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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
42
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
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
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
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
150
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
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
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 if (ilen)
259 memcpy(hdr + 1, idata, ilen);
260
261 cmd->odata = odata;
262 cmd->olen = olen;
263 cmd->flags = flags;
264
265 ar5523_dbg(ar, "do cmd %02x\n", code);
266
267 usb_fill_bulk_urb(cmd->urb_tx, ar->dev, ar5523_cmd_tx_pipe(ar->dev),
268 cmd->buf_tx, xferlen, ar5523_cmd_tx_cb, cmd);
269 cmd->urb_tx->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
270
271 error = usb_submit_urb(cmd->urb_tx, GFP_KERNEL);
272 if (error) {
273 ar5523_err(ar, "could not send command 0x%x, error=%d\n",
274 code, error);
275 return error;
276 }
277
278 if (!wait_for_completion_timeout(&cmd->done, 2 * HZ)) {
279 cmd->odata = NULL;
280 ar5523_err(ar, "timeout waiting for command %02x reply\n",
281 code);
282 cmd->res = -ETIMEDOUT;
283 }
284 return cmd->res;
285}
286
287static int ar5523_cmd_write(struct ar5523 *ar, u32 code, const void *data,
288 int len, int flags)
289{
290 flags &= ~AR5523_CMD_FLAG_READ;
291 return ar5523_cmd(ar, code, data, len, NULL, 0, flags);
292}
293
294static int ar5523_cmd_read(struct ar5523 *ar, u32 code, const void *idata,
295 int ilen, void *odata, int olen, int flags)
296{
297 flags |= AR5523_CMD_FLAG_READ;
298 return ar5523_cmd(ar, code, idata, ilen, odata, olen, flags);
299}
300
301static int ar5523_config(struct ar5523 *ar, u32 reg, u32 val)
302{
303 struct ar5523_write_mac write;
304 int error;
305
306 write.reg = cpu_to_be32(reg);
307 write.len = cpu_to_be32(0);
308 *(__be32 *)write.data = cpu_to_be32(val);
309
310 error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
311 3 * sizeof(u32), 0);
312 if (error != 0)
313 ar5523_err(ar, "could not write register 0x%02x\n", reg);
314 return error;
315}
316
317static int ar5523_config_multi(struct ar5523 *ar, u32 reg, const void *data,
318 int len)
319{
320 struct ar5523_write_mac write;
321 int error;
322
323 write.reg = cpu_to_be32(reg);
324 write.len = cpu_to_be32(len);
325 memcpy(write.data, data, len);
326
327
328 error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
329 (len == 0) ? sizeof(u32) : 2 * sizeof(u32) + len, 0);
330 if (error != 0)
331 ar5523_err(ar, "could not write %d bytes to register 0x%02x\n",
332 len, reg);
333 return error;
334}
335
336static int ar5523_get_status(struct ar5523 *ar, u32 which, void *odata,
337 int olen)
338{
339 int error;
340 __be32 which_be;
341
342 which_be = cpu_to_be32(which);
343 error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_STATUS,
344 &which_be, sizeof(which_be), odata, olen, AR5523_CMD_FLAG_MAGIC);
345 if (error != 0)
346 ar5523_err(ar, "could not read EEPROM offset 0x%02x\n", which);
347 return error;
348}
349
350static int ar5523_get_capability(struct ar5523 *ar, u32 cap, u32 *val)
351{
352 int error;
353 __be32 cap_be, val_be;
354
355 cap_be = cpu_to_be32(cap);
356 error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_CAPABILITY, &cap_be,
357 sizeof(cap_be), &val_be, sizeof(__be32),
358 AR5523_CMD_FLAG_MAGIC);
359 if (error != 0) {
360 ar5523_err(ar, "could not read capability %u\n", cap);
361 return error;
362 }
363 *val = be32_to_cpu(val_be);
364 return error;
365}
366
367static int ar5523_get_devcap(struct ar5523 *ar)
368{
369#define GETCAP(x) do { \
370 error = ar5523_get_capability(ar, x, &cap); \
371 if (error != 0) \
372 return error; \
373 ar5523_info(ar, "Cap: " \
374 "%s=0x%08x\n", #x, cap); \
375} while (0)
376 int error;
377 u32 cap;
378
379
380 GETCAP(CAP_TARGET_VERSION);
381 GETCAP(CAP_TARGET_REVISION);
382 GETCAP(CAP_MAC_VERSION);
383 GETCAP(CAP_MAC_REVISION);
384 GETCAP(CAP_PHY_REVISION);
385 GETCAP(CAP_ANALOG_5GHz_REVISION);
386 GETCAP(CAP_ANALOG_2GHz_REVISION);
387
388 GETCAP(CAP_REG_DOMAIN);
389 GETCAP(CAP_REG_CAP_BITS);
390 GETCAP(CAP_WIRELESS_MODES);
391 GETCAP(CAP_CHAN_SPREAD_SUPPORT);
392 GETCAP(CAP_COMPRESS_SUPPORT);
393 GETCAP(CAP_BURST_SUPPORT);
394 GETCAP(CAP_FAST_FRAMES_SUPPORT);
395 GETCAP(CAP_CHAP_TUNING_SUPPORT);
396 GETCAP(CAP_TURBOG_SUPPORT);
397 GETCAP(CAP_TURBO_PRIME_SUPPORT);
398 GETCAP(CAP_DEVICE_TYPE);
399 GETCAP(CAP_WME_SUPPORT);
400 GETCAP(CAP_TOTAL_QUEUES);
401 GETCAP(CAP_CONNECTION_ID_MAX);
402
403 GETCAP(CAP_LOW_5GHZ_CHAN);
404 GETCAP(CAP_HIGH_5GHZ_CHAN);
405 GETCAP(CAP_LOW_2GHZ_CHAN);
406 GETCAP(CAP_HIGH_2GHZ_CHAN);
407 GETCAP(CAP_TWICE_ANTENNAGAIN_5G);
408 GETCAP(CAP_TWICE_ANTENNAGAIN_2G);
409
410 GETCAP(CAP_CIPHER_AES_CCM);
411 GETCAP(CAP_CIPHER_TKIP);
412 GETCAP(CAP_MIC_TKIP);
413 return 0;
414}
415
416static int ar5523_set_ledsteady(struct ar5523 *ar, int lednum, int ledmode)
417{
418 struct ar5523_cmd_ledsteady led;
419
420 led.lednum = cpu_to_be32(lednum);
421 led.ledmode = cpu_to_be32(ledmode);
422
423 ar5523_dbg(ar, "set %s led %s (steady)\n",
424 (lednum == UATH_LED_LINK) ? "link" : "activity",
425 ledmode ? "on" : "off");
426 return ar5523_cmd_write(ar, WDCMSG_SET_LED_STEADY, &led, sizeof(led),
427 0);
428}
429
430static int ar5523_set_rxfilter(struct ar5523 *ar, u32 bits, u32 op)
431{
432 struct ar5523_cmd_rx_filter rxfilter;
