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95ea3627 | 1 | /* |
9c9a0d14 | 2 | Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> |
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> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
95ea3627 | 29 | #include <linux/usb.h> |
3d82346c | 30 | #include <linux/bug.h> |
95ea3627 ID |
31 | |
32 | #include "rt2x00.h" | |
33 | #include "rt2x00usb.h" | |
34 | ||
35 | /* | |
36 | * Interfacing with the HW. | |
37 | */ | |
0e14f6d3 | 38 | int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev, |
95ea3627 ID |
39 | const u8 request, const u8 requesttype, |
40 | const u16 offset, const u16 value, | |
41 | void *buffer, const u16 buffer_length, | |
e9136550 | 42 | const int timeout) |
95ea3627 | 43 | { |
c1d35dfa | 44 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
95ea3627 ID |
45 | int status; |
46 | unsigned int i; | |
47 | unsigned int pipe = | |
48 | (requesttype == USB_VENDOR_REQUEST_IN) ? | |
49 | usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0); | |
50 | ||
66f84d65 SC |
51 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
52 | return -ENODEV; | |
3d82346c | 53 | |
95ea3627 ID |
54 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
55 | status = usb_control_msg(usb_dev, pipe, request, requesttype, | |
56 | value, offset, buffer, buffer_length, | |
57 | timeout); | |
58 | if (status >= 0) | |
59 | return 0; | |
60 | ||
61 | /* | |
e9136550 | 62 | * Check for errors |
95ea3627 | 63 | * -ENODEV: Device has disappeared, no point continuing. |
e9136550 | 64 | * All other errors: Try again. |
95ea3627 | 65 | */ |
66f84d65 SC |
66 | else if (status == -ENODEV) { |
67 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
95ea3627 | 68 | break; |
66f84d65 | 69 | } |
95ea3627 ID |
70 | } |
71 | ||
72 | ERROR(rt2x00dev, | |
73 | "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n", | |
74 | request, offset, status); | |
75 | ||
76 | return status; | |
77 | } | |
78 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request); | |
79 | ||
3d82346c AB |
80 | int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev, |
81 | const u8 request, const u8 requesttype, | |
82 | const u16 offset, void *buffer, | |
83 | const u16 buffer_length, const int timeout) | |
95ea3627 ID |
84 | { |
85 | int status; | |
86 | ||
8ff48a8b | 87 | BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex)); |
3d82346c | 88 | |
95ea3627 ID |
89 | /* |
90 | * Check for Cache availability. | |
91 | */ | |
21795094 | 92 | if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) { |
95ea3627 ID |
93 | ERROR(rt2x00dev, "CSR cache not available.\n"); |
94 | return -ENOMEM; | |
95 | } | |
96 | ||
97 | if (requesttype == USB_VENDOR_REQUEST_OUT) | |
21795094 | 98 | memcpy(rt2x00dev->csr.cache, buffer, buffer_length); |
95ea3627 ID |
99 | |
100 | status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype, | |
21795094 | 101 | offset, 0, rt2x00dev->csr.cache, |
95ea3627 ID |
102 | buffer_length, timeout); |
103 | ||
104 | if (!status && requesttype == USB_VENDOR_REQUEST_IN) | |
21795094 | 105 | memcpy(buffer, rt2x00dev->csr.cache, buffer_length); |
95ea3627 ID |
106 | |
107 | return status; | |
108 | } | |
3d82346c AB |
109 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock); |
110 | ||
111 | int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev, | |
112 | const u8 request, const u8 requesttype, | |
113 | const u16 offset, void *buffer, | |
114 | const u16 buffer_length, const int timeout) | |
ed0dbeeb IM |
115 | { |
116 | int status = 0; | |
117 | unsigned char *tb; | |
118 | u16 off, len, bsize; | |
119 | ||
8ff48a8b | 120 | mutex_lock(&rt2x00dev->csr_mutex); |
ed0dbeeb | 121 | |
82f97b8d | 122 | tb = (char *)buffer; |
ed0dbeeb IM |
123 | off = offset; |
124 | len = buffer_length; | |
125 | while (len && !status) { | |
126 | bsize = min_t(u16, CSR_CACHE_SIZE, len); | |
127 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
