);
1075 ar5523_cancel_rx_bufs(ar);
1076 mutex_unlock(&ar->mutex);
1077}
1078
1079static int ar5523_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1080{
1081 struct ar5523 *ar = hw->priv;
1082 int ret;
1083
1084 ar5523_dbg(ar, "set_rts_threshold called\n");
1085 mutex_lock(&ar->mutex);
1086
1087 ret = ar5523_config(ar, CFG_USER_RTS_THRESHOLD, value);
1088
1089 mutex_unlock(&ar->mutex);
1090 return ret;
1091}
1092
1093static void ar5523_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1094{
1095 struct ar5523 *ar = hw->priv;
1096
1097 ar5523_dbg(ar, "flush called\n");
1098 ar5523_flush_tx(ar);
1099}
1100
1101static int ar5523_add_interface(struct ieee80211_hw *hw,
1102 struct ieee80211_vif *vif)
1103{
1104 struct ar5523 *ar = hw->priv;
1105
1106 ar5523_dbg(ar, "add interface called\n");
1107
1108 if (ar->vif) {
1109 ar5523_dbg(ar, "invalid add_interface\n");
1110 return -EOPNOTSUPP;
1111 }
1112
1113 switch (vif->type) {
1114 case NL80211_IFTYPE_STATION:
1115 ar->vif = vif;
1116 break;
1117 default:
1118 return -EOPNOTSUPP;
1119 }
1120 return 0;
1121}
1122
1123static void ar5523_remove_interface(struct ieee80211_hw *hw,
1124 struct ieee80211_vif *vif)
1125{
1126 struct ar5523 *ar = hw->priv;
1127
1128 ar5523_dbg(ar, "remove interface called\n");
1129 ar->vif = NULL;
1130}
1131
1132static int ar5523_hwconfig(struct ieee80211_hw *hw, u32 changed)
1133{
1134 struct ar5523 *ar = hw->priv;
1135
1136 ar5523_dbg(ar, "config called\n");
1137 mutex_lock(&ar->mutex);
1138 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1139 ar5523_dbg(ar, "Do channel switch\n");
1140 ar5523_flush_tx(ar);
1141 ar5523_switch_chan(ar);
1142 }
1143 mutex_unlock(&ar->mutex);
1144 return 0;
1145}
1146
1147static int ar5523_get_wlan_mode(struct ar5523 *ar,
1148 struct ieee80211_bss_conf *bss_conf)
1149{
1150 struct ieee80211_supported_band *band;
1151 int bit;
1152 struct ieee80211_sta *sta;
1153 u32 sta_rate_set;
1154
1155 band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1156 sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1157 if (!sta) {
1158 ar5523_info(ar, "STA not found!\n");
1159 return WLAN_MODE_11b;
1160 }
1161 sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
1162
1163 for (bit = 0; bit < band->n_bitrates; bit++) {
1164 if (sta_rate_set & 1) {
1165 int rate = band->bitrates[bit].bitrate;
1166 switch (rate) {
1167 case 60:
1168 case 90:
1169 case 120:
1170 case 180:
1171 case 240:
1172 case 360:
1173 case 480:
1174 case 540:
1175 return WLAN_MODE_11g;
1176 }
1177 }
1178 sta_rate_set >>= 1;
1179 }
1180 return WLAN_MODE_11b;
1181}
1182
1183static void ar5523_create_rateset(struct ar5523 *ar,
1184 struct ieee80211_bss_conf *bss_conf,
1185 struct ar5523_cmd_rateset *rs,
1186 bool basic)
1187{
1188 struct ieee80211_supported_band *band;
1189 struct ieee80211_sta *sta;
1190 int bit, i = 0;
1191 u32 sta_rate_set, basic_rate_set;
1192
1193 sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1194 basic_rate_set = bss_conf->basic_rates;
1195 if (!sta) {
1196 ar5523_info(ar, "STA not found. Cannot set rates\n");
1197 sta_rate_set = bss_conf->basic_rates;
1198 } else
1199 sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
1200
1201 ar5523_dbg(ar, "sta rate_set = %08x\n", sta_rate_set);
1202
1203 band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1204 for (bit = 0; bit < band->n_bitrates; bit++) {
1205 BUG_ON(i >= AR5523_MAX_NRATES);
1206 ar5523_dbg(ar, "Considering rate %d : %d\n",
1207 band->bitrates[bit].hw_value, sta_rate_set & 1);
1208 if (sta_rate_set & 1) {
1209 rs->set[i] = band->bitrates[bit].hw_value;
1210 if (basic_rate_set & 1 && basic)
1211 rs->set[i] |= 0x80;
1212 i++;
1213 }
1214 sta_rate_set >>= 1;
