Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/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/module.h>
 25 #include <linux/usb.h>
 26 #include <linux/firmware.h>
 27 
 28 #include <net/bluetooth/bluetooth.h>
 29 #include <net/bluetooth/hci_core.h>
 30 
 31 #define VERSION "0.6"
 32 
 33 static bool ignore_dga;
 34 static bool ignore_csr;
 35 static bool ignore_sniffer;
 36 static bool disable_scofix;
 37 static bool force_scofix;
 38 
 39 static bool reset = 1;
 40 
 41 static struct usb_driver btusb_driver;
 42 
 43 #define BTUSB_IGNORE            0x01
 44 #define BTUSB_DIGIANSWER        0x02
 45 #define BTUSB_CSR               0x04
 46 #define BTUSB_SNIFFER           0x08
 47 #define BTUSB_BCM92035          0x10
 48 #define BTUSB_BROKEN_ISOC       0x20
 49 #define BTUSB_WRONG_SCO_MTU     0x40
 50 #define BTUSB_ATH3012           0x80
 51 #define BTUSB_INTEL             0x100
 52 
 53 static const struct usb_device_id btusb_table[] = {
 54         /* Generic Bluetooth USB device */
 55         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
 56 
 57         /* Apple-specific (Broadcom) devices */
 58         { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01) },
 59 
 60         /* MediaTek MT76x0E */
 61         { USB_DEVICE(0x0e8d, 0x763f) },
 62 
 63         /* Broadcom SoftSailing reporting vendor specific */
 64         { USB_DEVICE(0x0a5c, 0x21e1) },
 65 
 66         /* Apple MacBookPro 7,1 */
 67         { USB_DEVICE(0x05ac, 0x8213) },
 68 
 69         /* Apple iMac11,1 */
 70         { USB_DEVICE(0x05ac, 0x8215) },
 71 
 72         /* Apple MacBookPro6,2 */
 73         { USB_DEVICE(0x05ac, 0x8218) },
 74 
 75         /* Apple MacBookAir3,1, MacBookAir3,2 */
 76         { USB_DEVICE(0x05ac, 0x821b) },
 77 
 78         /* Apple MacBookAir4,1 */
 79         { USB_DEVICE(0x05ac, 0x821f) },
 80 
 81         /* Apple MacBookPro8,2 */
 82         { USB_DEVICE(0x05ac, 0x821a) },
 83 
 84         /* Apple MacMini5,1 */
 85         { USB_DEVICE(0x05ac, 0x8281) },
 86 
 87         /* AVM BlueFRITZ! USB v2.0 */
 88         { USB_DEVICE(0x057c, 0x3800) },
 89 
 90         /* Bluetooth Ultraport Module from IBM */
 91         { USB_DEVICE(0x04bf, 0x030a) },
 92 
 93         /* ALPS Modules with non-standard id */
 94         { USB_DEVICE(0x044e, 0x3001) },
 95         { USB_DEVICE(0x044e, 0x3002) },
 96 
 97         /* Ericsson with non-standard id */
 98         { USB_DEVICE(0x0bdb, 0x1002) },
 99 
100         /* Canyon CN-BTU1 with HID interfaces */
101         { USB_DEVICE(0x0c10, 0x0000) },
102 
103         /* Broadcom BCM20702A0 */
104         { USB_DEVICE(0x0489, 0xe042) },
105         { USB_DEVICE(0x04ca, 0x2003) },
106         { USB_DEVICE(0x0b05, 0x17b5) },
107         { USB_DEVICE(0x0b05, 0x17cb) },
108         { USB_DEVICE(0x413c, 0x8197) },
109 
110         /* Foxconn - Hon Hai */
111         { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01) },
112 
113         /* Broadcom devices with vendor specific id */
114         { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01) },
115 
116         /* Belkin F8065bf - Broadcom based */
117         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01) },
118 
119         /* IMC Networks - Broadcom based */
120         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01) },
121 
122         { }     /* Terminating entry */
123 };
124 
125 MODULE_DEVICE_TABLE(usb, btusb_table);
126 
127 static const struct usb_device_id blacklist_table[] = {
128         /* CSR BlueCore devices */
129         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
130 
131         /* Broadcom BCM2033 without firmware */
132         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
133 
134         /* Atheros 3011 with sflash firmware */
135         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
136         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
137         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
138         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
139         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
140         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
141 
142         /* Atheros AR9285 Malbec with sflash firmware */
143         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
144 
145         /* Atheros 3012 with sflash firmware */
146         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
147         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
148         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
149         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
150         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
151         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
152         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
153         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
154         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
155         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
156         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
157         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
158         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
159         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
160         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
161         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
162         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
163         { USB_DEVICE(0x0cf3, 0x3005), .driver_info = BTUSB_ATH3012 },
164         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
165         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
166         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
167         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
168         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
169         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
170         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
171         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
172         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
173         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
174         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
175         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
176         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
177 
178         /* Atheros AR5BBU12 with sflash firmware */
179         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
180 
181         /* Atheros AR5BBU12 with sflash firmware */
182         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
183         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
184 
185         /* Broadcom BCM2035 */
186         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
187         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
188         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
189 
190         /* Broadcom BCM2045 */
191         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
192         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
193 
194         /* IBM/Lenovo ThinkPad with Broadcom chip */
195         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
196         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
197 
198         /* HP laptop with Broadcom chip */
199         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
200 
201         /* Dell laptop with Broadcom chip */
202         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
203 
204         /* Dell Wireless 370 and 410 devices */
205         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
206         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
207 
208         /* Belkin F8T012 and F8T013 devices */
209         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
210         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
211 
212         /* Asus WL-BTD202 device */
213         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
214 
215         /* Kensington Bluetooth USB adapter */
