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; | |
173 | void (*callback)(struct rt2x00_dev *,int,u32); | |
174 | }; | |
175 | ||
176 | static void rt2x00usb_register_read_async_cb(struct urb *urb) | |
177 | { | |
178 | struct rt2x00_async_read_data *rd = urb->context; | |
179 | rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg)); | |
180 | kfree(urb->context); | |
181 | } | |
182 | ||
183 | void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev, | |
184 | const unsigned int offset, | |
185 | void (*callback)(struct rt2x00_dev*,int,u32)) | |
186 | { | |
187 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
188 | struct urb *urb; | |
189 | struct rt2x00_async_read_data *rd; | |
190 | ||
191 | rd = kmalloc(sizeof(*rd), GFP_ATOMIC); | |
192 | if (!rd) | |
193 | return; | |
194 | ||
195 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
196 | if (!urb) { | |
197 | kfree(rd); | |
198 | return; | |
199 | } | |
200 | ||
201 | rd->rt2x00dev = rt2x00dev; | |
202 | rd->callback = callback; | |
203 | rd->cr.bRequestType = USB_VENDOR_REQUEST_IN; | |
204 | rd->cr.bRequest = USB_MULTI_READ; | |
205 | rd->cr.wValue = 0; | |
206 | rd->cr.wIndex = cpu_to_le16(offset); | |
207 | rd->cr.wLength = cpu_to_le16(sizeof(u32)); | |
208 | ||
209 | usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0), | |
210 | (unsigned char *)(&rd->cr), &rd->reg, sizeof(rd->reg), | |
211 | rt2x00usb_register_read_async_cb, rd); | |
212 | if (usb_submit_urb(urb, GFP_ATOMIC) < 0) | |
213 | kfree(rd); | |
214 | usb_free_urb(urb); | |
215 | } | |
216 | EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async); | |
217 | ||
95ea3627 ID |
218 | /* |
219 | * TX data handlers. | |
220 | */ | |
7e613e16 | 221 | static void rt2x00usb_work_txdone_entry(struct queue_entry *entry) |
95ea3627 | 222 | { |
95ea3627 | 223 | /* |
7e613e16 | 224 | * If the transfer to hardware succeeded, it does not mean the |
fb55f4d1 ID |
225 | * frame was send out correctly. It only means the frame |
226 | * was succesfully pushed to the hardware, we have no | |
227 | * way to determine the transmission status right now. | |
228 | * (Only indirectly by looking at the failed TX counters | |
229 | * in the register). | |
95ea3627 | 230 | */ |
7e613e16 | 231 | if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags)) |
3392bece | 232 | rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE); |
7e613e16 | 233 | else |
3392bece | 234 | rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN); |
95ea3627 ID |
235 | } |
236 | ||
7e613e16 ID |
237 | static void rt2x00usb_work_txdone(struct work_struct *work) |
238 | { | |
239 | struct rt2x00_dev *rt2x00dev = | |
240 | container_of(work, struct rt2x00_dev, txdone_work); | |
241 | struct data_queue *queue; | |
242 | struct queue_entry *entry; | |
243 | ||
244 | tx_queue_for_each(rt2x00dev, queue) { | |
245 | while (!rt2x00queue_empty(queue)) { | |
246 | entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE); | |
247 | ||
dba5dc1a ID |
248 | if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
249 | !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
7e613e16 ID |
250 | break; |
251 | ||
252 | rt2x00usb_work_txdone_entry(entry); | |
253 | } | |
254 | } | |
255 | } | |
256 | ||
257 | static void rt2x00usb_interrupt_txdone(struct urb *urb) | |
258 | { | |
259 | struct queue_entry *entry = (struct queue_entry *)urb->context; | |
260 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
261 | ||
a1d1eabc | 262 | if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
7e613e16 ID |
263 | return; |
264 | ||
0e0d39e5 JS |
265 | if (rt2x00dev->ops->lib->tx_dma_done) |
266 | rt2x00dev->ops->lib->tx_dma_done(entry); | |
267 | ||
652a9dd2 ID |
268 | /* |
269 | * Report the frame as DMA done | |
270 | */ | |
271 | rt2x00lib_dmadone(entry); | |
272 | ||
7e613e16 ID |
273 | /* |
274 | * Check if the frame was correctly uploaded | |
275 | */ | |
276 | if (urb->status) | |
a1d1eabc | 277 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
7e613e16 ID |
278 | |
279 | /* | |
280 | * Schedule the delayed work for reading the TX status | |
281 | * from the device. | |
282 | */ | |
0439f536 | 283 | queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work); |
7e613e16 ID |
284 | } |
285 | ||
10e11568 | 286 | static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void* data) |