1215 basic_rate_set >>= 1;
1216 }
1217
1218 rs->length = i;
1219}
1220
1221static int ar5523_set_basic_rates(struct ar5523 *ar,
1222 struct ieee80211_bss_conf *bss)
1223{
1224 struct ar5523_cmd_rates rates;
1225
1226 memset(&rates, 0, sizeof(rates));
1227 rates.connid = cpu_to_be32(2); /* XXX */
1228 rates.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1229 ar5523_create_rateset(ar, bss, &rates.rateset, true);
1230
1231 return ar5523_cmd_write(ar, WDCMSG_SET_BASIC_RATE, &rates,
1232 sizeof(rates), 0);
1233}
1234
1235static int ar5523_create_connection(struct ar5523 *ar,
1236 struct ieee80211_vif *vif,
1237 struct ieee80211_bss_conf *bss)
1238{
1239 struct ar5523_cmd_create_connection create;
1240 int wlan_mode;
1241
1242 memset(&create, 0, sizeof(create));
1243 create.connid = cpu_to_be32(2);
1244 create.bssid = cpu_to_be32(0);
1245 /* XXX packed or not? */
1246 create.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1247
1248 ar5523_create_rateset(ar, bss, &create.connattr.rateset, false);
1249
1250 wlan_mode = ar5523_get_wlan_mode(ar, bss);
1251 create.connattr.wlanmode = cpu_to_be32(wlan_mode);
1252
1253 return ar5523_cmd_write(ar, WDCMSG_CREATE_CONNECTION, &create,
1254 sizeof(create), 0);
1255}
1256
1257static int ar5523_write_associd(struct ar5523 *ar,
1258 struct ieee80211_bss_conf *bss)
1259{
1260 struct ar5523_cmd_set_associd associd;
1261
1262 memset(&associd, 0, sizeof(associd));
1263 associd.defaultrateix = cpu_to_be32(0); /* XXX */
1264 associd.associd = cpu_to_be32(bss->aid);
1265 associd.timoffset = cpu_to_be32(0x3b); /* XXX */
1266 memcpy(associd.bssid, bss->bssid, ETH_ALEN);
1267 return ar5523_cmd_write(ar, WDCMSG_WRITE_ASSOCID, &associd,
1268 sizeof(associd), 0);
1269}
1270
1271static void ar5523_bss_info_changed(struct ieee80211_hw *hw,
1272 struct ieee80211_vif *vif,
1273 struct ieee80211_bss_conf *bss,
1274 u32 changed)
1275{
1276 struct ar5523 *ar = hw->priv;
1277 int error;
1278
1279 ar5523_dbg(ar, "bss_info_changed called\n");
1280 mutex_lock(&ar->mutex);
1281
1282 if (!(changed & BSS_CHANGED_ASSOC))
1283 goto out_unlock;
1284
1285 if (bss->assoc) {
1286 error = ar5523_create_connection(ar, vif, bss);
1287 if (error) {
1288 ar5523_err(ar, "could not create connection\n");
1289 goto out_unlock;
1290 }
1291
1292 error = ar5523_set_basic_rates(ar, bss);
1293 if (error) {
1294 ar5523_err(ar, "could not set negotiated rate set\n");
1295 goto out_unlock;
1296 }
1297
1298 error = ar5523_write_associd(ar, bss);
1299 if (error) {
1300 ar5523_err(ar, "could not set association\n");
1301 goto out_unlock;
1302 }
1303
1304 /* turn link LED on */
1305 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_ON);
1306 set_bit(AR5523_CONNECTED, &ar->flags);
1307 ieee80211_queue_delayed_work(hw, &ar->stat_work, HZ);
1308
1309 } else {
1310 cancel_delayed_work(&ar->stat_work);
1311 clear_bit(AR5523_CONNECTED, &ar->flags);
1312 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1313 }
1314
1315out_unlock:
1316 mutex_unlock(&ar->mutex);
1317
1318}
1319
1320#define AR5523_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
1321 FIF_ALLMULTI | \
1322 FIF_FCSFAIL | \
1323 FIF_OTHER_BSS)
1324
1325static void ar5523_configure_filter(struct ieee80211_hw *hw,
1326 unsigned int changed_flags,
1327 unsigned int *total_flags,
1328 u64 multicast)
1329{
1330 struct ar5523 *ar = hw->priv;
1331 u32 filter = 0;
1332
1333 ar5523_dbg(ar, "configure_filter called\n");
1334 mutex_lock(&ar->mutex);
1335 ar5523_flush_tx(ar);
1336
1337 *total_flags &= AR5523_SUPPORTED_FILTERS;
1338
1339 /* The filters seems strange. UATH_FILTER_RX_BCAST and
1340 * UATH_FILTER_RX_MCAST does not result in those frames being RXed.
