linux/sound/soc/mediatek/mt2701/mt2701-wm8960.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * mt2701-wm8960.c  --  MT2701 WM8960 ALSA SoC machine driver
   4 *
   5 * Copyright (c) 2017 MediaTek Inc.
   6 * Author: Ryder Lee <ryder.lee@mediatek.com>
   7 */
   8
   9#include <linux/module.h>
  10#include <sound/soc.h>
  11
  12#include "mt2701-afe-common.h"
  13
  14static const struct snd_soc_dapm_widget mt2701_wm8960_widgets[] = {
  15        SND_SOC_DAPM_HP("Headphone", NULL),
  16        SND_SOC_DAPM_MIC("AMIC", NULL),
  17};
  18
  19static const struct snd_kcontrol_new mt2701_wm8960_controls[] = {
  20        SOC_DAPM_PIN_SWITCH("Headphone"),
  21        SOC_DAPM_PIN_SWITCH("AMIC"),
  22};
  23
  24static int mt2701_wm8960_be_ops_hw_params(struct snd_pcm_substream *substream,
  25                                          struct snd_pcm_hw_params *params)
  26{
  27        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  28        struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  29        struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  30        unsigned int mclk_rate;
  31        unsigned int rate = params_rate(params);
  32        unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
  33        unsigned int div_bck_over_lrck = 64;
  34
  35        mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;
  36
  37        snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);
  38        snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);
  39
  40        return 0;
  41}
  42
  43static const struct snd_soc_ops mt2701_wm8960_be_ops = {
  44        .hw_params = mt2701_wm8960_be_ops_hw_params
  45};
  46
  47SND_SOC_DAILINK_DEFS(playback,
  48        DAILINK_COMP_ARRAY(COMP_CPU("PCMO0")),
  49        DAILINK_COMP_ARRAY(COMP_DUMMY()),
  50        DAILINK_COMP_ARRAY(COMP_EMPTY()));
  51
  52SND_SOC_DAILINK_DEFS(capture,
  53        DAILINK_COMP_ARRAY(COMP_CPU("PCM0")),
  54        DAILINK_COMP_ARRAY(COMP_DUMMY()),
  55        DAILINK_COMP_ARRAY(COMP_EMPTY()));
  56
  57SND_SOC_DAILINK_DEFS(codec,
  58        DAILINK_COMP_ARRAY(COMP_CPU("I2S0")),
  59        DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8960-hifi")),
  60        DAILINK_COMP_ARRAY(COMP_EMPTY()));
  61
  62static struct snd_soc_dai_link mt2701_wm8960_dai_links[] = {
  63        /* FE */
  64        {
  65                .name = "wm8960-playback",
  66                .stream_name = "wm8960-playback",
  67                .trigger = {SND_SOC_DPCM_TRIGGER_POST,
  68                            SND_SOC_DPCM_TRIGGER_POST},
  69                .dynamic = 1,
  70                .dpcm_playback = 1,
  71                SND_SOC_DAILINK_REG(playback),
  72        },
  73        {
  74                .name = "wm8960-capture",
  75                .stream_name = "wm8960-capture",
  76                .trigger = {SND_SOC_DPCM_TRIGGER_POST,
  77                            SND_SOC_DPCM_TRIGGER_POST},
  78                .dynamic = 1,
  79                .dpcm_capture = 1,
  80                SND_SOC_DAILINK_REG(capture),
  81        },
  82        /* BE */
  83        {
  84                .name = "wm8960-codec",
  85                .no_pcm = 1,
  86                .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
  87                        | SND_SOC_DAIFMT_GATED,
  88                .ops = &mt2701_wm8960_be_ops,
  89                .dpcm_playback = 1,
  90                .dpcm_capture = 1,
  91                SND_SOC_DAILINK_REG(codec),
  92        },
  93};
  94
  95static struct snd_soc_card mt2701_wm8960_card = {
  96        .name = "mt2701-wm8960",
  97        .owner = THIS_MODULE,
  98        .dai_link = mt2701_wm8960_dai_links,
  99        .num_links = ARRAY_SIZE(mt2701_wm8960_dai_links),
 100        .controls = mt2701_wm8960_controls,
 101        .num_controls = ARRAY_SIZE(mt2701_wm8960_controls),
 102        .dapm_widgets = mt2701_wm8960_widgets,
 103        .num_dapm_widgets = ARRAY_SIZE(mt2701_wm8960_widgets),
 104};
 105
 106static int mt2701_wm8960_machine_probe(struct platform_device *pdev)
 107{
 108        struct snd_soc_card *card = &mt2701_wm8960_card;
 109        struct device_node *platform_node, *codec_node;
 110        struct snd_soc_dai_link *dai_link;
 111        int ret, i;
 112
 113        platform_node = of_parse_phandle(pdev->dev.of_node,
 114                                         "mediatek,platform", 0);
 115        if (!platform_node) {
 116                dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
 117                return -EINVAL;
 118        }
 119        for_each_card_prelinks(card, i, dai_link) {
 120                if (dai_link->platforms->name)
 121                        continue;
 122                dai_link->platforms->of_node = platform_node;
 123        }
 124
 125        card->dev = &pdev->dev;
 126
 127        codec_node = of_parse_phandle(pdev->dev.of_node,
 128                                      "mediatek,audio-codec", 0);
 129        if (!codec_node) {
 130                dev_err(&pdev->dev,
 131                        "Property 'audio-codec' missing or invalid\n");
 132                return -EINVAL;
 133        }
 134        for_each_card_prelinks(card, i, dai_link) {
 135                if (dai_link->codecs->name)
 136                        continue;
 137                dai_link->codecs->of_node = codec_node;
 138        }
 139
 140        ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
 141        if (ret) {
 142                dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
 143                return ret;
 144        }
 145
 146        ret = devm_snd_soc_register_card(&pdev->dev, card);
 147        if (ret)
 148                dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
 149                        __func__, ret);
 150
 151        return ret;
 152}
 153
 154#ifdef CONFIG_OF
 155static const struct of_device_id mt2701_wm8960_machine_dt_match[] = {
 156        {.compatible = "mediatek,mt2701-wm8960-machine",},
 157        {}
 158};
 159#endif
 160
 161static struct platform_driver mt2701_wm8960_machine = {
 162        .driver = {
 163                .name = "mt2701-wm8960",
 164#ifdef CONFIG_OF
 165                .of_match_table = mt2701_wm8960_machine_dt_match,
 166#endif
 167        },
 168        .probe = mt2701_wm8960_machine_probe,
 169};
 170
 171module_platform_driver(mt2701_wm8960_machine);
 172
 173/* Module information */
 174MODULE_DESCRIPTION("MT2701 WM8960 ALSA SoC machine driver");
 175MODULE_AUTHOR("Ryder Lee <ryder.lee@mediatek.com>");
 176MODULE_LICENSE("GPL v2");
 177MODULE_ALIAS("mt2701 wm8960 soc card");
 178
 179