sound/soc/s3c24xx/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/module.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/timer.h>
  23 #include <linux/delay.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/i2c.h>
  28 #include <linux/gpio.h>
  29 #include <linux/clk.h>
  30
  31 #include <sound/core.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/soc.h>
  35 #include <sound/soc-dapm.h>
  36 #include <sound/uda1380.h>
  37 #include <sound/jack.h>
  38
  39 #include <plat/regs-iis.h>
  40
  41 #include <mach/regs-clock.h>
  42
  43 #include <asm/mach-types.h>
  44
  45 #include "s3c-dma.h"
  46 #include "s3c24xx-i2s.h"
  47 #include "../codecs/uda1380.h"
  48
  49 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd);
  50 static int rx1950_startup(struct snd_pcm_substream *substream);
  51 static int rx1950_hw_params(struct snd_pcm_substream *substream,
  52                                 struct snd_pcm_hw_params *params);
  53 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
  54                                 struct snd_kcontrol *kcontrol, int event);
  55
  56 static unsigned int rates[] = {
  57         16000,
  58         44100,
  59         48000,
  60         88200,
  61 };
  62
  63 static struct snd_pcm_hw_constraint_list hw_rates = {
  64         .count = ARRAY_SIZE(rates),
  65         .list = rates,
  66         .mask = 0,
  67 };
  68
  69 static struct snd_soc_jack hp_jack;
  70
  71 static struct snd_soc_jack_pin hp_jack_pins[] = {
  72         {
  73                 .pin    = "Headphone Jack",
  74                 .mask   = SND_JACK_HEADPHONE,
  75         },
  76         {
  77                 .pin    = "Speaker",
  78                 .mask   = SND_JACK_HEADPHONE,
  79                 .invert = 1,
  80         },
  81 };
  82
  83 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
  84         [0] = {
  85                 .gpio                   = S3C2410_GPG(12),
  86                 .name                   = "hp-gpio",
  87                 .report                 = SND_JACK_HEADPHONE,
  88                 .invert                 = 1,
  89                 .debounce_time          = 200,
  90         },
  91 };
  92
  93 static struct snd_soc_ops rx1950_ops = {
  94         .startup        = rx1950_startup,
  95         .hw_params      = rx1950_hw_params,
  96 };
  97
  98 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
  99 static struct snd_soc_dai_link rx1950_uda1380_dai[] = {
 100         {
 101                 .name           = "uda1380",
 102                 .stream_name    = "UDA1380 Duplex",
 103                 .cpu_dai_name   = "s3c24xx-iis",
 104                 .codec_dai_name = "uda1380-hifi",
 105                 .init           = rx1950_uda1380_init,
 106                 .platform_name  = "s3c24xx-pcm-audio",
 107                 .codec_name     = "uda1380-codec.0-001a",
 108                 .ops            = &rx1950_ops,
 109         },
 110 };
 111
 112 static struct snd_soc_card rx1950_asoc = {
 113         .name = "rx1950",
 114         .dai_link = rx1950_uda1380_dai,
 115         .num_links = ARRAY_SIZE(rx1950_uda1380_dai),
 116 };
 117
 118 /* rx1950 machine dapm widgets */
 119 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
 120         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 121         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 122         SND_SOC_DAPM_SPK("Speaker", rx1950_spk_power),
 123 };
 124
 125 /* rx1950 machine audio_map */
 126 static const struct snd_soc_dapm_route audio_map[] = {
 127         /* headphone connected to VOUTLHP, VOUTRHP */
 128         {"Headphone Jack", NULL, "VOUTLHP"},
 129         {"Headphone Jack", NULL, "VOUTRHP"},
 130
 131         /* ext speaker connected to VOUTL, VOUTR  */
 132         {"Speaker", NULL, "VOUTL"},
 133         {"Speaker", NULL, "VOUTR"},
 134
 135         /* mic is connected to VINM */
 136         {"VINM", NULL, "Mic Jack"},
 137 };
 138
 139 static struct platform_device *s3c24xx_snd_device;
 140 static struct clk *xtal;
 141
 142 static int rx1950_startup(struct snd_pcm_substream *substream)
 143 {
 144         struct snd_pcm_runtime *runtime = substream->runtime;
 145
 146         runtime->hw.rate_min = hw_rates.list[0];
 147         runtime->hw.rate_max = hw_rates.list[hw_rates.count - 1];
 148         runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
 149
 150         return snd_pcm_hw_constraint_list(runtime, 0,
 151                                         SNDRV_PCM_HW_PARAM_RATE,
 152                                         &hw_rates);
 153 }
 154
 155 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
 156                                 struct snd_kcontrol *kcontrol, int event)
 157 {
 158         if (SND_SOC_DAPM_EVENT_ON(event))
 159                 gpio_set_value(S3C2410_GPA(1), 1);
 160         else
 161                 gpio_set_value(S3C2410_GPA(1), 0);
 162
 163         return 0;
 164 }
 165
 166 static int rx1950_hw_params(struct snd_pcm_substream *substream,
 167                                 struct snd_pcm_hw_params *params)
 168 {
 169         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 170         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 171         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 172         int div;
 173         int ret;
 174         unsigned int rate = params_rate(params);
 175         int clk_source, fs_mode;
 176
 177         switch (rate) {
