V4L/DVB (7019): V4L: add support for Syntek DC1125 webcams (ec16dae5) · Commits · e / devices / android_kernel_teracube_emerald

drivers/media/video/Kconfig

+13 −0

Original line number	Diff line number	Diff line
		@@ -821,6 +821,19 @@ config USB_ZR364XX
		To compile this driver as a module, choose M here: the
		module will be called zr364xx.

		config USB_STKWEBCAM
		tristate "USB Syntek DC1125 Camera support"
		depends on VIDEO_V4L2 && EXPERIMENTAL
		---help---
		Say Y here if you want to use this type of camera.
		Supported devices are typically found in some Asus laptops,
		with USB id 174f:a311 and 05e1:0501. Other Syntek cameras
		may be supported by the stk11xx driver, from which this is
		derived, see http://stk11xx.sourceforge.net

		To compile this driver as a module, choose M here: the
		module will be called stkwebcam.

		endif # V4L_USB_DRIVERS

		endif # VIDEO_CAPTURE_DRIVERS

drivers/media/video/Makefile

+3 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,8 @@ tuner-objs := tuner-core.o tuner-types.o

		msp3400-objs := msp3400-driver.o msp3400-kthreads.o

		stkwebcam-objs := stk-webcam.o stk-sensor.o

		obj-$(CONFIG_VIDEO_DEV) += videodev.o v4l2-common.o compat_ioctl32.o \
		v4l2-int-device.o

		@@ -116,6 +118,7 @@ obj-$(CONFIG_USB_SE401) += se401.o
		obj-$(CONFIG_USB_STV680) += stv680.o
		obj-$(CONFIG_USB_W9968CF) += w9968cf.o
		obj-$(CONFIG_USB_ZR364XX) += zr364xx.o
		obj-$(CONFIG_USB_STKWEBCAM) += stkwebcam.o

		obj-$(CONFIG_USB_SN9C102) += sn9c102/
		obj-$(CONFIG_USB_ET61X251) += et61x251/

drivers/media/video/stk-sensor.c

0 → 100644

+578 −0

Original line number	Diff line number	Diff line
		/* stk-sensor.c: Driver for ov96xx sensor (used in some Syntek webcams)
		*
		* Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
		*
		* Some parts derived from ov7670.c:
		* Copyright 2006 One Laptop Per Child Association, Inc. Written
		* by Jonathan Corbet with substantial inspiration from Mark
		* McClelland's ovcamchip code.
		*
		* Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
		*
		* This file may be distributed under the terms of the GNU General
		* 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
		* (at your option) 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., 675 Mass Ave, Cambridge, MA 02139, USA.
		*/

		/* Controlling the sensor via the STK1125 vendor specific control interface:
		* The camera uses an OmniVision sensor and the stk1125 provides an
		* SCCB(i2c)-USB bridge which let us program the sensor.
		* In my case the sensor id is 0x9652, it can be read from sensor's register
		* 0x0A and 0x0B as follows:
		* - read register #R:
		* output #R to index 0x0208
		* output 0x0070 to index 0x0200
		* input 1 byte from index 0x0201 (some kind of status register)
		* until its value is 0x01
		* input 1 byte from index 0x0209. This is the value of #R
		* - write value V to register #R
		* output #R to index 0x0204
		* output V to index 0x0205
		* output 0x0005 to index 0x0200
		* input 1 byte from index 0x0201 until its value becomes 0x04
		*/

		/* It seems the i2c bus is controlled with these registers */

		#include "stk-webcam.h"

		#define STK_IIC_BASE (0x0200)
		# define STK_IIC_OP (STK_IIC_BASE)
		# define STK_IIC_OP_TX (0x05)
		# define STK_IIC_OP_RX (0x70)
		# define STK_IIC_STAT (STK_IIC_BASE+1)
		# define STK_IIC_STAT_TX_OK (0x04)
		# define STK_IIC_STAT_RX_OK (0x01)
		/* I don't know what does this register.
		* when it is 0x00 or 0x01, we cannot talk to the sensor,
		* other values work */
		# define STK_IIC_ENABLE (STK_IIC_BASE+2)
		# define STK_IIC_ENABLE_NO (0x00)
		/* This is what the driver writes in windows */
		# define STK_IIC_ENABLE_YES (0x1e)
		/*
		* Address of the slave. Seems like the binary driver look for the
		* sensor in multiple places, attempting a reset sequence.
		* We only know about the ov9650
		*/
		# define STK_IIC_ADDR (STK_IIC_BASE+3)
		# define STK_IIC_TX_INDEX (STK_IIC_BASE+4)
		# define STK_IIC_TX_VALUE (STK_IIC_BASE+5)
		# define STK_IIC_RX_INDEX (STK_IIC_BASE+8)
		# define STK_IIC_RX_VALUE (STK_IIC_BASE+9)

