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            0x01
  40 #define BTUSB_DIGIANSWER        0x02
  41 #define BTUSB_CSR               0x04
  42 #define BTUSB_SNIFFER           0x08
  43 #define BTUSB_BCM92035          0x10
  44 #define BTUSB_BROKEN_ISOC       0x20
  45 #define BTUSB_WRONG_SCO_MTU     0x40
  46 #define BTUSB_ATH3012           0x80
  47 #define BTUSB_INTEL_COMBINED    0x100
  48 #define BTUSB_INTEL_BOOT        0x200
  49 #define BTUSB_BCM_PATCHRAM      0x400
  50 #define BTUSB_MARVELL           0x800
  51 #define BTUSB_SWAVE             0x1000
  52 #define BTUSB_AMP               0x4000
  53 #define BTUSB_QCA_ROME          0x8000
  54 #define BTUSB_BCM_APPLE         0x10000
  55 #define BTUSB_REALTEK           0x20000
  56 #define BTUSB_BCM2045           0x40000
  57 #define BTUSB_IFNUM_2           0x80000
  58 #define BTUSB_CW6622            0x100000
  59 #define BTUSB_MEDIATEK          0x200000
  60 #define BTUSB_WIDEBAND_SPEECH   0x400000
  61 #define BTUSB_VALID_LE_STATES   0x800000
  62 #define BTUSB_QCA_WCN6855       0x1000000
  63 #define BTUSB_INTEL_BROKEN_SHUTDOWN_LED 0x2000000
  64 #define BTUSB_INTEL_BROKEN_INITIAL_NCMD 0x4000000
  65
  66 static const struct usb_device_id btusb_table[] = {
  67         /* Generic Bluetooth USB device */
  68         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
  69
  70         /* Generic Bluetooth AMP device */
  71         { USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
  72
  73         /* Generic Bluetooth USB interface */
  74         { USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },
  75
  76         /* Apple-specific (Broadcom) devices */
  77         { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
  78           .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },
  79
  80         /* MediaTek MT76x0E */
  81         { USB_DEVICE(0x0e8d, 0x763f) },
  82
  83         /* Broadcom SoftSailing reporting vendor specific */
  84         { USB_DEVICE(0x0a5c, 0x21e1) },
  85
  86         /* Apple MacBookPro 7,1 */
  87         { USB_DEVICE(0x05ac, 0x8213) },
  88
  89         /* Apple iMac11,1 */
  90         { USB_DEVICE(0x05ac, 0x8215) },
  91
  92         /* Apple MacBookPro6,2 */
  93         { USB_DEVICE(0x05ac, 0x8218) },
  94
  95         /* Apple MacBookAir3,1, MacBookAir3,2 */
  96         { USB_DEVICE(0x05ac, 0x821b) },
  97
  98         /* Apple MacBookAir4,1 */
  99         { USB_DEVICE(0x05ac, 0x821f) },
 100
 101         /* Apple MacBookPro8,2 */
 102         { USB_DEVICE(0x05ac, 0x821a) },
 103
 104         /* Apple MacMini5,1 */
 105         { USB_DEVICE(0x05ac, 0x8281) },
 106
 107         /* AVM BlueFRITZ! USB v2.0 */
 108         { USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },
 109
 110         /* Bluetooth Ultraport Module from IBM */
 111         { USB_DEVICE(0x04bf, 0x030a) },
 112
 113         /* ALPS Modules with non-standard id */
 114         { USB_DEVICE(0x044e, 0x3001) },
 115         { USB_DEVICE(0x044e, 0x3002) },
 116
 117         /* Ericsson with non-standard id */
 118         { USB_DEVICE(0x0bdb, 0x1002) },
 119
 120         /* Canyon CN-BTU1 with HID interfaces */
 121         { USB_DEVICE(0x0c10, 0x0000) },
 122
 123         /* Broadcom BCM20702B0 (Dynex/Insignia) */
 124         { USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
 125
 126         /* Broadcom BCM43142A0 (Foxconn/Lenovo) */
 127         { USB_VENDOR_AND_INTERFACE_INFO(0x105b, 0xff, 0x01, 0x01),
 128           .driver_info = BTUSB_BCM_PATCHRAM },
 129
 130         /* Broadcom BCM920703 (HTC Vive) */
 131         { USB_VENDOR_AND_INTERFACE_INFO(0x0bb4, 0xff, 0x01, 0x01),
 132           .driver_info = BTUSB_BCM_PATCHRAM },
 133
 134         /* Foxconn - Hon Hai */
 135         { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
 136           .driver_info = BTUSB_BCM_PATCHRAM },
 137
 138         /* Lite-On Technology - Broadcom based */
 139         { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
 140           .driver_info = BTUSB_BCM_PATCHRAM },
 141
 142         /* Broadcom devices with vendor specific id */
 143         { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
 144           .driver_info = BTUSB_BCM_PATCHRAM },
 145
 146         /* ASUSTek Computer - Broadcom based */
 147         { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
 148           .driver_info = BTUSB_BCM_PATCHRAM },
 149
 150         /* Belkin F8065bf - Broadcom based */
 151         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
 152           .driver_info = BTUSB_BCM_PATCHRAM },
 153
 154         /* IMC Networks - Broadcom based */
 155         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
 156           .driver_info = BTUSB_BCM_PATCHRAM },
 157
 158         /* Dell Computer - Broadcom based  */
 159         { USB_VENDOR_AND_INTERFACE_INFO(0x413c, 0xff, 0x01, 0x01),
 160           .driver_info = BTUSB_BCM_PATCHRAM },
 161
 162         /* Toshiba Corp - Broadcom based */
 163         { USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
 164           .driver_info = BTUSB_BCM_PATCHRAM },
 165
 166         /* Intel Bluetooth USB Bootloader (RAM module) */
 167         { USB_DEVICE(0x8087, 0x0a5a),
 168           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
 169
 170         { }     /* Terminating entry */
 171 };
 172
 173 MODULE_DEVICE_TABLE(usb, btusb_table);
 174
 175 static const struct usb_device_id blacklist_table[] = {
 176         /* CSR BlueCore devices */
 177         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
 178
 179         /* Broadcom BCM2033 without firmware */
 180         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
 181
 182         /* Broadcom BCM2045 devices */
 183         { USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },
 184
 185         /* Atheros 3011 with sflash firmware */
 186         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
 187         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
 188         { USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
 189         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
 190         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
 191         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
 192         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
 193
 194         /* Atheros AR9285 Malbec with sflash firmware */
 195         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
 196
 197         /* Atheros 3012 with sflash firmware */
 198         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
 199         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
 200         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
 201         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
 202         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
 203         { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
 204         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
 205         { USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
 206         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 207         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 208         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
 209         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
 210         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
 211         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
 212         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
 213         { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
 214         { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
 215         { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
 216         { USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
 217         { USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
 218         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 219         { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
 220         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
 221         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
 222         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
 223         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
 224         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 225         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 226         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
 227         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
 228         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
 229         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
 230         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
 231         { USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
 232         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
 233         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
 234         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
 235         { USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
 236         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 237         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 238         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 239         { USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
 240         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 241         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 242         { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
 243         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
 244         { USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
 245         { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
 246         { USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
 247         { USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
 248
 249         /* Atheros AR5BBU12 with sflash firmware */
 250         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
 251
 252         /* Atheros AR5BBU12 with sflash firmware */
 253         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
 254         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
 255
 256         /* QCA ROME chipset */
 257         { USB_DEVICE(0x0cf3, 0x535b), .driver_info = BTUSB_QCA_ROME |
 258                                                      BTUSB_WIDEBAND_SPEECH },
 259         { USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME |
 260                                                      BTUSB_WIDEBAND_SPEECH },
 261         { USB_DEVICE(0x0cf3, 0xe009), .driver_info = BTUSB_QCA_ROME |
 262                                                      BTUSB_WIDEBAND_SPEECH },
 263         { USB_DEVICE(0x0cf3, 0xe010), .driver_info = BTUSB_QCA_ROME |
 264                                                      BTUSB_WIDEBAND_SPEECH },
 265         { USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME |
 266                                                      BTUSB_WIDEBAND_SPEECH },
 267         { USB_DEVICE(0x0cf3, 0xe301), .driver_info = BTUSB_QCA_ROME |
 268                                                      BTUSB_WIDEBAND_SPEECH },
 269         { USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME |
 270                                                      BTUSB_WIDEBAND_SPEECH },
 271         { USB_DEVICE(0x0cf3, 0xe500), .driver_info = BTUSB_QCA_ROME |
 272                                                      BTUSB_WIDEBAND_SPEECH },
 273         { USB_DEVICE(0x0489, 0xe092), .driver_info = BTUSB_QCA_ROME |
 274                                                      BTUSB_WIDEBAND_SPEECH },
 275         { USB_DEVICE(0x0489, 0xe09f), .driver_info = BTUSB_QCA_ROME |
 276                                                      BTUSB_WIDEBAND_SPEECH },
 277         { USB_DEVICE(0x0489, 0xe0a2), .driver_info = BTUSB_QCA_ROME |
 278                                                      BTUSB_WIDEBAND_SPEECH },
 279         { USB_DEVICE(0x04ca, 0x3011), .driver_info = BTUSB_QCA_ROME |
 280                                                      BTUSB_WIDEBAND_SPEECH },
 281         { USB_DEVICE(0x04ca, 0x3015), .driver_info = BTUSB_QCA_ROME |
 282                                                      BTUSB_WIDEBAND_SPEECH },
 283         { USB_DEVICE(0x04ca, 0x3016), .driver_info = BTUSB_QCA_ROME |
 284                                                      BTUSB_WIDEBAND_SPEECH },
 285         { USB_DEVICE(0x04ca, 0x301a), .driver_info = BTUSB_QCA_ROME |
 286                                                      BTUSB_WIDEBAND_SPEECH },
 287         { USB_DEVICE(0x04ca, 0x3021), .driver_info = BTUSB_QCA_ROME |
 288                                                      BTUSB_WIDEBAND_SPEECH },
 289         { USB_DEVICE(0x13d3, 0x3491), .driver_info = BTUSB_QCA_ROME |
 290                                                      BTUSB_WIDEBAND_SPEECH },
 291         { USB_DEVICE(0x13d3, 0x3496), .driver_info = BTUSB_QCA_ROME |
 292                                                      BTUSB_WIDEBAND_SPEECH },
 293         { USB_DEVICE(0x13d3, 0x3501), .driver_info = BTUSB_QCA_ROME |
 294                                                      BTUSB_WIDEBAND_SPEECH },
 295
 296         /* QCA WCN6855 chipset */
 297         { USB_DEVICE(0x0cf3, 0xe600), .driver_info = BTUSB_QCA_WCN6855 |
 298                                                      BTUSB_WIDEBAND_SPEECH |
 299                                                      BTUSB_VALID_LE_STATES },
 300         { USB_DEVICE(0x0489, 0xe0cc), .driver_info = BTUSB_QCA_WCN6855 |
 301                                                      BTUSB_WIDEBAND_SPEECH |
 302                                                      BTUSB_VALID_LE_STATES },
 303         { USB_DEVICE(0x0489, 0xe0d6), .driver_info = BTUSB_QCA_WCN6855 |
 304                                                      BTUSB_WIDEBAND_SPEECH |
 305                                                      BTUSB_VALID_LE_STATES },
 306         { USB_DEVICE(0x0489, 0xe0e3), .driver_info = BTUSB_QCA_WCN6855 |
 307                                                      BTUSB_WIDEBAND_SPEECH |
 308                                                      BTUSB_VALID_LE_STATES },
 309         { USB_DEVICE(0x10ab, 0x9309), .driver_info = BTUSB_QCA_WCN6855 |
 310                                                      BTUSB_WIDEBAND_SPEECH |
 311                                                      BTUSB_VALID_LE_STATES },
 312         { USB_DEVICE(0x10ab, 0x9409), .driver_info = BTUSB_QCA_WCN6855 |
 313                                                      BTUSB_WIDEBAND_SPEECH |
 314                                                      BTUSB_VALID_LE_STATES },
 315         { USB_DEVICE(0x0489, 0xe0d0), .driver_info = BTUSB_QCA_WCN6855 |
 316                                                      BTUSB_WIDEBAND_SPEECH |
 317                                                      BTUSB_VALID_LE_STATES },
 318
 319         /* Broadcom BCM2035 */
 320         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 321         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
 322         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
 323
 324         /* Broadcom BCM2045 */
 325         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
 326         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
 327
 328         /* IBM/Lenovo ThinkPad with Broadcom chip */
 329         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
 330         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
 331
 332         /* HP laptop with Broadcom chip */
 333         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
 334
 335         /* Dell laptop with Broadcom chip */
 336         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
 337
 338         /* Dell Wireless 370 and 410 devices */
 339         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
 340         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
 341
 342         /* Belkin F8T012 and F8T013 devices */
 343         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
 344         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
 345
 346         /* Asus WL-BTD202 device */
 347         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
 348
 349         /* Kensington Bluetooth USB adapter */
 350         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
 351
 352         /* RTX Telecom based adapters with buggy SCO support */
 353         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
 354         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
 355
 356         /* CONWISE Technology based adapters with buggy SCO support */
 357         { USB_DEVICE(0x0e5e, 0x6622),
 358           .driver_info = BTUSB_BROKEN_ISOC | BTUSB_CW6622},
 359
 360         /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
 361         { USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
 362
 363         /* Digianswer devices */
 364         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
 365         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
 366
 367         /* CSR BlueCore Bluetooth Sniffer */
 368         { USB_DEVICE(0x0a12, 0x0002),
 369           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
 370
 371         /* Frontline ComProbe Bluetooth Sniffer */
 372         { USB_DEVICE(0x16d3, 0x0002),
 373           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
 374
 375         /* Marvell Bluetooth devices */
 376         { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
 377         { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
 378         { USB_DEVICE(0x1286, 0x204e), .driver_info = BTUSB_MARVELL },
 379
 380         /* Intel Bluetooth devices */
 381         { USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_COMBINED },
 382         { USB_DEVICE(0x8087, 0x0026), .driver_info = BTUSB_INTEL_COMBINED },
 383         { USB_DEVICE(0x8087, 0x0029), .driver_info = BTUSB_INTEL_COMBINED },
 384         { USB_DEVICE(0x8087, 0x0032), .driver_info = BTUSB_INTEL_COMBINED },
 385         { USB_DEVICE(0x8087, 0x0033), .driver_info = BTUSB_INTEL_COMBINED },
 386         { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
 387         { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL_COMBINED |
 388                                                      BTUSB_INTEL_BROKEN_INITIAL_NCMD |
 389                                                      BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
 390         { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL_COMBINED |
 391                                                      BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
 392         { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_COMBINED },
 393         { USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL_COMBINED |
