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         sample_rate = params_rate(params);
  98
  99         return 0;
 100 }
 101
 102 static struct snd_soc_ops speyside_wm8962_ops = {
 103         .hw_params = speyside_wm8962_hw_params,
 104 };
 105
 106 static struct snd_soc_dai_link speyside_wm8962_dai[] = {
 107         {
 108                 .name = "CPU",
 109                 .stream_name = "CPU",
 110                 .cpu_dai_name = "samsung-i2s.0",
 111                 .codec_dai_name = "wm8962",
 112                 .platform_name = "samsung-audio",
 113                 .codec_name = "wm8962.1-001a",
 114                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 115                                 | SND_SOC_DAIFMT_CBM_CFM,
 116                 .ops = &speyside_wm8962_ops,
 117         },
 118 };
 119
 120 static const struct snd_kcontrol_new controls[] = {
 121         SOC_DAPM_PIN_SWITCH("Main Speaker"),
 122         SOC_DAPM_PIN_SWITCH("DMIC"),
 123 };
 124
 125 static struct snd_soc_dapm_widget widgets[] = {
 126         SND_SOC_DAPM_HP("Headphone", NULL),
 127         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 128
 129         SND_SOC_DAPM_MIC("DMIC", NULL),
 130         SND_SOC_DAPM_MIC("AMIC", NULL),
 131
 132         SND_SOC_DAPM_SPK("Main Speaker", NULL),
 133 };
 134
 135 static struct snd_soc_dapm_route audio_paths[] = {
 136         { "Headphone", NULL, "HPOUTL" },
 137         { "Headphone", NULL, "HPOUTR" },
 138
 139         { "Main Speaker", NULL, "SPKOUTL" },
 140         { "Main Speaker", NULL, "SPKOUTR" },
 141
 142         { "Headset Mic", NULL, "MICBIAS" },
 143         { "IN4L", NULL, "Headset Mic" },
 144         { "IN4R", NULL, "Headset Mic" },
 145
 146         { "AMIC", NULL, "MICBIAS" },
 147         { "IN1L", NULL, "AMIC" },
 148         { "IN1R", NULL, "AMIC" },
 149
 150         { "DMIC", NULL, "MICBIAS" },
 151         { "DMICDAT", NULL, "DMIC" },
 152 };
 153
 154 static struct snd_soc_jack speyside_wm8962_headset;
 155
 156 /* Headset jack detection DAPM pins */
 157 static struct snd_soc_jack_pin speyside_wm8962_headset_pins[] = {
 158         {
 159                 .pin = "Headset Mic",
 160                 .mask = SND_JACK_MICROPHONE,
 161         },
 162         {
 163                 .pin = "Headphone",
 164                 .mask = SND_JACK_MICROPHONE,
 165         },
 166 };
 167
 168 static int speyside_wm8962_late_probe(struct snd_soc_card *card)
 169 {
 170         struct snd_soc_codec *codec = card->rtd[0].codec;
 171         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
 172         int ret;
 173
 174         ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
 175                                      32768, SND_SOC_CLOCK_IN);
 176         if (ret < 0)
 177                 return ret;
 178
 179         ret = snd_soc_jack_new(codec, "Headset",
 180                                SND_JACK_HEADSET | SND_JACK_BTN_0,
 181                                &speyside_wm8962_headset);
 182         if (ret)
 183                 return ret;
 184
 185         ret = snd_soc_jack_add_pins(&speyside_wm8962_headset,
 186                                     ARRAY_SIZE(speyside_wm8962_headset_pins),
 187                                     speyside_wm8962_headset_pins);
 188         if (ret)
 189                 return ret;
 190
 191         wm8962_mic_detect(codec, &speyside_wm8962_headset);
 192
 193         return 0;
 194 }
 195
 196 static struct snd_soc_card speyside_wm8962 = {
 197         .name = "Speyside WM8962",
 198         .dai_link = speyside_wm8962_dai,
 199         .num_links = ARRAY_SIZE(speyside_wm8962_dai),
 200
 201         .set_bias_level = speyside_wm8962_set_bias_level,
 202         .set_bias_level_post = speyside_wm8962_set_bias_level_post,
 203
 204         .controls = controls,
 205         .num_controls = ARRAY_SIZE(controls),
 206         .dapm_widgets = widgets,
 207         .num_dapm_widgets = ARRAY_SIZE(widgets),
 208         .dapm_routes = audio_paths,
 209         .num_dapm_routes = ARRAY_SIZE(audio_paths),
 210
 211         .late_probe = speyside_wm8962_late_probe,
 212 };
 213
 214 static __devinit int speyside_wm8962_probe(struct platform_device *pdev)
 215 {
 216         struct snd_soc_card *card = &speyside_wm8962;
 217         int ret;
 218
 219         card->dev = &pdev->dev;
 220
 221         ret = snd_soc_register_card(card);
 222         if (ret) {
 223                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 224                         ret);
 225                 return ret;
 226         }
 227
 228         return 0;
 229 }
 230
 231 static int __devexit speyside_wm8962_remove(struct platform_device *pdev)
 232 {
 233         struct snd_soc_card *card = platform_get_drvdata(pdev);
 234
 235         snd_soc_unregister_card(card);
 236
 237         return 0;
 238 }
 239
 240 static struct platform_driver speyside_wm8962_driver = {
 241         .driver = {
 242                 .name = "speyside-wm8962",
 243                 .owner = THIS_MODULE,
 244                 .pm = &snd_soc_pm_ops,
 245         },
 246         .probe = speyside_wm8962_probe,
 247         .remove = __devexit_p(speyside_wm8962_remove),
 248 };
 249
 250 static int __init speyside_wm8962_audio_init(void)
 251 {
 252         return platform_driver_register(&speyside_wm8962_driver);
 253 }
 254 module_init(speyside_wm8962_audio_init);
 255
 256 static void __exit speyside_wm8962_audio_exit(void)
 257 {
 258         platform_driver_unregister(&speyside_wm8962_driver);
 259 }
 260 module_exit(speyside_wm8962_audio_exit);
 261
 262 MODULE_DESCRIPTION("Speyside WM8962 audio support");
 263 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 264 MODULE_LICENSE("GPL");
 265 MODULE_ALIAS("platform:speyside-wm8962");