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//http://forum.osdev.org/viewtopic.php?t=10247
//based on Mouse.inc by SANiK
//License: Use as you wish, except to cause damage
#define FOOLOS_MODULE_NAME "mouse"
#include "lib/logger/log.h"
#include "lib/int/stdint.h"
#include "x86.h"
static volatile uint8_t mouse_cycle;
static volatile int8_t mouse_byte[3];
static volatile uint8_t mouse_x;
static volatile uint8_t mouse_y;
static volatile uint8_t mouse_a;
uint8_t mouse_read();
int8_t mouse_get_x()
{
return mouse_x;
}
int8_t mouse_get_y()
{
return mouse_y;
}
void mouse_init()
{
mouse_cycle=mouse_x=mouse_y=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
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Mouse Initialized");
}
void mouse_log()
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%d delta x: %d delta y: %d ",mouse_a, mouse_x,mouse_y);
}
//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_a=mouse_byte[0];
mouse_x=mouse_byte[1];
mouse_y=mouse_byte[2];
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);
}
inline 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);
}
inline 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;
}
}
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