/*
 *              Sunplus spca504(abc) spca533 spca536 library
 *              Copyright (C) 2005 Michel Xhaard mxhaard@magic.fr
 *
 * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
 *
 * 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 "sunplus"

#include "gspca.h"
#include "jpeg.h"

MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
MODULE_DESCRIPTION("GSPCA/SPCA5xx USB Camera Driver");
MODULE_LICENSE("GPL");

#define QUALITY 85

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

        bool autogain;

        u8 bridge;
#define BRIDGE_SPCA504 0
#define BRIDGE_SPCA504B 1
#define BRIDGE_SPCA504C 2
#define BRIDGE_SPCA533 3
#define BRIDGE_SPCA536 4
        u8 subtype;
#define AiptekMiniPenCam13 1
#define LogitechClickSmart420 2
#define LogitechClickSmart820 3
#define MegapixV4 4
#define MegaImageVI 5

        u8 jpeg_hdr[JPEG_HDR_SZ];
};

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

static const struct v4l2_pix_format custom_mode[] = {
        {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
                .bytesperline = 320,
                .sizeimage = 320 * 240 * 3 / 8 + 590,
                .colorspace = V4L2_COLORSPACE_JPEG,
                .priv = 2},
        {464, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
                .bytesperline = 464,
                .sizeimage = 464 * 480 * 3 / 8 + 590,
                .colorspace = V4L2_COLORSPACE_JPEG,
                .priv = 1},
};

static const struct v4l2_pix_format vga_mode2[] = {
        {176, 144, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
                .bytesperline = 176,
                .sizeimage = 176 * 144 * 3 / 8 + 590,
                .colorspace = V4L2_COLORSPACE_JPEG,
                .priv = 4},
        {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
                .bytesperline = 320,
                .sizeimage = 320 * 240 * 3 / 8 + 590,
                .colorspace = V4L2_COLORSPACE_JPEG,
                .priv = 3},
        {352, 288, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
                .bytesperline = 352,
                .sizeimage = 352 * 288 * 3 / 8 + 590,
                .colorspace = V4L2_COLORSPACE_JPEG,
                .priv = 2},
        {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
                .bytesperline = 640,
                .sizeimage = 640 * 480 * 3 / 8 + 590,
                .colorspace = V4L2_COLORSPACE_JPEG,
                .priv = 1},
};

#define SPCA50X_OFFSET_DATA 10
#define SPCA504_PCCAM600_OFFSET_SNAPSHOT 3
#define SPCA504_PCCAM600_OFFSET_COMPRESS 4
#define SPCA504_PCCAM600_OFFSET_MODE     5
#define SPCA504_PCCAM600_OFFSET_DATA     14
 /* Frame packet header offsets for the spca533 */
#define SPCA533_OFFSET_DATA     16
#define SPCA533_OFFSET_FRAMSEQ  15
/* Frame packet header offsets for the spca536 */
#define SPCA536_OFFSET_DATA     4
#define SPCA536_OFFSET_FRAMSEQ  1

struct cmd {
        u8 req;
        u16 val;
        u16 idx;
};

/* Initialisation data for the Creative PC-CAM 600 */
static const struct cmd spca504_pccam600_init_data[] = {
/*      {0xa0, 0x0000, 0x0503},  * capture mode */
        {0x00, 0x0000, 0x2000},
        {0x00, 0x0013, 0x2301},
        {0x00, 0x0003, 0x2000},
        {0x00, 0x0001, 0x21ac},
        {0x00, 0x0001, 0x21a6},
        {0x00, 0x0000, 0x21a7}, /* brightness */
        {0x00, 0x0020, 0x21a8}, /* contrast */
        {0x00, 0x0001, 0x21ac}, /* sat/hue */
        {0x00, 0x0000, 0x21ad}, /* hue */
        {0x00, 0x001a, 0x21ae}, /* saturation */
        {0x00, 0x0002, 0x21a3}, /* gamma */
        {0x30, 0x0154, 0x0008},
        {0x30, 0x0004, 0x0006},
        {0x30, 0x0258, 0x0009},
        {0x30, 0x0004, 0x0000},
        {0x30, 0x0093, 0x0004},
        {0x30, 0x0066, 0x0005},
        {0x00, 0x0000, 0x2000},
        {0x00, 0x0013, 0x2301},
        {0x00, 0x0003, 0x2000},
        {0x00, 0x0013, 0x2301},
        {0x00, 0x0003, 0x2000},
};

/* Creative PC-CAM 600 specific open data, sent before using the
 * generic initialisation data from spca504_open_data.
 */
static const struct cmd spca504_pccam600_open_data[] = {
        {0x00, 0x0001, 0x2501},
        {0x20, 0x0500, 0x0001}, /* snapshot mode */
        {0x00, 0x0003, 0x2880},
        {0x00, 0x0001, 0x2881},
};

