kernel/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 *aif1_dai = card->rtd[0].codec_dai;
  27         int ret;
  28
  29         if (dapm->dev != aif1_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(aif1_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(aif1_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 *aif1_dai = card->rtd[0].codec_dai;
  70         int ret;
  71
  72         if (dapm->dev != aif1_dai->dev)
  73                 return 0;
  74
  75         switch (level) {
  76         case SND_SOC_BIAS_STANDBY:
  77                 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
  78                                              32768, SND_SOC_CLOCK_IN);
  79                 if (ret < 0) {
  80                         pr_err("Failed to switch away from FLL1: %d\n", ret);
  81                         return ret;
  82                 }
  83
  84                 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
  85                                           0, 0, 0);
  86                 if (ret < 0) {
  87                         pr_err("Failed to stop FLL1: %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 const struct snd_soc_pcm_stream baseband_params = {
 135         .formats = SNDRV_PCM_FMTBIT_S32_LE,
 136         .rate_min = 8000,
 137         .rate_max = 8000,
 138         .channels_min = 2,
 139         .channels_max = 2,
 140 };
 141
 142 static struct snd_soc_dai_link littlemill_dai[] = {
 143         {
 144                 .name = "CPU",
 145                 .stream_name = "CPU",
 146                 .cpu_dai_name = "samsung-i2s.0",
 147                 .codec_dai_name = "wm8994-aif1",
 148                 .platform_name = "samsung-i2s.0",
 149                 .codec_name = "wm8994-codec",
 150                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 151                                 | SND_SOC_DAIFMT_CBM_CFM,
 152                 .ops = &littlemill_ops,
 153         },
 154         {
 155                 .name = "Baseband",
 156                 .stream_name = "Baseband",
 157                 .cpu_dai_name = "wm8994-aif2",
 158                 .codec_dai_name = "wm1250-ev1",
 159                 .codec_name = "wm1250-ev1.1-0027",
 160                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 161                                 | SND_SOC_DAIFMT_CBM_CFM,
 162                 .ignore_suspend = 1,
 163                 .params = &baseband_params,
 164         },
 165 };
 166
 167 static int bbclk_ev(struct snd_soc_dapm_widget *w,
 168                     struct snd_kcontrol *kcontrol, int event)
 169 {
 170         struct snd_soc_card *card = w->dapm->card;
 171         struct snd_soc_dai *aif2_dai = card->rtd[1].cpu_dai;
 172         int ret;
 173
 174         switch (event) {
 175         case SND_SOC_DAPM_PRE_PMU:
 176                 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
 177                                           WM8994_FLL_SRC_BCLK, 64 * 8000,
 178                                           8000 * 256);
 179                 if (ret < 0) {
 180                         pr_err("Failed to start FLL: %d\n", ret);
 181                         return ret;
 182                 }
 183
 184                 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
 185                                              8000 * 256,
 186                                              SND_SOC_CLOCK_IN);
 187                 if (ret < 0) {
 188                         pr_err("Failed to set SYSCLK: %d\n", ret);
 189                         return ret;
 190                 }
 191                 break;
 192         case SND_SOC_DAPM_POST_PMD:
 193                 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
 194                                              32768, SND_SOC_CLOCK_IN);
 195                 if (ret < 0) {
 196                         pr_err("Failed to switch away from FLL2: %d\n", ret);
 197                         return ret;
 198                 }
 199
 200                 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
 201                                           0, 0, 0);
 202                 if (ret < 0) {
 203                         pr_err("Failed to stop FLL2: %d\n", ret);
 204                         return ret;
 205                 }
 206                 break;
