/** @file
  PS2 Mouse Communication Interface 

Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef _COMMPS2_H_
#define _COMMPS2_H_

#define PS2_PACKET_LENGTH       3
#define PS2_SYNC_MASK           0xc
#define PS2_SYNC_BYTE           0x8

#define IS_PS2_SYNC_BYTE(byte)  ((byte & PS2_SYNC_MASK) == PS2_SYNC_BYTE)

#define PS2_READ_BYTE_ONE       0
#define PS2_READ_DATA_BYTE      1
#define PS2_PROCESS_PACKET      2

#define TIMEOUT                 50000
#define BAT_TIMEOUT             500000

//
// 8042 I/O Port
//
#define KBC_DATA_PORT     0x60
#define KBC_CMD_STS_PORT  0x64

//
// 8042 Command
//
#define READ_CMD_BYTE   0x20
#define WRITE_CMD_BYTE  0x60
#define DISABLE_AUX     0xa7
#define ENABLE_AUX      0xa8
#define SELF_TEST       0xaa
#define DISABLE_KB      0xad
#define ENABLE_KB       0xae
#define WRITE_AUX_DEV   0xd4

#define CMD_SYS_FLAG    0x04
#define CMD_KB_STS      0x10
#define CMD_KB_DIS      0x10
#define CMD_KB_EN       0x0

//
// 8042 Auxiliary Device Command
//
#define SETSF1_CMD  0xe6
#define SETSF2_CMD  0xe7
#define SETRE_CMD   0xe8
#define READ_CMD    0xeb
#define SETRM_CMD   0xf0
#define SETSR_CMD   0xf3
#define ENABLE_CMD  0xf4
#define DISABLE_CMD 0xf5
#define RESET_CMD   0xff

//
// return code
//
#define PS2_ACK       0xfa
#define PS2_RESEND    0xfe
#define PS2MOUSE_BAT1 0xaa
#define PS2MOUSE_BAT2 0x0

//
// Keyboard Controller Status
//
///
/// Parity Error
///
#define KBC_PARE  0x80  
///
/// General Time Out
///
#define KBC_TIM   0x40  
///
/// Output buffer for auxiliary device (PS/2):
///    0 - Holds keyboard data
///    1 - Holds data for auxiliary device
///
#define KBC_AUXB  0x20  
///
/// Keyboard lock status:
///    0 - keyboard locked
///    1 - keyboard free
///
#define KBC_KEYL  0x10 
///
/// Command/Data:
///    0 - data byte written via port 60h
///    1 - command byte written via port 64h
///
#define KBC_CD  0x08
///
/// System Flag:
///    0 - power-on reset
///    1 - self-test successful
///
#define KBC_SYSF  0x04  
///
/// Input Buffer Status :
///    0 - input buffer empty
///    1 - CPU data in input buffer
///
#define KBC_INPB  0x02  
///
/// Output Buffer Status :
///    0 - output buffer empty
///    1 - keyboard controller data in output buffer
///
#define KBC_OUTB  0x01  

/**
  Issue self test command via IsaIo interface.
  
  @param IsaIo Pointer to instance of EFI_ISA_IO_PROTOCOL
  
  @return EFI_SUCCESS  Success to do keyboard self testing.
  @return others       Fail to do keyboard self testing.
**/
EFI_STATUS
KbcSelfTest (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo
  );

/**
  Issue command to enable keyboard AUX functionality.
  
  @param IsaIo  Pointer to instance of EFI_ISA_IO_PROTOCOL
  
  @return Status of command issuing.
**/
EFI_STATUS
KbcEnableAux (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo
  );

/**
  Issue command to disable keyboard AUX functionality.
  
  @param IsaIo  Pointer to instance of EFI_ISA_IO_PROTOCOL
  
  @return Status of command issuing.
**/
EFI_STATUS
KbcDisableAux (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo
  );

/**
  Issue command to enable keyboard.
  
  @param IsaIo  Pointer to instance of EFI_ISA_IO_PROTOCOL
  
  @return Status of command issuing.
**/
EFI_STATUS
KbcEnableKb (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo
  );

/**
  Issue command to disable keyboard.
  
  @param IsaIo  Pointer to instance of EFI_ISA_IO_PROTOCOL
  
  @return Status of command issuing.
**/
EFI_STATUS
KbcDisableKb (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo
  );

/**
  Issue command to check keyboard status.
  
  @param IsaIo          Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param KeyboardEnable return whether keyboard is enable.
  
