xref: /openbmc/linux/drivers/bluetooth/btusb.c (revision b159eecc)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *
4  *  Generic Bluetooth USB driver
5  *
6  *  Copyright (C) 2005-2008  Marcel Holtmann <marcel@holtmann.org>
7  */
8 
9 #include <linux/dmi.h>
10 #include <linux/module.h>
11 #include <linux/usb.h>
12 #include <linux/usb/quirks.h>
13 #include <linux/firmware.h>
14 #include <linux/iopoll.h>
15 #include <linux/of_device.h>
16 #include <linux/of_irq.h>
17 #include <linux/suspend.h>
18 #include <linux/gpio/consumer.h>
19 #include <asm/unaligned.h>
20 
21 #include <net/bluetooth/bluetooth.h>
22 #include <net/bluetooth/hci_core.h>
23 
24 #include "btintel.h"
25 #include "btbcm.h"
26 #include "btrtl.h"
27 
28 #define VERSION "0.8"
29 
30 static bool disable_scofix;
31 static bool force_scofix;
32 static bool enable_autosuspend = IS_ENABLED(CONFIG_BT_HCIBTUSB_AUTOSUSPEND);
33 
34 static bool reset = true;
35 
36 static struct usb_driver btusb_driver;
37 
38 #define BTUSB_IGNORE		0x01
39 #define BTUSB_DIGIANSWER	0x02
40 #define BTUSB_CSR		0x04
41 #define BTUSB_SNIFFER		0x08
42 #define BTUSB_BCM92035		0x10
43 #define BTUSB_BROKEN_ISOC	0x20
44 #define BTUSB_WRONG_SCO_MTU	0x40
45 #define BTUSB_ATH3012		0x80
46 #define BTUSB_INTEL		0x100
47 #define BTUSB_INTEL_BOOT	0x200
48 #define BTUSB_BCM_PATCHRAM	0x400
49 #define BTUSB_MARVELL		0x800
50 #define BTUSB_SWAVE		0x1000
51 #define BTUSB_INTEL_NEW		0x2000
52 #define BTUSB_AMP		0x4000
53 #define BTUSB_QCA_ROME		0x8000
54 #define BTUSB_BCM_APPLE		0x10000
55 #define BTUSB_REALTEK		0x20000
56 #define BTUSB_BCM2045		0x40000
57 #define BTUSB_IFNUM_2		0x80000
58 #define BTUSB_CW6622		0x100000
59 #define BTUSB_MEDIATEK		0x200000
60 #define BTUSB_WIDEBAND_SPEECH	0x400000
61 #define BTUSB_VALID_LE_STATES   0x800000
62 
63 static const struct usb_device_id btusb_table[] = {
64 	/* Generic Bluetooth USB device */
65 	{ USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
66 
67 	/* Generic Bluetooth AMP device */
68 	{ USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
69 
70 	/* Generic Bluetooth USB interface */
71 	{ USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },
72 
73 	/* Apple-specific (Broadcom) devices */
74 	{ USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
75 	  .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },
76 
77 	/* MediaTek MT76x0E */
78 	{ USB_DEVICE(0x0e8d, 0x763f) },
79 
80 	/* Broadcom SoftSailing reporting vendor specific */
81 	{ USB_DEVICE(0x0a5c, 0x21e1) },
82 
83 	/* Apple MacBookPro 7,1 */
84 	{ USB_DEVICE(0x05ac, 0x8213) },
85 
86 	/* Apple iMac11,1 */
87 	{ USB_DEVICE(0x05ac, 0x8215) },
88 
89 	/* Apple MacBookPro6,2 */
90 	{ USB_DEVICE(0x05ac, 0x8218) },
91 
92 	/* Apple MacBookAir3,1, MacBookAir3,2 */
93 	{ USB_DEVICE(0x05ac, 0x821b) },
94 
95 	/* Apple MacBookAir4,1 */
96 	{ USB_DEVICE(0x05ac, 0x821f) },
97 
98 	/* Apple MacBookPro8,2 */
99 	{ USB_DEVICE(0x05ac, 0x821a) },
100 
101 	/* Apple MacMini5,1 */
102 	{ USB_DEVICE(0x05ac, 0x8281) },
103 
104 	/* AVM BlueFRITZ! USB v2.0 */
105 	{ USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },
106 
107 	/* Bluetooth Ultraport Module from IBM */
108 	{ USB_DEVICE(0x04bf, 0x030a) },
109 
110 	/* ALPS Modules with non-standard id */
111 	{ USB_DEVICE(0x044e, 0x3001) },
112 	{ USB_DEVICE(0x044e, 0x3002) },
113 
114 	/* Ericsson with non-standard id */
115 	{ USB_DEVICE(0x0bdb, 0x1002) },
116 
117 	/* Canyon CN-BTU1 with HID interfaces */
118 	{ USB_DEVICE(0x0c10, 0x0000) },
119 
120 	/* Broadcom BCM20702A0 */
121 	{ USB_DEVICE(0x413c, 0x8197) },
122 
123 	/* Broadcom BCM20702B0 (Dynex/Insignia) */
124 	{ USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
125 
126 	/* Broadcom BCM43142A0 (Foxconn/Lenovo) */
127 	{ USB_VENDOR_AND_INTERFACE_INFO(0x105b, 0xff, 0x01, 0x01),
128 	  .driver_info = BTUSB_BCM_PATCHRAM },
129 
130 	/* Broadcom BCM920703 (HTC Vive) */
131 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0bb4, 0xff, 0x01, 0x01),
132 	  .driver_info = BTUSB_BCM_PATCHRAM },
133 
134 	/* Foxconn - Hon Hai */
135 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
136 	  .driver_info = BTUSB_BCM_PATCHRAM },
137 
138 	/* Lite-On Technology - Broadcom based */
139 	{ USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
140 	  .driver_info = BTUSB_BCM_PATCHRAM },
141 
142 	/* Broadcom devices with vendor specific id */
143 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
144 	  .driver_info = BTUSB_BCM_PATCHRAM },
145 
146 	/* ASUSTek Computer - Broadcom based */
147 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
148 	  .driver_info = BTUSB_BCM_PATCHRAM },
149 
150 	/* Belkin F8065bf - Broadcom based */
151 	{ USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
152 	  .driver_info = BTUSB_BCM_PATCHRAM },
153 
154 	/* IMC Networks - Broadcom based */
155 	{ USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
156 	  .driver_info = BTUSB_BCM_PATCHRAM },
157 
158 	/* Dell Computer - Broadcom based  */
159 	{ USB_VENDOR_AND_INTERFACE_INFO(0x413c, 0xff, 0x01, 0x01),
160 	  .driver_info = BTUSB_BCM_PATCHRAM },
161 
162 	/* Toshiba Corp - Broadcom based */
163 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
164 	  .driver_info = BTUSB_BCM_PATCHRAM },
165 
166 	/* Intel Bluetooth USB Bootloader (RAM module) */
167 	{ USB_DEVICE(0x8087, 0x0a5a),
168 	  .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
169 
170 	{ }	/* Terminating entry */
171 };
172 
173 MODULE_DEVICE_TABLE(usb, btusb_table);
174 
175 static const struct usb_device_id blacklist_table[] = {
176 	/* CSR BlueCore devices */
177 	{ USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
178 
179 	/* Broadcom BCM2033 without firmware */
180 	{ USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
181 
182 	/* Broadcom BCM2045 devices */
183 	{ USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },
184 
185 	/* Atheros 3011 with sflash firmware */
186 	{ USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
187 	{ USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
188 	{ USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
189 	{ USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
190 	{ USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
191 	{ USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
192 	{ USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
193 
194 	/* Atheros AR9285 Malbec with sflash firmware */
195 	{ USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
196 
197 	/* Atheros 3012 with sflash firmware */
198 	{ USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
199 	{ USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
200 	{ USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
201 	{ USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
202 	{ USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
203 	{ USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
204 	{ USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
205 	{ USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
206 	{ USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
207 	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
208 	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
209 	{ USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
210 	{ USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
211 	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
212 	{ USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
213 	{ USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
214 	{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
215 	{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
216 	{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
217 	{ USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
218 	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
219 	{ USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
220 	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
221 	{ USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
222 	{ USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
223 	{ USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
224 	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
225 	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
226 	{ USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
227 	{ USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
228 	{ USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
229 	{ USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
230 	{ USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
231 	{ USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
232 	{ USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
233 	{ USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
234 	{ USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
235 	{ USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
236 	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
237 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
238 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
239 	{ USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
240 	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
241 	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
242 	{ USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
243 	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
244 	{ USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
245 	{ USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
246 	{ USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
247 	{ USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
248 
249 	/* Atheros AR5BBU12 with sflash firmware */
250 	{ USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
251 
252 	/* Atheros AR5BBU12 with sflash firmware */
253 	{ USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
254 	{ USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
255 
256 	/* QCA ROME chipset */
257 	{ USB_DEVICE(0x0cf3, 0x535b), .driver_info = BTUSB_QCA_ROME },
258 	{ USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME },
259 	{ USB_DEVICE(0x0cf3, 0xe009), .driver_info = BTUSB_QCA_ROME },
260 	{ USB_DEVICE(0x0cf3, 0xe010), .driver_info = BTUSB_QCA_ROME },
261 	{ USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME },
262 	{ USB_DEVICE(0x0cf3, 0xe301), .driver_info = BTUSB_QCA_ROME },
263 	{ USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME },
264 	{ USB_DEVICE(0x0489, 0xe092), .driver_info = BTUSB_QCA_ROME },
265 	{ USB_DEVICE(0x0489, 0xe09f), .driver_info = BTUSB_QCA_ROME },
266 	{ USB_DEVICE(0x0489, 0xe0a2), .driver_info = BTUSB_QCA_ROME },
267 	{ USB_DEVICE(0x04ca, 0x3011), .driver_info = BTUSB_QCA_ROME },
268 	{ USB_DEVICE(0x04ca, 0x3015), .driver_info = BTUSB_QCA_ROME },
269 	{ USB_DEVICE(0x04ca, 0x3016), .driver_info = BTUSB_QCA_ROME },
270 	{ USB_DEVICE(0x04ca, 0x301a), .driver_info = BTUSB_QCA_ROME },
271 	{ USB_DEVICE(0x04ca, 0x3021), .driver_info = BTUSB_QCA_ROME },
272 	{ USB_DEVICE(0x13d3, 0x3491), .driver_info = BTUSB_QCA_ROME },
273 	{ USB_DEVICE(0x13d3, 0x3496), .driver_info = BTUSB_QCA_ROME },
274 	{ USB_DEVICE(0x13d3, 0x3501), .driver_info = BTUSB_QCA_ROME },
275 
276 	/* Broadcom BCM2035 */
277 	{ USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
278 	{ USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
279 	{ USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
280 
281 	/* Broadcom BCM2045 */
282 	{ USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
283 	{ USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
284 
285 	/* IBM/Lenovo ThinkPad with Broadcom chip */
286 	{ USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
287 	{ USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
288 
289 	/* HP laptop with Broadcom chip */
290 	{ USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
291 
292 	/* Dell laptop with Broadcom chip */
293 	{ USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
294 
295 	/* Dell Wireless 370 and 410 devices */
296 	{ USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
297 	{ USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
298 
299 	/* Belkin F8T012 and F8T013 devices */
300 	{ USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
301 	{ USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
302 
303 	/* Asus WL-BTD202 device */
304 	{ USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
305 
306 	/* Kensington Bluetooth USB adapter */
307 	{ USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
308 
309 	/* RTX Telecom based adapters with buggy SCO support */
310 	{ USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
311 	{ USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
312 
313 	/* CONWISE Technology based adapters with buggy SCO support */
314 	{ USB_DEVICE(0x0e5e, 0x6622),
315 	  .driver_info = BTUSB_BROKEN_ISOC | BTUSB_CW6622},
316 
317 	/* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
318 	{ USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
319 
320 	/* Digianswer devices */
321 	{ USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
322 	{ USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
323 
324 	/* CSR BlueCore Bluetooth Sniffer */
325 	{ USB_DEVICE(0x0a12, 0x0002),
326 	  .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
327 
328 	/* Frontline ComProbe Bluetooth Sniffer */
329 	{ USB_DEVICE(0x16d3, 0x0002),
330 	  .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
331 
332 	/* Marvell Bluetooth devices */
333 	{ USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
334 	{ USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
335 	{ USB_DEVICE(0x1286, 0x204e), .driver_info = BTUSB_MARVELL },
336 
337 	/* Intel Bluetooth devices */
338 	{ USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_NEW |
339 						     BTUSB_WIDEBAND_SPEECH |
340 						     BTUSB_VALID_LE_STATES },
341 	{ USB_DEVICE(0x8087, 0x0026), .driver_info = BTUSB_INTEL_NEW |
342 						     BTUSB_WIDEBAND_SPEECH },
343 	{ USB_DEVICE(0x8087, 0x0029), .driver_info = BTUSB_INTEL_NEW |
344 						     BTUSB_WIDEBAND_SPEECH },
345 	{ USB_DEVICE(0x8087, 0x0032), .driver_info = BTUSB_INTEL_NEW |
346 						     BTUSB_WIDEBAND_SPEECH},
347 	{ USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
348 	{ USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
349 	{ USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },
350 	{ USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_NEW |
351 						     BTUSB_WIDEBAND_SPEECH },
352 	{ USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL |
353 						     BTUSB_WIDEBAND_SPEECH },
354 	{ USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_NEW |
355 						     BTUSB_WIDEBAND_SPEECH |
356 						     BTUSB_VALID_LE_STATES },
357 
358 	/* Other Intel Bluetooth devices */
359 	{ USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
360 	  .driver_info = BTUSB_IGNORE },
361 
362 	/* Realtek 8822CE Bluetooth devices */
363 	{ USB_DEVICE(0x0bda, 0xb00c), .driver_info = BTUSB_REALTEK |
364 						     BTUSB_WIDEBAND_SPEECH },
365 
366 	/* Realtek Bluetooth devices */
367 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
368 	  .driver_info = BTUSB_REALTEK },
369 
370 	/* MediaTek Bluetooth devices */
371 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0e8d, 0xe0, 0x01, 0x01),
372 	  .driver_info = BTUSB_MEDIATEK },
373 
374 	/* Additional Realtek 8723AE Bluetooth devices */
375 	{ USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
376 	{ USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
377 
378 	/* Additional Realtek 8723BE Bluetooth devices */
379 	{ USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
380 	{ USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
381 	{ USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
382 	{ USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
383 	{ USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
384 	{ USB_DEVICE(0x13d3, 0x3494), .driver_info = BTUSB_REALTEK },
385 
386 	/* Additional Realtek 8723BU Bluetooth devices */
387 	{ USB_DEVICE(0x7392, 0xa611), .driver_info = BTUSB_REALTEK },
388 
389 	/* Additional Realtek 8723DE Bluetooth devices */
390 	{ USB_DEVICE(0x0bda, 0xb009), .driver_info = BTUSB_REALTEK },
391 	{ USB_DEVICE(0x2ff8, 0xb011), .driver_info = BTUSB_REALTEK },
392 
393 	/* Additional Realtek 8821AE Bluetooth devices */
394 	{ USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
395 	{ USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
396 	{ USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
397 	{ USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
398 	{ USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
399 
400 	/* Additional Realtek 8822BE Bluetooth devices */
401 	{ USB_DEVICE(0x13d3, 0x3526), .driver_info = BTUSB_REALTEK },
402 	{ USB_DEVICE(0x0b05, 0x185c), .driver_info = BTUSB_REALTEK },
403 
404 	/* Additional Realtek 8822CE Bluetooth devices */
405 	{ USB_DEVICE(0x04ca, 0x4005), .driver_info = BTUSB_REALTEK },
406 	{ USB_DEVICE(0x13d3, 0x3548), .driver_info = BTUSB_REALTEK },
407 
408 	/* Silicon Wave based devices */
409 	{ USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
410 
411 	{ }	/* Terminating entry */
412 };
413 
414 /* The Bluetooth USB module build into some devices needs to be reset on resume,
415  * this is a problem with the platform (likely shutting off all power) not with
416  * the module itself. So we use a DMI list to match known broken platforms.
417  */
418 static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
419 	{
420 		/* Dell OptiPlex 3060 (QCA ROME device 0cf3:e007) */
421 		.matches = {
422 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
423 			DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 3060"),
424 		},
425 	},
426 	{
427 		/* Dell XPS 9360 (QCA ROME device 0cf3:e300) */
428 		.matches = {
429 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
430 			DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
431 		},
432 	},
433 	{
434 		/* Dell Inspiron 5565 (QCA ROME device 0cf3:e009) */
435 		.matches = {
436 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
437 			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5565"),
438 		},
439 	},
440 	{}
441 };
442 
443 #define BTUSB_MAX_ISOC_FRAMES	10
444 
445 #define BTUSB_INTR_RUNNING	0
446 #define BTUSB_BULK_RUNNING	1
447 #define BTUSB_ISOC_RUNNING	2
448 #define BTUSB_SUSPENDING	3
449 #define BTUSB_DID_ISO_RESUME	4
450 #define BTUSB_BOOTLOADER	5
451 #define BTUSB_DOWNLOADING	6
452 #define BTUSB_FIRMWARE_LOADED	7
453 #define BTUSB_FIRMWARE_FAILED	8
454 #define BTUSB_BOOTING		9
455 #define BTUSB_DIAG_RUNNING	10
456 #define BTUSB_OOB_WAKE_ENABLED	11
457 #define BTUSB_HW_RESET_ACTIVE	12
458 #define BTUSB_TX_WAIT_VND_EVT	13
459 #define BTUSB_WAKEUP_DISABLE	14
460 #define BTUSB_USE_ALT1_FOR_WBS	15
461 
462 struct btusb_data {
463 	struct hci_dev       *hdev;
464 	struct usb_device    *udev;
465 	struct usb_interface *intf;
466 	struct usb_interface *isoc;
467 	struct usb_interface *diag;
468 	unsigned isoc_ifnum;
469 
470 	unsigned long flags;
471 
472 	struct work_struct work;
473 	struct work_struct waker;
474 
475 	struct usb_anchor deferred;
476 	struct usb_anchor tx_anchor;
477 	int tx_in_flight;
478 	spinlock_t txlock;
479 
480 	struct usb_anchor intr_anchor;
481 	struct usb_anchor bulk_anchor;
482 	struct usb_anchor isoc_anchor;
483 	struct usb_anchor diag_anchor;
484 	struct usb_anchor ctrl_anchor;
485 	spinlock_t rxlock;
486 
487 	struct sk_buff *evt_skb;
488 	struct sk_buff *acl_skb;
489 	struct sk_buff *sco_skb;
490 
491 	struct usb_endpoint_descriptor *intr_ep;
492 	struct usb_endpoint_descriptor *bulk_tx_ep;
493 	struct usb_endpoint_descriptor *bulk_rx_ep;
494 	struct usb_endpoint_descriptor *isoc_tx_ep;
495 	struct usb_endpoint_descriptor *isoc_rx_ep;
496 	struct usb_endpoint_descriptor *diag_tx_ep;
497 	struct usb_endpoint_descriptor *diag_rx_ep;
498 
499 	struct gpio_desc *reset_gpio;
500 
501 	__u8 cmdreq_type;
502 	__u8 cmdreq;
503 
504 	unsigned int sco_num;
505 	unsigned int air_mode;
506 	bool usb_alt6_packet_flow;
507 	int isoc_altsetting;
508 	int suspend_count;
509 
510 	int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
511 	int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
512 
513 	int (*setup_on_usb)(struct hci_dev *hdev);
514 
515 	int oob_wake_irq;   /* irq for out-of-band wake-on-bt */
516 	unsigned cmd_timeout_cnt;
517 };
518 
519 static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
520 {
521 	struct btusb_data *data = hci_get_drvdata(hdev);
522 	struct gpio_desc *reset_gpio = data->reset_gpio;
523 
524 	if (++data->cmd_timeout_cnt < 5)
525 		return;
526 
527 	if (!reset_gpio) {
528 		bt_dev_err(hdev, "No way to reset. Ignoring and continuing");
529 		return;
530 	}
531 
532 	/*
533 	 * Toggle the hard reset line if the platform provides one. The reset
534 	 * is going to yank the device off the USB and then replug. So doing
535 	 * once is enough. The cleanup is handled correctly on the way out
536 	 * (standard USB disconnect), and the new device is detected cleanly
537 	 * and bound to the driver again like it should be.