 394                                                      BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
 395         { USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_COMBINED },
 396
 397         /* Other Intel Bluetooth devices */
 398         { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
 399           .driver_info = BTUSB_IGNORE },
 400
 401         /* Realtek 8822CE Bluetooth devices */
 402         { USB_DEVICE(0x0bda, 0xb00c), .driver_info = BTUSB_REALTEK |
 403                                                      BTUSB_WIDEBAND_SPEECH },
 404         { USB_DEVICE(0x0bda, 0xc822), .driver_info = BTUSB_REALTEK |
 405                                                      BTUSB_WIDEBAND_SPEECH },
 406
 407         /* Realtek 8852AE Bluetooth devices */
 408         { USB_DEVICE(0x0bda, 0xc852), .driver_info = BTUSB_REALTEK |
 409                                                      BTUSB_WIDEBAND_SPEECH },
 410         { USB_DEVICE(0x0bda, 0x385a), .driver_info = BTUSB_REALTEK |
 411                                                      BTUSB_WIDEBAND_SPEECH },
 412         { USB_DEVICE(0x0bda, 0x4852), .driver_info = BTUSB_REALTEK |
 413                                                      BTUSB_WIDEBAND_SPEECH },
 414         { USB_DEVICE(0x04c5, 0x165c), .driver_info = BTUSB_REALTEK |
 415                                                      BTUSB_WIDEBAND_SPEECH },
 416         { USB_DEVICE(0x04ca, 0x4006), .driver_info = BTUSB_REALTEK |
 417                                                      BTUSB_WIDEBAND_SPEECH },
 418
 419         /* Realtek Bluetooth devices */
 420         { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
 421           .driver_info = BTUSB_REALTEK },
 422
 423         /* MediaTek Bluetooth devices */
 424         { USB_VENDOR_AND_INTERFACE_INFO(0x0e8d, 0xe0, 0x01, 0x01),
 425           .driver_info = BTUSB_MEDIATEK |
 426                          BTUSB_WIDEBAND_SPEECH |
 427                          BTUSB_VALID_LE_STATES },
 428
 429         /* Additional MediaTek MT7615E Bluetooth devices */
 430         { USB_DEVICE(0x13d3, 0x3560), .driver_info = BTUSB_MEDIATEK},
 431
 432         /* Additional MediaTek MT7668 Bluetooth devices */
 433         { USB_DEVICE(0x043e, 0x3109), .driver_info = BTUSB_MEDIATEK |
 434                                                      BTUSB_WIDEBAND_SPEECH |
 435                                                      BTUSB_VALID_LE_STATES },
 436
 437         /* Additional MediaTek MT7921 Bluetooth devices */
 438         { USB_DEVICE(0x04ca, 0x3802), .driver_info = BTUSB_MEDIATEK |
 439                                                      BTUSB_WIDEBAND_SPEECH |
 440                                                      BTUSB_VALID_LE_STATES },
 441         { USB_DEVICE(0x13d3, 0x3563), .driver_info = BTUSB_MEDIATEK |
 442                                                      BTUSB_WIDEBAND_SPEECH |
 443                                                      BTUSB_VALID_LE_STATES },
 444         { USB_DEVICE(0x13d3, 0x3564), .driver_info = BTUSB_MEDIATEK |
 445                                                      BTUSB_WIDEBAND_SPEECH |
 446                                                      BTUSB_VALID_LE_STATES },
 447         { USB_DEVICE(0x0489, 0xe0cd), .driver_info = BTUSB_MEDIATEK |
 448                                                      BTUSB_WIDEBAND_SPEECH |
 449                                                      BTUSB_VALID_LE_STATES },
 450
 451         /* MediaTek MT7922A Bluetooth devices */
 452         { USB_DEVICE(0x0489, 0xe0d8), .driver_info = BTUSB_MEDIATEK |
 453                                                      BTUSB_WIDEBAND_SPEECH |
 454                                                      BTUSB_VALID_LE_STATES },
 455         { USB_DEVICE(0x0489, 0xe0d9), .driver_info = BTUSB_MEDIATEK |
 456                                                      BTUSB_WIDEBAND_SPEECH |
 457                                                      BTUSB_VALID_LE_STATES },
 458
 459         /* Additional Realtek 8723AE Bluetooth devices */
 460         { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
 461         { USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
 462
 463         /* Additional Realtek 8723BE Bluetooth devices */
 464         { USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
 465         { USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
 466         { USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
 467         { USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
 468         { USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
 469         { USB_DEVICE(0x13d3, 0x3494), .driver_info = BTUSB_REALTEK },
 470
 471         /* Additional Realtek 8723BU Bluetooth devices */
 472         { USB_DEVICE(0x7392, 0xa611), .driver_info = BTUSB_REALTEK },
 473
 474         /* Additional Realtek 8723DE Bluetooth devices */
 475         { USB_DEVICE(0x0bda, 0xb009), .driver_info = BTUSB_REALTEK },
 476         { USB_DEVICE(0x2ff8, 0xb011), .driver_info = BTUSB_REALTEK },
 477
 478         /* Additional Realtek 8761B Bluetooth devices */
 479         { USB_DEVICE(0x2357, 0x0604), .driver_info = BTUSB_REALTEK |
 480                                                      BTUSB_WIDEBAND_SPEECH },
 481
 482         /* Additional Realtek 8761BU Bluetooth devices */
 483         { USB_DEVICE(0x0b05, 0x190e), .driver_info = BTUSB_REALTEK |
 484                                                      BTUSB_WIDEBAND_SPEECH },
 485
 486         /* Additional Realtek 8821AE Bluetooth devices */
 487         { USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
 488         { USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
 489         { USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
 490         { USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
 491         { USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
 492
 493         /* Additional Realtek 8822BE Bluetooth devices */
 494         { USB_DEVICE(0x13d3, 0x3526), .driver_info = BTUSB_REALTEK },
 495         { USB_DEVICE(0x0b05, 0x185c), .driver_info = BTUSB_REALTEK },
 496
 497         /* Additional Realtek 8822CE Bluetooth devices */
 498         { USB_DEVICE(0x04ca, 0x4005), .driver_info = BTUSB_REALTEK |
 499                                                      BTUSB_WIDEBAND_SPEECH },
 500         { USB_DEVICE(0x04c5, 0x161f), .driver_info = BTUSB_REALTEK |
 501                                                      BTUSB_WIDEBAND_SPEECH },
 502         { USB_DEVICE(0x0b05, 0x18ef), .driver_info = BTUSB_REALTEK |
 503                                                      BTUSB_WIDEBAND_SPEECH },
 504         { USB_DEVICE(0x13d3, 0x3548), .driver_info = BTUSB_REALTEK |
 505                                                      BTUSB_WIDEBAND_SPEECH },
 506         { USB_DEVICE(0x13d3, 0x3549), .driver_info = BTUSB_REALTEK |
 507                                                      BTUSB_WIDEBAND_SPEECH },
 508         { USB_DEVICE(0x13d3, 0x3553), .driver_info = BTUSB_REALTEK |
 509                                                      BTUSB_WIDEBAND_SPEECH },
 510         { USB_DEVICE(0x13d3, 0x3555), .driver_info = BTUSB_REALTEK |
 511                                                      BTUSB_WIDEBAND_SPEECH },
 512         { USB_DEVICE(0x2ff8, 0x3051), .driver_info = BTUSB_REALTEK |
 513                                                      BTUSB_WIDEBAND_SPEECH },
 514         { USB_DEVICE(0x1358, 0xc123), .driver_info = BTUSB_REALTEK |
 515                                                      BTUSB_WIDEBAND_SPEECH },
 516         { USB_DEVICE(0x0bda, 0xc123), .driver_info = BTUSB_REALTEK |
 517                                                      BTUSB_WIDEBAND_SPEECH },
 518         { USB_DEVICE(0x0cb5, 0xc547), .driver_info = BTUSB_REALTEK |
 519                                                      BTUSB_WIDEBAND_SPEECH },
 520
 521         /* Silicon Wave based devices */
 522         { USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
 523
 524         { }     /* Terminating entry */
 525 };
 526
 527 /* The Bluetooth USB module build into some devices needs to be reset on resume,
 528  * this is a problem with the platform (likely shutting off all power) not with
 529  * the module itself. So we use a DMI list to match known broken platforms.
 530  */
 531 static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
 532         {
 533                 /* Dell OptiPlex 3060 (QCA ROME device 0cf3:e007) */
 534                 .matches = {
 535                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 536                         DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 3060"),
 537                 },
 538         },
 539         {
 540                 /* Dell XPS 9360 (QCA ROME device 0cf3:e300) */
 541                 .matches = {
 542                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 543                         DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
 544                 },
 545         },
 546         {
 547                 /* Dell Inspiron 5565 (QCA ROME device 0cf3:e009) */
 548                 .matches = {
 549                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 550                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5565"),
 551                 },
 552         },
 553         {}
 554 };
 555
 556 #define BTUSB_MAX_ISOC_FRAMES   10
 557
 558 #define BTUSB_INTR_RUNNING      0
 559 #define BTUSB_BULK_RUNNING      1
 560 #define BTUSB_ISOC_RUNNING      2
 561 #define BTUSB_SUSPENDING        3
 562 #define BTUSB_DID_ISO_RESUME    4
 563 #define BTUSB_BOOTLOADER        5
 564 #define BTUSB_DOWNLOADING       6
 565 #define BTUSB_FIRMWARE_LOADED   7
 566 #define BTUSB_FIRMWARE_FAILED   8
 567 #define BTUSB_BOOTING           9
 568 #define BTUSB_DIAG_RUNNING      10
 569 #define BTUSB_OOB_WAKE_ENABLED  11
 570 #define BTUSB_HW_RESET_ACTIVE   12
 571 #define BTUSB_TX_WAIT_VND_EVT   13
 572 #define BTUSB_WAKEUP_AUTOSUSPEND        14
 573 #define BTUSB_USE_ALT3_FOR_WBS  15
 574
 575 struct btusb_data {
 576         struct hci_dev       *hdev;
 577         struct usb_device    *udev;
 578         struct usb_interface *intf;
 579         struct usb_interface *isoc;
 580         struct usb_interface *diag;
 581         unsigned isoc_ifnum;
 582
 583         unsigned long flags;
 584
 585         bool poll_sync;
 586         int intr_interval;
 587         struct work_struct  work;
 588         struct work_struct  waker;
 589         struct delayed_work rx_work;
 590
 591         struct sk_buff_head acl_q;
 592
 593         struct usb_anchor deferred;
 594         struct usb_anchor tx_anchor;
 595         int tx_in_flight;
 596         spinlock_t txlock;
 597
 598         struct usb_anchor intr_anchor;
 599         struct usb_anchor bulk_anchor;
 600         struct usb_anchor isoc_anchor;
 601         struct usb_anchor diag_anchor;
 602         struct usb_anchor ctrl_anchor;
 603         spinlock_t rxlock;
 604
 605         struct sk_buff *evt_skb;
 606         struct sk_buff *acl_skb;
 607         struct sk_buff *sco_skb;
 608
 609         struct usb_endpoint_descriptor *intr_ep;
 610         struct usb_endpoint_descriptor *bulk_tx_ep;
 611         struct usb_endpoint_descriptor *bulk_rx_ep;
 612         struct usb_endpoint_descriptor *isoc_tx_ep;
 613         struct usb_endpoint_descriptor *isoc_rx_ep;
 614         struct usb_endpoint_descriptor *diag_tx_ep;
 615         struct usb_endpoint_descriptor *diag_rx_ep;
 616
 617         struct gpio_desc *reset_gpio;
 618
 619         __u8 cmdreq_type;
 620         __u8 cmdreq;
 621
 622         unsigned int sco_num;
 623         unsigned int air_mode;
 624         bool usb_alt6_packet_flow;
 625         int isoc_altsetting;
 626         int suspend_count;
 627
 628         int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
 629         int (*recv_acl)(struct hci_dev *hdev, struct sk_buff *skb);
 630         int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
 631
 632         int (*setup_on_usb)(struct hci_dev *hdev);
 633
 634         int oob_wake_irq;   /* irq for out-of-band wake-on-bt */
 635         unsigned cmd_timeout_cnt;
 636 };
 637
 638 static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
 639 {
 640         struct btusb_data *data = hci_get_drvdata(hdev);
 641         struct gpio_desc *reset_gpio = data->reset_gpio;
 642
 643         if (++data->cmd_timeout_cnt < 5)
 644                 return;
 645
 646         if (!reset_gpio) {
 647                 bt_dev_err(hdev, "No way to reset. Ignoring and continuing");
 648                 return;
 649         }
 650
 651         /*
 652          * Toggle the hard reset line if the platform provides one. The reset
 653          * is going to yank the device off the USB and then replug. So doing
 654          * once is enough. The cleanup is handled correctly on the way out
 655          * (standard USB disconnect), and the new device is detected cleanly
 656          * and bound to the driver again like it should be.
 657          */
 658         if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
 659                 bt_dev_err(hdev, "last reset failed? Not resetting again");
 660                 return;
 661         }
 662
 663         bt_dev_err(hdev, "Initiating HW reset via gpio");
 664         gpiod_set_value_cansleep(reset_gpio, 1);
 665         msleep(100);
 666         gpiod_set_value_cansleep(reset_gpio, 0);
 667 }
 668
 669 static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
 670 {
 671         struct btusb_data *data = hci_get_drvdata(hdev);
 672         struct gpio_desc *reset_gpio = data->reset_gpio;
 673
 674         if (++data->cmd_timeout_cnt < 5)
 675                 return;
 676
 677         if (!reset_gpio) {
 678                 bt_dev_err(hdev, "No gpio to reset Realtek device, ignoring");
 679                 return;
 680         }
 681
 682         /* Toggle the hard reset line. The Realtek device is going to
 683          * yank itself off the USB and then replug. The cleanup is handled
 684          * correctly on the way out (standard USB disconnect), and the new
 685          * device is detected cleanly and bound to the driver again like
 686          * it should be.
 687          */
 688         if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
 689                 bt_dev_err(hdev, "last reset failed? Not resetting again");
 690                 return;
 691         }
 692
 693         bt_dev_err(hdev, "Reset Realtek device via gpio");
 694         gpiod_set_value_cansleep(reset_gpio, 1);
 695         msleep(200);
 696         gpiod_set_value_cansleep(reset_gpio, 0);
 697 }
 698
 699 static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
 700 {
 701         struct btusb_data *data = hci_get_drvdata(hdev);
 702         struct gpio_desc *reset_gpio = data->reset_gpio;
 703         int err;
 704
 705         if (++data->cmd_timeout_cnt < 5)
 706                 return;
 707
 708         if (reset_gpio) {
 709                 bt_dev_err(hdev, "Reset qca device via bt_en gpio");
 710
 711                 /* Toggle the hard reset line. The qca bt 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                 gpiod_set_value_cansleep(reset_gpio, 0);
 723                 msleep(200);
 724                 gpiod_set_value_cansleep(reset_gpio, 1);
 725
 726                 return;
 727         }
 728
 729         bt_dev_err(hdev, "Multiple cmd timeouts seen. Resetting usb device.");
 730         /* This is not an unbalanced PM reference since the device will reset */
 731         err = usb_autopm_get_interface(data->intf);
 732         if (!err)
 733                 usb_queue_reset_device(data->intf);
 734         else
 735                 bt_dev_err(hdev, "Failed usb_autopm_get_interface with %d", err);
 736 }
 737
 738 static inline void btusb_free_frags(struct btusb_data *data)
 739 {
 740         unsigned long flags;
 741
 742         spin_lock_irqsave(&data->rxlock, flags);
 743
 744         kfree_skb(data->evt_skb);
 745         data->evt_skb = NULL;
 746
 747         kfree_skb(data->acl_skb);
 748         data->acl_skb = NULL;
 749
 750         kfree_skb(data->sco_skb);
 751         data->sco_skb = NULL;
 752
 753         spin_unlock_irqrestore(&data->rxlock, flags);
 754 }
 755
 756 static int btusb_recv_event(struct btusb_data *data, struct sk_buff *skb)
 757 {
 758         if (data->intr_interval) {
 759                 /* Trigger dequeue immediatelly if an event is received */
 760                 schedule_delayed_work(&data->rx_work, 0);
 761         }
 762
 763         return data->recv_event(data->hdev, skb);
 764 }
 765
 766 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
 767 {
 768         struct sk_buff *skb;
 769         unsigned long flags;
 770         int err = 0;
 771
 772         spin_lock_irqsave(&data->rxlock, flags);
 773         skb = data->evt_skb;
 774
 775         while (count) {
 776                 int len;
 777
 778                 if (!skb) {
 779                         skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
 780                         if (!skb) {
 781                                 err = -ENOMEM;
 782                                 break;
 783                         }
 784
 785                         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
 786                         hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
 787                 }
 788
 789                 len = min_t(uint, hci_skb_expect(skb), count);
 790                 skb_put_data(skb, buffer, len);
 791
 792                 count -= len;
 793                 buffer += len;
 794                 hci_skb_expect(skb) -= len;
 795
 796                 if (skb->len == HCI_EVENT_HDR_SIZE) {
 797                         /* Complete event header */
 798                         hci_skb_expect(skb) = hci_event_hdr(skb)->plen;
 799
 800                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 801                                 kfree_skb(skb);
 802                                 skb = NULL;
 803
 804                                 err = -EILSEQ;
 805                                 break;
 806                         }
 807                 }
 808
 809                 if (!hci_skb_expect(skb)) {
 810                         /* Complete frame */
 811                         btusb_recv_event(data, skb);
 812                         skb = NULL;
 813                 }
 814         }
 815
 816         data->evt_skb = skb;
 817         spin_unlock_irqrestore(&data->rxlock, flags);
 818
 819         return err;
 820 }
 821
 822 static int btusb_recv_acl(struct btusb_data *data, struct sk_buff *skb)
 823 {
 824         /* Only queue ACL packet if intr_interval is set as it means
 825          * force_poll_sync has been enabled.
