sound/soc/samsung/littlemill.c

   1 /*
   2  * Littlemill 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/wm8994.h"
  19
  20 static int sample_rate = 44100;
  21
  22 static int littlemill_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                 /*
  35                  * If we've not already clocked things via hw_params()
  36                  * then do so now, otherwise these are noops.
  37                  */
  38                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
  39                         ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
  40                                                   WM8994_FLL_SRC_MCLK2, 32768,
  41                                                   sample_rate * 512);
  42                         if (ret < 0) {
  43                                 pr_err("Failed to start FLL: %d\n", ret);
  44                                 return ret;
  45                         }
  46
  47                         ret = snd_soc_dai_set_sysclk(codec_dai,
  48                                                      WM8994_SYSCLK_FLL1,
  49                                                      sample_rate * 512,
  50                                                      SND_SOC_CLOCK_IN);
  51                         if (ret < 0) {
  52                                 pr_err("Failed to set SYSCLK: %d\n", ret);
  53                                 return ret;
  54                         }
  55                 }
  56                 break;
  57
  58         default:
  59                 break;
  60         }
  61
  62         return 0;
  63 }
  64
  65 static int littlemill_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_dai *codec_dai = card->rtd[0].codec_dai;
  70         int ret;
  71
  72         if (dapm->dev != codec_dai->dev)
  73                 return 0;
  74
  75         switch (level) {
  76         case SND_SOC_BIAS_STANDBY:
  77                 ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK2,
  78                                              32768, SND_SOC_CLOCK_IN);
  79                 if (ret < 0) {
  80                         pr_err("Failed to switch away from FLL: %d\n", ret);
  81                         return ret;
  82                 }
  83
  84                 ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
  85                                           0, 0, 0);
  86                 if (ret < 0) {
  87                         pr_err("Failed to stop FLL: %d\n", ret);
  88                         return ret;
  89                 }
  90                 break;
  91
  92         default:
  93                 break;
  94         }
  95
  96         dapm->bias_level = level;
  97
  98         return 0;
  99 }
 100
 101 static int littlemill_hw_params(struct snd_pcm_substream *substream,
 102                                 struct snd_pcm_hw_params *params)
 103 {
 104         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 105         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 106         int ret;
 107
 108         sample_rate = params_rate(params);
 109
 110         ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
 111                                   WM8994_FLL_SRC_MCLK2, 32768,
 112                                   sample_rate * 512);
 113         if (ret < 0) {
 114                 pr_err("Failed to start FLL: %d\n", ret);
 115                 return ret;
 116         }
 117
 118         ret = snd_soc_dai_set_sysclk(codec_dai,
 119                                      WM8994_SYSCLK_FLL1,
 120                                      sample_rate * 512,
 121                                      SND_SOC_CLOCK_IN);
 122         if (ret < 0) {
 123                 pr_err("Failed to set SYSCLK: %d\n", ret);
 124                 return ret;
 125         }
 126
 127         return 0;
 128 }
 129
 130 static struct snd_soc_ops littlemill_ops = {
 131         .hw_params = littlemill_hw_params,
 132 };
 133
 134 static struct snd_soc_dai_link littlemill_dai[] = {
 135         {
 136                 .name = "CPU",
 137                 .stream_name = "CPU",
 138                 .cpu_dai_name = "samsung-i2s.0",
 139                 .codec_dai_name = "wm8994-aif1",
 140                 .platform_name = "samsung-audio",
 141                 .codec_name = "wm8994-codec",
 142                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 143                                 | SND_SOC_DAIFMT_CBM_CFM,
 144                 .ops = &littlemill_ops,
 145         },
 146 };
 147
 148 static struct snd_soc_dapm_widget widgets[] = {
 149         SND_SOC_DAPM_HP("Headphone", NULL),
 150
 151         SND_SOC_DAPM_MIC("AMIC", NULL),
 152         SND_SOC_DAPM_MIC("DMIC", NULL),
 153 };
 154
 155 static struct snd_soc_dapm_route audio_paths[] = {
 156         { "Headphone", NULL, "HPOUT1L" },
 157         { "Headphone", NULL, "HPOUT1R" },
 158
 159         { "AMIC", NULL, "MICBIAS1" },   /* Default for AMICBIAS jumper */
 160         { "IN1LN", NULL, "AMIC" },
 161
 162         { "DMIC", NULL, "MICBIAS2" },   /* Default for DMICBIAS jumper */
 163         { "DMIC1DAT", NULL, "DMIC" },
 164         { "DMIC2DAT", NULL, "DMIC" },
 165 };
 166
 167 static struct snd_soc_jack littlemill_headset;
 168
 169 static int littlemill_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, WM8994_SYSCLK_MCLK2,
 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_MECHANICAL |
 182                                SND_JACK_BTN_0 | SND_JACK_BTN_1 |
 183                                SND_JACK_BTN_2 | SND_JACK_BTN_3 |
 184                                SND_JACK_BTN_4 | SND_JACK_BTN_5,
 185                                &littlemill_headset);
 186         if (ret)
 187                 return ret;
 188
 189         /* This will check device compatibility itself */
 190         wm8958_mic_detect(codec, &littlemill_headset, NULL, NULL);
 191
 192         return 0;
 193 }
 194
 195 static struct snd_soc_card littlemill = {
 196         .name = "Littlemill",
 197         .owner = THIS_MODULE,
 198         .dai_link = littlemill_dai,
 199         .num_links = ARRAY_SIZE(littlemill_dai),
 200
 201         .set_bias_level = littlemill_set_bias_level,
 202         .set_bias_level_post = littlemill_set_bias_level_post,
 203
 204         .dapm_widgets = widgets,
 205         .num_dapm_widgets = ARRAY_SIZE(widgets),
 206         .dapm_routes = audio_paths,
 207         .num_dapm_routes = ARRAY_SIZE(audio_paths),
 208
 209         .late_probe = littlemill_late_probe,
 210 };
 211
 212 static __devinit int littlemill_probe(struct platform_device *pdev)
 213 {
 214         struct snd_soc_card *card = &littlemill;
 215         int ret;
 216
 217         card->dev = &pdev->dev;
 218
 219         ret = snd_soc_register_card(card);
 220         if (ret) {
 221                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 222                         ret);
 223                 return ret;
 224         }
 225
 226         return 0;
 227 }
 228
 229 static int __devexit littlemill_remove(struct platform_device *pdev)
 230 {
 231         struct snd_soc_card *card = platform_get_drvdata(pdev);
 232
 233         snd_soc_unregister_card(card);
 234
 235         return 0;
 236 }
 237
 238 static struct platform_driver littlemill_driver = {
 239         .driver = {
 240                 .name = "littlemill",
 241                 .owner = THIS_MODULE,
 242                 .pm = &snd_soc_pm_ops,
 243         },
 244         .probe = littlemill_probe,
 245         .remove = __devexit_p(littlemill_remove),
 246 };
 247
 248 module_platform_driver(littlemill_driver);
 249
 250 MODULE_DESCRIPTION("Littlemill audio support");
 251 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 252 MODULE_LICENSE("GPL");
 253 MODULE_ALIAS("platform:littlemill");