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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi_device.h>
   4 #include <acpi/acpigen.h>
   5 #include <amdblocks/acp.h>
   6 #include <amdblocks/acpimmio.h>
   7 #include <amdblocks/chip.h>
   8 #include <device/device.h>
   9 #include <device/pci.h>
  10 #include <device/pci_ops.h>
  11 #include <commonlib/helpers.h>
  12 #include "acp_def.h"
  13
  14 _Static_assert(!(CONFIG(SOC_AMD_COMMON_BLOCK_ACP_GEN1) && CONFIG(SOC_AMD_COMMON_BLOCK_ACP_GEN2)),
  15         "Cannot select both ACP_GEN1 and ACP_GEN2 - check your config");
  16
  17 static const char *acp_acpi_name(const struct device *dev)
  18 {
  19         return "ACPD";
  20 }
  21
  22 static void acp_fill_wov_method(const struct device *dev)
  23 {
  24         const struct soc_amd_common_config *cfg = soc_get_common_config();
  25         const char *scope = acpi_device_path(dev);
  26
  27         if (!cfg->acp_config.dmic_present || !scope)
  28                 return;
  29
  30         /* For ACP DMIC hardware runtime detection on the platform, _WOV method is populated. */
  31         acpigen_write_scope(scope); /* Scope */
  32         acpigen_write_method("_WOV", 0);
  33         acpigen_write_return_integer(1);
  34         acpigen_write_method_end();
  35         acpigen_write_scope_end();
  36 }
  37
  38 static void acp_fill_ssdt(const struct device *dev)
  39 {
  40         acpi_device_write_pci_dev(dev);
  41         acp_fill_wov_method(dev);
  42 }
  43
  44 struct device_operations amd_acp_ops = {
  45         .read_resources = pci_dev_read_resources,
  46         .set_resources = pci_dev_set_resources,
  47         .enable_resources = pci_dev_enable_resources,
  48         .init = acp_init,
  49         .ops_pci = &pci_dev_ops_pci,
  50         .scan_bus = scan_static_bus,
  51         .acpi_name = acp_acpi_name,
  52         .acpi_fill_ssdt = acp_fill_ssdt,
  53 };