root/drivers/media/usb/go7007/go7007-usb.c
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2005-2006 Micronas USA Inc.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/usb.h>
#include <linux/i2c.h>
#include <asm/byteorder.h>
#include <media/i2c/saa7115.h>
#include <media/tuner.h>
#include <media/i2c/uda1342.h>

#include "go7007-priv.h"

static unsigned int assume_endura;
module_param(assume_endura, int, 0644);
MODULE_PARM_DESC(assume_endura,
                        "when probing fails, hardware is a Pelco Endura");

/* #define GO7007_I2C_DEBUG */ /* for debugging the EZ-USB I2C adapter */

#define HPI_STATUS_ADDR 0xFFF4
#define INT_PARAM_ADDR  0xFFF6
#define INT_INDEX_ADDR  0xFFF8

/*
 * Pipes on EZ-USB interface:
 *      0 snd - Control
 *      0 rcv - Control
 *      2 snd - Download firmware (control)
 *      4 rcv - Read Interrupt (interrupt)
 *      6 rcv - Read Video (bulk)
 *      8 rcv - Read Audio (bulk)
 */

#define GO7007_USB_EZUSB                (1<<0)
#define GO7007_USB_EZUSB_I2C            (1<<1)

struct go7007_usb_board {
        unsigned int flags;
        struct go7007_board_info main_info;
};

struct go7007_usb {
        const struct go7007_usb_board *board;
        struct mutex i2c_lock;
        struct usb_device *usbdev;
        struct urb *video_urbs[8];
        struct urb *audio_urbs[8];
        struct urb *intr_urb;
};

/*********************** Product specification data ***********************/

static const struct go7007_usb_board board_matrix_ii = {
        .flags          = GO7007_USB_EZUSB,
        .main_info      = {
                .flags           = GO7007_BOARD_HAS_AUDIO |
                                        GO7007_BOARD_USE_ONBOARD_I2C,
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_WORD_16,
                .audio_rate      = 48000,
                .audio_bclk_div  = 8,
                .audio_main_div  = 2,
                .hpi_buffer_cap  = 7,
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_VALID_ENABLE |
                                        GO7007_SENSOR_TV |
                                        GO7007_SENSOR_SAA7115 |
                                        GO7007_SENSOR_VBI |
                                        GO7007_SENSOR_SCALING,
                .num_i2c_devs    = 1,
                .i2c_devs        = {
                        {
                                .type   = "saa7115",
                                .addr   = 0x20,
                                .is_video = 1,
                        },
                },
                .num_inputs      = 2,
                .inputs          = {
                        {
                                .video_input    = 0,
                                .name           = "Composite",
                        },
                        {
                                .video_input    = 9,
                                .name           = "S-Video",
                        },
                },
                .video_config   = SAA7115_IDQ_IS_DEFAULT,
        },
};

static const struct go7007_usb_board board_matrix_reload = {
        .flags          = GO7007_USB_EZUSB,
        .main_info      = {
                .flags           = GO7007_BOARD_HAS_AUDIO |
                                        GO7007_BOARD_USE_ONBOARD_I2C,
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_I2S_MASTER |
                                        GO7007_AUDIO_WORD_16,
                .audio_rate      = 48000,
                .audio_bclk_div  = 8,
                .audio_main_div  = 2,
                .hpi_buffer_cap  = 7,
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_TV,
                .num_i2c_devs    = 1,
                .i2c_devs        = {
                        {
                                .type   = "saa7113",
                                .addr   = 0x25,
                                .is_video = 1,
                        },
                },
                .num_inputs      = 2,
                .inputs          = {
                        {
                                .video_input    = 0,
                                .name           = "Composite",
                        },
                        {
                                .video_input    = 9,
                                .name           = "S-Video",
                        },
                },
                .video_config   = SAA7115_IDQ_IS_DEFAULT,
        },
};

static const struct go7007_usb_board board_star_trek = {
        .flags          = GO7007_USB_EZUSB | GO7007_USB_EZUSB_I2C,
        .main_info      = {
                .flags           = GO7007_BOARD_HAS_AUDIO, /* |
                                        GO7007_BOARD_HAS_TUNER, */
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_VALID_ENABLE |
                                        GO7007_SENSOR_TV |
                                        GO7007_SENSOR_SAA7115 |
                                        GO7007_SENSOR_VBI |
                                        GO7007_SENSOR_SCALING,
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_WORD_16,
                .audio_bclk_div  = 8,
                .audio_main_div  = 2,
                .hpi_buffer_cap  = 7,
                .num_i2c_devs    = 1,
                .i2c_devs        = {
                        {
                                .type   = "saa7115",
                                .addr   = 0x20,
                                .is_video = 1,
                        },
                },
                .num_inputs      = 2,
                .inputs          = {
                /*      {
                 *              .video_input    = 3,
                 *              .audio_index    = AUDIO_TUNER,
                 *              .name           = "Tuner",
                 *      },
                 */
                        {
                                .video_input    = 1,
                        /*      .audio_index    = AUDIO_EXTERN, */
                                .name           = "Composite",
                        },
                        {
                                .video_input    = 8,
                        /*      .audio_index    = AUDIO_EXTERN, */
                                .name           = "S-Video",
                        },
                },
                .video_config   = SAA7115_IDQ_IS_DEFAULT,
        },
};

