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
  32 #include "../codecs/tlv320aic23.h"
  33
  34 #define CODEC_CLOCK     12000000
  35
  36 static int am3517evm_hw_params(struct snd_pcm_substream *substream,
  37         struct snd_pcm_hw_params *params)
  38 {
  39         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  40         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  41         int ret;
  42
  43         /* Set the codec system clock for DAC and ADC */
  44         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
  45                         CODEC_CLOCK, SND_SOC_CLOCK_IN);
  46         if (ret < 0)
  47                 printk(KERN_ERR "can't set codec system clock\n");
  48
  49         return ret;
  50 }
  51
  52 static const struct snd_soc_ops am3517evm_ops = {
  53         .hw_params = am3517evm_hw_params,
  54 };
  55
  56 /* am3517evm machine dapm widgets */
  57 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
  58         SND_SOC_DAPM_HP("Line Out", NULL),
  59         SND_SOC_DAPM_LINE("Line In", NULL),
  60         SND_SOC_DAPM_MIC("Mic In", NULL),
  61 };
  62
  63 static const struct snd_soc_dapm_route audio_map[] = {
  64         /* Line Out connected to LLOUT, RLOUT */
  65         {"Line Out", NULL, "LOUT"},
  66         {"Line Out", NULL, "ROUT"},
  67
  68         {"LLINEIN", NULL, "Line In"},
  69         {"RLINEIN", NULL, "Line In"},
  70
  71         {"MICIN", NULL, "Mic In"},
  72 };
  73
  74 /* Digital audio interface glue - connects codec <--> CPU */
  75 static struct snd_soc_dai_link am3517evm_dai = {
  76         .name = "TLV320AIC23",
  77         .stream_name = "AIC23",
  78         .cpu_dai_name = "omap-mcbsp.1",
  79         .codec_dai_name = "tlv320aic23-hifi",
  80         .platform_name = "omap-mcbsp.1",
  81         .codec_name = "tlv320aic23-codec.2-001a",
  82         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
  83                    SND_SOC_DAIFMT_CBM_CFM,
  84         .ops = &am3517evm_ops,
  85 };
  86
  87 /* Audio machine driver */
  88 static struct snd_soc_card snd_soc_am3517evm = {
  89         .name = "am3517evm",
  90         .owner = THIS_MODULE,
  91         .dai_link = &am3517evm_dai,
  92         .num_links = 1,
  93
  94         .dapm_widgets = tlv320aic23_dapm_widgets,
  95         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
  96         .dapm_routes = audio_map,
  97         .num_dapm_routes = ARRAY_SIZE(audio_map),
  98 };
  99
 100 static struct platform_device *am3517evm_snd_device;
 101
 102 static int __init am3517evm_soc_init(void)
 103 {
 104         int ret;
 105
 106         if (!machine_is_omap3517evm())
 107                 return -ENODEV;
 108         pr_info("OMAP3517 / AM3517 EVM SoC init\n");
 109
 110         am3517evm_snd_device = platform_device_alloc("soc-audio", -1);
 111         if (!am3517evm_snd_device) {
 112                 printk(KERN_ERR "Platform device allocation failed\n");
 113                 return -ENOMEM;
 114         }
 115
 116         platform_set_drvdata(am3517evm_snd_device, &snd_soc_am3517evm);
 117
 118         ret = platform_device_add(am3517evm_snd_device);
 119         if (ret)
 120                 goto err1;
 121
 122         return 0;
 123
 124 err1:
 125         printk(KERN_ERR "Unable to add platform device\n");
 126         platform_device_put(am3517evm_snd_device);
 127
 128         return ret;
 129 }
 130
 131 static void __exit am3517evm_soc_exit(void)
 132 {
 133         platform_device_unregister(am3517evm_snd_device);
 134 }
 135
 136 module_init(am3517evm_soc_init);
 137 module_exit(am3517evm_soc_exit);
 138
 139 MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
 140 MODULE_DESCRIPTION("ALSA SoC OMAP3517 / AM3517 EVM");
 141 MODULE_LICENSE("GPL v2");