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27#include <linux/compiler.h>
28#include <linux/init.h>
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/list.h>
32#include <linux/completion.h>
33#include <linux/firmware.h>
34#include <linux/skbuff.h>
35#include <linux/usb.h>
36#include <net/mac80211.h>
37
38#include "ar5523.h"
39#include "ar5523_hw.h"
40
41
42
43
44
45
46static int ar5523_submit_rx_cmd(struct ar5523 *ar);
47static void ar5523_data_tx_pkt_put(struct ar5523 *ar);
48
49static void ar5523_read_reply(struct ar5523 *ar, struct ar5523_cmd_hdr *hdr,
50 struct ar5523_tx_cmd *cmd)
51{
52 int dlen, olen;
53 __be32 *rp;
54
55 dlen = be32_to_cpu(hdr->len) - sizeof(*hdr);
56
57 if (dlen < 0) {
58 WARN_ON(1);
59 goto out;
60 }
61
62 ar5523_dbg(ar, "Code = %d len = %d\n", be32_to_cpu(hdr->code) & 0xff,
63 dlen);
64
65 rp = (__be32 *)(hdr + 1);
66 if (dlen >= sizeof(u32)) {
67 olen = be32_to_cpu(rp[0]);
68 dlen -= sizeof(u32);
69 if (olen == 0) {
70
71 olen = sizeof(u32);
72 }
73 } else
74 olen = 0;
75
76 if (cmd->odata) {
77 if (cmd->olen < olen) {
78 ar5523_err(ar, "olen to small %d < %d\n",
79 cmd->olen, olen);
80 cmd->olen = 0;
81 cmd->res = -EOVERFLOW;
82 } else {
83 cmd->olen = olen;
84 memcpy(cmd->odata, &rp[1], olen);
85 cmd->res = 0;
86 }
87 }
88
89out:
90 complete(&cmd->done);
91}
92
93static void ar5523_cmd_rx_cb(struct urb *urb)
94{
95 struct ar5523 *ar = urb->context;
96 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
97 struct ar5523_cmd_hdr *hdr = ar->rx_cmd_buf;
98 int dlen;
99 u32 code, hdrlen;
100
101 if (urb->status) {
102 if (urb->status != -ESHUTDOWN)
103 ar5523_err(ar, "RX USB error %d.\n", urb->status);
104 goto skip;
105 }
106
107 if (urb->actual_length < sizeof(struct ar5523_cmd_hdr)) {
108 ar5523_err(ar, "RX USB to short.\n");
109 goto skip;
110 }
111
112 ar5523_dbg(ar, "%s code %02x priv %d\n", __func__,
113 be32_to_cpu(hdr->code) & 0xff, hdr->priv);
114
115 code = be32_to_cpu(hdr->code);
116 hdrlen = be32_to_cpu(hdr->len);
117
118 switch (code & 0xff) {
119 default:
120
121 if (hdr->priv != AR5523_CMD_ID) {
122 ar5523_err(ar, "Unexpected command id: %02x\n",
123 code & 0xff);
124 goto skip;
125 }
126 ar5523_read_reply(ar, hdr, cmd);
127 break;
128
129 case WDCMSG_DEVICE_AVAIL:
130 ar5523_dbg(ar, "WDCMSG_DEVICE_AVAIL\n");
131 cmd->res = 0;
132 cmd->olen = 0;
133 complete(&cmd->done);
134 break;
135
136 case WDCMSG_SEND_COMPLETE:
137 ar5523_dbg(ar, "WDCMSG_SEND_COMPLETE: %d pending\n",
138 atomic_read(&ar->tx_nr_pending));
139 if (!test_bit(AR5523_HW_UP, &ar->flags))
140 ar5523_dbg(ar, "Unexpected WDCMSG_SEND_COMPLETE\n");
141 else {
142 mod_timer(&ar->tx_wd_timer,
143 jiffies + AR5523_TX_WD_TIMEOUT);
144 ar5523_data_tx_pkt_put(ar);
145
146 }
147 break;
148
149 case WDCMSG_TARGET_START:
150
151
152 dlen = hdrlen - sizeof(*hdr);
153 if (dlen != (int)sizeof(u32)) {
154 ar5523_err(ar, "Invalid reply to WDCMSG_TARGET_START");
155 return;
156 }
157 memcpy(cmd->odata, hdr + 1, sizeof(u32));
158 cmd->olen = sizeof(u32);
159 cmd->res = 0;
160 complete(&cmd->done);
161 break;
162
163 case WDCMSG_STATS_UPDATE:
164 ar5523_dbg(ar, "WDCMSG_STATS_UPDATE\n");
165 break;
166 }
167
168skip:
169 ar5523_submit_rx_cmd(ar);
170}
171
172static int ar5523_alloc_rx_cmd(struct ar5523 *ar)
