Commit | Line | Data |
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95ea3627 | 1 | /* |
4e54c711 | 2 | Copyright (C) 2004 - 2009 rt2x00 SourceForge Project |
95ea3627 ID |
3 | <http://rt2x00.serialmonkey.com> |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the | |
17 | Free Software Foundation, Inc., | |
18 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
21 | /* | |
22 | Module: rt2x00usb | |
23 | Abstract: rt2x00 generic usb device routines. | |
24 | */ | |
25 | ||
95ea3627 ID |
26 | #include <linux/kernel.h> |
27 | #include <linux/module.h> | |
28 | #include <linux/usb.h> | |
3d82346c | 29 | #include <linux/bug.h> |
95ea3627 ID |
30 | |
31 | #include "rt2x00.h" | |
32 | #include "rt2x00usb.h" | |
33 | ||
34 | /* | |
35 | * Interfacing with the HW. | |
36 | */ | |
0e14f6d3 | 37 | int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev, |
95ea3627 ID |
38 | const u8 request, const u8 requesttype, |
39 | const u16 offset, const u16 value, | |
40 | void *buffer, const u16 buffer_length, | |
e9136550 | 41 | const int timeout) |
95ea3627 | 42 | { |
c1d35dfa | 43 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
95ea3627 ID |
44 | int status; |
45 | unsigned int i; | |
46 | unsigned int pipe = | |
47 | (requesttype == USB_VENDOR_REQUEST_IN) ? | |
48 | usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0); | |
49 | ||
3d82346c | 50 | |
95ea3627 ID |
51 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
52 | status = usb_control_msg(usb_dev, pipe, request, requesttype, | |
53 | value, offset, buffer, buffer_length, | |
54 | timeout); | |
55 | if (status >= 0) | |
56 | return 0; | |
57 | ||
58 | /* | |
e9136550 | 59 | * Check for errors |
95ea3627 | 60 | * -ENODEV: Device has disappeared, no point continuing. |
e9136550 | 61 | * All other errors: Try again. |
95ea3627 | 62 | */ |
95ea3627 ID |
63 | else if (status == -ENODEV) |
64 | break; | |
65 | } | |
66 | ||
67 | ERROR(rt2x00dev, | |
68 | "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n", | |
69 | request, offset, status); | |
70 | ||
71 | return status; | |
72 | } | |
73 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request); | |
74 | ||
3d82346c AB |
75 | int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev, |
76 | const u8 request, const u8 requesttype, | |
77 | const u16 offset, void *buffer, | |
78 | const u16 buffer_length, const int timeout) | |
95ea3627 ID |
79 | { |
80 | int status; | |
81 | ||
8ff48a8b | 82 | BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex)); |
3d82346c | 83 | |
95ea3627 ID |
84 | /* |
85 | * Check for Cache availability. | |
86 | */ | |
21795094 | 87 | if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) { |
95ea3627 ID |
88 | ERROR(rt2x00dev, "CSR cache not available.\n"); |
89 | return -ENOMEM; | |
90 | } | |
91 | ||
92 | if (requesttype == USB_VENDOR_REQUEST_OUT) | |
21795094 | 93 | memcpy(rt2x00dev->csr.cache, buffer, buffer_length); |
95ea3627 ID |
94 | |
95 | status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype, | |
21795094 | 96 | offset, 0, rt2x00dev->csr.cache, |
95ea3627 ID |
97 | buffer_length, timeout); |
98 | ||
99 | if (!status && requesttype == USB_VENDOR_REQUEST_IN) | |
21795094 | 100 | memcpy(buffer, rt2x00dev->csr.cache, buffer_length); |
95ea3627 ID |
101 | |
102 | return status; | |
103 | } | |
3d82346c AB |
104 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock); |
105 | ||
106 | int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev, | |
107 | const u8 request, const u8 requesttype, | |
108 | const u16 offset, void *buffer, | |
109 | const u16 buffer_length, const int timeout) | |
110 | { | |
111 | int status; | |
112 | ||
8ff48a8b | 113 | mutex_lock(&rt2x00dev->csr_mutex); |
3d82346c AB |
114 | |
115 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
116 | requesttype, offset, buffer, | |
117 | buffer_length, timeout); | |
118 | ||
8ff48a8b | 119 | mutex_unlock(&rt2x00dev->csr_mutex); |
3d82346c AB |
120 | |
121 | return status; | |
122 | } | |
95ea3627 ID |
123 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff); |
124 | ||
ed0dbeeb IM |
125 | int rt2x00usb_vendor_request_large_buff(struct rt2x00_dev *rt2x00dev, |
126 | const u8 request, const u8 requesttype, | |
