mirror of https://gitee.com/openkylin/linux.git
277 lines
6.6 KiB
C
277 lines
6.6 KiB
C
/*
|
|
* MFD driver for twl4030 codec submodule
|
|
*
|
|
* Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
|
|
*
|
|
* Copyright: (C) 2009 Nokia Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/i2c/twl.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/twl4030-codec.h>
|
|
|
|
#define TWL4030_CODEC_CELLS 2
|
|
|
|
static struct platform_device *twl4030_codec_dev;
|
|
|
|
struct twl4030_codec_resource {
|
|
int request_count;
|
|
u8 reg;
|
|
u8 mask;
|
|
};
|
|
|
|
struct twl4030_codec {
|
|
unsigned int audio_mclk;
|
|
struct mutex mutex;
|
|
struct twl4030_codec_resource resource[TWL4030_CODEC_RES_MAX];
|
|
struct mfd_cell cells[TWL4030_CODEC_CELLS];
|
|
};
|
|
|
|
/*
|
|
* Modify the resource, the function returns the content of the register
|
|
* after the modification.
|
|
*/
|
|
static int twl4030_codec_set_resource(enum twl4030_codec_res id, int enable)
|
|
{
|
|
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
|
|
u8 val;
|
|
|
|
twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
|
|
codec->resource[id].reg);
|
|
|
|
if (enable)
|
|
val |= codec->resource[id].mask;
|
|
else
|
|
val &= ~codec->resource[id].mask;
|
|
|
|
twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
|
|
val, codec->resource[id].reg);
|
|
|
|
return val;
|
|
}
|
|
|
|
static inline int twl4030_codec_get_resource(enum twl4030_codec_res id)
|
|
{
|
|
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
|
|
u8 val;
|
|
|
|
twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
|
|
codec->resource[id].reg);
|
|
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Enable the resource.
|
|
* The function returns with error or the content of the register
|
|
*/
|
|
int twl4030_codec_enable_resource(enum twl4030_codec_res id)
|
|
{
|
|
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
|
|
int val;
|
|
|
|
if (id >= TWL4030_CODEC_RES_MAX) {
|
|
dev_err(&twl4030_codec_dev->dev,
|
|
"Invalid resource ID (%u)\n", id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&codec->mutex);
|
|
if (!codec->resource[id].request_count)
|
|
/* Resource was disabled, enable it */
|
|
val = twl4030_codec_set_resource(id, 1);
|
|
else
|
|
val = twl4030_codec_get_resource(id);
|
|
|
|
codec->resource[id].request_count++;
|
|
mutex_unlock(&codec->mutex);
|
|
|
|
return val;
|
|
}
|
|
EXPORT_SYMBOL_GPL(twl4030_codec_enable_resource);
|
|
|
|
/*
|
|
* Disable the resource.
|
|
* The function returns with error or the content of the register
|
|
*/
|
|
int twl4030_codec_disable_resource(unsigned id)
|
|
{
|
|
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
|
|
int val;
|
|
|
|
if (id >= TWL4030_CODEC_RES_MAX) {
|
|
dev_err(&twl4030_codec_dev->dev,
|
|
"Invalid resource ID (%u)\n", id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&codec->mutex);
|
|
if (!codec->resource[id].request_count) {
|
|
dev_err(&twl4030_codec_dev->dev,
|
|
"Resource has been disabled already (%u)\n", id);
|
|
mutex_unlock(&codec->mutex);
|
|
return -EPERM;
|
|
}
|
|
codec->resource[id].request_count--;
|
|
|
|
if (!codec->resource[id].request_count)
|
|
/* Resource can be disabled now */
|
|
val = twl4030_codec_set_resource(id, 0);
|
|
else
|
|
val = twl4030_codec_get_resource(id);
|
|
|
|
mutex_unlock(&codec->mutex);
|
|
|
|
return val;
|
|
}
|
|
EXPORT_SYMBOL_GPL(twl4030_codec_disable_resource);
|
|
|
|
