LXR linux/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
  36static 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
  52static struct snd_soc_ops am3517evm_ops = {
  53        .hw_params = am3517evm_hw_params,
  54};
  55
  56/* am3517evm machine dapm widgets */
  57static 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
  63static 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 */
  75static 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-pcm-audio",
  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 */
  88static 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
 100static struct platform_device *am3517evm_snd_device;
 101
 102static 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
 124err1:
 125        printk(KERN_ERR "Unable to add platform device\n");
 126        platform_device_put(am3517evm_snd_device);
 127
 128        return ret;
 129}
 130
 131static void __exit am3517evm_soc_exit(void)
 132{
 133        platform_device_unregister(am3517evm_snd_device);
 134}
 135
 136module_init(am3517evm_soc_init);
 137module_exit(am3517evm_soc_exit);
 138
 139MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
 140MODULE_DESCRIPTION("ALSA SoC OMAP3517 / AM3517 EVM");
 141MODULE_LICENSE("GPL v2");
 142