1341 * The only way I have found to get [mb]cast frames seems to be
1342 * to set UATH_FILTER_RX_PROM. */
1343 filter |= UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1344 UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON |
1345 UATH_FILTER_RX_PROM;
1346
1347 ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1348 ar5523_set_rxfilter(ar, filter, UATH_FILTER_OP_SET);
1349
1350 mutex_unlock(&ar->mutex);
1351}
1352
1353static const struct ieee80211_ops ar5523_ops = {
1354 .start = ar5523_start,
1355 .stop = ar5523_stop,
1356 .tx = ar5523_tx,
1357 .set_rts_threshold = ar5523_set_rts_threshold,
1358 .add_interface = ar5523_add_interface,
1359 .remove_interface = ar5523_remove_interface,
1360 .config = ar5523_hwconfig,
1361 .bss_info_changed = ar5523_bss_info_changed,
1362 .configure_filter = ar5523_configure_filter,
1363 .flush = ar5523_flush,
1364};
1365
1366static int ar5523_host_available(struct ar5523 *ar)
1367{
1368 struct ar5523_cmd_host_available setup;
1369
1370 /* inform target the host is available */
1371 setup.sw_ver_major = cpu_to_be32(ATH_SW_VER_MAJOR);
1372 setup.sw_ver_minor = cpu_to_be32(ATH_SW_VER_MINOR);
1373 setup.sw_ver_patch = cpu_to_be32(ATH_SW_VER_PATCH);
1374 setup.sw_ver_build = cpu_to_be32(ATH_SW_VER_BUILD);
1375 return ar5523_cmd_read(ar, WDCMSG_HOST_AVAILABLE,
1376 &setup, sizeof(setup), NULL, 0, 0);
1377}
1378
1379static int ar5523_get_devstatus(struct ar5523 *ar)
1380{
1381 u8 macaddr[ETH_ALEN];
1382 int error;
1383
1384 /* retrieve MAC address */
1385 error = ar5523_get_status(ar, ST_MAC_ADDR, macaddr, ETH_ALEN);
1386 if (error) {
1387 ar5523_err(ar, "could not read MAC address\n");
1388 return error;
1389 }
1390
1391 SET_IEEE80211_PERM_ADDR(ar->hw, macaddr);
1392
1393 error = ar5523_get_status(ar, ST_SERIAL_NUMBER,
1394 &ar->serial[0], sizeof(ar->serial));
1395 if (error) {
1396 ar5523_err(ar, "could not read device serial number\n");
1397 return error;
1398 }
1399 return 0;
1400}
1401
1402#define AR5523_SANE_RXBUFSZ 2000
1403
1404static int ar5523_get_max_rxsz(struct ar5523 *ar)
1405{
1406 int error;
1407 __be32 rxsize;
1408
1409 /* Get max rx size */
1410 error = ar5523_get_status(ar, ST_WDC_TRANSPORT_CHUNK_SIZE, &rxsize,
1411 sizeof(rxsize));
1412 if (error != 0) {
1413 ar5523_err(ar, "could not read max RX size\n");
1414 return error;
1415 }
1416
1417 ar->rxbufsz = be32_to_cpu(rxsize);
1418
1419 if (!ar->rxbufsz || ar->rxbufsz > AR5523_SANE_RXBUFSZ) {
1420 ar5523_err(ar, "Bad rxbufsz from device. Using %d instead\n",
1421 AR5523_SANE_RXBUFSZ);
1422 ar->rxbufsz = AR5523_SANE_RXBUFSZ;
1423 }
1424
1425 ar5523_dbg(ar, "Max RX buf size: %d\n", ar->rxbufsz);
1426 return 0;
1427}
1428
1429/*
1430 * This is copied from rtl818x, but we should probably move this
1431 * to common code as in OpenBSD.
