pac7302.c 32.1 KB
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/*
 *		Pixart PAC7302 library
 *		Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
 *
 * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
 *
 * Separated from Pixart PAC7311 library by Mrton Nmeth <nm127@freemail.hu>
 *
 * 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
 */

/* Some documentation about various registers as determined by trial and error.
   When the register addresses differ between the 7202 and the 7311 the 2
   different addresses are written as 7302addr/7311addr, when one of the 2
   addresses is a - sign that register description is not valid for the
   matching IC.

   Register page 1:

   Address	Description
   -/0x08	Unknown compressor related, must always be 8 except when not
		in 640x480 resolution and page 4 reg 2 <= 3 then set it to 9 !
   -/0x1b	Auto white balance related, bit 0 is AWB enable (inverted)
		bits 345 seem to toggle per color gains on/off (inverted)
   0x78		Global control, bit 6 controls the LED (inverted)
   -/0x80	JPEG compression ratio ? Best not touched

   Register page 3/4:

   Address	Description
   0x02		Clock divider 2-63, fps =~ 60 / val. Must be a multiple of 3 on
		the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
   -/0x0f	Master gain 1-245, low value = high gain
   0x10/-	Master gain 0-31
   -/0x10	Another gain 0-15, limited influence (1-2x gain I guess)
   0x21		Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
   -/0x27	Seems to toggle various gains on / off, Setting bit 7 seems to
		completely disable the analog amplification block. Set to 0x68
		for max gain, 0x14 for minimal gain.
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   The registers are accessed in the following functions:

   Page | Register   | Function
   -----+------------+---------------------------------------------------
    0   | 0x0f..0x20 | setcolors()
    0   | 0xa2..0xab | setbrightcont()
    0   | 0xc5       | setredbalance()
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    0   | 0xc6       | setwhitebalance()
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    0   | 0xc7       | setbluebalance()
    0   | 0xdc       | setbrightcont(), setcolors()
    3   | 0x02       | setexposure()
    3   | 0x10       | setgain()
    3   | 0x11       | setcolors(), setgain(), setexposure(), sethvflip()
    3   | 0x21       | sethvflip()
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*/

#define MODULE_NAME "pac7302"

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#include <media/v4l2-chip-ident.h>
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#include "gspca.h"

MODULE_AUTHOR("Thomas Kaiser thomas@kaiser-linux.li");
MODULE_DESCRIPTION("Pixart PAC7302");
MODULE_LICENSE("GPL");

/* specific webcam descriptor for pac7302 */
struct sd {
	struct gspca_dev gspca_dev;		/* !! must be the first item */

	unsigned char brightness;
	unsigned char contrast;
	unsigned char colors;
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	unsigned char white_balance;
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	unsigned char red_balance;
	unsigned char blue_balance;
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	unsigned char gain;
	unsigned char exposure;
	unsigned char autogain;
	__u8 hflip;
	__u8 vflip;
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	u8 flags;
#define FL_HFLIP 0x01		/* mirrored by default */
#define FL_VFLIP 0x02		/* vertical flipped by default */
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	u8 sof_read;
	u8 autogain_ignore_frames;

	atomic_t avg_lum;
};

/* V4L2 controls supported by the driver */
static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setcolors(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getcolors(struct gspca_dev *gspca_dev, __s32 *val);
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static int sd_setwhitebalance(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getwhitebalance(struct gspca_dev *gspca_dev, __s32 *val);
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static int sd_setredbalance(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getredbalance(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setbluebalance(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getbluebalance(struct gspca_dev *gspca_dev, __s32 *val);
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static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_sethflip(struct gspca_dev *gspca_dev, __s32 val);
static int sd_gethflip(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setvflip(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getvflip(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val);

