// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * SN9C2028 library
 *
 * Copyright (C) 2009 Theodore Kilgore <kilgota@auburn.edu>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define MODULE_NAME "sn9c2028"

#include "gspca.h"

MODULE_AUTHOR("Theodore Kilgore");
MODULE_DESCRIPTION("Sonix SN9C2028 USB Camera Driver");
MODULE_LICENSE("GPL");

/* specific webcam descriptor */
struct sd {
        struct gspca_dev gspca_dev;  /* !! must be the first item */
        u8 sof_read;
        u16 model;

#define MIN_AVG_LUM 8500
#define MAX_AVG_LUM 10000
        int avg_lum;
        u8 avg_lum_l;

        struct { /* autogain and gain control cluster */
                struct v4l2_ctrl *autogain;
                struct v4l2_ctrl *gain;
        };
};

struct init_command {
        unsigned char instruction[6];
        unsigned char to_read; /* length to read. 0 means no reply requested */
};

/* How to change the resolution of any of the VGA cams is unknown */
static const struct v4l2_pix_format vga_mode[] = {
        {640, 480, V4L2_PIX_FMT_SN9C2028, V4L2_FIELD_NONE,
                .bytesperline = 640,
                .sizeimage = 640 * 480 * 3 / 4,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 0},
};

/* No way to change the resolution of the CIF cams is known */
static const struct v4l2_pix_format cif_mode[] = {
        {352, 288, V4L2_PIX_FMT_SN9C2028, V4L2_FIELD_NONE,
                .bytesperline = 352,
                .sizeimage = 352 * 288 * 3 / 4,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 0},
};

/* the bytes to write are in gspca_dev->usb_buf */
static int sn9c2028_command(struct gspca_dev *gspca_dev, u8 *command)
{
        int rc;

        gspca_dbg(gspca_dev, D_USBO, "sending command %02x%02x%02x%02x%02x%02x\n",
                  command[0], command[1], command[2],
                  command[3], command[4], command[5]);

        memcpy(gspca_dev->usb_buf, command, 6);
        rc = usb_control_msg(gspca_dev->dev,
                        usb_sndctrlpipe(gspca_dev->dev, 0),
                        USB_REQ_GET_CONFIGURATION,
                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
                        2, 0, gspca_dev->usb_buf, 6, 500);
        if (rc < 0) {
                pr_err("command write [%02x] error %d\n",
                       gspca_dev->usb_buf[0], rc);
                return rc;
        }

        return 0;
}

static int sn9c2028_read1(struct gspca_dev *gspca_dev)
{
        int rc;

        rc = usb_control_msg(gspca_dev->dev,
                        usb_rcvctrlpipe(gspca_dev->dev, 0),
                        USB_REQ_GET_STATUS,
                        USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
                        1, 0, gspca_dev->usb_buf, 1, 500);
        if (rc != 1) {
                pr_err("read1 error %d\n", rc);
                return (rc < 0) ? rc : -EIO;
        }
        gspca_dbg(gspca_dev, D_USBI, "read1 response %02x\n",
                  gspca_dev->usb_buf[0]);
        return gspca_dev->usb_buf[0];
}

static int sn9c2028_read4(struct gspca_dev *gspca_dev, u8 *reading)
{
        int rc;
        rc = usb_control_msg(gspca_dev->dev,
                        usb_rcvctrlpipe(gspca_dev->dev, 0),
                        USB_REQ_GET_STATUS,
                        USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
                        4, 0, gspca_dev->usb_buf, 4, 500);
        if (rc != 4) {
                pr_err("read4 error %d\n", rc);
                return (rc < 0) ? rc : -EIO;
        }
        memcpy(reading, gspca_dev->usb_buf, 4);
        gspca_dbg(gspca_dev, D_USBI, "read4 response %02x%02x%02x%02x\n",
                  reading[0], reading[1], reading[2], reading[3]);
        return rc;
}

static int sn9c2028_long_command(struct gspca_dev *gspca_dev, u8 *command)
{
        int i, status;
        __u8 reading[4];

        status = sn9c2028_command(gspca_dev, command);
        if (status < 0)
                return status;

        status = -1;
        for (i = 0; i < 256 && status < 2; i++)
                status = sn9c2028_read1(gspca_dev);
        if (status < 0) {
                pr_err("long command status read error %d\n", status);
                return status;
        }

        memset(reading, 0, 4);
        status = sn9c2028_read4(gspca_dev, reading);
        if (status < 0)
                return status;

