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, write to the
18 Free Software Foundation, Inc.,
19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 Abstract: rt2x00 generic usb device routines.
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/slab.h>
30 #include <linux/usb.h>
31 #include <linux/bug.h>
34 #include "rt2x00usb.h"
37 * Interfacing with the HW.
39 int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
40 const u8 request, const u8 requesttype,
41 const u16 offset, const u16 value,
42 void *buffer, const u16 buffer_length,
45 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
49 (requesttype == USB_VENDOR_REQUEST_IN) ?
50 usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
52 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
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,
64 * -ENODEV: Device has disappeared, no point continuing.
65 * All other errors: Try again.
67 else if (status == -ENODEV) {
68 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
74 "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n",
75 request, offset, status);
79 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
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)
88 BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex));
91 * Check for Cache availability.
93 if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) {
94 ERROR(rt2x00dev, "CSR cache not available.\n");
98 if (requesttype == USB_VENDOR_REQUEST_OUT)
99 memcpy(rt2x00dev->csr.cache, buffer, buffer_length);
101 status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype,
102 offset, 0, rt2x00dev->csr.cache,
103 buffer_length, timeout);
105 if (!status && requesttype == USB_VENDOR_REQUEST_IN)
106 memcpy(buffer, rt2x00dev->csr.cache, buffer_length);
110 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock);
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)
121 mutex_lock(&rt2x00dev->csr_mutex);
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,
137 mutex_unlock(&rt2x00dev->csr_mutex);
141 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff);
143 int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
144 const unsigned int offset,
145 const struct rt2x00_field32 field,
150 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
153 for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
154 rt2x00usb_register_read_lock(rt2x00dev, offset, reg);
155 if (!rt2x00_get_field32(*reg, field))
157 udelay(REGISTER_BUSY_DELAY);
160 ERROR(rt2x00dev, "Indirect register access failed: "
161 "offset=0x%.08x, value=0x%.08x\n", offset, *reg);
166 EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read);
169 struct rt2x00_async_read_data {
171 struct usb_ctrlrequest cr;
172 struct rt2x00_dev *rt2x00dev;
173 bool (*callback)(struct rt2x00_dev *, int, u32);
176 static void rt2x00usb_register_read_async_cb(struct urb *urb)
178 struct rt2x00_async_read_data *rd = urb->context;
179 if (rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg))) {
180 if (usb_submit_urb(urb, GFP_ATOMIC) < 0)
186 void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
187 const unsigned int offset,
188 bool (*callback)(struct rt2x00_dev*, int, u32))
190 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
192 struct rt2x00_async_read_data *rd;
194 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
198 urb = usb_alloc_urb(0, GFP_ATOMIC);
204 rd->rt2x00dev = rt2x00dev;
205 rd->callback = callback;
206 rd->cr.bRequestType = USB_VENDOR_REQUEST_IN;
207 rd->cr.bRequest = USB_MULTI_READ;
209 rd->cr.wIndex = cpu_to_le16(offset);
210 rd->cr.wLength = cpu_to_le16(sizeof(u32));
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)
219 EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async);
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
234 if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
235 rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE);
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))
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))
268 * Check if the frame was correctly uploaded
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
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);
288 static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry)
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;
296 if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) ||
297 test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
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 WARNING(rt2x00dev, "TX SKB padding error, out of memory\n");
311 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
312 rt2x00lib_dmadone(entry);
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);
324 if (status == -ENODEV)
325 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
326 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
327 rt2x00lib_dmadone(entry);
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;
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))
352 * Fill in desc fields of the skb descriptor
354 skbdesc = get_skb_frame_desc(entry->skb);
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))
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
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
390 queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
393 static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry)
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;
400 if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
401 test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
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);
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);
422 void rt2x00usb_kick_queue(struct data_queue *queue)
424 switch (queue->qid) {
429 if (!rt2x00queue_empty(queue))
430 rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX,
431 rt2x00usb_kick_tx_entry);
434 if (!rt2x00queue_full(queue))
435 rt2x00queue_for_each_entry(queue, Q_INDEX, Q_INDEX_DONE,
436 rt2x00usb_kick_rx_entry);
442 EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue);
444 static bool rt2x00usb_flush_entry(struct queue_entry *entry)
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))
453 usb_kill_urb(entry_priv->urb);
456 * Kill guardian urb (if required by driver).
