netfilter: xt_connlimit: fix regression caused by zero family value
[linux-3.10.git] / drivers / net / wireless / rt2x00 / rt2x00usb.c
1 /*
2         Copyright (C) 2004 - 2009 rt2x00 SourceForge Project
3         <http://rt2x00.serialmonkey.com>
4
5         This program is free software; you can redistribute it and/or modify
6         it under the terms of the GNU General Public License as published by
7         the Free Software Foundation; either version 2 of the License, or
8         (at your option) any later version.
9
10         This program is distributed in the hope that it will be useful,
11         but WITHOUT ANY WARRANTY; without even the implied warranty of
12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13         GNU General Public License for more details.
14
15         You should have received a copy of the GNU General Public License
16         along with this program; if not, write to the
17         Free Software Foundation, Inc.,
18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19  */
20
21 /*
22         Module: rt2x00usb
23         Abstract: rt2x00 generic usb device routines.
24  */
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/usb.h>
29 #include <linux/bug.h>
30
31 #include "rt2x00.h"
32 #include "rt2x00usb.h"
33
34 /*
35  * Interfacing with the HW.
36  */
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)
42 {
43         struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
44         int status;
45         unsigned int i;
46         unsigned int pipe =
47             (requesttype == USB_VENDOR_REQUEST_IN) ?
48             usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
49
50
51         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
52                 status = usb_control_msg(usb_dev, pipe, request, requesttype,
53                                          value, offset, buffer, buffer_length,
54                                          timeout);
55                 if (status >= 0)
56                         return 0;
57
58                 /*
59                  * Check for errors
60                  * -ENODEV: Device has disappeared, no point continuing.
61                  * All other errors: Try again.
62                  */
63                 else if (status == -ENODEV)
64                         break;
65         }
66
67         ERROR(rt2x00dev,
68               "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n",
69               request, offset, status);
70
71         return status;
72 }
73 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
74
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)
79 {
80         int status;
81
82         BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex));
83
84         /*
85          * Check for Cache availability.
86          */
87         if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) {
88                 ERROR(rt2x00dev, "CSR cache not available.\n");
89                 return -ENOMEM;
90         }
91
92         if (requesttype == USB_VENDOR_REQUEST_OUT)
93                 memcpy(rt2x00dev->csr.cache, buffer, buffer_length);
94
95         status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype,
96                                           offset, 0, rt2x00dev->csr.cache,
97                                           buffer_length, timeout);
98
99         if (!status && requesttype == USB_VENDOR_REQUEST_IN)
100                 memcpy(buffer, rt2x00dev->csr.cache, buffer_length);
101
102         return status;
103 }
104 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock);
105
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, const int timeout)
110 {
111         int status;
112
113         mutex_lock(&rt2x00dev->csr_mutex);
114
115         status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
116                                                 requesttype, offset, buffer,
117                                                 buffer_length, timeout);
118
119         mutex_unlock(&rt2x00dev->csr_mutex);
120
121         return status;
122 }
123 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff);
124
125 int rt2x00usb_vendor_request_large_buff(struct rt2x00_dev *rt2x00dev,
126                                         const u8 request, const u8 requesttype,
127                                         const u16 offset, const void *buffer,
128                                         const u16 buffer_length,
129                                         const int timeout)
130 {
131         int status = 0;
132         unsigned char *tb;
133         u16 off, len, bsize;
134
135         mutex_lock(&rt2x00dev->csr_mutex);
136
137         tb  = (char *)buffer;
138         off = offset;
139         len = buffer_length;
140         while (len && !status) {
141                 bsize = min_t(u16, CSR_CACHE_SIZE, len);
142                 status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
143                                                         requesttype, off, tb,
144                                                         bsize, timeout);
145
146                 tb  += bsize;
147                 len -= bsize;
148                 off += bsize;
149         }
150
151         mutex_unlock(&rt2x00dev->csr_mutex);
152
153         return status;
154 }
155 EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_large_buff);
156
157 int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
158                            const unsigned int offset,
159                            struct rt2x00_field32 field,
160                            u32 *reg)
161 {
162         unsigned int i;
163
164         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
165                 rt2x00usb_register_read_lock(rt2x00dev, offset, reg);
166                 if (!rt2x00_get_field32(*reg, field))
167                         return 1;
168                 udelay(REGISTER_BUSY_DELAY);
169         }
170
171         ERROR(rt2x00dev, "Indirect register access failed: "
172               "offset=0x%.08x, value=0x%.08x\n", offset, *reg);
173         *reg = ~0;
174
175         return 0;
176 }
177 EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read);
178
179 /*
180  * TX data handlers.
