pac7302.c 31.3 KB
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/*
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 * Pixart PAC7302 driver
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 *
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 * Copyright (C) 2008-2012 Jean-Francois Moine <http://moinejf.free.fr>
 * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
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 *
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 * Separated from Pixart PAC7311 library by Márton Németh
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 * Camera button input handling by Márton Németh <nm127@freemail.hu>
 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
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 *
 * 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.

   Register page 1:

   Address	Description
   0x78		Global control, bit 6 controls the LED (inverted)

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   Register page 3:
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   Address	Description
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   0x02		Clock divider 3-63, fps = 90 / val. Must be a multiple of 3 on
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		the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
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   0x03		Variable framerate ctrl reg2==3: 0 -> ~30 fps, 255 -> ~22fps
   0x04		Another var framerate ctrl reg2==3, reg3==0: 0 -> ~30 fps,
		63 -> ~27 fps, the 2 msb's must always be 1 !!
   0x05		Another var framerate ctrl reg2==3, reg3==0, reg4==0xc0:
		1 -> ~30 fps, 2 -> ~20 fps
   0x0e		Exposure bits 0-7, 0-448, 0 = use full frame time
   0x0f		Exposure bit 8, 0-448, 448 = no exposure at all
   0x10		Master gain 0-31
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   0x21		Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
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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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*/

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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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

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MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>, "
		"Thomas Kaiser thomas@kaiser-linux.li");
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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 autogain;
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	unsigned short exposure;
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	__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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	{
	    {
		.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,
	},
	{
	    {
		.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,
	},
	{
	    {
		.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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	{
	    {
		.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,
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		.maximum = 1023,
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		.step    = 1,
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#define EXPOSURE_DEF  66  /*  33 ms / 30 fps */
#define EXPOSURE_KNEE 133 /*  66 ms / 15 fps */
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		.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,
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	},
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};

#define LOAD_PAGE3		255
#define END_OF_SEQUENCE		0

/* pac 7302 */
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static const u8 init_7302[] = {
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/*	index,value */
	0xff, 0x01,		/* page 1 */
	0x78, 0x00,		/* deactivate */
	0xff, 0x01,
	0x78, 0x40,		/* led off */
};
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static const u8 start_7302[] = {
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/*	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,
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	0x62, 4,	0x10, 0x1e, 0x1e, 0x18,
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	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() */
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static const u8 page3_7302[] = {
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	0x90, 0x40, 0x03, 0x00, 0xc0, 0x01, 0x14, 0x16,
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	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 void reg_w_buf(struct gspca_dev *gspca_dev,
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		u8 index,
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		  const u8 *buffer, int len)
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{
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	int ret;

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	if (gspca_dev->usb_err < 0)
		return;
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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),
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			0,		/* request */
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			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) {
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		pr_err("reg_w_buf failed i: %02x error %d\n",
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		       index, ret);
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		gspca_dev->usb_err = ret;
	}
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}


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static void reg_w(struct gspca_dev *gspca_dev,
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		u8 index,
		u8 value)
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{
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	int ret;

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	if (gspca_dev->usb_err < 0)
		return;
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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) {
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		pr_err("reg_w() failed i: %02x v: %02x error %d\n",
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		       index, value, ret);
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		gspca_dev->usb_err = ret;
	}
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}

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static void reg_w_seq(struct gspca_dev *gspca_dev,
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		const u8 *seq, int len)
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{
	while (--len >= 0) {
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		reg_w(gspca_dev, seq[0], seq[1]);
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		seq += 2;
	}
}

/* load the beginning of a page */
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static void reg_w_page(struct gspca_dev *gspca_dev,
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			const u8 *page, int len)
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{
	int index;
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	int ret = 0;
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	if (gspca_dev->usb_err < 0)
		return;
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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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			pr_err("reg_w_page() failed i: %02x v: %02x error %d\n",
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			       index, page[index], ret);
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			gspca_dev->usb_err = ret;
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			break;
		}
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	}
}

