xref: /openbmc/linux/drivers/bluetooth/btusb.c (revision 34e4dfe8)
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 <linux/debugfs.h>
20 #include <asm/unaligned.h>
21 
22 #include <net/bluetooth/bluetooth.h>
23 #include <net/bluetooth/hci_core.h>
24 
25 #include "btintel.h"
26 #include "btbcm.h"
27 #include "btrtl.h"
28 #include "btmtk.h"
29 
30 #define VERSION "0.8"
31 
32 static bool disable_scofix;
33 static bool force_scofix;
34 static bool enable_autosuspend = IS_ENABLED(CONFIG_BT_HCIBTUSB_AUTOSUSPEND);
35 static bool enable_poll_sync = IS_ENABLED(CONFIG_BT_HCIBTUSB_POLL_SYNC);
36 static bool reset = true;
37 
38 static struct usb_driver btusb_driver;
39 
40 #define BTUSB_IGNORE			BIT(0)
41 #define BTUSB_DIGIANSWER		BIT(1)
42 #define BTUSB_CSR			BIT(2)
43 #define BTUSB_SNIFFER			BIT(3)
44 #define BTUSB_BCM92035			BIT(4)
45 #define BTUSB_BROKEN_ISOC		BIT(5)
46 #define BTUSB_WRONG_SCO_MTU		BIT(6)
47 #define BTUSB_ATH3012			BIT(7)
48 #define BTUSB_INTEL_COMBINED		BIT(8)
49 #define BTUSB_INTEL_BOOT		BIT(9)
50 #define BTUSB_BCM_PATCHRAM		BIT(10)
51 #define BTUSB_MARVELL			BIT(11)
52 #define BTUSB_SWAVE			BIT(12)
53 #define BTUSB_AMP			BIT(13)
54 #define BTUSB_QCA_ROME			BIT(14)
55 #define BTUSB_BCM_APPLE			BIT(15)
56 #define BTUSB_REALTEK			BIT(16)
57 #define BTUSB_BCM2045			BIT(17)
58 #define BTUSB_IFNUM_2			BIT(18)
59 #define BTUSB_CW6622			BIT(19)
60 #define BTUSB_MEDIATEK			BIT(20)
61 #define BTUSB_WIDEBAND_SPEECH		BIT(21)
62 #define BTUSB_VALID_LE_STATES		BIT(22)
63 #define BTUSB_QCA_WCN6855		BIT(23)
64 #define BTUSB_INTEL_BROKEN_SHUTDOWN_LED	BIT(24)
65 #define BTUSB_INTEL_BROKEN_INITIAL_NCMD BIT(25)
66 #define BTUSB_INTEL_NO_WBS_SUPPORT	BIT(26)
67 #define BTUSB_ACTIONS_SEMI		BIT(27)
68 
69 static const struct usb_device_id btusb_table[] = {
70 	/* Generic Bluetooth USB device */
71 	{ USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
72 
73 	/* Generic Bluetooth AMP device */
74 	{ USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
75 
76 	/* Generic Bluetooth USB interface */
77 	{ USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },
78 
79 	/* Apple-specific (Broadcom) devices */
80 	{ USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
81 	  .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },
82 
83 	/* MediaTek MT76x0E */
84 	{ USB_DEVICE(0x0e8d, 0x763f) },
85 
86 	/* Broadcom SoftSailing reporting vendor specific */
87 	{ USB_DEVICE(0x0a5c, 0x21e1) },
88 
89 	/* Apple MacBookPro 7,1 */
90 	{ USB_DEVICE(0x05ac, 0x8213) },
91 
92 	/* Apple iMac11,1 */
93 	{ USB_DEVICE(0x05ac, 0x8215) },
94 
95 	/* Apple MacBookPro6,2 */
96 	{ USB_DEVICE(0x05ac, 0x8218) },
97 
98 	/* Apple MacBookAir3,1, MacBookAir3,2 */
99 	{ USB_DEVICE(0x05ac, 0x821b) },
100 
101 	/* Apple MacBookAir4,1 */
102 	{ USB_DEVICE(0x05ac, 0x821f) },
103 
104 	/* Apple MacBookPro8,2 */
105 	{ USB_DEVICE(0x05ac, 0x821a) },
106 
107 	/* Apple MacMini5,1 */
108 	{ USB_DEVICE(0x05ac, 0x8281) },
109 
110 	/* AVM BlueFRITZ! USB v2.0 */
111 	{ USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },
112 
113 	/* Bluetooth Ultraport Module from IBM */
114 	{ USB_DEVICE(0x04bf, 0x030a) },
115 
116 	/* ALPS Modules with non-standard id */
117 	{ USB_DEVICE(0x044e, 0x3001) },
118 	{ USB_DEVICE(0x044e, 0x3002) },
119 
120 	/* Ericsson with non-standard id */
121 	{ USB_DEVICE(0x0bdb, 0x1002) },
122 
123 	/* Canyon CN-BTU1 with HID interfaces */
124 	{ USB_DEVICE(0x0c10, 0x0000) },
125 
126 	/* Broadcom BCM20702B0 (Dynex/Insignia) */
127 	{ USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
128 
129 	/* Broadcom BCM43142A0 (Foxconn/Lenovo) */
130 	{ USB_VENDOR_AND_INTERFACE_INFO(0x105b, 0xff, 0x01, 0x01),
131 	  .driver_info = BTUSB_BCM_PATCHRAM },
132 
133 	/* Broadcom BCM920703 (HTC Vive) */
134 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0bb4, 0xff, 0x01, 0x01),
135 	  .driver_info = BTUSB_BCM_PATCHRAM },
136 
137 	/* Foxconn - Hon Hai */
138 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
139 	  .driver_info = BTUSB_BCM_PATCHRAM },
140 
141 	/* Lite-On Technology - Broadcom based */
142 	{ USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
143 	  .driver_info = BTUSB_BCM_PATCHRAM },
144 
145 	/* Broadcom devices with vendor specific id */
146 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
147 	  .driver_info = BTUSB_BCM_PATCHRAM },
148 
149 	/* ASUSTek Computer - Broadcom based */
150 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
151 	  .driver_info = BTUSB_BCM_PATCHRAM },
152 
153 	/* Belkin F8065bf - Broadcom based */
154 	{ USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
155 	  .driver_info = BTUSB_BCM_PATCHRAM },
156 
157 	/* IMC Networks - Broadcom based */
158 	{ USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
159 	  .driver_info = BTUSB_BCM_PATCHRAM },
160 
161 	/* Dell Computer - Broadcom based  */
162 	{ USB_VENDOR_AND_INTERFACE_INFO(0x413c, 0xff, 0x01, 0x01),
163 	  .driver_info = BTUSB_BCM_PATCHRAM },
164 
165 	/* Toshiba Corp - Broadcom based */
166 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
167 	  .driver_info = BTUSB_BCM_PATCHRAM },
168 
169 	/* Intel Bluetooth USB Bootloader (RAM module) */
170 	{ USB_DEVICE(0x8087, 0x0a5a),
171 	  .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
172 
173 	{ }	/* Terminating entry */
174 };
175 
176 MODULE_DEVICE_TABLE(usb, btusb_table);
177 
178 static const struct usb_device_id quirks_table[] = {
179 	/* CSR BlueCore devices */
180 	{ USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
181 
182 	/* Broadcom BCM2033 without firmware */
183 	{ USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
184 
185 	/* Broadcom BCM2045 devices */
186 	{ USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },
187 
188 	/* Atheros 3011 with sflash firmware */
189 	{ USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
190 	{ USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
191 	{ USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
192 	{ USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
193 	{ USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
194 	{ USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
195 	{ USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
196 
197 	/* Atheros AR9285 Malbec with sflash firmware */
198 	{ USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
199 
200 	/* Atheros 3012 with sflash firmware */
201 	{ USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
202 	{ USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
203 	{ USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
204 	{ USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
205 	{ USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
206 	{ USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
207 	{ USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
208 	{ USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
209 	{ USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
210 	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
211 	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
212 	{ USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
213 	{ USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
214 	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
215 	{ USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
216 	{ USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
217 	{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
218 	{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
219 	{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
220 	{ USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
221 	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
222 	{ USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
223 	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
224 	{ USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
225 	{ USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
226 	{ USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
227 	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
228 	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
229 	{ USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
230 	{ USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
231 	{ USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
232 	{ USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
233 	{ USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
234 	{ USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
235 	{ USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
236 	{ USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
237 	{ USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
238 	{ USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
239 	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
240 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
241 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
242 	{ USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
243 	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
244 	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
245 	{ USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
246 	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
247 	{ USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
248 	{ USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
249 	{ USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
250 	{ USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
251 
252 	/* Atheros AR5BBU12 with sflash firmware */
253 	{ USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
254 
255 	/* Atheros AR5BBU12 with sflash firmware */
256 	{ USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
257 	{ USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
258 
259 	/* QCA ROME chipset */
260 	{ USB_DEVICE(0x0cf3, 0x535b), .driver_info = BTUSB_QCA_ROME |
261 						     BTUSB_WIDEBAND_SPEECH },
262 	{ USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME |
263 						     BTUSB_WIDEBAND_SPEECH },
264 	{ USB_DEVICE(0x0cf3, 0xe009), .driver_info = BTUSB_QCA_ROME |
265 						     BTUSB_WIDEBAND_SPEECH },
266 	{ USB_DEVICE(0x0cf3, 0xe010), .driver_info = BTUSB_QCA_ROME |
267 						     BTUSB_WIDEBAND_SPEECH },
268 	{ USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME |
269 						     BTUSB_WIDEBAND_SPEECH },
270 	{ USB_DEVICE(0x0cf3, 0xe301), .driver_info = BTUSB_QCA_ROME |
271 						     BTUSB_WIDEBAND_SPEECH },
272 	{ USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME |
273 						     BTUSB_WIDEBAND_SPEECH },
274 	{ USB_DEVICE(0x0cf3, 0xe500), .driver_info = BTUSB_QCA_ROME |
275 						     BTUSB_WIDEBAND_SPEECH },
276 	{ USB_DEVICE(0x0489, 0xe092), .driver_info = BTUSB_QCA_ROME |
277 						     BTUSB_WIDEBAND_SPEECH },
278 	{ USB_DEVICE(0x0489, 0xe09f), .driver_info = BTUSB_QCA_ROME |
279 						     BTUSB_WIDEBAND_SPEECH },
280 	{ USB_DEVICE(0x0489, 0xe0a2), .driver_info = BTUSB_QCA_ROME |
281 						     BTUSB_WIDEBAND_SPEECH },
282 	{ USB_DEVICE(0x04ca, 0x3011), .driver_info = BTUSB_QCA_ROME |
283 						     BTUSB_WIDEBAND_SPEECH },
284 	{ USB_DEVICE(0x04ca, 0x3015), .driver_info = BTUSB_QCA_ROME |
285 						     BTUSB_WIDEBAND_SPEECH },
286 	{ USB_DEVICE(0x04ca, 0x3016), .driver_info = BTUSB_QCA_ROME |
287 						     BTUSB_WIDEBAND_SPEECH },
288 	{ USB_DEVICE(0x04ca, 0x301a), .driver_info = BTUSB_QCA_ROME |
289 						     BTUSB_WIDEBAND_SPEECH },
290 	{ USB_DEVICE(0x04ca, 0x3021), .driver_info = BTUSB_QCA_ROME |
291 						     BTUSB_WIDEBAND_SPEECH },
292 	{ USB_DEVICE(0x13d3, 0x3491), .driver_info = BTUSB_QCA_ROME |
293 						     BTUSB_WIDEBAND_SPEECH },
294 	{ USB_DEVICE(0x13d3, 0x3496), .driver_info = BTUSB_QCA_ROME |
295 						     BTUSB_WIDEBAND_SPEECH },
296 	{ USB_DEVICE(0x13d3, 0x3501), .driver_info = BTUSB_QCA_ROME |
297 						     BTUSB_WIDEBAND_SPEECH },
298 
299 	/* QCA WCN6855 chipset */
300 	{ USB_DEVICE(0x0cf3, 0xe600), .driver_info = BTUSB_QCA_WCN6855 |
301 						     BTUSB_WIDEBAND_SPEECH |
302 						     BTUSB_VALID_LE_STATES },
303 	{ USB_DEVICE(0x0489, 0xe0cc), .driver_info = BTUSB_QCA_WCN6855 |
304 						     BTUSB_WIDEBAND_SPEECH |
305 						     BTUSB_VALID_LE_STATES },
306 	{ USB_DEVICE(0x0489, 0xe0d6), .driver_info = BTUSB_QCA_WCN6855 |
307 						     BTUSB_WIDEBAND_SPEECH |
308 						     BTUSB_VALID_LE_STATES },
309 	{ USB_DEVICE(0x0489, 0xe0e3), .driver_info = BTUSB_QCA_WCN6855 |
310 						     BTUSB_WIDEBAND_SPEECH |
311 						     BTUSB_VALID_LE_STATES },
312 	{ USB_DEVICE(0x10ab, 0x9309), .driver_info = BTUSB_QCA_WCN6855 |
313 						     BTUSB_WIDEBAND_SPEECH |
314 						     BTUSB_VALID_LE_STATES },
315 	{ USB_DEVICE(0x10ab, 0x9409), .driver_info = BTUSB_QCA_WCN6855 |
316 						     BTUSB_WIDEBAND_SPEECH |
317 						     BTUSB_VALID_LE_STATES },
318 	{ USB_DEVICE(0x0489, 0xe0d0), .driver_info = BTUSB_QCA_WCN6855 |
319 						     BTUSB_WIDEBAND_SPEECH |
320 						     BTUSB_VALID_LE_STATES },
321 	{ USB_DEVICE(0x10ab, 0x9108), .driver_info = BTUSB_QCA_WCN6855 |
322 						     BTUSB_WIDEBAND_SPEECH |
323 						     BTUSB_VALID_LE_STATES },
324 	{ USB_DEVICE(0x10ab, 0x9109), .driver_info = BTUSB_QCA_WCN6855 |
325 						     BTUSB_WIDEBAND_SPEECH |
326 						     BTUSB_VALID_LE_STATES },
327 	{ USB_DEVICE(0x10ab, 0x9208), .driver_info = BTUSB_QCA_WCN6855 |
328 						     BTUSB_WIDEBAND_SPEECH |
329 						     BTUSB_VALID_LE_STATES },
330 	{ USB_DEVICE(0x10ab, 0x9209), .driver_info = BTUSB_QCA_WCN6855 |
331 						     BTUSB_WIDEBAND_SPEECH |
332 						     BTUSB_VALID_LE_STATES },
333 	{ USB_DEVICE(0x10ab, 0x9308), .driver_info = BTUSB_QCA_WCN6855 |
334 						     BTUSB_WIDEBAND_SPEECH |
335 						     BTUSB_VALID_LE_STATES },
336 	{ USB_DEVICE(0x10ab, 0x9408), .driver_info = BTUSB_QCA_WCN6855 |
337 						     BTUSB_WIDEBAND_SPEECH |
338 						     BTUSB_VALID_LE_STATES },
339 	{ USB_DEVICE(0x10ab, 0x9508), .driver_info = BTUSB_QCA_WCN6855 |
340 						     BTUSB_WIDEBAND_SPEECH |
341 						     BTUSB_VALID_LE_STATES },
342 	{ USB_DEVICE(0x10ab, 0x9509), .driver_info = BTUSB_QCA_WCN6855 |
343 						     BTUSB_WIDEBAND_SPEECH |
344 						     BTUSB_VALID_LE_STATES },
345 	{ USB_DEVICE(0x10ab, 0x9608), .driver_info = BTUSB_QCA_WCN6855 |
346 						     BTUSB_WIDEBAND_SPEECH |
347 						     BTUSB_VALID_LE_STATES },
348 	{ USB_DEVICE(0x10ab, 0x9609), .driver_info = BTUSB_QCA_WCN6855 |
349 						     BTUSB_WIDEBAND_SPEECH |
350 						     BTUSB_VALID_LE_STATES },
351 	{ USB_DEVICE(0x10ab, 0x9f09), .driver_info = BTUSB_QCA_WCN6855 |
352 						     BTUSB_WIDEBAND_SPEECH |
353 						     BTUSB_VALID_LE_STATES },
354 	{ USB_DEVICE(0x04ca, 0x3022), .driver_info = BTUSB_QCA_WCN6855 |
355 						     BTUSB_WIDEBAND_SPEECH |
356 						     BTUSB_VALID_LE_STATES },
357 	{ USB_DEVICE(0x0489, 0xe0c7), .driver_info = BTUSB_QCA_WCN6855 |
358 						     BTUSB_WIDEBAND_SPEECH |
359 						     BTUSB_VALID_LE_STATES },
360 	{ USB_DEVICE(0x0489, 0xe0c9), .driver_info = BTUSB_QCA_WCN6855 |
361 						     BTUSB_WIDEBAND_SPEECH |
362 						     BTUSB_VALID_LE_STATES },
363 	{ USB_DEVICE(0x0489, 0xe0ca), .driver_info = BTUSB_QCA_WCN6855 |
364 						     BTUSB_WIDEBAND_SPEECH |
365 						     BTUSB_VALID_LE_STATES },
366 	{ USB_DEVICE(0x0489, 0xe0cb), .driver_info = BTUSB_QCA_WCN6855 |
367 						     BTUSB_WIDEBAND_SPEECH |
368 						     BTUSB_VALID_LE_STATES },
369 	{ USB_DEVICE(0x0489, 0xe0ce), .driver_info = BTUSB_QCA_WCN6855 |
370 						     BTUSB_WIDEBAND_SPEECH |
371 						     BTUSB_VALID_LE_STATES },
372 	{ USB_DEVICE(0x0489, 0xe0de), .driver_info = BTUSB_QCA_WCN6855 |
373 						     BTUSB_WIDEBAND_SPEECH |
374 						     BTUSB_VALID_LE_STATES },
375 	{ USB_DEVICE(0x0489, 0xe0df), .driver_info = BTUSB_QCA_WCN6855 |
376 						     BTUSB_WIDEBAND_SPEECH |
377 						     BTUSB_VALID_LE_STATES },
378 	{ USB_DEVICE(0x0489, 0xe0e1), .driver_info = BTUSB_QCA_WCN6855 |
379 						     BTUSB_WIDEBAND_SPEECH |
380 						     BTUSB_VALID_LE_STATES },
381 	{ USB_DEVICE(0x0489, 0xe0ea), .driver_info = BTUSB_QCA_WCN6855 |
382 						     BTUSB_WIDEBAND_SPEECH |
383 						     BTUSB_VALID_LE_STATES },
384 	{ USB_DEVICE(0x0489, 0xe0ec), .driver_info = BTUSB_QCA_WCN6855 |
385 						     BTUSB_WIDEBAND_SPEECH |
386 						     BTUSB_VALID_LE_STATES },
387 	{ USB_DEVICE(0x04ca, 0x3023), .driver_info = BTUSB_QCA_WCN6855 |
388 						     BTUSB_WIDEBAND_SPEECH |
389 						     BTUSB_VALID_LE_STATES },
390 	{ USB_DEVICE(0x04ca, 0x3024), .driver_info = BTUSB_QCA_WCN6855 |
391 						     BTUSB_WIDEBAND_SPEECH |
392 						     BTUSB_VALID_LE_STATES },
393 	{ USB_DEVICE(0x04ca, 0x3a22), .driver_info = BTUSB_QCA_WCN6855 |
394 						     BTUSB_WIDEBAND_SPEECH |
395 						     BTUSB_VALID_LE_STATES },
396 	{ USB_DEVICE(0x04ca, 0x3a24), .driver_info = BTUSB_QCA_WCN6855 |
397 						     BTUSB_WIDEBAND_SPEECH |
398 						     BTUSB_VALID_LE_STATES },
399 	{ USB_DEVICE(0x04ca, 0x3a26), .driver_info = BTUSB_QCA_WCN6855 |
400 						     BTUSB_WIDEBAND_SPEECH |
401 						     BTUSB_VALID_LE_STATES },
402 	{ USB_DEVICE(0x04ca, 0x3a27), .driver_info = BTUSB_QCA_WCN6855 |
403 						     BTUSB_WIDEBAND_SPEECH |
404 						     BTUSB_VALID_LE_STATES },
405 
406 	/* QCA WCN785x chipset */
407 	{ USB_DEVICE(0x0cf3, 0xe700), .driver_info = BTUSB_QCA_WCN6855 |
408 						     BTUSB_WIDEBAND_SPEECH |
409 						     BTUSB_VALID_LE_STATES },
410 
411 	/* Broadcom BCM2035 */
412 	{ USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
413 	{ USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
414 	{ USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
415 
416 	/* Broadcom BCM2045 */
417 	{ USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
418 	{ USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
419 
420 	/* IBM/Lenovo ThinkPad with Broadcom chip */
421 	{ USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
422 	{ USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
423 
424 	/* HP laptop with Broadcom chip */
425 	{ USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
426 
427 	/* Dell laptop with Broadcom chip */
428 	{ USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
429 
430 	/* Dell Wireless 370 and 410 devices */
431 	{ USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
432 	{ USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
433 
434 	/* Belkin F8T012 and F8T013 devices */
435 	{ USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
436 	{ USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
437 
438 	/* Asus WL-BTD202 device */
439 	{ USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
440 
441 	/* Kensington Bluetooth USB adapter */
442 	{ USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
443 
444 	/* RTX Telecom based adapters with buggy SCO support */
445 	{ USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
446 	{ USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
447 
448 	/* CONWISE Technology based adapters with buggy SCO support */
449 	{ USB_DEVICE(0x0e5e, 0x6622),
450 	  .driver_info = BTUSB_BROKEN_ISOC | BTUSB_CW6622},
451 
452 	/* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