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static const struct ctrl sd_ctrls[] = {
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/* This control is pac7302 only */
	{
	    {
		.id      = V4L2_CID_BRIGHTNESS,
		.type    = V4L2_CTRL_TYPE_INTEGER,
		.name    = "Brightness",
		.minimum = 0,
#define BRIGHTNESS_MAX 0x20
		.maximum = BRIGHTNESS_MAX,
		.step    = 1,
#define BRIGHTNESS_DEF 0x10
		.default_value = BRIGHTNESS_DEF,
	    },
	    .set = sd_setbrightness,
	    .get = sd_getbrightness,
	},
/* This control is for both the 7302 and the 7311 */
	{
	    {
		.id      = V4L2_CID_CONTRAST,
		.type    = V4L2_CTRL_TYPE_INTEGER,
		.name    = "Contrast",
		.minimum = 0,
#define CONTRAST_MAX 255
		.maximum = CONTRAST_MAX,
		.step    = 1,
#define CONTRAST_DEF 127
		.default_value = CONTRAST_DEF,
	    },
	    .set = sd_setcontrast,
	    .get = sd_getcontrast,
	},
/* This control is pac7302 only */
	{
	    {
		.id      = V4L2_CID_SATURATION,
		.type    = V4L2_CTRL_TYPE_INTEGER,
		.name    = "Saturation",
		.minimum = 0,
#define COLOR_MAX 255
		.maximum = COLOR_MAX,
		.step    = 1,
#define COLOR_DEF 127
		.default_value = COLOR_DEF,
	    },
	    .set = sd_setcolors,
	    .get = sd_getcolors,
	},
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	{
	    {
		.id      = V4L2_CID_WHITE_BALANCE_TEMPERATURE,
		.type    = V4L2_CTRL_TYPE_INTEGER,
		.name    = "White Balance",
		.minimum = 0,
		.maximum = 255,
		.step    = 1,
#define WHITEBALANCE_DEF 4
		.default_value = WHITEBALANCE_DEF,
	    },
	    .set = sd_setwhitebalance,
	    .get = sd_getwhitebalance,
	},
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	{
	    {
		.id      = V4L2_CID_RED_BALANCE,
		.type    = V4L2_CTRL_TYPE_INTEGER,
		.name    = "Red",
		.minimum = 0,
		.maximum = 3,
		.step    = 1,
#define REDBALANCE_DEF 1
		.default_value = REDBALANCE_DEF,
	    },
	    .set = sd_setredbalance,
	    .get = sd_getredbalance,
	},
	{
	    {
		.id      = V4L2_CID_BLUE_BALANCE,
		.type    = V4L2_CTRL_TYPE_INTEGER,
		.name    = "Blue",
		.minimum = 0,
		.maximum = 3,
		.step    = 1,
#define BLUEBALANCE_DEF 1
		.default_value = BLUEBALANCE_DEF,
	    },
	    .set = sd_setbluebalance,
	    .get = sd_getbluebalance,
	},
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/* All controls below are for both the 7302 and the 7311 */
	{
	    {
		.id      = V4L2_CID_GAIN,
		.type    = V4L2_CTRL_TYPE_INTEGER,
		.name    = "Gain",
		.minimum = 0,
#define GAIN_MAX 255
		.maximum = GAIN_MAX,
		.step    = 1,
#define GAIN_DEF 127
#define GAIN_KNEE 255 /* Gain seems to cause little noise on the pac73xx */
		.default_value = GAIN_DEF,
	    },
	    .set = sd_setgain,
	    .get = sd_getgain,
	},
	{
	    {
		.id      = V4L2_CID_EXPOSURE,
		.type    = V4L2_CTRL_TYPE_INTEGER,
		.name    = "Exposure",
		.minimum = 0,
#define EXPOSURE_MAX 255
		.maximum = EXPOSURE_MAX,
		.step    = 1,
#define EXPOSURE_DEF  16 /*  32 ms / 30 fps */
#define EXPOSURE_KNEE 50 /* 100 ms / 10 fps */
		.default_value = EXPOSURE_DEF,
	    },
	    .set = sd_setexposure,
	    .get = sd_getexposure,
	},
	{
	    {
		.id      = V4L2_CID_AUTOGAIN,
		.type    = V4L2_CTRL_TYPE_BOOLEAN,
		.name    = "Auto Gain",
		.minimum = 0,
		.maximum = 1,
		.step    = 1,
#define AUTOGAIN_DEF 1
		.default_value = AUTOGAIN_DEF,
	    },
	    .set = sd_setautogain,
	    .get = sd_getautogain,
	},
	{
	    {
		.id      = V4L2_CID_HFLIP,
		.type    = V4L2_CTRL_TYPE_BOOLEAN,
		.name    = "Mirror",
		.minimum = 0,
		.maximum = 1,
		.step    = 1,
#define HFLIP_DEF 0
		.default_value = HFLIP_DEF,
	    },
	    .set = sd_sethflip,
	    .get = sd_gethflip,
	},
	{
	    {
		.id      = V4L2_CID_VFLIP,
		.type    = V4L2_CTRL_TYPE_BOOLEAN,
		.name    = "Vflip",
		.minimum = 0,
		.maximum = 1,
		.step    = 1,
#define VFLIP_DEF 0
		.default_value = VFLIP_DEF,
	    },
	    .set = sd_setvflip,
	    .get = sd_getvflip,
	},
};

static const struct v4l2_pix_format vga_mode[] = {
	{640, 480, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
		.bytesperline = 640,
		.sizeimage = 640 * 480 * 3 / 8 + 590,
		.colorspace = V4L2_COLORSPACE_JPEG,
		.priv = 0},
};