/* output a variable sequence */
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static void reg_w_var(struct gspca_dev *gspca_dev,
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			const u8 *seq,
			const u8 *page3, unsigned int page3_len)
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{
	int index, len;

	for (;;) {
		index = *seq++;
		len = *seq++;
		switch (len) {
		case END_OF_SEQUENCE:
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			return;
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		case LOAD_PAGE3:
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			reg_w_page(gspca_dev, page3, page3_len);
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			break;
		default:
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#ifdef GSPCA_DEBUG
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			if (len > USB_BUF_SZ) {
				PDEBUG(D_ERR|D_STREAM,
					"Incorrect variable sequence");
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				return;
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			}
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#endif
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			while (len > 0) {
				if (len < 8) {
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					reg_w_buf(gspca_dev,
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						index, seq, len);
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					seq += len;
					break;
				}
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				reg_w_buf(gspca_dev, index, seq, 8);
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				seq += 8;
				index += 8;
				len -= 8;
			}
		}
	}
	/* 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;

	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;
534
	sd->white_balance = WHITEBALANCE_DEF;
535 536
	sd->red_balance = REDBALANCE_DEF;
	sd->blue_balance = BLUEBALANCE_DEF;
537 538 539 540 541
	sd->gain = GAIN_DEF;
	sd->exposure = EXPOSURE_DEF;
	sd->autogain = AUTOGAIN_DEF;
	sd->hflip = HFLIP_DEF;
	sd->vflip = VFLIP_DEF;
542
	sd->flags = id->driver_info;
543 544 545 546
	return 0;
}

/* This function is used by pac7302 only */
547
static void setbrightcont(struct gspca_dev *gspca_dev)
548 549 550
{
	struct sd *sd = (struct sd *) gspca_dev;
	int i, v;
551
	static const u8 max[10] =
552 553
		{0x29, 0x33, 0x42, 0x5a, 0x6e, 0x80, 0x9f, 0xbb,
		 0xd4, 0xec};
554
	static const u8 delta[10] =
555 556 557
		{0x35, 0x33, 0x33, 0x2f, 0x2a, 0x25, 0x1e, 0x17,
		 0x11, 0x0b};

558
	reg_w(gspca_dev, 0xff, 0x00);		/* page 0 */
559 560 561 562 563 564 565 566 567
	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;
568
		reg_w(gspca_dev, 0xa2 + i, v);
569
	}
570
	reg_w(gspca_dev, 0xdc, 0x01);
571 572 573
}

/* This function is used by pac7302 only */
574
static void setcolors(struct gspca_dev *gspca_dev)
575 576 577 578 579 580 581 582
{
	struct sd *sd = (struct sd *) gspca_dev;
	int i, v;
	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};

583 584 585
	reg_w(gspca_dev, 0xff, 0x03);			/* page 3 */
	reg_w(gspca_dev, 0x11, 0x01);
	reg_w(gspca_dev, 0xff, 0x00);			/* page 0 */
586 587
	for (i = 0; i < 9; i++) {
		v = a[i] * sd->colors / COLOR_MAX + b[i];
588 589
		reg_w(gspca_dev, 0x0f + 2 * i, (v >> 8) & 0x07);
		reg_w(gspca_dev, 0x0f + 2 * i + 1, v);
590
	}
591
	reg_w(gspca_dev, 0xdc, 0x01);
592 593
}

594
static void setwhitebalance(struct gspca_dev *gspca_dev)
595 596 597
{
	struct sd *sd = (struct sd *) gspca_dev;

598 599
	reg_w(gspca_dev, 0xff, 0x00);		/* page 0 */
	reg_w(gspca_dev, 0xc6, sd->white_balance);
600

601
	reg_w(gspca_dev, 0xdc, 0x01);
602 603
}

604
static void setredbalance(struct gspca_dev *gspca_dev)
605 606 607
{
	struct sd *sd = (struct sd *) gspca_dev;

608 609
	reg_w(gspca_dev, 0xff, 0x00);		/* page 0 */
	reg_w(gspca_dev, 0xc5, sd->red_balance);
610

611
	reg_w(gspca_dev, 0xdc, 0x01);
612 613
}

614
static void setbluebalance(struct gspca_dev *gspca_dev)
615 616 617
{
	struct sd *sd = (struct sd *) gspca_dev;