f019d514 | 287 | { |
fe725697 GW |
288 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
289 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
f019d514 | 290 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
fe725697 | 291 | u32 length; |
d7bb5f84 | 292 | int status; |
fe725697 | 293 | |
dba5dc1a ID |
294 | if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) || |
295 | test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
10e11568 | 296 | return true; |
fe725697 | 297 | |
ee1e755f ID |
298 | /* |
299 | * USB devices cannot blindly pass the skb->len as the | |
300 | * length of the data to usb_fill_bulk_urb. Pass the skb | |
301 | * to the driver to determine what the length should be. | |
302 | */ | |
303 | length = rt2x00dev->ops->lib->get_tx_data_len(entry); | |
f019d514 | 304 | |
ee1e755f ID |
305 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
306 | usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
307 | entry->skb->data, length, | |
308 | rt2x00usb_interrupt_txdone, entry); | |
309 | ||
d7bb5f84 JS |
310 | status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
311 | if (status) { | |
312 | if (status == -ENODEV) | |
313 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
a13c8f31 ID |
314 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
315 | rt2x00lib_dmadone(entry); | |
316 | } | |
10e11568 HS |
317 | |
318 | return false; | |
f019d514 ID |
319 | } |
320 | ||
0b7fde54 ID |
321 | /* |
322 | * RX data handlers. | |
323 | */ | |
324 | static void rt2x00usb_work_rxdone(struct work_struct *work) | |
325 | { | |
326 | struct rt2x00_dev *rt2x00dev = | |
327 | container_of(work, struct rt2x00_dev, rxdone_work); | |
328 | struct queue_entry *entry; | |
329 | struct skb_frame_desc *skbdesc; | |
330 | u8 rxd[32]; | |
331 | ||
332 | while (!rt2x00queue_empty(rt2x00dev->rx)) { | |
333 | entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE); | |
334 | ||
dba5dc1a ID |
335 | if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
336 | !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
0b7fde54 ID |
337 | break; |
338 | ||
339 | /* | |
340 | * Fill in desc fields of the skb descriptor | |
341 | */ | |
342 | skbdesc = get_skb_frame_desc(entry->skb); | |
343 | skbdesc->desc = rxd; | |
344 | skbdesc->desc_len = entry->queue->desc_size; | |
345 | ||
346 | /* | |
347 | * Send the frame to rt2x00lib for further processing. | |
348 | */ | |
349 | rt2x00lib_rxdone(entry); | |
350 | } | |
351 | } | |
352 | ||
353 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
354 | { | |
355 | struct queue_entry *entry = (struct queue_entry *)urb->context; | |
356 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
357 | ||
358 | if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) | |
359 | return; | |
360 | ||
361 | /* | |
362 | * Report the frame as DMA done | |
363 | */ | |
364 | rt2x00lib_dmadone(entry); | |
365 | ||
366 | /* | |
367 | * Check if the received data is simply too small | |
368 | * to be actually valid, or if the urb is signaling | |
369 | * a problem. | |
370 | */ | |
371 | if (urb->actual_length < entry->queue->desc_size || urb->status) | |
372 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
373 | ||
374 | /* | |
375 | * Schedule the delayed work for reading the RX status | |
376 | * from the device. | |
377 | */ | |
0439f536 | 378 | queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work); |
0b7fde54 ID |
379 | } |
380 | ||
10e11568 | 381 | static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void* data) |
0b7fde54 ID |
382 | { |
383 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
384 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
385 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
386 | int status; | |
387 | ||
dba5dc1a ID |
388 | if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
389 | test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
10e11568 | 390 | return true; |
0b7fde54 | 391 | |
64e7d723 ID |
392 | rt2x00lib_dmastart(entry); |
393 | ||
0b7fde54 ID |
394 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
395 | usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
396 | entry->skb->data, entry->skb->len, | |
397 | rt2x00usb_interrupt_rxdone, entry); | |
398 | ||
399 | status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
400 | if (status) { | |