538 	 */
539 	if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
540 		bt_dev_err(hdev, "last reset failed? Not resetting again");
541 		return;
542 	}
543 
544 	bt_dev_err(hdev, "Initiating HW reset via gpio");
545 	gpiod_set_value_cansleep(reset_gpio, 1);
546 	msleep(100);
547 	gpiod_set_value_cansleep(reset_gpio, 0);
548 }
549 
550 static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
551 {
552 	struct btusb_data *data = hci_get_drvdata(hdev);
553 	struct gpio_desc *reset_gpio = data->reset_gpio;
554 
555 	if (++data->cmd_timeout_cnt < 5)
556 		return;
557 
558 	if (!reset_gpio) {
559 		bt_dev_err(hdev, "No gpio to reset Realtek device, ignoring");
560 		return;
561 	}
562 
563 	/* Toggle the hard reset line. The Realtek device is going to
564 	 * yank itself off the USB and then replug. The cleanup is handled
565 	 * correctly on the way out (standard USB disconnect), and the new
566 	 * device is detected cleanly and bound to the driver again like
567 	 * it should be.
568 	 */
569 	if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
570 		bt_dev_err(hdev, "last reset failed? Not resetting again");
571 		return;
572 	}
573 
574 	bt_dev_err(hdev, "Reset Realtek device via gpio");
575 	gpiod_set_value_cansleep(reset_gpio, 1);
576 	msleep(200);
577 	gpiod_set_value_cansleep(reset_gpio, 0);
578 }
579 
580 static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
581 {
582 	struct btusb_data *data = hci_get_drvdata(hdev);
583 	int err;
584 
585 	if (++data->cmd_timeout_cnt < 5)
586 		return;
587 
588 	bt_dev_err(hdev, "Multiple cmd timeouts seen. Resetting usb device.");
589 	/* This is not an unbalanced PM reference since the device will reset */
590 	err = usb_autopm_get_interface(data->intf);
591 	if (!err)
592 		usb_queue_reset_device(data->intf);
593 	else
594 		bt_dev_err(hdev, "Failed usb_autopm_get_interface with %d", err);
595 }
596 
597 static inline void btusb_free_frags(struct btusb_data *data)
598 {
599 	unsigned long flags;
600 
601 	spin_lock_irqsave(&data->rxlock, flags);
602 
603 	kfree_skb(data->evt_skb);
604 	data->evt_skb = NULL;
605 
606 	kfree_skb(data->acl_skb);
607 	data->acl_skb = NULL;
608 
609 	kfree_skb(data->sco_skb);
610 	data->sco_skb = NULL;
611 
612 	spin_unlock_irqrestore(&data->rxlock, flags);
613 }
614 
615 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
616 {
617 	struct sk_buff *skb;
618 	unsigned long flags;
619 	int err = 0;
620 
621 	spin_lock_irqsave(&data->rxlock, flags);
622 	skb = data->evt_skb;
623 
624 	while (count) {
625 		int len;
626 
627 		if (!skb) {
628 			skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
629 			if (!skb) {
630 				err = -ENOMEM;
631 				break;
632 			}
633 
634 			hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
635 			hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
636 		}
637 
638 		len = min_t(uint, hci_skb_expect(skb), count);
639 		skb_put_data(skb, buffer, len);
640 
641 		count -= len;
642 		buffer += len;
643 		hci_skb_expect(skb) -= len;
644 
645 		if (skb->len == HCI_EVENT_HDR_SIZE) {
646 			/* Complete event header */
647 			hci_skb_expect(skb) = hci_event_hdr(skb)->plen;
648 
649 			if (skb_tailroom(skb) < hci_skb_expect(skb)) {
650 				kfree_skb(skb);
651 				skb = NULL;
652 
653 				err = -EILSEQ;
654 				break;
655 			}
656 		}
657 
658 		if (!hci_skb_expect(skb)) {
659 			/* Complete frame */
660 			data->recv_event(data->hdev, skb);
661 			skb = NULL;
662 		}
663 	}
664 
665 	data->evt_skb = skb;
666 	spin_unlock_irqrestore(&data->rxlock, flags);
667 
668 	return err;
669 }
670 
671 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
672 {
673 	struct sk_buff *skb;
674 	unsigned long flags;
675 	int err = 0;
676 
677 	spin_lock_irqsave(&data->rxlock, flags);
678 	skb = data->acl_skb;
679 
680 	while (count) {
681 		int len;
682 
683 		if (!skb) {
684 			skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
685 			if (!skb) {
686 				err = -ENOMEM;
687 				break;
688 			}
689 
690 			hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
691 			hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
692 		}
693 
694 		len = min_t(uint, hci_skb_expect(skb), count);
695 		skb_put_data(skb, buffer, len);
696 
697 		count -= len;
698 		buffer += len;
699 		hci_skb_expect(skb) -= len;
700 
701 		if (skb->len == HCI_ACL_HDR_SIZE) {
702 			__le16 dlen = hci_acl_hdr(skb)->dlen;
703 
704 			/* Complete ACL header */
705 			hci_skb_expect(skb) = __le16_to_cpu(dlen);
706 
707 			if (skb_tailroom(skb) < hci_skb_expect(skb)) {
708 				kfree_skb(skb);
709 				skb = NULL;
710 
711 				err = -EILSEQ;
712 				break;
713 			}
714 		}
715 
716 		if (!hci_skb_expect(skb)) {
717 			/* Complete frame */
718 			hci_recv_frame(data->hdev, skb);
719 			skb = NULL;
720 		}
721 	}
722 
723 	data->acl_skb = skb;
724 	spin_unlock_irqrestore(&data->rxlock, flags);
725 
726 	return err;
727 }
728 
729 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
730 {
731 	struct sk_buff *skb;
732 	unsigned long flags;
733 	int err = 0;
734 
735 	spin_lock_irqsave(&data->rxlock, flags);
736 	skb = data->sco_skb;
737 
738 	while (count) {
739 		int len;
740 
741 		if (!skb) {
742 			skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
743 			if (!skb) {
744 				err = -ENOMEM;
745 				break;
746 			}
747 
748 			hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
749 			hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
750 		}
751 
752 		len = min_t(uint, hci_skb_expect(skb), count);
753 		skb_put_data(skb, buffer, len);
754 
755 		count -= len;
756 		buffer += len;
757 		hci_skb_expect(skb) -= len;
758 
759 		if (skb->len == HCI_SCO_HDR_SIZE) {
760 			/* Complete SCO header */
761 			hci_skb_expect(skb) = hci_sco_hdr(skb)->dlen;
762 
763 			if (skb_tailroom(skb) < hci_skb_expect(skb)) {
764 				kfree_skb(skb);
765 				skb = NULL;
766 
767 				err = -EILSEQ;
768 				break;
769 			}
770 		}
771 
772 		if (!hci_skb_expect(skb)) {
773 			/* Complete frame */
774 			hci_recv_frame(data->hdev, skb);
775 			skb = NULL;
776 		}
777 	}
778 
779 	data->sco_skb = skb;
780 	spin_unlock_irqrestore(&data->rxlock, flags);
781 
782 	return err;
783 }
784 
785 static void btusb_intr_complete(struct urb *urb)
786 {
787 	struct hci_dev *hdev = urb->context;
788 	struct btusb_data *data = hci_get_drvdata(hdev);
789 	int err;
790 
791 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
792 	       urb->actual_length);
793 
794 	if (!test_bit(HCI_RUNNING, &hdev->flags))
795 		return;
796 
797 	if (urb->status == 0) {
798 		hdev->stat.byte_rx += urb->actual_length;
799 
800 		if (btusb_recv_intr(data, urb->transfer_buffer,
801 				    urb->actual_length) < 0) {
802 			bt_dev_err(hdev, "corrupted event packet");
803 			hdev->stat.err_rx++;
804 		}
805 	} else if (urb->status == -ENOENT) {
806 		/* Avoid suspend failed when usb_kill_urb */
807 		return;
808 	}
809 
810 	if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
811 		return;
812 
813 	usb_mark_last_busy(data->udev);
814 	usb_anchor_urb(urb, &data->intr_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 		 */
821 		if (err != -EPERM && err != -ENODEV)
822 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
823 				   urb, -err);
824 		usb_unanchor_urb(urb);
825 	}
826 }
827 
828 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
829 {
830 	struct btusb_data *data = hci_get_drvdata(hdev);
831 	struct urb *urb;
832 	unsigned char *buf;
833 	unsigned int pipe;
834 	int err, size;
835 
836 	BT_DBG("%s", hdev->name);
837 
838 	if (!data->intr_ep)
839 		return -ENODEV;
840 
841 	urb = usb_alloc_urb(0, mem_flags);
842 	if (!urb)
843 		return -ENOMEM;
844 
845 	size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
846 
847 	buf = kmalloc(size, mem_flags);
848 	if (!buf) {
849 		usb_free_urb(urb);
850 		return -ENOMEM;
851 	}
852 
853 	pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
854 
855 	usb_fill_int_urb(urb, data->udev, pipe, buf, size,
856 			 btusb_intr_complete, hdev, data->intr_ep->bInterval);
857 
858 	urb->transfer_flags |= URB_FREE_BUFFER;
859 
860 	usb_anchor_urb(urb, &data->intr_anchor);
861 
862 	err = usb_submit_urb(urb, mem_flags);
863 	if (err < 0) {
864 		if (err != -EPERM && err != -ENODEV)
865 			bt_dev_err(hdev, "urb %p submission failed (%d)",
866 				   urb, -err);
867 		usb_unanchor_urb(urb);
868 	}
869 
870 	usb_free_urb(urb);
871 
872 	return err;
873 }
874 
875 static void btusb_bulk_complete(struct urb *urb)
876 {
877 	struct hci_dev *hdev = urb->context;
878 	struct btusb_data *data = hci_get_drvdata(hdev);
879 	int err;
880 
881 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
882 	       urb->actual_length);
883 
884 	if (!test_bit(HCI_RUNNING, &hdev->flags))
885 		return;
886 
887 	if (urb->status == 0) {
888 		hdev->stat.byte_rx += urb->actual_length;
889 
890 		if (data->recv_bulk(data, urb->transfer_buffer,
891 				    urb->actual_length) < 0) {
892 			bt_dev_err(hdev, "corrupted ACL packet");
893 			hdev->stat.err_rx++;
894 		}
895 	} else if (urb->status == -ENOENT) {
896 		/* Avoid suspend failed when usb_kill_urb */
897 		return;
898 	}
899 
900 	if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
901 		return;
902 
903 	usb_anchor_urb(urb, &data->bulk_anchor);
904 	usb_mark_last_busy(data->udev);
905 
906 	err = usb_submit_urb(urb, GFP_ATOMIC);
907 	if (err < 0) {
908 		/* -EPERM: urb is being killed;
909 		 * -ENODEV: device got disconnected
910 		 */
911 		if (err != -EPERM && err != -ENODEV)
912 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
913 				   urb, -err);
914 		usb_unanchor_urb(urb);
915 	}
916 }
917 
918 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
919 {
920 	struct btusb_data *data = hci_get_drvdata(hdev);
921 	struct urb *urb;
922 	unsigned char *buf;
923 	unsigned int pipe;
924 	int err, size = HCI_MAX_FRAME_SIZE;
925 
926 	BT_DBG("%s", hdev->name);
927 
928 	if (!data->bulk_rx_ep)
929 		return -ENODEV;
930 
931 	urb = usb_alloc_urb(0, mem_flags);
932 	if (!urb)
933 		return -ENOMEM;
934 
935 	buf = kmalloc(size, mem_flags);
936 	if (!buf) {
937 		usb_free_urb(urb);
938 		return -ENOMEM;
939 	}
940 
941 	pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
942 
943 	usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
944 			  btusb_bulk_complete, hdev);
945 
946 	urb->transfer_flags |= URB_FREE_BUFFER;
947 
948 	usb_mark_last_busy(data->udev);
949 	usb_anchor_urb(urb, &data->bulk_anchor);
950 
951 	err = usb_submit_urb(urb, mem_flags);
952 	if (err < 0) {
953 		if (err != -EPERM && err != -ENODEV)
954 			bt_dev_err(hdev, "urb %p submission failed (%d)",
955 				   urb, -err);
956 		usb_unanchor_urb(urb);
957 	}
958 
959 	usb_free_urb(urb);
960 
961 	return err;
962 }
963 
964 static void btusb_isoc_complete(struct urb *urb)
965 {
966 	struct hci_dev *hdev = urb->context;
967 	struct btusb_data *data = hci_get_drvdata(hdev);
968 	int i, err;
969 
970 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
971 	       urb->actual_length);
972 
973 	if (!test_bit(HCI_RUNNING, &hdev->flags))
974 		return;
975 
976 	if (urb->status == 0) {
977 		for (i = 0; i < urb->number_of_packets; i++) {
978 			unsigned int offset = urb->iso_frame_desc[i].offset;
979 			unsigned int length = urb->iso_frame_desc[i].actual_length;
980 
981 			if (urb->iso_frame_desc[i].status)
982 				continue;
983 
984 			hdev->stat.byte_rx += length;
985 
986 			if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
987 					    length) < 0) {
988 				bt_dev_err(hdev, "corrupted SCO packet");
989 				hdev->stat.err_rx++;
990 			}
991 		}
992 	} else if (urb->status == -ENOENT) {
993 		/* Avoid suspend failed when usb_kill_urb */
994 		return;
995 	}
996 
997 	if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
998 		return;
999 
1000 	usb_anchor_urb(urb, &data->isoc_anchor);
1001 
1002 	err = usb_submit_urb(urb, GFP_ATOMIC);
1003 	if (err < 0) {
1004 		/* -EPERM: urb is being killed;
1005 		 * -ENODEV: device got disconnected
1006 		 */
1007 		if (err != -EPERM && err != -ENODEV)
1008 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1009 				   urb, -err);
1010 		usb_unanchor_urb(urb);
1011 	}
1012 }
1013 
1014 static inline void __fill_isoc_descriptor_msbc(struct urb *urb, int len,
1015 					       int mtu, struct btusb_data *data)
1016 {
1017 	int i, offset = 0;
1018 	unsigned int interval;
1019 
1020 	BT_DBG("len %d mtu %d", len, mtu);
1021 
1022 	/* For mSBC ALT 6 setting the host will send the packet at continuous
1023 	 * flow. As per core spec 5, vol 4, part B, table 2.1. For ALT setting
1024 	 * 6 the HCI PACKET INTERVAL should be 7.5ms for every usb packets.
1025 	 * To maintain the rate we send 63bytes of usb packets alternatively for
1026 	 * 7ms and 8ms to maintain the rate as 7.5ms.
