blob: 83862e7f7aec1f03b4de6ea221f1d90491e30277 [file] [log] [blame]
Ivo van Doorn95ea3622007-09-25 17:57:13 -07001/*
Ivo van Doorn811aa9c2008-02-03 15:42:53 +01002 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
Ivo van Doorn95ea3622007-09-25 17:57:13 -07003 <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
Ivo van Doorn95ea3622007-09-25 17:57:13 -070026#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/usb.h>
Adam Baker3d823462007-10-27 13:43:29 +020029#include <linux/bug.h>
Ivo van Doorn95ea3622007-09-25 17:57:13 -070030
31#include "rt2x00.h"
32#include "rt2x00usb.h"
33
34/*
35 * Interfacing with the HW.
36 */
Adam Baker0e14f6d2007-10-27 13:41:25 +020037int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
Ivo van Doorn95ea3622007-09-25 17:57:13 -070038 const u8 request, const u8 requesttype,
39 const u16 offset, const u16 value,
40 void *buffer, const u16 buffer_length,
Ivo van Doorne9136552007-09-25 20:54:20 +020041 const int timeout)
Ivo van Doorn95ea3622007-09-25 17:57:13 -070042{
Ivo van Doornc1d35df2008-06-16 19:57:11 +020043 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
Ivo van Doorn95ea3622007-09-25 17:57:13 -070044 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
Adam Baker3d823462007-10-27 13:43:29 +020050
Ivo van Doorn95ea3622007-09-25 17:57:13 -070051 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 /*
Ivo van Doorne9136552007-09-25 20:54:20 +020059 * Check for errors
Ivo van Doorn95ea3622007-09-25 17:57:13 -070060 * -ENODEV: Device has disappeared, no point continuing.
Ivo van Doorne9136552007-09-25 20:54:20 +020061 * All other errors: Try again.
Ivo van Doorn95ea3622007-09-25 17:57:13 -070062 */
Ivo van Doorn95ea3622007-09-25 17:57:13 -070063 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}
73EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
74
Adam Baker3d823462007-10-27 13:43:29 +020075int 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)
Ivo van Doorn95ea3622007-09-25 17:57:13 -070079{
80 int status;
81
Adam Baker3d823462007-10-27 13:43:29 +020082 BUG_ON(!mutex_is_locked(&rt2x00dev->usb_cache_mutex));
83
Ivo van Doorn95ea3622007-09-25 17:57:13 -070084 /*
85 * Check for Cache availability.
86 */
Ivo van Doorn21795092008-02-10 22:49:13 +010087 if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) {
Ivo van Doorn95ea3622007-09-25 17:57:13 -070088 ERROR(rt2x00dev, "CSR cache not available.\n");
89 return -ENOMEM;
90 }
91
92 if (requesttype == USB_VENDOR_REQUEST_OUT)
Ivo van Doorn21795092008-02-10 22:49:13 +010093 memcpy(rt2x00dev->csr.cache, buffer, buffer_length);
Ivo van Doorn95ea3622007-09-25 17:57:13 -070094
95 status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype,
Ivo van Doorn21795092008-02-10 22:49:13 +010096 offset, 0, rt2x00dev->csr.cache,
Ivo van Doorn95ea3622007-09-25 17:57:13 -070097 buffer_length, timeout);
98
99 if (!status && requesttype == USB_VENDOR_REQUEST_IN)
Ivo van Doorn21795092008-02-10 22:49:13 +0100100 memcpy(buffer, rt2x00dev->csr.cache, buffer_length);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700101
102 return status;
103}
Adam Baker3d823462007-10-27 13:43:29 +0200104EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock);
105
106int 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->usb_cache_mutex);
114
115 status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
116 requesttype, offset, buffer,
117 buffer_length, timeout);
118
119 mutex_unlock(&rt2x00dev->usb_cache_mutex);
120
121 return status;
122}
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700123EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff);
124
125/*
126 * TX data handlers.
