drivers/bluetooth/btusb.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  *  Generic Bluetooth USB driver
   5  *
   6  *  Copyright (C) 2005-2008  Marcel Holtmann <marcel@holtmann.org>
   7  */
   8
   9 #include <linux/dmi.h>
  10 #include <linux/module.h>
  11 #include <linux/usb.h>
  12 #include <linux/usb/quirks.h>
  13 #include <linux/firmware.h>
  14 #include <linux/iopoll.h>
  15 #include <linux/of_device.h>
  16 #include <linux/of_irq.h>
  17 #include <linux/suspend.h>
  18 #include <linux/gpio/consumer.h>
  19 #include <asm/unaligned.h>
  20
  21 #include <net/bluetooth/bluetooth.h>
  22 #include <net/bluetooth/hci_core.h>
  23
  24 #include "btintel.h"
  25 #include "btbcm.h"
  26 #include "btrtl.h"
  27
  28 #define VERSION "0.8"
  29
  30 static bool disable_scofix;
  31 static bool force_scofix;
  32 static bool enable_autosuspend = IS_ENABLED(CONFIG_BT_HCIBTUSB_AUTOSUSPEND);
  33
  34 static bool reset = true;
  35
  36 static struct usb_driver btusb_driver;
  37
  38 #define BTUSB_IGNORE            0x01
  39 #define BTUSB_DIGIANSWER        0x02
  40 #define BTUSB_CSR               0x04
  41 #define BTUSB_SNIFFER           0x08
  42 #define BTUSB_BCM92035          0x10
  43 #define BTUSB_BROKEN_ISOC       0x20
  44 #define BTUSB_WRONG_SCO_MTU     0x40
  45 #define BTUSB_ATH3012           0x80
  46 #define BTUSB_INTEL             0x100
  47 #define BTUSB_INTEL_BOOT        0x200
  48 #define BTUSB_BCM_PATCHRAM      0x400
  49 #define BTUSB_MARVELL           0x800
  50 #define BTUSB_SWAVE             0x1000
  51 #define BTUSB_INTEL_NEW         0x2000
  52 #define BTUSB_AMP               0x4000
  53 #define BTUSB_QCA_ROME          0x8000
  54 #define BTUSB_BCM_APPLE         0x10000
  55 #define BTUSB_REALTEK           0x20000
  56 #define BTUSB_BCM2045           0x40000
  57 #define BTUSB_IFNUM_2           0x80000
  58 #define BTUSB_CW6622            0x100000
  59 #define BTUSB_MEDIATEK          0x200000
  60 #define BTUSB_WIDEBAND_SPEECH   0x400000
  61 #define BTUSB_VALID_LE_STATES   0x800000
  62 #define BTUSB_QCA_WCN6855       0x1000000
  63 #define BTUSB_INTEL_NEWGEN      0x2000000
  64
  65 static const struct usb_device_id btusb_table[] = {
  66         /* Generic Bluetooth USB device */
  67         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
  68
  69         /* Generic Bluetooth AMP device */
  70         { USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
  71
  72         /* Generic Bluetooth USB interface */
  73         { USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },
  74
  75         /* Apple-specific (Broadcom) devices */
  76         { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
  77           .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },
  78
  79         /* MediaTek MT76x0E */
  80         { USB_DEVICE(0x0e8d, 0x763f) },
  81
  82         /* Broadcom SoftSailing reporting vendor specific */
  83         { USB_DEVICE(0x0a5c, 0x21e1) },
  84
  85         /* Apple MacBookPro 7,1 */
  86         { USB_DEVICE(0x05ac, 0x8213) },
  87
  88         /* Apple iMac11,1 */
  89         { USB_DEVICE(0x05ac, 0x8215) },
  90
  91         /* Apple MacBookPro6,2 */
  92         { USB_DEVICE(0x05ac, 0x8218) },
  93
  94         /* Apple MacBookAir3,1, MacBookAir3,2 */
  95         { USB_DEVICE(0x05ac, 0x821b) },
  96
  97         /* Apple MacBookAir4,1 */
  98         { USB_DEVICE(0x05ac, 0x821f) },
  99
 100         /* Apple MacBookPro8,2 */
 101         { USB_DEVICE(0x05ac, 0x821a) },
 102
 103         /* Apple MacMini5,1 */
 104         { USB_DEVICE(0x05ac, 0x8281) },
 105
 106         /* AVM BlueFRITZ! USB v2.0 */
 107         { USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },
 108
 109         /* Bluetooth Ultraport Module from IBM */
 110         { USB_DEVICE(0x04bf, 0x030a) },
 111
 112         /* ALPS Modules with non-standard id */
 113         { USB_DEVICE(0x044e, 0x3001) },
 114         { USB_DEVICE(0x044e, 0x3002) },
 115
 116         /* Ericsson with non-standard id */
 117         { USB_DEVICE(0x0bdb, 0x1002) },
 118
 119         /* Canyon CN-BTU1 with HID interfaces */
 120         { USB_DEVICE(0x0c10, 0x0000) },
 121
 122         /* Broadcom BCM20702A0 */
 123         { USB_DEVICE(0x413c, 0x8197) },
 124
 125         /* Broadcom BCM20702B0 (Dynex/Insignia) */
 126         { USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
 127
 128         /* Broadcom BCM43142A0 (Foxconn/Lenovo) */
 129         { USB_VENDOR_AND_INTERFACE_INFO(0x105b, 0xff, 0x01, 0x01),
 130           .driver_info = BTUSB_BCM_PATCHRAM },
 131
 132         /* Broadcom BCM920703 (HTC Vive) */
 133         { USB_VENDOR_AND_INTERFACE_INFO(0x0bb4, 0xff, 0x01, 0x01),
 134           .driver_info = BTUSB_BCM_PATCHRAM },
 135
 136         /* Foxconn - Hon Hai */
 137         { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
 138           .driver_info = BTUSB_BCM_PATCHRAM },
 139
 140         /* Lite-On Technology - Broadcom based */
 141         { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
 142           .driver_info = BTUSB_BCM_PATCHRAM },
 143
 144         /* Broadcom devices with vendor specific id */
 145         { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
 146           .driver_info = BTUSB_BCM_PATCHRAM },
 147
 148         /* ASUSTek Computer - Broadcom based */
 149         { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
 150           .driver_info = BTUSB_BCM_PATCHRAM },
 151
 152         /* Belkin F8065bf - Broadcom based */
 153         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
 154           .driver_info = BTUSB_BCM_PATCHRAM },
 155
 156         /* IMC Networks - Broadcom based */
 157         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
 158           .driver_info = BTUSB_BCM_PATCHRAM },
 159
 160         /* Dell Computer - Broadcom based  */
 161         { USB_VENDOR_AND_INTERFACE_INFO(0x413c, 0xff, 0x01, 0x01),
 162           .driver_info = BTUSB_BCM_PATCHRAM },
 163
 164         /* Toshiba Corp - Broadcom based */
 165         { USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
 166           .driver_info = BTUSB_BCM_PATCHRAM },
 167
 168         /* Intel Bluetooth USB Bootloader (RAM module) */
 169         { USB_DEVICE(0x8087, 0x0a5a),
 170           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
 171
 172         { }     /* Terminating entry */
 173 };
 174
 175 MODULE_DEVICE_TABLE(usb, btusb_table);
 176
 177 static const struct usb_device_id blacklist_table[] = {
 178         /* CSR BlueCore devices */
 179         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
 180
 181         /* Broadcom BCM2033 without firmware */
 182         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
 183
 184         /* Broadcom BCM2045 devices */
 185         { USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },
 186
 187         /* Atheros 3011 with sflash firmware */
 188         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
 189         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
 190         { USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
 191         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
 192         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
 193         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
 194         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
 195
 196         /* Atheros AR9285 Malbec with sflash firmware */
 197         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
 198
 199         /* Atheros 3012 with sflash firmware */
 200         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
 201         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
 202         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
 203         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
 204         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
 205         { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
 206         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
 207         { USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
 208         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 209         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 210         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
 211         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
 212         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
 213         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
 214         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
 215         { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
 216         { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
 217         { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
 218         { USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
 219         { USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
 220         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 221         { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
 222         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
 223         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
 224         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
 225         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
 226         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 227         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 228         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
 229         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
 230         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
 231         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
 232         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
 233         { USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
 234         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
 235         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
 236         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
 237         { USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
 238         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 239         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 240         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 241         { USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
 242         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 243         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 244         { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
 245         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
 246         { USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
 247         { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
 248         { USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
 249         { USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
 250
 251         /* Atheros AR5BBU12 with sflash firmware */
 252         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
 253
 254         /* Atheros AR5BBU12 with sflash firmware */
 255         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
 256         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
 257
 258         /* QCA ROME chipset */
 259         { USB_DEVICE(0x0cf3, 0x535b), .driver_info = BTUSB_QCA_ROME |
 260                                                      BTUSB_WIDEBAND_SPEECH },
 261         { USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME |
 262                                                      BTUSB_WIDEBAND_SPEECH },
 263         { USB_DEVICE(0x0cf3, 0xe009), .driver_info = BTUSB_QCA_ROME |
 264                                                      BTUSB_WIDEBAND_SPEECH },
 265         { USB_DEVICE(0x0cf3, 0xe010), .driver_info = BTUSB_QCA_ROME |
 266                                                      BTUSB_WIDEBAND_SPEECH },
 267         { USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME |
 268                                                      BTUSB_WIDEBAND_SPEECH },
 269         { USB_DEVICE(0x0cf3, 0xe301), .driver_info = BTUSB_QCA_ROME |
 270                                                      BTUSB_WIDEBAND_SPEECH },
 271         { USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME |
 272                                                      BTUSB_WIDEBAND_SPEECH },
 273         { USB_DEVICE(0x0489, 0xe092), .driver_info = BTUSB_QCA_ROME |
 274                                                      BTUSB_WIDEBAND_SPEECH },
 275         { USB_DEVICE(0x0489, 0xe09f), .driver_info = BTUSB_QCA_ROME |
 276                                                      BTUSB_WIDEBAND_SPEECH },
 277         { USB_DEVICE(0x0489, 0xe0a2), .driver_info = BTUSB_QCA_ROME |
 278                                                      BTUSB_WIDEBAND_SPEECH },
 279         { USB_DEVICE(0x04ca, 0x3011), .driver_info = BTUSB_QCA_ROME |
 280                                                      BTUSB_WIDEBAND_SPEECH },
 281         { USB_DEVICE(0x04ca, 0x3015), .driver_info = BTUSB_QCA_ROME |
 282                                                      BTUSB_WIDEBAND_SPEECH },
 283         { USB_DEVICE(0x04ca, 0x3016), .driver_info = BTUSB_QCA_ROME |
 284                                                      BTUSB_WIDEBAND_SPEECH },
 285         { USB_DEVICE(0x04ca, 0x301a), .driver_info = BTUSB_QCA_ROME |
 286                                                      BTUSB_WIDEBAND_SPEECH },
 287         { USB_DEVICE(0x04ca, 0x3021), .driver_info = BTUSB_QCA_ROME |
 288                                                      BTUSB_WIDEBAND_SPEECH },
 289         { USB_DEVICE(0x13d3, 0x3491), .driver_info = BTUSB_QCA_ROME |
 290                                                      BTUSB_WIDEBAND_SPEECH },
 291         { USB_DEVICE(0x13d3, 0x3496), .driver_info = BTUSB_QCA_ROME |
 292                                                      BTUSB_WIDEBAND_SPEECH },
 293         { USB_DEVICE(0x13d3, 0x3501), .driver_info = BTUSB_QCA_ROME |
 294                                                      BTUSB_WIDEBAND_SPEECH },
 295
 296         /* QCA WCN6855 chipset */
 297         { USB_DEVICE(0x0cf3, 0xe600), .driver_info = BTUSB_QCA_WCN6855 |
 298                                                      BTUSB_WIDEBAND_SPEECH },
 299
 300         /* Broadcom BCM2035 */
 301         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 302         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
 303         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
 304
 305         /* Broadcom BCM2045 */
 306         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
 307         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
 308
 309         /* IBM/Lenovo ThinkPad with Broadcom chip */
 310         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
 311         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
 312
 313         /* HP laptop with Broadcom chip */
 314         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
 315
 316         /* Dell laptop with Broadcom chip */
 317         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
 318
 319         /* Dell Wireless 370 and 410 devices */
 320         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
 321         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
 322
 323         /* Belkin F8T012 and F8T013 devices */
 324         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
 325         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
 326
 327         /* Asus WL-BTD202 device */
 328         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
 329
 330         /* Kensington Bluetooth USB adapter */
 331         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
 332
 333         /* RTX Telecom based adapters with buggy SCO support */
 334         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
 335         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
 336
 337         /* CONWISE Technology based adapters with buggy SCO support */
 338         { USB_DEVICE(0x0e5e, 0x6622),
 339           .driver_info = BTUSB_BROKEN_ISOC | BTUSB_CW6622},
 340
 341         /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
 342         { USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
 343
 344         /* Digianswer devices */
 345         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
 346         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
 347
 348         /* CSR BlueCore Bluetooth Sniffer */
 349         { USB_DEVICE(0x0a12, 0x0002),
 350           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
 351
 352         /* Frontline ComProbe Bluetooth Sniffer */
 353         { USB_DEVICE(0x16d3, 0x0002),
 354           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
 355
 356         /* Marvell Bluetooth devices */
 357         { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
 358         { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
 359         { USB_DEVICE(0x1286, 0x204e), .driver_info = BTUSB_MARVELL },
 360
 361         /* Intel Bluetooth devices */
 362         { USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_NEW |
 363                                                      BTUSB_WIDEBAND_SPEECH |
 364                                                      BTUSB_VALID_LE_STATES },
 365         { USB_DEVICE(0x8087, 0x0026), .driver_info = BTUSB_INTEL_NEW |
 366                                                      BTUSB_WIDEBAND_SPEECH },
 367         { USB_DEVICE(0x8087, 0x0029), .driver_info = BTUSB_INTEL_NEW |
 368                                                      BTUSB_WIDEBAND_SPEECH },
 369         { USB_DEVICE(0x8087, 0x0032), .driver_info = BTUSB_INTEL_NEW |
 370                                                      BTUSB_WIDEBAND_SPEECH},
 371         { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
 372         { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
 373         { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },
 374         { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_NEW |
 375                                                      BTUSB_WIDEBAND_SPEECH },
 376         { USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL |
 377                                                      BTUSB_WIDEBAND_SPEECH },
 378         { USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_NEW |
 379                                                      BTUSB_WIDEBAND_SPEECH |
 380                                                      BTUSB_VALID_LE_STATES },
 381
 382         /* Other Intel Bluetooth devices */
 383         { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
 384           .driver_info = BTUSB_IGNORE },
 385
 386         /* Realtek 8822CE Bluetooth devices */
 387         { USB_DEVICE(0x0bda, 0xb00c), .driver_info = BTUSB_REALTEK |
 388                                                      BTUSB_WIDEBAND_SPEECH },
 389
 390         /* Realtek 8852AE Bluetooth devices */
 391         { USB_DEVICE(0x0bda, 0xc852), .driver_info = BTUSB_REALTEK |
 392                                                      BTUSB_WIDEBAND_SPEECH },
 393
 394         /* Realtek Bluetooth devices */
 395         { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
 396           .driver_info = BTUSB_REALTEK },
 397
 398         /* MediaTek Bluetooth devices */
 399         { USB_VENDOR_AND_INTERFACE_INFO(0x0e8d, 0xe0, 0x01, 0x01),
 400           .driver_info = BTUSB_MEDIATEK },
 401
 402         /* Additional MediaTek MT7615E Bluetooth devices */
 403         { USB_DEVICE(0x13d3, 0x3560), .driver_info = BTUSB_MEDIATEK},
 404
 405         /* Additional Realtek 8723AE Bluetooth devices */
 406         { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
 407         { USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
 408
 409         /* Additional Realtek 8723BE Bluetooth devices */
 410         { USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
 411         { USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
 412         { USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
 413         { USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
 414         { USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
 415         { USB_DEVICE(0x13d3, 0x3494), .driver_info = BTUSB_REALTEK },
 416
 417         /* Additional Realtek 8723BU Bluetooth devices */
 418         { USB_DEVICE(0x7392, 0xa611), .driver_info = BTUSB_REALTEK },
 419
 420         /* Additional Realtek 8723DE Bluetooth devices */
 421         { USB_DEVICE(0x0bda, 0xb009), .driver_info = BTUSB_REALTEK },
 422         { USB_DEVICE(0x2ff8, 0xb011), .driver_info = BTUSB_REALTEK },
 423
 424         /* Additional Realtek 8821AE Bluetooth devices */
 425         { USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
 426         { USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
 427         { USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
 428         { USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
 429         { USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
 430
 431         /* Additional Realtek 8822BE Bluetooth devices */
 432         { USB_DEVICE(0x13d3, 0x3526), .driver_info = BTUSB_REALTEK },
 433         { USB_DEVICE(0x0b05, 0x185c), .driver_info = BTUSB_REALTEK },
 434
 435         /* Additional Realtek 8822CE Bluetooth devices */
 436         { USB_DEVICE(0x04ca, 0x4005), .driver_info = BTUSB_REALTEK |
 437                                                      BTUSB_WIDEBAND_SPEECH },
 438         { USB_DEVICE(0x04c5, 0x161f), .driver_info = BTUSB_REALTEK |
 439                                                      BTUSB_WIDEBAND_SPEECH },
 440         { USB_DEVICE(0x0b05, 0x18ef), .driver_info = BTUSB_REALTEK |
 441                                                      BTUSB_WIDEBAND_SPEECH },
 442         { USB_DEVICE(0x13d3, 0x3548), .driver_info = BTUSB_REALTEK |
 443                                                      BTUSB_WIDEBAND_SPEECH },
 444         { USB_DEVICE(0x13d3, 0x3549), .driver_info = BTUSB_REALTEK |
 445                                                      BTUSB_WIDEBAND_SPEECH },
 446         { USB_DEVICE(0x13d3, 0x3553), .driver_info = BTUSB_REALTEK |
 447                                                      BTUSB_WIDEBAND_SPEECH },
 448         { USB_DEVICE(0x13d3, 0x3555), .driver_info = BTUSB_REALTEK |
 449                                                      BTUSB_WIDEBAND_SPEECH },
 450         { USB_DEVICE(0x2ff8, 0x3051), .driver_info = BTUSB_REALTEK |
 451                                                      BTUSB_WIDEBAND_SPEECH },
 452         { USB_DEVICE(0x1358, 0xc123), .driver_info = BTUSB_REALTEK |
 453                                                      BTUSB_WIDEBAND_SPEECH },
 454         { USB_DEVICE(0x0bda, 0xc123), .driver_info = BTUSB_REALTEK |
 455                                                      BTUSB_WIDEBAND_SPEECH },
 456
 457         /* Silicon Wave based devices */
 458         { USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
 459
 460         { }     /* Terminating entry */
 461 };
 462
 463 /* The Bluetooth USB module build into some devices needs to be reset on resume,
 464  * this is a problem with the platform (likely shutting off all power) not with
 465  * the module itself. So we use a DMI list to match known broken platforms.
