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 | ||
df71c9cf | 265 | if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
7e613e16 | 266 | return; |
7e613e16 ID |
267 | /* |
268 | * Check if the frame was correctly uploaded | |
269 | */ | |
270 | if (urb->status) | |
a1d1eabc | 271 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
df71c9cf SG |
272 | /* |
273 | * Report the frame as DMA done | |
274 | */ | |
275 | rt2x00lib_dmadone(entry); | |
7e613e16 | 276 | |
df71c9cf SG |
277 | if (rt2x00dev->ops->lib->tx_dma_done) |
278 | rt2x00dev->ops->lib->tx_dma_done(entry); | |
7e613e16 ID |
279 | /* |
280 | * Schedule the delayed work for reading the TX status | |
281 | * from the device. | |
282 | */ | |
f0187a19 JS |
283 | if (!test_bit(REQUIRE_TXSTATUS_FIFO, &rt2x00dev->cap_flags) || |
284 | !kfifo_is_empty(&rt2x00dev->txstatus_fifo)) | |
285 | queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work); | |
7e613e16 ID |
286 | } |
287 | ||
db36f792 | 288 | static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry) |
f019d514 | 289 | { |
fe725697 GW |
290 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
291 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
f019d514 | 292 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
fe725697 | 293 | u32 length; |
d7bb5f84 | 294 | int status; |
fe725697 | 295 | |
dba5dc1a ID |
296 | if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) || |
297 | test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
4268d8ed | 298 | return false; |
fe725697 | 299 | |
ee1e755f | 300 | /* |
d823a50e JK |
301 | * USB devices require certain padding at the end of each frame |
302 | * and urb. Those paddings are not included in skbs. Pass entry | |
303 | * to the driver to determine what the overall length should be. | |
ee1e755f ID |
304 | */ |
305 | length = rt2x00dev->ops->lib->get_tx_data_len(entry); | |
f019d514 | 306 | |
d823a50e JK |
307 | status = skb_padto(entry->skb, length); |
308 | if (unlikely(status)) { | |
309 | /* TODO: report something more appropriate than IO_FAILED. */ | |
310 | WARNING(rt2x00dev, "TX SKB padding error, out of memory\n"); | |
311 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
312 | rt2x00lib_dmadone(entry); | |
313 | ||
314 | return false; | |
315 | } | |
316 | ||
ee1e755f ID |
317 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
318 | usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
319 | entry->skb->data, length, | |
320 | rt2x00usb_interrupt_txdone, entry); | |
321 | ||
d7bb5f84 JS |
322 | status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
323 | if (status) { | |
324 | if (status == -ENODEV) | |
325 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
a13c8f31 ID |
326 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
327 | rt2x00lib_dmadone(entry); | |
328 | } | |
10e11568 HS |
329 | |
330 | return false; | |
f019d514 ID |
331 | } |
332 | ||
0b7fde54 ID |
333 | /* |
334 | * RX data handlers. | |
335 | */ | |
336 | static void rt2x00usb_work_rxdone(struct work_struct *work) | |
337 | { | |
338 | struct rt2x00_dev *rt2x00dev = | |
339 | container_of(work, struct rt2x00_dev, rxdone_work); | |
340 | struct queue_entry *entry; | |
341 | struct skb_frame_desc *skbdesc; | |
342 | u8 rxd[32]; | |
343 | ||
344 | while (!rt2x00queue_empty(rt2x00dev->rx)) { | |
345 | entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE); | |
346 | ||
dba5dc1a ID |
347 | if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
348 | !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
0b7fde54 ID |
349 | break; |
350 | ||
351 | /* | |
352 | * Fill in desc fields of the skb descriptor | |
353 | */ | |
354 | skbdesc = get_skb_frame_desc(entry->skb); | |
355 | skbdesc->desc = rxd; | |
