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 <linux/debugfs.h>
  20 #include <asm/unaligned.h>
  21
  22 #include <net/bluetooth/bluetooth.h>
  23 #include <net/bluetooth/hci_core.h>
  24
  25 #include "btintel.h"
  26 #include "btbcm.h"
  27 #include "btrtl.h"
  28 #include "btmtk.h"
  29
  30 #define VERSION "0.8"
  31
  32 static bool disable_scofix;
  33 static bool force_scofix;
  34 static bool enable_autosuspend = IS_ENABLED(CONFIG_BT_HCIBTUSB_AUTOSUSPEND);
  35 static bool reset = true;
  36
  37 static struct usb_driver btusb_driver;
  38
  39 #define BTUSB_IGNORE                    BIT(0)
  40 #define BTUSB_DIGIANSWER                BIT(1)
  41 #define BTUSB_CSR                       BIT(2)
  42 #define BTUSB_SNIFFER                   BIT(3)
  43 #define BTUSB_BCM92035                  BIT(4)
  44 #define BTUSB_BROKEN_ISOC               BIT(5)
  45 #define BTUSB_WRONG_SCO_MTU             BIT(6)
  46 #define BTUSB_ATH3012                   BIT(7)
  47 #define BTUSB_INTEL_COMBINED            BIT(8)
  48 #define BTUSB_INTEL_BOOT                BIT(9)
  49 #define BTUSB_BCM_PATCHRAM              BIT(10)
  50 #define BTUSB_MARVELL                   BIT(11)
  51 #define BTUSB_SWAVE                     BIT(12)
  52 #define BTUSB_AMP                       BIT(13)
  53 #define BTUSB_QCA_ROME                  BIT(14)
  54 #define BTUSB_BCM_APPLE                 BIT(15)
  55 #define BTUSB_REALTEK                   BIT(16)
  56 #define BTUSB_BCM2045                   BIT(17)
  57 #define BTUSB_IFNUM_2                   BIT(18)
  58 #define BTUSB_CW6622                    BIT(19)
  59 #define BTUSB_MEDIATEK                  BIT(20)
  60 #define BTUSB_WIDEBAND_SPEECH           BIT(21)
  61 #define BTUSB_VALID_LE_STATES           BIT(22)
  62 #define BTUSB_QCA_WCN6855               BIT(23)
  63 #define BTUSB_INTEL_BROKEN_SHUTDOWN_LED BIT(24)
  64 #define BTUSB_INTEL_BROKEN_INITIAL_NCMD BIT(25)
  65 #define BTUSB_INTEL_NO_WBS_SUPPORT      BIT(26)
  66
  67 static const struct usb_device_id btusb_table[] = {
  68         /* Generic Bluetooth USB device */
  69         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
  70
  71         /* Generic Bluetooth AMP device */
  72         { USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
  73
  74         /* Generic Bluetooth USB interface */
  75         { USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },
  76
  77         /* Apple-specific (Broadcom) devices */
  78         { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
  79           .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },
  80
  81         /* MediaTek MT76x0E */
  82         { USB_DEVICE(0x0e8d, 0x763f) },
  83
  84         /* Broadcom SoftSailing reporting vendor specific */
  85         { USB_DEVICE(0x0a5c, 0x21e1) },
  86
  87         /* Apple MacBookPro 7,1 */
  88         { USB_DEVICE(0x05ac, 0x8213) },
  89
  90         /* Apple iMac11,1 */
  91         { USB_DEVICE(0x05ac, 0x8215) },
  92
  93         /* Apple MacBookPro6,2 */
  94         { USB_DEVICE(0x05ac, 0x8218) },
  95
  96         /* Apple MacBookAir3,1, MacBookAir3,2 */
  97         { USB_DEVICE(0x05ac, 0x821b) },
  98
  99         /* Apple MacBookAir4,1 */
 100         { USB_DEVICE(0x05ac, 0x821f) },
 101
 102         /* Apple MacBookPro8,2 */
 103         { USB_DEVICE(0x05ac, 0x821a) },
 104
 105         /* Apple MacMini5,1 */
 106         { USB_DEVICE(0x05ac, 0x8281) },
 107
 108         /* AVM BlueFRITZ! USB v2.0 */
 109         { USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },
 110
 111         /* Bluetooth Ultraport Module from IBM */
 112         { USB_DEVICE(0x04bf, 0x030a) },
 113
 114         /* ALPS Modules with non-standard id */
 115         { USB_DEVICE(0x044e, 0x3001) },
 116         { USB_DEVICE(0x044e, 0x3002) },
 117
 118         /* Ericsson with non-standard id */
 119         { USB_DEVICE(0x0bdb, 0x1002) },
 120
 121         /* Canyon CN-BTU1 with HID interfaces */
 122         { USB_DEVICE(0x0c10, 0x0000) },
 123
 124         /* Broadcom BCM20702B0 (Dynex/Insignia) */
 125         { USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
 126
 127         /* Broadcom BCM43142A0 (Foxconn/Lenovo) */
 128         { USB_VENDOR_AND_INTERFACE_INFO(0x105b, 0xff, 0x01, 0x01),
 129           .driver_info = BTUSB_BCM_PATCHRAM },
 130
 131         /* Broadcom BCM920703 (HTC Vive) */
 132         { USB_VENDOR_AND_INTERFACE_INFO(0x0bb4, 0xff, 0x01, 0x01),
 133           .driver_info = BTUSB_BCM_PATCHRAM },
 134
 135         /* Foxconn - Hon Hai */
 136         { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
 137           .driver_info = BTUSB_BCM_PATCHRAM },
 138
 139         /* Lite-On Technology - Broadcom based */
 140         { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
 141           .driver_info = BTUSB_BCM_PATCHRAM },
 142
 143         /* Broadcom devices with vendor specific id */
 144         { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
 145           .driver_info = BTUSB_BCM_PATCHRAM },
 146
 147         /* ASUSTek Computer - Broadcom based */
 148         { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
 149           .driver_info = BTUSB_BCM_PATCHRAM },
 150
 151         /* Belkin F8065bf - Broadcom based */
 152         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
 153           .driver_info = BTUSB_BCM_PATCHRAM },
 154
 155         /* IMC Networks - Broadcom based */
 156         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
 157           .driver_info = BTUSB_BCM_PATCHRAM },
 158
 159         /* Dell Computer - Broadcom based  */
 160         { USB_VENDOR_AND_INTERFACE_INFO(0x413c, 0xff, 0x01, 0x01),
 161           .driver_info = BTUSB_BCM_PATCHRAM },
 162
 163         /* Toshiba Corp - Broadcom based */
 164         { USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
 165           .driver_info = BTUSB_BCM_PATCHRAM },
 166
 167         /* Intel Bluetooth USB Bootloader (RAM module) */
 168         { USB_DEVICE(0x8087, 0x0a5a),
 169           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
 170
 171         { }     /* Terminating entry */
 172 };
 173
 174 MODULE_DEVICE_TABLE(usb, btusb_table);
 175
 176 static const struct usb_device_id blacklist_table[] = {
 177         /* CSR BlueCore devices */
 178         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
 179
 180         /* Broadcom BCM2033 without firmware */
 181         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
 182
 183         /* Broadcom BCM2045 devices */
 184         { USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },
 185
 186         /* Atheros 3011 with sflash firmware */
 187         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
 188         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
 189         { USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
 190         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
 191         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
 192         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
 193         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
 194
 195         /* Atheros AR9285 Malbec with sflash firmware */
 196         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
 197
 198         /* Atheros 3012 with sflash firmware */
 199         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
 200         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
 201         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
 202         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
 203         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
 204         { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
 205         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
 206         { USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
 207         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 208         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 209         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
 210         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
 211         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
 212         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
 213         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
 214         { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
 215         { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
 216         { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
 217         { USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
 218         { USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
 219         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 220         { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
 221         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
 222         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
 223         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
 224         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
 225         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 226         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 227         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
 228         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
 229         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
 230         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
 231         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
 232         { USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
 233         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
 234         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
 235         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
 236         { USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
 237         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 238         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 239         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 240         { USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
 241         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 242         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 243         { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
 244         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
 245         { USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
 246         { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
 247         { USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
 248         { USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
 249
 250         /* Atheros AR5BBU12 with sflash firmware */
 251         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
 252
 253         /* Atheros AR5BBU12 with sflash firmware */
 254         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
 255         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
 256
 257         /* QCA ROME chipset */
 258         { USB_DEVICE(0x0cf3, 0x535b), .driver_info = BTUSB_QCA_ROME |
 259                                                      BTUSB_WIDEBAND_SPEECH },
 260         { USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME |
 261                                                      BTUSB_WIDEBAND_SPEECH },
 262         { USB_DEVICE(0x0cf3, 0xe009), .driver_info = BTUSB_QCA_ROME |
 263                                                      BTUSB_WIDEBAND_SPEECH },
 264         { USB_DEVICE(0x0cf3, 0xe010), .driver_info = BTUSB_QCA_ROME |
 265                                                      BTUSB_WIDEBAND_SPEECH },
 266         { USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME |
 267                                                      BTUSB_WIDEBAND_SPEECH },
 268         { USB_DEVICE(0x0cf3, 0xe301), .driver_info = BTUSB_QCA_ROME |
 269                                                      BTUSB_WIDEBAND_SPEECH },
 270         { USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME |
 271                                                      BTUSB_WIDEBAND_SPEECH },
 272         { USB_DEVICE(0x0cf3, 0xe500), .driver_info = BTUSB_QCA_ROME |
 273                                                      BTUSB_WIDEBAND_SPEECH },
 274         { USB_DEVICE(0x0489, 0xe092), .driver_info = BTUSB_QCA_ROME |
 275                                                      BTUSB_WIDEBAND_SPEECH },
 276         { USB_DEVICE(0x0489, 0xe09f), .driver_info = BTUSB_QCA_ROME |
 277                                                      BTUSB_WIDEBAND_SPEECH },
 278         { USB_DEVICE(0x0489, 0xe0a2), .driver_info = BTUSB_QCA_ROME |
 279                                                      BTUSB_WIDEBAND_SPEECH },
 280         { USB_DEVICE(0x04ca, 0x3011), .driver_info = BTUSB_QCA_ROME |
 281                                                      BTUSB_WIDEBAND_SPEECH },
 282         { USB_DEVICE(0x04ca, 0x3015), .driver_info = BTUSB_QCA_ROME |
 283                                                      BTUSB_WIDEBAND_SPEECH },
 284         { USB_DEVICE(0x04ca, 0x3016), .driver_info = BTUSB_QCA_ROME |
 285                                                      BTUSB_WIDEBAND_SPEECH },
 286         { USB_DEVICE(0x04ca, 0x301a), .driver_info = BTUSB_QCA_ROME |
 287                                                      BTUSB_WIDEBAND_SPEECH },
 288         { USB_DEVICE(0x04ca, 0x3021), .driver_info = BTUSB_QCA_ROME |
 289                                                      BTUSB_WIDEBAND_SPEECH },
 290         { USB_DEVICE(0x13d3, 0x3491), .driver_info = BTUSB_QCA_ROME |
 291                                                      BTUSB_WIDEBAND_SPEECH },
 292         { USB_DEVICE(0x13d3, 0x3496), .driver_info = BTUSB_QCA_ROME |
 293                                                      BTUSB_WIDEBAND_SPEECH },
 294         { USB_DEVICE(0x13d3, 0x3501), .driver_info = BTUSB_QCA_ROME |
 295                                                      BTUSB_WIDEBAND_SPEECH },
 296
 297         /* QCA WCN6855 chipset */
 298         { USB_DEVICE(0x0cf3, 0xe600), .driver_info = BTUSB_QCA_WCN6855 |
 299                                                      BTUSB_WIDEBAND_SPEECH |
 300                                                      BTUSB_VALID_LE_STATES },
 301         { USB_DEVICE(0x0489, 0xe0cc), .driver_info = BTUSB_QCA_WCN6855 |
 302                                                      BTUSB_WIDEBAND_SPEECH |
 303                                                      BTUSB_VALID_LE_STATES },
 304         { USB_DEVICE(0x0489, 0xe0d6), .driver_info = BTUSB_QCA_WCN6855 |
 305                                                      BTUSB_WIDEBAND_SPEECH |
 306                                                      BTUSB_VALID_LE_STATES },
 307         { USB_DEVICE(0x0489, 0xe0e3), .driver_info = BTUSB_QCA_WCN6855 |
 308                                                      BTUSB_WIDEBAND_SPEECH |
 309                                                      BTUSB_VALID_LE_STATES },
 310         { USB_DEVICE(0x10ab, 0x9309), .driver_info = BTUSB_QCA_WCN6855 |
 311                                                      BTUSB_WIDEBAND_SPEECH |
 312                                                      BTUSB_VALID_LE_STATES },
 313         { USB_DEVICE(0x10ab, 0x9409), .driver_info = BTUSB_QCA_WCN6855 |
 314                                                      BTUSB_WIDEBAND_SPEECH |
 315                                                      BTUSB_VALID_LE_STATES },
 316         { USB_DEVICE(0x0489, 0xe0d0), .driver_info = BTUSB_QCA_WCN6855 |
 317                                                      BTUSB_WIDEBAND_SPEECH |
 318                                                      BTUSB_VALID_LE_STATES },
 319
 320         /* QCA WCN785x chipset */
 321         { USB_DEVICE(0x0cf3, 0xe700), .driver_info = BTUSB_QCA_WCN6855 |
 322                                                      BTUSB_WIDEBAND_SPEECH |
 323                                                      BTUSB_VALID_LE_STATES },
 324
 325         /* Broadcom BCM2035 */
 326         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 327         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
 328         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
 329
 330         /* Broadcom BCM2045 */
 331         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
 332         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
 333
 334         /* IBM/Lenovo ThinkPad with Broadcom chip */
 335         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
 336         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
 337
 338         /* HP laptop with Broadcom chip */
 339         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
 340
 341         /* Dell laptop with Broadcom chip */
 342         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
 343
 344         /* Dell Wireless 370 and 410 devices */
 345         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
 346         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
 347
 348         /* Belkin F8T012 and F8T013 devices */
 349         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
 350         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
 351
 352         /* Asus WL-BTD202 device */
 353         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
 354
 355         /* Kensington Bluetooth USB adapter */
 356         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
 357
 358         /* RTX Telecom based adapters with buggy SCO support */
 359         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
 360         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
 361
 362         /* CONWISE Technology based adapters with buggy SCO support */
 363         { USB_DEVICE(0x0e5e, 0x6622),
 364           .driver_info = BTUSB_BROKEN_ISOC | BTUSB_CW6622},
 365
 366         /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
 367         { USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
 368
 369         /* Digianswer devices */
 370         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
 371         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
 372
 373         /* CSR BlueCore Bluetooth Sniffer */
 374         { USB_DEVICE(0x0a12, 0x0002),
 375           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
 376
 377         /* Frontline ComProbe Bluetooth Sniffer */
 378         { USB_DEVICE(0x16d3, 0x0002),
 379           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
 380
 381         /* Marvell Bluetooth devices */
 382         { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
 383         { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
 384         { USB_DEVICE(0x1286, 0x204e), .driver_info = BTUSB_MARVELL },
 385
 386         /* Intel Bluetooth devices */
 387         { USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_COMBINED },
 388         { USB_DEVICE(0x8087, 0x0026), .driver_info = BTUSB_INTEL_COMBINED },
 389         { USB_DEVICE(0x8087, 0x0029), .driver_info = BTUSB_INTEL_COMBINED },
 390         { USB_DEVICE(0x8087, 0x0032), .driver_info = BTUSB_INTEL_COMBINED },
 391         { USB_DEVICE(0x8087, 0x0033), .driver_info = BTUSB_INTEL_COMBINED },
 392         { USB_DEVICE(0x8087, 0x0035), .driver_info = BTUSB_INTEL_COMBINED },
 393         { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
 394         { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL_COMBINED |
 395                                                      BTUSB_INTEL_NO_WBS_SUPPORT |
 396                                                      BTUSB_INTEL_BROKEN_INITIAL_NCMD |
 397                                                      BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
 398         { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL_COMBINED |
 399                                                      BTUSB_INTEL_NO_WBS_SUPPORT |
 400                                                      BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
 401         { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_COMBINED },
 402         { USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL_COMBINED |
 403                                                      BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
 404         { USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_COMBINED },
 405
 406         /* Other Intel Bluetooth devices */
 407         { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