/* Initialisation data for the logitech clicksmart 420 */
static const struct cmd spca504A_clicksmart420_init_data[] = {
/*      {0xa0, 0x0000, 0x0503},  * capture mode */
        {0x00, 0x0000, 0x2000},
        {0x00, 0x0013, 0x2301},
        {0x00, 0x0003, 0x2000},
        {0x00, 0x0001, 0x21ac},
        {0x00, 0x0001, 0x21a6},
        {0x00, 0x0000, 0x21a7}, /* brightness */
        {0x00, 0x0020, 0x21a8}, /* contrast */
        {0x00, 0x0001, 0x21ac}, /* sat/hue */
        {0x00, 0x0000, 0x21ad}, /* hue */
        {0x00, 0x001a, 0x21ae}, /* saturation */
        {0x00, 0x0002, 0x21a3}, /* gamma */
        {0x30, 0x0004, 0x000a},
        {0xb0, 0x0001, 0x0000},

        {0xa1, 0x0080, 0x0001},
        {0x30, 0x0049, 0x0000},
        {0x30, 0x0060, 0x0005},
        {0x0c, 0x0004, 0x0000},
        {0x00, 0x0000, 0x0000},
        {0x00, 0x0000, 0x2000},
        {0x00, 0x0013, 0x2301},
        {0x00, 0x0003, 0x2000},
};

/* clicksmart 420 open data ? */
static const struct cmd spca504A_clicksmart420_open_data[] = {
        {0x00, 0x0001, 0x2501},
        {0x20, 0x0502, 0x0000},
        {0x06, 0x0000, 0x0000},
        {0x00, 0x0004, 0x2880},
        {0x00, 0x0001, 0x2881},

        {0xa0, 0x0000, 0x0503},
};

static const u8 qtable_creative_pccam[2][64] = {
        {                               /* Q-table Y-components */
         0x05, 0x03, 0x03, 0x05, 0x07, 0x0c, 0x0f, 0x12,
         0x04, 0x04, 0x04, 0x06, 0x08, 0x11, 0x12, 0x11,
         0x04, 0x04, 0x05, 0x07, 0x0c, 0x11, 0x15, 0x11,
         0x04, 0x05, 0x07, 0x09, 0x0f, 0x1a, 0x18, 0x13,
         0x05, 0x07, 0x0b, 0x11, 0x14, 0x21, 0x1f, 0x17,
         0x07, 0x0b, 0x11, 0x13, 0x18, 0x1f, 0x22, 0x1c,
         0x0f, 0x13, 0x17, 0x1a, 0x1f, 0x24, 0x24, 0x1e,
         0x16, 0x1c, 0x1d, 0x1d, 0x22, 0x1e, 0x1f, 0x1e},
        {                               /* Q-table C-components */
         0x05, 0x05, 0x07, 0x0e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x05, 0x06, 0x08, 0x14, 0x1e, 0x1e, 0x1e, 0x1e,
         0x07, 0x08, 0x11, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x0e, 0x14, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e}
};

/* FIXME: This Q-table is identical to the Creative PC-CAM one,
 *              except for one byte. Possibly a typo?
 *              NWG: 18/05/2003.
 */
static const u8 qtable_spca504_default[2][64] = {
        {                               /* Q-table Y-components */
         0x05, 0x03, 0x03, 0x05, 0x07, 0x0c, 0x0f, 0x12,
         0x04, 0x04, 0x04, 0x06, 0x08, 0x11, 0x12, 0x11,
         0x04, 0x04, 0x05, 0x07, 0x0c, 0x11, 0x15, 0x11,
         0x04, 0x05, 0x07, 0x09, 0x0f, 0x1a, 0x18, 0x13,
         0x05, 0x07, 0x0b, 0x11, 0x14, 0x21, 0x1f, 0x17,
         0x07, 0x0b, 0x11, 0x13, 0x18, 0x1f, 0x22, 0x1c,
         0x0f, 0x13, 0x17, 0x1a, 0x1f, 0x24, 0x24, 0x1e,
         0x16, 0x1c, 0x1d, 0x1d, 0x1d /* 0x22 */ , 0x1e, 0x1f, 0x1e,
         },
        {                               /* Q-table C-components */
         0x05, 0x05, 0x07, 0x0e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x05, 0x06, 0x08, 0x14, 0x1e, 0x1e, 0x1e, 0x1e,
         0x07, 0x08, 0x11, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x0e, 0x14, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e,
         0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e, 0x1e}
};

/* read <len> bytes to gspca_dev->usb_buf */
static void reg_r(struct gspca_dev *gspca_dev,
                  u8 req,
                  u16 index,
                  u16 len)
{
        int ret;

#ifdef GSPCA_DEBUG
        if (len > USB_BUF_SZ) {
                pr_err("reg_r: buffer overflow\n");
                return;
        }
#endif
        if (gspca_dev->usb_err < 0)
                return;
        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,
                        len ? gspca_dev->usb_buf : NULL, len,
                        500);
        if (ret < 0) {
                pr_err("reg_r err %d\n", ret);
                gspca_dev->usb_err = ret;
        }
}

