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 static struct snd_soc_dai_link tegra_wm9712_dai = {
  44         .name = "AC97 HiFi",
  45         .stream_name = "AC97 HiFi",
  46         .codec_dai_name = "wm9712-hifi",
  47         .codec_name = "wm9712-codec",
  48         .init = tegra_wm9712_init,
  49 };
  50
  51 static struct snd_soc_card snd_soc_tegra_wm9712 = {
  52         .name = "tegra-wm9712",
  53         .owner = THIS_MODULE,
  54         .dai_link = &tegra_wm9712_dai,
  55         .num_links = 1,
  56
  57         .dapm_widgets = tegra_wm9712_dapm_widgets,
  58         .num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
  59         .fully_routed = true,
  60 };
  61
  62 static int tegra_wm9712_driver_probe(struct platform_device *pdev)
  63 {
  64         struct device_node *np = pdev->dev.of_node;
  65         struct snd_soc_card *card = &snd_soc_tegra_wm9712;
  66         struct tegra_wm9712 *machine;
  67         int ret;
  68
  69         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
  70                                GFP_KERNEL);
  71         if (!machine)
  72                 return -ENOMEM;
  73
  74         card->dev = &pdev->dev;
  75         snd_soc_card_set_drvdata(card, machine);
  76
  77         machine->codec = platform_device_alloc("wm9712-codec", -1);
  78         if (!machine->codec) {
  79                 dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
  80                 return -ENOMEM;
  81         }
  82
  83         ret = platform_device_add(machine->codec);
  84         if (ret)
  85                 goto codec_put;
  86
  87         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
  88         if (ret)
  89                 goto codec_unregister;
  90
  91         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
  92         if (ret)
  93                 goto codec_unregister;
  94
  95         tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,
  96                                        "nvidia,ac97-controller", 0);
  97         if (!tegra_wm9712_dai.cpu_of_node) {
  98                 dev_err(&pdev->dev,
  99                         "Property 'nvidia,ac97-controller' missing or invalid\n");
 100                 ret = -EINVAL;
 101                 goto codec_unregister;
 102         }
 103
 104         tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;
 105
 106         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 107         if (ret)
 108                 goto codec_unregister;
 109
 110         ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
 111         if (ret)
 112                 goto asoc_utils_fini;
 113
 114         ret = snd_soc_register_card(card);
 115         if (ret) {
 116                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 117                         ret);
 118                 goto asoc_utils_fini;
 119         }
 120
 121         return 0;
 122
 123 asoc_utils_fini:
 124         tegra_asoc_utils_fini(&machine->util_data);
 125 codec_unregister:
 126         platform_device_del(machine->codec);
 127 codec_put:
 128         platform_device_put(machine->codec);
 129         return ret;
 130 }
 131
 132 static int tegra_wm9712_driver_remove(struct platform_device *pdev)
 133 {
 134         struct snd_soc_card *card = platform_get_drvdata(pdev);
 135         struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
 136
 137         snd_soc_unregister_card(card);
 138
 139         tegra_asoc_utils_fini(&machine->util_data);
 140
 141         platform_device_unregister(machine->codec);
 142
 143         return 0;
 144 }
 145
 146 static const struct of_device_id tegra_wm9712_of_match[] = {
 147         { .compatible = "nvidia,tegra-audio-wm9712", },
 148         {},
 149 };
 150
 151 static struct platform_driver tegra_wm9712_driver = {
 152         .driver = {
 153                 .name = DRV_NAME,
 154                 .pm = &snd_soc_pm_ops,
 155                 .of_match_table = tegra_wm9712_of_match,
 156         },
 157         .probe = tegra_wm9712_driver_probe,
 158         .remove = tegra_wm9712_driver_remove,
 159 };
 160 module_platform_driver(tegra_wm9712_driver);
 161
 162 MODULE_AUTHOR("Lucas Stach");
 163 MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
 164 MODULE_LICENSE("GPL v2");
 165 MODULE_ALIAS("platform:" DRV_NAME);
 166 MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);