 408           .driver_info = BTUSB_IGNORE },
 409
 410         /* Realtek 8822CE Bluetooth devices */
 411         { USB_DEVICE(0x0bda, 0xb00c), .driver_info = BTUSB_REALTEK |
 412                                                      BTUSB_WIDEBAND_SPEECH },
 413         { USB_DEVICE(0x0bda, 0xc822), .driver_info = BTUSB_REALTEK |
 414                                                      BTUSB_WIDEBAND_SPEECH },
 415
 416         /* Realtek 8852AE Bluetooth devices */
 417         { USB_DEVICE(0x0bda, 0x2852), .driver_info = BTUSB_REALTEK |
 418                                                      BTUSB_WIDEBAND_SPEECH },
 419         { USB_DEVICE(0x0bda, 0xc852), .driver_info = BTUSB_REALTEK |
 420                                                      BTUSB_WIDEBAND_SPEECH },
 421         { USB_DEVICE(0x0bda, 0x385a), .driver_info = BTUSB_REALTEK |
 422                                                      BTUSB_WIDEBAND_SPEECH },
 423         { USB_DEVICE(0x0bda, 0x4852), .driver_info = BTUSB_REALTEK |
 424                                                      BTUSB_WIDEBAND_SPEECH },
 425         { USB_DEVICE(0x04c5, 0x165c), .driver_info = BTUSB_REALTEK |
 426                                                      BTUSB_WIDEBAND_SPEECH },
 427         { USB_DEVICE(0x04ca, 0x4006), .driver_info = BTUSB_REALTEK |
 428                                                      BTUSB_WIDEBAND_SPEECH },
 429
 430         /* Realtek Bluetooth devices */
 431         { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
 432           .driver_info = BTUSB_REALTEK },
 433
 434         /* MediaTek Bluetooth devices */
 435         { USB_VENDOR_AND_INTERFACE_INFO(0x0e8d, 0xe0, 0x01, 0x01),
 436           .driver_info = BTUSB_MEDIATEK |
 437                          BTUSB_WIDEBAND_SPEECH |
 438                          BTUSB_VALID_LE_STATES },
 439
 440         /* Additional MediaTek MT7615E Bluetooth devices */
 441         { USB_DEVICE(0x13d3, 0x3560), .driver_info = BTUSB_MEDIATEK},
 442
 443         /* Additional MediaTek MT7663 Bluetooth devices */
 444         { USB_DEVICE(0x043e, 0x310c), .driver_info = BTUSB_MEDIATEK |
 445                                                      BTUSB_WIDEBAND_SPEECH |
 446                                                      BTUSB_VALID_LE_STATES },
 447
 448         /* Additional MediaTek MT7668 Bluetooth devices */
 449         { USB_DEVICE(0x043e, 0x3109), .driver_info = BTUSB_MEDIATEK |
 450                                                      BTUSB_WIDEBAND_SPEECH |
 451                                                      BTUSB_VALID_LE_STATES },
 452
 453         /* Additional MediaTek MT7921 Bluetooth devices */
 454         { USB_DEVICE(0x0489, 0xe0c8), .driver_info = BTUSB_MEDIATEK |
 455                                                      BTUSB_WIDEBAND_SPEECH |
 456                                                      BTUSB_VALID_LE_STATES },
 457         { USB_DEVICE(0x04ca, 0x3802), .driver_info = BTUSB_MEDIATEK |
 458                                                      BTUSB_WIDEBAND_SPEECH |
 459                                                      BTUSB_VALID_LE_STATES },
 460         { USB_DEVICE(0x13d3, 0x3563), .driver_info = BTUSB_MEDIATEK |
 461                                                      BTUSB_WIDEBAND_SPEECH |
 462                                                      BTUSB_VALID_LE_STATES },
 463         { USB_DEVICE(0x13d3, 0x3564), .driver_info = BTUSB_MEDIATEK |
 464                                                      BTUSB_WIDEBAND_SPEECH |
 465                                                      BTUSB_VALID_LE_STATES },
 466         { USB_DEVICE(0x13d3, 0x3567), .driver_info = BTUSB_MEDIATEK |
 467                                                      BTUSB_WIDEBAND_SPEECH |
 468                                                      BTUSB_VALID_LE_STATES },
 469         { USB_DEVICE(0x0489, 0xe0cd), .driver_info = BTUSB_MEDIATEK |
 470                                                      BTUSB_WIDEBAND_SPEECH |
 471                                                      BTUSB_VALID_LE_STATES },
 472
 473         /* MediaTek MT7922A Bluetooth devices */
 474         { USB_DEVICE(0x0489, 0xe0d8), .driver_info = BTUSB_MEDIATEK |
 475                                                      BTUSB_WIDEBAND_SPEECH |
 476                                                      BTUSB_VALID_LE_STATES },
 477         { USB_DEVICE(0x0489, 0xe0d9), .driver_info = BTUSB_MEDIATEK |
 478                                                      BTUSB_WIDEBAND_SPEECH |
 479                                                      BTUSB_VALID_LE_STATES },
 480
 481         /* Additional Realtek 8723AE Bluetooth devices */
 482         { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
 483         { USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
 484
 485         /* Additional Realtek 8723BE Bluetooth devices */
 486         { USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
 487         { USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
 488         { USB_DEVICE(0x04f2, 0xb49f), .driver_info = BTUSB_REALTEK },
 489         { USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
 490         { USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
 491         { USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
 492         { USB_DEVICE(0x13d3, 0x3494), .driver_info = BTUSB_REALTEK },
 493
 494         /* Additional Realtek 8723BU Bluetooth devices */
 495         { USB_DEVICE(0x7392, 0xa611), .driver_info = BTUSB_REALTEK },
 496
 497         /* Additional Realtek 8723DE Bluetooth devices */
 498         { USB_DEVICE(0x0bda, 0xb009), .driver_info = BTUSB_REALTEK },
 499         { USB_DEVICE(0x2ff8, 0xb011), .driver_info = BTUSB_REALTEK },
 500
 501         /* Additional Realtek 8761B Bluetooth devices */
 502         { USB_DEVICE(0x2357, 0x0604), .driver_info = BTUSB_REALTEK |
 503                                                      BTUSB_WIDEBAND_SPEECH },
 504
 505         /* Additional Realtek 8761BU Bluetooth devices */
 506         { USB_DEVICE(0x0b05, 0x190e), .driver_info = BTUSB_REALTEK |
 507                                                      BTUSB_WIDEBAND_SPEECH },
 508         { USB_DEVICE(0x2550, 0x8761), .driver_info = BTUSB_REALTEK |
 509                                                      BTUSB_WIDEBAND_SPEECH },
 510
 511         /* Additional Realtek 8761BUV Bluetooth devices */
 512         { USB_DEVICE(0x0bda, 0x8771), .driver_info = BTUSB_REALTEK |
 513                                                      BTUSB_WIDEBAND_SPEECH },
 514
 515         /* Additional Realtek 8821AE Bluetooth devices */
 516         { USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
 517         { USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
 518         { USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
 519         { USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
 520         { USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
 521
 522         /* Additional Realtek 8822BE Bluetooth devices */
 523         { USB_DEVICE(0x13d3, 0x3526), .driver_info = BTUSB_REALTEK },
 524         { USB_DEVICE(0x0b05, 0x185c), .driver_info = BTUSB_REALTEK },
 525
 526         /* Additional Realtek 8822CE Bluetooth devices */
 527         { USB_DEVICE(0x04ca, 0x4005), .driver_info = BTUSB_REALTEK |
 528                                                      BTUSB_WIDEBAND_SPEECH },
 529         { USB_DEVICE(0x04c5, 0x161f), .driver_info = BTUSB_REALTEK |
 530                                                      BTUSB_WIDEBAND_SPEECH },
 531         { USB_DEVICE(0x0b05, 0x18ef), .driver_info = BTUSB_REALTEK |
 532                                                      BTUSB_WIDEBAND_SPEECH },
 533         { USB_DEVICE(0x13d3, 0x3548), .driver_info = BTUSB_REALTEK |
 534                                                      BTUSB_WIDEBAND_SPEECH },
 535         { USB_DEVICE(0x13d3, 0x3549), .driver_info = BTUSB_REALTEK |
 536                                                      BTUSB_WIDEBAND_SPEECH },
 537         { USB_DEVICE(0x13d3, 0x3553), .driver_info = BTUSB_REALTEK |
 538                                                      BTUSB_WIDEBAND_SPEECH },
 539         { USB_DEVICE(0x13d3, 0x3555), .driver_info = BTUSB_REALTEK |
 540                                                      BTUSB_WIDEBAND_SPEECH },
 541         { USB_DEVICE(0x2ff8, 0x3051), .driver_info = BTUSB_REALTEK |
 542                                                      BTUSB_WIDEBAND_SPEECH },
 543         { USB_DEVICE(0x1358, 0xc123), .driver_info = BTUSB_REALTEK |
 544                                                      BTUSB_WIDEBAND_SPEECH },
 545         { USB_DEVICE(0x0bda, 0xc123), .driver_info = BTUSB_REALTEK |
 546                                                      BTUSB_WIDEBAND_SPEECH },
 547         { USB_DEVICE(0x0cb5, 0xc547), .driver_info = BTUSB_REALTEK |
 548                                                      BTUSB_WIDEBAND_SPEECH },
 549
 550         /* Silicon Wave based devices */
 551         { USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
 552
 553         { }     /* Terminating entry */
 554 };
 555
 556 /* The Bluetooth USB module build into some devices needs to be reset on resume,
 557  * this is a problem with the platform (likely shutting off all power) not with
 558  * the module itself. So we use a DMI list to match known broken platforms.
 559  */
 560 static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
 561         {
 562                 /* Dell OptiPlex 3060 (QCA ROME device 0cf3:e007) */
 563                 .matches = {
 564                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 565                         DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 3060"),
 566                 },
 567         },
 568         {
 569                 /* Dell XPS 9360 (QCA ROME device 0cf3:e300) */
 570                 .matches = {
 571                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 572                         DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
 573                 },
 574         },
 575         {
 576                 /* Dell Inspiron 5565 (QCA ROME device 0cf3:e009) */
 577                 .matches = {
 578                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 579                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5565"),
 580                 },
 581         },
 582         {}
 583 };
 584
 585 #define BTUSB_MAX_ISOC_FRAMES   10
 586
 587 #define BTUSB_INTR_RUNNING      0
 588 #define BTUSB_BULK_RUNNING      1
 589 #define BTUSB_ISOC_RUNNING      2
 590 #define BTUSB_SUSPENDING        3
 591 #define BTUSB_DID_ISO_RESUME    4
 592 #define BTUSB_BOOTLOADER        5
 593 #define BTUSB_DOWNLOADING       6
 594 #define BTUSB_FIRMWARE_LOADED   7
 595 #define BTUSB_FIRMWARE_FAILED   8
 596 #define BTUSB_BOOTING           9
 597 #define BTUSB_DIAG_RUNNING      10
 598 #define BTUSB_OOB_WAKE_ENABLED  11
 599 #define BTUSB_HW_RESET_ACTIVE   12
 600 #define BTUSB_TX_WAIT_VND_EVT   13
 601 #define BTUSB_WAKEUP_AUTOSUSPEND        14
 602 #define BTUSB_USE_ALT3_FOR_WBS  15
 603
 604 struct btusb_data {
 605         struct hci_dev       *hdev;
 606         struct usb_device    *udev;
 607         struct usb_interface *intf;
 608         struct usb_interface *isoc;
 609         struct usb_interface *diag;
 610         unsigned isoc_ifnum;
 611
 612         unsigned long flags;
 613
 614         bool poll_sync;
 615         int intr_interval;
 616         struct work_struct  work;
 617         struct work_struct  waker;
 618         struct delayed_work rx_work;
 619
 620         struct sk_buff_head acl_q;
 621
 622         struct usb_anchor deferred;
 623         struct usb_anchor tx_anchor;
 624         int tx_in_flight;
 625         spinlock_t txlock;
 626
 627         struct usb_anchor intr_anchor;
 628         struct usb_anchor bulk_anchor;
 629         struct usb_anchor isoc_anchor;
 630         struct usb_anchor diag_anchor;
 631         struct usb_anchor ctrl_anchor;
 632         spinlock_t rxlock;
 633
 634         struct sk_buff *evt_skb;
 635         struct sk_buff *acl_skb;
 636         struct sk_buff *sco_skb;
 637
 638         struct usb_endpoint_descriptor *intr_ep;
 639         struct usb_endpoint_descriptor *bulk_tx_ep;
 640         struct usb_endpoint_descriptor *bulk_rx_ep;
 641         struct usb_endpoint_descriptor *isoc_tx_ep;
 642         struct usb_endpoint_descriptor *isoc_rx_ep;
 643         struct usb_endpoint_descriptor *diag_tx_ep;
 644         struct usb_endpoint_descriptor *diag_rx_ep;
 645
 646         struct gpio_desc *reset_gpio;
 647
 648         __u8 cmdreq_type;
 649         __u8 cmdreq;
 650
 651         unsigned int sco_num;
 652         unsigned int air_mode;
 653         bool usb_alt6_packet_flow;
 654         int isoc_altsetting;
 655         int suspend_count;
 656
 657         int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
 658         int (*recv_acl)(struct hci_dev *hdev, struct sk_buff *skb);
 659         int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
 660
 661         int (*setup_on_usb)(struct hci_dev *hdev);
 662
 663         int oob_wake_irq;   /* irq for out-of-band wake-on-bt */
 664         unsigned cmd_timeout_cnt;
 665 };
 666
 667 static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
 668 {
 669         struct btusb_data *data = hci_get_drvdata(hdev);
 670         struct gpio_desc *reset_gpio = data->reset_gpio;
 671
 672         if (++data->cmd_timeout_cnt < 5)
 673                 return;
 674
 675         if (!reset_gpio) {
 676                 bt_dev_err(hdev, "No way to reset. Ignoring and continuing");
 677                 return;
 678         }
 679
 680         /*
 681          * Toggle the hard reset line if the platform provides one. The reset
 682          * is going to yank the device off the USB and then replug. So doing
 683          * once is enough. The cleanup is handled correctly on the way out
 684          * (standard USB disconnect), and the new device is detected cleanly
 685          * and bound to the driver again like it should be.
 686          */
 687         if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
 688                 bt_dev_err(hdev, "last reset failed? Not resetting again");
 689                 return;
 690         }
 691
 692         bt_dev_err(hdev, "Initiating HW reset via gpio");
 693         gpiod_set_value_cansleep(reset_gpio, 1);
 694         msleep(100);
 695         gpiod_set_value_cansleep(reset_gpio, 0);
 696 }
 697
 698 static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
 699 {
 700         struct btusb_data *data = hci_get_drvdata(hdev);
 701         struct gpio_desc *reset_gpio = data->reset_gpio;
 702
 703         if (++data->cmd_timeout_cnt < 5)
 704                 return;
 705
 706         if (!reset_gpio) {
 707                 bt_dev_err(hdev, "No gpio to reset Realtek device, ignoring");
 708                 return;
 709         }
 710
 711         /* Toggle the hard reset line. The Realtek device is going to
 712          * yank itself off the USB and then replug. The cleanup is handled
 713          * correctly on the way out (standard USB disconnect), and the new
 714          * device is detected cleanly and bound to the driver again like
 715          * it should be.
 716          */
 717         if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
 718                 bt_dev_err(hdev, "last reset failed? Not resetting again");
 719                 return;
 720         }
 721
 722         bt_dev_err(hdev, "Reset Realtek device via gpio");
 723         gpiod_set_value_cansleep(reset_gpio, 1);
 724         msleep(200);
 725         gpiod_set_value_cansleep(reset_gpio, 0);
 726 }
 727
 728 static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
 729 {
 730         struct btusb_data *data = hci_get_drvdata(hdev);
 731         struct gpio_desc *reset_gpio = data->reset_gpio;
 732         int err;
 733
 734         if (++data->cmd_timeout_cnt < 5)
 735                 return;
 736
 737         if (reset_gpio) {
 738                 bt_dev_err(hdev, "Reset qca device via bt_en gpio");
 739
 740                 /* Toggle the hard reset line. The qca bt device is going to
 741                  * yank itself off the USB and then replug. The cleanup is handled
 742                  * correctly on the way out (standard USB disconnect), and the new
 743                  * device is detected cleanly and bound to the driver again like
 744                  * it should be.
 745                  */
 746                 if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
 747                         bt_dev_err(hdev, "last reset failed? Not resetting again");
 748                         return;
 749                 }
 750
 751                 gpiod_set_value_cansleep(reset_gpio, 0);
 752                 msleep(200);
 753                 gpiod_set_value_cansleep(reset_gpio, 1);
 754
 755                 return;
 756         }
 757
 758         bt_dev_err(hdev, "Multiple cmd timeouts seen. Resetting usb device.");
 759         /* This is not an unbalanced PM reference since the device will reset */
 760         err = usb_autopm_get_interface(data->intf);
 761         if (!err)
 762                 usb_queue_reset_device(data->intf);
 763         else
 764                 bt_dev_err(hdev, "Failed usb_autopm_get_interface with %d", err);
 765 }
 766
 767 static inline void btusb_free_frags(struct btusb_data *data)
 768 {
 769         unsigned long flags;
 770
 771         spin_lock_irqsave(&data->rxlock, flags);
 772
 773         kfree_skb(data->evt_skb);
 774         data->evt_skb = NULL;
 775
 776         kfree_skb(data->acl_skb);
 777         data->acl_skb = NULL;
 778
 779         kfree_skb(data->sco_skb);
 780         data->sco_skb = NULL;
 781
 782         spin_unlock_irqrestore(&data->rxlock, flags);
 783 }
 784
 785 static int btusb_recv_event(struct btusb_data *data, struct sk_buff *skb)
 786 {
 787         if (data->intr_interval) {
 788                 /* Trigger dequeue immediatelly if an event is received */
 789                 schedule_delayed_work(&data->rx_work, 0);
 790         }
 791
 792         return data->recv_event(data->hdev, skb);
 793 }
 794
 795 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
 796 {
 797         struct sk_buff *skb;
 798         unsigned long flags;
 799         int err = 0;
 800
 801         spin_lock_irqsave(&data->rxlock, flags);
 802         skb = data->evt_skb;
 803
 804         while (count) {
 805                 int len;
 806
 807                 if (!skb) {
 808                         skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
 809                         if (!skb) {
 810                                 err = -ENOMEM;
 811                                 break;
 812                         }
 813
 814                         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
 815                         hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
 816                 }
 817
 818                 len = min_t(uint, hci_skb_expect(skb), count);
 819                 skb_put_data(skb, buffer, len);
 820
 821                 count -= len;
 822                 buffer += len;
 823                 hci_skb_expect(skb) -= len;
 824
 825                 if (skb->len == HCI_EVENT_HDR_SIZE) {
 826                         /* Complete event header */
 827                         hci_skb_expect(skb) = hci_event_hdr(skb)->plen;
 828
 829                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 830                                 kfree_skb(skb);
 831                                 skb = NULL;
 832
 833                                 err = -EILSEQ;
 834                                 break;
 835                         }
 836                 }
 837
 838                 if (!hci_skb_expect(skb)) {
 839                         /* Complete frame */
 840                         btusb_recv_event(data, skb);
 841                         skb = NULL;
 842                 }
 843         }
 844
 845         data->evt_skb = skb;
 846         spin_unlock_irqrestore(&data->rxlock, flags);
 847
 848         return err;
 849 }
 850
 851 static int btusb_recv_acl(struct btusb_data *data, struct sk_buff *skb)
 852 {
 853         /* Only queue ACL packet if intr_interval is set as it means
 854          * force_poll_sync has been enabled.
