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
45 static int ar5523_submit_rx_cmd(struct ar5523 *ar);
46 static void ar5523_data_tx_pkt_put(struct ar5523 *ar);
47
ar5523_read_reply(struct ar5523 * ar,struct ar5523_cmd_hdr * hdr,struct ar5523_tx_cmd * cmd)48 static 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 too 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
88 out:
89 complete(&cmd->done);
90 }
91
ar5523_cmd_rx_cb(struct urb * urb)92 static 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 too 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 if (!cmd->odata) {
157 ar5523_err(ar, "Unexpected WDCMSG_TARGET_START reply");
158 return;
159 }
160 memcpy(cmd->odata, hdr + 1, sizeof(u32));
161 cmd->olen = sizeof(u32);
162 cmd->res = 0;
163 complete(&cmd->done);
164 break;
165
166 case WDCMSG_STATS_UPDATE:
167 ar5523_dbg(ar, "WDCMSG_STATS_UPDATE\n");
168 break;
169 }
170
171 skip:
172 ar5523_submit_rx_cmd(ar);
173 }
174
ar5523_alloc_rx_cmd(struct ar5523 * ar)175 static int ar5523_alloc_rx_cmd(struct ar5523 *ar)
176 {
177 ar->rx_cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
178 if (!ar->rx_cmd_urb)
179 return -ENOMEM;
180
181 ar->rx_cmd_buf = usb_alloc_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
182 GFP_KERNEL,
183 &ar->rx_cmd_urb->transfer_dma);
184 if (!ar->rx_cmd_buf) {
185 usb_free_urb(ar->rx_cmd_urb);
186 return -ENOMEM;
187 }
188 return 0;
189 }
190
ar5523_cancel_rx_cmd(struct ar5523 * ar)191 static void ar5523_cancel_rx_cmd(struct ar5523 *ar)
192 {
193 usb_kill_urb(ar->rx_cmd_urb);
194 }
195
ar5523_free_rx_cmd(struct ar5523 * ar)196 static void ar5523_free_rx_cmd(struct ar5523 *ar)
197 {
198 usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
199 ar->rx_cmd_buf, ar->rx_cmd_urb->transfer_dma);
200 usb_free_urb(ar->rx_cmd_urb);
201 }
202
ar5523_submit_rx_cmd(struct ar5523 * ar)203 static int ar5523_submit_rx_cmd(struct ar5523 *ar)
204 {
205 int error;
206
207 usb_fill_bulk_urb(ar->rx_cmd_urb, ar->dev,
208 ar5523_cmd_rx_pipe(ar->dev), ar->rx_cmd_buf,
209 AR5523_MAX_RXCMDSZ, ar5523_cmd_rx_cb, ar);
210 ar->rx_cmd_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
211
212 error = usb_submit_urb(ar->rx_cmd_urb, GFP_ATOMIC);
213 if (error) {
214 if (error != -ENODEV)
215 ar5523_err(ar, "error %d when submitting rx urb\n",
216 error);
217 return error;
218 }
219 return 0;
220 }
221
222 /*
223 * Command submitted cb
224 */
ar5523_cmd_tx_cb(struct urb * urb)225 static void ar5523_cmd_tx_cb(struct urb *urb)
226 {
227 struct ar5523_tx_cmd *cmd = urb->context;
228 struct ar5523 *ar = cmd->ar;
229
230 if (urb->status) {
231 ar5523_err(ar, "Failed to TX command. Status = %d\n",
232 urb->status);
233 cmd->res = urb->status;
234 complete(&cmd->done);
235 return;
236 }
237
238 if (!(cmd->flags & AR5523_CMD_FLAG_READ)) {
239 cmd->res = 0;
240 complete(&cmd->done);
241 }
242 }
243
ar5523_cmd(struct ar5523 * ar,u32 code,const void * idata,int ilen,void * odata,int olen,int flags)244 static int ar5523_cmd(struct ar5523 *ar, u32 code, const void *idata,
245 int ilen, void *odata, int olen, int flags)
246 {
247 struct ar5523_cmd_hdr *hdr;
248 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
249 int xferlen, error;
250
251 /* always bulk-out a multiple of 4 bytes */
252 xferlen = (sizeof(struct ar5523_cmd_hdr) + ilen + 3) & ~3;
253
254 hdr = (struct ar5523_cmd_hdr *)cmd->buf_tx;
255 memset(hdr, 0, sizeof(struct ar5523_cmd_hdr));
256 hdr->len = cpu_to_be32(xferlen);
257 hdr->code = cpu_to_be32(code);
258 hdr->priv = AR5523_CMD_ID;
259
260 if (flags & AR5523_CMD_FLAG_MAGIC)
261 hdr->magic = cpu_to_be32(1 << 24);
262 if (ilen)
263 memcpy(hdr + 1, idata, ilen);
264
265 cmd->odata = odata;
266 cmd->olen = olen;
267 cmd->flags = flags;
268
269 ar5523_dbg(ar, "do cmd %02x\n", code);
270
271 usb_fill_bulk_urb(cmd->urb_tx, ar->dev, ar5523_cmd_tx_pipe(ar->dev),
272 cmd->buf_tx, xferlen, ar5523_cmd_tx_cb, cmd);
273 cmd->urb_tx->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
274
275 error = usb_submit_urb(cmd->urb_tx, GFP_KERNEL);
276 if (error) {
277 ar5523_err(ar, "could not send command 0x%x, error=%d\n",
278 code, error);
279 return error;
280 }
281
282 if (!wait_for_completion_timeout(&cmd->done, 2 * HZ)) {
283 cmd->odata = NULL;
284 ar5523_err(ar, "timeout waiting for command %02x reply\n",
285 code);
286 cmd->res = -ETIMEDOUT;
287 }
288 return cmd->res;
289 }
290
ar5523_cmd_write(struct ar5523 * ar,u32 code,const void * data,int len,int flags)291 static int ar5523_cmd_write(struct ar5523 *ar, u32 code, const void *data,
292 int len, int flags)
293 {
294 flags &= ~AR5523_CMD_FLAG_READ;
295 return ar5523_cmd(ar, code, data, len, NULL, 0, flags);
296 }
297
ar5523_cmd_read(struct ar5523 * ar,u32 code,const void * idata,int ilen,void * odata,int olen,int flags)298 static int ar5523_cmd_read(struct ar5523 *ar, u32 code, const void *idata,
299 int ilen, void *odata, int olen, int flags)
300 {
301 flags |= AR5523_CMD_FLAG_READ;
302 return ar5523_cmd(ar, code, idata, ilen, odata, olen, flags);
303 }
304
ar5523_config(struct ar5523 * ar,u32 reg,u32 val)305 static int ar5523_config(struct ar5523 *ar, u32 reg, u32 val)
306 {
307 struct ar5523_write_mac write;
308 int error;
309
310 write.reg = cpu_to_be32(reg);
311 write.len = cpu_to_be32(0); /* 0 = single write */
312 *(__be32 *)write.data = cpu_to_be32(val);
313
314 error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
315 3 * sizeof(u32), 0);
316 if (error != 0)
317 ar5523_err(ar, "could not write register 0x%02x\n", reg);
318 return error;
319 }
320
ar5523_config_multi(struct ar5523 * ar,u32 reg,const void * data,int len)321 static int ar5523_config_multi(struct ar5523 *ar, u32 reg, const void *data,
322 int len)
323 {
324 struct ar5523_write_mac write;
325 int error;
326
327 write.reg = cpu_to_be32(reg);
328 write.len = cpu_to_be32(len);
329 memcpy(write.data, data, len);
330
331 /* properly handle the case where len is zero (reset) */
332 error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
333 (len == 0) ? sizeof(u32) : 2 * sizeof(u32) + len, 0);
334 if (error != 0)
335 ar5523_err(ar, "could not write %d bytes to register 0x%02x\n",
336 len, reg);
337 return error;
338 }
339
ar5523_get_status(struct ar5523 * ar,u32 which,void * odata,int olen)340 static int ar5523_get_status(struct ar5523 *ar, u32 which, void *odata,
341 int olen)
342 {
343 int error;
