// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * SPCA505 chip based cameras initialization data
 *
 * V4L2 by Jean-Francis Moine <http://moinejf.free.fr>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define MODULE_NAME "spca505"

#include "gspca.h"

MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
MODULE_DESCRIPTION("GSPCA/SPCA505 USB Camera Driver");
MODULE_LICENSE("GPL");

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

        u8 subtype;
#define IntelPCCameraPro 0
#define Nxultra 1
};

static const struct v4l2_pix_format vga_mode[] = {
        {160, 120, V4L2_PIX_FMT_SPCA505, V4L2_FIELD_NONE,
                .bytesperline = 160,
                .sizeimage = 160 * 120 * 3 / 2,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 4},
        {176, 144, V4L2_PIX_FMT_SPCA505, V4L2_FIELD_NONE,
                .bytesperline = 176,
                .sizeimage = 176 * 144 * 3 / 2,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 3},
        {320, 240, V4L2_PIX_FMT_SPCA505, V4L2_FIELD_NONE,
                .bytesperline = 320,
                .sizeimage = 320 * 240 * 3 / 2,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 2},
        {352, 288, V4L2_PIX_FMT_SPCA505, V4L2_FIELD_NONE,
                .bytesperline = 352,
                .sizeimage = 352 * 288 * 3 / 2,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 1},
        {640, 480, V4L2_PIX_FMT_SPCA505, V4L2_FIELD_NONE,
                .bytesperline = 640,
                .sizeimage = 640 * 480 * 3 / 2,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 0},
};

#define SPCA50X_OFFSET_DATA 10

#define SPCA50X_REG_USB 0x02    /* spca505 501 */

#define SPCA50X_USB_CTRL 0x00   /* spca505 */
#define SPCA50X_CUSB_ENABLE 0x01 /* spca505 */

#define SPCA50X_REG_GLOBAL 0x03 /* spca505 */
#define SPCA50X_GMISC0_IDSEL 0x01 /* Global control device ID select spca505 */
#define SPCA50X_GLOBAL_MISC0 0x00 /* Global control miscellaneous 0 spca505 */

#define SPCA50X_GLOBAL_MISC1 0x01 /* 505 */
#define SPCA50X_GLOBAL_MISC3 0x03 /* 505 */
#define SPCA50X_GMISC3_SAA7113RST 0x20  /* Not sure about this one spca505 */

/* Image format and compression control */
#define SPCA50X_REG_COMPRESS 0x04

/*
 * Data to initialize a SPCA505. Common to the CCD and external modes
 */
static const u8 spca505_init_data[][3] = {
        /* bmRequest,value,index */
        {SPCA50X_REG_GLOBAL, SPCA50X_GMISC3_SAA7113RST, SPCA50X_GLOBAL_MISC3},
        /* Sensor reset */
        {SPCA50X_REG_GLOBAL, 0x00, SPCA50X_GLOBAL_MISC3},
        {SPCA50X_REG_GLOBAL, 0x00, SPCA50X_GLOBAL_MISC1},
        /* Block USB reset */
        {SPCA50X_REG_GLOBAL, SPCA50X_GMISC0_IDSEL, SPCA50X_GLOBAL_MISC0},

        {0x05, 0x01, 0x10},
                                        /* Maybe power down some stuff */
        {0x05, 0x0f, 0x11},

        /* Setup internal CCD  ? */
        {0x06, 0x10, 0x08},
        {0x06, 0x00, 0x09},
        {0x06, 0x00, 0x0a},
        {0x06, 0x00, 0x0b},
        {0x06, 0x10, 0x0c},
        {0x06, 0x00, 0x0d},
        {0x06, 0x00, 0x0e},
        {0x06, 0x00, 0x0f},
        {0x06, 0x10, 0x10},
        {0x06, 0x02, 0x11},
        {0x06, 0x00, 0x12},
        {0x06, 0x04, 0x13},
        {0x06, 0x02, 0x14},
        {0x06, 0x8a, 0x51},
        {0x06, 0x40, 0x52},
        {0x06, 0xb6, 0x53},
        {0x06, 0x3d, 0x54},
        {}
};

