sound/soc/tegra/tegra_wm9712.c

   1 /*
   2  * tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.
   3  *
   4  * Copyright 2012 Lucas Stach <dev@lynxeye.de>
   5  *
   6  * Partly based on code copyright/by:
   7  * Copyright 2011,2012 Toradex Inc.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/slab.h>
  23 #include <linux/gpio.h>
  24 #include <linux/of_gpio.h>
  25
  26 #include <sound/core.h>
  27 #include <sound/jack.h>
  28 #include <sound/pcm.h>
  29 #include <sound/pcm_params.h>
  30 #include <sound/soc.h>
  31
  32 #include "tegra_asoc_utils.h"
  33
  34 #define DRV_NAME "tegra-snd-wm9712"
  35
  36 struct tegra_wm9712 {
  37         struct platform_device *codec;
  38         struct tegra_asoc_utils_data util_data;
  39 };
  40
  41 static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = {
  42         SND_SOC_DAPM_HP("Headphone", NULL),
  43         SND_SOC_DAPM_LINE("LineIn", NULL),
  44         SND_SOC_DAPM_MIC("Mic", NULL),
  45 };
  46
  47 static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd)
  48 {
  49         return snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "Mic Bias");
  50 }
  51
  52 static struct snd_soc_dai_link tegra_wm9712_dai = {
  53         .name = "AC97 HiFi",
  54         .stream_name = "AC97 HiFi",
  55         .codec_dai_name = "wm9712-hifi",
  56         .codec_name = "wm9712-codec",
  57         .init = tegra_wm9712_init,
  58 };
  59
  60 static struct snd_soc_card snd_soc_tegra_wm9712 = {
  61         .name = "tegra-wm9712",
  62         .owner = THIS_MODULE,
  63         .dai_link = &tegra_wm9712_dai,
  64         .num_links = 1,
  65
  66         .dapm_widgets = tegra_wm9712_dapm_widgets,
  67         .num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
  68         .fully_routed = true,
  69 };
  70
  71 static int tegra_wm9712_driver_probe(struct platform_device *pdev)
  72 {
  73         struct device_node *np = pdev->dev.of_node;
  74         struct snd_soc_card *card = &snd_soc_tegra_wm9712;
  75         struct tegra_wm9712 *machine;
  76         int ret;
  77
  78         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
  79                                GFP_KERNEL);
  80         if (!machine) {
  81                 dev_err(&pdev->dev, "Can't allocate tegra_wm9712 struct\n");
  82                 return -ENOMEM;
  83         }
  84
  85         card->dev = &pdev->dev;
  86         platform_set_drvdata(pdev, card);
  87         snd_soc_card_set_drvdata(card, machine);
  88
  89         machine->codec = platform_device_alloc("wm9712-codec", -1);
  90         if (!machine->codec) {
  91                 dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
  92                 return -ENOMEM;
  93         }
  94
  95         ret = platform_device_add(machine->codec);
  96         if (ret)
  97                 goto codec_put;
  98
  99         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 100         if (ret)
 101                 goto codec_unregister;
 102
 103         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 104         if (ret)
 105                 goto codec_unregister;
 106
 107         tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,
 108                                        "nvidia,ac97-controller", 0);
 109         if (!tegra_wm9712_dai.cpu_of_node) {
 110                 dev_err(&pdev->dev,
 111                         "Property 'nvidia,ac97-controller' missing or invalid\n");
 112                 ret = -EINVAL;
 113                 goto codec_unregister;
 114         }
 115
 116         tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;
 117
 118         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 119         if (ret)
 120                 goto codec_unregister;
 121
 122         ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
 123         if (ret)
 124                 goto asoc_utils_fini;
 125
 126         ret = snd_soc_register_card(card);
 127         if (ret) {
 128                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 129                         ret);
 130                 goto asoc_utils_fini;
 131         }
 132
 133         return 0;
 134
 135 asoc_utils_fini:
 136         tegra_asoc_utils_fini(&machine->util_data);
 137 codec_unregister:
 138         platform_device_del(machine->codec);
 139 codec_put:
 140         platform_device_put(machine->codec);
 141         return ret;
 142 }
 143
 144 static int tegra_wm9712_driver_remove(struct platform_device *pdev)
 145 {
 146         struct snd_soc_card *card = platform_get_drvdata(pdev);
 147         struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
 148
 149         snd_soc_unregister_card(card);
 150
 151         tegra_asoc_utils_fini(&machine->util_data);
 152
 153         platform_device_unregister(machine->codec);
 154
 155         return 0;
 156 }
 157
 158 static const struct of_device_id tegra_wm9712_of_match[] = {
 159         { .compatible = "nvidia,tegra-audio-wm9712", },
 160         {},
 161 };
 162
 163 static struct platform_driver tegra_wm9712_driver = {
 164         .driver = {
 165                 .name = DRV_NAME,
 166                 .pm = &snd_soc_pm_ops,
 167                 .of_match_table = tegra_wm9712_of_match,
 168         },
 169         .probe = tegra_wm9712_driver_probe,
 170         .remove = tegra_wm9712_driver_remove,
 171 };
 172 module_platform_driver(tegra_wm9712_driver);
 173
 174 MODULE_AUTHOR("Lucas Stach");
 175 MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
 176 MODULE_LICENSE("GPL v2");
 177 MODULE_ALIAS("platform:" DRV_NAME);
 178 MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);