kernel/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         /* Use PCLK for I2S signal generation */
  60         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
  61                                         0, SND_SOC_CLOCK_IN);
  62         if (ret < 0)
  63                 return ret;
  64
  65         /* Gate the RCLK output on PAD */
  66         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
  67                                         0, SND_SOC_CLOCK_IN);
  68         if (ret < 0)
  69                 return ret;
  70
  71         /* set the codec system clock for DAC and ADC */
  72         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  73                                      SND_SOC_CLOCK_IN);
  74         if (ret < 0)
  75                 return ret;
  76
  77         return 0;
  78 }
  79
  80 /*
  81  * SmartQ WM8987 HiFi DAI operations.
  82  */
  83 static struct snd_soc_ops smartq_hifi_ops = {
  84         .hw_params = smartq_hifi_hw_params,
  85 };
  86
  87 static struct snd_soc_jack smartq_jack;
  88
  89 static struct snd_soc_jack_pin smartq_jack_pins[] = {
  90         /* Disable speaker when headphone is plugged in */
  91         {
  92                 .pin    = "Internal Speaker",
  93                 .mask   = SND_JACK_HEADPHONE,
  94         },
  95 };
  96
  97 static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
  98         {
  99                 .gpio           = S3C64XX_GPL(12),
 100                 .name           = "headphone detect",
 101                 .report         = SND_JACK_HEADPHONE,
 102                 .debounce_time  = 200,
 103         },
 104 };
 105
 106 static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
 107         SOC_DAPM_PIN_SWITCH("Internal Speaker"),
 108         SOC_DAPM_PIN_SWITCH("Headphone Jack"),
 109         SOC_DAPM_PIN_SWITCH("Internal Mic"),
 110 };
 111
 112 static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
 113                                 struct snd_kcontrol *k,
 114                                 int event)
 115 {
 116         gpio_set_value(S3C64XX_GPK(12), SND_SOC_DAPM_EVENT_OFF(event));
 117
 118         return 0;
 119 }
 120
 121 static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
 122         SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
 123         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 124         SND_SOC_DAPM_MIC("Internal Mic", NULL),
 125 };
 126
 127 static const struct snd_soc_dapm_route audio_map[] = {
 128         {"Headphone Jack", NULL, "LOUT2"},
 129         {"Headphone Jack", NULL, "ROUT2"},
 130
 131         {"Internal Speaker", NULL, "LOUT2"},
 132         {"Internal Speaker", NULL, "ROUT2"},
 133
 134         {"Mic Bias", NULL, "Internal Mic"},
 135         {"LINPUT2", NULL, "Mic Bias"},
 136 };
 137
 138 static int smartq_wm8987_init(struct snd_soc_pcm_runtime *rtd)
 139 {
 140         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
 141         int err = 0;
 142
 143         /* set endpoints to not connected */
 144         snd_soc_dapm_nc_pin(dapm, "LINPUT1");
 145         snd_soc_dapm_nc_pin(dapm, "RINPUT1");
 146         snd_soc_dapm_nc_pin(dapm, "OUT3");
 147         snd_soc_dapm_nc_pin(dapm, "ROUT1");
 148
 149         /* Headphone jack detection */
 150         err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
 151                                     SND_JACK_HEADPHONE, &smartq_jack,
 152                                     smartq_jack_pins,
 153                                     ARRAY_SIZE(smartq_jack_pins));
 154         if (err)
 155                 return err;
 156
 157         err = snd_soc_jack_add_gpios(&smartq_jack,
 158                                      ARRAY_SIZE(smartq_jack_gpios),
 159                                      smartq_jack_gpios);
 160
 161         return err;
 162 }
 163
 164 static int smartq_wm8987_card_remove(struct snd_soc_card *card)
 165 {
 166         snd_soc_jack_free_gpios(&smartq_jack, ARRAY_SIZE(smartq_jack_gpios),
 167                                 smartq_jack_gpios);
 168
 169         return 0;
 170 }
 171
 172 static struct snd_soc_dai_link smartq_dai[] = {
 173         {
 174                 .name           = "wm8987",
 175                 .stream_name    = "SmartQ Hi-Fi",
 176                 .cpu_dai_name   = "samsung-i2s.0",
 177                 .codec_dai_name = "wm8750-hifi",
 178                 .platform_name  = "samsung-i2s.0",
 179                 .codec_name     = "wm8750.0-0x1a",
 180                 .init           = smartq_wm8987_init,
 181                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 182                                   SND_SOC_DAIFMT_CBS_CFS,
 183                 .ops            = &smartq_hifi_ops,
 184         },
 185 };
 186
 187 static struct snd_soc_card snd_soc_smartq = {
 188         .name = "SmartQ",
 189         .owner = THIS_MODULE,
 190         .remove = smartq_wm8987_card_remove,
 191         .dai_link = smartq_dai,
 192         .num_links = ARRAY_SIZE(smartq_dai),
 193
 194         .dapm_widgets = wm8987_dapm_widgets,
 195         .num_dapm_widgets = ARRAY_SIZE(wm8987_dapm_widgets),
 196         .dapm_routes = audio_map,
 197         .num_dapm_routes = ARRAY_SIZE(audio_map),
 198         .controls = wm8987_smartq_controls,
 199         .num_controls = ARRAY_SIZE(wm8987_smartq_controls),
 200 };
 201
 202 static struct platform_device *smartq_snd_device;
 203
 204 static int __init smartq_init(void)
 205 {
 206         int ret;
 207
 208         if (!machine_is_smartq7() && !machine_is_smartq5()) {
 209                 pr_info("Only SmartQ is supported by this ASoC driver\n");
 210                 return -ENODEV;
 211         }
 212
 213         smartq_snd_device = platform_device_alloc("soc-audio", -1);
 214         if (!smartq_snd_device)
 215                 return -ENOMEM;
 216
 217         platform_set_drvdata(smartq_snd_device, &snd_soc_smartq);
 218
 219         ret = platform_device_add(smartq_snd_device);
 220         if (ret) {
 221                 platform_device_put(smartq_snd_device);
 222                 return ret;
 223         }
 224
 225         /* Initialise GPIOs used by amplifiers */
 226         ret = gpio_request(S3C64XX_GPK(12), "amplifiers shutdown");
 227         if (ret) {
 228                 dev_err(&smartq_snd_device->dev, "Failed to register GPK12\n");
 229                 goto err_unregister_device;
 230         }
 231
 232         /* Disable amplifiers */
 233         ret = gpio_direction_output(S3C64XX_GPK(12), 1);
 234         if (ret) {
 235                 dev_err(&smartq_snd_device->dev, "Failed to configure GPK12\n");
 236                 goto err_free_gpio_amp_shut;
 237         }
 238
 239         return 0;
 240
 241 err_free_gpio_amp_shut:
 242         gpio_free(S3C64XX_GPK(12));
 243 err_unregister_device:
 244         platform_device_unregister(smartq_snd_device);
 245
 246         return ret;
 247 }
 248
 249 static void __exit smartq_exit(void)
 250 {
 251         gpio_free(S3C64XX_GPK(12));
 252
 253         platform_device_unregister(smartq_snd_device);
 254 }
 255
 256 module_init(smartq_init);
 257 module_exit(smartq_exit);
 258
 259 /* Module information */
 260 MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
 261 MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
 262 MODULE_LICENSE("GPL");