        /* in general, the first byte of the response is the first byte of
         * the command, or'ed with 8 */
        status = sn9c2028_read1(gspca_dev);
        if (status < 0)
                return status;

        return 0;
}

static int sn9c2028_short_command(struct gspca_dev *gspca_dev, u8 *command)
{
        int err_code;

        err_code = sn9c2028_command(gspca_dev, command);
        if (err_code < 0)
                return err_code;

        err_code = sn9c2028_read1(gspca_dev);
        if (err_code < 0)
                return err_code;

        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 = &gspca_dev->cam;

        gspca_dbg(gspca_dev, D_PROBE, "SN9C2028 camera detected (vid/pid 0x%04X:0x%04X)\n",
                  id->idVendor, id->idProduct);

        sd->model = id->idProduct;

        switch (sd->model) {
        case 0x7005:
                gspca_dbg(gspca_dev, D_PROBE, "Genius Smart 300 camera\n");
                break;
        case 0x7003:
                gspca_dbg(gspca_dev, D_PROBE, "Genius Videocam Live v2\n");
                break;
        case 0x8000:
                gspca_dbg(gspca_dev, D_PROBE, "DC31VC\n");
                break;
        case 0x8001:
                gspca_dbg(gspca_dev, D_PROBE, "Spy camera\n");
                break;
        case 0x8003:
                gspca_dbg(gspca_dev, D_PROBE, "CIF camera\n");
                break;
        case 0x8008:
                gspca_dbg(gspca_dev, D_PROBE, "Mini-Shotz ms-350 camera\n");
                break;
        case 0x800a:
                gspca_dbg(gspca_dev, D_PROBE, "Vivitar 3350b type camera\n");
                cam->input_flags = V4L2_IN_ST_VFLIP | V4L2_IN_ST_HFLIP;
                break;
        }

        switch (sd->model) {
        case 0x8000:
        case 0x8001:
        case 0x8003:
                cam->cam_mode = cif_mode;
                cam->nmodes = ARRAY_SIZE(cif_mode);
                break;
        default:
                cam->cam_mode = vga_mode;
                cam->nmodes = ARRAY_SIZE(vga_mode);
        }
        return 0;
}

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

        sn9c2028_read1(gspca_dev);
        sn9c2028_read1(gspca_dev);
        status = sn9c2028_read1(gspca_dev);

        return (status < 0) ? status : 0;
}

static int run_start_commands(struct gspca_dev *gspca_dev,
                              struct init_command *cam_commands, int n)
{
        int i, err_code = -1;

        for (i = 0; i < n; i++) {
                switch (cam_commands[i].to_read) {
                case 4:
                        err_code = sn9c2028_long_command(gspca_dev,
                                        cam_commands[i].instruction);
                        break;
                case 1:
                        err_code = sn9c2028_short_command(gspca_dev,
                                        cam_commands[i].instruction);
                        break;
                case 0:
                        err_code = sn9c2028_command(gspca_dev,
                                        cam_commands[i].instruction);
                        break;
                }
                if (err_code < 0)
                        return err_code;
        }
        return 0;
}

static void set_gain(struct gspca_dev *gspca_dev, s32 g)
{
        struct sd *sd = (struct sd *) gspca_dev;

        struct init_command genius_vcam_live_gain_cmds[] = {
                {{0x1d, 0x25, 0x10 /* This byte is gain */,
                  0x20, 0xab, 0x00}, 0},
        };
        if (!gspca_dev->streaming)
                return;

        switch (sd->model) {
        case 0x7003:
                genius_vcam_live_gain_cmds[0].instruction[2] = g;
                run_start_commands(gspca_dev, genius_vcam_live_gain_cmds,
                                   ARRAY_SIZE(genius_vcam_live_gain_cmds));
                break;
        default:
                break;
        }
}

