4 files changed, 179 insertions, 0 deletions
diff --git a/src/drivers/soundwire/max98373/Kconfig b/src/drivers/soundwire/max98373/Kconfig
new file mode 100644
index 0000000000..0dc2c6116d
--- /dev/null
+++ b/src/drivers/soundwire/max98373/Kconfig
@@ -0,0 +1,2 @@
+config DRIVERS_SOUNDWIRE_MAX98373
+	bool
diff --git a/src/drivers/soundwire/max98373/Makefile.inc b/src/drivers/soundwire/max98373/Makefile.inc
new file mode 100644
index 0000000000..41c784d2ee
--- /dev/null
+++ b/src/drivers/soundwire/max98373/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_SOUNDWIRE_MAX98373) += max98373.c
diff --git a/src/drivers/soundwire/max98373/chip.h b/src/drivers/soundwire/max98373/chip.h
new file mode 100644
index 0000000000..c263577af5
--- /dev/null
+++ b/src/drivers/soundwire/max98373/chip.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __DRIVERS_SOUNDWIRE_MAX98373_CHIP_H__
+#define __DRIVERS_SOUNDWIRE_MAX98373_CHIP_H__
+
+struct drivers_soundwire_max98373_config {
+	const char *name;
+	const char *desc;
+};
+
+#endif /* __DRIVERS_SOUNDWIRE_MAX98373_CHIP_H__ */
diff --git a/src/drivers/soundwire/max98373/max98373.c b/src/drivers/soundwire/max98373/max98373.c
new file mode 100644
index 0000000000..231385cd57
--- /dev/null
+++ b/src/drivers/soundwire/max98373/max98373.c
@@ -0,0 +1,165 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpigen.h>
+#include <acpi/acpi_device.h>
+#include <acpi/acpi_soundwire.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <device/mipi_ids.h>
+#include <device/soundwire.h>
+#include <stdio.h>
+
+#include "chip.h"
+
+static struct soundwire_address max98373_address = {
+	.version = SOUNDWIRE_VERSION_1_1,
+	.manufacturer_id = MIPI_MFG_ID_MAXIM,
+	.part_id = MIPI_DEV_ID_MAXIM_MAX98373,
+	.class = MIPI_CLASS_NONE
+};
+
+static struct soundwire_slave max98373_slave = {
+	.wake_up_unavailable = false,
+	.test_mode_supported = false,
+	.clock_stop_mode1_supported = true,
+	.simplified_clockstopprepare_sm_supported = true,
+	.clockstopprepare_hard_reset_behavior = false,
+	.highPHY_capable = false,
+	.paging_supported = false,
+	.bank_delay_supported = false,
+	.port15_read_behavior = false,
+	.source_port_list = SOUNDWIRE_PORT(3),
+	.sink_port_list = SOUNDWIRE_PORT(1),
+};
+
+static struct soundwire_audio_mode max98373_audio_mode = {
+	/* Bus frequency must be 1/2/4/8 divider of supported input frequencies. */
+	.bus_frequency_configs_count = 27,
+	.bus_frequency_configs = {
+		7680 * KHz, 3840 * KHz, 1920 * KHz, 960 * KHz,   /* 7.68 MHz */
+		8400 * KHz, 4200 * KHz, 2100 * KHz, 1050 * KHz,  /* 8.4 MHz */
+		9600 * KHz, 4800 * KHz, 2400 * KHz, 1200 * KHz,  /* 9.6 MHz */
+		11289600, 5644800, 2822400, 1411200,             /* 11.2896 MHz */
+		12000 * KHz, 6000 * KHz, 3000 * KHz, 1500 * KHz, /* 12 MHz */
+		12288 * KHz, 6144 * KHz, 3072 * KHz, 1536 * KHz, /* 12.288 MHz */
+		13000 * KHz, 6500 * KHz, 3250 * KHz              /* 13 MHz (no /8) */
+	},
+	/* Support 16 KHz to 96 KHz sampling frequency */
+	.sampling_frequency_configs_count = 8,
+	.sampling_frequency_configs = {
+		16 * KHz,
+		22.05 * KHz,
+		24 * KHz,
+		32 * KHz,
+		44.1 * KHz,
+		48 * KHz,
+		88.2 * KHz,
+		96 * KHz,
+	},
