Commit | Line | Data |
---|---|---|
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 | { |
181d6902 | 43 | struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev); |
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 | ||
125 | /* | |
126 | * TX data handlers. | |
127 | */ | |
128 | static void rt2x00usb_interrupt_txdone(struct urb *urb) | |
129 | { | |
181d6902 ID |
130 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
131 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
181d6902 | 132 | struct txdone_entry_desc txdesc; |
e039fa4a | 133 | enum data_queue_qid qid = skb_get_queue_mapping(entry->skb); |
95ea3627 ID |
134 | |
135 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || | |
181d6902 | 136 | !__test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
137 | return; |
138 | ||
95ea3627 ID |
139 | /* |
140 | * Remove the descriptor data from the buffer. | |
141 | */ | |
181d6902 | 142 | skb_pull(entry->skb, entry->queue->desc_size); |
95ea3627 ID |
143 | |
144 | /* | |
145 | * Obtain the status about this packet. | |
fb55f4d1 ID |
146 | * Note that when the status is 0 it does not mean the |
147 | * frame was send out correctly. It only means the frame | |
148 | * was succesfully pushed to the hardware, we have no | |
149 | * way to determine the transmission status right now. | |
150 | * (Only indirectly by looking at the failed TX counters | |
151 | * in the register). | |
95ea3627 | 152 | */ |
fb55f4d1 ID |
153 | if (!urb->status) |
154 | __set_bit(TXDONE_UNKNOWN, &txdesc.flags); | |
155 | else | |
156 | __set_bit(TXDONE_FAILURE, &txdesc.flags); | |
181d6902 | 157 | txdesc.retry = 0; |
95ea3627 | 158 | |
181d6902 | 159 | rt2x00lib_txdone(entry, &txdesc); |
95ea3627 ID |
160 | |
161 | /* | |
162 | * Make this entry available for reuse. | |
163 | */ | |
164 | entry->flags = 0; | |
181d6902 | 165 | rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE); |
95ea3627 ID |
166 | |
167 | /* | |
b869767b ID |
168 | * If the data queue was below the threshold before the txdone |
169 | * handler we must make sure the packet queue in the mac80211 stack | |
95ea3627 ID |
170 | * is reenabled when the txdone handler has finished. |
171 | */ | |
b869767b | 172 | if (!rt2x00queue_threshold(entry->queue)) |
e039fa4a | 173 | ieee80211_wake_queue(rt2x00dev->hw, qid); |
95ea3627 ID |
174 | } |
175 | ||
6db3786a | 176 | int rt2x00usb_write_tx_data(struct queue_entry *entry) |
95ea3627 | 177 | { |
6db3786a | 178 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
181d6902 | 179 | struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev); |
b8be63ff | 180 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
181d6902 | 181 | struct skb_frame_desc *skbdesc; |
dd9fa2d2 | 182 | u32 length; |
95ea3627 | 183 | |
95ea3627 ID |
184 | /* |
185 | * Add the descriptor in front of the skb. | |
186 | */ | |
6db3786a ID |
187 | skb_push(entry->skb, entry->queue->desc_size); |
188 | memset(entry->skb->data, 0, entry->queue->desc_size); | |
95ea3627 | 189 | |
08992f7f ID |
190 | /* |
191 | * Fill in skb descriptor | |
192 | */ | |
6db3786a | 193 | skbdesc = get_skb_frame_desc(entry->skb); |
e039fa4a | 194 | memset(skbdesc, 0, sizeof(*skbdesc)); |
6db3786a ID |
195 | skbdesc->desc = entry->skb->data; |
196 | skbdesc->desc_len = entry->queue->desc_size; | |
181d6902 | 197 | skbdesc->entry = entry; |
08992f7f | 198 | |
95ea3627 | 199 | /* |
dd9fa2d2 ID |
200 | * USB devices cannot blindly pass the skb->len as the |
201 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
202 | * to the driver to determine what the length should be. | |
95ea3627 | 203 | */ |
6db3786a | 204 | length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, entry->skb); |
