ASoC: Adding OMAP3517 / AM3517 EVM support in ASOC

/*

 * 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");