[deliverable/linux.git] / drivers / media / i2c / ak881x.c

/*
 * Driver for AK8813 / AK8814 TV-ecoders from Asahi Kasei Microsystems Co., Ltd. (AKM)
 *
 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/module.h>

#include <media/ak881x.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>

#define AK881X_INTERFACE_MODE	0
#define AK881X_VIDEO_PROCESS1	1
#define AK881X_VIDEO_PROCESS2	2
#define AK881X_VIDEO_PROCESS3	3
#define AK881X_DAC_MODE		5
#define AK881X_STATUS		0x24
#define AK881X_DEVICE_ID	0x25
#define AK881X_DEVICE_REVISION	0x26

struct ak881x {
	struct v4l2_subdev subdev;
	struct ak881x_pdata *pdata;
	unsigned int lines;
	int id;	/* DEVICE_ID code V4L2_IDENT_AK881X code from v4l2-chip-ident.h */
	char revision;	/* DEVICE_REVISION content */
};

static int reg_read(struct i2c_client *client, const u8 reg)
{
	return i2c_smbus_read_byte_data(client, reg);
}

static int reg_write(struct i2c_client *client, const u8 reg,
		     const u8 data)
{
	return i2c_smbus_write_byte_data(client, reg, data);
}

static int reg_set(struct i2c_client *client, const u8 reg,
		   const u8 data, u8 mask)
{
	int ret = reg_read(client, reg);
	if (ret < 0)
		return ret;
	return reg_write(client, reg, (ret & ~mask) | (data & mask));
}

static struct ak881x *to_ak881x(const struct i2c_client *client)
{
	return container_of(i2c_get_clientdata(client), struct ak881x, subdev);
}

static int ak881x_g_chip_ident(struct v4l2_subdev *sd,
			       struct v4l2_dbg_chip_ident *id)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ak881x *ak881x = to_ak881x(client);

	if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
		return -EINVAL;

	if (id->match.addr != client->addr)
		return -ENODEV;

	id->ident	= ak881x->id;
	id->revision	= ak881x->revision;

	return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ak881x_g_register(struct v4l2_subdev *sd,
			     struct v4l2_dbg_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26)
		return -EINVAL;

	if (reg->match.addr != client->addr)
		return -ENODEV;

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

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

	return 0;
}

static int ak881x_s_register(struct v4l2_subdev *sd,
			     const struct v4l2_dbg_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26)
		return -EINVAL;

	if (reg->match.addr != client->addr)
		return -ENODEV;

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

	return 0;
}
#endif

static int ak881x_try_g_mbus_fmt(struct v4l2_subdev *sd,
				 struct v4l2_mbus_framefmt *mf)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ak881x *ak881x = to_ak881x(client);

	v4l_bound_align_image(&mf->width, 0, 720, 2,
			      &mf->height, 0, ak881x->lines, 1, 0);
	mf->field	= V4L2_FIELD_INTERLACED;
	mf->code	= V4L2_MBUS_FMT_YUYV8_2X8;
	mf->colorspace	= V4L2_COLORSPACE_SMPTE170M;

	return 0;
}

static int ak881x_s_mbus_fmt(struct v4l2_subdev *sd,
			     struct v4l2_mbus_framefmt *mf)
{
	if (mf->field != V4L2_FIELD_INTERLACED ||
	    mf->code != V4L2_MBUS_FMT_YUYV8_2X8)
		return -EINVAL;

	return ak881x_try_g_mbus_fmt(sd, mf);
}

static int ak881x_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned int index,
				enum v4l2_mbus_pixelcode *code)
{
	if (index)
		return -EINVAL;

	*code = V4L2_MBUS_FMT_YUYV8_2X8;
	return 0;
}

static int ak881x_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ak881x *ak881x = to_ak881x(client);

	a->bounds.left			= 0;
	a->bounds.top			= 0;
	a->bounds.width			= 720;
	a->bounds.height		= ak881x->lines;
	a->defrect			= a->bounds;
	a->type				= V4L2_BUF_TYPE_VIDEO_OUTPUT;
	a->pixelaspect.numerator	= 1;
	a->pixelaspect.denominator	= 1;

	return 0;
}

static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ak881x *ak881x = to_ak881x(client);
	u8 vp1;

