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95ea3627 | 1 | /* |
811aa9ca | 2 | Copyright (C) 2004 - 2008 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 | ||
3d82346c AB |
82 | BUG_ON(!mutex_is_locked(&rt2x00dev->usb_cache_mutex)); |
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 | ||
113 | mutex_lock(&rt2x00dev->usb_cache_mutex); | |
114 | ||
115 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
116 | requesttype, offset, buffer, | |
117 | buffer_length, timeout); | |
118 | ||
119 | mutex_unlock(&rt2x00dev->usb_cache_mutex); | |
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 | ||
135 | mutex_lock(&rt2x00dev->usb_cache_mutex); | |
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 | ||
151 | mutex_unlock(&rt2x00dev->usb_cache_mutex); | |
152 | ||
153 | return status; | |
154 | } | |
155 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_large_buff); | |
156 | ||
95ea3627 ID |
157 | /* |
158 | * TX data handlers. | |
159 | */ | |
160 | static void rt2x00usb_interrupt_txdone(struct urb *urb) | |
161 | { | |
181d6902 ID |
162 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
163 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
181d6902 | 164 | struct txdone_entry_desc txdesc; |
95ea3627 | 165 | |
0262ab0d | 166 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 167 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
168 | return; |
169 | ||
95ea3627 ID |
170 | /* |
171 | * Obtain the status about this packet. | |
fb55f4d1 ID |
172 | * Note that when the status is 0 it does not mean the |
173 | * frame was send out correctly. It only means the frame | |
174 | * was succesfully pushed to the hardware, we have no | |
175 | * way to determine the transmission status right now. | |
176 | * (Only indirectly by looking at the failed TX counters | |
177 | * in the register). | |
95ea3627 | 178 | */ |
f126cba4 | 179 | txdesc.flags = 0; |
fb55f4d1 ID |
180 | if (!urb->status) |
181 | __set_bit(TXDONE_UNKNOWN, &txdesc.flags); | |
182 | else | |
183 | __set_bit(TXDONE_FAILURE, &txdesc.flags); | |
181d6902 | 184 | txdesc.retry = 0; |
95ea3627 | 185 | |
181d6902 | 186 | rt2x00lib_txdone(entry, &txdesc); |
95ea3627 ID |
187 | } |
188 | ||
6db3786a | 189 | int rt2x00usb_write_tx_data(struct queue_entry *entry) |
95ea3627 | 190 | { |
6db3786a | 191 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
c1d35dfa | 192 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
b8be63ff | 193 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
181d6902 | 194 | struct skb_frame_desc *skbdesc; |
dd9fa2d2 | 195 | u32 length; |
95ea3627 | 196 | |
95ea3627 ID |
197 | /* |
198 | * Add the descriptor in front of the skb. | |
199 | */ | |
6db3786a ID |
200 | skb_push(entry->skb, entry->queue->desc_size); |
201 | memset(entry->skb->data, 0, entry->queue->desc_size); | |
95ea3627 | 202 | |
08992f7f ID |
203 | /* |
204 | * Fill in skb descriptor | |
205 | */ | |
6db3786a | 206 | skbdesc = get_skb_frame_desc(entry->skb); |
6db3786a ID |
207 | skbdesc->desc = entry->skb->data; |
208 | skbdesc->desc_len = entry->queue->desc_size; | |
08992f7f | 209 | |
95ea3627 | 210 | /* |
dd9fa2d2 ID |
211 | * USB devices cannot blindly pass the skb->len as the |
212 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
213 | * to the driver to determine what the length should be. | |
95ea3627 | 214 | */ |
6db3786a | 215 | length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, entry->skb); |
95ea3627 | 216 | |
6db3786a ID |
217 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
218 | usb_sndbulkpipe(usb_dev, 1), | |
219 | entry->skb->data, length, | |
220 | rt2x00usb_interrupt_txdone, entry); | |
95ea3627 | 221 | |
1abc3656 MN |
222 | /* |
223 | * Make sure the skb->data pointer points to the frame, not the | |
224 | * descriptor. | |
225 | */ | |
226 | skb_pull(entry->skb, entry->queue->desc_size); | |
227 | ||
95ea3627 ID |
228 | return 0; |
229 | } | |
230 | EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data); | |
231 | ||
f019d514 ID |
232 | static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry) |
233 | { | |
234 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
235 | ||
0262ab0d | 236 | if (test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) |
f019d514 ID |
237 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
238 | } | |
239 | ||
240 | void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, | |