#define LOAD_PAGE3		255
#define END_OF_SEQUENCE		0

/* pac 7302 */
static const __u8 init_7302[] = {
/*	index,value */
	0xff, 0x01,		/* page 1 */
	0x78, 0x00,		/* deactivate */
	0xff, 0x01,
	0x78, 0x40,		/* led off */
};
static const __u8 start_7302[] = {
/*	index, len, [value]* */
	0xff, 1,	0x00,		/* page 0 */
	0x00, 12,	0x01, 0x40, 0x40, 0x40, 0x01, 0xe0, 0x02, 0x80,
			0x00, 0x00, 0x00, 0x00,
	0x0d, 24,	0x03, 0x01, 0x00, 0xb5, 0x07, 0xcb, 0x00, 0x00,
			0x07, 0xc8, 0x00, 0xea, 0x07, 0xcf, 0x07, 0xf7,
			0x07, 0x7e, 0x01, 0x0b, 0x00, 0x00, 0x00, 0x11,
	0x26, 2,	0xaa, 0xaa,
	0x2e, 1,	0x31,
	0x38, 1,	0x01,
	0x3a, 3,	0x14, 0xff, 0x5a,
	0x43, 11,	0x00, 0x0a, 0x18, 0x11, 0x01, 0x2c, 0x88, 0x11,
			0x00, 0x54, 0x11,
	0x55, 1,	0x00,
	0x62, 4, 	0x10, 0x1e, 0x1e, 0x18,
	0x6b, 1,	0x00,
	0x6e, 3,	0x08, 0x06, 0x00,
	0x72, 3,	0x00, 0xff, 0x00,
	0x7d, 23,	0x01, 0x01, 0x58, 0x46, 0x50, 0x3c, 0x50, 0x3c,
			0x54, 0x46, 0x54, 0x56, 0x52, 0x50, 0x52, 0x50,
			0x56, 0x64, 0xa4, 0x00, 0xda, 0x00, 0x00,
	0xa2, 10,	0x22, 0x2c, 0x3c, 0x54, 0x69, 0x7c, 0x9c, 0xb9,
			0xd2, 0xeb,
	0xaf, 1,	0x02,
	0xb5, 2,	0x08, 0x08,
	0xb8, 2,	0x08, 0x88,
	0xc4, 4,	0xae, 0x01, 0x04, 0x01,
	0xcc, 1,	0x00,
	0xd1, 11,	0x01, 0x30, 0x49, 0x5e, 0x6f, 0x7f, 0x8e, 0xa9,
			0xc1, 0xd7, 0xec,
	0xdc, 1,	0x01,
	0xff, 1,	0x01,		/* page 1 */
	0x12, 3,	0x02, 0x00, 0x01,
	0x3e, 2,	0x00, 0x00,
	0x76, 5,	0x01, 0x20, 0x40, 0x00, 0xf2,
	0x7c, 1,	0x00,
	0x7f, 10,	0x4b, 0x0f, 0x01, 0x2c, 0x02, 0x58, 0x03, 0x20,
			0x02, 0x00,
	0x96, 5,	0x01, 0x10, 0x04, 0x01, 0x04,
	0xc8, 14,	0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00,
			0x07, 0x00, 0x01, 0x07, 0x04, 0x01,
	0xd8, 1,	0x01,
	0xdb, 2,	0x00, 0x01,
	0xde, 7,	0x00, 0x01, 0x04, 0x04, 0x00, 0x00, 0x00,
	0xe6, 4,	0x00, 0x00, 0x00, 0x01,
	0xeb, 1,	0x00,
	0xff, 1,	0x02,		/* page 2 */
	0x22, 1,	0x00,
	0xff, 1,	0x03,		/* page 3 */
	0, LOAD_PAGE3,			/* load the page 3 */
	0x11, 1,	0x01,
	0xff, 1,	0x02,		/* page 2 */
	0x13, 1,	0x00,
	0x22, 4,	0x1f, 0xa4, 0xf0, 0x96,
	0x27, 2,	0x14, 0x0c,
	0x2a, 5,	0xc8, 0x00, 0x18, 0x12, 0x22,
	0x64, 8,	0x00, 0x00, 0xf0, 0x01, 0x14, 0x44, 0x44, 0x44,
	0x6e, 1,	0x08,
	0xff, 1,	0x01,		/* page 1 */
	0x78, 1,	0x00,
	0, END_OF_SEQUENCE		/* end of sequence */
};

#define SKIP		0xaa
/* page 3 - the value SKIP says skip the index - see reg_w_page() */
static const __u8 page3_7302[] = {
	0x90, 0x40, 0x03, 0x50, 0xc2, 0x01, 0x14, 0x16,
	0x14, 0x12, 0x00, 0x00, 0x00, 0x02, 0x33, 0x00,
	0x0f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x47, 0x01, 0xb3, 0x01, 0x00,
	0x00, 0x08, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x21,
	0x00, 0x00, 0x00, 0x54, 0xf4, 0x02, 0x52, 0x54,
	0xa4, 0xb8, 0xe0, 0x2a, 0xf6, 0x00, 0x00, 0x00,
	0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0xfc, 0x00, 0xf2, 0x1f, 0x04, 0x00, 0x00,
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	SKIP, 0x00, 0x00, 0xc0, 0xc0, 0x10, 0x00, 0x00,
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	0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x40, 0xff, 0x03, 0x19, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0xc8, 0xc8, 0xc8,
	0xc8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50,
	0x08, 0x10, 0x24, 0x40, 0x00, 0x00, 0x00, 0x00,
	0x01, 0x00, 0x02, 0x47, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x02, 0xfa, 0x00, 0x64, 0x5a, 0x28, 0x00,
	0x00
};

