os-k/kaleid/kernel/io/keyb.c

55 lines
2.3 KiB
C

//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: Basic Read Only Keyboard Driver //
// //
// //
// Copyright © 2018-2019 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
#include <kernel/iomisc.h>
extern void KeybIsr(void);
extern IdtRegisterIrq(void (*isr)(void), uchar irq, uchar flags);
void KeybSetup(void)
{
IdtRegisterIrq(KeybIsr, 0x21, 0x8E);
}
uchar KeybHandler(void)
{
uchar status;
uchar code;
// write EOI
IoWriteByteOnPort(0x20, 0x20);
status = IoReadByteFromPort(KeybStatusPort);
if (status & 0x01) {
code = IoReadByteFromPort(KeybDataPort);
if(code < 0) return 0;
return code;
}
}