USB: serial: safe_serial: fix information leak in completion handler
[pandora-kernel.git] / drivers / bluetooth / btusb.c
1 /*
2  *
3  *  Generic Bluetooth USB driver
4  *
5  *  Copyright (C) 2005-2008  Marcel Holtmann <marcel@holtmann.org>
6  *
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21  *
22  */
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/types.h>
29 #include <linux/sched.h>
30 #include <linux/errno.h>
31 #include <linux/skbuff.h>
32
33 #include <linux/usb.h>
34
35 #include <net/bluetooth/bluetooth.h>
36 #include <net/bluetooth/hci_core.h>
37
38 #define VERSION "0.6"
39
40 static int ignore_dga;
41 static int ignore_csr;
42 static int ignore_sniffer;
43 static int disable_scofix;
44 static int force_scofix;
45
46 static int reset = 1;
47
48 static struct usb_driver btusb_driver;
49
50 #define BTUSB_IGNORE            0x01
51 #define BTUSB_DIGIANSWER        0x02
52 #define BTUSB_CSR               0x04
53 #define BTUSB_SNIFFER           0x08
54 #define BTUSB_BCM92035          0x10
55 #define BTUSB_BROKEN_ISOC       0x20
56 #define BTUSB_WRONG_SCO_MTU     0x40
57 #define BTUSB_ATH3012           0x80
58 #define BTUSB_INTEL_BOOT        0x200
59
60 static struct usb_device_id btusb_table[] = {
61         /* Generic Bluetooth USB device */
62         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
63
64         /* Apple-specific (Broadcom) devices */
65         { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01) },
66
67         /* MediaTek MT76x0E */
68         { USB_DEVICE(0x0e8d, 0x763f) },
69
70         /* Broadcom SoftSailing reporting vendor specific */
71         { USB_DEVICE(0x0a5c, 0x21e1) },
72
73         /* Apple MacBookPro 7,1 */
74         { USB_DEVICE(0x05ac, 0x8213) },
75
76         /* Apple iMac11,1 */
77         { USB_DEVICE(0x05ac, 0x8215) },
78
79         /* Apple MacBookPro6,2 */
80         { USB_DEVICE(0x05ac, 0x8218) },
81
82         /* Apple MacBookAir3,1, MacBookAir3,2 */
83         { USB_DEVICE(0x05ac, 0x821b) },
84
85         /* Apple MacBookAir4,1 */
86         { USB_DEVICE(0x05ac, 0x821f) },
87
88         /* Apple MacBookPro8,2 */
89         { USB_DEVICE(0x05ac, 0x821a) },
90
91         /* Apple MacMini5,1 */
92         { USB_DEVICE(0x05ac, 0x8281) },
93
94         /* AVM BlueFRITZ! USB v2.0 */
95         { USB_DEVICE(0x057c, 0x3800) },
96
97         /* Bluetooth Ultraport Module from IBM */
98         { USB_DEVICE(0x04bf, 0x030a) },
99
100         /* ALPS Modules with non-standard id */
101         { USB_DEVICE(0x044e, 0x3001) },
102         { USB_DEVICE(0x044e, 0x3002) },
103
104         /* Ericsson with non-standard id */
105         { USB_DEVICE(0x0bdb, 0x1002) },
106
107         /* Canyon CN-BTU1 with HID interfaces */
108         { USB_DEVICE(0x0c10, 0x0000) },
109
110         /* Broadcom BCM20702A0 */
111         { USB_DEVICE(0x0489, 0xe042) },
112         { USB_DEVICE(0x04ca, 0x2003) },
113         { USB_DEVICE(0x0b05, 0x17b5) },
114         { USB_DEVICE(0x0b05, 0x17cb) },
115         { USB_DEVICE(0x413c, 0x8197) },
116
117         /* Foxconn - Hon Hai */
118         { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01) },
119
120         /* Broadcom devices with vendor specific id */
121         { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01) },
122
123         /* ASUSTek Computer - Broadcom based */
124         { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01) },
125
126         /* Belkin F8065bf - Broadcom based */
127         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01) },
128
129         /* IMC Networks - Broadcom based */
130         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01) },
131
132         /* Intel Bluetooth USB Bootloader (RAM module) */
133         { USB_DEVICE(0x8087, 0x0a5a),
134           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
135
136         { }     /* Terminating entry */
137 };
138
139 MODULE_DEVICE_TABLE(usb, btusb_table);
140
141 static struct usb_device_id blacklist_table[] = {
142         /* CSR BlueCore devices */
143         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
144
145         /* Broadcom BCM2033 without firmware */
146         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
147
148         /* Atheros 3011 with sflash firmware */
149         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
150         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
151         { USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
152         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
153         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
154         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
155         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
156
157         /* Atheros AR9285 Malbec with sflash firmware */
158         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
159
160         /* Atheros 3012 with sflash firmware */
161         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
162         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
163         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
164         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
165         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
166         { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
167         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
168         { USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
169         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
170         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
171         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
172         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
173         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
174         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
175         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
176         { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
