ov534.c

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/*
 * ov534-ov7xxx gspca driver
 *
 * Copyright (C) 2008 Antonio Ospite <[email protected]>
 * Copyright (C) 2008 Jim Paris <[email protected]>
 * Copyright (C) 2009 Jean-Francois Moine http://moinejf.free.fr
 *
 * Based on a prototype written by Mark Ferrell <[email protected]>
 * USB protocol reverse engineered by Jim Paris <[email protected]>
 * https://jim.sh/svn/jim/devl/playstation/ps3/eye/test/
 *
 * PS3 Eye camera enhanced by Richard Kaswy http://kaswy.free.fr
 * PS3 Eye camera - brightness, contrast, awb, agc, aec controls
 *                  added by Max Thrun <[email protected]>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define MODULE_NAME "ov534"

#include "gspca.h"

#include <linux/fixp-arith.h>
#include <media/v4l2-ctrls.h>

#define OV534_REG_ADDRESS   0xf1    /* sensor address */
#define OV534_REG_SUBADDR   0xf2
#define OV534_REG_WRITE     0xf3
#define OV534_REG_READ      0xf4
#define OV534_REG_OPERATION 0xf5
#define OV534_REG_STATUS    0xf6

#define OV534_OP_WRITE_3    0x37
#define OV534_OP_WRITE_2    0x33
#define OV534_OP_READ_2     0xf9

#define CTRL_TIMEOUT 500

MODULE_AUTHOR("Antonio Ospite <[email protected]>");
MODULE_DESCRIPTION("GSPCA/OV534 USB Camera Driver");
MODULE_LICENSE("GPL");

/* specific webcam descriptor */
struct sd {
    struct gspca_dev gspca_dev; /* !! must be the first item */

    struct v4l2_ctrl_handler ctrl_handler;
    struct v4l2_ctrl *hue;
    struct v4l2_ctrl *saturation;
    struct v4l2_ctrl *brightness;
    struct v4l2_ctrl *contrast;
    struct { /* gain control cluster */
        struct v4l2_ctrl *autogain;
        struct v4l2_ctrl *gain;
    };
    struct v4l2_ctrl *autowhitebalance;
    struct { /* exposure control cluster */
        struct v4l2_ctrl *autoexposure;
        struct v4l2_ctrl *exposure;
    };
    struct v4l2_ctrl *sharpness;
    struct v4l2_ctrl *hflip;
    struct v4l2_ctrl *vflip;
    struct v4l2_ctrl *plfreq;

    __u32 last_pts;
    u16 last_fid;
    u8 frame_rate;

    u8 sensor;
};
enum sensors {
    SENSOR_OV767x,
    SENSOR_OV772x,
    NSENSORS
};

static int sd_start(struct gspca_dev *gspca_dev);
static void sd_stopN(struct gspca_dev *gspca_dev);


static const struct v4l2_pix_format ov772x_mode[] = {
    {320, 240, V4L2_PIX_FMT_YUYV, V4L2_FIELD_NONE,
     .bytesperline = 320 * 2,
     .sizeimage = 320 * 240 * 2,
     .colorspace = V4L2_COLORSPACE_SRGB,
     .priv = 1},
    {640, 480, V4L2_PIX_FMT_YUYV, V4L2_FIELD_NONE,
     .bytesperline = 640 * 2,
     .sizeimage = 640 * 480 * 2,
     .colorspace = V4L2_COLORSPACE_SRGB,
     .priv = 0},
};
static const struct v4l2_pix_format ov767x_mode[] = {
    {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
        .bytesperline = 320,
        .sizeimage = 320 * 240 * 3 / 8 + 590,
        .colorspace = V4L2_COLORSPACE_JPEG},
    {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
        .bytesperline = 640,
        .sizeimage = 640 * 480 * 3 / 8 + 590,
        .colorspace = V4L2_COLORSPACE_JPEG},
};

static const u8 qvga_rates[] = {125, 100, 75, 60, 50, 40, 30};
static const u8 vga_rates[] = {60, 50, 40, 30, 15};

static const struct framerates ov772x_framerates[] = {
    { /* 320x240 */
        .rates = qvga_rates,
        .nrates = ARRAY_SIZE(qvga_rates),
    },
    { /* 640x480 */
        .rates = vga_rates,
        .nrates = ARRAY_SIZE(vga_rates),
    },
};

struct reg_array {
    const u8 (*val)[2];
    int len;
};

