sound/soc/samsung/smdk_wm8580pcm.c

   1 /*
   2  *  sound/soc/samsung/smdk_wm8580pcm.c
   3  *
   4  *  Copyright (c) 2011 Samsung Electronics Co. Ltd
   5  *
   6  *  This program is free software; you can redistribute  it and/or  modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  */
  11 #include <sound/soc.h>
  12 #include <sound/pcm_params.h>
  13 #include <sound/pcm.h>
  14
  15 #include <asm/mach-types.h>
  16
  17 #include "../codecs/wm8580.h"
  18 #include "dma.h"
  19 #include "pcm.h"
  20
  21 /*
  22  * Board Settings:
  23  *  o '1' means 'ON'
  24  *  o '0' means 'OFF'
  25  *  o 'X' means 'Don't care'
  26  *
  27  * SMDK6410, SMDK6440, SMDK6450 Base B/D: CFG1-0000, CFG2-1111
  28  * SMDKC110, SMDKV210: CFGB11-100100, CFGB12-0000
  29  */
  30
  31 #define SMDK_WM8580_EXT_OSC 12000000
  32 #define SMDK_WM8580_EXT_MCLK 4096000
  33 #define SMDK_WM8580_EXT_VOICE 2048000
  34
  35 static unsigned long mclk_freq;
  36 static unsigned long xtal_freq;
  37
  38 /*
  39  * If MCLK clock directly gets from XTAL, we don't have to use PLL
  40  * to make MCLK, but if XTAL clock source connects with other codec
  41  * pin (like XTI), we should have to set codec's PLL to make MCLK.
  42  * Because Samsung SoC does not support pcmcdclk output like I2S.
  43  */
  44
  45 static int smdk_wm8580_pcm_hw_params(struct snd_pcm_substream *substream,
  46                               struct snd_pcm_hw_params *params)
  47 {
  48         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  49         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  50         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  51         int rfs, ret;
  52
  53         switch (params_rate(params)) {
  54         case 8000:
  55                 break;
  56         default:
  57                 printk(KERN_ERR "%s:%d Sampling Rate %u not supported!\n",
  58                 __func__, __LINE__, params_rate(params));
  59                 return -EINVAL;
  60         }
  61
  62         rfs = mclk_freq / params_rate(params) / 2;
  63
  64         /* Set the codec DAI configuration */
  65         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B
  66                                 | SND_SOC_DAIFMT_IB_NF
  67                                 | SND_SOC_DAIFMT_CBS_CFS);
  68         if (ret < 0)
  69                 return ret;
  70
  71         /* Set the cpu DAI configuration */
  72         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_B
  73                                 | SND_SOC_DAIFMT_IB_NF
  74                                 | SND_SOC_DAIFMT_CBS_CFS);
  75         if (ret < 0)
  76                 return ret;
  77
  78         if (mclk_freq == xtal_freq) {
  79                 ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_MCLK,
  80                                                 mclk_freq, SND_SOC_CLOCK_IN);
  81                 if (ret < 0)
  82                         return ret;
  83
  84                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
  85                                                 WM8580_CLKSRC_MCLK);
  86                 if (ret < 0)
  87                         return ret;
  88         } else {
  89                 ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
  90                                                 mclk_freq, SND_SOC_CLOCK_IN);
  91                 if (ret < 0)
  92                         return ret;
  93
  94                 ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
  95                                                 WM8580_CLKSRC_PLLA);
  96                 if (ret < 0)
  97                         return ret;
  98
  99                 ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
 100                                                 xtal_freq, mclk_freq);
 101                 if (ret < 0)
 102                         return ret;
 103         }
 104
 105         /* Set PCM source clock on CPU */
 106         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
 107                                         mclk_freq, SND_SOC_CLOCK_IN);
 108         if (ret < 0)
 109                 return ret;
 110
 111         /* Set SCLK_DIV for making bclk */
 112         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
 113         if (ret < 0)
 114                 return ret;
 115
 116         return 0;
 117 }
 118
 119 static struct snd_soc_ops smdk_wm8580_pcm_ops = {
 120         .hw_params = smdk_wm8580_pcm_hw_params,
 121 };
 122
 123 static struct snd_soc_dai_link smdk_dai[] = {
 124         {
 125                 .name = "WM8580 PAIF PCM RX",
 126                 .stream_name = "Playback",
 127                 .cpu_dai_name = "samsung-pcm.0",
 128                 .codec_dai_name = "wm8580-hifi-playback",
 129                 .platform_name = "samsung-audio",
 130                 .codec_name = "wm8580-codec.0-001b",
 131                 .ops = &smdk_wm8580_pcm_ops,
 132         }, {
 133                 .name = "WM8580 PAIF PCM TX",
 134                 .stream_name = "Capture",
 135                 .cpu_dai_name = "samsung-pcm.0",
 136                 .codec_dai_name = "wm8580-hifi-capture",
 137                 .platform_name = "samsung-audio",
 138                 .codec_name = "wm8580-codec.0-001b",
 139                 .ops = &smdk_wm8580_pcm_ops,
 140         },
 141 };
 142
 143 static struct snd_soc_card smdk_pcm = {
 144         .name = "SMDK-PCM",
 145         .dai_link = smdk_dai,
 146         .num_links = 2,
 147 };
 148
 149 /*
 150  * After SMDKC110 Base Board's Rev is '0.1', 12MHz External OSC(X1)
 151  * is absent (or not connected), so we connect EXT_VOICE_CLK(OSC4),
 152  * 2.0484Mhz, directly with MCLK both Codec and SoC.
 153  */
 154 static int __devinit snd_smdk_probe(struct platform_device *pdev)
 155 {
 156         int ret = 0;
 157
 158         xtal_freq = SMDK_WM8580_EXT_OSC;
 159         mclk_freq = SMDK_WM8580_EXT_MCLK;
 160
 161         if (machine_is_smdkc110() || machine_is_smdkv210())
 162                 xtal_freq = mclk_freq = SMDK_WM8580_EXT_VOICE;
 163
 164         smdk_pcm.dev = &pdev->dev;
 165         ret = snd_soc_register_card(&smdk_pcm);
 166         if (ret) {
 167                 dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
 168                 return ret;
 169         }
 170
 171         return 0;
 172 }
 173
 174 static int __devexit snd_smdk_remove(struct platform_device *pdev)
 175 {
 176         snd_soc_unregister_card(&smdk_pcm);
 177         platform_set_drvdata(pdev, NULL);
 178         return 0;
 179 }
 180
 181 static struct platform_driver snd_smdk_driver = {
 182         .driver = {
 183                 .owner = THIS_MODULE,
 184                 .name = "samsung-smdk-pcm",
 185         },
 186         .probe = snd_smdk_probe,
 187         .remove = __devexit_p(snd_smdk_remove),
 188 };
 189
 190 static int __init smdk_audio_init(void)
 191 {
 192         return platform_driver_register(&snd_smdk_driver);
 193 }
 194
 195 module_init(smdk_audio_init);
 196
 197 static void __exit smdk_audio_exit(void)
 198 {
 199         platform_driver_unregister(&snd_smdk_driver);
 200 }
 201
 202 module_exit(smdk_audio_exit);
 203
 204 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
 205 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580 for PCM");
 206 MODULE_LICENSE("GPL");