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_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
  69static 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
 109static 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
 138static struct snd_soc_ops littlemill_ops = {
 139        .hw_params = littlemill_hw_params,
 140};
 141
 142static 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
 150static 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
 175static 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
 226static const struct snd_kcontrol_new controls[] = {
 227        SOC_DAPM_PIN_SWITCH("WM1250 Input"),
 228        SOC_DAPM_PIN_SWITCH("WM1250 Output"),
 229};
 230
 231static 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
 242static 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
 256static struct snd_soc_jack littlemill_headset;
 257
 258static int littlemill_late_probe(struct snd_soc_card *card)
 259{
 260        struct snd_soc_pcm_runtime *rtd;
 261        struct snd_soc_component *component;
 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        component = rtd->codec_dai->component;
 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(component, &littlemill_headset, NULL, NULL, NULL, NULL);
 294
 295        /* As will this */
 296        wm8994_mic_detect(component, &littlemill_headset, 1);
 297
 298        return 0;
 299}
 300
 301static 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
 320static 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
 335static struct platform_driver littlemill_driver = {
 336        .driver = {
 337                .name = "littlemill",
 338                .pm = &snd_soc_pm_ops,
 339        },
 340        .probe = littlemill_probe,
 341};
 342
 343module_platform_driver(littlemill_driver);
 344
 345MODULE_DESCRIPTION("Littlemill audio support");
 346MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 347MODULE_LICENSE("GPL");
 348MODULE_ALIAS("platform:littlemill");
 349