linux/sound/soc/tegra/tegra_wm8753.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * tegra_wm8753.c - Tegra machine ASoC driver for boards using WM8753 codec.
   4 *
   5 * Author: Stephen Warren <swarren@nvidia.com>
   6 * Copyright (C) 2010-2012 - NVIDIA, Inc.
   7 *
   8 * Based on code copyright/by:
   9 *
  10 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
  11 *
  12 * Copyright 2007 Wolfson Microelectronics PLC.
  13 * Author: Graeme Gregory
  14 *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
  15 */
  16
  17#include <linux/module.h>
  18#include <linux/platform_device.h>
  19#include <linux/slab.h>
  20#include <linux/gpio.h>
  21#include <linux/of_gpio.h>
  22
  23#include <sound/core.h>
  24#include <sound/jack.h>
  25#include <sound/pcm.h>
  26#include <sound/pcm_params.h>
  27#include <sound/soc.h>
  28
  29#include "../codecs/wm8753.h"
  30
  31#include "tegra_asoc_utils.h"
  32
  33#define DRV_NAME "tegra-snd-wm8753"
  34
  35struct tegra_wm8753 {
  36        struct tegra_asoc_utils_data util_data;
  37};
  38
  39static int tegra_wm8753_hw_params(struct snd_pcm_substream *substream,
  40                                        struct snd_pcm_hw_params *params)
  41{
  42        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  43        struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  44        struct snd_soc_card *card = rtd->card;
  45        struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
  46        int srate, mclk;
  47        int err;
  48
  49        srate = params_rate(params);
  50        switch (srate) {
  51        case 11025:
  52        case 22050:
  53        case 44100:
  54        case 88200:
  55                mclk = 11289600;
  56                break;
  57        default:
  58                mclk = 12288000;
  59                break;
  60        }
  61
  62        err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
  63        if (err < 0) {
  64                dev_err(card->dev, "Can't configure clocks\n");
  65                return err;
  66        }
  67
  68        err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,
  69                                        SND_SOC_CLOCK_IN);
  70        if (err < 0) {
  71                dev_err(card->dev, "codec_dai clock not set\n");
  72                return err;
  73        }
  74
  75        return 0;
  76}
  77
  78static const struct snd_soc_ops tegra_wm8753_ops = {
  79        .hw_params = tegra_wm8753_hw_params,
  80};
  81
  82static const struct snd_soc_dapm_widget tegra_wm8753_dapm_widgets[] = {
  83        SND_SOC_DAPM_HP("Headphone Jack", NULL),
  84        SND_SOC_DAPM_MIC("Mic Jack", NULL),
  85};
  86
  87SND_SOC_DAILINK_DEFS(pcm,
  88        DAILINK_COMP_ARRAY(COMP_EMPTY()),
  89        DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8753-hifi")),
  90        DAILINK_COMP_ARRAY(COMP_EMPTY()));
  91
  92static struct snd_soc_dai_link tegra_wm8753_dai = {
  93        .name = "WM8753",
  94        .stream_name = "WM8753 PCM",
  95        .ops = &tegra_wm8753_ops,
  96        .dai_fmt = SND_SOC_DAIFMT_I2S |
  97                        SND_SOC_DAIFMT_NB_NF |
  98                        SND_SOC_DAIFMT_CBS_CFS,
  99        SND_SOC_DAILINK_REG(pcm),
 100};
 101
 102static struct snd_soc_card snd_soc_tegra_wm8753 = {
 103        .name = "tegra-wm8753",
 104        .driver_name = "tegra",
 105        .owner = THIS_MODULE,
 106        .dai_link = &tegra_wm8753_dai,
 107        .num_links = 1,
 108
 109        .dapm_widgets = tegra_wm8753_dapm_widgets,
 110        .num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
 111        .fully_routed = true,
 112};
 113
 114static int tegra_wm8753_driver_probe(struct platform_device *pdev)
 115{
 116        struct device_node *np = pdev->dev.of_node;
 117        struct snd_soc_card *card = &snd_soc_tegra_wm8753;
 118        struct tegra_wm8753 *machine;
 119        int ret;
 120
 121        machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
 122                               GFP_KERNEL);
 123        if (!machine)
 124                return -ENOMEM;
 125
 126        card->dev = &pdev->dev;
 127        snd_soc_card_set_drvdata(card, machine);
 128
 129        ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 130        if (ret)
 131                return ret;
 132
 133        ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 134        if (ret)
 135                return ret;
 136
 137        tegra_wm8753_dai.codecs->of_node = of_parse_phandle(np,
 138                        "nvidia,audio-codec", 0);
 139        if (!tegra_wm8753_dai.codecs->of_node) {
 140                dev_err(&pdev->dev,
 141                        "Property 'nvidia,audio-codec' missing or invalid\n");
 142                return -EINVAL;
 143        }
 144
 145        tegra_wm8753_dai.cpus->of_node = of_parse_phandle(np,
 146                        "nvidia,i2s-controller", 0);
 147        if (!tegra_wm8753_dai.cpus->of_node) {
 148                dev_err(&pdev->dev,
 149                        "Property 'nvidia,i2s-controller' missing or invalid\n");
 150                return -EINVAL;
 151        }
 152
 153        tegra_wm8753_dai.platforms->of_node = tegra_wm8753_dai.cpus->of_node;
 154
 155        ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 156        if (ret)
 157                return ret;
 158
 159        ret = devm_snd_soc_register_card(&pdev->dev, card);
 160        if (ret)
 161                return dev_err_probe(&pdev->dev, ret,
 162                                     "snd_soc_register_card failed\n");
 163
 164        return 0;
 165}
 166
 167static const struct of_device_id tegra_wm8753_of_match[] = {
 168        { .compatible = "nvidia,tegra-audio-wm8753", },
 169        {},
 170};
 171
 172static struct platform_driver tegra_wm8753_driver = {
 173        .driver = {
 174                .name = DRV_NAME,
 175                .pm = &snd_soc_pm_ops,
 176                .of_match_table = tegra_wm8753_of_match,
 177        },
 178        .probe = tegra_wm8753_driver_probe,
 179};
 180module_platform_driver(tegra_wm8753_driver);
 181
 182MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 183MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
 184MODULE_LICENSE("GPL");
 185MODULE_ALIAS("platform:" DRV_NAME);
 186MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);
 187