128 | requesttype, off, tb, | |
129 | bsize, timeout); | |
130 | ||
131 | tb += bsize; | |
132 | len -= bsize; | |
133 | off += bsize; | |
134 | } | |
135 | ||
8ff48a8b | 136 | mutex_unlock(&rt2x00dev->csr_mutex); |
ed0dbeeb IM |
137 | |
138 | return status; | |
139 | } | |
96b61baf | 140 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff); |
ed0dbeeb | 141 | |
0f829b1d ID |
142 | int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev, |
143 | const unsigned int offset, | |
f255b92b | 144 | const struct rt2x00_field32 field, |
0f829b1d ID |
145 | u32 *reg) |
146 | { | |
147 | unsigned int i; | |
148 | ||
66f84d65 SC |
149 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
150 | return -ENODEV; | |
151 | ||
0f829b1d ID |
152 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
153 | rt2x00usb_register_read_lock(rt2x00dev, offset, reg); | |
154 | if (!rt2x00_get_field32(*reg, field)) | |
155 | return 1; | |
156 | udelay(REGISTER_BUSY_DELAY); | |
157 | } | |
158 | ||
159 | ERROR(rt2x00dev, "Indirect register access failed: " | |
160 | "offset=0x%.08x, value=0x%.08x\n", offset, *reg); | |
161 | *reg = ~0; | |
162 | ||
163 | return 0; | |
164 | } | |
165 | EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read); | |
166 | ||
95ea3627 ID |
167 | /* |
168 | * TX data handlers. | |
169 | */ | |
170 | static void rt2x00usb_interrupt_txdone(struct urb *urb) | |
171 | { | |
181d6902 ID |
172 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
173 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
181d6902 | 174 | struct txdone_entry_desc txdesc; |
95ea3627 | 175 | |
0262ab0d | 176 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 177 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
178 | return; |
179 | ||
95ea3627 ID |
180 | /* |
181 | * Obtain the status about this packet. | |
fb55f4d1 ID |
182 | * Note that when the status is 0 it does not mean the |
183 | * frame was send out correctly. It only means the frame | |
184 | * was succesfully pushed to the hardware, we have no | |
185 | * way to determine the transmission status right now. | |
186 | * (Only indirectly by looking at the failed TX counters | |
187 | * in the register). | |
95ea3627 | 188 | */ |
f126cba4 | 189 | txdesc.flags = 0; |
fb55f4d1 ID |
190 | if (!urb->status) |
191 | __set_bit(TXDONE_UNKNOWN, &txdesc.flags); | |
192 | else | |
193 | __set_bit(TXDONE_FAILURE, &txdesc.flags); | |
181d6902 | 194 | txdesc.retry = 0; |
95ea3627 | 195 | |
181d6902 | 196 | rt2x00lib_txdone(entry, &txdesc); |
95ea3627 ID |
197 | } |
198 | ||
f019d514 ID |
199 | static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry) |
200 | { | |
fe725697 GW |
201 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
202 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
f019d514 | 203 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
fe725697 GW |
204 | u32 length; |
205 | ||
206 | if (test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) { | |
207 | /* | |
208 | * USB devices cannot blindly pass the skb->len as the | |
209 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
210 | * to the driver to determine what the length should be. | |
211 | */ | |
212 | length = rt2x00dev->ops->lib->get_tx_data_len(entry); | |
213 | ||
214 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, | |
215 | usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
216 | entry->skb->data, length, | |
217 | rt2x00usb_interrupt_txdone, entry); | |
f019d514 | 218 | |
f019d514 | 219 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
fe725697 | 220 | } |
f019d514 ID |
221 | } |
222 | ||
223 | void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, | |
224 | const enum data_queue_qid qid) | |
225 | { | |
226 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
227 | unsigned long irqflags; | |
228 | unsigned int index; | |
229 | unsigned int index_done; | |
230 | unsigned int i; | |
231 | ||
232 | /* | |
233 | * Only protect the range we are going to loop over, | |