181  */
182 static void rt2x00usb_interrupt_txdone(struct urb *urb)
183 {
184         struct queue_entry *entry = (struct queue_entry *)urb->context;
185         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
186         struct txdone_entry_desc txdesc;
187
188         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) ||
189             !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
190                 return;
191
192         /*
193          * Obtain the status about this packet.
194          * Note that when the status is 0 it does not mean the
195          * frame was send out correctly. It only means the frame
196          * was succesfully pushed to the hardware, we have no
197          * way to determine the transmission status right now.
198          * (Only indirectly by looking at the failed TX counters
199          * in the register).
200          */
201         txdesc.flags = 0;
202         if (!urb->status)
203                 __set_bit(TXDONE_UNKNOWN, &txdesc.flags);
204         else
205                 __set_bit(TXDONE_FAILURE, &txdesc.flags);
206         txdesc.retry = 0;
207
208         rt2x00lib_txdone(entry, &txdesc);
209 }
210
211 int rt2x00usb_write_tx_data(struct queue_entry *entry)
212 {
213         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
214         struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
215         struct queue_entry_priv_usb *entry_priv = entry->priv_data;
216         struct skb_frame_desc *skbdesc;
217         u32 length;
218
219         /*
220          * Add the descriptor in front of the skb.
221          */
222         skb_push(entry->skb, entry->queue->desc_size);
223         memset(entry->skb->data, 0, entry->queue->desc_size);
224
225         /*
226          * Fill in skb descriptor
227          */
228         skbdesc = get_skb_frame_desc(entry->skb);
229         skbdesc->desc = entry->skb->data;
230         skbdesc->desc_len = entry->queue->desc_size;
231
232         /*
233          * USB devices cannot blindly pass the skb->len as the
234          * length of the data to usb_fill_bulk_urb. Pass the skb
235          * to the driver to determine what the length should be.
236          */
237         length = rt2x00dev->ops->lib->get_tx_data_len(entry);
238
239         usb_fill_bulk_urb(entry_priv->urb, usb_dev,
240                           usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint),
241                           entry->skb->data, length,
242                           rt2x00usb_interrupt_txdone, entry);
243
244         /*
245          * Make sure the skb->data pointer points to the frame, not the
246          * descriptor.
247          */
248         skb_pull(entry->skb, entry->queue->desc_size);
249
250         return 0;
251 }
252 EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data);
253
254 static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
255 {
256         struct queue_entry_priv_usb *entry_priv = entry->priv_data;
257
258         if (test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags))
259                 usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
260 }
261
262 void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
263                              const enum data_queue_qid qid)
264 {
265         struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid);
266         unsigned long irqflags;
267         unsigned int index;
268         unsigned int index_done;
269         unsigned int i;
270
271         /*
272          * Only protect the range we are going to loop over,
273          * if during our loop a extra entry is set to pending
274          * it should not be kicked during this run, since it
275          * is part of another TX operation.
276          */
277         spin_lock_irqsave(&queue->lock, irqflags);
278         index = queue->index[Q_INDEX];
279         index_done = queue->index[Q_INDEX_DONE];
280         spin_unlock_irqrestore(&queue->lock, irqflags);
281
282         /*
283          * Start from the TX done pointer, this guarentees that we will
284          * send out all frames in the correct order.
285          */
286         if (index_done < index) {
287                 for (i = index_done; i < index; i++)
288                         rt2x00usb_kick_tx_entry(&queue->entries[i]);
289         } else {
290                 for (i = index_done; i < queue->limit; i++)
291                         rt2x00usb_kick_tx_entry(&queue->entries[i]);
292
293                 for (i = 0; i < index; i++)
294                         rt2x00usb_kick_tx_entry(&queue->entries[i]);
295         }
296 }
297 EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue);
298
299 void rt2x00usb_kill_tx_queue(struct rt2x00_dev *rt2x00dev,
300                              const enum data_queue_qid qid)
301 {
302         struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid);
303         struct queue_entry_priv_usb *entry_priv;
304         struct queue_entry_priv_usb_bcn *bcn_priv;
305         unsigned int i;
306         bool kill_guard;
307
308         /*
309          * When killing the beacon queue, we must also kill
310          * the beacon guard byte.
