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#define FOOLOS_MODULE_NAME "mouse"
//http://forum.osdev.org/viewtopic.php?t=10247
//based on Mouse.inc by SANiK
//License: Use as you wish, except to cause damage
#include <stdint.h>
#include "asm/x86.h"
static volatile uint8_t mouse_cycle;
static volatile uint8_t mouse_byte[3];
volatile int16_t mouse_x;
volatile int16_t mouse_y;
static volatile uint8_t mouse_a;
uint8_t mouse_read();
void mouse_wait(uint8_t a_type) //unsigned char
{
uint32_t _time_out=100000; //unsigned int
if(a_type==0)
{
while(_time_out--) //Data
{
if((x86_inb(0x64) & 1)==1)
{
return;
}
}
return;
}
else
{
while(_time_out--) //Signal
{
if((x86_inb(0x64) & 2)==0)
{
return;
}
}
return;
}
}
void mouse_write(uint8_t a_write)
{
//Wait to be able to send a command
mouse_wait(1);
//Tell the mouse we are sending a command
x86_outb(0x64, 0xD4);
//Wait for the final part
mouse_wait(1);
//Finally write
x86_outb(0x60, a_write);
}
int8_t mouse_get_x()
{
return mouse_x;
}
int8_t mouse_get_y()
{
return mouse_y;
}
void mouse_init()
{
mouse_x=mouse_y=0;
mouse_cycle=0;
uint8_t _status; //unsigned char
//Enable the auxiliary mouse device
mouse_wait(1);
x86_outb(0x64, 0xA8);
//Enable the interrupts
mouse_wait(1);
x86_outb(0x64, 0x20);
mouse_wait(0);
_status=(x86_inb(0x60) | 2);
mouse_wait(1);
x86_outb(0x64, 0x60);
mouse_wait(1);
x86_outb(0x60, _status);
//Tell the mouse to use default settings
mouse_write(0xF6);
mouse_read(); //Acknowledge
//Enable the mouse
mouse_write(0xF4);
mouse_read(); //Acknowledge
}
void mouse_log()
{
//log(FOOLOS_MODULE_NAME,5,"%02x / %02x / %02x ",mouse_byte[0], mouse_byte[1],mouse_byte[2]);
//TODO: ignore last packet for 4packets mouse and resync if you get out of sync
if(mouse_byte[0]&0x80||mouse_byte[0]&0x40)return; //skip packet on overflow
if(!(mouse_byte[0]&0x8))panic(FOOLOS_MODULE_NAME,"mouse packets out of sync!?"); // this bit is always 1, otherwise panic!
//
if(mouse_byte[1]>127){
mouse_x-=256;
mouse_x+=mouse_byte[1];
}
else
{
mouse_x+=mouse_byte[1];
}
if(mouse_byte[2]>127){
mouse_y-=256;
mouse_y+=mouse_byte[2];
}
else
{
mouse_y+=mouse_byte[2];
}
if(mouse_x<0)mouse_x=0;
if(mouse_y<0)mouse_y=0;
if(mouse_x>800)mouse_x=800;
if(mouse_y>600)mouse_y=600;
//log(FOOLOS_MODULE_NAME,5,"%d / %d / %02x ",mouse_x, mouse_y,mouse_byte[2]);
if (mouse_byte[0] & 1)vesa_put_rect(mouse_x,600-mouse_y,10,10,0x00ffff);
//else vesa_put_rect(mouse_x,600-mouse_y,10,10,0x0000ff);
PutFont('X', mouse_x,600-mouse_y, 0xff0000);
}
//Mouse functions
void mouse_handler()//struct regs *a_r) //struct regs *a_r (not used but just there)
{
// X86_IRQ_BEGIN
switch(mouse_cycle)
{
case 0:
mouse_byte[0]=x86_inb(0x60);
mouse_cycle++;
break;
case 1:
mouse_byte[1]=x86_inb(0x60);
mouse_cycle++;
break;
case 2:
mouse_byte[2]=x86_inb(0x60);
mouse_cycle=0;
mouse_log();
break;
}
// X86_IRQ_END
}
uint8_t mouse_read()
{
//Get's response from mouse
mouse_wait(0);
return x86_inb(0x60);
}
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