--- /dev/null
+/** @file\r
+ PS2 Mouse Communication Interface.\r
+\r
+Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
+are licensed and made available under the terms and conditions of the BSD License\r
+which accompanies this distribution. The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php\r
+\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include "Ps2Mouse.h"\r
+#include "CommPs2.h"\r
+\r
+UINT8 SampleRateTbl[MaxSampleRate] = { 0xa, 0x14, 0x28, 0x3c, 0x50, 0x64, 0xc8 };\r
+\r
+UINT8 ResolutionTbl[MaxResolution] = { 0, 1, 2, 3 };\r
+\r
+/**\r
+ Issue self test command via IsaIo interface.\r
+\r
+ @return EFI_SUCCESS Success to do keyboard self testing.\r
+ @return others Fail to do keyboard self testing.\r
+**/\r
+EFI_STATUS\r
+KbcSelfTest (\r
+ VOID\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINT8 Data;\r
+\r
+ //\r
+ // Keyboard controller self test\r
+ //\r
+ Status = Out8042Command (SELF_TEST);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ //\r
+ // Read return code\r
+ //\r
+ Status = In8042Data (&Data);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ if (Data != 0x55) {\r
+ return EFI_DEVICE_ERROR;\r
+ }\r
+ //\r
+ // Set system flag\r
+ //\r
+ Status = Out8042Command (READ_CMD_BYTE);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ Status = In8042Data (&Data);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ Status = Out8042Command (WRITE_CMD_BYTE);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ Data |= CMD_SYS_FLAG;\r
+ Status = Out8042Data (Data);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ Issue command to enable keyboard AUX functionality.\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+KbcEnableAux (\r
+ VOID\r
+ )\r
+{\r
+ //\r
+ // Send 8042 enable mouse command\r
+ //\r
+ return Out8042Command (ENABLE_AUX);\r
+}\r
+\r
+/**\r
+ Issue command to disable keyboard AUX functionality.\r
+\r
+ @param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+KbcDisableAux (\r
+ VOID\r
+ )\r
+{\r
+ //\r
+ // Send 8042 disable mouse command\r
+ //\r
+ return Out8042Command (DISABLE_AUX);\r
+}\r
+\r
+/**\r
+ Issue command to enable keyboard.\r
+\r
+ @param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+KbcEnableKb (\r
+ VOID\r
+ )\r
+{\r
+ //\r
+ // Send 8042 enable keyboard command\r
+ //\r
+ return Out8042Command (ENABLE_KB);\r
+}\r
+\r
+/**\r
+ Issue command to disable keyboard.\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+KbcDisableKb (\r
+ VOID\r
+ )\r
+{\r
+ //\r
+ // Send 8042 disable keyboard command\r
+ //\r
+ return Out8042Command (DISABLE_KB);\r
+}\r
+\r
+/**\r
+ Issue command to check keyboard status.\r
+\r
+ @param KeyboardEnable return whether keyboard is enable.\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+CheckKbStatus (\r
+ OUT BOOLEAN *KeyboardEnable\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINT8 Data;\r
+\r
+ //\r
+ // Send command to read KBC command byte\r
+ //\r
+ Status = Out8042Command (READ_CMD_BYTE);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ Status = In8042Data (&Data);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ //\r
+ // Check keyboard enable or not\r
+ //\r
+ if ((Data & CMD_KB_STS) == CMD_KB_DIS) {\r
+ *KeyboardEnable = FALSE;\r
+ } else {\r
+ *KeyboardEnable = TRUE;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ Issue command to reset keyboard.\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+PS2MouseReset (\r
