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/gpio.h>
  17
  18 #include <sound/soc.h>
  19 #include <sound/jack.h>
  20
  21 #include <plat/regs-iis.h>
  22 #include <mach/h1940-latch.h>
  23 #include <asm/mach-types.h>
  24
  25 #include "s3c24xx-i2s.h"
  26
  27 static unsigned int rates[] = {
  28         11025,
  29         22050,
  30         44100,
  31 };
  32
  33 static struct snd_pcm_hw_constraint_list hw_rates = {
  34         .count = ARRAY_SIZE(rates),
  35         .list = rates,
  36         .mask = 0,
  37 };
  38
  39 static struct snd_soc_jack hp_jack;
  40
  41 static struct snd_soc_jack_pin hp_jack_pins[] = {
  42         {
  43                 .pin    = "Headphone Jack",
  44                 .mask   = SND_JACK_HEADPHONE,
  45         },
  46         {
  47                 .pin    = "Speaker",
  48                 .mask   = SND_JACK_HEADPHONE,
  49                 .invert = 1,
  50         },
  51 };
  52
  53 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
  54         {
  55                 .gpio                   = S3C2410_GPG(4),
  56                 .name                   = "hp-gpio",
  57                 .report                 = SND_JACK_HEADPHONE,
  58                 .invert                 = 1,
  59                 .debounce_time          = 200,
  60         },
  61 };
  62
  63 static int h1940_startup(struct snd_pcm_substream *substream)
  64 {
  65         struct snd_pcm_runtime *runtime = substream->runtime;
  66
  67         runtime->hw.rate_min = hw_rates.list[0];
  68         runtime->hw.rate_max = hw_rates.list[hw_rates.count - 1];
  69         runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
  70
  71         return snd_pcm_hw_constraint_list(runtime, 0,
  72                                         SNDRV_PCM_HW_PARAM_RATE,
  73                                         &hw_rates);
  74 }
  75
  76 static int h1940_hw_params(struct snd_pcm_substream *substream,
  77                                 struct snd_pcm_hw_params *params)
  78 {
  79         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  80         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  81         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  82         int div;
  83         int ret;
  84         unsigned int rate = params_rate(params);
  85
  86         switch (rate) {
  87         case 11025:
  88         case 22050:
  89         case 44100:
  90                 div = s3c24xx_i2s_get_clockrate() / (384 * rate);
  91                 if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (192 * rate))
  92                         div++;
  93                 break;
  94         default:
  95                 dev_err(&rtd->dev, "%s: rate %d is not supported\n",
  96                         __func__, rate);
  97                 return -EINVAL;
  98         }
  99
 100         /* set codec DAI configuration */
 101         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 102                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 103         if (ret < 0)
 104                 return ret;
 105
 106         /* set cpu DAI configuration */
 107         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 108                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 109         if (ret < 0)
 110                 return ret;
 111
 112         /* select clock source */
 113         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_PCLK, rate,
 114                         SND_SOC_CLOCK_OUT);
 115         if (ret < 0)
 116                 return ret;
 117
 118         /* set MCLK division for sample rate */
 119         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 120                 S3C2410_IISMOD_384FS);
 121         if (ret < 0)
 122                 return ret;
 123
 124         /* set BCLK division for sample rate */
 125         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
 126                 S3C2410_IISMOD_32FS);
 127         if (ret < 0)
 128                 return ret;
 129
 130         /* set prescaler division for sample rate */
 131         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 132                 S3C24XX_PRESCALE(div, div));
 133         if (ret < 0)
 134                 return ret;
 135
 136         return 0;
 137 }
 138
 139 static struct snd_soc_ops h1940_ops = {
 140         .startup        = h1940_startup,
 141         .hw_params      = h1940_hw_params,
 142 };
 143
 144 static int h1940_spk_power(struct snd_soc_dapm_widget *w,
 145                                 struct snd_kcontrol *kcontrol, int event)
 146 {
 147         if (SND_SOC_DAPM_EVENT_ON(event))
 148                 gpio_set_value(H1940_LATCH_AUDIO_POWER, 1);