	if (std == V4L2_STD_NTSC_443) {
		vp1 = 3;
		ak881x->lines = 480;
	} else if (std == V4L2_STD_PAL_M) {
		vp1 = 5;
		ak881x->lines = 480;
	} else if (std == V4L2_STD_PAL_60) {
		vp1 = 7;
		ak881x->lines = 480;
	} else if (std && !(std & ~V4L2_STD_PAL)) {
		vp1 = 0xf;
		ak881x->lines = 576;
	} else if (std && !(std & ~V4L2_STD_NTSC)) {
		vp1 = 0;
		ak881x->lines = 480;
	} else {
		/* No SECAM or PAL_N/Nc supported */
		return -EINVAL;
	}

	reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf);

	return 0;
}

static int ak881x_s_stream(struct v4l2_subdev *sd, int enable)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct ak881x *ak881x = to_ak881x(client);

	if (enable) {
		u8 dac;
		/* For colour-bar testing set bit 6 of AK881X_VIDEO_PROCESS1 */
		/* Default: composite output */
		if (ak881x->pdata->flags & AK881X_COMPONENT)
			dac = 3;
		else
			dac = 4;
		/* Turn on the DAC(s) */
		reg_write(client, AK881X_DAC_MODE, dac);
		dev_dbg(&client->dev, "chip status 0x%x\n",
			reg_read(client, AK881X_STATUS));
	} else {
		/* ...and clear bit 6 of AK881X_VIDEO_PROCESS1 here */
		reg_write(client, AK881X_DAC_MODE, 0);
		dev_dbg(&client->dev, "chip status 0x%x\n",
			reg_read(client, AK881X_STATUS));
	}

	return 0;
}

static struct v4l2_subdev_core_ops ak881x_subdev_core_ops = {
	.g_chip_ident	= ak881x_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register	= ak881x_g_register,
	.s_register	= ak881x_s_register,
#endif
};

static struct v4l2_subdev_video_ops ak881x_subdev_video_ops = {
	.s_mbus_fmt	= ak881x_s_mbus_fmt,
	.g_mbus_fmt	= ak881x_try_g_mbus_fmt,
	.try_mbus_fmt	= ak881x_try_g_mbus_fmt,
	.cropcap	= ak881x_cropcap,
	.enum_mbus_fmt	= ak881x_enum_mbus_fmt,
	.s_std_output	= ak881x_s_std_output,
	.s_stream	= ak881x_s_stream,
};

static struct v4l2_subdev_ops ak881x_subdev_ops = {
	.core	= &ak881x_subdev_core_ops,
	.video	= &ak881x_subdev_video_ops,
};

static int ak881x_probe(struct i2c_client *client,
			const struct i2c_device_id *did)
{
	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
	struct ak881x *ak881x;
	u8 ifmode, data;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
		dev_warn(&adapter->dev,
			 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
		return -EIO;
	}

	ak881x = devm_kzalloc(&client->dev, sizeof(*ak881x), GFP_KERNEL);
	if (!ak881x)
		return -ENOMEM;

	v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops);

	data = reg_read(client, AK881X_DEVICE_ID);

	switch (data) {
	case 0x13:
		ak881x->id = V4L2_IDENT_AK8813;
		break;
	case 0x14:
		ak881x->id = V4L2_IDENT_AK8814;
		break;
	default:
		dev_err(&client->dev,
			"No ak881x chip detected, register read %x\n", data);
		return -ENODEV;
	}

	ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION);
	ak881x->pdata = client->dev.platform_data;

	if (ak881x->pdata) {
		if (ak881x->pdata->flags & AK881X_FIELD)
			ifmode = 4;
		else
			ifmode = 0;

		switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) {
		case AK881X_IF_MODE_BT656:
			ifmode |= 1;
			break;
		case AK881X_IF_MODE_MASTER:
			ifmode |= 2;
			break;
		case AK881X_IF_MODE_SLAVE:
		default:
			break;
		}

		dev_dbg(&client->dev, "IF mode %x\n", ifmode);

		/*
		 * "Line Blanking No." seems to be the same as the number of
		 * "black" lines on, e.g., SuperH VOU, whose default value of 20
		 * "incidentally" matches ak881x' default
		 */
		reg_write(client, AK881X_INTERFACE_MODE, ifmode | (20 << 3));
	}