+ VOID\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINT8 Data;\r
+\r
+ Status = Out8042AuxCommand (RESET_CMD, FALSE);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ Status = In8042AuxData (&Data);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ //\r
+ // Check BAT Complete Code\r
+ //\r
+ if (Data != PS2MOUSE_BAT1) {\r
+ return EFI_DEVICE_ERROR;\r
+ }\r
+\r
+ Status = In8042AuxData (&Data);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ //\r
+ // Check BAT Complete Code\r
+ //\r
+ if (Data != PS2MOUSE_BAT2) {\r
+ return EFI_DEVICE_ERROR;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ Issue command to set mouse's sample rate\r
+\r
+ @param SampleRate value of sample rate\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+PS2MouseSetSampleRate (\r
+ IN MOUSE_SR SampleRate\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+\r
+ //\r
+ // Send auxiliary command to set mouse sample rate\r
+ //\r
+ Status = Out8042AuxCommand (SETSR_CMD, FALSE);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ Status = Out8042AuxData (SampleRateTbl[SampleRate]);\r
+\r
+ return Status;\r
+}\r
+\r
+/**\r
+ Issue command to set mouse's resolution.\r
+\r
+ @param Resolution value of resolution\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+PS2MouseSetResolution (\r
+ IN MOUSE_RE Resolution\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+\r
+ //\r
+ // Send auxiliary command to set mouse resolution\r
+ //\r
+ Status = Out8042AuxCommand (SETRE_CMD, FALSE);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ Status = Out8042AuxData (ResolutionTbl[Resolution]);\r
+\r
+ return Status;\r
+}\r
+\r
+/**\r
+ Issue command to set mouse's scaling.\r
+\r
+ @param Scaling value of scaling\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+PS2MouseSetScaling (\r
+ IN MOUSE_SF Scaling\r
+ )\r
+{\r
+ //\r
+ // Send auxiliary command to set mouse scaling data\r
+ //\r
+ return Out8042AuxCommand (Scaling == Scaling1 ? SETSF1_CMD : SETSF2_CMD, FALSE);\r
+}\r
+\r
+/**\r
+ Issue command to enable Ps2 mouse.\r
+\r
+ @return Status of command issuing.\r
+**/\r
+EFI_STATUS\r
+PS2MouseEnable (\r
+ VOID\r
+ )\r
+{\r
+ //\r
+ // Send auxiliary command to enable mouse\r
+ //\r
+ return Out8042AuxCommand (ENABLE_CMD, FALSE);\r
+}\r
+\r
+/**\r
+ Get mouse packet . Only care first 3 bytes\r
+\r
+ @param MouseDev Pointer of PS2 Mouse Private Data Structure\r
+\r
+ @retval EFI_NOT_READY Mouse Device not ready to input data packet, or some error happened during getting the packet\r
+ @retval EFI_SUCCESS The data packet is gotten successfully.\r
+\r
+**/\r
+EFI_STATUS\r
+PS2MouseGetPacket (\r
+ PS2_MOUSE_DEV *MouseDev\r
+ )\r
+\r
+{\r
+ EFI_STATUS Status;\r
+ BOOLEAN KeyboardEnable;\r
+ UINT8 Packet[PS2_PACKET_LENGTH];\r
+ UINT8 Data;\r
+ UINTN Count;\r
+ UINTN State;\r
+ INT16 RelativeMovementX;\r
+ INT16 RelativeMovementY;\r
+ BOOLEAN LButton;\r
+ BOOLEAN RButton;\r
+\r
+ KeyboardEnable = FALSE;\r
+ Count = 1;\r
+ State = PS2_READ_BYTE_ONE;\r
+\r
+ //\r
+ // State machine to get mouse packet\r
+ //\r
+ while (1) {\r
+\r
+ switch (State) {\r
+ case PS2_READ_BYTE_ONE:\r
+ //\r
+ // Read mouse first byte data, if failed, immediately return\r
+ //\r
+ KbcDisableAux ();\r
+ Status = PS2MouseRead (&Data, &Count, State);\r
+ if (EFI_ERROR (Status)) {\r
+ KbcEnableAux ();\r
+ return EFI_NOT_READY;\r
