[mirror_ubuntu-artful-kernel.git] / drivers / media / video / upd64083.c

/*
 * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
 *
 * 2003 by T.Adachi (tadachi@tadachi-net.com)
 * 2003 by Takeru KOMORIYA <komoriya@paken.org>
 * 2006 by Hans Verkuil <hverkuil@xs4all.nl>
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-i2c-drv.h>
#include <media/upd64083.h>

MODULE_DESCRIPTION("uPD64083 driver");
MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
MODULE_LICENSE("GPL");

static int debug;
module_param(debug, bool, 0644);

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


enum {
	R00 = 0, R01, R02, R03, R04,
	R05, R06, R07, R08, R09,
	R0A, R0B, R0C, R0D, R0E, R0F,
	R10, R11, R12, R13, R14,
	R15, R16,
	TOT_REGS
};

struct upd64083_state {
	struct v4l2_subdev sd;
	u8 mode;
	u8 ext_y_adc;
	u8 regs[TOT_REGS];
};

static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct upd64083_state, sd);
}

/* Initial values when used in combination with the
   NEC upd64031a ghost reduction chip. */
static u8 upd64083_init[] = {
	0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
	0x36, 0xdd, 0x05, 0x56, 0x48,
	0x00, 0x3a, 0xa0, 0x05, 0x08,
	0x44, 0x60, 0x08, 0x52, 0xf8,
	0x53, 0x60, 0x10
};

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

static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[2];

	buf[0] = reg;
	buf[1] = val;
	v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
	if (i2c_master_send(client, buf, 2) != 2)
		v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
}

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

#ifdef CONFIG_VIDEO_ADV_DEBUG
static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[7];

	if (reg >= sizeof(buf))
		return 0xff;
	i2c_master_recv(client, buf, sizeof(buf));
	return buf[reg];
}
#endif

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

static int upd64083_s_routing(struct v4l2_subdev *sd,
			      u32 input, u32 output, u32 config)
{
	struct upd64083_state *state = to_state(sd);
	u8 r00, r02;

	if (input > 7 || (input & 6) == 6)
		return -EINVAL;
	state->mode = (input & 3) << 6;
	state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3;
	r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
	r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
	upd64083_write(sd, R00, r00);
	upd64083_write(sd, R02, r02);
	return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (!v4l2_chip_match_i2c_client(client, &reg->match))
		return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	reg->val = upd64083_read(sd, reg->reg & 0xff);
	reg->size = 1;
	return 0;
}

static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (!v4l2_chip_match_i2c_client(client, &reg->match))
		return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
	return 0;
}
#endif

static int upd64083_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_UPD64083, 0);
}

static int upd64083_log_status(struct v4l2_subdev *sd)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[7];

	i2c_master_recv(client, buf, 7);
	v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
		      "SA04=%02x SA05=%02x SA06=%02x\n",
		buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
	return 0;
}

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

static const struct v4l2_subdev_core_ops upd64083_core_ops = {
	.log_status = upd64083_log_status,
	.g_chip_ident = upd64083_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register = upd64083_g_register,
	.s_register = upd64083_s_register,
#endif
};

static const struct v4l2_subdev_video_ops upd64083_video_ops = {
	.s_routing = upd64083_s_routing,
};

static const struct v4l2_subdev_ops upd64083_ops = {
	.core = &upd64083_core_ops,
	.video = &upd64083_video_ops,
};

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

/* i2c implementation */

static int upd64083_probe(struct i2c_client *client,
			  const struct i2c_device_id *id)
{
	struct upd64083_state *state;
	struct v4l2_subdev *sd;
	int i;

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

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

	state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
	if (state == NULL)
		return -ENOMEM;
	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
	/* Initially assume that a ghost reduction chip is present */
	state->mode = 0;  /* YCS mode */
	state->ext_y_adc = (1 << 5);
	memcpy(state->regs, upd64083_init, TOT_REGS);
	for (i = 0; i < TOT_REGS; i++)
		upd64083_write(sd, i, state->regs[i]);
	return 0;
}

static int upd64083_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

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

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

static const struct i2c_device_id upd64083_id[] = {
	{ "upd64083", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, upd64083_id);

