sound/soc/samsung/tobermory.c

   1 /*
   2  * Tobermory audio support
   3  *
   4  * Copyright 2011 Wolfson Microelectronics
   5  *
   6  * This program is free software; you can redistribute  it and/or modify it
   7  * under  the terms of  the GNU General  Public License as published by the
   8  * Free Software Foundation;  either version 2 of the  License, or (at your
   9  * option) any later version.
  10  */
  11
  12 #include <sound/soc.h>
  13 #include <sound/soc-dapm.h>
  14 #include <sound/jack.h>
  15 #include <linux/gpio.h>
  16 #include <linux/module.h>
  17
  18 #include "../codecs/wm8962.h"
  19
  20 static int sample_rate = 44100;
  21
  22 static int tobermory_set_bias_level(struct snd_soc_card *card,
  23                                           struct snd_soc_dapm_context *dapm,
  24                                           enum snd_soc_bias_level level)
  25 {
  26         struct snd_soc_pcm_runtime *rtd;
  27         struct snd_soc_dai *codec_dai;
  28         int ret;
  29
  30         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
  31         codec_dai = rtd->codec_dai;
  32
  33         if (dapm->dev != codec_dai->dev)
  34                 return 0;
  35
  36         switch (level) {
  37         case SND_SOC_BIAS_PREPARE:
  38                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
  39                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  40                                                   WM8962_FLL_MCLK, 32768,
  41                                                   sample_rate * 512);
  42                         if (ret < 0)
  43                                 pr_err("Failed to start FLL: %d\n", ret);
  44
  45                         ret = snd_soc_dai_set_sysclk(codec_dai,
  46                                                      WM8962_SYSCLK_FLL,
  47                                                      sample_rate * 512,
  48                                                      SND_SOC_CLOCK_IN);
  49                         if (ret < 0) {
  50                                 pr_err("Failed to set SYSCLK: %d\n", ret);
  51                                 snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  52                                                     0, 0, 0);
  53                                 return ret;
  54                         }
  55                 }
  56                 break;
  57
  58         default:
  59                 break;
  60         }
  61
  62         return 0;
  63 }
  64
  65 static int tobermory_set_bias_level_post(struct snd_soc_card *card,
  66                                                struct snd_soc_dapm_context *dapm,
  67                                                enum snd_soc_bias_level level)
  68 {
  69         struct snd_soc_pcm_runtime *rtd;
  70         struct snd_soc_dai *codec_dai;
  71         int ret;
  72
  73         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
  74         codec_dai = rtd->codec_dai;
  75
  76         if (dapm->dev != codec_dai->dev)
  77                 return 0;
  78
  79         switch (level) {
  80         case SND_SOC_BIAS_STANDBY:
  81                 ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
  82                                              32768, SND_SOC_CLOCK_IN);
  83                 if (ret < 0) {
  84                         pr_err("Failed to switch away from FLL: %d\n", ret);
  85                         return ret;
  86                 }
  87
  88                 ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  89                                           0, 0, 0);
  90                 if (ret < 0) {
  91                         pr_err("Failed to stop FLL: %d\n", ret);
  92                         return ret;
  93                 }
  94                 break;
  95
  96         default:
  97                 break;
  98         }
  99
 100         dapm->bias_level = level;
 101
 102         return 0;
 103 }
 104
 105 static int tobermory_hw_params(struct snd_pcm_substream *substream,
 106                               struct snd_pcm_hw_params *params)
 107 {
 108         sample_rate = params_rate(params);
 109
 110         return 0;
 111 }
 112
 113 static struct snd_soc_ops tobermory_ops = {
 114         .hw_params = tobermory_hw_params,
 115 };
 116
 117 static struct snd_soc_dai_link tobermory_dai[] = {
 118         {
 119                 .name = "CPU",
 120                 .stream_name = "CPU",
 121                 .cpu_dai_name = "samsung-i2s.0",
