Commit | Line | Data |
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95ea3627 | 1 | /* |
7e613e16 ID |
2 | Copyright (C) 2010 Willow Garage <http://www.willowgarage.com> |
3 | Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> | |
95ea3627 ID |
4 | <http://rt2x00.serialmonkey.com> |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the | |
18 | Free Software Foundation, Inc., | |
19 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | /* | |
23 | Module: rt2x00usb | |
24 | Abstract: rt2x00 generic usb device routines. | |
25 | */ | |
26 | ||
95ea3627 ID |
27 | #include <linux/kernel.h> |
28 | #include <linux/module.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
95ea3627 | 30 | #include <linux/usb.h> |
3d82346c | 31 | #include <linux/bug.h> |
95ea3627 ID |
32 | |
33 | #include "rt2x00.h" | |
34 | #include "rt2x00usb.h" | |
35 | ||
36 | /* | |
37 | * Interfacing with the HW. | |
38 | */ | |
0e14f6d3 | 39 | int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev, |
95ea3627 ID |
40 | const u8 request, const u8 requesttype, |
41 | const u16 offset, const u16 value, | |
42 | void *buffer, const u16 buffer_length, | |
e9136550 | 43 | const int timeout) |
95ea3627 | 44 | { |
c1d35dfa | 45 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
95ea3627 ID |
46 | int status; |
47 | unsigned int i; | |
48 | unsigned int pipe = | |
49 | (requesttype == USB_VENDOR_REQUEST_IN) ? | |
50 | usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0); | |
51 | ||
66f84d65 SC |
52 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
53 | return -ENODEV; | |
3d82346c | 54 | |
95ea3627 ID |
55 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
56 | status = usb_control_msg(usb_dev, pipe, request, requesttype, | |
57 | value, offset, buffer, buffer_length, | |
58 | timeout); | |
59 | if (status >= 0) | |
60 | return 0; | |
61 | ||
62 | /* | |
e9136550 | 63 | * Check for errors |
95ea3627 | 64 | * -ENODEV: Device has disappeared, no point continuing. |
e9136550 | 65 | * All other errors: Try again. |
95ea3627 | 66 | */ |
66f84d65 SC |
67 | else if (status == -ENODEV) { |
68 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
95ea3627 | 69 | break; |
66f84d65 | 70 | } |
95ea3627 ID |
71 | } |
72 | ||
73 | ERROR(rt2x00dev, | |
74 | "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n", | |
75 | request, offset, status); | |
76 | ||
77 | return status; | |
78 | } | |
79 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request); | |
80 | ||
3d82346c AB |
81 | int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev, |
82 | const u8 request, const u8 requesttype, | |
83 | const u16 offset, void *buffer, | |
84 | const u16 buffer_length, const int timeout) | |
95ea3627 ID |
85 | { |
86 | int status; | |
87 | ||
8ff48a8b | 88 | BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex)); |
3d82346c | 89 | |
95ea3627 ID |
90 | /* |
91 | * Check for Cache availability. | |
92 | */ | |
21795094 | 93 | if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) { |
95ea3627 ID |
94 | ERROR(rt2x00dev, "CSR cache not available.\n"); |
95 | return -ENOMEM; | |
96 | } | |
97 | ||
98 | if (requesttype == USB_VENDOR_REQUEST_OUT) | |
21795094 | 99 | memcpy(rt2x00dev->csr.cache, buffer, buffer_length); |
95ea3627 ID |
100 | |
101 | status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype, | |
21795094 | 102 | offset, 0, rt2x00dev->csr.cache, |
95ea3627 ID |
103 | buffer_length, timeout); |
104 | ||
105 | if (!status && requesttype == USB_VENDOR_REQUEST_IN) | |
21795094 | 106 | memcpy(buffer, rt2x00dev->csr.cache, buffer_length); |
95ea3627 ID |
107 | |
108 | return status; | |
109 | } | |
3d82346c AB |
110 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock); |
111 | ||
112 | int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev, | |
113 | const u8 request, const u8 requesttype, | |
114 | const u16 offset, void *buffer, | |
115 | const u16 buffer_length, const int timeout) | |
ed0dbeeb IM |
116 | { |
117 | int status = 0; | |
118 | unsigned char *tb; | |
119 | u16 off, len, bsize; | |
120 | ||
