root/drivers/bluetooth/btusb.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 *  Generic Bluetooth USB driver
 *
 *  Copyright (C) 2005-2008  Marcel Holtmann <marcel@holtmann.org>
 */

#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/quirks.h>
#include <linux/firmware.h>
#include <linux/iopoll.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/suspend.h>
#include <linux/gpio/consumer.h>
#include <linux/debugfs.h>
#include <linux/unaligned.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <net/bluetooth/hci_drv.h>

#include "btintel.h"
#include "btbcm.h"
#include "btrtl.h"
#include "btmtk.h"

#define VERSION "0.8"

static bool disable_scofix;
static bool force_scofix;
static bool enable_autosuspend = IS_ENABLED(CONFIG_BT_HCIBTUSB_AUTOSUSPEND);
static bool enable_poll_sync = IS_ENABLED(CONFIG_BT_HCIBTUSB_POLL_SYNC);
static bool reset = true;

static struct usb_driver btusb_driver;

#define BTUSB_IGNORE                    BIT(0)
#define BTUSB_DIGIANSWER                BIT(1)
#define BTUSB_CSR                       BIT(2)
#define BTUSB_SNIFFER                   BIT(3)
#define BTUSB_BCM92035                  BIT(4)
#define BTUSB_BROKEN_ISOC               BIT(5)
#define BTUSB_WRONG_SCO_MTU             BIT(6)
#define BTUSB_ATH3012                   BIT(7)
#define BTUSB_INTEL_COMBINED            BIT(8)
#define BTUSB_INTEL_BOOT                BIT(9)
#define BTUSB_BCM_PATCHRAM              BIT(10)
#define BTUSB_MARVELL                   BIT(11)
#define BTUSB_SWAVE                     BIT(12)
#define BTUSB_AMP                       BIT(13)
#define BTUSB_QCA_ROME                  BIT(14)
#define BTUSB_BCM_APPLE                 BIT(15)
#define BTUSB_REALTEK                   BIT(16)
#define BTUSB_BCM2045                   BIT(17)
#define BTUSB_IFNUM_2                   BIT(18)
#define BTUSB_CW6622                    BIT(19)
#define BTUSB_MEDIATEK                  BIT(20)
#define BTUSB_WIDEBAND_SPEECH           BIT(21)
#define BTUSB_INVALID_LE_STATES         BIT(22)
#define BTUSB_QCA_WCN6855               BIT(23)
#define BTUSB_INTEL_BROKEN_SHUTDOWN_LED BIT(24)
#define BTUSB_INTEL_BROKEN_INITIAL_NCMD BIT(25)
#define BTUSB_INTEL_NO_WBS_SUPPORT      BIT(26)
#define BTUSB_ACTIONS_SEMI              BIT(27)
#define BTUSB_BARROT                    BIT(28)

static const struct usb_device_id btusb_table[] = {
        /* Generic Bluetooth USB device */
        { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },

        /* Generic Bluetooth AMP device */
        { USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },

        /* Generic Bluetooth USB interface */
        { USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },

        /* Apple-specific (Broadcom) devices */
        { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },

        /* MediaTek MT76x0E */
        { USB_DEVICE(0x0e8d, 0x763f) },

        /* Broadcom SoftSailing reporting vendor specific */
        { USB_DEVICE(0x0a5c, 0x21e1) },

        /* Apple MacBookPro 7,1 */
        { USB_DEVICE(0x05ac, 0x8213) },

        /* Apple iMac11,1 */
        { USB_DEVICE(0x05ac, 0x8215) },

        /* Apple MacBookPro6,2 */
        { USB_DEVICE(0x05ac, 0x8218) },

        /* Apple MacBookAir3,1, MacBookAir3,2 */
        { USB_DEVICE(0x05ac, 0x821b) },

        /* Apple MacBookAir4,1 */
        { USB_DEVICE(0x05ac, 0x821f) },

        /* Apple MacBookPro8,2 */
        { USB_DEVICE(0x05ac, 0x821a) },

        /* Apple MacMini5,1 */
        { USB_DEVICE(0x05ac, 0x8281) },

        /* AVM BlueFRITZ! USB v2.0 */
        { USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },

        /* Bluetooth Ultraport Module from IBM */
        { USB_DEVICE(0x04bf, 0x030a) },

        /* ALPS Modules with non-standard id */
        { USB_DEVICE(0x044e, 0x3001) },
        { USB_DEVICE(0x044e, 0x3002) },

        /* Ericsson with non-standard id */
        { USB_DEVICE(0x0bdb, 0x1002) },

        /* Canyon CN-BTU1 with HID interfaces */
        { USB_DEVICE(0x0c10, 0x0000) },

        /* Broadcom BCM20702B0 (Dynex/Insignia) */
        { USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },

        /* Broadcom BCM43142A0 (Foxconn/Lenovo) */
        { USB_VENDOR_AND_INTERFACE_INFO(0x105b, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* Broadcom BCM920703 (HTC Vive) */
        { USB_VENDOR_AND_INTERFACE_INFO(0x0bb4, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* Foxconn - Hon Hai */
        { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* Lite-On Technology - Broadcom based */
        { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* Broadcom devices with vendor specific id */
        { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* ASUSTek Computer - Broadcom based */
        { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* Belkin F8065bf - Broadcom based */
        { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* IMC Networks - Broadcom based */
        { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* Dell Computer - Broadcom based  */
        { USB_VENDOR_AND_INTERFACE_INFO(0x413c, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* Toshiba Corp - Broadcom based */
        { USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
          .driver_info = BTUSB_BCM_PATCHRAM },

        /* Intel Bluetooth USB Bootloader (RAM module) */
        { USB_DEVICE(0x8087, 0x0a5a),
          .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },

        { }     /* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, btusb_table);

static const struct usb_device_id quirks_table[] = {
        /* CSR BlueCore devices */
        { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },

        /* Broadcom BCM2033 without firmware */
        { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },

        /* Broadcom BCM2045 devices */
        { USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },

        /* Atheros 3011 with sflash firmware */
        { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
        { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
        { USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
        { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
        { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
        { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
        { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },

        /* Atheros AR9285 Malbec with sflash firmware */
        { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },

        /* Atheros 3012 with sflash firmware */
        { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },

        /* Atheros AR5BBU12 with sflash firmware */
        { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },

        /* Atheros AR5BBU12 with sflash firmware */
        { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
        { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },

        /* QCA ROME chipset */
        { USB_DEVICE(0x0cf3, 0x535b), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cf3, 0xe009), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cf3, 0xe010), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cf3, 0xe301), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cf3, 0xe500), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe092), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe09f), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0a2), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3011), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3015), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3016), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x301a), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3021), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3491), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3496), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3501), .driver_info = BTUSB_QCA_ROME |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* QCA WCN6855 chipset */
        { USB_DEVICE(0x0489, 0xe0c7), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0c9), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0ca), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0cb), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0cc), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0ce), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0d0), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0d6), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0de), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0df), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0e1), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0e3), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0ea), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0ec), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3022), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3023), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3024), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3a22), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3a24), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3a26), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3a27), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cf3, 0xe600), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9108), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9109), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9208), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9209), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9308), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9309), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9408), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9409), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9508), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9509), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9608), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9609), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x10ab, 0x9f09), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x28de, 0x1401), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* QCA WCN785x chipset */
        { USB_DEVICE(0x0cf3, 0xe700), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0fc), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0f3), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe100), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe103), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe10a), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe10d), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe11b), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe11c), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe11f), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe141), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe14a), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe14b), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe14d), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3623), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3624), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x2c7c, 0x0130), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x2c7c, 0x0131), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x2c7c, 0x0132), .driver_info = BTUSB_QCA_WCN6855 |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Broadcom BCM2035 */
        { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
        { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
        { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },

        /* Broadcom BCM2045 */
        { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
        { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },

        /* IBM/Lenovo ThinkPad with Broadcom chip */
        { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
        { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },

        /* HP laptop with Broadcom chip */
        { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },

        /* Dell laptop with Broadcom chip */
        { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },

        /* Dell Wireless 370 and 410 devices */
        { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
        { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },

        /* Belkin F8T012 and F8T013 devices */
        { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
        { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },

        /* Asus WL-BTD202 device */
        { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },

        /* Kensington Bluetooth USB adapter */
        { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },

        /* RTX Telecom based adapters with buggy SCO support */
        { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
        { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },

        /* CONWISE Technology based adapters with buggy SCO support */
        { USB_DEVICE(0x0e5e, 0x6622),
          .driver_info = BTUSB_BROKEN_ISOC | BTUSB_CW6622},

        /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
        { USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },

        /* Digianswer devices */
        { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
        { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },

        /* CSR BlueCore Bluetooth Sniffer */
        { USB_DEVICE(0x0a12, 0x0002),
          .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },

        /* Frontline ComProbe Bluetooth Sniffer */
        { USB_DEVICE(0x16d3, 0x0002),
          .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },

        /* Marvell Bluetooth devices */
        { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
        { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
        { USB_DEVICE(0x1286, 0x204e), .driver_info = BTUSB_MARVELL },

        /* Intel Bluetooth devices */
        { USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0026), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0029), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0032), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0033), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0035), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0036), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0037), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0038), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0039), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
        { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL_COMBINED |
                                                     BTUSB_INTEL_NO_WBS_SUPPORT |
                                                     BTUSB_INTEL_BROKEN_INITIAL_NCMD |
                                                     BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
        { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL_COMBINED |
                                                     BTUSB_INTEL_NO_WBS_SUPPORT |
                                                     BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
        { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_COMBINED },
        { USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL_COMBINED |
                                                     BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
        { USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_COMBINED },

        /* Other Intel Bluetooth devices */
        { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
          .driver_info = BTUSB_IGNORE },

        /* Realtek 8821CE Bluetooth devices */
        { USB_DEVICE(0x13d3, 0x3529), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3533), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek 8822CE Bluetooth devices */
        { USB_DEVICE(0x0bda, 0xb00c), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0bda, 0xc822), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek 8822CU Bluetooth devices */
        { USB_DEVICE(0x13d3, 0x3549), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek 8851BE Bluetooth devices */
        { USB_DEVICE(0x0bda, 0xb850), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3600), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3601), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x0489, 0xe112), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek 8851BU Bluetooth devices */
        { USB_DEVICE(0x3625, 0x010b), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x2001, 0x332a), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x7392, 0xe611), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek 8852AE Bluetooth devices */
        { USB_DEVICE(0x0bda, 0x2852), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0bda, 0xc852), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0bda, 0x385a), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0bda, 0x4852), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04c5, 0x165c), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x4006), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cb8, 0xc549), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek 8852CE Bluetooth devices */
        { USB_DEVICE(0x04ca, 0x4007), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04c5, 0x1675), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cb8, 0xc558), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3587), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3586), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3592), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3612), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe122), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek 8852BE Bluetooth devices */
        { USB_DEVICE(0x0cb8, 0xc559), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0bda, 0x4853), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0bda, 0x887b), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0bda, 0xb85b), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3570), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3571), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3572), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3591), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe123), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe125), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek 8852BT/8852BE-VT Bluetooth devices */
        { USB_DEVICE(0x0bda, 0x8520), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe12f), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3618), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3619), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek 8922AE Bluetooth devices */
        { USB_DEVICE(0x0bda, 0x8922), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3617), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3616), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe130), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Realtek Bluetooth devices */
        { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
          .driver_info = BTUSB_REALTEK },

        /* MediaTek Bluetooth devices */
        { USB_VENDOR_AND_INTERFACE_INFO(0x0e8d, 0xe0, 0x01, 0x01),
          .driver_info = BTUSB_MEDIATEK |
                         BTUSB_WIDEBAND_SPEECH },

        /* Additional MediaTek MT7615E Bluetooth devices */
        { USB_DEVICE(0x13d3, 0x3560), .driver_info = BTUSB_MEDIATEK},

        /* Additional MediaTek MT7663 Bluetooth devices */
        { USB_DEVICE(0x043e, 0x310c), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3801), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Additional MediaTek MT7668 Bluetooth devices */
        { USB_DEVICE(0x043e, 0x3109), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Additional MediaTek MT7920 Bluetooth devices */
        { USB_DEVICE(0x0489, 0xe134), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe135), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3620), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3621), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3622), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe158), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Additional MediaTek MT7921 Bluetooth devices */
        { USB_DEVICE(0x0489, 0xe0c8), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0cd), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0e0), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0f2), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3802), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0e8d, 0x0608), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3563), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3564), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3567), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3576), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3578), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3583), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3606), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* MediaTek MT7922 Bluetooth devices */
        { USB_DEVICE(0x13d3, 0x3585), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3610), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* MediaTek MT7922A Bluetooth devices */
        { USB_DEVICE(0x0489, 0xe0d8), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0d9), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0e2), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0e4), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0f1), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0f2), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0f5), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe0f6), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe102), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe152), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe153), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe170), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x3804), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04ca, 0x38e4), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3568), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3584), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3605), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3607), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3614), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3615), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3633), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x35f5, 0x7922), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Additional MediaTek MT7925 Bluetooth devices */
        { USB_DEVICE(0x0489, 0xe111), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe113), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe118), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe11e), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe124), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe139), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe14e), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe14f), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe150), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0489, 0xe151), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3602), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3603), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3604), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3608), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3613), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3627), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3628), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3630), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x2c7c, 0x7009), .driver_info = BTUSB_MEDIATEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Additional Realtek 8723AE Bluetooth devices */
        { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },

        /* Additional Realtek 8723BE Bluetooth devices */
        { USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x04f2, 0xb49f), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3494), .driver_info = BTUSB_REALTEK },

        /* Additional Realtek 8723BU Bluetooth devices */
        { USB_DEVICE(0x7392, 0xa611), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x2c0a, 0x8761), .driver_info = BTUSB_REALTEK },

        /* Additional Realtek 8723DE Bluetooth devices */
        { USB_DEVICE(0x0bda, 0xb009), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x2ff8, 0xb011), .driver_info = BTUSB_REALTEK },

        /* Additional Realtek 8761BUV Bluetooth devices */
        { USB_DEVICE(0x2357, 0x0604), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0b05, 0x190e), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x2550, 0x8761), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0bda, 0x8771), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x6655, 0x8771), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x7392, 0xc611), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x2b89, 0x8761), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x2b89, 0x6275), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Additional Realtek 8821AE Bluetooth devices */
        { USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },

        /* Additional Realtek 8822BE Bluetooth devices */
        { USB_DEVICE(0x13d3, 0x3526), .driver_info = BTUSB_REALTEK },
        { USB_DEVICE(0x0b05, 0x185c), .driver_info = BTUSB_REALTEK },

        /* Additional Realtek 8822CE Bluetooth devices */
        { USB_DEVICE(0x04ca, 0x4005), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x04c5, 0x161f), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0b05, 0x18ef), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3548), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3549), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3553), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x13d3, 0x3555), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x2ff8, 0x3051), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x1358, 0xc123), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0bda, 0xc123), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },
        { USB_DEVICE(0x0cb5, 0xc547), .driver_info = BTUSB_REALTEK |
                                                     BTUSB_WIDEBAND_SPEECH },

        /* Barrot Technology Bluetooth devices */
        { USB_DEVICE(0x33fa, 0x0010), .driver_info = BTUSB_BARROT },
        { USB_DEVICE(0x33fa, 0x0012), .driver_info = BTUSB_BARROT },

        /* Actions Semiconductor ATS2851 based devices */
        { USB_DEVICE(0x10d7, 0xb012), .driver_info = BTUSB_ACTIONS_SEMI },

        /* Silicon Wave based devices */
        { USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },

        { }     /* Terminating entry */
};

