sound/soc/mediatek/mt2701/mt2701-wm8960.c

   1 /*
   2  * mt2701-wm8960.c  --  MT2701 WM8960 ALSA SoC machine driver
   3  *
   4  * Copyright (c) 2017 MediaTek Inc.
   5  * Author: Ryder Lee <ryder.lee@mediatek.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 and
   9  * only version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <sound/soc.h>
  19
  20 #include "mt2701-afe-common.h"
  21
  22 static const struct snd_soc_dapm_widget mt2701_wm8960_widgets[] = {
  23         SND_SOC_DAPM_HP("Headphone", NULL),
  24         SND_SOC_DAPM_MIC("AMIC", NULL),
  25 };
  26
  27 static const struct snd_kcontrol_new mt2701_wm8960_controls[] = {
  28         SOC_DAPM_PIN_SWITCH("Headphone"),
  29         SOC_DAPM_PIN_SWITCH("AMIC"),
  30 };
  31
  32 static int mt2701_wm8960_be_ops_hw_params(struct snd_pcm_substream *substream,
  33                                           struct snd_pcm_hw_params *params)
  34 {
  35         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  36         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  37         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  38         unsigned int mclk_rate;
  39         unsigned int rate = params_rate(params);
  40         unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
  41         unsigned int div_bck_over_lrck = 64;
  42
  43         mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;
  44
  45         snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);
  46         snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);
  47
  48         return 0;
  49 }
  50
  51 static struct snd_soc_ops mt2701_wm8960_be_ops = {
  52         .hw_params = mt2701_wm8960_be_ops_hw_params
  53 };
  54
  55 static struct snd_soc_dai_link mt2701_wm8960_dai_links[] = {
  56         /* FE */
  57         {
  58                 .name = "wm8960-playback",
  59                 .stream_name = "wm8960-playback",
  60                 .cpu_dai_name = "PCMO0",
  61                 .codec_name = "snd-soc-dummy",
  62                 .codec_dai_name = "snd-soc-dummy-dai",
  63                 .trigger = {SND_SOC_DPCM_TRIGGER_POST,
  64                             SND_SOC_DPCM_TRIGGER_POST},
  65                 .dynamic = 1,
  66                 .dpcm_playback = 1,
  67         },
  68         {
  69                 .name = "wm8960-capture",
  70                 .stream_name = "wm8960-capture",
  71                 .cpu_dai_name = "PCM0",
  72                 .codec_name = "snd-soc-dummy",
  73                 .codec_dai_name = "snd-soc-dummy-dai",
  74                 .trigger = {SND_SOC_DPCM_TRIGGER_POST,
  75                             SND_SOC_DPCM_TRIGGER_POST},
  76                 .dynamic = 1,
  77                 .dpcm_capture = 1,
  78         },
  79         /* BE */
  80         {
  81                 .name = "wm8960-codec",
  82                 .cpu_dai_name = "I2S0",
  83                 .no_pcm = 1,
  84                 .codec_dai_name = "wm8960-hifi",
  85                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
  86                         | SND_SOC_DAIFMT_GATED,
  87                 .ops = &mt2701_wm8960_be_ops,
  88                 .dpcm_playback = 1,
  89                 .dpcm_capture = 1,
  90         },
  91 };
  92
  93 static struct snd_soc_card mt2701_wm8960_card = {
  94         .name = "mt2701-wm8960",
  95         .owner = THIS_MODULE,
  96         .dai_link = mt2701_wm8960_dai_links,
  97         .num_links = ARRAY_SIZE(mt2701_wm8960_dai_links),
  98         .controls = mt2701_wm8960_controls,
  99         .num_controls = ARRAY_SIZE(mt2701_wm8960_controls),
 100         .dapm_widgets = mt2701_wm8960_widgets,
 101         .num_dapm_widgets = ARRAY_SIZE(mt2701_wm8960_widgets),
 102 };
 103
 104 static int mt2701_wm8960_machine_probe(struct platform_device *pdev)
 105 {
 106         struct snd_soc_card *card = &mt2701_wm8960_card;
 107         struct device_node *platform_node, *codec_node;
 108         int ret, i;
 109
 110         platform_node = of_parse_phandle(pdev->dev.of_node,
 111                                          "mediatek,platform", 0);
 112         if (!platform_node) {
 113                 dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
 114                 return -EINVAL;
 115         }
 116         for (i = 0; i < card->num_links; i++) {
 117                 if (mt2701_wm8960_dai_links[i].platform_name)
 118                         continue;
 119                 mt2701_wm8960_dai_links[i].platform_of_node = platform_node;
 120         }
 121
 122         card->dev = &pdev->dev;
 123
 124         codec_node = of_parse_phandle(pdev->dev.of_node,
 125                                       "mediatek,audio-codec", 0);
 126         if (!codec_node) {
 127                 dev_err(&pdev->dev,
 128                         "Property 'audio-codec' missing or invalid\n");
 129                 return -EINVAL;
 130         }
 131         for (i = 0; i < card->num_links; i++) {
 132                 if (mt2701_wm8960_dai_links[i].codec_name)
 133                         continue;
 134                 mt2701_wm8960_dai_links[i].codec_of_node = codec_node;
 135         }
 136
 137         ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
 138         if (ret) {
 139                 dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
 140                 return ret;
 141         }
 142
 143         ret = devm_snd_soc_register_card(&pdev->dev, card);
 144         if (ret)
 145                 dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
 146                         __func__, ret);
 147
 148         return ret;
 149 }
 150
 151 #ifdef CONFIG_OF
 152 static const struct of_device_id mt2701_wm8960_machine_dt_match[] = {
 153         {.compatible = "mediatek,mt2701-wm8960-machine",},
 154         {}
 155 };
 156 #endif
 157
 158 static struct platform_driver mt2701_wm8960_machine = {
 159         .driver = {
 160                 .name = "mt2701-wm8960",
 161                 .owner = THIS_MODULE,
 162 #ifdef CONFIG_OF
 163                 .of_match_table = mt2701_wm8960_machine_dt_match,
 164 #endif
 165         },
 166         .probe = mt2701_wm8960_machine_probe,
 167 };
 168
 169 module_platform_driver(mt2701_wm8960_machine);
 170
 171 /* Module information */
 172 MODULE_DESCRIPTION("MT2701 WM8960 ALSA SoC machine driver");
 173 MODULE_AUTHOR("Ryder Lee <ryder.lee@mediatek.com>");
 174 MODULE_LICENSE("GPL v2");
 175 MODULE_ALIAS("mt2701 wm8960 soc card");
 176