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
  19 #include <sound/soc.h>
  20 #include <sound/jack.h>
  21
  22 #include <plat/regs-iis.h>
  23 #include <mach/h1940-latch.h>
  24 #include <asm/mach-types.h>
  25
  26 #include "s3c24xx-i2s.h"
  27
  28 static unsigned int rates[] = {
  29         11025,
  30         22050,
  31         44100,
  32 };
  33
  34 static struct snd_pcm_hw_constraint_list hw_rates = {
  35         .count = ARRAY_SIZE(rates),
  36         .list = rates,
  37         .mask = 0,
  38 };
  39
  40 static struct snd_soc_jack hp_jack;
  41
  42 static struct snd_soc_jack_pin hp_jack_pins[] = {
  43         {
  44                 .pin    = "Headphone Jack",
  45                 .mask   = SND_JACK_HEADPHONE,
  46         },
  47         {
  48                 .pin    = "Speaker",
  49                 .mask   = SND_JACK_HEADPHONE,
  50                 .invert = 1,
  51         },
  52 };
  53
  54 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
  55         {
  56                 .gpio                   = S3C2410_GPG(4),
  57                 .name                   = "hp-gpio",
  58                 .report                 = SND_JACK_HEADPHONE,
  59                 .invert                 = 1,
  60                 .debounce_time          = 200,
  61         },
  62 };
  63
  64 static int h1940_startup(struct snd_pcm_substream *substream)
  65 {
  66         struct snd_pcm_runtime *runtime = substream->runtime;
  67
  68         runtime->hw.rate_min = hw_rates.list[0];
  69         runtime->hw.rate_max = hw_rates.list[hw_rates.count - 1];
  70         runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
  71
  72         return snd_pcm_hw_constraint_list(runtime, 0,
  73                                         SNDRV_PCM_HW_PARAM_RATE,
  74                                         &hw_rates);
  75 }
  76
  77 static int h1940_hw_params(struct snd_pcm_substream *substream,
  78                                 struct snd_pcm_hw_params *params)
  79 {
  80         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  81         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  82         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  83         int div;
  84         int ret;
  85         unsigned int rate = params_rate(params);
  86
  87         switch (rate) {
  88         case 11025:
  89         case 22050:
  90         case 44100:
  91                 div = s3c24xx_i2s_get_clockrate() / (384 * rate);
  92                 if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (192 * rate))
  93                         div++;
  94                 break;
  95         default:
  96                 dev_err(&rtd->dev, "%s: rate %d is not supported\n",
  97                         __func__, rate);
  98                 return -EINVAL;
  99         }
 100
 101         /* set codec DAI configuration */
 102         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 103                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 104         if (ret < 0)
 105                 return ret;
 106
 107         /* set cpu DAI configuration */
 108         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 109                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 110         if (ret < 0)
 111                 return ret;
 112
 113         /* select clock source */
 114         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_PCLK, rate,
 115                         SND_SOC_CLOCK_OUT);
 116         if (ret < 0)
 117                 return ret;
 118
 119         /* set MCLK division for sample rate */
 120         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 121                 S3C2410_IISMOD_384FS);
 122         if (ret < 0)
 123                 return ret;
 124
 125         /* set BCLK division for sample rate */
 126         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
 127                 S3C2410_IISMOD_32FS);
 128         if (ret < 0)
 129                 return ret;
 130
 131         /* set prescaler division for sample rate */
 132         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 133                 S3C24XX_PRESCALE(div, div));
 134         if (ret < 0)
 135                 return ret;
 136
 137         return 0;
 138 }
 139
 140 static struct snd_soc_ops h1940_ops = {
 141         .startup        = h1940_startup,
 142         .hw_params      = h1940_hw_params,
 143 };
 144
 145 static int h1940_spk_power(struct snd_soc_dapm_widget *w,
 146                                 struct snd_kcontrol *kcontrol, int event)
 147 {
 148         if (SND_SOC_DAPM_EVENT_ON(event))
 149                 gpio_set_value(H1940_LATCH_AUDIO_POWER, 1);
