/*
 * SQ930x subdriver
 *
 * Copyright (C) 2010 Jean-François Moine <http://moinejf.free.fr>
 * Copyright (C) 2006 -2008 Gerard Klaver <gerard at gkall dot hobby dot nl>
 * Copyright (C) 2007 Sam Revitch <samr7@cs.washington.edu>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define MODULE_NAME "sq930x"

#include "gspca.h"

MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>\n"
                "Gerard Klaver <gerard at gkall dot hobby dot nl\n"
                "Sam Revitch <samr7@cs.washington.edu>");
MODULE_DESCRIPTION("GSPCA/SQ930x USB Camera Driver");
MODULE_LICENSE("GPL");

/* Structure to hold all of our device specific stuff */
struct sd {
        struct gspca_dev gspca_dev;     /* !! must be the first item */

        struct { /* exposure/gain control cluster */
                struct v4l2_ctrl *exposure;
                struct v4l2_ctrl *gain;
        };

        u8 do_ctrl;
        u8 gpio[2];
        u8 sensor;
        u8 type;
#define Generic 0
#define Creative_live_motion 1
};
enum sensors {
        SENSOR_ICX098BQ,
        SENSOR_LZ24BP,
        SENSOR_MI0360,
        SENSOR_MT9V111,         /* = MI360SOC */
        SENSOR_OV7660,
        SENSOR_OV9630,
};

static struct v4l2_pix_format vga_mode[] = {
        {320, 240, V4L2_PIX_FMT_SRGGB8, V4L2_FIELD_NONE,
                .bytesperline = 320,
                .sizeimage = 320 * 240,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 0},
        {640, 480, V4L2_PIX_FMT_SRGGB8, V4L2_FIELD_NONE,
                .bytesperline = 640,
                .sizeimage = 640 * 480,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 1},
};

/* sq930x registers */
#define SQ930_CTRL_UCBUS_IO     0x0001
#define SQ930_CTRL_I2C_IO       0x0002
#define SQ930_CTRL_GPIO         0x0005
#define SQ930_CTRL_CAP_START    0x0010
#define SQ930_CTRL_CAP_STOP     0x0011
#define SQ930_CTRL_SET_EXPOSURE 0x001d
#define SQ930_CTRL_RESET        0x001e
#define SQ930_CTRL_GET_DEV_INFO 0x001f

/* gpio 1 (8..15) */
#define SQ930_GPIO_DFL_I2C_SDA  0x0001
#define SQ930_GPIO_DFL_I2C_SCL  0x0002
#define SQ930_GPIO_RSTBAR       0x0004
#define SQ930_GPIO_EXTRA1       0x0040
#define SQ930_GPIO_EXTRA2       0x0080
/* gpio 3 (24..31) */
#define SQ930_GPIO_POWER        0x0200
#define SQ930_GPIO_DFL_LED      0x1000

struct ucbus_write_cmd {
        u16     bw_addr;
        u8      bw_data;
};
struct i2c_write_cmd {
        u8      reg;
        u16     val;
};

static const struct ucbus_write_cmd icx098bq_start_0[] = {
        {0x0354, 0x00}, {0x03fa, 0x00}, {0xf800, 0x02}, {0xf801, 0xce},
        {0xf802, 0xc1}, {0xf804, 0x00}, {0xf808, 0x00}, {0xf809, 0x0e},
        {0xf80a, 0x01}, {0xf80b, 0xee}, {0xf807, 0x60}, {0xf80c, 0x02},
        {0xf80d, 0xf0}, {0xf80e, 0x03}, {0xf80f, 0x0a}, {0xf81c, 0x02},
        {0xf81d, 0xf0}, {0xf81e, 0x03}, {0xf81f, 0x0a}, {0xf83a, 0x00},
        {0xf83b, 0x10}, {0xf83c, 0x00}, {0xf83d, 0x4e}, {0xf810, 0x04},
        {0xf811, 0x00}, {0xf812, 0x02}, {0xf813, 0x10}, {0xf803, 0x00},
        {0xf814, 0x01}, {0xf815, 0x18}, {0xf816, 0x00}, {0xf817, 0x48},
        {0xf818, 0x00}, {0xf819, 0x25}, {0xf81a, 0x00}, {0xf81b, 0x3c},
        {0xf82f, 0x03}, {0xf820, 0xff}, {0xf821, 0x0d}, {0xf822, 0xff},
        {0xf823, 0x07}, {0xf824, 0xff}, {0xf825, 0x03}, {0xf826, 0xff},
        {0xf827, 0x06}, {0xf828, 0xff}, {0xf829, 0x03}, {0xf82a, 0xff},
        {0xf82b, 0x0c}, {0xf82c, 0xfd}, {0xf82d, 0x01}, {0xf82e, 0x00},
        {0xf830, 0x00}, {0xf831, 0x47}, {0xf832, 0x00}, {0xf833, 0x00},
        {0xf850, 0x00}, {0xf851, 0x00}, {0xf852, 0x00}, {0xf853, 0x24},
        {0xf854, 0x00}, {0xf855, 0x18}, {0xf856, 0x00}, {0xf857, 0x3c},
        {0xf858, 0x00}, {0xf859, 0x0c}, {0xf85a, 0x00}, {0xf85b, 0x30},
        {0xf85c, 0x00}, {0xf85d, 0x0c}, {0xf85e, 0x00}, {0xf85f, 0x30},
        {0xf860, 0x00}, {0xf861, 0x48}, {0xf862, 0x01}, {0xf863, 0xdc},
        {0xf864, 0xff}, {0xf865, 0x98}, {0xf866, 0xff}, {0xf867, 0xc0},
        {0xf868, 0xff}, {0xf869, 0x70}, {0xf86c, 0xff}, {0xf86d, 0x00},
        {0xf86a, 0xff}, {0xf86b, 0x48}, {0xf86e, 0xff}, {0xf86f, 0x00},
        {0xf870, 0x01}, {0xf871, 0xdb}, {0xf872, 0x01}, {0xf873, 0xfa},
        {0xf874, 0x01}, {0xf875, 0xdb}, {0xf876, 0x01}, {0xf877, 0xfa},
        {0xf878, 0x0f}, {0xf879, 0x0f}, {0xf87a, 0xff}, {0xf87b, 0xff},
        {0xf800, 0x03}
};
static const struct ucbus_write_cmd icx098bq_start_1[] = {
        {0xf5f0, 0x00}, {0xf5f1, 0xcd}, {0xf5f2, 0x80}, {0xf5f3, 0x80},
        {0xf5f4, 0xc0},
        {0xf5f0, 0x49}, {0xf5f1, 0xcd}, {0xf5f2, 0x80}, {0xf5f3, 0x80},
        {0xf5f4, 0xc0},
        {0xf5fa, 0x00}, {0xf5f6, 0x00}, {0xf5f7, 0x00}, {0xf5f8, 0x00},
        {0xf5f9, 0x00}
};