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static int reg_w_buf(struct gspca_dev *gspca_dev,
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		  __u8 index,
		  const char *buffer, int len)
{
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	int ret;

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	memcpy(gspca_dev->usb_buf, buffer, len);
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	ret = usb_control_msg(gspca_dev->dev,
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			usb_sndctrlpipe(gspca_dev->dev, 0),
			1,		/* request */
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			0,		/* value */
			index, gspca_dev->usb_buf, len,
			500);
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	if (ret < 0)
		PDEBUG(D_ERR, "reg_w_buf(): "
		"Failed to write registers to index 0x%x, error %i",
		index, ret);
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	return ret;
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}


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static int reg_w(struct gspca_dev *gspca_dev,
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		  __u8 index,
		  __u8 value)
{
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	int ret;

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	gspca_dev->usb_buf[0] = value;
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	ret = usb_control_msg(gspca_dev->dev,
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			usb_sndctrlpipe(gspca_dev->dev, 0),
			0,			/* request */
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			0, index, gspca_dev->usb_buf, 1,
			500);
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	if (ret < 0)
		PDEBUG(D_ERR, "reg_w(): "
		"Failed to write register to index 0x%x, value 0x%x, error %i",
		index, value, ret);
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	return ret;
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}

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static int reg_w_seq(struct gspca_dev *gspca_dev,
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		const __u8 *seq, int len)
{
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	int ret = 0;
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	while (--len >= 0) {
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		if (0 <= ret)
			ret = reg_w(gspca_dev, seq[0], seq[1]);
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		seq += 2;
	}
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	return ret;
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}

/* load the beginning of a page */
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static int reg_w_page(struct gspca_dev *gspca_dev,
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			const __u8 *page, int len)
{
	int index;
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	int ret = 0;
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	for (index = 0; index < len; index++) {
		if (page[index] == SKIP)		/* skip this index */
			continue;
		gspca_dev->usb_buf[0] = page[index];
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		ret = usb_control_msg(gspca_dev->dev,
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				usb_sndctrlpipe(gspca_dev->dev, 0),
				0,			/* request */
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				0, index, gspca_dev->usb_buf, 1,
				500);
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		if (ret < 0) {
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			PDEBUG(D_ERR, "reg_w_page(): "
			"Failed to write register to index 0x%x, "
			"value 0x%x, error %i",
			index, page[index], ret);
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			break;
		}
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	}
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	return ret;
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}

/* output a variable sequence */
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static int reg_w_var(struct gspca_dev *gspca_dev,
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			const __u8 *seq,
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			const __u8 *page3, unsigned int page3_len)
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{
	int index, len;
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	int ret = 0;
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	for (;;) {
		index = *seq++;
		len = *seq++;
		switch (len) {
		case END_OF_SEQUENCE:
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			return ret;
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		case LOAD_PAGE3:
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			ret = reg_w_page(gspca_dev, page3, page3_len);
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			break;
		default:
			if (len > USB_BUF_SZ) {
				PDEBUG(D_ERR|D_STREAM,
					"Incorrect variable sequence");
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				return -EINVAL;
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			}
			while (len > 0) {
				if (len < 8) {
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					ret = reg_w_buf(gspca_dev,
						index, seq, len);
					if (ret < 0)
						return ret;
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					seq += len;
					break;
				}
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				ret = reg_w_buf(gspca_dev, index, seq, 8);
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				seq += 8;
				index += 8;
				len -= 8;
			}
		}
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		if (ret < 0)
			return ret;
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	}
	/* not reached */
}

/* this function is called at probe time for pac7302 */
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;

	PDEBUG(D_CONF, "Find Sensor PAC7302");
	cam->cam_mode = vga_mode;	/* only 640x480 */
	cam->nmodes = ARRAY_SIZE(vga_mode);

	sd->brightness = BRIGHTNESS_DEF;
	sd->contrast = CONTRAST_DEF;
	sd->colors = COLOR_DEF;
545
	sd->white_balance = WHITEBALANCE_DEF;
546 547
	sd->red_balance = REDBALANCE_DEF;
	sd->blue_balance = BLUEBALANCE_DEF;
548 549 550 551 552
	sd->gain = GAIN_DEF;
	sd->exposure = EXPOSURE_DEF;
	sd->autogain = AUTOGAIN_DEF;
	sd->hflip = HFLIP_DEF;
	sd->vflip = VFLIP_DEF;
553
	sd->flags = id->driver_info;
554 555 556 557
	return 0;
}