1432 */
1433static const struct ieee80211_rate ar5523_rates[] = {
1434 { .bitrate = 10, .hw_value = 2, },
1435 { .bitrate = 20, .hw_value = 4 },
1436 { .bitrate = 55, .hw_value = 11, },
1437 { .bitrate = 110, .hw_value = 22, },
1438 { .bitrate = 60, .hw_value = 12, },
1439 { .bitrate = 90, .hw_value = 18, },
1440 { .bitrate = 120, .hw_value = 24, },
1441 { .bitrate = 180, .hw_value = 36, },
1442 { .bitrate = 240, .hw_value = 48, },
1443 { .bitrate = 360, .hw_value = 72, },
1444 { .bitrate = 480, .hw_value = 96, },
1445 { .bitrate = 540, .hw_value = 108, },
1446};
1447
1448static const struct ieee80211_channel ar5523_channels[] = {
1449 { .center_freq = 2412 },
1450 { .center_freq = 2417 },
1451 { .center_freq = 2422 },
1452 { .center_freq = 2427 },
1453 { .center_freq = 2432 },
1454 { .center_freq = 2437 },
1455 { .center_freq = 2442 },
1456 { .center_freq = 2447 },
1457 { .center_freq = 2452 },
1458 { .center_freq = 2457 },
1459 { .center_freq = 2462 },
1460 { .center_freq = 2467 },
1461 { .center_freq = 2472 },
1462 { .center_freq = 2484 },
1463};
1464
1465static int ar5523_init_modes(struct ar5523 *ar)
1466{
1467 BUILD_BUG_ON(sizeof(ar->channels) != sizeof(ar5523_channels));
1468 BUILD_BUG_ON(sizeof(ar->rates) != sizeof(ar5523_rates));
1469
1470 memcpy(ar->channels, ar5523_channels, sizeof(ar5523_channels));
1471 memcpy(ar->rates, ar5523_rates, sizeof(ar5523_rates));
1472
1473 ar->band.band = IEEE80211_BAND_2GHZ;
1474 ar->band.channels = ar->channels;
1475 ar->band.n_channels = ARRAY_SIZE(ar5523_channels);
1476 ar->band.bitrates = ar->rates;
1477 ar->band.n_bitrates = ARRAY_SIZE(ar5523_rates);
1478 ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar->band;
1479 return 0;
1480}
1481
1482/*
1483 * Load the MIPS R4000 microcode into the device. Once the image is loaded,
1484 * the device will detach itself from the bus and reattach later with a new
1485 * product Id (a la ezusb).
1486 */
1487static int ar5523_load_firmware(struct usb_device *dev)
1488{
1489 struct ar5523_fwblock *txblock, *rxblock;
1490 const struct firmware *fw;
1491 void *fwbuf;
1492 int len, offset;
1493 int foolen; /* XXX(hch): handle short transfers */
1494 int error = -ENXIO;
1495
1496 if (request_firmware(&fw, AR5523_FIRMWARE_FILE, &dev->dev)) {
1497 dev_err(&dev->dev, "no firmware found: %s\n",
1498 AR5523_FIRMWARE_FILE);
1499 return -ENOENT;
1500 }
1501
1502 txblock = kmalloc(sizeof(*txblock), GFP_KERNEL);
1503 if (!txblock)
1504 goto out;
1505
1506 rxblock = kmalloc(sizeof(*rxblock), GFP_KERNEL);
1507 if (!rxblock)
1508 goto out_free_txblock;
1509
1510 fwbuf = kmalloc(AR5523_MAX_FWBLOCK_SIZE, GFP_KERNEL);
1511 if (!fwbuf)
1512 goto out_free_rxblock;
1513
1514 memset(txblock, 0, sizeof(struct ar5523_fwblock));
1515 txblock->flags = cpu_to_be32(AR5523_WRITE_BLOCK);
1516 txblock->total = cpu_to_be32(fw->size);
1517
1518 offset = 0;
1519 len = fw->size;
1520 while (len > 0) {
1521 int mlen = min(len, AR5523_MAX_FWBLOCK_SIZE);
1522
1523 txblock->remain = cpu_to_be32(len - mlen);
1524 txblock->len = cpu_to_be32(mlen);
1525
1526 /* send firmware block meta-data */
1527 error = usb_bulk_msg(dev, ar5523_cmd_tx_pipe(dev),
1528 txblock, sizeof(*txblock), &foolen,
1529 AR5523_CMD_TIMEOUT);
1530 if (error) {
1531 dev_err(&dev->dev,
1532 "could not send firmware block info\n");
1533 goto out_free_fwbuf;
1534 }
1535
