src/soc/amd/common/block/acp/acp.c

/* SPDX-License-Identifier: GPL-2.0-only */

#include <acpi/acpi_device.h>
#include <acpi/acpigen.h>
#include <amdblocks/acp.h>
#include <amdblocks/acpimmio.h>
#include <amdblocks/chip.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <commonlib/helpers.h>
#include "acp_def.h"

_Static_assert(!(CONFIG(SOC_AMD_COMMON_BLOCK_ACP_GEN1) && CONFIG(SOC_AMD_COMMON_BLOCK_ACP_GEN2)),
	"Cannot select both ACP_GEN1 and ACP_GEN2 - check your config");

static const char *acp_acpi_name(const struct device *dev)
{
	return "ACPD";
}

static void acp_fill_wov_method(const struct device *dev)
{
	const struct soc_amd_common_config *cfg = soc_get_common_config();
	const char *scope = acpi_device_path(dev);

	if (!cfg->acp_config.dmic_present || !scope)
		return;

	/* For ACP DMIC hardware runtime detection on the platform, _WOV method is populated. */
	acpigen_write_scope(scope); /* Scope */
	acpigen_write_method("_WOV", 0);
	acpigen_write_return_integer(1);
	acpigen_write_method_end();
	acpigen_write_scope_end();
}

static void acp_fill_ssdt(const struct device *dev)
{
	acpi_device_write_pci_dev(dev);
	acp_fill_wov_method(dev);
}

static struct device_operations acp_ops = {
	.read_resources = pci_dev_read_resources,
	.set_resources = pci_dev_set_resources,
	.enable_resources = pci_dev_enable_resources,
	.init = acp_init,
	.ops_pci = &pci_dev_ops_pci,
	.scan_bus = scan_static_bus,
	.acpi_name = acp_acpi_name,
	.acpi_fill_ssdt = acp_fill_ssdt,
};

static const struct pci_driver acp_driver __pci_driver = {
	.ops = &acp_ops,
	.vendor = PCI_VID_AMD,
	.device = PCI_DID_AMD_FAM17H_ACP,
};