Version:  2.0.40 2.2.26 2.4.37 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

Linux/drivers/net/wireless/ath/ar5523/ar5523.c

  1 /*
  2  * Copyright (c) 2006 Damien Bergamini <damien.bergamini@free.fr>
  3  * Copyright (c) 2006 Sam Leffler, Errno Consulting
  4  * Copyright (c) 2007 Christoph Hellwig <hch@lst.de>
  5  * Copyright (c) 2008-2009 Weongyo Jeong <weongyo@freebsd.org>
  6  * Copyright (c) 2012 Pontus Fuchs <pontus.fuchs@gmail.com>
  7  *
  8  * Permission to use, copy, modify, and/or distribute this software for any
  9  * purpose with or without fee is hereby granted, provided that the above
 10  * copyright notice and this permission notice appear in all copies.
 11  *
 12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 19  */
 20 
 21 /*
 22  * This driver is based on the uath driver written by Damien Bergamini for
 23  * OpenBSD, who did black-box analysis of the Windows binary driver to find
 24  * out how the hardware works.  It contains a lot magic numbers because of
 25  * that and only has minimal functionality.
 26  */
 27 #include <linux/compiler.h>
 28 #include <linux/kernel.h>
 29 #include <linux/module.h>
 30 #include <linux/list.h>
 31 #include <linux/completion.h>
 32 #include <linux/firmware.h>
 33 #include <linux/skbuff.h>
 34 #include <linux/usb.h>
 35 #include <net/mac80211.h>
 36 
 37 #include "ar5523.h"
 38 #include "ar5523_hw.h"
 39 
 40 /*
 41  * Various supported device vendors/products.
 42  * UB51: AR5005UG 802.11b/g, UB52: AR5005UX 802.11a/b/g
 43  */
 44 
 45 static int ar5523_submit_rx_cmd(struct ar5523 *ar);
 46 static void ar5523_data_tx_pkt_put(struct ar5523 *ar);
 47 
 48 static void ar5523_read_reply(struct ar5523 *ar, struct ar5523_cmd_hdr *hdr,
 49                               struct ar5523_tx_cmd *cmd)
 50 {
 51         int dlen, olen;
 52         __be32 *rp;
 53 
 54         dlen = be32_to_cpu(hdr->len) - sizeof(*hdr);
 55 
 56         if (dlen < 0) {
 57                 WARN_ON(1);
 58                 goto out;
 59         }
 60 
 61         ar5523_dbg(ar, "Code = %d len = %d\n", be32_to_cpu(hdr->code) & 0xff,
 62                    dlen);
 63 
 64         rp = (__be32 *)(hdr + 1);
 65         if (dlen >= sizeof(u32)) {
 66                 olen = be32_to_cpu(rp[0]);
 67                 dlen -= sizeof(u32);
 68                 if (olen == 0) {
 69                         /* convention is 0 =>'s one word */
 70                         olen = sizeof(u32);
 71                 }
 72         } else
 73                 olen = 0;
 74 
 75         if (cmd->odata) {
 76                 if (cmd->olen < olen) {
 77                         ar5523_err(ar, "olen to small %d < %d\n",
 78                                    cmd->olen, olen);
 79                         cmd->olen = 0;
 80                         cmd->res = -EOVERFLOW;
 81                 } else {
 82                         cmd->olen = olen;
 83                         memcpy(cmd->odata, &rp[1], olen);
 84                         cmd->res = 0;
 85                 }
 86         }
 87 
 88 out:
 89         complete(&cmd->done);
 90 }
 91 
 92 static void ar5523_cmd_rx_cb(struct urb *urb)
 93 {
 94         struct ar5523 *ar = urb->context;
 95         struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
 96         struct ar5523_cmd_hdr *hdr = ar->rx_cmd_buf;
 97         int dlen;
 98         u32 code, hdrlen;
 99 
100         if (urb->status) {
101                 if (urb->status != -ESHUTDOWN)
102                         ar5523_err(ar, "RX USB error %d.\n", urb->status);
103                 goto skip;
104         }
105 
106         if (urb->actual_length < sizeof(struct ar5523_cmd_hdr)) {
107                 ar5523_err(ar, "RX USB to short.\n");
108                 goto skip;
109         }
110 
111         ar5523_dbg(ar, "%s code %02x priv %d\n", __func__,
112                    be32_to_cpu(hdr->code) & 0xff, hdr->priv);
113 
114         code = be32_to_cpu(hdr->code);
115         hdrlen = be32_to_cpu(hdr->len);
116 
117         switch (code & 0xff) {
118         default:
119                 /* reply to a read command */
120                 if (hdr->priv != AR5523_CMD_ID) {
121                         ar5523_err(ar, "Unexpected command id: %02x\n",
122                                    code & 0xff);
123                         goto skip;
124                 }
125                 ar5523_read_reply(ar, hdr, cmd);
126                 break;
127 
128         case WDCMSG_DEVICE_AVAIL:
129                 ar5523_dbg(ar, "WDCMSG_DEVICE_AVAIL\n");
130                 cmd->res = 0;
131                 cmd->olen = 0;
132                 complete(&cmd->done);
133                 break;
134 
135         case WDCMSG_SEND_COMPLETE:
136                 ar5523_dbg(ar, "WDCMSG_SEND_COMPLETE: %d pending\n",
137                         atomic_read(&ar->tx_nr_pending));
138                 if (!test_bit(AR5523_HW_UP, &ar->flags))
139                         ar5523_dbg(ar, "Unexpected WDCMSG_SEND_COMPLETE\n");
140                 else {
141                         mod_timer(&ar->tx_wd_timer,
142                                   jiffies + AR5523_TX_WD_TIMEOUT);
143                         ar5523_data_tx_pkt_put(ar);
144 
145                 }
146                 break;
147 
148         case WDCMSG_TARGET_START:
149                 /* This command returns a bogus id so it needs special
150                    handling */
151                 dlen = hdrlen - sizeof(*hdr);
152                 if (dlen != (int)sizeof(u32)) {
153                         ar5523_err(ar, "Invalid reply to WDCMSG_TARGET_START");
154                         return;
155                 }
156                 memcpy(cmd->odata, hdr + 1, sizeof(u32));
157                 cmd->olen = sizeof(u32);
158                 cmd->res = 0;
159                 complete(&cmd->done);
160                 break;
161 
162         case WDCMSG_STATS_UPDATE:
163                 ar5523_dbg(ar, "WDCMSG_STATS_UPDATE\n");
164                 break;
165         }
166 
167 skip:
168         ar5523_submit_rx_cmd(ar);
169 }
170 
171 static 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 
187 static void ar5523_cancel_rx_cmd(struct ar5523 *ar)
188 {
189         usb_kill_urb(ar->rx_cmd_urb);
190 }
191 
192 static 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 
199 static int ar5523_submit_rx_cmd(struct ar5523 *ar)
200 {
201         int error;
202 
203         usb_fill_bulk_urb(ar->rx_cmd_urb, ar->dev,
204                           ar5523_cmd_rx_pipe(ar->dev), ar->rx_cmd_buf,
205                           AR5523_MAX_RXCMDSZ, ar5523_cmd_rx_cb, ar);
206         ar->rx_cmd_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
207 
208         error = usb_submit_urb(ar->rx_cmd_urb, GFP_ATOMIC);
209         if (error) {
210                 if (error != -ENODEV)
211                         ar5523_err(ar, "error %d when submitting rx urb\n",
212                                    error);
213                 return error;
214         }
215         return 0;
216 }
217 
218 /*
219  * Command submitted cb
220  */
221 static 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 
240 static int ar5523_cmd(struct ar5523 *ar, u32 code, const void *idata,
241                       int ilen, void *odata, int olen, int flags)
242 {
243         struct ar5523_cmd_hdr *hdr;
244         struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
245         int xferlen, error;
246 
247         /* always bulk-out a multiple of 4 bytes */
248         xferlen = (sizeof(struct ar5523_cmd_hdr) + ilen + 3) & ~3;
249 
250         hdr = (struct ar5523_cmd_hdr *)cmd->buf_tx;
251         memset(hdr, 0, sizeof(struct ar5523_cmd_hdr));
252         hdr->len  = cpu_to_be32(xferlen);
253         hdr->code = cpu_to_be32(code);
254         hdr->priv = AR5523_CMD_ID;
255 
256         if (flags & AR5523_CMD_FLAG_MAGIC)
257                 hdr->magic = cpu_to_be32(1 << 24);
258         memcpy(hdr + 1, idata, ilen);
259 
260         cmd->odata = odata;
261         cmd->olen = olen;
262         cmd->flags = flags;
263 
264         ar5523_dbg(ar, "do cmd %02x\n", code);
265 
266         usb_fill_bulk_urb(cmd->urb_tx, ar->dev, ar5523_cmd_tx_pipe(ar->dev),
267                           cmd->buf_tx, xferlen, ar5523_cmd_tx_cb, cmd);
