sound/soc/s3c24xx/s3c64xx-i2s.c

   1 /* sound/soc/s3c24xx/s3c64xx-i2s.c
   2  *
   3  * ALSA SoC Audio Layer - S3C64XX I2S driver
   4  *
   5  * Copyright 2008 Openmoko, Inc.
   6  * Copyright 2008 Simtec Electronics
   7  *      Ben Dooks <ben@simtec.co.uk>
   8  *      http://armlinux.simtec.co.uk/
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17 #include <linux/device.h>
  18 #include <linux/delay.h>
  19 #include <linux/clk.h>
  20 #include <linux/kernel.h>
  21 #include <linux/gpio.h>
  22 #include <linux/io.h>
  23
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include <sound/initval.h>
  28 #include <sound/soc.h>
  29
  30 #include <plat/regs-s3c2412-iis.h>
  31 #include <plat/gpio-bank-d.h>
  32 #include <plat/gpio-bank-e.h>
  33 #include <plat/gpio-cfg.h>
  34 #include <plat/audio.h>
  35
  36 #include <mach/map.h>
  37 #include <mach/dma.h>
  38
  39 #include "s3c24xx-pcm.h"
  40 #include "s3c64xx-i2s.h"
  41
  42 static struct s3c2410_dma_client s3c64xx_dma_client_out = {
  43         .name           = "I2S PCM Stereo out"
  44 };
  45
  46 static struct s3c2410_dma_client s3c64xx_dma_client_in = {
  47         .name           = "I2S PCM Stereo in"
  48 };
  49
  50 static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_out[2] = {
  51         [0] = {
  52                 .client         = &s3c64xx_dma_client_out,
  53                 .dma_addr       = S3C64XX_PA_IIS0 + S3C2412_IISTXD,
  54                 .dma_size       = 4,
  55         },
  56         [1] = {
  57                 .client         = &s3c64xx_dma_client_out,
  58                 .dma_addr       = S3C64XX_PA_IIS1 + S3C2412_IISTXD,
  59                 .dma_size       = 4,
  60         },
  61 };
  62
  63 static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in[2] = {
  64         [0] = {
  65                 .client         = &s3c64xx_dma_client_in,
  66                 .dma_addr       = S3C64XX_PA_IIS0 + S3C2412_IISRXD,
  67                 .dma_size       = 4,
  68         },
  69         [1] = {
  70                 .client         = &s3c64xx_dma_client_in,
  71                 .dma_addr       = S3C64XX_PA_IIS1 + S3C2412_IISRXD,
  72                 .dma_size       = 4,
  73         },
  74 };
  75
  76 static struct s3c_i2sv2_info s3c64xx_i2s[2];
  77
  78 static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
  79                                   int clk_id, unsigned int freq, int dir)
  80 {
  81         /* TODO */
  82         return 0;
  83 }
  84
  85 static int s3c64xx_i2s_probe(struct platform_device *pdev,
  86                              struct snd_soc_dai *dai)
  87 {
  88         struct device *dev = &pdev->dev;
  89         struct s3c_i2sv2_info *i2s;
  90         int ret;
  91
  92         dev_dbg(dev, "%s: probing dai %d\n", __func__, pdev->id);
  93
  94         if (pdev->id < 0 || pdev->id > ARRAY_SIZE(s3c64xx_i2s)) {
  95                 dev_err(dev, "id %d out of range\n", pdev->id);
  96                 return -EINVAL;
  97         }
  98
  99         i2s = &s3c64xx_i2s[pdev->id];
 100
 101         ret = s3c_i2sv2_probe(pdev, dai, i2s,
 102                               pdev->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0);
 103         if (ret)
 104                 return ret;
 105
 106         i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
 107         i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
 108
 109         i2s->iis_cclk = clk_get(dev, "i2sclk");
 110         if (i2s->iis_cclk == NULL) {
 111                 dev_err(dev, "failed to get i2sclk");
 112                 iounmap(i2s->regs);
 113                 return -ENODEV;
 114         }
 115
 116         /* configure GPIO for i2s port */
 117         switch (pdev->id) {
 118         case 0:
 119                 s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK);
 120                 s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK);
 121                 s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK);
 122                 s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI);
 123                 s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0);
 124                 break;
 125         case 1:
 126                 s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK);
 127                 s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK);
 128                 s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK);
 129                 s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI);
 130                 s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0);
 131         }
 132
 133         return 0;
 134 }
 135
 136
 137 #define S3C64XX_I2S_RATES \
 138         (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
 139         SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 140         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 141
 142 #define S3C64XX_I2S_FMTS \
 143         (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE)
 144
 145 struct snd_soc_dai s3c64xx_i2s_dai = {
 146         .name           = "s3c64xx-i2s",
 147         .id             = 0,
 148         .probe          = s3c64xx_i2s_probe,
 149         .playback = {
 150                 .channels_min   = 2,
 151                 .channels_max   = 2,
 152                 .rates          = S3C64XX_I2S_RATES,
 153                 .formats        = S3C64XX_I2S_FMTS,
 154         },
 155         .capture = {
 156                 .channels_min   = 2,
 157                 .channels_max   = 2,
 158                 .rates          = S3C64XX_I2S_RATES,
 159                 .formats        = S3C64XX_I2S_FMTS,
 160         },
 161         .ops = {
 162                 .set_sysclk     = s3c64xx_i2s_set_sysclk,
 163         },
 164 };
 165 EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
 166
 167 static int __init s3c64xx_i2s_init(void)
 168 {
 169         return  s3c_i2sv2_register_dai(&s3c64xx_i2s_dai);
 170 }
 171 module_init(s3c64xx_i2s_init);
 172
 173 static void __exit s3c64xx_i2s_exit(void)
 174 {
 175         snd_soc_unregister_dai(&s3c64xx_i2s_dai);
 176 }
 177 module_exit(s3c64xx_i2s_exit);
 178
 179 /* Module information */
 180 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
 181 MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
 182 MODULE_LICENSE("GPL");
 183
 184
 185