sound/soc/samsung/speyside_wm8962.c

   1 /*
   2  * Speyside with WM8962 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
  17 #include "../codecs/wm8962.h"
  18
  19 static int sample_rate = 44100;
  20
  21 static int speyside_wm8962_set_bias_level(struct snd_soc_card *card,
  22                                           struct snd_soc_dapm_context *dapm,
  23                                           enum snd_soc_bias_level level)
  24 {
  25         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
  26         int ret;
  27
  28         if (dapm->dev != codec_dai->dev)
  29                 return 0;
  30
  31         switch (level) {
  32         case SND_SOC_BIAS_PREPARE:
  33                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
  34                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  35                                                   WM8962_FLL_MCLK, 32768,
  36                                                   sample_rate * 512);
  37                         if (ret < 0)
  38                                 pr_err("Failed to start FLL: %d\n", ret);
  39
  40                         ret = snd_soc_dai_set_sysclk(codec_dai,
  41                                                      WM8962_SYSCLK_FLL,
  42                                                      sample_rate * 512,
  43                                                      SND_SOC_CLOCK_IN);
  44                         if (ret < 0) {
  45                                 pr_err("Failed to set SYSCLK: %d\n", ret);
  46                                 return ret;
  47                         }
  48                 }
  49                 break;
  50
  51         default:
  52                 break;
  53         }
  54
  55         return 0;
  56 }
  57
  58 static int speyside_wm8962_set_bias_level_post(struct snd_soc_card *card,
  59                                                struct snd_soc_dapm_context *dapm,
  60                                                enum snd_soc_bias_level level)
  61 {
  62         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
  63         int ret;
  64
  65         if (dapm->dev != codec_dai->dev)
  66                 return 0;
  67
  68         switch (level) {
  69         case SND_SOC_BIAS_STANDBY:
  70                 ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
  71                                              32768, SND_SOC_CLOCK_IN);
  72                 if (ret < 0) {
  73                         pr_err("Failed to switch away from FLL: %d\n", ret);
  74                         return ret;
  75                 }
  76
  77                 ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  78                                           0, 0, 0);
  79                 if (ret < 0) {
  80                         pr_err("Failed to stop FLL: %d\n", ret);
  81                         return ret;
  82                 }
  83                 break;
  84
  85         default:
  86                 break;
  87         }
  88
  89         dapm->bias_level = level;
  90
  91         return 0;
  92 }
  93
  94 static int speyside_wm8962_hw_params(struct snd_pcm_substream *substream,
  95                               struct snd_pcm_hw_params *params)
  96 {
  97         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  98         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  99         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 100         int ret;
 101
 102         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
 103                                          | SND_SOC_DAIFMT_NB_NF
 104                                          | SND_SOC_DAIFMT_CBM_CFM);
 105         if (ret < 0)
 106                 return ret;
 107
 108         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
 109                                          | SND_SOC_DAIFMT_NB_NF
 110                                          | SND_SOC_DAIFMT_CBM_CFM);
 111         if (ret < 0)
 112                 return ret;
 113
 114         sample_rate = params_rate(params);
 115
 116         return 0;
 117 }
 118
 119 static struct snd_soc_ops speyside_wm8962_ops = {
 120         .hw_params = speyside_wm8962_hw_params,
 121 };
 122
 123 static struct snd_soc_dai_link speyside_wm8962_dai[] = {
 124         {
 125                 .name = "CPU",
 126                 .stream_name = "CPU",
 127                 .cpu_dai_name = "samsung-i2s.0",
 128                 .codec_dai_name = "wm8962",
 129                 .platform_name = "samsung-audio",
 130                 .codec_name = "wm8962.1-001a",
 131                 .ops = &speyside_wm8962_ops,
 132         },
 133 };
 134
 135 static const struct snd_kcontrol_new controls[] = {