127 */
128static void rt2x00usb_interrupt_txdone(struct urb *urb)
129{
Ivo van Doorn181d6902008-02-05 16:42:23 -0500130 struct queue_entry *entry = (struct queue_entry *)urb->context;
131 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
Ivo van Doorn181d6902008-02-05 16:42:23 -0500132 struct txdone_entry_desc txdesc;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700133
134 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
Ivo van Doornd74f5ba2008-06-16 19:56:54 +0200135 !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700136 return;
137
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700138 /*
139 * Remove the descriptor data from the buffer.
140 */
Ivo van Doorn181d6902008-02-05 16:42:23 -0500141 skb_pull(entry->skb, entry->queue->desc_size);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700142
143 /*
144 * Obtain the status about this packet.
Ivo van Doornfb55f4d2008-05-10 13:42:06 +0200145 * Note that when the status is 0 it does not mean the
146 * frame was send out correctly. It only means the frame
147 * was succesfully pushed to the hardware, we have no
148 * way to determine the transmission status right now.
149 * (Only indirectly by looking at the failed TX counters
150 * in the register).
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700151 */
Ivo van Doornfb55f4d2008-05-10 13:42:06 +0200152 if (!urb->status)
153 __set_bit(TXDONE_UNKNOWN, &txdesc.flags);
154 else
155 __set_bit(TXDONE_FAILURE, &txdesc.flags);
Ivo van Doorn181d6902008-02-05 16:42:23 -0500156 txdesc.retry = 0;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700157
Ivo van Doorn181d6902008-02-05 16:42:23 -0500158 rt2x00lib_txdone(entry, &txdesc);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700159}
160
Ivo van Doorn6db37862008-06-06 22:50:28 +0200161int rt2x00usb_write_tx_data(struct queue_entry *entry)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700162{
Ivo van Doorn6db37862008-06-06 22:50:28 +0200163 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
Ivo van Doornc1d35df2008-06-16 19:57:11 +0200164 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200165 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
Ivo van Doorn181d6902008-02-05 16:42:23 -0500166 struct skb_frame_desc *skbdesc;
Ivo van Doorndd9fa2d2007-10-06 14:15:46 +0200167 u32 length;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700168
Ivo van Doorn7050ec82008-05-10 13:46:13 +0200169 /*
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700170 * Add the descriptor in front of the skb.
171 */
Ivo van Doorn6db37862008-06-06 22:50:28 +0200172 skb_push(entry->skb, entry->queue->desc_size);
173 memset(entry->skb->data, 0, entry->queue->desc_size);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700174
Ivo van Doorn08992f72008-01-24 01:56:25 -0800175 /*
176 * Fill in skb descriptor
177 */
Ivo van Doorn6db37862008-06-06 22:50:28 +0200178 skbdesc = get_skb_frame_desc(entry->skb);
Ivo van Doorn6db37862008-06-06 22:50:28 +0200179 skbdesc->desc = entry->skb->data;
180 skbdesc->desc_len = entry->queue->desc_size;
Ivo van Doorn08992f72008-01-24 01:56:25 -0800181
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700182 /*
Ivo van Doorndd9fa2d2007-10-06 14:15:46 +0200183 * USB devices cannot blindly pass the skb->len as the
184 * length of the data to usb_fill_bulk_urb. Pass the skb
185 * to the driver to determine what the length should be.
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700186 */
Ivo van Doorn6db37862008-06-06 22:50:28 +0200187 length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, entry->skb);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700188
Ivo van Doorn6db37862008-06-06 22:50:28 +0200189 usb_fill_bulk_urb(entry_priv->urb, usb_dev,
190 usb_sndbulkpipe(usb_dev, 1),
191 entry->skb->data, length,
192 rt2x00usb_interrupt_txdone, entry);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700193
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700194 return 0;
195}
196EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data);
197
Ivo van Doornf019d512008-06-06 22:47:39 +0200198static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
199{
200 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
201
202 if (__test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags))
203 usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
204}
205
206void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
207 const enum data_queue_qid qid)
208{
209 struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid);
210 unsigned long irqflags;
211 unsigned int index;
212 unsigned int index_done;
213 unsigned int i;
214
215 /*
216 * Only protect the range we are going to loop over,
217 * if during our loop a extra entry is set to pending
218 * it should not be kicked during this run, since it
219 * is part of another TX operation.
