PcAtChipsetPkg/IsaAcpiDxe/PcatIsaAcpi.c

   1 /** @file
   2   EFI PCAT ISA ACPI Driver for a Generic PC Platform
   3
   4 Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "PcatIsaAcpi.h"
  16
  17 //
  18 //  PcatIsaAcpi Driver Binding Protocol
  19 //
  20 EFI_DRIVER_BINDING_PROTOCOL gPcatIsaAcpiDriverBinding = {
  21   PcatIsaAcpiDriverBindingSupported,
  22   PcatIsaAcpiDriverBindingStart,
  23   PcatIsaAcpiDriverBindingStop,
  24   0xa,
  25   NULL,
  26   NULL
  27 };
  28
  29 /**
  30   the entry point of the PcatIsaAcpi driver.
  31
  32   @param ImageHandle     Handle for driver image
  33   @param SystemTable     Point to EFI_SYSTEM_TABLE
  34
  35   @return Sucess or not for installing driver binding protocol
  36 **/
  37 EFI_STATUS
  38 EFIAPI
  39 PcatIsaAcpiDriverEntryPoint (
  40   IN EFI_HANDLE        ImageHandle,
  41   IN EFI_SYSTEM_TABLE  *SystemTable
  42   )
  43 {
  44   return EfiLibInstallDriverBindingComponentName2 (
  45            ImageHandle,
  46            SystemTable,
  47            &gPcatIsaAcpiDriverBinding,
  48            ImageHandle,
  49            &gPcatIsaAcpiComponentName,
  50            &gPcatIsaAcpiComponentName2
  51            );
  52 }
  53
  54 /**
  55   ControllerDriver Protocol Method
  56
  57   @param This                 Driver Binding protocol instance pointer.
  58   @param Controller           Handle of device to test.
  59   @param RemainingDevicePath  Optional parameter use to pick a specific child
  60                               device to start.
  61   @retval EFI_SUCCESS         This driver supports this device.
  62   @retval other               This driver does not support this device.
  63
  64 **/
  65 EFI_STATUS
  66 EFIAPI
  67 PcatIsaAcpiDriverBindingSupported (
  68   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  69   IN EFI_HANDLE                   Controller,
  70   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
  71   )
  72 {
  73   EFI_STATUS           Status;
  74   EFI_PCI_IO_PROTOCOL  *PciIo;
  75   PCI_TYPE00           Pci;
  76   UINTN                SegmentNumber;
  77   UINTN                BusNumber;
  78   UINTN                DeviceNumber;
  79   UINTN                FunctionNumber;
  80
  81   //
  82   // Get PciIo protocol instance
  83   //
  84   Status = gBS->OpenProtocol (
  85                   Controller,
  86                   &gEfiPciIoProtocolGuid,
  87                   (VOID**)&PciIo,
  88                   This->DriverBindingHandle,
  89                   Controller,
  90                   EFI_OPEN_PROTOCOL_BY_DRIVER
  91                   );
  92   if (EFI_ERROR(Status)) {
  93     return Status;
  94   }
  95
  96   Status = PciIo->Pci.Read (
  97                     PciIo,
  98                     EfiPciIoWidthUint32,
  99                     0,
 100                     sizeof(Pci) / sizeof(UINT32),
 101                     &Pci);
 102
 103   if (!EFI_ERROR (Status)) {
 104     Status = EFI_UNSUPPORTED;
 105     if ((Pci.Hdr.Command & 0x03) == 0x03) {
 106       if (Pci.Hdr.ClassCode[2] == PCI_CLASS_BRIDGE) {
 107         //
 108         // See if this is a standard PCI to ISA Bridge from the Base Code and Class Code
 109         //
 110         if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA) {
 111           Status = EFI_SUCCESS;
 112         }
 113
 114         //
 115         // See if this is an Intel PCI to ISA bridge in Positive Decode Mode
 116         //
 117         if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA_PDECODE &&
 118             Pci.Hdr.VendorId     == 0x8086                          ) {
 119           //
 120           // See if this is on Function #0 to avoid false positives on
 121           // PCI_CLASS_BRIDGE_OTHER that has the same value as
 122           // PCI_CLASS_BRIDGE_ISA_PDECODE
 123           //
 124           Status = PciIo->GetLocation (
 125                             PciIo,
 126                             &SegmentNumber,
 127                             &BusNumber,
 128                             &DeviceNumber,
 129                             &FunctionNumber
 130                             );
 131           if (!EFI_ERROR (Status) && FunctionNumber == 0) {
 132             Status = EFI_SUCCESS;
 133           } else {
 134             Status = EFI_UNSUPPORTED;
 135           }
 136         }
 137       }
 138     }
 139   }
 140
 141   gBS->CloseProtocol (
 142          Controller,
 143          &gEfiPciIoProtocolGuid,
 144          This->DriverBindingHandle,
 145          Controller
 146          );
 147
 148   return Status;
 149 }
 150
 151 /**
 152   Install EFI_ISA_ACPI_PROTOCOL.
 153
 154   @param  This                 Driver Binding protocol instance pointer.