433
434 rxfilter.bits = cpu_to_be32(bits);
435 rxfilter.op = cpu_to_be32(op);
436
437 ar5523_dbg(ar, "setting Rx filter=0x%x flags=0x%x\n", bits, op);
438 return ar5523_cmd_write(ar, WDCMSG_RX_FILTER, &rxfilter,
439 sizeof(rxfilter), 0);
440}
441
442static int ar5523_reset_tx_queues(struct ar5523 *ar)
443{
444 __be32 qid = cpu_to_be32(0);
445
446 ar5523_dbg(ar, "resetting Tx queue\n");
447 return ar5523_cmd_write(ar, WDCMSG_RELEASE_TX_QUEUE,
448 &qid, sizeof(qid), 0);
449}
450
451static int ar5523_set_chan(struct ar5523 *ar)
452{
453 struct ieee80211_conf *conf = &ar->hw->conf;
454
455 struct ar5523_cmd_reset reset;
456
457 memset(&reset, 0, sizeof(reset));
458 reset.flags |= cpu_to_be32(UATH_CHAN_2GHZ);
459 reset.flags |= cpu_to_be32(UATH_CHAN_OFDM);
460 reset.freq = cpu_to_be32(conf->chandef.chan->center_freq);
461 reset.maxrdpower = cpu_to_be32(50);
462 reset.channelchange = cpu_to_be32(1);
463 reset.keeprccontent = cpu_to_be32(0);
464
465 ar5523_dbg(ar, "set chan flags 0x%x freq %d\n",
466 be32_to_cpu(reset.flags),
467 conf->chandef.chan->center_freq);
468 return ar5523_cmd_write(ar, WDCMSG_RESET, &reset, sizeof(reset), 0);
469}
470
471static int ar5523_queue_init(struct ar5523 *ar)
472{
473 struct ar5523_cmd_txq_setup qinfo;
474
475 ar5523_dbg(ar, "setting up Tx queue\n");
476 qinfo.qid = cpu_to_be32(0);
477 qinfo.len = cpu_to_be32(sizeof(qinfo.attr));
478 qinfo.attr.priority = cpu_to_be32(0);
479 qinfo.attr.aifs = cpu_to_be32(3);
480 qinfo.attr.logcwmin = cpu_to_be32(4);
481 qinfo.attr.logcwmax = cpu_to_be32(10);
482 qinfo.attr.bursttime = cpu_to_be32(0);
483 qinfo.attr.mode = cpu_to_be32(0);
484 qinfo.attr.qflags = cpu_to_be32(1);
485 return ar5523_cmd_write(ar, WDCMSG_SETUP_TX_QUEUE, &qinfo,
486 sizeof(qinfo), 0);
487}
488
489static int ar5523_switch_chan(struct ar5523 *ar)
490{
491 int error;
492
493 error = ar5523_set_chan(ar);
494 if (error) {
495 ar5523_err(ar, "could not set chan, error %d\n", error);
496 goto out_err;
497 }
498
499
500 error = ar5523_reset_tx_queues(ar);
501 if (error) {
502 ar5523_err(ar, "could not reset Tx queues, error %d\n",
503 error);
504 goto out_err;
505 }
506
507 error = ar5523_queue_init(ar);
508 if (error)
509 ar5523_err(ar, "could not init wme, error %d\n", error);
510
511out_err:
512 return error;
513}
514
515static void ar5523_rx_data_put(struct ar5523 *ar,
516 struct ar5523_rx_data *data)
517{
518 unsigned long flags;
519 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
520 list_move(&data->list, &ar->rx_data_free);
521 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
522}
523
524static void ar5523_data_rx_cb(struct urb *urb)
525{
526 struct ar5523_rx_data *data = urb->context;
527 struct ar5523 *ar = data->ar;
528 struct ar5523_rx_desc *desc;
529 struct ar5523_chunk *chunk;
530 struct ieee80211_hw *hw = ar->hw;
531 struct ieee80211_rx_status *rx_status;
532 u32 rxlen;
533 int usblen = urb->actual_length;
534 int hdrlen, pad;
535
536 ar5523_dbg(ar, "%s\n", __func__);
537
538 if (urb->status) {
539 if (urb->status != -ESHUTDOWN)
540 ar5523_err(ar, "%s: USB err: %d\n", __func__,
541 urb->status);
542 goto skip;
543 }
544
545 if (usblen < AR5523_MIN_RXBUFSZ) {
546 ar5523_err(ar, "RX: wrong xfer size (usblen=%d)\n", usblen);
547 goto skip;
548 }
549
550 chunk = (struct ar5523_chunk *) data->skb->data;
551
552 if (((chunk->flags & UATH_CFLAGS_FINAL) == 0) ||
553 chunk->seqnum != 0) {
554 ar5523_dbg(ar, "RX: No final flag. s: %d f: %02x l: %d\n",
555 chunk->seqnum, chunk->flags,
556 be16_to_cpu(chunk->length));
557 goto skip;
558 }
559
560
561 desc = (struct ar5523_rx_desc *)
562 (data->skb->data + usblen - sizeof(struct ar5523_rx_desc));
563
564 rxlen = be32_to_cpu(desc->len);
565 if (rxlen > ar->rxbufsz) {
566 ar5523_dbg(ar, "RX: Bad descriptor (len=%d)\n",
567 be32_to_cpu(desc->len));
568 goto skip;
569 }
570
571 if (!rxlen) {
572 ar5523_dbg(ar, "RX: rxlen is 0\n");
573 goto skip;
574 }
575
576 if (be32_to_cpu(desc->status) != 0) {
577 ar5523_dbg(ar, "Bad RX status (0x%x len = %d). Skip\n",
578 be32_to_cpu(desc->status), be32_to_cpu(desc->len));
579 goto skip;
580 }
581
582 skb_reserve(data->skb, sizeof(*chunk));
583 skb_put(data->skb, rxlen - sizeof(struct ar5523_rx_desc));
584
585 hdrlen = ieee80211_get_hdrlen_from_skb(data->skb);
586 if (!IS_ALIGNED(hdrlen, 4)) {
587 ar5523_dbg(ar, "eek, alignment workaround activated\n");
588 pad = ALIGN(hdrlen, 4) - hdrlen;
589 memmove(data->skb->data + pad, data->skb->data, hdrlen);
590 skb_pull(data->skb, pad);
591 skb_put(data->skb, pad);
592 }
593
594 rx_status = IEEE80211_SKB_RXCB(data->skb);
595 memset(rx_status, 0, sizeof(*rx_status));
596 rx_status->freq = be32_to_cpu(desc->channel);
597 rx_status->band = hw->conf.chandef.chan->band;
598 rx_status->signal = -95 + be32_to_cpu(desc->rssi);
599
600 ieee80211_rx_irqsafe(hw, data->skb);
601 data->skb = NULL;
602
603skip:
604 if (data->skb) {
605 dev_kfree_skb_irq(data->skb);
606 data->skb = NULL;
607 }
608
609 ar5523_rx_data_put(ar, data);
610 if (atomic_inc_return(&ar->rx_data_free_cnt) >=
611 AR5523_RX_DATA_REFILL_COUNT &&
612 test_bit(AR5523_HW_UP, &ar->flags))
613 queue_work(ar->wq, &ar->rx_refill_work);
614}
615
616static void ar5523_rx_refill_work(struct work_struct *work)
617{
618 struct ar5523 *ar = container_of(work, struct ar5523, rx_refill_work);
619 struct ar5523_rx_data *data;
620 unsigned long flags;
621 int error;
622