216         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
217 
218         /* RTX Telecom based adapters with buggy SCO support */
219         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
220         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
221 
222         /* CONWISE Technology based adapters with buggy SCO support */
223         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
224 
225         /* Digianswer devices */
226         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
227         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
228 
229         /* CSR BlueCore Bluetooth Sniffer */
230         { USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
231 
232         /* Frontline ComProbe Bluetooth Sniffer */
233         { USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },
234 
235         /* Intel Bluetooth device */
236         { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
237         { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },
238 
239         { }     /* Terminating entry */
240 };
241 
242 #define BTUSB_MAX_ISOC_FRAMES   10
243 
244 #define BTUSB_INTR_RUNNING      0
245 #define BTUSB_BULK_RUNNING      1
246 #define BTUSB_ISOC_RUNNING      2
247 #define BTUSB_SUSPENDING        3
248 #define BTUSB_DID_ISO_RESUME    4
249 
250 struct btusb_data {
251         struct hci_dev       *hdev;
252         struct usb_device    *udev;
253         struct usb_interface *intf;
254         struct usb_interface *isoc;
255 
256         spinlock_t lock;
257 
258         unsigned long flags;
259 
260         struct work_struct work;
261         struct work_struct waker;
262 
263         struct usb_anchor tx_anchor;
264         struct usb_anchor intr_anchor;
265         struct usb_anchor bulk_anchor;
266         struct usb_anchor isoc_anchor;
267         struct usb_anchor deferred;
268         int tx_in_flight;
269         spinlock_t txlock;
270 
271         struct usb_endpoint_descriptor *intr_ep;
272         struct usb_endpoint_descriptor *bulk_tx_ep;
273         struct usb_endpoint_descriptor *bulk_rx_ep;
274         struct usb_endpoint_descriptor *isoc_tx_ep;
275         struct usb_endpoint_descriptor *isoc_rx_ep;
276 
277         __u8 cmdreq_type;
278 
279         unsigned int sco_num;
280         int isoc_altsetting;
281         int suspend_count;
282 };
283 
284 static int inc_tx(struct btusb_data *data)
285 {
286         unsigned long flags;
287         int rv;
288 
289         spin_lock_irqsave(&data->txlock, flags);
290         rv = test_bit(BTUSB_SUSPENDING, &data->flags);
291         if (!rv)
292                 data->tx_in_flight++;
293         spin_unlock_irqrestore(&data->txlock, flags);
294 
295         return rv;
296 }
297 
298 static void btusb_intr_complete(struct urb *urb)
299 {
300         struct hci_dev *hdev = urb->context;
301         struct btusb_data *data = hci_get_drvdata(hdev);
302         int err;
303 
304         BT_DBG("%s urb %p status %d count %d", hdev->name,
305                                         urb, urb->status, urb->actual_length);
306 
307         if (!test_bit(HCI_RUNNING, &hdev->flags))
308                 return;
309 
310         if (urb->status == 0) {
311                 hdev->stat.byte_rx += urb->actual_length;
312 
313                 if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
314                                                 urb->transfer_buffer,
315                                                 urb->actual_length) < 0) {
316                         BT_ERR("%s corrupted event packet", hdev->name);
317                         hdev->stat.err_rx++;
318                 }
319         }
320 
321         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
322                 return;
323 
324         usb_mark_last_busy(data->udev);
325         usb_anchor_urb(urb, &data->intr_anchor);
326 
327         err = usb_submit_urb(urb, GFP_ATOMIC);
328         if (err < 0) {
329                 /* -EPERM: urb is being killed;
330                  * -ENODEV: device got disconnected */
331                 if (err != -EPERM && err != -ENODEV)
332                         BT_ERR("%s urb %p failed to resubmit (%d)",
333                                                 hdev->name, urb, -err);
334                 usb_unanchor_urb(urb);
335         }
336 }
337 
338 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
339 {
340         struct btusb_data *data = hci_get_drvdata(hdev);
341         struct urb *urb;
342         unsigned char *buf;
343         unsigned int pipe;
344         int err, size;
345 
346         BT_DBG("%s", hdev->name);
347 
348         if (!data->intr_ep)
349                 return -ENODEV;
350 
351         urb = usb_alloc_urb(0, mem_flags);
352         if (!urb)
353                 return -ENOMEM;
354 
355         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
356 
357         buf = kmalloc(size, mem_flags);
358         if (!buf) {
359                 usb_free_urb(urb);
360                 return -ENOMEM;
361         }
362 
363         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
364 
365         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
366                                                 btusb_intr_complete, hdev,
367                                                 data->intr_ep->bInterval);
368 
369         urb->transfer_flags |= URB_FREE_BUFFER;
370 
371         usb_anchor_urb(urb, &data->intr_anchor);
372 
373         err = usb_submit_urb(urb, mem_flags);
374         if (err < 0) {
375                 if (err != -EPERM && err != -ENODEV)
376                         BT_ERR("%s urb %p submission failed (%d)",
377                                                 hdev->name, urb, -err);
378                 usb_unanchor_urb(urb);
379         }
380 
381         usb_free_urb(urb);
382 
383         return err;
384 }
385 
386 static void btusb_bulk_complete(struct urb *urb)
387 {
388         struct hci_dev *hdev = urb->context;
389         struct btusb_data *data = hci_get_drvdata(hdev);
390         int err;
391 
392         BT_DBG("%s urb %p status %d count %d", hdev->name,
393                                         urb, urb->status, urb->actual_length);
394 
395         if (!test_bit(HCI_RUNNING, &hdev->flags))
396                 return;
397 
398         if (urb->status == 0) {
399                 hdev->stat.byte_rx += urb->actual_length;
400 
401                 if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
402                                                 urb->transfer_buffer,
403                                                 urb->actual_length) < 0) {
404                         BT_ERR("%s corrupted ACL packet", hdev->name);
405                         hdev->stat.err_rx++;
406                 }
407         }
408 
409         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
410                 return;
411 
412         usb_anchor_urb(urb, &data->bulk_anchor);
413         usb_mark_last_busy(data->udev);
414 
415         err = usb_submit_urb(urb, GFP_ATOMIC);
416         if (err < 0) {
417                 /* -EPERM: urb is being killed;
418                  * -ENODEV: device got disconnected */
419                 if (err != -EPERM && err != -ENODEV)
420                         BT_ERR("%s urb %p failed to resubmit (%d)",
421                                                 hdev->name, urb, -err);
422                 usb_unanchor_urb(urb);
423         }
424 }
425 
426 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
427 {
428         struct btusb_data *data = hci_get_drvdata(hdev);
429         struct urb *urb;
430         unsigned char *buf;
431         unsigned int pipe;
432         int err, size = HCI_MAX_FRAME_SIZE;
433 
434         BT_DBG("%s", hdev->name);
435 
436         if (!data->bulk_rx_ep)
437                 return -ENODEV;
438 
439         urb = usb_alloc_urb(0, mem_flags);
440         if (!urb)
441                 return -ENOMEM;
442 
443         buf = kmalloc(size, mem_flags);
444         if (!buf) {
445                 usb_free_urb(urb);
446                 return -ENOMEM;
447         }
448 
449         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