/* write one byte */
static void reg_w_1(struct gspca_dev *gspca_dev,
                   u8 req,
                   u16 value,
                   u16 index,
                   u16 byte)
{
        int ret;

        if (gspca_dev->usb_err < 0)
                return;
        gspca_dev->usb_buf[0] = byte;
        ret = usb_control_msg(gspca_dev->dev,
                        usb_sndctrlpipe(gspca_dev->dev, 0),
                        req,
                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                        value, index,
                        gspca_dev->usb_buf, 1,
                        500);
        if (ret < 0) {
                pr_err("reg_w_1 err %d\n", ret);
                gspca_dev->usb_err = ret;
        }
}

/* write req / index / value */
static void reg_w_riv(struct gspca_dev *gspca_dev,
                     u8 req, u16 index, u16 value)
{
        struct usb_device *dev = gspca_dev->dev;
        int ret;

        if (gspca_dev->usb_err < 0)
                return;
        ret = usb_control_msg(dev,
                        usb_sndctrlpipe(dev, 0),
                        req,
                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                        value, index, NULL, 0, 500);
        if (ret < 0) {
                pr_err("reg_w_riv err %d\n", ret);
                gspca_dev->usb_err = ret;
                return;
        }
        PDEBUG(D_USBO, "reg_w_riv: 0x%02x,0x%04x:0x%04x",
                req, index, value);
}

static void write_vector(struct gspca_dev *gspca_dev,
                        const struct cmd *data, int ncmds)
{
        while (--ncmds >= 0) {
                reg_w_riv(gspca_dev, data->req, data->idx, data->val);
                data++;
        }
}

static void setup_qtable(struct gspca_dev *gspca_dev,
                        const u8 qtable[2][64])
{
        int i;

        /* loop over y components */
        for (i = 0; i < 64; i++)
                reg_w_riv(gspca_dev, 0x00, 0x2800 + i, qtable[0][i]);

        /* loop over c components */
        for (i = 0; i < 64; i++)
                reg_w_riv(gspca_dev, 0x00, 0x2840 + i, qtable[1][i]);
}

static void spca504_acknowledged_command(struct gspca_dev *gspca_dev,
                             u8 req, u16 idx, u16 val)
{
        reg_w_riv(gspca_dev, req, idx, val);
        reg_r(gspca_dev, 0x01, 0x0001, 1);
        PDEBUG(D_FRAM, "before wait 0x%04x", gspca_dev->usb_buf[0]);
        reg_w_riv(gspca_dev, req, idx, val);

        msleep(200);
        reg_r(gspca_dev, 0x01, 0x0001, 1);
        PDEBUG(D_FRAM, "after wait 0x%04x", gspca_dev->usb_buf[0]);
}

#ifdef GSPCA_DEBUG
static void spca504_read_info(struct gspca_dev *gspca_dev)
{
        int i;
        u8 info[6];

        for (i = 0; i < 6; i++) {
                reg_r(gspca_dev, 0, i, 1);
                info[i] = gspca_dev->usb_buf[0];
        }
        PDEBUG(D_STREAM,
                "Read info: %d %d %d %d %d %d."
                " Should be 1,0,2,2,0,0",
                info[0], info[1], info[2],
                info[3], info[4], info[5]);
}
#endif

static void spca504A_acknowledged_command(struct gspca_dev *gspca_dev,
                        u8 req,
                        u16 idx, u16 val, u8 endcode, u8 count)
{
        u16 status;

        reg_w_riv(gspca_dev, req, idx, val);
        reg_r(gspca_dev, 0x01, 0x0001, 1);
        if (gspca_dev->usb_err < 0)
                return;
        PDEBUG(D_FRAM, "Status 0x%02x Need 0x%02x",
                        gspca_dev->usb_buf[0], endcode);
        if (!count)
                return;
        count = 200;
        while (--count > 0) {
                msleep(10);
                /* gsmart mini2 write a each wait setting 1 ms is enough */
/*              reg_w_riv(gspca_dev, req, idx, val); */
                reg_r(gspca_dev, 0x01, 0x0001, 1);
                status = gspca_dev->usb_buf[0];
                if (status == endcode) {
                        PDEBUG(D_FRAM, "status 0x%04x after wait %d",
                                status, 200 - count);
                                break;
                }
        }
}

static void spca504B_PollingDataReady(struct gspca_dev *gspca_dev)
{
        int count = 10;

        while (--count > 0) {
                reg_r(gspca_dev, 0x21, 0, 1);
                if ((gspca_dev->usb_buf[0] & 0x01) == 0)
                        break;
                msleep(10);
        }
}

static void spca504B_WaitCmdStatus(struct gspca_dev *gspca_dev)
{
        int count = 50;

        while (--count > 0) {
                reg_r(gspca_dev, 0x21, 1, 1);
                if (gspca_dev->usb_buf[0] != 0) {
                        reg_w_1(gspca_dev, 0x21, 0, 1, 0);
                        reg_r(gspca_dev, 0x21, 1, 1);
                        spca504B_PollingDataReady(gspca_dev);
                        break;
                }
                msleep(10);
        }
}