623 ar5523_dbg(ar, "%s\n", __func__);
624 do {
625 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
626
627 if (!list_empty(&ar->rx_data_free))
628 data = (struct ar5523_rx_data *) ar->rx_data_free.next;
629 else
630 data = NULL;
631 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
632
633 if (!data)
634 goto done;
635
636 data->skb = alloc_skb(ar->rxbufsz, GFP_KERNEL);
637 if (!data->skb) {
638 ar5523_err(ar, "could not allocate rx skbuff\n");
639 return;
640 }
641
642 usb_fill_bulk_urb(data->urb, ar->dev,
643 ar5523_data_rx_pipe(ar->dev), data->skb->data,
644 ar->rxbufsz, ar5523_data_rx_cb, data);
645
646 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
647 list_move(&data->list, &ar->rx_data_used);
648 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
649 atomic_dec(&ar->rx_data_free_cnt);
650
651 error = usb_submit_urb(data->urb, GFP_KERNEL);
652 if (error) {
653 kfree_skb(data->skb);
654 if (error != -ENODEV)
655 ar5523_err(ar, "Err sending rx data urb %d\n",
656 error);
657 ar5523_rx_data_put(ar, data);
658 atomic_inc(&ar->rx_data_free_cnt);
659 return;
660 }
661
662 } while (true);
663done:
664 return;
665}
666
667static void ar5523_cancel_rx_bufs(struct ar5523 *ar)
668{
669 struct ar5523_rx_data *data;
670 unsigned long flags;
671
672 do {
673 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
674 if (!list_empty(&ar->rx_data_used))
675 data = (struct ar5523_rx_data *) ar->rx_data_used.next;
676 else
677 data = NULL;
678 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
679
680 if (!data)
681 break;
682
683 usb_kill_urb(data->urb);
684 list_move(&data->list, &ar->rx_data_free);
685 atomic_inc(&ar->rx_data_free_cnt);
686 } while (data);
687}
688
689static void ar5523_free_rx_bufs(struct ar5523 *ar)
690{
691 struct ar5523_rx_data *data;
692
693 ar5523_cancel_rx_bufs(ar);
694 while (!list_empty(&ar->rx_data_free)) {
695 data = (struct ar5523_rx_data *) ar->rx_data_free.next;
696 list_del(&data->list);
697 usb_free_urb(data->urb);
698 }
699}
700
701static int ar5523_alloc_rx_bufs(struct ar5523 *ar)
702{
703 int i;
704
705 for (i = 0; i < AR5523_RX_DATA_COUNT; i++) {
706 struct ar5523_rx_data *data = &ar->rx_data[i];
707
708 data->ar = ar;
709 data->urb = usb_alloc_urb(0, GFP_KERNEL);
710 if (!data->urb)
711 goto err;
712 list_add_tail(&data->list, &ar->rx_data_free);
713 atomic_inc(&ar->rx_data_free_cnt);
714 }
715 return 0;
716
717err:
718 ar5523_free_rx_bufs(ar);
719 return -ENOMEM;
720}
721
722static void ar5523_data_tx_pkt_put(struct ar5523 *ar)
723{
724 atomic_dec(&ar->tx_nr_total);
725 if (!atomic_dec_return(&ar->tx_nr_pending)) {
726 del_timer(&ar->tx_wd_timer);
727 wake_up(&ar->tx_flush_waitq);
728 }
729
730 if (atomic_read(&ar->tx_nr_total) < AR5523_TX_DATA_RESTART_COUNT) {
731 ar5523_dbg(ar, "restart tx queue\n");
732 ieee80211_wake_queues(ar->hw);
733 }
734}
735
736static void ar5523_data_tx_cb(struct urb *urb)
737{
738 struct sk_buff *skb = urb->context;
739 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
740 struct ar5523_tx_data *data = (struct ar5523_tx_data *)
741 txi->driver_data;
742 struct ar5523 *ar = data->ar;
743 unsigned long flags;
744
745 ar5523_dbg(ar, "data tx urb completed: %d\n", urb->status);
746
747 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
748 list_del(&data->list);
749 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
750
751 if (urb->status) {
752 ar5523_dbg(ar, "%s: urb status: %d\n", __func__, urb->status);
753 ar5523_data_tx_pkt_put(ar);
754 ieee80211_free_txskb(ar->hw, skb);
755 } else {
756 skb_pull(skb, sizeof(struct ar5523_tx_desc) + sizeof(__be32));
757 ieee80211_tx_status_irqsafe(ar->hw, skb);
758 }
759 usb_free_urb(urb);
760}
761
762static void ar5523_tx(struct ieee80211_hw *hw,
763 struct ieee80211_tx_control *control,
764 struct sk_buff *skb)
765{
766 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
767 struct ar5523_tx_data *data = (struct ar5523_tx_data *)
768 txi->driver_data;
769 struct ar5523 *ar = hw->priv;
770 unsigned long flags;
771
772 ar5523_dbg(ar, "tx called\n");
773 if (atomic_inc_return(&ar->tx_nr_total) >= AR5523_TX_DATA_COUNT) {
774 ar5523_dbg(ar, "tx queue full\n");
775 ar5523_dbg(ar, "stop queues (tot %d pend %d)\n",
776 atomic_read(&ar->tx_nr_total),
777 atomic_read(&ar->tx_nr_pending));
778 ieee80211_stop_queues(hw);
779 }
780
781 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
782 list_add_tail(&data->list, &ar->tx_queue_pending);
783 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
784
785 ieee80211_queue_work(ar->hw, &ar->tx_work);
786}
787
788static void ar5523_tx_work_locked(struct ar5523 *ar)
789{
790 struct ar5523_tx_data *data;
791 struct ar5523_tx_desc *desc;
792 struct ar5523_chunk *chunk;
793 struct ieee80211_tx_info *txi;
794 struct urb *urb;
795 struct sk_buff *skb;
796 int error = 0, paylen;
797 u32 txqid;
798 unsigned long flags;
799
800 BUILD_BUG_ON(sizeof(struct ar5523_tx_data) >
801 IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
802
803 ar5523_dbg(ar, "%s\n", __func__);
804 do {
805 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
806 if (!list_empty(&ar->tx_queue_pending)) {
807 data = (struct ar5523_tx_data *)
808 ar->tx_queue_pending.next;
809 list_del(&data->list);
810 } else
811 data = NULL;
812 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
813
814 if (!data)
815 break;
816
817 txi = container_of((void *)data, struct ieee80211_tx_info,
