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_pcm_runtime *rtd;
  27         struct snd_soc_dai *aif1_dai;
  28         int ret;
  29
  30         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
  31         aif1_dai = rtd->codec_dai;
  32
  33         if (dapm->dev != aif1_dai->dev)
  34                 return 0;
  35
  36         switch (level) {
  37         case SND_SOC_BIAS_PREPARE:
  38                 /*
  39                  * If we've not already clocked things via hw_params()
  40                  * then do so now, otherwise these are noops.
  41                  */
  42                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
  43                         ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
  44                                                   WM8994_FLL_SRC_MCLK2, 32768,
  45                                                   sample_rate * 512);
  46                         if (ret < 0) {
  47                                 pr_err("Failed to start FLL: %d\n", ret);
  48                                 return ret;
  49                         }
  50
  51                         ret = snd_soc_dai_set_sysclk(aif1_dai,
  52                                                      WM8994_SYSCLK_FLL1,
  53                                                      sample_rate * 512,
  54                                                      SND_SOC_CLOCK_IN);
  55                         if (ret < 0) {
  56                                 pr_err("Failed to set SYSCLK: %d\n", ret);
  57                                 return ret;
  58                         }
  59                 }
  60                 break;
  61
  62         default:
  63                 break;
  64         }
  65
  66         return 0;
  67 }
  68
  69 static int littlemill_set_bias_level_post(struct snd_soc_card *card,
  70                                                struct snd_soc_dapm_context *dapm,
  71                                                enum snd_soc_bias_level level)
  72 {
  73         struct snd_soc_pcm_runtime *rtd;
  74         struct snd_soc_dai *aif1_dai;
  75         int ret;
  76
  77         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
  78         aif1_dai = rtd->codec_dai;
  79
  80         if (dapm->dev != aif1_dai->dev)
  81                 return 0;
  82
  83         switch (level) {
  84         case SND_SOC_BIAS_STANDBY:
  85                 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
  86                                              32768, SND_SOC_CLOCK_IN);
  87                 if (ret < 0) {
  88                         pr_err("Failed to switch away from FLL1: %d\n", ret);
  89                         return ret;
  90                 }
  91
  92                 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
  93                                           0, 0, 0);
  94                 if (ret < 0) {
  95                         pr_err("Failed to stop FLL1: %d\n", ret);
  96                         return ret;
  97                 }
  98                 break;
  99
 100         default:
 101                 break;
 102         }
 103
 104         dapm->bias_level = level;
 105
 106         return 0;
 107 }
 108
 109 static int littlemill_hw_params(struct snd_pcm_substream *substream,
 110                                 struct snd_pcm_hw_params *params)
 111 {
 112         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 113         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 114         int ret;
 115
 116         sample_rate = params_rate(params);
 117
 118         ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
 119                                   WM8994_FLL_SRC_MCLK2, 32768,
 120                                   sample_rate * 512);
 121         if (ret < 0) {
 122                 pr_err("Failed to start FLL: %d\n", ret);
 123                 return ret;
 124         }
 125
 126         ret = snd_soc_dai_set_sysclk(codec_dai,
 127                                      WM8994_SYSCLK_FLL1,
 128                                      sample_rate * 512,
 129                                      SND_SOC_CLOCK_IN);
 130         if (ret < 0) {
 131                 pr_err("Failed to set SYSCLK: %d\n", ret);
 132                 return ret;
 133         }
 134
 135         return 0;
 136 }
 137
 138 static struct snd_soc_ops littlemill_ops = {
 139         .hw_params = littlemill_hw_params,
 140 };
 141
 142 static const struct snd_soc_pcm_stream baseband_params = {
 143         .formats = SNDRV_PCM_FMTBIT_S32_LE,
 144         .rate_min = 8000,
 145         .rate_max = 8000,
 146         .channels_min = 2,
 147         .channels_max = 2,
 148 };
 149
 150 static struct snd_soc_dai_link littlemill_dai[] = {
 151         {
 152                 .name = "CPU",
 153                 .stream_name = "CPU",
 154                 .cpu_dai_name = "samsung-i2s.0",
 155                 .codec_dai_name = "wm8994-aif1",
 156                 .platform_name = "samsung-i2s.0",
 157                 .codec_name = "wm8994-codec",
 158                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 159                                 | SND_SOC_DAIFMT_CBM_CFM,
 160                 .ops = &littlemill_ops,
 161         },
 162         {
 163                 .name = "Baseband",
 164                 .stream_name = "Baseband",
 165                 .cpu_dai_name = "wm8994-aif2",
 166                 .codec_dai_name = "wm1250-ev1",
 167                 .codec_name = "wm1250-ev1.1-0027",
 168                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 169                                 | SND_SOC_DAIFMT_CBM_CFM,
 170                 .ignore_suspend = 1,
 171                 .params = &baseband_params,
 172         },
 173 };
 174
 175 static int bbclk_ev(struct snd_soc_dapm_widget *w,
 176                     struct snd_kcontrol *kcontrol, int event)
 177 {
 178         struct snd_soc_card *card = w->dapm->card;
 179         struct snd_soc_pcm_runtime *rtd;
 180         struct snd_soc_dai *aif2_dai;
 181         int ret;
 182
 183         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