450 
451         usb_fill_bulk_urb(urb, data->udev, pipe,
452                                         buf, size, btusb_bulk_complete, hdev);
453 
454         urb->transfer_flags |= URB_FREE_BUFFER;
455 
456         usb_mark_last_busy(data->udev);
457         usb_anchor_urb(urb, &data->bulk_anchor);
458 
459         err = usb_submit_urb(urb, mem_flags);
460         if (err < 0) {
461                 if (err != -EPERM && err != -ENODEV)
462                         BT_ERR("%s urb %p submission failed (%d)",
463                                                 hdev->name, urb, -err);
464                 usb_unanchor_urb(urb);
465         }
466 
467         usb_free_urb(urb);
468 
469         return err;
470 }
471 
472 static void btusb_isoc_complete(struct urb *urb)
473 {
474         struct hci_dev *hdev = urb->context;
475         struct btusb_data *data = hci_get_drvdata(hdev);
476         int i, err;
477 
478         BT_DBG("%s urb %p status %d count %d", hdev->name,
479                                         urb, urb->status, urb->actual_length);
480 
481         if (!test_bit(HCI_RUNNING, &hdev->flags))
482                 return;
483 
484         if (urb->status == 0) {
485                 for (i = 0; i < urb->number_of_packets; i++) {
486                         unsigned int offset = urb->iso_frame_desc[i].offset;
487                         unsigned int length = urb->iso_frame_desc[i].actual_length;
488 
489                         if (urb->iso_frame_desc[i].status)
490                                 continue;
491 
492                         hdev->stat.byte_rx += length;
493 
494                         if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
495                                                 urb->transfer_buffer + offset,
496                                                                 length) < 0) {
497                                 BT_ERR("%s corrupted SCO packet", hdev->name);
498                                 hdev->stat.err_rx++;
499                         }
500                 }
501         }
502 
503         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
504                 return;
505 
506         usb_anchor_urb(urb, &data->isoc_anchor);
507 
508         err = usb_submit_urb(urb, GFP_ATOMIC);
509         if (err < 0) {
510                 /* -EPERM: urb is being killed;
511                  * -ENODEV: device got disconnected */
512                 if (err != -EPERM && err != -ENODEV)
513                         BT_ERR("%s urb %p failed to resubmit (%d)",
514                                                 hdev->name, urb, -err);
515                 usb_unanchor_urb(urb);
516         }
517 }
518 
519 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
520 {
521         int i, offset = 0;
522 
523         BT_DBG("len %d mtu %d", len, mtu);
524 
525         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
526                                         i++, offset += mtu, len -= mtu) {
527                 urb->iso_frame_desc[i].offset = offset;
528                 urb->iso_frame_desc[i].length = mtu;
529         }
530 
531         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
532                 urb->iso_frame_desc[i].offset = offset;
533                 urb->iso_frame_desc[i].length = len;
534                 i++;
535         }
536 
537         urb->number_of_packets = i;
538 }
539 
540 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
541 {
542         struct btusb_data *data = hci_get_drvdata(hdev);
543         struct urb *urb;
544         unsigned char *buf;
545         unsigned int pipe;
546         int err, size;
547 
548         BT_DBG("%s", hdev->name);
549 
550         if (!data->isoc_rx_ep)
551                 return -ENODEV;
552 
553         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
554         if (!urb)
555                 return -ENOMEM;
556 
557         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
558                                                 BTUSB_MAX_ISOC_FRAMES;
559 
560         buf = kmalloc(size, mem_flags);
561         if (!buf) {
562                 usb_free_urb(urb);
563                 return -ENOMEM;
564         }
565 
566         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
567 
568         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
569                                 hdev, data->isoc_rx_ep->bInterval);
570 
571         urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
572 
573         __fill_isoc_descriptor(urb, size,
574                         le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
575 
576         usb_anchor_urb(urb, &data->isoc_anchor);
577 
578         err = usb_submit_urb(urb, mem_flags);
579         if (err < 0) {
580                 if (err != -EPERM && err != -ENODEV)
581                         BT_ERR("%s urb %p submission failed (%d)",
582                                                 hdev->name, urb, -err);
583                 usb_unanchor_urb(urb);
584         }
585 
586         usb_free_urb(urb);
587 
588         return err;
589 }
590 
591 static void btusb_tx_complete(struct urb *urb)
592 {
593         struct sk_buff *skb = urb->context;
594         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
595         struct btusb_data *data = hci_get_drvdata(hdev);
596 
597         BT_DBG("%s urb %p status %d count %d", hdev->name,
598                                         urb, urb->status, urb->actual_length);
599 
600         if (!test_bit(HCI_RUNNING, &hdev->flags))
601                 goto done;
602 
603         if (!urb->status)
604                 hdev->stat.byte_tx += urb->transfer_buffer_length;
605         else
606                 hdev->stat.err_tx++;
607 
608 done:
609         spin_lock(&data->txlock);
610         data->tx_in_flight--;
611         spin_unlock(&data->txlock);
612 
613         kfree(urb->setup_packet);
614 
615         kfree_skb(skb);
616 }
617 
618 static void btusb_isoc_tx_complete(struct urb *urb)
619 {
620         struct sk_buff *skb = urb->context;
621         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
622 
623         BT_DBG("%s urb %p status %d count %d", hdev->name,
624                                         urb, urb->status, urb->actual_length);
625 
626         if (!test_bit(HCI_RUNNING, &hdev->flags))
627                 goto done;
628 
629         if (!urb->status)
630                 hdev->stat.byte_tx += urb->transfer_buffer_length;
631         else
632                 hdev->stat.err_tx++;
633 
634 done:
635         kfree(urb->setup_packet);
636 
637         kfree_skb(skb);
638 }
639 
640 static int btusb_open(struct hci_dev *hdev)
641 {
642         struct btusb_data *data = hci_get_drvdata(hdev);
643         int err;
644 
645         BT_DBG("%s", hdev->name);
646 
647         err = usb_autopm_get_interface(data->intf);
648         if (err < 0)
649                 return err;
650 
651         data->intf->needs_remote_wakeup = 1;
652 
653         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
654                 goto done;
655 
656         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
657                 goto done;
658 
659         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
660         if (err < 0)
661                 goto failed;
662 
663         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
664         if (err < 0) {
665                 usb_kill_anchored_urbs(&data->intr_anchor);
666                 goto failed;
667         }
668 
669         set_bit(BTUSB_BULK_RUNNING, &data->flags);
670         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
671 
672 done:
673         usb_autopm_put_interface(data->intf);
674         return 0;
675 
676 failed:
677         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
678         clear_bit(HCI_RUNNING, &hdev->flags);
679         usb_autopm_put_interface(data->intf);
680         return err;
681 }
682 
683 static void btusb_stop_traffic(struct btusb_data *data)
684 {
685         usb_kill_anchored_urbs(&data->intr_anchor);
686         usb_kill_anchored_urbs(&data->bulk_anchor);