1027 	 */
1028 	if (data->usb_alt6_packet_flow) {
1029 		interval = 7;
1030 		data->usb_alt6_packet_flow = false;
1031 	} else {
1032 		interval = 6;
1033 		data->usb_alt6_packet_flow = true;
1034 	}
1035 
1036 	for (i = 0; i < interval; i++) {
1037 		urb->iso_frame_desc[i].offset = offset;
1038 		urb->iso_frame_desc[i].length = offset;
1039 	}
1040 
1041 	if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1042 		urb->iso_frame_desc[i].offset = offset;
1043 		urb->iso_frame_desc[i].length = len;
1044 		i++;
1045 	}
1046 
1047 	urb->number_of_packets = i;
1048 }
1049 
1050 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
1051 {
1052 	int i, offset = 0;
1053 
1054 	BT_DBG("len %d mtu %d", len, mtu);
1055 
1056 	for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
1057 					i++, offset += mtu, len -= mtu) {
1058 		urb->iso_frame_desc[i].offset = offset;
1059 		urb->iso_frame_desc[i].length = mtu;
1060 	}
1061 
1062 	if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1063 		urb->iso_frame_desc[i].offset = offset;
1064 		urb->iso_frame_desc[i].length = len;
1065 		i++;
1066 	}
1067 
1068 	urb->number_of_packets = i;
1069 }
1070 
1071 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
1072 {
1073 	struct btusb_data *data = hci_get_drvdata(hdev);
1074 	struct urb *urb;
1075 	unsigned char *buf;
1076 	unsigned int pipe;
1077 	int err, size;
1078 
1079 	BT_DBG("%s", hdev->name);
1080 
1081 	if (!data->isoc_rx_ep)
1082 		return -ENODEV;
1083 
1084 	urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
1085 	if (!urb)
1086 		return -ENOMEM;
1087 
1088 	size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
1089 						BTUSB_MAX_ISOC_FRAMES;
1090 
1091 	buf = kmalloc(size, mem_flags);
1092 	if (!buf) {
1093 		usb_free_urb(urb);
1094 		return -ENOMEM;
1095 	}
1096 
1097 	pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
1098 
1099 	usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
1100 			 hdev, data->isoc_rx_ep->bInterval);
1101 
1102 	urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
1103 
1104 	__fill_isoc_descriptor(urb, size,
1105 			       le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
1106 
1107 	usb_anchor_urb(urb, &data->isoc_anchor);
1108 
1109 	err = usb_submit_urb(urb, mem_flags);
1110 	if (err < 0) {
1111 		if (err != -EPERM && err != -ENODEV)
1112 			bt_dev_err(hdev, "urb %p submission failed (%d)",
1113 				   urb, -err);
1114 		usb_unanchor_urb(urb);
1115 	}
1116 
1117 	usb_free_urb(urb);
1118 
1119 	return err;
1120 }
1121 
1122 static void btusb_diag_complete(struct urb *urb)
1123 {
1124 	struct hci_dev *hdev = urb->context;
1125 	struct btusb_data *data = hci_get_drvdata(hdev);
1126 	int err;
1127 
1128 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1129 	       urb->actual_length);
1130 
1131 	if (urb->status == 0) {
1132 		struct sk_buff *skb;
1133 
1134 		skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
1135 		if (skb) {
1136 			skb_put_data(skb, urb->transfer_buffer,
1137 				     urb->actual_length);
1138 			hci_recv_diag(hdev, skb);
1139 		}
1140 	} else if (urb->status == -ENOENT) {
1141 		/* Avoid suspend failed when usb_kill_urb */
1142 		return;
1143 	}
1144 
1145 	if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
1146 		return;
1147 
1148 	usb_anchor_urb(urb, &data->diag_anchor);
1149 	usb_mark_last_busy(data->udev);
1150 
1151 	err = usb_submit_urb(urb, GFP_ATOMIC);
1152 	if (err < 0) {
1153 		/* -EPERM: urb is being killed;
1154 		 * -ENODEV: device got disconnected
1155 		 */
1156 		if (err != -EPERM && err != -ENODEV)
1157 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1158 				   urb, -err);
1159 		usb_unanchor_urb(urb);
1160 	}
1161 }
1162 
1163 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
1164 {
1165 	struct btusb_data *data = hci_get_drvdata(hdev);
1166 	struct urb *urb;
1167 	unsigned char *buf;
1168 	unsigned int pipe;
1169 	int err, size = HCI_MAX_FRAME_SIZE;
1170 
1171 	BT_DBG("%s", hdev->name);
1172 
1173 	if (!data->diag_rx_ep)
1174 		return -ENODEV;
1175 
1176 	urb = usb_alloc_urb(0, mem_flags);
1177 	if (!urb)
1178 		return -ENOMEM;
1179 
1180 	buf = kmalloc(size, mem_flags);
1181 	if (!buf) {
1182 		usb_free_urb(urb);
1183 		return -ENOMEM;
1184 	}
1185 
1186 	pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
1187 
1188 	usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1189 			  btusb_diag_complete, hdev);
1190 
1191 	urb->transfer_flags |= URB_FREE_BUFFER;
1192 
1193 	usb_mark_last_busy(data->udev);
1194 	usb_anchor_urb(urb, &data->diag_anchor);
1195 
1196 	err = usb_submit_urb(urb, mem_flags);
1197 	if (err < 0) {
1198 		if (err != -EPERM && err != -ENODEV)
1199 			bt_dev_err(hdev, "urb %p submission failed (%d)",
1200 				   urb, -err);
1201 		usb_unanchor_urb(urb);
1202 	}
1203 
1204 	usb_free_urb(urb);
1205 
1206 	return err;
1207 }
1208 
1209 static void btusb_tx_complete(struct urb *urb)
1210 {
1211 	struct sk_buff *skb = urb->context;
1212 	struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1213 	struct btusb_data *data = hci_get_drvdata(hdev);
1214 	unsigned long flags;
1215 
1216 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1217 	       urb->actual_length);
1218 
1219 	if (!test_bit(HCI_RUNNING, &hdev->flags))
1220 		goto done;
1221 
1222 	if (!urb->status)
1223 		hdev->stat.byte_tx += urb->transfer_buffer_length;
1224 	else
1225 		hdev->stat.err_tx++;
1226 
1227 done:
1228 	spin_lock_irqsave(&data->txlock, flags);
1229 	data->tx_in_flight--;
1230 	spin_unlock_irqrestore(&data->txlock, flags);
1231 
1232 	kfree(urb->setup_packet);
1233 
1234 	kfree_skb(skb);
1235 }
1236 
1237 static void btusb_isoc_tx_complete(struct urb *urb)
1238 {
1239 	struct sk_buff *skb = urb->context;
1240 	struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1241 
1242 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1243 	       urb->actual_length);
1244 
1245 	if (!test_bit(HCI_RUNNING, &hdev->flags))
1246 		goto done;
1247 
1248 	if (!urb->status)
1249 		hdev->stat.byte_tx += urb->transfer_buffer_length;
1250 	else
1251 		hdev->stat.err_tx++;
1252 
1253 done:
1254 	kfree(urb->setup_packet);
1255 
1256 	kfree_skb(skb);
1257 }
1258 
1259 static int btusb_open(struct hci_dev *hdev)
1260 {
1261 	struct btusb_data *data = hci_get_drvdata(hdev);
1262 	int err;
1263 
1264 	BT_DBG("%s", hdev->name);
1265 
1266 	err = usb_autopm_get_interface(data->intf);
1267 	if (err < 0)
1268 		return err;
1269 
1270 	/* Patching USB firmware files prior to starting any URBs of HCI path
1271 	 * It is more safe to use USB bulk channel for downloading USB patch
1272 	 */
1273 	if (data->setup_on_usb) {
1274 		err = data->setup_on_usb(hdev);
1275 		if (err < 0)
1276 			goto setup_fail;
1277 	}
1278 
1279 	data->intf->needs_remote_wakeup = 1;
1280 
1281 	/* Disable device remote wakeup when host is suspended
1282 	 * For Realtek chips, global suspend without
1283 	 * SET_FEATURE (DEVICE_REMOTE_WAKEUP) can save more power in device.
1284 	 */
1285 	if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
1286 		device_wakeup_disable(&data->udev->dev);
1287 
1288 	if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1289 		goto done;
1290 
1291 	err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1292 	if (err < 0)
1293 		goto failed;
1294 
1295 	err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1296 	if (err < 0) {
1297 		usb_kill_anchored_urbs(&data->intr_anchor);
1298 		goto failed;
1299 	}
1300 
1301 	set_bit(BTUSB_BULK_RUNNING, &data->flags);
1302 	btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1303 
1304 	if (data->diag) {
1305 		if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1306 			set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1307 	}
1308 
1309 done:
1310 	usb_autopm_put_interface(data->intf);
1311 	return 0;
1312 
1313 failed:
1314 	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1315 setup_fail:
1316 	usb_autopm_put_interface(data->intf);
1317 	return err;
1318 }
1319 
1320 static void btusb_stop_traffic(struct btusb_data *data)
1321 {
1322 	usb_kill_anchored_urbs(&data->intr_anchor);
1323 	usb_kill_anchored_urbs(&data->bulk_anchor);
1324 	usb_kill_anchored_urbs(&data->isoc_anchor);
1325 	usb_kill_anchored_urbs(&data->diag_anchor);
1326 	usb_kill_anchored_urbs(&data->ctrl_anchor);
1327 }
1328 
1329 static int btusb_close(struct hci_dev *hdev)
1330 {
1331 	struct btusb_data *data = hci_get_drvdata(hdev);
1332 	int err;
1333 
1334 	BT_DBG("%s", hdev->name);
1335 
1336 	cancel_work_sync(&data->work);
1337 	cancel_work_sync(&data->waker);
1338 
1339 	clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1340 	clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1341 	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1342 	clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1343 
1344 	btusb_stop_traffic(data);
1345 	btusb_free_frags(data);
1346 
1347 	err = usb_autopm_get_interface(data->intf);
1348 	if (err < 0)
1349 		goto failed;
1350 
1351 	data->intf->needs_remote_wakeup = 0;
1352 
1353 	/* Enable remote wake up for auto-suspend */
1354 	if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
1355 		data->intf->needs_remote_wakeup = 1;
1356 
1357 	usb_autopm_put_interface(data->intf);
1358 
1359 failed:
1360 	usb_scuttle_anchored_urbs(&data->deferred);
1361 	return 0;
1362 }
1363 
1364 static int btusb_flush(struct hci_dev *hdev)
1365 {
1366 	struct btusb_data *data = hci_get_drvdata(hdev);
1367 
1368 	BT_DBG("%s", hdev->name);
1369 
1370 	usb_kill_anchored_urbs(&data->tx_anchor);
1371 	btusb_free_frags(data);
1372 
1373 	return 0;
1374 }
1375 
1376 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1377 {
1378 	struct btusb_data *data = hci_get_drvdata(hdev);
1379 	struct usb_ctrlrequest *dr;
1380 	struct urb *urb;
1381 	unsigned int pipe;
1382 
1383 	urb = usb_alloc_urb(0, GFP_KERNEL);
1384 	if (!urb)
1385 		return ERR_PTR(-ENOMEM);
1386 
1387 	dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1388 	if (!dr) {
1389 		usb_free_urb(urb);
1390 		return ERR_PTR(-ENOMEM);
1391 	}
1392 
1393 	dr->bRequestType = data->cmdreq_type;
1394 	dr->bRequest     = data->cmdreq;
1395 	dr->wIndex       = 0;
1396 	dr->wValue       = 0;
1397 	dr->wLength      = __cpu_to_le16(skb->len);
1398 
1399 	pipe = usb_sndctrlpipe(data->udev, 0x00);
1400 
1401 	usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1402 			     skb->data, skb->len, btusb_tx_complete, skb);
1403 
1404 	skb->dev = (void *)hdev;
1405 
1406 	return urb;
1407 }
1408 
1409 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1410 {
1411 	struct btusb_data *data = hci_get_drvdata(hdev);
1412 	struct urb *urb;
1413 	unsigned int pipe;
1414 
1415 	if (!data->bulk_tx_ep)
1416 		return ERR_PTR(-ENODEV);
1417 
1418 	urb = usb_alloc_urb(0, GFP_KERNEL);
1419 	if (!urb)
1420 		return ERR_PTR(-ENOMEM);
1421 
1422 	pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1423 
1424 	usb_fill_bulk_urb(urb, data->udev, pipe,
1425 			  skb->data, skb->len, btusb_tx_complete, skb);
1426 
1427 	skb->dev = (void *)hdev;
1428 
1429 	return urb;
1430 }
1431 
1432 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1433 {
1434 	struct btusb_data *data = hci_get_drvdata(hdev);
1435 	struct urb *urb;
1436 	unsigned int pipe;
1437 
1438 	if (!data->isoc_tx_ep)
1439 		return ERR_PTR(-ENODEV);
1440 
1441 	urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1442 	if (!urb)
1443 		return ERR_PTR(-ENOMEM);
1444 
1445 	pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1446 
1447 	usb_fill_int_urb(urb, data->udev, pipe,
1448 			 skb->data, skb->len, btusb_isoc_tx_complete,
1449 			 skb, data->isoc_tx_ep->bInterval);
1450 
1451 	urb->transfer_flags  = URB_ISO_ASAP;
1452 
1453 	if (data->isoc_altsetting == 6)
1454 		__fill_isoc_descriptor_msbc(urb, skb->len,
1455 					    le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize),
1456 					    data);
1457 	else
1458 		__fill_isoc_descriptor(urb, skb->len,
1459 				       le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1460 	skb->dev = (void *)hdev;
1461 
1462 	return urb;
1463 }
1464 
1465 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1466 {
1467 	struct btusb_data *data = hci_get_drvdata(hdev);
1468 	int err;
1469 
1470 	usb_anchor_urb(urb, &data->tx_anchor);
1471 
1472 	err = usb_submit_urb(urb, GFP_KERNEL);
1473 	if (err < 0) {
1474 		if (err != -EPERM && err != -ENODEV)
1475 			bt_dev_err(hdev, "urb %p submission failed (%d)",
1476 				   urb, -err);
1477 		kfree(urb->setup_packet);
1478 		usb_unanchor_urb(urb);
1479 	} else {
1480 		usb_mark_last_busy(data->udev);
1481 	}
1482 
1483 	usb_free_urb(urb);
1484 	return err;
1485 }
1486 
1487 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1488 {
1489 	struct btusb_data *data = hci_get_drvdata(hdev);
1490 	unsigned long flags;
1491 	bool suspending;
1492 
1493 	spin_lock_irqsave(&data->txlock, flags);
1494 	suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1495 	if (!suspending)
1496 		data->tx_in_flight++;
1497 	spin_unlock_irqrestore(&data->txlock, flags);
1498 
1499 	if (!suspending)
1500 		return submit_tx_urb(hdev, urb);
1501 
1502 	usb_anchor_urb(urb, &data->deferred);
1503 	schedule_work(&data->waker);
1504 
1505 	usb_free_urb(urb);
1506 	return 0;
1507 }
1508 
1509 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1510 {
1511 	struct urb *urb;
1512 
1513 	BT_DBG("%s", hdev->name);
1514 
1515 	switch (hci_skb_pkt_type(skb)) {
1516 	case HCI_COMMAND_PKT:
1517 		urb = alloc_ctrl_urb(hdev, skb);
1518 		if (IS_ERR(urb))
1519 			return PTR_ERR(urb);
1520 
1521 		hdev->stat.cmd_tx++;
1522 		return submit_or_queue_tx_urb(hdev, urb);
1523 
1524 	case HCI_ACLDATA_PKT:
1525 		urb = alloc_bulk_urb(hdev, skb);
1526 		if (IS_ERR(urb))
1527 			return PTR_ERR(urb);
1528 
1529 		hdev->stat.acl_tx++;
1530 		return submit_or_queue_tx_urb(hdev, urb);
1531 
1532 	case HCI_SCODATA_PKT:
1533 		if (hci_conn_num(hdev, SCO_LINK) < 1)
1534 			return -ENODEV;
1535 
1536 		urb = alloc_isoc_urb(hdev, skb);
1537 		if (IS_ERR(urb))
1538 			return PTR_ERR(urb);
1539 
1540 		hdev->stat.sco_tx++;
1541 		return submit_tx_urb(hdev, urb);
1542 	}
1543 
1544 	return -EILSEQ;
1545 }
1546 
1547 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1548 {
1549 	struct btusb_data *data = hci_get_drvdata(hdev);
1550 
1551 	BT_DBG("%s evt %d", hdev->name, evt);
1552 
1553 	if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1554 		data->sco_num = hci_conn_num(hdev, SCO_LINK);
1555 		data->air_mode = evt;
1556 		schedule_work(&data->work);
1557 	}
1558 }
1559 
1560 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1561 {
1562 	struct btusb_data *data = hci_get_drvdata(hdev);
1563 	struct usb_interface *intf = data->isoc;
1564 	struct usb_endpoint_descriptor *ep_desc;
1565 	int i, err;
1566 
1567 	if (!data->isoc)
1568 		return -ENODEV;
1569 
1570 	err = usb_set_interface(data->udev, data->isoc_ifnum, altsetting);
1571 	if (err < 0) {
1572 		bt_dev_err(hdev, "setting interface failed (%d)", -err);
1573 		return err;
1574 	}
1575 
1576 	data->isoc_altsetting = altsetting;
1577 
1578 	data->isoc_tx_ep = NULL;
1579 	data->isoc_rx_ep = NULL;
1580 
1581 	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1582 		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1583 
1584 		if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1585 			data->isoc_tx_ep = ep_desc;
1586 			continue;
1587 		}
1588 
1589 		if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1590 			data->isoc_rx_ep = ep_desc;
1591 			continue;
1592 		}
1593 	}
1594 
1595 	if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1596 		bt_dev_err(hdev, "invalid SCO descriptors");
1597 		return -ENODEV;
1598 	}
1599 
1600 	return 0;
1601 }
1602 
1603 static int btusb_switch_alt_setting(struct hci_dev *hdev, int new_alts)
1604 {
1605 	struct btusb_data *data = hci_get_drvdata(hdev);
1606 	int err;
1607 
1608 	if (data->isoc_altsetting != new_alts) {
1609 		unsigned long flags;
1610 
1611 		clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1612 		usb_kill_anchored_urbs(&data->isoc_anchor);
1613 
1614 		/* When isochronous alternate setting needs to be
1615 		 * changed, because SCO connection has been added
1616 		 * or removed, a packet fragment may be left in the
1617 		 * reassembling state. This could lead to wrongly
1618 		 * assembled fragments.
1619 		 *
1620 		 * Clear outstanding fragment when selecting a new
1621 		 * alternate setting.
1622 		 */
1623 		spin_lock_irqsave(&data->rxlock, flags);
1624 		kfree_skb(data->sco_skb);
1625 		data->sco_skb = NULL;
1626 		spin_unlock_irqrestore(&data->rxlock, flags);
1627 
1628 		err = __set_isoc_interface(hdev, new_alts);
1629 		if (err < 0)
1630 			return err;
1631 	}
1632 
1633 	if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1634 		if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1635 			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1636 		else
1637 			btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1638 	}
1639 
1640 	return 0;
1641 }
1642 
1643 static struct usb_host_interface *btusb_find_altsetting(struct btusb_data *data,
1644 							int alt)
1645 {
1646 	struct usb_interface *intf = data->isoc;
1647 	int i;
1648 
1649 	BT_DBG("Looking for Alt no :%d", alt);
1650 
1651 	if (!intf)
1652 		return NULL;
1653 
1654 	for (i = 0; i < intf->num_altsetting; i++) {
1655 		if (intf->altsetting[i].desc.bAlternateSetting == alt)
1656 			return &intf->altsetting[i];
1657 	}
1658 
1659 	return NULL;
1660 }
1661 
1662 static void btusb_work(struct work_struct *work)
1663 {
1664 	struct btusb_data *data = container_of(work, struct btusb_data, work);
1665 	struct hci_dev *hdev = data->hdev;
1666 	int new_alts = 0;
1667 	int err;
1668 
1669 	if (data->sco_num > 0) {
1670 		if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1671 			err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1672 			if (err < 0) {
1673 				clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1674 				usb_kill_anchored_urbs(&data->isoc_anchor);
1675 				return;
1676 			}
1677 
1678 			set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1679 		}
1680 
1681 		if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_CVSD) {
1682 			if (hdev->voice_setting & 0x0020) {
1683 				static const int alts[3] = { 2, 4, 5 };
1684 
1685 				new_alts = alts[data->sco_num - 1];
1686 			} else {
1687 				new_alts = data->sco_num;
1688 			}
1689 		} else if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_TRANSP) {
1690 			/* Check if Alt 6 is supported for Transparent audio */
1691 			if (btusb_find_altsetting(data, 6)) {
1692 				data->usb_alt6_packet_flow = true;
1693 				new_alts = 6;
1694 			} else if (test_bit(BTUSB_USE_ALT1_FOR_WBS, &data->flags)) {
1695 				new_alts = 1;
1696 			} else {
1697 				bt_dev_err(hdev, "Device does not support ALT setting 6");
1698 			}
1699 		}
1700 
1701 		if (btusb_switch_alt_setting(hdev, new_alts) < 0)
1702 			bt_dev_err(hdev, "set USB alt:(%d) failed!", new_alts);
1703 	} else {
1704 		clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1705 		usb_kill_anchored_urbs(&data->isoc_anchor);
1706 
1707 		__set_isoc_interface(hdev, 0);
1708 		if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1709 			usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1710 	}
1711 }
1712 
1713 static void btusb_waker(struct work_struct *work)
1714 {
1715 	struct btusb_data *data = container_of(work, struct btusb_data, waker);
1716 	int err;
1717 
1718 	err = usb_autopm_get_interface(data->intf);
1719 	if (err < 0)
1720 		return;
1721 
1722 	usb_autopm_put_interface(data->intf);
1723 }
1724 
1725 static int btusb_setup_bcm92035(struct hci_dev *hdev)
1726 {
1727 	struct sk_buff *skb;
1728 	u8 val = 0x00;
1729 
1730 	BT_DBG("%s", hdev->name);
1731 
1732 	skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
1733 	if (IS_ERR(skb))
1734 		bt_dev_err(hdev, "BCM92035 command failed (%ld)", PTR_ERR(skb));
1735 	else
1736 		kfree_skb(skb);
1737 
1738 	return 0;
1739 }
1740 
1741 static int btusb_setup_csr(struct hci_dev *hdev)
1742 {
1743 	struct hci_rp_read_local_version *rp;
1744 	struct sk_buff *skb;
1745 	bool is_fake = false;
1746 
1747 	BT_DBG("%s", hdev->name);
1748 
1749 	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
1750 			     HCI_INIT_TIMEOUT);
1751 	if (IS_ERR(skb)) {
1752 		int err = PTR_ERR(skb);
1753 		bt_dev_err(hdev, "CSR: Local version failed (%d)", err);
1754 		return err;
1755 	}
1756 
1757 	if (skb->len != sizeof(struct hci_rp_read_local_version)) {
1758 		bt_dev_err(hdev, "CSR: Local version length mismatch");
1759 		kfree_skb(skb);
1760 		return -EIO;
1761 	}
1762 
1763 	rp = (struct hci_rp_read_local_version *)skb->data;
1764 
1765 	/* Detect a wide host of Chinese controllers that aren't CSR.
