Commit | Line | Data |
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95ea3627 | 1 | /* |
7e613e16 ID |
2 | Copyright (C) 2010 Willow Garage <http://www.willowgarage.com> |
3 | Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> | |
95ea3627 ID |
4 | <http://rt2x00.serialmonkey.com> |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the | |
18 | Free Software Foundation, Inc., | |
19 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | /* | |
23 | Module: rt2x00usb | |
24 | Abstract: rt2x00 generic usb device routines. | |
25 | */ | |
26 | ||
95ea3627 ID |
27 | #include <linux/kernel.h> |
28 | #include <linux/module.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
95ea3627 | 30 | #include <linux/usb.h> |
3d82346c | 31 | #include <linux/bug.h> |
95ea3627 ID |
32 | |
33 | #include "rt2x00.h" | |
34 | #include "rt2x00usb.h" | |
35 | ||
36 | /* | |
37 | * Interfacing with the HW. | |
38 | */ | |
0e14f6d3 | 39 | int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev, |
95ea3627 ID |
40 | const u8 request, const u8 requesttype, |
41 | const u16 offset, const u16 value, | |
42 | void *buffer, const u16 buffer_length, | |
e9136550 | 43 | const int timeout) |
95ea3627 | 44 | { |
c1d35dfa | 45 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
95ea3627 ID |
46 | int status; |
47 | unsigned int i; | |
48 | unsigned int pipe = | |
49 | (requesttype == USB_VENDOR_REQUEST_IN) ? | |
50 | usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0); | |
51 | ||
66f84d65 SC |
52 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
53 | return -ENODEV; | |
3d82346c | 54 | |
95ea3627 ID |
55 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
56 | status = usb_control_msg(usb_dev, pipe, request, requesttype, | |
57 | value, offset, buffer, buffer_length, | |
58 | timeout); | |
59 | if (status >= 0) | |
60 | return 0; | |
61 | ||
62 | /* | |
e9136550 | 63 | * Check for errors |
95ea3627 | 64 | * -ENODEV: Device has disappeared, no point continuing. |
e9136550 | 65 | * All other errors: Try again. |
95ea3627 | 66 | */ |
66f84d65 SC |
67 | else if (status == -ENODEV) { |
68 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
95ea3627 | 69 | break; |
66f84d65 | 70 | } |
95ea3627 ID |
71 | } |
72 | ||
73 | ERROR(rt2x00dev, | |
74 | "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n", | |
75 | request, offset, status); | |
76 | ||
77 | return status; | |
78 | } | |
79 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request); | |
80 | ||
3d82346c AB |
81 | int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev, |
82 | const u8 request, const u8 requesttype, | |
83 | const u16 offset, void *buffer, | |
84 | const u16 buffer_length, const int timeout) | |
95ea3627 ID |
85 | { |
86 | int status; | |
87 | ||
8ff48a8b | 88 | BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex)); |
3d82346c | 89 | |
95ea3627 ID |
90 | /* |
91 | * Check for Cache availability. | |
92 | */ | |
21795094 | 93 | if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) { |
95ea3627 ID |
94 | ERROR(rt2x00dev, "CSR cache not available.\n"); |
95 | return -ENOMEM; | |
96 | } | |
97 | ||
98 | if (requesttype == USB_VENDOR_REQUEST_OUT) | |
21795094 | 99 | memcpy(rt2x00dev->csr.cache, buffer, buffer_length); |
95ea3627 ID |
100 | |
101 | status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype, | |
21795094 | 102 | offset, 0, rt2x00dev->csr.cache, |
95ea3627 ID |
103 | buffer_length, timeout); |
104 | ||
105 | if (!status && requesttype == USB_VENDOR_REQUEST_IN) | |
21795094 | 106 | memcpy(buffer, rt2x00dev->csr.cache, buffer_length); |
95ea3627 ID |
107 | |
108 | return status; | |
109 | } | |
3d82346c AB |
110 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock); |
111 | ||
112 | int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev, | |
113 | const u8 request, const u8 requesttype, | |
114 | const u16 offset, void *buffer, | |
115 | const u16 buffer_length, const int timeout) | |
ed0dbeeb IM |
116 | { |
117 | int status = 0; | |
118 | unsigned char *tb; | |
