Version:  2.0.40 2.2.26 2.4.37 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 4.1 4.2 4.3 4.4

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 #include <asm/unaligned.h>
 28 
 29 #include <net/bluetooth/bluetooth.h>
 30 #include <net/bluetooth/hci_core.h>
 31 
 32 #include "btintel.h"
 33 #include "btbcm.h"
 34 #include "btrtl.h"
 35 
 36 #define VERSION "0.8"
 37 
 38 static bool disable_scofix;
 39 static bool force_scofix;
 40 
 41 static bool reset = true;
 42 
 43 static struct usb_driver btusb_driver;
 44 
 45 #define BTUSB_IGNORE            0x01
 46 #define BTUSB_DIGIANSWER        0x02
 47 #define BTUSB_CSR               0x04
 48 #define BTUSB_SNIFFER           0x08
 49 #define BTUSB_BCM92035          0x10
 50 #define BTUSB_BROKEN_ISOC       0x20
 51 #define BTUSB_WRONG_SCO_MTU     0x40
 52 #define BTUSB_ATH3012           0x80
 53 #define BTUSB_INTEL             0x100
 54 #define BTUSB_INTEL_BOOT        0x200
 55 #define BTUSB_BCM_PATCHRAM      0x400
 56 #define BTUSB_MARVELL           0x800
 57 #define BTUSB_SWAVE             0x1000
 58 #define BTUSB_INTEL_NEW         0x2000
 59 #define BTUSB_AMP               0x4000
 60 #define BTUSB_QCA_ROME          0x8000
 61 #define BTUSB_BCM_APPLE         0x10000
 62 #define BTUSB_REALTEK           0x20000
 63 #define BTUSB_BCM2045           0x40000
 64 #define BTUSB_IFNUM_2           0x80000
 65 
 66 static const struct usb_device_id btusb_table[] = {
 67         /* Generic Bluetooth USB device */
 68         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
 69 
 70         /* Generic Bluetooth AMP device */
 71         { USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
 72 
 73         /* Generic Bluetooth USB interface */
 74         { USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },
 75 
 76         /* Apple-specific (Broadcom) devices */
 77         { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
 78           .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },
 79 
 80         /* MediaTek MT76x0E */
 81         { USB_DEVICE(0x0e8d, 0x763f) },
 82 
 83         /* Broadcom SoftSailing reporting vendor specific */
 84         { USB_DEVICE(0x0a5c, 0x21e1) },
 85 
 86         /* Apple MacBookPro 7,1 */
 87         { USB_DEVICE(0x05ac, 0x8213) },
 88 
 89         /* Apple iMac11,1 */
 90         { USB_DEVICE(0x05ac, 0x8215) },
 91 
 92         /* Apple MacBookPro6,2 */
 93         { USB_DEVICE(0x05ac, 0x8218) },
 94 
 95         /* Apple MacBookAir3,1, MacBookAir3,2 */
 96         { USB_DEVICE(0x05ac, 0x821b) },
 97 
 98         /* Apple MacBookAir4,1 */
 99         { USB_DEVICE(0x05ac, 0x821f) },
100 
101         /* Apple MacBookPro8,2 */
102         { USB_DEVICE(0x05ac, 0x821a) },
103 
104         /* Apple MacMini5,1 */
105         { USB_DEVICE(0x05ac, 0x8281) },
106 
107         /* AVM BlueFRITZ! USB v2.0 */
108         { USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },
109 
110         /* Bluetooth Ultraport Module from IBM */
111         { USB_DEVICE(0x04bf, 0x030a) },
112 
113         /* ALPS Modules with non-standard id */
114         { USB_DEVICE(0x044e, 0x3001) },
115         { USB_DEVICE(0x044e, 0x3002) },
116 
117         /* Ericsson with non-standard id */
118         { USB_DEVICE(0x0bdb, 0x1002) },
119 
120         /* Canyon CN-BTU1 with HID interfaces */
121         { USB_DEVICE(0x0c10, 0x0000) },
122 
123         /* Broadcom BCM20702A0 */
124         { USB_DEVICE(0x413c, 0x8197) },
125 
126         /* Broadcom BCM20702B0 (Dynex/Insignia) */
127         { USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
128 
129         /* Broadcom BCM43142A0 (Foxconn/Lenovo) */
130         { USB_DEVICE(0x105b, 0xe065), .driver_info = BTUSB_BCM_PATCHRAM },
131 
132         /* Foxconn - Hon Hai */
133         { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
134           .driver_info = BTUSB_BCM_PATCHRAM },
135 
136         /* Lite-On Technology - Broadcom based */
137         { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
138           .driver_info = BTUSB_BCM_PATCHRAM },
139 
140         /* Broadcom devices with vendor specific id */
141         { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
142           .driver_info = BTUSB_BCM_PATCHRAM },
143 
144         /* ASUSTek Computer - Broadcom based */
145         { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
146           .driver_info = BTUSB_BCM_PATCHRAM },
147 
148         /* Belkin F8065bf - Broadcom based */
149         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
150           .driver_info = BTUSB_BCM_PATCHRAM },
151 
152         /* IMC Networks - Broadcom based */
153         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
154           .driver_info = BTUSB_BCM_PATCHRAM },
155 
156         /* Intel Bluetooth USB Bootloader (RAM module) */
157         { USB_DEVICE(0x8087, 0x0a5a),
158           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
159 
160         { }     /* Terminating entry */
161 };
162 
163 MODULE_DEVICE_TABLE(usb, btusb_table);
164 
165 static const struct usb_device_id blacklist_table[] = {
166         /* CSR BlueCore devices */
167         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
168 
169         /* Broadcom BCM2033 without firmware */
170         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
171 
172         /* Broadcom BCM2045 devices */
173         { USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },
174 
175         /* Atheros 3011 with sflash firmware */
176         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
177         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
178         { USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
179         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
180         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
181         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
182         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
183 
184         /* Atheros AR9285 Malbec with sflash firmware */
185         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
186 
187         /* Atheros 3012 with sflash firmware */
188         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
189         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
190         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
191         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
192         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
193         { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
194         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
195         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
196         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
197         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
198         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
199         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
200         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
201         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
202         { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
203         { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
204         { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
205         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
206         { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
207         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
208         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
209         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
210         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
211         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
212         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
213         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
214         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
215         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
216         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
217         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
218         { USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
219         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
220         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
221         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
222         { USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
223         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
224         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
225         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
226         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
227         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
228         { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
229         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
230         { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
231 
232         /* Atheros AR5BBU12 with sflash firmware */
233         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
234 
235         /* Atheros AR5BBU12 with sflash firmware */
236         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
237         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
238 
239         /* QCA ROME chipset */
240         { USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME },
241         { USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME },
242         { USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME },
243 
244         /* Broadcom BCM2035 */
245         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
246         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
247         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
248 
249         /* Broadcom BCM2045 */
250         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
251         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
252 
253         /* IBM/Lenovo ThinkPad with Broadcom chip */
254         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
255         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
256 
257         /* HP laptop with Broadcom chip */
258         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
259 
260         /* Dell laptop with Broadcom chip */
261         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
262 
263         /* Dell Wireless 370 and 410 devices */
264         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
265         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
266 
267         /* Belkin F8T012 and F8T013 devices */
268         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
269         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
270 
271         /* Asus WL-BTD202 device */
272         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
273 
274         /* Kensington Bluetooth USB adapter */
275         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
276 
277         /* RTX Telecom based adapters with buggy SCO support */
278         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
279         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
280 
281         /* CONWISE Technology based adapters with buggy SCO support */
282         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
283 
284         /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
285         { USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
286 
287         /* Digianswer devices */
288         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
289         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
290 
291         /* CSR BlueCore Bluetooth Sniffer */
292         { USB_DEVICE(0x0a12, 0x0002),
293           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
294 
295         /* Frontline ComProbe Bluetooth Sniffer */
296         { USB_DEVICE(0x16d3, 0x0002),
297           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
298 
299         /* Marvell Bluetooth devices */
300         { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
301         { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
302 
303         /* Intel Bluetooth devices */
304         { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
305         { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
306         { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },
307         { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_NEW },
308 
309         /* Other Intel Bluetooth devices */
310         { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
311           .driver_info = BTUSB_IGNORE },
312 
313         /* Realtek Bluetooth devices */
314         { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
315           .driver_info = BTUSB_REALTEK },
316 
317         /* Additional Realtek 8723AE Bluetooth devices */
318         { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
319         { USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
320 
321         /* Additional Realtek 8723BE Bluetooth devices */
322         { USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
323         { USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
324         { USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
325         { USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
326         { USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
327 
328         /* Additional Realtek 8821AE Bluetooth devices */
329         { USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
330         { USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
331         { USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
332         { USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
333         { USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
334 
335         /* Silicon Wave based devices */
336         { USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
337 
338         { }     /* Terminating entry */
339 };
340 
341 #define BTUSB_MAX_ISOC_FRAMES   10
342 
343 #define BTUSB_INTR_RUNNING      0
344 #define BTUSB_BULK_RUNNING      1
345 #define BTUSB_ISOC_RUNNING      2
346 #define BTUSB_SUSPENDING        3
347 #define BTUSB_DID_ISO_RESUME    4
348 #define BTUSB_BOOTLOADER        5
349 #define BTUSB_DOWNLOADING       6
350 #define BTUSB_FIRMWARE_LOADED   7
351 #define BTUSB_FIRMWARE_FAILED   8
352 #define BTUSB_BOOTING           9
353 #define BTUSB_RESET_RESUME      10
354 #define BTUSB_DIAG_RUNNING      11
355 
356 struct btusb_data {
357         struct hci_dev       *hdev;
358         struct usb_device    *udev;
359         struct usb_interface *intf;
360         struct usb_interface *isoc;
361         struct usb_interface *diag;
362 
363         unsigned long flags;
364 
365         struct work_struct work;
366         struct work_struct waker;
367 
368         struct usb_anchor deferred;
369         struct usb_anchor tx_anchor;
370         int tx_in_flight;
371         spinlock_t txlock;
372 
373         struct usb_anchor intr_anchor;
374         struct usb_anchor bulk_anchor;
375         struct usb_anchor isoc_anchor;
376         struct usb_anchor diag_anchor;
377         spinlock_t rxlock;
378 
379         struct sk_buff *evt_skb;
380         struct sk_buff *acl_skb;
381         struct sk_buff *sco_skb;
382 
383         struct usb_endpoint_descriptor *intr_ep;
384         struct usb_endpoint_descriptor *bulk_tx_ep;
385         struct usb_endpoint_descriptor *bulk_rx_ep;
386         struct usb_endpoint_descriptor *isoc_tx_ep;
387         struct usb_endpoint_descriptor *isoc_rx_ep;
388         struct usb_endpoint_descriptor *diag_tx_ep;
389         struct usb_endpoint_descriptor *diag_rx_ep;
390 
391         __u8 cmdreq_type;
392         __u8 cmdreq;
393 
394         unsigned int sco_num;
395         int isoc_altsetting;
396         int suspend_count;
397 
398         int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
399         int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
400 
401         int (*setup_on_usb)(struct hci_dev *hdev);
402 };
403 
404 static inline void btusb_free_frags(struct btusb_data *data)
405 {
406         unsigned long flags;
407 
408         spin_lock_irqsave(&data->rxlock, flags);
409 
410         kfree_skb(data->evt_skb);
411         data->evt_skb = NULL;
412 
413         kfree_skb(data->acl_skb);
414         data->acl_skb = NULL;
415 
