M7350/kernel/arch/arm/mach-msm/board-mahimahi-tpa2018d1.c
2024-09-09 08:52:07 +00:00

369 lines
8.0 KiB
C

/* 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");