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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 | ||
211 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || | |
212 | !__test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) | |
213 | return; | |
214 | ||
215 | /* | |
216 | * Check if the frame was correctly uploaded | |
217 | */ | |
218 | if (urb->status) | |
219 | __set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
220 | ||
221 | /* | |
222 | * Schedule the delayed work for reading the TX status | |
223 | * from the device. | |
224 | */ | |
225 | ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->txdone_work); | |
226 | } | |
227 | ||
f019d514 ID |
228 | static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry) |
229 | { | |
fe725697 GW |
230 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
231 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
f019d514 | 232 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
fe725697 GW |
233 | u32 length; |
234 | ||
235 | if (test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) { | |
236 | /* | |
237 | * USB devices cannot blindly pass the skb->len as the | |
238 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
239 | * to the driver to determine what the length should be. | |
240 | */ | |
241 | length = rt2x00dev->ops->lib->get_tx_data_len(entry); | |
242 | ||
243 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, | |
244 | usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
245 | entry->skb->data, length, | |
246 | rt2x00usb_interrupt_txdone, entry); | |
f019d514 | 247 | |
f019d514 | 248 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
fe725697 | 249 | } |
f019d514 ID |
250 | } |
251 | ||
252 | void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, | |
253 | const enum data_queue_qid qid) | |
254 | { | |
255 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
256 | unsigned long irqflags; | |
257 | unsigned int index; | |
258 | unsigned int index_done; | |
259 | unsigned int i; | |
260 | ||
261 | /* | |
262 | * Only protect the range we are going to loop over, | |
263 | * if during our loop a extra entry is set to pending | |
264 | * it should not be kicked during this run, since it | |
265 | * is part of another TX operation. | |
266 | */ | |
267 | spin_lock_irqsave(&queue->lock, irqflags); | |
268 | index = queue->index[Q_INDEX]; | |
269 | index_done = queue->index[Q_INDEX_DONE]; | |
270 | spin_unlock_irqrestore(&queue->lock, irqflags); | |
271 | ||
272 | /* | |
273 | * Start from the TX done pointer, this guarentees that we will | |
274 | * send out all frames in the correct order. | |
275 | */ | |
276 | if (index_done < index) { | |
277 | for (i = index_done; i < index; i++) | |
278 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
279 | } else { | |
280 | for (i = index_done; i < queue->limit; i++) | |
281 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
282 | ||
283 | for (i = 0; i < index; i++) | |
284 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
285 | } | |
286 | } | |
287 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue); | |
288 | ||
a2c9b652 ID |
289 | void rt2x00usb_kill_tx_queue(struct rt2x00_dev *rt2x00dev, |
290 | const enum data_queue_qid qid) | |
291 | { | |
292 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
293 | struct queue_entry_priv_usb *entry_priv; | |
294 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
295 | unsigned int i; | |
296 | bool kill_guard; | |
297 | ||
298 | /* | |
299 | * When killing the beacon queue, we must also kill | |
300 | * the beacon guard byte. | |
301 | */ | |
302 | kill_guard = | |
303 | (qid == QID_BEACON) && | |
304 | (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)); | |
305 | ||
306 | /* | |
307 | * Cancel all entries. | |
308 | */ | |
309 | for (i = 0; i < queue->limit; i++) { | |
310 | entry_priv = queue->entries[i].priv_data; | |
311 | usb_kill_urb(entry_priv->urb); | |
312 | ||
313 | /* | |
314 | * Kill guardian urb (if required by driver). | |
315 | */ | |
316 | if (kill_guard) { | |
317 | bcn_priv = queue->entries[i].priv_data; | |
318 | usb_kill_urb(bcn_priv->guardian_urb); | |
319 | } | |
