sound/soc/samsung/smartq_wm8987.c

   1 /* sound/soc/samsung/smartq_wm8987.c
   2  *
   3  * Copyright 2010 Maurus Cuelenaere <mcuelenaere@gmail.com>
   4  *
   5  * Based on smdk6410_wm8987.c
   6  *     Copyright 2007 Wolfson Microelectronics PLC. - linux@wolfsonmicro.com
   7  *     Graeme Gregory - graeme.gregory@wolfsonmicro.com
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  *
  14  */
  15
  16 #include <linux/gpio/consumer.h>
  17 #include <linux/module.h>
  18
  19 #include <sound/soc.h>
  20 #include <sound/jack.h>
  21
  22 #include "i2s.h"
  23 #include "../codecs/wm8750.h"
  24
  25 /*
  26  * WM8987 is register compatible with WM8750, so using that as base driver.
  27  */
  28
  29 static struct snd_soc_card snd_soc_smartq;
  30
  31 static int smartq_hifi_hw_params(struct snd_pcm_substream *substream,
  32         struct snd_pcm_hw_params *params)
  33 {
  34         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  35         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  36         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  37         unsigned int clk = 0;
  38         int ret;
  39
  40         switch (params_rate(params)) {
  41         case 8000:
  42         case 16000:
  43         case 32000:
  44         case 48000:
  45         case 96000:
  46                 clk = 12288000;
  47                 break;
  48         case 11025:
  49         case 22050:
  50         case 44100:
  51         case 88200:
  52                 clk = 11289600;
  53                 break;
  54         }
  55
  56         /* Use PCLK for I2S signal generation */
  57         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
  58                                         0, SND_SOC_CLOCK_IN);
  59         if (ret < 0)
  60                 return ret;
  61
  62         /* Gate the RCLK output on PAD */
  63         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
  64                                         0, SND_SOC_CLOCK_IN);
  65         if (ret < 0)
  66                 return ret;
  67
  68         /* set the codec system clock for DAC and ADC */
  69         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  70                                      SND_SOC_CLOCK_IN);
  71         if (ret < 0)
  72                 return ret;
  73
  74         return 0;
  75 }
  76
  77 /*
  78  * SmartQ WM8987 HiFi DAI operations.
  79  */
  80 static struct snd_soc_ops smartq_hifi_ops = {
  81         .hw_params = smartq_hifi_hw_params,
  82 };
  83
  84 static struct snd_soc_jack smartq_jack;
  85
  86 static struct snd_soc_jack_pin smartq_jack_pins[] = {
  87         /* Disable speaker when headphone is plugged in */
  88         {
  89                 .pin    = "Internal Speaker",
  90                 .mask   = SND_JACK_HEADPHONE,
  91         },
  92 };
  93
  94 static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
  95         {
  96                 .gpio           = -1,
  97                 .name           = "headphone detect",
  98                 .report         = SND_JACK_HEADPHONE,
  99                 .debounce_time  = 200,
 100         },
 101 };
 102
 103 static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
 104         SOC_DAPM_PIN_SWITCH("Internal Speaker"),
 105         SOC_DAPM_PIN_SWITCH("Headphone Jack"),
 106         SOC_DAPM_PIN_SWITCH("Internal Mic"),
 107 };
 108
 109 static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
 110                                 struct snd_kcontrol *k,
 111                                 int event)
 112 {
 113         struct gpio_desc *gpio = snd_soc_card_get_drvdata(&snd_soc_smartq);
 114
 115         gpiod_set_value(gpio, SND_SOC_DAPM_EVENT_OFF(event));
 116
 117         return 0;
 118 }
 119
 120 static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
 121         SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
 122         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 123         SND_SOC_DAPM_MIC("Internal Mic", NULL),
 124 };
 125
 126 static const struct snd_soc_dapm_route audio_map[] = {
 127         {"Headphone Jack", NULL, "LOUT2"},