/*
 * Data to initialize the camera using the internal CCD
 */
static const u8 spca505_open_data_ccd[][3] = {
        /* bmRequest,value,index */
        /* Internal CCD data set */
        {0x03, 0x04, 0x01},
        /* This could be a reset */
        {0x03, 0x00, 0x01},

        /* Setup compression and image registers. 0x6 and 0x7 seem to be
           related to H&V hold, and are resolution mode specific */
                {0x04, 0x10, 0x01},
                /* DIFF(0x50), was (0x10) */
        {0x04, 0x00, 0x04},
        {0x04, 0x00, 0x05},
        {0x04, 0x20, 0x06},
        {0x04, 0x20, 0x07},

        {0x08, 0x0a, 0x00},
        /* DIFF (0x4a), was (0xa) */

        {0x05, 0x00, 0x10},
        {0x05, 0x00, 0x11},
        {0x05, 0x00, 0x00},
        /* DIFF not written */
        {0x05, 0x00, 0x01},
        /* DIFF not written */
        {0x05, 0x00, 0x02},
        /* DIFF not written */
        {0x05, 0x00, 0x03},
        /* DIFF not written */
        {0x05, 0x00, 0x04},
        /* DIFF not written */
                {0x05, 0x80, 0x05},
                /* DIFF not written */
                {0x05, 0xe0, 0x06},
                /* DIFF not written */
                {0x05, 0x20, 0x07},
                /* DIFF not written */
                {0x05, 0xa0, 0x08},
                /* DIFF not written */
                {0x05, 0x0, 0x12},
                /* DIFF not written */
        {0x05, 0x02, 0x0f},
        /* DIFF not written */
                {0x05, 0x10, 0x46},
                /* DIFF not written */
                {0x05, 0x8, 0x4a},
                /* DIFF not written */

        {0x03, 0x08, 0x03},
        /* DIFF (0x3,0x28,0x3) */
        {0x03, 0x08, 0x01},
        {0x03, 0x0c, 0x03},
        /* DIFF not written */
                {0x03, 0x21, 0x00},
                /* DIFF (0x39) */

/* Extra block copied from init to hopefully ensure CCD is in a sane state */
        {0x06, 0x10, 0x08},
        {0x06, 0x00, 0x09},
        {0x06, 0x00, 0x0a},
        {0x06, 0x00, 0x0b},
        {0x06, 0x10, 0x0c},
        {0x06, 0x00, 0x0d},
        {0x06, 0x00, 0x0e},
        {0x06, 0x00, 0x0f},
        {0x06, 0x10, 0x10},
        {0x06, 0x02, 0x11},
        {0x06, 0x00, 0x12},
        {0x06, 0x04, 0x13},
        {0x06, 0x02, 0x14},
        {0x06, 0x8a, 0x51},
        {0x06, 0x40, 0x52},
        {0x06, 0xb6, 0x53},
        {0x06, 0x3d, 0x54},
        /* End of extra block */

                {0x06, 0x3f, 0x1},
                /* Block skipped */
        {0x06, 0x10, 0x02},
        {0x06, 0x64, 0x07},
        {0x06, 0x10, 0x08},
        {0x06, 0x00, 0x09},
        {0x06, 0x00, 0x0a},
        {0x06, 0x00, 0x0b},
        {0x06, 0x10, 0x0c},
        {0x06, 0x00, 0x0d},
        {0x06, 0x00, 0x0e},
        {0x06, 0x00, 0x0f},
        {0x06, 0x10, 0x10},
        {0x06, 0x02, 0x11},
        {0x06, 0x00, 0x12},
        {0x06, 0x04, 0x13},
        {0x06, 0x02, 0x14},
        {0x06, 0x8a, 0x51},
        {0x06, 0x40, 0x52},
        {0x06, 0xb6, 0x53},
        {0x06, 0x3d, 0x54},
        {0x06, 0x60, 0x57},
        {0x06, 0x20, 0x58},
        {0x06, 0x15, 0x59},
        {0x06, 0x05, 0x5a},