  @return Status of command issuing.
**/
EFI_STATUS
CheckKbStatus (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  OUT BOOLEAN                             *KeyboardEnable
  );

/**
  Issue command to reset keyboard.
  
  @param IsaIo  Pointer to instance of EFI_ISA_IO_PROTOCOL
  
  @return Status of command issuing.
**/
EFI_STATUS
PS2MouseReset (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo
  );

/**
  Issue command to set mouse's sample rate
  
  @param IsaIo  Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param SampleRate value of sample rate 
  
  @return Status of command issuing.
**/
EFI_STATUS
PS2MouseSetSampleRate (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN MOUSE_SR                             SampleRate
  );

/**
  Issue command to set mouse's resolution.
  
  @param IsaIo  Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param Resolution value of resolution
  
  @return Status of command issuing.
**/
EFI_STATUS
PS2MouseSetResolution (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN MOUSE_RE                             Resolution
  );

/**
  Issue command to set mouse's scaling.
  
  @param IsaIo  Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param Scaling value of scaling
  
  @return Status of command issuing.
**/
EFI_STATUS
PS2MouseSetScaling (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN MOUSE_SF                             Scaling
  );

/**
  Issue command to enable Ps2 mouse.
  
  @param IsaIo  Pointer to instance of EFI_ISA_IO_PROTOCOL
  
  @return Status of command issuing.
**/
EFI_STATUS
PS2MouseEnable (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo
  );

/**
  Get mouse packet . Only care first 3 bytes

  @param MouseDev  Pointer of PS2 Mouse Private Data Structure 

  @retval EFI_NOT_READY  Mouse Device not ready to input data packet, or some error happened during getting the packet
  @retval EFI_SUCCESS    The data packet is gotten successfully.

**/
EFI_STATUS
PS2MouseGetPacket (
  PS2_MOUSE_DEV     *MouseDev
  );

/**
  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
  );

//
// 8042 I/O function
//
/**
  I/O work flow of outing 8042 command.
  
  @param IsaIo   Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param Command I/O command.
  
  @retval EFI_SUCCESS Success to excute I/O work flow
  @retval EFI_TIMEOUT Keyboard controller time out.
**/
EFI_STATUS
Out8042Command (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN UINT8                                Command
  );

/**
  I/O work flow of in 8042 data.
  
  @param IsaIo   Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param Data    Data value
  
  @retval EFI_SUCCESS Success to excute I/O work flow
  @retval EFI_TIMEOUT Keyboard controller time out.
**/
EFI_STATUS
In8042Data (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN OUT UINT8                            *Data
  );

/**
  I/O work flow of outing 8042 data.
  
  @param IsaIo   Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param Data    Data value
  
  @retval EFI_SUCCESS Success to excute I/O work flow
  @retval EFI_TIMEOUT Keyboard controller time out.
**/
EFI_STATUS
Out8042Data (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN UINT8                                Data
  );

/**
  I/O work flow of outing 8042 Aux command.
  
  @param IsaIo   Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param Command Aux I/O command
  @param Resend  Whether need resend the Aux command.
  
  @retval EFI_SUCCESS Success to excute I/O work flow
  @retval EFI_TIMEOUT Keyboard controller time out.
**/
EFI_STATUS
Out8042AuxCommand (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN UINT8                                Command,
  IN BOOLEAN                              Resend
  );

/**
  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
  );

/**
  I/O work flow of outing 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
Out8042AuxData (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN UINT8                                Data
  );

/**
  Check keyboard controller status, if it is output buffer full and for auxiliary device.
  
  @param IsaIo   Pointer to instance of EFI_ISA_IO_PROTOCOL
  
  @retval EFI_SUCCESS   Keyboard controller is ready
  @retval EFI_NOT_READY Keyboard controller is not ready
**/
EFI_STATUS
CheckForInput (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo
  );

/**
  I/O work flow to wait input buffer empty in given time.
  
  @param IsaIo   Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param Timeout Wating time.
  
  @retval EFI_TIMEOUT if input is still not empty in given time.
  @retval EFI_SUCCESS input is empty.
**/
EFI_STATUS
WaitInputEmpty (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN UINTN                                Timeout
  );

/**
  I/O work flow to wait output buffer full in given time.
  
  @param IsaIo   Pointer to instance of EFI_ISA_IO_PROTOCOL
  @param Timeout given time
  
  @retval EFI_TIMEOUT  output is not full in given time
  @retval EFI_SUCCESS  output is full in given time.
**/
EFI_STATUS
WaitOutputFull (
  IN EFI_ISA_IO_PROTOCOL                  *IsaIo,
  IN UINTN                                Timeout
  );

#endif