119 | u16 off, len, bsize; | |
120 | ||
8ff48a8b | 121 | mutex_lock(&rt2x00dev->csr_mutex); |
ed0dbeeb | 122 | |
82f97b8d | 123 | tb = (char *)buffer; |
ed0dbeeb IM |
124 | off = offset; |
125 | len = buffer_length; | |
126 | while (len && !status) { | |
127 | bsize = min_t(u16, CSR_CACHE_SIZE, len); | |
128 | status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, | |
129 | requesttype, off, tb, | |
130 | bsize, timeout); | |
131 | ||
132 | tb += bsize; | |
133 | len -= bsize; | |
134 | off += bsize; | |
135 | } | |
136 | ||
8ff48a8b | 137 | mutex_unlock(&rt2x00dev->csr_mutex); |
ed0dbeeb IM |
138 | |
139 | return status; | |
140 | } | |
96b61baf | 141 | EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff); |
ed0dbeeb | 142 | |
0f829b1d ID |
143 | int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev, |
144 | const unsigned int offset, | |
f255b92b | 145 | const struct rt2x00_field32 field, |
0f829b1d ID |
146 | u32 *reg) |
147 | { | |
148 | unsigned int i; | |
149 | ||
66f84d65 SC |
150 | if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
151 | return -ENODEV; | |
152 | ||
0f829b1d ID |
153 | for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
154 | rt2x00usb_register_read_lock(rt2x00dev, offset, reg); | |
155 | if (!rt2x00_get_field32(*reg, field)) | |
156 | return 1; | |
157 | udelay(REGISTER_BUSY_DELAY); | |
158 | } | |
159 | ||
160 | ERROR(rt2x00dev, "Indirect register access failed: " | |
161 | "offset=0x%.08x, value=0x%.08x\n", offset, *reg); | |
162 | *reg = ~0; | |
163 | ||
164 | return 0; | |
165 | } | |
166 | EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read); | |
167 | ||
0e0d39e5 JS |
168 | |
169 | struct rt2x00_async_read_data { | |
170 | __le32 reg; | |
171 | struct usb_ctrlrequest cr; | |
172 | struct rt2x00_dev *rt2x00dev; | |
a073fdef | 173 | bool (*callback)(struct rt2x00_dev *, int, u32); |
0e0d39e5 JS |
174 | }; |
175 | ||
176 | static void rt2x00usb_register_read_async_cb(struct urb *urb) | |
177 | { | |
178 | struct rt2x00_async_read_data *rd = urb->context; | |
a073fdef ID |
179 | if (rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg))) { |
180 | if (usb_submit_urb(urb, GFP_ATOMIC) < 0) | |
181 | kfree(rd); | |
182 | } else | |
183 | kfree(rd); | |
0e0d39e5 JS |
184 | } |
185 | ||
186 | void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev, | |
187 | const unsigned int offset, | |
a073fdef | 188 | bool (*callback)(struct rt2x00_dev*, int, u32)) |
0e0d39e5 JS |
189 | { |
190 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
191 | struct urb *urb; | |
192 | struct rt2x00_async_read_data *rd; | |
193 | ||
194 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); | |
195 | if (!rd) | |
196 | return; | |
197 | ||
198 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
199 | if (!urb) { | |
200 | kfree(rd); | |
201 | return; | |
202 | } | |
203 | ||
204 | rd->rt2x00dev = rt2x00dev; | |
205 | rd->callback = callback; | |
206 | rd->cr.bRequestType = USB_VENDOR_REQUEST_IN; | |
207 | rd->cr.bRequest = USB_MULTI_READ; | |
208 | rd->cr.wValue = 0; | |
209 | rd->cr.wIndex = cpu_to_le16(offset); | |
210 | rd->cr.wLength = cpu_to_le16(sizeof(u32)); | |
211 | ||
212 | usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0), | |
213 | (unsigned char *)(&rd->cr), &rd->reg, sizeof(rd->reg), | |
214 | rt2x00usb_register_read_async_cb, rd); | |
215 | if (usb_submit_urb(urb, GFP_ATOMIC) < 0) | |
216 | kfree(rd); | |
217 | usb_free_urb(urb); | |
218 | } | |
219 | EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async); | |
220 | ||
95ea3627 ID |
221 | /* |
222 | * TX data handlers. | |
223 | */ | |
7e613e16 | 224 | static void rt2x00usb_work_txdone_entry(struct queue_entry *entry) |
95ea3627 | 225 | { |
95ea3627 | 226 | /* |
7e613e16 | 227 | * If the transfer to hardware succeeded, it does not mean the |
fb55f4d1 | 228 | * frame was send out correctly. It only means the frame |
25985edc | 229 | * was successfully pushed to the hardware, we have no |
fb55f4d1 ID |
230 | * way to determine the transmission status right now. |
