linux/sound/soc/samsung/tobermory.c
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   1// SPDX-License-Identifier: GPL-2.0+
   2//
   3// Tobermory audio support
   4//
   5// Copyright 2011 Wolfson Microelectronics
   6
   7#include <sound/soc.h>
   8#include <sound/soc-dapm.h>
   9#include <sound/jack.h>
  10#include <linux/gpio.h>
  11#include <linux/module.h>
  12
  13#include "../codecs/wm8962.h"
  14
  15static int sample_rate = 44100;
  16
  17static int tobermory_set_bias_level(struct snd_soc_card *card,
  18                                          struct snd_soc_dapm_context *dapm,
  19                                          enum snd_soc_bias_level level)
  20{
  21        struct snd_soc_pcm_runtime *rtd;
  22        struct snd_soc_dai *codec_dai;
  23        int ret;
  24
  25        rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
  26        codec_dai = asoc_rtd_to_codec(rtd, 0);
  27
  28        if (dapm->dev != codec_dai->dev)
  29                return 0;
  30
  31        switch (level) {
  32        case SND_SOC_BIAS_PREPARE:
  33                if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
  34                        ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  35                                                  WM8962_FLL_MCLK, 32768,
  36                                                  sample_rate * 512);
  37                        if (ret < 0)
  38                                pr_err("Failed to start FLL: %d\n", ret);
  39
  40                        ret = snd_soc_dai_set_sysclk(codec_dai,
  41                                                     WM8962_SYSCLK_FLL,
  42                                                     sample_rate * 512,
  43                                                     SND_SOC_CLOCK_IN);
  44                        if (ret < 0) {
  45                                pr_err("Failed to set SYSCLK: %d\n", ret);
  46                                snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  47                                                    0, 0, 0);
  48                                return ret;
  49                        }
  50                }
  51                break;
  52
  53        default:
  54                break;
  55        }
  56
  57        return 0;
  58}
  59
  60static int tobermory_set_bias_level_post(struct snd_soc_card *card,
  61                                               struct snd_soc_dapm_context *dapm,
  62                                               enum snd_soc_bias_level level)
  63{
  64        struct snd_soc_pcm_runtime *rtd;
  65        struct snd_soc_dai *codec_dai;
  66        int ret;
  67
  68        rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
  69        codec_dai = asoc_rtd_to_codec(rtd, 0);
  70
  71        if (dapm->dev != codec_dai->dev)
  72                return 0;
  73
  74        switch (level) {
  75        case SND_SOC_BIAS_STANDBY:
  76                ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
  77                                             32768, SND_SOC_CLOCK_IN);
  78                if (ret < 0) {
  79                        pr_err("Failed to switch away from FLL: %d\n", ret);
  80                        return ret;
  81                }
  82
  83                ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  84                                          0, 0, 0);
  85                if (ret < 0) {
  86                        pr_err("Failed to stop FLL: %d\n", ret);
  87                        return ret;
  88                }
  89                break;
  90
  91        default:
  92                break;
  93        }
  94
  95        dapm->bias_level = level;
  96
  97        return 0;
  98}
  99
 100static int tobermory_hw_params(struct snd_pcm_substream *substream,
 101                              struct snd_pcm_hw_params *params)
 102{
 103        sample_rate = params_rate(params);
 104
 105        return 0;
 106}
 107
 108static struct snd_soc_ops tobermory_ops = {
 109        .hw_params = tobermory_hw_params,
 110};
 111
 112SND_SOC_DAILINK_DEFS(cpu,
 113        DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
 114        DAILINK_COMP_ARRAY(COMP_CODEC("wm8962.1-001a", "wm8962")),
 115        DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
 116
 117static struct snd_soc_dai_link tobermory_dai[] = {
 118        {
 119                .name = "CPU",