453 	{ USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
454 
455 	/* Digianswer devices */
456 	{ USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
457 	{ USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
458 
459 	/* CSR BlueCore Bluetooth Sniffer */
460 	{ USB_DEVICE(0x0a12, 0x0002),
461 	  .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
462 
463 	/* Frontline ComProbe Bluetooth Sniffer */
464 	{ USB_DEVICE(0x16d3, 0x0002),
465 	  .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
466 
467 	/* Marvell Bluetooth devices */
468 	{ USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
469 	{ USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
470 	{ USB_DEVICE(0x1286, 0x204e), .driver_info = BTUSB_MARVELL },
471 
472 	/* Intel Bluetooth devices */
473 	{ USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_COMBINED },
474 	{ USB_DEVICE(0x8087, 0x0026), .driver_info = BTUSB_INTEL_COMBINED },
475 	{ USB_DEVICE(0x8087, 0x0029), .driver_info = BTUSB_INTEL_COMBINED },
476 	{ USB_DEVICE(0x8087, 0x0032), .driver_info = BTUSB_INTEL_COMBINED },
477 	{ USB_DEVICE(0x8087, 0x0033), .driver_info = BTUSB_INTEL_COMBINED },
478 	{ USB_DEVICE(0x8087, 0x0035), .driver_info = BTUSB_INTEL_COMBINED },
479 	{ USB_DEVICE(0x8087, 0x0036), .driver_info = BTUSB_INTEL_COMBINED },
480 	{ USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
481 	{ USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL_COMBINED |
482 						     BTUSB_INTEL_NO_WBS_SUPPORT |
483 						     BTUSB_INTEL_BROKEN_INITIAL_NCMD |
484 						     BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
485 	{ USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL_COMBINED |
486 						     BTUSB_INTEL_NO_WBS_SUPPORT |
487 						     BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
488 	{ USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_COMBINED },
489 	{ USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL_COMBINED |
490 						     BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
491 	{ USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_COMBINED },
492 
493 	/* Other Intel Bluetooth devices */
494 	{ USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
495 	  .driver_info = BTUSB_IGNORE },
496 
497 	/* Realtek 8821CE Bluetooth devices */
498 	{ USB_DEVICE(0x13d3, 0x3529), .driver_info = BTUSB_REALTEK |
499 						     BTUSB_WIDEBAND_SPEECH },
500 
501 	/* Realtek 8822CE Bluetooth devices */
502 	{ USB_DEVICE(0x0bda, 0xb00c), .driver_info = BTUSB_REALTEK |
503 						     BTUSB_WIDEBAND_SPEECH },
504 	{ USB_DEVICE(0x0bda, 0xc822), .driver_info = BTUSB_REALTEK |
505 						     BTUSB_WIDEBAND_SPEECH },
506 
507 	/* Realtek 8822CU Bluetooth devices */
508 	{ USB_DEVICE(0x13d3, 0x3549), .driver_info = BTUSB_REALTEK |
509 						     BTUSB_WIDEBAND_SPEECH },
510 
511 	/* Realtek 8852AE Bluetooth devices */
512 	{ USB_DEVICE(0x0bda, 0x2852), .driver_info = BTUSB_REALTEK |
513 						     BTUSB_WIDEBAND_SPEECH },
514 	{ USB_DEVICE(0x0bda, 0xc852), .driver_info = BTUSB_REALTEK |
515 						     BTUSB_WIDEBAND_SPEECH },
516 	{ USB_DEVICE(0x0bda, 0x385a), .driver_info = BTUSB_REALTEK |
517 						     BTUSB_WIDEBAND_SPEECH },
518 	{ USB_DEVICE(0x0bda, 0x4852), .driver_info = BTUSB_REALTEK |
519 						     BTUSB_WIDEBAND_SPEECH },
520 	{ USB_DEVICE(0x04c5, 0x165c), .driver_info = BTUSB_REALTEK |
521 						     BTUSB_WIDEBAND_SPEECH },
522 	{ USB_DEVICE(0x04ca, 0x4006), .driver_info = BTUSB_REALTEK |
523 						     BTUSB_WIDEBAND_SPEECH },
524 	{ USB_DEVICE(0x0cb8, 0xc549), .driver_info = BTUSB_REALTEK |
525 						     BTUSB_WIDEBAND_SPEECH },
526 
527 	/* Realtek 8852CE Bluetooth devices */
528 	{ USB_DEVICE(0x04ca, 0x4007), .driver_info = BTUSB_REALTEK |
529 						     BTUSB_WIDEBAND_SPEECH },
530 	{ USB_DEVICE(0x04c5, 0x1675), .driver_info = BTUSB_REALTEK |
531 						     BTUSB_WIDEBAND_SPEECH },
532 	{ USB_DEVICE(0x0cb8, 0xc558), .driver_info = BTUSB_REALTEK |
533 						     BTUSB_WIDEBAND_SPEECH },
534 	{ USB_DEVICE(0x13d3, 0x3587), .driver_info = BTUSB_REALTEK |
535 						     BTUSB_WIDEBAND_SPEECH },
536 	{ USB_DEVICE(0x13d3, 0x3586), .driver_info = BTUSB_REALTEK |
537 						     BTUSB_WIDEBAND_SPEECH },
538 	{ USB_DEVICE(0x13d3, 0x3592), .driver_info = BTUSB_REALTEK |
539 						     BTUSB_WIDEBAND_SPEECH },
540 
541 	/* Realtek 8852BE Bluetooth devices */
542 	{ USB_DEVICE(0x0cb8, 0xc559), .driver_info = BTUSB_REALTEK |
543 						     BTUSB_WIDEBAND_SPEECH },
544 	{ USB_DEVICE(0x0bda, 0x4853), .driver_info = BTUSB_REALTEK |
545 						     BTUSB_WIDEBAND_SPEECH },
546 	{ USB_DEVICE(0x0bda, 0x887b), .driver_info = BTUSB_REALTEK |
547 						     BTUSB_WIDEBAND_SPEECH },
548 	{ USB_DEVICE(0x0bda, 0xb85b), .driver_info = BTUSB_REALTEK |
549 						     BTUSB_WIDEBAND_SPEECH },
550 	{ USB_DEVICE(0x13d3, 0x3570), .driver_info = BTUSB_REALTEK |
551 						     BTUSB_WIDEBAND_SPEECH },
552 	{ USB_DEVICE(0x13d3, 0x3571), .driver_info = BTUSB_REALTEK |
553 						     BTUSB_WIDEBAND_SPEECH },
554 	{ USB_DEVICE(0x13d3, 0x3591), .driver_info = BTUSB_REALTEK |
555 						     BTUSB_WIDEBAND_SPEECH },
556 	{ USB_DEVICE(0x0489, 0xe125), .driver_info = BTUSB_REALTEK |
557 						     BTUSB_WIDEBAND_SPEECH },
558 
559 	/* Realtek Bluetooth devices */
560 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
561 	  .driver_info = BTUSB_REALTEK },
562 
563 	/* MediaTek Bluetooth devices */
564 	{ USB_VENDOR_AND_INTERFACE_INFO(0x0e8d, 0xe0, 0x01, 0x01),
565 	  .driver_info = BTUSB_MEDIATEK |
566 			 BTUSB_WIDEBAND_SPEECH |
567 			 BTUSB_VALID_LE_STATES },
568 
569 	/* Additional MediaTek MT7615E Bluetooth devices */
570 	{ USB_DEVICE(0x13d3, 0x3560), .driver_info = BTUSB_MEDIATEK},
571 
572 	/* Additional MediaTek MT7663 Bluetooth devices */
573 	{ USB_DEVICE(0x043e, 0x310c), .driver_info = BTUSB_MEDIATEK |
574 						     BTUSB_WIDEBAND_SPEECH |
575 						     BTUSB_VALID_LE_STATES },
576 	{ USB_DEVICE(0x04ca, 0x3801), .driver_info = BTUSB_MEDIATEK |
577 						     BTUSB_WIDEBAND_SPEECH |
578 						     BTUSB_VALID_LE_STATES },
579 
580 	/* Additional MediaTek MT7668 Bluetooth devices */
581 	{ USB_DEVICE(0x043e, 0x3109), .driver_info = BTUSB_MEDIATEK |
582 						     BTUSB_WIDEBAND_SPEECH |
583 						     BTUSB_VALID_LE_STATES },
584 
585 	/* Additional MediaTek MT7921 Bluetooth devices */
586 	{ USB_DEVICE(0x0489, 0xe0c8), .driver_info = BTUSB_MEDIATEK |
587 						     BTUSB_WIDEBAND_SPEECH |
588 						     BTUSB_VALID_LE_STATES },
589 	{ USB_DEVICE(0x0489, 0xe0e0), .driver_info = BTUSB_MEDIATEK |
590 						     BTUSB_WIDEBAND_SPEECH |
591 						     BTUSB_VALID_LE_STATES },
592 	{ USB_DEVICE(0x0489, 0xe0f2), .driver_info = BTUSB_MEDIATEK |
593 						     BTUSB_WIDEBAND_SPEECH |
594 						     BTUSB_VALID_LE_STATES },
595 	{ USB_DEVICE(0x04ca, 0x3802), .driver_info = BTUSB_MEDIATEK |
596 						     BTUSB_WIDEBAND_SPEECH |
597 						     BTUSB_VALID_LE_STATES },
598 	{ USB_DEVICE(0x13d3, 0x3563), .driver_info = BTUSB_MEDIATEK |
599 						     BTUSB_WIDEBAND_SPEECH |
600 						     BTUSB_VALID_LE_STATES },
601 	{ USB_DEVICE(0x13d3, 0x3564), .driver_info = BTUSB_MEDIATEK |
602 						     BTUSB_WIDEBAND_SPEECH |
603 						     BTUSB_VALID_LE_STATES },
604 	{ USB_DEVICE(0x13d3, 0x3567), .driver_info = BTUSB_MEDIATEK |
605 						     BTUSB_WIDEBAND_SPEECH |
606 						     BTUSB_VALID_LE_STATES },
607 	{ USB_DEVICE(0x13d3, 0x3578), .driver_info = BTUSB_MEDIATEK |
608 						     BTUSB_WIDEBAND_SPEECH |
609 						     BTUSB_VALID_LE_STATES },
610 	{ USB_DEVICE(0x13d3, 0x3583), .driver_info = BTUSB_MEDIATEK |
611 						     BTUSB_WIDEBAND_SPEECH |
612 						     BTUSB_VALID_LE_STATES },
613 	{ USB_DEVICE(0x0489, 0xe0cd), .driver_info = BTUSB_MEDIATEK |
614 						     BTUSB_WIDEBAND_SPEECH |
615 						     BTUSB_VALID_LE_STATES },
616 	{ USB_DEVICE(0x0e8d, 0x0608), .driver_info = BTUSB_MEDIATEK |
617 						     BTUSB_WIDEBAND_SPEECH |
618 						     BTUSB_VALID_LE_STATES },
619 
620 	/* MediaTek MT7922A Bluetooth devices */
621 	{ USB_DEVICE(0x0489, 0xe0d8), .driver_info = BTUSB_MEDIATEK |
622 						     BTUSB_WIDEBAND_SPEECH |
623 						     BTUSB_VALID_LE_STATES },
624 	{ USB_DEVICE(0x0489, 0xe0d9), .driver_info = BTUSB_MEDIATEK |
625 						     BTUSB_WIDEBAND_SPEECH |
626 						     BTUSB_VALID_LE_STATES },
627 	{ USB_DEVICE(0x0489, 0xe0f5), .driver_info = BTUSB_MEDIATEK |
628 						     BTUSB_WIDEBAND_SPEECH |
629 						     BTUSB_VALID_LE_STATES },
630 	{ USB_DEVICE(0x13d3, 0x3568), .driver_info = BTUSB_MEDIATEK |
631 						     BTUSB_WIDEBAND_SPEECH |
632 						     BTUSB_VALID_LE_STATES },
633 	{ USB_DEVICE(0x0489, 0xe0e2), .driver_info = BTUSB_MEDIATEK |
634 						     BTUSB_WIDEBAND_SPEECH |
635 						     BTUSB_VALID_LE_STATES },
636 	{ USB_DEVICE(0x0489, 0xe0e4), .driver_info = BTUSB_MEDIATEK |
637 						     BTUSB_WIDEBAND_SPEECH |
638 						     BTUSB_VALID_LE_STATES },
639 	{ USB_DEVICE(0x0489, 0xe0f1), .driver_info = BTUSB_MEDIATEK |
640 						     BTUSB_WIDEBAND_SPEECH |
641 						     BTUSB_VALID_LE_STATES },
642 	{ USB_DEVICE(0x0489, 0xe0f2), .driver_info = BTUSB_MEDIATEK |
643 						     BTUSB_WIDEBAND_SPEECH |
644 						     BTUSB_VALID_LE_STATES },
645 	{ USB_DEVICE(0x0489, 0xe0f5), .driver_info = BTUSB_MEDIATEK |
646 						     BTUSB_WIDEBAND_SPEECH |
647 						     BTUSB_VALID_LE_STATES },
648 	{ USB_DEVICE(0x0489, 0xe0f6), .driver_info = BTUSB_MEDIATEK |
649 						     BTUSB_WIDEBAND_SPEECH |
650 						     BTUSB_VALID_LE_STATES },
651 	{ USB_DEVICE(0x0489, 0xe102), .driver_info = BTUSB_MEDIATEK |
652 						     BTUSB_WIDEBAND_SPEECH |
653 						     BTUSB_VALID_LE_STATES },
654 	{ USB_DEVICE(0x04ca, 0x3804), .driver_info = BTUSB_MEDIATEK |
655 						     BTUSB_WIDEBAND_SPEECH |
656 						     BTUSB_VALID_LE_STATES },
657 
658 	/* Additional Realtek 8723AE Bluetooth devices */
659 	{ USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
660 	{ USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
661 
662 	/* Additional Realtek 8723BE Bluetooth devices */
663 	{ USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
664 	{ USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
665 	{ USB_DEVICE(0x04f2, 0xb49f), .driver_info = BTUSB_REALTEK },
666 	{ USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
667 	{ USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
668 	{ USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
669 	{ USB_DEVICE(0x13d3, 0x3494), .driver_info = BTUSB_REALTEK },
670 
671 	/* Additional Realtek 8723BU Bluetooth devices */
672 	{ USB_DEVICE(0x7392, 0xa611), .driver_info = BTUSB_REALTEK },
673 
674 	/* Additional Realtek 8723DE Bluetooth devices */
675 	{ USB_DEVICE(0x0bda, 0xb009), .driver_info = BTUSB_REALTEK },
676 	{ USB_DEVICE(0x2ff8, 0xb011), .driver_info = BTUSB_REALTEK },
677 
678 	/* Additional Realtek 8761BUV Bluetooth devices */
679 	{ USB_DEVICE(0x2357, 0x0604), .driver_info = BTUSB_REALTEK |
680 						     BTUSB_WIDEBAND_SPEECH },
681 	{ USB_DEVICE(0x0b05, 0x190e), .driver_info = BTUSB_REALTEK |
682 	  					     BTUSB_WIDEBAND_SPEECH },
683 	{ USB_DEVICE(0x2550, 0x8761), .driver_info = BTUSB_REALTEK |
684 						     BTUSB_WIDEBAND_SPEECH },
685 	{ USB_DEVICE(0x0bda, 0x8771), .driver_info = BTUSB_REALTEK |
686 						     BTUSB_WIDEBAND_SPEECH },
687 	{ USB_DEVICE(0x6655, 0x8771), .driver_info = BTUSB_REALTEK |
688 						     BTUSB_WIDEBAND_SPEECH },
689 	{ USB_DEVICE(0x7392, 0xc611), .driver_info = BTUSB_REALTEK |
690 						     BTUSB_WIDEBAND_SPEECH },
691 	{ USB_DEVICE(0x2b89, 0x8761), .driver_info = BTUSB_REALTEK |
692 						     BTUSB_WIDEBAND_SPEECH },
693 
694 	/* Additional Realtek 8821AE Bluetooth devices */
695 	{ USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
696 	{ USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
697 	{ USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
698 	{ USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
699 	{ USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
700 
701 	/* Additional Realtek 8822BE Bluetooth devices */
702 	{ USB_DEVICE(0x13d3, 0x3526), .driver_info = BTUSB_REALTEK },
703 	{ USB_DEVICE(0x0b05, 0x185c), .driver_info = BTUSB_REALTEK },
704 
705 	/* Additional Realtek 8822CE Bluetooth devices */
706 	{ USB_DEVICE(0x04ca, 0x4005), .driver_info = BTUSB_REALTEK |
707 						     BTUSB_WIDEBAND_SPEECH },
708 	{ USB_DEVICE(0x04c5, 0x161f), .driver_info = BTUSB_REALTEK |
709 						     BTUSB_WIDEBAND_SPEECH },
710 	{ USB_DEVICE(0x0b05, 0x18ef), .driver_info = BTUSB_REALTEK |
711 						     BTUSB_WIDEBAND_SPEECH },
712 	{ USB_DEVICE(0x13d3, 0x3548), .driver_info = BTUSB_REALTEK |
713 						     BTUSB_WIDEBAND_SPEECH },
714 	{ USB_DEVICE(0x13d3, 0x3549), .driver_info = BTUSB_REALTEK |
715 						     BTUSB_WIDEBAND_SPEECH },
716 	{ USB_DEVICE(0x13d3, 0x3553), .driver_info = BTUSB_REALTEK |
717 						     BTUSB_WIDEBAND_SPEECH },
718 	{ USB_DEVICE(0x13d3, 0x3555), .driver_info = BTUSB_REALTEK |
719 						     BTUSB_WIDEBAND_SPEECH },
720 	{ USB_DEVICE(0x2ff8, 0x3051), .driver_info = BTUSB_REALTEK |
721 						     BTUSB_WIDEBAND_SPEECH },
722 	{ USB_DEVICE(0x1358, 0xc123), .driver_info = BTUSB_REALTEK |
723 						     BTUSB_WIDEBAND_SPEECH },
724 	{ USB_DEVICE(0x0bda, 0xc123), .driver_info = BTUSB_REALTEK |
725 						     BTUSB_WIDEBAND_SPEECH },
726 	{ USB_DEVICE(0x0cb5, 0xc547), .driver_info = BTUSB_REALTEK |
727 						     BTUSB_WIDEBAND_SPEECH },
728 
729 	/* Actions Semiconductor ATS2851 based devices */
730 	{ USB_DEVICE(0x10d7, 0xb012), .driver_info = BTUSB_ACTIONS_SEMI },
731 
732 	/* Silicon Wave based devices */
733 	{ USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
734 
735 	{ }	/* Terminating entry */
736 };
737 
738 /* The Bluetooth USB module build into some devices needs to be reset on resume,
739  * this is a problem with the platform (likely shutting off all power) not with
740  * the module itself. So we use a DMI list to match known broken platforms.
741  */
742 static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
743 	{
744 		/* Dell OptiPlex 3060 (QCA ROME device 0cf3:e007) */
745 		.matches = {
746 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
747 			DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 3060"),
748 		},
749 	},
750 	{
751 		/* Dell XPS 9360 (QCA ROME device 0cf3:e300) */
752 		.matches = {
753 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
754 			DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
755 		},
756 	},
757 	{
758 		/* Dell Inspiron 5565 (QCA ROME device 0cf3:e009) */
759 		.matches = {
760 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
761 			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5565"),
762 		},
763 	},
764 	{}
765 };
766 
767 struct qca_dump_info {
768 	/* fields for dump collection */
769 	u16 id_vendor;
770 	u16 id_product;
771 	u32 fw_version;
772 	u32 controller_id;
773 	u32 ram_dump_size;
774 	u16 ram_dump_seqno;
775 };
776 
777 #define BTUSB_MAX_ISOC_FRAMES	10
778 
779 #define BTUSB_INTR_RUNNING	0
780 #define BTUSB_BULK_RUNNING	1
781 #define BTUSB_ISOC_RUNNING	2
782 #define BTUSB_SUSPENDING	3
783 #define BTUSB_DID_ISO_RESUME	4
784 #define BTUSB_BOOTLOADER	5
785 #define BTUSB_DOWNLOADING	6
786 #define BTUSB_FIRMWARE_LOADED	7
787 #define BTUSB_FIRMWARE_FAILED	8
788 #define BTUSB_BOOTING		9
789 #define BTUSB_DIAG_RUNNING	10
790 #define BTUSB_OOB_WAKE_ENABLED	11
791 #define BTUSB_HW_RESET_ACTIVE	12
792 #define BTUSB_TX_WAIT_VND_EVT	13
793 #define BTUSB_WAKEUP_AUTOSUSPEND	14
794 #define BTUSB_USE_ALT3_FOR_WBS	15
795 #define BTUSB_ALT6_CONTINUOUS_TX	16
796 #define BTUSB_HW_SSR_ACTIVE	17
797 
798 struct btusb_data {
799 	struct hci_dev       *hdev;
800 	struct usb_device    *udev;
801 	struct usb_interface *intf;
802 	struct usb_interface *isoc;
803 	struct usb_interface *diag;
804 	unsigned isoc_ifnum;
805 
806 	unsigned long flags;
807 
808 	bool poll_sync;
809 	int intr_interval;
810 	struct work_struct  work;
811 	struct work_struct  waker;
812 	struct delayed_work rx_work;
813 
814 	struct sk_buff_head acl_q;
815 
816 	struct usb_anchor deferred;
817 	struct usb_anchor tx_anchor;
818 	int tx_in_flight;
819 	spinlock_t txlock;
820 
821 	struct usb_anchor intr_anchor;
822 	struct usb_anchor bulk_anchor;
823 	struct usb_anchor isoc_anchor;
824 	struct usb_anchor diag_anchor;
825 	struct usb_anchor ctrl_anchor;
826 	spinlock_t rxlock;
827 
828 	struct sk_buff *evt_skb;
829 	struct sk_buff *acl_skb;
830 	struct sk_buff *sco_skb;
831 
832 	struct usb_endpoint_descriptor *intr_ep;
833 	struct usb_endpoint_descriptor *bulk_tx_ep;
834 	struct usb_endpoint_descriptor *bulk_rx_ep;
835 	struct usb_endpoint_descriptor *isoc_tx_ep;
836 	struct usb_endpoint_descriptor *isoc_rx_ep;
837 	struct usb_endpoint_descriptor *diag_tx_ep;
838 	struct usb_endpoint_descriptor *diag_rx_ep;
839 
840 	struct gpio_desc *reset_gpio;
841 
842 	__u8 cmdreq_type;
843 	__u8 cmdreq;
844 
845 	unsigned int sco_num;
846 	unsigned int air_mode;
847 	bool usb_alt6_packet_flow;
848 	int isoc_altsetting;
849 	int suspend_count;
850 
851 	int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
852 	int (*recv_acl)(struct hci_dev *hdev, struct sk_buff *skb);
853 	int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
854 
855 	int (*setup_on_usb)(struct hci_dev *hdev);
856 
857 	int oob_wake_irq;   /* irq for out-of-band wake-on-bt */
858 	unsigned cmd_timeout_cnt;
859 
860 	struct qca_dump_info qca_dump;
861 };
862 
863 static void btusb_reset(struct hci_dev *hdev)
864 {
865 	struct btusb_data *data;
866 	int err;
867 
868 	if (hdev->reset) {
869 		hdev->reset(hdev);
870 		return;
871 	}
872 
873 	data = hci_get_drvdata(hdev);
874 	/* This is not an unbalanced PM reference since the device will reset */
875 	err = usb_autopm_get_interface(data->intf);
876 	if (err) {
877 		bt_dev_err(hdev, "Failed usb_autopm_get_interface: %d", err);
878 		return;
879 	}
880 
881 	bt_dev_err(hdev, "Resetting usb device.");
882 	usb_queue_reset_device(data->intf);
883 }
884 
885 static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
886 {
887 	struct btusb_data *data = hci_get_drvdata(hdev);
888 	struct gpio_desc *reset_gpio = data->reset_gpio;
889 	struct btintel_data *intel_data = hci_get_priv(hdev);
890 
891 	if (++data->cmd_timeout_cnt < 5)
892 		return;
893 
894 	if (intel_data->acpi_reset_method) {
895 		if (test_and_set_bit(INTEL_ACPI_RESET_ACTIVE, intel_data->flags)) {
896 			bt_dev_err(hdev, "acpi: last reset failed ? Not resetting again");
897 			return;
898 		}
899 
900 		bt_dev_err(hdev, "Initiating acpi reset method");
901 		/* If ACPI reset method fails, lets try with legacy GPIO
902 		 * toggling
903 		 */
904 		if (!intel_data->acpi_reset_method(hdev)) {
905 			return;
906 		}
907 	}
908 
909 	if (!reset_gpio) {
910 		btusb_reset(hdev);
911 		return;
912 	}
913 
914 	/*
915 	 * Toggle the hard reset line if the platform provides one. The reset
916 	 * is going to yank the device off the USB and then replug. So doing
917 	 * once is enough. The cleanup is handled correctly on the way out
918 	 * (standard USB disconnect), and the new device is detected cleanly
919 	 * and bound to the driver again like it should be.
