Commit | Line | Data |
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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> | |
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 | ||
66f84d65 SC |
50 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
51 | return -ENODEV; | |
3d82346c | 52 | |
95ea3627 ID |
53 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
54 | status = usb_control_msg(usb_dev, pipe, request, requesttype, | |
55 | value, offset, buffer, buffer_length, | |
56 | timeout); | |
57 | if (status >= 0) | |
58 | return 0; | |
59 | ||
60 | /* | |
e9136550 | 61 | * Check for errors |
95ea3627 | 62 | * -ENODEV: Device has disappeared, no point continuing. |
e9136550 | 63 | * All other errors: Try again. |
95ea3627 | 64 | */ |
66f84d65 SC |
65 | else if (status == -ENODEV) { |
66 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
95ea3627 | 67 | break; |
66f84d65 | 68 | } |
95ea3627 ID |
69 | } |
70 | ||
71 | ERROR(rt2x00dev, | |
72 | "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n", | |
73 | request, offset, status); | |
74 | ||
75 | return status; | |
76 | } | |
77 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request); | |
78 | ||
3d82346c AB |
79 | int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev, |
80 | const u8 request, const u8 requesttype, | |
81 | const u16 offset, void *buffer, | |
82 | const u16 buffer_length, const int timeout) | |
95ea3627 ID |
83 | { |
84 | int status; | |
85 | ||
8ff48a8b | 86 | BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex)); |
3d82346c | 87 | |
95ea3627 ID |
88 | /* |
89 | * Check for Cache availability. | |
90 | */ | |
21795094 | 91 | if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) { |
95ea3627 ID |
92 | ERROR(rt2x00dev, "CSR cache not available.\n"); |
93 | return -ENOMEM; | |
94 | } | |
95 | ||
96 | if (requesttype == USB_VENDOR_REQUEST_OUT) | |
21795094 | 97 | memcpy(rt2x00dev->csr.cache, buffer, buffer_length); |
95ea3627 ID |
98 | |
99 | status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype, | |
21795094 | 100 | offset, 0, rt2x00dev->csr.cache, |
95ea3627 ID |
101 | buffer_length, timeout); |
102 | ||
103 | if (!status && requesttype == USB_VENDOR_REQUEST_IN) | |
21795094 | 104 | memcpy(buffer, rt2x00dev->csr.cache, buffer_length); |
95ea3627 ID |
105 | |
106 | return status; | |
107 | } | |
3d82346c AB |
108 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock); |
109 | ||
110 | int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev, | |
111 | const u8 request, const u8 requesttype, | |
112 | const u16 offset, void *buffer, | |
113 | const u16 buffer_length, const int timeout) | |
114 | { | |
115 | int status; | |
116 | ||
8ff48a8b | 117 | mutex_lock(&rt2x00dev->csr_mutex); |
3d82346c AB |
118 | |
119 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
120 | requesttype, offset, buffer, | |
121 | buffer_length, timeout); | |
122 | ||
8ff48a8b | 123 | mutex_unlock(&rt2x00dev->csr_mutex); |
3d82346c AB |
124 | |
125 | return status; | |
126 | } | |
95ea3627 ID |
127 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff); |
128 | ||
ed0dbeeb IM |
129 | int rt2x00usb_vendor_request_large_buff(struct rt2x00_dev *rt2x00dev, |
130 | const u8 request, const u8 requesttype, | |
82f97b8d | 131 | const u16 offset, const void *buffer, |
ed0dbeeb IM |
132 | const u16 buffer_length, |
133 | const int timeout) | |
134 | { | |
135 | int status = 0; | |
136 | unsigned char *tb; | |
137 | u16 off, len, bsize; | |
138 | ||
8ff48a8b | 139 | mutex_lock(&rt2x00dev->csr_mutex); |
ed0dbeeb | 140 | |
82f97b8d | 141 | tb = (char *)buffer; |
ed0dbeeb IM |
142 | off = offset; |
143 | len = buffer_length; | |
144 | while (len && !status) { | |
145 | bsize = min_t(u16, CSR_CACHE_SIZE, len); | |
146 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
147 | requesttype, off, tb, | |
148 | bsize, timeout); | |
149 | ||
150 | tb += bsize; | |
151 | len -= bsize; | |
152 | off += bsize; | |
153 | } | |
154 | ||
8ff48a8b | 155 | mutex_unlock(&rt2x00dev->csr_mutex); |
ed0dbeeb IM |
156 | |
157 | return status; | |
158 | } | |