231 | * (Only indirectly by looking at the failed TX counters | |
232 | * in the register). | |
95ea3627 | 233 | */ |
7e613e16 | 234 | if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags)) |
3392bece | 235 | rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE); |
7e613e16 | 236 | else |
3392bece | 237 | rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN); |
95ea3627 ID |
238 | } |
239 | ||
7e613e16 ID |
240 | static void rt2x00usb_work_txdone(struct work_struct *work) |
241 | { | |
242 | struct rt2x00_dev *rt2x00dev = | |
243 | container_of(work, struct rt2x00_dev, txdone_work); | |
244 | struct data_queue *queue; | |
245 | struct queue_entry *entry; | |
246 | ||
247 | tx_queue_for_each(rt2x00dev, queue) { | |
248 | while (!rt2x00queue_empty(queue)) { | |
249 | entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE); | |
250 | ||
dba5dc1a ID |
251 | if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
252 | !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
7e613e16 ID |
253 | break; |
254 | ||
255 | rt2x00usb_work_txdone_entry(entry); | |
256 | } | |
257 | } | |
258 | } | |
259 | ||
260 | static void rt2x00usb_interrupt_txdone(struct urb *urb) | |
261 | { | |
262 | struct queue_entry *entry = (struct queue_entry *)urb->context; | |
263 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
264 | ||
a1d1eabc | 265 | if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
7e613e16 ID |
266 | return; |
267 | ||
0e0d39e5 JS |
268 | if (rt2x00dev->ops->lib->tx_dma_done) |
269 | rt2x00dev->ops->lib->tx_dma_done(entry); | |
270 | ||
652a9dd2 ID |
271 | /* |
272 | * Report the frame as DMA done | |
273 | */ | |
274 | rt2x00lib_dmadone(entry); | |
275 | ||
7e613e16 ID |
276 | /* |
277 | * Check if the frame was correctly uploaded | |
278 | */ | |
279 | if (urb->status) | |
a1d1eabc | 280 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
7e613e16 ID |
281 | |
282 | /* | |
283 | * Schedule the delayed work for reading the TX status | |
284 | * from the device. | |
285 | */ | |
f0187a19 JS |
286 | if (!test_bit(REQUIRE_TXSTATUS_FIFO, &rt2x00dev->cap_flags) || |
287 | !kfifo_is_empty(&rt2x00dev->txstatus_fifo)) | |
288 | queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work); | |
7e613e16 ID |
289 | } |
290 | ||
10e11568 | 291 | static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void* data) |
f019d514 | 292 | { |
fe725697 GW |
293 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
294 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
f019d514 | 295 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
fe725697 | 296 | u32 length; |
d7bb5f84 | 297 | int status; |
fe725697 | 298 | |
dba5dc1a ID |
299 | if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) || |
300 | test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
10e11568 | 301 | return true; |
fe725697 | 302 | |
ee1e755f ID |
303 | /* |
304 | * USB devices cannot blindly pass the skb->len as the | |
305 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
306 | * to the driver to determine what the length should be. | |
307 | */ | |
308 | length = rt2x00dev->ops->lib->get_tx_data_len(entry); | |
f019d514 | 309 | |
ee1e755f ID |
310 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
311 | usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
312 | entry->skb->data, length, | |
313 | rt2x00usb_interrupt_txdone, entry); | |
314 | ||
d7bb5f84 JS |
315 | status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
316 | if (status) { | |
317 | if (status == -ENODEV) | |
318 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
a13c8f31 ID |
319 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
320 | rt2x00lib_dmadone(entry); | |
321 | } | |
10e11568 HS |
322 | |
323 | return false; | |
f019d514 ID |
324 | } |
325 | ||
0b7fde54 ID |
326 | /* |
327 | * RX data handlers. | |
328 | */ | |
329 | static void rt2x00usb_work_rxdone(struct work_struct *work) | |
330 | { | |
331 | struct rt2x00_dev *rt2x00dev = | |
332 | container_of(work, struct rt2x00_dev, rxdone_work); | |
