sound/soc/kirkwood/armada-370-db.c

Source file repositories/reference/linux-study-clean/sound/soc/kirkwood/armada-370-db.c

File Facts

System
Linux kernel
Corpus path
sound/soc/kirkwood/armada-370-db.c
Extension
.c
Size
4095 bytes
Lines
157
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2014 Marvell
 *
 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <linux/of.h>
#include <linux/platform_data/asoc-kirkwood.h>
#include "../codecs/cs42l51.h"

static int a370db_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
	unsigned int freq;

	switch (params_rate(params)) {
	default:
	case 44100:
		freq = 11289600;
		break;
	case 48000:
		freq = 12288000;
		break;
	case 96000:
		freq = 24576000;
		break;
	}

	return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
}

static const struct snd_soc_ops a370db_ops = {
	.hw_params = a370db_hw_params,
};

static const struct snd_soc_dapm_widget a370db_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Out Jack", NULL),
	SND_SOC_DAPM_LINE("In Jack", NULL),
};

static const struct snd_soc_dapm_route a370db_route[] = {
	{ "Out Jack",	NULL,	"HPL" },
	{ "Out Jack",	NULL,	"HPR" },
	{ "AIN1L",	NULL,	"In Jack" },
	{ "AIN1L",	NULL,	"In Jack" },
};

SND_SOC_DAILINK_DEFS(analog,
	DAILINK_COMP_ARRAY(COMP_CPU("i2s")),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42l51-hifi")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

SND_SOC_DAILINK_DEFS(spdif_out,
	DAILINK_COMP_ARRAY(COMP_CPU("spdif")),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "dit-hifi")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

SND_SOC_DAILINK_DEFS(spdif_in,
	DAILINK_COMP_ARRAY(COMP_CPU("spdif")),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "dir-hifi")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

static struct snd_soc_dai_link a370db_dai[] = {
{
	.name = "CS42L51",
	.stream_name = "analog",
	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBC_CFC,
	.ops = &a370db_ops,
	SND_SOC_DAILINK_REG(analog),
},
{
	.name = "S/PDIF out",
	.stream_name = "spdif-out",
	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBC_CFC,
	SND_SOC_DAILINK_REG(spdif_out),
},
{
	.name = "S/PDIF in",
	.stream_name = "spdif-in",
	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBC_CFC,
	SND_SOC_DAILINK_REG(spdif_in),

Annotation

Implementation Notes