356 | skbdesc->desc_len = entry->queue->desc_size; | |
357 | ||
358 | /* | |
359 | * Send the frame to rt2x00lib for further processing. | |
360 | */ | |
88211021 | 361 | rt2x00lib_rxdone(entry, GFP_KERNEL); |
0b7fde54 ID |
362 | } |
363 | } | |
364 | ||
365 | static void rt2x00usb_interrupt_rxdone(struct urb *urb) | |
366 | { | |
367 | struct queue_entry *entry = (struct queue_entry *)urb->context; | |
368 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
369 | ||
370 | if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) | |
371 | return; | |
372 | ||
373 | /* | |
374 | * Report the frame as DMA done | |
375 | */ | |
376 | rt2x00lib_dmadone(entry); | |
377 | ||
378 | /* | |
379 | * Check if the received data is simply too small | |
380 | * to be actually valid, or if the urb is signaling | |
381 | * a problem. | |
382 | */ | |
383 | if (urb->actual_length < entry->queue->desc_size || urb->status) | |
384 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
385 | ||
386 | /* | |
387 | * Schedule the delayed work for reading the RX status | |
388 | * from the device. | |
389 | */ | |
0439f536 | 390 | queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work); |
0b7fde54 ID |
391 | } |
392 | ||
db36f792 | 393 | static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry) |
0b7fde54 ID |
394 | { |
395 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
396 | struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); | |
397 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
398 | int status; | |
399 | ||
dba5dc1a ID |
400 | if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
401 | test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) | |
4268d8ed | 402 | return false; |
0b7fde54 | 403 | |
64e7d723 ID |
404 | rt2x00lib_dmastart(entry); |
405 | ||
0b7fde54 ID |
406 | usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
407 | usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint), | |
408 | entry->skb->data, entry->skb->len, | |
409 | rt2x00usb_interrupt_rxdone, entry); | |
410 | ||
411 | status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); | |
412 | if (status) { | |
413 | if (status == -ENODEV) | |
414 | clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); | |
415 | set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); | |
416 | rt2x00lib_dmadone(entry); | |
417 | } | |
10e11568 HS |
418 | |
419 | return false; | |
0b7fde54 ID |
420 | } |
421 | ||
dbba306f | 422 | void rt2x00usb_kick_queue(struct data_queue *queue) |
f019d514 | 423 | { |
dbba306f | 424 | switch (queue->qid) { |
f615e9a3 ID |
425 | case QID_AC_VO: |
426 | case QID_AC_VI: | |
dbba306f ID |
427 | case QID_AC_BE: |
428 | case QID_AC_BK: | |
dbba306f | 429 | if (!rt2x00queue_empty(queue)) |
db36f792 | 430 | rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, |
dbba306f ID |
431 | rt2x00usb_kick_tx_entry); |
432 | break; | |
0b7fde54 ID |
433 | case QID_RX: |
434 | if (!rt2x00queue_full(queue)) | |
db36f792 | 435 | rt2x00queue_for_each_entry(queue, Q_INDEX, Q_INDEX_DONE, |
0b7fde54 ID |
436 | rt2x00usb_kick_rx_entry); |
437 | break; | |
dbba306f ID |
438 | default: |
439 | break; | |
440 | } | |
f019d514 | 441 | } |
dbba306f | 442 | EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue); |
f019d514 | 443 | |
db36f792 | 444 | static bool rt2x00usb_flush_entry(struct queue_entry *entry) |
a2c9b652 | 445 | { |
5eb7efe8 ID |
446 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
447 | struct queue_entry_priv_usb *entry_priv = entry->priv_data; | |
448 | struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data; | |
a2c9b652 | 449 | |
5eb7efe8 | 450 | if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
4268d8ed | 451 | return false; |
5eb7efe8 ID |
452 | |
453 | usb_kill_urb(entry_priv->urb); | |