 466  */
 467 static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
 468         {
 469                 /* Dell OptiPlex 3060 (QCA ROME device 0cf3:e007) */
 470                 .matches = {
 471                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 472                         DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 3060"),
 473                 },
 474         },
 475         {
 476                 /* Dell XPS 9360 (QCA ROME device 0cf3:e300) */
 477                 .matches = {
 478                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 479                         DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
 480                 },
 481         },
 482         {
 483                 /* Dell Inspiron 5565 (QCA ROME device 0cf3:e009) */
 484                 .matches = {
 485                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 486                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5565"),
 487                 },
 488         },
 489         {}
 490 };
 491
 492 #define BTUSB_MAX_ISOC_FRAMES   10
 493
 494 #define BTUSB_INTR_RUNNING      0
 495 #define BTUSB_BULK_RUNNING      1
 496 #define BTUSB_ISOC_RUNNING      2
 497 #define BTUSB_SUSPENDING        3
 498 #define BTUSB_DID_ISO_RESUME    4
 499 #define BTUSB_BOOTLOADER        5
 500 #define BTUSB_DOWNLOADING       6
 501 #define BTUSB_FIRMWARE_LOADED   7
 502 #define BTUSB_FIRMWARE_FAILED   8
 503 #define BTUSB_BOOTING           9
 504 #define BTUSB_DIAG_RUNNING      10
 505 #define BTUSB_OOB_WAKE_ENABLED  11
 506 #define BTUSB_HW_RESET_ACTIVE   12
 507 #define BTUSB_TX_WAIT_VND_EVT   13
 508 #define BTUSB_WAKEUP_DISABLE    14
 509 #define BTUSB_USE_ALT1_FOR_WBS  15
 510
 511 struct btusb_data {
 512         struct hci_dev       *hdev;
 513         struct usb_device    *udev;
 514         struct usb_interface *intf;
 515         struct usb_interface *isoc;
 516         struct usb_interface *diag;
 517         unsigned isoc_ifnum;
 518
 519         unsigned long flags;
 520
 521         struct work_struct work;
 522         struct work_struct waker;
 523
 524         struct usb_anchor deferred;
 525         struct usb_anchor tx_anchor;
 526         int tx_in_flight;
 527         spinlock_t txlock;
 528
 529         struct usb_anchor intr_anchor;
 530         struct usb_anchor bulk_anchor;
 531         struct usb_anchor isoc_anchor;
 532         struct usb_anchor diag_anchor;
 533         struct usb_anchor ctrl_anchor;
 534         spinlock_t rxlock;
 535
 536         struct sk_buff *evt_skb;
 537         struct sk_buff *acl_skb;
 538         struct sk_buff *sco_skb;
 539
 540         struct usb_endpoint_descriptor *intr_ep;
 541         struct usb_endpoint_descriptor *bulk_tx_ep;
 542         struct usb_endpoint_descriptor *bulk_rx_ep;
 543         struct usb_endpoint_descriptor *isoc_tx_ep;
 544         struct usb_endpoint_descriptor *isoc_rx_ep;
 545         struct usb_endpoint_descriptor *diag_tx_ep;
 546         struct usb_endpoint_descriptor *diag_rx_ep;
 547
 548         struct gpio_desc *reset_gpio;
 549
 550         __u8 cmdreq_type;
 551         __u8 cmdreq;
 552
 553         unsigned int sco_num;
 554         unsigned int air_mode;
 555         bool usb_alt6_packet_flow;
 556         int isoc_altsetting;
 557         int suspend_count;
 558
 559         int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
 560         int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
 561
 562         int (*setup_on_usb)(struct hci_dev *hdev);
 563
 564         int oob_wake_irq;   /* irq for out-of-band wake-on-bt */
 565         unsigned cmd_timeout_cnt;
 566 };
 567
 568 static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
 569 {
 570         struct btusb_data *data = hci_get_drvdata(hdev);
 571         struct gpio_desc *reset_gpio = data->reset_gpio;
 572
 573         if (++data->cmd_timeout_cnt < 5)
 574                 return;
 575
 576         if (!reset_gpio) {
 577                 bt_dev_err(hdev, "No way to reset. Ignoring and continuing");
 578                 return;
 579         }
 580
 581         /*
 582          * Toggle the hard reset line if the platform provides one. The reset
 583          * is going to yank the device off the USB and then replug. So doing
 584          * once is enough. The cleanup is handled correctly on the way out
 585          * (standard USB disconnect), and the new device is detected cleanly
 586          * and bound to the driver again like it should be.
 587          */
 588         if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
 589                 bt_dev_err(hdev, "last reset failed? Not resetting again");
 590                 return;
 591         }
 592
 593         bt_dev_err(hdev, "Initiating HW reset via gpio");
 594         gpiod_set_value_cansleep(reset_gpio, 1);
 595         msleep(100);
 596         gpiod_set_value_cansleep(reset_gpio, 0);
 597 }
 598
 599 static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
 600 {
 601         struct btusb_data *data = hci_get_drvdata(hdev);
 602         struct gpio_desc *reset_gpio = data->reset_gpio;
 603
 604         if (++data->cmd_timeout_cnt < 5)
 605                 return;
 606
 607         if (!reset_gpio) {
 608                 bt_dev_err(hdev, "No gpio to reset Realtek device, ignoring");
 609                 return;
 610         }
 611
 612         /* Toggle the hard reset line. The Realtek device is going to
 613          * yank itself off the USB and then replug. The cleanup is handled
 614          * correctly on the way out (standard USB disconnect), and the new
 615          * device is detected cleanly and bound to the driver again like
 616          * it should be.
 617          */
 618         if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
 619                 bt_dev_err(hdev, "last reset failed? Not resetting again");
 620                 return;
 621         }
 622
 623         bt_dev_err(hdev, "Reset Realtek device via gpio");
 624         gpiod_set_value_cansleep(reset_gpio, 1);
 625         msleep(200);
 626         gpiod_set_value_cansleep(reset_gpio, 0);
 627 }
 628
 629 static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
 630 {
 631         struct btusb_data *data = hci_get_drvdata(hdev);
 632         int err;
 633
 634         if (++data->cmd_timeout_cnt < 5)
 635                 return;
 636
 637         bt_dev_err(hdev, "Multiple cmd timeouts seen. Resetting usb device.");
 638         /* This is not an unbalanced PM reference since the device will reset */
 639         err = usb_autopm_get_interface(data->intf);
 640         if (!err)
 641                 usb_queue_reset_device(data->intf);
 642         else
 643                 bt_dev_err(hdev, "Failed usb_autopm_get_interface with %d", err);
 644 }
 645
 646 static inline void btusb_free_frags(struct btusb_data *data)
 647 {
 648         unsigned long flags;
 649
 650         spin_lock_irqsave(&data->rxlock, flags);
 651
 652         kfree_skb(data->evt_skb);
 653         data->evt_skb = NULL;
 654
 655         kfree_skb(data->acl_skb);
 656         data->acl_skb = NULL;
 657
 658         kfree_skb(data->sco_skb);
 659         data->sco_skb = NULL;
 660
 661         spin_unlock_irqrestore(&data->rxlock, flags);
 662 }
 663
 664 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
 665 {
 666         struct sk_buff *skb;
 667         unsigned long flags;
 668         int err = 0;
 669
 670         spin_lock_irqsave(&data->rxlock, flags);
 671         skb = data->evt_skb;
 672
 673         while (count) {
 674                 int len;
 675
 676                 if (!skb) {
 677                         skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
 678                         if (!skb) {
 679                                 err = -ENOMEM;
 680                                 break;
 681                         }
 682
 683                         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
 684                         hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
 685                 }
 686
 687                 len = min_t(uint, hci_skb_expect(skb), count);
 688                 skb_put_data(skb, buffer, len);
 689
 690                 count -= len;
 691                 buffer += len;
 692                 hci_skb_expect(skb) -= len;
 693
 694                 if (skb->len == HCI_EVENT_HDR_SIZE) {
 695                         /* Complete event header */
 696                         hci_skb_expect(skb) = hci_event_hdr(skb)->plen;
 697
 698                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 699                                 kfree_skb(skb);
 700                                 skb = NULL;
 701
 702                                 err = -EILSEQ;
 703                                 break;
 704                         }
 705                 }
 706
 707                 if (!hci_skb_expect(skb)) {
 708                         /* Complete frame */
 709                         data->recv_event(data->hdev, skb);
 710                         skb = NULL;
 711                 }
 712         }
 713
 714         data->evt_skb = skb;
 715         spin_unlock_irqrestore(&data->rxlock, flags);
 716
 717         return err;
 718 }
 719
 720 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
 721 {
 722         struct sk_buff *skb;
 723         unsigned long flags;
 724         int err = 0;
 725
 726         spin_lock_irqsave(&data->rxlock, flags);
 727         skb = data->acl_skb;
 728
 729         while (count) {
 730                 int len;
 731
 732                 if (!skb) {
 733                         skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
 734                         if (!skb) {
 735                                 err = -ENOMEM;
 736                                 break;
 737                         }
 738
 739                         hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
 740                         hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
 741                 }
 742
 743                 len = min_t(uint, hci_skb_expect(skb), count);
 744                 skb_put_data(skb, buffer, len);
 745
 746                 count -= len;
 747                 buffer += len;
 748                 hci_skb_expect(skb) -= len;
 749
 750                 if (skb->len == HCI_ACL_HDR_SIZE) {
 751                         __le16 dlen = hci_acl_hdr(skb)->dlen;
 752
 753                         /* Complete ACL header */
 754                         hci_skb_expect(skb) = __le16_to_cpu(dlen);
 755
 756                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 757                                 kfree_skb(skb);
 758                                 skb = NULL;
 759
 760                                 err = -EILSEQ;
 761                                 break;
 762                         }
 763                 }
 764
 765                 if (!hci_skb_expect(skb)) {
 766                         /* Complete frame */
 767                         hci_recv_frame(data->hdev, skb);
 768                         skb = NULL;
 769                 }
 770         }
 771
 772         data->acl_skb = skb;
 773         spin_unlock_irqrestore(&data->rxlock, flags);
 774
 775         return err;
 776 }
 777
 778 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
 779 {
 780         struct sk_buff *skb;
 781         unsigned long flags;
 782         int err = 0;
 783
 784         spin_lock_irqsave(&data->rxlock, flags);
 785         skb = data->sco_skb;
 786
 787         while (count) {
 788                 int len;
 789
 790                 if (!skb) {
 791                         skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
 792                         if (!skb) {
 793                                 err = -ENOMEM;
 794                                 break;
 795                         }
 796
 797                         hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
 798                         hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
 799                 }
 800
 801                 len = min_t(uint, hci_skb_expect(skb), count);
 802                 skb_put_data(skb, buffer, len);
 803
 804                 count -= len;
 805                 buffer += len;
 806                 hci_skb_expect(skb) -= len;
 807
 808                 if (skb->len == HCI_SCO_HDR_SIZE) {
 809                         /* Complete SCO header */
 810                         hci_skb_expect(skb) = hci_sco_hdr(skb)->dlen;
 811
 812                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 813                                 kfree_skb(skb);
 814                                 skb = NULL;
 815
 816                                 err = -EILSEQ;
 817                                 break;
 818                         }
 819                 }
 820
 821                 if (!hci_skb_expect(skb)) {
 822                         /* Complete frame */
 823                         hci_recv_frame(data->hdev, skb);
 824                         skb = NULL;
 825                 }
 826         }
 827
 828         data->sco_skb = skb;
 829         spin_unlock_irqrestore(&data->rxlock, flags);
 830
 831         return err;
 832 }
 833
 834 static void btusb_intr_complete(struct urb *urb)
 835 {
 836         struct hci_dev *hdev = urb->context;
 837         struct btusb_data *data = hci_get_drvdata(hdev);
 838         int err;
 839
 840         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
 841                urb->actual_length);
 842
 843         if (!test_bit(HCI_RUNNING, &hdev->flags))
 844                 return;
 845
 846         if (urb->status == 0) {
 847                 hdev->stat.byte_rx += urb->actual_length;
 848
 849                 if (btusb_recv_intr(data, urb->transfer_buffer,
 850                                     urb->actual_length) < 0) {
 851                         bt_dev_err(hdev, "corrupted event packet");
 852                         hdev->stat.err_rx++;
 853                 }
 854         } else if (urb->status == -ENOENT) {
 855                 /* Avoid suspend failed when usb_kill_urb */
 856                 return;
 857         }
 858
 859         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 860                 return;
 861
 862         usb_mark_last_busy(data->udev);
 863         usb_anchor_urb(urb, &data->intr_anchor);
 864
 865         err = usb_submit_urb(urb, GFP_ATOMIC);
 866         if (err < 0) {
 867                 /* -EPERM: urb is being killed;
 868                  * -ENODEV: device got disconnected
 869                  */
 870                 if (err != -EPERM && err != -ENODEV)
 871                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
 872                                    urb, -err);
 873                 usb_unanchor_urb(urb);
 874         }
 875 }
 876
 877 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 878 {
 879         struct btusb_data *data = hci_get_drvdata(hdev);
 880         struct urb *urb;
 881         unsigned char *buf;
 882         unsigned int pipe;
 883         int err, size;
 884
 885         BT_DBG("%s", hdev->name);
 886
 887         if (!data->intr_ep)
 888                 return -ENODEV;
 889
 890         urb = usb_alloc_urb(0, mem_flags);
 891         if (!urb)
 892                 return -ENOMEM;
 893
 894         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
 895
 896         buf = kmalloc(size, mem_flags);
 897         if (!buf) {
 898                 usb_free_urb(urb);
 899                 return -ENOMEM;
 900         }
 901
 902         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
 903
 904         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
 905                          btusb_intr_complete, hdev, data->intr_ep->bInterval);
 906
 907         urb->transfer_flags |= URB_FREE_BUFFER;
 908
 909         usb_anchor_urb(urb, &data->intr_anchor);
 910
 911         err = usb_submit_urb(urb, mem_flags);
 912         if (err < 0) {
 913                 if (err != -EPERM && err != -ENODEV)
 914                         bt_dev_err(hdev, "urb %p submission failed (%d)",
 915                                    urb, -err);
 916                 usb_unanchor_urb(urb);
 917         }
 918
 919         usb_free_urb(urb);
 920
 921         return err;
 922 }
 923
 924 static void btusb_bulk_complete(struct urb *urb)
 925 {
 926         struct hci_dev *hdev = urb->context;
 927         struct btusb_data *data = hci_get_drvdata(hdev);
 928         int err;
 929
 930         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
 931                urb->actual_length);
 932
 933         if (!test_bit(HCI_RUNNING, &hdev->flags))
 934                 return;
 935
 936         if (urb->status == 0) {
 937                 hdev->stat.byte_rx += urb->actual_length;
 938
 939                 if (data->recv_bulk(data, urb->transfer_buffer,
 940                                     urb->actual_length) < 0) {
 941                         bt_dev_err(hdev, "corrupted ACL packet");
 942                         hdev->stat.err_rx++;
 943                 }
 944         } else if (urb->status == -ENOENT) {
 945                 /* Avoid suspend failed when usb_kill_urb */
 946                 return;
 947         }
 948
 949         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
 950                 return;
 951
 952         usb_anchor_urb(urb, &data->bulk_anchor);
 953         usb_mark_last_busy(data->udev);
 954
 955         err = usb_submit_urb(urb, GFP_ATOMIC);
 956         if (err < 0) {
 957                 /* -EPERM: urb is being killed;
 958                  * -ENODEV: device got disconnected
 959                  */
 960                 if (err != -EPERM && err != -ENODEV)
 961                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
 962                                    urb, -err);
 963                 usb_unanchor_urb(urb);
 964         }
 965 }
 966
 967 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
 968 {
 969         struct btusb_data *data = hci_get_drvdata(hdev);
 970         struct urb *urb;
 971         unsigned char *buf;
 972         unsigned int pipe;
 973         int err, size = HCI_MAX_FRAME_SIZE;
 974
 975         BT_DBG("%s", hdev->name);
 976
 977         if (!data->bulk_rx_ep)
 978                 return -ENODEV;
 979
 980         urb = usb_alloc_urb(0, mem_flags);
 981         if (!urb)
 982                 return -ENOMEM;
 983
 984         buf = kmalloc(size, mem_flags);
 985         if (!buf) {
 986                 usb_free_urb(urb);
 987                 return -ENOMEM;
 988         }
 989
 990         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
 991
 992         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
 993                           btusb_bulk_complete, hdev);
 994
 995         urb->transfer_flags |= URB_FREE_BUFFER;
 996
 997         usb_mark_last_busy(data->udev);
 998         usb_anchor_urb(urb, &data->bulk_anchor);
 999
1000         err = usb_submit_urb(urb, mem_flags);
1001         if (err < 0) {
1002                 if (err != -EPERM && err != -ENODEV)
1003                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1004                                    urb, -err);
1005                 usb_unanchor_urb(urb);
1006         }
1007
1008         usb_free_urb(urb);
1009
1010         return err;
1011 }
1012
1013 static void btusb_isoc_complete(struct urb *urb)
1014 {
1015         struct hci_dev *hdev = urb->context;
1016         struct btusb_data *data = hci_get_drvdata(hdev);
1017         int i, err;
1018
1019         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1020                urb->actual_length);
1021
1022         if (!test_bit(HCI_RUNNING, &hdev->flags))
1023                 return;
1024
1025         if (urb->status == 0) {
1026                 for (i = 0; i < urb->number_of_packets; i++) {
1027                         unsigned int offset = urb->iso_frame_desc[i].offset;
1028                         unsigned int length = urb->iso_frame_desc[i].actual_length;
1029
1030                         if (urb->iso_frame_desc[i].status)
1031                                 continue;
1032
1033                         hdev->stat.byte_rx += length;
1034
1035                         if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
1036                                             length) < 0) {
1037                                 bt_dev_err(hdev, "corrupted SCO packet");
1038                                 hdev->stat.err_rx++;
1039                         }
1040                 }
1041         } else if (urb->status == -ENOENT) {
1042                 /* Avoid suspend failed when usb_kill_urb */
1043                 return;
1044         }
1045
1046         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
1047                 return;
1048
1049         usb_anchor_urb(urb, &data->isoc_anchor);
1050
1051         err = usb_submit_urb(urb, GFP_ATOMIC);
1052         if (err < 0) {
1053                 /* -EPERM: urb is being killed;
1054                  * -ENODEV: device got disconnected
1055                  */
1056                 if (err != -EPERM && err != -ENODEV)
1057                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1058                                    urb, -err);
1059                 usb_unanchor_urb(urb);
1060         }
1061 }
1062
1063 static inline void __fill_isoc_descriptor_msbc(struct urb *urb, int len,
1064                                                int mtu, struct btusb_data *data)
1065 {
1066         int i, offset = 0;
1067         unsigned int interval;
1068
1069         BT_DBG("len %d mtu %d", len, mtu);
1070
1071         /* For mSBC ALT 6 setting the host will send the packet at continuous
1072          * flow. As per core spec 5, vol 4, part B, table 2.1. For ALT setting
1073          * 6 the HCI PACKET INTERVAL should be 7.5ms for every usb packets.
1074          * To maintain the rate we send 63bytes of usb packets alternatively for
1075          * 7ms and 8ms to maintain the rate as 7.5ms.