1766 	 *
1767 	 * Known fake bcdDevices: 0x0100, 0x0134, 0x1915, 0x2520, 0x7558, 0x8891
1768 	 *
1769 	 * The main thing they have in common is that these are really popular low-cost
1770 	 * options that support newer Bluetooth versions but rely on heavy VID/PID
1771 	 * squatting of this poor old Bluetooth 1.1 device. Even sold as such.
1772 	 *
1773 	 * We detect actual CSR devices by checking that the HCI manufacturer code
1774 	 * is Cambridge Silicon Radio (10) and ensuring that LMP sub-version and
1775 	 * HCI rev values always match. As they both store the firmware number.
1776 	 */
1777 	if (le16_to_cpu(rp->manufacturer) != 10 ||
1778 	    le16_to_cpu(rp->hci_rev) != le16_to_cpu(rp->lmp_subver))
1779 		is_fake = true;
1780 
1781 	/* Known legit CSR firmware build numbers and their supported BT versions:
1782 	 * - 1.1 (0x1) -> 0x0073, 0x020d, 0x033c, 0x034e
1783 	 * - 1.2 (0x2) ->                 0x04d9, 0x0529
1784 	 * - 2.0 (0x3) ->         0x07a6, 0x07ad, 0x0c5c
1785 	 * - 2.1 (0x4) ->         0x149c, 0x1735, 0x1899 (0x1899 is a BlueCore4-External)
1786 	 * - 4.0 (0x6) ->         0x1d86, 0x2031, 0x22bb
1787 	 *
1788 	 * e.g. Real CSR dongles with LMP subversion 0x73 are old enough that
1789 	 *      support BT 1.1 only; so it's a dead giveaway when some
1790 	 *      third-party BT 4.0 dongle reuses it.
1791 	 */
1792 	else if (le16_to_cpu(rp->lmp_subver) <= 0x034e &&
1793 		 le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_1)
1794 		is_fake = true;
1795 
1796 	else if (le16_to_cpu(rp->lmp_subver) <= 0x0529 &&
1797 		 le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_2)
1798 		is_fake = true;
1799 
1800 	else if (le16_to_cpu(rp->lmp_subver) <= 0x0c5c &&
1801 		 le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_0)
1802 		is_fake = true;
1803 
1804 	else if (le16_to_cpu(rp->lmp_subver) <= 0x1899 &&
1805 		 le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_1)
1806 		is_fake = true;
1807 
1808 	else if (le16_to_cpu(rp->lmp_subver) <= 0x22bb &&
1809 		 le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_4_0)
1810 		is_fake = true;
1811 
1812 	if (is_fake) {
1813 		bt_dev_warn(hdev, "CSR: Unbranded CSR clone detected; adding workarounds...");
1814 
1815 		/* Generally these clones have big discrepancies between
1816 		 * advertised features and what's actually supported.
1817 		 * Probably will need to be expanded in the future;
1818 		 * without these the controller will lock up.
1819 		 */
1820 		set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
1821 		set_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks);
1822 
1823 		/* Clear the reset quirk since this is not an actual
1824 		 * early Bluetooth 1.1 device from CSR.
1825 		 */
1826 		clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1827 		clear_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
1828 	}
1829 
1830 	kfree_skb(skb);
1831 
1832 	return 0;
1833 }
1834 
1835 static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
1836 						       struct intel_version *ver)
1837 {
1838 	const struct firmware *fw;
1839 	char fwname[64];
1840 	int ret;
1841 
1842 	snprintf(fwname, sizeof(fwname),
1843 		 "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
1844 		 ver->hw_platform, ver->hw_variant, ver->hw_revision,
1845 		 ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
1846 		 ver->fw_build_ww, ver->fw_build_yy);
1847 
1848 	ret = request_firmware(&fw, fwname, &hdev->dev);
1849 	if (ret < 0) {
1850 		if (ret == -EINVAL) {
1851 			bt_dev_err(hdev, "Intel firmware file request failed (%d)",
1852 				   ret);
1853 			return NULL;
1854 		}
1855 
1856 		bt_dev_err(hdev, "failed to open Intel firmware file: %s (%d)",
1857 			   fwname, ret);
1858 
1859 		/* If the correct firmware patch file is not found, use the
1860 		 * default firmware patch file instead
1861 		 */
1862 		snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
1863 			 ver->hw_platform, ver->hw_variant);
1864 		if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
1865 			bt_dev_err(hdev, "failed to open default fw file: %s",
1866 				   fwname);
1867 			return NULL;
1868 		}
1869 	}
1870 
1871 	bt_dev_info(hdev, "Intel Bluetooth firmware file: %s", fwname);
1872 
1873 	return fw;
1874 }
1875 
1876 static int btusb_setup_intel_patching(struct hci_dev *hdev,
1877 				      const struct firmware *fw,
1878 				      const u8 **fw_ptr, int *disable_patch)
1879 {
1880 	struct sk_buff *skb;
1881 	struct hci_command_hdr *cmd;
1882 	const u8 *cmd_param;
1883 	struct hci_event_hdr *evt = NULL;
1884 	const u8 *evt_param = NULL;
1885 	int remain = fw->size - (*fw_ptr - fw->data);
1886 
1887 	/* The first byte indicates the types of the patch command or event.
1888 	 * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
1889 	 * in the current firmware buffer doesn't start with 0x01 or
1890 	 * the size of remain buffer is smaller than HCI command header,
1891 	 * the firmware file is corrupted and it should stop the patching
1892 	 * process.
1893 	 */
1894 	if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
1895 		bt_dev_err(hdev, "Intel fw corrupted: invalid cmd read");
1896 		return -EINVAL;
1897 	}
1898 	(*fw_ptr)++;
1899 	remain--;
1900 
1901 	cmd = (struct hci_command_hdr *)(*fw_ptr);
1902 	*fw_ptr += sizeof(*cmd);
1903 	remain -= sizeof(*cmd);
1904 
1905 	/* Ensure that the remain firmware data is long enough than the length
1906 	 * of command parameter. If not, the firmware file is corrupted.
1907 	 */
1908 	if (remain < cmd->plen) {
1909 		bt_dev_err(hdev, "Intel fw corrupted: invalid cmd len");
1910 		return -EFAULT;
1911 	}
1912 
1913 	/* If there is a command that loads a patch in the firmware
1914 	 * file, then enable the patch upon success, otherwise just
1915 	 * disable the manufacturer mode, for example patch activation
1916 	 * is not required when the default firmware patch file is used
1917 	 * because there are no patch data to load.
1918 	 */
1919 	if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
1920 		*disable_patch = 0;
1921 
1922 	cmd_param = *fw_ptr;
1923 	*fw_ptr += cmd->plen;
1924 	remain -= cmd->plen;
1925 
1926 	/* This reads the expected events when the above command is sent to the
1927 	 * device. Some vendor commands expects more than one events, for
1928 	 * example command status event followed by vendor specific event.
1929 	 * For this case, it only keeps the last expected event. so the command
1930 	 * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
1931 	 * last expected event.
1932 	 */
1933 	while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
1934 		(*fw_ptr)++;
1935 		remain--;
1936 
1937 		evt = (struct hci_event_hdr *)(*fw_ptr);
1938 		*fw_ptr += sizeof(*evt);
1939 		remain -= sizeof(*evt);
1940 
1941 		if (remain < evt->plen) {
1942 			bt_dev_err(hdev, "Intel fw corrupted: invalid evt len");
1943 			return -EFAULT;
1944 		}
1945 
1946 		evt_param = *fw_ptr;
1947 		*fw_ptr += evt->plen;
1948 		remain -= evt->plen;
1949 	}
1950 
1951 	/* Every HCI commands in the firmware file has its correspond event.
1952 	 * If event is not found or remain is smaller than zero, the firmware
1953 	 * file is corrupted.
1954 	 */
1955 	if (!evt || !evt_param || remain < 0) {
1956 		bt_dev_err(hdev, "Intel fw corrupted: invalid evt read");
1957 		return -EFAULT;
1958 	}
1959 
1960 	skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
1961 				cmd_param, evt->evt, HCI_INIT_TIMEOUT);
1962 	if (IS_ERR(skb)) {
1963 		bt_dev_err(hdev, "sending Intel patch command (0x%4.4x) failed (%ld)",
1964 			   cmd->opcode, PTR_ERR(skb));
1965 		return PTR_ERR(skb);
1966 	}
1967 
1968 	/* It ensures that the returned event matches the event data read from
1969 	 * the firmware file. At fist, it checks the length and then
1970 	 * the contents of the event.
1971 	 */
1972 	if (skb->len != evt->plen) {
1973 		bt_dev_err(hdev, "mismatch event length (opcode 0x%4.4x)",
1974 			   le16_to_cpu(cmd->opcode));
1975 		kfree_skb(skb);
1976 		return -EFAULT;
1977 	}
1978 
1979 	if (memcmp(skb->data, evt_param, evt->plen)) {
1980 		bt_dev_err(hdev, "mismatch event parameter (opcode 0x%4.4x)",
1981 			   le16_to_cpu(cmd->opcode));
1982 		kfree_skb(skb);
1983 		return -EFAULT;
1984 	}
1985 	kfree_skb(skb);
1986 
1987 	return 0;
1988 }
1989 
1990 static int btusb_setup_intel(struct hci_dev *hdev)
1991 {
1992 	struct sk_buff *skb;
1993 	const struct firmware *fw;
1994 	const u8 *fw_ptr;
1995 	int disable_patch, err;
1996 	struct intel_version ver;
1997 
1998 	BT_DBG("%s", hdev->name);
1999 
2000 	/* The controller has a bug with the first HCI command sent to it
2001 	 * returning number of completed commands as zero. This would stall the
2002 	 * command processing in the Bluetooth core.
2003 	 *
2004 	 * As a workaround, send HCI Reset command first which will reset the
2005 	 * number of completed commands and allow normal command processing
2006 	 * from now on.
2007 	 */
2008 	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
2009 	if (IS_ERR(skb)) {
2010 		bt_dev_err(hdev, "sending initial HCI reset command failed (%ld)",
2011 			   PTR_ERR(skb));
2012 		return PTR_ERR(skb);
2013 	}
2014 	kfree_skb(skb);
2015 
2016 	/* Read Intel specific controller version first to allow selection of
2017 	 * which firmware file to load.
2018 	 *
2019 	 * The returned information are hardware variant and revision plus
2020 	 * firmware variant, revision and build number.
2021 	 */
2022 	err = btintel_read_version(hdev, &ver);
2023 	if (err)
2024 		return err;
2025 
2026 	bt_dev_info(hdev, "read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
2027 		    ver.hw_platform, ver.hw_variant, ver.hw_revision,
2028 		    ver.fw_variant,  ver.fw_revision, ver.fw_build_num,
2029 		    ver.fw_build_ww, ver.fw_build_yy, ver.fw_patch_num);
2030 
2031 	/* fw_patch_num indicates the version of patch the device currently
2032 	 * have. If there is no patch data in the device, it is always 0x00.
2033 	 * So, if it is other than 0x00, no need to patch the device again.
2034 	 */
2035 	if (ver.fw_patch_num) {
2036 		bt_dev_info(hdev, "Intel device is already patched. "
2037 			    "patch num: %02x", ver.fw_patch_num);
2038 		goto complete;
2039 	}
2040 
2041 	/* Opens the firmware patch file based on the firmware version read
2042 	 * from the controller. If it fails to open the matching firmware
2043 	 * patch file, it tries to open the default firmware patch file.
2044 	 * If no patch file is found, allow the device to operate without
2045 	 * a patch.
2046 	 */
2047 	fw = btusb_setup_intel_get_fw(hdev, &ver);
2048 	if (!fw)
2049 		goto complete;
2050 	fw_ptr = fw->data;
2051 
2052 	/* Enable the manufacturer mode of the controller.
2053 	 * Only while this mode is enabled, the driver can download the
2054 	 * firmware patch data and configuration parameters.
2055 	 */
2056 	err = btintel_enter_mfg(hdev);
2057 	if (err) {
2058 		release_firmware(fw);
2059 		return err;
2060 	}
2061 
2062 	disable_patch = 1;
2063 
2064 	/* The firmware data file consists of list of Intel specific HCI
2065 	 * commands and its expected events. The first byte indicates the
2066 	 * type of the message, either HCI command or HCI event.
2067 	 *
2068 	 * It reads the command and its expected event from the firmware file,
2069 	 * and send to the controller. Once __hci_cmd_sync_ev() returns,
2070 	 * the returned event is compared with the event read from the firmware
2071 	 * file and it will continue until all the messages are downloaded to
2072 	 * the controller.
2073 	 *
2074 	 * Once the firmware patching is completed successfully,
2075 	 * the manufacturer mode is disabled with reset and activating the
2076 	 * downloaded patch.
2077 	 *
2078 	 * If the firmware patching fails, the manufacturer mode is
2079 	 * disabled with reset and deactivating the patch.
2080 	 *
2081 	 * If the default patch file is used, no reset is done when disabling
2082 	 * the manufacturer.
2083 	 */
2084 	while (fw->size > fw_ptr - fw->data) {
2085 		int ret;
2086 
2087 		ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
2088 						 &disable_patch);
2089 		if (ret < 0)
2090 			goto exit_mfg_deactivate;
2091 	}
2092 
2093 	release_firmware(fw);
2094 
2095 	if (disable_patch)
2096 		goto exit_mfg_disable;
2097 
2098 	/* Patching completed successfully and disable the manufacturer mode
2099 	 * with reset and activate the downloaded firmware patches.
2100 	 */
2101 	err = btintel_exit_mfg(hdev, true, true);
2102 	if (err)
2103 		return err;
2104 
2105 	/* Need build number for downloaded fw patches in
2106 	 * every power-on boot
2107 	 */
2108        err = btintel_read_version(hdev, &ver);
2109        if (err)
2110                return err;
2111        bt_dev_info(hdev, "Intel BT fw patch 0x%02x completed & activated",
2112 		   ver.fw_patch_num);
2113 
2114 	goto complete;
2115 
2116 exit_mfg_disable:
2117 	/* Disable the manufacturer mode without reset */
2118 	err = btintel_exit_mfg(hdev, false, false);
2119 	if (err)
2120 		return err;
2121 
2122 	bt_dev_info(hdev, "Intel firmware patch completed");
2123 
2124 	goto complete;
2125 
2126 exit_mfg_deactivate:
2127 	release_firmware(fw);
2128 
2129 	/* Patching failed. Disable the manufacturer mode with reset and
2130 	 * deactivate the downloaded firmware patches.
2131 	 */
2132 	err = btintel_exit_mfg(hdev, true, false);
2133 	if (err)
2134 		return err;
2135 
2136 	bt_dev_info(hdev, "Intel firmware patch completed and deactivated");
2137 
2138 complete:
2139 	/* Set the event mask for Intel specific vendor events. This enables
2140 	 * a few extra events that are useful during general operation.
2141 	 */
2142 	btintel_set_event_mask_mfg(hdev, false);
2143 
2144 	btintel_check_bdaddr(hdev);
2145 	return 0;
2146 }
2147 
2148 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
2149 {
2150 	struct sk_buff *skb;
2151 	struct hci_event_hdr *hdr;
2152 	struct hci_ev_cmd_complete *evt;
2153 
2154 	skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
2155 	if (!skb)
2156 		return -ENOMEM;
2157 
2158 	hdr = skb_put(skb, sizeof(*hdr));
2159 	hdr->evt = HCI_EV_CMD_COMPLETE;
2160 	hdr->plen = sizeof(*evt) + 1;
2161 
2162 	evt = skb_put(skb, sizeof(*evt));
2163 	evt->ncmd = 0x01;
2164 	evt->opcode = cpu_to_le16(opcode);
2165 
2166 	skb_put_u8(skb, 0x00);
2167 
2168 	hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2169 
2170 	return hci_recv_frame(hdev, skb);
2171 }
2172 
2173 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
2174 				 int count)
2175 {
2176 	/* When the device is in bootloader mode, then it can send
2177 	 * events via the bulk endpoint. These events are treated the
2178 	 * same way as the ones received from the interrupt endpoint.
2179 	 */
2180 	if (test_bit(BTUSB_BOOTLOADER, &data->flags))
2181 		return btusb_recv_intr(data, buffer, count);
2182 
2183 	return btusb_recv_bulk(data, buffer, count);
2184 }
2185 
2186 static void btusb_intel_bootup(struct btusb_data *data, const void *ptr,
2187 			       unsigned int len)
2188 {
2189 	const struct intel_bootup *evt = ptr;
2190 
2191 	if (len != sizeof(*evt))
2192 		return;
2193 
2194 	if (test_and_clear_bit(BTUSB_BOOTING, &data->flags))
2195 		wake_up_bit(&data->flags, BTUSB_BOOTING);
2196 }
2197 
2198 static void btusb_intel_secure_send_result(struct btusb_data *data,
2199 					   const void *ptr, unsigned int len)
2200 {
2201 	const struct intel_secure_send_result *evt = ptr;
2202 
2203 	if (len != sizeof(*evt))
2204 		return;
2205 
2206 	if (evt->result)
2207 		set_bit(BTUSB_FIRMWARE_FAILED, &data->flags);
2208 
2209 	if (test_and_clear_bit(BTUSB_DOWNLOADING, &data->flags) &&
2210 	    test_bit(BTUSB_FIRMWARE_LOADED, &data->flags))
2211 		wake_up_bit(&data->flags, BTUSB_DOWNLOADING);
2212 }
2213 
2214 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
2215 {
2216 	struct btusb_data *data = hci_get_drvdata(hdev);
2217 
2218 	if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
2219 		struct hci_event_hdr *hdr = (void *)skb->data;
2220 
2221 		if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
2222 		    hdr->plen > 0) {
2223 			const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
2224 			unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
2225 
2226 			switch (skb->data[2]) {
2227 			case 0x02:
2228 				/* When switching to the operational firmware
2229 				 * the device sends a vendor specific event
2230 				 * indicating that the bootup completed.
2231 				 */
2232 				btusb_intel_bootup(data, ptr, len);
2233 				break;
2234 			case 0x06:
2235 				/* When the firmware loading completes the
2236 				 * device sends out a vendor specific event
2237 				 * indicating the result of the firmware
2238 				 * loading.