234 | * if during our loop a extra entry is set to pending | |
235 | * it should not be kicked during this run, since it | |
236 | * is part of another TX operation. | |
237 | */ | |
238 | spin_lock_irqsave(&queue->lock, irqflags); | |
239 | index = queue->index[Q_INDEX]; | |
240 | index_done = queue->index[Q_INDEX_DONE]; | |
241 | spin_unlock_irqrestore(&queue->lock, irqflags); | |
242 | ||
243 | /* | |
244 | * Start from the TX done pointer, this guarentees that we will | |
245 | * send out all frames in the correct order. | |
246 | */ | |
247 | if (index_done < index) { | |
248 | for (i = index_done; i < index; i++) | |
249 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
250 | } else { | |
251 | for (i = index_done; i < queue->limit; i++) | |
252 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
253 | ||
254 | for (i = 0; i < index; i++) | |
255 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
256 | } | |
257 | } | |
258 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue); | |
259 | ||
a2c9b652 ID |
260 | void rt2x00usb_kill_tx_queue(struct rt2x00_dev *rt2x00dev, |
261 | const enum data_queue_qid qid) | |
262 | { | |
263 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
264 | struct queue_entry_priv_usb *entry_priv; | |
265 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
266 | unsigned int i; | |
267 | bool kill_guard; | |
268 | ||
269 | /* | |
270 | * When killing the beacon queue, we must also kill | |
271 | * the beacon guard byte. | |
272 | */ | |
273 | kill_guard = | |
274 | (qid == QID_BEACON) && | |
275 | (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)); | |
276 | ||
277 | /* | |
278 | * Cancel all entries. | |
279 | */ | |
280 | for (i = 0; i < queue->limit; i++) { | |
281 | entry_priv = queue->entries[i].priv_data; | |
282 | usb_kill_urb(entry_priv->urb); | |
283 | ||
284 | /* | |
285 | * Kill guardian urb (if required by driver). | |
286 | */ | |
287 | if (kill_guard) { | |
288 | bcn_priv = queue->entries[i].priv_data; | |
289 | usb_kill_urb(bcn_priv->guardian_urb); | |
290 | } | |
291 | } | |
292 | } | |
293 | EXPORT_SYMBOL_GPL(rt2x00usb_kill_tx_queue); | |
294 | ||
95ea3627 ID |
295 | /* |
296 | * RX data handlers. | |
297 | */ | |
298 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
299 | { | |
181d6902 ID |
300 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
301 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
c4da0048 | 302 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
a26cbc65 | 303 | u8 rxd[32]; |
95ea3627 | 304 | |
0262ab0d | 305 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 306 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
307 | return; |
308 | ||
309 | /* | |
310 | * Check if the received data is simply too small | |
311 | * to be actually valid, or if the urb is signaling | |
312 | * a problem. | |
313 | */ | |
d74f5ba4 | 314 | if (urb->actual_length < entry->queue->desc_size || urb->status) { |
0262ab0d | 315 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
d74f5ba4 ID |
316 | usb_submit_urb(urb, GFP_ATOMIC); |
317 | return; | |
318 | } | |
95ea3627 | 319 | |
40561b84 | 320 | /* |
c4da0048 | 321 | * Fill in desc fields of the skb descriptor |
40561b84 | 322 | */ |
a26cbc65 GW |
323 | skbdesc->desc = rxd; |
324 | skbdesc->desc_len = entry->queue->desc_size; | |
40561b84 | 325 | |
95ea3627 ID |
326 | /* |
327 | * Send the frame to rt2x00lib for further processing. | |
328 | */ | |
c4da0048 | 329 | rt2x00lib_rxdone(rt2x00dev, entry); |
95ea3627 ID |
330 | } |
331 | ||
332 | /* | |
333 | * Radio handlers | |
334 | */ | |
95ea3627 ID |
335 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
336 | { | |
bd394a74 | 337 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 ID |
338 | REGISTER_TIMEOUT); |
339 | ||
340 | /* | |
a2c9b652 ID |
341 | * The USB version of kill_tx_queue also works |
342 | * on the RX queue. | |
b8be63ff | 343 | */ |
a2c9b652 | 344 | rt2x00dev->ops->lib->kill_tx_queue(rt2x00dev, QID_RX); |