		#define MAX_RETRIES (50)

		#define SENSOR_ADDRESS (0x60)

		/* From ov7670.c (These registers aren't fully accurate) */

		/* Registers */
		#define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */
		#define REG_BLUE 0x01 /* blue gain */
		#define REG_RED 0x02 /* red gain */
		#define REG_VREF 0x03 /* Pieces of GAIN, VSTART, VSTOP */
		#define REG_COM1 0x04 /* Control 1 */
		#define COM1_CCIR656 0x40 /* CCIR656 enable */
		#define COM1_QFMT 0x20 /* QVGA/QCIF format */
		#define COM1_SKIP_0 0x00 /* Do not skip any row */
		#define COM1_SKIP_2 0x04 /* Skip 2 rows of 4 */
		#define COM1_SKIP_3 0x08 /* Skip 3 rows of 4 */
		#define REG_BAVE 0x05 /* U/B Average level */
		#define REG_GbAVE 0x06 /* Y/Gb Average level */
		#define REG_AECHH 0x07 /* AEC MS 5 bits */
		#define REG_RAVE 0x08 /* V/R Average level */
		#define REG_COM2 0x09 /* Control 2 */
		#define COM2_SSLEEP 0x10 /* Soft sleep mode */
		#define REG_PID 0x0a /* Product ID MSB */
		#define REG_VER 0x0b /* Product ID LSB */
		#define REG_COM3 0x0c /* Control 3 */
		#define COM3_SWAP 0x40 /* Byte swap */
		#define COM3_SCALEEN 0x08 /* Enable scaling */
		#define COM3_DCWEN 0x04 /* Enable downsamp/crop/window */
		#define REG_COM4 0x0d /* Control 4 */
		#define REG_COM5 0x0e /* All "reserved" */
		#define REG_COM6 0x0f /* Control 6 */
		#define REG_AECH 0x10 /* More bits of AEC value */
		#define REG_CLKRC 0x11 /* Clock control */
		#define CLK_PLL 0x80 /* Enable internal PLL */
		#define CLK_EXT 0x40 /* Use external clock directly */
		#define CLK_SCALE 0x3f /* Mask for internal clock scale */
		#define REG_COM7 0x12 /* Control 7 */
		#define COM7_RESET 0x80 /* Register reset */
		#define COM7_FMT_MASK 0x38
		#define COM7_FMT_SXGA 0x00
		#define COM7_FMT_VGA 0x40
		#define COM7_FMT_CIF 0x20 /* CIF format */
		#define COM7_FMT_QVGA 0x10 /* QVGA format */
		#define COM7_FMT_QCIF 0x08 /* QCIF format */
		#define COM7_RGB 0x04 /* bits 0 and 2 - RGB format */
		#define COM7_YUV 0x00 /* YUV */
		#define COM7_BAYER 0x01 /* Bayer format */
		#define COM7_PBAYER 0x05 /* "Processed bayer" */
		#define REG_COM8 0x13 /* Control 8 */
		#define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */
		#define COM8_AECSTEP 0x40 /* Unlimited AEC step size */
		#define COM8_BFILT 0x20 /* Band filter enable */
		#define COM8_AGC 0x04 /* Auto gain enable */
		#define COM8_AWB 0x02 /* White balance enable */
		#define COM8_AEC 0x01 /* Auto exposure enable */
		#define REG_COM9 0x14 /* Control 9 - gain ceiling */
		#define REG_COM10 0x15 /* Control 10 */
		#define COM10_HSYNC 0x40 /* HSYNC instead of HREF */
		#define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */
		#define COM10_HREF_REV 0x08 /* Reverse HREF */
		#define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */
		#define COM10_VS_NEG 0x02 /* VSYNC negative */
		#define COM10_HS_NEG 0x01 /* HSYNC negative */
		#define REG_HSTART 0x17 /* Horiz start high bits */
		#define REG_HSTOP 0x18 /* Horiz stop high bits */
		#define REG_VSTART 0x19 /* Vert start high bits */
		#define REG_VSTOP 0x1a /* Vert stop high bits */
		#define REG_PSHFT 0x1b /* Pixel delay after HREF */
		#define REG_MIDH 0x1c /* Manuf. ID high */
		#define REG_MIDL 0x1d /* Manuf. ID low */
		#define REG_MVFP 0x1e /* Mirror / vflip */
		#define MVFP_MIRROR 0x20 /* Mirror image */
		#define MVFP_FLIP 0x10 /* Vertical flip */

