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   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/clk.h>
  16 #include <linux/gpio.h>
  17 #include <linux/io.h>
  18
  19 #include <sound/soc.h>
  20
  21 #include <mach/gpio-bank-d.h>
  22 #include <mach/gpio-bank-e.h>
  23 #include <plat/gpio-cfg.h>
  24
  25 #include <mach/map.h>
  26 #include <mach/dma.h>
  27
  28 #include "s3c-dma.h"
  29 #include "regs-i2s-v2.h"
  30 #include "s3c64xx-i2s.h"
  31
  32 /* The value should be set to maximum of the total number
  33  * of I2Sv3 controllers that any supported SoC has.
  34  */
  35 #define MAX_I2SV3       2
  36
  37 static struct s3c2410_dma_client s3c64xx_dma_client_out = {
  38         .name           = "I2S PCM Stereo out"
  39 };
  40
  41 static struct s3c2410_dma_client s3c64xx_dma_client_in = {
  42         .name           = "I2S PCM Stereo in"
  43 };
  44
  45 static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_out[MAX_I2SV3];
  46 static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_in[MAX_I2SV3];
  47 static struct s3c_i2sv2_info s3c64xx_i2s[MAX_I2SV3];
  48
  49 struct snd_soc_dai s3c64xx_i2s_dai[MAX_I2SV3];
  50 EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
  51
  52 static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
  53 {
  54         return cpu_dai->private_data;
  55 }
  56
  57 static int s3c64xx_i2s_probe(struct platform_device *pdev,
  58                              struct snd_soc_dai *dai)
  59 {
  60         /* configure GPIO for i2s port */
  61         switch (dai->id) {
  62         case 0:
  63                 s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK);
  64                 s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK);
  65                 s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK);
  66                 s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI);
  67                 s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0);
  68                 break;
  69         case 1:
  70                 s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK);
  71                 s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK);
  72                 s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK);
  73                 s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI);
  74                 s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0);
  75         }
  76
  77         return 0;
  78 }
  79
  80
  81 static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops;
  82
  83 static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev)
  84 {
  85         struct s3c_i2sv2_info *i2s;
  86         struct snd_soc_dai *dai;
  87         int ret;
  88
  89         if (pdev->id >= MAX_I2SV3) {
  90                 dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
  91                 return -EINVAL;
  92         }
  93
  94         i2s = &s3c64xx_i2s[pdev->id];
  95         dai = &s3c64xx_i2s_dai[pdev->id];
  96         dai->dev = &pdev->dev;
  97         dai->name = "s3c64xx-i2s";
  98         dai->id = pdev->id;
  99         dai->symmetric_rates = 1;
 100         dai->playback.channels_min = 2;
 101         dai->playback.channels_max = 2;
 102         dai->playback.rates = S3C64XX_I2S_RATES;
 103         dai->playback.formats = S3C64XX_I2S_FMTS;
 104         dai->capture.channels_min = 2;
 105         dai->capture.channels_max = 2;
 106         dai->capture.rates = S3C64XX_I2S_RATES;
 107         dai->capture.formats = S3C64XX_I2S_FMTS;
 108         dai->probe = s3c64xx_i2s_probe;
 109         dai->ops = &s3c64xx_i2s_dai_ops;
 110
 111         i2s->feature |= S3C_FEATURE_CDCLKCON;
 112
 113         i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
 114         i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
 115
 116         if (pdev->id == 0) {
 117                 i2s->dma_capture->channel = DMACH_I2S0_IN;
 118                 i2s->dma_capture->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD;
 119                 i2s->dma_playback->channel = DMACH_I2S0_OUT;
 120                 i2s->dma_playback->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD;
 121         } else {
 122                 i2s->dma_capture->channel = DMACH_I2S1_IN;
 123                 i2s->dma_capture->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD;
 124                 i2s->dma_playback->channel = DMACH_I2S1_OUT;
 125                 i2s->dma_playback->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISTXD;
 126         }
 127
 128         i2s->dma_capture->client = &s3c64xx_dma_client_in;
 129         i2s->dma_capture->dma_size = 4;
 130         i2s->dma_playback->client = &s3c64xx_dma_client_out;
 131         i2s->dma_playback->dma_size = 4;
 132
 133         i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
 134         if (IS_ERR(i2s->iis_cclk)) {
 135                 dev_err(&pdev->dev, "failed to get audio-bus\n");
 136                 ret = PTR_ERR(i2s->iis_cclk);
 137                 goto err;
 138         }
 139
 140         clk_enable(i2s->iis_cclk);
 141
 142         ret = s3c_i2sv2_probe(pdev, dai, i2s, 0);
 143         if (ret)
 144                 goto err_clk;
 145
 146         ret = s3c_i2sv2_register_dai(dai);
 147         if (ret != 0)
 148                 goto err_i2sv2;
 149
 150         return 0;
 151
 152 err_i2sv2:
 153         /* Not implemented for I2Sv2 core yet */
 154 err_clk:
 155         clk_put(i2s->iis_cclk);
 156 err:
 157         return ret;
 158 }
 159
 160 static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev)
 161 {
 162         dev_err(&pdev->dev, "Device removal not yet supported\n");
 163         return 0;
 164 }
 165
 166 static struct platform_driver s3c64xx_iis_driver = {
 167         .probe  = s3c64xx_iis_dev_probe,
 168         .remove = s3c64xx_iis_dev_remove,
 169         .driver = {
 170                 .name = "s3c64xx-iis",
 171                 .owner = THIS_MODULE,
 172         },
 173 };
 174
 175 static int __init s3c64xx_i2s_init(void)
 176 {
 177         return platform_driver_register(&s3c64xx_iis_driver);
 178 }
 179 module_init(s3c64xx_i2s_init);
 180
 181 static void __exit s3c64xx_i2s_exit(void)
 182 {
 183         platform_driver_unregister(&s3c64xx_iis_driver);
 184 }
 185 module_exit(s3c64xx_i2s_exit);
 186
 187 /* Module information */
 188 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
 189 MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
 190 MODULE_LICENSE("GPL");