Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0

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 "0.7"
 32 
 33 static bool disable_scofix;
 34 static bool force_scofix;
 35 
 36 static bool reset = 1;
 37 
 38 static struct usb_driver btusb_driver;
 39 
 40 #define BTUSB_IGNORE            0x01
 41 #define BTUSB_DIGIANSWER        0x02
 42 #define BTUSB_CSR               0x04
 43 #define BTUSB_SNIFFER           0x08
 44 #define BTUSB_BCM92035          0x10
 45 #define BTUSB_BROKEN_ISOC       0x20
 46 #define BTUSB_WRONG_SCO_MTU     0x40
 47 #define BTUSB_ATH3012           0x80
 48 #define BTUSB_INTEL             0x100
 49 #define BTUSB_INTEL_BOOT        0x200
 50 #define BTUSB_BCM_PATCHRAM      0x400
 51 #define BTUSB_MARVELL           0x800
 52 #define BTUSB_SWAVE             0x1000
 53 #define BTUSB_INTEL_NEW         0x2000
 54 #define BTUSB_AMP               0x4000
 55 
 56 static const struct usb_device_id btusb_table[] = {
 57         /* Generic Bluetooth USB device */
 58         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
 59 
 60         /* Generic Bluetooth AMP device */
 61         { USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
 62 
 63         /* Apple-specific (Broadcom) devices */
 64         { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01) },
 65 
 66         /* MediaTek MT76x0E */
 67         { USB_DEVICE(0x0e8d, 0x763f) },
 68 
 69         /* Broadcom SoftSailing reporting vendor specific */
 70         { USB_DEVICE(0x0a5c, 0x21e1) },
 71 
 72         /* Apple MacBookPro 7,1 */
 73         { USB_DEVICE(0x05ac, 0x8213) },
 74 
 75         /* Apple iMac11,1 */
 76         { USB_DEVICE(0x05ac, 0x8215) },
 77 
 78         /* Apple MacBookPro6,2 */
 79         { USB_DEVICE(0x05ac, 0x8218) },
 80 
 81         /* Apple MacBookAir3,1, MacBookAir3,2 */
 82         { USB_DEVICE(0x05ac, 0x821b) },
 83 
 84         /* Apple MacBookAir4,1 */
 85         { USB_DEVICE(0x05ac, 0x821f) },
 86 
 87         /* Apple MacBookPro8,2 */
 88         { USB_DEVICE(0x05ac, 0x821a) },
 89 
 90         /* Apple MacMini5,1 */
 91         { USB_DEVICE(0x05ac, 0x8281) },
 92 
 93         /* AVM BlueFRITZ! USB v2.0 */
 94         { USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },
 95 
 96         /* Bluetooth Ultraport Module from IBM */
 97         { USB_DEVICE(0x04bf, 0x030a) },
 98 
 99         /* ALPS Modules with non-standard id */
100         { USB_DEVICE(0x044e, 0x3001) },
101         { USB_DEVICE(0x044e, 0x3002) },
102 
103         /* Ericsson with non-standard id */
104         { USB_DEVICE(0x0bdb, 0x1002) },
105 
106         /* Canyon CN-BTU1 with HID interfaces */
107         { USB_DEVICE(0x0c10, 0x0000) },
108 
109         /* Broadcom BCM20702A0 */
110         { USB_DEVICE(0x0489, 0xe042) },
111         { USB_DEVICE(0x04ca, 0x2003) },
112         { USB_DEVICE(0x0b05, 0x17b5) },
113         { USB_DEVICE(0x0b05, 0x17cb) },
114         { USB_DEVICE(0x413c, 0x8197) },
115         { USB_DEVICE(0x13d3, 0x3404),
116           .driver_info = BTUSB_BCM_PATCHRAM },
117 
118         /* Broadcom BCM20702B0 (Dynex/Insignia) */
119         { USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
120 
121         /* Foxconn - Hon Hai */
122         { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
123           .driver_info = BTUSB_BCM_PATCHRAM },
124 
125         /* Lite-On Technology - Broadcom based */
126         { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
127           .driver_info = BTUSB_BCM_PATCHRAM },
128 
129         /* Broadcom devices with vendor specific id */
130         { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
131           .driver_info = BTUSB_BCM_PATCHRAM },
132 
133         /* ASUSTek Computer - Broadcom based */
134         { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
135           .driver_info = BTUSB_BCM_PATCHRAM },
136 
137         /* Belkin F8065bf - Broadcom based */
138         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01) },
139 
140         /* IMC Networks - Broadcom based */
141         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01) },
142 
143         /* Intel Bluetooth USB Bootloader (RAM module) */
144         { USB_DEVICE(0x8087, 0x0a5a),
145           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
146 
147         { }     /* Terminating entry */
148 };
149 
150 MODULE_DEVICE_TABLE(usb, btusb_table);
151 
152 static const struct usb_device_id blacklist_table[] = {
153         /* CSR BlueCore devices */
154         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
155 
156         /* Broadcom BCM2033 without firmware */
157         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
158 
159         /* Atheros 3011 with sflash firmware */
160         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
161         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
162         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
163         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
164         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
165         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
166 
167         /* Atheros AR9285 Malbec with sflash firmware */
168         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
169 
170         /* Atheros 3012 with sflash firmware */
171         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
172         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
173         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
174         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
175         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
176         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
177         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
178         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
179         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
180         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
181         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
182         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
183         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
184         { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
185         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
186         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
187         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
188         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
189         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
190         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
191         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
192         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
193         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
194         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
195         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
196         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
197         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
198         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
199         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
200         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
201         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
202         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
203         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
204         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
205         { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
206         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
207 
208         /* Atheros AR5BBU12 with sflash firmware */
209         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
210 
211         /* Atheros AR5BBU12 with sflash firmware */
212         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
213         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
214 
215         /* Broadcom BCM2035 */
216         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
217         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
218         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
219 
220         /* Broadcom BCM2045 */
221         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
222         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
223 
224         /* IBM/Lenovo ThinkPad with Broadcom chip */
225         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
226         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
227 
228         /* HP laptop with Broadcom chip */
229         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
230 
231         /* Dell laptop with Broadcom chip */
232         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
233 
234         /* Dell Wireless 370 and 410 devices */
235         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
236         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
237 
238         /* Belkin F8T012 and F8T013 devices */
239         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
240         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
241 
242         /* Asus WL-BTD202 device */
243         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
244 
245         /* Kensington Bluetooth USB adapter */
246         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
247 
248         /* RTX Telecom based adapters with buggy SCO support */
249         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
250         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
251 
252         /* CONWISE Technology based adapters with buggy SCO support */
253         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
254 
255         /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
256         { USB_DEVICE(0x1300, 0x0001), .driver_info = BTUSB_SWAVE },
257 
258         /* Digianswer devices */
259         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
260         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
261 
262         /* CSR BlueCore Bluetooth Sniffer */
263         { USB_DEVICE(0x0a12, 0x0002),
264           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
265 
266         /* Frontline ComProbe Bluetooth Sniffer */
267         { USB_DEVICE(0x16d3, 0x0002),
268           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
269 
270         /* Marvell Bluetooth devices */
271         { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
272         { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
273 
274         /* Intel Bluetooth devices */
275         { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
276         { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
277         { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },
278         { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_NEW },
279 
280         /* Other Intel Bluetooth devices */
281         { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
282           .driver_info = BTUSB_IGNORE },
283 
284         { }     /* Terminating entry */
285 };
286 
287 #define BTUSB_MAX_ISOC_FRAMES   10
288 
289 #define BTUSB_INTR_RUNNING      0
290 #define BTUSB_BULK_RUNNING      1
291 #define BTUSB_ISOC_RUNNING      2
292 #define BTUSB_SUSPENDING        3
293 #define BTUSB_DID_ISO_RESUME    4
294 #define BTUSB_BOOTLOADER        5
295 #define BTUSB_DOWNLOADING       6
296 #define BTUSB_FIRMWARE_LOADED   7
297 #define BTUSB_FIRMWARE_FAILED   8
298 #define BTUSB_BOOTING           9
299 
300 struct btusb_data {
301         struct hci_dev       *hdev;
302         struct usb_device    *udev;
303         struct usb_interface *intf;
304         struct usb_interface *isoc;
305 
306         unsigned long flags;
307 
308         struct work_struct work;
309         struct work_struct waker;
310 
311         struct usb_anchor deferred;
312         struct usb_anchor tx_anchor;
313         int tx_in_flight;
314         spinlock_t txlock;
315 
316         struct usb_anchor intr_anchor;
317         struct usb_anchor bulk_anchor;
318         struct usb_anchor isoc_anchor;
319         spinlock_t rxlock;
320 
321         struct sk_buff *evt_skb;
322         struct sk_buff *acl_skb;
323         struct sk_buff *sco_skb;
324 
325         struct usb_endpoint_descriptor *intr_ep;
326         struct usb_endpoint_descriptor *bulk_tx_ep;
327         struct usb_endpoint_descriptor *bulk_rx_ep;
328         struct usb_endpoint_descriptor *isoc_tx_ep;
329         struct usb_endpoint_descriptor *isoc_rx_ep;
330 
331         __u8 cmdreq_type;
332         __u8 cmdreq;
333 
334         unsigned int sco_num;
335         int isoc_altsetting;
336         int suspend_count;
337 
338         int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
339         int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
340 };
341 
342 static int btusb_wait_on_bit_timeout(void *word, int bit, unsigned long timeout,
343                                      unsigned mode)
344 {
345         might_sleep();
346         if (!test_bit(bit, word))
347                 return 0;
348         return out_of_line_wait_on_bit_timeout(word, bit, bit_wait_timeout,
349                                                mode, timeout);
350 }
351 
352 static inline void btusb_free_frags(struct btusb_data *data)
353 {
354         unsigned long flags;
355 
356         spin_lock_irqsave(&data->rxlock, flags);
357 
358         kfree_skb(data->evt_skb);
359         data->evt_skb = NULL;
360 
361         kfree_skb(data->acl_skb);
362         data->acl_skb = NULL;
363 
364         kfree_skb(data->sco_skb);
365         data->sco_skb = NULL;
366 
367         spin_unlock_irqrestore(&data->rxlock, flags);
368 }
369 
370 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
371 {
372         struct sk_buff *skb;
373         int err = 0;
374 
375         spin_lock(&data->rxlock);
376         skb = data->evt_skb;
377 
378         while (count) {
379                 int len;
380 
381                 if (!skb) {
382                         skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
383                         if (!skb) {
384                                 err = -ENOMEM;
385                                 break;
386                         }
387 
388                         bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
389                         bt_cb(skb)->expect = HCI_EVENT_HDR_SIZE;
390                 }
391 
392                 len = min_t(uint, bt_cb(skb)->expect, count);
393                 memcpy(skb_put(skb, len), buffer, len);
394 
395                 count -= len;
396                 buffer += len;
397                 bt_cb(skb)->expect -= len;
398 
399                 if (skb->len == HCI_EVENT_HDR_SIZE) {
400                         /* Complete event header */
401                         bt_cb(skb)->expect = hci_event_hdr(skb)->plen;
402 
403                         if (skb_tailroom(skb) < bt_cb(skb)->expect) {
404                                 kfree_skb(skb);
