[mirror_ubuntu-bionic-kernel.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/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.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 i2c_driver bt856_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "bt856",
	},
	.probe		= bt856_probe,
	.remove		= bt856_remove,
	.id_table	= bt856_id,
};

static __init int init_bt856(void)
{
	return i2c_add_driver(&bt856_driver);
}

static __exit void exit_bt856(void)
{
	i2c_del_driver(&bt856_driver);
}

module_init(init_bt856);
module_exit(exit_bt856);
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	36	#include <linux/i2c.h>
a91f56e7 HV	37	#include <linux/videodev2.h>
	38	#include <media/v4l2-device.h>
	39	#include <media/v4l2-chip-ident.h>
1da177e4 LT	40
	41	MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
	42	MODULE_AUTHOR("Mike Bernson & Dave Perks");
	43	MODULE_LICENSE("GPL");
	44
ff699e6b	45	static int debug;
1da177e4 LT	46	module_param(debug, int, 0);
	47	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	48
a91f56e7	49
1da177e4 LT	50	/* ----------------------------------------------------------------------- */
1da177e4 LT	51
187565c4 HV	52	#define BT856_REG_OFFSET 0xDA
187565c4 HV	53	#define BT856_NR_REG 6
1da177e4 LT	54
1da177e4 LT	55	struct bt856 {
a91f56e7	56	struct v4l2_subdev sd;
f49a5eae	57	unsigned char reg[BT856_NR_REG];
1da177e4	58
107063c6	59	v4l2_std_id norm;
1da177e4 LT	60	};
1da177e4 LT	61
a91f56e7 HV	62	static inline struct bt856 to_bt856(struct v4l2_subdev sd)
	63	{
	64	return container_of(sd, struct bt856, sd);
	65	}
	66
1da177e4 LT	67	/* ----------------------------------------------------------------------- */
1da177e4 LT	68
a91f56e7	69	static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value)
1da177e4	70	{
a91f56e7	71	struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
1da177e4	72
187565c4	73	encoder->reg[reg - BT856_REG_OFFSET] = value;
1da177e4 LT	74	return i2c_smbus_write_byte_data(client, reg, value);
	75	}
	76
a91f56e7	77	static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value)
1da177e4	78	{
a91f56e7	79	return bt856_write(encoder, reg,
a8c26dfe HV	80	(encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) \|
a8c26dfe HV	81	(value ? (1 << bit) : 0));
1da177e4 LT	82	}
1da177e4 LT	83
a91f56e7	84	static void bt856_dump(struct bt856 *encoder)
1da177e4 LT	85	{
1da177e4 LT	86	int i;
1da177e4	87
a91f56e7	88	v4l2_info(&encoder->sd, "register dump:\n");
f49a5eae	89	for (i = 0; i < BT856_NR_REG; i += 2)
a8c26dfe HV	90	printk(KERN_CONT " %02x", encoder->reg[i]);
a8c26dfe HV	91	printk(KERN_CONT "\n");
1da177e4 LT	92	}
	93
	94	/* ----------------------------------------------------------------------- */
	95
a91f56e7	96	static int bt856_init(struct v4l2_subdev *sd, u32 arg)
1da177e4	97	{
a91f56e7	98	struct bt856 *encoder = to_bt856(sd);
1da177e4	99
a91f56e7 HV	100	/* This is just for testing!!! */
	101	v4l2_dbg(1, debug, sd, "init\n");
	102	bt856_write(encoder, 0xdc, 0x18);
	103	bt856_write(encoder, 0xda, 0);
	104	bt856_write(encoder, 0xde, 0);
1da177e4	105
a91f56e7 HV	106	bt856_setbit(encoder, 0xdc, 3, 1);
	107	/bt856_setbit(encoder, 0xdc, 6, 0);/
	108	bt856_setbit(encoder, 0xdc, 4, 1);
	109
	110	if (encoder->norm & V4L2_STD_NTSC)
	111	bt856_setbit(encoder, 0xdc, 2, 0);
	112	else
	113	bt856_setbit(encoder, 0xdc, 2, 1);
	114
	115	bt856_setbit(encoder, 0xdc, 1, 1);
	116	bt856_setbit(encoder, 0xde, 4, 0);
	117	bt856_setbit(encoder, 0xde, 3, 1);
	118	if (debug != 0)
	119	bt856_dump(encoder);
	120	return 0;
	121	}
	122
	123	static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
	124	{
	125	struct bt856 *encoder = to_bt856(sd);
	126
cc5cef8e	127	v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
a91f56e7 HV	128
	129	if (std & V4L2_STD_NTSC) {
	130	bt856_setbit(encoder, 0xdc, 2, 0);
	131	} else if (std & V4L2_STD_PAL) {
	132	bt856_setbit(encoder, 0xdc, 2, 1);
	133	bt856_setbit(encoder, 0xda, 0, 0);
	134	/bt856_setbit(encoder, 0xda, 0, 1);/
	135	} else {
	136	return -EINVAL;
a8c26dfe	137	}
a91f56e7 HV	138	encoder->norm = std;
	139	if (debug != 0)
	140	bt856_dump(encoder);
	141	return 0;
	142	}
1da177e4	143
5325b427 HV	144	static int bt856_s_routing(struct v4l2_subdev *sd,
5325b427 HV	145	u32 input, u32 output, u32 config)
a91f56e7 HV	146	{
