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