405                                 skb = NULL;
406 
407                                 err = -EILSEQ;
408                                 break;
409                         }
410                 }
411 
412                 if (bt_cb(skb)->expect == 0) {
413                         /* Complete frame */
414                         data->recv_event(data->hdev, skb);
415                         skb = NULL;
416                 }
417         }
418 
419         data->evt_skb = skb;
420         spin_unlock(&data->rxlock);
421 
422         return err;
423 }
424 
425 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
426 {
427         struct sk_buff *skb;
428         int err = 0;
429 
430         spin_lock(&data->rxlock);
431         skb = data->acl_skb;
432 
433         while (count) {
434                 int len;
435 
436                 if (!skb) {
437                         skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
438                         if (!skb) {
439                                 err = -ENOMEM;
440                                 break;
441                         }
442 
443                         bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
444                         bt_cb(skb)->expect = HCI_ACL_HDR_SIZE;
445                 }
446 
447                 len = min_t(uint, bt_cb(skb)->expect, count);
448                 memcpy(skb_put(skb, len), buffer, len);
449 
450                 count -= len;
451                 buffer += len;
452                 bt_cb(skb)->expect -= len;
453 
454                 if (skb->len == HCI_ACL_HDR_SIZE) {
455                         __le16 dlen = hci_acl_hdr(skb)->dlen;
456 
457                         /* Complete ACL header */
458                         bt_cb(skb)->expect = __le16_to_cpu(dlen);
459 
460                         if (skb_tailroom(skb) < bt_cb(skb)->expect) {
461                                 kfree_skb(skb);
462                                 skb = NULL;
463 
464                                 err = -EILSEQ;
465                                 break;
466                         }
467                 }
468 
469                 if (bt_cb(skb)->expect == 0) {
470                         /* Complete frame */
471                         hci_recv_frame(data->hdev, skb);
472                         skb = NULL;
473                 }
474         }
475 
476         data->acl_skb = skb;
477         spin_unlock(&data->rxlock);
478 
479         return err;
480 }
481 
482 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
483 {
484         struct sk_buff *skb;
485         int err = 0;
486 
487         spin_lock(&data->rxlock);
488         skb = data->sco_skb;
489 
490         while (count) {
491                 int len;
492 
493                 if (!skb) {
494                         skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
495                         if (!skb) {
496                                 err = -ENOMEM;
497                                 break;
498                         }
499 
500                         bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
501                         bt_cb(skb)->expect = HCI_SCO_HDR_SIZE;
502                 }
503 
504                 len = min_t(uint, bt_cb(skb)->expect, count);
505                 memcpy(skb_put(skb, len), buffer, len);
506 
507                 count -= len;
508                 buffer += len;
509                 bt_cb(skb)->expect -= len;
510 
511                 if (skb->len == HCI_SCO_HDR_SIZE) {
512                         /* Complete SCO header */
513                         bt_cb(skb)->expect = hci_sco_hdr(skb)->dlen;
514 
515                         if (skb_tailroom(skb) < bt_cb(skb)->expect) {
516                                 kfree_skb(skb);
517                                 skb = NULL;
518 
519                                 err = -EILSEQ;
520                                 break;
521                         }
522                 }
523 
524                 if (bt_cb(skb)->expect == 0) {
525                         /* Complete frame */
526                         hci_recv_frame(data->hdev, skb);
527                         skb = NULL;
528                 }
529         }
530 
531         data->sco_skb = skb;
532         spin_unlock(&data->rxlock);
533 
534         return err;
535 }
536 
537 static void btusb_intr_complete(struct urb *urb)
538 {
539         struct hci_dev *hdev = urb->context;
540         struct btusb_data *data = hci_get_drvdata(hdev);
541         int err;
542 
543         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
544                urb->actual_length);
545 
546         if (!test_bit(HCI_RUNNING, &hdev->flags))
547                 return;
548 
549         if (urb->status == 0) {
550                 hdev->stat.byte_rx += urb->actual_length;
551 
552                 if (btusb_recv_intr(data, urb->transfer_buffer,
553                                     urb->actual_length) < 0) {
554                         BT_ERR("%s corrupted event packet", hdev->name);
555                         hdev->stat.err_rx++;
556                 }
557         } else if (urb->status == -ENOENT) {
558                 /* Avoid suspend failed when usb_kill_urb */
559                 return;
560         }
561 
562         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
563                 return;
564 
565         usb_mark_last_busy(data->udev);
566         usb_anchor_urb(urb, &data->intr_anchor);
567 
568         err = usb_submit_urb(urb, GFP_ATOMIC);
569         if (err < 0) {
570                 /* -EPERM: urb is being killed;
571                  * -ENODEV: device got disconnected */
572                 if (err != -EPERM && err != -ENODEV)
573                         BT_ERR("%s urb %p failed to resubmit (%d)",
574                                hdev->name, urb, -err);
575                 usb_unanchor_urb(urb);
576         }
577 }
578 
579 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
580 {
581         struct btusb_data *data = hci_get_drvdata(hdev);
582         struct urb *urb;
583         unsigned char *buf;
584         unsigned int pipe;
585         int err, size;
586 
587         BT_DBG("%s", hdev->name);
588 
589         if (!data->intr_ep)
590                 return -ENODEV;
591 
592         urb = usb_alloc_urb(0, mem_flags);
593         if (!urb)
594                 return -ENOMEM;
595 
596         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
597 
598         buf = kmalloc(size, mem_flags);
599         if (!buf) {
600                 usb_free_urb(urb);
601                 return -ENOMEM;
602         }
603 
604         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
605 
606         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
607                          btusb_intr_complete, hdev, data->intr_ep->bInterval);
608 
609         urb->transfer_flags |= URB_FREE_BUFFER;
610 
611         usb_anchor_urb(urb, &data->intr_anchor);
612 
613         err = usb_submit_urb(urb, mem_flags);
614         if (err < 0) {
615                 if (err != -EPERM && err != -ENODEV)
616                         BT_ERR("%s urb %p submission failed (%d)",
617                                hdev->name, urb, -err);
618                 usb_unanchor_urb(urb);
619         }
620 
621         usb_free_urb(urb);
622 
623         return err;
624 }
625 
626 static void btusb_bulk_complete(struct urb *urb)
627 {
628         struct hci_dev *hdev = urb->context;
629         struct btusb_data *data = hci_get_drvdata(hdev);
630         int err;
631 
632         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
633                urb->actual_length);
634 
635         if (!test_bit(HCI_RUNNING, &hdev->flags))
636                 return;
637 
638         if (urb->status == 0) {
639                 hdev->stat.byte_rx += urb->actual_length;
640 
641                 if (data->recv_bulk(data, urb->transfer_buffer,
642                                     urb->actual_length) < 0) {
643                         BT_ERR("%s corrupted ACL packet", hdev->name);
644                         hdev->stat.err_rx++;
645                 }
646         } else if (urb->status == -ENOENT) {
647                 /* Avoid suspend failed when usb_kill_urb */
648                 return;
649         }
650 
651         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
652                 return;
653 
654         usb_anchor_urb(urb, &data->bulk_anchor);
655         usb_mark_last_busy(data->udev);
656 
657         err = usb_submit_urb(urb, GFP_ATOMIC);
658         if (err < 0) {
659                 /* -EPERM: urb is being killed;
660                  * -ENODEV: device got disconnected */
661                 if (err != -EPERM && err != -ENODEV)
662                         BT_ERR("%s urb %p failed to resubmit (%d)",
663                                hdev->name, urb, -err);
664                 usb_unanchor_urb(urb);
665         }
666 }
667 
668 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
669 {
670         struct btusb_data *data = hci_get_drvdata(hdev);
671         struct urb *urb;
672         unsigned char *buf;
673         unsigned int pipe;
674         int err, size = HCI_MAX_FRAME_SIZE;
675 
676         BT_DBG("%s", hdev->name);
677 
678         if (!data->bulk_rx_ep)
679                 return -ENODEV;
680 
681         urb = usb_alloc_urb(0, mem_flags);
682         if (!urb)
683                 return -ENOMEM;
684 
685         buf = kmalloc(size, mem_flags);
686         if (!buf) {
687                 usb_free_urb(urb);
688                 return -ENOMEM;
689         }
690 
691         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
692 
693         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
694                           btusb_bulk_complete, hdev);
695 
696         urb->transfer_flags |= URB_FREE_BUFFER;
697 
698         usb_mark_last_busy(data->udev);
699         usb_anchor_urb(urb, &data->bulk_anchor);
700 
701         err = usb_submit_urb(urb, mem_flags);
702         if (err < 0) {
703                 if (err != -EPERM && err != -ENODEV)
704                         BT_ERR("%s urb %p submission failed (%d)",
705                                hdev->name, urb, -err);
706                 usb_unanchor_urb(urb);
707         }
708 
709         usb_free_urb(urb);
710 
711         return err;
712 }
713 
714 static void btusb_isoc_complete(struct urb *urb)
715 {
716         struct hci_dev *hdev = urb->context;
717         struct btusb_data *data = hci_get_drvdata(hdev);
718         int i, err;
719 
720         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
721                urb->actual_length);
722 
723         if (!test_bit(HCI_RUNNING, &hdev->flags))
724                 return;
725 
726         if (urb->status == 0) {
727                 for (i = 0; i < urb->number_of_packets; i++) {
728                         unsigned int offset = urb->iso_frame_desc[i].offset;
729                         unsigned int length = urb->iso_frame_desc[i].actual_length;
730 
731                         if (urb->iso_frame_desc[i].status)
732                                 continue;
733 
734                         hdev->stat.byte_rx += length;
735 
736                         if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
737                                             length) < 0) {
738                                 BT_ERR("%s corrupted SCO packet", hdev->name);
739                                 hdev->stat.err_rx++;
740                         }
741                 }
742         } else if (urb->status == -ENOENT) {
743                 /* Avoid suspend failed when usb_kill_urb */
744                 return;
745         }
746 
747         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
748                 return;
749 
750         usb_anchor_urb(urb, &data->isoc_anchor);
751 
752         err = usb_submit_urb(urb, GFP_ATOMIC);
753         if (err < 0) {
754                 /* -EPERM: urb is being killed;
755                  * -ENODEV: device got disconnected */
756                 if (err != -EPERM && err != -ENODEV)
757                         BT_ERR("%s urb %p failed to resubmit (%d)",
758                                hdev->name, urb, -err);
759                 usb_unanchor_urb(urb);
760         }
761 }
762 
763 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
764 {
765         int i, offset = 0;
766 
767         BT_DBG("len %d mtu %d", len, mtu);
768 
769         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
770                                         i++, offset += mtu, len -= mtu) {
771                 urb->iso_frame_desc[i].offset = offset;
772                 urb->iso_frame_desc[i].length = mtu;
773         }
774 
775         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
776                 urb->iso_frame_desc[i].offset = offset;
777                 urb->iso_frame_desc[i].length = len;
778                 i++;
779         }
780 
781         urb->number_of_packets = i;
782 }
783 
784 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
785 {
786         struct btusb_data *data = hci_get_drvdata(hdev);
787         struct urb *urb;
788         unsigned char *buf;
789         unsigned int pipe;
790         int err, size;
791 
792         BT_DBG("%s", hdev->name);
793 
794         if (!data->isoc_rx_ep)
795                 return -ENODEV;
796 
797         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
798         if (!urb)
799                 return -ENOMEM;
800 
801         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
802                                                 BTUSB_MAX_ISOC_FRAMES;
803 
804         buf = kmalloc(size, mem_flags);
805         if (!buf) {
806                 usb_free_urb(urb);
807                 return -ENOMEM;
808         }
809 
810         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
811 
812         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
813                          hdev, data->isoc_rx_ep->bInterval);
814 
815         urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
816 
817         __fill_isoc_descriptor(urb, size,
818                                le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
819 
820         usb_anchor_urb(urb, &data->isoc_anchor);
821 
822         err = usb_submit_urb(urb, mem_flags);
823         if (err < 0) {
824                 if (err != -EPERM && err != -ENODEV)
825                         BT_ERR("%s urb %p submission failed (%d)",
826                                hdev->name, urb, -err);
827                 usb_unanchor_urb(urb);
828         }
829 
830         usb_free_urb(urb);
831 
832         return err;
833 }
834 
835 static void btusb_tx_complete(struct urb *urb)
836 {
837         struct sk_buff *skb = urb->context;
838         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
839         struct btusb_data *data = hci_get_drvdata(hdev);
840 
841         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
842                urb->actual_length);
843 
844         if (!test_bit(HCI_RUNNING, &hdev->flags))
845                 goto done;
846 