/* The Bluetooth USB module build into some devices needs to be reset on resume,
 * this is a problem with the platform (likely shutting off all power) not with
 * the module itself. So we use a DMI list to match known broken platforms.
 */
static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
        {
                /* Dell OptiPlex 3060 (QCA ROME device 0cf3:e007) */
                .matches = {
                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
                        DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 3060"),
                },
        },
        {
                /* Dell XPS 9360 (QCA ROME device 0cf3:e300) */
                .matches = {
                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
                        DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
                },
        },
        {
                /* Dell Inspiron 5565 (QCA ROME device 0cf3:e009) */
                .matches = {
                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
                        DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5565"),
                },
        },
        {}
};

struct qca_dump_info {
        /* fields for dump collection */
        u16 id_vendor;
        u16 id_product;
        u32 fw_version;
        u32 controller_id;
        u32 ram_dump_size;
        u16 ram_dump_seqno;
};

#define BTUSB_MAX_ISOC_FRAMES   10

#define BTUSB_INTR_RUNNING      0
#define BTUSB_BULK_RUNNING      1
#define BTUSB_ISOC_RUNNING      2
#define BTUSB_SUSPENDING        3
#define BTUSB_DID_ISO_RESUME    4
#define BTUSB_BOOTLOADER        5
#define BTUSB_DOWNLOADING       6
#define BTUSB_FIRMWARE_LOADED   7
#define BTUSB_FIRMWARE_FAILED   8
#define BTUSB_BOOTING           9
#define BTUSB_DIAG_RUNNING      10
#define BTUSB_OOB_WAKE_ENABLED  11
#define BTUSB_HW_RESET_ACTIVE   12
#define BTUSB_TX_WAIT_VND_EVT   13
#define BTUSB_WAKEUP_AUTOSUSPEND        14
#define BTUSB_USE_ALT3_FOR_WBS  15
#define BTUSB_ALT6_CONTINUOUS_TX        16
#define BTUSB_HW_SSR_ACTIVE     17

struct btusb_data {
        struct hci_dev       *hdev;
        struct usb_device    *udev;
        struct usb_interface *intf;
        struct usb_interface *isoc;
        struct usb_interface *diag;
        unsigned isoc_ifnum;

        unsigned long flags;

        bool poll_sync;
        int intr_interval;
        struct work_struct  work;
        struct work_struct  waker;
        struct delayed_work rx_work;

        struct sk_buff_head acl_q;

        struct usb_anchor deferred;
        struct usb_anchor tx_anchor;
        int tx_in_flight;
        spinlock_t txlock;

        struct usb_anchor intr_anchor;
        struct usb_anchor bulk_anchor;
        struct usb_anchor isoc_anchor;
        struct usb_anchor diag_anchor;
        struct usb_anchor ctrl_anchor;
        spinlock_t rxlock;

        struct sk_buff *evt_skb;
        struct sk_buff *acl_skb;
        struct sk_buff *sco_skb;

        struct usb_endpoint_descriptor *intr_ep;
        struct usb_endpoint_descriptor *bulk_tx_ep;
        struct usb_endpoint_descriptor *bulk_rx_ep;
        struct usb_endpoint_descriptor *isoc_tx_ep;
        struct usb_endpoint_descriptor *isoc_rx_ep;
        struct usb_endpoint_descriptor *diag_tx_ep;
        struct usb_endpoint_descriptor *diag_rx_ep;

        struct gpio_desc *reset_gpio;

        __u8 cmdreq_type;
        __u8 cmdreq;

        unsigned int sco_num;
        unsigned int air_mode;
        bool usb_alt6_packet_flow;
        int isoc_altsetting;
        int suspend_count;

        int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
        int (*recv_acl)(struct hci_dev *hdev, struct sk_buff *skb);
        int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);

        int (*setup_on_usb)(struct hci_dev *hdev);

        int (*suspend)(struct hci_dev *hdev);
        int (*resume)(struct hci_dev *hdev);
        int (*disconnect)(struct hci_dev *hdev);

        int oob_wake_irq;   /* irq for out-of-band wake-on-bt */

        struct qca_dump_info qca_dump;
};

static void btusb_reset(struct hci_dev *hdev)
{
        struct btusb_data *data;
        int err;

        data = hci_get_drvdata(hdev);
        /* This is not an unbalanced PM reference since the device will reset */
        err = usb_autopm_get_interface(data->intf);
        if (err) {
                bt_dev_err(hdev, "Failed usb_autopm_get_interface: %d", err);
                return;
        }

        bt_dev_err(hdev, "Resetting usb device.");
        usb_queue_reset_device(data->intf);
}

static void btusb_intel_reset(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct gpio_desc *reset_gpio = data->reset_gpio;
        struct btintel_data *intel_data = hci_get_priv(hdev);

        if (intel_data->acpi_reset_method) {
                if (test_and_set_bit(INTEL_ACPI_RESET_ACTIVE, intel_data->flags)) {
                        bt_dev_err(hdev, "acpi: last reset failed ? Not resetting again");
                        return;
                }

                bt_dev_err(hdev, "Initiating acpi reset method");
                /* If ACPI reset method fails, lets try with legacy GPIO
                 * toggling
                 */
                if (!intel_data->acpi_reset_method(hdev)) {
                        return;
                }
        }

        if (!reset_gpio) {
                btusb_reset(hdev);
                return;
        }

        /*
         * Toggle the hard reset line if the platform provides one. The reset
         * is going to yank the device off the USB and then replug. So doing
         * once is enough. The cleanup is handled correctly on the way out
         * (standard USB disconnect), and the new device is detected cleanly
         * and bound to the driver again like it should be.
         */
        if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
                bt_dev_err(hdev, "last reset failed? Not resetting again");
                return;
        }

        bt_dev_err(hdev, "Initiating HW reset via gpio");
        gpiod_set_value_cansleep(reset_gpio, 1);
        msleep(100);
        gpiod_set_value_cansleep(reset_gpio, 0);
}

#define RTK_DEVCOREDUMP_CODE_MEMDUMP            0x01
#define RTK_DEVCOREDUMP_CODE_HW_ERR             0x02
#define RTK_DEVCOREDUMP_CODE_CMD_TIMEOUT        0x03

#define RTK_SUB_EVENT_CODE_COREDUMP             0x34

struct rtk_dev_coredump_hdr {
        u8 type;
        u8 code;
        u8 reserved[2];
} __packed;

static inline void btusb_rtl_alloc_devcoredump(struct hci_dev *hdev,
                struct rtk_dev_coredump_hdr *hdr, u8 *buf, u32 len)
{
        struct sk_buff *skb;

        skb = alloc_skb(len + sizeof(*hdr), GFP_ATOMIC);
        if (!skb)
                return;

        skb_put_data(skb, hdr, sizeof(*hdr));
        if (len)
                skb_put_data(skb, buf, len);

        if (!hci_devcd_init(hdev, skb->len)) {
                hci_devcd_append(hdev, skb);
                hci_devcd_complete(hdev);
        } else {
                bt_dev_err(hdev, "RTL: Failed to generate devcoredump");
                kfree_skb(skb);
        }
}

static void btusb_rtl_reset(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct gpio_desc *reset_gpio = data->reset_gpio;
        struct rtk_dev_coredump_hdr hdr = {
                .type = RTK_DEVCOREDUMP_CODE_CMD_TIMEOUT,
        };

        btusb_rtl_alloc_devcoredump(hdev, &hdr, NULL, 0);

        if (!reset_gpio) {
                btusb_reset(hdev);
                return;
        }

        /* Toggle the hard reset line. The Realtek device is going to
         * yank itself off the USB and then replug. The cleanup is handled
         * correctly on the way out (standard USB disconnect), and the new
         * device is detected cleanly and bound to the driver again like
         * it should be.
         */
        if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
                bt_dev_err(hdev, "last reset failed? Not resetting again");
                return;
        }

        bt_dev_err(hdev, "Reset Realtek device via gpio");
        gpiod_set_value_cansleep(reset_gpio, 1);
        msleep(200);
        gpiod_set_value_cansleep(reset_gpio, 0);
}

static void btusb_rtl_hw_error(struct hci_dev *hdev, u8 code)
{
        struct rtk_dev_coredump_hdr hdr = {
                .type = RTK_DEVCOREDUMP_CODE_HW_ERR,
                .code = code,
        };

        bt_dev_err(hdev, "RTL: hw err, trigger devcoredump (%d)", code);

        btusb_rtl_alloc_devcoredump(hdev, &hdr, NULL, 0);
}

static void btusb_qca_reset(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct gpio_desc *reset_gpio = data->reset_gpio;

        if (test_bit(BTUSB_HW_SSR_ACTIVE, &data->flags)) {
                bt_dev_info(hdev, "Ramdump in progress, defer reset");
                return;
        }

        if (reset_gpio) {
                bt_dev_err(hdev, "Reset qca device via bt_en gpio");

                /* Toggle the hard reset line. The qca bt device is going to
                 * yank itself off the USB and then replug. The cleanup is handled
                 * correctly on the way out (standard USB disconnect), and the new
                 * device is detected cleanly and bound to the driver again like
                 * it should be.
                 */
                if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
                        bt_dev_err(hdev, "last reset failed? Not resetting again");
                        return;
                }

                gpiod_set_value_cansleep(reset_gpio, 0);
                msleep(200);
                gpiod_set_value_cansleep(reset_gpio, 1);

                return;
        }

        btusb_reset(hdev);
}

static u8 btusb_classify_qca_pkt_type(struct hci_dev *hdev, struct sk_buff *skb)
{
        /* Some Qualcomm controllers, e.g., QCNFA765 with WCN6855 chip, send debug
         * packets as ACL frames with connection handle 0x2EDC. These are not real
         * ACL packets and should be reclassified as HCI_DIAG_PKT to prevent
         * "ACL packet for unknown connection handle 3804" errors.
         */
        if (skb->len >= 2) {
                u16 handle = get_unaligned_le16(skb->data);

                if (handle == 0x2EDC)
                        return HCI_DIAG_PKT;
        }

        /* Use default packet type for other packets */
        return hci_skb_pkt_type(skb);
}

static inline void btusb_free_frags(struct btusb_data *data)
{
        unsigned long flags;

        spin_lock_irqsave(&data->rxlock, flags);

        dev_kfree_skb_irq(data->evt_skb);
        data->evt_skb = NULL;

        dev_kfree_skb_irq(data->acl_skb);
        data->acl_skb = NULL;

        dev_kfree_skb_irq(data->sco_skb);
        data->sco_skb = NULL;

        spin_unlock_irqrestore(&data->rxlock, flags);
}

static int btusb_recv_event(struct btusb_data *data, struct sk_buff *skb)
{
        if (data->intr_interval) {
                /* Trigger dequeue immediately if an event is received */
                schedule_delayed_work(&data->rx_work, 0);
        }

        return data->recv_event(data->hdev, skb);
}

static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
{
        struct sk_buff *skb;
        unsigned long flags;
        int err = 0;

        spin_lock_irqsave(&data->rxlock, flags);
        skb = data->evt_skb;

        while (count) {
                int len;

                if (!skb) {
                        skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
                        if (!skb) {
                                err = -ENOMEM;
                                break;
                        }

                        hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
                        hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
                }

                len = min_t(uint, hci_skb_expect(skb), count);
                skb_put_data(skb, buffer, len);

                count -= len;
                buffer += len;
                hci_skb_expect(skb) -= len;

                if (skb->len == HCI_EVENT_HDR_SIZE) {
                        /* Complete event header */
                        hci_skb_expect(skb) = hci_event_hdr(skb)->plen;

                        if (skb_tailroom(skb) < hci_skb_expect(skb)) {
                                kfree_skb(skb);
                                skb = NULL;

                                err = -EILSEQ;
                                break;
                        }
                }

                if (!hci_skb_expect(skb)) {
                        /* Each chunk should correspond to at least 1 or more
                         * events so if there are still bytes left that doesn't
                         * constitute a new event this is likely a bug in the
                         * controller.
                         */
                        if (count && count < HCI_EVENT_HDR_SIZE) {
                                bt_dev_warn(data->hdev,
                                        "Unexpected continuation: %d bytes",
                                        count);
                                count = 0;
                        }

                        /* Complete frame */
                        btusb_recv_event(data, skb);
                        skb = NULL;
                }
        }

        data->evt_skb = skb;
        spin_unlock_irqrestore(&data->rxlock, flags);

        return err;
}

static int btusb_recv_acl(struct btusb_data *data, struct sk_buff *skb)
{
        /* Only queue ACL packet if intr_interval is set as it means
         * force_poll_sync has been enabled.
         */
        if (!data->intr_interval)
                return data->recv_acl(data->hdev, skb);

        skb_queue_tail(&data->acl_q, skb);
        schedule_delayed_work(&data->rx_work, data->intr_interval);

        return 0;
}

static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
{
        struct sk_buff *skb;
        unsigned long flags;
        int err = 0;

        spin_lock_irqsave(&data->rxlock, flags);
        skb = data->acl_skb;

        while (count) {
                int len;

                if (!skb) {
                        skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
                        if (!skb) {
                                err = -ENOMEM;
                                break;
                        }

                        hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
                        hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
                }

                len = min_t(uint, hci_skb_expect(skb), count);
                skb_put_data(skb, buffer, len);

                count -= len;
                buffer += len;
                hci_skb_expect(skb) -= len;

                if (skb->len == HCI_ACL_HDR_SIZE) {
                        __le16 dlen = hci_acl_hdr(skb)->dlen;

                        /* Complete ACL header */
                        hci_skb_expect(skb) = __le16_to_cpu(dlen);

                        if (skb_tailroom(skb) < hci_skb_expect(skb)) {
                                kfree_skb(skb);
                                skb = NULL;

                                err = -EILSEQ;
                                break;
                        }
                }

                if (!hci_skb_expect(skb)) {
                        /* Complete frame */
                        btusb_recv_acl(data, skb);
                        skb = NULL;
                }
        }

        data->acl_skb = skb;
        spin_unlock_irqrestore(&data->rxlock, flags);

        return err;
}

static bool btusb_validate_sco_handle(struct hci_dev *hdev,
                                      struct hci_sco_hdr *hdr)
{
        __u16 handle;

        if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
                // Can't validate, userspace controls everything.
                return true;

        /*
         * USB isochronous transfers are not designed to be reliable and may
         * lose fragments.  When this happens, the next first fragment
         * encountered might actually be a continuation fragment.
         * Validate the handle to detect it and drop it, or else the upper
         * layer will get garbage for a while.
         */

        handle = hci_handle(__le16_to_cpu(hdr->handle));

        switch (hci_conn_lookup_type(hdev, handle)) {
        case SCO_LINK:
        case ESCO_LINK:
                return true;
        default:
                return false;
        }
}

static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
{
        struct sk_buff *skb;
        unsigned long flags;
        int err = 0;

        spin_lock_irqsave(&data->rxlock, flags);
        skb = data->sco_skb;

        while (count) {
                int len;

                if (!skb) {
                        skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
                        if (!skb) {
                                err = -ENOMEM;
                                break;
                        }

                        hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
                        hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
                }

                len = min_t(uint, hci_skb_expect(skb), count);
                skb_put_data(skb, buffer, len);

                count -= len;
                buffer += len;
                hci_skb_expect(skb) -= len;

                if (skb->len == HCI_SCO_HDR_SIZE) {
                        /* Complete SCO header */
                        struct hci_sco_hdr *hdr = hci_sco_hdr(skb);

                        hci_skb_expect(skb) = hdr->dlen;

                        if (skb_tailroom(skb) < hci_skb_expect(skb) ||
                            !btusb_validate_sco_handle(data->hdev, hdr)) {
                                kfree_skb(skb);
                                skb = NULL;

                                err = -EILSEQ;
                                break;
                        }
                }

                if (!hci_skb_expect(skb)) {
                        /* Complete frame */
                        hci_recv_frame(data->hdev, skb);
                        skb = NULL;
                }
        }

        data->sco_skb = skb;
        spin_unlock_irqrestore(&data->rxlock, flags);

        return err;
}

static void btusb_intr_complete(struct urb *urb)
{
        struct hci_dev *hdev = urb->context;
        struct btusb_data *data = hci_get_drvdata(hdev);
        int err;

        BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
               urb->actual_length);

        if (!test_bit(HCI_RUNNING, &hdev->flags))
                return;

        if (urb->status == 0) {
                hdev->stat.byte_rx += urb->actual_length;

                if (btusb_recv_intr(data, urb->transfer_buffer,
                                    urb->actual_length) < 0) {
                        bt_dev_err(hdev, "corrupted event packet");
                        hdev->stat.err_rx++;
                }
        } else if (urb->status == -ENOENT) {
                /* Avoid suspend failed when usb_kill_urb */
                return;
        }

        if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
                return;

        usb_mark_last_busy(data->udev);
        usb_anchor_urb(urb, &data->intr_anchor);

        err = usb_submit_urb(urb, GFP_ATOMIC);
        if (err < 0) {
                /* -EPERM: urb is being killed;
                 * -ENODEV: device got disconnected
                 */
                if (err != -EPERM && err != -ENODEV)
                        bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
                                   urb, -err);
                if (err != -EPERM)
                        hci_cmd_sync_cancel(hdev, -err);
                usb_unanchor_urb(urb);
        }
}

static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct urb *urb;
        unsigned char *buf;
        unsigned int pipe;
        int err, size;

        BT_DBG("%s", hdev->name);

        if (!data->intr_ep)
                return -ENODEV;

        urb = usb_alloc_urb(0, mem_flags);
        if (!urb)
                return -ENOMEM;

        if (le16_to_cpu(data->udev->descriptor.idVendor)  == 0x0a12 &&
            le16_to_cpu(data->udev->descriptor.idProduct) == 0x0001)
                /* Fake CSR devices don't seem to support sort-transter */
                size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
        else
                /* Use maximum HCI Event size so the USB stack handles
                 * ZPL/short-transfer automatically.
                 */
                size = HCI_MAX_EVENT_SIZE;

        buf = kmalloc(size, mem_flags);
        if (!buf) {
                usb_free_urb(urb);
                return -ENOMEM;
        }

        pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);

        usb_fill_int_urb(urb, data->udev, pipe, buf, size,
                         btusb_intr_complete, hdev, data->intr_ep->bInterval);

        urb->transfer_flags |= URB_FREE_BUFFER;

        usb_anchor_urb(urb, &data->intr_anchor);

        err = usb_submit_urb(urb, mem_flags);
        if (err < 0) {
                if (err != -EPERM && err != -ENODEV)
                        bt_dev_err(hdev, "urb %p submission failed (%d)",
                                   urb, -err);
                if (err != -EPERM)
                        hci_cmd_sync_cancel(hdev, -err);
                usb_unanchor_urb(urb);
        }

        /* Only initialize intr_interval if URB poll sync is enabled */
        if (!data->poll_sync)
                goto done;

        /* The units are frames (milliseconds) for full and low speed devices,
         * and microframes (1/8 millisecond) for highspeed and SuperSpeed
         * devices.
         *
         * This is done once on open/resume so it shouldn't change even if
         * force_poll_sync changes.
         */
        switch (urb->dev->speed) {
        case USB_SPEED_SUPER_PLUS:
        case USB_SPEED_SUPER:   /* units are 125us */
                data->intr_interval = usecs_to_jiffies(urb->interval * 125);
                break;
        default:
                data->intr_interval = msecs_to_jiffies(urb->interval);
                break;
        }

done:
        usb_free_urb(urb);

        return err;
}

static void btusb_bulk_complete(struct urb *urb)
{
        struct hci_dev *hdev = urb->context;
        struct btusb_data *data = hci_get_drvdata(hdev);
        int err;

        BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
               urb->actual_length);

        if (!test_bit(HCI_RUNNING, &hdev->flags))
                return;

        if (urb->status == 0) {
                hdev->stat.byte_rx += urb->actual_length;

                if (data->recv_bulk(data, urb->transfer_buffer,
                                    urb->actual_length) < 0) {
                        bt_dev_err(hdev, "corrupted ACL packet");
                        hdev->stat.err_rx++;
                }
        } else if (urb->status == -ENOENT) {
                /* Avoid suspend failed when usb_kill_urb */
                return;
        }

        if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
                return;

        usb_anchor_urb(urb, &data->bulk_anchor);
        usb_mark_last_busy(data->udev);

        err = usb_submit_urb(urb, GFP_ATOMIC);
        if (err < 0) {
                /* -EPERM: urb is being killed;
                 * -ENODEV: device got disconnected
                 */
                if (err != -EPERM && err != -ENODEV)
                        bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
                                   urb, -err);
                usb_unanchor_urb(urb);
        }
}

static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct urb *urb;
        unsigned char *buf;
        unsigned int pipe;
        int err, size = HCI_MAX_FRAME_SIZE;

        BT_DBG("%s", hdev->name);

        if (!data->bulk_rx_ep)
                return -ENODEV;

        urb = usb_alloc_urb(0, mem_flags);
        if (!urb)
                return -ENOMEM;

        buf = kmalloc(size, mem_flags);
        if (!buf) {
                usb_free_urb(urb);
                return -ENOMEM;
        }

        pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);

        usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
                          btusb_bulk_complete, hdev);

        urb->transfer_flags |= URB_FREE_BUFFER;

        usb_mark_last_busy(data->udev);
        usb_anchor_urb(urb, &data->bulk_anchor);

        err = usb_submit_urb(urb, mem_flags);
        if (err < 0) {
                if (err != -EPERM && err != -ENODEV)
                        bt_dev_err(hdev, "urb %p submission failed (%d)",
                                   urb, -err);
                usb_unanchor_urb(urb);
        }

        usb_free_urb(urb);

        return err;
}

static void btusb_isoc_complete(struct urb *urb)
{
        struct hci_dev *hdev = urb->context;
        struct btusb_data *data = hci_get_drvdata(hdev);
        int i, err;

        BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
               urb->actual_length);

        if (!test_bit(HCI_RUNNING, &hdev->flags))
                return;

        if (urb->status == 0) {
                for (i = 0; i < urb->number_of_packets; i++) {
                        unsigned int offset = urb->iso_frame_desc[i].offset;
                        unsigned int length = urb->iso_frame_desc[i].actual_length;

                        if (urb->iso_frame_desc[i].status)
                                continue;

                        hdev->stat.byte_rx += length;

                        if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
                                            length) < 0) {
                                bt_dev_err(hdev, "corrupted SCO packet");
                                hdev->stat.err_rx++;
                        }
                }
        } else if (urb->status == -ENOENT) {
                /* Avoid suspend failed when usb_kill_urb */
                return;
        }

        if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
                return;

        usb_anchor_urb(urb, &data->isoc_anchor);

        err = usb_submit_urb(urb, GFP_ATOMIC);
        if (err < 0) {
                /* -EPERM: urb is being killed;
                 * -ENODEV: device got disconnected
                 */
                if (err != -EPERM && err != -ENODEV)
                        bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
                                   urb, -err);
                usb_unanchor_urb(urb);
        }
}

static inline void __fill_isoc_descriptor_msbc(struct urb *urb, int len,
                                               int mtu, struct btusb_data *data)
{
        int i = 0, offset = 0;
        unsigned int interval;

        BT_DBG("len %d mtu %d", len, mtu);

        /* For mSBC ALT 6 settings some chips need to transmit the data
         * continuously without the zero length of USB packets.
         */
        if (test_bit(BTUSB_ALT6_CONTINUOUS_TX, &data->flags))
                goto ignore_usb_alt6_packet_flow;

        /* For mSBC ALT 6 setting the host will send the packet at continuous
         * flow. As per core spec 5, vol 4, part B, table 2.1. For ALT setting
         * 6 the HCI PACKET INTERVAL should be 7.5ms for every usb packets.
         * To maintain the rate we send 63bytes of usb packets alternatively for
         * 7ms and 8ms to maintain the rate as 7.5ms.
         */
        if (data->usb_alt6_packet_flow) {
                interval = 7;
                data->usb_alt6_packet_flow = false;
        } else {
                interval = 6;
                data->usb_alt6_packet_flow = true;
        }

        for (i = 0; i < interval; i++) {
                urb->iso_frame_desc[i].offset = offset;
                urb->iso_frame_desc[i].length = offset;
        }

ignore_usb_alt6_packet_flow:
        if (len && i < BTUSB_MAX_ISOC_FRAMES) {
                urb->iso_frame_desc[i].offset = offset;
                urb->iso_frame_desc[i].length = len;
                i++;
        }

        urb->number_of_packets = i;
}

static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
{
        int i, offset = 0;

        BT_DBG("len %d mtu %d", len, mtu);

        for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
                                        i++, offset += mtu, len -= mtu) {
                urb->iso_frame_desc[i].offset = offset;
                urb->iso_frame_desc[i].length = mtu;
        }

        if (len && i < BTUSB_MAX_ISOC_FRAMES) {
                urb->iso_frame_desc[i].offset = offset;
                urb->iso_frame_desc[i].length = len;
                i++;
        }

        urb->number_of_packets = i;
}

static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct urb *urb;
        unsigned char *buf;
        unsigned int pipe;
        int err, size;

        BT_DBG("%s", hdev->name);

        if (!data->isoc_rx_ep)
                return -ENODEV;

        urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
        if (!urb)
                return -ENOMEM;

        size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
                                                BTUSB_MAX_ISOC_FRAMES;

        buf = kmalloc(size, mem_flags);
        if (!buf) {
                usb_free_urb(urb);
                return -ENOMEM;
        }

        pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);

        usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
                         hdev, data->isoc_rx_ep->bInterval);

        urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;

        __fill_isoc_descriptor(urb, size,
                               le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));

        usb_anchor_urb(urb, &data->isoc_anchor);

        err = usb_submit_urb(urb, mem_flags);
        if (err < 0) {
                if (err != -EPERM && err != -ENODEV)
                        bt_dev_err(hdev, "urb %p submission failed (%d)",
                                   urb, -err);
                usb_unanchor_urb(urb);
        }

        usb_free_urb(urb);

        return err;
}

static void btusb_diag_complete(struct urb *urb)
{
        struct hci_dev *hdev = urb->context;
        struct btusb_data *data = hci_get_drvdata(hdev);
        int err;

        BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
               urb->actual_length);

        if (urb->status == 0) {
                struct sk_buff *skb;

                skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
                if (skb) {
                        skb_put_data(skb, urb->transfer_buffer,
                                     urb->actual_length);
                        hci_recv_diag(hdev, skb);
                }
        } else if (urb->status == -ENOENT) {
                /* Avoid suspend failed when usb_kill_urb */
                return;
        }

        if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
                return;

        usb_anchor_urb(urb, &data->diag_anchor);
        usb_mark_last_busy(data->udev);

        err = usb_submit_urb(urb, GFP_ATOMIC);
        if (err < 0) {
                /* -EPERM: urb is being killed;
                 * -ENODEV: device got disconnected
                 */
                if (err != -EPERM && err != -ENODEV)
                        bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
                                   urb, -err);
                usb_unanchor_urb(urb);
        }
}

static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct urb *urb;
        unsigned char *buf;
        unsigned int pipe;
        int err, size = HCI_MAX_FRAME_SIZE;

        BT_DBG("%s", hdev->name);

        if (!data->diag_rx_ep)
                return -ENODEV;

        urb = usb_alloc_urb(0, mem_flags);
        if (!urb)
                return -ENOMEM;

        buf = kmalloc(size, mem_flags);
        if (!buf) {
                usb_free_urb(urb);
                return -ENOMEM;
        }

        pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);

        usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
                          btusb_diag_complete, hdev);

        urb->transfer_flags |= URB_FREE_BUFFER;

        usb_mark_last_busy(data->udev);
        usb_anchor_urb(urb, &data->diag_anchor);

        err = usb_submit_urb(urb, mem_flags);
        if (err < 0) {
                if (err != -EPERM && err != -ENODEV)
                        bt_dev_err(hdev, "urb %p submission failed (%d)",
                                   urb, -err);
                usb_unanchor_urb(urb);
        }

        usb_free_urb(urb);

        return err;
}

static void btusb_tx_complete(struct urb *urb)
{
        struct sk_buff *skb = urb->context;
        struct hci_dev *hdev = (struct hci_dev *)skb->dev;
        struct btusb_data *data = hci_get_drvdata(hdev);
        unsigned long flags;

        BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
               urb->actual_length);

        if (!test_bit(HCI_RUNNING, &hdev->flags))
                goto done;

        if (!urb->status) {
                hdev->stat.byte_tx += urb->transfer_buffer_length;
        } else {
                if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT)
                        hci_cmd_sync_cancel(hdev, -urb->status);
                hdev->stat.err_tx++;
        }

done:
        spin_lock_irqsave(&data->txlock, flags);
        data->tx_in_flight--;
        spin_unlock_irqrestore(&data->txlock, flags);

        kfree(urb->setup_packet);

        kfree_skb(skb);
}

static void btusb_isoc_tx_complete(struct urb *urb)
{
        struct sk_buff *skb = urb->context;
        struct hci_dev *hdev = (struct hci_dev *)skb->dev;

        BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
               urb->actual_length);

        if (!test_bit(HCI_RUNNING, &hdev->flags))
                goto done;

        if (!urb->status)
                hdev->stat.byte_tx += urb->transfer_buffer_length;
        else
                hdev->stat.err_tx++;

done:
        kfree(urb->setup_packet);

        kfree_skb(skb);
}

static int btusb_open(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        int err;

        BT_DBG("%s", hdev->name);

        err = usb_autopm_get_interface(data->intf);
        if (err < 0)
                return err;

        /* Patching USB firmware files prior to starting any URBs of HCI path
         * It is more safe to use USB bulk channel for downloading USB patch
         */
        if (data->setup_on_usb) {
                err = data->setup_on_usb(hdev);
                if (err < 0)
                        goto setup_fail;
        }

        data->intf->needs_remote_wakeup = 1;

        if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
                goto done;

        err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
        if (err < 0)
                goto failed;

        err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
        if (err < 0) {
                usb_kill_anchored_urbs(&data->intr_anchor);
                goto failed;
        }

        set_bit(BTUSB_BULK_RUNNING, &data->flags);
        btusb_submit_bulk_urb(hdev, GFP_KERNEL);

        if (data->diag) {
                if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
                        set_bit(BTUSB_DIAG_RUNNING, &data->flags);
        }

done:
        usb_autopm_put_interface(data->intf);
        return 0;

failed:
        clear_bit(BTUSB_INTR_RUNNING, &data->flags);
setup_fail:
        usb_autopm_put_interface(data->intf);
        return err;
}

static void btusb_stop_traffic(struct btusb_data *data)
{
        usb_kill_anchored_urbs(&data->intr_anchor);
        usb_kill_anchored_urbs(&data->bulk_anchor);
        usb_kill_anchored_urbs(&data->isoc_anchor);
        usb_kill_anchored_urbs(&data->diag_anchor);
        usb_kill_anchored_urbs(&data->ctrl_anchor);
}

static int btusb_close(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        int err;

        BT_DBG("%s", hdev->name);

        cancel_delayed_work(&data->rx_work);
        cancel_work_sync(&data->work);
        cancel_work_sync(&data->waker);

        skb_queue_purge(&data->acl_q);

        clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
        clear_bit(BTUSB_BULK_RUNNING, &data->flags);
        clear_bit(BTUSB_INTR_RUNNING, &data->flags);
        clear_bit(BTUSB_DIAG_RUNNING, &data->flags);

        btusb_stop_traffic(data);
        btusb_free_frags(data);

        err = usb_autopm_get_interface(data->intf);
        if (err < 0)
                goto failed;

        data->intf->needs_remote_wakeup = 0;

        /* Enable remote wake up for auto-suspend */
        if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags))
                data->intf->needs_remote_wakeup = 1;

        usb_autopm_put_interface(data->intf);

failed:
        usb_scuttle_anchored_urbs(&data->deferred);
        return 0;
}

static int btusb_flush(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);