173{
174 ar->rx_cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
175 if (!ar->rx_cmd_urb)
176 return -ENOMEM;
177
178 ar->rx_cmd_buf = usb_alloc_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
179 GFP_KERNEL,
180 &ar->rx_cmd_urb->transfer_dma);
181 if (!ar->rx_cmd_buf) {
182 usb_free_urb(ar->rx_cmd_urb);
183 return -ENOMEM;
184 }
185 return 0;
186}
187
188static void ar5523_cancel_rx_cmd(struct ar5523 *ar)
189{
190 usb_kill_urb(ar->rx_cmd_urb);
191}
192
193static void ar5523_free_rx_cmd(struct ar5523 *ar)
194{
195 usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
196 ar->rx_cmd_buf, ar->rx_cmd_urb->transfer_dma);
197 usb_free_urb(ar->rx_cmd_urb);
198}
199
200static int ar5523_submit_rx_cmd(struct ar5523 *ar)
201{
202 int error;
203
204 usb_fill_bulk_urb(ar->rx_cmd_urb, ar->dev,
205 ar5523_cmd_rx_pipe(ar->dev), ar->rx_cmd_buf,
206 AR5523_MAX_RXCMDSZ, ar5523_cmd_rx_cb, ar);
207 ar->rx_cmd_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
208
209 error = usb_submit_urb(ar->rx_cmd_urb, GFP_ATOMIC);
210 if (error) {
211 if (error != -ENODEV)
212 ar5523_err(ar, "error %d when submitting rx urb\n",
213 error);
214 return error;
215 }
216 return 0;
217}
218
219
220
221
222static void ar5523_cmd_tx_cb(struct urb *urb)
223{
224 struct ar5523_tx_cmd *cmd = urb->context;
225 struct ar5523 *ar = cmd->ar;
226
227 if (urb->status) {
228 ar5523_err(ar, "Failed to TX command. Status = %d\n",
229 urb->status);
230 cmd->res = urb->status;
231 complete(&cmd->done);
232 return;
233 }
234
235 if (!(cmd->flags & AR5523_CMD_FLAG_READ)) {
236 cmd->res = 0;
237 complete(&cmd->done);
238 }
239}
240
241static int ar5523_cmd(struct ar5523 *ar, u32 code, const void *idata,
242 int ilen, void *odata, int olen, int flags)
243{
244 struct ar5523_cmd_hdr *hdr;
245 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
246 int xferlen, error;
247
248
249 xferlen = (sizeof(struct ar5523_cmd_hdr) + ilen + 3) & ~3;
250
251 hdr = (struct ar5523_cmd_hdr *)cmd->buf_tx;
252 memset(hdr, 0, sizeof(struct ar5523_cmd_hdr));
253 hdr->len = cpu_to_be32(xferlen);
254 hdr->code = cpu_to_be32(code);
255 hdr->priv = AR5523_CMD_ID;
256
257 if (flags & AR5523_CMD_FLAG_MAGIC)
258 hdr->magic = cpu_to_be32(1 << 24);
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 ar5523_err(ar, "could not allocate rx data urb\n");
712 goto err;
713 }
714 list_add_tail(&data->list, &ar->rx_data_free);
715 atomic_inc(&ar->rx_data_free_cnt);
716 }
717 return 0;
718
719err:
720 ar5523_free_rx_bufs(ar);
721 return -ENOMEM;
722}
723
724static void ar5523_data_tx_pkt_put(struct ar5523 *ar)
725{
726 atomic_dec(&ar->tx_nr_total);
727 if (!atomic_dec_return(&ar->tx_nr_pending)) {
728 del_timer(&ar->tx_wd_timer);
729 wake_up(&ar->tx_flush_waitq);
730 }
731
732 if (atomic_read(&ar->tx_nr_total) < AR5523_TX_DATA_RESTART_COUNT) {
733 ar5523_dbg(ar, "restart tx queue\n");
734 ieee80211_wake_queues(ar->hw);
735 }
736}
737
738static void ar5523_data_tx_cb(struct urb *urb)
739{
740 struct sk_buff *skb = urb->context;
741 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
742 struct ar5523_tx_data *data = (struct ar5523_tx_data *)
743 txi->driver_data;
744 struct ar5523 *ar = data->ar;
745 unsigned long flags;
746
747 ar5523_dbg(ar, "data tx urb completed: %d\n", urb->status);
