arch/arm/mach-msm/board-mahimahi-tpa2018d1.c - kernel/msm - Git at Google

 /* drivers/i2c/chips/tpa2018d1.c
  *
  * TI TPA2018D1 Speaker Amplifier
  *
  * Copyright (C) 2009 HTC Corporation
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
  * may be copied, distributed, and modified under those terms.
  *
  * 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.
  *
  */

 /* TODO: content validation in TPA2018_SET_CONFIG */

 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/fs.h>
 #include <linux/i2c.h>
 #include <linux/miscdevice.h>
 #include <linux/gpio.h>
 #include <asm/uaccess.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/tpa2018d1.h>

 #include "board-mahimahi-tpa2018d1.h"

 static struct i2c_client *this_client;
 static struct tpa2018d1_platform_data *pdata;
 static int is_on;
 static char spk_amp_cfg[8];
 static const char spk_amp_on[8] = { /* same length as spk_amp_cfg */
 	0x01, 0xc3, 0x20, 0x01, 0x00, 0x08, 0x1a, 0x21
 };
 static const char spk_amp_off[] = {0x01, 0xa2};

 static DEFINE_MUTEX(spk_amp_lock);
 static int tpa2018d1_opened;
 static char *config_data;
 static int tpa2018d1_num_modes;

 #define DEBUG 0

 static int tpa2018_i2c_write(const char *txData, int length)
 {
 	struct i2c_msg msg[] = {
 		{
 			.addr = this_client->addr,
 			.flags = 0,
 			.len = length,
 			.buf = txData,
 		},
 	};

 	if (i2c_transfer(this_client->adapter, msg, 1) < 0) {
 		pr_err("%s: I2C transfer error\n", __func__);
 		return -EIO;
 	} else
 		return 0;
 }

 static int tpa2018_i2c_read(char *rxData, int length)
 {
 	struct i2c_msg msgs[] = {
 		{
 			.addr = this_client->addr,
 			.flags = I2C_M_RD,
 			.len = length,
 			.buf = rxData,
 		},
 	};

 	if (i2c_transfer(this_client->adapter, msgs, 1) < 0) {
 		pr_err("%s: I2C transfer error\n", __func__);
 		return -EIO;
 	}

 #if DEBUG
 	do {
 		int i = 0;
 		for (i = 0; i < length; i++)
 			pr_info("%s: rx[%d] = %2x\n",
 				__func__, i, rxData[i]);
 	} while(0);
 #endif

 	return 0;
 }

 static int tpa2018d1_open(struct inode *inode, struct file *file)
 {
 	int rc = 0;

 	mutex_lock(&spk_amp_lock);

 	if (tpa2018d1_opened) {
 		pr_err("%s: busy\n", __func__);
 		rc = -EBUSY;
 		goto done;
 	}

 	tpa2018d1_opened = 1;
 done:
 	mutex_unlock(&spk_amp_lock);
 	return rc;
 }

 static int tpa2018d1_release(struct inode *inode, struct file *file)
 {
 	mutex_lock(&spk_amp_lock);
 	tpa2018d1_opened = 0;
 	mutex_unlock(&spk_amp_lock);

 	return 0;
 }

 static int tpa2018d1_read_config(void __user *argp)
 {
 	int rc = 0;
 	unsigned char reg_idx = 0x01;
 	unsigned char tmp[7];

 	if (!is_on) {
 		gpio_set_value(pdata->gpio_tpa2018_spk_en, 1);
 		msleep(5); /* According to TPA2018D1 Spec */
 	}

 	rc = tpa2018_i2c_write(&reg_idx, sizeof(reg_idx));
 	if (rc < 0)
 		goto err;

 	rc = tpa2018_i2c_read(tmp, sizeof(tmp));
 	if (rc < 0)
 		goto err;

 	if (copy_to_user(argp, &tmp, sizeof(tmp)))
 		rc = -EFAULT;

 err:
 	if (!is_on)
 		gpio_set_value(pdata->gpio_tpa2018_spk_en, 0);
 	return rc;
 }

 static int tpa2018d1_ioctl(struct inode *inode, struct file *file,
 		unsigned int cmd, unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
 	int rc = 0;
 	int mode = -1;
 	int offset = 0;
 	struct tpa2018d1_config_data cfg;

 	mutex_lock(&spk_amp_lock);

 	switch (cmd) {
 	case TPA2018_SET_CONFIG:
 		if (copy_from_user(spk_amp_cfg, argp, sizeof(spk_amp_cfg)))
 			rc = -EFAULT;
 		break;