        BT_DBG("%s", hdev->name);

        cancel_delayed_work(&data->rx_work);

        skb_queue_purge(&data->acl_q);

        usb_kill_anchored_urbs(&data->tx_anchor);
        btusb_free_frags(data);

        return 0;
}

static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct usb_ctrlrequest *dr;
        struct urb *urb;
        unsigned int pipe;

        urb = usb_alloc_urb(0, GFP_KERNEL);
        if (!urb)
                return ERR_PTR(-ENOMEM);

        dr = kmalloc_obj(*dr);
        if (!dr) {
                usb_free_urb(urb);
                return ERR_PTR(-ENOMEM);
        }

        dr->bRequestType = data->cmdreq_type;
        dr->bRequest     = data->cmdreq;
        dr->wIndex       = 0;
        dr->wValue       = 0;
        dr->wLength      = __cpu_to_le16(skb->len);

        pipe = usb_sndctrlpipe(data->udev, 0x00);

        usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
                             skb->data, skb->len, btusb_tx_complete, skb);

        skb->dev = (void *)hdev;

        return urb;
}

static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct urb *urb;
        unsigned int pipe;

        if (!data->bulk_tx_ep)
                return ERR_PTR(-ENODEV);

        urb = usb_alloc_urb(0, GFP_KERNEL);
        if (!urb)
                return ERR_PTR(-ENOMEM);

        pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);

        usb_fill_bulk_urb(urb, data->udev, pipe,
                          skb->data, skb->len, btusb_tx_complete, skb);

        skb->dev = (void *)hdev;

        return urb;
}

static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct urb *urb;
        unsigned int pipe;

        if (!data->isoc_tx_ep)
                return ERR_PTR(-ENODEV);

        urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
        if (!urb)
                return ERR_PTR(-ENOMEM);

        pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);

        usb_fill_int_urb(urb, data->udev, pipe,
                         skb->data, skb->len, btusb_isoc_tx_complete,
                         skb, data->isoc_tx_ep->bInterval);

        urb->transfer_flags  = URB_ISO_ASAP;

        if (data->isoc_altsetting == 6)
                __fill_isoc_descriptor_msbc(urb, skb->len,
                                            le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize),
                                            data);
        else
                __fill_isoc_descriptor(urb, skb->len,
                                       le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
        skb->dev = (void *)hdev;

        return urb;
}

static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        int err;

        usb_anchor_urb(urb, &data->tx_anchor);

        err = usb_submit_urb(urb, GFP_KERNEL);
        if (err < 0) {
                if (err != -EPERM && err != -ENODEV)
                        bt_dev_err(hdev, "urb %p submission failed (%d)",
                                   urb, -err);
                kfree(urb->setup_packet);
                usb_unanchor_urb(urb);
        } else {
                usb_mark_last_busy(data->udev);
        }

        usb_free_urb(urb);
        return err;
}

static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        unsigned long flags;
        bool suspending;

        spin_lock_irqsave(&data->txlock, flags);
        suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
        if (!suspending)
                data->tx_in_flight++;
        spin_unlock_irqrestore(&data->txlock, flags);

        if (!suspending)
                return submit_tx_urb(hdev, urb);

        usb_anchor_urb(urb, &data->deferred);
        schedule_work(&data->waker);

        usb_free_urb(urb);
        return 0;
}

static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct urb *urb;

        BT_DBG("%s", hdev->name);

        switch (hci_skb_pkt_type(skb)) {
        case HCI_COMMAND_PKT:
                urb = alloc_ctrl_urb(hdev, skb);
                if (IS_ERR(urb))
                        return PTR_ERR(urb);

                hdev->stat.cmd_tx++;
                return submit_or_queue_tx_urb(hdev, urb);

        case HCI_ACLDATA_PKT:
                urb = alloc_bulk_urb(hdev, skb);
                if (IS_ERR(urb))
                        return PTR_ERR(urb);

                hdev->stat.acl_tx++;
                return submit_or_queue_tx_urb(hdev, urb);

        case HCI_SCODATA_PKT:
                if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
                    hci_conn_num(hdev, SCO_LINK) < 1)
                        return -ENODEV;

                urb = alloc_isoc_urb(hdev, skb);
                if (IS_ERR(urb))
                        return PTR_ERR(urb);

                hdev->stat.sco_tx++;
                return submit_tx_urb(hdev, urb);

        case HCI_ISODATA_PKT:
                urb = alloc_bulk_urb(hdev, skb);
                if (IS_ERR(urb))
                        return PTR_ERR(urb);

                return submit_or_queue_tx_urb(hdev, urb);
        }

        return -EILSEQ;
}

static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
{
        struct btusb_data *data = hci_get_drvdata(hdev);

        BT_DBG("%s evt %d", hdev->name, evt);

        if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
                data->sco_num = hci_conn_num(hdev, SCO_LINK);
                data->air_mode = evt;
                schedule_work(&data->work);
        }
}

static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct usb_interface *intf = data->isoc;
        struct usb_endpoint_descriptor *ep_desc;
        int i, err;

        if (!data->isoc)
                return -ENODEV;

        err = usb_set_interface(data->udev, data->isoc_ifnum, altsetting);
        if (err < 0) {
                bt_dev_err(hdev, "setting interface failed (%d)", -err);
                return err;
        }

        data->isoc_altsetting = altsetting;

        data->isoc_tx_ep = NULL;
        data->isoc_rx_ep = NULL;

        for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
                ep_desc = &intf->cur_altsetting->endpoint[i].desc;

                if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
                        data->isoc_tx_ep = ep_desc;
                        continue;
                }

                if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
                        data->isoc_rx_ep = ep_desc;
                        continue;
                }
        }

        if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
                bt_dev_err(hdev, "invalid SCO descriptors");
                return -ENODEV;
        }

        return 0;
}

static int btusb_switch_alt_setting(struct hci_dev *hdev, int new_alts)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        int err;

        if (data->isoc_altsetting != new_alts) {
                unsigned long flags;

                clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
                usb_kill_anchored_urbs(&data->isoc_anchor);

                /* When isochronous alternate setting needs to be
                 * changed, because SCO connection has been added
                 * or removed, a packet fragment may be left in the
                 * reassembling state. This could lead to wrongly
                 * assembled fragments.
                 *
                 * Clear outstanding fragment when selecting a new
                 * alternate setting.
                 */
                spin_lock_irqsave(&data->rxlock, flags);
                dev_kfree_skb_irq(data->sco_skb);
                data->sco_skb = NULL;
                spin_unlock_irqrestore(&data->rxlock, flags);

                err = __set_isoc_interface(hdev, new_alts);
                if (err < 0)
                        return err;
        }

        if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
                if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
                        clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
                else
                        btusb_submit_isoc_urb(hdev, GFP_KERNEL);
        }

        return 0;
}

static struct usb_host_interface *btusb_find_altsetting(struct btusb_data *data,
                                                        int alt)
{
        struct usb_interface *intf = data->isoc;
        int i;

        BT_DBG("Looking for Alt no :%d", alt);

        if (!intf)
                return NULL;

        for (i = 0; i < intf->num_altsetting; i++) {
                if (intf->altsetting[i].desc.bAlternateSetting == alt)
                        return &intf->altsetting[i];
        }

        return NULL;
}

static void btusb_work(struct work_struct *work)
{
        struct btusb_data *data = container_of(work, struct btusb_data, work);
        struct hci_dev *hdev = data->hdev;
        int new_alts = 0;
        int err;

        if (data->sco_num > 0) {
                if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
                        err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
                        if (err < 0) {
                                clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
                                usb_kill_anchored_urbs(&data->isoc_anchor);
                                return;
                        }

                        set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
                }

                if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_CVSD) {
                        if (hdev->voice_setting & 0x0020) {
                                static const int alts[3] = { 2, 4, 5 };
                                unsigned int sco_idx;

                                sco_idx = min_t(unsigned int, data->sco_num - 1,
                                                ARRAY_SIZE(alts) - 1);
                                new_alts = alts[sco_idx];
                        } else {
                                new_alts = data->sco_num;
                        }
                } else if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_TRANSP) {
                        /* Bluetooth USB spec recommends alt 6 (63 bytes), but
                         * many adapters do not support it.  Alt 1 appears to
                         * work for all adapters that do not have alt 6, and
                         * which work with WBS at all.  Some devices prefer
                         * alt 3 (HCI payload >= 60 Bytes let air packet
                         * data satisfy 60 bytes), requiring
                         * MTU >= 3 (packets) * 25 (size) - 3 (headers) = 72
                         * see also Core spec 5, vol 4, B 2.1.1 & Table 2.1.
                         */
                        if (btusb_find_altsetting(data, 6))
                                new_alts = 6;
                        else if (btusb_find_altsetting(data, 3) &&
                                 hdev->sco_mtu >= 72 &&
                                 test_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags))
                                new_alts = 3;
                        else
                                new_alts = 1;
                }

                if (btusb_switch_alt_setting(hdev, new_alts) < 0)
                        bt_dev_err(hdev, "set USB alt:(%d) failed!", new_alts);
        } else {
                usb_kill_anchored_urbs(&data->isoc_anchor);

                if (test_and_clear_bit(BTUSB_ISOC_RUNNING, &data->flags))
                        __set_isoc_interface(hdev, 0);

                if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
                        usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
        }
}

static void btusb_waker(struct work_struct *work)
{
        struct btusb_data *data = container_of(work, struct btusb_data, waker);
        int err;

        err = usb_autopm_get_interface(data->intf);
        if (err < 0)
                return;

        usb_autopm_put_interface(data->intf);
}

static void btusb_rx_work(struct work_struct *work)
{
        struct btusb_data *data = container_of(work, struct btusb_data,
                                               rx_work.work);
        struct sk_buff *skb;

        /* Dequeue ACL data received during the interval */
        while ((skb = skb_dequeue(&data->acl_q)))
                data->recv_acl(data->hdev, skb);
}

static int btusb_setup_bcm92035(struct hci_dev *hdev)
{
        struct sk_buff *skb;
        u8 val = 0x00;

        BT_DBG("%s", hdev->name);

        skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb))
                bt_dev_err(hdev, "BCM92035 command failed (%ld)", PTR_ERR(skb));
        else
                kfree_skb(skb);

        return 0;
}

static int btusb_setup_csr(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        u16 bcdDevice = le16_to_cpu(data->udev->descriptor.bcdDevice);
        struct hci_rp_read_local_version *rp;
        struct sk_buff *skb;
        bool is_fake = false;
        int ret;

        BT_DBG("%s", hdev->name);

        skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
                             HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                int err = PTR_ERR(skb);
                bt_dev_err(hdev, "CSR: Local version failed (%d)", err);
                return err;
        }

        rp = skb_pull_data(skb, sizeof(*rp));
        if (!rp) {
                bt_dev_err(hdev, "CSR: Local version length mismatch");
                kfree_skb(skb);
                return -EIO;
        }

        bt_dev_info(hdev, "CSR: Setting up dongle with HCI ver=%u rev=%04x",
                    rp->hci_ver, le16_to_cpu(rp->hci_rev));

        bt_dev_info(hdev, "LMP ver=%u subver=%04x; manufacturer=%u",
                    rp->lmp_ver, le16_to_cpu(rp->lmp_subver),
                    le16_to_cpu(rp->manufacturer));

        /* Detect a wide host of Chinese controllers that aren't CSR.
         *
         * Known fake bcdDevices: 0x0100, 0x0134, 0x1915, 0x2520, 0x7558, 0x8891
         *
         * The main thing they have in common is that these are really popular low-cost
         * options that support newer Bluetooth versions but rely on heavy VID/PID
         * squatting of this poor old Bluetooth 1.1 device. Even sold as such.
         *
         * We detect actual CSR devices by checking that the HCI manufacturer code
         * is Cambridge Silicon Radio (10) and ensuring that LMP sub-version and
         * HCI rev values always match. As they both store the firmware number.
         */
        if (le16_to_cpu(rp->manufacturer) != 10 ||
            le16_to_cpu(rp->hci_rev) != le16_to_cpu(rp->lmp_subver))
                is_fake = true;

        /* Known legit CSR firmware build numbers and their supported BT versions:
         * - 1.1 (0x1) -> 0x0073, 0x020d, 0x033c, 0x034e
         * - 1.2 (0x2) ->                 0x04d9, 0x0529
         * - 2.0 (0x3) ->         0x07a6, 0x07ad, 0x0c5c
         * - 2.1 (0x4) ->         0x149c, 0x1735, 0x1899 (0x1899 is a BlueCore4-External)
         * - 4.0 (0x6) ->         0x1d86, 0x2031, 0x22bb
         *
         * e.g. Real CSR dongles with LMP subversion 0x73 are old enough that
         *      support BT 1.1 only; so it's a dead giveaway when some
         *      third-party BT 4.0 dongle reuses it.
         */
        else if (le16_to_cpu(rp->lmp_subver) <= 0x034e &&
                 rp->hci_ver > BLUETOOTH_VER_1_1)
                is_fake = true;

        else if (le16_to_cpu(rp->lmp_subver) <= 0x0529 &&
                 rp->hci_ver > BLUETOOTH_VER_1_2)
                is_fake = true;

        else if (le16_to_cpu(rp->lmp_subver) <= 0x0c5c &&
                 rp->hci_ver > BLUETOOTH_VER_2_0)
                is_fake = true;

        else if (le16_to_cpu(rp->lmp_subver) <= 0x1899 &&
                 rp->hci_ver > BLUETOOTH_VER_2_1)
                is_fake = true;

        else if (le16_to_cpu(rp->lmp_subver) <= 0x22bb &&
                 rp->hci_ver > BLUETOOTH_VER_4_0)
                is_fake = true;

        /* Other clones which beat all the above checks */
        else if (bcdDevice == 0x0134 &&
                 le16_to_cpu(rp->lmp_subver) == 0x0c5c &&
                 rp->hci_ver == BLUETOOTH_VER_2_0)
                is_fake = true;

        if (is_fake) {
                bt_dev_warn(hdev, "CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once...");

                /* Generally these clones have big discrepancies between
                 * advertised features and what's actually supported.
                 * Probably will need to be expanded in the future;
                 * without these the controller will lock up.
                 */
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_STORED_LINK_KEY);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_ERR_DATA_REPORTING);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL);
                hci_set_quirk(hdev, HCI_QUIRK_NO_SUSPEND_NOTIFIER);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_READ_VOICE_SETTING);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_READ_PAGE_SCAN_TYPE);

                /* Clear the reset quirk since this is not an actual
                 * early Bluetooth 1.1 device from CSR.
                 */
                hci_clear_quirk(hdev, HCI_QUIRK_RESET_ON_CLOSE);
                hci_clear_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY);

                /*
                 * Special workaround for these BT 4.0 chip clones, and potentially more:
                 *
                 * - 0x0134: a Barrot 8041a02                 (HCI rev: 0x0810 sub: 0x1012)
                 * - 0x7558: IC markings FR3191AHAL 749H15143 (HCI rev/sub-version: 0x0709)
                 *
                 * These controllers are really messed-up.
                 *
                 * 1. Their bulk RX endpoint will never report any data unless
                 *    the device was suspended at least once (yes, really).
                 * 2. They will not wakeup when autosuspended and receiving data
                 *    on their bulk RX endpoint from e.g. a keyboard or mouse
                 *    (IOW remote-wakeup support is broken for the bulk endpoint).
                 *
                 * To fix 1. enable runtime-suspend, force-suspend the
                 * HCI and then wake-it up by disabling runtime-suspend.
                 *
                 * To fix 2. clear the HCI's can_wake flag, this way the HCI
                 * will still be autosuspended when it is not open.
                 *
                 * --
                 *
                 * Because these are widespread problems we prefer generic solutions; so
                 * apply this initialization quirk to every controller that gets here,
                 * it should be harmless. The alternative is to not work at all.
                 */
                pm_runtime_allow(&data->udev->dev);

                ret = pm_runtime_suspend(&data->udev->dev);
                if (ret >= 0)
                        msleep(200);
                else
                        bt_dev_warn(hdev, "CSR: Couldn't suspend the device for our Barrot 8041a02 receive-issue workaround");

                pm_runtime_forbid(&data->udev->dev);

                device_set_wakeup_capable(&data->udev->dev, false);

