[deliverable/linux.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 <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_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 v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "cs5345",
	.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
6fb377f8 HV	21	#include <linux/module.h>
	22	#include <linux/kernel.h>
	23	#include <linux/i2c.h>
	24	#include <linux/videodev2.h>
b3ee7e21	25	#include <media/v4l2-device.h>
6fb377f8	26	#include <media/v4l2-chip-ident.h>
b3ee7e21	27	#include <media/v4l2-i2c-drv.h>
6fb377f8 HV	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
b3ee7e21	56	static int cs5345_s_routing(struct v4l2_subdev sd, const struct v4l2_routing route)
6fb377f8	57	{
b3ee7e21 HV	58	if ((route->input & 0xf) > 6) {
	59	v4l2_err(sd, "Invalid input %d.\n", route->input);
	60	return -EINVAL;
6fb377f8	61	}
b3ee7e21 HV	62	cs5345_write(sd, 0x09, route->input & 0xf);
	63	cs5345_write(sd, 0x05, route->input & 0xf0);
	64	return 0;
	65	}
6fb377f8	66
b3ee7e21 HV	67	static int cs5345_g_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	68	{
	69	if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
	70	ctrl->value = (cs5345_read(sd, 0x04) & 0x08) != 0;
	71	return 0;
	72	}
	73	if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
6fb377f8	74	return -EINVAL;
b3ee7e21 HV	75	ctrl->value = cs5345_read(sd, 0x07) & 0x3f;
	76	if (ctrl->value >= 32)
	77	ctrl->value = ctrl->value - 64;
	78	return 0;
	79	}
	80
	81	static int cs5345_s_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	82	{
	83	if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
	84	cs5345_write(sd, 0x04, ctrl->value ? 0x80 : 0);
	85	return 0;
6fb377f8	86	}
b3ee7e21 HV	87	if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
	88	return -EINVAL;
	89	if (ctrl->value > 24 \|\| ctrl->value < -24)
	90	return -EINVAL;
	91	cs5345_write(sd, 0x07, ((u8)ctrl->value) & 0x3f);
	92	cs5345_write(sd, 0x08, ((u8)ctrl->value) & 0x3f);
	93	return 0;
	94	}
	95
	96	#ifdef CONFIG_VIDEO_ADV_DEBUG
aecde8b5	97	static int cs5345_g_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
b3ee7e21 HV	98	{
	99	struct i2c_client *client = v4l2_get_subdevdata(sd);
	100
aecde8b5	101	if (!v4l2_chip_match_i2c_client(client, &reg->match))
b3ee7e21 HV	102	return -EINVAL;
	103	if (!capable(CAP_SYS_ADMIN))
	104	return -EPERM;
aecde8b5	105	reg->size = 1;
b3ee7e21 HV	106	reg->val = cs5345_read(sd, reg->reg & 0x1f);
	107	return 0;
	108	}
	109
aecde8b5	110	static int cs5345_s_register(struct v4l2_subdev sd, struct v4l2_dbg_register reg)
b3ee7e21 HV	111	{
	112	struct i2c_client *client = v4l2_get_subdevdata(sd);
	113
aecde8b5	114	if (!v4l2_chip_match_i2c_client(client, &reg->match))
b3ee7e21 HV	115	return -EINVAL;
	116	if (!capable(CAP_SYS_ADMIN))
	117	return -EPERM;
	118	cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
6fb377f8 HV	119	return 0;
6fb377f8 HV	120	}
b3ee7e21 HV	121	#endif
b3ee7e21 HV	122
aecde8b5	123	static int cs5345_g_chip_ident(struct v4l2_subdev sd, struct v4l2_dbg_chip_ident chip)
b3ee7e21 HV	124	{
	125	struct i2c_client *client = v4l2_get_subdevdata(sd);
	126
	127	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
	128	}
	129
	130	static int cs5345_log_status(struct v4l2_subdev *sd)
	131	{
	132	u8 v = cs5345_read(sd, 0x09) & 7;
	133	u8 m = cs5345_read(sd, 0x04);
	134	int vol = cs5345_read(sd, 0x08) & 0x3f;
	135
	136	v4l2_info(sd, "Input: %d%s\n", v,
	137	(m & 0x80) ? " (muted)" : "");
	138	if (vol >= 32)
	139	vol = vol - 64;
	140	v4l2_info(sd, "Volume: %d dB\n", vol);
	141	return 0;
	142	}
	143
b3ee7e21 HV	144	/* ----------------------------------------------------------------------- */
	145
	146	static const struct v4l2_subdev_core_ops cs5345_core_ops = {
	147	.log_status = cs5345_log_status,
	148	.g_chip_ident = cs5345_g_chip_ident,
	149	.g_ctrl = cs5345_g_ctrl,
	150	.s_ctrl = cs5345_s_ctrl,
	151	#ifdef CONFIG_VIDEO_ADV_DEBUG
	152	.g_register = cs5345_g_register,
	153	.s_register = cs5345_s_register,
	154	#endif
	155	};
	156
	157	static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
	158	.s_routing = cs5345_s_routing,
	159	};
	160
	161	static const struct v4l2_subdev_ops cs5345_ops = {
	162	.core = &cs5345_core_ops,
	163	.audio = &cs5345_audio_ops,
	164	};
6fb377f8 HV	165
	166	/* ----------------------------------------------------------------------- */
	167
d2653e92 JD	168	static int cs5345_probe(struct i2c_client *client,
d2653e92 JD	169	const struct i2c_device_id *id)
6fb377f8	170	{
b3ee7e21 HV	171	struct v4l2_subdev *sd;
b3ee7e21 HV	172
6fb377f8 HV	173	/* Check if the adapter supports the needed features */
	174	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	175	return -EIO;
	176
	177	v4l_info(client, "chip found @ 0x%x (%s)\n",
	178	client->addr << 1, client->adapter->name);
	179
b3ee7e21 HV	180	sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
	181	if (sd == NULL)
	182	return -ENOMEM;
	183	v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
	184
	185	cs5345_write(sd, 0x02, 0x00);
	186	cs5345_write(sd, 0x04, 0x01);
	187	cs5345_write(sd, 0x09, 0x01);
	188	return 0;
	189	}
	190
	191	/* ----------------------------------------------------------------------- */
	192
	193	static int cs5345_remove(struct i2c_client *client)
	194	{
	195	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	196
	197	v4l2_device_unregister_subdev(sd);
	198	kfree(sd);
6fb377f8 HV	199	return 0;
	200	}
	201
	202	/* ----------------------------------------------------------------------- */
	203
af294867 JD	204	static const struct i2c_device_id cs5345_id[] = {
	205	{ "cs5345", 0 },
	206	{ }
	207	};
	208	MODULE_DEVICE_TABLE(i2c, cs5345_id);
	209
6fb377f8 HV	210	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
6fb377f8 HV	211	.name = "cs5345",
6fb377f8	212	.probe = cs5345_probe,
b3ee7e21	213	.remove = cs5345_remove,
af294867	214	.id_table = cs5345_id,
6fb377f8	215	};