		#define REG_AEW 0x24 /* AGC upper limit */
		#define REG_AEB 0x25 /* AGC lower limit */
		#define REG_VPT 0x26 /* AGC/AEC fast mode op region */
		#define REG_ADVFL 0x2d /* Insert dummy lines (LSB) */
		#define REG_ADVFH 0x2e /* Insert dummy lines (MSB) */
		#define REG_HSYST 0x30 /* HSYNC rising edge delay */
		#define REG_HSYEN 0x31 /* HSYNC falling edge delay */
		#define REG_HREF 0x32 /* HREF pieces */
		#define REG_TSLB 0x3a /* lots of stuff */
		#define TSLB_YLAST 0x04 /* UYVY or VYUY - see com13 */
		#define TSLB_BYTEORD 0x08 /* swap bytes in 16bit mode? */
		#define REG_COM11 0x3b /* Control 11 */
		#define COM11_NIGHT 0x80 /* NIght mode enable */
		#define COM11_NMFR 0x60 /* Two bit NM frame rate */
		#define COM11_HZAUTO 0x10 /* Auto detect 50/60 Hz */
		#define COM11_50HZ 0x08 /* Manual 50Hz select */
		#define COM11_EXP 0x02
		#define REG_COM12 0x3c /* Control 12 */
		#define COM12_HREF 0x80 /* HREF always */
		#define REG_COM13 0x3d /* Control 13 */
		#define COM13_GAMMA 0x80 /* Gamma enable */
		#define COM13_UVSAT 0x40 /* UV saturation auto adjustment */
		#define COM13_CMATRIX 0x10 /* Enable color matrix for RGB or YUV */
		#define COM13_UVSWAP 0x01 /* V before U - w/TSLB */
		#define REG_COM14 0x3e /* Control 14 */
		#define COM14_DCWEN 0x10 /* DCW/PCLK-scale enable */
		#define REG_EDGE 0x3f /* Edge enhancement factor */
		#define REG_COM15 0x40 /* Control 15 */
		#define COM15_R10F0 0x00 /* Data range 10 to F0 */
		#define COM15_R01FE 0x80 /* 01 to FE */
		#define COM15_R00FF 0xc0 /* 00 to FF */
		#define COM15_RGB565 0x10 /* RGB565 output */
		#define COM15_RGBFIXME 0x20 /* FIXME */
		#define COM15_RGB555 0x30 /* RGB555 output */
		#define REG_COM16 0x41 /* Control 16 */
		#define COM16_AWBGAIN 0x08 /* AWB gain enable */
		#define REG_COM17 0x42 /* Control 17 */
		#define COM17_AECWIN 0xc0 /* AEC window - must match COM4 */
		#define COM17_CBAR 0x08 /* DSP Color bar */

		/*
		* This matrix defines how the colors are generated, must be
		* tweaked to adjust hue and saturation.
		*
		* Order: v-red, v-green, v-blue, u-red, u-green, u-blue
		*
		* They are nine-bit signed quantities, with the sign bit
		* stored in 0x58. Sign for v-red is bit 0, and up from there.
		*/
		#define REG_CMATRIX_BASE 0x4f
		#define CMATRIX_LEN 6
		#define REG_CMATRIX_SIGN 0x58


