drivers/media/video/tlv320aic23b.c - maze/linux - Git at Google

 /*
  * 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);
	/*
	* 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);