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.h>
  17 #include <linux/module.h>
  18
  19 #include <sound/soc.h>
  20 #include <sound/jack.h>
  21
  22 #include <mach/gpio-samsung.h>
  23 #include <asm/mach-types.h>
  24
  25 #include "i2s.h"
  26 #include "../codecs/wm8750.h"
  27
  28 /*
  29  * WM8987 is register compatible with WM8750, so using that as base driver.
  30  */
  31
  32 static struct snd_soc_card snd_soc_smartq;
  33
  34 static int smartq_hifi_hw_params(struct snd_pcm_substream *substream,
  35         struct snd_pcm_hw_params *params)
  36 {
  37         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  38         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  39         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  40         unsigned int clk = 0;
  41         int ret;
  42
  43         switch (params_rate(params)) {
  44         case 8000:
  45         case 16000:
  46         case 32000:
  47         case 48000:
  48         case 96000:
  49                 clk = 12288000;
  50                 break;
  51         case 11025:
  52         case 22050:
  53         case 44100:
  54         case 88200:
  55                 clk = 11289600;
  56                 break;
  57         }
  58
  59         /* set codec DAI configuration */
  60         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  61                                              SND_SOC_DAIFMT_NB_NF |
  62                                              SND_SOC_DAIFMT_CBS_CFS);
  63         if (ret < 0)
  64                 return ret;
  65
  66         /* set cpu DAI configuration */
  67         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  68                                            SND_SOC_DAIFMT_NB_NF |
  69                                            SND_SOC_DAIFMT_CBS_CFS);
  70         if (ret < 0)
  71                 return ret;
  72
  73         /* Use PCLK for I2S signal generation */
  74         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
  75                                         0, SND_SOC_CLOCK_IN);
  76         if (ret < 0)
  77                 return ret;
  78
  79         /* Gate the RCLK output on PAD */
  80         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
  81                                         0, SND_SOC_CLOCK_IN);
  82         if (ret < 0)
  83                 return ret;
  84
  85         /* set the codec system clock for DAC and ADC */
  86         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  87                                      SND_SOC_CLOCK_IN);
  88         if (ret < 0)
  89                 return ret;
  90
  91         return 0;
  92 }
  93
  94 /*
  95  * SmartQ WM8987 HiFi DAI operations.
  96  */
  97 static struct snd_soc_ops smartq_hifi_ops = {
  98         .hw_params = smartq_hifi_hw_params,
  99 };
 100
 101 static struct snd_soc_jack smartq_jack;
 102
 103 static struct snd_soc_jack_pin smartq_jack_pins[] = {
 104         /* Disable speaker when headphone is plugged in */
 105         {
 106                 .pin    = "Internal Speaker",
 107                 .mask   = SND_JACK_HEADPHONE,
 108         },
 109 };
 110
 111 static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
 112         {
 113                 .gpio           = S3C64XX_GPL(12),
 114                 .name           = "headphone detect",
 115                 .report         = SND_JACK_HEADPHONE,
 116                 .debounce_time  = 200,
 117         },
 118 };
 119
 120 static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
 121         SOC_DAPM_PIN_SWITCH("Internal Speaker"),
 122         SOC_DAPM_PIN_SWITCH("Headphone Jack"),
 123         SOC_DAPM_PIN_SWITCH("Internal Mic"),
 124 };
 125
 126 static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
 127                                 struct snd_kcontrol *k,
 128                                 int event)
 129 {
 130         gpio_set_value(S3C64XX_GPK(12), SND_SOC_DAPM_EVENT_OFF(event));
 131
 132         return 0;
 133 }
 134
 135 static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
 136         SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
 137         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 138         SND_SOC_DAPM_MIC("Internal Mic", NULL),
 139 };
 140
 141 static const struct snd_soc_dapm_route audio_map[] = {
 142         {"Headphone Jack", NULL, "LOUT2"},
 143         {"Headphone Jack", NULL, "ROUT2"},
 144
 145         {"Internal Speaker", NULL, "LOUT2"},
 146         {"Internal Speaker", NULL, "ROUT2"},
 147
 148         {"Mic Bias", NULL, "Internal Mic"},
 149         {"LINPUT2", NULL, "Mic Bias"},
 150 };