401 | if (status == -ENODEV) | |
402 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
403 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
404 | rt2x00lib_dmadone(entry); | |
405 | } | |
10e11568 HS |
406 | |
407 | return false; | |
0b7fde54 ID |
408 | } |
409 | ||
dbba306f | 410 | void rt2x00usb_kick_queue(struct data_queue *queue) |
f019d514 | 411 | { |
dbba306f | 412 | switch (queue->qid) { |
f615e9a3 ID |
413 | case QID_AC_VO: |
414 | case QID_AC_VI: | |
dbba306f ID |
415 | case QID_AC_BE: |
416 | case QID_AC_BK: | |
dbba306f | 417 | if (!rt2x00queue_empty(queue)) |
10e11568 HS |
418 | rt2x00queue_for_each_entry(queue, |
419 | Q_INDEX_DONE, | |
420 | Q_INDEX, | |
421 | NULL, | |
dbba306f ID |
422 | rt2x00usb_kick_tx_entry); |
423 | break; | |
0b7fde54 ID |
424 | case QID_RX: |
425 | if (!rt2x00queue_full(queue)) | |
10e11568 HS |
426 | rt2x00queue_for_each_entry(queue, |
427 | Q_INDEX_DONE, | |
428 | Q_INDEX, | |
429 | NULL, | |
0b7fde54 ID |
430 | rt2x00usb_kick_rx_entry); |
431 | break; | |
dbba306f ID |
432 | default: |
433 | break; | |
434 | } | |
f019d514 | 435 | } |
dbba306f | 436 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue); |
f019d514 | 437 | |
10e11568 | 438 | static bool rt2x00usb_flush_entry(struct queue_entry *entry, void* data) |
a2c9b652 | 439 | { |
5eb7efe8 ID |
440 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
441 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
442 | struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data; | |
a2c9b652 | 443 | |
5eb7efe8 | 444 | if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
10e11568 | 445 | return true; |
5eb7efe8 ID |
446 | |
447 | usb_kill_urb(entry_priv->urb); | |
a2c9b652 ID |
448 | |
449 | /* | |
5eb7efe8 | 450 | * Kill guardian urb (if required by driver). |
a2c9b652 | 451 | */ |
5eb7efe8 | 452 | if ((entry->queue->qid == QID_BEACON) && |
7dab73b3 | 453 | (test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))) |
5eb7efe8 | 454 | usb_kill_urb(bcn_priv->guardian_urb); |
10e11568 HS |
455 | |
456 | return false; | |
5eb7efe8 | 457 | } |
a2c9b652 | 458 | |
5be65609 | 459 | void rt2x00usb_flush_queue(struct data_queue *queue) |
5eb7efe8 | 460 | { |
5be65609 ID |
461 | struct work_struct *completion; |
462 | unsigned int i; | |
463 | ||
10e11568 | 464 | rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL, |
5be65609 ID |
465 | rt2x00usb_flush_entry); |
466 | ||
467 | /* | |
468 | * Obtain the queue completion handler | |
469 | */ | |
470 | switch (queue->qid) { | |
f615e9a3 ID |
471 | case QID_AC_VO: |
472 | case QID_AC_VI: | |
5be65609 ID |
473 | case QID_AC_BE: |
474 | case QID_AC_BK: | |
5be65609 ID |
475 | completion = &queue->rt2x00dev->txdone_work; |
476 | break; | |
477 | case QID_RX: | |
478 | completion = &queue->rt2x00dev->rxdone_work; | |
479 | break; | |
480 | default: | |
481 | return; | |
482 | } | |
483 | ||
484 | for (i = 0; i < 20; i++) { | |
485 | /* | |
486 | * Check if the driver is already done, otherwise we | |
487 | * have to sleep a little while to give the driver/hw | |
488 | * the oppurtunity to complete interrupt process itself. | |
489 | */ | |
490 | if (rt2x00queue_empty(queue)) | |
491 | break; | |
492 | ||
493 | /* | |
494 | * Schedule the completion handler manually, when this | |
495 | * worker function runs, it should cleanup the queue. | |
496 | */ | |
0439f536 | 497 | queue_work(queue->rt2x00dev->workqueue, completion); |
5be65609 ID |
498 | |
499 | /* | |
500 | * Wait for a little while to give the driver | |
501 | * the oppurtunity to recover itself. | |
502 | */ | |
503 | msleep(10); | |
504 | } | |
a2c9b652 | 505 | } |
5be65609 | 506 | EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue); |
a2c9b652 | 507 | |
652a9dd2 | 508 | static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue) |
c965c74b | 509 | { |
652a9dd2 | 510 | WARNING(queue->rt2x00dev, "TX queue %d DMA timed out," |
094a1d92 | 511 | " invoke forced forced reset\n", queue->qid); |
c965c74b | 512 | |
5be65609 | 513 | rt2x00queue_flush_queue(queue, true); |
c965c74b ID |
514 | } |
515 | ||
652a9dd2 ID |
516 | static void rt2x00usb_watchdog_tx_status(struct data_queue *queue) |
517 | { | |
518 | WARNING(queue->rt2x00dev, "TX queue %d status timed out," | |
094a1d92 | 519 | " invoke forced tx handler\n", queue->qid); |
652a9dd2 | 520 | |