268         cmd->urb_tx->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
269 
270         error = usb_submit_urb(cmd->urb_tx, GFP_KERNEL);
271         if (error) {
272                 ar5523_err(ar, "could not send command 0x%x, error=%d\n",
273                            code, error);
274                 return error;
275         }
276 
277         if (!wait_for_completion_timeout(&cmd->done, 2 * HZ)) {
278                 cmd->odata = NULL;
279                 ar5523_err(ar, "timeout waiting for command %02x reply\n",
280                            code);
281                 cmd->res = -ETIMEDOUT;
282         }
283         return cmd->res;
284 }
285 
286 static int ar5523_cmd_write(struct ar5523 *ar, u32 code, const void *data,
287                             int len, int flags)
288 {
289         flags &= ~AR5523_CMD_FLAG_READ;
290         return ar5523_cmd(ar, code, data, len, NULL, 0, flags);
291 }
292 
293 static int ar5523_cmd_read(struct ar5523 *ar, u32 code, const void *idata,
294                            int ilen, void *odata, int olen, int flags)
295 {
296         flags |= AR5523_CMD_FLAG_READ;
297         return ar5523_cmd(ar, code, idata, ilen, odata, olen, flags);
298 }
299 
300 static int ar5523_config(struct ar5523 *ar, u32 reg, u32 val)
301 {
302         struct ar5523_write_mac write;
303         int error;
304 
305         write.reg = cpu_to_be32(reg);
306         write.len = cpu_to_be32(0);     /* 0 = single write */
307         *(__be32 *)write.data = cpu_to_be32(val);
308 
309         error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
310                                  3 * sizeof(u32), 0);
311         if (error != 0)
312                 ar5523_err(ar, "could not write register 0x%02x\n", reg);
313         return error;
314 }
315 
316 static int ar5523_config_multi(struct ar5523 *ar, u32 reg, const void *data,
317                                int len)
318 {
319         struct ar5523_write_mac write;
320         int error;
321 
322         write.reg = cpu_to_be32(reg);
323         write.len = cpu_to_be32(len);
324         memcpy(write.data, data, len);
325 
326         /* properly handle the case where len is zero (reset) */
327         error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
328             (len == 0) ? sizeof(u32) : 2 * sizeof(u32) + len, 0);
329         if (error != 0)
330                 ar5523_err(ar, "could not write %d bytes to register 0x%02x\n",
331                            len, reg);
332         return error;
333 }
334 
335 static int ar5523_get_status(struct ar5523 *ar, u32 which, void *odata,
336                              int olen)
337 {
338         int error;
339         __be32 which_be;
340 
341         which_be = cpu_to_be32(which);
342         error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_STATUS,
343             &which_be, sizeof(which_be), odata, olen, AR5523_CMD_FLAG_MAGIC);
344         if (error != 0)
345                 ar5523_err(ar, "could not read EEPROM offset 0x%02x\n", which);
346         return error;
347 }
348 
349 static int ar5523_get_capability(struct ar5523 *ar, u32 cap, u32 *val)
350 {
351         int error;
352         __be32 cap_be, val_be;
353 
354         cap_be = cpu_to_be32(cap);
355         error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_CAPABILITY, &cap_be,
356                                 sizeof(cap_be), &val_be, sizeof(__be32),
357                                 AR5523_CMD_FLAG_MAGIC);
358         if (error != 0) {
359                 ar5523_err(ar, "could not read capability %u\n", cap);
360                 return error;
361         }
362         *val = be32_to_cpu(val_be);
363         return error;
364 }
365 
366 static int ar5523_get_devcap(struct ar5523 *ar)
367 {
368 #define GETCAP(x) do {                          \
369         error = ar5523_get_capability(ar, x, &cap);             \
370         if (error != 0)                                 \
371                 return error;                           \
372         ar5523_info(ar, "Cap: "                 \
373             "%s=0x%08x\n", #x, cap);    \
374 } while (0)
375         int error;
376         u32 cap;
377 
378         /* collect device capabilities */
379         GETCAP(CAP_TARGET_VERSION);
380         GETCAP(CAP_TARGET_REVISION);
381         GETCAP(CAP_MAC_VERSION);
382         GETCAP(CAP_MAC_REVISION);
383         GETCAP(CAP_PHY_REVISION);
384         GETCAP(CAP_ANALOG_5GHz_REVISION);
385         GETCAP(CAP_ANALOG_2GHz_REVISION);
386 
387         GETCAP(CAP_REG_DOMAIN);
388         GETCAP(CAP_REG_CAP_BITS);
389         GETCAP(CAP_WIRELESS_MODES);
390         GETCAP(CAP_CHAN_SPREAD_SUPPORT);
391         GETCAP(CAP_COMPRESS_SUPPORT);
392         GETCAP(CAP_BURST_SUPPORT);
393         GETCAP(CAP_FAST_FRAMES_SUPPORT);
394         GETCAP(CAP_CHAP_TUNING_SUPPORT);
395         GETCAP(CAP_TURBOG_SUPPORT);
396         GETCAP(CAP_TURBO_PRIME_SUPPORT);
397         GETCAP(CAP_DEVICE_TYPE);
398         GETCAP(CAP_WME_SUPPORT);
399         GETCAP(CAP_TOTAL_QUEUES);
400         GETCAP(CAP_CONNECTION_ID_MAX);
401 
402         GETCAP(CAP_LOW_5GHZ_CHAN);
403         GETCAP(CAP_HIGH_5GHZ_CHAN);
404         GETCAP(CAP_LOW_2GHZ_CHAN);
405         GETCAP(CAP_HIGH_2GHZ_CHAN);
406         GETCAP(CAP_TWICE_ANTENNAGAIN_5G);
407         GETCAP(CAP_TWICE_ANTENNAGAIN_2G);
408 
409         GETCAP(CAP_CIPHER_AES_CCM);
410         GETCAP(CAP_CIPHER_TKIP);
411         GETCAP(CAP_MIC_TKIP);
412         return 0;
413 }
414 
415 static int ar5523_set_ledsteady(struct ar5523 *ar, int lednum, int ledmode)
416 {
417         struct ar5523_cmd_ledsteady led;
418 
419         led.lednum = cpu_to_be32(lednum);
420         led.ledmode = cpu_to_be32(ledmode);
421 
422         ar5523_dbg(ar, "set %s led %s (steady)\n",
423                    (lednum == UATH_LED_LINK) ? "link" : "activity",
424                    ledmode ? "on" : "off");
425         return ar5523_cmd_write(ar, WDCMSG_SET_LED_STEADY, &led, sizeof(led),
426                                  0);
427 }
428 
429 static int ar5523_set_rxfilter(struct ar5523 *ar, u32 bits, u32 op)
430 {
431         struct ar5523_cmd_rx_filter rxfilter;
432 
433         rxfilter.bits = cpu_to_be32(bits);
434         rxfilter.op = cpu_to_be32(op);
435 
436         ar5523_dbg(ar, "setting Rx filter=0x%x flags=0x%x\n", bits, op);
437         return ar5523_cmd_write(ar, WDCMSG_RX_FILTER, &rxfilter,
438                                  sizeof(rxfilter), 0);
439 }
440 
441 static int ar5523_reset_tx_queues(struct ar5523 *ar)
442 {
443         __be32 qid = cpu_to_be32(0);
444 
445         ar5523_dbg(ar, "resetting Tx queue\n");
446         return ar5523_cmd_write(ar, WDCMSG_RELEASE_TX_QUEUE,
447                                  &qid, sizeof(qid), 0);
448 }
449 
450 static int ar5523_set_chan(struct ar5523 *ar)
451 {
452         struct ieee80211_conf *conf = &ar->hw->conf;
453 
454         struct ar5523_cmd_reset reset;
455 
456         memset(&reset, 0, sizeof(reset));
457         reset.flags |= cpu_to_be32(UATH_CHAN_2GHZ);
458         reset.flags |= cpu_to_be32(UATH_CHAN_OFDM);
459         reset.freq = cpu_to_be32(conf->chandef.chan->center_freq);
460         reset.maxrdpower = cpu_to_be32(50);     /* XXX */
461         reset.channelchange = cpu_to_be32(1);
462         reset.keeprccontent = cpu_to_be32(0);
463 
464         ar5523_dbg(ar, "set chan flags 0x%x freq %d\n",
465                    be32_to_cpu(reset.flags),
466                    conf->chandef.chan->center_freq);
467         return ar5523_cmd_write(ar, WDCMSG_RESET, &reset, sizeof(reset), 0);
468 }
469 
470 static int ar5523_queue_init(struct ar5523 *ar)
471 {
472         struct ar5523_cmd_txq_setup qinfo;
473 
474         ar5523_dbg(ar, "setting up Tx queue\n");
475         qinfo.qid            = cpu_to_be32(0);
476         qinfo.len            = cpu_to_be32(sizeof(qinfo.attr));
477         qinfo.attr.priority  = cpu_to_be32(0);  /* XXX */
478         qinfo.attr.aifs      = cpu_to_be32(3);
479         qinfo.attr.logcwmin  = cpu_to_be32(4);
480         qinfo.attr.logcwmax  = cpu_to_be32(10);
481         qinfo.attr.bursttime = cpu_to_be32(0);
482         qinfo.attr.mode      = cpu_to_be32(0);
483         qinfo.attr.qflags    = cpu_to_be32(1);  /* XXX? */