 826          */
 827         if (!data->intr_interval)
 828                 return data->recv_acl(data->hdev, skb);
 829
 830         skb_queue_tail(&data->acl_q, skb);
 831         schedule_delayed_work(&data->rx_work, data->intr_interval);
 832
 833         return 0;
 834 }
 835
 836 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
 837 {
 838         struct sk_buff *skb;
 839         unsigned long flags;
 840         int err = 0;
 841
 842         spin_lock_irqsave(&data->rxlock, flags);
 843         skb = data->acl_skb;
 844
 845         while (count) {
 846                 int len;
 847
 848                 if (!skb) {
 849                         skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
 850                         if (!skb) {
 851                                 err = -ENOMEM;
 852                                 break;
 853                         }
 854
 855                         hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
 856                         hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
 857                 }
 858
 859                 len = min_t(uint, hci_skb_expect(skb), count);
 860                 skb_put_data(skb, buffer, len);
 861
 862                 count -= len;
 863                 buffer += len;
 864                 hci_skb_expect(skb) -= len;
 865
 866                 if (skb->len == HCI_ACL_HDR_SIZE) {
 867                         __le16 dlen = hci_acl_hdr(skb)->dlen;
 868
 869                         /* Complete ACL header */
 870                         hci_skb_expect(skb) = __le16_to_cpu(dlen);
 871
 872                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 873                                 kfree_skb(skb);
 874                                 skb = NULL;
 875
 876                                 err = -EILSEQ;
 877                                 break;
 878                         }
 879                 }
 880
 881                 if (!hci_skb_expect(skb)) {
 882                         /* Complete frame */
 883                         btusb_recv_acl(data, skb);
 884                         skb = NULL;
 885                 }
 886         }
 887
 888         data->acl_skb = skb;
 889         spin_unlock_irqrestore(&data->rxlock, flags);
 890
 891         return err;
 892 }
 893
 894 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
 895 {
 896         struct sk_buff *skb;
 897         unsigned long flags;
 898         int err = 0;
 899
 900         spin_lock_irqsave(&data->rxlock, flags);
 901         skb = data->sco_skb;
 902
 903         while (count) {
 904                 int len;
 905
 906                 if (!skb) {
 907                         skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
 908                         if (!skb) {
 909                                 err = -ENOMEM;
 910                                 break;
 911                         }
 912
 913                         hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
 914                         hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
 915                 }
 916
 917                 len = min_t(uint, hci_skb_expect(skb), count);
 918                 skb_put_data(skb, buffer, len);
 919
 920                 count -= len;
 921                 buffer += len;
 922                 hci_skb_expect(skb) -= len;
 923
 924                 if (skb->len == HCI_SCO_HDR_SIZE) {
 925                         /* Complete SCO header */
 926                         hci_skb_expect(skb) = hci_sco_hdr(skb)->dlen;
 927
 928                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
 929                                 kfree_skb(skb);
 930                                 skb = NULL;
 931
 932                                 err = -EILSEQ;
 933                                 break;
 934                         }
 935                 }
 936
 937                 if (!hci_skb_expect(skb)) {
 938                         /* Complete frame */
 939                         hci_recv_frame(data->hdev, skb);
 940                         skb = NULL;
 941                 }
 942         }
 943
 944         data->sco_skb = skb;
 945         spin_unlock_irqrestore(&data->rxlock, flags);
 946
 947         return err;
 948 }
 949
 950 static void btusb_intr_complete(struct urb *urb)
 951 {
 952         struct hci_dev *hdev = urb->context;
 953         struct btusb_data *data = hci_get_drvdata(hdev);
 954         int err;
 955
 956         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
 957                urb->actual_length);
 958
 959         if (!test_bit(HCI_RUNNING, &hdev->flags))
 960                 return;
 961
 962         if (urb->status == 0) {
 963                 hdev->stat.byte_rx += urb->actual_length;
 964
 965                 if (btusb_recv_intr(data, urb->transfer_buffer,
 966                                     urb->actual_length) < 0) {
 967                         bt_dev_err(hdev, "corrupted event packet");
 968                         hdev->stat.err_rx++;
 969                 }
 970         } else if (urb->status == -ENOENT) {
 971                 /* Avoid suspend failed when usb_kill_urb */
 972                 return;
 973         }
 974
 975         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 976                 return;
 977
 978         usb_mark_last_busy(data->udev);
 979         usb_anchor_urb(urb, &data->intr_anchor);
 980
 981         err = usb_submit_urb(urb, GFP_ATOMIC);
 982         if (err < 0) {
 983                 /* -EPERM: urb is being killed;
 984                  * -ENODEV: device got disconnected
 985                  */
 986                 if (err != -EPERM && err != -ENODEV)
 987                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
 988                                    urb, -err);
 989                 if (err != -EPERM)
 990                         hci_cmd_sync_cancel(hdev, -err);
 991                 usb_unanchor_urb(urb);
 992         }
 993 }
 994
 995 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 996 {
 997         struct btusb_data *data = hci_get_drvdata(hdev);
 998         struct urb *urb;
 999         unsigned char *buf;
1000         unsigned int pipe;
1001         int err, size;
1002
1003         BT_DBG("%s", hdev->name);
1004
1005         if (!data->intr_ep)
1006                 return -ENODEV;
1007
1008         urb = usb_alloc_urb(0, mem_flags);
1009         if (!urb)
1010                 return -ENOMEM;
1011
1012         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
1013
1014         buf = kmalloc(size, mem_flags);
1015         if (!buf) {
1016                 usb_free_urb(urb);
1017                 return -ENOMEM;
1018         }
1019
1020         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
1021
1022         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
1023                          btusb_intr_complete, hdev, data->intr_ep->bInterval);
1024
1025         urb->transfer_flags |= URB_FREE_BUFFER;
1026
1027         usb_anchor_urb(urb, &data->intr_anchor);
1028
1029         err = usb_submit_urb(urb, mem_flags);
1030         if (err < 0) {
1031                 if (err != -EPERM && err != -ENODEV)
1032                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1033                                    urb, -err);
1034                 if (err != -EPERM)
1035                         hci_cmd_sync_cancel(hdev, -err);
1036                 usb_unanchor_urb(urb);
1037         }
1038
1039         /* Only initialize intr_interval if URB poll sync is enabled */
1040         if (!data->poll_sync)
1041                 goto done;
1042
1043         /* The units are frames (milliseconds) for full and low speed devices,
1044          * and microframes (1/8 millisecond) for highspeed and SuperSpeed
1045          * devices.
1046          *
1047          * This is done once on open/resume so it shouldn't change even if
1048          * force_poll_sync changes.
1049          */
1050         switch (urb->dev->speed) {
1051         case USB_SPEED_SUPER_PLUS:
1052         case USB_SPEED_SUPER:   /* units are 125us */
1053                 data->intr_interval = usecs_to_jiffies(urb->interval * 125);
1054                 break;
1055         default:
1056                 data->intr_interval = msecs_to_jiffies(urb->interval);
1057                 break;
1058         }
1059
1060 done:
1061         usb_free_urb(urb);
1062
1063         return err;
1064 }
1065
1066 static void btusb_bulk_complete(struct urb *urb)
1067 {
1068         struct hci_dev *hdev = urb->context;
1069         struct btusb_data *data = hci_get_drvdata(hdev);
1070         int err;
1071
1072         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1073                urb->actual_length);
1074
1075         if (!test_bit(HCI_RUNNING, &hdev->flags))
1076                 return;
1077
1078         if (urb->status == 0) {
1079                 hdev->stat.byte_rx += urb->actual_length;
1080
1081                 if (data->recv_bulk(data, urb->transfer_buffer,
1082                                     urb->actual_length) < 0) {
1083                         bt_dev_err(hdev, "corrupted ACL packet");
1084                         hdev->stat.err_rx++;
1085                 }
1086         } else if (urb->status == -ENOENT) {
1087                 /* Avoid suspend failed when usb_kill_urb */
1088                 return;
1089         }
1090
1091         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
1092                 return;
1093
1094         usb_anchor_urb(urb, &data->bulk_anchor);
1095         usb_mark_last_busy(data->udev);
1096
1097         err = usb_submit_urb(urb, GFP_ATOMIC);
1098         if (err < 0) {
1099                 /* -EPERM: urb is being killed;
1100                  * -ENODEV: device got disconnected
1101                  */
1102                 if (err != -EPERM && err != -ENODEV)
1103                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1104                                    urb, -err);
1105                 usb_unanchor_urb(urb);
1106         }
1107 }
1108
1109 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
1110 {
1111         struct btusb_data *data = hci_get_drvdata(hdev);
1112         struct urb *urb;
1113         unsigned char *buf;
1114         unsigned int pipe;
1115         int err, size = HCI_MAX_FRAME_SIZE;
1116
1117         BT_DBG("%s", hdev->name);
1118
1119         if (!data->bulk_rx_ep)
1120                 return -ENODEV;
1121
1122         urb = usb_alloc_urb(0, mem_flags);
1123         if (!urb)
1124                 return -ENOMEM;
1125
1126         buf = kmalloc(size, mem_flags);
1127         if (!buf) {
1128                 usb_free_urb(urb);
1129                 return -ENOMEM;
1130         }
1131
1132         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
1133
1134         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1135                           btusb_bulk_complete, hdev);
1136
1137         urb->transfer_flags |= URB_FREE_BUFFER;
1138
1139         usb_mark_last_busy(data->udev);
1140         usb_anchor_urb(urb, &data->bulk_anchor);
1141
1142         err = usb_submit_urb(urb, mem_flags);
1143         if (err < 0) {
1144                 if (err != -EPERM && err != -ENODEV)
1145                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1146                                    urb, -err);
1147                 usb_unanchor_urb(urb);
1148         }
1149
1150         usb_free_urb(urb);
1151
1152         return err;
1153 }
1154
1155 static void btusb_isoc_complete(struct urb *urb)
1156 {
1157         struct hci_dev *hdev = urb->context;
1158         struct btusb_data *data = hci_get_drvdata(hdev);
1159         int i, err;
1160
1161         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1162                urb->actual_length);
1163
1164         if (!test_bit(HCI_RUNNING, &hdev->flags))
1165                 return;
1166
1167         if (urb->status == 0) {
1168                 for (i = 0; i < urb->number_of_packets; i++) {
1169                         unsigned int offset = urb->iso_frame_desc[i].offset;
1170                         unsigned int length = urb->iso_frame_desc[i].actual_length;
1171
1172                         if (urb->iso_frame_desc[i].status)
1173                                 continue;
1174
1175                         hdev->stat.byte_rx += length;
1176
1177                         if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
1178                                             length) < 0) {
1179                                 bt_dev_err(hdev, "corrupted SCO packet");
1180                                 hdev->stat.err_rx++;
1181                         }
1182                 }
1183         } else if (urb->status == -ENOENT) {
1184                 /* Avoid suspend failed when usb_kill_urb */
1185                 return;
1186         }
1187
1188         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
1189                 return;
1190
1191         usb_anchor_urb(urb, &data->isoc_anchor);
1192
1193         err = usb_submit_urb(urb, GFP_ATOMIC);
1194         if (err < 0) {
1195                 /* -EPERM: urb is being killed;
1196                  * -ENODEV: device got disconnected
1197                  */
1198                 if (err != -EPERM && err != -ENODEV)
1199                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1200                                    urb, -err);
1201                 usb_unanchor_urb(urb);
1202         }
1203 }
1204
1205 static inline void __fill_isoc_descriptor_msbc(struct urb *urb, int len,
1206                                                int mtu, struct btusb_data *data)
1207 {
1208         int i, offset = 0;
1209         unsigned int interval;
1210
1211         BT_DBG("len %d mtu %d", len, mtu);
1212
1213         /* For mSBC ALT 6 setting the host will send the packet at continuous
1214          * flow. As per core spec 5, vol 4, part B, table 2.1. For ALT setting
1215          * 6 the HCI PACKET INTERVAL should be 7.5ms for every usb packets.
1216          * To maintain the rate we send 63bytes of usb packets alternatively for
1217          * 7ms and 8ms to maintain the rate as 7.5ms.
1218          */
1219         if (data->usb_alt6_packet_flow) {
1220                 interval = 7;
1221                 data->usb_alt6_packet_flow = false;
1222         } else {
1223                 interval = 6;
1224                 data->usb_alt6_packet_flow = true;
1225         }
1226
1227         for (i = 0; i < interval; i++) {
1228                 urb->iso_frame_desc[i].offset = offset;
1229                 urb->iso_frame_desc[i].length = offset;
1230         }
1231
1232         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1233                 urb->iso_frame_desc[i].offset = offset;
1234                 urb->iso_frame_desc[i].length = len;
1235                 i++;
1236         }
1237
1238         urb->number_of_packets = i;
1239 }
1240
1241 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
1242 {
1243         int i, offset = 0;
1244
1245         BT_DBG("len %d mtu %d", len, mtu);
1246
1247         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
1248                                         i++, offset += mtu, len -= mtu) {
1249                 urb->iso_frame_desc[i].offset = offset;
1250                 urb->iso_frame_desc[i].length = mtu;
1251         }
1252
1253         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1254                 urb->iso_frame_desc[i].offset = offset;
1255                 urb->iso_frame_desc[i].length = len;
1256                 i++;
1257         }
1258
1259         urb->number_of_packets = i;
1260 }
1261
1262 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
1263 {
1264         struct btusb_data *data = hci_get_drvdata(hdev);
1265         struct urb *urb;
1266         unsigned char *buf;
1267         unsigned int pipe;
1268         int err, size;
1269
1270         BT_DBG("%s", hdev->name);
1271
1272         if (!data->isoc_rx_ep)
1273                 return -ENODEV;
1274
1275         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
1276         if (!urb)
1277                 return -ENOMEM;
1278
1279         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
1280                                                 BTUSB_MAX_ISOC_FRAMES;
1281
1282         buf = kmalloc(size, mem_flags);
1283         if (!buf) {
1284                 usb_free_urb(urb);
1285                 return -ENOMEM;
1286         }
1287
1288         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
1289
1290         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
1291                          hdev, data->isoc_rx_ep->bInterval);
1292
1293         urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
1294
1295         __fill_isoc_descriptor(urb, size,
1296                                le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
1297
1298         usb_anchor_urb(urb, &data->isoc_anchor);
1299
1300         err = usb_submit_urb(urb, mem_flags);
1301         if (err < 0) {
1302                 if (err != -EPERM && err != -ENODEV)
1303                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1304                                    urb, -err);
1305                 usb_unanchor_urb(urb);
1306         }
1307
1308         usb_free_urb(urb);
1309
1310         return err;
1311 }
1312
1313 static void btusb_diag_complete(struct urb *urb)
1314 {
1315         struct hci_dev *hdev = urb->context;
1316         struct btusb_data *data = hci_get_drvdata(hdev);
1317         int err;
1318
1319         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1320                urb->actual_length);
1321
1322         if (urb->status == 0) {
1323                 struct sk_buff *skb;
1324
1325                 skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
1326                 if (skb) {
1327                         skb_put_data(skb, urb->transfer_buffer,
1328                                      urb->actual_length);
1329                         hci_recv_diag(hdev, skb);
1330                 }
1331         } else if (urb->status == -ENOENT) {
1332                 /* Avoid suspend failed when usb_kill_urb */
1333                 return;
1334         }
1335
1336         if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
1337                 return;
1338
1339         usb_anchor_urb(urb, &data->diag_anchor);
1340         usb_mark_last_busy(data->udev);
1341
1342         err = usb_submit_urb(urb, GFP_ATOMIC);
1343         if (err < 0) {
1344                 /* -EPERM: urb is being killed;
1345                  * -ENODEV: device got disconnected
1346                  */
1347                 if (err != -EPERM && err != -ENODEV)
1348                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1349                                    urb, -err);
1350                 usb_unanchor_urb(urb);
1351         }
1352 }
1353
1354 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
1355 {
1356         struct btusb_data *data = hci_get_drvdata(hdev);
1357         struct urb *urb;
1358         unsigned char *buf;
1359         unsigned int pipe;
1360         int err, size = HCI_MAX_FRAME_SIZE;
1361
1362         BT_DBG("%s", hdev->name);
1363
1364         if (!data->diag_rx_ep)
1365                 return -ENODEV;
1366
1367         urb = usb_alloc_urb(0, mem_flags);
1368         if (!urb)
1369                 return -ENOMEM;
1370
1371         buf = kmalloc(size, mem_flags);
1372         if (!buf) {
1373                 usb_free_urb(urb);
1374                 return -ENOMEM;
1375         }
1376
1377         pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
1378
1379         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1380                           btusb_diag_complete, hdev);
1381
1382         urb->transfer_flags |= URB_FREE_BUFFER;
1383
1384         usb_mark_last_busy(data->udev);
1385         usb_anchor_urb(urb, &data->diag_anchor);
1386
1387         err = usb_submit_urb(urb, mem_flags);
1388         if (err < 0) {
1389                 if (err != -EPERM && err != -ENODEV)
1390                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1391                                    urb, -err);
1392                 usb_unanchor_urb(urb);
1393         }
1394
1395         usb_free_urb(urb);
1396
1397         return err;
1398 }
1399
1400 static void btusb_tx_complete(struct urb *urb)
1401 {
1402         struct sk_buff *skb = urb->context;
1403         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1404         struct btusb_data *data = hci_get_drvdata(hdev);
1405         unsigned long flags;
1406
1407         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1408                urb->actual_length);
1409
1410         if (!test_bit(HCI_RUNNING, &hdev->flags))
1411                 goto done;
1412
1413         if (!urb->status) {
1414                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1415         } else {
1416                 if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT)
1417                         hci_cmd_sync_cancel(hdev, -urb->status);
1418                 hdev->stat.err_tx++;
1419         }
1420
1421 done:
1422         spin_lock_irqsave(&data->txlock, flags);
1423         data->tx_in_flight--;
1424         spin_unlock_irqrestore(&data->txlock, flags);
1425
1426         kfree(urb->setup_packet);
1427
1428         kfree_skb(skb);
1429 }
1430
1431 static void btusb_isoc_tx_complete(struct urb *urb)
1432 {
1433         struct sk_buff *skb = urb->context;
1434         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
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                 hdev->stat.err_tx++;
1446
1447 done:
1448         kfree(urb->setup_packet);
1449
1450         kfree_skb(skb);
1451 }
1452
1453 static int btusb_open(struct hci_dev *hdev)
1454 {
1455         struct btusb_data *data = hci_get_drvdata(hdev);
1456         int err;
1457
1458         BT_DBG("%s", hdev->name);
1459
1460         err = usb_autopm_get_interface(data->intf);
1461         if (err < 0)
1462                 return err;
1463
1464         /* Patching USB firmware files prior to starting any URBs of HCI path
