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