1076          */
1077         if (data->usb_alt6_packet_flow) {
1078                 interval = 7;
1079                 data->usb_alt6_packet_flow = false;
1080         } else {
1081                 interval = 6;
1082                 data->usb_alt6_packet_flow = true;
1083         }
1084
1085         for (i = 0; i < interval; i++) {
1086                 urb->iso_frame_desc[i].offset = offset;
1087                 urb->iso_frame_desc[i].length = offset;
1088         }
1089
1090         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1091                 urb->iso_frame_desc[i].offset = offset;
1092                 urb->iso_frame_desc[i].length = len;
1093                 i++;
1094         }
1095
1096         urb->number_of_packets = i;
1097 }
1098
1099 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
1100 {
1101         int i, offset = 0;
1102
1103         BT_DBG("len %d mtu %d", len, mtu);
1104
1105         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
1106                                         i++, offset += mtu, len -= mtu) {
1107                 urb->iso_frame_desc[i].offset = offset;
1108                 urb->iso_frame_desc[i].length = mtu;
1109         }
1110
1111         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1112                 urb->iso_frame_desc[i].offset = offset;
1113                 urb->iso_frame_desc[i].length = len;
1114                 i++;
1115         }
1116
1117         urb->number_of_packets = i;
1118 }
1119
1120 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
1121 {
1122         struct btusb_data *data = hci_get_drvdata(hdev);
1123         struct urb *urb;
1124         unsigned char *buf;
1125         unsigned int pipe;
1126         int err, size;
1127
1128         BT_DBG("%s", hdev->name);
1129
1130         if (!data->isoc_rx_ep)
1131                 return -ENODEV;
1132
1133         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
1134         if (!urb)
1135                 return -ENOMEM;
1136
1137         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
1138                                                 BTUSB_MAX_ISOC_FRAMES;
1139
1140         buf = kmalloc(size, mem_flags);
1141         if (!buf) {
1142                 usb_free_urb(urb);
1143                 return -ENOMEM;
1144         }
1145
1146         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
1147
1148         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
1149                          hdev, data->isoc_rx_ep->bInterval);
1150
1151         urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
1152
1153         __fill_isoc_descriptor(urb, size,
1154                                le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
1155
1156         usb_anchor_urb(urb, &data->isoc_anchor);
1157
1158         err = usb_submit_urb(urb, mem_flags);
1159         if (err < 0) {
1160                 if (err != -EPERM && err != -ENODEV)
1161                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1162                                    urb, -err);
1163                 usb_unanchor_urb(urb);
1164         }
1165
1166         usb_free_urb(urb);
1167
1168         return err;
1169 }
1170
1171 static void btusb_diag_complete(struct urb *urb)
1172 {
1173         struct hci_dev *hdev = urb->context;
1174         struct btusb_data *data = hci_get_drvdata(hdev);
1175         int err;
1176
1177         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1178                urb->actual_length);
1179
1180         if (urb->status == 0) {
1181                 struct sk_buff *skb;
1182
1183                 skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
1184                 if (skb) {
1185                         skb_put_data(skb, urb->transfer_buffer,
1186                                      urb->actual_length);
1187                         hci_recv_diag(hdev, skb);
1188                 }
1189         } else if (urb->status == -ENOENT) {
1190                 /* Avoid suspend failed when usb_kill_urb */
1191                 return;
1192         }
1193
1194         if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
1195                 return;
1196
1197         usb_anchor_urb(urb, &data->diag_anchor);
1198         usb_mark_last_busy(data->udev);
1199
1200         err = usb_submit_urb(urb, GFP_ATOMIC);
1201         if (err < 0) {
1202                 /* -EPERM: urb is being killed;
1203                  * -ENODEV: device got disconnected
1204                  */
1205                 if (err != -EPERM && err != -ENODEV)
1206                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1207                                    urb, -err);
1208                 usb_unanchor_urb(urb);
1209         }
1210 }
1211
1212 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
1213 {
1214         struct btusb_data *data = hci_get_drvdata(hdev);
1215         struct urb *urb;
1216         unsigned char *buf;
1217         unsigned int pipe;
1218         int err, size = HCI_MAX_FRAME_SIZE;
1219
1220         BT_DBG("%s", hdev->name);
1221
1222         if (!data->diag_rx_ep)
1223                 return -ENODEV;
1224
1225         urb = usb_alloc_urb(0, mem_flags);
1226         if (!urb)
1227                 return -ENOMEM;
1228
1229         buf = kmalloc(size, mem_flags);
1230         if (!buf) {
1231                 usb_free_urb(urb);
1232                 return -ENOMEM;
1233         }
1234
1235         pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
1236
1237         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1238                           btusb_diag_complete, hdev);
1239
1240         urb->transfer_flags |= URB_FREE_BUFFER;
1241
1242         usb_mark_last_busy(data->udev);
1243         usb_anchor_urb(urb, &data->diag_anchor);
1244
1245         err = usb_submit_urb(urb, mem_flags);
1246         if (err < 0) {
1247                 if (err != -EPERM && err != -ENODEV)
1248                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1249                                    urb, -err);
1250                 usb_unanchor_urb(urb);
1251         }
1252
1253         usb_free_urb(urb);
1254
1255         return err;
1256 }
1257
1258 static void btusb_tx_complete(struct urb *urb)
1259 {
1260         struct sk_buff *skb = urb->context;
1261         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1262         struct btusb_data *data = hci_get_drvdata(hdev);
1263         unsigned long flags;
1264
1265         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1266                urb->actual_length);
1267
1268         if (!test_bit(HCI_RUNNING, &hdev->flags))
1269                 goto done;
1270
1271         if (!urb->status)
1272                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1273         else
1274                 hdev->stat.err_tx++;
1275
1276 done:
1277         spin_lock_irqsave(&data->txlock, flags);
1278         data->tx_in_flight--;
1279         spin_unlock_irqrestore(&data->txlock, flags);
1280
1281         kfree(urb->setup_packet);
1282
1283         kfree_skb(skb);
1284 }
1285
1286 static void btusb_isoc_tx_complete(struct urb *urb)
1287 {
1288         struct sk_buff *skb = urb->context;
1289         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1290
1291         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1292                urb->actual_length);
1293
1294         if (!test_bit(HCI_RUNNING, &hdev->flags))
1295                 goto done;
1296
1297         if (!urb->status)
1298                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1299         else
1300                 hdev->stat.err_tx++;
1301
1302 done:
1303         kfree(urb->setup_packet);
1304
1305         kfree_skb(skb);
1306 }
1307
1308 static int btusb_open(struct hci_dev *hdev)
1309 {
1310         struct btusb_data *data = hci_get_drvdata(hdev);
1311         int err;
1312
1313         BT_DBG("%s", hdev->name);
1314
1315         err = usb_autopm_get_interface(data->intf);
1316         if (err < 0)
1317                 return err;
1318
1319         /* Patching USB firmware files prior to starting any URBs of HCI path
1320          * It is more safe to use USB bulk channel for downloading USB patch
1321          */
1322         if (data->setup_on_usb) {
1323                 err = data->setup_on_usb(hdev);
1324                 if (err < 0)
1325                         goto setup_fail;
1326         }
1327
1328         data->intf->needs_remote_wakeup = 1;
1329
1330         /* Disable device remote wakeup when host is suspended
1331          * For Realtek chips, global suspend without
1332          * SET_FEATURE (DEVICE_REMOTE_WAKEUP) can save more power in device.
1333          */
1334         if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
1335                 device_wakeup_disable(&data->udev->dev);
1336
1337         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1338                 goto done;
1339
1340         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1341         if (err < 0)
1342                 goto failed;
1343
1344         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1345         if (err < 0) {
1346                 usb_kill_anchored_urbs(&data->intr_anchor);
1347                 goto failed;
1348         }
1349
1350         set_bit(BTUSB_BULK_RUNNING, &data->flags);
1351         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1352
1353         if (data->diag) {
1354                 if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1355                         set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1356         }
1357
1358 done:
1359         usb_autopm_put_interface(data->intf);
1360         return 0;
1361
1362 failed:
1363         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1364 setup_fail:
1365         usb_autopm_put_interface(data->intf);
1366         return err;
1367 }
1368
1369 static void btusb_stop_traffic(struct btusb_data *data)
1370 {
1371         usb_kill_anchored_urbs(&data->intr_anchor);
1372         usb_kill_anchored_urbs(&data->bulk_anchor);
1373         usb_kill_anchored_urbs(&data->isoc_anchor);
1374         usb_kill_anchored_urbs(&data->diag_anchor);
1375         usb_kill_anchored_urbs(&data->ctrl_anchor);
1376 }
1377
1378 static int btusb_close(struct hci_dev *hdev)
1379 {
1380         struct btusb_data *data = hci_get_drvdata(hdev);
1381         int err;
1382
1383         BT_DBG("%s", hdev->name);
1384
1385         cancel_work_sync(&data->work);
1386         cancel_work_sync(&data->waker);
1387
1388         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1389         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1390         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1391         clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1392
1393         btusb_stop_traffic(data);
1394         btusb_free_frags(data);
1395
1396         err = usb_autopm_get_interface(data->intf);
1397         if (err < 0)
1398                 goto failed;
1399
1400         data->intf->needs_remote_wakeup = 0;
1401
1402         /* Enable remote wake up for auto-suspend */
1403         if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
1404                 data->intf->needs_remote_wakeup = 1;
1405
1406         usb_autopm_put_interface(data->intf);
1407
1408 failed:
1409         usb_scuttle_anchored_urbs(&data->deferred);
1410         return 0;
1411 }
1412
1413 static int btusb_flush(struct hci_dev *hdev)
1414 {
1415         struct btusb_data *data = hci_get_drvdata(hdev);
1416
1417         BT_DBG("%s", hdev->name);
1418
1419         usb_kill_anchored_urbs(&data->tx_anchor);
1420         btusb_free_frags(data);
1421
1422         return 0;
1423 }
1424
1425 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1426 {
1427         struct btusb_data *data = hci_get_drvdata(hdev);
1428         struct usb_ctrlrequest *dr;
1429         struct urb *urb;
1430         unsigned int pipe;
1431
1432         urb = usb_alloc_urb(0, GFP_KERNEL);
1433         if (!urb)
1434                 return ERR_PTR(-ENOMEM);
1435
1436         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1437         if (!dr) {
1438                 usb_free_urb(urb);
1439                 return ERR_PTR(-ENOMEM);
1440         }
1441
1442         dr->bRequestType = data->cmdreq_type;
1443         dr->bRequest     = data->cmdreq;
1444         dr->wIndex       = 0;
1445         dr->wValue       = 0;
1446         dr->wLength      = __cpu_to_le16(skb->len);
1447
1448         pipe = usb_sndctrlpipe(data->udev, 0x00);
1449
1450         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1451                              skb->data, skb->len, btusb_tx_complete, skb);
1452
1453         skb->dev = (void *)hdev;
1454
1455         return urb;
1456 }
1457
1458 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1459 {
1460         struct btusb_data *data = hci_get_drvdata(hdev);
1461         struct urb *urb;
1462         unsigned int pipe;
1463
1464         if (!data->bulk_tx_ep)
1465                 return ERR_PTR(-ENODEV);
1466
1467         urb = usb_alloc_urb(0, GFP_KERNEL);
1468         if (!urb)
1469                 return ERR_PTR(-ENOMEM);
1470
1471         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1472
1473         usb_fill_bulk_urb(urb, data->udev, pipe,
1474                           skb->data, skb->len, btusb_tx_complete, skb);
1475
1476         skb->dev = (void *)hdev;
1477
1478         return urb;
1479 }
1480
1481 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1482 {
1483         struct btusb_data *data = hci_get_drvdata(hdev);
1484         struct urb *urb;
1485         unsigned int pipe;
1486
1487         if (!data->isoc_tx_ep)
1488                 return ERR_PTR(-ENODEV);
1489
1490         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1491         if (!urb)
1492                 return ERR_PTR(-ENOMEM);
1493
1494         pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1495
1496         usb_fill_int_urb(urb, data->udev, pipe,
1497                          skb->data, skb->len, btusb_isoc_tx_complete,
1498                          skb, data->isoc_tx_ep->bInterval);
1499
1500         urb->transfer_flags  = URB_ISO_ASAP;
1501
1502         if (data->isoc_altsetting == 6)
1503                 __fill_isoc_descriptor_msbc(urb, skb->len,
1504                                             le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize),
1505                                             data);
1506         else
1507                 __fill_isoc_descriptor(urb, skb->len,
1508                                        le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1509         skb->dev = (void *)hdev;
1510
1511         return urb;
1512 }
1513
1514 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1515 {
1516         struct btusb_data *data = hci_get_drvdata(hdev);
1517         int err;
1518
1519         usb_anchor_urb(urb, &data->tx_anchor);
1520
1521         err = usb_submit_urb(urb, GFP_KERNEL);
1522         if (err < 0) {
1523                 if (err != -EPERM && err != -ENODEV)
1524                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1525                                    urb, -err);
1526                 kfree(urb->setup_packet);
1527                 usb_unanchor_urb(urb);
1528         } else {
1529                 usb_mark_last_busy(data->udev);
1530         }
1531
1532         usb_free_urb(urb);
1533         return err;
1534 }
1535
1536 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1537 {
1538         struct btusb_data *data = hci_get_drvdata(hdev);
1539         unsigned long flags;
1540         bool suspending;
1541
1542         spin_lock_irqsave(&data->txlock, flags);
1543         suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1544         if (!suspending)
1545                 data->tx_in_flight++;
1546         spin_unlock_irqrestore(&data->txlock, flags);
1547
1548         if (!suspending)
1549                 return submit_tx_urb(hdev, urb);
1550
1551         usb_anchor_urb(urb, &data->deferred);
1552         schedule_work(&data->waker);
1553
1554         usb_free_urb(urb);
1555         return 0;
1556 }
1557
1558 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1559 {
1560         struct urb *urb;
1561
1562         BT_DBG("%s", hdev->name);
1563
1564         switch (hci_skb_pkt_type(skb)) {
1565         case HCI_COMMAND_PKT:
1566                 urb = alloc_ctrl_urb(hdev, skb);
1567                 if (IS_ERR(urb))
1568                         return PTR_ERR(urb);
1569
1570                 hdev->stat.cmd_tx++;
1571                 return submit_or_queue_tx_urb(hdev, urb);
1572
1573         case HCI_ACLDATA_PKT:
1574                 urb = alloc_bulk_urb(hdev, skb);
1575                 if (IS_ERR(urb))
1576                         return PTR_ERR(urb);
1577
1578                 hdev->stat.acl_tx++;
1579                 return submit_or_queue_tx_urb(hdev, urb);
1580
1581         case HCI_SCODATA_PKT:
1582                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1583                         return -ENODEV;
1584
1585                 urb = alloc_isoc_urb(hdev, skb);
1586                 if (IS_ERR(urb))
1587                         return PTR_ERR(urb);
1588
1589                 hdev->stat.sco_tx++;
1590                 return submit_tx_urb(hdev, urb);
1591         }
1592
1593         return -EILSEQ;
1594 }
1595
1596 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1597 {
1598         struct btusb_data *data = hci_get_drvdata(hdev);
1599
1600         BT_DBG("%s evt %d", hdev->name, evt);
1601
1602         if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1603                 data->sco_num = hci_conn_num(hdev, SCO_LINK);
1604                 data->air_mode = evt;
1605                 schedule_work(&data->work);
1606         }
1607 }
1608
1609 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1610 {
1611         struct btusb_data *data = hci_get_drvdata(hdev);
1612         struct usb_interface *intf = data->isoc;
1613         struct usb_endpoint_descriptor *ep_desc;
1614         int i, err;
1615
1616         if (!data->isoc)
1617                 return -ENODEV;
1618
1619         err = usb_set_interface(data->udev, data->isoc_ifnum, altsetting);
1620         if (err < 0) {
1621                 bt_dev_err(hdev, "setting interface failed (%d)", -err);
1622                 return err;
1623         }
1624
1625         data->isoc_altsetting = altsetting;
1626
1627         data->isoc_tx_ep = NULL;
1628         data->isoc_rx_ep = NULL;
1629
1630         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1631                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1632
1633                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1634                         data->isoc_tx_ep = ep_desc;
1635                         continue;
1636                 }
1637
1638                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1639                         data->isoc_rx_ep = ep_desc;
1640                         continue;
1641                 }
1642         }
1643
1644         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1645                 bt_dev_err(hdev, "invalid SCO descriptors");
1646                 return -ENODEV;
1647         }
1648
1649         return 0;
1650 }
1651
1652 static int btusb_switch_alt_setting(struct hci_dev *hdev, int new_alts)
1653 {
1654         struct btusb_data *data = hci_get_drvdata(hdev);
1655         int err;
1656
1657         if (data->isoc_altsetting != new_alts) {
1658                 unsigned long flags;
1659
1660                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1661                 usb_kill_anchored_urbs(&data->isoc_anchor);
1662
1663                 /* When isochronous alternate setting needs to be
1664                  * changed, because SCO connection has been added
1665                  * or removed, a packet fragment may be left in the
1666                  * reassembling state. This could lead to wrongly
1667                  * assembled fragments.
1668                  *
1669                  * Clear outstanding fragment when selecting a new
1670                  * alternate setting.
1671                  */
1672                 spin_lock_irqsave(&data->rxlock, flags);
1673                 kfree_skb(data->sco_skb);
1674                 data->sco_skb = NULL;
1675                 spin_unlock_irqrestore(&data->rxlock, flags);
1676
1677                 err = __set_isoc_interface(hdev, new_alts);
1678                 if (err < 0)
1679                         return err;
1680         }
1681
1682         if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1683                 if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1684                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1685                 else
1686                         btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1687         }
1688
1689         return 0;
1690 }
1691
1692 static struct usb_host_interface *btusb_find_altsetting(struct btusb_data *data,
1693                                                         int alt)
1694 {
1695         struct usb_interface *intf = data->isoc;
1696         int i;
1697
1698         BT_DBG("Looking for Alt no :%d", alt);
1699
1700         if (!intf)
1701                 return NULL;
1702
1703         for (i = 0; i < intf->num_altsetting; i++) {
1704                 if (intf->altsetting[i].desc.bAlternateSetting == alt)
1705                         return &intf->altsetting[i];
1706         }
1707
1708         return NULL;
1709 }
1710
1711 static void btusb_work(struct work_struct *work)
1712 {
1713         struct btusb_data *data = container_of(work, struct btusb_data, work);
1714         struct hci_dev *hdev = data->hdev;
1715         int new_alts = 0;
1716         int err;
1717
1718         if (data->sco_num > 0) {
1719                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1720                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1721                         if (err < 0) {
1722                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1723                                 usb_kill_anchored_urbs(&data->isoc_anchor);
1724                                 return;
1725                         }
1726
1727                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1728                 }
1729
1730                 if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_CVSD) {
1731                         if (hdev->voice_setting & 0x0020) {
1732                                 static const int alts[3] = { 2, 4, 5 };
1733
1734                                 new_alts = alts[data->sco_num - 1];
1735                         } else {
1736                                 new_alts = data->sco_num;
1737                         }
1738                 } else if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_TRANSP) {
1739                         /* Check if Alt 6 is supported for Transparent audio */
1740                         if (btusb_find_altsetting(data, 6)) {
1741                                 data->usb_alt6_packet_flow = true;
1742                                 new_alts = 6;
1743                         } else if (test_bit(BTUSB_USE_ALT1_FOR_WBS, &data->flags)) {
1744                                 new_alts = 1;
1745                         } else {
1746                                 bt_dev_err(hdev, "Device does not support ALT setting 6");
1747                         }
1748                 }
1749
1750                 if (btusb_switch_alt_setting(hdev, new_alts) < 0)
1751                         bt_dev_err(hdev, "set USB alt:(%d) failed!", new_alts);
1752         } else {
1753                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1754                 usb_kill_anchored_urbs(&data->isoc_anchor);
1755
1756                 __set_isoc_interface(hdev, 0);
1757                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1758                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1759         }
1760 }
1761
1762 static void btusb_waker(struct work_struct *work)
1763 {
1764         struct btusb_data *data = container_of(work, struct btusb_data, waker);
1765         int err;
1766
1767         err = usb_autopm_get_interface(data->intf);
1768         if (err < 0)
1769                 return;
1770
1771         usb_autopm_put_interface(data->intf);
1772 }
1773
1774 static int btusb_setup_bcm92035(struct hci_dev *hdev)
1775 {
1776         struct sk_buff *skb;
1777         u8 val = 0x00;
1778
1779         BT_DBG("%s", hdev->name);
1780
1781         skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
1782         if (IS_ERR(skb))
1783                 bt_dev_err(hdev, "BCM92035 command failed (%ld)", PTR_ERR(skb));
1784         else
1785                 kfree_skb(skb);
1786
1787         return 0;
1788 }
1789
1790 static int btusb_setup_csr(struct hci_dev *hdev)
1791 {
1792         struct hci_rp_read_local_version *rp;
1793         struct sk_buff *skb;
1794         bool is_fake = false;
1795
1796         BT_DBG("%s", hdev->name);
1797
1798         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
1799                              HCI_INIT_TIMEOUT);
1800         if (IS_ERR(skb)) {
1801                 int err = PTR_ERR(skb);
1802                 bt_dev_err(hdev, "CSR: Local version failed (%d)", err);
1803                 return err;
1804         }
1805
1806         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
1807                 bt_dev_err(hdev, "CSR: Local version length mismatch");
1808                 kfree_skb(skb);
1809                 return -EIO;
1810         }
1811
1812         rp = (struct hci_rp_read_local_version *)skb->data;
1813
1814         /* Detect a wide host of Chinese controllers that aren't CSR.
