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> | |
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) | |
115 | { | |
116 | int status; | |
117 | ||
8ff48a8b | 118 | mutex_lock(&rt2x00dev->csr_mutex); |
3d82346c AB |
119 | |
120 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
121 | requesttype, offset, buffer, | |
122 | buffer_length, timeout); | |
123 | ||
8ff48a8b | 124 | mutex_unlock(&rt2x00dev->csr_mutex); |
3d82346c AB |
125 | |
126 | return status; | |
127 | } | |
95ea3627 ID |
128 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff); |
129 | ||
ed0dbeeb IM |
130 | int rt2x00usb_vendor_request_large_buff(struct rt2x00_dev *rt2x00dev, |
131 | const u8 request, const u8 requesttype, | |
82f97b8d | 132 | const u16 offset, const void *buffer, |
ed0dbeeb IM |
133 | const u16 buffer_length, |
134 | const int timeout) | |
135 | { | |
136 | int status = 0; | |
137 | unsigned char *tb; | |
138 | u16 off, len, bsize; | |
139 | ||
8ff48a8b | 140 | mutex_lock(&rt2x00dev->csr_mutex); |
ed0dbeeb | 141 | |
82f97b8d | 142 | tb = (char *)buffer; |
ed0dbeeb IM |
143 | off = offset; |
144 | len = buffer_length; | |
145 | while (len && !status) { | |
146 | bsize = min_t(u16, CSR_CACHE_SIZE, len); | |
147 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
148 | requesttype, off, tb, | |
149 | bsize, timeout); | |
150 | ||
151 | tb += bsize; | |
152 | len -= bsize; | |
153 | off += bsize; | |
154 | } | |
155 | ||
8ff48a8b | 156 | mutex_unlock(&rt2x00dev->csr_mutex); |
ed0dbeeb IM |
157 | |
158 | return status; | |
159 | } | |
160 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_large_buff); | |
161 | ||
0f829b1d ID |
162 | int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev, |
163 | const unsigned int offset, | |
f255b92b | 164 | const struct rt2x00_field32 field, |
0f829b1d ID |
165 | u32 *reg) |
166 | { | |
167 | unsigned int i; | |
168 | ||
66f84d65 SC |
169 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
170 | return -ENODEV; | |
171 | ||
0f829b1d ID |
172 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
173 | rt2x00usb_register_read_lock(rt2x00dev, offset, reg); | |
174 | if (!rt2x00_get_field32(*reg, field)) | |
175 | return 1; | |
176 | udelay(REGISTER_BUSY_DELAY); | |
177 | } | |
178 | ||
179 | ERROR(rt2x00dev, "Indirect register access failed: " | |
180 | "offset=0x%.08x, value=0x%.08x\n", offset, *reg); | |
181 | *reg = ~0; | |
182 | ||
183 | return 0; | |
184 | } | |
185 | EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read); | |
186 | ||
95ea3627 ID |
187 | /* |
188 | * TX data handlers. | |
189 | */ | |
190 | static void rt2x00usb_interrupt_txdone(struct urb *urb) | |
191 | { | |
181d6902 ID |
192 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
193 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
181d6902 | 194 | struct txdone_entry_desc txdesc; |
95ea3627 | 195 | |
0262ab0d | 196 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 197 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
198 | return; |
199 | ||
95ea3627 ID |
200 | /* |
201 | * Obtain the status about this packet. | |
fb55f4d1 ID |
202 | * Note that when the status is 0 it does not mean the |
203 | * frame was send out correctly. It only means the frame | |
204 | * was succesfully pushed to the hardware, we have no | |
205 | * way to determine the transmission status right now. | |
206 | * (Only indirectly by looking at the failed TX counters | |
207 | * in the register). | |
95ea3627 | 208 | */ |
f126cba4 | 209 | txdesc.flags = 0; |
fb55f4d1 ID |
210 | if (!urb->status) |
211 | __set_bit(TXDONE_UNKNOWN, &txdesc.flags); | |
212 | else | |
213 | __set_bit(TXDONE_FAILURE, &txdesc.flags); | |
181d6902 | 214 | txdesc.retry = 0; |
95ea3627 | 215 | |
181d6902 | 216 | rt2x00lib_txdone(entry, &txdesc); |
95ea3627 ID |
217 | } |
218 | ||
6db3786a | 219 | int rt2x00usb_write_tx_data(struct queue_entry *entry) |
95ea3627 | 220 | { |
6db3786a | 221 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
c1d35dfa | 222 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
b8be63ff | 223 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
181d6902 | 224 | struct skb_frame_desc *skbdesc; |
dd9fa2d2 | 225 | u32 length; |
95ea3627 | 226 | |
95ea3627 ID |
227 | /* |
228 | * Add the descriptor in front of the skb. | |
229 | */ | |
6db3786a ID |
230 | skb_push(entry->skb, entry->queue->desc_size); |
231 | memset(entry->skb->data, 0, entry->queue->desc_size); | |
95ea3627 | 232 | |