687         usb_kill_anchored_urbs(&data->isoc_anchor);
688 }
689 
690 static int btusb_close(struct hci_dev *hdev)
691 {
692         struct btusb_data *data = hci_get_drvdata(hdev);
693         int err;
694 
695         BT_DBG("%s", hdev->name);
696 
697         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
698                 return 0;
699 
700         cancel_work_sync(&data->work);
701         cancel_work_sync(&data->waker);
702 
703         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
704         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
705         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
706 
707         btusb_stop_traffic(data);
708         err = usb_autopm_get_interface(data->intf);
709         if (err < 0)
710                 goto failed;
711 
712         data->intf->needs_remote_wakeup = 0;
713         usb_autopm_put_interface(data->intf);
714 
715 failed:
716         usb_scuttle_anchored_urbs(&data->deferred);
717         return 0;
718 }
719 
720 static int btusb_flush(struct hci_dev *hdev)
721 {
722         struct btusb_data *data = hci_get_drvdata(hdev);
723 
724         BT_DBG("%s", hdev->name);
725 
726         usb_kill_anchored_urbs(&data->tx_anchor);
727 
728         return 0;
729 }
730 
731 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
732 {
733         struct btusb_data *data = hci_get_drvdata(hdev);
734         struct usb_ctrlrequest *dr;
735         struct urb *urb;
736         unsigned int pipe;
737         int err;
738 
739         BT_DBG("%s", hdev->name);
740 
741         if (!test_bit(HCI_RUNNING, &hdev->flags))
742                 return -EBUSY;
743 
744         skb->dev = (void *) hdev;
745 
746         switch (bt_cb(skb)->pkt_type) {
747         case HCI_COMMAND_PKT:
748                 urb = usb_alloc_urb(0, GFP_ATOMIC);
749                 if (!urb)
750                         return -ENOMEM;
751 
752                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
753                 if (!dr) {
754                         usb_free_urb(urb);
755                         return -ENOMEM;
756                 }
757 
758                 dr->bRequestType = data->cmdreq_type;
759                 dr->bRequest     = 0;
760                 dr->wIndex       = 0;
761                 dr->wValue       = 0;
762                 dr->wLength      = __cpu_to_le16(skb->len);
763 
764                 pipe = usb_sndctrlpipe(data->udev, 0x00);
765 
766                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
767                                 skb->data, skb->len, btusb_tx_complete, skb);
768 
769                 hdev->stat.cmd_tx++;
770                 break;
771 
772         case HCI_ACLDATA_PKT:
773                 if (!data->bulk_tx_ep)
774                         return -ENODEV;
775 
776                 urb = usb_alloc_urb(0, GFP_ATOMIC);
777                 if (!urb)
778                         return -ENOMEM;
779 
780                 pipe = usb_sndbulkpipe(data->udev,
781                                         data->bulk_tx_ep->bEndpointAddress);
782 
783                 usb_fill_bulk_urb(urb, data->udev, pipe,
784                                 skb->data, skb->len, btusb_tx_complete, skb);
785 
786                 hdev->stat.acl_tx++;
787                 break;
788 
789         case HCI_SCODATA_PKT:
790                 if (!data->isoc_tx_ep || hci_conn_num(hdev, SCO_LINK) < 1)
791                         return -ENODEV;
792 
793                 urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
794                 if (!urb)
795                         return -ENOMEM;
796 
797                 pipe = usb_sndisocpipe(data->udev,
798                                         data->isoc_tx_ep->bEndpointAddress);
799 
800                 usb_fill_int_urb(urb, data->udev, pipe,
801                                 skb->data, skb->len, btusb_isoc_tx_complete,
802                                 skb, data->isoc_tx_ep->bInterval);
803 
804                 urb->transfer_flags  = URB_ISO_ASAP;
805 
806                 __fill_isoc_descriptor(urb, skb->len,
807                                 le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
808 
809                 hdev->stat.sco_tx++;
810                 goto skip_waking;
811 
812         default:
813                 return -EILSEQ;
814         }
815 
816         err = inc_tx(data);
817         if (err) {
818                 usb_anchor_urb(urb, &data->deferred);
819                 schedule_work(&data->waker);
820                 err = 0;
821                 goto done;
822         }
823 
824 skip_waking:
825         usb_anchor_urb(urb, &data->tx_anchor);
826 
827         err = usb_submit_urb(urb, GFP_ATOMIC);
828         if (err < 0) {
829                 if (err != -EPERM && err != -ENODEV)
830                         BT_ERR("%s urb %p submission failed (%d)",
831                                                 hdev->name, urb, -err);
832                 kfree(urb->setup_packet);
833                 usb_unanchor_urb(urb);
834         } else {
835                 usb_mark_last_busy(data->udev);
836         }
837 
838 done:
839         usb_free_urb(urb);
840         return err;
841 }
842 
843 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
844 {
845         struct btusb_data *data = hci_get_drvdata(hdev);
846 
847         BT_DBG("%s evt %d", hdev->name, evt);
848 
849         if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
850                 data->sco_num = hci_conn_num(hdev, SCO_LINK);
851                 schedule_work(&data->work);
852         }
853 }
854 
855 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
856 {
857         struct btusb_data *data = hci_get_drvdata(hdev);
858         struct usb_interface *intf = data->isoc;
859         struct usb_endpoint_descriptor *ep_desc;
860         int i, err;
861 
862         if (!data->isoc)
863                 return -ENODEV;
864 
865         err = usb_set_interface(data->udev, 1, altsetting);
866         if (err < 0) {
867                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
868                 return err;
869         }
870 
871         data->isoc_altsetting = altsetting;
872 
873         data->isoc_tx_ep = NULL;
874         data->isoc_rx_ep = NULL;
875 
876         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
877                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
878 
879                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
880                         data->isoc_tx_ep = ep_desc;
881                         continue;
882                 }
883 
884                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
885                         data->isoc_rx_ep = ep_desc;
886                         continue;
887                 }
888         }
889 
890         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
891                 BT_ERR("%s invalid SCO descriptors", hdev->name);
892                 return -ENODEV;
893         }
894 
895         return 0;
896 }
897 
898 static void btusb_work(struct work_struct *work)
899 {
900         struct btusb_data *data = container_of(work, struct btusb_data, work);
901         struct hci_dev *hdev = data->hdev;
902         int new_alts;
903         int err;
904 
905         if (data->sco_num > 0) {
906                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
907                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
908                         if (err < 0) {
909                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
910                                 usb_kill_anchored_urbs(&data->isoc_anchor);
911                                 return;
912                         }
913 
914                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
915                 }
916 
917                 if (hdev->voice_setting & 0x0020) {
918                         static const int alts[3] = { 2, 4, 5 };
919                         new_alts = alts[data->sco_num - 1];
920                 } else {
921                         new_alts = data->sco_num;
922                 }