82f97b8d | 127 | const u16 offset, const void *buffer, |
ed0dbeeb IM |
128 | const u16 buffer_length, |
129 | const int timeout) | |
130 | { | |
131 | int status = 0; | |
132 | unsigned char *tb; | |
133 | u16 off, len, bsize; | |
134 | ||
8ff48a8b | 135 | mutex_lock(&rt2x00dev->csr_mutex); |
ed0dbeeb | 136 | |
82f97b8d | 137 | tb = (char *)buffer; |
ed0dbeeb IM |
138 | off = offset; |
139 | len = buffer_length; | |
140 | while (len && !status) { | |
141 | bsize = min_t(u16, CSR_CACHE_SIZE, len); | |
142 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
143 | requesttype, off, tb, | |
144 | bsize, timeout); | |
145 | ||
146 | tb += bsize; | |
147 | len -= bsize; | |
148 | off += bsize; | |
149 | } | |
150 | ||
8ff48a8b | 151 | mutex_unlock(&rt2x00dev->csr_mutex); |
ed0dbeeb IM |
152 | |
153 | return status; | |
154 | } | |
155 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_large_buff); | |
156 | ||
0f829b1d ID |
157 | int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev, |
158 | const unsigned int offset, | |
159 | struct rt2x00_field32 field, | |
160 | u32 *reg) | |
161 | { | |
162 | unsigned int i; | |
163 | ||
164 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { | |
165 | rt2x00usb_register_read_lock(rt2x00dev, offset, reg); | |
166 | if (!rt2x00_get_field32(*reg, field)) | |
167 | return 1; | |
168 | udelay(REGISTER_BUSY_DELAY); | |
169 | } | |
170 | ||
171 | ERROR(rt2x00dev, "Indirect register access failed: " | |
172 | "offset=0x%.08x, value=0x%.08x\n", offset, *reg); | |
173 | *reg = ~0; | |
174 | ||
175 | return 0; | |
176 | } | |
177 | EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read); | |
178 | ||
95ea3627 ID |
179 | /* |
180 | * TX data handlers. | |
181 | */ | |
182 | static void rt2x00usb_interrupt_txdone(struct urb *urb) | |
183 | { | |
181d6902 ID |
184 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
185 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
181d6902 | 186 | struct txdone_entry_desc txdesc; |
95ea3627 | 187 | |
0262ab0d | 188 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 189 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
190 | return; |
191 | ||
95ea3627 ID |
192 | /* |
193 | * Obtain the status about this packet. | |
fb55f4d1 ID |
194 | * Note that when the status is 0 it does not mean the |
195 | * frame was send out correctly. It only means the frame | |
196 | * was succesfully pushed to the hardware, we have no | |
197 | * way to determine the transmission status right now. | |
198 | * (Only indirectly by looking at the failed TX counters | |
199 | * in the register). | |
95ea3627 | 200 | */ |
f126cba4 | 201 | txdesc.flags = 0; |
fb55f4d1 ID |
202 | if (!urb->status) |
203 | __set_bit(TXDONE_UNKNOWN, &txdesc.flags); | |
204 | else | |
205 | __set_bit(TXDONE_FAILURE, &txdesc.flags); | |
181d6902 | 206 | txdesc.retry = 0; |
95ea3627 | 207 | |
181d6902 | 208 | rt2x00lib_txdone(entry, &txdesc); |
95ea3627 ID |
209 | } |
210 | ||
6db3786a | 211 | int rt2x00usb_write_tx_data(struct queue_entry *entry) |
95ea3627 | 212 | { |
6db3786a | 213 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
c1d35dfa | 214 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
b8be63ff | 215 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
181d6902 | 216 | struct skb_frame_desc *skbdesc; |
dd9fa2d2 | 217 | u32 length; |
95ea3627 | 218 | |
95ea3627 ID |
219 | /* |
220 | * Add the descriptor in front of the skb. | |
221 | */ | |
6db3786a ID |
222 | skb_push(entry->skb, entry->queue->desc_size); |
223 | memset(entry->skb->data, 0, entry->queue->desc_size); | |
95ea3627 | 224 | |
08992f7f ID |
225 | /* |
226 | * Fill in skb descriptor | |
227 | */ | |
6db3786a | 228 | skbdesc = get_skb_frame_desc(entry->skb); |
6db3786a ID |
229 | skbdesc->desc = entry->skb->data; |
230 | skbdesc->desc_len = entry->queue->desc_size; | |
08992f7f | 231 | |
95ea3627 | 232 | /* |
dd9fa2d2 ID |
233 | * USB devices cannot blindly pass the skb->len as the |
234 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
235 | * to the driver to determine what the length should be. | |
95ea3627 | 236 | */ |
f1ca2167 | 237 | length = rt2x00dev->ops->lib->get_tx_data_len(entry); |
95ea3627 | 238 | |
6db3786a | 239 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