177         { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
178         { USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
179         { USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
180         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
181         { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
182         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
183         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
184         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
185         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
186         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
187         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
188         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
189         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
190         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
191         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
192         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
193         { USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
194         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
195         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
196         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
197         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
198         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
199         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
200         { USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
201         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
202         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
203         { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
204         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
205         { USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
206         { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
207         { USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
208         { USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
209
210         /* Atheros AR5BBU12 with sflash firmware */
211         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
212
213         /* Atheros AR5BBU12 with sflash firmware */
214         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
215         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
216
217         /* Broadcom BCM2035 */
218         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
219         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
220         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
221
222         /* Broadcom BCM2045 */
223         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
224         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
225
226         /* IBM/Lenovo ThinkPad with Broadcom chip */
227         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
228         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
229
230         /* HP laptop with Broadcom chip */
231         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
232
233         /* Dell laptop with Broadcom chip */
234         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
235
236         /* Dell Wireless 370 and 410 devices */
237         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
238         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
239
240         /* Belkin F8T012 and F8T013 devices */
241         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
242         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
243
244         /* Asus WL-BTD202 device */
245         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
246
247         /* Kensington Bluetooth USB adapter */
248         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
249
250         /* RTX Telecom based adapters with buggy SCO support */
251         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
252         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
253
254         /* CONWISE Technology based adapters with buggy SCO support */
255         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
256
257         /* Digianswer devices */
258         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
259         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
260
261         /* CSR BlueCore Bluetooth Sniffer */
262         { USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
263
264         /* Frontline ComProbe Bluetooth Sniffer */
265         { USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },
266
267         { }     /* Terminating entry */
268 };
269
270 #define BTUSB_MAX_ISOC_FRAMES   10
271
272 #define BTUSB_INTR_RUNNING      0
273 #define BTUSB_BULK_RUNNING      1
274 #define BTUSB_ISOC_RUNNING      2
275 #define BTUSB_SUSPENDING        3
276 #define BTUSB_DID_ISO_RESUME    4
277
278 struct btusb_data {
279         struct hci_dev       *hdev;
280         struct usb_device    *udev;
281         struct usb_interface *intf;
282         struct usb_interface *isoc;
283
284         spinlock_t lock;
285
286         unsigned long flags;
287
288         struct work_struct work;
289         struct work_struct waker;
290
291         struct usb_anchor tx_anchor;
292         struct usb_anchor intr_anchor;
293         struct usb_anchor bulk_anchor;
294         struct usb_anchor isoc_anchor;
295         struct usb_anchor deferred;
296         int tx_in_flight;
297         spinlock_t txlock;
298
299         struct usb_endpoint_descriptor *intr_ep;
300         struct usb_endpoint_descriptor *bulk_tx_ep;
301         struct usb_endpoint_descriptor *bulk_rx_ep;
302         struct usb_endpoint_descriptor *isoc_tx_ep;
303         struct usb_endpoint_descriptor *isoc_rx_ep;
304
305         __u8 cmdreq_type;
306
307         unsigned int sco_num;