0439f536 | 521 | queue_work(queue->rt2x00dev->workqueue, &queue->rt2x00dev->txdone_work); |
652a9dd2 ID |
522 | } |
523 | ||
75256f03 JS |
524 | static int rt2x00usb_status_timeout(struct data_queue *queue) |
525 | { | |
526 | struct queue_entry *entry; | |
527 | ||
528 | entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE); | |
529 | return rt2x00queue_status_timeout(entry); | |
530 | } | |
531 | ||
532 | static int rt2x00usb_dma_timeout(struct data_queue *queue) | |
533 | { | |
534 | struct queue_entry *entry; | |
535 | ||
536 | entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE); | |
537 | return rt2x00queue_dma_timeout(entry); | |
538 | } | |
539 | ||
c965c74b ID |
540 | void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev) |
541 | { | |
542 | struct data_queue *queue; | |
543 | ||
544 | tx_queue_for_each(rt2x00dev, queue) { | |
1a397696 | 545 | if (!rt2x00queue_empty(queue)) { |
75256f03 | 546 | if (rt2x00usb_dma_timeout(queue)) |
1a397696 | 547 | rt2x00usb_watchdog_tx_dma(queue); |
75256f03 | 548 | if (rt2x00usb_status_timeout(queue)) |
1a397696 ID |
549 | rt2x00usb_watchdog_tx_status(queue); |
550 | } | |
c965c74b ID |
551 | } |
552 | } | |
553 | EXPORT_SYMBOL_GPL(rt2x00usb_watchdog); | |
554 | ||
95ea3627 ID |
555 | /* |
556 | * Radio handlers | |
557 | */ | |
95ea3627 ID |
558 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
559 | { | |
bd394a74 | 560 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 | 561 | REGISTER_TIMEOUT); |
95ea3627 ID |
562 | } |
563 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
564 | ||
565 | /* | |
566 | * Device initialization handlers. | |
567 | */ | |
798b7adb | 568 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 569 | { |
7e613e16 ID |
570 | entry->flags = 0; |
571 | ||
0b7fde54 | 572 | if (entry->queue->qid == QID_RX) |
10e11568 | 573 | rt2x00usb_kick_rx_entry(entry, NULL); |
837e7f24 | 574 | } |
798b7adb | 575 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 576 | |
f1ca2167 ID |
577 | static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
578 | struct usb_endpoint_descriptor *ep_desc) | |
579 | { | |
580 | struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); | |
581 | int pipe; | |
582 | ||
583 | queue->usb_endpoint = usb_endpoint_num(ep_desc); | |
584 | ||
585 | if (queue->qid == QID_RX) { | |
586 | pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); | |
587 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); | |
588 | } else { | |
589 | pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); | |
590 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); | |
591 | } | |
592 | ||
593 | if (!queue->usb_maxpacket) | |
594 | queue->usb_maxpacket = 1; | |
595 | } | |
596 | ||
597 | static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) | |
598 | { | |
599 | struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); | |
600 | struct usb_host_interface *intf_desc = intf->cur_altsetting; | |
601 | struct usb_endpoint_descriptor *ep_desc; | |
602 | struct data_queue *queue = rt2x00dev->tx; | |
603 | struct usb_endpoint_descriptor *tx_ep_desc = NULL; | |
604 | unsigned int i; | |
605 | ||
606 | /* | |
607 | * Walk through all available endpoints to search for "bulk in" | |
608 | * and "bulk out" endpoints. When we find such endpoints collect | |
609 | * the information we need from the descriptor and assign it | |
610 | * to the queue. | |
611 | */ | |
612 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
613 | ep_desc = &intf_desc->endpoint[i].desc; | |
614 | ||
615 | if (usb_endpoint_is_bulk_in(ep_desc)) { | |
616 | rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); | |
d15cfc3a ID |
617 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
618 | (queue != queue_end(rt2x00dev))) { | |
f1ca2167 | 619 | rt2x00usb_assign_endpoint(queue, ep_desc); |
d15cfc3a | 620 | queue = queue_next(queue); |
f1ca2167 | 621 | |
f1ca2167 ID |
622 | tx_ep_desc = ep_desc; |
623 | } | |
624 | } | |
625 | ||
626 | /* | |
627 | * At least 1 endpoint for RX and 1 endpoint for TX must be available. | |
628 | */ | |
629 | if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { | |
630 | ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); | |
631 | return -EPIPE; | |
632 | } | |
633 | ||
634 | /* | |
635 | * It might be possible not all queues have a dedicated endpoint. | |
636 | * Loop through all TX queues and copy the endpoint information | |