847         if (!urb->status)
848                 hdev->stat.byte_tx += urb->transfer_buffer_length;
849         else
850                 hdev->stat.err_tx++;
851 
852 done:
853         spin_lock(&data->txlock);
854         data->tx_in_flight--;
855         spin_unlock(&data->txlock);
856 
857         kfree(urb->setup_packet);
858 
859         kfree_skb(skb);
860 }
861 
862 static void btusb_isoc_tx_complete(struct urb *urb)
863 {
864         struct sk_buff *skb = urb->context;
865         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
866 
867         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
868                urb->actual_length);
869 
870         if (!test_bit(HCI_RUNNING, &hdev->flags))
871                 goto done;
872 
873         if (!urb->status)
874                 hdev->stat.byte_tx += urb->transfer_buffer_length;
875         else
876                 hdev->stat.err_tx++;
877 
878 done:
879         kfree(urb->setup_packet);
880 
881         kfree_skb(skb);
882 }
883 
884 static int btusb_open(struct hci_dev *hdev)
885 {
886         struct btusb_data *data = hci_get_drvdata(hdev);
887         int err;
888 
889         BT_DBG("%s", hdev->name);
890 
891         err = usb_autopm_get_interface(data->intf);
892         if (err < 0)
893                 return err;
894 
895         data->intf->needs_remote_wakeup = 1;
896 
897         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
898                 goto done;
899 
900         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
901                 goto done;
902 
903         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
904         if (err < 0)
905                 goto failed;
906 
907         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
908         if (err < 0) {
909                 usb_kill_anchored_urbs(&data->intr_anchor);
910                 goto failed;
911         }
912 
913         set_bit(BTUSB_BULK_RUNNING, &data->flags);
914         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
915 
916 done:
917         usb_autopm_put_interface(data->intf);
918         return 0;
919 
920 failed:
921         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
922         clear_bit(HCI_RUNNING, &hdev->flags);
923         usb_autopm_put_interface(data->intf);
924         return err;
925 }
926 
927 static void btusb_stop_traffic(struct btusb_data *data)
928 {
929         usb_kill_anchored_urbs(&data->intr_anchor);
930         usb_kill_anchored_urbs(&data->bulk_anchor);
931         usb_kill_anchored_urbs(&data->isoc_anchor);
932 }
933 
934 static int btusb_close(struct hci_dev *hdev)
935 {
936         struct btusb_data *data = hci_get_drvdata(hdev);
937         int err;
938 
939         BT_DBG("%s", hdev->name);
940 
941         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
942                 return 0;
943 
944         cancel_work_sync(&data->work);
945         cancel_work_sync(&data->waker);
946 
947         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
948         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
949         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
950 
951         btusb_stop_traffic(data);
952         btusb_free_frags(data);
953 
954         err = usb_autopm_get_interface(data->intf);
955         if (err < 0)
956                 goto failed;
957 
958         data->intf->needs_remote_wakeup = 0;
959         usb_autopm_put_interface(data->intf);
960 
961 failed:
962         usb_scuttle_anchored_urbs(&data->deferred);
963         return 0;
964 }
965 
966 static int btusb_flush(struct hci_dev *hdev)
967 {
968         struct btusb_data *data = hci_get_drvdata(hdev);
969 
970         BT_DBG("%s", hdev->name);
971 
972         usb_kill_anchored_urbs(&data->tx_anchor);
973         btusb_free_frags(data);
974 
975         return 0;
976 }
977 
978 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
979 {
980         struct btusb_data *data = hci_get_drvdata(hdev);
981         struct usb_ctrlrequest *dr;
982         struct urb *urb;
983         unsigned int pipe;
984 
985         urb = usb_alloc_urb(0, GFP_KERNEL);
986         if (!urb)
987                 return ERR_PTR(-ENOMEM);
988 
989         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
990         if (!dr) {
991                 usb_free_urb(urb);
992                 return ERR_PTR(-ENOMEM);
993         }
994 
995         dr->bRequestType = data->cmdreq_type;
996         dr->bRequest     = data->cmdreq;
997         dr->wIndex       = 0;
998         dr->wValue       = 0;
999         dr->wLength      = __cpu_to_le16(skb->len);
1000 
1001         pipe = usb_sndctrlpipe(data->udev, 0x00);
1002 
1003         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1004                              skb->data, skb->len, btusb_tx_complete, skb);
1005 
1006         skb->dev = (void *)hdev;
1007 
1008         return urb;
1009 }
1010 
1011 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1012 {
1013         struct btusb_data *data = hci_get_drvdata(hdev);
1014         struct urb *urb;
1015         unsigned int pipe;
1016 
1017         if (!data->bulk_tx_ep)
1018                 return ERR_PTR(-ENODEV);
1019 
1020         urb = usb_alloc_urb(0, GFP_KERNEL);
1021         if (!urb)
1022                 return ERR_PTR(-ENOMEM);
1023 
1024         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1025 
1026         usb_fill_bulk_urb(urb, data->udev, pipe,
1027                           skb->data, skb->len, btusb_tx_complete, skb);
1028 
1029         skb->dev = (void *)hdev;
1030 
1031         return urb;
1032 }
1033 
1034 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1035 {
1036         struct btusb_data *data = hci_get_drvdata(hdev);
1037         struct urb *urb;
1038         unsigned int pipe;
1039 
1040         if (!data->isoc_tx_ep)
1041                 return ERR_PTR(-ENODEV);
1042 
1043         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1044         if (!urb)
1045                 return ERR_PTR(-ENOMEM);
1046 
1047         pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1048 
1049         usb_fill_int_urb(urb, data->udev, pipe,
1050                          skb->data, skb->len, btusb_isoc_tx_complete,
1051                          skb, data->isoc_tx_ep->bInterval);
1052 
1053         urb->transfer_flags  = URB_ISO_ASAP;
1054 
1055         __fill_isoc_descriptor(urb, skb->len,
1056                                le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1057 
1058         skb->dev = (void *)hdev;
1059 
1060         return urb;
1061 }
1062 
1063 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1064 {
1065         struct btusb_data *data = hci_get_drvdata(hdev);
1066         int err;
1067 
1068         usb_anchor_urb(urb, &data->tx_anchor);
1069 
1070         err = usb_submit_urb(urb, GFP_KERNEL);
1071         if (err < 0) {
1072                 if (err != -EPERM && err != -ENODEV)
1073                         BT_ERR("%s urb %p submission failed (%d)",
1074                                hdev->name, urb, -err);
1075                 kfree(urb->setup_packet);
1076                 usb_unanchor_urb(urb);
1077         } else {
1078                 usb_mark_last_busy(data->udev);
1079         }
1080 
1081         usb_free_urb(urb);
1082         return err;
1083 }
1084 
1085 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1086 {
1087         struct btusb_data *data = hci_get_drvdata(hdev);
1088         unsigned long flags;
1089         bool suspending;
1090 
1091         spin_lock_irqsave(&data->txlock, flags);
1092         suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1093         if (!suspending)
1094                 data->tx_in_flight++;
1095         spin_unlock_irqrestore(&data->txlock, flags);
1096 
1097         if (!suspending)
1098                 return submit_tx_urb(hdev, urb);
1099 
1100         usb_anchor_urb(urb, &data->deferred);
1101         schedule_work(&data->waker);
1102 
1103         usb_free_urb(urb);
1104         return 0;
1105 }
1106 
1107 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1108 {
1109         struct urb *urb;
1110 
1111         BT_DBG("%s", hdev->name);
1112 
1113         if (!test_bit(HCI_RUNNING, &hdev->flags))
1114                 return -EBUSY;
1115 
1116         switch (bt_cb(skb)->pkt_type) {
1117         case HCI_COMMAND_PKT:
1118                 urb = alloc_ctrl_urb(hdev, skb);
1119                 if (IS_ERR(urb))
1120                         return PTR_ERR(urb);
1121 
1122                 hdev->stat.cmd_tx++;
1123                 return submit_or_queue_tx_urb(hdev, urb);
1124 
1125         case HCI_ACLDATA_PKT:
1126                 urb = alloc_bulk_urb(hdev, skb);
1127                 if (IS_ERR(urb))
1128                         return PTR_ERR(urb);
1129 
1130                 hdev->stat.acl_tx++;
1131                 return submit_or_queue_tx_urb(hdev, urb);
1132 
1133         case HCI_SCODATA_PKT:
1134                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1135                         return -ENODEV;
1136 
1137                 urb = alloc_isoc_urb(hdev, skb);
1138                 if (IS_ERR(urb))
1139                         return PTR_ERR(urb);
1140 
1141                 hdev->stat.sco_tx++;
1142                 return submit_tx_urb(hdev, urb);
1143         }
1144 
1145         return -EILSEQ;
1146 }
1147 
1148 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1149 {
1150         struct btusb_data *data = hci_get_drvdata(hdev);
1151 
1152         BT_DBG("%s evt %d", hdev->name, evt);
1153 
1154         if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1155                 data->sco_num = hci_conn_num(hdev, SCO_LINK);
1156                 schedule_work(&data->work);
1157         }
1158 }
1159 
1160 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1161 {
1162         struct btusb_data *data = hci_get_drvdata(hdev);
1163         struct usb_interface *intf = data->isoc;
1164         struct usb_endpoint_descriptor *ep_desc;
1165         int i, err;
1166 
1167         if (!data->isoc)
1168                 return -ENODEV;
1169 
1170         err = usb_set_interface(data->udev, 1, altsetting);
1171         if (err < 0) {
1172                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
1173                 return err;
1174         }
1175 
1176         data->isoc_altsetting = altsetting;
1177 
1178         data->isoc_tx_ep = NULL;
1179         data->isoc_rx_ep = NULL;
1180 
1181         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1182                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1183 
1184                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1185                         data->isoc_tx_ep = ep_desc;
1186                         continue;
1187                 }
1188 
1189                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1190                         data->isoc_rx_ep = ep_desc;
1191                         continue;
1192                 }
1193         }
1194 
1195         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1196                 BT_ERR("%s invalid SCO descriptors", hdev->name);
1197                 return -ENODEV;
1198         }
1199 
1200         return 0;
1201 }
1202 
1203 static void btusb_work(struct work_struct *work)
1204 {
1205         struct btusb_data *data = container_of(work, struct btusb_data, work);
1206         struct hci_dev *hdev = data->hdev;
1207         int new_alts;
1208         int err;
1209 
1210         if (data->sco_num > 0) {
1211                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1212                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1213                         if (err < 0) {
1214                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1215                                 usb_kill_anchored_urbs(&data->isoc_anchor);
1216                                 return;
1217                         }
1218 
1219                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1220                 }
1221 
1222                 if (hdev->voice_setting & 0x0020) {
1223                         static const int alts[3] = { 2, 4, 5 };
1224 
1225                         new_alts = alts[data->sco_num - 1];
1226                 } else {
1227                         new_alts = data->sco_num;
1228                 }
1229 
1230                 if (data->isoc_altsetting != new_alts) {
1231                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1232                         usb_kill_anchored_urbs(&data->isoc_anchor);
1233 
1234                         if (__set_isoc_interface(hdev, new_alts) < 0)
1235                                 return;
1236                 }
1237 
1238                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1239                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1240                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1241                         else
1242                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1243                 }
1244         } else {
1245                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1246                 usb_kill_anchored_urbs(&data->isoc_anchor);
1247 
1248                 __set_isoc_interface(hdev, 0);
1249                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1250                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1251         }
1252 }
1253 
1254 static void btusb_waker(struct work_struct *work)
1255 {
1256         struct btusb_data *data = container_of(work, struct btusb_data, waker);
1257         int err;
1258 
1259         err = usb_autopm_get_interface(data->intf);
1260         if (err < 0)
1261                 return;
1262 
1263         usb_autopm_put_interface(data->intf);
1264 }
1265 
1266 static int btusb_setup_bcm92035(struct hci_dev *hdev)
1267 {
1268         struct sk_buff *skb;
1269         u8 val = 0x00;
1270 
1271         BT_DBG("%s", hdev->name);
1272 
1273         skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
1274         if (IS_ERR(skb))
1275                 BT_ERR("BCM92035 command failed (%ld)", -PTR_ERR(skb));
1276         else
1277                 kfree_skb(skb);
1278 
1279         return 0;
1280 }
1281 
1282 static int btusb_setup_csr(struct hci_dev *hdev)
1283 {
1284         struct hci_rp_read_local_version *rp;
1285         struct sk_buff *skb;
1286         int ret;
1287 
1288         BT_DBG("%s", hdev->name);
1289 
1290         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
1291                              HCI_INIT_TIMEOUT);
1292         if (IS_ERR(skb)) {
1293                 BT_ERR("Reading local version failed (%ld)", -PTR_ERR(skb));
1294                 return -PTR_ERR(skb);
1295         }
1296 
1297         rp = (struct hci_rp_read_local_version *)skb->data;
1298 
1299         if (!rp->status) {
1300                 if (le16_to_cpu(rp->manufacturer) != 10) {
1301                         /* Clear the reset quirk since this is not an actual
1302                          * early Bluetooth 1.1 device from CSR.