 151
 152 static int smartq_wm8987_init(struct snd_soc_pcm_runtime *rtd)
 153 {
 154         struct snd_soc_codec *codec = rtd->codec;
 155         struct snd_soc_dapm_context *dapm = &codec->dapm;
 156         int err = 0;
 157
 158         /* set endpoints to not connected */
 159         snd_soc_dapm_nc_pin(dapm, "LINPUT1");
 160         snd_soc_dapm_nc_pin(dapm, "RINPUT1");
 161         snd_soc_dapm_nc_pin(dapm, "OUT3");
 162         snd_soc_dapm_nc_pin(dapm, "ROUT1");
 163
 164         /* set endpoints to default off mode */
 165         snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
 166
 167         /* Headphone jack detection */
 168         err = snd_soc_jack_new(codec, "Headphone Jack",
 169                                SND_JACK_HEADPHONE, &smartq_jack);
 170         if (err)
 171                 return err;
 172
 173         err = snd_soc_jack_add_pins(&smartq_jack, ARRAY_SIZE(smartq_jack_pins),
 174                                     smartq_jack_pins);
 175         if (err)
 176                 return err;
 177
 178         err = snd_soc_jack_add_gpios(&smartq_jack,
 179                                      ARRAY_SIZE(smartq_jack_gpios),
 180                                      smartq_jack_gpios);
 181
 182         return err;
 183 }
 184
 185 static int smartq_wm8987_card_remove(struct snd_soc_card *card)
 186 {
 187         snd_soc_jack_free_gpios(&smartq_jack, ARRAY_SIZE(smartq_jack_gpios),
 188                                 smartq_jack_gpios);
 189
 190         return 0;
 191 }
 192
 193 static struct snd_soc_dai_link smartq_dai[] = {
 194         {
 195                 .name           = "wm8987",
 196                 .stream_name    = "SmartQ Hi-Fi",
 197                 .cpu_dai_name   = "samsung-i2s.0",
 198                 .codec_dai_name = "wm8750-hifi",
 199                 .platform_name  = "samsung-i2s.0",
 200                 .codec_name     = "wm8750.0-0x1a",
 201                 .init           = smartq_wm8987_init,
 202                 .ops            = &smartq_hifi_ops,
 203         },
 204 };
 205
 206 static struct snd_soc_card snd_soc_smartq = {
 207         .name = "SmartQ",
 208         .owner = THIS_MODULE,
 209         .remove = smartq_wm8987_card_remove,
 210         .dai_link = smartq_dai,
 211         .num_links = ARRAY_SIZE(smartq_dai),
 212
 213         .dapm_widgets = wm8987_dapm_widgets,
 214         .num_dapm_widgets = ARRAY_SIZE(wm8987_dapm_widgets),
 215         .dapm_routes = audio_map,
 216         .num_dapm_routes = ARRAY_SIZE(audio_map),
 217         .controls = wm8987_smartq_controls,
 218         .num_controls = ARRAY_SIZE(wm8987_smartq_controls),
 219 };
 220
 221 static struct platform_device *smartq_snd_device;
 222
 223 static int __init smartq_init(void)
 224 {
 225         int ret;
 226
 227         if (!machine_is_smartq7() && !machine_is_smartq5()) {
 228                 pr_info("Only SmartQ is supported by this ASoC driver\n");
 229                 return -ENODEV;
 230         }
 231
 232         smartq_snd_device = platform_device_alloc("soc-audio", -1);
 233         if (!smartq_snd_device)
 234                 return -ENOMEM;
 235
 236         platform_set_drvdata(smartq_snd_device, &snd_soc_smartq);
 237
 238         ret = platform_device_add(smartq_snd_device);
 239         if (ret) {
 240                 platform_device_put(smartq_snd_device);
 241                 return ret;
 242         }
 243
 244         /* Initialise GPIOs used by amplifiers */
 245         ret = gpio_request(S3C64XX_GPK(12), "amplifiers shutdown");
 246         if (ret) {
 247                 dev_err(&smartq_snd_device->dev, "Failed to register GPK12\n");
 248                 goto err_unregister_device;
 249         }
 250
 251         /* Disable amplifiers */
 252         ret = gpio_direction_output(S3C64XX_GPK(12), 1);
 253         if (ret) {
 254                 dev_err(&smartq_snd_device->dev, "Failed to configure GPK12\n");
 255                 goto err_free_gpio_amp_shut;
 256         }
 257
 258         return 0;
 259
 260 err_free_gpio_amp_shut:
 261         gpio_free(S3C64XX_GPK(12));
 262 err_unregister_device:
 263         platform_device_unregister(smartq_snd_device);
 264
 265         return ret;
 266 }
 267
 268 static void __exit smartq_exit(void)
 269 {
 270         gpio_free(S3C64XX_GPK(12));
 271
 272         platform_device_unregister(smartq_snd_device);
 273 }
 274
 275 module_init(smartq_init);
 276 module_exit(smartq_exit);
 277
 278 /* Module information */
 279 MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
 280 MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
 281 MODULE_LICENSE("GPL");