        {0x05, 0x01, 0xc0},
        {0x05, 0x10, 0xcb},
                {0x05, 0x80, 0xc1},
                /* */
                {0x05, 0x0, 0xc2},
                /* 4 was 0 */
        {0x05, 0x00, 0xca},
                {0x05, 0x80, 0xc1},
                /*  */
        {0x05, 0x04, 0xc2},
        {0x05, 0x00, 0xca},
                {0x05, 0x0, 0xc1},
                /*  */
        {0x05, 0x00, 0xc2},
        {0x05, 0x00, 0xca},
                {0x05, 0x40, 0xc1},
                /* */
        {0x05, 0x17, 0xc2},
        {0x05, 0x00, 0xca},
                {0x05, 0x80, 0xc1},
                /* */
        {0x05, 0x06, 0xc2},
        {0x05, 0x00, 0xca},
                {0x05, 0x80, 0xc1},
                /* */
        {0x05, 0x04, 0xc2},
        {0x05, 0x00, 0xca},

        {0x03, 0x4c, 0x3},
        {0x03, 0x18, 0x1},

        {0x06, 0x70, 0x51},
        {0x06, 0xbe, 0x53},
        {0x06, 0x71, 0x57},
        {0x06, 0x20, 0x58},
        {0x06, 0x05, 0x59},
        {0x06, 0x15, 0x5a},

        {0x04, 0x00, 0x08},
        /* Compress = OFF (0x1 to turn on) */
        {0x04, 0x12, 0x09},
        {0x04, 0x21, 0x0a},
        {0x04, 0x10, 0x0b},
        {0x04, 0x21, 0x0c},
        {0x04, 0x05, 0x00},
        /* was 5 (Image Type ? ) */
        {0x04, 0x00, 0x01},

        {0x06, 0x3f, 0x01},

        {0x04, 0x00, 0x04},
        {0x04, 0x00, 0x05},
        {0x04, 0x40, 0x06},
        {0x04, 0x40, 0x07},

        {0x06, 0x1c, 0x17},
        {0x06, 0xe2, 0x19},
        {0x06, 0x1c, 0x1b},
        {0x06, 0xe2, 0x1d},
        {0x06, 0xaa, 0x1f},
        {0x06, 0x70, 0x20},

        {0x05, 0x01, 0x10},
        {0x05, 0x00, 0x11},
        {0x05, 0x01, 0x00},
        {0x05, 0x05, 0x01},
                {0x05, 0x00, 0xc1},
                /* */
        {0x05, 0x00, 0xc2},
        {0x05, 0x00, 0xca},

        {0x06, 0x70, 0x51},
        {0x06, 0xbe, 0x53},
        {}
};

