mt9v022.c

trident tm5600的linux驱动

{
	struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);

	if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
		return -EINVAL;

	if (reg->match_chip != mt9v022->client->addr)
		return -ENODEV;

	reg->val = reg_read(icd, reg->reg);

	if (reg->val > 0xffff)
		return -EIO;

	return 0;
}

static int mt9v022_set_register(struct soc_camera_device *icd,
				struct v4l2_register *reg)
{
	struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);

	if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
		return -EINVAL;

	if (reg->match_chip != mt9v022->client->addr)
		return -ENODEV;

	if (reg_write(icd, reg->reg, reg->val) < 0)
		return -EIO;

	return 0;
}
#endif

static const struct v4l2_queryctrl mt9v022_controls[] = {
	{
		.id		= V4L2_CID_VFLIP,
		.type		= V4L2_CTRL_TYPE_BOOLEAN,
		.name		= "Flip Vertically",
		.minimum	= 0,
		.maximum	= 1,
		.step		= 1,
		.default_value	= 0,
	}, {
		.id		= V4L2_CID_HFLIP,
		.type		= V4L2_CTRL_TYPE_BOOLEAN,
		.name		= "Flip Horizontally",
		.minimum	= 0,
		.maximum	= 1,
		.step		= 1,
		.default_value	= 0,
	}, {
		.id		= V4L2_CID_GAIN,
		.type		= V4L2_CTRL_TYPE_INTEGER,
		.name		= "Analog Gain",
		.minimum	= 64,
		.maximum	= 127,
		.step		= 1,
		.default_value	= 64,
		.flags		= V4L2_CTRL_FLAG_SLIDER,
	}, {
		.id		= V4L2_CID_EXPOSURE,
		.type		= V4L2_CTRL_TYPE_INTEGER,
		.name		= "Exposure",
		.minimum	= 1,
		.maximum	= 255,
		.step		= 1,
		.default_value	= 255,
		.flags		= V4L2_CTRL_FLAG_SLIDER,
	}, {
		.id		= V4L2_CID_AUTOGAIN,
		.type		= V4L2_CTRL_TYPE_BOOLEAN,
		.name		= "Automatic Gain",
		.minimum	= 0,
		.maximum	= 1,
		.step		= 1,
		.default_value	= 1,
	}, {
		.id		= V4L2_CID_EXPOSURE_AUTO,
		.type		= V4L2_CTRL_TYPE_BOOLEAN,
		.name		= "Automatic Exposure",
		.minimum	= 0,
		.maximum	= 1,
		.step		= 1,
		.default_value	= 1,
	}
};

static int mt9v022_video_probe(struct soc_camera_device *);
static void mt9v022_video_remove(struct soc_camera_device *);
static int mt9v022_get_control(struct soc_camera_device *, struct v4l2_control *);
static int mt9v022_set_control(struct soc_camera_device *, struct v4l2_control *);

static struct soc_camera_ops mt9v022_ops = {
	.owner			= THIS_MODULE,
	.probe			= mt9v022_video_probe,
	.remove			= mt9v022_video_remove,
	.init			= mt9v022_init,
	.release		= mt9v022_release,
	.start_capture		= mt9v022_start_capture,
	.stop_capture		= mt9v022_stop_capture,
	.set_fmt_cap		= mt9v022_set_fmt_cap,
	.try_fmt_cap		= mt9v022_try_fmt_cap,
	.set_bus_param		= mt9v022_set_bus_param,
	.query_bus_param	= mt9v022_query_bus_param,
	.controls		= mt9v022_controls,
	.num_controls		= ARRAY_SIZE(mt9v022_controls),
	.get_control		= mt9v022_get_control,
	.set_control		= mt9v022_set_control,
	.get_chip_id		= mt9v022_get_chip_id,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.get_register		= mt9v022_get_register,
	.set_register		= mt9v022_set_register,
#endif
};

static int mt9v022_get_control(struct soc_camera_device *icd,
			       struct v4l2_control *ctrl)
{
	int data;