                /* Re-enable autosuspend if this was requested */
                if (enable_autosuspend)
                        usb_enable_autosuspend(data->udev);
        }

        kfree_skb(skb);

        return 0;
}

static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
{
        struct sk_buff *skb;
        struct hci_event_hdr *hdr;
        struct hci_ev_cmd_complete *evt;

        skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
        if (!skb)
                return -ENOMEM;

        hdr = skb_put(skb, sizeof(*hdr));
        hdr->evt = HCI_EV_CMD_COMPLETE;
        hdr->plen = sizeof(*evt) + 1;

        evt = skb_put(skb, sizeof(*evt));
        evt->ncmd = 0x01;
        evt->opcode = cpu_to_le16(opcode);

        skb_put_u8(skb, 0x00);

        hci_skb_pkt_type(skb) = HCI_EVENT_PKT;

        return hci_recv_frame(hdev, skb);
}

static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
                                 int count)
{
        struct hci_dev *hdev = data->hdev;

        /* When the device is in bootloader mode, then it can send
         * events via the bulk endpoint. These events are treated the
         * same way as the ones received from the interrupt endpoint.
         */
        if (btintel_test_flag(hdev, INTEL_BOOTLOADER))
                return btusb_recv_intr(data, buffer, count);

        return btusb_recv_bulk(data, buffer, count);
}

static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct urb *urb;

        BT_DBG("%s", hdev->name);

        switch (hci_skb_pkt_type(skb)) {
        case HCI_COMMAND_PKT:
                if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
                        struct hci_command_hdr *cmd = (void *)skb->data;
                        __u16 opcode = le16_to_cpu(cmd->opcode);

                        /* When in bootloader mode and the command 0xfc09
                         * is received, it needs to be send down the
                         * bulk endpoint. So allocate a bulk URB instead.
                         */
                        if (opcode == 0xfc09)
                                urb = alloc_bulk_urb(hdev, skb);
                        else
                                urb = alloc_ctrl_urb(hdev, skb);

                        /* When the BTINTEL_HCI_OP_RESET command is issued to
                         * boot into the operational firmware, it will actually
                         * not send a command complete event. To keep the flow
                         * control working inject that event here.
                         */
                        if (opcode == BTINTEL_HCI_OP_RESET)
                                inject_cmd_complete(hdev, opcode);
                } else {
                        urb = alloc_ctrl_urb(hdev, skb);
                }
                if (IS_ERR(urb))
                        return PTR_ERR(urb);

                hdev->stat.cmd_tx++;
                return submit_or_queue_tx_urb(hdev, urb);

        case HCI_ACLDATA_PKT:
                urb = alloc_bulk_urb(hdev, skb);
                if (IS_ERR(urb))
                        return PTR_ERR(urb);

                hdev->stat.acl_tx++;
                return submit_or_queue_tx_urb(hdev, urb);

        case HCI_SCODATA_PKT:
                if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
                    hci_conn_num(hdev, SCO_LINK) < 1)
                        return -ENODEV;

                urb = alloc_isoc_urb(hdev, skb);
                if (IS_ERR(urb))
                        return PTR_ERR(urb);

                hdev->stat.sco_tx++;
                return submit_tx_urb(hdev, urb);

        case HCI_ISODATA_PKT:
                urb = alloc_bulk_urb(hdev, skb);
                if (IS_ERR(urb))
                        return PTR_ERR(urb);

                return submit_or_queue_tx_urb(hdev, urb);
        }

        return -EILSEQ;
}

static int btusb_setup_realtek(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        int ret;

        ret = btrtl_setup_realtek(hdev);

        if (btrealtek_test_flag(data->hdev, REALTEK_ALT6_CONTINUOUS_TX_CHIP))
                set_bit(BTUSB_ALT6_CONTINUOUS_TX, &data->flags);

        return ret;
}

static int btusb_recv_event_realtek(struct hci_dev *hdev, struct sk_buff *skb)
{
        if (skb->data[0] == HCI_VENDOR_PKT && skb->data[2] == RTK_SUB_EVENT_CODE_COREDUMP) {
                struct rtk_dev_coredump_hdr hdr = {
                        .code = RTK_DEVCOREDUMP_CODE_MEMDUMP,
                };

                bt_dev_dbg(hdev, "RTL: received coredump vendor evt, len %u",
                        skb->len);

                btusb_rtl_alloc_devcoredump(hdev, &hdr, skb->data, skb->len);
                kfree_skb(skb);

                return 0;
        }

        return hci_recv_frame(hdev, skb);
}

static void btusb_mtk_claim_iso_intf(struct btusb_data *data)
{
        struct btmtk_data *btmtk_data;
        int err;

        if (!data->hdev)
                return;

        btmtk_data = hci_get_priv(data->hdev);
        if (!btmtk_data)
                return;

        if (!btmtk_data->isopkt_intf) {
                bt_dev_err(data->hdev, "Can't claim NULL iso interface");
                return;
        }

        /*
         * The function usb_driver_claim_interface() is documented to need
         * locks held if it's not called from a probe routine. The code here
         * is called from the hci_power_on workqueue, so grab the lock.
         */
        device_lock(&btmtk_data->isopkt_intf->dev);
        err = usb_driver_claim_interface(&btusb_driver,
                                         btmtk_data->isopkt_intf, data);
        device_unlock(&btmtk_data->isopkt_intf->dev);
        if (err < 0) {
                btmtk_data->isopkt_intf = NULL;
                bt_dev_err(data->hdev, "Failed to claim iso interface: %d", err);
                return;
        }

        set_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags);
        init_usb_anchor(&btmtk_data->isopkt_anchor);
}

static void btusb_mtk_release_iso_intf(struct hci_dev *hdev)
{
        struct btmtk_data *btmtk_data;

        if (!hdev)
                return;

        btmtk_data = hci_get_priv(hdev);
        if (!btmtk_data)
                return;

        if (test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags)) {
                usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
                clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);

                if (btmtk_data->isopkt_skb) {
                        dev_kfree_skb_irq(btmtk_data->isopkt_skb);
                        btmtk_data->isopkt_skb = NULL;
                }

                if (btmtk_data->isopkt_intf) {
                        usb_set_intfdata(btmtk_data->isopkt_intf, NULL);
                        usb_driver_release_interface(&btusb_driver,
                                                     btmtk_data->isopkt_intf);
                        btmtk_data->isopkt_intf = NULL;
                }
        }

        clear_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags);
}

static int btusb_mtk_disconnect(struct hci_dev *hdev)
{
        /* This function describes the specific additional steps taken by MediaTek
         * when Bluetooth usb driver's resume function is called.
         */
        btusb_mtk_release_iso_intf(hdev);

        return 0;
}

static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct btmtk_data *btmtk_data = hci_get_priv(hdev);
        int err;

        /* It's MediaTek specific bluetooth reset mechanism via USB */
        if (test_and_set_bit(BTMTK_HW_RESET_ACTIVE, &btmtk_data->flags)) {
                bt_dev_err(hdev, "last reset failed? Not resetting again");
                return -EBUSY;
        }

        err = usb_autopm_get_interface(data->intf);
        if (err < 0)
                return err;

        /* Release MediaTek ISO data interface */
        btusb_mtk_release_iso_intf(hdev);

        btusb_stop_traffic(data);
        usb_kill_anchored_urbs(&data->tx_anchor);

        /* Toggle the hard reset line. The MediaTek device is going to
         * yank itself off the USB and then replug. The cleanup is handled
         * correctly on the way out (standard USB disconnect), and the new
         * device is detected cleanly and bound to the driver again like
         * it should be.
         */
        if (data->reset_gpio) {
                gpiod_set_value_cansleep(data->reset_gpio, 1);
                msleep(200);
                gpiod_set_value_cansleep(data->reset_gpio, 0);
                return 0;
        }

        err = btmtk_usb_subsys_reset(hdev, btmtk_data->dev_id);

        usb_queue_reset_device(data->intf);
        clear_bit(BTMTK_HW_RESET_ACTIVE, &btmtk_data->flags);

        return err;
}

static int btusb_send_frame_mtk(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct urb *urb;

        BT_DBG("%s", hdev->name);

        if (hci_skb_pkt_type(skb) == HCI_ISODATA_PKT) {
                urb = alloc_mtk_intr_urb(hdev, skb, btusb_tx_complete);
                if (IS_ERR(urb))
                        return PTR_ERR(urb);

                return submit_or_queue_tx_urb(hdev, urb);
        } else {
                return btusb_send_frame(hdev, skb);
        }
}

static int btusb_mtk_setup(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct btmtk_data *btmtk_data = hci_get_priv(hdev);

        /* MediaTek WMT vendor cmd requiring below USB resources to
         * complete the handshake.
         */
        btmtk_data->drv_name = btusb_driver.name;
        btmtk_data->intf = data->intf;
        btmtk_data->udev = data->udev;
        btmtk_data->ctrl_anchor = &data->ctrl_anchor;
        btmtk_data->reset_sync = btusb_mtk_reset;

        /* Claim ISO data interface and endpoint */
        if (!test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags)) {
                btmtk_data->isopkt_intf = usb_ifnum_to_if(data->udev, MTK_ISO_IFNUM);
                btusb_mtk_claim_iso_intf(data);
        }

        return btmtk_usb_setup(hdev);
}

static int btusb_mtk_shutdown(struct hci_dev *hdev)
{
        int ret;

        ret = btmtk_usb_shutdown(hdev);

        /* Release MediaTek iso interface after shutdown */
        btusb_mtk_release_iso_intf(hdev);

        return ret;
}

#ifdef CONFIG_PM
/* Configure an out-of-band gpio as wake-up pin, if specified in device tree */
static int marvell_config_oob_wake(struct hci_dev *hdev)
{
        struct sk_buff *skb;
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct device *dev = &data->udev->dev;
        u16 pin, gap, opcode;
        int ret;
        u8 cmd[5];

        /* Move on if no wakeup pin specified */
        if (of_property_read_u16(dev->of_node, "marvell,wakeup-pin", &pin) ||
            of_property_read_u16(dev->of_node, "marvell,wakeup-gap-ms", &gap))
                return 0;

        /* Vendor specific command to configure a GPIO as wake-up pin */
        opcode = hci_opcode_pack(0x3F, 0x59);
        cmd[0] = opcode & 0xFF;
        cmd[1] = opcode >> 8;
        cmd[2] = 2; /* length of parameters that follow */
        cmd[3] = pin;
        cmd[4] = gap; /* time in ms, for which wakeup pin should be asserted */

        skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
        if (!skb) {
                bt_dev_err(hdev, "%s: No memory", __func__);
                return -ENOMEM;
        }

        skb_put_data(skb, cmd, sizeof(cmd));
        hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;

        ret = btusb_send_frame(hdev, skb);
        if (ret) {
                bt_dev_err(hdev, "%s: configuration failed", __func__);
                kfree_skb(skb);
                return ret;
        }

        return 0;
}
#endif

static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
                                    const bdaddr_t *bdaddr)
{
        struct sk_buff *skb;
        u8 buf[8];
        long ret;

        buf[0] = 0xfe;
        buf[1] = sizeof(bdaddr_t);
        memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));

        skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                ret = PTR_ERR(skb);
                bt_dev_err(hdev, "changing Marvell device address failed (%ld)",
                           ret);
                return ret;
        }
        kfree_skb(skb);

        return 0;
}

static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
                                    const bdaddr_t *bdaddr)
{
        struct sk_buff *skb;
        u8 buf[10];
        long ret;

        buf[0] = 0x01;
        buf[1] = 0x01;
        buf[2] = 0x00;
        buf[3] = sizeof(bdaddr_t);
        memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));

        skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                ret = PTR_ERR(skb);
                bt_dev_err(hdev, "Change address command failed (%ld)", ret);
                return ret;
        }
        kfree_skb(skb);

        return 0;
}

static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev,
                                const bdaddr_t *bdaddr)
{
        struct sk_buff *skb;
        u8 buf[6];
        long ret;

        memcpy(buf, bdaddr, sizeof(bdaddr_t));

        skb = __hci_cmd_sync_ev(hdev, 0xfc14, sizeof(buf), buf,
                                HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                ret = PTR_ERR(skb);
                bt_dev_err(hdev, "Change address command failed (%ld)", ret);
                return ret;
        }
        kfree_skb(skb);

        return 0;
}

#define QCA_MEMDUMP_ACL_HANDLE 0x2EDD
#define QCA_MEMDUMP_SIZE_MAX  0x100000
#define QCA_MEMDUMP_VSE_CLASS 0x01
#define QCA_MEMDUMP_MSG_TYPE 0x08
#define QCA_MEMDUMP_PKT_SIZE 248
#define QCA_LAST_SEQUENCE_NUM 0xffff

struct qca_dump_hdr {
        u8 vse_class;
        u8 msg_type;
        __le16 seqno;
        u8 reserved;
        union {
                u8 data[0];
                struct {
                        __le32 ram_dump_size;
                        u8 data0[0];
                } __packed;
        };
} __packed;


static void btusb_dump_hdr_qca(struct hci_dev *hdev, struct sk_buff *skb)
{
        char buf[128];
        struct btusb_data *btdata = hci_get_drvdata(hdev);

        snprintf(buf, sizeof(buf), "Controller Name: 0x%x\n",
                        btdata->qca_dump.controller_id);
        skb_put_data(skb, buf, strlen(buf));

        snprintf(buf, sizeof(buf), "Firmware Version: 0x%x\n",
                        btdata->qca_dump.fw_version);
        skb_put_data(skb, buf, strlen(buf));

        snprintf(buf, sizeof(buf), "Driver: %s\nVendor: qca\n",
                        btusb_driver.name);
        skb_put_data(skb, buf, strlen(buf));

        snprintf(buf, sizeof(buf), "VID: 0x%x\nPID:0x%x\n",
                        btdata->qca_dump.id_vendor, btdata->qca_dump.id_product);
        skb_put_data(skb, buf, strlen(buf));

        snprintf(buf, sizeof(buf), "Lmp Subversion: 0x%x\n",
                        hdev->lmp_subver);
        skb_put_data(skb, buf, strlen(buf));
}

static void btusb_coredump_qca(struct hci_dev *hdev)
{
        int err;
        static const u8 param[] = { 0x26 };

        err = __hci_cmd_send(hdev, 0xfc0c, 1, param);
        if (err < 0)
                bt_dev_err(hdev, "%s: triggle crash failed (%d)", __func__, err);
}