static const u8 bridge_init_767x[][2] = {
/* comments from the ms-win file apollo7670.set */
/* str1 */
    {0xf1, 0x42},
    {0x88, 0xf8},
    {0x89, 0xff},
    {0x76, 0x03},
    {0x92, 0x03},
    {0x95, 0x10},
    {0xe2, 0x00},
    {0xe7, 0x3e},
    {0x8d, 0x1c},
    {0x8e, 0x00},
    {0x8f, 0x00},
    {0x1f, 0x00},
    {0xc3, 0xf9},
    {0x89, 0xff},
    {0x88, 0xf8},
    {0x76, 0x03},
    {0x92, 0x01},
    {0x93, 0x18},
    {0x1c, 0x00},
    {0x1d, 0x48},
    {0x1d, 0x00},
    {0x1d, 0xff},
    {0x1d, 0x02},
    {0x1d, 0x58},
    {0x1d, 0x00},
    {0x1c, 0x0a},
    {0x1d, 0x0a},
    {0x1d, 0x0e},
    {0xc0, 0x50},   /* HSize 640 */
    {0xc1, 0x3c},   /* VSize 480 */
    {0x34, 0x05},   /* enable Audio Suspend mode */
    {0xc2, 0x0c},   /* Input YUV */
    {0xc3, 0xf9},   /* enable PRE */
    {0x34, 0x05},   /* enable Audio Suspend mode */
    {0xe7, 0x2e},   /* this solves failure of "SuspendResumeTest" */
    {0x31, 0xf9},   /* enable 1.8V Suspend */
    {0x35, 0x02},   /* turn on JPEG */
    {0xd9, 0x10},
    {0x25, 0x42},   /* GPIO[8]:Input */
    {0x94, 0x11},   /* If the default setting is loaded when
             * system boots up, this flag is closed here */
};
static const u8 sensor_init_767x[][2] = {
    {0x12, 0x80},
    {0x11, 0x03},
    {0x3a, 0x04},
    {0x12, 0x00},
    {0x17, 0x13},
    {0x18, 0x01},
    {0x32, 0xb6},
    {0x19, 0x02},
    {0x1a, 0x7a},
    {0x03, 0x0a},
    {0x0c, 0x00},
    {0x3e, 0x00},
    {0x70, 0x3a},
    {0x71, 0x35},
    {0x72, 0x11},
    {0x73, 0xf0},
    {0xa2, 0x02},
    {0x7a, 0x2a},   /* set Gamma=1.6 below */
    {0x7b, 0x12},
    {0x7c, 0x1d},
    {0x7d, 0x2d},
    {0x7e, 0x45},
    {0x7f, 0x50},
    {0x80, 0x59},
    {0x81, 0x62},
    {0x82, 0x6b},
    {0x83, 0x73},
    {0x84, 0x7b},
    {0x85, 0x8a},
    {0x86, 0x98},
    {0x87, 0xb2},
    {0x88, 0xca},
    {0x89, 0xe0},
    {0x13, 0xe0},
    {0x00, 0x00},
    {0x10, 0x00},
    {0x0d, 0x40},
    {0x14, 0x38},   /* gain max 16x */
    {0xa5, 0x05},
    {0xab, 0x07},
    {0x24, 0x95},
    {0x25, 0x33},
    {0x26, 0xe3},
    {0x9f, 0x78},
    {0xa0, 0x68},
    {0xa1, 0x03},
    {0xa6, 0xd8},
    {0xa7, 0xd8},
    {0xa8, 0xf0},
    {0xa9, 0x90},
    {0xaa, 0x94},
    {0x13, 0xe5},
    {0x0e, 0x61},
    {0x0f, 0x4b},
    {0x16, 0x02},
    {0x21, 0x02},
    {0x22, 0x91},
    {0x29, 0x07},
    {0x33, 0x0b},
    {0x35, 0x0b},
    {0x37, 0x1d},
    {0x38, 0x71},
    {0x39, 0x2a},
    {0x3c, 0x78},
    {0x4d, 0x40},
    {0x4e, 0x20},
    {0x69, 0x00},
    {0x6b, 0x4a},
    {0x74, 0x10},
    {0x8d, 0x4f},
    {0x8e, 0x00},
    {0x8f, 0x00},
    {0x90, 0x00},
    {0x91, 0x00},
    {0x96, 0x00},
    {0x9a, 0x80},
    {0xb0, 0x84},
    {0xb1, 0x0c},
    {0xb2, 0x0e},
    {0xb3, 0x82},
    {0xb8, 0x0a},
    {0x43, 0x0a},
    {0x44, 0xf0},
    {0x45, 0x34},
    {0x46, 0x58},
    {0x47, 0x28},
    {0x48, 0x3a},
    {0x59, 0x88},
    {0x5a, 0x88},
    {0x5b, 0x44},
    {0x5c, 0x67},
    {0x5d, 0x49},
    {0x5e, 0x0e},
    {0x6c, 0x0a},
    {0x6d, 0x55},
    {0x6e, 0x11},
    {0x6f, 0x9f},
    {0x6a, 0x40},
    {0x01, 0x40},
    {0x02, 0x40},
    {0x13, 0xe7},
    {0x4f, 0x80},
    {0x50, 0x80},
    {0x51, 0x00},
    {0x52, 0x22},
    {0x53, 0x5e},
    {0x54, 0x80},
    {0x58, 0x9e},
    {0x41, 0x08},
    {0x3f, 0x00},
    {0x75, 0x04},
    {0x76, 0xe1},
    {0x4c, 0x00},
    {0x77, 0x01},
    {0x3d, 0xc2},
    {0x4b, 0x09},
    {0xc9, 0x60},
    {0x41, 0x38},   /* jfm: auto sharpness + auto de-noise  */
    {0x56, 0x40},
    {0x34, 0x11},
    {0x3b, 0xc2},
    {0xa4, 0x8a},   /* Night mode trigger point */
    {0x96, 0x00},
    {0x97, 0x30},
    {0x98, 0x20},
    {0x99, 0x20},
    {0x9a, 0x84},
    {0x9b, 0x29},
    {0x9c, 0x03},
    {0x9d, 0x4c},
    {0x9e, 0x3f},
    {0x78, 0x04},
    {0x79, 0x01},
    {0xc8, 0xf0},
    {0x79, 0x0f},
    {0xc8, 0x00},
    {0x79, 0x10},
    {0xc8, 0x7e},
    {0x79, 0x0a},
    {0xc8, 0x80},
    {0x79, 0x0b},
    {0xc8, 0x01},
    {0x79, 0x0c},
    {0xc8, 0x0f},
    {0x79, 0x0d},
    {0xc8, 0x20},
    {0x79, 0x09},
    {0xc8, 0x80},
    {0x79, 0x02},
    {0xc8, 0xc0},
    {0x79, 0x03},
    {0xc8, 0x20},
    {0x79, 0x26},
};
static const u8 bridge_start_vga_767x[][2] = {
/* str59 JPG */
    {0x94, 0xaa},
    {0xf1, 0x42},
    {0xe5, 0x04},
    {0xc0, 0x50},
    {0xc1, 0x3c},
    {0xc2, 0x0c},
    {0x35, 0x02},   /* turn on JPEG */
    {0xd9, 0x10},
    {0xda, 0x00},   /* for higher clock rate(30fps) */
    {0x34, 0x05},   /* enable Audio Suspend mode */
    {0xc3, 0xf9},   /* enable PRE */
    {0x8c, 0x00},   /* CIF VSize LSB[2:0] */
    {0x8d, 0x1c},   /* output YUV */
/*  {0x34, 0x05},    * enable Audio Suspend mode (?) */
    {0x50, 0x00},   /* H/V divider=0 */
    {0x51, 0xa0},   /* input H=640/4 */
    {0x52, 0x3c},   /* input V=480/4 */
    {0x53, 0x00},   /* offset X=0 */
    {0x54, 0x00},   /* offset Y=0 */
    {0x55, 0x00},   /* H/V size[8]=0 */
    {0x57, 0x00},   /* H-size[9]=0 */
    {0x5c, 0x00},   /* output size[9:8]=0 */
    {0x5a, 0xa0},   /* output H=640/4 */
    {0x5b, 0x78},   /* output V=480/4 */
    {0x1c, 0x0a},
    {0x1d, 0x0a},
    {0x94, 0x11},
};
static const u8 sensor_start_vga_767x[][2] = {
    {0x11, 0x01},
    {0x1e, 0x04},
    {0x19, 0x02},
    {0x1a, 0x7a},
};
static const u8 bridge_start_qvga_767x[][2] = {
/* str86 JPG */
    {0x94, 0xaa},
    {0xf1, 0x42},
    {0xe5, 0x04},
    {0xc0, 0x80},
    {0xc1, 0x60},
    {0xc2, 0x0c},
    {0x35, 0x02},   /* turn on JPEG */
    {0xd9, 0x10},
    {0xc0, 0x50},   /* CIF HSize 640 */
    {0xc1, 0x3c},   /* CIF VSize 480 */
    {0x8c, 0x00},   /* CIF VSize LSB[2:0] */
    {0x8d, 0x1c},   /* output YUV */
    {0x34, 0x05},   /* enable Audio Suspend mode */
    {0xc2, 0x4c},   /* output YUV and Enable DCW */
    {0xc3, 0xf9},   /* enable PRE */
    {0x1c, 0x00},   /* indirect addressing */
    {0x1d, 0x48},   /* output YUV422 */
    {0x50, 0x89},   /* H/V divider=/2; plus DCW AVG */
    {0x51, 0xa0},   /* DCW input H=640/4 */
    {0x52, 0x78},   /* DCW input V=480/4 */
    {0x53, 0x00},   /* offset X=0 */
    {0x54, 0x00},   /* offset Y=0 */
    {0x55, 0x00},   /* H/V size[8]=0 */
    {0x57, 0x00},   /* H-size[9]=0 */
    {0x5c, 0x00},   /* DCW output size[9:8]=0 */
    {0x5a, 0x50},   /* DCW output H=320/4 */
    {0x5b, 0x3c},   /* DCW output V=240/4 */
    {0x1c, 0x0a},
    {0x1d, 0x0a},
    {0x94, 0x11},
};
static const u8 sensor_start_qvga_767x[][2] = {
    {0x11, 0x01},
    {0x1e, 0x04},
    {0x19, 0x02},
    {0x1a, 0x7a},
};