159 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_large_buff); | |
160 | ||
0f829b1d ID |
161 | int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev, |
162 | const unsigned int offset, | |
f255b92b | 163 | const struct rt2x00_field32 field, |
0f829b1d ID |
164 | u32 *reg) |
165 | { | |
166 | unsigned int i; | |
167 | ||
66f84d65 SC |
168 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
169 | return -ENODEV; | |
170 | ||
0f829b1d ID |
171 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
172 | rt2x00usb_register_read_lock(rt2x00dev, offset, reg); | |
173 | if (!rt2x00_get_field32(*reg, field)) | |
174 | return 1; | |
175 | udelay(REGISTER_BUSY_DELAY); | |
176 | } | |
177 | ||
178 | ERROR(rt2x00dev, "Indirect register access failed: " | |
179 | "offset=0x%.08x, value=0x%.08x\n", offset, *reg); | |
180 | *reg = ~0; | |
181 | ||
182 | return 0; | |
183 | } | |
184 | EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read); | |
185 | ||
95ea3627 ID |
186 | /* |
187 | * TX data handlers. | |
188 | */ | |
189 | static void rt2x00usb_interrupt_txdone(struct urb *urb) | |
190 | { | |
181d6902 ID |
191 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
192 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
181d6902 | 193 | struct txdone_entry_desc txdesc; |
95ea3627 | 194 | |
0262ab0d | 195 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 196 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
197 | return; |
198 | ||
95ea3627 ID |
199 | /* |
200 | * Obtain the status about this packet. | |
fb55f4d1 ID |
201 | * Note that when the status is 0 it does not mean the |
202 | * frame was send out correctly. It only means the frame | |
203 | * was succesfully pushed to the hardware, we have no | |
204 | * way to determine the transmission status right now. | |
205 | * (Only indirectly by looking at the failed TX counters | |
206 | * in the register). | |
95ea3627 | 207 | */ |
f126cba4 | 208 | txdesc.flags = 0; |
fb55f4d1 ID |
209 | if (!urb->status) |
210 | __set_bit(TXDONE_UNKNOWN, &txdesc.flags); | |
211 | else | |
212 | __set_bit(TXDONE_FAILURE, &txdesc.flags); | |
181d6902 | 213 | txdesc.retry = 0; |
95ea3627 | 214 | |
181d6902 | 215 | rt2x00lib_txdone(entry, &txdesc); |
95ea3627 ID |
216 | } |
217 | ||
6db3786a | 218 | int rt2x00usb_write_tx_data(struct queue_entry *entry) |
95ea3627 | 219 | { |
6db3786a | 220 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
c1d35dfa | 221 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
b8be63ff | 222 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
181d6902 | 223 | struct skb_frame_desc *skbdesc; |
dd9fa2d2 | 224 | u32 length; |
95ea3627 | 225 | |
95ea3627 ID |
226 | /* |
227 | * Add the descriptor in front of the skb. | |
228 | */ | |
6db3786a ID |
229 | skb_push(entry->skb, entry->queue->desc_size); |
230 | memset(entry->skb->data, 0, entry->queue->desc_size); | |
95ea3627 | 231 | |
08992f7f ID |
232 | /* |
233 | * Fill in skb descriptor | |
234 | */ | |
6db3786a | 235 | skbdesc = get_skb_frame_desc(entry->skb); |
6db3786a ID |
236 | skbdesc->desc = entry->skb->data; |
237 | skbdesc->desc_len = entry->queue->desc_size; | |
08992f7f | 238 | |
95ea3627 | 239 | /* |
dd9fa2d2 ID |
240 | * USB devices cannot blindly pass the skb->len as the |
241 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
242 | * to the driver to determine what the length should be. | |
95ea3627 | 243 | */ |
f1ca2167 | 244 | length = rt2x00dev->ops->lib->get_tx_data_len(entry); |
95ea3627 | 245 | |
6db3786a | 246 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
f1ca2167 | 247 | usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), |
6db3786a ID |
248 | entry->skb->data, length, |
249 | rt2x00usb_interrupt_txdone, entry); | |
95ea3627 | 250 | |
1abc3656 MN |
251 | /* |
252 | * Make sure the skb->data pointer points to the frame, not the | |
253 | * descriptor. | |
254 | */ | |
255 | skb_pull(entry->skb, entry->queue->desc_size); | |
256 | ||
95ea3627 ID |
257 | return 0; |
258 | } | |
259 | EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data); | |
260 | ||
f019d514 ID |
261 | static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry) |