920 	 */
921 	if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
922 		bt_dev_err(hdev, "last reset failed? Not resetting again");
923 		return;
924 	}
925 
926 	bt_dev_err(hdev, "Initiating HW reset via gpio");
927 	gpiod_set_value_cansleep(reset_gpio, 1);
928 	msleep(100);
929 	gpiod_set_value_cansleep(reset_gpio, 0);
930 }
931 
932 #define RTK_DEVCOREDUMP_CODE_MEMDUMP		0x01
933 #define RTK_DEVCOREDUMP_CODE_HW_ERR		0x02
934 #define RTK_DEVCOREDUMP_CODE_CMD_TIMEOUT	0x03
935 
936 #define RTK_SUB_EVENT_CODE_COREDUMP		0x34
937 
938 struct rtk_dev_coredump_hdr {
939 	u8 type;
940 	u8 code;
941 	u8 reserved[2];
942 } __packed;
943 
944 static inline void btusb_rtl_alloc_devcoredump(struct hci_dev *hdev,
945 		struct rtk_dev_coredump_hdr *hdr, u8 *buf, u32 len)
946 {
947 	struct sk_buff *skb;
948 
949 	skb = alloc_skb(len + sizeof(*hdr), GFP_ATOMIC);
950 	if (!skb)
951 		return;
952 
953 	skb_put_data(skb, hdr, sizeof(*hdr));
954 	if (len)
955 		skb_put_data(skb, buf, len);
956 
957 	if (!hci_devcd_init(hdev, skb->len)) {
958 		hci_devcd_append(hdev, skb);
959 		hci_devcd_complete(hdev);
960 	} else {
961 		bt_dev_err(hdev, "RTL: Failed to generate devcoredump");
962 		kfree_skb(skb);
963 	}
964 }
965 
966 static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
967 {
968 	struct btusb_data *data = hci_get_drvdata(hdev);
969 	struct gpio_desc *reset_gpio = data->reset_gpio;
970 	struct rtk_dev_coredump_hdr hdr = {
971 		.type = RTK_DEVCOREDUMP_CODE_CMD_TIMEOUT,
972 	};
973 
974 	btusb_rtl_alloc_devcoredump(hdev, &hdr, NULL, 0);
975 
976 	if (++data->cmd_timeout_cnt < 5)
977 		return;
978 
979 	if (!reset_gpio) {
980 		btusb_reset(hdev);
981 		return;
982 	}
983 
984 	/* Toggle the hard reset line. The Realtek device is going to
985 	 * yank itself off the USB and then replug. The cleanup is handled
986 	 * correctly on the way out (standard USB disconnect), and the new
987 	 * device is detected cleanly and bound to the driver again like
988 	 * it should be.
989 	 */
990 	if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
991 		bt_dev_err(hdev, "last reset failed? Not resetting again");
992 		return;
993 	}
994 
995 	bt_dev_err(hdev, "Reset Realtek device via gpio");
996 	gpiod_set_value_cansleep(reset_gpio, 1);
997 	msleep(200);
998 	gpiod_set_value_cansleep(reset_gpio, 0);
999 }
1000 
1001 static void btusb_rtl_hw_error(struct hci_dev *hdev, u8 code)
1002 {
1003 	struct rtk_dev_coredump_hdr hdr = {
1004 		.type = RTK_DEVCOREDUMP_CODE_HW_ERR,
1005 		.code = code,
1006 	};
1007 
1008 	bt_dev_err(hdev, "RTL: hw err, trigger devcoredump (%d)", code);
1009 
1010 	btusb_rtl_alloc_devcoredump(hdev, &hdr, NULL, 0);
1011 }
1012 
1013 static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
1014 {
1015 	struct btusb_data *data = hci_get_drvdata(hdev);
1016 	struct gpio_desc *reset_gpio = data->reset_gpio;
1017 
1018 	if (test_bit(BTUSB_HW_SSR_ACTIVE, &data->flags)) {
1019 		bt_dev_info(hdev, "Ramdump in progress, defer cmd_timeout");
1020 		return;
1021 	}
1022 
1023 	if (++data->cmd_timeout_cnt < 5)
1024 		return;
1025 
1026 	if (reset_gpio) {
1027 		bt_dev_err(hdev, "Reset qca device via bt_en gpio");
1028 
1029 		/* Toggle the hard reset line. The qca bt device is going to
1030 		 * yank itself off the USB and then replug. The cleanup is handled
1031 		 * correctly on the way out (standard USB disconnect), and the new
1032 		 * device is detected cleanly and bound to the driver again like
1033 		 * it should be.
1034 		 */
1035 		if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
1036 			bt_dev_err(hdev, "last reset failed? Not resetting again");
1037 			return;
1038 		}
1039 
1040 		gpiod_set_value_cansleep(reset_gpio, 0);
1041 		msleep(200);
1042 		gpiod_set_value_cansleep(reset_gpio, 1);
1043 
1044 		return;
1045 	}
1046 
1047 	btusb_reset(hdev);
1048 }
1049 
1050 static inline void btusb_free_frags(struct btusb_data *data)
1051 {
1052 	unsigned long flags;
1053 
1054 	spin_lock_irqsave(&data->rxlock, flags);
1055 
1056 	dev_kfree_skb_irq(data->evt_skb);
1057 	data->evt_skb = NULL;
1058 
1059 	dev_kfree_skb_irq(data->acl_skb);
1060 	data->acl_skb = NULL;
1061 
1062 	dev_kfree_skb_irq(data->sco_skb);
1063 	data->sco_skb = NULL;
1064 
1065 	spin_unlock_irqrestore(&data->rxlock, flags);
1066 }
1067 
1068 static int btusb_recv_event(struct btusb_data *data, struct sk_buff *skb)
1069 {
1070 	if (data->intr_interval) {
1071 		/* Trigger dequeue immediatelly if an event is received */
1072 		schedule_delayed_work(&data->rx_work, 0);
1073 	}
1074 
1075 	return data->recv_event(data->hdev, skb);
1076 }
1077 
1078 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
1079 {
1080 	struct sk_buff *skb;
1081 	unsigned long flags;
1082 	int err = 0;
1083 
1084 	spin_lock_irqsave(&data->rxlock, flags);
1085 	skb = data->evt_skb;
1086 
1087 	while (count) {
1088 		int len;
1089 
1090 		if (!skb) {
1091 			skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
1092 			if (!skb) {
1093 				err = -ENOMEM;
1094 				break;
1095 			}
1096 
1097 			hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
1098 			hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
1099 		}
1100 
1101 		len = min_t(uint, hci_skb_expect(skb), count);
1102 		skb_put_data(skb, buffer, len);
1103 
1104 		count -= len;
1105 		buffer += len;
1106 		hci_skb_expect(skb) -= len;
1107 
1108 		if (skb->len == HCI_EVENT_HDR_SIZE) {
1109 			/* Complete event header */
1110 			hci_skb_expect(skb) = hci_event_hdr(skb)->plen;
1111 
1112 			if (skb_tailroom(skb) < hci_skb_expect(skb)) {
1113 				kfree_skb(skb);
1114 				skb = NULL;
1115 
1116 				err = -EILSEQ;
1117 				break;
1118 			}
1119 		}
1120 
1121 		if (!hci_skb_expect(skb)) {
1122 			/* Complete frame */
1123 			btusb_recv_event(data, skb);
1124 			skb = NULL;
1125 		}
1126 	}
1127 
1128 	data->evt_skb = skb;
1129 	spin_unlock_irqrestore(&data->rxlock, flags);
1130 
1131 	return err;
1132 }
1133 
1134 static int btusb_recv_acl(struct btusb_data *data, struct sk_buff *skb)
1135 {
1136 	/* Only queue ACL packet if intr_interval is set as it means
1137 	 * force_poll_sync has been enabled.
1138 	 */
1139 	if (!data->intr_interval)
1140 		return data->recv_acl(data->hdev, skb);
1141 
1142 	skb_queue_tail(&data->acl_q, skb);
1143 	schedule_delayed_work(&data->rx_work, data->intr_interval);
1144 
1145 	return 0;
1146 }
1147 
1148 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
1149 {
1150 	struct sk_buff *skb;
1151 	unsigned long flags;
1152 	int err = 0;
1153 
1154 	spin_lock_irqsave(&data->rxlock, flags);
1155 	skb = data->acl_skb;
1156 
1157 	while (count) {
1158 		int len;
1159 
1160 		if (!skb) {
1161 			skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
1162 			if (!skb) {
1163 				err = -ENOMEM;
1164 				break;
1165 			}
1166 
1167 			hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
1168 			hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
1169 		}
1170 
1171 		len = min_t(uint, hci_skb_expect(skb), count);
1172 		skb_put_data(skb, buffer, len);
1173 
1174 		count -= len;
1175 		buffer += len;
1176 		hci_skb_expect(skb) -= len;
1177 
1178 		if (skb->len == HCI_ACL_HDR_SIZE) {
1179 			__le16 dlen = hci_acl_hdr(skb)->dlen;
1180 
1181 			/* Complete ACL header */
1182 			hci_skb_expect(skb) = __le16_to_cpu(dlen);
1183 
1184 			if (skb_tailroom(skb) < hci_skb_expect(skb)) {
1185 				kfree_skb(skb);
1186 				skb = NULL;
1187 
1188 				err = -EILSEQ;
1189 				break;
1190 			}
1191 		}
1192 
1193 		if (!hci_skb_expect(skb)) {
1194 			/* Complete frame */
1195 			btusb_recv_acl(data, skb);
1196 			skb = NULL;
1197 		}
1198 	}
1199 
1200 	data->acl_skb = skb;
1201 	spin_unlock_irqrestore(&data->rxlock, flags);
1202 
1203 	return err;
1204 }
1205 
1206 static bool btusb_validate_sco_handle(struct hci_dev *hdev,
1207 				      struct hci_sco_hdr *hdr)
1208 {
1209 	__u16 handle;
1210 
1211 	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
1212 		// Can't validate, userspace controls everything.
1213 		return true;
1214 
1215 	/*
1216 	 * USB isochronous transfers are not designed to be reliable and may
1217 	 * lose fragments.  When this happens, the next first fragment
1218 	 * encountered might actually be a continuation fragment.
1219 	 * Validate the handle to detect it and drop it, or else the upper
1220 	 * layer will get garbage for a while.
1221 	 */
1222 
1223 	handle = hci_handle(__le16_to_cpu(hdr->handle));
1224 
1225 	switch (hci_conn_lookup_type(hdev, handle)) {
1226 	case SCO_LINK:
1227 	case ESCO_LINK:
1228 		return true;
1229 	default:
1230 		return false;
1231 	}
1232 }
1233 
1234 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
1235 {
1236 	struct sk_buff *skb;
1237 	unsigned long flags;
1238 	int err = 0;
1239 
1240 	spin_lock_irqsave(&data->rxlock, flags);
1241 	skb = data->sco_skb;
1242 
1243 	while (count) {
1244 		int len;
1245 
1246 		if (!skb) {
1247 			skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
1248 			if (!skb) {
1249 				err = -ENOMEM;
1250 				break;
1251 			}
1252 
1253 			hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
1254 			hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
1255 		}
1256 
1257 		len = min_t(uint, hci_skb_expect(skb), count);
1258 		skb_put_data(skb, buffer, len);
1259 
1260 		count -= len;
1261 		buffer += len;
1262 		hci_skb_expect(skb) -= len;
1263 
1264 		if (skb->len == HCI_SCO_HDR_SIZE) {
1265 			/* Complete SCO header */
1266 			struct hci_sco_hdr *hdr = hci_sco_hdr(skb);
1267 
1268 			hci_skb_expect(skb) = hdr->dlen;
1269 
1270 			if (skb_tailroom(skb) < hci_skb_expect(skb) ||
1271 			    !btusb_validate_sco_handle(data->hdev, hdr)) {
1272 				kfree_skb(skb);
1273 				skb = NULL;
1274 
1275 				err = -EILSEQ;
1276 				break;
1277 			}
1278 		}
1279 
1280 		if (!hci_skb_expect(skb)) {
1281 			/* Complete frame */
1282 			hci_recv_frame(data->hdev, skb);
1283 			skb = NULL;
1284 		}
1285 	}
1286 
1287 	data->sco_skb = skb;
1288 	spin_unlock_irqrestore(&data->rxlock, flags);
1289 
1290 	return err;
1291 }
1292 
1293 static void btusb_intr_complete(struct urb *urb)
1294 {
1295 	struct hci_dev *hdev = urb->context;
1296 	struct btusb_data *data = hci_get_drvdata(hdev);
1297 	int err;
1298 
1299 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1300 	       urb->actual_length);
1301 
1302 	if (!test_bit(HCI_RUNNING, &hdev->flags))
1303 		return;
1304 
1305 	if (urb->status == 0) {
1306 		hdev->stat.byte_rx += urb->actual_length;
1307 
1308 		if (btusb_recv_intr(data, urb->transfer_buffer,
1309 				    urb->actual_length) < 0) {
1310 			bt_dev_err(hdev, "corrupted event packet");
1311 			hdev->stat.err_rx++;
1312 		}
1313 	} else if (urb->status == -ENOENT) {
1314 		/* Avoid suspend failed when usb_kill_urb */
1315 		return;
1316 	}
1317 
1318 	if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
1319 		return;
1320 
1321 	usb_mark_last_busy(data->udev);
1322 	usb_anchor_urb(urb, &data->intr_anchor);
1323 
1324 	err = usb_submit_urb(urb, GFP_ATOMIC);
1325 	if (err < 0) {
1326 		/* -EPERM: urb is being killed;
1327 		 * -ENODEV: device got disconnected
1328 		 */
1329 		if (err != -EPERM && err != -ENODEV)
1330 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1331 				   urb, -err);
1332 		if (err != -EPERM)
1333 			hci_cmd_sync_cancel(hdev, -err);
1334 		usb_unanchor_urb(urb);
1335 	}
1336 }
1337 
1338 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
1339 {
1340 	struct btusb_data *data = hci_get_drvdata(hdev);
1341 	struct urb *urb;
1342 	unsigned char *buf;
1343 	unsigned int pipe;
1344 	int err, size;
1345 
1346 	BT_DBG("%s", hdev->name);
1347 
1348 	if (!data->intr_ep)
1349 		return -ENODEV;
1350 
1351 	urb = usb_alloc_urb(0, mem_flags);
1352 	if (!urb)
1353 		return -ENOMEM;
1354 
1355 	size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
1356 
1357 	buf = kmalloc(size, mem_flags);
1358 	if (!buf) {
1359 		usb_free_urb(urb);
1360 		return -ENOMEM;
1361 	}
1362 
1363 	pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
1364 
1365 	usb_fill_int_urb(urb, data->udev, pipe, buf, size,
1366 			 btusb_intr_complete, hdev, data->intr_ep->bInterval);
1367 
1368 	urb->transfer_flags |= URB_FREE_BUFFER;
1369 
1370 	usb_anchor_urb(urb, &data->intr_anchor);
1371 
1372 	err = usb_submit_urb(urb, mem_flags);
1373 	if (err < 0) {
1374 		if (err != -EPERM && err != -ENODEV)
1375 			bt_dev_err(hdev, "urb %p submission failed (%d)",
1376 				   urb, -err);
1377 		if (err != -EPERM)
1378 			hci_cmd_sync_cancel(hdev, -err);
1379 		usb_unanchor_urb(urb);
1380 	}
1381 
1382 	/* Only initialize intr_interval if URB poll sync is enabled */
1383 	if (!data->poll_sync)
1384 		goto done;
1385 
1386 	/* The units are frames (milliseconds) for full and low speed devices,
1387 	 * and microframes (1/8 millisecond) for highspeed and SuperSpeed
1388 	 * devices.
1389 	 *
1390 	 * This is done once on open/resume so it shouldn't change even if
1391 	 * force_poll_sync changes.
1392 	 */
1393 	switch (urb->dev->speed) {
1394 	case USB_SPEED_SUPER_PLUS:
1395 	case USB_SPEED_SUPER:	/* units are 125us */
1396 		data->intr_interval = usecs_to_jiffies(urb->interval * 125);
1397 		break;
1398 	default:
1399 		data->intr_interval = msecs_to_jiffies(urb->interval);
1400 		break;
1401 	}
1402 
1403 done:
1404 	usb_free_urb(urb);
1405 
1406 	return err;
1407 }
1408 
1409 static void btusb_bulk_complete(struct urb *urb)
1410 {
1411 	struct hci_dev *hdev = urb->context;
1412 	struct btusb_data *data = hci_get_drvdata(hdev);
1413 	int err;
1414 
1415 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1416 	       urb->actual_length);
1417 
1418 	if (!test_bit(HCI_RUNNING, &hdev->flags))
1419 		return;
1420 
1421 	if (urb->status == 0) {
1422 		hdev->stat.byte_rx += urb->actual_length;
1423 
1424 		if (data->recv_bulk(data, urb->transfer_buffer,
1425 				    urb->actual_length) < 0) {
1426 			bt_dev_err(hdev, "corrupted ACL packet");
1427 			hdev->stat.err_rx++;
1428 		}
1429 	} else if (urb->status == -ENOENT) {
1430 		/* Avoid suspend failed when usb_kill_urb */
1431 		return;
1432 	}
1433 
1434 	if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
1435 		return;
1436 
1437 	usb_anchor_urb(urb, &data->bulk_anchor);
1438 	usb_mark_last_busy(data->udev);
1439 
1440 	err = usb_submit_urb(urb, GFP_ATOMIC);
1441 	if (err < 0) {
1442 		/* -EPERM: urb is being killed;
1443 		 * -ENODEV: device got disconnected
1444 		 */
1445 		if (err != -EPERM && err != -ENODEV)
1446 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1447 				   urb, -err);
1448 		usb_unanchor_urb(urb);
1449 	}
1450 }
1451 
1452 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
1453 {
1454 	struct btusb_data *data = hci_get_drvdata(hdev);
1455 	struct urb *urb;
1456 	unsigned char *buf;
1457 	unsigned int pipe;
1458 	int err, size = HCI_MAX_FRAME_SIZE;
1459 
1460 	BT_DBG("%s", hdev->name);
1461 
1462 	if (!data->bulk_rx_ep)
1463 		return -ENODEV;
1464 
1465 	urb = usb_alloc_urb(0, mem_flags);
1466 	if (!urb)
1467 		return -ENOMEM;
1468 
1469 	buf = kmalloc(size, mem_flags);
1470 	if (!buf) {
1471 		usb_free_urb(urb);
1472 		return -ENOMEM;
1473 	}
1474 
1475 	pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
1476 
1477 	usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1478 			  btusb_bulk_complete, hdev);
1479 
1480 	urb->transfer_flags |= URB_FREE_BUFFER;
1481 
1482 	usb_mark_last_busy(data->udev);
1483 	usb_anchor_urb(urb, &data->bulk_anchor);
1484 
1485 	err = usb_submit_urb(urb, mem_flags);
1486 	if (err < 0) {
1487 		if (err != -EPERM && err != -ENODEV)
1488 			bt_dev_err(hdev, "urb %p submission failed (%d)",
1489 				   urb, -err);
1490 		usb_unanchor_urb(urb);
1491 	}
1492 
1493 	usb_free_urb(urb);
1494 
1495 	return err;
1496 }
1497 
1498 static void btusb_isoc_complete(struct urb *urb)
1499 {
1500 	struct hci_dev *hdev = urb->context;
1501 	struct btusb_data *data = hci_get_drvdata(hdev);
1502 	int i, err;
1503 
1504 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1505 	       urb->actual_length);
1506 
1507 	if (!test_bit(HCI_RUNNING, &hdev->flags))
1508 		return;
1509 
1510 	if (urb->status == 0) {
1511 		for (i = 0; i < urb->number_of_packets; i++) {
1512 			unsigned int offset = urb->iso_frame_desc[i].offset;
1513 			unsigned int length = urb->iso_frame_desc[i].actual_length;
1514 
1515 			if (urb->iso_frame_desc[i].status)
1516 				continue;
1517 
1518 			hdev->stat.byte_rx += length;
1519 
1520 			if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
1521 					    length) < 0) {
1522 				bt_dev_err(hdev, "corrupted SCO packet");
1523 				hdev->stat.err_rx++;
1524 			}
1525 		}
1526 	} else if (urb->status == -ENOENT) {
1527 		/* Avoid suspend failed when usb_kill_urb */
1528 		return;
1529 	}
1530 
1531 	if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
1532 		return;
1533 
1534 	usb_anchor_urb(urb, &data->isoc_anchor);
1535 
1536 	err = usb_submit_urb(urb, GFP_ATOMIC);
1537 	if (err < 0) {
1538 		/* -EPERM: urb is being killed;
1539 		 * -ENODEV: device got disconnected
1540 		 */
1541 		if (err != -EPERM && err != -ENODEV)
1542 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1543 				   urb, -err);
1544 		usb_unanchor_urb(urb);
1545 	}
1546 }
1547 
1548 static inline void __fill_isoc_descriptor_msbc(struct urb *urb, int len,
1549 					       int mtu, struct btusb_data *data)
1550 {
1551 	int i = 0, offset = 0;
1552 	unsigned int interval;
1553 
1554 	BT_DBG("len %d mtu %d", len, mtu);
1555 
1556 	/* For mSBC ALT 6 settings some chips need to transmit the data
1557 	 * continuously without the zero length of USB packets.
1558 	 */
1559 	if (test_bit(BTUSB_ALT6_CONTINUOUS_TX, &data->flags))
1560 		goto ignore_usb_alt6_packet_flow;
1561 
1562 	/* For mSBC ALT 6 setting the host will send the packet at continuous
1563 	 * flow. As per core spec 5, vol 4, part B, table 2.1. For ALT setting
1564 	 * 6 the HCI PACKET INTERVAL should be 7.5ms for every usb packets.
1565 	 * To maintain the rate we send 63bytes of usb packets alternatively for
1566 	 * 7ms and 8ms to maintain the rate as 7.5ms.