 	case TPA2018_READ_CONFIG:
 		rc = tpa2018d1_read_config(argp);
 		break;

 	case TPA2018_SET_MODE:
 		if (copy_from_user(&mode, argp, sizeof(mode))) {
 			rc = -EFAULT;
 			break;
 		}
 		if (mode >= tpa2018d1_num_modes || mode < 0) {
 			pr_err("%s: unsupported tpa2018d1 mode %d\n",
 				__func__, mode);
 			rc = -EINVAL;
 			break;
 		}
 		if (!config_data) {
 			pr_err("%s: no config data!\n", __func__);
 			rc = -EIO;
 			break;
 		}
 		memcpy(spk_amp_cfg, config_data + mode * TPA2018D1_CMD_LEN,
 			TPA2018D1_CMD_LEN);
 		break;

 	case TPA2018_SET_PARAM:
 		if (copy_from_user(&cfg, argp, sizeof(cfg))) {
 			pr_err("%s: copy from user failed.\n", __func__);
 			rc = -EFAULT;
 			break;
 		}
 		tpa2018d1_num_modes = cfg.mode_num;
 		if (tpa2018d1_num_modes > TPA2018_NUM_MODES) {
 			pr_err("%s: invalid number of modes %d\n", __func__,
 				tpa2018d1_num_modes);
 			rc = -EINVAL;
 			break;
 		}
 		if (cfg.data_len != tpa2018d1_num_modes*TPA2018D1_CMD_LEN) {
 			pr_err("%s: invalid data length %d, expecting %d\n",
 				__func__, cfg.data_len,
 				tpa2018d1_num_modes * TPA2018D1_CMD_LEN);
 			rc = -EINVAL;
 			break;
 		}
 		/* Free the old data */
 		if (config_data)
 			kfree(config_data);
 		config_data = kmalloc(cfg.data_len, GFP_KERNEL);
 		if (!config_data) {
 			pr_err("%s: out of memory\n", __func__);
 			rc = -ENOMEM;
 			break;
 		}
 		if (copy_from_user(config_data, cfg.cmd_data, cfg.data_len)) {
 			pr_err("%s: copy data from user failed.\n", __func__);
 			kfree(config_data);
 			config_data = NULL;
 			rc = -EFAULT;
 			break;
 		}
 		/* replace default setting with playback setting */
 		if (tpa2018d1_num_modes >= TPA2018_MODE_PLAYBACK) {
 			offset = TPA2018_MODE_PLAYBACK * TPA2018D1_CMD_LEN;
 			memcpy(spk_amp_cfg, config_data + offset,
 					TPA2018D1_CMD_LEN);
 		}
 		break;

 	default:
 		pr_err("%s: invalid command %d\n", __func__, _IOC_NR(cmd));
 		rc = -EINVAL;
 		break;
 	}
 	mutex_unlock(&spk_amp_lock);
 	return rc;
 }

 static struct file_operations tpa2018d1_fops = {
 	.owner = THIS_MODULE,
 	.open = tpa2018d1_open,
 	.release = tpa2018d1_release,
 	.ioctl = tpa2018d1_ioctl,
 };

 static struct miscdevice tpa2018d1_device = {
 	.minor = MISC_DYNAMIC_MINOR,
 	.name = "tpa2018d1",
 	.fops = &tpa2018d1_fops,
 };

 void tpa2018d1_set_speaker_amp(int on)
 {
 	if (!pdata) {
 		pr_err("%s: no platform data!\n", __func__);
 		return;
 	}
 	mutex_lock(&spk_amp_lock);
 	if (on && !is_on) {
 		gpio_set_value(pdata->gpio_tpa2018_spk_en, 1);
 		msleep(5); /* According to TPA2018D1 Spec */

 		if (tpa2018_i2c_write(spk_amp_cfg, sizeof(spk_amp_cfg)) == 0) {
 			is_on = 1;
 			pr_info("%s: ON\n", __func__);
 		}
 	} else if (!on && is_on) {
 		if (tpa2018_i2c_write(spk_amp_off, sizeof(spk_amp_off)) == 0) {
 			is_on = 0;
 			msleep(2);
 			gpio_set_value(pdata->gpio_tpa2018_spk_en, 0);
 			pr_info("%s: OFF\n", __func__);
 		}
 	}
 	mutex_unlock(&spk_amp_lock);
 }

 static int tpa2018d1_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
 	int ret = 0;

 	pdata = client->dev.platform_data;

 	if (!pdata) {
 		ret = -EINVAL;
 		pr_err("%s: platform data is NULL\n", __func__);
 		goto err_no_pdata;
 	}

 	this_client = client;

 	ret = gpio_request(pdata->gpio_tpa2018_spk_en, "tpa2018");
 	if (ret < 0) {
 		pr_err("%s: gpio request aud_spk_en pin failed\n", __func__);
 		goto err_free_gpio;
 	}

 	ret = gpio_direction_output(pdata->gpio_tpa2018_spk_en, 1);
 	if (ret < 0) {
 		pr_err("%s: request aud_spk_en gpio direction failed\n",
 			__func__);
 		goto err_free_gpio;
 	}

