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