		#define REG_BRIGHT 0x55 /* Brightness */
		#define REG_CONTRAS 0x56 /* Contrast control */

		#define REG_GFIX 0x69 /* Fix gain control */

		#define REG_RGB444 0x8c /* RGB 444 control */
		#define R444_ENABLE 0x02 /* Turn on RGB444, overrides 5x5 */
		#define R444_RGBX 0x01 /* Empty nibble at end */

		#define REG_HAECC1 0x9f /* Hist AEC/AGC control 1 */
		#define REG_HAECC2 0xa0 /* Hist AEC/AGC control 2 */

		#define REG_BD50MAX 0xa5 /* 50hz banding step limit */
		#define REG_HAECC3 0xa6 /* Hist AEC/AGC control 3 */
		#define REG_HAECC4 0xa7 /* Hist AEC/AGC control 4 */
		#define REG_HAECC5 0xa8 /* Hist AEC/AGC control 5 */
		#define REG_HAECC6 0xa9 /* Hist AEC/AGC control 6 */
		#define REG_HAECC7 0xaa /* Hist AEC/AGC control 7 */
		#define REG_BD60MAX 0xab /* 60hz banding step limit */




		/* Returns 0 if OK */
		int stk_sensor_outb(struct stk_camera *dev, u8 reg, u8 val)
		{
		int i = 0;
		int tmpval = 0;

		if (stk_camera_write_reg(dev, STK_IIC_TX_INDEX, reg))
		return 1;
		if (stk_camera_write_reg(dev, STK_IIC_TX_VALUE, val))
		return 1;
		if (stk_camera_write_reg(dev, STK_IIC_OP, STK_IIC_OP_TX))
		return 1;
		do {
		if (stk_camera_read_reg(dev, STK_IIC_STAT, &tmpval))
		return 1;
		i++;
		} while (tmpval == 0 && i < MAX_RETRIES);
		if (tmpval != STK_IIC_STAT_TX_OK) {
		if (tmpval)
		STK_ERROR("stk_sensor_outb failed, status=0x%02x\n",
		tmpval);
		return 1;
		} else
		return 0;
		}

		int stk_sensor_inb(struct stk_camera dev, u8 reg, u8 val)
		{
		int i = 0;
		int tmpval = 0;

		if (stk_camera_write_reg(dev, STK_IIC_RX_INDEX, reg))
		return 1;
		if (stk_camera_write_reg(dev, STK_IIC_OP, STK_IIC_OP_RX))
		return 1;
		do {
		if (stk_camera_read_reg(dev, STK_IIC_STAT, &tmpval))
		return 1;
		i++;
		} while (tmpval == 0 && i < MAX_RETRIES);
		if (tmpval != STK_IIC_STAT_RX_OK) {
		if (tmpval)
		STK_ERROR("stk_sensor_inb failed, status=0x%02x\n",
		tmpval);
		return 1;
		}

		if (stk_camera_read_reg(dev, STK_IIC_RX_VALUE, &tmpval))
		return 1;

		*val = (u8) tmpval;
		return 0;
		}

		static int stk_sensor_write_regvals(struct stk_camera *dev,
		struct regval *rv)
		{
		int ret;
		if (rv == NULL)
		return 0;
		while (rv->reg != 0xff \|\| rv->val != 0xff) {
		ret = stk_sensor_outb(dev, rv->reg, rv->val);
		if (ret != 0)
		return ret;
		rv++;
		}
		return 0;
		}

		int stk_sensor_sleep(struct stk_camera *dev)
		{
		u8 tmp;
		return stk_sensor_inb(dev, REG_COM2, &tmp)
		\|\| stk_sensor_outb(dev, REG_COM2, tmp\|COM2_SSLEEP);
		}

		int stk_sensor_wakeup(struct stk_camera *dev)
		{
		u8 tmp;
		return stk_sensor_inb(dev, REG_COM2, &tmp)
		\|\| stk_sensor_outb(dev, REG_COM2, tmp&~COM2_SSLEEP);
		}