	switch (ctrl->id) {
	case V4L2_CID_VFLIP:
		data = reg_read(icd, MT9V022_READ_MODE);
		if (data < 0)
			return -EIO;
		ctrl->value = !!(data & 0x10);
		break;
	case V4L2_CID_HFLIP:
		data = reg_read(icd, MT9V022_READ_MODE);
		if (data < 0)
			return -EIO;
		ctrl->value = !!(data & 0x20);
		break;
	case V4L2_CID_EXPOSURE_AUTO:
		data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
		if (data < 0)
			return -EIO;
		ctrl->value = !!(data & 0x1);
		break;
	case V4L2_CID_AUTOGAIN:
		data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
		if (data < 0)
			return -EIO;
		ctrl->value = !!(data & 0x2);
		break;
	}
	return 0;
}

static int mt9v022_set_control(struct soc_camera_device *icd,
			       struct v4l2_control *ctrl)
{
	int data;
	const struct v4l2_queryctrl *qctrl;

	qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);

	if (!qctrl)
		return -EINVAL;

	switch (ctrl->id) {
	case V4L2_CID_VFLIP:
		if (ctrl->value)
			data = reg_set(icd, MT9V022_READ_MODE, 0x10);
		else
			data = reg_clear(icd, MT9V022_READ_MODE, 0x10);
		if (data < 0)
			return -EIO;
		break;
	case V4L2_CID_HFLIP:
		if (ctrl->value)
			data = reg_set(icd, MT9V022_READ_MODE, 0x20);
		else
			data = reg_clear(icd, MT9V022_READ_MODE, 0x20);
		if (data < 0)
			return -EIO;
		break;
	case V4L2_CID_GAIN:
		/* mt9v022 has minimum == default */
		if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
			return -EINVAL;
		else {
			unsigned long range = qctrl->maximum - qctrl->minimum;
			/* Datasheet says 16 to 64. autogain only works properly
			 * after setting gain to maximum 14. Larger values
			 * produce "white fly" noise effect. On the whole,
			 * manually setting analog gain does no good. */
			unsigned long gain = ((ctrl->value - qctrl->minimum) *
					      10 + range / 2) / range + 4;
			if (gain >= 32)
				gain &= ~1;
			/* The user wants to set gain manually, hope, she
			 * knows, what she's doing... Switch AGC off. */

			if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
				return -EIO;

			dev_info(&icd->dev, "Setting gain from %d to %lu\n",
				 reg_read(icd, MT9V022_ANALOG_GAIN), gain);
			if (reg_write(icd, MT9V022_ANALOG_GAIN, gain) < 0)
				return -EIO;
			icd->gain = ctrl->value;
		}
		break;
	case V4L2_CID_EXPOSURE:
		/* mt9v022 has maximum == default */
		if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
			return -EINVAL;
		else {
			unsigned long range = qctrl->maximum - qctrl->minimum;
			unsigned long shutter = ((ctrl->value - qctrl->minimum) *
						 479 + range / 2) / range + 1;
			/* The user wants to set shutter width manually, hope,
			 * she knows, what she's doing... Switch AEC off. */

			if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
				return -EIO;

			dev_dbg(&icd->dev, "Shutter width from %d to %lu\n",
				reg_read(icd, MT9V022_TOTAL_SHUTTER_WIDTH),
				shutter);
			if (reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH,
				      shutter) < 0)
				return -EIO;
			icd->exposure = ctrl->value;
		}
		break;
	case V4L2_CID_AUTOGAIN:
		if (ctrl->value)
			data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
		else
			data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
		if (data < 0)
			return -EIO;
		break;
	case V4L2_CID_EXPOSURE_AUTO:
		if (ctrl->value)
			data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
		else
			data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
		if (data < 0)
			return -EIO;
		break;
	}
	return 0;
}

/* Interface active, can use i2c. If it fails, it can indeed mean, that
 * this wasn't our capture interface, so, we wait for the right one */
static int mt9v022_video_probe(struct soc_camera_device *icd)
{
	struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
	s32 data;
	int ret;

	if (!icd->dev.parent ||
	    to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
		return -ENODEV;

	/* Read out the chip version register */
	data = reg_read(icd, MT9V022_CHIP_VERSION);

	/* must be 0x1311 or 0x1313 */
	if (data != 0x1311 && data != 0x1313) {
		ret = -ENODEV;
		dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n",
			 data);
		goto ei2c;
	}