923 
924                 if (data->isoc_altsetting != new_alts) {
925                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
926                         usb_kill_anchored_urbs(&data->isoc_anchor);
927 
928                         if (__set_isoc_interface(hdev, new_alts) < 0)
929                                 return;
930                 }
931 
932                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
933                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
934                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
935                         else
936                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
937                 }
938         } else {
939                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
940                 usb_kill_anchored_urbs(&data->isoc_anchor);
941 
942                 __set_isoc_interface(hdev, 0);
943                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
944                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
945         }
946 }
947 
948 static void btusb_waker(struct work_struct *work)
949 {
950         struct btusb_data *data = container_of(work, struct btusb_data, waker);
951         int err;
952 
953         err = usb_autopm_get_interface(data->intf);
954         if (err < 0)
955                 return;
956 
957         usb_autopm_put_interface(data->intf);
958 }
959 
960 static int btusb_setup_bcm92035(struct hci_dev *hdev)
961 {
962         struct sk_buff *skb;
963         u8 val = 0x00;
964 
965         BT_DBG("%s", hdev->name);
966 
967         skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
968         if (IS_ERR(skb))
969                 BT_ERR("BCM92035 command failed (%ld)", -PTR_ERR(skb));
970         else
971                 kfree_skb(skb);
972 
973         return 0;
974 }
975 
976 static int btusb_setup_csr(struct hci_dev *hdev)
977 {
978         struct hci_rp_read_local_version *rp;
979         struct sk_buff *skb;
980         int ret;
981 
982         BT_DBG("%s", hdev->name);
983 
984         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
985                              HCI_INIT_TIMEOUT);
986         if (IS_ERR(skb)) {
987                 BT_ERR("Reading local version failed (%ld)", -PTR_ERR(skb));
988                 return -PTR_ERR(skb);
989         }
990 
991         rp = (struct hci_rp_read_local_version *) skb->data;
992 
993         if (!rp->status) {
994                 if (le16_to_cpu(rp->manufacturer) != 10) {
995                         /* Clear the reset quirk since this is not an actual
996                          * early Bluetooth 1.1 device from CSR.
997                          */
998                         clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
999 
1000                         /* These fake CSR controllers have all a broken
1001                          * stored link key handling and so just disable it.
1002                          */
1003                         set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY,
1004                                 &hdev->quirks);
1005                 }
1006         }
1007 
1008         ret = -bt_to_errno(rp->status);
1009 
1010         kfree_skb(skb);
1011 
1012         return ret;
1013 }
1014 
1015 struct intel_version {
1016         u8 status;
1017         u8 hw_platform;
1018         u8 hw_variant;
1019         u8 hw_revision;
1020         u8 fw_variant;
1021         u8 fw_revision;
1022         u8 fw_build_num;
1023         u8 fw_build_ww;
1024         u8 fw_build_yy;
1025         u8 fw_patch_num;
1026 } __packed;
1027 
1028 static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
1029                                                 struct intel_version *ver)
1030 {
1031         const struct firmware *fw;
1032         char fwname[64];
1033         int ret;
1034 
1035         snprintf(fwname, sizeof(fwname),
1036                  "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
1037                  ver->hw_platform, ver->hw_variant, ver->hw_revision,
1038                  ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
1039                  ver->fw_build_ww, ver->fw_build_yy);
1040 
1041         ret = request_firmware(&fw, fwname, &hdev->dev);
1042         if (ret < 0) {
1043                 if (ret == -EINVAL) {
1044                         BT_ERR("%s Intel firmware file request failed (%d)",
1045                                hdev->name, ret);
1046                         return NULL;
1047                 }
1048 
1049                 BT_ERR("%s failed to open Intel firmware file: %s(%d)",
1050                        hdev->name, fwname, ret);
1051 
1052                 /* If the correct firmware patch file is not found, use the
1053                  * default firmware patch file instead
1054                  */
1055                 snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
1056                          ver->hw_platform, ver->hw_variant);
1057                 if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
1058                         BT_ERR("%s failed to open default Intel fw file: %s",
1059                                hdev->name, fwname);
1060                         return NULL;
1061                 }
1062         }
1063 
1064         BT_INFO("%s: Intel Bluetooth firmware file: %s", hdev->name, fwname);
1065 
1066         return fw;
1067 }
1068 
1069 static int btusb_setup_intel_patching(struct hci_dev *hdev,
1070                                       const struct firmware *fw,
1071                                       const u8 **fw_ptr, int *disable_patch)
1072 {
1073         struct sk_buff *skb;
1074         struct hci_command_hdr *cmd;
1075         const u8 *cmd_param;
1076         struct hci_event_hdr *evt = NULL;
1077         const u8 *evt_param = NULL;
1078         int remain = fw->size - (*fw_ptr - fw->data);
1079 
1080         /* The first byte indicates the types of the patch command or event.
1081          * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
1082          * in the current firmware buffer doesn't start with 0x01 or
1083          * the size of remain buffer is smaller than HCI command header,
1084          * the firmware file is corrupted and it should stop the patching
1085          * process.
1086          */
1087         if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
1088                 BT_ERR("%s Intel fw corrupted: invalid cmd read", hdev->name);
1089                 return -EINVAL;
1090         }
1091         (*fw_ptr)++;
1092         remain--;
1093 
1094         cmd = (struct hci_command_hdr *)(*fw_ptr);
1095         *fw_ptr += sizeof(*cmd);
1096         remain -= sizeof(*cmd);
1097 
1098         /* Ensure that the remain firmware data is long enough than the length
1099          * of command parameter. If not, the firmware file is corrupted.
1100          */
1101         if (remain < cmd->plen) {
1102                 BT_ERR("%s Intel fw corrupted: invalid cmd len", hdev->name);
1103                 return -EFAULT;
1104         }
1105 
1106         /* If there is a command that loads a patch in the firmware
1107          * file, then enable the patch upon success, otherwise just
1108          * disable the manufacturer mode, for example patch activation
1109          * is not required when the default firmware patch file is used
1110          * because there are no patch data to load.
1111          */
1112         if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
1113                 *disable_patch = 0;
1114 
1115         cmd_param = *fw_ptr;
1116         *fw_ptr += cmd->plen;
1117         remain -= cmd->plen;
1118 
1119         /* This reads the expected events when the above command is sent to the
1120          * device. Some vendor commands expects more than one events, for
1121          * example command status event followed by vendor specific event.
1122          * For this case, it only keeps the last expected event. so the command
1123          * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
1124          * last expected event.
