mt9m111.c

trident tm5600的linux驱动

	if (id->match_type != V4L2_CHIP_MATCH_I2C_ADDR)
		return -EINVAL;

	if (id->match_chip != mt9m111->client->addr)
		return -ENODEV;

	id->ident	= mt9m111->model;
	id->revision	= 0;

	return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int mt9m111_get_register(struct soc_camera_device *icd,
				struct v4l2_register *reg)
{
	int val;

	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);

	if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x2ff)
		return -EINVAL;
	if (reg->match_chip != mt9m111->client->addr)
		return -ENODEV;

	val = mt9m111_reg_read(icd, reg->reg);
	reg->val = (u64)val;

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

	return 0;
}

static int mt9m111_set_register(struct soc_camera_device *icd,
				struct v4l2_register *reg)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);

	if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x2ff)
		return -EINVAL;

	if (reg->match_chip != mt9m111->client->addr)
		return -ENODEV;

	if (mt9m111_reg_write(icd, reg->reg, reg->val) < 0)
		return -EIO;

	return 0;
}
#endif

static const struct v4l2_queryctrl mt9m111_controls[] = {
	{
		.id		= V4L2_CID_VFLIP,
		.type		= V4L2_CTRL_TYPE_BOOLEAN,
		.name		= "Flip Verticaly",
		.minimum	= 0,
		.maximum	= 1,
		.step		= 1,
		.default_value	= 0,
	}, {
		.id		= V4L2_CID_HFLIP,
		.type		= V4L2_CTRL_TYPE_BOOLEAN,
		.name		= "Flip Horizontaly",
		.minimum	= 0,
		.maximum	= 1,
		.step		= 1,
		.default_value	= 0,
	}, {	/* gain = 1/32*val (=>gain=1 if val==32) */
		.id		= V4L2_CID_GAIN,
		.type		= V4L2_CTRL_TYPE_INTEGER,
		.name		= "Gain",
		.minimum	= 0,
		.maximum	= 63 * 2 * 2,
		.step		= 1,
		.default_value	= 32,
		.flags		= V4L2_CTRL_FLAG_SLIDER,
	}, {
		.id		= V4L2_CID_EXPOSURE_AUTO,
		.type		= V4L2_CTRL_TYPE_BOOLEAN,
		.name		= "Auto Exposure",
		.minimum	= 0,
		.maximum	= 1,
		.step		= 1,
		.default_value	= 1,
	}
};

static int mt9m111_video_probe(struct soc_camera_device *);
static void mt9m111_video_remove(struct soc_camera_device *);
static int mt9m111_get_control(struct soc_camera_device *,
			       struct v4l2_control *);
static int mt9m111_set_control(struct soc_camera_device *,
			       struct v4l2_control *);
static int mt9m111_resume(struct soc_camera_device *icd);
static int mt9m111_init(struct soc_camera_device *icd);
static int mt9m111_release(struct soc_camera_device *icd);

static struct soc_camera_ops mt9m111_ops = {
	.owner			= THIS_MODULE,
	.probe			= mt9m111_video_probe,
	.remove			= mt9m111_video_remove,
	.init			= mt9m111_init,
	.resume			= mt9m111_resume,
	.release		= mt9m111_release,
	.start_capture		= mt9m111_start_capture,
	.stop_capture		= mt9m111_stop_capture,
	.set_fmt_cap		= mt9m111_set_fmt_cap,
	.try_fmt_cap		= mt9m111_try_fmt_cap,
	.query_bus_param	= mt9m111_query_bus_param,
	.set_bus_param		= mt9m111_set_bus_param,
	.controls		= mt9m111_controls,
	.num_controls		= ARRAY_SIZE(mt9m111_controls),
	.get_control		= mt9m111_get_control,
	.set_control		= mt9m111_set_control,
	.get_chip_id		= mt9m111_get_chip_id,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.get_register		= mt9m111_get_register,
	.set_register		= mt9m111_set_register,
#endif
};

static int mt9m111_set_flip(struct soc_camera_device *icd, int flip, int mask)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int ret;

	if (mt9m111->context == HIGHPOWER) {
		if (flip)
			ret = reg_set(READ_MODE_B, mask);
		else
			ret = reg_clear(READ_MODE_B, mask);
	} else {
		if (flip)
			ret = reg_set(READ_MODE_A, mask);
		else
			ret = reg_clear(READ_MODE_A, mask);
	}

	return ret;
}

static int mt9m111_get_global_gain(struct soc_camera_device *icd)
{
	unsigned int data, gain;