95ea3627 | 205 | |
6db3786a ID |
206 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
207 | usb_sndbulkpipe(usb_dev, 1), | |
208 | entry->skb->data, length, | |
209 | rt2x00usb_interrupt_txdone, entry); | |
95ea3627 | 210 | |
95ea3627 ID |
211 | return 0; |
212 | } | |
213 | EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data); | |
214 | ||
f019d514 ID |
215 | static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry) |
216 | { | |
217 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
218 | ||
219 | if (__test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) | |
220 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
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 | ||
95ea3627 ID |
260 | /* |
261 | * RX data handlers. | |
262 | */ | |
263 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
264 | { | |
181d6902 ID |
265 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
266 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
95ea3627 | 267 | struct sk_buff *skb; |
181d6902 ID |
268 | struct skb_frame_desc *skbdesc; |
269 | struct rxdone_entry_desc rxdesc; | |
a26cbc65 | 270 | u8 rxd[32]; |
95ea3627 ID |
271 | |
272 | if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || | |
181d6902 | 273 | !test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
274 | return; |
275 | ||
276 | /* | |
277 | * Check if the received data is simply too small | |
278 | * to be actually valid, or if the urb is signaling | |
279 | * a problem. | |
280 | */ | |
181d6902 | 281 | if (urb->actual_length < entry->queue->desc_size || urb->status) |
95ea3627 ID |
282 | goto skip_entry; |
283 | ||
40561b84 ID |
284 | /* |
285 | * Fill in skb descriptor | |
286 | */ | |
181d6902 ID |
287 | skbdesc = get_skb_frame_desc(entry->skb); |
288 | memset(skbdesc, 0, sizeof(*skbdesc)); | |
40561b84 | 289 | skbdesc->entry = entry; |
a26cbc65 GW |
290 | skbdesc->desc = rxd; |
291 | skbdesc->desc_len = entry->queue->desc_size; | |
40561b84 | 292 | |
181d6902 ID |
293 | memset(&rxdesc, 0, sizeof(rxdesc)); |
294 | rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); | |
95ea3627 ID |
295 | |
296 | /* | |
297 | * Allocate a new sk buffer to replace the current one. | |
298 | * If allocation fails, we should drop the current frame | |
299 | * so we can recycle the existing sk buffer for the new frame. | |
300 | */ | |
239c249d | 301 | skb = rt2x00queue_alloc_rxskb(entry->queue); |
95ea3627 ID |
302 | if (!skb) |
303 | goto skip_entry; | |
304 | ||
95ea3627 ID |
305 | /* |
306 | * Send the frame to rt2x00lib for further processing. | |
307 | */ | |
181d6902 | 308 | rt2x00lib_rxdone(entry, &rxdesc); |
95ea3627 ID |
309 | |
310 | /* | |
311 | * Replace current entry's skb with the newly allocated one, | |
312 | * and reinitialize the urb. | |
313 | */ | |
314 | entry->skb = skb; | |
315 | urb->transfer_buffer = entry->skb->data; | |
316 | urb->transfer_buffer_length = entry->skb->len; | |
317 | ||
318 | skip_entry: | |
181d6902 ID |
319 | if (test_bit(DEVICE_ENABLED_RADIO, &entry->queue->rt2x00dev->flags)) { |
320 | __set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); | |
95ea3627 ID |
321 | usb_submit_urb(urb, GFP_ATOMIC); |
322 | } | |
323 | ||
181d6902 | 324 | rt2x00queue_index_inc(entry->queue, Q_INDEX); |
95ea3627 ID |
325 | } |
326 | ||
327 | /* | |
328 | * Radio handlers | |
329 | */ | |
95ea3627 ID |
330 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
331 | { | |
b8be63ff ID |
332 | struct queue_entry_priv_usb *entry_priv; |
333 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
334 | unsigned int i; |
335 | ||
bd394a74 | 336 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 ID |
