Version:  2.0.40 2.2.26 2.4.37 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 4.5 4.6 4.7 4.8

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         /* Toshiba Corp - Broadcom based */
157         { USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
158           .driver_info = BTUSB_BCM_PATCHRAM },
159 
160         /* Intel Bluetooth USB Bootloader (RAM module) */
161         { USB_DEVICE(0x8087, 0x0a5a),
162           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
163 
164         { }     /* Terminating entry */
165 };
166 
167 MODULE_DEVICE_TABLE(usb, btusb_table);
168 
169 static const struct usb_device_id blacklist_table[] = {
170         /* CSR BlueCore devices */
171         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
172 
173         /* Broadcom BCM2033 without firmware */
174         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
175 
176         /* Broadcom BCM2045 devices */
177         { USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },
178 
179         /* Atheros 3011 with sflash firmware */
180         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
181         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
182         { USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
183         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
184         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
185         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
186         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
187 
188         /* Atheros AR9285 Malbec with sflash firmware */
189         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
190 
191         /* Atheros 3012 with sflash firmware */
192         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
193         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
194         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
195         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
196         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
197         { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
198         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
199         { USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
200         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
201         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
202         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
203         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
204         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
205         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
206         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
207         { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
208         { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
209         { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
210         { USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
211         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
212         { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
213         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
214         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
215         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
216         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
217         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
218         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
219         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
220         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
221         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
222         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
223         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
224         { USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
225         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
226         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
227         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
228         { USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
229         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
230         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
231         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
232         { USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
233         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
234         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
235         { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
236         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
237         { USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
238         { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
239         { USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
240         { USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
241 
242         /* Atheros AR5BBU12 with sflash firmware */
243         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
244 
245         /* Atheros AR5BBU12 with sflash firmware */
246         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
247         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
248 
249         /* QCA ROME chipset */
250         { USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME },
251         { USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME },
252         { USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME },
253         { USB_DEVICE(0x0489, 0xe092), .driver_info = BTUSB_QCA_ROME },
254 
255         /* Broadcom BCM2035 */
256         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
257         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
258         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
259 
260         /* Broadcom BCM2045 */
261         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
262         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
263 
264         /* IBM/Lenovo ThinkPad with Broadcom chip */
265         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
266         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
267 
268         /* HP laptop with Broadcom chip */
269         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
270 
271         /* Dell laptop with Broadcom chip */
272         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
273 
274         /* Dell Wireless 370 and 410 devices */
275         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
276         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
277 
278         /* Belkin F8T012 and F8T013 devices */
279         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
280         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
281 
282         /* Asus WL-BTD202 device */
283         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
284 
285         /* Kensington Bluetooth USB adapter */
286         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
287 
288         /* RTX Telecom based adapters with buggy SCO support */
289         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
290         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
291 
292         /* CONWISE Technology based adapters with buggy SCO support */
293         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
294 
295         /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
296         { USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
297 
298         /* Digianswer devices */
299         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
300         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
301 
302         /* CSR BlueCore Bluetooth Sniffer */
303         { USB_DEVICE(0x0a12, 0x0002),
304           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
305 
306         /* Frontline ComProbe Bluetooth Sniffer */
307         { USB_DEVICE(0x16d3, 0x0002),
308           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
309 
310         /* Marvell Bluetooth devices */
311         { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
312         { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
313 
314         /* Intel Bluetooth devices */
315         { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
316         { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
317         { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },
318         { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_NEW },
319         { USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL },
320 
321         /* Other Intel Bluetooth devices */
322         { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
323           .driver_info = BTUSB_IGNORE },
324 
325         /* Realtek Bluetooth devices */
326         { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
327           .driver_info = BTUSB_REALTEK },
328 
329         /* Additional Realtek 8723AE Bluetooth devices */
330         { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
331         { USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
332 
333         /* Additional Realtek 8723BE Bluetooth devices */
334         { USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
335         { USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
336         { USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
337         { USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
338         { USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
339 
340         /* Additional Realtek 8821AE Bluetooth devices */
341         { USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
342         { USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
343         { USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
344         { USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
345         { USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
346 
347         /* Silicon Wave based devices */
348         { USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
349 
350         { }     /* Terminating entry */
351 };
352 
353 #define BTUSB_MAX_ISOC_FRAMES   10
354 
355 #define BTUSB_INTR_RUNNING      0
356 #define BTUSB_BULK_RUNNING      1
357 #define BTUSB_ISOC_RUNNING      2
358 #define BTUSB_SUSPENDING        3
359 #define BTUSB_DID_ISO_RESUME    4
360 #define BTUSB_BOOTLOADER        5
361 #define BTUSB_DOWNLOADING       6
362 #define BTUSB_FIRMWARE_LOADED   7
363 #define BTUSB_FIRMWARE_FAILED   8
364 #define BTUSB_BOOTING           9
365 #define BTUSB_RESET_RESUME      10
366 #define BTUSB_DIAG_RUNNING      11
367 
368 struct btusb_data {
369         struct hci_dev       *hdev;
370         struct usb_device    *udev;
371         struct usb_interface *intf;
372         struct usb_interface *isoc;
373         struct usb_interface *diag;
374 
375         unsigned long flags;
376 
377         struct work_struct work;
378         struct work_struct waker;
379 
380         struct usb_anchor deferred;
381         struct usb_anchor tx_anchor;
382         int tx_in_flight;
383         spinlock_t txlock;
384 
385         struct usb_anchor intr_anchor;
386         struct usb_anchor bulk_anchor;
387         struct usb_anchor isoc_anchor;
388         struct usb_anchor diag_anchor;
389         spinlock_t rxlock;
390 
391         struct sk_buff *evt_skb;
392         struct sk_buff *acl_skb;
393         struct sk_buff *sco_skb;
394 
395         struct usb_endpoint_descriptor *intr_ep;
396         struct usb_endpoint_descriptor *bulk_tx_ep;
397         struct usb_endpoint_descriptor *bulk_rx_ep;
398         struct usb_endpoint_descriptor *isoc_tx_ep;
399         struct usb_endpoint_descriptor *isoc_rx_ep;
400         struct usb_endpoint_descriptor *diag_tx_ep;
401         struct usb_endpoint_descriptor *diag_rx_ep;
402 
403         __u8 cmdreq_type;
404         __u8 cmdreq;
405 
406         unsigned int sco_num;
407         int isoc_altsetting;
408         int suspend_count;
409 
410         int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
411         int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
412 
413         int (*setup_on_usb)(struct hci_dev *hdev);
414 };
415 
416 static inline void btusb_free_frags(struct btusb_data *data)
417 {
418         unsigned long flags;
419 
420         spin_lock_irqsave(&data->rxlock, flags);
421 
422         kfree_skb(data->evt_skb);
423         data->evt_skb = NULL;
424 
425         kfree_skb(data->acl_skb);
426         data->acl_skb = NULL;
427 
428         kfree_skb(data->sco_skb);
429         data->sco_skb = NULL;
430 
431         spin_unlock_irqrestore(&data->rxlock, flags);
432 }
433 
434 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
435 {
436         struct sk_buff *skb;
437         int err = 0;
438 
439         spin_lock(&data->rxlock);
440         skb = data->evt_skb;
441 
442         while (count) {
443                 int len;
444 
445                 if (!skb) {
446                         skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
447                         if (!skb) {
448                                 err = -ENOMEM;
449                                 break;
450                         }
451 
452                         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
453                         hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
454                 }
455 
456                 len = min_t(uint, hci_skb_expect(skb), count);
457                 memcpy(skb_put(skb, len), buffer, len);
458 
459                 count -= len;
460                 buffer += len;
461                 hci_skb_expect(skb) -= len;
462 
463                 if (skb->len == HCI_EVENT_HDR_SIZE) {
464                         /* Complete event header */
465                         hci_skb_expect(skb) = hci_event_hdr(skb)->plen;
466 
467                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
468                                 kfree_skb(skb);
469                                 skb = NULL;
470 
471                                 err = -EILSEQ;
472                                 break;
473                         }
474                 }
475 
476                 if (!hci_skb_expect(skb)) {
477                         /* Complete frame */
478                         data->recv_event(data->hdev, skb);
479                         skb = NULL;
480                 }
481         }
482 
483         data->evt_skb = skb;
484         spin_unlock(&data->rxlock);
485 
486         return err;
487 }
488 
489 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
490 {
491         struct sk_buff *skb;
492         int err = 0;
493 
494         spin_lock(&data->rxlock);
495         skb = data->acl_skb;
496 
497         while (count) {
498                 int len;
499 
500                 if (!skb) {
501                         skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
502                         if (!skb) {
503                                 err = -ENOMEM;
504                                 break;
505                         }
506 
507                         hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