748
749 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
750 list_del(&data->list);
751 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
752
753 if (urb->status) {
754 ar5523_dbg(ar, "%s: urb status: %d\n", __func__, urb->status);
755 ar5523_data_tx_pkt_put(ar);
756 ieee80211_free_txskb(ar->hw, skb);
757 } else {
758 skb_pull(skb, sizeof(struct ar5523_tx_desc) + sizeof(__be32));
759 ieee80211_tx_status_irqsafe(ar->hw, skb);
760 }
761 usb_free_urb(urb);
762}
763
764static void ar5523_tx(struct ieee80211_hw *hw,
765 struct ieee80211_tx_control *control,
766 struct sk_buff *skb)
767{
768 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
769 struct ar5523_tx_data *data = (struct ar5523_tx_data *)
770 txi->driver_data;
771 struct ar5523 *ar = hw->priv;
772 unsigned long flags;
773
774 ar5523_dbg(ar, "tx called\n");
775 if (atomic_inc_return(&ar->tx_nr_total) >= AR5523_TX_DATA_COUNT) {
776 ar5523_dbg(ar, "tx queue full\n");
777 ar5523_dbg(ar, "stop queues (tot %d pend %d)\n",
778 atomic_read(&ar->tx_nr_total),
779 atomic_read(&ar->tx_nr_pending));
780 ieee80211_stop_queues(hw);
781 }
782
783 data->skb = skb;
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
792static 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 skb = data->skb;
822 txqid = 0;
823 txi = IEEE80211_SKB_CB(skb);
824 paylen = skb->len;
825 urb = usb_alloc_urb(0, GFP_KERNEL);
826 if (!urb) {
827 ar5523_err(ar, "Failed to allocate TX urb\n");
828 ieee80211_free_txskb(ar->hw, skb);
829 continue;
830 }
831
832 data->ar = ar;
833 data->urb = urb;
834
835 desc = (struct ar5523_tx_desc *)skb_push(skb, sizeof(*desc));
836 chunk = (struct ar5523_chunk *)skb_push(skb, sizeof(*chunk));
837
838 chunk->seqnum = 0;
839 chunk->flags = UATH_CFLAGS_FINAL;
840 chunk->length = cpu_to_be16(skb->len);
841
842 desc->msglen = cpu_to_be32(skb->len);
843 desc->msgid = AR5523_DATA_ID;
844 desc->buflen = cpu_to_be32(paylen);
845 desc->type = cpu_to_be32(WDCMSG_SEND);
846 desc->flags = cpu_to_be32(UATH_TX_NOTIFY);
847
848 if (test_bit(AR5523_CONNECTED, &ar->flags))
849 desc->connid = cpu_to_be32(AR5523_ID_BSS);
850 else
851 desc->connid = cpu_to_be32(AR5523_ID_BROADCAST);
852
853 if (txi->flags & IEEE80211_TX_CTL_USE_MINRATE)
854 txqid |= UATH_TXQID_MINRATE;
855
856 desc->txqid = cpu_to_be32(txqid);
857
858 urb->transfer_flags = URB_ZERO_PACKET;
859 usb_fill_bulk_urb(urb, ar->dev, ar5523_data_tx_pipe(ar->dev),
860 skb->data, skb->len, ar5523_data_tx_cb, skb);
861
862 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
863 list_add_tail(&data->list, &ar->tx_queue_submitted);
864 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
865 mod_timer(&ar->tx_wd_timer, jiffies + AR5523_TX_WD_TIMEOUT);
866 atomic_inc(&ar->tx_nr_pending);
867
868 ar5523_dbg(ar, "TX Frame (%d pending)\n",
869 atomic_read(&ar->tx_nr_pending));
870 error = usb_submit_urb(urb, GFP_KERNEL);
871 if (error) {
872 ar5523_err(ar, "error %d when submitting tx urb\n",
873 error);
874 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
875 list_del(&data->list);
876 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
877 atomic_dec(&ar->tx_nr_pending);
878 ar5523_data_tx_pkt_put(ar);
879 usb_free_urb(urb);
880 ieee80211_free_txskb(ar->hw, skb);
