Linux 4.16.11
[linux/fpc-iii.git] / drivers / net / wireless / ralink / rt2x00 / rt2x00usb.c
blob086aad22743dc6892ad25395275ae90df0c001fb
1 /*
2 Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
3 Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
4 <http://rt2x00.serialmonkey.com>
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.
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.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, see <http://www.gnu.org/licenses/>.
21 Module: rt2x00usb
22 Abstract: rt2x00 generic usb device routines.
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/usb.h>
29 #include <linux/bug.h>
31 #include "rt2x00.h"
32 #include "rt2x00usb.h"
35 * Interfacing with the HW.
37 int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
38 const u8 request, const u8 requesttype,
39 const u16 offset, const u16 value,
40 void *buffer, const u16 buffer_length,
41 const int timeout)
43 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
44 int status;
45 unsigned int pipe =
46 (requesttype == USB_VENDOR_REQUEST_IN) ?
47 usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
48 unsigned long expire = jiffies + msecs_to_jiffies(timeout);
50 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
51 return -ENODEV;
53 do {
54 status = usb_control_msg(usb_dev, pipe, request, requesttype,
55 value, offset, buffer, buffer_length,
56 timeout / 2);
57 if (status >= 0)
58 return 0;
60 if (status == -ENODEV || status == -ENOENT) {
61 /* Device has disappeared. */
62 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
63 break;
65 } while (time_before(jiffies, expire));
67 rt2x00_err(rt2x00dev,
68 "Vendor Request 0x%02x failed for offset 0x%04x with error %d\n",
69 request, offset, status);
71 return status;
73 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
75 int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev,
76 const u8 request, const u8 requesttype,
77 const u16 offset, void *buffer,
78 const u16 buffer_length, const int timeout)
80 int status;
82 BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex));
85 * Check for Cache availability.
87 if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) {
88 rt2x00_err(rt2x00dev, "CSR cache not available\n");
89 return -ENOMEM;
92 if (requesttype == USB_VENDOR_REQUEST_OUT)
93 memcpy(rt2x00dev->csr.cache, buffer, buffer_length);
95 status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype,
96 offset, 0, rt2x00dev->csr.cache,
97 buffer_length, timeout);
99 if (!status && requesttype == USB_VENDOR_REQUEST_IN)
100 memcpy(buffer, rt2x00dev->csr.cache, buffer_length);
102 return status;
104 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock);
106 int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev,
107 const u8 request, const u8 requesttype,
108 const u16 offset, void *buffer,
109 const u16 buffer_length)
111 int status = 0;
112 unsigned char *tb;
113 u16 off, len, bsize;
115 mutex_lock(&rt2x00dev->csr_mutex);
117 tb = (char *)buffer;
118 off = offset;
119 len = buffer_length;
120 while (len && !status) {
121 bsize = min_t(u16, CSR_CACHE_SIZE, len);
122 status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
123 requesttype, off, tb,
124 bsize, REGISTER_TIMEOUT);
126 tb += bsize;
127 len -= bsize;
128 off += bsize;
131 mutex_unlock(&rt2x00dev->csr_mutex);
133 return status;
135 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff);
137 int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
138 const unsigned int offset,
139 const struct rt2x00_field32 field,
140 u32 *reg)
142 unsigned int i;
144 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
145 return -ENODEV;
147 for (i = 0; i < REGISTER_USB_BUSY_COUNT; i++) {
148 *reg = rt2x00usb_register_read_lock(rt2x00dev, offset);
149 if (!rt2x00_get_field32(*reg, field))
150 return 1;
151 udelay(REGISTER_BUSY_DELAY);
154 rt2x00_err(rt2x00dev, "Indirect register access failed: offset=0x%.08x, value=0x%.08x\n",
155 offset, *reg);
156 *reg = ~0;
158 return 0;
160 EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read);
163 struct rt2x00_async_read_data {
164 __le32 reg;
165 struct usb_ctrlrequest cr;
166 struct rt2x00_dev *rt2x00dev;
167 bool (*callback)(struct rt2x00_dev *, int, u32);
170 static void rt2x00usb_register_read_async_cb(struct urb *urb)
172 struct rt2x00_async_read_data *rd = urb->context;
173 if (rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg))) {
174 usb_anchor_urb(urb, rd->rt2x00dev->anchor);
175 if (usb_submit_urb(urb, GFP_ATOMIC) < 0) {
176 usb_unanchor_urb(urb);
177 kfree(rd);
179 } else
180 kfree(rd);
183 void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
184 const unsigned int offset,
185 bool (*callback)(struct rt2x00_dev*, int, u32))
187 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
188 struct urb *urb;
189 struct rt2x00_async_read_data *rd;
191 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
192 if (!rd)
193 return;
195 urb = usb_alloc_urb(0, GFP_ATOMIC);
196 if (!urb) {
197 kfree(rd);
198 return;
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));
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 usb_anchor_urb(urb, rt2x00dev->anchor);
213 if (usb_submit_urb(urb, GFP_ATOMIC) < 0) {
214 usb_unanchor_urb(urb);
215 kfree(rd);
217 usb_free_urb(urb);
219 EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async);
222 * TX data handlers.