484         return ar5523_cmd_write(ar, WDCMSG_SETUP_TX_QUEUE, &qinfo,
485                                  sizeof(qinfo), 0);
486 }
487 
488 static int ar5523_switch_chan(struct ar5523 *ar)
489 {
490         int error;
491 
492         error = ar5523_set_chan(ar);
493         if (error) {
494                 ar5523_err(ar, "could not set chan, error %d\n", error);
495                 goto out_err;
496         }
497 
498         /* reset Tx rings */
499         error = ar5523_reset_tx_queues(ar);
500         if (error) {
501                 ar5523_err(ar, "could not reset Tx queues, error %d\n",
502                            error);
503                 goto out_err;
504         }
505         /* set Tx rings WME properties */
506         error = ar5523_queue_init(ar);
507         if (error)
508                 ar5523_err(ar, "could not init wme, error %d\n", error);
509 
510 out_err:
511         return error;
512 }
513 
514 static void ar5523_rx_data_put(struct ar5523 *ar,
515                                 struct ar5523_rx_data *data)
516 {
517         unsigned long flags;
518         spin_lock_irqsave(&ar->rx_data_list_lock, flags);
519         list_move(&data->list, &ar->rx_data_free);
520         spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
521 }
522 
523 static void ar5523_data_rx_cb(struct urb *urb)
524 {
525         struct ar5523_rx_data *data = urb->context;
526         struct ar5523 *ar = data->ar;
527         struct ar5523_rx_desc *desc;
528         struct ar5523_chunk *chunk;
529         struct ieee80211_hw *hw = ar->hw;
530         struct ieee80211_rx_status *rx_status;
531         u32 rxlen;
532         int usblen = urb->actual_length;
533         int hdrlen, pad;
534 
535         ar5523_dbg(ar, "%s\n", __func__);
536         /* sync/async unlink faults aren't errors */
537         if (urb->status) {
538                 if (urb->status != -ESHUTDOWN)
539                         ar5523_err(ar, "%s: USB err: %d\n", __func__,
540                                    urb->status);
541                 goto skip;
542         }
543 
544         if (usblen < AR5523_MIN_RXBUFSZ) {
545                 ar5523_err(ar, "RX: wrong xfer size (usblen=%d)\n", usblen);
546                 goto skip;
547         }
548 
549         chunk = (struct ar5523_chunk *) data->skb->data;
550 
551         if (((chunk->flags & UATH_CFLAGS_FINAL) == 0) ||
552                 chunk->seqnum != 0) {
553                 ar5523_dbg(ar, "RX: No final flag. s: %d f: %02x l: %d\n",
554                            chunk->seqnum, chunk->flags,
555                            be16_to_cpu(chunk->length));
556                 goto skip;
557         }
558 
559         /* Rx descriptor is located at the end, 32-bit aligned */
560         desc = (struct ar5523_rx_desc *)
561                 (data->skb->data + usblen - sizeof(struct ar5523_rx_desc));
562 
563         rxlen = be32_to_cpu(desc->len);
564         if (rxlen > ar->rxbufsz) {
565                 ar5523_dbg(ar, "RX: Bad descriptor (len=%d)\n",
566                            be32_to_cpu(desc->len));
567                 goto skip;
568         }
569 
570         if (!rxlen) {
571                 ar5523_dbg(ar, "RX: rxlen is 0\n");
572                 goto skip;
573         }
574 
575         if (be32_to_cpu(desc->status) != 0) {
576                 ar5523_dbg(ar, "Bad RX status (0x%x len = %d). Skip\n",
577                            be32_to_cpu(desc->status), be32_to_cpu(desc->len));
578                 goto skip;
579         }
580 
581         skb_reserve(data->skb, sizeof(*chunk));
582         skb_put(data->skb, rxlen - sizeof(struct ar5523_rx_desc));
583 
584         hdrlen = ieee80211_get_hdrlen_from_skb(data->skb);
585         if (!IS_ALIGNED(hdrlen, 4)) {
586                 ar5523_dbg(ar, "eek, alignment workaround activated\n");
587                 pad = ALIGN(hdrlen, 4) - hdrlen;
588                 memmove(data->skb->data + pad, data->skb->data, hdrlen);
589                 skb_pull(data->skb, pad);
590                 skb_put(data->skb, pad);
591         }
592 
593         rx_status = IEEE80211_SKB_RXCB(data->skb);
594         memset(rx_status, 0, sizeof(*rx_status));
595         rx_status->freq = be32_to_cpu(desc->channel);
596         rx_status->band = hw->conf.chandef.chan->band;
597         rx_status->signal = -95 + be32_to_cpu(desc->rssi);
598 
599         ieee80211_rx_irqsafe(hw, data->skb);
600         data->skb = NULL;
601 
602 skip:
603         if (data->skb) {
604                 dev_kfree_skb_irq(data->skb);
605                 data->skb = NULL;
606         }
607 
608         ar5523_rx_data_put(ar, data);
609         if (atomic_inc_return(&ar->rx_data_free_cnt) >=
610             AR5523_RX_DATA_REFILL_COUNT &&
611             test_bit(AR5523_HW_UP, &ar->flags))
612                 queue_work(ar->wq, &ar->rx_refill_work);
613 }
614 
615 static void ar5523_rx_refill_work(struct work_struct *work)
616 {
617         struct ar5523 *ar = container_of(work, struct ar5523, rx_refill_work);
618         struct ar5523_rx_data *data;
619         unsigned long flags;
620         int error;
621 
622         ar5523_dbg(ar, "%s\n", __func__);
623         do {
624                 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
625 
626                 if (!list_empty(&ar->rx_data_free))
627                         data = (struct ar5523_rx_data *) ar->rx_data_free.next;
628                 else
629                         data = NULL;
630                 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
631 
632                 if (!data)
633                         goto done;
634 
635                 data->skb = alloc_skb(ar->rxbufsz, GFP_KERNEL);
636                 if (!data->skb) {
637                         ar5523_err(ar, "could not allocate rx skbuff\n");
638                         return;
639                 }
640 
641                 usb_fill_bulk_urb(data->urb, ar->dev,
642                                   ar5523_data_rx_pipe(ar->dev), data->skb->data,
643                                   ar->rxbufsz, ar5523_data_rx_cb, data);
644 
645                 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
646                 list_move(&data->list, &ar->rx_data_used);
647                 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
648                 atomic_dec(&ar->rx_data_free_cnt);
649 
650                 error = usb_submit_urb(data->urb, GFP_KERNEL);
651                 if (error) {
652                         kfree_skb(data->skb);
653                         if (error != -ENODEV)
654                                 ar5523_err(ar, "Err sending rx data urb %d\n",
655                                            error);
656                         ar5523_rx_data_put(ar, data);
657                         atomic_inc(&ar->rx_data_free_cnt);
658                         return;
659                 }
660 
661         } while (true);
662 done:
663         return;
664 }
665 
666 static void ar5523_cancel_rx_bufs(struct ar5523 *ar)
667 {
668         struct ar5523_rx_data *data;
669         unsigned long flags;
670 
671         do {
672                 spin_lock_irqsave(&ar->rx_data_list_lock, flags);
673                 if (!list_empty(&ar->rx_data_used))
674                         data = (struct ar5523_rx_data *) ar->rx_data_used.next;
675                 else
676                         data = NULL;
677                 spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
678 
679                 if (!data)
680                         break;
681 
682                 usb_kill_urb(data->urb);
683                 list_move(&data->list, &ar->rx_data_free);
684                 atomic_inc(&ar->rx_data_free_cnt);
685         } while (data);
686 }
687 
688 static void ar5523_free_rx_bufs(struct ar5523 *ar)
689 {
690         struct ar5523_rx_data *data;
691 
692         ar5523_cancel_rx_bufs(ar);
693         while (!list_empty(&ar->rx_data_free)) {
694                 data = (struct ar5523_rx_data *) ar->rx_data_free.next;
695                 list_del(&data->list);
696                 usb_free_urb(data->urb);
697         }
698 }
699 
700 static int ar5523_alloc_rx_bufs(struct ar5523 *ar)
701 {
702         int i;
703 