320 | } | |
321 | } | |
322 | EXPORT_SYMBOL_GPL(rt2x00usb_kill_tx_queue); | |
323 | ||
c965c74b ID |
324 | static void rt2x00usb_watchdog_reset_tx(struct data_queue *queue) |
325 | { | |
7e613e16 | 326 | struct queue_entry *entry; |
c965c74b ID |
327 | struct queue_entry_priv_usb *entry_priv; |
328 | unsigned short threshold = queue->threshold; | |
329 | ||
330 | WARNING(queue->rt2x00dev, "TX queue %d timed out, invoke reset", queue->qid); | |
331 | ||
332 | /* | |
333 | * Temporarily disable the TX queue, this will force mac80211 | |
334 | * to use the other queues until this queue has been restored. | |
335 | * | |
336 | * Set the queue threshold to the queue limit. This prevents the | |
337 | * queue from being enabled during the txdone handler. | |
338 | */ | |
339 | queue->threshold = queue->limit; | |
340 | ieee80211_stop_queue(queue->rt2x00dev->hw, queue->qid); | |
341 | ||
342 | /* | |
343 | * Reset all currently uploaded TX frames. | |
344 | */ | |
345 | while (!rt2x00queue_empty(queue)) { | |
7e613e16 ID |
346 | entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE); |
347 | entry_priv = entry->priv_data; | |
c965c74b ID |
348 | usb_kill_urb(entry_priv->urb); |
349 | ||
350 | /* | |
351 | * We need a short delay here to wait for | |
7e613e16 | 352 | * the URB to be canceled |
c965c74b | 353 | */ |
7e613e16 ID |
354 | do { |
355 | udelay(100); | |
356 | } while (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)); | |
357 | ||
358 | /* | |
359 | * Invoke the TX done handler | |
360 | */ | |
361 | rt2x00usb_work_txdone_entry(entry); | |
c965c74b ID |
362 | } |
363 | ||
364 | /* | |
365 | * The queue has been reset, and mac80211 is allowed to use the | |
366 | * queue again. | |
367 | */ | |
368 | queue->threshold = threshold; | |
369 | ieee80211_wake_queue(queue->rt2x00dev->hw, queue->qid); | |
370 | } | |
371 | ||
372 | void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev) | |
373 | { | |
374 | struct data_queue *queue; | |
375 | ||
376 | tx_queue_for_each(rt2x00dev, queue) { | |
377 | if (rt2x00queue_timeout(queue)) | |
378 | rt2x00usb_watchdog_reset_tx(queue); | |
379 | } | |
380 | } | |
381 | EXPORT_SYMBOL_GPL(rt2x00usb_watchdog); | |
382 | ||
95ea3627 ID |
383 | /* |
384 | * RX data handlers. | |
385 | */ | |
7e613e16 ID |
386 | static void rt2x00usb_work_rxdone(struct work_struct *work) |
387 | { | |
388 | struct rt2x00_dev *rt2x00dev = | |
389 | container_of(work, struct rt2x00_dev, rxdone_work); | |
390 | struct queue_entry *entry; | |
391 | struct skb_frame_desc *skbdesc; | |
392 | u8 rxd[32]; | |
393 | ||
394 | while (!rt2x00queue_empty(rt2x00dev->rx)) { | |
395 | entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE); | |
396 | ||
397 | if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) | |
398 | break; | |
399 | ||
400 | /* | |
401 | * Fill in desc fields of the skb descriptor | |
402 | */ | |
403 | skbdesc = get_skb_frame_desc(entry->skb); | |
404 | skbdesc->desc = rxd; | |
405 | skbdesc->desc_len = entry->queue->desc_size; | |
406 | ||
407 | /* | |
408 | * Send the frame to rt2x00lib for further processing. | |
409 | */ | |
410 | rt2x00lib_rxdone(rt2x00dev, entry); | |
411 | } | |
412 | } | |
413 | ||
95ea3627 ID |
414 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) |
415 | { | |
181d6902 ID |
416 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
417 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
95ea3627 | 418 | |
0262ab0d | 419 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
7e613e16 | 420 | !__test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
421 | return; |
422 | ||
423 | /* | |
424 | * Check if the received data is simply too small | |
425 | * to be actually valid, or if the urb is signaling | |
426 | * a problem. | |
427 | */ | |
7e613e16 ID |
428 | if (urb->actual_length < entry->queue->desc_size || urb->status) |
429 | __set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
40561b84 | 430 | |
95ea3627 | 431 | /* |
7e613e16 ID |
432 | * Schedule the delayed work for reading the RX status |
433 | * from the device. | |
95ea3627 | 434 | */ |
7e613e16 | 435 | ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->rxdone_work); |