 855          */
 856         if (!data->intr_interval)
 857                 return data->recv_acl(data->hdev, skb);
 858
 859         skb_queue_tail(&data->acl_q, skb);
 860         schedule_delayed_work(&data->rx_work, data->intr_interval);
 861
 862         return 0;
 863 }
 864
 865 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
 866 {
 867         struct sk_buff *skb;
 868         unsigned long flags;
 869         int err = 0;
 870
 871         spin_lock_irqsave(&data->rxlock, flags);
 872         skb = data->acl_skb;
 873
 874         while (count) {
 875                 int len;
 876
 877                 if (!skb) {
 878                         skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
 879                         if (!skb) {
 880                                 err = -ENOMEM;
 881                                 break;
 882                         }
 883
 884                         hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
 885                         hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
 886                 }
 887
 888                 len = min_t(uint, hci_skb_expect(skb), count);
 889                 skb_put_data(skb, buffer, len);
 890
 891                 count -= len;
 892                 buffer += len;
 893                 hci_skb_expect(skb) -= len;
 894
 895                 if (skb->len == HCI_ACL_HDR_SIZE) {
 896                         __le16 dlen = hci_acl_hdr(skb)->dlen;
 897
 898                         /* Complete ACL header */
 899                         hci_skb_expect(skb) = __le16_to_cpu(dlen);
 900
 901                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 902                                 kfree_skb(skb);
 903                                 skb = NULL;
 904
 905                                 err = -EILSEQ;
 906                                 break;
 907                         }
 908                 }
 909
 910                 if (!hci_skb_expect(skb)) {
 911                         /* Complete frame */
 912                         btusb_recv_acl(data, skb);
 913                         skb = NULL;
 914                 }
 915         }
 916
 917         data->acl_skb = skb;
 918         spin_unlock_irqrestore(&data->rxlock, flags);
 919
 920         return err;
 921 }
 922
 923 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
 924 {
 925         struct sk_buff *skb;
 926         unsigned long flags;
 927         int err = 0;
 928
 929         spin_lock_irqsave(&data->rxlock, flags);
 930         skb = data->sco_skb;
 931
 932         while (count) {
 933                 int len;
 934
 935                 if (!skb) {
 936                         skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
 937                         if (!skb) {
 938                                 err = -ENOMEM;
 939                                 break;
 940                         }
 941
 942                         hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
 943                         hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
 944                 }
 945
 946                 len = min_t(uint, hci_skb_expect(skb), count);
 947                 skb_put_data(skb, buffer, len);
 948
 949                 count -= len;
 950                 buffer += len;
 951                 hci_skb_expect(skb) -= len;
 952
 953                 if (skb->len == HCI_SCO_HDR_SIZE) {
 954                         /* Complete SCO header */
 955                         hci_skb_expect(skb) = hci_sco_hdr(skb)->dlen;
 956
 957                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 958                                 kfree_skb(skb);
 959                                 skb = NULL;
 960
 961                                 err = -EILSEQ;
 962                                 break;
 963                         }
 964                 }
 965
 966                 if (!hci_skb_expect(skb)) {
 967                         /* Complete frame */
 968                         hci_recv_frame(data->hdev, skb);
 969                         skb = NULL;
 970                 }
 971         }
 972
 973         data->sco_skb = skb;
 974         spin_unlock_irqrestore(&data->rxlock, flags);
 975
 976         return err;
 977 }
 978
 979 static void btusb_intr_complete(struct urb *urb)
 980 {
 981         struct hci_dev *hdev = urb->context;
 982         struct btusb_data *data = hci_get_drvdata(hdev);
 983         int err;
 984
 985         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
 986                urb->actual_length);
 987
 988         if (!test_bit(HCI_RUNNING, &hdev->flags))
 989                 return;
 990
 991         if (urb->status == 0) {
 992                 hdev->stat.byte_rx += urb->actual_length;
 993
 994                 if (btusb_recv_intr(data, urb->transfer_buffer,
 995                                     urb->actual_length) < 0) {
 996                         bt_dev_err(hdev, "corrupted event packet");
 997                         hdev->stat.err_rx++;
 998                 }
 999         } else if (urb->status == -ENOENT) {
1000                 /* Avoid suspend failed when usb_kill_urb */
1001                 return;
1002         }
1003
1004         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
1005                 return;
1006
1007         usb_mark_last_busy(data->udev);
1008         usb_anchor_urb(urb, &data->intr_anchor);
1009
1010         err = usb_submit_urb(urb, GFP_ATOMIC);
1011         if (err < 0) {
1012                 /* -EPERM: urb is being killed;
1013                  * -ENODEV: device got disconnected
1014                  */
1015                 if (err != -EPERM && err != -ENODEV)
1016                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1017                                    urb, -err);
1018                 if (err != -EPERM)
1019                         hci_cmd_sync_cancel(hdev, -err);
1020                 usb_unanchor_urb(urb);
1021         }
1022 }
1023
1024 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
1025 {
1026         struct btusb_data *data = hci_get_drvdata(hdev);
1027         struct urb *urb;
1028         unsigned char *buf;
1029         unsigned int pipe;
1030         int err, size;
1031
1032         BT_DBG("%s", hdev->name);
1033
1034         if (!data->intr_ep)
1035                 return -ENODEV;
1036
1037         urb = usb_alloc_urb(0, mem_flags);
1038         if (!urb)
1039                 return -ENOMEM;
1040
1041         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
1042
1043         buf = kmalloc(size, mem_flags);
1044         if (!buf) {
1045                 usb_free_urb(urb);
1046                 return -ENOMEM;
1047         }
1048
1049         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
1050
1051         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
1052                          btusb_intr_complete, hdev, data->intr_ep->bInterval);
1053
1054         urb->transfer_flags |= URB_FREE_BUFFER;
1055
1056         usb_anchor_urb(urb, &data->intr_anchor);
1057
1058         err = usb_submit_urb(urb, mem_flags);
1059         if (err < 0) {
1060                 if (err != -EPERM && err != -ENODEV)
1061                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1062                                    urb, -err);
1063                 if (err != -EPERM)
1064                         hci_cmd_sync_cancel(hdev, -err);
1065                 usb_unanchor_urb(urb);
1066         }
1067
1068         /* Only initialize intr_interval if URB poll sync is enabled */
1069         if (!data->poll_sync)
1070                 goto done;
1071
1072         /* The units are frames (milliseconds) for full and low speed devices,
1073          * and microframes (1/8 millisecond) for highspeed and SuperSpeed
1074          * devices.
1075          *
1076          * This is done once on open/resume so it shouldn't change even if
1077          * force_poll_sync changes.
1078          */
1079         switch (urb->dev->speed) {
1080         case USB_SPEED_SUPER_PLUS:
1081         case USB_SPEED_SUPER:   /* units are 125us */
1082                 data->intr_interval = usecs_to_jiffies(urb->interval * 125);
1083                 break;
1084         default:
1085                 data->intr_interval = msecs_to_jiffies(urb->interval);
1086                 break;
1087         }
1088
1089 done:
1090         usb_free_urb(urb);
1091
1092         return err;
1093 }
1094
1095 static void btusb_bulk_complete(struct urb *urb)
1096 {
1097         struct hci_dev *hdev = urb->context;
1098         struct btusb_data *data = hci_get_drvdata(hdev);
1099         int err;
1100
1101         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1102                urb->actual_length);
1103
1104         if (!test_bit(HCI_RUNNING, &hdev->flags))
1105                 return;
1106
1107         if (urb->status == 0) {
1108                 hdev->stat.byte_rx += urb->actual_length;
1109
1110                 if (data->recv_bulk(data, urb->transfer_buffer,
1111                                     urb->actual_length) < 0) {
1112                         bt_dev_err(hdev, "corrupted ACL packet");
1113                         hdev->stat.err_rx++;
1114                 }
1115         } else if (urb->status == -ENOENT) {
1116                 /* Avoid suspend failed when usb_kill_urb */
1117                 return;
1118         }
1119
1120         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
1121                 return;
1122
1123         usb_anchor_urb(urb, &data->bulk_anchor);
1124         usb_mark_last_busy(data->udev);
1125
1126         err = usb_submit_urb(urb, GFP_ATOMIC);
1127         if (err < 0) {
1128                 /* -EPERM: urb is being killed;
1129                  * -ENODEV: device got disconnected
1130                  */
1131                 if (err != -EPERM && err != -ENODEV)
1132                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1133                                    urb, -err);
1134                 usb_unanchor_urb(urb);
1135         }
1136 }
1137
1138 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
1139 {
1140         struct btusb_data *data = hci_get_drvdata(hdev);
1141         struct urb *urb;
1142         unsigned char *buf;
1143         unsigned int pipe;
1144         int err, size = HCI_MAX_FRAME_SIZE;
1145
1146         BT_DBG("%s", hdev->name);
1147
1148         if (!data->bulk_rx_ep)
1149                 return -ENODEV;
1150
1151         urb = usb_alloc_urb(0, mem_flags);
1152         if (!urb)
1153                 return -ENOMEM;
1154
1155         buf = kmalloc(size, mem_flags);
1156         if (!buf) {
1157                 usb_free_urb(urb);
1158                 return -ENOMEM;
1159         }
1160
1161         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
1162
1163         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1164                           btusb_bulk_complete, hdev);
1165
1166         urb->transfer_flags |= URB_FREE_BUFFER;
1167
1168         usb_mark_last_busy(data->udev);
1169         usb_anchor_urb(urb, &data->bulk_anchor);
1170
1171         err = usb_submit_urb(urb, mem_flags);
1172         if (err < 0) {
1173                 if (err != -EPERM && err != -ENODEV)
1174                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1175                                    urb, -err);
1176                 usb_unanchor_urb(urb);
1177         }
1178
1179         usb_free_urb(urb);
1180
1181         return err;
1182 }
1183
1184 static void btusb_isoc_complete(struct urb *urb)
1185 {
1186         struct hci_dev *hdev = urb->context;
1187         struct btusb_data *data = hci_get_drvdata(hdev);
1188         int i, err;
1189
1190         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1191                urb->actual_length);
1192
1193         if (!test_bit(HCI_RUNNING, &hdev->flags))
1194                 return;
1195
1196         if (urb->status == 0) {
1197                 for (i = 0; i < urb->number_of_packets; i++) {
1198                         unsigned int offset = urb->iso_frame_desc[i].offset;
1199                         unsigned int length = urb->iso_frame_desc[i].actual_length;
1200
1201                         if (urb->iso_frame_desc[i].status)
1202                                 continue;
1203
1204                         hdev->stat.byte_rx += length;
1205
1206                         if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
1207                                             length) < 0) {
1208                                 bt_dev_err(hdev, "corrupted SCO packet");
1209                                 hdev->stat.err_rx++;
1210                         }
1211                 }
1212         } else if (urb->status == -ENOENT) {
1213                 /* Avoid suspend failed when usb_kill_urb */
1214                 return;
1215         }
1216
1217         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
1218                 return;
1219
1220         usb_anchor_urb(urb, &data->isoc_anchor);
1221
1222         err = usb_submit_urb(urb, GFP_ATOMIC);
1223         if (err < 0) {
1224                 /* -EPERM: urb is being killed;
1225                  * -ENODEV: device got disconnected
1226                  */
1227                 if (err != -EPERM && err != -ENODEV)
1228                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1229                                    urb, -err);
1230                 usb_unanchor_urb(urb);
1231         }
1232 }
1233
1234 static inline void __fill_isoc_descriptor_msbc(struct urb *urb, int len,
1235                                                int mtu, struct btusb_data *data)
1236 {
1237         int i, offset = 0;
1238         unsigned int interval;
1239
1240         BT_DBG("len %d mtu %d", len, mtu);
1241
1242         /* For mSBC ALT 6 setting the host will send the packet at continuous
1243          * flow. As per core spec 5, vol 4, part B, table 2.1. For ALT setting
1244          * 6 the HCI PACKET INTERVAL should be 7.5ms for every usb packets.
1245          * To maintain the rate we send 63bytes of usb packets alternatively for
1246          * 7ms and 8ms to maintain the rate as 7.5ms.
1247          */
1248         if (data->usb_alt6_packet_flow) {
1249                 interval = 7;
1250                 data->usb_alt6_packet_flow = false;
1251         } else {
1252                 interval = 6;
1253                 data->usb_alt6_packet_flow = true;
1254         }
1255
1256         for (i = 0; i < interval; i++) {
1257                 urb->iso_frame_desc[i].offset = offset;
1258                 urb->iso_frame_desc[i].length = offset;
1259         }
1260
1261         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1262                 urb->iso_frame_desc[i].offset = offset;
1263                 urb->iso_frame_desc[i].length = len;
1264                 i++;
1265         }
1266
1267         urb->number_of_packets = i;
1268 }
1269
1270 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
1271 {
1272         int i, offset = 0;
1273
1274         BT_DBG("len %d mtu %d", len, mtu);
1275
1276         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
1277                                         i++, offset += mtu, len -= mtu) {
1278                 urb->iso_frame_desc[i].offset = offset;
1279                 urb->iso_frame_desc[i].length = mtu;
1280         }
1281
1282         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1283                 urb->iso_frame_desc[i].offset = offset;
1284                 urb->iso_frame_desc[i].length = len;
1285                 i++;
1286         }
1287
1288         urb->number_of_packets = i;
1289 }
1290
1291 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
1292 {
1293         struct btusb_data *data = hci_get_drvdata(hdev);
1294         struct urb *urb;
1295         unsigned char *buf;
1296         unsigned int pipe;
1297         int err, size;
1298
1299         BT_DBG("%s", hdev->name);
1300
1301         if (!data->isoc_rx_ep)
1302                 return -ENODEV;
1303
1304         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
1305         if (!urb)
1306                 return -ENOMEM;
1307
1308         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
1309                                                 BTUSB_MAX_ISOC_FRAMES;
1310
1311         buf = kmalloc(size, mem_flags);
1312         if (!buf) {
1313                 usb_free_urb(urb);
1314                 return -ENOMEM;
1315         }
1316
1317         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
1318
1319         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
1320                          hdev, data->isoc_rx_ep->bInterval);
1321
1322         urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
1323
1324         __fill_isoc_descriptor(urb, size,
1325                                le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
1326
1327         usb_anchor_urb(urb, &data->isoc_anchor);
1328
1329         err = usb_submit_urb(urb, mem_flags);
1330         if (err < 0) {
1331                 if (err != -EPERM && err != -ENODEV)
1332                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1333                                    urb, -err);
1334                 usb_unanchor_urb(urb);
1335         }
1336
1337         usb_free_urb(urb);
1338
1339         return err;
1340 }
1341
1342 static void btusb_diag_complete(struct urb *urb)
1343 {
1344         struct hci_dev *hdev = urb->context;
1345         struct btusb_data *data = hci_get_drvdata(hdev);
1346         int err;
1347
1348         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1349                urb->actual_length);
1350
1351         if (urb->status == 0) {
1352                 struct sk_buff *skb;
1353
1354                 skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
1355                 if (skb) {
1356                         skb_put_data(skb, urb->transfer_buffer,
1357                                      urb->actual_length);
1358                         hci_recv_diag(hdev, skb);
1359                 }
1360         } else if (urb->status == -ENOENT) {
1361                 /* Avoid suspend failed when usb_kill_urb */
1362                 return;
1363         }
1364
1365         if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
1366                 return;
1367
1368         usb_anchor_urb(urb, &data->diag_anchor);
1369         usb_mark_last_busy(data->udev);
1370
1371         err = usb_submit_urb(urb, GFP_ATOMIC);
1372         if (err < 0) {
1373                 /* -EPERM: urb is being killed;
1374                  * -ENODEV: device got disconnected
1375                  */
1376                 if (err != -EPERM && err != -ENODEV)
1377                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1378                                    urb, -err);
1379                 usb_unanchor_urb(urb);
1380         }
1381 }
1382
1383 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
1384 {
1385         struct btusb_data *data = hci_get_drvdata(hdev);
1386         struct urb *urb;
1387         unsigned char *buf;
1388         unsigned int pipe;
1389         int err, size = HCI_MAX_FRAME_SIZE;
1390
1391         BT_DBG("%s", hdev->name);
1392
1393         if (!data->diag_rx_ep)
1394                 return -ENODEV;
1395
1396         urb = usb_alloc_urb(0, mem_flags);
1397         if (!urb)
1398                 return -ENOMEM;
1399
1400         buf = kmalloc(size, mem_flags);
1401         if (!buf) {
1402                 usb_free_urb(urb);
1403                 return -ENOMEM;
1404         }
1405
1406         pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
1407
1408         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1409                           btusb_diag_complete, hdev);
1410
1411         urb->transfer_flags |= URB_FREE_BUFFER;
1412
1413         usb_mark_last_busy(data->udev);
1414         usb_anchor_urb(urb, &data->diag_anchor);
1415
1416         err = usb_submit_urb(urb, mem_flags);
1417         if (err < 0) {
1418                 if (err != -EPERM && err != -ENODEV)
1419                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1420                                    urb, -err);
1421                 usb_unanchor_urb(urb);
1422         }
1423
1424         usb_free_urb(urb);
1425
1426         return err;
1427 }
1428
1429 static void btusb_tx_complete(struct urb *urb)
1430 {
1431         struct sk_buff *skb = urb->context;
1432         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1433         struct btusb_data *data = hci_get_drvdata(hdev);
1434         unsigned long flags;
1435
1436         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1437                urb->actual_length);
1438
1439         if (!test_bit(HCI_RUNNING, &hdev->flags))
1440                 goto done;
1441
1442         if (!urb->status) {
1443                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1444         } else {
1445                 if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT)
1446                         hci_cmd_sync_cancel(hdev, -urb->status);
1447                 hdev->stat.err_tx++;
1448         }
1449
1450 done:
1451         spin_lock_irqsave(&data->txlock, flags);
1452         data->tx_in_flight--;
1453         spin_unlock_irqrestore(&data->txlock, flags);
1454