	data = reg_read(GLOBAL_GAIN);
	if (data >= 0)
		gain = ((data & (1 << 10)) * 2)
			| ((data & (1 << 9)) * 2)
			| (data & 0x2f);
	else
		gain = data;

	return gain;
}
static int mt9m111_set_global_gain(struct soc_camera_device *icd, int gain)
{
	u16 val;

	if (gain > 63 * 2 * 2)
		return -EINVAL;

	icd->gain = gain;
	if ((gain >= 64 * 2) && (gain < 63 * 2 * 2))
		val = (1 << 10) | (1 << 9) | (gain / 4);
	else if ((gain >= 64) && (gain < 64 * 2))
		val = (1 << 9) | (gain / 2);
	else
		val = gain;

	return reg_write(GLOBAL_GAIN, val);
}

static int mt9m111_set_autoexposure(struct soc_camera_device *icd, int on)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int ret;

	if (on)
		ret = reg_set(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOEXPO_EN);
	else
		ret = reg_clear(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOEXPO_EN);

	if (!ret)
		mt9m111->autoexposure = on;

	return ret;
}
static int mt9m111_get_control(struct soc_camera_device *icd,
			       struct v4l2_control *ctrl)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int data;

	switch (ctrl->id) {
	case V4L2_CID_VFLIP:
		if (mt9m111->context == HIGHPOWER)
			data = reg_read(READ_MODE_B);
		else
			data = reg_read(READ_MODE_A);

		if (data < 0)
			return -EIO;
		ctrl->value = !!(data & MT9M111_RMB_MIRROR_ROWS);
		break;
	case V4L2_CID_HFLIP:
		if (mt9m111->context == HIGHPOWER)
			data = reg_read(READ_MODE_B);
		else
			data = reg_read(READ_MODE_A);

		if (data < 0)
			return -EIO;
		ctrl->value = !!(data & MT9M111_RMB_MIRROR_COLS);
		break;
	case V4L2_CID_GAIN:
		data = mt9m111_get_global_gain(icd);
		if (data < 0)
			return data;
		ctrl->value = data;
		break;
	case V4L2_CID_EXPOSURE_AUTO:
		ctrl->value = mt9m111->autoexposure;
		break;
	}
	return 0;
}

static int mt9m111_set_control(struct soc_camera_device *icd,
			       struct v4l2_control *ctrl)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	const struct v4l2_queryctrl *qctrl;
	int ret;

	qctrl = soc_camera_find_qctrl(&mt9m111_ops, ctrl->id);

	if (!qctrl)
		return -EINVAL;

	switch (ctrl->id) {
	case V4L2_CID_VFLIP:
		mt9m111->vflip = ctrl->value;
		ret = mt9m111_set_flip(icd, ctrl->value,
					MT9M111_RMB_MIRROR_ROWS);
		break;
	case V4L2_CID_HFLIP:
		mt9m111->hflip = ctrl->value;
		ret = mt9m111_set_flip(icd, ctrl->value,
					MT9M111_RMB_MIRROR_COLS);
		break;
	case V4L2_CID_GAIN:
		ret = mt9m111_set_global_gain(icd, ctrl->value);
		break;
	case V4L2_CID_EXPOSURE_AUTO:
		ret =  mt9m111_set_autoexposure(icd, ctrl->value);
		break;
	default:
		ret = -EINVAL;
	}

	return ret;
}

static int mt9m111_restore_state(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);

	mt9m111_set_context(icd, mt9m111->context);
	mt9m111_set_pixfmt(icd, mt9m111->pixfmt);
	mt9m111_setup_rect(icd);
	mt9m111_set_flip(icd, mt9m111->hflip, MT9M111_RMB_MIRROR_COLS);
	mt9m111_set_flip(icd, mt9m111->vflip, MT9M111_RMB_MIRROR_ROWS);
	mt9m111_set_global_gain(icd, icd->gain);
	mt9m111_set_autoexposure(icd, mt9m111->autoexposure);
	return 0;
}

static int mt9m111_resume(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int ret = 0;

	if (mt9m111->powered) {
		ret = mt9m111_enable(icd);
		if (!ret)
			ret = mt9m111_reset(icd);
		if (!ret)
			ret = mt9m111_restore_state(icd);
	}
	return ret;
}

static int mt9m111_init(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	int ret;

	mt9m111->context = HIGHPOWER;
	ret = mt9m111_enable(icd);
	if (!ret)
		ret = mt9m111_reset(icd);
	if (!ret)
		ret = mt9m111_set_context(icd, mt9m111->context);
	if (!ret)
		ret = mt9m111_set_autoexposure(icd, mt9m111->autoexposure);
	if (ret)
		dev_err(&icd->dev, "mt9m111 init failed: %d\n", ret);
	return ret;
}

static int mt9m111_release(struct soc_camera_device *icd)
{
	int ret;

	ret = mt9m111_disable(icd);
	if (ret < 0)
		dev_err(&icd->dev, "mt9m111 release failed: %d\n", ret);

	return ret;
}

/*
 * 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 mt9m111_video_probe(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);
	s32 data;
	int ret;