f1ca2167 | 240 | usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), |
6db3786a ID |
241 | entry->skb->data, length, |
242 | rt2x00usb_interrupt_txdone, entry); | |
95ea3627 | 243 | |
1abc3656 MN |
244 | /* |
245 | * Make sure the skb->data pointer points to the frame, not the | |
246 | * descriptor. | |
247 | */ | |
248 | skb_pull(entry->skb, entry->queue->desc_size); | |
249 | ||
95ea3627 ID |
250 | return 0; |
251 | } | |
252 | EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data); | |
253 | ||
f019d514 ID |
254 | static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry) |
255 | { | |
256 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
257 | ||
0262ab0d | 258 | if (test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) |
f019d514 ID |
259 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
260 | } | |
261 | ||
262 | void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, | |
263 | const enum data_queue_qid qid) | |
264 | { | |
265 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
266 | unsigned long irqflags; | |
267 | unsigned int index; | |
268 | unsigned int index_done; | |
269 | unsigned int i; | |
270 | ||
271 | /* | |
272 | * Only protect the range we are going to loop over, | |
273 | * if during our loop a extra entry is set to pending | |
274 | * it should not be kicked during this run, since it | |
275 | * is part of another TX operation. | |
276 | */ | |
277 | spin_lock_irqsave(&queue->lock, irqflags); | |
278 | index = queue->index[Q_INDEX]; | |
279 | index_done = queue->index[Q_INDEX_DONE]; | |
280 | spin_unlock_irqrestore(&queue->lock, irqflags); | |
281 | ||
282 | /* | |
283 | * Start from the TX done pointer, this guarentees that we will | |
284 | * send out all frames in the correct order. | |
285 | */ | |
286 | if (index_done < index) { | |
287 | for (i = index_done; i < index; i++) | |
288 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
289 | } else { | |
290 | for (i = index_done; i < queue->limit; i++) | |
291 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
292 | ||
293 | for (i = 0; i < index; i++) | |
294 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
295 | } | |
296 | } | |
297 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue); | |
298 | ||
a2c9b652 ID |
299 | void rt2x00usb_kill_tx_queue(struct rt2x00_dev *rt2x00dev, |
300 | const enum data_queue_qid qid) | |
301 | { | |
302 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
303 | struct queue_entry_priv_usb *entry_priv; | |
304 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
305 | unsigned int i; | |
306 | bool kill_guard; | |
307 | ||
308 | /* | |
309 | * When killing the beacon queue, we must also kill | |
310 | * the beacon guard byte. | |
311 | */ | |
312 | kill_guard = | |
313 | (qid == QID_BEACON) && | |
314 | (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)); | |
315 | ||
316 | /* | |
317 | * Cancel all entries. | |
318 | */ | |
319 | for (i = 0; i < queue->limit; i++) { | |
320 | entry_priv = queue->entries[i].priv_data; | |
321 | usb_kill_urb(entry_priv->urb); | |
322 | ||
323 | /* | |
324 | * Kill guardian urb (if required by driver). | |
325 | */ | |
326 | if (kill_guard) { | |
327 | bcn_priv = queue->entries[i].priv_data; | |
328 | usb_kill_urb(bcn_priv->guardian_urb); | |
329 | } | |
330 | } | |
331 | } | |
332 | EXPORT_SYMBOL_GPL(rt2x00usb_kill_tx_queue); | |
333 | ||
95ea3627 ID |
334 | /* |
335 | * RX data handlers. | |
336 | */ | |
337 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
338 | { | |
181d6902 ID |
339 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
340 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
c4da0048 | 341 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
a26cbc65 | 342 | u8 rxd[32]; |
95ea3627 | 343 | |
0262ab0d | 344 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 345 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
346 | return; |
347 | ||
348 | /* | |
349 | * Check if the received data is simply too small | |
350 | * to be actually valid, or if the urb is signaling | |
351 | * a problem. | |
352 | */ | |
d74f5ba4 | 353 | if (urb->actual_length < entry->queue->desc_size || urb->status) { |
0262ab0d | 354 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
