sound/soc/imx/eukrea-tlv320.c

   1 /*
   2  * eukrea-tlv320.c  --  SoC audio for eukrea_cpuimxXX in I2S mode
   3  *
   4  * Copyright 2010 Eric Bénard, Eukréa Electromatique <eric@eukrea.com>
   5  *
   6  * based on sound/soc/s3c24xx/s3c24xx_simtec_tlv320aic23.c
   7  * which is Copyright 2009 Simtec Electronics
   8  * and on sound/soc/imx/phycore-ac97.c which is
   9  * Copyright 2009 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
  10  *
  11  *  This program is free software; you can redistribute  it and/or modify it
  12  *  under  the terms of  the GNU General  Public License as published by the
  13  *  Free Software Foundation;  either version 2 of the  License, or (at your
  14  *  option) any later version.
  15  *
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/device.h>
  21 #include <linux/i2c.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/soc.h>
  25 #include <sound/soc-dapm.h>
  26 #include <asm/mach-types.h>
  27
  28 #include "../codecs/tlv320aic23.h"
  29 #include "imx-ssi.h"
  30
  31 #define CODEC_CLOCK 12000000
  32
  33 static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
  34                             struct snd_pcm_hw_params *params)
  35 {
  36         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  37         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  38         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  39         int ret;
  40
  41         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  42                                   SND_SOC_DAIFMT_NB_NF |
  43                                   SND_SOC_DAIFMT_CBM_CFM);
  44         if (ret) {
  45                 pr_err("%s: failed set cpu dai format\n", __func__);
  46                 return ret;
  47         }
  48
  49         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  50                                   SND_SOC_DAIFMT_NB_NF |
  51                                   SND_SOC_DAIFMT_CBM_CFM);
  52         if (ret) {
  53                 pr_err("%s: failed set codec dai format\n", __func__);
  54                 return ret;
  55         }
  56
  57         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
  58                                      CODEC_CLOCK, SND_SOC_CLOCK_OUT);
  59         if (ret) {
  60                 pr_err("%s: failed setting codec sysclk\n", __func__);
  61                 return ret;
  62         }
  63         snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffc, 0xffffffc, 2, 0);
  64
  65         ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
  66                                 SND_SOC_CLOCK_IN);
  67         if (ret) {
  68                 pr_err("can't set CPU system clock IMX_SSP_SYS_CLK\n");
  69                 return ret;
  70         }
  71
  72         return 0;
  73 }
  74
  75 static struct snd_soc_ops eukrea_tlv320_snd_ops = {
  76         .hw_params      = eukrea_tlv320_hw_params,
  77 };
  78
  79 static struct snd_soc_dai_link eukrea_tlv320_dai = {
  80         .name           = "tlv320aic23",
  81         .stream_name    = "TLV320AIC23",
  82         .codec_dai      = "tlv320aic23-hifi",
  83         .platform_name  = "imx-pcm-audio.0",
  84         .codec_name     = "tlv320aic23-codec.0-001a",
  85         .cpu_dai = "imx-ssi-dai.0",
  86         .ops            = &eukrea_tlv320_snd_ops,
  87 };
  88
  89 static struct snd_soc_card eukrea_tlv320 = {
  90         .name           = "cpuimx-audio",
  91         .dai_link       = &eukrea_tlv320_dai,
  92         .num_links      = 1,
  93 };
  94
  95 static struct platform_device *eukrea_tlv320_snd_device;
  96
  97 static int __init eukrea_tlv320_init(void)
  98 {
  99         int ret;
 100
 101         if (!machine_is_eukrea_cpuimx27() && !machine_is_eukrea_cpuimx25sd()
 102                 && !machine_is_eukrea_cpuimx35sd())
 103                 /* return happy. We might run on a totally different machine */
 104                 return 0;
 105
 106         eukrea_tlv320_snd_device = platform_device_alloc("soc-audio", -1);
 107         if (!eukrea_tlv320_snd_device)
 108                 return -ENOMEM;
 109
 110         platform_set_drvdata(eukrea_tlv320_snd_device, &eukrea_tlv320);
 111         ret = platform_device_add(eukrea_tlv320_snd_device);
 112
 113         if (ret) {
 114                 printk(KERN_ERR "ASoC: Platform device allocation failed\n");
 115                 platform_device_put(eukrea_tlv320_snd_device);
 116         }
 117
 118         return ret;
 119 }
 120
 121 static void __exit eukrea_tlv320_exit(void)
 122 {
 123         platform_device_unregister(eukrea_tlv320_snd_device);
 124 }
 125
 126 module_init(eukrea_tlv320_init);
 127 module_exit(eukrea_tlv320_exit);
 128
 129 MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
 130 MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
 131 MODULE_LICENSE("GPL");