 178         case 16000:
 179         case 48000:
 180                 clk_source = S3C24XX_CLKSRC_PCLK;
 181                 fs_mode = S3C2410_IISMOD_384FS;
 182                 div = s3c24xx_i2s_get_clockrate() / (384 * rate);
 183                 if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (182 * rate))
 184                         div++;
 185                 break;
 186         case 44100:
 187         case 88200:
 188                 clk_source = S3C24XX_CLKSRC_MPLL;
 189                 fs_mode = S3C2410_IISMOD_256FS;
 190                 div = clk_get_rate(xtal) / (256 * rate);
 191                 if (clk_get_rate(xtal) % (256 * rate) > (128 * rate))
 192                         div++;
 193                 break;
 194         default:
 195                 printk(KERN_ERR "%s: rate %d is not supported\n",
 196                         __func__, rate);
 197                 return -EINVAL;
 198         }
 199
 200         /* set codec DAI configuration */
 201         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 202                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 203         if (ret < 0)
 204                 return ret;
 205
 206         /* set cpu DAI configuration */
 207         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 208                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 209         if (ret < 0)
 210                 return ret;
 211
 212         /* select clock source */
 213         ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source, rate,
 214                         SND_SOC_CLOCK_OUT);
 215         if (ret < 0)
 216                 return ret;
 217
 218         /* set MCLK division for sample rate */
 219         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
 220                 S3C2410_IISMOD_384FS);
 221         if (ret < 0)
 222                 return ret;
 223
 224         /* set BCLK division for sample rate */
 225         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
 226                 S3C2410_IISMOD_32FS);
 227         if (ret < 0)
 228                 return ret;
 229
 230         /* set prescaler division for sample rate */
 231         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
 232                 S3C24XX_PRESCALE(div, div));
 233         if (ret < 0)
 234                 return ret;
 235
 236         return 0;
 237 }
 238
 239 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd)
 240 {
 241         struct snd_soc_codec *codec = rtd->codec;
 242         int err;
 243
 244         /* Add rx1950 specific widgets */
 245         err = snd_soc_dapm_new_controls(codec, uda1380_dapm_widgets,
 246                                   ARRAY_SIZE(uda1380_dapm_widgets));
 247
 248         if (err)
 249                 return err;
 250
 251         /* Set up rx1950 specific audio path audio_mapnects */
 252         err = snd_soc_dapm_add_routes(codec, audio_map,
 253                                       ARRAY_SIZE(audio_map));
 254
 255         if (err)
 256                 return err;
 257
 258         snd_soc_dapm_enable_pin(codec, "Headphone Jack");
 259         snd_soc_dapm_enable_pin(codec, "Speaker");
 260
 261         snd_soc_dapm_sync(codec);
 262
 263         snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 264                 &hp_jack);
 265
 266         snd_soc_jack_add_pins(&hp_jack, ARRAY_SIZE(hp_jack_pins),
 267                 hp_jack_pins);
 268
 269         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 270                 hp_jack_gpios);
 271
 272         return 0;
 273 }
 274
 275 static int __init rx1950_init(void)
 276 {
 277         int ret;
 278
 279         if (!machine_is_rx1950())
 280                 return -ENODEV;
 281
 282         /* configure some gpios */
 283         ret = gpio_request(S3C2410_GPA(1), "speaker-power");
 284         if (ret)
 285                 goto err_gpio;
 286
 287         ret = gpio_direction_output(S3C2410_GPA(1), 0);
 288         if (ret)
 289                 goto err_gpio_conf;
 290
 291         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
 292         if (!s3c24xx_snd_device) {
 293                 ret = -ENOMEM;
 294                 goto err_plat_alloc;
 295         }
 296
 297         platform_set_drvdata(s3c24xx_snd_device, &rx1950_asoc);
 298         ret = platform_device_add(s3c24xx_snd_device);
 299
 300         if (ret) {
 301                 platform_device_put(s3c24xx_snd_device);
 302                 goto err_plat_add;
 303         }
 304
 305         xtal = clk_get(&s3c24xx_snd_device->dev, "xtal");
 306
 307         if (IS_ERR(xtal)) {
 308                 ret = PTR_ERR(xtal);
 309                 platform_device_unregister(s3c24xx_snd_device);
 310                 goto err_clk;
 311         }
 312
 313         return 0;
 314
 315 err_clk:
 316 err_plat_add:
 317 err_plat_alloc:
 318 err_gpio_conf:
 319         gpio_free(S3C2410_GPA(1));
 320
 321 err_gpio:
 322         return ret;
 323 }
 324
 325 static void __exit rx1950_exit(void)
 326 {
 327         platform_device_unregister(s3c24xx_snd_device);
 328         snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
 329                 hp_jack_gpios);
 330         clk_put(xtal);
 331         gpio_free(S3C2410_GPA(1));
 332 }
 333
 334 module_init(rx1950_init);
 335 module_exit(rx1950_exit);
 336
 337 /* Module information */
 338 MODULE_AUTHOR("Vasily Khoruzhick");
 339 MODULE_DESCRIPTION("ALSA SoC RX1950");
 340 MODULE_LICENSE("GPL");