static const u8 bridge_init_772x[][2] = {
    { 0xc2, 0x0c },
    { 0x88, 0xf8 },
    { 0xc3, 0x69 },
    { 0x89, 0xff },
    { 0x76, 0x03 },
    { 0x92, 0x01 },
    { 0x93, 0x18 },
    { 0x94, 0x10 },
    { 0x95, 0x10 },
    { 0xe2, 0x00 },
    { 0xe7, 0x3e },

    { 0x96, 0x00 },

    { 0x97, 0x20 },
    { 0x97, 0x20 },
    { 0x97, 0x20 },
    { 0x97, 0x0a },
    { 0x97, 0x3f },
    { 0x97, 0x4a },
    { 0x97, 0x20 },
    { 0x97, 0x15 },
    { 0x97, 0x0b },

    { 0x8e, 0x40 },
    { 0x1f, 0x81 },
    { 0x34, 0x05 },
    { 0xe3, 0x04 },
    { 0x88, 0x00 },
    { 0x89, 0x00 },
    { 0x76, 0x00 },
    { 0xe7, 0x2e },
    { 0x31, 0xf9 },
    { 0x25, 0x42 },
    { 0x21, 0xf0 },

    { 0x1c, 0x00 },
    { 0x1d, 0x40 },
    { 0x1d, 0x02 }, /* payload size 0x0200 * 4 = 2048 bytes */
    { 0x1d, 0x00 }, /* payload size */

    { 0x1d, 0x02 }, /* frame size 0x025800 * 4 = 614400 */
    { 0x1d, 0x58 }, /* frame size */
    { 0x1d, 0x00 }, /* frame size */

    { 0x1c, 0x0a },
    { 0x1d, 0x08 }, /* turn on UVC header */
    { 0x1d, 0x0e }, /* .. */

    { 0x8d, 0x1c },
    { 0x8e, 0x80 },
    { 0xe5, 0x04 },

    { 0xc0, 0x50 },
    { 0xc1, 0x3c },
    { 0xc2, 0x0c },
};
static const u8 sensor_init_772x[][2] = {
    { 0x12, 0x80 },
    { 0x11, 0x01 },
/*fixme: better have a delay?*/
    { 0x11, 0x01 },
    { 0x11, 0x01 },
    { 0x11, 0x01 },
    { 0x11, 0x01 },
    { 0x11, 0x01 },
    { 0x11, 0x01 },
    { 0x11, 0x01 },
    { 0x11, 0x01 },
    { 0x11, 0x01 },
    { 0x11, 0x01 },

    { 0x3d, 0x03 },
    { 0x17, 0x26 },
    { 0x18, 0xa0 },
    { 0x19, 0x07 },
    { 0x1a, 0xf0 },
    { 0x32, 0x00 },
    { 0x29, 0xa0 },
    { 0x2c, 0xf0 },
    { 0x65, 0x20 },
    { 0x11, 0x01 },
    { 0x42, 0x7f },
    { 0x63, 0xaa },     /* AWB - was e0 */
    { 0x64, 0xff },
    { 0x66, 0x00 },
    { 0x13, 0xf0 },     /* com8 */
    { 0x0d, 0x41 },
    { 0x0f, 0xc5 },
    { 0x14, 0x11 },

    { 0x22, 0x7f },
    { 0x23, 0x03 },
    { 0x24, 0x40 },
    { 0x25, 0x30 },
    { 0x26, 0xa1 },
    { 0x2a, 0x00 },
    { 0x2b, 0x00 },
    { 0x6b, 0xaa },
    { 0x13, 0xff },     /* AWB */

    { 0x90, 0x05 },
    { 0x91, 0x01 },
    { 0x92, 0x03 },
    { 0x93, 0x00 },
    { 0x94, 0x60 },
    { 0x95, 0x3c },
    { 0x96, 0x24 },
    { 0x97, 0x1e },
    { 0x98, 0x62 },
    { 0x99, 0x80 },
    { 0x9a, 0x1e },
    { 0x9b, 0x08 },
    { 0x9c, 0x20 },
    { 0x9e, 0x81 },

    { 0xa6, 0x07 },
    { 0x7e, 0x0c },
    { 0x7f, 0x16 },
    { 0x80, 0x2a },
    { 0x81, 0x4e },
    { 0x82, 0x61 },
    { 0x83, 0x6f },
    { 0x84, 0x7b },
    { 0x85, 0x86 },
    { 0x86, 0x8e },
    { 0x87, 0x97 },
    { 0x88, 0xa4 },
    { 0x89, 0xaf },
    { 0x8a, 0xc5 },
    { 0x8b, 0xd7 },
    { 0x8c, 0xe8 },
    { 0x8d, 0x20 },

    { 0x0c, 0x90 },

    { 0x2b, 0x00 },
    { 0x22, 0x7f },
    { 0x23, 0x03 },
    { 0x11, 0x01 },
    { 0x0c, 0xd0 },
    { 0x64, 0xff },
    { 0x0d, 0x41 },