 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 		pr_err("%s: i2c check functionality error\n", __func__);
 		ret = -ENODEV;
 		goto err_free_gpio;
 	}

 	gpio_set_value(pdata->gpio_tpa2018_spk_en, 0); /* Default Low */

 	ret = misc_register(&tpa2018d1_device);
 	if (ret) {
 		pr_err("%s: tpa2018d1_device register failed\n", __func__);
 		goto err_free_gpio;
 	}
 	memcpy(spk_amp_cfg, spk_amp_on, sizeof(spk_amp_on));
 	return 0;

 err_free_gpio:
 	gpio_free(pdata->gpio_tpa2018_spk_en);
 err_no_pdata:
 	return ret;
 }

 static int tpa2018d1_suspend(struct i2c_client *client, pm_message_t mesg)
 {
 	return 0;
 }

 static int tpa2018d1_resume(struct i2c_client *client)
 {
 	return 0;
 }

 static const struct i2c_device_id tpa2018d1_id[] = {
 	{ TPA2018D1_I2C_NAME, 0 },
 	{ }
 };

 static struct i2c_driver tpa2018d1_driver = {
 	.probe = tpa2018d1_probe,
 	.suspend = tpa2018d1_suspend,
 	.resume = tpa2018d1_resume,
 	.id_table = tpa2018d1_id,
 	.driver = {
 		.name = TPA2018D1_I2C_NAME,
 	},
 };

 static int __init tpa2018d1_init(void)
 {
 	pr_info("%s\n", __func__);
 	return i2c_add_driver(&tpa2018d1_driver);
 }

 module_init(tpa2018d1_init);

 MODULE_DESCRIPTION("tpa2018d1 speaker amp driver");
 MODULE_LICENSE("GPL");
	/* drivers/i2c/chips/tpa2018d1.c
	*
	* TI TPA2018D1 Speaker Amplifier
	*
	* Copyright (C) 2009 HTC Corporation
	*
	* This software is licensed under the terms of the GNU General Public
	* License version 2, as published by the Free Software Foundation, and
	* may be copied, distributed, and modified under those terms.
	*
	* 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.
	*
	*/

	/* TODO: content validation in TPA2018_SET_CONFIG */

	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/device.h>
	#include <linux/fs.h>
	#include <linux/i2c.h>
	#include <linux/miscdevice.h>
	#include <linux/gpio.h>
	#include <asm/uaccess.h>
	#include <linux/delay.h>
	#include <linux/mutex.h>
	#include <linux/slab.h>
	#include <linux/tpa2018d1.h>

	#include "board-mahimahi-tpa2018d1.h"

	static struct i2c_client *this_client;
	static struct tpa2018d1_platform_data *pdata;
	static int is_on;
	static char spk_amp_cfg[8];
	static const char spk_amp_on[8] = { /* same length as spk_amp_cfg */
	0x01, 0xc3, 0x20, 0x01, 0x00, 0x08, 0x1a, 0x21
	};
	static const char spk_amp_off[] = {0x01, 0xa2};

	static DEFINE_MUTEX(spk_amp_lock);
	static int tpa2018d1_opened;
	static char *config_data;
	static int tpa2018d1_num_modes;

	#define DEBUG 0

	static int tpa2018_i2c_write(const char *txData, int length)
	{
	struct i2c_msg msg[] = {
	{
	.addr = this_client->addr,
	.flags = 0,
	.len = length,
	.buf = txData,
	},
	};

	if (i2c_transfer(this_client->adapter, msg, 1) < 0) {
	pr_err("%s: I2C transfer error\n", __func__);
	return -EIO;
	} else
	return 0;
	}

	static int tpa2018_i2c_read(char *rxData, int length)
	{
	struct i2c_msg msgs[] = {
	{
	.addr = this_client->addr,
	.flags = I2C_M_RD,
	.len = length,
	.buf = rxData,
	},
	};

	if (i2c_transfer(this_client->adapter, msgs, 1) < 0) {
	pr_err("%s: I2C transfer error\n", __func__);
	return -EIO;
	}