704         for (i = 0; i < AR5523_RX_DATA_COUNT; i++) {
705                 struct ar5523_rx_data *data = &ar->rx_data[i];
706 
707                 data->ar = ar;
708                 data->urb = usb_alloc_urb(0, GFP_KERNEL);
709                 if (!data->urb)
710                         goto err;
711                 list_add_tail(&data->list, &ar->rx_data_free);
712                 atomic_inc(&ar->rx_data_free_cnt);
713         }
714         return 0;
715 
716 err:
717         ar5523_free_rx_bufs(ar);
718         return -ENOMEM;
719 }
720 
721 static void ar5523_data_tx_pkt_put(struct ar5523 *ar)
722 {
723         atomic_dec(&ar->tx_nr_total);
724         if (!atomic_dec_return(&ar->tx_nr_pending)) {
725                 del_timer(&ar->tx_wd_timer);
726                 wake_up(&ar->tx_flush_waitq);
727         }
728 
729         if (atomic_read(&ar->tx_nr_total) < AR5523_TX_DATA_RESTART_COUNT) {
730                 ar5523_dbg(ar, "restart tx queue\n");
731                 ieee80211_wake_queues(ar->hw);
732         }
733 }
734 
735 static void ar5523_data_tx_cb(struct urb *urb)
736 {
737         struct sk_buff *skb = urb->context;
738         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
739         struct ar5523_tx_data *data = (struct ar5523_tx_data *)
740                                        txi->driver_data;
741         struct ar5523 *ar = data->ar;
742         unsigned long flags;
743 
744         ar5523_dbg(ar, "data tx urb completed: %d\n", urb->status);
745 
746         spin_lock_irqsave(&ar->tx_data_list_lock, flags);
747         list_del(&data->list);
748         spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
749 
750         if (urb->status) {
751                 ar5523_dbg(ar, "%s: urb status: %d\n", __func__, urb->status);
752                 ar5523_data_tx_pkt_put(ar);
753                 ieee80211_free_txskb(ar->hw, skb);
754         } else {
755                 skb_pull(skb, sizeof(struct ar5523_tx_desc) + sizeof(__be32));
756                 ieee80211_tx_status_irqsafe(ar->hw, skb);
757         }
758         usb_free_urb(urb);
759 }
760 
761 static void ar5523_tx(struct ieee80211_hw *hw,
762                        struct ieee80211_tx_control *control,
763                        struct sk_buff *skb)
764 {
765         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
766         struct ar5523_tx_data *data = (struct ar5523_tx_data *)
767                                         txi->driver_data;
768         struct ar5523 *ar = hw->priv;
769         unsigned long flags;
770 
771         ar5523_dbg(ar, "tx called\n");
772         if (atomic_inc_return(&ar->tx_nr_total) >= AR5523_TX_DATA_COUNT) {
773                 ar5523_dbg(ar, "tx queue full\n");
774                 ar5523_dbg(ar, "stop queues (tot %d pend %d)\n",
775                            atomic_read(&ar->tx_nr_total),
776                            atomic_read(&ar->tx_nr_pending));
777                 ieee80211_stop_queues(hw);
778         }
779 
780         spin_lock_irqsave(&ar->tx_data_list_lock, flags);
781         list_add_tail(&data->list, &ar->tx_queue_pending);
782         spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
783 
784         ieee80211_queue_work(ar->hw, &ar->tx_work);
785 }
786 
787 static void ar5523_tx_work_locked(struct ar5523 *ar)
788 {
789         struct ar5523_tx_data *data;
790         struct ar5523_tx_desc *desc;
791         struct ar5523_chunk *chunk;
792         struct ieee80211_tx_info *txi;
793         struct urb *urb;
794         struct sk_buff *skb;
795         int error = 0, paylen;
796         u32 txqid;
797         unsigned long flags;
798 
799         BUILD_BUG_ON(sizeof(struct ar5523_tx_data) >
800                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
801 
802         ar5523_dbg(ar, "%s\n", __func__);
803         do {
804                 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
805                 if (!list_empty(&ar->tx_queue_pending)) {
806                         data = (struct ar5523_tx_data *)
807                                 ar->tx_queue_pending.next;
808                         list_del(&data->list);
809                 } else
810                         data = NULL;
811                 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
812 
813                 if (!data)
814                         break;
815 
816                 txi = container_of((void *)data, struct ieee80211_tx_info,
817                                    driver_data);
818                 txqid = 0;
819 
820                 skb = container_of((void *)txi, struct sk_buff, cb);
821                 paylen = skb->len;
822 
823                 urb = usb_alloc_urb(0, GFP_KERNEL);
824                 if (!urb) {
825                         ieee80211_free_txskb(ar->hw, skb);
826                         continue;
827                 }
828 
829                 data->ar = ar;
830                 data->urb = urb;
831 
832                 desc = (struct ar5523_tx_desc *)skb_push(skb, sizeof(*desc));
833                 chunk = (struct ar5523_chunk *)skb_push(skb, sizeof(*chunk));
834 
835                 chunk->seqnum = 0;
836                 chunk->flags = UATH_CFLAGS_FINAL;
837                 chunk->length = cpu_to_be16(skb->len);
838 
839                 desc->msglen = cpu_to_be32(skb->len);
840                 desc->msgid  = AR5523_DATA_ID;
841                 desc->buflen = cpu_to_be32(paylen);
842                 desc->type   = cpu_to_be32(WDCMSG_SEND);
843                 desc->flags  = cpu_to_be32(UATH_TX_NOTIFY);
844 
845                 if (test_bit(AR5523_CONNECTED, &ar->flags))
846                         desc->connid = cpu_to_be32(AR5523_ID_BSS);
847                 else
848                         desc->connid = cpu_to_be32(AR5523_ID_BROADCAST);
849 
850                 if (txi->flags & IEEE80211_TX_CTL_USE_MINRATE)
851                         txqid |= UATH_TXQID_MINRATE;
852 
853                 desc->txqid = cpu_to_be32(txqid);
854 
855                 urb->transfer_flags = URB_ZERO_PACKET;
856                 usb_fill_bulk_urb(urb, ar->dev, ar5523_data_tx_pipe(ar->dev),
857                                   skb->data, skb->len, ar5523_data_tx_cb, skb);
858 
859                 spin_lock_irqsave(&ar->tx_data_list_lock, flags);
860                 list_add_tail(&data->list, &ar->tx_queue_submitted);
861                 spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
862                 mod_timer(&ar->tx_wd_timer, jiffies + AR5523_TX_WD_TIMEOUT);
863                 atomic_inc(&ar->tx_nr_pending);
864 
865                 ar5523_dbg(ar, "TX Frame (%d pending)\n",
866                            atomic_read(&ar->tx_nr_pending));
867                 error = usb_submit_urb(urb, GFP_KERNEL);
868                 if (error) {
869                         ar5523_err(ar, "error %d when submitting tx urb\n",
870                                    error);
871                         spin_lock_irqsave(&ar->tx_data_list_lock, flags);
872                         list_del(&data->list);
873                         spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
874                         atomic_dec(&ar->tx_nr_pending);
875                         ar5523_data_tx_pkt_put(ar);
876                         usb_free_urb(urb);
877                         ieee80211_free_txskb(ar->hw, skb);
878                 }
879         } while (true);
880 }
881 
882 static void ar5523_tx_work(struct work_struct *work)
883 {
884         struct ar5523 *ar = container_of(work, struct ar5523, tx_work);
885 
886         ar5523_dbg(ar, "%s\n", __func__);
887         mutex_lock(&ar->mutex);
888         ar5523_tx_work_locked(ar);
889         mutex_unlock(&ar->mutex);
890 }
891 
892 static void ar5523_tx_wd_timer(unsigned long arg)
893 {
894         struct ar5523 *ar = (struct ar5523 *) arg;
895 
896         ar5523_dbg(ar, "TX watchdog timer triggered\n");
897         ieee80211_queue_work(ar->hw, &ar->tx_wd_work);
898 }
899 
900 static void ar5523_tx_wd_work(struct work_struct *work)
901 {
902         struct ar5523 *ar = container_of(work, struct ar5523, tx_wd_work);
903 
904         /* Occasionally the TX queues stop responding. The only way to
905          * recover seems to be to reset the dongle.