    { 0x14, 0x41 },
    { 0x0e, 0xcd },
    { 0xac, 0xbf },
    { 0x8e, 0x00 },     /* De-noise threshold */
    { 0x0c, 0xd0 }
};
static const u8 bridge_start_vga_772x[][2] = {
    {0x1c, 0x00},
    {0x1d, 0x40},
    {0x1d, 0x02},
    {0x1d, 0x00},
    {0x1d, 0x02},
    {0x1d, 0x58},
    {0x1d, 0x00},
    {0xc0, 0x50},
    {0xc1, 0x3c},
};
static const u8 sensor_start_vga_772x[][2] = {
    {0x12, 0x00},
    {0x17, 0x26},
    {0x18, 0xa0},
    {0x19, 0x07},
    {0x1a, 0xf0},
    {0x29, 0xa0},
    {0x2c, 0xf0},
    {0x65, 0x20},
};
static const u8 bridge_start_qvga_772x[][2] = {
    {0x1c, 0x00},
    {0x1d, 0x40},
    {0x1d, 0x02},
    {0x1d, 0x00},
    {0x1d, 0x01},
    {0x1d, 0x4b},
    {0x1d, 0x00},
    {0xc0, 0x28},
    {0xc1, 0x1e},
};
static const u8 sensor_start_qvga_772x[][2] = {
    {0x12, 0x40},
    {0x17, 0x3f},
    {0x18, 0x50},
    {0x19, 0x03},
    {0x1a, 0x78},
    {0x29, 0x50},
    {0x2c, 0x78},
    {0x65, 0x2f},
};

static void ov534_reg_write(struct gspca_dev *gspca_dev, u16 reg, u8 val)
{
    struct usb_device *udev = gspca_dev->dev;
    int ret;

    if (gspca_dev->usb_err < 0)
        return;

    PDEBUG(D_USBO, "SET 01 0000 %04x %02x", reg, val);
    gspca_dev->usb_buf[0] = val;
    ret = usb_control_msg(udev,
                  usb_sndctrlpipe(udev, 0),
                  0x01,
                  USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                  0x00, reg, gspca_dev->usb_buf, 1, CTRL_TIMEOUT);
    if (ret < 0) {
        pr_err("write failed %d\n", ret);
        gspca_dev->usb_err = ret;
    }
}

static u8 ov534_reg_read(struct gspca_dev *gspca_dev, u16 reg)
{
    struct usb_device *udev = gspca_dev->dev;
    int ret;

    if (gspca_dev->usb_err < 0)
        return 0;
    ret = usb_control_msg(udev,
                  usb_rcvctrlpipe(udev, 0),
                  0x01,
                  USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                  0x00, reg, gspca_dev->usb_buf, 1, CTRL_TIMEOUT);
    PDEBUG(D_USBI, "GET 01 0000 %04x %02x", reg, gspca_dev->usb_buf[0]);
    if (ret < 0) {
        pr_err("read failed %d\n", ret);
        gspca_dev->usb_err = ret;
    }
    return gspca_dev->usb_buf[0];
}

/* Two bits control LED: 0x21 bit 7 and 0x23 bit 7.
 * (direction and output)? */
static void ov534_set_led(struct gspca_dev *gspca_dev, int status)
{
    u8 data;

    PDEBUG(D_CONF, "led status: %d", status);

    data = ov534_reg_read(gspca_dev, 0x21);
    data |= 0x80;
    ov534_reg_write(gspca_dev, 0x21, data);

    data = ov534_reg_read(gspca_dev, 0x23);
    if (status)
        data |= 0x80;
    else
        data &= ~0x80;

    ov534_reg_write(gspca_dev, 0x23, data);

    if (!status) {
        data = ov534_reg_read(gspca_dev, 0x21);
        data &= ~0x80;
        ov534_reg_write(gspca_dev, 0x21, data);
    }
}

static int sccb_check_status(struct gspca_dev *gspca_dev)
{
    u8 data;
    int i;

    for (i = 0; i < 5; i++) {
        msleep(10);
        data = ov534_reg_read(gspca_dev, OV534_REG_STATUS);

        switch (data) {
        case 0x00:
            return 1;
        case 0x04:
            return 0;
        case 0x03:
            break;
        default:
            PDEBUG(D_ERR, "sccb status 0x%02x, attempt %d/5",
                   data, i + 1);
        }
    }
    return 0;
}

static void sccb_reg_write(struct gspca_dev *gspca_dev, u8 reg, u8 val)
{
    PDEBUG(D_USBO, "sccb write: %02x %02x", reg, val);
    ov534_reg_write(gspca_dev, OV534_REG_SUBADDR, reg);
    ov534_reg_write(gspca_dev, OV534_REG_WRITE, val);
    ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_WRITE_3);

    if (!sccb_check_status(gspca_dev)) {
        pr_err("sccb_reg_write failed\n");
        gspca_dev->usb_err = -EIO;
    }
}

static u8 sccb_reg_read(struct gspca_dev *gspca_dev, u16 reg)
{
    ov534_reg_write(gspca_dev, OV534_REG_SUBADDR, reg);
    ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_WRITE_2);
    if (!sccb_check_status(gspca_dev))
        pr_err("sccb_reg_read failed 1\n");

    ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_READ_2);
    if (!sccb_check_status(gspca_dev))
        pr_err("sccb_reg_read failed 2\n");

    return ov534_reg_read(gspca_dev, OV534_REG_READ);
}

/* output a bridge sequence (reg - val) */
static void reg_w_array(struct gspca_dev *gspca_dev,
            const u8 (*data)[2], int len)
{
    while (--len >= 0) {
        ov534_reg_write(gspca_dev, (*data)[0], (*data)[1]);
        data++;
    }
}

/* output a sensor sequence (reg - val) */
static void sccb_w_array(struct gspca_dev *gspca_dev,
            const u8 (*data)[2], int len)
{
    while (--len >= 0) {
        if ((*data)[0] != 0xff) {
            sccb_reg_write(gspca_dev, (*data)[0], (*data)[1]);
        } else {
            sccb_reg_read(gspca_dev, (*data)[1]);
            sccb_reg_write(gspca_dev, 0xff, 0x00);
        }
        data++;
    }
}

/* ov772x specific controls */
static void set_frame_rate(struct gspca_dev *gspca_dev)
{
    struct sd *sd = (struct sd *) gspca_dev;
    int i;
    struct rate_s {
        u8 fps;
        u8 r11;
        u8 r0d;
        u8 re5;
    };
    const struct rate_s *r;
    static const struct rate_s rate_0[] = { /* 640x480 */
        {60, 0x01, 0xc1, 0x04},
        {50, 0x01, 0x41, 0x02},
        {40, 0x02, 0xc1, 0x04},
        {30, 0x04, 0x81, 0x02},
        {15, 0x03, 0x41, 0x04},
    };
    static const struct rate_s rate_1[] = { /* 320x240 */
        {125, 0x02, 0x81, 0x02},
        {100, 0x02, 0xc1, 0x04},
        {75, 0x03, 0xc1, 0x04},
        {60, 0x04, 0xc1, 0x04},
        {50, 0x02, 0x41, 0x04},
        {40, 0x03, 0x41, 0x04},
        {30, 0x04, 0x41, 0x04},
    };

    if (sd->sensor != SENSOR_OV772x)
        return;
    if (gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv == 0) {
        r = rate_0;
        i = ARRAY_SIZE(rate_0);
    } else {
        r = rate_1;
        i = ARRAY_SIZE(rate_1);
    }
    while (--i > 0) {
        if (sd->frame_rate >= r->fps)
            break;
        r++;
    }

    sccb_reg_write(gspca_dev, 0x11, r->r11);
    sccb_reg_write(gspca_dev, 0x0d, r->r0d);
    ov534_reg_write(gspca_dev, 0xe5, r->re5);