458 if ((entry->queue->qid == QID_BEACON) &&
459 (test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)))
460 usb_kill_urb(bcn_priv->guardian_urb);
465 void rt2x00usb_flush_queue(struct data_queue *queue, bool drop)
467 struct work_struct *completion;
471 rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX,
472 rt2x00usb_flush_entry);
475 * Obtain the queue completion handler
477 switch (queue->qid) {
482 completion = &queue->rt2x00dev->txdone_work;
485 completion = &queue->rt2x00dev->rxdone_work;
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))
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.
513 EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue);
515 static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue)
517 WARNING(queue->rt2x00dev, "TX queue %d DMA timed out,"
518 " invoke forced forced reset\n", queue->qid);
520 rt2x00queue_flush_queue(queue, true);
523 static int rt2x00usb_dma_timeout(struct data_queue *queue)
525 struct queue_entry *entry;
527 entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE);
528 return rt2x00queue_dma_timeout(entry);
531 void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
533 struct data_queue *queue;
535 tx_queue_for_each(rt2x00dev, queue) {
536 if (!rt2x00queue_empty(queue)) {
537 if (rt2x00usb_dma_timeout(queue))
538 rt2x00usb_watchdog_tx_dma(queue);
542 EXPORT_SYMBOL_GPL(rt2x00usb_watchdog);
547 void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
549 rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0,
552 EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
555 * Device initialization handlers.
557 void rt2x00usb_clear_entry(struct queue_entry *entry)
561 if (entry->queue->qid == QID_RX)
562 rt2x00usb_kick_rx_entry(entry);
564 EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);
566 static void rt2x00usb_assign_endpoint(struct data_queue *queue,
567 struct usb_endpoint_descriptor *ep_desc)
569 struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev);
572 queue->usb_endpoint = usb_endpoint_num(ep_desc);
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);
578 pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint);
579 queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1);
582 if (!queue->usb_maxpacket)
583 queue->usb_maxpacket = 1;
586 static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev)
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;
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
601 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
602 ep_desc = &intf_desc->endpoint[i].desc;
604 if (usb_endpoint_is_bulk_in(ep_desc)) {
605 rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc);
606 } else if (usb_endpoint_is_bulk_out(ep_desc) &&
607 (queue != queue_end(rt2x00dev))) {
608 rt2x00usb_assign_endpoint(queue, ep_desc);
609 queue = queue_next(queue);
611 tx_ep_desc = ep_desc;
616 * At least 1 endpoint for RX and 1 endpoint for TX must be available.
618 if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) {
619 ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n");
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.
628 txall_queue_for_each(rt2x00dev, queue) {
629 if (!queue->usb_endpoint)
630 rt2x00usb_assign_endpoint(queue, tx_ep_desc);
636 static int rt2x00usb_alloc_entries(struct data_queue *queue)
638 struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
639 struct queue_entry_priv_usb *entry_priv;
640 struct queue_entry_priv_usb_bcn *bcn_priv;
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)
651 * If this is not the beacon queue or
652 * no guardian byte was required for the beacon,
655 if (queue->qid != QID_BEACON ||
656 !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))
659 for (i = 0; i < queue->limit; i++) {
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)
669 static void rt2x00usb_free_entries(struct data_queue *queue)
671 struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
672 struct queue_entry_priv_usb *entry_priv;
673 struct queue_entry_priv_usb_bcn *bcn_priv;
679 for (i = 0; i < queue->limit; i++) {
680 entry_priv = queue->entries[i].priv_data;
681 usb_kill_urb(entry_priv->urb);
682 usb_free_urb(entry_priv->urb);
686 * If this is not the beacon queue or
687 * no guardian byte was required for the beacon,
690 if (queue->qid != QID_BEACON ||
691 !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))
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);
701 int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
703 struct data_queue *queue;
707 * Find endpoints for each queue
709 status = rt2x00usb_find_endpoints(rt2x00dev);
716 queue_for_each(rt2x00dev, queue) {
717 status = rt2x00usb_alloc_entries(queue);
725 rt2x00usb_uninitialize(rt2x00dev);
729 EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
731 void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
733 struct data_queue *queue;
735 queue_for_each(rt2x00dev, queue)
736 rt2x00usb_free_entries(queue);
738 EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);
741 * USB driver handlers.