1567 	 */
1568 	if (data->usb_alt6_packet_flow) {
1569 		interval = 7;
1570 		data->usb_alt6_packet_flow = false;
1571 	} else {
1572 		interval = 6;
1573 		data->usb_alt6_packet_flow = true;
1574 	}
1575 
1576 	for (i = 0; i < interval; i++) {
1577 		urb->iso_frame_desc[i].offset = offset;
1578 		urb->iso_frame_desc[i].length = offset;
1579 	}
1580 
1581 ignore_usb_alt6_packet_flow:
1582 	if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1583 		urb->iso_frame_desc[i].offset = offset;
1584 		urb->iso_frame_desc[i].length = len;
1585 		i++;
1586 	}
1587 
1588 	urb->number_of_packets = i;
1589 }
1590 
1591 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
1592 {
1593 	int i, offset = 0;
1594 
1595 	BT_DBG("len %d mtu %d", len, mtu);
1596 
1597 	for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
1598 					i++, offset += mtu, len -= mtu) {
1599 		urb->iso_frame_desc[i].offset = offset;
1600 		urb->iso_frame_desc[i].length = mtu;
1601 	}
1602 
1603 	if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1604 		urb->iso_frame_desc[i].offset = offset;
1605 		urb->iso_frame_desc[i].length = len;
1606 		i++;
1607 	}
1608 
1609 	urb->number_of_packets = i;
1610 }
1611 
1612 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
1613 {
1614 	struct btusb_data *data = hci_get_drvdata(hdev);
1615 	struct urb *urb;
1616 	unsigned char *buf;
1617 	unsigned int pipe;
1618 	int err, size;
1619 
1620 	BT_DBG("%s", hdev->name);
1621 
1622 	if (!data->isoc_rx_ep)
1623 		return -ENODEV;
1624 
1625 	urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
1626 	if (!urb)
1627 		return -ENOMEM;
1628 
1629 	size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
1630 						BTUSB_MAX_ISOC_FRAMES;
1631 
1632 	buf = kmalloc(size, mem_flags);
1633 	if (!buf) {
1634 		usb_free_urb(urb);
1635 		return -ENOMEM;
1636 	}
1637 
1638 	pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
1639 
1640 	usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
1641 			 hdev, data->isoc_rx_ep->bInterval);
1642 
1643 	urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
1644 
1645 	__fill_isoc_descriptor(urb, size,
1646 			       le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
1647 
1648 	usb_anchor_urb(urb, &data->isoc_anchor);
1649 
1650 	err = usb_submit_urb(urb, mem_flags);
1651 	if (err < 0) {
1652 		if (err != -EPERM && err != -ENODEV)
1653 			bt_dev_err(hdev, "urb %p submission failed (%d)",
1654 				   urb, -err);
1655 		usb_unanchor_urb(urb);
1656 	}
1657 
1658 	usb_free_urb(urb);
1659 
1660 	return err;
1661 }
1662 
1663 static void btusb_diag_complete(struct urb *urb)
1664 {
1665 	struct hci_dev *hdev = urb->context;
1666 	struct btusb_data *data = hci_get_drvdata(hdev);
1667 	int err;
1668 
1669 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1670 	       urb->actual_length);
1671 
1672 	if (urb->status == 0) {
1673 		struct sk_buff *skb;
1674 
1675 		skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
1676 		if (skb) {
1677 			skb_put_data(skb, urb->transfer_buffer,
1678 				     urb->actual_length);
1679 			hci_recv_diag(hdev, skb);
1680 		}
1681 	} else if (urb->status == -ENOENT) {
1682 		/* Avoid suspend failed when usb_kill_urb */
1683 		return;
1684 	}
1685 
1686 	if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
1687 		return;
1688 
1689 	usb_anchor_urb(urb, &data->diag_anchor);
1690 	usb_mark_last_busy(data->udev);
1691 
1692 	err = usb_submit_urb(urb, GFP_ATOMIC);
1693 	if (err < 0) {
1694 		/* -EPERM: urb is being killed;
1695 		 * -ENODEV: device got disconnected
1696 		 */
1697 		if (err != -EPERM && err != -ENODEV)
1698 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1699 				   urb, -err);
1700 		usb_unanchor_urb(urb);
1701 	}
1702 }
1703 
1704 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
1705 {
1706 	struct btusb_data *data = hci_get_drvdata(hdev);
1707 	struct urb *urb;
1708 	unsigned char *buf;
1709 	unsigned int pipe;
1710 	int err, size = HCI_MAX_FRAME_SIZE;
1711 
1712 	BT_DBG("%s", hdev->name);
1713 
1714 	if (!data->diag_rx_ep)
1715 		return -ENODEV;
1716 
1717 	urb = usb_alloc_urb(0, mem_flags);
1718 	if (!urb)
1719 		return -ENOMEM;
1720 
1721 	buf = kmalloc(size, mem_flags);
1722 	if (!buf) {
1723 		usb_free_urb(urb);
1724 		return -ENOMEM;
1725 	}
1726 
1727 	pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
1728 
1729 	usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1730 			  btusb_diag_complete, hdev);
1731 
1732 	urb->transfer_flags |= URB_FREE_BUFFER;
1733 
1734 	usb_mark_last_busy(data->udev);
1735 	usb_anchor_urb(urb, &data->diag_anchor);
1736 
1737 	err = usb_submit_urb(urb, mem_flags);
1738 	if (err < 0) {
1739 		if (err != -EPERM && err != -ENODEV)
1740 			bt_dev_err(hdev, "urb %p submission failed (%d)",
1741 				   urb, -err);
1742 		usb_unanchor_urb(urb);
1743 	}
1744 
1745 	usb_free_urb(urb);
1746 
1747 	return err;
1748 }
1749 
1750 static void btusb_tx_complete(struct urb *urb)
1751 {
1752 	struct sk_buff *skb = urb->context;
1753 	struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1754 	struct btusb_data *data = hci_get_drvdata(hdev);
1755 	unsigned long flags;
1756 
1757 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1758 	       urb->actual_length);
1759 
1760 	if (!test_bit(HCI_RUNNING, &hdev->flags))
1761 		goto done;
1762 
1763 	if (!urb->status) {
1764 		hdev->stat.byte_tx += urb->transfer_buffer_length;
1765 	} else {
1766 		if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT)
1767 			hci_cmd_sync_cancel(hdev, -urb->status);
1768 		hdev->stat.err_tx++;
1769 	}
1770 
1771 done:
1772 	spin_lock_irqsave(&data->txlock, flags);
1773 	data->tx_in_flight--;
1774 	spin_unlock_irqrestore(&data->txlock, flags);
1775 
1776 	kfree(urb->setup_packet);
1777 
1778 	kfree_skb(skb);
1779 }
1780 
1781 static void btusb_isoc_tx_complete(struct urb *urb)
1782 {
1783 	struct sk_buff *skb = urb->context;
1784 	struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1785 
1786 	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1787 	       urb->actual_length);
1788 
1789 	if (!test_bit(HCI_RUNNING, &hdev->flags))
1790 		goto done;
1791 
1792 	if (!urb->status)
1793 		hdev->stat.byte_tx += urb->transfer_buffer_length;
1794 	else
1795 		hdev->stat.err_tx++;
1796 
1797 done:
1798 	kfree(urb->setup_packet);
1799 
1800 	kfree_skb(skb);
1801 }
1802 
1803 static int btusb_open(struct hci_dev *hdev)
1804 {
1805 	struct btusb_data *data = hci_get_drvdata(hdev);
1806 	int err;
1807 
1808 	BT_DBG("%s", hdev->name);
1809 
1810 	err = usb_autopm_get_interface(data->intf);
1811 	if (err < 0)
1812 		return err;
1813 
1814 	/* Patching USB firmware files prior to starting any URBs of HCI path
1815 	 * It is more safe to use USB bulk channel for downloading USB patch
1816 	 */
1817 	if (data->setup_on_usb) {
1818 		err = data->setup_on_usb(hdev);
1819 		if (err < 0)
1820 			goto setup_fail;
1821 	}
1822 
1823 	data->intf->needs_remote_wakeup = 1;
1824 
1825 	if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1826 		goto done;
1827 
1828 	err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1829 	if (err < 0)
1830 		goto failed;
1831 
1832 	err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1833 	if (err < 0) {
1834 		usb_kill_anchored_urbs(&data->intr_anchor);
1835 		goto failed;
1836 	}
1837 
1838 	set_bit(BTUSB_BULK_RUNNING, &data->flags);
1839 	btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1840 
1841 	if (data->diag) {
1842 		if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1843 			set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1844 	}
1845 
1846 done:
1847 	usb_autopm_put_interface(data->intf);
1848 	return 0;
1849 
1850 failed:
1851 	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1852 setup_fail:
1853 	usb_autopm_put_interface(data->intf);
1854 	return err;
1855 }
1856 
1857 static void btusb_stop_traffic(struct btusb_data *data)
1858 {
1859 	usb_kill_anchored_urbs(&data->intr_anchor);
1860 	usb_kill_anchored_urbs(&data->bulk_anchor);
1861 	usb_kill_anchored_urbs(&data->isoc_anchor);
1862 	usb_kill_anchored_urbs(&data->diag_anchor);
1863 	usb_kill_anchored_urbs(&data->ctrl_anchor);
1864 }
1865 
1866 static int btusb_close(struct hci_dev *hdev)
1867 {
1868 	struct btusb_data *data = hci_get_drvdata(hdev);
1869 	int err;
1870 
1871 	BT_DBG("%s", hdev->name);
1872 
1873 	cancel_delayed_work(&data->rx_work);
1874 	cancel_work_sync(&data->work);
1875 	cancel_work_sync(&data->waker);
1876 
1877 	skb_queue_purge(&data->acl_q);
1878 
1879 	clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1880 	clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1881 	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1882 	clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1883 
1884 	btusb_stop_traffic(data);
1885 	btusb_free_frags(data);
1886 
1887 	err = usb_autopm_get_interface(data->intf);
1888 	if (err < 0)
1889 		goto failed;
1890 
1891 	data->intf->needs_remote_wakeup = 0;
1892 
1893 	/* Enable remote wake up for auto-suspend */
1894 	if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags))
1895 		data->intf->needs_remote_wakeup = 1;
1896 
1897 	usb_autopm_put_interface(data->intf);
1898 
1899 failed:
1900 	usb_scuttle_anchored_urbs(&data->deferred);
1901 	return 0;
1902 }
1903 
1904 static int btusb_flush(struct hci_dev *hdev)
1905 {
1906 	struct btusb_data *data = hci_get_drvdata(hdev);
1907 
1908 	BT_DBG("%s", hdev->name);
1909 
1910 	cancel_delayed_work(&data->rx_work);
1911 
1912 	skb_queue_purge(&data->acl_q);
1913 
1914 	usb_kill_anchored_urbs(&data->tx_anchor);
1915 	btusb_free_frags(data);
1916 
1917 	return 0;
1918 }
1919 
1920 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1921 {
1922 	struct btusb_data *data = hci_get_drvdata(hdev);
1923 	struct usb_ctrlrequest *dr;
1924 	struct urb *urb;
1925 	unsigned int pipe;
1926 
1927 	urb = usb_alloc_urb(0, GFP_KERNEL);
1928 	if (!urb)
1929 		return ERR_PTR(-ENOMEM);
1930 
1931 	dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1932 	if (!dr) {
1933 		usb_free_urb(urb);
1934 		return ERR_PTR(-ENOMEM);
1935 	}
1936 
1937 	dr->bRequestType = data->cmdreq_type;
1938 	dr->bRequest     = data->cmdreq;
1939 	dr->wIndex       = 0;
1940 	dr->wValue       = 0;
1941 	dr->wLength      = __cpu_to_le16(skb->len);
1942 
1943 	pipe = usb_sndctrlpipe(data->udev, 0x00);
1944 
1945 	usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1946 			     skb->data, skb->len, btusb_tx_complete, skb);
1947 
1948 	skb->dev = (void *)hdev;
1949 
1950 	return urb;
1951 }
1952 
1953 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1954 {
1955 	struct btusb_data *data = hci_get_drvdata(hdev);
1956 	struct urb *urb;
1957 	unsigned int pipe;
1958 
1959 	if (!data->bulk_tx_ep)
1960 		return ERR_PTR(-ENODEV);
1961 
1962 	urb = usb_alloc_urb(0, GFP_KERNEL);
1963 	if (!urb)
1964 		return ERR_PTR(-ENOMEM);
1965 
1966 	pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1967 
1968 	usb_fill_bulk_urb(urb, data->udev, pipe,
1969 			  skb->data, skb->len, btusb_tx_complete, skb);
1970 
1971 	skb->dev = (void *)hdev;
1972 
1973 	return urb;
1974 }
1975 
1976 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1977 {
1978 	struct btusb_data *data = hci_get_drvdata(hdev);
1979 	struct urb *urb;
1980 	unsigned int pipe;
1981 
1982 	if (!data->isoc_tx_ep)
1983 		return ERR_PTR(-ENODEV);
1984 
1985 	urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1986 	if (!urb)
1987 		return ERR_PTR(-ENOMEM);
1988 
1989 	pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1990 
1991 	usb_fill_int_urb(urb, data->udev, pipe,
1992 			 skb->data, skb->len, btusb_isoc_tx_complete,
1993 			 skb, data->isoc_tx_ep->bInterval);
1994 
1995 	urb->transfer_flags  = URB_ISO_ASAP;
1996 
1997 	if (data->isoc_altsetting == 6)
1998 		__fill_isoc_descriptor_msbc(urb, skb->len,
1999 					    le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize),
2000 					    data);
2001 	else
2002 		__fill_isoc_descriptor(urb, skb->len,
2003 				       le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
2004 	skb->dev = (void *)hdev;
2005 
2006 	return urb;
2007 }
2008 
2009 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
2010 {
2011 	struct btusb_data *data = hci_get_drvdata(hdev);
2012 	int err;
2013 
2014 	usb_anchor_urb(urb, &data->tx_anchor);
2015 
2016 	err = usb_submit_urb(urb, GFP_KERNEL);
2017 	if (err < 0) {
2018 		if (err != -EPERM && err != -ENODEV)
2019 			bt_dev_err(hdev, "urb %p submission failed (%d)",
2020 				   urb, -err);
2021 		kfree(urb->setup_packet);
2022 		usb_unanchor_urb(urb);
2023 	} else {
2024 		usb_mark_last_busy(data->udev);
2025 	}
2026 
2027 	usb_free_urb(urb);
2028 	return err;
2029 }
2030 
2031 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
2032 {
2033 	struct btusb_data *data = hci_get_drvdata(hdev);
2034 	unsigned long flags;
2035 	bool suspending;
2036 
2037 	spin_lock_irqsave(&data->txlock, flags);
2038 	suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
2039 	if (!suspending)
2040 		data->tx_in_flight++;
2041 	spin_unlock_irqrestore(&data->txlock, flags);
2042 
2043 	if (!suspending)
2044 		return submit_tx_urb(hdev, urb);
2045 
2046 	usb_anchor_urb(urb, &data->deferred);
2047 	schedule_work(&data->waker);
2048 
2049 	usb_free_urb(urb);
2050 	return 0;
2051 }
2052 
2053 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
2054 {
2055 	struct urb *urb;
2056 
2057 	BT_DBG("%s", hdev->name);
2058 
2059 	switch (hci_skb_pkt_type(skb)) {
2060 	case HCI_COMMAND_PKT:
2061 		urb = alloc_ctrl_urb(hdev, skb);
2062 		if (IS_ERR(urb))
2063 			return PTR_ERR(urb);
2064 
2065 		hdev->stat.cmd_tx++;
2066 		return submit_or_queue_tx_urb(hdev, urb);
2067 
2068 	case HCI_ACLDATA_PKT:
2069 		urb = alloc_bulk_urb(hdev, skb);
2070 		if (IS_ERR(urb))
2071 			return PTR_ERR(urb);
2072 
2073 		hdev->stat.acl_tx++;
2074 		return submit_or_queue_tx_urb(hdev, urb);
2075 
2076 	case HCI_SCODATA_PKT:
2077 		if (hci_conn_num(hdev, SCO_LINK) < 1)
2078 			return -ENODEV;
2079 
2080 		urb = alloc_isoc_urb(hdev, skb);
2081 		if (IS_ERR(urb))
2082 			return PTR_ERR(urb);
2083 
2084 		hdev->stat.sco_tx++;
2085 		return submit_tx_urb(hdev, urb);
2086 
2087 	case HCI_ISODATA_PKT:
2088 		urb = alloc_bulk_urb(hdev, skb);
2089 		if (IS_ERR(urb))
2090 			return PTR_ERR(urb);
2091 
2092 		return submit_or_queue_tx_urb(hdev, urb);
2093 	}
2094 
2095 	return -EILSEQ;
2096 }
2097 
2098 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
2099 {
2100 	struct btusb_data *data = hci_get_drvdata(hdev);
2101 
2102 	BT_DBG("%s evt %d", hdev->name, evt);
2103 
2104 	if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
2105 		data->sco_num = hci_conn_num(hdev, SCO_LINK);
2106 		data->air_mode = evt;
2107 		schedule_work(&data->work);
2108 	}
2109 }
2110 
2111 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
2112 {
2113 	struct btusb_data *data = hci_get_drvdata(hdev);
2114 	struct usb_interface *intf = data->isoc;
2115 	struct usb_endpoint_descriptor *ep_desc;
2116 	int i, err;
2117 
2118 	if (!data->isoc)
2119 		return -ENODEV;
2120 
2121 	err = usb_set_interface(data->udev, data->isoc_ifnum, altsetting);
2122 	if (err < 0) {
2123 		bt_dev_err(hdev, "setting interface failed (%d)", -err);
2124 		return err;
2125 	}
2126 
2127 	data->isoc_altsetting = altsetting;
2128 
2129 	data->isoc_tx_ep = NULL;
2130 	data->isoc_rx_ep = NULL;
2131 
2132 	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2133 		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2134 
2135 		if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
2136 			data->isoc_tx_ep = ep_desc;
2137 			continue;
2138 		}
2139 
2140 		if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
2141 			data->isoc_rx_ep = ep_desc;
2142 			continue;
2143 		}
2144 	}
2145 
2146 	if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
2147 		bt_dev_err(hdev, "invalid SCO descriptors");
2148 		return -ENODEV;
2149 	}
2150 
2151 	return 0;
2152 }
2153 
2154 static int btusb_switch_alt_setting(struct hci_dev *hdev, int new_alts)
2155 {
2156 	struct btusb_data *data = hci_get_drvdata(hdev);
2157 	int err;
2158 
2159 	if (data->isoc_altsetting != new_alts) {
2160 		unsigned long flags;
2161 
2162 		clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
2163 		usb_kill_anchored_urbs(&data->isoc_anchor);
2164 
2165 		/* When isochronous alternate setting needs to be
2166 		 * changed, because SCO connection has been added
2167 		 * or removed, a packet fragment may be left in the
2168 		 * reassembling state. This could lead to wrongly
2169 		 * assembled fragments.
2170 		 *
2171 		 * Clear outstanding fragment when selecting a new
2172 		 * alternate setting.
2173 		 */
2174 		spin_lock_irqsave(&data->rxlock, flags);
2175 		dev_kfree_skb_irq(data->sco_skb);
2176 		data->sco_skb = NULL;
2177 		spin_unlock_irqrestore(&data->rxlock, flags);
2178 
2179 		err = __set_isoc_interface(hdev, new_alts);
2180 		if (err < 0)
2181 			return err;
2182 	}
2183 
2184 	if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
2185 		if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
2186 			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
2187 		else
2188 			btusb_submit_isoc_urb(hdev, GFP_KERNEL);
2189 	}
2190 
2191 	return 0;
2192 }
2193 
2194 static struct usb_host_interface *btusb_find_altsetting(struct btusb_data *data,
2195 							int alt)
2196 {
2197 	struct usb_interface *intf = data->isoc;
2198 	int i;
2199 
2200 	BT_DBG("Looking for Alt no :%d", alt);
2201 
2202 	if (!intf)
2203 		return NULL;
2204 
2205 	for (i = 0; i < intf->num_altsetting; i++) {
2206 		if (intf->altsetting[i].desc.bAlternateSetting == alt)
2207 			return &intf->altsetting[i];
2208 	}
2209 
2210 	return NULL;
2211 }
2212 
2213 static void btusb_work(struct work_struct *work)
2214 {
2215 	struct btusb_data *data = container_of(work, struct btusb_data, work);
2216 	struct hci_dev *hdev = data->hdev;
2217 	int new_alts = 0;
2218 	int err;
2219 
2220 	if (data->sco_num > 0) {
2221 		if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
2222 			err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
2223 			if (err < 0) {
2224 				clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
2225 				usb_kill_anchored_urbs(&data->isoc_anchor);
2226 				return;
2227 			}
2228 
2229 			set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
2230 		}
2231 
2232 		if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_CVSD) {
2233 			if (hdev->voice_setting & 0x0020) {
2234 				static const int alts[3] = { 2, 4, 5 };
2235 
2236 				new_alts = alts[data->sco_num - 1];
2237 			} else {
2238 				new_alts = data->sco_num;
2239 			}
2240 		} else if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_TRANSP) {
2241 			/* Bluetooth USB spec recommends alt 6 (63 bytes), but
2242 			 * many adapters do not support it.  Alt 1 appears to
2243 			 * work for all adapters that do not have alt 6, and
2244 			 * which work with WBS at all.  Some devices prefer
2245 			 * alt 3 (HCI payload >= 60 Bytes let air packet
2246 			 * data satisfy 60 bytes), requiring
2247 			 * MTU >= 3 (packets) * 25 (size) - 3 (headers) = 72
2248 			 * see also Core spec 5, vol 4, B 2.1.1 & Table 2.1.
2249 			 */
2250 			if (btusb_find_altsetting(data, 6))
2251 				new_alts = 6;
2252 			else if (btusb_find_altsetting(data, 3) &&
2253 				 hdev->sco_mtu >= 72 &&
2254 				 test_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags))
2255 				new_alts = 3;
2256 			else
2257 				new_alts = 1;
2258 		}
2259 
2260 		if (btusb_switch_alt_setting(hdev, new_alts) < 0)
2261 			bt_dev_err(hdev, "set USB alt:(%d) failed!", new_alts);
2262 	} else {
2263 		usb_kill_anchored_urbs(&data->isoc_anchor);
2264 
2265 		if (test_and_clear_bit(BTUSB_ISOC_RUNNING, &data->flags))
2266 			__set_isoc_interface(hdev, 0);
2267 
2268 		if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
2269 			usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
2270 	}
2271 }
2272 
2273 static void btusb_waker(struct work_struct *work)
2274 {
2275 	struct btusb_data *data = container_of(work, struct btusb_data, waker);
2276 	int err;
2277 
2278 	err = usb_autopm_get_interface(data->intf);
2279 	if (err < 0)
2280 		return;
2281 
2282 	usb_autopm_put_interface(data->intf);
2283 }
2284 
2285 static void btusb_rx_work(struct work_struct *work)
2286 {
2287 	struct btusb_data *data = container_of(work, struct btusb_data,
2288 					       rx_work.work);
2289 	struct sk_buff *skb;
2290 
2291 	/* Dequeue ACL data received during the interval */
2292 	while ((skb = skb_dequeue(&data->acl_q)))
2293 		data->recv_acl(data->hdev, skb);
2294 }
2295 
2296 static int btusb_setup_bcm92035(struct hci_dev *hdev)
2297 {
2298 	struct sk_buff *skb;
2299 	u8 val = 0x00;
2300 
2301 	BT_DBG("%s", hdev->name);
2302 
2303 	skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
2304 	if (IS_ERR(skb))
2305 		bt_dev_err(hdev, "BCM92035 command failed (%ld)", PTR_ERR(skb));
2306 	else
2307 		kfree_skb(skb);
2308 
2309 	return 0;
2310 }
2311 
2312 static int btusb_setup_csr(struct hci_dev *hdev)
2313 {
2314 	struct btusb_data *data = hci_get_drvdata(hdev);
2315 	u16 bcdDevice = le16_to_cpu(data->udev->descriptor.bcdDevice);
2316 	struct hci_rp_read_local_version *rp;
2317 	struct sk_buff *skb;
2318 	bool is_fake = false;
2319 	int ret;
2320 
2321 	BT_DBG("%s", hdev->name);
2322 
2323 	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
2324 			     HCI_INIT_TIMEOUT);
2325 	if (IS_ERR(skb)) {
2326 		int err = PTR_ERR(skb);
2327 		bt_dev_err(hdev, "CSR: Local version failed (%d)", err);
2328 		return err;
2329 	}
2330 
2331 	rp = skb_pull_data(skb, sizeof(*rp));
2332 	if (!rp) {
2333 		bt_dev_err(hdev, "CSR: Local version length mismatch");
2334 		kfree_skb(skb);
2335 		return -EIO;
2336 	}
2337 
2338 	bt_dev_info(hdev, "CSR: Setting up dongle with HCI ver=%u rev=%04x",
2339 		    rp->hci_ver, le16_to_cpu(rp->hci_rev));
2340 
2341 	bt_dev_info(hdev, "LMP ver=%u subver=%04x; manufacturer=%u",
2342 		    rp->lmp_ver, le16_to_cpu(rp->lmp_subver),
2343 		    le16_to_cpu(rp->manufacturer));
2344 
2345 	/* Detect a wide host of Chinese controllers that aren't CSR.