static const struct go7007_usb_board board_px_tv402u = {
        .flags          = GO7007_USB_EZUSB | GO7007_USB_EZUSB_I2C,
        .main_info      = {
                .flags           = GO7007_BOARD_HAS_AUDIO |
                                        GO7007_BOARD_HAS_TUNER,
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_VALID_ENABLE |
                                        GO7007_SENSOR_TV |
                                        GO7007_SENSOR_SAA7115 |
                                        GO7007_SENSOR_VBI |
                                        GO7007_SENSOR_SCALING,
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_WORD_16,
                .audio_bclk_div  = 8,
                .audio_main_div  = 2,
                .hpi_buffer_cap  = 7,
                .num_i2c_devs    = 5,
                .i2c_devs        = {
                        {
                                .type   = "saa7115",
                                .addr   = 0x20,
                                .is_video = 1,
                        },
                        {
                                .type   = "uda1342",
                                .addr   = 0x1a,
                                .is_audio = 1,
                        },
                        {
                                .type   = "tuner",
                                .addr   = 0x60,
                        },
                        {
                                .type   = "tuner",
                                .addr   = 0x43,
                        },
                        {
                                .type   = "sony-btf-mpx",
                                .addr   = 0x44,
                        },
                },
                .num_inputs      = 3,
                .inputs          = {
                        {
                                .video_input    = 3,
                                .audio_index    = 0,
                                .name           = "Tuner",
                        },
                        {
                                .video_input    = 1,
                                .audio_index    = 1,
                                .name           = "Composite",
                        },
                        {
                                .video_input    = 8,
                                .audio_index    = 1,
                                .name           = "S-Video",
                        },
                },
                .video_config   = SAA7115_IDQ_IS_DEFAULT,
                .num_aud_inputs  = 2,
                .aud_inputs      = {
                        {
                                .audio_input    = UDA1342_IN2,
                                .name           = "Tuner",
                        },
                        {
                                .audio_input    = UDA1342_IN1,
                                .name           = "Line In",
                        },
                },
        },
};

static const struct go7007_usb_board board_xmen = {
        .flags          = 0,
        .main_info      = {
                .flags            = GO7007_BOARD_USE_ONBOARD_I2C,
                .hpi_buffer_cap   = 0,
                .sensor_flags     = GO7007_SENSOR_VREF_POLAR,
                .sensor_width     = 320,
                .sensor_height    = 240,
                .sensor_framerate = 30030,
                .audio_flags      = GO7007_AUDIO_ONE_CHANNEL |
                                        GO7007_AUDIO_I2S_MODE_3 |
                                        GO7007_AUDIO_WORD_14 |
                                        GO7007_AUDIO_I2S_MASTER |
                                        GO7007_AUDIO_BCLK_POLAR |
                                        GO7007_AUDIO_OKI_MODE,
                .audio_rate       = 8000,
                .audio_bclk_div   = 48,
                .audio_main_div   = 1,
                .num_i2c_devs     = 1,
                .i2c_devs         = {
                        {
                                .type   = "ov7640",
                                .addr   = 0x21,
                        },
                },
                .num_inputs       = 1,
                .inputs           = {
                        {
                                .name           = "Camera",
                        },
                },
        },
};

static const struct go7007_usb_board board_matrix_revolution = {
        .flags          = GO7007_USB_EZUSB,
        .main_info      = {
                .flags           = GO7007_BOARD_HAS_AUDIO |
                                        GO7007_BOARD_USE_ONBOARD_I2C,
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_I2S_MASTER |
                                        GO7007_AUDIO_WORD_16,
                .audio_rate      = 48000,
                .audio_bclk_div  = 8,
                .audio_main_div  = 2,
                .hpi_buffer_cap  = 7,
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_TV |
                                        GO7007_SENSOR_VBI,
                .num_i2c_devs    = 1,
                .i2c_devs        = {
                        {
                                .type   = "tw9903",
                                .is_video = 1,
                                .addr   = 0x44,
                        },
                },
                .num_inputs      = 2,
                .inputs          = {
                        {
                                .video_input    = 2,
                                .name           = "Composite",
                        },
                        {
                                .video_input    = 8,
                                .name           = "S-Video",
                        },
                },
        },
};

#if 0
static const struct go7007_usb_board board_lifeview_lr192 = {
        .flags          = GO7007_USB_EZUSB,
        .main_info      = {
                .flags           = GO7007_BOARD_HAS_AUDIO |
                                        GO7007_BOARD_USE_ONBOARD_I2C,
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_WORD_16,
                .audio_rate      = 48000,
                .audio_bclk_div  = 8,
                .audio_main_div  = 2,
                .hpi_buffer_cap  = 7,
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_VALID_ENABLE |
                                        GO7007_SENSOR_TV |
                                        GO7007_SENSOR_VBI |
                                        GO7007_SENSOR_SCALING,
                .num_i2c_devs    = 0,
                .num_inputs      = 1,
                .inputs          = {
                        {
                                .video_input    = 0,
                                .name           = "Composite",
                        },
                },
        },
};
#endif

static const struct go7007_usb_board board_endura = {
        .flags          = 0,
        .main_info      = {
                .flags           = 0,
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_I2S_MASTER |
                                        GO7007_AUDIO_WORD_16,
                .audio_rate      = 8000,
                .audio_bclk_div  = 48,
                .audio_main_div  = 8,
                .hpi_buffer_cap  = 0,
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_TV,
                .sensor_h_offset = 8,
                .num_i2c_devs    = 0,
                .num_inputs      = 1,
                .inputs          = {
                        {
                                .name           = "Camera",
                        },
                },
        },
};

static const struct go7007_usb_board board_adlink_mpg24 = {
        .flags          = 0,
        .main_info      = {
                .flags           = GO7007_BOARD_USE_ONBOARD_I2C,
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_I2S_MASTER |
                                        GO7007_AUDIO_WORD_16,
                .audio_rate      = 48000,
                .audio_bclk_div  = 8,
                .audio_main_div  = 2,
                .hpi_buffer_cap  = 0,
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_TV |
                                        GO7007_SENSOR_VBI,
                .num_i2c_devs    = 1,
                .i2c_devs        = {
                        {
                                .type   = "tw2804",
                                .addr   = 0x00, /* yes, really */
                                .flags  = I2C_CLIENT_TEN,
                                .is_video = 1,
                        },
                },
                .num_inputs      = 1,
                .inputs          = {
                        {
                                .name           = "Composite",
                        },
                },
        },
};