618 619
	reg_w(gspca_dev, 0xff, 0x00);			/* page 0 */
	reg_w(gspca_dev, 0xc7, sd->blue_balance);
620

621
	reg_w(gspca_dev, 0xdc, 0x01);
622 623
}

624
static void setgain(struct gspca_dev *gspca_dev)
625 626 627
{
	struct sd *sd = (struct sd *) gspca_dev;

628 629
	reg_w(gspca_dev, 0xff, 0x03);			/* page 3 */
	reg_w(gspca_dev, 0x10, sd->gain >> 3);
630 631

	/* load registers to sensor (Bit 0, auto clear) */
632
	reg_w(gspca_dev, 0x11, 0x01);
633 634
}

635
static void setexposure(struct gspca_dev *gspca_dev)
636 637
{
	struct sd *sd = (struct sd *) gspca_dev;
638 639
	u8 clockdiv;
	u16 exposure;
640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666

	/* register 2 of frame 3 contains the clock divider configuring the
	   no fps according to the formula: 90 / reg. sd->exposure is the
	   desired exposure time in 0.5 ms. */
	clockdiv = (90 * sd->exposure + 1999) / 2000;

	/* Note clockdiv = 3 also works, but when running at 30 fps, depending
	   on the scene being recorded, the camera switches to another
	   quantization table for certain JPEG blocks, and we don't know how
	   to decompress these blocks. So we cap the framerate at 15 fps */
	if (clockdiv < 6)
		clockdiv = 6;
	else if (clockdiv > 63)
		clockdiv = 63;

	/* reg2 MUST be a multiple of 3, except when between 6 and 12?
	   Always round up, otherwise we cannot get the desired frametime
	   using the partial frame time exposure control */
	if (clockdiv < 6 || clockdiv > 12)
		clockdiv = ((clockdiv + 2) / 3) * 3;

	/* frame exposure time in ms = 1000 * clockdiv / 90    ->
	exposure = (sd->exposure / 2) * 448 / (1000 * clockdiv / 90) */
	exposure = (sd->exposure * 45 * 448) / (1000 * clockdiv);
	/* 0 = use full frametime, 448 = no exposure, reverse it */
	exposure = 448 - exposure;

667
	reg_w(gspca_dev, 0xff, 0x03);			/* page 3 */
668 669 670
	reg_w(gspca_dev, 0x02, clockdiv);
	reg_w(gspca_dev, 0x0e, exposure & 0xff);
	reg_w(gspca_dev, 0x0f, exposure >> 8);
671 672

	/* load registers to sensor (Bit 0, auto clear) */
673
	reg_w(gspca_dev, 0x11, 0x01);
674 675
}

676
static void sethvflip(struct gspca_dev *gspca_dev)
677 678
{
	struct sd *sd = (struct sd *) gspca_dev;
679 680 681 682 683 684 685 686
	u8 data, hflip, vflip;

	hflip = sd->hflip;
	if (sd->flags & FL_HFLIP)
		hflip = !hflip;
	vflip = sd->vflip;
	if (sd->flags & FL_VFLIP)
		vflip = !vflip;
687

688
	reg_w(gspca_dev, 0xff, 0x03);			/* page 3 */
689
	data = (hflip ? 0x08 : 0x00) | (vflip ? 0x04 : 0x00);
690 691
	reg_w(gspca_dev, 0x21, data);

692
	/* load registers to sensor (Bit 0, auto clear) */
693
	reg_w(gspca_dev, 0x11, 0x01);
694 695 696 697 698
}

/* this function is called at probe and resume time for pac7302 */
static int sd_init(struct gspca_dev *gspca_dev)
{
699 700
	reg_w_seq(gspca_dev, init_7302, sizeof(init_7302)/2);
	return gspca_dev->usb_err;
701 702 703 704 705 706
}