1303                          */
1304                         clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1305 
1306                         /* These fake CSR controllers have all a broken
1307                          * stored link key handling and so just disable it.
1308                          */
1309                         set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY,
1310                                 &hdev->quirks);
1311                 }
1312         }
1313 
1314         ret = -bt_to_errno(rp->status);
1315 
1316         kfree_skb(skb);
1317 
1318         return ret;
1319 }
1320 
1321 struct intel_version {
1322         u8 status;
1323         u8 hw_platform;
1324         u8 hw_variant;
1325         u8 hw_revision;
1326         u8 fw_variant;
1327         u8 fw_revision;
1328         u8 fw_build_num;
1329         u8 fw_build_ww;
1330         u8 fw_build_yy;
1331         u8 fw_patch_num;
1332 } __packed;
1333 
1334 struct intel_boot_params {
1335         __u8     status;
1336         __u8     otp_format;
1337         __u8     otp_content;
1338         __u8     otp_patch;
1339         __le16   dev_revid;
1340         __u8     secure_boot;
1341         __u8     key_from_hdr;
1342         __u8     key_type;
1343         __u8     otp_lock;
1344         __u8     api_lock;
1345         __u8     debug_lock;
1346         bdaddr_t otp_bdaddr;
1347         __u8     min_fw_build_nn;
1348         __u8     min_fw_build_cw;
1349         __u8     min_fw_build_yy;
1350         __u8     limited_cce;
1351         __u8     unlocked_state;
1352 } __packed;
1353 
1354 static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
1355                                                        struct intel_version *ver)
1356 {
1357         const struct firmware *fw;
1358         char fwname[64];
1359         int ret;
1360 
1361         snprintf(fwname, sizeof(fwname),
1362                  "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
1363                  ver->hw_platform, ver->hw_variant, ver->hw_revision,
1364                  ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
1365                  ver->fw_build_ww, ver->fw_build_yy);
1366 
1367         ret = request_firmware(&fw, fwname, &hdev->dev);
1368         if (ret < 0) {
1369                 if (ret == -EINVAL) {
1370                         BT_ERR("%s Intel firmware file request failed (%d)",
1371                                hdev->name, ret);
1372                         return NULL;
1373                 }
1374 
1375                 BT_ERR("%s failed to open Intel firmware file: %s(%d)",
1376                        hdev->name, fwname, ret);
1377 
1378                 /* If the correct firmware patch file is not found, use the
1379                  * default firmware patch file instead
1380                  */
1381                 snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
1382                          ver->hw_platform, ver->hw_variant);
1383                 if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
1384                         BT_ERR("%s failed to open default Intel fw file: %s",
1385                                hdev->name, fwname);
1386                         return NULL;
1387                 }
1388         }
1389 
1390         BT_INFO("%s: Intel Bluetooth firmware file: %s", hdev->name, fwname);
1391 
1392         return fw;
1393 }
1394 
1395 static int btusb_setup_intel_patching(struct hci_dev *hdev,
1396                                       const struct firmware *fw,
1397                                       const u8 **fw_ptr, int *disable_patch)
1398 {
1399         struct sk_buff *skb;
1400         struct hci_command_hdr *cmd;
1401         const u8 *cmd_param;
1402         struct hci_event_hdr *evt = NULL;
1403         const u8 *evt_param = NULL;
1404         int remain = fw->size - (*fw_ptr - fw->data);
1405 
1406         /* The first byte indicates the types of the patch command or event.
1407          * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
1408          * in the current firmware buffer doesn't start with 0x01 or
1409          * the size of remain buffer is smaller than HCI command header,
1410          * the firmware file is corrupted and it should stop the patching
1411          * process.
1412          */
1413         if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
1414                 BT_ERR("%s Intel fw corrupted: invalid cmd read", hdev->name);
1415                 return -EINVAL;
1416         }
1417         (*fw_ptr)++;
1418         remain--;
1419 
1420         cmd = (struct hci_command_hdr *)(*fw_ptr);
1421         *fw_ptr += sizeof(*cmd);
1422         remain -= sizeof(*cmd);
1423 
1424         /* Ensure that the remain firmware data is long enough than the length
1425          * of command parameter. If not, the firmware file is corrupted.
1426          */
1427         if (remain < cmd->plen) {
1428                 BT_ERR("%s Intel fw corrupted: invalid cmd len", hdev->name);
1429                 return -EFAULT;
1430         }
1431 
1432         /* If there is a command that loads a patch in the firmware
1433          * file, then enable the patch upon success, otherwise just
1434          * disable the manufacturer mode, for example patch activation
1435          * is not required when the default firmware patch file is used
1436          * because there are no patch data to load.
1437          */
1438         if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
1439                 *disable_patch = 0;
1440 
1441         cmd_param = *fw_ptr;
1442         *fw_ptr += cmd->plen;
1443         remain -= cmd->plen;
1444 
1445         /* This reads the expected events when the above command is sent to the
1446          * device. Some vendor commands expects more than one events, for
1447          * example command status event followed by vendor specific event.
1448          * For this case, it only keeps the last expected event. so the command
1449          * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
1450          * last expected event.
1451          */
1452         while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
1453                 (*fw_ptr)++;
1454                 remain--;
1455 
1456                 evt = (struct hci_event_hdr *)(*fw_ptr);
1457                 *fw_ptr += sizeof(*evt);
1458                 remain -= sizeof(*evt);
1459 
1460                 if (remain < evt->plen) {
1461                         BT_ERR("%s Intel fw corrupted: invalid evt len",
1462                                hdev->name);
1463                         return -EFAULT;
1464                 }
1465 
1466                 evt_param = *fw_ptr;
1467                 *fw_ptr += evt->plen;
1468                 remain -= evt->plen;
1469         }
1470 
1471         /* Every HCI commands in the firmware file has its correspond event.
1472          * If event is not found or remain is smaller than zero, the firmware
1473          * file is corrupted.
1474          */
1475         if (!evt || !evt_param || remain < 0) {
1476                 BT_ERR("%s Intel fw corrupted: invalid evt read", hdev->name);
1477                 return -EFAULT;
1478         }
1479 
1480         skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
1481                                 cmd_param, evt->evt, HCI_INIT_TIMEOUT);
1482         if (IS_ERR(skb)) {
1483                 BT_ERR("%s sending Intel patch command (0x%4.4x) failed (%ld)",
1484                        hdev->name, cmd->opcode, PTR_ERR(skb));
1485                 return PTR_ERR(skb);
1486         }
1487 
1488         /* It ensures that the returned event matches the event data read from
1489          * the firmware file. At fist, it checks the length and then
1490          * the contents of the event.
1491          */
1492         if (skb->len != evt->plen) {
1493                 BT_ERR("%s mismatch event length (opcode 0x%4.4x)", hdev->name,
1494                        le16_to_cpu(cmd->opcode));
1495                 kfree_skb(skb);
1496                 return -EFAULT;
1497         }
1498 
1499         if (memcmp(skb->data, evt_param, evt->plen)) {
1500                 BT_ERR("%s mismatch event parameter (opcode 0x%4.4x)",
1501                        hdev->name, le16_to_cpu(cmd->opcode));
1502                 kfree_skb(skb);
1503                 return -EFAULT;
1504         }
1505         kfree_skb(skb);
1506 
1507         return 0;
1508 }
1509 
1510 #define BDADDR_INTEL (&(bdaddr_t) {{0x00, 0x8b, 0x9e, 0x19, 0x03, 0x00}})
1511 
1512 static int btusb_check_bdaddr_intel(struct hci_dev *hdev)
1513 {
1514         struct sk_buff *skb;
1515         struct hci_rp_read_bd_addr *rp;
1516 
1517         skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
1518                              HCI_INIT_TIMEOUT);
1519         if (IS_ERR(skb)) {
1520                 BT_ERR("%s reading Intel device address failed (%ld)",
1521                        hdev->name, PTR_ERR(skb));
1522                 return PTR_ERR(skb);
1523         }
1524 
1525         if (skb->len != sizeof(*rp)) {
1526                 BT_ERR("%s Intel device address length mismatch", hdev->name);
1527                 kfree_skb(skb);
1528                 return -EIO;
1529         }
1530 
1531         rp = (struct hci_rp_read_bd_addr *)skb->data;
1532         if (rp->status) {
1533                 BT_ERR("%s Intel device address result failed (%02x)",
1534                        hdev->name, rp->status);
1535                 kfree_skb(skb);
1536                 return -bt_to_errno(rp->status);
1537         }
1538 
1539         /* For some Intel based controllers, the default Bluetooth device
1540          * address 00:03:19:9E:8B:00 can be found. These controllers are
1541          * fully operational, but have the danger of duplicate addresses
1542          * and that in turn can cause problems with Bluetooth operation.
1543          */
1544         if (!bacmp(&rp->bdaddr, BDADDR_INTEL)) {
1545                 BT_ERR("%s found Intel default device address (%pMR)",
1546                        hdev->name, &rp->bdaddr);
1547                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
1548         }
1549 
1550         kfree_skb(skb);
1551 
1552         return 0;
1553 }
1554 
1555 static int btusb_setup_intel(struct hci_dev *hdev)
1556 {
1557         struct sk_buff *skb;
1558         const struct firmware *fw;
1559         const u8 *fw_ptr;
1560         int disable_patch;
1561         struct intel_version *ver;
1562 
1563         const u8 mfg_enable[] = { 0x01, 0x00 };
1564         const u8 mfg_disable[] = { 0x00, 0x00 };
1565         const u8 mfg_reset_deactivate[] = { 0x00, 0x01 };
1566         const u8 mfg_reset_activate[] = { 0x00, 0x02 };
1567 
1568         BT_DBG("%s", hdev->name);
1569 
1570         /* The controller has a bug with the first HCI command sent to it
1571          * returning number of completed commands as zero. This would stall the
1572          * command processing in the Bluetooth core.
1573          *
1574          * As a workaround, send HCI Reset command first which will reset the
1575          * number of completed commands and allow normal command processing
1576          * from now on.
1577          */
1578         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
1579         if (IS_ERR(skb)) {
1580                 BT_ERR("%s sending initial HCI reset command failed (%ld)",
1581                        hdev->name, PTR_ERR(skb));
1582                 return PTR_ERR(skb);
1583         }
1584         kfree_skb(skb);
1585 
1586         /* Read Intel specific controller version first to allow selection of
1587          * which firmware file to load.
1588          *
1589          * The returned information are hardware variant and revision plus
1590          * firmware variant, revision and build number.