8ff48a8b | 121 | mutex_lock(&rt2x00dev->csr_mutex); |
ed0dbeeb | 122 | |
82f97b8d | 123 | tb = (char *)buffer; |
ed0dbeeb IM |
124 | off = offset; |
125 | len = buffer_length; | |
126 | while (len && !status) { | |
127 | bsize = min_t(u16, CSR_CACHE_SIZE, len); | |
128 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
129 | requesttype, off, tb, | |
130 | bsize, timeout); | |
131 | ||
132 | tb += bsize; | |
133 | len -= bsize; | |
134 | off += bsize; | |
135 | } | |
136 | ||
8ff48a8b | 137 | mutex_unlock(&rt2x00dev->csr_mutex); |
ed0dbeeb IM |
138 | |
139 | return status; | |
140 | } | |
96b61baf | 141 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff); |
ed0dbeeb | 142 | |
0f829b1d ID |
143 | int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev, |
144 | const unsigned int offset, | |
f255b92b | 145 | const struct rt2x00_field32 field, |
0f829b1d ID |
146 | u32 *reg) |
147 | { | |
148 | unsigned int i; | |
149 | ||
66f84d65 SC |
150 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
151 | return -ENODEV; | |
152 | ||
0f829b1d ID |
153 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
154 | rt2x00usb_register_read_lock(rt2x00dev, offset, reg); | |
155 | if (!rt2x00_get_field32(*reg, field)) | |
156 | return 1; | |
157 | udelay(REGISTER_BUSY_DELAY); | |
158 | } | |
159 | ||
160 | ERROR(rt2x00dev, "Indirect register access failed: " | |
161 | "offset=0x%.08x, value=0x%.08x\n", offset, *reg); | |
162 | *reg = ~0; | |
163 | ||
164 | return 0; | |
165 | } | |
166 | EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read); | |
167 | ||
95ea3627 ID |
168 | /* |
169 | * TX data handlers. | |
170 | */ | |
7e613e16 | 171 | static void rt2x00usb_work_txdone_entry(struct queue_entry *entry) |
95ea3627 | 172 | { |
95ea3627 | 173 | /* |
7e613e16 | 174 | * If the transfer to hardware succeeded, it does not mean the |
fb55f4d1 ID |
175 | * frame was send out correctly. It only means the frame |
176 | * was succesfully pushed to the hardware, we have no | |
177 | * way to determine the transmission status right now. | |
178 | * (Only indirectly by looking at the failed TX counters | |
179 | * in the register). | |
95ea3627 | 180 | */ |
7e613e16 | 181 | if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags)) |
3392bece | 182 | rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE); |
7e613e16 | 183 | else |
3392bece | 184 | rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN); |
95ea3627 ID |
185 | } |
186 | ||
7e613e16 ID |
187 | static void rt2x00usb_work_txdone(struct work_struct *work) |
188 | { | |
189 | struct rt2x00_dev *rt2x00dev = | |
190 | container_of(work, struct rt2x00_dev, txdone_work); | |
191 | struct data_queue *queue; | |
192 | struct queue_entry *entry; | |
193 | ||
194 | tx_queue_for_each(rt2x00dev, queue) { | |
195 | while (!rt2x00queue_empty(queue)) { | |
196 | entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE); | |
197 | ||
198 | if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) | |
199 | break; | |
200 | ||
201 | rt2x00usb_work_txdone_entry(entry); | |
202 | } | |
203 | } | |
204 | } | |
205 | ||
206 | static void rt2x00usb_interrupt_txdone(struct urb *urb) | |
207 | { | |
208 | struct queue_entry *entry = (struct queue_entry *)urb->context; | |
209 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
210 | ||
a1d1eabc | 211 | if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
7e613e16 ID |
212 | return; |
213 | ||
652a9dd2 ID |
214 | /* |
215 | * Report the frame as DMA done | |
216 | */ | |
217 | rt2x00lib_dmadone(entry); | |
218 | ||
7e613e16 ID |
219 | /* |
220 | * Check if the frame was correctly uploaded | |
221 | */ | |
222 | if (urb->status) | |
a1d1eabc | 223 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
7e613e16 ID |
224 | |
225 | /* | |
226 | * Schedule the delayed work for reading the TX status | |
227 | * from the device. | |
228 | */ | |
070192dd | 229 | ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->txdone_work); |
7e613e16 ID |
230 | } |
231 | ||
5eb7efe8 | 232 | static void rt2x00usb_kick_tx_entry(struct queue_entry *entry) |