95ea3627 ID |
345 | } |
346 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
347 | ||
348 | /* | |
349 | * Device initialization handlers. | |
350 | */ | |
798b7adb | 351 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 352 | { |
798b7adb ID |
353 | struct usb_device *usb_dev = |
354 | to_usb_device_intf(entry->queue->rt2x00dev->dev); | |
b8be63ff | 355 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
f1ca2167 | 356 | int pipe; |
837e7f24 | 357 | |
798b7adb | 358 | if (entry->queue->qid == QID_RX) { |
f1ca2167 ID |
359 | pipe = usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint); |
360 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, pipe, | |
798b7adb ID |
361 | entry->skb->data, entry->skb->len, |
362 | rt2x00usb_interrupt_rxdone, entry); | |
837e7f24 | 363 | |
798b7adb ID |
364 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
365 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
366 | } else { | |
367 | entry->flags = 0; | |
368 | } | |
837e7f24 | 369 | } |
798b7adb | 370 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 371 | |
f1ca2167 ID |
372 | static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
373 | struct usb_endpoint_descriptor *ep_desc) | |
374 | { | |
375 | struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); | |
376 | int pipe; | |
377 | ||
378 | queue->usb_endpoint = usb_endpoint_num(ep_desc); | |
379 | ||
380 | if (queue->qid == QID_RX) { | |
381 | pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); | |
382 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); | |
383 | } else { | |
384 | pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); | |
385 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); | |
386 | } | |
387 | ||
388 | if (!queue->usb_maxpacket) | |
389 | queue->usb_maxpacket = 1; | |
390 | } | |
391 | ||
392 | static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) | |
393 | { | |
394 | struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); | |
395 | struct usb_host_interface *intf_desc = intf->cur_altsetting; | |
396 | struct usb_endpoint_descriptor *ep_desc; | |
397 | struct data_queue *queue = rt2x00dev->tx; | |
398 | struct usb_endpoint_descriptor *tx_ep_desc = NULL; | |
399 | unsigned int i; | |
400 | ||
401 | /* | |
402 | * Walk through all available endpoints to search for "bulk in" | |
403 | * and "bulk out" endpoints. When we find such endpoints collect | |
404 | * the information we need from the descriptor and assign it | |
405 | * to the queue. | |
406 | */ | |
407 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
408 | ep_desc = &intf_desc->endpoint[i].desc; | |
409 | ||
410 | if (usb_endpoint_is_bulk_in(ep_desc)) { | |
411 | rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); | |
d15cfc3a ID |
412 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
413 | (queue != queue_end(rt2x00dev))) { | |
f1ca2167 | 414 | rt2x00usb_assign_endpoint(queue, ep_desc); |
d15cfc3a | 415 | queue = queue_next(queue); |
f1ca2167 | 416 | |
f1ca2167 ID |
417 | tx_ep_desc = ep_desc; |
418 | } | |
419 | } | |
420 | ||
421 | /* | |
422 | * At least 1 endpoint for RX and 1 endpoint for TX must be available. | |
423 | */ | |
424 | if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { | |
425 | ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); | |
426 | return -EPIPE; | |
427 | } | |
428 | ||
429 | /* | |
430 | * It might be possible not all queues have a dedicated endpoint. | |
431 | * Loop through all TX queues and copy the endpoint information | |
432 | * which we have gathered from already assigned endpoints. | |
433 | */ | |
434 | txall_queue_for_each(rt2x00dev, queue) { | |
435 | if (!queue->usb_endpoint) | |
436 | rt2x00usb_assign_endpoint(queue, tx_ep_desc); | |
437 | } | |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
95ea3627 | 442 | static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, |
181d6902 | 443 | struct data_queue *queue) |
95ea3627 | 444 | { |
