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 const unsigned int rates[] = {
  30         11025,
  31         22050,
  32         44100,
  33 };
  34
  35 static const struct snd_pcm_hw_constraint_list hw_rates = {
  36         .count = ARRAY_SIZE(rates),
  37         .list = rates,
  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         return snd_pcm_hw_constraint_list(runtime, 0,
  69                                         SNDRV_PCM_HW_PARAM_RATE,
  70                                         &hw_rates);
  71 }
  72
  73 static int h1940_hw_params(struct snd_pcm_substream *substream,
  74                                 struct snd_pcm_hw_params *params)
  75 {
  76         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  77         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  78         int div;
  79         int ret;
  80         unsigned int rate = params_rate(params);
  81
  82         switch (rate) {
  83         case 11025:
  84         case 22050:
  85         case 44100:
  86                 div = s3c24xx_i2s_get_clockrate() / (384 * rate);
  87                 if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (192 * rate))
  88                         div++;
  89                 break;
  90         default:
  91                 dev_err(rtd->dev, "%s: rate %d is not supported\n",
  92                         __func__, rate);
  93                 return -EINVAL;
  94         }
  95
  96         /* select clock source */
  97         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_PCLK, rate,
  98                         SND_SOC_CLOCK_OUT);
  99         if (ret < 0)
 100                 return ret;
 101
 102         /* set MCLK division for sample rate */
 103         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 104                 S3C2410_IISMOD_384FS);
 105         if (ret < 0)
 106                 return ret;
 107
 108         /* set BCLK division for sample rate */
 109         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
 110                 S3C2410_IISMOD_32FS);
 111         if (ret < 0)
 112                 return ret;
 113
 114         /* set prescaler division for sample rate */
 115         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 116                 S3C24XX_PRESCALE(div, div));
 117         if (ret < 0)
 118                 return ret;
 119
 120         return 0;
 121 }
 122
 123 static struct snd_soc_ops h1940_ops = {
 124         .startup        = h1940_startup,
 125         .hw_params      = h1940_hw_params,
 126 };
 127
 128 static int h1940_spk_power(struct snd_soc_dapm_widget *w,
 129                                 struct snd_kcontrol *kcontrol, int event)
 130 {
 131         if (SND_SOC_DAPM_EVENT_ON(event))
 132                 gpio_set_value(S3C_GPIO_END + 9, 1);
 133         else
 134                 gpio_set_value(S3C_GPIO_END + 9, 0);
 135
 136         return 0;
 137 }
 138
 139 /* h1940 machine dapm widgets */
 140 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
 141         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 142         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 143         SND_SOC_DAPM_SPK("Speaker", h1940_spk_power),
 144 };
 145
 146 /* h1940 machine audio_map */
 147 static const struct snd_soc_dapm_route audio_map[] = {
 148         /* headphone connected to VOUTLHP, VOUTRHP */
 149         {"Headphone Jack", NULL, "VOUTLHP"},
 150         {"Headphone Jack", NULL, "VOUTRHP"},
 151
 152         /* ext speaker connected to VOUTL, VOUTR  */
 153         {"Speaker", NULL, "VOUTL"},
 154         {"Speaker", NULL, "VOUTR"},
 155
 156         /* mic is connected to VINM */
 157         {"VINM", NULL, "Mic Jack"},
 158 };
 159
 160 static struct platform_device *s3c24xx_snd_device;
 161
 162 static int h1940_uda1380_init(struct snd_soc_pcm_runtime *rtd)
 163 {
 164         snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
 165                 &hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
 166
 167         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 168                 hp_jack_gpios);
 169
 170         return 0;
 171 }
 172
 173 static int h1940_uda1380_card_remove(struct snd_soc_card *card)
 174 {
 175         snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 176                 hp_jack_gpios);
 177
 178         return 0;
 179 }
 180
 181 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
 182 static struct snd_soc_dai_link h1940_uda1380_dai[] = {
 183         {
 184                 .name           = "uda1380",
 185                 .stream_name    = "UDA1380 Duplex",
 186                 .cpu_dai_name   = "s3c24xx-iis",
 187                 .codec_dai_name = "uda1380-hifi",
 188                 .init           = h1940_uda1380_init,
 189                 .platform_name  = "s3c24xx-iis",
 190                 .codec_name     = "uda1380-codec.0-001a",
 191                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 192                                   SND_SOC_DAIFMT_CBS_CFS,
 193                 .ops            = &h1940_ops,
 194         },
 195 };
 196
 197 static struct snd_soc_card h1940_asoc = {
 198         .name = "h1940",
 199         .owner = THIS_MODULE,
 200         .remove = h1940_uda1380_card_remove,
 201         .dai_link = h1940_uda1380_dai,
 202         .num_links = ARRAY_SIZE(h1940_uda1380_dai),
 203
 204         .dapm_widgets = uda1380_dapm_widgets,
 205         .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
 206         .dapm_routes = audio_map,
 207         .num_dapm_routes = ARRAY_SIZE(audio_map),
 208 };
 209
 210 static int __init h1940_init(void)
 211 {
 212         int ret;
 213
 214         if (!machine_is_h1940())
 215                 return -ENODEV;
 216
 217         /* configure some gpios */
 218         ret = gpio_request(S3C_GPIO_END + 9, "speaker-power");
 219         if (ret)
 220                 goto err_out;
 221
 222         ret = gpio_direction_output(S3C_GPIO_END + 9, 0);
 223         if (ret)
 224                 goto err_gpio;
 225
 226         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
 227         if (!s3c24xx_snd_device) {
 228                 ret = -ENOMEM;
 229                 goto err_gpio;
 230         }
 231
 232         platform_set_drvdata(s3c24xx_snd_device, &h1940_asoc);
 233         ret = platform_device_add(s3c24xx_snd_device);
 234
 235         if (ret)
 236                 goto err_plat;
 237
 238         return 0;
 239
 240 err_plat:
 241         platform_device_put(s3c24xx_snd_device);
 242 err_gpio:
 243         gpio_free(S3C_GPIO_END + 9);
 244
 245 err_out:
 246         return ret;
 247 }
 248
 249 static void __exit h1940_exit(void)
 250 {
 251         platform_device_unregister(s3c24xx_snd_device);
 252         gpio_free(S3C_GPIO_END + 9);
 253 }
 254
 255 module_init(h1940_init);
 256 module_exit(h1940_exit);
 257
 258 /* Module information */
 259 MODULE_AUTHOR("Arnaud Patard, Vasily Khoruzhick");
 260 MODULE_DESCRIPTION("ALSA SoC H1940");
 261 MODULE_LICENSE("GPL");