Linux 4.4.145
[linux/fpc-iii.git] / drivers / net / wireless / rt2x00 / rt2x00usb.c
blob7627af6098eb5896420ef99bbfcc5c022f116d39
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) {
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 rt2x00usb_register_read_lock(rt2x00dev, offset, reg);
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 if (usb_submit_urb(urb, GFP_ATOMIC) < 0)
175 kfree(rd);
176 } else
177 kfree(rd);
180 void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
181 const unsigned int offset,
182 bool (*callback)(struct rt2x00_dev*, int, u32))
184 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
185 struct urb *urb;
186 struct rt2x00_async_read_data *rd;
188 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
189 if (!rd)
190 return;
192 urb = usb_alloc_urb(0, GFP_ATOMIC);
193 if (!urb) {
194 kfree(rd);
195 return;
198 rd->rt2x00dev = rt2x00dev;
199 rd->callback = callback;
200 rd->cr.bRequestType = USB_VENDOR_REQUEST_IN;
201 rd->cr.bRequest = USB_MULTI_READ;
202 rd->cr.wValue = 0;
203 rd->cr.wIndex = cpu_to_le16(offset);
204 rd->cr.wLength = cpu_to_le16(sizeof(u32));
206 usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0),
207 (unsigned char *)(&rd->cr), &rd->reg, sizeof(rd->reg),
208 rt2x00usb_register_read_async_cb, rd);
209 if (usb_submit_urb(urb, GFP_ATOMIC) < 0)
210 kfree(rd);
211 usb_free_urb(urb);
213 EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async);
216 * TX data handlers.
218 static void rt2x00usb_work_txdone_entry(struct queue_entry *entry)
221 * If the transfer to hardware succeeded, it does not mean the
222 * frame was send out correctly. It only means the frame
223 * was successfully pushed to the hardware, we have no
224 * way to determine the transmission status right now.
225 * (Only indirectly by looking at the failed TX counters
226 * in the register).
228 if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
229 rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE);
230 else
231 rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN);
234 static void rt2x00usb_work_txdone(struct work_struct *work)
236 struct rt2x00_dev *rt2x00dev =
237 container_of(work, struct rt2x00_dev, txdone_work);
238 struct data_queue *queue;
239 struct queue_entry *entry;
241 tx_queue_for_each(rt2x00dev, queue) {
242 while (!rt2x00queue_empty(queue)) {
243 entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
245 if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
246 !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
247 break;
249 rt2x00usb_work_txdone_entry(entry);
254 static void rt2x00usb_interrupt_txdone(struct urb *urb)
256 struct queue_entry *entry = (struct queue_entry *)urb->context;
257 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
259 if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
260 return;
262 * Check if the frame was correctly uploaded
264 if (urb->status)
265 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
267 * Report the frame as DMA done
269 rt2x00lib_dmadone(entry);
271 if (rt2x00dev->ops->lib->tx_dma_done)
272 rt2x00dev->ops->lib->tx_dma_done(entry);
274 * Schedule the delayed work for reading the TX status
275 * from the device.
277 if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_TXSTATUS_FIFO) ||
278 !kfifo_is_empty(&rt2x00dev->txstatus_fifo))
279 queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work);
282 static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void *data)
284 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
285 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
286 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
287 u32 length;
288 int status;
290 if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) ||
291 test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
292 return false;
295 * USB devices require certain padding at the end of each frame
296 * and urb. Those paddings are not included in skbs. Pass entry
297 * to the driver to determine what the overall length should be.
299 length = rt2x00dev->ops->lib->get_tx_data_len(entry);
301 status = skb_padto(entry->skb, length);
302 if (unlikely(status)) {
303 /* TODO: report something more appropriate than IO_FAILED. */
304 rt2x00_warn(rt2x00dev, "TX SKB padding error, out of memory\n");
305 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
306 rt2x00lib_dmadone(entry);
308 return false;
311 usb_fill_bulk_urb(entry_priv->urb, usb_dev,
312 usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint),
313 entry->skb->data, length,
314 rt2x00usb_interrupt_txdone, entry);
316 status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
317 if (status) {
318 if (status == -ENODEV)
319 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
320 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
321 rt2x00lib_dmadone(entry);
324 return false;
328 * RX data handlers.