    PDEBUG(D_PROBE, "frame_rate: %d", r->fps);
}

static void sethue(struct gspca_dev *gspca_dev, s32 val)
{
    struct sd *sd = (struct sd *) gspca_dev;

    if (sd->sensor == SENSOR_OV767x) {
        /* TBD */
    } else {
        s16 huesin;
        s16 huecos;

        /* fixp_sin and fixp_cos accept only positive values, while
         * our val is between -90 and 90
         */
        val += 360;

        /* According to the datasheet the registers expect HUESIN and
         * HUECOS to be the result of the trigonometric functions,
         * scaled by 0x80.
         *
         * The 0x100 here represents the maximun absolute value
         * returned byt fixp_sin and fixp_cos, so the scaling will
         * consider the result like in the interval [-1.0, 1.0].
         */
        huesin = fixp_sin(val) * 0x80 / 0x100;
        huecos = fixp_cos(val) * 0x80 / 0x100;

        if (huesin < 0) {
            sccb_reg_write(gspca_dev, 0xab,
                sccb_reg_read(gspca_dev, 0xab) | 0x2);
            huesin = -huesin;
        } else {
            sccb_reg_write(gspca_dev, 0xab,
                sccb_reg_read(gspca_dev, 0xab) & ~0x2);

        }
        sccb_reg_write(gspca_dev, 0xa9, (u8)huecos);
        sccb_reg_write(gspca_dev, 0xaa, (u8)huesin);
    }
}

static void setsaturation(struct gspca_dev *gspca_dev, s32 val)
{
    struct sd *sd = (struct sd *) gspca_dev;

    if (sd->sensor == SENSOR_OV767x) {
        int i;
        static u8 color_tb[][6] = {
            {0x42, 0x42, 0x00, 0x11, 0x30, 0x41},
            {0x52, 0x52, 0x00, 0x16, 0x3c, 0x52},
            {0x66, 0x66, 0x00, 0x1b, 0x4b, 0x66},
            {0x80, 0x80, 0x00, 0x22, 0x5e, 0x80},
            {0x9a, 0x9a, 0x00, 0x29, 0x71, 0x9a},
            {0xb8, 0xb8, 0x00, 0x31, 0x87, 0xb8},
            {0xdd, 0xdd, 0x00, 0x3b, 0xa2, 0xdd},
        };

        for (i = 0; i < ARRAY_SIZE(color_tb[0]); i++)
            sccb_reg_write(gspca_dev, 0x4f + i, color_tb[val][i]);
    } else {
        sccb_reg_write(gspca_dev, 0xa7, val); /* U saturation */
        sccb_reg_write(gspca_dev, 0xa8, val); /* V saturation */
    }
}

static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
{
    struct sd *sd = (struct sd *) gspca_dev;

    if (sd->sensor == SENSOR_OV767x) {
        if (val < 0)
            val = 0x80 - val;
        sccb_reg_write(gspca_dev, 0x55, val);   /* bright */
    } else {
        sccb_reg_write(gspca_dev, 0x9b, val);
    }
}

static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
{
    struct sd *sd = (struct sd *) gspca_dev;

    if (sd->sensor == SENSOR_OV767x)
        sccb_reg_write(gspca_dev, 0x56, val);   /* contras */
    else
        sccb_reg_write(gspca_dev, 0x9c, val);
}

static void setgain(struct gspca_dev *gspca_dev, s32 val)
{
    switch (val & 0x30) {
    case 0x00:
        val &= 0x0f;
        break;
    case 0x10:
        val &= 0x0f;
        val |= 0x30;
        break;
    case 0x20:
        val &= 0x0f;
        val |= 0x70;
        break;
    default:
/*  case 0x30: */
        val &= 0x0f;
        val |= 0xf0;
        break;
    }
    sccb_reg_write(gspca_dev, 0x00, val);
}

static s32 getgain(struct gspca_dev *gspca_dev)
{
    return sccb_reg_read(gspca_dev, 0x00);
}

static void setexposure(struct gspca_dev *gspca_dev, s32 val)
{
    struct sd *sd = (struct sd *) gspca_dev;

    if (sd->sensor == SENSOR_OV767x) {

        /* set only aec[9:2] */
        sccb_reg_write(gspca_dev, 0x10, val);   /* aech */
    } else {

        /* 'val' is one byte and represents half of the exposure value
         * we are going to set into registers, a two bytes value:
         *
         *    MSB: ((u16) val << 1) >> 8   == val >> 7
         *    LSB: ((u16) val << 1) & 0xff == val << 1
         */
        sccb_reg_write(gspca_dev, 0x08, val >> 7);
        sccb_reg_write(gspca_dev, 0x10, val << 1);
    }
}

static s32 getexposure(struct gspca_dev *gspca_dev)
{
    struct sd *sd = (struct sd *) gspca_dev;

    if (sd->sensor == SENSOR_OV767x) {
        /* get only aec[9:2] */
        return sccb_reg_read(gspca_dev, 0x10);  /* aech */
    } else {
        u8 hi = sccb_reg_read(gspca_dev, 0x08);
        u8 lo = sccb_reg_read(gspca_dev, 0x10);
        return (hi << 8 | lo) >> 1;
    }
}

static void setagc(struct gspca_dev *gspca_dev, s32 val)
{
    if (val) {
        sccb_reg_write(gspca_dev, 0x13,
                sccb_reg_read(gspca_dev, 0x13) | 0x04);
        sccb_reg_write(gspca_dev, 0x64,
                sccb_reg_read(gspca_dev, 0x64) | 0x03);
    } else {
        sccb_reg_write(gspca_dev, 0x13,
                sccb_reg_read(gspca_dev, 0x13) & ~0x04);
        sccb_reg_write(gspca_dev, 0x64,
                sccb_reg_read(gspca_dev, 0x64) & ~0x03);
    }
}

static void setawb(struct gspca_dev *gspca_dev, s32 val)
{
    struct sd *sd = (struct sd *) gspca_dev;

    if (val) {
        sccb_reg_write(gspca_dev, 0x13,
                sccb_reg_read(gspca_dev, 0x13) | 0x02);
        if (sd->sensor == SENSOR_OV772x)
            sccb_reg_write(gspca_dev, 0x63,
                sccb_reg_read(gspca_dev, 0x63) | 0xc0);
    } else {
        sccb_reg_write(gspca_dev, 0x13,
                sccb_reg_read(gspca_dev, 0x13) & ~0x02);
        if (sd->sensor == SENSOR_OV772x)
            sccb_reg_write(gspca_dev, 0x63,
                sccb_reg_read(gspca_dev, 0x63) & ~0xc0);
    }
}