/*
 * Made by Tomasz Zablocki (skalamandra@poczta.onet.pl)
 * SPCA505b chip based cameras initialization data
 */
/* jfm */
#define initial_brightness 0x7f /* 0x0(white)-0xff(black) */
/* #define initial_brightness 0x0       //0x0(white)-0xff(black) */
/*
 * Data to initialize a SPCA505. Common to the CCD and external modes
 */
static const u8 spca505b_init_data[][3] = {
/* start */
        {0x02, 0x00, 0x00},             /* init */
        {0x02, 0x00, 0x01},
        {0x02, 0x00, 0x02},
        {0x02, 0x00, 0x03},
        {0x02, 0x00, 0x04},
        {0x02, 0x00, 0x05},
        {0x02, 0x00, 0x06},
        {0x02, 0x00, 0x07},
        {0x02, 0x00, 0x08},
        {0x02, 0x00, 0x09},
        {0x03, 0x00, 0x00},
        {0x03, 0x00, 0x01},
        {0x03, 0x00, 0x02},
        {0x03, 0x00, 0x03},
        {0x03, 0x00, 0x04},
        {0x03, 0x00, 0x05},
        {0x03, 0x00, 0x06},
        {0x04, 0x00, 0x00},
        {0x04, 0x00, 0x02},
        {0x04, 0x00, 0x04},
        {0x04, 0x00, 0x05},
        {0x04, 0x00, 0x06},
        {0x04, 0x00, 0x07},
        {0x04, 0x00, 0x08},
        {0x04, 0x00, 0x09},
        {0x04, 0x00, 0x0a},
        {0x04, 0x00, 0x0b},
        {0x04, 0x00, 0x0c},
        {0x07, 0x00, 0x00},
        {0x07, 0x00, 0x03},
        {0x08, 0x00, 0x00},
        {0x08, 0x00, 0x01},
        {0x08, 0x00, 0x02},
        {0x06, 0x18, 0x08},
        {0x06, 0xfc, 0x09},
        {0x06, 0xfc, 0x0a},
        {0x06, 0xfc, 0x0b},
        {0x06, 0x18, 0x0c},
        {0x06, 0xfc, 0x0d},
        {0x06, 0xfc, 0x0e},
        {0x06, 0xfc, 0x0f},
        {0x06, 0x18, 0x10},
        {0x06, 0xfe, 0x12},
        {0x06, 0x00, 0x11},
        {0x06, 0x00, 0x14},
        {0x06, 0x00, 0x13},
        {0x06, 0x28, 0x51},
        {0x06, 0xff, 0x53},
        {0x02, 0x00, 0x08},

        {0x03, 0x00, 0x03},
        {0x03, 0x10, 0x03},
        {}
};

/*
 * Data to initialize the camera using the internal CCD
 */
static const u8 spca505b_open_data_ccd[][3] = {

/* {0x02,0x00,0x00}, */
        {0x03, 0x04, 0x01},             /* rst */
        {0x03, 0x00, 0x01},
        {0x03, 0x00, 0x00},
        {0x03, 0x21, 0x00},
        {0x03, 0x00, 0x04},
        {0x03, 0x00, 0x03},
        {0x03, 0x18, 0x03},
        {0x03, 0x08, 0x01},
        {0x03, 0x1c, 0x03},
        {0x03, 0x5c, 0x03},
        {0x03, 0x5c, 0x03},
        {0x03, 0x18, 0x01},

/* same as 505 */
        {0x04, 0x10, 0x01},
        {0x04, 0x00, 0x04},
        {0x04, 0x00, 0x05},
        {0x04, 0x20, 0x06},
        {0x04, 0x20, 0x07},

        {0x08, 0x0a, 0x00},

        {0x05, 0x00, 0x10},
        {0x05, 0x00, 0x11},
        {0x05, 0x00, 0x12},
        {0x05, 0x6f, 0x00},
        {0x05, initial_brightness >> 6, 0x00},
        {0x05, (initial_brightness << 2) & 0xff, 0x01},
        {0x05, 0x00, 0x02},
        {0x05, 0x01, 0x03},
        {0x05, 0x00, 0x04},
        {0x05, 0x03, 0x05},
        {0x05, 0xe0, 0x06},
        {0x05, 0x20, 0x07},
        {0x05, 0xa0, 0x08},
        {0x05, 0x00, 0x12},
        {0x05, 0x02, 0x0f},
        {0x05, 0x80, 0x14},             /* max exposure off (0=on) */
        {0x05, 0x01, 0xb0},
        {0x05, 0x01, 0xbf},
        {0x03, 0x02, 0x06},
        {0x05, 0x10, 0x46},
        {0x05, 0x08, 0x4a},