1125          */
1126         while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
1127                 (*fw_ptr)++;
1128                 remain--;
1129 
1130                 evt = (struct hci_event_hdr *)(*fw_ptr);
1131                 *fw_ptr += sizeof(*evt);
1132                 remain -= sizeof(*evt);
1133 
1134                 if (remain < evt->plen) {
1135                         BT_ERR("%s Intel fw corrupted: invalid evt len",
1136                                hdev->name);
1137                         return -EFAULT;
1138                 }
1139 
1140                 evt_param = *fw_ptr;
1141                 *fw_ptr += evt->plen;
1142                 remain -= evt->plen;
1143         }
1144 
1145         /* Every HCI commands in the firmware file has its correspond event.
1146          * If event is not found or remain is smaller than zero, the firmware
1147          * file is corrupted.
1148          */
1149         if (!evt || !evt_param || remain < 0) {
1150                 BT_ERR("%s Intel fw corrupted: invalid evt read", hdev->name);
1151                 return -EFAULT;
1152         }
1153 
1154         skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
1155                                 cmd_param, evt->evt, HCI_INIT_TIMEOUT);
1156         if (IS_ERR(skb)) {
1157                 BT_ERR("%s sending Intel patch command (0x%4.4x) failed (%ld)",
1158                        hdev->name, cmd->opcode, PTR_ERR(skb));
1159                 return PTR_ERR(skb);
1160         }
1161 
1162         /* It ensures that the returned event matches the event data read from
1163          * the firmware file. At fist, it checks the length and then
1164          * the contents of the event.
1165          */
1166         if (skb->len != evt->plen) {
1167                 BT_ERR("%s mismatch event length (opcode 0x%4.4x)", hdev->name,
1168                        le16_to_cpu(cmd->opcode));
1169                 kfree_skb(skb);
1170                 return -EFAULT;
1171         }
1172 
1173         if (memcmp(skb->data, evt_param, evt->plen)) {
1174                 BT_ERR("%s mismatch event parameter (opcode 0x%4.4x)",
1175                        hdev->name, le16_to_cpu(cmd->opcode));
1176                 kfree_skb(skb);
1177                 return -EFAULT;
1178         }
1179         kfree_skb(skb);
1180 
1181         return 0;
1182 }
1183 
1184 static int btusb_setup_intel(struct hci_dev *hdev)
1185 {
1186         struct sk_buff *skb;
1187         const struct firmware *fw;
1188         const u8 *fw_ptr;
1189         int disable_patch;
1190         struct intel_version *ver;
1191 
1192         const u8 mfg_enable[] = { 0x01, 0x00 };
1193         const u8 mfg_disable[] = { 0x00, 0x00 };
1194         const u8 mfg_reset_deactivate[] = { 0x00, 0x01 };
1195         const u8 mfg_reset_activate[] = { 0x00, 0x02 };
1196 
1197         BT_DBG("%s", hdev->name);
1198 
1199         /* The controller has a bug with the first HCI command sent to it
1200          * returning number of completed commands as zero. This would stall the
1201          * command processing in the Bluetooth core.
1202          *
1203          * As a workaround, send HCI Reset command first which will reset the
1204          * number of completed commands and allow normal command processing
1205          * from now on.
1206          */
1207         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
1208         if (IS_ERR(skb)) {
1209                 BT_ERR("%s sending initial HCI reset command failed (%ld)",
1210                        hdev->name, PTR_ERR(skb));
1211                 return PTR_ERR(skb);
1212         }
1213         kfree_skb(skb);
1214 
1215         /* Read Intel specific controller version first to allow selection of
1216          * which firmware file to load.
1217          *
1218          * The returned information are hardware variant and revision plus
1219          * firmware variant, revision and build number.
1220          */
1221         skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
1222         if (IS_ERR(skb)) {
1223                 BT_ERR("%s reading Intel fw version command failed (%ld)",
1224                        hdev->name, PTR_ERR(skb));
1225                 return PTR_ERR(skb);
1226         }
1227 
1228         if (skb->len != sizeof(*ver)) {
1229                 BT_ERR("%s Intel version event length mismatch", hdev->name);
1230                 kfree_skb(skb);
1231                 return -EIO;
1232         }
1233 
1234         ver = (struct intel_version *)skb->data;
1235         if (ver->status) {
1236                 BT_ERR("%s Intel fw version event failed (%02x)", hdev->name,
1237                        ver->status);
1238                 kfree_skb(skb);
1239                 return -bt_to_errno(ver->status);
1240         }
1241 
1242         BT_INFO("%s: read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
1243                 hdev->name, ver->hw_platform, ver->hw_variant,
1244                 ver->hw_revision, ver->fw_variant,  ver->fw_revision,
1245                 ver->fw_build_num, ver->fw_build_ww, ver->fw_build_yy,
1246                 ver->fw_patch_num);
1247 
1248         /* fw_patch_num indicates the version of patch the device currently
1249          * have. If there is no patch data in the device, it is always 0x00.
1250          * So, if it is other than 0x00, no need to patch the deivce again.
1251          */
1252         if (ver->fw_patch_num) {
1253                 BT_INFO("%s: Intel device is already patched. patch num: %02x",
1254                         hdev->name, ver->fw_patch_num);
1255                 kfree_skb(skb);
1256                 return 0;
1257         }
1258 
1259         /* Opens the firmware patch file based on the firmware version read
1260          * from the controller. If it fails to open the matching firmware
1261          * patch file, it tries to open the default firmware patch file.
1262          * If no patch file is found, allow the device to operate without
1263          * a patch.
1264          */
1265         fw = btusb_setup_intel_get_fw(hdev, ver);
1266         if (!fw) {
1267                 kfree_skb(skb);
1268                 return 0;
1269         }
1270         fw_ptr = fw->data;
1271 
1272         /* This Intel specific command enables the manufacturer mode of the
1273          * controller.
1274          *
1275          * Only while this mode is enabled, the driver can download the
1276          * firmware patch data and configuration parameters.
1277          */
1278         skb = __hci_cmd_sync(hdev, 0xfc11, 2, mfg_enable, HCI_INIT_TIMEOUT);
1279         if (IS_ERR(skb)) {
1280                 BT_ERR("%s entering Intel manufacturer mode failed (%ld)",
1281                        hdev->name, PTR_ERR(skb));
1282                 release_firmware(fw);
1283                 return PTR_ERR(skb);
1284         }
1285 
1286         if (skb->data[0]) {
1287                 u8 evt_status = skb->data[0];
1288                 BT_ERR("%s enable Intel manufacturer mode event failed (%02x)",
1289                        hdev->name, evt_status);
1290                 kfree_skb(skb);
1291                 release_firmware(fw);
1292                 return -bt_to_errno(evt_status);
1293         }
1294         kfree_skb(skb);
1295 
1296         disable_patch = 1;
1297 
1298         /* The firmware data file consists of list of Intel specific HCI
1299          * commands and its expected events. The first byte indicates the
1300          * type of the message, either HCI command or HCI event.