743 static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev)
745 kfree(rt2x00dev->rf);
746 rt2x00dev->rf = NULL;
748 kfree(rt2x00dev->eeprom);
749 rt2x00dev->eeprom = NULL;
751 kfree(rt2x00dev->csr.cache);
752 rt2x00dev->csr.cache = NULL;
755 static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
757 rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL);
758 if (!rt2x00dev->csr.cache)
761 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
762 if (!rt2x00dev->eeprom)
765 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
772 ERROR_PROBE("Failed to allocate registers.\n");
774 rt2x00usb_free_reg(rt2x00dev);
779 int rt2x00usb_probe(struct usb_interface *usb_intf,
780 const struct rt2x00_ops *ops)
782 struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
783 struct ieee80211_hw *hw;
784 struct rt2x00_dev *rt2x00dev;
787 usb_dev = usb_get_dev(usb_dev);
788 usb_reset_device(usb_dev);
790 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
792 ERROR_PROBE("Failed to allocate hardware.\n");
794 goto exit_put_device;
797 usb_set_intfdata(usb_intf, hw);
799 rt2x00dev = hw->priv;
800 rt2x00dev->dev = &usb_intf->dev;
801 rt2x00dev->ops = ops;
804 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
806 INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone);
807 INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone);
808 hrtimer_init(&rt2x00dev->txstatus_timer, CLOCK_MONOTONIC,
811 retval = rt2x00usb_alloc_reg(rt2x00dev);
813 goto exit_free_device;
815 retval = rt2x00lib_probe_dev(rt2x00dev);
822 rt2x00usb_free_reg(rt2x00dev);
825 ieee80211_free_hw(hw);
828 usb_put_dev(usb_dev);
830 usb_set_intfdata(usb_intf, NULL);
834 EXPORT_SYMBOL_GPL(rt2x00usb_probe);
836 void rt2x00usb_disconnect(struct usb_interface *usb_intf)
838 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
839 struct rt2x00_dev *rt2x00dev = hw->priv;
842 * Free all allocated data.
844 rt2x00lib_remove_dev(rt2x00dev);
845 rt2x00usb_free_reg(rt2x00dev);
846 ieee80211_free_hw(hw);
849 * Free the USB device data.
851 usb_set_intfdata(usb_intf, NULL);
852 usb_put_dev(interface_to_usbdev(usb_intf));
854 EXPORT_SYMBOL_GPL(rt2x00usb_disconnect);
857 int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state)
859 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
860 struct rt2x00_dev *rt2x00dev = hw->priv;
862 return rt2x00lib_suspend(rt2x00dev, state);
864 EXPORT_SYMBOL_GPL(rt2x00usb_suspend);
866 int rt2x00usb_resume(struct usb_interface *usb_intf)
868 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
869 struct rt2x00_dev *rt2x00dev = hw->priv;
871 return rt2x00lib_resume(rt2x00dev);
873 EXPORT_SYMBOL_GPL(rt2x00usb_resume);
874 #endif /* CONFIG_PM */
877 * rt2x00usb module information.
879 MODULE_AUTHOR(DRV_PROJECT);
880 MODULE_VERSION(DRV_VERSION);
881 MODULE_DESCRIPTION("rt2x00 usb library");
882 MODULE_LICENSE("GPL");