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Linux/sound/soc/cirrus/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
  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 <linux/module.h>
 16 #include <sound/core.h>
 17 #include <sound/pcm.h>
 18 #include <sound/soc.h>
 19 
 20 #include <asm/mach-types.h>
 21 #include <mach/hardware.h>
 22 
 23 #include "../codecs/tlv320aic23.h"
 24 
 25 #define CODEC_CLOCK 5644800
 26 
 27 static int snappercl15_hw_params(struct snd_pcm_substream *substream,
 28                                  struct snd_pcm_hw_params *params)
 29 {
 30         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 31         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 32         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 33         int err;
 34 
 35         err = snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, 
 36                                      SND_SOC_CLOCK_IN);
 37         if (err)
 38                 return err;
 39 
 40         err = snd_soc_dai_set_sysclk(cpu_dai, 0, CODEC_CLOCK, 
 41                                      SND_SOC_CLOCK_OUT);
 42         if (err)
 43                 return err;
 44 
 45         return 0;
 46 }
 47 
 48 static struct snd_soc_ops snappercl15_ops = {
 49         .hw_params      = snappercl15_hw_params,
 50 };
 51 
 52 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 53         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 54         SND_SOC_DAPM_LINE("Line In", NULL),
 55         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 56 };
 57 
 58 static const struct snd_soc_dapm_route audio_map[] = {
 59         {"Headphone Jack", NULL, "LHPOUT"},
 60         {"Headphone Jack", NULL, "RHPOUT"},
 61 
 62         {"LLINEIN", NULL, "Line In"},
 63         {"RLINEIN", NULL, "Line In"},
 64 
 65         {"MICIN", NULL, "Mic Jack"},
 66 };
 67 
 68 static int snappercl15_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
 69 {
 70         struct snd_soc_codec *codec = rtd->codec;
 71         struct snd_soc_dapm_context *dapm = &codec->dapm;
 72 
 73         snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
 74                                   ARRAY_SIZE(tlv320aic23_dapm_widgets));
 75 
 76         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 77         return 0;
 78 }
 79 
 80 static struct snd_soc_dai_link snappercl15_dai = {
 81         .name           = "tlv320aic23",
 82         .stream_name    = "AIC23",
 83         .cpu_dai_name   = "ep93xx-i2s",
 84         .codec_dai_name = "tlv320aic23-hifi",
 85         .codec_name     = "tlv320aic23-codec.0-001a",
 86         .platform_name  = "ep93xx-i2s",
 87         .init           = snappercl15_tlv320aic23_init,
 88         .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
 89                           SND_SOC_DAIFMT_CBS_CFS,
 90         .ops            = &snappercl15_ops,
 91 };
 92 
 93 static struct snd_soc_card snd_soc_snappercl15 = {
 94         .name           = "Snapper CL15",
 95         .owner          = THIS_MODULE,
 96         .dai_link       = &snappercl15_dai,
 97         .num_links      = 1,
 98 };
 99 
100 static int snappercl15_probe(struct platform_device *pdev)
101 {
102         struct snd_soc_card *card = &snd_soc_snappercl15;
103         int ret;
104 
105         ret = ep93xx_i2s_acquire();
106         if (ret)
107                 return ret;
108 
109         card->dev = &pdev->dev;
110 
111         ret = snd_soc_register_card(card);
112         if (ret) {
113                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
114                         ret);
115                 ep93xx_i2s_release();
116         }
117 
118         return ret;
119 }
120 
121 static int snappercl15_remove(struct platform_device *pdev)
122 {
123         struct snd_soc_card *card = platform_get_drvdata(pdev);
124 
125         snd_soc_unregister_card(card);
126         ep93xx_i2s_release();
127 
128         return 0;
129 }
130 
131 static struct platform_driver snappercl15_driver = {
132         .driver         = {
133                 .name   = "snappercl15-audio",
134                 .owner  = THIS_MODULE,
135         },
136         .probe          = snappercl15_probe,
137         .remove         = snappercl15_remove,
138 };
139 
140 module_platform_driver(snappercl15_driver);
141 
142 MODULE_AUTHOR("Ryan Mallon");
143 MODULE_DESCRIPTION("ALSA SoC Snapper CL15");
144 MODULE_LICENSE("GPL");
145 MODULE_ALIAS("platform:snappercl15-audio");
146 

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