881 }
882 } while (true);
883}
884
885static void ar5523_tx_work(struct work_struct *work)
886{
887 struct ar5523 *ar = container_of(work, struct ar5523, tx_work);
888
889 ar5523_dbg(ar, "%s\n", __func__);
890 mutex_lock(&ar->mutex);
891 ar5523_tx_work_locked(ar);
892 mutex_unlock(&ar->mutex);
893}
894
895static void ar5523_tx_wd_timer(unsigned long arg)
896{
897 struct ar5523 *ar = (struct ar5523 *) arg;
898
899 ar5523_dbg(ar, "TX watchdog timer triggered\n");
900 ieee80211_queue_work(ar->hw, &ar->tx_wd_work);
901}
902
903static void ar5523_tx_wd_work(struct work_struct *work)
904{
905 struct ar5523 *ar = container_of(work, struct ar5523, tx_wd_work);
906
907
908
909
910
911 mutex_lock(&ar->mutex);
912 ar5523_err(ar, "TX queue stuck (tot %d pend %d)\n",
913 atomic_read(&ar->tx_nr_total),
914 atomic_read(&ar->tx_nr_pending));
915
916 ar5523_err(ar, "Will restart dongle.\n");
917 ar5523_cmd_write(ar, WDCMSG_TARGET_RESET, NULL, 0, 0);
918 mutex_unlock(&ar->mutex);
919}
920
921static void ar5523_flush_tx(struct ar5523 *ar)
922{
923 ar5523_tx_work_locked(ar);
924
925
926 if (test_bit(AR5523_USB_DISCONNECTED, &ar->flags))
927 return;
928 if (!wait_event_timeout(ar->tx_flush_waitq,
929 !atomic_read(&ar->tx_nr_pending), AR5523_FLUSH_TIMEOUT))
930 ar5523_err(ar, "flush timeout (tot %d pend %d)\n",
931 atomic_read(&ar->tx_nr_total),
932 atomic_read(&ar->tx_nr_pending));
933}
934
935static void ar5523_free_tx_cmd(struct ar5523 *ar)
936{
937 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
938
939 usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ, cmd->buf_tx,
940 cmd->urb_tx->transfer_dma);
941 usb_free_urb(cmd->urb_tx);
942}
943
944static int ar5523_alloc_tx_cmd(struct ar5523 *ar)
945{
946 struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
947
948 cmd->ar = ar;
949 init_completion(&cmd->done);
950
951 cmd->urb_tx = usb_alloc_urb(0, GFP_KERNEL);
952 if (!cmd->urb_tx) {
953 ar5523_err(ar, "could not allocate urb\n");
954 return -ENOMEM;
955 }
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
968
969
970static 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
980
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
991
992static 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
1005 ar5523_config_multi(ar, CFG_MAC_ADDR, &ar->hw->wiphy->perm_addr,
1006 ETH_ALEN);
1007
1008
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
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
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
1053err:
1054 mutex_unlock(&ar->mutex);
1055 return error;
1056}
1057
1058static 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
1080static 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
1094static void ar5523_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1095{
1096 struct ar5523 *ar = hw->priv;
1097
1098 ar5523_dbg(ar, "flush called\n");
1099 ar5523_flush_tx(ar);
1100}
1101
1102static int ar5523_add_interface(struct ieee80211_hw *hw,
1103 struct ieee80211_vif *vif)
1104{
1105 struct ar5523 *ar = hw->priv;
1106
1107 ar5523_dbg(ar, "add interface called\n");
1108
1109 if (ar->vif) {
1110 ar5523_dbg(ar, "invalid add_interface\n");
1111 return -EOPNOTSUPP;
1112 }
1113
1114 switch (vif->type) {
1115 case NL80211_IFTYPE_STATION:
1116 ar->vif = vif;
1117 break;
1118 default:
1119 return -EOPNOTSUPP;
1120 }
1121 return 0;
1122}
1123
1124static void ar5523_remove_interface(struct ieee80211_hw *hw,
1125 struct ieee80211_vif *vif)
1126{
1127 struct ar5523 *ar = hw->priv;
1128
1129 ar5523_dbg(ar, "remove interface called\n");
1130 ar->vif = NULL;
1131}
1132
1133static int ar5523_hwconfig(struct ieee80211_hw *hw, u32 changed)
1134{
1135 struct ar5523 *ar = hw->priv;
1136
1137 ar5523_dbg(ar, "config called\n");
1138 mutex_lock(&ar->mutex);
1139 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1140 ar5523_dbg(ar, "Do channel switch\n");
1141 ar5523_flush_tx(ar);
1142 ar5523_switch_chan(ar);
1143 }
1144 mutex_unlock(&ar->mutex);
1145 return 0;
1146}
1147
1148static int ar5523_get_wlan_mode(struct ar5523 *ar,
1149 struct ieee80211_bss_conf *bss_conf)
1150{
1151 struct ieee80211_supported_band *band;
1152 int bit;
1153 struct ieee80211_sta *sta;
1154 u32 sta_rate_set;
1155
1156 band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1157 sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1158 if (!sta) {
1159 ar5523_info(ar, "STA not found!\n");
1160 return WLAN_MODE_11b;
1161 }
1162 sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
1163
1164 for (bit = 0; bit < band->n_bitrates; bit++) {
1165 if (sta_rate_set & 1) {
1166 int rate = band->bitrates[bit].bitrate;
1167 switch (rate) {
1168 case 60:
1169 case 90:
1170 case 120:
1171 case 180:
1172 case 240:
1173 case 360:
1174 case 480:
1175 case 540:
1176 return WLAN_MODE_11g;
1177 }
1178 }
1179 sta_rate_set >>= 1;
1180 }
1181 return WLAN_MODE_11b;
1182}
1183
1184static void ar5523_create_rateset(struct ar5523 *ar,
1185 struct ieee80211_bss_conf *bss_conf,
1186 struct ar5523_cmd_rateset *rs,
1187 bool basic)
1188{
1189 struct ieee80211_supported_band *band;
1190 struct ieee80211_sta *sta;
1191 int bit, i = 0;
1192 u32 sta_rate_set, basic_rate_set;
1193
1194 sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1195 basic_rate_set = bss_conf->basic_rates;
1196 if (!sta) {
1197 ar5523_info(ar, "STA not found. Cannot set rates\n");
1198 sta_rate_set = bss_conf->basic_rates;
1199 } else
1200 sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
1201
1202 ar5523_dbg(ar, "sta rate_set = %08x\n", sta_rate_set);
1203
1204 band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1205 for (bit = 0; bit < band->n_bitrates; bit++) {
1206 BUG_ON(i >= AR5523_MAX_NRATES);
1207 ar5523_dbg(ar, "Considering rate %d : %d\n",
1208 band->bitrates[bit].hw_value, sta_rate_set & 1);
1209 if (sta_rate_set & 1) {
1210 rs->set[i] = band->bitrates[bit].hw_value;
1211 if (basic_rate_set & 1 && basic)
1212 rs->set[i] |= 0x80;
1213 i++;
1214 }
1215 sta_rate_set >>= 1;
1216 basic_rate_set >>= 1;
1217 }
1218
1219 rs->length = i;
1220}
1221
1222static int ar5523_set_basic_rates(struct ar5523 *ar,
1223 struct ieee80211_bss_conf *bss)
1224{
1225 struct ar5523_cmd_rates rates;
1226
1227 memset(&rates, 0, sizeof(rates));
1228 rates.connid = cpu_to_be32(2);
1229 rates.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1230 ar5523_create_rateset(ar, bss, &rates.rateset, true);
1231
1232 return ar5523_cmd_write(ar, WDCMSG_SET_BASIC_RATE, &rates,
1233 sizeof(rates), 0);
1234}
1235
1236static int ar5523_create_connection(struct ar5523 *ar,
