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-rw-r--r--src/drivers/intel/soundwire/Kconfig2
-rw-r--r--src/drivers/intel/soundwire/Makefile.inc1
-rw-r--r--src/drivers/intel/soundwire/chip.h9
-rw-r--r--src/drivers/intel/soundwire/soundwire.c100
-rw-r--r--src/drivers/intel/soundwire/soundwire.h43
5 files changed, 155 insertions, 0 deletions
diff --git a/src/drivers/intel/soundwire/Kconfig b/src/drivers/intel/soundwire/Kconfig
new file mode 100644
index 0000000000..fd6e3996a5
--- /dev/null
+++ b/src/drivers/intel/soundwire/Kconfig
@@ -0,0 +1,2 @@
+config DRIVERS_INTEL_SOUNDWIRE
+ bool
diff --git a/src/drivers/intel/soundwire/Makefile.inc b/src/drivers/intel/soundwire/Makefile.inc
new file mode 100644
index 0000000000..1f6773ec26
--- /dev/null
+++ b/src/drivers/intel/soundwire/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_INTEL_SOUNDWIRE) += soundwire.c
diff --git a/src/drivers/intel/soundwire/chip.h b/src/drivers/intel/soundwire/chip.h
new file mode 100644
index 0000000000..1ec35400ad
--- /dev/null
+++ b/src/drivers/intel/soundwire/chip.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __DRIVERS_INTEL_SOUNDWIRE_CHIP_H__
+#define __DRIVERS_INTEL_SOUNDWIRE_CHIP_H__
+
+struct drivers_intel_soundwire_config {
+};
+
+#endif /* __DRIVERS_INTEL_SOUNDWIRE_CHIP_H__ */
diff --git a/src/drivers/intel/soundwire/soundwire.c b/src/drivers/intel/soundwire/soundwire.c
new file mode 100644
index 0000000000..ab09ff4473
--- /dev/null
+++ b/src/drivers/intel/soundwire/soundwire.c
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpigen.h>
+#include <acpi/acpi_device.h>
+#include <acpi/acpi_soundwire.h>
+#include <commonlib/helpers.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <device/soundwire.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "soundwire.h"
+#include "chip.h"
+
+__weak int soc_fill_soundwire_controller(struct intel_soundwire_controller **controller)
+{
+ return -1;
+}
+
+static bool link_enabled(const struct device *dev, unsigned int link)
+{
+ struct device *child;
+
+ for (child = dev->link_list->children; child; child = child->sibling) {
+ if (child->enabled && child->path.type == DEVICE_PATH_GENERIC &&
+ child->path.generic.id == link)
+ return true;
+ }
+ return false;
+}
+
+static void intel_soundwire_link_prop_cb(struct acpi_dp *dsd, unsigned int id,
+ const struct soundwire_controller *controller)
+{
+ struct intel_soundwire_controller *intel_controller =
+ container_of(controller, struct intel_soundwire_controller, sdw);
+ unsigned int quirk_mask = intel_controller->quirk_mask;
+
+ /* Disable link if no are children enabled on this link device. */
+ if (!link_enabled(intel_controller->dev, id))
+ quirk_mask |= INTEL_SOUNDWIRE_QUIRK_BUS_DISABLE;
+
+ acpi_dp_add_integer(dsd, "intel-sdw-ip-clock", intel_controller->ip_clock);
+ acpi_dp_add_integer(dsd, "intel-quirk-mask", quirk_mask);
+}
+
+static void intel_soundwire_fill_ssdt(const struct device *dev)
+{
+ struct acpi_dp *dsd;
+ struct intel_soundwire_controller *controller;
+ const char *scope = acpi_device_scope(dev);
+
+ if (!dev->enabled || !scope)
+ return;
+
+ if (soc_fill_soundwire_controller(&controller) < 0 || !controller)
+ return;
+
+ /* Provide device pointer for link property callback function. */
+ controller->dev = dev;
+
+ acpigen_write_scope(scope);
+ acpigen_write_device(acpi_device_name(dev));
+ acpigen_write_name_string("_DDN", dev->chip_ops->name);
+ acpigen_write_name_integer("_ADR", controller->acpi_address);
+ acpigen_write_name_string("_CID", ACPI_HID_CONTAINER);
+
+ acpigen_write_STA(acpi_device_status(dev));
+
+ dsd = acpi_dp_new_table("_DSD");
+ soundwire_gen_controller(dsd, &controller->sdw, &intel_soundwire_link_prop_cb);
+ acpi_dp_write(dsd);
+
+ acpigen_pop_len(); /* Device */
+ acpigen_pop_len(); /* Scope */
+}
+
+static const char *intel_soundwire_acpi_name(const struct device *dev)
+{
+ return "SNDW";
+}
+
+static struct device_operations intel_soundwire_ops = {
+ .read_resources = noop_read_resources,
+ .set_resources = noop_set_resources,
+ .acpi_name = intel_soundwire_acpi_name,
+ .acpi_fill_ssdt = intel_soundwire_fill_ssdt,
+ .scan_bus = scan_static_bus,
+};
+
+static void intel_soundwire_enable(struct device *dev)
+{
+ dev->ops = &intel_soundwire_ops;
+}
+
+struct chip_operations drivers_intel_soundwire_ops = {
+ CHIP_NAME("Intel SoundWire Controller")
+ .enable_dev = intel_soundwire_enable
+};
diff --git a/src/drivers/intel/soundwire/soundwire.h b/src/drivers/intel/soundwire/soundwire.h
new file mode 100644
index 0000000000..3e2addfcbf
--- /dev/null
+++ b/src/drivers/intel/soundwire/soundwire.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __DRIVERS_INTEL_SOUNDWIRE_H__
+#define __DRIVERS_INTEL_SOUNDWIRE_H__
+
+#include <device/soundwire.h>
+#include <stdint.h>
+
+/**
+ * enum intel_soundwire_quirk - Quirks for controller master links.
+ * @INTEL_SOUNDWIRE_QUIRK_STATIC_CLOCK: Link clock is fixed.
+ * @INTEL_SOUNDWIRE_QUIRK_BUS_DISABLE: This link should be disabled.
+ */
+enum intel_soundwire_quirk {
+ INTEL_SOUNDWIRE_QUIRK_STATIC_CLOCK = BIT(0),
+ INTEL_SOUNDWIRE_QUIRK_BUS_DISABLE = BIT(1),
+};
+
+/**
+ * struct intel_soundwire_controller - SoundWire controller configuration for Intel SoC.
+ * @dev: Device handle for this controller.
+ * @acpi_address: ACPI address for this controller. This is a custom address that is not
+ * compatible with either PCI or SoundWire.
+ * @ip_clock: Frequency of the source clock connected to the controller.
+ * @quirk_mask: Quirks that can be passed to the kernel drivers.
+ * @sdw: SoundWire controller properties defined in MIPI SoundWire DisCo Specification.
+ */
+struct intel_soundwire_controller {
+ const struct device *dev;
+ uint64_t acpi_address;
+ unsigned int ip_clock;
+ unsigned int quirk_mask;
+ struct soundwire_controller sdw;
+};
+
+/**
+ * soc_fill_soundwire_controller() - Get SoundWire controller properties from the SoC.
+ * @controller: Properties to be filled by the SoC.
+ * Return zero for success, -1 if there was any error filling the properties.
+ */
+int soc_fill_soundwire_controller(struct intel_soundwire_controller **controller);
+
+#endif /* __DRIVERS_INTEL_SOUNDWIRE_H__ */