241 | const enum data_queue_qid qid) | |
242 | { | |
243 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
244 | unsigned long irqflags; | |
245 | unsigned int index; | |
246 | unsigned int index_done; | |
247 | unsigned int i; | |
248 | ||
249 | /* | |
250 | * Only protect the range we are going to loop over, | |
251 | * if during our loop a extra entry is set to pending | |
252 | * it should not be kicked during this run, since it | |
253 | * is part of another TX operation. | |
254 | */ | |
255 | spin_lock_irqsave(&queue->lock, irqflags); | |
256 | index = queue->index[Q_INDEX]; | |
257 | index_done = queue->index[Q_INDEX_DONE]; | |
258 | spin_unlock_irqrestore(&queue->lock, irqflags); | |
259 | ||
260 | /* | |
261 | * Start from the TX done pointer, this guarentees that we will | |
262 | * send out all frames in the correct order. | |
263 | */ | |
264 | if (index_done < index) { | |
265 | for (i = index_done; i < index; i++) | |
266 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
267 | } else { | |
268 | for (i = index_done; i < queue->limit; i++) | |
269 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
270 | ||
271 | for (i = 0; i < index; i++) | |
272 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
273 | } | |
274 | } | |
275 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue); | |
276 | ||
95ea3627 ID |
277 | /* |
278 | * RX data handlers. | |
279 | */ | |
280 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
281 | { | |
181d6902 ID |
282 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
283 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
c4da0048 | 284 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
a26cbc65 | 285 | u8 rxd[32]; |
95ea3627 | 286 | |
0262ab0d | 287 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 288 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
289 | return; |
290 | ||
291 | /* | |
292 | * Check if the received data is simply too small | |
293 | * to be actually valid, or if the urb is signaling | |
294 | * a problem. | |
295 | */ | |
d74f5ba4 | 296 | if (urb->actual_length < entry->queue->desc_size || urb->status) { |
0262ab0d | 297 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
d74f5ba4 ID |
298 | usb_submit_urb(urb, GFP_ATOMIC); |
299 | return; | |
300 | } | |
95ea3627 | 301 | |
40561b84 | 302 | /* |
c4da0048 | 303 | * Fill in desc fields of the skb descriptor |
40561b84 | 304 | */ |
a26cbc65 GW |
305 | skbdesc->desc = rxd; |
306 | skbdesc->desc_len = entry->queue->desc_size; | |
40561b84 | 307 | |
95ea3627 ID |
308 | /* |
309 | * Send the frame to rt2x00lib for further processing. | |
310 | */ | |
c4da0048 | 311 | rt2x00lib_rxdone(rt2x00dev, entry); |
95ea3627 ID |
312 | } |
313 | ||
314 | /* | |
315 | * Radio handlers | |
316 | */ | |
95ea3627 ID |
317 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
318 | { | |
b8be63ff ID |
319 | struct queue_entry_priv_usb *entry_priv; |
320 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
40af48ce | 321 | struct data_queue *queue; |
95ea3627 ID |
322 | unsigned int i; |
323 | ||
bd394a74 | 324 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 ID |
325 | REGISTER_TIMEOUT); |
326 | ||
327 | /* | |
181d6902 | 328 | * Cancel all queues. |
95ea3627 | 329 | */ |
40af48ce ID |
330 | queue_for_each(rt2x00dev, queue) { |
331 | for (i = 0; i < queue->limit; i++) { | |
332 | entry_priv = queue->entries[i].priv_data; | |
333 | usb_kill_urb(entry_priv->urb); | |
334 | } | |
95ea3627 | 335 | } |
330e3f95 | 336 | |
b8be63ff | 337 | /* |
edfa78b2 | 338 | * Kill guardian urb (if required by driver). |
b8be63ff | 339 | */ |
edfa78b2 ID |
340 | if (!test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) |
341 | return; | |
342 | ||
330e3f95 | 343 | for (i = 0; i < rt2x00dev->bcn->limit; i++) { |
b8be63ff ID |
344 | bcn_priv = rt2x00dev->bcn->entries[i].priv_data; |
345 | if (bcn_priv->guardian_urb) | |
346 | usb_kill_urb(bcn_priv->guardian_urb); | |
330e3f95 | 347 | } |
95ea3627 ID |
348 | } |
349 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
350 | ||
351 | /* | |
352 | * Device initialization handlers. | |
353 | */ | |
798b7adb | 354 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 355 | { |
798b7adb ID |
356 | struct usb_device *usb_dev = |
357 | to_usb_device_intf(entry->queue->rt2x00dev->dev); | |
b8be63ff | 358 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
837e7f24 | 359 | |
798b7adb ID |