95ea3627 ID |
436 | } |
437 | ||
438 | /* | |
439 | * Radio handlers | |
440 | */ | |
95ea3627 ID |
441 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
442 | { | |
bd394a74 | 443 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 ID |
444 | REGISTER_TIMEOUT); |
445 | ||
446 | /* | |
a2c9b652 ID |
447 | * The USB version of kill_tx_queue also works |
448 | * on the RX queue. | |
b8be63ff | 449 | */ |
a2c9b652 | 450 | rt2x00dev->ops->lib->kill_tx_queue(rt2x00dev, QID_RX); |
95ea3627 ID |
451 | } |
452 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
453 | ||
454 | /* | |
455 | * Device initialization handlers. | |
456 | */ | |
798b7adb | 457 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 458 | { |
798b7adb ID |
459 | struct usb_device *usb_dev = |
460 | to_usb_device_intf(entry->queue->rt2x00dev->dev); | |
b8be63ff | 461 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
f1ca2167 | 462 | int pipe; |
837e7f24 | 463 | |
7e613e16 ID |
464 | entry->flags = 0; |
465 | ||
798b7adb | 466 | if (entry->queue->qid == QID_RX) { |
f1ca2167 ID |
467 | pipe = usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint); |
468 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, pipe, | |
798b7adb ID |
469 | entry->skb->data, entry->skb->len, |
470 | rt2x00usb_interrupt_rxdone, entry); | |
837e7f24 | 471 | |
798b7adb ID |
472 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
473 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
798b7adb | 474 | } |
837e7f24 | 475 | } |
798b7adb | 476 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 477 | |
f1ca2167 ID |
478 | static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
479 | struct usb_endpoint_descriptor *ep_desc) | |
480 | { | |
481 | struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); | |
482 | int pipe; | |
483 | ||
484 | queue->usb_endpoint = usb_endpoint_num(ep_desc); | |
485 | ||
486 | if (queue->qid == QID_RX) { | |
487 | pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); | |
488 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); | |
489 | } else { | |
490 | pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); | |
491 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); | |
492 | } | |
493 | ||
494 | if (!queue->usb_maxpacket) | |
495 | queue->usb_maxpacket = 1; | |
496 | } | |
497 | ||
498 | static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) | |
499 | { | |
500 | struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); | |
501 | struct usb_host_interface *intf_desc = intf->cur_altsetting; | |
502 | struct usb_endpoint_descriptor *ep_desc; | |
503 | struct data_queue *queue = rt2x00dev->tx; | |
504 | struct usb_endpoint_descriptor *tx_ep_desc = NULL; | |
505 | unsigned int i; | |
506 | ||
507 | /* | |
508 | * Walk through all available endpoints to search for "bulk in" | |
509 | * and "bulk out" endpoints. When we find such endpoints collect | |
510 | * the information we need from the descriptor and assign it | |
511 | * to the queue. | |
512 | */ | |
513 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
514 | ep_desc = &intf_desc->endpoint[i].desc; | |
515 | ||
516 | if (usb_endpoint_is_bulk_in(ep_desc)) { | |
517 | rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); | |
d15cfc3a ID |
518 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
519 | (queue != queue_end(rt2x00dev))) { | |
f1ca2167 | 520 | rt2x00usb_assign_endpoint(queue, ep_desc); |
d15cfc3a | 521 | queue = queue_next(queue); |
f1ca2167 | 522 | |
f1ca2167 ID |
523 | tx_ep_desc = ep_desc; |
524 | } | |
525 | } | |
526 | ||
527 | /* | |
528 | * At least 1 endpoint for RX and 1 endpoint for TX must be available. | |
529 | */ | |
530 | if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { | |
531 | ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); | |
532 | return -EPIPE; | |
533 | } | |
534 | ||
535 | /* | |
536 | * It might be possible not all queues have a dedicated endpoint. | |
537 | * Loop through all TX queues and copy the endpoint information | |
538 | * which we have gathered from already assigned endpoints. | |
539 | */ | |
540 | txall_queue_for_each(rt2x00dev, queue) { | |
541 | if (!queue->usb_endpoint) | |