220 */
221 spin_lock_irqsave(&queue->lock, irqflags);
222 index = queue->index[Q_INDEX];
223 index_done = queue->index[Q_INDEX_DONE];
224 spin_unlock_irqrestore(&queue->lock, irqflags);
225
226 /*
227 * Start from the TX done pointer, this guarentees that we will
228 * send out all frames in the correct order.
229 */
230 if (index_done < index) {
231 for (i = index_done; i < index; i++)
232 rt2x00usb_kick_tx_entry(&queue->entries[i]);
233 } else {
234 for (i = index_done; i < queue->limit; i++)
235 rt2x00usb_kick_tx_entry(&queue->entries[i]);
236
237 for (i = 0; i < index; i++)
238 rt2x00usb_kick_tx_entry(&queue->entries[i]);
239 }
240}
241EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue);
242
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700243/*
244 * RX data handlers.
245 */
Ivo van Doorn181d6902008-02-05 16:42:23 -0500246static void rt2x00usb_interrupt_rxdone(struct urb *urb)
247{
248 struct queue_entry *entry = (struct queue_entry *)urb->context;
249 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
Gertjan van Wingerdec4da0042008-06-16 19:56:31 +0200250 struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
Gertjan van Wingerdea26cbc62008-06-06 22:54:28 +0200251 u8 rxd[32];
Ivo van Doorn181d6902008-02-05 16:42:23 -0500252
253 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
Ivo van Doornd74f5ba2008-06-16 19:56:54 +0200254 !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
Ivo van Doorn181d6902008-02-05 16:42:23 -0500255 return;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700256
257 /*
Ivo van Doorn181d6902008-02-05 16:42:23 -0500258 * Check if the received data is simply too small
259 * to be actually valid, or if the urb is signaling
260 * a problem.
Ivo van Doorn08992f72008-01-24 01:56:25 -0800261 */
Ivo van Doornd74f5ba2008-06-16 19:56:54 +0200262 if (urb->actual_length < entry->queue->desc_size || urb->status) {
263 __set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
264 usb_submit_urb(urb, GFP_ATOMIC);
265 return;
266 }
Ivo van Doorn181d6902008-02-05 16:42:23 -0500267
268 /*
Gertjan van Wingerdec4da0042008-06-16 19:56:31 +0200269 * Fill in desc fields of the skb descriptor
Ivo van Doorn181d6902008-02-05 16:42:23 -0500270 */
Gertjan van Wingerdea26cbc62008-06-06 22:54:28 +0200271 skbdesc->desc = rxd;
272 skbdesc->desc_len = entry->queue->desc_size;
Ivo van Doorn181d6902008-02-05 16:42:23 -0500273
Ivo van Doorn08992f72008-01-24 01:56:25 -0800274 /*
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700275 * Send the frame to rt2x00lib for further processing.
276 */
Gertjan van Wingerdec4da0042008-06-16 19:56:31 +0200277 rt2x00lib_rxdone(rt2x00dev, entry);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700278}
279
280/*
281 * Radio handlers
282 */
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700283void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
284{
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200285 struct queue_entry_priv_usb *entry_priv;
286 struct queue_entry_priv_usb_bcn *bcn_priv;
Ivo van Doorn40af48c2008-06-23 19:56:50 +0200287 struct data_queue *queue;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700288 unsigned int i;
289
Ivo van Doornbd394a72008-04-21 19:01:58 +0200290 rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0,
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700291 REGISTER_TIMEOUT);
292
293 /*
Ivo van Doorn181d6902008-02-05 16:42:23 -0500294 * Cancel all queues.