	/* Hardware default: NTSC-M */
	ak881x->lines = 480;

	dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n",
		 data, ak881x->revision);

	return 0;
}

static int ak881x_remove(struct i2c_client *client)
{
	struct ak881x *ak881x = to_ak881x(client);

	v4l2_device_unregister_subdev(&ak881x->subdev);

	return 0;
}

static const struct i2c_device_id ak881x_id[] = {
	{ "ak8813", 0 },
	{ "ak8814", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ak881x_id);

static struct i2c_driver ak881x_i2c_driver = {
	.driver = {
		.name = "ak881x",
	},
	.probe		= ak881x_probe,
	.remove		= ak881x_remove,
	.id_table	= ak881x_id,
};

module_i2c_driver(ak881x_i2c_driver);

MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814");
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
aec11e5d GL	1	/*
	2	* Driver for AK8813 / AK8814 TV-ecoders from Asahi Kasei Microsystems Co., Ltd. (AKM)
	3	*
	4	* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/i2c.h>
	12	#include <linux/init.h>
	13	#include <linux/platform_device.h>
1db2c22b	14	#include <linux/slab.h>
aec11e5d	15	#include <linux/videodev2.h>
7a707b89	16	#include <linux/module.h>
aec11e5d GL	17
	18	#include <media/ak881x.h>
	19	#include <media/v4l2-chip-ident.h>
	20	#include <media/v4l2-common.h>
	21	#include <media/v4l2-device.h>
	22
	23	#define AK881X_INTERFACE_MODE 0
	24	#define AK881X_VIDEO_PROCESS1 1
	25	#define AK881X_VIDEO_PROCESS2 2
	26	#define AK881X_VIDEO_PROCESS3 3
	27	#define AK881X_DAC_MODE 5
	28	#define AK881X_STATUS 0x24
	29	#define AK881X_DEVICE_ID 0x25
	30	#define AK881X_DEVICE_REVISION 0x26
	31
	32	struct ak881x {
	33	struct v4l2_subdev subdev;
	34	struct ak881x_pdata *pdata;
	35	unsigned int lines;
	36	int id; /* DEVICE_ID code V4L2_IDENT_AK881X code from v4l2-chip-ident.h */
	37	char revision; /* DEVICE_REVISION content */
	38	};
	39
	40	static int reg_read(struct i2c_client *client, const u8 reg)
	41	{
	42	return i2c_smbus_read_byte_data(client, reg);
	43	}
	44
	45	static int reg_write(struct i2c_client *client, const u8 reg,
	46	const u8 data)
	47	{
	48	return i2c_smbus_write_byte_data(client, reg, data);
	49	}
	50
	51	static int reg_set(struct i2c_client *client, const u8 reg,
	52	const u8 data, u8 mask)
	53	{
	54	int ret = reg_read(client, reg);
	55	if (ret < 0)
	56	return ret;
	57	return reg_write(client, reg, (ret & ~mask) \| (data & mask));
	58	}
	59
	60	static struct ak881x to_ak881x(const struct i2c_client client)
	61	{
	62	return container_of(i2c_get_clientdata(client), struct ak881x, subdev);
	63	}
	64
	65	static int ak881x_g_chip_ident(struct v4l2_subdev *sd,
	66	struct v4l2_dbg_chip_ident *id)
	67	{
	68	struct i2c_client *client = v4l2_get_subdevdata(sd);
	69	struct ak881x *ak881x = to_ak881x(client);
	70
	71	if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
	72	return -EINVAL;
	73
	74	if (id->match.addr != client->addr)
	75	return -ENODEV;
	76
	77	id->ident = ak881x->id;
	78	id->revision = ak881x->revision;
	79
	80	return 0;
81	}
82
83	#ifdef CONFIG_VIDEO_ADV_DEBUG
84	static int ak881x_g_register(struct v4l2_subdev *sd,
85	struct v4l2_dbg_register *reg)
86	{
87	struct i2c_client *client = v4l2_get_subdevdata(sd);
88
89	if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR \|\| reg->reg > 0x26)
90	return -EINVAL;
91
92	if (reg->match.addr != client->addr)
93	return -ENODEV;
94
95	reg->val = reg_read(client, reg->reg);
96
97	if (reg->val > 0xffff)
98	return -EIO;
99
100	return 0;
101	}
102
103	static int ak881x_s_register(struct v4l2_subdev *sd,
977ba3b1	104	const struct v4l2_dbg_register *reg)