a2c9b652 ID |
454 | |
455 | /* | |
5eb7efe8 | 456 | * Kill guardian urb (if required by driver). |
a2c9b652 | 457 | */ |
5eb7efe8 | 458 | if ((entry->queue->qid == QID_BEACON) && |
7dab73b3 | 459 | (test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))) |
5eb7efe8 | 460 | usb_kill_urb(bcn_priv->guardian_urb); |
10e11568 HS |
461 | |
462 | return false; | |
5eb7efe8 | 463 | } |
a2c9b652 | 464 | |
152a5992 | 465 | void rt2x00usb_flush_queue(struct data_queue *queue, bool drop) |
5eb7efe8 | 466 | { |
5be65609 ID |
467 | struct work_struct *completion; |
468 | unsigned int i; | |
469 | ||
152a5992 | 470 | if (drop) |
db36f792 | 471 | rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, |
152a5992 | 472 | rt2x00usb_flush_entry); |
5be65609 ID |
473 | |
474 | /* | |
475 | * Obtain the queue completion handler | |
476 | */ | |
477 | switch (queue->qid) { | |
f615e9a3 ID |
478 | case QID_AC_VO: |
479 | case QID_AC_VI: | |
5be65609 ID |
480 | case QID_AC_BE: |
481 | case QID_AC_BK: | |
5be65609 ID |
482 | completion = &queue->rt2x00dev->txdone_work; |
483 | break; | |
484 | case QID_RX: | |
485 | completion = &queue->rt2x00dev->rxdone_work; | |
486 | break; | |
487 | default: | |
488 | return; | |
489 | } | |
490 | ||
152a5992 | 491 | for (i = 0; i < 10; i++) { |
5be65609 ID |
492 | /* |
493 | * Check if the driver is already done, otherwise we | |
494 | * have to sleep a little while to give the driver/hw | |
495 | * the oppurtunity to complete interrupt process itself. | |
496 | */ | |
497 | if (rt2x00queue_empty(queue)) | |
498 | break; | |
499 | ||
500 | /* | |
501 | * Schedule the completion handler manually, when this | |
502 | * worker function runs, it should cleanup the queue. | |
503 | */ | |
0439f536 | 504 | queue_work(queue->rt2x00dev->workqueue, completion); |
5be65609 ID |
505 | |
506 | /* | |
507 | * Wait for a little while to give the driver | |
508 | * the oppurtunity to recover itself. | |
509 | */ | |
510 | msleep(10); | |
511 | } | |
a2c9b652 | 512 | } |
5be65609 | 513 | EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue); |
a2c9b652 | 514 | |
652a9dd2 | 515 | static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue) |
c965c74b | 516 | { |
652a9dd2 | 517 | WARNING(queue->rt2x00dev, "TX queue %d DMA timed out," |
094a1d92 | 518 | " invoke forced forced reset\n", queue->qid); |
c965c74b | 519 | |
5be65609 | 520 | rt2x00queue_flush_queue(queue, true); |
c965c74b ID |
521 | } |
522 | ||
75256f03 JS |
523 | static int rt2x00usb_dma_timeout(struct data_queue *queue) |
524 | { | |
525 | struct queue_entry *entry; | |
526 | ||
527 | entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE); | |
528 | return rt2x00queue_dma_timeout(entry); | |
529 | } | |
530 | ||
c965c74b ID |
531 | void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev) |
532 | { | |
533 | struct data_queue *queue; | |
534 | ||
535 | tx_queue_for_each(rt2x00dev, queue) { | |
1a397696 | 536 | if (!rt2x00queue_empty(queue)) { |
75256f03 | 537 | if (rt2x00usb_dma_timeout(queue)) |
1a397696 | 538 | rt2x00usb_watchdog_tx_dma(queue); |
1a397696 | 539 | } |
c965c74b ID |
540 | } |
541 | } | |
542 | EXPORT_SYMBOL_GPL(rt2x00usb_watchdog); | |
543 | ||
95ea3627 ID |
544 | /* |
545 | * Radio handlers | |
546 | */ | |
95ea3627 ID |
547 | void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
548 | { | |
bd394a74 | 549 | rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
95ea3627 | 550 | REGISTER_TIMEOUT); |
95ea3627 ID |
551 | } |
552 | EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); | |
553 | ||
554 | /* | |
555 | * Device initialization handlers. | |
556 | */ | |
798b7adb | 557 | void rt2x00usb_clear_entry(struct queue_entry *entry) |
837e7f24 | 558 | { |
7e613e16 ID |
559 | entry->flags = 0; |