#ifdef GSPCA_DEBUG
static void spca50x_GetFirmware(struct gspca_dev *gspca_dev)
{
        u8 *data;

        data = gspca_dev->usb_buf;
        reg_r(gspca_dev, 0x20, 0, 5);
        PDEBUG(D_STREAM, "FirmWare: %d %d %d %d %d",
                data[0], data[1], data[2], data[3], data[4]);
        reg_r(gspca_dev, 0x23, 0, 64);
        reg_r(gspca_dev, 0x23, 1, 64);
}
#endif

static void spca504B_SetSizeType(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        u8 Size;

        Size = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
        switch (sd->bridge) {
        case BRIDGE_SPCA533:
                reg_w_riv(gspca_dev, 0x31, 0, 0);
                spca504B_WaitCmdStatus(gspca_dev);
                spca504B_PollingDataReady(gspca_dev);
#ifdef GSPCA_DEBUG
                spca50x_GetFirmware(gspca_dev);
#endif
                reg_w_1(gspca_dev, 0x24, 0, 8, 2);              /* type */
                reg_r(gspca_dev, 0x24, 8, 1);

                reg_w_1(gspca_dev, 0x25, 0, 4, Size);
                reg_r(gspca_dev, 0x25, 4, 1);                   /* size */
                spca504B_PollingDataReady(gspca_dev);

                /* Init the cam width height with some values get on init ? */
                reg_w_riv(gspca_dev, 0x31, 0x0004, 0x00);
                spca504B_WaitCmdStatus(gspca_dev);
                spca504B_PollingDataReady(gspca_dev);
                break;
        default:
/* case BRIDGE_SPCA504B: */
/* case BRIDGE_SPCA536: */
                reg_w_1(gspca_dev, 0x25, 0, 4, Size);
                reg_r(gspca_dev, 0x25, 4, 1);                   /* size */
                reg_w_1(gspca_dev, 0x27, 0, 0, 6);
                reg_r(gspca_dev, 0x27, 0, 1);                   /* type */
                spca504B_PollingDataReady(gspca_dev);
                break;
        case BRIDGE_SPCA504:
                Size += 3;
                if (sd->subtype == AiptekMiniPenCam13) {
                        /* spca504a aiptek */
                        spca504A_acknowledged_command(gspca_dev,
                                                0x08, Size, 0,
                                                0x80 | (Size & 0x0f), 1);
                        spca504A_acknowledged_command(gspca_dev,
                                                        1, 3, 0, 0x9f, 0);
                } else {
                        spca504_acknowledged_command(gspca_dev, 0x08, Size, 0);
                }
                break;
        case BRIDGE_SPCA504C:
                /* capture mode */
                reg_w_riv(gspca_dev, 0xa0, (0x0500 | (Size & 0x0f)), 0x00);
                reg_w_riv(gspca_dev, 0x20, 0x01, 0x0500 | (Size & 0x0f));
                break;
        }
}

static void spca504_wait_status(struct gspca_dev *gspca_dev)
{
        int cnt;

        cnt = 256;
        while (--cnt > 0) {
                /* With this we get the status, when return 0 it's all ok */
                reg_r(gspca_dev, 0x06, 0x00, 1);
                if (gspca_dev->usb_buf[0] == 0)
                        return;
                msleep(10);
        }
}

static void spca504B_setQtable(struct gspca_dev *gspca_dev)
{
        reg_w_1(gspca_dev, 0x26, 0, 0, 3);
        reg_r(gspca_dev, 0x26, 0, 1);
        spca504B_PollingDataReady(gspca_dev);
}

static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;
        u16 reg;

        reg = sd->bridge == BRIDGE_SPCA536 ? 0x20f0 : 0x21a7;
        reg_w_riv(gspca_dev, 0x00, reg, val);
}

static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;
        u16 reg;

        reg = sd->bridge == BRIDGE_SPCA536 ? 0x20f1 : 0x21a8;
        reg_w_riv(gspca_dev, 0x00, reg, val);
}

static void setcolors(struct gspca_dev *gspca_dev, s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;
        u16 reg;

        reg = sd->bridge == BRIDGE_SPCA536 ? 0x20f6 : 0x21ae;
        reg_w_riv(gspca_dev, 0x00, reg, val);
}

static void init_ctl_reg(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int pollreg = 1;

        switch (sd->bridge) {
        case BRIDGE_SPCA504:
        case BRIDGE_SPCA504C:
                pollreg = 0;
                /* fall thru */
        default:
/*      case BRIDGE_SPCA533: */
/*      case BRIDGE_SPCA504B: */
                reg_w_riv(gspca_dev, 0, 0x21ad, 0x00);  /* hue */
                reg_w_riv(gspca_dev, 0, 0x21ac, 0x01);  /* sat/hue */
                reg_w_riv(gspca_dev, 0, 0x21a3, 0x00);  /* gamma */
                break;
        case BRIDGE_SPCA536:
                reg_w_riv(gspca_dev, 0, 0x20f5, 0x40);
                reg_w_riv(gspca_dev, 0, 0x20f4, 0x01);
                reg_w_riv(gspca_dev, 0, 0x2089, 0x00);
                break;
        }
        if (pollreg)
                spca504B_PollingDataReady(gspca_dev);
}

