[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/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>

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,
			    u32 input, u32 output, u32 config)
{
	if ((input & 0xf) > 6) {
		v4l2_err(sd, "Invalid input %d.\n", input);
		return -EINVAL;
	}
	cs5345_write(sd, 0x09, input & 0xf);
	cs5345_write(sd, 0x05, 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_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->size = 1;
	reg->val = cs5345_read(sd, reg->reg & 0x1f);
	return 0;
}

static int cs5345_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;
	cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
	return 0;
}
#endif

static int cs5345_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_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 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 i2c_driver cs5345_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "cs5345",
	},
	.probe		= cs5345_probe,
	.remove		= cs5345_remove,
	.id_table	= cs5345_id,
};

static __init int init_cs5345(void)
{
	return i2c_add_driver(&cs5345_driver);
}

static __exit void exit_cs5345(void)
{
	i2c_del_driver(&cs5345_driver);
}

module_init(init_cs5345);
module_exit(exit_cs5345);
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
6fb377f8 HV	21	#include <linux/module.h>
	22	#include <linux/kernel.h>
	23	#include <linux/i2c.h>
	24	#include <linux/videodev2.h>
5a0e3ad6	25	#include <linux/slab.h>
b3ee7e21	26	#include <media/v4l2-device.h>
6fb377f8 HV	27	#include <media/v4l2-chip-ident.h>
	28
	29	MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
	30	MODULE_AUTHOR("Hans Verkuil");
	31	MODULE_LICENSE("GPL");
	32
	33	static int debug;
	34
	35	module_param(debug, bool, 0644);
	36
61a2d07d	37	MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
6fb377f8 HV	38
	39
	40	/* ----------------------------------------------------------------------- */
	41
b3ee7e21	42	static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
6fb377f8	43	{
b3ee7e21 HV	44	struct i2c_client *client = v4l2_get_subdevdata(sd);
b3ee7e21 HV	45
6fb377f8 HV	46	return i2c_smbus_write_byte_data(client, reg, value);
	47	}
	48
b3ee7e21	49	static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
6fb377f8	50	{
b3ee7e21 HV	51	struct i2c_client *client = v4l2_get_subdevdata(sd);
b3ee7e21 HV	52
6fb377f8 HV	53	return i2c_smbus_read_byte_data(client, reg);
	54	}
	55
5325b427 HV	56	static int cs5345_s_routing(struct v4l2_subdev *sd,
5325b427 HV	57	u32 input, u32 output, u32 config)
6fb377f8	58	{
5325b427 HV	59	if ((input & 0xf) > 6) {
5325b427 HV	60	v4l2_err(sd, "Invalid input %d.\n", input);
b3ee7e21	61	return -EINVAL;
6fb377f8	62	}
5325b427 HV	63	cs5345_write(sd, 0x09, input & 0xf);
5325b427 HV	64	cs5345_write(sd, 0x05, input & 0xf0);
b3ee7e21 HV	65	return 0;
b3ee7e21 HV	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
aecde8b5	98	static int cs5345_g_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
b3ee7e21 HV	99	{
	100	struct i2c_client *client = v4l2_get_subdevdata(sd);
	101
aecde8b5	102	if (!v4l2_chip_match_i2c_client(client, &reg->match))
b3ee7e21 HV	103	return -EINVAL;
	104	if (!capable(CAP_SYS_ADMIN))
	105	return -EPERM;
aecde8b5	106	reg->size = 1;
b3ee7e21 HV	107	reg->val = cs5345_read(sd, reg->reg & 0x1f);
	108	return 0;
	109	}
	110
aecde8b5	111	static int cs5345_s_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
b3ee7e21 HV	112	{
	113	struct i2c_client *client = v4l2_get_subdevdata(sd);
	114