08992f7f ID |
233 | /* |
234 | * Fill in skb descriptor | |
235 | */ | |
6db3786a | 236 | skbdesc = get_skb_frame_desc(entry->skb); |
6db3786a ID |
237 | skbdesc->desc = entry->skb->data; |
238 | skbdesc->desc_len = entry->queue->desc_size; | |
08992f7f | 239 | |
95ea3627 | 240 | /* |
dd9fa2d2 ID |
241 | * USB devices cannot blindly pass the skb->len as the |
242 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
243 | * to the driver to determine what the length should be. | |
95ea3627 | 244 | */ |
f1ca2167 | 245 | length = rt2x00dev->ops->lib->get_tx_data_len(entry); |
95ea3627 | 246 | |
6db3786a | 247 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
f1ca2167 | 248 | usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), |
6db3786a ID |
249 | entry->skb->data, length, |
250 | rt2x00usb_interrupt_txdone, entry); | |
95ea3627 | 251 | |
1abc3656 MN |
252 | /* |
253 | * Make sure the skb->data pointer points to the frame, not the | |
254 | * descriptor. | |
255 | */ | |
256 | skb_pull(entry->skb, entry->queue->desc_size); | |
257 | ||
95ea3627 ID |
258 | return 0; |
259 | } | |
260 | EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data); | |
261 | ||
f019d514 ID |
262 | static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry) |
263 | { | |
264 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
265 | ||
0262ab0d | 266 | if (test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) |
f019d514 ID |
267 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
268 | } | |
269 | ||
270 | void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, | |
271 | const enum data_queue_qid qid) | |
272 | { | |
273 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
274 | unsigned long irqflags; | |
275 | unsigned int index; | |
276 | unsigned int index_done; | |
277 | unsigned int i; | |
278 | ||
279 | /* | |
280 | * Only protect the range we are going to loop over, | |
281 | * if during our loop a extra entry is set to pending | |
282 | * it should not be kicked during this run, since it | |
283 | * is part of another TX operation. | |
284 | */ | |
285 | spin_lock_irqsave(&queue->lock, irqflags); | |
286 | index = queue->index[Q_INDEX]; | |
287 | index_done = queue->index[Q_INDEX_DONE]; | |
288 | spin_unlock_irqrestore(&queue->lock, irqflags); | |
289 | ||
290 | /* | |
291 | * Start from the TX done pointer, this guarentees that we will | |
292 | * send out all frames in the correct order. | |
293 | */ | |
294 | if (index_done < index) { | |
295 | for (i = index_done; i < index; i++) | |
296 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
297 | } else { | |
298 | for (i = index_done; i < queue->limit; i++) | |
299 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
300 | ||
301 | for (i = 0; i < index; i++) | |
302 | rt2x00usb_kick_tx_entry(&queue->entries[i]); | |
303 | } | |
304 | } | |
305 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue); | |
306 | ||
a2c9b652 ID |
307 | void rt2x00usb_kill_tx_queue(struct rt2x00_dev *rt2x00dev, |
308 | const enum data_queue_qid qid) | |
309 | { | |
310 | struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid); | |
311 | struct queue_entry_priv_usb *entry_priv; | |
312 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
313 | unsigned int i; | |
314 | bool kill_guard; | |
315 | ||
316 | /* | |
317 | * When killing the beacon queue, we must also kill | |
318 | * the beacon guard byte. | |
319 | */ | |
320 | kill_guard = | |
321 | (qid == QID_BEACON) && | |
322 | (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)); | |
323 | ||
324 | /* | |
325 | * Cancel all entries. | |
326 | */ | |
327 | for (i = 0; i < queue->limit; i++) { | |
328 | entry_priv = queue->entries[i].priv_data; | |
329 | usb_kill_urb(entry_priv->urb); | |
330 | ||
331 | /* | |
332 | * Kill guardian urb (if required by driver). | |
333 | */ | |
334 | if (kill_guard) { | |
335 | bcn_priv = queue->entries[i].priv_data; | |
336 | usb_kill_urb(bcn_priv->guardian_urb); | |
337 | } | |
338 | } | |
339 | } | |
340 | EXPORT_SYMBOL_GPL(rt2x00usb_kill_tx_queue); | |
341 | ||
95ea3627 ID |
342 | /* |
343 | * RX data handlers. | |
344 | */ | |
345 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
346 | { | |
181d6902 ID |
347 | struct queue_entry *entry = (struct queue_entry *)urb->context; |
348 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
c4da0048 | 349 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
a26cbc65 | 350 | u8 rxd[32]; |
95ea3627 | 351 | |