 122                 .codec_dai_name = "wm8962",
 123                 .platform_name = "samsung-i2s.0",
 124                 .codec_name = "wm8962.1-001a",
 125                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 126                                 | SND_SOC_DAIFMT_CBM_CFM,
 127                 .ops = &tobermory_ops,
 128         },
 129 };
 130
 131 static const struct snd_kcontrol_new controls[] = {
 132         SOC_DAPM_PIN_SWITCH("Main Speaker"),
 133         SOC_DAPM_PIN_SWITCH("DMIC"),
 134 };
 135
 136 static struct snd_soc_dapm_widget widgets[] = {
 137         SND_SOC_DAPM_HP("Headphone", NULL),
 138         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 139
 140         SND_SOC_DAPM_MIC("DMIC", NULL),
 141         SND_SOC_DAPM_MIC("AMIC", NULL),
 142
 143         SND_SOC_DAPM_SPK("Main Speaker", NULL),
 144 };
 145
 146 static struct snd_soc_dapm_route audio_paths[] = {
 147         { "Headphone", NULL, "HPOUTL" },
 148         { "Headphone", NULL, "HPOUTR" },
 149
 150         { "Main Speaker", NULL, "SPKOUTL" },
 151         { "Main Speaker", NULL, "SPKOUTR" },
 152
 153         { "Headset Mic", NULL, "MICBIAS" },
 154         { "IN4L", NULL, "Headset Mic" },
 155         { "IN4R", NULL, "Headset Mic" },
 156
 157         { "AMIC", NULL, "MICBIAS" },
 158         { "IN1L", NULL, "AMIC" },
 159         { "IN1R", NULL, "AMIC" },
 160
 161         { "DMIC", NULL, "MICBIAS" },
 162         { "DMICDAT", NULL, "DMIC" },
 163 };
 164
 165 static struct snd_soc_jack tobermory_headset;
 166
 167 /* Headset jack detection DAPM pins */
 168 static struct snd_soc_jack_pin tobermory_headset_pins[] = {
 169         {
 170                 .pin = "Headset Mic",
 171                 .mask = SND_JACK_MICROPHONE,
 172         },
 173         {
 174                 .pin = "Headphone",
 175                 .mask = SND_JACK_MICROPHONE,
 176         },
 177 };
 178
 179 static int tobermory_late_probe(struct snd_soc_card *card)
 180 {
 181         struct snd_soc_pcm_runtime *rtd;
 182         struct snd_soc_codec *codec;
 183         struct snd_soc_dai *codec_dai;
 184         int ret;
 185
 186         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 187         codec = rtd->codec;
 188         codec_dai = rtd->codec_dai;
 189
 190         ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
 191                                      32768, SND_SOC_CLOCK_IN);
 192         if (ret < 0)
 193                 return ret;
 194
 195         ret = snd_soc_card_jack_new(card, "Headset", SND_JACK_HEADSET |
 196                                     SND_JACK_BTN_0, &tobermory_headset,
 197                                     tobermory_headset_pins,
 198                                     ARRAY_SIZE(tobermory_headset_pins));
 199         if (ret)
 200                 return ret;
 201
 202         wm8962_mic_detect(codec, &tobermory_headset);
 203
 204         return 0;
 205 }
 206
 207 static struct snd_soc_card tobermory = {
 208         .name = "Tobermory",
 209         .owner = THIS_MODULE,
 210         .dai_link = tobermory_dai,
 211         .num_links = ARRAY_SIZE(tobermory_dai),
 212
 213         .set_bias_level = tobermory_set_bias_level,
 214         .set_bias_level_post = tobermory_set_bias_level_post,
 215
 216         .controls = controls,
 217         .num_controls = ARRAY_SIZE(controls),
 218         .dapm_widgets = widgets,
 219         .num_dapm_widgets = ARRAY_SIZE(widgets),
 220         .dapm_routes = audio_paths,
 221         .num_dapm_routes = ARRAY_SIZE(audio_paths),
 222         .fully_routed = true,
 223
 224         .late_probe = tobermory_late_probe,
 225 };
 226
 227 static int tobermory_probe(struct platform_device *pdev)
 228 {
 229         struct snd_soc_card *card = &tobermory;
 230         int ret;
 231
 232         card->dev = &pdev->dev;
 233
 234         ret = devm_snd_soc_register_card(&pdev->dev, card);
 235         if (ret)
 236                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 237                         ret);
 238
 239         return ret;
 240 }
 241
 242 static struct platform_driver tobermory_driver = {
 243         .driver = {
 244                 .name = "tobermory",
 245                 .pm = &snd_soc_pm_ops,
 246         },
 247         .probe = tobermory_probe,
 248 };
 249
 250 module_platform_driver(tobermory_driver);
 251
 252 MODULE_DESCRIPTION("Tobermory audio support");
 253 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 254 MODULE_LICENSE("GPL");
 255 MODULE_ALIAS("platform:tobermory");