1591          */
1592         skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
1593         if (IS_ERR(skb)) {
1594                 BT_ERR("%s reading Intel fw version command failed (%ld)",
1595                        hdev->name, PTR_ERR(skb));
1596                 return PTR_ERR(skb);
1597         }
1598 
1599         if (skb->len != sizeof(*ver)) {
1600                 BT_ERR("%s Intel version event length mismatch", hdev->name);
1601                 kfree_skb(skb);
1602                 return -EIO;
1603         }
1604 
1605         ver = (struct intel_version *)skb->data;
1606         if (ver->status) {
1607                 BT_ERR("%s Intel fw version event failed (%02x)", hdev->name,
1608                        ver->status);
1609                 kfree_skb(skb);
1610                 return -bt_to_errno(ver->status);
1611         }
1612 
1613         BT_INFO("%s: read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
1614                 hdev->name, ver->hw_platform, ver->hw_variant,
1615                 ver->hw_revision, ver->fw_variant,  ver->fw_revision,
1616                 ver->fw_build_num, ver->fw_build_ww, ver->fw_build_yy,
1617                 ver->fw_patch_num);
1618 
1619         /* fw_patch_num indicates the version of patch the device currently
1620          * have. If there is no patch data in the device, it is always 0x00.
1621          * So, if it is other than 0x00, no need to patch the deivce again.
1622          */
1623         if (ver->fw_patch_num) {
1624                 BT_INFO("%s: Intel device is already patched. patch num: %02x",
1625                         hdev->name, ver->fw_patch_num);
1626                 kfree_skb(skb);
1627                 btusb_check_bdaddr_intel(hdev);
1628                 return 0;
1629         }
1630 
1631         /* Opens the firmware patch file based on the firmware version read
1632          * from the controller. If it fails to open the matching firmware
1633          * patch file, it tries to open the default firmware patch file.
1634          * If no patch file is found, allow the device to operate without
1635          * a patch.
1636          */
1637         fw = btusb_setup_intel_get_fw(hdev, ver);
1638         if (!fw) {
1639                 kfree_skb(skb);
1640                 btusb_check_bdaddr_intel(hdev);
1641                 return 0;
1642         }
1643         fw_ptr = fw->data;
1644 
1645         /* This Intel specific command enables the manufacturer mode of the
1646          * controller.
1647          *
1648          * Only while this mode is enabled, the driver can download the
1649          * firmware patch data and configuration parameters.
1650          */
1651         skb = __hci_cmd_sync(hdev, 0xfc11, 2, mfg_enable, HCI_INIT_TIMEOUT);
1652         if (IS_ERR(skb)) {
1653                 BT_ERR("%s entering Intel manufacturer mode failed (%ld)",
1654                        hdev->name, PTR_ERR(skb));
1655                 release_firmware(fw);
1656                 return PTR_ERR(skb);
1657         }
1658 
1659         if (skb->data[0]) {
1660                 u8 evt_status = skb->data[0];
1661 
1662                 BT_ERR("%s enable Intel manufacturer mode event failed (%02x)",
1663                        hdev->name, evt_status);
1664                 kfree_skb(skb);
1665                 release_firmware(fw);
1666                 return -bt_to_errno(evt_status);
1667         }
1668         kfree_skb(skb);
1669 
1670         disable_patch = 1;
1671 
1672         /* The firmware data file consists of list of Intel specific HCI
1673          * commands and its expected events. The first byte indicates the
1674          * type of the message, either HCI command or HCI event.
1675          *
1676          * It reads the command and its expected event from the firmware file,
1677          * and send to the controller. Once __hci_cmd_sync_ev() returns,
1678          * the returned event is compared with the event read from the firmware
1679          * file and it will continue until all the messages are downloaded to
1680          * the controller.
1681          *
1682          * Once the firmware patching is completed successfully,
1683          * the manufacturer mode is disabled with reset and activating the
1684          * downloaded patch.
1685          *
1686          * If the firmware patching fails, the manufacturer mode is
1687          * disabled with reset and deactivating the patch.
1688          *
1689          * If the default patch file is used, no reset is done when disabling
1690          * the manufacturer.
1691          */
1692         while (fw->size > fw_ptr - fw->data) {
1693                 int ret;
1694 
1695                 ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
1696                                                  &disable_patch);
1697                 if (ret < 0)
1698                         goto exit_mfg_deactivate;
1699         }
1700 
1701         release_firmware(fw);
1702 
1703         if (disable_patch)
1704                 goto exit_mfg_disable;
1705 
1706         /* Patching completed successfully and disable the manufacturer mode
1707          * with reset and activate the downloaded firmware patches.
1708          */
1709         skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_activate),
1710                              mfg_reset_activate, HCI_INIT_TIMEOUT);
1711         if (IS_ERR(skb)) {
1712                 BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1713                        hdev->name, PTR_ERR(skb));
1714                 return PTR_ERR(skb);
1715         }
1716         kfree_skb(skb);
1717 
1718         BT_INFO("%s: Intel Bluetooth firmware patch completed and activated",
1719                 hdev->name);
1720 
1721         btusb_check_bdaddr_intel(hdev);
1722         return 0;
1723 
1724 exit_mfg_disable:
1725         /* Disable the manufacturer mode without reset */
1726         skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_disable), mfg_disable,
1727                              HCI_INIT_TIMEOUT);
1728         if (IS_ERR(skb)) {
1729                 BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1730                        hdev->name, PTR_ERR(skb));
1731                 return PTR_ERR(skb);
1732         }
1733         kfree_skb(skb);
1734 
1735         BT_INFO("%s: Intel Bluetooth firmware patch completed", hdev->name);
1736 
1737         btusb_check_bdaddr_intel(hdev);
1738         return 0;
1739 
1740 exit_mfg_deactivate:
1741         release_firmware(fw);
1742 
1743         /* Patching failed. Disable the manufacturer mode with reset and
1744          * deactivate the downloaded firmware patches.
1745          */
1746         skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_deactivate),
1747                              mfg_reset_deactivate, HCI_INIT_TIMEOUT);
1748         if (IS_ERR(skb)) {
1749                 BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1750                        hdev->name, PTR_ERR(skb));
1751                 return PTR_ERR(skb);
1752         }
1753         kfree_skb(skb);
1754 
1755         BT_INFO("%s: Intel Bluetooth firmware patch completed and deactivated",
1756                 hdev->name);
1757 
1758         btusb_check_bdaddr_intel(hdev);
1759         return 0;
1760 }
1761 
1762 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
1763 {
1764         struct sk_buff *skb;
1765         struct hci_event_hdr *hdr;
1766         struct hci_ev_cmd_complete *evt;
1767 
1768         skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
1769         if (!skb)
1770                 return -ENOMEM;
1771 
1772         hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr));
1773         hdr->evt = HCI_EV_CMD_COMPLETE;
1774         hdr->plen = sizeof(*evt) + 1;
1775 
1776         evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt));
1777         evt->ncmd = 0x01;
1778         evt->opcode = cpu_to_le16(opcode);
1779 
1780         *skb_put(skb, 1) = 0x00;
1781 
1782         bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
1783 
1784         return hci_recv_frame(hdev, skb);
1785 }
1786 
1787 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
1788                                  int count)
1789 {
1790         /* When the device is in bootloader mode, then it can send
1791          * events via the bulk endpoint. These events are treated the
1792          * same way as the ones received from the interrupt endpoint.
1793          */
1794         if (test_bit(BTUSB_BOOTLOADER, &data->flags))
1795                 return btusb_recv_intr(data, buffer, count);
1796 
1797         return btusb_recv_bulk(data, buffer, count);
1798 }
1799 
1800 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
1801 {
1802         struct btusb_data *data = hci_get_drvdata(hdev);
1803 
1804         if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1805                 struct hci_event_hdr *hdr = (void *)skb->data;
1806 
1807                 /* When the firmware loading completes the device sends
1808                  * out a vendor specific event indicating the result of
1809                  * the firmware loading.
1810                  */
1811                 if (skb->len == 7 && hdr->evt == 0xff && hdr->plen == 0x05 &&
1812                     skb->data[2] == 0x06) {
1813                         if (skb->data[3] != 0x00)
1814                                 test_bit(BTUSB_FIRMWARE_FAILED, &data->flags);
1815 
1816                         if (test_and_clear_bit(BTUSB_DOWNLOADING,
1817                                                &data->flags) &&
1818                             test_bit(BTUSB_FIRMWARE_LOADED, &data->flags)) {
1819                                 smp_mb__after_atomic();
1820                                 wake_up_bit(&data->flags, BTUSB_DOWNLOADING);
1821                         }
1822                 }
1823 
1824                 /* When switching to the operational firmware the device
1825                  * sends a vendor specific event indicating that the bootup
1826                  * completed.
1827                  */
1828                 if (skb->len == 9 && hdr->evt == 0xff && hdr->plen == 0x07 &&
1829                     skb->data[2] == 0x02) {
1830                         if (test_and_clear_bit(BTUSB_BOOTING, &data->flags)) {
1831                                 smp_mb__after_atomic();
1832                                 wake_up_bit(&data->flags, BTUSB_BOOTING);
1833                         }
1834                 }
1835         }
1836 
1837         return hci_recv_frame(hdev, skb);
1838 }
1839 
1840 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
1841 {
1842         struct btusb_data *data = hci_get_drvdata(hdev);
1843         struct urb *urb;
1844 
1845         BT_DBG("%s", hdev->name);
1846 
1847         if (!test_bit(HCI_RUNNING, &hdev->flags))
1848                 return -EBUSY;
1849 
1850         switch (bt_cb(skb)->pkt_type) {
1851         case HCI_COMMAND_PKT:
1852                 if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1853                         struct hci_command_hdr *cmd = (void *)skb->data;
1854                         __u16 opcode = le16_to_cpu(cmd->opcode);
1855 
1856                         /* When in bootloader mode and the command 0xfc09
1857                          * is received, it needs to be send down the
1858                          * bulk endpoint. So allocate a bulk URB instead.
1859                          */
1860                         if (opcode == 0xfc09)
1861                                 urb = alloc_bulk_urb(hdev, skb);
1862                         else
1863                                 urb = alloc_ctrl_urb(hdev, skb);
1864 
1865                         /* When the 0xfc01 command is issued to boot into
1866                          * the operational firmware, it will actually not
1867                          * send a command complete event. To keep the flow
1868                          * control working inject that event here.
1869                          */
1870                         if (opcode == 0xfc01)
1871                                 inject_cmd_complete(hdev, opcode);
1872                 } else {
1873                         urb = alloc_ctrl_urb(hdev, skb);
1874                 }
1875                 if (IS_ERR(urb))
1876                         return PTR_ERR(urb);
1877 
1878                 hdev->stat.cmd_tx++;
1879                 return submit_or_queue_tx_urb(hdev, urb);
1880 
1881         case HCI_ACLDATA_PKT:
1882                 urb = alloc_bulk_urb(hdev, skb);
1883                 if (IS_ERR(urb))
1884                         return PTR_ERR(urb);
1885 
1886                 hdev->stat.acl_tx++;
1887                 return submit_or_queue_tx_urb(hdev, urb);
1888 
1889         case HCI_SCODATA_PKT:
1890                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1891                         return -ENODEV;
1892 
1893                 urb = alloc_isoc_urb(hdev, skb);
1894                 if (IS_ERR(urb))
1895                         return PTR_ERR(urb);
1896 
1897                 hdev->stat.sco_tx++;
1898                 return submit_tx_urb(hdev, urb);
1899         }
1900 
1901         return -EILSEQ;
1902 }
1903 
1904 static int btusb_intel_secure_send(struct hci_dev *hdev, u8 fragment_type,
1905                                    u32 plen, const void *param)
1906 {
1907         while (plen > 0) {
1908                 struct sk_buff *skb;
1909                 u8 cmd_param[253], fragment_len = (plen > 252) ? 252 : plen;
1910 
1911                 cmd_param[0] = fragment_type;
1912                 memcpy(cmd_param + 1, param, fragment_len);
1913 
1914                 skb = __hci_cmd_sync(hdev, 0xfc09, fragment_len + 1,
1915                                      cmd_param, HCI_INIT_TIMEOUT);
1916                 if (IS_ERR(skb))
1917                         return PTR_ERR(skb);
1918 
1919                 kfree_skb(skb);
1920 
1921                 plen -= fragment_len;
1922                 param += fragment_len;
1923         }
1924 
1925         return 0;
1926 }
1927 
1928 static void btusb_intel_version_info(struct hci_dev *hdev,
1929                                      struct intel_version *ver)
1930 {
1931         const char *variant;
1932 
1933         switch (ver->fw_variant) {
1934         case 0x06:
1935                 variant = "Bootloader";
1936                 break;
1937         case 0x23:
1938                 variant = "Firmware";
1939                 break;
1940         default:
1941                 return;
1942         }
1943 
1944         BT_INFO("%s: %s revision %u.%u build %u week %u %u", hdev->name,
1945                 variant, ver->fw_revision >> 4, ver->fw_revision & 0x0f,
1946                 ver->fw_build_num, ver->fw_build_ww, 2000 + ver->fw_build_yy);
1947 }
1948 
1949 static int btusb_setup_intel_new(struct hci_dev *hdev)
1950 {
1951         static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01,
1952                                           0x00, 0x08, 0x04, 0x00 };
1953         struct btusb_data *data = hci_get_drvdata(hdev);
1954         struct sk_buff *skb;
1955         struct intel_version *ver;
1956         struct intel_boot_params *params;
1957         const struct firmware *fw;
1958         const u8 *fw_ptr;
1959         char fwname[64];
1960         ktime_t calltime, delta, rettime;
1961         unsigned long long duration;
1962         int err;
1963 
1964         BT_DBG("%s", hdev->name);
1965 
1966         calltime = ktime_get();
1967 
1968         /* Read the Intel version information to determine if the device
1969          * is in bootloader mode or if it already has operational firmware
1970          * loaded.