	/*
	 * We must have a parent by now. And it cannot be a wrong one.
	 * So this entire test is completely redundant.
	 */
	if (!icd->dev.parent ||
	    to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
		return -ENODEV;

	ret = mt9m111_enable(icd);
	if (ret)
		goto ei2c;
	ret = mt9m111_reset(icd);
	if (ret)
		goto ei2c;

	data = reg_read(CHIP_VERSION);

	switch (data) {
	case 0x143a:
		mt9m111->model = V4L2_IDENT_MT9M111;
		icd->formats = mt9m111_colour_formats;
		icd->num_formats = ARRAY_SIZE(mt9m111_colour_formats);
		break;
	default:
		ret = -ENODEV;
		dev_err(&icd->dev,
			"No MT9M111 chip detected, register read %x\n", data);
		goto ei2c;
	}

	dev_info(&icd->dev, "Detected a MT9M111 chip ID 0x143a\n");

	ret = soc_camera_video_start(icd);
	if (ret)
		goto eisis;

	mt9m111->autoexposure = 1;

	mt9m111->swap_rgb_even_odd = 1;
	mt9m111->swap_rgb_red_blue = 1;

	return 0;
eisis:
ei2c:
	return ret;
}

static void mt9m111_video_remove(struct soc_camera_device *icd)
{
	struct mt9m111 *mt9m111 = container_of(icd, struct mt9m111, icd);

	dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9m111->client->addr,
		mt9m111->icd.dev.parent, mt9m111->icd.vdev);
	soc_camera_video_stop(&mt9m111->icd);
}

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
static int mt9m111_probe(struct i2c_client *client)
#else
static int mt9m111_probe(struct i2c_client *client,
			 const struct i2c_device_id *did)
#endif
{
	struct mt9m111 *mt9m111;
	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, "MT9M111 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;
	}

	mt9m111 = kzalloc(sizeof(struct mt9m111), GFP_KERNEL);
	if (!mt9m111)
		return -ENOMEM;

	mt9m111->client = client;
	i2c_set_clientdata(client, mt9m111);

	/* Second stage probe - when a capture adapter is there */
	icd 		= &mt9m111->icd;
	icd->ops	= &mt9m111_ops;
	icd->control	= &client->dev;
	icd->x_min	= MT9M111_MIN_DARK_COLS;
	icd->y_min	= MT9M111_MIN_DARK_ROWS;
	icd->x_current	= icd->x_min;
	icd->y_current	= icd->y_min;
	icd->width_min	= MT9M111_MIN_DARK_ROWS;
	icd->width_max	= MT9M111_MAX_WIDTH;
	icd->height_min	= MT9M111_MIN_DARK_COLS;
	icd->height_max	= MT9M111_MAX_HEIGHT;
	icd->y_skip_top	= 0;
	icd->iface	= icl->bus_id;

	ret = soc_camera_device_register(icd);
	if (ret)
		goto eisdr;
	return 0;

eisdr:
	kfree(mt9m111);
	return ret;
}

static int mt9m111_remove(struct i2c_client *client)
{
	struct mt9m111 *mt9m111 = i2c_get_clientdata(client);
	soc_camera_device_unregister(&mt9m111->icd);
	kfree(mt9m111);

	return 0;
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
static const struct i2c_device_id mt9m111_id[] = {
	{ "mt9m111", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, mt9m111_id);
#endif

static struct i2c_driver mt9m111_i2c_driver = {
	.driver = {
		.name = "mt9m111",
	},
	.probe		= mt9m111_probe,
	.remove		= mt9m111_remove,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
	.id_table	= mt9m111_id,
#endif
};

static int __init mt9m111_mod_init(void)
{
	return i2c_add_driver(&mt9m111_i2c_driver);
}

static void __exit mt9m111_mod_exit(void)
{
	i2c_del_driver(&mt9m111_i2c_driver);
}

module_init(mt9m111_mod_init);
module_exit(mt9m111_mod_exit);

MODULE_DESCRIPTION("Micron MT9M111 Camera driver");
MODULE_AUTHOR("Robert Jarzmik");
MODULE_LICENSE("GPL");