416         kfree_skb(data->sco_skb);
417         data->sco_skb = NULL;
418 
419         spin_unlock_irqrestore(&data->rxlock, flags);
420 }
421 
422 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
423 {
424         struct sk_buff *skb;
425         int err = 0;
426 
427         spin_lock(&data->rxlock);
428         skb = data->evt_skb;
429 
430         while (count) {
431                 int len;
432 
433                 if (!skb) {
434                         skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
435                         if (!skb) {
436                                 err = -ENOMEM;
437                                 break;
438                         }
439 
440                         bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
441                         bt_cb(skb)->expect = HCI_EVENT_HDR_SIZE;
442                 }
443 
444                 len = min_t(uint, bt_cb(skb)->expect, count);
445                 memcpy(skb_put(skb, len), buffer, len);
446 
447                 count -= len;
448                 buffer += len;
449                 bt_cb(skb)->expect -= len;
450 
451                 if (skb->len == HCI_EVENT_HDR_SIZE) {
452                         /* Complete event header */
453                         bt_cb(skb)->expect = hci_event_hdr(skb)->plen;
454 
455                         if (skb_tailroom(skb) < bt_cb(skb)->expect) {
456                                 kfree_skb(skb);
457                                 skb = NULL;
458 
459                                 err = -EILSEQ;
460                                 break;
461                         }
462                 }
463 
464                 if (bt_cb(skb)->expect == 0) {
465                         /* Complete frame */
466                         data->recv_event(data->hdev, skb);
467                         skb = NULL;
468                 }
469         }
470 
471         data->evt_skb = skb;
472         spin_unlock(&data->rxlock);
473 
474         return err;
475 }
476 
477 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
478 {
479         struct sk_buff *skb;
480         int err = 0;
481 
482         spin_lock(&data->rxlock);
483         skb = data->acl_skb;
484 
485         while (count) {
486                 int len;
487 
488                 if (!skb) {
489                         skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
490                         if (!skb) {
491                                 err = -ENOMEM;
492                                 break;
493                         }
494 
495                         bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
496                         bt_cb(skb)->expect = HCI_ACL_HDR_SIZE;
497                 }
498 
499                 len = min_t(uint, bt_cb(skb)->expect, count);
500                 memcpy(skb_put(skb, len), buffer, len);
501 
502                 count -= len;
503                 buffer += len;
504                 bt_cb(skb)->expect -= len;
505 
506                 if (skb->len == HCI_ACL_HDR_SIZE) {
507                         __le16 dlen = hci_acl_hdr(skb)->dlen;
508 
509                         /* Complete ACL header */
510                         bt_cb(skb)->expect = __le16_to_cpu(dlen);
511 
512                         if (skb_tailroom(skb) < bt_cb(skb)->expect) {
513                                 kfree_skb(skb);
514                                 skb = NULL;
515 
516                                 err = -EILSEQ;
517                                 break;
518                         }
519                 }
520 
521                 if (bt_cb(skb)->expect == 0) {
522                         /* Complete frame */
523                         hci_recv_frame(data->hdev, skb);
524                         skb = NULL;
525                 }
526         }
527 
528         data->acl_skb = skb;
529         spin_unlock(&data->rxlock);
530 
531         return err;
532 }
533 
534 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
535 {
536         struct sk_buff *skb;
537         int err = 0;
538 
539         spin_lock(&data->rxlock);
540         skb = data->sco_skb;
541 
542         while (count) {
543                 int len;
544 
545                 if (!skb) {
546                         skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
547                         if (!skb) {
548                                 err = -ENOMEM;
549                                 break;
550                         }
551 
552                         bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
553                         bt_cb(skb)->expect = HCI_SCO_HDR_SIZE;
554                 }
555 
556                 len = min_t(uint, bt_cb(skb)->expect, count);
557                 memcpy(skb_put(skb, len), buffer, len);
558 
559                 count -= len;
560                 buffer += len;
561                 bt_cb(skb)->expect -= len;
562 
563                 if (skb->len == HCI_SCO_HDR_SIZE) {
564                         /* Complete SCO header */
565                         bt_cb(skb)->expect = hci_sco_hdr(skb)->dlen;
566 
567                         if (skb_tailroom(skb) < bt_cb(skb)->expect) {
568                                 kfree_skb(skb);
569                                 skb = NULL;
570 
571                                 err = -EILSEQ;
572                                 break;
573                         }
574                 }
575 
576                 if (bt_cb(skb)->expect == 0) {
577                         /* Complete frame */
578                         hci_recv_frame(data->hdev, skb);
579                         skb = NULL;
580                 }
581         }
582 
583         data->sco_skb = skb;
584         spin_unlock(&data->rxlock);
585 
586         return err;
587 }
588 
589 static void btusb_intr_complete(struct urb *urb)
590 {
591         struct hci_dev *hdev = urb->context;
592         struct btusb_data *data = hci_get_drvdata(hdev);
593         int err;
594 
595         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
596                urb->actual_length);
597 
598         if (!test_bit(HCI_RUNNING, &hdev->flags))
599                 return;
600 
601         if (urb->status == 0) {
602                 hdev->stat.byte_rx += urb->actual_length;
603 
604                 if (btusb_recv_intr(data, urb->transfer_buffer,
605                                     urb->actual_length) < 0) {
606                         BT_ERR("%s corrupted event packet", hdev->name);
607                         hdev->stat.err_rx++;
608                 }
609         } else if (urb->status == -ENOENT) {
610                 /* Avoid suspend failed when usb_kill_urb */
611                 return;
612         }
613 
614         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
615                 return;
616 
617         usb_mark_last_busy(data->udev);
618         usb_anchor_urb(urb, &data->intr_anchor);
619 
620         err = usb_submit_urb(urb, GFP_ATOMIC);
621         if (err < 0) {
622                 /* -EPERM: urb is being killed;
623                  * -ENODEV: device got disconnected */
624                 if (err != -EPERM && err != -ENODEV)
625                         BT_ERR("%s urb %p failed to resubmit (%d)",
626                                hdev->name, urb, -err);
627                 usb_unanchor_urb(urb);
628         }
629 }
630 
631 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
632 {
633         struct btusb_data *data = hci_get_drvdata(hdev);
634         struct urb *urb;
635         unsigned char *buf;
636         unsigned int pipe;
637         int err, size;
638 
639         BT_DBG("%s", hdev->name);
640 
641         if (!data->intr_ep)
642                 return -ENODEV;
643 
644         urb = usb_alloc_urb(0, mem_flags);
645         if (!urb)
646                 return -ENOMEM;
647 
648         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
649 
650         buf = kmalloc(size, mem_flags);
651         if (!buf) {
652                 usb_free_urb(urb);
653                 return -ENOMEM;
654         }
655 
656         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
657 
658         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
659                          btusb_intr_complete, hdev, data->intr_ep->bInterval);
660 
661         urb->transfer_flags |= URB_FREE_BUFFER;
662 
663         usb_anchor_urb(urb, &data->intr_anchor);
664 
665         err = usb_submit_urb(urb, mem_flags);
666         if (err < 0) {
667                 if (err != -EPERM && err != -ENODEV)
668                         BT_ERR("%s urb %p submission failed (%d)",
669                                hdev->name, urb, -err);
670                 usb_unanchor_urb(urb);
671         }
672 
673         usb_free_urb(urb);
674 
675         return err;
676 }
677 
678 static void btusb_bulk_complete(struct urb *urb)
679 {
680         struct hci_dev *hdev = urb->context;
681         struct btusb_data *data = hci_get_drvdata(hdev);
682         int err;
683 
684         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
685                urb->actual_length);
686 
687         if (!test_bit(HCI_RUNNING, &hdev->flags))
688                 return;
689 
690         if (urb->status == 0) {
691                 hdev->stat.byte_rx += urb->actual_length;
692 
693                 if (data->recv_bulk(data, urb->transfer_buffer,
694                                     urb->actual_length) < 0) {
695                         BT_ERR("%s corrupted ACL packet", hdev->name);
696                         hdev->stat.err_rx++;
697                 }
698         } else if (urb->status == -ENOENT) {
699                 /* Avoid suspend failed when usb_kill_urb */
700                 return;
701         }
702 
703         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
704                 return;
705 
706         usb_anchor_urb(urb, &data->bulk_anchor);
707         usb_mark_last_busy(data->udev);
708 
709         err = usb_submit_urb(urb, GFP_ATOMIC);
710         if (err < 0) {
711                 /* -EPERM: urb is being killed;
712                  * -ENODEV: device got disconnected */
713                 if (err != -EPERM && err != -ENODEV)
714                         BT_ERR("%s urb %p failed to resubmit (%d)",
715                                hdev->name, urb, -err);
716                 usb_unanchor_urb(urb);
717         }
718 }
719 
720 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
721 {
722         struct btusb_data *data = hci_get_drvdata(hdev);
723         struct urb *urb;
724         unsigned char *buf;
725         unsigned int pipe;
726         int err, size = HCI_MAX_FRAME_SIZE;
727 
728         BT_DBG("%s", hdev->name);
729 
730         if (!data->bulk_rx_ep)
731                 return -ENODEV;
732 
733         urb = usb_alloc_urb(0, mem_flags);
734         if (!urb)
735                 return -ENOMEM;
736 
737         buf = kmalloc(size, mem_flags);
738         if (!buf) {
739                 usb_free_urb(urb);
740                 return -ENOMEM;
741         }
742 
743         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
744 
745         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
746                           btusb_bulk_complete, hdev);
747 
748         urb->transfer_flags |= URB_FREE_BUFFER;
749 
750         usb_mark_last_busy(data->udev);
751         usb_anchor_urb(urb, &data->bulk_anchor);
752 
753         err = usb_submit_urb(urb, mem_flags);
754         if (err < 0) {
755                 if (err != -EPERM && err != -ENODEV)
756                         BT_ERR("%s urb %p submission failed (%d)",
757                                hdev->name, urb, -err);
758                 usb_unanchor_urb(urb);
759         }
760 
761         usb_free_urb(urb);
762 
763         return err;
764 }
765 
766 static void btusb_isoc_complete(struct urb *urb)
767 {
768         struct hci_dev *hdev = urb->context;
769         struct btusb_data *data = hci_get_drvdata(hdev);
770         int i, err;
771 
772         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
773                urb->actual_length);
774 
775         if (!test_bit(HCI_RUNNING, &hdev->flags))
776                 return;
777 
778         if (urb->status == 0) {
779                 for (i = 0; i < urb->number_of_packets; i++) {
780                         unsigned int offset = urb->iso_frame_desc[i].offset;
781                         unsigned int length = urb->iso_frame_desc[i].actual_length;
782 
783                         if (urb->iso_frame_desc[i].status)
784                                 continue;
785 
786                         hdev->stat.byte_rx += length;
787 
788                         if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
789                                             length) < 0) {
790                                 BT_ERR("%s corrupted SCO packet", hdev->name);
791                                 hdev->stat.err_rx++;
792                         }
793                 }
794         } else if (urb->status == -ENOENT) {
795                 /* Avoid suspend failed when usb_kill_urb */
796                 return;
797         }
798 
799         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
800                 return;
801 
802         usb_anchor_urb(urb, &data->isoc_anchor);
803 
804         err = usb_submit_urb(urb, GFP_ATOMIC);
805         if (err < 0) {
806                 /* -EPERM: urb is being killed;
807                  * -ENODEV: device got disconnected */
808                 if (err != -EPERM && err != -ENODEV)
809                         BT_ERR("%s urb %p failed to resubmit (%d)",
810                                hdev->name, urb, -err);
811                 usb_unanchor_urb(urb);
812         }
813 }
814 
815 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
816 {
817         int i, offset = 0;
818 
819         BT_DBG("len %d mtu %d", len, mtu);
820 
821         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
822                                         i++, offset += mtu, len -= mtu) {
823                 urb->iso_frame_desc[i].offset = offset;
824                 urb->iso_frame_desc[i].length = mtu;
825         }
826 
827         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
828                 urb->iso_frame_desc[i].offset = offset;
829                 urb->iso_frame_desc[i].length = len;
830                 i++;
831         }
832 
833         urb->number_of_packets = i;
834 }
835 
836 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
837 {
838         struct btusb_data *data = hci_get_drvdata(hdev);
839         struct urb *urb;
840         unsigned char *buf;
841         unsigned int pipe;
842         int err, size;
843 
844         BT_DBG("%s", hdev->name);
845 
846         if (!data->isoc_rx_ep)
847                 return -ENODEV;
848 
849         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
850         if (!urb)
851                 return -ENOMEM;
852 
853         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
854                                                 BTUSB_MAX_ISOC_FRAMES;
855 
856         buf = kmalloc(size, mem_flags);
857         if (!buf) {
858                 usb_free_urb(urb);
859                 return -ENOMEM;
860         }
861 
862         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
863 
864         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
865                          hdev, data->isoc_rx_ep->bInterval);
866 
867         urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
868 
869         __fill_isoc_descriptor(urb, size,
870                                le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
871 
872         usb_anchor_urb(urb, &data->isoc_anchor);
873 
874         err = usb_submit_urb(urb, mem_flags);
875         if (err < 0) {
876                 if (err != -EPERM && err != -ENODEV)
877                         BT_ERR("%s urb %p submission failed (%d)",
878                                hdev->name, urb, -err);
879                 usb_unanchor_urb(urb);
880         }
881 
882         usb_free_urb(urb);
883 
884         return err;
885 }
886 
887 static void btusb_diag_complete(struct urb *urb)
888 {
889         struct hci_dev *hdev = urb->context;
890         struct btusb_data *data = hci_get_drvdata(hdev);
891         int err;
892 
893         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
894                urb->actual_length);
895 
896         if (urb->status == 0) {
897                 struct sk_buff *skb;