2239 				 */
2240 				btusb_intel_secure_send_result(data, ptr, len);
2241 				break;
2242 			}
2243 		}
2244 	}
2245 
2246 	return hci_recv_frame(hdev, skb);
2247 }
2248 
2249 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
2250 {
2251 	struct btusb_data *data = hci_get_drvdata(hdev);
2252 	struct urb *urb;
2253 
2254 	BT_DBG("%s", hdev->name);
2255 
2256 	switch (hci_skb_pkt_type(skb)) {
2257 	case HCI_COMMAND_PKT:
2258 		if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
2259 			struct hci_command_hdr *cmd = (void *)skb->data;
2260 			__u16 opcode = le16_to_cpu(cmd->opcode);
2261 
2262 			/* When in bootloader mode and the command 0xfc09
2263 			 * is received, it needs to be send down the
2264 			 * bulk endpoint. So allocate a bulk URB instead.
2265 			 */
2266 			if (opcode == 0xfc09)
2267 				urb = alloc_bulk_urb(hdev, skb);
2268 			else
2269 				urb = alloc_ctrl_urb(hdev, skb);
2270 
2271 			/* When the 0xfc01 command is issued to boot into
2272 			 * the operational firmware, it will actually not
2273 			 * send a command complete event. To keep the flow
2274 			 * control working inject that event here.
2275 			 */
2276 			if (opcode == 0xfc01)
2277 				inject_cmd_complete(hdev, opcode);
2278 		} else {
2279 			urb = alloc_ctrl_urb(hdev, skb);
2280 		}
2281 		if (IS_ERR(urb))
2282 			return PTR_ERR(urb);
2283 
2284 		hdev->stat.cmd_tx++;
2285 		return submit_or_queue_tx_urb(hdev, urb);
2286 
2287 	case HCI_ACLDATA_PKT:
2288 		urb = alloc_bulk_urb(hdev, skb);
2289 		if (IS_ERR(urb))
2290 			return PTR_ERR(urb);
2291 
2292 		hdev->stat.acl_tx++;
2293 		return submit_or_queue_tx_urb(hdev, urb);
2294 
2295 	case HCI_SCODATA_PKT:
2296 		if (hci_conn_num(hdev, SCO_LINK) < 1)
2297 			return -ENODEV;
2298 
2299 		urb = alloc_isoc_urb(hdev, skb);
2300 		if (IS_ERR(urb))
2301 			return PTR_ERR(urb);
2302 
2303 		hdev->stat.sco_tx++;
2304 		return submit_tx_urb(hdev, urb);
2305 	}
2306 
2307 	return -EILSEQ;
2308 }
2309 
2310 static bool btusb_setup_intel_new_get_fw_name(struct intel_version *ver,
2311 					     struct intel_boot_params *params,
2312 					     char *fw_name, size_t len,
2313 					     const char *suffix)
2314 {
2315 	switch (ver->hw_variant) {
2316 	case 0x0b:	/* SfP */
2317 	case 0x0c:	/* WsP */
2318 		snprintf(fw_name, len, "intel/ibt-%u-%u.%s",
2319 			le16_to_cpu(ver->hw_variant),
2320 			le16_to_cpu(params->dev_revid),
2321 			suffix);
2322 		break;
2323 	case 0x11:	/* JfP */
2324 	case 0x12:	/* ThP */
2325 	case 0x13:	/* HrP */
2326 	case 0x14:	/* CcP */
2327 		snprintf(fw_name, len, "intel/ibt-%u-%u-%u.%s",
2328 			le16_to_cpu(ver->hw_variant),
2329 			le16_to_cpu(ver->hw_revision),
2330 			le16_to_cpu(ver->fw_revision),
2331 			suffix);
2332 		break;
2333 	default:
2334 		return false;
2335 	}
2336 	return true;
2337 }
2338 
2339 static int btusb_intel_download_firmware(struct hci_dev *hdev,
2340 					 struct intel_version *ver,
2341 					 struct intel_boot_params *params)
2342 {
2343 	const struct firmware *fw;
2344 	u32 boot_param;
2345 	char fwname[64];
2346 	int err;
2347 	struct btusb_data *data = hci_get_drvdata(hdev);
2348 
2349 	if (!ver || !params)
2350 		return -EINVAL;
2351 
2352 	/* The hardware platform number has a fixed value of 0x37 and
2353 	 * for now only accept this single value.
2354 	 */
2355 	if (ver->hw_platform != 0x37) {
2356 		bt_dev_err(hdev, "Unsupported Intel hardware platform (%u)",
2357 			   ver->hw_platform);
2358 		return -EINVAL;
2359 	}
2360 
2361 	/* Check for supported iBT hardware variants of this firmware
2362 	 * loading method.
2363 	 *
2364 	 * This check has been put in place to ensure correct forward
2365 	 * compatibility options when newer hardware variants come along.
2366 	 */
2367 	switch (ver->hw_variant) {
2368 	case 0x0b:	/* SfP */
2369 	case 0x0c:	/* WsP */
2370 	case 0x11:	/* JfP */
2371 	case 0x12:	/* ThP */
2372 	case 0x13:	/* HrP */
2373 	case 0x14:	/* CcP */
2374 		break;
2375 	default:
2376 		bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
2377 			   ver->hw_variant);
2378 		return -EINVAL;
2379 	}
2380 
2381 	btintel_version_info(hdev, ver);
2382 
2383 	/* The firmware variant determines if the device is in bootloader
2384 	 * mode or is running operational firmware. The value 0x06 identifies
2385 	 * the bootloader and the value 0x23 identifies the operational
2386 	 * firmware.
2387 	 *
2388 	 * When the operational firmware is already present, then only
2389 	 * the check for valid Bluetooth device address is needed. This
2390 	 * determines if the device will be added as configured or
2391 	 * unconfigured controller.
2392 	 *
2393 	 * It is not possible to use the Secure Boot Parameters in this
2394 	 * case since that command is only available in bootloader mode.
2395 	 */
2396 	if (ver->fw_variant == 0x23) {
2397 		clear_bit(BTUSB_BOOTLOADER, &data->flags);
2398 		btintel_check_bdaddr(hdev);
2399 		return 0;
2400 	}
2401 
2402 	/* If the device is not in bootloader mode, then the only possible
2403 	 * choice is to return an error and abort the device initialization.
2404 	 */
2405 	if (ver->fw_variant != 0x06) {
2406 		bt_dev_err(hdev, "Unsupported Intel firmware variant (%u)",
2407 			   ver->fw_variant);
2408 		return -ENODEV;
2409 	}
2410 
2411 	/* Read the secure boot parameters to identify the operating
2412 	 * details of the bootloader.
2413 	 */
2414 	err = btintel_read_boot_params(hdev, params);
2415 	if (err)
2416 		return err;
2417 
2418 	/* It is required that every single firmware fragment is acknowledged
2419 	 * with a command complete event. If the boot parameters indicate
2420 	 * that this bootloader does not send them, then abort the setup.
2421 	 */
2422 	if (params->limited_cce != 0x00) {
2423 		bt_dev_err(hdev, "Unsupported Intel firmware loading method (%u)",
2424 			   params->limited_cce);
2425 		return -EINVAL;
2426 	}
2427 
2428 	/* If the OTP has no valid Bluetooth device address, then there will
2429 	 * also be no valid address for the operational firmware.
2430 	 */
2431 	if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
2432 		bt_dev_info(hdev, "No device address configured");
2433 		set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
2434 	}
2435 
2436 	/* With this Intel bootloader only the hardware variant and device
2437 	 * revision information are used to select the right firmware for SfP
2438 	 * and WsP.
2439 	 *
2440 	 * The firmware filename is ibt-<hw_variant>-<dev_revid>.sfi.
2441 	 *
2442 	 * Currently the supported hardware variants are:
2443 	 *   11 (0x0b) for iBT3.0 (LnP/SfP)
2444 	 *   12 (0x0c) for iBT3.5 (WsP)
2445 	 *
2446 	 * For ThP/JfP and for future SKU's, the FW name varies based on HW
2447 	 * variant, HW revision and FW revision, as these are dependent on CNVi
2448 	 * and RF Combination.
2449 	 *
2450 	 *   17 (0x11) for iBT3.5 (JfP)
2451 	 *   18 (0x12) for iBT3.5 (ThP)
2452 	 *
2453 	 * The firmware file name for these will be
2454 	 * ibt-<hw_variant>-<hw_revision>-<fw_revision>.sfi.
2455 	 *
2456 	 */
2457 	err = btusb_setup_intel_new_get_fw_name(ver, params, fwname,
2458 						sizeof(fwname), "sfi");
2459 	if (!err) {
2460 		bt_dev_err(hdev, "Unsupported Intel firmware naming");
2461 		return -EINVAL;
2462 	}
2463 
2464 	err = request_firmware(&fw, fwname, &hdev->dev);
2465 	if (err < 0) {
2466 		bt_dev_err(hdev, "Failed to load Intel firmware file (%d)", err);
2467 		return err;
2468 	}
2469 
2470 	bt_dev_info(hdev, "Found device firmware: %s", fwname);
2471 
2472 	if (fw->size < 644) {
2473 		bt_dev_err(hdev, "Invalid size of firmware file (%zu)",
2474 			   fw->size);
2475 		err = -EBADF;
2476 		goto done;
2477 	}
2478 
2479 	set_bit(BTUSB_DOWNLOADING, &data->flags);
2480 
2481 	/* Start firmware downloading and get boot parameter */
2482 	err = btintel_download_firmware(hdev, fw, &boot_param);
2483 	if (err < 0) {
2484 		/* When FW download fails, send Intel Reset to retry
2485 		 * FW download.
2486 		 */
2487 		btintel_reset_to_bootloader(hdev);
2488 		goto done;
2489 	}
2490 	set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
2491 
2492 	bt_dev_info(hdev, "Waiting for firmware download to complete");
2493 
2494 	/* Before switching the device into operational mode and with that
2495 	 * booting the loaded firmware, wait for the bootloader notification
2496 	 * that all fragments have been successfully received.
2497 	 *
2498 	 * When the event processing receives the notification, then the
2499 	 * BTUSB_DOWNLOADING flag will be cleared.
2500 	 *
2501 	 * The firmware loading should not take longer than 5 seconds
2502 	 * and thus just timeout if that happens and fail the setup
2503 	 * of this device.
2504 	 */
2505 	err = wait_on_bit_timeout(&data->flags, BTUSB_DOWNLOADING,
2506 				  TASK_INTERRUPTIBLE,
2507 				  msecs_to_jiffies(5000));
2508 	if (err == -EINTR) {
2509 		bt_dev_err(hdev, "Firmware loading interrupted");
2510 		goto done;
2511 	}
2512 
2513 	if (err) {
2514 		bt_dev_err(hdev, "Firmware loading timeout");
2515 		err = -ETIMEDOUT;
2516 		btintel_reset_to_bootloader(hdev);
2517 		goto done;
2518 	}
2519 
2520 	if (test_bit(BTUSB_FIRMWARE_FAILED, &data->flags)) {
2521 		bt_dev_err(hdev, "Firmware loading failed");
2522 		err = -ENOEXEC;
2523 		goto done;
2524 	}
2525 
2526 done:
2527 	release_firmware(fw);
2528 	return err;
2529 }
2530 
2531 static int btusb_setup_intel_new(struct hci_dev *hdev)
2532 {
2533 	struct btusb_data *data = hci_get_drvdata(hdev);
2534 	struct intel_version ver;
2535 	struct intel_boot_params params;
2536 	u32 boot_param;
2537 	char ddcname[64];
2538 	ktime_t calltime, delta, rettime;
2539 	unsigned long long duration;
2540 	int err;
2541 	struct intel_debug_features features;
2542 
2543 	BT_DBG("%s", hdev->name);
2544 
2545 	/* Set the default boot parameter to 0x0 and it is updated to
2546 	 * SKU specific boot parameter after reading Intel_Write_Boot_Params
2547 	 * command while downloading the firmware.
2548 	 */
2549 	boot_param = 0x00000000;
2550 
2551 	calltime = ktime_get();
2552 
2553 	/* Read the Intel version information to determine if the device
2554 	 * is in bootloader mode or if it already has operational firmware
2555 	 * loaded.
2556 	 */
2557 	err = btintel_read_version(hdev, &ver);
2558 	if (err) {
2559 		bt_dev_err(hdev, "Intel Read version failed (%d)", err);
2560 		btintel_reset_to_bootloader(hdev);
2561 		return err;
2562 	}
2563 
2564 	err = btusb_intel_download_firmware(hdev, &ver, &params);
2565 	if (err)
2566 		return err;
2567 
2568 	/* controller is already having an operational firmware */
2569 	if (ver.fw_variant == 0x23)
2570 		goto finish;
2571 
2572 	rettime = ktime_get();
2573 	delta = ktime_sub(rettime, calltime);
2574 	duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2575 
2576 	bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration);
2577 
2578 	calltime = ktime_get();
2579 
2580 	set_bit(BTUSB_BOOTING, &data->flags);
2581 
2582 	err = btintel_send_intel_reset(hdev, boot_param);
2583 	if (err) {
2584 		bt_dev_err(hdev, "Intel Soft Reset failed (%d)", err);
2585 		btintel_reset_to_bootloader(hdev);
2586 		return err;
2587 	}
2588 
2589 	/* The bootloader will not indicate when the device is ready. This
2590 	 * is done by the operational firmware sending bootup notification.
2591 	 *
2592 	 * Booting into operational firmware should not take longer than
2593 	 * 1 second. However if that happens, then just fail the setup
2594 	 * since something went wrong.
2595 	 */
2596 	bt_dev_info(hdev, "Waiting for device to boot");
2597 
2598 	err = wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,
2599 				  TASK_INTERRUPTIBLE,
2600 				  msecs_to_jiffies(1000));
2601 
2602 	if (err == -EINTR) {
2603 		bt_dev_err(hdev, "Device boot interrupted");
2604 		return -EINTR;
2605 	}
2606 
2607 	if (err) {
2608 		bt_dev_err(hdev, "Device boot timeout");
2609 		btintel_reset_to_bootloader(hdev);
2610 		return -ETIMEDOUT;
2611 	}
2612 
2613 	rettime = ktime_get();
2614 	delta = ktime_sub(rettime, calltime);
2615 	duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2616 
2617 	bt_dev_info(hdev, "Device booted in %llu usecs", duration);
2618 
2619 	clear_bit(BTUSB_BOOTLOADER, &data->flags);
2620 
2621 	err = btusb_setup_intel_new_get_fw_name(&ver, &params, ddcname,
2622 						sizeof(ddcname), "ddc");
2623 
2624 	if (!err) {
2625 		bt_dev_err(hdev, "Unsupported Intel firmware naming");
2626 	} else {
2627 		/* Once the device is running in operational mode, it needs to
2628 		 * apply the device configuration (DDC) parameters.
2629 		 *
2630 		 * The device can work without DDC parameters, so even if it
2631 		 * fails to load the file, no need to fail the setup.
2632 		 */
2633 		btintel_load_ddc_config(hdev, ddcname);
2634 	}
2635 
2636 	/* Read the Intel supported features and if new exception formats
2637 	 * supported, need to load the additional DDC config to enable.
2638 	 */
2639 	btintel_read_debug_features(hdev, &features);
2640 
2641 	/* Set DDC mask for available debug features */
2642 	btintel_set_debug_features(hdev, &features);
2643 
2644 	/* Read the Intel version information after loading the FW  */
2645 	err = btintel_read_version(hdev, &ver);
2646 	if (err)
2647 		return err;
2648 
2649 	btintel_version_info(hdev, &ver);
2650 
2651 finish:
2652 	/* All Intel controllers that support the Microsoft vendor
2653 	 * extension are using 0xFC1E for VsMsftOpCode.
2654 	 */
2655 	switch (ver.hw_variant) {
2656 	case 0x12:	/* ThP */
2657 		hci_set_msft_opcode(hdev, 0xFC1E);
2658 		break;
2659 	}
2660 
2661 	/* Set the event mask for Intel specific vendor events. This enables
2662 	 * a few extra events that are useful during general operation. It
2663 	 * does not enable any debugging related events.
2664 	 *
2665 	 * The device will function correctly without these events enabled
2666 	 * and thus no need to fail the setup.
2667 	 */
2668 	btintel_set_event_mask(hdev, false);
2669 
2670 	return 0;
2671 }
2672 
2673 static int btusb_shutdown_intel(struct hci_dev *hdev)
2674 {
2675 	struct sk_buff *skb;
2676 	long ret;
2677 
2678 	/* In the shutdown sequence where Bluetooth is turned off followed
2679 	 * by WiFi being turned off, turning WiFi back on causes issue with
2680 	 * the RF calibration.
2681 	 *
2682 	 * To ensure that any RF activity has been stopped, issue HCI Reset
2683 	 * command to clear all ongoing activity including advertising,
2684 	 * scanning etc.
2685 	 */
2686 	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
2687 	if (IS_ERR(skb)) {
2688 		ret = PTR_ERR(skb);
2689 		bt_dev_err(hdev, "HCI reset during shutdown failed");
2690 		return ret;
2691 	}
2692 	kfree_skb(skb);
2693 
2694 	/* Some platforms have an issue with BT LED when the interface is
2695 	 * down or BT radio is turned off, which takes 5 seconds to BT LED
2696 	 * goes off. This command turns off the BT LED immediately.