2346 	 *
2347 	 * Known fake bcdDevices: 0x0100, 0x0134, 0x1915, 0x2520, 0x7558, 0x8891
2348 	 *
2349 	 * The main thing they have in common is that these are really popular low-cost
2350 	 * options that support newer Bluetooth versions but rely on heavy VID/PID
2351 	 * squatting of this poor old Bluetooth 1.1 device. Even sold as such.
2352 	 *
2353 	 * We detect actual CSR devices by checking that the HCI manufacturer code
2354 	 * is Cambridge Silicon Radio (10) and ensuring that LMP sub-version and
2355 	 * HCI rev values always match. As they both store the firmware number.
2356 	 */
2357 	if (le16_to_cpu(rp->manufacturer) != 10 ||
2358 	    le16_to_cpu(rp->hci_rev) != le16_to_cpu(rp->lmp_subver))
2359 		is_fake = true;
2360 
2361 	/* Known legit CSR firmware build numbers and their supported BT versions:
2362 	 * - 1.1 (0x1) -> 0x0073, 0x020d, 0x033c, 0x034e
2363 	 * - 1.2 (0x2) ->                 0x04d9, 0x0529
2364 	 * - 2.0 (0x3) ->         0x07a6, 0x07ad, 0x0c5c
2365 	 * - 2.1 (0x4) ->         0x149c, 0x1735, 0x1899 (0x1899 is a BlueCore4-External)
2366 	 * - 4.0 (0x6) ->         0x1d86, 0x2031, 0x22bb
2367 	 *
2368 	 * e.g. Real CSR dongles with LMP subversion 0x73 are old enough that
2369 	 *      support BT 1.1 only; so it's a dead giveaway when some
2370 	 *      third-party BT 4.0 dongle reuses it.
2371 	 */
2372 	else if (le16_to_cpu(rp->lmp_subver) <= 0x034e &&
2373 		 rp->hci_ver > BLUETOOTH_VER_1_1)
2374 		is_fake = true;
2375 
2376 	else if (le16_to_cpu(rp->lmp_subver) <= 0x0529 &&
2377 		 rp->hci_ver > BLUETOOTH_VER_1_2)
2378 		is_fake = true;
2379 
2380 	else if (le16_to_cpu(rp->lmp_subver) <= 0x0c5c &&
2381 		 rp->hci_ver > BLUETOOTH_VER_2_0)
2382 		is_fake = true;
2383 
2384 	else if (le16_to_cpu(rp->lmp_subver) <= 0x1899 &&
2385 		 rp->hci_ver > BLUETOOTH_VER_2_1)
2386 		is_fake = true;
2387 
2388 	else if (le16_to_cpu(rp->lmp_subver) <= 0x22bb &&
2389 		 rp->hci_ver > BLUETOOTH_VER_4_0)
2390 		is_fake = true;
2391 
2392 	/* Other clones which beat all the above checks */
2393 	else if (bcdDevice == 0x0134 &&
2394 		 le16_to_cpu(rp->lmp_subver) == 0x0c5c &&
2395 		 rp->hci_ver == BLUETOOTH_VER_2_0)
2396 		is_fake = true;
2397 
2398 	if (is_fake) {
2399 		bt_dev_warn(hdev, "CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once...");
2400 
2401 		/* Generally these clones have big discrepancies between
2402 		 * advertised features and what's actually supported.
2403 		 * Probably will need to be expanded in the future;
2404 		 * without these the controller will lock up.
2405 		 */
2406 		set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
2407 		set_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks);
2408 		set_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks);
2409 		set_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks);
2410 
2411 		/* Clear the reset quirk since this is not an actual
2412 		 * early Bluetooth 1.1 device from CSR.
2413 		 */
2414 		clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2415 		clear_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2416 
2417 		/*
2418 		 * Special workaround for these BT 4.0 chip clones, and potentially more:
2419 		 *
2420 		 * - 0x0134: a Barrot 8041a02                 (HCI rev: 0x0810 sub: 0x1012)
2421 		 * - 0x7558: IC markings FR3191AHAL 749H15143 (HCI rev/sub-version: 0x0709)
2422 		 *
2423 		 * These controllers are really messed-up.
2424 		 *
2425 		 * 1. Their bulk RX endpoint will never report any data unless
2426 		 *    the device was suspended at least once (yes, really).
2427 		 * 2. They will not wakeup when autosuspended and receiving data
2428 		 *    on their bulk RX endpoint from e.g. a keyboard or mouse
2429 		 *    (IOW remote-wakeup support is broken for the bulk endpoint).
2430 		 *
2431 		 * To fix 1. enable runtime-suspend, force-suspend the
2432 		 * HCI and then wake-it up by disabling runtime-suspend.
2433 		 *
2434 		 * To fix 2. clear the HCI's can_wake flag, this way the HCI
2435 		 * will still be autosuspended when it is not open.
2436 		 *
2437 		 * --
2438 		 *
2439 		 * Because these are widespread problems we prefer generic solutions; so
2440 		 * apply this initialization quirk to every controller that gets here,
2441 		 * it should be harmless. The alternative is to not work at all.
2442 		 */
2443 		pm_runtime_allow(&data->udev->dev);
2444 
2445 		ret = pm_runtime_suspend(&data->udev->dev);
2446 		if (ret >= 0)
2447 			msleep(200);
2448 		else
2449 			bt_dev_warn(hdev, "CSR: Couldn't suspend the device for our Barrot 8041a02 receive-issue workaround");
2450 
2451 		pm_runtime_forbid(&data->udev->dev);
2452 
2453 		device_set_wakeup_capable(&data->udev->dev, false);
2454 
2455 		/* Re-enable autosuspend if this was requested */
2456 		if (enable_autosuspend)
2457 			usb_enable_autosuspend(data->udev);
2458 	}
2459 
2460 	kfree_skb(skb);
2461 
2462 	return 0;
2463 }
2464 
2465 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
2466 {
2467 	struct sk_buff *skb;
2468 	struct hci_event_hdr *hdr;
2469 	struct hci_ev_cmd_complete *evt;
2470 
2471 	skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
2472 	if (!skb)
2473 		return -ENOMEM;
2474 
2475 	hdr = skb_put(skb, sizeof(*hdr));
2476 	hdr->evt = HCI_EV_CMD_COMPLETE;
2477 	hdr->plen = sizeof(*evt) + 1;
2478 
2479 	evt = skb_put(skb, sizeof(*evt));
2480 	evt->ncmd = 0x01;
2481 	evt->opcode = cpu_to_le16(opcode);
2482 
2483 	skb_put_u8(skb, 0x00);
2484 
2485 	hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2486 
2487 	return hci_recv_frame(hdev, skb);
2488 }
2489 
2490 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
2491 				 int count)
2492 {
2493 	struct hci_dev *hdev = data->hdev;
2494 
2495 	/* When the device is in bootloader mode, then it can send
2496 	 * events via the bulk endpoint. These events are treated the
2497 	 * same way as the ones received from the interrupt endpoint.
2498 	 */
2499 	if (btintel_test_flag(hdev, INTEL_BOOTLOADER))
2500 		return btusb_recv_intr(data, buffer, count);
2501 
2502 	return btusb_recv_bulk(data, buffer, count);
2503 }
2504 
2505 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
2506 {
2507 	struct urb *urb;
2508 
2509 	BT_DBG("%s", hdev->name);
2510 
2511 	switch (hci_skb_pkt_type(skb)) {
2512 	case HCI_COMMAND_PKT:
2513 		if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
2514 			struct hci_command_hdr *cmd = (void *)skb->data;
2515 			__u16 opcode = le16_to_cpu(cmd->opcode);
2516 
2517 			/* When in bootloader mode and the command 0xfc09
2518 			 * is received, it needs to be send down the
2519 			 * bulk endpoint. So allocate a bulk URB instead.
2520 			 */
2521 			if (opcode == 0xfc09)
2522 				urb = alloc_bulk_urb(hdev, skb);
2523 			else
2524 				urb = alloc_ctrl_urb(hdev, skb);
2525 
2526 			/* When the 0xfc01 command is issued to boot into
2527 			 * the operational firmware, it will actually not
2528 			 * send a command complete event. To keep the flow
2529 			 * control working inject that event here.
2530 			 */
2531 			if (opcode == 0xfc01)
2532 				inject_cmd_complete(hdev, opcode);
2533 		} else {
2534 			urb = alloc_ctrl_urb(hdev, skb);
2535 		}
2536 		if (IS_ERR(urb))
2537 			return PTR_ERR(urb);
2538 
2539 		hdev->stat.cmd_tx++;
2540 		return submit_or_queue_tx_urb(hdev, urb);
2541 
2542 	case HCI_ACLDATA_PKT:
2543 		urb = alloc_bulk_urb(hdev, skb);
2544 		if (IS_ERR(urb))
2545 			return PTR_ERR(urb);
2546 
2547 		hdev->stat.acl_tx++;
2548 		return submit_or_queue_tx_urb(hdev, urb);
2549 
2550 	case HCI_SCODATA_PKT:
2551 		if (hci_conn_num(hdev, SCO_LINK) < 1)
2552 			return -ENODEV;
2553 
2554 		urb = alloc_isoc_urb(hdev, skb);
2555 		if (IS_ERR(urb))
2556 			return PTR_ERR(urb);
2557 
2558 		hdev->stat.sco_tx++;
2559 		return submit_tx_urb(hdev, urb);
2560 
2561 	case HCI_ISODATA_PKT:
2562 		urb = alloc_bulk_urb(hdev, skb);
2563 		if (IS_ERR(urb))
2564 			return PTR_ERR(urb);
2565 
2566 		return submit_or_queue_tx_urb(hdev, urb);
2567 	}
2568 
2569 	return -EILSEQ;
2570 }
2571 
2572 static int btusb_setup_realtek(struct hci_dev *hdev)
2573 {
2574 	struct btusb_data *data = hci_get_drvdata(hdev);
2575 	int ret;
2576 
2577 	ret = btrtl_setup_realtek(hdev);
2578 
2579 	if (btrealtek_test_flag(data->hdev, REALTEK_ALT6_CONTINUOUS_TX_CHIP))
2580 		set_bit(BTUSB_ALT6_CONTINUOUS_TX, &data->flags);
2581 
2582 	return ret;
2583 }
2584 
2585 static int btusb_recv_event_realtek(struct hci_dev *hdev, struct sk_buff *skb)
2586 {
2587 	if (skb->data[0] == HCI_VENDOR_PKT && skb->data[2] == RTK_SUB_EVENT_CODE_COREDUMP) {
2588 		struct rtk_dev_coredump_hdr hdr = {
2589 			.code = RTK_DEVCOREDUMP_CODE_MEMDUMP,
2590 		};
2591 
2592 		bt_dev_dbg(hdev, "RTL: received coredump vendor evt, len %u",
2593 			skb->len);
2594 
2595 		btusb_rtl_alloc_devcoredump(hdev, &hdr, skb->data, skb->len);
2596 		kfree_skb(skb);
2597 
2598 		return 0;
2599 	}
2600 
2601 	return hci_recv_frame(hdev, skb);
2602 }
2603 
2604 /* UHW CR mapping */
2605 #define MTK_BT_MISC		0x70002510
2606 #define MTK_BT_SUBSYS_RST	0x70002610
2607 #define MTK_UDMA_INT_STA_BT	0x74000024
2608 #define MTK_UDMA_INT_STA_BT1	0x74000308
2609 #define MTK_BT_WDT_STATUS	0x740003A0
2610 #define MTK_EP_RST_OPT		0x74011890
2611 #define MTK_EP_RST_IN_OUT_OPT	0x00010001
2612 #define MTK_BT_RST_DONE		0x00000100
2613 #define MTK_BT_RESET_REG_CONNV3	0x70028610
2614 #define MTK_BT_READ_DEV_ID	0x70010200
2615 
2616 
2617 static void btusb_mtk_wmt_recv(struct urb *urb)
2618 {
2619 	struct hci_dev *hdev = urb->context;
2620 	struct btusb_data *data = hci_get_drvdata(hdev);
2621 	struct sk_buff *skb;
2622 	int err;
2623 
2624 	if (urb->status == 0 && urb->actual_length > 0) {
2625 		hdev->stat.byte_rx += urb->actual_length;
2626 
2627 		/* WMT event shouldn't be fragmented and the size should be
2628 		 * less than HCI_WMT_MAX_EVENT_SIZE.
2629 		 */
2630 		skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
2631 		if (!skb) {
2632 			hdev->stat.err_rx++;
2633 			kfree(urb->setup_packet);
2634 			return;
2635 		}
2636 
2637 		hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2638 		skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
2639 
2640 		/* When someone waits for the WMT event, the skb is being cloned
2641 		 * and being processed the events from there then.
2642 		 */
2643 		if (test_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags)) {
2644 			data->evt_skb = skb_clone(skb, GFP_ATOMIC);
2645 			if (!data->evt_skb) {
2646 				kfree_skb(skb);
2647 				kfree(urb->setup_packet);
2648 				return;
2649 			}
2650 		}
2651 
2652 		err = hci_recv_frame(hdev, skb);
2653 		if (err < 0) {
2654 			kfree_skb(data->evt_skb);
2655 			data->evt_skb = NULL;
2656 			kfree(urb->setup_packet);
2657 			return;
2658 		}
2659 
2660 		if (test_and_clear_bit(BTUSB_TX_WAIT_VND_EVT,
2661 				       &data->flags)) {
2662 			/* Barrier to sync with other CPUs */
2663 			smp_mb__after_atomic();
2664 			wake_up_bit(&data->flags,
2665 				    BTUSB_TX_WAIT_VND_EVT);
2666 		}
2667 		kfree(urb->setup_packet);
2668 		return;
2669 	} else if (urb->status == -ENOENT) {
2670 		/* Avoid suspend failed when usb_kill_urb */
2671 		return;
2672 	}
2673 
2674 	usb_mark_last_busy(data->udev);
2675 
2676 	/* The URB complete handler is still called with urb->actual_length = 0
2677 	 * when the event is not available, so we should keep re-submitting
2678 	 * URB until WMT event returns, Also, It's necessary to wait some time
2679 	 * between the two consecutive control URBs to relax the target device
2680 	 * to generate the event. Otherwise, the WMT event cannot return from
2681 	 * the device successfully.
2682 	 */
2683 	udelay(500);
2684 
2685 	usb_anchor_urb(urb, &data->ctrl_anchor);
2686 	err = usb_submit_urb(urb, GFP_ATOMIC);
2687 	if (err < 0) {
2688 		kfree(urb->setup_packet);
2689 		/* -EPERM: urb is being killed;
2690 		 * -ENODEV: device got disconnected
2691 		 */
2692 		if (err != -EPERM && err != -ENODEV)
2693 			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
2694 				   urb, -err);
2695 		usb_unanchor_urb(urb);
2696 	}
2697 }
2698 
2699 static int btusb_mtk_submit_wmt_recv_urb(struct hci_dev *hdev)
2700 {
2701 	struct btusb_data *data = hci_get_drvdata(hdev);
2702 	struct usb_ctrlrequest *dr;
2703 	unsigned char *buf;
2704 	int err, size = 64;
2705 	unsigned int pipe;
2706 	struct urb *urb;
2707 
2708 	urb = usb_alloc_urb(0, GFP_KERNEL);
2709 	if (!urb)
2710 		return -ENOMEM;
2711 
2712 	dr = kmalloc(sizeof(*dr), GFP_KERNEL);
2713 	if (!dr) {
2714 		usb_free_urb(urb);
2715 		return -ENOMEM;
2716 	}
2717 
2718 	dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
2719 	dr->bRequest     = 1;
2720 	dr->wIndex       = cpu_to_le16(0);
2721 	dr->wValue       = cpu_to_le16(48);
2722 	dr->wLength      = cpu_to_le16(size);
2723 
2724 	buf = kmalloc(size, GFP_KERNEL);
2725 	if (!buf) {
2726 		kfree(dr);
2727 		usb_free_urb(urb);
2728 		return -ENOMEM;
2729 	}
2730 
2731 	pipe = usb_rcvctrlpipe(data->udev, 0);
2732 
2733 	usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
2734 			     buf, size, btusb_mtk_wmt_recv, hdev);
2735 
2736 	urb->transfer_flags |= URB_FREE_BUFFER;
2737 
2738 	usb_anchor_urb(urb, &data->ctrl_anchor);
2739 	err = usb_submit_urb(urb, GFP_KERNEL);
2740 	if (err < 0) {
2741 		if (err != -EPERM && err != -ENODEV)
2742 			bt_dev_err(hdev, "urb %p submission failed (%d)",
2743 				   urb, -err);
2744 		usb_unanchor_urb(urb);
2745 	}
2746 
2747 	usb_free_urb(urb);
2748 
2749 	return err;
2750 }
2751 
2752 static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
2753 				  struct btmtk_hci_wmt_params *wmt_params)
2754 {
2755 	struct btusb_data *data = hci_get_drvdata(hdev);
2756 	struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
2757 	u32 hlen, status = BTMTK_WMT_INVALID;
2758 	struct btmtk_hci_wmt_evt *wmt_evt;
2759 	struct btmtk_hci_wmt_cmd *wc;
2760 	struct btmtk_wmt_hdr *hdr;
2761 	int err;
2762 
2763 	/* Send the WMT command and wait until the WMT event returns */
2764 	hlen = sizeof(*hdr) + wmt_params->dlen;
2765 	if (hlen > 255)
2766 		return -EINVAL;
2767 
2768 	wc = kzalloc(hlen, GFP_KERNEL);
2769 	if (!wc)
2770 		return -ENOMEM;
2771 
2772 	hdr = &wc->hdr;
2773 	hdr->dir = 1;
2774 	hdr->op = wmt_params->op;
2775 	hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
2776 	hdr->flag = wmt_params->flag;
2777 	memcpy(wc->data, wmt_params->data, wmt_params->dlen);
2778 
2779 	set_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2780 
2781 	/* WMT cmd/event doesn't follow up the generic HCI cmd/event handling,
2782 	 * it needs constantly polling control pipe until the host received the
2783 	 * WMT event, thus, we should require to specifically acquire PM counter
2784 	 * on the USB to prevent the interface from entering auto suspended
2785 	 * while WMT cmd/event in progress.
2786 	 */
2787 	err = usb_autopm_get_interface(data->intf);
2788 	if (err < 0)
2789 		goto err_free_wc;
2790 
2791 	err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
2792 
2793 	if (err < 0) {
2794 		clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2795 		usb_autopm_put_interface(data->intf);
2796 		goto err_free_wc;
2797 	}
2798 
2799 	/* Submit control IN URB on demand to process the WMT event */
2800 	err = btusb_mtk_submit_wmt_recv_urb(hdev);
2801 
2802 	usb_autopm_put_interface(data->intf);
2803 
2804 	if (err < 0)
2805 		goto err_free_wc;
2806 
2807 	/* The vendor specific WMT commands are all answered by a vendor
2808 	 * specific event and will have the Command Status or Command
2809 	 * Complete as with usual HCI command flow control.
2810 	 *
2811 	 * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
2812 	 * state to be cleared. The driver specific event receive routine
2813 	 * will clear that state and with that indicate completion of the
2814 	 * WMT command.