static const struct go7007_usb_board board_sensoray_2250 = {
        .flags          = GO7007_USB_EZUSB | GO7007_USB_EZUSB_I2C,
        .main_info      = {
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_I2S_MASTER |
                                        GO7007_AUDIO_WORD_16,
                .flags           = GO7007_BOARD_HAS_AUDIO,
                .audio_rate      = 48000,
                .audio_bclk_div  = 8,
                .audio_main_div  = 2,
                .hpi_buffer_cap  = 7,
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_TV,
                .num_i2c_devs    = 1,
                .i2c_devs        = {
                        {
                                .type   = "s2250",
                                .addr   = 0x43,
                                .is_video = 1,
                                .is_audio = 1,
                        },
                },
                .num_inputs      = 2,
                .inputs          = {
                        {
                                .video_input    = 0,
                                .name           = "Composite",
                        },
                        {
                                .video_input    = 1,
                                .name           = "S-Video",
                        },
                },
                .num_aud_inputs  = 3,
                .aud_inputs      = {
                        {
                                .audio_input    = 0,
                                .name           = "Line In",
                        },
                        {
                                .audio_input    = 1,
                                .name           = "Mic",
                        },
                        {
                                .audio_input    = 2,
                                .name           = "Mic Boost",
                        },
                },
        },
};

static const struct go7007_usb_board board_ads_usbav_709 = {
        .flags          = GO7007_USB_EZUSB,
        .main_info      = {
                .flags           = GO7007_BOARD_HAS_AUDIO |
                                        GO7007_BOARD_USE_ONBOARD_I2C,
                .audio_flags     = GO7007_AUDIO_I2S_MODE_1 |
                                        GO7007_AUDIO_I2S_MASTER |
                                        GO7007_AUDIO_WORD_16,
                .audio_rate      = 48000,
                .audio_bclk_div  = 8,
                .audio_main_div  = 2,
                .hpi_buffer_cap  = 7,
                .sensor_flags    = GO7007_SENSOR_656 |
                                        GO7007_SENSOR_TV |
                                        GO7007_SENSOR_VBI,
                .num_i2c_devs    = 1,
                .i2c_devs        = {
                        {
                                .type   = "tw9906",
                                .is_video = 1,
                                .addr   = 0x44,
                        },
                },
                .num_inputs      = 2,
                .inputs          = {
                        {
                                .video_input    = 0,
                                .name           = "Composite",
                        },
                        {
                                .video_input    = 10,
                                .name           = "S-Video",
                        },
                },
        },
};

static const struct usb_device_id go7007_usb_id_table[] = {
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION |
                                        USB_DEVICE_ID_MATCH_INT_INFO,
                .idVendor       = 0x0eb1,  /* Vendor ID of WIS Technologies */
                .idProduct      = 0x7007,  /* Product ID of GO7007SB chip */
                .bcdDevice_lo   = 0x200,   /* Revision number of XMen */
                .bcdDevice_hi   = 0x200,
                .bInterfaceClass        = 255,
                .bInterfaceSubClass     = 0,
                .bInterfaceProtocol     = 255,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_XMEN,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION,
                .idVendor       = 0x0eb1,  /* Vendor ID of WIS Technologies */
                .idProduct      = 0x7007,  /* Product ID of GO7007SB chip */
                .bcdDevice_lo   = 0x202,   /* Revision number of Matrix II */
                .bcdDevice_hi   = 0x202,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_MATRIX_II,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION,
                .idVendor       = 0x0eb1,  /* Vendor ID of WIS Technologies */
                .idProduct      = 0x7007,  /* Product ID of GO7007SB chip */
                .bcdDevice_lo   = 0x204,   /* Revision number of Matrix */
                .bcdDevice_hi   = 0x204,   /*     Reloaded */
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_MATRIX_RELOAD,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION |
                                        USB_DEVICE_ID_MATCH_INT_INFO,
                .idVendor       = 0x0eb1,  /* Vendor ID of WIS Technologies */
                .idProduct      = 0x7007,  /* Product ID of GO7007SB chip */
                .bcdDevice_lo   = 0x205,   /* Revision number of XMen-II */
                .bcdDevice_hi   = 0x205,
                .bInterfaceClass        = 255,
                .bInterfaceSubClass     = 0,
                .bInterfaceProtocol     = 255,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_XMEN_II,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION,
                .idVendor       = 0x0eb1,  /* Vendor ID of WIS Technologies */
                .idProduct      = 0x7007,  /* Product ID of GO7007SB chip */
                .bcdDevice_lo   = 0x208,   /* Revision number of Star Trek */
                .bcdDevice_hi   = 0x208,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_STAR_TREK,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION |
                                        USB_DEVICE_ID_MATCH_INT_INFO,
                .idVendor       = 0x0eb1,  /* Vendor ID of WIS Technologies */
                .idProduct      = 0x7007,  /* Product ID of GO7007SB chip */
                .bcdDevice_lo   = 0x209,   /* Revision number of XMen-III */
                .bcdDevice_hi   = 0x209,
                .bInterfaceClass        = 255,
                .bInterfaceSubClass     = 0,
                .bInterfaceProtocol     = 255,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_XMEN_III,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION,
                .idVendor       = 0x0eb1,  /* Vendor ID of WIS Technologies */
                .idProduct      = 0x7007,  /* Product ID of GO7007SB chip */
                .bcdDevice_lo   = 0x210,   /* Revision number of Matrix */
                .bcdDevice_hi   = 0x210,   /*     Revolution */
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_MATRIX_REV,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION,
                .idVendor       = 0x093b,  /* Vendor ID of Plextor */
                .idProduct      = 0xa102,  /* Product ID of M402U */
                .bcdDevice_lo   = 0x1,     /* revision number of Blueberry */
                .bcdDevice_hi   = 0x1,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_PX_M402U,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION,
                .idVendor       = 0x093b,  /* Vendor ID of Plextor */
                .idProduct      = 0xa104,  /* Product ID of TV402U */
                .bcdDevice_lo   = 0x1,
                .bcdDevice_hi   = 0x1,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_PX_TV402U,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION,
                .idVendor       = 0x10fd,  /* Vendor ID of Anubis Electronics */
                .idProduct      = 0xde00,  /* Product ID of Lifeview LR192 */
                .bcdDevice_lo   = 0x1,
                .bcdDevice_hi   = 0x1,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_LIFEVIEW_LR192,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION,
                .idVendor       = 0x1943,  /* Vendor ID Sensoray */
                .idProduct      = 0x2250,  /* Product ID of 2250/2251 */
                .bcdDevice_lo   = 0x1,
                .bcdDevice_hi   = 0x1,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_SENSORAY_2250,
        },
        {
                .match_flags    = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION,
                .idVendor       = 0x06e1,  /* Vendor ID of ADS Technologies */
                .idProduct      = 0x0709,  /* Product ID of DVD Xpress DX2 */
                .bcdDevice_lo   = 0x204,
                .bcdDevice_hi   = 0x204,
                .driver_info    = (kernel_ulong_t)GO7007_BOARDID_ADS_USBAV_709,
        },
        { }                                     /* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, go7007_usb_id_table);