311          */
312         kill_guard =
313             (qid == QID_BEACON) &&
314             (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags));
315
316         /*
317          * Cancel all entries.
318          */
319         for (i = 0; i < queue->limit; i++) {
320                 entry_priv = queue->entries[i].priv_data;
321                 usb_kill_urb(entry_priv->urb);
322
323                 /*
324                  * Kill guardian urb (if required by driver).
325                  */
326                 if (kill_guard) {
327                         bcn_priv = queue->entries[i].priv_data;
328                         usb_kill_urb(bcn_priv->guardian_urb);
329                 }
330         }
331 }
332 EXPORT_SYMBOL_GPL(rt2x00usb_kill_tx_queue);
333
334 /*
335  * RX data handlers.
336  */
337 static void rt2x00usb_interrupt_rxdone(struct urb *urb)
338 {
339         struct queue_entry *entry = (struct queue_entry *)urb->context;
340         struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
341         struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
342         u8 rxd[32];
343
344         if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) ||
345             !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
346                 return;
347
348         /*
349          * Check if the received data is simply too small
350          * to be actually valid, or if the urb is signaling
351          * a problem.
352          */
353         if (urb->actual_length < entry->queue->desc_size || urb->status) {
354                 set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
355                 usb_submit_urb(urb, GFP_ATOMIC);
356                 return;
357         }
358
359         /*
360          * Fill in desc fields of the skb descriptor
361          */
362         skbdesc->desc = rxd;
363         skbdesc->desc_len = entry->queue->desc_size;
364
365         /*
366          * Send the frame to rt2x00lib for further processing.
367          */
368         rt2x00lib_rxdone(rt2x00dev, entry);
369 }
370
371 /*
372  * Radio handlers
373  */
374 void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
375 {
376         rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0,
377                                     REGISTER_TIMEOUT);
378
379         /*
380          * The USB version of kill_tx_queue also works
381          * on the RX queue.
382          */
383         rt2x00dev->ops->lib->kill_tx_queue(rt2x00dev, QID_RX);
384 }
385 EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
386
387 /*
388  * Device initialization handlers.
389  */
390 void rt2x00usb_clear_entry(struct queue_entry *entry)
391 {
392         struct usb_device *usb_dev =
393             to_usb_device_intf(entry->queue->rt2x00dev->dev);
394         struct queue_entry_priv_usb *entry_priv = entry->priv_data;
395         int pipe;
396
397         if (entry->queue->qid == QID_RX) {
398                 pipe = usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint);
399                 usb_fill_bulk_urb(entry_priv->urb, usb_dev, pipe,
400                                 entry->skb->data, entry->skb->len,
401                                 rt2x00usb_interrupt_rxdone, entry);
402
403                 set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
404                 usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
405         } else {
406                 entry->flags = 0;
407         }
408 }
409 EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);
410
411 static void rt2x00usb_assign_endpoint(struct data_queue *queue,
412                                       struct usb_endpoint_descriptor *ep_desc)
413 {
414         struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev);
415         int pipe;
416
417         queue->usb_endpoint = usb_endpoint_num(ep_desc);
418
419         if (queue->qid == QID_RX) {
420                 pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint);
421                 queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0);
422         } else {
423                 pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint);
424                 queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1);
425         }
426
427         if (!queue->usb_maxpacket)
428                 queue->usb_maxpacket = 1;
429 }
430
431 static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev)
432 {
433         struct usb_interface *intf = to_usb_interface(rt2x00dev->dev);
434         struct usb_host_interface *intf_desc = intf->cur_altsetting;
435         struct usb_endpoint_descriptor *ep_desc;
436         struct data_queue *queue = rt2x00dev->tx;
437         struct usb_endpoint_descriptor *tx_ep_desc = NULL;
438         unsigned int i;
439
440         /*
441          * Walk through all available endpoints to search for "bulk in"
442          * and "bulk out" endpoints. When we find such endpoints collect
443          * the information we need from the descriptor and assign it
444          * to the queue.