542 | rt2x00usb_assign_endpoint(queue, tx_ep_desc); | |
543 | } | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
95ea3627 | 548 | static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, |
181d6902 | 549 | struct data_queue *queue) |
95ea3627 | 550 | { |
b8be63ff ID |
551 | struct queue_entry_priv_usb *entry_priv; |
552 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
553 | unsigned int i; |
554 | ||
b8be63ff ID |
555 | for (i = 0; i < queue->limit; i++) { |
556 | entry_priv = queue->entries[i].priv_data; | |
557 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
558 | if (!entry_priv->urb) | |
559 | return -ENOMEM; | |
560 | } | |
561 | ||
95ea3627 | 562 | /* |
b8be63ff ID |
563 | * If this is not the beacon queue or |
564 | * no guardian byte was required for the beacon, | |
565 | * then we are done. | |
95ea3627 | 566 | */ |
b8be63ff ID |
567 | if (rt2x00dev->bcn != queue || |
568 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
569 | return 0; | |
570 | ||
181d6902 | 571 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
572 | bcn_priv = queue->entries[i].priv_data; |
573 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
574 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
575 | return -ENOMEM; |
576 | } | |
577 | ||
578 | return 0; | |
579 | } | |
580 | ||
581 | static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 582 | struct data_queue *queue) |
95ea3627 | 583 | { |
b8be63ff ID |
584 | struct queue_entry_priv_usb *entry_priv; |
585 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
586 | unsigned int i; |
587 | ||
181d6902 | 588 | if (!queue->entries) |
95ea3627 ID |
589 | return; |
590 | ||
181d6902 | 591 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
592 | entry_priv = queue->entries[i].priv_data; |
593 | usb_kill_urb(entry_priv->urb); | |
594 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 595 | } |
b8be63ff ID |
596 | |
597 | /* | |
598 | * If this is not the beacon queue or | |
599 | * no guardian byte was required for the beacon, | |
600 | * then we are done. | |
601 | */ | |
602 | if (rt2x00dev->bcn != queue || | |
603 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
604 | return; | |
605 | ||
606 | for (i = 0; i < queue->limit; i++) { | |
607 | bcn_priv = queue->entries[i].priv_data; | |
608 | usb_kill_urb(bcn_priv->guardian_urb); | |
609 | usb_free_urb(bcn_priv->guardian_urb); | |
610 | } | |
95ea3627 ID |
611 | } |
612 | ||
613 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
614 | { | |
181d6902 | 615 | struct data_queue *queue; |
30caa6e3 | 616 | int status; |
95ea3627 | 617 | |
f1ca2167 ID |
618 | /* |
619 | * Find endpoints for each queue | |
620 | */ | |
621 | status = rt2x00usb_find_endpoints(rt2x00dev); | |
622 | if (status) | |
623 | goto exit; | |
624 | ||
95ea3627 ID |
625 | /* |
626 | * Allocate DMA | |
627 | */ | |
181d6902 ID |
628 | queue_for_each(rt2x00dev, queue) { |
629 | status = rt2x00usb_alloc_urb(rt2x00dev, queue); | |
95ea3627 ID |
630 | if (status) |
631 | goto exit; | |
632 | } | |
633 | ||
95ea3627 ID |
634 | return 0; |
635 | ||
636 | exit: | |
637 | rt2x00usb_uninitialize(rt2x00dev); | |
638 | ||
639 | return status; | |
640 | } | |
641 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
642 | ||
643 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
644 | { | |
181d6902 | 645 | struct data_queue *queue; |
95ea3627 | 646 | |
181d6902 ID |
647 | queue_for_each(rt2x00dev, queue) |
648 | rt2x00usb_free_urb(rt2x00dev, queue); | |
95ea3627 ID |
649 | } |
650 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
651 | ||
652 | /* | |
653 | * USB driver handlers. | |
654 | */ | |
655 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
656 | { | |
657 | kfree(rt2x00dev->rf); | |
658 | rt2x00dev->rf = NULL; | |
659 | ||
660 | kfree(rt2x00dev->eeprom); | |
661 | rt2x00dev->eeprom = NULL; | |
662 | ||
21795094 ID |
663 | kfree(rt2x00dev->csr.cache); |
664 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
665 | } |
666 | ||
667 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
668 | { | |
21795094 ID |
669 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
670 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