/* This function is used by pac7302 only */
558
static int setbrightcont(struct gspca_dev *gspca_dev)
559 560 561
{
	struct sd *sd = (struct sd *) gspca_dev;
	int i, v;
562
	int ret;
563 564 565 566 567 568 569
	static const __u8 max[10] =
		{0x29, 0x33, 0x42, 0x5a, 0x6e, 0x80, 0x9f, 0xbb,
		 0xd4, 0xec};
	static const __u8 delta[10] =
		{0x35, 0x33, 0x33, 0x2f, 0x2a, 0x25, 0x1e, 0x17,
		 0x11, 0x0b};

570
	ret = reg_w(gspca_dev, 0xff, 0x00);	/* page 0 */
571 572 573 574 575 576 577 578 579
	for (i = 0; i < 10; i++) {
		v = max[i];
		v += (sd->brightness - BRIGHTNESS_MAX)
			* 150 / BRIGHTNESS_MAX;		/* 200 ? */
		v -= delta[i] * sd->contrast / CONTRAST_MAX;
		if (v < 0)
			v = 0;
		else if (v > 0xff)
			v = 0xff;
580 581
		if (0 <= ret)
			ret = reg_w(gspca_dev, 0xa2 + i, v);
582
	}
583 584 585
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xdc, 0x01);
	return ret;
586 587 588
}

/* This function is used by pac7302 only */
589
static int setcolors(struct gspca_dev *gspca_dev)
590 591 592
{
	struct sd *sd = (struct sd *) gspca_dev;
	int i, v;
593
	int ret;
594 595 596 597 598
	static const int a[9] =
		{217, -212, 0, -101, 170, -67, -38, -315, 355};
	static const int b[9] =
		{19, 106, 0, 19, 106, 1, 19, 106, 1};

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	ret = reg_w(gspca_dev, 0xff, 0x03);	/* page 3 */
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x11, 0x01);
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xff, 0x00);	/* page 0 */
604 605
	for (i = 0; i < 9; i++) {
		v = a[i] * sd->colors / COLOR_MAX + b[i];
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		if (0 <= ret)
			ret = reg_w(gspca_dev, 0x0f + 2 * i, (v >> 8) & 0x07);
		if (0 <= ret)
			ret = reg_w(gspca_dev, 0x0f + 2 * i + 1, v);
610
	}
611 612
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xdc, 0x01);
613
	PDEBUG(D_CONF|D_STREAM, "color: %i", sd->colors);
614
	return ret;
615 616
}

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static int setwhitebalance(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int ret;

	ret = reg_w(gspca_dev, 0xff, 0x00);	/* page 0 */
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xc6, sd->white_balance);

	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xdc, 0x01);
	PDEBUG(D_CONF|D_STREAM, "white_balance: %i", sd->white_balance);
	return ret;
}

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static int setredbalance(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int ret;

	ret = reg_w(gspca_dev, 0xff, 0x00);	/* page 0 */
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xc5, sd->red_balance);

	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xdc, 0x01);
	PDEBUG(D_CONF|D_STREAM, "red_balance: %i", sd->red_balance);
	return ret;
}

static int setbluebalance(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int ret;

	ret = reg_w(gspca_dev, 0xff, 0x00);	/* page 0 */
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xc7, sd->blue_balance);

	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xdc, 0x01);
	PDEBUG(D_CONF|D_STREAM, "blue_balance: %i", sd->blue_balance);
	return ret;
}

662
static int setgain(struct gspca_dev *gspca_dev)
663 664
{
	struct sd *sd = (struct sd *) gspca_dev;
665
	int ret;
666

667 668 669
	ret = reg_w(gspca_dev, 0xff, 0x03);		/* page 3 */
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x10, sd->gain >> 3);
670 671

	/* load registers to sensor (Bit 0, auto clear) */
672 673 674
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x11, 0x01);
	return ret;
675 676
}

677
static int setexposure(struct gspca_dev *gspca_dev)
678 679
{
	struct sd *sd = (struct sd *) gspca_dev;
680
	int ret;
681 682 683 684 685 686 687 688 689 690 691 692 693 694 695
	__u8 reg;

	/* register 2 of frame 3/4 contains the clock divider configuring the
	   no fps according to the formula: 60 / reg. sd->exposure is the
	   desired exposure time in ms. */
	reg = 120 * sd->exposure / 1000;
	if (reg < 2)
		reg = 2;
	else if (reg > 63)
		reg = 63;

	/* On the pac7302 reg2 MUST be a multiple of 3, so round it to
	   the nearest multiple of 3, except when between 6 and 12? */
	if (reg < 6 || reg > 12)
		reg = ((reg + 1) / 3) * 3;
696 697 698
	ret = reg_w(gspca_dev, 0xff, 0x03);		/* page 3 */
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x02, reg);
699 700

	/* load registers to sensor (Bit 0, auto clear) */
701 702 703
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x11, 0x01);
	return ret;
704 705
}