308         int isoc_altsetting;
309         int suspend_count;
310 };
311
312 static int inc_tx(struct btusb_data *data)
313 {
314         unsigned long flags;
315         int rv;
316
317         spin_lock_irqsave(&data->txlock, flags);
318         rv = test_bit(BTUSB_SUSPENDING, &data->flags);
319         if (!rv)
320                 data->tx_in_flight++;
321         spin_unlock_irqrestore(&data->txlock, flags);
322
323         return rv;
324 }
325
326 static void btusb_intr_complete(struct urb *urb)
327 {
328         struct hci_dev *hdev = urb->context;
329         struct btusb_data *data = hdev->driver_data;
330         int err;
331
332         BT_DBG("%s urb %p status %d count %d", hdev->name,
333                                         urb, urb->status, urb->actual_length);
334
335         if (!test_bit(HCI_RUNNING, &hdev->flags))
336                 return;
337
338         if (urb->status == 0) {
339                 hdev->stat.byte_rx += urb->actual_length;
340
341                 if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
342                                                 urb->transfer_buffer,
343                                                 urb->actual_length) < 0) {
344                         BT_ERR("%s corrupted event packet", hdev->name);
345                         hdev->stat.err_rx++;
346                 }
347         } else if (urb->status == -ENOENT) {
348                 /* Avoid suspend failed when usb_kill_urb */
349                 return;
350         }
351
352         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
353                 return;
354
355         usb_mark_last_busy(data->udev);
356         usb_anchor_urb(urb, &data->intr_anchor);
357
358         err = usb_submit_urb(urb, GFP_ATOMIC);
359         if (err < 0) {
360                 /* -EPERM: urb is being killed;
361                  * -ENODEV: device got disconnected */
362                 if (err != -EPERM && err != -ENODEV)
363                         BT_ERR("%s urb %p failed to resubmit (%d)",
364                                                 hdev->name, urb, -err);
365                 usb_unanchor_urb(urb);
366         }
367 }
368
369 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
370 {
371         struct btusb_data *data = hdev->driver_data;
372         struct urb *urb;
373         unsigned char *buf;
374         unsigned int pipe;
375         int err, size;
376
377         BT_DBG("%s", hdev->name);
378
379         if (!data->intr_ep)
380                 return -ENODEV;
381
382         urb = usb_alloc_urb(0, mem_flags);
383         if (!urb)
384                 return -ENOMEM;
385
386         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
387
388         buf = kmalloc(size, mem_flags);
389         if (!buf) {
390                 usb_free_urb(urb);
391                 return -ENOMEM;
392         }
393
394         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
395
396         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
397                                                 btusb_intr_complete, hdev,
398                                                 data->intr_ep->bInterval);
399
400         urb->transfer_flags |= URB_FREE_BUFFER;
401
402         usb_anchor_urb(urb, &data->intr_anchor);
403
404         err = usb_submit_urb(urb, mem_flags);
405         if (err < 0) {
406                 BT_ERR("%s urb %p submission failed (%d)",
407                                                 hdev->name, urb, -err);
408                 usb_unanchor_urb(urb);
409         }
410
411         usb_free_urb(urb);
412
413         return err;
414 }
415
416 static void btusb_bulk_complete(struct urb *urb)
417 {
418         struct hci_dev *hdev = urb->context;
419         struct btusb_data *data = hdev->driver_data;
420         int err;
421
422         BT_DBG("%s urb %p status %d count %d", hdev->name,
423                                         urb, urb->status, urb->actual_length);
424
425         if (!test_bit(HCI_RUNNING, &hdev->flags))
426                 return;
427
428         if (urb->status == 0) {
429                 hdev->stat.byte_rx += urb->actual_length;
430
431                 if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
432                                                 urb->transfer_buffer,
433                                                 urb->actual_length) < 0) {
434                         BT_ERR("%s corrupted ACL packet", hdev->name);
435                         hdev->stat.err_rx++;
436                 }
437         } else if (urb->status == -ENOENT) {
438                 /* Avoid suspend failed when usb_kill_urb */
439                 return;
440         }
441
442         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
443                 return;
444
445         usb_anchor_urb(urb, &data->bulk_anchor);
446         usb_mark_last_busy(data->udev);
447
448         err = usb_submit_urb(urb, GFP_ATOMIC);
449         if (err < 0) {
450                 /* -EPERM: urb is being killed;
451                  * -ENODEV: device got disconnected */
452                 if (err != -EPERM && err != -ENODEV)
453                         BT_ERR("%s urb %p failed to resubmit (%d)",
454                                                 hdev->name, urb, -err);
455                 usb_unanchor_urb(urb);
456         }
457 }
458
459 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
460 {
461         struct btusb_data *data = hdev->driver_data;
462         struct urb *urb;
463         unsigned char *buf;
464         unsigned int pipe;
465         int err, size = HCI_MAX_FRAME_SIZE;
466
467         BT_DBG("%s", hdev->name);
468
469         if (!data->bulk_rx_ep)
470                 return -ENODEV;
471
472         urb = usb_alloc_urb(0, mem_flags);
473         if (!urb)
474                 return -ENOMEM;
475
476         buf = kmalloc(size, mem_flags);
477         if (!buf) {
478                 usb_free_urb(urb);