1455         kfree(urb->setup_packet);
1456
1457         kfree_skb(skb);
1458 }
1459
1460 static void btusb_isoc_tx_complete(struct urb *urb)
1461 {
1462         struct sk_buff *skb = urb->context;
1463         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1464
1465         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1466                urb->actual_length);
1467
1468         if (!test_bit(HCI_RUNNING, &hdev->flags))
1469                 goto done;
1470
1471         if (!urb->status)
1472                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1473         else
1474                 hdev->stat.err_tx++;
1475
1476 done:
1477         kfree(urb->setup_packet);
1478
1479         kfree_skb(skb);
1480 }
1481
1482 static int btusb_open(struct hci_dev *hdev)
1483 {
1484         struct btusb_data *data = hci_get_drvdata(hdev);
1485         int err;
1486
1487         BT_DBG("%s", hdev->name);
1488
1489         err = usb_autopm_get_interface(data->intf);
1490         if (err < 0)
1491                 return err;
1492
1493         /* Patching USB firmware files prior to starting any URBs of HCI path
1494          * It is more safe to use USB bulk channel for downloading USB patch
1495          */
1496         if (data->setup_on_usb) {
1497                 err = data->setup_on_usb(hdev);
1498                 if (err < 0)
1499                         goto setup_fail;
1500         }
1501
1502         data->intf->needs_remote_wakeup = 1;
1503
1504         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1505                 goto done;
1506
1507         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1508         if (err < 0)
1509                 goto failed;
1510
1511         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1512         if (err < 0) {
1513                 usb_kill_anchored_urbs(&data->intr_anchor);
1514                 goto failed;
1515         }
1516
1517         set_bit(BTUSB_BULK_RUNNING, &data->flags);
1518         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1519
1520         if (data->diag) {
1521                 if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1522                         set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1523         }
1524
1525 done:
1526         usb_autopm_put_interface(data->intf);
1527         return 0;
1528
1529 failed:
1530         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1531 setup_fail:
1532         usb_autopm_put_interface(data->intf);
1533         return err;
1534 }
1535
1536 static void btusb_stop_traffic(struct btusb_data *data)
1537 {
1538         usb_kill_anchored_urbs(&data->intr_anchor);
1539         usb_kill_anchored_urbs(&data->bulk_anchor);
1540         usb_kill_anchored_urbs(&data->isoc_anchor);
1541         usb_kill_anchored_urbs(&data->diag_anchor);
1542         usb_kill_anchored_urbs(&data->ctrl_anchor);
1543 }
1544
1545 static int btusb_close(struct hci_dev *hdev)
1546 {
1547         struct btusb_data *data = hci_get_drvdata(hdev);
1548         int err;
1549
1550         BT_DBG("%s", hdev->name);
1551
1552         cancel_delayed_work(&data->rx_work);
1553         cancel_work_sync(&data->work);
1554         cancel_work_sync(&data->waker);
1555
1556         skb_queue_purge(&data->acl_q);
1557
1558         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1559         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1560         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1561         clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1562
1563         btusb_stop_traffic(data);
1564         btusb_free_frags(data);
1565
1566         err = usb_autopm_get_interface(data->intf);
1567         if (err < 0)
1568                 goto failed;
1569
1570         data->intf->needs_remote_wakeup = 0;
1571
1572         /* Enable remote wake up for auto-suspend */
1573         if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags))
1574                 data->intf->needs_remote_wakeup = 1;
1575
1576         usb_autopm_put_interface(data->intf);
1577
1578 failed:
1579         usb_scuttle_anchored_urbs(&data->deferred);
1580         return 0;
1581 }
1582
1583 static int btusb_flush(struct hci_dev *hdev)
1584 {
1585         struct btusb_data *data = hci_get_drvdata(hdev);
1586
1587         BT_DBG("%s", hdev->name);
1588
1589         cancel_delayed_work(&data->rx_work);
1590
1591         skb_queue_purge(&data->acl_q);
1592
1593         usb_kill_anchored_urbs(&data->tx_anchor);
1594         btusb_free_frags(data);
1595
1596         return 0;
1597 }
1598
1599 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1600 {
1601         struct btusb_data *data = hci_get_drvdata(hdev);
1602         struct usb_ctrlrequest *dr;
1603         struct urb *urb;
1604         unsigned int pipe;
1605
1606         urb = usb_alloc_urb(0, GFP_KERNEL);
1607         if (!urb)
1608                 return ERR_PTR(-ENOMEM);
1609
1610         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1611         if (!dr) {
1612                 usb_free_urb(urb);
1613                 return ERR_PTR(-ENOMEM);
1614         }
1615
1616         dr->bRequestType = data->cmdreq_type;
1617         dr->bRequest     = data->cmdreq;
1618         dr->wIndex       = 0;
1619         dr->wValue       = 0;
1620         dr->wLength      = __cpu_to_le16(skb->len);
1621
1622         pipe = usb_sndctrlpipe(data->udev, 0x00);
1623
1624         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1625                              skb->data, skb->len, btusb_tx_complete, skb);
1626
1627         skb->dev = (void *)hdev;
1628
1629         return urb;
1630 }
1631
1632 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1633 {
1634         struct btusb_data *data = hci_get_drvdata(hdev);
1635         struct urb *urb;
1636         unsigned int pipe;
1637
1638         if (!data->bulk_tx_ep)
1639                 return ERR_PTR(-ENODEV);
1640
1641         urb = usb_alloc_urb(0, GFP_KERNEL);
1642         if (!urb)
1643                 return ERR_PTR(-ENOMEM);
1644
1645         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1646
1647         usb_fill_bulk_urb(urb, data->udev, pipe,
1648                           skb->data, skb->len, btusb_tx_complete, skb);
1649
1650         skb->dev = (void *)hdev;
1651
1652         return urb;
1653 }
1654
1655 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1656 {
1657         struct btusb_data *data = hci_get_drvdata(hdev);
1658         struct urb *urb;
1659         unsigned int pipe;
1660
1661         if (!data->isoc_tx_ep)
1662                 return ERR_PTR(-ENODEV);
1663
1664         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1665         if (!urb)
1666                 return ERR_PTR(-ENOMEM);
1667
1668         pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1669
1670         usb_fill_int_urb(urb, data->udev, pipe,
1671                          skb->data, skb->len, btusb_isoc_tx_complete,
1672                          skb, data->isoc_tx_ep->bInterval);
1673
1674         urb->transfer_flags  = URB_ISO_ASAP;
1675
1676         if (data->isoc_altsetting == 6)
1677                 __fill_isoc_descriptor_msbc(urb, skb->len,
1678                                             le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize),
1679                                             data);
1680         else
1681                 __fill_isoc_descriptor(urb, skb->len,
1682                                        le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1683         skb->dev = (void *)hdev;
1684
1685         return urb;
1686 }
1687
1688 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1689 {
1690         struct btusb_data *data = hci_get_drvdata(hdev);
1691         int err;
1692
1693         usb_anchor_urb(urb, &data->tx_anchor);
1694
1695         err = usb_submit_urb(urb, GFP_KERNEL);
1696         if (err < 0) {
1697                 if (err != -EPERM && err != -ENODEV)
1698                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1699                                    urb, -err);
1700                 kfree(urb->setup_packet);
1701                 usb_unanchor_urb(urb);
1702         } else {
1703                 usb_mark_last_busy(data->udev);
1704         }
1705
1706         usb_free_urb(urb);
1707         return err;
1708 }
1709
1710 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1711 {
1712         struct btusb_data *data = hci_get_drvdata(hdev);
1713         unsigned long flags;
1714         bool suspending;
1715
1716         spin_lock_irqsave(&data->txlock, flags);
1717         suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1718         if (!suspending)
1719                 data->tx_in_flight++;
1720         spin_unlock_irqrestore(&data->txlock, flags);
1721
1722         if (!suspending)
1723                 return submit_tx_urb(hdev, urb);
1724
1725         usb_anchor_urb(urb, &data->deferred);
1726         schedule_work(&data->waker);
1727
1728         usb_free_urb(urb);
1729         return 0;
1730 }
1731
1732 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1733 {
1734         struct urb *urb;
1735
1736         BT_DBG("%s", hdev->name);
1737
1738         switch (hci_skb_pkt_type(skb)) {
1739         case HCI_COMMAND_PKT:
1740                 urb = alloc_ctrl_urb(hdev, skb);
1741                 if (IS_ERR(urb))
1742                         return PTR_ERR(urb);
1743
1744                 hdev->stat.cmd_tx++;
1745                 return submit_or_queue_tx_urb(hdev, urb);
1746
1747         case HCI_ACLDATA_PKT:
1748                 urb = alloc_bulk_urb(hdev, skb);
1749                 if (IS_ERR(urb))
1750                         return PTR_ERR(urb);
1751
1752                 hdev->stat.acl_tx++;
1753                 return submit_or_queue_tx_urb(hdev, urb);
1754
1755         case HCI_SCODATA_PKT:
1756                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1757                         return -ENODEV;
1758
1759                 urb = alloc_isoc_urb(hdev, skb);
1760                 if (IS_ERR(urb))
1761                         return PTR_ERR(urb);
1762
1763                 hdev->stat.sco_tx++;
1764                 return submit_tx_urb(hdev, urb);
1765         }
1766
1767         return -EILSEQ;
1768 }
1769
1770 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1771 {
1772         struct btusb_data *data = hci_get_drvdata(hdev);
1773
1774         BT_DBG("%s evt %d", hdev->name, evt);
1775
1776         if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1777                 data->sco_num = hci_conn_num(hdev, SCO_LINK);
1778                 data->air_mode = evt;
1779                 schedule_work(&data->work);
1780         }
1781 }
1782
1783 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1784 {
1785         struct btusb_data *data = hci_get_drvdata(hdev);
1786         struct usb_interface *intf = data->isoc;
1787         struct usb_endpoint_descriptor *ep_desc;
1788         int i, err;
1789
1790         if (!data->isoc)
1791                 return -ENODEV;
1792
1793         err = usb_set_interface(data->udev, data->isoc_ifnum, altsetting);
1794         if (err < 0) {
1795                 bt_dev_err(hdev, "setting interface failed (%d)", -err);
1796                 return err;
1797         }
1798
1799         data->isoc_altsetting = altsetting;
1800
1801         data->isoc_tx_ep = NULL;
1802         data->isoc_rx_ep = NULL;
1803
1804         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1805                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1806
1807                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1808                         data->isoc_tx_ep = ep_desc;
1809                         continue;
1810                 }
1811
1812                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1813                         data->isoc_rx_ep = ep_desc;
1814                         continue;
1815                 }
1816         }
1817
1818         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1819                 bt_dev_err(hdev, "invalid SCO descriptors");
1820                 return -ENODEV;
1821         }
1822
1823         return 0;
1824 }
1825
1826 static int btusb_switch_alt_setting(struct hci_dev *hdev, int new_alts)
1827 {
1828         struct btusb_data *data = hci_get_drvdata(hdev);
1829         int err;
1830
1831         if (data->isoc_altsetting != new_alts) {
1832                 unsigned long flags;
1833
1834                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1835                 usb_kill_anchored_urbs(&data->isoc_anchor);
1836
1837                 /* When isochronous alternate setting needs to be
1838                  * changed, because SCO connection has been added
1839                  * or removed, a packet fragment may be left in the
1840                  * reassembling state. This could lead to wrongly
1841                  * assembled fragments.
1842                  *
1843                  * Clear outstanding fragment when selecting a new
1844                  * alternate setting.
1845                  */
1846                 spin_lock_irqsave(&data->rxlock, flags);
1847                 kfree_skb(data->sco_skb);
1848                 data->sco_skb = NULL;
1849                 spin_unlock_irqrestore(&data->rxlock, flags);
1850
1851                 err = __set_isoc_interface(hdev, new_alts);
1852                 if (err < 0)
1853                         return err;
1854         }
1855
1856         if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1857                 if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1858                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1859                 else
1860                         btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1861         }
1862
1863         return 0;
1864 }
1865
1866 static struct usb_host_interface *btusb_find_altsetting(struct btusb_data *data,
1867                                                         int alt)
1868 {
1869         struct usb_interface *intf = data->isoc;
1870         int i;
1871
1872         BT_DBG("Looking for Alt no :%d", alt);
1873
1874         if (!intf)
1875                 return NULL;
1876
1877         for (i = 0; i < intf->num_altsetting; i++) {
1878                 if (intf->altsetting[i].desc.bAlternateSetting == alt)
1879                         return &intf->altsetting[i];
1880         }
1881
1882         return NULL;
1883 }
1884
1885 static void btusb_work(struct work_struct *work)
1886 {
1887         struct btusb_data *data = container_of(work, struct btusb_data, work);
1888         struct hci_dev *hdev = data->hdev;
1889         int new_alts = 0;
1890         int err;
1891
1892         if (data->sco_num > 0) {
1893                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1894                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1895                         if (err < 0) {
1896                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1897                                 usb_kill_anchored_urbs(&data->isoc_anchor);
1898                                 return;
1899                         }
1900
1901                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1902                 }
1903
1904                 if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_CVSD) {
1905                         if (hdev->voice_setting & 0x0020) {
1906                                 static const int alts[3] = { 2, 4, 5 };
1907
1908                                 new_alts = alts[data->sco_num - 1];
1909                         } else {
1910                                 new_alts = data->sco_num;
1911                         }
1912                 } else if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_TRANSP) {
1913                         /* Bluetooth USB spec recommends alt 6 (63 bytes), but
1914                          * many adapters do not support it.  Alt 1 appears to
1915                          * work for all adapters that do not have alt 6, and
1916                          * which work with WBS at all.  Some devices prefer
1917                          * alt 3 (HCI payload >= 60 Bytes let air packet
1918                          * data satisfy 60 bytes), requiring
1919                          * MTU >= 3 (packets) * 25 (size) - 3 (headers) = 72
1920                          * see also Core spec 5, vol 4, B 2.1.1 & Table 2.1.
1921                          */
1922                         if (btusb_find_altsetting(data, 6))
1923                                 new_alts = 6;
1924                         else if (btusb_find_altsetting(data, 3) &&
1925                                  hdev->sco_mtu >= 72 &&
1926                                  test_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags))
1927                                 new_alts = 3;
1928                         else
1929                                 new_alts = 1;
1930                 }
1931
1932                 if (btusb_switch_alt_setting(hdev, new_alts) < 0)
1933                         bt_dev_err(hdev, "set USB alt:(%d) failed!", new_alts);
1934         } else {
1935                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1936                 usb_kill_anchored_urbs(&data->isoc_anchor);
1937
1938                 __set_isoc_interface(hdev, 0);
1939                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1940                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1941         }
1942 }
1943
1944 static void btusb_waker(struct work_struct *work)
1945 {
1946         struct btusb_data *data = container_of(work, struct btusb_data, waker);
1947         int err;
1948
1949         err = usb_autopm_get_interface(data->intf);
1950         if (err < 0)
1951                 return;
1952
1953         usb_autopm_put_interface(data->intf);
1954 }
1955
1956 static void btusb_rx_work(struct work_struct *work)
1957 {
1958         struct btusb_data *data = container_of(work, struct btusb_data,
1959                                                rx_work.work);
1960         struct sk_buff *skb;
1961
1962         /* Dequeue ACL data received during the interval */
1963         while ((skb = skb_dequeue(&data->acl_q)))
1964                 data->recv_acl(data->hdev, skb);
1965 }
1966
1967 static int btusb_setup_bcm92035(struct hci_dev *hdev)
1968 {
1969         struct sk_buff *skb;
1970         u8 val = 0x00;
1971
1972         BT_DBG("%s", hdev->name);
1973
1974         skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
1975         if (IS_ERR(skb))
1976                 bt_dev_err(hdev, "BCM92035 command failed (%ld)", PTR_ERR(skb));
1977         else
1978                 kfree_skb(skb);
1979
1980         return 0;
1981 }
1982
1983 static int btusb_setup_csr(struct hci_dev *hdev)
1984 {
1985         struct btusb_data *data = hci_get_drvdata(hdev);
1986         u16 bcdDevice = le16_to_cpu(data->udev->descriptor.bcdDevice);
1987         struct hci_rp_read_local_version *rp;
1988         struct sk_buff *skb;
1989         bool is_fake = false;
1990         int ret;
1991
1992         BT_DBG("%s", hdev->name);
1993
1994         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
1995                              HCI_INIT_TIMEOUT);
1996         if (IS_ERR(skb)) {
1997                 int err = PTR_ERR(skb);
1998                 bt_dev_err(hdev, "CSR: Local version failed (%d)", err);
1999                 return err;
2000         }
2001
2002         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
2003                 bt_dev_err(hdev, "CSR: Local version length mismatch");
2004                 kfree_skb(skb);
2005                 return -EIO;
2006         }
2007
2008         rp = (struct hci_rp_read_local_version *)skb->data;
2009
2010         /* Detect a wide host of Chinese controllers that aren't CSR.
2011          *
2012          * Known fake bcdDevices: 0x0100, 0x0134, 0x1915, 0x2520, 0x7558, 0x8891
2013          *
2014          * The main thing they have in common is that these are really popular low-cost
2015          * options that support newer Bluetooth versions but rely on heavy VID/PID
2016          * squatting of this poor old Bluetooth 1.1 device. Even sold as such.
2017          *
2018          * We detect actual CSR devices by checking that the HCI manufacturer code
2019          * is Cambridge Silicon Radio (10) and ensuring that LMP sub-version and
2020          * HCI rev values always match. As they both store the firmware number.
2021          */
2022         if (le16_to_cpu(rp->manufacturer) != 10 ||
2023             le16_to_cpu(rp->hci_rev) != le16_to_cpu(rp->lmp_subver))
2024                 is_fake = true;
2025
2026         /* Known legit CSR firmware build numbers and their supported BT versions:
2027          * - 1.1 (0x1) -> 0x0073, 0x020d, 0x033c, 0x034e
2028          * - 1.2 (0x2) ->                 0x04d9, 0x0529
2029          * - 2.0 (0x3) ->         0x07a6, 0x07ad, 0x0c5c
2030          * - 2.1 (0x4) ->         0x149c, 0x1735, 0x1899 (0x1899 is a BlueCore4-External)
2031          * - 4.0 (0x6) ->         0x1d86, 0x2031, 0x22bb
2032          *
2033          * e.g. Real CSR dongles with LMP subversion 0x73 are old enough that
2034          *      support BT 1.1 only; so it's a dead giveaway when some
2035          *      third-party BT 4.0 dongle reuses it.