+ }\r
+\r
+ if (Count != 1) {\r
+ KbcEnableAux ();\r
+ return EFI_NOT_READY;\r
+ }\r
+\r
+ if (IS_PS2_SYNC_BYTE (Data)) {\r
+ Packet[0] = Data;\r
+ State = PS2_READ_DATA_BYTE;\r
+\r
+ CheckKbStatus (&KeyboardEnable);\r
+ KbcDisableKb ();\r
+ KbcEnableAux ();\r
+ }\r
+ break;\r
+\r
+ case PS2_READ_DATA_BYTE:\r
+ Count = 2;\r
+ Status = PS2MouseRead ((Packet + 1), &Count, State);\r
+ if (EFI_ERROR (Status)) {\r
+ if (KeyboardEnable) {\r
+ KbcEnableKb ();\r
+ }\r
+\r
+ return EFI_NOT_READY;\r
+ }\r
+\r
+ if (Count != 2) {\r
+ if (KeyboardEnable) {\r
+ KbcEnableKb ();\r
+ }\r
+\r
+ return EFI_NOT_READY;\r
+ }\r
+\r
+ State = PS2_PROCESS_PACKET;\r
+ break;\r
+\r
+ case PS2_PROCESS_PACKET:\r
+ if (KeyboardEnable) {\r
+ KbcEnableKb ();\r
+ }\r
+ //\r
+ // Decode the packet\r
+ //\r
+ RelativeMovementX = Packet[1];\r
+ RelativeMovementY = Packet[2];\r
+ //\r
+ // Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0\r
+ // Byte 0 | Y overflow | X overflow | Y sign bit | X sign bit | Always 1 | Middle Btn | Right Btn | Left Btn\r
+ // Byte 1 | 8 bit X Movement\r
+ // Byte 2 | 8 bit Y Movement\r
+ //\r
+ // X sign bit + 8 bit X Movement : 9-bit signed twos complement integer that presents the relative displacement of the device in the X direction since the last data transmission.\r
+ // Y sign bit + 8 bit Y Movement : Same as X sign bit + 8 bit X Movement.\r
+ //\r
+ //\r
+ // First, Clear X and Y high 8 bits\r
+ //\r
+ RelativeMovementX = (INT16) (RelativeMovementX & 0xFF);\r
+ RelativeMovementY = (INT16) (RelativeMovementY & 0xFF);\r
+ //\r
+ // Second, if the 9-bit signed twos complement integer is negative, set the high 8 bit 0xff\r
+ //\r
+ if ((Packet[0] & 0x10) != 0) {\r
+ RelativeMovementX = (INT16) (RelativeMovementX | 0xFF00);\r
+ }\r
+ if ((Packet[0] & 0x20) != 0) {\r
+ RelativeMovementY = (INT16) (RelativeMovementY | 0xFF00);\r
+ }\r
+\r
+\r
+ RButton = (UINT8) (Packet[0] & 0x2);\r
+ LButton = (UINT8) (Packet[0] & 0x1);\r
+\r
+ //\r
+ // Update mouse state\r
+ //\r
+ MouseDev->State.RelativeMovementX += RelativeMovementX;\r
+ MouseDev->State.RelativeMovementY -= RelativeMovementY;\r
+ MouseDev->State.RightButton = (UINT8) (RButton ? TRUE : FALSE);\r
+ MouseDev->State.LeftButton = (UINT8) (LButton ? TRUE : FALSE);\r
+ MouseDev->StateChanged = TRUE;\r
+\r
+ return EFI_SUCCESS;\r
+ }\r
+ }\r
+}\r
+\r
+/**\r
+ Read data via IsaIo protocol with given number.\r
+\r
+ @param Buffer Buffer receive data of mouse\r
+ @param BufSize The size of buffer\r
+ @param State Check input or read data\r
+\r
+ @return status of reading mouse data.\r
+**/\r
+EFI_STATUS\r
+PS2MouseRead (\r
+ OUT UINT8 *Buffer,\r
+ IN OUT UINTN *BufSize,\r
+ IN UINTN State\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINTN BytesRead;\r
+\r
+ Status = EFI_SUCCESS;\r
+\r
+ if (State == PS2_READ_BYTE_ONE) {\r
+ //\r
+ // Check input for mouse\r
+ //\r
+ Status = CheckForInput ();\r
+\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ }\r
+\r
+ for (BytesRead = 0; BytesRead < *BufSize; BytesRead++) {\r
+\r
+ Status = WaitOutputFull (TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ break;\r
+ }\r
+ Buffer[BytesRead] = IoRead8 (KBC_DATA_PORT);\r
+ }\r
+ //\r
+ // Verify the correct number of bytes read\r
+ //\r
+ if (BytesRead == 0 || BytesRead != *BufSize) {\r
+ Status = EFI_NOT_FOUND;\r
+ }\r
+\r
+ *BufSize = BytesRead;\r
+ return Status;\r