	/* Soft reset */
	ret = reg_write(icd, MT9V022_RESET, 1);
	if (ret < 0)
		goto ei2c;
	/* 15 clock cycles */
	udelay(200);
	if (reg_read(icd, MT9V022_RESET)) {
		dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
		goto ei2c;
	}

	/* Set monochrome or colour sensor type */
	if (sensor_type && (!strcmp("colour", sensor_type) ||
			    !strcmp("color", sensor_type))) {
		ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
		mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
		icd->formats = mt9v022_colour_formats;
		if (mt9v022->client->dev.platform_data)
			icd->num_formats = ARRAY_SIZE(mt9v022_colour_formats);
		else
			icd->num_formats = 1;
	} else {
		ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11);
		mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
		icd->formats = mt9v022_monochrome_formats;
		if (mt9v022->client->dev.platform_data)
			icd->num_formats = ARRAY_SIZE(mt9v022_monochrome_formats);
		else
			icd->num_formats = 1;
	}

	if (!ret)
		ret = soc_camera_video_start(icd);
	if (ret < 0)
		goto eisis;

	dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
		 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
		 "monochrome" : "colour");

	return 0;

eisis:
ei2c:
	return ret;
}

static void mt9v022_video_remove(struct soc_camera_device *icd)
{
	struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);

	dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9v022->client->addr,
		mt9v022->icd.dev.parent, mt9v022->icd.vdev);
	soc_camera_video_stop(&mt9v022->icd);
}

static int mt9v022_probe(struct i2c_client *client,
			 const struct i2c_device_id *did)
{
	struct mt9v022 *mt9v022;
	struct soc_camera_device *icd;
	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
	struct soc_camera_link *icl = client->dev.platform_data;
	int ret;

	if (!icl) {
		dev_err(&client->dev, "MT9V022 driver needs platform data\n");
		return -EINVAL;
	}

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
		dev_warn(&adapter->dev,
			 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
		return -EIO;
	}

	mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
	if (!mt9v022)
		return -ENOMEM;

	mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
	mt9v022->client = client;
	i2c_set_clientdata(client, mt9v022);

	icd = &mt9v022->icd;
	icd->ops	= &mt9v022_ops;
	icd->control	= &client->dev;
	icd->x_min	= 1;
	icd->y_min	= 4;
	icd->x_current	= 1;
	icd->y_current	= 4;
	icd->width_min	= 48;
	icd->width_max	= 752;
	icd->height_min	= 32;
	icd->height_max	= 480;
	icd->y_skip_top	= 1;
	icd->iface	= icl->bus_id;
	/* Default datawidth - this is the only width this camera (normally)
	 * supports. It is only with extra logic that it can support
	 * other widths. Therefore it seems to be a sensible default. */
	mt9v022->datawidth = 10;

	ret = bus_switch_request(mt9v022, icl);
	if (ret)
		goto eswinit;

	ret = soc_camera_device_register(icd);
	if (ret)
		goto eisdr;

	return 0;

eisdr:
	bus_switch_release(mt9v022);
eswinit:
	kfree(mt9v022);
	return ret;
}

static int mt9v022_remove(struct i2c_client *client)
{
	struct mt9v022 *mt9v022 = i2c_get_clientdata(client);

	soc_camera_device_unregister(&mt9v022->icd);
	bus_switch_release(mt9v022);
	kfree(mt9v022);

	return 0;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
static const struct i2c_device_id mt9v022_id[] = {
	{ "mt9v022", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, mt9v022_id);
#endif

static struct i2c_driver mt9v022_i2c_driver = {
	.driver = {
		.name = "mt9v022",
	},
	.probe		= mt9v022_probe,
	.remove		= mt9v022_remove,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
	.id_table	= mt9v022_id,
#endif
};

static int __init mt9v022_mod_init(void)
{
	return i2c_add_driver(&mt9v022_i2c_driver);
}

static void __exit mt9v022_mod_exit(void)
{
	i2c_del_driver(&mt9v022_i2c_driver);
}

module_init(mt9v022_mod_init);
module_exit(mt9v022_mod_exit);

MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
MODULE_AUTHOR("Guennadi Liakhovetski <[e-mail]>");
MODULE_LICENSE("GPL");