1237 struct ieee80211_vif *vif,
1238 struct ieee80211_bss_conf *bss)
1239{
1240 struct ar5523_cmd_create_connection create;
1241 int wlan_mode;
1242
1243 memset(&create, 0, sizeof(create));
1244 create.connid = cpu_to_be32(2);
1245 create.bssid = cpu_to_be32(0);
1246
1247 create.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1248
1249 ar5523_create_rateset(ar, bss, &create.connattr.rateset, false);
1250
1251 wlan_mode = ar5523_get_wlan_mode(ar, bss);
1252 create.connattr.wlanmode = cpu_to_be32(wlan_mode);
1253
1254 return ar5523_cmd_write(ar, WDCMSG_CREATE_CONNECTION, &create,
1255 sizeof(create), 0);
1256}
1257
1258static int ar5523_write_associd(struct ar5523 *ar,
1259 struct ieee80211_bss_conf *bss)
1260{
1261 struct ar5523_cmd_set_associd associd;
1262
1263 memset(&associd, 0, sizeof(associd));
1264 associd.defaultrateix = cpu_to_be32(0);
1265 associd.associd = cpu_to_be32(bss->aid);
1266 associd.timoffset = cpu_to_be32(0x3b);
1267 memcpy(associd.bssid, bss->bssid, ETH_ALEN);
1268 return ar5523_cmd_write(ar, WDCMSG_WRITE_ASSOCID, &associd,
1269 sizeof(associd), 0);
1270}
1271
1272static void ar5523_bss_info_changed(struct ieee80211_hw *hw,
1273 struct ieee80211_vif *vif,
1274 struct ieee80211_bss_conf *bss,
1275 u32 changed)
1276{
1277 struct ar5523 *ar = hw->priv;
1278 int error;
1279
1280 ar5523_dbg(ar, "bss_info_changed called\n");
1281 mutex_lock(&ar->mutex);
1282
1283 if (!(changed & BSS_CHANGED_ASSOC))
1284 goto out_unlock;
1285
1286 if (bss->assoc) {
1287 error = ar5523_create_connection(ar, vif, bss);
1288 if (error) {
1289 ar5523_err(ar, "could not create connection\n");
1290 goto out_unlock;
1291 }
1292
1293 error = ar5523_set_basic_rates(ar, bss);
1294 if (error) {
1295 ar5523_err(ar, "could not set negotiated rate set\n");
1296 goto out_unlock;
1297 }
1298
1299 error = ar5523_write_associd(ar, bss);
1300 if (error) {
1301 ar5523_err(ar, "could not set association\n");
1302 goto out_unlock;
1303 }
1304
1305
1306 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_ON);
1307 set_bit(AR5523_CONNECTED, &ar->flags);
1308 ieee80211_queue_delayed_work(hw, &ar->stat_work, HZ);
1309
1310 } else {
1311 cancel_delayed_work(&ar->stat_work);
1312 clear_bit(AR5523_CONNECTED, &ar->flags);
1313 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1314 }
1315
1316out_unlock:
1317 mutex_unlock(&ar->mutex);
1318
1319}
1320
1321#define AR5523_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
1322 FIF_ALLMULTI | \
1323 FIF_FCSFAIL | \
1324 FIF_OTHER_BSS)
1325
1326static 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
1341
1342
1343
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
1354static 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
1367static int ar5523_host_available(struct ar5523 *ar)
1368{
1369 struct ar5523_cmd_host_available setup;
1370
1371
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
1380static int ar5523_get_devstatus(struct ar5523 *ar)
1381{
1382 u8 macaddr[ETH_ALEN];
1383 int error;
1384
1385
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
1405static int ar5523_get_max_rxsz(struct ar5523 *ar)
1406{
1407 int error;
1408 __be32 rxsize;
1409
1410
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
1432
1433