2697 	 */
2698 	skb = __hci_cmd_sync(hdev, 0xfc3f, 0, NULL, HCI_INIT_TIMEOUT);
2699 	if (IS_ERR(skb)) {
2700 		ret = PTR_ERR(skb);
2701 		bt_dev_err(hdev, "turning off Intel device LED failed");
2702 		return ret;
2703 	}
2704 	kfree_skb(skb);
2705 
2706 	return 0;
2707 }
2708 
2709 static int btusb_shutdown_intel_new(struct hci_dev *hdev)
2710 {
2711 	struct sk_buff *skb;
2712 
2713 	/* Send HCI Reset to the controller to stop any BT activity which
2714 	 * were triggered. This will help to save power and maintain the
2715 	 * sync b/w Host and controller
2716 	 */
2717 	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
2718 	if (IS_ERR(skb)) {
2719 		bt_dev_err(hdev, "HCI reset during shutdown failed");
2720 		return PTR_ERR(skb);
2721 	}
2722 	kfree_skb(skb);
2723 
2724 	return 0;
2725 }
2726 
2727 #define FIRMWARE_MT7663		"mediatek/mt7663pr2h.bin"
2728 #define FIRMWARE_MT7668		"mediatek/mt7668pr2h.bin"
2729 
2730 #define HCI_WMT_MAX_EVENT_SIZE		64
2731 
2732 enum {
2733 	BTMTK_WMT_PATCH_DWNLD = 0x1,
2734 	BTMTK_WMT_FUNC_CTRL = 0x6,
2735 	BTMTK_WMT_RST = 0x7,
2736 	BTMTK_WMT_SEMAPHORE = 0x17,
2737 };
2738 
2739 enum {
2740 	BTMTK_WMT_INVALID,
2741 	BTMTK_WMT_PATCH_UNDONE,
2742 	BTMTK_WMT_PATCH_DONE,
2743 	BTMTK_WMT_ON_UNDONE,
2744 	BTMTK_WMT_ON_DONE,
2745 	BTMTK_WMT_ON_PROGRESS,
2746 };
2747 
2748 struct btmtk_wmt_hdr {
2749 	u8	dir;
2750 	u8	op;
2751 	__le16	dlen;
2752 	u8	flag;
2753 } __packed;
2754 
2755 struct btmtk_hci_wmt_cmd {
2756 	struct btmtk_wmt_hdr hdr;
2757 	u8 data[256];
2758 } __packed;
2759 
2760 struct btmtk_hci_wmt_evt {
2761 	struct hci_event_hdr hhdr;
2762 	struct btmtk_wmt_hdr whdr;
2763 } __packed;
2764 
2765 struct btmtk_hci_wmt_evt_funcc {
2766 	struct btmtk_hci_wmt_evt hwhdr;
2767 	__be16 status;
2768 } __packed;
2769 
2770 struct btmtk_tci_sleep {
2771 	u8 mode;
2772 	__le16 duration;
2773 	__le16 host_duration;
2774 	u8 host_wakeup_pin;
2775 	u8 time_compensation;
2776 } __packed;
2777 
2778 struct btmtk_hci_wmt_params {
2779 	u8 op;
2780 	u8 flag;
2781 	u16 dlen;
2782 	const void *data;
2783 	u32 *status;
2784 };
2785 
2786 static void btusb_mtk_wmt_recv(struct urb *urb)
2787 {
2788 	struct hci_dev *hdev = urb->context;
2789 	struct btusb_data *data = hci_get_drvdata(hdev);
2790 	struct hci_event_hdr *hdr;
2791 	struct sk_buff *skb;
2792 	int err;
2793 
2794 	if (urb->status == 0 && urb->actual_length > 0) {
2795 		hdev->stat.byte_rx += urb->actual_length;
2796 
2797 		/* WMT event shouldn't be fragmented and the size should be
2798 		 * less than HCI_WMT_MAX_EVENT_SIZE.
2799 		 */
2800 		skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
2801 		if (!skb) {
2802 			hdev->stat.err_rx++;
2803 			goto err_out;
2804 		}
2805 
2806 		hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2807 		skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
2808 
2809 		hdr = (void *)skb->data;
2810 		/* Fix up the vendor event id with 0xff for vendor specific
2811 		 * instead of 0xe4 so that event send via monitoring socket can
2812 		 * be parsed properly.
2813 		 */
2814 		hdr->evt = 0xff;
2815 
2816 		/* When someone waits for the WMT event, the skb is being cloned
2817 		 * and being processed the events from there then.
2818 		 */
2819 		if (test_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags)) {
2820 			data->evt_skb = skb_clone(skb, GFP_ATOMIC);
2821 			if (!data->evt_skb)
2822 				goto err_out;
2823 		}
2824 
2825 		err = hci_recv_frame(hdev, skb);
2826 		if (err < 0)
2827 			goto err_free_skb;
2828 
2829 		if (test_and_clear_bit(BTUSB_TX_WAIT_VND_EVT,
2830 				       &data->flags)) {
2831 			/* Barrier to sync with other CPUs */
2832 			smp_mb__after_atomic();
2833 			wake_up_bit(&data->flags,
2834 				    BTUSB_TX_WAIT_VND_EVT);
2835 		}
2836 err_out:
2837 		return;
2838 err_free_skb:
2839 		kfree_skb(data->evt_skb);
2840 		data->evt_skb = NULL;
2841 		return;
2842 	} else if (urb->status == -ENOENT) {
2843 		/* Avoid suspend failed when usb_kill_urb */
2844 		return;
2845 	}
2846 
2847 	usb_mark_last_busy(data->udev);
2848 
2849 	/* The URB complete handler is still called with urb->actual_length = 0
2850 	 * when the event is not available, so we should keep re-submitting
2851 	 * URB until WMT event returns, Also, It's necessary to wait some time
2852 	 * between the two consecutive control URBs to relax the target device
2853 	 * to generate the event. Otherwise, the WMT event cannot return from
2854 	 * the device successfully.
2855 	 */
2856 	udelay(100);
2857 
2858 	usb_anchor_urb(urb, &data->ctrl_anchor);
2859 	err = usb_submit_urb(urb, GFP_ATOMIC);
2860 	if (err < 0) {
2861 		/* -EPERM: urb is being killed;
2862 		 * -ENODEV: device got disconnected
2863 		 */
2864 		if (err != -EPERM && err != -ENODEV)
2865 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
2866 				   urb, -err);
2867 		usb_unanchor_urb(urb);
2868 	}
2869 }
2870 
2871 static int btusb_mtk_submit_wmt_recv_urb(struct hci_dev *hdev)
2872 {
2873 	struct btusb_data *data = hci_get_drvdata(hdev);
2874 	struct usb_ctrlrequest *dr;
2875 	unsigned char *buf;
2876 	int err, size = 64;
2877 	unsigned int pipe;
2878 	struct urb *urb;
2879 
2880 	urb = usb_alloc_urb(0, GFP_KERNEL);
2881 	if (!urb)
2882 		return -ENOMEM;
2883 
2884 	dr = kmalloc(sizeof(*dr), GFP_KERNEL);
2885 	if (!dr) {
2886 		usb_free_urb(urb);
2887 		return -ENOMEM;
2888 	}
2889 
2890 	dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
2891 	dr->bRequest     = 1;
2892 	dr->wIndex       = cpu_to_le16(0);
2893 	dr->wValue       = cpu_to_le16(48);
2894 	dr->wLength      = cpu_to_le16(size);
2895 
2896 	buf = kmalloc(size, GFP_KERNEL);
2897 	if (!buf) {
2898 		kfree(dr);
2899 		return -ENOMEM;
2900 	}
2901 
2902 	pipe = usb_rcvctrlpipe(data->udev, 0);
2903 
2904 	usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
2905 			     buf, size, btusb_mtk_wmt_recv, hdev);
2906 
2907 	urb->transfer_flags |= URB_FREE_BUFFER;
2908 
2909 	usb_anchor_urb(urb, &data->ctrl_anchor);
2910 	err = usb_submit_urb(urb, GFP_KERNEL);
2911 	if (err < 0) {
2912 		if (err != -EPERM && err != -ENODEV)
2913 			bt_dev_err(hdev, "urb %p submission failed (%d)",
2914 				   urb, -err);
2915 		usb_unanchor_urb(urb);
2916 	}
2917 
2918 	usb_free_urb(urb);
2919 
2920 	return err;
2921 }
2922 
2923 static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
2924 				  struct btmtk_hci_wmt_params *wmt_params)
2925 {
2926 	struct btusb_data *data = hci_get_drvdata(hdev);
2927 	struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
2928 	u32 hlen, status = BTMTK_WMT_INVALID;
2929 	struct btmtk_hci_wmt_evt *wmt_evt;
2930 	struct btmtk_hci_wmt_cmd wc;
2931 	struct btmtk_wmt_hdr *hdr;
2932 	int err;
2933 
2934 	/* Submit control IN URB on demand to process the WMT event */
2935 	err = btusb_mtk_submit_wmt_recv_urb(hdev);
2936 	if (err < 0)
2937 		return err;
2938 
2939 	/* Send the WMT command and wait until the WMT event returns */
2940 	hlen = sizeof(*hdr) + wmt_params->dlen;
2941 	if (hlen > 255)
2942 		return -EINVAL;
2943 
2944 	hdr = (struct btmtk_wmt_hdr *)&wc;
2945 	hdr->dir = 1;
2946 	hdr->op = wmt_params->op;
2947 	hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
2948 	hdr->flag = wmt_params->flag;
2949 	memcpy(wc.data, wmt_params->data, wmt_params->dlen);
2950 
2951 	set_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2952 
2953 	err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc);
2954 
2955 	if (err < 0) {
2956 		clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2957 		return err;
2958 	}
2959 
2960 	/* The vendor specific WMT commands are all answered by a vendor
2961 	 * specific event and will have the Command Status or Command
2962 	 * Complete as with usual HCI command flow control.
2963 	 *
2964 	 * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
2965 	 * state to be cleared. The driver specific event receive routine
2966 	 * will clear that state and with that indicate completion of the
2967 	 * WMT command.
2968 	 */
2969 	err = wait_on_bit_timeout(&data->flags, BTUSB_TX_WAIT_VND_EVT,
2970 				  TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
2971 	if (err == -EINTR) {
2972 		bt_dev_err(hdev, "Execution of wmt command interrupted");
2973 		clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2974 		return err;
2975 	}
2976 
2977 	if (err) {
2978 		bt_dev_err(hdev, "Execution of wmt command timed out");
2979 		clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2980 		return -ETIMEDOUT;
2981 	}
2982 
2983 	/* Parse and handle the return WMT event */
2984 	wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
2985 	if (wmt_evt->whdr.op != hdr->op) {
2986 		bt_dev_err(hdev, "Wrong op received %d expected %d",
2987 			   wmt_evt->whdr.op, hdr->op);
2988 		err = -EIO;
2989 		goto err_free_skb;
2990 	}
2991 
2992 	switch (wmt_evt->whdr.op) {
2993 	case BTMTK_WMT_SEMAPHORE:
2994 		if (wmt_evt->whdr.flag == 2)
2995 			status = BTMTK_WMT_PATCH_UNDONE;
2996 		else
2997 			status = BTMTK_WMT_PATCH_DONE;
2998 		break;
2999 	case BTMTK_WMT_FUNC_CTRL:
3000 		wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
3001 		if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
3002 			status = BTMTK_WMT_ON_DONE;
3003 		else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
3004 			status = BTMTK_WMT_ON_PROGRESS;
3005 		else
3006 			status = BTMTK_WMT_ON_UNDONE;
3007 		break;
3008 	}
3009 
3010 	if (wmt_params->status)
3011 		*wmt_params->status = status;
3012 
3013 err_free_skb:
3014 	kfree_skb(data->evt_skb);
3015 	data->evt_skb = NULL;
3016 
3017 	return err;
3018 }
3019 
3020 static int btusb_mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
3021 {
3022 	struct btmtk_hci_wmt_params wmt_params;
3023 	const struct firmware *fw;
3024 	const u8 *fw_ptr;
3025 	size_t fw_size;
3026 	int err, dlen;
3027 	u8 flag, param;
3028 
3029 	err = request_firmware(&fw, fwname, &hdev->dev);
3030 	if (err < 0) {
3031 		bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
3032 		return err;
3033 	}
3034 
3035 	/* Power on data RAM the firmware relies on. */
3036 	param = 1;
3037 	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3038 	wmt_params.flag = 3;
3039 	wmt_params.dlen = sizeof(param);
3040 	wmt_params.data = &param;
3041 	wmt_params.status = NULL;
3042 
3043 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3044 	if (err < 0) {
3045 		bt_dev_err(hdev, "Failed to power on data RAM (%d)", err);
3046 		return err;
3047 	}
3048 
3049 	fw_ptr = fw->data;
3050 	fw_size = fw->size;
3051 
3052 	/* The size of patch header is 30 bytes, should be skip */
3053 	if (fw_size < 30) {
3054 		err = -EINVAL;
3055 		goto err_release_fw;
3056 	}
3057 
3058 	fw_size -= 30;
3059 	fw_ptr += 30;
3060 	flag = 1;
3061 
3062 	wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
3063 	wmt_params.status = NULL;
3064 
3065 	while (fw_size > 0) {
3066 		dlen = min_t(int, 250, fw_size);
3067 
3068 		/* Tell deivice the position in sequence */
3069 		if (fw_size - dlen <= 0)
3070 			flag = 3;
3071 		else if (fw_size < fw->size - 30)
3072 			flag = 2;
3073 
3074 		wmt_params.flag = flag;
3075 		wmt_params.dlen = dlen;
3076 		wmt_params.data = fw_ptr;
3077 
3078 		err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3079 		if (err < 0) {
3080 			bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
3081 				   err);
3082 			goto err_release_fw;
3083 		}
3084 
3085 		fw_size -= dlen;
3086 		fw_ptr += dlen;
3087 	}
3088 
3089 	wmt_params.op = BTMTK_WMT_RST;
3090 	wmt_params.flag = 4;
3091 	wmt_params.dlen = 0;
3092 	wmt_params.data = NULL;
3093 	wmt_params.status = NULL;
3094 
3095 	/* Activate funciton the firmware providing to */
3096 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3097 	if (err < 0) {
3098 		bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
3099 		goto err_release_fw;
3100 	}
3101 
3102 	/* Wait a few moments for firmware activation done */
3103 	usleep_range(10000, 12000);
3104 
3105 err_release_fw:
3106 	release_firmware(fw);
3107 
3108 	return err;
3109 }
3110 
3111 static int btusb_mtk_func_query(struct hci_dev *hdev)
3112 {
3113 	struct btmtk_hci_wmt_params wmt_params;
3114 	int status, err;
3115 	u8 param = 0;
3116 
3117 	/* Query whether the function is enabled */
3118 	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3119 	wmt_params.flag = 4;
3120 	wmt_params.dlen = sizeof(param);
3121 	wmt_params.data = &param;
3122 	wmt_params.status = &status;
3123 
3124 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3125 	if (err < 0) {
3126 		bt_dev_err(hdev, "Failed to query function status (%d)", err);
3127 		return err;
3128 	}
3129 
3130 	return status;
3131 }
3132 
3133 static int btusb_mtk_reg_read(struct btusb_data *data, u32 reg, u32 *val)
3134 {
3135 	int pipe, err, size = sizeof(u32);
3136 	void *buf;
3137 
3138 	buf = kzalloc(size, GFP_KERNEL);
3139 	if (!buf)
3140 		return -ENOMEM;
3141 
3142 	pipe = usb_rcvctrlpipe(data->udev, 0);
3143 	err = usb_control_msg(data->udev, pipe, 0x63,
3144 			      USB_TYPE_VENDOR | USB_DIR_IN,
3145 			      reg >> 16, reg & 0xffff,
3146 			      buf, size, USB_CTRL_SET_TIMEOUT);
3147 	if (err < 0)
3148 		goto err_free_buf;
3149 
3150 	*val = get_unaligned_le32(buf);
3151 
3152 err_free_buf:
3153 	kfree(buf);
3154 
3155 	return err;
3156 }
3157 
3158 static int btusb_mtk_id_get(struct btusb_data *data, u32 *id)
3159 {
3160 	return btusb_mtk_reg_read(data, 0x80000008, id);
3161 }
3162 
3163 static int btusb_mtk_setup(struct hci_dev *hdev)
3164 {
3165 	struct btusb_data *data = hci_get_drvdata(hdev);
3166 	struct btmtk_hci_wmt_params wmt_params;
3167 	ktime_t calltime, delta, rettime;
3168 	struct btmtk_tci_sleep tci_sleep;
3169 	unsigned long long duration;
3170 	struct sk_buff *skb;
3171 	const char *fwname;
3172 	int err, status;
3173 	u32 dev_id;
3174 	u8 param;
3175 
3176 	calltime = ktime_get();
3177 
3178 	err = btusb_mtk_id_get(data, &dev_id);
3179 	if (err < 0) {
3180 		bt_dev_err(hdev, "Failed to get device id (%d)", err);
3181 		return err;
3182 	}
3183 
3184 	switch (dev_id) {
3185 	case 0x7663:
3186 		fwname = FIRMWARE_MT7663;
3187 		break;
3188 	case 0x7668:
3189 		fwname = FIRMWARE_MT7668;
3190 		break;
3191 	default:
3192 		bt_dev_err(hdev, "Unsupported support hardware variant (%08x)",
3193 			   dev_id);
3194 		return -ENODEV;
3195 	}
3196 
3197 	/* Query whether the firmware is already download */
3198 	wmt_params.op = BTMTK_WMT_SEMAPHORE;
3199 	wmt_params.flag = 1;
3200 	wmt_params.dlen = 0;
3201 	wmt_params.data = NULL;
3202 	wmt_params.status = &status;
3203 
3204 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3205 	if (err < 0) {
3206 		bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
3207 		return err;
3208 	}
3209 
3210 	if (status == BTMTK_WMT_PATCH_DONE) {
3211 		bt_dev_info(hdev, "firmware already downloaded");
3212 		goto ignore_setup_fw;
3213 	}
3214 
3215 	/* Setup a firmware which the device definitely requires */
3216 	err = btusb_mtk_setup_firmware(hdev, fwname);
3217 	if (err < 0)
3218 		return err;
3219 
3220 ignore_setup_fw:
3221 	err = readx_poll_timeout(btusb_mtk_func_query, hdev, status,
3222 				 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
3223 				 2000, 5000000);
3224 	/* -ETIMEDOUT happens */
3225 	if (err < 0)
3226 		return err;
3227 
3228 	/* The other errors happen in btusb_mtk_func_query */
3229 	if (status < 0)
3230 		return status;
3231 
3232 	if (status == BTMTK_WMT_ON_DONE) {
3233 		bt_dev_info(hdev, "function already on");
3234 		goto ignore_func_on;
3235 	}
3236 
3237 	/* Enable Bluetooth protocol */
3238 	param = 1;
3239 	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3240 	wmt_params.flag = 0;
3241 	wmt_params.dlen = sizeof(param);
3242 	wmt_params.data = &param;
3243 	wmt_params.status = NULL;
3244 
3245 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3246 	if (err < 0) {
3247 		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
3248 		return err;
3249 	}
3250 
3251 ignore_func_on:
3252 	/* Apply the low power environment setup */
3253 	tci_sleep.mode = 0x5;
3254 	tci_sleep.duration = cpu_to_le16(0x640);
3255 	tci_sleep.host_duration = cpu_to_le16(0x640);
3256 	tci_sleep.host_wakeup_pin = 0;
3257 	tci_sleep.time_compensation = 0;
3258 
3259 	skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
3260 			     HCI_INIT_TIMEOUT);
3261 	if (IS_ERR(skb)) {
3262 		err = PTR_ERR(skb);
3263 		bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
3264 		return err;
3265 	}
3266 	kfree_skb(skb);
3267 
3268 	rettime = ktime_get();
3269 	delta = ktime_sub(rettime, calltime);
3270 	duration = (unsigned long long)ktime_to_ns(delta) >> 10;
3271 
3272 	bt_dev_info(hdev, "Device setup in %llu usecs", duration);
3273 
3274 	return 0;
3275 }
3276 
3277 static int btusb_mtk_shutdown(struct hci_dev *hdev)
3278 {
3279 	struct btmtk_hci_wmt_params wmt_params;
3280 	u8 param = 0;
3281 	int err;
3282 
3283 	/* Disable the device */
3284 	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3285 	wmt_params.flag = 0;
3286 	wmt_params.dlen = sizeof(param);
3287 	wmt_params.data = &param;
3288 	wmt_params.status = NULL;
3289 
3290 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3291 	if (err < 0) {
3292 		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
3293 		return err;
3294 	}
3295 
3296 	return 0;
3297 }
3298 
3299 MODULE_FIRMWARE(FIRMWARE_MT7663);
3300 MODULE_FIRMWARE(FIRMWARE_MT7668);
3301 
3302 #ifdef CONFIG_PM
3303 /* Configure an out-of-band gpio as wake-up pin, if specified in device tree */
3304 static int marvell_config_oob_wake(struct hci_dev *hdev)
3305 {
3306 	struct sk_buff *skb;
3307 	struct btusb_data *data = hci_get_drvdata(hdev);
3308 	struct device *dev = &data->udev->dev;
3309 	u16 pin, gap, opcode;
3310 	int ret;
3311 	u8 cmd[5];
3312 
3313 	/* Move on if no wakeup pin specified */
3314 	if (of_property_read_u16(dev->of_node, "marvell,wakeup-pin", &pin) ||
3315 	    of_property_read_u16(dev->of_node, "marvell,wakeup-gap-ms", &gap))
3316 		return 0;
3317 
3318 	/* Vendor specific command to configure a GPIO as wake-up pin */
3319 	opcode = hci_opcode_pack(0x3F, 0x59);
3320 	cmd[0] = opcode & 0xFF;
3321 	cmd[1] = opcode >> 8;
3322 	cmd[2] = 2; /* length of parameters that follow */
3323 	cmd[3] = pin;
3324 	cmd[4] = gap; /* time in ms, for which wakeup pin should be asserted */
3325 
3326 	skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
3327 	if (!skb) {
3328 		bt_dev_err(hdev, "%s: No memory\n", __func__);
3329 		return -ENOMEM;
3330 	}
3331 
3332 	skb_put_data(skb, cmd, sizeof(cmd));
3333 	hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
3334 
3335 	ret = btusb_send_frame(hdev, skb);
3336 	if (ret) {
3337 		bt_dev_err(hdev, "%s: configuration failed\n", __func__);
3338 		kfree_skb(skb);
3339 		return ret;
3340 	}
3341 
3342 	return 0;
3343 }
3344 #endif
3345 
3346 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
3347 				    const bdaddr_t *bdaddr)
3348 {
3349 	struct sk_buff *skb;
3350 	u8 buf[8];
3351 	long ret;
3352 
3353 	buf[0] = 0xfe;
3354 	buf[1] = sizeof(bdaddr_t);
3355 	memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
3356 
3357 	skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
3358 	if (IS_ERR(skb)) {
3359 		ret = PTR_ERR(skb);
3360 		bt_dev_err(hdev, "changing Marvell device address failed (%ld)",
3361 			   ret);
3362 		return ret;
3363 	}
3364 	kfree_skb(skb);
3365 
3366 	return 0;
3367 }
3368 
3369 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
3370 				    const bdaddr_t *bdaddr)
3371 {
3372 	struct sk_buff *skb;
3373 	u8 buf[10];
3374 	long ret;
3375 
3376 	buf[0] = 0x01;
3377 	buf[1] = 0x01;
3378 	buf[2] = 0x00;
3379 	buf[3] = sizeof(bdaddr_t);
3380 	memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
3381 
3382 	skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
3383 	if (IS_ERR(skb)) {
3384 		ret = PTR_ERR(skb);
3385 		bt_dev_err(hdev, "Change address command failed (%ld)", ret);
3386 		return ret;
3387 	}
3388 	kfree_skb(skb);
3389 
3390 	return 0;
3391 }
3392 
3393 #define QCA_DFU_PACKET_LEN	4096
3394 
3395 #define QCA_GET_TARGET_VERSION	0x09
3396 #define QCA_CHECK_STATUS	0x05
3397 #define QCA_DFU_DOWNLOAD	0x01
3398 
3399 #define QCA_SYSCFG_UPDATED	0x40
3400 #define QCA_PATCH_UPDATED	0x80
3401 #define QCA_DFU_TIMEOUT		3000
3402 
3403 struct qca_version {
3404 	__le32	rom_version;
3405 	__le32	patch_version;
3406 	__le32	ram_version;
3407 	__le32	ref_clock;
3408 	__u8	reserved[4];
3409 } __packed;
3410 
3411 struct qca_rampatch_version {
3412 	__le16	rom_version;
3413 	__le16	patch_version;
3414 } __packed;
3415 
3416 struct qca_device_info {
3417 	u32	rom_version;
3418 	u8	rampatch_hdr;	/* length of header in rampatch */
3419 	u8	nvm_hdr;	/* length of header in NVM */
3420 	u8	ver_offset;	/* offset of version structure in rampatch */
3421 };
3422 
3423 static const struct qca_device_info qca_devices_table[] = {
3424 	{ 0x00000100, 20, 4, 10 }, /* Rome 1.0 */
3425 	{ 0x00000101, 20, 4, 10 }, /* Rome 1.1 */
3426 	{ 0x00000200, 28, 4, 18 }, /* Rome 2.0 */
3427 	{ 0x00000201, 28, 4, 18 }, /* Rome 2.1 */
3428 	{ 0x00000300, 28, 4, 18 }, /* Rome 3.0 */
3429 	{ 0x00000302, 28, 4, 18 }, /* Rome 3.2 */
3430 };
3431 
3432 static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 request,
3433 				     void *data, u16 size)
3434 {
3435 	int pipe, err;
3436 	u8 *buf;
3437 
3438 	buf = kmalloc(size, GFP_KERNEL);
3439 	if (!buf)
3440 		return -ENOMEM;
3441 
3442 	/* Found some of USB hosts have IOT issues with ours so that we should
3443 	 * not wait until HCI layer is ready.