/* 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;

        sd->bridge = id->driver_info >> 8;
        sd->subtype = id->driver_info;

        if (sd->subtype == AiptekMiniPenCam13) {

                /* try to get the firmware as some cam answer 2.0.1.2.2
                 * and should be a spca504b then overwrite that setting */
                reg_r(gspca_dev, 0x20, 0, 1);
                switch (gspca_dev->usb_buf[0]) {
                case 1:
                        break;          /* (right bridge/subtype) */
                case 2:
                        sd->bridge = BRIDGE_SPCA504B;
                        sd->subtype = 0;
                        break;
                default:
                        return -ENODEV;
                }
        }

        switch (sd->bridge) {
        default:
/*      case BRIDGE_SPCA504B: */
/*      case BRIDGE_SPCA504: */
/*      case BRIDGE_SPCA536: */
                cam->cam_mode = vga_mode;
                cam->nmodes = ARRAY_SIZE(vga_mode);
                break;
        case BRIDGE_SPCA533:
                cam->cam_mode = custom_mode;
                if (sd->subtype == MegaImageVI)         /* 320x240 only */
                        cam->nmodes = ARRAY_SIZE(custom_mode) - 1;
                else
                        cam->nmodes = ARRAY_SIZE(custom_mode);
                break;
        case BRIDGE_SPCA504C:
                cam->cam_mode = vga_mode2;
                cam->nmodes = ARRAY_SIZE(vga_mode2);
                break;
        }
        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;

        switch (sd->bridge) {
        case BRIDGE_SPCA504B:
                reg_w_riv(gspca_dev, 0x1d, 0x00, 0);
                reg_w_riv(gspca_dev, 0x00, 0x2306, 0x01);
                reg_w_riv(gspca_dev, 0x00, 0x0d04, 0x00);
                reg_w_riv(gspca_dev, 0x00, 0x2000, 0x00);
                reg_w_riv(gspca_dev, 0x00, 0x2301, 0x13);
                reg_w_riv(gspca_dev, 0x00, 0x2306, 0x00);
                /* fall thru */
        case BRIDGE_SPCA533:
                spca504B_PollingDataReady(gspca_dev);
#ifdef GSPCA_DEBUG
                spca50x_GetFirmware(gspca_dev);
#endif
                break;
        case BRIDGE_SPCA536:
#ifdef GSPCA_DEBUG
                spca50x_GetFirmware(gspca_dev);
#endif
                reg_r(gspca_dev, 0x00, 0x5002, 1);
                reg_w_1(gspca_dev, 0x24, 0, 0, 0);
                reg_r(gspca_dev, 0x24, 0, 1);
                spca504B_PollingDataReady(gspca_dev);
                reg_w_riv(gspca_dev, 0x34, 0, 0);
                spca504B_WaitCmdStatus(gspca_dev);
                break;
        case BRIDGE_SPCA504C:   /* pccam600 */
                PDEBUG(D_STREAM, "Opening SPCA504 (PC-CAM 600)");
                reg_w_riv(gspca_dev, 0xe0, 0x0000, 0x0000);
                reg_w_riv(gspca_dev, 0xe0, 0x0000, 0x0001);     /* reset */
                spca504_wait_status(gspca_dev);
                if (sd->subtype == LogitechClickSmart420)
                        write_vector(gspca_dev,
                                spca504A_clicksmart420_open_data,
                                ARRAY_SIZE(spca504A_clicksmart420_open_data));
                else
                        write_vector(gspca_dev, spca504_pccam600_open_data,
                                ARRAY_SIZE(spca504_pccam600_open_data));
                setup_qtable(gspca_dev, qtable_creative_pccam);
                break;
        default:
/*      case BRIDGE_SPCA504: */
                PDEBUG(D_STREAM, "Opening SPCA504");
                if (sd->subtype == AiptekMiniPenCam13) {
#ifdef GSPCA_DEBUG
                        spca504_read_info(gspca_dev);
#endif

                        /* Set AE AWB Banding Type 3-> 50Hz 2-> 60Hz */
                        spca504A_acknowledged_command(gspca_dev, 0x24,
                                                        8, 3, 0x9e, 1);
                        /* Twice sequential need status 0xff->0x9e->0x9d */
                        spca504A_acknowledged_command(gspca_dev, 0x24,
                                                        8, 3, 0x9e, 0);

                        spca504A_acknowledged_command(gspca_dev, 0x24,
                                                        0, 0, 0x9d, 1);
                        /******************************/
                        /* spca504a aiptek */
                        spca504A_acknowledged_command(gspca_dev, 0x08,
                                                        6, 0, 0x86, 1);
/*                      reg_write (dev, 0, 0x2000, 0); */
/*                      reg_write (dev, 0, 0x2883, 1); */
/*                      spca504A_acknowledged_command (gspca_dev, 0x08,
                                                        6, 0, 0x86, 1); */
/*                      spca504A_acknowledged_command (gspca_dev, 0x24,
                                                        0, 0, 0x9D, 1); */
                        reg_w_riv(gspca_dev, 0x00, 0x270c, 0x05);
                                                        /* L92 sno1t.txt */
                        reg_w_riv(gspca_dev, 0x00, 0x2310, 0x05);
                        spca504A_acknowledged_command(gspca_dev, 0x01,
                                                        0x0f, 0, 0xff, 0);
                }
                /* setup qtable */
                reg_w_riv(gspca_dev, 0, 0x2000, 0);
                reg_w_riv(gspca_dev, 0, 0x2883, 1);
                setup_qtable(gspca_dev, qtable_spca504_default);
                break;
        }
        return gspca_dev->usb_err;
}

