diff options
Diffstat (limited to 'Board/EM/Platform/Library/Dxe/DxeKscLib/DxeKscLib.c')
| -rw-r--r-- | Board/EM/Platform/Library/Dxe/DxeKscLib/DxeKscLib.c | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/Board/EM/Platform/Library/Dxe/DxeKscLib/DxeKscLib.c b/Board/EM/Platform/Library/Dxe/DxeKscLib/DxeKscLib.c new file mode 100644 index 0000000..f48c576 --- /dev/null +++ b/Board/EM/Platform/Library/Dxe/DxeKscLib/DxeKscLib.c @@ -0,0 +1,288 @@ + +#include <Protocol\CpuIo.h> +#include <AmiDxeLib.h> +#include "KscLib.h" + +EFI_CPU_IO_PROTOCOL *mDxeKscLibCpuIo; + +BOOLEAN mDxeKscLibInitialized = FALSE; +extern EFI_BOOT_SERVICES *pBS; + +// +// Function implemenations +// +EFI_STATUS +InitializeKscLib ( + VOID + ) +/*++ + +Routine Description: + + Initialize the library. + The DXE library only requires CPU IO protocol, so this will locate CPU IO protocol + and save it for future use. + +Arguments: + + None. + +Returns: + + EFI_SUCCESS - KscLib is successfully initialized. + +--*/ +{ + EFI_STATUS Status; + UINT8 Data; + + // + // Locate CpuIo protocol + // + + Status = pBS->LocateProtocol (&gEfiCpuIoProtocolGuid, NULL, &mDxeKscLibCpuIo); + ASSERT_EFI_ERROR (Status); + + // + // Fail if EC doesn't exist. + // + mDxeKscLibCpuIo->Io.Read (mDxeKscLibCpuIo, EfiCpuIoWidthUint8, KSC_C_PORT, 1, &Data); + if(Data == 0xff){ + mDxeKscLibInitialized = FALSE; + Status = EFI_DEVICE_ERROR; + } else { + mDxeKscLibInitialized = TRUE; + Status = EFI_SUCCESS; + } + return Status; +} + +EFI_STATUS +SendKscCommand ( + UINT8 Command + ) +/*++ + +Routine Description: + + Sends command to Keyboard System Controller. + +Arguments: + + Command - Command byte to send + +Returns: + + EFI_SUCCESS - Command success + EFI_DEVICE_ERROR - Command error + +--*/ +{ + UINTN Index; + UINT8 KscStatus; + EFI_STATUS Status; + + KscStatus = 0; + Index = 0; + + // + // Locate CpuIo protocol + // + + Status = pBS->LocateProtocol (&gEfiCpuIoProtocolGuid, NULL, &mDxeKscLibCpuIo); + ASSERT_EFI_ERROR (Status); + + // + // Wait for KSC to be ready (with a timeout) + // + ReceiveKscStatus (&KscStatus); + while (((KscStatus & KSC_S_IBF) != 0) && (Index < KSC_TIME_OUT)) { + pBS->Stall (15); + ReceiveKscStatus (&KscStatus); + Index++; + } + if (Index >= KSC_TIME_OUT) { + return EFI_DEVICE_ERROR; + } + + // + // Send the KSC command + // + Status = mDxeKscLibCpuIo->Io.Write ( + mDxeKscLibCpuIo, + EfiCpuIoWidthUint8, + KSC_C_PORT, + 1, + &Command + ); + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + +EFI_STATUS +ReceiveKscStatus ( + UINT8 *KscStatus + ) +/*++ + +Routine Description: + + Receives status from Keyboard System Controller. + +Arguments: + + Status - Status byte to receive + +Returns: + + EFI_SUCCESS - Always success + +--*/ +{ + EFI_STATUS Status = EFI_SUCCESS; + + // + // Locate CpuIo protocol + // + + Status = pBS->LocateProtocol (&gEfiCpuIoProtocolGuid, NULL, &mDxeKscLibCpuIo); + ASSERT_EFI_ERROR (Status); + + // + // Read and return the status + // + Status = mDxeKscLibCpuIo->Io.Read ( + mDxeKscLibCpuIo, + EfiCpuIoWidthUint8, + KSC_C_PORT, + 1, + KscStatus + ); + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + +EFI_STATUS +SendKscData ( + UINT8 Data + ) +/*++ + +Routine Description: + + Sends data to Keyboard System Controller. + +Arguments: + + Data - Data byte to send + +Returns: + + EFI_SUCCESS - Success + EFI_TIMEOUT - Timeout + Other - Failed + +--*/ +{ + UINTN Index; + UINT8 KscStatus; + EFI_STATUS Status = EFI_SUCCESS; + + Index = 0; + + // + // Locate CpuIo protocol + // + Status = pBS->LocateProtocol (&gEfiCpuIoProtocolGuid, NULL, &mDxeKscLibCpuIo); + ASSERT_EFI_ERROR (Status); + + // + // Wait for KSC to be ready (with a timeout) + // + ReceiveKscStatus (&KscStatus); + while (((KscStatus & KSC_S_IBF) != 0) && (Index < KSC_TIME_OUT)) { + pBS->Stall (15); + ReceiveKscStatus (&KscStatus); + Index++; + } + if (Index >= KSC_TIME_OUT) { + return EFI_DEVICE_ERROR; + } + + // + // Send the data and return + // + Status = mDxeKscLibCpuIo->Io.Write ( + mDxeKscLibCpuIo, + EfiCpuIoWidthUint8, + KSC_D_PORT, + 1, + &Data + ); + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + +EFI_STATUS +ReceiveKscData ( + UINT8 *Data + ) +/*++ + +Routine Description: + + Receives data from Keyboard System Controller. + +Arguments: + + Data - Data byte received + +Returns: + + EFI_SUCCESS - Read success + EFI_DEVICE_ERROR - Read error + +--*/ +{ + UINTN Index; + UINT8 KscStatus; + EFI_STATUS Status = EFI_SUCCESS; + + Index = 0; + + // + // Locate CpuIo protocol + // + + Status = pBS->LocateProtocol (&gEfiCpuIoProtocolGuid, NULL, &mDxeKscLibCpuIo); + ASSERT_EFI_ERROR (Status); + // + // Wait for KSC to be ready (with a timeout) + // + ReceiveKscStatus (&KscStatus); + while (((KscStatus & KSC_S_OBF) == 0) && (Index < KSC_TIME_OUT)) { + pBS->Stall (15); + ReceiveKscStatus (&KscStatus); + Index++; + } + if (Index >= KSC_TIME_OUT) { + return EFI_DEVICE_ERROR; + } + + // + // Read KSC data and return + // + Status = mDxeKscLibCpuIo->Io.Read ( + mDxeKscLibCpuIo, + EfiCpuIoWidthUint8, + KSC_D_PORT, + 1, + Data + ); + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} |