static void setaec(struct gspca_dev *gspca_dev, s32 val)
{
    struct sd *sd = (struct sd *) gspca_dev;
    u8 data;

    data = sd->sensor == SENSOR_OV767x ?
            0x05 :      /* agc + aec */
            0x01;       /* agc */
    switch (val) {
    case V4L2_EXPOSURE_AUTO:
        sccb_reg_write(gspca_dev, 0x13,
                sccb_reg_read(gspca_dev, 0x13) | data);
        break;
    case V4L2_EXPOSURE_MANUAL:
        sccb_reg_write(gspca_dev, 0x13,
                sccb_reg_read(gspca_dev, 0x13) & ~data);
        break;
    }
}

static void setsharpness(struct gspca_dev *gspca_dev, s32 val)
{
    sccb_reg_write(gspca_dev, 0x91, val);   /* Auto de-noise threshold */
    sccb_reg_write(gspca_dev, 0x8e, val);   /* De-noise threshold */
}

static void sethvflip(struct gspca_dev *gspca_dev, s32 hflip, s32 vflip)
{
    struct sd *sd = (struct sd *) gspca_dev;
    u8 val;

    if (sd->sensor == SENSOR_OV767x) {
        val = sccb_reg_read(gspca_dev, 0x1e);   /* mvfp */
        val &= ~0x30;
        if (hflip)
            val |= 0x20;
        if (vflip)
            val |= 0x10;
        sccb_reg_write(gspca_dev, 0x1e, val);
    } else {
        val = sccb_reg_read(gspca_dev, 0x0c);
        val &= ~0xc0;
        if (hflip == 0)
            val |= 0x40;
        if (vflip == 0)
            val |= 0x80;
        sccb_reg_write(gspca_dev, 0x0c, val);
    }
}

static void setlightfreq(struct gspca_dev *gspca_dev, s32 val)
{
    struct sd *sd = (struct sd *) gspca_dev;

    val = val ? 0x9e : 0x00;
    if (sd->sensor == SENSOR_OV767x) {
        sccb_reg_write(gspca_dev, 0x2a, 0x00);
        if (val)
            val = 0x9d; /* insert dummy to 25fps for 50Hz */
    }
    sccb_reg_write(gspca_dev, 0x2b, val);
}


/* this function is called at probe time */
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;

    cam = &gspca_dev->cam;

    cam->cam_mode = ov772x_mode;
    cam->nmodes = ARRAY_SIZE(ov772x_mode);

    sd->frame_rate = 30;

    return 0;
}

static int ov534_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
    struct sd *sd = container_of(ctrl->handler, struct sd, ctrl_handler);
    struct gspca_dev *gspca_dev = &sd->gspca_dev;

    switch (ctrl->id) {
    case V4L2_CID_AUTOGAIN:
        gspca_dev->usb_err = 0;
        if (ctrl->val && sd->gain && gspca_dev->streaming)
            sd->gain->val = getgain(gspca_dev);
        return gspca_dev->usb_err;

    case V4L2_CID_EXPOSURE_AUTO:
        gspca_dev->usb_err = 0;
        if (ctrl->val == V4L2_EXPOSURE_AUTO && sd->exposure &&
            gspca_dev->streaming)
            sd->exposure->val = getexposure(gspca_dev);
        return gspca_dev->usb_err;
    }
    return -EINVAL;
}

static int ov534_s_ctrl(struct v4l2_ctrl *ctrl)
{
    struct sd *sd = container_of(ctrl->handler, struct sd, ctrl_handler);
    struct gspca_dev *gspca_dev = &sd->gspca_dev;

    gspca_dev->usb_err = 0;
    if (!gspca_dev->streaming)
        return 0;

    switch (ctrl->id) {
    case V4L2_CID_HUE:
        sethue(gspca_dev, ctrl->val);
        break;
    case V4L2_CID_SATURATION:
        setsaturation(gspca_dev, ctrl->val);
        break;
    case V4L2_CID_BRIGHTNESS:
        setbrightness(gspca_dev, ctrl->val);
        break;
    case V4L2_CID_CONTRAST:
        setcontrast(gspca_dev, ctrl->val);
        break;
    case V4L2_CID_AUTOGAIN:
    /* case V4L2_CID_GAIN: */
        setagc(gspca_dev, ctrl->val);
        if (!gspca_dev->usb_err && !ctrl->val && sd->gain)
            setgain(gspca_dev, sd->gain->val);
        break;
    case V4L2_CID_AUTO_WHITE_BALANCE:
        setawb(gspca_dev, ctrl->val);
        break;
    case V4L2_CID_EXPOSURE_AUTO:
    /* case V4L2_CID_EXPOSURE: */
        setaec(gspca_dev, ctrl->val);
        if (!gspca_dev->usb_err && ctrl->val == V4L2_EXPOSURE_MANUAL &&
            sd->exposure)
            setexposure(gspca_dev, sd->exposure->val);
        break;
    case V4L2_CID_SHARPNESS:
        setsharpness(gspca_dev, ctrl->val);
        break;
    case V4L2_CID_HFLIP:
        sethvflip(gspca_dev, ctrl->val, sd->vflip->val);
        break;
    case V4L2_CID_VFLIP:
        sethvflip(gspca_dev, sd->hflip->val, ctrl->val);
        break;
    case V4L2_CID_POWER_LINE_FREQUENCY:
        setlightfreq(gspca_dev, ctrl->val);
        break;
    }
    return gspca_dev->usb_err;
}

static const struct v4l2_ctrl_ops ov534_ctrl_ops = {
    .g_volatile_ctrl = ov534_g_volatile_ctrl,
    .s_ctrl = ov534_s_ctrl,
};

static int sd_init_controls(struct gspca_dev *gspca_dev)
{
    struct sd *sd = (struct sd *) gspca_dev;
    struct v4l2_ctrl_handler *hdl = &sd->ctrl_handler;
    /* parameters with different values between the supported sensors */
    int saturation_min;
    int saturation_max;
    int saturation_def;
    int brightness_min;
    int brightness_max;
    int brightness_def;
    int contrast_max;
    int contrast_def;
    int exposure_min;
    int exposure_max;
    int exposure_def;
    int hflip_def;

    if (sd->sensor == SENSOR_OV767x) {
        saturation_min = 0,
        saturation_max = 6,
        saturation_def = 3,
        brightness_min = -127;
        brightness_max = 127;
        brightness_def = 0;
        contrast_max = 0x80;
        contrast_def = 0x40;
        exposure_min = 0x08;
        exposure_max = 0x60;
        exposure_def = 0x13;
        hflip_def = 1;
    } else {
        saturation_min = 0,
        saturation_max = 255,
        saturation_def = 64,
        brightness_min = 0;
        brightness_max = 255;
        brightness_def = 0;
        contrast_max = 255;
        contrast_def = 32;
        exposure_min = 0;
        exposure_max = 255;
        exposure_def = 120;
        hflip_def = 0;
    }