2815 	 */
2816 	err = wait_on_bit_timeout(&data->flags, BTUSB_TX_WAIT_VND_EVT,
2817 				  TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
2818 	if (err == -EINTR) {
2819 		bt_dev_err(hdev, "Execution of wmt command interrupted");
2820 		clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2821 		goto err_free_wc;
2822 	}
2823 
2824 	if (err) {
2825 		bt_dev_err(hdev, "Execution of wmt command timed out");
2826 		clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2827 		err = -ETIMEDOUT;
2828 		goto err_free_wc;
2829 	}
2830 
2831 	if (data->evt_skb == NULL)
2832 		goto err_free_wc;
2833 
2834 	/* Parse and handle the return WMT event */
2835 	wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
2836 	if (wmt_evt->whdr.op != hdr->op) {
2837 		bt_dev_err(hdev, "Wrong op received %d expected %d",
2838 			   wmt_evt->whdr.op, hdr->op);
2839 		err = -EIO;
2840 		goto err_free_skb;
2841 	}
2842 
2843 	switch (wmt_evt->whdr.op) {
2844 	case BTMTK_WMT_SEMAPHORE:
2845 		if (wmt_evt->whdr.flag == 2)
2846 			status = BTMTK_WMT_PATCH_UNDONE;
2847 		else
2848 			status = BTMTK_WMT_PATCH_DONE;
2849 		break;
2850 	case BTMTK_WMT_FUNC_CTRL:
2851 		wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
2852 		if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
2853 			status = BTMTK_WMT_ON_DONE;
2854 		else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
2855 			status = BTMTK_WMT_ON_PROGRESS;
2856 		else
2857 			status = BTMTK_WMT_ON_UNDONE;
2858 		break;
2859 	case BTMTK_WMT_PATCH_DWNLD:
2860 		if (wmt_evt->whdr.flag == 2)
2861 			status = BTMTK_WMT_PATCH_DONE;
2862 		else if (wmt_evt->whdr.flag == 1)
2863 			status = BTMTK_WMT_PATCH_PROGRESS;
2864 		else
2865 			status = BTMTK_WMT_PATCH_UNDONE;
2866 		break;
2867 	}
2868 
2869 	if (wmt_params->status)
2870 		*wmt_params->status = status;
2871 
2872 err_free_skb:
2873 	kfree_skb(data->evt_skb);
2874 	data->evt_skb = NULL;
2875 err_free_wc:
2876 	kfree(wc);
2877 	return err;
2878 }
2879 
2880 static int btusb_mtk_func_query(struct hci_dev *hdev)
2881 {
2882 	struct btmtk_hci_wmt_params wmt_params;
2883 	int status, err;
2884 	u8 param = 0;
2885 
2886 	/* Query whether the function is enabled */
2887 	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2888 	wmt_params.flag = 4;
2889 	wmt_params.dlen = sizeof(param);
2890 	wmt_params.data = &param;
2891 	wmt_params.status = &status;
2892 
2893 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2894 	if (err < 0) {
2895 		bt_dev_err(hdev, "Failed to query function status (%d)", err);
2896 		return err;
2897 	}
2898 
2899 	return status;
2900 }
2901 
2902 static int btusb_mtk_uhw_reg_write(struct btusb_data *data, u32 reg, u32 val)
2903 {
2904 	struct hci_dev *hdev = data->hdev;
2905 	int pipe, err;
2906 	void *buf;
2907 
2908 	buf = kzalloc(4, GFP_KERNEL);
2909 	if (!buf)
2910 		return -ENOMEM;
2911 
2912 	put_unaligned_le32(val, buf);
2913 
2914 	pipe = usb_sndctrlpipe(data->udev, 0);
2915 	err = usb_control_msg(data->udev, pipe, 0x02,
2916 			      0x5E,
2917 			      reg >> 16, reg & 0xffff,
2918 			      buf, 4, USB_CTRL_SET_TIMEOUT);
2919 	if (err < 0) {
2920 		bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
2921 		goto err_free_buf;
2922 	}
2923 
2924 err_free_buf:
2925 	kfree(buf);
2926 
2927 	return err;
2928 }
2929 
2930 static int btusb_mtk_uhw_reg_read(struct btusb_data *data, u32 reg, u32 *val)
2931 {
2932 	struct hci_dev *hdev = data->hdev;
2933 	int pipe, err;
2934 	void *buf;
2935 
2936 	buf = kzalloc(4, GFP_KERNEL);
2937 	if (!buf)
2938 		return -ENOMEM;
2939 
2940 	pipe = usb_rcvctrlpipe(data->udev, 0);
2941 	err = usb_control_msg(data->udev, pipe, 0x01,
2942 			      0xDE,
2943 			      reg >> 16, reg & 0xffff,
2944 			      buf, 4, USB_CTRL_SET_TIMEOUT);
2945 	if (err < 0) {
2946 		bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
2947 		goto err_free_buf;
2948 	}
2949 
2950 	*val = get_unaligned_le32(buf);
2951 	bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
2952 
2953 err_free_buf:
2954 	kfree(buf);
2955 
2956 	return err;
2957 }
2958 
2959 static int btusb_mtk_reg_read(struct btusb_data *data, u32 reg, u32 *val)
2960 {
2961 	int pipe, err, size = sizeof(u32);
2962 	void *buf;
2963 
2964 	buf = kzalloc(size, GFP_KERNEL);
2965 	if (!buf)
2966 		return -ENOMEM;
2967 
2968 	pipe = usb_rcvctrlpipe(data->udev, 0);
2969 	err = usb_control_msg(data->udev, pipe, 0x63,
2970 			      USB_TYPE_VENDOR | USB_DIR_IN,
2971 			      reg >> 16, reg & 0xffff,
2972 			      buf, size, USB_CTRL_SET_TIMEOUT);
2973 	if (err < 0)
2974 		goto err_free_buf;
2975 
2976 	*val = get_unaligned_le32(buf);
2977 
2978 err_free_buf:
2979 	kfree(buf);
2980 
2981 	return err;
2982 }
2983 
2984 static int btusb_mtk_id_get(struct btusb_data *data, u32 reg, u32 *id)
2985 {
2986 	return btusb_mtk_reg_read(data, reg, id);
2987 }
2988 
2989 static u32 btusb_mtk_reset_done(struct hci_dev *hdev)
2990 {
2991 	struct btusb_data *data = hci_get_drvdata(hdev);
2992 	u32 val = 0;
2993 
2994 	btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val);
2995 
2996 	return val & MTK_BT_RST_DONE;
2997 }
2998 
2999 static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
3000 {
3001 	struct btusb_data *data = hci_get_drvdata(hdev);
3002 	struct btmediatek_data *mediatek;
3003 	u32 val;
3004 	int err;
3005 
3006 	/* It's MediaTek specific bluetooth reset mechanism via USB */
3007 	if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
3008 		bt_dev_err(hdev, "last reset failed? Not resetting again");
3009 		return -EBUSY;
3010 	}
3011 
3012 	err = usb_autopm_get_interface(data->intf);
3013 	if (err < 0)
3014 		return err;
3015 
3016 	btusb_stop_traffic(data);
3017 	usb_kill_anchored_urbs(&data->tx_anchor);
3018 	mediatek = hci_get_priv(hdev);
3019 
3020 	if (mediatek->dev_id == 0x7925) {
3021 		btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
3022 		val |= (1 << 5);
3023 		btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
3024 		btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
3025 		val &= 0xFFFF00FF;
3026 		val |= (1 << 13);
3027 		btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
3028 		btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001);
3029 		btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
3030 		val |= (1 << 0);
3031 		btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
3032 		btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
3033 		btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
3034 		btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
3035 		btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
3036 		msleep(100);
3037 	} else {
3038 		/* It's Device EndPoint Reset Option Register */
3039 		bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
3040 		btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
3041 		btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val);
3042 
3043 		/* Reset the bluetooth chip via USB interface. */
3044 		btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1);
3045 		btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
3046 		btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
3047 		btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
3048 		btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
3049 		/* MT7921 need to delay 20ms between toggle reset bit */
3050 		msleep(20);
3051 		btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
3052 		btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
3053 	}
3054 
3055 	err = readx_poll_timeout(btusb_mtk_reset_done, hdev, val,
3056 				 val & MTK_BT_RST_DONE, 20000, 1000000);
3057 	if (err < 0)
3058 		bt_dev_err(hdev, "Reset timeout");
3059 
3060 	btusb_mtk_id_get(data, 0x70010200, &val);
3061 	if (!val)
3062 		bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
3063 
3064 	usb_queue_reset_device(data->intf);
3065 
3066 	clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags);
3067 
3068 	return err;
3069 }
3070 
3071 static int btusb_mtk_setup(struct hci_dev *hdev)
3072 {
3073 	struct btusb_data *data = hci_get_drvdata(hdev);
3074 	struct btmtk_hci_wmt_params wmt_params;
3075 	ktime_t calltime, delta, rettime;
3076 	struct btmtk_tci_sleep tci_sleep;
3077 	unsigned long long duration;
3078 	struct sk_buff *skb;
3079 	const char *fwname;
3080 	int err, status;
3081 	u32 dev_id = 0;
3082 	char fw_bin_name[64];
3083 	u32 fw_version = 0;
3084 	u8 param;
3085 	struct btmediatek_data *mediatek;
3086 
3087 	calltime = ktime_get();
3088 
3089 	err = btusb_mtk_id_get(data, 0x80000008, &dev_id);
3090 	if (err < 0) {
3091 		bt_dev_err(hdev, "Failed to get device id (%d)", err);
3092 		return err;
3093 	}
3094 
3095 	if (!dev_id || dev_id != 0x7663) {
3096 		err = btusb_mtk_id_get(data, 0x70010200, &dev_id);
3097 		if (err < 0) {
3098 			bt_dev_err(hdev, "Failed to get device id (%d)", err);
3099 			return err;
3100 		}
3101 		err = btusb_mtk_id_get(data, 0x80021004, &fw_version);
3102 		if (err < 0) {
3103 			bt_dev_err(hdev, "Failed to get fw version (%d)", err);
3104 			return err;
3105 		}
3106 	}
3107 
3108 	mediatek = hci_get_priv(hdev);
3109 	mediatek->dev_id = dev_id;
3110 	mediatek->reset_sync = btusb_mtk_reset;
3111 
3112 	err = btmtk_register_coredump(hdev, btusb_driver.name, fw_version);
3113 	if (err < 0)
3114 		bt_dev_err(hdev, "Failed to register coredump (%d)", err);
3115 
3116 	switch (dev_id) {
3117 	case 0x7663:
3118 		fwname = FIRMWARE_MT7663;
3119 		break;
3120 	case 0x7668:
3121 		fwname = FIRMWARE_MT7668;
3122 		break;
3123 	case 0x7922:
3124 	case 0x7961:
3125 	case 0x7925:
3126 		if (dev_id == 0x7925)
3127 			snprintf(fw_bin_name, sizeof(fw_bin_name),
3128 				 "mediatek/mt%04x/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
3129 				 dev_id & 0xffff, dev_id & 0xffff, (fw_version & 0xff) + 1);
3130 		else
3131 			snprintf(fw_bin_name, sizeof(fw_bin_name),
3132 				 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
3133 				 dev_id & 0xffff, (fw_version & 0xff) + 1);
3134 
3135 		err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
3136 						btusb_mtk_hci_wmt_sync);
3137 		if (err < 0) {
3138 			bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
3139 			return err;
3140 		}
3141 
3142 		/* It's Device EndPoint Reset Option Register */
3143 		btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
3144 
3145 		/* Enable Bluetooth protocol */
3146 		param = 1;
3147 		wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3148 		wmt_params.flag = 0;
3149 		wmt_params.dlen = sizeof(param);
3150 		wmt_params.data = &param;
3151 		wmt_params.status = NULL;
3152 
3153 		err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3154 		if (err < 0) {
3155 			bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
3156 			return err;
3157 		}
3158 
3159 		hci_set_msft_opcode(hdev, 0xFD30);
3160 		hci_set_aosp_capable(hdev);
3161 		goto done;
3162 	default:
3163 		bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
3164 			   dev_id);
3165 		return -ENODEV;
3166 	}
3167 
3168 	/* Query whether the firmware is already download */
3169 	wmt_params.op = BTMTK_WMT_SEMAPHORE;
3170 	wmt_params.flag = 1;
3171 	wmt_params.dlen = 0;
3172 	wmt_params.data = NULL;
3173 	wmt_params.status = &status;
3174 
3175 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3176 	if (err < 0) {
3177 		bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
3178 		return err;
3179 	}
3180 
3181 	if (status == BTMTK_WMT_PATCH_DONE) {
3182 		bt_dev_info(hdev, "firmware already downloaded");
3183 		goto ignore_setup_fw;
3184 	}
3185 
3186 	/* Setup a firmware which the device definitely requires */
3187 	err = btmtk_setup_firmware(hdev, fwname,
3188 				   btusb_mtk_hci_wmt_sync);
3189 	if (err < 0)
3190 		return err;
3191 
3192 ignore_setup_fw:
3193 	err = readx_poll_timeout(btusb_mtk_func_query, hdev, status,
3194 				 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
3195 				 2000, 5000000);
3196 	/* -ETIMEDOUT happens */
3197 	if (err < 0)
3198 		return err;
3199 
3200 	/* The other errors happen in btusb_mtk_func_query */
3201 	if (status < 0)
3202 		return status;
3203 
3204 	if (status == BTMTK_WMT_ON_DONE) {
3205 		bt_dev_info(hdev, "function already on");
3206 		goto ignore_func_on;
3207 	}
3208 
3209 	/* Enable Bluetooth protocol */
3210 	param = 1;
3211 	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3212 	wmt_params.flag = 0;
3213 	wmt_params.dlen = sizeof(param);
3214 	wmt_params.data = &param;
3215 	wmt_params.status = NULL;
3216 
3217 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3218 	if (err < 0) {
3219 		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
3220 		return err;
3221 	}
3222 
3223 ignore_func_on:
3224 	/* Apply the low power environment setup */
3225 	tci_sleep.mode = 0x5;
3226 	tci_sleep.duration = cpu_to_le16(0x640);
3227 	tci_sleep.host_duration = cpu_to_le16(0x640);
3228 	tci_sleep.host_wakeup_pin = 0;
3229 	tci_sleep.time_compensation = 0;
3230 
3231 	skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
3232 			     HCI_INIT_TIMEOUT);
3233 	if (IS_ERR(skb)) {
3234 		err = PTR_ERR(skb);
3235 		bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
3236 		return err;
3237 	}
3238 	kfree_skb(skb);
3239 
3240 done:
3241 	rettime = ktime_get();
3242 	delta = ktime_sub(rettime, calltime);
3243 	duration = (unsigned long long)ktime_to_ns(delta) >> 10;
3244 
3245 	bt_dev_info(hdev, "Device setup in %llu usecs", duration);
3246 
3247 	return 0;
3248 }
3249 
3250 static int btusb_mtk_shutdown(struct hci_dev *hdev)
3251 {
3252 	struct btmtk_hci_wmt_params wmt_params;
3253 	u8 param = 0;
3254 	int err;
3255 
3256 	/* Disable the device */
3257 	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3258 	wmt_params.flag = 0;
3259 	wmt_params.dlen = sizeof(param);
3260 	wmt_params.data = &param;
3261 	wmt_params.status = NULL;
3262 
3263 	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3264 	if (err < 0) {
3265 		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
3266 		return err;
3267 	}
3268 
3269 	return 0;
3270 }
3271 
3272 static int btusb_recv_acl_mtk(struct hci_dev *hdev, struct sk_buff *skb)
3273 {
3274 	struct btusb_data *data = hci_get_drvdata(hdev);
3275 	u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
3276 
3277 	switch (handle) {
3278 	case 0xfc6f:		/* Firmware dump from device */
3279 		/* When the firmware hangs, the device can no longer
3280 		 * suspend and thus disable auto-suspend.
3281 		 */
3282 		usb_disable_autosuspend(data->udev);
3283 
3284 		/* We need to forward the diagnostic packet to userspace daemon
3285 		 * for backward compatibility, so we have to clone the packet
3286 		 * extraly for the in-kernel coredump support.
3287 		 */
3288 		if (IS_ENABLED(CONFIG_DEV_COREDUMP)) {
3289 			struct sk_buff *skb_cd = skb_clone(skb, GFP_ATOMIC);
3290 
3291 			if (skb_cd)
3292 				btmtk_process_coredump(hdev, skb_cd);
3293 		}
3294 
3295 		fallthrough;
3296 	case 0x05ff:		/* Firmware debug logging 1 */
3297 	case 0x05fe:		/* Firmware debug logging 2 */
3298 		return hci_recv_diag(hdev, skb);
3299 	}
3300 
3301 	return hci_recv_frame(hdev, skb);
3302 }
3303 
3304 #ifdef CONFIG_PM
3305 /* Configure an out-of-band gpio as wake-up pin, if specified in device tree */
3306 static int marvell_config_oob_wake(struct hci_dev *hdev)
3307 {
3308 	struct sk_buff *skb;
3309 	struct btusb_data *data = hci_get_drvdata(hdev);
3310 	struct device *dev = &data->udev->dev;
3311 	u16 pin, gap, opcode;
3312 	int ret;
3313 	u8 cmd[5];
3314 
3315 	/* Move on if no wakeup pin specified */
3316 	if (of_property_read_u16(dev->of_node, "marvell,wakeup-pin", &pin) ||
3317 	    of_property_read_u16(dev->of_node, "marvell,wakeup-gap-ms", &gap))
3318 		return 0;
3319 
3320 	/* Vendor specific command to configure a GPIO as wake-up pin */
3321 	opcode = hci_opcode_pack(0x3F, 0x59);
3322 	cmd[0] = opcode & 0xFF;
3323 	cmd[1] = opcode >> 8;
3324 	cmd[2] = 2; /* length of parameters that follow */
3325 	cmd[3] = pin;
3326 	cmd[4] = gap; /* time in ms, for which wakeup pin should be asserted */
3327 
3328 	skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
3329 	if (!skb) {
3330 		bt_dev_err(hdev, "%s: No memory", __func__);
3331 		return -ENOMEM;
3332 	}
3333 
3334 	skb_put_data(skb, cmd, sizeof(cmd));
3335 	hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
3336 
3337 	ret = btusb_send_frame(hdev, skb);
3338 	if (ret) {
3339 		bt_dev_err(hdev, "%s: configuration failed", __func__);
3340 		kfree_skb(skb);
3341 		return ret;
3342 	}
3343 
3344 	return 0;
3345 }
3346 #endif
3347 
3348 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
3349 				    const bdaddr_t *bdaddr)
3350 {
3351 	struct sk_buff *skb;
3352 	u8 buf[8];
3353 	long ret;
3354 
3355 	buf[0] = 0xfe;
3356 	buf[1] = sizeof(bdaddr_t);
3357 	memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
3358 
3359 	skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
3360 	if (IS_ERR(skb)) {
3361 		ret = PTR_ERR(skb);
3362 		bt_dev_err(hdev, "changing Marvell device address failed (%ld)",
3363 			   ret);
3364 		return ret;
3365 	}
3366 	kfree_skb(skb);
3367 
3368 	return 0;
3369 }
3370 
3371 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
3372 				    const bdaddr_t *bdaddr)
3373 {
3374 	struct sk_buff *skb;
3375 	u8 buf[10];
3376 	long ret;
3377 
3378 	buf[0] = 0x01;
3379 	buf[1] = 0x01;
3380 	buf[2] = 0x00;
3381 	buf[3] = sizeof(bdaddr_t);
3382 	memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
3383 
3384 	skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
3385 	if (IS_ERR(skb)) {
3386 		ret = PTR_ERR(skb);
3387 		bt_dev_err(hdev, "Change address command failed (%ld)", ret);
3388 		return ret;
3389 	}
3390 	kfree_skb(skb);
3391 
3392 	return 0;
3393 }
3394 
3395 static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev,
3396 				const bdaddr_t *bdaddr)
3397 {
3398 	struct sk_buff *skb;
3399 	u8 buf[6];
3400 	long ret;
3401 
3402 	memcpy(buf, bdaddr, sizeof(bdaddr_t));
3403 
3404 	skb = __hci_cmd_sync_ev(hdev, 0xfc14, sizeof(buf), buf,
3405 				HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
3406 	if (IS_ERR(skb)) {
3407 		ret = PTR_ERR(skb);
3408 		bt_dev_err(hdev, "Change address command failed (%ld)", ret);
3409 		return ret;
3410 	}
3411 	kfree_skb(skb);
3412 
3413 	return 0;
3414 }
3415 
3416 #define QCA_MEMDUMP_ACL_HANDLE 0x2EDD
3417 #define QCA_MEMDUMP_SIZE_MAX  0x100000
3418 #define QCA_MEMDUMP_VSE_CLASS 0x01
3419 #define QCA_MEMDUMP_MSG_TYPE 0x08
3420 #define QCA_MEMDUMP_PKT_SIZE 248
3421 #define QCA_LAST_SEQUENCE_NUM 0xffff
3422 
3423 struct qca_dump_hdr {
3424 	u8 vse_class;
3425 	u8 msg_type;
3426 	__le16 seqno;
3427 	u8 reserved;
3428 	union {
3429 		u8 data[0];
3430 		struct {
3431 			__le32 ram_dump_size;
3432 			u8 data0[0];
3433 		} __packed;
3434 	};
3435 } __packed;
3436 
3437 
3438 static void btusb_dump_hdr_qca(struct hci_dev *hdev, struct sk_buff *skb)
3439 {
3440 	char buf[128];
3441 	struct btusb_data *btdata = hci_get_drvdata(hdev);
3442 
3443 	snprintf(buf, sizeof(buf), "Controller Name: 0x%x\n",
3444 			btdata->qca_dump.controller_id);
3445 	skb_put_data(skb, buf, strlen(buf));
3446 
3447 	snprintf(buf, sizeof(buf), "Firmware Version: 0x%x\n",
3448 			btdata->qca_dump.fw_version);
3449 	skb_put_data(skb, buf, strlen(buf));
3450 
3451 	snprintf(buf, sizeof(buf), "Driver: %s\nVendor: qca\n",
3452 			btusb_driver.name);
3453 	skb_put_data(skb, buf, strlen(buf));
3454 
3455 	snprintf(buf, sizeof(buf), "VID: 0x%x\nPID:0x%x\n",
3456 			btdata->qca_dump.id_vendor, btdata->qca_dump.id_product);
3457 	skb_put_data(skb, buf, strlen(buf));
3458 
3459 	snprintf(buf, sizeof(buf), "Lmp Subversion: 0x%x\n",
3460 			hdev->lmp_subver);
3461 	skb_put_data(skb, buf, strlen(buf));
3462 }
3463 
3464 static void btusb_coredump_qca(struct hci_dev *hdev)
3465 {
3466 	int err;
3467 	static const u8 param[] = { 0x26 };
3468 
3469 	err = __hci_cmd_send(hdev, 0xfc0c, 1, param);
3470 	if (err < 0)
3471 		bt_dev_err(hdev, "%s: triggle crash failed (%d)", __func__, err);
3472 }
3473 
3474 /*
3475  * ==0: not a dump pkt.
3476  * < 0: fails to handle a dump pkt
3477  * > 0: otherwise.
