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119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Desc: Basic Keyboard Driver //
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// //
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// //
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// Copyright © 2018-2019 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY//without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#include <lib/buf.h>
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#include <io/keyb.h>
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#include <ke/idt.h>
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#include "scan.c"
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static bool capsLockActive = 0;
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static bool leftAltPressed = 0;
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static bool leftShiftPressed = 0;
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static bool leftControlPressed = 0;
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void KeybPrint(uchar _code)
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{
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uint code = (uint)_code;
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const uint *table =
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(leftAltPressed ? LeftAltScanCodes
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: (leftShiftPressed ? LeftShiftScanCodes
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: (leftControlPressed ? LeftControlScanCodes
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: RegularScanCodes)));
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if (capsLockActive && !leftShiftPressed &&
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!!(table[2 * code + 1] & CAPSLOCK) && !leftAltPressed)
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table = LeftShiftScanCodes;
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uchar ch = table[2 * code];
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if (!ch) {
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switch (code) {
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case 0x38: leftAltPressed = 1; break;
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case 0xB8: leftAltPressed = 0; break;
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case 0x36: case 0x2A: leftShiftPressed = 1; break;
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case 0xB6: case 0xAA: leftShiftPressed = 0; break;
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case 0x1D: leftControlPressed = 1; break;
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case 0x9D: leftControlPressed = 0; break;
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case 0x3A: capsLockActive = !capsLockActive; break;
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}
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return;
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}
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bputc(BStdIn, ch);
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if (code && (table[2 * code + 1] & INVISIBLE) == 0) {
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bputc(BStdOut, table[2 * code]);
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BStdOut->flusher(BStdOut);
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}
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}
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static void KeybHandler(ISRFrame_t *regs)
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{
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char status;
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uchar code = 0;
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// write EOI
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IoWriteByteOnPort(0x20, 0x20);
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status = IoReadByteFromPort(0x64);
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if (status & 0x01) {
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code = IoReadByteFromPort(0x60);
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}
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KeybPrint(code);
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KeSendEOItoPIC(0x21);
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}
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void IoCreateInputBuffer(void)
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{
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error_t rc;
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rc = BOpenPureBuf(&BStdIn, BS_RDWR, 4 * KB);
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if (rc) KeStartPanic("[Keyb] Couldn't create BStdIn");
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//BEnableLineBuffering(BStdIn);
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BStdIn->flusher = bemptybuf;
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}
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void IoEnableKeyb(void)
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{
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ulong flags = KePauseIRQs();
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KeRegisterISR(KeybHandler, 0x21);
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char readedInterruptConfig = IoReadByteFromPort(0x21);
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IoWriteByteOnPort(0x21, 0xFD & readedInterruptConfig);
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KeRestoreIRQs(flags);
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KeEnableNMI();
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IoCreateInputBuffer();
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}
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