b8be63ff ID |
445 | struct queue_entry_priv_usb *entry_priv; |
446 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
447 | unsigned int i; |
448 | ||
b8be63ff ID |
449 | for (i = 0; i < queue->limit; i++) { |
450 | entry_priv = queue->entries[i].priv_data; | |
451 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
452 | if (!entry_priv->urb) | |
453 | return -ENOMEM; | |
454 | } | |
455 | ||
95ea3627 | 456 | /* |
b8be63ff ID |
457 | * If this is not the beacon queue or |
458 | * no guardian byte was required for the beacon, | |
459 | * then we are done. | |
95ea3627 | 460 | */ |
b8be63ff ID |
461 | if (rt2x00dev->bcn != queue || |
462 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
463 | return 0; | |
464 | ||
181d6902 | 465 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
466 | bcn_priv = queue->entries[i].priv_data; |
467 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
468 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
469 | return -ENOMEM; |
470 | } | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
475 | static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 476 | struct data_queue *queue) |
95ea3627 | 477 | { |
b8be63ff ID |
478 | struct queue_entry_priv_usb *entry_priv; |
479 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
480 | unsigned int i; |
481 | ||
181d6902 | 482 | if (!queue->entries) |
95ea3627 ID |
483 | return; |
484 | ||
181d6902 | 485 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
486 | entry_priv = queue->entries[i].priv_data; |
487 | usb_kill_urb(entry_priv->urb); | |
488 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 489 | } |
b8be63ff ID |
490 | |
491 | /* | |
492 | * If this is not the beacon queue or | |
493 | * no guardian byte was required for the beacon, | |
494 | * then we are done. | |
495 | */ | |
496 | if (rt2x00dev->bcn != queue || | |
497 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
498 | return; | |
499 | ||
500 | for (i = 0; i < queue->limit; i++) { | |
501 | bcn_priv = queue->entries[i].priv_data; | |
502 | usb_kill_urb(bcn_priv->guardian_urb); | |
503 | usb_free_urb(bcn_priv->guardian_urb); | |
504 | } | |
95ea3627 ID |
505 | } |
506 | ||
507 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
508 | { | |
181d6902 | 509 | struct data_queue *queue; |
30caa6e3 | 510 | int status; |
95ea3627 | 511 | |
f1ca2167 ID |
512 | /* |
513 | * Find endpoints for each queue | |
514 | */ | |
515 | status = rt2x00usb_find_endpoints(rt2x00dev); | |
516 | if (status) | |
517 | goto exit; | |
518 | ||
95ea3627 ID |
519 | /* |
520 | * Allocate DMA | |
521 | */ | |
181d6902 ID |
522 | queue_for_each(rt2x00dev, queue) { |
523 | status = rt2x00usb_alloc_urb(rt2x00dev, queue); | |
95ea3627 ID |
524 | if (status) |
525 | goto exit; | |
526 | } | |
527 | ||
95ea3627 ID |
528 | return 0; |
529 | ||
530 | exit: | |
531 | rt2x00usb_uninitialize(rt2x00dev); | |
532 | ||
533 | return status; | |
534 | } | |
535 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
536 | ||
537 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
538 | { | |
181d6902 | 539 | struct data_queue *queue; |
95ea3627 | 540 | |
181d6902 ID |
541 | queue_for_each(rt2x00dev, queue) |
542 | rt2x00usb_free_urb(rt2x00dev, queue); | |
95ea3627 ID |
543 | } |
544 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
545 | ||
546 | /* | |
547 | * USB driver handlers. | |
548 | */ | |
549 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
550 | { | |
551 | kfree(rt2x00dev->rf); | |
552 | rt2x00dev->rf = NULL; | |
553 | ||
554 | kfree(rt2x00dev->eeprom); | |
555 | rt2x00dev->eeprom = NULL; | |
556 | ||
21795094 ID |
557 | kfree(rt2x00dev->csr.cache); |
558 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
559 | } |
560 | ||
561 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
562 | { | |
21795094 ID |
563 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
564 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
565 | goto exit; |
