sound/soc/sdw_utils/soc_sdw_cs42l43.c

Source file repositories/reference/linux-study-clean/sound/soc/sdw_utils/soc_sdw_cs42l43.c

File Facts

System
Linux kernel
Corpus path
sound/soc/sdw_utils/soc_sdw_cs42l43.c
Extension
.c
Size
5362 bytes
Lines
173
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: exported/initcall integration point
Status
integration 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-only
// Based on sof_sdw_rt5682.c
// This file incorporates work covered by the following copyright notice:
// Copyright (c) 2023 Intel Corporation
// Copyright (c) 2024 Advanced Micro Devices, Inc.

/*
 *  soc_sdw_cs42l43 - Helpers to handle CS42L43 from generic machine driver
 */
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <sound/jack.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_type.h>
#include <sound/cs42l43.h>
#include <sound/control.h>
#include <sound/soc.h>
#include <sound/soc-acpi.h>
#include <sound/soc-dapm.h>
#include <sound/soc_sdw_utils.h>

#define CS42L43_SPK_VOLUME_0DB	128 /* 0dB Max */

static const struct snd_soc_dapm_route cs42l43_hs_map[] = {
	{ "Headphone", NULL, "cs42l43 AMP3_OUT" },
	{ "Headphone", NULL, "cs42l43 AMP4_OUT" },
	{ "cs42l43 ADC1_IN1_P", NULL, "Headset Mic" },
	{ "cs42l43 ADC1_IN1_N", NULL, "Headset Mic" },
};

static const struct snd_soc_dapm_route cs42l43_spk_map[] = {
	{ "Speaker", NULL, "cs42l43 AMP1_OUT_P", },
	{ "Speaker", NULL, "cs42l43 AMP1_OUT_N", },
	{ "Speaker", NULL, "cs42l43 AMP2_OUT_P", },
	{ "Speaker", NULL, "cs42l43 AMP2_OUT_N", },
};

static const struct snd_soc_dapm_route cs42l43_dmic_map[] = {
	{ "cs42l43 PDM1_DIN", NULL, "DMIC" },
	{ "cs42l43 PDM2_DIN", NULL, "DMIC" },
};

static struct snd_soc_jack_pin soc_jack_pins[] = {
	{
		.pin    = "Headphone",
		.mask   = SND_JACK_HEADPHONE | SND_JACK_LINEOUT,
	},
	{
		.pin    = "Headset Mic",
		.mask   = SND_JACK_MICROPHONE,
	},
};

int asoc_sdw_cs42l43_hs_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = snd_soc_rtd_to_codec(rtd, 0)->component;
	struct asoc_sdw_mc_private *ctx = snd_soc_card_get_drvdata(rtd->card);
	struct snd_soc_jack *jack = &ctx->sdw_headset;
	struct snd_soc_card *card = rtd->card;
	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
	int ret;

	card->components = devm_kasprintf(card->dev, GFP_KERNEL, "%s hs:cs42l43",
					  card->components);
	if (!card->components)
		return -ENOMEM;

	ret = snd_soc_dapm_add_routes(dapm, cs42l43_hs_map,
				      ARRAY_SIZE(cs42l43_hs_map));
	if (ret) {
		dev_err(card->dev, "cs42l43 hs map addition failed: %d\n", ret);
		return ret;
	}

	ret = snd_soc_card_jack_new_pins(card, "Jack",
					 SND_JACK_MECHANICAL | SND_JACK_AVOUT |
					 SND_JACK_HEADSET | SND_JACK_LINEOUT |
					 SND_JACK_BTN_0 | SND_JACK_BTN_1 |
					 SND_JACK_BTN_2 | SND_JACK_BTN_3,
					 jack, soc_jack_pins,
					 ARRAY_SIZE(soc_jack_pins));
	if (ret) {
		dev_err(card->dev, "Failed to create jack: %d\n", ret);
		return ret;
	}

	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP);

Annotation

Implementation Notes