    gspca_dev->vdev.ctrl_handler = hdl;

    v4l2_ctrl_handler_init(hdl, 13);

    if (sd->sensor == SENSOR_OV772x)
        sd->hue = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
                V4L2_CID_HUE, -90, 90, 1, 0);

    sd->saturation = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
            V4L2_CID_SATURATION, saturation_min, saturation_max, 1,
            saturation_def);
    sd->brightness = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
            V4L2_CID_BRIGHTNESS, brightness_min, brightness_max, 1,
            brightness_def);
    sd->contrast = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
            V4L2_CID_CONTRAST, 0, contrast_max, 1, contrast_def);

    if (sd->sensor == SENSOR_OV772x) {
        sd->autogain = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
                V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
        sd->gain = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
                V4L2_CID_GAIN, 0, 63, 1, 20);
    }

    sd->autoexposure = v4l2_ctrl_new_std_menu(hdl, &ov534_ctrl_ops,
            V4L2_CID_EXPOSURE_AUTO,
            V4L2_EXPOSURE_MANUAL, 0,
            V4L2_EXPOSURE_AUTO);
    sd->exposure = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
            V4L2_CID_EXPOSURE, exposure_min, exposure_max, 1,
            exposure_def);

    sd->autowhitebalance = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
            V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);

    if (sd->sensor == SENSOR_OV772x)
        sd->sharpness = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
                V4L2_CID_SHARPNESS, 0, 63, 1, 0);

    sd->hflip = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
            V4L2_CID_HFLIP, 0, 1, 1, hflip_def);
    sd->vflip = v4l2_ctrl_new_std(hdl, &ov534_ctrl_ops,
            V4L2_CID_VFLIP, 0, 1, 1, 0);
    sd->plfreq = v4l2_ctrl_new_std_menu(hdl, &ov534_ctrl_ops,
            V4L2_CID_POWER_LINE_FREQUENCY,
            V4L2_CID_POWER_LINE_FREQUENCY_50HZ, 0,
            V4L2_CID_POWER_LINE_FREQUENCY_DISABLED);

    if (hdl->error) {
        pr_err("Could not initialize controls\n");
        return hdl->error;
    }

    if (sd->sensor == SENSOR_OV772x)
        v4l2_ctrl_auto_cluster(2, &sd->autogain, 0, true);

    v4l2_ctrl_auto_cluster(2, &sd->autoexposure, V4L2_EXPOSURE_MANUAL,
                   true);

    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;
    u16 sensor_id;
    static const struct reg_array bridge_init[NSENSORS] = {
    [SENSOR_OV767x] = {bridge_init_767x, ARRAY_SIZE(bridge_init_767x)},
    [SENSOR_OV772x] = {bridge_init_772x, ARRAY_SIZE(bridge_init_772x)},
    };
    static const struct reg_array sensor_init[NSENSORS] = {
    [SENSOR_OV767x] = {sensor_init_767x, ARRAY_SIZE(sensor_init_767x)},
    [SENSOR_OV772x] = {sensor_init_772x, ARRAY_SIZE(sensor_init_772x)},
    };

    /* reset bridge */
    ov534_reg_write(gspca_dev, 0xe7, 0x3a);
    ov534_reg_write(gspca_dev, 0xe0, 0x08);
    msleep(100);

    /* initialize the sensor address */
    ov534_reg_write(gspca_dev, OV534_REG_ADDRESS, 0x42);

    /* reset sensor */
    sccb_reg_write(gspca_dev, 0x12, 0x80);
    msleep(10);

    /* probe the sensor */
    sccb_reg_read(gspca_dev, 0x0a);
    sensor_id = sccb_reg_read(gspca_dev, 0x0a) << 8;
    sccb_reg_read(gspca_dev, 0x0b);
    sensor_id |= sccb_reg_read(gspca_dev, 0x0b);
    PDEBUG(D_PROBE, "Sensor ID: %04x", sensor_id);

    if ((sensor_id & 0xfff0) == 0x7670) {
        sd->sensor = SENSOR_OV767x;
        gspca_dev->cam.cam_mode = ov767x_mode;
        gspca_dev->cam.nmodes = ARRAY_SIZE(ov767x_mode);
    } else {
        sd->sensor = SENSOR_OV772x;
        gspca_dev->cam.bulk = 1;
        gspca_dev->cam.bulk_size = 16384;
        gspca_dev->cam.bulk_nurbs = 2;
        gspca_dev->cam.mode_framerates = ov772x_framerates;
    }

    /* initialize */
    reg_w_array(gspca_dev, bridge_init[sd->sensor].val,
            bridge_init[sd->sensor].len);
    ov534_set_led(gspca_dev, 1);
    sccb_w_array(gspca_dev, sensor_init[sd->sensor].val,
            sensor_init[sd->sensor].len);
    if (sd->sensor == SENSOR_OV767x)
        sd_start(gspca_dev);
    sd_stopN(gspca_dev);
/*  set_frame_rate(gspca_dev);  */

    return gspca_dev->usb_err;
}

static int sd_start(struct gspca_dev *gspca_dev)
{
    struct sd *sd = (struct sd *) gspca_dev;
    int mode;
    static const struct reg_array bridge_start[NSENSORS][2] = {
    [SENSOR_OV767x] = {{bridge_start_qvga_767x,
                    ARRAY_SIZE(bridge_start_qvga_767x)},
            {bridge_start_vga_767x,
                    ARRAY_SIZE(bridge_start_vga_767x)}},
    [SENSOR_OV772x] = {{bridge_start_qvga_772x,
                    ARRAY_SIZE(bridge_start_qvga_772x)},
            {bridge_start_vga_772x,
                    ARRAY_SIZE(bridge_start_vga_772x)}},
    };
    static const struct reg_array sensor_start[NSENSORS][2] = {
    [SENSOR_OV767x] = {{sensor_start_qvga_767x,
                    ARRAY_SIZE(sensor_start_qvga_767x)},
            {sensor_start_vga_767x,
                    ARRAY_SIZE(sensor_start_vga_767x)}},
    [SENSOR_OV772x] = {{sensor_start_qvga_772x,
                    ARRAY_SIZE(sensor_start_qvga_772x)},
            {sensor_start_vga_772x,
                    ARRAY_SIZE(sensor_start_vga_772x)}},
    };