3478  */
3479 static int handle_dump_pkt_qca(struct hci_dev *hdev, struct sk_buff *skb)
3480 {
3481 	int ret = 1;
3482 	u8 pkt_type;
3483 	u8 *sk_ptr;
3484 	unsigned int sk_len;
3485 	u16 seqno;
3486 	u32 dump_size;
3487 
3488 	struct hci_event_hdr *event_hdr;
3489 	struct hci_acl_hdr *acl_hdr;
3490 	struct qca_dump_hdr *dump_hdr;
3491 	struct btusb_data *btdata = hci_get_drvdata(hdev);
3492 	struct usb_device *udev = btdata->udev;
3493 
3494 	pkt_type = hci_skb_pkt_type(skb);
3495 	sk_ptr = skb->data;
3496 	sk_len = skb->len;
3497 
3498 	if (pkt_type == HCI_ACLDATA_PKT) {
3499 		acl_hdr = hci_acl_hdr(skb);
3500 		if (le16_to_cpu(acl_hdr->handle) != QCA_MEMDUMP_ACL_HANDLE)
3501 			return 0;
3502 		sk_ptr += HCI_ACL_HDR_SIZE;
3503 		sk_len -= HCI_ACL_HDR_SIZE;
3504 		event_hdr = (struct hci_event_hdr *)sk_ptr;
3505 	} else {
3506 		event_hdr = hci_event_hdr(skb);
3507 	}
3508 
3509 	if ((event_hdr->evt != HCI_VENDOR_PKT)
3510 		|| (event_hdr->plen != (sk_len - HCI_EVENT_HDR_SIZE)))
3511 		return 0;
3512 
3513 	sk_ptr += HCI_EVENT_HDR_SIZE;
3514 	sk_len -= HCI_EVENT_HDR_SIZE;
3515 
3516 	dump_hdr = (struct qca_dump_hdr *)sk_ptr;
3517 	if ((sk_len < offsetof(struct qca_dump_hdr, data))
3518 		|| (dump_hdr->vse_class != QCA_MEMDUMP_VSE_CLASS)
3519 	    || (dump_hdr->msg_type != QCA_MEMDUMP_MSG_TYPE))
3520 		return 0;
3521 
3522 	/*it is dump pkt now*/
3523 	seqno = le16_to_cpu(dump_hdr->seqno);
3524 	if (seqno == 0) {
3525 		set_bit(BTUSB_HW_SSR_ACTIVE, &btdata->flags);
3526 		dump_size = le32_to_cpu(dump_hdr->ram_dump_size);
3527 		if (!dump_size || (dump_size > QCA_MEMDUMP_SIZE_MAX)) {
3528 			ret = -EILSEQ;
3529 			bt_dev_err(hdev, "Invalid memdump size(%u)",
3530 				   dump_size);
3531 			goto out;
3532 		}
3533 
3534 		ret = hci_devcd_init(hdev, dump_size);
3535 		if (ret < 0) {
3536 			bt_dev_err(hdev, "memdump init error(%d)", ret);
3537 			goto out;
3538 		}
3539 
3540 		btdata->qca_dump.ram_dump_size = dump_size;
3541 		btdata->qca_dump.ram_dump_seqno = 0;
3542 		sk_ptr += offsetof(struct qca_dump_hdr, data0);
3543 		sk_len -= offsetof(struct qca_dump_hdr, data0);
3544 
3545 		usb_disable_autosuspend(udev);
3546 		bt_dev_info(hdev, "%s memdump size(%u)\n",
3547 			    (pkt_type == HCI_ACLDATA_PKT) ? "ACL" : "event",
3548 			    dump_size);
3549 	} else {
3550 		sk_ptr += offsetof(struct qca_dump_hdr, data);
3551 		sk_len -= offsetof(struct qca_dump_hdr, data);
3552 	}
3553 
3554 	if (!btdata->qca_dump.ram_dump_size) {
3555 		ret = -EINVAL;
3556 		bt_dev_err(hdev, "memdump is not active");
3557 		goto out;
3558 	}
3559 
3560 	if ((seqno > btdata->qca_dump.ram_dump_seqno + 1) && (seqno != QCA_LAST_SEQUENCE_NUM)) {
3561 		dump_size = QCA_MEMDUMP_PKT_SIZE * (seqno - btdata->qca_dump.ram_dump_seqno - 1);
3562 		hci_devcd_append_pattern(hdev, 0x0, dump_size);
3563 		bt_dev_err(hdev,
3564 			   "expected memdump seqno(%u) is not received(%u)\n",
3565 			   btdata->qca_dump.ram_dump_seqno, seqno);
3566 		btdata->qca_dump.ram_dump_seqno = seqno;
3567 		kfree_skb(skb);
3568 		return ret;
3569 	}
3570 
3571 	skb_pull(skb, skb->len - sk_len);
3572 	hci_devcd_append(hdev, skb);
3573 	btdata->qca_dump.ram_dump_seqno++;
3574 	if (seqno == QCA_LAST_SEQUENCE_NUM) {
3575 		bt_dev_info(hdev,
3576 				"memdump done: pkts(%u), total(%u)\n",
3577 				btdata->qca_dump.ram_dump_seqno, btdata->qca_dump.ram_dump_size);
3578 
3579 		hci_devcd_complete(hdev);
3580 		goto out;
3581 	}
3582 	return ret;
3583 
3584 out:
3585 	if (btdata->qca_dump.ram_dump_size)
3586 		usb_enable_autosuspend(udev);
3587 	btdata->qca_dump.ram_dump_size = 0;
3588 	btdata->qca_dump.ram_dump_seqno = 0;
3589 	clear_bit(BTUSB_HW_SSR_ACTIVE, &btdata->flags);
3590 
3591 	if (ret < 0)
3592 		kfree_skb(skb);
3593 	return ret;
3594 }
3595 
3596 static int btusb_recv_acl_qca(struct hci_dev *hdev, struct sk_buff *skb)
3597 {
3598 	if (handle_dump_pkt_qca(hdev, skb))
3599 		return 0;
3600 	return hci_recv_frame(hdev, skb);
3601 }
3602 
3603 static int btusb_recv_evt_qca(struct hci_dev *hdev, struct sk_buff *skb)
3604 {
3605 	if (handle_dump_pkt_qca(hdev, skb))
3606 		return 0;
3607 	return hci_recv_frame(hdev, skb);
3608 }
3609 
3610 
3611 #define QCA_DFU_PACKET_LEN	4096
3612 
3613 #define QCA_GET_TARGET_VERSION	0x09
3614 #define QCA_CHECK_STATUS	0x05
3615 #define QCA_DFU_DOWNLOAD	0x01
3616 
3617 #define QCA_SYSCFG_UPDATED	0x40
3618 #define QCA_PATCH_UPDATED	0x80
3619 #define QCA_DFU_TIMEOUT		3000
3620 #define QCA_FLAG_MULTI_NVM      0x80
3621 #define QCA_BT_RESET_WAIT_MS    100
3622 
3623 #define WCN6855_2_0_RAM_VERSION_GF 0x400c1200
3624 #define WCN6855_2_1_RAM_VERSION_GF 0x400c1211
3625 
3626 struct qca_version {
3627 	__le32	rom_version;
3628 	__le32	patch_version;
3629 	__le32	ram_version;
3630 	__u8	chip_id;
3631 	__u8	platform_id;
3632 	__le16	flag;
3633 	__u8	reserved[4];
3634 } __packed;
3635 
3636 struct qca_rampatch_version {
3637 	__le16	rom_version_high;
3638 	__le16  rom_version_low;
3639 	__le16	patch_version;
3640 } __packed;
3641 
3642 struct qca_device_info {
3643 	u32	rom_version;
3644 	u8	rampatch_hdr;	/* length of header in rampatch */
3645 	u8	nvm_hdr;	/* length of header in NVM */
3646 	u8	ver_offset;	/* offset of version structure in rampatch */
3647 };
3648 
3649 static const struct qca_device_info qca_devices_table[] = {
3650 	{ 0x00000100, 20, 4,  8 }, /* Rome 1.0 */
3651 	{ 0x00000101, 20, 4,  8 }, /* Rome 1.1 */
3652 	{ 0x00000200, 28, 4, 16 }, /* Rome 2.0 */
3653 	{ 0x00000201, 28, 4, 16 }, /* Rome 2.1 */
3654 	{ 0x00000300, 28, 4, 16 }, /* Rome 3.0 */
3655 	{ 0x00000302, 28, 4, 16 }, /* Rome 3.2 */
3656 	{ 0x00130100, 40, 4, 16 }, /* WCN6855 1.0 */
3657 	{ 0x00130200, 40, 4, 16 }, /* WCN6855 2.0 */
3658 	{ 0x00130201, 40, 4, 16 }, /* WCN6855 2.1 */
3659 	{ 0x00190200, 40, 4, 16 }, /* WCN785x 2.0 */
3660 };
3661 
3662 static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 request,
3663 				     void *data, u16 size)
3664 {
3665 	int pipe, err;
3666 	u8 *buf;
3667 
3668 	buf = kmalloc(size, GFP_KERNEL);
3669 	if (!buf)
3670 		return -ENOMEM;
3671 
3672 	/* Found some of USB hosts have IOT issues with ours so that we should
3673 	 * not wait until HCI layer is ready.
3674 	 */
3675 	pipe = usb_rcvctrlpipe(udev, 0);
3676 	err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
3677 			      0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3678 	if (err < 0) {
3679 		dev_err(&udev->dev, "Failed to access otp area (%d)", err);
3680 		goto done;
3681 	}
3682 
3683 	memcpy(data, buf, size);
3684 
3685 done:
3686 	kfree(buf);
3687 
3688 	return err;
3689 }
3690 
3691 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
3692 				       const struct firmware *firmware,
3693 				       size_t hdr_size)
3694 {
3695 	struct btusb_data *btdata = hci_get_drvdata(hdev);
3696 	struct usb_device *udev = btdata->udev;
3697 	size_t count, size, sent = 0;
3698 	int pipe, len, err;
3699 	u8 *buf;
3700 
3701 	buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
3702 	if (!buf)
3703 		return -ENOMEM;
3704 
3705 	count = firmware->size;
3706 
3707 	size = min_t(size_t, count, hdr_size);
3708 	memcpy(buf, firmware->data, size);
3709 
3710 	/* USB patches should go down to controller through USB path
3711 	 * because binary format fits to go down through USB channel.
3712 	 * USB control path is for patching headers and USB bulk is for
3713 	 * patch body.
3714 	 */
3715 	pipe = usb_sndctrlpipe(udev, 0);
3716 	err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
3717 			      0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3718 	if (err < 0) {
3719 		bt_dev_err(hdev, "Failed to send headers (%d)", err);
3720 		goto done;
3721 	}
3722 
3723 	sent += size;
3724 	count -= size;
3725 
3726 	/* ep2 need time to switch from function acl to function dfu,
3727 	 * so we add 20ms delay here.
3728 	 */
3729 	msleep(20);
3730 
3731 	while (count) {
3732 		size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
3733 
3734 		memcpy(buf, firmware->data + sent, size);
3735 
3736 		pipe = usb_sndbulkpipe(udev, 0x02);
3737 		err = usb_bulk_msg(udev, pipe, buf, size, &len,
3738 				   QCA_DFU_TIMEOUT);
3739 		if (err < 0) {
3740 			bt_dev_err(hdev, "Failed to send body at %zd of %zd (%d)",
3741 				   sent, firmware->size, err);
3742 			break;
3743 		}
3744 
3745 		if (size != len) {
3746 			bt_dev_err(hdev, "Failed to get bulk buffer");
3747 			err = -EILSEQ;
3748 			break;
3749 		}
3750 
3751 		sent  += size;
3752 		count -= size;
3753 	}
3754 
3755 done:
3756 	kfree(buf);
3757 	return err;
3758 }
3759 
3760 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
3761 					 struct qca_version *ver,
3762 					 const struct qca_device_info *info)
3763 {
3764 	struct qca_rampatch_version *rver;
3765 	const struct firmware *fw;
3766 	u32 ver_rom, ver_patch, rver_rom;
3767 	u16 rver_rom_low, rver_rom_high, rver_patch;
3768 	char fwname[64];
3769 	int err;
3770 
3771 	ver_rom = le32_to_cpu(ver->rom_version);
3772 	ver_patch = le32_to_cpu(ver->patch_version);
3773 
3774 	snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
3775 
3776 	err = request_firmware(&fw, fwname, &hdev->dev);
3777 	if (err) {
3778 		bt_dev_err(hdev, "failed to request rampatch file: %s (%d)",
3779 			   fwname, err);
3780 		return err;
3781 	}
3782 
3783 	bt_dev_info(hdev, "using rampatch file: %s", fwname);
3784 
3785 	rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
3786 	rver_rom_low = le16_to_cpu(rver->rom_version_low);
3787 	rver_patch = le16_to_cpu(rver->patch_version);
3788 
3789 	if (ver_rom & ~0xffffU) {
3790 		rver_rom_high = le16_to_cpu(rver->rom_version_high);
3791 		rver_rom = rver_rom_high << 16 | rver_rom_low;
3792 	} else {
3793 		rver_rom = rver_rom_low;
3794 	}
3795 
3796 	bt_dev_info(hdev, "QCA: patch rome 0x%x build 0x%x, "
3797 		    "firmware rome 0x%x build 0x%x",
3798 		    rver_rom, rver_patch, ver_rom, ver_patch);
3799 
3800 	if (rver_rom != ver_rom || rver_patch <= ver_patch) {
3801 		bt_dev_err(hdev, "rampatch file version did not match with firmware");
3802 		err = -EINVAL;
3803 		goto done;
3804 	}
3805 
3806 	err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
3807 
3808 done:
3809 	release_firmware(fw);
3810 
3811 	return err;
3812 }
3813 
3814 static void btusb_generate_qca_nvm_name(char *fwname, size_t max_size,
3815 					const struct qca_version *ver)
3816 {
3817 	u32 rom_version = le32_to_cpu(ver->rom_version);
3818 	u16 flag = le16_to_cpu(ver->flag);
3819 
3820 	if (((flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) {
3821 		/* The board_id should be split into two bytes
3822 		 * The 1st byte is chip ID, and the 2nd byte is platform ID
3823 		 * For example, board ID 0x010A, 0x01 is platform ID. 0x0A is chip ID
3824 		 * we have several platforms, and platform IDs are continuously added
3825 		 * Platform ID:
3826 		 * 0x00 is for Mobile
3827 		 * 0x01 is for X86
3828 		 * 0x02 is for Automotive
3829 		 * 0x03 is for Consumer electronic
3830 		 */
3831 		u16 board_id = (ver->chip_id << 8) + ver->platform_id;
3832 		const char *variant;
3833 
3834 		switch (le32_to_cpu(ver->ram_version)) {
3835 		case WCN6855_2_0_RAM_VERSION_GF:
3836 		case WCN6855_2_1_RAM_VERSION_GF:
3837 			variant = "_gf";
3838 			break;
3839 		default:
3840 			variant = "";
3841 			break;
3842 		}
3843 
3844 		if (board_id == 0) {
3845 			snprintf(fwname, max_size, "qca/nvm_usb_%08x%s.bin",
3846 				rom_version, variant);
3847 		} else {
3848 			snprintf(fwname, max_size, "qca/nvm_usb_%08x%s_%04x.bin",
3849 				rom_version, variant, board_id);
3850 		}
3851 	} else {
3852 		snprintf(fwname, max_size, "qca/nvm_usb_%08x.bin",
3853 			rom_version);
3854 	}
3855 
3856 }
3857 
3858 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
3859 				    struct qca_version *ver,
3860 				    const struct qca_device_info *info)
3861 {
3862 	const struct firmware *fw;
3863 	char fwname[64];
3864 	int err;
3865 
3866 	btusb_generate_qca_nvm_name(fwname, sizeof(fwname), ver);
3867 
3868 	err = request_firmware(&fw, fwname, &hdev->dev);
3869 	if (err) {
3870 		bt_dev_err(hdev, "failed to request NVM file: %s (%d)",
3871 			   fwname, err);
3872 		return err;
3873 	}
3874 
3875 	bt_dev_info(hdev, "using NVM file: %s", fwname);
3876 
3877 	err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
3878 
3879 	release_firmware(fw);
3880 
3881 	return err;
3882 }
3883 
3884 /* identify the ROM version and check whether patches are needed */
3885 static bool btusb_qca_need_patch(struct usb_device *udev)
3886 {
3887 	struct qca_version ver;
3888 
3889 	if (btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3890 				      sizeof(ver)) < 0)
3891 		return false;
3892 	/* only low ROM versions need patches */
3893 	return !(le32_to_cpu(ver.rom_version) & ~0xffffU);
3894 }
3895 
3896 static int btusb_setup_qca(struct hci_dev *hdev)
3897 {
3898 	struct btusb_data *btdata = hci_get_drvdata(hdev);
3899 	struct usb_device *udev = btdata->udev;
3900 	const struct qca_device_info *info = NULL;
3901 	struct qca_version ver;
3902 	u32 ver_rom;
3903 	u8 status;
3904 	int i, err;
3905 
3906 	err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3907 					sizeof(ver));
3908 	if (err < 0)
3909 		return err;
3910 
3911 	ver_rom = le32_to_cpu(ver.rom_version);
3912 
3913 	for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
3914 		if (ver_rom == qca_devices_table[i].rom_version)
3915 			info = &qca_devices_table[i];
3916 	}
3917 	if (!info) {
3918 		/* If the rom_version is not matched in the qca_devices_table
3919 		 * and the high ROM version is not zero, we assume this chip no
3920 		 * need to load the rampatch and nvm.
3921 		 */
3922 		if (ver_rom & ~0xffffU)
3923 			return 0;
3924 
3925 		bt_dev_err(hdev, "don't support firmware rome 0x%x", ver_rom);
3926 		return -ENODEV;
3927 	}
3928 
3929 	err = btusb_qca_send_vendor_req(udev, QCA_CHECK_STATUS, &status,
3930 					sizeof(status));
3931 	if (err < 0)
3932 		return err;
3933 
3934 	if (!(status & QCA_PATCH_UPDATED)) {
3935 		err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
3936 		if (err < 0)
3937 			return err;
3938 	}
3939 
3940 	err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3941 					sizeof(ver));
3942 	if (err < 0)
3943 		return err;
3944 
3945 	btdata->qca_dump.fw_version = le32_to_cpu(ver.patch_version);
3946 	btdata->qca_dump.controller_id = le32_to_cpu(ver.rom_version);
3947 
3948 	if (!(status & QCA_SYSCFG_UPDATED)) {
3949 		err = btusb_setup_qca_load_nvm(hdev, &ver, info);
3950 		if (err < 0)
3951 			return err;
3952 
3953 		/* WCN6855 2.1 and later will reset to apply firmware downloaded here, so
3954 		 * wait ~100ms for reset Done then go ahead, otherwise, it maybe
3955 		 * cause potential enable failure.
3956 		 */
3957 		if (info->rom_version >= 0x00130201)
3958 			msleep(QCA_BT_RESET_WAIT_MS);
3959 	}
3960 
3961 	/* Mark HCI_OP_ENHANCED_SETUP_SYNC_CONN as broken as it doesn't seem to
3962 	 * work with the likes of HSP/HFP mSBC.
3963 	 */
3964 	set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &hdev->quirks);
3965 
3966 	return 0;
3967 }
3968 
3969 static inline int __set_diag_interface(struct hci_dev *hdev)
3970 {
3971 	struct btusb_data *data = hci_get_drvdata(hdev);
3972 	struct usb_interface *intf = data->diag;
3973 	int i;
3974 
3975 	if (!data->diag)
3976 		return -ENODEV;
3977 
3978 	data->diag_tx_ep = NULL;
3979 	data->diag_rx_ep = NULL;
3980 
3981 	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3982 		struct usb_endpoint_descriptor *ep_desc;
3983 
3984 		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3985 
3986 		if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3987 			data->diag_tx_ep = ep_desc;
3988 			continue;
3989 		}
3990 
3991 		if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3992 			data->diag_rx_ep = ep_desc;
3993 			continue;
3994 		}
3995 	}
3996 
3997 	if (!data->diag_tx_ep || !data->diag_rx_ep) {
3998 		bt_dev_err(hdev, "invalid diagnostic descriptors");
3999 		return -ENODEV;
4000 	}
4001 
4002 	return 0;
4003 }
4004 
4005 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
4006 {
4007 	struct btusb_data *data = hci_get_drvdata(hdev);
4008 	struct sk_buff *skb;
4009 	struct urb *urb;
4010 	unsigned int pipe;
4011 
4012 	if (!data->diag_tx_ep)
4013 		return ERR_PTR(-ENODEV);
4014 
4015 	urb = usb_alloc_urb(0, GFP_KERNEL);
4016 	if (!urb)
4017 		return ERR_PTR(-ENOMEM);
4018 
4019 	skb = bt_skb_alloc(2, GFP_KERNEL);
4020 	if (!skb) {
4021 		usb_free_urb(urb);
4022 		return ERR_PTR(-ENOMEM);
4023 	}
4024 
4025 	skb_put_u8(skb, 0xf0);
4026 	skb_put_u8(skb, enable);
4027 
4028 	pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
4029 
4030 	usb_fill_bulk_urb(urb, data->udev, pipe,
4031 			  skb->data, skb->len, btusb_tx_complete, skb);
4032 
4033 	skb->dev = (void *)hdev;
4034 
4035 	return urb;
4036 }
4037 
4038 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
4039 {
4040 	struct btusb_data *data = hci_get_drvdata(hdev);
4041 	struct urb *urb;
4042 
4043 	if (!data->diag)
4044 		return -ENODEV;
4045 
4046 	if (!test_bit(HCI_RUNNING, &hdev->flags))
4047 		return -ENETDOWN;
4048 
4049 	urb = alloc_diag_urb(hdev, enable);
4050 	if (IS_ERR(urb))
4051 		return PTR_ERR(urb);
4052 
4053 	return submit_or_queue_tx_urb(hdev, urb);
4054 }
4055 
4056 #ifdef CONFIG_PM
4057 static irqreturn_t btusb_oob_wake_handler(int irq, void *priv)
4058 {
4059 	struct btusb_data *data = priv;
4060 
4061 	pm_wakeup_event(&data->udev->dev, 0);
4062 	pm_system_wakeup();
4063 
4064 	/* Disable only if not already disabled (keep it balanced) */
4065 	if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
4066 		disable_irq_nosync(irq);
4067 		disable_irq_wake(irq);
4068 	}
4069 	return IRQ_HANDLED;
4070 }
4071 
4072 static const struct of_device_id btusb_match_table[] = {
4073 	{ .compatible = "usb1286,204e" },
4074 	{ .compatible = "usbcf3,e300" }, /* QCA6174A */
4075 	{ .compatible = "usb4ca,301a" }, /* QCA6174A (Lite-On) */
4076 	{ }
4077 };
4078 MODULE_DEVICE_TABLE(of, btusb_match_table);
4079 
4080 /* Use an oob wakeup pin? */
4081 static int btusb_config_oob_wake(struct hci_dev *hdev)
4082 {
4083 	struct btusb_data *data = hci_get_drvdata(hdev);
4084 	struct device *dev = &data->udev->dev;
4085 	int irq, ret;
4086 
4087 	clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
4088 
4089 	if (!of_match_device(btusb_match_table, dev))
4090 		return 0;
4091 
4092 	/* Move on if no IRQ specified */
4093 	irq = of_irq_get_byname(dev->of_node, "wakeup");
4094 	if (irq <= 0) {
4095 		bt_dev_dbg(hdev, "%s: no OOB Wakeup IRQ in DT", __func__);
4096 		return 0;
4097 	}
4098 
4099 	irq_set_status_flags(irq, IRQ_NOAUTOEN);
4100 	ret = devm_request_irq(&hdev->dev, irq, btusb_oob_wake_handler,
4101 			       0, "OOB Wake-on-BT", data);
4102 	if (ret) {
4103 		bt_dev_err(hdev, "%s: IRQ request failed", __func__);
4104 		return ret;
4105 	}
4106 
4107 	ret = device_init_wakeup(dev, true);
4108 	if (ret) {
4109 		bt_dev_err(hdev, "%s: failed to init_wakeup", __func__);
4110 		return ret;
4111 	}
4112 
4113 	data->oob_wake_irq = irq;
4114 	bt_dev_info(hdev, "OOB Wake-on-BT configured at IRQ %u", irq);
4115 	return 0;
4116 }
4117 #endif
4118 
4119 static void btusb_check_needs_reset_resume(struct usb_interface *intf)
4120 {
4121 	if (dmi_check_system(btusb_needs_reset_resume_table))
4122 		interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
4123 }
4124 
4125 static bool btusb_wakeup(struct hci_dev *hdev)
4126 {
4127 	struct btusb_data *data = hci_get_drvdata(hdev);
4128 
4129 	return device_may_wakeup(&data->udev->dev);
4130 }
4131 
4132 static int btusb_shutdown_qca(struct hci_dev *hdev)
4133 {
4134 	struct sk_buff *skb;
4135 
4136 	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
4137 	if (IS_ERR(skb)) {
4138 		bt_dev_err(hdev, "HCI reset during shutdown failed");
4139 		return PTR_ERR(skb);
4140 	}
4141 	kfree_skb(skb);
4142 
4143 	return 0;
4144 }
4145 
4146 static ssize_t force_poll_sync_read(struct file *file, char __user *user_buf,
4147 				    size_t count, loff_t *ppos)
4148 {
4149 	struct btusb_data *data = file->private_data;
4150 	char buf[3];
4151 
4152 	buf[0] = data->poll_sync ? 'Y' : 'N';
4153 	buf[1] = '\n';
4154 	buf[2] = '\0';
4155 	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
4156 }
4157 
4158 static ssize_t force_poll_sync_write(struct file *file,
4159 				     const char __user *user_buf,
4160 				     size_t count, loff_t *ppos)
4161 {
4162 	struct btusb_data *data = file->private_data;
4163 	bool enable;
4164 	int err;
4165 
4166 	err = kstrtobool_from_user(user_buf, count, &enable);
4167 	if (err)
4168 		return err;
4169 
4170 	/* Only allow changes while the adapter is down */