2036          */
2037         else if (le16_to_cpu(rp->lmp_subver) <= 0x034e &&
2038                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_1)
2039                 is_fake = true;
2040
2041         else if (le16_to_cpu(rp->lmp_subver) <= 0x0529 &&
2042                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_2)
2043                 is_fake = true;
2044
2045         else if (le16_to_cpu(rp->lmp_subver) <= 0x0c5c &&
2046                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_0)
2047                 is_fake = true;
2048
2049         else if (le16_to_cpu(rp->lmp_subver) <= 0x1899 &&
2050                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_1)
2051                 is_fake = true;
2052
2053         else if (le16_to_cpu(rp->lmp_subver) <= 0x22bb &&
2054                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_4_0)
2055                 is_fake = true;
2056
2057         /* Other clones which beat all the above checks */
2058         else if (bcdDevice == 0x0134 &&
2059                  le16_to_cpu(rp->lmp_subver) == 0x0c5c &&
2060                  le16_to_cpu(rp->hci_ver) == BLUETOOTH_VER_2_0)
2061                 is_fake = true;
2062
2063         if (is_fake) {
2064                 bt_dev_warn(hdev, "CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once...");
2065
2066                 /* Generally these clones have big discrepancies between
2067                  * advertised features and what's actually supported.
2068                  * Probably will need to be expanded in the future;
2069                  * without these the controller will lock up.
2070                  */
2071                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
2072                 set_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks);
2073                 set_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks);
2074                 set_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks);
2075
2076                 /* Clear the reset quirk since this is not an actual
2077                  * early Bluetooth 1.1 device from CSR.
2078                  */
2079                 clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2080                 clear_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2081
2082                 /*
2083                  * Special workaround for these BT 4.0 chip clones, and potentially more:
2084                  *
2085                  * - 0x0134: a Barrot 8041a02                 (HCI rev: 0x0810 sub: 0x1012)
2086                  * - 0x7558: IC markings FR3191AHAL 749H15143 (HCI rev/sub-version: 0x0709)
2087                  *
2088                  * These controllers are really messed-up.
2089                  *
2090                  * 1. Their bulk RX endpoint will never report any data unless
2091                  *    the device was suspended at least once (yes, really).
2092                  * 2. They will not wakeup when autosuspended and receiving data
2093                  *    on their bulk RX endpoint from e.g. a keyboard or mouse
2094                  *    (IOW remote-wakeup support is broken for the bulk endpoint).
2095                  *
2096                  * To fix 1. enable runtime-suspend, force-suspend the
2097                  * HCI and then wake-it up by disabling runtime-suspend.
2098                  *
2099                  * To fix 2. clear the HCI's can_wake flag, this way the HCI
2100                  * will still be autosuspended when it is not open.
2101                  *
2102                  * --
2103                  *
2104                  * Because these are widespread problems we prefer generic solutions; so
2105                  * apply this initialization quirk to every controller that gets here,
2106                  * it should be harmless. The alternative is to not work at all.
2107                  */
2108                 pm_runtime_allow(&data->udev->dev);
2109
2110                 ret = pm_runtime_suspend(&data->udev->dev);
2111                 if (ret >= 0)
2112                         msleep(200);
2113                 else
2114                         bt_dev_warn(hdev, "CSR: Couldn't suspend the device for our Barrot 8041a02 receive-issue workaround");
2115
2116                 pm_runtime_forbid(&data->udev->dev);
2117
2118                 device_set_wakeup_capable(&data->udev->dev, false);
2119
2120                 /* Re-enable autosuspend if this was requested */
2121                 if (enable_autosuspend)
2122                         usb_enable_autosuspend(data->udev);
2123         }
2124
2125         kfree_skb(skb);
2126
2127         return 0;
2128 }
2129
2130 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
2131 {
2132         struct sk_buff *skb;
2133         struct hci_event_hdr *hdr;
2134         struct hci_ev_cmd_complete *evt;
2135
2136         skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
2137         if (!skb)
2138                 return -ENOMEM;
2139
2140         hdr = skb_put(skb, sizeof(*hdr));
2141         hdr->evt = HCI_EV_CMD_COMPLETE;
2142         hdr->plen = sizeof(*evt) + 1;
2143
2144         evt = skb_put(skb, sizeof(*evt));
2145         evt->ncmd = 0x01;
2146         evt->opcode = cpu_to_le16(opcode);
2147
2148         skb_put_u8(skb, 0x00);
2149
2150         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2151
2152         return hci_recv_frame(hdev, skb);
2153 }
2154
2155 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
2156                                  int count)
2157 {
2158         struct hci_dev *hdev = data->hdev;
2159
2160         /* When the device is in bootloader mode, then it can send
2161          * events via the bulk endpoint. These events are treated the
2162          * same way as the ones received from the interrupt endpoint.
2163          */
2164         if (btintel_test_flag(hdev, INTEL_BOOTLOADER))
2165                 return btusb_recv_intr(data, buffer, count);
2166
2167         return btusb_recv_bulk(data, buffer, count);
2168 }
2169
2170 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
2171 {
2172         if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
2173                 struct hci_event_hdr *hdr = (void *)skb->data;
2174
2175                 if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
2176                     hdr->plen > 0) {
2177                         const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
2178                         unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
2179
2180                         switch (skb->data[2]) {
2181                         case 0x02:
2182                                 /* When switching to the operational firmware
2183                                  * the device sends a vendor specific event
2184                                  * indicating that the bootup completed.
2185                                  */
2186                                 btintel_bootup(hdev, ptr, len);
2187                                 break;
2188                         case 0x06:
2189                                 /* When the firmware loading completes the
2190                                  * device sends out a vendor specific event
2191                                  * indicating the result of the firmware
2192                                  * loading.
2193                                  */
2194                                 btintel_secure_send_result(hdev, ptr, len);
2195                                 break;
2196                         }
2197                 }
2198         }
2199
2200         return hci_recv_frame(hdev, skb);
2201 }
2202
2203 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
2204 {
2205         struct urb *urb;
2206
2207         BT_DBG("%s", hdev->name);
2208
2209         switch (hci_skb_pkt_type(skb)) {
2210         case HCI_COMMAND_PKT:
2211                 if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
2212                         struct hci_command_hdr *cmd = (void *)skb->data;
2213                         __u16 opcode = le16_to_cpu(cmd->opcode);
2214
2215                         /* When in bootloader mode and the command 0xfc09
2216                          * is received, it needs to be send down the
2217                          * bulk endpoint. So allocate a bulk URB instead.
2218                          */
2219                         if (opcode == 0xfc09)
2220                                 urb = alloc_bulk_urb(hdev, skb);
2221                         else
2222                                 urb = alloc_ctrl_urb(hdev, skb);
2223
2224                         /* When the 0xfc01 command is issued to boot into
2225                          * the operational firmware, it will actually not
2226                          * send a command complete event. To keep the flow
2227                          * control working inject that event here.
2228                          */
2229                         if (opcode == 0xfc01)
2230                                 inject_cmd_complete(hdev, opcode);
2231                 } else {
2232                         urb = alloc_ctrl_urb(hdev, skb);
2233                 }
2234                 if (IS_ERR(urb))
2235                         return PTR_ERR(urb);
2236
2237                 hdev->stat.cmd_tx++;
2238                 return submit_or_queue_tx_urb(hdev, urb);
2239
2240         case HCI_ACLDATA_PKT:
2241                 urb = alloc_bulk_urb(hdev, skb);
2242                 if (IS_ERR(urb))
2243                         return PTR_ERR(urb);
2244
2245                 hdev->stat.acl_tx++;
2246                 return submit_or_queue_tx_urb(hdev, urb);
2247
2248         case HCI_SCODATA_PKT:
2249                 if (hci_conn_num(hdev, SCO_LINK) < 1)
2250                         return -ENODEV;
2251
2252                 urb = alloc_isoc_urb(hdev, skb);
2253                 if (IS_ERR(urb))
2254                         return PTR_ERR(urb);
2255
2256                 hdev->stat.sco_tx++;
2257                 return submit_tx_urb(hdev, urb);
2258         }
2259
2260         return -EILSEQ;
2261 }
2262
2263 /* UHW CR mapping */
2264 #define MTK_BT_MISC             0x70002510
2265 #define MTK_BT_SUBSYS_RST       0x70002610
2266 #define MTK_UDMA_INT_STA_BT     0x74000024
2267 #define MTK_UDMA_INT_STA_BT1    0x74000308
2268 #define MTK_BT_WDT_STATUS       0x740003A0
2269 #define MTK_EP_RST_OPT          0x74011890
2270 #define MTK_EP_RST_IN_OUT_OPT   0x00010001
2271 #define MTK_BT_RST_DONE         0x00000100
2272 #define MTK_BT_RESET_WAIT_MS    100
2273 #define MTK_BT_RESET_NUM_TRIES  10
2274
2275 static void btusb_mtk_wmt_recv(struct urb *urb)
2276 {
2277         struct hci_dev *hdev = urb->context;
2278         struct btusb_data *data = hci_get_drvdata(hdev);
2279         struct sk_buff *skb;
2280         int err;
2281
2282         if (urb->status == 0 && urb->actual_length > 0) {
2283                 hdev->stat.byte_rx += urb->actual_length;
2284
2285                 /* WMT event shouldn't be fragmented and the size should be
2286                  * less than HCI_WMT_MAX_EVENT_SIZE.
2287                  */
2288                 skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
2289                 if (!skb) {
2290                         hdev->stat.err_rx++;
2291                         kfree(urb->setup_packet);
2292                         return;
2293                 }
2294
2295                 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2296                 skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
2297
2298                 /* When someone waits for the WMT event, the skb is being cloned
2299                  * and being processed the events from there then.
2300                  */
2301                 if (test_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags)) {
2302                         data->evt_skb = skb_clone(skb, GFP_ATOMIC);
2303                         if (!data->evt_skb) {
2304                                 kfree_skb(skb);
2305                                 kfree(urb->setup_packet);
2306                                 return;
2307                         }
2308                 }
2309
2310                 err = hci_recv_frame(hdev, skb);
2311                 if (err < 0) {
2312                         kfree_skb(data->evt_skb);
2313                         data->evt_skb = NULL;
2314                         kfree(urb->setup_packet);
2315                         return;
2316                 }
2317
2318                 if (test_and_clear_bit(BTUSB_TX_WAIT_VND_EVT,
2319                                        &data->flags)) {
2320                         /* Barrier to sync with other CPUs */
2321                         smp_mb__after_atomic();
2322                         wake_up_bit(&data->flags,
2323                                     BTUSB_TX_WAIT_VND_EVT);
2324                 }
2325                 kfree(urb->setup_packet);
2326                 return;
2327         } else if (urb->status == -ENOENT) {
2328                 /* Avoid suspend failed when usb_kill_urb */
2329                 return;
2330         }
2331
2332         usb_mark_last_busy(data->udev);
2333
2334         /* The URB complete handler is still called with urb->actual_length = 0
2335          * when the event is not available, so we should keep re-submitting
2336          * URB until WMT event returns, Also, It's necessary to wait some time
2337          * between the two consecutive control URBs to relax the target device
2338          * to generate the event. Otherwise, the WMT event cannot return from
2339          * the device successfully.
2340          */
2341         udelay(500);
2342
2343         usb_anchor_urb(urb, &data->ctrl_anchor);
2344         err = usb_submit_urb(urb, GFP_ATOMIC);
2345         if (err < 0) {
2346                 kfree(urb->setup_packet);
2347                 /* -EPERM: urb is being killed;
2348                  * -ENODEV: device got disconnected
2349                  */
2350                 if (err != -EPERM && err != -ENODEV)
2351                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
2352                                    urb, -err);
2353                 usb_unanchor_urb(urb);
2354         }
2355 }
2356
2357 static int btusb_mtk_submit_wmt_recv_urb(struct hci_dev *hdev)
2358 {
2359         struct btusb_data *data = hci_get_drvdata(hdev);
2360         struct usb_ctrlrequest *dr;
2361         unsigned char *buf;
2362         int err, size = 64;
2363         unsigned int pipe;
2364         struct urb *urb;
2365
2366         urb = usb_alloc_urb(0, GFP_KERNEL);
2367         if (!urb)
2368                 return -ENOMEM;
2369
2370         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
2371         if (!dr) {
2372                 usb_free_urb(urb);
2373                 return -ENOMEM;
2374         }
2375
2376         dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
2377         dr->bRequest     = 1;
2378         dr->wIndex       = cpu_to_le16(0);
2379         dr->wValue       = cpu_to_le16(48);
2380         dr->wLength      = cpu_to_le16(size);
2381
2382         buf = kmalloc(size, GFP_KERNEL);
2383         if (!buf) {
2384                 kfree(dr);
2385                 usb_free_urb(urb);
2386                 return -ENOMEM;
2387         }
2388
2389         pipe = usb_rcvctrlpipe(data->udev, 0);
2390
2391         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
2392                              buf, size, btusb_mtk_wmt_recv, hdev);
2393
2394         urb->transfer_flags |= URB_FREE_BUFFER;
2395
2396         usb_anchor_urb(urb, &data->ctrl_anchor);
2397         err = usb_submit_urb(urb, GFP_KERNEL);
2398         if (err < 0) {
2399                 if (err != -EPERM && err != -ENODEV)
2400                         bt_dev_err(hdev, "urb %p submission failed (%d)",
2401                                    urb, -err);
2402                 usb_unanchor_urb(urb);
2403         }
2404
2405         usb_free_urb(urb);
2406
2407         return err;
2408 }
2409
2410 static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
2411                                   struct btmtk_hci_wmt_params *wmt_params)
2412 {
2413         struct btusb_data *data = hci_get_drvdata(hdev);
2414         struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
2415         u32 hlen, status = BTMTK_WMT_INVALID;
2416         struct btmtk_hci_wmt_evt *wmt_evt;
2417         struct btmtk_hci_wmt_cmd *wc;
2418         struct btmtk_wmt_hdr *hdr;
2419         int err;
2420
2421         /* Send the WMT command and wait until the WMT event returns */
2422         hlen = sizeof(*hdr) + wmt_params->dlen;
2423         if (hlen > 255)
2424                 return -EINVAL;
2425
2426         wc = kzalloc(hlen, GFP_KERNEL);
2427         if (!wc)
2428                 return -ENOMEM;
2429
2430         hdr = &wc->hdr;
2431         hdr->dir = 1;
2432         hdr->op = wmt_params->op;
2433         hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
2434         hdr->flag = wmt_params->flag;
2435         memcpy(wc->data, wmt_params->data, wmt_params->dlen);
2436
2437         set_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2438
2439         err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
2440
2441         if (err < 0) {
2442                 clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2443                 goto err_free_wc;
2444         }
2445
2446         /* Submit control IN URB on demand to process the WMT event */
2447         err = btusb_mtk_submit_wmt_recv_urb(hdev);
2448         if (err < 0)
2449                 goto err_free_wc;
2450
2451         /* The vendor specific WMT commands are all answered by a vendor
2452          * specific event and will have the Command Status or Command
2453          * Complete as with usual HCI command flow control.
2454          *
2455          * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
2456          * state to be cleared. The driver specific event receive routine
2457          * will clear that state and with that indicate completion of the
2458          * WMT command.
