kernel/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_uda1380_card_remove(struct snd_soc_card *card);
  35 static int rx1950_startup(struct snd_pcm_substream *substream);
  36 static int rx1950_hw_params(struct snd_pcm_substream *substream,
  37                                 struct snd_pcm_hw_params *params);
  38 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
  39                                 struct snd_kcontrol *kcontrol, int event);
  40
  41 static unsigned int rates[] = {
  42         16000,
  43         44100,
  44         48000,
  45 };
  46
  47 static struct snd_pcm_hw_constraint_list hw_rates = {
  48         .count = ARRAY_SIZE(rates),
  49         .list = rates,
  50         .mask = 0,
  51 };
  52
  53 static struct snd_soc_jack hp_jack;
  54
  55 static struct snd_soc_jack_pin hp_jack_pins[] = {
  56         {
  57                 .pin    = "Headphone Jack",
  58                 .mask   = SND_JACK_HEADPHONE,
  59         },
  60         {
  61                 .pin    = "Speaker",
  62                 .mask   = SND_JACK_HEADPHONE,
  63                 .invert = 1,
  64         },
  65 };
  66
  67 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
  68         [0] = {
  69                 .gpio                   = S3C2410_GPG(12),
  70                 .name                   = "hp-gpio",
  71                 .report                 = SND_JACK_HEADPHONE,
  72                 .invert                 = 1,
  73                 .debounce_time          = 200,
  74         },
  75 };
  76
  77 static struct snd_soc_ops rx1950_ops = {
  78         .startup        = rx1950_startup,
  79         .hw_params      = rx1950_hw_params,
  80 };
  81
  82 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
  83 static struct snd_soc_dai_link rx1950_uda1380_dai[] = {
  84         {
  85                 .name           = "uda1380",
  86                 .stream_name    = "UDA1380 Duplex",
  87                 .cpu_dai_name   = "s3c24xx-iis",
  88                 .codec_dai_name = "uda1380-hifi",
  89                 .init           = rx1950_uda1380_init,
  90                 .platform_name  = "s3c24xx-iis",
  91                 .codec_name     = "uda1380-codec.0-001a",
  92                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  93                                   SND_SOC_DAIFMT_CBS_CFS,
  94                 .ops            = &rx1950_ops,
  95         },
  96 };
  97
  98 /* rx1950 machine dapm widgets */
  99 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
 100         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 101         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 102         SND_SOC_DAPM_SPK("Speaker", rx1950_spk_power),
 103 };
 104
 105 /* rx1950 machine audio_map */
 106 static const struct snd_soc_dapm_route audio_map[] = {
 107         /* headphone connected to VOUTLHP, VOUTRHP */
 108         {"Headphone Jack", NULL, "VOUTLHP"},
 109         {"Headphone Jack", NULL, "VOUTRHP"},
 110
 111         /* ext speaker connected to VOUTL, VOUTR  */
 112         {"Speaker", NULL, "VOUTL"},
 113         {"Speaker", NULL, "VOUTR"},
 114
 115         /* mic is connected to VINM */
 116         {"VINM", NULL, "Mic Jack"},
 117 };
 118
 119 static struct snd_soc_card rx1950_asoc = {
 120         .name = "rx1950",
 121         .owner = THIS_MODULE,
 122         .remove = rx1950_uda1380_card_remove,
 123         .dai_link = rx1950_uda1380_dai,
 124         .num_links = ARRAY_SIZE(rx1950_uda1380_dai),
 125
 126         .dapm_widgets = uda1380_dapm_widgets,
 127         .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
 128         .dapm_routes = audio_map,
 129         .num_dapm_routes = ARRAY_SIZE(audio_map),
 130 };
 131
 132 static struct platform_device *s3c24xx_snd_device;
 133
 134 static int rx1950_startup(struct snd_pcm_substream *substream)
 135 {
 136         struct snd_pcm_runtime *runtime = substream->runtime;
 137
 138         return snd_pcm_hw_constraint_list(runtime, 0,
 139                                         SNDRV_PCM_HW_PARAM_RATE,
 140                                         &hw_rates);
 141 }
 142
 143 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
 144                                 struct snd_kcontrol *kcontrol, int event)
 145 {
 146         if (SND_SOC_DAPM_EVENT_ON(event))
 147                 gpio_set_value(S3C2410_GPA(1), 1);