224 static void rt2x00usb_work_txdone_entry(struct queue_entry *entry)
227 * If the transfer to hardware succeeded, it does not mean the
228 * frame was send out correctly. It only means the frame
229 * was successfully pushed to the hardware, we have no
230 * way to determine the transmission status right now.
231 * (Only indirectly by looking at the failed TX counters
232 * in the register).
234 if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
235 rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE);
236 else
237 rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN);
240 static void rt2x00usb_work_txdone(struct work_struct *work)
242 struct rt2x00_dev *rt2x00dev =
243 container_of(work, struct rt2x00_dev, txdone_work);
244 struct data_queue *queue;
245 struct queue_entry *entry;
247 tx_queue_for_each(rt2x00dev, queue) {
248 while (!rt2x00queue_empty(queue)) {
249 entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
251 if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
252 !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
253 break;
255 rt2x00usb_work_txdone_entry(entry);
260 static void rt2x00usb_interrupt_txdone(struct urb *urb)
262 struct queue_entry *entry = (struct queue_entry *)urb->context;
263 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
265 if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
266 return;
268 * Check if the frame was correctly uploaded
270 if (urb->status)
271 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
273 * Report the frame as DMA done
275 rt2x00lib_dmadone(entry);
277 if (rt2x00dev->ops->lib->tx_dma_done)
278 rt2x00dev->ops->lib->tx_dma_done(entry);
280 * Schedule the delayed work for reading the TX status
281 * from the device.
283 if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_TXSTATUS_FIFO) ||
284 !kfifo_is_empty(&rt2x00dev->txstatus_fifo))
285 queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work);
288 static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void *data)
290 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
291 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
292 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
293 u32 length;
294 int status;
296 if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) ||
297 test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
298 return false;
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.
305 length = rt2x00dev->ops->lib->get_tx_data_len(entry);
307 status = skb_padto(entry->skb, length);
308 if (unlikely(status)) {
309 /* TODO: report something more appropriate than IO_FAILED. */
310 rt2x00_warn(rt2x00dev, "TX SKB padding error, out of memory\n");
311 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
312 rt2x00lib_dmadone(entry);
314 return false;
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);
322 status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
323 if (status) {
324 if (status == -ENODEV || status == -ENOENT)
325 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
326 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
327 rt2x00lib_dmadone(entry);
330 return false;
334 * RX data handlers.
336 static void rt2x00usb_work_rxdone(struct work_struct *work)
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];
344 while (!rt2x00queue_empty(rt2x00dev->rx)) {
345 entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE);
347 if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
348 !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
349 break;
352 * Fill in desc fields of the skb descriptor
354 skbdesc = get_skb_frame_desc(entry->skb);
355 skbdesc->desc = rxd;
356 skbdesc->desc_len = entry->queue->desc_size;
359 * Send the frame to rt2x00lib for further processing.
361 rt2x00lib_rxdone(entry, GFP_KERNEL);
365 static void rt2x00usb_interrupt_rxdone(struct urb *urb)
367 struct queue_entry *entry = (struct queue_entry *)urb->context;
368 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
370 if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
371 return;
374 * Report the frame as DMA done
376 rt2x00lib_dmadone(entry);
379 * Check if the received data is simply too small
380 * to be actually valid, or if the urb is signaling
381 * a problem.
383 if (urb->actual_length < entry->queue->desc_size || urb->status)
384 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
387 * Schedule the delayed work for reading the RX status
388 * from the device.