static const struct ucbus_write_cmd icx098bq_start_2[] = {
        {0xf800, 0x02}, {0xf807, 0xff}, {0xf805, 0x82}, {0xf806, 0x00},
        {0xf807, 0x7f}, {0xf800, 0x03},
        {0xf800, 0x02}, {0xf807, 0xff}, {0xf805, 0x40}, {0xf806, 0x00},
        {0xf807, 0x7f}, {0xf800, 0x03},
        {0xf800, 0x02}, {0xf807, 0xff}, {0xf805, 0xcf}, {0xf806, 0xd0},
        {0xf807, 0x7f}, {0xf800, 0x03},
        {0xf800, 0x02}, {0xf807, 0xff}, {0xf805, 0x00}, {0xf806, 0x00},
        {0xf807, 0x7f}, {0xf800, 0x03}
};

static const struct ucbus_write_cmd lz24bp_start_0[] = {
        {0x0354, 0x00}, {0x03fa, 0x00}, {0xf800, 0x02}, {0xf801, 0xbe},
        {0xf802, 0xc6}, {0xf804, 0x00}, {0xf808, 0x00}, {0xf809, 0x06},
        {0xf80a, 0x01}, {0xf80b, 0xfe}, {0xf807, 0x84}, {0xf80c, 0x02},
        {0xf80d, 0xf7}, {0xf80e, 0x03}, {0xf80f, 0x0b}, {0xf81c, 0x00},
        {0xf81d, 0x49}, {0xf81e, 0x03}, {0xf81f, 0x0b}, {0xf83a, 0x00},
        {0xf83b, 0x01}, {0xf83c, 0x00}, {0xf83d, 0x6b}, {0xf810, 0x03},
        {0xf811, 0x10}, {0xf812, 0x02}, {0xf813, 0x6f}, {0xf803, 0x00},
        {0xf814, 0x00}, {0xf815, 0x44}, {0xf816, 0x00}, {0xf817, 0x48},
        {0xf818, 0x00}, {0xf819, 0x25}, {0xf81a, 0x00}, {0xf81b, 0x3c},
        {0xf82f, 0x03}, {0xf820, 0xff}, {0xf821, 0x0d}, {0xf822, 0xff},
        {0xf823, 0x07}, {0xf824, 0xfd}, {0xf825, 0x07}, {0xf826, 0xf0},
        {0xf827, 0x0c}, {0xf828, 0xff}, {0xf829, 0x03}, {0xf82a, 0xff},
        {0xf82b, 0x0c}, {0xf82c, 0xfc}, {0xf82d, 0x01}, {0xf82e, 0x00},
        {0xf830, 0x00}, {0xf831, 0x47}, {0xf832, 0x00}, {0xf833, 0x00},
        {0xf850, 0x00}, {0xf851, 0x00}, {0xf852, 0x00}, {0xf853, 0x24},
        {0xf854, 0x00}, {0xf855, 0x0c}, {0xf856, 0x00}, {0xf857, 0x30},
        {0xf858, 0x00}, {0xf859, 0x18}, {0xf85a, 0x00}, {0xf85b, 0x3c},
        {0xf85c, 0x00}, {0xf85d, 0x18}, {0xf85e, 0x00}, {0xf85f, 0x3c},
        {0xf860, 0xff}, {0xf861, 0x37}, {0xf862, 0xff}, {0xf863, 0x1d},
        {0xf864, 0xff}, {0xf865, 0x98}, {0xf866, 0xff}, {0xf867, 0xc0},
        {0xf868, 0x00}, {0xf869, 0x37}, {0xf86c, 0x02}, {0xf86d, 0x1d},
        {0xf86a, 0x00}, {0xf86b, 0x37}, {0xf86e, 0x02}, {0xf86f, 0x1d},
        {0xf870, 0x01}, {0xf871, 0xc6}, {0xf872, 0x02}, {0xf873, 0x04},
        {0xf874, 0x01}, {0xf875, 0xc6}, {0xf876, 0x02}, {0xf877, 0x04},
        {0xf878, 0x0f}, {0xf879, 0x0f}, {0xf87a, 0xff}, {0xf87b, 0xff},
        {0xf800, 0x03}
};
static const struct ucbus_write_cmd lz24bp_start_1_gen[] = {
        {0xf5f0, 0x00}, {0xf5f1, 0xff}, {0xf5f2, 0x80}, {0xf5f3, 0x80},
        {0xf5f4, 0xb3},
        {0xf5f0, 0x40}, {0xf5f1, 0xff}, {0xf5f2, 0x80}, {0xf5f3, 0x80},
        {0xf5f4, 0xb3},
        {0xf5fa, 0x00}, {0xf5f6, 0x00}, {0xf5f7, 0x00}, {0xf5f8, 0x00},
        {0xf5f9, 0x00}
};

static const struct ucbus_write_cmd lz24bp_start_1_clm[] = {
        {0xf5f0, 0x00}, {0xf5f1, 0xff}, {0xf5f2, 0x88}, {0xf5f3, 0x88},
        {0xf5f4, 0xc0},
        {0xf5f0, 0x40}, {0xf5f1, 0xff}, {0xf5f2, 0x88}, {0xf5f3, 0x88},
        {0xf5f4, 0xc0},
        {0xf5fa, 0x00}, {0xf5f6, 0x00}, {0xf5f7, 0x00}, {0xf5f8, 0x00},
        {0xf5f9, 0x00}
};