1301          *
1302          * It reads the command and its expected event from the firmware file,
1303          * and send to the controller. Once __hci_cmd_sync_ev() returns,
1304          * the returned event is compared with the event read from the firmware
1305          * file and it will continue until all the messages are downloaded to
1306          * the controller.
1307          *
1308          * Once the firmware patching is completed successfully,
1309          * the manufacturer mode is disabled with reset and activating the
1310          * downloaded patch.
1311          *
1312          * If the firmware patching fails, the manufacturer mode is
1313          * disabled with reset and deactivating the patch.
1314          *
1315          * If the default patch file is used, no reset is done when disabling
1316          * the manufacturer.
1317          */
1318         while (fw->size > fw_ptr - fw->data) {
1319                 int ret;
1320 
1321                 ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
1322                                                  &disable_patch);
1323                 if (ret < 0)
1324                         goto exit_mfg_deactivate;
1325         }
1326 
1327         release_firmware(fw);
1328 
1329         if (disable_patch)
1330                 goto exit_mfg_disable;
1331 
1332         /* Patching completed successfully and disable the manufacturer mode
1333          * with reset and activate the downloaded firmware patches.
1334          */
1335         skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_activate),
1336                              mfg_reset_activate, HCI_INIT_TIMEOUT);
1337         if (IS_ERR(skb)) {
1338                 BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1339                        hdev->name, PTR_ERR(skb));
1340                 return PTR_ERR(skb);
1341         }
1342         kfree_skb(skb);
1343 
1344         BT_INFO("%s: Intel Bluetooth firmware patch completed and activated",
1345                 hdev->name);
1346 
1347         return 0;
1348 
1349 exit_mfg_disable:
1350         /* Disable the manufacturer mode without reset */
1351         skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_disable), mfg_disable,
1352                              HCI_INIT_TIMEOUT);
1353         if (IS_ERR(skb)) {
1354                 BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1355                        hdev->name, PTR_ERR(skb));
1356                 return PTR_ERR(skb);
1357         }
1358         kfree_skb(skb);
1359 
1360         BT_INFO("%s: Intel Bluetooth firmware patch completed", hdev->name);
1361         return 0;
1362 
1363 exit_mfg_deactivate:
1364         release_firmware(fw);
1365 
1366         /* Patching failed. Disable the manufacturer mode with reset and
1367          * deactivate the downloaded firmware patches.
1368          */
1369         skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_deactivate),
1370                              mfg_reset_deactivate, HCI_INIT_TIMEOUT);
1371         if (IS_ERR(skb)) {
1372                 BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1373                        hdev->name, PTR_ERR(skb));
1374                 return PTR_ERR(skb);
1375         }
1376         kfree_skb(skb);
1377 
1378         BT_INFO("%s: Intel Bluetooth firmware patch completed and deactivated",
1379                 hdev->name);
1380 
1381         return 0;
1382 }
1383 
1384 static int btusb_probe(struct usb_interface *intf,
1385                                 const struct usb_device_id *id)
1386 {
1387         struct usb_endpoint_descriptor *ep_desc;
1388         struct btusb_data *data;
1389         struct hci_dev *hdev;
1390         int i, err;
1391 
1392         BT_DBG("intf %p id %p", intf, id);
1393 
1394         /* interface numbers are hardcoded in the spec */
1395         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
1396                 return -ENODEV;
1397 
1398         if (!id->driver_info) {
1399                 const struct usb_device_id *match;
1400                 match = usb_match_id(intf, blacklist_table);
1401                 if (match)
1402                         id = match;
1403         }
1404 
1405         if (id->driver_info == BTUSB_IGNORE)
1406                 return -ENODEV;
1407 
1408         if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
1409                 return -ENODEV;
1410 
1411         if (ignore_csr && id->driver_info & BTUSB_CSR)
1412                 return -ENODEV;
1413 
1414         if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
1415                 return -ENODEV;
1416 
1417         if (id->driver_info & BTUSB_ATH3012) {
1418                 struct usb_device *udev = interface_to_usbdev(intf);
1419 
1420                 /* Old firmware would otherwise let ath3k driver load
1421                  * patch and sysconfig files */
1422                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
1423                         return -ENODEV;
1424         }
1425 
1426         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
1427         if (!data)
1428                 return -ENOMEM;
1429 
1430         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1431                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1432 
1433                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
1434                         data->intr_ep = ep_desc;
1435                         continue;
1436                 }
1437 
1438                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
1439                         data->bulk_tx_ep = ep_desc;
1440                         continue;
1441                 }
1442 
1443                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
1444                         data->bulk_rx_ep = ep_desc;
1445                         continue;
1446                 }
1447         }
1448 
1449         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
1450                 return -ENODEV;
1451 
1452         data->cmdreq_type = USB_TYPE_CLASS;
1453 
1454         data->udev = interface_to_usbdev(intf);
1455         data->intf = intf;
1456 
1457         spin_lock_init(&data->lock);
1458 
1459         INIT_WORK(&data->work, btusb_work);
1460         INIT_WORK(&data->waker, btusb_waker);
1461         spin_lock_init(&data->txlock);
1462 
1463         init_usb_anchor(&data->tx_anchor);
1464         init_usb_anchor(&data->intr_anchor);
1465         init_usb_anchor(&data->bulk_anchor);
1466         init_usb_anchor(&data->isoc_anchor);
1467         init_usb_anchor(&data->deferred);
1468 
1469         hdev = hci_alloc_dev();
1470         if (!hdev)
1471                 return -ENOMEM;
1472 
1473         hdev->bus = HCI_USB;
1474         hci_set_drvdata(hdev, data);
1475 
1476         data->hdev = hdev;
1477 
1478         SET_HCIDEV_DEV(hdev, &intf->dev);
1479 
1480         hdev->open   = btusb_open;
1481         hdev->close  = btusb_close;
1482         hdev->flush  = btusb_flush;
1483         hdev->send   = btusb_send_frame;
1484         hdev->notify = btusb_notify;
1485 
1486         if (id->driver_info & BTUSB_BCM92035)
1487                 hdev->setup = btusb_setup_bcm92035;
1488 
1489         if (id->driver_info & BTUSB_INTEL)
1490                 hdev->setup = btusb_setup_intel;
1491 
1492         /* Interface numbers are hardcoded in the specification */
1493         data->isoc = usb_ifnum_to_if(data->udev, 1);
1494 
1495         if (!reset)
1496                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1497 