560 | ||
0b7fde54 | 561 | if (entry->queue->qid == QID_RX) |
db36f792 | 562 | rt2x00usb_kick_rx_entry(entry); |
837e7f24 | 563 | } |
798b7adb | 564 | EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
837e7f24 | 565 | |
f1ca2167 ID |
566 | static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
567 | struct usb_endpoint_descriptor *ep_desc) | |
568 | { | |
569 | struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); | |
570 | int pipe; | |
571 | ||
572 | queue->usb_endpoint = usb_endpoint_num(ep_desc); | |
573 | ||
574 | if (queue->qid == QID_RX) { | |
575 | pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); | |
576 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); | |
577 | } else { | |
578 | pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); | |
579 | queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); | |
580 | } | |
581 | ||
582 | if (!queue->usb_maxpacket) | |
583 | queue->usb_maxpacket = 1; | |
584 | } | |
585 | ||
586 | static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) | |
587 | { | |
588 | struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); | |
589 | struct usb_host_interface *intf_desc = intf->cur_altsetting; | |
590 | struct usb_endpoint_descriptor *ep_desc; | |
591 | struct data_queue *queue = rt2x00dev->tx; | |
592 | struct usb_endpoint_descriptor *tx_ep_desc = NULL; | |
593 | unsigned int i; | |
594 | ||
595 | /* | |
596 | * Walk through all available endpoints to search for "bulk in" | |
597 | * and "bulk out" endpoints. When we find such endpoints collect | |
598 | * the information we need from the descriptor and assign it | |
599 | * to the queue. | |
600 | */ | |
601 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
602 | ep_desc = &intf_desc->endpoint[i].desc; | |
603 | ||
604 | if (usb_endpoint_is_bulk_in(ep_desc)) { | |
605 | rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); | |
d15cfc3a ID |
606 | } else if (usb_endpoint_is_bulk_out(ep_desc) && |
607 | (queue != queue_end(rt2x00dev))) { | |
f1ca2167 | 608 | rt2x00usb_assign_endpoint(queue, ep_desc); |
d15cfc3a | 609 | queue = queue_next(queue); |
f1ca2167 | 610 | |
f1ca2167 ID |
611 | tx_ep_desc = ep_desc; |
612 | } | |
613 | } | |
614 | ||
615 | /* | |
616 | * At least 1 endpoint for RX and 1 endpoint for TX must be available. | |
617 | */ | |
618 | if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { | |
619 | ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); | |
620 | return -EPIPE; | |
621 | } | |
622 | ||
623 | /* | |
624 | * It might be possible not all queues have a dedicated endpoint. | |
625 | * Loop through all TX queues and copy the endpoint information | |
626 | * which we have gathered from already assigned endpoints. | |
627 | */ | |
628 | txall_queue_for_each(rt2x00dev, queue) { | |
629 | if (!queue->usb_endpoint) | |
630 | rt2x00usb_assign_endpoint(queue, tx_ep_desc); | |
631 | } | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
fa69560f | 636 | static int rt2x00usb_alloc_entries(struct data_queue *queue) |
95ea3627 | 637 | { |
fa69560f | 638 | struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
b8be63ff ID |
639 | struct queue_entry_priv_usb *entry_priv; |
640 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
641 | unsigned int i; |
642 | ||
b8be63ff ID |
643 | for (i = 0; i < queue->limit; i++) { |
644 | entry_priv = queue->entries[i].priv_data; | |
645 | entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); | |
646 | if (!entry_priv->urb) | |
647 | return -ENOMEM; | |
648 | } | |
649 | ||
95ea3627 | 650 | /* |
b8be63ff ID |
651 | * If this is not the beacon queue or |
652 | * no guardian byte was required for the beacon, | |
653 | * then we are done. | |
95ea3627 | 654 | */ |
fa69560f | 655 | if (queue->qid != QID_BEACON || |