	147	struct bt856 *encoder = to_bt856(sd);
	148
5325b427	149	v4l2_dbg(1, debug, sd, "set input %d\n", input);
a91f56e7 HV	150
a91f56e7 HV	151	/* We only have video bus.
5325b427 HV	152	* input= 0: input is from bt819
	153	* input= 1: input is from ZR36060 */
	154	switch (input) {
a91f56e7 HV	155	case 0:
	156	bt856_setbit(encoder, 0xde, 4, 0);
	157	bt856_setbit(encoder, 0xde, 3, 1);
	158	bt856_setbit(encoder, 0xdc, 3, 1);
	159	bt856_setbit(encoder, 0xdc, 6, 0);
	160	break;
	161	case 1:
	162	bt856_setbit(encoder, 0xde, 4, 0);
	163	bt856_setbit(encoder, 0xde, 3, 1);
	164	bt856_setbit(encoder, 0xdc, 3, 1);
	165	bt856_setbit(encoder, 0xdc, 6, 1);
	166	break;
	167	case 2: /* Color bar */
	168	bt856_setbit(encoder, 0xdc, 3, 0);
	169	bt856_setbit(encoder, 0xde, 4, 1);
	170	break;
1da177e4 LT	171	default:
	172	return -EINVAL;
	173	}
	174
a91f56e7 HV	175	if (debug != 0)
a91f56e7 HV	176	bt856_dump(encoder);
1da177e4 LT	177	return 0;
	178	}
	179
a91f56e7 HV	180	static int bt856_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
	181	{
	182	struct i2c_client *client = v4l2_get_subdevdata(sd);
	183
	184	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT856, 0);
	185	}
	186
1da177e4 LT	187	/* ----------------------------------------------------------------------- */
1da177e4 LT	188
a91f56e7 HV	189	static const struct v4l2_subdev_core_ops bt856_core_ops = {
	190	.g_chip_ident = bt856_g_chip_ident,
	191	.init = bt856_init,
	192	};
1da177e4	193
a91f56e7 HV	194	static const struct v4l2_subdev_video_ops bt856_video_ops = {
	195	.s_std_output = bt856_s_std_output,
	196	.s_routing = bt856_s_routing,
	197	};
	198
	199	static const struct v4l2_subdev_ops bt856_ops = {
	200	.core = &bt856_core_ops,
	201	.video = &bt856_video_ops,
	202	};
	203
	204	/* ----------------------------------------------------------------------- */
1da177e4	205
a8c26dfe HV	206	static int bt856_probe(struct i2c_client *client,
a8c26dfe HV	207	const struct i2c_device_id *id)
1da177e4	208	{
1da177e4	209	struct bt856 *encoder;
a91f56e7	210	struct v4l2_subdev *sd;
1da177e4	211
1da177e4	212	/* Check if the adapter supports the needed features */
a8c26dfe HV	213	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
a8c26dfe HV	214	return -ENODEV;
1da177e4	215
a8c26dfe HV	216	v4l_info(client, "chip found @ 0x%x (%s)\n",
a8c26dfe HV	217	client->addr << 1, client->adapter->name);
1da177e4	218
7408187d	219	encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
a8c26dfe	220	if (encoder == NULL)
1da177e4	221	return -ENOMEM;
a91f56e7 HV	222	sd = &encoder->sd;
a91f56e7 HV	223	v4l2_i2c_subdev_init(sd, client, &bt856_ops);
107063c6	224	encoder->norm = V4L2_STD_NTSC;
1da177e4	225
a91f56e7 HV	226	bt856_write(encoder, 0xdc, 0x18);
	227	bt856_write(encoder, 0xda, 0);
	228	bt856_write(encoder, 0xde, 0);
1da177e4	229
a91f56e7 HV	230	bt856_setbit(encoder, 0xdc, 3, 1);
	231	/bt856_setbit(encoder, 0xdc, 6, 0);/
	232	bt856_setbit(encoder, 0xdc, 4, 1);
1da177e4	233
107063c6	234	if (encoder->norm & V4L2_STD_NTSC)
a91f56e7	235	bt856_setbit(encoder, 0xdc, 2, 0);
107063c6	236	else
a91f56e7	237	bt856_setbit(encoder, 0xdc, 2, 1);
1da177e4	238
a91f56e7 HV	239	bt856_setbit(encoder, 0xdc, 1, 1);
	240	bt856_setbit(encoder, 0xde, 4, 0);
	241	bt856_setbit(encoder, 0xde, 3, 1);
1da177e4 LT	242
1da177e4 LT	243	if (debug != 0)
a91f56e7	244	bt856_dump(encoder);
1da177e4 LT	245	return 0;
	246	}
	247
a8c26dfe	248	static int bt856_remove(struct i2c_client *client)
1da177e4	249	{
a91f56e7 HV	250	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	251
	252	v4l2_device_unregister_subdev(sd);
	253	kfree(to_bt856(sd));
1da177e4 LT	254	return 0;
	255	}
	256
a8c26dfe HV	257	static const struct i2c_device_id bt856_id[] = {
	258	{ "bt856", 0 },
	259	{ }
	260	};
	261	MODULE_DEVICE_TABLE(i2c, bt856_id);
1da177e4	262
3f417200 HV	263	static struct i2c_driver bt856_driver = {
	264	.driver = {
	265	.owner = THIS_MODULE,
	266	.name = "bt856",
	267	},
	268	.probe = bt856_probe,
	269	.remove = bt856_remove,
	270	.id_table = bt856_id,
1da177e4	271	};
3f417200 HV	272
	273	static __init int init_bt856(void)
	274	{
	275	return i2c_add_driver(&bt856_driver);
	276	}
	277
	278	static __exit void exit_bt856(void)
	279	{
	280	i2c_del_driver(&bt856_driver);
	281	}
	282
	283	module_init(init_bt856);
	284	module_exit(exit_bt856);