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#include <linux/module.h>
#include <linux/ptrace.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
 
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/io.h>
 
#include "mouse.h"
 
static short old_x, old_y, old_b;
 
void mouse_rpc_irq (int irq, void *dev_id, struct pt_regs *regs)
{
	short x, y, b, dx, dy, db;
 
	x = (short)inl(IOMD_MOUSEX);
	y = (short)inl(IOMD_MOUSEY);
	b = (inl (0x800C4000) >> 4) & 7;
 
	dx = x - old_x;
	old_x = x;
	dy = y - old_y;
	old_y = y;
	db = b ^ old_b;
	old_b = b;
 
	if (dx || dy)
		add_mouse_movement(dx, dy);
	if (db)
		add_mouse_buttonchange(7, b);
}
 
void mouse_rpc_init(void)
{
	old_x = (short)inl(IOMD_MOUSEX);
	old_y = (short)inl(IOMD_MOUSEY);
	old_b = (inl (0x800C4000) >> 4) & 7;
	request_irq (IRQ_VSYNCPULSE, mouse_rpc_irq, SA_SHIRQ, "mouse", NULL);
}