mirror of
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148 lines
4.6 KiB
C
148 lines
4.6 KiB
C
/*
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* PROJECT: ReactOS KDBG Kernel Debugger Terminal Driver
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: PS/2 Keyboard driver
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* COPYRIGHT: Copyright 2001 David Welch <welch@cwcom.net>
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* Copyright 2004 Art Yerkes <ayerkes@speakeasy.net>
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* Copyright 2005 Gregor Anich <blight@blight.eu.org>
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* Copyright 2009-2011 Dmitry Gorbachev <gorbachev@reactos.org>
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*
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* NOTE: Adapted from historic PS/2 keyboard driver authored by
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* Victor Kirhenshtein <sauros@iname.com> and Jason Filby <jasonfilby@yahoo.com>
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#define KBD_STATUS_REG 0x64
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#define KBD_CNTL_REG 0x64
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#define KBD_DATA_REG 0x60
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#define KBD_STAT_OBF 0x01
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#define KBD_STAT_IBF 0x02
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#define CTRL_WRITE_MOUSE 0xD4
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#define MOU_ENAB 0xF4
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#define MOU_DISAB 0xF5
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#define MOUSE_ACK 0xFA
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#define KBD_DISABLE_MOUSE 0xA7
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#define KBD_ENABLE_MOUSE 0xA8
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#define kbd_write_command(cmd) WRITE_PORT_UCHAR((PUCHAR)KBD_CNTL_REG,cmd)
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#define kbd_write_data(cmd) WRITE_PORT_UCHAR((PUCHAR)KBD_DATA_REG,cmd)
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#define kbd_read_input() READ_PORT_UCHAR((PUCHAR)KBD_DATA_REG)
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#define kbd_read_status() READ_PORT_UCHAR((PUCHAR)KBD_STATUS_REG)
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static unsigned char keyb_layout[2][128] =
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{
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"\000\0331234567890-=\177\t" /* 0x00 - 0x0f */
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"qwertyuiop[]\r\000as" /* 0x10 - 0x1f */
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"dfghjkl;'`\000\\zxcv" /* 0x20 - 0x2f */
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"bnm,./\000*\000 \000\201\202\203\204\205" /* 0x30 - 0x3f */
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"\206\207\210\211\212\000\000789-456+1" /* 0x40 - 0x4f */
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"230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */
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"\r\000/" /* 0x60 - 0x6f */
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,
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"\000\033!@#$%^&*()_+\177\t" /* 0x00 - 0x0f */
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"QWERTYUIOP{}\r\000AS" /* 0x10 - 0x1f */
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"DFGHJKL:\"`\000\\ZXCV" /* 0x20 - 0x2f */
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"BNM<>?\000*\000 \000\201\202\203\204\205" /* 0x30 - 0x3f */
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"\206\207\210\211\212\000\000789-456+1" /* 0x40 - 0x4f */
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"230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */
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"\r\000/" /* 0x60 - 0x6f */
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};
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typedef UCHAR byte_t;
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/* FUNCTIONS *****************************************************************/
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static VOID
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KbdSendCommandToMouse(UCHAR Command)
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{
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ULONG Retry = 20000;
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while (kbd_read_status() & KBD_STAT_OBF && Retry--)
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{
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kbd_read_input();
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KeStallExecutionProcessor(50);
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}
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Retry = 20000;
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while (kbd_read_status() & KBD_STAT_IBF && Retry--)
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KeStallExecutionProcessor(50);
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kbd_write_command(CTRL_WRITE_MOUSE);
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Retry = 20000;
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while (kbd_read_status() & KBD_STAT_IBF && Retry--)
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KeStallExecutionProcessor(50);
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kbd_write_data(Command);
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Retry = 20000;
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while (!(kbd_read_status() & KBD_STAT_OBF) && Retry--)
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KeStallExecutionProcessor(50);
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if (kbd_read_input() != MOUSE_ACK) { ; }
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return;
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}
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VOID KbdEnableMouse(VOID)
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{
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KbdSendCommandToMouse(MOU_ENAB);
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}
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VOID KbdDisableMouse(VOID)
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{
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KbdSendCommandToMouse(MOU_DISAB);
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}
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CHAR
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KdbpTryGetCharKeyboard(PULONG ScanCode, ULONG Retry)
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{
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static byte_t last_key = 0;
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static byte_t shift = 0;
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char c;
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BOOLEAN KeepRetrying = (Retry == 0);
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while (KeepRetrying || Retry-- > 0)
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{
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while (kbd_read_status() & KBD_STAT_OBF)
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{
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byte_t scancode;
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scancode = kbd_read_input();
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/* check for SHIFT-keys */
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if (((scancode & 0x7F) == 42) || ((scancode & 0x7F) == 54))
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{
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shift = !(scancode & 0x80);
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continue;
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}
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/* ignore all other RELEASED-codes */
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if (scancode & 0x80)
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{
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last_key = 0;
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}
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else if (last_key != scancode)
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{
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//printf("kbd: %d, %d, %c\n", scancode, last_key, keyb_layout[shift][scancode]);
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last_key = scancode;
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c = keyb_layout[shift][scancode];
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*ScanCode = scancode;
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if (c > 0)
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return c;
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}
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}
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}
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return -1;
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}
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/* EOF */
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