f019d514 | 233 | { |
fe725697 GW |
234 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
235 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
f019d514 | 236 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
fe725697 | 237 | u32 length; |
d7bb5f84 | 238 | int status; |
fe725697 | 239 | |
ee1e755f ID |
240 | if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) |
241 | return; | |
fe725697 | 242 | |
ee1e755f ID |
243 | /* |
244 | * USB devices cannot blindly pass the skb->len as the | |
245 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
246 | * to the driver to determine what the length should be. | |
247 | */ | |
248 | length = rt2x00dev->ops->lib->get_tx_data_len(entry); | |
f019d514 | 249 | |
ee1e755f ID |
250 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
251 | usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
252 | entry->skb->data, length, | |
253 | rt2x00usb_interrupt_txdone, entry); | |
254 | ||
d7bb5f84 JS |
255 | status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
256 | if (status) { | |
257 | if (status == -ENODEV) | |
258 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
a13c8f31 ID |
259 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
260 | rt2x00lib_dmadone(entry); | |
261 | } | |
f019d514 ID |
262 | } |
263 | ||
0b7fde54 ID |
264 | /* |
265 | * RX data handlers. | |
266 | */ | |
267 | static void rt2x00usb_work_rxdone(struct work_struct *work) | |
268 | { | |
269 | struct rt2x00_dev *rt2x00dev = | |
270 | container_of(work, struct rt2x00_dev, rxdone_work); | |
271 | struct queue_entry *entry; | |
272 | struct skb_frame_desc *skbdesc; | |
273 | u8 rxd[32]; | |
274 | ||
275 | while (!rt2x00queue_empty(rt2x00dev->rx)) { | |
276 | entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE); | |
277 | ||
278 | if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) | |
279 | break; | |
280 | ||
281 | /* | |
282 | * Fill in desc fields of the skb descriptor | |
283 | */ | |
284 | skbdesc = get_skb_frame_desc(entry->skb); | |
285 | skbdesc->desc = rxd; | |
286 | skbdesc->desc_len = entry->queue->desc_size; | |
287 | ||
288 | /* | |
289 | * Send the frame to rt2x00lib for further processing. | |
290 | */ | |
291 | rt2x00lib_rxdone(entry); | |
292 | } | |
293 | } | |
294 | ||
295 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
296 | { | |
297 | struct queue_entry *entry = (struct queue_entry *)urb->context; | |
298 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
299 | ||
300 | if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) | |
301 | return; | |
302 | ||
303 | /* | |
304 | * Report the frame as DMA done | |
305 | */ | |
306 | rt2x00lib_dmadone(entry); | |
307 | ||
308 | /* | |
309 | * Check if the received data is simply too small | |
310 | * to be actually valid, or if the urb is signaling | |
311 | * a problem. | |
312 | */ | |
313 | if (urb->actual_length < entry->queue->desc_size || urb->status) | |
314 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
315 | ||
316 | /* | |
317 | * Schedule the delayed work for reading the RX status | |
318 | * from the device. | |
319 | */ | |
320 | ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->rxdone_work); | |
321 | } | |
322 | ||
323 | static void rt2x00usb_kick_rx_entry(struct queue_entry *entry) | |
324 | { | |
325 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
326 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
327 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
328 | int status; | |
329 | ||
330 | if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) | |
331 | return; | |
332 | ||
333 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, | |
334 | usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
335 | entry->skb->data, entry->skb->len, | |
336 | rt2x00usb_interrupt_rxdone, entry); | |
337 | ||
338 | status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
339 | if (status) { | |
340 | if (status == -ENODEV) | |
341 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
342 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
