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#include <cpu/idt.h>
#include <drivers/mouse.h>
#include <fs/devfs.h>
#include <fs/fifo.h>
#include <fs/vfs.h>
#include <interrupts.h>
#include <typedefs.h>
u8 mouse_cycle = 0;
u8 mouse_u8[3];
u8 mouse_x = 0;
u8 mouse_y = 0;
vfs_inode_t *mouse_inode;
vfs_fd_t *mouse_fd;
struct mouse_event {
u8 buttons;
u8 x;
u8 y;
};
int fs_mouse_has_data(vfs_inode_t *inode) {
FIFO_FILE *f = inode->internal_object;
return f->has_data;
}
int fs_mouse_write(u8 *buffer, u64 offset, u64 len, vfs_fd_t *fd) {
FIFO_FILE *f = fd->inode->internal_object;
return fifo_object_write(buffer, offset, len, f);
}
int fs_mouse_read(u8 *buffer, u64 offset, u64 len, vfs_fd_t *fd) {
FIFO_FILE *f = fd->inode->internal_object;
return fifo_object_read(buffer, offset, len, f);
}
void add_mouse(void) {
mouse_inode =
devfs_add_file("/mouse", fs_mouse_read, fs_mouse_write, NULL,
fs_mouse_has_data, always_can_write, FS_TYPE_CHAR_DEVICE);
mouse_inode->internal_object = create_fifo_object();
// Don't look at this
int fd = vfs_open("/dev/mouse", O_RDWR, 0);
mouse_fd = get_vfs_fd(fd, NULL);
relist_remove(¤t_task->file_descriptors, fd);
}
void what(registers_t *r) {
EOI(0xe);
}
void int_mouse(reg_t *r) {
(void)r;
EOI(12);
switch (mouse_cycle) {
case 0:
mouse_u8[0] = inb(0x60);
if (!(mouse_u8[0] & (1 << 3))) {
mouse_cycle = 0;
return;
}
mouse_cycle++;
break;
case 1:
mouse_u8[1] = inb(0x60);
mouse_cycle++;
break;
case 2:
mouse_u8[2] = inb(0x60);
mouse_x = mouse_u8[1];
mouse_y = mouse_u8[2];
mouse_cycle = 0;
struct mouse_event e;
e.buttons = mouse_u8[0];
e.x = mouse_x;
e.y = mouse_y;
raw_vfs_pwrite(mouse_fd, &e, sizeof(e), 0);
break;
}
}
void mouse_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;
}
}
void mouse_write(u8 a_write) {
// Wait to be able to send a command
mouse_wait(1);
// Tell the mouse we are sending a command
outb(0x64, 0xD4);
// Wait for the final part
mouse_wait(1);
// Finally write
outb(0x60, a_write);
}
u8 mouse_read() {
mouse_wait(0);
return inb(0x60);
}
void install_mouse(void) {
u8 _status;
disable_interrupts();
// Enable the auxiliary mouse device
mouse_wait(1);
outb(0x64, 0xA8);
// Enable the interrupts
mouse_wait(1);
outb(0x64, 0x20);
mouse_wait(0);
_status = (inb(0x60) | 2);
mouse_wait(1);
outb(0x64, 0x60);
mouse_wait(1);
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
install_handler((interrupt_handler)int_mouse, INT_32_INTERRUPT_GATE(0x3),
12 + 0x20);
install_handler((interrupt_handler)what, INT_32_INTERRUPT_GATE(0x3),
0xe + 0x20);
install_handler((interrupt_handler)what, INT_32_INTERRUPT_GATE(0x3),
0xf + 0x20);
}
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