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// MIT License, Copyright (c) 2020 Marvin Borner
#include <boot.h>
#include <cpu.h>
#include <fs.h>
#include <interrupts.h>
#include <mem.h>
#include <mouse.h>
#include <print.h>
#include <proc.h>
#include <stack.h>
#include <str.h>
#include <sys.h>
static char mouse_cycle = 0;
static char mouse_byte[3] = { 0 };
static struct stack *queue = NULL;
static u32 dev_id = 0;
static struct event_mouse *event = NULL;
static void mouse_handler(struct regs *r)
{
UNUSED(r);
switch (mouse_cycle) {
case 0:
mouse_byte[0] = (char)inb(0x60);
if (((mouse_byte[0] >> 3) & 1) == 1)
mouse_cycle++;
else
mouse_cycle = 0;
break;
case 1:
mouse_byte[1] = (char)inb(0x60);
mouse_cycle++;
break;
case 2:
mouse_byte[2] = (char)inb(0x60);
event = malloc(sizeof(*event));
event->magic = MOUSE_MAGIC;
event->diff_x = mouse_byte[1];
event->diff_y = mouse_byte[2];
event->but1 = mouse_byte[0] & 1;
event->but2 = (mouse_byte[0] >> 1) & 1;
event->but3 = (mouse_byte[0] >> 2) & 1;
stack_push_bot(queue, event);
mouse_cycle = 0;
proc_enable_waiting(dev_id, PROC_WAIT_DEV);
break;
default:
break;
}
}
static void mouse_serial_wait(u8 a_type)
{
u32 time_out = 100000;
if (a_type == 0) {
while (time_out--)
if ((inb(0x64) & 1) == 1)
return;
return;
} else {
while (time_out--)
if ((inb(0x64) & 2) == 0)
return;
return;
}
}
static void mouse_serial_write(u8 a_write)
{
mouse_serial_wait(1);
outb(0x64, 0xD4);
mouse_serial_wait(1);
outb(0x60, a_write);
}
static u8 mouse_serial_read(void)
{
mouse_serial_wait(0);
return inb(0x60);
}
static u8 mouse_ready(void)
{
return !stack_empty(queue);
}
static s32 mouse_read(void *buf, u32 offset, u32 count, struct device *dev)
{
(void)dev;
if (stack_empty(queue))
return -1;
struct event_mouse *e = stack_pop(queue);
memcpy(buf, (u8 *)e + offset, MIN(count, sizeof(*e)));
free(e);
return MIN(count, sizeof(*e));
}
void mouse_install(void)
{
u8 status;
// Enable auxiliary mouse device
mouse_serial_wait(1);
outb(0x64, 0xA8);
// Enable interrupts
mouse_serial_wait(1);
outb(0x64, 0x20);
mouse_serial_wait(0);
status = (u8)(inb(0x60) | 3);
mouse_serial_wait(1);
outb(0x64, 0x60);
mouse_serial_wait(1);
outb(0x60, status);
// Use default settings
mouse_serial_write(0xF6);
mouse_serial_read();
// Enable mousewheel
mouse_serial_write(0xF2);
mouse_serial_read();
mouse_serial_read();
mouse_serial_write(0xF3);
mouse_serial_read();
mouse_serial_write(200);
mouse_serial_read();
mouse_serial_write(0xF3);
mouse_serial_read();
mouse_serial_write(100);
mouse_serial_read();
mouse_serial_write(0xF3);
mouse_serial_read();
mouse_serial_write(80);
mouse_serial_read();
mouse_serial_write(0xF2);
mouse_serial_read();
status = (u8)mouse_serial_read();
if (status == 3) {
};
/* printf("Scrollwheel support!\n"); */
// Activate 4th and 5th mouse buttons
mouse_serial_write(0xF2);
mouse_serial_read();
mouse_serial_read();
mouse_serial_write(0xF3);
mouse_serial_read();
mouse_serial_write(200);
mouse_serial_read();
mouse_serial_write(0xF3);
mouse_serial_read();
mouse_serial_write(200);
mouse_serial_read();
mouse_serial_write(0xF3);
mouse_serial_read();
mouse_serial_write(80);
mouse_serial_read();
mouse_serial_write(0xF2);
mouse_serial_read();
status = (u8)mouse_serial_read();
if (status == 4) {
};
/* printf("4th and 5th mouse button support!\n"); */
/* TODO: Fix mouse laggyness
mouse_serial_write(0xE8);
mouse_serial_read();
mouse_serial_write(0x03);
mouse_serial_read();
mouse_serial_write(0xF3);
mouse_serial_read();
mouse_serial_write(200);
mouse_serial_read(); */
// Enable mouse
mouse_serial_write(0xF4);
mouse_serial_read();
// Setup the mouse handler
irq_install_handler(12, mouse_handler);
queue = stack_new();
struct device *dev = zalloc(sizeof(*dev));
dev->name = strdup("mouse");
dev->type = DEV_CHAR;
dev->read = mouse_read;
dev->ready = mouse_ready;
device_add(dev);
dev_id = dev->id;
}
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