508                         hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
509                 }
510 
511                 len = min_t(uint, hci_skb_expect(skb), count);
512                 memcpy(skb_put(skb, len), buffer, len);
513 
514                 count -= len;
515                 buffer += len;
516                 hci_skb_expect(skb) -= len;
517 
518                 if (skb->len == HCI_ACL_HDR_SIZE) {
519                         __le16 dlen = hci_acl_hdr(skb)->dlen;
520 
521                         /* Complete ACL header */
522                         hci_skb_expect(skb) = __le16_to_cpu(dlen);
523 
524                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
525                                 kfree_skb(skb);
526                                 skb = NULL;
527 
528                                 err = -EILSEQ;
529                                 break;
530                         }
531                 }
532 
533                 if (!hci_skb_expect(skb)) {
534                         /* Complete frame */
535                         hci_recv_frame(data->hdev, skb);
536                         skb = NULL;
537                 }
538         }
539 
540         data->acl_skb = skb;
541         spin_unlock(&data->rxlock);
542 
543         return err;
544 }
545 
546 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
547 {
548         struct sk_buff *skb;
549         int err = 0;
550 
551         spin_lock(&data->rxlock);
552         skb = data->sco_skb;
553 
554         while (count) {
555                 int len;
556 
557                 if (!skb) {
558                         skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
559                         if (!skb) {
560                                 err = -ENOMEM;
561                                 break;
562                         }
563 
564                         hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
565                         hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
566                 }
567 
568                 len = min_t(uint, hci_skb_expect(skb), count);
569                 memcpy(skb_put(skb, len), buffer, len);
570 
571                 count -= len;
572                 buffer += len;
573                 hci_skb_expect(skb) -= len;
574 
575                 if (skb->len == HCI_SCO_HDR_SIZE) {
576                         /* Complete SCO header */
577                         hci_skb_expect(skb) = hci_sco_hdr(skb)->dlen;
578 
579                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
580                                 kfree_skb(skb);
581                                 skb = NULL;
582 
583                                 err = -EILSEQ;
584                                 break;
585                         }
586                 }
587 
588                 if (!hci_skb_expect(skb)) {
589                         /* Complete frame */
590                         hci_recv_frame(data->hdev, skb);
591                         skb = NULL;
592                 }
593         }
594 
595         data->sco_skb = skb;
596         spin_unlock(&data->rxlock);
597 
598         return err;
599 }
600 
601 static void btusb_intr_complete(struct urb *urb)
602 {
603         struct hci_dev *hdev = urb->context;
604         struct btusb_data *data = hci_get_drvdata(hdev);
605         int err;
606 
607         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
608                urb->actual_length);
609 
610         if (!test_bit(HCI_RUNNING, &hdev->flags))
611                 return;
612 
613         if (urb->status == 0) {
614                 hdev->stat.byte_rx += urb->actual_length;
615 
616                 if (btusb_recv_intr(data, urb->transfer_buffer,
617                                     urb->actual_length) < 0) {
618                         BT_ERR("%s corrupted event packet", hdev->name);
619                         hdev->stat.err_rx++;
620                 }
621         } else if (urb->status == -ENOENT) {
622                 /* Avoid suspend failed when usb_kill_urb */
623                 return;
624         }
625 
626         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
627                 return;
628 
629         usb_mark_last_busy(data->udev);
630         usb_anchor_urb(urb, &data->intr_anchor);
631 
632         err = usb_submit_urb(urb, GFP_ATOMIC);
633         if (err < 0) {
634                 /* -EPERM: urb is being killed;
635                  * -ENODEV: device got disconnected */
636                 if (err != -EPERM && err != -ENODEV)
637                         BT_ERR("%s urb %p failed to resubmit (%d)",
638                                hdev->name, urb, -err);
639                 usb_unanchor_urb(urb);
640         }
641 }
642 
643 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
644 {
645         struct btusb_data *data = hci_get_drvdata(hdev);
646         struct urb *urb;
647         unsigned char *buf;
648         unsigned int pipe;
649         int err, size;
650 
651         BT_DBG("%s", hdev->name);
652 
653         if (!data->intr_ep)
654                 return -ENODEV;
655 
656         urb = usb_alloc_urb(0, mem_flags);
657         if (!urb)
658                 return -ENOMEM;
659 
660         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
661 
662         buf = kmalloc(size, mem_flags);
663         if (!buf) {
664                 usb_free_urb(urb);
665                 return -ENOMEM;
666         }
667 
668         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
669 
670         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
671                          btusb_intr_complete, hdev, data->intr_ep->bInterval);
672 
673         urb->transfer_flags |= URB_FREE_BUFFER;
674 
675         usb_anchor_urb(urb, &data->intr_anchor);
676 
677         err = usb_submit_urb(urb, mem_flags);
678         if (err < 0) {
679                 if (err != -EPERM && err != -ENODEV)
680                         BT_ERR("%s urb %p submission failed (%d)",
681                                hdev->name, urb, -err);
682                 usb_unanchor_urb(urb);
683         }
684 
685         usb_free_urb(urb);
686 
687         return err;
688 }
689 
690 static void btusb_bulk_complete(struct urb *urb)
691 {
692         struct hci_dev *hdev = urb->context;
693         struct btusb_data *data = hci_get_drvdata(hdev);
694         int err;
695 
696         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
697                urb->actual_length);
698 
699         if (!test_bit(HCI_RUNNING, &hdev->flags))
700                 return;
701 
702         if (urb->status == 0) {
703                 hdev->stat.byte_rx += urb->actual_length;
704 
705                 if (data->recv_bulk(data, urb->transfer_buffer,
706                                     urb->actual_length) < 0) {
707                         BT_ERR("%s corrupted ACL packet", hdev->name);
708                         hdev->stat.err_rx++;
709                 }
710         } else if (urb->status == -ENOENT) {
711                 /* Avoid suspend failed when usb_kill_urb */
712                 return;
713         }
714 
715         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
716                 return;
717 
718         usb_anchor_urb(urb, &data->bulk_anchor);
719         usb_mark_last_busy(data->udev);
720 
721         err = usb_submit_urb(urb, GFP_ATOMIC);
722         if (err < 0) {
723                 /* -EPERM: urb is being killed;
724                  * -ENODEV: device got disconnected */
725                 if (err != -EPERM && err != -ENODEV)
726                         BT_ERR("%s urb %p failed to resubmit (%d)",
727                                hdev->name, urb, -err);
728                 usb_unanchor_urb(urb);
729         }
730 }
731 
732 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
733 {
734         struct btusb_data *data = hci_get_drvdata(hdev);
735         struct urb *urb;
736         unsigned char *buf;
737         unsigned int pipe;
738         int err, size = HCI_MAX_FRAME_SIZE;
739 
740         BT_DBG("%s", hdev->name);
741 
742         if (!data->bulk_rx_ep)
743                 return -ENODEV;
744 
745         urb = usb_alloc_urb(0, mem_flags);
746         if (!urb)
747                 return -ENOMEM;
748 
749         buf = kmalloc(size, mem_flags);
750         if (!buf) {
751                 usb_free_urb(urb);
752                 return -ENOMEM;
753         }
754 
755         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
756 
757         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
758                           btusb_bulk_complete, hdev);
759 
760         urb->transfer_flags |= URB_FREE_BUFFER;
761 
762         usb_mark_last_busy(data->udev);
763         usb_anchor_urb(urb, &data->bulk_anchor);
764 
765         err = usb_submit_urb(urb, mem_flags);
766         if (err < 0) {
767                 if (err != -EPERM && err != -ENODEV)
768                         BT_ERR("%s urb %p submission failed (%d)",
769                                hdev->name, urb, -err);
770                 usb_unanchor_urb(urb);
771         }
772 
773         usb_free_urb(urb);
774 
775         return err;
776 }
777 
778 static void btusb_isoc_complete(struct urb *urb)
779 {
780         struct hci_dev *hdev = urb->context;
781         struct btusb_data *data = hci_get_drvdata(hdev);
782         int i, err;
783 
784         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
785                urb->actual_length);
786 
787         if (!test_bit(HCI_RUNNING, &hdev->flags))
788                 return;
789 
790         if (urb->status == 0) {
791                 for (i = 0; i < urb->number_of_packets; i++) {
792                         unsigned int offset = urb->iso_frame_desc[i].offset;
793                         unsigned int length = urb->iso_frame_desc[i].actual_length;
794 
795                         if (urb->iso_frame_desc[i].status)
796                                 continue;
797 
798                         hdev->stat.byte_rx += length;
799 
800                         if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
801                                             length) < 0) {
802                                 BT_ERR("%s corrupted SCO packet", hdev->name);
803                                 hdev->stat.err_rx++;
804                         }
805                 }
806         } else if (urb->status == -ENOENT) {
807                 /* Avoid suspend failed when usb_kill_urb */
808                 return;
809         }
810 
811         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
812                 return;
813 
814         usb_anchor_urb(urb, &data->isoc_anchor);
815 
816         err = usb_submit_urb(urb, GFP_ATOMIC);
817         if (err < 0) {
818                 /* -EPERM: urb is being killed;
819                  * -ENODEV: device got disconnected */
820                 if (err != -EPERM && err != -ENODEV)
821                         BT_ERR("%s urb %p failed to resubmit (%d)",
822                                hdev->name, urb, -err);
823                 usb_unanchor_urb(urb);
824         }
825 }
826 
827 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
828 {
829         int i, offset = 0;
830 
831         BT_DBG("len %d mtu %d", len, mtu);
832 
833         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
834                                         i++, offset += mtu, len -= mtu) {
835                 urb->iso_frame_desc[i].offset = offset;
836                 urb->iso_frame_desc[i].length = mtu;
837         }
838 
839         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
840                 urb->iso_frame_desc[i].offset = offset;
841                 urb->iso_frame_desc[i].length = len;
842                 i++;
843         }
844 
845         urb->number_of_packets = i;
846 }
847 
848 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
849 {
850         struct btusb_data *data = hci_get_drvdata(hdev);
851         struct urb *urb;
852         unsigned char *buf;
853         unsigned int pipe;
854         int err, size;
855 
856         BT_DBG("%s", hdev->name);
857 
858         if (!data->isoc_rx_ep)
859                 return -ENODEV;
860 
861         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
862         if (!urb)
863                 return -ENOMEM;
864 
865         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
866                                                 BTUSB_MAX_ISOC_FRAMES;
867 
868         buf = kmalloc(size, mem_flags);
869         if (!buf) {
870                 usb_free_urb(urb);
871                 return -ENOMEM;
872         }
873 
874         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
875 
876         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
877                          hdev, data->isoc_rx_ep->bInterval);
878 
879         urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
880 
881         __fill_isoc_descriptor(urb, size,
882                                le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
883 
884         usb_anchor_urb(urb, &data->isoc_anchor);
885 
886         err = usb_submit_urb(urb, mem_flags);
887         if (err < 0) {
888                 if (err != -EPERM && err != -ENODEV)
889                         BT_ERR("%s urb %p submission failed (%d)",
890                                hdev->name, urb, -err);
891                 usb_unanchor_urb(urb);
892         }
893 
894         usb_free_urb(urb);
895 
896         return err;
897 }
898 
899 static void btusb_diag_complete(struct urb *urb)
900 {
901         struct hci_dev *hdev = urb->context;
902         struct btusb_data *data = hci_get_drvdata(hdev);
903         int err;
904 
905         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
906                urb->actual_length);
907 
908         if (urb->status == 0) {
909                 struct sk_buff *skb;
910 
911                 skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
912                 if (skb) {
913                         memcpy(skb_put(skb, urb->actual_length),
914                                urb->transfer_buffer, urb->actual_length);
915                         hci_recv_diag(hdev, skb);
916                 }
917         } else if (urb->status == -ENOENT) {
918                 /* Avoid suspend failed when usb_kill_urb */
919                 return;
920         }
921 
922         if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
923                 return;
924 
925         usb_anchor_urb(urb, &data->diag_anchor);
926         usb_mark_last_busy(data->udev);
927 
928         err = usb_submit_urb(urb, GFP_ATOMIC);
929         if (err < 0) {
930                 /* -EPERM: urb is being killed;
931                  * -ENODEV: device got disconnected */
932                 if (err != -EPERM && err != -ENODEV)
933                         BT_ERR("%s urb %p failed to resubmit (%d)",
934                                hdev->name, urb, -err);
935                 usb_unanchor_urb(urb);
936         }
937 }
938 
939 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
940 {
941         struct btusb_data *data = hci_get_drvdata(hdev);
942         struct urb *urb;
943         unsigned char *buf;
944         unsigned int pipe;
945         int err, size = HCI_MAX_FRAME_SIZE;