2459          */
2460         err = wait_on_bit_timeout(&data->flags, BTUSB_TX_WAIT_VND_EVT,
2461                                   TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
2462         if (err == -EINTR) {
2463                 bt_dev_err(hdev, "Execution of wmt command interrupted");
2464                 clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2465                 goto err_free_wc;
2466         }
2467
2468         if (err) {
2469                 bt_dev_err(hdev, "Execution of wmt command timed out");
2470                 clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2471                 err = -ETIMEDOUT;
2472                 goto err_free_wc;
2473         }
2474
2475         /* Parse and handle the return WMT event */
2476         wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
2477         if (wmt_evt->whdr.op != hdr->op) {
2478                 bt_dev_err(hdev, "Wrong op received %d expected %d",
2479                            wmt_evt->whdr.op, hdr->op);
2480                 err = -EIO;
2481                 goto err_free_skb;
2482         }
2483
2484         switch (wmt_evt->whdr.op) {
2485         case BTMTK_WMT_SEMAPHORE:
2486                 if (wmt_evt->whdr.flag == 2)
2487                         status = BTMTK_WMT_PATCH_UNDONE;
2488                 else
2489                         status = BTMTK_WMT_PATCH_DONE;
2490                 break;
2491         case BTMTK_WMT_FUNC_CTRL:
2492                 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
2493                 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
2494                         status = BTMTK_WMT_ON_DONE;
2495                 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
2496                         status = BTMTK_WMT_ON_PROGRESS;
2497                 else
2498                         status = BTMTK_WMT_ON_UNDONE;
2499                 break;
2500         case BTMTK_WMT_PATCH_DWNLD:
2501                 if (wmt_evt->whdr.flag == 2)
2502                         status = BTMTK_WMT_PATCH_DONE;
2503                 else if (wmt_evt->whdr.flag == 1)
2504                         status = BTMTK_WMT_PATCH_PROGRESS;
2505                 else
2506                         status = BTMTK_WMT_PATCH_UNDONE;
2507                 break;
2508         }
2509
2510         if (wmt_params->status)
2511                 *wmt_params->status = status;
2512
2513 err_free_skb:
2514         kfree_skb(data->evt_skb);
2515         data->evt_skb = NULL;
2516 err_free_wc:
2517         kfree(wc);
2518         return err;
2519 }
2520
2521 static int btusb_mtk_func_query(struct hci_dev *hdev)
2522 {
2523         struct btmtk_hci_wmt_params wmt_params;
2524         int status, err;
2525         u8 param = 0;
2526
2527         /* Query whether the function is enabled */
2528         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2529         wmt_params.flag = 4;
2530         wmt_params.dlen = sizeof(param);
2531         wmt_params.data = &param;
2532         wmt_params.status = &status;
2533
2534         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2535         if (err < 0) {
2536                 bt_dev_err(hdev, "Failed to query function status (%d)", err);
2537                 return err;
2538         }
2539
2540         return status;
2541 }
2542
2543 static int btusb_mtk_uhw_reg_write(struct btusb_data *data, u32 reg, u32 val)
2544 {
2545         struct hci_dev *hdev = data->hdev;
2546         int pipe, err;
2547         void *buf;
2548
2549         buf = kzalloc(4, GFP_KERNEL);
2550         if (!buf)
2551                 return -ENOMEM;
2552
2553         put_unaligned_le32(val, buf);
2554
2555         pipe = usb_sndctrlpipe(data->udev, 0);
2556         err = usb_control_msg(data->udev, pipe, 0x02,
2557                               0x5E,
2558                               reg >> 16, reg & 0xffff,
2559                               buf, 4, USB_CTRL_SET_TIMEOUT);
2560         if (err < 0) {
2561                 bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
2562                 goto err_free_buf;
2563         }
2564
2565 err_free_buf:
2566         kfree(buf);
2567
2568         return err;
2569 }
2570
2571 static int btusb_mtk_uhw_reg_read(struct btusb_data *data, u32 reg, u32 *val)
2572 {
2573         struct hci_dev *hdev = data->hdev;
2574         int pipe, err;
2575         void *buf;
2576
2577         buf = kzalloc(4, GFP_KERNEL);
2578         if (!buf)
2579                 return -ENOMEM;
2580
2581         pipe = usb_rcvctrlpipe(data->udev, 0);
2582         err = usb_control_msg(data->udev, pipe, 0x01,
2583                               0xDE,
2584                               reg >> 16, reg & 0xffff,
2585                               buf, 4, USB_CTRL_SET_TIMEOUT);
2586         if (err < 0) {
2587                 bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
2588                 goto err_free_buf;
2589         }
2590
2591         *val = get_unaligned_le32(buf);
2592         bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
2593
2594 err_free_buf:
2595         kfree(buf);
2596
2597         return err;
2598 }
2599
2600 static int btusb_mtk_reg_read(struct btusb_data *data, u32 reg, u32 *val)
2601 {
2602         int pipe, err, size = sizeof(u32);
2603         void *buf;
2604
2605         buf = kzalloc(size, GFP_KERNEL);
2606         if (!buf)
2607                 return -ENOMEM;
2608
2609         pipe = usb_rcvctrlpipe(data->udev, 0);
2610         err = usb_control_msg(data->udev, pipe, 0x63,
2611                               USB_TYPE_VENDOR | USB_DIR_IN,
2612                               reg >> 16, reg & 0xffff,
2613                               buf, size, USB_CTRL_SET_TIMEOUT);
2614         if (err < 0)
2615                 goto err_free_buf;
2616
2617         *val = get_unaligned_le32(buf);
2618
2619 err_free_buf:
2620         kfree(buf);
2621
2622         return err;
2623 }
2624
2625 static int btusb_mtk_id_get(struct btusb_data *data, u32 reg, u32 *id)
2626 {
2627         return btusb_mtk_reg_read(data, reg, id);
2628 }
2629
2630 static int btusb_mtk_setup(struct hci_dev *hdev)
2631 {
2632         struct btusb_data *data = hci_get_drvdata(hdev);
2633         struct btmtk_hci_wmt_params wmt_params;
2634         ktime_t calltime, delta, rettime;
2635         struct btmtk_tci_sleep tci_sleep;
2636         unsigned long long duration;
2637         struct sk_buff *skb;
2638         const char *fwname;
2639         int err, status;
2640         u32 dev_id;
2641         char fw_bin_name[64];
2642         u32 fw_version = 0;
2643         u8 param;
2644
2645         calltime = ktime_get();
2646
2647         err = btusb_mtk_id_get(data, 0x80000008, &dev_id);
2648         if (err < 0) {
2649                 bt_dev_err(hdev, "Failed to get device id (%d)", err);
2650                 return err;
2651         }
2652
2653         if (!dev_id) {
2654                 err = btusb_mtk_id_get(data, 0x70010200, &dev_id);
2655                 if (err < 0) {
2656                         bt_dev_err(hdev, "Failed to get device id (%d)", err);
2657                         return err;
2658                 }
2659                 err = btusb_mtk_id_get(data, 0x80021004, &fw_version);
2660                 if (err < 0) {
2661                         bt_dev_err(hdev, "Failed to get fw version (%d)", err);
2662                         return err;
2663                 }
2664         }
2665
2666         switch (dev_id) {
2667         case 0x7663:
2668                 fwname = FIRMWARE_MT7663;
2669                 break;
2670         case 0x7668:
2671                 fwname = FIRMWARE_MT7668;
2672                 break;
2673         case 0x7922:
2674         case 0x7961:
2675                 snprintf(fw_bin_name, sizeof(fw_bin_name),
2676                         "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
2677                          dev_id & 0xffff, (fw_version & 0xff) + 1);
2678                 err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
2679                                                 btusb_mtk_hci_wmt_sync);
2680                 if (err < 0) {
2681                         bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
2682                         return err;
2683                 }
2684
2685                 /* It's Device EndPoint Reset Option Register */
2686                 btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
2687
2688                 /* Enable Bluetooth protocol */
2689                 param = 1;
2690                 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2691                 wmt_params.flag = 0;
2692                 wmt_params.dlen = sizeof(param);
2693                 wmt_params.data = &param;
2694                 wmt_params.status = NULL;
2695
2696                 err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2697                 if (err < 0) {
2698                         bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
2699                         return err;
2700                 }
2701
2702                 hci_set_msft_opcode(hdev, 0xFD30);
2703                 hci_set_aosp_capable(hdev);
2704                 goto done;
2705         default:
2706                 bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
2707                            dev_id);
2708                 return -ENODEV;
2709         }
2710
2711         /* Query whether the firmware is already download */
2712         wmt_params.op = BTMTK_WMT_SEMAPHORE;
2713         wmt_params.flag = 1;
2714         wmt_params.dlen = 0;
2715         wmt_params.data = NULL;
2716         wmt_params.status = &status;
2717
2718         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2719         if (err < 0) {
2720                 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
2721                 return err;
2722         }
2723
2724         if (status == BTMTK_WMT_PATCH_DONE) {
2725                 bt_dev_info(hdev, "firmware already downloaded");
2726                 goto ignore_setup_fw;
2727         }
2728
2729         /* Setup a firmware which the device definitely requires */
2730         err = btmtk_setup_firmware(hdev, fwname,
2731                                    btusb_mtk_hci_wmt_sync);
2732         if (err < 0)
2733                 return err;
2734
2735 ignore_setup_fw:
2736         err = readx_poll_timeout(btusb_mtk_func_query, hdev, status,
2737                                  status < 0 || status != BTMTK_WMT_ON_PROGRESS,
2738                                  2000, 5000000);
2739         /* -ETIMEDOUT happens */
2740         if (err < 0)
2741                 return err;
2742
2743         /* The other errors happen in btusb_mtk_func_query */
2744         if (status < 0)
2745                 return status;
2746
2747         if (status == BTMTK_WMT_ON_DONE) {
2748                 bt_dev_info(hdev, "function already on");
2749                 goto ignore_func_on;
2750         }
2751
2752         /* Enable Bluetooth protocol */
2753         param = 1;
2754         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2755         wmt_params.flag = 0;
2756         wmt_params.dlen = sizeof(param);
2757         wmt_params.data = &param;
2758         wmt_params.status = NULL;
2759
2760         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2761         if (err < 0) {
2762                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
2763                 return err;
2764         }
2765
2766 ignore_func_on:
2767         /* Apply the low power environment setup */
2768         tci_sleep.mode = 0x5;
2769         tci_sleep.duration = cpu_to_le16(0x640);
2770         tci_sleep.host_duration = cpu_to_le16(0x640);
2771         tci_sleep.host_wakeup_pin = 0;
2772         tci_sleep.time_compensation = 0;
2773
2774         skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
2775                              HCI_INIT_TIMEOUT);
2776         if (IS_ERR(skb)) {
2777                 err = PTR_ERR(skb);
2778                 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
2779                 return err;
2780         }
2781         kfree_skb(skb);
2782
2783 done:
2784         rettime = ktime_get();
2785         delta = ktime_sub(rettime, calltime);
2786         duration = (unsigned long long)ktime_to_ns(delta) >> 10;
2787
2788         bt_dev_info(hdev, "Device setup in %llu usecs", duration);
2789
2790         return 0;
2791 }
2792
2793 static int btusb_mtk_shutdown(struct hci_dev *hdev)
2794 {
2795         struct btmtk_hci_wmt_params wmt_params;
2796         u8 param = 0;
2797         int err;
2798
2799         /* Disable the device */
2800         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2801         wmt_params.flag = 0;
2802         wmt_params.dlen = sizeof(param);
2803         wmt_params.data = &param;
2804         wmt_params.status = NULL;
2805
2806         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2807         if (err < 0) {
2808                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
2809                 return err;
2810         }
2811
2812         return 0;
2813 }
2814
2815 static void btusb_mtk_cmd_timeout(struct hci_dev *hdev)
2816 {
2817         struct btusb_data *data = hci_get_drvdata(hdev);
2818         u32 val;
2819         int err, retry = 0;
2820
2821         /* It's MediaTek specific bluetooth reset mechanism via USB */
2822         if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
2823                 bt_dev_err(hdev, "last reset failed? Not resetting again");
2824                 return;
2825         }
2826
2827         err = usb_autopm_get_interface(data->intf);
2828         if (err < 0)
2829                 return;
2830
2831         btusb_stop_traffic(data);
2832         usb_kill_anchored_urbs(&data->tx_anchor);
2833
2834         /* It's Device EndPoint Reset Option Register */
2835         bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
2836         btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
2837         btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val);
2838
2839         /* Reset the bluetooth chip via USB interface. */
2840         btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1);
2841         btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
2842         btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
2843         btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
2844         btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
2845         /* MT7921 need to delay 20ms between toggle reset bit */
2846         msleep(20);
2847         btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
2848         btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
2849
2850         /* Poll the register until reset is completed */
2851         do {
2852                 btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val);
2853                 if (val & MTK_BT_RST_DONE) {
2854                         bt_dev_dbg(hdev, "Bluetooth Reset Successfully");
2855                         break;
2856                 }
2857
2858                 bt_dev_dbg(hdev, "Polling Bluetooth Reset CR");
2859                 retry++;
2860                 msleep(MTK_BT_RESET_WAIT_MS);
2861         } while (retry < MTK_BT_RESET_NUM_TRIES);
2862
2863         btusb_mtk_id_get(data, 0x70010200, &val);
2864         if (!val)
2865                 bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
2866
2867         usb_queue_reset_device(data->intf);
2868
2869         clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags);
2870 }
2871
2872 static int btusb_recv_acl_mtk(struct hci_dev *hdev, struct sk_buff *skb)
2873 {
2874         struct btusb_data *data = hci_get_drvdata(hdev);
2875         u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
2876
2877         switch (handle) {
2878         case 0xfc6f:            /* Firmware dump from device */
2879                 /* When the firmware hangs, the device can no longer
2880                  * suspend and thus disable auto-suspend.
2881                  */
2882                 usb_disable_autosuspend(data->udev);
2883                 fallthrough;
2884         case 0x05ff:            /* Firmware debug logging 1 */
2885         case 0x05fe:            /* Firmware debug logging 2 */
2886                 return hci_recv_diag(hdev, skb);
2887         }
2888
2889         return hci_recv_frame(hdev, skb);
2890 }
2891
2892 #ifdef CONFIG_PM
2893 /* Configure an out-of-band gpio as wake-up pin, if specified in device tree */
2894 static int marvell_config_oob_wake(struct hci_dev *hdev)
2895 {
2896         struct sk_buff *skb;
2897         struct btusb_data *data = hci_get_drvdata(hdev);
2898         struct device *dev = &data->udev->dev;
2899         u16 pin, gap, opcode;
2900         int ret;
2901         u8 cmd[5];
2902
2903         /* Move on if no wakeup pin specified */
2904         if (of_property_read_u16(dev->of_node, "marvell,wakeup-pin", &pin) ||
2905             of_property_read_u16(dev->of_node, "marvell,wakeup-gap-ms", &gap))
2906                 return 0;
2907
2908         /* Vendor specific command to configure a GPIO as wake-up pin */
2909         opcode = hci_opcode_pack(0x3F, 0x59);
2910         cmd[0] = opcode & 0xFF;
2911         cmd[1] = opcode >> 8;
2912         cmd[2] = 2; /* length of parameters that follow */
2913         cmd[3] = pin;
2914         cmd[4] = gap; /* time in ms, for which wakeup pin should be asserted */
2915
2916         skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
2917         if (!skb) {
2918                 bt_dev_err(hdev, "%s: No memory", __func__);
2919                 return -ENOMEM;
2920         }
2921
2922         skb_put_data(skb, cmd, sizeof(cmd));
2923         hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
2924
2925         ret = btusb_send_frame(hdev, skb);
2926         if (ret) {
2927                 bt_dev_err(hdev, "%s: configuration failed", __func__);
2928                 kfree_skb(skb);
2929                 return ret;
2930         }
2931
2932         return 0;
2933 }
2934 #endif
2935
2936 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
2937                                     const bdaddr_t *bdaddr)
2938 {
2939         struct sk_buff *skb;
2940         u8 buf[8];
2941         long ret;
2942
2943         buf[0] = 0xfe;
2944         buf[1] = sizeof(bdaddr_t);
2945         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
2946
2947         skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2948         if (IS_ERR(skb)) {
2949                 ret = PTR_ERR(skb);
2950                 bt_dev_err(hdev, "changing Marvell device address failed (%ld)",
2951                            ret);
2952                 return ret;
2953         }
2954         kfree_skb(skb);
2955
2956         return 0;
2957 }
2958
2959 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
2960                                     const bdaddr_t *bdaddr)
2961 {
2962         struct sk_buff *skb;
2963         u8 buf[10];
2964         long ret;
2965
2966         buf[0] = 0x01;
2967         buf[1] = 0x01;
2968         buf[2] = 0x00;
2969         buf[3] = sizeof(bdaddr_t);
2970         memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
2971
2972         skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2973         if (IS_ERR(skb)) {
2974                 ret = PTR_ERR(skb);
2975                 bt_dev_err(hdev, "Change address command failed (%ld)", ret);
2976                 return ret;
2977         }
2978         kfree_skb(skb);
2979
2980         return 0;
2981 }
2982
2983 static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev,
2984                                 const bdaddr_t *bdaddr)
2985 {
2986         struct sk_buff *skb;
2987         u8 buf[6];
2988         long ret;
2989
2990         memcpy(buf, bdaddr, sizeof(bdaddr_t));
2991
2992         skb = __hci_cmd_sync_ev(hdev, 0xfc14, sizeof(buf), buf,
2993                                 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
2994         if (IS_ERR(skb)) {
2995                 ret = PTR_ERR(skb);
2996                 bt_dev_err(hdev, "Change address command failed (%ld)", ret);
2997                 return ret;
2998         }
2999         kfree_skb(skb);
3000
3001         return 0;
3002 }
3003
3004 #define QCA_DFU_PACKET_LEN      4096
3005
3006 #define QCA_GET_TARGET_VERSION  0x09
3007 #define QCA_CHECK_STATUS        0x05
3008 #define QCA_DFU_DOWNLOAD        0x01
3009
3010 #define QCA_SYSCFG_UPDATED      0x40
3011 #define QCA_PATCH_UPDATED       0x80
3012 #define QCA_DFU_TIMEOUT         3000
3013 #define QCA_FLAG_MULTI_NVM      0x80
3014 #define QCA_BT_RESET_WAIT_MS    100
3015
3016 #define WCN6855_2_0_RAM_VERSION_GF 0x400c1200
3017 #define WCN6855_2_1_RAM_VERSION_GF 0x400c1211
3018
3019 struct qca_version {
3020         __le32  rom_version;
3021         __le32  patch_version;
3022         __le32  ram_version;
3023         __u8    chip_id;
3024         __u8    platform_id;
3025         __le16  flag;
3026         __u8    reserved[4];
3027 } __packed;
3028
3029 struct qca_rampatch_version {
3030         __le16  rom_version_high;
3031         __le16  rom_version_low;
3032         __le16  patch_version;
3033 } __packed;
3034
3035 struct qca_device_info {
3036         u32     rom_version;
3037         u8      rampatch_hdr;   /* length of header in rampatch */
3038         u8      nvm_hdr;        /* length of header in NVM */
3039         u8      ver_offset;     /* offset of version structure in rampatch */
3040 };
3041
3042 static const struct qca_device_info qca_devices_table[] = {
3043         { 0x00000100, 20, 4,  8 }, /* Rome 1.0 */
3044         { 0x00000101, 20, 4,  8 }, /* Rome 1.1 */
3045         { 0x00000200, 28, 4, 16 }, /* Rome 2.0 */
3046         { 0x00000201, 28, 4, 16 }, /* Rome 2.1 */
3047         { 0x00000300, 28, 4, 16 }, /* Rome 3.0 */
3048         { 0x00000302, 28, 4, 16 }, /* Rome 3.2 */
3049         { 0x00130100, 40, 4, 16 }, /* WCN6855 1.0 */
3050         { 0x00130200, 40, 4, 16 }, /* WCN6855 2.0 */
3051         { 0x00130201, 40, 4, 16 }, /* WCN6855 2.1 */
3052         { 0x00190200, 40, 4, 16 }, /* WCN785x 2.0 */
3053 };
3054
3055 static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 request,
3056                                      void *data, u16 size)
3057 {
3058         int pipe, err;
3059         u8 *buf;
3060
3061         buf = kmalloc(size, GFP_KERNEL);
3062         if (!buf)
3063                 return -ENOMEM;
3064
3065         /* Found some of USB hosts have IOT issues with ours so that we should
3066          * not wait until HCI layer is ready.
