[deliverable/linux.git] / drivers / media / video / tlv320aic23b.c

/*
 * tlv320aic23b - driver version 0.0.1
 *
 * Copyright (C) 2006 Scott Alfter <salfter@ssai.us>
 *
 * Based on wm8775 driver
 *
 * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
 * Copyright (C) 2005 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., 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-ctrls.h>

MODULE_DESCRIPTION("tlv320aic23b driver");
MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");
MODULE_LICENSE("GPL");


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

struct tlv320aic23b_state {
	struct v4l2_subdev sd;
	struct v4l2_ctrl_handler hdl;
};

static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct tlv320aic23b_state, sd);
}

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
	return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd;
}

static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	int i;

	if ((reg < 0 || reg > 9) && (reg != 15)) {
		v4l2_err(sd, "Invalid register R%d\n", reg);
		return -1;
	}

	for (i = 0; i < 3; i++)
		if (i2c_smbus_write_byte_data(client,
				(reg << 1) | (val >> 8), val & 0xff) == 0)
			return 0;
	v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
	return -1;
}

static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
{
	switch (freq) {
	case 32000: /* set sample rate to 32 kHz */
		tlv320aic23b_write(sd, 8, 0x018);
		break;
	case 44100: /* set sample rate to 44.1 kHz */
		tlv320aic23b_write(sd, 8, 0x022);
		break;
	case 48000: /* set sample rate to 48 kHz */
		tlv320aic23b_write(sd, 8, 0x000);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct v4l2_subdev *sd = to_sd(ctrl);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */
		/* set gain on both channels to +3.0 dB */
		if (!ctrl->val)
			tlv320aic23b_write(sd, 0, 0x119);
		return 0;
	}
	return -EINVAL;
}

static int tlv320aic23b_log_status(struct v4l2_subdev *sd)
{
	struct tlv320aic23b_state *state = to_state(sd);

	v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
	return 0;
}

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

static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = {
	.s_ctrl = tlv320aic23b_s_ctrl,
};

static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = {
	.log_status = tlv320aic23b_log_status,
	.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
	.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
	.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
	.g_ctrl = v4l2_subdev_g_ctrl,
	.s_ctrl = v4l2_subdev_s_ctrl,
	.queryctrl = v4l2_subdev_queryctrl,
	.querymenu = v4l2_subdev_querymenu,
};

static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = {
	.s_clock_freq = tlv320aic23b_s_clock_freq,
};

static const struct v4l2_subdev_ops tlv320aic23b_ops = {
	.core = &tlv320aic23b_core_ops,
	.audio = &tlv320aic23b_audio_ops,
};

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

/* i2c implementation */

/*
 * Generic i2c probe
 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 */

static int tlv320aic23b_probe(struct i2c_client *client,
			      const struct i2c_device_id *id)
{
	struct tlv320aic23b_state *state;
	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);

	state = kzalloc(sizeof(struct tlv320aic23b_state), GFP_KERNEL);
	if (state == NULL)
		return -ENOMEM;
	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops);

	/* Initialize tlv320aic23b */

	/* RESET */
	tlv320aic23b_write(sd, 15, 0x000);
	/* turn off DAC & mic input */
	tlv320aic23b_write(sd, 6, 0x00A);
	/* left-justified, 24-bit, master mode */
	tlv320aic23b_write(sd, 7, 0x049);
	/* set gain on both channels to +3.0 dB */
	tlv320aic23b_write(sd, 0, 0x119);
	/* set sample rate to 48 kHz */
	tlv320aic23b_write(sd, 8, 0x000);
	/* activate digital interface */
	tlv320aic23b_write(sd, 9, 0x001);

	v4l2_ctrl_handler_init(&state->hdl, 1);
	v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops,
			V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
	sd->ctrl_handler = &state->hdl;
	if (state->hdl.error) {
		int err = state->hdl.error;

		v4l2_ctrl_handler_free(&state->hdl);
		kfree(state);
		return err;
	}
	v4l2_ctrl_handler_setup(&state->hdl);
	return 0;
}

static int tlv320aic23b_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct tlv320aic23b_state *state = to_state(sd);

	v4l2_device_unregister_subdev(sd);
	v4l2_ctrl_handler_free(&state->hdl);
	kfree(state);
	return 0;
}