unsigned int twl4030_codec_get_mclk(void)
|
|
{
|
|
struct twl4030_codec *codec = platform_get_drvdata(twl4030_codec_dev);
|
|
|
|
return codec->audio_mclk;
|
|
}
|
|
EXPORT_SYMBOL_GPL(twl4030_codec_get_mclk);
|
|
|
|
static int __devinit twl4030_codec_probe(struct platform_device *pdev)
|
|
{
|
|
struct twl4030_codec *codec;
|
|
struct twl4030_codec_data *pdata = pdev->dev.platform_data;
|
|
struct mfd_cell *cell = NULL;
|
|
int ret, childs = 0;
|
|
u8 val;
|
|
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "Platform data is missing\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Configure APLL_INFREQ and disable APLL if enabled */
|
|
val = 0;
|
|
switch (pdata->audio_mclk) {
|
|
case 19200000:
|
|
val |= TWL4030_APLL_INFREQ_19200KHZ;
|
|
break;
|
|
case 26000000:
|
|
val |= TWL4030_APLL_INFREQ_26000KHZ;
|
|
break;
|
|
case 38400000:
|
|
val |= TWL4030_APLL_INFREQ_38400KHZ;
|
|
break;
|
|
default:
|
|
dev_err(&pdev->dev, "Invalid audio_mclk\n");
|
|
return -EINVAL;
|
|
}
|
|
twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
|
|
val, TWL4030_REG_APLL_CTL);
|
|
|
|
codec = kzalloc(sizeof(struct twl4030_codec), GFP_KERNEL);
|
|
if (!codec)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, codec);
|
|
|
|
twl4030_codec_dev = pdev;
|
|
mutex_init(&codec->mutex);
|
|
codec->audio_mclk = pdata->audio_mclk;
|
|
|
|
/* Codec power */
|
|
codec->resource[TWL4030_CODEC_RES_POWER].reg = TWL4030_REG_CODEC_MODE;
|
|
codec->resource[TWL4030_CODEC_RES_POWER].mask = TWL4030_CODECPDZ;
|
|
|
|
/* PLL */
|
|
codec->resource[TWL4030_CODEC_RES_APLL].reg = TWL4030_REG_APLL_CTL;
|
|
codec->resource[TWL4030_CODEC_RES_APLL].mask = TWL4030_APLL_EN;
|
|
|
|
if (pdata->audio) {
|
|
cell = &codec->cells[childs];
|
|
cell->name = "twl4030_codec_audio";
|
|
cell->platform_data = pdata->audio;
|
|
cell->data_size = sizeof(*pdata->audio);
|
|
childs++;
|
|
}
|
|
if (pdata->vibra) {
|
|
cell = &codec->cells[childs];
|
|
cell->name = "twl4030_codec_vibra";
|
|
cell->platform_data = pdata->vibra;
|
|
cell->data_size = sizeof(*pdata->vibra);
|
|
childs++;
|
|
}
|
|
|
|
if (childs)
|
|
ret = mfd_add_devices(&pdev->dev, pdev->id, codec->cells,
|
|
childs, NULL, 0);
|
|
else {
|
|
dev_err(&pdev->dev, "No platform data found for childs\n");
|
|
ret = -ENODEV;
|
|
}
|
|
|
|
if (!ret)
|
|
return 0;
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(codec);
|
|
twl4030_codec_dev = NULL;
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit twl4030_codec_remove(struct platform_device *pdev)
|
|
{
|
|
struct twl4030_codec *codec = platform_get_drvdata(pdev);
|
|
|
|
mfd_remove_devices(&pdev->dev);
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(codec);
|
|
twl4030_codec_dev = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
MODULE_ALIAS("platform:twl4030_codec");
|
|
|
|
static struct platform_driver twl4030_codec_driver = {
|
|
.probe = twl4030_codec_probe,
|
|
.remove = __devexit_p(twl4030_codec_remove),
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "twl4030_codec",
|
|
},
|
|
};
|
|
|
|
static int __devinit twl4030_codec_init(void)
|
|
{
|
|
return platform_driver_register(&twl4030_codec_driver);
|
|
}
|
|
module_init(twl4030_codec_init);
|
|
|
|
static void __devexit twl4030_codec_exit(void)
|
|
{
|
|
platform_driver_unregister(&twl4030_codec_driver);
|
|
}
|
|
module_exit(twl4030_codec_exit);
|
|
|
|
MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
|
|
MODULE_LICENSE("GPL");
|
|
|