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) {
        /* standalone gain control */
        case V4L2_CID_GAIN:
                set_gain(gspca_dev, ctrl->val);
                break;
        /* autogain */
        case V4L2_CID_AUTOGAIN:
                set_gain(gspca_dev, 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);

        switch (sd->model) {
        case 0x7003:
                sd->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_GAIN, 0, 20, 1, 0);
                sd->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
                break;
        default:
                break;
        }

        return 0;
}
static int start_spy_cam(struct gspca_dev *gspca_dev)
{
        struct init_command spy_start_commands[] = {
                {{0x0c, 0x01, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x20, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x21, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x22, 0x01, 0x04, 0x00, 0x00}, 4},
                {{0x13, 0x23, 0x01, 0x03, 0x00, 0x00}, 4},
                {{0x13, 0x24, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x16, 0x00, 0x00}, 4}, /* width  352 */
                {{0x13, 0x26, 0x01, 0x12, 0x00, 0x00}, 4}, /* height 288 */
                /* {{0x13, 0x27, 0x01, 0x28, 0x00, 0x00}, 4}, */
                {{0x13, 0x27, 0x01, 0x68, 0x00, 0x00}, 4},
                {{0x13, 0x28, 0x01, 0x09, 0x00, 0x00}, 4}, /* red gain ?*/
                /* {{0x13, 0x28, 0x01, 0x00, 0x00, 0x00}, 4}, */
                {{0x13, 0x29, 0x01, 0x00, 0x00, 0x00}, 4},
                /* {{0x13, 0x29, 0x01, 0x0c, 0x00, 0x00}, 4}, */
                {{0x13, 0x2a, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2b, 0x01, 0x00, 0x00, 0x00}, 4},
                /* {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4}, */
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x02, 0x00, 0x00}, 4},
                /* {{0x13, 0x2e, 0x01, 0x09, 0x00, 0x00}, 4}, */
                {{0x13, 0x2e, 0x01, 0x09, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x07, 0x00, 0x00}, 4},
                {{0x12, 0x34, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x34, 0x01, 0xa1, 0x00, 0x00}, 4},
                {{0x13, 0x35, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x02, 0x06, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x03, 0x13, 0x00, 0x00, 0x00}, 4}, /*don't mess with*/
                /*{{0x11, 0x04, 0x06, 0x00, 0x00, 0x00}, 4}, observed */
                {{0x11, 0x04, 0x00, 0x00, 0x00, 0x00}, 4}, /* brighter */
                /*{{0x11, 0x05, 0x65, 0x00, 0x00, 0x00}, 4}, observed */
                {{0x11, 0x05, 0x00, 0x00, 0x00, 0x00}, 4}, /* brighter */
                {{0x11, 0x06, 0xb1, 0x00, 0x00, 0x00}, 4}, /* observed */
                {{0x11, 0x07, 0x00, 0x00, 0x00, 0x00}, 4},
                /*{{0x11, 0x08, 0x06, 0x00, 0x00, 0x00}, 4}, observed */
                {{0x11, 0x08, 0x0b, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x09, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0a, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0b, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0c, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0d, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0e, 0x04, 0x00, 0x00, 0x00}, 4},
                /* {{0x11, 0x0f, 0x00, 0x00, 0x00, 0x00}, 4}, */
                /* brightness or gain. 0 is default. 4 is good
                 * indoors at night with incandescent lighting */
                {{0x11, 0x0f, 0x04, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x10, 0x06, 0x00, 0x00, 0x00}, 4}, /*hstart or hoffs*/
                {{0x11, 0x11, 0x06, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x12, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x14, 0x02, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x13, 0x01, 0x00, 0x00, 0x00}, 4},
                /* {{0x1b, 0x02, 0x06, 0x00, 0x00, 0x00}, 1}, observed */
                {{0x1b, 0x02, 0x11, 0x00, 0x00, 0x00}, 1}, /* brighter */
                /* {{0x1b, 0x13, 0x01, 0x00, 0x00, 0x00}, 1}, observed */
                {{0x1b, 0x13, 0x11, 0x00, 0x00, 0x00}, 1},
                {{0x20, 0x34, 0xa1, 0x00, 0x00, 0x00}, 1}, /* compresses */
                /* Camera should start to capture now. */
        };