262 | { | |
263 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
264 | ||
0262ab0d | 265 | if (test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) |
f019d514 ID |
266 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
267 | } | |
268 | ||
269 | void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, | |
270 | const enum data_queue_qid qid) | |
271 | { | |
272 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
273 | unsigned long irqflags; | |
274 | unsigned int index; | |
275 | unsigned int index_done; | |
276 | unsigned int i; | |
277 | ||
278 | /* | |
279 | * Only protect the range we are going to loop over, | |
280 | * if during our loop a extra entry is set to pending | |
281 | * it should not be kicked during this run, since it | |
282 | * is part of another TX operation. | |
283 | */ | |
284 | spin_lock_irqsave(&queue->lock, irqflags); | |
285 | index = queue->index[Q_INDEX]; | |
286 | index_done = queue->index[Q_INDEX_DONE]; | |
287 | spin_unlock_irqrestore(&queue->lock, irqflags); | |
288 | ||
289 | /* | |
290 | * Start from the TX done pointer, this guarentees that we will | |
291 | * send out all frames in the correct order. | |
292 | */ | |
293 | if (index_done < index) { | |
294 | for (i = index_done; i < index; i++) | |
295 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
296 | } else { | |
297 | for (i = index_done; i < queue->limit; i++) | |
298 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
299 | ||
300 | for (i = 0; i < index; i++) | |
301 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
302 | } | |
303 | } | |
304 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue); | |
305 | ||
a2c9b652 ID |
306 | void rt2x00usb_kill_tx_queue(struct rt2x00_dev *rt2x00dev, |
307 | const enum data_queue_qid qid) | |
308 | { | |
309 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
310 | struct queue_entry_priv_usb *entry_priv; | |
311 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
312 | unsigned int i; | |
313 | bool kill_guard; | |
314 | ||
315 | /* | |
316 | * When killing the beacon queue, we must also kill | |
317 | * the beacon guard byte. | |
318 | */ | |
319 | kill_guard = | |
320 | (qid == QID_BEACON) && | |
321 | (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)); | |
322 | ||
323 | /* | |
324 | * Cancel all entries. | |
325 | */ | |
326 | for (i = 0; i < queue->limit; i++) { | |
327 | entry_priv = queue->entries[i].priv_data; | |
328 | usb_kill_urb(entry_priv->urb); | |
329 | ||
330 | /* | |
331 | * Kill guardian urb (if required by driver). | |
332 | */ | |
333 | if (kill_guard) { | |
334 | bcn_priv = queue->entries[i].priv_data; | |
335 | usb_kill_urb(bcn_priv->guardian_urb); | |
336 | } | |
337 | } | |
338 | } | |
339 | EXPORT_SYMBOL_GPL(rt2x00usb_kill_tx_queue); | |
340 | ||
95ea3627 ID |
341 | /* |
342 | * RX data handlers. | |
343 | */ | |
344 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
345 | { | |
181d6902 ID |
346 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
347 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
c4da0048 | 348 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
a26cbc65 | 349 | u8 rxd[32]; |
95ea3627 | 350 | |
0262ab0d | 351 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 352 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
353 | return; |
354 | ||
355 | /* | |
356 | * Check if the received data is simply too small | |
357 | * to be actually valid, or if the urb is signaling | |
358 | * a problem. | |
359 | */ | |
d74f5ba4 | 360 | if (urb->actual_length < entry->queue->desc_size || urb->status) { |
0262ab0d | 361 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
d74f5ba4 ID |
362 | usb_submit_urb(urb, GFP_ATOMIC); |
363 | return; | |
364 | } | |
95ea3627 | 365 | |
40561b84 | 366 | /* |
c4da0048 | 367 | * Fill in desc fields of the skb descriptor |
40561b84 | 368 | */ |
a26cbc65 GW |
369 | skbdesc->desc = rxd; |
370 | skbdesc->desc_len = entry->queue->desc_size; | |
40561b84 | 371 | |
95ea3627 ID |
372 | /* |
373 | * Send the frame to rt2x00lib for further processing. | |
374 | */ | |