946 
947         BT_DBG("%s", hdev->name);
948 
949         if (!data->diag_rx_ep)
950                 return -ENODEV;
951 
952         urb = usb_alloc_urb(0, mem_flags);
953         if (!urb)
954                 return -ENOMEM;
955 
956         buf = kmalloc(size, mem_flags);
957         if (!buf) {
958                 usb_free_urb(urb);
959                 return -ENOMEM;
960         }
961 
962         pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
963 
964         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
965                           btusb_diag_complete, hdev);
966 
967         urb->transfer_flags |= URB_FREE_BUFFER;
968 
969         usb_mark_last_busy(data->udev);
970         usb_anchor_urb(urb, &data->diag_anchor);
971 
972         err = usb_submit_urb(urb, mem_flags);
973         if (err < 0) {
974                 if (err != -EPERM && err != -ENODEV)
975                         BT_ERR("%s urb %p submission failed (%d)",
976                                hdev->name, urb, -err);
977                 usb_unanchor_urb(urb);
978         }
979 
980         usb_free_urb(urb);
981 
982         return err;
983 }
984 
985 static void btusb_tx_complete(struct urb *urb)
986 {
987         struct sk_buff *skb = urb->context;
988         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
989         struct btusb_data *data = hci_get_drvdata(hdev);
990 
991         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
992                urb->actual_length);
993 
994         if (!test_bit(HCI_RUNNING, &hdev->flags))
995                 goto done;
996 
997         if (!urb->status)
998                 hdev->stat.byte_tx += urb->transfer_buffer_length;
999         else
1000                 hdev->stat.err_tx++;
1001 
1002 done:
1003         spin_lock(&data->txlock);
1004         data->tx_in_flight--;
1005         spin_unlock(&data->txlock);
1006 
1007         kfree(urb->setup_packet);
1008 
1009         kfree_skb(skb);
1010 }
1011 
1012 static void btusb_isoc_tx_complete(struct urb *urb)
1013 {
1014         struct sk_buff *skb = urb->context;
1015         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1016 
1017         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1018                urb->actual_length);
1019 
1020         if (!test_bit(HCI_RUNNING, &hdev->flags))
1021                 goto done;
1022 
1023         if (!urb->status)
1024                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1025         else
1026                 hdev->stat.err_tx++;
1027 
1028 done:
1029         kfree(urb->setup_packet);
1030 
1031         kfree_skb(skb);
1032 }
1033 
1034 static int btusb_open(struct hci_dev *hdev)
1035 {
1036         struct btusb_data *data = hci_get_drvdata(hdev);
1037         int err;
1038 
1039         BT_DBG("%s", hdev->name);
1040 
1041         /* Patching USB firmware files prior to starting any URBs of HCI path
1042          * It is more safe to use USB bulk channel for downloading USB patch
1043          */
1044         if (data->setup_on_usb) {
1045                 err = data->setup_on_usb(hdev);
1046                 if (err < 0)
1047                         return err;
1048         }
1049 
1050         err = usb_autopm_get_interface(data->intf);
1051         if (err < 0)
1052                 return err;
1053 
1054         data->intf->needs_remote_wakeup = 1;
1055 
1056         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1057                 goto done;
1058 
1059         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1060         if (err < 0)
1061                 goto failed;
1062 
1063         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1064         if (err < 0) {
1065                 usb_kill_anchored_urbs(&data->intr_anchor);
1066                 goto failed;
1067         }
1068 
1069         set_bit(BTUSB_BULK_RUNNING, &data->flags);
1070         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1071 
1072         if (data->diag) {
1073                 if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1074                         set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1075         }
1076 
1077 done:
1078         usb_autopm_put_interface(data->intf);
1079         return 0;
1080 
1081 failed:
1082         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1083         usb_autopm_put_interface(data->intf);
1084         return err;
1085 }
1086 
1087 static void btusb_stop_traffic(struct btusb_data *data)
1088 {
1089         usb_kill_anchored_urbs(&data->intr_anchor);
1090         usb_kill_anchored_urbs(&data->bulk_anchor);
1091         usb_kill_anchored_urbs(&data->isoc_anchor);
1092         usb_kill_anchored_urbs(&data->diag_anchor);
1093 }
1094 
1095 static int btusb_close(struct hci_dev *hdev)
1096 {
1097         struct btusb_data *data = hci_get_drvdata(hdev);
1098         int err;
1099 
1100         BT_DBG("%s", hdev->name);
1101 
1102         cancel_work_sync(&data->work);
1103         cancel_work_sync(&data->waker);
1104 
1105         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1106         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1107         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1108         clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1109 
1110         btusb_stop_traffic(data);
1111         btusb_free_frags(data);
1112 
1113         err = usb_autopm_get_interface(data->intf);
1114         if (err < 0)
1115                 goto failed;
1116 
1117         data->intf->needs_remote_wakeup = 0;
1118         usb_autopm_put_interface(data->intf);
1119 
1120 failed:
1121         usb_scuttle_anchored_urbs(&data->deferred);
1122         return 0;
1123 }
1124 
1125 static int btusb_flush(struct hci_dev *hdev)
1126 {
1127         struct btusb_data *data = hci_get_drvdata(hdev);
1128 
1129         BT_DBG("%s", hdev->name);
1130 
1131         usb_kill_anchored_urbs(&data->tx_anchor);
1132         btusb_free_frags(data);
1133 
1134         return 0;
1135 }
1136 
1137 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1138 {
1139         struct btusb_data *data = hci_get_drvdata(hdev);
1140         struct usb_ctrlrequest *dr;
1141         struct urb *urb;
1142         unsigned int pipe;
1143 
1144         urb = usb_alloc_urb(0, GFP_KERNEL);
1145         if (!urb)
1146                 return ERR_PTR(-ENOMEM);
1147 
1148         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1149         if (!dr) {
1150                 usb_free_urb(urb);
1151                 return ERR_PTR(-ENOMEM);
1152         }
1153 
1154         dr->bRequestType = data->cmdreq_type;
1155         dr->bRequest     = data->cmdreq;
1156         dr->wIndex       = 0;
1157         dr->wValue       = 0;
1158         dr->wLength      = __cpu_to_le16(skb->len);
1159 
1160         pipe = usb_sndctrlpipe(data->udev, 0x00);
1161 
1162         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1163                              skb->data, skb->len, btusb_tx_complete, skb);
1164 
1165         skb->dev = (void *)hdev;
1166 
1167         return urb;
1168 }
1169 
1170 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1171 {
1172         struct btusb_data *data = hci_get_drvdata(hdev);
1173         struct urb *urb;
1174         unsigned int pipe;
1175 
1176         if (!data->bulk_tx_ep)
1177                 return ERR_PTR(-ENODEV);
1178 
1179         urb = usb_alloc_urb(0, GFP_KERNEL);
1180         if (!urb)
1181                 return ERR_PTR(-ENOMEM);
1182 
1183         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1184 
1185         usb_fill_bulk_urb(urb, data->udev, pipe,
1186                           skb->data, skb->len, btusb_tx_complete, skb);
1187 
1188         skb->dev = (void *)hdev;
1189 
1190         return urb;
1191 }
1192 
1193 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1194 {
1195         struct btusb_data *data = hci_get_drvdata(hdev);
1196         struct urb *urb;
1197         unsigned int pipe;
1198 
1199         if (!data->isoc_tx_ep)
1200                 return ERR_PTR(-ENODEV);
1201 
1202         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1203         if (!urb)
1204                 return ERR_PTR(-ENOMEM);
1205 
1206         pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1207 
1208         usb_fill_int_urb(urb, data->udev, pipe,
1209                          skb->data, skb->len, btusb_isoc_tx_complete,
1210                          skb, data->isoc_tx_ep->bInterval);
1211 
1212         urb->transfer_flags  = URB_ISO_ASAP;
1213 
1214         __fill_isoc_descriptor(urb, skb->len,
1215                                le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1216 
1217         skb->dev = (void *)hdev;
1218 
1219         return urb;
1220 }
1221 
1222 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1223 {
1224         struct btusb_data *data = hci_get_drvdata(hdev);
1225         int err;
1226 
1227         usb_anchor_urb(urb, &data->tx_anchor);
1228 
1229         err = usb_submit_urb(urb, GFP_KERNEL);
1230         if (err < 0) {
1231                 if (err != -EPERM && err != -ENODEV)
1232                         BT_ERR("%s urb %p submission failed (%d)",
1233                                hdev->name, urb, -err);
1234                 kfree(urb->setup_packet);
1235                 usb_unanchor_urb(urb);
1236         } else {
1237                 usb_mark_last_busy(data->udev);
1238         }
1239 
1240         usb_free_urb(urb);
1241         return err;
1242 }
1243 
1244 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1245 {
1246         struct btusb_data *data = hci_get_drvdata(hdev);
1247         unsigned long flags;
1248         bool suspending;
1249 
1250         spin_lock_irqsave(&data->txlock, flags);
1251         suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1252         if (!suspending)
1253                 data->tx_in_flight++;
1254         spin_unlock_irqrestore(&data->txlock, flags);
1255 
1256         if (!suspending)
1257                 return submit_tx_urb(hdev, urb);
1258 
1259         usb_anchor_urb(urb, &data->deferred);
1260         schedule_work(&data->waker);
1261 
1262         usb_free_urb(urb);
1263         return 0;
1264 }
1265 
1266 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1267 {
1268         struct urb *urb;
1269 
1270         BT_DBG("%s", hdev->name);
1271 
1272         switch (hci_skb_pkt_type(skb)) {
1273         case HCI_COMMAND_PKT:
1274                 urb = alloc_ctrl_urb(hdev, skb);
1275                 if (IS_ERR(urb))
1276                         return PTR_ERR(urb);
1277 
1278                 hdev->stat.cmd_tx++;
1279                 return submit_or_queue_tx_urb(hdev, urb);
1280 
1281         case HCI_ACLDATA_PKT:
1282                 urb = alloc_bulk_urb(hdev, skb);
1283                 if (IS_ERR(urb))
1284                         return PTR_ERR(urb);
1285 
1286                 hdev->stat.acl_tx++;
1287                 return submit_or_queue_tx_urb(hdev, urb);
1288 
1289         case HCI_SCODATA_PKT:
1290                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1291                         return -ENODEV;
1292 
1293                 urb = alloc_isoc_urb(hdev, skb);
1294                 if (IS_ERR(urb))
1295                         return PTR_ERR(urb);
1296 
1297                 hdev->stat.sco_tx++;
1298                 return submit_tx_urb(hdev, urb);
1299         }
1300 
1301         return -EILSEQ;
1302 }
1303 
1304 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1305 {
1306         struct btusb_data *data = hci_get_drvdata(hdev);
1307 
1308         BT_DBG("%s evt %d", hdev->name, evt);
1309 
1310         if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1311                 data->sco_num = hci_conn_num(hdev, SCO_LINK);
1312                 schedule_work(&data->work);
1313         }
1314 }
1315 
1316 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1317 {
1318         struct btusb_data *data = hci_get_drvdata(hdev);
1319         struct usb_interface *intf = data->isoc;
1320         struct usb_endpoint_descriptor *ep_desc;
1321         int i, err;
1322 
1323         if (!data->isoc)
1324                 return -ENODEV;
1325 
1326         err = usb_set_interface(data->udev, 1, altsetting);
1327         if (err < 0) {
1328                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
1329                 return err;
1330         }
1331 
1332         data->isoc_altsetting = altsetting;
1333 
1334         data->isoc_tx_ep = NULL;
1335         data->isoc_rx_ep = NULL;
1336 
1337         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1338                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1339 
1340                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1341                         data->isoc_tx_ep = ep_desc;
1342                         continue;
1343                 }
1344 
1345                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1346                         data->isoc_rx_ep = ep_desc;
1347                         continue;
1348                 }
1349         }
1350 
1351         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1352                 BT_ERR("%s invalid SCO descriptors", hdev->name);
1353                 return -ENODEV;
1354         }
1355 
1356         return 0;
1357 }
1358 
1359 static void btusb_work(struct work_struct *work)
1360 {
1361         struct btusb_data *data = container_of(work, struct btusb_data, work);
1362         struct hci_dev *hdev = data->hdev;
1363         int new_alts;
1364         int err;
1365 
1366         if (data->sco_num > 0) {
1367                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1368                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1369                         if (err < 0) {
1370                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1371                                 usb_kill_anchored_urbs(&data->isoc_anchor);
1372                                 return;
1373                         }
1374 
1375                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1376                 }
1377 
1378                 if (hdev->voice_setting & 0x0020) {
1379                         static const int alts[3] = { 2, 4, 5 };
1380 
1381                         new_alts = alts[data->sco_num - 1];
1382                 } else {
1383                         new_alts = data->sco_num;
1384                 }
1385 
1386                 if (data->isoc_altsetting != new_alts) {
1387                         unsigned long flags;
1388 
1389                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1390                         usb_kill_anchored_urbs(&data->isoc_anchor);
1391 
1392                         /* When isochronous alternate setting needs to be
1393                          * changed, because SCO connection has been added
1394                          * or removed, a packet fragment may be left in the
1395                          * reassembling state. This could lead to wrongly
1396                          * assembled fragments.
1397                          *
1398                          * Clear outstanding fragment when selecting a new
1399                          * alternate setting.
