sound/soc/samsung/h1940_uda1380.c

   1 /*
   2  * h1940-uda1380.c  --  ALSA Soc Audio Layer
   3  *
   4  * Copyright (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
   5  * Copyright (c) 2010 Vasily Khoruzhick <anarsoul@gmail.com>
   6  *
   7  * Based on version from Arnaud Patard <arnaud.patard@rtp-net.org>
   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/types.h>
  17 #include <linux/gpio.h>
  18 #include <linux/module.h>
  19
  20 #include <sound/soc.h>
  21 #include <sound/jack.h>
  22
  23 #include "regs-iis.h"
  24 #include <asm/mach-types.h>
  25
  26 #include <mach/gpio-samsung.h>
  27 #include "s3c24xx-i2s.h"
  28
  29 static unsigned int rates[] = {
  30         11025,
  31         22050,
  32         44100,
  33 };
  34
  35 static struct snd_pcm_hw_constraint_list hw_rates = {
  36         .count = ARRAY_SIZE(rates),
  37         .list = rates,
  38         .mask = 0,
  39 };
  40
  41 static struct snd_soc_jack hp_jack;
  42
  43 static struct snd_soc_jack_pin hp_jack_pins[] = {
  44         {
  45                 .pin    = "Headphone Jack",
  46                 .mask   = SND_JACK_HEADPHONE,
  47         },
  48         {
  49                 .pin    = "Speaker",
  50                 .mask   = SND_JACK_HEADPHONE,
  51                 .invert = 1,
  52         },
  53 };
  54
  55 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
  56         {
  57                 .gpio                   = S3C2410_GPG(4),
  58                 .name                   = "hp-gpio",
  59                 .report                 = SND_JACK_HEADPHONE,
  60                 .invert                 = 1,
  61                 .debounce_time          = 200,
  62         },
  63 };
  64
  65 static int h1940_startup(struct snd_pcm_substream *substream)
  66 {
  67         struct snd_pcm_runtime *runtime = substream->runtime;
  68
  69         return snd_pcm_hw_constraint_list(runtime, 0,
  70                                         SNDRV_PCM_HW_PARAM_RATE,
  71                                         &hw_rates);
  72 }
  73
  74 static int h1940_hw_params(struct snd_pcm_substream *substream,
  75                                 struct snd_pcm_hw_params *params)
  76 {
  77         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  78         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  79         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  80         int div;
  81         int ret;
  82         unsigned int rate = params_rate(params);
  83
  84         switch (rate) {
  85         case 11025:
  86         case 22050:
  87         case 44100:
  88                 div = s3c24xx_i2s_get_clockrate() / (384 * rate);
  89                 if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (192 * rate))
  90                         div++;
  91                 break;
  92         default:
  93                 dev_err(rtd->dev, "%s: rate %d is not supported\n",
  94                         __func__, rate);
  95                 return -EINVAL;
  96         }
  97
  98         /* set codec DAI configuration */
  99         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 100                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 101         if (ret < 0)
 102                 return ret;
 103
 104         /* set cpu DAI configuration */
 105         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 106                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 107         if (ret < 0)
 108                 return ret;
 109
 110         /* select clock source */
 111         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_PCLK, rate,
 112                         SND_SOC_CLOCK_OUT);
 113         if (ret < 0)
 114                 return ret;
 115
 116         /* set MCLK division for sample rate */
 117         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 118                 S3C2410_IISMOD_384FS);
 119         if (ret < 0)
 120                 return ret;
 121
 122         /* set BCLK division for sample rate */
 123         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
 124                 S3C2410_IISMOD_32FS);
 125         if (ret < 0)
 126                 return ret;
 127
 128         /* set prescaler division for sample rate */
 129         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 130                 S3C24XX_PRESCALE(div, div));
 131         if (ret < 0)
 132                 return ret;
 133
 134         return 0;
 135 }
 136
 137 static struct snd_soc_ops h1940_ops = {
 138         .startup        = h1940_startup,