        return run_start_commands(gspca_dev, spy_start_commands,
                                  ARRAY_SIZE(spy_start_commands));
}

static int start_cif_cam(struct gspca_dev *gspca_dev)
{
        struct init_command cif_start_commands[] = {
                {{0x0c, 0x01, 0x00, 0x00, 0x00, 0x00}, 4},
                /* The entire sequence below seems redundant */
                /* {{0x13, 0x20, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x21, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x22, 0x01, 0x06, 0x00, 0x00}, 4},
                {{0x13, 0x23, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x24, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x16, 0x00, 0x00}, 4}, width?
                {{0x13, 0x26, 0x01, 0x12, 0x00, 0x00}, 4}, height?
                {{0x13, 0x27, 0x01, 0x68, 0x00, 0x00}, 4}, subsample?
                {{0x13, 0x28, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x29, 0x01, 0x20, 0x00, 0x00}, 4},
                {{0x13, 0x2a, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2b, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x03, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x0f, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x0c, 0x00, 0x00}, 4},
                {{0x12, 0x34, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x34, 0x01, 0xa1, 0x00, 0x00}, 4},
                {{0x13, 0x35, 0x01, 0x00, 0x00, 0x00}, 4},*/
                {{0x1b, 0x21, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x17, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x19, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x02, 0x06, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x03, 0x5a, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x04, 0x27, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x05, 0x01, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x12, 0x14, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x13, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x14, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x15, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x16, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x77, 0xa2, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x06, 0x0f, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x07, 0x14, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x08, 0x0f, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x09, 0x10, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x0e, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x0f, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x12, 0x07, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x10, 0x1f, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x11, 0x01, 0x00, 0x00, 0x00}, 1},
                {{0x13, 0x25, 0x01, 0x16, 0x00, 0x00}, 1}, /* width/8 */
                {{0x13, 0x26, 0x01, 0x12, 0x00, 0x00}, 1}, /* height/8 */
                /* {{0x13, 0x27, 0x01, 0x68, 0x00, 0x00}, 4}, subsample?
                 * {{0x13, 0x28, 0x01, 0x1e, 0x00, 0x00}, 4}, does nothing
                 * {{0x13, 0x27, 0x01, 0x20, 0x00, 0x00}, 4}, */
                /* {{0x13, 0x29, 0x01, 0x22, 0x00, 0x00}, 4},
                 * causes subsampling
                 * but not a change in the resolution setting! */
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x01, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x08, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x06, 0x00, 0x00}, 4},
                {{0x13, 0x28, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x1b, 0x04, 0x6d, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x05, 0x03, 0x00, 0x00, 0x00}, 1},
                {{0x20, 0x36, 0x06, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x0e, 0x01, 0x00, 0x00, 0x00}, 1},
                {{0x12, 0x27, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x1b, 0x0f, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x20, 0x36, 0x05, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x10, 0x0f, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x02, 0x06, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x11, 0x01, 0x00, 0x00, 0x00}, 1},
                {{0x20, 0x34, 0xa1, 0x00, 0x00, 0x00}, 1},/* use compression */
                /* Camera should start to capture now. */
        };

        return run_start_commands(gspca_dev, cif_start_commands,
                                  ARRAY_SIZE(cif_start_commands));
}

