release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/ep93xx/snappercl15.c

   1 /*
   2  * snappercl15.c -- SoC audio for Bluewater Systems Snapper CL15 module
   3  *
   4  * Copyright (C) 2008 Bluewater Systems Ltd
   5  * Author: Ryan Mallon <ryan@bluewatersys.com>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  */
  13
  14 #include <linux/platform_device.h>
  15 #include <sound/core.h>
  16 #include <sound/pcm.h>
  17 #include <sound/soc.h>
  18 #include <sound/soc-dapm.h>
  19
  20 #include <asm/mach-types.h>
  21 #include <mach/hardware.h>
  22
  23 #include "../codecs/tlv320aic23.h"
  24 #include "ep93xx-pcm.h"
  25 #include "ep93xx-i2s.h"
  26
  27 #define CODEC_CLOCK 5644800
  28
  29 static int snappercl15_hw_params(struct snd_pcm_substream *substream,
  30                                  struct snd_pcm_hw_params *params)
  31 {
  32         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  33         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  34         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  35         int err;
  36
  37         err = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  38                                   SND_SOC_DAIFMT_NB_IF |
  39                                   SND_SOC_DAIFMT_CBS_CFS);
  40
  41         err = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  42                                   SND_SOC_DAIFMT_NB_IF |
  43                                   SND_SOC_DAIFMT_CBS_CFS);
  44         if (err)
  45                 return err;
  46
  47         err = snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK,
  48                                      SND_SOC_CLOCK_IN);
  49         if (err)
  50                 return err;
  51
  52         err = snd_soc_dai_set_sysclk(cpu_dai, 0, CODEC_CLOCK,
  53                                      SND_SOC_CLOCK_OUT);
  54         if (err)
  55                 return err;
  56
  57         return 0;
  58 }
  59
  60 static struct snd_soc_ops snappercl15_ops = {
  61         .hw_params      = snappercl15_hw_params,
  62 };
  63
  64 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
  65         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  66         SND_SOC_DAPM_LINE("Line In", NULL),
  67         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  68 };
  69
  70 static const struct snd_soc_dapm_route audio_map[] = {
  71         {"Headphone Jack", NULL, "LHPOUT"},
  72         {"Headphone Jack", NULL, "RHPOUT"},
  73
  74         {"LLINEIN", NULL, "Line In"},
  75         {"RLINEIN", NULL, "Line In"},
  76
  77         {"MICIN", NULL, "Mic Jack"},
  78 };
  79
  80 static int snappercl15_tlv320aic23_init(struct snd_soc_codec *codec)
  81 {
  82         snd_soc_dapm_new_controls(codec, tlv320aic23_dapm_widgets,
  83                                   ARRAY_SIZE(tlv320aic23_dapm_widgets));
  84
  85         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
  86         return 0;
  87 }
  88
  89 static struct snd_soc_dai_link snappercl15_dai = {
  90         .name           = "tlv320aic23",
  91         .stream_name    = "AIC23",
  92         .cpu_dai        = &ep93xx_i2s_dai,
  93         .codec_dai      = &tlv320aic23_dai,
  94         .init           = snappercl15_tlv320aic23_init,
  95         .ops            = &snappercl15_ops,
  96 };
  97
  98 static struct snd_soc_card snd_soc_snappercl15 = {
  99         .name           = "Snapper CL15",
 100         .platform       = &ep93xx_soc_platform,
 101         .dai_link       = &snappercl15_dai,
 102         .num_links      = 1,
 103 };
 104
 105 static struct snd_soc_device snappercl15_snd_devdata = {
 106         .card           = &snd_soc_snappercl15,
 107         .codec_dev      = &soc_codec_dev_tlv320aic23,
 108 };
 109
 110 static struct platform_device *snappercl15_snd_device;
 111
 112 static int __init snappercl15_init(void)
 113 {
 114         int ret;
 115
 116         if (!machine_is_snapper_cl15())
 117                 return -ENODEV;
 118
 119         ret = ep93xx_i2s_acquire(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 120                                  EP93XX_SYSCON_I2SCLKDIV_ORIDE |
 121                                  EP93XX_SYSCON_I2SCLKDIV_SPOL);
 122         if (ret)
 123                 return ret;
 124
 125         snappercl15_snd_device = platform_device_alloc("soc-audio", -1);
 126         if (!snappercl15_snd_device)
 127                 return -ENOMEM;
 128
 129         platform_set_drvdata(snappercl15_snd_device, &snappercl15_snd_devdata);
 130         snappercl15_snd_devdata.dev = &snappercl15_snd_device->dev;
 131         ret = platform_device_add(snappercl15_snd_device);
 132         if (ret)
 133                 platform_device_put(snappercl15_snd_device);
 134
 135         return ret;
 136 }
 137
 138 static void __exit snappercl15_exit(void)
 139 {
 140         platform_device_unregister(snappercl15_snd_device);
 141         ep93xx_i2s_release();
 142 }
 143
 144 module_init(snappercl15_init);
 145 module_exit(snappercl15_exit);
 146
 147 MODULE_AUTHOR("Ryan Mallon <ryan@bluewatersys.com>");
 148 MODULE_DESCRIPTION("ALSA SoC Snapper CL15");
 149 MODULE_LICENSE("GPL");