 139         .hw_params      = h1940_hw_params,
 140 };
 141
 142 static int h1940_spk_power(struct snd_soc_dapm_widget *w,
 143                                 struct snd_kcontrol *kcontrol, int event)
 144 {
 145         if (SND_SOC_DAPM_EVENT_ON(event))
 146                 gpio_set_value(S3C_GPIO_END + 9, 1);
 147         else
 148                 gpio_set_value(S3C_GPIO_END + 9, 0);
 149
 150         return 0;
 151 }
 152
 153 /* h1940 machine dapm widgets */
 154 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
 155         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 156         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 157         SND_SOC_DAPM_SPK("Speaker", h1940_spk_power),
 158 };
 159
 160 /* h1940 machine audio_map */
 161 static const struct snd_soc_dapm_route audio_map[] = {
 162         /* headphone connected to VOUTLHP, VOUTRHP */
 163         {"Headphone Jack", NULL, "VOUTLHP"},
 164         {"Headphone Jack", NULL, "VOUTRHP"},
 165
 166         /* ext speaker connected to VOUTL, VOUTR  */
 167         {"Speaker", NULL, "VOUTL"},
 168         {"Speaker", NULL, "VOUTR"},
 169
 170         /* mic is connected to VINM */
 171         {"VINM", NULL, "Mic Jack"},
 172 };
 173
 174 static struct platform_device *s3c24xx_snd_device;
 175
 176 static int h1940_uda1380_init(struct snd_soc_pcm_runtime *rtd)
 177 {
 178         struct snd_soc_codec *codec = rtd->codec;
 179
 180         snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 181                 &hp_jack);
 182
 183         snd_soc_jack_add_pins(&hp_jack, ARRAY_SIZE(hp_jack_pins),
 184                 hp_jack_pins);
 185
 186         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 187                 hp_jack_gpios);
 188
 189         return 0;
 190 }
 191
 192 static int h1940_uda1380_card_remove(struct snd_soc_card *card)
 193 {
 194         snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 195                 hp_jack_gpios);
 196
 197         return 0;
 198 }
 199
 200 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
 201 static struct snd_soc_dai_link h1940_uda1380_dai[] = {
 202         {
 203                 .name           = "uda1380",
 204                 .stream_name    = "UDA1380 Duplex",
 205                 .cpu_dai_name   = "s3c24xx-iis",
 206                 .codec_dai_name = "uda1380-hifi",
 207                 .init           = h1940_uda1380_init,
 208                 .platform_name  = "s3c24xx-iis",
 209                 .codec_name     = "uda1380-codec.0-001a",
 210                 .ops            = &h1940_ops,
 211         },
 212 };
 213
 214 static struct snd_soc_card h1940_asoc = {
 215         .name = "h1940",
 216         .owner = THIS_MODULE,
 217         .remove = h1940_uda1380_card_remove,
 218         .dai_link = h1940_uda1380_dai,
 219         .num_links = ARRAY_SIZE(h1940_uda1380_dai),
 220
 221         .dapm_widgets = uda1380_dapm_widgets,
 222         .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
 223         .dapm_routes = audio_map,
 224         .num_dapm_routes = ARRAY_SIZE(audio_map),
 225 };
 226
 227 static int __init h1940_init(void)
 228 {
 229         int ret;
 230
 231         if (!machine_is_h1940())
 232                 return -ENODEV;
 233
 234         /* configure some gpios */
 235         ret = gpio_request(S3C_GPIO_END + 9, "speaker-power");
 236         if (ret)
 237                 goto err_out;
 238
 239         ret = gpio_direction_output(S3C_GPIO_END + 9, 0);
 240         if (ret)
 241                 goto err_gpio;
 242
 243         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
 244         if (!s3c24xx_snd_device) {
 245                 ret = -ENOMEM;
 246                 goto err_gpio;
 247         }
 248
 249         platform_set_drvdata(s3c24xx_snd_device, &h1940_asoc);
 250         ret = platform_device_add(s3c24xx_snd_device);
 251
 252         if (ret)
 253                 goto err_plat;
 254
 255         return 0;
 256
 257 err_plat:
 258         platform_device_put(s3c24xx_snd_device);
 259 err_gpio:
 260         gpio_free(S3C_GPIO_END + 9);
 261
 262 err_out:
 263         return ret;
 264 }
 265
 266 static void __exit h1940_exit(void)
 267 {
 268         platform_device_unregister(s3c24xx_snd_device);
 269         gpio_free(S3C_GPIO_END + 9);
 270 }
 271
 272 module_init(h1940_init);
 273 module_exit(h1940_exit);
 274
 275 /* Module information */
 276 MODULE_AUTHOR("Arnaud Patard, Vasily Khoruzhick");
 277 MODULE_DESCRIPTION("ALSA SoC H1940");
 278 MODULE_LICENSE("GPL");