4171 	if (test_bit(HCI_UP, &data->hdev->flags))
4172 		return -EPERM;
4173 
4174 	if (data->poll_sync == enable)
4175 		return -EALREADY;
4176 
4177 	data->poll_sync = enable;
4178 
4179 	return count;
4180 }
4181 
4182 static const struct file_operations force_poll_sync_fops = {
4183 	.open		= simple_open,
4184 	.read		= force_poll_sync_read,
4185 	.write		= force_poll_sync_write,
4186 	.llseek		= default_llseek,
4187 };
4188 
4189 static int btusb_probe(struct usb_interface *intf,
4190 		       const struct usb_device_id *id)
4191 {
4192 	struct usb_endpoint_descriptor *ep_desc;
4193 	struct gpio_desc *reset_gpio;
4194 	struct btusb_data *data;
4195 	struct hci_dev *hdev;
4196 	unsigned ifnum_base;
4197 	int i, err, priv_size;
4198 
4199 	BT_DBG("intf %p id %p", intf, id);
4200 
4201 	if ((id->driver_info & BTUSB_IFNUM_2) &&
4202 	    (intf->cur_altsetting->desc.bInterfaceNumber != 0) &&
4203 	    (intf->cur_altsetting->desc.bInterfaceNumber != 2))
4204 		return -ENODEV;
4205 
4206 	ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
4207 
4208 	if (!id->driver_info) {
4209 		const struct usb_device_id *match;
4210 
4211 		match = usb_match_id(intf, quirks_table);
4212 		if (match)
4213 			id = match;
4214 	}
4215 
4216 	if (id->driver_info == BTUSB_IGNORE)
4217 		return -ENODEV;
4218 
4219 	if (id->driver_info & BTUSB_ATH3012) {
4220 		struct usb_device *udev = interface_to_usbdev(intf);
4221 
4222 		/* Old firmware would otherwise let ath3k driver load
4223 		 * patch and sysconfig files
4224 		 */
4225 		if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001 &&
4226 		    !btusb_qca_need_patch(udev))
4227 			return -ENODEV;
4228 	}
4229 
4230 	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
4231 	if (!data)
4232 		return -ENOMEM;
4233 
4234 	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
4235 		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
4236 
4237 		if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
4238 			data->intr_ep = ep_desc;
4239 			continue;
4240 		}
4241 
4242 		if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
4243 			data->bulk_tx_ep = ep_desc;
4244 			continue;
4245 		}
4246 
4247 		if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
4248 			data->bulk_rx_ep = ep_desc;
4249 			continue;
4250 		}
4251 	}
4252 
4253 	if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
4254 		return -ENODEV;
4255 
4256 	if (id->driver_info & BTUSB_AMP) {
4257 		data->cmdreq_type = USB_TYPE_CLASS | 0x01;
4258 		data->cmdreq = 0x2b;
4259 	} else {
4260 		data->cmdreq_type = USB_TYPE_CLASS;
4261 		data->cmdreq = 0x00;
4262 	}
4263 
4264 	data->udev = interface_to_usbdev(intf);
4265 	data->intf = intf;
4266 
4267 	INIT_WORK(&data->work, btusb_work);
4268 	INIT_WORK(&data->waker, btusb_waker);
4269 	INIT_DELAYED_WORK(&data->rx_work, btusb_rx_work);
4270 
4271 	skb_queue_head_init(&data->acl_q);
4272 
4273 	init_usb_anchor(&data->deferred);
4274 	init_usb_anchor(&data->tx_anchor);
4275 	spin_lock_init(&data->txlock);
4276 
4277 	init_usb_anchor(&data->intr_anchor);
4278 	init_usb_anchor(&data->bulk_anchor);
4279 	init_usb_anchor(&data->isoc_anchor);
4280 	init_usb_anchor(&data->diag_anchor);
4281 	init_usb_anchor(&data->ctrl_anchor);
4282 	spin_lock_init(&data->rxlock);
4283 
4284 	priv_size = 0;
4285 
4286 	data->recv_event = hci_recv_frame;
4287 	data->recv_bulk = btusb_recv_bulk;
4288 
4289 	if (id->driver_info & BTUSB_INTEL_COMBINED) {
4290 		/* Allocate extra space for Intel device */
4291 		priv_size += sizeof(struct btintel_data);
4292 
4293 		/* Override the rx handlers */
4294 		data->recv_event = btintel_recv_event;
4295 		data->recv_bulk = btusb_recv_bulk_intel;
4296 	} else if (id->driver_info & BTUSB_REALTEK) {
4297 		/* Allocate extra space for Realtek device */
4298 		priv_size += sizeof(struct btrealtek_data);
4299 
4300 		data->recv_event = btusb_recv_event_realtek;
4301 	} else if (id->driver_info & BTUSB_MEDIATEK) {
4302 		/* Allocate extra space for Mediatek device */
4303 		priv_size += sizeof(struct btmediatek_data);
4304 	}
4305 
4306 	data->recv_acl = hci_recv_frame;
4307 
4308 	hdev = hci_alloc_dev_priv(priv_size);
4309 	if (!hdev)
4310 		return -ENOMEM;
4311 
4312 	hdev->bus = HCI_USB;
4313 	hci_set_drvdata(hdev, data);
4314 
4315 	data->hdev = hdev;
4316 
4317 	SET_HCIDEV_DEV(hdev, &intf->dev);
4318 
4319 	reset_gpio = gpiod_get_optional(&data->udev->dev, "reset",
4320 					GPIOD_OUT_LOW);
4321 	if (IS_ERR(reset_gpio)) {
4322 		err = PTR_ERR(reset_gpio);
4323 		goto out_free_dev;
4324 	} else if (reset_gpio) {
4325 		data->reset_gpio = reset_gpio;
4326 	}
4327 
4328 	hdev->open   = btusb_open;
4329 	hdev->close  = btusb_close;
4330 	hdev->flush  = btusb_flush;
4331 	hdev->send   = btusb_send_frame;
4332 	hdev->notify = btusb_notify;
4333 	hdev->wakeup = btusb_wakeup;
4334 
4335 #ifdef CONFIG_PM
4336 	err = btusb_config_oob_wake(hdev);
4337 	if (err)
4338 		goto out_free_dev;
4339 
4340 	/* Marvell devices may need a specific chip configuration */
4341 	if (id->driver_info & BTUSB_MARVELL && data->oob_wake_irq) {
4342 		err = marvell_config_oob_wake(hdev);
4343 		if (err)
4344 			goto out_free_dev;
4345 	}
4346 #endif
4347 	if (id->driver_info & BTUSB_CW6622)
4348 		set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
4349 
4350 	if (id->driver_info & BTUSB_BCM2045)
4351 		set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
4352 
4353 	if (id->driver_info & BTUSB_BCM92035)
4354 		hdev->setup = btusb_setup_bcm92035;
4355 
4356 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
4357 	    (id->driver_info & BTUSB_BCM_PATCHRAM)) {
4358 		hdev->manufacturer = 15;
4359 		hdev->setup = btbcm_setup_patchram;
4360 		hdev->set_diag = btusb_bcm_set_diag;
4361 		hdev->set_bdaddr = btbcm_set_bdaddr;
4362 
4363 		/* Broadcom LM_DIAG Interface numbers are hardcoded */
4364 		data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
4365 	}
4366 
4367 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
4368 	    (id->driver_info & BTUSB_BCM_APPLE)) {
4369 		hdev->manufacturer = 15;
4370 		hdev->setup = btbcm_setup_apple;
4371 		hdev->set_diag = btusb_bcm_set_diag;
4372 
4373 		/* Broadcom LM_DIAG Interface numbers are hardcoded */
4374 		data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
4375 	}
4376 
4377 	/* Combined Intel Device setup to support multiple setup routine */
4378 	if (id->driver_info & BTUSB_INTEL_COMBINED) {
4379 		err = btintel_configure_setup(hdev, btusb_driver.name);
4380 		if (err)
4381 			goto out_free_dev;
4382 
4383 		/* Transport specific configuration */
4384 		hdev->send = btusb_send_frame_intel;
4385 		hdev->cmd_timeout = btusb_intel_cmd_timeout;
4386 
4387 		if (id->driver_info & BTUSB_INTEL_NO_WBS_SUPPORT)
4388 			btintel_set_flag(hdev, INTEL_ROM_LEGACY_NO_WBS_SUPPORT);
4389 
4390 		if (id->driver_info & BTUSB_INTEL_BROKEN_INITIAL_NCMD)
4391 			btintel_set_flag(hdev, INTEL_BROKEN_INITIAL_NCMD);
4392 
4393 		if (id->driver_info & BTUSB_INTEL_BROKEN_SHUTDOWN_LED)
4394 			btintel_set_flag(hdev, INTEL_BROKEN_SHUTDOWN_LED);
4395 	}
4396 
4397 	if (id->driver_info & BTUSB_MARVELL)
4398 		hdev->set_bdaddr = btusb_set_bdaddr_marvell;
4399 
4400 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK) &&
4401 	    (id->driver_info & BTUSB_MEDIATEK)) {
4402 		hdev->setup = btusb_mtk_setup;
4403 		hdev->shutdown = btusb_mtk_shutdown;
4404 		hdev->manufacturer = 70;
4405 		hdev->cmd_timeout = btmtk_reset_sync;
4406 		hdev->set_bdaddr = btmtk_set_bdaddr;
4407 		set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &hdev->quirks);
4408 		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
4409 		data->recv_acl = btusb_recv_acl_mtk;
4410 	}
4411 
4412 	if (id->driver_info & BTUSB_SWAVE) {
4413 		set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
4414 		set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
4415 	}
4416 
4417 	if (id->driver_info & BTUSB_INTEL_BOOT) {
4418 		hdev->manufacturer = 2;
4419 		set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
4420 	}
4421 
4422 	if (id->driver_info & BTUSB_ATH3012) {
4423 		data->setup_on_usb = btusb_setup_qca;
4424 		hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
4425 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4426 		set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
4427 	}
4428 
4429 	if (id->driver_info & BTUSB_QCA_ROME) {
4430 		data->setup_on_usb = btusb_setup_qca;
4431 		hdev->shutdown = btusb_shutdown_qca;
4432 		hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
4433 		hdev->cmd_timeout = btusb_qca_cmd_timeout;
4434 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4435 		btusb_check_needs_reset_resume(intf);
4436 	}
4437 
4438 	if (id->driver_info & BTUSB_QCA_WCN6855) {
4439 		data->qca_dump.id_vendor = id->idVendor;
4440 		data->qca_dump.id_product = id->idProduct;
4441 		data->recv_event = btusb_recv_evt_qca;
4442 		data->recv_acl = btusb_recv_acl_qca;
4443 		hci_devcd_register(hdev, btusb_coredump_qca, btusb_dump_hdr_qca, NULL);
4444 		data->setup_on_usb = btusb_setup_qca;
4445 		hdev->shutdown = btusb_shutdown_qca;
4446 		hdev->set_bdaddr = btusb_set_bdaddr_wcn6855;
4447 		hdev->cmd_timeout = btusb_qca_cmd_timeout;
4448 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4449 		hci_set_msft_opcode(hdev, 0xFD70);
4450 	}
4451 
4452 	if (id->driver_info & BTUSB_AMP) {
4453 		/* AMP controllers do not support SCO packets */
4454 		data->isoc = NULL;
4455 	} else {
4456 		/* Interface orders are hardcoded in the specification */
4457 		data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
4458 		data->isoc_ifnum = ifnum_base + 1;
4459 	}
4460 
4461 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
4462 	    (id->driver_info & BTUSB_REALTEK)) {
4463 		btrtl_set_driver_name(hdev, btusb_driver.name);
4464 		hdev->setup = btusb_setup_realtek;
4465 		hdev->shutdown = btrtl_shutdown_realtek;
4466 		hdev->cmd_timeout = btusb_rtl_cmd_timeout;
4467 		hdev->hw_error = btusb_rtl_hw_error;
4468 
4469 		/* Realtek devices need to set remote wakeup on auto-suspend */
4470 		set_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags);
4471 		set_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags);
4472 	}
4473 
4474 	if (id->driver_info & BTUSB_ACTIONS_SEMI) {
4475 		/* Support is advertised, but not implemented */
4476 		set_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks);
4477 		set_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks);
4478 		set_bit(HCI_QUIRK_BROKEN_SET_RPA_TIMEOUT, &hdev->quirks);
4479 		set_bit(HCI_QUIRK_BROKEN_EXT_SCAN, &hdev->quirks);
4480 		set_bit(HCI_QUIRK_BROKEN_READ_ENC_KEY_SIZE, &hdev->quirks);
4481 	}
4482 
4483 	if (!reset)
4484 		set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
4485 
4486 	if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
4487 		if (!disable_scofix)
4488 			set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
4489 	}
4490 
4491 	if (id->driver_info & BTUSB_BROKEN_ISOC)
4492 		data->isoc = NULL;
4493 
4494 	if (id->driver_info & BTUSB_WIDEBAND_SPEECH)
4495 		set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
4496 
4497 	if (id->driver_info & BTUSB_VALID_LE_STATES)
4498 		set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
4499 
4500 	if (id->driver_info & BTUSB_DIGIANSWER) {
4501 		data->cmdreq_type = USB_TYPE_VENDOR;
4502 		set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
4503 	}
4504 
4505 	if (id->driver_info & BTUSB_CSR) {
4506 		struct usb_device *udev = data->udev;
4507 		u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
4508 
4509 		/* Old firmware would otherwise execute USB reset */
4510 		if (bcdDevice < 0x117)
4511 			set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
4512 
4513 		/* This must be set first in case we disable it for fakes */
4514 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4515 
4516 		/* Fake CSR devices with broken commands */
4517 		if (le16_to_cpu(udev->descriptor.idVendor)  == 0x0a12 &&
4518 		    le16_to_cpu(udev->descriptor.idProduct) == 0x0001)
4519 			hdev->setup = btusb_setup_csr;
4520 	}
4521 
4522 	if (id->driver_info & BTUSB_SNIFFER) {
4523 		struct usb_device *udev = data->udev;
4524 
4525 		/* New sniffer firmware has crippled HCI interface */
4526 		if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
4527 			set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
4528 	}
4529 
4530 	if (id->driver_info & BTUSB_INTEL_BOOT) {
4531 		/* A bug in the bootloader causes that interrupt interface is
4532 		 * only enabled after receiving SetInterface(0, AltSetting=0).
4533 		 */
4534 		err = usb_set_interface(data->udev, 0, 0);
4535 		if (err < 0) {
4536 			BT_ERR("failed to set interface 0, alt 0 %d", err);
4537 			goto out_free_dev;
4538 		}
4539 	}
4540 
4541 	if (data->isoc) {
4542 		err = usb_driver_claim_interface(&btusb_driver,
4543 						 data->isoc, data);
4544 		if (err < 0)
4545 			goto out_free_dev;
4546 	}
4547 
4548 	if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) && data->diag) {
4549 		if (!usb_driver_claim_interface(&btusb_driver,
4550 						data->diag, data))
4551 			__set_diag_interface(hdev);
4552 		else
4553 			data->diag = NULL;
4554 	}
4555 
4556 	if (enable_autosuspend)
4557 		usb_enable_autosuspend(data->udev);
4558 
4559 	data->poll_sync = enable_poll_sync;
4560 
4561 	err = hci_register_dev(hdev);
4562 	if (err < 0)
4563 		goto out_free_dev;
4564 
4565 	usb_set_intfdata(intf, data);
4566 
4567 	debugfs_create_file("force_poll_sync", 0644, hdev->debugfs, data,
4568 			    &force_poll_sync_fops);
4569 
4570 	return 0;
4571 
4572 out_free_dev:
4573 	if (data->reset_gpio)
4574 		gpiod_put(data->reset_gpio);
4575 	hci_free_dev(hdev);
4576 	return err;
4577 }
4578 
4579 static void btusb_disconnect(struct usb_interface *intf)
4580 {
4581 	struct btusb_data *data = usb_get_intfdata(intf);
4582 	struct hci_dev *hdev;
4583 
4584 	BT_DBG("intf %p", intf);
4585 
4586 	if (!data)
4587 		return;
4588 
4589 	hdev = data->hdev;
4590 	usb_set_intfdata(data->intf, NULL);
4591 
4592 	if (data->isoc)
4593 		usb_set_intfdata(data->isoc, NULL);
4594 
4595 	if (data->diag)
4596 		usb_set_intfdata(data->diag, NULL);
4597 
4598 	hci_unregister_dev(hdev);
4599 
4600 	if (intf == data->intf) {
4601 		if (data->isoc)
4602 			usb_driver_release_interface(&btusb_driver, data->isoc);
4603 		if (data->diag)
4604 			usb_driver_release_interface(&btusb_driver, data->diag);
4605 	} else if (intf == data->isoc) {
4606 		if (data->diag)
4607 			usb_driver_release_interface(&btusb_driver, data->diag);
4608 		usb_driver_release_interface(&btusb_driver, data->intf);
4609 	} else if (intf == data->diag) {
4610 		usb_driver_release_interface(&btusb_driver, data->intf);
4611 		if (data->isoc)
4612 			usb_driver_release_interface(&btusb_driver, data->isoc);
4613 	}
4614 
4615 	if (data->oob_wake_irq)
4616 		device_init_wakeup(&data->udev->dev, false);
4617 
4618 	if (data->reset_gpio)
4619 		gpiod_put(data->reset_gpio);
4620 
4621 	hci_free_dev(hdev);
4622 }
4623 
4624 #ifdef CONFIG_PM
4625 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
4626 {
4627 	struct btusb_data *data = usb_get_intfdata(intf);
4628 
4629 	BT_DBG("intf %p", intf);
4630 
4631 	if (data->suspend_count++)
4632 		return 0;
4633 
4634 	spin_lock_irq(&data->txlock);
4635 	if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
4636 		set_bit(BTUSB_SUSPENDING, &data->flags);
4637 		spin_unlock_irq(&data->txlock);
4638 	} else {
4639 		spin_unlock_irq(&data->txlock);
4640 		data->suspend_count--;
4641 		return -EBUSY;
4642 	}
4643 
4644 	cancel_work_sync(&data->work);
4645 
4646 	btusb_stop_traffic(data);
4647 	usb_kill_anchored_urbs(&data->tx_anchor);
4648 
4649 	if (data->oob_wake_irq && device_may_wakeup(&data->udev->dev)) {
4650 		set_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
4651 		enable_irq_wake(data->oob_wake_irq);
4652 		enable_irq(data->oob_wake_irq);
4653 	}
4654 
4655 	/* For global suspend, Realtek devices lose the loaded fw
4656 	 * in them. But for autosuspend, firmware should remain.
4657 	 * Actually, it depends on whether the usb host sends
4658 	 * set feature (enable wakeup) or not.
4659 	 */
4660 	if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags)) {
4661 		if (PMSG_IS_AUTO(message) &&
4662 		    device_can_wakeup(&data->udev->dev))
4663 			data->udev->do_remote_wakeup = 1;
4664 		else if (!PMSG_IS_AUTO(message) &&
4665 			 !device_may_wakeup(&data->udev->dev)) {
4666 			data->udev->do_remote_wakeup = 0;
4667 			data->udev->reset_resume = 1;
4668 		}
4669 	}
4670 
4671 	return 0;
4672 }
4673 
4674 static void play_deferred(struct btusb_data *data)
4675 {
4676 	struct urb *urb;
4677 	int err;
4678 
4679 	while ((urb = usb_get_from_anchor(&data->deferred))) {
4680 		usb_anchor_urb(urb, &data->tx_anchor);
4681 
4682 		err = usb_submit_urb(urb, GFP_ATOMIC);
4683 		if (err < 0) {
4684 			if (err != -EPERM && err != -ENODEV)
4685 				BT_ERR("%s urb %p submission failed (%d)",
4686 				       data->hdev->name, urb, -err);
4687 			kfree(urb->setup_packet);
4688 			usb_unanchor_urb(urb);
4689 			usb_free_urb(urb);
4690 			break;
4691 		}
4692 
4693 		data->tx_in_flight++;
4694 		usb_free_urb(urb);
4695 	}
4696 
4697 	/* Cleanup the rest deferred urbs. */
4698 	while ((urb = usb_get_from_anchor(&data->deferred))) {
4699 		kfree(urb->setup_packet);
4700 		usb_free_urb(urb);
4701 	}
4702 }
4703 
4704 static int btusb_resume(struct usb_interface *intf)
4705 {
4706 	struct btusb_data *data = usb_get_intfdata(intf);
4707 	struct hci_dev *hdev = data->hdev;
4708 	int err = 0;
4709 
4710 	BT_DBG("intf %p", intf);
4711 
4712 	if (--data->suspend_count)
4713 		return 0;
4714 
4715 	/* Disable only if not already disabled (keep it balanced) */
4716 	if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
4717 		disable_irq(data->oob_wake_irq);
4718 		disable_irq_wake(data->oob_wake_irq);
4719 	}
4720 
4721 	if (!test_bit(HCI_RUNNING, &hdev->flags))
4722 		goto done;
4723 
4724 	if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
4725 		err = btusb_submit_intr_urb(hdev, GFP_NOIO);
4726 		if (err < 0) {
4727 			clear_bit(BTUSB_INTR_RUNNING, &data->flags);
4728 			goto failed;
4729 		}
4730 	}
4731 
4732 	if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
4733 		err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
4734 		if (err < 0) {
4735 			clear_bit(BTUSB_BULK_RUNNING, &data->flags);
4736 			goto failed;
4737 		}
4738 
4739 		btusb_submit_bulk_urb(hdev, GFP_NOIO);
4740 	}
4741 
4742 	if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
4743 		if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
4744 			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
4745 		else
4746 			btusb_submit_isoc_urb(hdev, GFP_NOIO);
4747 	}
4748 
4749 	spin_lock_irq(&data->txlock);
4750 	play_deferred(data);
4751 	clear_bit(BTUSB_SUSPENDING, &data->flags);
4752 	spin_unlock_irq(&data->txlock);
4753 	schedule_work(&data->work);
4754 
4755 	return 0;
4756 
4757 failed:
4758 	usb_scuttle_anchored_urbs(&data->deferred);
4759 done:
4760 	spin_lock_irq(&data->txlock);
4761 	clear_bit(BTUSB_SUSPENDING, &data->flags);
4762 	spin_unlock_irq(&data->txlock);
4763 
4764 	return err;
4765 }
4766 #endif
4767 
4768 #ifdef CONFIG_DEV_COREDUMP
4769 static void btusb_coredump(struct device *dev)
4770 {
4771 	struct btusb_data *data = dev_get_drvdata(dev);
4772 	struct hci_dev *hdev = data->hdev;
4773 
4774 	if (hdev->dump.coredump)
4775 		hdev->dump.coredump(hdev);
4776 }
4777 #endif
4778 
4779 static struct usb_driver btusb_driver = {
4780 	.name		= "btusb",
4781 	.probe		= btusb_probe,
4782 	.disconnect	= btusb_disconnect,
4783 #ifdef CONFIG_PM
4784 	.suspend	= btusb_suspend,
4785 	.resume		= btusb_resume,
4786 #endif
4787 	.id_table	= btusb_table,
4788 	.supports_autosuspend = 1,
4789 	.disable_hub_initiated_lpm = 1,
4790 
4791 #ifdef CONFIG_DEV_COREDUMP
4792 	.drvwrap = {
4793 		.driver = {
4794 			.coredump = btusb_coredump,
4795 		},
4796 	},
4797 #endif
4798 };
4799 
4800 module_usb_driver(btusb_driver);
4801 
4802 module_param(disable_scofix, bool, 0644);
4803 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
4804 
4805 module_param(force_scofix, bool, 0644);
4806 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
4807 
4808 module_param(enable_autosuspend, bool, 0644);
4809 MODULE_PARM_DESC(enable_autosuspend, "Enable USB autosuspend by default");
4810 
4811 module_param(reset, bool, 0644);
4812 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
4813 
4814 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
4815 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
4816 MODULE_VERSION(VERSION);
4817 MODULE_LICENSE("GPL");
4818