		static struct regval ov_initvals[] = {
		{REG_CLKRC, CLK_PLL},
		{REG_COM11, 0x01},
		{0x6a, 0x7d},
		{REG_AECH, 0x40},
		{REG_GAIN, 0x00},
		{REG_BLUE, 0x80},
		{REG_RED, 0x80},
		/* Do not enable fast AEC for now */
		/{REG_COM8, COM8_FASTAEC\|COM8_AECSTEP\|COM8_BFILT\|COM8_AGC\|COM8_AEC},/
		{REG_COM8, COM8_AECSTEP\|COM8_BFILT\|COM8_AGC\|COM8_AEC},
		{0x39, 0x50}, {0x38, 0x93},
		{0x37, 0x00}, {0x35, 0x81},
		{REG_COM5, 0x20},
		{REG_COM1, 0x00},
		{REG_COM3, 0x00},
		{REG_COM4, 0x00},
		{REG_PSHFT, 0x00},
		{0x16, 0x07},
		{0x33, 0xe2}, {0x34, 0xbf},
		{REG_COM16, 0x00},
		{0x96, 0x04},
		/* Gamma curve values */
		/* { 0x7a, 0x20 }, { 0x7b, 0x10 },
		{ 0x7c, 0x1e }, { 0x7d, 0x35 },
		{ 0x7e, 0x5a }, { 0x7f, 0x69 },
		{ 0x80, 0x76 }, { 0x81, 0x80 },
		{ 0x82, 0x88 }, { 0x83, 0x8f },
		{ 0x84, 0x96 }, { 0x85, 0xa3 },
		{ 0x86, 0xaf }, { 0x87, 0xc4 },
		{ 0x88, 0xd7 }, { 0x89, 0xe8 },
		*/
		{REG_GFIX, 0x40},
		{0x8e, 0x00},
		{REG_COM12, 0x73},
		{0x8f, 0xdf}, {0x8b, 0x06},
		{0x8c, 0x20},
		{0x94, 0x88}, {0x95, 0x88},
		/* {REG_COM15, 0xc1}, TODO */
		{0x29, 0x3f},
		{REG_COM6, 0x42},
		{REG_BD50MAX, 0x80},
		{REG_HAECC6, 0xb8}, {REG_HAECC7, 0x92},
		{REG_BD60MAX, 0x0a},
		{0x90, 0x00}, {0x91, 0x00},
		{REG_HAECC1, 0x00}, {REG_HAECC2, 0x00},
		{REG_AEW, 0x68}, {REG_AEB, 0x5c},
		{REG_VPT, 0xc3},
		{REG_COM9, 0x2e},
		{0x2a, 0x00}, {0x2b, 0x00},

		{0xff, 0xff}, /* END MARKER */
		};

		/* Probe the I2C bus and initialise the sensor chip */
		int stk_sensor_init(struct stk_camera *dev)
		{
		u8 idl = 0;
		u8 idh = 0;

		if (stk_camera_write_reg(dev, STK_IIC_ENABLE, STK_IIC_ENABLE_YES)
		\|\| stk_camera_write_reg(dev, STK_IIC_ADDR, SENSOR_ADDRESS)
		\|\| stk_sensor_outb(dev, REG_COM7, COM7_RESET)) {
		STK_ERROR("Sensor resetting failed\n");
		return -ENODEV;
		}
		msleep(10);
		/* Read the manufacturer ID: ov = 0x7FA2 */
		if (stk_sensor_inb(dev, REG_MIDH, &idh)
		\|\| stk_sensor_inb(dev, REG_MIDL, &idl)) {
		STK_ERROR("Strange error reading sensor ID\n");
		return -ENODEV;
		}
		if (idh != 0x7F \|\| idl != 0xA2) {
		STK_ERROR("Huh? you don't have a sensor from ovt\n");
		return -ENODEV;
		}
		if (stk_sensor_inb(dev, REG_PID, &idh)
		\|\| stk_sensor_inb(dev, REG_VER, &idl)) {
		STK_ERROR("Could not read sensor model\n");
		return -ENODEV;
		}
		stk_sensor_write_regvals(dev, ov_initvals);
		msleep(10);
		STK_INFO("OmniVision sensor detected, id %02X%02X"
		" at address %x\n", idh, idl, SENSOR_ADDRESS);
		return 0;
		}