	#if DEBUG
	do {
	int i = 0;
	for (i = 0; i < length; i++)
	pr_info("%s: rx[%d] = %2x\n",
	__func__, i, rxData[i]);
	} while(0);
	#endif

	return 0;
	}

	static int tpa2018d1_open(struct inode inode, struct file file)
	{
	int rc = 0;

	mutex_lock(&spk_amp_lock);

	if (tpa2018d1_opened) {
	pr_err("%s: busy\n", __func__);
	rc = -EBUSY;
	goto done;
	}

	tpa2018d1_opened = 1;
	done:
	mutex_unlock(&spk_amp_lock);
	return rc;
	}

	static int tpa2018d1_release(struct inode inode, struct file file)
	{
	mutex_lock(&spk_amp_lock);
	tpa2018d1_opened = 0;
	mutex_unlock(&spk_amp_lock);

	return 0;
	}

	static int tpa2018d1_read_config(void __user *argp)
	{
	int rc = 0;
	unsigned char reg_idx = 0x01;
	unsigned char tmp[7];

	if (!is_on) {
	gpio_set_value(pdata->gpio_tpa2018_spk_en, 1);
	msleep(5); /* According to TPA2018D1 Spec */
	}

	rc = tpa2018_i2c_write(&reg_idx, sizeof(reg_idx));
	if (rc < 0)
	goto err;

	rc = tpa2018_i2c_read(tmp, sizeof(tmp));
	if (rc < 0)
	goto err;

	if (copy_to_user(argp, &tmp, sizeof(tmp)))
	rc = -EFAULT;

	err:
	if (!is_on)
	gpio_set_value(pdata->gpio_tpa2018_spk_en, 0);
	return rc;
	}

	static int tpa2018d1_ioctl(struct inode inode, struct file file,
	unsigned int cmd, unsigned long arg)
	{
	void __user argp = (void __user )arg;
	int rc = 0;
	int mode = -1;
	int offset = 0;
	struct tpa2018d1_config_data cfg;

	mutex_lock(&spk_amp_lock);

	switch (cmd) {
	case TPA2018_SET_CONFIG:
	if (copy_from_user(spk_amp_cfg, argp, sizeof(spk_amp_cfg)))
	rc = -EFAULT;
	break;

	case TPA2018_READ_CONFIG:
	rc = tpa2018d1_read_config(argp);
	break;

	case TPA2018_SET_MODE:
	if (copy_from_user(&mode, argp, sizeof(mode))) {
	rc = -EFAULT;
	break;
	}
	if (mode >= tpa2018d1_num_modes \|\| mode < 0) {
	pr_err("%s: unsupported tpa2018d1 mode %d\n",
	__func__, mode);
	rc = -EINVAL;
	break;
	}
	if (!config_data) {
	pr_err("%s: no config data!\n", __func__);
	rc = -EIO;
	break;
	}
	memcpy(spk_amp_cfg, config_data + mode * TPA2018D1_CMD_LEN,
	TPA2018D1_CMD_LEN);
	break;

	case TPA2018_SET_PARAM:
	if (copy_from_user(&cfg, argp, sizeof(cfg))) {
	pr_err("%s: copy from user failed.\n", __func__);
	rc = -EFAULT;
	break;
	}
	tpa2018d1_num_modes = cfg.mode_num;
	if (tpa2018d1_num_modes > TPA2018_NUM_MODES) {
	pr_err("%s: invalid number of modes %d\n", __func__,
	tpa2018d1_num_modes);
	rc = -EINVAL;
	break;
	}
	if (cfg.data_len != tpa2018d1_num_modes*TPA2018D1_CMD_LEN) {
	pr_err("%s: invalid data length %d, expecting %d\n",
	__func__, cfg.data_len,
	tpa2018d1_num_modes * TPA2018D1_CMD_LEN);
	rc = -EINVAL;
	break;
	}
	/* Free the old data */
	if (config_data)
	kfree(config_data);
	config_data = kmalloc(cfg.data_len, GFP_KERNEL);
	if (!config_data) {
	pr_err("%s: out of memory\n", __func__);
	rc = -ENOMEM;
	break;
	}
	if (copy_from_user(config_data, cfg.cmd_data, cfg.data_len)) {
	pr_err("%s: copy data from user failed.\n", __func__);
	kfree(config_data);
	config_data = NULL;
	rc = -EFAULT;
	break;
	}
	/* replace default setting with playback setting */
	if (tpa2018d1_num_modes >= TPA2018_MODE_PLAYBACK) {
	offset = TPA2018_MODE_PLAYBACK * TPA2018D1_CMD_LEN;
	memcpy(spk_amp_cfg, config_data + offset,
	TPA2018D1_CMD_LEN);
	}
	break;

