[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / bt856.c

/*
 * bt856 - BT856A Digital Video Encoder (Rockwell Part)
 *
 * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
 *
 * Modifications for LML33/DC10plus unified driver
 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
 *
 * This code was modify/ported from the saa7111 driver written
 * by Dave Perks.
 *
 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
 *   - moved over to linux>=2.4.x i2c protocol (9/9/2002)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/ioctl.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-i2c-drv.h>

MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
MODULE_AUTHOR("Mike Bernson & Dave Perks");
MODULE_LICENSE("GPL");

static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");


/* ----------------------------------------------------------------------- */

#define BT856_REG_OFFSET	0xDA
#define BT856_NR_REG		6

struct bt856 {
	struct v4l2_subdev sd;
	unsigned char reg[BT856_NR_REG];

	v4l2_std_id norm;
};

static inline struct bt856 *to_bt856(struct v4l2_subdev *sd)
{
	return container_of(sd, struct bt856, sd);
}

/* ----------------------------------------------------------------------- */

static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value)
{
	struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);

	encoder->reg[reg - BT856_REG_OFFSET] = value;
	return i2c_smbus_write_byte_data(client, reg, value);
}

static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value)
{
	return bt856_write(encoder, reg,
		(encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) |
				(value ? (1 << bit) : 0));
}

static void bt856_dump(struct bt856 *encoder)
{
	int i;

	v4l2_info(&encoder->sd, "register dump:\n");
	for (i = 0; i < BT856_NR_REG; i += 2)
		printk(KERN_CONT " %02x", encoder->reg[i]);
	printk(KERN_CONT "\n");
}

/* ----------------------------------------------------------------------- */

static int bt856_init(struct v4l2_subdev *sd, u32 arg)
{
	struct bt856 *encoder = to_bt856(sd);

	/* This is just for testing!!! */
	v4l2_dbg(1, debug, sd, "init\n");
	bt856_write(encoder, 0xdc, 0x18);
	bt856_write(encoder, 0xda, 0);
	bt856_write(encoder, 0xde, 0);

	bt856_setbit(encoder, 0xdc, 3, 1);
	/*bt856_setbit(encoder, 0xdc, 6, 0);*/
	bt856_setbit(encoder, 0xdc, 4, 1);

	if (encoder->norm & V4L2_STD_NTSC)
		bt856_setbit(encoder, 0xdc, 2, 0);
	else
		bt856_setbit(encoder, 0xdc, 2, 1);

	bt856_setbit(encoder, 0xdc, 1, 1);
	bt856_setbit(encoder, 0xde, 4, 0);
	bt856_setbit(encoder, 0xde, 3, 1);
	if (debug != 0)
		bt856_dump(encoder);
	return 0;
}

static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
{
	struct bt856 *encoder = to_bt856(sd);

	v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);

	if (std & V4L2_STD_NTSC) {
		bt856_setbit(encoder, 0xdc, 2, 0);
	} else if (std & V4L2_STD_PAL) {
		bt856_setbit(encoder, 0xdc, 2, 1);
		bt856_setbit(encoder, 0xda, 0, 0);
		/*bt856_setbit(encoder, 0xda, 0, 1);*/
	} else {
		return -EINVAL;
	}
	encoder->norm = std;
	if (debug != 0)
		bt856_dump(encoder);
	return 0;
}

static int bt856_s_routing(struct v4l2_subdev *sd,
			   u32 input, u32 output, u32 config)
{
	struct bt856 *encoder = to_bt856(sd);

	v4l2_dbg(1, debug, sd, "set input %d\n", input);

	/* We only have video bus.
	 * input= 0: input is from bt819
	 * input= 1: input is from ZR36060 */
	switch (input) {
	case 0:
		bt856_setbit(encoder, 0xde, 4, 0);
		bt856_setbit(encoder, 0xde, 3, 1);
		bt856_setbit(encoder, 0xdc, 3, 1);
		bt856_setbit(encoder, 0xdc, 6, 0);
		break;
	case 1:
		bt856_setbit(encoder, 0xde, 4, 0);
		bt856_setbit(encoder, 0xde, 3, 1);
		bt856_setbit(encoder, 0xdc, 3, 1);
		bt856_setbit(encoder, 0xdc, 6, 1);
		break;
	case 2:	/* Color bar */
		bt856_setbit(encoder, 0xdc, 3, 0);
		bt856_setbit(encoder, 0xde, 4, 1);
		break;
	default:
		return -EINVAL;
	}

	if (debug != 0)
		bt856_dump(encoder);
	return 0;
}

static int bt856_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT856, 0);
}