337 | REGISTER_TIMEOUT); |
338 | ||
339 | /* | |
181d6902 | 340 | * Cancel all queues. |
95ea3627 | 341 | */ |
181d6902 | 342 | for (i = 0; i < rt2x00dev->rx->limit; i++) { |
b8be63ff ID |
343 | entry_priv = rt2x00dev->rx->entries[i].priv_data; |
344 | usb_kill_urb(entry_priv->urb); | |
95ea3627 | 345 | } |
330e3f95 | 346 | |
b8be63ff | 347 | /* |
edfa78b2 | 348 | * Kill guardian urb (if required by driver). |
b8be63ff | 349 | */ |
edfa78b2 ID |
350 | if (!test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) |
351 | return; | |
352 | ||
330e3f95 | 353 | for (i = 0; i < rt2x00dev->bcn->limit; i++) { |
b8be63ff ID |
354 | bcn_priv = rt2x00dev->bcn->entries[i].priv_data; |
355 | if (bcn_priv->guardian_urb) | |
356 | usb_kill_urb(bcn_priv->guardian_urb); | |
330e3f95 | 357 | } |
95ea3627 ID |
358 | } |
359 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
360 | ||
361 | /* | |
362 | * Device initialization handlers. | |
363 | */ | |
837e7f24 | 364 | void rt2x00usb_init_rxentry(struct rt2x00_dev *rt2x00dev, |
181d6902 | 365 | struct queue_entry *entry) |
837e7f24 | 366 | { |
181d6902 | 367 | struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev); |
b8be63ff | 368 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
837e7f24 | 369 | |
b8be63ff | 370 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
837e7f24 ID |
371 | usb_rcvbulkpipe(usb_dev, 1), |
372 | entry->skb->data, entry->skb->len, | |
373 | rt2x00usb_interrupt_rxdone, entry); | |
374 | ||
181d6902 | 375 | __set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
b8be63ff | 376 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
837e7f24 ID |
377 | } |
378 | EXPORT_SYMBOL_GPL(rt2x00usb_init_rxentry); | |
379 | ||
380 | void rt2x00usb_init_txentry(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 381 | struct queue_entry *entry) |
837e7f24 ID |
382 | { |
383 | entry->flags = 0; | |
384 | } | |
385 | EXPORT_SYMBOL_GPL(rt2x00usb_init_txentry); | |
386 | ||
95ea3627 | 387 | static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, |
181d6902 | 388 | struct data_queue *queue) |
95ea3627 | 389 | { |
b8be63ff ID |
390 | struct queue_entry_priv_usb *entry_priv; |
391 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
392 | unsigned int i; |
393 | ||
b8be63ff ID |
394 | for (i = 0; i < queue->limit; i++) { |
395 | entry_priv = queue->entries[i].priv_data; | |
396 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
397 | if (!entry_priv->urb) | |
398 | return -ENOMEM; | |
399 | } | |
400 | ||
95ea3627 | 401 | /* |
b8be63ff ID |
402 | * If this is not the beacon queue or |
403 | * no guardian byte was required for the beacon, | |
404 | * then we are done. | |
95ea3627 | 405 | */ |
b8be63ff ID |
406 | if (rt2x00dev->bcn != queue || |
407 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
408 | return 0; | |
409 | ||
181d6902 | 410 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
411 | bcn_priv = queue->entries[i].priv_data; |
412 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
413 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
414 | return -ENOMEM; |
415 | } | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
420 | static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 421 | struct data_queue *queue) |
95ea3627 | 422 | { |
b8be63ff ID |
423 | struct queue_entry_priv_usb *entry_priv; |
424 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
425 | unsigned int i; |
426 | ||
181d6902 | 427 | if (!queue->entries) |
95ea3627 ID |
428 | return; |
429 | ||
181d6902 | 430 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
431 | entry_priv = queue->entries[i].priv_data; |