 149         else
 150                 gpio_set_value(H1940_LATCH_AUDIO_POWER, 0);
 151
 152         return 0;
 153 }
 154
 155 /* h1940 machine dapm widgets */
 156 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
 157         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 158         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 159         SND_SOC_DAPM_SPK("Speaker", h1940_spk_power),
 160 };
 161
 162 /* h1940 machine audio_map */
 163 static const struct snd_soc_dapm_route audio_map[] = {
 164         /* headphone connected to VOUTLHP, VOUTRHP */
 165         {"Headphone Jack", NULL, "VOUTLHP"},
 166         {"Headphone Jack", NULL, "VOUTRHP"},
 167
 168         /* ext speaker connected to VOUTL, VOUTR  */
 169         {"Speaker", NULL, "VOUTL"},
 170         {"Speaker", NULL, "VOUTR"},
 171
 172         /* mic is connected to VINM */
 173         {"VINM", NULL, "Mic Jack"},
 174 };
 175
 176 static struct platform_device *s3c24xx_snd_device;
 177
 178 static int h1940_uda1380_init(struct snd_soc_pcm_runtime *rtd)
 179 {
 180         struct snd_soc_codec *codec = rtd->codec;
 181         struct snd_soc_dapm_context *dapm = &codec->dapm;
 182         int err;
 183
 184         /* Add h1940 specific widgets */
 185         err = snd_soc_dapm_new_controls(dapm, uda1380_dapm_widgets,
 186                                   ARRAY_SIZE(uda1380_dapm_widgets));
 187         if (err)
 188                 return err;
 189
 190         /* Set up h1940 specific audio path audio_mapnects */
 191         err = snd_soc_dapm_add_routes(dapm, audio_map,
 192                                       ARRAY_SIZE(audio_map));
 193         if (err)
 194                 return err;
 195
 196         snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
 197         snd_soc_dapm_enable_pin(dapm, "Speaker");
 198         snd_soc_dapm_enable_pin(dapm, "Mic Jack");
 199
 200         snd_soc_dapm_sync(dapm);
 201
 202         snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 203                 &hp_jack);
 204
 205         snd_soc_jack_add_pins(&hp_jack, ARRAY_SIZE(hp_jack_pins),
 206                 hp_jack_pins);
 207
 208         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 209                 hp_jack_gpios);
 210
 211         return 0;
 212 }
 213
 214 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
 215 static struct snd_soc_dai_link h1940_uda1380_dai[] = {
 216         {
 217                 .name           = "uda1380",
 218                 .stream_name    = "UDA1380 Duplex",
 219                 .cpu_dai_name   = "s3c24xx-iis",
 220                 .codec_dai_name = "uda1380-hifi",
 221                 .init           = h1940_uda1380_init,
 222                 .platform_name  = "samsung-audio",
 223                 .codec_name     = "uda1380-codec.0-001a",
 224                 .ops            = &h1940_ops,
 225         },
 226 };
 227
 228 static struct snd_soc_card h1940_asoc = {
 229         .name = "h1940",
 230         .dai_link = h1940_uda1380_dai,
 231         .num_links = ARRAY_SIZE(h1940_uda1380_dai),
 232 };
 233
 234 static int __init h1940_init(void)
 235 {
 236         int ret;
 237
 238         if (!machine_is_h1940())
 239                 return -ENODEV;
 240
 241         /* configure some gpios */
 242         ret = gpio_request(H1940_LATCH_AUDIO_POWER, "speaker-power");
 243         if (ret)
 244                 goto err_out;
 245
 246         ret = gpio_direction_output(H1940_LATCH_AUDIO_POWER, 0);
 247         if (ret)
 248                 goto err_gpio;
 249
 250         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
 251         if (!s3c24xx_snd_device) {
 252                 ret = -ENOMEM;
 253                 goto err_gpio;
 254         }
 255
 256         platform_set_drvdata(s3c24xx_snd_device, &h1940_asoc);
 257         ret = platform_device_add(s3c24xx_snd_device);
 258
 259         if (ret)
 260                 goto err_plat;
 261
 262         return 0;
 263
 264 err_plat:
 265         platform_device_put(s3c24xx_snd_device);
 266 err_gpio:
 267         gpio_free(H1940_LATCH_AUDIO_POWER);
 268
 269 err_out:
 270         return ret;
 271 }
 272
 273 static void __exit h1940_exit(void)
 274 {
 275         platform_device_unregister(s3c24xx_snd_device);
 276         snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 277                 hp_jack_gpios);
 278         gpio_free(H1940_LATCH_AUDIO_POWER);
 279 }
 280
 281 module_init(h1940_init);
 282 module_exit(h1940_exit);
 283
 284 /* Module information */
 285 MODULE_AUTHOR("Arnaud Patard, Vasily Khoruzhick");
 286 MODULE_DESCRIPTION("ALSA SoC H1940");
 287 MODULE_LICENSE("GPL");