stk-sensor.c

trident tm5600的linux驱动

	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_YUYV */
static struct regval ov_fmt_yuyv[] = {
	{REG_TSLB, 0 },
	{ 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_YUYV:
		com7 |= COM7_YUV;
		rv = ov_fmt_yuyv;
		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;
}