		/* V4L2_PIX_FMT_UYVY */
		static struct regval ov_fmt_uyvy[] = {
		{REG_TSLB, TSLB_YLAST\|0x08 },
		{ 0x4f, 0x80 }, /* "matrix coefficient 1" */
		{ 0x50, 0x80 }, /* "matrix coefficient 2" */
		{ 0x51, 0 }, /* vb */
		{ 0x52, 0x22 }, /* "matrix coefficient 4" */
		{ 0x53, 0x5e }, /* "matrix coefficient 5" */
		{ 0x54, 0x80 }, /* "matrix coefficient 6" */
		{REG_COM13, COM13_UVSAT\|COM13_CMATRIX},
		{REG_COM15, COM15_R00FF },
		{0xff, 0xff}, /* END MARKER */
		};

		/* V4L2_PIX_FMT_RGB565X rrrrrggg gggbbbbb */
		static struct regval ov_fmt_rgbr[] = {
		{ REG_RGB444, 0 }, /* No RGB444 please */
		{REG_TSLB, 0x00},
		{ REG_COM1, 0x0 },
		{ REG_COM9, 0x38 }, /* 16x gain ceiling; 0x8 is reserved bit */
		{ 0x4f, 0xb3 }, /* "matrix coefficient 1" */
		{ 0x50, 0xb3 }, /* "matrix coefficient 2" */
		{ 0x51, 0 }, /* vb */
		{ 0x52, 0x3d }, /* "matrix coefficient 4" */
		{ 0x53, 0xa7 }, /* "matrix coefficient 5" */
		{ 0x54, 0xe4 }, /* "matrix coefficient 6" */
		{ REG_COM13, COM13_GAMMA },
		{ REG_COM15, COM15_RGB565\|COM15_R00FF },
		{ 0xff, 0xff },
		};

		/* V4L2_PIX_FMT_RGB565 gggbbbbb rrrrrggg */
		static struct regval ov_fmt_rgbp[] = {
		{ REG_RGB444, 0 }, /* No RGB444 please */
		{REG_TSLB, TSLB_BYTEORD },
		{ REG_COM1, 0x0 },
		{ REG_COM9, 0x38 }, /* 16x gain ceiling; 0x8 is reserved bit */
		{ 0x4f, 0xb3 }, /* "matrix coefficient 1" */
		{ 0x50, 0xb3 }, /* "matrix coefficient 2" */
		{ 0x51, 0 }, /* vb */
		{ 0x52, 0x3d }, /* "matrix coefficient 4" */
		{ 0x53, 0xa7 }, /* "matrix coefficient 5" */
		{ 0x54, 0xe4 }, /* "matrix coefficient 6" */
		{ REG_COM13, COM13_GAMMA },
		{ REG_COM15, COM15_RGB565\|COM15_R00FF },
		{ 0xff, 0xff },
		};

		/* V4L2_PIX_FMT_SRGGB8 */
		static struct regval ov_fmt_bayer[] = {
		/* This changes color order */
		{REG_TSLB, 0x40}, /* BGGR */
		/* {REG_TSLB, 0x08}, / / BGGR with vertical image flipping */
		{REG_COM15, COM15_R00FF },
		{0xff, 0xff}, /* END MARKER */
		};
		/*
		* Store a set of start/stop values into the camera.
		*/
		static int stk_sensor_set_hw(struct stk_camera *dev,
		int hstart, int hstop, int vstart, int vstop)
		{
		int ret;
		unsigned char v;
		/*
		* Horizontal: 11 bits, top 8 live in hstart and hstop. Bottom 3 of
		* hstart are in href[2:0], bottom 3 of hstop in href[5:3]. There is
		* a mystery "edge offset" value in the top two bits of href.
		*/
		ret = stk_sensor_outb(dev, REG_HSTART, (hstart >> 3) & 0xff);
		ret += stk_sensor_outb(dev, REG_HSTOP, (hstop >> 3) & 0xff);
		ret += stk_sensor_inb(dev, REG_HREF, &v);
		v = (v & 0xc0) \| ((hstop & 0x7) << 3) \| (hstart & 0x7);
		msleep(10);
		ret += stk_sensor_outb(dev, REG_HREF, v);
		/*
		* Vertical: similar arrangement (note: this is different from ov7670.c)
		*/
		ret += stk_sensor_outb(dev, REG_VSTART, (vstart >> 3) & 0xff);
		ret += stk_sensor_outb(dev, REG_VSTOP, (vstop >> 3) & 0xff);
		ret += stk_sensor_inb(dev, REG_VREF, &v);
		v = (v & 0xc0) \| ((vstop & 0x7) << 3) \| (vstart & 0x7);
		msleep(10);
		ret += stk_sensor_outb(dev, REG_VREF, v);
		return ret;
		}


