release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/omap/omap3evm.c

   1 /*
   2  * omap3evm.c  -- ALSA SoC support for OMAP3 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) 2008 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 <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/soc.h>
  25 #include <sound/soc-dapm.h>
  26
  27 #include <asm/mach-types.h>
  28 #include <mach/hardware.h>
  29 #include <mach/gpio.h>
  30 #include <plat/mcbsp.h>
  31
  32 #include "omap-mcbsp.h"
  33 #include "omap-pcm.h"
  34 #include "../codecs/twl4030.h"
  35
  36 static int omap3evm_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->dai->codec_dai;
  41         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  42         int ret;
  43
  44         /* Set codec DAI configuration */
  45         ret = snd_soc_dai_set_fmt(codec_dai,
  46                                   SND_SOC_DAIFMT_I2S |
  47                                   SND_SOC_DAIFMT_NB_NF |
  48                                   SND_SOC_DAIFMT_CBM_CFM);
  49         if (ret < 0) {
  50                 printk(KERN_ERR "Can't set codec DAI configuration\n");
  51                 return ret;
  52         }
  53
  54         /* Set cpu DAI configuration */
  55         ret = snd_soc_dai_set_fmt(cpu_dai,
  56                                   SND_SOC_DAIFMT_I2S |
  57                                   SND_SOC_DAIFMT_NB_NF |
  58                                   SND_SOC_DAIFMT_CBM_CFM);
  59         if (ret < 0) {
  60                 printk(KERN_ERR "Can't set cpu DAI configuration\n");
  61                 return ret;
  62         }
  63
  64         /* Set the codec system clock for DAC and ADC */
  65         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  66                                      SND_SOC_CLOCK_IN);
  67         if (ret < 0) {
  68                 printk(KERN_ERR "Can't set codec system clock\n");
  69                 return ret;
  70         }
  71
  72         return 0;
  73 }
  74
  75 static struct snd_soc_ops omap3evm_ops = {
  76         .hw_params = omap3evm_hw_params,
  77 };
  78
  79 /* Digital audio interface glue - connects codec <--> CPU */
  80 static struct snd_soc_dai_link omap3evm_dai = {
  81         .name           = "TWL4030",
  82         .stream_name    = "TWL4030",
  83         .cpu_dai        = &omap_mcbsp_dai[0],
  84         .codec_dai      = &twl4030_dai[TWL4030_DAI_HIFI],
  85         .ops            = &omap3evm_ops,
  86 };
  87
  88 /* Audio machine driver */
  89 static struct snd_soc_card snd_soc_omap3evm = {
  90         .name = "omap3evm",
  91         .platform = &omap_soc_platform,
  92         .dai_link = &omap3evm_dai,
  93         .num_links = 1,
  94 };
  95
  96 /* twl4030 setup */
  97 static struct twl4030_setup_data twl4030_setup = {
  98         .ramp_delay_value = 4,
  99         .sysclk = 26000,
 100 };
 101
 102 /* Audio subsystem */
 103 static struct snd_soc_device omap3evm_snd_devdata = {
 104         .card = &snd_soc_omap3evm,
 105         .codec_dev = &soc_codec_dev_twl4030,
 106         .codec_data = &twl4030_setup,
 107 };
 108
 109 static struct platform_device *omap3evm_snd_device;
 110
 111 static int __init omap3evm_soc_init(void)
 112 {
 113         int ret;
 114
 115         if (!machine_is_omap3evm()) {
 116                 pr_err("Not OMAP3 EVM!\n");
 117                 return -ENODEV;
 118         }
 119         pr_info("OMAP3 EVM SoC init\n");
 120
 121         omap3evm_snd_device = platform_device_alloc("soc-audio", -1);
 122         if (!omap3evm_snd_device) {
 123                 printk(KERN_ERR "Platform device allocation failed\n");
 124                 return -ENOMEM;
 125         }
 126
 127         platform_set_drvdata(omap3evm_snd_device, &omap3evm_snd_devdata);
 128         omap3evm_snd_devdata.dev = &omap3evm_snd_device->dev;
 129         *(unsigned int *)omap3evm_dai.cpu_dai->private_data = 1;
 130
 131         ret = platform_device_add(omap3evm_snd_device);
 132         if (ret)
 133                 goto err1;
 134
 135         return 0;
 136
 137 err1:
 138         printk(KERN_ERR "Unable to add platform device\n");
 139         platform_device_put(omap3evm_snd_device);
 140
 141         return ret;
 142 }
 143
 144 static void __exit omap3evm_soc_exit(void)
 145 {
 146         platform_device_unregister(omap3evm_snd_device);
 147 }
 148
 149 module_init(omap3evm_soc_init);
 150 module_exit(omap3evm_soc_exit);
 151
 152 MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
 153 MODULE_DESCRIPTION("ALSA SoC OMAP3 EVM");
 154 MODULE_LICENSE("GPL v2");