1,5 → 1,5 |
/* |
* Copyright (C) 2001-2004 Jakub Jermar |
* Copyright (C) 2006 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
31,59 → 31,17 |
*/ |
/** |
* @file |
* @brief i8042 processor driver. |
* |
* It takes care of low-level keyboard functions. |
* @brief Key processing. |
*/ |
|
#include <genarch/kbd/i8042.h> |
#include <genarch/kbd/key.h> |
#include <genarch/kbd/scanc.h> |
#include <genarch/kbd/scanc_pc.h> |
#include <arch/drivers/i8042.h> |
#include <arch/interrupt.h> |
#include <cpu.h> |
#include <arch/asm.h> |
#include <arch.h> |
#include <synch/spinlock.h> |
#include <console/chardev.h> |
#include <typedefs.h> |
#include <console/chardev.h> |
#include <console/console.h> |
#include <macros.h> |
#include <interrupt.h> |
|
/* Keyboard commands. */ |
#define KBD_ENABLE 0xf4 |
#define KBD_DISABLE 0xf5 |
#define KBD_ACK 0xfa |
|
/* |
* 60 Write 8042 Command Byte: next data byte written to port 60h is |
* placed in 8042 command register. Format: |
* |
* |7|6|5|4|3|2|1|0|8042 Command Byte |
* | | | | | | | `---- 1=enable output register full interrupt |
* | | | | | | `----- should be 0 |
* | | | | | `------ 1=set status register system, 0=clear |
* | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
* | | | `-------- disable keyboard I/O by driving clock line low |
* | | `--------- disable auxiliary device, drives clock line low |
* | `---------- IBM scancode translation 0=AT, 1=PC/XT |
* `----------- reserved, should be 0 |
*/ |
|
#define i8042_SET_COMMAND 0x60 |
#define i8042_COMMAND 0x69 |
|
#define i8042_BUFFER_FULL_MASK 0x01 |
#define i8042_WAIT_MASK 0x02 |
#define i8042_MOUSE_DATA 0x20 |
|
#define KEY_RELEASE 0x80 |
|
static void key_released(uint8_t sc); |
static void key_pressed(uint8_t sc); |
static char key_read(chardev_t *d); |
|
#define PRESSED_SHIFT (1<<0) |
#define PRESSED_CAPSLOCK (1<<1) |
#define LOCKED_CAPSLOCK (1<<0) |
96,92 → 54,6 |
static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
static volatile int lockflags; /**< Tracking of multiple keys lockings. */ |
|
static void i8042_suspend(chardev_t *); |
static void i8042_resume(chardev_t *); |
|
static chardev_t kbrd; |
static chardev_operations_t ops = { |
.suspend = i8042_suspend, |
.resume = i8042_resume, |
.read = key_read |
}; |
|
static void i8042_interrupt(int n, istate_t *istate); |
static void i8042_wait(void); |
|
static iroutine oldvector; |
/** Initialize keyboard and service interrupts using kernel routine */ |
void i8042_grab(void) |
{ |
oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt); |
i8042_wait(); |
i8042_command_write(i8042_SET_COMMAND); |
i8042_wait(); |
i8042_data_write(i8042_COMMAND); |
i8042_wait(); |
} |
/** Resume the former interrupt vector */ |
void i8042_release(void) |
{ |
if (oldvector) |
exc_register(VECTOR_KBD, "user_interrupt", oldvector); |
} |
|
/** Initialize i8042. */ |
void i8042_init(void) |
{ |
int i; |
|
i8042_grab(); |
/* Prevent user from accidentaly releasing calling i8042_resume |
* and disabling keyboard |
*/ |
oldvector = NULL; |
|
trap_virtual_enable_irqs(1<<IRQ_KBD); |
chardev_initialize("i8042_kbd", &kbrd, &ops); |
stdin = &kbrd; |
|
/* |
* Clear input buffer. |
* Number of iterations is limited to prevent infinite looping. |
*/ |
for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
i8042_data_read(); |
} |
} |
|
/** Process i8042 interrupt. |
* |
* @param n Interrupt vector. |
* @param istate Interrupted state. |
*/ |
void i8042_interrupt(int n, istate_t *istate) |
{ |
uint8_t x; |
uint8_t status; |
|
while (((status=i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
x = i8042_data_read(); |
|
if ((status & i8042_MOUSE_DATA)) |
continue; |
|
if (x & KEY_RELEASE) |
key_released(x ^ KEY_RELEASE); |
else |
key_pressed(x); |
} |
trap_virtual_eoi(); |
} |
|
/** Wait until the controller reads its data. */ |
void i8042_wait(void) { |
while (i8042_status_read() & i8042_WAIT_MASK) { |
/* wait */ |
} |
} |
|
/** Process release of key. |
* |
* @param sc Scancode of the key being released. |
279,18 → 151,8 |
spinlock_unlock(&keylock); |
} |
|
/* Called from getc(). */ |
void i8042_resume(chardev_t *d) |
uint8_t active_read_buff_read(void) |
{ |
} |
|
/* Called from getc(). */ |
void i8042_suspend(chardev_t *d) |
{ |
} |
|
static uint8_t active_read_buff_read(void) |
{ |
static int i=0; |
i &= (ACTIVE_READ_BUFF_SIZE-1); |
if(!active_read_buff[i]) { |
299,7 → 161,7 |
return active_read_buff[i++]; |
} |
|
static void active_read_buff_write(uint8_t ch) |
void active_read_buff_write(uint8_t ch) |
{ |
static int i=0; |
active_read_buff[i] = ch; |
309,7 → 171,7 |
} |
|
|
static void active_read_key_pressed(uint8_t sc) |
void active_read_key_pressed(uint8_t sc) |
{ |
char *map = sc_primary_map; |
char ascii = sc_primary_map[sc]; |
378,39 → 240,5 |
|
} |
|
static char key_read(chardev_t *d) |
{ |
char ch; |
|
while(!(ch = active_read_buff_read())) { |
uint8_t x; |
while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
; |
x = i8042_data_read(); |
if (x & KEY_RELEASE) |
key_released(x ^ KEY_RELEASE); |
else |
active_read_key_pressed(x); |
} |
return ch; |
} |
|
/** Poll for key press and release events. |
* |
* This function can be used to implement keyboard polling. |
*/ |
void i8042_poll(void) |
{ |
uint8_t x; |
|
while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
x = i8042_data_read(); |
if (x & KEY_RELEASE) |
key_released(x ^ KEY_RELEASE); |
else |
key_pressed(x); |
} |
} |
|
/** @} |
*/ |