/* Return: 0 on success, negative errno on failure. */
static int handle_dump_pkt_qca(struct hci_dev *hdev, struct sk_buff *skb)
{
        int ret = 0;
        unsigned int skip = 0;
        u8 pkt_type;
        u16 seqno;
        u32 dump_size;

        struct qca_dump_hdr *dump_hdr;
        struct btusb_data *btdata = hci_get_drvdata(hdev);
        struct usb_device *udev = btdata->udev;

        pkt_type = hci_skb_pkt_type(skb);
        skip = sizeof(struct hci_event_hdr);
        if (pkt_type == HCI_ACLDATA_PKT)
                skip += sizeof(struct hci_acl_hdr);

        skb_pull(skb, skip);
        dump_hdr = (struct qca_dump_hdr *)skb->data;

        seqno = le16_to_cpu(dump_hdr->seqno);
        if (seqno == 0) {
                set_bit(BTUSB_HW_SSR_ACTIVE, &btdata->flags);
                dump_size = le32_to_cpu(dump_hdr->ram_dump_size);
                if (!dump_size || (dump_size > QCA_MEMDUMP_SIZE_MAX)) {
                        ret = -EILSEQ;
                        bt_dev_err(hdev, "Invalid memdump size(%u)",
                                   dump_size);
                        goto out;
                }

                ret = hci_devcd_init(hdev, dump_size);
                if (ret < 0) {
                        bt_dev_err(hdev, "memdump init error(%d)", ret);
                        goto out;
                }

                btdata->qca_dump.ram_dump_size = dump_size;
                btdata->qca_dump.ram_dump_seqno = 0;

                skb_pull(skb, offsetof(struct qca_dump_hdr, data0));

                usb_disable_autosuspend(udev);
                bt_dev_info(hdev, "%s memdump size(%u)\n",
                            (pkt_type == HCI_ACLDATA_PKT) ? "ACL" : "event",
                            dump_size);
        } else {
                skb_pull(skb, offsetof(struct qca_dump_hdr, data));
        }

        if (!btdata->qca_dump.ram_dump_size) {
                ret = -EINVAL;
                bt_dev_err(hdev, "memdump is not active");
                goto out;
        }

        if ((seqno > btdata->qca_dump.ram_dump_seqno + 1) && (seqno != QCA_LAST_SEQUENCE_NUM)) {
                dump_size = QCA_MEMDUMP_PKT_SIZE * (seqno - btdata->qca_dump.ram_dump_seqno - 1);
                hci_devcd_append_pattern(hdev, 0x0, dump_size);
                bt_dev_err(hdev,
                           "expected memdump seqno(%u) is not received(%u)\n",
                           btdata->qca_dump.ram_dump_seqno, seqno);
                btdata->qca_dump.ram_dump_seqno = seqno;
                kfree_skb(skb);
                return ret;
        }

        hci_devcd_append(hdev, skb);
        btdata->qca_dump.ram_dump_seqno++;
        if (seqno == QCA_LAST_SEQUENCE_NUM) {
                bt_dev_info(hdev,
                                "memdump done: pkts(%u), total(%u)\n",
                                btdata->qca_dump.ram_dump_seqno, btdata->qca_dump.ram_dump_size);

                hci_devcd_complete(hdev);
                goto out;
        }
        return ret;

out:
        if (btdata->qca_dump.ram_dump_size)
                usb_enable_autosuspend(udev);
        btdata->qca_dump.ram_dump_size = 0;
        btdata->qca_dump.ram_dump_seqno = 0;
        clear_bit(BTUSB_HW_SSR_ACTIVE, &btdata->flags);

        if (ret < 0)
                kfree_skb(skb);
        return ret;
}

/* Return: true if the ACL packet is a dump packet, false otherwise. */
static bool acl_pkt_is_dump_qca(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct hci_event_hdr *event_hdr;
        struct hci_acl_hdr *acl_hdr;
        struct qca_dump_hdr *dump_hdr;
        struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
        bool is_dump = false;

        if (!clone)
                return false;

        acl_hdr = skb_pull_data(clone, sizeof(*acl_hdr));
        if (!acl_hdr || (le16_to_cpu(acl_hdr->handle) != QCA_MEMDUMP_ACL_HANDLE))
                goto out;

        event_hdr = skb_pull_data(clone, sizeof(*event_hdr));
        if (!event_hdr || (event_hdr->evt != HCI_VENDOR_PKT))
                goto out;

        dump_hdr = skb_pull_data(clone, sizeof(*dump_hdr));
        if (!dump_hdr || (dump_hdr->vse_class != QCA_MEMDUMP_VSE_CLASS) ||
           (dump_hdr->msg_type != QCA_MEMDUMP_MSG_TYPE))
                goto out;

        is_dump = true;
out:
        consume_skb(clone);
        return is_dump;
}

/* Return: true if the event packet is a dump packet, false otherwise. */
static bool evt_pkt_is_dump_qca(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct hci_event_hdr *event_hdr;
        struct qca_dump_hdr *dump_hdr;
        struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
        bool is_dump = false;

        if (!clone)
                return false;

        event_hdr = skb_pull_data(clone, sizeof(*event_hdr));
        if (!event_hdr || (event_hdr->evt != HCI_VENDOR_PKT))
                goto out;

        dump_hdr = skb_pull_data(clone, sizeof(*dump_hdr));
        if (!dump_hdr || (dump_hdr->vse_class != QCA_MEMDUMP_VSE_CLASS) ||
           (dump_hdr->msg_type != QCA_MEMDUMP_MSG_TYPE))
                goto out;

        is_dump = true;
out:
        consume_skb(clone);
        return is_dump;
}

static int btusb_recv_acl_qca(struct hci_dev *hdev, struct sk_buff *skb)
{
        if (acl_pkt_is_dump_qca(hdev, skb))
                return handle_dump_pkt_qca(hdev, skb);
        return hci_recv_frame(hdev, skb);
}

static int btusb_recv_evt_qca(struct hci_dev *hdev, struct sk_buff *skb)
{
        if (evt_pkt_is_dump_qca(hdev, skb))
                return handle_dump_pkt_qca(hdev, skb);
        return hci_recv_frame(hdev, skb);
}


#define QCA_DFU_PACKET_LEN      4096

#define QCA_GET_TARGET_VERSION  0x09
#define QCA_CHECK_STATUS        0x05
#define QCA_DFU_DOWNLOAD        0x01

#define QCA_SYSCFG_UPDATED      0x40
#define QCA_PATCH_UPDATED       0x80
#define QCA_DFU_TIMEOUT         3000
#define QCA_FLAG_MULTI_NVM      0x80
#define QCA_BT_RESET_WAIT_MS    100

#define WCN6855_2_0_RAM_VERSION_GF 0x400c1200
#define WCN6855_2_1_RAM_VERSION_GF 0x400c1211

struct qca_version {
        __le32  rom_version;
        __le32  patch_version;
        __le32  ram_version;
        __u8    chip_id;
        __u8    platform_id;
        __le16  flag;
        __u8    reserved[4];
} __packed;

struct qca_rampatch_version {
        __le16  rom_version_high;
        __le16  rom_version_low;
        __le16  patch_version;
} __packed;

struct qca_device_info {
        u32     rom_version;
        u8      rampatch_hdr;   /* length of header in rampatch */
        u8      nvm_hdr;        /* length of header in NVM */
        u8      ver_offset;     /* offset of version structure in rampatch */
};

struct qca_custom_firmware {
        u32 rom_version;
        u16 board_id;
        const char *subdirectory;
};

static const struct qca_device_info qca_devices_table[] = {
        { 0x00000100, 20, 4,  8 }, /* Rome 1.0 */
        { 0x00000101, 20, 4,  8 }, /* Rome 1.1 */
        { 0x00000200, 28, 4, 16 }, /* Rome 2.0 */
        { 0x00000201, 28, 4, 16 }, /* Rome 2.1 */
        { 0x00000300, 28, 4, 16 }, /* Rome 3.0 */
        { 0x00000302, 28, 4, 16 }, /* Rome 3.2 */
        { 0x00130100, 40, 4, 16 }, /* WCN6855 1.0 */
        { 0x00130200, 40, 4, 16 }, /* WCN6855 2.0 */
        { 0x00130201, 40, 4, 16 }, /* WCN6855 2.1 */
        { 0x00190200, 40, 4, 16 }, /* WCN785x 2.0 */
};

static const struct qca_custom_firmware qca_custom_btfws[] = {
        { 0x00130201, 0x030A, "QCA2066" },
        { 0x00130201, 0x030B, "QCA2066" },
        { },
};

static u16 qca_extract_board_id(const struct qca_version *ver)
{
        u16 flag = le16_to_cpu(ver->flag);
        u16 board_id = 0;

        if (((flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) {
                /* The board_id should be split into two bytes
                 * The 1st byte is chip ID, and the 2nd byte is platform ID
                 * For example, board ID 0x010A, 0x01 is platform ID. 0x0A is chip ID
                 * we have several platforms, and platform IDs are continuously added
                 * Platform ID:
                 * 0x00 is for Mobile
                 * 0x01 is for X86
                 * 0x02 is for Automotive
                 * 0x03 is for Consumer electronic
                 */
                board_id = (ver->chip_id << 8) + ver->platform_id;
        }

        /* Take 0xffff as invalid board ID */
        if (board_id == 0xffff)
                board_id = 0;

        return board_id;
}

static const char *qca_get_fw_subdirectory(const struct qca_version *ver)
{
        const struct qca_custom_firmware *ptr;
        u32 rom_ver;
        u16 board_id;

        rom_ver = le32_to_cpu(ver->rom_version);
        board_id = qca_extract_board_id(ver);
        if (!board_id)
                return NULL;

        for (ptr = qca_custom_btfws; ptr->rom_version; ptr++) {
                if (ptr->rom_version == rom_ver &&
                    ptr->board_id == board_id)
                        return ptr->subdirectory;
        }

        return NULL;
}

static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 request,
                                     void *data, u16 size)
{
        int pipe, err;
        u8 *buf;

        buf = kmalloc(size, GFP_KERNEL);
        if (!buf)
                return -ENOMEM;

        /* Found some of USB hosts have IOT issues with ours so that we should
         * not wait until HCI layer is ready.
         */
        pipe = usb_rcvctrlpipe(udev, 0);
        err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
                              0, 0, buf, size, USB_CTRL_GET_TIMEOUT);
        if (err < 0) {
                dev_err(&udev->dev, "Failed to access otp area (%d)", err);
                goto done;
        }

        memcpy(data, buf, size);

done:
        kfree(buf);

        return err;
}

static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
                                       const struct firmware *firmware,
                                       size_t hdr_size)
{
        struct btusb_data *btdata = hci_get_drvdata(hdev);
        struct usb_device *udev = btdata->udev;
        size_t count, size, sent = 0;
        int pipe, len, err;
        u8 *buf;

        buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
        if (!buf)
                return -ENOMEM;

        count = firmware->size;

        size = min_t(size_t, count, hdr_size);
        memcpy(buf, firmware->data, size);

        /* USB patches should go down to controller through USB path
         * because binary format fits to go down through USB channel.
         * USB control path is for patching headers and USB bulk is for
         * patch body.
         */
        pipe = usb_sndctrlpipe(udev, 0);
        err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
                              0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
        if (err < 0) {
                bt_dev_err(hdev, "Failed to send headers (%d)", err);
                goto done;
        }

        sent += size;
        count -= size;

        /* ep2 need time to switch from function acl to function dfu,
         * so we add 20ms delay here.
         */
        msleep(20);

        while (count) {
                size = min_t(size_t, count, QCA_DFU_PACKET_LEN);

                memcpy(buf, firmware->data + sent, size);

                pipe = usb_sndbulkpipe(udev, 0x02);
                err = usb_bulk_msg(udev, pipe, buf, size, &len,
                                   QCA_DFU_TIMEOUT);
                if (err < 0) {
                        bt_dev_err(hdev, "Failed to send body at %zd of %zd (%d)",
                                   sent, firmware->size, err);
                        break;
                }

                if (size != len) {
                        bt_dev_err(hdev, "Failed to get bulk buffer");
                        err = -EILSEQ;
                        break;
                }

                sent  += size;
                count -= size;
        }

done:
        kfree(buf);
        return err;
}

static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
                                         struct qca_version *ver,
                                         const struct qca_device_info *info)
{
        struct qca_rampatch_version *rver;
        const struct firmware *fw;
        const char *fw_subdir;
        u32 ver_rom, ver_patch, rver_rom;
        u16 rver_rom_low, rver_rom_high, rver_patch;
        char fwname[80];
        int err;

        ver_rom = le32_to_cpu(ver->rom_version);
        ver_patch = le32_to_cpu(ver->patch_version);

        fw_subdir = qca_get_fw_subdirectory(ver);
        if (fw_subdir)
                snprintf(fwname, sizeof(fwname), "qca/%s/rampatch_usb_%08x.bin",
                         fw_subdir, ver_rom);
        else
                snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin",
                         ver_rom);

        err = request_firmware(&fw, fwname, &hdev->dev);
        if (err) {
                bt_dev_err(hdev, "failed to request rampatch file: %s (%d)",
                           fwname, err);
                return err;
        }

        bt_dev_info(hdev, "using rampatch file: %s", fwname);

        rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
        rver_rom_low = le16_to_cpu(rver->rom_version_low);
        rver_patch = le16_to_cpu(rver->patch_version);

        if (ver_rom & ~0xffffU) {
                rver_rom_high = le16_to_cpu(rver->rom_version_high);
                rver_rom = rver_rom_high << 16 | rver_rom_low;
        } else {
                rver_rom = rver_rom_low;
        }

        bt_dev_info(hdev, "QCA: patch rome 0x%x build 0x%x, "
                    "firmware rome 0x%x build 0x%x",
                    rver_rom, rver_patch, ver_rom, ver_patch);

        if (rver_rom != ver_rom || rver_patch <= ver_patch) {
                bt_dev_err(hdev, "rampatch file version did not match with firmware");
                err = -EINVAL;
                goto done;
        }

        err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);

done:
        release_firmware(fw);

        return err;
}

static void btusb_generate_qca_nvm_name(char *fwname, size_t max_size,
                                        const struct qca_version *ver)
{
        u32 rom_version = le32_to_cpu(ver->rom_version);
        const char *variant, *fw_subdir;
        int len;
        u16 board_id;

        fw_subdir = qca_get_fw_subdirectory(ver);
        board_id = qca_extract_board_id(ver);

        switch (le32_to_cpu(ver->ram_version)) {
        case WCN6855_2_0_RAM_VERSION_GF:
        case WCN6855_2_1_RAM_VERSION_GF:
                variant = "_gf";
                break;
        default:
                variant = NULL;
                break;
        }

        if (fw_subdir)
                len = snprintf(fwname, max_size, "qca/%s/nvm_usb_%08x",
                               fw_subdir, rom_version);
        else
                len = snprintf(fwname, max_size, "qca/nvm_usb_%08x",
                               rom_version);
        if (variant)
                len += snprintf(fwname + len, max_size - len, "%s", variant);
        if (board_id)
                len += snprintf(fwname + len, max_size - len, "_%04x", board_id);
        len += snprintf(fwname + len, max_size - len, ".bin");
}

static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
                                    struct qca_version *ver,
                                    const struct qca_device_info *info)
{
        const struct firmware *fw;
        char fwname[80];
        int err;

        btusb_generate_qca_nvm_name(fwname, sizeof(fwname), ver);

        err = request_firmware(&fw, fwname, &hdev->dev);
        if (err) {
                bt_dev_err(hdev, "failed to request NVM file: %s (%d)",
                           fwname, err);
                return err;
        }

        bt_dev_info(hdev, "using NVM file: %s", fwname);

        err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);

        release_firmware(fw);

        return err;
}

/* identify the ROM version and check whether patches are needed */
static bool btusb_qca_need_patch(struct usb_device *udev)
{
        struct qca_version ver;

        if (btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
                                      sizeof(ver)) < 0)
                return false;
        /* only low ROM versions need patches */
        return !(le32_to_cpu(ver.rom_version) & ~0xffffU);
}

static int btusb_setup_qca(struct hci_dev *hdev)
{
        struct btusb_data *btdata = hci_get_drvdata(hdev);
        struct usb_device *udev = btdata->udev;
        const struct qca_device_info *info = NULL;
        struct qca_version ver;
        u32 ver_rom;
        u8 status;
        int i, err;

        err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
                                        sizeof(ver));
        if (err < 0)
                return err;

        ver_rom = le32_to_cpu(ver.rom_version);

        for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
                if (ver_rom == qca_devices_table[i].rom_version)
                        info = &qca_devices_table[i];
        }
        if (!info) {
                /* If the rom_version is not matched in the qca_devices_table
                 * and the high ROM version is not zero, we assume this chip no
                 * need to load the rampatch and nvm.
                 */
                if (ver_rom & ~0xffffU)
                        return 0;

                bt_dev_err(hdev, "don't support firmware rome 0x%x", ver_rom);
                return -ENODEV;
        }

        err = btusb_qca_send_vendor_req(udev, QCA_CHECK_STATUS, &status,
                                        sizeof(status));
        if (err < 0)
                return err;

        if (!(status & QCA_PATCH_UPDATED)) {
                err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
                if (err < 0)
                        return err;
        }

        err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
                                        sizeof(ver));
        if (err < 0)
                return err;

        btdata->qca_dump.fw_version = le32_to_cpu(ver.patch_version);
        btdata->qca_dump.controller_id = le32_to_cpu(ver.rom_version);

        if (!(status & QCA_SYSCFG_UPDATED)) {
                err = btusb_setup_qca_load_nvm(hdev, &ver, info);
                if (err < 0)
                        return err;

