linux-kernel/linux-7.2.3/sound/soc/sdw_utils/soc_sdw_ti_amp.c

// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2025 Texas Instruments Inc.

/*
 *  soc_sdw_ti_amp - Helpers to handle TI's soundwire based codecs
 */

#include <linux/device.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <sound/jack.h>
#include <sound/soc-acpi.h>
#include <sound/soc-dai.h>
#include <sound/soc.h>
#include <sound/soc_sdw_utils.h>

#define TIAMP_SPK_VOLUME_0DB		200
#define TAC5XX2_WIDGET_NAME_MAX		32

int asoc_sdw_ti_amp_initial_settings(struct snd_soc_card *card,
				     const char *name_prefix)
{
	char *volume_ctl_name;
	int ret;

	volume_ctl_name = kasprintf(GFP_KERNEL, "%s Speaker Volume",
				    name_prefix);
	if (!volume_ctl_name)
		return -ENOMEM;

	ret = snd_soc_limit_volume(card, volume_ctl_name,
				   TIAMP_SPK_VOLUME_0DB);
	if (ret)
		dev_err(card->dev,
			"%s update failed %d\n",
			volume_ctl_name, ret);

	kfree(volume_ctl_name);
	return 0;
}
EXPORT_SYMBOL_NS(asoc_sdw_ti_amp_initial_settings, "SND_SOC_SDW_UTILS");

int asoc_sdw_ti_spk_rtd_init(struct snd_soc_pcm_runtime *rtd,
			     struct snd_soc_dai *dai)
{
	struct snd_soc_card *card = rtd->card;
	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
	char widget_name[16];
	char speaker[16];
	struct snd_soc_dapm_route route = {speaker, NULL, widget_name};
	struct snd_soc_dai *codec_dai;
	const char *prefix;
	int i, ret = 0;

	for_each_rtd_codec_dais(rtd, i, codec_dai) {
		if (!strstr(codec_dai->name, "tas2783"))
			continue;

		prefix = codec_dai->component->name_prefix;
		if (!strncmp(prefix, "tas2783-1", strlen("tas2783-1"))) {
			strscpy(speaker, "Left Spk", sizeof(speaker));
		} else if (!strncmp(prefix, "tas2783-2", strlen("tas2783-2"))) {
			strscpy(speaker, "Right Spk", sizeof(speaker));
		} else if (!strncmp(prefix, "tas2783-3", strlen("tas2783-3"))) {
			strscpy(speaker, "Left Spk2", sizeof(speaker));
		} else if (!strncmp(prefix, "tas2783-4", strlen("tas2783-4"))) {
			strscpy(speaker, "Right Spk2", sizeof(speaker));
		} else {
			ret = -EINVAL;
			dev_err(card->dev, "unhandled prefix %s", prefix);
			break;
		}

		snprintf(widget_name, sizeof(widget_name), "%s SPK", prefix);
		ret = asoc_sdw_ti_amp_initial_settings(card, prefix);
		if (ret)
			return ret;

		ret = snd_soc_dapm_add_routes(dapm, &route, 1);
		if (ret)
			return ret;
	}

	return ret;
}
EXPORT_SYMBOL_NS(asoc_sdw_ti_spk_rtd_init, "SND_SOC_SDW_UTILS");

int asoc_sdw_ti_amp_init(struct snd_soc_card *card,
			 struct snd_soc_dai_link *dai_links,
			 struct asoc_sdw_codec_info *info,
			 bool playback)
{
	if (!playback)
		return 0;

	info->amp_num++;

	return 0;
}
EXPORT_SYMBOL_NS(asoc_sdw_ti_amp_init, "SND_SOC_SDW_UTILS");

static int asoc_sdw_ti_add_tac5xx2_routes(struct snd_soc_dapm_context *dapm,
					  const char *name_prefix)
{
	struct snd_soc_dapm_route routes[2];
	char left_widget[TAC5XX2_WIDGET_NAME_MAX];
	char right_widget[TAC5XX2_WIDGET_NAME_MAX];

	if (strlen(name_prefix) > (TAC5XX2_WIDGET_NAME_MAX - 7))
		return -ENAMETOOLONG;

	scnprintf(left_widget, sizeof(left_widget), "%s SPK_L", name_prefix);
	scnprintf(right_widget, sizeof(right_widget), "%s SPK_R", name_prefix);

	routes[0] = (struct snd_soc_dapm_route){"Left Spk", NULL, left_widget};
	routes[1] = (struct snd_soc_dapm_route){"Right Spk", NULL, right_widget};

	return snd_soc_dapm_add_routes(dapm, routes, ARRAY_SIZE(routes));
}

int asoc_sdw_ti_tac5xx2_spk_rtd_init(struct snd_soc_pcm_runtime *rtd,
				     struct snd_soc_dai *dai)
{
	struct snd_soc_card *card = rtd->card;
	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
	int ret, i;
	struct snd_soc_dai *codec_dai;
	const char *prefix;

	for_each_rtd_codec_dais(rtd, i, codec_dai) {
		if (!strstr(codec_dai->name, "tac5") &&
		    !strstr(codec_dai->name, "tas2883"))
			continue;

		prefix = codec_dai->component->name_prefix;
		if (!prefix) {
			dev_warn(card->dev,
				 "No name prefix found for codec DAI: %s\n",
				codec_dai->name);
			continue;
		}
		ret = asoc_sdw_ti_add_tac5xx2_routes(dapm, prefix);
		if (ret) {
			dev_err(card->dev, "Failed to add routes for %s: %d\n",
				prefix, ret);
			return ret;
		}
	}

	dev_dbg(card->dev, "Added TAC5XX2 speaker routes\n");

	return 0;
}
EXPORT_SYMBOL_NS(asoc_sdw_ti_tac5xx2_spk_rtd_init, "SND_SOC_SDW_UTILS");

int asoc_sdw_ti_dmic_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai)
{
	struct snd_soc_card *card = rtd->card;
	struct snd_soc_component *component;

	component = dai->component;

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

	dev_dbg(card->dev, "card->components: %s\n", card->components);

	return 0;
}
EXPORT_SYMBOL_NS(asoc_sdw_ti_dmic_rtd_init, "SND_SOC_SDW_UTILS");

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

int asoc_sdw_ti_sdca_jack_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai)
{
	struct snd_soc_card *card = rtd->card;
	struct asoc_sdw_mc_private *ctx = snd_soc_card_get_drvdata(card);
	struct snd_soc_component *component;
	struct snd_soc_jack *jack;
	int ret;

	component = dai->component;

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

	ret = snd_soc_card_jack_new_pins(rtd->card, "Headset Jack",
					 SND_JACK_HEADSET | SND_JACK_BTN_0 |
						 SND_JACK_BTN_1 | SND_JACK_BTN_2 |
						 SND_JACK_BTN_3 | SND_JACK_BTN_4,
					&ctx->sdw_headset,
					ti_sdca_jack_pins,
					ARRAY_SIZE(ti_sdca_jack_pins));
	if (ret) {
		dev_err(rtd->card->dev, "Jack create failed%d\n", ret);
		return ret;
	}

	jack = &ctx->sdw_headset;

	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);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_4, KEY_NEXTSONG);

	ret = snd_soc_component_set_jack(component, jack, NULL);
	if (ret)
		dev_err(rtd->card->dev, "Headset Jack call-back failed: %d\n",
			ret);

	return ret;
}
EXPORT_SYMBOL_NS(asoc_sdw_ti_sdca_jack_rtd_init, "SND_SOC_SDW_UTILS");