898 
899                 skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
900                 if (skb) {
901                         memcpy(skb_put(skb, urb->actual_length),
902                                urb->transfer_buffer, urb->actual_length);
903                         hci_recv_diag(hdev, skb);
904                 }
905         } else if (urb->status == -ENOENT) {
906                 /* Avoid suspend failed when usb_kill_urb */
907                 return;
908         }
909 
910         if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
911                 return;
912 
913         usb_anchor_urb(urb, &data->diag_anchor);
914         usb_mark_last_busy(data->udev);
915 
916         err = usb_submit_urb(urb, GFP_ATOMIC);
917         if (err < 0) {
918                 /* -EPERM: urb is being killed;
919                  * -ENODEV: device got disconnected */
920                 if (err != -EPERM && err != -ENODEV)
921                         BT_ERR("%s urb %p failed to resubmit (%d)",
922                                hdev->name, urb, -err);
923                 usb_unanchor_urb(urb);
924         }
925 }
926 
927 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
928 {
929         struct btusb_data *data = hci_get_drvdata(hdev);
930         struct urb *urb;
931         unsigned char *buf;
932         unsigned int pipe;
933         int err, size = HCI_MAX_FRAME_SIZE;
934 
935         BT_DBG("%s", hdev->name);
936 
937         if (!data->diag_rx_ep)
938                 return -ENODEV;
939 
940         urb = usb_alloc_urb(0, mem_flags);
941         if (!urb)
942                 return -ENOMEM;
943 
944         buf = kmalloc(size, mem_flags);
945         if (!buf) {
946                 usb_free_urb(urb);
947                 return -ENOMEM;
948         }
949 
950         pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
951 
952         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
953                           btusb_diag_complete, hdev);
954 
955         urb->transfer_flags |= URB_FREE_BUFFER;
956 
957         usb_mark_last_busy(data->udev);
958         usb_anchor_urb(urb, &data->diag_anchor);
959 
960         err = usb_submit_urb(urb, mem_flags);
961         if (err < 0) {
962                 if (err != -EPERM && err != -ENODEV)
963                         BT_ERR("%s urb %p submission failed (%d)",
964                                hdev->name, urb, -err);
965                 usb_unanchor_urb(urb);
966         }
967 
968         usb_free_urb(urb);
969 
970         return err;
971 }
972 
973 static void btusb_tx_complete(struct urb *urb)
974 {
975         struct sk_buff *skb = urb->context;
976         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
977         struct btusb_data *data = hci_get_drvdata(hdev);
978 
979         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
980                urb->actual_length);
981 
982         if (!test_bit(HCI_RUNNING, &hdev->flags))
983                 goto done;
984 
985         if (!urb->status)
986                 hdev->stat.byte_tx += urb->transfer_buffer_length;
987         else
988                 hdev->stat.err_tx++;
989 
990 done:
991         spin_lock(&data->txlock);
992         data->tx_in_flight--;
993         spin_unlock(&data->txlock);
994 
995         kfree(urb->setup_packet);
996 
997         kfree_skb(skb);
998 }
999 
1000 static void btusb_isoc_tx_complete(struct urb *urb)
1001 {
1002         struct sk_buff *skb = urb->context;
1003         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1004 
1005         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1006                urb->actual_length);
1007 
1008         if (!test_bit(HCI_RUNNING, &hdev->flags))
1009                 goto done;
1010 
1011         if (!urb->status)
1012                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1013         else
1014                 hdev->stat.err_tx++;
1015 
1016 done:
1017         kfree(urb->setup_packet);
1018 
1019         kfree_skb(skb);
1020 }
1021 
1022 static int btusb_open(struct hci_dev *hdev)
1023 {
1024         struct btusb_data *data = hci_get_drvdata(hdev);
1025         int err;
1026 
1027         BT_DBG("%s", hdev->name);
1028 
1029         /* Patching USB firmware files prior to starting any URBs of HCI path
1030          * It is more safe to use USB bulk channel for downloading USB patch
1031          */
1032         if (data->setup_on_usb) {
1033                 err = data->setup_on_usb(hdev);
1034                 if (err < 0)
1035                         return err;
1036         }
1037 
1038         err = usb_autopm_get_interface(data->intf);
1039         if (err < 0)
1040                 return err;
1041 
1042         data->intf->needs_remote_wakeup = 1;
1043 
1044         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1045                 goto done;
1046 
1047         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1048         if (err < 0)
1049                 goto failed;
1050 
1051         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1052         if (err < 0) {
1053                 usb_kill_anchored_urbs(&data->intr_anchor);
1054                 goto failed;
1055         }
1056 
1057         set_bit(BTUSB_BULK_RUNNING, &data->flags);
1058         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1059 
1060         if (data->diag) {
1061                 if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1062                         set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1063         }
1064 
1065 done:
1066         usb_autopm_put_interface(data->intf);
1067         return 0;
1068 
1069 failed:
1070         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1071         usb_autopm_put_interface(data->intf);
1072         return err;
1073 }
1074 
1075 static void btusb_stop_traffic(struct btusb_data *data)
1076 {
1077         usb_kill_anchored_urbs(&data->intr_anchor);
1078         usb_kill_anchored_urbs(&data->bulk_anchor);
1079         usb_kill_anchored_urbs(&data->isoc_anchor);
1080         usb_kill_anchored_urbs(&data->diag_anchor);
1081 }
1082 
1083 static int btusb_close(struct hci_dev *hdev)
1084 {
1085         struct btusb_data *data = hci_get_drvdata(hdev);
1086         int err;
1087 
1088         BT_DBG("%s", hdev->name);
1089 
1090         cancel_work_sync(&data->work);
1091         cancel_work_sync(&data->waker);
1092 
1093         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1094         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1095         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1096         clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1097 
1098         btusb_stop_traffic(data);
1099         btusb_free_frags(data);
1100 
1101         err = usb_autopm_get_interface(data->intf);
1102         if (err < 0)
1103                 goto failed;
1104 
1105         data->intf->needs_remote_wakeup = 0;
1106         usb_autopm_put_interface(data->intf);
1107 
1108 failed:
1109         usb_scuttle_anchored_urbs(&data->deferred);
1110         return 0;
1111 }
1112 
1113 static int btusb_flush(struct hci_dev *hdev)
1114 {
1115         struct btusb_data *data = hci_get_drvdata(hdev);
1116 
1117         BT_DBG("%s", hdev->name);
1118 
1119         usb_kill_anchored_urbs(&data->tx_anchor);
1120         btusb_free_frags(data);
1121 
1122         return 0;
1123 }
1124 
1125 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1126 {
1127         struct btusb_data *data = hci_get_drvdata(hdev);
1128         struct usb_ctrlrequest *dr;
1129         struct urb *urb;
1130         unsigned int pipe;
1131 
1132         urb = usb_alloc_urb(0, GFP_KERNEL);
1133         if (!urb)
1134                 return ERR_PTR(-ENOMEM);
1135 
1136         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1137         if (!dr) {
1138                 usb_free_urb(urb);
1139                 return ERR_PTR(-ENOMEM);
1140         }
1141 
1142         dr->bRequestType = data->cmdreq_type;
1143         dr->bRequest     = data->cmdreq;
1144         dr->wIndex       = 0;
1145         dr->wValue       = 0;
1146         dr->wLength      = __cpu_to_le16(skb->len);
1147 
1148         pipe = usb_sndctrlpipe(data->udev, 0x00);
1149 
1150         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1151                              skb->data, skb->len, btusb_tx_complete, skb);
1152 
1153         skb->dev = (void *)hdev;
1154 
1155         return urb;
1156 }
1157 
1158 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1159 {
1160         struct btusb_data *data = hci_get_drvdata(hdev);
1161         struct urb *urb;
1162         unsigned int pipe;
1163 
1164         if (!data->bulk_tx_ep)
1165                 return ERR_PTR(-ENODEV);
1166 
1167         urb = usb_alloc_urb(0, GFP_KERNEL);
1168         if (!urb)
1169                 return ERR_PTR(-ENOMEM);
1170 
1171         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1172 
1173         usb_fill_bulk_urb(urb, data->udev, pipe,
1174                           skb->data, skb->len, btusb_tx_complete, skb);
1175 
1176         skb->dev = (void *)hdev;
1177 
1178         return urb;
1179 }
1180 
1181 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1182 {
1183         struct btusb_data *data = hci_get_drvdata(hdev);
1184         struct urb *urb;
1185         unsigned int pipe;
1186 
1187         if (!data->isoc_tx_ep)
1188                 return ERR_PTR(-ENODEV);
1189 
1190         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1191         if (!urb)
1192                 return ERR_PTR(-ENOMEM);
1193 
1194         pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1195 
1196         usb_fill_int_urb(urb, data->udev, pipe,
1197                          skb->data, skb->len, btusb_isoc_tx_complete,
1198                          skb, data->isoc_tx_ep->bInterval);
1199 
1200         urb->transfer_flags  = URB_ISO_ASAP;
1201 
1202         __fill_isoc_descriptor(urb, skb->len,
1203                                le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1204 
1205         skb->dev = (void *)hdev;
1206 
1207         return urb;
1208 }
1209 
1210 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1211 {
1212         struct btusb_data *data = hci_get_drvdata(hdev);
1213         int err;
1214 
1215         usb_anchor_urb(urb, &data->tx_anchor);
1216 
1217         err = usb_submit_urb(urb, GFP_KERNEL);
1218         if (err < 0) {
1219                 if (err != -EPERM && err != -ENODEV)
1220                         BT_ERR("%s urb %p submission failed (%d)",
1221                                hdev->name, urb, -err);
1222                 kfree(urb->setup_packet);
1223                 usb_unanchor_urb(urb);
1224         } else {
1225                 usb_mark_last_busy(data->udev);
1226         }
1227 
1228         usb_free_urb(urb);
1229         return err;
1230 }
1231 
1232 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1233 {
1234         struct btusb_data *data = hci_get_drvdata(hdev);
1235         unsigned long flags;
1236         bool suspending;
1237 
1238         spin_lock_irqsave(&data->txlock, flags);
1239         suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1240         if (!suspending)
1241                 data->tx_in_flight++;
1242         spin_unlock_irqrestore(&data->txlock, flags);
1243 
1244         if (!suspending)
1245                 return submit_tx_urb(hdev, urb);
1246 
1247         usb_anchor_urb(urb, &data->deferred);
1248         schedule_work(&data->waker);
1249 
1250         usb_free_urb(urb);
1251         return 0;
1252 }
1253 
1254 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1255 {
1256         struct urb *urb;
1257 
1258         BT_DBG("%s", hdev->name);
1259 
1260         switch (bt_cb(skb)->pkt_type) {
1261         case HCI_COMMAND_PKT:
1262                 urb = alloc_ctrl_urb(hdev, skb);
1263                 if (IS_ERR(urb))
1264                         return PTR_ERR(urb);
1265 
1266                 hdev->stat.cmd_tx++;
1267                 return submit_or_queue_tx_urb(hdev, urb);
1268 
1269         case HCI_ACLDATA_PKT:
1270                 urb = alloc_bulk_urb(hdev, skb);
1271                 if (IS_ERR(urb))
1272                         return PTR_ERR(urb);
1273 
1274                 hdev->stat.acl_tx++;
1275                 return submit_or_queue_tx_urb(hdev, urb);
1276 
1277         case HCI_SCODATA_PKT:
1278                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1279                         return -ENODEV;
1280 
1281                 urb = alloc_isoc_urb(hdev, skb);
1282                 if (IS_ERR(urb))
1283                         return PTR_ERR(urb);
1284 
1285                 hdev->stat.sco_tx++;
1286                 return submit_tx_urb(hdev, urb);
1287         }
1288 
1289         return -EILSEQ;
1290 }
1291 
1292 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1293 {
1294         struct btusb_data *data = hci_get_drvdata(hdev);
1295 
1296         BT_DBG("%s evt %d", hdev->name, evt);
1297 
1298         if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1299                 data->sco_num = hci_conn_num(hdev, SCO_LINK);
1300                 schedule_work(&data->work);
1301         }
1302 }
1303 
1304 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1305 {
1306         struct btusb_data *data = hci_get_drvdata(hdev);
1307         struct usb_interface *intf = data->isoc;
1308         struct usb_endpoint_descriptor *ep_desc;
1309         int i, err;
1310 
1311         if (!data->isoc)
1312                 return -ENODEV;
1313 
1314         err = usb_set_interface(data->udev, 1, altsetting);
1315         if (err < 0) {
1316                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
1317                 return err;
1318         }
1319 
1320         data->isoc_altsetting = altsetting;
1321 
1322         data->isoc_tx_ep = NULL;
1323         data->isoc_rx_ep = NULL;
1324 
1325         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1326                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1327 
1328                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1329                         data->isoc_tx_ep = ep_desc;
1330                         continue;
1331                 }
1332 
1333                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1334                         data->isoc_rx_ep = ep_desc;
1335                         continue;
1336                 }
1337         }
1338 
1339         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1340                 BT_ERR("%s invalid SCO descriptors", hdev->name);
1341                 return -ENODEV;
1342         }
1343 
1344         return 0;
1345 }
1346 
1347 static void btusb_work(struct work_struct *work)
1348 {
1349         struct btusb_data *data = container_of(work, struct btusb_data, work);
1350         struct hci_dev *hdev = data->hdev;
1351         int new_alts;
1352         int err;
1353 
1354         if (data->sco_num > 0) {
1355                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1356                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1357                         if (err < 0) {
1358                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1359                                 usb_kill_anchored_urbs(&data->isoc_anchor);
1360                                 return;
1361                         }
1362 
1363                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1364                 }
1365 
1366                 if (hdev->voice_setting & 0x0020) {
1367                         static const int alts[3] = { 2, 4, 5 };
1368 
1369                         new_alts = alts[data->sco_num - 1];
1370                 } else {
1371                         new_alts = data->sco_num;
1372                 }
1373 
1374                 if (data->isoc_altsetting != new_alts) {
1375                         unsigned long flags;
1376 
1377                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1378                         usb_kill_anchored_urbs(&data->isoc_anchor);
1379 
1380                         /* When isochronous alternate setting needs to be
1381                          * changed, because SCO connection has been added
1382                          * or removed, a packet fragment may be left in the
1383                          * reassembling state. This could lead to wrongly
1384                          * assembled fragments.