906          */
907 
908         mutex_lock(&ar->mutex);
909         ar5523_err(ar, "TX queue stuck (tot %d pend %d)\n",
910                    atomic_read(&ar->tx_nr_total),
911                    atomic_read(&ar->tx_nr_pending));
912 
913         ar5523_err(ar, "Will restart dongle.\n");
914         ar5523_cmd_write(ar, WDCMSG_TARGET_RESET, NULL, 0, 0);
915         mutex_unlock(&ar->mutex);
916 }
917 
918 static void ar5523_flush_tx(struct ar5523 *ar)
919 {
920         ar5523_tx_work_locked(ar);
921 
922         /* Don't waste time trying to flush if USB is disconnected */
923         if (test_bit(AR5523_USB_DISCONNECTED, &ar->flags))
924                 return;
925         if (!wait_event_timeout(ar->tx_flush_waitq,
926             !atomic_read(&ar->tx_nr_pending), AR5523_FLUSH_TIMEOUT))
927                 ar5523_err(ar, "flush timeout (tot %d pend %d)\n",
928                            atomic_read(&ar->tx_nr_total),
929                            atomic_read(&ar->tx_nr_pending));
930 }
931 
932 static void ar5523_free_tx_cmd(struct ar5523 *ar)
933 {
934         struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
935 
936         usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ, cmd->buf_tx,
937                           cmd->urb_tx->transfer_dma);
938         usb_free_urb(cmd->urb_tx);
939 }
940 
941 static int ar5523_alloc_tx_cmd(struct ar5523 *ar)
942 {
943         struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
944 
945         cmd->ar = ar;
946         init_completion(&cmd->done);
947 
948         cmd->urb_tx = usb_alloc_urb(0, GFP_KERNEL);
949         if (!cmd->urb_tx)
950                 return -ENOMEM;
951         cmd->buf_tx = usb_alloc_coherent(ar->dev, AR5523_MAX_TXCMDSZ,
952                                          GFP_KERNEL,
953                                          &cmd->urb_tx->transfer_dma);
954         if (!cmd->buf_tx) {
955                 usb_free_urb(cmd->urb_tx);
956                 return -ENOMEM;
957         }
958         return 0;
959 }
960 
961 /*
962  * This function is called periodically (every second) when associated to
963  * query device statistics.
964  */
965 static void ar5523_stat_work(struct work_struct *work)
966 {
967         struct ar5523 *ar = container_of(work, struct ar5523, stat_work.work);
968         int error;
969 
970         ar5523_dbg(ar, "%s\n", __func__);
971         mutex_lock(&ar->mutex);
972 
973         /*
974          * Send request for statistics asynchronously once a second. This
975          * seems to be important. Throughput is a lot better if this is done.
976          */
977         error = ar5523_cmd_write(ar, WDCMSG_TARGET_GET_STATS, NULL, 0, 0);
978         if (error)
979                 ar5523_err(ar, "could not query stats, error %d\n", error);
980         mutex_unlock(&ar->mutex);
981         ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, HZ);
982 }
983 
984 /*
985  * Interface routines to the mac80211 stack.
986  */
987 static int ar5523_start(struct ieee80211_hw *hw)
988 {
989         struct ar5523 *ar = hw->priv;
990         int error;
991         __be32 val;
992 
993         ar5523_dbg(ar, "start called\n");
994 
995         mutex_lock(&ar->mutex);
996         val = cpu_to_be32(0);
997         ar5523_cmd_write(ar, WDCMSG_BIND, &val, sizeof(val), 0);
998 
999         /* set MAC address */
1000         ar5523_config_multi(ar, CFG_MAC_ADDR, &ar->hw->wiphy->perm_addr,
1001                             ETH_ALEN);
1002 
1003         /* XXX honor net80211 state */
1004         ar5523_config(ar, CFG_RATE_CONTROL_ENABLE, 0x00000001);
1005         ar5523_config(ar, CFG_DIVERSITY_CTL, 0x00000001);
1006         ar5523_config(ar, CFG_ABOLT, 0x0000003f);
1007         ar5523_config(ar, CFG_WME_ENABLED, 0x00000000);
1008 
1009         ar5523_config(ar, CFG_SERVICE_TYPE, 1);
1010         ar5523_config(ar, CFG_TP_SCALE, 0x00000000);
1011         ar5523_config(ar, CFG_TPC_HALF_DBM5, 0x0000003c);
1012         ar5523_config(ar, CFG_TPC_HALF_DBM2, 0x0000003c);
1013         ar5523_config(ar, CFG_OVERRD_TX_POWER, 0x00000000);
1014         ar5523_config(ar, CFG_GMODE_PROTECTION, 0x00000000);
1015         ar5523_config(ar, CFG_GMODE_PROTECT_RATE_INDEX, 0x00000003);
1016         ar5523_config(ar, CFG_PROTECTION_TYPE, 0x00000000);
1017         ar5523_config(ar, CFG_MODE_CTS, 0x00000002);
1018 
1019         error = ar5523_cmd_read(ar, WDCMSG_TARGET_START, NULL, 0,
1020             &val, sizeof(val), AR5523_CMD_FLAG_MAGIC);
1021         if (error) {
1022                 ar5523_dbg(ar, "could not start target, error %d\n", error);
1023                 goto err;
1024         }
1025         ar5523_dbg(ar, "WDCMSG_TARGET_START returns handle: 0x%x\n",
1026                    be32_to_cpu(val));
1027 
1028         ar5523_switch_chan(ar);
1029 
1030         val = cpu_to_be32(TARGET_DEVICE_AWAKE);
1031         ar5523_cmd_write(ar, WDCMSG_SET_PWR_MODE, &val, sizeof(val), 0);
1032         /* XXX? check */
1033         ar5523_cmd_write(ar, WDCMSG_RESET_KEY_CACHE, NULL, 0, 0);
1034 
1035         set_bit(AR5523_HW_UP, &ar->flags);
1036         queue_work(ar->wq, &ar->rx_refill_work);
1037 
1038         /* enable Rx */
1039         ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1040         ar5523_set_rxfilter(ar,
1041                             UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1042                             UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON,
1043                             UATH_FILTER_OP_SET);
1044 
1045         ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_ON);
1046         ar5523_dbg(ar, "start OK\n");
1047 
1048 err:
1049         mutex_unlock(&ar->mutex);
1050         return error;
1051 }
1052 
1053 static void ar5523_stop(struct ieee80211_hw *hw)
1054 {
1055         struct ar5523 *ar = hw->priv;
1056 
1057         ar5523_dbg(ar, "stop called\n");
1058 
1059         cancel_delayed_work_sync(&ar->stat_work);
1060         mutex_lock(&ar->mutex);
1061         clear_bit(AR5523_HW_UP, &ar->flags);
1062 
1063         ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1064         ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_OFF);
1065 
1066         ar5523_cmd_write(ar, WDCMSG_TARGET_STOP, NULL, 0, 0);
1067 
1068         del_timer_sync(&ar->tx_wd_timer);
1069         cancel_work_sync(&ar->tx_wd_work);
1070         cancel_work_sync(&ar->rx_refill_work);
1071         ar5523_cancel_rx_bufs(ar);
1072         mutex_unlock(&ar->mutex);
1073 }
1074 
1075 static int ar5523_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1076 {
1077         struct ar5523 *ar = hw->priv;
1078         int ret;
1079 
1080         ar5523_dbg(ar, "set_rts_threshold called\n");
1081         mutex_lock(&ar->mutex);
1082 
1083         ret = ar5523_config(ar, CFG_USER_RTS_THRESHOLD, value);
1084 
1085         mutex_unlock(&ar->mutex);
1086         return ret;
1087 }
1088 
1089 static void ar5523_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1090                          u32 queues, bool drop)
1091 {
1092         struct ar5523 *ar = hw->priv;
1093 
1094         ar5523_dbg(ar, "flush called\n");
1095         ar5523_flush_tx(ar);
1096 }
1097 
1098 static int ar5523_add_interface(struct ieee80211_hw *hw,
1099                                 struct ieee80211_vif *vif)
1100 {
1101         struct ar5523 *ar = hw->priv;
1102 
1103         ar5523_dbg(ar, "add interface called\n");
1104 
1105         if (ar->vif) {
1106                 ar5523_dbg(ar, "invalid add_interface\n");
1107                 return -EOPNOTSUPP;
1108         }
1109 
1110         switch (vif->type) {
1111         case NL80211_IFTYPE_STATION:
1112                 ar->vif = vif;
1113                 break;
1114         default:
1115                 return -EOPNOTSUPP;
1116         }
1117         return 0;
1118 }
1119 
1120 static void ar5523_remove_interface(struct ieee80211_hw *hw,
1121                                     struct ieee80211_vif *vif)
1122 {
1123         struct ar5523 *ar = hw->priv;
1124 
1125         ar5523_dbg(ar, "remove interface called\n");
1126         ar->vif = NULL;
1127 }
1128 
1129 static int ar5523_hwconfig(struct ieee80211_hw *hw, u32 changed)
1130 {
1131         struct ar5523 *ar = hw->priv;
1132 
1133         ar5523_dbg(ar, "config called\n");