344 __be32 which_be;
345
346 which_be = cpu_to_be32(which);
347 error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_STATUS,
348 &which_be, sizeof(which_be), odata, olen, AR5523_CMD_FLAG_MAGIC);
349 if (error != 0)
350 ar5523_err(ar, "could not read EEPROM offset 0x%02x\n", which);
351 return error;
352 }
353
ar5523_get_capability(struct ar5523 * ar,u32 cap,u32 * val)354 static int ar5523_get_capability(struct ar5523 *ar, u32 cap, u32 *val)
355 {
356 int error;
357 __be32 cap_be, val_be;
358
359 cap_be = cpu_to_be32(cap);
360 error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_CAPABILITY, &cap_be,
361 sizeof(cap_be), &val_be, sizeof(__be32),
362 AR5523_CMD_FLAG_MAGIC);
363 if (error != 0) {
364 ar5523_err(ar, "could not read capability %u\n", cap);
365 return error;
366 }
367 *val = be32_to_cpu(val_be);
368 return error;
369 }
370
ar5523_get_devcap(struct ar5523 * ar)371 static int ar5523_get_devcap(struct ar5523 *ar)
372 {
373 #define GETCAP(x) do { \
374 error = ar5523_get_capability(ar, x, &cap); \
375 if (error != 0) \
376 return error; \
377 ar5523_info(ar, "Cap: " \
378 "%s=0x%08x\n", #x, cap); \
379 } while (0)
380 int error;
381 u32 cap;
382
383 /* collect device capabilities */
384 GETCAP(CAP_TARGET_VERSION);
385 GETCAP(CAP_TARGET_REVISION);
386 GETCAP(CAP_MAC_VERSION);
387 GETCAP(CAP_MAC_REVISION);
388 GETCAP(CAP_PHY_REVISION);
389 GETCAP(CAP_ANALOG_5GHz_REVISION);
390 GETCAP(CAP_ANALOG_2GHz_REVISION);
391
392 GETCAP(CAP_REG_DOMAIN);
393 GETCAP(CAP_REG_CAP_BITS);
394 GETCAP(CAP_WIRELESS_MODES);
395 GETCAP(CAP_CHAN_SPREAD_SUPPORT);
396 GETCAP(CAP_COMPRESS_SUPPORT);
397 GETCAP(CAP_BURST_SUPPORT);
398 GETCAP(CAP_FAST_FRAMES_SUPPORT);
399 GETCAP(CAP_CHAP_TUNING_SUPPORT);
400 GETCAP(CAP_TURBOG_SUPPORT);
401 GETCAP(CAP_TURBO_PRIME_SUPPORT);
402 GETCAP(CAP_DEVICE_TYPE);
403 GETCAP(CAP_WME_SUPPORT);
404 GETCAP(CAP_TOTAL_QUEUES);
405 GETCAP(CAP_CONNECTION_ID_MAX);
406
407 GETCAP(CAP_LOW_5GHZ_CHAN);
408 GETCAP(CAP_HIGH_5GHZ_CHAN);
409 GETCAP(CAP_LOW_2GHZ_CHAN);
410 GETCAP(CAP_HIGH_2GHZ_CHAN);
411 GETCAP(CAP_TWICE_ANTENNAGAIN_5G);
412 GETCAP(CAP_TWICE_ANTENNAGAIN_2G);
413
414 GETCAP(CAP_CIPHER_AES_CCM);
415 GETCAP(CAP_CIPHER_TKIP);
416 GETCAP(CAP_MIC_TKIP);
417 return 0;
418 }
419
ar5523_set_ledsteady(struct ar5523 * ar,int lednum,int ledmode)420 static int ar5523_set_ledsteady(struct ar5523 *ar, int lednum, int ledmode)
421 {
422 struct ar5523_cmd_ledsteady led;
423
424 led.lednum = cpu_to_be32(lednum);
425 led.ledmode = cpu_to_be32(ledmode);
426
427 ar5523_dbg(ar, "set %s led %s (steady)\n",
428 (lednum == UATH_LED_LINK) ? "link" : "activity",
429 ledmode ? "on" : "off");
430 return ar5523_cmd_write(ar, WDCMSG_SET_LED_STEADY, &led, sizeof(led),
431 0);
432 }
433
ar5523_set_rxfilter(struct ar5523 * ar,u32 bits,u32 op)434 static int ar5523_set_rxfilter(struct ar5523 *ar, u32 bits, u32 op)
435 {
436 struct ar5523_cmd_rx_filter rxfilter;
437
438 rxfilter.bits = cpu_to_be32(bits);
439 rxfilter.op = cpu_to_be32(op);
440
441 ar5523_dbg(ar, "setting Rx filter=0x%x flags=0x%x\n", bits, op);
442 return ar5523_cmd_write(ar, WDCMSG_RX_FILTER, &rxfilter,
443 sizeof(rxfilter), 0);
444 }
445
ar5523_reset_tx_queues(struct ar5523 * ar)446 static int ar5523_reset_tx_queues(struct ar5523 *ar)
447 {
448 __be32 qid = cpu_to_be32(0);
449
450 ar5523_dbg(ar, "resetting Tx queue\n");
451 return ar5523_cmd_write(ar, WDCMSG_RELEASE_TX_QUEUE,
452 &qid, sizeof(qid), 0);
453 }
454
ar5523_set_chan(struct ar5523 * ar)455 static int ar5523_set_chan(struct ar5523 *ar)
456 {
457 struct ieee80211_conf *conf = &ar->hw->conf;
458
459 struct ar5523_cmd_reset reset;
460
461 memset(&reset, 0, sizeof(reset));
462 reset.flags |= cpu_to_be32(UATH_CHAN_2GHZ);
463 reset.flags |= cpu_to_be32(UATH_CHAN_OFDM);
464 reset.freq = cpu_to_be32(conf->chandef.chan->center_freq);
465 reset.maxrdpower = cpu_to_be32(50); /* XXX */
466 reset.channelchange = cpu_to_be32(1);
467 reset.keeprccontent = cpu_to_be32(0);
468
469 ar5523_dbg(ar, "set chan flags 0x%x freq %d\n",
470 be32_to_cpu(reset.flags),
471 conf->chandef.chan->center_freq);
472 return ar5523_cmd_write(ar, WDCMSG_RESET, &reset, sizeof(reset), 0);
473 }
474
ar5523_queue_init(struct ar5523 * ar)475 static int ar5523_queue_init(struct ar5523 *ar)
476 {
477 struct ar5523_cmd_txq_setup qinfo;
478
479 ar5523_dbg(ar, "setting up Tx queue\n");
480 qinfo.qid = cpu_to_be32(0);
481 qinfo.len = cpu_to_be32(sizeof(qinfo.attr));
482 qinfo.attr.priority = cpu_to_be32(0); /* XXX */
483 qinfo.attr.aifs = cpu_to_be32(3);
484 qinfo.attr.logcwmin = cpu_to_be32(4);
485 qinfo.attr.logcwmax = cpu_to_be32(10);
486 qinfo.attr.bursttime = cpu_to_be32(0);
487 qinfo.attr.mode = cpu_to_be32(0);
488 qinfo.attr.qflags = cpu_to_be32(1); /* XXX? */
489 return ar5523_cmd_write(ar, WDCMSG_SETUP_TX_QUEUE, &qinfo,
490 sizeof(qinfo), 0);
491 }
492
ar5523_switch_chan(struct ar5523 * ar)493 static int ar5523_switch_chan(struct ar5523 *ar)
494 {
495 int error;
496
497 error = ar5523_set_chan(ar);
498 if (error) {
499 ar5523_err(ar, "could not set chan, error %d\n", error);
500 goto out_err;
501 }
502
503 /* reset Tx rings */
504 error = ar5523_reset_tx_queues(ar);
505 if (error) {
506 ar5523_err(ar, "could not reset Tx queues, error %d\n",
507 error);
508 goto out_err;
509 }
510 /* set Tx rings WME properties */
511 error = ar5523_queue_init(ar);
512 if (error)
513 ar5523_err(ar, "could not init wme, error %d\n", error);
514
515 out_err:
516 return error;
517 }
518
ar5523_rx_data_put(struct ar5523 * ar,struct ar5523_rx_data * data)519 static void ar5523_rx_data_put(struct ar5523 *ar,
520 struct ar5523_rx_data *data)
521 {
522 unsigned long flags;
523 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
524 list_move(&data->list, &ar->rx_data_free);
525 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
526 }
527
ar5523_data_rx_cb(struct urb * urb)528 static void ar5523_data_rx_cb(struct urb *urb)
529 {
530 struct ar5523_rx_data *data = urb->context;
531 struct ar5523 *ar = data->ar;
532 struct ar5523_rx_desc *desc;
533 struct ar5523_chunk *chunk;
534 struct ieee80211_hw *hw = ar->hw;
535 struct ieee80211_rx_status *rx_status;
536 u32 rxlen;
537 int usblen = urb->actual_length;
538 int hdrlen, pad;
539
540 ar5523_dbg(ar, "%s\n", __func__);
541 /* sync/async unlink faults aren't errors */
542 if (urb->status) {
543 if (urb->status != -ESHUTDOWN)
544 ar5523_err(ar, "%s: USB err: %d\n", __func__,
