[mirror_ubuntu-artful-kernel.git] / drivers / media / video / cs5345.c

/*
 * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
 * Copyright (C) 2007 Hans Verkuil
 *
 * 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/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-i2c-drv.h>

MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
MODULE_AUTHOR("Hans Verkuil");
MODULE_LICENSE("GPL");

static int debug;

module_param(debug, bool, 0644);

MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");


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

static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return i2c_smbus_write_byte_data(client, reg, value);
}

static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return i2c_smbus_read_byte_data(client, reg);
}

static int cs5345_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
{
	if ((route->input & 0xf) > 6) {
		v4l2_err(sd, "Invalid input %d.\n", route->input);
		return -EINVAL;
	}
	cs5345_write(sd, 0x09, route->input & 0xf);
	cs5345_write(sd, 0x05, route->input & 0xf0);
	return 0;
}

static int cs5345_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
		ctrl->value = (cs5345_read(sd, 0x04) & 0x08) != 0;
		return 0;
	}
	if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
		return -EINVAL;
	ctrl->value = cs5345_read(sd, 0x07) & 0x3f;
	if (ctrl->value >= 32)
		ctrl->value = ctrl->value - 64;
	return 0;
}

static int cs5345_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
		cs5345_write(sd, 0x04, ctrl->value ? 0x80 : 0);
		return 0;
	}
	if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
		return -EINVAL;
	if (ctrl->value > 24 || ctrl->value < -24)
		return -EINVAL;
	cs5345_write(sd, 0x07, ((u8)ctrl->value) & 0x3f);
	cs5345_write(sd, 0x08, ((u8)ctrl->value) & 0x3f);
	return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (!v4l2_chip_match_i2c_client(client,
				reg->match_type, reg->match_chip))
		return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	reg->val = cs5345_read(sd, reg->reg & 0x1f);
	return 0;
}

static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (!v4l2_chip_match_i2c_client(client,
				reg->match_type, reg->match_chip))
		return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
	return 0;
}
#endif

static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_chip_ident *chip)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
}

static int cs5345_log_status(struct v4l2_subdev *sd)
{
	u8 v = cs5345_read(sd, 0x09) & 7;
	u8 m = cs5345_read(sd, 0x04);
	int vol = cs5345_read(sd, 0x08) & 0x3f;

	v4l2_info(sd, "Input:  %d%s\n", v,
			(m & 0x80) ? " (muted)" : "");
	if (vol >= 32)
		vol = vol - 64;
	v4l2_info(sd, "Volume: %d dB\n", vol);
	return 0;
}

static int cs5345_command(struct i2c_client *client, unsigned cmd, void *arg)
{
	return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
}

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

static const struct v4l2_subdev_core_ops cs5345_core_ops = {
	.log_status = cs5345_log_status,
	.g_chip_ident = cs5345_g_chip_ident,
	.g_ctrl = cs5345_g_ctrl,
	.s_ctrl = cs5345_s_ctrl,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register = cs5345_g_register,
	.s_register = cs5345_s_register,
#endif
};

static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
	.s_routing = cs5345_s_routing,
};

static const struct v4l2_subdev_ops cs5345_ops = {
	.core = &cs5345_core_ops,
	.audio = &cs5345_audio_ops,
};

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

static int cs5345_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct v4l2_subdev *sd;

	/* Check if the adapter supports the needed features */
	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);

	sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
	if (sd == NULL)
		return -ENOMEM;
	v4l2_i2c_subdev_init(sd, client, &cs5345_ops);

	cs5345_write(sd, 0x02, 0x00);
	cs5345_write(sd, 0x04, 0x01);
	cs5345_write(sd, 0x09, 0x01);
	return 0;
}

