sound/soc/samsung/rx1950_uda1380.c

   1 /*
   2  * rx1950.c  --  ALSA Soc Audio Layer
   3  *
   4  * Copyright (c) 2010 Vasily Khoruzhick <anarsoul@gmail.com>
   5  *
   6  * Based on smdk2440.c and magician.c
   7  *
   8  * Authors: Graeme Gregory graeme.gregory@wolfsonmicro.com
   9  *          Philipp Zabel <philipp.zabel@gmail.com>
  10  *          Denis Grigoriev <dgreenday@gmail.com>
  11  *          Vasily Khoruzhick <anarsoul@gmail.com>
  12  *
  13  *  This program is free software; you can redistribute  it and/or modify it
  14  *  under  the terms of  the GNU General  Public License as published by the
  15  *  Free Software Foundation;  either version 2 of the  License, or (at your
  16  *  option) any later version.
  17  *
  18  */
  19
  20 #include <linux/types.h>
  21 #include <linux/gpio.h>
  22 #include <linux/module.h>
  23
  24 #include <sound/soc.h>
  25 #include <sound/jack.h>
  26
  27 #include <mach/gpio-samsung.h>
  28 #include "regs-iis.h"
  29 #include <asm/mach-types.h>
  30
  31 #include "s3c24xx-i2s.h"
  32
  33 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd);
  34 static int rx1950_startup(struct snd_pcm_substream *substream);
  35 static int rx1950_hw_params(struct snd_pcm_substream *substream,
  36                                 struct snd_pcm_hw_params *params);
  37 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
  38                                 struct snd_kcontrol *kcontrol, int event);
  39
  40 static const unsigned int rates[] = {
  41         16000,
  42         44100,
  43         48000,
  44 };
  45
  46 static const struct snd_pcm_hw_constraint_list hw_rates = {
  47         .count = ARRAY_SIZE(rates),
  48         .list = rates,
  49 };
  50
  51 static struct snd_soc_jack hp_jack;
  52
  53 static struct snd_soc_jack_pin hp_jack_pins[] = {
  54         {
  55                 .pin    = "Headphone Jack",
  56                 .mask   = SND_JACK_HEADPHONE,
  57         },
  58         {
  59                 .pin    = "Speaker",
  60                 .mask   = SND_JACK_HEADPHONE,
  61                 .invert = 1,
  62         },
  63 };
  64
  65 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
  66         [0] = {
  67                 .gpio                   = S3C2410_GPG(12),
  68                 .name                   = "hp-gpio",
  69                 .report                 = SND_JACK_HEADPHONE,
  70                 .invert                 = 1,
  71                 .debounce_time          = 200,
  72         },
  73 };
  74
  75 static struct snd_soc_ops rx1950_ops = {
  76         .startup        = rx1950_startup,
  77         .hw_params      = rx1950_hw_params,
  78 };
  79
  80 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
  81 static struct snd_soc_dai_link rx1950_uda1380_dai[] = {
  82         {
  83                 .name           = "uda1380",
  84                 .stream_name    = "UDA1380 Duplex",
  85                 .cpu_dai_name   = "s3c24xx-iis",
  86                 .codec_dai_name = "uda1380-hifi",
  87                 .init           = rx1950_uda1380_init,
  88                 .platform_name  = "s3c24xx-iis",
  89                 .codec_name     = "uda1380-codec.0-001a",
  90                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  91                                   SND_SOC_DAIFMT_CBS_CFS,
  92                 .ops            = &rx1950_ops,
  93         },
  94 };
  95
  96 /* rx1950 machine dapm widgets */
  97 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
  98         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  99         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 100         SND_SOC_DAPM_SPK("Speaker", rx1950_spk_power),
 101 };
 102
 103 /* rx1950 machine audio_map */
 104 static const struct snd_soc_dapm_route audio_map[] = {
 105         /* headphone connected to VOUTLHP, VOUTRHP */
 106         {"Headphone Jack", NULL, "VOUTLHP"},
 107         {"Headphone Jack", NULL, "VOUTRHP"},
 108
 109         /* ext speaker connected to VOUTL, VOUTR  */
 110         {"Speaker", NULL, "VOUTL"},
 111         {"Speaker", NULL, "VOUTR"},
 112
 113         /* mic is connected to VINM */
 114         {"VINM", NULL, "Mic Jack"},
 115 };
 116
 117 static struct snd_soc_card rx1950_asoc = {
 118         .name = "rx1950",
 119         .owner = THIS_MODULE,
 120         .dai_link = rx1950_uda1380_dai,
 121         .num_links = ARRAY_SIZE(rx1950_uda1380_dai),
 122
 123         .dapm_widgets = uda1380_dapm_widgets,
 124         .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
 125         .dapm_routes = audio_map,
 126         .num_dapm_routes = ARRAY_SIZE(audio_map),
 127 };
 128
 129 static struct platform_device *s3c24xx_snd_device;
