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/*
* Copyright (C) 2001-2004 Jakub Jermar
* Copyright (C) 2006 Josef Cejka
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch/kbd.h>
#include <key_buffer.h>
#include <ipc.h>
#define SPECIAL '?'
#define KEY_RELEASE 0x80
/**
* These codes read from i8042 data register are silently ignored.
*/
#define IGNORE_CODE 0x7f
#define PRESSED_SHIFT (1<<0)
#define PRESSED_CAPSLOCK (1<<1)
#define LOCKED_CAPSLOCK (1<<0)
/** Scancodes. */
#define SC_ESC 0x01
#define SC_BACKSPACE 0x0e
#define SC_LSHIFT 0x2a
#define SC_RSHIFT 0x36
#define SC_CAPSLOCK 0x3a
#define SC_SPEC_ESCAPE 0xe0
#define SC_LEFTARR 0x4b
#define SC_RIGHTARR 0x4d
#define SC_UPARR 0x48
#define SC_DOWNARR 0x50
#define SC_DELETE 0x53
#define SC_HOME 0x47
#define SC_END 0x4f
static volatile int keyflags; /**< Tracking of multiple keypresses. */
static volatile int lockflags; /**< Tracking of multiple keys lockings. */
/** Primary meaning of scancodes. */
static char sc_primary_map[] = {
SPECIAL, /* 0x00 */
SPECIAL, /* 0x01 - Esc */
'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
'\b', /* 0x0e - Backspace */
'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
SPECIAL, /* 0x1d - LCtrl */
'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
'`',
SPECIAL, /* 0x2a - LShift */
'\\',
'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
SPECIAL, /* 0x36 - RShift */
'*',
SPECIAL, /* 0x38 - LAlt */
' ',
SPECIAL, /* 0x3a - CapsLock */
SPECIAL, /* 0x3b - F1 */
SPECIAL, /* 0x3c - F2 */
SPECIAL, /* 0x3d - F3 */
SPECIAL, /* 0x3e - F4 */
SPECIAL, /* 0x3f - F5 */
SPECIAL, /* 0x40 - F6 */
SPECIAL, /* 0x41 - F7 */
SPECIAL, /* 0x42 - F8 */
SPECIAL, /* 0x43 - F9 */
SPECIAL, /* 0x44 - F10 */
SPECIAL, /* 0x45 - NumLock */
SPECIAL, /* 0x46 - ScrollLock */
'7', '8', '9', '-',
'4', '5', '6', '+',
'1', '2', '3',
'0', '.',
SPECIAL, /* 0x54 - Alt-SysRq */
SPECIAL, /* 0x55 - F11/F12/PF1/FN */
SPECIAL, /* 0x56 - unlabelled key next to LAlt */
SPECIAL, /* 0x57 - F11 */
SPECIAL, /* 0x58 - F12 */
SPECIAL, /* 0x59 */
SPECIAL, /* 0x5a */
SPECIAL, /* 0x5b */
SPECIAL, /* 0x5c */
SPECIAL, /* 0x5d */
SPECIAL, /* 0x5e */
SPECIAL, /* 0x5f */
SPECIAL, /* 0x60 */
SPECIAL, /* 0x61 */
SPECIAL, /* 0x62 */
SPECIAL, /* 0x63 */
SPECIAL, /* 0x64 */
SPECIAL, /* 0x65 */
SPECIAL, /* 0x66 */
SPECIAL, /* 0x67 */
SPECIAL, /* 0x68 */
SPECIAL, /* 0x69 */
SPECIAL, /* 0x6a */
SPECIAL, /* 0x6b */
SPECIAL, /* 0x6c */
SPECIAL, /* 0x6d */
SPECIAL, /* 0x6e */
SPECIAL, /* 0x6f */
SPECIAL, /* 0x70 */
SPECIAL, /* 0x71 */
SPECIAL, /* 0x72 */
SPECIAL, /* 0x73 */
SPECIAL, /* 0x74 */
SPECIAL, /* 0x75 */
SPECIAL, /* 0x76 */
SPECIAL, /* 0x77 */
SPECIAL, /* 0x78 */
SPECIAL, /* 0x79 */
SPECIAL, /* 0x7a */
SPECIAL, /* 0x7b */
SPECIAL, /* 0x7c */
SPECIAL, /* 0x7d */
SPECIAL, /* 0x7e */
SPECIAL, /* 0x7f */
};
/** Secondary meaning of scancodes. */
static char sc_secondary_map[] = {
SPECIAL, /* 0x00 */
SPECIAL, /* 0x01 - Esc */
'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
SPECIAL, /* 0x0e - Backspace */
'\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
SPECIAL, /* 0x1d - LCtrl */
'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
'~',
SPECIAL, /* 0x2a - LShift */
'|',
'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
SPECIAL, /* 0x36 - RShift */
'*',
SPECIAL, /* 0x38 - LAlt */
' ',
SPECIAL, /* 0x3a - CapsLock */
SPECIAL, /* 0x3b - F1 */
SPECIAL, /* 0x3c - F2 */
SPECIAL, /* 0x3d - F3 */
SPECIAL, /* 0x3e - F4 */