390 queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
393 static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void *data)
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;
400 if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
401 test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
402 return false;
404 rt2x00lib_dmastart(entry);
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);
411 status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
412 if (status) {
413 if (status == -ENODEV || status == -ENOENT)
414 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
415 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
416 rt2x00lib_dmadone(entry);
419 return false;
422 void rt2x00usb_kick_queue(struct data_queue *queue)
424 switch (queue->qid) {
425 case QID_AC_VO:
426 case QID_AC_VI:
427 case QID_AC_BE:
428 case QID_AC_BK:
429 if (!rt2x00queue_empty(queue))
430 rt2x00queue_for_each_entry(queue,
431 Q_INDEX_DONE,
432 Q_INDEX,
433 NULL,
434 rt2x00usb_kick_tx_entry);
435 break;
436 case QID_RX:
437 if (!rt2x00queue_full(queue))
438 rt2x00queue_for_each_entry(queue,
439 Q_INDEX,
440 Q_INDEX_DONE,
441 NULL,
442 rt2x00usb_kick_rx_entry);
443 break;
444 default:
445 break;
448 EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue);
450 static bool rt2x00usb_flush_entry(struct queue_entry *entry, void *data)
452 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
453 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
454 struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data;
456 if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
457 return false;
459 usb_kill_urb(entry_priv->urb);
462 * Kill guardian urb (if required by driver).
464 if ((entry->queue->qid == QID_BEACON) &&
465 (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD)))
466 usb_kill_urb(bcn_priv->guardian_urb);
468 return false;
471 void rt2x00usb_flush_queue(struct data_queue *queue, bool drop)
473 struct work_struct *completion;
474 unsigned int i;
476 if (drop)
477 rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL,
478 rt2x00usb_flush_entry);
481 * Obtain the queue completion handler
483 switch (queue->qid) {
484 case QID_AC_VO:
485 case QID_AC_VI:
486 case QID_AC_BE:
487 case QID_AC_BK:
488 completion = &queue->rt2x00dev->txdone_work;
489 break;
490 case QID_RX:
491 completion = &queue->rt2x00dev->rxdone_work;
492 break;
493 default:
494 return;
497 for (i = 0; i < 10; i++) {
499 * Check if the driver is already done, otherwise we
500 * have to sleep a little while to give the driver/hw
501 * the oppurtunity to complete interrupt process itself.
503 if (rt2x00queue_empty(queue))
504 break;
507 * Schedule the completion handler manually, when this
508 * worker function runs, it should cleanup the queue.
510 queue_work(queue->rt2x00dev->workqueue, completion);
513 * Wait for a little while to give the driver
514 * the oppurtunity to recover itself.
516 msleep(50);
519 EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue);
521 static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue)
523 rt2x00_warn(queue->rt2x00dev, "TX queue %d DMA timed out, invoke forced forced reset\n",
524 queue->qid);
526 rt2x00queue_stop_queue(queue);
527 rt2x00queue_flush_queue(queue, true);
528 rt2x00queue_start_queue(queue);
531 static int rt2x00usb_dma_timeout(struct data_queue *queue)
533 struct queue_entry *entry;
535 entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE);
536 return rt2x00queue_dma_timeout(entry);
539 void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
541 struct data_queue *queue;
543 tx_queue_for_each(rt2x00dev, queue) {
544 if (!rt2x00queue_empty(queue)) {
545 if (rt2x00usb_dma_timeout(queue))
546 rt2x00usb_watchdog_tx_dma(queue);
550 EXPORT_SYMBOL_GPL(rt2x00usb_watchdog);
553 * Radio handlers
555 void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
557 rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0,
558 REGISTER_TIMEOUT);
560 EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
563 * Device initialization handlers.