818 driver_data);
819 txqid = 0;
820
821 skb = container_of((void *)txi, struct sk_buff, cb);
822 paylen = skb->len;
823
824 urb = usb_alloc_urb(0, GFP_KERNEL);
825 if (!urb) {
826 ieee80211_free_txskb(ar->hw, skb);
827 continue;
828 }
829
830 data->ar = ar;
831 data->urb = urb;
832
833 desc = skb_push(skb, sizeof(*desc));
834 chunk = skb_push(skb, sizeof(*chunk));
835
836 chunk->seqnum = 0;
837 chunk->flags = UATH_CFLAGS_FINAL;
838 chunk->length = cpu_to_be16(skb->len);
839
840 desc->msglen = cpu_to_be32(skb->len);
841 desc->msgid = AR5523_DATA_ID;
842 desc->buflen = cpu_to_be32(paylen);
843 desc->type = cpu_to_be32(WDCMSG_SEND);
844 desc->flags = cpu_to_be32(UATH_TX_NOTIFY);
845
846 if (test_bit(AR5523_CONNECTED, &ar->flags))
847 desc->connid = cpu_to_be32(AR5523_ID_BSS);
848 else
849 desc->connid = cpu_to_be32(AR5523_ID_BROADCAST);
850
851 if (txi->flags & IEEE80211_TX_CTL_USE_MINRATE)
852 txqid |= UATH_TXQID_MINRATE;
853
854 desc->txqid = cpu_to_be32(txqid);
855
856 urb->transfer_flags = URB_ZERO_PACKET;
857 usb_fill_bulk_urb(urb, ar->dev, ar5523_data_tx_pipe(ar->dev),
858 skb->data, skb->len, ar5523_data_tx_cb, skb);
859
860 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
861 list_add_tail(&data->list, &ar->tx_queue_submitted);
862 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
863 mod_timer(&ar->tx_wd_timer, jiffies + AR5523_TX_WD_TIMEOUT);
864 atomic_inc(&ar->tx_nr_pending);
865
866 ar5523_dbg(ar, "TX Frame (%d pending)\n",
867 atomic_read(&ar->tx_nr_pending));
868 error = usb_submit_urb(urb, GFP_KERNEL);
869 if (error) {
870 ar5523_err(ar, "error %d when submitting tx urb\n",
871 error);
872 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
873 list_del(&data->list);
874 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
875 atomic_dec(&ar->tx_nr_pending);
876 ar5523_data_tx_pkt_put(ar);
877 usb_free_urb(urb);
878 ieee80211_free_txskb(ar->hw, skb);
879 }
880 } while (true);
881}
882
883static void ar5523_tx_work(struct work_struct *work)
884{
885 struct ar5523 *ar = container_of(work, struct ar5523, tx_work);
886
887 ar5523_dbg(ar, "%s\n", __func__);
888 mutex_lock(&ar->mutex);
889 ar5523_tx_work_locked(ar);
890 mutex_unlock(&ar->mutex);
891}
892
893static void ar5523_tx_wd_timer(struct timer_list *t)
894{
895 struct ar5523 *ar = from_timer(ar, t, tx_wd_timer);
896
897 ar5523_dbg(ar, "TX watchdog timer triggered\n");
898 ieee80211_queue_work(ar->hw, &ar->tx_wd_work);
899}
900
901static void ar5523_tx_wd_work(struct work_struct *work)
902{
903 struct ar5523 *ar = container_of(work, struct ar5523, tx_wd_work);
904
905
906
907
908
909 mutex_lock(&ar->mutex);
910 ar5523_err(ar, "TX queue stuck (tot %d pend %d)\n",
911 atomic_read(&ar->tx_nr_total),
912 atomic_read(&ar->tx_nr_pending));
913
914 ar5523_err(ar, "Will restart dongle.\n");
915 ar5523_cmd_write(ar, WDCMSG_TARGET_RESET, NULL, 0, 0);
916 mutex_unlock(&ar->mutex);
917}
918
919static void ar5523_flush_tx(struct ar5523 *ar)
920{
921 ar5523_tx_work_locked(ar);
922
923
924 if (test_bit(AR5523_USB_DISCONNECTED, &ar->flags))
925 return;
926 if (!wait_event_timeout(ar->tx_flush_waitq,
927 !atomic_read(&ar->tx_nr_pending), AR5523_FLUSH_TIMEOUT))
928 ar5523_err(ar, "flush timeout (tot %d pend %d)\n",
929 atomic_read(&ar->tx_nr_total),
930 atomic_read(&ar->tx_nr_pending));
931}
932
933static void ar5523_free_tx_cmd(struct ar5523 *ar)
934{
935 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
936
937 usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ, cmd->buf_tx,
938 cmd->urb_tx->transfer_dma);
939 usb_free_urb(cmd->urb_tx);
940}
941
942static int ar5523_alloc_tx_cmd(struct ar5523 *ar)
943{
944 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
945
946 cmd->ar = ar;
947 init_completion(&cmd->done);
948
949 cmd->urb_tx = usb_alloc_urb(0, GFP_KERNEL);
950 if (!cmd->urb_tx)
951 return -ENOMEM;
952 cmd->buf_tx = usb_alloc_coherent(ar->dev, AR5523_MAX_TXCMDSZ,
953 GFP_KERNEL,
954 &cmd->urb_tx->transfer_dma);
955 if (!cmd->buf_tx) {
956 usb_free_urb(cmd->urb_tx);
957 return -ENOMEM;
958 }
959 return 0;
960}
961
962
963
964
965
966static void ar5523_stat_work(struct work_struct *work)
967{
968 struct ar5523 *ar = container_of(work, struct ar5523, stat_work.work);
969 int error;
970
971 ar5523_dbg(ar, "%s\n", __func__);
972 mutex_lock(&ar->mutex);
973
974
975
976
977
978 error = ar5523_cmd_write(ar, WDCMSG_TARGET_GET_STATS, NULL, 0, 0);
979 if (error)
980 ar5523_err(ar, "could not query stats, error %d\n", error);
981 mutex_unlock(&ar->mutex);
982 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, HZ);
983}
984
985
986
987
988static int ar5523_start(struct ieee80211_hw *hw)
989{
990 struct ar5523 *ar = hw->priv;
991 int error;
992 __be32 val;
993
994 ar5523_dbg(ar, "start called\n");
995
996 mutex_lock(&ar->mutex);
997 val = cpu_to_be32(0);
998 ar5523_cmd_write(ar, WDCMSG_BIND, &val, sizeof(val), 0);
999
1000
1001 ar5523_config_multi(ar, CFG_MAC_ADDR, &ar->hw->wiphy->perm_addr,
1002 ETH_ALEN);
1003
1004
1005 ar5523_config(ar, CFG_RATE_CONTROL_ENABLE, 0x00000001);
1006 ar5523_config(ar, CFG_DIVERSITY_CTL, 0x00000001);
1007 ar5523_config(ar, CFG_ABOLT, 0x0000003f);
1008 ar5523_config(ar, CFG_WME_ENABLED, 0x00000000);
1009
1010 ar5523_config(ar, CFG_SERVICE_TYPE, 1);
1011 ar5523_config(ar, CFG_TP_SCALE, 0x00000000);
1012 ar5523_config(ar, CFG_TPC_HALF_DBM5, 0x0000003c);
1013 ar5523_config(ar, CFG_TPC_HALF_DBM2, 0x0000003c);