545 urb->status);
546 goto skip;
547 }
548
549 if (usblen < AR5523_MIN_RXBUFSZ) {
550 ar5523_err(ar, "RX: wrong xfer size (usblen=%d)\n", usblen);
551 goto skip;
552 }
553
554 chunk = (struct ar5523_chunk *) data->skb->data;
555
556 if (((chunk->flags & UATH_CFLAGS_FINAL) == 0) ||
557 chunk->seqnum != 0) {
558 ar5523_dbg(ar, "RX: No final flag. s: %d f: %02x l: %d\n",
559 chunk->seqnum, chunk->flags,
560 be16_to_cpu(chunk->length));
561 goto skip;
562 }
563
564 /* Rx descriptor is located at the end, 32-bit aligned */
565 desc = (struct ar5523_rx_desc *)
566 (data->skb->data + usblen - sizeof(struct ar5523_rx_desc));
567
568 rxlen = be32_to_cpu(desc->len);
569 if (rxlen > ar->rxbufsz) {
570 ar5523_dbg(ar, "RX: Bad descriptor (len=%d)\n",
571 be32_to_cpu(desc->len));
572 goto skip;
573 }
574
575 if (!rxlen) {
576 ar5523_dbg(ar, "RX: rxlen is 0\n");
577 goto skip;
578 }
579
580 if (be32_to_cpu(desc->status) != 0) {
581 ar5523_dbg(ar, "Bad RX status (0x%x len = %d). Skip\n",
582 be32_to_cpu(desc->status), be32_to_cpu(desc->len));
583 goto skip;
584 }
585
586 skb_reserve(data->skb, sizeof(*chunk));
587 skb_put(data->skb, rxlen - sizeof(struct ar5523_rx_desc));
588
589 hdrlen = ieee80211_get_hdrlen_from_skb(data->skb);
590 if (!IS_ALIGNED(hdrlen, 4)) {
591 ar5523_dbg(ar, "eek, alignment workaround activated\n");
592 pad = ALIGN(hdrlen, 4) - hdrlen;
593 memmove(data->skb->data + pad, data->skb->data, hdrlen);
594 skb_pull(data->skb, pad);
595 skb_put(data->skb, pad);
596 }
597
598 rx_status = IEEE80211_SKB_RXCB(data->skb);
599 memset(rx_status, 0, sizeof(*rx_status));
600 rx_status->freq = be32_to_cpu(desc->channel);
601 rx_status->band = hw->conf.chandef.chan->band;
602 rx_status->signal = -95 + be32_to_cpu(desc->rssi);
603
604 ieee80211_rx_irqsafe(hw, data->skb);
605 data->skb = NULL;
606
607 skip:
608 if (data->skb) {
609 dev_kfree_skb_irq(data->skb);
610 data->skb = NULL;
611 }
612
613 ar5523_rx_data_put(ar, data);
614 if (atomic_inc_return(&ar->rx_data_free_cnt) >=
615 AR5523_RX_DATA_REFILL_COUNT &&
616 test_bit(AR5523_HW_UP, &ar->flags))
617 queue_work(ar->wq, &ar->rx_refill_work);
618 }
619
ar5523_rx_refill_work(struct work_struct * work)620 static void ar5523_rx_refill_work(struct work_struct *work)
621 {
622 struct ar5523 *ar = container_of(work, struct ar5523, rx_refill_work);
623 struct ar5523_rx_data *data;
624 unsigned long flags;
625 int error;
626
627 ar5523_dbg(ar, "%s\n", __func__);
628 do {
629 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
630
631 if (!list_empty(&ar->rx_data_free))
632 data = (struct ar5523_rx_data *) ar->rx_data_free.next;
633 else
634 data = NULL;
635 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
636
637 if (!data)
638 goto done;
639
640 data->skb = alloc_skb(ar->rxbufsz, GFP_KERNEL);
641 if (!data->skb) {
642 ar5523_err(ar, "could not allocate rx skbuff\n");
643 return;
644 }
645
646 usb_fill_bulk_urb(data->urb, ar->dev,
647 ar5523_data_rx_pipe(ar->dev), data->skb->data,
648 ar->rxbufsz, ar5523_data_rx_cb, data);
649
650 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
651 list_move(&data->list, &ar->rx_data_used);
652 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
653 atomic_dec(&ar->rx_data_free_cnt);
654
655 error = usb_submit_urb(data->urb, GFP_KERNEL);
656 if (error) {
657 kfree_skb(data->skb);
658 if (error != -ENODEV)
659 ar5523_err(ar, "Err sending rx data urb %d\n",
660 error);
661 ar5523_rx_data_put(ar, data);
662 atomic_inc(&ar->rx_data_free_cnt);
663 return;
664 }
665
666 } while (true);
667 done:
668 return;
669 }
670
ar5523_cancel_rx_bufs(struct ar5523 * ar)671 static void ar5523_cancel_rx_bufs(struct ar5523 *ar)
672 {
673 struct ar5523_rx_data *data;
674 unsigned long flags;
675
676 do {
677 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
678 if (!list_empty(&ar->rx_data_used))
679 data = (struct ar5523_rx_data *) ar->rx_data_used.next;
680 else
681 data = NULL;
682 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
683
684 if (!data)
685 break;
686
687 usb_kill_urb(data->urb);
688 list_move(&data->list, &ar->rx_data_free);
689 atomic_inc(&ar->rx_data_free_cnt);
690 } while (data);
691 }
692
ar5523_free_rx_bufs(struct ar5523 * ar)693 static void ar5523_free_rx_bufs(struct ar5523 *ar)
694 {
695 struct ar5523_rx_data *data;
696
697 ar5523_cancel_rx_bufs(ar);
698 while (!list_empty(&ar->rx_data_free)) {
699 data = (struct ar5523_rx_data *) ar->rx_data_free.next;
700 list_del(&data->list);
701 usb_free_urb(data->urb);
702 }
703 }
704
ar5523_alloc_rx_bufs(struct ar5523 * ar)705 static int ar5523_alloc_rx_bufs(struct ar5523 *ar)
706 {
707 int i;
708
709 for (i = 0; i < AR5523_RX_DATA_COUNT; i++) {
710 struct ar5523_rx_data *data = &ar->rx_data[i];
711
712 data->ar = ar;
713 data->urb = usb_alloc_urb(0, GFP_KERNEL);
714 if (!data->urb)
715 goto err;
716 list_add_tail(&data->list, &ar->rx_data_free);
717 atomic_inc(&ar->rx_data_free_cnt);
718 }
719 return 0;
720
721 err:
722 ar5523_free_rx_bufs(ar);
723 return -ENOMEM;
724 }
725
ar5523_data_tx_pkt_put(struct ar5523 * ar)726 static void ar5523_data_tx_pkt_put(struct ar5523 *ar)
727 {
728 atomic_dec(&ar->tx_nr_total);
729 if (!atomic_dec_return(&ar->tx_nr_pending)) {
730 del_timer(&ar->tx_wd_timer);
731 wake_up(&ar->tx_flush_waitq);
732 }
733
734 if (atomic_read(&ar->tx_nr_total) < AR5523_TX_DATA_RESTART_COUNT) {
735 ar5523_dbg(ar, "restart tx queue\n");
736 ieee80211_wake_queues(ar->hw);
737 }
738 }
739
ar5523_data_tx_cb(struct urb * urb)740 static void ar5523_data_tx_cb(struct urb *urb)
741 {
742 struct sk_buff *skb = urb->context;
743 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
744 struct ar5523_tx_data *data = (struct ar5523_tx_data *)
745 txi->driver_data;
746 struct ar5523 *ar = data->ar;
747 unsigned long flags;
748
749 ar5523_dbg(ar, "data tx urb completed: %d\n", urb->status);
750
751 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
752 list_del(&data->list);
753 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
754
755 if (urb->status) {
756 ar5523_dbg(ar, "%s: urb status: %d\n", __func__, urb->status);
757 ar5523_data_tx_pkt_put(ar);
758 ieee80211_free_txskb(ar->hw, skb);
759 } else {
760 skb_pull(skb, sizeof(struct ar5523_tx_desc) + sizeof(__be32));
761 ieee80211_tx_status_irqsafe(ar->hw, skb);
762 }
763 usb_free_urb(urb);
764 }
765
ar5523_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)766 static void ar5523_tx(struct ieee80211_hw *hw,