1385                          *
1386                          * Clear outstanding fragment when selecting a new
1387                          * alternate setting.
1388                          */
1389                         spin_lock_irqsave(&data->rxlock, flags);
1390                         kfree_skb(data->sco_skb);
1391                         data->sco_skb = NULL;
1392                         spin_unlock_irqrestore(&data->rxlock, flags);
1393 
1394                         if (__set_isoc_interface(hdev, new_alts) < 0)
1395                                 return;
1396                 }
1397 
1398                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1399                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1400                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1401                         else
1402                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1403                 }
1404         } else {
1405                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1406                 usb_kill_anchored_urbs(&data->isoc_anchor);
1407 
1408                 __set_isoc_interface(hdev, 0);
1409                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1410                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1411         }
1412 }
1413 
1414 static void btusb_waker(struct work_struct *work)
1415 {
1416         struct btusb_data *data = container_of(work, struct btusb_data, waker);
1417         int err;
1418 
1419         err = usb_autopm_get_interface(data->intf);
1420         if (err < 0)
1421                 return;
1422 
1423         usb_autopm_put_interface(data->intf);
1424 }
1425 
1426 static int btusb_setup_bcm92035(struct hci_dev *hdev)
1427 {
1428         struct sk_buff *skb;
1429         u8 val = 0x00;
1430 
1431         BT_DBG("%s", hdev->name);
1432 
1433         skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
1434         if (IS_ERR(skb))
1435                 BT_ERR("BCM92035 command failed (%ld)", -PTR_ERR(skb));
1436         else
1437                 kfree_skb(skb);
1438 
1439         return 0;
1440 }
1441 
1442 static int btusb_setup_csr(struct hci_dev *hdev)
1443 {
1444         struct hci_rp_read_local_version *rp;
1445         struct sk_buff *skb;
1446 
1447         BT_DBG("%s", hdev->name);
1448 
1449         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
1450                              HCI_INIT_TIMEOUT);
1451         if (IS_ERR(skb)) {
1452                 int err = PTR_ERR(skb);
1453                 BT_ERR("%s: CSR: Local version failed (%d)", hdev->name, err);
1454                 return err;
1455         }
1456 
1457         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
1458                 BT_ERR("%s: CSR: Local version length mismatch", hdev->name);
1459                 kfree_skb(skb);
1460                 return -EIO;
1461         }
1462 
1463         rp = (struct hci_rp_read_local_version *)skb->data;
1464 
1465         /* Detect controllers which aren't real CSR ones. */
1466         if (le16_to_cpu(rp->manufacturer) != 10 ||
1467             le16_to_cpu(rp->lmp_subver) == 0x0c5c) {
1468                 /* Clear the reset quirk since this is not an actual
1469                  * early Bluetooth 1.1 device from CSR.
1470                  */
1471                 clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1472 
1473                 /* These fake CSR controllers have all a broken
1474                  * stored link key handling and so just disable it.
1475                  */
1476                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
1477         }
1478 
1479         kfree_skb(skb);
1480 
1481         return 0;
1482 }
1483 
1484 static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
1485                                                        struct intel_version *ver)
1486 {
1487         const struct firmware *fw;
1488         char fwname[64];
1489         int ret;
1490 
1491         snprintf(fwname, sizeof(fwname),
1492                  "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
1493                  ver->hw_platform, ver->hw_variant, ver->hw_revision,
1494                  ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
1495                  ver->fw_build_ww, ver->fw_build_yy);
1496 
1497         ret = request_firmware(&fw, fwname, &hdev->dev);
1498         if (ret < 0) {
1499                 if (ret == -EINVAL) {
1500                         BT_ERR("%s Intel firmware file request failed (%d)",
1501                                hdev->name, ret);
1502                         return NULL;
1503                 }
1504 
1505                 BT_ERR("%s failed to open Intel firmware file: %s(%d)",
1506                        hdev->name, fwname, ret);
1507 
1508                 /* If the correct firmware patch file is not found, use the
1509                  * default firmware patch file instead
1510                  */
1511                 snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
1512                          ver->hw_platform, ver->hw_variant);
1513                 if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
1514                         BT_ERR("%s failed to open default Intel fw file: %s",
1515                                hdev->name, fwname);
1516                         return NULL;
1517                 }
1518         }
1519 
1520         BT_INFO("%s: Intel Bluetooth firmware file: %s", hdev->name, fwname);
1521 
1522         return fw;
1523 }
1524 
1525 static int btusb_setup_intel_patching(struct hci_dev *hdev,
1526                                       const struct firmware *fw,
1527                                       const u8 **fw_ptr, int *disable_patch)
1528 {
1529         struct sk_buff *skb;
1530         struct hci_command_hdr *cmd;
1531         const u8 *cmd_param;
1532         struct hci_event_hdr *evt = NULL;
1533         const u8 *evt_param = NULL;
1534         int remain = fw->size - (*fw_ptr - fw->data);
1535 
1536         /* The first byte indicates the types of the patch command or event.
1537          * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
1538          * in the current firmware buffer doesn't start with 0x01 or
1539          * the size of remain buffer is smaller than HCI command header,
1540          * the firmware file is corrupted and it should stop the patching
1541          * process.
1542          */
1543         if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
1544                 BT_ERR("%s Intel fw corrupted: invalid cmd read", hdev->name);
1545                 return -EINVAL;
1546         }
1547         (*fw_ptr)++;
1548         remain--;
1549 
1550         cmd = (struct hci_command_hdr *)(*fw_ptr);
1551         *fw_ptr += sizeof(*cmd);
1552         remain -= sizeof(*cmd);
1553 
1554         /* Ensure that the remain firmware data is long enough than the length
1555          * of command parameter. If not, the firmware file is corrupted.
1556          */
1557         if (remain < cmd->plen) {
1558                 BT_ERR("%s Intel fw corrupted: invalid cmd len", hdev->name);
1559                 return -EFAULT;
1560         }
1561 
1562         /* If there is a command that loads a patch in the firmware
1563          * file, then enable the patch upon success, otherwise just
1564          * disable the manufacturer mode, for example patch activation
1565          * is not required when the default firmware patch file is used
1566          * because there are no patch data to load.
1567          */
1568         if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
1569                 *disable_patch = 0;
1570 
1571         cmd_param = *fw_ptr;
1572         *fw_ptr += cmd->plen;
1573         remain -= cmd->plen;
1574 
1575         /* This reads the expected events when the above command is sent to the
1576          * device. Some vendor commands expects more than one events, for
1577          * example command status event followed by vendor specific event.
1578          * For this case, it only keeps the last expected event. so the command
1579          * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
1580          * last expected event.
1581          */
1582         while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
1583                 (*fw_ptr)++;
1584                 remain--;
1585 
1586                 evt = (struct hci_event_hdr *)(*fw_ptr);
1587                 *fw_ptr += sizeof(*evt);
1588                 remain -= sizeof(*evt);
1589 
1590                 if (remain < evt->plen) {
1591                         BT_ERR("%s Intel fw corrupted: invalid evt len",
1592                                hdev->name);
1593                         return -EFAULT;
1594                 }
1595 
1596                 evt_param = *fw_ptr;
1597                 *fw_ptr += evt->plen;
1598                 remain -= evt->plen;
1599         }
1600 
1601         /* Every HCI commands in the firmware file has its correspond event.
1602          * If event is not found or remain is smaller than zero, the firmware
1603          * file is corrupted.
1604          */
1605         if (!evt || !evt_param || remain < 0) {
1606                 BT_ERR("%s Intel fw corrupted: invalid evt read", hdev->name);
1607                 return -EFAULT;
1608         }
1609 
1610         skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
1611                                 cmd_param, evt->evt, HCI_INIT_TIMEOUT);
1612         if (IS_ERR(skb)) {
1613                 BT_ERR("%s sending Intel patch command (0x%4.4x) failed (%ld)",
1614                        hdev->name, cmd->opcode, PTR_ERR(skb));
1615                 return PTR_ERR(skb);
1616         }
1617 
1618         /* It ensures that the returned event matches the event data read from
1619          * the firmware file. At fist, it checks the length and then
1620          * the contents of the event.
1621          */
1622         if (skb->len != evt->plen) {
1623                 BT_ERR("%s mismatch event length (opcode 0x%4.4x)", hdev->name,
1624                        le16_to_cpu(cmd->opcode));
1625                 kfree_skb(skb);
1626                 return -EFAULT;
1627         }
1628 
1629         if (memcmp(skb->data, evt_param, evt->plen)) {
1630                 BT_ERR("%s mismatch event parameter (opcode 0x%4.4x)",
1631                        hdev->name, le16_to_cpu(cmd->opcode));
1632                 kfree_skb(skb);
1633                 return -EFAULT;
1634         }
1635         kfree_skb(skb);
1636 
1637         return 0;
1638 }
1639 
1640 static int btusb_setup_intel(struct hci_dev *hdev)
1641 {
1642         struct sk_buff *skb;
1643         const struct firmware *fw;
1644         const u8 *fw_ptr;
1645         int disable_patch;
1646         struct intel_version *ver;
1647 
1648         const u8 mfg_enable[] = { 0x01, 0x00 };
1649         const u8 mfg_disable[] = { 0x00, 0x00 };
1650         const u8 mfg_reset_deactivate[] = { 0x00, 0x01 };
1651         const u8 mfg_reset_activate[] = { 0x00, 0x02 };
1652 
1653         BT_DBG("%s", hdev->name);
1654 
1655         /* The controller has a bug with the first HCI command sent to it
1656          * returning number of completed commands as zero. This would stall the
1657          * command processing in the Bluetooth core.
1658          *
1659          * As a workaround, send HCI Reset command first which will reset the
1660          * number of completed commands and allow normal command processing
1661          * from now on.
1662          */
1663         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
1664         if (IS_ERR(skb)) {
1665                 BT_ERR("%s sending initial HCI reset command failed (%ld)",
1666                        hdev->name, PTR_ERR(skb));
1667                 return PTR_ERR(skb);
1668         }
1669         kfree_skb(skb);
1670 
1671         /* Read Intel specific controller version first to allow selection of
1672          * which firmware file to load.
1673          *
1674          * The returned information are hardware variant and revision plus
1675          * firmware variant, revision and build number.
1676          */
1677         skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
1678         if (IS_ERR(skb)) {
1679                 BT_ERR("%s reading Intel fw version command failed (%ld)",
1680                        hdev->name, PTR_ERR(skb));
1681                 return PTR_ERR(skb);
1682         }
1683 
1684         if (skb->len != sizeof(*ver)) {
1685                 BT_ERR("%s Intel version event length mismatch", hdev->name);
1686                 kfree_skb(skb);
1687                 return -EIO;
1688         }
1689 
1690         ver = (struct intel_version *)skb->data;
1691 
1692         BT_INFO("%s: read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
1693                 hdev->name, ver->hw_platform, ver->hw_variant,
1694                 ver->hw_revision, ver->fw_variant,  ver->fw_revision,
1695                 ver->fw_build_num, ver->fw_build_ww, ver->fw_build_yy,
1696                 ver->fw_patch_num);
1697 
1698         /* fw_patch_num indicates the version of patch the device currently
1699          * have. If there is no patch data in the device, it is always 0x00.
1700          * So, if it is other than 0x00, no need to patch the device again.
1701          */
1702         if (ver->fw_patch_num) {
1703                 BT_INFO("%s: Intel device is already patched. patch num: %02x",
1704                         hdev->name, ver->fw_patch_num);
1705                 kfree_skb(skb);
1706                 goto complete;
1707         }
1708 
1709         /* Opens the firmware patch file based on the firmware version read
1710          * from the controller. If it fails to open the matching firmware
1711          * patch file, it tries to open the default firmware patch file.