static int start_ms350_cam(struct gspca_dev *gspca_dev)
{
        struct init_command ms350_start_commands[] = {
                {{0x0c, 0x01, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x16, 0x01, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x20, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x21, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x22, 0x01, 0x04, 0x00, 0x00}, 4},
                {{0x13, 0x23, 0x01, 0x03, 0x00, 0x00}, 4},
                {{0x13, 0x24, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x16, 0x00, 0x00}, 4},
                {{0x13, 0x26, 0x01, 0x12, 0x00, 0x00}, 4},
                {{0x13, 0x27, 0x01, 0x28, 0x00, 0x00}, 4},
                {{0x13, 0x28, 0x01, 0x09, 0x00, 0x00}, 4},
                {{0x13, 0x29, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2a, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2b, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x03, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x0f, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x0c, 0x00, 0x00}, 4},
                {{0x12, 0x34, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x34, 0x01, 0xa1, 0x00, 0x00}, 4},
                {{0x13, 0x35, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x00, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x01, 0x70, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x02, 0x05, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x03, 0x5d, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x04, 0x07, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x05, 0x25, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x06, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x07, 0x09, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x08, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x09, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0a, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0b, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0c, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0d, 0x0c, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0e, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x0f, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x10, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x11, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x12, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x13, 0x63, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x15, 0x70, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x18, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x11, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x28, 0x00, 0x00}, 4}, /* width  */
                {{0x13, 0x26, 0x01, 0x1e, 0x00, 0x00}, 4}, /* height */
                {{0x13, 0x28, 0x01, 0x09, 0x00, 0x00}, 4}, /* vstart? */
                {{0x13, 0x27, 0x01, 0x28, 0x00, 0x00}, 4},
                {{0x13, 0x29, 0x01, 0x40, 0x00, 0x00}, 4}, /* hstart? */
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x03, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x0f, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x0c, 0x00, 0x00}, 4},
                {{0x1b, 0x02, 0x05, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x11, 0x01, 0x00, 0x00, 0x00}, 1},
                {{0x20, 0x18, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x02, 0x0a, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x11, 0x01, 0x00, 0x00, 0x00}, 0},
                /* Camera should start to capture now. */
        };

        return run_start_commands(gspca_dev, ms350_start_commands,
                                  ARRAY_SIZE(ms350_start_commands));
}

static int start_genius_cam(struct gspca_dev *gspca_dev)
{
        struct init_command genius_start_commands[] = {
                {{0x0c, 0x01, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x16, 0x01, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x10, 0x00, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x16, 0x00, 0x00}, 4},
                {{0x13, 0x26, 0x01, 0x12, 0x00, 0x00}, 4},
                /* "preliminary" width and height settings */
                {{0x13, 0x28, 0x01, 0x0e, 0x00, 0x00}, 4},
                {{0x13, 0x27, 0x01, 0x20, 0x00, 0x00}, 4},
                {{0x13, 0x29, 0x01, 0x22, 0x00, 0x00}, 4},
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x09, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x07, 0x00, 0x00}, 4},
                {{0x11, 0x20, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x21, 0x2d, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x22, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x23, 0x03, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x10, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x11, 0x64, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x12, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x13, 0x91, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x14, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x15, 0x20, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x16, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x17, 0x60, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x20, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x21, 0x2d, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x22, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x23, 0x03, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x25, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x26, 0x02, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x27, 0x88, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x30, 0x38, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x31, 0x2a, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x32, 0x2a, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x33, 0x2a, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x34, 0x02, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x5b, 0x0a, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x28, 0x00, 0x00}, 4}, /* real width */
                {{0x13, 0x26, 0x01, 0x1e, 0x00, 0x00}, 4}, /* real height */
                {{0x13, 0x28, 0x01, 0x0e, 0x00, 0x00}, 4},
                {{0x13, 0x27, 0x01, 0x20, 0x00, 0x00}, 4},
                {{0x13, 0x29, 0x01, 0x62, 0x00, 0x00}, 4},
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x03, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x0f, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x0c, 0x00, 0x00}, 4},
                {{0x11, 0x20, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x21, 0x2a, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x22, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x23, 0x28, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x10, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x11, 0x04, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x12, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x13, 0x03, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x14, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x15, 0xe0, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x16, 0x02, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x17, 0x80, 0x00, 0x00, 0x00}, 4},
                {{0x1c, 0x20, 0x00, 0x2a, 0x00, 0x00}, 1},
                {{0x1c, 0x20, 0x00, 0x2a, 0x00, 0x00}, 1},
                {{0x20, 0x34, 0xa1, 0x00, 0x00, 0x00}, 0}
                /* Camera should start to capture now. */
        };