706
static int sethvflip(struct gspca_dev *gspca_dev)
707 708
{
	struct sd *sd = (struct sd *) gspca_dev;
709
	int ret;
710 711 712 713 714 715 716 717
	u8 data, hflip, vflip;

	hflip = sd->hflip;
	if (sd->flags & FL_HFLIP)
		hflip = !hflip;
	vflip = sd->vflip;
	if (sd->flags & FL_VFLIP)
		vflip = !vflip;
718

719
	ret = reg_w(gspca_dev, 0xff, 0x03);		/* page 3 */
720
	data = (hflip ? 0x08 : 0x00) | (vflip ? 0x04 : 0x00);
721 722
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x21, data);
723
	/* load registers to sensor (Bit 0, auto clear) */
724 725 726
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x11, 0x01);
	return ret;
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}

/* this function is called at probe and resume time for pac7302 */
static int sd_init(struct gspca_dev *gspca_dev)
{
732
	return reg_w_seq(gspca_dev, init_7302, sizeof(init_7302)/2);
733 734 735 736 737
}

static int sd_start(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
738
	int ret = 0;
739 740 741

	sd->sof_read = 0;

742
	ret = reg_w_var(gspca_dev, start_7302,
743
		page3_7302, sizeof(page3_7302));
744 745 746 747
	if (0 <= ret)
		ret = setbrightcont(gspca_dev);
	if (0 <= ret)
		ret = setcolors(gspca_dev);
748 749
	if (0 <= ret)
		ret = setwhitebalance(gspca_dev);
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	if (0 <= ret)
		ret = setredbalance(gspca_dev);
	if (0 <= ret)
		ret = setbluebalance(gspca_dev);
754
	if (0 <= ret)
755
		ret = setgain(gspca_dev);
756
	if (0 <= ret)
757
		ret = setexposure(gspca_dev);
758
	if (0 <= ret)
759
		ret = sethvflip(gspca_dev);
760 761 762 763 764 765 766 767

	/* only resolution 640x480 is supported for pac7302 */

	sd->sof_read = 0;
	sd->autogain_ignore_frames = 0;
	atomic_set(&sd->avg_lum, -1);

	/* start stream */
768 769 770 771
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0xff, 0x01);
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x78, 0x01);
772

773
	return ret;
774 775 776 777
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
778 779
	int ret;

780
	/* stop stream */
781 782 783
	ret = reg_w(gspca_dev, 0xff, 0x01);
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x78, 0x00);
784 785 786 787 788
}

/* called on streamoff with alt 0 and on disconnect for pac7302 */
static void sd_stop0(struct gspca_dev *gspca_dev)
{
789 790
	int ret;

791 792
	if (!gspca_dev->present)
		return;
793 794 795
	ret = reg_w(gspca_dev, 0xff, 0x01);
	if (0 <= ret)
		ret = reg_w(gspca_dev, 0x78, 0x40);
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}

/* Include pac common sof detection functions */
#include "pac_common.h"

static void do_autogain(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int avg_lum = atomic_read(&sd->avg_lum);
	int desired_lum, deadzone;

	if (avg_lum == -1)
		return;

	desired_lum = 270 + sd->brightness * 4;
	/* Hack hack, with the 7202 the first exposure step is
	   pretty large, so if we're about to make the first
	   exposure increase make the deadzone large to avoid
	   oscilating */
	if (desired_lum > avg_lum && sd->gain == GAIN_DEF &&
			sd->exposure > EXPOSURE_DEF &&
			sd->exposure < 42)
		deadzone = 90;
	else
		deadzone = 30;

	if (sd->autogain_ignore_frames > 0)
		sd->autogain_ignore_frames--;
	else if (gspca_auto_gain_n_exposure(gspca_dev, avg_lum, desired_lum,
			deadzone, GAIN_KNEE, EXPOSURE_KNEE))
		sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
}

/* JPEG header, part 1 */
static const unsigned char pac_jpeg_header1[] = {
  0xff, 0xd8,		/* SOI: Start of Image */

  0xff, 0xc0,		/* SOF0: Start of Frame (Baseline DCT) */
  0x00, 0x11,		/* length = 17 bytes (including this length field) */
  0x08			/* Precision: 8 */
  /* 2 bytes is placed here: number of image lines */
  /* 2 bytes is placed here: samples per line */
};

/* JPEG header, continued */
static const unsigned char pac_jpeg_header2[] = {
  0x03,			/* Number of image components: 3 */
  0x01, 0x21, 0x00,	/* ID=1, Subsampling 1x1, Quantization table: 0 */
  0x02, 0x11, 0x01,	/* ID=2, Subsampling 2x1, Quantization table: 1 */
  0x03, 0x11, 0x01,	/* ID=3, Subsampling 2x1, Quantization table: 1 */