1815          *
1816          * Known fake bcdDevices: 0x0100, 0x0134, 0x1915, 0x2520, 0x7558, 0x8891
1817          *
1818          * The main thing they have in common is that these are really popular low-cost
1819          * options that support newer Bluetooth versions but rely on heavy VID/PID
1820          * squatting of this poor old Bluetooth 1.1 device. Even sold as such.
1821          *
1822          * We detect actual CSR devices by checking that the HCI manufacturer code
1823          * is Cambridge Silicon Radio (10) and ensuring that LMP sub-version and
1824          * HCI rev values always match. As they both store the firmware number.
1825          */
1826         if (le16_to_cpu(rp->manufacturer) != 10 ||
1827             le16_to_cpu(rp->hci_rev) != le16_to_cpu(rp->lmp_subver))
1828                 is_fake = true;
1829
1830         /* Known legit CSR firmware build numbers and their supported BT versions:
1831          * - 1.1 (0x1) -> 0x0073, 0x020d, 0x033c, 0x034e
1832          * - 1.2 (0x2) ->                 0x04d9, 0x0529
1833          * - 2.0 (0x3) ->         0x07a6, 0x07ad, 0x0c5c
1834          * - 2.1 (0x4) ->         0x149c, 0x1735, 0x1899 (0x1899 is a BlueCore4-External)
1835          * - 4.0 (0x6) ->         0x1d86, 0x2031, 0x22bb
1836          *
1837          * e.g. Real CSR dongles with LMP subversion 0x73 are old enough that
1838          *      support BT 1.1 only; so it's a dead giveaway when some
1839          *      third-party BT 4.0 dongle reuses it.
1840          */
1841         else if (le16_to_cpu(rp->lmp_subver) <= 0x034e &&
1842                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_1)
1843                 is_fake = true;
1844
1845         else if (le16_to_cpu(rp->lmp_subver) <= 0x0529 &&
1846                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_2)
1847                 is_fake = true;
1848
1849         else if (le16_to_cpu(rp->lmp_subver) <= 0x0c5c &&
1850                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_0)
1851                 is_fake = true;
1852
1853         else if (le16_to_cpu(rp->lmp_subver) <= 0x1899 &&
1854                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_1)
1855                 is_fake = true;
1856
1857         else if (le16_to_cpu(rp->lmp_subver) <= 0x22bb &&
1858                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_4_0)
1859                 is_fake = true;
1860
1861         if (is_fake) {
1862                 bt_dev_warn(hdev, "CSR: Unbranded CSR clone detected; adding workarounds...");
1863
1864                 /* Generally these clones have big discrepancies between
1865                  * advertised features and what's actually supported.
1866                  * Probably will need to be expanded in the future;
1867                  * without these the controller will lock up.
1868                  */
1869                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
1870                 set_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks);
1871
1872                 /* Clear the reset quirk since this is not an actual
1873                  * early Bluetooth 1.1 device from CSR.
1874                  */
1875                 clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1876                 clear_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
1877         }
1878
1879         kfree_skb(skb);
1880
1881         return 0;
1882 }
1883
1884 static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
1885                                                        struct intel_version *ver)
1886 {
1887         const struct firmware *fw;
1888         char fwname[64];
1889         int ret;
1890
1891         snprintf(fwname, sizeof(fwname),
1892                  "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
1893                  ver->hw_platform, ver->hw_variant, ver->hw_revision,
1894                  ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
1895                  ver->fw_build_ww, ver->fw_build_yy);
1896
1897         ret = request_firmware(&fw, fwname, &hdev->dev);
1898         if (ret < 0) {
1899                 if (ret == -EINVAL) {
1900                         bt_dev_err(hdev, "Intel firmware file request failed (%d)",
1901                                    ret);
1902                         return NULL;
1903                 }
1904
1905                 bt_dev_err(hdev, "failed to open Intel firmware file: %s (%d)",
1906                            fwname, ret);
1907
1908                 /* If the correct firmware patch file is not found, use the
1909                  * default firmware patch file instead
1910                  */
1911                 snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
1912                          ver->hw_platform, ver->hw_variant);
1913                 if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
1914                         bt_dev_err(hdev, "failed to open default fw file: %s",
1915                                    fwname);
1916                         return NULL;
1917                 }
1918         }
1919
1920         bt_dev_info(hdev, "Intel Bluetooth firmware file: %s", fwname);
1921
1922         return fw;
1923 }
1924
1925 static int btusb_setup_intel_patching(struct hci_dev *hdev,
1926                                       const struct firmware *fw,
1927                                       const u8 **fw_ptr, int *disable_patch)
1928 {
1929         struct sk_buff *skb;
1930         struct hci_command_hdr *cmd;
1931         const u8 *cmd_param;
1932         struct hci_event_hdr *evt = NULL;
1933         const u8 *evt_param = NULL;
1934         int remain = fw->size - (*fw_ptr - fw->data);
1935
1936         /* The first byte indicates the types of the patch command or event.
1937          * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
1938          * in the current firmware buffer doesn't start with 0x01 or
1939          * the size of remain buffer is smaller than HCI command header,
1940          * the firmware file is corrupted and it should stop the patching
1941          * process.
1942          */
1943         if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
1944                 bt_dev_err(hdev, "Intel fw corrupted: invalid cmd read");
1945                 return -EINVAL;
1946         }
1947         (*fw_ptr)++;
1948         remain--;
1949
1950         cmd = (struct hci_command_hdr *)(*fw_ptr);
1951         *fw_ptr += sizeof(*cmd);
1952         remain -= sizeof(*cmd);
1953
1954         /* Ensure that the remain firmware data is long enough than the length
1955          * of command parameter. If not, the firmware file is corrupted.
1956          */
1957         if (remain < cmd->plen) {
1958                 bt_dev_err(hdev, "Intel fw corrupted: invalid cmd len");
1959                 return -EFAULT;
1960         }
1961
1962         /* If there is a command that loads a patch in the firmware
1963          * file, then enable the patch upon success, otherwise just
1964          * disable the manufacturer mode, for example patch activation
1965          * is not required when the default firmware patch file is used
1966          * because there are no patch data to load.
1967          */
1968         if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
1969                 *disable_patch = 0;
1970
1971         cmd_param = *fw_ptr;
1972         *fw_ptr += cmd->plen;
1973         remain -= cmd->plen;
1974
1975         /* This reads the expected events when the above command is sent to the
1976          * device. Some vendor commands expects more than one events, for
1977          * example command status event followed by vendor specific event.
1978          * For this case, it only keeps the last expected event. so the command
1979          * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
1980          * last expected event.
1981          */
1982         while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
1983                 (*fw_ptr)++;
1984                 remain--;
1985
1986                 evt = (struct hci_event_hdr *)(*fw_ptr);
1987                 *fw_ptr += sizeof(*evt);
1988                 remain -= sizeof(*evt);
1989
1990                 if (remain < evt->plen) {
1991                         bt_dev_err(hdev, "Intel fw corrupted: invalid evt len");
1992                         return -EFAULT;
1993                 }
1994
1995                 evt_param = *fw_ptr;
1996                 *fw_ptr += evt->plen;
1997                 remain -= evt->plen;
1998         }
1999
2000         /* Every HCI commands in the firmware file has its correspond event.
2001          * If event is not found or remain is smaller than zero, the firmware
2002          * file is corrupted.
2003          */
2004         if (!evt || !evt_param || remain < 0) {
2005                 bt_dev_err(hdev, "Intel fw corrupted: invalid evt read");
2006                 return -EFAULT;
2007         }
2008
2009         skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
2010                                 cmd_param, evt->evt, HCI_INIT_TIMEOUT);
2011         if (IS_ERR(skb)) {
2012                 bt_dev_err(hdev, "sending Intel patch command (0x%4.4x) failed (%ld)",
2013                            cmd->opcode, PTR_ERR(skb));
2014                 return PTR_ERR(skb);
2015         }
2016
2017         /* It ensures that the returned event matches the event data read from
2018          * the firmware file. At fist, it checks the length and then
2019          * the contents of the event.
2020          */
2021         if (skb->len != evt->plen) {
2022                 bt_dev_err(hdev, "mismatch event length (opcode 0x%4.4x)",
2023                            le16_to_cpu(cmd->opcode));
2024                 kfree_skb(skb);
2025                 return -EFAULT;
2026         }
2027
2028         if (memcmp(skb->data, evt_param, evt->plen)) {
2029                 bt_dev_err(hdev, "mismatch event parameter (opcode 0x%4.4x)",
2030                            le16_to_cpu(cmd->opcode));
2031                 kfree_skb(skb);
2032                 return -EFAULT;
2033         }
2034         kfree_skb(skb);
2035
2036         return 0;
2037 }
2038
2039 static int btusb_setup_intel(struct hci_dev *hdev)
2040 {
2041         struct sk_buff *skb;
2042         const struct firmware *fw;
2043         const u8 *fw_ptr;
2044         int disable_patch, err;
2045         struct intel_version ver;
2046
2047         BT_DBG("%s", hdev->name);
2048
2049         /* The controller has a bug with the first HCI command sent to it
2050          * returning number of completed commands as zero. This would stall the
2051          * command processing in the Bluetooth core.
2052          *
2053          * As a workaround, send HCI Reset command first which will reset the
2054          * number of completed commands and allow normal command processing
2055          * from now on.
2056          */
2057         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
2058         if (IS_ERR(skb)) {
2059                 bt_dev_err(hdev, "sending initial HCI reset command failed (%ld)",
2060                            PTR_ERR(skb));
2061                 return PTR_ERR(skb);
2062         }
2063         kfree_skb(skb);
2064
2065         /* Read Intel specific controller version first to allow selection of
2066          * which firmware file to load.
2067          *
2068          * The returned information are hardware variant and revision plus
2069          * firmware variant, revision and build number.
2070          */
2071         err = btintel_read_version(hdev, &ver);
2072         if (err)
2073                 return err;
2074
2075         bt_dev_info(hdev, "read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
2076                     ver.hw_platform, ver.hw_variant, ver.hw_revision,
2077                     ver.fw_variant,  ver.fw_revision, ver.fw_build_num,
2078                     ver.fw_build_ww, ver.fw_build_yy, ver.fw_patch_num);
2079
2080         /* fw_patch_num indicates the version of patch the device currently
2081          * have. If there is no patch data in the device, it is always 0x00.
2082          * So, if it is other than 0x00, no need to patch the device again.
2083          */
2084         if (ver.fw_patch_num) {
2085                 bt_dev_info(hdev, "Intel device is already patched. "
2086                             "patch num: %02x", ver.fw_patch_num);
2087                 goto complete;
2088         }
2089
2090         /* Opens the firmware patch file based on the firmware version read
2091          * from the controller. If it fails to open the matching firmware
2092          * patch file, it tries to open the default firmware patch file.
2093          * If no patch file is found, allow the device to operate without
2094          * a patch.
2095          */
2096         fw = btusb_setup_intel_get_fw(hdev, &ver);
2097         if (!fw)
2098                 goto complete;
2099         fw_ptr = fw->data;
2100
2101         /* Enable the manufacturer mode of the controller.
2102          * Only while this mode is enabled, the driver can download the
2103          * firmware patch data and configuration parameters.
2104          */
2105         err = btintel_enter_mfg(hdev);
2106         if (err) {
2107                 release_firmware(fw);
2108                 return err;
2109         }
2110
2111         disable_patch = 1;
2112
2113         /* The firmware data file consists of list of Intel specific HCI
2114          * commands and its expected events. The first byte indicates the
2115          * type of the message, either HCI command or HCI event.
2116          *
2117          * It reads the command and its expected event from the firmware file,
2118          * and send to the controller. Once __hci_cmd_sync_ev() returns,
2119          * the returned event is compared with the event read from the firmware
2120          * file and it will continue until all the messages are downloaded to
2121          * the controller.
2122          *
2123          * Once the firmware patching is completed successfully,
2124          * the manufacturer mode is disabled with reset and activating the
2125          * downloaded patch.
2126          *
2127          * If the firmware patching fails, the manufacturer mode is
2128          * disabled with reset and deactivating the patch.
2129          *
2130          * If the default patch file is used, no reset is done when disabling
2131          * the manufacturer.
2132          */
2133         while (fw->size > fw_ptr - fw->data) {
2134                 int ret;
2135
2136                 ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
2137                                                  &disable_patch);
2138                 if (ret < 0)
2139                         goto exit_mfg_deactivate;
2140         }
2141
2142         release_firmware(fw);
2143
2144         if (disable_patch)
2145                 goto exit_mfg_disable;
2146
2147         /* Patching completed successfully and disable the manufacturer mode
2148          * with reset and activate the downloaded firmware patches.
2149          */
2150         err = btintel_exit_mfg(hdev, true, true);
2151         if (err)
2152                 return err;
2153
2154         /* Need build number for downloaded fw patches in
2155          * every power-on boot
2156          */
2157        err = btintel_read_version(hdev, &ver);
2158        if (err)
2159                return err;
2160        bt_dev_info(hdev, "Intel BT fw patch 0x%02x completed & activated",
2161                    ver.fw_patch_num);
2162
2163         goto complete;
2164
2165 exit_mfg_disable:
2166         /* Disable the manufacturer mode without reset */
2167         err = btintel_exit_mfg(hdev, false, false);
2168         if (err)
2169                 return err;
2170
2171         bt_dev_info(hdev, "Intel firmware patch completed");
2172
2173         goto complete;
2174
2175 exit_mfg_deactivate:
2176         release_firmware(fw);
2177
2178         /* Patching failed. Disable the manufacturer mode with reset and
2179          * deactivate the downloaded firmware patches.
2180          */
2181         err = btintel_exit_mfg(hdev, true, false);
2182         if (err)
2183                 return err;
2184
2185         bt_dev_info(hdev, "Intel firmware patch completed and deactivated");
2186
2187 complete:
2188         /* Set the event mask for Intel specific vendor events. This enables
2189          * a few extra events that are useful during general operation.
2190          */
2191         btintel_set_event_mask_mfg(hdev, false);
2192
2193         btintel_check_bdaddr(hdev);
2194         return 0;
2195 }
2196
2197 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
2198 {
2199         struct sk_buff *skb;
2200         struct hci_event_hdr *hdr;
2201         struct hci_ev_cmd_complete *evt;
2202
2203         skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
2204         if (!skb)
2205                 return -ENOMEM;
2206
2207         hdr = skb_put(skb, sizeof(*hdr));
2208         hdr->evt = HCI_EV_CMD_COMPLETE;
2209         hdr->plen = sizeof(*evt) + 1;
2210
2211         evt = skb_put(skb, sizeof(*evt));
2212         evt->ncmd = 0x01;
2213         evt->opcode = cpu_to_le16(opcode);
2214
2215         skb_put_u8(skb, 0x00);
2216
2217         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2218
2219         return hci_recv_frame(hdev, skb);
2220 }
2221
2222 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
2223                                  int count)
2224 {
2225         /* When the device is in bootloader mode, then it can send
2226          * events via the bulk endpoint. These events are treated the
2227          * same way as the ones received from the interrupt endpoint.
2228          */
2229         if (test_bit(BTUSB_BOOTLOADER, &data->flags))
2230                 return btusb_recv_intr(data, buffer, count);
2231
2232         return btusb_recv_bulk(data, buffer, count);
2233 }
2234
2235 static void btusb_intel_bootup(struct btusb_data *data, const void *ptr,
2236                                unsigned int len)
2237 {
2238         const struct intel_bootup *evt = ptr;
2239
2240         if (len != sizeof(*evt))
2241                 return;
2242
2243         if (test_and_clear_bit(BTUSB_BOOTING, &data->flags))
2244                 wake_up_bit(&data->flags, BTUSB_BOOTING);
2245 }
2246
2247 static void btusb_intel_secure_send_result(struct btusb_data *data,
2248                                            const void *ptr, unsigned int len)
2249 {
2250         const struct intel_secure_send_result *evt = ptr;
2251
2252         if (len != sizeof(*evt))
2253                 return;
2254
2255         if (evt->result)
2256                 set_bit(BTUSB_FIRMWARE_FAILED, &data->flags);
2257
2258         if (test_and_clear_bit(BTUSB_DOWNLOADING, &data->flags) &&
2259             test_bit(BTUSB_FIRMWARE_LOADED, &data->flags))
2260                 wake_up_bit(&data->flags, BTUSB_DOWNLOADING);
2261 }
2262
2263 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
2264 {
2265         struct btusb_data *data = hci_get_drvdata(hdev);
2266
2267         if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
2268                 struct hci_event_hdr *hdr = (void *)skb->data;
2269
2270                 if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
2271                     hdr->plen > 0) {
2272                         const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
2273                         unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
2274
2275                         switch (skb->data[2]) {
2276                         case 0x02:
2277                                 /* When switching to the operational firmware
2278                                  * the device sends a vendor specific event
2279                                  * indicating that the bootup completed.
2280                                  */
2281                                 btusb_intel_bootup(data, ptr, len);
2282                                 break;
2283                         case 0x06:
2284                                 /* When the firmware loading completes the
2285                                  * device sends out a vendor specific event
2286                                  * indicating the result of the firmware
2287                                  * loading.
2288                                  */
2289                                 btusb_intel_secure_send_result(data, ptr, len);
2290                                 break;
2291                         }
2292                 }
2293         }
2294
2295         return hci_recv_frame(hdev, skb);
2296 }
2297
2298 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
2299 {
2300         struct btusb_data *data = hci_get_drvdata(hdev);
2301         struct urb *urb;
2302
2303         BT_DBG("%s", hdev->name);
2304
2305         switch (hci_skb_pkt_type(skb)) {
2306         case HCI_COMMAND_PKT:
2307                 if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
2308                         struct hci_command_hdr *cmd = (void *)skb->data;
2309                         __u16 opcode = le16_to_cpu(cmd->opcode);
2310
2311                         /* When in bootloader mode and the command 0xfc09
2312                          * is received, it needs to be send down the
2313                          * bulk endpoint. So allocate a bulk URB instead.
2314                          */
2315                         if (opcode == 0xfc09)
2316                                 urb = alloc_bulk_urb(hdev, skb);
2317                         else
2318                                 urb = alloc_ctrl_urb(hdev, skb);
2319
2320                         /* When the 0xfc01 command is issued to boot into
2321                          * the operational firmware, it will actually not
2322                          * send a command complete event. To keep the flow
2323                          * control working inject that event here.