565 void rt2x00usb_clear_entry(struct queue_entry *entry)
567 entry->flags = 0;
569 if (entry->queue->qid == QID_RX)
570 rt2x00usb_kick_rx_entry(entry, NULL);
572 EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);
574 static void rt2x00usb_assign_endpoint(struct data_queue *queue,
575 struct usb_endpoint_descriptor *ep_desc)
577 struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev);
578 int pipe;
580 queue->usb_endpoint = usb_endpoint_num(ep_desc);
582 if (queue->qid == QID_RX) {
583 pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint);
584 queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0);
585 } else {
586 pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint);
587 queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1);
590 if (!queue->usb_maxpacket)
591 queue->usb_maxpacket = 1;
594 static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev)
596 struct usb_interface *intf = to_usb_interface(rt2x00dev->dev);
597 struct usb_host_interface *intf_desc = intf->cur_altsetting;
598 struct usb_endpoint_descriptor *ep_desc;
599 struct data_queue *queue = rt2x00dev->tx;
600 struct usb_endpoint_descriptor *tx_ep_desc = NULL;
601 unsigned int i;
604 * Walk through all available endpoints to search for "bulk in"
605 * and "bulk out" endpoints. When we find such endpoints collect
606 * the information we need from the descriptor and assign it
607 * to the queue.
609 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
610 ep_desc = &intf_desc->endpoint[i].desc;
612 if (usb_endpoint_is_bulk_in(ep_desc)) {
613 rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc);
614 } else if (usb_endpoint_is_bulk_out(ep_desc) &&
615 (queue != queue_end(rt2x00dev))) {
616 rt2x00usb_assign_endpoint(queue, ep_desc);
617 queue = queue_next(queue);
619 tx_ep_desc = ep_desc;
624 * At least 1 endpoint for RX and 1 endpoint for TX must be available.
626 if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) {
627 rt2x00_err(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n");
628 return -EPIPE;
632 * It might be possible not all queues have a dedicated endpoint.
633 * Loop through all TX queues and copy the endpoint information
634 * which we have gathered from already assigned endpoints.
636 txall_queue_for_each(rt2x00dev, queue) {
637 if (!queue->usb_endpoint)
638 rt2x00usb_assign_endpoint(queue, tx_ep_desc);
641 return 0;
644 static int rt2x00usb_alloc_entries(struct data_queue *queue)
646 struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
647 struct queue_entry_priv_usb *entry_priv;
648 struct queue_entry_priv_usb_bcn *bcn_priv;
649 unsigned int i;
651 for (i = 0; i < queue->limit; i++) {
652 entry_priv = queue->entries[i].priv_data;
653 entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL);
654 if (!entry_priv->urb)
655 return -ENOMEM;
659 * If this is not the beacon queue or
660 * no guardian byte was required for the beacon,
661 * then we are done.
663 if (queue->qid != QID_BEACON ||
664 !rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
665 return 0;
667 for (i = 0; i < queue->limit; i++) {
668 bcn_priv = queue->entries[i].priv_data;
669 bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL);
670 if (!bcn_priv->guardian_urb)
671 return -ENOMEM;
674 return 0;
677 static void rt2x00usb_free_entries(struct data_queue *queue)
679 struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
680 struct queue_entry_priv_usb *entry_priv;
681 struct queue_entry_priv_usb_bcn *bcn_priv;
682 unsigned int i;
684 if (!queue->entries)
685 return;
687 for (i = 0; i < queue->limit; i++) {
688 entry_priv = queue->entries[i].priv_data;
689 usb_kill_urb(entry_priv->urb);
690 usb_free_urb(entry_priv->urb);
694 * If this is not the beacon queue or
695 * no guardian byte was required for the beacon,
696 * then we are done.
698 if (queue->qid != QID_BEACON ||
699 !rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
700 return;
702 for (i = 0; i < queue->limit; i++) {
703 bcn_priv = queue->entries[i].priv_data;
704 usb_kill_urb(bcn_priv->guardian_urb);
705 usb_free_urb(bcn_priv->guardian_urb);
709 int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
711 struct data_queue *queue;
712 int status;
715 * Find endpoints for each queue
717 status = rt2x00usb_find_endpoints(rt2x00dev);
718 if (status)
719 goto exit;
722 * Allocate DMA
724 queue_for_each(rt2x00dev, queue) {
725 status = rt2x00usb_alloc_entries(queue);
726 if (status)
727 goto exit;
730 return 0;
732 exit:
733 rt2x00usb_uninitialize(rt2x00dev);
735 return status;
737 EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
739 void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
741 struct data_queue *queue;
743 usb_kill_anchored_urbs(rt2x00dev->anchor);
744 hrtimer_cancel(&rt2x00dev->txstatus_timer);
745 cancel_work_sync(&rt2x00dev->rxdone_work);
746 cancel_work_sync(&rt2x00dev->txdone_work);
748 queue_for_each(rt2x00dev, queue)
749 rt2x00usb_free_entries(queue);
751 EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);
754 * USB driver handlers.