1712          * If no patch file is found, allow the device to operate without
1713          * a patch.
1714          */
1715         fw = btusb_setup_intel_get_fw(hdev, ver);
1716         if (!fw) {
1717                 kfree_skb(skb);
1718                 goto complete;
1719         }
1720         fw_ptr = fw->data;
1721 
1722         kfree_skb(skb);
1723 
1724         /* This Intel specific command enables the manufacturer mode of the
1725          * controller.
1726          *
1727          * Only while this mode is enabled, the driver can download the
1728          * firmware patch data and configuration parameters.
1729          */
1730         skb = __hci_cmd_sync(hdev, 0xfc11, 2, mfg_enable, HCI_INIT_TIMEOUT);
1731         if (IS_ERR(skb)) {
1732                 BT_ERR("%s entering Intel manufacturer mode failed (%ld)",
1733                        hdev->name, PTR_ERR(skb));
1734                 release_firmware(fw);
1735                 return PTR_ERR(skb);
1736         }
1737 
1738         kfree_skb(skb);
1739 
1740         disable_patch = 1;
1741 
1742         /* The firmware data file consists of list of Intel specific HCI
1743          * commands and its expected events. The first byte indicates the
1744          * type of the message, either HCI command or HCI event.
1745          *
1746          * It reads the command and its expected event from the firmware file,
1747          * and send to the controller. Once __hci_cmd_sync_ev() returns,
1748          * the returned event is compared with the event read from the firmware
1749          * file and it will continue until all the messages are downloaded to
1750          * the controller.
1751          *
1752          * Once the firmware patching is completed successfully,
1753          * the manufacturer mode is disabled with reset and activating the
1754          * downloaded patch.
1755          *
1756          * If the firmware patching fails, the manufacturer mode is
1757          * disabled with reset and deactivating the patch.
1758          *
1759          * If the default patch file is used, no reset is done when disabling
1760          * the manufacturer.
1761          */
1762         while (fw->size > fw_ptr - fw->data) {
1763                 int ret;
1764 
1765                 ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
1766                                                  &disable_patch);
1767                 if (ret < 0)
1768                         goto exit_mfg_deactivate;
1769         }
1770 
1771         release_firmware(fw);
1772 
1773         if (disable_patch)
1774                 goto exit_mfg_disable;
1775 
1776         /* Patching completed successfully and disable the manufacturer mode
1777          * with reset and activate the downloaded firmware patches.
1778          */
1779         skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_activate),
1780                              mfg_reset_activate, HCI_INIT_TIMEOUT);
1781         if (IS_ERR(skb)) {
1782                 BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1783                        hdev->name, PTR_ERR(skb));
1784                 return PTR_ERR(skb);
1785         }
1786         kfree_skb(skb);
1787 
1788         BT_INFO("%s: Intel Bluetooth firmware patch completed and activated",
1789                 hdev->name);
1790 
1791         goto complete;
1792 
1793 exit_mfg_disable:
1794         /* Disable the manufacturer mode without reset */
1795         skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_disable), mfg_disable,
1796                              HCI_INIT_TIMEOUT);
1797         if (IS_ERR(skb)) {
1798                 BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1799                        hdev->name, PTR_ERR(skb));
1800                 return PTR_ERR(skb);
1801         }
1802         kfree_skb(skb);
1803 
1804         BT_INFO("%s: Intel Bluetooth firmware patch completed", hdev->name);
1805 
1806         goto complete;
1807 
1808 exit_mfg_deactivate:
1809         release_firmware(fw);
1810 
1811         /* Patching failed. Disable the manufacturer mode with reset and
1812          * deactivate the downloaded firmware patches.
1813          */
1814         skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_deactivate),
1815                              mfg_reset_deactivate, HCI_INIT_TIMEOUT);
1816         if (IS_ERR(skb)) {
1817                 BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1818                        hdev->name, PTR_ERR(skb));
1819                 return PTR_ERR(skb);
1820         }
1821         kfree_skb(skb);
1822 
1823         BT_INFO("%s: Intel Bluetooth firmware patch completed and deactivated",
1824                 hdev->name);
1825 
1826 complete:
1827         /* Set the event mask for Intel specific vendor events. This enables
1828          * a few extra events that are useful during general operation.
1829          */
1830         btintel_set_event_mask_mfg(hdev, false);
1831 
1832         btintel_check_bdaddr(hdev);
1833         return 0;
1834 }
1835 
1836 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
1837 {
1838         struct sk_buff *skb;
1839         struct hci_event_hdr *hdr;
1840         struct hci_ev_cmd_complete *evt;
1841 
1842         skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
1843         if (!skb)
1844                 return -ENOMEM;
1845 
1846         hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr));
1847         hdr->evt = HCI_EV_CMD_COMPLETE;
1848         hdr->plen = sizeof(*evt) + 1;
1849 
1850         evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt));
1851         evt->ncmd = 0x01;
1852         evt->opcode = cpu_to_le16(opcode);
1853 
1854         *skb_put(skb, 1) = 0x00;
1855 
1856         bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
1857 
1858         return hci_recv_frame(hdev, skb);
1859 }
1860 
1861 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
1862                                  int count)
1863 {
1864         /* When the device is in bootloader mode, then it can send
1865          * events via the bulk endpoint. These events are treated the
1866          * same way as the ones received from the interrupt endpoint.
1867          */
1868         if (test_bit(BTUSB_BOOTLOADER, &data->flags))
1869                 return btusb_recv_intr(data, buffer, count);
1870 
1871         return btusb_recv_bulk(data, buffer, count);
1872 }
1873 
1874 static void btusb_intel_bootup(struct btusb_data *data, const void *ptr,
1875                                unsigned int len)
1876 {
1877         const struct intel_bootup *evt = ptr;
1878 
1879         if (len != sizeof(*evt))
1880                 return;
1881 
1882         if (test_and_clear_bit(BTUSB_BOOTING, &data->flags)) {
1883                 smp_mb__after_atomic();
1884                 wake_up_bit(&data->flags, BTUSB_BOOTING);
1885         }
1886 }
1887 
1888 static void btusb_intel_secure_send_result(struct btusb_data *data,
1889                                            const void *ptr, unsigned int len)
1890 {
1891         const struct intel_secure_send_result *evt = ptr;
1892 
1893         if (len != sizeof(*evt))
1894                 return;
1895 
1896         if (evt->result)
1897                 set_bit(BTUSB_FIRMWARE_FAILED, &data->flags);
1898 
1899         if (test_and_clear_bit(BTUSB_DOWNLOADING, &data->flags) &&
1900             test_bit(BTUSB_FIRMWARE_LOADED, &data->flags)) {
1901                 smp_mb__after_atomic();
1902                 wake_up_bit(&data->flags, BTUSB_DOWNLOADING);
1903         }
1904 }
1905 
1906 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
1907 {
1908         struct btusb_data *data = hci_get_drvdata(hdev);
1909 
1910         if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1911                 struct hci_event_hdr *hdr = (void *)skb->data;
1912 
1913                 if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
1914                     hdr->plen > 0) {
1915                         const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
1916                         unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
1917 
1918                         switch (skb->data[2]) {
1919                         case 0x02:
1920                                 /* When switching to the operational firmware
1921                                  * the device sends a vendor specific event
1922                                  * indicating that the bootup completed.
1923                                  */
1924                                 btusb_intel_bootup(data, ptr, len);
1925                                 break;
1926                         case 0x06:
1927                                 /* When the firmware loading completes the
1928                                  * device sends out a vendor specific event
1929                                  * indicating the result of the firmware
1930                                  * loading.
1931                                  */
1932                                 btusb_intel_secure_send_result(data, ptr, len);
1933                                 break;
1934                         }
1935                 }
1936         }
1937 
1938         return hci_recv_frame(hdev, skb);
1939 }
1940 
1941 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
1942 {
1943         struct btusb_data *data = hci_get_drvdata(hdev);
1944         struct urb *urb;
1945 
1946         BT_DBG("%s", hdev->name);
1947 
1948         switch (bt_cb(skb)->pkt_type) {
1949         case HCI_COMMAND_PKT:
1950                 if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1951                         struct hci_command_hdr *cmd = (void *)skb->data;
1952                         __u16 opcode = le16_to_cpu(cmd->opcode);
1953 
1954                         /* When in bootloader mode and the command 0xfc09
1955                          * is received, it needs to be send down the
1956                          * bulk endpoint. So allocate a bulk URB instead.
1957                          */
1958                         if (opcode == 0xfc09)
1959                                 urb = alloc_bulk_urb(hdev, skb);
1960                         else
1961                                 urb = alloc_ctrl_urb(hdev, skb);
1962 
1963                         /* When the 0xfc01 command is issued to boot into
1964                          * the operational firmware, it will actually not
1965                          * send a command complete event. To keep the flow
1966                          * control working inject that event here.
1967                          */
1968                         if (opcode == 0xfc01)
1969                                 inject_cmd_complete(hdev, opcode);
1970                 } else {
1971                         urb = alloc_ctrl_urb(hdev, skb);
1972                 }
1973                 if (IS_ERR(urb))
1974                         return PTR_ERR(urb);
1975 
1976                 hdev->stat.cmd_tx++;
1977                 return submit_or_queue_tx_urb(hdev, urb);
1978 
1979         case HCI_ACLDATA_PKT:
1980                 urb = alloc_bulk_urb(hdev, skb);
1981                 if (IS_ERR(urb))
1982                         return PTR_ERR(urb);
1983 
1984                 hdev->stat.acl_tx++;
1985                 return submit_or_queue_tx_urb(hdev, urb);
1986 
1987         case HCI_SCODATA_PKT:
1988                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1989                         return -ENODEV;
1990 
1991                 urb = alloc_isoc_urb(hdev, skb);
1992                 if (IS_ERR(urb))
1993                         return PTR_ERR(urb);
1994 
1995                 hdev->stat.sco_tx++;
1996                 return submit_tx_urb(hdev, urb);
1997         }
1998 
1999         return -EILSEQ;
2000 }
2001 
2002 static int btusb_setup_intel_new(struct hci_dev *hdev)
2003 {
2004         static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01,
2005                                           0x00, 0x08, 0x04, 0x00 };
2006         struct btusb_data *data = hci_get_drvdata(hdev);
2007         struct sk_buff *skb;
2008         struct intel_version *ver;
2009         struct intel_boot_params *params;
2010         const struct firmware *fw;
2011         const u8 *fw_ptr;
2012         u32 frag_len;
2013         char fwname[64];
2014         ktime_t calltime, delta, rettime;
2015         unsigned long long duration;
2016         int err;
2017 
2018         BT_DBG("%s", hdev->name);
2019 
2020         calltime = ktime_get();
2021 
2022         /* Read the Intel version information to determine if the device
2023          * is in bootloader mode or if it already has operational firmware
2024          * loaded.
2025          */
2026         skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
2027         if (IS_ERR(skb)) {
2028                 BT_ERR("%s: Reading Intel version information failed (%ld)",
2029                        hdev->name, PTR_ERR(skb));
2030                 return PTR_ERR(skb);
2031         }
2032 
2033         if (skb->len != sizeof(*ver)) {
2034                 BT_ERR("%s: Intel version event size mismatch", hdev->name);
2035                 kfree_skb(skb);
2036                 return -EILSEQ;
2037         }
2038 
2039         ver = (struct intel_version *)skb->data;
2040 
2041         /* The hardware platform number has a fixed value of 0x37 and
2042          * for now only accept this single value.
2043          */
2044         if (ver->hw_platform != 0x37) {
2045                 BT_ERR("%s: Unsupported Intel hardware platform (%u)",
2046                        hdev->name, ver->hw_platform);
2047                 kfree_skb(skb);
2048                 return -EINVAL;
2049         }
2050 
2051         /* At the moment only the hardware variant iBT 3.0 (LnP/SfP) is
2052          * supported by this firmware loading method. This check has been
2053          * put in place to ensure correct forward compatibility options
2054          * when newer hardware variants come along.
2055          */
2056         if (ver->hw_variant != 0x0b) {
2057                 BT_ERR("%s: Unsupported Intel hardware variant (%u)",
2058                        hdev->name, ver->hw_variant);
2059                 kfree_skb(skb);
2060                 return -EINVAL;
2061         }
2062 
2063         btintel_version_info(hdev, ver);
2064 
2065         /* The firmware variant determines if the device is in bootloader
2066          * mode or is running operational firmware. The value 0x06 identifies
2067          * the bootloader and the value 0x23 identifies the operational
2068          * firmware.
2069          *
2070          * When the operational firmware is already present, then only
2071          * the check for valid Bluetooth device address is needed. This
2072          * determines if the device will be added as configured or
2073          * unconfigured controller.
2074          *
2075          * It is not possible to use the Secure Boot Parameters in this
2076          * case since that command is only available in bootloader mode.