d74f5ba4 ID |
355 | usb_submit_urb(urb, GFP_ATOMIC); |
356 | return; | |
357 | } | |
95ea3627 | 358 | |
40561b84 | 359 | /* |
c4da0048 | 360 | * Fill in desc fields of the skb descriptor |
40561b84 | 361 | */ |
a26cbc65 GW |
362 | skbdesc->desc = rxd; |
363 | skbdesc->desc_len = entry->queue->desc_size; | |
40561b84 | 364 | |
95ea3627 ID |
365 | /* |
366 | * Send the frame to rt2x00lib for further processing. | |
367 | */ | |
c4da0048 | 368 | rt2x00lib_rxdone(rt2x00dev, entry); |
95ea3627 ID |
369 | } |
370 | ||
371 | /* | |
372 | * Radio handlers | |
373 | */ | |
95ea3627 ID |
374 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
375 | { | |
bd394a74 | 376 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 ID |
377 | REGISTER_TIMEOUT); |
378 | ||
379 | /* | |
a2c9b652 ID |
380 | * The USB version of kill_tx_queue also works |
381 | * on the RX queue. | |
b8be63ff | 382 | */ |
a2c9b652 | 383 | rt2x00dev->ops->lib->kill_tx_queue(rt2x00dev, QID_RX); |
95ea3627 ID |
384 | } |
385 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
386 | ||
387 | /* | |
388 | * Device initialization handlers. | |
389 | */ | |
798b7adb | 390 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 391 | { |
798b7adb ID |
392 | struct usb_device *usb_dev = |
393 | to_usb_device_intf(entry->queue->rt2x00dev->dev); | |
b8be63ff | 394 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
f1ca2167 | 395 | int pipe; |
837e7f24 | 396 | |
798b7adb | 397 | if (entry->queue->qid == QID_RX) { |
f1ca2167 ID |
398 | pipe = usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint); |
399 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, pipe, | |
798b7adb ID |
400 | entry->skb->data, entry->skb->len, |
401 | rt2x00usb_interrupt_rxdone, entry); | |
837e7f24 | 402 | |
798b7adb ID |
403 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
404 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
405 | } else { | |
406 | entry->flags = 0; | |
407 | } | |
837e7f24 | 408 | } |
798b7adb | 409 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 410 | |
f1ca2167 ID |
411 | static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
412 | struct usb_endpoint_descriptor *ep_desc) | |
413 | { | |
414 | struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); | |
415 | int pipe; | |
416 | ||
417 | queue->usb_endpoint = usb_endpoint_num(ep_desc); | |
418 | ||
419 | if (queue->qid == QID_RX) { | |
420 | pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); | |
421 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); | |
422 | } else { | |
423 | pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); | |
424 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); | |
425 | } | |
426 | ||
427 | if (!queue->usb_maxpacket) | |
428 | queue->usb_maxpacket = 1; | |
429 | } | |
430 | ||
431 | static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) | |
432 | { | |
433 | struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); | |
434 | struct usb_host_interface *intf_desc = intf->cur_altsetting; | |
435 | struct usb_endpoint_descriptor *ep_desc; | |
436 | struct data_queue *queue = rt2x00dev->tx; | |
437 | struct usb_endpoint_descriptor *tx_ep_desc = NULL; | |
438 | unsigned int i; | |
439 | ||
440 | /* | |
441 | * Walk through all available endpoints to search for "bulk in" | |
442 | * and "bulk out" endpoints. When we find such endpoints collect | |
443 | * the information we need from the descriptor and assign it | |
444 | * to the queue. | |
445 | */ | |
446 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
447 | ep_desc = &intf_desc->endpoint[i].desc; | |
448 | ||
449 | if (usb_endpoint_is_bulk_in(ep_desc)) { | |
450 | rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); | |
d15cfc3a ID |
451 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
452 | (queue != queue_end(rt2x00dev))) { | |
f1ca2167 | 453 | rt2x00usb_assign_endpoint(queue, ep_desc); |
d15cfc3a | 454 | queue = queue_next(queue); |
f1ca2167 | 455 | |
f1ca2167 ID |
456 | tx_ep_desc = ep_desc; |
457 | } | |
458 | } | |
459 | ||
460 | /* | |
461 | * At least 1 endpoint for RX and 1 endpoint for TX must be available. | |
462 | */ | |
463 | if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { | |
464 | ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); | |
465 | return -EPIPE; | |
466 | } | |
467 | ||
468 | /* | |
469 | * It might be possible not all queues have a dedicated endpoint. | |
470 | * Loop through all TX queues and copy the endpoint information | |
471 | * which we have gathered from already assigned endpoints. | |
472 | */ | |
473 | txall_queue_for_each(rt2x00dev, queue) { | |
474 | if (!queue->usb_endpoint) | |
475 | rt2x00usb_assign_endpoint(queue, tx_ep_desc); | |
476 | } | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
95ea3627 | 481 | static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, |
181d6902 | 482 | struct data_queue *queue) |
95ea3627 | 483 | { |
b8be63ff ID |
484 | struct queue_entry_priv_usb *entry_priv; |
485 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
486 | unsigned int i; |
487 | ||
b8be63ff ID |
488 | for (i = 0; i < queue->limit; i++) { |
489 | entry_priv = queue->entries[i].priv_data; | |
490 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
491 | if (!entry_priv->urb) | |
492 | return -ENOMEM; | |
493 | } | |
494 | ||
95ea3627 | 495 | /* |
b8be63ff ID |
496 | * If this is not the beacon queue or |
497 | * no guardian byte was required for the beacon, | |
498 | * then we are done. | |
95ea3627 | 499 | */ |
b8be63ff ID |
500 | if (rt2x00dev->bcn != queue || |
501 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
502 | return 0; | |
503 | ||
181d6902 | 504 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
505 | bcn_priv = queue->entries[i].priv_data; |
506 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
507 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
508 | return -ENOMEM; |
509 | } | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
514 | static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 515 | struct data_queue *queue) |
95ea3627 | 516 | { |
b8be63ff ID |
517 | struct queue_entry_priv_usb *entry_priv; |
518 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
519 | unsigned int i; |
520 | ||
181d6902 | 521 | if (!queue->entries) |
95ea3627 ID |
522 | return; |
523 | ||
181d6902 | 524 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
525 | entry_priv = queue->entries[i].priv_data; |
526 | usb_kill_urb(entry_priv->urb); | |
527 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 528 | } |
b8be63ff ID |
529 | |
530 | /* | |
531 | * If this is not the beacon queue or | |
532 | * no guardian byte was required for the beacon, | |
533 | * then we are done. | |
534 | */ | |
535 | if (rt2x00dev->bcn != queue || | |
536 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
537 | return; | |
538 | ||
539 | for (i = 0; i < queue->limit; i++) { | |
540 | bcn_priv = queue->entries[i].priv_data; | |
541 | usb_kill_urb(bcn_priv->guardian_urb); | |
542 | usb_free_urb(bcn_priv->guardian_urb); | |
543 | } | |
95ea3627 ID |
544 | } |
545 | ||
546 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
547 | { | |
181d6902 | 548 | struct data_queue *queue; |
30caa6e3 | 549 | int status; |
95ea3627 | 550 | |
f1ca2167 ID |
551 | /* |
552 | * Find endpoints for each queue | |
553 | */ | |
554 | status = rt2x00usb_find_endpoints(rt2x00dev); | |
555 | if (status) | |
556 | goto exit; | |
557 | ||
95ea3627 ID |
558 | /* |
559 | * Allocate DMA | |
560 | */ | |
181d6902 ID |
561 | queue_for_each(rt2x00dev, queue) { |
562 | status = rt2x00usb_alloc_urb(rt2x00dev, queue); | |
95ea3627 ID |
563 | if (status) |
564 | goto exit; | |
565 | } | |
566 | ||
95ea3627 ID |
567 | return 0; |
568 | ||
569 | exit: | |
570 | rt2x00usb_uninitialize(rt2x00dev); | |
571 | ||
572 | return status; | |
573 | } | |
574 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
575 | ||
576 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
577 | { | |
181d6902 | 578 | struct data_queue *queue; |
95ea3627 | 579 | |
181d6902 ID |
580 | queue_for_each(rt2x00dev, queue) |
581 | rt2x00usb_free_urb(rt2x00dev, queue); | |
95ea3627 ID |
582 | } |
583 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
584 | ||
585 | /* | |
586 | * USB driver handlers. | |
587 | */ | |
588 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
589 | { | |
590 | kfree(rt2x00dev->rf); | |
591 | rt2x00dev->rf = NULL; | |
592 | ||
593 | kfree(rt2x00dev->eeprom); | |