1134         mutex_lock(&ar->mutex);
1135         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1136                 ar5523_dbg(ar, "Do channel switch\n");
1137                 ar5523_flush_tx(ar);
1138                 ar5523_switch_chan(ar);
1139         }
1140         mutex_unlock(&ar->mutex);
1141         return 0;
1142 }
1143 
1144 static int ar5523_get_wlan_mode(struct ar5523 *ar,
1145                                 struct ieee80211_bss_conf *bss_conf)
1146 {
1147         struct ieee80211_supported_band *band;
1148         int bit;
1149         struct ieee80211_sta *sta;
1150         u32 sta_rate_set;
1151 
1152         band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1153         sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1154         if (!sta) {
1155                 ar5523_info(ar, "STA not found!\n");
1156                 return WLAN_MODE_11b;
1157         }
1158         sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
1159 
1160         for (bit = 0; bit < band->n_bitrates; bit++) {
1161                 if (sta_rate_set & 1) {
1162                         int rate = band->bitrates[bit].bitrate;
1163                         switch (rate) {
1164                         case 60:
1165                         case 90:
1166                         case 120:
1167                         case 180:
1168                         case 240:
1169                         case 360:
1170                         case 480:
1171                         case 540:
1172                                 return WLAN_MODE_11g;
1173                         }
1174                 }
1175                 sta_rate_set >>= 1;
1176         }
1177         return WLAN_MODE_11b;
1178 }
1179 
1180 static void ar5523_create_rateset(struct ar5523 *ar,
1181                                   struct ieee80211_bss_conf *bss_conf,
1182                                   struct ar5523_cmd_rateset *rs,
1183                                   bool basic)
1184 {
1185         struct ieee80211_supported_band *band;
1186         struct ieee80211_sta *sta;
1187         int bit, i = 0;
1188         u32 sta_rate_set, basic_rate_set;
1189 
1190         sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1191         basic_rate_set = bss_conf->basic_rates;
1192         if (!sta) {
1193                 ar5523_info(ar, "STA not found. Cannot set rates\n");
1194                 sta_rate_set = bss_conf->basic_rates;
1195         } else
1196                 sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
1197 
1198         ar5523_dbg(ar, "sta rate_set = %08x\n", sta_rate_set);
1199 
1200         band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1201         for (bit = 0; bit < band->n_bitrates; bit++) {
1202                 BUG_ON(i >= AR5523_MAX_NRATES);
1203                 ar5523_dbg(ar, "Considering rate %d : %d\n",
1204                            band->bitrates[bit].hw_value, sta_rate_set & 1);
1205                 if (sta_rate_set & 1) {
1206                         rs->set[i] = band->bitrates[bit].hw_value;
1207                         if (basic_rate_set & 1 && basic)
1208                                 rs->set[i] |= 0x80;
1209                         i++;
1210                 }
1211                 sta_rate_set >>= 1;
1212                 basic_rate_set >>= 1;
1213         }
1214 
1215         rs->length = i;
1216 }
1217 
1218 static int ar5523_set_basic_rates(struct ar5523 *ar,
1219                                   struct ieee80211_bss_conf *bss)
1220 {
1221         struct ar5523_cmd_rates rates;
1222 
1223         memset(&rates, 0, sizeof(rates));
1224         rates.connid = cpu_to_be32(2);          /* XXX */
1225         rates.size   = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1226         ar5523_create_rateset(ar, bss, &rates.rateset, true);
1227 
1228         return ar5523_cmd_write(ar, WDCMSG_SET_BASIC_RATE, &rates,
1229                                 sizeof(rates), 0);
1230 }
1231 
1232 static int ar5523_create_connection(struct ar5523 *ar,
1233                                     struct ieee80211_vif *vif,
1234                                     struct ieee80211_bss_conf *bss)
1235 {
1236         struct ar5523_cmd_create_connection create;
1237         int wlan_mode;
1238 
1239         memset(&create, 0, sizeof(create));
1240         create.connid = cpu_to_be32(2);
1241         create.bssid = cpu_to_be32(0);
1242         /* XXX packed or not?  */
1243         create.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1244 
1245         ar5523_create_rateset(ar, bss, &create.connattr.rateset, false);
1246 
1247         wlan_mode = ar5523_get_wlan_mode(ar, bss);
1248         create.connattr.wlanmode = cpu_to_be32(wlan_mode);
1249 
1250         return ar5523_cmd_write(ar, WDCMSG_CREATE_CONNECTION, &create,
1251                                 sizeof(create), 0);
1252 }
1253 
1254 static int ar5523_write_associd(struct ar5523 *ar,
1255                                 struct ieee80211_bss_conf *bss)
1256 {
1257         struct ar5523_cmd_set_associd associd;
1258 
1259         memset(&associd, 0, sizeof(associd));
1260         associd.defaultrateix = cpu_to_be32(0); /* XXX */
1261         associd.associd = cpu_to_be32(bss->aid);
1262         associd.timoffset = cpu_to_be32(0x3b);  /* XXX */
1263         memcpy(associd.bssid, bss->bssid, ETH_ALEN);
1264         return ar5523_cmd_write(ar, WDCMSG_WRITE_ASSOCID, &associd,
1265                                 sizeof(associd), 0);
1266 }
1267 
1268 static void ar5523_bss_info_changed(struct ieee80211_hw *hw,
1269                                     struct ieee80211_vif *vif,
1270                                     struct ieee80211_bss_conf *bss,
1271                                     u32 changed)
1272 {
1273         struct ar5523 *ar = hw->priv;
1274         int error;
1275 
1276         ar5523_dbg(ar, "bss_info_changed called\n");
1277         mutex_lock(&ar->mutex);
1278 
1279         if (!(changed & BSS_CHANGED_ASSOC))
1280                 goto out_unlock;
1281 
1282         if (bss->assoc) {
1283                 error = ar5523_create_connection(ar, vif, bss);
1284                 if (error) {
1285                         ar5523_err(ar, "could not create connection\n");
1286                         goto out_unlock;
1287                 }
1288 
1289                 error = ar5523_set_basic_rates(ar, bss);
1290                 if (error) {
1291                         ar5523_err(ar, "could not set negotiated rate set\n");
1292                         goto out_unlock;
1293                 }
1294 
1295                 error = ar5523_write_associd(ar, bss);
1296                 if (error) {
1297                         ar5523_err(ar, "could not set association\n");
1298                         goto out_unlock;
1299                 }
1300 
1301                 /* turn link LED on */
1302                 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_ON);
1303                 set_bit(AR5523_CONNECTED, &ar->flags);
1304                 ieee80211_queue_delayed_work(hw, &ar->stat_work, HZ);
1305 
1306         } else {
1307                 cancel_delayed_work(&ar->stat_work);
1308                 clear_bit(AR5523_CONNECTED, &ar->flags);
1309                 ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1310         }
1311 
1312 out_unlock:
1313         mutex_unlock(&ar->mutex);
1314 
1315 }
1316 
1317 #define AR5523_SUPPORTED_FILTERS (FIF_ALLMULTI | \
1318                                   FIF_FCSFAIL | \
1319                                   FIF_OTHER_BSS)
1320 
1321 static void ar5523_configure_filter(struct ieee80211_hw *hw,
1322                                     unsigned int changed_flags,
1323                                     unsigned int *total_flags,
1324                                     u64 multicast)
1325 {
1326         struct ar5523 *ar = hw->priv;
1327         u32 filter = 0;
1328 
1329         ar5523_dbg(ar, "configure_filter called\n");
1330         mutex_lock(&ar->mutex);
1331         ar5523_flush_tx(ar);
1332 
1333         *total_flags &= AR5523_SUPPORTED_FILTERS;
1334 
1335         /* The filters seems strange. UATH_FILTER_RX_BCAST and
1336          * UATH_FILTER_RX_MCAST does not result in those frames being RXed.