7dab73b3 | 656 | !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)) |
b8be63ff ID |
657 | return 0; |
658 | ||
181d6902 | 659 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
660 | bcn_priv = queue->entries[i].priv_data; |
661 | bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); | |
662 | if (!bcn_priv->guardian_urb) | |
95ea3627 ID |
663 | return -ENOMEM; |
664 | } | |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
fa69560f | 669 | static void rt2x00usb_free_entries(struct data_queue *queue) |
95ea3627 | 670 | { |
fa69560f | 671 | struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
b8be63ff ID |
672 | struct queue_entry_priv_usb *entry_priv; |
673 | struct queue_entry_priv_usb_bcn *bcn_priv; | |
95ea3627 ID |
674 | unsigned int i; |
675 | ||
181d6902 | 676 | if (!queue->entries) |
95ea3627 ID |
677 | return; |
678 | ||
181d6902 | 679 | for (i = 0; i < queue->limit; i++) { |
b8be63ff ID |
680 | entry_priv = queue->entries[i].priv_data; |
681 | usb_kill_urb(entry_priv->urb); | |
682 | usb_free_urb(entry_priv->urb); | |
95ea3627 | 683 | } |
b8be63ff ID |
684 | |
685 | /* | |
686 | * If this is not the beacon queue or | |
687 | * no guardian byte was required for the beacon, | |
688 | * then we are done. | |
689 | */ | |
fa69560f | 690 | if (queue->qid != QID_BEACON || |
7dab73b3 | 691 | !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)) |
b8be63ff ID |
692 | return; |
693 | ||
694 | for (i = 0; i < queue->limit; i++) { | |
695 | bcn_priv = queue->entries[i].priv_data; | |
696 | usb_kill_urb(bcn_priv->guardian_urb); | |
697 | usb_free_urb(bcn_priv->guardian_urb); | |
698 | } | |
95ea3627 ID |
699 | } |
700 | ||
701 | int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) | |
702 | { | |
181d6902 | 703 | struct data_queue *queue; |
30caa6e3 | 704 | int status; |
95ea3627 | 705 | |
f1ca2167 ID |
706 | /* |
707 | * Find endpoints for each queue | |
708 | */ | |
709 | status = rt2x00usb_find_endpoints(rt2x00dev); | |
710 | if (status) | |
711 | goto exit; | |
712 | ||
95ea3627 ID |
713 | /* |
714 | * Allocate DMA | |
715 | */ | |
181d6902 | 716 | queue_for_each(rt2x00dev, queue) { |
fa69560f | 717 | status = rt2x00usb_alloc_entries(queue); |
95ea3627 ID |
718 | if (status) |
719 | goto exit; | |
720 | } | |
721 | ||
95ea3627 ID |
722 | return 0; |
723 | ||
724 | exit: | |
725 | rt2x00usb_uninitialize(rt2x00dev); | |
726 | ||
727 | return status; | |
728 | } | |
729 | EXPORT_SYMBOL_GPL(rt2x00usb_initialize); | |
730 | ||
731 | void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) | |
732 | { | |
181d6902 | 733 | struct data_queue *queue; |
95ea3627 | 734 | |
181d6902 | 735 | queue_for_each(rt2x00dev, queue) |
fa69560f | 736 | rt2x00usb_free_entries(queue); |
95ea3627 ID |
737 | } |
738 | EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); | |
739 | ||
740 | /* | |
741 | * USB driver handlers. | |
742 | */ | |
743 | static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) | |
744 | { | |
745 | kfree(rt2x00dev->rf); | |
746 | rt2x00dev->rf = NULL; | |
747 | ||
748 | kfree(rt2x00dev->eeprom); | |
749 | rt2x00dev->eeprom = NULL; | |
750 | ||
21795094 ID |
751 | kfree(rt2x00dev->csr.cache); |
752 | rt2x00dev->csr.cache = NULL; | |
95ea3627 ID |
753 | } |
754 | ||
755 | static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) | |
756 | { | |
21795094 ID |
757 | rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
758 | if (!rt2x00dev->csr.cache) | |
95ea3627 ID |
759 | goto exit; |
760 | ||
761 | rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); | |
762 | if (!rt2x00dev->eeprom) | |
763 | goto exit; | |
764 | ||
765 | rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); | |
766 | if (!rt2x00dev->rf) | |
767 | goto exit; | |