333 | struct queue_entry *entry; | |
334 | struct skb_frame_desc *skbdesc; | |
335 | u8 rxd[32]; | |
336 | ||
337 | while (!rt2x00queue_empty(rt2x00dev->rx)) { | |
338 | entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE); | |
339 | ||
dba5dc1a ID |
340 | if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
341 | !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
0b7fde54 ID |
342 | break; |
343 | ||
344 | /* | |
345 | * Fill in desc fields of the skb descriptor | |
346 | */ | |
347 | skbdesc = get_skb_frame_desc(entry->skb); | |
348 | skbdesc->desc = rxd; | |
349 | skbdesc->desc_len = entry->queue->desc_size; | |
350 | ||
351 | /* | |
352 | * Send the frame to rt2x00lib for further processing. | |
353 | */ | |
354 | rt2x00lib_rxdone(entry); | |
355 | } | |
356 | } | |
357 | ||
358 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
359 | { | |
360 | struct queue_entry *entry = (struct queue_entry *)urb->context; | |
361 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
362 | ||
363 | if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) | |
364 | return; | |
365 | ||
366 | /* | |
367 | * Report the frame as DMA done | |
368 | */ | |
369 | rt2x00lib_dmadone(entry); | |
370 | ||
371 | /* | |
372 | * Check if the received data is simply too small | |
373 | * to be actually valid, or if the urb is signaling | |
374 | * a problem. | |
375 | */ | |
376 | if (urb->actual_length < entry->queue->desc_size || urb->status) | |
377 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
378 | ||
379 | /* | |
380 | * Schedule the delayed work for reading the RX status | |
381 | * from the device. | |
382 | */ | |
0439f536 | 383 | queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work); |
0b7fde54 ID |
384 | } |
385 | ||
10e11568 | 386 | static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void* data) |
0b7fde54 ID |
387 | { |
388 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
389 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
390 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
391 | int status; | |
392 | ||
dba5dc1a ID |
393 | if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
394 | test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
10e11568 | 395 | return true; |
0b7fde54 | 396 | |
64e7d723 ID |
397 | rt2x00lib_dmastart(entry); |
398 | ||
0b7fde54 ID |
399 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
400 | usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
401 | entry->skb->data, entry->skb->len, | |
402 | rt2x00usb_interrupt_rxdone, entry); | |
403 | ||
404 | status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
405 | if (status) { | |
406 | if (status == -ENODEV) | |
407 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
408 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
409 | rt2x00lib_dmadone(entry); | |
410 | } | |
10e11568 HS |
411 | |
412 | return false; | |
0b7fde54 ID |
413 | } |
414 | ||
dbba306f | 415 | void rt2x00usb_kick_queue(struct data_queue *queue) |
f019d514 | 416 | { |
dbba306f | 417 | switch (queue->qid) { |
f615e9a3 ID |
418 | case QID_AC_VO: |
419 | case QID_AC_VI: | |
dbba306f ID |
420 | case QID_AC_BE: |
421 | case QID_AC_BK: | |
dbba306f | 422 | if (!rt2x00queue_empty(queue)) |
10e11568 HS |
423 | rt2x00queue_for_each_entry(queue, |
424 | Q_INDEX_DONE, | |
425 | Q_INDEX, | |
426 | NULL, | |
dbba306f ID |
427 | rt2x00usb_kick_tx_entry); |
428 | break; | |
0b7fde54 ID |
429 | case QID_RX: |
430 | if (!rt2x00queue_full(queue)) | |
10e11568 HS |
431 | rt2x00queue_for_each_entry(queue, |
432 | Q_INDEX_DONE, | |
433 | Q_INDEX, | |
434 | NULL, | |
0b7fde54 ID |
435 | rt2x00usb_kick_rx_entry); |
436 | break; | |
dbba306f ID |
437 | default: |
438 | break; | |
439 | } | |
f019d514 | 440 | } |
dbba306f | 441 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue); |
f019d514 | 442 | |
10e11568 | 443 | static bool rt2x00usb_flush_entry(struct queue_entry *entry, void* data) |
a2c9b652 | 444 | { |
5eb7efe8 ID |
445 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
