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                 .channel        = DMACH_I2S0_OUT,
  53                 .client         = &s3c64xx_dma_client_out,
  54                 .dma_addr       = S3C64XX_PA_IIS0 + S3C2412_IISTXD,
  55                 .dma_size       = 4,
  56         },
  57         [1] = {
  58                 .channel        = DMACH_I2S1_OUT,
  59                 .client         = &s3c64xx_dma_client_out,
  60                 .dma_addr       = S3C64XX_PA_IIS1 + S3C2412_IISTXD,
  61                 .dma_size       = 4,
  62         },
  63 };
  64
  65 static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in[2] = {
  66         [0] = {
  67                 .channel        = DMACH_I2S0_IN,
  68                 .client         = &s3c64xx_dma_client_in,
  69                 .dma_addr       = S3C64XX_PA_IIS0 + S3C2412_IISRXD,
  70                 .dma_size       = 4,
  71         },
  72         [1] = {
  73                 .channel        = DMACH_I2S1_IN,
  74                 .client         = &s3c64xx_dma_client_in,
  75                 .dma_addr       = S3C64XX_PA_IIS1 + S3C2412_IISRXD,
  76                 .dma_size       = 4,
  77         },
  78 };
  79
  80 static struct s3c_i2sv2_info s3c64xx_i2s[2];
  81
  82 static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
  83 {
  84         return cpu_dai->private_data;
  85 }
  86
  87 static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
  88                                   int clk_id, unsigned int freq, int dir)
  89 {
  90         struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
  91         u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
  92
  93         switch (clk_id) {
  94         case S3C64XX_CLKSRC_PCLK:
  95                 iismod &= ~S3C64XX_IISMOD_IMS_SYSMUX;
  96                 break;
  97
  98         case S3C64XX_CLKSRC_MUX:
  99                 iismod |= S3C64XX_IISMOD_IMS_SYSMUX;
 100                 break;
 101
 102         default:
 103                 return -EINVAL;
 104         }
 105
 106         writel(iismod, i2s->regs + S3C2412_IISMOD);
 107
 108         return 0;
 109 }
 110
 111
 112 unsigned long s3c64xx_i2s_get_clockrate(struct snd_soc_dai *dai)
 113 {
 114         struct s3c_i2sv2_info *i2s = to_info(dai);
 115
 116         return clk_get_rate(i2s->iis_cclk);
 117 }
 118 EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clockrate);
 119
 120 static int s3c64xx_i2s_probe(struct platform_device *pdev,
 121                              struct snd_soc_dai *dai)
 122 {
 123         /* configure GPIO for i2s port */
 124         switch (dai->id) {
 125         case 0:
 126                 s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK);
 127                 s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK);
 128                 s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK);
 129                 s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI);
 130                 s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0);
 131                 break;
 132         case 1:
 133                 s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK);
 134                 s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK);
 135                 s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK);
 136                 s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI);
 137                 s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0);
 138         }
 139
 140         return 0;
 141 }
 142
 143
 144 #define S3C64XX_I2S_RATES \
 145         (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
 146         SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
 147         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 148
 149 #define S3C64XX_I2S_FMTS \
 150         (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE)
 151
 152 static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
 153         .set_sysclk     = s3c64xx_i2s_set_sysclk,
 154 };
 155
 156 struct snd_soc_dai s3c64xx_i2s_dai[] = {
 157         {
 158                 .name           = "s3c64xx-i2s",
 159                 .id             = 0,
 160                 .probe          = s3c64xx_i2s_probe,
 161                 .playback = {
 162                         .channels_min   = 2,
 163                         .channels_max   = 2,
 164                         .rates          = S3C64XX_I2S_RATES,
 165                         .formats        = S3C64XX_I2S_FMTS,
 166                 },
 167                 .capture = {
 168                          .channels_min  = 2,
 169                          .channels_max  = 2,
 170                          .rates         = S3C64XX_I2S_RATES,
 171                          .formats       = S3C64XX_I2S_FMTS,
 172                  },
 173                 .ops = &s3c64xx_i2s_dai_ops,
 174         },
 175         {
 176                 .name           = "s3c64xx-i2s",
 177                 .id             = 1,
 178                 .probe          = s3c64xx_i2s_probe,
 179                 .playback = {
 180                         .channels_min   = 2,
 181                         .channels_max   = 2,
 182                         .rates          = S3C64XX_I2S_RATES,
 183                         .formats        = S3C64XX_I2S_FMTS,
 184                 },
 185                 .capture = {
 186                          .channels_min  = 2,
 187                          .channels_max  = 2,
 188                          .rates         = S3C64XX_I2S_RATES,
 189                          .formats       = S3C64XX_I2S_FMTS,
 190                  },
 191                 .ops = &s3c64xx_i2s_dai_ops,
 192         },
 193 };
 194 EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
 195
 196 static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev)
 197 {
 198         struct s3c_i2sv2_info *i2s;
 199         struct snd_soc_dai *dai;
 200         int ret;
 201
 202         if (pdev->id >= ARRAY_SIZE(s3c64xx_i2s)) {
 203                 dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
 204                 return -EINVAL;
 205         }
 206
 207         i2s = &s3c64xx_i2s[pdev->id];
 208         dai = &s3c64xx_i2s_dai[pdev->id];
 209         dai->dev = &pdev->dev;
 210
 211         i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
 212         i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
 213
 214         i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
 215         if (IS_ERR(i2s->iis_cclk)) {
 216                 dev_err(&pdev->dev, "failed to get audio-bus");
 217                 ret = PTR_ERR(i2s->iis_cclk);
 218                 goto err;
 219         }
 220
 221         ret = s3c_i2sv2_probe(pdev, dai, i2s,
 222                               dai->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0);
 223         if (ret)
 224                 goto err_clk;
 225
 226         ret = snd_soc_register_dai(dai);
 227         if (ret != 0)
 228                 goto err_i2sv2;
 229
 230         return 0;
 231
 232 err_i2sv2:
 233         /* Not implemented for I2Sv2 core yet */
 234 err_clk:
 235         clk_put(i2s->iis_cclk);
 236 err:
 237         return ret;
 238 }
 239
 240 static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev)
 241 {
 242         dev_err(&pdev->dev, "Device removal not yet supported\n");
 243         return 0;
 244 }
 245
 246 static struct platform_driver s3c64xx_iis_driver = {
 247         .probe  = s3c64xx_iis_dev_probe,
 248         .remove = s3c64xx_iis_dev_remove,
 249         .driver = {
 250                 .name = "s3c64xx-iis",
 251                 .owner = THIS_MODULE,
 252         },
 253 };
 254
 255 static int __init s3c64xx_i2s_init(void)
 256 {
 257         return platform_driver_register(&s3c64xx_iis_driver);
 258 }
 259 module_init(s3c64xx_i2s_init);
 260
 261 static void __exit s3c64xx_i2s_exit(void)
 262 {
 263         platform_driver_unregister(&s3c64xx_iis_driver);
 264 }
 265 module_exit(s3c64xx_i2s_exit);
 266
 267 /* Module information */
 268 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
 269 MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
 270 MODULE_LICENSE("GPL");