767 struct ieee80211_tx_control *control,
768 struct sk_buff *skb)
769 {
770 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
771 struct ar5523_tx_data *data = (struct ar5523_tx_data *)
772 txi->driver_data;
773 struct ar5523 *ar = hw->priv;
774 unsigned long flags;
775
776 ar5523_dbg(ar, "tx called\n");
777 if (atomic_inc_return(&ar->tx_nr_total) >= AR5523_TX_DATA_COUNT) {
778 ar5523_dbg(ar, "tx queue full\n");
779 ar5523_dbg(ar, "stop queues (tot %d pend %d)\n",
780 atomic_read(&ar->tx_nr_total),
781 atomic_read(&ar->tx_nr_pending));
782 ieee80211_stop_queues(hw);
783 }
784
785 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
786 list_add_tail(&data->list, &ar->tx_queue_pending);
787 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
788
789 ieee80211_queue_work(ar->hw, &ar->tx_work);
790 }
791
ar5523_tx_work_locked(struct ar5523 * ar)792 static void ar5523_tx_work_locked(struct ar5523 *ar)
793 {
794 struct ar5523_tx_data *data;
795 struct ar5523_tx_desc *desc;
796 struct ar5523_chunk *chunk;
797 struct ieee80211_tx_info *txi;
798 struct urb *urb;
799 struct sk_buff *skb;
800 int error = 0, paylen;
801 u32 txqid;
802 unsigned long flags;
803
804 BUILD_BUG_ON(sizeof(struct ar5523_tx_data) >
805 IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
806
807 ar5523_dbg(ar, "%s\n", __func__);
808 do {
809 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
810 if (!list_empty(&ar->tx_queue_pending)) {
811 data = (struct ar5523_tx_data *)
812 ar->tx_queue_pending.next;
813 list_del(&data->list);
814 } else
815 data = NULL;
816 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
817
818 if (!data)
819 break;
820
821 txi = container_of((void *)data, struct ieee80211_tx_info,
822 driver_data);
823 txqid = 0;
824
825 skb = container_of((void *)txi, struct sk_buff, cb);
826 paylen = skb->len;
827
828 urb = usb_alloc_urb(0, GFP_KERNEL);
829 if (!urb) {
830 ieee80211_free_txskb(ar->hw, skb);
831 continue;
832 }
833
834 data->ar = ar;
835 data->urb = urb;
836
837 desc = skb_push(skb, sizeof(*desc));
838 chunk = skb_push(skb, sizeof(*chunk));
839
840 chunk->seqnum = 0;
841 chunk->flags = UATH_CFLAGS_FINAL;
842 chunk->length = cpu_to_be16(skb->len);
843
844 desc->msglen = cpu_to_be32(skb->len);
845 desc->msgid = AR5523_DATA_ID;
846 desc->buflen = cpu_to_be32(paylen);
847 desc->type = cpu_to_be32(WDCMSG_SEND);
848 desc->flags = cpu_to_be32(UATH_TX_NOTIFY);
849
850 if (test_bit(AR5523_CONNECTED, &ar->flags))
851 desc->connid = cpu_to_be32(AR5523_ID_BSS);
852 else
853 desc->connid = cpu_to_be32(AR5523_ID_BROADCAST);
854
855 if (txi->flags & IEEE80211_TX_CTL_USE_MINRATE)
856 txqid |= UATH_TXQID_MINRATE;
857
858 desc->txqid = cpu_to_be32(txqid);
859
860 urb->transfer_flags = URB_ZERO_PACKET;
861 usb_fill_bulk_urb(urb, ar->dev, ar5523_data_tx_pipe(ar->dev),
862 skb->data, skb->len, ar5523_data_tx_cb, skb);
863
864 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
865 list_add_tail(&data->list, &ar->tx_queue_submitted);
866 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
867 mod_timer(&ar->tx_wd_timer, jiffies + AR5523_TX_WD_TIMEOUT);
868 atomic_inc(&ar->tx_nr_pending);
869
870 ar5523_dbg(ar, "TX Frame (%d pending)\n",
871 atomic_read(&ar->tx_nr_pending));
872 error = usb_submit_urb(urb, GFP_KERNEL);
873 if (error) {
874 ar5523_err(ar, "error %d when submitting tx urb\n",
875 error);
876 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
877 list_del(&data->list);
878 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
879 atomic_dec(&ar->tx_nr_pending);
880 ar5523_data_tx_pkt_put(ar);
881 usb_free_urb(urb);
882 ieee80211_free_txskb(ar->hw, skb);
883 }
884 } while (true);
885 }
886
ar5523_tx_work(struct work_struct * work)887 static void ar5523_tx_work(struct work_struct *work)
888 {
889 struct ar5523 *ar = container_of(work, struct ar5523, tx_work);
890
891 ar5523_dbg(ar, "%s\n", __func__);
892 mutex_lock(&ar->mutex);
893 ar5523_tx_work_locked(ar);
894 mutex_unlock(&ar->mutex);
895 }
896
ar5523_tx_wd_timer(struct timer_list * t)897 static void ar5523_tx_wd_timer(struct timer_list *t)
898 {
899 struct ar5523 *ar = from_timer(ar, t, tx_wd_timer);
900
901 ar5523_dbg(ar, "TX watchdog timer triggered\n");
902 ieee80211_queue_work(ar->hw, &ar->tx_wd_work);
903 }
904
ar5523_tx_wd_work(struct work_struct * work)905 static void ar5523_tx_wd_work(struct work_struct *work)
906 {
907 struct ar5523 *ar = container_of(work, struct ar5523, tx_wd_work);
908
909 /* Occasionally the TX queues stop responding. The only way to
910 * recover seems to be to reset the dongle.
911 */
912
913 mutex_lock(&ar->mutex);
914 ar5523_err(ar, "TX queue stuck (tot %d pend %d)\n",
915 atomic_read(&ar->tx_nr_total),
916 atomic_read(&ar->tx_nr_pending));
917
918 ar5523_err(ar, "Will restart dongle.\n");
919 ar5523_cmd_write(ar, WDCMSG_TARGET_RESET, NULL, 0, 0);
920 mutex_unlock(&ar->mutex);
921 }
922
ar5523_flush_tx(struct ar5523 * ar)923 static void ar5523_flush_tx(struct ar5523 *ar)
924 {
925 ar5523_tx_work_locked(ar);
926
927 /* Don't waste time trying to flush if USB is disconnected */
928 if (test_bit(AR5523_USB_DISCONNECTED, &ar->flags))
929 return;
930 if (!wait_event_timeout(ar->tx_flush_waitq,
931 !atomic_read(&ar->tx_nr_pending), AR5523_FLUSH_TIMEOUT))
932 ar5523_err(ar, "flush timeout (tot %d pend %d)\n",
933 atomic_read(&ar->tx_nr_total),
934 atomic_read(&ar->tx_nr_pending));
935 }
936
ar5523_free_tx_cmd(struct ar5523 * ar)937 static void ar5523_free_tx_cmd(struct ar5523 *ar)
938 {
939 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
940
941 usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ, cmd->buf_tx,
942 cmd->urb_tx->transfer_dma);
943 usb_free_urb(cmd->urb_tx);
944 }
945
ar5523_alloc_tx_cmd(struct ar5523 * ar)946 static int ar5523_alloc_tx_cmd(struct ar5523 *ar)
947 {
948 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
949
950 cmd->ar = ar;
951 init_completion(&cmd->done);
952
953 cmd->urb_tx = usb_alloc_urb(0, GFP_KERNEL);
954 if (!cmd->urb_tx)
955 return -ENOMEM;
956 cmd->buf_tx = usb_alloc_coherent(ar->dev, AR5523_MAX_TXCMDSZ,
957 GFP_KERNEL,
958 &cmd->urb_tx->transfer_dma);
959 if (!cmd->buf_tx) {
960 usb_free_urb(cmd->urb_tx);
961 return -ENOMEM;
962 }
963 return 0;
964 }
965
966 /*
967 * This function is called periodically (every second) when associated to
968 * query device statistics.
