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