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700295 */
Ivo van Doorn40af48c2008-06-23 19:56:50 +0200296 queue_for_each(rt2x00dev, queue) {
297 for (i = 0; i < queue->limit; i++) {
298 entry_priv = queue->entries[i].priv_data;
299 usb_kill_urb(entry_priv->urb);
300 }
Ivo van Doorn181d6902008-02-05 16:42:23 -0500301 }
302
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200303 /*
Ivo van Doornedfa78b2008-06-03 20:29:50 +0200304 * Kill guardian urb (if required by driver).
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200305 */
Ivo van Doornedfa78b2008-06-03 20:29:50 +0200306 if (!test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
307 return;
308
Ivo van Doorn330e3f92008-02-10 22:52:36 +0100309 for (i = 0; i < rt2x00dev->bcn->limit; i++) {
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200310 bcn_priv = rt2x00dev->bcn->entries[i].priv_data;
311 if (bcn_priv->guardian_urb)
312 usb_kill_urb(bcn_priv->guardian_urb);
Ivo van Doorn330e3f92008-02-10 22:52:36 +0100313 }
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700314}
315EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
316
317/*
318 * Device initialization handlers.
319 */
Ivo van Doorn837e7f22008-01-06 23:41:45 +0100320void rt2x00usb_init_rxentry(struct rt2x00_dev *rt2x00dev,
Ivo van Doorn181d6902008-02-05 16:42:23 -0500321 struct queue_entry *entry)
Ivo van Doorn837e7f22008-01-06 23:41:45 +0100322{
Ivo van Doornc1d35df2008-06-16 19:57:11 +0200323 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200324 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
Ivo van Doorn837e7f22008-01-06 23:41:45 +0100325
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200326 usb_fill_bulk_urb(entry_priv->urb, usb_dev,
Ivo van Doorn837e7f22008-01-06 23:41:45 +0100327 usb_rcvbulkpipe(usb_dev, 1),
328 entry->skb->data, entry->skb->len,
329 rt2x00usb_interrupt_rxdone, entry);
330
Ivo van Doorn181d6902008-02-05 16:42:23 -0500331 __set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200332 usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
Ivo van Doorn837e7f22008-01-06 23:41:45 +0100333}
334EXPORT_SYMBOL_GPL(rt2x00usb_init_rxentry);
335
336void rt2x00usb_init_txentry(struct rt2x00_dev *rt2x00dev,
Ivo van Doorn181d6902008-02-05 16:42:23 -0500337 struct queue_entry *entry)
Ivo van Doorn837e7f22008-01-06 23:41:45 +0100338{
339 entry->flags = 0;
340}
341EXPORT_SYMBOL_GPL(rt2x00usb_init_txentry);
342
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700343static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
Ivo van Doorn181d6902008-02-05 16:42:23 -0500344 struct data_queue *queue)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700345{
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200346 struct queue_entry_priv_usb *entry_priv;
347 struct queue_entry_priv_usb_bcn *bcn_priv;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700348 unsigned int i;
349
Ivo van Doorn181d6902008-02-05 16:42:23 -0500350 for (i = 0; i < queue->limit; i++) {
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200351 entry_priv = queue->entries[i].priv_data;
352 entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL);
353 if (!entry_priv->urb)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700354 return -ENOMEM;
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200355 }
Ivo van Doorn181d6902008-02-05 16:42:23 -0500356
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200357 /*
358 * If this is not the beacon queue or
359 * no guardian byte was required for the beacon,
360 * then we are done.