1465          * It is more safe to use USB bulk channel for downloading USB patch
1466          */
1467         if (data->setup_on_usb) {
1468                 err = data->setup_on_usb(hdev);
1469                 if (err < 0)
1470                         goto setup_fail;
1471         }
1472
1473         data->intf->needs_remote_wakeup = 1;
1474
1475         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1476                 goto done;
1477
1478         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1479         if (err < 0)
1480                 goto failed;
1481
1482         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1483         if (err < 0) {
1484                 usb_kill_anchored_urbs(&data->intr_anchor);
1485                 goto failed;
1486         }
1487
1488         set_bit(BTUSB_BULK_RUNNING, &data->flags);
1489         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1490
1491         if (data->diag) {
1492                 if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1493                         set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1494         }
1495
1496 done:
1497         usb_autopm_put_interface(data->intf);
1498         return 0;
1499
1500 failed:
1501         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1502 setup_fail:
1503         usb_autopm_put_interface(data->intf);
1504         return err;
1505 }
1506
1507 static void btusb_stop_traffic(struct btusb_data *data)
1508 {
1509         usb_kill_anchored_urbs(&data->intr_anchor);
1510         usb_kill_anchored_urbs(&data->bulk_anchor);
1511         usb_kill_anchored_urbs(&data->isoc_anchor);
1512         usb_kill_anchored_urbs(&data->diag_anchor);
1513         usb_kill_anchored_urbs(&data->ctrl_anchor);
1514 }
1515
1516 static int btusb_close(struct hci_dev *hdev)
1517 {
1518         struct btusb_data *data = hci_get_drvdata(hdev);
1519         int err;
1520
1521         BT_DBG("%s", hdev->name);
1522
1523         cancel_delayed_work(&data->rx_work);
1524         cancel_work_sync(&data->work);
1525         cancel_work_sync(&data->waker);
1526
1527         skb_queue_purge(&data->acl_q);
1528
1529         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1530         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1531         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1532         clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1533
1534         btusb_stop_traffic(data);
1535         btusb_free_frags(data);
1536
1537         err = usb_autopm_get_interface(data->intf);
1538         if (err < 0)
1539                 goto failed;
1540
1541         data->intf->needs_remote_wakeup = 0;
1542
1543         /* Enable remote wake up for auto-suspend */
1544         if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags))
1545                 data->intf->needs_remote_wakeup = 1;
1546
1547         usb_autopm_put_interface(data->intf);
1548
1549 failed:
1550         usb_scuttle_anchored_urbs(&data->deferred);
1551         return 0;
1552 }
1553
1554 static int btusb_flush(struct hci_dev *hdev)
1555 {
1556         struct btusb_data *data = hci_get_drvdata(hdev);
1557
1558         BT_DBG("%s", hdev->name);
1559
1560         cancel_delayed_work(&data->rx_work);
1561
1562         skb_queue_purge(&data->acl_q);
1563
1564         usb_kill_anchored_urbs(&data->tx_anchor);
1565         btusb_free_frags(data);
1566
1567         return 0;
1568 }
1569
1570 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1571 {
1572         struct btusb_data *data = hci_get_drvdata(hdev);
1573         struct usb_ctrlrequest *dr;
1574         struct urb *urb;
1575         unsigned int pipe;
1576
1577         urb = usb_alloc_urb(0, GFP_KERNEL);
1578         if (!urb)
1579                 return ERR_PTR(-ENOMEM);
1580
1581         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1582         if (!dr) {
1583                 usb_free_urb(urb);
1584                 return ERR_PTR(-ENOMEM);
1585         }
1586
1587         dr->bRequestType = data->cmdreq_type;
1588         dr->bRequest     = data->cmdreq;
1589         dr->wIndex       = 0;
1590         dr->wValue       = 0;
1591         dr->wLength      = __cpu_to_le16(skb->len);
1592
1593         pipe = usb_sndctrlpipe(data->udev, 0x00);
1594
1595         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1596                              skb->data, skb->len, btusb_tx_complete, skb);
1597
1598         skb->dev = (void *)hdev;
1599
1600         return urb;
1601 }
1602
1603 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1604 {
1605         struct btusb_data *data = hci_get_drvdata(hdev);
1606         struct urb *urb;
1607         unsigned int pipe;
1608
1609         if (!data->bulk_tx_ep)
1610                 return ERR_PTR(-ENODEV);
1611
1612         urb = usb_alloc_urb(0, GFP_KERNEL);
1613         if (!urb)
1614                 return ERR_PTR(-ENOMEM);
1615
1616         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1617
1618         usb_fill_bulk_urb(urb, data->udev, pipe,
1619                           skb->data, skb->len, btusb_tx_complete, skb);
1620
1621         skb->dev = (void *)hdev;
1622
1623         return urb;
1624 }
1625
1626 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1627 {
1628         struct btusb_data *data = hci_get_drvdata(hdev);
1629         struct urb *urb;
1630         unsigned int pipe;
1631
1632         if (!data->isoc_tx_ep)
1633                 return ERR_PTR(-ENODEV);
1634
1635         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1636         if (!urb)
1637                 return ERR_PTR(-ENOMEM);
1638
1639         pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1640
1641         usb_fill_int_urb(urb, data->udev, pipe,
1642                          skb->data, skb->len, btusb_isoc_tx_complete,
1643                          skb, data->isoc_tx_ep->bInterval);
1644
1645         urb->transfer_flags  = URB_ISO_ASAP;
1646
1647         if (data->isoc_altsetting == 6)
1648                 __fill_isoc_descriptor_msbc(urb, skb->len,
1649                                             le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize),
1650                                             data);
1651         else
1652                 __fill_isoc_descriptor(urb, skb->len,
1653                                        le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1654         skb->dev = (void *)hdev;
1655
1656         return urb;
1657 }
1658
1659 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1660 {
1661         struct btusb_data *data = hci_get_drvdata(hdev);
1662         int err;
1663
1664         usb_anchor_urb(urb, &data->tx_anchor);
1665
1666         err = usb_submit_urb(urb, GFP_KERNEL);
1667         if (err < 0) {
1668                 if (err != -EPERM && err != -ENODEV)
1669                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1670                                    urb, -err);
1671                 kfree(urb->setup_packet);
1672                 usb_unanchor_urb(urb);
1673         } else {
1674                 usb_mark_last_busy(data->udev);
1675         }
1676
1677         usb_free_urb(urb);
1678         return err;
1679 }
1680
1681 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1682 {
1683         struct btusb_data *data = hci_get_drvdata(hdev);
1684         unsigned long flags;
1685         bool suspending;
1686
1687         spin_lock_irqsave(&data->txlock, flags);
1688         suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1689         if (!suspending)
1690                 data->tx_in_flight++;
1691         spin_unlock_irqrestore(&data->txlock, flags);
1692
1693         if (!suspending)
1694                 return submit_tx_urb(hdev, urb);
1695
1696         usb_anchor_urb(urb, &data->deferred);
1697         schedule_work(&data->waker);
1698
1699         usb_free_urb(urb);
1700         return 0;
1701 }
1702
1703 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1704 {
1705         struct urb *urb;
1706
1707         BT_DBG("%s", hdev->name);
1708
1709         switch (hci_skb_pkt_type(skb)) {
1710         case HCI_COMMAND_PKT:
1711                 urb = alloc_ctrl_urb(hdev, skb);
1712                 if (IS_ERR(urb))
1713                         return PTR_ERR(urb);
1714
1715                 hdev->stat.cmd_tx++;
1716                 return submit_or_queue_tx_urb(hdev, urb);
1717
1718         case HCI_ACLDATA_PKT:
1719                 urb = alloc_bulk_urb(hdev, skb);
1720                 if (IS_ERR(urb))
1721                         return PTR_ERR(urb);
1722
1723                 hdev->stat.acl_tx++;
1724                 return submit_or_queue_tx_urb(hdev, urb);
1725
1726         case HCI_SCODATA_PKT:
1727                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1728                         return -ENODEV;
1729
1730                 urb = alloc_isoc_urb(hdev, skb);
1731                 if (IS_ERR(urb))
1732                         return PTR_ERR(urb);
1733
1734                 hdev->stat.sco_tx++;
1735                 return submit_tx_urb(hdev, urb);
1736         }
1737
1738         return -EILSEQ;
1739 }
1740
1741 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1742 {
1743         struct btusb_data *data = hci_get_drvdata(hdev);
1744
1745         BT_DBG("%s evt %d", hdev->name, evt);
1746
1747         if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1748                 data->sco_num = hci_conn_num(hdev, SCO_LINK);
1749                 data->air_mode = evt;
1750                 schedule_work(&data->work);
1751         }
1752 }
1753
1754 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1755 {
1756         struct btusb_data *data = hci_get_drvdata(hdev);
1757         struct usb_interface *intf = data->isoc;
1758         struct usb_endpoint_descriptor *ep_desc;
1759         int i, err;
1760
1761         if (!data->isoc)
1762                 return -ENODEV;
1763
1764         err = usb_set_interface(data->udev, data->isoc_ifnum, altsetting);
1765         if (err < 0) {
1766                 bt_dev_err(hdev, "setting interface failed (%d)", -err);
1767                 return err;
1768         }
1769
1770         data->isoc_altsetting = altsetting;
1771
1772         data->isoc_tx_ep = NULL;
1773         data->isoc_rx_ep = NULL;
1774
1775         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1776                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1777
1778                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1779                         data->isoc_tx_ep = ep_desc;
1780                         continue;
1781                 }
1782
1783                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1784                         data->isoc_rx_ep = ep_desc;
1785                         continue;
1786                 }
1787         }
1788
1789         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1790                 bt_dev_err(hdev, "invalid SCO descriptors");
1791                 return -ENODEV;
1792         }
1793
1794         return 0;
1795 }
1796
1797 static int btusb_switch_alt_setting(struct hci_dev *hdev, int new_alts)
1798 {
1799         struct btusb_data *data = hci_get_drvdata(hdev);
1800         int err;
1801
1802         if (data->isoc_altsetting != new_alts) {
1803                 unsigned long flags;
1804
1805                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1806                 usb_kill_anchored_urbs(&data->isoc_anchor);
1807
1808                 /* When isochronous alternate setting needs to be
1809                  * changed, because SCO connection has been added
1810                  * or removed, a packet fragment may be left in the
1811                  * reassembling state. This could lead to wrongly
1812                  * assembled fragments.
1813                  *
1814                  * Clear outstanding fragment when selecting a new
1815                  * alternate setting.
1816                  */
1817                 spin_lock_irqsave(&data->rxlock, flags);
1818                 kfree_skb(data->sco_skb);
1819                 data->sco_skb = NULL;
1820                 spin_unlock_irqrestore(&data->rxlock, flags);
1821
1822                 err = __set_isoc_interface(hdev, new_alts);
1823                 if (err < 0)
1824                         return err;
1825         }
1826
1827         if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1828                 if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1829                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1830                 else
1831                         btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1832         }
1833
1834         return 0;
1835 }
1836
1837 static struct usb_host_interface *btusb_find_altsetting(struct btusb_data *data,
1838                                                         int alt)
1839 {
1840         struct usb_interface *intf = data->isoc;
1841         int i;
1842
1843         BT_DBG("Looking for Alt no :%d", alt);
1844
1845         if (!intf)
1846                 return NULL;
1847
1848         for (i = 0; i < intf->num_altsetting; i++) {
1849                 if (intf->altsetting[i].desc.bAlternateSetting == alt)
1850                         return &intf->altsetting[i];
1851         }
1852
1853         return NULL;
1854 }
1855
1856 static void btusb_work(struct work_struct *work)
1857 {
1858         struct btusb_data *data = container_of(work, struct btusb_data, work);
1859         struct hci_dev *hdev = data->hdev;
1860         int new_alts = 0;
1861         int err;
1862
1863         if (data->sco_num > 0) {
1864                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1865                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1866                         if (err < 0) {
1867                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1868                                 usb_kill_anchored_urbs(&data->isoc_anchor);
1869                                 return;
1870                         }
1871
1872                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1873                 }
1874
1875                 if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_CVSD) {
1876                         if (hdev->voice_setting & 0x0020) {
1877                                 static const int alts[3] = { 2, 4, 5 };
1878
1879                                 new_alts = alts[data->sco_num - 1];
1880                         } else {
1881                                 new_alts = data->sco_num;
1882                         }
1883                 } else if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_TRANSP) {
1884                         /* Bluetooth USB spec recommends alt 6 (63 bytes), but
1885                          * many adapters do not support it.  Alt 1 appears to
1886                          * work for all adapters that do not have alt 6, and
1887                          * which work with WBS at all.  Some devices prefer
1888                          * alt 3 (HCI payload >= 60 Bytes let air packet
1889                          * data satisfy 60 bytes), requiring
1890                          * MTU >= 3 (packets) * 25 (size) - 3 (headers) = 72
1891                          * see also Core spec 5, vol 4, B 2.1.1 & Table 2.1.
1892                          */
1893                         if (btusb_find_altsetting(data, 6))
1894                                 new_alts = 6;
1895                         else if (btusb_find_altsetting(data, 3) &&
1896                                  hdev->sco_mtu >= 72 &&
1897                                  test_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags))
1898                                 new_alts = 3;
1899                         else
1900                                 new_alts = 1;
1901                 }
1902
1903                 if (btusb_switch_alt_setting(hdev, new_alts) < 0)
1904                         bt_dev_err(hdev, "set USB alt:(%d) failed!", new_alts);
1905         } else {
1906                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1907                 usb_kill_anchored_urbs(&data->isoc_anchor);
1908
1909                 __set_isoc_interface(hdev, 0);
1910                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1911                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1912         }
1913 }
1914
1915 static void btusb_waker(struct work_struct *work)
1916 {
1917         struct btusb_data *data = container_of(work, struct btusb_data, waker);
1918         int err;
1919
1920         err = usb_autopm_get_interface(data->intf);
1921         if (err < 0)
1922                 return;
1923
1924         usb_autopm_put_interface(data->intf);
1925 }
1926
1927 static void btusb_rx_work(struct work_struct *work)
1928 {
1929         struct btusb_data *data = container_of(work, struct btusb_data,
1930                                                rx_work.work);
1931         struct sk_buff *skb;
1932
1933         /* Dequeue ACL data received during the interval */
1934         while ((skb = skb_dequeue(&data->acl_q)))
1935                 data->recv_acl(data->hdev, skb);
1936 }
1937
1938 static int btusb_setup_bcm92035(struct hci_dev *hdev)
1939 {
1940         struct sk_buff *skb;
1941         u8 val = 0x00;
1942
1943         BT_DBG("%s", hdev->name);
1944
1945         skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
1946         if (IS_ERR(skb))
1947                 bt_dev_err(hdev, "BCM92035 command failed (%ld)", PTR_ERR(skb));
1948         else
1949                 kfree_skb(skb);
1950
1951         return 0;
1952 }
1953
1954 static int btusb_setup_csr(struct hci_dev *hdev)
1955 {
1956         struct btusb_data *data = hci_get_drvdata(hdev);
1957         u16 bcdDevice = le16_to_cpu(data->udev->descriptor.bcdDevice);
1958         struct hci_rp_read_local_version *rp;
1959         struct sk_buff *skb;
1960         bool is_fake = false;
1961         int ret;
1962
1963         BT_DBG("%s", hdev->name);
1964
1965         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
1966                              HCI_INIT_TIMEOUT);
1967         if (IS_ERR(skb)) {
1968                 int err = PTR_ERR(skb);
1969                 bt_dev_err(hdev, "CSR: Local version failed (%d)", err);
1970                 return err;
1971         }
1972
1973         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
1974                 bt_dev_err(hdev, "CSR: Local version length mismatch");
1975                 kfree_skb(skb);
1976                 return -EIO;
1977         }
1978
1979         rp = (struct hci_rp_read_local_version *)skb->data;
1980
1981         /* Detect a wide host of Chinese controllers that aren't CSR.
1982          *
1983          * Known fake bcdDevices: 0x0100, 0x0134, 0x1915, 0x2520, 0x7558, 0x8891
1984          *
1985          * The main thing they have in common is that these are really popular low-cost
1986          * options that support newer Bluetooth versions but rely on heavy VID/PID
1987          * squatting of this poor old Bluetooth 1.1 device. Even sold as such.
1988          *
1989          * We detect actual CSR devices by checking that the HCI manufacturer code
1990          * is Cambridge Silicon Radio (10) and ensuring that LMP sub-version and
1991          * HCI rev values always match. As they both store the firmware number.
1992          */
1993         if (le16_to_cpu(rp->manufacturer) != 10 ||
1994             le16_to_cpu(rp->hci_rev) != le16_to_cpu(rp->lmp_subver))
1995                 is_fake = true;
1996
1997         /* Known legit CSR firmware build numbers and their supported BT versions:
1998          * - 1.1 (0x1) -> 0x0073, 0x020d, 0x033c, 0x034e
1999          * - 1.2 (0x2) ->                 0x04d9, 0x0529
2000          * - 2.0 (0x3) ->         0x07a6, 0x07ad, 0x0c5c
2001          * - 2.1 (0x4) ->         0x149c, 0x1735, 0x1899 (0x1899 is a BlueCore4-External)
2002          * - 4.0 (0x6) ->         0x1d86, 0x2031, 0x22bb
2003          *
2004          * e.g. Real CSR dongles with LMP subversion 0x73 are old enough that
2005          *      support BT 1.1 only; so it's a dead giveaway when some
2006          *      third-party BT 4.0 dongle reuses it.
2007          */
2008         else if (le16_to_cpu(rp->lmp_subver) <= 0x034e &&
2009                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_1)
2010                 is_fake = true;
2011
2012         else if (le16_to_cpu(rp->lmp_subver) <= 0x0529 &&
2013                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_2)
2014                 is_fake = true;
2015
2016         else if (le16_to_cpu(rp->lmp_subver) <= 0x0c5c &&
2017                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_0)
2018                 is_fake = true;
2019
2020         else if (le16_to_cpu(rp->lmp_subver) <= 0x1899 &&
2021                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_1)
2022                 is_fake = true;
2023
2024         else if (le16_to_cpu(rp->lmp_subver) <= 0x22bb &&
2025                  le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_4_0)
2026                 is_fake = true;
2027
2028         /* Other clones which beat all the above checks */
2029         else if (bcdDevice == 0x0134 &&
2030                  le16_to_cpu(rp->lmp_subver) == 0x0c5c &&
2031                  le16_to_cpu(rp->hci_ver) == BLUETOOTH_VER_2_0)
2032                 is_fake = true;
2033
2034         if (is_fake) {
2035                 bt_dev_warn(hdev, "CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once...");
2036
2037                 /* Generally these clones have big discrepancies between
2038                  * advertised features and what's actually supported.
2039                  * Probably will need to be expanded in the future;
2040                  * without these the controller will lock up.
2041                  */
2042                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
2043                 set_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks);
2044
2045                 /* Clear the reset quirk since this is not an actual
2046                  * early Bluetooth 1.1 device from CSR.