446 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
447 | struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data; | |
a2c9b652 | 448 | |
5eb7efe8 | 449 | if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
10e11568 | 450 | return true; |
5eb7efe8 ID |
451 | |
452 | usb_kill_urb(entry_priv->urb); | |
a2c9b652 ID |
453 | |
454 | /* | |
5eb7efe8 | 455 | * Kill guardian urb (if required by driver). |
a2c9b652 | 456 | */ |
5eb7efe8 | 457 | if ((entry->queue->qid == QID_BEACON) && |
7dab73b3 | 458 | (test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))) |
5eb7efe8 | 459 | usb_kill_urb(bcn_priv->guardian_urb); |
10e11568 HS |
460 | |
461 | return false; | |
5eb7efe8 | 462 | } |
a2c9b652 | 463 | |
152a5992 | 464 | void rt2x00usb_flush_queue(struct data_queue *queue, bool drop) |
5eb7efe8 | 465 | { |
5be65609 ID |
466 | struct work_struct *completion; |
467 | unsigned int i; | |
468 | ||
152a5992 ID |
469 | if (drop) |
470 | rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL, | |
471 | rt2x00usb_flush_entry); | |
5be65609 ID |
472 | |
473 | /* | |
474 | * Obtain the queue completion handler | |
475 | */ | |
476 | switch (queue->qid) { | |
f615e9a3 ID |
477 | case QID_AC_VO: |
478 | case QID_AC_VI: | |
5be65609 ID |
479 | case QID_AC_BE: |
480 | case QID_AC_BK: | |
5be65609 ID |
481 | completion = &queue->rt2x00dev->txdone_work; |
482 | break; | |
483 | case QID_RX: | |
484 | completion = &queue->rt2x00dev->rxdone_work; | |
485 | break; | |
486 | default: | |
487 | return; | |
488 | } | |
489 | ||
152a5992 | 490 | for (i = 0; i < 10; i++) { |
5be65609 ID |
491 | /* |
492 | * Check if the driver is already done, otherwise we | |
493 | * have to sleep a little while to give the driver/hw | |
494 | * the oppurtunity to complete interrupt process itself. | |
495 | */ | |
496 | if (rt2x00queue_empty(queue)) | |
497 | break; | |
498 | ||
499 | /* | |
500 | * Schedule the completion handler manually, when this | |
501 | * worker function runs, it should cleanup the queue. | |
502 | */ | |
0439f536 | 503 | queue_work(queue->rt2x00dev->workqueue, completion); |
5be65609 ID |
504 | |
505 | /* | |
506 | * Wait for a little while to give the driver | |
507 | * the oppurtunity to recover itself. | |
508 | */ | |
509 | msleep(10); | |
510 | } | |
a2c9b652 | 511 | } |
5be65609 | 512 | EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue); |
a2c9b652 | 513 | |
652a9dd2 | 514 | static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue) |
c965c74b | 515 | { |
652a9dd2 | 516 | WARNING(queue->rt2x00dev, "TX queue %d DMA timed out," |
094a1d92 | 517 | " invoke forced forced reset\n", queue->qid); |
c965c74b | 518 | |
5be65609 | 519 | rt2x00queue_flush_queue(queue, true); |
c965c74b ID |
520 | } |
521 | ||
652a9dd2 ID |
522 | static void rt2x00usb_watchdog_tx_status(struct data_queue *queue) |
523 | { | |
524 | WARNING(queue->rt2x00dev, "TX queue %d status timed out," | |
094a1d92 | 525 | " invoke forced tx handler\n", queue->qid); |
652a9dd2 | 526 | |
0439f536 | 527 | queue_work(queue->rt2x00dev->workqueue, &queue->rt2x00dev->txdone_work); |
652a9dd2 ID |
528 | } |
529 | ||
75256f03 JS |
530 | static int rt2x00usb_status_timeout(struct data_queue *queue) |
531 | { | |
532 | struct queue_entry *entry; | |
533 | ||
534 | entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE); | |
535 | return rt2x00queue_status_timeout(entry); | |
536 | } | |
537 | ||
538 | static int rt2x00usb_dma_timeout(struct data_queue *queue) | |
539 | { | |
540 | struct queue_entry *entry; | |
541 | ||
542 | entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE); | |
543 | return rt2x00queue_dma_timeout(entry); | |
544 | } | |
545 | ||
c965c74b ID |
546 | void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev) |
547 | { | |
548 | struct data_queue *queue; | |
549 | ||
550 | tx_queue_for_each(rt2x00dev, queue) { | |
1a397696 | 551 | if (!rt2x00queue_empty(queue)) { |
75256f03 | 552 | if (rt2x00usb_dma_timeout(queue)) |
1a397696 | 553 | rt2x00usb_watchdog_tx_dma(queue); |
