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/*
* sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards
* that are using WM8731 as codec.
*
* Copyright (C) 2011 Atmel,
* Nicolas Ferre <nicolas.ferre@atmel.com>
*
* Copyright (C) 2013 Paratronic,
* Richard Genoud <richard.genoud@gmail.com>
*
* Based on sam9g20_wm8731.c by:
* Sedji Gaouaou <sedji.gaouaou@atmel.com>
*
* 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/of.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>
#include "../codecs/wm8731.h"
#include "atmel_ssc_dai.h"
#define MCLK_RATE 12288000
#define DRV_NAME "sam9x5-snd-wm8731"
struct sam9x5_drvdata {
int ssc_id;
};
/*
* Logic for a wm8731 as connected on a at91sam9x5ek based board.
*/
static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct device *dev = rtd->dev;
int ret;
dev_dbg(dev, "%s called\n", __func__);
/* set the codec system clock for DAC and ADC */
ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
MCLK_RATE, SND_SOC_CLOCK_IN);
if (ret < 0) {
dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret);
return ret;
}
return 0;
}
/*
* Audio paths on at91sam9x5ek board:
*
* |A| ------------> | | ---R----> Headphone Jack
* |T| <----\ | WM | ---L--/
* |9| ---> CLK <--> | 8731 | <--R----- Line In Jack
* |1| <------------ | | <--L--/
*/
static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_LINE("Line In Jack", NULL),
};
static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device_node *codec_np, *cpu_np;
struct snd_soc_card *card;
struct snd_soc_dai_link *dai;
struct sam9x5_drvdata *priv;
int ret;
if (!np) {
dev_err(&pdev->dev, "No device node supplied\n");
return -EINVAL;
}
card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
if (!dai || !card || !priv) {
ret = -ENOMEM;
goto out;
}
snd_soc_card_set_drvdata(card, priv);
card->dev = &pdev->dev;
card->owner = THIS_MODULE;
card->dai_link = dai;
card->num_links = 1;
card->dapm_widgets = sam9x5_dapm_widgets;
card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets);
dai->name = "WM8731";
dai->stream_name = "WM8731 PCM";
dai->codec_dai_name = "wm8731-hifi";
dai->init = sam9x5_wm8731_init;
dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM;
ret = snd_soc_of_parse_card_name(card, "atmel,model");
if (ret) {
dev_err(&pdev->dev, "atmel,model node missing\n");
goto out;
}
ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
if (ret) {
dev_err(&pdev->dev, "atmel,audio-routing node missing\n");
goto out;
}
codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
if (!codec_np) {
dev_err(&pdev->dev, "atmel,audio-codec node missing\n");
ret = -EINVAL;
goto out;
}
dai->codec_of_node = codec_np;
cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
if (!cpu_np) {
dev_err(&pdev->dev, "atmel,ssc-controller node missing\n");
ret = -EINVAL;
goto out;
}
dai->cpu_of_node = cpu_np;
dai->platform_of_node = cpu_np;
priv->ssc_id = of_alias_get_id(cpu_np, "ssc");
ret = atmel_ssc_set_audio(priv->ssc_id);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to set SSC %d for audio: %d\n",
ret, priv->ssc_id);
goto out;
}
of_node_put(codec_np);
of_node_put(cpu_np);
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "Platform device allocation failed\n");
goto out_put_audio;
}
dev_dbg(&pdev->dev, "%s ok\n", __func__);
return ret;
out_put_audio:
atmel_ssc_put_audio(priv->ssc_id);
out:
return ret;
}
static int sam9x5_wm8731_driver_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct sam9x5_drvdata *priv = card->drvdata;
snd_soc_unregister_card(card);
atmel_ssc_put_audio(priv->ssc_id);
return 0;
}
static const struct of_device_id sam9x5_wm8731_of_match[] = {
{ .compatible = "atmel,sam9x5-wm8731-audio", },
{},
};
MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);
static struct platform_driver sam9x5_wm8731_driver = {
.driver = {
.name = DRV_NAME,
.of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
},
.probe = sam9x5_wm8731_driver_probe,
.remove = sam9x5_wm8731_driver_remove,
};
module_platform_driver(sam9x5_wm8731_driver);
/* Module information */
MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
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