+}\r
+\r
+//\r
+// 8042 I/O function\r
+//\r
+/**\r
+ I/O work flow of outing 8042 command.\r
+\r
+ @param Command I/O command.\r
+\r
+ @retval EFI_SUCCESS Success to excute I/O work flow\r
+ @retval EFI_TIMEOUT Keyboard controller time out.\r
+**/\r
+EFI_STATUS\r
+Out8042Command (\r
+ IN UINT8 Command\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+\r
+ //\r
+ // Wait keyboard controller input buffer empty\r
+ //\r
+ Status = WaitInputEmpty (TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ //\r
+ // Send command\r
+ //\r
+ IoWrite8 (KBC_CMD_STS_PORT, Command);\r
+\r
+ Status = WaitInputEmpty (TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ I/O work flow of outing 8042 data.\r
+\r
+ @param Data Data value\r
+\r
+ @retval EFI_SUCCESS Success to excute I/O work flow\r
+ @retval EFI_TIMEOUT Keyboard controller time out.\r
+**/\r
+EFI_STATUS\r
+Out8042Data (\r
+ IN UINT8 Data\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ //\r
+ // Wait keyboard controller input buffer empty\r
+ //\r
+ Status = WaitInputEmpty (TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ IoWrite8 (KBC_DATA_PORT, Data);\r
+ return WaitInputEmpty (TIMEOUT);\r
+}\r
+\r
+/**\r
+ I/O work flow of in 8042 data.\r
+\r
+ @param Data Data value\r
+\r
+ @retval EFI_SUCCESS Success to excute I/O work flow\r
+ @retval EFI_TIMEOUT Keyboard controller time out.\r
+**/\r
+EFI_STATUS\r
+In8042Data (\r
+ IN OUT UINT8 *Data\r
+ )\r
+{\r
+ UINTN Delay;\r
+\r
+ Delay = TIMEOUT / 50;\r
+\r
+ do {\r
+ //\r
+ // Check keyboard controller status bit 0(output buffer status)\r
+ //\r
+ if ((IoRead8 (KBC_CMD_STS_PORT) & KBC_OUTB) == KBC_OUTB) {\r
+ break;\r
+ }\r
+\r
+ gBS->Stall (50);\r
+ Delay--;\r
+ } while (Delay != 0);\r
+\r
+ if (Delay == 0) {\r
+ return EFI_TIMEOUT;\r
+ }\r
+\r
+ *Data = IoRead8 (KBC_DATA_PORT);\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ I/O work flow of outing 8042 Aux command.\r
+\r
+ @param Command Aux I/O command\r
+ @param Resend Whether need resend the Aux command.\r
+\r
+ @retval EFI_SUCCESS Success to excute I/O work flow\r
+ @retval EFI_TIMEOUT Keyboard controller time out.\r
+**/\r
+EFI_STATUS\r
+Out8042AuxCommand (\r
+ IN UINT8 Command,\r
+ IN BOOLEAN Resend\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINT8 Data;\r
+\r
+ //\r
+ // Wait keyboard controller input buffer empty\r
+ //\r
+ Status = WaitInputEmpty (TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ //\r
+ // Send write to auxiliary device command\r
+ //\r
+ IoWrite8 (KBC_CMD_STS_PORT, WRITE_AUX_DEV);\r
+\r
+ Status = WaitInputEmpty (TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ //\r
+ // Send auxiliary device command\r
+ //\r
+ IoWrite8 (KBC_DATA_PORT, Command);\r
+\r
+ //\r
+ // Read return code\r
+ //\r
+ Status = In8042AuxData (&Data);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ if (Data == PS2_ACK) {\r
+ //\r
+ // Receive mouse acknowledge, command send success\r
+ //\r
+ return EFI_SUCCESS;\r
+\r
+ } else if (Resend) {\r
+ //\r
+ // Resend fail\r
+ //\r
+ return EFI_DEVICE_ERROR;\r
+\r
+ } else if (Data == PS2_RESEND) {\r
+ //\r
+ // Resend command\r
+ //\r
+ Status = Out8042AuxCommand (Command, TRUE);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ } else {\r
+ //\r
+ // Invalid return code\r
+ //\r
+ return EFI_DEVICE_ERROR;\r
+\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ I/O work flow of outing 8042 Aux data.\r
