176 lines
4.4 KiB
C
176 lines
4.4 KiB
C
/*
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* tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.
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*
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* Copyright 2012 Lucas Stach <dev@lynxeye.de>
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*
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* Partly based on code copyright/by:
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* Copyright 2011,2012 Toradex Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <sound/core.h>
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#include <sound/jack.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include "tegra_asoc_utils.h"
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#define DRV_NAME "tegra-snd-wm9712"
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struct tegra_wm9712 {
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struct platform_device *codec;
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struct tegra_asoc_utils_data util_data;
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};
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static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone", NULL),
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SND_SOC_DAPM_LINE("LineIn", NULL),
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SND_SOC_DAPM_MIC("Mic", NULL),
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};
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static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd)
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{
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return snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "Mic Bias");
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}
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static struct snd_soc_dai_link tegra_wm9712_dai = {
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.name = "AC97 HiFi",
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.stream_name = "AC97 HiFi",
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.codec_dai_name = "wm9712-hifi",
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.codec_name = "wm9712-codec",
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.init = tegra_wm9712_init,
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};
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static struct snd_soc_card snd_soc_tegra_wm9712 = {
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.name = "tegra-wm9712",
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.owner = THIS_MODULE,
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.dai_link = &tegra_wm9712_dai,
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.num_links = 1,
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.dapm_widgets = tegra_wm9712_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
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.fully_routed = true,
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};
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static int tegra_wm9712_driver_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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struct snd_soc_card *card = &snd_soc_tegra_wm9712;
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struct tegra_wm9712 *machine;
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int ret;
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machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
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GFP_KERNEL);
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if (!machine)
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return -ENOMEM;
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card->dev = &pdev->dev;
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snd_soc_card_set_drvdata(card, machine);
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machine->codec = platform_device_alloc("wm9712-codec", -1);
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if (!machine->codec) {
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dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
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return -ENOMEM;
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}
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ret = platform_device_add(machine->codec);
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if (ret)
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goto codec_put;
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ret = snd_soc_of_parse_card_name(card, "nvidia,model");
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if (ret)
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goto codec_unregister;
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ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
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if (ret)
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goto codec_unregister;
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tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,
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"nvidia,ac97-controller", 0);
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if (!tegra_wm9712_dai.cpu_of_node) {
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dev_err(&pdev->dev,
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"Property 'nvidia,ac97-controller' missing or invalid\n");
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ret = -EINVAL;
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goto codec_unregister;
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}
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tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;
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ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
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if (ret)
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goto codec_unregister;
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ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
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if (ret)
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goto asoc_utils_fini;
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ret = snd_soc_register_card(card);
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if (ret) {
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
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ret);
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goto asoc_utils_fini;
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}
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return 0;
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asoc_utils_fini:
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tegra_asoc_utils_fini(&machine->util_data);
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codec_unregister:
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platform_device_del(machine->codec);
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codec_put:
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platform_device_put(machine->codec);
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return ret;
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}
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static int tegra_wm9712_driver_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
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snd_soc_unregister_card(card);
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tegra_asoc_utils_fini(&machine->util_data);
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platform_device_unregister(machine->codec);
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return 0;
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}
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static const struct of_device_id tegra_wm9712_of_match[] = {
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{ .compatible = "nvidia,tegra-audio-wm9712", },
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{},
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};
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static struct platform_driver tegra_wm9712_driver = {
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.driver = {
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.name = DRV_NAME,
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.pm = &snd_soc_pm_ops,
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.of_match_table = tegra_wm9712_of_match,
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},
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.probe = tegra_wm9712_driver_probe,
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.remove = tegra_wm9712_driver_remove,
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};
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module_platform_driver(tegra_wm9712_driver);
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MODULE_AUTHOR("Lucas Stach");
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MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:" DRV_NAME);
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MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);
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