 155   @param  ControllerHandle     Handle of device to bind driver to.
 156   @param  RemainingDevicePath  Optional parameter use to pick a specific child
 157                                device to start.
 158
 159   @retval EFI_SUCCESS          This driver is added to ControllerHandle
 160   @retval EFI_ALREADY_STARTED  This driver is already running on ControllerHandle
 161   @retval other                This driver does not support this device
 162 **/
 163 EFI_STATUS
 164 EFIAPI
 165 PcatIsaAcpiDriverBindingStart (
 166   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
 167   IN EFI_HANDLE                   Controller,
 168   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
 169   )
 170 {
 171   EFI_STATUS           Status;
 172   EFI_PCI_IO_PROTOCOL  *PciIo;
 173   PCAT_ISA_ACPI_DEV    *PcatIsaAcpiDev;
 174   UINT64               Supports;
 175   BOOLEAN              Enabled;
 176
 177   Enabled = FALSE;
 178   Supports = 0;
 179   PcatIsaAcpiDev = NULL;
 180   //
 181   // Open the PCI I/O Protocol Interface
 182   //
 183   PciIo = NULL;
 184   Status = gBS->OpenProtocol (
 185                   Controller,
 186                   &gEfiPciIoProtocolGuid,
 187                   (VOID**)&PciIo,
 188                   This->DriverBindingHandle,
 189                   Controller,
 190                   EFI_OPEN_PROTOCOL_BY_DRIVER
 191                   );
 192   if (EFI_ERROR (Status)) {
 193     goto Done;
 194   }
 195
 196   //
 197   // Get supported PCI attributes
 198   //
 199   Status = PciIo->Attributes (
 200                     PciIo,
 201                     EfiPciIoAttributeOperationSupported,
 202                     0,
 203                     &Supports
 204                     );
 205   if (EFI_ERROR (Status)) {
 206     goto Done;
 207   }
 208
 209   Supports &= (EFI_PCI_IO_ATTRIBUTE_ISA_IO | EFI_PCI_IO_ATTRIBUTE_ISA_IO_16);
 210   if (Supports == 0 || Supports == (EFI_PCI_IO_ATTRIBUTE_ISA_IO | EFI_PCI_IO_ATTRIBUTE_ISA_IO_16)) {
 211     Status = EFI_UNSUPPORTED;
 212     goto Done;
 213   }
 214
 215   Enabled = TRUE;
 216   Status = PciIo->Attributes (
 217                     PciIo,
 218                     EfiPciIoAttributeOperationEnable,
 219                     EFI_PCI_DEVICE_ENABLE | Supports | EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO,
 220                     NULL
 221                     );
 222   if (EFI_ERROR (Status)) {
 223     goto Done;
 224   }
 225
 226   //
 227   // Allocate memory for the PCAT ISA ACPI Device structure
 228   //
 229   PcatIsaAcpiDev = NULL;
 230   Status = gBS->AllocatePool (
 231                   EfiBootServicesData,
 232                   sizeof(PCAT_ISA_ACPI_DEV),
 233                   (VOID**)&PcatIsaAcpiDev
 234                   );
 235   if (EFI_ERROR (Status)) {
 236     goto Done;
 237   }
 238
 239   //
 240   // Initialize the PCAT ISA ACPI Device structure
 241   //
 242   PcatIsaAcpiDev->Signature = PCAT_ISA_ACPI_DEV_SIGNATURE;
 243   PcatIsaAcpiDev->Handle    = Controller;
 244   PcatIsaAcpiDev->PciIo     = PciIo;
 245
 246   //
 247   // IsaAcpi interface
 248   //
 249   (PcatIsaAcpiDev->IsaAcpi).DeviceEnumerate  = IsaDeviceEnumerate;
 250   (PcatIsaAcpiDev->IsaAcpi).SetPower         = IsaDeviceSetPower;
 251   (PcatIsaAcpiDev->IsaAcpi).GetCurResource   = IsaGetCurrentResource;
 252   (PcatIsaAcpiDev->IsaAcpi).GetPosResource   = IsaGetPossibleResource;
 253   (PcatIsaAcpiDev->IsaAcpi).SetResource      = IsaSetResource;
 254   (PcatIsaAcpiDev->IsaAcpi).EnableDevice     = IsaEnableDevice;
 255   (PcatIsaAcpiDev->IsaAcpi).InitDevice       = IsaInitDevice;
 256   (PcatIsaAcpiDev->IsaAcpi).InterfaceInit    = IsaInterfaceInit;
 257
 258   //
 259   // Install the ISA ACPI Protocol interface
 260   //
 261   Status = gBS->InstallMultipleProtocolInterfaces (
 262                   &Controller,
 263                   &gEfiIsaAcpiProtocolGuid, &PcatIsaAcpiDev->IsaAcpi,
 264                   NULL
 265                   );
 266
 267 Done:
 268   if (EFI_ERROR (Status)) {
 269     if (PciIo != NULL && Enabled) {
 270       PciIo->Attributes (
 271                PciIo,
 272                EfiPciIoAttributeOperationDisable,
 273                EFI_PCI_DEVICE_ENABLE | Supports | EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO,
 274                NULL
 275                );
 276     }
 277     gBS->CloseProtocol (
 278            Controller,
 279            &gEfiPciIoProtocolGuid,
 280            This->DriverBindingHandle,
 281            Controller
 282            );
 283     if (PcatIsaAcpiDev != NULL) {
 284       gBS->FreePool (PcatIsaAcpiDev);
 285     }
 286     return Status;
 287   }
 288
 289   return EFI_SUCCESS;
 290 }
 291
 292
 293 /**
 294   Stop this driver on ControllerHandle. Support stopping any child handles
 295   created by this driver.