  0xff, 0xda,		/* SOS: Start Of Scan */
  0x00, 0x0c,		/* length = 12 bytes (including this length field) */
  0x03,			/* number of components: 3 */
  0x01, 0x00,		/* selector 1, table 0x00 */
  0x02, 0x11,		/* selector 2, table 0x11 */
  0x03, 0x11,		/* selector 3, table 0x11 */
  0x00, 0x3f,		/* Spectral selection: 0 .. 63 */
  0x00			/* Successive approximation: 0 */
};

static void pac_start_frame(struct gspca_dev *gspca_dev,
		struct gspca_frame *frame,
		__u16 lines, __u16 samples_per_line)
{
	unsigned char tmpbuf[4];

863
	gspca_frame_add(gspca_dev, FIRST_PACKET,
864 865 866 867 868 869 870
		pac_jpeg_header1, sizeof(pac_jpeg_header1));

	tmpbuf[0] = lines >> 8;
	tmpbuf[1] = lines & 0xff;
	tmpbuf[2] = samples_per_line >> 8;
	tmpbuf[3] = samples_per_line & 0xff;

871
	gspca_frame_add(gspca_dev, INTER_PACKET,
872
		tmpbuf, sizeof(tmpbuf));
873
	gspca_frame_add(gspca_dev, INTER_PACKET,
874 875 876 877 878
		pac_jpeg_header2, sizeof(pac_jpeg_header2));
}

/* this function is run at interrupt level */
static void sd_pkt_scan(struct gspca_dev *gspca_dev,
879
			u8 *data,			/* isoc packet */
880 881 882
			int len)			/* iso packet length */
{
	struct sd *sd = (struct sd *) gspca_dev;
883
	struct gspca_frame *frame;
884 885 886 887 888 889
	unsigned char *sof;

	sof = pac_find_sof(&sd->sof_read, data, len);
	if (sof) {
		int n, lum_offset, footer_length;

890 891 892 893 894 895
		frame = gspca_get_i_frame(gspca_dev);
		if (frame == NULL) {
			gspca_dev->last_packet_type = DISCARD_PACKET;
			return;
		}

896 897 898 899 900 901 902 903 904 905 906 907 908
		/* 6 bytes after the FF D9 EOF marker a number of lumination
		   bytes are send corresponding to different parts of the
		   image, the 14th and 15th byte after the EOF seem to
		   correspond to the center of the image */
		lum_offset = 61 + sizeof pac_sof_marker;
		footer_length = 74;

		/* Finish decoding current frame */
		n = (sof - data) - (footer_length + sizeof pac_sof_marker);
		if (n < 0) {
			frame->data_end += n;
			n = 0;
		}
909
		gspca_frame_add(gspca_dev, INTER_PACKET,
910 911 912 913
					data, n);
		if (gspca_dev->last_packet_type != DISCARD_PACKET &&
				frame->data_end[-2] == 0xff &&
				frame->data_end[-1] == 0xd9)
914
			gspca_frame_add(gspca_dev, LAST_PACKET,
915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933
						NULL, 0);

		n = sof - data;
		len -= n;
		data = sof;

		/* Get average lumination */
		if (gspca_dev->last_packet_type == LAST_PACKET &&
				n >= lum_offset)
			atomic_set(&sd->avg_lum, data[-lum_offset] +
						data[-lum_offset + 1]);
		else
			atomic_set(&sd->avg_lum, -1);

		/* Start the new frame with the jpeg header */
		/* The PAC7302 has the image rotated 90 degrees */
		pac_start_frame(gspca_dev, frame,
			gspca_dev->width, gspca_dev->height);
	}
934
	gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991
}

static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->brightness = val;
	if (gspca_dev->streaming)
		setbrightcont(gspca_dev);
	return 0;
}

static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->brightness;
	return 0;
}

static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->contrast = val;
	if (gspca_dev->streaming) {
		setbrightcont(gspca_dev);
	}
	return 0;
}

static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->contrast;
	return 0;
}

static int sd_setcolors(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->colors = val;
	if (gspca_dev->streaming)
		setcolors(gspca_dev);
	return 0;
}

static int sd_getcolors(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->colors;
	return 0;
}

992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012
static int sd_setwhitebalance(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int ret = 0;

	sd->white_balance = val;
	if (gspca_dev->streaming)
		ret = setwhitebalance(gspca_dev);
	if (0 <= ret)
		ret = 0;
	return ret;
}

static int sd_getwhitebalance(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->white_balance;
	return 0;
}

1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
static int sd_setredbalance(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int ret = 0;

	sd->red_balance = val;
	if (gspca_dev->streaming)
		ret = setredbalance(gspca_dev);
	if (0 <= ret)
		ret = 0;
	return ret;
}

static int sd_getredbalance(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->red_balance;
	return 0;
}

static int sd_setbluebalance(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int ret = 0;

	sd->blue_balance = val;
	if (gspca_dev->streaming)
		ret = setbluebalance(gspca_dev);
	if (0 <= ret)
		ret = 0;
	return ret;
}

static int sd_getbluebalance(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->blue_balance;
	return 0;
}

