LXR linux/sound/soc/omap/omap2evm.c

   1/*
   2 * omap2evm.c  --  SoC audio machine driver for omap2evm board
   3 *
   4 * Author: Arun KS <arunks@mistralsolutions.com>
   5 *
   6 * Based on sound/soc/omap/overo.c by Steve Sakoman
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License
  10 * version 2 as published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful, but
  13 * WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 * General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20 * 02110-1301 USA
  21 *
  22 */
  23
  24#include <linux/clk.h>
  25#include <linux/platform_device.h>
  26#include <sound/core.h>
  27#include <sound/pcm.h>
  28#include <sound/soc.h>
  29#include <sound/soc-dapm.h>
  30
  31#include <asm/mach-types.h>
  32#include <mach/hardware.h>
  33#include <mach/gpio.h>
  34#include <mach/mcbsp.h>
  35
  36#include "omap-mcbsp.h"
  37#include "omap-pcm.h"
  38#include "../codecs/twl4030.h"
  39
  40static int omap2evm_hw_params(struct snd_pcm_substream *substream,
  41        struct snd_pcm_hw_params *params,
  42        struct snd_soc_dai *dai)
  43{
  44        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  45        struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  46        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  47        int ret;
  48
  49        /* Set codec DAI configuration */
  50        ret = snd_soc_dai_set_fmt(codec_dai,
  51                                  SND_SOC_DAIFMT_I2S |
  52                                  SND_SOC_DAIFMT_NB_NF |
  53                                  SND_SOC_DAIFMT_CBM_CFM);
  54        if (ret < 0) {
  55                printk(KERN_ERR "can't set codec DAI configuration\n");
  56                return ret;
  57        }
  58
  59        /* Set cpu DAI configuration */
  60        ret = snd_soc_dai_set_fmt(cpu_dai,
  61                                  SND_SOC_DAIFMT_I2S |
  62                                  SND_SOC_DAIFMT_NB_NF |
  63                                  SND_SOC_DAIFMT_CBM_CFM);
  64        if (ret < 0) {
  65                printk(KERN_ERR "can't set cpu DAI configuration\n");
  66                return ret;
  67        }
  68
  69        /* Set the codec system clock for DAC and ADC */
  70        ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  71                                            SND_SOC_CLOCK_IN);
  72        if (ret < 0) {
  73                printk(KERN_ERR "can't set codec system clock\n");
  74                return ret;
  75        }
  76
  77        return 0;
  78}
  79
  80static struct snd_soc_ops omap2evm_ops = {
  81        .hw_params = omap2evm_hw_params,
  82};
  83
  84/* Digital audio interface glue - connects codec <--> CPU */
  85static struct snd_soc_dai_link omap2evm_dai = {
  86        .name = "TWL4030",
  87        .stream_name = "TWL4030",
  88        .cpu_dai = &omap_mcbsp_dai[0],
  89        .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
  90        .ops = &omap2evm_ops,
  91};
  92
  93/* Audio machine driver */
  94static struct snd_soc_card snd_soc_omap2evm = {
  95        .name = "omap2evm",
  96        .platform = &omap_soc_platform,
  97        .dai_link = &omap2evm_dai,
  98        .num_links = 1,
  99};
 100
 101/* Audio subsystem */
 102static struct snd_soc_device omap2evm_snd_devdata = {
 103        .card = &snd_soc_omap2evm,
 104        .codec_dev = &soc_codec_dev_twl4030,
 105};
 106
 107static struct platform_device *omap2evm_snd_device;
 108
 109static int __init omap2evm_soc_init(void)
 110{
 111        int ret;
 112
 113        if (!machine_is_omap2evm()) {
 114                pr_debug("Not omap2evm!\n");
 115                return -ENODEV;
 116        }
 117        printk(KERN_INFO "omap2evm SoC init\n");
 118
 119        omap2evm_snd_device = platform_device_alloc("soc-audio", -1);
 120        if (!omap2evm_snd_device) {
 121                printk(KERN_ERR "Platform device allocation failed\n");
 122                return -ENOMEM;
 123        }
 124
 125        platform_set_drvdata(omap2evm_snd_device, &omap2evm_snd_devdata);
 126        omap2evm_snd_devdata.dev = &omap2evm_snd_device->dev;
 127        *(unsigned int *)omap2evm_dai.cpu_dai->private_data = 1; /* McBSP2 */
 128
 129        ret = platform_device_add(omap2evm_snd_device);
 130        if (ret)
 131                goto err1;
 132
 133        return 0;
 134
 135err1:
 136        printk(KERN_ERR "Unable to add platform device\n");
 137        platform_device_put(omap2evm_snd_device);
 138
 139        return ret;
 140}
 141module_init(omap2evm_soc_init);
 142
 143static void __exit omap2evm_soc_exit(void)
 144{
 145        platform_device_unregister(omap2evm_snd_device);
 146}
 147module_exit(omap2evm_soc_exit);
 148
 149MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
 150MODULE_DESCRIPTION("ALSA SoC omap2evm");
 151MODULE_LICENSE("GPL");
 152