/********************* Driver for EZ-USB HPI interface *********************/

static int go7007_usb_vendor_request(struct go7007 *go, int request,
                int value, int index, void *transfer_buffer, int length, int in)
{
        struct go7007_usb *usb = go->hpi_context;
        int timeout = 5000;

        if (in) {
                return usb_control_msg(usb->usbdev,
                                usb_rcvctrlpipe(usb->usbdev, 0), request,
                                USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
                                value, index, transfer_buffer, length, timeout);
        } else {
                return usb_control_msg(usb->usbdev,
                                usb_sndctrlpipe(usb->usbdev, 0), request,
                                USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                                value, index, transfer_buffer, length, timeout);
        }
}

static int go7007_usb_interface_reset(struct go7007 *go)
{
        struct go7007_usb *usb = go->hpi_context;
        u16 intr_val, intr_data;

        if (go->status == STATUS_SHUTDOWN)
                return -1;
        /* Reset encoder */
        if (go7007_write_interrupt(go, 0x0001, 0x0001) < 0)
                return -1;
        msleep(100);

        if (usb->board->flags & GO7007_USB_EZUSB) {
                /* Reset buffer in EZ-USB */
                pr_debug("resetting EZ-USB buffers\n");
                if (go7007_usb_vendor_request(go, 0x10, 0, 0, NULL, 0, 0) < 0 ||
                    go7007_usb_vendor_request(go, 0x10, 0, 0, NULL, 0, 0) < 0)
                        return -1;

                /* Reset encoder again */
                if (go7007_write_interrupt(go, 0x0001, 0x0001) < 0)
                        return -1;
                msleep(100);
        }

        /* Wait for an interrupt to indicate successful hardware reset */
        if (go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
                        (intr_val & ~0x1) != 0x55aa) {
                dev_err(go->dev, "unable to reset the USB interface\n");
                return -1;
        }
        return 0;
}

static int go7007_usb_ezusb_write_interrupt(struct go7007 *go,
                                                int addr, int data)
{
        struct go7007_usb *usb = go->hpi_context;
        int i, r;
        u16 status_reg = 0;
        int timeout = 500;

        pr_debug("WriteInterrupt: %04x %04x\n", addr, data);

        for (i = 0; i < 100; ++i) {
                r = usb_control_msg(usb->usbdev,
                                usb_rcvctrlpipe(usb->usbdev, 0), 0x14,
                                USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
                                0, HPI_STATUS_ADDR, go->usb_buf,
                                sizeof(status_reg), timeout);
                if (r < 0)
                        break;
                status_reg = le16_to_cpu(*((__le16 *)go->usb_buf));
                if (!(status_reg & 0x0010))
                        break;
                msleep(10);
        }
        if (r < 0)
                goto write_int_error;
        if (i == 100) {
                dev_err(go->dev, "device is hung, status reg = 0x%04x\n", status_reg);
                return -1;
        }
        r = usb_control_msg(usb->usbdev, usb_sndctrlpipe(usb->usbdev, 0), 0x12,
                        USB_TYPE_VENDOR | USB_RECIP_DEVICE, data,
                        INT_PARAM_ADDR, NULL, 0, timeout);
        if (r < 0)
                goto write_int_error;
        r = usb_control_msg(usb->usbdev, usb_sndctrlpipe(usb->usbdev, 0),
                        0x12, USB_TYPE_VENDOR | USB_RECIP_DEVICE, addr,
                        INT_INDEX_ADDR, NULL, 0, timeout);
        if (r < 0)
                goto write_int_error;
        return 0;

write_int_error:
        dev_err(go->dev, "error in WriteInterrupt: %d\n", r);
        return r;
}

static int go7007_usb_onboard_write_interrupt(struct go7007 *go,
                                                int addr, int data)
{
        struct go7007_usb *usb = go->hpi_context;
        int r;
        int timeout = 500;

        pr_debug("WriteInterrupt: %04x %04x\n", addr, data);

        go->usb_buf[0] = data & 0xff;
        go->usb_buf[1] = data >> 8;
        go->usb_buf[2] = addr & 0xff;
        go->usb_buf[3] = addr >> 8;
        go->usb_buf[4] = go->usb_buf[5] = go->usb_buf[6] = go->usb_buf[7] = 0;
        r = usb_control_msg(usb->usbdev, usb_sndctrlpipe(usb->usbdev, 2), 0x00,
                        USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0x55aa,
                        0xf0f0, go->usb_buf, 8, timeout);
        if (r < 0) {
                dev_err(go->dev, "error in WriteInterrupt: %d\n", r);
                return r;
        }
        return 0;
}