+	.prepare_channel_behavior = CHANNEL_PREPARE_ANY_FREQUENCY
+};
+
+static struct soundwire_dpn max98373_dp1 = {
+	.port_wordlength_configs_count = 1,
+	.port_wordlength_configs = { 32 },
+	.data_port_type = FULL_DATA_PORT,
+	.max_grouping_supported = BLOCK_GROUP_COUNT_1,
+	.simplified_channelprepare_sm = false,
+	.imp_def_dpn_interrupts_supported = 0,
+	.min_channel_number = 1,
+	.max_channel_number = 2,
+	.modes_supported = MODE_ISOCHRONOUS | MODE_TX_CONTROLLED |
+			   MODE_RX_CONTROLLED | MODE_FULL_ASYNCHRONOUS,
+	.block_packing_mode = true,
+	.port_audio_mode_count = 1,
+	.port_audio_mode_list = { 0 }
+};
+
+static struct soundwire_dpn max98373_dp3 = {
+	.port_wordlength_configs_count = 1,
+	.port_wordlength_configs = { 16 },
+	.data_port_type = FULL_DATA_PORT,
+	.max_grouping_supported = BLOCK_GROUP_COUNT_1,
+	.simplified_channelprepare_sm = false,
+	.imp_def_dpn_interrupts_supported = 0,
+	.min_channel_number = 1,
+	.max_channel_number = 2,
+	.modes_supported = MODE_ISOCHRONOUS | MODE_TX_CONTROLLED |
+			   MODE_RX_CONTROLLED | MODE_FULL_ASYNCHRONOUS,
+	.block_packing_mode = true,
+	.port_audio_mode_count = 1,
+	.port_audio_mode_list = { 0 }
+};
+
+static const struct soundwire_codec max98373_codec = {
+	.slave = &max98373_slave,
+	.audio_mode = { &max98373_audio_mode },
+	.dpn = {
+		{
+			/* Data Input for Speaker Path */
+			.port = 1,
+			.sink = &max98373_dp1
+		},
+		{
+			/* Data Output for I/V Sense ADC Path */
+			.port = 3,
+			.source = &max98373_dp3,
+		}
+	}
+};
+
+static void soundwire_max98373_fill_ssdt(const struct device *dev)
+{
+	struct drivers_soundwire_max98373_config *config = dev->chip_info;
+	const char *scope = acpi_device_scope(dev);
+	struct acpi_dp *dsd;
+
+	if (!dev->enabled || !scope)
+		return;
+
+	acpigen_write_scope(scope);
+	acpigen_write_device(acpi_device_name(dev));
+
+	/* Set codec address IDs. */
+	max98373_address.link_id = dev->path.generic.id;
+	max98373_address.unique_id = dev->path.generic.subid;
+
+	acpigen_write_ADR_soundwire_device(&max98373_address);
+	acpigen_write_name_string("_DDN", config->desc ? : dev->chip_ops->name);
+	acpigen_write_STA(acpi_device_status(dev));
+
+	dsd = acpi_dp_new_table("_DSD");
+	soundwire_gen_codec(dsd, &max98373_codec, NULL);
+	acpi_dp_write(dsd);
+
+	acpigen_pop_len(); /* Device */
+	acpigen_pop_len(); /* Scope */
+}
+
+static const char *soundwire_max98373_acpi_name(const struct device *dev)
+{
+	struct drivers_soundwire_max98373_config *config = dev->chip_info;
+	static char name[5];
+
+	if (config->name)
+		return config->name;
+	snprintf(name, sizeof(name), "SW%1X%1X", dev->path.generic.id, dev->path.generic.subid);
+	return name;
+}
+
+static struct device_operations soundwire_max98373_ops = {
+	.read_resources		= noop_read_resources,
+	.set_resources		= noop_set_resources,
+	.acpi_name		= soundwire_max98373_acpi_name,
+	.acpi_fill_ssdt		= soundwire_max98373_fill_ssdt,
+};
+
+static void soundwire_max98373_enable(struct device *dev)
+{
+	dev->ops = &soundwire_max98373_ops;
+}
+
+struct chip_operations drivers_soundwire_max98373_ops = {
+	CHIP_NAME("Maxim MAX98373 SoundWire Codec")
+	.enable_dev = soundwire_max98373_enable
+};