330 static void rt2x00usb_work_rxdone(struct work_struct *work)
332 struct rt2x00_dev *rt2x00dev =
333 container_of(work, struct rt2x00_dev, rxdone_work);
334 struct queue_entry *entry;
335 struct skb_frame_desc *skbdesc;
336 u8 rxd[32];
338 while (!rt2x00queue_empty(rt2x00dev->rx)) {
339 entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE);
341 if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
342 !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
343 break;
346 * Fill in desc fields of the skb descriptor
348 skbdesc = get_skb_frame_desc(entry->skb);
349 skbdesc->desc = rxd;
350 skbdesc->desc_len = entry->queue->desc_size;
353 * Send the frame to rt2x00lib for further processing.
355 rt2x00lib_rxdone(entry, GFP_KERNEL);
359 static void rt2x00usb_interrupt_rxdone(struct urb *urb)
361 struct queue_entry *entry = (struct queue_entry *)urb->context;
362 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
364 if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
365 return;
368 * Report the frame as DMA done
370 rt2x00lib_dmadone(entry);
373 * Check if the received data is simply too small
374 * to be actually valid, or if the urb is signaling
375 * a problem.
377 if (urb->actual_length < entry->queue->desc_size || urb->status)
378 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
381 * Schedule the delayed work for reading the RX status
382 * from the device.
384 queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
387 static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void *data)
389 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
390 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
391 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
392 int status;
394 if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
395 test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
396 return false;
398 rt2x00lib_dmastart(entry);
400 usb_fill_bulk_urb(entry_priv->urb, usb_dev,
401 usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint),
402 entry->skb->data, entry->skb->len,
403 rt2x00usb_interrupt_rxdone, entry);
405 status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
406 if (status) {
407 if (status == -ENODEV)
408 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
409 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
410 rt2x00lib_dmadone(entry);
413 return false;
416 void rt2x00usb_kick_queue(struct data_queue *queue)
418 switch (queue->qid) {
419 case QID_AC_VO:
420 case QID_AC_VI:
421 case QID_AC_BE:
422 case QID_AC_BK:
423 if (!rt2x00queue_empty(queue))
424 rt2x00queue_for_each_entry(queue,
425 Q_INDEX_DONE,
426 Q_INDEX,
427 NULL,
428 rt2x00usb_kick_tx_entry);
429 break;
430 case QID_RX:
431 if (!rt2x00queue_full(queue))
432 rt2x00queue_for_each_entry(queue,
433 Q_INDEX,
434 Q_INDEX_DONE,
435 NULL,
436 rt2x00usb_kick_rx_entry);
437 break;
438 default:
439 break;
442 EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue);
444 static bool rt2x00usb_flush_entry(struct queue_entry *entry, void *data)
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;
450 if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
451 return false;
453 usb_kill_urb(entry_priv->urb);
456 * Kill guardian urb (if required by driver).
458 if ((entry->queue->qid == QID_BEACON) &&
459 (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD)))
460 usb_kill_urb(bcn_priv->guardian_urb);
462 return false;
465 void rt2x00usb_flush_queue(struct data_queue *queue, bool drop)
467 struct work_struct *completion;
468 unsigned int i;
470 if (drop)
471 rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL,
472 rt2x00usb_flush_entry);
475 * Obtain the queue completion handler
477 switch (queue->qid) {
478 case QID_AC_VO:
479 case QID_AC_VI:
480 case QID_AC_BE:
481 case QID_AC_BK:
482 completion = &queue->rt2x00dev->txdone_work;
483 break;
484 case QID_RX:
485 completion = &queue->rt2x00dev->rxdone_work;
486 break;
487 default:
488 return;
491 for (i = 0; i < 10; i++) {
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.
497 if (rt2x00queue_empty(queue))
498 break;
501 * Schedule the completion handler manually, when this
502 * worker function runs, it should cleanup the queue.
504 queue_work(queue->rt2x00dev->workqueue, completion);
507 * Wait for a little while to give the driver
508 * the oppurtunity to recover itself.
510 msleep(10);
513 EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue);
515 static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue)
517 rt2x00_warn(queue->rt2x00dev, "TX queue %d DMA timed out, invoke forced forced reset\n",
518 queue->qid);
520 rt2x00queue_stop_queue(queue);
521 rt2x00queue_flush_queue(queue, true);
522 rt2x00queue_start_queue(queue);
525 static int rt2x00usb_dma_timeout(struct data_queue *queue)
527 struct queue_entry *entry;
529 entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE);
530 return rt2x00queue_dma_timeout(entry);
533 void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
535 struct data_queue *queue;
537 tx_queue_for_each(rt2x00dev, queue) {
538 if (!rt2x00queue_empty(queue)) {
539 if (rt2x00usb_dma_timeout(queue))
540 rt2x00usb_watchdog_tx_dma(queue);
544 EXPORT_SYMBOL_GPL(rt2x00usb_watchdog);
547 * Radio handlers
549 void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
551 rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0,
552 REGISTER_TIMEOUT);
554 EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
557 * Device initialization handlers.