1400                          */
1401                         spin_lock_irqsave(&data->rxlock, flags);
1402                         kfree_skb(data->sco_skb);
1403                         data->sco_skb = NULL;
1404                         spin_unlock_irqrestore(&data->rxlock, flags);
1405 
1406                         if (__set_isoc_interface(hdev, new_alts) < 0)
1407                                 return;
1408                 }
1409 
1410                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1411                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1412                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1413                         else
1414                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1415                 }
1416         } else {
1417                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1418                 usb_kill_anchored_urbs(&data->isoc_anchor);
1419 
1420                 __set_isoc_interface(hdev, 0);
1421                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1422                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1423         }
1424 }
1425 
1426 static void btusb_waker(struct work_struct *work)
1427 {
1428         struct btusb_data *data = container_of(work, struct btusb_data, waker);
1429         int err;
1430 
1431         err = usb_autopm_get_interface(data->intf);
1432         if (err < 0)
1433                 return;
1434 
1435         usb_autopm_put_interface(data->intf);
1436 }
1437 
1438 static int btusb_setup_bcm92035(struct hci_dev *hdev)
1439 {
1440         struct sk_buff *skb;
1441         u8 val = 0x00;
1442 
1443         BT_DBG("%s", hdev->name);
1444 
1445         skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
1446         if (IS_ERR(skb))
1447                 BT_ERR("BCM92035 command failed (%ld)", -PTR_ERR(skb));
1448         else
1449                 kfree_skb(skb);
1450 
1451         return 0;
1452 }
1453 
1454 static int btusb_setup_csr(struct hci_dev *hdev)
1455 {
1456         struct hci_rp_read_local_version *rp;
1457         struct sk_buff *skb;
1458 
1459         BT_DBG("%s", hdev->name);
1460 
1461         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
1462                              HCI_INIT_TIMEOUT);
1463         if (IS_ERR(skb)) {
1464                 int err = PTR_ERR(skb);
1465                 BT_ERR("%s: CSR: Local version failed (%d)", hdev->name, err);
1466                 return err;
1467         }
1468 
1469         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
1470                 BT_ERR("%s: CSR: Local version length mismatch", hdev->name);
1471                 kfree_skb(skb);
1472                 return -EIO;
1473         }
1474 
1475         rp = (struct hci_rp_read_local_version *)skb->data;
1476 
1477         /* Detect controllers which aren't real CSR ones. */
1478         if (le16_to_cpu(rp->manufacturer) != 10 ||
1479             le16_to_cpu(rp->lmp_subver) == 0x0c5c) {
1480                 /* Clear the reset quirk since this is not an actual
1481                  * early Bluetooth 1.1 device from CSR.
1482                  */
1483                 clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1484 
1485                 /* These fake CSR controllers have all a broken
1486                  * stored link key handling and so just disable it.
1487                  */
1488                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
1489         }
1490 
1491         kfree_skb(skb);
1492 
1493         return 0;
1494 }
1495 
1496 static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
1497                                                        struct intel_version *ver)
1498 {
1499         const struct firmware *fw;
1500         char fwname[64];
1501         int ret;
1502 
1503         snprintf(fwname, sizeof(fwname),
1504                  "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
1505                  ver->hw_platform, ver->hw_variant, ver->hw_revision,
1506                  ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
1507                  ver->fw_build_ww, ver->fw_build_yy);
1508 
1509         ret = request_firmware(&fw, fwname, &hdev->dev);
1510         if (ret < 0) {
1511                 if (ret == -EINVAL) {
1512                         BT_ERR("%s Intel firmware file request failed (%d)",
1513                                hdev->name, ret);
1514                         return NULL;
1515                 }
1516 
1517                 BT_ERR("%s failed to open Intel firmware file: %s(%d)",
1518                        hdev->name, fwname, ret);
1519 
1520                 /* If the correct firmware patch file is not found, use the
1521                  * default firmware patch file instead
1522                  */
1523                 snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
1524                          ver->hw_platform, ver->hw_variant);
1525                 if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
1526                         BT_ERR("%s failed to open default Intel fw file: %s",
1527                                hdev->name, fwname);
1528                         return NULL;
1529                 }
1530         }
1531 
1532         BT_INFO("%s: Intel Bluetooth firmware file: %s", hdev->name, fwname);
1533 
1534         return fw;
1535 }
1536 
1537 static int btusb_setup_intel_patching(struct hci_dev *hdev,
1538                                       const struct firmware *fw,
1539                                       const u8 **fw_ptr, int *disable_patch)
1540 {
1541         struct sk_buff *skb;
1542         struct hci_command_hdr *cmd;
1543         const u8 *cmd_param;
1544         struct hci_event_hdr *evt = NULL;
1545         const u8 *evt_param = NULL;
1546         int remain = fw->size - (*fw_ptr - fw->data);
1547 
1548         /* The first byte indicates the types of the patch command or event.
1549          * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
1550          * in the current firmware buffer doesn't start with 0x01 or
1551          * the size of remain buffer is smaller than HCI command header,
1552          * the firmware file is corrupted and it should stop the patching
1553          * process.
1554          */
1555         if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
1556                 BT_ERR("%s Intel fw corrupted: invalid cmd read", hdev->name);
1557                 return -EINVAL;
1558         }
1559         (*fw_ptr)++;
1560         remain--;
1561 
1562         cmd = (struct hci_command_hdr *)(*fw_ptr);
1563         *fw_ptr += sizeof(*cmd);
1564         remain -= sizeof(*cmd);
1565 
1566         /* Ensure that the remain firmware data is long enough than the length
1567          * of command parameter. If not, the firmware file is corrupted.
1568          */
1569         if (remain < cmd->plen) {
1570                 BT_ERR("%s Intel fw corrupted: invalid cmd len", hdev->name);
1571                 return -EFAULT;
1572         }
1573 
1574         /* If there is a command that loads a patch in the firmware
1575          * file, then enable the patch upon success, otherwise just
1576          * disable the manufacturer mode, for example patch activation
1577          * is not required when the default firmware patch file is used
1578          * because there are no patch data to load.
1579          */
1580         if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
1581                 *disable_patch = 0;
1582 
1583         cmd_param = *fw_ptr;
1584         *fw_ptr += cmd->plen;
1585         remain -= cmd->plen;
1586 
1587         /* This reads the expected events when the above command is sent to the
1588          * device. Some vendor commands expects more than one events, for
1589          * example command status event followed by vendor specific event.
1590          * For this case, it only keeps the last expected event. so the command
1591          * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
1592          * last expected event.
1593          */
1594         while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
1595                 (*fw_ptr)++;
1596                 remain--;
1597 
1598                 evt = (struct hci_event_hdr *)(*fw_ptr);
1599                 *fw_ptr += sizeof(*evt);
1600                 remain -= sizeof(*evt);
1601 
1602                 if (remain < evt->plen) {
1603                         BT_ERR("%s Intel fw corrupted: invalid evt len",
1604                                hdev->name);
1605                         return -EFAULT;
1606                 }
1607 
1608                 evt_param = *fw_ptr;
1609                 *fw_ptr += evt->plen;
1610                 remain -= evt->plen;
1611         }
1612 
1613         /* Every HCI commands in the firmware file has its correspond event.
1614          * If event is not found or remain is smaller than zero, the firmware
1615          * file is corrupted.
1616          */
1617         if (!evt || !evt_param || remain < 0) {
1618                 BT_ERR("%s Intel fw corrupted: invalid evt read", hdev->name);
1619                 return -EFAULT;
1620         }
1621 
1622         skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
1623                                 cmd_param, evt->evt, HCI_INIT_TIMEOUT);
1624         if (IS_ERR(skb)) {
1625                 BT_ERR("%s sending Intel patch command (0x%4.4x) failed (%ld)",
1626                        hdev->name, cmd->opcode, PTR_ERR(skb));
1627                 return PTR_ERR(skb);
1628         }
1629 
1630         /* It ensures that the returned event matches the event data read from
1631          * the firmware file. At fist, it checks the length and then
1632          * the contents of the event.
1633          */
1634         if (skb->len != evt->plen) {
1635                 BT_ERR("%s mismatch event length (opcode 0x%4.4x)", hdev->name,
1636                        le16_to_cpu(cmd->opcode));
1637                 kfree_skb(skb);
1638                 return -EFAULT;
1639         }
1640 
1641         if (memcmp(skb->data, evt_param, evt->plen)) {
1642                 BT_ERR("%s mismatch event parameter (opcode 0x%4.4x)",
1643                        hdev->name, le16_to_cpu(cmd->opcode));
1644                 kfree_skb(skb);
1645                 return -EFAULT;
1646         }
1647         kfree_skb(skb);
1648 
1649         return 0;
1650 }
1651 
1652 static int btusb_setup_intel(struct hci_dev *hdev)
1653 {
1654         struct sk_buff *skb;
1655         const struct firmware *fw;
1656         const u8 *fw_ptr;
1657         int disable_patch, err;
1658         struct intel_version ver;
1659 
1660         BT_DBG("%s", hdev->name);
1661 
1662         /* The controller has a bug with the first HCI command sent to it
1663          * returning number of completed commands as zero. This would stall the
1664          * command processing in the Bluetooth core.
1665          *
1666          * As a workaround, send HCI Reset command first which will reset the
1667          * number of completed commands and allow normal command processing
1668          * from now on.
1669          */
1670         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
1671         if (IS_ERR(skb)) {
1672                 BT_ERR("%s sending initial HCI reset command failed (%ld)",
1673                        hdev->name, PTR_ERR(skb));
1674                 return PTR_ERR(skb);
1675         }
1676         kfree_skb(skb);
1677 
1678         /* Read Intel specific controller version first to allow selection of
1679          * which firmware file to load.
1680          *
1681          * The returned information are hardware variant and revision plus
1682          * firmware variant, revision and build number.
1683          */
1684         err = btintel_read_version(hdev, &ver);
1685         if (err)
1686                 return err;
1687 
1688         BT_INFO("%s: read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
1689                 hdev->name, ver.hw_platform, ver.hw_variant, ver.hw_revision,
1690                 ver.fw_variant,  ver.fw_revision, ver.fw_build_num,
1691                 ver.fw_build_ww, ver.fw_build_yy, ver.fw_patch_num);
1692 
1693         /* fw_patch_num indicates the version of patch the device currently
1694          * have. If there is no patch data in the device, it is always 0x00.
1695          * So, if it is other than 0x00, no need to patch the device again.
1696          */
1697         if (ver.fw_patch_num) {
1698                 BT_INFO("%s: Intel device is already patched. patch num: %02x",
1699                         hdev->name, ver.fw_patch_num);
1700                 goto complete;
1701         }
1702 
1703         /* Opens the firmware patch file based on the firmware version read
1704          * from the controller. If it fails to open the matching firmware
1705          * patch file, it tries to open the default firmware patch file.
1706          * If no patch file is found, allow the device to operate without
1707          * a patch.
1708          */
1709         fw = btusb_setup_intel_get_fw(hdev, &ver);
1710         if (!fw)
1711                 goto complete;
1712         fw_ptr = fw->data;
1713 
1714         /* Enable the manufacturer mode of the controller.
1715          * Only while this mode is enabled, the driver can download the
1716          * firmware patch data and configuration parameters.
1717          */
1718         err = btintel_enter_mfg(hdev);
1719         if (err) {
1720                 release_firmware(fw);
1721                 return err;
1722         }
1723 
1724         disable_patch = 1;
1725 
1726         /* The firmware data file consists of list of Intel specific HCI
1727          * commands and its expected events. The first byte indicates the
1728          * type of the message, either HCI command or HCI event.
1729          *
1730          * It reads the command and its expected event from the firmware file,
1731          * and send to the controller. Once __hci_cmd_sync_ev() returns,
1732          * the returned event is compared with the event read from the firmware
1733          * file and it will continue until all the messages are downloaded to
1734          * the controller.
1735          *
1736          * Once the firmware patching is completed successfully,
1737          * the manufacturer mode is disabled with reset and activating the
1738          * downloaded patch.
1739          *
1740          * If the firmware patching fails, the manufacturer mode is
1741          * disabled with reset and deactivating the patch.
1742          *
1743          * If the default patch file is used, no reset is done when disabling
1744          * the manufacturer.
1745          */
1746         while (fw->size > fw_ptr - fw->data) {
1747                 int ret;
1748 
1749                 ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
1750                                                  &disable_patch);
1751                 if (ret < 0)
1752                         goto exit_mfg_deactivate;
1753         }
1754 
1755         release_firmware(fw);
1756 
1757         if (disable_patch)
1758                 goto exit_mfg_disable;
1759 
1760         /* Patching completed successfully and disable the manufacturer mode
1761          * with reset and activate the downloaded firmware patches.