768 | ||
769 | return 0; | |
770 | ||
771 | exit: | |
772 | ERROR_PROBE("Failed to allocate registers.\n"); | |
773 | ||
774 | rt2x00usb_free_reg(rt2x00dev); | |
775 | ||
776 | return -ENOMEM; | |
777 | } | |
778 | ||
779 | int rt2x00usb_probe(struct usb_interface *usb_intf, | |
e01ae27f | 780 | const struct rt2x00_ops *ops) |
95ea3627 ID |
781 | { |
782 | struct usb_device *usb_dev = interface_to_usbdev(usb_intf); | |
95ea3627 ID |
783 | struct ieee80211_hw *hw; |
784 | struct rt2x00_dev *rt2x00dev; | |
785 | int retval; | |
786 | ||
787 | usb_dev = usb_get_dev(usb_dev); | |
bf4c02d5 | 788 | usb_reset_device(usb_dev); |
95ea3627 ID |
789 | |
790 | hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); | |
791 | if (!hw) { | |
792 | ERROR_PROBE("Failed to allocate hardware.\n"); | |
793 | retval = -ENOMEM; | |
794 | goto exit_put_device; | |
795 | } | |
796 | ||
797 | usb_set_intfdata(usb_intf, hw); | |
798 | ||
799 | rt2x00dev = hw->priv; | |
14a3bf89 | 800 | rt2x00dev->dev = &usb_intf->dev; |
95ea3627 ID |
801 | rt2x00dev->ops = ops; |
802 | rt2x00dev->hw = hw; | |
803 | ||
2015d192 GW |
804 | rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); |
805 | ||
7e613e16 ID |
806 | INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone); |
807 | INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone); | |
f421111b SG |
808 | hrtimer_init(&rt2x00dev->txstatus_timer, CLOCK_MONOTONIC, |
809 | HRTIMER_MODE_REL); | |
7e613e16 | 810 | |
95ea3627 ID |
811 | retval = rt2x00usb_alloc_reg(rt2x00dev); |
812 | if (retval) | |
813 | goto exit_free_device; | |
814 | ||
815 | retval = rt2x00lib_probe_dev(rt2x00dev); | |
816 | if (retval) | |
817 | goto exit_free_reg; | |
818 | ||
819 | return 0; | |
820 | ||
821 | exit_free_reg: | |
822 | rt2x00usb_free_reg(rt2x00dev); | |
823 | ||
824 | exit_free_device: | |
825 | ieee80211_free_hw(hw); | |
826 | ||
827 | exit_put_device: | |
828 | usb_put_dev(usb_dev); | |
829 | ||
830 | usb_set_intfdata(usb_intf, NULL); | |
831 | ||
832 | return retval; | |
833 | } | |
834 | EXPORT_SYMBOL_GPL(rt2x00usb_probe); | |
835 | ||
836 | void rt2x00usb_disconnect(struct usb_interface *usb_intf) | |
837 | { | |
838 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
839 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
840 | ||
841 | /* | |
842 | * Free all allocated data. | |
843 | */ | |
844 | rt2x00lib_remove_dev(rt2x00dev); | |
845 | rt2x00usb_free_reg(rt2x00dev); | |
846 | ieee80211_free_hw(hw); | |
847 | ||
848 | /* | |
849 | * Free the USB device data. | |
850 | */ | |
851 | usb_set_intfdata(usb_intf, NULL); | |
852 | usb_put_dev(interface_to_usbdev(usb_intf)); | |
853 | } | |
854 | EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); | |
855 | ||
856 | #ifdef CONFIG_PM | |
857 | int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) | |
858 | { | |
859 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
860 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 | 861 | |
543cc38c | 862 | return rt2x00lib_suspend(rt2x00dev, state); |
95ea3627 ID |
863 | } |
864 | EXPORT_SYMBOL_GPL(rt2x00usb_suspend); | |
865 | ||
866 | int rt2x00usb_resume(struct usb_interface *usb_intf) | |
867 | { | |
868 | struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); | |
869 | struct rt2x00_dev *rt2x00dev = hw->priv; | |
95ea3627 | 870 | |
499a214c | 871 | return rt2x00lib_resume(rt2x00dev); |
95ea3627 ID |
872 | } |
873 | EXPORT_SYMBOL_GPL(rt2x00usb_resume); | |
874 | #endif /* CONFIG_PM */ | |
875 | ||
876 | /* | |
181d6902 | 877 | * rt2x00usb module information. |
95ea3627 ID |
878 | */ |
879 | MODULE_AUTHOR(DRV_PROJECT); | |
880 | MODULE_VERSION(DRV_VERSION); | |
181d6902 | 881 | MODULE_DESCRIPTION("rt2x00 usb library"); |
95ea3627 | 882 | MODULE_LICENSE("GPL"); |