aecde8b5	115	if (!v4l2_chip_match_i2c_client(client, &reg->match))
b3ee7e21 HV	116	return -EINVAL;
	117	if (!capable(CAP_SYS_ADMIN))
	118	return -EPERM;
	119	cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
6fb377f8 HV	120	return 0;
6fb377f8 HV	121	}
b3ee7e21 HV	122	#endif
b3ee7e21 HV	123
aecde8b5	124	static int cs5345_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
b3ee7e21 HV	125	{
	126	struct i2c_client *client = v4l2_get_subdevdata(sd);
	127
	128	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
	129	}
	130
	131	static int cs5345_log_status(struct v4l2_subdev *sd)
	132	{
	133	u8 v = cs5345_read(sd, 0x09) & 7;
	134	u8 m = cs5345_read(sd, 0x04);
	135	int vol = cs5345_read(sd, 0x08) & 0x3f;
	136
	137	v4l2_info(sd, "Input: %d%s\n", v,
	138	(m & 0x80) ? " (muted)" : "");
	139	if (vol >= 32)
	140	vol = vol - 64;
	141	v4l2_info(sd, "Volume: %d dB\n", vol);
	142	return 0;
	143	}
	144
b3ee7e21 HV	145	/* ----------------------------------------------------------------------- */
	146
	147	static const struct v4l2_subdev_core_ops cs5345_core_ops = {
	148	.log_status = cs5345_log_status,
	149	.g_chip_ident = cs5345_g_chip_ident,
	150	.g_ctrl = cs5345_g_ctrl,
	151	.s_ctrl = cs5345_s_ctrl,
	152	#ifdef CONFIG_VIDEO_ADV_DEBUG
	153	.g_register = cs5345_g_register,
	154	.s_register = cs5345_s_register,
	155	#endif
	156	};
	157
	158	static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
	159	.s_routing = cs5345_s_routing,
	160	};
	161
	162	static const struct v4l2_subdev_ops cs5345_ops = {
	163	.core = &cs5345_core_ops,
	164	.audio = &cs5345_audio_ops,
	165	};
6fb377f8 HV	166
	167	/* ----------------------------------------------------------------------- */
	168
d2653e92 JD	169	static int cs5345_probe(struct i2c_client *client,
d2653e92 JD	170	const struct i2c_device_id *id)
6fb377f8	171	{
b3ee7e21 HV	172	struct v4l2_subdev *sd;
b3ee7e21 HV	173
6fb377f8 HV	174	/* Check if the adapter supports the needed features */
	175	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	176	return -EIO;
	177
	178	v4l_info(client, "chip found @ 0x%x (%s)\n",
	179	client->addr << 1, client->adapter->name);
	180
b3ee7e21 HV	181	sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
	182	if (sd == NULL)
	183	return -ENOMEM;
	184	v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
	185
	186	cs5345_write(sd, 0x02, 0x00);
	187	cs5345_write(sd, 0x04, 0x01);
	188	cs5345_write(sd, 0x09, 0x01);
	189	return 0;
	190	}
	191
	192	/* ----------------------------------------------------------------------- */
	193
	194	static int cs5345_remove(struct i2c_client *client)
	195	{
	196	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	197
	198	v4l2_device_unregister_subdev(sd);
	199	kfree(sd);
6fb377f8 HV	200	return 0;
	201	}
	202
	203	/* ----------------------------------------------------------------------- */
	204
af294867 JD	205	static const struct i2c_device_id cs5345_id[] = {
	206	{ "cs5345", 0 },
	207	{ }
	208	};
	209	MODULE_DEVICE_TABLE(i2c, cs5345_id);
	210
51e86846 HV	211	static struct i2c_driver cs5345_driver = {
	212	.driver = {
	213	.owner = THIS_MODULE,
	214	.name = "cs5345",
	215	},
	216	.probe = cs5345_probe,
	217	.remove = cs5345_remove,
	218	.id_table = cs5345_id,
6fb377f8	219	};
51e86846 HV	220
	221	static __init int init_cs5345(void)
	222	{
	223	return i2c_add_driver(&cs5345_driver);
	224	}
	225
	226	static __exit void exit_cs5345(void)
	227	{
	228	i2c_del_driver(&cs5345_driver);
	229	}
	230
	231	module_init(init_cs5345);
	232	module_exit(exit_cs5345);