2324                          */
2325                         if (opcode == 0xfc01)
2326                                 inject_cmd_complete(hdev, opcode);
2327                 } else {
2328                         urb = alloc_ctrl_urb(hdev, skb);
2329                 }
2330                 if (IS_ERR(urb))
2331                         return PTR_ERR(urb);
2332
2333                 hdev->stat.cmd_tx++;
2334                 return submit_or_queue_tx_urb(hdev, urb);
2335
2336         case HCI_ACLDATA_PKT:
2337                 urb = alloc_bulk_urb(hdev, skb);
2338                 if (IS_ERR(urb))
2339                         return PTR_ERR(urb);
2340
2341                 hdev->stat.acl_tx++;
2342                 return submit_or_queue_tx_urb(hdev, urb);
2343
2344         case HCI_SCODATA_PKT:
2345                 if (hci_conn_num(hdev, SCO_LINK) < 1)
2346                         return -ENODEV;
2347
2348                 urb = alloc_isoc_urb(hdev, skb);
2349                 if (IS_ERR(urb))
2350                         return PTR_ERR(urb);
2351
2352                 hdev->stat.sco_tx++;
2353                 return submit_tx_urb(hdev, urb);
2354         }
2355
2356         return -EILSEQ;
2357 }
2358
2359 static bool btusb_setup_intel_new_get_fw_name(struct intel_version *ver,
2360                                              struct intel_boot_params *params,
2361                                              char *fw_name, size_t len,
2362                                              const char *suffix)
2363 {
2364         switch (ver->hw_variant) {
2365         case 0x0b:      /* SfP */
2366         case 0x0c:      /* WsP */
2367                 snprintf(fw_name, len, "intel/ibt-%u-%u.%s",
2368                         le16_to_cpu(ver->hw_variant),
2369                         le16_to_cpu(params->dev_revid),
2370                         suffix);
2371                 break;
2372         case 0x11:      /* JfP */
2373         case 0x12:      /* ThP */
2374         case 0x13:      /* HrP */
2375         case 0x14:      /* CcP */
2376                 snprintf(fw_name, len, "intel/ibt-%u-%u-%u.%s",
2377                         le16_to_cpu(ver->hw_variant),
2378                         le16_to_cpu(ver->hw_revision),
2379                         le16_to_cpu(ver->fw_revision),
2380                         suffix);
2381                 break;
2382         default:
2383                 return false;
2384         }
2385         return true;
2386 }
2387
2388 static void btusb_setup_intel_newgen_get_fw_name(const struct intel_version_tlv *ver_tlv,
2389                                                  char *fw_name, size_t len,
2390                                                  const char *suffix)
2391 {
2392         /* The firmware file name for new generation controllers will be
2393          * ibt-<cnvi_top type+cnvi_top step>-<cnvr_top type+cnvr_top step>
2394          */
2395         snprintf(fw_name, len, "intel/ibt-%04x-%04x.%s",
2396                  INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver_tlv->cnvi_top),
2397                                           INTEL_CNVX_TOP_STEP(ver_tlv->cnvi_top)),
2398                  INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver_tlv->cnvr_top),
2399                                           INTEL_CNVX_TOP_STEP(ver_tlv->cnvr_top)),
2400                  suffix);
2401 }
2402
2403 static int btusb_intel_download_firmware(struct hci_dev *hdev,
2404                                          struct intel_version *ver,
2405                                          struct intel_boot_params *params,
2406                                          u32 *boot_param)
2407 {
2408         const struct firmware *fw;
2409         char fwname[64];
2410         int err;
2411         struct btusb_data *data = hci_get_drvdata(hdev);
2412
2413         if (!ver || !params)
2414                 return -EINVAL;
2415
2416         /* The hardware platform number has a fixed value of 0x37 and
2417          * for now only accept this single value.
2418          */
2419         if (ver->hw_platform != 0x37) {
2420                 bt_dev_err(hdev, "Unsupported Intel hardware platform (%u)",
2421                            ver->hw_platform);
2422                 return -EINVAL;
2423         }
2424
2425         /* Check for supported iBT hardware variants of this firmware
2426          * loading method.
2427          *
2428          * This check has been put in place to ensure correct forward
2429          * compatibility options when newer hardware variants come along.
2430          */
2431         switch (ver->hw_variant) {
2432         case 0x0b:      /* SfP */
2433         case 0x0c:      /* WsP */
2434         case 0x11:      /* JfP */
2435         case 0x12:      /* ThP */
2436         case 0x13:      /* HrP */
2437         case 0x14:      /* CcP */
2438                 break;
2439         default:
2440                 bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
2441                            ver->hw_variant);
2442                 return -EINVAL;
2443         }
2444
2445         btintel_version_info(hdev, ver);
2446
2447         /* The firmware variant determines if the device is in bootloader
2448          * mode or is running operational firmware. The value 0x06 identifies
2449          * the bootloader and the value 0x23 identifies the operational
2450          * firmware.
2451          *
2452          * When the operational firmware is already present, then only
2453          * the check for valid Bluetooth device address is needed. This
2454          * determines if the device will be added as configured or
2455          * unconfigured controller.
2456          *
2457          * It is not possible to use the Secure Boot Parameters in this
2458          * case since that command is only available in bootloader mode.
2459          */
2460         if (ver->fw_variant == 0x23) {
2461                 clear_bit(BTUSB_BOOTLOADER, &data->flags);
2462                 btintel_check_bdaddr(hdev);
2463                 return 0;
2464         }
2465
2466         /* If the device is not in bootloader mode, then the only possible
2467          * choice is to return an error and abort the device initialization.
2468          */
2469         if (ver->fw_variant != 0x06) {
2470                 bt_dev_err(hdev, "Unsupported Intel firmware variant (%u)",
2471                            ver->fw_variant);
2472                 return -ENODEV;
2473         }
2474
2475         /* Read the secure boot parameters to identify the operating
2476          * details of the bootloader.
2477          */
2478         err = btintel_read_boot_params(hdev, params);
2479         if (err)
2480                 return err;
2481
2482         /* It is required that every single firmware fragment is acknowledged
2483          * with a command complete event. If the boot parameters indicate
2484          * that this bootloader does not send them, then abort the setup.
2485          */
2486         if (params->limited_cce != 0x00) {
2487                 bt_dev_err(hdev, "Unsupported Intel firmware loading method (%u)",
2488                            params->limited_cce);
2489                 return -EINVAL;
2490         }
2491
2492         /* If the OTP has no valid Bluetooth device address, then there will
2493          * also be no valid address for the operational firmware.
2494          */
2495         if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
2496                 bt_dev_info(hdev, "No device address configured");
2497                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
2498         }
2499
2500         /* With this Intel bootloader only the hardware variant and device
2501          * revision information are used to select the right firmware for SfP
2502          * and WsP.
2503          *
2504          * The firmware filename is ibt-<hw_variant>-<dev_revid>.sfi.
2505          *
2506          * Currently the supported hardware variants are:
2507          *   11 (0x0b) for iBT3.0 (LnP/SfP)
2508          *   12 (0x0c) for iBT3.5 (WsP)
2509          *
2510          * For ThP/JfP and for future SKU's, the FW name varies based on HW
2511          * variant, HW revision and FW revision, as these are dependent on CNVi
2512          * and RF Combination.
2513          *
2514          *   17 (0x11) for iBT3.5 (JfP)
2515          *   18 (0x12) for iBT3.5 (ThP)
2516          *
2517          * The firmware file name for these will be
2518          * ibt-<hw_variant>-<hw_revision>-<fw_revision>.sfi.
2519          *
2520          */
2521         err = btusb_setup_intel_new_get_fw_name(ver, params, fwname,
2522                                                 sizeof(fwname), "sfi");
2523         if (!err) {
2524                 bt_dev_err(hdev, "Unsupported Intel firmware naming");
2525                 return -EINVAL;
2526         }
2527
2528         err = request_firmware(&fw, fwname, &hdev->dev);
2529         if (err < 0) {
2530                 bt_dev_err(hdev, "Failed to load Intel firmware file (%d)", err);
2531                 return err;
2532         }
2533
2534         bt_dev_info(hdev, "Found device firmware: %s", fwname);
2535
2536         if (fw->size < 644) {
2537                 bt_dev_err(hdev, "Invalid size of firmware file (%zu)",
2538                            fw->size);
2539                 err = -EBADF;
2540                 goto done;
2541         }
2542
2543         set_bit(BTUSB_DOWNLOADING, &data->flags);
2544
2545         /* Start firmware downloading and get boot parameter */
2546         err = btintel_download_firmware(hdev, fw, boot_param);
2547         if (err < 0) {
2548                 /* When FW download fails, send Intel Reset to retry
2549                  * FW download.
2550                  */
2551                 btintel_reset_to_bootloader(hdev);
2552                 goto done;
2553         }
2554         set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
2555
2556         bt_dev_info(hdev, "Waiting for firmware download to complete");
2557
2558         /* Before switching the device into operational mode and with that
2559          * booting the loaded firmware, wait for the bootloader notification
2560          * that all fragments have been successfully received.
2561          *
2562          * When the event processing receives the notification, then the
2563          * BTUSB_DOWNLOADING flag will be cleared.
2564          *
2565          * The firmware loading should not take longer than 5 seconds
2566          * and thus just timeout if that happens and fail the setup
2567          * of this device.
2568          */
2569         err = wait_on_bit_timeout(&data->flags, BTUSB_DOWNLOADING,
2570                                   TASK_INTERRUPTIBLE,
2571                                   msecs_to_jiffies(5000));
2572         if (err == -EINTR) {
2573                 bt_dev_err(hdev, "Firmware loading interrupted");
2574                 goto done;
2575         }
2576
2577         if (err) {
2578                 bt_dev_err(hdev, "Firmware loading timeout");
2579                 err = -ETIMEDOUT;
2580                 btintel_reset_to_bootloader(hdev);
2581                 goto done;
2582         }
2583
2584         if (test_bit(BTUSB_FIRMWARE_FAILED, &data->flags)) {
2585                 bt_dev_err(hdev, "Firmware loading failed");
2586                 err = -ENOEXEC;
2587                 goto done;
2588         }
2589
2590 done:
2591         release_firmware(fw);
2592         return err;
2593 }
2594
2595 static int btusb_setup_intel_new(struct hci_dev *hdev)
2596 {
2597         struct btusb_data *data = hci_get_drvdata(hdev);
2598         struct intel_version ver;
2599         struct intel_boot_params params;
2600         u32 boot_param;
2601         char ddcname[64];
2602         ktime_t calltime, delta, rettime;
2603         unsigned long long duration;
2604         int err;
2605         struct intel_debug_features features;
2606
2607         BT_DBG("%s", hdev->name);
2608
2609         /* Set the default boot parameter to 0x0 and it is updated to
2610          * SKU specific boot parameter after reading Intel_Write_Boot_Params
2611          * command while downloading the firmware.
2612          */
2613         boot_param = 0x00000000;
2614
2615         calltime = ktime_get();
2616
2617         /* Read the Intel version information to determine if the device
2618          * is in bootloader mode or if it already has operational firmware
2619          * loaded.
2620          */
2621         err = btintel_read_version(hdev, &ver);
2622         if (err) {
2623                 bt_dev_err(hdev, "Intel Read version failed (%d)", err);
2624                 btintel_reset_to_bootloader(hdev);
2625                 return err;
2626         }
2627
2628         err = btusb_intel_download_firmware(hdev, &ver, &params, &boot_param);
2629         if (err)
2630                 return err;
2631
2632         /* controller is already having an operational firmware */
2633         if (ver.fw_variant == 0x23)
2634                 goto finish;
2635
2636         rettime = ktime_get();
2637         delta = ktime_sub(rettime, calltime);
2638         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2639
2640         bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration);
2641
2642         calltime = ktime_get();
2643
2644         set_bit(BTUSB_BOOTING, &data->flags);
2645
2646         err = btintel_send_intel_reset(hdev, boot_param);
2647         if (err) {
2648                 bt_dev_err(hdev, "Intel Soft Reset failed (%d)", err);
2649                 btintel_reset_to_bootloader(hdev);
2650                 return err;
2651         }
2652
2653         /* The bootloader will not indicate when the device is ready. This
2654          * is done by the operational firmware sending bootup notification.
2655          *
2656          * Booting into operational firmware should not take longer than
2657          * 1 second. However if that happens, then just fail the setup
2658          * since something went wrong.
2659          */
2660         bt_dev_info(hdev, "Waiting for device to boot");
2661
2662         err = wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,
2663                                   TASK_INTERRUPTIBLE,
2664                                   msecs_to_jiffies(1000));
2665
2666         if (err == -EINTR) {
2667                 bt_dev_err(hdev, "Device boot interrupted");
2668                 return -EINTR;
2669         }
2670
2671         if (err) {
2672                 bt_dev_err(hdev, "Device boot timeout");
2673                 btintel_reset_to_bootloader(hdev);
2674                 return -ETIMEDOUT;
2675         }
2676
2677         rettime = ktime_get();
2678         delta = ktime_sub(rettime, calltime);
2679         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2680
2681         bt_dev_info(hdev, "Device booted in %llu usecs", duration);
2682
2683         clear_bit(BTUSB_BOOTLOADER, &data->flags);
2684
2685         err = btusb_setup_intel_new_get_fw_name(&ver, &params, ddcname,
2686                                                 sizeof(ddcname), "ddc");
2687
2688         if (!err) {
2689                 bt_dev_err(hdev, "Unsupported Intel firmware naming");
2690         } else {
2691                 /* Once the device is running in operational mode, it needs to
2692                  * apply the device configuration (DDC) parameters.
2693                  *
2694                  * The device can work without DDC parameters, so even if it
2695                  * fails to load the file, no need to fail the setup.
2696                  */
2697                 btintel_load_ddc_config(hdev, ddcname);
2698         }
2699
2700         /* Read the Intel supported features and if new exception formats
2701          * supported, need to load the additional DDC config to enable.
2702          */
2703         btintel_read_debug_features(hdev, &features);
2704
2705         /* Set DDC mask for available debug features */
2706         btintel_set_debug_features(hdev, &features);
2707
2708         /* Read the Intel version information after loading the FW  */
2709         err = btintel_read_version(hdev, &ver);
2710         if (err)
2711                 return err;
2712
2713         btintel_version_info(hdev, &ver);
2714
2715 finish:
2716         /* All Intel controllers that support the Microsoft vendor
2717          * extension are using 0xFC1E for VsMsftOpCode.
2718          */
2719         switch (ver.hw_variant) {
2720         case 0x12:      /* ThP */
2721                 hci_set_msft_opcode(hdev, 0xFC1E);
2722                 break;
2723         }
2724
2725         /* Set the event mask for Intel specific vendor events. This enables
2726          * a few extra events that are useful during general operation. It
2727          * does not enable any debugging related events.
2728          *
2729          * The device will function correctly without these events enabled
2730          * and thus no need to fail the setup.
2731          */
2732         btintel_set_event_mask(hdev, false);
2733
2734         return 0;
2735 }
2736
2737 static int btusb_setup_intel_newgen(struct hci_dev *hdev)
2738 {
2739         struct btusb_data *data = hci_get_drvdata(hdev);
2740         u32 boot_param;
2741         char ddcname[64];
2742         ktime_t calltime, delta, rettime;
2743         unsigned long long duration;
2744         int err;
2745         struct intel_debug_features features;
2746         struct intel_version_tlv version;
2747
2748         bt_dev_dbg(hdev, "");
2749
2750         /* Set the default boot parameter to 0x0 and it is updated to
2751          * SKU specific boot parameter after reading Intel_Write_Boot_Params
2752          * command while downloading the firmware.
2753          */
2754         boot_param = 0x00000000;
2755
2756         calltime = ktime_get();
2757
2758         /* Read the Intel version information to determine if the device
2759          * is in bootloader mode or if it already has operational firmware
2760          * loaded.
2761          */
2762         err = btintel_read_version_tlv(hdev, &version);
2763         if (err) {
2764                 bt_dev_err(hdev, "Intel Read version failed (%d)", err);
2765                 btintel_reset_to_bootloader(hdev);
2766                 return err;
2767         }
2768
2769         btintel_version_info_tlv(hdev, &version);
2770
2771         /* check if controller is already having an operational firmware */
2772         if (version.img_type == 0x03)
2773                 goto finish;
2774
2775         rettime = ktime_get();
2776         delta = ktime_sub(rettime, calltime);
2777         duration = (unsigned long long)ktime_to_ns(delta) >> 10;
2778
2779         bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration);
2780
2781         calltime = ktime_get();
2782
2783         set_bit(BTUSB_BOOTING, &data->flags);
2784
2785         err = btintel_send_intel_reset(hdev, boot_param);
2786         if (err) {
2787                 bt_dev_err(hdev, "Intel Soft Reset failed (%d)", err);
2788                 btintel_reset_to_bootloader(hdev);
2789                 return err;
2790         }
2791
2792         /* The bootloader will not indicate when the device is ready. This
2793          * is done by the operational firmware sending bootup notification.
2794          *
2795          * Booting into operational firmware should not take longer than
2796          * 1 second. However if that happens, then just fail the setup
2797          * since something went wrong.
2798          */
2799         bt_dev_info(hdev, "Waiting for device to boot");
2800
2801         err = wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,
2802                                   TASK_INTERRUPTIBLE,
2803                                   msecs_to_jiffies(1000));
2804
2805         if (err == -EINTR) {
2806                 bt_dev_err(hdev, "Device boot interrupted");
2807                 return -EINTR;
2808         }
2809
2810         if (err) {
2811                 bt_dev_err(hdev, "Device boot timeout");
2812                 btintel_reset_to_bootloader(hdev);
2813                 return -ETIMEDOUT;
2814         }
2815
2816         rettime = ktime_get();
2817         delta = ktime_sub(rettime, calltime);
2818         duration = (unsigned long long)ktime_to_ns(delta) >> 10;
2819
2820         bt_dev_info(hdev, "Device booted in %llu usecs", duration);
2821
2822         clear_bit(BTUSB_BOOTLOADER, &data->flags);
2823
2824         btusb_setup_intel_newgen_get_fw_name(&version, ddcname, sizeof(ddcname),
2825                                              "ddc");
2826         /* Once the device is running in operational mode, it needs to
2827          * apply the device configuration (DDC) parameters.
2828          *
2829          * The device can work without DDC parameters, so even if it
2830          * fails to load the file, no need to fail the setup.
2831          */
2832         btintel_load_ddc_config(hdev, ddcname);
2833
2834         /* Read the Intel supported features and if new exception formats
2835          * supported, need to load the additional DDC config to enable.
2836          */
2837         btintel_read_debug_features(hdev, &features);
2838
2839         /* Set DDC mask for available debug features */
2840         btintel_set_debug_features(hdev, &features);
2841
2842         /* Read the Intel version information after loading the FW  */
2843         err = btintel_read_version_tlv(hdev, &version);
2844         if (err)
2845                 return err;
2846
2847         btintel_version_info_tlv(hdev, &version);
2848
2849 finish:
2850         /* Set the event mask for Intel specific vendor events. This enables
2851          * a few extra events that are useful during general operation. It
2852          * does not enable any debugging related events.
2853          *
2854          * The device will function correctly without these events enabled
2855          * and thus no need to fail the setup.
2856          */
2857         btintel_set_event_mask(hdev, false);
2858
2859         return 0;
2860 }
2861 static int btusb_shutdown_intel(struct hci_dev *hdev)
2862 {
2863         struct sk_buff *skb;
2864         long ret;
2865
2866         /* In the shutdown sequence where Bluetooth is turned off followed
2867          * by WiFi being turned off, turning WiFi back on causes issue with
2868          * the RF calibration.
