linux/sound/soc/samsung/littlemill.c
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   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
  20static int sample_rate = 44100;
  21
  22static 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
  65static 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
 101static 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
 130static struct snd_soc_ops littlemill_ops = {
 131        .hw_params = littlemill_hw_params,
 132};
 133
 134static 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
 142static 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
 167static 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
 214static const struct snd_kcontrol_new controls[] = {
 215        SOC_DAPM_PIN_SWITCH("WM1250 Input"),
 216        SOC_DAPM_PIN_SWITCH("WM1250 Output"),
 217};
 218
 219static 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
 230static 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
 244static struct snd_soc_jack littlemill_headset;
 245
 246static 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
 281static 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
 300static 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
 315static struct platform_driver littlemill_driver = {
 316        .driver = {
 317                .name = "littlemill",
 318                .pm = &snd_soc_pm_ops,
 319        },
 320        .probe = littlemill_probe,
 321};
 322
 323module_platform_driver(littlemill_driver);
 324
 325MODULE_DESCRIPTION("Littlemill audio support");
 326MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 327MODULE_LICENSE("GPL");
 328MODULE_ALIAS("platform:littlemill");
 329