0262ab0d | 352 | if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) || |
d74f5ba4 | 353 | !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
95ea3627 ID |
354 | return; |
355 | ||
356 | /* | |
357 | * Check if the received data is simply too small | |
358 | * to be actually valid, or if the urb is signaling | |
359 | * a problem. | |
360 | */ | |
d74f5ba4 | 361 | if (urb->actual_length < entry->queue->desc_size || urb->status) { |
0262ab0d | 362 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
d74f5ba4 ID |
363 | usb_submit_urb(urb, GFP_ATOMIC); |
364 | return; | |
365 | } | |
95ea3627 | 366 | |
40561b84 | 367 | /* |
c4da0048 | 368 | * Fill in desc fields of the skb descriptor |
40561b84 | 369 | */ |
a26cbc65 GW |
370 | skbdesc->desc = rxd; |
371 | skbdesc->desc_len = entry->queue->desc_size; | |
40561b84 | 372 | |
95ea3627 ID |
373 | /* |
374 | * Send the frame to rt2x00lib for further processing. | |
375 | */ | |
c4da0048 | 376 | rt2x00lib_rxdone(rt2x00dev, entry); |
95ea3627 ID |
377 | } |
378 | ||
379 | /* | |
380 | * Radio handlers | |
381 | */ | |
95ea3627 ID |
382 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
383 | { | |
bd394a74 | 384 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 ID |
385 | REGISTER_TIMEOUT); |
386 | ||
387 | /* | |
a2c9b652 ID |
388 | * The USB version of kill_tx_queue also works |
389 | * on the RX queue. | |
b8be63ff | 390 | */ |
a2c9b652 | 391 | rt2x00dev->ops->lib->kill_tx_queue(rt2x00dev, QID_RX); |
95ea3627 ID |
392 | } |
393 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
394 | ||
395 | /* | |
396 | * Device initialization handlers. | |
397 | */ | |
798b7adb | 398 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 399 | { |
798b7adb ID |
400 | struct usb_device *usb_dev = |
401 | to_usb_device_intf(entry->queue->rt2x00dev->dev); | |
b8be63ff | 402 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
f1ca2167 | 403 | int pipe; |
837e7f24 | 404 | |
798b7adb | 405 | if (entry->queue->qid == QID_RX) { |
f1ca2167 ID |
406 | pipe = usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint); |
407 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, pipe, | |
798b7adb ID |
408 | entry->skb->data, entry->skb->len, |
409 | rt2x00usb_interrupt_rxdone, entry); | |
837e7f24 | 410 | |
798b7adb ID |
411 | set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
412 | usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
413 | } else { | |
414 | entry->flags = 0; | |
415 | } | |
837e7f24 | 416 | } |
798b7adb | 417 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 418 | |
f1ca2167 ID |
419 | static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
420 | struct usb_endpoint_descriptor *ep_desc) | |
421 | { | |
422 | struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); | |
423 | int pipe; | |
424 | ||
425 | queue->usb_endpoint = usb_endpoint_num(ep_desc); | |
426 | ||
427 | if (queue->qid == QID_RX) { | |
428 | pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); | |
429 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); | |
430 | } else { | |
431 | pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); | |
432 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); | |
433 | } | |
434 | ||
435 | if (!queue->usb_maxpacket) | |
436 | queue->usb_maxpacket = 1; | |
437 | } | |
438 | ||
439 | static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) | |
440 | { | |
441 | struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); | |
442 | struct usb_host_interface *intf_desc = intf->cur_altsetting; | |
443 | struct usb_endpoint_descriptor *ep_desc; | |
444 | struct data_queue *queue = rt2x00dev->tx; | |
445 | struct usb_endpoint_descriptor *tx_ep_desc = NULL; | |
446 | unsigned int i; | |
447 | ||
448 | /* | |
449 | * Walk through all available endpoints to search for "bulk in" | |
450 | * and "bulk out" endpoints. When we find such endpoints collect | |
451 | * the information we need from the descriptor and assign it | |
452 | * to the queue. | |
453 | */ | |
454 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
455 | ep_desc = &intf_desc->endpoint[i].desc; | |
456 | ||
457 | if (usb_endpoint_is_bulk_in(ep_desc)) { | |
458 | rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); | |
d15cfc3a ID |
459 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
460 | (queue != queue_end(rt2x00dev))) { | |
f1ca2167 | 461 | rt2x00usb_assign_endpoint(queue, ep_desc); |
d15cfc3a | 462 | queue = queue_next(queue); |
