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