1014 ar5523_config(ar, CFG_OVERRD_TX_POWER, 0x00000000);
1015 ar5523_config(ar, CFG_GMODE_PROTECTION, 0x00000000);
1016 ar5523_config(ar, CFG_GMODE_PROTECT_RATE_INDEX, 0x00000003);
1017 ar5523_config(ar, CFG_PROTECTION_TYPE, 0x00000000);
1018 ar5523_config(ar, CFG_MODE_CTS, 0x00000002);
1019
1020 error = ar5523_cmd_read(ar, WDCMSG_TARGET_START, NULL, 0,
1021 &val, sizeof(val), AR5523_CMD_FLAG_MAGIC);
1022 if (error) {
1023 ar5523_dbg(ar, "could not start target, error %d\n", error);
1024 goto err;
1025 }
1026 ar5523_dbg(ar, "WDCMSG_TARGET_START returns handle: 0x%x\n",
1027 be32_to_cpu(val));
1028
1029 ar5523_switch_chan(ar);
1030
1031 val = cpu_to_be32(TARGET_DEVICE_AWAKE);
1032 ar5523_cmd_write(ar, WDCMSG_SET_PWR_MODE, &val, sizeof(val), 0);
1033
1034 ar5523_cmd_write(ar, WDCMSG_RESET_KEY_CACHE, NULL, 0, 0);
1035
1036 set_bit(AR5523_HW_UP, &ar->flags);
1037 queue_work(ar->wq, &ar->rx_refill_work);
1038
1039
1040 ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1041 ar5523_set_rxfilter(ar,
1042 UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1043 UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON,
1044 UATH_FILTER_OP_SET);
1045
1046 ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_ON);
1047 ar5523_dbg(ar, "start OK\n");
1048
1049err:
1050 mutex_unlock(&ar->mutex);
1051 return error;
1052}
1053
1054static void ar5523_stop(struct ieee80211_hw *hw)
1055{
1056 struct ar5523 *ar = hw->priv;
1057
1058 ar5523_dbg(ar, "stop called\n");
1059
1060 cancel_delayed_work_sync(&ar->stat_work);
1061 mutex_lock(&ar->mutex);
1062 clear_bit(AR5523_HW_UP, &ar->flags);
1063
1064 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1065 ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_OFF);
1066
1067 ar5523_cmd_write(ar, WDCMSG_TARGET_STOP, NULL, 0, 0);
1068
1069 del_timer_sync(&ar->tx_wd_timer);
1070 cancel_work_sync(&ar->tx_wd_work);
1071 cancel_work_sync(&ar->rx_refill_work);
1072 ar5523_cancel_rx_bufs(ar);
1073 mutex_unlock(&ar->mutex);
1074}
1075
1076static int ar5523_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1077{
1078 struct ar5523 *ar = hw->priv;
1079 int ret;
1080
1081 ar5523_dbg(ar, "set_rts_threshold called\n");
1082 mutex_lock(&ar->mutex);
1083
1084 ret = ar5523_config(ar, CFG_USER_RTS_THRESHOLD, value);
1085
1086 mutex_unlock(&ar->mutex);
1087 return ret;
1088}
1089
1090static void ar5523_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1091 u32 queues, bool drop)
1092{
1093 struct ar5523 *ar = hw->priv;
1094
1095 ar5523_dbg(ar, "flush called\n");
1096 ar5523_flush_tx(ar);
1097}
1098
1099static int ar5523_add_interface(struct ieee80211_hw *hw,
1100 struct ieee80211_vif *vif)
1101{
1102 struct ar5523 *ar = hw->priv;
1103
1104 ar5523_dbg(ar, "add interface called\n");
1105
1106 if (ar->vif) {
1107 ar5523_dbg(ar, "invalid add_interface\n");
1108 return -EOPNOTSUPP;
1109 }
1110
1111 switch (vif->type) {
1112 case NL80211_IFTYPE_STATION:
1113 ar->vif = vif;
1114 break;
1115 default:
1116 return -EOPNOTSUPP;
1117 }
1118 return 0;
1119}
1120
1121static void ar5523_remove_interface(struct ieee80211_hw *hw,
1122 struct ieee80211_vif *vif)
1123{
1124 struct ar5523 *ar = hw->priv;
1125
1126 ar5523_dbg(ar, "remove interface called\n");
1127 ar->vif = NULL;
1128}
1129
1130static int ar5523_hwconfig(struct ieee80211_hw *hw, u32 changed)
1131{
1132 struct ar5523 *ar = hw->priv;
1133
1134 ar5523_dbg(ar, "config called\n");
1135 mutex_lock(&ar->mutex);
1136 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1137 ar5523_dbg(ar, "Do channel switch\n");
1138 ar5523_flush_tx(ar);
1139 ar5523_switch_chan(ar);
1140 }
1141 mutex_unlock(&ar->mutex);
1142 return 0;
1143}
1144
1145static int ar5523_get_wlan_mode(struct ar5523 *ar,
1146 struct ieee80211_bss_conf *bss_conf)
1147{
1148 struct ieee80211_supported_band *band;
1149 int bit;
1150 struct ieee80211_sta *sta;
1151 u32 sta_rate_set;
1152
1153 band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1154 sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1155 if (!sta) {
1156 ar5523_info(ar, "STA not found!\n");
1157 return WLAN_MODE_11b;
1158 }
1159 sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
1160
1161 for (bit = 0; bit < band->n_bitrates; bit++) {
1162 if (sta_rate_set & 1) {
1163 int rate = band->bitrates[bit].bitrate;
1164 switch (rate) {
1165 case 60:
1166 case 90:
1167 case 120:
1168 case 180:
1169 case 240:
1170 case 360:
1171 case 480:
1172 case 540:
1173 return WLAN_MODE_11g;
1174 }
1175 }
1176 sta_rate_set >>= 1;
1177 }
1178 return WLAN_MODE_11b;
1179}
1180
1181static void ar5523_create_rateset(struct ar5523 *ar,
1182 struct ieee80211_bss_conf *bss_conf,
1183 struct ar5523_cmd_rateset *rs,
1184 bool basic)
1185{
1186 struct ieee80211_supported_band *band;
1187 struct ieee80211_sta *sta;
1188 int bit, i = 0;
1189 u32 sta_rate_set, basic_rate_set;
1190
1191 sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1192 basic_rate_set = bss_conf->basic_rates;
1193 if (!sta) {
1194 ar5523_info(ar, "STA not found. Cannot set rates\n");
1195 sta_rate_set = bss_conf->basic_rates;
1196 } else
1197 sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
1198
1199 ar5523_dbg(ar, "sta rate_set = %08x\n", sta_rate_set);
1200
1201 band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1202 for (bit = 0; bit < band->n_bitrates; bit++) {
1203 BUG_ON(i >= AR5523_MAX_NRATES);
1204 ar5523_dbg(ar, "Considering rate %d : %d\n",