1762          */
1763         err = btintel_exit_mfg(hdev, true, true);
1764         if (err)
1765                 return err;
1766 
1767         BT_INFO("%s: Intel Bluetooth firmware patch completed and activated",
1768                 hdev->name);
1769 
1770         goto complete;
1771 
1772 exit_mfg_disable:
1773         /* Disable the manufacturer mode without reset */
1774         err = btintel_exit_mfg(hdev, false, false);
1775         if (err)
1776                 return err;
1777 
1778         BT_INFO("%s: Intel Bluetooth firmware patch completed", hdev->name);
1779 
1780         goto complete;
1781 
1782 exit_mfg_deactivate:
1783         release_firmware(fw);
1784 
1785         /* Patching failed. Disable the manufacturer mode with reset and
1786          * deactivate the downloaded firmware patches.
1787          */
1788         err = btintel_exit_mfg(hdev, true, false);
1789         if (err)
1790                 return err;
1791 
1792         BT_INFO("%s: Intel Bluetooth firmware patch completed and deactivated",
1793                 hdev->name);
1794 
1795 complete:
1796         /* Set the event mask for Intel specific vendor events. This enables
1797          * a few extra events that are useful during general operation.
1798          */
1799         btintel_set_event_mask_mfg(hdev, false);
1800 
1801         btintel_check_bdaddr(hdev);
1802         return 0;
1803 }
1804 
1805 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
1806 {
1807         struct sk_buff *skb;
1808         struct hci_event_hdr *hdr;
1809         struct hci_ev_cmd_complete *evt;
1810 
1811         skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
1812         if (!skb)
1813                 return -ENOMEM;
1814 
1815         hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr));
1816         hdr->evt = HCI_EV_CMD_COMPLETE;
1817         hdr->plen = sizeof(*evt) + 1;
1818 
1819         evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt));
1820         evt->ncmd = 0x01;
1821         evt->opcode = cpu_to_le16(opcode);
1822 
1823         *skb_put(skb, 1) = 0x00;
1824 
1825         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
1826 
1827         return hci_recv_frame(hdev, skb);
1828 }
1829 
1830 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
1831                                  int count)
1832 {
1833         /* When the device is in bootloader mode, then it can send
1834          * events via the bulk endpoint. These events are treated the
1835          * same way as the ones received from the interrupt endpoint.
1836          */
1837         if (test_bit(BTUSB_BOOTLOADER, &data->flags))
1838                 return btusb_recv_intr(data, buffer, count);
1839 
1840         return btusb_recv_bulk(data, buffer, count);
1841 }
1842 
1843 static void btusb_intel_bootup(struct btusb_data *data, const void *ptr,
1844                                unsigned int len)
1845 {
1846         const struct intel_bootup *evt = ptr;
1847 
1848         if (len != sizeof(*evt))
1849                 return;
1850 
1851         if (test_and_clear_bit(BTUSB_BOOTING, &data->flags)) {
1852                 smp_mb__after_atomic();
1853                 wake_up_bit(&data->flags, BTUSB_BOOTING);
1854         }
1855 }
1856 
1857 static void btusb_intel_secure_send_result(struct btusb_data *data,
1858                                            const void *ptr, unsigned int len)
1859 {
1860         const struct intel_secure_send_result *evt = ptr;
1861 
1862         if (len != sizeof(*evt))
1863                 return;
1864 
1865         if (evt->result)
1866                 set_bit(BTUSB_FIRMWARE_FAILED, &data->flags);
1867 
1868         if (test_and_clear_bit(BTUSB_DOWNLOADING, &data->flags) &&
1869             test_bit(BTUSB_FIRMWARE_LOADED, &data->flags)) {
1870                 smp_mb__after_atomic();
1871                 wake_up_bit(&data->flags, BTUSB_DOWNLOADING);
1872         }
1873 }
1874 
1875 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
1876 {
1877         struct btusb_data *data = hci_get_drvdata(hdev);
1878 
1879         if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1880                 struct hci_event_hdr *hdr = (void *)skb->data;
1881 
1882                 if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
1883                     hdr->plen > 0) {
1884                         const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
1885                         unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
1886 
1887                         switch (skb->data[2]) {
1888                         case 0x02:
1889                                 /* When switching to the operational firmware
1890                                  * the device sends a vendor specific event
1891                                  * indicating that the bootup completed.
1892                                  */
1893                                 btusb_intel_bootup(data, ptr, len);
1894                                 break;
1895                         case 0x06:
1896                                 /* When the firmware loading completes the
1897                                  * device sends out a vendor specific event
1898                                  * indicating the result of the firmware
1899                                  * loading.
1900                                  */
1901                                 btusb_intel_secure_send_result(data, ptr, len);
1902                                 break;
1903                         }
1904                 }
1905         }
1906 
1907         return hci_recv_frame(hdev, skb);
1908 }
1909 
1910 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
1911 {
1912         struct btusb_data *data = hci_get_drvdata(hdev);
1913         struct urb *urb;
1914 
1915         BT_DBG("%s", hdev->name);
1916 
1917         switch (hci_skb_pkt_type(skb)) {
1918         case HCI_COMMAND_PKT:
1919                 if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1920                         struct hci_command_hdr *cmd = (void *)skb->data;
1921                         __u16 opcode = le16_to_cpu(cmd->opcode);
1922 
1923                         /* When in bootloader mode and the command 0xfc09
1924                          * is received, it needs to be send down the
1925                          * bulk endpoint. So allocate a bulk URB instead.
1926                          */
1927                         if (opcode == 0xfc09)
1928                                 urb = alloc_bulk_urb(hdev, skb);
1929                         else
1930                                 urb = alloc_ctrl_urb(hdev, skb);
1931 
1932                         /* When the 0xfc01 command is issued to boot into
1933                          * the operational firmware, it will actually not
1934                          * send a command complete event. To keep the flow
1935                          * control working inject that event here.
1936                          */
1937                         if (opcode == 0xfc01)
1938                                 inject_cmd_complete(hdev, opcode);
1939                 } else {
1940                         urb = alloc_ctrl_urb(hdev, skb);
1941                 }
1942                 if (IS_ERR(urb))
1943                         return PTR_ERR(urb);
1944 
1945                 hdev->stat.cmd_tx++;
1946                 return submit_or_queue_tx_urb(hdev, urb);
1947 
1948         case HCI_ACLDATA_PKT:
1949                 urb = alloc_bulk_urb(hdev, skb);
1950                 if (IS_ERR(urb))
1951                         return PTR_ERR(urb);
1952 
1953                 hdev->stat.acl_tx++;
1954                 return submit_or_queue_tx_urb(hdev, urb);
1955 
1956         case HCI_SCODATA_PKT:
1957                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1958                         return -ENODEV;
1959 
1960                 urb = alloc_isoc_urb(hdev, skb);
1961                 if (IS_ERR(urb))
1962                         return PTR_ERR(urb);
1963 
1964                 hdev->stat.sco_tx++;
1965                 return submit_tx_urb(hdev, urb);
1966         }
1967 
1968         return -EILSEQ;
1969 }
1970 
1971 static int btusb_setup_intel_new(struct hci_dev *hdev)
1972 {
1973         static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01,
1974                                           0x00, 0x08, 0x04, 0x00 };
1975         struct btusb_data *data = hci_get_drvdata(hdev);
1976         struct sk_buff *skb;
1977         struct intel_version ver;
1978         struct intel_boot_params *params;
1979         const struct firmware *fw;
1980         const u8 *fw_ptr;
1981         u32 frag_len;
1982         char fwname[64];
1983         ktime_t calltime, delta, rettime;
1984         unsigned long long duration;
1985         int err;
1986 
1987         BT_DBG("%s", hdev->name);
1988 
1989         calltime = ktime_get();
1990 
1991         /* Read the Intel version information to determine if the device
1992          * is in bootloader mode or if it already has operational firmware
1993          * loaded.
1994          */
1995         err = btintel_read_version(hdev, &ver);
1996         if (err)
1997                 return err;
1998 
1999         /* The hardware platform number has a fixed value of 0x37 and
2000          * for now only accept this single value.
2001          */
2002         if (ver.hw_platform != 0x37) {
2003                 BT_ERR("%s: Unsupported Intel hardware platform (%u)",
2004                        hdev->name, ver.hw_platform);
2005                 return -EINVAL;
2006         }
2007 
2008         /* At the moment the iBT 3.0 hardware variants 0x0b (LnP/SfP)
2009          * and 0x0c (WsP) are supported by this firmware loading method.
2010          *
2011          * This check has been put in place to ensure correct forward
2012          * compatibility options when newer hardware variants come along.
2013          */
2014         if (ver.hw_variant != 0x0b && ver.hw_variant != 0x0c) {
2015                 BT_ERR("%s: Unsupported Intel hardware variant (%u)",
2016                        hdev->name, ver.hw_variant);
2017                 return -EINVAL;
2018         }
2019 
2020         btintel_version_info(hdev, &ver);
2021 
2022         /* The firmware variant determines if the device is in bootloader
2023          * mode or is running operational firmware. The value 0x06 identifies
2024          * the bootloader and the value 0x23 identifies the operational
2025          * firmware.
2026          *
2027          * When the operational firmware is already present, then only
2028          * the check for valid Bluetooth device address is needed. This
2029          * determines if the device will be added as configured or
2030          * unconfigured controller.
2031          *
2032          * It is not possible to use the Secure Boot Parameters in this
2033          * case since that command is only available in bootloader mode.
2034          */
2035         if (ver.fw_variant == 0x23) {
2036                 clear_bit(BTUSB_BOOTLOADER, &data->flags);
2037                 btintel_check_bdaddr(hdev);
2038                 return 0;
2039         }
2040 
2041         /* If the device is not in bootloader mode, then the only possible
2042          * choice is to return an error and abort the device initialization.
2043          */
2044         if (ver.fw_variant != 0x06) {
2045                 BT_ERR("%s: Unsupported Intel firmware variant (%u)",
2046                        hdev->name, ver.fw_variant);
2047                 return -ENODEV;
2048         }
2049 
2050         /* Read the secure boot parameters to identify the operating
2051          * details of the bootloader.
2052          */
2053         skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
2054         if (IS_ERR(skb)) {
2055                 BT_ERR("%s: Reading Intel boot parameters failed (%ld)",
2056                        hdev->name, PTR_ERR(skb));
2057                 return PTR_ERR(skb);
2058         }
2059 
2060         if (skb->len != sizeof(*params)) {
2061                 BT_ERR("%s: Intel boot parameters size mismatch", hdev->name);
2062                 kfree_skb(skb);
2063                 return -EILSEQ;
2064         }
2065 
2066         params = (struct intel_boot_params *)skb->data;
2067 
2068         BT_INFO("%s: Device revision is %u", hdev->name,
2069                 le16_to_cpu(params->dev_revid));
2070 
2071         BT_INFO("%s: Secure boot is %s", hdev->name,
2072                 params->secure_boot ? "enabled" : "disabled");
2073 
2074         BT_INFO("%s: OTP lock is %s", hdev->name,
2075                 params->otp_lock ? "enabled" : "disabled");
2076 
2077         BT_INFO("%s: API lock is %s", hdev->name,
2078                 params->api_lock ? "enabled" : "disabled");
2079 
2080         BT_INFO("%s: Debug lock is %s", hdev->name,
2081                 params->debug_lock ? "enabled" : "disabled");
2082 
2083         BT_INFO("%s: Minimum firmware build %u week %u %u", hdev->name,
2084                 params->min_fw_build_nn, params->min_fw_build_cw,
2085                 2000 + params->min_fw_build_yy);
2086 
2087         /* It is required that every single firmware fragment is acknowledged
2088          * with a command complete event. If the boot parameters indicate
2089          * that this bootloader does not send them, then abort the setup.
2090          */
2091         if (params->limited_cce != 0x00) {
2092                 BT_ERR("%s: Unsupported Intel firmware loading method (%u)",
2093                        hdev->name, params->limited_cce);
2094                 kfree_skb(skb);
2095                 return -EINVAL;
2096         }
2097 
2098         /* If the OTP has no valid Bluetooth device address, then there will
2099          * also be no valid address for the operational firmware.
2100          */
2101         if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
2102                 BT_INFO("%s: No device address configured", hdev->name);
2103                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
2104         }
2105 
2106         /* With this Intel bootloader only the hardware variant and device
2107          * revision information are used to select the right firmware.