 150         else
 151                 gpio_set_value(H1940_LATCH_AUDIO_POWER, 0);
 152
 153         return 0;
 154 }
 155
 156 /* h1940 machine dapm widgets */
 157 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
 158         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 159         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 160         SND_SOC_DAPM_SPK("Speaker", h1940_spk_power),
 161 };
 162
 163 /* h1940 machine audio_map */
 164 static const struct snd_soc_dapm_route audio_map[] = {
 165         /* headphone connected to VOUTLHP, VOUTRHP */
 166         {"Headphone Jack", NULL, "VOUTLHP"},
 167         {"Headphone Jack", NULL, "VOUTRHP"},
 168
 169         /* ext speaker connected to VOUTL, VOUTR  */
 170         {"Speaker", NULL, "VOUTL"},
 171         {"Speaker", NULL, "VOUTR"},
 172
 173         /* mic is connected to VINM */
 174         {"VINM", NULL, "Mic Jack"},
 175 };
 176
 177 static struct platform_device *s3c24xx_snd_device;
 178
 179 static int h1940_uda1380_init(struct snd_soc_pcm_runtime *rtd)
 180 {
 181         struct snd_soc_codec *codec = rtd->codec;
 182         struct snd_soc_dapm_context *dapm = &codec->dapm;
 183         int err;
 184
 185         /* Add h1940 specific widgets */
 186         err = snd_soc_dapm_new_controls(dapm, uda1380_dapm_widgets,
 187                                   ARRAY_SIZE(uda1380_dapm_widgets));
 188         if (err)
 189                 return err;
 190
 191         /* Set up h1940 specific audio path audio_mapnects */
 192         err = snd_soc_dapm_add_routes(dapm, audio_map,
 193                                       ARRAY_SIZE(audio_map));
 194         if (err)
 195                 return err;
 196
 197         snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
 198         snd_soc_dapm_enable_pin(dapm, "Speaker");
 199         snd_soc_dapm_enable_pin(dapm, "Mic Jack");
 200
 201         snd_soc_dapm_sync(dapm);
 202
 203         snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 204                 &hp_jack);
 205
 206         snd_soc_jack_add_pins(&hp_jack, ARRAY_SIZE(hp_jack_pins),
 207                 hp_jack_pins);
 208
 209         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 210                 hp_jack_gpios);
 211
 212         return 0;
 213 }
 214
 215 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
 216 static struct snd_soc_dai_link h1940_uda1380_dai[] = {
 217         {
 218                 .name           = "uda1380",
 219                 .stream_name    = "UDA1380 Duplex",
 220                 .cpu_dai_name   = "s3c24xx-iis",
 221                 .codec_dai_name = "uda1380-hifi",
 222                 .init           = h1940_uda1380_init,
 223                 .platform_name  = "samsung-audio",
 224                 .codec_name     = "uda1380-codec.0-001a",
 225                 .ops            = &h1940_ops,
 226         },
 227 };
 228
 229 static struct snd_soc_card h1940_asoc = {
 230         .name = "h1940",
 231         .dai_link = h1940_uda1380_dai,
 232         .num_links = ARRAY_SIZE(h1940_uda1380_dai),
 233 };
 234
 235 static int __init h1940_init(void)
 236 {
 237         int ret;
 238
 239         if (!machine_is_h1940())
 240                 return -ENODEV;
 241
 242         /* configure some gpios */
 243         ret = gpio_request(H1940_LATCH_AUDIO_POWER, "speaker-power");
 244         if (ret)
 245                 goto err_out;
 246
 247         ret = gpio_direction_output(H1940_LATCH_AUDIO_POWER, 0);
 248         if (ret)
 249                 goto err_gpio;
 250
 251         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
 252         if (!s3c24xx_snd_device) {
 253                 ret = -ENOMEM;
 254                 goto err_gpio;
 255         }
 256
 257         platform_set_drvdata(s3c24xx_snd_device, &h1940_asoc);
 258         ret = platform_device_add(s3c24xx_snd_device);
 259
 260         if (ret)
 261                 goto err_plat;
 262
 263         return 0;
 264
 265 err_plat:
 266         platform_device_put(s3c24xx_snd_device);
 267 err_gpio:
 268         gpio_free(H1940_LATCH_AUDIO_POWER);
 269
 270 err_out:
 271         return ret;
 272 }
 273
 274 static void __exit h1940_exit(void)
 275 {
 276         platform_device_unregister(s3c24xx_snd_device);
 277         snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 278                 hp_jack_gpios);
 279         gpio_free(H1940_LATCH_AUDIO_POWER);
 280 }
 281
 282 module_init(h1940_init);
 283 module_exit(h1940_exit);
 284
 285 /* Module information */
 286 MODULE_AUTHOR("Arnaud Patard, Vasily Khoruzhick");
 287 MODULE_DESCRIPTION("ALSA SoC H1940");
 288 MODULE_LICENSE("GPL");