566 | ||
567 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
568 | if (!rt2x00dev->eeprom) | |
569 | goto exit; | |
570 | ||
571 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
572 | if (!rt2x00dev->rf) | |
573 | goto exit; | |
574 | ||
575 | return 0; | |
576 | ||
577 | exit: | |
578 | ERROR_PROBE("Failed to allocate registers.\n"); | |
579 | ||
580 | rt2x00usb_free_reg(rt2x00dev); | |
581 | ||
582 | return -ENOMEM; | |
583 | } | |
584 | ||
585 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
586 | const struct usb_device_id *id) | |
587 | { | |
588 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
589 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; | |
590 | struct ieee80211_hw *hw; | |
591 | struct rt2x00_dev *rt2x00dev; | |
592 | int retval; | |
593 | ||
594 | usb_dev = usb_get_dev(usb_dev); | |
595 | ||
596 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
597 | if (!hw) { | |
598 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
599 | retval = -ENOMEM; | |
600 | goto exit_put_device; | |
601 | } | |
602 | ||
603 | usb_set_intfdata(usb_intf, hw); | |
604 | ||
605 | rt2x00dev = hw->priv; | |
14a3bf89 | 606 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
607 | rt2x00dev->ops = ops; |
608 | rt2x00dev->hw = hw; | |
609 | ||
2015d192 GW |
610 | rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); |
611 | ||
95ea3627 ID |
612 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
613 | if (retval) | |
614 | goto exit_free_device; | |
615 | ||
616 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
617 | if (retval) | |
618 | goto exit_free_reg; | |
619 | ||
620 | return 0; | |
621 | ||
622 | exit_free_reg: | |
623 | rt2x00usb_free_reg(rt2x00dev); | |
624 | ||
625 | exit_free_device: | |
626 | ieee80211_free_hw(hw); | |
627 | ||
628 | exit_put_device: | |
629 | usb_put_dev(usb_dev); | |
630 | ||
631 | usb_set_intfdata(usb_intf, NULL); | |
632 | ||
633 | return retval; | |
634 | } | |
635 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
636 | ||
637 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
638 | { | |
639 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
640 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
641 | ||
642 | /* | |
643 | * Free all allocated data. | |
644 | */ | |
645 | rt2x00lib_remove_dev(rt2x00dev); | |
646 | rt2x00usb_free_reg(rt2x00dev); | |
647 | ieee80211_free_hw(hw); | |
648 | ||
649 | /* | |
650 | * Free the USB device data. | |
651 | */ | |
652 | usb_set_intfdata(usb_intf, NULL); | |
653 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
654 | } | |
655 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
656 | ||
657 | #ifdef CONFIG_PM | |
658 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
659 | { | |
660 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
661 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
662 | int retval; | |
663 | ||
664 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
665 | if (retval) | |
666 | return retval; | |
667 | ||
95ea3627 ID |
668 | /* |
669 | * Decrease usbdev refcount. | |
670 | */ | |
671 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
672 | ||
673 | return 0; | |
674 | } | |
675 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
676 | ||
677 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
678 | { | |
679 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
680 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 ID |
681 | |
682 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
683 | ||
499a214c | 684 | return rt2x00lib_resume(rt2x00dev); |
95ea3627 ID |
685 | } |
686 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
687 | #endif /* CONFIG_PM */ | |
688 | ||
689 | /* | |
181d6902 | 690 | * rt2x00usb module information. |
95ea3627 ID |
691 | */ |
692 | MODULE_AUTHOR(DRV_PROJECT); | |
693 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 694 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 695 | MODULE_LICENSE("GPL"); |