2047                  */
2048                 clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2049                 clear_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2050
2051                 /*
2052                  * Special workaround for these BT 4.0 chip clones, and potentially more:
2053                  *
2054                  * - 0x0134: a Barrot 8041a02                 (HCI rev: 0x1012 sub: 0x0810)
2055                  * - 0x7558: IC markings FR3191AHAL 749H15143 (HCI rev/sub-version: 0x0709)
2056                  *
2057                  * These controllers are really messed-up.
2058                  *
2059                  * 1. Their bulk RX endpoint will never report any data unless
2060                  * the device was suspended at least once (yes, really).
2061                  * 2. They will not wakeup when autosuspended and receiving data
2062                  * on their bulk RX endpoint from e.g. a keyboard or mouse
2063                  * (IOW remote-wakeup support is broken for the bulk endpoint).
2064                  *
2065                  * To fix 1. enable runtime-suspend, force-suspend the
2066                  * HCI and then wake-it up by disabling runtime-suspend.
2067                  *
2068                  * To fix 2. clear the HCI's can_wake flag, this way the HCI
2069                  * will still be autosuspended when it is not open.
2070                  *
2071                  * --
2072                  *
2073                  * Because these are widespread problems we prefer generic solutions; so
2074                  * apply this initialization quirk to every controller that gets here,
2075                  * it should be harmless. The alternative is to not work at all.
2076                  */
2077                 pm_runtime_allow(&data->udev->dev);
2078
2079                 ret = pm_runtime_suspend(&data->udev->dev);
2080                 if (ret >= 0)
2081                         msleep(200);
2082                 else
2083                         bt_dev_err(hdev, "CSR: Failed to suspend the device for our Barrot 8041a02 receive-issue workaround");
2084
2085                 pm_runtime_forbid(&data->udev->dev);
2086
2087                 device_set_wakeup_capable(&data->udev->dev, false);
2088
2089                 /* Re-enable autosuspend if this was requested */
2090                 if (enable_autosuspend)
2091                         usb_enable_autosuspend(data->udev);
2092         }
2093
2094         kfree_skb(skb);
2095
2096         return 0;
2097 }
2098
2099 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
2100 {
2101         struct sk_buff *skb;
2102         struct hci_event_hdr *hdr;
2103         struct hci_ev_cmd_complete *evt;
2104
2105         skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
2106         if (!skb)
2107                 return -ENOMEM;
2108
2109         hdr = skb_put(skb, sizeof(*hdr));
2110         hdr->evt = HCI_EV_CMD_COMPLETE;
2111         hdr->plen = sizeof(*evt) + 1;
2112
2113         evt = skb_put(skb, sizeof(*evt));
2114         evt->ncmd = 0x01;
2115         evt->opcode = cpu_to_le16(opcode);
2116
2117         skb_put_u8(skb, 0x00);
2118
2119         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2120
2121         return hci_recv_frame(hdev, skb);
2122 }
2123
2124 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
2125                                  int count)
2126 {
2127         struct hci_dev *hdev = data->hdev;
2128
2129         /* When the device is in bootloader mode, then it can send
2130          * events via the bulk endpoint. These events are treated the
2131          * same way as the ones received from the interrupt endpoint.
2132          */
2133         if (btintel_test_flag(hdev, INTEL_BOOTLOADER))
2134                 return btusb_recv_intr(data, buffer, count);
2135
2136         return btusb_recv_bulk(data, buffer, count);
2137 }
2138
2139 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
2140 {
2141         if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
2142                 struct hci_event_hdr *hdr = (void *)skb->data;
2143
2144                 if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
2145                     hdr->plen > 0) {
2146                         const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
2147                         unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
2148
2149                         switch (skb->data[2]) {
2150                         case 0x02:
2151                                 /* When switching to the operational firmware
2152                                  * the device sends a vendor specific event
2153                                  * indicating that the bootup completed.
2154                                  */
2155                                 btintel_bootup(hdev, ptr, len);
2156                                 break;
2157                         case 0x06:
2158                                 /* When the firmware loading completes the
2159                                  * device sends out a vendor specific event
2160                                  * indicating the result of the firmware
2161                                  * loading.
2162                                  */
2163                                 btintel_secure_send_result(hdev, ptr, len);
2164                                 break;
2165                         }
2166                 }
2167         }
2168
2169         return hci_recv_frame(hdev, skb);
2170 }
2171
2172 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
2173 {
2174         struct urb *urb;
2175
2176         BT_DBG("%s", hdev->name);
2177
2178         switch (hci_skb_pkt_type(skb)) {
2179         case HCI_COMMAND_PKT:
2180                 if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
2181                         struct hci_command_hdr *cmd = (void *)skb->data;
2182                         __u16 opcode = le16_to_cpu(cmd->opcode);
2183
2184                         /* When in bootloader mode and the command 0xfc09
2185                          * is received, it needs to be send down the
2186                          * bulk endpoint. So allocate a bulk URB instead.
2187                          */
2188                         if (opcode == 0xfc09)
2189                                 urb = alloc_bulk_urb(hdev, skb);
2190                         else
2191                                 urb = alloc_ctrl_urb(hdev, skb);
2192
2193                         /* When the 0xfc01 command is issued to boot into
2194                          * the operational firmware, it will actually not
2195                          * send a command complete event. To keep the flow
2196                          * control working inject that event here.
2197                          */
2198                         if (opcode == 0xfc01)
2199                                 inject_cmd_complete(hdev, opcode);
2200                 } else {
2201                         urb = alloc_ctrl_urb(hdev, skb);
2202                 }
2203                 if (IS_ERR(urb))
2204                         return PTR_ERR(urb);
2205
2206                 hdev->stat.cmd_tx++;
2207                 return submit_or_queue_tx_urb(hdev, urb);
2208
2209         case HCI_ACLDATA_PKT:
2210                 urb = alloc_bulk_urb(hdev, skb);
2211                 if (IS_ERR(urb))
2212                         return PTR_ERR(urb);
2213
2214                 hdev->stat.acl_tx++;
2215                 return submit_or_queue_tx_urb(hdev, urb);
2216
2217         case HCI_SCODATA_PKT:
2218                 if (hci_conn_num(hdev, SCO_LINK) < 1)
2219                         return -ENODEV;
2220
2221                 urb = alloc_isoc_urb(hdev, skb);
2222                 if (IS_ERR(urb))
2223                         return PTR_ERR(urb);
2224
2225                 hdev->stat.sco_tx++;
2226                 return submit_tx_urb(hdev, urb);
2227         }
2228
2229         return -EILSEQ;
2230 }
2231
2232 /* UHW CR mapping */
2233 #define MTK_BT_MISC             0x70002510
2234 #define MTK_BT_SUBSYS_RST       0x70002610
2235 #define MTK_UDMA_INT_STA_BT     0x74000024
2236 #define MTK_UDMA_INT_STA_BT1    0x74000308
2237 #define MTK_BT_WDT_STATUS       0x740003A0
2238 #define MTK_EP_RST_OPT          0x74011890
2239 #define MTK_EP_RST_IN_OUT_OPT   0x00010001
2240 #define MTK_BT_RST_DONE         0x00000100
2241 #define MTK_BT_RESET_WAIT_MS    100
2242 #define MTK_BT_RESET_NUM_TRIES  10
2243
2244 static void btusb_mtk_wmt_recv(struct urb *urb)
2245 {
2246         struct hci_dev *hdev = urb->context;
2247         struct btusb_data *data = hci_get_drvdata(hdev);
2248         struct hci_event_hdr *hdr;
2249         struct sk_buff *skb;
2250         int err;
2251
2252         if (urb->status == 0 && urb->actual_length > 0) {
2253                 hdev->stat.byte_rx += urb->actual_length;
2254
2255                 /* WMT event shouldn't be fragmented and the size should be
2256                  * less than HCI_WMT_MAX_EVENT_SIZE.
2257                  */
2258                 skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
2259                 if (!skb) {
2260                         hdev->stat.err_rx++;
2261                         kfree(urb->setup_packet);
2262                         return;
2263                 }
2264
2265                 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2266                 skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
2267
2268                 hdr = (void *)skb->data;
2269                 /* Fix up the vendor event id with 0xff for vendor specific
2270                  * instead of 0xe4 so that event send via monitoring socket can
2271                  * be parsed properly.
2272                  */
2273                 hdr->evt = 0xff;
2274
2275                 /* When someone waits for the WMT event, the skb is being cloned
2276                  * and being processed the events from there then.
2277                  */
2278                 if (test_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags)) {
2279                         data->evt_skb = skb_clone(skb, GFP_ATOMIC);
2280                         if (!data->evt_skb) {
2281                                 kfree_skb(skb);
2282                                 kfree(urb->setup_packet);
2283                                 return;
2284                         }
2285                 }
2286
2287                 err = hci_recv_frame(hdev, skb);
2288                 if (err < 0) {
2289                         kfree_skb(data->evt_skb);
2290                         data->evt_skb = NULL;
2291                         kfree(urb->setup_packet);
2292                         return;
2293                 }
2294
2295                 if (test_and_clear_bit(BTUSB_TX_WAIT_VND_EVT,
2296                                        &data->flags)) {
2297                         /* Barrier to sync with other CPUs */
2298                         smp_mb__after_atomic();
2299                         wake_up_bit(&data->flags,
2300                                     BTUSB_TX_WAIT_VND_EVT);
2301                 }
2302                 kfree(urb->setup_packet);
2303                 return;
2304         } else if (urb->status == -ENOENT) {
2305                 /* Avoid suspend failed when usb_kill_urb */
2306                 return;
2307         }
2308
2309         usb_mark_last_busy(data->udev);
2310
2311         /* The URB complete handler is still called with urb->actual_length = 0
2312          * when the event is not available, so we should keep re-submitting
2313          * URB until WMT event returns, Also, It's necessary to wait some time
2314          * between the two consecutive control URBs to relax the target device
2315          * to generate the event. Otherwise, the WMT event cannot return from
2316          * the device successfully.
2317          */
2318         udelay(500);
2319
2320         usb_anchor_urb(urb, &data->ctrl_anchor);
2321         err = usb_submit_urb(urb, GFP_ATOMIC);
2322         if (err < 0) {
2323                 kfree(urb->setup_packet);
2324                 /* -EPERM: urb is being killed;
2325                  * -ENODEV: device got disconnected
2326                  */
2327                 if (err != -EPERM && err != -ENODEV)
2328                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
2329                                    urb, -err);
2330                 usb_unanchor_urb(urb);
2331         }
2332 }
2333
2334 static int btusb_mtk_submit_wmt_recv_urb(struct hci_dev *hdev)
2335 {
2336         struct btusb_data *data = hci_get_drvdata(hdev);
2337         struct usb_ctrlrequest *dr;
2338         unsigned char *buf;
2339         int err, size = 64;
2340         unsigned int pipe;
2341         struct urb *urb;
2342
2343         urb = usb_alloc_urb(0, GFP_KERNEL);
2344         if (!urb)
2345                 return -ENOMEM;
2346
2347         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
2348         if (!dr) {
2349                 usb_free_urb(urb);
2350                 return -ENOMEM;
2351         }
2352
2353         dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
2354         dr->bRequest     = 1;
2355         dr->wIndex       = cpu_to_le16(0);
2356         dr->wValue       = cpu_to_le16(48);
2357         dr->wLength      = cpu_to_le16(size);
2358
2359         buf = kmalloc(size, GFP_KERNEL);
2360         if (!buf) {
2361                 kfree(dr);
2362                 usb_free_urb(urb);
2363                 return -ENOMEM;
2364         }
2365
2366         pipe = usb_rcvctrlpipe(data->udev, 0);
2367
2368         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
2369                              buf, size, btusb_mtk_wmt_recv, hdev);
2370
2371         urb->transfer_flags |= URB_FREE_BUFFER;
2372
2373         usb_anchor_urb(urb, &data->ctrl_anchor);
2374         err = usb_submit_urb(urb, GFP_KERNEL);
2375         if (err < 0) {
2376                 if (err != -EPERM && err != -ENODEV)
2377                         bt_dev_err(hdev, "urb %p submission failed (%d)",
2378                                    urb, -err);
2379                 usb_unanchor_urb(urb);
2380         }
2381
2382         usb_free_urb(urb);
2383
2384         return err;
2385 }
2386
2387 static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
2388                                   struct btmtk_hci_wmt_params *wmt_params)
2389 {
2390         struct btusb_data *data = hci_get_drvdata(hdev);
2391         struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
2392         u32 hlen, status = BTMTK_WMT_INVALID;
2393         struct btmtk_hci_wmt_evt *wmt_evt;
2394         struct btmtk_hci_wmt_cmd *wc;
2395         struct btmtk_wmt_hdr *hdr;
2396         int err;
2397
2398         /* Send the WMT command and wait until the WMT event returns */
2399         hlen = sizeof(*hdr) + wmt_params->dlen;
2400         if (hlen > 255)
2401                 return -EINVAL;
2402
2403         wc = kzalloc(hlen, GFP_KERNEL);
2404         if (!wc)
2405                 return -ENOMEM;
2406
2407         hdr = &wc->hdr;
2408         hdr->dir = 1;
2409         hdr->op = wmt_params->op;
2410         hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
2411         hdr->flag = wmt_params->flag;
2412         memcpy(wc->data, wmt_params->data, wmt_params->dlen);
2413
2414         set_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2415
2416         err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
2417
2418         if (err < 0) {
2419                 clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2420                 goto err_free_wc;
2421         }
2422
2423         /* Submit control IN URB on demand to process the WMT event */
2424         err = btusb_mtk_submit_wmt_recv_urb(hdev);
2425         if (err < 0)
2426                 goto err_free_wc;
2427
2428         /* The vendor specific WMT commands are all answered by a vendor
2429          * specific event and will have the Command Status or Command
2430          * Complete as with usual HCI command flow control.
2431          *
2432          * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
2433          * state to be cleared. The driver specific event receive routine
2434          * will clear that state and with that indicate completion of the
2435          * WMT command.