3067          */
3068         pipe = usb_rcvctrlpipe(udev, 0);
3069         err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
3070                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3071         if (err < 0) {
3072                 dev_err(&udev->dev, "Failed to access otp area (%d)", err);
3073                 goto done;
3074         }
3075
3076         memcpy(data, buf, size);
3077
3078 done:
3079         kfree(buf);
3080
3081         return err;
3082 }
3083
3084 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
3085                                        const struct firmware *firmware,
3086                                        size_t hdr_size)
3087 {
3088         struct btusb_data *btdata = hci_get_drvdata(hdev);
3089         struct usb_device *udev = btdata->udev;
3090         size_t count, size, sent = 0;
3091         int pipe, len, err;
3092         u8 *buf;
3093
3094         buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
3095         if (!buf)
3096                 return -ENOMEM;
3097
3098         count = firmware->size;
3099
3100         size = min_t(size_t, count, hdr_size);
3101         memcpy(buf, firmware->data, size);
3102
3103         /* USB patches should go down to controller through USB path
3104          * because binary format fits to go down through USB channel.
3105          * USB control path is for patching headers and USB bulk is for
3106          * patch body.
3107          */
3108         pipe = usb_sndctrlpipe(udev, 0);
3109         err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
3110                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3111         if (err < 0) {
3112                 bt_dev_err(hdev, "Failed to send headers (%d)", err);
3113                 goto done;
3114         }
3115
3116         sent += size;
3117         count -= size;
3118
3119         /* ep2 need time to switch from function acl to function dfu,
3120          * so we add 20ms delay here.
3121          */
3122         msleep(20);
3123
3124         while (count) {
3125                 size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
3126
3127                 memcpy(buf, firmware->data + sent, size);
3128
3129                 pipe = usb_sndbulkpipe(udev, 0x02);
3130                 err = usb_bulk_msg(udev, pipe, buf, size, &len,
3131                                    QCA_DFU_TIMEOUT);
3132                 if (err < 0) {
3133                         bt_dev_err(hdev, "Failed to send body at %zd of %zd (%d)",
3134                                    sent, firmware->size, err);
3135                         break;
3136                 }
3137
3138                 if (size != len) {
3139                         bt_dev_err(hdev, "Failed to get bulk buffer");
3140                         err = -EILSEQ;
3141                         break;
3142                 }
3143
3144                 sent  += size;
3145                 count -= size;
3146         }
3147
3148 done:
3149         kfree(buf);
3150         return err;
3151 }
3152
3153 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
3154                                          struct qca_version *ver,
3155                                          const struct qca_device_info *info)
3156 {
3157         struct qca_rampatch_version *rver;
3158         const struct firmware *fw;
3159         u32 ver_rom, ver_patch, rver_rom;
3160         u16 rver_rom_low, rver_rom_high, rver_patch;
3161         char fwname[64];
3162         int err;
3163
3164         ver_rom = le32_to_cpu(ver->rom_version);
3165         ver_patch = le32_to_cpu(ver->patch_version);
3166
3167         snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
3168
3169         err = request_firmware(&fw, fwname, &hdev->dev);
3170         if (err) {
3171                 bt_dev_err(hdev, "failed to request rampatch file: %s (%d)",
3172                            fwname, err);
3173                 return err;
3174         }
3175
3176         bt_dev_info(hdev, "using rampatch file: %s", fwname);
3177
3178         rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
3179         rver_rom_low = le16_to_cpu(rver->rom_version_low);
3180         rver_patch = le16_to_cpu(rver->patch_version);
3181
3182         if (ver_rom & ~0xffffU) {
3183                 rver_rom_high = le16_to_cpu(rver->rom_version_high);
3184                 rver_rom = le32_to_cpu(rver_rom_high << 16 | rver_rom_low);
3185         } else {
3186                 rver_rom = rver_rom_low;
3187         }
3188
3189         bt_dev_info(hdev, "QCA: patch rome 0x%x build 0x%x, "
3190                     "firmware rome 0x%x build 0x%x",
3191                     rver_rom, rver_patch, ver_rom, ver_patch);
3192
3193         if (rver_rom != ver_rom || rver_patch <= ver_patch) {
3194                 bt_dev_err(hdev, "rampatch file version did not match with firmware");
3195                 err = -EINVAL;
3196                 goto done;
3197         }
3198
3199         err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
3200
3201 done:
3202         release_firmware(fw);
3203
3204         return err;
3205 }
3206
3207 static void btusb_generate_qca_nvm_name(char *fwname, size_t max_size,
3208                                         const struct qca_version *ver)
3209 {
3210         u32 rom_version = le32_to_cpu(ver->rom_version);
3211         u16 flag = le16_to_cpu(ver->flag);
3212
3213         if (((flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) {
3214                 /* The board_id should be split into two bytes
3215                  * The 1st byte is chip ID, and the 2nd byte is platform ID
3216                  * For example, board ID 0x010A, 0x01 is platform ID. 0x0A is chip ID
3217                  * we have several platforms, and platform IDs are continuously added
3218                  * Platform ID:
3219                  * 0x00 is for Mobile
3220                  * 0x01 is for X86
3221                  * 0x02 is for Automotive
3222                  * 0x03 is for Consumer electronic
3223                  */
3224                 u16 board_id = (ver->chip_id << 8) + ver->platform_id;
3225                 const char *variant;
3226
3227                 switch (le32_to_cpu(ver->ram_version)) {
3228                 case WCN6855_2_0_RAM_VERSION_GF:
3229                 case WCN6855_2_1_RAM_VERSION_GF:
3230                         variant = "_gf";
3231                         break;
3232                 default:
3233                         variant = "";
3234                         break;
3235                 }
3236
3237                 if (board_id == 0) {
3238                         snprintf(fwname, max_size, "qca/nvm_usb_%08x%s.bin",
3239                                 rom_version, variant);
3240                 } else {
3241                         snprintf(fwname, max_size, "qca/nvm_usb_%08x%s_%04x.bin",
3242                                 rom_version, variant, board_id);
3243                 }
3244         } else {
3245                 snprintf(fwname, max_size, "qca/nvm_usb_%08x.bin",
3246                         rom_version);
3247         }
3248
3249 }
3250
3251 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
3252                                     struct qca_version *ver,
3253                                     const struct qca_device_info *info)
3254 {
3255         const struct firmware *fw;
3256         char fwname[64];
3257         int err;
3258
3259         btusb_generate_qca_nvm_name(fwname, sizeof(fwname), ver);
3260
3261         err = request_firmware(&fw, fwname, &hdev->dev);
3262         if (err) {
3263                 bt_dev_err(hdev, "failed to request NVM file: %s (%d)",
3264                            fwname, err);
3265                 return err;
3266         }
3267
3268         bt_dev_info(hdev, "using NVM file: %s", fwname);
3269
3270         err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
3271
3272         release_firmware(fw);
3273
3274         return err;
3275 }
3276
3277 /* identify the ROM version and check whether patches are needed */
3278 static bool btusb_qca_need_patch(struct usb_device *udev)
3279 {
3280         struct qca_version ver;
3281
3282         if (btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3283                                       sizeof(ver)) < 0)
3284                 return false;
3285         /* only low ROM versions need patches */
3286         return !(le32_to_cpu(ver.rom_version) & ~0xffffU);
3287 }
3288
3289 static int btusb_setup_qca(struct hci_dev *hdev)
3290 {
3291         struct btusb_data *btdata = hci_get_drvdata(hdev);
3292         struct usb_device *udev = btdata->udev;
3293         const struct qca_device_info *info = NULL;
3294         struct qca_version ver;
3295         u32 ver_rom;
3296         u8 status;
3297         int i, err;
3298
3299         err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3300                                         sizeof(ver));
3301         if (err < 0)
3302                 return err;
3303
3304         ver_rom = le32_to_cpu(ver.rom_version);
3305
3306         for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
3307                 if (ver_rom == qca_devices_table[i].rom_version)
3308                         info = &qca_devices_table[i];
3309         }
3310         if (!info) {
3311                 /* If the rom_version is not matched in the qca_devices_table
3312                  * and the high ROM version is not zero, we assume this chip no
3313                  * need to load the rampatch and nvm.
3314                  */
3315                 if (ver_rom & ~0xffffU)
3316                         return 0;
3317
3318                 bt_dev_err(hdev, "don't support firmware rome 0x%x", ver_rom);
3319                 return -ENODEV;
3320         }
3321
3322         err = btusb_qca_send_vendor_req(udev, QCA_CHECK_STATUS, &status,
3323                                         sizeof(status));
3324         if (err < 0)
3325                 return err;
3326
3327         if (!(status & QCA_PATCH_UPDATED)) {
3328                 err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
3329                 if (err < 0)
3330                         return err;
3331         }
3332
3333         err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3334                                         sizeof(ver));
3335         if (err < 0)
3336                 return err;
3337
3338         if (!(status & QCA_SYSCFG_UPDATED)) {
3339                 err = btusb_setup_qca_load_nvm(hdev, &ver, info);
3340                 if (err < 0)
3341                         return err;
3342
3343                 /* WCN6855 2.1 and later will reset to apply firmware downloaded here, so
3344                  * wait ~100ms for reset Done then go ahead, otherwise, it maybe
3345                  * cause potential enable failure.
3346                  */
3347                 if (info->rom_version >= 0x00130201)
3348                         msleep(QCA_BT_RESET_WAIT_MS);
3349         }
3350
3351         /* Mark HCI_OP_ENHANCED_SETUP_SYNC_CONN as broken as it doesn't seem to
3352          * work with the likes of HSP/HFP mSBC.
3353          */
3354         set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &hdev->quirks);
3355         set_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks);
3356
3357         return 0;
3358 }
3359
3360 static inline int __set_diag_interface(struct hci_dev *hdev)
3361 {
3362         struct btusb_data *data = hci_get_drvdata(hdev);
3363         struct usb_interface *intf = data->diag;
3364         int i;
3365
3366         if (!data->diag)
3367                 return -ENODEV;
3368
3369         data->diag_tx_ep = NULL;
3370         data->diag_rx_ep = NULL;
3371
3372         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3373                 struct usb_endpoint_descriptor *ep_desc;
3374
3375                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3376
3377                 if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3378                         data->diag_tx_ep = ep_desc;
3379                         continue;
3380                 }
3381
3382                 if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3383                         data->diag_rx_ep = ep_desc;
3384                         continue;
3385                 }
3386         }
3387
3388         if (!data->diag_tx_ep || !data->diag_rx_ep) {
3389                 bt_dev_err(hdev, "invalid diagnostic descriptors");
3390                 return -ENODEV;
3391         }
3392
3393         return 0;
3394 }
3395
3396 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
3397 {
3398         struct btusb_data *data = hci_get_drvdata(hdev);
3399         struct sk_buff *skb;
3400         struct urb *urb;
3401         unsigned int pipe;
3402
3403         if (!data->diag_tx_ep)
3404                 return ERR_PTR(-ENODEV);
3405
3406         urb = usb_alloc_urb(0, GFP_KERNEL);
3407         if (!urb)
3408                 return ERR_PTR(-ENOMEM);
3409
3410         skb = bt_skb_alloc(2, GFP_KERNEL);
3411         if (!skb) {
3412                 usb_free_urb(urb);
3413                 return ERR_PTR(-ENOMEM);
3414         }
3415
3416         skb_put_u8(skb, 0xf0);
3417         skb_put_u8(skb, enable);
3418
3419         pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
3420
3421         usb_fill_bulk_urb(urb, data->udev, pipe,
3422                           skb->data, skb->len, btusb_tx_complete, skb);
3423
3424         skb->dev = (void *)hdev;
3425
3426         return urb;
3427 }
3428
3429 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
3430 {
3431         struct btusb_data *data = hci_get_drvdata(hdev);
3432         struct urb *urb;
3433
3434         if (!data->diag)
3435                 return -ENODEV;
3436
3437         if (!test_bit(HCI_RUNNING, &hdev->flags))
3438                 return -ENETDOWN;
3439
3440         urb = alloc_diag_urb(hdev, enable);
3441         if (IS_ERR(urb))
3442                 return PTR_ERR(urb);
3443
3444         return submit_or_queue_tx_urb(hdev, urb);
3445 }
3446
3447 #ifdef CONFIG_PM
3448 static irqreturn_t btusb_oob_wake_handler(int irq, void *priv)
3449 {
3450         struct btusb_data *data = priv;
3451
3452         pm_wakeup_event(&data->udev->dev, 0);
3453         pm_system_wakeup();
3454
3455         /* Disable only if not already disabled (keep it balanced) */
3456         if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
3457                 disable_irq_nosync(irq);
3458                 disable_irq_wake(irq);
3459         }
3460         return IRQ_HANDLED;
3461 }
3462
3463 static const struct of_device_id btusb_match_table[] = {
3464         { .compatible = "usb1286,204e" },
3465         { .compatible = "usbcf3,e300" }, /* QCA6174A */
3466         { .compatible = "usb4ca,301a" }, /* QCA6174A (Lite-On) */
3467         { }
3468 };
3469 MODULE_DEVICE_TABLE(of, btusb_match_table);
3470
3471 /* Use an oob wakeup pin? */
3472 static int btusb_config_oob_wake(struct hci_dev *hdev)
3473 {
3474         struct btusb_data *data = hci_get_drvdata(hdev);
3475         struct device *dev = &data->udev->dev;
3476         int irq, ret;
3477
3478         clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
3479
3480         if (!of_match_device(btusb_match_table, dev))
3481                 return 0;
3482
3483         /* Move on if no IRQ specified */
3484         irq = of_irq_get_byname(dev->of_node, "wakeup");
3485         if (irq <= 0) {
3486                 bt_dev_dbg(hdev, "%s: no OOB Wakeup IRQ in DT", __func__);
3487                 return 0;
3488         }
3489
3490         irq_set_status_flags(irq, IRQ_NOAUTOEN);
3491         ret = devm_request_irq(&hdev->dev, irq, btusb_oob_wake_handler,
3492                                0, "OOB Wake-on-BT", data);
3493         if (ret) {
3494                 bt_dev_err(hdev, "%s: IRQ request failed", __func__);
3495                 return ret;
3496         }
3497
3498         ret = device_init_wakeup(dev, true);
3499         if (ret) {
3500                 bt_dev_err(hdev, "%s: failed to init_wakeup", __func__);
3501                 return ret;
3502         }
3503
3504         data->oob_wake_irq = irq;
3505         bt_dev_info(hdev, "OOB Wake-on-BT configured at IRQ %u", irq);
3506         return 0;
3507 }
3508 #endif
3509
3510 static void btusb_check_needs_reset_resume(struct usb_interface *intf)
3511 {
3512         if (dmi_check_system(btusb_needs_reset_resume_table))
3513                 interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
3514 }
3515
3516 static bool btusb_wakeup(struct hci_dev *hdev)
3517 {
3518         struct btusb_data *data = hci_get_drvdata(hdev);
3519
3520         return device_may_wakeup(&data->udev->dev);
3521 }
3522
3523 static int btusb_shutdown_qca(struct hci_dev *hdev)
3524 {
3525         struct sk_buff *skb;
3526
3527         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
3528         if (IS_ERR(skb)) {
3529                 bt_dev_err(hdev, "HCI reset during shutdown failed");
3530                 return PTR_ERR(skb);
3531         }
3532         kfree_skb(skb);
3533
3534         return 0;
3535 }
3536
3537 static ssize_t force_poll_sync_read(struct file *file, char __user *user_buf,
3538                                     size_t count, loff_t *ppos)
3539 {
3540         struct btusb_data *data = file->private_data;
3541         char buf[3];
3542
3543         buf[0] = data->poll_sync ? 'Y' : 'N';
3544         buf[1] = '\n';
3545         buf[2] = '\0';
3546         return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
3547 }
3548
3549 static ssize_t force_poll_sync_write(struct file *file,
3550                                      const char __user *user_buf,
3551                                      size_t count, loff_t *ppos)
3552 {
3553         struct btusb_data *data = file->private_data;
3554         bool enable;
3555         int err;
3556
3557         err = kstrtobool_from_user(user_buf, count, &enable);
3558         if (err)
3559                 return err;
3560
3561         /* Only allow changes while the adapter is down */
3562         if (test_bit(HCI_UP, &data->hdev->flags))
3563                 return -EPERM;
3564
3565         if (data->poll_sync == enable)
3566                 return -EALREADY;
3567
3568         data->poll_sync = enable;
3569
3570         return count;
3571 }
3572
3573 static const struct file_operations force_poll_sync_fops = {
3574         .open           = simple_open,
3575         .read           = force_poll_sync_read,
3576         .write          = force_poll_sync_write,
3577         .llseek         = default_llseek,
3578 };
3579
3580 static int btusb_probe(struct usb_interface *intf,
3581                        const struct usb_device_id *id)
3582 {
3583         struct usb_endpoint_descriptor *ep_desc;
3584         struct gpio_desc *reset_gpio;
3585         struct btusb_data *data;
3586         struct hci_dev *hdev;
3587         unsigned ifnum_base;
3588         int i, err, priv_size;
3589
3590         BT_DBG("intf %p id %p", intf, id);
3591
3592         /* interface numbers are hardcoded in the spec */
3593         if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
3594                 if (!(id->driver_info & BTUSB_IFNUM_2))
3595                         return -ENODEV;
3596                 if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
3597                         return -ENODEV;
3598         }
3599
3600         ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
3601
3602         if (!id->driver_info) {
3603                 const struct usb_device_id *match;
3604
3605                 match = usb_match_id(intf, blacklist_table);
3606                 if (match)
3607                         id = match;
3608         }
3609
3610         if (id->driver_info == BTUSB_IGNORE)
3611                 return -ENODEV;
3612
3613         if (id->driver_info & BTUSB_ATH3012) {
3614                 struct usb_device *udev = interface_to_usbdev(intf);
3615
3616                 /* Old firmware would otherwise let ath3k driver load
3617                  * patch and sysconfig files
3618                  */
3619                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001 &&
3620                     !btusb_qca_need_patch(udev))
3621                         return -ENODEV;
3622         }
3623
3624         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
3625         if (!data)
3626                 return -ENOMEM;
3627
3628         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3629                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3630
3631                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
3632                         data->intr_ep = ep_desc;
3633                         continue;
3634                 }
3635
3636                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3637                         data->bulk_tx_ep = ep_desc;
3638                         continue;
3639                 }
3640
