tegra_wm9712.c
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/*
* tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.
*
* Copyright 2012 Lucas Stach <dev@lynxeye.de>
*
* Partly based on code copyright/by:
* Copyright 2011,2012 Toradex Inc.
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "tegra_asoc_utils.h"
#define DRV_NAME "tegra-snd-wm9712"
struct tegra_wm9712 {
struct platform_device *codec;
struct tegra_asoc_utils_data util_data;
};
static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone", NULL),
SND_SOC_DAPM_LINE("LineIn", NULL),
SND_SOC_DAPM_MIC("Mic", NULL),
};
static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd)
{
return snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "Mic Bias");
}
static struct snd_soc_dai_link tegra_wm9712_dai = {
.name = "AC97 HiFi",
.stream_name = "AC97 HiFi",
.codec_dai_name = "wm9712-hifi",
.codec_name = "wm9712-codec",
.init = tegra_wm9712_init,
};
static struct snd_soc_card snd_soc_tegra_wm9712 = {
.name = "tegra-wm9712",
.owner = THIS_MODULE,
.dai_link = &tegra_wm9712_dai,
.num_links = 1,
.dapm_widgets = tegra_wm9712_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
.fully_routed = true,
};
static int tegra_wm9712_driver_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct snd_soc_card *card = &snd_soc_tegra_wm9712;
struct tegra_wm9712 *machine;
int ret;
machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
GFP_KERNEL);
if (!machine) {
dev_err(&pdev->dev, "Can't allocate tegra_wm9712 struct\n");
return -ENOMEM;
}
card->dev = &pdev->dev;
platform_set_drvdata(pdev, card);
snd_soc_card_set_drvdata(card, machine);
machine->codec = platform_device_alloc("wm9712-codec", -1);
if (!machine->codec) {
dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
return -ENOMEM;
}
ret = platform_device_add(machine->codec);
if (ret)
goto codec_put;
ret = snd_soc_of_parse_card_name(card, "nvidia,model");
if (ret)
goto codec_unregister;
ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
if (ret)
goto codec_unregister;
tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,
"nvidia,ac97-controller", 0);
if (!tegra_wm9712_dai.cpu_of_node) {
dev_err(&pdev->dev,
"Property 'nvidia,ac97-controller' missing or invalid\n");
ret = -EINVAL;
goto codec_unregister;
}
tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;
ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
if (ret)
goto codec_unregister;
ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
if (ret)
goto asoc_utils_fini;
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
ret);
goto asoc_utils_fini;
}
return 0;
asoc_utils_fini:
tegra_asoc_utils_fini(&machine->util_data);
codec_unregister:
platform_device_del(machine->codec);
codec_put:
platform_device_put(machine->codec);
return ret;
}
static int tegra_wm9712_driver_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
snd_soc_unregister_card(card);
tegra_asoc_utils_fini(&machine->util_data);
platform_device_unregister(machine->codec);
return 0;
}
static const struct of_device_id tegra_wm9712_of_match[] = {
{ .compatible = "nvidia,tegra-audio-wm9712", },
{},
};
static struct platform_driver tegra_wm9712_driver = {
.driver = {
.name = DRV_NAME,
.pm = &snd_soc_pm_ops,
.of_match_table = tegra_wm9712_of_match,
},
.probe = tegra_wm9712_driver_probe,
.remove = tegra_wm9712_driver_remove,
};
module_platform_driver(tegra_wm9712_driver);
MODULE_AUTHOR("Lucas Stach");
MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);