                /* WCN6855 2.1 and later will reset to apply firmware downloaded here, so
                 * wait ~100ms for reset Done then go ahead, otherwise, it maybe
                 * cause potential enable failure.
                 */
                if (info->rom_version >= 0x00130201)
                        msleep(QCA_BT_RESET_WAIT_MS);
        }

        /* Mark HCI_OP_ENHANCED_SETUP_SYNC_CONN as broken as it doesn't seem to
         * work with the likes of HSP/HFP mSBC.
         */
        hci_set_quirk(hdev, HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN);

        return 0;
}

static inline int __set_diag_interface(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct usb_interface *intf = data->diag;
        int i;

        if (!data->diag)
                return -ENODEV;

        data->diag_tx_ep = NULL;
        data->diag_rx_ep = NULL;

        for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
                struct usb_endpoint_descriptor *ep_desc;

                ep_desc = &intf->cur_altsetting->endpoint[i].desc;

                if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
                        data->diag_tx_ep = ep_desc;
                        continue;
                }

                if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
                        data->diag_rx_ep = ep_desc;
                        continue;
                }
        }

        if (!data->diag_tx_ep || !data->diag_rx_ep) {
                bt_dev_err(hdev, "invalid diagnostic descriptors");
                return -ENODEV;
        }

        return 0;
}

static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct sk_buff *skb;
        struct urb *urb;
        unsigned int pipe;

        if (!data->diag_tx_ep)
                return ERR_PTR(-ENODEV);

        urb = usb_alloc_urb(0, GFP_KERNEL);
        if (!urb)
                return ERR_PTR(-ENOMEM);

        skb = bt_skb_alloc(2, GFP_KERNEL);
        if (!skb) {
                usb_free_urb(urb);
                return ERR_PTR(-ENOMEM);
        }

        skb_put_u8(skb, 0xf0);
        skb_put_u8(skb, enable);

        pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);

        usb_fill_bulk_urb(urb, data->udev, pipe,
                          skb->data, skb->len, btusb_tx_complete, skb);

        skb->dev = (void *)hdev;

        return urb;
}

static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct urb *urb;

        if (!data->diag)
                return -ENODEV;

        if (!test_bit(HCI_RUNNING, &hdev->flags))
                return -ENETDOWN;

        urb = alloc_diag_urb(hdev, enable);
        if (IS_ERR(urb))
                return PTR_ERR(urb);

        return submit_or_queue_tx_urb(hdev, urb);
}

#ifdef CONFIG_PM
static irqreturn_t btusb_oob_wake_handler(int irq, void *priv)
{
        struct btusb_data *data = priv;

        pm_wakeup_event(&data->udev->dev, 0);
        pm_system_wakeup();

        /* Disable only if not already disabled (keep it balanced) */
        if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
                disable_irq_nosync(irq);
                disable_irq_wake(irq);
        }
        return IRQ_HANDLED;
}

static const struct of_device_id btusb_match_table[] = {
        { .compatible = "usb1286,204e" },
        { .compatible = "usbcf3,e300" }, /* QCA6174A */
        { .compatible = "usb4ca,301a" }, /* QCA6174A (Lite-On) */
        { }
};
MODULE_DEVICE_TABLE(of, btusb_match_table);

/* Use an oob wakeup pin? */
static int btusb_config_oob_wake(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);
        struct device *dev = &data->udev->dev;
        int irq, ret;

        clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);

        if (!of_match_device(btusb_match_table, dev))
                return 0;

        /* Move on if no IRQ specified */
        irq = of_irq_get_byname(dev->of_node, "wakeup");
        if (irq <= 0) {
                bt_dev_dbg(hdev, "%s: no OOB Wakeup IRQ in DT", __func__);
                return 0;
        }

        irq_set_status_flags(irq, IRQ_NOAUTOEN);
        ret = devm_request_irq(&hdev->dev, irq, btusb_oob_wake_handler,
                               0, "OOB Wake-on-BT", data);
        if (ret) {
                bt_dev_err(hdev, "%s: IRQ request failed", __func__);
                return ret;
        }

        ret = device_init_wakeup(dev, true);
        if (ret) {
                bt_dev_err(hdev, "%s: failed to init_wakeup", __func__);
                return ret;
        }

        data->oob_wake_irq = irq;
        bt_dev_info(hdev, "OOB Wake-on-BT configured at IRQ %u", irq);
        return 0;
}
#endif

static void btusb_check_needs_reset_resume(struct usb_interface *intf)
{
        if (dmi_check_system(btusb_needs_reset_resume_table))
                interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
}

static bool btusb_wakeup(struct hci_dev *hdev)
{
        struct btusb_data *data = hci_get_drvdata(hdev);

        return device_may_wakeup(&data->udev->dev);
}

static int btusb_shutdown_qca(struct hci_dev *hdev)
{
        struct sk_buff *skb;

        skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
        if (IS_ERR(skb)) {
                bt_dev_err(hdev, "HCI reset during shutdown failed");
                return PTR_ERR(skb);
        }
        kfree_skb(skb);

        return 0;
}

static ssize_t force_poll_sync_read(struct file *file, char __user *user_buf,
                                    size_t count, loff_t *ppos)
{
        struct btusb_data *data = file->private_data;
        char buf[3];

        buf[0] = data->poll_sync ? 'Y' : 'N';
        buf[1] = '\n';
        buf[2] = '\0';
        return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
}

static ssize_t force_poll_sync_write(struct file *file,
                                     const char __user *user_buf,
                                     size_t count, loff_t *ppos)
{
        struct btusb_data *data = file->private_data;
        bool enable;
        int err;

        err = kstrtobool_from_user(user_buf, count, &enable);
        if (err)
                return err;

        /* Only allow changes while the adapter is down */
        if (test_bit(HCI_UP, &data->hdev->flags))
                return -EPERM;

        if (data->poll_sync == enable)
                return -EALREADY;

        data->poll_sync = enable;

        return count;
}

static const struct file_operations force_poll_sync_fops = {
        .owner          = THIS_MODULE,
        .open           = simple_open,
        .read           = force_poll_sync_read,
        .write          = force_poll_sync_write,
        .llseek         = default_llseek,
};

#define BTUSB_HCI_DRV_OP_SUPPORTED_ALTSETTINGS \
                hci_opcode_pack(HCI_DRV_OGF_DRIVER_SPECIFIC, 0x0000)
#define BTUSB_HCI_DRV_SUPPORTED_ALTSETTINGS_SIZE        0
struct btusb_hci_drv_rp_supported_altsettings {
        __u8    num;
        __u8    altsettings[];
} __packed;

#define BTUSB_HCI_DRV_OP_SWITCH_ALTSETTING \
                hci_opcode_pack(HCI_DRV_OGF_DRIVER_SPECIFIC, 0x0001)
#define BTUSB_HCI_DRV_SWITCH_ALTSETTING_SIZE            1
struct btusb_hci_drv_cmd_switch_altsetting {
        __u8    altsetting;
} __packed;

static const struct {
        u16 opcode;
        const char *desc;
} btusb_hci_drv_supported_commands[] = {
        /* Common commands */
        { HCI_DRV_OP_READ_INFO, "Read Info" },

        /* Driver specific commands */
        { BTUSB_HCI_DRV_OP_SUPPORTED_ALTSETTINGS, "Supported Altsettings" },
        { BTUSB_HCI_DRV_OP_SWITCH_ALTSETTING,     "Switch Altsetting" },
};
static int btusb_hci_drv_read_info(struct hci_dev *hdev, void *data,
                                   u16 data_len)
{
        struct hci_drv_rp_read_info *rp;
        size_t rp_size;
        int err, i;
        u16 opcode, num_supported_commands =
                ARRAY_SIZE(btusb_hci_drv_supported_commands);

        rp_size = sizeof(*rp) + num_supported_commands * 2;

        rp = kmalloc(rp_size, GFP_KERNEL);
        if (!rp)
                return -ENOMEM;

        strscpy_pad(rp->driver_name, btusb_driver.name);

        rp->num_supported_commands = cpu_to_le16(num_supported_commands);
        for (i = 0; i < num_supported_commands; i++) {
                opcode = btusb_hci_drv_supported_commands[i].opcode;
                bt_dev_info(hdev,
                            "Supported HCI Drv command (0x%02x|0x%04x): %s",
                            hci_opcode_ogf(opcode),
                            hci_opcode_ocf(opcode),
                            btusb_hci_drv_supported_commands[i].desc);
                rp->supported_commands[i] = cpu_to_le16(opcode);
        }

        err = hci_drv_cmd_complete(hdev, HCI_DRV_OP_READ_INFO,
                                   HCI_DRV_STATUS_SUCCESS, rp, rp_size);

        kfree(rp);
        return err;
}

static int btusb_hci_drv_supported_altsettings(struct hci_dev *hdev, void *data,
                                               u16 data_len)
{
        struct btusb_data *drvdata = hci_get_drvdata(hdev);
        struct btusb_hci_drv_rp_supported_altsettings *rp;
        size_t rp_size;
        int err;
        u8 i;

        /* There are at most 7 alt (0 - 6) */
        rp = kmalloc(sizeof(*rp) + 7, GFP_KERNEL);
        if (!rp)
                return -ENOMEM;

        rp->num = 0;
        if (!drvdata->isoc)
                goto done;

        for (i = 0; i <= 6; i++) {
                if (btusb_find_altsetting(drvdata, i))
                        rp->altsettings[rp->num++] = i;
        }

done:
        rp_size = sizeof(*rp) + rp->num;

        err = hci_drv_cmd_complete(hdev, BTUSB_HCI_DRV_OP_SUPPORTED_ALTSETTINGS,
                                   HCI_DRV_STATUS_SUCCESS, rp, rp_size);
        kfree(rp);
        return err;
}

static int btusb_hci_drv_switch_altsetting(struct hci_dev *hdev, void *data,
                                           u16 data_len)
{
        struct btusb_hci_drv_cmd_switch_altsetting *cmd = data;
        u8 status;

        if (cmd->altsetting > 6) {
                status = HCI_DRV_STATUS_INVALID_PARAMETERS;
        } else {
                if (btusb_switch_alt_setting(hdev, cmd->altsetting))
                        status = HCI_DRV_STATUS_UNSPECIFIED_ERROR;
                else
                        status = HCI_DRV_STATUS_SUCCESS;
        }

        return hci_drv_cmd_status(hdev, BTUSB_HCI_DRV_OP_SWITCH_ALTSETTING,
                                  status);
}

static const struct hci_drv_handler btusb_hci_drv_common_handlers[] = {
        { btusb_hci_drv_read_info,      HCI_DRV_READ_INFO_SIZE },
};

static const struct hci_drv_handler btusb_hci_drv_specific_handlers[] = {
        { btusb_hci_drv_supported_altsettings,
                                BTUSB_HCI_DRV_SUPPORTED_ALTSETTINGS_SIZE },
        { btusb_hci_drv_switch_altsetting,
                                BTUSB_HCI_DRV_SWITCH_ALTSETTING_SIZE },
};

static struct hci_drv btusb_hci_drv = {
        .common_handler_count   = ARRAY_SIZE(btusb_hci_drv_common_handlers),
        .common_handlers        = btusb_hci_drv_common_handlers,
        .specific_handler_count = ARRAY_SIZE(btusb_hci_drv_specific_handlers),
        .specific_handlers      = btusb_hci_drv_specific_handlers,
};

static int btusb_probe(struct usb_interface *intf,
                       const struct usb_device_id *id)
{
        struct usb_endpoint_descriptor *ep_desc;
        struct gpio_desc *reset_gpio;
        struct btusb_data *data;
        struct hci_dev *hdev;
        unsigned ifnum_base;
        int i, err, priv_size;

        BT_DBG("intf %p id %p", intf, id);

        if ((id->driver_info & BTUSB_IFNUM_2) &&
            (intf->cur_altsetting->desc.bInterfaceNumber != 0) &&
            (intf->cur_altsetting->desc.bInterfaceNumber != 2))
                return -ENODEV;

        ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;

        if (!id->driver_info) {
                const struct usb_device_id *match;

                match = usb_match_id(intf, quirks_table);
                if (match)
                        id = match;
        }

        if (id->driver_info == BTUSB_IGNORE)
                return -ENODEV;

        if (id->driver_info & BTUSB_ATH3012) {
                struct usb_device *udev = interface_to_usbdev(intf);

                /* Old firmware would otherwise let ath3k driver load
                 * patch and sysconfig files
                 */
                if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001 &&
                    !btusb_qca_need_patch(udev))
                        return -ENODEV;
        }

        data = kzalloc_obj(*data);
        if (!data)
                return -ENOMEM;

        for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
                ep_desc = &intf->cur_altsetting->endpoint[i].desc;

                if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
                        data->intr_ep = ep_desc;
                        continue;
                }

                if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
                        data->bulk_tx_ep = ep_desc;
                        continue;
                }

                if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
                        data->bulk_rx_ep = ep_desc;
                        continue;
                }
        }

        if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
                kfree(data);
                return -ENODEV;
        }

        if (id->driver_info & BTUSB_AMP) {
                data->cmdreq_type = USB_TYPE_CLASS | 0x01;
                data->cmdreq = 0x2b;
        } else {
                data->cmdreq_type = USB_TYPE_CLASS;
                data->cmdreq = 0x00;
        }

        data->udev = interface_to_usbdev(intf);
        data->intf = intf;

        INIT_WORK(&data->work, btusb_work);
        INIT_WORK(&data->waker, btusb_waker);
        INIT_DELAYED_WORK(&data->rx_work, btusb_rx_work);

        skb_queue_head_init(&data->acl_q);

        init_usb_anchor(&data->deferred);
        init_usb_anchor(&data->tx_anchor);
        spin_lock_init(&data->txlock);

        init_usb_anchor(&data->intr_anchor);
        init_usb_anchor(&data->bulk_anchor);
        init_usb_anchor(&data->isoc_anchor);
        init_usb_anchor(&data->diag_anchor);
        init_usb_anchor(&data->ctrl_anchor);
        spin_lock_init(&data->rxlock);

        priv_size = 0;

        data->recv_event = hci_recv_frame;
        data->recv_bulk = btusb_recv_bulk;

        if (id->driver_info & BTUSB_INTEL_COMBINED) {
                /* Allocate extra space for Intel device */
                priv_size += sizeof(struct btintel_data);

                /* Override the rx handlers */
                data->recv_event = btintel_recv_event;
                data->recv_bulk = btusb_recv_bulk_intel;
        } else if (id->driver_info & BTUSB_REALTEK) {
                /* Allocate extra space for Realtek device */
                priv_size += sizeof(struct btrealtek_data);

                data->recv_event = btusb_recv_event_realtek;
        } else if (id->driver_info & BTUSB_MEDIATEK) {
                /* Allocate extra space for Mediatek device */
                priv_size += sizeof(struct btmtk_data);
        }

        data->recv_acl = hci_recv_frame;

        hdev = hci_alloc_dev_priv(priv_size);
        if (!hdev) {
                kfree(data);
                return -ENOMEM;
        }

        hdev->bus = HCI_USB;
        hci_set_drvdata(hdev, data);

        data->hdev = hdev;

        SET_HCIDEV_DEV(hdev, &intf->dev);

        reset_gpio = gpiod_get_optional(&data->udev->dev, "reset",
                                        GPIOD_OUT_LOW);
        if (IS_ERR(reset_gpio)) {
                err = PTR_ERR(reset_gpio);
                goto out_free_dev;
        } else if (reset_gpio) {
                data->reset_gpio = reset_gpio;
        }

        hdev->open    = btusb_open;
        hdev->close   = btusb_close;
        hdev->flush   = btusb_flush;
        hdev->send    = btusb_send_frame;
        hdev->notify  = btusb_notify;
        hdev->wakeup  = btusb_wakeup;
        hdev->hci_drv = &btusb_hci_drv;