        {0x06, 0x00, 0x01},
        {0x06, 0x10, 0x02},
        {0x06, 0x64, 0x07},
        {0x06, 0x18, 0x08},
        {0x06, 0xfc, 0x09},
        {0x06, 0xfc, 0x0a},
        {0x06, 0xfc, 0x0b},
        {0x04, 0x00, 0x01},
        {0x06, 0x18, 0x0c},
        {0x06, 0xfc, 0x0d},
        {0x06, 0xfc, 0x0e},
        {0x06, 0xfc, 0x0f},
        {0x06, 0x11, 0x10},             /* contrast */
        {0x06, 0x00, 0x11},
        {0x06, 0xfe, 0x12},
        {0x06, 0x00, 0x13},
        {0x06, 0x00, 0x14},
        {0x06, 0x9d, 0x51},
        {0x06, 0x40, 0x52},
        {0x06, 0x7c, 0x53},
        {0x06, 0x40, 0x54},
        {0x06, 0x02, 0x57},
        {0x06, 0x03, 0x58},
        {0x06, 0x15, 0x59},
        {0x06, 0x05, 0x5a},
        {0x06, 0x03, 0x56},
        {0x06, 0x02, 0x3f},
        {0x06, 0x00, 0x40},
        {0x06, 0x39, 0x41},
        {0x06, 0x69, 0x42},
        {0x06, 0x87, 0x43},
        {0x06, 0x9e, 0x44},
        {0x06, 0xb1, 0x45},
        {0x06, 0xbf, 0x46},
        {0x06, 0xcc, 0x47},
        {0x06, 0xd5, 0x48},
        {0x06, 0xdd, 0x49},
        {0x06, 0xe3, 0x4a},
        {0x06, 0xe8, 0x4b},
        {0x06, 0xed, 0x4c},
        {0x06, 0xf2, 0x4d},
        {0x06, 0xf7, 0x4e},
        {0x06, 0xfc, 0x4f},
        {0x06, 0xff, 0x50},

        {0x05, 0x01, 0xc0},
        {0x05, 0x10, 0xcb},
        {0x05, 0x40, 0xc1},
        {0x05, 0x04, 0xc2},
        {0x05, 0x00, 0xca},
        {0x05, 0x40, 0xc1},
        {0x05, 0x09, 0xc2},
        {0x05, 0x00, 0xca},
        {0x05, 0xc0, 0xc1},
        {0x05, 0x09, 0xc2},
        {0x05, 0x00, 0xca},
        {0x05, 0x40, 0xc1},
        {0x05, 0x59, 0xc2},
        {0x05, 0x00, 0xca},
        {0x04, 0x00, 0x01},
        {0x05, 0x80, 0xc1},
        {0x05, 0xec, 0xc2},
        {0x05, 0x0, 0xca},

        {0x06, 0x02, 0x57},
        {0x06, 0x01, 0x58},
        {0x06, 0x15, 0x59},
        {0x06, 0x0a, 0x5a},
        {0x06, 0x01, 0x57},
        {0x06, 0x8a, 0x03},
        {0x06, 0x0a, 0x6c},
        {0x06, 0x30, 0x01},
        {0x06, 0x20, 0x02},
        {0x06, 0x00, 0x03},

        {0x05, 0x8c, 0x25},

        {0x06, 0x4d, 0x51},             /* maybe saturation (4d) */
        {0x06, 0x84, 0x53},             /* making green (84) */
        {0x06, 0x00, 0x57},             /* sharpness (1) */
        {0x06, 0x18, 0x08},
        {0x06, 0xfc, 0x09},
        {0x06, 0xfc, 0x0a},
        {0x06, 0xfc, 0x0b},
        {0x06, 0x18, 0x0c},             /* maybe hue (18) */
        {0x06, 0xfc, 0x0d},
        {0x06, 0xfc, 0x0e},
        {0x06, 0xfc, 0x0f},
        {0x06, 0x18, 0x10},             /* maybe contrast (18) */