 136         SOC_DAPM_PIN_SWITCH("Main Speaker"),
 137 };
 138
 139 static struct snd_soc_dapm_widget widgets[] = {
 140         SND_SOC_DAPM_HP("Headphone", NULL),
 141         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 142
 143         SND_SOC_DAPM_MIC("DMIC", NULL),
 144
 145         SND_SOC_DAPM_SPK("Main Speaker", NULL),
 146 };
 147
 148 static struct snd_soc_dapm_route audio_paths[] = {
 149         { "Headphone", NULL, "HPOUTL" },
 150         { "Headphone", NULL, "HPOUTR" },
 151
 152         { "Main Speaker", NULL, "SPKOUTL" },
 153         { "Main Speaker", NULL, "SPKOUTR" },
 154
 155         { "Headset Mic", NULL, "MICBIAS" },
 156         { "IN4L", NULL, "Headset Mic" },
 157         { "IN4R", NULL, "Headset Mic" },
 158
 159         { "DMIC", NULL, "MICBIAS" },
 160         { "DMICDAT", NULL, "DMIC" },
 161 };
 162
 163 static struct snd_soc_jack speyside_wm8962_headset;
 164
 165 /* Headset jack detection DAPM pins */
 166 static struct snd_soc_jack_pin speyside_wm8962_headset_pins[] = {
 167         {
 168                 .pin = "Headset Mic",
 169                 .mask = SND_JACK_MICROPHONE,
 170         },
 171         {
 172                 .pin = "Headphone",
 173                 .mask = SND_JACK_MICROPHONE,
 174         },
 175 };
 176
 177 static int speyside_wm8962_late_probe(struct snd_soc_card *card)
 178 {
 179         struct snd_soc_codec *codec = card->rtd[0].codec;
 180         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
 181         int ret;
 182
 183         ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
 184                                      32768, SND_SOC_CLOCK_IN);
 185         if (ret < 0)
 186                 return ret;
 187
 188         ret = snd_soc_jack_new(codec, "Headset",
 189                                SND_JACK_HEADSET | SND_JACK_BTN_0,
 190                                &speyside_wm8962_headset);
 191         if (ret)
 192                 return ret;
 193
 194         ret = snd_soc_jack_add_pins(&speyside_wm8962_headset,
 195                                     ARRAY_SIZE(speyside_wm8962_headset_pins),
 196                                     speyside_wm8962_headset_pins);
 197         if (ret)
 198                 return ret;
 199
 200         wm8962_mic_detect(codec, &speyside_wm8962_headset);
 201
 202         return 0;
 203 }
 204
 205 static struct snd_soc_card speyside_wm8962 = {
 206         .name = "Speyside WM8962",
 207         .dai_link = speyside_wm8962_dai,
 208         .num_links = ARRAY_SIZE(speyside_wm8962_dai),
 209
 210         .set_bias_level = speyside_wm8962_set_bias_level,
 211         .set_bias_level_post = speyside_wm8962_set_bias_level_post,
 212
 213         .controls = controls,
 214         .num_controls = ARRAY_SIZE(controls),
 215         .dapm_widgets = widgets,
 216         .num_dapm_widgets = ARRAY_SIZE(widgets),
 217         .dapm_routes = audio_paths,
 218         .num_dapm_routes = ARRAY_SIZE(audio_paths),
 219
 220         .late_probe = speyside_wm8962_late_probe,
 221 };
 222
 223 static __devinit int speyside_wm8962_probe(struct platform_device *pdev)
 224 {
 225         struct snd_soc_card *card = &speyside_wm8962;
 226         int ret;
 227
 228         card->dev = &pdev->dev;
 229
 230         ret = snd_soc_register_card(card);
 231         if (ret) {
 232                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 233                         ret);
 234                 return ret;
 235         }
 236
 237         return 0;
 238 }
 239
 240 static int __devexit speyside_wm8962_remove(struct platform_device *pdev)
 241 {
 242         struct snd_soc_card *card = platform_get_drvdata(pdev);
 243
 244         snd_soc_unregister_card(card);
 245
 246         return 0;
 247 }
 248
 249 static struct platform_driver speyside_wm8962_driver = {
 250         .driver = {
 251                 .name = "speyside-wm8962",
 252                 .owner = THIS_MODULE,
 253                 .pm = &snd_soc_pm_ops,
 254         },
 255         .probe = speyside_wm8962_probe,
 256         .remove = __devexit_p(speyside_wm8962_remove),
 257 };
 258
 259 static int __init speyside_wm8962_audio_init(void)
 260 {
 261         return platform_driver_register(&speyside_wm8962_driver);
 262 }
 263 module_init(speyside_wm8962_audio_init);
 264
 265 static void __exit speyside_wm8962_audio_exit(void)
 266 {
 267         platform_driver_unregister(&speyside_wm8962_driver);
 268 }
 269 module_exit(speyside_wm8962_audio_exit);
 270
 271 MODULE_DESCRIPTION("Speyside WM8962 audio support");
 272 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 273 MODULE_LICENSE("GPL");
 274 MODULE_ALIAS("platform:speyside-wm8962");