2436          */
2437         err = wait_on_bit_timeout(&data->flags, BTUSB_TX_WAIT_VND_EVT,
2438                                   TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
2439         if (err == -EINTR) {
2440                 bt_dev_err(hdev, "Execution of wmt command interrupted");
2441                 clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2442                 goto err_free_wc;
2443         }
2444
2445         if (err) {
2446                 bt_dev_err(hdev, "Execution of wmt command timed out");
2447                 clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2448                 err = -ETIMEDOUT;
2449                 goto err_free_wc;
2450         }
2451
2452         /* Parse and handle the return WMT event */
2453         wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
2454         if (wmt_evt->whdr.op != hdr->op) {
2455                 bt_dev_err(hdev, "Wrong op received %d expected %d",
2456                            wmt_evt->whdr.op, hdr->op);
2457                 err = -EIO;
2458                 goto err_free_skb;
2459         }
2460
2461         switch (wmt_evt->whdr.op) {
2462         case BTMTK_WMT_SEMAPHORE:
2463                 if (wmt_evt->whdr.flag == 2)
2464                         status = BTMTK_WMT_PATCH_UNDONE;
2465                 else
2466                         status = BTMTK_WMT_PATCH_DONE;
2467                 break;
2468         case BTMTK_WMT_FUNC_CTRL:
2469                 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
2470                 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
2471                         status = BTMTK_WMT_ON_DONE;
2472                 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
2473                         status = BTMTK_WMT_ON_PROGRESS;
2474                 else
2475                         status = BTMTK_WMT_ON_UNDONE;
2476                 break;
2477         case BTMTK_WMT_PATCH_DWNLD:
2478                 if (wmt_evt->whdr.flag == 2)
2479                         status = BTMTK_WMT_PATCH_DONE;
2480                 else if (wmt_evt->whdr.flag == 1)
2481                         status = BTMTK_WMT_PATCH_PROGRESS;
2482                 else
2483                         status = BTMTK_WMT_PATCH_UNDONE;
2484                 break;
2485         }
2486
2487         if (wmt_params->status)
2488                 *wmt_params->status = status;
2489
2490 err_free_skb:
2491         kfree_skb(data->evt_skb);
2492         data->evt_skb = NULL;
2493 err_free_wc:
2494         kfree(wc);
2495         return err;
2496 }
2497
2498 static int btusb_mtk_func_query(struct hci_dev *hdev)
2499 {
2500         struct btmtk_hci_wmt_params wmt_params;
2501         int status, err;
2502         u8 param = 0;
2503
2504         /* Query whether the function is enabled */
2505         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2506         wmt_params.flag = 4;
2507         wmt_params.dlen = sizeof(param);
2508         wmt_params.data = &param;
2509         wmt_params.status = &status;
2510
2511         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2512         if (err < 0) {
2513                 bt_dev_err(hdev, "Failed to query function status (%d)", err);
2514                 return err;
2515         }
2516
2517         return status;
2518 }
2519
2520 static int btusb_mtk_uhw_reg_write(struct btusb_data *data, u32 reg, u32 val)
2521 {
2522         struct hci_dev *hdev = data->hdev;
2523         int pipe, err;
2524         void *buf;
2525
2526         buf = kzalloc(4, GFP_KERNEL);
2527         if (!buf)
2528                 return -ENOMEM;
2529
2530         put_unaligned_le32(val, buf);
2531
2532         pipe = usb_sndctrlpipe(data->udev, 0);
2533         err = usb_control_msg(data->udev, pipe, 0x02,
2534                               0x5E,
2535                               reg >> 16, reg & 0xffff,
2536                               buf, 4, USB_CTRL_SET_TIMEOUT);
2537         if (err < 0) {
2538                 bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
2539                 goto err_free_buf;
2540         }
2541
2542 err_free_buf:
2543         kfree(buf);
2544
2545         return err;
2546 }
2547
2548 static int btusb_mtk_uhw_reg_read(struct btusb_data *data, u32 reg, u32 *val)
2549 {
2550         struct hci_dev *hdev = data->hdev;
2551         int pipe, err;
2552         void *buf;
2553
2554         buf = kzalloc(4, GFP_KERNEL);
2555         if (!buf)
2556                 return -ENOMEM;
2557
2558         pipe = usb_rcvctrlpipe(data->udev, 0);
2559         err = usb_control_msg(data->udev, pipe, 0x01,
2560                               0xDE,
2561                               reg >> 16, reg & 0xffff,
2562                               buf, 4, USB_CTRL_SET_TIMEOUT);
2563         if (err < 0) {
2564                 bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
2565                 goto err_free_buf;
2566         }
2567
2568         *val = get_unaligned_le32(buf);
2569         bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
2570
2571 err_free_buf:
2572         kfree(buf);
2573
2574         return err;
2575 }
2576
2577 static int btusb_mtk_reg_read(struct btusb_data *data, u32 reg, u32 *val)
2578 {
2579         int pipe, err, size = sizeof(u32);
2580         void *buf;
2581
2582         buf = kzalloc(size, GFP_KERNEL);
2583         if (!buf)
2584                 return -ENOMEM;
2585
2586         pipe = usb_rcvctrlpipe(data->udev, 0);
2587         err = usb_control_msg(data->udev, pipe, 0x63,
2588                               USB_TYPE_VENDOR | USB_DIR_IN,
2589                               reg >> 16, reg & 0xffff,
2590                               buf, size, USB_CTRL_SET_TIMEOUT);
2591         if (err < 0)
2592                 goto err_free_buf;
2593
2594         *val = get_unaligned_le32(buf);
2595
2596 err_free_buf:
2597         kfree(buf);
2598
2599         return err;
2600 }
2601
2602 static int btusb_mtk_id_get(struct btusb_data *data, u32 reg, u32 *id)
2603 {
2604         return btusb_mtk_reg_read(data, reg, id);
2605 }
2606
2607 static int btusb_mtk_setup(struct hci_dev *hdev)
2608 {
2609         struct btusb_data *data = hci_get_drvdata(hdev);
2610         struct btmtk_hci_wmt_params wmt_params;
2611         ktime_t calltime, delta, rettime;
2612         struct btmtk_tci_sleep tci_sleep;
2613         unsigned long long duration;
2614         struct sk_buff *skb;
2615         const char *fwname;
2616         int err, status;
2617         u32 dev_id;
2618         char fw_bin_name[64];
2619         u32 fw_version = 0;
2620         u8 param;
2621
2622         calltime = ktime_get();
2623
2624         err = btusb_mtk_id_get(data, 0x80000008, &dev_id);
2625         if (err < 0) {
2626                 bt_dev_err(hdev, "Failed to get device id (%d)", err);
2627                 return err;
2628         }
2629
2630         if (!dev_id) {
2631                 err = btusb_mtk_id_get(data, 0x70010200, &dev_id);
2632                 if (err < 0) {
2633                         bt_dev_err(hdev, "Failed to get device id (%d)", err);
2634                         return err;
2635                 }
2636                 err = btusb_mtk_id_get(data, 0x80021004, &fw_version);
2637                 if (err < 0) {
2638                         bt_dev_err(hdev, "Failed to get fw version (%d)", err);
2639                         return err;
2640                 }
2641         }
2642
2643         switch (dev_id) {
2644         case 0x7663:
2645                 fwname = FIRMWARE_MT7663;
2646                 break;
2647         case 0x7668:
2648                 fwname = FIRMWARE_MT7668;
2649                 break;
2650         case 0x7922:
2651         case 0x7961:
2652                 snprintf(fw_bin_name, sizeof(fw_bin_name),
2653                         "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
2654                          dev_id & 0xffff, (fw_version & 0xff) + 1);
2655                 err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
2656                                                 btusb_mtk_hci_wmt_sync);
2657                 if (err < 0) {
2658                         bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
2659                         return err;
2660                 }
2661
2662                 /* It's Device EndPoint Reset Option Register */
2663                 btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
2664
2665                 /* Enable Bluetooth protocol */
2666                 param = 1;
2667                 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2668                 wmt_params.flag = 0;
2669                 wmt_params.dlen = sizeof(param);
2670                 wmt_params.data = &param;
2671                 wmt_params.status = NULL;
2672
2673                 err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2674                 if (err < 0) {
2675                         bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
2676                         return err;
2677                 }
2678
2679                 hci_set_msft_opcode(hdev, 0xFD30);
2680                 hci_set_aosp_capable(hdev);
2681                 goto done;
2682         default:
2683                 bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
2684                            dev_id);
2685                 return -ENODEV;
2686         }
2687
2688         /* Query whether the firmware is already download */
2689         wmt_params.op = BTMTK_WMT_SEMAPHORE;
2690         wmt_params.flag = 1;
2691         wmt_params.dlen = 0;
2692         wmt_params.data = NULL;
2693         wmt_params.status = &status;
2694
2695         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2696         if (err < 0) {
2697                 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
2698                 return err;
2699         }
2700
2701         if (status == BTMTK_WMT_PATCH_DONE) {
2702                 bt_dev_info(hdev, "firmware already downloaded");
2703                 goto ignore_setup_fw;
2704         }
2705
2706         /* Setup a firmware which the device definitely requires */
2707         err = btmtk_setup_firmware(hdev, fwname,
2708                                    btusb_mtk_hci_wmt_sync);
2709         if (err < 0)
2710                 return err;
2711
2712 ignore_setup_fw:
2713         err = readx_poll_timeout(btusb_mtk_func_query, hdev, status,
2714                                  status < 0 || status != BTMTK_WMT_ON_PROGRESS,
2715                                  2000, 5000000);
2716         /* -ETIMEDOUT happens */
2717         if (err < 0)
2718                 return err;
2719
2720         /* The other errors happen in btusb_mtk_func_query */
2721         if (status < 0)
2722                 return status;
2723
2724         if (status == BTMTK_WMT_ON_DONE) {
2725                 bt_dev_info(hdev, "function already on");
2726                 goto ignore_func_on;
2727         }
2728
2729         /* Enable Bluetooth protocol */
2730         param = 1;
2731         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2732         wmt_params.flag = 0;
2733         wmt_params.dlen = sizeof(param);
2734         wmt_params.data = &param;
2735         wmt_params.status = NULL;
2736
2737         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2738         if (err < 0) {
2739                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
2740                 return err;
2741         }
2742
2743 ignore_func_on:
2744         /* Apply the low power environment setup */
2745         tci_sleep.mode = 0x5;
2746         tci_sleep.duration = cpu_to_le16(0x640);
2747         tci_sleep.host_duration = cpu_to_le16(0x640);
2748         tci_sleep.host_wakeup_pin = 0;
2749         tci_sleep.time_compensation = 0;
2750
2751         skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
2752                              HCI_INIT_TIMEOUT);
2753         if (IS_ERR(skb)) {
2754                 err = PTR_ERR(skb);
2755                 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
2756                 return err;
2757         }
2758         kfree_skb(skb);
2759
2760 done:
2761         rettime = ktime_get();
2762         delta = ktime_sub(rettime, calltime);
2763         duration = (unsigned long long)ktime_to_ns(delta) >> 10;
2764
2765         bt_dev_info(hdev, "Device setup in %llu usecs", duration);
2766
2767         return 0;
2768 }
2769
2770 static int btusb_mtk_shutdown(struct hci_dev *hdev)
2771 {
2772         struct btmtk_hci_wmt_params wmt_params;
2773         u8 param = 0;
2774         int err;
2775
2776         /* Disable the device */
2777         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2778         wmt_params.flag = 0;
2779         wmt_params.dlen = sizeof(param);
2780         wmt_params.data = &param;
2781         wmt_params.status = NULL;
2782
2783         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2784         if (err < 0) {
2785                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
2786                 return err;
2787         }
2788
2789         return 0;
2790 }
2791
2792 static void btusb_mtk_cmd_timeout(struct hci_dev *hdev)
2793 {
2794         struct btusb_data *data = hci_get_drvdata(hdev);
2795         u32 val;
2796         int err, retry = 0;
2797
2798         /* It's MediaTek specific bluetooth reset mechanism via USB */
2799         if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
2800                 bt_dev_err(hdev, "last reset failed? Not resetting again");
2801                 return;
2802         }
2803
2804         err = usb_autopm_get_interface(data->intf);
2805         if (err < 0)
2806                 return;
2807
2808         btusb_stop_traffic(data);
2809         usb_kill_anchored_urbs(&data->tx_anchor);
2810
2811         /* It's Device EndPoint Reset Option Register */
2812         bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
2813         btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
2814         btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val);
2815
2816         /* Reset the bluetooth chip via USB interface. */
2817         btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1);
2818         btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
2819         btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
2820         btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
2821         btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
2822         /* MT7921 need to delay 20ms between toggle reset bit */
2823         msleep(20);
2824         btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
2825         btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
2826
2827         /* Poll the register until reset is completed */
2828         do {
2829                 btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val);
2830                 if (val & MTK_BT_RST_DONE) {
2831                         bt_dev_dbg(hdev, "Bluetooth Reset Successfully");
2832                         break;
2833                 }
2834
2835                 bt_dev_dbg(hdev, "Polling Bluetooth Reset CR");
2836                 retry++;
2837                 msleep(MTK_BT_RESET_WAIT_MS);
2838         } while (retry < MTK_BT_RESET_NUM_TRIES);
2839
2840         btusb_mtk_id_get(data, 0x70010200, &val);
2841         if (!val)
2842                 bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
2843
2844         usb_queue_reset_device(data->intf);
2845
2846         clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags);
2847 }
2848
2849 static int btusb_recv_acl_mtk(struct hci_dev *hdev, struct sk_buff *skb)
2850 {
2851         struct btusb_data *data = hci_get_drvdata(hdev);
2852         u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
2853
2854         switch (handle) {
2855         case 0xfc6f:            /* Firmware dump from device */
2856                 /* When the firmware hangs, the device can no longer
2857                  * suspend and thus disable auto-suspend.
2858                  */
2859                 usb_disable_autosuspend(data->udev);
2860                 fallthrough;
2861         case 0x05ff:            /* Firmware debug logging 1 */
2862         case 0x05fe:            /* Firmware debug logging 2 */
2863                 return hci_recv_diag(hdev, skb);
2864         }
2865
2866         return hci_recv_frame(hdev, skb);
2867 }
2868
2869 #ifdef CONFIG_PM
2870 /* Configure an out-of-band gpio as wake-up pin, if specified in device tree */
2871 static int marvell_config_oob_wake(struct hci_dev *hdev)
2872 {
2873         struct sk_buff *skb;
2874         struct btusb_data *data = hci_get_drvdata(hdev);
2875         struct device *dev = &data->udev->dev;
2876         u16 pin, gap, opcode;
2877         int ret;
2878         u8 cmd[5];
2879
2880         /* Move on if no wakeup pin specified */
2881         if (of_property_read_u16(dev->of_node, "marvell,wakeup-pin", &pin) ||
2882             of_property_read_u16(dev->of_node, "marvell,wakeup-gap-ms", &gap))
2883                 return 0;
2884
2885         /* Vendor specific command to configure a GPIO as wake-up pin */
2886         opcode = hci_opcode_pack(0x3F, 0x59);
2887         cmd[0] = opcode & 0xFF;
2888         cmd[1] = opcode >> 8;
2889         cmd[2] = 2; /* length of parameters that follow */
2890         cmd[3] = pin;
2891         cmd[4] = gap; /* time in ms, for which wakeup pin should be asserted */
2892
2893         skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
2894         if (!skb) {
2895                 bt_dev_err(hdev, "%s: No memory", __func__);
2896                 return -ENOMEM;
2897         }
2898
2899         skb_put_data(skb, cmd, sizeof(cmd));
2900         hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
2901
2902         ret = btusb_send_frame(hdev, skb);
2903         if (ret) {
2904                 bt_dev_err(hdev, "%s: configuration failed", __func__);
2905                 kfree_skb(skb);
2906                 return ret;
2907         }
2908
2909         return 0;
2910 }
2911 #endif
2912
2913 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
2914                                     const bdaddr_t *bdaddr)
2915 {
2916         struct sk_buff *skb;
2917         u8 buf[8];
2918         long ret;
2919
2920         buf[0] = 0xfe;
2921         buf[1] = sizeof(bdaddr_t);
2922         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
2923
2924         skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2925         if (IS_ERR(skb)) {
2926                 ret = PTR_ERR(skb);
2927                 bt_dev_err(hdev, "changing Marvell device address failed (%ld)",
2928                            ret);
2929                 return ret;
2930         }
2931         kfree_skb(skb);
2932
2933         return 0;
2934 }
2935
2936 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
2937                                     const bdaddr_t *bdaddr)
2938 {
2939         struct sk_buff *skb;
2940         u8 buf[10];
2941         long ret;
2942
2943         buf[0] = 0x01;
2944         buf[1] = 0x01;
2945         buf[2] = 0x00;
2946         buf[3] = sizeof(bdaddr_t);
2947         memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
2948
2949         skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2950         if (IS_ERR(skb)) {
2951                 ret = PTR_ERR(skb);
2952                 bt_dev_err(hdev, "Change address command failed (%ld)", ret);
2953                 return ret;
2954         }
2955         kfree_skb(skb);
2956
2957         return 0;
2958 }
2959
2960 static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev,
2961                                 const bdaddr_t *bdaddr)
2962 {
2963         struct sk_buff *skb;
2964         u8 buf[6];
2965         long ret;
2966
2967         memcpy(buf, bdaddr, sizeof(bdaddr_t));
2968
2969         skb = __hci_cmd_sync_ev(hdev, 0xfc14, sizeof(buf), buf,
2970                                 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
2971         if (IS_ERR(skb)) {
2972                 ret = PTR_ERR(skb);
2973                 bt_dev_err(hdev, "Change address command failed (%ld)", ret);
2974                 return ret;
2975         }
2976         kfree_skb(skb);
2977
2978         return 0;
2979 }
2980
2981 #define QCA_DFU_PACKET_LEN      4096
2982
2983 #define QCA_GET_TARGET_VERSION  0x09
2984 #define QCA_CHECK_STATUS        0x05
2985 #define QCA_DFU_DOWNLOAD        0x01
2986
2987 #define QCA_SYSCFG_UPDATED      0x40
2988 #define QCA_PATCH_UPDATED       0x80
2989 #define QCA_DFU_TIMEOUT         3000
2990 #define QCA_FLAG_MULTI_NVM      0x80
2991
2992 #define WCN6855_2_0_RAM_VERSION_GF 0x400c1200
2993 #define WCN6855_2_1_RAM_VERSION_GF 0x400c1211
2994
2995 struct qca_version {
2996         __le32  rom_version;
2997         __le32  patch_version;
2998         __le32  ram_version;
2999         __u8    chip_id;
3000         __u8    platform_id;
3001         __le16  flag;
3002         __u8    reserved[4];
3003 } __packed;
3004
3005 struct qca_rampatch_version {
3006         __le16  rom_version_high;
3007         __le16  rom_version_low;
3008         __le16  patch_version;
3009 } __packed;
3010
3011 struct qca_device_info {
3012         u32     rom_version;
3013         u8      rampatch_hdr;   /* length of header in rampatch */
3014         u8      nvm_hdr;        /* length of header in NVM */
3015         u8      ver_offset;     /* offset of version structure in rampatch */
3016 };
3017
3018 static const struct qca_device_info qca_devices_table[] = {
3019         { 0x00000100, 20, 4,  8 }, /* Rome 1.0 */
3020         { 0x00000101, 20, 4,  8 }, /* Rome 1.1 */
3021         { 0x00000200, 28, 4, 16 }, /* Rome 2.0 */
3022         { 0x00000201, 28, 4, 16 }, /* Rome 2.1 */
3023         { 0x00000300, 28, 4, 16 }, /* Rome 3.0 */
3024         { 0x00000302, 28, 4, 16 }, /* Rome 3.2 */
3025         { 0x00130100, 40, 4, 16 }, /* WCN6855 1.0 */
3026         { 0x00130200, 40, 4, 16 }, /* WCN6855 2.0 */
3027         { 0x00130201, 40, 4, 16 }, /* WCN6855 2.1 */
3028 };
3029
3030 static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 request,
3031                                      void *data, u16 size)
3032 {
3033         int pipe, err;
3034         u8 *buf;
3035
3036         buf = kmalloc(size, GFP_KERNEL);
3037         if (!buf)
3038                 return -ENOMEM;
3039
3040         /* Found some of USB hosts have IOT issues with ours so that we should
3041          * not wait until HCI layer is ready.
3042          */
3043         pipe = usb_rcvctrlpipe(udev, 0);
3044         err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
3045                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3046         if (err < 0) {
3047                 dev_err(&udev->dev, "Failed to access otp area (%d)", err);
3048                 goto done;
3049         }
3050
3051         memcpy(data, buf, size);
3052
3053 done:
3054         kfree(buf);
3055
3056         return err;
3057 }
3058
3059 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
3060                                        const struct firmware *firmware,
3061                                        size_t hdr_size)
3062 {
3063         struct btusb_data *btdata = hci_get_drvdata(hdev);
3064         struct usb_device *udev = btdata->udev;
3065         size_t count, size, sent = 0;
3066         int pipe, len, err;
3067         u8 *buf;
3068
3069         buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
3070         if (!buf)
3071                 return -ENOMEM;
3072
3073         count = firmware->size;
3074
3075         size = min_t(size_t, count, hdr_size);
3076         memcpy(buf, firmware->data, size);
3077
3078         /* USB patches should go down to controller through USB path
3079          * because binary format fits to go down through USB channel.