#ifdef CONFIG_PM
        err = btusb_config_oob_wake(hdev);
        if (err)
                goto out_free_dev;

        /* Marvell devices may need a specific chip configuration */
        if (id->driver_info & BTUSB_MARVELL && data->oob_wake_irq) {
                err = marvell_config_oob_wake(hdev);
                if (err)
                        goto out_free_dev;
        }
#endif
        if (id->driver_info & BTUSB_CW6622)
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_STORED_LINK_KEY);

        if (id->driver_info & BTUSB_BCM2045)
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_STORED_LINK_KEY);

        if (id->driver_info & BTUSB_BCM92035)
                hdev->setup = btusb_setup_bcm92035;

        if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
            (id->driver_info & BTUSB_BCM_PATCHRAM)) {
                hdev->manufacturer = 15;
                hdev->setup = btbcm_setup_patchram;
                hdev->set_diag = btusb_bcm_set_diag;
                hdev->set_bdaddr = btbcm_set_bdaddr;

                /* Broadcom LM_DIAG Interface numbers are hardcoded */
                data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
        }

        if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
            (id->driver_info & BTUSB_BCM_APPLE)) {
                hdev->manufacturer = 15;
                hdev->setup = btbcm_setup_apple;
                hdev->set_diag = btusb_bcm_set_diag;

                /* Broadcom LM_DIAG Interface numbers are hardcoded */
                data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
        }

        /* Combined Intel Device setup to support multiple setup routine */
        if (id->driver_info & BTUSB_INTEL_COMBINED) {
                err = btintel_configure_setup(hdev, btusb_driver.name);
                if (err)
                        goto out_free_dev;

                /* Transport specific configuration */
                hdev->send = btusb_send_frame_intel;
                hdev->reset = btusb_intel_reset;

                if (id->driver_info & BTUSB_INTEL_NO_WBS_SUPPORT)
                        btintel_set_flag(hdev, INTEL_ROM_LEGACY_NO_WBS_SUPPORT);

                if (id->driver_info & BTUSB_INTEL_BROKEN_INITIAL_NCMD)
                        btintel_set_flag(hdev, INTEL_BROKEN_INITIAL_NCMD);

                if (id->driver_info & BTUSB_INTEL_BROKEN_SHUTDOWN_LED)
                        btintel_set_flag(hdev, INTEL_BROKEN_SHUTDOWN_LED);
        }

        if (id->driver_info & BTUSB_MARVELL)
                hdev->set_bdaddr = btusb_set_bdaddr_marvell;

        if (IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK) &&
            (id->driver_info & BTUSB_MEDIATEK)) {
                hdev->setup = btusb_mtk_setup;
                hdev->shutdown = btusb_mtk_shutdown;
                hdev->manufacturer = 70;
                hdev->reset = btmtk_reset_sync;
                hdev->set_bdaddr = btmtk_set_bdaddr;
                hdev->send = btusb_send_frame_mtk;
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN);
                hci_set_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_SETUP);
                data->recv_acl = btmtk_usb_recv_acl;
                data->suspend = btmtk_usb_suspend;
                data->resume = btmtk_usb_resume;
                data->disconnect = btusb_mtk_disconnect;
        }

        if (id->driver_info & BTUSB_SWAVE) {
                hci_set_quirk(hdev, HCI_QUIRK_FIXUP_INQUIRY_MODE);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_LOCAL_COMMANDS);
        }

        if (id->driver_info & BTUSB_INTEL_BOOT) {
                hdev->manufacturer = 2;
                hci_set_quirk(hdev, HCI_QUIRK_RAW_DEVICE);
        }

        if (id->driver_info & BTUSB_ATH3012) {
                data->setup_on_usb = btusb_setup_qca;
                hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
                hci_set_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY);
                hci_set_quirk(hdev, HCI_QUIRK_STRICT_DUPLICATE_FILTER);
        }

        if (id->driver_info & BTUSB_QCA_ROME) {
                data->setup_on_usb = btusb_setup_qca;
                hdev->shutdown = btusb_shutdown_qca;
                hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
                hdev->reset = btusb_qca_reset;
                hci_set_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY);
                btusb_check_needs_reset_resume(intf);
        }

        if (id->driver_info & BTUSB_QCA_WCN6855) {
                data->qca_dump.id_vendor = id->idVendor;
                data->qca_dump.id_product = id->idProduct;
                data->recv_event = btusb_recv_evt_qca;
                data->recv_acl = btusb_recv_acl_qca;
                hci_devcd_register(hdev, btusb_coredump_qca, btusb_dump_hdr_qca, NULL);
                data->setup_on_usb = btusb_setup_qca;
                hdev->classify_pkt_type = btusb_classify_qca_pkt_type;
                hdev->shutdown = btusb_shutdown_qca;
                hdev->set_bdaddr = btusb_set_bdaddr_wcn6855;
                hdev->reset = btusb_qca_reset;
                hci_set_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY);
                hci_set_msft_opcode(hdev, 0xFD70);
        }

        if (id->driver_info & BTUSB_AMP) {
                /* AMP controllers do not support SCO packets */
                data->isoc = NULL;
        } else {
                /* Interface orders are hardcoded in the specification */
                data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
                data->isoc_ifnum = ifnum_base + 1;
        }

        if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
            (id->driver_info & BTUSB_REALTEK)) {
                btrtl_set_driver_name(hdev, btusb_driver.name);
                hdev->setup = btusb_setup_realtek;
                hdev->shutdown = btrtl_shutdown_realtek;
                hdev->reset = btusb_rtl_reset;
                hdev->hw_error = btusb_rtl_hw_error;

                /* Realtek devices need to set remote wakeup on auto-suspend */
                set_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags);
                set_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags);
        }

        if (id->driver_info & BTUSB_ACTIONS_SEMI) {
                /* Support is advertised, but not implemented */
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_ERR_DATA_REPORTING);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_SET_RPA_TIMEOUT);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_EXT_SCAN);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_READ_ENC_KEY_SIZE);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_EXT_CREATE_CONN);
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT);
        }

        if (!reset)
                hci_set_quirk(hdev, HCI_QUIRK_RESET_ON_CLOSE);

        if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
                if (!disable_scofix)
                        hci_set_quirk(hdev, HCI_QUIRK_FIXUP_BUFFER_SIZE);
        }

        if (id->driver_info & BTUSB_BROKEN_ISOC)
                data->isoc = NULL;

        if (id->driver_info & BTUSB_WIDEBAND_SPEECH)
                hci_set_quirk(hdev, HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED);

        if (id->driver_info & BTUSB_INVALID_LE_STATES)
                hci_set_quirk(hdev, HCI_QUIRK_BROKEN_LE_STATES);

        if (id->driver_info & BTUSB_DIGIANSWER) {
                data->cmdreq_type = USB_TYPE_VENDOR;
                hci_set_quirk(hdev, HCI_QUIRK_RESET_ON_CLOSE);
        }

        if (id->driver_info & BTUSB_CSR) {
                struct usb_device *udev = data->udev;
                u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);

                /* Old firmware would otherwise execute USB reset */
                if (bcdDevice < 0x117)
                        hci_set_quirk(hdev, HCI_QUIRK_RESET_ON_CLOSE);

                /* This must be set first in case we disable it for fakes */
                hci_set_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY);

                /* Fake CSR devices with broken commands */
                if (le16_to_cpu(udev->descriptor.idVendor)  == 0x0a12 &&
                    le16_to_cpu(udev->descriptor.idProduct) == 0x0001)
                        hdev->setup = btusb_setup_csr;
        }

        if (id->driver_info & BTUSB_SNIFFER) {
                struct usb_device *udev = data->udev;

                /* New sniffer firmware has crippled HCI interface */
                if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
                        hci_set_quirk(hdev, HCI_QUIRK_RAW_DEVICE);
        }

        if (id->driver_info & BTUSB_INTEL_BOOT) {
                /* A bug in the bootloader causes that interrupt interface is
                 * only enabled after receiving SetInterface(0, AltSetting=0).
                 */
                err = usb_set_interface(data->udev, 0, 0);
                if (err < 0) {
                        BT_ERR("failed to set interface 0, alt 0 %d", err);
                        goto out_free_dev;
                }
        }

        if (data->isoc) {
                err = usb_driver_claim_interface(&btusb_driver,
                                                 data->isoc, data);
                if (err < 0)
                        goto out_free_dev;
        }

        if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) && data->diag) {
                if (!usb_driver_claim_interface(&btusb_driver,
                                                data->diag, data))
                        __set_diag_interface(hdev);
                else
                        data->diag = NULL;
        }

        if (enable_autosuspend)
                usb_enable_autosuspend(data->udev);

        data->poll_sync = enable_poll_sync;

        err = hci_register_dev(hdev);
        if (err < 0)
                goto out_free_dev;

        usb_set_intfdata(intf, data);

        debugfs_create_file("force_poll_sync", 0644, hdev->debugfs, data,
                            &force_poll_sync_fops);

        return 0;

out_free_dev:
        if (data->reset_gpio)
                gpiod_put(data->reset_gpio);
        hci_free_dev(hdev);
        kfree(data);
        return err;
}

static void btusb_disconnect(struct usb_interface *intf)
{
        struct btusb_data *data = usb_get_intfdata(intf);
        struct hci_dev *hdev;

        BT_DBG("intf %p", intf);

        if (!data)
                return;

        hdev = data->hdev;
        usb_set_intfdata(data->intf, NULL);

        if (data->isoc)
                usb_set_intfdata(data->isoc, NULL);

        if (data->diag)
                usb_set_intfdata(data->diag, NULL);

        if (data->disconnect)
                data->disconnect(hdev);

        hci_unregister_dev(hdev);

        if (data->oob_wake_irq)
                device_init_wakeup(&data->udev->dev, false);
        if (data->reset_gpio)
                gpiod_put(data->reset_gpio);

        if (intf == data->intf) {
                if (data->isoc)
                        usb_driver_release_interface(&btusb_driver, data->isoc);
                if (data->diag)
                        usb_driver_release_interface(&btusb_driver, data->diag);
        } else if (intf == data->isoc) {
                if (data->diag)
                        usb_driver_release_interface(&btusb_driver, data->diag);
                usb_driver_release_interface(&btusb_driver, data->intf);
        } else if (intf == data->diag) {
                if (data->isoc)
                        usb_driver_release_interface(&btusb_driver, data->isoc);
                usb_driver_release_interface(&btusb_driver, data->intf);
        }

        hci_free_dev(hdev);
        kfree(data);
}

static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
{
        struct btusb_data *data = usb_get_intfdata(intf);

        BT_DBG("intf %p", intf);

        /* Don't auto-suspend if there are connections or discovery in
         * progress; external suspend calls shall never fail.
         */
        if (PMSG_IS_AUTO(message) &&
            (hci_conn_count(data->hdev) || hci_discovery_active(data->hdev)))
                return -EBUSY;

        if (data->suspend_count++)
                return 0;

        spin_lock_irq(&data->txlock);
        if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
                set_bit(BTUSB_SUSPENDING, &data->flags);
                spin_unlock_irq(&data->txlock);
        } else {
                spin_unlock_irq(&data->txlock);
                data->suspend_count--;
                return -EBUSY;
        }

        cancel_work_sync(&data->work);

        if (data->suspend)
                data->suspend(data->hdev);

        btusb_stop_traffic(data);
        usb_kill_anchored_urbs(&data->tx_anchor);

        if (data->oob_wake_irq && device_may_wakeup(&data->udev->dev)) {
                set_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
                enable_irq_wake(data->oob_wake_irq);
                enable_irq(data->oob_wake_irq);
        }

        /* For global suspend, Realtek devices lose the loaded fw
         * in them. But for autosuspend, firmware should remain.
         * Actually, it depends on whether the usb host sends
         * set feature (enable wakeup) or not.
         */
        if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags)) {
                if (PMSG_IS_AUTO(message) &&
                    device_can_wakeup(&data->udev->dev))
                        data->udev->do_remote_wakeup = 1;
                else if (!PMSG_IS_AUTO(message) &&
                         !device_may_wakeup(&data->udev->dev)) {
                        data->udev->do_remote_wakeup = 0;
                        data->udev->reset_resume = 1;
                }
        }

        return 0;
}

static void play_deferred(struct btusb_data *data)
{
        struct urb *urb;
        int err;

        while ((urb = usb_get_from_anchor(&data->deferred))) {
                usb_anchor_urb(urb, &data->tx_anchor);

                err = usb_submit_urb(urb, GFP_ATOMIC);
                if (err < 0) {
                        if (err != -EPERM && err != -ENODEV)
                                BT_ERR("%s urb %p submission failed (%d)",
                                       data->hdev->name, urb, -err);
                        kfree(urb->setup_packet);
                        usb_unanchor_urb(urb);
                        usb_free_urb(urb);
                        break;
                }

                data->tx_in_flight++;
                usb_free_urb(urb);
        }

        /* Cleanup the rest deferred urbs. */
        while ((urb = usb_get_from_anchor(&data->deferred))) {
                kfree(urb->setup_packet);
                usb_free_urb(urb);
        }
}

static int btusb_resume(struct usb_interface *intf)
{
        struct btusb_data *data = usb_get_intfdata(intf);
        struct hci_dev *hdev = data->hdev;
        int err = 0;

        BT_DBG("intf %p", intf);

        if (--data->suspend_count)
                return 0;

        /* Disable only if not already disabled (keep it balanced) */
        if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
                disable_irq(data->oob_wake_irq);
                disable_irq_wake(data->oob_wake_irq);
        }

        if (!test_bit(HCI_RUNNING, &hdev->flags))
                goto done;

        if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
                err = btusb_submit_intr_urb(hdev, GFP_NOIO);
                if (err < 0) {
                        clear_bit(BTUSB_INTR_RUNNING, &data->flags);
                        goto failed;
                }
        }

        if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
                err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
                if (err < 0) {
                        clear_bit(BTUSB_BULK_RUNNING, &data->flags);
                        goto failed;
                }

                btusb_submit_bulk_urb(hdev, GFP_NOIO);
        }

        if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
                if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
                        clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
                else
                        btusb_submit_isoc_urb(hdev, GFP_NOIO);
        }

        if (data->resume)
                data->resume(hdev);

        spin_lock_irq(&data->txlock);
        play_deferred(data);
        clear_bit(BTUSB_SUSPENDING, &data->flags);
        spin_unlock_irq(&data->txlock);
        schedule_work(&data->work);

        return 0;

failed:
        usb_scuttle_anchored_urbs(&data->deferred);
done:
        spin_lock_irq(&data->txlock);
        clear_bit(BTUSB_SUSPENDING, &data->flags);
        spin_unlock_irq(&data->txlock);

        return err;
}

#ifdef CONFIG_DEV_COREDUMP
static void btusb_coredump(struct device *dev)
{
        struct btusb_data *data = dev_get_drvdata(dev);
        struct hci_dev *hdev = data->hdev;

        if (hdev->dump.coredump)
                hdev->dump.coredump(hdev);
}
#endif

static struct usb_driver btusb_driver = {
        .name           = "btusb",
        .probe          = btusb_probe,
        .disconnect     = btusb_disconnect,
        .suspend        = pm_ptr(btusb_suspend),
        .resume         = pm_ptr(btusb_resume),
        .id_table       = btusb_table,
        .supports_autosuspend = 1,
        .disable_hub_initiated_lpm = 1,

#ifdef CONFIG_DEV_COREDUMP
        .driver = {
                .coredump = btusb_coredump,
        },
#endif
};

module_usb_driver(btusb_driver);

module_param(disable_scofix, bool, 0644);
MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");

module_param(force_scofix, bool, 0644);
MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");

module_param(enable_autosuspend, bool, 0644);
MODULE_PARM_DESC(enable_autosuspend, "Enable USB autosuspend by default");

module_param(reset, bool, 0644);
MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");

MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");