static void go7007_usb_readinterrupt_complete(struct urb *urb)
{
        struct go7007 *go = (struct go7007 *)urb->context;
        __le16 *regs = (__le16 *)urb->transfer_buffer;
        int status = urb->status;

        if (status) {
                if (status != -ESHUTDOWN &&
                                go->status != STATUS_SHUTDOWN) {
                        dev_err(go->dev, "error in read interrupt: %d\n", urb->status);
                } else {
                        wake_up(&go->interrupt_waitq);
                        return;
                }
        } else if (urb->actual_length != urb->transfer_buffer_length) {
                dev_err(go->dev, "short read in interrupt pipe!\n");
        } else {
                go->interrupt_available = 1;
                go->interrupt_data = __le16_to_cpu(regs[0]);
                go->interrupt_value = __le16_to_cpu(regs[1]);
                pr_debug("ReadInterrupt: %04x %04x\n",
                                go->interrupt_value, go->interrupt_data);
        }

        wake_up(&go->interrupt_waitq);
}

static int go7007_usb_read_interrupt(struct go7007 *go)
{
        struct go7007_usb *usb = go->hpi_context;
        int r;

        r = usb_submit_urb(usb->intr_urb, GFP_KERNEL);
        if (r < 0) {
                dev_err(go->dev, "unable to submit interrupt urb: %d\n", r);
                return r;
        }
        return 0;
}

static void go7007_usb_read_video_pipe_complete(struct urb *urb)
{
        struct go7007 *go = (struct go7007 *)urb->context;
        int r, status = urb->status;

        if (!vb2_is_streaming(&go->vidq)) {
                wake_up_interruptible(&go->frame_waitq);
                return;
        }
        if (status) {
                dev_err(go->dev, "error in video pipe: %d\n", status);
                return;
        }
        if (urb->actual_length != urb->transfer_buffer_length) {
                dev_err(go->dev, "short read in video pipe!\n");
                return;
        }
        go7007_parse_video_stream(go, urb->transfer_buffer, urb->actual_length);
        r = usb_submit_urb(urb, GFP_ATOMIC);
        if (r < 0)
                dev_err(go->dev, "error in video pipe: %d\n", r);
}

static void go7007_usb_read_audio_pipe_complete(struct urb *urb)
{
        struct go7007 *go = (struct go7007 *)urb->context;
        int r, status = urb->status;

        if (!vb2_is_streaming(&go->vidq))
                return;
        if (status) {
                dev_err(go->dev, "error in audio pipe: %d\n",
                        status);
                return;
        }
        if (urb->actual_length != urb->transfer_buffer_length) {
                dev_err(go->dev, "short read in audio pipe!\n");
                return;
        }
        if (go->audio_deliver != NULL)
                go->audio_deliver(go, urb->transfer_buffer, urb->actual_length);
        r = usb_submit_urb(urb, GFP_ATOMIC);
        if (r < 0)
                dev_err(go->dev, "error in audio pipe: %d\n", r);
}

static int go7007_usb_stream_start(struct go7007 *go)
{
        struct go7007_usb *usb = go->hpi_context;
        int i, r;

        for (i = 0; i < 8; ++i) {
                r = usb_submit_urb(usb->video_urbs[i], GFP_KERNEL);
                if (r < 0) {
                        dev_err(go->dev, "error submitting video urb %d: %d\n", i, r);
                        goto video_submit_failed;
                }
        }
        if (!go->audio_enabled)
                return 0;

        for (i = 0; i < 8; ++i) {
                r = usb_submit_urb(usb->audio_urbs[i], GFP_KERNEL);
                if (r < 0) {
                        dev_err(go->dev, "error submitting audio urb %d: %d\n", i, r);
                        goto audio_submit_failed;
                }
        }
        return 0;

audio_submit_failed:
        for (i = 0; i < 7; ++i)
                usb_kill_urb(usb->audio_urbs[i]);
video_submit_failed:
        for (i = 0; i < 8; ++i)
                usb_kill_urb(usb->video_urbs[i]);
        return -1;
}

static int go7007_usb_stream_stop(struct go7007 *go)
{
        struct go7007_usb *usb = go->hpi_context;
        int i;

        if (go->status == STATUS_SHUTDOWN)
                return 0;
        for (i = 0; i < 8; ++i)
                usb_kill_urb(usb->video_urbs[i]);
        if (go->audio_enabled)
                for (i = 0; i < 8; ++i)
                        usb_kill_urb(usb->audio_urbs[i]);
        return 0;
}

static int go7007_usb_send_firmware(struct go7007 *go, u8 *data, int len)
{
        struct go7007_usb *usb = go->hpi_context;
        int transferred, pipe;
        int timeout = 500;

        pr_debug("DownloadBuffer sending %d bytes\n", len);

        if (usb->board->flags & GO7007_USB_EZUSB)
                pipe = usb_sndbulkpipe(usb->usbdev, 2);
        else
                pipe = usb_sndbulkpipe(usb->usbdev, 3);

        return usb_bulk_msg(usb->usbdev, pipe, data, len,
                                        &transferred, timeout);
}

static void go7007_usb_release(struct go7007 *go)
{
        struct go7007_usb *usb = go->hpi_context;
        struct urb *vurb, *aurb;
        int i;

        if (usb->intr_urb) {
                usb_kill_urb(usb->intr_urb);
                kfree(usb->intr_urb->transfer_buffer);
                usb_free_urb(usb->intr_urb);
        }