3080          * USB control path is for patching headers and USB bulk is for
3081          * patch body.
3082          */
3083         pipe = usb_sndctrlpipe(udev, 0);
3084         err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
3085                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3086         if (err < 0) {
3087                 bt_dev_err(hdev, "Failed to send headers (%d)", err);
3088                 goto done;
3089         }
3090
3091         sent += size;
3092         count -= size;
3093
3094         /* ep2 need time to switch from function acl to function dfu,
3095          * so we add 20ms delay here.
3096          */
3097         msleep(20);
3098
3099         while (count) {
3100                 size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
3101
3102                 memcpy(buf, firmware->data + sent, size);
3103
3104                 pipe = usb_sndbulkpipe(udev, 0x02);
3105                 err = usb_bulk_msg(udev, pipe, buf, size, &len,
3106                                    QCA_DFU_TIMEOUT);
3107                 if (err < 0) {
3108                         bt_dev_err(hdev, "Failed to send body at %zd of %zd (%d)",
3109                                    sent, firmware->size, err);
3110                         break;
3111                 }
3112
3113                 if (size != len) {
3114                         bt_dev_err(hdev, "Failed to get bulk buffer");
3115                         err = -EILSEQ;
3116                         break;
3117                 }
3118
3119                 sent  += size;
3120                 count -= size;
3121         }
3122
3123 done:
3124         kfree(buf);
3125         return err;
3126 }
3127
3128 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
3129                                          struct qca_version *ver,
3130                                          const struct qca_device_info *info)
3131 {
3132         struct qca_rampatch_version *rver;
3133         const struct firmware *fw;
3134         u32 ver_rom, ver_patch, rver_rom;
3135         u16 rver_rom_low, rver_rom_high, rver_patch;
3136         char fwname[64];
3137         int err;
3138
3139         ver_rom = le32_to_cpu(ver->rom_version);
3140         ver_patch = le32_to_cpu(ver->patch_version);
3141
3142         snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
3143
3144         err = request_firmware(&fw, fwname, &hdev->dev);
3145         if (err) {
3146                 bt_dev_err(hdev, "failed to request rampatch file: %s (%d)",
3147                            fwname, err);
3148                 return err;
3149         }
3150
3151         bt_dev_info(hdev, "using rampatch file: %s", fwname);
3152
3153         rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
3154         rver_rom_low = le16_to_cpu(rver->rom_version_low);
3155         rver_patch = le16_to_cpu(rver->patch_version);
3156
3157         if (ver_rom & ~0xffffU) {
3158                 rver_rom_high = le16_to_cpu(rver->rom_version_high);
3159                 rver_rom = le32_to_cpu(rver_rom_high << 16 | rver_rom_low);
3160         } else {
3161                 rver_rom = rver_rom_low;
3162         }
3163
3164         bt_dev_info(hdev, "QCA: patch rome 0x%x build 0x%x, "
3165                     "firmware rome 0x%x build 0x%x",
3166                     rver_rom, rver_patch, ver_rom, ver_patch);
3167
3168         if (rver_rom != ver_rom || rver_patch <= ver_patch) {
3169                 bt_dev_err(hdev, "rampatch file version did not match with firmware");
3170                 err = -EINVAL;
3171                 goto done;
3172         }
3173
3174         err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
3175
3176 done:
3177         release_firmware(fw);
3178
3179         return err;
3180 }
3181
3182 static void btusb_generate_qca_nvm_name(char *fwname, size_t max_size,
3183                                         const struct qca_version *ver)
3184 {
3185         u32 rom_version = le32_to_cpu(ver->rom_version);
3186         u16 flag = le16_to_cpu(ver->flag);
3187
3188         if (((flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) {
3189                 /* The board_id should be split into two bytes
3190                  * The 1st byte is chip ID, and the 2nd byte is platform ID
3191                  * For example, board ID 0x010A, 0x01 is platform ID. 0x0A is chip ID
3192                  * we have several platforms, and platform IDs are continuously added
3193                  * Platform ID:
3194                  * 0x00 is for Mobile
3195                  * 0x01 is for X86
3196                  * 0x02 is for Automotive
3197                  * 0x03 is for Consumer electronic
3198                  */
3199                 u16 board_id = (ver->chip_id << 8) + ver->platform_id;
3200                 const char *variant;
3201
3202                 switch (le32_to_cpu(ver->ram_version)) {
3203                 case WCN6855_2_0_RAM_VERSION_GF:
3204                 case WCN6855_2_1_RAM_VERSION_GF:
3205                         variant = "_gf";
3206                         break;
3207                 default:
3208                         variant = "";
3209                         break;
3210                 }
3211
3212                 if (board_id == 0) {
3213                         snprintf(fwname, max_size, "qca/nvm_usb_%08x%s.bin",
3214                                 rom_version, variant);
3215                 } else {
3216                         snprintf(fwname, max_size, "qca/nvm_usb_%08x%s_%04x.bin",
3217                                 rom_version, variant, board_id);
3218                 }
3219         } else {
3220                 snprintf(fwname, max_size, "qca/nvm_usb_%08x.bin",
3221                         rom_version);
3222         }
3223
3224 }
3225
3226 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
3227                                     struct qca_version *ver,
3228                                     const struct qca_device_info *info)
3229 {
3230         const struct firmware *fw;
3231         char fwname[64];
3232         int err;
3233
3234         btusb_generate_qca_nvm_name(fwname, sizeof(fwname), ver);
3235
3236         err = request_firmware(&fw, fwname, &hdev->dev);
3237         if (err) {
3238                 bt_dev_err(hdev, "failed to request NVM file: %s (%d)",
3239                            fwname, err);
3240                 return err;
3241         }
3242
3243         bt_dev_info(hdev, "using NVM file: %s", fwname);
3244
3245         err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
3246
3247         release_firmware(fw);
3248
3249         return err;
3250 }
3251
3252 /* identify the ROM version and check whether patches are needed */
3253 static bool btusb_qca_need_patch(struct usb_device *udev)
3254 {
3255         struct qca_version ver;
3256
3257         if (btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3258                                       sizeof(ver)) < 0)
3259                 return false;
3260         /* only low ROM versions need patches */
3261         return !(le32_to_cpu(ver.rom_version) & ~0xffffU);
3262 }
3263
3264 static int btusb_setup_qca(struct hci_dev *hdev)
3265 {
3266         struct btusb_data *btdata = hci_get_drvdata(hdev);
3267         struct usb_device *udev = btdata->udev;
3268         const struct qca_device_info *info = NULL;
3269         struct qca_version ver;
3270         u32 ver_rom;
3271         u8 status;
3272         int i, err;
3273
3274         err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3275                                         sizeof(ver));
3276         if (err < 0)
3277                 return err;
3278
3279         ver_rom = le32_to_cpu(ver.rom_version);
3280
3281         for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
3282                 if (ver_rom == qca_devices_table[i].rom_version)
3283                         info = &qca_devices_table[i];
3284         }
3285         if (!info) {
3286                 /* If the rom_version is not matched in the qca_devices_table
3287                  * and the high ROM version is not zero, we assume this chip no
3288                  * need to load the rampatch and nvm.
3289                  */
3290                 if (ver_rom & ~0xffffU)
3291                         return 0;
3292
3293                 bt_dev_err(hdev, "don't support firmware rome 0x%x", ver_rom);
3294                 return -ENODEV;
3295         }
3296
3297         err = btusb_qca_send_vendor_req(udev, QCA_CHECK_STATUS, &status,
3298                                         sizeof(status));
3299         if (err < 0)
3300                 return err;
3301
3302         if (!(status & QCA_PATCH_UPDATED)) {
3303                 err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
3304                 if (err < 0)
3305                         return err;
3306         }
3307
3308         err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3309                                         sizeof(ver));
3310         if (err < 0)
3311                 return err;
3312
3313         if (!(status & QCA_SYSCFG_UPDATED)) {
3314                 err = btusb_setup_qca_load_nvm(hdev, &ver, info);
3315                 if (err < 0)
3316                         return err;
3317         }
3318
3319         return 0;
3320 }
3321
3322 static inline int __set_diag_interface(struct hci_dev *hdev)
3323 {
3324         struct btusb_data *data = hci_get_drvdata(hdev);
3325         struct usb_interface *intf = data->diag;
3326         int i;
3327
3328         if (!data->diag)
3329                 return -ENODEV;
3330
3331         data->diag_tx_ep = NULL;
3332         data->diag_rx_ep = NULL;
3333
3334         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3335                 struct usb_endpoint_descriptor *ep_desc;
3336
3337                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3338
3339                 if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3340                         data->diag_tx_ep = ep_desc;
3341                         continue;
3342                 }
3343
3344                 if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3345                         data->diag_rx_ep = ep_desc;
3346                         continue;
3347                 }
3348         }
3349
3350         if (!data->diag_tx_ep || !data->diag_rx_ep) {
3351                 bt_dev_err(hdev, "invalid diagnostic descriptors");
3352                 return -ENODEV;
3353         }
3354
3355         return 0;
3356 }
3357
3358 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
3359 {
3360         struct btusb_data *data = hci_get_drvdata(hdev);
3361         struct sk_buff *skb;
3362         struct urb *urb;
3363         unsigned int pipe;
3364
3365         if (!data->diag_tx_ep)
3366                 return ERR_PTR(-ENODEV);
3367
3368         urb = usb_alloc_urb(0, GFP_KERNEL);
3369         if (!urb)
3370                 return ERR_PTR(-ENOMEM);
3371
3372         skb = bt_skb_alloc(2, GFP_KERNEL);
3373         if (!skb) {
3374                 usb_free_urb(urb);
3375                 return ERR_PTR(-ENOMEM);
3376         }
3377
3378         skb_put_u8(skb, 0xf0);
3379         skb_put_u8(skb, enable);
3380
3381         pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
3382
3383         usb_fill_bulk_urb(urb, data->udev, pipe,
3384                           skb->data, skb->len, btusb_tx_complete, skb);
3385
3386         skb->dev = (void *)hdev;
3387
3388         return urb;
3389 }
3390
3391 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
3392 {
3393         struct btusb_data *data = hci_get_drvdata(hdev);
3394         struct urb *urb;
3395
3396         if (!data->diag)
3397                 return -ENODEV;
3398
3399         if (!test_bit(HCI_RUNNING, &hdev->flags))
3400                 return -ENETDOWN;
3401
3402         urb = alloc_diag_urb(hdev, enable);
3403         if (IS_ERR(urb))
3404                 return PTR_ERR(urb);
3405
3406         return submit_or_queue_tx_urb(hdev, urb);
3407 }
3408
3409 #ifdef CONFIG_PM
3410 static irqreturn_t btusb_oob_wake_handler(int irq, void *priv)
3411 {
3412         struct btusb_data *data = priv;
3413
3414         pm_wakeup_event(&data->udev->dev, 0);
3415         pm_system_wakeup();
3416
3417         /* Disable only if not already disabled (keep it balanced) */
3418         if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
3419                 disable_irq_nosync(irq);
3420                 disable_irq_wake(irq);
3421         }
3422         return IRQ_HANDLED;
3423 }
3424
3425 static const struct of_device_id btusb_match_table[] = {
3426         { .compatible = "usb1286,204e" },
3427         { .compatible = "usbcf3,e300" }, /* QCA6174A */
3428         { .compatible = "usb4ca,301a" }, /* QCA6174A (Lite-On) */
3429         { }
3430 };
3431 MODULE_DEVICE_TABLE(of, btusb_match_table);
3432
3433 /* Use an oob wakeup pin? */
3434 static int btusb_config_oob_wake(struct hci_dev *hdev)
3435 {
3436         struct btusb_data *data = hci_get_drvdata(hdev);
3437         struct device *dev = &data->udev->dev;
3438         int irq, ret;
3439
3440         clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
3441
3442         if (!of_match_device(btusb_match_table, dev))
3443                 return 0;
3444
3445         /* Move on if no IRQ specified */
3446         irq = of_irq_get_byname(dev->of_node, "wakeup");
3447         if (irq <= 0) {
3448                 bt_dev_dbg(hdev, "%s: no OOB Wakeup IRQ in DT", __func__);
3449                 return 0;
3450         }
3451
3452         irq_set_status_flags(irq, IRQ_NOAUTOEN);
3453         ret = devm_request_irq(&hdev->dev, irq, btusb_oob_wake_handler,
3454                                0, "OOB Wake-on-BT", data);
3455         if (ret) {
3456                 bt_dev_err(hdev, "%s: IRQ request failed", __func__);
3457                 return ret;
3458         }
3459
3460         ret = device_init_wakeup(dev, true);
3461         if (ret) {
3462                 bt_dev_err(hdev, "%s: failed to init_wakeup", __func__);
3463                 return ret;
3464         }
3465
3466         data->oob_wake_irq = irq;
3467         bt_dev_info(hdev, "OOB Wake-on-BT configured at IRQ %u", irq);
3468         return 0;
3469 }
3470 #endif
3471
3472 static void btusb_check_needs_reset_resume(struct usb_interface *intf)
3473 {
3474         if (dmi_check_system(btusb_needs_reset_resume_table))
3475                 interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
3476 }
3477
3478 static bool btusb_wakeup(struct hci_dev *hdev)
3479 {
3480         struct btusb_data *data = hci_get_drvdata(hdev);
3481
3482         return device_may_wakeup(&data->udev->dev);
3483 }
3484
3485 static int btusb_shutdown_qca(struct hci_dev *hdev)
3486 {
3487         struct sk_buff *skb;
3488
3489         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
3490         if (IS_ERR(skb)) {
3491                 bt_dev_err(hdev, "HCI reset during shutdown failed");
3492                 return PTR_ERR(skb);
3493         }
3494         kfree_skb(skb);
3495
3496         return 0;
3497 }
3498
3499 static ssize_t force_poll_sync_read(struct file *file, char __user *user_buf,
3500                                     size_t count, loff_t *ppos)
3501 {
3502         struct btusb_data *data = file->private_data;
3503         char buf[3];
3504
3505         buf[0] = data->poll_sync ? 'Y' : 'N';
3506         buf[1] = '\n';
3507         buf[2] = '\0';
3508         return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
3509 }
3510
3511 static ssize_t force_poll_sync_write(struct file *file,
3512                                      const char __user *user_buf,
3513                                      size_t count, loff_t *ppos)
3514 {
3515         struct btusb_data *data = file->private_data;
3516         bool enable;
3517         int err;
3518
3519         err = kstrtobool_from_user(user_buf, count, &enable);
3520         if (err)
3521                 return err;
3522
3523         /* Only allow changes while the adapter is down */
3524         if (test_bit(HCI_UP, &data->hdev->flags))
3525                 return -EPERM;
3526
3527         if (data->poll_sync == enable)
3528                 return -EALREADY;
3529
3530         data->poll_sync = enable;
3531
3532         return count;
3533 }
3534
3535 static const struct file_operations force_poll_sync_fops = {
3536         .open           = simple_open,
3537         .read           = force_poll_sync_read,
3538         .write          = force_poll_sync_write,
3539         .llseek         = default_llseek,
3540 };
3541
3542 static int btusb_probe(struct usb_interface *intf,
3543                        const struct usb_device_id *id)
3544 {
3545         struct usb_endpoint_descriptor *ep_desc;
3546         struct gpio_desc *reset_gpio;
3547         struct btusb_data *data;
3548         struct hci_dev *hdev;
3549         unsigned ifnum_base;
3550         int i, err, priv_size;
3551
3552         BT_DBG("intf %p id %p", intf, id);
3553
3554         /* interface numbers are hardcoded in the spec */
3555         if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
3556                 if (!(id->driver_info & BTUSB_IFNUM_2))
3557                         return -ENODEV;
3558                 if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
3559                         return -ENODEV;
3560         }
3561
3562         ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
3563
3564         if (!id->driver_info) {
3565                 const struct usb_device_id *match;
3566
3567                 match = usb_match_id(intf, blacklist_table);
3568                 if (match)
3569                         id = match;
3570         }
3571
3572         if (id->driver_info == BTUSB_IGNORE)
3573                 return -ENODEV;
3574
3575         if (id->driver_info & BTUSB_ATH3012) {
3576                 struct usb_device *udev = interface_to_usbdev(intf);
3577
3578                 /* Old firmware would otherwise let ath3k driver load
3579                  * patch and sysconfig files
3580                  */
3581                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001 &&
3582                     !btusb_qca_need_patch(udev))
3583                         return -ENODEV;
3584         }
3585
3586         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
3587         if (!data)
3588                 return -ENOMEM;
3589
3590         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3591                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3592
3593                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
3594                         data->intr_ep = ep_desc;
3595                         continue;
3596                 }
3597
3598                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3599                         data->bulk_tx_ep = ep_desc;
3600                         continue;
3601                 }
3602
3603                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3604                         data->bulk_rx_ep = ep_desc;
3605                         continue;
3606                 }
3607         }
3608
3609         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
3610                 return -ENODEV;
3611
3612         if (id->driver_info & BTUSB_AMP) {
3613                 data->cmdreq_type = USB_TYPE_CLASS | 0x01;
3614                 data->cmdreq = 0x2b;
3615         } else {
3616                 data->cmdreq_type = USB_TYPE_CLASS;
3617                 data->cmdreq = 0x00;
3618         }
3619
3620         data->udev = interface_to_usbdev(intf);
3621         data->intf = intf;
3622
3623         INIT_WORK(&data->work, btusb_work);
3624         INIT_WORK(&data->waker, btusb_waker);
3625         INIT_DELAYED_WORK(&data->rx_work, btusb_rx_work);
3626
3627         skb_queue_head_init(&data->acl_q);
3628
3629         init_usb_anchor(&data->deferred);