479                 return -ENOMEM;
480         }
481
482         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
483
484         usb_fill_bulk_urb(urb, data->udev, pipe,
485                                         buf, size, btusb_bulk_complete, hdev);
486
487         urb->transfer_flags |= URB_FREE_BUFFER;
488
489         usb_mark_last_busy(data->udev);
490         usb_anchor_urb(urb, &data->bulk_anchor);
491
492         err = usb_submit_urb(urb, mem_flags);
493         if (err < 0) {
494                 BT_ERR("%s urb %p submission failed (%d)",
495                                                 hdev->name, urb, -err);
496                 usb_unanchor_urb(urb);
497         }
498
499         usb_free_urb(urb);
500
501         return err;
502 }
503
504 static void btusb_isoc_complete(struct urb *urb)
505 {
506         struct hci_dev *hdev = urb->context;
507         struct btusb_data *data = hdev->driver_data;
508         int i, err;
509
510         BT_DBG("%s urb %p status %d count %d", hdev->name,
511                                         urb, urb->status, urb->actual_length);
512
513         if (!test_bit(HCI_RUNNING, &hdev->flags))
514                 return;
515
516         if (urb->status == 0) {
517                 for (i = 0; i < urb->number_of_packets; i++) {
518                         unsigned int offset = urb->iso_frame_desc[i].offset;
519                         unsigned int length = urb->iso_frame_desc[i].actual_length;
520
521                         if (urb->iso_frame_desc[i].status)
522                                 continue;
523
524                         hdev->stat.byte_rx += length;
525
526                         if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
527                                                 urb->transfer_buffer + offset,
528                                                                 length) < 0) {
529                                 BT_ERR("%s corrupted SCO packet", hdev->name);
530                                 hdev->stat.err_rx++;
531                         }
532                 }
533         } else if (urb->status == -ENOENT) {
534                 /* Avoid suspend failed when usb_kill_urb */
535                 return;
536         }
537
538         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
539                 return;
540
541         usb_anchor_urb(urb, &data->isoc_anchor);
542
543         err = usb_submit_urb(urb, GFP_ATOMIC);
544         if (err < 0) {
545                 /* -EPERM: urb is being killed;
546                  * -ENODEV: device got disconnected */
547                 if (err != -EPERM && err != -ENODEV)
548                         BT_ERR("%s urb %p failed to resubmit (%d)",
549                                                 hdev->name, urb, -err);
550                 usb_unanchor_urb(urb);
551         }
552 }
553
554 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
555 {
556         int i, offset = 0;
557
558         BT_DBG("len %d mtu %d", len, mtu);
559
560         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
561                                         i++, offset += mtu, len -= mtu) {
562                 urb->iso_frame_desc[i].offset = offset;
563                 urb->iso_frame_desc[i].length = mtu;
564         }
565
566         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
567                 urb->iso_frame_desc[i].offset = offset;
568                 urb->iso_frame_desc[i].length = len;
569                 i++;
570         }
571
572         urb->number_of_packets = i;
573 }
574
575 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
576 {
577         struct btusb_data *data = hdev->driver_data;
578         struct urb *urb;
579         unsigned char *buf;
580         unsigned int pipe;
581         int err, size;
582
583         BT_DBG("%s", hdev->name);
584
585         if (!data->isoc_rx_ep)
586                 return -ENODEV;
587
588         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
589         if (!urb)
590                 return -ENOMEM;
591
592         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
593                                                 BTUSB_MAX_ISOC_FRAMES;
594
595         buf = kmalloc(size, mem_flags);
596         if (!buf) {
597                 usb_free_urb(urb);
598                 return -ENOMEM;
599         }
600
601         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
602
603         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
604                                 hdev, data->isoc_rx_ep->bInterval);
605
606         urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
607
608         __fill_isoc_descriptor(urb, size,
609                         le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
610
611         usb_anchor_urb(urb, &data->isoc_anchor);
612
613         err = usb_submit_urb(urb, mem_flags);
614         if (err < 0) {
615                 BT_ERR("%s urb %p submission failed (%d)",
616                                                 hdev->name, urb, -err);
617                 usb_unanchor_urb(urb);
618         }
619
620         usb_free_urb(urb);
621
622         return err;
623 }
624
625 static void btusb_tx_complete(struct urb *urb)
626 {
627         struct sk_buff *skb = urb->context;
628         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
629         struct btusb_data *data = hdev->driver_data;
630
631         BT_DBG("%s urb %p status %d count %d", hdev->name,
632                                         urb, urb->status, urb->actual_length);
633
634         if (!test_bit(HCI_RUNNING, &hdev->flags))
635                 goto done;
636
637         if (!urb->status)
638                 hdev->stat.byte_tx += urb->transfer_buffer_length;
639         else
640                 hdev->stat.err_tx++;
641
642 done:
643         spin_lock(&data->txlock);
644         data->tx_in_flight--;
645         spin_unlock(&data->txlock);
646
