mirror of
https://github.com/reactos/reactos.git
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180 lines
5.1 KiB
C
180 lines
5.1 KiB
C
/*
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* PROJECT: ReactOS ACPI bus driver
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* FILE: acpi/ospm/acpienum.c
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* PURPOSE: ACPI namespace enumerator
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* PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
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* UPDATE HISTORY:
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* 01-05-2001 CSH Created
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*/
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#include "precomp.h"
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#define NDEBUG
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#include <debug.h>
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#define HAS_CHILDREN(d) ((d)->children.next != &((d)->children))
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#define HAS_SIBLINGS(d) (((d)->parent) && ((d)->node.next != &(d)->parent->children))
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#define NODE_TO_DEVICE(n) (list_entry(n, struct acpi_device, node))
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extern struct acpi_device *acpi_root;
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NTSTATUS
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Bus_PlugInDevice (
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struct acpi_device *Device,
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PFDO_DEVICE_DATA FdoData
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)
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{
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PDEVICE_OBJECT pdo;
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PPDO_DEVICE_DATA pdoData;
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NTSTATUS status;
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ULONG index;
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WCHAR temp[256];
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PLIST_ENTRY entry;
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PAGED_CODE ();
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//Don't enumerate the root device
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if (Device->handle == ACPI_ROOT_OBJECT)
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return STATUS_SUCCESS;
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/* Check we didnt add this already */
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for (entry = FdoData->ListOfPDOs.Flink;
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entry != &FdoData->ListOfPDOs; entry = entry->Flink)
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{
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struct acpi_device *CurrentDevice;
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pdoData = CONTAINING_RECORD (entry, PDO_DEVICE_DATA, Link);
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//dont duplicate devices
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if (pdoData->AcpiHandle == Device->handle)
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return STATUS_SUCCESS;
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//check everything but fixed feature devices
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if (pdoData->AcpiHandle)
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acpi_bus_get_device(pdoData->AcpiHandle, &CurrentDevice);
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else
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continue;
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//check if the HID matches
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if (!strcmp(Device->pnp.hardware_id, CurrentDevice->pnp.hardware_id))
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{
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//check if UID exists for both and matches
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if (Device->flags.unique_id && CurrentDevice->flags.unique_id &&
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!strcmp(Device->pnp.unique_id, CurrentDevice->pnp.unique_id))
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{
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/* We have a UID on both but they're the same so we have to ignore it */
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DPRINT1("Detected duplicate device: %hs %hs\n", Device->pnp.hardware_id, Device->pnp.unique_id);
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return STATUS_SUCCESS;
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}
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else if (!Device->flags.unique_id && !CurrentDevice->flags.unique_id)
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{
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/* No UID so we can only legally have 1 of these devices */
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DPRINT1("Detected duplicate device: %hs\n", Device->pnp.hardware_id);
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return STATUS_SUCCESS;
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}
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}
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}
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DPRINT("Exposing PDO\n"
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"======AcpiHandle: %p\n"
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"======HardwareId: %s\n",
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Device->handle,
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Device->pnp.hardware_id);
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//
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// Create the PDO
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//
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DPRINT("FdoData->NextLowerDriver = 0x%p\n", FdoData->NextLowerDriver);
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status = IoCreateDevice(FdoData->Common.Self->DriverObject,
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sizeof(PDO_DEVICE_DATA),
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NULL,
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FILE_DEVICE_CONTROLLER,
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FILE_AUTOGENERATED_DEVICE_NAME,
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FALSE,
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&pdo);
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if (!NT_SUCCESS (status)) {
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return status;
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}
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pdoData = (PPDO_DEVICE_DATA) pdo->DeviceExtension;
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pdoData->AcpiHandle = Device->handle;
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//
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// Copy the hardware IDs
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//
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index = 0;
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index += swprintf(&temp[index],
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L"ACPI\\%hs",
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Device->pnp.hardware_id);
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temp[index++] = UNICODE_NULL;
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index += swprintf(&temp[index],
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L"*%hs",
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Device->pnp.hardware_id);
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temp[index++] = UNICODE_NULL;
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temp[index++] = UNICODE_NULL;
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pdoData->HardwareIDs = ExAllocatePoolWithTag(NonPagedPool, index*sizeof(WCHAR), 'DpcA');
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if (!pdoData->HardwareIDs) {
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IoDeleteDevice(pdo);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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RtlCopyMemory (pdoData->HardwareIDs, temp, index*sizeof(WCHAR));
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Bus_InitializePdo (pdo, FdoData);
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//
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// Device Relation changes if a new pdo is created. So let
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// the PNP system now about that. This forces it to send bunch of pnp
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// queries and cause the function driver to be loaded.
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//
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//IoInvalidateDeviceRelations (FdoData->UnderlyingPDO, BusRelations);
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return status;
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}
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/* looks alot like acpi_bus_walk doesnt it */
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NTSTATUS
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ACPIEnumerateDevices(PFDO_DEVICE_DATA DeviceExtension)
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{
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ULONG Count = 0;
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struct acpi_device *Device = acpi_root;
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while(Device)
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{
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if (Device->status.present && Device->status.enabled &&
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Device->flags.hardware_id)
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{
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Bus_PlugInDevice(Device, DeviceExtension);
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Count++;
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}
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if (HAS_CHILDREN(Device)) {
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Device = NODE_TO_DEVICE(Device->children.next);
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continue;
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}
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if (HAS_SIBLINGS(Device)) {
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Device = NODE_TO_DEVICE(Device->node.next);
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continue;
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}
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while ((Device = Device->parent)) {
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if (HAS_SIBLINGS(Device)) {
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Device = NODE_TO_DEVICE(Device->node.next);
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break;
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}
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}
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}
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DPRINT("acpi device count: %d\n", Count);
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return STATUS_SUCCESS;
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}
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/* EOF */
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