    /* (from ms-win trace) */
    if (sd->sensor == SENSOR_OV767x)
        sccb_reg_write(gspca_dev, 0x1e, 0x04);
                    /* black sun enable ? */

    mode = gspca_dev->curr_mode;    /* 0: 320x240, 1: 640x480 */
    reg_w_array(gspca_dev, bridge_start[sd->sensor][mode].val,
                bridge_start[sd->sensor][mode].len);
    sccb_w_array(gspca_dev, sensor_start[sd->sensor][mode].val,
                sensor_start[sd->sensor][mode].len);

    set_frame_rate(gspca_dev);

    if (sd->hue)
        sethue(gspca_dev, v4l2_ctrl_g_ctrl(sd->hue));
    setsaturation(gspca_dev, v4l2_ctrl_g_ctrl(sd->saturation));
    if (sd->autogain)
        setagc(gspca_dev, v4l2_ctrl_g_ctrl(sd->autogain));
    setawb(gspca_dev, v4l2_ctrl_g_ctrl(sd->autowhitebalance));
    setaec(gspca_dev, v4l2_ctrl_g_ctrl(sd->autoexposure));
    if (sd->gain)
        setgain(gspca_dev, v4l2_ctrl_g_ctrl(sd->gain));
    setexposure(gspca_dev, v4l2_ctrl_g_ctrl(sd->exposure));
    setbrightness(gspca_dev, v4l2_ctrl_g_ctrl(sd->brightness));
    setcontrast(gspca_dev, v4l2_ctrl_g_ctrl(sd->contrast));
    if (sd->sharpness)
        setsharpness(gspca_dev, v4l2_ctrl_g_ctrl(sd->sharpness));
    sethvflip(gspca_dev, v4l2_ctrl_g_ctrl(sd->hflip),
          v4l2_ctrl_g_ctrl(sd->vflip));
    setlightfreq(gspca_dev, v4l2_ctrl_g_ctrl(sd->plfreq));

    ov534_set_led(gspca_dev, 1);
    ov534_reg_write(gspca_dev, 0xe0, 0x00);
    return gspca_dev->usb_err;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
    ov534_reg_write(gspca_dev, 0xe0, 0x09);
    ov534_set_led(gspca_dev, 0);
}

/* Values for bmHeaderInfo (Video and Still Image Payload Headers, 2.4.3.3) */
#define UVC_STREAM_EOH  (1 << 7)
#define UVC_STREAM_ERR  (1 << 6)
#define UVC_STREAM_STI  (1 << 5)
#define UVC_STREAM_RES  (1 << 4)
#define UVC_STREAM_SCR  (1 << 3)
#define UVC_STREAM_PTS  (1 << 2)
#define UVC_STREAM_EOF  (1 << 1)
#define UVC_STREAM_FID  (1 << 0)

static void sd_pkt_scan(struct gspca_dev *gspca_dev,
            u8 *data, int len)
{
    struct sd *sd = (struct sd *) gspca_dev;
    __u32 this_pts;
    u16 this_fid;
    int remaining_len = len;
    int payload_len;

    payload_len = gspca_dev->cam.bulk ? 2048 : 2040;
    do {
        len = min(remaining_len, payload_len);

        /* Payloads are prefixed with a UVC-style header.  We
           consider a frame to start when the FID toggles, or the PTS
           changes.  A frame ends when EOF is set, and we've received
           the correct number of bytes. */

        /* Verify UVC header.  Header length is always 12 */
        if (data[0] != 12 || len < 12) {
            PDEBUG(D_PACK, "bad header");
            goto discard;
        }

        /* Check errors */
        if (data[1] & UVC_STREAM_ERR) {
            PDEBUG(D_PACK, "payload error");
            goto discard;
        }

        /* Extract PTS and FID */
        if (!(data[1] & UVC_STREAM_PTS)) {
            PDEBUG(D_PACK, "PTS not present");
            goto discard;
        }
        this_pts = (data[5] << 24) | (data[4] << 16)
                        | (data[3] << 8) | data[2];
        this_fid = (data[1] & UVC_STREAM_FID) ? 1 : 0;

        /* If PTS or FID has changed, start a new frame. */
        if (this_pts != sd->last_pts || this_fid != sd->last_fid) {
            if (gspca_dev->last_packet_type == INTER_PACKET)
                gspca_frame_add(gspca_dev, LAST_PACKET,
                        NULL, 0);
            sd->last_pts = this_pts;
            sd->last_fid = this_fid;
            gspca_frame_add(gspca_dev, FIRST_PACKET,
                    data + 12, len - 12);
        /* If this packet is marked as EOF, end the frame */
        } else if (data[1] & UVC_STREAM_EOF) {
            sd->last_pts = 0;
            if (gspca_dev->pixfmt == V4L2_PIX_FMT_YUYV
             && gspca_dev->image_len + len - 12 !=
                   gspca_dev->width * gspca_dev->height * 2) {
                PDEBUG(D_PACK, "wrong sized frame");
                goto discard;
            }
            gspca_frame_add(gspca_dev, LAST_PACKET,
                    data + 12, len - 12);
        } else {

            /* Add the data from this payload */
            gspca_frame_add(gspca_dev, INTER_PACKET,
                    data + 12, len - 12);
        }

        /* Done this payload */
        goto scan_next;

discard:
        /* Discard data until a new frame starts. */
        gspca_dev->last_packet_type = DISCARD_PACKET;

scan_next:
        remaining_len -= len;
        data += len;
    } while (remaining_len > 0);
}

/* get stream parameters (framerate) */
static void sd_get_streamparm(struct gspca_dev *gspca_dev,
                 struct v4l2_streamparm *parm)
{
    struct v4l2_captureparm *cp = &parm->parm.capture;
    struct v4l2_fract *tpf = &cp->timeperframe;
    struct sd *sd = (struct sd *) gspca_dev;

    cp->capability |= V4L2_CAP_TIMEPERFRAME;
    tpf->numerator = 1;
    tpf->denominator = sd->frame_rate;
}

/* set stream parameters (framerate) */
static void sd_set_streamparm(struct gspca_dev *gspca_dev,
                 struct v4l2_streamparm *parm)
{
    struct v4l2_captureparm *cp = &parm->parm.capture;
    struct v4l2_fract *tpf = &cp->timeperframe;
    struct sd *sd = (struct sd *) gspca_dev;

    /* Set requested framerate */
    sd->frame_rate = tpf->denominator / tpf->numerator;
    if (gspca_dev->streaming)
        set_frame_rate(gspca_dev);

    /* Return the actual framerate */
    tpf->numerator = 1;
    tpf->denominator = sd->frame_rate;
}

/* sub-driver description */
static const struct sd_desc sd_desc = {
    .name     = MODULE_NAME,
    .config   = sd_config,
    .init     = sd_init,
    .init_controls = sd_init_controls,
    .start    = sd_start,
    .stopN    = sd_stopN,
    .pkt_scan = sd_pkt_scan,
    .get_streamparm = sd_get_streamparm,
    .set_streamparm = sd_set_streamparm,
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
    {USB_DEVICE(0x1415, 0x2000)},
    {USB_DEVICE(0x06f8, 0x3002)},
    {}
};

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);