+\r
+ @param Data Buffer holding return value\r
+\r
+ @retval EFI_SUCCESS Success to excute I/O work flow.\r
+ @retval EFI_TIMEOUT Keyboard controller time out.\r
+**/\r
+EFI_STATUS\r
+Out8042AuxData (\r
+ IN UINT8 Data\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ //\r
+ // Wait keyboard controller input buffer empty\r
+ //\r
+ Status = WaitInputEmpty (TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ //\r
+ // Send write to auxiliary device command\r
+ //\r
+ IoWrite8 (KBC_CMD_STS_PORT, WRITE_AUX_DEV);\r
+\r
+ Status = WaitInputEmpty (TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ IoWrite8 (KBC_DATA_PORT, Data);\r
+\r
+ Status = WaitInputEmpty (TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ I/O work flow of in 8042 Aux data.\r
+\r
+ @param Data Buffer holding return value.\r
+\r
+ @retval EFI_SUCCESS Success to excute I/O work flow\r
+ @retval EFI_TIMEOUT Keyboard controller time out.\r
+**/\r
+EFI_STATUS\r
+In8042AuxData (\r
+ IN OUT UINT8 *Data\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+\r
+ //\r
+ // wait for output data\r
+ //\r
+ Status = WaitOutputFull (BAT_TIMEOUT);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ *Data = IoRead8 (KBC_DATA_PORT);\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+\r
+/**\r
+ Check keyboard controller status, if it is output buffer full and for auxiliary device.\r
+\r
+ @retval EFI_SUCCESS Keyboard controller is ready\r
+ @retval EFI_NOT_READY Keyboard controller is not ready\r
+**/\r
+EFI_STATUS\r
+CheckForInput (\r
+ VOID\r
+ )\r
+{\r
+ UINT8 Data;\r
+\r
+ Data = IoRead8 (KBC_CMD_STS_PORT);\r
+\r
+ //\r
+ // Check keyboard controller status, if it is output buffer full and for auxiliary device\r
+ //\r
+ if ((Data & (KBC_OUTB | KBC_AUXB)) != (KBC_OUTB | KBC_AUXB)) {\r
+ return EFI_NOT_READY;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ I/O work flow to wait input buffer empty in given time.\r
+\r
+ @param Timeout Wating time.\r
+\r
+ @retval EFI_TIMEOUT if input is still not empty in given time.\r
+ @retval EFI_SUCCESS input is empty.\r
+**/\r
+EFI_STATUS\r
+WaitInputEmpty (\r
+ IN UINTN Timeout\r
+ )\r
+{\r
+ UINTN Delay;\r
+ UINT8 Data;\r
+\r
+ Delay = Timeout / 50;\r
+\r
+ do {\r
+ Data = IoRead8 (KBC_CMD_STS_PORT);\r
+\r
+ //\r
+ // Check keyboard controller status bit 1(input buffer status)\r
+ //\r
+ if ((Data & KBC_INPB) == 0) {\r
+ break;\r
+ }\r
+\r
+ gBS->Stall (50);\r
+ Delay--;\r
+ } while (Delay != 0);\r
+\r
+ if (Delay == 0) {\r
+ return EFI_TIMEOUT;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ I/O work flow to wait output buffer full in given time.\r
+\r
+ @param Timeout given time\r
+\r
+ @retval EFI_TIMEOUT output is not full in given time\r
+ @retval EFI_SUCCESS output is full in given time.\r
+**/\r
+EFI_STATUS\r
+WaitOutputFull (\r
+ IN UINTN Timeout\r
+ )\r
+{\r
+ UINTN Delay;\r
+ UINT8 Data;\r
+\r
+ Delay = Timeout / 50;\r
+\r
+ do {\r
+ Data = IoRead8 (KBC_CMD_STS_PORT);\r
+\r
+ //\r
+ // Check keyboard controller status bit 0(output buffer status)\r
+ // & bit5(output buffer for auxiliary device)\r
+ //\r
+ if ((Data & (KBC_OUTB | KBC_AUXB)) == (KBC_OUTB | KBC_AUXB)) {\r
+ break;\r
+ }\r
+\r
+ gBS->Stall (50);\r
+ Delay--;\r
+ } while (Delay != 0);\r
+\r
+ if (Delay == 0) {\r
+ return EFI_TIMEOUT;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
projects / mirror_edk2.git / blobdiff