	default:
	pr_err("%s: invalid command %d\n", __func__, _IOC_NR(cmd));
	rc = -EINVAL;
	break;
	}
	mutex_unlock(&spk_amp_lock);
	return rc;
	}

	static struct file_operations tpa2018d1_fops = {
	.owner = THIS_MODULE,
	.open = tpa2018d1_open,
	.release = tpa2018d1_release,
	.ioctl = tpa2018d1_ioctl,
	};

	static struct miscdevice tpa2018d1_device = {
	.minor = MISC_DYNAMIC_MINOR,
	.name = "tpa2018d1",
	.fops = &tpa2018d1_fops,
	};

	void tpa2018d1_set_speaker_amp(int on)
	{
	if (!pdata) {
	pr_err("%s: no platform data!\n", __func__);
	return;
	}
	mutex_lock(&spk_amp_lock);
	if (on && !is_on) {
	gpio_set_value(pdata->gpio_tpa2018_spk_en, 1);
	msleep(5); /* According to TPA2018D1 Spec */

	if (tpa2018_i2c_write(spk_amp_cfg, sizeof(spk_amp_cfg)) == 0) {
	is_on = 1;
	pr_info("%s: ON\n", __func__);
	}
	} else if (!on && is_on) {
	if (tpa2018_i2c_write(spk_amp_off, sizeof(spk_amp_off)) == 0) {
	is_on = 0;
	msleep(2);
	gpio_set_value(pdata->gpio_tpa2018_spk_en, 0);
	pr_info("%s: OFF\n", __func__);
	}
	}
	mutex_unlock(&spk_amp_lock);
	}

	static int tpa2018d1_probe(struct i2c_client client, const struct i2c_device_id id)
	{
	int ret = 0;

	pdata = client->dev.platform_data;

	if (!pdata) {
	ret = -EINVAL;
	pr_err("%s: platform data is NULL\n", __func__);
	goto err_no_pdata;
	}

	this_client = client;

	ret = gpio_request(pdata->gpio_tpa2018_spk_en, "tpa2018");
	if (ret < 0) {
	pr_err("%s: gpio request aud_spk_en pin failed\n", __func__);
	goto err_free_gpio;
	}

	ret = gpio_direction_output(pdata->gpio_tpa2018_spk_en, 1);
	if (ret < 0) {
	pr_err("%s: request aud_spk_en gpio direction failed\n",
	__func__);
	goto err_free_gpio;
	}

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	pr_err("%s: i2c check functionality error\n", __func__);
	ret = -ENODEV;
	goto err_free_gpio;
	}

	gpio_set_value(pdata->gpio_tpa2018_spk_en, 0); /* Default Low */

	ret = misc_register(&tpa2018d1_device);
	if (ret) {
	pr_err("%s: tpa2018d1_device register failed\n", __func__);
	goto err_free_gpio;
	}
	memcpy(spk_amp_cfg, spk_amp_on, sizeof(spk_amp_on));
	return 0;

	err_free_gpio:
	gpio_free(pdata->gpio_tpa2018_spk_en);
	err_no_pdata:
	return ret;
	}

	static int tpa2018d1_suspend(struct i2c_client *client, pm_message_t mesg)
	{
	return 0;
	}

	static int tpa2018d1_resume(struct i2c_client *client)
	{
	return 0;
	}

	static const struct i2c_device_id tpa2018d1_id[] = {
	{ TPA2018D1_I2C_NAME, 0 },
	{ }
	};

	static struct i2c_driver tpa2018d1_driver = {
	.probe = tpa2018d1_probe,
	.suspend = tpa2018d1_suspend,
	.resume = tpa2018d1_resume,
	.id_table = tpa2018d1_id,
	.driver = {
	.name = TPA2018D1_I2C_NAME,
	},
	};

	static int __init tpa2018d1_init(void)
	{
	pr_info("%s\n", __func__);
	return i2c_add_driver(&tpa2018d1_driver);
	}

	module_init(tpa2018d1_init);

	MODULE_DESCRIPTION("tpa2018d1 speaker amp driver");
	MODULE_LICENSE("GPL");