f1ca2167 | 463 | |
f1ca2167 ID |
464 | tx_ep_desc = ep_desc; |
465 | } | |
466 | } | |
467 | ||
468 | /* | |
469 | * At least 1 endpoint for RX and 1 endpoint for TX must be available. | |
470 | */ | |
471 | if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { | |
472 | ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); | |
473 | return -EPIPE; | |
474 | } | |
475 | ||
476 | /* | |
477 | * It might be possible not all queues have a dedicated endpoint. | |
478 | * Loop through all TX queues and copy the endpoint information | |
479 | * which we have gathered from already assigned endpoints. | |
480 | */ | |
481 | txall_queue_for_each(rt2x00dev, queue) { | |
482 | if (!queue->usb_endpoint) | |
483 | rt2x00usb_assign_endpoint(queue, tx_ep_desc); | |
484 | } | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
95ea3627 | 489 | static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev, |
181d6902 | 490 | struct data_queue *queue) |
95ea3627 | 491 | { |
b8be63ff ID |
492 | struct queue_entry_priv_usb *entry_priv; |
493 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
494 | unsigned int i; |
495 | ||
b8be63ff ID |
496 | for (i = 0; i < queue->limit; i++) { |
497 | entry_priv = queue->entries[i].priv_data; | |
498 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
499 | if (!entry_priv->urb) | |
500 | return -ENOMEM; | |
501 | } | |
502 | ||
95ea3627 | 503 | /* |
b8be63ff ID |
504 | * If this is not the beacon queue or |
505 | * no guardian byte was required for the beacon, | |
506 | * then we are done. | |
95ea3627 | 507 | */ |
b8be63ff ID |
508 | if (rt2x00dev->bcn != queue || |
509 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
510 | return 0; | |
511 | ||
181d6902 | 512 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
513 | bcn_priv = queue->entries[i].priv_data; |
514 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
515 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
516 | return -ENOMEM; |
517 | } | |
518 | ||
519 | return 0; | |
520 | } | |
521 | ||
522 | static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, | |
181d6902 | 523 | struct data_queue *queue) |
95ea3627 | 524 | { |
b8be63ff ID |
525 | struct queue_entry_priv_usb *entry_priv; |
526 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
527 | unsigned int i; |
528 | ||
181d6902 | 529 | if (!queue->entries) |
95ea3627 ID |
530 | return; |
531 | ||
181d6902 | 532 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
533 | entry_priv = queue->entries[i].priv_data; |
534 | usb_kill_urb(entry_priv->urb); | |
535 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 536 | } |
b8be63ff ID |
537 | |
538 | /* | |
539 | * If this is not the beacon queue or | |
540 | * no guardian byte was required for the beacon, | |
541 | * then we are done. | |
542 | */ | |
543 | if (rt2x00dev->bcn != queue || | |
544 | !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags)) | |
545 | return; | |
546 | ||
547 | for (i = 0; i < queue->limit; i++) { | |
548 | bcn_priv = queue->entries[i].priv_data; | |
549 | usb_kill_urb(bcn_priv->guardian_urb); | |
550 | usb_free_urb(bcn_priv->guardian_urb); | |
551 | } | |
95ea3627 ID |
552 | } |
553 | ||
554 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
555 | { | |
181d6902 | 556 | struct data_queue *queue; |
30caa6e3 | 557 | int status; |
95ea3627 | 558 | |
f1ca2167 ID |
559 | /* |
560 | * Find endpoints for each queue | |
561 | */ | |
562 | status = rt2x00usb_find_endpoints(rt2x00dev); | |
563 | if (status) | |
564 | goto exit; | |
565 | ||
95ea3627 ID |
566 | /* |
567 | * Allocate DMA | |
568 | */ | |
181d6902 ID |
569 | queue_for_each(rt2x00dev, queue) { |
570 | status = rt2x00usb_alloc_urb(rt2x00dev, queue); | |
95ea3627 ID |
571 | if (status) |
572 | goto exit; | |
573 | } | |
574 | ||
95ea3627 ID |
575 | return 0; |
576 | ||
577 | exit: | |
578 | rt2x00usb_uninitialize(rt2x00dev); | |
579 | ||
580 | return status; | |
581 | } | |
582 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
583 | ||
584 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
585 | { | |
181d6902 | 586 | struct data_queue *queue; |
95ea3627 | 587 | |
181d6902 ID |
588 | queue_for_each(rt2x00dev, queue) |
589 | rt2x00usb_free_urb(rt2x00dev, queue); | |
95ea3627 ID |
590 | } |
591 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
592 | ||
593 | /* | |
594 | * USB driver handlers. | |
595 | */ | |
596 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
597 | { | |