361 */
362 if (rt2x00dev->bcn != queue ||
363 !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
364 return 0;
Ivo van Doorn181d6902008-02-05 16:42:23 -0500365
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200366 for (i = 0; i < queue->limit; i++) {
367 bcn_priv = queue->entries[i].priv_data;
368 bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL);
369 if (!bcn_priv->guardian_urb)
370 return -ENOMEM;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700371 }
372
373 return 0;
374}
375
376static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev,
Ivo van Doorn181d6902008-02-05 16:42:23 -0500377 struct data_queue *queue)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700378{
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200379 struct queue_entry_priv_usb *entry_priv;
380 struct queue_entry_priv_usb_bcn *bcn_priv;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700381 unsigned int i;
382
Ivo van Doorn181d6902008-02-05 16:42:23 -0500383 if (!queue->entries)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700384 return;
385
Ivo van Doorn181d6902008-02-05 16:42:23 -0500386 for (i = 0; i < queue->limit; i++) {
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200387 entry_priv = queue->entries[i].priv_data;
388 usb_kill_urb(entry_priv->urb);
389 usb_free_urb(entry_priv->urb);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700390 }
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200391
392 /*
393 * If this is not the beacon queue or
394 * no guardian byte was required for the beacon,
395 * then we are done.
396 */
397 if (rt2x00dev->bcn != queue ||
398 !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
399 return;
400
401 for (i = 0; i < queue->limit; i++) {
402 bcn_priv = queue->entries[i].priv_data;
403 usb_kill_urb(bcn_priv->guardian_urb);
404 usb_free_urb(bcn_priv->guardian_urb);
405 }
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700406}
407
408int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
409{
Ivo van Doorn181d6902008-02-05 16:42:23 -0500410 struct data_queue *queue;
Gertjan van Wingerde30caa6e2008-06-16 19:56:08 +0200411 int status;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700412
413 /*
414 * Allocate DMA
415 */
Ivo van Doorn181d6902008-02-05 16:42:23 -0500416 queue_for_each(rt2x00dev, queue) {
417 status = rt2x00usb_alloc_urb(rt2x00dev, queue);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700418 if (status)
419 goto exit;
420 }
421
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700422 return 0;
423
424exit:
425 rt2x00usb_uninitialize(rt2x00dev);
426
427 return status;
428}
429EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
430
431void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
432{
Ivo van Doorn181d6902008-02-05 16:42:23 -0500433 struct data_queue *queue;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700434
Ivo van Doorn181d6902008-02-05 16:42:23 -0500435 queue_for_each(rt2x00dev, queue)
436 rt2x00usb_free_urb(rt2x00dev, queue);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700437}
438EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);
439
440/*
441 * USB driver handlers.
442 */
443static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev)
444{
445 kfree(rt2x00dev->rf);
446 rt2x00dev->rf = NULL;
447
448 kfree(rt2x00dev->eeprom);
449 rt2x00dev->eeprom = NULL;
450
Ivo van Doorn21795092008-02-10 22:49:13 +0100451 kfree(rt2x00dev->csr.cache);
452 rt2x00dev->csr.cache = NULL;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700453}
454
455static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
456{
Ivo van Doorn21795092008-02-10 22:49:13 +0100457 rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL);
458 if (!rt2x00dev->csr.cache)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700459 goto exit;
460
461 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
462 if (!rt2x00dev->eeprom)
