LXR linux/sound/soc/tegra/tegra

   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
  36struct tegra_wm9712 {
  37        struct platform_device *codec;
  38        struct tegra_asoc_utils_data util_data;
  39};
  40
  41static 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
  47static 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
  52static 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
  60static 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
  71static 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                return -ENOMEM;
  82
  83        card->dev = &pdev->dev;
  84        snd_soc_card_set_drvdata(card, machine);
  85
  86        machine->codec = platform_device_alloc("wm9712-codec", -1);
  87        if (!machine->codec) {
  88                dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
  89                return -ENOMEM;
  90        }
  91
  92        ret = platform_device_add(machine->codec);
  93        if (ret)
  94                goto codec_put;
  95
  96        ret = snd_soc_of_parse_card_name(card, "nvidia,model");
  97        if (ret)
  98                goto codec_unregister;
  99
 100        ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 101        if (ret)
 102                goto codec_unregister;
 103
 104        tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,
 105                                       "nvidia,ac97-controller", 0);
 106        if (!tegra_wm9712_dai.cpu_of_node) {
 107                dev_err(&pdev->dev,
 108                        "Property 'nvidia,ac97-controller' missing or invalid\n");
 109                ret = -EINVAL;
 110                goto codec_unregister;
 111        }
 112
 113        tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;
 114
 115        ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 116        if (ret)
 117                goto codec_unregister;
 118
 119        ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
 120        if (ret)
 121                goto asoc_utils_fini;
 122
 123        ret = snd_soc_register_card(card);
 124        if (ret) {
 125                dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 126                        ret);
 127                goto asoc_utils_fini;
 128        }
 129
 130        return 0;
 131
 132asoc_utils_fini:
 133        tegra_asoc_utils_fini(&machine->util_data);
 134codec_unregister:
 135        platform_device_del(machine->codec);
 136codec_put:
 137        platform_device_put(machine->codec);
 138        return ret;
 139}
 140
 141static int tegra_wm9712_driver_remove(struct platform_device *pdev)
 142{
 143        struct snd_soc_card *card = platform_get_drvdata(pdev);
 144        struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
 145
 146        snd_soc_unregister_card(card);
 147
 148        tegra_asoc_utils_fini(&machine->util_data);
 149
 150        platform_device_unregister(machine->codec);
 151
 152        return 0;
 153}
 154
 155static const struct of_device_id tegra_wm9712_of_match[] = {
 156        { .compatible = "nvidia,tegra-audio-wm9712", },
 157        {},
 158};
 159
 160static struct platform_driver tegra_wm9712_driver = {
 161        .driver = {
 162                .name = DRV_NAME,
 163                .pm = &snd_soc_pm_ops,
 164                .of_match_table = tegra_wm9712_of_match,
 165        },
 166        .probe = tegra_wm9712_driver_probe,
 167        .remove = tegra_wm9712_driver_remove,
 168};
 169module_platform_driver(tegra_wm9712_driver);
 170
 171MODULE_AUTHOR("Lucas Stach");
 172MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
 173MODULE_LICENSE("GPL v2");
 174MODULE_ALIAS("platform:" DRV_NAME);
 175MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);
 176