637 | * which we have gathered from already assigned endpoints. | |
638 | */ | |
639 | txall_queue_for_each(rt2x00dev, queue) { | |
640 | if (!queue->usb_endpoint) | |
641 | rt2x00usb_assign_endpoint(queue, tx_ep_desc); | |
642 | } | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
fa69560f | 647 | static int rt2x00usb_alloc_entries(struct data_queue *queue) |
95ea3627 | 648 | { |
fa69560f | 649 | struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
b8be63ff ID |
650 | struct queue_entry_priv_usb *entry_priv; |
651 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
652 | unsigned int i; |
653 | ||
b8be63ff ID |
654 | for (i = 0; i < queue->limit; i++) { |
655 | entry_priv = queue->entries[i].priv_data; | |
656 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
657 | if (!entry_priv->urb) | |
658 | return -ENOMEM; | |
659 | } | |
660 | ||
95ea3627 | 661 | /* |
b8be63ff ID |
662 | * If this is not the beacon queue or |
663 | * no guardian byte was required for the beacon, | |
664 | * then we are done. | |
95ea3627 | 665 | */ |
fa69560f | 666 | if (queue->qid != QID_BEACON || |
7dab73b3 | 667 | !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)) |
b8be63ff ID |
668 | return 0; |
669 | ||
181d6902 | 670 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
671 | bcn_priv = queue->entries[i].priv_data; |
672 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
673 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
674 | return -ENOMEM; |
675 | } | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
fa69560f | 680 | static void rt2x00usb_free_entries(struct data_queue *queue) |
95ea3627 | 681 | { |
fa69560f | 682 | struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
b8be63ff ID |
683 | struct queue_entry_priv_usb *entry_priv; |
684 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
685 | unsigned int i; |
686 | ||
181d6902 | 687 | if (!queue->entries) |
95ea3627 ID |
688 | return; |
689 | ||
181d6902 | 690 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
691 | entry_priv = queue->entries[i].priv_data; |
692 | usb_kill_urb(entry_priv->urb); | |
693 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 694 | } |
b8be63ff ID |
695 | |
696 | /* | |
697 | * If this is not the beacon queue or | |
698 | * no guardian byte was required for the beacon, | |
699 | * then we are done. | |
700 | */ | |
fa69560f | 701 | if (queue->qid != QID_BEACON || |
7dab73b3 | 702 | !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)) |
b8be63ff ID |
703 | return; |
704 | ||
705 | for (i = 0; i < queue->limit; i++) { | |
706 | bcn_priv = queue->entries[i].priv_data; | |
707 | usb_kill_urb(bcn_priv->guardian_urb); | |
708 | usb_free_urb(bcn_priv->guardian_urb); | |
709 | } | |
95ea3627 ID |
710 | } |
711 | ||
712 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
713 | { | |
181d6902 | 714 | struct data_queue *queue; |
30caa6e3 | 715 | int status; |
95ea3627 | 716 | |
f1ca2167 ID |
717 | /* |
718 | * Find endpoints for each queue | |
719 | */ | |
720 | status = rt2x00usb_find_endpoints(rt2x00dev); | |
721 | if (status) | |
722 | goto exit; | |
723 | ||
95ea3627 ID |
724 | /* |
725 | * Allocate DMA | |
726 | */ | |
181d6902 | 727 | queue_for_each(rt2x00dev, queue) { |
fa69560f | 728 | status = rt2x00usb_alloc_entries(queue); |
95ea3627 ID |
729 | if (status) |
730 | goto exit; | |
731 | } | |
732 | ||
95ea3627 ID |
733 | return 0; |
734 | ||
735 | exit: | |
736 | rt2x00usb_uninitialize(rt2x00dev); | |
737 | ||
738 | return status; | |
739 | } | |
740 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
741 | ||
742 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
743 | { | |
181d6902 | 744 | struct data_queue *queue; |
95ea3627 | 745 | |
181d6902 | 746 | queue_for_each(rt2x00dev, queue) |
fa69560f | 747 | rt2x00usb_free_entries(queue); |
95ea3627 ID |
748 | } |
749 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
750 | ||
751 | /* | |
752 | * USB driver handlers. | |
753 | */ | |
754 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
755 | { | |
756 | kfree(rt2x00dev->rf); | |
757 | rt2x00dev->rf = NULL; | |
758 | ||
759 | kfree(rt2x00dev->eeprom); | |
760 | rt2x00dev->eeprom = NULL; | |
761 | ||
21795094 ID |
762 | kfree(rt2x00dev->csr.cache); |
763 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
764 | } |
765 | ||