1337          * The only way I have found to get [mb]cast frames seems to be
1338          * to set UATH_FILTER_RX_PROM. */
1339         filter |= UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1340                   UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON |
1341                   UATH_FILTER_RX_PROM;
1342 
1343         ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1344         ar5523_set_rxfilter(ar, filter, UATH_FILTER_OP_SET);
1345 
1346         mutex_unlock(&ar->mutex);
1347 }
1348 
1349 static const struct ieee80211_ops ar5523_ops = {
1350         .start                  = ar5523_start,
1351         .stop                   = ar5523_stop,
1352         .tx                     = ar5523_tx,
1353         .set_rts_threshold      = ar5523_set_rts_threshold,
1354         .add_interface          = ar5523_add_interface,
1355         .remove_interface       = ar5523_remove_interface,
1356         .config                 = ar5523_hwconfig,
1357         .bss_info_changed       = ar5523_bss_info_changed,
1358         .configure_filter       = ar5523_configure_filter,
1359         .flush                  = ar5523_flush,
1360 };
1361 
1362 static int ar5523_host_available(struct ar5523 *ar)
1363 {
1364         struct ar5523_cmd_host_available setup;
1365 
1366         /* inform target the host is available */
1367         setup.sw_ver_major = cpu_to_be32(ATH_SW_VER_MAJOR);
1368         setup.sw_ver_minor = cpu_to_be32(ATH_SW_VER_MINOR);
1369         setup.sw_ver_patch = cpu_to_be32(ATH_SW_VER_PATCH);
1370         setup.sw_ver_build = cpu_to_be32(ATH_SW_VER_BUILD);
1371         return ar5523_cmd_read(ar, WDCMSG_HOST_AVAILABLE,
1372                                &setup, sizeof(setup), NULL, 0, 0);
1373 }
1374 
1375 static int ar5523_get_devstatus(struct ar5523 *ar)
1376 {
1377         u8 macaddr[ETH_ALEN];
1378         int error;
1379 
1380         /* retrieve MAC address */
1381         error = ar5523_get_status(ar, ST_MAC_ADDR, macaddr, ETH_ALEN);
1382         if (error) {
1383                 ar5523_err(ar, "could not read MAC address\n");
1384                 return error;
1385         }
1386 
1387         SET_IEEE80211_PERM_ADDR(ar->hw, macaddr);
1388 
1389         error = ar5523_get_status(ar, ST_SERIAL_NUMBER,
1390             &ar->serial[0], sizeof(ar->serial));
1391         if (error) {
1392                 ar5523_err(ar, "could not read device serial number\n");
1393                 return error;
1394         }
1395         return 0;
1396 }
1397 
1398 #define AR5523_SANE_RXBUFSZ 2000
1399 
1400 static int ar5523_get_max_rxsz(struct ar5523 *ar)
1401 {
1402         int error;
1403         __be32 rxsize;
1404 
1405         /* Get max rx size */
1406         error = ar5523_get_status(ar, ST_WDC_TRANSPORT_CHUNK_SIZE, &rxsize,
1407                                   sizeof(rxsize));
1408         if (error != 0) {
1409                 ar5523_err(ar, "could not read max RX size\n");
1410                 return error;
1411         }
1412 
1413         ar->rxbufsz = be32_to_cpu(rxsize);
1414 
1415         if (!ar->rxbufsz || ar->rxbufsz > AR5523_SANE_RXBUFSZ) {
1416                 ar5523_err(ar, "Bad rxbufsz from device. Using %d instead\n",
1417                            AR5523_SANE_RXBUFSZ);
1418                 ar->rxbufsz = AR5523_SANE_RXBUFSZ;
1419         }
1420 
1421         ar5523_dbg(ar, "Max RX buf size: %d\n", ar->rxbufsz);
1422         return 0;
1423 }
1424 
1425 /*
1426  * This is copied from rtl818x, but we should probably move this
1427  * to common code as in OpenBSD.
1428  */
1429 static const struct ieee80211_rate ar5523_rates[] = {
1430         { .bitrate = 10, .hw_value = 2, },
1431         { .bitrate = 20, .hw_value = 4 },
1432         { .bitrate = 55, .hw_value = 11, },
1433         { .bitrate = 110, .hw_value = 22, },
1434         { .bitrate = 60, .hw_value = 12, },
1435         { .bitrate = 90, .hw_value = 18, },
1436         { .bitrate = 120, .hw_value = 24, },
1437         { .bitrate = 180, .hw_value = 36, },
1438         { .bitrate = 240, .hw_value = 48, },
1439         { .bitrate = 360, .hw_value = 72, },
1440         { .bitrate = 480, .hw_value = 96, },
1441         { .bitrate = 540, .hw_value = 108, },
1442 };
1443 
1444 static const struct ieee80211_channel ar5523_channels[] = {
1445         { .center_freq = 2412 },
1446         { .center_freq = 2417 },
1447         { .center_freq = 2422 },
1448         { .center_freq = 2427 },
1449         { .center_freq = 2432 },
1450         { .center_freq = 2437 },
1451         { .center_freq = 2442 },
1452         { .center_freq = 2447 },
1453         { .center_freq = 2452 },
1454         { .center_freq = 2457 },
1455         { .center_freq = 2462 },
1456         { .center_freq = 2467 },
1457         { .center_freq = 2472 },
1458         { .center_freq = 2484 },
1459 };
1460 
1461 static int ar5523_init_modes(struct ar5523 *ar)
1462 {
1463         BUILD_BUG_ON(sizeof(ar->channels) != sizeof(ar5523_channels));
1464         BUILD_BUG_ON(sizeof(ar->rates) != sizeof(ar5523_rates));
1465 
1466         memcpy(ar->channels, ar5523_channels, sizeof(ar5523_channels));
1467         memcpy(ar->rates, ar5523_rates, sizeof(ar5523_rates));
1468 
1469         ar->band.band = NL80211_BAND_2GHZ;
1470         ar->band.channels = ar->channels;
1471         ar->band.n_channels = ARRAY_SIZE(ar5523_channels);
1472         ar->band.bitrates = ar->rates;
1473         ar->band.n_bitrates = ARRAY_SIZE(ar5523_rates);
1474         ar->hw->wiphy->bands[NL80211_BAND_2GHZ] = &ar->band;
1475         return 0;
1476 }
1477 
1478 /*
1479  * Load the MIPS R4000 microcode into the device.  Once the image is loaded,
1480  * the device will detach itself from the bus and reattach later with a new
1481  * product Id (a la ezusb).
1482  */
1483 static int ar5523_load_firmware(struct usb_device *dev)
1484 {
1485         struct ar5523_fwblock *txblock, *rxblock;
1486         const struct firmware *fw;
1487         void *fwbuf;
1488         int len, offset;
1489         int foolen; /* XXX(hch): handle short transfers */
1490         int error = -ENXIO;
1491 
1492         if (request_firmware(&fw, AR5523_FIRMWARE_FILE, &dev->dev)) {
1493                 dev_err(&dev->dev, "no firmware found: %s\n",
1494                         AR5523_FIRMWARE_FILE);
1495                 return -ENOENT;
1496         }
1497 
1498         txblock = kmalloc(sizeof(*txblock), GFP_KERNEL);
1499         if (!txblock)
1500                 goto out;
1501 
1502         rxblock = kmalloc(sizeof(*rxblock), GFP_KERNEL);
1503         if (!rxblock)
1504                 goto out_free_txblock;
1505 
1506         fwbuf = kmalloc(AR5523_MAX_FWBLOCK_SIZE, GFP_KERNEL);
1507         if (!fwbuf)
1508                 goto out_free_rxblock;
1509 
1510         memset(txblock, 0, sizeof(struct ar5523_fwblock));
1511         txblock->flags = cpu_to_be32(AR5523_WRITE_BLOCK);
1512         txblock->total = cpu_to_be32(fw->size);
1513 
1514         offset = 0;
1515         len = fw->size;
1516         while (len > 0) {
1517                 int mlen = min(len, AR5523_MAX_FWBLOCK_SIZE);
1518 
1519                 txblock->remain = cpu_to_be32(len - mlen);
1520                 txblock->len = cpu_to_be32(mlen);
1521 
1522                 /* send firmware block meta-data */
1523                 error = usb_bulk_msg(dev, ar5523_cmd_tx_pipe(dev),
1524                                      txblock, sizeof(*txblock), &foolen,
1525                                      AR5523_CMD_TIMEOUT);
1526                 if (error) {
1527                         dev_err(&dev->dev,
1528                                 "could not send firmware block info\n");
1529                         goto out_free_fwbuf;
1530                 }
1531 
1532                 /* send firmware block data */
1533                 memcpy(fwbuf, fw->data + offset, mlen);
1534                 error = usb_bulk_msg(dev, ar5523_data_tx_pipe(dev),
1535                                      fwbuf, mlen, &foolen,
1536                                      AR5523_DATA_TIMEOUT);
1537                 if (error) {
1538                         dev_err(&dev->dev,
1539                                 "could not send firmware block data\n");
1540                         goto out_free_fwbuf;
1541                 }
1542 
1543                 /* wait for ack from firmware */
1544                 error = usb_bulk_msg(dev, ar5523_cmd_rx_pipe(dev),
1545                                      rxblock, sizeof(*rxblock), &foolen,
1546                                      AR5523_CMD_TIMEOUT);
1547                 if (error) {
1548                         dev_err(&dev->dev,
1549                                 "could not read firmware answer\n");
1550                         goto out_free_fwbuf;
1551                 }
1552 
1553                 len -= mlen;
1554                 offset += mlen;
1555         }
1556 
1557         /*
1558          * Set the error to -ENXIO to make sure we continue probing for
1559          * a driver.