static const struct ucbus_write_cmd lz24bp_start_2[] = {
        {0xf800, 0x02}, {0xf807, 0xff}, {0xf805, 0x80}, {0xf806, 0x00},
        {0xf807, 0x7f}, {0xf800, 0x03},
        {0xf800, 0x02}, {0xf807, 0xff}, {0xf805, 0x4e}, {0xf806, 0x00},
        {0xf807, 0x7f}, {0xf800, 0x03},
        {0xf800, 0x02}, {0xf807, 0xff}, {0xf805, 0xc0}, {0xf806, 0x48},
        {0xf807, 0x7f}, {0xf800, 0x03},
        {0xf800, 0x02}, {0xf807, 0xff}, {0xf805, 0x00}, {0xf806, 0x00},
        {0xf807, 0x7f}, {0xf800, 0x03}
};

static const struct ucbus_write_cmd mi0360_start_0[] = {
        {0x0354, 0x00}, {0x03fa, 0x00}, {0xf332, 0xcc}, {0xf333, 0xcc},
        {0xf334, 0xcc}, {0xf335, 0xcc}, {0xf33f, 0x00}
};
static const struct i2c_write_cmd mi0360_init_23[] = {
        {0x30, 0x0040},         /* reserved - def 0x0005 */
        {0x31, 0x0000},         /* reserved - def 0x002a */
        {0x34, 0x0100},         /* reserved - def 0x0100 */
        {0x3d, 0x068f},         /* reserved - def 0x068f */
};
static const struct i2c_write_cmd mi0360_init_24[] = {
        {0x03, 0x01e5},         /* window height */
        {0x04, 0x0285},         /* window width */
};
static const struct i2c_write_cmd mi0360_init_25[] = {
        {0x35, 0x0020},         /* global gain */
        {0x2b, 0x0020},         /* green1 gain */
        {0x2c, 0x002a},         /* blue gain */
        {0x2d, 0x0028},         /* red gain */
        {0x2e, 0x0020},         /* green2 gain */
};
static const struct ucbus_write_cmd mi0360_start_1[] = {
        {0xf5f0, 0x11}, {0xf5f1, 0x99}, {0xf5f2, 0x80}, {0xf5f3, 0x80},
        {0xf5f4, 0xa6},
        {0xf5f0, 0x51}, {0xf5f1, 0x99}, {0xf5f2, 0x80}, {0xf5f3, 0x80},
        {0xf5f4, 0xa6},
        {0xf5fa, 0x00}, {0xf5f6, 0x00}, {0xf5f7, 0x00}, {0xf5f8, 0x00},
        {0xf5f9, 0x00}
};
static const struct i2c_write_cmd mi0360_start_2[] = {
        {0x62, 0x041d},         /* reserved - def 0x0418 */
};
static const struct i2c_write_cmd mi0360_start_3[] = {
        {0x05, 0x007b},         /* horiz blanking */
};
static const struct i2c_write_cmd mi0360_start_4[] = {
        {0x05, 0x03f5},         /* horiz blanking */
};

static const struct i2c_write_cmd mt9v111_init_0[] = {
        {0x01, 0x0001},         /* select IFP/SOC registers */
        {0x06, 0x300c},         /* operating mode control */
        {0x08, 0xcc00},         /* output format control (RGB) */
        {0x01, 0x0004},         /* select sensor core registers */
};
static const struct i2c_write_cmd mt9v111_init_1[] = {
        {0x03, 0x01e5},         /* window height */
        {0x04, 0x0285},         /* window width */
};
static const struct i2c_write_cmd mt9v111_init_2[] = {
        {0x30, 0x7800},
        {0x31, 0x0000},
        {0x07, 0x3002},         /* output control */
        {0x35, 0x0020},         /* global gain */
        {0x2b, 0x0020},         /* green1 gain */
        {0x2c, 0x0020},         /* blue gain */
        {0x2d, 0x0020},         /* red gain */
        {0x2e, 0x0020},         /* green2 gain */
};
static const struct ucbus_write_cmd mt9v111_start_1[] = {
        {0xf5f0, 0x11}, {0xf5f1, 0x96}, {0xf5f2, 0x80}, {0xf5f3, 0x80},
        {0xf5f4, 0xaa},
        {0xf5f0, 0x51}, {0xf5f1, 0x96}, {0xf5f2, 0x80}, {0xf5f3, 0x80},
        {0xf5f4, 0xaa},
        {0xf5fa, 0x00}, {0xf5f6, 0x0a}, {0xf5f7, 0x0a}, {0xf5f8, 0x0a},
        {0xf5f9, 0x0a}
};
static const struct i2c_write_cmd mt9v111_init_3[] = {
        {0x62, 0x0405},
};
static const struct i2c_write_cmd mt9v111_init_4[] = {
/*      {0x05, 0x00ce}, */
        {0x05, 0x005d},         /* horizontal blanking */
};

static const struct ucbus_write_cmd ov7660_start_0[] = {
        {0x0354, 0x00}, {0x03fa, 0x00}, {0xf332, 0x00}, {0xf333, 0xc0},
        {0xf334, 0x39}, {0xf335, 0xe7}, {0xf33f, 0x03}
};

static const struct ucbus_write_cmd ov9630_start_0[] = {
        {0x0354, 0x00}, {0x03fa, 0x00}, {0xf332, 0x00}, {0xf333, 0x00},
        {0xf334, 0x3e}, {0xf335, 0xf8}, {0xf33f, 0x03}
};