static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "upd64083",
	.probe = upd64083_probe,
	.remove = upd64083_remove,
	.id_table = upd64083_id,
};
Commit	Line	Data
add953ce HV	1	/*
	2	* upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
	3	*
	4	* 2003 by T.Adachi (tadachi@tadachi-net.com)
	5	* 2003 by Takeru KOMORIYA <komoriya@paken.org>
	6	* 2006 by Hans Verkuil <hverkuil@xs4all.nl>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* as published by the Free Software Foundation; either version 2
	11	* of the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
8c9fc8de HV	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
8c9fc8de HV	21	* 02110-1301, USA.
add953ce HV	22	*/
add953ce HV	23
add953ce HV	24	#include <linux/module.h>
	25	#include <linux/kernel.h>
	26	#include <linux/i2c.h>
	27	#include <linux/videodev2.h>
5a0e3ad6	28	#include <linux/slab.h>
cc7ca3ea	29	#include <media/v4l2-device.h>
74cab31c	30	#include <media/v4l2-chip-ident.h>
f69d419a	31	#include <media/v4l2-i2c-drv.h>
add953ce HV	32	#include <media/upd64083.h>
	33
	34	MODULE_DESCRIPTION("uPD64083 driver");
	35	MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
	36	MODULE_LICENSE("GPL");
	37
8c9fc8de	38	static int debug;
add953ce HV	39	module_param(debug, bool, 0644);
	40
	41	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	42
add953ce HV	43
	44	enum {
	45	R00 = 0, R01, R02, R03, R04,
	46	R05, R06, R07, R08, R09,
	47	R0A, R0B, R0C, R0D, R0E, R0F,
	48	R10, R11, R12, R13, R14,
	49	R15, R16,
	50	TOT_REGS
	51	};
	52
	53	struct upd64083_state {
cc7ca3ea	54	struct v4l2_subdev sd;
add953ce HV	55	u8 mode;
	56	u8 ext_y_adc;
	57	u8 regs[TOT_REGS];
	58	};
	59
cc7ca3ea HV	60	static inline struct upd64083_state to_state(struct v4l2_subdev sd)
	61	{
	62	return container_of(sd, struct upd64083_state, sd);
	63	}
	64
add953ce HV	65	/* Initial values when used in combination with the
	66	NEC upd64031a ghost reduction chip. */
	67	static u8 upd64083_init[] = {
	68	0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */
	69	0x36, 0xdd, 0x05, 0x56, 0x48,
	70	0x00, 0x3a, 0xa0, 0x05, 0x08,
	71	0x44, 0x60, 0x08, 0x52, 0xf8,
	72	0x53, 0x60, 0x10
	73	};
	74
	75	/* ------------------------------------------------------------------------ */
	76
cc7ca3ea	77	static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)
add953ce	78	{
cc7ca3ea	79	struct i2c_client *client = v4l2_get_subdevdata(sd);
add953ce HV	80	u8 buf[2];
	81
	82	buf[0] = reg;
	83	buf[1] = val;
cc7ca3ea	84	v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
add953ce	85	if (i2c_master_send(client, buf, 2) != 2)
cc7ca3ea	86	v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
add953ce HV	87	}
	88
	89	/* ------------------------------------------------------------------------ */
	90
	91	#ifdef CONFIG_VIDEO_ADV_DEBUG
cc7ca3ea	92	static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
add953ce	93	{
cc7ca3ea	94	struct i2c_client *client = v4l2_get_subdevdata(sd);
add953ce HV	95	u8 buf[7];
	96
	97	if (reg >= sizeof(buf))
	98	return 0xff;
	99	i2c_master_recv(client, buf, sizeof(buf));
	100	return buf[reg];
	101	}
	102	#endif
	103
	104	/* ------------------------------------------------------------------------ */
	105
5325b427 HV	106	static int upd64083_s_routing(struct v4l2_subdev *sd,
5325b427 HV	107	u32 input, u32 output, u32 config)
add953ce	108	{
cc7ca3ea HV	109	struct upd64083_state *state = to_state(sd);
	110	u8 r00, r02;
	111
5325b427	112	if (input > 7 \|\| (input & 6) == 6)
cc7ca3ea	113	return -EINVAL;
5325b427 HV	114	state->mode = (input & 3) << 6;
5325b427 HV	115	state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3;
cc7ca3ea HV	116	r00 = (state->regs[R00] & ~(3 << 6)) \| state->mode;
	117	r02 = (state->regs[R02] & ~(1 << 5)) \| state->ext_y_adc;
	118	upd64083_write(sd, R00, r00);
	119	upd64083_write(sd, R02, r02);
	120	return 0;
	121	}
add953ce HV	122
add953ce HV	123	#ifdef CONFIG_VIDEO_ADV_DEBUG
aecde8b5	124	static int upd64083_g_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
cc7ca3ea HV	125	{