463 goto exit;
464
465 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
466 if (!rt2x00dev->rf)
467 goto exit;
468
469 return 0;
470
471exit:
472 ERROR_PROBE("Failed to allocate registers.\n");
473
474 rt2x00usb_free_reg(rt2x00dev);
475
476 return -ENOMEM;
477}
478
479int rt2x00usb_probe(struct usb_interface *usb_intf,
480 const struct usb_device_id *id)
481{
482 struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
483 struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info;
484 struct ieee80211_hw *hw;
485 struct rt2x00_dev *rt2x00dev;
486 int retval;
487
488 usb_dev = usb_get_dev(usb_dev);
489
490 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
491 if (!hw) {
492 ERROR_PROBE("Failed to allocate hardware.\n");
493 retval = -ENOMEM;
494 goto exit_put_device;
495 }
496
497 usb_set_intfdata(usb_intf, hw);
498
499 rt2x00dev = hw->priv;
Gertjan van Wingerde14a3bf82008-06-16 19:55:43 +0200500 rt2x00dev->dev = &usb_intf->dev;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700501 rt2x00dev->ops = ops;
502 rt2x00dev->hw = hw;
Adam Baker3d823462007-10-27 13:43:29 +0200503 mutex_init(&rt2x00dev->usb_cache_mutex);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700504
Ivo van Doornb242e892007-11-15 23:41:31 +0100505 rt2x00dev->usb_maxpacket =
506 usb_maxpacket(usb_dev, usb_sndbulkpipe(usb_dev, 1), 1);
507 if (!rt2x00dev->usb_maxpacket)
508 rt2x00dev->usb_maxpacket = 1;
509
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700510 retval = rt2x00usb_alloc_reg(rt2x00dev);
511 if (retval)
512 goto exit_free_device;
513
514 retval = rt2x00lib_probe_dev(rt2x00dev);
515 if (retval)
516 goto exit_free_reg;
517
518 return 0;
519
520exit_free_reg:
521 rt2x00usb_free_reg(rt2x00dev);
522
523exit_free_device:
524 ieee80211_free_hw(hw);
525
526exit_put_device:
527 usb_put_dev(usb_dev);
528
529 usb_set_intfdata(usb_intf, NULL);
530
531 return retval;
532}
533EXPORT_SYMBOL_GPL(rt2x00usb_probe);
534
535void rt2x00usb_disconnect(struct usb_interface *usb_intf)
536{
537 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
538 struct rt2x00_dev *rt2x00dev = hw->priv;
539
540 /*
541 * Free all allocated data.
542 */
543 rt2x00lib_remove_dev(rt2x00dev);
544 rt2x00usb_free_reg(rt2x00dev);
545 ieee80211_free_hw(hw);
546
547 /*
548 * Free the USB device data.
549 */
550 usb_set_intfdata(usb_intf, NULL);
551 usb_put_dev(interface_to_usbdev(usb_intf));
552}
553EXPORT_SYMBOL_GPL(rt2x00usb_disconnect);
554
555#ifdef CONFIG_PM
556int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state)
557{
558 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
559 struct rt2x00_dev *rt2x00dev = hw->priv;
560 int retval;
561
562 retval = rt2x00lib_suspend(rt2x00dev, state);
563 if (retval)
564 return retval;
565
566 rt2x00usb_free_reg(rt2x00dev);
567
568 /*
569 * Decrease usbdev refcount.
570 */
571 usb_put_dev(interface_to_usbdev(usb_intf));
572
573 return 0;
574}
575EXPORT_SYMBOL_GPL(rt2x00usb_suspend);
576
577int rt2x00usb_resume(struct usb_interface *usb_intf)
578{
579 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
580 struct rt2x00_dev *rt2x00dev = hw->priv;
581 int retval;
582
583 usb_get_dev(interface_to_usbdev(usb_intf));
584
585 retval = rt2x00usb_alloc_reg(rt2x00dev);
586 if (retval)
587 return retval;
588
589 retval = rt2x00lib_resume(rt2x00dev);
590 if (retval)
591 goto exit_free_reg;
592
593 return 0;
594
595exit_free_reg:
596 rt2x00usb_free_reg(rt2x00dev);
597
598 return retval;
599}
600EXPORT_SYMBOL_GPL(rt2x00usb_resume);
601#endif /* CONFIG_PM */
602
603/*
Ivo van Doorn181d6902008-02-05 16:42:23 -0500604 * rt2x00usb module information.
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700605 */
606MODULE_AUTHOR(DRV_PROJECT);
607MODULE_VERSION(DRV_VERSION);
Ivo van Doorn181d6902008-02-05 16:42:23 -0500608MODULE_DESCRIPTION("rt2x00 usb library");
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700609MODULE_LICENSE("GPL");