		int stk_sensor_configure(struct stk_camera *dev)
		{
		int com7;
		/*
		* We setup the sensor to output dummy lines in low-res modes,
		* so we don't get absurdly hight framerates.
		*/
		unsigned dummylines;
		int flip;
		struct regval *rv;

		switch (dev->vsettings.mode) {
		case MODE_QCIF: com7 = COM7_FMT_QCIF;
		dummylines = 604;
		break;
		case MODE_QVGA: com7 = COM7_FMT_QVGA;
		dummylines = 267;
		break;
		case MODE_CIF: com7 = COM7_FMT_CIF;
		dummylines = 412;
		break;
		case MODE_VGA: com7 = COM7_FMT_VGA;
		dummylines = 11;
		break;
		case MODE_SXGA: com7 = COM7_FMT_SXGA;
		dummylines = 0;
		break;
		default: STK_ERROR("Unsupported mode %d\n", dev->vsettings.mode);
		return -EFAULT;
		}
		switch (dev->vsettings.palette) {
		case V4L2_PIX_FMT_UYVY:
		com7 \|= COM7_YUV;
		rv = ov_fmt_uyvy;
		break;
		case V4L2_PIX_FMT_RGB565:
		com7 \|= COM7_RGB;
		rv = ov_fmt_rgbp;
		break;
		case V4L2_PIX_FMT_RGB565X:
		com7 \|= COM7_RGB;
		rv = ov_fmt_rgbr;
		break;
		case V4L2_PIX_FMT_SBGGR8:
		com7 \|= COM7_PBAYER;
		rv = ov_fmt_bayer;
		break;
		default: STK_ERROR("Unsupported colorspace\n");
		return -EFAULT;
		}
		/*FIXME sometimes the sensor go to a bad state
		stk_sensor_write_regvals(dev, ov_initvals); */
		stk_sensor_outb(dev, REG_COM7, com7);
		msleep(50);
		stk_sensor_write_regvals(dev, rv);
		flip = (dev->vsettings.vflip?MVFP_FLIP:0)
		\| (dev->vsettings.hflip?MVFP_MIRROR:0);
		stk_sensor_outb(dev, REG_MVFP, flip);
		if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8
		&& !dev->vsettings.vflip)
		stk_sensor_outb(dev, REG_TSLB, 0x08);
		stk_sensor_outb(dev, REG_ADVFH, dummylines >> 8);
		stk_sensor_outb(dev, REG_ADVFL, dummylines & 0xff);
		msleep(50);
		switch (dev->vsettings.mode) {
		case MODE_VGA:
		if (stk_sensor_set_hw(dev, 302, 1582, 6, 486))
		STK_ERROR("stk_sensor_set_hw failed (VGA)\n");
		break;
		case MODE_SXGA:
		case MODE_CIF:
		case MODE_QVGA:
		case MODE_QCIF:
		/*FIXME These settings seem ignored by the sensor
		if (stk_sensor_set_hw(dev, 220, 1500, 10, 1034))
		STK_ERROR("stk_sensor_set_hw failed (SXGA)\n");
		*/
		break;
		}
		msleep(10);
		return 0;
		}

		int stk_sensor_set_brightness(struct stk_camera *dev, int br)
		{
		if (br < 0 \|\| br > 0xff)
		return -EINVAL;
		stk_sensor_outb(dev, REG_AEB, max(0x00, br - 6));
		stk_sensor_outb(dev, REG_AEW, min(0xff, br + 6));
		return 0;
		}

drivers/media/video/stk-webcam.c

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drivers/media/video/stk-webcam.h

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Original line number	Diff line number	Diff line
		/*
		* stk-webcam.h : Driver for Syntek 1125 USB webcam controller
		*
		* Copyright (C) 2006 Nicolas VIVIEN
		* Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
		*
		* 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
		*/