969 */
ar5523_stat_work(struct work_struct * work)970 static void ar5523_stat_work(struct work_struct *work)
971 {
972 struct ar5523 *ar = container_of(work, struct ar5523, stat_work.work);
973 int error;
974
975 ar5523_dbg(ar, "%s\n", __func__);
976 mutex_lock(&ar->mutex);
977
978 /*
979 * Send request for statistics asynchronously once a second. This
980 * seems to be important. Throughput is a lot better if this is done.
981 */
982 error = ar5523_cmd_write(ar, WDCMSG_TARGET_GET_STATS, NULL, 0, 0);
983 if (error)
984 ar5523_err(ar, "could not query stats, error %d\n", error);
985 mutex_unlock(&ar->mutex);
986 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, HZ);
987 }
988
989 /*
990 * Interface routines to the mac80211 stack.
991 */
ar5523_start(struct ieee80211_hw * hw)992 static int ar5523_start(struct ieee80211_hw *hw)
993 {
994 struct ar5523 *ar = hw->priv;
995 int error;
996 __be32 val;
997
998 ar5523_dbg(ar, "start called\n");
999
1000 mutex_lock(&ar->mutex);
1001 val = cpu_to_be32(0);
1002 ar5523_cmd_write(ar, WDCMSG_BIND, &val, sizeof(val), 0);
1003
1004 /* set MAC address */
1005 ar5523_config_multi(ar, CFG_MAC_ADDR, &ar->hw->wiphy->perm_addr,
1006 ETH_ALEN);
1007
1008 /* XXX honor net80211 state */
1009 ar5523_config(ar, CFG_RATE_CONTROL_ENABLE, 0x00000001);
1010 ar5523_config(ar, CFG_DIVERSITY_CTL, 0x00000001);
1011 ar5523_config(ar, CFG_ABOLT, 0x0000003f);
1012 ar5523_config(ar, CFG_WME_ENABLED, 0x00000000);
1013
1014 ar5523_config(ar, CFG_SERVICE_TYPE, 1);
1015 ar5523_config(ar, CFG_TP_SCALE, 0x00000000);
1016 ar5523_config(ar, CFG_TPC_HALF_DBM5, 0x0000003c);
1017 ar5523_config(ar, CFG_TPC_HALF_DBM2, 0x0000003c);
1018 ar5523_config(ar, CFG_OVERRD_TX_POWER, 0x00000000);
1019 ar5523_config(ar, CFG_GMODE_PROTECTION, 0x00000000);
1020 ar5523_config(ar, CFG_GMODE_PROTECT_RATE_INDEX, 0x00000003);
1021 ar5523_config(ar, CFG_PROTECTION_TYPE, 0x00000000);
1022 ar5523_config(ar, CFG_MODE_CTS, 0x00000002);
1023
1024 error = ar5523_cmd_read(ar, WDCMSG_TARGET_START, NULL, 0,
1025 &val, sizeof(val), AR5523_CMD_FLAG_MAGIC);
1026 if (error) {
1027 ar5523_dbg(ar, "could not start target, error %d\n", error);
1028 goto err;
1029 }
1030 ar5523_dbg(ar, "WDCMSG_TARGET_START returns handle: 0x%x\n",
1031 be32_to_cpu(val));
1032
1033 ar5523_switch_chan(ar);
1034
1035 val = cpu_to_be32(TARGET_DEVICE_AWAKE);
1036 ar5523_cmd_write(ar, WDCMSG_SET_PWR_MODE, &val, sizeof(val), 0);
1037 /* XXX? check */
1038 ar5523_cmd_write(ar, WDCMSG_RESET_KEY_CACHE, NULL, 0, 0);
1039
1040 set_bit(AR5523_HW_UP, &ar->flags);
1041 queue_work(ar->wq, &ar->rx_refill_work);
1042
1043 /* enable Rx */
1044 ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1045 ar5523_set_rxfilter(ar,
1046 UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1047 UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON,
1048 UATH_FILTER_OP_SET);
1049
1050 ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_ON);
1051 ar5523_dbg(ar, "start OK\n");
1052
1053 err:
1054 mutex_unlock(&ar->mutex);
1055 return error;
1056 }
1057
ar5523_stop(struct ieee80211_hw * hw)1058 static void ar5523_stop(struct ieee80211_hw *hw)
1059 {
1060 struct ar5523 *ar = hw->priv;
1061
1062 ar5523_dbg(ar, "stop called\n");
1063
1064 cancel_delayed_work_sync(&ar->stat_work);
1065 mutex_lock(&ar->mutex);
1066 clear_bit(AR5523_HW_UP, &ar->flags);
1067
1068 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1069 ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_OFF);
1070
1071 ar5523_cmd_write(ar, WDCMSG_TARGET_STOP, NULL, 0, 0);
1072
1073 del_timer_sync(&ar->tx_wd_timer);
1074 cancel_work_sync(&ar->tx_wd_work);
1075 cancel_work_sync(&ar->rx_refill_work);
1076 ar5523_cancel_rx_bufs(ar);
1077 mutex_unlock(&ar->mutex);
1078 }
1079
ar5523_set_rts_threshold(struct ieee80211_hw * hw,u32 value)1080 static int ar5523_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1081 {
1082 struct ar5523 *ar = hw->priv;
1083 int ret;
1084
1085 ar5523_dbg(ar, "set_rts_threshold called\n");
1086 mutex_lock(&ar->mutex);
1087
1088 ret = ar5523_config(ar, CFG_USER_RTS_THRESHOLD, value);
1089
1090 mutex_unlock(&ar->mutex);
1091 return ret;
1092 }
1093
ar5523_flush(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 queues,bool drop)1094 static void ar5523_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1095 u32 queues, bool drop)
1096 {
1097 struct ar5523 *ar = hw->priv;
1098
1099 ar5523_dbg(ar, "flush called\n");
1100 ar5523_flush_tx(ar);
1101 }
1102
ar5523_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1103 static int ar5523_add_interface(struct ieee80211_hw *hw,
1104 struct ieee80211_vif *vif)
1105 {
1106 struct ar5523 *ar = hw->priv;
1107
1108 ar5523_dbg(ar, "add interface called\n");
1109
1110 if (ar->vif) {
1111 ar5523_dbg(ar, "invalid add_interface\n");
1112 return -EOPNOTSUPP;
1113 }
1114
1115 switch (vif->type) {
1116 case NL80211_IFTYPE_STATION:
1117 ar->vif = vif;
1118 break;
1119 default:
1120 return -EOPNOTSUPP;
1121 }
1122 return 0;
1123 }
1124
ar5523_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1125 static void ar5523_remove_interface(struct ieee80211_hw *hw,
1126 struct ieee80211_vif *vif)
1127 {
1128 struct ar5523 *ar = hw->priv;
1129
1130 ar5523_dbg(ar, "remove interface called\n");
1131 ar->vif = NULL;
1132 }
1133
ar5523_hwconfig(struct ieee80211_hw * hw,u32 changed)1134 static int ar5523_hwconfig(struct ieee80211_hw *hw, u32 changed)
1135 {
1136 struct ar5523 *ar = hw->priv;
1137
1138 ar5523_dbg(ar, "config called\n");
1139 mutex_lock(&ar->mutex);
1140 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1141 ar5523_dbg(ar, "Do channel switch\n");
1142 ar5523_flush_tx(ar);
1143 ar5523_switch_chan(ar);
1144 }
1145 mutex_unlock(&ar->mutex);
1146 return 0;
1147 }
1148
ar5523_get_wlan_mode(struct ar5523 * ar,struct ieee80211_bss_conf * bss_conf)1149 static int ar5523_get_wlan_mode(struct ar5523 *ar,
1150 struct ieee80211_bss_conf *bss_conf)
1151 {
1152 struct ieee80211_supported_band *band;
1153 int bit;
1154 struct ieee80211_sta *sta;
1155 u32 sta_rate_set;