        return run_start_commands(gspca_dev, genius_start_commands,
                                  ARRAY_SIZE(genius_start_commands));
}

static int start_genius_videocam_live(struct gspca_dev *gspca_dev)
{
        int r;
        struct sd *sd = (struct sd *) gspca_dev;
        struct init_command genius_vcam_live_start_commands[] = {
                {{0x0c, 0x01, 0x00, 0x00, 0x00, 0x00}, 0},
                {{0x16, 0x01, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x10, 0x00, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x16, 0x00, 0x00}, 4},
                {{0x13, 0x26, 0x01, 0x12, 0x00, 0x00}, 4},

                {{0x13, 0x28, 0x01, 0x0e, 0x00, 0x00}, 4},
                {{0x13, 0x27, 0x01, 0x20, 0x00, 0x00}, 4},
                {{0x13, 0x29, 0x01, 0x22, 0x00, 0x00}, 4},
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x09, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x07, 0x00, 0x00}, 4},
                {{0x11, 0x20, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x21, 0x2d, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x22, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x23, 0x03, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x10, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x11, 0x64, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x12, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x13, 0x91, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x14, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x15, 0x20, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x16, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x17, 0x60, 0x00, 0x00, 0x00}, 4},
                {{0x1c, 0x20, 0x00, 0x2d, 0x00, 0x00}, 4},
                {{0x13, 0x20, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x21, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x22, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x23, 0x01, 0x01, 0x00, 0x00}, 4},
                {{0x13, 0x24, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x16, 0x00, 0x00}, 4},
                {{0x13, 0x26, 0x01, 0x12, 0x00, 0x00}, 4},
                {{0x13, 0x27, 0x01, 0x20, 0x00, 0x00}, 4},
                {{0x13, 0x28, 0x01, 0x0e, 0x00, 0x00}, 4},
                {{0x13, 0x29, 0x01, 0x22, 0x00, 0x00}, 4},
                {{0x13, 0x2a, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2b, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x09, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x07, 0x00, 0x00}, 4},
                {{0x12, 0x34, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x34, 0x01, 0xa1, 0x00, 0x00}, 4},
                {{0x13, 0x35, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x01, 0x04, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x02, 0x92, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x10, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x11, 0x64, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x12, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x13, 0x91, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x14, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x15, 0x20, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x16, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x17, 0x60, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x20, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x21, 0x2d, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x22, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x23, 0x03, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x25, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x26, 0x02, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x27, 0x88, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x30, 0x38, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x31, 0x2a, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x32, 0x2a, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x33, 0x2a, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x34, 0x02, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x5b, 0x0a, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x28, 0x00, 0x00}, 4},
                {{0x13, 0x26, 0x01, 0x1e, 0x00, 0x00}, 4},
                {{0x13, 0x28, 0x01, 0x0e, 0x00, 0x00}, 4},
                {{0x13, 0x27, 0x01, 0x20, 0x00, 0x00}, 4},
                {{0x13, 0x29, 0x01, 0x62, 0x00, 0x00}, 4},
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x03, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x0f, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x0c, 0x00, 0x00}, 4},
                {{0x11, 0x20, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x21, 0x2a, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x22, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x23, 0x28, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x10, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x11, 0x04, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x12, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x13, 0x03, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x14, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x15, 0xe0, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x16, 0x02, 0x00, 0x00, 0x00}, 4},
                {{0x11, 0x17, 0x80, 0x00, 0x00, 0x00}, 4},
                {{0x1c, 0x20, 0x00, 0x2a, 0x00, 0x00}, 1},
                {{0x20, 0x34, 0xa1, 0x00, 0x00, 0x00}, 0},
                /* Camera should start to capture now. */
                {{0x12, 0x27, 0x01, 0x00, 0x00, 0x00}, 0},
                {{0x1b, 0x32, 0x26, 0x00, 0x00, 0x00}, 0},
                {{0x1d, 0x25, 0x10, 0x20, 0xab, 0x00}, 0},
        };