 296
 297   @param  This              Protocol instance pointer.
 298   @param  ControllerHandle  Handle of device to stop driver on
 299   @param  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
 300                             children is zero stop the entire bus driver.
 301   @param  ChildHandleBuffer List of Child Handles to Stop.
 302
 303   @retval EFI_SUCCESS       This driver is removed ControllerHandle
 304   @retval other             This driver was not removed from this device
 305
 306 **/
 307 EFI_STATUS
 308 EFIAPI
 309 PcatIsaAcpiDriverBindingStop (
 310   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
 311   IN EFI_HANDLE                   Controller,
 312   IN UINTN                        NumberOfChildren,
 313   IN EFI_HANDLE                   *ChildHandleBuffer
 314   )
 315 {
 316   EFI_STATUS             Status;
 317   EFI_ISA_ACPI_PROTOCOL  *IsaAcpi;
 318   PCAT_ISA_ACPI_DEV      *PcatIsaAcpiDev;
 319   UINT64                 Supports;
 320
 321   //
 322   // Get the ISA ACPI Protocol Interface
 323   //
 324   Status = gBS->OpenProtocol (
 325                   Controller,
 326                   &gEfiIsaAcpiProtocolGuid,
 327                   (VOID**)&IsaAcpi,
 328                   This->DriverBindingHandle,
 329                   Controller,
 330                   EFI_OPEN_PROTOCOL_GET_PROTOCOL
 331                   );
 332   if (EFI_ERROR (Status)) {
 333     return Status;
 334   }
 335
 336   //
 337   // Get the PCAT ISA ACPI Device structure from the ISA ACPI Protocol
 338   //
 339   PcatIsaAcpiDev = PCAT_ISA_ACPI_DEV_FROM_THIS (IsaAcpi);
 340
 341   //
 342   // Get supported PCI attributes
 343   //
 344   Status = PcatIsaAcpiDev->PciIo->Attributes (
 345                                     PcatIsaAcpiDev->PciIo,
 346                                     EfiPciIoAttributeOperationSupported,
 347                                     0,
 348                                     &Supports
 349                                     );
 350   if (EFI_ERROR (Status)) {
 351     return Status;
 352   }
 353
 354   Supports &= (EFI_PCI_IO_ATTRIBUTE_ISA_IO | EFI_PCI_IO_ATTRIBUTE_ISA_IO_16);
 355
 356   PcatIsaAcpiDev->PciIo->Attributes (
 357                            PcatIsaAcpiDev->PciIo,
 358                            EfiPciIoAttributeOperationDisable,
 359                            EFI_PCI_DEVICE_ENABLE | Supports | EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO,
 360                            NULL
 361                            );
 362
 363   //
 364   // Uninstall protocol interface: EFI_ISA_ACPI_PROTOCOL
 365   //
 366   Status = gBS->UninstallProtocolInterface (
 367                   Controller,
 368                   &gEfiIsaAcpiProtocolGuid, &PcatIsaAcpiDev->IsaAcpi
 369                   );
 370   if (EFI_ERROR (Status)) {
 371     return Status;
 372   }
 373
 374   gBS->CloseProtocol (
 375          Controller,
 376          &gEfiPciIoProtocolGuid,
 377          This->DriverBindingHandle,
 378          Controller
 379          );
 380
 381   gBS->FreePool (PcatIsaAcpiDev);
 382
 383   return EFI_SUCCESS;
 384 }