343 | rt2x00lib_dmadone(entry); | |
344 | } | |
345 | } | |
346 | ||
dbba306f | 347 | void rt2x00usb_kick_queue(struct data_queue *queue) |
f019d514 | 348 | { |
dbba306f ID |
349 | switch (queue->qid) { |
350 | case QID_AC_BE: | |
351 | case QID_AC_BK: | |
352 | case QID_AC_VI: | |
353 | case QID_AC_VO: | |
354 | if (!rt2x00queue_empty(queue)) | |
355 | rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, | |
356 | rt2x00usb_kick_tx_entry); | |
357 | break; | |
0b7fde54 ID |
358 | case QID_RX: |
359 | if (!rt2x00queue_full(queue)) | |
360 | rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, | |
361 | rt2x00usb_kick_rx_entry); | |
362 | break; | |
dbba306f ID |
363 | default: |
364 | break; | |
365 | } | |
f019d514 | 366 | } |
dbba306f | 367 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue); |
f019d514 | 368 | |
5be65609 | 369 | static void rt2x00usb_flush_entry(struct queue_entry *entry) |
a2c9b652 | 370 | { |
5eb7efe8 ID |
371 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
372 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
373 | struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data; | |
a2c9b652 | 374 | |
5eb7efe8 ID |
375 | if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
376 | return; | |
377 | ||
378 | usb_kill_urb(entry_priv->urb); | |
a2c9b652 ID |
379 | |
380 | /* | |
5eb7efe8 | 381 | * Kill guardian urb (if required by driver). |
a2c9b652 | 382 | */ |
5eb7efe8 ID |
383 | if ((entry->queue->qid == QID_BEACON) && |
384 | (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))) | |
385 | usb_kill_urb(bcn_priv->guardian_urb); | |
386 | } | |
a2c9b652 | 387 | |
5be65609 | 388 | void rt2x00usb_flush_queue(struct data_queue *queue) |
5eb7efe8 | 389 | { |
5be65609 ID |
390 | struct work_struct *completion; |
391 | unsigned int i; | |
392 | ||
5eb7efe8 | 393 | rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, |
5be65609 ID |
394 | rt2x00usb_flush_entry); |
395 | ||
396 | /* | |
397 | * Obtain the queue completion handler | |
398 | */ | |
399 | switch (queue->qid) { | |
400 | case QID_AC_BE: | |
401 | case QID_AC_BK: | |
402 | case QID_AC_VI: | |
403 | case QID_AC_VO: | |
404 | completion = &queue->rt2x00dev->txdone_work; | |
405 | break; | |
406 | case QID_RX: | |
407 | completion = &queue->rt2x00dev->rxdone_work; | |
408 | break; | |
409 | default: | |
410 | return; | |
411 | } | |
412 | ||
413 | for (i = 0; i < 20; i++) { | |
414 | /* | |
415 | * Check if the driver is already done, otherwise we | |
416 | * have to sleep a little while to give the driver/hw | |
417 | * the oppurtunity to complete interrupt process itself. | |
418 | */ | |
419 | if (rt2x00queue_empty(queue)) | |
420 | break; | |
421 | ||
422 | /* | |
423 | * Schedule the completion handler manually, when this | |
424 | * worker function runs, it should cleanup the queue. | |
425 | */ | |
426 | ieee80211_queue_work(queue->rt2x00dev->hw, completion); | |
427 | ||
428 | /* | |
429 | * Wait for a little while to give the driver | |
430 | * the oppurtunity to recover itself. | |
431 | */ | |
432 | msleep(10); | |
433 | } | |
a2c9b652 | 434 | } |
5be65609 | 435 | EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue); |
a2c9b652 | 436 | |
652a9dd2 | 437 | static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue) |
c965c74b | 438 | { |
652a9dd2 | 439 | WARNING(queue->rt2x00dev, "TX queue %d DMA timed out," |
094a1d92 | 440 | " invoke forced forced reset\n", queue->qid); |
c965c74b | 441 | |
5be65609 | 442 | rt2x00queue_flush_queue(queue, true); |
c965c74b ID |
443 | } |
444 | ||
652a9dd2 ID |
445 | static void rt2x00usb_watchdog_tx_status(struct data_queue *queue) |
446 | { | |
447 | WARNING(queue->rt2x00dev, "TX queue %d status timed out," | |
094a1d92 | 448 | " invoke forced tx handler\n", queue->qid); |
652a9dd2 ID |
449 | |
450 | ieee80211_queue_work(queue->rt2x00dev->hw, &queue->rt2x00dev->txdone_work); | |
451 | } | |
452 | ||
c965c74b ID |
453 | void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev) |
454 | { | |
455 | struct data_queue *queue; | |
456 | ||