671 | goto exit; |
672 | ||
673 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
674 | if (!rt2x00dev->eeprom) | |
675 | goto exit; | |
676 | ||
677 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
678 | if (!rt2x00dev->rf) | |
679 | goto exit; | |
680 | ||
681 | return 0; | |
682 | ||
683 | exit: | |
684 | ERROR_PROBE("Failed to allocate registers.\n"); | |
685 | ||
686 | rt2x00usb_free_reg(rt2x00dev); | |
687 | ||
688 | return -ENOMEM; | |
689 | } | |
690 | ||
691 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
692 | const struct usb_device_id *id) | |
693 | { | |
694 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
695 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; | |
696 | struct ieee80211_hw *hw; | |
697 | struct rt2x00_dev *rt2x00dev; | |
698 | int retval; | |
699 | ||
700 | usb_dev = usb_get_dev(usb_dev); | |
701 | ||
702 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
703 | if (!hw) { | |
704 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
705 | retval = -ENOMEM; | |
706 | goto exit_put_device; | |
707 | } | |
708 | ||
709 | usb_set_intfdata(usb_intf, hw); | |
710 | ||
711 | rt2x00dev = hw->priv; | |
14a3bf89 | 712 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
713 | rt2x00dev->ops = ops; |
714 | rt2x00dev->hw = hw; | |
715 | ||
2015d192 GW |
716 | rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); |
717 | ||
7e613e16 ID |
718 | INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone); |
719 | INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone); | |
720 | ||
95ea3627 ID |
721 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
722 | if (retval) | |
723 | goto exit_free_device; | |
724 | ||
725 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
726 | if (retval) | |
727 | goto exit_free_reg; | |
728 | ||
729 | return 0; | |
730 | ||
731 | exit_free_reg: | |
732 | rt2x00usb_free_reg(rt2x00dev); | |
733 | ||
734 | exit_free_device: | |
735 | ieee80211_free_hw(hw); | |
736 | ||
737 | exit_put_device: | |
738 | usb_put_dev(usb_dev); | |
739 | ||
740 | usb_set_intfdata(usb_intf, NULL); | |
741 | ||
742 | return retval; | |
743 | } | |
744 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
745 | ||
746 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
747 | { | |
748 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
749 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
750 | ||
751 | /* | |
752 | * Free all allocated data. | |
753 | */ | |
754 | rt2x00lib_remove_dev(rt2x00dev); | |
755 | rt2x00usb_free_reg(rt2x00dev); | |
756 | ieee80211_free_hw(hw); | |
757 | ||
758 | /* | |
759 | * Free the USB device data. | |
760 | */ | |
761 | usb_set_intfdata(usb_intf, NULL); | |
762 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
763 | } | |
764 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
765 | ||
766 | #ifdef CONFIG_PM | |
767 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
768 | { | |
769 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
770 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
771 | int retval; | |
772 | ||
773 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
774 | if (retval) | |
775 | return retval; | |
776 | ||
95ea3627 ID |
777 | /* |
778 | * Decrease usbdev refcount. | |
779 | */ | |
780 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
781 | ||
782 | return 0; | |
783 | } | |
784 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
785 | ||
786 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
787 | { | |
788 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
789 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 ID |
790 | |
791 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
792 | ||
499a214c | 793 | return rt2x00lib_resume(rt2x00dev); |
95ea3627 ID |
794 | } |
795 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
796 | #endif /* CONFIG_PM */ | |
797 | ||
798 | /* | |
181d6902 | 799 | * rt2x00usb module information. |
95ea3627 ID |
800 | */ |
801 | MODULE_AUTHOR(DRV_PROJECT); | |
802 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 803 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 804 | MODULE_LICENSE("GPL"); |