aec11e5d GL	105	{
	106	struct i2c_client *client = v4l2_get_subdevdata(sd);
	107
	108	if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR \|\| reg->reg > 0x26)
	109	return -EINVAL;
	110
	111	if (reg->match.addr != client->addr)
	112	return -ENODEV;
	113
	114	if (reg_write(client, reg->reg, reg->val) < 0)
	115	return -EIO;
	116
	117	return 0;
	118	}
	119	#endif
	120
	121	static int ak881x_try_g_mbus_fmt(struct v4l2_subdev *sd,
	122	struct v4l2_mbus_framefmt *mf)
	123	{
	124	struct i2c_client *client = v4l2_get_subdevdata(sd);
	125	struct ak881x *ak881x = to_ak881x(client);
	126
	127	v4l_bound_align_image(&mf->width, 0, 720, 2,
	128	&mf->height, 0, ak881x->lines, 1, 0);
	129	mf->field = V4L2_FIELD_INTERLACED;
ace6e979	130	mf->code = V4L2_MBUS_FMT_YUYV8_2X8;
aec11e5d GL	131	mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
	132
	133	return 0;
	134	}
	135
	136	static int ak881x_s_mbus_fmt(struct v4l2_subdev *sd,
	137	struct v4l2_mbus_framefmt *mf)
	138	{
	139	if (mf->field != V4L2_FIELD_INTERLACED \|\|
ace6e979	140	mf->code != V4L2_MBUS_FMT_YUYV8_2X8)
aec11e5d GL	141	return -EINVAL;
	142
	143	return ak881x_try_g_mbus_fmt(sd, mf);
	144	}
	145
3805f201	146	static int ak881x_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned int index,
aec11e5d GL	147	enum v4l2_mbus_pixelcode *code)
	148	{
	149	if (index)
	150	return -EINVAL;
	151
ace6e979	152	*code = V4L2_MBUS_FMT_YUYV8_2X8;
aec11e5d GL	153	return 0;
	154	}
	155
	156	static int ak881x_cropcap(struct v4l2_subdev sd, struct v4l2_cropcap a)
	157	{
	158	struct i2c_client *client = v4l2_get_subdevdata(sd);
	159	struct ak881x *ak881x = to_ak881x(client);
	160
	161	a->bounds.left = 0;
	162	a->bounds.top = 0;
	163	a->bounds.width = 720;
	164	a->bounds.height = ak881x->lines;
	165	a->defrect = a->bounds;
	166	a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
	167	a->pixelaspect.numerator = 1;
	168	a->pixelaspect.denominator = 1;
	169
	170	return 0;
	171	}
	172
	173	static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
	174	{
	175	struct i2c_client *client = v4l2_get_subdevdata(sd);
	176	struct ak881x *ak881x = to_ak881x(client);
	177	u8 vp1;
	178
	179	if (std == V4L2_STD_NTSC_443) {
	180	vp1 = 3;
	181	ak881x->lines = 480;
	182	} else if (std == V4L2_STD_PAL_M) {
	183	vp1 = 5;
	184	ak881x->lines = 480;
	185	} else if (std == V4L2_STD_PAL_60) {
	186	vp1 = 7;
	187	ak881x->lines = 480;
	188	} else if (std && !(std & ~V4L2_STD_PAL)) {
	189	vp1 = 0xf;
	190	ak881x->lines = 576;
	191	} else if (std && !(std & ~V4L2_STD_NTSC)) {
	192	vp1 = 0;
	193	ak881x->lines = 480;
	194	} else {
	195	/* No SECAM or PAL_N/Nc supported */
	196	return -EINVAL;
	197	}
	198
	199	reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf);
	200
	201	return 0;
	202	}
	203
	204	static int ak881x_s_stream(struct v4l2_subdev *sd, int enable)
	205	{
	206	struct i2c_client *client = v4l2_get_subdevdata(sd);
	207	struct ak881x *ak881x = to_ak881x(client);
	208
	209	if (enable) {
	210	u8 dac;
	211	/* For colour-bar testing set bit 6 of AK881X_VIDEO_PROCESS1 */
	212	/* Default: composite output */
	213	if (ak881x->pdata->flags & AK881X_COMPONENT)
	214	dac = 3;
	215	else
	216	dac = 4;
217	/* Turn on the DAC(s) */
218	reg_write(client, AK881X_DAC_MODE, dac);
219	dev_dbg(&client->dev, "chip status 0x%x\n",
220	reg_read(client, AK881X_STATUS));
221	} else {
222	/* ...and clear bit 6 of AK881X_VIDEO_PROCESS1 here */
223	reg_write(client, AK881X_DAC_MODE, 0);
224	dev_dbg(&client->dev, "chip status 0x%x\n",
225	reg_read(client, AK881X_STATUS));
