0,0 → 1,332 |
/* |
* Copyright (C) 2001-2004 Jakub Jermar |
* 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/i8042.h> |
#include <arch/i8259.h> |
#include <arch/interrupt.h> |
#include <cpu.h> |
#include <arch/asm.h> |
#include <arch.h> |
#include <print.h> |
#include <synch/spinlock.h> |
#include <typedefs.h> |
#include <console/chardev.h> |
#include <console/console.h> |
#include <macros.h> |
|
/** |
* i8042 processor driver. |
* It takes care of low-level keyboard functions. |
*/ |
|
#define i8042_DATA 0x60 |
#define i8042_STATUS 0x64 |
|
/** Keyboard commands. */ |
#define KBD_ENABLE 0xf4 |
#define KBD_DISABLE 0xf5 |
#define KBD_ACK 0xfa |
|
#define SPECIAL '?' |
#define KEY_RELEASE 0x80 |
|
static void key_released(__u8 sc); |
static void key_pressed(__u8 sc); |
|
#define PRESSED_SHIFT (1<<0) |
#define PRESSED_CAPSLOCK (1<<1) |
#define LOCKED_CAPSLOCK (1<<0) |
|
static spinlock_t keylock; /**< keylock protects keyflags and lockflags. */ |
static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
static volatile int lockflags; /**< Tracking of multiple keys lockings. */ |
|
static void i8042_suspend(void); |
static void i8042_resume(void); |
|
static chardev_t kbrd; |
static chardev_operations_t ops = { |
.suspend = i8042_suspend, |
.resume = i8042_resume |
}; |
|
/** Primary meaning of scancodes. */ |
static char sc_primary_map[] = { |
SPECIAL, /* 0x00 */ |
SPECIAL, /* 0x01 - Esc */ |
'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', |
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 */ |
}; |
|
/** 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 */ |
}; |
|
/** Initialize i8042. */ |
void i8042_init(void) |
{ |
trap_register(VECTOR_KBD, i8042_interrupt); |
trap_virtual_enable_irqs(1<<IRQ_KBD); |
spinlock_initialize(&keylock); |
chardev_initialize(&kbrd, &ops); |
stdin = &kbrd; |
} |
|
/** Process i8042 interrupt. |
* |
* @param n Interrupt vector. |
* @param stack Interrupted stack. |
*/ |
void i8042_interrupt(__u8 n, __native stack[]) |
{ |
__u8 x; |
|
trap_virtual_eoi(); |
x = inb(i8042_DATA); |
if (x & KEY_RELEASE) |
key_released(x ^ KEY_RELEASE); |
else |
key_pressed(x); |
} |
|
/** Process release of key. |
* |
* @param sc Scancode of the key being released. |
*/ |
void key_released(__u8 sc) |
{ |
spinlock_lock(&keylock); |
switch (sc) { |
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; |
} |
spinlock_unlock(&keylock); |
} |
|
/** Process keypress. |
* |
* @param sc Scancode of the key being pressed. |
*/ |
void key_pressed(__u8 sc) |
{ |
char *map = sc_primary_map; |
char ascii = sc_primary_map[sc]; |
bool shift, capslock; |
bool letter = false; |
|
spinlock_lock(&keylock); |
switch (sc) { |
case SC_LSHIFT: |
case SC_RSHIFT: |
keyflags |= PRESSED_SHIFT; |
break; |
case SC_CAPSLOCK: |
keyflags |= PRESSED_CAPSLOCK; |
break; |
default: |
letter = is_lower(ascii); |
capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
shift = keyflags & PRESSED_SHIFT; |
if (letter && capslock) |
shift = !shift; |
if (shift) |
map = sc_secondary_map; |
chardev_push_character(&kbrd, map[sc]); |
break; |
} |
spinlock_unlock(&keylock); |
} |
|
/* Called from getc(). */ |
void i8042_resume(void) |
{ |
} |
|
/* Called from getc(). */ |
void i8042_suspend(void) |
{ |
} |