2077          */
2078         if (ver->fw_variant == 0x23) {
2079                 kfree_skb(skb);
2080                 clear_bit(BTUSB_BOOTLOADER, &data->flags);
2081                 btintel_check_bdaddr(hdev);
2082                 return 0;
2083         }
2084 
2085         /* If the device is not in bootloader mode, then the only possible
2086          * choice is to return an error and abort the device initialization.
2087          */
2088         if (ver->fw_variant != 0x06) {
2089                 BT_ERR("%s: Unsupported Intel firmware variant (%u)",
2090                        hdev->name, ver->fw_variant);
2091                 kfree_skb(skb);
2092                 return -ENODEV;
2093         }
2094 
2095         kfree_skb(skb);
2096 
2097         /* Read the secure boot parameters to identify the operating
2098          * details of the bootloader.
2099          */
2100         skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
2101         if (IS_ERR(skb)) {
2102                 BT_ERR("%s: Reading Intel boot parameters failed (%ld)",
2103                        hdev->name, PTR_ERR(skb));
2104                 return PTR_ERR(skb);
2105         }
2106 
2107         if (skb->len != sizeof(*params)) {
2108                 BT_ERR("%s: Intel boot parameters size mismatch", hdev->name);
2109                 kfree_skb(skb);
2110                 return -EILSEQ;
2111         }
2112 
2113         params = (struct intel_boot_params *)skb->data;
2114 
2115         BT_INFO("%s: Device revision is %u", hdev->name,
2116                 le16_to_cpu(params->dev_revid));
2117 
2118         BT_INFO("%s: Secure boot is %s", hdev->name,
2119                 params->secure_boot ? "enabled" : "disabled");
2120 
2121         BT_INFO("%s: OTP lock is %s", hdev->name,
2122                 params->otp_lock ? "enabled" : "disabled");
2123 
2124         BT_INFO("%s: API lock is %s", hdev->name,
2125                 params->api_lock ? "enabled" : "disabled");
2126 
2127         BT_INFO("%s: Debug lock is %s", hdev->name,
2128                 params->debug_lock ? "enabled" : "disabled");
2129 
2130         BT_INFO("%s: Minimum firmware build %u week %u %u", hdev->name,
2131                 params->min_fw_build_nn, params->min_fw_build_cw,
2132                 2000 + params->min_fw_build_yy);
2133 
2134         /* It is required that every single firmware fragment is acknowledged
2135          * with a command complete event. If the boot parameters indicate
2136          * that this bootloader does not send them, then abort the setup.
2137          */
2138         if (params->limited_cce != 0x00) {
2139                 BT_ERR("%s: Unsupported Intel firmware loading method (%u)",
2140                        hdev->name, params->limited_cce);
2141                 kfree_skb(skb);
2142                 return -EINVAL;
2143         }
2144 
2145         /* If the OTP has no valid Bluetooth device address, then there will
2146          * also be no valid address for the operational firmware.
2147          */
2148         if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
2149                 BT_INFO("%s: No device address configured", hdev->name);
2150                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
2151         }
2152 
2153         /* With this Intel bootloader only the hardware variant and device
2154          * revision information are used to select the right firmware.
2155          *
2156          * Currently this bootloader support is limited to hardware variant
2157          * iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b).
2158          */
2159         snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi",
2160                  le16_to_cpu(params->dev_revid));
2161 
2162         err = request_firmware(&fw, fwname, &hdev->dev);
2163         if (err < 0) {
2164                 BT_ERR("%s: Failed to load Intel firmware file (%d)",
2165                        hdev->name, err);
2166                 kfree_skb(skb);
2167                 return err;
2168         }
2169 
2170         BT_INFO("%s: Found device firmware: %s", hdev->name, fwname);
2171 
2172         /* Save the DDC file name for later use to apply once the firmware
2173          * downloading is done.
2174          */
2175         snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc",
2176                  le16_to_cpu(params->dev_revid));
2177 
2178         kfree_skb(skb);
2179 
2180         if (fw->size < 644) {
2181                 BT_ERR("%s: Invalid size of firmware file (%zu)",
2182                        hdev->name, fw->size);
2183                 err = -EBADF;
2184                 goto done;
2185         }
2186 
2187         set_bit(BTUSB_DOWNLOADING, &data->flags);
2188 
2189         /* Start the firmware download transaction with the Init fragment
2190          * represented by the 128 bytes of CSS header.
2191          */
2192         err = btintel_secure_send(hdev, 0x00, 128, fw->data);
2193         if (err < 0) {
2194                 BT_ERR("%s: Failed to send firmware header (%d)",
2195                        hdev->name, err);
2196                 goto done;
2197         }
2198 
2199         /* Send the 256 bytes of public key information from the firmware
2200          * as the PKey fragment.
2201          */
2202         err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
2203         if (err < 0) {
2204                 BT_ERR("%s: Failed to send firmware public key (%d)",
2205                        hdev->name, err);
2206                 goto done;
2207         }
2208 
2209         /* Send the 256 bytes of signature information from the firmware
2210          * as the Sign fragment.
2211          */
2212         err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
2213         if (err < 0) {
2214                 BT_ERR("%s: Failed to send firmware signature (%d)",
2215                        hdev->name, err);
2216                 goto done;
2217         }
2218 
2219         fw_ptr = fw->data + 644;
2220         frag_len = 0;
2221 
2222         while (fw_ptr - fw->data < fw->size) {
2223                 struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
2224 
2225                 frag_len += sizeof(*cmd) + cmd->plen;
2226 
2227                 /* The parameter length of the secure send command requires
2228                  * a 4 byte alignment. It happens so that the firmware file
2229                  * contains proper Intel_NOP commands to align the fragments
2230                  * as needed.
2231                  *
2232                  * Send set of commands with 4 byte alignment from the
2233                  * firmware data buffer as a single Data fragement.
2234                  */
2235                 if (!(frag_len % 4)) {
2236                         err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
2237                         if (err < 0) {
2238                                 BT_ERR("%s: Failed to send firmware data (%d)",
2239                                        hdev->name, err);
2240                                 goto done;
2241                         }
2242 
2243                         fw_ptr += frag_len;
2244                         frag_len = 0;
2245                 }
2246         }
2247 
2248         set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
2249 
2250         BT_INFO("%s: Waiting for firmware download to complete", hdev->name);
2251 
2252         /* Before switching the device into operational mode and with that
2253          * booting the loaded firmware, wait for the bootloader notification
2254          * that all fragments have been successfully received.
2255          *
2256          * When the event processing receives the notification, then the
2257          * BTUSB_DOWNLOADING flag will be cleared.
2258          *
2259          * The firmware loading should not take longer than 5 seconds
2260          * and thus just timeout if that happens and fail the setup
2261          * of this device.
2262          */
2263         err = wait_on_bit_timeout(&data->flags, BTUSB_DOWNLOADING,
2264                                   TASK_INTERRUPTIBLE,
2265                                   msecs_to_jiffies(5000));
2266         if (err == 1) {
2267                 BT_ERR("%s: Firmware loading interrupted", hdev->name);
2268                 err = -EINTR;
2269                 goto done;
2270         }
2271 
2272         if (err) {
2273                 BT_ERR("%s: Firmware loading timeout", hdev->name);
2274                 err = -ETIMEDOUT;
2275                 goto done;
2276         }
2277 
2278         if (test_bit(BTUSB_FIRMWARE_FAILED, &data->flags)) {
2279                 BT_ERR("%s: Firmware loading failed", hdev->name);
2280                 err = -ENOEXEC;
2281                 goto done;
2282         }
2283 
2284         rettime = ktime_get();
2285         delta = ktime_sub(rettime, calltime);
2286         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2287 
2288         BT_INFO("%s: Firmware loaded in %llu usecs", hdev->name, duration);
2289 
2290 done:
2291         release_firmware(fw);
2292 
2293         if (err < 0)
2294                 return err;
2295 
2296         calltime = ktime_get();
2297 
2298         set_bit(BTUSB_BOOTING, &data->flags);
2299 
2300         skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(reset_param), reset_param,
2301                              HCI_INIT_TIMEOUT);
2302         if (IS_ERR(skb))
2303                 return PTR_ERR(skb);
2304 
2305         kfree_skb(skb);
2306 
2307         /* The bootloader will not indicate when the device is ready. This
2308          * is done by the operational firmware sending bootup notification.
2309          *
2310          * Booting into operational firmware should not take longer than
2311          * 1 second. However if that happens, then just fail the setup
2312          * since something went wrong.
2313          */
2314         BT_INFO("%s: Waiting for device to boot", hdev->name);
2315 
2316         err = wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,
2317                                   TASK_INTERRUPTIBLE,
2318                                   msecs_to_jiffies(1000));
2319 
2320         if (err == 1) {
2321                 BT_ERR("%s: Device boot interrupted", hdev->name);
2322                 return -EINTR;
2323         }
2324 
2325         if (err) {
2326                 BT_ERR("%s: Device boot timeout", hdev->name);
2327                 return -ETIMEDOUT;
2328         }
2329 
2330         rettime = ktime_get();
2331         delta = ktime_sub(rettime, calltime);
2332         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2333 
2334         BT_INFO("%s: Device booted in %llu usecs", hdev->name, duration);
2335 
2336         clear_bit(BTUSB_BOOTLOADER, &data->flags);
2337 
2338         /* Once the device is running in operational mode, it needs to apply
2339          * the device configuration (DDC) parameters.
2340          *
2341          * The device can work without DDC parameters, so even if it fails
2342          * to load the file, no need to fail the setup.
2343          */
2344         btintel_load_ddc_config(hdev, fwname);
2345 
2346         /* Set the event mask for Intel specific vendor events. This enables
2347          * a few extra events that are useful during general operation. It
2348          * does not enable any debugging related events.
2349          *
2350          * The device will function correctly without these events enabled
2351          * and thus no need to fail the setup.
2352          */
2353         btintel_set_event_mask(hdev, false);
2354 
2355         return 0;
2356 }
2357 
2358 static int btusb_shutdown_intel(struct hci_dev *hdev)
2359 {
2360         struct sk_buff *skb;
2361         long ret;
2362 
2363         /* Some platforms have an issue with BT LED when the interface is
2364          * down or BT radio is turned off, which takes 5 seconds to BT LED
2365          * goes off. This command turns off the BT LED immediately.
2366          */
2367         skb = __hci_cmd_sync(hdev, 0xfc3f, 0, NULL, HCI_INIT_TIMEOUT);
2368         if (IS_ERR(skb)) {
2369                 ret = PTR_ERR(skb);
2370                 BT_ERR("%s: turning off Intel device LED failed (%ld)",
2371                        hdev->name, ret);
2372                 return ret;
2373         }
2374         kfree_skb(skb);
2375 
2376         return 0;
2377 }
2378 
2379 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
2380                                     const bdaddr_t *bdaddr)
2381 {
2382         struct sk_buff *skb;
2383         u8 buf[8];
2384         long ret;
2385 
2386         buf[0] = 0xfe;
2387         buf[1] = sizeof(bdaddr_t);
2388         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
2389 
2390         skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2391         if (IS_ERR(skb)) {
2392                 ret = PTR_ERR(skb);
2393                 BT_ERR("%s: changing Marvell device address failed (%ld)",
2394                        hdev->name, ret);
2395                 return ret;
2396         }
2397         kfree_skb(skb);
2398 
2399         return 0;
2400 }
2401 
2402 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
2403                                     const bdaddr_t *bdaddr)
2404 {
2405         struct sk_buff *skb;
2406         u8 buf[10];
2407         long ret;
2408 
2409         buf[0] = 0x01;
2410         buf[1] = 0x01;
2411         buf[2] = 0x00;
2412         buf[3] = sizeof(bdaddr_t);
2413         memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
2414 
2415         skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2416         if (IS_ERR(skb)) {
2417                 ret = PTR_ERR(skb);
2418                 BT_ERR("%s: Change address command failed (%ld)",
2419                        hdev->name, ret);
2420                 return ret;
2421         }
2422         kfree_skb(skb);
2423 
2424         return 0;
2425 }
2426 
2427 #define QCA_DFU_PACKET_LEN      4096
2428 
2429 #define QCA_GET_TARGET_VERSION  0x09
2430 #define QCA_CHECK_STATUS        0x05
2431 #define QCA_DFU_DOWNLOAD        0x01
2432 
2433 #define QCA_SYSCFG_UPDATED      0x40
2434 #define QCA_PATCH_UPDATED       0x80
2435 #define QCA_DFU_TIMEOUT         3000
2436 
2437 struct qca_version {
2438         __le32  rom_version;
2439         __le32  patch_version;
2440         __le32  ram_version;
2441         __le32  ref_clock;
2442         __u8    reserved[4];
2443 } __packed;
2444 
2445 struct qca_rampatch_version {
2446         __le16  rom_version;
2447         __le16  patch_version;
2448 } __packed;
2449 
2450 struct qca_device_info {
2451         u32     rom_version;
2452         u8      rampatch_hdr;   /* length of header in rampatch */
2453         u8      nvm_hdr;        /* length of header in NVM */
2454         u8      ver_offset;     /* offset of version structure in rampatch */
2455 };
2456 
2457 static const struct qca_device_info qca_devices_table[] = {
2458         { 0x00000100, 20, 4, 10 }, /* Rome 1.0 */
2459         { 0x00000101, 20, 4, 10 }, /* Rome 1.1 */
2460         { 0x00000200, 28, 4, 18 }, /* Rome 2.0 */
2461         { 0x00000201, 28, 4, 18 }, /* Rome 2.1 */
2462         { 0x00000300, 28, 4, 18 }, /* Rome 3.0 */
2463         { 0x00000302, 28, 4, 18 }, /* Rome 3.2 */
2464 };
2465 
2466 static int btusb_qca_send_vendor_req(struct hci_dev *hdev, u8 request,
2467                                      void *data, u16 size)
2468 {
2469         struct btusb_data *btdata = hci_get_drvdata(hdev);
2470         struct usb_device *udev = btdata->udev;
2471         int pipe, err;
2472         u8 *buf;
2473 
2474         buf = kmalloc(size, GFP_KERNEL);
2475         if (!buf)
2476                 return -ENOMEM;
2477 
2478         /* Found some of USB hosts have IOT issues with ours so that we should
2479          * not wait until HCI layer is ready.
