[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/slab.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>
5a0e3ad6	33	#include <linux/slab.h>
a8c26dfe	34	#include <linux/ioctl.h>
18f3fa1e	35	#include <asm/uaccess.h>
a8c26dfe HV	36	#include <linux/i2c.h>
a8c26dfe HV	37	#include <linux/i2c-id.h>
a91f56e7 HV	38	#include <linux/videodev2.h>
	39	#include <media/v4l2-device.h>
	40	#include <media/v4l2-chip-ident.h>
2d26698e	41	#include <media/v4l2-i2c-drv.h>
1da177e4 LT	42
	43	MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
	44	MODULE_AUTHOR("Mike Bernson & Dave Perks");
	45	MODULE_LICENSE("GPL");
	46
ff699e6b	47	static int debug;
1da177e4 LT	48	module_param(debug, int, 0);
	49	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	50
a91f56e7	51
1da177e4 LT	52	/* ----------------------------------------------------------------------- */
1da177e4 LT	53
187565c4 HV	54	#define BT856_REG_OFFSET 0xDA
187565c4 HV	55	#define BT856_NR_REG 6
1da177e4 LT	56
1da177e4 LT	57	struct bt856 {
a91f56e7	58	struct v4l2_subdev sd;
f49a5eae	59	unsigned char reg[BT856_NR_REG];
1da177e4	60
107063c6	61	v4l2_std_id norm;
1da177e4 LT	62	};
1da177e4 LT	63
a91f56e7 HV	64	static inline struct bt856 to_bt856(struct v4l2_subdev sd)
	65	{
	66	return container_of(sd, struct bt856, sd);
	67	}
	68
1da177e4 LT	69	/* ----------------------------------------------------------------------- */
1da177e4 LT	70
a91f56e7	71	static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value)
1da177e4	72	{
a91f56e7	73	struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
1da177e4	74
187565c4	75	encoder->reg[reg - BT856_REG_OFFSET] = value;
1da177e4 LT	76	return i2c_smbus_write_byte_data(client, reg, value);
	77	}
	78
a91f56e7	79	static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value)
1da177e4	80	{
a91f56e7	81	return bt856_write(encoder, reg,
a8c26dfe HV	82	(encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) \|
a8c26dfe HV	83	(value ? (1 << bit) : 0));
1da177e4 LT	84	}
1da177e4 LT	85
a91f56e7	86	static void bt856_dump(struct bt856 *encoder)
1da177e4 LT	87	{
1da177e4 LT	88	int i;
1da177e4	89
a91f56e7	90	v4l2_info(&encoder->sd, "register dump:\n");
f49a5eae	91	for (i = 0; i < BT856_NR_REG; i += 2)
a8c26dfe HV	92	printk(KERN_CONT " %02x", encoder->reg[i]);
a8c26dfe HV	93	printk(KERN_CONT "\n");
1da177e4 LT	94	}
	95
	96	/* ----------------------------------------------------------------------- */
	97
a91f56e7	98	static int bt856_init(struct v4l2_subdev *sd, u32 arg)
1da177e4	99	{
a91f56e7	100	struct bt856 *encoder = to_bt856(sd);
1da177e4	101
a91f56e7 HV	102	/* This is just for testing!!! */
	103	v4l2_dbg(1, debug, sd, "init\n");
	104	bt856_write(encoder, 0xdc, 0x18);
	105	bt856_write(encoder, 0xda, 0);
	106	bt856_write(encoder, 0xde, 0);
1da177e4	107
a91f56e7 HV	108	bt856_setbit(encoder, 0xdc, 3, 1);
	109	/bt856_setbit(encoder, 0xdc, 6, 0);/
	110	bt856_setbit(encoder, 0xdc, 4, 1);
	111
	112	if (encoder->norm & V4L2_STD_NTSC)
	113	bt856_setbit(encoder, 0xdc, 2, 0);
	114	else
	115	bt856_setbit(encoder, 0xdc, 2, 1);
	116
	117	bt856_setbit(encoder, 0xdc, 1, 1);
	118	bt856_setbit(encoder, 0xde, 4, 0);
	119	bt856_setbit(encoder, 0xde, 3, 1);
	120	if (debug != 0)
	121	bt856_dump(encoder);
	122	return 0;
	123	}
	124
	125	static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
	126	{
	127	struct bt856 *encoder = to_bt856(sd);
	128
cc5cef8e	129	v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
a91f56e7 HV	130
	131	if (std & V4L2_STD_NTSC) {
	132	bt856_setbit(encoder, 0xdc, 2, 0);
	133	} else if (std & V4L2_STD_PAL) {
	134	bt856_setbit(encoder, 0xdc, 2, 1);
	135	bt856_setbit(encoder, 0xda, 0, 0);
	136	/bt856_setbit(encoder, 0xda, 0, 1);/
	137	} else {
	138	return -EINVAL;
a8c26dfe	139	}
a91f56e7 HV	140	encoder->norm = std;
	141	if (debug != 0)
	142	bt856_dump(encoder);
	143	return 0;
	144	}
1da177e4	145
5325b427 HV	146	static int bt856_s_routing(struct v4l2_subdev *sd,
5325b427 HV	147	u32 input, u32 output, u32 config)
a91f56e7 HV	148	{
	149	struct bt856 *encoder = to_bt856(sd);
	150
5325b427	151	v4l2_dbg(1, debug, sd, "set input %d\n", input);
a91f56e7 HV	152
a91f56e7 HV	153	/* We only have video bus.