 184         aif2_dai = rtd->cpu_dai;
 185
 186         switch (event) {
 187         case SND_SOC_DAPM_PRE_PMU:
 188                 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
 189                                           WM8994_FLL_SRC_BCLK, 64 * 8000,
 190                                           8000 * 256);
 191                 if (ret < 0) {
 192                         pr_err("Failed to start FLL: %d\n", ret);
 193                         return ret;
 194                 }
 195
 196                 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
 197                                              8000 * 256,
 198                                              SND_SOC_CLOCK_IN);
 199                 if (ret < 0) {
 200                         pr_err("Failed to set SYSCLK: %d\n", ret);
 201                         return ret;
 202                 }
 203                 break;
 204         case SND_SOC_DAPM_POST_PMD:
 205                 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
 206                                              32768, SND_SOC_CLOCK_IN);
 207                 if (ret < 0) {
 208                         pr_err("Failed to switch away from FLL2: %d\n", ret);
 209                         return ret;
 210                 }
 211
 212                 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
 213                                           0, 0, 0);
 214                 if (ret < 0) {
 215                         pr_err("Failed to stop FLL2: %d\n", ret);
 216                         return ret;
 217                 }
 218                 break;
 219         default:
 220                 return -EINVAL;
 221         }
 222
 223         return 0;
 224 }
 225
 226 static const struct snd_kcontrol_new controls[] = {
 227         SOC_DAPM_PIN_SWITCH("WM1250 Input"),
 228         SOC_DAPM_PIN_SWITCH("WM1250 Output"),
 229 };
 230
 231 static struct snd_soc_dapm_widget widgets[] = {
 232         SND_SOC_DAPM_HP("Headphone", NULL),
 233
 234         SND_SOC_DAPM_MIC("AMIC", NULL),
 235         SND_SOC_DAPM_MIC("DMIC", NULL),
 236
 237         SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
 238                               bbclk_ev,
 239                               SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 240 };
 241
 242 static struct snd_soc_dapm_route audio_paths[] = {
 243         { "Headphone", NULL, "HPOUT1L" },
 244         { "Headphone", NULL, "HPOUT1R" },
 245
 246         { "AMIC", NULL, "MICBIAS1" },   /* Default for AMICBIAS jumper */
 247         { "IN1LN", NULL, "AMIC" },
 248
 249         { "DMIC", NULL, "MICBIAS2" },   /* Default for DMICBIAS jumper */
 250         { "DMIC1DAT", NULL, "DMIC" },
 251         { "DMIC2DAT", NULL, "DMIC" },
 252
 253         { "AIF2CLK", NULL, "Baseband Clock" },
 254 };
 255
 256 static struct snd_soc_jack littlemill_headset;
 257
 258 static int littlemill_late_probe(struct snd_soc_card *card)
 259 {
 260         struct snd_soc_pcm_runtime *rtd;
 261         struct snd_soc_codec *codec;
 262         struct snd_soc_dai *aif1_dai;
 263         struct snd_soc_dai *aif2_dai;
 264         int ret;
 265
 266         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 267         codec = rtd->codec;
 268         aif1_dai = rtd->codec_dai;
 269
 270         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
 271         aif2_dai = rtd->cpu_dai;
 272
 273         ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
 274                                      32768, SND_SOC_CLOCK_IN);
 275         if (ret < 0)
 276                 return ret;
 277
 278         ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
 279                                      32768, SND_SOC_CLOCK_IN);
 280         if (ret < 0)
 281                 return ret;
 282
 283         ret = snd_soc_card_jack_new(card, "Headset",
 284                                     SND_JACK_HEADSET | SND_JACK_MECHANICAL |
 285                                     SND_JACK_BTN_0 | SND_JACK_BTN_1 |
 286                                     SND_JACK_BTN_2 | SND_JACK_BTN_3 |
 287                                     SND_JACK_BTN_4 | SND_JACK_BTN_5,
 288                                     &littlemill_headset, NULL, 0);
 289         if (ret)
 290                 return ret;
 291
 292         /* This will check device compatibility itself */
 293         wm8958_mic_detect(codec, &littlemill_headset, NULL, NULL, NULL, NULL);
 294
 295         /* As will this */
 296         wm8994_mic_detect(codec, &littlemill_headset, 1);
 297
 298         return 0;
 299 }
 300
 301 static struct snd_soc_card littlemill = {
 302         .name = "Littlemill",
 303         .owner = THIS_MODULE,
 304         .dai_link = littlemill_dai,
 305         .num_links = ARRAY_SIZE(littlemill_dai),
 306
 307         .set_bias_level = littlemill_set_bias_level,
 308         .set_bias_level_post = littlemill_set_bias_level_post,
 309
 310         .controls = controls,
 311         .num_controls = ARRAY_SIZE(controls),
 312         .dapm_widgets = widgets,
 313         .num_dapm_widgets = ARRAY_SIZE(widgets),
 314         .dapm_routes = audio_paths,
 315         .num_dapm_routes = ARRAY_SIZE(audio_paths),
 316
 317         .late_probe = littlemill_late_probe,
 318 };
 319
 320 static int littlemill_probe(struct platform_device *pdev)
 321 {
 322         struct snd_soc_card *card = &littlemill;
 323         int ret;
 324
 325         card->dev = &pdev->dev;
 326
 327         ret = devm_snd_soc_register_card(&pdev->dev, card);
 328         if (ret)
 329                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 330                         ret);
 331
 332         return ret;
 333 }
 334
 335 static struct platform_driver littlemill_driver = {
 336         .driver = {
 337                 .name = "littlemill",
 338                 .pm = &snd_soc_pm_ops,
 339         },
 340         .probe = littlemill_probe,
 341 };
 342
 343 module_platform_driver(littlemill_driver);
 344
 345 MODULE_DESCRIPTION("Littlemill audio support");
 346 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 347 MODULE_LICENSE("GPL");
 348 MODULE_ALIAS("platform:littlemill");