2480          */
2481         pipe = usb_rcvctrlpipe(udev, 0);
2482         err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
2483                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
2484         if (err < 0) {
2485                 BT_ERR("%s: Failed to access otp area (%d)", hdev->name, err);
2486                 goto done;
2487         }
2488 
2489         memcpy(data, buf, size);
2490 
2491 done:
2492         kfree(buf);
2493 
2494         return err;
2495 }
2496 
2497 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
2498                                        const struct firmware *firmware,
2499                                        size_t hdr_size)
2500 {
2501         struct btusb_data *btdata = hci_get_drvdata(hdev);
2502         struct usb_device *udev = btdata->udev;
2503         size_t count, size, sent = 0;
2504         int pipe, len, err;
2505         u8 *buf;
2506 
2507         buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
2508         if (!buf)
2509                 return -ENOMEM;
2510 
2511         count = firmware->size;
2512 
2513         size = min_t(size_t, count, hdr_size);
2514         memcpy(buf, firmware->data, size);
2515 
2516         /* USB patches should go down to controller through USB path
2517          * because binary format fits to go down through USB channel.
2518          * USB control path is for patching headers and USB bulk is for
2519          * patch body.
2520          */
2521         pipe = usb_sndctrlpipe(udev, 0);
2522         err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
2523                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
2524         if (err < 0) {
2525                 BT_ERR("%s: Failed to send headers (%d)", hdev->name, err);
2526                 goto done;
2527         }
2528 
2529         sent += size;
2530         count -= size;
2531 
2532         while (count) {
2533                 size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
2534 
2535                 memcpy(buf, firmware->data + sent, size);
2536 
2537                 pipe = usb_sndbulkpipe(udev, 0x02);
2538                 err = usb_bulk_msg(udev, pipe, buf, size, &len,
2539                                    QCA_DFU_TIMEOUT);
2540                 if (err < 0) {
2541                         BT_ERR("%s: Failed to send body at %zd of %zd (%d)",
2542                                hdev->name, sent, firmware->size, err);
2543                         break;
2544                 }
2545 
2546                 if (size != len) {
2547                         BT_ERR("%s: Failed to get bulk buffer", hdev->name);
2548                         err = -EILSEQ;
2549                         break;
2550                 }
2551 
2552                 sent  += size;
2553                 count -= size;
2554         }
2555 
2556 done:
2557         kfree(buf);
2558         return err;
2559 }
2560 
2561 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
2562                                          struct qca_version *ver,
2563                                          const struct qca_device_info *info)
2564 {
2565         struct qca_rampatch_version *rver;
2566         const struct firmware *fw;
2567         u32 ver_rom, ver_patch;
2568         u16 rver_rom, rver_patch;
2569         char fwname[64];
2570         int err;
2571 
2572         ver_rom = le32_to_cpu(ver->rom_version);
2573         ver_patch = le32_to_cpu(ver->patch_version);
2574 
2575         snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
2576 
2577         err = request_firmware(&fw, fwname, &hdev->dev);
2578         if (err) {
2579                 BT_ERR("%s: failed to request rampatch file: %s (%d)",
2580                        hdev->name, fwname, err);
2581                 return err;
2582         }
2583 
2584         BT_INFO("%s: using rampatch file: %s", hdev->name, fwname);
2585 
2586         rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
2587         rver_rom = le16_to_cpu(rver->rom_version);
2588         rver_patch = le16_to_cpu(rver->patch_version);
2589 
2590         BT_INFO("%s: QCA: patch rome 0x%x build 0x%x, firmware rome 0x%x "
2591                 "build 0x%x", hdev->name, rver_rom, rver_patch, ver_rom,
2592                 ver_patch);
2593 
2594         if (rver_rom != ver_rom || rver_patch <= ver_patch) {
2595                 BT_ERR("%s: rampatch file version did not match with firmware",
2596                        hdev->name);
2597                 err = -EINVAL;
2598                 goto done;
2599         }
2600 
2601         err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
2602 
2603 done:
2604         release_firmware(fw);
2605 
2606         return err;
2607 }
2608 
2609 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
2610                                     struct qca_version *ver,
2611                                     const struct qca_device_info *info)
2612 {
2613         const struct firmware *fw;
2614         char fwname[64];
2615         int err;
2616 
2617         snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin",
2618                  le32_to_cpu(ver->rom_version));
2619 
2620         err = request_firmware(&fw, fwname, &hdev->dev);
2621         if (err) {
2622                 BT_ERR("%s: failed to request NVM file: %s (%d)",
2623                        hdev->name, fwname, err);
2624                 return err;
2625         }
2626 
2627         BT_INFO("%s: using NVM file: %s", hdev->name, fwname);
2628 
2629         err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
2630 
2631         release_firmware(fw);
2632 
2633         return err;
2634 }
2635 
2636 static int btusb_setup_qca(struct hci_dev *hdev)
2637 {
2638         const struct qca_device_info *info = NULL;
2639         struct qca_version ver;
2640         u32 ver_rom;
2641         u8 status;
2642         int i, err;
2643 
2644         err = btusb_qca_send_vendor_req(hdev, QCA_GET_TARGET_VERSION, &ver,
2645                                         sizeof(ver));
2646         if (err < 0)
2647                 return err;
2648 
2649         ver_rom = le32_to_cpu(ver.rom_version);
2650         for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
2651                 if (ver_rom == qca_devices_table[i].rom_version)
2652                         info = &qca_devices_table[i];
2653         }
2654         if (!info) {
2655                 BT_ERR("%s: don't support firmware rome 0x%x", hdev->name,
2656                        ver_rom);
2657                 return -ENODEV;
2658         }
2659 
2660         err = btusb_qca_send_vendor_req(hdev, QCA_CHECK_STATUS, &status,
2661                                         sizeof(status));
2662         if (err < 0)
2663                 return err;
2664 
2665         if (!(status & QCA_PATCH_UPDATED)) {
2666                 err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
2667                 if (err < 0)
2668                         return err;
2669         }
2670 
2671         if (!(status & QCA_SYSCFG_UPDATED)) {
2672                 err = btusb_setup_qca_load_nvm(hdev, &ver, info);
2673                 if (err < 0)
2674                         return err;
2675         }
2676 
2677         return 0;
2678 }
2679 
2680 #ifdef CONFIG_BT_HCIBTUSB_BCM
2681 static inline int __set_diag_interface(struct hci_dev *hdev)
2682 {
2683         struct btusb_data *data = hci_get_drvdata(hdev);
2684         struct usb_interface *intf = data->diag;
2685         int i;
2686 
2687         if (!data->diag)
2688                 return -ENODEV;
2689 
2690         data->diag_tx_ep = NULL;
2691         data->diag_rx_ep = NULL;
2692 
2693         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2694                 struct usb_endpoint_descriptor *ep_desc;
2695 
2696                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2697 
2698                 if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
2699                         data->diag_tx_ep = ep_desc;
2700                         continue;
2701                 }
2702 
2703                 if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
2704                         data->diag_rx_ep = ep_desc;
2705                         continue;
2706                 }
2707         }
2708 
2709         if (!data->diag_tx_ep || !data->diag_rx_ep) {
2710                 BT_ERR("%s invalid diagnostic descriptors", hdev->name);
2711                 return -ENODEV;
2712         }
2713 
2714         return 0;
2715 }
2716 
2717 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
2718 {
2719         struct btusb_data *data = hci_get_drvdata(hdev);
2720         struct sk_buff *skb;
2721         struct urb *urb;
2722         unsigned int pipe;
2723 
2724         if (!data->diag_tx_ep)
2725                 return ERR_PTR(-ENODEV);
2726 
2727         urb = usb_alloc_urb(0, GFP_KERNEL);
2728         if (!urb)
2729                 return ERR_PTR(-ENOMEM);
2730 
2731         skb = bt_skb_alloc(2, GFP_KERNEL);
2732         if (!skb) {
2733                 usb_free_urb(urb);
2734                 return ERR_PTR(-ENOMEM);
2735         }
2736 
2737         *skb_put(skb, 1) = 0xf0;
2738         *skb_put(skb, 1) = enable;
2739 
2740         pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
2741 
2742         usb_fill_bulk_urb(urb, data->udev, pipe,
2743                           skb->data, skb->len, btusb_tx_complete, skb);
2744 
2745         skb->dev = (void *)hdev;
2746 
2747         return urb;
2748 }
2749 
2750 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
2751 {
2752         struct btusb_data *data = hci_get_drvdata(hdev);
2753         struct urb *urb;
2754 
2755         if (!data->diag)
2756                 return -ENODEV;
2757 
2758         if (!test_bit(HCI_RUNNING, &hdev->flags))
2759                 return -ENETDOWN;
2760 
2761         urb = alloc_diag_urb(hdev, enable);
2762         if (IS_ERR(urb))
2763                 return PTR_ERR(urb);
2764 
2765         return submit_or_queue_tx_urb(hdev, urb);
2766 }
2767 #endif
2768 
2769 static int btusb_probe(struct usb_interface *intf,
2770                        const struct usb_device_id *id)
2771 {
2772         struct usb_endpoint_descriptor *ep_desc;
2773         struct btusb_data *data;
2774         struct hci_dev *hdev;
2775         unsigned ifnum_base;
2776         int i, err;
2777 
2778         BT_DBG("intf %p id %p", intf, id);
2779 
2780         /* interface numbers are hardcoded in the spec */
2781         if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
2782                 if (!(id->driver_info & BTUSB_IFNUM_2))
2783                         return -ENODEV;
2784                 if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
2785                         return -ENODEV;
2786         }
2787 
2788         ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
2789 
2790         if (!id->driver_info) {
2791                 const struct usb_device_id *match;
2792 
2793                 match = usb_match_id(intf, blacklist_table);
2794                 if (match)
2795                         id = match;
2796         }
2797 
2798         if (id->driver_info == BTUSB_IGNORE)
2799                 return -ENODEV;
2800 
2801         if (id->driver_info & BTUSB_ATH3012) {
2802                 struct usb_device *udev = interface_to_usbdev(intf);
2803 
2804                 /* Old firmware would otherwise let ath3k driver load
2805                  * patch and sysconfig files */
2806                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
2807                         return -ENODEV;
2808         }
2809 
2810         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
2811         if (!data)
2812                 return -ENOMEM;
2813 
2814         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2815                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2816 
2817                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
2818                         data->intr_ep = ep_desc;
2819                         continue;
2820                 }
2821 
2822                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
2823                         data->bulk_tx_ep = ep_desc;
2824                         continue;
2825                 }
2826 
2827                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
2828                         data->bulk_rx_ep = ep_desc;
2829                         continue;
2830                 }
2831         }
2832 
2833         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
2834                 return -ENODEV;
2835 
2836         if (id->driver_info & BTUSB_AMP) {
2837                 data->cmdreq_type = USB_TYPE_CLASS | 0x01;
2838                 data->cmdreq = 0x2b;
2839         } else {
2840                 data->cmdreq_type = USB_TYPE_CLASS;
2841                 data->cmdreq = 0x00;
2842         }
2843 
2844         data->udev = interface_to_usbdev(intf);
2845         data->intf = intf;
2846 
2847         INIT_WORK(&data->work, btusb_work);
2848         INIT_WORK(&data->waker, btusb_waker);
2849         init_usb_anchor(&data->deferred);
2850         init_usb_anchor(&data->tx_anchor);
2851         spin_lock_init(&data->txlock);
2852 
2853         init_usb_anchor(&data->intr_anchor);
2854         init_usb_anchor(&data->bulk_anchor);
2855         init_usb_anchor(&data->isoc_anchor);
2856         init_usb_anchor(&data->diag_anchor);
2857         spin_lock_init(&data->rxlock);
2858 
2859         if (id->driver_info & BTUSB_INTEL_NEW) {
2860                 data->recv_event = btusb_recv_event_intel;
2861                 data->recv_bulk = btusb_recv_bulk_intel;
2862                 set_bit(BTUSB_BOOTLOADER, &data->flags);
2863         } else {
2864                 data->recv_event = hci_recv_frame;
2865                 data->recv_bulk = btusb_recv_bulk;
2866         }
2867 
2868         hdev = hci_alloc_dev();
2869         if (!hdev)
2870                 return -ENOMEM;
2871 
2872         hdev->bus = HCI_USB;
2873         hci_set_drvdata(hdev, data);
