release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/s3c24xx/s3c64xx-i2s-v4.c

   1 /* sound/soc/s3c24xx/s3c64xx-i2s-v4.c
   2  *
   3  * ALSA SoC Audio Layer - S3C64XX I2Sv4 driver
   4  * Copyright (c) 2010 Samsung Electronics Co. Ltd
   5  *      Author: Jaswinder Singh <jassi.brar@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/clk.h>
  13 #include <linux/gpio.h>
  14 #include <linux/io.h>
  15
  16 #include <sound/soc.h>
  17 #include <sound/pcm_params.h>
  18
  19 #include <mach/gpio-bank-c.h>
  20 #include <mach/gpio-bank-h.h>
  21 #include <plat/gpio-cfg.h>
  22
  23 #include <mach/map.h>
  24 #include <mach/dma.h>
  25
  26 #include "s3c-dma.h"
  27 #include "regs-i2s-v2.h"
  28 #include "s3c64xx-i2s.h"
  29
  30 static struct s3c2410_dma_client s3c64xx_dma_client_out = {
  31         .name           = "I2Sv4 PCM Stereo out"
  32 };
  33
  34 static struct s3c2410_dma_client s3c64xx_dma_client_in = {
  35         .name           = "I2Sv4 PCM Stereo in"
  36 };
  37
  38 static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_out;
  39 static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_in;
  40 static struct s3c_i2sv2_info s3c64xx_i2sv4;
  41
  42 struct snd_soc_dai s3c64xx_i2s_v4_dai;
  43 EXPORT_SYMBOL_GPL(s3c64xx_i2s_v4_dai);
  44
  45 static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
  46 {
  47         return cpu_dai->private_data;
  48 }
  49
  50 static int s3c64xx_i2sv4_probe(struct platform_device *pdev,
  51                              struct snd_soc_dai *dai)
  52 {
  53         /* configure GPIO for i2s port */
  54         s3c_gpio_cfgpin(S3C64XX_GPC(4), S3C64XX_GPC4_I2S_V40_DO0);
  55         s3c_gpio_cfgpin(S3C64XX_GPC(5), S3C64XX_GPC5_I2S_V40_DO1);
  56         s3c_gpio_cfgpin(S3C64XX_GPC(7), S3C64XX_GPC7_I2S_V40_DO2);
  57         s3c_gpio_cfgpin(S3C64XX_GPH(6), S3C64XX_GPH6_I2S_V40_BCLK);
  58         s3c_gpio_cfgpin(S3C64XX_GPH(7), S3C64XX_GPH7_I2S_V40_CDCLK);
  59         s3c_gpio_cfgpin(S3C64XX_GPH(8), S3C64XX_GPH8_I2S_V40_LRCLK);
  60         s3c_gpio_cfgpin(S3C64XX_GPH(9), S3C64XX_GPH9_I2S_V40_DI);
  61
  62         return 0;
  63 }
  64
  65 static int s3c_i2sv4_hw_params(struct snd_pcm_substream *substream,
  66                                  struct snd_pcm_hw_params *params,
  67                                  struct snd_soc_dai *cpu_dai)
  68 {
  69         struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
  70         struct s3c_dma_params *dma_data;
  71         u32 iismod;
  72
  73         dev_dbg(cpu_dai->dev, "Entered %s\n", __func__);
  74
  75         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  76                 dma_data = i2s->dma_playback;
  77         else
  78                 dma_data = i2s->dma_capture;
  79
  80         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
  81
  82         iismod = readl(i2s->regs + S3C2412_IISMOD);
  83         dev_dbg(cpu_dai->dev, "%s: r: IISMOD: %x\n", __func__, iismod);
  84
  85         iismod &= ~S3C64XX_IISMOD_BLC_MASK;
  86         switch (params_format(params)) {
  87         case SNDRV_PCM_FORMAT_S8:
  88                 iismod |= S3C64XX_IISMOD_BLC_8BIT;
  89                 break;
  90         case SNDRV_PCM_FORMAT_S16_LE:
  91                 break;
  92         case SNDRV_PCM_FORMAT_S24_LE:
  93                 iismod |= S3C64XX_IISMOD_BLC_24BIT;
  94                 break;
  95         }
  96
  97         writel(iismod, i2s->regs + S3C2412_IISMOD);
  98         dev_dbg(cpu_dai->dev, "%s: w: IISMOD: %x\n", __func__, iismod);
  99
 100         return 0;
 101 }
 102
 103 static struct snd_soc_dai_ops s3c64xx_i2sv4_dai_ops = {