1156
1157 band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1158 sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1159 if (!sta) {
1160 ar5523_info(ar, "STA not found!\n");
1161 return WLAN_MODE_11b;
1162 }
1163 sta_rate_set = sta->deflink.supp_rates[ar->hw->conf.chandef.chan->band];
1164
1165 for (bit = 0; bit < band->n_bitrates; bit++) {
1166 if (sta_rate_set & 1) {
1167 int rate = band->bitrates[bit].bitrate;
1168 switch (rate) {
1169 case 60:
1170 case 90:
1171 case 120:
1172 case 180:
1173 case 240:
1174 case 360:
1175 case 480:
1176 case 540:
1177 return WLAN_MODE_11g;
1178 }
1179 }
1180 sta_rate_set >>= 1;
1181 }
1182 return WLAN_MODE_11b;
1183 }
1184
ar5523_create_rateset(struct ar5523 * ar,struct ieee80211_bss_conf * bss_conf,struct ar5523_cmd_rateset * rs,bool basic)1185 static void ar5523_create_rateset(struct ar5523 *ar,
1186 struct ieee80211_bss_conf *bss_conf,
1187 struct ar5523_cmd_rateset *rs,
1188 bool basic)
1189 {
1190 struct ieee80211_supported_band *band;
1191 struct ieee80211_sta *sta;
1192 int bit, i = 0;
1193 u32 sta_rate_set, basic_rate_set;
1194
1195 sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1196 basic_rate_set = bss_conf->basic_rates;
1197 if (!sta) {
1198 ar5523_info(ar, "STA not found. Cannot set rates\n");
1199 sta_rate_set = bss_conf->basic_rates;
1200 } else
1201 sta_rate_set = sta->deflink.supp_rates[ar->hw->conf.chandef.chan->band];
1202
1203 ar5523_dbg(ar, "sta rate_set = %08x\n", sta_rate_set);
1204
1205 band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1206 for (bit = 0; bit < band->n_bitrates; bit++) {
1207 BUG_ON(i >= AR5523_MAX_NRATES);
1208 ar5523_dbg(ar, "Considering rate %d : %d\n",
1209 band->bitrates[bit].hw_value, sta_rate_set & 1);
1210 if (sta_rate_set & 1) {
1211 rs->set[i] = band->bitrates[bit].hw_value;
1212 if (basic_rate_set & 1 && basic)
1213 rs->set[i] |= 0x80;
1214 i++;
1215 }
1216 sta_rate_set >>= 1;
1217 basic_rate_set >>= 1;
1218 }
1219
1220 rs->length = i;
1221 }
1222
ar5523_set_basic_rates(struct ar5523 * ar,struct ieee80211_bss_conf * bss)1223 static int ar5523_set_basic_rates(struct ar5523 *ar,
1224 struct ieee80211_bss_conf *bss)
1225 {
1226 struct ar5523_cmd_rates rates;
1227
1228 memset(&rates, 0, sizeof(rates));
1229 rates.connid = cpu_to_be32(2); /* XXX */
1230 rates.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1231 ar5523_create_rateset(ar, bss, &rates.rateset, true);
1232
1233 return ar5523_cmd_write(ar, WDCMSG_SET_BASIC_RATE, &rates,
1234 sizeof(rates), 0);
1235 }
1236
ar5523_create_connection(struct ar5523 * ar,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss)1237 static int ar5523_create_connection(struct ar5523 *ar,
1238 struct ieee80211_vif *vif,
1239 struct ieee80211_bss_conf *bss)
1240 {
1241 struct ar5523_cmd_create_connection create;
1242 int wlan_mode;
1243
1244 memset(&create, 0, sizeof(create));
1245 create.connid = cpu_to_be32(2);
1246 create.bssid = cpu_to_be32(0);
1247 /* XXX packed or not? */
1248 create.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1249
1250 ar5523_create_rateset(ar, bss, &create.connattr.rateset, false);
1251
1252 wlan_mode = ar5523_get_wlan_mode(ar, bss);
1253 create.connattr.wlanmode = cpu_to_be32(wlan_mode);
1254
1255 return ar5523_cmd_write(ar, WDCMSG_CREATE_CONNECTION, &create,
1256 sizeof(create), 0);
1257 }
1258
ar5523_write_associd(struct ar5523 * ar,struct ieee80211_vif * vif)1259 static int ar5523_write_associd(struct ar5523 *ar, struct ieee80211_vif *vif)
1260 {
1261 struct ieee80211_bss_conf *bss = &vif->bss_conf;
1262 struct ar5523_cmd_set_associd associd;
1263
1264 memset(&associd, 0, sizeof(associd));
1265 associd.defaultrateix = cpu_to_be32(0); /* XXX */
1266 associd.associd = cpu_to_be32(vif->cfg.aid);
1267 associd.timoffset = cpu_to_be32(0x3b); /* XXX */
1268 memcpy(associd.bssid, bss->bssid, ETH_ALEN);
1269 return ar5523_cmd_write(ar, WDCMSG_WRITE_ASSOCID, &associd,
1270 sizeof(associd), 0);
1271 }
1272
ar5523_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss,u64 changed)1273 static void ar5523_bss_info_changed(struct ieee80211_hw *hw,
1274 struct ieee80211_vif *vif,
1275 struct ieee80211_bss_conf *bss,
1276 u64 changed)
1277 {
1278 struct ar5523 *ar = hw->priv;
1279 int error;
1280
1281 ar5523_dbg(ar, "bss_info_changed called\n");
1282 mutex_lock(&ar->mutex);
1283
1284 if (!(changed & BSS_CHANGED_ASSOC))
1285 goto out_unlock;
1286
1287 if (vif->cfg.assoc) {
1288 error = ar5523_create_connection(ar, vif, bss);
1289 if (error) {
1290 ar5523_err(ar, "could not create connection\n");
1291 goto out_unlock;
1292 }
1293
1294 error = ar5523_set_basic_rates(ar, bss);
1295 if (error) {
1296 ar5523_err(ar, "could not set negotiated rate set\n");
1297 goto out_unlock;
1298 }
1299
1300 error = ar5523_write_associd(ar, vif);
1301 if (error) {
1302 ar5523_err(ar, "could not set association\n");
1303 goto out_unlock;
1304 }
1305
1306 /* turn link LED on */
1307 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_ON);
1308 set_bit(AR5523_CONNECTED, &ar->flags);
1309 ieee80211_queue_delayed_work(hw, &ar->stat_work, HZ);
1310
1311 } else {
1312 cancel_delayed_work(&ar->stat_work);
1313 clear_bit(AR5523_CONNECTED, &ar->flags);
1314 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1315 }
1316
1317 out_unlock:
1318 mutex_unlock(&ar->mutex);
1319
1320 }
1321
1322 #define AR5523_SUPPORTED_FILTERS (FIF_ALLMULTI | \
1323 FIF_FCSFAIL | \
1324 FIF_OTHER_BSS)
1325
ar5523_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)1326 static void ar5523_configure_filter(struct ieee80211_hw *hw,
1327 unsigned int changed_flags,
1328 unsigned int *total_flags,
1329 u64 multicast)
1330 {
1331 struct ar5523 *ar = hw->priv;
1332 u32 filter = 0;
1333
1334 ar5523_dbg(ar, "configure_filter called\n");
1335 mutex_lock(&ar->mutex);
1336 ar5523_flush_tx(ar);
1337
1338 *total_flags &= AR5523_SUPPORTED_FILTERS;
1339
1340 /* The filters seems strange. UATH_FILTER_RX_BCAST and
1341 * UATH_FILTER_RX_MCAST does not result in those frames being RXed.