        r = run_start_commands(gspca_dev, genius_vcam_live_start_commands,
                                  ARRAY_SIZE(genius_vcam_live_start_commands));
        if (r < 0)
                return r;

        if (sd->gain)
                set_gain(gspca_dev, v4l2_ctrl_g_ctrl(sd->gain));

        return r;
}

static int start_vivitar_cam(struct gspca_dev *gspca_dev)
{
        struct init_command vivitar_start_commands[] = {
                {{0x0c, 0x01, 0x00, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x20, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x21, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x22, 0x01, 0x01, 0x00, 0x00}, 4},
                {{0x13, 0x23, 0x01, 0x01, 0x00, 0x00}, 4},
                {{0x13, 0x24, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x25, 0x01, 0x28, 0x00, 0x00}, 4},
                {{0x13, 0x26, 0x01, 0x1e, 0x00, 0x00}, 4},
                {{0x13, 0x27, 0x01, 0x20, 0x00, 0x00}, 4},
                {{0x13, 0x28, 0x01, 0x0a, 0x00, 0x00}, 4},
                /*
                 * Above is changed from OEM 0x0b. Fixes Bayer tiling.
                 * Presumably gives a vertical shift of one row.
                 */
                {{0x13, 0x29, 0x01, 0x20, 0x00, 0x00}, 4},
                /* Above seems to do horizontal shift. */
                {{0x13, 0x2a, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2b, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x2c, 0x01, 0x02, 0x00, 0x00}, 4},
                {{0x13, 0x2d, 0x01, 0x03, 0x00, 0x00}, 4},
                {{0x13, 0x2e, 0x01, 0x0f, 0x00, 0x00}, 4},
                {{0x13, 0x2f, 0x01, 0x0c, 0x00, 0x00}, 4},
                /* Above three commands seem to relate to brightness. */
                {{0x12, 0x34, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x13, 0x34, 0x01, 0xa1, 0x00, 0x00}, 4},
                {{0x13, 0x35, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x1b, 0x12, 0x80, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x01, 0x77, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x02, 0x3a, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x12, 0x78, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x13, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x14, 0x80, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x15, 0x34, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x1b, 0x04, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x20, 0x44, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x23, 0xee, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x26, 0xa0, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x27, 0x9a, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x28, 0xa0, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x29, 0x30, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x2a, 0x80, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x2b, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x2f, 0x3d, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x30, 0x24, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x32, 0x86, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x60, 0xa9, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x61, 0x42, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x65, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x69, 0x38, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x6f, 0x88, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x70, 0x0b, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x71, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x74, 0x21, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x75, 0x86, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x76, 0x00, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x7d, 0xf3, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x17, 0x1c, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x18, 0xc0, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x19, 0x05, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x1a, 0xf6, 0x00, 0x00, 0x00}, 1},
                /* {{0x13, 0x25, 0x01, 0x28, 0x00, 0x00}, 4},
                {{0x13, 0x26, 0x01, 0x1e, 0x00, 0x00}, 4},
                {{0x13, 0x28, 0x01, 0x0b, 0x00, 0x00}, 4}, */
                {{0x20, 0x36, 0x06, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x10, 0x26, 0x00, 0x00, 0x00}, 1},
                {{0x12, 0x27, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x1b, 0x76, 0x03, 0x00, 0x00, 0x00}, 1},
                {{0x20, 0x36, 0x05, 0x00, 0x00, 0x00}, 1},
                {{0x1b, 0x00, 0x3f, 0x00, 0x00, 0x00}, 1},
                /* Above is brightness; OEM driver setting is 0x10 */
                {{0x12, 0x27, 0x01, 0x00, 0x00, 0x00}, 4},
                {{0x20, 0x29, 0x30, 0x00, 0x00, 0x00}, 1},
                {{0x20, 0x34, 0xa1, 0x00, 0x00, 0x00}, 1}
        };

        return run_start_commands(gspca_dev, vivitar_start_commands,
                                  ARRAY_SIZE(vivitar_start_commands));
}

