From d255839400f91c13d00b02e6f169404d0295470a Mon Sep 17 00:00:00 2001
From: Malo Lecomte <malo.lecomte@epita.fr>
Date: Fri, 16 Jul 2021 03:24:01 +0200
Subject: [PATCH] feat(keyboard): add getkey function

---
 k/idt.c          | 19 ++++++++++++++++++-
 k/pic/keyboard.c | 13 +++++++++++++
 k/pic/keyboard.h | 13 +++++++++++++
 3 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 k/pic/keyboard.c
 create mode 100644 k/pic/keyboard.h

diff --git a/k/idt.c b/k/idt.c
index 0197e15..db4ab15 100644
--- a/k/idt.c
+++ b/k/idt.c
@@ -1,5 +1,8 @@
 #include "idt.h"
 #include "stdio.h"
+#include "pic.h"
+#include "io.h"
+#include "pic/keyboard.h"
 
 static struct idt idt = { 0 };
 
@@ -27,8 +30,22 @@ static struct idt_entry_info infos[] = {
 
 void handle_interrupt(struct int_args *args)
 {
+    if (args->int_code >= 32)
+    {
+        int8_t key = getkey();
+        if (key >= 0)
+        {
+            printf("%d\r\n", key);
+        }
+
+        outb(MASTER_PORT_A, OCW2_EOI);
+
+        return;
+    }
+
     printf("INTERRUPT: %d, error code: %d\r\n", args->int_code, args->err_code);
-    return;
+
+    asm volatile("cli; hlt");
 }
 
 static struct idt_entry create_idt_entry(uint32_t offset,
diff --git a/k/pic/keyboard.c b/k/pic/keyboard.c
new file mode 100644
index 0000000..d4bfd08
--- /dev/null
+++ b/k/pic/keyboard.c
@@ -0,0 +1,13 @@
+#include "pic/keyboard.h"
+#include "io.h"
+#include "stdio.h"
+
+int8_t getkey(void)
+{
+    uint8_t key = inb(KEYBOARD_IO);
+
+    if (key & KEYBOARD_RELEASE)
+        return -1;
+
+    return key;
+}
diff --git a/k/pic/keyboard.h b/k/pic/keyboard.h
new file mode 100644
index 0000000..dd09e7d
--- /dev/null
+++ b/k/pic/keyboard.h
@@ -0,0 +1,13 @@
+#ifndef KEYBOARD_H
+#define KEYBOARD_H
+
+#define KEYBOARD_IO     0x60
+#define KEYBOARD_STATUS 0x64
+
+#define KEYBOARD_RELEASE 0x80
+
+#include <stdint.h>
+
+int8_t getkey(void);
+
+#endif /* !KEYBOARD_H */