75256f03 | 554 | if (rt2x00usb_status_timeout(queue)) |
1a397696 ID |
555 | rt2x00usb_watchdog_tx_status(queue); |
556 | } | |
c965c74b ID |
557 | } |
558 | } | |
559 | EXPORT_SYMBOL_GPL(rt2x00usb_watchdog); | |
560 | ||
95ea3627 ID |
561 | /* |
562 | * Radio handlers | |
563 | */ | |
95ea3627 ID |
564 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
565 | { | |
bd394a74 | 566 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 | 567 | REGISTER_TIMEOUT); |
95ea3627 ID |
568 | } |
569 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
570 | ||
571 | /* | |
572 | * Device initialization handlers. | |
573 | */ | |
798b7adb | 574 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 575 | { |
7e613e16 ID |
576 | entry->flags = 0; |
577 | ||
0b7fde54 | 578 | if (entry->queue->qid == QID_RX) |
10e11568 | 579 | rt2x00usb_kick_rx_entry(entry, NULL); |
837e7f24 | 580 | } |
798b7adb | 581 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 582 | |
f1ca2167 ID |
583 | static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
584 | struct usb_endpoint_descriptor *ep_desc) | |
585 | { | |
586 | struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); | |
587 | int pipe; | |
588 | ||
589 | queue->usb_endpoint = usb_endpoint_num(ep_desc); | |
590 | ||
591 | if (queue->qid == QID_RX) { | |
592 | pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); | |
593 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); | |
594 | } else { | |
595 | pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); | |
596 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); | |
597 | } | |
598 | ||
599 | if (!queue->usb_maxpacket) | |
600 | queue->usb_maxpacket = 1; | |
601 | } | |
602 | ||
603 | static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) | |
604 | { | |
605 | struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); | |
606 | struct usb_host_interface *intf_desc = intf->cur_altsetting; | |
607 | struct usb_endpoint_descriptor *ep_desc; | |
608 | struct data_queue *queue = rt2x00dev->tx; | |
609 | struct usb_endpoint_descriptor *tx_ep_desc = NULL; | |
610 | unsigned int i; | |
611 | ||
612 | /* | |
613 | * Walk through all available endpoints to search for "bulk in" | |
614 | * and "bulk out" endpoints. When we find such endpoints collect | |
615 | * the information we need from the descriptor and assign it | |
616 | * to the queue. | |
617 | */ | |
618 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
619 | ep_desc = &intf_desc->endpoint[i].desc; | |
620 | ||
621 | if (usb_endpoint_is_bulk_in(ep_desc)) { | |
622 | rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); | |
d15cfc3a ID |
623 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
624 | (queue != queue_end(rt2x00dev))) { | |
f1ca2167 | 625 | rt2x00usb_assign_endpoint(queue, ep_desc); |
d15cfc3a | 626 | queue = queue_next(queue); |
f1ca2167 | 627 | |
f1ca2167 ID |
628 | tx_ep_desc = ep_desc; |
629 | } | |
630 | } | |
631 | ||
632 | /* | |
633 | * At least 1 endpoint for RX and 1 endpoint for TX must be available. | |
634 | */ | |
635 | if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { | |
636 | ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); | |
637 | return -EPIPE; | |
638 | } | |
639 | ||
640 | /* | |
641 | * It might be possible not all queues have a dedicated endpoint. | |
642 | * Loop through all TX queues and copy the endpoint information | |
643 | * which we have gathered from already assigned endpoints. | |
644 | */ | |
645 | txall_queue_for_each(rt2x00dev, queue) { | |
646 | if (!queue->usb_endpoint) | |
647 | rt2x00usb_assign_endpoint(queue, tx_ep_desc); | |
648 | } | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
fa69560f | 653 | static int rt2x00usb_alloc_entries(struct data_queue *queue) |
95ea3627 | 654 | { |
fa69560f | 655 | struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
b8be63ff ID |
656 | struct queue_entry_priv_usb *entry_priv; |
657 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
658 | unsigned int i; |
659 | ||
b8be63ff ID |