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

static int cs5345_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

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

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

static const struct i2c_device_id cs5345_id[] = {
	{ "cs5345", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, cs5345_id);

static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "cs5345",
	.driverid = I2C_DRIVERID_CS5345,
	.command = cs5345_command,
	.probe = cs5345_probe,
	.remove = cs5345_remove,
	.id_table = cs5345_id,
};
Commit	Line	Data
6fb377f8 HV	1	/*
	2	* cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
	3	* Copyright (C) 2007 Hans Verkuil
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	18	*/
	19
	20
	21	#include <linux/version.h>
	22	#include <linux/module.h>
	23	#include <linux/kernel.h>
	24	#include <linux/i2c.h>
	25	#include <linux/videodev2.h>
b3ee7e21	26	#include <media/v4l2-device.h>
6fb377f8	27	#include <media/v4l2-chip-ident.h>
b3ee7e21	28	#include <media/v4l2-i2c-drv.h>
6fb377f8 HV	29
	30	MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
	31	MODULE_AUTHOR("Hans Verkuil");
	32	MODULE_LICENSE("GPL");
	33
	34	static int debug;
	35
	36	module_param(debug, bool, 0644);
	37
61a2d07d	38	MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
6fb377f8 HV	39
	40
	41	/* ----------------------------------------------------------------------- */
	42
b3ee7e21	43	static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
6fb377f8	44	{
b3ee7e21 HV	45	struct i2c_client *client = v4l2_get_subdevdata(sd);
b3ee7e21 HV	46
6fb377f8 HV	47	return i2c_smbus_write_byte_data(client, reg, value);
	48	}
	49
b3ee7e21	50	static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
6fb377f8	51	{
b3ee7e21 HV	52	struct i2c_client *client = v4l2_get_subdevdata(sd);
b3ee7e21 HV	53
6fb377f8 HV	54	return i2c_smbus_read_byte_data(client, reg);
	55	}
	56
b3ee7e21	57	static int cs5345_s_routing(struct v4l2_subdev sd, const struct v4l2_routing route)
6fb377f8	58	{
b3ee7e21 HV	59	if ((route->input & 0xf) > 6) {
	60	v4l2_err(sd, "Invalid input %d.\n", route->input);
	61	return -EINVAL;
6fb377f8	62	}
b3ee7e21 HV	63	cs5345_write(sd, 0x09, route->input & 0xf);
	64	cs5345_write(sd, 0x05, route->input & 0xf0);
	65	return 0;
	66	}
6fb377f8	67
b3ee7e21 HV	68	static int cs5345_g_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	69	{
	70	if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
	71	ctrl->value = (cs5345_read(sd, 0x04) & 0x08) != 0;
	72	return 0;
	73	}
	74	if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
6fb377f8	75	return -EINVAL;
b3ee7e21 HV	76	ctrl->value = cs5345_read(sd, 0x07) & 0x3f;
	77	if (ctrl->value >= 32)
	78	ctrl->value = ctrl->value - 64;
	79	return 0;
	80	}
	81
	82	static int cs5345_s_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	83	{
	84	if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
	85	cs5345_write(sd, 0x04, ctrl->value ? 0x80 : 0);
	86	return 0;
6fb377f8	87	}
b3ee7e21 HV	88	if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
	89	return -EINVAL;
	90	if (ctrl->value > 24 \|\| ctrl->value < -24)
	91	return -EINVAL;
	92	cs5345_write(sd, 0x07, ((u8)ctrl->value) & 0x3f);
	93	cs5345_write(sd, 0x08, ((u8)ctrl->value) & 0x3f);
	94	return 0;
	95	}
	96
	97	#ifdef CONFIG_VIDEO_ADV_DEBUG
	98	static int cs5345_g_register(struct v4l2_subdev sd, struct v4l2_register reg)
	99	{
	100	struct i2c_client *client = v4l2_get_subdevdata(sd);
	101
	102	if (!v4l2_chip_match_i2c_client(client,
	103	reg->match_type, reg->match_chip))
	104	return -EINVAL;
	105	if (!capable(CAP_SYS_ADMIN))
	106	return -EPERM;