 128         {"Headphone Jack", NULL, "ROUT2"},
 129
 130         {"Internal Speaker", NULL, "LOUT2"},
 131         {"Internal Speaker", NULL, "ROUT2"},
 132
 133         {"Mic Bias", NULL, "Internal Mic"},
 134         {"LINPUT2", NULL, "Mic Bias"},
 135 };
 136
 137 static int smartq_wm8987_init(struct snd_soc_pcm_runtime *rtd)
 138 {
 139         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
 140         int err = 0;
 141
 142         /* set endpoints to not connected */
 143         snd_soc_dapm_nc_pin(dapm, "LINPUT1");
 144         snd_soc_dapm_nc_pin(dapm, "RINPUT1");
 145         snd_soc_dapm_nc_pin(dapm, "OUT3");
 146         snd_soc_dapm_nc_pin(dapm, "ROUT1");
 147
 148         /* Headphone jack detection */
 149         err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
 150                                     SND_JACK_HEADPHONE, &smartq_jack,
 151                                     smartq_jack_pins,
 152                                     ARRAY_SIZE(smartq_jack_pins));
 153         if (err)
 154                 return err;
 155
 156         err = snd_soc_jack_add_gpios(&smartq_jack,
 157                                      ARRAY_SIZE(smartq_jack_gpios),
 158                                      smartq_jack_gpios);
 159
 160         return err;
 161 }
 162
 163 static int smartq_wm8987_card_remove(struct snd_soc_card *card)
 164 {
 165         snd_soc_jack_free_gpios(&smartq_jack, ARRAY_SIZE(smartq_jack_gpios),
 166                                 smartq_jack_gpios);
 167
 168         return 0;
 169 }
 170
 171 static struct snd_soc_dai_link smartq_dai[] = {
 172         {
 173                 .name           = "wm8987",
 174                 .stream_name    = "SmartQ Hi-Fi",
 175                 .cpu_dai_name   = "samsung-i2s.0",
 176                 .codec_dai_name = "wm8750-hifi",
 177                 .platform_name  = "samsung-i2s.0",
 178                 .codec_name     = "wm8750.0-0x1a",
 179                 .init           = smartq_wm8987_init,
 180                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 181                                   SND_SOC_DAIFMT_CBS_CFS,
 182                 .ops            = &smartq_hifi_ops,
 183         },
 184 };
 185
 186 static struct snd_soc_card snd_soc_smartq = {
 187         .name = "SmartQ",
 188         .owner = THIS_MODULE,
 189         .remove = smartq_wm8987_card_remove,
 190         .dai_link = smartq_dai,
 191         .num_links = ARRAY_SIZE(smartq_dai),
 192
 193         .dapm_widgets = wm8987_dapm_widgets,
 194         .num_dapm_widgets = ARRAY_SIZE(wm8987_dapm_widgets),
 195         .dapm_routes = audio_map,
 196         .num_dapm_routes = ARRAY_SIZE(audio_map),
 197         .controls = wm8987_smartq_controls,
 198         .num_controls = ARRAY_SIZE(wm8987_smartq_controls),
 199 };
 200
 201 static int smartq_probe(struct platform_device *pdev)
 202 {
 203         struct gpio_desc *gpio;
 204         int ret;
 205
 206         platform_set_drvdata(pdev, &snd_soc_smartq);
 207
 208         /* Initialise GPIOs used by amplifiers */
 209         gpio = devm_gpiod_get(&pdev->dev, "amplifiers shutdown",
 210                               GPIOD_OUT_HIGH);
 211         if (IS_ERR(gpio)) {
 212                 dev_err(&pdev->dev, "Failed to register GPK12\n");
 213                 ret = PTR_ERR(gpio);
 214                 goto out;
 215         }
 216         snd_soc_card_set_drvdata(&snd_soc_smartq, gpio);
 217
 218         ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_smartq);
 219         if (ret)
 220                 dev_err(&pdev->dev, "Failed to register card\n");
 221
 222 out:
 223         return ret;
 224 }
 225
 226 static struct platform_driver smartq_driver = {
 227         .driver = {
 228                 .name = "smartq-audio",
 229         },
 230         .probe = smartq_probe,
 231 };
 232
 233 module_platform_driver(smartq_driver);
 234
 235 /* Module information */
 236 MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
 237 MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
 238 MODULE_LICENSE("GPL");