/* start parameters indexed by [sensor][mode] */
static const struct cap_s {
        u8      cc_sizeid;
        u8      cc_bytes[32];
} capconfig[4][2] = {
        [SENSOR_ICX098BQ] = {
                {2,                             /* Bayer 320x240 */
                  {0x05, 0x1f, 0x20, 0x0e, 0x00, 0x9f, 0x02, 0xee,
                   0x01, 0x01, 0x00, 0x08, 0x18, 0x12, 0x78, 0xc8,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },
                {4,                             /* Bayer 640x480 */
                  {0x01, 0x1f, 0x20, 0x0e, 0x00, 0x9f, 0x02, 0xee,
                   0x01, 0x02, 0x00, 0x08, 0x18, 0x12, 0x78, 0xc8,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },
        },
        [SENSOR_LZ24BP] = {
                {2,                             /* Bayer 320x240 */
                  {0x05, 0x22, 0x20, 0x0e, 0x00, 0xa2, 0x02, 0xee,
                   0x01, 0x01, 0x00, 0x08, 0x18, 0x12, 0x78, 0xc8,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },
                {4,                             /* Bayer 640x480 */
                  {0x01, 0x22, 0x20, 0x0e, 0x00, 0xa2, 0x02, 0xee,
                   0x01, 0x02, 0x00, 0x08, 0x18, 0x12, 0x78, 0xc8,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },
        },
        [SENSOR_MI0360] = {
                {2,                             /* Bayer 320x240 */
                  {0x05, 0x02, 0x20, 0x01, 0x20, 0x82, 0x02, 0xe1,
                   0x01, 0x01, 0x00, 0x08, 0x18, 0x12, 0x78, 0xc8,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },
                {4,                             /* Bayer 640x480 */
                  {0x01, 0x02, 0x20, 0x01, 0x20, 0x82, 0x02, 0xe1,
                   0x01, 0x02, 0x00, 0x08, 0x18, 0x12, 0x78, 0xc8,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },
        },
        [SENSOR_MT9V111] = {
                {2,                             /* Bayer 320x240 */
                  {0x05, 0x02, 0x20, 0x01, 0x20, 0x82, 0x02, 0xe1,
                   0x01, 0x01, 0x00, 0x08, 0x18, 0x12, 0x78, 0xc8,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },
                {4,                             /* Bayer 640x480 */
                  {0x01, 0x02, 0x20, 0x01, 0x20, 0x82, 0x02, 0xe1,
                   0x01, 0x02, 0x00, 0x08, 0x18, 0x12, 0x78, 0xc8,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} },
        },
};

struct sensor_s {
        const char *name;
        u8 i2c_addr;
        u8 i2c_dum;
        u8 gpio[5];
        u8 cmd_len;
        const struct ucbus_write_cmd *cmd;
};

static const struct sensor_s sensor_tb[] = {
        [SENSOR_ICX098BQ] = {
                "icx098bp",
                0x00, 0x00,
                {0,
                 SQ930_GPIO_DFL_I2C_SDA | SQ930_GPIO_DFL_I2C_SCL,
                 SQ930_GPIO_DFL_I2C_SDA,
                 0,
                 SQ930_GPIO_RSTBAR
                },
                8, icx098bq_start_0
            },
        [SENSOR_LZ24BP] = {
                "lz24bp",
                0x00, 0x00,
                {0,
                 SQ930_GPIO_DFL_I2C_SDA | SQ930_GPIO_DFL_I2C_SCL,
                 SQ930_GPIO_DFL_I2C_SDA,
                 0,
                 SQ930_GPIO_RSTBAR
                },
                8, lz24bp_start_0
            },
        [SENSOR_MI0360] = {
                "mi0360",
                0x5d, 0x80,
                {SQ930_GPIO_RSTBAR,
                 SQ930_GPIO_DFL_I2C_SDA | SQ930_GPIO_DFL_I2C_SCL,
                 SQ930_GPIO_DFL_I2C_SDA,
                 0,
                 0
                },
                7, mi0360_start_0
            },
        [SENSOR_MT9V111] = {
                "mt9v111",
                0x5c, 0x7f,
                {SQ930_GPIO_RSTBAR,
                 SQ930_GPIO_DFL_I2C_SDA | SQ930_GPIO_DFL_I2C_SCL,
                 SQ930_GPIO_DFL_I2C_SDA,
                 0,
                 0
                },
                7, mi0360_start_0
            },
        [SENSOR_OV7660] = {
                "ov7660",
                0x21, 0x00,
                {0,
                 SQ930_GPIO_DFL_I2C_SDA | SQ930_GPIO_DFL_I2C_SCL,
                 SQ930_GPIO_DFL_I2C_SDA,
                 0,
                 SQ930_GPIO_RSTBAR
                },
                7, ov7660_start_0
            },
        [SENSOR_OV9630] = {
                "ov9630",
                0x30, 0x00,
                {0,
                 SQ930_GPIO_DFL_I2C_SDA | SQ930_GPIO_DFL_I2C_SCL,
                 SQ930_GPIO_DFL_I2C_SDA,
                 0,
                 SQ930_GPIO_RSTBAR
                },
                7, ov9630_start_0
            },
};

static void reg_r(struct gspca_dev *gspca_dev,
                u16 value, int len)
{
        int ret;

        if (gspca_dev->usb_err < 0)
                return;
        ret = usb_control_msg(gspca_dev->dev,
                        usb_rcvctrlpipe(gspca_dev->dev, 0),
                        0x0c,
                        USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                        value, 0, gspca_dev->usb_buf, len,
                        500);
        if (ret < 0) {
                pr_err("reg_r %04x failed %d\n", value, ret);
                gspca_dev->usb_err = ret;
        }
}

static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
{
        int ret;

        if (gspca_dev->usb_err < 0)
                return;
        gspca_dbg(gspca_dev, D_USBO, "reg_w v: %04x i: %04x\n", value, index);
        ret = usb_control_msg(gspca_dev->dev,
                        usb_sndctrlpipe(gspca_dev->dev, 0),
                        0x0c,                   /* request */
                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                        value, index, NULL, 0,
                        500);
        msleep(30);
        if (ret < 0) {
                pr_err("reg_w %04x %04x failed %d\n", value, index, ret);
                gspca_dev->usb_err = ret;
        }
}

static void reg_wb(struct gspca_dev *gspca_dev, u16 value, u16 index,
                const u8 *data, int len)
{
        int ret;

