linux/sound/soc/samsung/tobermory.c
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   1/*
   2 * Tobermory 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/wm8962.h"
  19
  20static int sample_rate = 44100;
  21
  22static int tobermory_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 *codec_dai;
  28        int ret;
  29
  30        rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
  31        codec_dai = rtd->codec_dai;
  32
  33        if (dapm->dev != codec_dai->dev)
  34                return 0;
  35
  36        switch (level) {
  37        case SND_SOC_BIAS_PREPARE:
  38                if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
  39                        ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  40                                                  WM8962_FLL_MCLK, 32768,
  41                                                  sample_rate * 512);
  42                        if (ret < 0)
  43                                pr_err("Failed to start FLL: %d\n", ret);
  44
  45                        ret = snd_soc_dai_set_sysclk(codec_dai,
  46                                                     WM8962_SYSCLK_FLL,
  47                                                     sample_rate * 512,
  48                                                     SND_SOC_CLOCK_IN);
  49                        if (ret < 0) {
  50                                pr_err("Failed to set SYSCLK: %d\n", ret);
  51                                snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  52                                                    0, 0, 0);
  53                                return ret;
  54                        }
  55                }
  56                break;
  57
  58        default:
  59                break;
  60        }
  61
  62        return 0;
  63}
  64
  65static int tobermory_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_pcm_runtime *rtd;
  70        struct snd_soc_dai *codec_dai;
  71        int ret;
  72
  73        rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
  74        codec_dai = rtd->codec_dai;
  75
  76        if (dapm->dev != codec_dai->dev)
  77                return 0;
  78
  79        switch (level) {
  80        case SND_SOC_BIAS_STANDBY:
  81                ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
  82                                             32768, SND_SOC_CLOCK_IN);
  83                if (ret < 0) {
  84                        pr_err("Failed to switch away from FLL: %d\n", ret);
  85                        return ret;
  86                }
  87
  88                ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  89                                          0, 0, 0);
  90                if (ret < 0) {
  91                        pr_err("Failed to stop FLL: %d\n", ret);
  92                        return ret;
  93                }
  94                break;
  95
  96        default:
  97                break;
  98        }
  99
 100        dapm->bias_level = level;
 101
 102        return 0;
 103}
 104
 105static int tobermory_hw_params(struct snd_pcm_substream *substream,
 106                              struct snd_pcm_hw_params *params)
 107{
 108        sample_rate = params_rate(params);
 109
 110        return 0;
 111}
 112
 113static struct snd_soc_ops tobermory_ops = {
 114        .hw_params = tobermory_hw_params,
 115};
 116
 117static struct snd_soc_dai_link tobermory_dai[] = {
 118        {
 119                .name = "CPU",
 120                .stream_name = "CPU",
 121                .cpu_dai_name = "samsung-i2s.0",
 122                .codec_dai_name = "wm8962",
 123                .platform_name = "samsung-i2s.0",
 124                .codec_name = "wm8962.1-001a",
 125                .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 126                                | SND_SOC_DAIFMT_CBM_CFM,
 127                .ops = &tobermory_ops,
 128        },
 129};
 130
 131static const struct snd_kcontrol_new controls[] = {
 132        SOC_DAPM_PIN_SWITCH("Main Speaker"),
 133        SOC_DAPM_PIN_SWITCH("DMIC"),
 134};
 135
 136static struct snd_soc_dapm_widget widgets[] = {
 137        SND_SOC_DAPM_HP("Headphone", NULL),
 138        SND_SOC_DAPM_MIC("Headset Mic", NULL),
 139
 140        SND_SOC_DAPM_MIC("DMIC", NULL),
 141        SND_SOC_DAPM_MIC("AMIC", NULL),
 142
 143        SND_SOC_DAPM_SPK("Main Speaker", NULL),
 144};
 145
 146static struct snd_soc_dapm_route audio_paths[] = {
 147        { "Headphone", NULL, "HPOUTL" },
 148        { "Headphone", NULL, "HPOUTR" },
 149
 150        { "Main Speaker", NULL, "SPKOUTL" },
 151        { "Main Speaker", NULL, "SPKOUTR" },
 152
 153        { "Headset Mic", NULL, "MICBIAS" },
 154        { "IN4L", NULL, "Headset Mic" },
 155        { "IN4R", NULL, "Headset Mic" },
 156
 157        { "AMIC", NULL, "MICBIAS" },
 158        { "IN1L", NULL, "AMIC" },
 159        { "IN1R", NULL, "AMIC" },
 160
 161        { "DMIC", NULL, "MICBIAS" },
 162        { "DMICDAT", NULL, "DMIC" },
 163};
 164
 165static struct snd_soc_jack tobermory_headset;
 166
 167/* Headset jack detection DAPM pins */
 168static struct snd_soc_jack_pin tobermory_headset_pins[] = {
 169        {
 170                .pin = "Headset Mic",
 171                .mask = SND_JACK_MICROPHONE,
 172        },
 173        {
 174                .pin = "Headphone",
 175                .mask = SND_JACK_MICROPHONE,
 176        },
 177};
 178
 179static int tobermory_late_probe(struct snd_soc_card *card)
 180{
 181        struct snd_soc_pcm_runtime *rtd;
 182        struct snd_soc_component *component;
 183        struct snd_soc_dai *codec_dai;
 184        int ret;
 185
 186        rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 187        component = rtd->codec_dai->component;
 188        codec_dai = rtd->codec_dai;
 189
 190        ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
 191                                     32768, SND_SOC_CLOCK_IN);
 192        if (ret < 0)
 193                return ret;
 194
 195        ret = snd_soc_card_jack_new(card, "Headset", SND_JACK_HEADSET |
 196                                    SND_JACK_BTN_0, &tobermory_headset,
 197                                    tobermory_headset_pins,
 198                                    ARRAY_SIZE(tobermory_headset_pins));
 199        if (ret)
 200                return ret;
 201
 202        wm8962_mic_detect(component, &tobermory_headset);
 203
 204        return 0;
 205}
 206
 207static struct snd_soc_card tobermory = {
 208        .name = "Tobermory",
 209        .owner = THIS_MODULE,
 210        .dai_link = tobermory_dai,
 211        .num_links = ARRAY_SIZE(tobermory_dai),
 212
 213        .set_bias_level = tobermory_set_bias_level,
 214        .set_bias_level_post = tobermory_set_bias_level_post,
 215
 216        .controls = controls,
 217        .num_controls = ARRAY_SIZE(controls),
 218        .dapm_widgets = widgets,
 219        .num_dapm_widgets = ARRAY_SIZE(widgets),
 220        .dapm_routes = audio_paths,
 221        .num_dapm_routes = ARRAY_SIZE(audio_paths),
 222        .fully_routed = true,
 223
 224        .late_probe = tobermory_late_probe,
 225};
 226
 227static int tobermory_probe(struct platform_device *pdev)
 228{
 229        struct snd_soc_card *card = &tobermory;
 230        int ret;
 231
 232        card->dev = &pdev->dev;
 233
 234        ret = devm_snd_soc_register_card(&pdev->dev, card);
 235        if (ret)
 236                dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 237                        ret);
 238
 239        return ret;
 240}
 241
 242static struct platform_driver tobermory_driver = {
 243        .driver = {
 244                .name = "tobermory",
 245                .pm = &snd_soc_pm_ops,
 246        },
 247        .probe = tobermory_probe,
 248};
 249
 250module_platform_driver(tobermory_driver);
 251
 252MODULE_DESCRIPTION("Tobermory audio support");
 253MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 254MODULE_LICENSE("GPL");
 255MODULE_ALIAS("platform:tobermory");
 256