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/*
* Driver for the 1250-EV1 audio I/O module
*
* Copyright 2011 Wolfson Microelectronics plc
*
* 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.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_INPUT("WM1250 Input"),
SND_SOC_DAPM_OUTPUT("WM1250 Output"),
};
static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
{ "ADC", NULL, "WM1250 Input" },
{ "WM1250 Output", NULL, "DAC" },
};
static struct snd_soc_dai_driver wm1250_ev1_dai = {
.name = "wm1250-ev1",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 1,
.rates = SNDRV_PCM_RATE_8000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 1,
.rates = SNDRV_PCM_RATE_8000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
};
static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {
.dapm_widgets = wm1250_ev1_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
.dapm_routes = wm1250_ev1_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
};
static int __devinit wm1250_ev1_probe(struct i2c_client *i2c,
const struct i2c_device_id *i2c_id)
{
int id, board, rev;
board = i2c_smbus_read_byte_data(i2c, 0);
if (board < 0) {
dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
return board;
}
id = (board & 0xfe) >> 2;
rev = board & 0x3;
if (id != 1) {
dev_err(&i2c->dev, "Unknown board ID %d\n", id);
return -ENODEV;
}
dev_info(&i2c->dev, "revision %d\n", rev + 1);
return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
&wm1250_ev1_dai, 1);
}
static int __devexit wm1250_ev1_remove(struct i2c_client *i2c)
{
snd_soc_unregister_codec(&i2c->dev);
return 0;
}
static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
{ "wm1250-ev1", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
static struct i2c_driver wm1250_ev1_i2c_driver = {
.driver = {
.name = "wm1250-ev1",
.owner = THIS_MODULE,
},
.probe = wm1250_ev1_probe,
.remove = __devexit_p(wm1250_ev1_remove),
.id_table = wm1250_ev1_i2c_id,
};
static int __init wm1250_ev1_modinit(void)
{
int ret = 0;
ret = i2c_add_driver(&wm1250_ev1_i2c_driver);
if (ret != 0)
pr_err("Failed to register WM1250-EV1 I2C driver: %d\n", ret);
return ret;
}
module_init(wm1250_ev1_modinit);
static void __exit wm1250_ev1_exit(void)
{
i2c_del_driver(&wm1250_ev1_i2c_driver);
}
module_exit(wm1250_ev1_exit);
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
MODULE_LICENSE("GPL");
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