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        .driver_name = "tegra",
  58        .owner = THIS_MODULE,
  59        .dai_link = &tegra_wm9712_dai,
  60        .num_links = 1,
  61
  62        .dapm_widgets = tegra_wm9712_dapm_widgets,
  63        .num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
  64        .fully_routed = true,
  65};
  66
  67static int tegra_wm9712_driver_probe(struct platform_device *pdev)
  68{
  69        struct device_node *np = pdev->dev.of_node;
  70        struct snd_soc_card *card = &snd_soc_tegra_wm9712;
  71        struct tegra_wm9712 *machine;
  72        int ret;
  73
  74        machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
  75                               GFP_KERNEL);
  76        if (!machine)
  77                return -ENOMEM;
  78
  79        card->dev = &pdev->dev;
  80        snd_soc_card_set_drvdata(card, machine);
  81
  82        machine->codec = platform_device_alloc("wm9712-codec", -1);
  83        if (!machine->codec) {
  84                dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
  85                return -ENOMEM;
  86        }
  87
  88        ret = platform_device_add(machine->codec);
  89        if (ret)
  90                goto codec_put;
  91
  92        ret = snd_soc_of_parse_card_name(card, "nvidia,model");
  93        if (ret)
  94                goto codec_unregister;
  95
  96        ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
  97        if (ret)
  98                goto codec_unregister;
  99
 100        tegra_wm9712_dai.cpus->of_node = of_parse_phandle(np,
 101                                       "nvidia,ac97-controller", 0);
 102        if (!tegra_wm9712_dai.cpus->of_node) {
 103                dev_err(&pdev->dev,
 104                        "Property 'nvidia,ac97-controller' missing or invalid\n");
 105                ret = -EINVAL;
 106                goto codec_unregister;
 107        }
 108
 109        tegra_wm9712_dai.platforms->of_node = tegra_wm9712_dai.cpus->of_node;
 110
 111        ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 112        if (ret)
 113                goto codec_unregister;
 114
 115        ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
 116        if (ret)
 117                goto codec_unregister;
 118
 119        ret = snd_soc_register_card(card);
 120        if (ret) {
 121                dev_err_probe(&pdev->dev, ret,
 122                              "snd_soc_register_card failed\n");
 123                goto codec_unregister;
 124        }
 125
 126        return 0;
 127
 128codec_unregister:
 129        platform_device_del(machine->codec);
 130codec_put:
 131        platform_device_put(machine->codec);
 132        return ret;
 133}
 134
 135static int tegra_wm9712_driver_remove(struct platform_device *pdev)
 136{
 137        struct snd_soc_card *card = platform_get_drvdata(pdev);
 138        struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
 139
 140        snd_soc_unregister_card(card);
 141
 142        platform_device_unregister(machine->codec);
 143
 144        return 0;
 145}
 146
 147static const struct of_device_id tegra_wm9712_of_match[] = {
 148        { .compatible = "nvidia,tegra-audio-wm9712", },
 149        {},
 150};
 151
 152static struct platform_driver tegra_wm9712_driver = {
 153        .driver = {
 154                .name = DRV_NAME,
 155                .pm = &snd_soc_pm_ops,
 156                .of_match_table = tegra_wm9712_of_match,
 157        },
 158        .probe = tegra_wm9712_driver_probe,
 159        .remove = tegra_wm9712_driver_remove,
 160};
 161module_platform_driver(tegra_wm9712_driver);
 162
 163MODULE_AUTHOR("Lucas Stach");
 164MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
 165MODULE_LICENSE("GPL v2");
 166MODULE_ALIAS("platform:" DRV_NAME);
 167MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);
 168