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 <plat/audio.h>
  20
  21 #include <mach/map.h>
  22 #include <mach/dma.h>
  23
  24 #include "s3c-dma.h"
  25 #include "regs-i2s-v2.h"
  26 #include "s3c64xx-i2s.h"
  27
  28 static struct s3c2410_dma_client s3c64xx_dma_client_out = {
  29         .name           = "I2Sv4 PCM Stereo out"
  30 };
  31
  32 static struct s3c2410_dma_client s3c64xx_dma_client_in = {
  33         .name           = "I2Sv4 PCM Stereo in"
  34 };
  35
  36 static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_out;
  37 static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_in;
  38 static struct s3c_i2sv2_info s3c64xx_i2sv4;
  39
  40 static int s3c64xx_i2sv4_probe(struct snd_soc_dai *dai)
  41 {
  42         struct s3c_i2sv2_info *i2s = &s3c64xx_i2sv4;
  43         int ret = 0;
  44
  45         snd_soc_dai_set_drvdata(dai, i2s);
  46
  47         ret = s3c_i2sv2_probe(dai, i2s, i2s->base);
  48
  49         return ret;
  50 }
  51
  52 static int s3c_i2sv4_hw_params(struct snd_pcm_substream *substream,
  53                                  struct snd_pcm_hw_params *params,
  54                                  struct snd_soc_dai *cpu_dai)
  55 {
  56         struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
  57         struct s3c_dma_params *dma_data;
  58         u32 iismod;
  59
  60         dev_dbg(cpu_dai->dev, "Entered %s\n", __func__);
  61
  62         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  63                 dma_data = i2s->dma_playback;
  64         else
  65                 dma_data = i2s->dma_capture;
  66
  67         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
  68
  69         iismod = readl(i2s->regs + S3C2412_IISMOD);
  70         dev_dbg(cpu_dai->dev, "%s: r: IISMOD: %x\n", __func__, iismod);
  71
  72         iismod &= ~S3C64XX_IISMOD_BLC_MASK;
  73         switch (params_format(params)) {
  74         case SNDRV_PCM_FORMAT_S8:
  75                 iismod |= S3C64XX_IISMOD_BLC_8BIT;
  76                 break;
  77         case SNDRV_PCM_FORMAT_S16_LE:
  78                 break;
  79         case SNDRV_PCM_FORMAT_S24_LE:
  80                 iismod |= S3C64XX_IISMOD_BLC_24BIT;
  81                 break;
  82         }
  83
  84         writel(iismod, i2s->regs + S3C2412_IISMOD);
  85         dev_dbg(cpu_dai->dev, "%s: w: IISMOD: %x\n", __func__, iismod);
  86
  87         return 0;
  88 }
  89
  90 static struct snd_soc_dai_ops s3c64xx_i2sv4_dai_ops = {
  91         .hw_params      = s3c_i2sv4_hw_params,
  92 };
  93
  94 static struct snd_soc_dai_driver s3c64xx_i2s_v4_dai = {
  95         .symmetric_rates = 1,
  96         .playback = {
  97                 .channels_min = 2,
  98                 .channels_max = 2,
  99                 .rates = S3C64XX_I2S_RATES,
 100                 .formats = S3C64XX_I2S_FMTS,
 101         },
 102         .capture = {
 103                 .channels_min = 2,
 104                 .channels_max = 2,
 105                 .rates = S3C64XX_I2S_RATES,
 106                 .formats = S3C64XX_I2S_FMTS,
 107         },
 108         .probe = s3c64xx_i2sv4_probe,
 109         .ops = &s3c64xx_i2sv4_dai_ops,
 110 };
 111
 112 static __devinit int s3c64xx_i2sv4_dev_probe(struct platform_device *pdev)
 113 {
 114         struct s3c_audio_pdata *i2s_pdata;
 115         struct s3c_i2sv2_info *i2s;
 116         struct resource *res;
 117         int ret;
 118
 119         i2s = &s3c64xx_i2sv4;
 120
 121         i2s->feature |= S3C_FEATURE_CDCLKCON;
 122
 123         i2s->dma_capture = &s3c64xx_i2sv4_pcm_stereo_in;
 124         i2s->dma_playback = &s3c64xx_i2sv4_pcm_stereo_out;
 125
 126         res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
 127         if (!res) {
 128                 dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
 129                 return -ENXIO;
 130         }
 131         i2s->dma_playback->channel = res->start;
 132
 133         res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
 134         if (!res) {
 135                 dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
 136                 return -ENXIO;
 137         }
 138         i2s->dma_capture->channel = res->start;
 139
 140         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 141         if (!res) {
 142                 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
 143                 return -ENXIO;
 144         }
 145
 146         if (!request_mem_region(res->start, resource_size(res),
 147                                 "s3c64xx-i2s-v4")) {
 148                 dev_err(&pdev->dev, "Unable to request SFR region\n");
 149                 return -EBUSY;
 150         }
 151         i2s->dma_capture->dma_addr = res->start + S3C2412_IISRXD;
 152         i2s->dma_playback->dma_addr = res->start + S3C2412_IISTXD;
 153
 154         i2s->dma_capture->client = &s3c64xx_dma_client_in;
 155         i2s->dma_capture->dma_size = 4;
 156         i2s->dma_playback->client = &s3c64xx_dma_client_out;
 157         i2s->dma_playback->dma_size = 4;
 158
 159         i2s->base = res->start;
 160
 161         i2s_pdata = pdev->dev.platform_data;
 162         if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
 163                 dev_err(&pdev->dev, "Unable to configure gpio\n");
 164                 return -EINVAL;
 165         }
 166
 167         i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
 168         if (IS_ERR(i2s->iis_cclk)) {
 169                 dev_err(&pdev->dev, "failed to get audio-bus\n");
 170                 ret = PTR_ERR(i2s->iis_cclk);
 171                 goto err;
 172         }
 173
 174         clk_enable(i2s->iis_cclk);
 175
 176         ret = s3c_i2sv2_register_dai(&pdev->dev, pdev->id, &s3c64xx_i2s_v4_dai);
 177         if (ret != 0)
 178                 goto err_i2sv2;
 179
 180         return 0;
 181
 182 err_i2sv2:
 183         clk_put(i2s->iis_cclk);
 184 err:
 185         return ret;
 186 }
 187
 188 static __devexit int s3c64xx_i2sv4_dev_remove(struct platform_device *pdev)
 189 {
 190         snd_soc_unregister_dai(&pdev->dev);
 191         return 0;
 192 }
 193
 194 static struct platform_driver s3c64xx_i2sv4_driver = {
 195         .probe  = s3c64xx_i2sv4_dev_probe,
 196         .remove = s3c64xx_i2sv4_dev_remove,
 197         .driver = {
 198                 .name = "s3c64xx-iis-v4",
 199                 .owner = THIS_MODULE,
 200         },
 201 };
 202
 203 static int __init s3c64xx_i2sv4_init(void)
 204 {
 205         return platform_driver_register(&s3c64xx_i2sv4_driver);
 206 }
 207 module_init(s3c64xx_i2sv4_init);
 208
 209 static void __exit s3c64xx_i2sv4_exit(void)
 210 {
 211         platform_driver_unregister(&s3c64xx_i2sv4_driver);
 212 }
 213 module_exit(s3c64xx_i2sv4_exit);
 214
 215 /* Module information */
 216 MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
 217 MODULE_DESCRIPTION("S3C64XX I2Sv4 SoC Interface");
 218 MODULE_LICENSE("GPL");
 219 MODULE_ALIAS("platform:s3c64xx-iis-v4");