1536 /* send firmware block data */
1537 memcpy(fwbuf, fw->data + offset, mlen);
1538 error = usb_bulk_msg(dev, ar5523_data_tx_pipe(dev),
1539 fwbuf, mlen, &foolen,
1540 AR5523_DATA_TIMEOUT);
1541 if (error) {
1542 dev_err(&dev->dev,
1543 "could not send firmware block data\n");
1544 goto out_free_fwbuf;
1545 }
1546
1547 /* wait for ack from firmware */
1548 error = usb_bulk_msg(dev, ar5523_cmd_rx_pipe(dev),
1549 rxblock, sizeof(*rxblock), &foolen,
1550 AR5523_CMD_TIMEOUT);
1551 if (error) {
1552 dev_err(&dev->dev,
1553 "could not read firmware answer\n");
1554 goto out_free_fwbuf;
1555 }
1556
1557 len -= mlen;
1558 offset += mlen;
1559 }
1560
1561 /*
1562 * Set the error to -ENXIO to make sure we continue probing for
1563 * a driver.
1564 */
1565 error = -ENXIO;
1566
1567 out_free_fwbuf:
1568 kfree(fwbuf);
1569 out_free_rxblock:
1570 kfree(rxblock);
1571 out_free_txblock:
1572 kfree(txblock);
1573 out:
1574 release_firmware(fw);
1575 return error;
1576}
1577
1578static int ar5523_probe(struct usb_interface *intf,
1579 const struct usb_device_id *id)
1580{
1581 struct usb_device *dev = interface_to_usbdev(intf);
1582 struct ieee80211_hw *hw;
1583 struct ar5523 *ar;
1584 int error = -ENOMEM;
1585
1586 /*
1587 * Load firmware if the device requires it. This will return
1588 * -ENXIO on success and we'll get called back afer the usb
1589 * id changes to indicate that the firmware is present.
1590 */
1591 if (id->driver_info & AR5523_FLAG_PRE_FIRMWARE)
1592 return ar5523_load_firmware(dev);
1593
1594
1595 hw = ieee80211_alloc_hw(sizeof(*ar), &ar5523_ops);
1596 if (!hw)
1597 goto out;
1598 SET_IEEE80211_DEV(hw, &intf->dev);
1599
1600 ar = hw->priv;
1601 ar->hw = hw;
1602 ar->dev = dev;
1603 mutex_init(&ar->mutex);
1604
1605 INIT_DELAYED_WORK(&ar->stat_work, ar5523_stat_work);
1606 init_timer(&ar->tx_wd_timer);
1607 setup_timer(&ar->tx_wd_timer, ar5523_tx_wd_timer, (unsigned long) ar);
1608 INIT_WORK(&ar->tx_wd_work, ar5523_tx_wd_work);
1609 INIT_WORK(&ar->tx_work, ar5523_tx_work);
1610 INIT_LIST_HEAD(&ar->tx_queue_pending);
1611 INIT_LIST_HEAD(&ar->tx_queue_submitted);
1612 spin_lock_init(&ar->tx_data_list_lock);
1613 atomic_set(&ar->tx_nr_total, 0);
1614 atomic_set(&ar->tx_nr_pending, 0);
1615 init_waitqueue_head(&ar->tx_flush_waitq);
1616
1617 atomic_set(&ar->rx_data_free_cnt, 0);
1618 INIT_WORK(&ar->rx_refill_work, ar5523_rx_refill_work);
1619 INIT_LIST_HEAD(&ar->rx_data_free);
1620 INIT_LIST_HEAD(&ar->rx_data_used);
1621 spin_lock_init(&ar->rx_data_list_lock);
1622
1623 ar->wq = create_singlethread_workqueue("ar5523");
1624 if (!ar->wq) {
1625 ar5523_err(ar, "Could not create wq\n");
1626 goto out_free_ar;
1627 }
1628
1629 error = ar5523_alloc_rx_bufs(ar);
1630 if (error) {
1631 ar5523_err(ar, "Could not allocate rx buffers\n");
1632 goto out_free_wq;
1633 }
1634
1635 error = ar5523_alloc_rx_cmd(ar);
1636 if (error) {
1637 ar5523_err(ar, "Could not allocate rx command buffers\n");
1638 goto out_free_rx_bufs;
1639 }
1640
1641 error = ar5523_alloc_tx_cmd(ar);
1642 if (error) {
1643 ar5523_err(ar, "Could not allocate tx command buffers\n");
1644 goto out_free_rx_cmd;
1645 }
1646
1647 error = ar5523_submit_rx_cmd(ar);
1648 if (error) {
1649 ar5523_err(ar, "Failed to submit rx cmd\n");
1650 goto out_free_tx_cmd;
1651 }
1652
1653 /*
1654 * We're now ready to send/receive firmware commands.