598 | kfree(rt2x00dev->rf); | |
599 | rt2x00dev->rf = NULL; | |
600 | ||
601 | kfree(rt2x00dev->eeprom); | |
602 | rt2x00dev->eeprom = NULL; | |
603 | ||
21795094 ID |
604 | kfree(rt2x00dev->csr.cache); |
605 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
606 | } |
607 | ||
608 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
609 | { | |
21795094 ID |
610 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
611 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
612 | goto exit; |
613 | ||
614 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
615 | if (!rt2x00dev->eeprom) | |
616 | goto exit; | |
617 | ||
618 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
619 | if (!rt2x00dev->rf) | |
620 | goto exit; | |
621 | ||
622 | return 0; | |
623 | ||
624 | exit: | |
625 | ERROR_PROBE("Failed to allocate registers.\n"); | |
626 | ||
627 | rt2x00usb_free_reg(rt2x00dev); | |
628 | ||
629 | return -ENOMEM; | |
630 | } | |
631 | ||
632 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
633 | const struct usb_device_id *id) | |
634 | { | |
635 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
636 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; | |
637 | struct ieee80211_hw *hw; | |
638 | struct rt2x00_dev *rt2x00dev; | |
639 | int retval; | |
640 | ||
641 | usb_dev = usb_get_dev(usb_dev); | |
642 | ||
643 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
644 | if (!hw) { | |
645 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
646 | retval = -ENOMEM; | |
647 | goto exit_put_device; | |
648 | } | |
649 | ||
650 | usb_set_intfdata(usb_intf, hw); | |
651 | ||
652 | rt2x00dev = hw->priv; | |
14a3bf89 | 653 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
654 | rt2x00dev->ops = ops; |
655 | rt2x00dev->hw = hw; | |
656 | ||
2015d192 GW |
657 | rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); |
658 | ||
95ea3627 ID |
659 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
660 | if (retval) | |
661 | goto exit_free_device; | |
662 | ||
663 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
664 | if (retval) | |
665 | goto exit_free_reg; | |
666 | ||
667 | return 0; | |
668 | ||
669 | exit_free_reg: | |
670 | rt2x00usb_free_reg(rt2x00dev); | |
671 | ||
672 | exit_free_device: | |
673 | ieee80211_free_hw(hw); | |
674 | ||
675 | exit_put_device: | |
676 | usb_put_dev(usb_dev); | |
677 | ||
678 | usb_set_intfdata(usb_intf, NULL); | |
679 | ||
680 | return retval; | |
681 | } | |
682 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
683 | ||
684 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
685 | { | |
686 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
687 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
688 | ||
689 | /* | |
690 | * Free all allocated data. | |
691 | */ | |
692 | rt2x00lib_remove_dev(rt2x00dev); | |
693 | rt2x00usb_free_reg(rt2x00dev); | |
694 | ieee80211_free_hw(hw); | |
695 | ||
696 | /* | |
697 | * Free the USB device data. | |
698 | */ | |
699 | usb_set_intfdata(usb_intf, NULL); | |
700 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
701 | } | |
702 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
703 | ||
704 | #ifdef CONFIG_PM | |
705 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
706 | { | |
707 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
708 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
709 | int retval; | |
710 | ||
711 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
712 | if (retval) | |
713 | return retval; | |
714 | ||
95ea3627 ID |
715 | /* |
716 | * Decrease usbdev refcount. | |
717 | */ | |
718 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
719 | ||
720 | return 0; | |
721 | } | |
722 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
723 | ||
724 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
725 | { | |
726 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
727 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 ID |
728 | |
729 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
730 | ||
499a214c | 731 | return rt2x00lib_resume(rt2x00dev); |
95ea3627 ID |
732 | } |
733 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
734 | #endif /* CONFIG_PM */ | |
735 | ||
736 | /* | |
181d6902 | 737 | * rt2x00usb module information. |
95ea3627 ID |
738 | */ |
739 | MODULE_AUTHOR(DRV_PROJECT); | |
740 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 741 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 742 | MODULE_LICENSE("GPL"); |