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#include <panic.h>
#include <arch/i686/drivers/ps2ctrl.h>
#include <arch/i686/pic.h>
#include <arch/i686/asm.h>
#include <drivers/ps2mouse.h>
static bool is_init = false;
static struct MouseEvent last_event;
static uint8_t first_b, second_b, third_b;
void ps2mouse_init(void) {
is_init = false;
pic_mask(12);
uint8_t result;
ps2ctrl_set_port2();
ps2ctrl_out_data(0xFF);
result = ps2ctrl_in();
if (result != 0xFA) {
panic("Failed to reset PS/2 mouse: expected 0xFA, got 0x%X", result);
return;
}
result = ps2ctrl_in();
if (result != 0xAA) {
panic("Failed to reset PS/2 mouse: expected 0xAA, got 0x%X", result);
return;
}
ps2ctrl_set_port2();
ps2ctrl_out_data(0xF4);
pic_unmask(12);
is_init = true;
}
static uint8_t packet_num = 0;
void ps2mouse_recv(void) {
if (!ps2ctrl_is_init() || !is_init) {
inb(0x60);
return;
}
uint8_t packet = ps2ctrl_in();
switch (packet_num) {
case 0:
first_b = packet;
break;
case 1:
second_b = packet;
break;
case 2: {
third_b = packet;
int state, d;
state = first_b;
d = second_b;
last_event.relx = d - ((state << 4) & 0x100);
d = third_b;
last_event.rely = d - ((state << 3) & 0x100);
last_event.lmb = first_b & 0x01;
last_event.rmb = first_b & 0x02;
last_event.mmb = first_b & 0x04;
last_event.updated = true;
break;
}
}
packet_num += 1;
packet_num %= 3;
}
struct MouseEvent ps2mouse_get(void) {
struct MouseEvent event = last_event;
last_event.updated = false;
return event;
}
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