	107	reg->val = cs5345_read(sd, reg->reg & 0x1f);
	108	return 0;
	109	}
	110
	111	static int cs5345_s_register(struct v4l2_subdev sd, struct v4l2_register reg)
	112	{
	113	struct i2c_client *client = v4l2_get_subdevdata(sd);
	114
	115	if (!v4l2_chip_match_i2c_client(client,
	116	reg->match_type, reg->match_chip))
	117	return -EINVAL;
	118	if (!capable(CAP_SYS_ADMIN))
	119	return -EPERM;
	120	cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
6fb377f8 HV	121	return 0;
6fb377f8 HV	122	}
b3ee7e21 HV	123	#endif
	124
	125	static int cs5345_g_chip_ident(struct v4l2_subdev sd, struct v4l2_chip_ident chip)
	126	{
	127	struct i2c_client *client = v4l2_get_subdevdata(sd);
	128
	129	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
	130	}
	131
	132	static int cs5345_log_status(struct v4l2_subdev *sd)
	133	{
	134	u8 v = cs5345_read(sd, 0x09) & 7;
	135	u8 m = cs5345_read(sd, 0x04);
	136	int vol = cs5345_read(sd, 0x08) & 0x3f;
	137
	138	v4l2_info(sd, "Input: %d%s\n", v,
	139	(m & 0x80) ? " (muted)" : "");
	140	if (vol >= 32)
	141	vol = vol - 64;
	142	v4l2_info(sd, "Volume: %d dB\n", vol);
	143	return 0;
	144	}
	145
	146	static int cs5345_command(struct i2c_client client, unsigned cmd, void arg)
	147	{
	148	return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
	149	}
	150
	151	/* ----------------------------------------------------------------------- */
	152
	153	static const struct v4l2_subdev_core_ops cs5345_core_ops = {
	154	.log_status = cs5345_log_status,
	155	.g_chip_ident = cs5345_g_chip_ident,
	156	.g_ctrl = cs5345_g_ctrl,
	157	.s_ctrl = cs5345_s_ctrl,
	158	#ifdef CONFIG_VIDEO_ADV_DEBUG
	159	.g_register = cs5345_g_register,
	160	.s_register = cs5345_s_register,
	161	#endif
	162	};
	163
	164	static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
	165	.s_routing = cs5345_s_routing,
	166	};
	167
	168	static const struct v4l2_subdev_ops cs5345_ops = {
	169	.core = &cs5345_core_ops,
	170	.audio = &cs5345_audio_ops,
	171	};
6fb377f8 HV	172
	173	/* ----------------------------------------------------------------------- */
	174
d2653e92 JD	175	static int cs5345_probe(struct i2c_client *client,
d2653e92 JD	176	const struct i2c_device_id *id)
6fb377f8	177	{
b3ee7e21 HV	178	struct v4l2_subdev *sd;
b3ee7e21 HV	179
6fb377f8 HV	180	/* Check if the adapter supports the needed features */
	181	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	182	return -EIO;
	183
	184	v4l_info(client, "chip found @ 0x%x (%s)\n",
	185	client->addr << 1, client->adapter->name);
	186
b3ee7e21 HV	187	sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
	188	if (sd == NULL)
	189	return -ENOMEM;
	190	v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
	191
	192	cs5345_write(sd, 0x02, 0x00);
	193	cs5345_write(sd, 0x04, 0x01);
	194	cs5345_write(sd, 0x09, 0x01);
	195	return 0;
	196	}
	197
	198	/* ----------------------------------------------------------------------- */
	199
	200	static int cs5345_remove(struct i2c_client *client)
	201	{
	202	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	203
	204	v4l2_device_unregister_subdev(sd);
	205	kfree(sd);
6fb377f8 HV	206	return 0;
	207	}
	208
	209	/* ----------------------------------------------------------------------- */
	210
af294867 JD	211	static const struct i2c_device_id cs5345_id[] = {
	212	{ "cs5345", 0 },
	213	{ }
	214	};
	215	MODULE_DEVICE_TABLE(i2c, cs5345_id);
	216
6fb377f8 HV	217	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	218	.name = "cs5345",
	219	.driverid = I2C_DRIVERID_CS5345,
	220	.command = cs5345_command,
	221	.probe = cs5345_probe,
b3ee7e21	222	.remove = cs5345_remove,
af294867	223	.id_table = cs5345_id,
6fb377f8	224	};