1205 band->bitrates[bit].hw_value, sta_rate_set & 1);
1206 if (sta_rate_set & 1) {
1207 rs->set[i] = band->bitrates[bit].hw_value;
1208 if (basic_rate_set & 1 && basic)
1209 rs->set[i] |= 0x80;
1210 i++;
1211 }
1212 sta_rate_set >>= 1;
1213 basic_rate_set >>= 1;
1214 }
1215
1216 rs->length = i;
1217}
1218
1219static int ar5523_set_basic_rates(struct ar5523 *ar,
1220 struct ieee80211_bss_conf *bss)
1221{
1222 struct ar5523_cmd_rates rates;
1223
1224 memset(&rates, 0, sizeof(rates));
1225 rates.connid = cpu_to_be32(2);
1226 rates.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1227 ar5523_create_rateset(ar, bss, &rates.rateset, true);
1228
1229 return ar5523_cmd_write(ar, WDCMSG_SET_BASIC_RATE, &rates,
1230 sizeof(rates), 0);
1231}
1232
1233static int ar5523_create_connection(struct ar5523 *ar,
1234 struct ieee80211_vif *vif,
1235 struct ieee80211_bss_conf *bss)
1236{
1237 struct ar5523_cmd_create_connection create;
1238 int wlan_mode;
1239
1240 memset(&create, 0, sizeof(create));
1241 create.connid = cpu_to_be32(2);
1242 create.bssid = cpu_to_be32(0);
1243
1244 create.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1245
1246 ar5523_create_rateset(ar, bss, &create.connattr.rateset, false);
1247
1248 wlan_mode = ar5523_get_wlan_mode(ar, bss);
1249 create.connattr.wlanmode = cpu_to_be32(wlan_mode);
1250
1251 return ar5523_cmd_write(ar, WDCMSG_CREATE_CONNECTION, &create,
1252 sizeof(create), 0);
1253}
1254
1255static int ar5523_write_associd(struct ar5523 *ar,
1256 struct ieee80211_bss_conf *bss)
1257{
1258 struct ar5523_cmd_set_associd associd;
1259
1260 memset(&associd, 0, sizeof(associd));
1261 associd.defaultrateix = cpu_to_be32(0);
1262 associd.associd = cpu_to_be32(bss->aid);
1263 associd.timoffset = cpu_to_be32(0x3b);
1264 memcpy(associd.bssid, bss->bssid, ETH_ALEN);
1265 return ar5523_cmd_write(ar, WDCMSG_WRITE_ASSOCID, &associd,
1266 sizeof(associd), 0);
1267}
1268
1269static void ar5523_bss_info_changed(struct ieee80211_hw *hw,
1270 struct ieee80211_vif *vif,
1271 struct ieee80211_bss_conf *bss,
1272 u32 changed)
1273{
1274 struct ar5523 *ar = hw->priv;
1275 int error;
1276
1277 ar5523_dbg(ar, "bss_info_changed called\n");
1278 mutex_lock(&ar->mutex);
1279
1280 if (!(changed & BSS_CHANGED_ASSOC))
1281 goto out_unlock;
1282
1283 if (bss->assoc) {
1284 error = ar5523_create_connection(ar, vif, bss);
1285 if (error) {
1286 ar5523_err(ar, "could not create connection\n");
1287 goto out_unlock;
1288 }
1289
1290 error = ar5523_set_basic_rates(ar, bss);
1291 if (error) {
1292 ar5523_err(ar, "could not set negotiated rate set\n");
1293 goto out_unlock;
1294 }
1295
1296 error = ar5523_write_associd(ar, bss);
1297 if (error) {
1298 ar5523_err(ar, "could not set association\n");
1299 goto out_unlock;
1300 }
1301
1302
1303 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_ON);
1304 set_bit(AR5523_CONNECTED, &ar->flags);
1305 ieee80211_queue_delayed_work(hw, &ar->stat_work, HZ);
1306
1307 } else {
1308 cancel_delayed_work(&ar->stat_work);
1309 clear_bit(AR5523_CONNECTED, &ar->flags);
1310 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1311 }
1312
1313out_unlock:
1314 mutex_unlock(&ar->mutex);
1315
1316}
1317
1318#define AR5523_SUPPORTED_FILTERS (FIF_ALLMULTI | \
1319 FIF_FCSFAIL | \
1320 FIF_OTHER_BSS)
1321
1322static void ar5523_configure_filter(struct ieee80211_hw *hw,
1323 unsigned int changed_flags,
1324 unsigned int *total_flags,
1325 u64 multicast)
1326{
1327 struct ar5523 *ar = hw->priv;
1328 u32 filter = 0;
1329
1330 ar5523_dbg(ar, "configure_filter called\n");
1331 mutex_lock(&ar->mutex);
1332 ar5523_flush_tx(ar);
1333
1334 *total_flags &= AR5523_SUPPORTED_FILTERS;
1335
1336
1337
1338
1339
1340 filter |= UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1341 UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON |
1342 UATH_FILTER_RX_PROM;
1343
1344 ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1345 ar5523_set_rxfilter(ar, filter, UATH_FILTER_OP_SET);
1346
1347 mutex_unlock(&ar->mutex);
1348}
1349
1350static const struct ieee80211_ops ar5523_ops = {
1351 .start = ar5523_start,
1352 .stop = ar5523_stop,
1353 .tx = ar5523_tx,
1354 .set_rts_threshold = ar5523_set_rts_threshold,
1355 .add_interface = ar5523_add_interface,
1356 .remove_interface = ar5523_remove_interface,
1357 .config = ar5523_hwconfig,
1358 .bss_info_changed = ar5523_bss_info_changed,
1359 .configure_filter = ar5523_configure_filter,
1360 .flush = ar5523_flush,
1361};
1362
1363static int ar5523_host_available(struct ar5523 *ar)
1364{
1365 struct ar5523_cmd_host_available setup;
1366
1367
1368 setup.sw_ver_major = cpu_to_be32(ATH_SW_VER_MAJOR);
1369 setup.sw_ver_minor = cpu_to_be32(ATH_SW_VER_MINOR);
1370 setup.sw_ver_patch = cpu_to_be32(ATH_SW_VER_PATCH);
1371 setup.sw_ver_build = cpu_to_be32(ATH_SW_VER_BUILD);
1372 return ar5523_cmd_read(ar, WDCMSG_HOST_AVAILABLE,
1373 &setup, sizeof(setup), NULL, 0, 0);
1374}
1375
1376static int ar5523_get_devstatus(struct ar5523 *ar)
1377{
1378 u8 macaddr[ETH_ALEN];
1379 int error;
1380
1381
1382 error = ar5523_get_status(ar, ST_MAC_ADDR, macaddr, ETH_ALEN);
1383 if (error) {
1384 ar5523_err(ar, "could not read MAC address\n");
1385 return error;
1386 }
1387
1388 SET_IEEE80211_PERM_ADDR(ar->hw, macaddr);
1389
1390 error = ar5523_get_status(ar, ST_SERIAL_NUMBER,
1391 &ar->serial[0], sizeof(ar->serial));
1392 if (error) {
1393 ar5523_err(ar, "could not read device serial number\n");