	126	struct i2c_client *client = v4l2_get_subdevdata(sd);
	127
aecde8b5	128	if (!v4l2_chip_match_i2c_client(client, &reg->match))
cc7ca3ea HV	129	return -EINVAL;
	130	if (!capable(CAP_SYS_ADMIN))
	131	return -EPERM;
	132	reg->val = upd64083_read(sd, reg->reg & 0xff);
aecde8b5	133	reg->size = 1;
cc7ca3ea HV	134	return 0;
cc7ca3ea HV	135	}
add953ce	136
aecde8b5	137	static int upd64083_s_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
cc7ca3ea HV	138	{
	139	struct i2c_client *client = v4l2_get_subdevdata(sd);
	140
aecde8b5	141	if (!v4l2_chip_match_i2c_client(client, &reg->match))
cc7ca3ea HV	142	return -EINVAL;
	143	if (!capable(CAP_SYS_ADMIN))
	144	return -EPERM;
	145	upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
	146	return 0;
	147	}
add953ce	148	#endif
74cab31c	149
aecde8b5	150	static int upd64083_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
cc7ca3ea HV	151	{
	152	struct i2c_client *client = v4l2_get_subdevdata(sd);
	153
	154	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0);
	155	}
74cab31c	156
cc7ca3ea HV	157	static int upd64083_log_status(struct v4l2_subdev *sd)
	158	{
	159	struct i2c_client *client = v4l2_get_subdevdata(sd);
	160	u8 buf[7];
add953ce	161
cc7ca3ea HV	162	i2c_master_recv(client, buf, 7);
	163	v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
	164	"SA04=%02x SA05=%02x SA06=%02x\n",
	165	buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
add953ce HV	166	return 0;
	167	}
	168
cc7ca3ea HV	169	/* ----------------------------------------------------------------------- */
	170
	171	static const struct v4l2_subdev_core_ops upd64083_core_ops = {
	172	.log_status = upd64083_log_status,
	173	.g_chip_ident = upd64083_g_chip_ident,
	174	#ifdef CONFIG_VIDEO_ADV_DEBUG
	175	.g_register = upd64083_g_register,
	176	.s_register = upd64083_s_register,
	177	#endif
	178	};
	179
	180	static const struct v4l2_subdev_video_ops upd64083_video_ops = {
	181	.s_routing = upd64083_s_routing,
	182	};
	183
	184	static const struct v4l2_subdev_ops upd64083_ops = {
	185	.core = &upd64083_core_ops,
	186	.video = &upd64083_video_ops,
	187	};
	188
add953ce HV	189	/* ------------------------------------------------------------------------ */
	190
	191	/* i2c implementation */
	192
d2653e92 JD	193	static int upd64083_probe(struct i2c_client *client,
d2653e92 JD	194	const struct i2c_device_id *id)
add953ce	195	{
add953ce	196	struct upd64083_state *state;
cc7ca3ea	197	struct v4l2_subdev *sd;
add953ce HV	198	int i;
add953ce HV	199
26666977	200	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
188f3457	201	return -EIO;
add953ce	202
8c9fc8de HV	203	v4l_info(client, "chip found @ 0x%x (%s)\n",
8c9fc8de HV	204	client->addr << 1, client->adapter->name);
add953ce HV	205
add953ce HV	206	state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
8c9fc8de	207	if (state == NULL)
add953ce	208	return -ENOMEM;
cc7ca3ea HV	209	sd = &state->sd;
cc7ca3ea HV	210	v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
add953ce HV	211	/* Initially assume that a ghost reduction chip is present */
	212	state->mode = 0; /* YCS mode */
	213	state->ext_y_adc = (1 << 5);
	214	memcpy(state->regs, upd64083_init, TOT_REGS);
8c9fc8de	215	for (i = 0; i < TOT_REGS; i++)
cc7ca3ea	216	upd64083_write(sd, i, state->regs[i]);
add953ce HV	217	return 0;
	218	}
	219
26666977	220	static int upd64083_remove(struct i2c_client *client)
add953ce	221	{
cc7ca3ea HV	222	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	223
	224	v4l2_device_unregister_subdev(sd);
	225	kfree(to_state(sd));
add953ce HV	226	return 0;
	227	}
	228
	229	/* ----------------------------------------------------------------------- */
	230
af294867 JD	231	static const struct i2c_device_id upd64083_id[] = {
	232	{ "upd64083", 0 },
	233	{ }
	234	};
	235	MODULE_DEVICE_TABLE(i2c, upd64083_id);
26666977 HV	236
	237	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	238	.name = "upd64083",
26666977 HV	239	.probe = upd64083_probe,
26666977 HV	240	.remove = upd64083_remove,
af294867	241	.id_table = upd64083_id,
add953ce	242	};