457 | tx_queue_for_each(rt2x00dev, queue) { | |
1a397696 ID |
458 | if (!rt2x00queue_empty(queue)) { |
459 | if (rt2x00queue_dma_timeout(queue)) | |
460 | rt2x00usb_watchdog_tx_dma(queue); | |
7225ce1e | 461 | if (rt2x00queue_status_timeout(queue)) |
1a397696 ID |
462 | rt2x00usb_watchdog_tx_status(queue); |
463 | } | |
c965c74b ID |
464 | } |
465 | } | |
466 | EXPORT_SYMBOL_GPL(rt2x00usb_watchdog); | |
467 | ||
95ea3627 ID |
468 | /* |
469 | * Radio handlers | |
470 | */ | |
95ea3627 ID |
471 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
472 | { | |
bd394a74 | 473 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 | 474 | REGISTER_TIMEOUT); |
95ea3627 ID |
475 | } |
476 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
477 | ||
478 | /* | |
479 | * Device initialization handlers. | |
480 | */ | |
798b7adb | 481 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 482 | { |
7e613e16 ID |
483 | entry->flags = 0; |
484 | ||
0b7fde54 ID |
485 | if (entry->queue->qid == QID_RX) |
486 | rt2x00usb_kick_rx_entry(entry); | |
837e7f24 | 487 | } |
798b7adb | 488 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 489 | |
f1ca2167 ID |
490 | static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
491 | struct usb_endpoint_descriptor *ep_desc) | |
492 | { | |
493 | struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); | |
494 | int pipe; | |
495 | ||
496 | queue->usb_endpoint = usb_endpoint_num(ep_desc); | |
497 | ||
498 | if (queue->qid == QID_RX) { | |
499 | pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); | |
500 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); | |
501 | } else { | |
502 | pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); | |
503 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); | |
504 | } | |
505 | ||
506 | if (!queue->usb_maxpacket) | |
507 | queue->usb_maxpacket = 1; | |
508 | } | |
509 | ||
510 | static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) | |
511 | { | |
512 | struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); | |
513 | struct usb_host_interface *intf_desc = intf->cur_altsetting; | |
514 | struct usb_endpoint_descriptor *ep_desc; | |
515 | struct data_queue *queue = rt2x00dev->tx; | |
516 | struct usb_endpoint_descriptor *tx_ep_desc = NULL; | |
517 | unsigned int i; | |
518 | ||
519 | /* | |
520 | * Walk through all available endpoints to search for "bulk in" | |
521 | * and "bulk out" endpoints. When we find such endpoints collect | |
522 | * the information we need from the descriptor and assign it | |
523 | * to the queue. | |
524 | */ | |
525 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
526 | ep_desc = &intf_desc->endpoint[i].desc; | |
527 | ||
528 | if (usb_endpoint_is_bulk_in(ep_desc)) { | |
529 | rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); | |
d15cfc3a ID |
530 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
531 | (queue != queue_end(rt2x00dev))) { | |
f1ca2167 | 532 | rt2x00usb_assign_endpoint(queue, ep_desc); |
d15cfc3a | 533 | queue = queue_next(queue); |
f1ca2167 | 534 | |
f1ca2167 ID |
535 | tx_ep_desc = ep_desc; |
536 | } | |
537 | } | |
538 | ||
539 | /* | |
540 | * At least 1 endpoint for RX and 1 endpoint for TX must be available. | |
541 | */ | |
542 | if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { | |
543 | ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); | |
544 | return -EPIPE; | |
545 | } | |
546 | ||
547 | /* | |
548 | * It might be possible not all queues have a dedicated endpoint. | |
549 | * Loop through all TX queues and copy the endpoint information | |
550 | * which we have gathered from already assigned endpoints. | |
551 | */ | |
552 | txall_queue_for_each(rt2x00dev, queue) { | |
553 | if (!queue->usb_endpoint) | |
554 | rt2x00usb_assign_endpoint(queue, tx_ep_desc); | |
555 | } | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
fa69560f | 560 | static int rt2x00usb_alloc_entries(struct data_queue *queue) |
95ea3627 | 561 | { |
fa69560f | 562 | struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
b8be63ff ID |
563 | struct queue_entry_priv_usb *entry_priv; |