2869          *
2870          * To ensure that any RF activity has been stopped, issue HCI Reset
2871          * command to clear all ongoing activity including advertising,
2872          * scanning etc.
2873          */
2874         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
2875         if (IS_ERR(skb)) {
2876                 ret = PTR_ERR(skb);
2877                 bt_dev_err(hdev, "HCI reset during shutdown failed");
2878                 return ret;
2879         }
2880         kfree_skb(skb);
2881
2882         /* Some platforms have an issue with BT LED when the interface is
2883          * down or BT radio is turned off, which takes 5 seconds to BT LED
2884          * goes off. This command turns off the BT LED immediately.
2885          */
2886         skb = __hci_cmd_sync(hdev, 0xfc3f, 0, NULL, HCI_INIT_TIMEOUT);
2887         if (IS_ERR(skb)) {
2888                 ret = PTR_ERR(skb);
2889                 bt_dev_err(hdev, "turning off Intel device LED failed");
2890                 return ret;
2891         }
2892         kfree_skb(skb);
2893
2894         return 0;
2895 }
2896
2897 static int btusb_shutdown_intel_new(struct hci_dev *hdev)
2898 {
2899         struct sk_buff *skb;
2900
2901         /* Send HCI Reset to the controller to stop any BT activity which
2902          * were triggered. This will help to save power and maintain the
2903          * sync b/w Host and controller
2904          */
2905         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
2906         if (IS_ERR(skb)) {
2907                 bt_dev_err(hdev, "HCI reset during shutdown failed");
2908                 return PTR_ERR(skb);
2909         }
2910         kfree_skb(skb);
2911
2912         return 0;
2913 }
2914
2915 #define FIRMWARE_MT7663         "mediatek/mt7663pr2h.bin"
2916 #define FIRMWARE_MT7668         "mediatek/mt7668pr2h.bin"
2917
2918 #define HCI_WMT_MAX_EVENT_SIZE          64
2919
2920 enum {
2921         BTMTK_WMT_PATCH_DWNLD = 0x1,
2922         BTMTK_WMT_FUNC_CTRL = 0x6,
2923         BTMTK_WMT_RST = 0x7,
2924         BTMTK_WMT_SEMAPHORE = 0x17,
2925 };
2926
2927 enum {
2928         BTMTK_WMT_INVALID,
2929         BTMTK_WMT_PATCH_UNDONE,
2930         BTMTK_WMT_PATCH_DONE,
2931         BTMTK_WMT_ON_UNDONE,
2932         BTMTK_WMT_ON_DONE,
2933         BTMTK_WMT_ON_PROGRESS,
2934 };
2935
2936 struct btmtk_wmt_hdr {
2937         u8      dir;
2938         u8      op;
2939         __le16  dlen;
2940         u8      flag;
2941 } __packed;
2942
2943 struct btmtk_hci_wmt_cmd {
2944         struct btmtk_wmt_hdr hdr;
2945         u8 data[256];
2946 } __packed;
2947
2948 struct btmtk_hci_wmt_evt {
2949         struct hci_event_hdr hhdr;
2950         struct btmtk_wmt_hdr whdr;
2951 } __packed;
2952
2953 struct btmtk_hci_wmt_evt_funcc {
2954         struct btmtk_hci_wmt_evt hwhdr;
2955         __be16 status;
2956 } __packed;
2957
2958 struct btmtk_tci_sleep {
2959         u8 mode;
2960         __le16 duration;
2961         __le16 host_duration;
2962         u8 host_wakeup_pin;
2963         u8 time_compensation;
2964 } __packed;
2965
2966 struct btmtk_hci_wmt_params {
2967         u8 op;
2968         u8 flag;
2969         u16 dlen;
2970         const void *data;
2971         u32 *status;
2972 };
2973
2974 static void btusb_mtk_wmt_recv(struct urb *urb)
2975 {
2976         struct hci_dev *hdev = urb->context;
2977         struct btusb_data *data = hci_get_drvdata(hdev);
2978         struct hci_event_hdr *hdr;
2979         struct sk_buff *skb;
2980         int err;
2981
2982         if (urb->status == 0 && urb->actual_length > 0) {
2983                 hdev->stat.byte_rx += urb->actual_length;
2984
2985                 /* WMT event shouldn't be fragmented and the size should be
2986                  * less than HCI_WMT_MAX_EVENT_SIZE.
2987                  */
2988                 skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
2989                 if (!skb) {
2990                         hdev->stat.err_rx++;
2991                         goto err_out;
2992                 }
2993
2994                 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2995                 skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
2996
2997                 hdr = (void *)skb->data;
2998                 /* Fix up the vendor event id with 0xff for vendor specific
2999                  * instead of 0xe4 so that event send via monitoring socket can
3000                  * be parsed properly.
3001                  */
3002                 hdr->evt = 0xff;
3003
3004                 /* When someone waits for the WMT event, the skb is being cloned
3005                  * and being processed the events from there then.
3006                  */
3007                 if (test_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags)) {
3008                         data->evt_skb = skb_clone(skb, GFP_ATOMIC);
3009                         if (!data->evt_skb)
3010                                 goto err_out;
3011                 }
3012
3013                 err = hci_recv_frame(hdev, skb);
3014                 if (err < 0)
3015                         goto err_free_skb;
3016
3017                 if (test_and_clear_bit(BTUSB_TX_WAIT_VND_EVT,
3018                                        &data->flags)) {
3019                         /* Barrier to sync with other CPUs */
3020                         smp_mb__after_atomic();
3021                         wake_up_bit(&data->flags,
3022                                     BTUSB_TX_WAIT_VND_EVT);
3023                 }
3024 err_out:
3025                 return;
3026 err_free_skb:
3027                 kfree_skb(data->evt_skb);
3028                 data->evt_skb = NULL;
3029                 return;
3030         } else if (urb->status == -ENOENT) {
3031                 /* Avoid suspend failed when usb_kill_urb */
3032                 return;
3033         }
3034
3035         usb_mark_last_busy(data->udev);
3036
3037         /* The URB complete handler is still called with urb->actual_length = 0
3038          * when the event is not available, so we should keep re-submitting
3039          * URB until WMT event returns, Also, It's necessary to wait some time
3040          * between the two consecutive control URBs to relax the target device
3041          * to generate the event. Otherwise, the WMT event cannot return from
3042          * the device successfully.
3043          */
3044         udelay(100);
3045
3046         usb_anchor_urb(urb, &data->ctrl_anchor);
3047         err = usb_submit_urb(urb, GFP_ATOMIC);
3048         if (err < 0) {
3049                 /* -EPERM: urb is being killed;
3050                  * -ENODEV: device got disconnected
3051                  */
3052                 if (err != -EPERM && err != -ENODEV)
3053                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
3054                                    urb, -err);
3055                 usb_unanchor_urb(urb);
3056         }
3057 }
3058
3059 static int btusb_mtk_submit_wmt_recv_urb(struct hci_dev *hdev)
3060 {
3061         struct btusb_data *data = hci_get_drvdata(hdev);
3062         struct usb_ctrlrequest *dr;
3063         unsigned char *buf;
3064         int err, size = 64;
3065         unsigned int pipe;
3066         struct urb *urb;
3067
3068         urb = usb_alloc_urb(0, GFP_KERNEL);
3069         if (!urb)
3070                 return -ENOMEM;
3071
3072         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
3073         if (!dr) {
3074                 usb_free_urb(urb);
3075                 return -ENOMEM;
3076         }
3077
3078         dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
3079         dr->bRequest     = 1;
3080         dr->wIndex       = cpu_to_le16(0);
3081         dr->wValue       = cpu_to_le16(48);
3082         dr->wLength      = cpu_to_le16(size);
3083
3084         buf = kmalloc(size, GFP_KERNEL);
3085         if (!buf) {
3086                 kfree(dr);
3087                 usb_free_urb(urb);
3088                 return -ENOMEM;
3089         }
3090
3091         pipe = usb_rcvctrlpipe(data->udev, 0);
3092
3093         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
3094                              buf, size, btusb_mtk_wmt_recv, hdev);
3095
3096         urb->transfer_flags |= URB_FREE_BUFFER;
3097
3098         usb_anchor_urb(urb, &data->ctrl_anchor);
3099         err = usb_submit_urb(urb, GFP_KERNEL);
3100         if (err < 0) {
3101                 if (err != -EPERM && err != -ENODEV)
3102                         bt_dev_err(hdev, "urb %p submission failed (%d)",
3103                                    urb, -err);
3104                 usb_unanchor_urb(urb);
3105         }
3106
3107         usb_free_urb(urb);
3108
3109         return err;
3110 }
3111
3112 static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
3113                                   struct btmtk_hci_wmt_params *wmt_params)
3114 {
3115         struct btusb_data *data = hci_get_drvdata(hdev);
3116         struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
3117         u32 hlen, status = BTMTK_WMT_INVALID;
3118         struct btmtk_hci_wmt_evt *wmt_evt;
3119         struct btmtk_hci_wmt_cmd wc;
3120         struct btmtk_wmt_hdr *hdr;
3121         int err;
3122
3123         /* Submit control IN URB on demand to process the WMT event */
3124         err = btusb_mtk_submit_wmt_recv_urb(hdev);
3125         if (err < 0)
3126                 return err;
3127
3128         /* Send the WMT command and wait until the WMT event returns */
3129         hlen = sizeof(*hdr) + wmt_params->dlen;
3130         if (hlen > 255)
3131                 return -EINVAL;
3132
3133         hdr = (struct btmtk_wmt_hdr *)&wc;
3134         hdr->dir = 1;
3135         hdr->op = wmt_params->op;
3136         hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
3137         hdr->flag = wmt_params->flag;
3138         memcpy(wc.data, wmt_params->data, wmt_params->dlen);
3139
3140         set_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
3141
3142         err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc);
3143
3144         if (err < 0) {
3145                 clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
3146                 return err;
3147         }
3148
3149         /* The vendor specific WMT commands are all answered by a vendor
3150          * specific event and will have the Command Status or Command
3151          * Complete as with usual HCI command flow control.
3152          *
3153          * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
3154          * state to be cleared. The driver specific event receive routine
3155          * will clear that state and with that indicate completion of the
3156          * WMT command.
3157          */
3158         err = wait_on_bit_timeout(&data->flags, BTUSB_TX_WAIT_VND_EVT,
3159                                   TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
3160         if (err == -EINTR) {
3161                 bt_dev_err(hdev, "Execution of wmt command interrupted");
3162                 clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
3163                 return err;
3164         }
3165
3166         if (err) {
3167                 bt_dev_err(hdev, "Execution of wmt command timed out");
3168                 clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
3169                 return -ETIMEDOUT;
3170         }
3171
3172         /* Parse and handle the return WMT event */
3173         wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
3174         if (wmt_evt->whdr.op != hdr->op) {
3175                 bt_dev_err(hdev, "Wrong op received %d expected %d",
3176                            wmt_evt->whdr.op, hdr->op);
3177                 err = -EIO;
3178                 goto err_free_skb;
3179         }
3180
3181         switch (wmt_evt->whdr.op) {
3182         case BTMTK_WMT_SEMAPHORE:
3183                 if (wmt_evt->whdr.flag == 2)
3184                         status = BTMTK_WMT_PATCH_UNDONE;
3185                 else
3186                         status = BTMTK_WMT_PATCH_DONE;
3187                 break;
3188         case BTMTK_WMT_FUNC_CTRL:
3189                 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
3190                 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
3191                         status = BTMTK_WMT_ON_DONE;
3192                 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
3193                         status = BTMTK_WMT_ON_PROGRESS;
3194                 else
3195                         status = BTMTK_WMT_ON_UNDONE;
3196                 break;
3197         }
3198
3199         if (wmt_params->status)
3200                 *wmt_params->status = status;
3201
3202 err_free_skb:
3203         kfree_skb(data->evt_skb);
3204         data->evt_skb = NULL;
3205
3206         return err;
3207 }
3208
3209 static int btusb_mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
3210 {
3211         struct btmtk_hci_wmt_params wmt_params;
3212         const struct firmware *fw;
3213         const u8 *fw_ptr;
3214         size_t fw_size;
3215         int err, dlen;
3216         u8 flag, param;
3217
3218         err = request_firmware(&fw, fwname, &hdev->dev);
3219         if (err < 0) {
3220                 bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
3221                 return err;
3222         }
3223
3224         /* Power on data RAM the firmware relies on. */
3225         param = 1;
3226         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3227         wmt_params.flag = 3;
3228         wmt_params.dlen = sizeof(param);
3229         wmt_params.data = &param;
3230         wmt_params.status = NULL;
3231
3232         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3233         if (err < 0) {
3234                 bt_dev_err(hdev, "Failed to power on data RAM (%d)", err);
3235                 goto err_release_fw;
3236         }
3237
3238         fw_ptr = fw->data;
3239         fw_size = fw->size;
3240
3241         /* The size of patch header is 30 bytes, should be skip */
3242         if (fw_size < 30) {
3243                 err = -EINVAL;
3244                 goto err_release_fw;
3245         }
3246
3247         fw_size -= 30;
3248         fw_ptr += 30;
3249         flag = 1;
3250
3251         wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
3252         wmt_params.status = NULL;
3253
3254         while (fw_size > 0) {
3255                 dlen = min_t(int, 250, fw_size);
3256
3257                 /* Tell deivice the position in sequence */
3258                 if (fw_size - dlen <= 0)
3259                         flag = 3;
3260                 else if (fw_size < fw->size - 30)
3261                         flag = 2;
3262
3263                 wmt_params.flag = flag;
3264                 wmt_params.dlen = dlen;
3265                 wmt_params.data = fw_ptr;
3266
3267                 err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3268                 if (err < 0) {
3269                         bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
3270                                    err);
3271                         goto err_release_fw;
3272                 }
3273
3274                 fw_size -= dlen;
3275                 fw_ptr += dlen;
3276         }
3277
3278         wmt_params.op = BTMTK_WMT_RST;
3279         wmt_params.flag = 4;
3280         wmt_params.dlen = 0;
3281         wmt_params.data = NULL;
3282         wmt_params.status = NULL;
3283
3284         /* Activate funciton the firmware providing to */
3285         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3286         if (err < 0) {
3287                 bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
3288                 goto err_release_fw;
3289         }
3290
3291         /* Wait a few moments for firmware activation done */
3292         usleep_range(10000, 12000);
3293
3294 err_release_fw:
3295         release_firmware(fw);
3296
3297         return err;
3298 }
3299
3300 static int btusb_mtk_func_query(struct hci_dev *hdev)
3301 {
3302         struct btmtk_hci_wmt_params wmt_params;
3303         int status, err;
3304         u8 param = 0;
3305
3306         /* Query whether the function is enabled */
3307         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3308         wmt_params.flag = 4;
3309         wmt_params.dlen = sizeof(param);
3310         wmt_params.data = &param;
3311         wmt_params.status = &status;
3312
3313         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3314         if (err < 0) {
3315                 bt_dev_err(hdev, "Failed to query function status (%d)", err);
3316                 return err;
3317         }
3318
3319         return status;
3320 }
3321
3322 static int btusb_mtk_reg_read(struct btusb_data *data, u32 reg, u32 *val)
3323 {
3324         int pipe, err, size = sizeof(u32);
3325         void *buf;
3326
3327         buf = kzalloc(size, GFP_KERNEL);
3328         if (!buf)
3329                 return -ENOMEM;
3330
3331         pipe = usb_rcvctrlpipe(data->udev, 0);
3332         err = usb_control_msg(data->udev, pipe, 0x63,
3333                               USB_TYPE_VENDOR | USB_DIR_IN,
3334                               reg >> 16, reg & 0xffff,
3335                               buf, size, USB_CTRL_SET_TIMEOUT);
3336         if (err < 0)
3337                 goto err_free_buf;
3338
3339         *val = get_unaligned_le32(buf);
3340
3341 err_free_buf:
3342         kfree(buf);
3343
3344         return err;
3345 }
3346
3347 static int btusb_mtk_id_get(struct btusb_data *data, u32 *id)
3348 {
3349         return btusb_mtk_reg_read(data, 0x80000008, id);
3350 }
3351
3352 static int btusb_mtk_setup(struct hci_dev *hdev)
3353 {
3354         struct btusb_data *data = hci_get_drvdata(hdev);
3355         struct btmtk_hci_wmt_params wmt_params;
3356         ktime_t calltime, delta, rettime;
3357         struct btmtk_tci_sleep tci_sleep;
3358         unsigned long long duration;
3359         struct sk_buff *skb;
3360         const char *fwname;
3361         int err, status;
3362         u32 dev_id;
3363         u8 param;
3364
3365         calltime = ktime_get();
3366
3367         err = btusb_mtk_id_get(data, &dev_id);
3368         if (err < 0) {
3369                 bt_dev_err(hdev, "Failed to get device id (%d)", err);
3370                 return err;
3371         }
3372
3373         switch (dev_id) {
3374         case 0x7663:
3375                 fwname = FIRMWARE_MT7663;
3376                 break;
3377         case 0x7668:
3378                 fwname = FIRMWARE_MT7668;
3379                 break;
3380         default:
3381                 bt_dev_err(hdev, "Unsupported support hardware variant (%08x)",
3382                            dev_id);
3383                 return -ENODEV;
3384         }
3385
3386         /* Query whether the firmware is already download */
3387         wmt_params.op = BTMTK_WMT_SEMAPHORE;
3388         wmt_params.flag = 1;
3389         wmt_params.dlen = 0;
3390         wmt_params.data = NULL;
3391         wmt_params.status = &status;
3392
3393         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3394         if (err < 0) {
3395                 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
3396                 return err;
3397         }
3398
3399         if (status == BTMTK_WMT_PATCH_DONE) {
3400                 bt_dev_info(hdev, "firmware already downloaded");
3401                 goto ignore_setup_fw;
3402         }
3403
3404         /* Setup a firmware which the device definitely requires */
3405         err = btusb_mtk_setup_firmware(hdev, fwname);
3406         if (err < 0)
3407                 return err;
3408
3409 ignore_setup_fw:
3410         err = readx_poll_timeout(btusb_mtk_func_query, hdev, status,
3411                                  status < 0 || status != BTMTK_WMT_ON_PROGRESS,
3412                                  2000, 5000000);
3413         /* -ETIMEDOUT happens */
3414         if (err < 0)
3415                 return err;
3416
3417         /* The other errors happen in btusb_mtk_func_query */
3418         if (status < 0)
3419                 return status;
3420
3421         if (status == BTMTK_WMT_ON_DONE) {
3422                 bt_dev_info(hdev, "function already on");
3423                 goto ignore_func_on;
3424         }
3425
3426         /* Enable Bluetooth protocol */
3427         param = 1;
3428         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3429         wmt_params.flag = 0;
3430         wmt_params.dlen = sizeof(param);
3431         wmt_params.data = &param;
3432         wmt_params.status = NULL;
3433
3434         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3435         if (err < 0) {
3436                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
3437                 return err;
3438         }
3439
3440 ignore_func_on:
3441         /* Apply the low power environment setup */
3442         tci_sleep.mode = 0x5;
3443         tci_sleep.duration = cpu_to_le16(0x640);
3444         tci_sleep.host_duration = cpu_to_le16(0x640);
3445         tci_sleep.host_wakeup_pin = 0;
3446         tci_sleep.time_compensation = 0;
3447
3448         skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
3449                              HCI_INIT_TIMEOUT);
3450         if (IS_ERR(skb)) {
3451                 err = PTR_ERR(skb);
3452                 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
3453                 return err;
3454         }
3455         kfree_skb(skb);
3456
3457         rettime = ktime_get();
3458         delta = ktime_sub(rettime, calltime);
3459         duration = (unsigned long long)ktime_to_ns(delta) >> 10;
3460
3461         bt_dev_info(hdev, "Device setup in %llu usecs", duration);
3462
3463         return 0;
3464 }
3465
3466 static int btusb_mtk_shutdown(struct hci_dev *hdev)
3467 {
3468         struct btmtk_hci_wmt_params wmt_params;
3469         u8 param = 0;
3470         int err;
3471
3472         /* Disable the device */
3473         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