c4da0048 | 375 | rt2x00lib_rxdone(rt2x00dev, entry); |
95ea3627 ID |
376 | } |
377 | ||
378 | /* | |
379 | * Radio handlers | |
380 | */ | |
95ea3627 ID |
381 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
382 | { | |
bd394a74 | 383 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 ID |
384 | REGISTER_TIMEOUT); |
385 | ||
386 | /* | |
a2c9b652 ID |
387 | * The USB version of kill_tx_queue also works |
388 | * on the RX queue. | |
b8be63ff | 389 | */ |
a2c9b652 | 390 | rt2x00dev->ops->lib->kill_tx_queue(rt2x00dev, QID_RX); |
95ea3627 ID |
391 | } |
392 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
393 | ||
394 | /* | |
395 | * Device initialization handlers. | |
396 | */ | |
798b7adb | 397 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 398 | { |
798b7adb ID |
399 | struct usb_device *usb_dev = |
400 | to_usb_device_intf(entry->queue->rt2x00dev->dev); | |
b8be63ff | 401 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
f1ca2167 | 402 | int pipe; |
837e7f24 | 403 | |
798b7adb | 404 | if (entry->queue->qid == QID_RX) { |
f1ca2167 ID |
405 | pipe = usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint); |
406 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, pipe, | |
798b7adb ID |
407 | entry->skb->data, entry->skb->len, |
408 | rt2x00usb_interrupt_rxdone, entry); | |
837e7f24 | 409 | |
798b7adb ID |
410 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
411 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
412 | } else { | |
413 | entry->flags = 0; | |
414 | } | |
837e7f24 | 415 | } |
798b7adb | 416 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 417 | |
f1ca2167 ID |
418 | static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
419 | struct usb_endpoint_descriptor *ep_desc) | |
420 | { | |
421 | struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); | |
422 | int pipe; | |
423 | ||
424 | queue->usb_endpoint = usb_endpoint_num(ep_desc); | |
425 | ||
426 | if (queue->qid == QID_RX) { | |
427 | pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); | |
428 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); | |
429 | } else { | |
430 | pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); | |
431 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); | |
432 | } | |
433 | ||
434 | if (!queue->usb_maxpacket) | |
435 | queue->usb_maxpacket = 1; | |
436 | } | |
437 | ||
438 | static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) | |
439 | { | |
440 | struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); | |
441 | struct usb_host_interface *intf_desc = intf->cur_altsetting; | |
442 | struct usb_endpoint_descriptor *ep_desc; | |
443 | struct data_queue *queue = rt2x00dev->tx; | |
444 | struct usb_endpoint_descriptor *tx_ep_desc = NULL; | |
445 | unsigned int i; | |
446 | ||
447 | /* | |
448 | * Walk through all available endpoints to search for "bulk in" | |
449 | * and "bulk out" endpoints. When we find such endpoints collect | |
450 | * the information we need from the descriptor and assign it | |
451 | * to the queue. | |
452 | */ | |
453 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
454 | ep_desc = &intf_desc->endpoint[i].desc; | |
455 | ||
456 | if (usb_endpoint_is_bulk_in(ep_desc)) { | |
457 | rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); | |
d15cfc3a ID |
458 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
459 | (queue != queue_end(rt2x00dev))) { | |
f1ca2167 | 460 | rt2x00usb_assign_endpoint(queue, ep_desc); |
d15cfc3a | 461 | queue = queue_next(queue); |
f1ca2167 | 462 | |
f1ca2167 ID |
463 | tx_ep_desc = ep_desc; |
464 | } | |
465 | } | |
466 | ||
467 | /* | |
468 | * At least 1 endpoint for RX and 1 endpoint for TX must be available. | |
469 | */ | |
470 | if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { | |
471 | ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); | |
472 | return -EPIPE; | |
473 | } | |
474 | ||
475 | /* | |
476 | * It might be possible not all queues have a dedicated endpoint. | |
477 | * Loop through all TX queues and copy the endpoint information | |
478 | * which we have gathered from already assigned endpoints. | |