1971          */
1972         skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
1973         if (IS_ERR(skb)) {
1974                 BT_ERR("%s: Reading Intel version information failed (%ld)",
1975                        hdev->name, PTR_ERR(skb));
1976                 return PTR_ERR(skb);
1977         }
1978 
1979         if (skb->len != sizeof(*ver)) {
1980                 BT_ERR("%s: Intel version event size mismatch", hdev->name);
1981                 kfree_skb(skb);
1982                 return -EILSEQ;
1983         }
1984 
1985         ver = (struct intel_version *)skb->data;
1986         if (ver->status) {
1987                 BT_ERR("%s: Intel version command failure (%02x)",
1988                        hdev->name, ver->status);
1989                 err = -bt_to_errno(ver->status);
1990                 kfree_skb(skb);
1991                 return err;
1992         }
1993 
1994         /* The hardware platform number has a fixed value of 0x37 and
1995          * for now only accept this single value.
1996          */
1997         if (ver->hw_platform != 0x37) {
1998                 BT_ERR("%s: Unsupported Intel hardware platform (%u)",
1999                        hdev->name, ver->hw_platform);
2000                 kfree_skb(skb);
2001                 return -EINVAL;
2002         }
2003 
2004         /* At the moment only the hardware variant iBT 3.0 (LnP/SfP) is
2005          * supported by this firmware loading method. This check has been
2006          * put in place to ensure correct forward compatibility options
2007          * when newer hardware variants come along.
2008          */
2009         if (ver->hw_variant != 0x0b) {
2010                 BT_ERR("%s: Unsupported Intel hardware variant (%u)",
2011                        hdev->name, ver->hw_variant);
2012                 kfree_skb(skb);
2013                 return -EINVAL;
2014         }
2015 
2016         btusb_intel_version_info(hdev, ver);
2017 
2018         /* The firmware variant determines if the device is in bootloader
2019          * mode or is running operational firmware. The value 0x06 identifies
2020          * the bootloader and the value 0x23 identifies the operational
2021          * firmware.
2022          *
2023          * When the operational firmware is already present, then only
2024          * the check for valid Bluetooth device address is needed. This
2025          * determines if the device will be added as configured or
2026          * unconfigured controller.
2027          *
2028          * It is not possible to use the Secure Boot Parameters in this
2029          * case since that command is only available in bootloader mode.
2030          */
2031         if (ver->fw_variant == 0x23) {
2032                 kfree_skb(skb);
2033                 clear_bit(BTUSB_BOOTLOADER, &data->flags);
2034                 btusb_check_bdaddr_intel(hdev);
2035                 return 0;
2036         }
2037 
2038         /* If the device is not in bootloader mode, then the only possible
2039          * choice is to return an error and abort the device initialization.
2040          */
2041         if (ver->fw_variant != 0x06) {
2042                 BT_ERR("%s: Unsupported Intel firmware variant (%u)",
2043                        hdev->name, ver->fw_variant);
2044                 kfree_skb(skb);
2045                 return -ENODEV;
2046         }
2047 
2048         kfree_skb(skb);
2049 
2050         /* Read the secure boot parameters to identify the operating
2051          * details of the bootloader.
2052          */
2053         skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
2054         if (IS_ERR(skb)) {
2055                 BT_ERR("%s: Reading Intel boot parameters failed (%ld)",
2056                        hdev->name, PTR_ERR(skb));
2057                 return PTR_ERR(skb);
2058         }
2059 
2060         if (skb->len != sizeof(*params)) {
2061                 BT_ERR("%s: Intel boot parameters size mismatch", hdev->name);
2062                 kfree_skb(skb);
2063                 return -EILSEQ;
2064         }
2065 
2066         params = (struct intel_boot_params *)skb->data;
2067         if (params->status) {
2068                 BT_ERR("%s: Intel boot parameters command failure (%02x)",
2069                        hdev->name, params->status);
2070                 err = -bt_to_errno(params->status);
2071                 kfree_skb(skb);
2072                 return err;
2073         }
2074 
2075         BT_INFO("%s: Device revision is %u", hdev->name,
2076                 le16_to_cpu(params->dev_revid));
2077 
2078         BT_INFO("%s: Secure boot is %s", hdev->name,
2079                 params->secure_boot ? "enabled" : "disabled");
2080 
2081         BT_INFO("%s: Minimum firmware build %u week %u %u", hdev->name,
2082                 params->min_fw_build_nn, params->min_fw_build_cw,
2083                 2000 + params->min_fw_build_yy);
2084 
2085         /* It is required that every single firmware fragment is acknowledged
2086          * with a command complete event. If the boot parameters indicate
2087          * that this bootloader does not send them, then abort the setup.
2088          */
2089         if (params->limited_cce != 0x00) {
2090                 BT_ERR("%s: Unsupported Intel firmware loading method (%u)",
2091                        hdev->name, params->limited_cce);
2092                 kfree_skb(skb);
2093                 return -EINVAL;
2094         }
2095 
2096         /* If the OTP has no valid Bluetooth device address, then there will
2097          * also be no valid address for the operational firmware.
2098          */
2099         if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
2100                 BT_INFO("%s: No device address configured", hdev->name);
2101                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
2102         }
2103 
2104         /* With this Intel bootloader only the hardware variant and device
2105          * revision information are used to select the right firmware.
2106          *
2107          * Currently this bootloader support is limited to hardware variant
2108          * iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b).
2109          */
2110         snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi",
2111                  le16_to_cpu(params->dev_revid));
2112 
2113         err = request_firmware(&fw, fwname, &hdev->dev);
2114         if (err < 0) {
2115                 BT_ERR("%s: Failed to load Intel firmware file (%d)",
2116                        hdev->name, err);
2117                 kfree_skb(skb);
2118                 return err;
2119         }
2120 
2121         BT_INFO("%s: Found device firmware: %s", hdev->name, fwname);
2122 
2123         kfree_skb(skb);
2124 
2125         if (fw->size < 644) {
2126                 BT_ERR("%s: Invalid size of firmware file (%zu)",
2127                        hdev->name, fw->size);
2128                 err = -EBADF;
2129                 goto done;
2130         }
2131 
2132         set_bit(BTUSB_DOWNLOADING, &data->flags);
2133 
2134         /* Start the firmware download transaction with the Init fragment
2135          * represented by the 128 bytes of CSS header.
2136          */
2137         err = btusb_intel_secure_send(hdev, 0x00, 128, fw->data);
2138         if (err < 0) {
2139                 BT_ERR("%s: Failed to send firmware header (%d)",
2140                        hdev->name, err);
2141                 goto done;
2142         }
2143 
2144         /* Send the 256 bytes of public key information from the firmware
2145          * as the PKey fragment.
2146          */
2147         err = btusb_intel_secure_send(hdev, 0x03, 256, fw->data + 128);
2148         if (err < 0) {
2149                 BT_ERR("%s: Failed to send firmware public key (%d)",
2150                        hdev->name, err);
2151                 goto done;
2152         }
2153 
2154         /* Send the 256 bytes of signature information from the firmware
2155          * as the Sign fragment.
2156          */
2157         err = btusb_intel_secure_send(hdev, 0x02, 256, fw->data + 388);
2158         if (err < 0) {
2159                 BT_ERR("%s: Failed to send firmware signature (%d)",
2160                        hdev->name, err);
2161                 goto done;
2162         }
2163 
2164         fw_ptr = fw->data + 644;
2165 
2166         while (fw_ptr - fw->data < fw->size) {
2167                 struct hci_command_hdr *cmd = (void *)fw_ptr;
2168                 u8 cmd_len;
2169 
2170                 cmd_len = sizeof(*cmd) + cmd->plen;
2171 
2172                 /* Send each command from the firmware data buffer as
2173                  * a single Data fragment.
2174                  */
2175                 err = btusb_intel_secure_send(hdev, 0x01, cmd_len, fw_ptr);
2176                 if (err < 0) {
2177                         BT_ERR("%s: Failed to send firmware data (%d)",
2178                                hdev->name, err);
2179                         goto done;
2180                 }
2181 
2182                 fw_ptr += cmd_len;
2183         }
2184 
2185         set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
2186 
2187         BT_INFO("%s: Waiting for firmware download to complete", hdev->name);
2188 
2189         /* Before switching the device into operational mode and with that
2190          * booting the loaded firmware, wait for the bootloader notification
2191          * that all fragments have been successfully received.
2192          *
2193          * When the event processing receives the notification, then the
2194          * BTUSB_DOWNLOADING flag will be cleared.
2195          *
2196          * The firmware loading should not take longer than 5 seconds
2197          * and thus just timeout if that happens and fail the setup
2198          * of this device.
2199          */
2200         err = btusb_wait_on_bit_timeout(&data->flags, BTUSB_DOWNLOADING,
2201                                         msecs_to_jiffies(5000),
2202                                         TASK_INTERRUPTIBLE);
2203         if (err == 1) {
2204                 BT_ERR("%s: Firmware loading interrupted", hdev->name);
2205                 err = -EINTR;
2206                 goto done;
2207         }
2208 
2209         if (err) {
2210                 BT_ERR("%s: Firmware loading timeout", hdev->name);
2211                 err = -ETIMEDOUT;
2212                 goto done;
2213         }
2214 
2215         if (test_bit(BTUSB_FIRMWARE_FAILED, &data->flags)) {
2216                 BT_ERR("%s: Firmware loading failed", hdev->name);
2217                 err = -ENOEXEC;
2218                 goto done;
2219         }
2220 
2221         rettime = ktime_get();
2222         delta = ktime_sub(rettime, calltime);
2223         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2224 
2225         BT_INFO("%s: Firmware loaded in %llu usecs", hdev->name, duration);
2226 
2227 done:
2228         release_firmware(fw);
2229 
2230         if (err < 0)
2231                 return err;
2232 
2233         calltime = ktime_get();
2234 
2235         set_bit(BTUSB_BOOTING, &data->flags);
2236 
2237         skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(reset_param), reset_param,
2238                              HCI_INIT_TIMEOUT);
2239         if (IS_ERR(skb))
2240                 return PTR_ERR(skb);
2241 
2242         kfree_skb(skb);
2243 
2244         /* The bootloader will not indicate when the device is ready. This
2245          * is done by the operational firmware sending bootup notification.
2246          *
2247          * Booting into operational firmware should not take longer than
2248          * 1 second. However if that happens, then just fail the setup
2249          * since something went wrong.