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

707
	reg_w_var(gspca_dev, start_7302,
708
		page3_7302, sizeof(page3_7302));
709 710 711 712 713 714 715 716
	setbrightcont(gspca_dev);
	setcolors(gspca_dev);
	setwhitebalance(gspca_dev);
	setredbalance(gspca_dev);
	setbluebalance(gspca_dev);
	setgain(gspca_dev);
	setexposure(gspca_dev);
	sethvflip(gspca_dev);
717 718 719 720 721 722 723 724

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

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

	/* start stream */
725 726
	reg_w(gspca_dev, 0xff, 0x01);
	reg_w(gspca_dev, 0x78, 0x01);
727

728
	return gspca_dev->usb_err;
729 730 731 732
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
733

734
	/* stop stream */
735 736
	reg_w(gspca_dev, 0xff, 0x01);
	reg_w(gspca_dev, 0x78, 0x00);
737 738 739 740 741 742 743
}

/* called on streamoff with alt 0 and on disconnect for pac7302 */
static void sd_stop0(struct gspca_dev *gspca_dev)
{
	if (!gspca_dev->present)
		return;
744 745
	reg_w(gspca_dev, 0xff, 0x01);
	reg_w(gspca_dev, 0x78, 0x40);
746 747 748 749 750 751 752 753 754
}

/* 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);
755 756
	int desired_lum;
	const int deadzone = 30;
757 758 759 760

	if (avg_lum == -1)
		return;

761
	desired_lum = 270 + sd->brightness;
762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802

	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,
		__u16 lines, __u16 samples_per_line)
{
	unsigned char tmpbuf[4];

803
	gspca_frame_add(gspca_dev, FIRST_PACKET,
804 805 806 807 808 809 810
		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;

811
	gspca_frame_add(gspca_dev, INTER_PACKET,
812
		tmpbuf, sizeof(tmpbuf));
813
	gspca_frame_add(gspca_dev, INTER_PACKET,
814 815 816 817 818
		pac_jpeg_header2, sizeof(pac_jpeg_header2));
}

/* this function is run at interrupt level */
static void sd_pkt_scan(struct gspca_dev *gspca_dev,
819
			u8 *data,			/* isoc packet */
820 821 822
			int len)			/* iso packet length */
{
	struct sd *sd = (struct sd *) gspca_dev;
823
	u8 *image;
824
	u8 *sof;
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839

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

		/* 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) {
840
			gspca_dev->image_len += n;
841
			n = 0;
842 843
		} else {
			gspca_frame_add(gspca_dev, INTER_PACKET, data, n);
844
		}
845 846 847

		image = gspca_dev->image;
		if (image != NULL
848 849 850
		 && image[gspca_dev->image_len - 2] == 0xff
		 && image[gspca_dev->image_len - 1] == 0xd9)
			gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
851 852 853 854 855 856 857 858 859 860 861 862 863 864 865

		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 */
866
		pac_start_frame(gspca_dev,
867 868
			gspca_dev->width, gspca_dev->height);
	}
869
	gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
870 871 872 873 874 875 876 877 878
}

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);
879
	return gspca_dev->usb_err;
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894
}

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;
895
	if (gspca_dev->streaming)
896
		setbrightcont(gspca_dev);
897
	return gspca_dev->usb_err;
898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914
}

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);
915
	return gspca_dev->usb_err;
916 917 918 919 920 921 922 923 924 925
}

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

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

926 927 928 929 930 931
static int sd_setwhitebalance(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->white_balance = val;
	if (gspca_dev->streaming)
932 933
		setwhitebalance(gspca_dev);
	return gspca_dev->usb_err;
934 935 936 937 938 939 940 941 942 943
}

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

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

944 945 946 947 948 949
static int sd_setredbalance(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;

	sd->red_balance = val;
	if (gspca_dev->streaming)
950 951
		setredbalance(gspca_dev);
	return gspca_dev->usb_err;
952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967
}

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;

	sd->blue_balance = val;
	if (gspca_dev->streaming)
968 969
		setbluebalance(gspca_dev);
	return gspca_dev->usb_err;
970 971 972 973 974 975 976 977 978 979
}

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

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

980 981 982 983 984 985 986
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);
987
	return gspca_dev->usb_err;
988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
}

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);
1005
	return gspca_dev->usb_err;
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035
}