564 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
565 | unsigned int i; |
566 | ||
b8be63ff ID |
567 | for (i = 0; i < queue->limit; i++) { |
568 | entry_priv = queue->entries[i].priv_data; | |
569 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
570 | if (!entry_priv->urb) | |
571 | return -ENOMEM; | |
572 | } | |
573 | ||
95ea3627 | 574 | /* |
b8be63ff ID |
575 | * If this is not the beacon queue or |
576 | * no guardian byte was required for the beacon, | |
577 | * then we are done. | |
95ea3627 | 578 | */ |
fa69560f | 579 | if (queue->qid != QID_BEACON || |
b8be63ff ID |
580 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) |
581 | return 0; | |
582 | ||
181d6902 | 583 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
584 | bcn_priv = queue->entries[i].priv_data; |
585 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
586 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
587 | return -ENOMEM; |
588 | } | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
fa69560f | 593 | static void rt2x00usb_free_entries(struct data_queue *queue) |
95ea3627 | 594 | { |
fa69560f | 595 | struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
b8be63ff ID |
596 | struct queue_entry_priv_usb *entry_priv; |
597 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
598 | unsigned int i; |
599 | ||
181d6902 | 600 | if (!queue->entries) |
95ea3627 ID |
601 | return; |
602 | ||
181d6902 | 603 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
604 | entry_priv = queue->entries[i].priv_data; |
605 | usb_kill_urb(entry_priv->urb); | |
606 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 607 | } |
b8be63ff ID |
608 | |
609 | /* | |
610 | * If this is not the beacon queue or | |
611 | * no guardian byte was required for the beacon, | |
612 | * then we are done. | |
613 | */ | |
fa69560f | 614 | if (queue->qid != QID_BEACON || |
b8be63ff ID |
615 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) |
616 | return; | |
617 | ||
618 | for (i = 0; i < queue->limit; i++) { | |
619 | bcn_priv = queue->entries[i].priv_data; | |
620 | usb_kill_urb(bcn_priv->guardian_urb); | |
621 | usb_free_urb(bcn_priv->guardian_urb); | |
622 | } | |
95ea3627 ID |
623 | } |
624 | ||
625 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
626 | { | |
181d6902 | 627 | struct data_queue *queue; |
30caa6e3 | 628 | int status; |
95ea3627 | 629 | |
f1ca2167 ID |
630 | /* |
631 | * Find endpoints for each queue | |
632 | */ | |
633 | status = rt2x00usb_find_endpoints(rt2x00dev); | |
634 | if (status) | |
635 | goto exit; | |
636 | ||
95ea3627 ID |
637 | /* |
638 | * Allocate DMA | |
639 | */ | |
181d6902 | 640 | queue_for_each(rt2x00dev, queue) { |
fa69560f | 641 | status = rt2x00usb_alloc_entries(queue); |
95ea3627 ID |
642 | if (status) |
643 | goto exit; | |
644 | } | |
645 | ||
95ea3627 ID |
646 | return 0; |
647 | ||
648 | exit: | |
649 | rt2x00usb_uninitialize(rt2x00dev); | |
650 | ||
651 | return status; | |
652 | } | |
653 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
654 | ||
655 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
656 | { | |
181d6902 | 657 | struct data_queue *queue; |
95ea3627 | 658 | |
181d6902 | 659 | queue_for_each(rt2x00dev, queue) |
fa69560f | 660 | rt2x00usb_free_entries(queue); |
95ea3627 ID |
661 | } |
662 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
663 | ||
664 | /* | |
665 | * USB driver handlers. | |
666 | */ | |
667 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
668 | { | |
669 | kfree(rt2x00dev->rf); | |
670 | rt2x00dev->rf = NULL; | |
671 | ||
672 | kfree(rt2x00dev->eeprom); | |
673 | rt2x00dev->eeprom = NULL; | |
674 | ||
21795094 ID |
675 | kfree(rt2x00dev->csr.cache); |
676 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
677 | } |
678 | ||
679 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
680 | { | |
21795094 ID |
681 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
682 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
683 | goto exit; |
684 | ||
685 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