2108          *
2109          * The firmware filename is ibt-<hw_variant>-<dev_revid>.sfi.
2110          *
2111          * Currently the supported hardware variants are:
2112          *   11 (0x0b) for iBT3.0 (LnP/SfP)
2113          *   12 (0x0c) for iBT3.5 (WsP)
2114          */
2115         snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u.sfi",
2116                  le16_to_cpu(ver.hw_variant),
2117                  le16_to_cpu(params->dev_revid));
2118 
2119         err = request_firmware(&fw, fwname, &hdev->dev);
2120         if (err < 0) {
2121                 BT_ERR("%s: Failed to load Intel firmware file (%d)",
2122                        hdev->name, err);
2123                 kfree_skb(skb);
2124                 return err;
2125         }
2126 
2127         BT_INFO("%s: Found device firmware: %s", hdev->name, fwname);
2128 
2129         /* Save the DDC file name for later use to apply once the firmware
2130          * downloading is done.
2131          */
2132         snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u.ddc",
2133                  le16_to_cpu(ver.hw_variant),
2134                  le16_to_cpu(params->dev_revid));
2135 
2136         kfree_skb(skb);
2137 
2138         if (fw->size < 644) {
2139                 BT_ERR("%s: Invalid size of firmware file (%zu)",
2140                        hdev->name, fw->size);
2141                 err = -EBADF;
2142                 goto done;
2143         }
2144 
2145         set_bit(BTUSB_DOWNLOADING, &data->flags);
2146 
2147         /* Start the firmware download transaction with the Init fragment
2148          * represented by the 128 bytes of CSS header.
2149          */
2150         err = btintel_secure_send(hdev, 0x00, 128, fw->data);
2151         if (err < 0) {
2152                 BT_ERR("%s: Failed to send firmware header (%d)",
2153                        hdev->name, err);
2154                 goto done;
2155         }
2156 
2157         /* Send the 256 bytes of public key information from the firmware
2158          * as the PKey fragment.
2159          */
2160         err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
2161         if (err < 0) {
2162                 BT_ERR("%s: Failed to send firmware public key (%d)",
2163                        hdev->name, err);
2164                 goto done;
2165         }
2166 
2167         /* Send the 256 bytes of signature information from the firmware
2168          * as the Sign fragment.
2169          */
2170         err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
2171         if (err < 0) {
2172                 BT_ERR("%s: Failed to send firmware signature (%d)",
2173                        hdev->name, err);
2174                 goto done;
2175         }
2176 
2177         fw_ptr = fw->data + 644;
2178         frag_len = 0;
2179 
2180         while (fw_ptr - fw->data < fw->size) {
2181                 struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
2182 
2183                 frag_len += sizeof(*cmd) + cmd->plen;
2184 
2185                 /* The parameter length of the secure send command requires
2186                  * a 4 byte alignment. It happens so that the firmware file
2187                  * contains proper Intel_NOP commands to align the fragments
2188                  * as needed.
2189                  *
2190                  * Send set of commands with 4 byte alignment from the
2191                  * firmware data buffer as a single Data fragement.
2192                  */
2193                 if (!(frag_len % 4)) {
2194                         err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
2195                         if (err < 0) {
2196                                 BT_ERR("%s: Failed to send firmware data (%d)",
2197                                        hdev->name, err);
2198                                 goto done;
2199                         }
2200 
2201                         fw_ptr += frag_len;
2202                         frag_len = 0;
2203                 }
2204         }
2205 
2206         set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
2207 
2208         BT_INFO("%s: Waiting for firmware download to complete", hdev->name);
2209 
2210         /* Before switching the device into operational mode and with that
2211          * booting the loaded firmware, wait for the bootloader notification
2212          * that all fragments have been successfully received.
2213          *
2214          * When the event processing receives the notification, then the
2215          * BTUSB_DOWNLOADING flag will be cleared.
2216          *
2217          * The firmware loading should not take longer than 5 seconds
2218          * and thus just timeout if that happens and fail the setup
2219          * of this device.
2220          */
2221         err = wait_on_bit_timeout(&data->flags, BTUSB_DOWNLOADING,
2222                                   TASK_INTERRUPTIBLE,
2223                                   msecs_to_jiffies(5000));
2224         if (err == 1) {
2225                 BT_ERR("%s: Firmware loading interrupted", hdev->name);
2226                 err = -EINTR;
2227                 goto done;
2228         }
2229 
2230         if (err) {
2231                 BT_ERR("%s: Firmware loading timeout", hdev->name);
2232                 err = -ETIMEDOUT;
2233                 goto done;
2234         }
2235 
2236         if (test_bit(BTUSB_FIRMWARE_FAILED, &data->flags)) {
2237                 BT_ERR("%s: Firmware loading failed", hdev->name);
2238                 err = -ENOEXEC;
2239                 goto done;
2240         }
2241 
2242         rettime = ktime_get();
2243         delta = ktime_sub(rettime, calltime);
2244         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2245 
2246         BT_INFO("%s: Firmware loaded in %llu usecs", hdev->name, duration);
2247 
2248 done:
2249         release_firmware(fw);
2250 
2251         if (err < 0)
2252                 return err;
2253 
2254         calltime = ktime_get();
2255 
2256         set_bit(BTUSB_BOOTING, &data->flags);
2257 
2258         skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(reset_param), reset_param,
2259                              HCI_INIT_TIMEOUT);
2260         if (IS_ERR(skb))
2261                 return PTR_ERR(skb);
2262 
2263         kfree_skb(skb);
2264 
2265         /* The bootloader will not indicate when the device is ready. This
2266          * is done by the operational firmware sending bootup notification.
2267          *
2268          * Booting into operational firmware should not take longer than
2269          * 1 second. However if that happens, then just fail the setup
2270          * since something went wrong.
2271          */
2272         BT_INFO("%s: Waiting for device to boot", hdev->name);
2273 
2274         err = wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,
2275                                   TASK_INTERRUPTIBLE,
2276                                   msecs_to_jiffies(1000));
2277 
2278         if (err == 1) {
2279                 BT_ERR("%s: Device boot interrupted", hdev->name);
2280                 return -EINTR;
2281         }
2282 
2283         if (err) {
2284                 BT_ERR("%s: Device boot timeout", hdev->name);
2285                 return -ETIMEDOUT;
2286         }
2287 
2288         rettime = ktime_get();
2289         delta = ktime_sub(rettime, calltime);
2290         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2291 
2292         BT_INFO("%s: Device booted in %llu usecs", hdev->name, duration);
2293 
2294         clear_bit(BTUSB_BOOTLOADER, &data->flags);
2295 
2296         /* Once the device is running in operational mode, it needs to apply
2297          * the device configuration (DDC) parameters.
2298          *
2299          * The device can work without DDC parameters, so even if it fails
2300          * to load the file, no need to fail the setup.
2301          */
2302         btintel_load_ddc_config(hdev, fwname);
2303 
2304         /* Set the event mask for Intel specific vendor events. This enables
2305          * a few extra events that are useful during general operation. It
2306          * does not enable any debugging related events.
2307          *
2308          * The device will function correctly without these events enabled
2309          * and thus no need to fail the setup.
2310          */
2311         btintel_set_event_mask(hdev, false);
2312 
2313         return 0;
2314 }
2315 
2316 static int btusb_shutdown_intel(struct hci_dev *hdev)
2317 {
2318         struct sk_buff *skb;
2319         long ret;
2320 
2321         /* Some platforms have an issue with BT LED when the interface is
2322          * down or BT radio is turned off, which takes 5 seconds to BT LED
2323          * goes off. This command turns off the BT LED immediately.
2324          */
2325         skb = __hci_cmd_sync(hdev, 0xfc3f, 0, NULL, HCI_INIT_TIMEOUT);
2326         if (IS_ERR(skb)) {
2327                 ret = PTR_ERR(skb);
2328                 BT_ERR("%s: turning off Intel device LED failed (%ld)",
2329                        hdev->name, ret);
2330                 return ret;
2331         }
2332         kfree_skb(skb);
2333 
2334         return 0;
2335 }
2336 
2337 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
2338                                     const bdaddr_t *bdaddr)
2339 {
2340         struct sk_buff *skb;
2341         u8 buf[8];
2342         long ret;
2343 
2344         buf[0] = 0xfe;
2345         buf[1] = sizeof(bdaddr_t);
2346         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
2347 
2348         skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2349         if (IS_ERR(skb)) {
2350                 ret = PTR_ERR(skb);
2351                 BT_ERR("%s: changing Marvell device address failed (%ld)",
2352                        hdev->name, ret);
2353                 return ret;
2354         }
2355         kfree_skb(skb);
2356 
2357         return 0;
2358 }
2359 
2360 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
2361                                     const bdaddr_t *bdaddr)
2362 {
2363         struct sk_buff *skb;
2364         u8 buf[10];
2365         long ret;
2366 
2367         buf[0] = 0x01;
2368         buf[1] = 0x01;
2369         buf[2] = 0x00;
2370         buf[3] = sizeof(bdaddr_t);
2371         memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
2372 
2373         skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2374         if (IS_ERR(skb)) {
2375                 ret = PTR_ERR(skb);
2376                 BT_ERR("%s: Change address command failed (%ld)",
2377                        hdev->name, ret);
2378                 return ret;
2379         }
2380         kfree_skb(skb);
2381 
2382         return 0;
2383 }
2384 
2385 #define QCA_DFU_PACKET_LEN      4096
2386 
2387 #define QCA_GET_TARGET_VERSION  0x09
2388 #define QCA_CHECK_STATUS        0x05
2389 #define QCA_DFU_DOWNLOAD        0x01
2390 
2391 #define QCA_SYSCFG_UPDATED      0x40
2392 #define QCA_PATCH_UPDATED       0x80
2393 #define QCA_DFU_TIMEOUT         3000
2394 
2395 struct qca_version {
2396         __le32  rom_version;
2397         __le32  patch_version;
2398         __le32  ram_version;
2399         __le32  ref_clock;
2400         __u8    reserved[4];
2401 } __packed;
2402 
2403 struct qca_rampatch_version {
2404         __le16  rom_version;
2405         __le16  patch_version;
2406 } __packed;
2407 
2408 struct qca_device_info {
2409         u32     rom_version;
2410         u8      rampatch_hdr;   /* length of header in rampatch */
2411         u8      nvm_hdr;        /* length of header in NVM */
2412         u8      ver_offset;     /* offset of version structure in rampatch */
2413 };
2414 
2415 static const struct qca_device_info qca_devices_table[] = {
2416         { 0x00000100, 20, 4, 10 }, /* Rome 1.0 */
2417         { 0x00000101, 20, 4, 10 }, /* Rome 1.1 */
2418         { 0x00000200, 28, 4, 18 }, /* Rome 2.0 */
2419         { 0x00000201, 28, 4, 18 }, /* Rome 2.1 */
2420         { 0x00000300, 28, 4, 18 }, /* Rome 3.0 */
2421         { 0x00000302, 28, 4, 18 }, /* Rome 3.2 */
2422 };
2423 
2424 static int btusb_qca_send_vendor_req(struct hci_dev *hdev, u8 request,
2425                                      void *data, u16 size)
2426 {
2427         struct btusb_data *btdata = hci_get_drvdata(hdev);
2428         struct usb_device *udev = btdata->udev;
2429         int pipe, err;
2430         u8 *buf;
2431 
2432         buf = kmalloc(size, GFP_KERNEL);
2433         if (!buf)
2434                 return -ENOMEM;
2435 
2436         /* Found some of USB hosts have IOT issues with ours so that we should
2437          * not wait until HCI layer is ready.