1655 */
1656 error = ar5523_host_available(ar);
1657 if (error) {
1658 ar5523_err(ar, "could not initialize adapter\n");
1659 goto out_cancel_rx_cmd;
1660 }
1661
1662 error = ar5523_get_max_rxsz(ar);
1663 if (error) {
1664 ar5523_err(ar, "could not get caps from adapter\n");
1665 goto out_cancel_rx_cmd;
1666 }
1667
1668 error = ar5523_get_devcap(ar);
1669 if (error) {
1670 ar5523_err(ar, "could not get caps from adapter\n");
1671 goto out_cancel_rx_cmd;
1672 }
1673
1674 error = ar5523_get_devstatus(ar);
1675 if (error != 0) {
1676 ar5523_err(ar, "could not get device status\n");
1677 goto out_cancel_rx_cmd;
1678 }
1679
1680 ar5523_info(ar, "MAC/BBP AR5523, RF AR%c112\n",
1681 (id->driver_info & AR5523_FLAG_ABG) ? '5' : '2');
1682
1683 ar->vif = NULL;
1684 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
1685 IEEE80211_HW_SIGNAL_DBM |
1686 IEEE80211_HW_HAS_RATE_CONTROL;
1687 hw->extra_tx_headroom = sizeof(struct ar5523_tx_desc) +
1688 sizeof(struct ar5523_chunk);
1689 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1690 hw->queues = 1;
1691
1692 error = ar5523_init_modes(ar);
1693 if (error)
1694 goto out_cancel_rx_cmd;
1695
1696 usb_set_intfdata(intf, hw);
1697
1698 error = ieee80211_register_hw(hw);
1699 if (error) {
1700 ar5523_err(ar, "could not register device\n");
1701 goto out_cancel_rx_cmd;
1702 }
1703
1704 ar5523_info(ar, "Found and initialized AR5523 device\n");
1705 return 0;
1706
1707out_cancel_rx_cmd:
1708 ar5523_cancel_rx_cmd(ar);
1709out_free_tx_cmd:
1710 ar5523_free_tx_cmd(ar);
1711out_free_rx_cmd:
1712 ar5523_free_rx_cmd(ar);
1713out_free_rx_bufs:
1714 ar5523_free_rx_bufs(ar);
1715out_free_wq:
1716 destroy_workqueue(ar->wq);
1717out_free_ar:
1718 ieee80211_free_hw(hw);
1719out:
1720 return error;
1721}
1722
1723static void ar5523_disconnect(struct usb_interface *intf)
1724{
1725 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1726 struct ar5523 *ar = hw->priv;
1727
1728 ar5523_dbg(ar, "detaching\n");
1729 set_bit(AR5523_USB_DISCONNECTED, &ar->flags);
1730
1731 ieee80211_unregister_hw(hw);
1732
1733 ar5523_cancel_rx_cmd(ar);
1734 ar5523_free_tx_cmd(ar);
1735 ar5523_free_rx_cmd(ar);
1736 ar5523_free_rx_bufs(ar);
1737
1738 destroy_workqueue(ar->wq);
1739
1740 ieee80211_free_hw(hw);
1741 usb_set_intfdata(intf, NULL);
1742}
1743
1744#define AR5523_DEVICE_UG(vendor, device) \
1745 { USB_DEVICE((vendor), (device)) }, \
1746 { USB_DEVICE((vendor), (device) + 1), \
1747 .driver_info = AR5523_FLAG_PRE_FIRMWARE }