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

        /* create the JPEG header */
        jpeg_define(sd->jpeg_hdr, gspca_dev->height, gspca_dev->width,
                        0x22);          /* JPEG 411 */
        jpeg_set_qual(sd->jpeg_hdr, QUALITY);

        if (sd->bridge == BRIDGE_SPCA504B)
                spca504B_setQtable(gspca_dev);
        spca504B_SetSizeType(gspca_dev);
        switch (sd->bridge) {
        default:
/*      case BRIDGE_SPCA504B: */
/*      case BRIDGE_SPCA533: */
/*      case BRIDGE_SPCA536: */
                switch (sd->subtype) {
                case MegapixV4:
                case LogitechClickSmart820:
                case MegaImageVI:
                        reg_w_riv(gspca_dev, 0xf0, 0, 0);
                        spca504B_WaitCmdStatus(gspca_dev);
                        reg_r(gspca_dev, 0xf0, 4, 0);
                        spca504B_WaitCmdStatus(gspca_dev);
                        break;
                default:
                        reg_w_riv(gspca_dev, 0x31, 0x0004, 0x00);
                        spca504B_WaitCmdStatus(gspca_dev);
                        spca504B_PollingDataReady(gspca_dev);
                        break;
                }
                break;
        case BRIDGE_SPCA504:
                if (sd->subtype == AiptekMiniPenCam13) {
#ifdef GSPCA_DEBUG
                        spca504_read_info(gspca_dev);
#endif

                        /* Set AE AWB Banding Type 3-> 50Hz 2-> 60Hz */
                        spca504A_acknowledged_command(gspca_dev, 0x24,
                                                        8, 3, 0x9e, 1);
                        /* Twice sequential need status 0xff->0x9e->0x9d */
                        spca504A_acknowledged_command(gspca_dev, 0x24,
                                                        8, 3, 0x9e, 0);
                        spca504A_acknowledged_command(gspca_dev, 0x24,
                                                        0, 0, 0x9d, 1);
                } else {
                        spca504_acknowledged_command(gspca_dev, 0x24, 8, 3);
#ifdef GSPCA_DEBUG
                        spca504_read_info(gspca_dev);
#endif
                        spca504_acknowledged_command(gspca_dev, 0x24, 8, 3);
                        spca504_acknowledged_command(gspca_dev, 0x24, 0, 0);
                }
                spca504B_SetSizeType(gspca_dev);
                reg_w_riv(gspca_dev, 0x00, 0x270c, 0x05);
                                                        /* L92 sno1t.txt */
                reg_w_riv(gspca_dev, 0x00, 0x2310, 0x05);
                break;
        case BRIDGE_SPCA504C:
                if (sd->subtype == LogitechClickSmart420) {
                        write_vector(gspca_dev,
                                spca504A_clicksmart420_init_data,
                                ARRAY_SIZE(spca504A_clicksmart420_init_data));
                } else {
                        write_vector(gspca_dev, spca504_pccam600_init_data,
                                ARRAY_SIZE(spca504_pccam600_init_data));
                }
                enable = (sd->autogain ? 0x04 : 0x01);
                reg_w_riv(gspca_dev, 0x0c, 0x0000, enable);
                                                        /* auto exposure */
                reg_w_riv(gspca_dev, 0xb0, 0x0000, enable);
                                                        /* auto whiteness */

                /* set default exposure compensation and whiteness balance */
                reg_w_riv(gspca_dev, 0x30, 0x0001, 800);        /* ~ 20 fps */
                reg_w_riv(gspca_dev, 0x30, 0x0002, 1600);
                spca504B_SetSizeType(gspca_dev);
                break;
        }
        init_ctl_reg(gspca_dev);
        return gspca_dev->usb_err;
}

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

        switch (sd->bridge) {
        default:
/*      case BRIDGE_SPCA533: */
/*      case BRIDGE_SPCA536: */
/*      case BRIDGE_SPCA504B: */
                reg_w_riv(gspca_dev, 0x31, 0, 0);
                spca504B_WaitCmdStatus(gspca_dev);
                spca504B_PollingDataReady(gspca_dev);
                break;
        case BRIDGE_SPCA504:
        case BRIDGE_SPCA504C:
                reg_w_riv(gspca_dev, 0x00, 0x2000, 0x0000);