479 | */ | |
480 | txall_queue_for_each(rt2x00dev, queue) { | |
481 | if (!queue->usb_endpoint) | |
482 | rt2x00usb_assign_endpoint(queue, tx_ep_desc); | |
483 | } | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
95ea3627 | 488 | static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, |
181d6902 | 489 | struct data_queue *queue) |
95ea3627 | 490 | { |
b8be63ff ID |
491 | struct queue_entry_priv_usb *entry_priv; |
492 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
493 | unsigned int i; |
494 | ||
b8be63ff ID |
495 | for (i = 0; i < queue->limit; i++) { |
496 | entry_priv = queue->entries[i].priv_data; | |
497 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
498 | if (!entry_priv->urb) | |
499 | return -ENOMEM; | |
500 | } | |
501 | ||
95ea3627 | 502 | /* |
b8be63ff ID |
503 | * If this is not the beacon queue or |
504 | * no guardian byte was required for the beacon, | |
505 | * then we are done. | |
95ea3627 | 506 | */ |
b8be63ff ID |
507 | if (rt2x00dev->bcn != queue || |
508 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
509 | return 0; | |
510 | ||
181d6902 | 511 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
512 | bcn_priv = queue->entries[i].priv_data; |
513 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
514 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
515 | return -ENOMEM; |
516 | } | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 522 | struct data_queue *queue) |
95ea3627 | 523 | { |
b8be63ff ID |
524 | struct queue_entry_priv_usb *entry_priv; |
525 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
526 | unsigned int i; |
527 | ||
181d6902 | 528 | if (!queue->entries) |
95ea3627 ID |
529 | return; |
530 | ||
181d6902 | 531 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
532 | entry_priv = queue->entries[i].priv_data; |
533 | usb_kill_urb(entry_priv->urb); | |
534 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 535 | } |
b8be63ff ID |
536 | |
537 | /* | |
538 | * If this is not the beacon queue or | |
539 | * no guardian byte was required for the beacon, | |
540 | * then we are done. | |
541 | */ | |
542 | if (rt2x00dev->bcn != queue || | |
543 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
544 | return; | |
545 | ||
546 | for (i = 0; i < queue->limit; i++) { | |
547 | bcn_priv = queue->entries[i].priv_data; | |
548 | usb_kill_urb(bcn_priv->guardian_urb); | |
549 | usb_free_urb(bcn_priv->guardian_urb); | |
550 | } | |
95ea3627 ID |
551 | } |
552 | ||
553 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
554 | { | |
181d6902 | 555 | struct data_queue *queue; |
30caa6e3 | 556 | int status; |
95ea3627 | 557 | |
f1ca2167 ID |
558 | /* |
559 | * Find endpoints for each queue | |
560 | */ | |
561 | status = rt2x00usb_find_endpoints(rt2x00dev); | |
562 | if (status) | |
563 | goto exit; | |
564 | ||
95ea3627 ID |
565 | /* |
566 | * Allocate DMA | |
567 | */ | |
181d6902 ID |
568 | queue_for_each(rt2x00dev, queue) { |
569 | status = rt2x00usb_alloc_urb(rt2x00dev, queue); | |
95ea3627 ID |
570 | if (status) |
571 | goto exit; | |
572 | } | |
573 | ||
95ea3627 ID |
574 | return 0; |
575 | ||
576 | exit: | |
577 | rt2x00usb_uninitialize(rt2x00dev); | |
578 | ||
579 | return status; | |
580 | } | |
581 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
582 | ||
583 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
584 | { | |
181d6902 | 585 | struct data_queue *queue; |
95ea3627 | 586 | |
181d6902 ID |
587 | queue_for_each(rt2x00dev, queue) |
588 | rt2x00usb_free_urb(rt2x00dev, queue); | |
95ea3627 ID |
589 | } |
590 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
591 | ||
592 | /* | |
593 | * USB driver handlers. | |
594 | */ | |
595 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
596 | { | |
597 | kfree(rt2x00dev->rf); | |
598 | rt2x00dev->rf = NULL; | |
599 | ||
600 | kfree(rt2x00dev->eeprom); | |
601 | rt2x00dev->eeprom = NULL; | |
602 | ||
21795094 ID |
603 | kfree(rt2x00dev->csr.cache); |
604 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
605 | } |
606 | ||
607 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
608 | { | |