        /* Free USB-related structs */
        for (i = 0; i < 8; ++i) {
                vurb = usb->video_urbs[i];
                if (vurb) {
                        usb_kill_urb(vurb);
                        kfree(vurb->transfer_buffer);
                        usb_free_urb(vurb);
                }
                aurb = usb->audio_urbs[i];
                if (aurb) {
                        usb_kill_urb(aurb);
                        kfree(aurb->transfer_buffer);
                        usb_free_urb(aurb);
                }
        }

        kfree(go->hpi_context);
}

static const struct go7007_hpi_ops go7007_usb_ezusb_hpi_ops = {
        .interface_reset        = go7007_usb_interface_reset,
        .write_interrupt        = go7007_usb_ezusb_write_interrupt,
        .read_interrupt         = go7007_usb_read_interrupt,
        .stream_start           = go7007_usb_stream_start,
        .stream_stop            = go7007_usb_stream_stop,
        .send_firmware          = go7007_usb_send_firmware,
        .release                = go7007_usb_release,
};

static const struct go7007_hpi_ops go7007_usb_onboard_hpi_ops = {
        .interface_reset        = go7007_usb_interface_reset,
        .write_interrupt        = go7007_usb_onboard_write_interrupt,
        .read_interrupt         = go7007_usb_read_interrupt,
        .stream_start           = go7007_usb_stream_start,
        .stream_stop            = go7007_usb_stream_stop,
        .send_firmware          = go7007_usb_send_firmware,
        .release                = go7007_usb_release,
};

/********************* Driver for EZ-USB I2C adapter *********************/

static int go7007_usb_i2c_master_xfer(struct i2c_adapter *adapter,
                                        struct i2c_msg msgs[], int num)
{
        struct go7007 *go = i2c_get_adapdata(adapter);
        struct go7007_usb *usb = go->hpi_context;
        u8 *buf = go->usb_buf;
        int buf_len, i;
        int ret = -EIO;

        if (go->status == STATUS_SHUTDOWN)
                return -ENODEV;

        mutex_lock(&usb->i2c_lock);

        for (i = 0; i < num; ++i) {
                /* The hardware command is "write some bytes then read some
                 * bytes", so we try to coalesce a write followed by a read
                 * into a single USB transaction */
                if (i + 1 < num && msgs[i].addr == msgs[i + 1].addr &&
                                !(msgs[i].flags & I2C_M_RD) &&
                                (msgs[i + 1].flags & I2C_M_RD)) {
#ifdef GO7007_I2C_DEBUG
                        pr_debug("i2c write/read %d/%d bytes on %02x\n",
                                msgs[i].len, msgs[i + 1].len, msgs[i].addr);
#endif
                        buf[0] = 0x01;
                        buf[1] = msgs[i].len + 1;
                        buf[2] = msgs[i].addr << 1;
                        memcpy(&buf[3], msgs[i].buf, msgs[i].len);
                        buf_len = msgs[i].len + 3;
                        buf[buf_len++] = msgs[++i].len;
                } else if (msgs[i].flags & I2C_M_RD) {
#ifdef GO7007_I2C_DEBUG
                        pr_debug("i2c read %d bytes on %02x\n",
                                        msgs[i].len, msgs[i].addr);
#endif
                        buf[0] = 0x01;
                        buf[1] = 1;
                        buf[2] = msgs[i].addr << 1;
                        buf[3] = msgs[i].len;
                        buf_len = 4;
                } else {
#ifdef GO7007_I2C_DEBUG
                        pr_debug("i2c write %d bytes on %02x\n",
                                        msgs[i].len, msgs[i].addr);
#endif
                        buf[0] = 0x00;
                        buf[1] = msgs[i].len + 1;
                        buf[2] = msgs[i].addr << 1;
                        memcpy(&buf[3], msgs[i].buf, msgs[i].len);
                        buf_len = msgs[i].len + 3;
                        buf[buf_len++] = 0;
                }
                if (go7007_usb_vendor_request(go, 0x24, 0, 0,
                                                buf, buf_len, 0) < 0)
                        goto i2c_done;
                if (msgs[i].flags & I2C_M_RD) {
                        memset(buf, 0, msgs[i].len + 1);
                        if (go7007_usb_vendor_request(go, 0x25, 0, 0, buf,
                                                msgs[i].len + 1, 1) < 0)
                                goto i2c_done;
                        memcpy(msgs[i].buf, buf + 1, msgs[i].len);
                }
        }
        ret = num;

i2c_done:
        mutex_unlock(&usb->i2c_lock);
        return ret;
}

static u32 go7007_usb_functionality(struct i2c_adapter *adapter)
{
        /* No errors are reported by the hardware, so we don't bother
         * supporting quick writes to avoid confusing probing */
        return (I2C_FUNC_SMBUS_EMUL) & ~I2C_FUNC_SMBUS_QUICK;
}

static const struct i2c_algorithm go7007_usb_algo = {
        .master_xfer    = go7007_usb_i2c_master_xfer,
        .functionality  = go7007_usb_functionality,
};

static struct i2c_adapter go7007_usb_adap_templ = {
        .owner                  = THIS_MODULE,
        .name                   = "WIS GO7007SB EZ-USB",
        .algo                   = &go7007_usb_algo,
};

/********************* USB add/remove functions *********************/

static int go7007_usb_probe(struct usb_interface *intf,
                const struct usb_device_id *id)
{
        struct go7007 *go;
        struct go7007_usb *usb;
        const struct go7007_usb_board *board;
        struct usb_device *usbdev = interface_to_usbdev(intf);
        struct usb_host_endpoint *ep;
        unsigned num_i2c_devs;
        char *name;
        int video_pipe, i, v_urb_len;

        pr_debug("probing new GO7007 USB board\n");