/* ----------------------------------------------------------------------- */

static const struct v4l2_subdev_core_ops bt856_core_ops = {
	.g_chip_ident = bt856_g_chip_ident,
	.init = bt856_init,
};

static const struct v4l2_subdev_video_ops bt856_video_ops = {
	.s_std_output = bt856_s_std_output,
	.s_routing = bt856_s_routing,
};

static const struct v4l2_subdev_ops bt856_ops = {
	.core = &bt856_core_ops,
	.video = &bt856_video_ops,
};

/* ----------------------------------------------------------------------- */

static int bt856_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct bt856 *encoder;
	struct v4l2_subdev *sd;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -ENODEV;

	v4l_info(client, "chip found @ 0x%x (%s)\n",
			client->addr << 1, client->adapter->name);

	encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
	if (encoder == NULL)
		return -ENOMEM;
	sd = &encoder->sd;
	v4l2_i2c_subdev_init(sd, client, &bt856_ops);
	encoder->norm = V4L2_STD_NTSC;

	bt856_write(encoder, 0xdc, 0x18);
	bt856_write(encoder, 0xda, 0);
	bt856_write(encoder, 0xde, 0);

	bt856_setbit(encoder, 0xdc, 3, 1);
	/*bt856_setbit(encoder, 0xdc, 6, 0);*/
	bt856_setbit(encoder, 0xdc, 4, 1);

	if (encoder->norm & V4L2_STD_NTSC)
		bt856_setbit(encoder, 0xdc, 2, 0);
	else
		bt856_setbit(encoder, 0xdc, 2, 1);

	bt856_setbit(encoder, 0xdc, 1, 1);
	bt856_setbit(encoder, 0xde, 4, 0);
	bt856_setbit(encoder, 0xde, 3, 1);

	if (debug != 0)
		bt856_dump(encoder);
	return 0;
}

static int bt856_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	v4l2_device_unregister_subdev(sd);
	kfree(to_bt856(sd));
	return 0;
}

static const struct i2c_device_id bt856_id[] = {
	{ "bt856", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, bt856_id);

