/**
Read data via IsaIo protocol with given number.
@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
@param Buffer Buffer receive data of mouse
@param BufSize The size of buffer
@param State Check input or read data
@return status of reading mouse data.
**/
EFI_STATUS
PS2MouseRead (
IN EFI_ISA_IO_PROTOCOL *IsaIo,
OUT VOID *Buffer,
IN OUT UINTN *BufSize,
IN UINTN State
)
{
EFI_STATUS Status;
UINTN BytesRead;
Status = EFI_SUCCESS;
BytesRead = 0;
if (State == PS2_READ_BYTE_ONE) {
//
// Check input for mouse
//
Status = CheckForInput (IsaIo);
if (EFI_ERROR (Status)) {
return Status;
}
}
while (BytesRead < *BufSize) {
Status = WaitOutputFull (IsaIo, TIMEOUT);
if (EFI_ERROR (Status)) {
break;
}
IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_DATA_PORT, 1, Buffer);
BytesRead++;
Buffer = (UINT8 *) Buffer + 1;
}
//
// Verify the correct number of bytes read
//
if (BytesRead == 0 || BytesRead != *BufSize) {
Status = EFI_NOT_FOUND;
}
*BufSize = BytesRead;
return Status;
}
/**
I/O work flow of in 8042 Aux data.
@param Data Buffer holding return value.
@retval EFI_SUCCESS Success to excute I/O work flow
@retval EFI_TIMEOUT Keyboard controller time out.
**/
EFI_STATUS
In8042AuxData (
IN OUT UINT8 *Data
)
{
EFI_STATUS Status;
//
// wait for output data
//
Status = WaitOutputFull (BAT_TIMEOUT);
if (EFI_ERROR (Status)) {
return Status;
}
*Data = IoRead8 (KBC_DATA_PORT);
return EFI_SUCCESS;
}
/**
I/O work flow of in 8042 Aux data.
@param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
@param Data Buffer holding return value.
@retval EFI_SUCCESS Success to excute I/O work flow
@retval EFI_TIMEOUT Keyboard controller time out.
**/
EFI_STATUS
In8042AuxData (
IN EFI_ISA_IO_PROTOCOL *IsaIo,
IN OUT UINT8 *Data
)
{
EFI_STATUS Status;
//
// wait for output data
//
Status = WaitOutputFull (IsaIo, BAT_TIMEOUT);
if (EFI_ERROR (Status)) {
return Status;
}
IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_DATA_PORT, 1, Data);
return EFI_SUCCESS;
}
/**
Read data via IsaIo protocol with given number.
@param Buffer Buffer receive data of mouse
@param BufSize The size of buffer
@param State Check input or read data
@return status of reading mouse data.
**/
EFI_STATUS
PS2MouseRead (
OUT UINT8 *Buffer,
IN OUT UINTN *BufSize,
IN UINTN State
)
{
EFI_STATUS Status;
UINTN BytesRead;
Status = EFI_SUCCESS;
if (State == PS2_READ_BYTE_ONE) {
//
// Check input for mouse
//
Status = CheckForInput ();
if (EFI_ERROR (Status)) {
return Status;
}
}
for (BytesRead = 0; BytesRead < *BufSize; BytesRead++) {
Status = WaitOutputFull (TIMEOUT);
if (EFI_ERROR (Status)) {
break;
}
Buffer[BytesRead] = IoRead8 (KBC_DATA_PORT);
}
//
// Verify the correct number of bytes read
//
if (BytesRead == 0 || BytesRead != *BufSize) {
Status = EFI_NOT_FOUND;
}
*BufSize = BytesRead;
return Status;
}