 148         else
 149                 gpio_set_value(S3C2410_GPA(1), 0);
 150
 151         return 0;
 152 }
 153
 154 static int rx1950_hw_params(struct snd_pcm_substream *substream,
 155                                 struct snd_pcm_hw_params *params)
 156 {
 157         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 158         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 159         int div;
 160         int ret;
 161         unsigned int rate = params_rate(params);
 162         int clk_source, fs_mode;
 163
 164         switch (rate) {
 165         case 16000:
 166         case 48000:
 167                 clk_source = S3C24XX_CLKSRC_PCLK;
 168                 fs_mode = S3C2410_IISMOD_256FS;
 169                 div = s3c24xx_i2s_get_clockrate() / (256 * rate);
 170                 if (s3c24xx_i2s_get_clockrate() % (256 * rate) > (128 * rate))
 171                         div++;
 172                 break;
 173         case 44100:
 174         case 88200:
 175                 clk_source = S3C24XX_CLKSRC_MPLL;
 176                 fs_mode = S3C2410_IISMOD_384FS;
 177                 div = 1;
 178                 break;
 179         default:
 180                 printk(KERN_ERR "%s: rate %d is not supported\n",
 181                         __func__, rate);
 182                 return -EINVAL;
 183         }
 184
 185         /* select clock source */
 186         ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source, rate,
 187                         SND_SOC_CLOCK_OUT);
 188         if (ret < 0)
 189                 return ret;
 190
 191         /* set MCLK division for sample rate */
 192         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 193                 fs_mode);
 194         if (ret < 0)
 195                 return ret;
 196
 197         /* set BCLK division for sample rate */
 198         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
 199                 S3C2410_IISMOD_32FS);
 200         if (ret < 0)
 201                 return ret;
 202
 203         /* set prescaler division for sample rate */
 204         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 205                 S3C24XX_PRESCALE(div, div));
 206         if (ret < 0)
 207                 return ret;
 208
 209         return 0;
 210 }
 211
 212 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd)
 213 {
 214         snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
 215                 &hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
 216
 217         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 218                 hp_jack_gpios);
 219
 220         return 0;
 221 }
 222
 223 static int rx1950_uda1380_card_remove(struct snd_soc_card *card)
 224 {
 225         snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 226                 hp_jack_gpios);
 227
 228         return 0;
 229 }
 230
 231 static int __init rx1950_init(void)
 232 {
 233         int ret;
 234
 235         if (!machine_is_rx1950())
 236                 return -ENODEV;
 237
 238         /* configure some gpios */
 239         ret = gpio_request(S3C2410_GPA(1), "speaker-power");
 240         if (ret)
 241                 goto err_gpio;
 242
 243         ret = gpio_direction_output(S3C2410_GPA(1), 0);
 244         if (ret)
 245                 goto err_gpio_conf;
 246
 247         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
 248         if (!s3c24xx_snd_device) {
 249                 ret = -ENOMEM;
 250                 goto err_plat_alloc;
 251         }
 252
 253         platform_set_drvdata(s3c24xx_snd_device, &rx1950_asoc);
 254         ret = platform_device_add(s3c24xx_snd_device);
 255
 256         if (ret) {
 257                 platform_device_put(s3c24xx_snd_device);
 258                 goto err_plat_add;
 259         }
 260
 261         return 0;
 262
 263 err_plat_add:
 264 err_plat_alloc:
 265 err_gpio_conf:
 266         gpio_free(S3C2410_GPA(1));
 267
 268 err_gpio:
 269         return ret;
 270 }
 271
 272 static void __exit rx1950_exit(void)
 273 {
 274         platform_device_unregister(s3c24xx_snd_device);
 275         gpio_free(S3C2410_GPA(1));
 276 }
 277
 278 module_init(rx1950_init);
 279 module_exit(rx1950_exit);
 280
 281 /* Module information */
 282 MODULE_AUTHOR("Vasily Khoruzhick");
 283 MODULE_DESCRIPTION("ALSA SoC RX1950");
 284 MODULE_LICENSE("GPL");