drivers/soundwire/alc1308 : Add ALC1308 soundwire device

This patch adds new soundwire device ALC1308

The codec properties are filled out as best as possible
with the datasheet as a reference.

The ACPI address for the codec is calculated with the information in
the codec driver combined with the devicetree.cb hierarchy where the
link and unique IDs are extracted from the device path.

The unique ID is calculated from schematics by referring to ASEL[1:0]
strap settings. Datasheet of ALC1308 provides info about the mapping of
ASEL strap settings to unique ID

For example this device is connected to master link ID 1 and has strap
settings configuring it for unique ID 2.

chip drivers/soundwire/alc1308
  register "desc" = ""Left Speaker""
  device generic 1.2 on end
  end

Bug=None
Test=Build and boot on TGLRVP.Extract SSDT and confirm that the entries for
PCI0.HDAS.SNDW are present for ALC1308
Test speaker out functionality

Signed-off-by: Anil Kumar <anil.kumar.k@intel.com>
Change-Id: Ibf3f1d5c6881cbd106e96ad1ff17ca216aa272ac
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51042
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Sathyanarayana Nujella
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/soundwire/alc1308/Kconfig

@@ -0,0 +1,2 @@
+config DRIVERS_SOUNDWIRE_ALC1308
+	bool

src/drivers/soundwire/alc1308/Makefile.inc

@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_SOUNDWIRE_ALC1308) += alc1308.c

src/drivers/soundwire/alc1308/alc1308.c

@@ -0,0 +1,151 @@
+/* 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 alc1308_address = {
+	.version = SOUNDWIRE_VERSION_1_1,
+	.manufacturer_id = MIPI_MFG_ID_REALTEK,
+	.part_id = MIPI_DEV_ID_REALTEK_ALC1308,
+	.class = MIPI_CLASS_NONE
+};
+
+static struct soundwire_slave alc1308_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(2) | SOUNDWIRE_PORT(4),
+	.sink_port_list = SOUNDWIRE_PORT(1)
+};
+
+static struct soundwire_audio_mode alc1308_audio_mode = {
+	/* Bus frequency must be 1/2/4/8 divider of supported input frequencies. */
+	.bus_frequency_configs_count = 12,
+	.bus_frequency_configs = {
+		9600 * KHz,  4800 * KHz, 2400 * KHz, 1200 * KHz, /* 9.6 MHz */
+		12000 * KHz, 6000 * KHz, 3000 * KHz, 1500 * KHz,  /* 12 MHz */
+		12288 * KHz, 6144 * KHz, 3072 * KHz, 1536 * KHz  /* 12.288 MHz */
+	},
+	/* 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 alc1308_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 const struct soundwire_codec alc1308_codec = {
+	.slave = &alc1308_slave,
+	.audio_mode = { &alc1308_audio_mode },
+	.dpn = {
+		{
+			/* Data Input for Speaker Path */
+			.port = 1,
+			.sink = &alc1308_dp1
+		},
+		{
+			/* Data out for I.V sensing */
+			.port = 2,
+			.source = &alc1308_dp1
+		},
+		{
+			/* Data out for I.V sensing */
+			.port = 4,
+			.source = &alc1308_dp1
+		}
+	}
+
+};
+
+static void soundwire_alc1308_fill_ssdt(const struct device *dev)
+{
+	struct drivers_soundwire_alc1308_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. */
+	alc1308_address.link_id = dev->path.generic.id;
+	alc1308_address.unique_id = dev->path.generic.subid;
+
+	acpigen_write_ADR_soundwire_device(&alc1308_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, &alc1308_codec, NULL);
+	acpi_dp_write(dsd);
+
+	acpigen_pop_len(); /* Device */
+	acpigen_pop_len(); /* Scope */
+}
+
+static const char *soundwire_alc1308_acpi_name(const struct device *dev)
+{
+	struct drivers_soundwire_alc1308_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_alc1308_ops = {
+	.read_resources		= noop_read_resources,
+	.set_resources		= noop_set_resources,
+	.acpi_name		= soundwire_alc1308_acpi_name,
+	.acpi_fill_ssdt		= soundwire_alc1308_fill_ssdt,
+};
+
+static void soundwire_alc1308_enable(struct device *dev)
+{
+	dev->ops = &soundwire_alc1308_ops;
+}
+
+struct chip_operations drivers_soundwire_alc1308_ops = {
+	CHIP_NAME("Realtek ALC1308 SoundWire Codec")
+	.enable_dev = soundwire_alc1308_enable
+};

src/drivers/soundwire/alc1308/chip.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __DRIVERS_SOUNDWIRE_ALC1308_CHIP_H__
+#define __DRIVERS_SOUNDWIRE_ALC1308_CHIP_H__
+
+struct drivers_soundwire_alc1308_config {
+	const char *name;
+	const char *desc;
+};
+
+#endif /* __DRIVERS_SOUNDWIRE_ALC1308_CHIP_H__ */

src/include/device/mipi_ids.h

@@ -21,6 +21,7 @@
 #define MIPI_MFG_ID_REALTEK			0x025d
 #define MIPI_DEV_ID_REALTEK_ALC5682		0x5682
 #define MIPI_DEV_ID_REALTEK_ALC711		0x0711
+#define MIPI_DEV_ID_REALTEK_ALC1308             0x1308
 
 #define MIPI_MFG_ID_MAXIM			0x019f
 #define MIPI_DEV_ID_MAXIM_MAX98373		0x8373