1394 return error;
1395 }
1396 return 0;
1397}
1398
1399#define AR5523_SANE_RXBUFSZ 2000
1400
1401static int ar5523_get_max_rxsz(struct ar5523 *ar)
1402{
1403 int error;
1404 __be32 rxsize;
1405
1406
1407 error = ar5523_get_status(ar, ST_WDC_TRANSPORT_CHUNK_SIZE, &rxsize,
1408 sizeof(rxsize));
1409 if (error != 0) {
1410 ar5523_err(ar, "could not read max RX size\n");
1411 return error;
1412 }
1413
1414 ar->rxbufsz = be32_to_cpu(rxsize);
1415
1416 if (!ar->rxbufsz || ar->rxbufsz > AR5523_SANE_RXBUFSZ) {
1417 ar5523_err(ar, "Bad rxbufsz from device. Using %d instead\n",
1418 AR5523_SANE_RXBUFSZ);
1419 ar->rxbufsz = AR5523_SANE_RXBUFSZ;
1420 }
1421
1422 ar5523_dbg(ar, "Max RX buf size: %d\n", ar->rxbufsz);
1423 return 0;
1424}
1425
1426
1427
1428
1429
1430static const struct ieee80211_rate ar5523_rates[] = {
1431 { .bitrate = 10, .hw_value = 2, },
1432 { .bitrate = 20, .hw_value = 4 },
1433 { .bitrate = 55, .hw_value = 11, },
1434 { .bitrate = 110, .hw_value = 22, },
1435 { .bitrate = 60, .hw_value = 12, },
1436 { .bitrate = 90, .hw_value = 18, },
1437 { .bitrate = 120, .hw_value = 24, },
1438 { .bitrate = 180, .hw_value = 36, },
1439 { .bitrate = 240, .hw_value = 48, },
1440 { .bitrate = 360, .hw_value = 72, },
1441 { .bitrate = 480, .hw_value = 96, },
1442 { .bitrate = 540, .hw_value = 108, },
1443};
1444
1445static const struct ieee80211_channel ar5523_channels[] = {
1446 { .center_freq = 2412 },
1447 { .center_freq = 2417 },
1448 { .center_freq = 2422 },
1449 { .center_freq = 2427 },
1450 { .center_freq = 2432 },
1451 { .center_freq = 2437 },
1452 { .center_freq = 2442 },
1453 { .center_freq = 2447 },
1454 { .center_freq = 2452 },
1455 { .center_freq = 2457 },
1456 { .center_freq = 2462 },
1457 { .center_freq = 2467 },
1458 { .center_freq = 2472 },
1459 { .center_freq = 2484 },
1460};
1461
1462static int ar5523_init_modes(struct ar5523 *ar)
1463{
1464 BUILD_BUG_ON(sizeof(ar->channels) != sizeof(ar5523_channels));
1465 BUILD_BUG_ON(sizeof(ar->rates) != sizeof(ar5523_rates));
1466
1467 memcpy(ar->channels, ar5523_channels, sizeof(ar5523_channels));
1468 memcpy(ar->rates, ar5523_rates, sizeof(ar5523_rates));
1469
1470 ar->band.band = NL80211_BAND_2GHZ;
1471 ar->band.channels = ar->channels;
1472 ar->band.n_channels = ARRAY_SIZE(ar5523_channels);
1473 ar->band.bitrates = ar->rates;
1474 ar->band.n_bitrates = ARRAY_SIZE(ar5523_rates);
1475 ar->hw->wiphy->bands[NL80211_BAND_2GHZ] = &ar->band;
1476 return 0;
1477}
1478
1479
1480
1481
1482
1483
1484static int ar5523_load_firmware(struct usb_device *dev)
1485{
1486 struct ar5523_fwblock *txblock, *rxblock;
1487 const struct firmware *fw;
1488 void *fwbuf;
1489 int len, offset;
1490 int foolen;
1491 int error = -ENXIO;
1492
1493 if (request_firmware(&fw, AR5523_FIRMWARE_FILE, &dev->dev)) {
1494 dev_err(&dev->dev, "no firmware found: %s\n",
1495 AR5523_FIRMWARE_FILE);
1496 return -ENOENT;
1497 }
1498
1499 txblock = kmalloc(sizeof(*txblock), GFP_KERNEL);
1500 if (!txblock)
1501 goto out;
1502
1503 rxblock = kmalloc(sizeof(*rxblock), GFP_KERNEL);
1504 if (!rxblock)
1505 goto out_free_txblock;
1506
1507 fwbuf = kmalloc(AR5523_MAX_FWBLOCK_SIZE, GFP_KERNEL);
1508 if (!fwbuf)
1509 goto out_free_rxblock;
1510
1511 memset(txblock, 0, sizeof(struct ar5523_fwblock));
1512 txblock->flags = cpu_to_be32(AR5523_WRITE_BLOCK);
1513 txblock->total = cpu_to_be32(fw->size);
1514
1515 offset = 0;
1516 len = fw->size;
1517 while (len > 0) {
1518 int mlen = min(len, AR5523_MAX_FWBLOCK_SIZE);
1519
1520 txblock->remain = cpu_to_be32(len - mlen);
1521 txblock->len = cpu_to_be32(mlen);
1522
1523
1524 error = usb_bulk_msg(dev, ar5523_cmd_tx_pipe(dev),
1525 txblock, sizeof(*txblock), &foolen,
1526 AR5523_CMD_TIMEOUT);
1527 if (error) {
1528 dev_err(&dev->dev,
1529 "could not send firmware block info\n");
1530 goto out_free_fwbuf;
1531 }
1532
1533
1534 memcpy(fwbuf, fw->data + offset, mlen);
1535 error = usb_bulk_msg(dev, ar5523_data_tx_pipe(dev),
1536 fwbuf, mlen, &foolen,
1537 AR5523_DATA_TIMEOUT);
1538 if (error) {
1539 dev_err(&dev->dev,
1540 "could not send firmware block data\n");
1541 goto out_free_fwbuf;
1542 }
1543
1544
1545 error = usb_bulk_msg(dev, ar5523_cmd_rx_pipe(dev),
1546 rxblock, sizeof(*rxblock), &foolen,
1547 AR5523_CMD_TIMEOUT);
1548 if (error) {
1549 dev_err(&dev->dev,
1550 "could not read firmware answer\n");
1551 goto out_free_fwbuf;
1552 }
1553
1554 len -= mlen;
1555 offset += mlen;
1556 }
1557
1558
1559
1560
1561
1562 error = -ENXIO;
1563
1564 out_free_fwbuf:
1565 kfree(fwbuf);
1566 out_free_rxblock:
1567 kfree(rxblock);
1568 out_free_txblock:
1569 kfree(txblock);
1570 out:
1571 release_firmware(fw);
1572 return error;
1573}
1574
1575static int ar5523_probe(struct usb_interface *intf,
1576 const struct usb_device_id *id)
1577{
1578 struct usb_device *dev = interface_to_usbdev(intf);
1579 struct ieee80211_hw *hw;
1580 struct ar5523 *ar;
1581 int error = -ENOMEM;
1582
1583
1584
1585
1586
1587
1588 if (id->driver_info & AR5523_FLAG_PRE_FIRMWARE)
1589 return ar5523_load_firmware(dev);
1590
1591
1592 hw = ieee80211_alloc_hw(sizeof(*ar), &ar5523_ops);
1593 if (!hw)
1594 goto out;
1595 SET_IEEE80211_DEV(hw, &intf->dev);
1596
1597 ar = hw->priv;
1598 ar->hw = hw;
1599 ar->dev = dev;
1600 mutex_init(&ar->mutex);
1601
1602 INIT_DELAYED_WORK(&ar->stat_work, ar5523_stat_work);
1603 timer_setup(&ar->tx_wd_timer, ar5523_tx_wd_timer, 0);
1604 INIT_WORK(&ar->tx_wd_work, ar5523_tx_wd_work);