360 | if (entry->queue->qid == QID_RX) { |
361 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, | |
362 | usb_rcvbulkpipe(usb_dev, 1), | |
363 | entry->skb->data, entry->skb->len, | |
364 | rt2x00usb_interrupt_rxdone, entry); | |
837e7f24 | 365 | |
798b7adb ID |
366 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
367 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
368 | } else { | |
369 | entry->flags = 0; | |
370 | } | |
837e7f24 | 371 | } |
798b7adb | 372 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 373 | |
95ea3627 | 374 | static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, |
181d6902 | 375 | struct data_queue *queue) |
95ea3627 | 376 | { |
b8be63ff ID |
377 | struct queue_entry_priv_usb *entry_priv; |
378 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
379 | unsigned int i; |
380 | ||
b8be63ff ID |
381 | for (i = 0; i < queue->limit; i++) { |
382 | entry_priv = queue->entries[i].priv_data; | |
383 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
384 | if (!entry_priv->urb) | |
385 | return -ENOMEM; | |
386 | } | |
387 | ||
95ea3627 | 388 | /* |
b8be63ff ID |
389 | * If this is not the beacon queue or |
390 | * no guardian byte was required for the beacon, | |
391 | * then we are done. | |
95ea3627 | 392 | */ |
b8be63ff ID |
393 | if (rt2x00dev->bcn != queue || |
394 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
395 | return 0; | |
396 | ||
181d6902 | 397 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
398 | bcn_priv = queue->entries[i].priv_data; |
399 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
400 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
401 | return -ENOMEM; |
402 | } | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 408 | struct data_queue *queue) |
95ea3627 | 409 | { |
b8be63ff ID |
410 | struct queue_entry_priv_usb *entry_priv; |
411 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
412 | unsigned int i; |
413 | ||
181d6902 | 414 | if (!queue->entries) |
95ea3627 ID |
415 | return; |
416 | ||
181d6902 | 417 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
418 | entry_priv = queue->entries[i].priv_data; |
419 | usb_kill_urb(entry_priv->urb); | |
420 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 421 | } |
b8be63ff ID |
422 | |
423 | /* | |
424 | * If this is not the beacon queue or | |
425 | * no guardian byte was required for the beacon, | |
426 | * then we are done. | |
427 | */ | |
428 | if (rt2x00dev->bcn != queue || | |
429 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
430 | return; | |
431 | ||
432 | for (i = 0; i < queue->limit; i++) { | |
433 | bcn_priv = queue->entries[i].priv_data; | |
434 | usb_kill_urb(bcn_priv->guardian_urb); | |
435 | usb_free_urb(bcn_priv->guardian_urb); | |
436 | } | |
95ea3627 ID |
437 | } |
438 | ||
439 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
440 | { | |
181d6902 | 441 | struct data_queue *queue; |
30caa6e3 | 442 | int status; |
95ea3627 ID |
443 | |
444 | /* | |
445 | * Allocate DMA | |
446 | */ | |
181d6902 ID |
447 | queue_for_each(rt2x00dev, queue) { |
448 | status = rt2x00usb_alloc_urb(rt2x00dev, queue); | |
95ea3627 ID |
449 | if (status) |
450 | goto exit; | |
451 | } | |
452 | ||
95ea3627 ID |
453 | return 0; |
454 | ||
455 | exit: | |
456 | rt2x00usb_uninitialize(rt2x00dev); | |
457 | ||
458 | return status; | |
459 | } | |
460 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
461 | ||
462 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
463 | { | |
181d6902 | 464 | struct data_queue *queue; |
95ea3627 | 465 | |
181d6902 ID |
466 | queue_for_each(rt2x00dev, queue) |
467 | rt2x00usb_free_urb(rt2x00dev, queue); | |
95ea3627 ID |
468 | } |
469 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
470 | ||
471 | /* | |
472 | * USB driver handlers. | |
473 | */ | |
474 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
475 | { | |
476 | kfree(rt2x00dev->rf); | |
477 | rt2x00dev->rf = NULL; | |
478 | ||
479 | kfree(rt2x00dev->eeprom); | |
480 | rt2x00dev->eeprom = NULL; | |
481 | ||
21795094 ID |
482 | kfree(rt2x00dev->csr.cache); |
483 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
484 | } |
485 | ||
486 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
487 | { | |
21795094 ID |
488 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
489 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
490 | goto exit; |
491 | ||
492 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
