Logo Search packages:      
Sourcecode: alsa-driver version File versions  Download package

am3517evm.c

/*
 * am3517evm.c  -- ALSA SoC support for OMAP3517 / AM3517 EVM
 *
 * Author: Anuj Aggarwal <anuj.aggarwal@ti.com>
 *
 * Based on sound/soc/omap/beagle.c by Steve Sakoman
 *
 * Copyright (C) 2009 Texas Instruments Incorporated
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
 * whether express or implied; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 */

#include <linux/clk.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/gpio.h>
#include <plat/mcbsp.h>

#include "omap-mcbsp.h"
#include "omap-pcm.h"

#include "../codecs/tlv320aic23.h"

#define CODEC_CLOCK     12000000

static int am3517evm_hw_params(struct snd_pcm_substream *substream,
      struct snd_pcm_hw_params *params)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
      struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
      int ret;

      /* Set codec DAI configuration */
      ret = snd_soc_dai_set_fmt(codec_dai,
                          SND_SOC_DAIFMT_DSP_B |
                          SND_SOC_DAIFMT_NB_NF |
                          SND_SOC_DAIFMT_CBM_CFM);
      if (ret < 0) {
            printk(KERN_ERR "can't set codec DAI configuration\n");
            return ret;
      }

      /* Set cpu DAI configuration */
      ret = snd_soc_dai_set_fmt(cpu_dai,
                          SND_SOC_DAIFMT_DSP_B |
                          SND_SOC_DAIFMT_NB_NF |
                          SND_SOC_DAIFMT_CBM_CFM);
      if (ret < 0) {
            printk(KERN_ERR "can't set cpu DAI configuration\n");
            return ret;
      }

      /* Set the codec system clock for DAC and ADC */
      ret = snd_soc_dai_set_sysclk(codec_dai, 0,
                  CODEC_CLOCK, SND_SOC_CLOCK_IN);
      if (ret < 0) {
            printk(KERN_ERR "can't set codec system clock\n");
            return ret;
      }

      ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_CLKR_SRC_CLKX, 0,
                        SND_SOC_CLOCK_IN);
      if (ret < 0) {
            printk(KERN_ERR "can't set CPU system clock OMAP_MCBSP_CLKR_SRC_CLKX\n");
            return ret;
      }

      snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_FSR_SRC_FSX, 0,
                        SND_SOC_CLOCK_IN);
      if (ret < 0) {
            printk(KERN_ERR "can't set CPU system clock OMAP_MCBSP_FSR_SRC_FSX\n");
            return ret;
      }

      return 0;
}

static struct snd_soc_ops am3517evm_ops = {
      .hw_params = am3517evm_hw_params,
};

/* am3517evm machine dapm widgets */
static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
      SND_SOC_DAPM_HP("Line Out", NULL),
      SND_SOC_DAPM_LINE("Line In", NULL),
      SND_SOC_DAPM_MIC("Mic In", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
      /* Line Out connected to LLOUT, RLOUT */
      {"Line Out", NULL, "LOUT"},
      {"Line Out", NULL, "ROUT"},

      {"LLINEIN", NULL, "Line In"},
      {"RLINEIN", NULL, "Line In"},

      {"MICIN", NULL, "Mic In"},
};

static int am3517evm_aic23_init(struct snd_soc_codec *codec)
{
      /* Add am3517-evm specific widgets */
      snd_soc_dapm_new_controls(codec, tlv320aic23_dapm_widgets,
                          ARRAY_SIZE(tlv320aic23_dapm_widgets));

      /* Set up davinci-evm specific audio path audio_map */
      snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

      /* always connected */
      snd_soc_dapm_enable_pin(codec, "Line Out");
      snd_soc_dapm_enable_pin(codec, "Line In");
      snd_soc_dapm_enable_pin(codec, "Mic In");

      snd_soc_dapm_sync(codec);

      return 0;
}

/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link am3517evm_dai = {
      .name = "TLV320AIC23",
      .stream_name = "AIC23",
      .cpu_dai = &omap_mcbsp_dai[0],
      .codec_dai = &tlv320aic23_dai,
      .init = am3517evm_aic23_init,
      .ops = &am3517evm_ops,
};

/* Audio machine driver */
static struct snd_soc_card snd_soc_am3517evm = {
      .name = "am3517evm",
      .platform = &omap_soc_platform,
      .dai_link = &am3517evm_dai,
      .num_links = 1,
};

/* Audio subsystem */
static struct snd_soc_device am3517evm_snd_devdata = {
      .card = &snd_soc_am3517evm,
      .codec_dev = &soc_codec_dev_tlv320aic23,
};

static struct platform_device *am3517evm_snd_device;

static int __init am3517evm_soc_init(void)
{
      int ret;

      if (!machine_is_omap3517evm()) {
            pr_err("Not OMAP3517 / AM3517 EVM!\n");
            return -ENODEV;
      }
      pr_info("OMAP3517 / AM3517 EVM SoC init\n");

      am3517evm_snd_device = platform_device_alloc("soc-audio", -1);
      if (!am3517evm_snd_device) {
            printk(KERN_ERR "Platform device allocation failed\n");
            return -ENOMEM;
      }

      platform_set_drvdata(am3517evm_snd_device, &am3517evm_snd_devdata);
      am3517evm_snd_devdata.dev = &am3517evm_snd_device->dev;
      *(unsigned int *)am3517evm_dai.cpu_dai->private_data = 0; /* McBSP1 */

      ret = platform_device_add(am3517evm_snd_device);
      if (ret)
            goto err1;

      return 0;

err1:
      printk(KERN_ERR "Unable to add platform device\n");
      platform_device_put(am3517evm_snd_device);

      return ret;
}

static void __exit am3517evm_soc_exit(void)
{
      platform_device_unregister(am3517evm_snd_device);
}

module_init(am3517evm_soc_init);
module_exit(am3517evm_soc_exit);

MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
MODULE_DESCRIPTION("ALSA SoC OMAP3517 / AM3517 EVM");
MODULE_LICENSE("GPL v2");

Generated by  Doxygen 1.6.0   Back to index