3474         wmt_params.flag = 0;
3475         wmt_params.dlen = sizeof(param);
3476         wmt_params.data = &param;
3477         wmt_params.status = NULL;
3478
3479         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
3480         if (err < 0) {
3481                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
3482                 return err;
3483         }
3484
3485         return 0;
3486 }
3487
3488 MODULE_FIRMWARE(FIRMWARE_MT7663);
3489 MODULE_FIRMWARE(FIRMWARE_MT7668);
3490
3491 #ifdef CONFIG_PM
3492 /* Configure an out-of-band gpio as wake-up pin, if specified in device tree */
3493 static int marvell_config_oob_wake(struct hci_dev *hdev)
3494 {
3495         struct sk_buff *skb;
3496         struct btusb_data *data = hci_get_drvdata(hdev);
3497         struct device *dev = &data->udev->dev;
3498         u16 pin, gap, opcode;
3499         int ret;
3500         u8 cmd[5];
3501
3502         /* Move on if no wakeup pin specified */
3503         if (of_property_read_u16(dev->of_node, "marvell,wakeup-pin", &pin) ||
3504             of_property_read_u16(dev->of_node, "marvell,wakeup-gap-ms", &gap))
3505                 return 0;
3506
3507         /* Vendor specific command to configure a GPIO as wake-up pin */
3508         opcode = hci_opcode_pack(0x3F, 0x59);
3509         cmd[0] = opcode & 0xFF;
3510         cmd[1] = opcode >> 8;
3511         cmd[2] = 2; /* length of parameters that follow */
3512         cmd[3] = pin;
3513         cmd[4] = gap; /* time in ms, for which wakeup pin should be asserted */
3514
3515         skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
3516         if (!skb) {
3517                 bt_dev_err(hdev, "%s: No memory\n", __func__);
3518                 return -ENOMEM;
3519         }
3520
3521         skb_put_data(skb, cmd, sizeof(cmd));
3522         hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
3523
3524         ret = btusb_send_frame(hdev, skb);
3525         if (ret) {
3526                 bt_dev_err(hdev, "%s: configuration failed\n", __func__);
3527                 kfree_skb(skb);
3528                 return ret;
3529         }
3530
3531         return 0;
3532 }
3533 #endif
3534
3535 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
3536                                     const bdaddr_t *bdaddr)
3537 {
3538         struct sk_buff *skb;
3539         u8 buf[8];
3540         long ret;
3541
3542         buf[0] = 0xfe;
3543         buf[1] = sizeof(bdaddr_t);
3544         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
3545
3546         skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
3547         if (IS_ERR(skb)) {
3548                 ret = PTR_ERR(skb);
3549                 bt_dev_err(hdev, "changing Marvell device address failed (%ld)",
3550                            ret);
3551                 return ret;
3552         }
3553         kfree_skb(skb);
3554
3555         return 0;
3556 }
3557
3558 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
3559                                     const bdaddr_t *bdaddr)
3560 {
3561         struct sk_buff *skb;
3562         u8 buf[10];
3563         long ret;
3564
3565         buf[0] = 0x01;
3566         buf[1] = 0x01;
3567         buf[2] = 0x00;
3568         buf[3] = sizeof(bdaddr_t);
3569         memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
3570
3571         skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
3572         if (IS_ERR(skb)) {
3573                 ret = PTR_ERR(skb);
3574                 bt_dev_err(hdev, "Change address command failed (%ld)", ret);
3575                 return ret;
3576         }
3577         kfree_skb(skb);
3578
3579         return 0;
3580 }
3581
3582 static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev,
3583                                 const bdaddr_t *bdaddr)
3584 {
3585         struct sk_buff *skb;
3586         u8 buf[6];
3587         long ret;
3588
3589         memcpy(buf, bdaddr, sizeof(bdaddr_t));
3590
3591         skb = __hci_cmd_sync_ev(hdev, 0xfc14, sizeof(buf), buf,
3592                                 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
3593         if (IS_ERR(skb)) {
3594                 ret = PTR_ERR(skb);
3595                 bt_dev_err(hdev, "Change address command failed (%ld)", ret);
3596                 return ret;
3597         }
3598         kfree_skb(skb);
3599
3600         return 0;
3601 }
3602
3603 #define QCA_DFU_PACKET_LEN      4096
3604
3605 #define QCA_GET_TARGET_VERSION  0x09
3606 #define QCA_CHECK_STATUS        0x05
3607 #define QCA_DFU_DOWNLOAD        0x01
3608
3609 #define QCA_SYSCFG_UPDATED      0x40
3610 #define QCA_PATCH_UPDATED       0x80
3611 #define QCA_DFU_TIMEOUT         3000
3612
3613 struct qca_version {
3614         __le32  rom_version;
3615         __le32  patch_version;
3616         __le32  ram_version;
3617         __le32  ref_clock;
3618         __u8    reserved[4];
3619 } __packed;
3620
3621 struct qca_rampatch_version {
3622         __le16  rom_version_high;
3623         __le16  rom_version_low;
3624         __le16  patch_version;
3625 } __packed;
3626
3627 struct qca_device_info {
3628         u32     rom_version;
3629         u8      rampatch_hdr;   /* length of header in rampatch */
3630         u8      nvm_hdr;        /* length of header in NVM */
3631         u8      ver_offset;     /* offset of version structure in rampatch */
3632 };
3633
3634 static const struct qca_device_info qca_devices_table[] = {
3635         { 0x00000100, 20, 4,  8 }, /* Rome 1.0 */
3636         { 0x00000101, 20, 4,  8 }, /* Rome 1.1 */
3637         { 0x00000200, 28, 4, 16 }, /* Rome 2.0 */
3638         { 0x00000201, 28, 4, 16 }, /* Rome 2.1 */
3639         { 0x00000300, 28, 4, 16 }, /* Rome 3.0 */
3640         { 0x00000302, 28, 4, 16 }, /* Rome 3.2 */
3641         { 0x00130100, 40, 4, 16 }, /* WCN6855 1.0 */
3642         { 0x00130200, 40, 4, 16 }, /* WCN6855 2.0 */
3643 };
3644
3645 static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 request,
3646                                      void *data, u16 size)
3647 {
3648         int pipe, err;
3649         u8 *buf;
3650
3651         buf = kmalloc(size, GFP_KERNEL);
3652         if (!buf)
3653                 return -ENOMEM;
3654
3655         /* Found some of USB hosts have IOT issues with ours so that we should
3656          * not wait until HCI layer is ready.
3657          */
3658         pipe = usb_rcvctrlpipe(udev, 0);
3659         err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
3660                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3661         if (err < 0) {
3662                 dev_err(&udev->dev, "Failed to access otp area (%d)", err);
3663                 goto done;
3664         }
3665
3666         memcpy(data, buf, size);
3667
3668 done:
3669         kfree(buf);
3670
3671         return err;
3672 }
3673
3674 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
3675                                        const struct firmware *firmware,
3676                                        size_t hdr_size)
3677 {
3678         struct btusb_data *btdata = hci_get_drvdata(hdev);
3679         struct usb_device *udev = btdata->udev;
3680         size_t count, size, sent = 0;
3681         int pipe, len, err;
3682         u8 *buf;
3683
3684         buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
3685         if (!buf)
3686                 return -ENOMEM;
3687
3688         count = firmware->size;
3689
3690         size = min_t(size_t, count, hdr_size);
3691         memcpy(buf, firmware->data, size);
3692
3693         /* USB patches should go down to controller through USB path
3694          * because binary format fits to go down through USB channel.
3695          * USB control path is for patching headers and USB bulk is for
3696          * patch body.
3697          */
3698         pipe = usb_sndctrlpipe(udev, 0);
3699         err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
3700                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3701         if (err < 0) {
3702                 bt_dev_err(hdev, "Failed to send headers (%d)", err);
3703                 goto done;
3704         }
3705
3706         sent += size;
3707         count -= size;
3708
3709         while (count) {
3710                 size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
3711
3712                 memcpy(buf, firmware->data + sent, size);
3713
3714                 pipe = usb_sndbulkpipe(udev, 0x02);
3715                 err = usb_bulk_msg(udev, pipe, buf, size, &len,
3716                                    QCA_DFU_TIMEOUT);
3717                 if (err < 0) {
3718                         bt_dev_err(hdev, "Failed to send body at %zd of %zd (%d)",
3719                                    sent, firmware->size, err);
3720                         break;
3721                 }
3722
3723                 if (size != len) {
3724                         bt_dev_err(hdev, "Failed to get bulk buffer");
3725                         err = -EILSEQ;
3726                         break;
3727                 }
3728
3729                 sent  += size;
3730                 count -= size;
3731         }
3732
3733 done:
3734         kfree(buf);
3735         return err;
3736 }
3737
3738 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
3739                                          struct qca_version *ver,
3740                                          const struct qca_device_info *info)
3741 {
3742         struct qca_rampatch_version *rver;
3743         const struct firmware *fw;
3744         u32 ver_rom, ver_patch, rver_rom;
3745         u16 rver_rom_low, rver_rom_high, rver_patch;
3746         char fwname[64];
3747         int err;
3748
3749         ver_rom = le32_to_cpu(ver->rom_version);
3750         ver_patch = le32_to_cpu(ver->patch_version);
3751
3752         snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
3753
3754         err = request_firmware(&fw, fwname, &hdev->dev);
3755         if (err) {
3756                 bt_dev_err(hdev, "failed to request rampatch file: %s (%d)",
3757                            fwname, err);
3758                 return err;
3759         }
3760
3761         bt_dev_info(hdev, "using rampatch file: %s", fwname);
3762
3763         rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
3764         rver_rom_low = le16_to_cpu(rver->rom_version_low);
3765         rver_patch = le16_to_cpu(rver->patch_version);
3766
3767         if (ver_rom & ~0xffffU) {
3768                 rver_rom_high = le16_to_cpu(rver->rom_version_high);
3769                 rver_rom = le32_to_cpu(rver_rom_high << 16 | rver_rom_low);
3770         } else {
3771                 rver_rom = rver_rom_low;
3772         }
3773
3774         bt_dev_info(hdev, "QCA: patch rome 0x%x build 0x%x, "
3775                     "firmware rome 0x%x build 0x%x",
3776                     rver_rom, rver_patch, ver_rom, ver_patch);
3777
3778         if (rver_rom != ver_rom || rver_patch <= ver_patch) {
3779                 bt_dev_err(hdev, "rampatch file version did not match with firmware");
3780                 err = -EINVAL;
3781                 goto done;
3782         }
3783
3784         err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
3785
3786 done:
3787         release_firmware(fw);
3788
3789         return err;
3790 }
3791
3792 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
3793                                     struct qca_version *ver,
3794                                     const struct qca_device_info *info)
3795 {
3796         const struct firmware *fw;
3797         char fwname[64];
3798         int err;
3799
3800         snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin",
3801                  le32_to_cpu(ver->rom_version));
3802
3803         err = request_firmware(&fw, fwname, &hdev->dev);
3804         if (err) {
3805                 bt_dev_err(hdev, "failed to request NVM file: %s (%d)",
3806                            fwname, err);
3807                 return err;
3808         }
3809
3810         bt_dev_info(hdev, "using NVM file: %s", fwname);
3811
3812         err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
3813
3814         release_firmware(fw);
3815
3816         return err;
3817 }
3818
3819 /* identify the ROM version and check whether patches are needed */
3820 static bool btusb_qca_need_patch(struct usb_device *udev)
3821 {
3822         struct qca_version ver;
3823
3824         if (btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3825                                       sizeof(ver)) < 0)
3826                 return false;
3827         /* only low ROM versions need patches */
3828         return !(le32_to_cpu(ver.rom_version) & ~0xffffU);
3829 }
3830
3831 static int btusb_setup_qca(struct hci_dev *hdev)
3832 {
3833         struct btusb_data *btdata = hci_get_drvdata(hdev);
3834         struct usb_device *udev = btdata->udev;
3835         const struct qca_device_info *info = NULL;
3836         struct qca_version ver;
3837         u32 ver_rom;
3838         u8 status;
3839         int i, err;
3840
3841         err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3842                                         sizeof(ver));
3843         if (err < 0)
3844                 return err;
3845
3846         ver_rom = le32_to_cpu(ver.rom_version);
3847
3848         for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
3849                 if (ver_rom == qca_devices_table[i].rom_version)
3850                         info = &qca_devices_table[i];
3851         }
3852         if (!info) {
3853                 bt_dev_err(hdev, "don't support firmware rome 0x%x", ver_rom);
3854                 return -ENODEV;
3855         }
3856
3857         err = btusb_qca_send_vendor_req(udev, QCA_CHECK_STATUS, &status,
3858                                         sizeof(status));
3859         if (err < 0)
3860                 return err;
3861
3862         if (!(status & QCA_PATCH_UPDATED)) {
3863                 err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
3864                 if (err < 0)
3865                         return err;
3866         }
3867
3868         if (!(status & QCA_SYSCFG_UPDATED)) {
3869                 err = btusb_setup_qca_load_nvm(hdev, &ver, info);
3870                 if (err < 0)
3871                         return err;
3872         }
3873
3874         return 0;
3875 }
3876
3877 static inline int __set_diag_interface(struct hci_dev *hdev)
3878 {
3879         struct btusb_data *data = hci_get_drvdata(hdev);
3880         struct usb_interface *intf = data->diag;
3881         int i;
3882
3883         if (!data->diag)
3884                 return -ENODEV;
3885
3886         data->diag_tx_ep = NULL;
3887         data->diag_rx_ep = NULL;
3888
3889         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3890                 struct usb_endpoint_descriptor *ep_desc;
3891
3892                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3893
3894                 if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3895                         data->diag_tx_ep = ep_desc;
3896                         continue;
3897                 }
3898
3899                 if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3900                         data->diag_rx_ep = ep_desc;
3901                         continue;
3902                 }
3903         }
3904
3905         if (!data->diag_tx_ep || !data->diag_rx_ep) {
3906                 bt_dev_err(hdev, "invalid diagnostic descriptors");
3907                 return -ENODEV;
3908         }
3909
3910         return 0;
3911 }
3912
3913 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
3914 {
3915         struct btusb_data *data = hci_get_drvdata(hdev);
3916         struct sk_buff *skb;
3917         struct urb *urb;
3918         unsigned int pipe;
3919
3920         if (!data->diag_tx_ep)
3921                 return ERR_PTR(-ENODEV);
3922
3923         urb = usb_alloc_urb(0, GFP_KERNEL);
3924         if (!urb)
3925                 return ERR_PTR(-ENOMEM);
3926
3927         skb = bt_skb_alloc(2, GFP_KERNEL);
3928         if (!skb) {
3929                 usb_free_urb(urb);
3930                 return ERR_PTR(-ENOMEM);
3931         }
3932
3933         skb_put_u8(skb, 0xf0);
3934         skb_put_u8(skb, enable);
3935
3936         pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
3937
3938         usb_fill_bulk_urb(urb, data->udev, pipe,
3939                           skb->data, skb->len, btusb_tx_complete, skb);
3940
3941         skb->dev = (void *)hdev;
3942
3943         return urb;
3944 }
3945
3946 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
3947 {
3948         struct btusb_data *data = hci_get_drvdata(hdev);
3949         struct urb *urb;
3950
3951         if (!data->diag)
3952                 return -ENODEV;
3953
3954         if (!test_bit(HCI_RUNNING, &hdev->flags))
3955                 return -ENETDOWN;
3956
3957         urb = alloc_diag_urb(hdev, enable);
3958         if (IS_ERR(urb))
3959                 return PTR_ERR(urb);
3960
3961         return submit_or_queue_tx_urb(hdev, urb);
3962 }
3963
3964 #ifdef CONFIG_PM
3965 static irqreturn_t btusb_oob_wake_handler(int irq, void *priv)
3966 {
3967         struct btusb_data *data = priv;
3968
3969         pm_wakeup_event(&data->udev->dev, 0);
3970         pm_system_wakeup();
3971
3972         /* Disable only if not already disabled (keep it balanced) */
3973         if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
3974                 disable_irq_nosync(irq);
3975                 disable_irq_wake(irq);
3976         }
3977         return IRQ_HANDLED;
3978 }
3979
3980 static const struct of_device_id btusb_match_table[] = {
3981         { .compatible = "usb1286,204e" },
3982         { .compatible = "usbcf3,e300" }, /* QCA6174A */
3983         { .compatible = "usb4ca,301a" }, /* QCA6174A (Lite-On) */
3984         { }
3985 };
3986 MODULE_DEVICE_TABLE(of, btusb_match_table);
3987
3988 /* Use an oob wakeup pin? */
3989 static int btusb_config_oob_wake(struct hci_dev *hdev)
3990 {
3991         struct btusb_data *data = hci_get_drvdata(hdev);
3992         struct device *dev = &data->udev->dev;
3993         int irq, ret;
3994
3995         clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
3996
3997         if (!of_match_device(btusb_match_table, dev))
3998                 return 0;
3999
4000         /* Move on if no IRQ specified */
4001         irq = of_irq_get_byname(dev->of_node, "wakeup");
4002         if (irq <= 0) {
4003                 bt_dev_dbg(hdev, "%s: no OOB Wakeup IRQ in DT", __func__);
4004                 return 0;
4005         }
4006
4007         irq_set_status_flags(irq, IRQ_NOAUTOEN);
4008         ret = devm_request_irq(&hdev->dev, irq, btusb_oob_wake_handler,
4009                                0, "OOB Wake-on-BT", data);
4010         if (ret) {
4011                 bt_dev_err(hdev, "%s: IRQ request failed", __func__);
4012                 return ret;
4013         }
4014
4015         ret = device_init_wakeup(dev, true);
4016         if (ret) {
4017                 bt_dev_err(hdev, "%s: failed to init_wakeup", __func__);
4018                 return ret;
4019         }
4020
4021         data->oob_wake_irq = irq;
4022         bt_dev_info(hdev, "OOB Wake-on-BT configured at IRQ %u", irq);
4023         return 0;
4024 }
4025 #endif
4026
4027 static void btusb_check_needs_reset_resume(struct usb_interface *intf)
4028 {
4029         if (dmi_check_system(btusb_needs_reset_resume_table))
4030                 interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
4031 }
4032
4033 static bool btusb_prevent_wake(struct hci_dev *hdev)
4034 {
4035         struct btusb_data *data = hci_get_drvdata(hdev);
4036
4037         if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
4038                 return true;
4039
4040         return !device_may_wakeup(&data->udev->dev);
4041 }
4042
4043 static int btusb_probe(struct usb_interface *intf,
4044                        const struct usb_device_id *id)
4045 {
4046         struct usb_endpoint_descriptor *ep_desc;
4047         struct gpio_desc *reset_gpio;
4048         struct btusb_data *data;
4049         struct hci_dev *hdev;
4050         unsigned ifnum_base;
4051         int i, err;
4052
4053         BT_DBG("intf %p id %p", intf, id);
4054
4055         /* interface numbers are hardcoded in the spec */
4056         if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
4057                 if (!(id->driver_info & BTUSB_IFNUM_2))
4058                         return -ENODEV;
4059                 if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
4060                         return -ENODEV;
4061         }
4062
4063         ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
4064
4065         if (!id->driver_info) {
4066                 const struct usb_device_id *match;
4067
4068                 match = usb_match_id(intf, blacklist_table);
4069                 if (match)
4070                         id = match;
4071         }
4072
4073         if (id->driver_info == BTUSB_IGNORE)
4074                 return -ENODEV;
4075
4076         if (id->driver_info & BTUSB_ATH3012) {
4077                 struct usb_device *udev = interface_to_usbdev(intf);
4078
4079                 /* Old firmware would otherwise let ath3k driver load
4080                  * patch and sysconfig files
4081                  */
4082                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001 &&
4083                     !btusb_qca_need_patch(udev))
4084                         return -ENODEV;
4085         }
4086
4087         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
4088         if (!data)
4089                 return -ENOMEM;
4090
4091         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
4092                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
4093
4094                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
4095                         data->intr_ep = ep_desc;
4096                         continue;
4097                 }
4098