        switch (id->driver_info) {
        case GO7007_BOARDID_MATRIX_II:
                name = "WIS Matrix II or compatible";
                board = &board_matrix_ii;
                break;
        case GO7007_BOARDID_MATRIX_RELOAD:
                name = "WIS Matrix Reloaded or compatible";
                board = &board_matrix_reload;
                break;
        case GO7007_BOARDID_MATRIX_REV:
                name = "WIS Matrix Revolution or compatible";
                board = &board_matrix_revolution;
                break;
        case GO7007_BOARDID_STAR_TREK:
                name = "WIS Star Trek or compatible";
                board = &board_star_trek;
                break;
        case GO7007_BOARDID_XMEN:
                name = "WIS XMen or compatible";
                board = &board_xmen;
                break;
        case GO7007_BOARDID_XMEN_II:
                name = "WIS XMen II or compatible";
                board = &board_xmen;
                break;
        case GO7007_BOARDID_XMEN_III:
                name = "WIS XMen III or compatible";
                board = &board_xmen;
                break;
        case GO7007_BOARDID_PX_M402U:
                name = "Plextor PX-M402U";
                board = &board_matrix_ii;
                break;
        case GO7007_BOARDID_PX_TV402U:
                name = "Plextor PX-TV402U (unknown tuner)";
                board = &board_px_tv402u;
                break;
        case GO7007_BOARDID_LIFEVIEW_LR192:
                dev_err(&intf->dev, "The Lifeview TV Walker Ultra is not supported. Sorry!\n");
                return -ENODEV;
#if 0
                name = "Lifeview TV Walker Ultra";
                board = &board_lifeview_lr192;
#endif
                break;
        case GO7007_BOARDID_SENSORAY_2250:
                dev_info(&intf->dev, "Sensoray 2250 found\n");
                name = "Sensoray 2250/2251";
                board = &board_sensoray_2250;
                break;
        case GO7007_BOARDID_ADS_USBAV_709:
                name = "ADS Tech DVD Xpress DX2";
                board = &board_ads_usbav_709;
                break;
        default:
                dev_err(&intf->dev, "unknown board ID %d!\n",
                                (unsigned int)id->driver_info);
                return -ENODEV;
        }

        go = go7007_alloc(&board->main_info, &intf->dev);
        if (go == NULL)
                return -ENOMEM;

        usb = kzalloc_obj(struct go7007_usb);
        if (usb == NULL) {
                kfree(go);
                return -ENOMEM;
        }

        usb->board = board;
        usb->usbdev = usbdev;
        usb_make_path(usbdev, go->bus_info, sizeof(go->bus_info));
        go->board_id = id->driver_info;
        strscpy(go->name, name, sizeof(go->name));
        if (board->flags & GO7007_USB_EZUSB)
                go->hpi_ops = &go7007_usb_ezusb_hpi_ops;
        else
                go->hpi_ops = &go7007_usb_onboard_hpi_ops;
        go->hpi_context = usb;

        ep = usb->usbdev->ep_in[4];
        if (!ep)
                goto allocfail;

        /* Allocate the URB and buffer for receiving incoming interrupts */
        usb->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
        if (usb->intr_urb == NULL)
                goto allocfail;
        usb->intr_urb->transfer_buffer = kmalloc_array(2, sizeof(u16),
                                                       GFP_KERNEL);
        if (usb->intr_urb->transfer_buffer == NULL)
                goto allocfail;

        if (usb_endpoint_type(&ep->desc) == USB_ENDPOINT_XFER_BULK)
                usb_fill_bulk_urb(usb->intr_urb, usb->usbdev,
                        usb_rcvbulkpipe(usb->usbdev, 4),
                        usb->intr_urb->transfer_buffer, 2*sizeof(u16),
                        go7007_usb_readinterrupt_complete, go);
        else
                usb_fill_int_urb(usb->intr_urb, usb->usbdev,
                        usb_rcvintpipe(usb->usbdev, 4),
                        usb->intr_urb->transfer_buffer, 2*sizeof(u16),
                        go7007_usb_readinterrupt_complete, go, 8);
        usb_set_intfdata(intf, &go->v4l2_dev);

        /* Boot the GO7007 */
        if (go7007_boot_encoder(go, go->board_info->flags &
                                        GO7007_BOARD_USE_ONBOARD_I2C) < 0)
                goto allocfail;

        /* Register the EZ-USB I2C adapter, if we're using it */
        if (board->flags & GO7007_USB_EZUSB_I2C) {
                memcpy(&go->i2c_adapter, &go7007_usb_adap_templ,
                                sizeof(go7007_usb_adap_templ));
                mutex_init(&usb->i2c_lock);
                go->i2c_adapter.dev.parent = go->dev;
                i2c_set_adapdata(&go->i2c_adapter, go);
                if (i2c_add_adapter(&go->i2c_adapter) < 0) {
                        dev_err(go->dev, "error: i2c_add_adapter failed\n");
                        goto allocfail;
                }
                go->i2c_adapter_online = 1;
        }

        /* Pelco and Adlink reused the XMen and XMen-III vendor and product
         * IDs for their own incompatible designs.  We can detect XMen boards
         * by probing the sensor, but there is no way to probe the sensors on
         * the Pelco and Adlink designs so we default to the Adlink.  If it
         * is actually a Pelco, the user must set the assume_endura module
         * parameter. */
        if ((go->board_id == GO7007_BOARDID_XMEN ||
                                go->board_id == GO7007_BOARDID_XMEN_III) &&
                        go->i2c_adapter_online) {
                union i2c_smbus_data data;

                /* Check to see if register 0x0A is 0x76 */
                i2c_smbus_xfer(&go->i2c_adapter, 0x21, I2C_CLIENT_SCCB,
                        I2C_SMBUS_READ, 0x0A, I2C_SMBUS_BYTE_DATA, &data);
                if (data.byte != 0x76) {
                        if (assume_endura) {
                                go->board_id = GO7007_BOARDID_ENDURA;
                                usb->board = board = &board_endura;
                                go->board_info = &board->main_info;
                                strscpy(go->name, "Pelco Endura",
                                        sizeof(go->name));
                        } else {
                                u16 channel;

                                /* read channel number from GPIO[1:0] */
                                if (go7007_read_addr(go, 0x3c81, &channel))
                                        goto allocfail;