559 void rt2x00usb_clear_entry(struct queue_entry *entry)
561 entry->flags = 0;
563 if (entry->queue->qid == QID_RX)
564 rt2x00usb_kick_rx_entry(entry, NULL);
566 EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);
568 static void rt2x00usb_assign_endpoint(struct data_queue *queue,
569 struct usb_endpoint_descriptor *ep_desc)
571 struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev);
572 int pipe;
574 queue->usb_endpoint = usb_endpoint_num(ep_desc);
576 if (queue->qid == QID_RX) {
577 pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint);
578 queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0);
579 } else {
580 pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint);
581 queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1);
584 if (!queue->usb_maxpacket)
585 queue->usb_maxpacket = 1;
588 static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev)
590 struct usb_interface *intf = to_usb_interface(rt2x00dev->dev);
591 struct usb_host_interface *intf_desc = intf->cur_altsetting;
592 struct usb_endpoint_descriptor *ep_desc;
593 struct data_queue *queue = rt2x00dev->tx;
594 struct usb_endpoint_descriptor *tx_ep_desc = NULL;
595 unsigned int i;
598 * Walk through all available endpoints to search for "bulk in"
599 * and "bulk out" endpoints. When we find such endpoints collect
600 * the information we need from the descriptor and assign it
601 * to the queue.
603 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
604 ep_desc = &intf_desc->endpoint[i].desc;
606 if (usb_endpoint_is_bulk_in(ep_desc)) {
607 rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc);
608 } else if (usb_endpoint_is_bulk_out(ep_desc) &&
609 (queue != queue_end(rt2x00dev))) {
610 rt2x00usb_assign_endpoint(queue, ep_desc);
611 queue = queue_next(queue);
613 tx_ep_desc = ep_desc;
618 * At least 1 endpoint for RX and 1 endpoint for TX must be available.
620 if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) {
621 rt2x00_err(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n");
622 return -EPIPE;
626 * It might be possible not all queues have a dedicated endpoint.
627 * Loop through all TX queues and copy the endpoint information
628 * which we have gathered from already assigned endpoints.
630 txall_queue_for_each(rt2x00dev, queue) {
631 if (!queue->usb_endpoint)
632 rt2x00usb_assign_endpoint(queue, tx_ep_desc);
635 return 0;
638 static int rt2x00usb_alloc_entries(struct data_queue *queue)
640 struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
641 struct queue_entry_priv_usb *entry_priv;
642 struct queue_entry_priv_usb_bcn *bcn_priv;
643 unsigned int i;
645 for (i = 0; i < queue->limit; i++) {
646 entry_priv = queue->entries[i].priv_data;
647 entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL);
648 if (!entry_priv->urb)
649 return -ENOMEM;
653 * If this is not the beacon queue or
654 * no guardian byte was required for the beacon,
655 * then we are done.
657 if (queue->qid != QID_BEACON ||
658 !rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
659 return 0;
661 for (i = 0; i < queue->limit; i++) {
662 bcn_priv = queue->entries[i].priv_data;
663 bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL);
664 if (!bcn_priv->guardian_urb)
665 return -ENOMEM;
668 return 0;
671 static void rt2x00usb_free_entries(struct data_queue *queue)
673 struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
674 struct queue_entry_priv_usb *entry_priv;
675 struct queue_entry_priv_usb_bcn *bcn_priv;
676 unsigned int i;
678 if (!queue->entries)
679 return;
681 for (i = 0; i < queue->limit; i++) {
682 entry_priv = queue->entries[i].priv_data;
683 usb_kill_urb(entry_priv->urb);
684 usb_free_urb(entry_priv->urb);
688 * If this is not the beacon queue or
689 * no guardian byte was required for the beacon,
690 * then we are done.