3444 	 */
3445 	pipe = usb_rcvctrlpipe(udev, 0);
3446 	err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
3447 			      0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3448 	if (err < 0) {
3449 		dev_err(&udev->dev, "Failed to access otp area (%d)", err);
3450 		goto done;
3451 	}
3452 
3453 	memcpy(data, buf, size);
3454 
3455 done:
3456 	kfree(buf);
3457 
3458 	return err;
3459 }
3460 
3461 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
3462 				       const struct firmware *firmware,
3463 				       size_t hdr_size)
3464 {
3465 	struct btusb_data *btdata = hci_get_drvdata(hdev);
3466 	struct usb_device *udev = btdata->udev;
3467 	size_t count, size, sent = 0;
3468 	int pipe, len, err;
3469 	u8 *buf;
3470 
3471 	buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
3472 	if (!buf)
3473 		return -ENOMEM;
3474 
3475 	count = firmware->size;
3476 
3477 	size = min_t(size_t, count, hdr_size);
3478 	memcpy(buf, firmware->data, size);
3479 
3480 	/* USB patches should go down to controller through USB path
3481 	 * because binary format fits to go down through USB channel.
3482 	 * USB control path is for patching headers and USB bulk is for
3483 	 * patch body.
3484 	 */
3485 	pipe = usb_sndctrlpipe(udev, 0);
3486 	err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
3487 			      0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3488 	if (err < 0) {
3489 		bt_dev_err(hdev, "Failed to send headers (%d)", err);
3490 		goto done;
3491 	}
3492 
3493 	sent += size;
3494 	count -= size;
3495 
3496 	while (count) {
3497 		size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
3498 
3499 		memcpy(buf, firmware->data + sent, size);
3500 
3501 		pipe = usb_sndbulkpipe(udev, 0x02);
3502 		err = usb_bulk_msg(udev, pipe, buf, size, &len,
3503 				   QCA_DFU_TIMEOUT);
3504 		if (err < 0) {
3505 			bt_dev_err(hdev, "Failed to send body at %zd of %zd (%d)",
3506 				   sent, firmware->size, err);
3507 			break;
3508 		}
3509 
3510 		if (size != len) {
3511 			bt_dev_err(hdev, "Failed to get bulk buffer");
3512 			err = -EILSEQ;
3513 			break;
3514 		}
3515 
3516 		sent  += size;
3517 		count -= size;
3518 	}
3519 
3520 done:
3521 	kfree(buf);
3522 	return err;
3523 }
3524 
3525 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
3526 					 struct qca_version *ver,
3527 					 const struct qca_device_info *info)
3528 {
3529 	struct qca_rampatch_version *rver;
3530 	const struct firmware *fw;
3531 	u32 ver_rom, ver_patch;
3532 	u16 rver_rom, rver_patch;
3533 	char fwname[64];
3534 	int err;
3535 
3536 	ver_rom = le32_to_cpu(ver->rom_version);
3537 	ver_patch = le32_to_cpu(ver->patch_version);
3538 
3539 	snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
3540 
3541 	err = request_firmware(&fw, fwname, &hdev->dev);
3542 	if (err) {
3543 		bt_dev_err(hdev, "failed to request rampatch file: %s (%d)",
3544 			   fwname, err);
3545 		return err;
3546 	}
3547 
3548 	bt_dev_info(hdev, "using rampatch file: %s", fwname);
3549 
3550 	rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
3551 	rver_rom = le16_to_cpu(rver->rom_version);
3552 	rver_patch = le16_to_cpu(rver->patch_version);
3553 
3554 	bt_dev_info(hdev, "QCA: patch rome 0x%x build 0x%x, "
3555 		    "firmware rome 0x%x build 0x%x",
3556 		    rver_rom, rver_patch, ver_rom, ver_patch);
3557 
3558 	if (rver_rom != ver_rom || rver_patch <= ver_patch) {
3559 		bt_dev_err(hdev, "rampatch file version did not match with firmware");
3560 		err = -EINVAL;
3561 		goto done;
3562 	}
3563 
3564 	err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
3565 
3566 done:
3567 	release_firmware(fw);
3568 
3569 	return err;
3570 }
3571 
3572 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
3573 				    struct qca_version *ver,
3574 				    const struct qca_device_info *info)
3575 {
3576 	const struct firmware *fw;
3577 	char fwname[64];
3578 	int err;
3579 
3580 	snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin",
3581 		 le32_to_cpu(ver->rom_version));
3582 
3583 	err = request_firmware(&fw, fwname, &hdev->dev);
3584 	if (err) {
3585 		bt_dev_err(hdev, "failed to request NVM file: %s (%d)",
3586 			   fwname, err);
3587 		return err;
3588 	}
3589 
3590 	bt_dev_info(hdev, "using NVM file: %s", fwname);
3591 
3592 	err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
3593 
3594 	release_firmware(fw);
3595 
3596 	return err;
3597 }
3598 
3599 /* identify the ROM version and check whether patches are needed */
3600 static bool btusb_qca_need_patch(struct usb_device *udev)
3601 {
3602 	struct qca_version ver;
3603 
3604 	if (btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3605 				      sizeof(ver)) < 0)
3606 		return false;
3607 	/* only low ROM versions need patches */
3608 	return !(le32_to_cpu(ver.rom_version) & ~0xffffU);
3609 }
3610 
3611 static int btusb_setup_qca(struct hci_dev *hdev)
3612 {
3613 	struct btusb_data *btdata = hci_get_drvdata(hdev);
3614 	struct usb_device *udev = btdata->udev;
3615 	const struct qca_device_info *info = NULL;
3616 	struct qca_version ver;
3617 	u32 ver_rom;
3618 	u8 status;
3619 	int i, err;
3620 
3621 	err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3622 					sizeof(ver));
3623 	if (err < 0)
3624 		return err;
3625 
3626 	ver_rom = le32_to_cpu(ver.rom_version);
3627 	/* Don't care about high ROM versions */
3628 	if (ver_rom & ~0xffffU)
3629 		return 0;
3630 
3631 	for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
3632 		if (ver_rom == qca_devices_table[i].rom_version)
3633 			info = &qca_devices_table[i];
3634 	}
3635 	if (!info) {
3636 		bt_dev_err(hdev, "don't support firmware rome 0x%x", ver_rom);
3637 		return -ENODEV;
3638 	}
3639 
3640 	err = btusb_qca_send_vendor_req(udev, QCA_CHECK_STATUS, &status,
3641 					sizeof(status));
3642 	if (err < 0)
3643 		return err;
3644 
3645 	if (!(status & QCA_PATCH_UPDATED)) {
3646 		err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
3647 		if (err < 0)
3648 			return err;
3649 	}
3650 
3651 	if (!(status & QCA_SYSCFG_UPDATED)) {
3652 		err = btusb_setup_qca_load_nvm(hdev, &ver, info);
3653 		if (err < 0)
3654 			return err;
3655 	}
3656 
3657 	return 0;
3658 }
3659 
3660 static inline int __set_diag_interface(struct hci_dev *hdev)
3661 {
3662 	struct btusb_data *data = hci_get_drvdata(hdev);
3663 	struct usb_interface *intf = data->diag;
3664 	int i;
3665 
3666 	if (!data->diag)
3667 		return -ENODEV;
3668 
3669 	data->diag_tx_ep = NULL;
3670 	data->diag_rx_ep = NULL;
3671 
3672 	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3673 		struct usb_endpoint_descriptor *ep_desc;
3674 
3675 		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3676 
3677 		if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3678 			data->diag_tx_ep = ep_desc;
3679 			continue;
3680 		}
3681 
3682 		if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3683 			data->diag_rx_ep = ep_desc;
3684 			continue;
3685 		}
3686 	}
3687 
3688 	if (!data->diag_tx_ep || !data->diag_rx_ep) {
3689 		bt_dev_err(hdev, "invalid diagnostic descriptors");
3690 		return -ENODEV;
3691 	}
3692 
3693 	return 0;
3694 }
3695 
3696 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
3697 {
3698 	struct btusb_data *data = hci_get_drvdata(hdev);
3699 	struct sk_buff *skb;
3700 	struct urb *urb;
3701 	unsigned int pipe;
3702 
3703 	if (!data->diag_tx_ep)
3704 		return ERR_PTR(-ENODEV);
3705 
3706 	urb = usb_alloc_urb(0, GFP_KERNEL);
3707 	if (!urb)
3708 		return ERR_PTR(-ENOMEM);
3709 
3710 	skb = bt_skb_alloc(2, GFP_KERNEL);
3711 	if (!skb) {
3712 		usb_free_urb(urb);
3713 		return ERR_PTR(-ENOMEM);
3714 	}
3715 
3716 	skb_put_u8(skb, 0xf0);
3717 	skb_put_u8(skb, enable);
3718 
3719 	pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
3720 
3721 	usb_fill_bulk_urb(urb, data->udev, pipe,
3722 			  skb->data, skb->len, btusb_tx_complete, skb);
3723 
3724 	skb->dev = (void *)hdev;
3725 
3726 	return urb;
3727 }
3728 
3729 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
3730 {
3731 	struct btusb_data *data = hci_get_drvdata(hdev);
3732 	struct urb *urb;
3733 
3734 	if (!data->diag)
3735 		return -ENODEV;
3736 
3737 	if (!test_bit(HCI_RUNNING, &hdev->flags))
3738 		return -ENETDOWN;
3739 
3740 	urb = alloc_diag_urb(hdev, enable);
3741 	if (IS_ERR(urb))
3742 		return PTR_ERR(urb);
3743 
3744 	return submit_or_queue_tx_urb(hdev, urb);
3745 }
3746 
3747 #ifdef CONFIG_PM
3748 static irqreturn_t btusb_oob_wake_handler(int irq, void *priv)
3749 {
3750 	struct btusb_data *data = priv;
3751 
3752 	pm_wakeup_event(&data->udev->dev, 0);
3753 	pm_system_wakeup();
3754 
3755 	/* Disable only if not already disabled (keep it balanced) */
3756 	if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
3757 		disable_irq_nosync(irq);
3758 		disable_irq_wake(irq);
3759 	}
3760 	return IRQ_HANDLED;
3761 }
3762 
3763 static const struct of_device_id btusb_match_table[] = {
3764 	{ .compatible = "usb1286,204e" },
3765 	{ .compatible = "usbcf3,e300" }, /* QCA6174A */
3766 	{ .compatible = "usb4ca,301a" }, /* QCA6174A (Lite-On) */
3767 	{ }
3768 };
3769 MODULE_DEVICE_TABLE(of, btusb_match_table);
3770 
3771 /* Use an oob wakeup pin? */
3772 static int btusb_config_oob_wake(struct hci_dev *hdev)
3773 {
3774 	struct btusb_data *data = hci_get_drvdata(hdev);
3775 	struct device *dev = &data->udev->dev;
3776 	int irq, ret;
3777 
3778 	clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
3779 
3780 	if (!of_match_device(btusb_match_table, dev))
3781 		return 0;
3782 
3783 	/* Move on if no IRQ specified */
3784 	irq = of_irq_get_byname(dev->of_node, "wakeup");
3785 	if (irq <= 0) {
3786 		bt_dev_dbg(hdev, "%s: no OOB Wakeup IRQ in DT", __func__);
3787 		return 0;
3788 	}
3789 
3790 	irq_set_status_flags(irq, IRQ_NOAUTOEN);
3791 	ret = devm_request_irq(&hdev->dev, irq, btusb_oob_wake_handler,
3792 			       0, "OOB Wake-on-BT", data);
3793 	if (ret) {
3794 		bt_dev_err(hdev, "%s: IRQ request failed", __func__);
3795 		return ret;
3796 	}
3797 
3798 	ret = device_init_wakeup(dev, true);
3799 	if (ret) {
3800 		bt_dev_err(hdev, "%s: failed to init_wakeup", __func__);
3801 		return ret;
3802 	}
3803 
3804 	data->oob_wake_irq = irq;
3805 	bt_dev_info(hdev, "OOB Wake-on-BT configured at IRQ %u", irq);
3806 	return 0;
3807 }
3808 #endif
3809 
3810 static void btusb_check_needs_reset_resume(struct usb_interface *intf)
3811 {
3812 	if (dmi_check_system(btusb_needs_reset_resume_table))
3813 		interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
3814 }
3815 
3816 static bool btusb_prevent_wake(struct hci_dev *hdev)
3817 {
3818 	struct btusb_data *data = hci_get_drvdata(hdev);
3819 
3820 	if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
3821 		return true;
3822 
3823 	return !device_may_wakeup(&data->udev->dev);
3824 }
3825 
3826 static int btusb_probe(struct usb_interface *intf,
3827 		       const struct usb_device_id *id)
3828 {
3829 	struct usb_endpoint_descriptor *ep_desc;
3830 	struct gpio_desc *reset_gpio;
3831 	struct btusb_data *data;
3832 	struct hci_dev *hdev;
3833 	unsigned ifnum_base;
3834 	int i, err;
3835 
3836 	BT_DBG("intf %p id %p", intf, id);
3837 
3838 	/* interface numbers are hardcoded in the spec */
3839 	if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
3840 		if (!(id->driver_info & BTUSB_IFNUM_2))
3841 			return -ENODEV;
3842 		if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
3843 			return -ENODEV;
3844 	}
3845 
3846 	ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
3847 
3848 	if (!id->driver_info) {
3849 		const struct usb_device_id *match;
3850 
3851 		match = usb_match_id(intf, blacklist_table);
3852 		if (match)
3853 			id = match;
3854 	}
3855 
3856 	if (id->driver_info == BTUSB_IGNORE)
3857 		return -ENODEV;
3858 
3859 	if (id->driver_info & BTUSB_ATH3012) {
3860 		struct usb_device *udev = interface_to_usbdev(intf);
3861 
3862 		/* Old firmware would otherwise let ath3k driver load
3863 		 * patch and sysconfig files
3864 		 */
3865 		if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001 &&
3866 		    !btusb_qca_need_patch(udev))
3867 			return -ENODEV;
3868 	}
3869 
3870 	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
3871 	if (!data)
3872 		return -ENOMEM;
3873 
3874 	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3875 		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3876 
3877 		if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
3878 			data->intr_ep = ep_desc;
3879 			continue;
3880 		}
3881 
3882 		if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3883 			data->bulk_tx_ep = ep_desc;
3884 			continue;
3885 		}
3886 
3887 		if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3888 			data->bulk_rx_ep = ep_desc;
3889 			continue;
3890 		}
3891 	}
3892 
3893 	if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
3894 		return -ENODEV;
3895 
3896 	if (id->driver_info & BTUSB_AMP) {
3897 		data->cmdreq_type = USB_TYPE_CLASS | 0x01;
3898 		data->cmdreq = 0x2b;
3899 	} else {
3900 		data->cmdreq_type = USB_TYPE_CLASS;
3901 		data->cmdreq = 0x00;
3902 	}
3903 
3904 	data->udev = interface_to_usbdev(intf);
3905 	data->intf = intf;
3906 
3907 	INIT_WORK(&data->work, btusb_work);
3908 	INIT_WORK(&data->waker, btusb_waker);
3909 	init_usb_anchor(&data->deferred);
3910 	init_usb_anchor(&data->tx_anchor);
3911 	spin_lock_init(&data->txlock);
3912 
3913 	init_usb_anchor(&data->intr_anchor);
3914 	init_usb_anchor(&data->bulk_anchor);
3915 	init_usb_anchor(&data->isoc_anchor);
3916 	init_usb_anchor(&data->diag_anchor);
3917 	init_usb_anchor(&data->ctrl_anchor);
3918 	spin_lock_init(&data->rxlock);
3919 
3920 	if (id->driver_info & BTUSB_INTEL_NEW) {
3921 		data->recv_event = btusb_recv_event_intel;
3922 		data->recv_bulk = btusb_recv_bulk_intel;
3923 		set_bit(BTUSB_BOOTLOADER, &data->flags);
3924 	} else {
3925 		data->recv_event = hci_recv_frame;
3926 		data->recv_bulk = btusb_recv_bulk;
3927 	}
3928 
3929 	hdev = hci_alloc_dev();
3930 	if (!hdev)
3931 		return -ENOMEM;
3932 
3933 	hdev->bus = HCI_USB;
3934 	hci_set_drvdata(hdev, data);
3935 
3936 	if (id->driver_info & BTUSB_AMP)
3937 		hdev->dev_type = HCI_AMP;
3938 	else
3939 		hdev->dev_type = HCI_PRIMARY;
3940 
3941 	data->hdev = hdev;
3942 
3943 	SET_HCIDEV_DEV(hdev, &intf->dev);
3944 
3945 	reset_gpio = gpiod_get_optional(&data->udev->dev, "reset",
3946 					GPIOD_OUT_LOW);
3947 	if (IS_ERR(reset_gpio)) {
3948 		err = PTR_ERR(reset_gpio);
3949 		goto out_free_dev;
3950 	} else if (reset_gpio) {
3951 		data->reset_gpio = reset_gpio;