static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "bt856",
	.probe = bt856_probe,
	.remove = bt856_remove,
	.id_table = bt856_id,
};
Commit	Line	Data
d56410e0	1	/*
1da177e4 LT	2	* bt856 - BT856A Digital Video Encoder (Rockwell Part)
	3	*
	4	* Copyright (C) 1999 Mike Bernson <mike@mlb.org>
	5	* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
	6	*
	7	* Modifications for LML33/DC10plus unified driver
	8	* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
	9	*
	10	* This code was modify/ported from the saa7111 driver written
	11	* by Dave Perks.
	12	*
	13	* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
	14	* - moved over to linux>=2.4.x i2c protocol (9/9/2002)
	15	*
	16	* This program is free software; you can redistribute it and/or modify
	17	* it under the terms of the GNU General Public License as published by
	18	* the Free Software Foundation; either version 2 of the License, or
	19	* (at your option) any later version.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, write to the Free Software
	28	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	29	*/
	30
	31	#include <linux/module.h>
18f3fa1e	32	#include <linux/types.h>
a8c26dfe	33	#include <linux/ioctl.h>
18f3fa1e	34	#include <asm/uaccess.h>
a8c26dfe HV	35	#include <linux/i2c.h>
a8c26dfe HV	36	#include <linux/i2c-id.h>
a91f56e7 HV	37	#include <linux/videodev2.h>
	38	#include <media/v4l2-device.h>
	39	#include <media/v4l2-chip-ident.h>
2d26698e	40	#include <media/v4l2-i2c-drv.h>
1da177e4 LT	41
	42	MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
	43	MODULE_AUTHOR("Mike Bernson & Dave Perks");
	44	MODULE_LICENSE("GPL");
	45
ff699e6b	46	static int debug;
1da177e4 LT	47	module_param(debug, int, 0);
	48	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	49
a91f56e7	50
1da177e4 LT	51	/* ----------------------------------------------------------------------- */
1da177e4 LT	52
187565c4 HV	53	#define BT856_REG_OFFSET 0xDA
187565c4 HV	54	#define BT856_NR_REG 6
1da177e4 LT	55
1da177e4 LT	56	struct bt856 {
a91f56e7	57	struct v4l2_subdev sd;
f49a5eae	58	unsigned char reg[BT856_NR_REG];
1da177e4	59
107063c6	60	v4l2_std_id norm;
1da177e4 LT	61	};
1da177e4 LT	62
a91f56e7 HV	63	static inline struct bt856 to_bt856(struct v4l2_subdev sd)
	64	{
	65	return container_of(sd, struct bt856, sd);
	66	}
	67
1da177e4 LT	68	/* ----------------------------------------------------------------------- */
1da177e4 LT	69
a91f56e7	70	static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value)
1da177e4	71	{
a91f56e7	72	struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
1da177e4	73
187565c4	74	encoder->reg[reg - BT856_REG_OFFSET] = value;
1da177e4 LT	75	return i2c_smbus_write_byte_data(client, reg, value);
	76	}
	77
a91f56e7	78	static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value)
1da177e4	79	{
a91f56e7	80	return bt856_write(encoder, reg,
a8c26dfe HV	81	(encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) \|
a8c26dfe HV	82	(value ? (1 << bit) : 0));
1da177e4 LT	83	}
1da177e4 LT	84
a91f56e7	85	static void bt856_dump(struct bt856 *encoder)
1da177e4 LT	86	{
1da177e4 LT	87	int i;
1da177e4	88
a91f56e7	89	v4l2_info(&encoder->sd, "register dump:\n");
f49a5eae	90	for (i = 0; i < BT856_NR_REG; i += 2)
a8c26dfe HV	91	printk(KERN_CONT " %02x", encoder->reg[i]);
a8c26dfe HV	92	printk(KERN_CONT "\n");
1da177e4 LT	93	}
	94
	95	/* ----------------------------------------------------------------------- */
	96
a91f56e7	97	static int bt856_init(struct v4l2_subdev *sd, u32 arg)
1da177e4	98	{
a91f56e7	99	struct bt856 *encoder = to_bt856(sd);
1da177e4	100
a91f56e7 HV	101	/* This is just for testing!!! */
	102	v4l2_dbg(1, debug, sd, "init\n");
	103	bt856_write(encoder, 0xdc, 0x18);
	104	bt856_write(encoder, 0xda, 0);
	105	bt856_write(encoder, 0xde, 0);
1da177e4	106
a91f56e7 HV	107	bt856_setbit(encoder, 0xdc, 3, 1);
	108	/bt856_setbit(encoder, 0xdc, 6, 0);/
	109	bt856_setbit(encoder, 0xdc, 4, 1);
	110
	111	if (encoder->norm & V4L2_STD_NTSC)
	112	bt856_setbit(encoder, 0xdc, 2, 0);
	113	else
	114	bt856_setbit(encoder, 0xdc, 2, 1);
	115
	116	bt856_setbit(encoder, 0xdc, 1, 1);
	117	bt856_setbit(encoder, 0xde, 4, 0);
	118	bt856_setbit(encoder, 0xde, 3, 1);
	119	if (debug != 0)
	120	bt856_dump(encoder);
	121	return 0;
	122	}
	123
	124	static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
	125	{
	126	struct bt856 *encoder = to_bt856(sd);
	127
cc5cef8e	128	v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
a91f56e7 HV	129
	130	if (std & V4L2_STD_NTSC) {