        {0x05, 0x01, 0x02},

        {0x04, 0x00, 0x08},             /* compression */
        {0x04, 0x12, 0x09},
        {0x04, 0x21, 0x0a},
        {0x04, 0x10, 0x0b},
        {0x04, 0x21, 0x0c},
        {0x04, 0x1d, 0x00},             /* imagetype (1d) */
        {0x04, 0x41, 0x01},             /* hardware snapcontrol */

        {0x04, 0x00, 0x04},
        {0x04, 0x00, 0x05},
        {0x04, 0x10, 0x06},
        {0x04, 0x10, 0x07},
        {0x04, 0x40, 0x06},
        {0x04, 0x40, 0x07},
        {0x04, 0x00, 0x04},
        {0x04, 0x00, 0x05},

        {0x06, 0x1c, 0x17},
        {0x06, 0xe2, 0x19},
        {0x06, 0x1c, 0x1b},
        {0x06, 0xe2, 0x1d},
        {0x06, 0x5f, 0x1f},
        {0x06, 0x32, 0x20},

        {0x05, initial_brightness >> 6, 0x00},
        {0x05, (initial_brightness << 2) & 0xff, 0x01},
        {0x05, 0x06, 0xc1},
        {0x05, 0x58, 0xc2},
        {0x05, 0x00, 0xca},
        {0x05, 0x00, 0x11},
        {}
};

static int reg_write(struct gspca_dev *gspca_dev,
                     u16 req, u16 index, u16 value)
{
        int ret;
        struct usb_device *dev = gspca_dev->dev;

        ret = usb_control_msg(dev,
                        usb_sndctrlpipe(dev, 0),
                        req,
                        USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                        value, index, NULL, 0, 500);
        gspca_dbg(gspca_dev, D_USBO, "reg write: 0x%02x,0x%02x:0x%02x, %d\n",
                  req, index, value, ret);
        if (ret < 0)
                pr_err("reg write: error %d\n", ret);
        return ret;
}

/* returns: negative is error, pos or zero is data */
static int reg_read(struct gspca_dev *gspca_dev,
                        u16 req,        /* bRequest */
                        u16 index)      /* wIndex */
{
        int ret;

        ret = usb_control_msg(gspca_dev->dev,
                        usb_rcvctrlpipe(gspca_dev->dev, 0),
                        req,
                        USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                        0,                      /* value */
                        index,
                        gspca_dev->usb_buf, 2,
                        500);                   /* timeout */
        if (ret < 0)
                return ret;
        return (gspca_dev->usb_buf[1] << 8) + gspca_dev->usb_buf[0];
}

static int write_vector(struct gspca_dev *gspca_dev,
                        const u8 data[][3])
{
        int ret, i = 0;

        while (data[i][0] != 0) {
                ret = reg_write(gspca_dev, data[i][0], data[i][2],
                                                                data[i][1]);
                if (ret < 0)
                        return ret;
                i++;
        }
        return 0;
}

/* 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 = vga_mode;
        sd->subtype = id->driver_info;
        if (sd->subtype != IntelPCCameraPro)
                cam->nmodes = ARRAY_SIZE(vga_mode);
        else                    /* no 640x480 for IntelPCCameraPro */
                cam->nmodes = ARRAY_SIZE(vga_mode) - 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;

        if (write_vector(gspca_dev,
                         sd->subtype == Nxultra
                                ? spca505b_init_data
                                : spca505_init_data))
                return -EIO;
        return 0;
}

static void setbrightness(struct gspca_dev *gspca_dev, s32 brightness)
{
        reg_write(gspca_dev, 0x05, 0x00, (255 - brightness) >> 6);
        reg_write(gspca_dev, 0x05, 0x01, (255 - brightness) << 2);
}

static int sd_start(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int ret, mode;
        static u8 mode_tb[][3] = {
        /*        r00   r06   r07       */
                {0x00, 0x10, 0x10},     /* 640x480 */
                {0x01, 0x1a, 0x1a},     /* 352x288 */
                {0x02, 0x1c, 0x1d},     /* 320x240 */
                {0x04, 0x34, 0x34},     /* 176x144 */
                {0x05, 0x40, 0x40}      /* 160x120 */
        };

