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#include <string.h>
#include <idt.h>
#include <nullfs.h>
#include <thread.h>
#include <dev/pckbd.h>
#include <proto/keyboard.h>
#define PCKBD_BUF_LEN 16
kbd_event_t pckbd_buf[PCKBD_BUF_LEN];
int pckbd_buf_used = 0;
bool pckbd_escaped = false;
void irq1_handler(registers_t *regs) {
uint8_t scancode = inb(0x60);
if (scancode == 0xE0) {
pckbd_escaped = true;
} else {
kbd_event_t ev;
if (scancode & 0x80) {
if (pckbd_escaped) {
ev.scancode = scancode;
ev.type = KBD_EVENT_KEYRELEASE;
} else {
ev.scancode = scancode & 0x7F;
ev.type = KBD_EVENT_KEYRELEASE;
}
} else {
if (pckbd_escaped) {
ev.scancode = scancode | 0x80;
ev.type = KBD_EVENT_KEYPRESS;
} else {
ev.scancode = scancode;
ev.type = KBD_EVENT_KEYPRESS;
}
}
if (pckbd_buf_used < PCKBD_BUF_LEN) {
pckbd_buf[pckbd_buf_used++] = ev;
resume_on(&pckbd_buf);
}
pckbd_escaped = false;
}
}
// ---- VFS operations
bool pckbd_open(fs_node_t *n, int mode);
size_t pckbd_read(fs_handle_t *h, size_t offset, size_t len, char *buf);
int pckbd_poll(fs_handle_t *h, void** out_wait_obj);
void pckbd_close(fs_handle_t *h);
int pckbd_ioctl(fs_handle_t *h, int command, void* data);
bool pckbd_stat(fs_node_t *n, stat_t *st);
fs_node_ops_t pckbd_ops = {
.open = pckbd_open,
.read = pckbd_read,
.write = 0,
.readdir = 0,
.poll = pckbd_poll,
.close = pckbd_close,
.ioctl = pckbd_ioctl,
.stat = pckbd_stat,
.walk = 0,
.delete = 0,
.move = 0,
.create = 0,
.dispose = 0,
};
void pckbd_setup(fs_t *iofs) {
idt_set_irq_handler(IRQ1, &irq1_handler);
nullfs_add_node(iofs, "/input/pckbd", 0, &pckbd_ops, 0);
}
bool pckbd_open(fs_node_t *n, int mode) {
return (mode == FM_READ);
}
size_t pckbd_read(fs_handle_t *h, size_t offset, size_t len, char *buf) {
int ret = 0;
int st = enter_critical(CL_NOINT);
while (len - ret >= sizeof(kbd_event_t) && pckbd_buf_used > 0) {
memcpy(buf + ret, &pckbd_buf[0], sizeof(kbd_event_t));
for (int i = 1; i < pckbd_buf_used; i++) {
pckbd_buf[i-1] = pckbd_buf[i];
}
pckbd_buf_used--;
ret += sizeof(kbd_event_t);
}
exit_critical(st);
return ret;
}
int pckbd_poll(fs_handle_t *h, void** out_wait_obj) {
*out_wait_obj = &pckbd_buf;
return (pckbd_buf_used > 0 ? SEL_READ : 0);
}
void pckbd_close(fs_handle_t *h) {
return; // nothing to do
}
int pckbd_ioctl(fs_handle_t *h, int command, void* data) {
if (command == IOCTL_KBD_SET_LEDS) {
uint8_t leds = (uint32_t)data & 0x07;
outb(0x60, leds);
return 1;
}
return 0;
}
bool pckbd_stat(fs_node_t *n, stat_t *st) {
st->type = FT_CHARDEV;
st->size = 0;
st->access = FM_READ;
return true;
}
/* vim: set ts=4 sw=4 tw=0 noet :*/
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