1342 * The only way I have found to get [mb]cast frames seems to be
1343 * to set UATH_FILTER_RX_PROM. */
1344 filter |= UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1345 UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON |
1346 UATH_FILTER_RX_PROM;
1347
1348 ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1349 ar5523_set_rxfilter(ar, filter, UATH_FILTER_OP_SET);
1350
1351 mutex_unlock(&ar->mutex);
1352 }
1353
1354 static const struct ieee80211_ops ar5523_ops = {
1355 .start = ar5523_start,
1356 .stop = ar5523_stop,
1357 .tx = ar5523_tx,
1358 .set_rts_threshold = ar5523_set_rts_threshold,
1359 .add_interface = ar5523_add_interface,
1360 .remove_interface = ar5523_remove_interface,
1361 .config = ar5523_hwconfig,
1362 .bss_info_changed = ar5523_bss_info_changed,
1363 .configure_filter = ar5523_configure_filter,
1364 .flush = ar5523_flush,
1365 };
1366
ar5523_host_available(struct ar5523 * ar)1367 static int ar5523_host_available(struct ar5523 *ar)
1368 {
1369 struct ar5523_cmd_host_available setup;
1370
1371 /* inform target the host is available */
1372 setup.sw_ver_major = cpu_to_be32(ATH_SW_VER_MAJOR);
1373 setup.sw_ver_minor = cpu_to_be32(ATH_SW_VER_MINOR);
1374 setup.sw_ver_patch = cpu_to_be32(ATH_SW_VER_PATCH);
1375 setup.sw_ver_build = cpu_to_be32(ATH_SW_VER_BUILD);
1376 return ar5523_cmd_read(ar, WDCMSG_HOST_AVAILABLE,
1377 &setup, sizeof(setup), NULL, 0, 0);
1378 }
1379
ar5523_get_devstatus(struct ar5523 * ar)1380 static int ar5523_get_devstatus(struct ar5523 *ar)
1381 {
1382 u8 macaddr[ETH_ALEN];
1383 int error;
1384
1385 /* retrieve MAC address */
1386 error = ar5523_get_status(ar, ST_MAC_ADDR, macaddr, ETH_ALEN);
1387 if (error) {
1388 ar5523_err(ar, "could not read MAC address\n");
1389 return error;
1390 }
1391
1392 SET_IEEE80211_PERM_ADDR(ar->hw, macaddr);
1393
1394 error = ar5523_get_status(ar, ST_SERIAL_NUMBER,
1395 &ar->serial[0], sizeof(ar->serial));
1396 if (error) {
1397 ar5523_err(ar, "could not read device serial number\n");
1398 return error;
1399 }
1400 return 0;
1401 }
1402
1403 #define AR5523_SANE_RXBUFSZ 2000
1404
ar5523_get_max_rxsz(struct ar5523 * ar)1405 static int ar5523_get_max_rxsz(struct ar5523 *ar)
1406 {
1407 int error;
1408 __be32 rxsize;
1409
1410 /* Get max rx size */
1411 error = ar5523_get_status(ar, ST_WDC_TRANSPORT_CHUNK_SIZE, &rxsize,
1412 sizeof(rxsize));
1413 if (error != 0) {
1414 ar5523_err(ar, "could not read max RX size\n");
1415 return error;
1416 }
1417
1418 ar->rxbufsz = be32_to_cpu(rxsize);
1419
1420 if (!ar->rxbufsz || ar->rxbufsz > AR5523_SANE_RXBUFSZ) {
1421 ar5523_err(ar, "Bad rxbufsz from device. Using %d instead\n",
1422 AR5523_SANE_RXBUFSZ);
1423 ar->rxbufsz = AR5523_SANE_RXBUFSZ;
1424 }
1425
1426 ar5523_dbg(ar, "Max RX buf size: %d\n", ar->rxbufsz);
1427 return 0;
1428 }
1429
1430 /*
1431 * This is copied from rtl818x, but we should probably move this
1432 * to common code as in OpenBSD.
1433 */
1434 static const struct ieee80211_rate ar5523_rates[] = {
1435 { .bitrate = 10, .hw_value = 2, },
1436 { .bitrate = 20, .hw_value = 4 },
1437 { .bitrate = 55, .hw_value = 11, },
1438 { .bitrate = 110, .hw_value = 22, },
1439 { .bitrate = 60, .hw_value = 12, },
1440 { .bitrate = 90, .hw_value = 18, },
1441 { .bitrate = 120, .hw_value = 24, },
1442 { .bitrate = 180, .hw_value = 36, },
1443 { .bitrate = 240, .hw_value = 48, },
1444 { .bitrate = 360, .hw_value = 72, },
1445 { .bitrate = 480, .hw_value = 96, },
1446 { .bitrate = 540, .hw_value = 108, },
1447 };
1448
1449 static const struct ieee80211_channel ar5523_channels[] = {
1450 { .center_freq = 2412 },
1451 { .center_freq = 2417 },
1452 { .center_freq = 2422 },
1453 { .center_freq = 2427 },
1454 { .center_freq = 2432 },
1455 { .center_freq = 2437 },
1456 { .center_freq = 2442 },
1457 { .center_freq = 2447 },
1458 { .center_freq = 2452 },
1459 { .center_freq = 2457 },
1460 { .center_freq = 2462 },
1461 { .center_freq = 2467 },
1462 { .center_freq = 2472 },
1463 { .center_freq = 2484 },
1464 };
1465
ar5523_init_modes(struct ar5523 * ar)1466 static int ar5523_init_modes(struct ar5523 *ar)
1467 {
1468 BUILD_BUG_ON(sizeof(ar->channels) != sizeof(ar5523_channels));
1469 BUILD_BUG_ON(sizeof(ar->rates) != sizeof(ar5523_rates));
1470
1471 memcpy(ar->channels, ar5523_channels, sizeof(ar5523_channels));
1472 memcpy(ar->rates, ar5523_rates, sizeof(ar5523_rates));
1473
1474 ar->band.band = NL80211_BAND_2GHZ;
1475 ar->band.channels = ar->channels;
1476 ar->band.n_channels = ARRAY_SIZE(ar5523_channels);
1477 ar->band.bitrates = ar->rates;
1478 ar->band.n_bitrates = ARRAY_SIZE(ar5523_rates);
1479 ar->hw->wiphy->bands[NL80211_BAND_2GHZ] = &ar->band;
1480 return 0;
1481 }
1482
1483 /*
1484 * Load the MIPS R4000 microcode into the device. Once the image is loaded,
1485 * the device will detach itself from the bus and reattach later with a new
1486 * product Id (a la ezusb).
1487 */
ar5523_load_firmware(struct usb_device * dev)1488 static int ar5523_load_firmware(struct usb_device *dev)
1489 {
1490 struct ar5523_fwblock *txblock, *rxblock;
1491 const struct firmware *fw;
1492 void *fwbuf;
1493 int len, offset;
1494 int foolen; /* XXX(hch): handle short transfers */
1495 int error = -ENXIO;
1496
1497 if (request_firmware(&fw, AR5523_FIRMWARE_FILE, &dev->dev)) {
1498 dev_err(&dev->dev, "no firmware found: %s\n",
1499 AR5523_FIRMWARE_FILE);
1500 return -ENOENT;
1501 }
1502
1503 txblock = kzalloc(sizeof(*txblock), GFP_KERNEL);
1504 if (!txblock)
1505 goto out;
1506
1507 rxblock = kmalloc(sizeof(*rxblock), GFP_KERNEL);
1508 if (!rxblock)
1509 goto out_free_txblock;
1510
1511 fwbuf = kmalloc(AR5523_MAX_FWBLOCK_SIZE, GFP_KERNEL);
1512 if (!fwbuf)
1513 goto out_free_rxblock;
1514
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
ar5523_probe(struct usb_interface * intf,const struct usb_device_id * id)1578 static 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 timer_setup(&ar->tx_wd_timer, ar5523_tx_wd_timer, 0);
1607 INIT_WORK(&ar->tx_wd_work, ar5523_tx_wd_work);
1608 INIT_WORK(&ar->tx_work, ar5523_tx_work);
1609 INIT_LIST_HEAD(&ar->tx_queue_pending);
1610 INIT_LIST_HEAD(&ar->tx_queue_submitted);
1611 spin_lock_init(&ar->tx_data_list_lock);
1612 atomic_set(&ar->tx_nr_total, 0);
1613 atomic_set(&ar->tx_nr_pending, 0);
1614 init_waitqueue_head(&ar->tx_flush_waitq);
1615
1616 atomic_set(&ar->rx_data_free_cnt, 0);
1617 INIT_WORK(&ar->rx_refill_work, ar5523_rx_refill_work);
1618 INIT_LIST_HEAD(&ar->rx_data_free);
1619 INIT_LIST_HEAD(&ar->rx_data_used);
1620 spin_lock_init(&ar->rx_data_list_lock);
1621
1622 ar->wq = create_singlethread_workqueue("ar5523");
1623 if (!ar->wq) {
1624 ar5523_err(ar, "Could not create wq\n");
1625 goto out_free_ar;
1626 }
1627
1628 error = ar5523_alloc_rx_bufs(ar);
1629 if (error) {
1630 ar5523_err(ar, "Could not allocate rx buffers\n");
1631 goto out_free_wq;
1632 }
1633
1634 error = ar5523_alloc_rx_cmd(ar);
1635 if (error) {
1636 ar5523_err(ar, "Could not allocate rx command buffers\n");
1637 goto out_free_rx_bufs;
1638 }
1639
1640 error = ar5523_alloc_tx_cmd(ar);
1641 if (error) {
1642 ar5523_err(ar, "Could not allocate tx command buffers\n");
1643 goto out_free_rx_cmd;
1644 }
1645
1646 error = ar5523_submit_rx_cmd(ar);
1647 if (error) {
1648 ar5523_err(ar, "Failed to submit rx cmd\n");
1649 goto out_free_tx_cmd;
1650 }
1651
1652 /*
1653 * We're now ready to send/receive firmware commands.