static int sd_start(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int err_code;

        sd->sof_read = 0;

        switch (sd->model) {
        case 0x7005:
                err_code = start_genius_cam(gspca_dev);
                break;
        case 0x7003:
                err_code = start_genius_videocam_live(gspca_dev);
                break;
        case 0x8001:
                err_code = start_spy_cam(gspca_dev);
                break;
        case 0x8003:
                err_code = start_cif_cam(gspca_dev);
                break;
        case 0x8008:
                err_code = start_ms350_cam(gspca_dev);
                break;
        case 0x800a:
                err_code = start_vivitar_cam(gspca_dev);
                break;
        default:
                pr_err("Starting unknown camera, please report this\n");
                return -ENXIO;
        }

        sd->avg_lum = -1;

        return err_code;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
        int result;
        __u8 data[6];

        result = sn9c2028_read1(gspca_dev);
        if (result < 0)
                gspca_err(gspca_dev, "Camera Stop read failed\n");

        memset(data, 0, 6);
        data[0] = 0x14;
        result = sn9c2028_command(gspca_dev, data);
        if (result < 0)
                gspca_err(gspca_dev, "Camera Stop command failed\n");
}

static void do_autogain(struct gspca_dev *gspca_dev, int avg_lum)
{
        struct sd *sd = (struct sd *) gspca_dev;
        s32 cur_gain = v4l2_ctrl_g_ctrl(sd->gain);

        if (avg_lum == -1)
                return;

        if (avg_lum < MIN_AVG_LUM) {
                if (cur_gain == sd->gain->maximum)
                        return;
                cur_gain++;
                v4l2_ctrl_s_ctrl(sd->gain, cur_gain);
        }
        if (avg_lum > MAX_AVG_LUM) {
                if (cur_gain == sd->gain->minimum)
                        return;
                cur_gain--;
                v4l2_ctrl_s_ctrl(sd->gain, cur_gain);
        }

}

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

        if (sd->autogain == NULL || !v4l2_ctrl_g_ctrl(sd->autogain))
                return;

        do_autogain(gspca_dev, sd->avg_lum);
}

/* Include sn9c2028 sof detection functions */
#include "sn9c2028.h"

static void sd_pkt_scan(struct gspca_dev *gspca_dev,
                        __u8 *data,                     /* isoc packet */
                        int len)                        /* iso packet length */
{
        unsigned char *sof;

        sof = sn9c2028_find_sof(gspca_dev, data, len);
        if (sof) {
                int n;

                /* finish decoding current frame */
                n = sof - data;
                if (n > sizeof sn9c2028_sof_marker)
                        n -= sizeof sn9c2028_sof_marker;
                else
                        n = 0;
                gspca_frame_add(gspca_dev, LAST_PACKET, data, n);
                /* Start next frame. */
                gspca_frame_add(gspca_dev, FIRST_PACKET,
                        sn9c2028_sof_marker, sizeof sn9c2028_sof_marker);
                len -= sof - data;
                data = sof;
        }
        gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}

/* 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,
        .dq_callback = sd_dqcallback,
        .pkt_scan = sd_pkt_scan,
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
        {USB_DEVICE(0x0458, 0x7005)}, /* Genius Smart 300, version 2 */
        {USB_DEVICE(0x0458, 0x7003)}, /* Genius Videocam Live v2  */
        /* The Genius Smart is untested. I can't find an owner ! */
        /* {USB_DEVICE(0x0c45, 0x8000)}, DC31VC, Don't know this camera */
        {USB_DEVICE(0x0c45, 0x8001)}, /* Wild Planet digital spy cam */
        {USB_DEVICE(0x0c45, 0x8003)}, /* Several small CIF cameras */
        /* {USB_DEVICE(0x0c45, 0x8006)}, Unknown VGA camera */
        {USB_DEVICE(0x0c45, 0x8008)}, /* Mini-Shotz ms-350 */
        {USB_DEVICE(0x0c45, 0x800a)}, /* Vivicam 3350B */
        {}
};
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);