2438          */
2439         pipe = usb_rcvctrlpipe(udev, 0);
2440         err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
2441                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
2442         if (err < 0) {
2443                 BT_ERR("%s: Failed to access otp area (%d)", hdev->name, err);
2444                 goto done;
2445         }
2446 
2447         memcpy(data, buf, size);
2448 
2449 done:
2450         kfree(buf);
2451 
2452         return err;
2453 }
2454 
2455 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
2456                                        const struct firmware *firmware,
2457                                        size_t hdr_size)
2458 {
2459         struct btusb_data *btdata = hci_get_drvdata(hdev);
2460         struct usb_device *udev = btdata->udev;
2461         size_t count, size, sent = 0;
2462         int pipe, len, err;
2463         u8 *buf;
2464 
2465         buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
2466         if (!buf)
2467                 return -ENOMEM;
2468 
2469         count = firmware->size;
2470 
2471         size = min_t(size_t, count, hdr_size);
2472         memcpy(buf, firmware->data, size);
2473 
2474         /* USB patches should go down to controller through USB path
2475          * because binary format fits to go down through USB channel.
2476          * USB control path is for patching headers and USB bulk is for
2477          * patch body.
2478          */
2479         pipe = usb_sndctrlpipe(udev, 0);
2480         err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
2481                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
2482         if (err < 0) {
2483                 BT_ERR("%s: Failed to send headers (%d)", hdev->name, err);
2484                 goto done;
2485         }
2486 
2487         sent += size;
2488         count -= size;
2489 
2490         while (count) {
2491                 size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
2492 
2493                 memcpy(buf, firmware->data + sent, size);
2494 
2495                 pipe = usb_sndbulkpipe(udev, 0x02);
2496                 err = usb_bulk_msg(udev, pipe, buf, size, &len,
2497                                    QCA_DFU_TIMEOUT);
2498                 if (err < 0) {
2499                         BT_ERR("%s: Failed to send body at %zd of %zd (%d)",
2500                                hdev->name, sent, firmware->size, err);
2501                         break;
2502                 }
2503 
2504                 if (size != len) {
2505                         BT_ERR("%s: Failed to get bulk buffer", hdev->name);
2506                         err = -EILSEQ;
2507                         break;
2508                 }
2509 
2510                 sent  += size;
2511                 count -= size;
2512         }
2513 
2514 done:
2515         kfree(buf);
2516         return err;
2517 }
2518 
2519 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
2520                                          struct qca_version *ver,
2521                                          const struct qca_device_info *info)
2522 {
2523         struct qca_rampatch_version *rver;
2524         const struct firmware *fw;
2525         u32 ver_rom, ver_patch;
2526         u16 rver_rom, rver_patch;
2527         char fwname[64];
2528         int err;
2529 
2530         ver_rom = le32_to_cpu(ver->rom_version);
2531         ver_patch = le32_to_cpu(ver->patch_version);
2532 
2533         snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
2534 
2535         err = request_firmware(&fw, fwname, &hdev->dev);
2536         if (err) {
2537                 BT_ERR("%s: failed to request rampatch file: %s (%d)",
2538                        hdev->name, fwname, err);
2539                 return err;
2540         }
2541 
2542         BT_INFO("%s: using rampatch file: %s", hdev->name, fwname);
2543 
2544         rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
2545         rver_rom = le16_to_cpu(rver->rom_version);
2546         rver_patch = le16_to_cpu(rver->patch_version);
2547 
2548         BT_INFO("%s: QCA: patch rome 0x%x build 0x%x, firmware rome 0x%x "
2549                 "build 0x%x", hdev->name, rver_rom, rver_patch, ver_rom,
2550                 ver_patch);
2551 
2552         if (rver_rom != ver_rom || rver_patch <= ver_patch) {
2553                 BT_ERR("%s: rampatch file version did not match with firmware",
2554                        hdev->name);
2555                 err = -EINVAL;
2556                 goto done;
2557         }
2558 
2559         err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
2560 
2561 done:
2562         release_firmware(fw);
2563 
2564         return err;
2565 }
2566 
2567 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
2568                                     struct qca_version *ver,
2569                                     const struct qca_device_info *info)
2570 {
2571         const struct firmware *fw;
2572         char fwname[64];
2573         int err;
2574 
2575         snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin",
2576                  le32_to_cpu(ver->rom_version));
2577 
2578         err = request_firmware(&fw, fwname, &hdev->dev);
2579         if (err) {
2580                 BT_ERR("%s: failed to request NVM file: %s (%d)",
2581                        hdev->name, fwname, err);
2582                 return err;
2583         }
2584 
2585         BT_INFO("%s: using NVM file: %s", hdev->name, fwname);
2586 
2587         err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
2588 
2589         release_firmware(fw);
2590 
2591         return err;
2592 }
2593 
2594 static int btusb_setup_qca(struct hci_dev *hdev)
2595 {
2596         const struct qca_device_info *info = NULL;
2597         struct qca_version ver;
2598         u32 ver_rom;
2599         u8 status;
2600         int i, err;
2601 
2602         err = btusb_qca_send_vendor_req(hdev, QCA_GET_TARGET_VERSION, &ver,
2603                                         sizeof(ver));
2604         if (err < 0)
2605                 return err;
2606 
2607         ver_rom = le32_to_cpu(ver.rom_version);
2608         for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
2609                 if (ver_rom == qca_devices_table[i].rom_version)
2610                         info = &qca_devices_table[i];
2611         }
2612         if (!info) {
2613                 BT_ERR("%s: don't support firmware rome 0x%x", hdev->name,
2614                        ver_rom);
2615                 return -ENODEV;
2616         }
2617 
2618         err = btusb_qca_send_vendor_req(hdev, QCA_CHECK_STATUS, &status,
2619                                         sizeof(status));
2620         if (err < 0)
2621                 return err;
2622 
2623         if (!(status & QCA_PATCH_UPDATED)) {
2624                 err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
2625                 if (err < 0)
2626                         return err;
2627         }
2628 
2629         if (!(status & QCA_SYSCFG_UPDATED)) {
2630                 err = btusb_setup_qca_load_nvm(hdev, &ver, info);
2631                 if (err < 0)
2632                         return err;
2633         }
2634 
2635         return 0;
2636 }
2637 
2638 #ifdef CONFIG_BT_HCIBTUSB_BCM
2639 static inline int __set_diag_interface(struct hci_dev *hdev)
2640 {
2641         struct btusb_data *data = hci_get_drvdata(hdev);
2642         struct usb_interface *intf = data->diag;
2643         int i;
2644 
2645         if (!data->diag)
2646                 return -ENODEV;
2647 
2648         data->diag_tx_ep = NULL;
2649         data->diag_rx_ep = NULL;
2650 
2651         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2652                 struct usb_endpoint_descriptor *ep_desc;
2653 
2654                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2655 
2656                 if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
2657                         data->diag_tx_ep = ep_desc;
2658                         continue;
2659                 }
2660 
2661                 if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
2662                         data->diag_rx_ep = ep_desc;
2663                         continue;
2664                 }
2665         }
2666 
2667         if (!data->diag_tx_ep || !data->diag_rx_ep) {
2668                 BT_ERR("%s invalid diagnostic descriptors", hdev->name);
2669                 return -ENODEV;
2670         }
2671 
2672         return 0;
2673 }
2674 
2675 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
2676 {
2677         struct btusb_data *data = hci_get_drvdata(hdev);
2678         struct sk_buff *skb;
2679         struct urb *urb;
2680         unsigned int pipe;
2681 
2682         if (!data->diag_tx_ep)
2683                 return ERR_PTR(-ENODEV);
2684 
2685         urb = usb_alloc_urb(0, GFP_KERNEL);
2686         if (!urb)
2687                 return ERR_PTR(-ENOMEM);
2688 
2689         skb = bt_skb_alloc(2, GFP_KERNEL);
2690         if (!skb) {
2691                 usb_free_urb(urb);
2692                 return ERR_PTR(-ENOMEM);
2693         }
2694 
2695         *skb_put(skb, 1) = 0xf0;
2696         *skb_put(skb, 1) = enable;
2697 
2698         pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
2699 
2700         usb_fill_bulk_urb(urb, data->udev, pipe,
2701                           skb->data, skb->len, btusb_tx_complete, skb);
2702 
2703         skb->dev = (void *)hdev;
2704 
2705         return urb;
2706 }
2707 
2708 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
2709 {
2710         struct btusb_data *data = hci_get_drvdata(hdev);
2711         struct urb *urb;
2712 
2713         if (!data->diag)
2714                 return -ENODEV;
2715 
2716         if (!test_bit(HCI_RUNNING, &hdev->flags))
2717                 return -ENETDOWN;
2718 
2719         urb = alloc_diag_urb(hdev, enable);
2720         if (IS_ERR(urb))
2721                 return PTR_ERR(urb);
2722 
2723         return submit_or_queue_tx_urb(hdev, urb);
2724 }
2725 #endif
2726 
2727 static int btusb_probe(struct usb_interface *intf,
2728                        const struct usb_device_id *id)
2729 {
2730         struct usb_endpoint_descriptor *ep_desc;
2731         struct btusb_data *data;
2732         struct hci_dev *hdev;
2733         unsigned ifnum_base;
2734         int i, err;
2735 
2736         BT_DBG("intf %p id %p", intf, id);
2737 
2738         /* interface numbers are hardcoded in the spec */
2739         if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
2740                 if (!(id->driver_info & BTUSB_IFNUM_2))
2741                         return -ENODEV;
2742                 if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
2743                         return -ENODEV;
2744         }
2745 
2746         ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
2747 
2748         if (!id->driver_info) {
2749                 const struct usb_device_id *match;
2750 
2751                 match = usb_match_id(intf, blacklist_table);
2752                 if (match)
2753                         id = match;
2754         }
2755 
2756         if (id->driver_info == BTUSB_IGNORE)
2757                 return -ENODEV;
2758 
2759         if (id->driver_info & BTUSB_ATH3012) {
2760                 struct usb_device *udev = interface_to_usbdev(intf);
2761 
2762                 /* Old firmware would otherwise let ath3k driver load
2763                  * patch and sysconfig files */
2764                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
2765                         return -ENODEV;
2766         }
2767 
2768         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
2769         if (!data)
2770                 return -ENOMEM;
2771 
2772         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2773                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2774 
2775                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
2776                         data->intr_ep = ep_desc;
2777                         continue;
2778                 }
2779 
2780                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
2781                         data->bulk_tx_ep = ep_desc;
2782                         continue;
2783                 }
2784 
2785                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
2786                         data->bulk_rx_ep = ep_desc;
2787                         continue;
2788                 }
2789         }
2790 
2791         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
2792                 return -ENODEV;
2793 
2794         if (id->driver_info & BTUSB_AMP) {
2795                 data->cmdreq_type = USB_TYPE_CLASS | 0x01;
2796                 data->cmdreq = 0x2b;
2797         } else {
2798                 data->cmdreq_type = USB_TYPE_CLASS;
2799                 data->cmdreq = 0x00;
2800         }
2801 
2802         data->udev = interface_to_usbdev(intf);
2803         data->intf = intf;
2804 
2805         INIT_WORK(&data->work, btusb_work);
2806         INIT_WORK(&data->waker, btusb_waker);
2807         init_usb_anchor(&data->deferred);
2808         init_usb_anchor(&data->tx_anchor);
2809         spin_lock_init(&data->txlock);
2810 
2811         init_usb_anchor(&data->intr_anchor);
2812         init_usb_anchor(&data->bulk_anchor);
2813         init_usb_anchor(&data->isoc_anchor);
2814         init_usb_anchor(&data->diag_anchor);
2815         spin_lock_init(&data->rxlock);
2816 
2817         if (id->driver_info & BTUSB_INTEL_NEW) {
2818                 data->recv_event = btusb_recv_event_intel;
2819                 data->recv_bulk = btusb_recv_bulk_intel;
2820                 set_bit(BTUSB_BOOTLOADER, &data->flags);
2821         } else {
2822                 data->recv_event = hci_recv_frame;
2823                 data->recv_bulk = btusb_recv_bulk;
2824         }
2825 
2826         hdev = hci_alloc_dev();
2827         if (!hdev)
2828                 return -ENOMEM;
2829 
2830         hdev->bus = HCI_USB;
2831         hci_set_drvdata(hdev, data);
2832 
2833         if (id->driver_info & BTUSB_AMP)
2834                 hdev->dev_type = HCI_AMP;
2835         else
2836                 hdev->dev_type = HCI_PRIMARY;
2837 
2838         data->hdev = hdev;
2839 
2840         SET_HCIDEV_DEV(hdev, &intf->dev);
2841 
2842         hdev->open   = btusb_open;
2843         hdev->close  = btusb_close;
2844         hdev->flush  = btusb_flush;
2845         hdev->send   = btusb_send_frame;
2846         hdev->notify = btusb_notify;
2847 
2848         if (id->driver_info & BTUSB_BCM2045)
2849                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
2850 
2851         if (id->driver_info & BTUSB_BCM92035)
2852                 hdev->setup = btusb_setup_bcm92035;
2853 
2854 #ifdef CONFIG_BT_HCIBTUSB_BCM
2855         if (id->driver_info & BTUSB_BCM_PATCHRAM) {
2856                 hdev->manufacturer = 15;
2857                 hdev->setup = btbcm_setup_patchram;
2858                 hdev->set_diag = btusb_bcm_set_diag;
2859                 hdev->set_bdaddr = btbcm_set_bdaddr;
2860 
2861                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
2862                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
2863         }
2864 
2865         if (id->driver_info & BTUSB_BCM_APPLE) {
2866                 hdev->manufacturer = 15;
2867                 hdev->setup = btbcm_setup_apple;
2868                 hdev->set_diag = btusb_bcm_set_diag;
2869 
2870                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
2871                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
2872         }
2873 #endif
2874 
2875         if (id->driver_info & BTUSB_INTEL) {
2876                 hdev->manufacturer = 2;
2877                 hdev->setup = btusb_setup_intel;
2878                 hdev->shutdown = btusb_shutdown_intel;
2879                 hdev->set_diag = btintel_set_diag_mfg;
2880                 hdev->set_bdaddr = btintel_set_bdaddr;
2881                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2882                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2883                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
2884         }
2885 
2886         if (id->driver_info & BTUSB_INTEL_NEW) {
2887                 hdev->manufacturer = 2;
2888                 hdev->send = btusb_send_frame_intel;
2889                 hdev->setup = btusb_setup_intel_new;
2890                 hdev->hw_error = btintel_hw_error;
2891                 hdev->set_diag = btintel_set_diag;
2892                 hdev->set_bdaddr = btintel_set_bdaddr;
2893                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2894                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
2895         }
2896 
2897         if (id->driver_info & BTUSB_MARVELL)
2898                 hdev->set_bdaddr = btusb_set_bdaddr_marvell;
2899 
2900         if (id->driver_info & BTUSB_SWAVE) {
2901                 set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
2902                 set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
2903         }
2904 
2905         if (id->driver_info & BTUSB_INTEL_BOOT) {
2906                 hdev->manufacturer = 2;
2907                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
2908         }
2909 
2910         if (id->driver_info & BTUSB_ATH3012) {
2911                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
2912                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2913                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2914         }
2915 
2916         if (id->driver_info & BTUSB_QCA_ROME) {
2917                 data->setup_on_usb = btusb_setup_qca;
2918                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
2919         }
2920 
2921 #ifdef CONFIG_BT_HCIBTUSB_RTL
2922         if (id->driver_info & BTUSB_REALTEK) {
2923                 hdev->setup = btrtl_setup_realtek;
2924 
2925                 /* Realtek devices lose their updated firmware over suspend,
2926                  * but the USB hub doesn't notice any status change.