		#ifndef STKWEBCAM_H
		#define STKWEBCAM_H

		#include <linux/usb.h>
		#include <media/v4l2-common.h>

		#define DRIVER_VERSION "v0.0.1"
		#define DRIVER_VERSION_NUM 0x000001

		#define MAX_ISO_BUFS 3
		#define ISO_FRAMES_PER_DESC 16
		#define ISO_MAX_FRAME_SIZE 3 * 1024
		#define ISO_BUFFER_SIZE (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)


		#define PREFIX "stkwebcam: "
		#define STK_INFO(str, args...) printk(KERN_INFO PREFIX str, ##args)
		#define STK_ERROR(str, args...) printk(KERN_ERR PREFIX str, ##args)
		#define STK_WARNING(str, args...) printk(KERN_WARNING PREFIX str, ##args)

		struct stk_iso_buf {
		void *data;
		int length;
		int read;
		struct urb *urb;
		};

		/* Streaming IO buffers */
		struct stk_sio_buffer {
		struct v4l2_buffer v4lbuf;
		char *buffer;
		int mapcount;
		struct stk_camera *dev;
		struct list_head list;
		};

		enum stk_mode {MODE_VGA, MODE_SXGA, MODE_CIF, MODE_QVGA, MODE_QCIF};

		struct stk_video {
		enum stk_mode mode;
		int brightness;
		__u32 palette;
		int hflip;
		int vflip;
		};

		enum stk_status {
		S_PRESENT = 1,
		S_INITIALISED = 2,
		S_MEMALLOCD = 4,
		S_STREAMING = 8,
		};
		#define is_present(dev) ((dev)->status & S_PRESENT)
		#define is_initialised(dev) ((dev)->status & S_INITIALISED)
		#define is_streaming(dev) ((dev)->status & S_STREAMING)
		#define is_memallocd(dev) ((dev)->status & S_MEMALLOCD)
		#define set_present(dev) ((dev)->status = S_PRESENT)
		#define unset_present(dev) ((dev)->status &= \
		~(S_PRESENT\|S_INITIALISED\|S_STREAMING))
		#define set_initialised(dev) ((dev)->status \|= S_INITIALISED)
		#define set_memallocd(dev) ((dev)->status \|= S_MEMALLOCD)
		#define unset_memallocd(dev) ((dev)->status &= ~S_MEMALLOCD)
		#define set_streaming(dev) ((dev)->status \|= S_STREAMING)
		#define unset_streaming(dev) ((dev)->status &= ~S_STREAMING)

		struct regval {
		unsigned reg;
		unsigned val;
		};

		struct stk_camera {
		struct video_device vdev;
		struct usb_device *udev;
		struct usb_interface *interface;
		int webcam_model;
		struct file *owner;

		u8 isoc_ep;

		struct kref kref;
		/* Not sure if this is right */
		atomic_t urbs_used;

		struct stk_video vsettings;

		enum stk_status status;

		spinlock_t spinlock;
		wait_queue_head_t wait_frame;

		struct stk_iso_buf *isobufs;

		int frame_size;
		/* Streaming buffers */
		unsigned int n_sbufs;
		struct stk_sio_buffer *sio_bufs;
		struct list_head sio_avail;
		struct list_head sio_full;
		unsigned sequence;
		};

		#define to_stk_camera(d) container_of(d, struct stk_camera, kref)
		#define vdev_to_camera(d) container_of(d, struct stk_camera, vdev)

		void stk_camera_delete(struct kref *);
		int stk_camera_write_reg(struct stk_camera *, u16, u8);
		int stk_camera_read_reg(struct stk_camera , u16, int );

		int stk_sensor_outb(struct stk_camera *dev, u8 reg, u8 val);
		int stk_sensor_inb(struct stk_camera dev, u8 reg, u8 val);
		int stk_sensor_init(struct stk_camera *);
		int stk_sensor_configure(struct stk_camera *);
		int stk_sensor_sleep(struct stk_camera *dev);
		int stk_sensor_wakeup(struct stk_camera *dev);
		int stk_sensor_set_brightness(struct stk_camera *dev, int br);

		#endif