        if (gspca_dev->usb_err < 0)
                return;
        gspca_dbg(gspca_dev, D_USBO, "reg_wb v: %04x i: %04x %02x...%02x\n",
                  value, index, *data, data[len - 1]);
        memcpy(gspca_dev->usb_buf, data, len);
        ret = usb_control_msg(gspca_dev->dev,
                        usb_sndctrlpipe(gspca_dev->dev, 0),
                        0x0c,                   /* request */
                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                        value, index, gspca_dev->usb_buf, len,
                        1000);
        msleep(30);
        if (ret < 0) {
                pr_err("reg_wb %04x %04x failed %d\n", value, index, ret);
                gspca_dev->usb_err = ret;
        }
}

static void i2c_write(struct sd *sd,
                        const struct i2c_write_cmd *cmd,
                        int ncmds)
{
        struct gspca_dev *gspca_dev = &sd->gspca_dev;
        const struct sensor_s *sensor;
        u16 val, idx;
        u8 *buf;
        int ret;

        if (gspca_dev->usb_err < 0)
                return;

        sensor = &sensor_tb[sd->sensor];

        val = (sensor->i2c_addr << 8) | SQ930_CTRL_I2C_IO;
        idx = (cmd->val & 0xff00) | cmd->reg;

        buf = gspca_dev->usb_buf;
        *buf++ = sensor->i2c_dum;
        *buf++ = cmd->val;

        while (--ncmds > 0) {
                cmd++;
                *buf++ = cmd->reg;
                *buf++ = cmd->val >> 8;
                *buf++ = sensor->i2c_dum;
                *buf++ = cmd->val;
        }

        gspca_dbg(gspca_dev, D_USBO, "i2c_w v: %04x i: %04x %02x...%02x\n",
                  val, idx, gspca_dev->usb_buf[0], buf[-1]);
        ret = usb_control_msg(gspca_dev->dev,
                        usb_sndctrlpipe(gspca_dev->dev, 0),
                        0x0c,                   /* request */
                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                        val, idx,
                        gspca_dev->usb_buf, buf - gspca_dev->usb_buf,
                        500);
        if (ret < 0) {
                pr_err("i2c_write failed %d\n", ret);
                gspca_dev->usb_err = ret;
        }
}

static void ucbus_write(struct gspca_dev *gspca_dev,
                        const struct ucbus_write_cmd *cmd,
                        int ncmds,
                        int batchsize)
{
        u8 *buf;
        u16 val, idx;
        int len, ret;

        if (gspca_dev->usb_err < 0)
                return;

        if ((batchsize - 1) * 3 > USB_BUF_SZ) {
                gspca_err(gspca_dev, "Bug: usb_buf overflow\n");
                gspca_dev->usb_err = -ENOMEM;
                return;
        }

        for (;;) {
                len = ncmds;
                if (len > batchsize)
                        len = batchsize;
                ncmds -= len;

                val = (cmd->bw_addr << 8) | SQ930_CTRL_UCBUS_IO;
                idx = (cmd->bw_data << 8) | (cmd->bw_addr >> 8);

                buf = gspca_dev->usb_buf;
                while (--len > 0) {
                        cmd++;
                        *buf++ = cmd->bw_addr;
                        *buf++ = cmd->bw_addr >> 8;
                        *buf++ = cmd->bw_data;
                }
                if (buf != gspca_dev->usb_buf)
                        gspca_dbg(gspca_dev, D_USBO, "ucbus v: %04x i: %04x %02x...%02x\n",
                                  val, idx,
                                  gspca_dev->usb_buf[0], buf[-1]);
                else
                        gspca_dbg(gspca_dev, D_USBO, "ucbus v: %04x i: %04x\n",
                                  val, idx);
                ret = usb_control_msg(gspca_dev->dev,
                                usb_sndctrlpipe(gspca_dev->dev, 0),
                                0x0c,                   /* request */
                           USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                                val, idx,
                                gspca_dev->usb_buf, buf - gspca_dev->usb_buf,
                                500);
                if (ret < 0) {
                        pr_err("ucbus_write failed %d\n", ret);
                        gspca_dev->usb_err = ret;
                        return;
                }
                msleep(30);
                if (ncmds <= 0)
                        break;
                cmd++;
        }
}

static void gpio_set(struct sd *sd, u16 val, u16 mask)
{
        struct gspca_dev *gspca_dev = &sd->gspca_dev;

        if (mask & 0x00ff) {
                sd->gpio[0] &= ~mask;
                sd->gpio[0] |= val;
                reg_w(gspca_dev, 0x0100 | SQ930_CTRL_GPIO,
                        ~sd->gpio[0] << 8);
        }
        mask >>= 8;
        val >>= 8;
        if (mask) {
                sd->gpio[1] &= ~mask;
                sd->gpio[1] |= val;
                reg_w(gspca_dev, 0x0300 | SQ930_CTRL_GPIO,
                        ~sd->gpio[1] << 8);
        }
}

static void gpio_init(struct sd *sd,
                        const u8 *gpio)
{
        gpio_set(sd, *gpio++, 0x000f);
        gpio_set(sd, *gpio++, 0x000f);
        gpio_set(sd, *gpio++, 0x000f);
        gpio_set(sd, *gpio++, 0x000f);
        gpio_set(sd, *gpio, 0x000f);
}

static void bridge_init(struct sd *sd)
{
        static const struct ucbus_write_cmd clkfreq_cmd = {
                                0xf031, 0       /* SQ930_CLKFREQ_60MHZ */
        };

        ucbus_write(&sd->gspca_dev, &clkfreq_cmd, 1, 1);

        gpio_set(sd, SQ930_GPIO_POWER, 0xff00);
}

static void cmos_probe(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int i;
        const struct sensor_s *sensor;
        static const u8 probe_order[] = {
/*              SENSOR_LZ24BP,          (tested as ccd) */
                SENSOR_OV9630,
                SENSOR_MI0360,
                SENSOR_OV7660,
                SENSOR_MT9V111,
        };

