LXR linux/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 <asm/mach-types.h>
  26
  27#include "../codecs/tlv320aic23.h"
  28#include "imx-ssi.h"
  29
  30#define CODEC_CLOCK 12000000
  31
  32static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
  33                            struct snd_pcm_hw_params *params)
  34{
  35        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  36        struct snd_soc_dai *codec_dai = rtd->codec_dai;
  37        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  38        int ret;
  39
  40        ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  41                                  SND_SOC_DAIFMT_NB_NF |
  42                                  SND_SOC_DAIFMT_CBM_CFM);
  43        if (ret) {
  44                pr_err("%s: failed set cpu dai format\n", __func__);
  45                return ret;
  46        }
  47
  48        ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  49                                  SND_SOC_DAIFMT_NB_NF |
  50                                  SND_SOC_DAIFMT_CBM_CFM);
  51        if (ret) {
  52                pr_err("%s: failed set codec dai format\n", __func__);
  53                return ret;
  54        }
  55
  56        ret = snd_soc_dai_set_sysclk(codec_dai, 0,
  57                                     CODEC_CLOCK, SND_SOC_CLOCK_OUT);
  58        if (ret) {
  59                pr_err("%s: failed setting codec sysclk\n", __func__);
  60                return ret;
  61        }
  62        snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffc, 0xffffffc, 2, 0);
  63
  64        ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
  65                                SND_SOC_CLOCK_IN);
  66        if (ret) {
  67                pr_err("can't set CPU system clock IMX_SSP_SYS_CLK\n");
  68                return ret;
  69        }
  70
  71        return 0;
  72}
  73
  74static struct snd_soc_ops eukrea_tlv320_snd_ops = {
  75        .hw_params      = eukrea_tlv320_hw_params,
  76};
  77
  78static struct snd_soc_dai_link eukrea_tlv320_dai = {
  79        .name           = "tlv320aic23",
  80        .stream_name    = "TLV320AIC23",
  81        .codec_dai_name = "tlv320aic23-hifi",
  82        .platform_name  = "imx-fiq-pcm-audio.0",
  83        .codec_name     = "tlv320aic23-codec.0-001a",
  84        .cpu_dai_name   = "imx-ssi.0",
  85        .ops            = &eukrea_tlv320_snd_ops,
  86};
  87
  88static struct snd_soc_card eukrea_tlv320 = {
  89        .name           = "cpuimx-audio",
  90        .dai_link       = &eukrea_tlv320_dai,
  91        .num_links      = 1,
  92};
  93
  94static struct platform_device *eukrea_tlv320_snd_device;
  95
  96static int __init eukrea_tlv320_init(void)
  97{
  98        int ret;
  99
 100        if (!machine_is_eukrea_cpuimx27() && !machine_is_eukrea_cpuimx25sd()
 101                && !machine_is_eukrea_cpuimx35sd())
 102                /* return happy. We might run on a totally different machine */
 103                return 0;
 104
 105        eukrea_tlv320_snd_device = platform_device_alloc("soc-audio", -1);
 106        if (!eukrea_tlv320_snd_device)
 107                return -ENOMEM;
 108
 109        platform_set_drvdata(eukrea_tlv320_snd_device, &eukrea_tlv320);
 110        ret = platform_device_add(eukrea_tlv320_snd_device);
 111
 112        if (ret) {
 113                printk(KERN_ERR "ASoC: Platform device allocation failed\n");
 114                platform_device_put(eukrea_tlv320_snd_device);
 115        }
 116
 117        return ret;
 118}
 119
 120static void __exit eukrea_tlv320_exit(void)
 121{
 122        platform_device_unregister(eukrea_tlv320_snd_device);
 123}
 124
 125module_init(eukrea_tlv320_init);
 126module_exit(eukrea_tlv320_exit);
 127
 128MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
 129MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
 130MODULE_LICENSE("GPL");
 131