4099                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
4100                         data->bulk_tx_ep = ep_desc;
4101                         continue;
4102                 }
4103
4104                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
4105                         data->bulk_rx_ep = ep_desc;
4106                         continue;
4107                 }
4108         }
4109
4110         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
4111                 return -ENODEV;
4112
4113         if (id->driver_info & BTUSB_AMP) {
4114                 data->cmdreq_type = USB_TYPE_CLASS | 0x01;
4115                 data->cmdreq = 0x2b;
4116         } else {
4117                 data->cmdreq_type = USB_TYPE_CLASS;
4118                 data->cmdreq = 0x00;
4119         }
4120
4121         data->udev = interface_to_usbdev(intf);
4122         data->intf = intf;
4123
4124         INIT_WORK(&data->work, btusb_work);
4125         INIT_WORK(&data->waker, btusb_waker);
4126         init_usb_anchor(&data->deferred);
4127         init_usb_anchor(&data->tx_anchor);
4128         spin_lock_init(&data->txlock);
4129
4130         init_usb_anchor(&data->intr_anchor);
4131         init_usb_anchor(&data->bulk_anchor);
4132         init_usb_anchor(&data->isoc_anchor);
4133         init_usb_anchor(&data->diag_anchor);
4134         init_usb_anchor(&data->ctrl_anchor);
4135         spin_lock_init(&data->rxlock);
4136
4137         if (id->driver_info & BTUSB_INTEL_NEW) {
4138                 data->recv_event = btusb_recv_event_intel;
4139                 data->recv_bulk = btusb_recv_bulk_intel;
4140                 set_bit(BTUSB_BOOTLOADER, &data->flags);
4141         } else {
4142                 data->recv_event = hci_recv_frame;
4143                 data->recv_bulk = btusb_recv_bulk;
4144         }
4145
4146         hdev = hci_alloc_dev();
4147         if (!hdev)
4148                 return -ENOMEM;
4149
4150         hdev->bus = HCI_USB;
4151         hci_set_drvdata(hdev, data);
4152
4153         if (id->driver_info & BTUSB_AMP)
4154                 hdev->dev_type = HCI_AMP;
4155         else
4156                 hdev->dev_type = HCI_PRIMARY;
4157
4158         data->hdev = hdev;
4159
4160         SET_HCIDEV_DEV(hdev, &intf->dev);
4161
4162         reset_gpio = gpiod_get_optional(&data->udev->dev, "reset",
4163                                         GPIOD_OUT_LOW);
4164         if (IS_ERR(reset_gpio)) {
4165                 err = PTR_ERR(reset_gpio);
4166                 goto out_free_dev;
4167         } else if (reset_gpio) {
4168                 data->reset_gpio = reset_gpio;
4169         }
4170
4171         hdev->open   = btusb_open;
4172         hdev->close  = btusb_close;
4173         hdev->flush  = btusb_flush;
4174         hdev->send   = btusb_send_frame;
4175         hdev->notify = btusb_notify;
4176         hdev->prevent_wake = btusb_prevent_wake;
4177
4178 #ifdef CONFIG_PM
4179         err = btusb_config_oob_wake(hdev);
4180         if (err)
4181                 goto out_free_dev;
4182
4183         /* Marvell devices may need a specific chip configuration */
4184         if (id->driver_info & BTUSB_MARVELL && data->oob_wake_irq) {
4185                 err = marvell_config_oob_wake(hdev);
4186                 if (err)
4187                         goto out_free_dev;
4188         }
4189 #endif
4190         if (id->driver_info & BTUSB_CW6622)
4191                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
4192
4193         if (id->driver_info & BTUSB_BCM2045)
4194                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
4195
4196         if (id->driver_info & BTUSB_BCM92035)
4197                 hdev->setup = btusb_setup_bcm92035;
4198
4199         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
4200             (id->driver_info & BTUSB_BCM_PATCHRAM)) {
4201                 hdev->manufacturer = 15;
4202                 hdev->setup = btbcm_setup_patchram;
4203                 hdev->set_diag = btusb_bcm_set_diag;
4204                 hdev->set_bdaddr = btbcm_set_bdaddr;
4205
4206                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
4207                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
4208         }
4209
4210         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
4211             (id->driver_info & BTUSB_BCM_APPLE)) {
4212                 hdev->manufacturer = 15;
4213                 hdev->setup = btbcm_setup_apple;
4214                 hdev->set_diag = btusb_bcm_set_diag;
4215
4216                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
4217                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
4218         }
4219
4220         if (id->driver_info & BTUSB_INTEL) {
4221                 hdev->manufacturer = 2;
4222                 hdev->setup = btusb_setup_intel;
4223                 hdev->shutdown = btusb_shutdown_intel;
4224                 hdev->set_diag = btintel_set_diag_mfg;
4225                 hdev->set_bdaddr = btintel_set_bdaddr;
4226                 hdev->cmd_timeout = btusb_intel_cmd_timeout;
4227                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
4228                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4229                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
4230         }
4231
4232         if (id->driver_info & BTUSB_INTEL_NEW) {
4233                 hdev->manufacturer = 2;
4234                 hdev->send = btusb_send_frame_intel;
4235                 hdev->setup = btusb_setup_intel_new;
4236                 hdev->shutdown = btusb_shutdown_intel_new;
4237                 hdev->hw_error = btintel_hw_error;
4238                 hdev->set_diag = btintel_set_diag;
4239                 hdev->set_bdaddr = btintel_set_bdaddr;
4240                 hdev->cmd_timeout = btusb_intel_cmd_timeout;
4241                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
4242                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4243                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
4244         }
4245
4246         if (id->driver_info & BTUSB_INTEL_NEWGEN) {
4247                 hdev->manufacturer = 2;
4248                 hdev->send = btusb_send_frame_intel;
4249                 hdev->setup = btusb_setup_intel_newgen;
4250                 hdev->shutdown = btusb_shutdown_intel_new;
4251                 hdev->hw_error = btintel_hw_error;
4252                 hdev->set_diag = btintel_set_diag;
4253                 hdev->set_bdaddr = btintel_set_bdaddr;
4254                 hdev->cmd_timeout = btusb_intel_cmd_timeout;
4255                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
4256                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4257                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
4258
4259                 data->recv_event = btusb_recv_event_intel;
4260                 data->recv_bulk = btusb_recv_bulk_intel;
4261                 set_bit(BTUSB_BOOTLOADER, &data->flags);
4262         }
4263
4264         if (id->driver_info & BTUSB_MARVELL)
4265                 hdev->set_bdaddr = btusb_set_bdaddr_marvell;
4266
4267         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK) &&
4268             (id->driver_info & BTUSB_MEDIATEK)) {
4269                 hdev->setup = btusb_mtk_setup;
4270                 hdev->shutdown = btusb_mtk_shutdown;
4271                 hdev->manufacturer = 70;
4272                 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
4273         }
4274
4275         if (id->driver_info & BTUSB_SWAVE) {
4276                 set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
4277                 set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
4278         }
4279
4280         if (id->driver_info & BTUSB_INTEL_BOOT) {
4281                 hdev->manufacturer = 2;
4282                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
4283         }
4284
4285         if (id->driver_info & BTUSB_ATH3012) {
4286                 data->setup_on_usb = btusb_setup_qca;
4287                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
4288                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4289                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
4290         }
4291
4292         if (id->driver_info & BTUSB_QCA_ROME) {
4293                 data->setup_on_usb = btusb_setup_qca;
4294                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
4295                 hdev->cmd_timeout = btusb_qca_cmd_timeout;
4296                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4297                 btusb_check_needs_reset_resume(intf);
4298         }
4299
4300         if (id->driver_info & BTUSB_QCA_WCN6855) {
4301                 data->setup_on_usb = btusb_setup_qca;
4302                 hdev->set_bdaddr = btusb_set_bdaddr_wcn6855;
4303                 hdev->cmd_timeout = btusb_qca_cmd_timeout;
4304                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4305         }
4306
4307         if (id->driver_info & BTUSB_AMP) {
4308                 /* AMP controllers do not support SCO packets */
4309                 data->isoc = NULL;
4310         } else {
4311                 /* Interface orders are hardcoded in the specification */
4312                 data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
4313                 data->isoc_ifnum = ifnum_base + 1;
4314         }
4315
4316         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
4317             (id->driver_info & BTUSB_REALTEK)) {
4318                 hdev->setup = btrtl_setup_realtek;
4319                 hdev->shutdown = btrtl_shutdown_realtek;
4320                 hdev->cmd_timeout = btusb_rtl_cmd_timeout;
4321
4322                 /* Realtek devices lose their updated firmware over global
4323                  * suspend that means host doesn't send SET_FEATURE
4324                  * (DEVICE_REMOTE_WAKEUP)
4325                  */
4326                 set_bit(BTUSB_WAKEUP_DISABLE, &data->flags);
4327                 if (btusb_find_altsetting(data, 1))
4328                         set_bit(BTUSB_USE_ALT1_FOR_WBS, &data->flags);
4329                 else
4330                         bt_dev_err(hdev, "Device does not support ALT setting 1");
4331         }
4332
4333         if (!reset)
4334                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
4335
4336         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
4337                 if (!disable_scofix)
4338                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
4339         }
4340
4341         if (id->driver_info & BTUSB_BROKEN_ISOC)
4342                 data->isoc = NULL;
4343
4344         if (id->driver_info & BTUSB_WIDEBAND_SPEECH)
4345                 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
4346
4347         if (id->driver_info & BTUSB_VALID_LE_STATES)
4348                 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
4349
4350         if (id->driver_info & BTUSB_DIGIANSWER) {
4351                 data->cmdreq_type = USB_TYPE_VENDOR;
4352                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
4353         }
4354
4355         if (id->driver_info & BTUSB_CSR) {
4356                 struct usb_device *udev = data->udev;
4357                 u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
4358
4359                 /* Old firmware would otherwise execute USB reset */
4360                 if (bcdDevice < 0x117)
4361                         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
4362
4363                 /* This must be set first in case we disable it for fakes */
4364                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
4365
4366                 /* Fake CSR devices with broken commands */
4367                 if (le16_to_cpu(udev->descriptor.idVendor)  == 0x0a12 &&
4368                     le16_to_cpu(udev->descriptor.idProduct) == 0x0001)
4369                         hdev->setup = btusb_setup_csr;
4370         }
4371
4372         if (id->driver_info & BTUSB_SNIFFER) {
4373                 struct usb_device *udev = data->udev;
4374
4375                 /* New sniffer firmware has crippled HCI interface */
4376                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
4377                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
4378         }
4379
4380         if (id->driver_info & BTUSB_INTEL_BOOT) {
4381                 /* A bug in the bootloader causes that interrupt interface is
4382                  * only enabled after receiving SetInterface(0, AltSetting=0).
4383                  */
4384                 err = usb_set_interface(data->udev, 0, 0);
4385                 if (err < 0) {
4386                         BT_ERR("failed to set interface 0, alt 0 %d", err);
4387                         goto out_free_dev;
4388                 }
4389         }
4390
4391         if (data->isoc) {
4392                 err = usb_driver_claim_interface(&btusb_driver,
4393                                                  data->isoc, data);
4394                 if (err < 0)
4395                         goto out_free_dev;
4396         }
4397
4398         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) && data->diag) {
4399                 if (!usb_driver_claim_interface(&btusb_driver,
4400                                                 data->diag, data))
4401                         __set_diag_interface(hdev);
4402                 else
4403                         data->diag = NULL;
4404         }
4405
4406         if (enable_autosuspend)
4407                 usb_enable_autosuspend(data->udev);
4408
4409         err = hci_register_dev(hdev);
4410         if (err < 0)
4411                 goto out_free_dev;
4412
4413         usb_set_intfdata(intf, data);
4414
4415         return 0;
4416
4417 out_free_dev:
4418         if (data->reset_gpio)
4419                 gpiod_put(data->reset_gpio);
4420         hci_free_dev(hdev);
4421         return err;
4422 }
4423
4424 static void btusb_disconnect(struct usb_interface *intf)
4425 {
4426         struct btusb_data *data = usb_get_intfdata(intf);
4427         struct hci_dev *hdev;
4428
4429         BT_DBG("intf %p", intf);
4430
4431         if (!data)
4432                 return;
4433
4434         hdev = data->hdev;
4435         usb_set_intfdata(data->intf, NULL);
4436
4437         if (data->isoc)
4438                 usb_set_intfdata(data->isoc, NULL);
4439
4440         if (data->diag)
4441                 usb_set_intfdata(data->diag, NULL);
4442
4443         hci_unregister_dev(hdev);
4444
4445         if (intf == data->intf) {
4446                 if (data->isoc)
4447                         usb_driver_release_interface(&btusb_driver, data->isoc);
4448                 if (data->diag)
4449                         usb_driver_release_interface(&btusb_driver, data->diag);
4450         } else if (intf == data->isoc) {
4451                 if (data->diag)
4452                         usb_driver_release_interface(&btusb_driver, data->diag);
4453                 usb_driver_release_interface(&btusb_driver, data->intf);
4454         } else if (intf == data->diag) {
4455                 usb_driver_release_interface(&btusb_driver, data->intf);
4456                 if (data->isoc)
4457                         usb_driver_release_interface(&btusb_driver, data->isoc);
4458         }
4459
4460         if (data->oob_wake_irq)
4461                 device_init_wakeup(&data->udev->dev, false);
4462
4463         if (data->reset_gpio)
4464                 gpiod_put(data->reset_gpio);
4465
4466         hci_free_dev(hdev);
4467 }
4468
4469 #ifdef CONFIG_PM
4470 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
4471 {
4472         struct btusb_data *data = usb_get_intfdata(intf);
4473
4474         BT_DBG("intf %p", intf);
4475
4476         if (data->suspend_count++)
4477                 return 0;
4478
4479         spin_lock_irq(&data->txlock);
4480         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
4481                 set_bit(BTUSB_SUSPENDING, &data->flags);
4482                 spin_unlock_irq(&data->txlock);
4483         } else {
4484                 spin_unlock_irq(&data->txlock);
4485                 data->suspend_count--;
4486                 return -EBUSY;
4487         }
4488
4489         cancel_work_sync(&data->work);
4490
4491         btusb_stop_traffic(data);
4492         usb_kill_anchored_urbs(&data->tx_anchor);
4493
4494         if (data->oob_wake_irq && device_may_wakeup(&data->udev->dev)) {
4495                 set_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
4496                 enable_irq_wake(data->oob_wake_irq);
4497                 enable_irq(data->oob_wake_irq);
4498         }
4499
4500         /* For global suspend, Realtek devices lose the loaded fw
4501          * in them. But for autosuspend, firmware should remain.
4502          * Actually, it depends on whether the usb host sends
4503          * set feature (enable wakeup) or not.
4504          */
4505         if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags)) {
4506                 if (PMSG_IS_AUTO(message) &&
4507                     device_can_wakeup(&data->udev->dev))
4508                         data->udev->do_remote_wakeup = 1;
4509                 else if (!PMSG_IS_AUTO(message))
4510                         data->udev->reset_resume = 1;
4511         }
4512
4513         return 0;
4514 }
4515
4516 static void play_deferred(struct btusb_data *data)
4517 {
4518         struct urb *urb;
4519         int err;
4520
4521         while ((urb = usb_get_from_anchor(&data->deferred))) {
4522                 usb_anchor_urb(urb, &data->tx_anchor);
4523
4524                 err = usb_submit_urb(urb, GFP_ATOMIC);
4525                 if (err < 0) {
4526                         if (err != -EPERM && err != -ENODEV)
4527                                 BT_ERR("%s urb %p submission failed (%d)",
4528                                        data->hdev->name, urb, -err);
4529                         kfree(urb->setup_packet);
4530                         usb_unanchor_urb(urb);
4531                         usb_free_urb(urb);
4532                         break;
4533                 }
4534
4535                 data->tx_in_flight++;
4536                 usb_free_urb(urb);
4537         }
4538
4539         /* Cleanup the rest deferred urbs. */
4540         while ((urb = usb_get_from_anchor(&data->deferred))) {
4541                 kfree(urb->setup_packet);
4542                 usb_free_urb(urb);
4543         }
4544 }
4545
4546 static int btusb_resume(struct usb_interface *intf)
4547 {
4548         struct btusb_data *data = usb_get_intfdata(intf);
4549         struct hci_dev *hdev = data->hdev;
4550         int err = 0;
4551
4552         BT_DBG("intf %p", intf);
4553
4554         if (--data->suspend_count)
4555                 return 0;
4556
4557         /* Disable only if not already disabled (keep it balanced) */
4558         if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
4559                 disable_irq(data->oob_wake_irq);
4560                 disable_irq_wake(data->oob_wake_irq);
4561         }
4562
4563         if (!test_bit(HCI_RUNNING, &hdev->flags))
4564                 goto done;
4565
4566         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
4567                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
4568                 if (err < 0) {
4569                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
4570                         goto failed;
4571                 }
4572         }
4573
4574         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
4575                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
4576                 if (err < 0) {
4577                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
4578                         goto failed;
4579                 }
4580
4581                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
4582         }
4583
4584         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
4585                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
4586                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
4587                 else
4588                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
4589         }
4590
4591         spin_lock_irq(&data->txlock);
4592         play_deferred(data);
4593         clear_bit(BTUSB_SUSPENDING, &data->flags);
4594         spin_unlock_irq(&data->txlock);
4595         schedule_work(&data->work);
4596
4597         return 0;
4598
4599 failed:
4600         usb_scuttle_anchored_urbs(&data->deferred);
4601 done:
4602         spin_lock_irq(&data->txlock);
4603         clear_bit(BTUSB_SUSPENDING, &data->flags);
4604         spin_unlock_irq(&data->txlock);
4605
4606         return err;
4607 }
4608 #endif
4609
4610 static struct usb_driver btusb_driver = {
4611         .name           = "btusb",
4612         .probe          = btusb_probe,
4613         .disconnect     = btusb_disconnect,
4614 #ifdef CONFIG_PM
4615         .suspend        = btusb_suspend,
4616         .resume         = btusb_resume,
4617 #endif
4618         .id_table       = btusb_table,
4619         .supports_autosuspend = 1,
4620         .disable_hub_initiated_lpm = 1,
4621 };
4622
4623 module_usb_driver(btusb_driver);
4624
4625 module_param(disable_scofix, bool, 0644);
4626 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
4627
4628 module_param(force_scofix, bool, 0644);
4629 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
4630
4631 module_param(enable_autosuspend, bool, 0644);
4632 MODULE_PARM_DESC(enable_autosuspend, "Enable USB autosuspend by default");
4633
4634 module_param(reset, bool, 0644);
4635 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
4636
4637 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
4638 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
4639 MODULE_VERSION(VERSION);
4640 MODULE_LICENSE("GPL");