647         kfree(urb->setup_packet);
648
649         kfree_skb(skb);
650 }
651
652 static void btusb_isoc_tx_complete(struct urb *urb)
653 {
654         struct sk_buff *skb = urb->context;
655         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
656
657         BT_DBG("%s urb %p status %d count %d", hdev->name,
658                                         urb, urb->status, urb->actual_length);
659
660         if (!test_bit(HCI_RUNNING, &hdev->flags))
661                 goto done;
662
663         if (!urb->status)
664                 hdev->stat.byte_tx += urb->transfer_buffer_length;
665         else
666                 hdev->stat.err_tx++;
667
668 done:
669         kfree(urb->setup_packet);
670
671         kfree_skb(skb);
672 }
673
674 static int btusb_open(struct hci_dev *hdev)
675 {
676         struct btusb_data *data = hdev->driver_data;
677         int err;
678
679         BT_DBG("%s", hdev->name);
680
681         err = usb_autopm_get_interface(data->intf);
682         if (err < 0)
683                 return err;
684
685         data->intf->needs_remote_wakeup = 1;
686
687         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
688                 goto done;
689
690         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
691                 goto done;
692
693         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
694         if (err < 0)
695                 goto failed;
696
697         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
698         if (err < 0) {
699                 usb_kill_anchored_urbs(&data->intr_anchor);
700                 goto failed;
701         }
702
703         set_bit(BTUSB_BULK_RUNNING, &data->flags);
704         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
705
706 done:
707         usb_autopm_put_interface(data->intf);
708         return 0;
709
710 failed:
711         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
712         clear_bit(HCI_RUNNING, &hdev->flags);
713         usb_autopm_put_interface(data->intf);
714         return err;
715 }
716
717 static void btusb_stop_traffic(struct btusb_data *data)
718 {
719         usb_kill_anchored_urbs(&data->intr_anchor);
720         usb_kill_anchored_urbs(&data->bulk_anchor);
721         usb_kill_anchored_urbs(&data->isoc_anchor);
722 }
723
724 static int btusb_close(struct hci_dev *hdev)
725 {
726         struct btusb_data *data = hdev->driver_data;
727         int err;
728
729         BT_DBG("%s", hdev->name);
730
731         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
732                 return 0;
733
734         cancel_work_sync(&data->work);
735         cancel_work_sync(&data->waker);
736
737         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
738         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
739         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
740
741         btusb_stop_traffic(data);
742         err = usb_autopm_get_interface(data->intf);
743         if (err < 0)
744                 goto failed;
745
746         data->intf->needs_remote_wakeup = 0;
747         usb_autopm_put_interface(data->intf);
748
749 failed:
750         usb_scuttle_anchored_urbs(&data->deferred);
751         return 0;
752 }
753
754 static int btusb_flush(struct hci_dev *hdev)
755 {
756         struct btusb_data *data = hdev->driver_data;
757
758         BT_DBG("%s", hdev->name);
759
760         usb_kill_anchored_urbs(&data->tx_anchor);
761
762         return 0;
763 }
764
765 static int btusb_send_frame(struct sk_buff *skb)
766 {
767         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
768         struct btusb_data *data = hdev->driver_data;
769         struct usb_ctrlrequest *dr;
770         struct urb *urb;
771         unsigned int pipe;
772         int err;
773
774         BT_DBG("%s", hdev->name);
775
776         if (!test_bit(HCI_RUNNING, &hdev->flags))
777                 return -EBUSY;
778
779         switch (bt_cb(skb)->pkt_type) {
780         case HCI_COMMAND_PKT:
781                 urb = usb_alloc_urb(0, GFP_ATOMIC);
782                 if (!urb)
783                         return -ENOMEM;
784
785                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
786                 if (!dr) {
787                         usb_free_urb(urb);
788                         return -ENOMEM;
789                 }
790
791                 dr->bRequestType = data->cmdreq_type;
792                 dr->bRequest     = 0;
793                 dr->wIndex       = 0;
794                 dr->wValue       = 0;
795                 dr->wLength      = __cpu_to_le16(skb->len);
796
797                 pipe = usb_sndctrlpipe(data->udev, 0x00);
798
799                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
800                                 skb->data, skb->len, btusb_tx_complete, skb);
801
802                 hdev->stat.cmd_tx++;
803                 break;
804
805         case HCI_ACLDATA_PKT:
806                 if (!data->bulk_tx_ep)
807                         return -ENODEV;
808
809                 urb = usb_alloc_urb(0, GFP_ATOMIC);
810                 if (!urb)
811                         return -ENOMEM;
812
813                 pipe = usb_sndbulkpipe(data->udev,
814                                         data->bulk_tx_ep->bEndpointAddress);
815
816                 usb_fill_bulk_urb(urb, data->udev, pipe,
817                                 skb->data, skb->len, btusb_tx_complete, skb);
818
819                 hdev->stat.acl_tx++;
820                 break;
821
822         case HCI_SCODATA_PKT:
823                 if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1)
824                         return -ENODEV;
825
826                 urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
827                 if (!urb)
828                         return -ENOMEM;
829
830                 pipe = usb_sndisocpipe(data->udev,
831                                         data->isoc_tx_ep->bEndpointAddress);
832