21795094 ID |
609 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
610 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
611 | goto exit; |
612 | ||
613 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
614 | if (!rt2x00dev->eeprom) | |
615 | goto exit; | |
616 | ||
617 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
618 | if (!rt2x00dev->rf) | |
619 | goto exit; | |
620 | ||
621 | return 0; | |
622 | ||
623 | exit: | |
624 | ERROR_PROBE("Failed to allocate registers.\n"); | |
625 | ||
626 | rt2x00usb_free_reg(rt2x00dev); | |
627 | ||
628 | return -ENOMEM; | |
629 | } | |
630 | ||
631 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
632 | const struct usb_device_id *id) | |
633 | { | |
634 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
635 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; | |
636 | struct ieee80211_hw *hw; | |
637 | struct rt2x00_dev *rt2x00dev; | |
638 | int retval; | |
639 | ||
640 | usb_dev = usb_get_dev(usb_dev); | |
641 | ||
642 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
643 | if (!hw) { | |
644 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
645 | retval = -ENOMEM; | |
646 | goto exit_put_device; | |
647 | } | |
648 | ||
649 | usb_set_intfdata(usb_intf, hw); | |
650 | ||
651 | rt2x00dev = hw->priv; | |
14a3bf89 | 652 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
653 | rt2x00dev->ops = ops; |
654 | rt2x00dev->hw = hw; | |
655 | ||
2015d192 GW |
656 | rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); |
657 | ||
95ea3627 ID |
658 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
659 | if (retval) | |
660 | goto exit_free_device; | |
661 | ||
662 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
663 | if (retval) | |
664 | goto exit_free_reg; | |
665 | ||
666 | return 0; | |
667 | ||
668 | exit_free_reg: | |
669 | rt2x00usb_free_reg(rt2x00dev); | |
670 | ||
671 | exit_free_device: | |
672 | ieee80211_free_hw(hw); | |
673 | ||
674 | exit_put_device: | |
675 | usb_put_dev(usb_dev); | |
676 | ||
677 | usb_set_intfdata(usb_intf, NULL); | |
678 | ||
679 | return retval; | |
680 | } | |
681 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
682 | ||
683 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
684 | { | |
685 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
686 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
687 | ||
688 | /* | |
689 | * Free all allocated data. | |
690 | */ | |
691 | rt2x00lib_remove_dev(rt2x00dev); | |
692 | rt2x00usb_free_reg(rt2x00dev); | |
693 | ieee80211_free_hw(hw); | |
694 | ||
695 | /* | |
696 | * Free the USB device data. | |
697 | */ | |
698 | usb_set_intfdata(usb_intf, NULL); | |
699 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
700 | } | |
701 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
702 | ||
703 | #ifdef CONFIG_PM | |
704 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
705 | { | |
706 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
707 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
708 | int retval; | |
709 | ||
710 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
711 | if (retval) | |
712 | return retval; | |
713 | ||
95ea3627 ID |
714 | /* |
715 | * Decrease usbdev refcount. | |
716 | */ | |
717 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
718 | ||
719 | return 0; | |
720 | } | |
721 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
722 | ||
723 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
724 | { | |
725 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
726 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 ID |
727 | |
728 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
729 | ||
499a214c | 730 | return rt2x00lib_resume(rt2x00dev); |
95ea3627 ID |
731 | } |
732 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
733 | #endif /* CONFIG_PM */ | |
734 | ||
735 | /* | |
181d6902 | 736 | * rt2x00usb module information. |
95ea3627 ID |
737 | */ |
738 | MODULE_AUTHOR(DRV_PROJECT); | |
739 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 740 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 741 | MODULE_LICENSE("GPL"); |