SPECIAL, /* 0x3f - F5 */
SPECIAL, /* 0x40 - F6 */
SPECIAL, /* 0x41 - F7 */
SPECIAL, /* 0x42 - F8 */
SPECIAL, /* 0x43 - F9 */
SPECIAL, /* 0x44 - F10 */
SPECIAL, /* 0x45 - NumLock */
SPECIAL, /* 0x46 - ScrollLock */
'7', '8', '9', '-',
'4', '5', '6', '+',
'1', '2', '3',
'0', '.',
SPECIAL, /* 0x54 - Alt-SysRq */
SPECIAL, /* 0x55 - F11/F12/PF1/FN */
SPECIAL, /* 0x56 - unlabelled key next to LAlt */
SPECIAL, /* 0x57 - F11 */
SPECIAL, /* 0x58 - F12 */
SPECIAL, /* 0x59 */
SPECIAL, /* 0x5a */
SPECIAL, /* 0x5b */
SPECIAL, /* 0x5c */
SPECIAL, /* 0x5d */
SPECIAL, /* 0x5e */
SPECIAL, /* 0x5f */
SPECIAL, /* 0x60 */
SPECIAL, /* 0x61 */
SPECIAL, /* 0x62 */
SPECIAL, /* 0x63 */
SPECIAL, /* 0x64 */
SPECIAL, /* 0x65 */
SPECIAL, /* 0x66 */
SPECIAL, /* 0x67 */
SPECIAL, /* 0x68 */
SPECIAL, /* 0x69 */
SPECIAL, /* 0x6a */
SPECIAL, /* 0x6b */
SPECIAL, /* 0x6c */
SPECIAL, /* 0x6d */
SPECIAL, /* 0x6e */
SPECIAL, /* 0x6f */
SPECIAL, /* 0x70 */
SPECIAL, /* 0x71 */
SPECIAL, /* 0x72 */
SPECIAL, /* 0x73 */
SPECIAL, /* 0x74 */
SPECIAL, /* 0x75 */
SPECIAL, /* 0x76 */
SPECIAL, /* 0x77 */
SPECIAL, /* 0x78 */
SPECIAL, /* 0x79 */
SPECIAL, /* 0x7a */
SPECIAL, /* 0x7b */
SPECIAL, /* 0x7c */
SPECIAL, /* 0x7d */
SPECIAL, /* 0x7e */
SPECIAL, /* 0x7f */
};
irq_cmd_t i8042_cmds[1] = {
{ CMD_PORT_READ_1, (void *)0x60, 0 }
};
irq_code_t i8042_kbd = {
1,
i8042_cmds
};
static int key_released(unsigned char key)
{
switch (key) {
case SC_LSHIFT:
case SC_RSHIFT:
keyflags &= ~PRESSED_SHIFT;
break;
case SC_CAPSLOCK:
keyflags &= ~PRESSED_CAPSLOCK;
if (lockflags & LOCKED_CAPSLOCK)
lockflags &= ~LOCKED_CAPSLOCK;
else
lockflags |= LOCKED_CAPSLOCK;
break;
default:
break;
}
}
static int key_pressed(unsigned char key)
{
char *map = sc_primary_map;
char ascii = sc_primary_map[key];
char shift, capslock;
char letter = 0;
switch (key) {
case SC_LSHIFT:
case SC_RSHIFT:
keyflags |= PRESSED_SHIFT;
break;
case SC_CAPSLOCK:
keyflags |= PRESSED_CAPSLOCK;
break;
case SC_SPEC_ESCAPE:
break;
case SC_LEFTARR:
if (key_buffer_available() >= 3) {
key_buffer_push(0x1b);
key_buffer_push(0x5b);
key_buffer_push(0x44);
}
break;
case SC_RIGHTARR:
if (key_buffer_available() >= 3) {
key_buffer_push(0x1b);
key_buffer_push(0x5b);
key_buffer_push(0x43);
}
break;
case SC_UPARR:
if (key_buffer_available() >= 3) {
key_buffer_push(0x1b);
key_buffer_push(0x5b);
key_buffer_push(0x41);
}
break;
case SC_DOWNARR:
if (key_buffer_available() >= 3) {
key_buffer_push(0x1b);
key_buffer_push(0x5b);
key_buffer_push(0x42);
}
break;
case SC_HOME:
if (key_buffer_available() >= 3) {
key_buffer_push(0x1b);
key_buffer_push(0x4f);
key_buffer_push(0x48);
}
break;
case SC_END:
if (key_buffer_available() >= 3) {
key_buffer_push(0x1b);
key_buffer_push(0x4f);
key_buffer_push(0x46);
}
break;
case SC_DELETE:
if (key_buffer_available() >= 4) {
key_buffer_push(0x1b);
key_buffer_push(0x5b);
key_buffer_push(0x33);
key_buffer_push(0x7e);
}
break;
default:
letter = ((ascii >= 'a') && (ascii <= 'z'));
capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
shift = keyflags & PRESSED_SHIFT;
if (letter && capslock)
shift = !shift;
if (shift)
map = sc_secondary_map;
key_buffer_push(map[key]);
break;
}
}
/** Register uspace irq handler
* @return
*/
int kbd_arch_init(void)
{
return !(ipc_register_irq(1, &i8042_kbd));
}
int kbd_arch_process(int scan_code)
{
if (scan_code != IGNORE_CODE) {
if (scan_code & KEY_RELEASE)
key_released(scan_code ^ KEY_RELEASE);
else
key_pressed(scan_code);
}
return 1;
}