3630         init_usb_anchor(&data->tx_anchor);
3631         spin_lock_init(&data->txlock);
3632
3633         init_usb_anchor(&data->intr_anchor);
3634         init_usb_anchor(&data->bulk_anchor);
3635         init_usb_anchor(&data->isoc_anchor);
3636         init_usb_anchor(&data->diag_anchor);
3637         init_usb_anchor(&data->ctrl_anchor);
3638         spin_lock_init(&data->rxlock);
3639
3640         priv_size = 0;
3641
3642         data->recv_event = hci_recv_frame;
3643         data->recv_bulk = btusb_recv_bulk;
3644
3645         if (id->driver_info & BTUSB_INTEL_COMBINED) {
3646                 /* Allocate extra space for Intel device */
3647                 priv_size += sizeof(struct btintel_data);
3648
3649                 /* Override the rx handlers */
3650                 data->recv_event = btusb_recv_event_intel;
3651                 data->recv_bulk = btusb_recv_bulk_intel;
3652         }
3653
3654         data->recv_acl = hci_recv_frame;
3655
3656         hdev = hci_alloc_dev_priv(priv_size);
3657         if (!hdev)
3658                 return -ENOMEM;
3659
3660         hdev->bus = HCI_USB;
3661         hci_set_drvdata(hdev, data);
3662
3663         if (id->driver_info & BTUSB_AMP)
3664                 hdev->dev_type = HCI_AMP;
3665         else
3666                 hdev->dev_type = HCI_PRIMARY;
3667
3668         data->hdev = hdev;
3669
3670         SET_HCIDEV_DEV(hdev, &intf->dev);
3671
3672         reset_gpio = gpiod_get_optional(&data->udev->dev, "reset",
3673                                         GPIOD_OUT_LOW);
3674         if (IS_ERR(reset_gpio)) {
3675                 err = PTR_ERR(reset_gpio);
3676                 goto out_free_dev;
3677         } else if (reset_gpio) {
3678                 data->reset_gpio = reset_gpio;
3679         }
3680
3681         hdev->open   = btusb_open;
3682         hdev->close  = btusb_close;
3683         hdev->flush  = btusb_flush;
3684         hdev->send   = btusb_send_frame;
3685         hdev->notify = btusb_notify;
3686         hdev->wakeup = btusb_wakeup;
3687
3688 #ifdef CONFIG_PM
3689         err = btusb_config_oob_wake(hdev);
3690         if (err)
3691                 goto out_free_dev;
3692
3693         /* Marvell devices may need a specific chip configuration */
3694         if (id->driver_info & BTUSB_MARVELL && data->oob_wake_irq) {
3695                 err = marvell_config_oob_wake(hdev);
3696                 if (err)
3697                         goto out_free_dev;
3698         }
3699 #endif
3700         if (id->driver_info & BTUSB_CW6622)
3701                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
3702
3703         if (id->driver_info & BTUSB_BCM2045)
3704                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
3705
3706         if (id->driver_info & BTUSB_BCM92035)
3707                 hdev->setup = btusb_setup_bcm92035;
3708
3709         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
3710             (id->driver_info & BTUSB_BCM_PATCHRAM)) {
3711                 hdev->manufacturer = 15;
3712                 hdev->setup = btbcm_setup_patchram;
3713                 hdev->set_diag = btusb_bcm_set_diag;
3714                 hdev->set_bdaddr = btbcm_set_bdaddr;
3715
3716                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
3717                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
3718         }
3719
3720         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
3721             (id->driver_info & BTUSB_BCM_APPLE)) {
3722                 hdev->manufacturer = 15;
3723                 hdev->setup = btbcm_setup_apple;
3724                 hdev->set_diag = btusb_bcm_set_diag;
3725
3726                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
3727                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
3728         }
3729
3730         /* Combined Intel Device setup to support multiple setup routine */
3731         if (id->driver_info & BTUSB_INTEL_COMBINED) {
3732                 err = btintel_configure_setup(hdev);
3733                 if (err)
3734                         goto out_free_dev;
3735
3736                 /* Transport specific configuration */
3737                 hdev->send = btusb_send_frame_intel;
3738                 hdev->cmd_timeout = btusb_intel_cmd_timeout;
3739
3740                 if (id->driver_info & BTUSB_INTEL_BROKEN_INITIAL_NCMD)
3741                         btintel_set_flag(hdev, INTEL_BROKEN_INITIAL_NCMD);
3742
3743                 if (id->driver_info & BTUSB_INTEL_BROKEN_SHUTDOWN_LED)
3744                         btintel_set_flag(hdev, INTEL_BROKEN_SHUTDOWN_LED);
3745         }
3746
3747         if (id->driver_info & BTUSB_MARVELL)
3748                 hdev->set_bdaddr = btusb_set_bdaddr_marvell;
3749
3750         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK) &&
3751             (id->driver_info & BTUSB_MEDIATEK)) {
3752                 hdev->setup = btusb_mtk_setup;
3753                 hdev->shutdown = btusb_mtk_shutdown;
3754                 hdev->manufacturer = 70;
3755                 hdev->cmd_timeout = btusb_mtk_cmd_timeout;
3756                 hdev->set_bdaddr = btmtk_set_bdaddr;
3757                 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
3758                 data->recv_acl = btusb_recv_acl_mtk;
3759         }
3760
3761         if (id->driver_info & BTUSB_SWAVE) {
3762                 set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
3763                 set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
3764         }
3765
3766         if (id->driver_info & BTUSB_INTEL_BOOT) {
3767                 hdev->manufacturer = 2;
3768                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
3769         }
3770
3771         if (id->driver_info & BTUSB_ATH3012) {
3772                 data->setup_on_usb = btusb_setup_qca;
3773                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
3774                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3775                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
3776         }
3777
3778         if (id->driver_info & BTUSB_QCA_ROME) {
3779                 data->setup_on_usb = btusb_setup_qca;
3780                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
3781                 hdev->cmd_timeout = btusb_qca_cmd_timeout;
3782                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3783                 btusb_check_needs_reset_resume(intf);
3784         }
3785
3786         if (id->driver_info & BTUSB_QCA_WCN6855) {
3787                 data->setup_on_usb = btusb_setup_qca;
3788                 hdev->shutdown = btusb_shutdown_qca;
3789                 hdev->set_bdaddr = btusb_set_bdaddr_wcn6855;
3790                 hdev->cmd_timeout = btusb_qca_cmd_timeout;
3791                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3792                 hci_set_msft_opcode(hdev, 0xFD70);
3793         }
3794
3795         if (id->driver_info & BTUSB_AMP) {
3796                 /* AMP controllers do not support SCO packets */
3797                 data->isoc = NULL;
3798         } else {
3799                 /* Interface orders are hardcoded in the specification */
3800                 data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
3801                 data->isoc_ifnum = ifnum_base + 1;
3802         }
3803
3804         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
3805             (id->driver_info & BTUSB_REALTEK)) {
3806                 hdev->setup = btrtl_setup_realtek;
3807                 hdev->shutdown = btrtl_shutdown_realtek;
3808                 hdev->cmd_timeout = btusb_rtl_cmd_timeout;
3809
3810                 /* Realtek devices need to set remote wakeup on auto-suspend */
3811                 set_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags);
3812                 set_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags);
3813         }
3814
3815         if (!reset)
3816                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3817
3818         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
3819                 if (!disable_scofix)
3820                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
3821         }
3822
3823         if (id->driver_info & BTUSB_BROKEN_ISOC)
3824                 data->isoc = NULL;
3825
3826         if (id->driver_info & BTUSB_WIDEBAND_SPEECH)
3827                 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
3828
3829         if (id->driver_info & BTUSB_VALID_LE_STATES)
3830                 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
3831
3832         if (id->driver_info & BTUSB_DIGIANSWER) {
3833                 data->cmdreq_type = USB_TYPE_VENDOR;
3834                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3835         }
3836
3837         if (id->driver_info & BTUSB_CSR) {
3838                 struct usb_device *udev = data->udev;
3839                 u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
3840
3841                 /* Old firmware would otherwise execute USB reset */
3842                 if (bcdDevice < 0x117)
3843                         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3844
3845                 /* This must be set first in case we disable it for fakes */
3846                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3847
3848                 /* Fake CSR devices with broken commands */
3849                 if (le16_to_cpu(udev->descriptor.idVendor)  == 0x0a12 &&
3850                     le16_to_cpu(udev->descriptor.idProduct) == 0x0001)
3851                         hdev->setup = btusb_setup_csr;
3852         }
3853
3854         if (id->driver_info & BTUSB_SNIFFER) {
3855                 struct usb_device *udev = data->udev;
3856
3857                 /* New sniffer firmware has crippled HCI interface */
3858                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
3859                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
3860         }
3861
3862         if (id->driver_info & BTUSB_INTEL_BOOT) {
3863                 /* A bug in the bootloader causes that interrupt interface is
3864                  * only enabled after receiving SetInterface(0, AltSetting=0).
3865                  */
3866                 err = usb_set_interface(data->udev, 0, 0);
3867                 if (err < 0) {
3868                         BT_ERR("failed to set interface 0, alt 0 %d", err);
3869                         goto out_free_dev;
3870                 }
3871         }
3872
3873         if (data->isoc) {
3874                 err = usb_driver_claim_interface(&btusb_driver,
3875                                                  data->isoc, data);
3876                 if (err < 0)
3877                         goto out_free_dev;
3878         }
3879
3880         if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) && data->diag) {
3881                 if (!usb_driver_claim_interface(&btusb_driver,
3882                                                 data->diag, data))
3883                         __set_diag_interface(hdev);
3884                 else
3885                         data->diag = NULL;
3886         }
3887
3888         if (enable_autosuspend)
3889                 usb_enable_autosuspend(data->udev);
3890
3891         err = hci_register_dev(hdev);
3892         if (err < 0)
3893                 goto out_free_dev;
3894
3895         usb_set_intfdata(intf, data);
3896
3897         debugfs_create_file("force_poll_sync", 0644, hdev->debugfs, data,
3898                             &force_poll_sync_fops);
3899
3900         return 0;
3901
3902 out_free_dev:
3903         if (data->reset_gpio)
3904                 gpiod_put(data->reset_gpio);
3905         hci_free_dev(hdev);
3906         return err;
3907 }
3908
3909 static void btusb_disconnect(struct usb_interface *intf)
3910 {
3911         struct btusb_data *data = usb_get_intfdata(intf);
3912         struct hci_dev *hdev;
3913
3914         BT_DBG("intf %p", intf);
3915
3916         if (!data)
3917                 return;
3918
3919         hdev = data->hdev;
3920         usb_set_intfdata(data->intf, NULL);
3921
3922         if (data->isoc)
3923                 usb_set_intfdata(data->isoc, NULL);
3924
3925         if (data->diag)
3926                 usb_set_intfdata(data->diag, NULL);
3927
3928         hci_unregister_dev(hdev);
3929
3930         if (intf == data->intf) {
3931                 if (data->isoc)
3932                         usb_driver_release_interface(&btusb_driver, data->isoc);
3933                 if (data->diag)
3934                         usb_driver_release_interface(&btusb_driver, data->diag);
3935         } else if (intf == data->isoc) {
3936                 if (data->diag)
3937                         usb_driver_release_interface(&btusb_driver, data->diag);
3938                 usb_driver_release_interface(&btusb_driver, data->intf);
3939         } else if (intf == data->diag) {
3940                 usb_driver_release_interface(&btusb_driver, data->intf);
3941                 if (data->isoc)
3942                         usb_driver_release_interface(&btusb_driver, data->isoc);
3943         }
3944
3945         if (data->oob_wake_irq)
3946                 device_init_wakeup(&data->udev->dev, false);
3947
3948         if (data->reset_gpio)
3949                 gpiod_put(data->reset_gpio);
3950
3951         hci_free_dev(hdev);
3952 }
3953
3954 #ifdef CONFIG_PM
3955 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
3956 {
3957         struct btusb_data *data = usb_get_intfdata(intf);
3958
3959         BT_DBG("intf %p", intf);
3960
3961         if (data->suspend_count++)
3962                 return 0;
3963
3964         spin_lock_irq(&data->txlock);
3965         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
3966                 set_bit(BTUSB_SUSPENDING, &data->flags);
3967                 spin_unlock_irq(&data->txlock);
3968         } else {
3969                 spin_unlock_irq(&data->txlock);
3970                 data->suspend_count--;
3971                 return -EBUSY;
3972         }
3973
3974         cancel_work_sync(&data->work);
3975
3976         btusb_stop_traffic(data);
3977         usb_kill_anchored_urbs(&data->tx_anchor);
3978
3979         if (data->oob_wake_irq && device_may_wakeup(&data->udev->dev)) {
3980                 set_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
3981                 enable_irq_wake(data->oob_wake_irq);
3982                 enable_irq(data->oob_wake_irq);
3983         }
3984
3985         /* For global suspend, Realtek devices lose the loaded fw
3986          * in them. But for autosuspend, firmware should remain.
3987          * Actually, it depends on whether the usb host sends
3988          * set feature (enable wakeup) or not.
3989          */
3990         if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags)) {
3991                 if (PMSG_IS_AUTO(message) &&
3992                     device_can_wakeup(&data->udev->dev))
3993                         data->udev->do_remote_wakeup = 1;
3994                 else if (!PMSG_IS_AUTO(message) &&
3995                          !device_may_wakeup(&data->udev->dev)) {
3996                         data->udev->do_remote_wakeup = 0;
3997                         data->udev->reset_resume = 1;
3998                 }
3999         }
4000
4001         return 0;
4002 }
4003
4004 static void play_deferred(struct btusb_data *data)
4005 {
4006         struct urb *urb;
4007         int err;
4008
4009         while ((urb = usb_get_from_anchor(&data->deferred))) {
4010                 usb_anchor_urb(urb, &data->tx_anchor);
4011
4012                 err = usb_submit_urb(urb, GFP_ATOMIC);
4013                 if (err < 0) {
4014                         if (err != -EPERM && err != -ENODEV)
4015                                 BT_ERR("%s urb %p submission failed (%d)",
4016                                        data->hdev->name, urb, -err);
4017                         kfree(urb->setup_packet);
4018                         usb_unanchor_urb(urb);
4019                         usb_free_urb(urb);
4020                         break;
4021                 }
4022
4023                 data->tx_in_flight++;
4024                 usb_free_urb(urb);
4025         }
4026
4027         /* Cleanup the rest deferred urbs. */
4028         while ((urb = usb_get_from_anchor(&data->deferred))) {
4029                 kfree(urb->setup_packet);
4030                 usb_free_urb(urb);
4031         }
4032 }
4033
4034 static int btusb_resume(struct usb_interface *intf)
4035 {
4036         struct btusb_data *data = usb_get_intfdata(intf);
4037         struct hci_dev *hdev = data->hdev;
4038         int err = 0;
4039
4040         BT_DBG("intf %p", intf);
4041
4042         if (--data->suspend_count)
4043                 return 0;
4044
4045         /* Disable only if not already disabled (keep it balanced) */
4046         if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
4047                 disable_irq(data->oob_wake_irq);
4048                 disable_irq_wake(data->oob_wake_irq);
4049         }
4050
4051         if (!test_bit(HCI_RUNNING, &hdev->flags))
4052                 goto done;
4053
4054         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
4055                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
4056                 if (err < 0) {
4057                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
4058                         goto failed;
4059                 }
4060         }
4061
4062         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
4063                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
4064                 if (err < 0) {
4065                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
4066                         goto failed;
4067                 }
4068
4069                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
4070         }
4071
4072         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
4073                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
4074                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
4075                 else
4076                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
4077         }
4078
4079         spin_lock_irq(&data->txlock);
4080         play_deferred(data);
4081         clear_bit(BTUSB_SUSPENDING, &data->flags);
4082         spin_unlock_irq(&data->txlock);
4083         schedule_work(&data->work);
4084
4085         return 0;
4086
4087 failed:
4088         usb_scuttle_anchored_urbs(&data->deferred);
4089 done:
4090         spin_lock_irq(&data->txlock);
4091         clear_bit(BTUSB_SUSPENDING, &data->flags);
4092         spin_unlock_irq(&data->txlock);
4093
4094         return err;
4095 }
4096 #endif
4097
4098 static struct usb_driver btusb_driver = {
4099         .name           = "btusb",
4100         .probe          = btusb_probe,
4101         .disconnect     = btusb_disconnect,
4102 #ifdef CONFIG_PM
4103         .suspend        = btusb_suspend,
4104         .resume         = btusb_resume,
4105 #endif
4106         .id_table       = btusb_table,
4107         .supports_autosuspend = 1,
4108         .disable_hub_initiated_lpm = 1,
4109 };
4110
4111 module_usb_driver(btusb_driver);
4112
4113 module_param(disable_scofix, bool, 0644);
4114 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
4115
4116 module_param(force_scofix, bool, 0644);
4117 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
4118
4119 module_param(enable_autosuspend, bool, 0644);
4120 MODULE_PARM_DESC(enable_autosuspend, "Enable USB autosuspend by default");
4121
4122 module_param(reset, bool, 0644);
4123 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
4124
4125 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
4126 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
4127 MODULE_VERSION(VERSION);
4128 MODULE_LICENSE("GPL");