        for (i = 0; i < ARRAY_SIZE(probe_order); i++) {
                sensor = &sensor_tb[probe_order[i]];
                ucbus_write(&sd->gspca_dev, sensor->cmd, sensor->cmd_len, 8);
                gpio_init(sd, sensor->gpio);
                msleep(100);
                reg_r(gspca_dev, (sensor->i2c_addr << 8) | 0x001c, 1);
                msleep(100);
                if (gspca_dev->usb_buf[0] != 0)
                        break;
        }
        if (i >= ARRAY_SIZE(probe_order)) {
                pr_err("Unknown sensor\n");
                gspca_dev->usb_err = -EINVAL;
                return;
        }
        sd->sensor = probe_order[i];
        switch (sd->sensor) {
        case SENSOR_OV7660:
        case SENSOR_OV9630:
                pr_err("Sensor %s not yet treated\n",
                       sensor_tb[sd->sensor].name);
                gspca_dev->usb_err = -EINVAL;
                break;
        }
}

static void mt9v111_init(struct gspca_dev *gspca_dev)
{
        int i, nwait;
        static const u8 cmd_001b[] = {
                0x00, 0x3b, 0xf6, 0x01, 0x03, 0x02, 0x00, 0x00,
                0x00, 0x00, 0x00
        };
        static const u8 cmd_011b[][7] = {
                {0x10, 0x01, 0x66, 0x08, 0x00, 0x00, 0x00},
                {0x01, 0x00, 0x1a, 0x04, 0x00, 0x00, 0x00},
                {0x20, 0x00, 0x10, 0x04, 0x00, 0x00, 0x00},
                {0x02, 0x01, 0xae, 0x01, 0x00, 0x00, 0x00},
        };

        reg_wb(gspca_dev, 0x001b, 0x0000, cmd_001b, sizeof cmd_001b);
        for (i = 0; i < ARRAY_SIZE(cmd_011b); i++) {
                reg_wb(gspca_dev, 0x001b, 0x0000, cmd_011b[i],
                                ARRAY_SIZE(cmd_011b[0]));
                msleep(400);
                nwait = 20;
                for (;;) {
                        reg_r(gspca_dev, 0x031b, 1);
                        if (gspca_dev->usb_buf[0] == 0
                         || gspca_dev->usb_err != 0)
                                break;
                        if (--nwait < 0) {
                                gspca_dbg(gspca_dev, D_PROBE, "mt9v111_init timeout\n");
                                gspca_dev->usb_err = -ETIME;
                                return;
                        }
                        msleep(50);
                }
        }
}

static void global_init(struct sd *sd, int first_time)
{
        switch (sd->sensor) {
        case SENSOR_ICX098BQ:
                if (first_time)
                        ucbus_write(&sd->gspca_dev,
                                        icx098bq_start_0,
                                        8, 8);
                gpio_init(sd, sensor_tb[sd->sensor].gpio);
                break;
        case SENSOR_LZ24BP:
                if (sd->type != Creative_live_motion)
                        gpio_set(sd, SQ930_GPIO_EXTRA1, 0x00ff);
                else
                        gpio_set(sd, 0, 0x00ff);
                msleep(50);
                if (first_time)
                        ucbus_write(&sd->gspca_dev,
                                        lz24bp_start_0,
                                        8, 8);
                gpio_init(sd, sensor_tb[sd->sensor].gpio);
                break;
        case SENSOR_MI0360:
                if (first_time)
                        ucbus_write(&sd->gspca_dev,
                                        mi0360_start_0,
                                        ARRAY_SIZE(mi0360_start_0),
                                        8);
                gpio_init(sd, sensor_tb[sd->sensor].gpio);
                gpio_set(sd, SQ930_GPIO_EXTRA2, SQ930_GPIO_EXTRA2);
                break;
        default:
/*      case SENSOR_MT9V111: */
                if (first_time)
                        mt9v111_init(&sd->gspca_dev);
                else
                        gpio_init(sd, sensor_tb[sd->sensor].gpio);
                break;
        }
}

static void lz24bp_ppl(struct sd *sd, u16 ppl)
{
        struct ucbus_write_cmd cmds[2] = {
                {0xf810, ppl >> 8},
                {0xf811, ppl}
        };

        ucbus_write(&sd->gspca_dev, cmds, ARRAY_SIZE(cmds), 2);
}

static void setexposure(struct gspca_dev *gspca_dev, s32 expo, s32 gain)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int i, integclks, intstartclk, frameclks, min_frclk;
        const struct sensor_s *sensor;
        u16 cmd;
        u8 buf[15];

        integclks = expo;
        i = 0;
        cmd = SQ930_CTRL_SET_EXPOSURE;

        switch (sd->sensor) {
        case SENSOR_ICX098BQ:                   /* ccd */
        case SENSOR_LZ24BP:
                min_frclk = sd->sensor == SENSOR_ICX098BQ ? 0x210 : 0x26f;
                if (integclks >= min_frclk) {
                        intstartclk = 0;
                        frameclks = integclks;
                } else {
                        intstartclk = min_frclk - integclks;
                        frameclks = min_frclk;
                }
                buf[i++] = intstartclk >> 8;
                buf[i++] = intstartclk;
                buf[i++] = frameclks >> 8;
                buf[i++] = frameclks;
                buf[i++] = gain;
                break;
        default:                                /* cmos */
/*      case SENSOR_MI0360: */
/*      case SENSOR_MT9V111: */
                cmd |= 0x0100;
                sensor = &sensor_tb[sd->sensor];
                buf[i++] = sensor->i2c_addr;    /* i2c_slave_addr */
                buf[i++] = 0x08;        /* 2 * ni2c */
                buf[i++] = 0x09;        /* reg = shutter width */
                buf[i++] = integclks >> 8; /* val H */
                buf[i++] = sensor->i2c_dum;
                buf[i++] = integclks;   /* val L */
                buf[i++] = 0x35;        /* reg = global gain */
                buf[i++] = 0x00;        /* val H */
                buf[i++] = sensor->i2c_dum;
                buf[i++] = 0x80 + gain / 2; /* val L */
                buf[i++] = 0x00;
                buf[i++] = 0x00;
                buf[i++] = 0x00;
                buf[i++] = 0x00;
                buf[i++] = 0x83;
                break;
        }
        reg_wb(gspca_dev, cmd, 0, buf, i);
}