        if (sd->subtype == Nxultra)
                write_vector(gspca_dev, spca505b_open_data_ccd);
        else
                write_vector(gspca_dev, spca505_open_data_ccd);
        ret = reg_read(gspca_dev, 0x06, 0x16);

        if (ret < 0) {
                gspca_err(gspca_dev, "register read failed err: %d\n", ret);
                return ret;
        }
        if (ret != 0x0101) {
                pr_err("After vector read returns 0x%04x should be 0x0101\n",
                       ret);
        }

        ret = reg_write(gspca_dev, 0x06, 0x16, 0x0a);
        if (ret < 0)
                return ret;
        reg_write(gspca_dev, 0x05, 0xc2, 0x12);

        /* necessary because without it we can see stream
         * only once after loading module */
        /* stopping usb registers Tomasz change */
        reg_write(gspca_dev, 0x02, 0x00, 0x00);

        mode = gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv;
        reg_write(gspca_dev, SPCA50X_REG_COMPRESS, 0x00, mode_tb[mode][0]);
        reg_write(gspca_dev, SPCA50X_REG_COMPRESS, 0x06, mode_tb[mode][1]);
        reg_write(gspca_dev, SPCA50X_REG_COMPRESS, 0x07, mode_tb[mode][2]);

        return reg_write(gspca_dev, SPCA50X_REG_USB,
                         SPCA50X_USB_CTRL,
                         SPCA50X_CUSB_ENABLE);
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
        /* Disable ISO packet machine */
        reg_write(gspca_dev, 0x02, 0x00, 0x00);
}

/* called on streamoff with alt 0 and on disconnect */
static void sd_stop0(struct gspca_dev *gspca_dev)
{
        if (!gspca_dev->present)
                return;

        /* This maybe reset or power control */
        reg_write(gspca_dev, 0x03, 0x03, 0x20);
        reg_write(gspca_dev, 0x03, 0x01, 0x00);
        reg_write(gspca_dev, 0x03, 0x00, 0x01);
        reg_write(gspca_dev, 0x05, 0x10, 0x01);
        reg_write(gspca_dev, 0x05, 0x11, 0x0f);
}

static void sd_pkt_scan(struct gspca_dev *gspca_dev,
                        u8 *data,                       /* isoc packet */
                        int len)                        /* iso packet length */
{
        switch (data[0]) {
        case 0:                         /* start of frame */
                gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
                data += SPCA50X_OFFSET_DATA;
                len -= SPCA50X_OFFSET_DATA;
                gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
                break;
        case 0xff:                      /* drop */
                break;
        default:
                data += 1;
                len -= 1;
                gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
                break;
        }
}

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

        gspca_dev->usb_err = 0;

        if (!gspca_dev->streaming)
                return 0;

        switch (ctrl->id) {
        case V4L2_CID_BRIGHTNESS:
                setbrightness(gspca_dev, ctrl->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;

        gspca_dev->vdev.ctrl_handler = hdl;
        v4l2_ctrl_handler_init(hdl, 5);
        v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_BRIGHTNESS, 0, 255, 1, 127);

        if (hdl->error) {
                pr_err("Could not initialize controls\n");
                return hdl->error;
        }
        return 0;
}

/* sub-driver description */
static const struct sd_desc sd_desc = {
        .name = MODULE_NAME,
        .config = sd_config,
        .init_controls = sd_init_controls,
        .init = sd_init,
        .start = sd_start,
        .stopN = sd_stopN,
        .stop0 = sd_stop0,
        .pkt_scan = sd_pkt_scan,
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
        {USB_DEVICE(0x041e, 0x401d), .driver_info = Nxultra},
        {USB_DEVICE(0x0733, 0x0430), .driver_info = IntelPCCameraPro},
/*fixme: may be UsbGrabberPV321 BRIDGE_SPCA506 SENSOR_SAA7113 */
        {}
};
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);