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static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->gain = val;
	if (gspca_dev->streaming)
		setgain(gspca_dev);
	return 0;
}

static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->gain;
	return 0;
}

static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->exposure = val;
	if (gspca_dev->streaming)
		setexposure(gspca_dev);
	return 0;
}

static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->exposure;
	return 0;
}

static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->autogain = val;
	/* when switching to autogain set defaults to make sure
	   we are on a valid point of the autogain gain /
	   exposure knee graph, and give this change time to
	   take effect before doing autogain. */
	if (sd->autogain) {
		sd->exposure = EXPOSURE_DEF;
		sd->gain = GAIN_DEF;
		if (gspca_dev->streaming) {
			sd->autogain_ignore_frames =
				PAC_AUTOGAIN_IGNORE_FRAMES;
			setexposure(gspca_dev);
			setgain(gspca_dev);
		}
	}

	return 0;
}

static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->autogain;
	return 0;
}

static int sd_sethflip(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->hflip = val;
	if (gspca_dev->streaming)
		sethvflip(gspca_dev);
	return 0;
}

static int sd_gethflip(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->hflip;
	return 0;
}

static int sd_setvflip(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->vflip = val;
	if (gspca_dev->streaming)
		sethvflip(gspca_dev);
	return 0;
}

static int sd_getvflip(struct gspca_dev *gspca_dev, __s32 *val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	*val = sd->vflip;
	return 0;
}

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#ifdef CONFIG_VIDEO_ADV_DEBUG
static int sd_dbg_s_register(struct gspca_dev *gspca_dev,
			struct v4l2_dbg_register *reg)
{
	int ret = -EINVAL;
	__u8 index;
	__u8 value;

	/* reg->reg: bit0..15: reserved for register index (wIndex is 16bit
			       long on the USB bus)
	*/
	if (reg->match.type == V4L2_CHIP_MATCH_HOST &&
	    reg->match.addr == 0 &&
	    (reg->reg < 0x000000ff) &&
	    (reg->val <= 0x000000ff)
	) {
		/* Currently writing to page 0 is only supported. */
		/* reg_w() only supports 8bit index */
		index = reg->reg & 0x000000ff;
		value = reg->val & 0x000000ff;

		/* Note that there shall be no access to other page
		   by any other function between the page swith and
		   the actual register write */
		ret = reg_w(gspca_dev, 0xff, 0x00);	/* page 0 */
		if (0 <= ret)
			ret = reg_w(gspca_dev, index, value);

		if (0 <= ret)
			ret = reg_w(gspca_dev, 0xdc, 0x01);
	}
	return ret;
}

static int sd_chip_ident(struct gspca_dev *gspca_dev,
			struct v4l2_dbg_chip_ident *chip)
{
	int ret = -EINVAL;

	if (chip->match.type == V4L2_CHIP_MATCH_HOST &&
	    chip->match.addr == 0) {
		chip->revision = 0;
		chip->ident = V4L2_IDENT_UNKNOWN;
		ret = 0;
	}
	return ret;
}
#endif

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/* sub-driver description for pac7302 */
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static const struct sd_desc sd_desc = {
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	.name = MODULE_NAME,
	.ctrls = sd_ctrls,
	.nctrls = ARRAY_SIZE(sd_ctrls),
	.config = sd_config,
	.init = sd_init,
	.start = sd_start,
	.stopN = sd_stopN,
	.stop0 = sd_stop0,
	.pkt_scan = sd_pkt_scan,
	.dq_callback = do_autogain,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
	.set_register = sd_dbg_s_register,
	.get_chip_ident = sd_chip_ident,
#endif
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};

/* -- module initialisation -- */
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static const struct usb_device_id device_table[] __devinitconst = {
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	{USB_DEVICE(0x06f8, 0x3009)},
	{USB_DEVICE(0x093a, 0x2620)},
	{USB_DEVICE(0x093a, 0x2621)},
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	{USB_DEVICE(0x093a, 0x2622), .driver_info = FL_VFLIP},
	{USB_DEVICE(0x093a, 0x2624), .driver_info = FL_VFLIP},
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	{USB_DEVICE(0x093a, 0x2626)},
	{USB_DEVICE(0x093a, 0x2628)},
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	{USB_DEVICE(0x093a, 0x2629), .driver_info = FL_VFLIP},
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	{USB_DEVICE(0x093a, 0x262a)},
	{USB_DEVICE(0x093a, 0x262c)},
	{}
};
MODULE_DEVICE_TABLE(usb, device_table);

/* -- device connect -- */
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static int __devinit sd_probe(struct usb_interface *intf,
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			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,
#endif
};

/* -- module insert / remove -- */
static int __init sd_mod_init(void)
{
	int ret;
	ret = usb_register(&sd_driver);
	if (ret < 0)
		return ret;
	PDEBUG(D_PROBE, "registered");
	return 0;
}
static void __exit sd_mod_exit(void)
{
	usb_deregister(&sd_driver);
	PDEBUG(D_PROBE, "deregistered");
}

module_init(sd_mod_init);
module_exit(sd_mod_exit);