diff options
| -rw-r--r-- | src/drivers/intel/soundwire/Kconfig | 2 | ||||
| -rw-r--r-- | src/drivers/intel/soundwire/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/drivers/intel/soundwire/chip.h | 9 | ||||
| -rw-r--r-- | src/drivers/intel/soundwire/soundwire.c | 100 | ||||
| -rw-r--r-- | src/drivers/intel/soundwire/soundwire.h | 43 |
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__ */ |