1605 INIT_WORK(&ar->tx_work, ar5523_tx_work);
1606 INIT_LIST_HEAD(&ar->tx_queue_pending);
1607 INIT_LIST_HEAD(&ar->tx_queue_submitted);
1608 spin_lock_init(&ar->tx_data_list_lock);
1609 atomic_set(&ar->tx_nr_total, 0);
1610 atomic_set(&ar->tx_nr_pending, 0);
1611 init_waitqueue_head(&ar->tx_flush_waitq);
1612
1613 atomic_set(&ar->rx_data_free_cnt, 0);
1614 INIT_WORK(&ar->rx_refill_work, ar5523_rx_refill_work);
1615 INIT_LIST_HEAD(&ar->rx_data_free);
1616 INIT_LIST_HEAD(&ar->rx_data_used);
1617 spin_lock_init(&ar->rx_data_list_lock);
1618
1619 ar->wq = create_singlethread_workqueue("ar5523");
1620 if (!ar->wq) {
1621 ar5523_err(ar, "Could not create wq\n");
1622 goto out_free_ar;
1623 }
1624
1625 error = ar5523_alloc_rx_bufs(ar);
1626 if (error) {
1627 ar5523_err(ar, "Could not allocate rx buffers\n");
1628 goto out_free_wq;
1629 }
1630
1631 error = ar5523_alloc_rx_cmd(ar);
1632 if (error) {
1633 ar5523_err(ar, "Could not allocate rx command buffers\n");
1634 goto out_free_rx_bufs;
1635 }
1636
1637 error = ar5523_alloc_tx_cmd(ar);
1638 if (error) {
1639 ar5523_err(ar, "Could not allocate tx command buffers\n");
1640 goto out_free_rx_cmd;
1641 }
1642
1643 error = ar5523_submit_rx_cmd(ar);
1644 if (error) {
1645 ar5523_err(ar, "Failed to submit rx cmd\n");
1646 goto out_free_tx_cmd;
1647 }
1648
1649
1650
1651
1652 error = ar5523_host_available(ar);
1653 if (error) {
1654 ar5523_err(ar, "could not initialize adapter\n");
1655 goto out_cancel_rx_cmd;
1656 }
1657
1658 error = ar5523_get_max_rxsz(ar);
1659 if (error) {
1660 ar5523_err(ar, "could not get caps from adapter\n");
1661 goto out_cancel_rx_cmd;
1662 }
1663
1664 error = ar5523_get_devcap(ar);
1665 if (error) {
1666 ar5523_err(ar, "could not get caps from adapter\n");
1667 goto out_cancel_rx_cmd;
1668 }
1669
1670 error = ar5523_get_devstatus(ar);
1671 if (error != 0) {
1672 ar5523_err(ar, "could not get device status\n");
1673 goto out_cancel_rx_cmd;
1674 }
1675
1676 ar5523_info(ar, "MAC/BBP AR5523, RF AR%c112\n",
1677 (id->driver_info & AR5523_FLAG_ABG) ? '5' : '2');
1678
1679 ar->vif = NULL;
1680 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1681 ieee80211_hw_set(hw, RX_INCLUDES_FCS);
1682 ieee80211_hw_set(hw, SIGNAL_DBM);
1683 hw->extra_tx_headroom = sizeof(struct ar5523_tx_desc) +
1684 sizeof(struct ar5523_chunk);
1685 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1686 hw->queues = 1;
1687
1688 error = ar5523_init_modes(ar);
1689 if (error)
1690 goto out_cancel_rx_cmd;
1691
1692 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1693
1694 usb_set_intfdata(intf, hw);
1695
1696 error = ieee80211_register_hw(hw);
1697 if (error) {
1698 ar5523_err(ar, "could not register device\n");
1699 goto out_cancel_rx_cmd;
1700 }
1701
1702 ar5523_info(ar, "Found and initialized AR5523 device\n");
1703 return 0;
1704
1705out_cancel_rx_cmd:
1706 ar5523_cancel_rx_cmd(ar);
1707out_free_tx_cmd:
1708 ar5523_free_tx_cmd(ar);
1709out_free_rx_cmd:
1710 ar5523_free_rx_cmd(ar);
1711out_free_rx_bufs:
1712 ar5523_free_rx_bufs(ar);
1713out_free_wq:
1714 destroy_workqueue(ar->wq);
1715out_free_ar:
1716 ieee80211_free_hw(hw);
1717out:
1718 return error;
1719}
1720
1721static void ar5523_disconnect(struct usb_interface *intf)
1722{
1723 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1724 struct ar5523 *ar = hw->priv;
1725
1726 ar5523_dbg(ar, "detaching\n");
1727 set_bit(AR5523_USB_DISCONNECTED, &ar->flags);
1728
1729 ieee80211_unregister_hw(hw);
1730
1731 ar5523_cancel_rx_cmd(ar);
1732 ar5523_free_tx_cmd(ar);
1733 ar5523_free_rx_cmd(ar);
1734 ar5523_free_rx_bufs(ar);
1735
1736 destroy_workqueue(ar->wq);
1737
1738 ieee80211_free_hw(hw);
1739 usb_set_intfdata(intf, NULL);
1740}
1741
1742#define AR5523_DEVICE_UG(vendor, device) \
1743 { USB_DEVICE((vendor), (device)) }, \
1744 { USB_DEVICE((vendor), (device) + 1), \
1745 .driver_info = AR5523_FLAG_PRE_FIRMWARE }
1746#define AR5523_DEVICE_UX(vendor, device) \
1747 { USB_DEVICE((vendor), (device)), \
1748 .driver_info = AR5523_FLAG_ABG }, \
1749 { USB_DEVICE((vendor), (device) + 1), \
1750 .driver_info = AR5523_FLAG_ABG|AR5523_FLAG_PRE_FIRMWARE }
1751
1752static const struct usb_device_id ar5523_id_table[] = {
1753 AR5523_DEVICE_UG(0x168c, 0x0001),
1754 AR5523_DEVICE_UG(0x0cf3, 0x0001),
1755 AR5523_DEVICE_UG(0x0cf3, 0x0003),
1756 AR5523_DEVICE_UX(0x0cf3, 0x0005),
1757 AR5523_DEVICE_UG(0x0d8e, 0x7801),
1758 AR5523_DEVICE_UX(0x0d8e, 0x7811),
1759 AR5523_DEVICE_UX(0x2001, 0x3a00),
1760 AR5523_DEVICE_UG(0x2001, 0x3a02),
1761 AR5523_DEVICE_UX(0x2001, 0x3a04),
1762 AR5523_DEVICE_UG(0x07d1, 0x3a07),
1763 AR5523_DEVICE_UG(0x1690, 0x0712),
1764 AR5523_DEVICE_UG(0x1690, 0x0710),
1765 AR5523_DEVICE_UG(0x129b, 0x160b),
1766
1767 AR5523_DEVICE_UG(0x16ab, 0x7801),
1768 AR5523_DEVICE_UX(0x16ab, 0x7811),
1769 AR5523_DEVICE_UG(0x0d8e, 0x7802),
1770 AR5523_DEVICE_UX(0x0846, 0x4300),
1771 AR5523_DEVICE_UG(0x0846, 0x4250),
1772 AR5523_DEVICE_UG(0x0846, 0x5f00),
1773 AR5523_DEVICE_UG(0x083a, 0x4506),
1774
1775 AR5523_DEVICE_UG(0x157e, 0x3006),
1776 AR5523_DEVICE_UX(0x157e, 0x3205),
1777 AR5523_DEVICE_UG(0x157e, 0x3006),
1778 AR5523_DEVICE_UG(0x1435, 0x0826),
1779 AR5523_DEVICE_UX(0x1435, 0x0828),
1780 AR5523_DEVICE_UG(0x0cde, 0x0012),
1781 AR5523_DEVICE_UG(0x1385, 0x4250),
1782 AR5523_DEVICE_UG(0x1385, 0x5f00),
1783 AR5523_DEVICE_UG(0x1385, 0x5f02),
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);
1799