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);
		}
	}

1036
	return gspca_dev->usb_err;
1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053
}

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);
1054
	return gspca_dev->usb_err;
1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
}

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);
1072
	return gspca_dev->usb_err;
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
}

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

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

1083 1084 1085 1086
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int sd_dbg_s_register(struct gspca_dev *gspca_dev,
			struct v4l2_dbg_register *reg)
{
1087 1088
	u8 index;
	u8 value;
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099

	/* 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 */
1100 1101
		index = reg->reg;
		value = reg->val;
1102 1103 1104 1105

		/* Note that there shall be no access to other page
		   by any other function between the page swith and
		   the actual register write */
1106 1107
		reg_w(gspca_dev, 0xff, 0x00);		/* page 0 */
		reg_w(gspca_dev, index, value);
1108

1109
		reg_w(gspca_dev, 0xdc, 0x01);
1110
	}
1111
	return gspca_dev->usb_err;
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128
}

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

1129
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159
static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
			u8 *data,		/* interrupt packet data */
			int len)		/* interrput packet length */
{
	int ret = -EINVAL;
	u8 data0, data1;

	if (len == 2) {
		data0 = data[0];
		data1 = data[1];
		if ((data0 == 0x00 && data1 == 0x11) ||
		    (data0 == 0x22 && data1 == 0x33) ||
		    (data0 == 0x44 && data1 == 0x55) ||
		    (data0 == 0x66 && data1 == 0x77) ||
		    (data0 == 0x88 && data1 == 0x99) ||
		    (data0 == 0xaa && data1 == 0xbb) ||
		    (data0 == 0xcc && data1 == 0xdd) ||
		    (data0 == 0xee && data1 == 0xff)) {
			input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
			input_sync(gspca_dev->input_dev);
			input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
			input_sync(gspca_dev->input_dev);
			ret = 0;
		}
	}

	return ret;
}
#endif

1160
/* sub-driver description for pac7302 */
1161
static const struct sd_desc sd_desc = {
1162
	.name = KBUILD_MODNAME,
1163 1164 1165 1166 1167 1168 1169 1170 1171
	.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,
1172 1173 1174 1175
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.set_register = sd_dbg_s_register,
	.get_chip_ident = sd_chip_ident,
#endif
1176
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
1177 1178
	.int_pkt_scan = sd_int_pkt_scan,
#endif
1179 1180 1181
};

/* -- module initialisation -- */
1182
static const struct usb_device_id device_table[] = {
1183
	{USB_DEVICE(0x06f8, 0x3009)},
1184
	{USB_DEVICE(0x06f8, 0x301b)},
1185 1186
	{USB_DEVICE(0x093a, 0x2620)},
	{USB_DEVICE(0x093a, 0x2621)},
1187 1188
	{USB_DEVICE(0x093a, 0x2622), .driver_info = FL_VFLIP},
	{USB_DEVICE(0x093a, 0x2624), .driver_info = FL_VFLIP},
1189
	{USB_DEVICE(0x093a, 0x2625)},
1190 1191
	{USB_DEVICE(0x093a, 0x2626)},
	{USB_DEVICE(0x093a, 0x2628)},
1192
	{USB_DEVICE(0x093a, 0x2629), .driver_info = FL_VFLIP},
1193 1194
	{USB_DEVICE(0x093a, 0x262a)},
	{USB_DEVICE(0x093a, 0x262c)},
1195
	{USB_DEVICE(0x145f, 0x013c)},
1196 1197 1198 1199 1200
	{}
};
MODULE_DEVICE_TABLE(usb, device_table);

/* -- device connect -- */
1201
static int sd_probe(struct usb_interface *intf,
1202 1203 1204 1205 1206 1207 1208
			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 = {
1209
	.name = KBUILD_MODNAME,
1210 1211 1212 1213 1214 1215 1216 1217 1218
	.id_table = device_table,
	.probe = sd_probe,
	.disconnect = gspca_disconnect,
#ifdef CONFIG_PM
	.suspend = gspca_suspend,
	.resume = gspca_resume,
#endif
};

1219
module_usb_driver(sd_driver);