1748#define AR5523_DEVICE_UX(vendor, device) \
1749 { USB_DEVICE((vendor), (device)), \
1750 .driver_info = AR5523_FLAG_ABG }, \
1751 { USB_DEVICE((vendor), (device) + 1), \
1752 .driver_info = AR5523_FLAG_ABG|AR5523_FLAG_PRE_FIRMWARE }
1753
1754static struct usb_device_id ar5523_id_table[] = {
1755 AR5523_DEVICE_UG(0x168c, 0x0001), /* Atheros / AR5523 */
1756 AR5523_DEVICE_UG(0x0cf3, 0x0001), /* Atheros2 / AR5523_1 */
1757 AR5523_DEVICE_UG(0x0cf3, 0x0003), /* Atheros2 / AR5523_2 */
1758 AR5523_DEVICE_UX(0x0cf3, 0x0005), /* Atheros2 / AR5523_3 */
1759 AR5523_DEVICE_UG(0x0d8e, 0x7801), /* Conceptronic / AR5523_1 */
1760 AR5523_DEVICE_UX(0x0d8e, 0x7811), /* Conceptronic / AR5523_2 */
1761 AR5523_DEVICE_UX(0x2001, 0x3a00), /* Dlink / DWLAG132 */
1762 AR5523_DEVICE_UG(0x2001, 0x3a02), /* Dlink / DWLG132 */
1763 AR5523_DEVICE_UX(0x2001, 0x3a04), /* Dlink / DWLAG122 */
1764 AR5523_DEVICE_UG(0x07d1, 0x3a07), /* D-Link / WUA-2340 rev A1 */
1765 AR5523_DEVICE_UG(0x1690, 0x0712), /* Gigaset / AR5523 */
1766 AR5523_DEVICE_UG(0x1690, 0x0710), /* Gigaset / SMCWUSBTG */
1767 AR5523_DEVICE_UG(0x129b, 0x160b), /* Gigaset / USB stick 108
1768 (CyberTAN Technology) */
1769 AR5523_DEVICE_UG(0x16ab, 0x7801), /* Globalsun / AR5523_1 */
1770 AR5523_DEVICE_UX(0x16ab, 0x7811), /* Globalsun / AR5523_2 */
1771 AR5523_DEVICE_UG(0x0d8e, 0x7802), /* Globalsun / AR5523_3 */
1772 AR5523_DEVICE_UX(0x0846, 0x4300), /* Netgear / WG111U */
1773 AR5523_DEVICE_UG(0x0846, 0x4250), /* Netgear / WG111T */
1774 AR5523_DEVICE_UG(0x0846, 0x5f00), /* Netgear / WPN111 */
1775 AR5523_DEVICE_UG(0x157e, 0x3006), /* Umedia / AR5523_1 */
1776 AR5523_DEVICE_UX(0x157e, 0x3205), /* Umedia / AR5523_2 */
1777 AR5523_DEVICE_UG(0x157e, 0x3006), /* Umedia / TEW444UBEU */
1778 AR5523_DEVICE_UG(0x1435, 0x0826), /* Wistronneweb / AR5523_1 */
1779 AR5523_DEVICE_UX(0x1435, 0x0828), /* Wistronneweb / AR5523_2 */
1780 AR5523_DEVICE_UG(0x0cde, 0x0012), /* Zcom / AR5523 */
1781 AR5523_DEVICE_UG(0x1385, 0x4250), /* Netgear3 / WG111T (2) */
1782 AR5523_DEVICE_UG(0x1385, 0x5f00), /* Netgear / WPN111 */
1783 AR5523_DEVICE_UG(0x1385, 0x5f02), /* Netgear / WPN111 */
1784 { }
1785};
1786MODULE_DEVICE_TABLE(usb, ar5523_id_table);
1787
1788static struct usb_driver ar5523_driver = {
1789 .name = "ar5523",
1790 .id_table = ar5523_id_table,
1791 .probe = ar5523_probe,
1792 .disconnect = ar5523_disconnect,
1793};
1794
1795module_usb_driver(ar5523_driver);
1796
1797MODULE_LICENSE("Dual BSD/GPL");
1798MODULE_FIRMWARE(AR5523_FIRMWARE_FILE);