/* This function is called at probe time just before sd_init */
static int sd_config(struct gspca_dev *gspca_dev,
                const struct usb_device_id *id)
{
        struct sd *sd = (struct sd *) gspca_dev;
        struct cam *cam = &gspca_dev->cam;

        sd->sensor = id->driver_info >> 8;
        sd->type = id->driver_info;

        cam->cam_mode = vga_mode;
        cam->nmodes = ARRAY_SIZE(vga_mode);

        cam->bulk = 1;

        return 0;
}

/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;

        sd->gpio[0] = sd->gpio[1] = 0xff;       /* force gpio rewrite */

/*fixme: is this needed for icx098bp and mi0360?
        if (sd->sensor != SENSOR_LZ24BP)
                reg_w(gspca_dev, SQ930_CTRL_RESET, 0x0000);
 */

        reg_r(gspca_dev, SQ930_CTRL_GET_DEV_INFO, 8);
        if (gspca_dev->usb_err < 0)
                return gspca_dev->usb_err;

/* it returns:
 * 03 00 12 93 0b f6 c9 00      live! ultra
 * 03 00 07 93 0b f6 ca 00      live! ultra for notebook
 * 03 00 12 93 0b fe c8 00      Trust WB-3500T
 * 02 00 06 93 0b fe c8 00      Joy-IT 318S
 * 03 00 12 93 0b f6 cf 00      icam tracer - sensor icx098bq
 * 02 00 12 93 0b fe cf 00      ProQ Motion Webcam
 *
 * byte
 * 0: 02 = usb 1.0 (12Mbit) / 03 = usb2.0 (480Mbit)
 * 1: 00
 * 2: 06 / 07 / 12 = mode webcam? firmware??
 * 3: 93 chip = 930b (930b or 930c)
 * 4: 0b
 * 5: f6 = cdd (icx098bq, lz24bp) / fe or de = cmos (i2c) (other sensors)
 * 6: c8 / c9 / ca / cf = mode webcam?, sensor? webcam?
 * 7: 00
 */
        gspca_dbg(gspca_dev, D_PROBE, "info: %*ph\n", 8, gspca_dev->usb_buf);

        bridge_init(sd);

        if (sd->sensor == SENSOR_MI0360) {

                /* no sensor probe for icam tracer */
                if (gspca_dev->usb_buf[5] == 0xf6)      /* if ccd */
                        sd->sensor = SENSOR_ICX098BQ;
                else
                        cmos_probe(gspca_dev);
        }
        if (gspca_dev->usb_err >= 0) {
                gspca_dbg(gspca_dev, D_PROBE, "Sensor %s\n",
                          sensor_tb[sd->sensor].name);
                global_init(sd, 1);
        }
        return gspca_dev->usb_err;
}

/* send the start/stop commands to the webcam */
static void send_start(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        const struct cap_s *cap;
        int mode;

        mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
        cap = &capconfig[sd->sensor][mode];
        reg_wb(gspca_dev, 0x0900 | SQ930_CTRL_CAP_START,
                        0x0a00 | cap->cc_sizeid,
                        cap->cc_bytes, 32);
}

static void send_stop(struct gspca_dev *gspca_dev)
{
        reg_w(gspca_dev, SQ930_CTRL_CAP_STOP, 0);
}

/* function called at start time before URB creation */
static int sd_isoc_init(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;

        gspca_dev->cam.bulk_nurbs = 1;  /* there must be one URB only */
        sd->do_ctrl = 0;
        gspca_dev->cam.bulk_size = gspca_dev->pixfmt.width *
                        gspca_dev->pixfmt.height + 8;
        return 0;
}

/* start the capture */
static int sd_start(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int mode;

        bridge_init(sd);
        global_init(sd, 0);
        msleep(100);

        switch (sd->sensor) {
        case SENSOR_ICX098BQ:
                ucbus_write(gspca_dev, icx098bq_start_0,
                                ARRAY_SIZE(icx098bq_start_0),
                                8);
                ucbus_write(gspca_dev, icx098bq_start_1,
                                ARRAY_SIZE(icx098bq_start_1),
                                5);
                ucbus_write(gspca_dev, icx098bq_start_2,
                                ARRAY_SIZE(icx098bq_start_2),
                                6);
                msleep(50);

                /* 1st start */
                send_start(gspca_dev);
                gpio_set(sd, SQ930_GPIO_EXTRA2 | SQ930_GPIO_RSTBAR, 0x00ff);
                msleep(70);
                reg_w(gspca_dev, SQ930_CTRL_CAP_STOP, 0x0000);
                gpio_set(sd, 0x7f, 0x00ff);

                /* 2nd start */
                send_start(gspca_dev);
                gpio_set(sd, SQ930_GPIO_EXTRA2 | SQ930_GPIO_RSTBAR, 0x00ff);
                goto out;
        case SENSOR_LZ24BP:
                ucbus_write(gspca_dev, lz24bp_start_0,
                                ARRAY_SIZE(lz24bp_start_0),
                                8);
                if (sd->type != Creative_live_motion)
                        ucbus_write(gspca_dev, lz24bp_start_1_gen,
                                        ARRAY_SIZE(lz24bp_start_1_gen),
                                        5);
                else
                        ucbus_write(gspca_dev, lz24bp_start_1_clm,
                                        ARRAY_SIZE(lz24bp_start_1_clm),
                                        5);
                ucbus_write(gspca_dev, lz24bp_start_2,
                                ARRAY_SIZE(lz24bp_start_2),
                                6);
                mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
                lz24bp_ppl(sd, mode == 1 ? 0x0564 : 0x0310);
                msleep(10);
                break;
        case SENSOR_MI0360:
                ucbus_write(gspca_dev, mi0360_start_0,
                                ARRAY_SIZE(mi0360_start_0),
                                8);
                i2c_write(sd, mi0360_init_23,
                                ARRAY_SIZE(mi0360_init_23));
                i2c_write(sd, mi0360_init_24,
                                ARRAY_SIZE(mi0360_init_24));
                i2c_write(sd, mi0360_init_25,
                                ARRAY_SIZE(mi0360_init_25));
                ucbus_write(gspca_dev, mi0360_start_1,
                                ARRAY_SIZE(mi0360_start_1),
                                5);
                i2c_write(sd, mi0360_start_2,
                                ARRAY_SIZE(mi0360_start_2));
                i2c_write(sd, mi0360_start_3,
                                ARRAY_SIZE(mi0360_start_3));