833                 usb_fill_int_urb(urb, data->udev, pipe,
834                                 skb->data, skb->len, btusb_isoc_tx_complete,
835                                 skb, data->isoc_tx_ep->bInterval);
836
837                 urb->transfer_flags  = URB_ISO_ASAP;
838
839                 __fill_isoc_descriptor(urb, skb->len,
840                                 le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
841
842                 hdev->stat.sco_tx++;
843                 goto skip_waking;
844
845         default:
846                 return -EILSEQ;
847         }
848
849         err = inc_tx(data);
850         if (err) {
851                 usb_anchor_urb(urb, &data->deferred);
852                 schedule_work(&data->waker);
853                 err = 0;
854                 goto done;
855         }
856
857 skip_waking:
858         usb_anchor_urb(urb, &data->tx_anchor);
859
860         err = usb_submit_urb(urb, GFP_ATOMIC);
861         if (err < 0) {
862                 BT_ERR("%s urb %p submission failed", hdev->name, urb);
863                 kfree(urb->setup_packet);
864                 usb_unanchor_urb(urb);
865         } else {
866                 usb_mark_last_busy(data->udev);
867         }
868
869 done:
870         usb_free_urb(urb);
871         return err;
872 }
873
874 static void btusb_destruct(struct hci_dev *hdev)
875 {
876         struct btusb_data *data = hdev->driver_data;
877
878         BT_DBG("%s", hdev->name);
879
880         kfree(data);
881 }
882
883 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
884 {
885         struct btusb_data *data = hdev->driver_data;
886
887         BT_DBG("%s evt %d", hdev->name, evt);
888
889         if (hdev->conn_hash.sco_num != data->sco_num) {
890                 data->sco_num = hdev->conn_hash.sco_num;
891                 schedule_work(&data->work);
892         }
893 }
894
895 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
896 {
897         struct btusb_data *data = hdev->driver_data;
898         struct usb_interface *intf = data->isoc;
899         struct usb_endpoint_descriptor *ep_desc;
900         int i, err;
901
902         if (!data->isoc)
903                 return -ENODEV;
904
905         err = usb_set_interface(data->udev, 1, altsetting);
906         if (err < 0) {
907                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
908                 return err;
909         }
910
911         data->isoc_altsetting = altsetting;
912
913         data->isoc_tx_ep = NULL;
914         data->isoc_rx_ep = NULL;
915
916         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
917                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
918
919                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
920                         data->isoc_tx_ep = ep_desc;
921                         continue;
922                 }
923
924                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
925                         data->isoc_rx_ep = ep_desc;
926                         continue;
927                 }
928         }
929
930         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
931                 BT_ERR("%s invalid SCO descriptors", hdev->name);
932                 return -ENODEV;
933         }
934
935         return 0;
936 }
937
938 static void btusb_work(struct work_struct *work)
939 {
940         struct btusb_data *data = container_of(work, struct btusb_data, work);
941         struct hci_dev *hdev = data->hdev;
942         int err;
943
944         if (hdev->conn_hash.sco_num > 0) {
945                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
946                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
947                         if (err < 0) {
948                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
949                                 usb_kill_anchored_urbs(&data->isoc_anchor);
950                                 return;
951                         }
952
953                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
954                 }
955                 if (data->isoc_altsetting != 2) {
956                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
957                         usb_kill_anchored_urbs(&data->isoc_anchor);
958
959                         if (__set_isoc_interface(hdev, 2) < 0)
960                                 return;
961                 }
962
963                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
964                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
965                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
966                         else
967                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
968                 }
969         } else {
970                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
971                 usb_kill_anchored_urbs(&data->isoc_anchor);
972
973                 __set_isoc_interface(hdev, 0);
974                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
975                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
976         }
977 }
978
979 static void btusb_waker(struct work_struct *work)
980 {
981         struct btusb_data *data = container_of(work, struct btusb_data, waker);
982         int err;
983
984         err = usb_autopm_get_interface(data->intf);
985         if (err < 0)
986                 return;
987
988         usb_autopm_put_interface(data->intf);
989 }
990
991 static int btusb_probe(struct usb_interface *intf,
992                                 const struct usb_device_id *id)
993 {
994         struct usb_endpoint_descriptor *ep_desc;
995         struct btusb_data *data;
996         struct hci_dev *hdev;
997         int i, err;
998
999         BT_DBG("intf %p id %p", intf, id);
1000
1001         /* interface numbers are hardcoded in the spec */
1002         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