493 | if (!rt2x00dev->eeprom) | |
494 | goto exit; | |
495 | ||
496 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
497 | if (!rt2x00dev->rf) | |
498 | goto exit; | |
499 | ||
500 | return 0; | |
501 | ||
502 | exit: | |
503 | ERROR_PROBE("Failed to allocate registers.\n"); | |
504 | ||
505 | rt2x00usb_free_reg(rt2x00dev); | |
506 | ||
507 | return -ENOMEM; | |
508 | } | |
509 | ||
510 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
511 | const struct usb_device_id *id) | |
512 | { | |
513 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
514 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; | |
515 | struct ieee80211_hw *hw; | |
516 | struct rt2x00_dev *rt2x00dev; | |
517 | int retval; | |
518 | ||
519 | usb_dev = usb_get_dev(usb_dev); | |
520 | ||
521 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
522 | if (!hw) { | |
523 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
524 | retval = -ENOMEM; | |
525 | goto exit_put_device; | |
526 | } | |
527 | ||
528 | usb_set_intfdata(usb_intf, hw); | |
529 | ||
530 | rt2x00dev = hw->priv; | |
14a3bf89 | 531 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
532 | rt2x00dev->ops = ops; |
533 | rt2x00dev->hw = hw; | |
3d82346c | 534 | mutex_init(&rt2x00dev->usb_cache_mutex); |
95ea3627 | 535 | |
b242e891 ID |
536 | rt2x00dev->usb_maxpacket = |
537 | usb_maxpacket(usb_dev, usb_sndbulkpipe(usb_dev, 1), 1); | |
538 | if (!rt2x00dev->usb_maxpacket) | |
539 | rt2x00dev->usb_maxpacket = 1; | |
540 | ||
95ea3627 ID |
541 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
542 | if (retval) | |
543 | goto exit_free_device; | |
544 | ||
545 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
546 | if (retval) | |
547 | goto exit_free_reg; | |
548 | ||
549 | return 0; | |
550 | ||
551 | exit_free_reg: | |
552 | rt2x00usb_free_reg(rt2x00dev); | |
553 | ||
554 | exit_free_device: | |
555 | ieee80211_free_hw(hw); | |
556 | ||
557 | exit_put_device: | |
558 | usb_put_dev(usb_dev); | |
559 | ||
560 | usb_set_intfdata(usb_intf, NULL); | |
561 | ||
562 | return retval; | |
563 | } | |
564 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
565 | ||
566 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
567 | { | |
568 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
569 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
570 | ||
571 | /* | |
572 | * Free all allocated data. | |
573 | */ | |
574 | rt2x00lib_remove_dev(rt2x00dev); | |
575 | rt2x00usb_free_reg(rt2x00dev); | |
576 | ieee80211_free_hw(hw); | |
577 | ||
578 | /* | |
579 | * Free the USB device data. | |
580 | */ | |
581 | usb_set_intfdata(usb_intf, NULL); | |
582 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
583 | } | |
584 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
585 | ||
586 | #ifdef CONFIG_PM | |
587 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
588 | { | |
589 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
590 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
591 | int retval; | |
592 | ||
593 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
594 | if (retval) | |
595 | return retval; | |
596 | ||
597 | rt2x00usb_free_reg(rt2x00dev); | |
598 | ||
599 | /* | |
600 | * Decrease usbdev refcount. | |
601 | */ | |
602 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
603 | ||
604 | return 0; | |
605 | } | |
606 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
607 | ||
608 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
609 | { | |
610 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
611 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
612 | int retval; | |
613 | ||
614 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
615 | ||
616 | retval = rt2x00usb_alloc_reg(rt2x00dev); | |
617 | if (retval) | |
618 | return retval; | |
619 | ||
620 | retval = rt2x00lib_resume(rt2x00dev); | |
621 | if (retval) | |
622 | goto exit_free_reg; | |
623 | ||
624 | return 0; | |
625 | ||
626 | exit_free_reg: | |
627 | rt2x00usb_free_reg(rt2x00dev); | |
628 | ||
629 | return retval; | |
630 | } | |
631 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
632 | #endif /* CONFIG_PM */ | |
633 | ||
634 | /* | |
181d6902 | 635 | * rt2x00usb module information. |
95ea3627 ID |
636 | */ |
637 | MODULE_AUTHOR(DRV_PROJECT); | |
638 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 639 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 640 | MODULE_LICENSE("GPL"); |