 207         default:
 208                 return -EINVAL;
 209         }
 210
 211         return 0;
 212 }
 213
 214 static const struct snd_kcontrol_new controls[] = {
 215         SOC_DAPM_PIN_SWITCH("WM1250 Input"),
 216         SOC_DAPM_PIN_SWITCH("WM1250 Output"),
 217 };
 218
 219 static struct snd_soc_dapm_widget widgets[] = {
 220         SND_SOC_DAPM_HP("Headphone", NULL),
 221
 222         SND_SOC_DAPM_MIC("AMIC", NULL),
 223         SND_SOC_DAPM_MIC("DMIC", NULL),
 224
 225         SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
 226                               bbclk_ev,
 227                               SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 228 };
 229
 230 static struct snd_soc_dapm_route audio_paths[] = {
 231         { "Headphone", NULL, "HPOUT1L" },
 232         { "Headphone", NULL, "HPOUT1R" },
 233
 234         { "AMIC", NULL, "MICBIAS1" },   /* Default for AMICBIAS jumper */
 235         { "IN1LN", NULL, "AMIC" },
 236
 237         { "DMIC", NULL, "MICBIAS2" },   /* Default for DMICBIAS jumper */
 238         { "DMIC1DAT", NULL, "DMIC" },
 239         { "DMIC2DAT", NULL, "DMIC" },
 240
 241         { "AIF2CLK", NULL, "Baseband Clock" },
 242 };
 243
 244 static struct snd_soc_jack littlemill_headset;
 245
 246 static int littlemill_late_probe(struct snd_soc_card *card)
 247 {
 248         struct snd_soc_codec *codec = card->rtd[0].codec;
 249         struct snd_soc_dai *aif1_dai = card->rtd[0].codec_dai;
 250         struct snd_soc_dai *aif2_dai = card->rtd[1].cpu_dai;
 251         int ret;
 252
 253         ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
 254                                      32768, SND_SOC_CLOCK_IN);
 255         if (ret < 0)
 256                 return ret;
 257
 258         ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
 259                                      32768, SND_SOC_CLOCK_IN);
 260         if (ret < 0)
 261                 return ret;
 262
 263         ret = snd_soc_card_jack_new(card, "Headset",
 264                                     SND_JACK_HEADSET | SND_JACK_MECHANICAL |
 265                                     SND_JACK_BTN_0 | SND_JACK_BTN_1 |
 266                                     SND_JACK_BTN_2 | SND_JACK_BTN_3 |
 267                                     SND_JACK_BTN_4 | SND_JACK_BTN_5,
 268                                     &littlemill_headset, NULL, 0);
 269         if (ret)
 270                 return ret;
 271
 272         /* This will check device compatibility itself */
 273         wm8958_mic_detect(codec, &littlemill_headset, NULL, NULL, NULL, NULL);
 274
 275         /* As will this */
 276         wm8994_mic_detect(codec, &littlemill_headset, 1);
 277
 278         return 0;
 279 }
 280
 281 static struct snd_soc_card littlemill = {
 282         .name = "Littlemill",
 283         .owner = THIS_MODULE,
 284         .dai_link = littlemill_dai,
 285         .num_links = ARRAY_SIZE(littlemill_dai),
 286
 287         .set_bias_level = littlemill_set_bias_level,
 288         .set_bias_level_post = littlemill_set_bias_level_post,
 289
 290         .controls = controls,
 291         .num_controls = ARRAY_SIZE(controls),
 292         .dapm_widgets = widgets,
 293         .num_dapm_widgets = ARRAY_SIZE(widgets),
 294         .dapm_routes = audio_paths,
 295         .num_dapm_routes = ARRAY_SIZE(audio_paths),
 296
 297         .late_probe = littlemill_late_probe,
 298 };
 299
 300 static int littlemill_probe(struct platform_device *pdev)
 301 {
 302         struct snd_soc_card *card = &littlemill;
 303         int ret;
 304
 305         card->dev = &pdev->dev;
 306
 307         ret = devm_snd_soc_register_card(&pdev->dev, card);
 308         if (ret)
 309                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 310                         ret);
 311
 312         return ret;
 313 }
 314
 315 static struct platform_driver littlemill_driver = {
 316         .driver = {
 317                 .name = "littlemill",
 318                 .pm = &snd_soc_pm_ops,
 319         },
 320         .probe = littlemill_probe,
 321 };
 322
 323 module_platform_driver(littlemill_driver);
 324
 325 MODULE_DESCRIPTION("Littlemill audio support");
 326 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 327 MODULE_LICENSE("GPL");
 328 MODULE_ALIAS("platform:littlemill");