2250          */
2251         BT_INFO("%s: Waiting for device to boot", hdev->name);
2252 
2253         err = btusb_wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,
2254                                         msecs_to_jiffies(1000),
2255                                         TASK_INTERRUPTIBLE);
2256 
2257         if (err == 1) {
2258                 BT_ERR("%s: Device boot interrupted", hdev->name);
2259                 return -EINTR;
2260         }
2261 
2262         if (err) {
2263                 BT_ERR("%s: Device boot timeout", hdev->name);
2264                 return -ETIMEDOUT;
2265         }
2266 
2267         rettime = ktime_get();
2268         delta = ktime_sub(rettime, calltime);
2269         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2270 
2271         BT_INFO("%s: Device booted in %llu usecs", hdev->name, duration);
2272 
2273         clear_bit(BTUSB_BOOTLOADER, &data->flags);
2274 
2275         return 0;
2276 }
2277 
2278 static void btusb_hw_error_intel(struct hci_dev *hdev, u8 code)
2279 {
2280         struct sk_buff *skb;
2281         u8 type = 0x00;
2282 
2283         BT_ERR("%s: Hardware error 0x%2.2x", hdev->name, code);
2284 
2285         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
2286         if (IS_ERR(skb)) {
2287                 BT_ERR("%s: Reset after hardware error failed (%ld)",
2288                        hdev->name, PTR_ERR(skb));
2289                 return;
2290         }
2291         kfree_skb(skb);
2292 
2293         skb = __hci_cmd_sync(hdev, 0xfc22, 1, &type, HCI_INIT_TIMEOUT);
2294         if (IS_ERR(skb)) {
2295                 BT_ERR("%s: Retrieving Intel exception info failed (%ld)",
2296                        hdev->name, PTR_ERR(skb));
2297                 return;
2298         }
2299 
2300         if (skb->len != 13) {
2301                 BT_ERR("%s: Exception info size mismatch", hdev->name);
2302                 kfree_skb(skb);
2303                 return;
2304         }
2305 
2306         if (skb->data[0] != 0x00) {
2307                 BT_ERR("%s: Exception info command failure (%02x)",
2308                        hdev->name, skb->data[0]);
2309                 kfree_skb(skb);
2310                 return;
2311         }
2312 
2313         BT_ERR("%s: Exception info %s", hdev->name, (char *)(skb->data + 1));
2314 
2315         kfree_skb(skb);
2316 }
2317 
2318 static int btusb_set_bdaddr_intel(struct hci_dev *hdev, const bdaddr_t *bdaddr)
2319 {
2320         struct sk_buff *skb;
2321         long ret;
2322 
2323         skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT);
2324         if (IS_ERR(skb)) {
2325                 ret = PTR_ERR(skb);
2326                 BT_ERR("%s: changing Intel device address failed (%ld)",
2327                        hdev->name, ret);
2328                 return ret;
2329         }
2330         kfree_skb(skb);
2331 
2332         return 0;
2333 }
2334 
2335 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
2336                                     const bdaddr_t *bdaddr)
2337 {
2338         struct sk_buff *skb;
2339         u8 buf[8];
2340         long ret;
2341 
2342         buf[0] = 0xfe;
2343         buf[1] = sizeof(bdaddr_t);
2344         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
2345 
2346         skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2347         if (IS_ERR(skb)) {
2348                 ret = PTR_ERR(skb);
2349                 BT_ERR("%s: changing Marvell device address failed (%ld)",
2350                        hdev->name, ret);
2351                 return ret;
2352         }
2353         kfree_skb(skb);
2354 
2355         return 0;
2356 }
2357 
2358 #define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20, 0x00}})
2359 
2360 static int btusb_setup_bcm_patchram(struct hci_dev *hdev)
2361 {
2362         struct btusb_data *data = hci_get_drvdata(hdev);
2363         struct usb_device *udev = data->udev;
2364         char fw_name[64];
2365         const struct firmware *fw;
2366         const u8 *fw_ptr;
2367         size_t fw_size;
2368         const struct hci_command_hdr *cmd;
2369         const u8 *cmd_param;
2370         u16 opcode;
2371         struct sk_buff *skb;
2372         struct hci_rp_read_local_version *ver;
2373         struct hci_rp_read_bd_addr *bda;
2374         long ret;
2375 
2376         snprintf(fw_name, sizeof(fw_name), "brcm/%s-%04x-%04x.hcd",
2377                  udev->product ? udev->product : "BCM",
2378                  le16_to_cpu(udev->descriptor.idVendor),
2379                  le16_to_cpu(udev->descriptor.idProduct));
2380 
2381         ret = request_firmware(&fw, fw_name, &hdev->dev);
2382         if (ret < 0) {
2383                 BT_INFO("%s: BCM: patch %s not found", hdev->name, fw_name);
2384                 return 0;
2385         }
2386 
2387         /* Reset */
2388         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
2389         if (IS_ERR(skb)) {
2390                 ret = PTR_ERR(skb);
2391                 BT_ERR("%s: HCI_OP_RESET failed (%ld)", hdev->name, ret);
2392                 goto done;
2393         }
2394         kfree_skb(skb);
2395 
2396         /* Read Local Version Info */
2397         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
2398                              HCI_INIT_TIMEOUT);
2399         if (IS_ERR(skb)) {
2400                 ret = PTR_ERR(skb);
2401                 BT_ERR("%s: HCI_OP_READ_LOCAL_VERSION failed (%ld)",
2402                        hdev->name, ret);
2403                 goto done;
2404         }
2405 
2406         if (skb->len != sizeof(*ver)) {
2407                 BT_ERR("%s: HCI_OP_READ_LOCAL_VERSION event length mismatch",
2408                        hdev->name);
2409                 kfree_skb(skb);
2410                 ret = -EIO;
2411                 goto done;
2412         }
2413 
2414         ver = (struct hci_rp_read_local_version *)skb->data;
2415         BT_INFO("%s: BCM: patching hci_ver=%02x hci_rev=%04x lmp_ver=%02x "
2416                 "lmp_subver=%04x", hdev->name, ver->hci_ver, ver->hci_rev,
2417                 ver->lmp_ver, ver->lmp_subver);
2418         kfree_skb(skb);
2419 
2420         /* Start Download */
2421         skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
2422         if (IS_ERR(skb)) {
2423                 ret = PTR_ERR(skb);
2424                 BT_ERR("%s: BCM: Download Minidrv command failed (%ld)",
2425                        hdev->name, ret);
2426                 goto reset_fw;
2427         }
2428         kfree_skb(skb);
2429 
2430         /* 50 msec delay after Download Minidrv completes */
2431         msleep(50);
2432 
2433         fw_ptr = fw->data;
2434         fw_size = fw->size;
2435 
2436         while (fw_size >= sizeof(*cmd)) {
2437                 cmd = (struct hci_command_hdr *)fw_ptr;
2438                 fw_ptr += sizeof(*cmd);
2439                 fw_size -= sizeof(*cmd);
2440 
2441                 if (fw_size < cmd->plen) {
2442                         BT_ERR("%s: BCM: patch %s is corrupted",
2443                                hdev->name, fw_name);
2444                         ret = -EINVAL;
2445                         goto reset_fw;
2446                 }
2447 
2448                 cmd_param = fw_ptr;
2449                 fw_ptr += cmd->plen;
2450                 fw_size -= cmd->plen;
2451 
2452                 opcode = le16_to_cpu(cmd->opcode);
2453 
2454                 skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
2455                                      HCI_INIT_TIMEOUT);
2456                 if (IS_ERR(skb)) {
2457                         ret = PTR_ERR(skb);
2458                         BT_ERR("%s: BCM: patch command %04x failed (%ld)",
2459                                hdev->name, opcode, ret);
2460                         goto reset_fw;
2461                 }
2462                 kfree_skb(skb);
2463         }
2464 
2465         /* 250 msec delay after Launch Ram completes */
2466         msleep(250);
2467 
2468 reset_fw:
2469         /* Reset */
2470         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
2471         if (IS_ERR(skb)) {
2472                 ret = PTR_ERR(skb);
2473                 BT_ERR("%s: HCI_OP_RESET failed (%ld)", hdev->name, ret);
2474                 goto done;
2475         }
2476         kfree_skb(skb);
2477 
2478         /* Read Local Version Info */
2479         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
2480                              HCI_INIT_TIMEOUT);
2481         if (IS_ERR(skb)) {
2482                 ret = PTR_ERR(skb);
2483                 BT_ERR("%s: HCI_OP_READ_LOCAL_VERSION failed (%ld)",
2484                        hdev->name, ret);
2485                 goto done;
2486         }
2487 
2488         if (skb->len != sizeof(*ver)) {
2489                 BT_ERR("%s: HCI_OP_READ_LOCAL_VERSION event length mismatch",
2490                        hdev->name);
2491                 kfree_skb(skb);
2492                 ret = -EIO;
2493                 goto done;
2494         }
2495 
2496         ver = (struct hci_rp_read_local_version *)skb->data;
2497         BT_INFO("%s: BCM: firmware hci_ver=%02x hci_rev=%04x lmp_ver=%02x "
2498                 "lmp_subver=%04x", hdev->name, ver->hci_ver, ver->hci_rev,
2499                 ver->lmp_ver, ver->lmp_subver);
2500         kfree_skb(skb);
2501 
2502         /* Read BD Address */
2503         skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
2504                              HCI_INIT_TIMEOUT);
2505         if (IS_ERR(skb)) {
2506                 ret = PTR_ERR(skb);
2507                 BT_ERR("%s: HCI_OP_READ_BD_ADDR failed (%ld)",
2508                        hdev->name, ret);
2509                 goto done;
2510         }
2511 
2512         if (skb->len != sizeof(*bda)) {
2513                 BT_ERR("%s: HCI_OP_READ_BD_ADDR event length mismatch",
2514                        hdev->name);
2515                 kfree_skb(skb);
2516                 ret = -EIO;
2517                 goto done;
2518         }
2519 
2520         bda = (struct hci_rp_read_bd_addr *)skb->data;
2521         if (bda->status) {
2522                 BT_ERR("%s: HCI_OP_READ_BD_ADDR error status (%02x)",
2523                        hdev->name, bda->status);
2524                 kfree_skb(skb);
2525                 ret = -bt_to_errno(bda->status);
2526                 goto done;
2527         }
2528 
2529         /* The address 00:20:70:02:A0:00 indicates a BCM20702A0 controller
2530          * with no configured address.