3641                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3642                         data->bulk_rx_ep = ep_desc;
3643                         continue;
3644                 }
3645         }
3646
3647         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
3648                 return -ENODEV;
3649
3650         if (id->driver_info & BTUSB_AMP) {
3651                 data->cmdreq_type = USB_TYPE_CLASS | 0x01;
3652                 data->cmdreq = 0x2b;
3653         } else {
3654                 data->cmdreq_type = USB_TYPE_CLASS;
3655                 data->cmdreq = 0x00;
3656         }
3657
3658         data->udev = interface_to_usbdev(intf);
3659         data->intf = intf;
3660
3661         INIT_WORK(&data->work, btusb_work);
3662         INIT_WORK(&data->waker, btusb_waker);
3663         INIT_DELAYED_WORK(&data->rx_work, btusb_rx_work);
3664
3665         skb_queue_head_init(&data->acl_q);
3666
3667         init_usb_anchor(&data->deferred);
3668         init_usb_anchor(&data->tx_anchor);
3669         spin_lock_init(&data->txlock);
3670
3671         init_usb_anchor(&data->intr_anchor);
3672         init_usb_anchor(&data->bulk_anchor);
3673         init_usb_anchor(&data->isoc_anchor);
3674         init_usb_anchor(&data->diag_anchor);
3675         init_usb_anchor(&data->ctrl_anchor);
3676         spin_lock_init(&data->rxlock);
3677
3678         priv_size = 0;
3679
3680         data->recv_event = hci_recv_frame;
3681         data->recv_bulk = btusb_recv_bulk;
3682
3683         if (id->driver_info & BTUSB_INTEL_COMBINED) {
3684                 /* Allocate extra space for Intel device */
3685                 priv_size += sizeof(struct btintel_data);
3686
3687                 /* Override the rx handlers */
3688                 data->recv_event = btusb_recv_event_intel;
3689                 data->recv_bulk = btusb_recv_bulk_intel;
3690         }
3691
3692         data->recv_acl = hci_recv_frame;
3693
3694         hdev = hci_alloc_dev_priv(priv_size);
3695         if (!hdev)
3696                 return -ENOMEM;
3697
3698         hdev->bus = HCI_USB;
3699         hci_set_drvdata(hdev, data);
3700
3701         if (id->driver_info & BTUSB_AMP)
3702                 hdev->dev_type = HCI_AMP;
3703         else
3704                 hdev->dev_type = HCI_PRIMARY;
3705
3706         data->hdev = hdev;
3707
3708         SET_HCIDEV_DEV(hdev, &intf->dev);
3709
3710         reset_gpio = gpiod_get_optional(&data->udev->dev, "reset",
3711                                         GPIOD_OUT_LOW);
3712         if (IS_ERR(reset_gpio)) {
3713                 err = PTR_ERR(reset_gpio);
3714                 goto out_free_dev;
3715         } else if (reset_gpio) {
3716                 data->reset_gpio = reset_gpio;
3717         }
3718
3719         hdev->open   = btusb_open;
3720         hdev->close  = btusb_close;
3721         hdev->flush  = btusb_flush;
3722         hdev->send   = btusb_send_frame;
3723         hdev->notify = btusb_notify;
3724         hdev->wakeup = btusb_wakeup;
3725
3726 #ifdef CONFIG_PM
3727         err = btusb_config_oob_wake(hdev);
3728         if (err)
3729                 goto out_free_dev;
3730
3731         /* Marvell devices may need a specific chip configuration */
3732         if (id->driver_info & BTUSB_MARVELL && data->oob_wake_irq) {
3733                 err = marvell_config_oob_wake(hdev);
3734                 if (err)
3735                         goto out_free_dev;
3736         }
3737 #endif
3738         if (id->driver_info & BTUSB_CW6622)
3739                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
3740
3741         if (id->driver_info & BTUSB_BCM2045)
3742                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
3743
3744         if (id->driver_info & BTUSB_BCM92035)
3745                 hdev->setup = btusb_setup_bcm92035;
3746
3747         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
3748             (id->driver_info & BTUSB_BCM_PATCHRAM)) {
3749                 hdev->manufacturer = 15;
3750                 hdev->setup = btbcm_setup_patchram;
3751                 hdev->set_diag = btusb_bcm_set_diag;
3752                 hdev->set_bdaddr = btbcm_set_bdaddr;
3753
3754                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
3755                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
3756         }
3757
3758         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
3759             (id->driver_info & BTUSB_BCM_APPLE)) {
3760                 hdev->manufacturer = 15;
3761                 hdev->setup = btbcm_setup_apple;
3762                 hdev->set_diag = btusb_bcm_set_diag;
3763
3764                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
3765                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
3766         }
3767
3768         /* Combined Intel Device setup to support multiple setup routine */
3769         if (id->driver_info & BTUSB_INTEL_COMBINED) {
3770                 err = btintel_configure_setup(hdev);
3771                 if (err)
3772                         goto out_free_dev;
3773
3774                 /* Transport specific configuration */
3775                 hdev->send = btusb_send_frame_intel;
3776                 hdev->cmd_timeout = btusb_intel_cmd_timeout;
3777
3778                 if (id->driver_info & BTUSB_INTEL_NO_WBS_SUPPORT)
3779                         btintel_set_flag(hdev, INTEL_ROM_LEGACY_NO_WBS_SUPPORT);
3780
3781                 if (id->driver_info & BTUSB_INTEL_BROKEN_INITIAL_NCMD)
3782                         btintel_set_flag(hdev, INTEL_BROKEN_INITIAL_NCMD);
3783
3784                 if (id->driver_info & BTUSB_INTEL_BROKEN_SHUTDOWN_LED)
3785                         btintel_set_flag(hdev, INTEL_BROKEN_SHUTDOWN_LED);
3786         }
3787
3788         if (id->driver_info & BTUSB_MARVELL)
3789                 hdev->set_bdaddr = btusb_set_bdaddr_marvell;
3790
3791         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK) &&
3792             (id->driver_info & BTUSB_MEDIATEK)) {
3793                 hdev->setup = btusb_mtk_setup;
3794                 hdev->shutdown = btusb_mtk_shutdown;
3795                 hdev->manufacturer = 70;
3796                 hdev->cmd_timeout = btusb_mtk_cmd_timeout;
3797                 hdev->set_bdaddr = btmtk_set_bdaddr;
3798                 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
3799                 data->recv_acl = btusb_recv_acl_mtk;
3800         }
3801
3802         if (id->driver_info & BTUSB_SWAVE) {
3803                 set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
3804                 set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
3805         }
3806
3807         if (id->driver_info & BTUSB_INTEL_BOOT) {
3808                 hdev->manufacturer = 2;
3809                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
3810         }
3811
3812         if (id->driver_info & BTUSB_ATH3012) {
3813                 data->setup_on_usb = btusb_setup_qca;
3814                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
3815                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3816                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
3817         }
3818
3819         if (id->driver_info & BTUSB_QCA_ROME) {
3820                 data->setup_on_usb = btusb_setup_qca;
3821                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
3822                 hdev->cmd_timeout = btusb_qca_cmd_timeout;
3823                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3824                 btusb_check_needs_reset_resume(intf);
3825         }
3826
3827         if (id->driver_info & BTUSB_QCA_WCN6855) {
3828                 data->setup_on_usb = btusb_setup_qca;
3829                 hdev->shutdown = btusb_shutdown_qca;
3830                 hdev->set_bdaddr = btusb_set_bdaddr_wcn6855;
3831                 hdev->cmd_timeout = btusb_qca_cmd_timeout;
3832                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3833                 hci_set_msft_opcode(hdev, 0xFD70);
3834         }
3835
3836         if (id->driver_info & BTUSB_AMP) {
3837                 /* AMP controllers do not support SCO packets */
3838                 data->isoc = NULL;
3839         } else {
3840                 /* Interface orders are hardcoded in the specification */
3841                 data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
3842                 data->isoc_ifnum = ifnum_base + 1;
3843         }
3844
3845         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
3846             (id->driver_info & BTUSB_REALTEK)) {
3847                 hdev->setup = btrtl_setup_realtek;
3848                 hdev->shutdown = btrtl_shutdown_realtek;
3849                 hdev->cmd_timeout = btusb_rtl_cmd_timeout;
3850
3851                 /* Realtek devices need to set remote wakeup on auto-suspend */
3852                 set_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags);
3853                 set_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags);
3854         }
3855
3856         if (!reset)
3857                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3858
3859         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
3860                 if (!disable_scofix)
3861                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
3862         }
3863
3864         if (id->driver_info & BTUSB_BROKEN_ISOC)
3865                 data->isoc = NULL;
3866
3867         if (id->driver_info & BTUSB_WIDEBAND_SPEECH)
3868                 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
3869
3870         if (id->driver_info & BTUSB_VALID_LE_STATES)
3871                 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
3872
3873         if (id->driver_info & BTUSB_DIGIANSWER) {
3874                 data->cmdreq_type = USB_TYPE_VENDOR;
3875                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3876         }
3877
3878         if (id->driver_info & BTUSB_CSR) {
3879                 struct usb_device *udev = data->udev;
3880                 u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
3881
3882                 /* Old firmware would otherwise execute USB reset */
3883                 if (bcdDevice < 0x117)
3884                         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3885
3886                 /* This must be set first in case we disable it for fakes */
3887                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3888
3889                 /* Fake CSR devices with broken commands */
3890                 if (le16_to_cpu(udev->descriptor.idVendor)  == 0x0a12 &&
3891                     le16_to_cpu(udev->descriptor.idProduct) == 0x0001)
3892                         hdev->setup = btusb_setup_csr;
3893         }
3894
3895         if (id->driver_info & BTUSB_SNIFFER) {
3896                 struct usb_device *udev = data->udev;
3897
3898                 /* New sniffer firmware has crippled HCI interface */
3899                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
3900                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
3901         }
3902
3903         if (id->driver_info & BTUSB_INTEL_BOOT) {
3904                 /* A bug in the bootloader causes that interrupt interface is
3905                  * only enabled after receiving SetInterface(0, AltSetting=0).
3906                  */
3907                 err = usb_set_interface(data->udev, 0, 0);
3908                 if (err < 0) {
3909                         BT_ERR("failed to set interface 0, alt 0 %d", err);
3910                         goto out_free_dev;
3911                 }
3912         }
3913
3914         if (data->isoc) {
3915                 err = usb_driver_claim_interface(&btusb_driver,
3916                                                  data->isoc, data);
3917                 if (err < 0)
3918                         goto out_free_dev;
3919         }
3920
3921         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) && data->diag) {
3922                 if (!usb_driver_claim_interface(&btusb_driver,
3923                                                 data->diag, data))
3924                         __set_diag_interface(hdev);
3925                 else
3926                         data->diag = NULL;
3927         }
3928
3929         if (enable_autosuspend)
3930                 usb_enable_autosuspend(data->udev);
3931
3932         err = hci_register_dev(hdev);
3933         if (err < 0)
3934                 goto out_free_dev;
3935
3936         usb_set_intfdata(intf, data);
3937
3938         debugfs_create_file("force_poll_sync", 0644, hdev->debugfs, data,
3939                             &force_poll_sync_fops);
3940
3941         return 0;
3942
3943 out_free_dev:
3944         if (data->reset_gpio)
3945                 gpiod_put(data->reset_gpio);
3946         hci_free_dev(hdev);
3947         return err;
3948 }
3949
3950 static void btusb_disconnect(struct usb_interface *intf)
3951 {
3952         struct btusb_data *data = usb_get_intfdata(intf);
3953         struct hci_dev *hdev;
3954
3955         BT_DBG("intf %p", intf);
3956
3957         if (!data)
3958                 return;
3959
3960         hdev = data->hdev;
3961         usb_set_intfdata(data->intf, NULL);
3962
3963         if (data->isoc)
3964                 usb_set_intfdata(data->isoc, NULL);
3965
3966         if (data->diag)
3967                 usb_set_intfdata(data->diag, NULL);
3968
3969         hci_unregister_dev(hdev);
3970
3971         if (intf == data->intf) {
3972                 if (data->isoc)
3973                         usb_driver_release_interface(&btusb_driver, data->isoc);
3974                 if (data->diag)
3975                         usb_driver_release_interface(&btusb_driver, data->diag);
3976         } else if (intf == data->isoc) {
3977                 if (data->diag)
3978                         usb_driver_release_interface(&btusb_driver, data->diag);
3979                 usb_driver_release_interface(&btusb_driver, data->intf);
3980         } else if (intf == data->diag) {
3981                 usb_driver_release_interface(&btusb_driver, data->intf);
3982                 if (data->isoc)
3983                         usb_driver_release_interface(&btusb_driver, data->isoc);
3984         }
3985
3986         if (data->oob_wake_irq)
3987                 device_init_wakeup(&data->udev->dev, false);
3988
3989         if (data->reset_gpio)
3990                 gpiod_put(data->reset_gpio);
3991
3992         hci_free_dev(hdev);
3993 }
3994
3995 #ifdef CONFIG_PM
3996 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
3997 {
3998         struct btusb_data *data = usb_get_intfdata(intf);
3999
4000         BT_DBG("intf %p", intf);
4001
4002         if (data->suspend_count++)
4003                 return 0;
4004
4005         spin_lock_irq(&data->txlock);
4006         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
4007                 set_bit(BTUSB_SUSPENDING, &data->flags);
4008                 spin_unlock_irq(&data->txlock);
4009         } else {
4010                 spin_unlock_irq(&data->txlock);
4011                 data->suspend_count--;
4012                 return -EBUSY;
4013         }
4014
4015         cancel_work_sync(&data->work);
4016
4017         btusb_stop_traffic(data);
4018         usb_kill_anchored_urbs(&data->tx_anchor);
4019
4020         if (data->oob_wake_irq && device_may_wakeup(&data->udev->dev)) {
4021                 set_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
4022                 enable_irq_wake(data->oob_wake_irq);
4023                 enable_irq(data->oob_wake_irq);
4024         }
4025
4026         /* For global suspend, Realtek devices lose the loaded fw
4027          * in them. But for autosuspend, firmware should remain.
4028          * Actually, it depends on whether the usb host sends
4029          * set feature (enable wakeup) or not.
4030          */
4031         if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags)) {
4032                 if (PMSG_IS_AUTO(message) &&
4033                     device_can_wakeup(&data->udev->dev))
4034                         data->udev->do_remote_wakeup = 1;
4035                 else if (!PMSG_IS_AUTO(message) &&
4036                          !device_may_wakeup(&data->udev->dev)) {
4037                         data->udev->do_remote_wakeup = 0;
4038                         data->udev->reset_resume = 1;
4039                 }
4040         }
4041
4042         return 0;
4043 }
4044
4045 static void play_deferred(struct btusb_data *data)
4046 {
4047         struct urb *urb;
4048         int err;
4049
4050         while ((urb = usb_get_from_anchor(&data->deferred))) {
4051                 usb_anchor_urb(urb, &data->tx_anchor);
4052
4053                 err = usb_submit_urb(urb, GFP_ATOMIC);
4054                 if (err < 0) {
4055                         if (err != -EPERM && err != -ENODEV)
4056                                 BT_ERR("%s urb %p submission failed (%d)",
4057                                        data->hdev->name, urb, -err);
4058                         kfree(urb->setup_packet);
4059                         usb_unanchor_urb(urb);
4060                         usb_free_urb(urb);
4061                         break;
4062                 }
4063
4064                 data->tx_in_flight++;
4065                 usb_free_urb(urb);
4066         }
4067
4068         /* Cleanup the rest deferred urbs. */
4069         while ((urb = usb_get_from_anchor(&data->deferred))) {
4070                 kfree(urb->setup_packet);
4071                 usb_free_urb(urb);
4072         }
4073 }
4074
4075 static int btusb_resume(struct usb_interface *intf)
4076 {
4077         struct btusb_data *data = usb_get_intfdata(intf);
4078         struct hci_dev *hdev = data->hdev;
4079         int err = 0;
4080
4081         BT_DBG("intf %p", intf);
4082
4083         if (--data->suspend_count)
4084                 return 0;
4085
4086         /* Disable only if not already disabled (keep it balanced) */
4087         if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
4088                 disable_irq(data->oob_wake_irq);
4089                 disable_irq_wake(data->oob_wake_irq);
4090         }
4091
4092         if (!test_bit(HCI_RUNNING, &hdev->flags))
4093                 goto done;
4094
4095         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
4096                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
4097                 if (err < 0) {
4098                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
4099                         goto failed;
4100                 }
4101         }
4102
4103         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
4104                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
4105                 if (err < 0) {
4106                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
4107                         goto failed;
4108                 }
4109
4110                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
4111         }
4112
4113         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
4114                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
4115                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
4116                 else
4117                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
4118         }
4119
4120         spin_lock_irq(&data->txlock);
4121         play_deferred(data);
4122         clear_bit(BTUSB_SUSPENDING, &data->flags);
4123         spin_unlock_irq(&data->txlock);
4124         schedule_work(&data->work);
4125
4126         return 0;
4127
4128 failed:
4129         usb_scuttle_anchored_urbs(&data->deferred);
4130 done:
4131         spin_lock_irq(&data->txlock);
4132         clear_bit(BTUSB_SUSPENDING, &data->flags);
4133         spin_unlock_irq(&data->txlock);
4134
4135         return err;
4136 }
4137 #endif
4138
4139 static struct usb_driver btusb_driver = {
4140         .name           = "btusb",
4141         .probe          = btusb_probe,
4142         .disconnect     = btusb_disconnect,
4143 #ifdef CONFIG_PM
4144         .suspend        = btusb_suspend,
4145         .resume         = btusb_resume,
4146 #endif
4147         .id_table       = btusb_table,
4148         .supports_autosuspend = 1,
4149         .disable_hub_initiated_lpm = 1,
4150 };
4151
4152 module_usb_driver(btusb_driver);
4153
4154 module_param(disable_scofix, bool, 0644);
4155 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
4156
4157 module_param(force_scofix, bool, 0644);
4158 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
4159
4160 module_param(enable_autosuspend, bool, 0644);
4161 MODULE_PARM_DESC(enable_autosuspend, "Enable USB autosuspend by default");
4162
4163 module_param(reset, bool, 0644);
4164 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
4165
4166 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
4167 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
4168 MODULE_VERSION(VERSION);
4169 MODULE_LICENSE("GPL");