660 | for (i = 0; i < queue->limit; i++) { |
661 | entry_priv = queue->entries[i].priv_data; | |
662 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
663 | if (!entry_priv->urb) | |
664 | return -ENOMEM; | |
665 | } | |
666 | ||
95ea3627 | 667 | /* |
b8be63ff ID |
668 | * If this is not the beacon queue or |
669 | * no guardian byte was required for the beacon, | |
670 | * then we are done. | |
95ea3627 | 671 | */ |
fa69560f | 672 | if (queue->qid != QID_BEACON || |
7dab73b3 | 673 | !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)) |
b8be63ff ID |
674 | return 0; |
675 | ||
181d6902 | 676 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
677 | bcn_priv = queue->entries[i].priv_data; |
678 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
679 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
680 | return -ENOMEM; |
681 | } | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
fa69560f | 686 | static void rt2x00usb_free_entries(struct data_queue *queue) |
95ea3627 | 687 | { |
fa69560f | 688 | struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
b8be63ff ID |
689 | struct queue_entry_priv_usb *entry_priv; |
690 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
691 | unsigned int i; |
692 | ||
181d6902 | 693 | if (!queue->entries) |
95ea3627 ID |
694 | return; |
695 | ||
181d6902 | 696 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
697 | entry_priv = queue->entries[i].priv_data; |
698 | usb_kill_urb(entry_priv->urb); | |
699 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 700 | } |
b8be63ff ID |
701 | |
702 | /* | |
703 | * If this is not the beacon queue or | |
704 | * no guardian byte was required for the beacon, | |
705 | * then we are done. | |
706 | */ | |
fa69560f | 707 | if (queue->qid != QID_BEACON || |
7dab73b3 | 708 | !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)) |
b8be63ff ID |
709 | return; |
710 | ||
711 | for (i = 0; i < queue->limit; i++) { | |
712 | bcn_priv = queue->entries[i].priv_data; | |
713 | usb_kill_urb(bcn_priv->guardian_urb); | |
714 | usb_free_urb(bcn_priv->guardian_urb); | |
715 | } | |
95ea3627 ID |
716 | } |
717 | ||
718 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
719 | { | |
181d6902 | 720 | struct data_queue *queue; |
30caa6e3 | 721 | int status; |
95ea3627 | 722 | |
f1ca2167 ID |
723 | /* |
724 | * Find endpoints for each queue | |
725 | */ | |
726 | status = rt2x00usb_find_endpoints(rt2x00dev); | |
727 | if (status) | |
728 | goto exit; | |
729 | ||
95ea3627 ID |
730 | /* |
731 | * Allocate DMA | |
732 | */ | |
181d6902 | 733 | queue_for_each(rt2x00dev, queue) { |
fa69560f | 734 | status = rt2x00usb_alloc_entries(queue); |
95ea3627 ID |
735 | if (status) |
736 | goto exit; | |
737 | } | |
738 | ||
95ea3627 ID |
739 | return 0; |
740 | ||
741 | exit: | |
742 | rt2x00usb_uninitialize(rt2x00dev); | |
743 | ||
744 | return status; | |
745 | } | |
746 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
747 | ||
748 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
749 | { | |
181d6902 | 750 | struct data_queue *queue; |
95ea3627 | 751 | |
181d6902 | 752 | queue_for_each(rt2x00dev, queue) |
fa69560f | 753 | rt2x00usb_free_entries(queue); |
95ea3627 ID |
754 | } |
755 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
756 | ||
757 | /* | |
758 | * USB driver handlers. | |
759 | */ | |
760 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
761 | { | |
762 | kfree(rt2x00dev->rf); | |
763 | rt2x00dev->rf = NULL; | |
764 | ||
765 | kfree(rt2x00dev->eeprom); | |
766 | rt2x00dev->eeprom = NULL; | |
767 | ||
21795094 ID |
768 | kfree(rt2x00dev->csr.cache); |
769 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
770 | } |
771 | ||
772 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
773 | { | |
21795094 ID |
774 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
775 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
776 | goto exit; |
777 | ||
778 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
779 | if (!rt2x00dev->eeprom) | |
780 | goto exit; | |
781 | ||
