LXR linux/sound/soc/tegra/tegra

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.
   4 *
   5 * Copyright 2012 Lucas Stach <dev@lynxeye.de>
   6 *
   7 * Partly based on code copyright/by:
   8 * Copyright 2011,2012 Toradex Inc.
   9 */
  10
  11#include <linux/module.h>
  12#include <linux/platform_device.h>
  13#include <linux/slab.h>
  14#include <linux/gpio.h>
  15#include <linux/of_gpio.h>
  16
  17#include <sound/core.h>
  18#include <sound/jack.h>
  19#include <sound/pcm.h>
  20#include <sound/pcm_params.h>
  21#include <sound/soc.h>
  22
  23#include "tegra_asoc_utils.h"
  24
  25#define DRV_NAME "tegra-snd-wm9712"
  26
  27struct tegra_wm9712 {
  28        struct platform_device *codec;
  29        struct tegra_asoc_utils_data util_data;
  30};
  31
  32static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = {
  33        SND_SOC_DAPM_HP("Headphone", NULL),
  34        SND_SOC_DAPM_LINE("LineIn", NULL),
  35        SND_SOC_DAPM_MIC("Mic", NULL),
  36};
  37
  38static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd)
  39{
  40        return snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "Mic Bias");
  41}
  42
  43SND_SOC_DAILINK_DEFS(hifi,
  44        DAILINK_COMP_ARRAY(COMP_EMPTY()),
  45        DAILINK_COMP_ARRAY(COMP_CODEC("wm9712-codec", "wm9712-hifi")),
  46        DAILINK_COMP_ARRAY(COMP_EMPTY()));
  47
  48static struct snd_soc_dai_link tegra_wm9712_dai = {
  49        .name = "AC97 HiFi",
  50        .stream_name = "AC97 HiFi",
  51        .init = tegra_wm9712_init,
  52        SND_SOC_DAILINK_REG(hifi),
  53};
  54
  55static struct snd_soc_card snd_soc_tegra_wm9712 = {
  56        .name = "tegra-wm9712",
  57        .owner = THIS_MODULE,
  58        .dai_link = &tegra_wm9712_dai,
  59        .num_links = 1,
  60
  61        .dapm_widgets = tegra_wm9712_dapm_widgets,
  62        .num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
  63        .fully_routed = true,
  64};
  65
  66static int tegra_wm9712_driver_probe(struct platform_device *pdev)
  67{
  68        struct device_node *np = pdev->dev.of_node;
  69        struct snd_soc_card *card = &snd_soc_tegra_wm9712;
  70        struct tegra_wm9712 *machine;
  71        int ret;
  72
  73        machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
  74                               GFP_KERNEL);
  75        if (!machine)
  76                return -ENOMEM;
  77
  78        card->dev = &pdev->dev;
  79        snd_soc_card_set_drvdata(card, machine);
  80
  81        machine->codec = platform_device_alloc("wm9712-codec", -1);
  82        if (!machine->codec) {
  83                dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
  84                return -ENOMEM;
  85        }
  86
  87        ret = platform_device_add(machine->codec);
  88        if (ret)
  89                goto codec_put;
  90
  91        ret = snd_soc_of_parse_card_name(card, "nvidia,model");
  92        if (ret)
  93                goto codec_unregister;
  94
  95        ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
  96        if (ret)
  97                goto codec_unregister;
  98
  99        tegra_wm9712_dai.cpus->of_node = of_parse_phandle(np,
 100                                       "nvidia,ac97-controller", 0);
 101        if (!tegra_wm9712_dai.cpus->of_node) {
 102                dev_err(&pdev->dev,
 103                        "Property 'nvidia,ac97-controller' missing or invalid\n");
 104                ret = -EINVAL;
 105                goto codec_unregister;
 106        }
 107
 108        tegra_wm9712_dai.platforms->of_node = tegra_wm9712_dai.cpus->of_node;
 109
 110        ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 111        if (ret)
 112                goto codec_unregister;
 113
 114        ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
 115        if (ret)
 116                goto asoc_utils_fini;
 117
 118        ret = snd_soc_register_card(card);
 119        if (ret) {
 120                dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 121                        ret);
 122                goto asoc_utils_fini;
 123        }
 124
 125        return 0;
 126
 127asoc_utils_fini:
 128        tegra_asoc_utils_fini(&machine->util_data);
 129codec_unregister:
 130        platform_device_del(machine->codec);
 131codec_put:
 132        platform_device_put(machine->codec);
 133        return ret;
 134}
 135
 136static int tegra_wm9712_driver_remove(struct platform_device *pdev)
 137{
 138        struct snd_soc_card *card = platform_get_drvdata(pdev);
 139        struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
 140
 141        snd_soc_unregister_card(card);
 142
 143        tegra_asoc_utils_fini(&machine->util_data);
 144
 145        platform_device_unregister(machine->codec);
 146
 147        return 0;
 148}
 149
 150static const struct of_device_id tegra_wm9712_of_match[] = {
 151        { .compatible = "nvidia,tegra-audio-wm9712", },
 152        {},
 153};
 154
 155static struct platform_driver tegra_wm9712_driver = {
 156        .driver = {
 157                .name = DRV_NAME,
 158                .pm = &snd_soc_pm_ops,
 159                .of_match_table = tegra_wm9712_of_match,
 160        },
 161        .probe = tegra_wm9712_driver_probe,
 162        .remove = tegra_wm9712_driver_remove,
 163};
 164module_platform_driver(tegra_wm9712_driver);
 165
 166MODULE_AUTHOR("Lucas Stach");
 167MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
 168MODULE_LICENSE("GPL v2");
 169MODULE_ALIAS("platform:" DRV_NAME);
 170MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);
 171