 120                .stream_name = "CPU",
 121                .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 122                                | SND_SOC_DAIFMT_CBM_CFM,
 123                .ops = &tobermory_ops,
 124                SND_SOC_DAILINK_REG(cpu),
 125        },
 126};
 127
 128static const struct snd_kcontrol_new controls[] = {
 129        SOC_DAPM_PIN_SWITCH("Main Speaker"),
 130        SOC_DAPM_PIN_SWITCH("DMIC"),
 131};
 132
 133static struct snd_soc_dapm_widget widgets[] = {
 134        SND_SOC_DAPM_HP("Headphone", NULL),
 135        SND_SOC_DAPM_MIC("Headset Mic", NULL),
 136
 137        SND_SOC_DAPM_MIC("DMIC", NULL),
 138        SND_SOC_DAPM_MIC("AMIC", NULL),
 139
 140        SND_SOC_DAPM_SPK("Main Speaker", NULL),
 141};
 142
 143static struct snd_soc_dapm_route audio_paths[] = {
 144        { "Headphone", NULL, "HPOUTL" },
 145        { "Headphone", NULL, "HPOUTR" },
 146
 147        { "Main Speaker", NULL, "SPKOUTL" },
 148        { "Main Speaker", NULL, "SPKOUTR" },
 149
 150        { "Headset Mic", NULL, "MICBIAS" },
 151        { "IN4L", NULL, "Headset Mic" },
 152        { "IN4R", NULL, "Headset Mic" },
 153
 154        { "AMIC", NULL, "MICBIAS" },
 155        { "IN1L", NULL, "AMIC" },
 156        { "IN1R", NULL, "AMIC" },
 157
 158        { "DMIC", NULL, "MICBIAS" },
 159        { "DMICDAT", NULL, "DMIC" },
 160};
 161
 162static struct snd_soc_jack tobermory_headset;
 163
 164/* Headset jack detection DAPM pins */
 165static struct snd_soc_jack_pin tobermory_headset_pins[] = {
 166        {
 167                .pin = "Headset Mic",
 168                .mask = SND_JACK_MICROPHONE,
 169        },
 170        {
 171                .pin = "Headphone",
 172                .mask = SND_JACK_MICROPHONE,
 173        },
 174};
 175
 176static int tobermory_late_probe(struct snd_soc_card *card)
 177{
 178        struct snd_soc_pcm_runtime *rtd;
 179        struct snd_soc_component *component;
 180        struct snd_soc_dai *codec_dai;
 181        int ret;
 182
 183        rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 184        component = asoc_rtd_to_codec(rtd, 0)->component;
 185        codec_dai = asoc_rtd_to_codec(rtd, 0);
 186
 187        ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
 188                                     32768, SND_SOC_CLOCK_IN);
 189        if (ret < 0)
 190                return ret;
 191
 192        ret = snd_soc_card_jack_new(card, "Headset", SND_JACK_HEADSET |
 193                                    SND_JACK_BTN_0, &tobermory_headset,
 194                                    tobermory_headset_pins,
 195                                    ARRAY_SIZE(tobermory_headset_pins));
 196        if (ret)
 197                return ret;
 198
 199        wm8962_mic_detect(component, &tobermory_headset);
 200
 201        return 0;
 202}
 203
 204static struct snd_soc_card tobermory = {
 205        .name = "Tobermory",
 206        .owner = THIS_MODULE,
 207        .dai_link = tobermory_dai,
 208        .num_links = ARRAY_SIZE(tobermory_dai),
 209
 210        .set_bias_level = tobermory_set_bias_level,
 211        .set_bias_level_post = tobermory_set_bias_level_post,
 212
 213        .controls = controls,
 214        .num_controls = ARRAY_SIZE(controls),
 215        .dapm_widgets = widgets,
 216        .num_dapm_widgets = ARRAY_SIZE(widgets),
 217        .dapm_routes = audio_paths,
 218        .num_dapm_routes = ARRAY_SIZE(audio_paths),
 219        .fully_routed = true,
 220
 221        .late_probe = tobermory_late_probe,
 222};
 223
 224static int tobermory_probe(struct platform_device *pdev)
 225{
 226        struct snd_soc_card *card = &tobermory;
 227        int ret;
 228
 229        card->dev = &pdev->dev;
 230
 231        ret = devm_snd_soc_register_card(&pdev->dev, card);
 232        if (ret && ret != -EPROBE_DEFER)
 233                dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 234                        ret);
 235
 236        return ret;
 237}
 238
 239static struct platform_driver tobermory_driver = {
 240        .driver = {
 241                .name = "tobermory",
 242                .pm = &snd_soc_pm_ops,
 243        },
 244        .probe = tobermory_probe,
 245};
 246
 247module_platform_driver(tobermory_driver);
 248
 249MODULE_DESCRIPTION("Tobermory audio support");
 250MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 251MODULE_LICENSE("GPL");
 252MODULE_ALIAS("platform:tobermory");
 253