sound/soc/tegra/tegra_wm9712.c

   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
  27 struct tegra_wm9712 {
  28         struct platform_device *codec;
  29         struct tegra_asoc_utils_data util_data;
  30 };
  31
  32 static 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
  38 static 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
  43 SND_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
  48 static 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
  55 static 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
  67 static 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(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 122                         ret);
 123                 goto codec_unregister;
 124         }
 125
 126         return 0;
 127
 128 codec_unregister:
 129         platform_device_del(machine->codec);
 130 codec_put:
 131         platform_device_put(machine->codec);
 132         return ret;
 133 }
 134
 135 static 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
 147 static const struct of_device_id tegra_wm9712_of_match[] = {
 148         { .compatible = "nvidia,tegra-audio-wm9712", },
 149         {},
 150 };
 151
 152 static 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 };
 161 module_platform_driver(tegra_wm9712_driver);
 162
 163 MODULE_AUTHOR("Lucas Stach");
 164 MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
 165 MODULE_LICENSE("GPL v2");
 166 MODULE_ALIAS("platform:" DRV_NAME);
 167 MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);