2531          */
2532         if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0)) {
2533                 BT_INFO("%s: BCM: using default device address (%pMR)",
2534                         hdev->name, &bda->bdaddr);
2535                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
2536         }
2537 
2538         kfree_skb(skb);
2539 
2540 done:
2541         release_firmware(fw);
2542 
2543         return ret;
2544 }
2545 
2546 static int btusb_set_bdaddr_bcm(struct hci_dev *hdev, const bdaddr_t *bdaddr)
2547 {
2548         struct sk_buff *skb;
2549         long ret;
2550 
2551         skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
2552         if (IS_ERR(skb)) {
2553                 ret = PTR_ERR(skb);
2554                 BT_ERR("%s: BCM: Change address command failed (%ld)",
2555                        hdev->name, ret);
2556                 return ret;
2557         }
2558         kfree_skb(skb);
2559 
2560         return 0;
2561 }
2562 
2563 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
2564                                     const bdaddr_t *bdaddr)
2565 {
2566         struct sk_buff *skb;
2567         u8 buf[10];
2568         long ret;
2569 
2570         buf[0] = 0x01;
2571         buf[1] = 0x01;
2572         buf[2] = 0x00;
2573         buf[3] = sizeof(bdaddr_t);
2574         memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
2575 
2576         skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2577         if (IS_ERR(skb)) {
2578                 ret = PTR_ERR(skb);
2579                 BT_ERR("%s: Change address command failed (%ld)",
2580                        hdev->name, ret);
2581                 return ret;
2582         }
2583         kfree_skb(skb);
2584 
2585         return 0;
2586 }
2587 
2588 static int btusb_probe(struct usb_interface *intf,
2589                        const struct usb_device_id *id)
2590 {
2591         struct usb_endpoint_descriptor *ep_desc;
2592         struct btusb_data *data;
2593         struct hci_dev *hdev;
2594         int i, err;
2595 
2596         BT_DBG("intf %p id %p", intf, id);
2597 
2598         /* interface numbers are hardcoded in the spec */
2599         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
2600                 return -ENODEV;
2601 
2602         if (!id->driver_info) {
2603                 const struct usb_device_id *match;
2604 
2605                 match = usb_match_id(intf, blacklist_table);
2606                 if (match)
2607                         id = match;
2608         }
2609 
2610         if (id->driver_info == BTUSB_IGNORE)
2611                 return -ENODEV;
2612 
2613         if (id->driver_info & BTUSB_ATH3012) {
2614                 struct usb_device *udev = interface_to_usbdev(intf);
2615 
2616                 /* Old firmware would otherwise let ath3k driver load
2617                  * patch and sysconfig files */
2618                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
2619                         return -ENODEV;
2620         }
2621 
2622         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
2623         if (!data)
2624                 return -ENOMEM;
2625 
2626         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2627                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2628 
2629                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
2630                         data->intr_ep = ep_desc;
2631                         continue;
2632                 }
2633 
2634                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
2635                         data->bulk_tx_ep = ep_desc;
2636                         continue;
2637                 }
2638 
2639                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
2640                         data->bulk_rx_ep = ep_desc;
2641                         continue;
2642                 }
2643         }
2644 
2645         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
2646                 return -ENODEV;
2647 
2648         if (id->driver_info & BTUSB_AMP) {
2649                 data->cmdreq_type = USB_TYPE_CLASS | 0x01;
2650                 data->cmdreq = 0x2b;
2651         } else {
2652                 data->cmdreq_type = USB_TYPE_CLASS;
2653                 data->cmdreq = 0x00;
2654         }
2655 
2656         data->udev = interface_to_usbdev(intf);
2657         data->intf = intf;
2658 
2659         INIT_WORK(&data->work, btusb_work);
2660         INIT_WORK(&data->waker, btusb_waker);
2661         init_usb_anchor(&data->deferred);
2662         init_usb_anchor(&data->tx_anchor);
2663         spin_lock_init(&data->txlock);
2664 
2665         init_usb_anchor(&data->intr_anchor);
2666         init_usb_anchor(&data->bulk_anchor);
2667         init_usb_anchor(&data->isoc_anchor);
2668         spin_lock_init(&data->rxlock);
2669 
2670         if (id->driver_info & BTUSB_INTEL_NEW) {
2671                 data->recv_event = btusb_recv_event_intel;
2672                 data->recv_bulk = btusb_recv_bulk_intel;
2673                 set_bit(BTUSB_BOOTLOADER, &data->flags);
2674         } else {
2675                 data->recv_event = hci_recv_frame;
2676                 data->recv_bulk = btusb_recv_bulk;
2677         }
2678 
2679         hdev = hci_alloc_dev();
2680         if (!hdev)
2681                 return -ENOMEM;
2682 
2683         hdev->bus = HCI_USB;
2684         hci_set_drvdata(hdev, data);
2685 
2686         if (id->driver_info & BTUSB_AMP)
2687                 hdev->dev_type = HCI_AMP;
2688         else
2689                 hdev->dev_type = HCI_BREDR;
2690 
2691         data->hdev = hdev;
2692 
2693         SET_HCIDEV_DEV(hdev, &intf->dev);
2694 
2695         hdev->open   = btusb_open;
2696         hdev->close  = btusb_close;
2697         hdev->flush  = btusb_flush;
2698         hdev->send   = btusb_send_frame;
2699         hdev->notify = btusb_notify;
2700 
2701         if (id->driver_info & BTUSB_BCM92035)
2702                 hdev->setup = btusb_setup_bcm92035;
2703 
2704         if (id->driver_info & BTUSB_BCM_PATCHRAM) {
2705                 hdev->setup = btusb_setup_bcm_patchram;
2706                 hdev->set_bdaddr = btusb_set_bdaddr_bcm;
2707                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2708         }
2709 
2710         if (id->driver_info & BTUSB_INTEL) {
2711                 hdev->setup = btusb_setup_intel;
2712                 hdev->set_bdaddr = btusb_set_bdaddr_intel;
2713                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2714         }
2715 
2716         if (id->driver_info & BTUSB_INTEL_NEW) {
2717                 hdev->send = btusb_send_frame_intel;
2718                 hdev->setup = btusb_setup_intel_new;
2719                 hdev->hw_error = btusb_hw_error_intel;
2720                 hdev->set_bdaddr = btusb_set_bdaddr_intel;
2721                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2722         }
2723 
2724         if (id->driver_info & BTUSB_MARVELL)
2725                 hdev->set_bdaddr = btusb_set_bdaddr_marvell;
2726 
2727         if (id->driver_info & BTUSB_SWAVE) {
2728                 set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
2729                 set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
2730         }
2731 
2732         if (id->driver_info & BTUSB_INTEL_BOOT)
2733                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
2734 
2735         if (id->driver_info & BTUSB_ATH3012) {
2736                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
2737                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2738         }
2739 
2740         if (id->driver_info & BTUSB_AMP) {
2741                 /* AMP controllers do not support SCO packets */
2742                 data->isoc = NULL;
2743         } else {
2744                 /* Interface numbers are hardcoded in the specification */
2745                 data->isoc = usb_ifnum_to_if(data->udev, 1);
2746         }
2747 
2748         if (!reset)
2749                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2750 
2751         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
2752                 if (!disable_scofix)
2753                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
2754         }
2755 
2756         if (id->driver_info & BTUSB_BROKEN_ISOC)
2757                 data->isoc = NULL;
2758 
2759         if (id->driver_info & BTUSB_DIGIANSWER) {
2760                 data->cmdreq_type = USB_TYPE_VENDOR;
2761                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2762         }
2763 
2764         if (id->driver_info & BTUSB_CSR) {
2765                 struct usb_device *udev = data->udev;
2766                 u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
2767 
2768                 /* Old firmware would otherwise execute USB reset */
2769                 if (bcdDevice < 0x117)
2770                         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2771 
2772                 /* Fake CSR devices with broken commands */
2773                 if (bcdDevice <= 0x100)
2774                         hdev->setup = btusb_setup_csr;
2775         }
2776 
2777         if (id->driver_info & BTUSB_SNIFFER) {
2778                 struct usb_device *udev = data->udev;
2779 
2780                 /* New sniffer firmware has crippled HCI interface */
2781                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
2782                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
2783         }
2784 
2785         if (id->driver_info & BTUSB_INTEL_BOOT) {
2786                 /* A bug in the bootloader causes that interrupt interface is
2787                  * only enabled after receiving SetInterface(0, AltSetting=0).
2788                  */
2789                 err = usb_set_interface(data->udev, 0, 0);
2790                 if (err < 0) {
2791                         BT_ERR("failed to set interface 0, alt 0 %d", err);
2792                         hci_free_dev(hdev);
2793                         return err;
2794                 }
2795         }
2796 
2797         if (data->isoc) {
2798                 err = usb_driver_claim_interface(&btusb_driver,
2799                                                  data->isoc, data);
2800                 if (err < 0) {
2801                         hci_free_dev(hdev);
2802                         return err;
2803                 }
2804         }
2805 
2806         err = hci_register_dev(hdev);
2807         if (err < 0) {
2808                 hci_free_dev(hdev);
2809                 return err;
2810         }
2811 
2812         usb_set_intfdata(intf, data);
2813 
2814         return 0;
2815 }
2816 
2817 static void btusb_disconnect(struct usb_interface *intf)
2818 {
2819         struct btusb_data *data = usb_get_intfdata(intf);
2820         struct hci_dev *hdev;
2821 
2822         BT_DBG("intf %p", intf);
2823 
2824         if (!data)
2825                 return;
2826 
2827         hdev = data->hdev;
2828         usb_set_intfdata(data->intf, NULL);
2829 
2830         if (data->isoc)
2831                 usb_set_intfdata(data->isoc, NULL);
2832 
2833         hci_unregister_dev(hdev);
2834 
2835         if (intf == data->isoc)
2836                 usb_driver_release_interface(&btusb_driver, data->intf);
2837         else if (data->isoc)
2838                 usb_driver_release_interface(&btusb_driver, data->isoc);
2839 
2840         hci_free_dev(hdev);
2841 }
2842 
2843 #ifdef CONFIG_PM
2844 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
2845 {
2846         struct btusb_data *data = usb_get_intfdata(intf);
2847 
2848         BT_DBG("intf %p", intf);
2849 
2850         if (data->suspend_count++)
2851                 return 0;
2852 
2853         spin_lock_irq(&data->txlock);
2854         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
2855                 set_bit(BTUSB_SUSPENDING, &data->flags);
2856                 spin_unlock_irq(&data->txlock);
2857         } else {
2858                 spin_unlock_irq(&data->txlock);
2859                 data->suspend_count--;
2860                 return -EBUSY;
2861         }
2862 
2863         cancel_work_sync(&data->work);
2864 
2865         btusb_stop_traffic(data);
2866         usb_kill_anchored_urbs(&data->tx_anchor);
2867 
2868         return 0;
2869 }
2870 
2871 static void play_deferred(struct btusb_data *data)
2872 {
2873         struct urb *urb;
2874         int err;
2875 
2876         while ((urb = usb_get_from_anchor(&data->deferred))) {
2877                 err = usb_submit_urb(urb, GFP_ATOMIC);
2878                 if (err < 0)
2879                         break;
2880 
2881                 data->tx_in_flight++;
2882         }
2883         usb_scuttle_anchored_urbs(&data->deferred);
2884 }
2885 
2886 static int btusb_resume(struct usb_interface *intf)
2887 {
2888         struct btusb_data *data = usb_get_intfdata(intf);
2889         struct hci_dev *hdev = data->hdev;
2890         int err = 0;
2891 
2892         BT_DBG("intf %p", intf);
2893 
2894         if (--data->suspend_count)
2895                 return 0;
2896 
2897         if (!test_bit(HCI_RUNNING, &hdev->flags))
2898                 goto done;
2899 
2900         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
2901                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
2902                 if (err < 0) {
2903                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
2904                         goto failed;
2905                 }
2906         }
2907 
2908         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
2909                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
2910                 if (err < 0) {
2911                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
2912                         goto failed;
2913                 }
2914 
2915                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
2916         }
2917 
2918         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
2919                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
2920                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
2921                 else
2922                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
2923         }
2924 
2925         spin_lock_irq(&data->txlock);
2926         play_deferred(data);
2927         clear_bit(BTUSB_SUSPENDING, &data->flags);
2928         spin_unlock_irq(&data->txlock);
2929         schedule_work(&data->work);
2930 
2931         return 0;
2932 
2933 failed:
2934         usb_scuttle_anchored_urbs(&data->deferred);
2935 done:
2936         spin_lock_irq(&data->txlock);
2937         clear_bit(BTUSB_SUSPENDING, &data->flags);
2938         spin_unlock_irq(&data->txlock);
2939 
2940         return err;
2941 }
2942 #endif
2943 
2944 static struct usb_driver btusb_driver = {
2945         .name           = "btusb",
2946         .probe          = btusb_probe,
2947         .disconnect     = btusb_disconnect,
2948 #ifdef CONFIG_PM
2949         .suspend        = btusb_suspend,
2950         .resume         = btusb_resume,
2951 #endif
2952         .id_table       = btusb_table,
2953         .supports_autosuspend = 1,
2954         .disable_hub_initiated_lpm = 1,
2955 };
2956 
2957 module_usb_driver(btusb_driver);
2958 
2959 module_param(disable_scofix, bool, 0644);
2960 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
2961 
2962 module_param(force_scofix, bool, 0644);
2963 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
2964 
2965 module_param(reset, bool, 0644);
2966 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
2967 
2968 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
2969 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
2970 MODULE_VERSION(VERSION);
2971 MODULE_LICENSE("GPL");
2972 

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