226	}
227
228	return 0;
229	}
230
231	static struct v4l2_subdev_core_ops ak881x_subdev_core_ops = {
232	.g_chip_ident = ak881x_g_chip_ident,
233	#ifdef CONFIG_VIDEO_ADV_DEBUG
234	.g_register = ak881x_g_register,
235	.s_register = ak881x_s_register,
236	#endif
237	};
238
239	static struct v4l2_subdev_video_ops ak881x_subdev_video_ops = {
240	.s_mbus_fmt = ak881x_s_mbus_fmt,
241	.g_mbus_fmt = ak881x_try_g_mbus_fmt,
242	.try_mbus_fmt = ak881x_try_g_mbus_fmt,
243	.cropcap = ak881x_cropcap,
244	.enum_mbus_fmt = ak881x_enum_mbus_fmt,
245	.s_std_output = ak881x_s_std_output,
246	.s_stream = ak881x_s_stream,
247	};
248
249	static struct v4l2_subdev_ops ak881x_subdev_ops = {
250	.core = &ak881x_subdev_core_ops,
251	.video = &ak881x_subdev_video_ops,
252	};
253
254	static int ak881x_probe(struct i2c_client *client,
255	const struct i2c_device_id *did)
256	{
257	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
258	struct ak881x *ak881x;
259	u8 ifmode, data;
260
261	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
262	dev_warn(&adapter->dev,
263	"I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
264	return -EIO;
265	}
266
c02b211d	267	ak881x = devm_kzalloc(&client->dev, sizeof(*ak881x), GFP_KERNEL);
aec11e5d GL	268	if (!ak881x)
	269	return -ENOMEM;
	270
	271	v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops);
	272
	273	data = reg_read(client, AK881X_DEVICE_ID);
	274
	275	switch (data) {
	276	case 0x13:
	277	ak881x->id = V4L2_IDENT_AK8813;
	278	break;
	279	case 0x14:
	280	ak881x->id = V4L2_IDENT_AK8814;
	281	break;
	282	default:
	283	dev_err(&client->dev,
	284	"No ak881x chip detected, register read %x\n", data);
aec11e5d GL	285	return -ENODEV;
	286	}
	287
	288	ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION);
	289	ak881x->pdata = client->dev.platform_data;
	290
	291	if (ak881x->pdata) {
	292	if (ak881x->pdata->flags & AK881X_FIELD)
	293	ifmode = 4;
	294	else
	295	ifmode = 0;
	296
	297	switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) {
	298	case AK881X_IF_MODE_BT656:
	299	ifmode \|= 1;
	300	break;
	301	case AK881X_IF_MODE_MASTER:
	302	ifmode \|= 2;
	303	break;
	304	case AK881X_IF_MODE_SLAVE:
	305	default:
	306	break;
	307	}
	308
	309	dev_dbg(&client->dev, "IF mode %x\n", ifmode);
	310
	311	/*
	312	* "Line Blanking No." seems to be the same as the number of
	313	* "black" lines on, e.g., SuperH VOU, whose default value of 20
	314	* "incidentally" matches ak881x' default
	315	*/
	316	reg_write(client, AK881X_INTERFACE_MODE, ifmode \| (20 << 3));
	317	}
	318
	319	/* Hardware default: NTSC-M */
	320	ak881x->lines = 480;
	321
	322	dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n",
	323	data, ak881x->revision);
	324
	325	return 0;
	326	}
	327
	328	static int ak881x_remove(struct i2c_client *client)
	329	{
	330	struct ak881x *ak881x = to_ak881x(client);
	331
	332	v4l2_device_unregister_subdev(&ak881x->subdev);
aec11e5d GL	333
	334	return 0;
	335	}
	336
	337	static const struct i2c_device_id ak881x_id[] = {
	338	{ "ak8813", 0 },
	339	{ "ak8814", 0 },
	340	{ }
	341	};
	342	MODULE_DEVICE_TABLE(i2c, ak881x_id);
	343
	344	static struct i2c_driver ak881x_i2c_driver = {
	345	.driver = {
	346	.name = "ak881x",
	347	},
	348	.probe = ak881x_probe,
	349	.remove = ak881x_remove,
	350	.id_table = ak881x_id,
	351	};
	352
c6e8d86f	353	module_i2c_driver(ak881x_i2c_driver);
aec11e5d GL	354
	355	MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814");
	356	MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
	357	MODULE_LICENSE("GPL v2");