1654 */
1655 error = ar5523_host_available(ar);
1656 if (error) {
1657 ar5523_err(ar, "could not initialize adapter\n");
1658 goto out_cancel_rx_cmd;
1659 }
1660
1661 error = ar5523_get_max_rxsz(ar);
1662 if (error) {
1663 ar5523_err(ar, "could not get caps from adapter\n");
1664 goto out_cancel_rx_cmd;
1665 }
1666
1667 error = ar5523_get_devcap(ar);
1668 if (error) {
1669 ar5523_err(ar, "could not get caps from adapter\n");
1670 goto out_cancel_rx_cmd;
1671 }
1672
1673 error = ar5523_get_devstatus(ar);
1674 if (error != 0) {
1675 ar5523_err(ar, "could not get device status\n");
1676 goto out_cancel_rx_cmd;
1677 }
1678
1679 ar5523_info(ar, "MAC/BBP AR5523, RF AR%c112\n",
1680 (id->driver_info & AR5523_FLAG_ABG) ? '5' : '2');
1681
1682 ar->vif = NULL;
1683 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1684 ieee80211_hw_set(hw, RX_INCLUDES_FCS);
1685 ieee80211_hw_set(hw, SIGNAL_DBM);
1686 hw->extra_tx_headroom = sizeof(struct ar5523_tx_desc) +
1687 sizeof(struct ar5523_chunk);
1688 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1689 hw->queues = 1;
1690
1691 error = ar5523_init_modes(ar);
1692 if (error)
1693 goto out_cancel_rx_cmd;
1694
1695 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1696
1697 usb_set_intfdata(intf, hw);
1698
1699 error = ieee80211_register_hw(hw);
1700 if (error) {
1701 ar5523_err(ar, "could not register device\n");
1702 goto out_cancel_rx_cmd;
1703 }
1704
1705 ar5523_info(ar, "Found and initialized AR5523 device\n");
1706 return 0;
1707
1708 out_cancel_rx_cmd:
1709 ar5523_cancel_rx_cmd(ar);
1710 out_free_tx_cmd:
1711 ar5523_free_tx_cmd(ar);
1712 out_free_rx_cmd:
1713 ar5523_free_rx_cmd(ar);
1714 out_free_rx_bufs:
1715 ar5523_free_rx_bufs(ar);
1716 out_free_wq:
1717 destroy_workqueue(ar->wq);
1718 out_free_ar:
1719 ieee80211_free_hw(hw);
1720 out:
1721 return error;
1722 }
1723
ar5523_disconnect(struct usb_interface * intf)1724 static void ar5523_disconnect(struct usb_interface *intf)
1725 {
1726 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1727 struct ar5523 *ar = hw->priv;
1728
1729 ar5523_dbg(ar, "detaching\n");
1730 set_bit(AR5523_USB_DISCONNECTED, &ar->flags);
1731
1732 ieee80211_unregister_hw(hw);
1733
1734 ar5523_cancel_rx_cmd(ar);
1735 ar5523_free_tx_cmd(ar);
1736 ar5523_free_rx_cmd(ar);
1737 ar5523_free_rx_bufs(ar);
1738
1739 destroy_workqueue(ar->wq);
1740
1741 ieee80211_free_hw(hw);
1742 usb_set_intfdata(intf, NULL);
1743 }
1744
1745 #define AR5523_DEVICE_UG(vendor, device) \
1746 { USB_DEVICE((vendor), (device)) }, \
1747 { USB_DEVICE((vendor), (device) + 1), \
1748 .driver_info = AR5523_FLAG_PRE_FIRMWARE }
1749 #define AR5523_DEVICE_UX(vendor, device) \
1750 { USB_DEVICE((vendor), (device)), \
1751 .driver_info = AR5523_FLAG_ABG }, \
1752 { USB_DEVICE((vendor), (device) + 1), \
1753 .driver_info = AR5523_FLAG_ABG|AR5523_FLAG_PRE_FIRMWARE }
1754
1755 static const struct usb_device_id ar5523_id_table[] = {
1756 AR5523_DEVICE_UG(0x168c, 0x0001), /* Atheros / AR5523 */
1757 AR5523_DEVICE_UG(0x0cf3, 0x0001), /* Atheros2 / AR5523_1 */
1758 AR5523_DEVICE_UG(0x0cf3, 0x0003), /* Atheros2 / AR5523_2 */
1759 AR5523_DEVICE_UX(0x0cf3, 0x0005), /* Atheros2 / AR5523_3 */
1760 AR5523_DEVICE_UG(0x0d8e, 0x7801), /* Conceptronic / AR5523_1 */
1761 AR5523_DEVICE_UX(0x0d8e, 0x7811), /* Conceptronic / AR5523_2 */
1762 AR5523_DEVICE_UX(0x2001, 0x3a00), /* Dlink / DWLAG132 */
1763 AR5523_DEVICE_UG(0x2001, 0x3a02), /* Dlink / DWLG132 */
1764 AR5523_DEVICE_UX(0x2001, 0x3a04), /* Dlink / DWLAG122 */
1765 AR5523_DEVICE_UG(0x07d1, 0x3a07), /* D-Link / WUA-2340 rev A1 */
1766 AR5523_DEVICE_UG(0x1690, 0x0712), /* Gigaset / AR5523 */
1767 AR5523_DEVICE_UG(0x1690, 0x0710), /* Gigaset / SMCWUSBTG */
1768 AR5523_DEVICE_UG(0x129b, 0x160b), /* Gigaset / USB stick 108
1769 (CyberTAN Technology) */
1770 AR5523_DEVICE_UG(0x16ab, 0x7801), /* Globalsun / AR5523_1 */
1771 AR5523_DEVICE_UX(0x16ab, 0x7811), /* Globalsun / AR5523_2 */
1772 AR5523_DEVICE_UG(0x0d8e, 0x7802), /* Globalsun / AR5523_3 */
1773 AR5523_DEVICE_UX(0x0846, 0x4300), /* Netgear / WG111U */
1774 AR5523_DEVICE_UG(0x0846, 0x4250), /* Netgear / WG111T */
1775 AR5523_DEVICE_UG(0x0846, 0x5f00), /* Netgear / WPN111 */
1776 AR5523_DEVICE_UG(0x083a, 0x4506), /* SMC / EZ Connect
1777 SMCWUSBT-G2 */
1778 AR5523_DEVICE_UG(0x157e, 0x3006), /* Umedia / AR5523_1, TEW444UBEU*/
1779 AR5523_DEVICE_UX(0x157e, 0x3205), /* Umedia / AR5523_2 */
1780 AR5523_DEVICE_UG(0x1435, 0x0826), /* Wistronneweb / AR5523_1 */
1781 AR5523_DEVICE_UX(0x1435, 0x0828), /* Wistronneweb / AR5523_2 */
1782 AR5523_DEVICE_UG(0x0cde, 0x0012), /* Zcom / AR5523 */
1783 AR5523_DEVICE_UG(0x1385, 0x4250), /* Netgear3 / WG111T (2) */
1784 AR5523_DEVICE_UG(0x1385, 0x5f00), /* Netgear / WPN111 */
1785 AR5523_DEVICE_UG(0x1385, 0x5f02), /* Netgear / WPN111 */
1786 { }
1787 };
1788 MODULE_DEVICE_TABLE(usb, ar5523_id_table);
1789
1790 static struct usb_driver ar5523_driver = {
1791 .name = "ar5523",
1792 .id_table = ar5523_id_table,
1793 .probe = ar5523_probe,
1794 .disconnect = ar5523_disconnect,
1795 };
1796
1797 module_usb_driver(ar5523_driver);
1798
1799 MODULE_LICENSE("Dual BSD/GPL");
1800 MODULE_FIRMWARE(AR5523_FIRMWARE_FILE);
1801
