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Commit aec11e5d authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Mauro Carvalho Chehab
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V4L/DVB: V4L: v4l2-subdev driver for AK8813 and AK8814 TV-encoders from AKM 



AK8814 only differs from AK8813 by included Macrovision Copy Protection
function. This patch adds a driver for AK8813 and AK8814 I2C PAL/NTSC TV
encoders.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent a81fb9b2

drivers/media/video/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -480,6 +480,12 @@ config VIDEO_ADV7343 
	  To compile this driver as a module, choose M here: the

	  module will be called adv7343.



config VIDEO_AK881X

	tristate "AK8813/AK8814 video encoders"

	depends on I2C

	help

	  Video output driver for AKM AK8813 and AK8814 TV encoders



comment "Video improvement chips"



config VIDEO_UPD64031A

drivers/media/video/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -151,6 +151,8 @@ obj-$(CONFIG_VIDEO_CX18) += cx18/ 
obj-$(CONFIG_VIDEO_VIVI) += vivi.o

obj-$(CONFIG_VIDEO_CX23885) += cx23885/



obj-$(CONFIG_VIDEO_AK881X)		+= ak881x.o



obj-$(CONFIG_VIDEO_OMAP2)		+= omap2cam.o

obj-$(CONFIG_SOC_CAMERA)		+= soc_camera.o soc_mediabus.o

obj-$(CONFIG_SOC_CAMERA_PLATFORM)	+= soc_camera_platform.o

drivers/media/video/ak881x.c

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+368 −0
Original line number Diff line number Diff line 
/*

 * 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/videodev2.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,

			     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_LE;

	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_LE)

		return -EINVAL;



	return ak881x_try_g_mbus_fmt(sd, mf);

}



static int ak881x_enum_mbus_fmt(struct v4l2_subdev *sd, int index,

				enum v4l2_mbus_pixelcode *code)

{

	if (index)

		return -EINVAL;



	*code = V4L2_MBUS_FMT_YUYV8_2X8_LE;

	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 = kzalloc(sizeof(struct 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);

		kfree(ak881x);

		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);

	kfree(ak881x);



	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,

};



static int __init ak881x_module_init(void)

{

	return i2c_add_driver(&ak881x_i2c_driver);

}



static void __exit ak881x_module_exit(void)

{

	i2c_del_driver(&ak881x_i2c_driver);

}



module_init(ak881x_module_init);

module_exit(ak881x_module_exit);



MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814");

MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");

MODULE_LICENSE("GPL v2");

include/media/ak881x.h

0 → 100644
+25 −0
Original line number Diff line number Diff line 
/*

 * Header 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.

 */



#ifndef AK881X_H

#define AK881X_H



#define AK881X_IF_MODE_MASK	(3 << 0)

#define AK881X_IF_MODE_BT656	(0 << 0)

#define AK881X_IF_MODE_MASTER	(1 << 0)

#define AK881X_IF_MODE_SLAVE	(2 << 0)

#define AK881X_FIELD		(1 << 2)

#define AK881X_COMPONENT	(1 << 3)



struct ak881x_pdata {

	unsigned long flags;

};



#endif

include/media/v4l2-chip-ident.h

+4 −0
Original line number Diff line number Diff line
@@ -178,6 +178,10 @@ enum { 
	/* module cafe_ccic, just ident 8801 */

	V4L2_IDENT_CAFE = 8801,



	/* AKM AK8813/AK8814 */

	V4L2_IDENT_AK8813 = 8813,

	V4L2_IDENT_AK8814 = 8814,



	/* module cx23885 and cx25840 */

	V4L2_IDENT_CX23885    = 8850,

	V4L2_IDENT_CX23885_AV = 8851, /* Integrated A/V decoder */