2927                  * Explicitly request a device reset on resume.
2928                  */
2929                 set_bit(BTUSB_RESET_RESUME, &data->flags);
2930         }
2931 #endif
2932 
2933         if (id->driver_info & BTUSB_AMP) {
2934                 /* AMP controllers do not support SCO packets */
2935                 data->isoc = NULL;
2936         } else {
2937                 /* Interface orders are hardcoded in the specification */
2938                 data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
2939         }
2940 
2941         if (!reset)
2942                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2943 
2944         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
2945                 if (!disable_scofix)
2946                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
2947         }
2948 
2949         if (id->driver_info & BTUSB_BROKEN_ISOC)
2950                 data->isoc = NULL;
2951 
2952         if (id->driver_info & BTUSB_DIGIANSWER) {
2953                 data->cmdreq_type = USB_TYPE_VENDOR;
2954                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2955         }
2956 
2957         if (id->driver_info & BTUSB_CSR) {
2958                 struct usb_device *udev = data->udev;
2959                 u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
2960 
2961                 /* Old firmware would otherwise execute USB reset */
2962                 if (bcdDevice < 0x117)
2963                         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2964 
2965                 /* Fake CSR devices with broken commands */
2966                 if (bcdDevice <= 0x100 || bcdDevice == 0x134)
2967                         hdev->setup = btusb_setup_csr;
2968 
2969                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2970         }
2971 
2972         if (id->driver_info & BTUSB_SNIFFER) {
2973                 struct usb_device *udev = data->udev;
2974 
2975                 /* New sniffer firmware has crippled HCI interface */
2976                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
2977                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
2978         }
2979 
2980         if (id->driver_info & BTUSB_INTEL_BOOT) {
2981                 /* A bug in the bootloader causes that interrupt interface is
2982                  * only enabled after receiving SetInterface(0, AltSetting=0).
2983                  */
2984                 err = usb_set_interface(data->udev, 0, 0);
2985                 if (err < 0) {
2986                         BT_ERR("failed to set interface 0, alt 0 %d", err);
2987                         hci_free_dev(hdev);
2988                         return err;
2989                 }
2990         }
2991 
2992         if (data->isoc) {
2993                 err = usb_driver_claim_interface(&btusb_driver,
2994                                                  data->isoc, data);
2995                 if (err < 0) {
2996                         hci_free_dev(hdev);
2997                         return err;
2998                 }
2999         }
3000 
3001 #ifdef CONFIG_BT_HCIBTUSB_BCM
3002         if (data->diag) {
3003                 if (!usb_driver_claim_interface(&btusb_driver,
3004                                                 data->diag, data))
3005                         __set_diag_interface(hdev);
3006                 else
3007                         data->diag = NULL;
3008         }
3009 #endif
3010 
3011         err = hci_register_dev(hdev);
3012         if (err < 0) {
3013                 hci_free_dev(hdev);
3014                 return err;
3015         }
3016 
3017         usb_set_intfdata(intf, data);
3018 
3019         return 0;
3020 }
3021 
3022 static void btusb_disconnect(struct usb_interface *intf)
3023 {
3024         struct btusb_data *data = usb_get_intfdata(intf);
3025         struct hci_dev *hdev;
3026 
3027         BT_DBG("intf %p", intf);
3028 
3029         if (!data)
3030                 return;
3031 
3032         hdev = data->hdev;
3033         usb_set_intfdata(data->intf, NULL);
3034 
3035         if (data->isoc)
3036                 usb_set_intfdata(data->isoc, NULL);
3037 
3038         if (data->diag)
3039                 usb_set_intfdata(data->diag, NULL);
3040 
3041         hci_unregister_dev(hdev);
3042 
3043         if (intf == data->intf) {
3044                 if (data->isoc)
3045                         usb_driver_release_interface(&btusb_driver, data->isoc);
3046                 if (data->diag)
3047                         usb_driver_release_interface(&btusb_driver, data->diag);
3048         } else if (intf == data->isoc) {
3049                 if (data->diag)
3050                         usb_driver_release_interface(&btusb_driver, data->diag);
3051                 usb_driver_release_interface(&btusb_driver, data->intf);
3052         } else if (intf == data->diag) {
3053                 usb_driver_release_interface(&btusb_driver, data->intf);
3054                 if (data->isoc)
3055                         usb_driver_release_interface(&btusb_driver, data->isoc);
3056         }
3057 
3058         hci_free_dev(hdev);
3059 }
3060 
3061 #ifdef CONFIG_PM
3062 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
3063 {
3064         struct btusb_data *data = usb_get_intfdata(intf);
3065 
3066         BT_DBG("intf %p", intf);
3067 
3068         if (data->suspend_count++)
3069                 return 0;
3070 
3071         spin_lock_irq(&data->txlock);
3072         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
3073                 set_bit(BTUSB_SUSPENDING, &data->flags);
3074                 spin_unlock_irq(&data->txlock);
3075         } else {
3076                 spin_unlock_irq(&data->txlock);
3077                 data->suspend_count--;
3078                 return -EBUSY;
3079         }
3080 
3081         cancel_work_sync(&data->work);
3082 
3083         btusb_stop_traffic(data);
3084         usb_kill_anchored_urbs(&data->tx_anchor);
3085 
3086         /* Optionally request a device reset on resume, but only when
3087          * wakeups are disabled. If wakeups are enabled we assume the
3088          * device will stay powered up throughout suspend.
3089          */
3090         if (test_bit(BTUSB_RESET_RESUME, &data->flags) &&
3091             !device_may_wakeup(&data->udev->dev))
3092                 data->udev->reset_resume = 1;
3093 
3094         return 0;
3095 }
3096 
3097 static void play_deferred(struct btusb_data *data)
3098 {
3099         struct urb *urb;
3100         int err;
3101 
3102         while ((urb = usb_get_from_anchor(&data->deferred))) {
3103                 err = usb_submit_urb(urb, GFP_ATOMIC);
3104                 if (err < 0)
3105                         break;
3106 
3107                 data->tx_in_flight++;
3108         }
3109         usb_scuttle_anchored_urbs(&data->deferred);
3110 }
3111 
3112 static int btusb_resume(struct usb_interface *intf)
3113 {
3114         struct btusb_data *data = usb_get_intfdata(intf);
3115         struct hci_dev *hdev = data->hdev;
3116         int err = 0;
3117 
3118         BT_DBG("intf %p", intf);
3119 
3120         if (--data->suspend_count)
3121                 return 0;
3122 
3123         if (!test_bit(HCI_RUNNING, &hdev->flags))
3124                 goto done;
3125 
3126         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
3127                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
3128                 if (err < 0) {
3129                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
3130                         goto failed;
3131                 }
3132         }
3133 
3134         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
3135                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
3136                 if (err < 0) {
3137                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
3138                         goto failed;
3139                 }
3140 
3141                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
3142         }
3143 
3144         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
3145                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
3146                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
3147                 else
3148                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
3149         }
3150 
3151         spin_lock_irq(&data->txlock);
3152         play_deferred(data);
3153         clear_bit(BTUSB_SUSPENDING, &data->flags);
3154         spin_unlock_irq(&data->txlock);
3155         schedule_work(&data->work);
3156 
3157         return 0;
3158 
3159 failed:
3160         usb_scuttle_anchored_urbs(&data->deferred);
3161 done:
3162         spin_lock_irq(&data->txlock);
3163         clear_bit(BTUSB_SUSPENDING, &data->flags);
3164         spin_unlock_irq(&data->txlock);
3165 
3166         return err;
3167 }
3168 #endif
3169 
3170 static struct usb_driver btusb_driver = {
3171         .name           = "btusb",
3172         .probe          = btusb_probe,
3173         .disconnect     = btusb_disconnect,
3174 #ifdef CONFIG_PM
3175         .suspend        = btusb_suspend,
3176         .resume         = btusb_resume,
3177 #endif
3178         .id_table       = btusb_table,
3179         .supports_autosuspend = 1,
3180         .disable_hub_initiated_lpm = 1,
3181 };
3182 
3183 module_usb_driver(btusb_driver);
3184 
3185 module_param(disable_scofix, bool, 0644);
3186 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
3187 
3188 module_param(force_scofix, bool, 0644);
3189 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
3190 
3191 module_param(reset, bool, 0644);
3192 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
3193 
3194 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
3195 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
3196 MODULE_VERSION(VERSION);
3197 MODULE_LICENSE("GPL");
3198 

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