2874 
2875         if (id->driver_info & BTUSB_AMP)
2876                 hdev->dev_type = HCI_AMP;
2877         else
2878                 hdev->dev_type = HCI_BREDR;
2879 
2880         data->hdev = hdev;
2881 
2882         SET_HCIDEV_DEV(hdev, &intf->dev);
2883 
2884         hdev->open   = btusb_open;
2885         hdev->close  = btusb_close;
2886         hdev->flush  = btusb_flush;
2887         hdev->send   = btusb_send_frame;
2888         hdev->notify = btusb_notify;
2889 
2890         if (id->driver_info & BTUSB_BCM2045)
2891                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
2892 
2893         if (id->driver_info & BTUSB_BCM92035)
2894                 hdev->setup = btusb_setup_bcm92035;
2895 
2896 #ifdef CONFIG_BT_HCIBTUSB_BCM
2897         if (id->driver_info & BTUSB_BCM_PATCHRAM) {
2898                 hdev->manufacturer = 15;
2899                 hdev->setup = btbcm_setup_patchram;
2900                 hdev->set_diag = btusb_bcm_set_diag;
2901                 hdev->set_bdaddr = btbcm_set_bdaddr;
2902 
2903                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
2904                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
2905         }
2906 
2907         if (id->driver_info & BTUSB_BCM_APPLE) {
2908                 hdev->manufacturer = 15;
2909                 hdev->setup = btbcm_setup_apple;
2910                 hdev->set_diag = btusb_bcm_set_diag;
2911 
2912                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
2913                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
2914         }
2915 #endif
2916 
2917         if (id->driver_info & BTUSB_INTEL) {
2918                 hdev->manufacturer = 2;
2919                 hdev->setup = btusb_setup_intel;
2920                 hdev->shutdown = btusb_shutdown_intel;
2921                 hdev->set_diag = btintel_set_diag_mfg;
2922                 hdev->set_bdaddr = btintel_set_bdaddr;
2923                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2924                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2925                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
2926         }
2927 
2928         if (id->driver_info & BTUSB_INTEL_NEW) {
2929                 hdev->manufacturer = 2;
2930                 hdev->send = btusb_send_frame_intel;
2931                 hdev->setup = btusb_setup_intel_new;
2932                 hdev->hw_error = btintel_hw_error;
2933                 hdev->set_diag = btintel_set_diag;
2934                 hdev->set_bdaddr = btintel_set_bdaddr;
2935                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2936                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
2937         }
2938 
2939         if (id->driver_info & BTUSB_MARVELL)
2940                 hdev->set_bdaddr = btusb_set_bdaddr_marvell;
2941 
2942         if (id->driver_info & BTUSB_SWAVE) {
2943                 set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
2944                 set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
2945         }
2946 
2947         if (id->driver_info & BTUSB_INTEL_BOOT) {
2948                 hdev->manufacturer = 2;
2949                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
2950         }
2951 
2952         if (id->driver_info & BTUSB_ATH3012) {
2953                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
2954                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2955                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2956         }
2957 
2958         if (id->driver_info & BTUSB_QCA_ROME) {
2959                 data->setup_on_usb = btusb_setup_qca;
2960                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
2961         }
2962 
2963 #ifdef CONFIG_BT_HCIBTUSB_RTL
2964         if (id->driver_info & BTUSB_REALTEK) {
2965                 hdev->setup = btrtl_setup_realtek;
2966 
2967                 /* Realtek devices lose their updated firmware over suspend,
2968                  * but the USB hub doesn't notice any status change.
2969                  * Explicitly request a device reset on resume.
2970                  */
2971                 set_bit(BTUSB_RESET_RESUME, &data->flags);
2972         }
2973 #endif
2974 
2975         if (id->driver_info & BTUSB_AMP) {
2976                 /* AMP controllers do not support SCO packets */
2977                 data->isoc = NULL;
2978         } else {
2979                 /* Interface orders are hardcoded in the specification */
2980                 data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
2981         }
2982 
2983         if (!reset)
2984                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2985 
2986         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
2987                 if (!disable_scofix)
2988                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
2989         }
2990 
2991         if (id->driver_info & BTUSB_BROKEN_ISOC)
2992                 data->isoc = NULL;
2993 
2994         if (id->driver_info & BTUSB_DIGIANSWER) {
2995                 data->cmdreq_type = USB_TYPE_VENDOR;
2996                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2997         }
2998 
2999         if (id->driver_info & BTUSB_CSR) {
3000                 struct usb_device *udev = data->udev;
3001                 u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
3002 
3003                 /* Old firmware would otherwise execute USB reset */
3004                 if (bcdDevice < 0x117)
3005                         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3006 
3007                 /* Fake CSR devices with broken commands */
3008                 if (bcdDevice <= 0x100 || bcdDevice == 0x134)
3009                         hdev->setup = btusb_setup_csr;
3010 
3011                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3012         }
3013 
3014         if (id->driver_info & BTUSB_SNIFFER) {
3015                 struct usb_device *udev = data->udev;
3016 
3017                 /* New sniffer firmware has crippled HCI interface */
3018                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
3019                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
3020         }
3021 
3022         if (id->driver_info & BTUSB_INTEL_BOOT) {
3023                 /* A bug in the bootloader causes that interrupt interface is
3024                  * only enabled after receiving SetInterface(0, AltSetting=0).
3025                  */
3026                 err = usb_set_interface(data->udev, 0, 0);
3027                 if (err < 0) {
3028                         BT_ERR("failed to set interface 0, alt 0 %d", err);
3029                         hci_free_dev(hdev);
3030                         return err;
3031                 }
3032         }
3033 
3034         if (data->isoc) {
3035                 err = usb_driver_claim_interface(&btusb_driver,
3036                                                  data->isoc, data);
3037                 if (err < 0) {
3038                         hci_free_dev(hdev);
3039                         return err;
3040                 }
3041         }
3042 
3043 #ifdef CONFIG_BT_HCIBTUSB_BCM
3044         if (data->diag) {
3045                 if (!usb_driver_claim_interface(&btusb_driver,
3046                                                 data->diag, data))
3047                         __set_diag_interface(hdev);
3048                 else
3049                         data->diag = NULL;
3050         }
3051 #endif
3052 
3053         err = hci_register_dev(hdev);
3054         if (err < 0) {
3055                 hci_free_dev(hdev);
3056                 return err;
3057         }
3058 
3059         usb_set_intfdata(intf, data);
3060 
3061         return 0;
3062 }
3063 
3064 static void btusb_disconnect(struct usb_interface *intf)
3065 {
3066         struct btusb_data *data = usb_get_intfdata(intf);
3067         struct hci_dev *hdev;
3068 
3069         BT_DBG("intf %p", intf);
3070 
3071         if (!data)
3072                 return;
3073 
3074         hdev = data->hdev;
3075         usb_set_intfdata(data->intf, NULL);
3076 
3077         if (data->isoc)
3078                 usb_set_intfdata(data->isoc, NULL);
3079 
3080         if (data->diag)
3081                 usb_set_intfdata(data->diag, NULL);
3082 
3083         hci_unregister_dev(hdev);
3084 
3085         if (intf == data->intf) {
3086                 if (data->isoc)
3087                         usb_driver_release_interface(&btusb_driver, data->isoc);
3088                 if (data->diag)
3089                         usb_driver_release_interface(&btusb_driver, data->diag);
3090         } else if (intf == data->isoc) {
3091                 if (data->diag)
3092                         usb_driver_release_interface(&btusb_driver, data->diag);
3093                 usb_driver_release_interface(&btusb_driver, data->intf);
3094         } else if (intf == data->diag) {
3095                 usb_driver_release_interface(&btusb_driver, data->intf);
3096                 if (data->isoc)
3097                         usb_driver_release_interface(&btusb_driver, data->isoc);
3098         }
3099 
3100         hci_free_dev(hdev);
3101 }
3102 
3103 #ifdef CONFIG_PM
3104 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
3105 {
3106         struct btusb_data *data = usb_get_intfdata(intf);
3107 
3108         BT_DBG("intf %p", intf);
3109 
3110         if (data->suspend_count++)
3111                 return 0;
3112 
3113         spin_lock_irq(&data->txlock);
3114         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
3115                 set_bit(BTUSB_SUSPENDING, &data->flags);
3116                 spin_unlock_irq(&data->txlock);
3117         } else {
3118                 spin_unlock_irq(&data->txlock);
3119                 data->suspend_count--;
3120                 return -EBUSY;
3121         }
3122 
3123         cancel_work_sync(&data->work);
3124 
3125         btusb_stop_traffic(data);
3126         usb_kill_anchored_urbs(&data->tx_anchor);
3127 
3128         /* Optionally request a device reset on resume, but only when
3129          * wakeups are disabled. If wakeups are enabled we assume the
3130          * device will stay powered up throughout suspend.
3131          */
3132         if (test_bit(BTUSB_RESET_RESUME, &data->flags) &&
3133             !device_may_wakeup(&data->udev->dev))
3134                 data->udev->reset_resume = 1;
3135 
3136         return 0;
3137 }
3138 
3139 static void play_deferred(struct btusb_data *data)
3140 {
3141         struct urb *urb;
3142         int err;
3143 
3144         while ((urb = usb_get_from_anchor(&data->deferred))) {
3145                 err = usb_submit_urb(urb, GFP_ATOMIC);
3146                 if (err < 0)
3147                         break;
3148 
3149                 data->tx_in_flight++;
3150         }
3151         usb_scuttle_anchored_urbs(&data->deferred);
3152 }
3153 
3154 static int btusb_resume(struct usb_interface *intf)
3155 {
3156         struct btusb_data *data = usb_get_intfdata(intf);
3157         struct hci_dev *hdev = data->hdev;
3158         int err = 0;
3159 
3160         BT_DBG("intf %p", intf);
3161 
3162         if (--data->suspend_count)
3163                 return 0;
3164 
3165         if (!test_bit(HCI_RUNNING, &hdev->flags))
3166                 goto done;
3167 
3168         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
3169                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
3170                 if (err < 0) {
3171                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
3172                         goto failed;
3173                 }
3174         }
3175 
3176         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
3177                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
3178                 if (err < 0) {
3179                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
3180                         goto failed;
3181                 }
3182 
3183                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
3184         }
3185 
3186         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
3187                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
3188                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
3189                 else
3190                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
3191         }
3192 
3193         spin_lock_irq(&data->txlock);
3194         play_deferred(data);
3195         clear_bit(BTUSB_SUSPENDING, &data->flags);
3196         spin_unlock_irq(&data->txlock);
3197         schedule_work(&data->work);
3198 
3199         return 0;
3200 
3201 failed:
3202         usb_scuttle_anchored_urbs(&data->deferred);
3203 done:
3204         spin_lock_irq(&data->txlock);
3205         clear_bit(BTUSB_SUSPENDING, &data->flags);
3206         spin_unlock_irq(&data->txlock);
3207 
3208         return err;
3209 }
3210 #endif
3211 
3212 static struct usb_driver btusb_driver = {
3213         .name           = "btusb",
3214         .probe          = btusb_probe,
3215         .disconnect     = btusb_disconnect,
3216 #ifdef CONFIG_PM
3217         .suspend        = btusb_suspend,
3218         .resume         = btusb_resume,
3219 #endif
3220         .id_table       = btusb_table,
3221         .supports_autosuspend = 1,
3222         .disable_hub_initiated_lpm = 1,
3223 };
3224 
3225 module_usb_driver(btusb_driver);
3226 
3227 module_param(disable_scofix, bool, 0644);
3228 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
3229 
3230 module_param(force_scofix, bool, 0644);
3231 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
3232 
3233 module_param(reset, bool, 0644);
3234 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
3235 
3236 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
3237 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
3238 MODULE_VERSION(VERSION);
3239 MODULE_LICENSE("GPL");
3240 

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