1498         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
1499                 if (!disable_scofix)
1500                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
1501         }
1502 
1503         if (id->driver_info & BTUSB_BROKEN_ISOC)
1504                 data->isoc = NULL;
1505 
1506         if (id->driver_info & BTUSB_DIGIANSWER) {
1507                 data->cmdreq_type = USB_TYPE_VENDOR;
1508                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1509         }
1510 
1511         if (id->driver_info & BTUSB_CSR) {
1512                 struct usb_device *udev = data->udev;
1513                 u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
1514 
1515                 /* Old firmware would otherwise execute USB reset */
1516                 if (bcdDevice < 0x117)
1517                         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1518 
1519                 /* Fake CSR devices with broken commands */
1520                 if (bcdDevice <= 0x100)
1521                         hdev->setup = btusb_setup_csr;
1522         }
1523 
1524         if (id->driver_info & BTUSB_SNIFFER) {
1525                 struct usb_device *udev = data->udev;
1526 
1527                 /* New sniffer firmware has crippled HCI interface */
1528                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
1529                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1530 
1531                 data->isoc = NULL;
1532         }
1533 
1534         if (data->isoc) {
1535                 err = usb_driver_claim_interface(&btusb_driver,
1536                                                         data->isoc, data);
1537                 if (err < 0) {
1538                         hci_free_dev(hdev);
1539                         return err;
1540                 }
1541         }
1542 
1543         err = hci_register_dev(hdev);
1544         if (err < 0) {
1545                 hci_free_dev(hdev);
1546                 return err;
1547         }
1548 
1549         usb_set_intfdata(intf, data);
1550 
1551         return 0;
1552 }
1553 
1554 static void btusb_disconnect(struct usb_interface *intf)
1555 {
1556         struct btusb_data *data = usb_get_intfdata(intf);
1557         struct hci_dev *hdev;
1558 
1559         BT_DBG("intf %p", intf);
1560 
1561         if (!data)
1562                 return;
1563 
1564         hdev = data->hdev;
1565         usb_set_intfdata(data->intf, NULL);
1566 
1567         if (data->isoc)
1568                 usb_set_intfdata(data->isoc, NULL);
1569 
1570         hci_unregister_dev(hdev);
1571 
1572         if (intf == data->isoc)
1573                 usb_driver_release_interface(&btusb_driver, data->intf);
1574         else if (data->isoc)
1575                 usb_driver_release_interface(&btusb_driver, data->isoc);
1576 
1577         hci_free_dev(hdev);
1578 }
1579 
1580 #ifdef CONFIG_PM
1581 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
1582 {
1583         struct btusb_data *data = usb_get_intfdata(intf);
1584 
1585         BT_DBG("intf %p", intf);
1586 
1587         if (data->suspend_count++)
1588                 return 0;
1589 
1590         spin_lock_irq(&data->txlock);
1591         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
1592                 set_bit(BTUSB_SUSPENDING, &data->flags);
1593                 spin_unlock_irq(&data->txlock);
1594         } else {
1595                 spin_unlock_irq(&data->txlock);
1596                 data->suspend_count--;
1597                 return -EBUSY;
1598         }
1599 
1600         cancel_work_sync(&data->work);
1601 
1602         btusb_stop_traffic(data);
1603         usb_kill_anchored_urbs(&data->tx_anchor);
1604 
1605         return 0;
1606 }
1607 
1608 static void play_deferred(struct btusb_data *data)
1609 {
1610         struct urb *urb;
1611         int err;
1612 
1613         while ((urb = usb_get_from_anchor(&data->deferred))) {
1614                 err = usb_submit_urb(urb, GFP_ATOMIC);
1615                 if (err < 0)
1616                         break;
1617 
1618                 data->tx_in_flight++;
1619         }
1620         usb_scuttle_anchored_urbs(&data->deferred);
1621 }
1622 
1623 static int btusb_resume(struct usb_interface *intf)
1624 {
1625         struct btusb_data *data = usb_get_intfdata(intf);
1626         struct hci_dev *hdev = data->hdev;
1627         int err = 0;
1628 
1629         BT_DBG("intf %p", intf);
1630 
1631         if (--data->suspend_count)
1632                 return 0;
1633 
1634         if (!test_bit(HCI_RUNNING, &hdev->flags))
1635                 goto done;
1636 
1637         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
1638                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
1639                 if (err < 0) {
1640                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1641                         goto failed;
1642                 }
1643         }
1644 
1645         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
1646                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
1647                 if (err < 0) {
1648                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1649                         goto failed;
1650                 }
1651 
1652                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
1653         }
1654 
1655         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1656                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
1657                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1658                 else
1659                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
1660         }
1661 
1662         spin_lock_irq(&data->txlock);
1663         play_deferred(data);
1664         clear_bit(BTUSB_SUSPENDING, &data->flags);
1665         spin_unlock_irq(&data->txlock);
1666         schedule_work(&data->work);
1667 
1668         return 0;
1669 
1670 failed:
1671         usb_scuttle_anchored_urbs(&data->deferred);
1672 done:
1673         spin_lock_irq(&data->txlock);
1674         clear_bit(BTUSB_SUSPENDING, &data->flags);
1675         spin_unlock_irq(&data->txlock);
1676 
1677         return err;
1678 }
1679 #endif
1680 
1681 static struct usb_driver btusb_driver = {
1682         .name           = "btusb",
1683         .probe          = btusb_probe,
1684         .disconnect     = btusb_disconnect,
1685 #ifdef CONFIG_PM
1686         .suspend        = btusb_suspend,
1687         .resume         = btusb_resume,
1688 #endif
1689         .id_table       = btusb_table,
1690         .supports_autosuspend = 1,
1691         .disable_hub_initiated_lpm = 1,
1692 };
1693 
1694 module_usb_driver(btusb_driver);
1695 
1696 module_param(ignore_dga, bool, 0644);
1697 MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
1698 
1699 module_param(ignore_csr, bool, 0644);
1700 MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
1701 
1702 module_param(ignore_sniffer, bool, 0644);
1703 MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
1704 
1705 module_param(disable_scofix, bool, 0644);
1706 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
1707 
1708 module_param(force_scofix, bool, 0644);
1709 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
1710 
1711 module_param(reset, bool, 0644);
1712 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
1713 
1714 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1715 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
1716 MODULE_VERSION(VERSION);
1717 MODULE_LICENSE("GPL");
1718 

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