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