                if (sd->subtype == AiptekMiniPenCam13) {
                        /* spca504a aiptek */
/*                      spca504A_acknowledged_command(gspca_dev, 0x08,
                                                         6, 0, 0x86, 1); */
                        spca504A_acknowledged_command(gspca_dev, 0x24,
                                                        0x00, 0x00, 0x9d, 1);
                        spca504A_acknowledged_command(gspca_dev, 0x01,
                                                        0x0f, 0x00, 0xff, 1);
                } else {
                        spca504_acknowledged_command(gspca_dev, 0x24, 0, 0);
                        reg_w_riv(gspca_dev, 0x01, 0x000f, 0x0000);
                }
                break;
        }
}

static void sd_pkt_scan(struct gspca_dev *gspca_dev,
                        u8 *data,                       /* isoc packet */
                        int len)                        /* iso packet length */
{
        struct sd *sd = (struct sd *) gspca_dev;
        int i, sof = 0;
        static u8 ffd9[] = {0xff, 0xd9};

/* frames are jpeg 4.1.1 without 0xff escape */
        switch (sd->bridge) {
        case BRIDGE_SPCA533:
                if (data[0] == 0xff) {
                        if (data[1] != 0x01) {  /* drop packet */
/*                              gspca_dev->last_packet_type = DISCARD_PACKET; */
                                return;
                        }
                        sof = 1;
                        data += SPCA533_OFFSET_DATA;
                        len -= SPCA533_OFFSET_DATA;
                } else {
                        data += 1;
                        len -= 1;
                }
                break;
        case BRIDGE_SPCA536:
                if (data[0] == 0xff) {
                        sof = 1;
                        data += SPCA536_OFFSET_DATA;
                        len -= SPCA536_OFFSET_DATA;
                } else {
                        data += 2;
                        len -= 2;
                }
                break;
        default:
/*      case BRIDGE_SPCA504: */
/*      case BRIDGE_SPCA504B: */
                switch (data[0]) {
                case 0xfe:                      /* start of frame */
                        sof = 1;
                        data += SPCA50X_OFFSET_DATA;
                        len -= SPCA50X_OFFSET_DATA;
                        break;
                case 0xff:                      /* drop packet */
/*                      gspca_dev->last_packet_type = DISCARD_PACKET; */
                        return;
                default:
                        data += 1;
                        len -= 1;
                        break;
                }
                break;
        case BRIDGE_SPCA504C:
                switch (data[0]) {
                case 0xfe:                      /* start of frame */
                        sof = 1;
                        data += SPCA504_PCCAM600_OFFSET_DATA;
                        len -= SPCA504_PCCAM600_OFFSET_DATA;
                        break;
                case 0xff:                      /* drop packet */
/*                      gspca_dev->last_packet_type = DISCARD_PACKET; */
                        return;
                default:
                        data += 1;
                        len -= 1;
                        break;
                }
                break;
        }
        if (sof) {              /* start of frame */
                gspca_frame_add(gspca_dev, LAST_PACKET,
                                ffd9, 2);

                /* put the JPEG header in the new frame */
                gspca_frame_add(gspca_dev, FIRST_PACKET,
                        sd->jpeg_hdr, JPEG_HDR_SZ);
        }

        /* add 0x00 after 0xff */
        i = 0;
        do {
                if (data[i] == 0xff) {
                        gspca_frame_add(gspca_dev, INTER_PACKET,
                                        data, i + 1);
                        len -= i;
                        data += i;
                        *data = 0x00;
                        i = 0;
                }
                i++;
        } while (i < len);
        gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}

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

        gspca_dev->usb_err = 0;

        if (!gspca_dev->streaming)
                return 0;

        switch (ctrl->id) {
        case V4L2_CID_BRIGHTNESS:
                setbrightness(gspca_dev, ctrl->val);
                break;
        case V4L2_CID_CONTRAST:
                setcontrast(gspca_dev, ctrl->val);
                break;
        case V4L2_CID_SATURATION:
                setcolors(gspca_dev, ctrl->val);
                break;
        case V4L2_CID_AUTOGAIN:
                sd->autogain = 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, 4);
        v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
        v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_CONTRAST, 0, 255, 1, 0x20);
        v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_SATURATION, 0, 255, 1, 0x1a);
        v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_AUTOGAIN, 0, 1, 1, 1);

        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 = sd_init,
        .init_controls = sd_init_controls,
        .start = sd_start,
        .stopN = sd_stopN,
        .pkt_scan = sd_pkt_scan,
};

/* -- module initialisation -- */
#define BS(bridge, subtype) \
        .driver_info = (BRIDGE_ ## bridge << 8) \
                        | (subtype)