445          */
446         for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
447                 ep_desc = &intf_desc->endpoint[i].desc;
448
449                 if (usb_endpoint_is_bulk_in(ep_desc)) {
450                         rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc);
451                 } else if (usb_endpoint_is_bulk_out(ep_desc) &&
452                            (queue != queue_end(rt2x00dev))) {
453                         rt2x00usb_assign_endpoint(queue, ep_desc);
454                         queue = queue_next(queue);
455
456                         tx_ep_desc = ep_desc;
457                 }
458         }
459
460         /*
461          * At least 1 endpoint for RX and 1 endpoint for TX must be available.
462          */
463         if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) {
464                 ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n");
465                 return -EPIPE;
466         }
467
468         /*
469          * It might be possible not all queues have a dedicated endpoint.
470          * Loop through all TX queues and copy the endpoint information
471          * which we have gathered from already assigned endpoints.
472          */
473         txall_queue_for_each(rt2x00dev, queue) {
474                 if (!queue->usb_endpoint)
475                         rt2x00usb_assign_endpoint(queue, tx_ep_desc);
476         }
477
478         return 0;
479 }
480
481 static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
482                                struct data_queue *queue)
483 {
484         struct queue_entry_priv_usb *entry_priv;
485         struct queue_entry_priv_usb_bcn *bcn_priv;
486         unsigned int i;
487
488         for (i = 0; i < queue->limit; i++) {
489                 entry_priv = queue->entries[i].priv_data;
490                 entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL);
491                 if (!entry_priv->urb)
492                         return -ENOMEM;
493         }
494
495         /*
496          * If this is not the beacon queue or
497          * no guardian byte was required for the beacon,
498          * then we are done.
499          */
500         if (rt2x00dev->bcn != queue ||
501             !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
502                 return 0;
503
504         for (i = 0; i < queue->limit; i++) {
505                 bcn_priv = queue->entries[i].priv_data;
506                 bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL);
507                 if (!bcn_priv->guardian_urb)
508                         return -ENOMEM;
509         }
510
511         return 0;
512 }
513
514 static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev,
515                                struct data_queue *queue)
516 {
517         struct queue_entry_priv_usb *entry_priv;
518         struct queue_entry_priv_usb_bcn *bcn_priv;
519         unsigned int i;
520
521         if (!queue->entries)
522                 return;
523
524         for (i = 0; i < queue->limit; i++) {
525                 entry_priv = queue->entries[i].priv_data;
526                 usb_kill_urb(entry_priv->urb);
527                 usb_free_urb(entry_priv->urb);
528         }
529
530         /*
531          * If this is not the beacon queue or
532          * no guardian byte was required for the beacon,
533          * then we are done.
534          */
535         if (rt2x00dev->bcn != queue ||
536             !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
537                 return;
538
539         for (i = 0; i < queue->limit; i++) {
540                 bcn_priv = queue->entries[i].priv_data;
541                 usb_kill_urb(bcn_priv->guardian_urb);
542                 usb_free_urb(bcn_priv->guardian_urb);
543         }
544 }
545
546 int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
547 {
548         struct data_queue *queue;
549         int status;
550
551         /*
552          * Find endpoints for each queue
553          */
554         status = rt2x00usb_find_endpoints(rt2x00dev);
555         if (status)
556                 goto exit;
557
558         /*
559          * Allocate DMA
560          */
561         queue_for_each(rt2x00dev, queue) {
562                 status = rt2x00usb_alloc_urb(rt2x00dev, queue);
563                 if (status)
564                         goto exit;
565         }
566
567         return 0;
568
569 exit:
570         rt2x00usb_uninitialize(rt2x00dev);
571
572         return status;
573 }
574 EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
575
576 void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
577 {
578         struct data_queue *queue;
579
580         queue_for_each(rt2x00dev, queue)
581                 rt2x00usb_free_urb(rt2x00dev, queue);
582 }
583 EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);
584
585 /*
586  * USB driver handlers.