1560          */
1561         error = -ENXIO;
1562 
1563  out_free_fwbuf:
1564         kfree(fwbuf);
1565  out_free_rxblock:
1566         kfree(rxblock);
1567  out_free_txblock:
1568         kfree(txblock);
1569  out:
1570         release_firmware(fw);
1571         return error;
1572 }
1573 
1574 static int ar5523_probe(struct usb_interface *intf,
1575                         const struct usb_device_id *id)
1576 {
1577         struct usb_device *dev = interface_to_usbdev(intf);
1578         struct ieee80211_hw *hw;
1579         struct ar5523 *ar;
1580         int error = -ENOMEM;
1581 
1582         /*
1583          * Load firmware if the device requires it.  This will return
1584          * -ENXIO on success and we'll get called back afer the usb
1585          * id changes to indicate that the firmware is present.
1586          */
1587         if (id->driver_info & AR5523_FLAG_PRE_FIRMWARE)
1588                 return ar5523_load_firmware(dev);
1589 
1590 
1591         hw = ieee80211_alloc_hw(sizeof(*ar), &ar5523_ops);
1592         if (!hw)
1593                 goto out;
1594         SET_IEEE80211_DEV(hw, &intf->dev);
1595 
1596         ar = hw->priv;
1597         ar->hw = hw;
1598         ar->dev = dev;
1599         mutex_init(&ar->mutex);
1600 
1601         INIT_DELAYED_WORK(&ar->stat_work, ar5523_stat_work);
1602         init_timer(&ar->tx_wd_timer);
1603         setup_timer(&ar->tx_wd_timer, ar5523_tx_wd_timer, (unsigned long) ar);
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          * We're now ready to send/receive firmware commands.
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         usb_set_intfdata(intf, hw);
1693 
1694         error = ieee80211_register_hw(hw);
1695         if (error) {
1696                 ar5523_err(ar, "could not register device\n");
1697                 goto out_cancel_rx_cmd;
1698         }
1699 
1700         ar5523_info(ar, "Found and initialized AR5523 device\n");
1701         return 0;
1702 
1703 out_cancel_rx_cmd:
1704         ar5523_cancel_rx_cmd(ar);
1705 out_free_tx_cmd:
1706         ar5523_free_tx_cmd(ar);
1707 out_free_rx_cmd:
1708         ar5523_free_rx_cmd(ar);
1709 out_free_rx_bufs:
1710         ar5523_free_rx_bufs(ar);
1711 out_free_wq:
1712         destroy_workqueue(ar->wq);
1713 out_free_ar:
1714         ieee80211_free_hw(hw);
1715 out:
1716         return error;
1717 }
1718 
1719 static void ar5523_disconnect(struct usb_interface *intf)
1720 {
1721         struct ieee80211_hw *hw = usb_get_intfdata(intf);
1722         struct ar5523 *ar = hw->priv;
1723 
1724         ar5523_dbg(ar, "detaching\n");
1725         set_bit(AR5523_USB_DISCONNECTED, &ar->flags);
1726 
1727         ieee80211_unregister_hw(hw);
1728 
1729         ar5523_cancel_rx_cmd(ar);
1730         ar5523_free_tx_cmd(ar);
1731         ar5523_free_rx_cmd(ar);
1732         ar5523_free_rx_bufs(ar);
1733 
1734         destroy_workqueue(ar->wq);
1735 
1736         ieee80211_free_hw(hw);
1737         usb_set_intfdata(intf, NULL);
1738 }
1739 
1740 #define AR5523_DEVICE_UG(vendor, device) \
1741         { USB_DEVICE((vendor), (device)) }, \
1742         { USB_DEVICE((vendor), (device) + 1), \
1743                 .driver_info = AR5523_FLAG_PRE_FIRMWARE }
1744 #define AR5523_DEVICE_UX(vendor, device) \
1745         { USB_DEVICE((vendor), (device)), \
1746                 .driver_info = AR5523_FLAG_ABG }, \
1747         { USB_DEVICE((vendor), (device) + 1), \
1748                 .driver_info = AR5523_FLAG_ABG|AR5523_FLAG_PRE_FIRMWARE }
1749 
1750 static struct usb_device_id ar5523_id_table[] = {
1751         AR5523_DEVICE_UG(0x168c, 0x0001),       /* Atheros / AR5523 */
1752         AR5523_DEVICE_UG(0x0cf3, 0x0001),       /* Atheros2 / AR5523_1 */
1753         AR5523_DEVICE_UG(0x0cf3, 0x0003),       /* Atheros2 / AR5523_2 */
1754         AR5523_DEVICE_UX(0x0cf3, 0x0005),       /* Atheros2 / AR5523_3 */
1755         AR5523_DEVICE_UG(0x0d8e, 0x7801),       /* Conceptronic / AR5523_1 */
1756         AR5523_DEVICE_UX(0x0d8e, 0x7811),       /* Conceptronic / AR5523_2 */
1757         AR5523_DEVICE_UX(0x2001, 0x3a00),       /* Dlink / DWLAG132 */
1758         AR5523_DEVICE_UG(0x2001, 0x3a02),       /* Dlink / DWLG132 */
1759         AR5523_DEVICE_UX(0x2001, 0x3a04),       /* Dlink / DWLAG122 */
1760         AR5523_DEVICE_UG(0x07d1, 0x3a07),       /* D-Link / WUA-2340 rev A1 */
1761         AR5523_DEVICE_UG(0x1690, 0x0712),       /* Gigaset / AR5523 */
1762         AR5523_DEVICE_UG(0x1690, 0x0710),       /* Gigaset / SMCWUSBTG */
1763         AR5523_DEVICE_UG(0x129b, 0x160b),       /* Gigaset / USB stick 108
1764                                                    (CyberTAN Technology) */
1765         AR5523_DEVICE_UG(0x16ab, 0x7801),       /* Globalsun / AR5523_1 */
1766         AR5523_DEVICE_UX(0x16ab, 0x7811),       /* Globalsun / AR5523_2 */
1767         AR5523_DEVICE_UG(0x0d8e, 0x7802),       /* Globalsun / AR5523_3 */
1768         AR5523_DEVICE_UX(0x0846, 0x4300),       /* Netgear / WG111U */
1769         AR5523_DEVICE_UG(0x0846, 0x4250),       /* Netgear / WG111T */
1770         AR5523_DEVICE_UG(0x0846, 0x5f00),       /* Netgear / WPN111 */
1771         AR5523_DEVICE_UG(0x157e, 0x3006),       /* Umedia / AR5523_1 */
1772         AR5523_DEVICE_UX(0x157e, 0x3205),       /* Umedia / AR5523_2 */
1773         AR5523_DEVICE_UG(0x157e, 0x3006),       /* Umedia / TEW444UBEU */
1774         AR5523_DEVICE_UG(0x1435, 0x0826),       /* Wistronneweb / AR5523_1 */
1775         AR5523_DEVICE_UX(0x1435, 0x0828),       /* Wistronneweb / AR5523_2 */
1776         AR5523_DEVICE_UG(0x0cde, 0x0012),       /* Zcom / AR5523 */
1777         AR5523_DEVICE_UG(0x1385, 0x4250),       /* Netgear3 / WG111T (2) */
1778         AR5523_DEVICE_UG(0x1385, 0x5f00),       /* Netgear / WPN111 */
1779         AR5523_DEVICE_UG(0x1385, 0x5f02),       /* Netgear / WPN111 */
1780         { }
1781 };
1782 MODULE_DEVICE_TABLE(usb, ar5523_id_table);
1783 
1784 static struct usb_driver ar5523_driver = {
1785         .name           = "ar5523",
1786         .id_table       = ar5523_id_table,
1787         .probe          = ar5523_probe,
1788         .disconnect     = ar5523_disconnect,
1789 };
1790 
1791 module_usb_driver(ar5523_driver);
1792 
1793 MODULE_LICENSE("Dual BSD/GPL");
1794 MODULE_FIRMWARE(AR5523_FIRMWARE_FILE);
1795 

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