1434static 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
1449static 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
1466static 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 = IEEE80211_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[IEEE80211_BAND_2GHZ] = &ar->band;
1480 return 0;
1481}
1482
1483
1484
1485
1486
1487
1488static 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;
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 = kmalloc(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 memset(txblock, 0, sizeof(struct ar5523_fwblock));
1516 txblock->flags = cpu_to_be32(AR5523_WRITE_BLOCK);
1517 txblock->total = cpu_to_be32(fw->size);
1518
1519 offset = 0;
1520 len = fw->size;
1521 while (len > 0) {
1522 int mlen = min(len, AR5523_MAX_FWBLOCK_SIZE);
1523
1524 txblock->remain = cpu_to_be32(len - mlen);
1525 txblock->len = cpu_to_be32(mlen);
1526
1527
1528 error = usb_bulk_msg(dev, ar5523_cmd_tx_pipe(dev),
1529 txblock, sizeof(*txblock), &foolen,
1530 AR5523_CMD_TIMEOUT);
1531 if (error) {
1532 dev_err(&dev->dev,
1533 "could not send firmware block info\n");
1534 goto out_free_fwbuf;
1535 }
1536
1537
1538 memcpy(fwbuf, fw->data + offset, mlen);
1539 error = usb_bulk_msg(dev, ar5523_data_tx_pipe(dev),
1540 fwbuf, mlen, &foolen,
1541 AR5523_DATA_TIMEOUT);
1542 if (error) {
1543 dev_err(&dev->dev,
1544 "could not send firmware block data\n");
1545 goto out_free_fwbuf;
1546 }
1547
1548
1549 error = usb_bulk_msg(dev, ar5523_cmd_rx_pipe(dev),
1550 rxblock, sizeof(*rxblock), &foolen,
1551 AR5523_CMD_TIMEOUT);
1552 if (error) {
1553 dev_err(&dev->dev,
1554 "could not read firmware answer\n");
1555 goto out_free_fwbuf;
1556 }
1557
1558 len -= mlen;
1559 offset += mlen;
1560 }
1561
1562
1563
1564
1565
1566 error = -ENXIO;
1567
1568 out_free_fwbuf:
1569 kfree(fwbuf);
1570 out_free_rxblock:
1571 kfree(rxblock);
1572 out_free_txblock:
1573 kfree(txblock);
1574 out:
1575 release_firmware(fw);
1576 return error;
1577}
1578
1579static int ar5523_probe(struct usb_interface *intf,
1580 const struct usb_device_id *id)
1581{
1582 struct usb_device *dev = interface_to_usbdev(intf);
1583 struct ieee80211_hw *hw;
1584 struct ar5523 *ar;
1585 int error = -ENOMEM;
1586
1587
1588
1589
1590
1591
1592 if (id->driver_info & AR5523_FLAG_PRE_FIRMWARE)
1593 return ar5523_load_firmware(dev);
1594
1595
1596 hw = ieee80211_alloc_hw(sizeof(*ar), &ar5523_ops);
1597 if (!hw)
1598 goto out;
1599 SET_IEEE80211_DEV(hw, &intf->dev);
1600
1601 ar = hw->priv;
1602 ar->hw = hw;
1603 ar->dev = dev;
1604 mutex_init(&ar->mutex);
1605
1606 INIT_DELAYED_WORK(&ar->stat_work, ar5523_stat_work);
1607 init_timer(&ar->tx_wd_timer);
1608 setup_timer(&ar->tx_wd_timer, ar5523_tx_wd_timer, (unsigned long) ar);
1609 INIT_WORK(&ar->tx_wd_work, ar5523_tx_wd_work);
1610 INIT_WORK(&ar->tx_work, ar5523_tx_work);
1611 INIT_LIST_HEAD(&ar->tx_queue_pending);
1612 INIT_LIST_HEAD(&ar->tx_queue_submitted);
1613 spin_lock_init(&ar->tx_data_list_lock);
1614 atomic_set(&ar->tx_nr_total, 0);
1615 atomic_set(&ar->tx_nr_pending, 0);
1616 init_waitqueue_head(&ar->tx_flush_waitq);
1617
1618 atomic_set(&ar->rx_data_free_cnt, 0);
1619 INIT_WORK(&ar->rx_refill_work, ar5523_rx_refill_work);
1620 INIT_LIST_HEAD(&ar->rx_data_free);
1621 INIT_LIST_HEAD(&ar->rx_data_used);