587  */
588 static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev)
589 {
590         kfree(rt2x00dev->rf);
591         rt2x00dev->rf = NULL;
592
593         kfree(rt2x00dev->eeprom);
594         rt2x00dev->eeprom = NULL;
595
596         kfree(rt2x00dev->csr.cache);
597         rt2x00dev->csr.cache = NULL;
598 }
599
600 static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
601 {
602         rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL);
603         if (!rt2x00dev->csr.cache)
604                 goto exit;
605
606         rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
607         if (!rt2x00dev->eeprom)
608                 goto exit;
609
610         rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
611         if (!rt2x00dev->rf)
612                 goto exit;
613
614         return 0;
615
616 exit:
617         ERROR_PROBE("Failed to allocate registers.\n");
618
619         rt2x00usb_free_reg(rt2x00dev);
620
621         return -ENOMEM;
622 }
623
624 int rt2x00usb_probe(struct usb_interface *usb_intf,
625                     const struct usb_device_id *id)
626 {
627         struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
628         struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info;
629         struct ieee80211_hw *hw;
630         struct rt2x00_dev *rt2x00dev;
631         int retval;
632
633         usb_dev = usb_get_dev(usb_dev);
634
635         hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
636         if (!hw) {
637                 ERROR_PROBE("Failed to allocate hardware.\n");
638                 retval = -ENOMEM;
639                 goto exit_put_device;
640         }
641
642         usb_set_intfdata(usb_intf, hw);
643
644         rt2x00dev = hw->priv;
645         rt2x00dev->dev = &usb_intf->dev;
646         rt2x00dev->ops = ops;
647         rt2x00dev->hw = hw;
648
649         retval = rt2x00usb_alloc_reg(rt2x00dev);
650         if (retval)
651                 goto exit_free_device;
652
653         retval = rt2x00lib_probe_dev(rt2x00dev);
654         if (retval)
655                 goto exit_free_reg;
656
657         return 0;
658
659 exit_free_reg:
660         rt2x00usb_free_reg(rt2x00dev);
661
662 exit_free_device:
663         ieee80211_free_hw(hw);
664
665 exit_put_device:
666         usb_put_dev(usb_dev);
667
668         usb_set_intfdata(usb_intf, NULL);
669
670         return retval;
671 }
672 EXPORT_SYMBOL_GPL(rt2x00usb_probe);
673
674 void rt2x00usb_disconnect(struct usb_interface *usb_intf)
675 {
676         struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
677         struct rt2x00_dev *rt2x00dev = hw->priv;
678
679         /*
680          * Free all allocated data.
681          */
682         rt2x00lib_remove_dev(rt2x00dev);
683         rt2x00usb_free_reg(rt2x00dev);
684         ieee80211_free_hw(hw);
685
686         /*
687          * Free the USB device data.
688          */
689         usb_set_intfdata(usb_intf, NULL);
690         usb_put_dev(interface_to_usbdev(usb_intf));
691 }
692 EXPORT_SYMBOL_GPL(rt2x00usb_disconnect);
693
694 #ifdef CONFIG_PM
695 int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state)
696 {
697         struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
698         struct rt2x00_dev *rt2x00dev = hw->priv;
699         int retval;
700
701         retval = rt2x00lib_suspend(rt2x00dev, state);
702         if (retval)
703                 return retval;
704
705         /*
706          * Decrease usbdev refcount.
707          */
708         usb_put_dev(interface_to_usbdev(usb_intf));
709
710         return 0;
711 }
712 EXPORT_SYMBOL_GPL(rt2x00usb_suspend);
713
714 int rt2x00usb_resume(struct usb_interface *usb_intf)
715 {
716         struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
717         struct rt2x00_dev *rt2x00dev = hw->priv;
718
719         usb_get_dev(interface_to_usbdev(usb_intf));
720
721         return rt2x00lib_resume(rt2x00dev);
722 }
723 EXPORT_SYMBOL_GPL(rt2x00usb_resume);
724 #endif /* CONFIG_PM */
725
726 /*
727  * rt2x00usb module information.
728  */
729 MODULE_AUTHOR(DRV_PROJECT);
730 MODULE_VERSION(DRV_VERSION);
731 MODULE_DESCRIPTION("rt2x00 usb library");
732 MODULE_LICENSE("GPL");