1003                 return -ENODEV;
1004
1005         if (!id->driver_info) {
1006                 const struct usb_device_id *match;
1007                 match = usb_match_id(intf, blacklist_table);
1008                 if (match)
1009                         id = match;
1010         }
1011
1012         if (id->driver_info == BTUSB_IGNORE)
1013                 return -ENODEV;
1014
1015         if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
1016                 return -ENODEV;
1017
1018         if (ignore_csr && id->driver_info & BTUSB_CSR)
1019                 return -ENODEV;
1020
1021         if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
1022                 return -ENODEV;
1023
1024         if (id->driver_info & BTUSB_ATH3012) {
1025                 struct usb_device *udev = interface_to_usbdev(intf);
1026
1027                 /* Old firmware would otherwise let ath3k driver load
1028                  * patch and sysconfig files */
1029                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
1030                         return -ENODEV;
1031         }
1032
1033         data = kzalloc(sizeof(*data), GFP_KERNEL);
1034         if (!data)
1035                 return -ENOMEM;
1036
1037         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1038                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1039
1040                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
1041                         data->intr_ep = ep_desc;
1042                         continue;
1043                 }
1044
1045                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
1046                         data->bulk_tx_ep = ep_desc;
1047                         continue;
1048                 }
1049
1050                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
1051                         data->bulk_rx_ep = ep_desc;
1052                         continue;
1053                 }
1054         }
1055
1056         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
1057                 kfree(data);
1058                 return -ENODEV;
1059         }
1060
1061         data->cmdreq_type = USB_TYPE_CLASS;
1062
1063         data->udev = interface_to_usbdev(intf);
1064         data->intf = intf;
1065
1066         spin_lock_init(&data->lock);
1067
1068         INIT_WORK(&data->work, btusb_work);
1069         INIT_WORK(&data->waker, btusb_waker);
1070         spin_lock_init(&data->txlock);
1071
1072         init_usb_anchor(&data->tx_anchor);
1073         init_usb_anchor(&data->intr_anchor);
1074         init_usb_anchor(&data->bulk_anchor);
1075         init_usb_anchor(&data->isoc_anchor);
1076         init_usb_anchor(&data->deferred);
1077
1078         hdev = hci_alloc_dev();
1079         if (!hdev) {
1080                 kfree(data);
1081                 return -ENOMEM;
1082         }
1083
1084         hdev->bus = HCI_USB;
1085         hdev->driver_data = data;
1086
1087         data->hdev = hdev;
1088
1089         SET_HCIDEV_DEV(hdev, &intf->dev);
1090
1091         hdev->open     = btusb_open;
1092         hdev->close    = btusb_close;
1093         hdev->flush    = btusb_flush;
1094         hdev->send     = btusb_send_frame;
1095         hdev->destruct = btusb_destruct;
1096         hdev->notify   = btusb_notify;
1097
1098         hdev->owner = THIS_MODULE;
1099
1100         if (id->driver_info & BTUSB_INTEL_BOOT)
1101                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1102
1103         /* Interface numbers are hardcoded in the specification */
1104         data->isoc = usb_ifnum_to_if(data->udev, 1);
1105
1106         if (!reset)
1107                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1108
1109         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
1110                 if (!disable_scofix)
1111                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
1112         }
1113
1114         if (id->driver_info & BTUSB_BROKEN_ISOC)
1115                 data->isoc = NULL;
1116
1117         if (id->driver_info & BTUSB_DIGIANSWER) {
1118                 data->cmdreq_type = USB_TYPE_VENDOR;
1119                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1120         }
1121
1122         if (id->driver_info & BTUSB_CSR) {
1123                 struct usb_device *udev = data->udev;
1124
1125                 /* Old firmware would otherwise execute USB reset */
1126                 if (le16_to_cpu(udev->descriptor.bcdDevice) < 0x117)
1127                         set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
1128         }
1129
1130         if (id->driver_info & BTUSB_SNIFFER) {
1131                 struct usb_device *udev = data->udev;
1132
1133                 /* New sniffer firmware has crippled HCI interface */
1134                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
1135                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1136
1137                 data->isoc = NULL;
1138         }
1139
1140         if (id->driver_info & BTUSB_BCM92035) {
1141                 unsigned char cmd[] = { 0x3b, 0xfc, 0x01, 0x00 };
1142                 struct sk_buff *skb;
1143
1144                 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1145                 if (skb) {
1146                         memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
1147                         skb_queue_tail(&hdev->driver_init, skb);
1148                 }
1149         }
1150
1151         if (data->isoc) {
1152                 err = usb_driver_claim_interface(&btusb_driver,
1153                                                         data->isoc, data);
1154                 if (err < 0) {
1155                         hci_free_dev(hdev);
1156                         kfree(data);
1157                         return err;
1158                 }
1159         }
1160
1161         err = hci_register_dev(hdev);
1162         if (err < 0) {
