sound/soc/omap/am3517evm.c

   1 /*
   2  * am3517evm.c  -- ALSA SoC support for OMAP3517 / AM3517 EVM
   3  *
   4  * Author: Anuj Aggarwal <anuj.aggarwal@ti.com>
   5  *
   6  * Based on sound/soc/omap/beagle.c by Steve Sakoman
   7  *
   8  * Copyright (C) 2009 Texas Instruments Incorporated
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the
  12  * Free Software Foundation version 2.
  13  *
  14  * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
  15  * whether express or implied; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17  * General Public License for more details.
  18  */
  19
  20 #include <linux/clk.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/module.h>
  23 #include <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/soc.h>
  26
  27 #include <asm/mach-types.h>
  28 #include <linux/platform_data/asoc-ti-mcbsp.h>
  29
  30 #include "omap-mcbsp.h"
  31 #include "omap-pcm.h"
  32
  33 #include "../codecs/tlv320aic23.h"
  34
  35 #define CODEC_CLOCK     12000000
  36
  37 static int am3517evm_hw_params(struct snd_pcm_substream *substream,
  38         struct snd_pcm_hw_params *params)
  39 {
  40         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  41         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  42         int ret;
  43
  44         /* Set the codec system clock for DAC and ADC */
  45         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
  46                         CODEC_CLOCK, SND_SOC_CLOCK_IN);
  47         if (ret < 0)
  48                 printk(KERN_ERR "can't set codec system clock\n");
  49
  50         return ret;
  51 }
  52
  53 static struct snd_soc_ops am3517evm_ops = {
  54         .hw_params = am3517evm_hw_params,
  55 };
  56
  57 /* am3517evm machine dapm widgets */
  58 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
  59         SND_SOC_DAPM_HP("Line Out", NULL),
  60         SND_SOC_DAPM_LINE("Line In", NULL),
  61         SND_SOC_DAPM_MIC("Mic In", NULL),
  62 };
  63
  64 static const struct snd_soc_dapm_route audio_map[] = {
  65         /* Line Out connected to LLOUT, RLOUT */
  66         {"Line Out", NULL, "LOUT"},
  67         {"Line Out", NULL, "ROUT"},
  68
  69         {"LLINEIN", NULL, "Line In"},
  70         {"RLINEIN", NULL, "Line In"},
  71
  72         {"MICIN", NULL, "Mic In"},
  73 };
  74
  75 /* Digital audio interface glue - connects codec <--> CPU */
  76 static struct snd_soc_dai_link am3517evm_dai = {
  77         .name = "TLV320AIC23",
  78         .stream_name = "AIC23",
  79         .cpu_dai_name = "omap-mcbsp.1",
  80         .codec_dai_name = "tlv320aic23-hifi",
  81         .platform_name = "omap-pcm-audio",
  82         .codec_name = "tlv320aic23-codec.2-001a",
  83         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
  84                    SND_SOC_DAIFMT_CBM_CFM,
  85         .ops = &am3517evm_ops,
  86 };
  87
  88 /* Audio machine driver */
  89 static struct snd_soc_card snd_soc_am3517evm = {
  90         .name = "am3517evm",
  91         .owner = THIS_MODULE,
  92         .dai_link = &am3517evm_dai,
  93         .num_links = 1,
  94
  95         .dapm_widgets = tlv320aic23_dapm_widgets,
  96         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
  97         .dapm_routes = audio_map,
  98         .num_dapm_routes = ARRAY_SIZE(audio_map),
  99 };
 100
 101 static struct platform_device *am3517evm_snd_device;
 102
 103 static int __init am3517evm_soc_init(void)
 104 {
 105         int ret;
 106
 107         if (!machine_is_omap3517evm())
 108                 return -ENODEV;
 109         pr_info("OMAP3517 / AM3517 EVM SoC init\n");
 110
 111         am3517evm_snd_device = platform_device_alloc("soc-audio", -1);
 112         if (!am3517evm_snd_device) {
 113                 printk(KERN_ERR "Platform device allocation failed\n");
 114                 return -ENOMEM;
 115         }
 116
 117         platform_set_drvdata(am3517evm_snd_device, &snd_soc_am3517evm);
 118
 119         ret = platform_device_add(am3517evm_snd_device);
 120         if (ret)
 121                 goto err1;
 122
 123         return 0;
 124
 125 err1:
 126         printk(KERN_ERR "Unable to add platform device\n");
 127         platform_device_put(am3517evm_snd_device);
 128
 129         return ret;
 130 }
 131
 132 static void __exit am3517evm_soc_exit(void)
 133 {
 134         platform_device_unregister(am3517evm_snd_device);
 135 }
 136
 137 module_init(am3517evm_soc_init);
 138 module_exit(am3517evm_soc_exit);
 139
 140 MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
 141 MODULE_DESCRIPTION("ALSA SoC OMAP3517 / AM3517 EVM");
 142 MODULE_LICENSE("GPL v2");