 104         .hw_params      = s3c_i2sv4_hw_params,
 105 };
 106
 107 static __devinit int s3c64xx_i2sv4_dev_probe(struct platform_device *pdev)
 108 {
 109         struct s3c_i2sv2_info *i2s;
 110         struct snd_soc_dai *dai;
 111         int ret;
 112
 113         i2s = &s3c64xx_i2sv4;
 114         dai = &s3c64xx_i2s_v4_dai;
 115
 116         if (dai->dev) {
 117                 dev_dbg(dai->dev, "%s: \
 118                         I2Sv4 instance already registered!\n", __func__);
 119                 return -EBUSY;
 120         }
 121
 122         dai->dev = &pdev->dev;
 123         dai->name = "s3c64xx-i2s-v4";
 124         dai->id = 0;
 125         dai->symmetric_rates = 1;
 126         dai->playback.channels_min = 2;
 127         dai->playback.channels_max = 2;
 128         dai->playback.rates = S3C64XX_I2S_RATES;
 129         dai->playback.formats = S3C64XX_I2S_FMTS;
 130         dai->capture.channels_min = 2;
 131         dai->capture.channels_max = 2;
 132         dai->capture.rates = S3C64XX_I2S_RATES;
 133         dai->capture.formats = S3C64XX_I2S_FMTS;
 134         dai->probe = s3c64xx_i2sv4_probe;
 135         dai->ops = &s3c64xx_i2sv4_dai_ops;
 136
 137         i2s->feature |= S3C_FEATURE_CDCLKCON;
 138
 139         i2s->dma_capture = &s3c64xx_i2sv4_pcm_stereo_in;
 140         i2s->dma_playback = &s3c64xx_i2sv4_pcm_stereo_out;
 141
 142         i2s->dma_capture->channel = DMACH_HSI_I2SV40_RX;
 143         i2s->dma_capture->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISRXD;
 144         i2s->dma_playback->channel = DMACH_HSI_I2SV40_TX;
 145         i2s->dma_playback->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISTXD;
 146
 147         i2s->dma_capture->client = &s3c64xx_dma_client_in;
 148         i2s->dma_capture->dma_size = 4;
 149         i2s->dma_playback->client = &s3c64xx_dma_client_out;
 150         i2s->dma_playback->dma_size = 4;
 151
 152         i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
 153         if (IS_ERR(i2s->iis_cclk)) {
 154                 dev_err(&pdev->dev, "failed to get audio-bus\n");
 155                 ret = PTR_ERR(i2s->iis_cclk);
 156                 goto err;
 157         }
 158
 159         clk_enable(i2s->iis_cclk);
 160
 161         ret = s3c_i2sv2_probe(pdev, dai, i2s, 0);
 162         if (ret)
 163                 goto err_clk;
 164
 165         ret = s3c_i2sv2_register_dai(dai);
 166         if (ret != 0)
 167                 goto err_i2sv2;
 168
 169         return 0;
 170
 171 err_i2sv2:
 172         /* Not implemented for I2Sv2 core yet */
 173 err_clk:
 174         clk_put(i2s->iis_cclk);
 175 err:
 176         return ret;
 177 }
 178
 179 static __devexit int s3c64xx_i2sv4_dev_remove(struct platform_device *pdev)
 180 {
 181         dev_err(&pdev->dev, "Device removal not yet supported\n");
 182         return 0;
 183 }
 184
 185 static struct platform_driver s3c64xx_i2sv4_driver = {
 186         .probe  = s3c64xx_i2sv4_dev_probe,
 187         .remove = s3c64xx_i2sv4_dev_remove,
 188         .driver = {
 189                 .name = "s3c64xx-iis-v4",
 190                 .owner = THIS_MODULE,
 191         },
 192 };
 193
 194 static int __init s3c64xx_i2sv4_init(void)
 195 {
 196         return platform_driver_register(&s3c64xx_i2sv4_driver);
 197 }
 198 module_init(s3c64xx_i2sv4_init);
 199
 200 static void __exit s3c64xx_i2sv4_exit(void)
 201 {
 202         platform_driver_unregister(&s3c64xx_i2sv4_driver);
 203 }
 204 module_exit(s3c64xx_i2sv4_exit);
 205
 206 /* Module information */
 207 MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
 208 MODULE_DESCRIPTION("S3C64XX I2Sv4 SoC Interface");
 209 MODULE_LICENSE("GPL");