692 if (queue->qid != QID_BEACON ||
693 !rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
694 return;
696 for (i = 0; i < queue->limit; i++) {
697 bcn_priv = queue->entries[i].priv_data;
698 usb_kill_urb(bcn_priv->guardian_urb);
699 usb_free_urb(bcn_priv->guardian_urb);
703 int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
705 struct data_queue *queue;
706 int status;
709 * Find endpoints for each queue
711 status = rt2x00usb_find_endpoints(rt2x00dev);
712 if (status)
713 goto exit;
716 * Allocate DMA
718 queue_for_each(rt2x00dev, queue) {
719 status = rt2x00usb_alloc_entries(queue);
720 if (status)
721 goto exit;
724 return 0;
726 exit:
727 rt2x00usb_uninitialize(rt2x00dev);
729 return status;
731 EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
733 void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
735 struct data_queue *queue;
737 queue_for_each(rt2x00dev, queue)
738 rt2x00usb_free_entries(queue);
740 EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);
743 * USB driver handlers.
745 static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev)
747 kfree(rt2x00dev->rf);
748 rt2x00dev->rf = NULL;
750 kfree(rt2x00dev->eeprom);
751 rt2x00dev->eeprom = NULL;
753 kfree(rt2x00dev->csr.cache);
754 rt2x00dev->csr.cache = NULL;
757 static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
759 rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL);
760 if (!rt2x00dev->csr.cache)
761 goto exit;
763 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
764 if (!rt2x00dev->eeprom)
765 goto exit;
767 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
768 if (!rt2x00dev->rf)
769 goto exit;
771 return 0;
773 exit:
774 rt2x00_probe_err("Failed to allocate registers\n");
776 rt2x00usb_free_reg(rt2x00dev);
778 return -ENOMEM;
781 int rt2x00usb_probe(struct usb_interface *usb_intf,
782 const struct rt2x00_ops *ops)
784 struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
785 struct ieee80211_hw *hw;
786 struct rt2x00_dev *rt2x00dev;
787 int retval;
789 usb_dev = usb_get_dev(usb_dev);
790 usb_reset_device(usb_dev);
792 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
793 if (!hw) {
794 rt2x00_probe_err("Failed to allocate hardware\n");
795 retval = -ENOMEM;
796 goto exit_put_device;
799 usb_set_intfdata(usb_intf, hw);
801 rt2x00dev = hw->priv;
802 rt2x00dev->dev = &usb_intf->dev;
803 rt2x00dev->ops = ops;
804 rt2x00dev->hw = hw;
806 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
808 INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone);
809 INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone);
810 hrtimer_init(&rt2x00dev->txstatus_timer, CLOCK_MONOTONIC,
811 HRTIMER_MODE_REL);
813 retval = rt2x00usb_alloc_reg(rt2x00dev);
814 if (retval)
815 goto exit_free_device;
817 retval = rt2x00lib_probe_dev(rt2x00dev);
818 if (retval)
819 goto exit_free_reg;
821 return 0;
823 exit_free_reg:
824 rt2x00usb_free_reg(rt2x00dev);
826 exit_free_device:
827 ieee80211_free_hw(hw);
829 exit_put_device:
830 usb_put_dev(usb_dev);
832 usb_set_intfdata(usb_intf, NULL);
834 return retval;
836 EXPORT_SYMBOL_GPL(rt2x00usb_probe);
838 void rt2x00usb_disconnect(struct usb_interface *usb_intf)
840 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
841 struct rt2x00_dev *rt2x00dev = hw->priv;
844 * Free all allocated data.
846 rt2x00lib_remove_dev(rt2x00dev);
847 rt2x00usb_free_reg(rt2x00dev);
848 ieee80211_free_hw(hw);
851 * Free the USB device data.
853 usb_set_intfdata(usb_intf, NULL);
854 usb_put_dev(interface_to_usbdev(usb_intf));
856 EXPORT_SYMBOL_GPL(rt2x00usb_disconnect);
858 #ifdef CONFIG_PM
859 int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state)
861 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
862 struct rt2x00_dev *rt2x00dev = hw->priv;
864 return rt2x00lib_suspend(rt2x00dev, state);
866 EXPORT_SYMBOL_GPL(rt2x00usb_suspend);
868 int rt2x00usb_resume(struct usb_interface *usb_intf)
870 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
871 struct rt2x00_dev *rt2x00dev = hw->priv;
873 return rt2x00lib_resume(rt2x00dev);
875 EXPORT_SYMBOL_GPL(rt2x00usb_resume);
876 #endif /* CONFIG_PM */
879 * rt2x00usb module information.
881 MODULE_AUTHOR(DRV_PROJECT);
882 MODULE_VERSION(DRV_VERSION);
883 MODULE_DESCRIPTION("rt2x00 usb library");
884 MODULE_LICENSE("GPL");