432 | usb_kill_urb(entry_priv->urb); | |
433 | usb_free_urb(entry_priv->urb); | |
181d6902 ID |
434 | if (queue->entries[i].skb) |
435 | kfree_skb(queue->entries[i].skb); | |
95ea3627 | 436 | } |
b8be63ff ID |
437 | |
438 | /* | |
439 | * If this is not the beacon queue or | |
440 | * no guardian byte was required for the beacon, | |
441 | * then we are done. | |
442 | */ | |
443 | if (rt2x00dev->bcn != queue || | |
444 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
445 | return; | |
446 | ||
447 | for (i = 0; i < queue->limit; i++) { | |
448 | bcn_priv = queue->entries[i].priv_data; | |
449 | usb_kill_urb(bcn_priv->guardian_urb); | |
450 | usb_free_urb(bcn_priv->guardian_urb); | |
451 | } | |
95ea3627 ID |
452 | } |
453 | ||
454 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
455 | { | |
181d6902 | 456 | struct data_queue *queue; |
95ea3627 ID |
457 | struct sk_buff *skb; |
458 | unsigned int entry_size; | |
459 | unsigned int i; | |
73738001 | 460 | int uninitialized_var(status); |
95ea3627 ID |
461 | |
462 | /* | |
463 | * Allocate DMA | |
464 | */ | |
181d6902 ID |
465 | queue_for_each(rt2x00dev, queue) { |
466 | status = rt2x00usb_alloc_urb(rt2x00dev, queue); | |
95ea3627 ID |
467 | if (status) |
468 | goto exit; | |
469 | } | |
470 | ||
471 | /* | |
181d6902 | 472 | * For the RX queue, skb's should be allocated. |
95ea3627 ID |
473 | */ |
474 | entry_size = rt2x00dev->rx->data_size + rt2x00dev->rx->desc_size; | |
181d6902 | 475 | for (i = 0; i < rt2x00dev->rx->limit; i++) { |
239c249d | 476 | skb = rt2x00queue_alloc_rxskb(rt2x00dev->rx); |
95ea3627 ID |
477 | if (!skb) |
478 | goto exit; | |
479 | ||
181d6902 | 480 | rt2x00dev->rx->entries[i].skb = skb; |
95ea3627 ID |
481 | } |
482 | ||
483 | return 0; | |
484 | ||
485 | exit: | |
486 | rt2x00usb_uninitialize(rt2x00dev); | |
487 | ||
488 | return status; | |
489 | } | |
490 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
491 | ||
492 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
493 | { | |
181d6902 | 494 | struct data_queue *queue; |
95ea3627 | 495 | |
181d6902 ID |
496 | queue_for_each(rt2x00dev, queue) |
497 | rt2x00usb_free_urb(rt2x00dev, queue); | |
95ea3627 ID |
498 | } |
499 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
500 | ||
501 | /* | |
502 | * USB driver handlers. | |
503 | */ | |
504 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
505 | { | |
506 | kfree(rt2x00dev->rf); | |
507 | rt2x00dev->rf = NULL; | |
508 | ||
509 | kfree(rt2x00dev->eeprom); | |
510 | rt2x00dev->eeprom = NULL; | |
511 | ||
21795094 ID |
512 | kfree(rt2x00dev->csr.cache); |
513 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
514 | } |
515 | ||
516 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
517 | { | |
21795094 ID |
518 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
519 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
520 | goto exit; |
521 | ||
522 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
523 | if (!rt2x00dev->eeprom) | |
524 | goto exit; | |
525 | ||
526 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
527 | if (!rt2x00dev->rf) | |
528 | goto exit; | |
529 | ||
530 | return 0; | |
531 | ||
532 | exit: | |
533 | ERROR_PROBE("Failed to allocate registers.\n"); | |
534 | ||
535 | rt2x00usb_free_reg(rt2x00dev); | |
536 | ||
537 | return -ENOMEM; | |
538 | } | |
539 | ||
540 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
541 | const struct usb_device_id *id) | |
542 | { | |
543 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
544 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; | |
545 | struct ieee80211_hw *hw; | |
546 | struct rt2x00_dev *rt2x00dev; | |
547 | int retval; | |