1163                 hci_free_dev(hdev);
1164                 kfree(data);
1165                 return err;
1166         }
1167
1168         usb_set_intfdata(intf, data);
1169
1170         return 0;
1171 }
1172
1173 static void btusb_disconnect(struct usb_interface *intf)
1174 {
1175         struct btusb_data *data = usb_get_intfdata(intf);
1176         struct hci_dev *hdev;
1177
1178         BT_DBG("intf %p", intf);
1179
1180         if (!data)
1181                 return;
1182
1183         hdev = data->hdev;
1184
1185         __hci_dev_hold(hdev);
1186
1187         usb_set_intfdata(data->intf, NULL);
1188
1189         if (data->isoc)
1190                 usb_set_intfdata(data->isoc, NULL);
1191
1192         hci_unregister_dev(hdev);
1193
1194         if (intf == data->isoc)
1195                 usb_driver_release_interface(&btusb_driver, data->intf);
1196         else if (data->isoc)
1197                 usb_driver_release_interface(&btusb_driver, data->isoc);
1198
1199         __hci_dev_put(hdev);
1200
1201         hci_free_dev(hdev);
1202 }
1203
1204 #ifdef CONFIG_PM
1205 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
1206 {
1207         struct btusb_data *data = usb_get_intfdata(intf);
1208
1209         BT_DBG("intf %p", intf);
1210
1211         if (data->suspend_count++)
1212                 return 0;
1213
1214         spin_lock_irq(&data->txlock);
1215         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
1216                 set_bit(BTUSB_SUSPENDING, &data->flags);
1217                 spin_unlock_irq(&data->txlock);
1218         } else {
1219                 spin_unlock_irq(&data->txlock);
1220                 data->suspend_count--;
1221                 return -EBUSY;
1222         }
1223
1224         cancel_work_sync(&data->work);
1225
1226         btusb_stop_traffic(data);
1227         usb_kill_anchored_urbs(&data->tx_anchor);
1228
1229         return 0;
1230 }
1231
1232 static void play_deferred(struct btusb_data *data)
1233 {
1234         struct urb *urb;
1235         int err;
1236
1237         while ((urb = usb_get_from_anchor(&data->deferred))) {
1238                 err = usb_submit_urb(urb, GFP_ATOMIC);
1239                 if (err < 0)
1240                         break;
1241
1242                 data->tx_in_flight++;
1243         }
1244         usb_scuttle_anchored_urbs(&data->deferred);
1245 }
1246
1247 static int btusb_resume(struct usb_interface *intf)
1248 {
1249         struct btusb_data *data = usb_get_intfdata(intf);
1250         struct hci_dev *hdev = data->hdev;
1251         int err = 0;
1252
1253         BT_DBG("intf %p", intf);
1254
1255         if (--data->suspend_count)
1256                 return 0;
1257
1258         if (!test_bit(HCI_RUNNING, &hdev->flags))
1259                 goto done;
1260
1261         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
1262                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
1263                 if (err < 0) {
1264                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1265                         goto failed;
1266                 }
1267         }
1268
1269         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
1270                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
1271                 if (err < 0) {
1272                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1273                         goto failed;
1274                 }
1275
1276                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
1277         }
1278
1279         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1280                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
1281                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1282                 else
1283                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
1284         }
1285
1286         spin_lock_irq(&data->txlock);
1287         play_deferred(data);
1288         clear_bit(BTUSB_SUSPENDING, &data->flags);
1289         spin_unlock_irq(&data->txlock);
1290         schedule_work(&data->work);
1291
1292         return 0;
1293
1294 failed:
1295         usb_scuttle_anchored_urbs(&data->deferred);
1296 done:
1297         spin_lock_irq(&data->txlock);
1298         clear_bit(BTUSB_SUSPENDING, &data->flags);
1299         spin_unlock_irq(&data->txlock);
1300
1301         return err;
1302 }
1303 #endif
1304
1305 static struct usb_driver btusb_driver = {
1306         .name           = "btusb",
1307         .probe          = btusb_probe,
1308         .disconnect     = btusb_disconnect,
1309 #ifdef CONFIG_PM
1310         .suspend        = btusb_suspend,
1311         .resume         = btusb_resume,
1312 #endif
1313         .id_table       = btusb_table,
1314         .supports_autosuspend = 1,
1315 };
1316
1317 static int __init btusb_init(void)
1318 {
1319         BT_INFO("Generic Bluetooth USB driver ver %s", VERSION);
1320
1321         return usb_register(&btusb_driver);
1322 }
1323
1324 static void __exit btusb_exit(void)
1325 {
1326         usb_deregister(&btusb_driver);
1327 }
1328
1329 module_init(btusb_init);
1330 module_exit(btusb_exit);
1331
1332 module_param(ignore_dga, bool, 0644);
1333 MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
1334
1335 module_param(ignore_csr, bool, 0644);
1336 MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
1337
1338 module_param(ignore_sniffer, bool, 0644);
1339 MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
1340
1341 module_param(disable_scofix, bool, 0644);
1342 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
1343
1344 module_param(force_scofix, bool, 0644);
1345 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
1346
1347 module_param(reset, bool, 0644);
1348 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
1349
1350 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1351 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
1352 MODULE_VERSION(VERSION);
1353 MODULE_LICENSE("GPL");