	131	bt856_setbit(encoder, 0xdc, 2, 0);
	132	} else if (std & V4L2_STD_PAL) {
	133	bt856_setbit(encoder, 0xdc, 2, 1);
	134	bt856_setbit(encoder, 0xda, 0, 0);
	135	/bt856_setbit(encoder, 0xda, 0, 1);/
	136	} else {
	137	return -EINVAL;
a8c26dfe	138	}
a91f56e7 HV	139	encoder->norm = std;
	140	if (debug != 0)
	141	bt856_dump(encoder);
	142	return 0;
	143	}
1da177e4	144
5325b427 HV	145	static int bt856_s_routing(struct v4l2_subdev *sd,
5325b427 HV	146	u32 input, u32 output, u32 config)
a91f56e7 HV	147	{
	148	struct bt856 *encoder = to_bt856(sd);
	149
5325b427	150	v4l2_dbg(1, debug, sd, "set input %d\n", input);
a91f56e7 HV	151
a91f56e7 HV	152	/* We only have video bus.
5325b427 HV	153	* input= 0: input is from bt819
	154	* input= 1: input is from ZR36060 */
	155	switch (input) {
a91f56e7 HV	156	case 0:
	157	bt856_setbit(encoder, 0xde, 4, 0);
	158	bt856_setbit(encoder, 0xde, 3, 1);
	159	bt856_setbit(encoder, 0xdc, 3, 1);
	160	bt856_setbit(encoder, 0xdc, 6, 0);
	161	break;
	162	case 1:
	163	bt856_setbit(encoder, 0xde, 4, 0);
	164	bt856_setbit(encoder, 0xde, 3, 1);
	165	bt856_setbit(encoder, 0xdc, 3, 1);
	166	bt856_setbit(encoder, 0xdc, 6, 1);
	167	break;
	168	case 2: /* Color bar */
	169	bt856_setbit(encoder, 0xdc, 3, 0);
	170	bt856_setbit(encoder, 0xde, 4, 1);
	171	break;
1da177e4 LT	172	default:
	173	return -EINVAL;
	174	}
	175
a91f56e7 HV	176	if (debug != 0)
a91f56e7 HV	177	bt856_dump(encoder);
1da177e4 LT	178	return 0;
	179	}
	180
a91f56e7 HV	181	static int bt856_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
	182	{
	183	struct i2c_client *client = v4l2_get_subdevdata(sd);
	184
	185	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT856, 0);
	186	}
	187
1da177e4 LT	188	/* ----------------------------------------------------------------------- */
1da177e4 LT	189
a91f56e7 HV	190	static const struct v4l2_subdev_core_ops bt856_core_ops = {
	191	.g_chip_ident = bt856_g_chip_ident,
	192	.init = bt856_init,
	193	};
1da177e4	194
a91f56e7 HV	195	static const struct v4l2_subdev_video_ops bt856_video_ops = {
	196	.s_std_output = bt856_s_std_output,
	197	.s_routing = bt856_s_routing,
	198	};
	199
	200	static const struct v4l2_subdev_ops bt856_ops = {
	201	.core = &bt856_core_ops,
	202	.video = &bt856_video_ops,
	203	};
	204
	205	/* ----------------------------------------------------------------------- */
1da177e4	206
a8c26dfe HV	207	static int bt856_probe(struct i2c_client *client,
a8c26dfe HV	208	const struct i2c_device_id *id)
1da177e4	209	{
1da177e4	210	struct bt856 *encoder;
a91f56e7	211	struct v4l2_subdev *sd;
1da177e4	212
1da177e4	213	/* Check if the adapter supports the needed features */
a8c26dfe HV	214	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
a8c26dfe HV	215	return -ENODEV;
1da177e4	216
a8c26dfe HV	217	v4l_info(client, "chip found @ 0x%x (%s)\n",
a8c26dfe HV	218	client->addr << 1, client->adapter->name);
1da177e4	219
7408187d	220	encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
a8c26dfe	221	if (encoder == NULL)
1da177e4	222	return -ENOMEM;
a91f56e7 HV	223	sd = &encoder->sd;
a91f56e7 HV	224	v4l2_i2c_subdev_init(sd, client, &bt856_ops);
107063c6	225	encoder->norm = V4L2_STD_NTSC;
1da177e4	226
a91f56e7 HV	227	bt856_write(encoder, 0xdc, 0x18);
	228	bt856_write(encoder, 0xda, 0);
	229	bt856_write(encoder, 0xde, 0);
1da177e4	230
a91f56e7 HV	231	bt856_setbit(encoder, 0xdc, 3, 1);
	232	/bt856_setbit(encoder, 0xdc, 6, 0);/
	233	bt856_setbit(encoder, 0xdc, 4, 1);
1da177e4	234
107063c6	235	if (encoder->norm & V4L2_STD_NTSC)
a91f56e7	236	bt856_setbit(encoder, 0xdc, 2, 0);
107063c6	237	else
a91f56e7	238	bt856_setbit(encoder, 0xdc, 2, 1);
1da177e4	239
a91f56e7 HV	240	bt856_setbit(encoder, 0xdc, 1, 1);
	241	bt856_setbit(encoder, 0xde, 4, 0);
	242	bt856_setbit(encoder, 0xde, 3, 1);
1da177e4 LT	243
1da177e4 LT	244	if (debug != 0)
a91f56e7	245	bt856_dump(encoder);
1da177e4 LT	246	return 0;
	247	}
	248
a8c26dfe	249	static int bt856_remove(struct i2c_client *client)
1da177e4	250	{
a91f56e7 HV	251	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	252
	253	v4l2_device_unregister_subdev(sd);
	254	kfree(to_bt856(sd));
1da177e4 LT	255	return 0;
	256	}
	257
a8c26dfe HV	258	static const struct i2c_device_id bt856_id[] = {
	259	{ "bt856", 0 },
	260	{ }
	261	};
	262	MODULE_DEVICE_TABLE(i2c, bt856_id);
1da177e4	263
a8c26dfe HV	264	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
a8c26dfe HV	265	.name = "bt856",
a8c26dfe HV	266	.probe = bt856_probe,
	267	.remove = bt856_remove,
	268	.id_table = bt856_id,
1da177e4	269	};