548 | ||
549 | usb_dev = usb_get_dev(usb_dev); | |
550 | ||
551 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
552 | if (!hw) { | |
553 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
554 | retval = -ENOMEM; | |
555 | goto exit_put_device; | |
556 | } | |
557 | ||
558 | usb_set_intfdata(usb_intf, hw); | |
559 | ||
560 | rt2x00dev = hw->priv; | |
561 | rt2x00dev->dev = usb_intf; | |
562 | rt2x00dev->ops = ops; | |
563 | rt2x00dev->hw = hw; | |
3d82346c | 564 | mutex_init(&rt2x00dev->usb_cache_mutex); |
95ea3627 | 565 | |
b242e891 ID |
566 | rt2x00dev->usb_maxpacket = |
567 | usb_maxpacket(usb_dev, usb_sndbulkpipe(usb_dev, 1), 1); | |
568 | if (!rt2x00dev->usb_maxpacket) | |
569 | rt2x00dev->usb_maxpacket = 1; | |
570 | ||
95ea3627 ID |
571 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
572 | if (retval) | |
573 | goto exit_free_device; | |
574 | ||
575 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
576 | if (retval) | |
577 | goto exit_free_reg; | |
578 | ||
579 | return 0; | |
580 | ||
581 | exit_free_reg: | |
582 | rt2x00usb_free_reg(rt2x00dev); | |
583 | ||
584 | exit_free_device: | |
585 | ieee80211_free_hw(hw); | |
586 | ||
587 | exit_put_device: | |
588 | usb_put_dev(usb_dev); | |
589 | ||
590 | usb_set_intfdata(usb_intf, NULL); | |
591 | ||
592 | return retval; | |
593 | } | |
594 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
595 | ||
596 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
597 | { | |
598 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
599 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
600 | ||
601 | /* | |
602 | * Free all allocated data. | |
603 | */ | |
604 | rt2x00lib_remove_dev(rt2x00dev); | |
605 | rt2x00usb_free_reg(rt2x00dev); | |
606 | ieee80211_free_hw(hw); | |
607 | ||
608 | /* | |
609 | * Free the USB device data. | |
610 | */ | |
611 | usb_set_intfdata(usb_intf, NULL); | |
612 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
613 | } | |
614 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
615 | ||
616 | #ifdef CONFIG_PM | |
617 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
618 | { | |
619 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
620 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
621 | int retval; | |
622 | ||
623 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
624 | if (retval) | |
625 | return retval; | |
626 | ||
627 | rt2x00usb_free_reg(rt2x00dev); | |
628 | ||
629 | /* | |
630 | * Decrease usbdev refcount. | |
631 | */ | |
632 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
633 | ||
634 | return 0; | |
635 | } | |
636 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
637 | ||
638 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
639 | { | |
640 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
641 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
642 | int retval; | |
643 | ||
644 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
645 | ||
646 | retval = rt2x00usb_alloc_reg(rt2x00dev); | |
647 | if (retval) | |
648 | return retval; | |
649 | ||
650 | retval = rt2x00lib_resume(rt2x00dev); | |
651 | if (retval) | |
652 | goto exit_free_reg; | |
653 | ||
654 | return 0; | |
655 | ||
656 | exit_free_reg: | |
657 | rt2x00usb_free_reg(rt2x00dev); | |
658 | ||
659 | return retval; | |
660 | } | |
661 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
662 | #endif /* CONFIG_PM */ | |
663 | ||
664 | /* | |
181d6902 | 665 | * rt2x00usb module information. |
95ea3627 ID |
666 | */ |
667 | MODULE_AUTHOR(DRV_PROJECT); | |
668 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 669 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 670 | MODULE_LICENSE("GPL"); |