594 | rt2x00dev->eeprom = NULL; | |
595 | ||
21795094 ID |
596 | kfree(rt2x00dev->csr.cache); |
597 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
598 | } |
599 | ||
600 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
601 | { | |
21795094 ID |
602 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
603 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
604 | goto exit; |
605 | ||
606 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
607 | if (!rt2x00dev->eeprom) | |
608 | goto exit; | |
609 | ||
610 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
611 | if (!rt2x00dev->rf) | |
612 | goto exit; | |
613 | ||
614 | return 0; | |
615 | ||
616 | exit: | |
617 | ERROR_PROBE("Failed to allocate registers.\n"); | |
618 | ||
619 | rt2x00usb_free_reg(rt2x00dev); | |
620 | ||
621 | return -ENOMEM; | |
622 | } | |
623 | ||
624 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
625 | const struct usb_device_id *id) | |
626 | { | |
627 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
628 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; | |
629 | struct ieee80211_hw *hw; | |
630 | struct rt2x00_dev *rt2x00dev; | |
631 | int retval; | |
632 | ||
633 | usb_dev = usb_get_dev(usb_dev); | |
634 | ||
635 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
636 | if (!hw) { | |
637 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
638 | retval = -ENOMEM; | |
639 | goto exit_put_device; | |
640 | } | |
641 | ||
642 | usb_set_intfdata(usb_intf, hw); | |
643 | ||
644 | rt2x00dev = hw->priv; | |
14a3bf89 | 645 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
646 | rt2x00dev->ops = ops; |
647 | rt2x00dev->hw = hw; | |
648 | ||
649 | retval = rt2x00usb_alloc_reg(rt2x00dev); | |
650 | if (retval) | |
651 | goto exit_free_device; | |
652 | ||
653 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
654 | if (retval) | |
655 | goto exit_free_reg; | |
656 | ||
657 | return 0; | |
658 | ||
659 | exit_free_reg: | |
660 | rt2x00usb_free_reg(rt2x00dev); | |
661 | ||
662 | exit_free_device: | |
663 | ieee80211_free_hw(hw); | |
664 | ||
665 | exit_put_device: | |
666 | usb_put_dev(usb_dev); | |
667 | ||
668 | usb_set_intfdata(usb_intf, NULL); | |
669 | ||
670 | return retval; | |
671 | } | |
672 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
673 | ||
674 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
675 | { | |
676 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
677 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
678 | ||
679 | /* | |
680 | * Free all allocated data. | |
681 | */ | |
682 | rt2x00lib_remove_dev(rt2x00dev); | |
683 | rt2x00usb_free_reg(rt2x00dev); | |
684 | ieee80211_free_hw(hw); | |
685 | ||
686 | /* | |
687 | * Free the USB device data. | |
688 | */ | |
689 | usb_set_intfdata(usb_intf, NULL); | |
690 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
691 | } | |
692 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
693 | ||
694 | #ifdef CONFIG_PM | |
695 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
696 | { | |
697 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
698 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
699 | int retval; | |
700 | ||
701 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
702 | if (retval) | |
703 | return retval; | |
704 | ||
95ea3627 ID |
705 | /* |
706 | * Decrease usbdev refcount. | |
707 | */ | |
708 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
709 | ||
710 | return 0; | |
711 | } | |
712 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
713 | ||
714 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
715 | { | |
716 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
717 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 ID |
718 | |
719 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
720 | ||
499a214c | 721 | return rt2x00lib_resume(rt2x00dev); |
95ea3627 ID |
722 | } |
723 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
724 | #endif /* CONFIG_PM */ | |
725 | ||
726 | /* | |
181d6902 | 727 | * rt2x00usb module information. |
95ea3627 ID |
728 | */ |
729 | MODULE_AUTHOR(DRV_PROJECT); | |
730 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 731 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 732 | MODULE_LICENSE("GPL"); |