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

static const struct i2c_device_id tlv320aic23b_id[] = {
	{ "tlv320aic23b", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id);

static struct i2c_driver tlv320aic23b_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "tlv320aic23b",
	},
	.probe		= tlv320aic23b_probe,
	.remove		= tlv320aic23b_remove,
	.id_table	= tlv320aic23b_id,
};

static __init int init_tlv320aic23b(void)
{
	return i2c_add_driver(&tlv320aic23b_driver);
}

static __exit void exit_tlv320aic23b(void)
{
	i2c_del_driver(&tlv320aic23b_driver);
}

module_init(init_tlv320aic23b);
module_exit(exit_tlv320aic23b);
Commit	Line	Data
88ca8ed0 SA	1	/*
	2	* tlv320aic23b - driver version 0.0.1
	3	*
	4	* Copyright (C) 2006 Scott Alfter <salfter@ssai.us>
	5	*
	6	* Based on wm8775 driver
	7	*
	8	* Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
	9	* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	24	*/
	25
	26	#include <linux/module.h>
	27	#include <linux/types.h>
5a0e3ad6	28	#include <linux/slab.h>
88ca8ed0 SA	29	#include <linux/ioctl.h>
	30	#include <asm/uaccess.h>
	31	#include <linux/i2c.h>
33b687cf	32	#include <linux/videodev2.h>
6869ffe8	33	#include <media/v4l2-device.h>
e3d5ef04	34	#include <media/v4l2-ctrls.h>
88ca8ed0 SA	35
	36	MODULE_DESCRIPTION("tlv320aic23b driver");
	37	MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");
	38	MODULE_LICENSE("GPL");
	39
88ca8ed0 SA	40
	41	/* ----------------------------------------------------------------------- */
	42
	43	struct tlv320aic23b_state {
6869ffe8	44	struct v4l2_subdev sd;
e3d5ef04	45	struct v4l2_ctrl_handler hdl;
88ca8ed0 SA	46	};
88ca8ed0 SA	47
6869ffe8	48	static inline struct tlv320aic23b_state to_state(struct v4l2_subdev sd)
88ca8ed0	49	{
6869ffe8 HV	50	return container_of(sd, struct tlv320aic23b_state, sd);
	51	}
	52
e3d5ef04 HV	53	static inline struct v4l2_subdev to_sd(struct v4l2_ctrl ctrl)
	54	{
	55	return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd;
	56	}
	57
6869ffe8 HV	58	static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val)
	59	{
	60	struct i2c_client *client = v4l2_get_subdevdata(sd);
88ca8ed0 SA	61	int i;
	62
	63	if ((reg < 0 \|\| reg > 9) && (reg != 15)) {
6869ffe8	64	v4l2_err(sd, "Invalid register R%d\n", reg);
88ca8ed0 SA	65	return -1;
	66	}
	67
574dec61 HV	68	for (i = 0; i < 3; i++)
	69	if (i2c_smbus_write_byte_data(client,
	70	(reg << 1) \| (val >> 8), val & 0xff) == 0)
88ca8ed0	71	return 0;
6869ffe8	72	v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
88ca8ed0 SA	73	return -1;
	74	}
	75
6869ffe8	76	static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
88ca8ed0	77	{
6869ffe8 HV	78	switch (freq) {
	79	case 32000: /* set sample rate to 32 kHz */
	80	tlv320aic23b_write(sd, 8, 0x018);
88ca8ed0	81	break;
6869ffe8 HV	82	case 44100: /* set sample rate to 44.1 kHz */
6869ffe8 HV	83	tlv320aic23b_write(sd, 8, 0x022);
88ca8ed0	84	break;
6869ffe8 HV	85	case 48000: /* set sample rate to 48 kHz */
6869ffe8 HV	86	tlv320aic23b_write(sd, 8, 0x000);
88ca8ed0	87	break;
88ca8ed0 SA	88	default:
	89	return -EINVAL;
	90	}
	91	return 0;
	92	}
	93
e3d5ef04	94	static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl)
6869ffe8	95	{
e3d5ef04 HV	96	struct v4l2_subdev *sd = to_sd(ctrl);
	97
	98	switch (ctrl->id) {
	99	case V4L2_CID_AUDIO_MUTE:
	100	tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */
	101	/* set gain on both channels to +3.0 dB */
	102	if (!ctrl->val)
	103	tlv320aic23b_write(sd, 0, 0x119);
	104	return 0;
	105	}
	106	return -EINVAL;
6869ffe8 HV	107	}
	108
	109	static int tlv320aic23b_log_status(struct v4l2_subdev *sd)
	110	{
	111	struct tlv320aic23b_state *state = to_state(sd);
	112
e3d5ef04	113	v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
6869ffe8 HV	114	return 0;
	115	}
	116
6869ffe8 HV	117	/* ----------------------------------------------------------------------- */
6869ffe8 HV	118
e3d5ef04 HV	119	static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = {
	120	.s_ctrl = tlv320aic23b_s_ctrl,
	121	};
	122
6869ffe8 HV	123	static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = {
6869ffe8 HV	124	.log_status = tlv320aic23b_log_status,
e3d5ef04 HV	125	.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
	126	.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
	127	.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
	128	.g_ctrl = v4l2_subdev_g_ctrl,
	129	.s_ctrl = v4l2_subdev_s_ctrl,
	130	.queryctrl = v4l2_subdev_queryctrl,
	131	.querymenu = v4l2_subdev_querymenu,
6869ffe8 HV	132	};
	133
	134	static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = {
	135	.s_clock_freq = tlv320aic23b_s_clock_freq,
	136	};
	137
	138	static const struct v4l2_subdev_ops tlv320aic23b_ops = {
	139	.core = &tlv320aic23b_core_ops,
	140	.audio = &tlv320aic23b_audio_ops,
	141	};
	142
88ca8ed0 SA	143	/* ----------------------------------------------------------------------- */
	144
	145	/* i2c implementation */
	146
	147	/*
	148	* Generic i2c probe
	149	* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
	150	*/
	151
d2653e92 JD	152	static int tlv320aic23b_probe(struct i2c_client *client,
d2653e92 JD	153	const struct i2c_device_id *id)
88ca8ed0	154	{
88ca8ed0	155	struct tlv320aic23b_state *state;
6869ffe8	156	struct v4l2_subdev *sd;
88ca8ed0 SA	157
88ca8ed0 SA	158	/* Check if the adapter supports the needed features */
6235168d	159	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
188f3457	160	return -EIO;
88ca8ed0	161
574dec61 HV	162	v4l_info(client, "chip found @ 0x%x (%s)\n",
574dec61 HV	163	client->addr << 1, client->adapter->name);
88ca8ed0	164
6869ffe8	165	state = kzalloc(sizeof(struct tlv320aic23b_state), GFP_KERNEL);
574dec61	166	if (state == NULL)
88ca8ed0	167	return -ENOMEM;
6869ffe8 HV	168	sd = &state->sd;
6869ffe8 HV	169	v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops);
88ca8ed0	170
574dec61 HV	171	/* Initialize tlv320aic23b */
	172
	173	/* RESET */
6869ffe8	174	tlv320aic23b_write(sd, 15, 0x000);
574dec61	175	/* turn off DAC & mic input */
6869ffe8	176	tlv320aic23b_write(sd, 6, 0x00A);
574dec61	177	/* left-justified, 24-bit, master mode */
6869ffe8	178	tlv320aic23b_write(sd, 7, 0x049);
574dec61	179	/* set gain on both channels to +3.0 dB */
6869ffe8	180	tlv320aic23b_write(sd, 0, 0x119);
574dec61	181	/* set sample rate to 48 kHz */
6869ffe8	182	tlv320aic23b_write(sd, 8, 0x000);
574dec61	183	/* activate digital interface */
6869ffe8	184	tlv320aic23b_write(sd, 9, 0x001);
e3d5ef04 HV	185
	186	v4l2_ctrl_handler_init(&state->hdl, 1);
	187	v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops,
	188	V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
	189	sd->ctrl_handler = &state->hdl;
	190	if (state->hdl.error) {
	191	int err = state->hdl.error;
	192
	193	v4l2_ctrl_handler_free(&state->hdl);
	194	kfree(state);
	195	return err;
	196	}
	197	v4l2_ctrl_handler_setup(&state->hdl);
88ca8ed0 SA	198	return 0;
	199	}
	200
6235168d	201	static int tlv320aic23b_remove(struct i2c_client *client)
88ca8ed0	202	{
6869ffe8	203	struct v4l2_subdev *sd = i2c_get_clientdata(client);
e3d5ef04	204	struct tlv320aic23b_state *state = to_state(sd);
6869ffe8 HV	205
6869ffe8 HV	206	v4l2_device_unregister_subdev(sd);
e3d5ef04 HV	207	v4l2_ctrl_handler_free(&state->hdl);
e3d5ef04 HV	208	kfree(state);
88ca8ed0 SA	209	return 0;
	210	}
	211
	212	/* ----------------------------------------------------------------------- */
	213
ae429083 JD	214	static const struct i2c_device_id tlv320aic23b_id[] = {
	215	{ "tlv320aic23b", 0 },
	216	{ }
	217	};
	218	MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id);
88ca8ed0	219
8e71ff0a HV	220	static struct i2c_driver tlv320aic23b_driver = {
	221	.driver = {
	222	.owner = THIS_MODULE,
	223	.name = "tlv320aic23b",
	224	},
	225	.probe = tlv320aic23b_probe,
	226	.remove = tlv320aic23b_remove,
	227	.id_table = tlv320aic23b_id,
6235168d	228	};
8e71ff0a HV	229
	230	static __init int init_tlv320aic23b(void)
	231	{
	232	return i2c_add_driver(&tlv320aic23b_driver);
	233	}
	234
	235	static __exit void exit_tlv320aic23b(void)
	236	{
	237	i2c_del_driver(&tlv320aic23b_driver);
	238	}
	239
	240	module_init(init_tlv320aic23b);
	241	module_exit(exit_tlv320aic23b);