3952 	}
3953 
3954 	hdev->open   = btusb_open;
3955 	hdev->close  = btusb_close;
3956 	hdev->flush  = btusb_flush;
3957 	hdev->send   = btusb_send_frame;
3958 	hdev->notify = btusb_notify;
3959 	hdev->prevent_wake = btusb_prevent_wake;
3960 
3961 #ifdef CONFIG_PM
3962 	err = btusb_config_oob_wake(hdev);
3963 	if (err)
3964 		goto out_free_dev;
3965 
3966 	/* Marvell devices may need a specific chip configuration */
3967 	if (id->driver_info & BTUSB_MARVELL && data->oob_wake_irq) {
3968 		err = marvell_config_oob_wake(hdev);
3969 		if (err)
3970 			goto out_free_dev;
3971 	}
3972 #endif
3973 	if (id->driver_info & BTUSB_CW6622)
3974 		set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
3975 
3976 	if (id->driver_info & BTUSB_BCM2045)
3977 		set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
3978 
3979 	if (id->driver_info & BTUSB_BCM92035)
3980 		hdev->setup = btusb_setup_bcm92035;
3981 
3982 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
3983 	    (id->driver_info & BTUSB_BCM_PATCHRAM)) {
3984 		hdev->manufacturer = 15;
3985 		hdev->setup = btbcm_setup_patchram;
3986 		hdev->set_diag = btusb_bcm_set_diag;
3987 		hdev->set_bdaddr = btbcm_set_bdaddr;
3988 
3989 		/* Broadcom LM_DIAG Interface numbers are hardcoded */
3990 		data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
3991 	}
3992 
3993 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
3994 	    (id->driver_info & BTUSB_BCM_APPLE)) {
3995 		hdev->manufacturer = 15;
3996 		hdev->setup = btbcm_setup_apple;
3997 		hdev->set_diag = btusb_bcm_set_diag;
3998 
3999 		/* Broadcom LM_DIAG Interface numbers are hardcoded */
4000 		data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
4001 	}
4002 
4003 	if (id->driver_info & BTUSB_INTEL) {
4004 		hdev->manufacturer = 2;
4005 		hdev->setup = btusb_setup_intel;
4006 		hdev->shutdown = btusb_shutdown_intel;
4007 		hdev->set_diag = btintel_set_diag_mfg;
4008 		hdev->set_bdaddr = btintel_set_bdaddr;
4009 		hdev->cmd_timeout = btusb_intel_cmd_timeout;
4010 		set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
4011 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4012 		set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
4013 	}
4014 
4015 	if (id->driver_info & BTUSB_INTEL_NEW) {
4016 		hdev->manufacturer = 2;
4017 		hdev->send = btusb_send_frame_intel;
4018 		hdev->setup = btusb_setup_intel_new;
4019 		hdev->shutdown = btusb_shutdown_intel_new;
4020 		hdev->hw_error = btintel_hw_error;
4021 		hdev->set_diag = btintel_set_diag;
4022 		hdev->set_bdaddr = btintel_set_bdaddr;
4023 		hdev->cmd_timeout = btusb_intel_cmd_timeout;
4024 		set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
4025 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4026 		set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
4027 	}
4028 
4029 	if (id->driver_info & BTUSB_MARVELL)
4030 		hdev->set_bdaddr = btusb_set_bdaddr_marvell;
4031 
4032 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK) &&
4033 	    (id->driver_info & BTUSB_MEDIATEK)) {
4034 		hdev->setup = btusb_mtk_setup;
4035 		hdev->shutdown = btusb_mtk_shutdown;
4036 		hdev->manufacturer = 70;
4037 		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
4038 	}
4039 
4040 	if (id->driver_info & BTUSB_SWAVE) {
4041 		set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
4042 		set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
4043 	}
4044 
4045 	if (id->driver_info & BTUSB_INTEL_BOOT) {
4046 		hdev->manufacturer = 2;
4047 		set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
4048 	}
4049 
4050 	if (id->driver_info & BTUSB_ATH3012) {
4051 		data->setup_on_usb = btusb_setup_qca;
4052 		hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
4053 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4054 		set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
4055 	}
4056 
4057 	if (id->driver_info & BTUSB_QCA_ROME) {
4058 		data->setup_on_usb = btusb_setup_qca;
4059 		hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
4060 		hdev->cmd_timeout = btusb_qca_cmd_timeout;
4061 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4062 		btusb_check_needs_reset_resume(intf);
4063 	}
4064 
4065 	if (id->driver_info & BTUSB_AMP) {
4066 		/* AMP controllers do not support SCO packets */
4067 		data->isoc = NULL;
4068 	} else {
4069 		/* Interface orders are hardcoded in the specification */
4070 		data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
4071 		data->isoc_ifnum = ifnum_base + 1;
4072 	}
4073 
4074 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
4075 	    (id->driver_info & BTUSB_REALTEK)) {
4076 		hdev->setup = btrtl_setup_realtek;
4077 		hdev->shutdown = btrtl_shutdown_realtek;
4078 		hdev->cmd_timeout = btusb_rtl_cmd_timeout;
4079 
4080 		/* Realtek devices lose their updated firmware over global
4081 		 * suspend that means host doesn't send SET_FEATURE
4082 		 * (DEVICE_REMOTE_WAKEUP)
4083 		 */
4084 		set_bit(BTUSB_WAKEUP_DISABLE, &data->flags);
4085 		if (btusb_find_altsetting(data, 1))
4086 			set_bit(BTUSB_USE_ALT1_FOR_WBS, &data->flags);
4087 		else
4088 			bt_dev_err(hdev, "Device does not support ALT setting 1");
4089 	}
4090 
4091 	if (!reset)
4092 		set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
4093 
4094 	if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
4095 		if (!disable_scofix)
4096 			set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
4097 	}
4098 
4099 	if (id->driver_info & BTUSB_BROKEN_ISOC)
4100 		data->isoc = NULL;
4101 
4102 	if (id->driver_info & BTUSB_WIDEBAND_SPEECH)
4103 		set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
4104 
4105 	if (id->driver_info & BTUSB_VALID_LE_STATES)
4106 		set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
4107 
4108 	if (id->driver_info & BTUSB_DIGIANSWER) {
4109 		data->cmdreq_type = USB_TYPE_VENDOR;
4110 		set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
4111 	}
4112 
4113 	if (id->driver_info & BTUSB_CSR) {
4114 		struct usb_device *udev = data->udev;
4115 		u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
4116 
4117 		/* Old firmware would otherwise execute USB reset */
4118 		if (bcdDevice < 0x117)
4119 			set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
4120 
4121 		/* This must be set first in case we disable it for fakes */
4122 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4123 
4124 		/* Fake CSR devices with broken commands */
4125 		if (le16_to_cpu(udev->descriptor.idVendor)  == 0x0a12 &&
4126 		    le16_to_cpu(udev->descriptor.idProduct) == 0x0001)
4127 			hdev->setup = btusb_setup_csr;
4128 	}
4129 
4130 	if (id->driver_info & BTUSB_SNIFFER) {
4131 		struct usb_device *udev = data->udev;
4132 
4133 		/* New sniffer firmware has crippled HCI interface */
4134 		if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
4135 			set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
4136 	}
4137 
4138 	if (id->driver_info & BTUSB_INTEL_BOOT) {
4139 		/* A bug in the bootloader causes that interrupt interface is
4140 		 * only enabled after receiving SetInterface(0, AltSetting=0).
4141 		 */
4142 		err = usb_set_interface(data->udev, 0, 0);
4143 		if (err < 0) {
4144 			BT_ERR("failed to set interface 0, alt 0 %d", err);
4145 			goto out_free_dev;
4146 		}
4147 	}
4148 
4149 	if (data->isoc) {
4150 		err = usb_driver_claim_interface(&btusb_driver,
4151 						 data->isoc, data);
4152 		if (err < 0)
4153 			goto out_free_dev;
4154 	}
4155 
4156 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) && data->diag) {
4157 		if (!usb_driver_claim_interface(&btusb_driver,
4158 						data->diag, data))
4159 			__set_diag_interface(hdev);
4160 		else
4161 			data->diag = NULL;
4162 	}
4163 
4164 	if (enable_autosuspend)
4165 		usb_enable_autosuspend(data->udev);
4166 
4167 	err = hci_register_dev(hdev);
4168 	if (err < 0)
4169 		goto out_free_dev;
4170 
4171 	usb_set_intfdata(intf, data);
4172 
4173 	return 0;
4174 
4175 out_free_dev:
4176 	if (data->reset_gpio)
4177 		gpiod_put(data->reset_gpio);
4178 	hci_free_dev(hdev);
4179 	return err;
4180 }
4181 
4182 static void btusb_disconnect(struct usb_interface *intf)
4183 {
4184 	struct btusb_data *data = usb_get_intfdata(intf);
4185 	struct hci_dev *hdev;
4186 
4187 	BT_DBG("intf %p", intf);
4188 
4189 	if (!data)
4190 		return;
4191 
4192 	hdev = data->hdev;
4193 	usb_set_intfdata(data->intf, NULL);
4194 
4195 	if (data->isoc)
4196 		usb_set_intfdata(data->isoc, NULL);
4197 
4198 	if (data->diag)
4199 		usb_set_intfdata(data->diag, NULL);
4200 
4201 	hci_unregister_dev(hdev);
4202 
4203 	if (intf == data->intf) {
4204 		if (data->isoc)
4205 			usb_driver_release_interface(&btusb_driver, data->isoc);
4206 		if (data->diag)
4207 			usb_driver_release_interface(&btusb_driver, data->diag);
4208 	} else if (intf == data->isoc) {
4209 		if (data->diag)
4210 			usb_driver_release_interface(&btusb_driver, data->diag);
4211 		usb_driver_release_interface(&btusb_driver, data->intf);
4212 	} else if (intf == data->diag) {
4213 		usb_driver_release_interface(&btusb_driver, data->intf);
4214 		if (data->isoc)
4215 			usb_driver_release_interface(&btusb_driver, data->isoc);
4216 	}
4217 
4218 	if (data->oob_wake_irq)
4219 		device_init_wakeup(&data->udev->dev, false);
4220 
4221 	if (data->reset_gpio)
4222 		gpiod_put(data->reset_gpio);
4223 
4224 	hci_free_dev(hdev);
4225 }
4226 
4227 #ifdef CONFIG_PM
4228 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
4229 {
4230 	struct btusb_data *data = usb_get_intfdata(intf);
4231 
4232 	BT_DBG("intf %p", intf);
4233 
4234 	if (data->suspend_count++)
4235 		return 0;
4236 
4237 	spin_lock_irq(&data->txlock);
4238 	if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
4239 		set_bit(BTUSB_SUSPENDING, &data->flags);
4240 		spin_unlock_irq(&data->txlock);
4241 	} else {
4242 		spin_unlock_irq(&data->txlock);
4243 		data->suspend_count--;
4244 		return -EBUSY;
4245 	}
4246 
4247 	cancel_work_sync(&data->work);
4248 
4249 	btusb_stop_traffic(data);
4250 	usb_kill_anchored_urbs(&data->tx_anchor);
4251 
4252 	if (data->oob_wake_irq && device_may_wakeup(&data->udev->dev)) {
4253 		set_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
4254 		enable_irq_wake(data->oob_wake_irq);
4255 		enable_irq(data->oob_wake_irq);
4256 	}
4257 
4258 	/* For global suspend, Realtek devices lose the loaded fw
4259 	 * in them. But for autosuspend, firmware should remain.
4260 	 * Actually, it depends on whether the usb host sends
4261 	 * set feature (enable wakeup) or not.
4262 	 */
4263 	if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags)) {
4264 		if (PMSG_IS_AUTO(message) &&
4265 		    device_can_wakeup(&data->udev->dev))
4266 			data->udev->do_remote_wakeup = 1;
4267 		else if (!PMSG_IS_AUTO(message))
4268 			data->udev->reset_resume = 1;
4269 	}
4270 
4271 	return 0;
4272 }
4273 
4274 static void play_deferred(struct btusb_data *data)
4275 {
4276 	struct urb *urb;
4277 	int err;
4278 
4279 	while ((urb = usb_get_from_anchor(&data->deferred))) {
4280 		usb_anchor_urb(urb, &data->tx_anchor);
4281 
4282 		err = usb_submit_urb(urb, GFP_ATOMIC);
4283 		if (err < 0) {
4284 			if (err != -EPERM && err != -ENODEV)
4285 				BT_ERR("%s urb %p submission failed (%d)",
4286 				       data->hdev->name, urb, -err);
4287 			kfree(urb->setup_packet);
4288 			usb_unanchor_urb(urb);
4289 			usb_free_urb(urb);
4290 			break;
4291 		}
4292 
4293 		data->tx_in_flight++;
4294 		usb_free_urb(urb);
4295 	}
4296 
4297 	/* Cleanup the rest deferred urbs. */
4298 	while ((urb = usb_get_from_anchor(&data->deferred))) {
4299 		kfree(urb->setup_packet);
4300 		usb_free_urb(urb);
4301 	}
4302 }
4303 
4304 static int btusb_resume(struct usb_interface *intf)
4305 {
4306 	struct btusb_data *data = usb_get_intfdata(intf);
4307 	struct hci_dev *hdev = data->hdev;
4308 	int err = 0;
4309 
4310 	BT_DBG("intf %p", intf);
4311 
4312 	if (--data->suspend_count)
4313 		return 0;
4314 
4315 	/* Disable only if not already disabled (keep it balanced) */
4316 	if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
4317 		disable_irq(data->oob_wake_irq);
4318 		disable_irq_wake(data->oob_wake_irq);
4319 	}
4320 
4321 	if (!test_bit(HCI_RUNNING, &hdev->flags))
4322 		goto done;
4323 
4324 	if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
4325 		err = btusb_submit_intr_urb(hdev, GFP_NOIO);
4326 		if (err < 0) {
4327 			clear_bit(BTUSB_INTR_RUNNING, &data->flags);
4328 			goto failed;
4329 		}
4330 	}
4331 
4332 	if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
4333 		err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
4334 		if (err < 0) {
4335 			clear_bit(BTUSB_BULK_RUNNING, &data->flags);
4336 			goto failed;
4337 		}
4338 
4339 		btusb_submit_bulk_urb(hdev, GFP_NOIO);
4340 	}
4341 
4342 	if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
4343 		if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
4344 			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
4345 		else
4346 			btusb_submit_isoc_urb(hdev, GFP_NOIO);
4347 	}
4348 
4349 	spin_lock_irq(&data->txlock);
4350 	play_deferred(data);
4351 	clear_bit(BTUSB_SUSPENDING, &data->flags);
4352 	spin_unlock_irq(&data->txlock);
4353 	schedule_work(&data->work);
4354 
4355 	return 0;
4356 
4357 failed:
4358 	usb_scuttle_anchored_urbs(&data->deferred);
4359 done:
4360 	spin_lock_irq(&data->txlock);
4361 	clear_bit(BTUSB_SUSPENDING, &data->flags);
4362 	spin_unlock_irq(&data->txlock);
4363 
4364 	return err;
4365 }
4366 #endif
4367 
4368 static struct usb_driver btusb_driver = {
4369 	.name		= "btusb",
4370 	.probe		= btusb_probe,
4371 	.disconnect	= btusb_disconnect,
4372 #ifdef CONFIG_PM
4373 	.suspend	= btusb_suspend,
4374 	.resume		= btusb_resume,
4375 #endif
4376 	.id_table	= btusb_table,
4377 	.supports_autosuspend = 1,
4378 	.disable_hub_initiated_lpm = 1,
4379 };
4380 
4381 module_usb_driver(btusb_driver);
4382 
4383 module_param(disable_scofix, bool, 0644);
4384 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
4385 
4386 module_param(force_scofix, bool, 0644);
4387 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
4388 
4389 module_param(enable_autosuspend, bool, 0644);
4390 MODULE_PARM_DESC(enable_autosuspend, "Enable USB autosuspend by default");
4391 
4392 module_param(reset, bool, 0644);
4393 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
4394 
4395 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
4396 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
4397 MODULE_VERSION(VERSION);
4398 MODULE_LICENSE("GPL");
4399