1622 spin_lock_init(&ar->rx_data_list_lock);
1623
1624 ar->wq = create_singlethread_workqueue("ar5523");
1625 if (!ar->wq) {
1626 ar5523_err(ar, "Could not create wq\n");
1627 goto out_free_ar;
1628 }
1629
1630 error = ar5523_alloc_rx_bufs(ar);
1631 if (error) {
1632 ar5523_err(ar, "Could not allocate rx buffers\n");
1633 goto out_free_wq;
1634 }
1635
1636 error = ar5523_alloc_rx_cmd(ar);
1637 if (error) {
1638 ar5523_err(ar, "Could not allocate rx command buffers\n");
1639 goto out_free_rx_bufs;
1640 }
1641
1642 error = ar5523_alloc_tx_cmd(ar);
1643 if (error) {
1644 ar5523_err(ar, "Could not allocate tx command buffers\n");
1645 goto out_free_rx_cmd;
1646 }
1647
1648 error = ar5523_submit_rx_cmd(ar);
1649 if (error) {
1650 ar5523_err(ar, "Failed to submit rx cmd\n");
1651 goto out_free_tx_cmd;
1652 }
1653
1654
1655
1656
1657 error = ar5523_host_available(ar);
1658 if (error) {
1659 ar5523_err(ar, "could not initialize adapter\n");
1660 goto out_cancel_rx_cmd;
1661 }
1662
1663 error = ar5523_get_max_rxsz(ar);
1664 if (error) {
1665 ar5523_err(ar, "could not get caps from adapter\n");
1666 goto out_cancel_rx_cmd;
1667 }
1668
1669 error = ar5523_get_devcap(ar);
1670 if (error) {
1671 ar5523_err(ar, "could not get caps from adapter\n");
1672 goto out_cancel_rx_cmd;
1673 }
1674
1675 error = ar5523_get_devstatus(ar);
1676 if (error != 0) {
1677 ar5523_err(ar, "could not get device status\n");
1678 goto out_cancel_rx_cmd;
1679 }
1680
1681 ar5523_info(ar, "MAC/BBP AR5523, RF AR%c112\n",
1682 (id->driver_info & AR5523_FLAG_ABG) ? '5' : '2');
1683
1684 ar->vif = NULL;
1685 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
1686 IEEE80211_HW_SIGNAL_DBM |
1687 IEEE80211_HW_HAS_RATE_CONTROL;
1688 hw->extra_tx_headroom = sizeof(struct ar5523_tx_desc) +
1689 sizeof(struct ar5523_chunk);
1690 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1691 hw->queues = 1;
1692
1693 error = ar5523_init_modes(ar);
1694 if (error)
1695 goto out_cancel_rx_cmd;
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
1708out_cancel_rx_cmd:
1709 ar5523_cancel_rx_cmd(ar);
1710out_free_tx_cmd:
1711 ar5523_free_tx_cmd(ar);
1712out_free_rx_cmd:
1713 ar5523_free_rx_cmd(ar);
1714out_free_rx_bufs:
1715 ar5523_free_rx_bufs(ar);
1716out_free_wq:
1717 destroy_workqueue(ar->wq);
1718out_free_ar:
1719 ieee80211_free_hw(hw);
1720out:
1721 return error;
1722}
1723
1724static 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
1755static struct usb_device_id ar5523_id_table[] = {
1756 AR5523_DEVICE_UG(0x168c, 0x0001),
1757 AR5523_DEVICE_UG(0x0cf3, 0x0001),
1758 AR5523_DEVICE_UG(0x0cf3, 0x0003),
1759 AR5523_DEVICE_UX(0x0cf3, 0x0005),
1760 AR5523_DEVICE_UG(0x0d8e, 0x7801),
1761 AR5523_DEVICE_UX(0x0d8e, 0x7811),
1762 AR5523_DEVICE_UX(0x2001, 0x3a00),
1763 AR5523_DEVICE_UG(0x2001, 0x3a02),
1764 AR5523_DEVICE_UX(0x2001, 0x3a04),
1765 AR5523_DEVICE_UG(0x1690, 0x0712),
1766 AR5523_DEVICE_UG(0x1690, 0x0710),
1767 AR5523_DEVICE_UG(0x129b, 0x160c),
1768
1769 AR5523_DEVICE_UG(0x16ab, 0x7801),
1770 AR5523_DEVICE_UX(0x16ab, 0x7811),
1771 AR5523_DEVICE_UG(0x0d8e, 0x7802),
1772 AR5523_DEVICE_UX(0x0846, 0x4300),
1773 AR5523_DEVICE_UG(0x0846, 0x4250),
1774 AR5523_DEVICE_UG(0x0846, 0x5f00),
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