766 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
767 | { | |
21795094 ID |
768 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
769 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
770 | goto exit; |
771 | ||
772 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
773 | if (!rt2x00dev->eeprom) | |
774 | goto exit; | |
775 | ||
776 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
777 | if (!rt2x00dev->rf) | |
778 | goto exit; | |
779 | ||
780 | return 0; | |
781 | ||
782 | exit: | |
783 | ERROR_PROBE("Failed to allocate registers.\n"); | |
784 | ||
785 | rt2x00usb_free_reg(rt2x00dev); | |
786 | ||
787 | return -ENOMEM; | |
788 | } | |
789 | ||
790 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
791 | const struct usb_device_id *id) | |
792 | { | |
793 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
794 | struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info; | |
795 | struct ieee80211_hw *hw; | |
796 | struct rt2x00_dev *rt2x00dev; | |
797 | int retval; | |
798 | ||
799 | usb_dev = usb_get_dev(usb_dev); | |
800 | ||
801 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
802 | if (!hw) { | |
803 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
804 | retval = -ENOMEM; | |
805 | goto exit_put_device; | |
806 | } | |
807 | ||
808 | usb_set_intfdata(usb_intf, hw); | |
809 | ||
810 | rt2x00dev = hw->priv; | |
14a3bf89 | 811 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
812 | rt2x00dev->ops = ops; |
813 | rt2x00dev->hw = hw; | |
814 | ||
2015d192 GW |
815 | rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); |
816 | ||
7e613e16 ID |
817 | INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone); |
818 | INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone); | |
819 | ||
95ea3627 ID |
820 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
821 | if (retval) | |
822 | goto exit_free_device; | |
823 | ||
824 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
825 | if (retval) | |
826 | goto exit_free_reg; | |
827 | ||
828 | return 0; | |
829 | ||
830 | exit_free_reg: | |
831 | rt2x00usb_free_reg(rt2x00dev); | |
832 | ||
833 | exit_free_device: | |
834 | ieee80211_free_hw(hw); | |
835 | ||
836 | exit_put_device: | |
837 | usb_put_dev(usb_dev); | |
838 | ||
839 | usb_set_intfdata(usb_intf, NULL); | |
840 | ||
841 | return retval; | |
842 | } | |
843 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
844 | ||
845 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
846 | { | |
847 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
848 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
849 | ||
850 | /* | |
851 | * Free all allocated data. | |
852 | */ | |
853 | rt2x00lib_remove_dev(rt2x00dev); | |
854 | rt2x00usb_free_reg(rt2x00dev); | |
855 | ieee80211_free_hw(hw); | |
856 | ||
857 | /* | |
858 | * Free the USB device data. | |
859 | */ | |
860 | usb_set_intfdata(usb_intf, NULL); | |
861 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
862 | } | |
863 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
864 | ||
865 | #ifdef CONFIG_PM | |
866 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
867 | { | |
868 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
869 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
870 | int retval; | |
871 | ||
872 | retval = rt2x00lib_suspend(rt2x00dev, state); | |
873 | if (retval) | |
874 | return retval; | |
875 | ||
95ea3627 ID |
876 | /* |
877 | * Decrease usbdev refcount. | |
878 | */ | |
879 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
880 | ||
881 | return 0; | |
882 | } | |
883 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
884 | ||
885 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
886 | { | |
887 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
888 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 ID |
889 | |
890 | usb_get_dev(interface_to_usbdev(usb_intf)); | |
891 | ||
499a214c | 892 | return rt2x00lib_resume(rt2x00dev); |
95ea3627 ID |
893 | } |
894 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
895 | #endif /* CONFIG_PM */ | |
896 | ||
897 | /* | |
181d6902 | 898 | * rt2x00usb module information. |
95ea3627 ID |
899 | */ |
900 | MODULE_AUTHOR(DRV_PROJECT); | |
901 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 902 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 903 | MODULE_LICENSE("GPL"); |