                                channel &= 0x3;
                                go->board_id = GO7007_BOARDID_ADLINK_MPG24;
                                usb->board = board = &board_adlink_mpg24;
                                go->board_info = &board->main_info;
                                go->channel_number = channel;
                                snprintf(go->name, sizeof(go->name),
                                        "Adlink PCI-MPG24, channel #%d",
                                        channel);
                        }
                        go7007_update_board(go);
                }
        }

        num_i2c_devs = go->board_info->num_i2c_devs;

        /* Probe the tuner model on the TV402U */
        if (go->board_id == GO7007_BOARDID_PX_TV402U) {
                /* Board strapping indicates tuner model */
                if (go7007_usb_vendor_request(go, 0x41, 0, 0, go->usb_buf, 3,
                                        1) < 0) {
                        dev_err(go->dev, "GPIO read failed!\n");
                        goto allocfail;
                }
                switch (go->usb_buf[0] >> 6) {
                case 1:
                        go->tuner_type = TUNER_SONY_BTF_PG472Z;
                        go->std = V4L2_STD_PAL;
                        strscpy(go->name, "Plextor PX-TV402U-EU",
                                sizeof(go->name));
                        break;
                case 2:
                        go->tuner_type = TUNER_SONY_BTF_PK467Z;
                        go->std = V4L2_STD_NTSC_M_JP;
                        num_i2c_devs -= 2;
                        strscpy(go->name, "Plextor PX-TV402U-JP",
                                sizeof(go->name));
                        break;
                case 3:
                        go->tuner_type = TUNER_SONY_BTF_PB463Z;
                        num_i2c_devs -= 2;
                        strscpy(go->name, "Plextor PX-TV402U-NA",
                                sizeof(go->name));
                        break;
                default:
                        pr_debug("unable to detect tuner type!\n");
                        break;
                }
                /* Configure tuner mode selection inputs connected
                 * to the EZ-USB GPIO output pins */
                if (go7007_usb_vendor_request(go, 0x40, 0x7f02, 0,
                                        NULL, 0, 0) < 0) {
                        dev_err(go->dev, "GPIO write failed!\n");
                        goto allocfail;
                }
        }

        /* Print a nasty message if the user attempts to use a USB2.0 device in
         * a USB1.1 port.  There will be silent corruption of the stream. */
        if ((board->flags & GO7007_USB_EZUSB) &&
                        usbdev->speed != USB_SPEED_HIGH)
                dev_err(go->dev, "*** WARNING ***  This device must be connected to a USB 2.0 port! Attempting to capture video through a USB 1.1 port will result in stream corruption, even at low bitrates!\n");

        /* Allocate the URBs and buffers for receiving the video stream */
        if (board->flags & GO7007_USB_EZUSB) {
                if (!usb->usbdev->ep_in[6])
                        goto allocfail;
                v_urb_len = 1024;
                video_pipe = usb_rcvbulkpipe(usb->usbdev, 6);
        } else {
                if (!usb->usbdev->ep_in[1])
                        goto allocfail;
                v_urb_len = 512;
                video_pipe = usb_rcvbulkpipe(usb->usbdev, 1);
        }
        for (i = 0; i < 8; ++i) {
                usb->video_urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
                if (usb->video_urbs[i] == NULL)
                        goto allocfail;
                usb->video_urbs[i]->transfer_buffer =
                                                kmalloc(v_urb_len, GFP_KERNEL);
                if (usb->video_urbs[i]->transfer_buffer == NULL)
                        goto allocfail;
                usb_fill_bulk_urb(usb->video_urbs[i], usb->usbdev, video_pipe,
                                usb->video_urbs[i]->transfer_buffer, v_urb_len,
                                go7007_usb_read_video_pipe_complete, go);
        }

        /* Allocate the URBs and buffers for receiving the audio stream */
        if ((board->flags & GO7007_USB_EZUSB) &&
            (board->main_info.flags & GO7007_BOARD_HAS_AUDIO)) {
                if (!usb->usbdev->ep_in[8])
                        goto allocfail;
                for (i = 0; i < 8; ++i) {
                        usb->audio_urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
                        if (usb->audio_urbs[i] == NULL)
                                goto allocfail;
                        usb->audio_urbs[i]->transfer_buffer = kmalloc(4096,
                                                                GFP_KERNEL);
                        if (usb->audio_urbs[i]->transfer_buffer == NULL)
                                goto allocfail;
                        usb_fill_bulk_urb(usb->audio_urbs[i], usb->usbdev,
                                usb_rcvbulkpipe(usb->usbdev, 8),
                                usb->audio_urbs[i]->transfer_buffer, 4096,
                                go7007_usb_read_audio_pipe_complete, go);
                }
        }

        /* Do any final GO7007 initialization, then register the
         * V4L2 and ALSA interfaces */
        if (go7007_register_encoder(go, num_i2c_devs) < 0)
                goto allocfail;

        go->status = STATUS_ONLINE;
        return 0;

allocfail:
        go7007_usb_release(go);
        kfree(go);
        return -ENOMEM;
}

static void go7007_usb_disconnect(struct usb_interface *intf)
{
        struct go7007 *go = to_go7007(usb_get_intfdata(intf));

        mutex_lock(&go->queue_lock);
        mutex_lock(&go->serialize_lock);

        if (go->audio_enabled)
                go7007_snd_remove(go);

        go->status = STATUS_SHUTDOWN;
        v4l2_device_disconnect(&go->v4l2_dev);
        video_unregister_device(&go->vdev);
        mutex_unlock(&go->serialize_lock);
        mutex_unlock(&go->queue_lock);

        v4l2_device_put(&go->v4l2_dev);
}

static struct usb_driver go7007_usb_driver = {
        .name           = "go7007",
        .probe          = go7007_usb_probe,
        .disconnect     = go7007_usb_disconnect,
        .id_table       = go7007_usb_id_table,
};

module_usb_driver(go7007_usb_driver);
MODULE_DESCRIPTION("WIS GO7007 USB support");
MODULE_LICENSE("GPL v2");