static const struct usb_device_id device_table[] = {
        {USB_DEVICE(0x041e, 0x400b), BS(SPCA504C, 0)},
        {USB_DEVICE(0x041e, 0x4012), BS(SPCA504C, 0)},
        {USB_DEVICE(0x041e, 0x4013), BS(SPCA504C, 0)},
        {USB_DEVICE(0x0458, 0x7006), BS(SPCA504B, 0)},
        {USB_DEVICE(0x0461, 0x0821), BS(SPCA533, 0)},
        {USB_DEVICE(0x046d, 0x0905), BS(SPCA533, LogitechClickSmart820)},
        {USB_DEVICE(0x046d, 0x0960), BS(SPCA504C, LogitechClickSmart420)},
        {USB_DEVICE(0x0471, 0x0322), BS(SPCA504B, 0)},
        {USB_DEVICE(0x04a5, 0x3003), BS(SPCA504B, 0)},
        {USB_DEVICE(0x04a5, 0x3008), BS(SPCA533, 0)},
        {USB_DEVICE(0x04a5, 0x300a), BS(SPCA533, 0)},
        {USB_DEVICE(0x04f1, 0x1001), BS(SPCA504B, 0)},
        {USB_DEVICE(0x04fc, 0x500c), BS(SPCA504B, 0)},
        {USB_DEVICE(0x04fc, 0x504a), BS(SPCA504, AiptekMiniPenCam13)},
        {USB_DEVICE(0x04fc, 0x504b), BS(SPCA504B, 0)},
        {USB_DEVICE(0x04fc, 0x5330), BS(SPCA533, 0)},
        {USB_DEVICE(0x04fc, 0x5360), BS(SPCA536, 0)},
        {USB_DEVICE(0x04fc, 0xffff), BS(SPCA504B, 0)},
        {USB_DEVICE(0x052b, 0x1507), BS(SPCA533, MegapixV4)},
        {USB_DEVICE(0x052b, 0x1513), BS(SPCA533, MegapixV4)},
        {USB_DEVICE(0x052b, 0x1803), BS(SPCA533, MegaImageVI)},
        {USB_DEVICE(0x0546, 0x3155), BS(SPCA533, 0)},
        {USB_DEVICE(0x0546, 0x3191), BS(SPCA504B, 0)},
        {USB_DEVICE(0x0546, 0x3273), BS(SPCA504B, 0)},
        {USB_DEVICE(0x055f, 0xc211), BS(SPCA536, 0)},
        {USB_DEVICE(0x055f, 0xc230), BS(SPCA533, 0)},
        {USB_DEVICE(0x055f, 0xc232), BS(SPCA533, 0)},
        {USB_DEVICE(0x055f, 0xc360), BS(SPCA536, 0)},
        {USB_DEVICE(0x055f, 0xc420), BS(SPCA504, 0)},
        {USB_DEVICE(0x055f, 0xc430), BS(SPCA533, 0)},
        {USB_DEVICE(0x055f, 0xc440), BS(SPCA533, 0)},
        {USB_DEVICE(0x055f, 0xc520), BS(SPCA504, 0)},
        {USB_DEVICE(0x055f, 0xc530), BS(SPCA533, 0)},
        {USB_DEVICE(0x055f, 0xc540), BS(SPCA533, 0)},
        {USB_DEVICE(0x055f, 0xc630), BS(SPCA533, 0)},
        {USB_DEVICE(0x055f, 0xc650), BS(SPCA533, 0)},
        {USB_DEVICE(0x05da, 0x1018), BS(SPCA504B, 0)},
        {USB_DEVICE(0x06d6, 0x0031), BS(SPCA533, 0)},
        {USB_DEVICE(0x0733, 0x1311), BS(SPCA533, 0)},
        {USB_DEVICE(0x0733, 0x1314), BS(SPCA533, 0)},
        {USB_DEVICE(0x0733, 0x2211), BS(SPCA533, 0)},
        {USB_DEVICE(0x0733, 0x2221), BS(SPCA533, 0)},
        {USB_DEVICE(0x0733, 0x3261), BS(SPCA536, 0)},
        {USB_DEVICE(0x0733, 0x3281), BS(SPCA536, 0)},
        {USB_DEVICE(0x08ca, 0x0104), BS(SPCA533, 0)},
        {USB_DEVICE(0x08ca, 0x0106), BS(SPCA533, 0)},
        {USB_DEVICE(0x08ca, 0x2008), BS(SPCA504B, 0)},
        {USB_DEVICE(0x08ca, 0x2010), BS(SPCA533, 0)},
        {USB_DEVICE(0x08ca, 0x2016), BS(SPCA504B, 0)},
        {USB_DEVICE(0x08ca, 0x2018), BS(SPCA504B, 0)},
        {USB_DEVICE(0x08ca, 0x2020), BS(SPCA533, 0)},
        {USB_DEVICE(0x08ca, 0x2022), BS(SPCA533, 0)},
        {USB_DEVICE(0x08ca, 0x2024), BS(SPCA536, 0)},
        {USB_DEVICE(0x08ca, 0x2028), BS(SPCA533, 0)},
        {USB_DEVICE(0x08ca, 0x2040), BS(SPCA536, 0)},
        {USB_DEVICE(0x08ca, 0x2042), BS(SPCA536, 0)},
        {USB_DEVICE(0x08ca, 0x2050), BS(SPCA536, 0)},
        {USB_DEVICE(0x08ca, 0x2060), BS(SPCA536, 0)},
        {USB_DEVICE(0x0d64, 0x0303), BS(SPCA536, 0)},
        {}
};
MODULE_DEVICE_TABLE(usb, device_table);

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

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

module_usb_driver(sd_driver);