686 | if (!rt2x00dev->eeprom) | |
687 | goto exit; | |
688 | ||
689 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
690 | if (!rt2x00dev->rf) | |
691 | goto exit; | |
692 | ||
693 | return 0; | |
694 | ||
695 | exit: | |
696 | ERROR_PROBE("Failed to allocate registers.\n"); | |
697 | ||
698 | rt2x00usb_free_reg(rt2x00dev); | |
699 | ||
700 | return -ENOMEM; | |
701 | } | |
702 | ||
703 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
704 | const struct usb_device_id *id) | |
705 | { | |
706 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
707 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; | |
708 | struct ieee80211_hw *hw; | |
709 | struct rt2x00_dev *rt2x00dev; | |
710 | int retval; | |
711 | ||
712 | usb_dev = usb_get_dev(usb_dev); | |
713 | ||
714 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
715 | if (!hw) { | |
716 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
717 | retval = -ENOMEM; | |
718 | goto exit_put_device; | |
719 | } | |
720 | ||
721 | usb_set_intfdata(usb_intf, hw); | |
722 | ||
723 | rt2x00dev = hw->priv; | |
14a3bf89 | 724 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
725 | rt2x00dev->ops = ops; |
726 | rt2x00dev->hw = hw; | |
727 | ||
2015d192 GW |
728 | rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); |
729 | ||
7e613e16 ID |
730 | INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone); |
731 | INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone); | |
732 | ||
95ea3627 ID |
733 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
734 | if (retval) | |
735 | goto exit_free_device; | |
736 | ||
737 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
738 | if (retval) | |
739 | goto exit_free_reg; | |
740 | ||
741 | return 0; | |
742 | ||
743 | exit_free_reg: | |
744 | rt2x00usb_free_reg(rt2x00dev); | |
745 | ||
746 | exit_free_device: | |
747 | ieee80211_free_hw(hw); | |
748 | ||
749 | exit_put_device: | |
750 | usb_put_dev(usb_dev); | |
751 | ||
752 | usb_set_intfdata(usb_intf, NULL); | |
753 | ||
754 | return retval; | |
755 | } | |
756 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
757 | ||
758 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
759 | { | |
760 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
761 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
762 | ||
763 | /* | |
764 | * Free all allocated data. | |
765 | */ | |
766 | rt2x00lib_remove_dev(rt2x00dev); | |
767 | rt2x00usb_free_reg(rt2x00dev); | |
768 | ieee80211_free_hw(hw); | |
769 | ||
770 | /* | |
771 | * Free the USB device data. | |
772 | */ | |
773 | usb_set_intfdata(usb_intf, NULL); | |
774 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
775 | } | |
776 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
777 | ||
778 | #ifdef CONFIG_PM | |
779 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
780 | { | |
781 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
782 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
783 | int retval; | |
784 | ||
785 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
786 | if (retval) | |
787 | return retval; | |
788 | ||
95ea3627 ID |
789 | /* |
790 | * Decrease usbdev refcount. | |
791 | */ | |
792 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
793 | ||
794 | return 0; | |
795 | } | |
796 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
797 | ||
798 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
799 | { | |
800 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
801 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 ID |
802 | |
803 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
804 | ||
499a214c | 805 | return rt2x00lib_resume(rt2x00dev); |
95ea3627 ID |
806 | } |
807 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
808 | #endif /* CONFIG_PM */ | |
809 | ||
810 | /* | |
181d6902 | 811 | * rt2x00usb module information. |
95ea3627 ID |
812 | */ |
813 | MODULE_AUTHOR(DRV_PROJECT); | |
814 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 815 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 816 | MODULE_LICENSE("GPL"); |