756 static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev)
758 kfree(rt2x00dev->rf);
759 rt2x00dev->rf = NULL;
761 kfree(rt2x00dev->eeprom);
762 rt2x00dev->eeprom = NULL;
764 kfree(rt2x00dev->csr.cache);
765 rt2x00dev->csr.cache = NULL;
768 static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
770 rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL);
771 if (!rt2x00dev->csr.cache)
772 goto exit;
774 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
775 if (!rt2x00dev->eeprom)
776 goto exit;
778 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
779 if (!rt2x00dev->rf)
780 goto exit;
782 return 0;
784 exit:
785 rt2x00_probe_err("Failed to allocate registers\n");
787 rt2x00usb_free_reg(rt2x00dev);
789 return -ENOMEM;
792 int rt2x00usb_probe(struct usb_interface *usb_intf,
793 const struct rt2x00_ops *ops)
795 struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
796 struct ieee80211_hw *hw;
797 struct rt2x00_dev *rt2x00dev;
798 int retval;
800 usb_dev = usb_get_dev(usb_dev);
801 usb_reset_device(usb_dev);
803 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
804 if (!hw) {
805 rt2x00_probe_err("Failed to allocate hardware\n");
806 retval = -ENOMEM;
807 goto exit_put_device;
810 usb_set_intfdata(usb_intf, hw);
812 rt2x00dev = hw->priv;
813 rt2x00dev->dev = &usb_intf->dev;
814 rt2x00dev->ops = ops;
815 rt2x00dev->hw = hw;
817 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
819 INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone);
820 INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone);
821 hrtimer_init(&rt2x00dev->txstatus_timer, CLOCK_MONOTONIC,
822 HRTIMER_MODE_REL);
824 retval = rt2x00usb_alloc_reg(rt2x00dev);
825 if (retval)
826 goto exit_free_device;
828 rt2x00dev->anchor = devm_kmalloc(&usb_dev->dev,
829 sizeof(struct usb_anchor),
830 GFP_KERNEL);
831 if (!rt2x00dev->anchor) {
832 retval = -ENOMEM;
833 goto exit_free_reg;
835 init_usb_anchor(rt2x00dev->anchor);
837 retval = rt2x00lib_probe_dev(rt2x00dev);
838 if (retval)
839 goto exit_free_anchor;
841 return 0;
843 exit_free_anchor:
844 usb_kill_anchored_urbs(rt2x00dev->anchor);
846 exit_free_reg:
847 rt2x00usb_free_reg(rt2x00dev);
849 exit_free_device:
850 ieee80211_free_hw(hw);
852 exit_put_device:
853 usb_put_dev(usb_dev);
855 usb_set_intfdata(usb_intf, NULL);
857 return retval;
859 EXPORT_SYMBOL_GPL(rt2x00usb_probe);
861 void rt2x00usb_disconnect(struct usb_interface *usb_intf)
863 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
864 struct rt2x00_dev *rt2x00dev = hw->priv;
867 * Free all allocated data.
869 rt2x00lib_remove_dev(rt2x00dev);
870 rt2x00usb_free_reg(rt2x00dev);
871 ieee80211_free_hw(hw);
874 * Free the USB device data.
876 usb_set_intfdata(usb_intf, NULL);
877 usb_put_dev(interface_to_usbdev(usb_intf));
879 EXPORT_SYMBOL_GPL(rt2x00usb_disconnect);
881 #ifdef CONFIG_PM
882 int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state)
884 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
885 struct rt2x00_dev *rt2x00dev = hw->priv;
887 return rt2x00lib_suspend(rt2x00dev, state);
889 EXPORT_SYMBOL_GPL(rt2x00usb_suspend);
891 int rt2x00usb_resume(struct usb_interface *usb_intf)
893 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
894 struct rt2x00_dev *rt2x00dev = hw->priv;
896 return rt2x00lib_resume(rt2x00dev);
898 EXPORT_SYMBOL_GPL(rt2x00usb_resume);
899 #endif /* CONFIG_PM */
902 * rt2x00usb module information.
904 MODULE_AUTHOR(DRV_PROJECT);
905 MODULE_VERSION(DRV_VERSION);
906 MODULE_DESCRIPTION("rt2x00 usb library");
907 MODULE_LICENSE("GPL");