                /* 1st start */
                send_start(gspca_dev);
                msleep(60);
                send_stop(gspca_dev);

                i2c_write(sd,
                        mi0360_start_4, ARRAY_SIZE(mi0360_start_4));
                break;
        default:
/*      case SENSOR_MT9V111: */
                ucbus_write(gspca_dev, mi0360_start_0,
                                ARRAY_SIZE(mi0360_start_0),
                                8);
                i2c_write(sd, mt9v111_init_0,
                                ARRAY_SIZE(mt9v111_init_0));
                i2c_write(sd, mt9v111_init_1,
                                ARRAY_SIZE(mt9v111_init_1));
                i2c_write(sd, mt9v111_init_2,
                                ARRAY_SIZE(mt9v111_init_2));

                ucbus_write(gspca_dev, mt9v111_start_1,
                                ARRAY_SIZE(mt9v111_start_1),
                                5);
                i2c_write(sd, mt9v111_init_3,
                                ARRAY_SIZE(mt9v111_init_3));
                i2c_write(sd, mt9v111_init_4,
                                ARRAY_SIZE(mt9v111_init_4));
                break;
        }

        send_start(gspca_dev);
out:
        msleep(1000);

        if (sd->sensor == SENSOR_MT9V111)
                gpio_set(sd, SQ930_GPIO_DFL_LED, SQ930_GPIO_DFL_LED);

        sd->do_ctrl = 1;        /* set the exposure */

        return gspca_dev->usb_err;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;

        if (sd->sensor == SENSOR_MT9V111)
                gpio_set(sd, 0, SQ930_GPIO_DFL_LED);
        send_stop(gspca_dev);
}

/* function called when the application gets a new frame */
/* It sets the exposure if required and restart the bulk transfer. */
static void sd_dq_callback(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int ret;

        if (!sd->do_ctrl || gspca_dev->cam.bulk_nurbs != 0)
                return;
        sd->do_ctrl = 0;

        setexposure(gspca_dev, v4l2_ctrl_g_ctrl(sd->exposure),
                        v4l2_ctrl_g_ctrl(sd->gain));

        gspca_dev->cam.bulk_nurbs = 1;
        ret = usb_submit_urb(gspca_dev->urb[0], GFP_ATOMIC);
        if (ret < 0)
                pr_err("sd_dq_callback() err %d\n", ret);

        /* wait a little time, otherwise the webcam crashes */
        msleep(100);
}

static void sd_pkt_scan(struct gspca_dev *gspca_dev,
                        u8 *data,               /* isoc packet */
                        int len)                /* iso packet length */
{
        struct sd *sd = (struct sd *) gspca_dev;

        if (sd->do_ctrl)
                gspca_dev->cam.bulk_nurbs = 0;
        gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
        gspca_frame_add(gspca_dev, INTER_PACKET, data, len - 8);
        gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
}

static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct gspca_dev *gspca_dev =
                container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
        struct sd *sd = (struct sd *) gspca_dev;

        gspca_dev->usb_err = 0;

        if (!gspca_dev->streaming)
                return 0;

        switch (ctrl->id) {
        case V4L2_CID_EXPOSURE:
                setexposure(gspca_dev, ctrl->val, sd->gain->val);
                break;
        }
        return gspca_dev->usb_err;
}

static const struct v4l2_ctrl_ops sd_ctrl_ops = {
        .s_ctrl = sd_s_ctrl,
};

static int sd_init_controls(struct gspca_dev *gspca_dev)
{
        struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
        struct sd *sd = (struct sd *) gspca_dev;

        gspca_dev->vdev.ctrl_handler = hdl;
        v4l2_ctrl_handler_init(hdl, 2);
        sd->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_EXPOSURE, 1, 0xfff, 1, 0x356);
        sd->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_GAIN, 1, 255, 1, 0x8d);

        if (hdl->error) {
                pr_err("Could not initialize controls\n");
                return hdl->error;
        }
        v4l2_ctrl_cluster(2, &sd->exposure);
        return 0;
}

/* sub-driver description */
static const struct sd_desc sd_desc = {
        .name   = MODULE_NAME,
        .config = sd_config,
        .init   = sd_init,
        .init_controls = sd_init_controls,
        .isoc_init = sd_isoc_init,
        .start  = sd_start,
        .stopN  = sd_stopN,
        .pkt_scan = sd_pkt_scan,
        .dq_callback = sd_dq_callback,
};

/* Table of supported USB devices */
#define ST(sensor, type) \
        .driver_info = (SENSOR_ ## sensor << 8) \
                        | (type)
static const struct usb_device_id device_table[] = {
        {USB_DEVICE(0x041e, 0x4038), ST(MI0360, 0)},
        {USB_DEVICE(0x041e, 0x403c), ST(LZ24BP, 0)},
        {USB_DEVICE(0x041e, 0x403d), ST(LZ24BP, 0)},
        {USB_DEVICE(0x041e, 0x4041), ST(LZ24BP, Creative_live_motion)},
        {USB_DEVICE(0x2770, 0x930b), ST(MI0360, 0)},
        {USB_DEVICE(0x2770, 0x930c), ST(MI0360, 0)},
        {}
};
MODULE_DEVICE_TABLE(usb, device_table);


/* -- device connect -- */
static int sd_probe(struct usb_interface *intf,
                const struct usb_device_id *id)
{
        return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
                        THIS_MODULE);
}

static struct usb_driver sd_driver = {
        .name       = MODULE_NAME,
        .id_table   = device_table,
        .probe      = sd_probe,
        .disconnect = gspca_disconnect,
#ifdef CONFIG_PM
        .suspend    = gspca_suspend,
        .resume     = gspca_resume,
        .reset_resume = gspca_resume,
#endif
};

module_usb_driver(sd_driver);