5325b427 HV	154	* input= 0: input is from bt819
	155	* input= 1: input is from ZR36060 */
	156	switch (input) {
a91f56e7 HV	157	case 0:
	158	bt856_setbit(encoder, 0xde, 4, 0);
	159	bt856_setbit(encoder, 0xde, 3, 1);
	160	bt856_setbit(encoder, 0xdc, 3, 1);
	161	bt856_setbit(encoder, 0xdc, 6, 0);
	162	break;
	163	case 1:
	164	bt856_setbit(encoder, 0xde, 4, 0);
	165	bt856_setbit(encoder, 0xde, 3, 1);
	166	bt856_setbit(encoder, 0xdc, 3, 1);
	167	bt856_setbit(encoder, 0xdc, 6, 1);
	168	break;
	169	case 2: /* Color bar */
	170	bt856_setbit(encoder, 0xdc, 3, 0);
	171	bt856_setbit(encoder, 0xde, 4, 1);
	172	break;
1da177e4 LT	173	default:
	174	return -EINVAL;
	175	}
	176
a91f56e7 HV	177	if (debug != 0)
a91f56e7 HV	178	bt856_dump(encoder);
1da177e4 LT	179	return 0;
	180	}
	181
a91f56e7 HV	182	static int bt856_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
	183	{
	184	struct i2c_client *client = v4l2_get_subdevdata(sd);
	185
	186	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT856, 0);
	187	}
	188
1da177e4 LT	189	/* ----------------------------------------------------------------------- */
1da177e4 LT	190
a91f56e7 HV	191	static const struct v4l2_subdev_core_ops bt856_core_ops = {
	192	.g_chip_ident = bt856_g_chip_ident,
	193	.init = bt856_init,
	194	};
1da177e4	195
a91f56e7 HV	196	static const struct v4l2_subdev_video_ops bt856_video_ops = {
	197	.s_std_output = bt856_s_std_output,
	198	.s_routing = bt856_s_routing,
	199	};
	200
	201	static const struct v4l2_subdev_ops bt856_ops = {
	202	.core = &bt856_core_ops,
	203	.video = &bt856_video_ops,
	204	};
	205
	206	/* ----------------------------------------------------------------------- */
1da177e4	207
a8c26dfe HV	208	static int bt856_probe(struct i2c_client *client,
a8c26dfe HV	209	const struct i2c_device_id *id)
1da177e4	210	{
1da177e4	211	struct bt856 *encoder;
a91f56e7	212	struct v4l2_subdev *sd;
1da177e4	213
1da177e4	214	/* Check if the adapter supports the needed features */
a8c26dfe HV	215	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
a8c26dfe HV	216	return -ENODEV;
1da177e4	217
a8c26dfe HV	218	v4l_info(client, "chip found @ 0x%x (%s)\n",
a8c26dfe HV	219	client->addr << 1, client->adapter->name);
1da177e4	220
7408187d	221	encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
a8c26dfe	222	if (encoder == NULL)
1da177e4	223	return -ENOMEM;
a91f56e7 HV	224	sd = &encoder->sd;
a91f56e7 HV	225	v4l2_i2c_subdev_init(sd, client, &bt856_ops);
107063c6	226	encoder->norm = V4L2_STD_NTSC;
1da177e4	227
a91f56e7 HV	228	bt856_write(encoder, 0xdc, 0x18);
	229	bt856_write(encoder, 0xda, 0);
	230	bt856_write(encoder, 0xde, 0);
1da177e4	231
a91f56e7 HV	232	bt856_setbit(encoder, 0xdc, 3, 1);
	233	/bt856_setbit(encoder, 0xdc, 6, 0);/
	234	bt856_setbit(encoder, 0xdc, 4, 1);
1da177e4	235
107063c6	236	if (encoder->norm & V4L2_STD_NTSC)
a91f56e7	237	bt856_setbit(encoder, 0xdc, 2, 0);
107063c6	238	else
a91f56e7	239	bt856_setbit(encoder, 0xdc, 2, 1);
1da177e4	240
a91f56e7 HV	241	bt856_setbit(encoder, 0xdc, 1, 1);
	242	bt856_setbit(encoder, 0xde, 4, 0);
	243	bt856_setbit(encoder, 0xde, 3, 1);
1da177e4 LT	244
1da177e4 LT	245	if (debug != 0)
a91f56e7	246	bt856_dump(encoder);
1da177e4 LT	247	return 0;
	248	}
	249
a8c26dfe	250	static int bt856_remove(struct i2c_client *client)
1da177e4	251	{
a91f56e7 HV	252	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	253
	254	v4l2_device_unregister_subdev(sd);
	255	kfree(to_bt856(sd));
1da177e4 LT	256	return 0;
	257	}
	258
a8c26dfe HV	259	static const struct i2c_device_id bt856_id[] = {
	260	{ "bt856", 0 },
	261	{ }
	262	};
	263	MODULE_DEVICE_TABLE(i2c, bt856_id);
1da177e4	264
a8c26dfe HV	265	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
a8c26dfe HV	266	.name = "bt856",
a8c26dfe HV	267	.probe = bt856_probe,
	268	.remove = bt856_remove,
	269	.id_table = bt856_id,
1da177e4	270	};