acp.c

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/* 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,
};