782 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
783 | if (!rt2x00dev->rf) | |
784 | goto exit; | |
785 | ||
786 | return 0; | |
787 | ||
788 | exit: | |
789 | ERROR_PROBE("Failed to allocate registers.\n"); | |
790 | ||
791 | rt2x00usb_free_reg(rt2x00dev); | |
792 | ||
793 | return -ENOMEM; | |
794 | } | |
795 | ||
796 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
e01ae27f | 797 | const struct rt2x00_ops *ops) |
95ea3627 ID |
798 | { |
799 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
95ea3627 ID |
800 | struct ieee80211_hw *hw; |
801 | struct rt2x00_dev *rt2x00dev; | |
802 | int retval; | |
803 | ||
804 | usb_dev = usb_get_dev(usb_dev); | |
805 | ||
806 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
807 | if (!hw) { | |
808 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
809 | retval = -ENOMEM; | |
810 | goto exit_put_device; | |
811 | } | |
812 | ||
813 | usb_set_intfdata(usb_intf, hw); | |
814 | ||
815 | rt2x00dev = hw->priv; | |
14a3bf89 | 816 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
817 | rt2x00dev->ops = ops; |
818 | rt2x00dev->hw = hw; | |
819 | ||
2015d192 GW |
820 | rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); |
821 | ||
7e613e16 ID |
822 | INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone); |
823 | INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone); | |
f0187a19 | 824 | init_timer(&rt2x00dev->txstatus_timer); |
7e613e16 | 825 | |
95ea3627 ID |
826 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
827 | if (retval) | |
828 | goto exit_free_device; | |
829 | ||
830 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
831 | if (retval) | |
832 | goto exit_free_reg; | |
833 | ||
834 | return 0; | |
835 | ||
836 | exit_free_reg: | |
837 | rt2x00usb_free_reg(rt2x00dev); | |
838 | ||
839 | exit_free_device: | |
840 | ieee80211_free_hw(hw); | |
841 | ||
842 | exit_put_device: | |
843 | usb_put_dev(usb_dev); | |
844 | ||
845 | usb_set_intfdata(usb_intf, NULL); | |
846 | ||
847 | return retval; | |
848 | } | |
849 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
850 | ||
851 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
852 | { | |
853 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
854 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
855 | ||
856 | /* | |
857 | * Free all allocated data. | |
858 | */ | |
859 | rt2x00lib_remove_dev(rt2x00dev); | |
860 | rt2x00usb_free_reg(rt2x00dev); | |
861 | ieee80211_free_hw(hw); | |
862 | ||
863 | /* | |
864 | * Free the USB device data. | |
865 | */ | |
866 | usb_set_intfdata(usb_intf, NULL); | |
867 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
868 | } | |
869 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
870 | ||
871 | #ifdef CONFIG_PM | |
872 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
873 | { | |
874 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
875 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
876 | int retval; | |
877 | ||
878 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
879 | if (retval) | |
880 | return retval; | |
881 | ||
95ea3627 ID |
882 | /* |
883 | * Decrease usbdev refcount. | |
884 | */ | |
885 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
886 | ||
887 | return 0; | |
888 | } | |
889 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
890 | ||
891 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
892 | { | |
893 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
894 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 ID |
895 | |
896 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
897 | ||
499a214c | 898 | return rt2x00lib_resume(rt2x00dev); |
95ea3627 ID |
899 | } |
900 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
901 | #endif /* CONFIG_PM */ | |
902 | ||
903 | /* | |
181d6902 | 904 | * rt2x00usb module information. |
95ea3627 ID |
905 | */ |
906 | MODULE_AUTHOR(DRV_PROJECT); | |
907 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 908 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 909 | MODULE_LICENSE("GPL"); |