 130
 131 static int rx1950_startup(struct snd_pcm_substream *substream)
 132 {
 133         struct snd_pcm_runtime *runtime = substream->runtime;
 134
 135         return snd_pcm_hw_constraint_list(runtime, 0,
 136                                         SNDRV_PCM_HW_PARAM_RATE,
 137                                         &hw_rates);
 138 }
 139
 140 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
 141                                 struct snd_kcontrol *kcontrol, int event)
 142 {
 143         if (SND_SOC_DAPM_EVENT_ON(event))
 144                 gpio_set_value(S3C2410_GPA(1), 1);
 145         else
 146                 gpio_set_value(S3C2410_GPA(1), 0);
 147
 148         return 0;
 149 }
 150
 151 static int rx1950_hw_params(struct snd_pcm_substream *substream,
 152                                 struct snd_pcm_hw_params *params)
 153 {
 154         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 155         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 156         int div;
 157         int ret;
 158         unsigned int rate = params_rate(params);
 159         int clk_source, fs_mode;
 160
 161         switch (rate) {
 162         case 16000:
 163         case 48000:
 164                 clk_source = S3C24XX_CLKSRC_PCLK;
 165                 fs_mode = S3C2410_IISMOD_256FS;
 166                 div = s3c24xx_i2s_get_clockrate() / (256 * rate);
 167                 if (s3c24xx_i2s_get_clockrate() % (256 * rate) > (128 * rate))
 168                         div++;
 169                 break;
 170         case 44100:
 171         case 88200:
 172                 clk_source = S3C24XX_CLKSRC_MPLL;
 173                 fs_mode = S3C2410_IISMOD_384FS;
 174                 div = 1;
 175                 break;
 176         default:
 177                 printk(KERN_ERR "%s: rate %d is not supported\n",
 178                         __func__, rate);
 179                 return -EINVAL;
 180         }
 181
 182         /* select clock source */
 183         ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source, rate,
 184                         SND_SOC_CLOCK_OUT);
 185         if (ret < 0)
 186                 return ret;
 187
 188         /* set MCLK division for sample rate */
 189         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 190                 fs_mode);
 191         if (ret < 0)
 192                 return ret;
 193
 194         /* set BCLK division for sample rate */
 195         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
 196                 S3C2410_IISMOD_32FS);
 197         if (ret < 0)
 198                 return ret;
 199
 200         /* set prescaler division for sample rate */
 201         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 202                 S3C24XX_PRESCALE(div, div));
 203         if (ret < 0)
 204                 return ret;
 205
 206         return 0;
 207 }
 208
 209 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd)
 210 {
 211         snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
 212                 &hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
 213
 214         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 215                 hp_jack_gpios);
 216
 217         return 0;
 218 }
 219
 220 static int __init rx1950_init(void)
 221 {
 222         int ret;
 223
 224         if (!machine_is_rx1950())
 225                 return -ENODEV;
 226
 227         /* configure some gpios */
 228         ret = gpio_request(S3C2410_GPA(1), "speaker-power");
 229         if (ret)
 230                 goto err_gpio;
 231
 232         ret = gpio_direction_output(S3C2410_GPA(1), 0);
 233         if (ret)
 234                 goto err_gpio_conf;
 235
 236         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
 237         if (!s3c24xx_snd_device) {
 238                 ret = -ENOMEM;
 239                 goto err_plat_alloc;
 240         }
 241
 242         platform_set_drvdata(s3c24xx_snd_device, &rx1950_asoc);
 243         ret = platform_device_add(s3c24xx_snd_device);
 244
 245         if (ret) {
 246                 platform_device_put(s3c24xx_snd_device);
 247                 goto err_plat_add;
 248         }
 249
 250         return 0;
 251
 252 err_plat_add:
 253 err_plat_alloc:
 254 err_gpio_conf:
 255         gpio_free(S3C2410_GPA(1));
 256
 257 err_gpio:
 258         return ret;
 259 }
 260
 261 static void __exit rx1950_exit(void)
 262 {
 263         platform_device_unregister(s3c24xx_snd_device);
 264         gpio_free(S3C2410_GPA(1));
 265 }
 266
 267 module_init(rx1950_init);
 268 module_exit(rx1950_exit);
 269
 270 /* Module information */
 271 MODULE_AUTHOR("Vasily Khoruzhick");
 272 MODULE_DESCRIPTION("ALSA SoC RX1950");
 273 MODULE_LICENSE("GPL");