#include <ntoskrnl.h>

Include dependency graph for kdps2kbd.c:

Macros
#define	KBD_STATUS_REG 0x64

#define	KBD_CNTL_REG 0x64

#define	KBD_DATA_REG 0x60

#define	KBD_STAT_OBF 0x01

#define	KBD_STAT_IBF 0x02

#define	CTRL_WRITE_MOUSE 0xD4

#define	MOU_ENAB 0xF4

#define	MOU_DISAB 0xF5

#define	MOUSE_ACK 0xFA

#define	KBD_DISABLE_MOUSE 0xA7

#define	KBD_ENABLE_MOUSE 0xA8

#define	kbd_write_command(cmd) WRITE_PORT_UCHAR((PUCHAR)KBD_CNTL_REG,cmd)

#define	kbd_write_data(cmd) WRITE_PORT_UCHAR((PUCHAR)KBD_DATA_REG,cmd)

#define	kbd_read_input() READ_PORT_UCHAR((PUCHAR)KBD_DATA_REG)

#define	kbd_read_status() READ_PORT_UCHAR((PUCHAR)KBD_STATUS_REG)

Typedefs
typedef UCHAR	byte_t

Functions
static VOID	KbdSendCommandToMouse (UCHAR Command)

VOID	KbdEnableMouse (VOID)

VOID	KbdDisableMouse (VOID)

CHAR	KdbpTryGetCharKeyboard (PULONG ScanCode, ULONG Retry)

Variables
static unsigned char	keyb_layout [2][128]

Macro Definition Documentation

◆ CTRL_WRITE_MOUSE

#define CTRL_WRITE_MOUSE 0xD4

Definition at line 25 of file kdps2kbd.c.

◆ KBD_CNTL_REG

#define KBD_CNTL_REG 0x64

Definition at line 19 of file kdps2kbd.c.

◆ KBD_DATA_REG

#define KBD_DATA_REG 0x60

Definition at line 20 of file kdps2kbd.c.

◆ KBD_DISABLE_MOUSE

#define KBD_DISABLE_MOUSE 0xA7

Definition at line 30 of file kdps2kbd.c.

◆ KBD_ENABLE_MOUSE

#define KBD_ENABLE_MOUSE 0xA8

Definition at line 31 of file kdps2kbd.c.

◆ kbd_read_input

#define kbd_read_input ( ) READ_PORT_UCHAR((PUCHAR)KBD_DATA_REG)

Definition at line 35 of file kdps2kbd.c.

◆ kbd_read_status

#define kbd_read_status ( ) READ_PORT_UCHAR((PUCHAR)KBD_STATUS_REG)

Definition at line 36 of file kdps2kbd.c.

◆ KBD_STAT_IBF

#define KBD_STAT_IBF 0x02

Definition at line 23 of file kdps2kbd.c.

◆ KBD_STAT_OBF

#define KBD_STAT_OBF 0x01

Definition at line 22 of file kdps2kbd.c.

◆ KBD_STATUS_REG

#define KBD_STATUS_REG 0x64

Definition at line 18 of file kdps2kbd.c.

◆ kbd_write_command

#define kbd_write_command ( cmd ) WRITE_PORT_UCHAR((PUCHAR)KBD_CNTL_REG,cmd)

Definition at line 33 of file kdps2kbd.c.

◆ kbd_write_data

#define kbd_write_data ( cmd ) WRITE_PORT_UCHAR((PUCHAR)KBD_DATA_REG,cmd)

Definition at line 34 of file kdps2kbd.c.

◆ MOU_DISAB

#define MOU_DISAB 0xF5

Definition at line 27 of file kdps2kbd.c.

◆ MOU_ENAB

#define MOU_ENAB 0xF4

Definition at line 26 of file kdps2kbd.c.

◆ MOUSE_ACK

#define MOUSE_ACK 0xFA

Definition at line 28 of file kdps2kbd.c.

Typedef Documentation

◆ byte_t

typedef UCHAR byte_t

Definition at line 57 of file kdps2kbd.c.

Function Documentation

◆ KbdDisableMouse()

VOID KbdDisableMouse ( VOID )

Definition at line 98 of file kdps2kbd.c.

{
    KbdSendCommandToMouse(MOU_DISAB);
}

Referenced by KdbpInternalEnter(), and KdReceivePacket().

◆ KbdEnableMouse()

VOID KbdEnableMouse ( VOID )

Definition at line 93 of file kdps2kbd.c.

{
    KbdSendCommandToMouse(MOU_ENAB);
}

Referenced by KdbpInternalEnter(), and KdReceivePacket().

◆ KbdSendCommandToMouse()

static VOID KbdSendCommandToMouse ( UCHAR Command )

static

Definition at line 62 of file kdps2kbd.c.

{
    ULONG Retry = 20000;
 
    while (kbd_read_status() & KBD_STAT_OBF && Retry--)
    {
        kbd_read_input();
        KeStallExecutionProcessor(50);
    }
 
    Retry = 20000;
    while (kbd_read_status() & KBD_STAT_IBF && Retry--)
        KeStallExecutionProcessor(50);
 
    kbd_write_command(CTRL_WRITE_MOUSE);
 
    Retry = 20000;
    while (kbd_read_status() & KBD_STAT_IBF && Retry--)
        KeStallExecutionProcessor(50);
 
    kbd_write_data(Command);
 
    Retry = 20000;
    while (!(kbd_read_status() & KBD_STAT_OBF) && Retry--)
        KeStallExecutionProcessor(50);
 
    if (kbd_read_input() != MOUSE_ACK) { ; }
 
    return;
}

Referenced by KbdDisableMouse(), and KbdEnableMouse().

◆ KdbpTryGetCharKeyboard()

CHAR KdbpTryGetCharKeyboard	(	PULONG	ScanCode,
		ULONG	Retry
	)

Definition at line 104 of file kdps2kbd.c.

{
    static byte_t last_key = 0;
    static byte_t shift = 0;
    char c;
    BOOLEAN KeepRetrying = (Retry == 0);
 
    while (KeepRetrying || Retry-- > 0)
    {
        while (kbd_read_status() & KBD_STAT_OBF)
        {
            byte_t scancode;
 
            scancode = kbd_read_input();
 
            /* check for SHIFT-keys */
            if (((scancode & 0x7F) == 42) || ((scancode & 0x7F) == 54))
            {
                shift = !(scancode & 0x80);
                continue;
            }
 
            /* ignore all other RELEASED-codes */
            if (scancode & 0x80)
            {
                last_key = 0;
            }
            else if (last_key != scancode)
            {
                //printf("kbd: %d, %d, %c\n", scancode, last_key, keyb_layout[shift][scancode]);
                last_key = scancode;
                c = keyb_layout[shift][scancode];
                *ScanCode = scancode;
 
                if (c > 0)
                    return c;
            }
        }
    }
 
    return -1;
}

Referenced by KdpFlushTerminalInput(), and KdpReadTermKey().

Variable Documentation

◆ keyb_layout

unsigned char keyb_layout[2][128]