feat: partially implement PS/2 input subsystem with keyboard and mouse support

This implementation is incomplete, and doesn't work, but it will soon, to be determined, hopefully, uh, yknow.

Signed-off-by kaguya <vpshinomiya@protonmail.com>

src/main.c

@@ -27,6 +27,8 @@
 #include "arch/x86_64/pci.h"
 #include "sound/hda.h"
 #include "sound/pcm.h"
+#include "arch/x86_64/ps2.h"
+#include "input/input.h"
 
 
 uintptr_t g_hhdm_offset;
@@ -201,6 +203,7 @@ void kmain(void) {
     x86_64_ISR_Initialize();
     x86_64_IRQ_Initialize();
     x86_64_PIT_Initialize(1000);
+    ps2_init();
     asm volatile("sti");
     calibrate_tsc();
     
@@ -446,6 +449,68 @@ void kmain(void) {
     //start_userspace();
     printf("tst");
 
+    printf("\n=== Input Subsystem Test ===\n");
+    printf("Opening /dev/input/event0...\n");
+
+    fd_t input_fd = VFS_Open("/dev/input/event0");
+    if (input_fd < 0) {
+        printf("Failed to open /dev/input/event0!\n");
+    } else {
+        printf("Successfully opened /dev/input/event0 (fd=%d)\n", input_fd);
+        printf("Press keys or move mouse... (press ESC to exit test)\n\n");
+
+        input_event_t ev;
+        bool running = true;
+
+        while (running) {
+            // Non-blocking read from the input device
+            int bytes = VFS_Read(input_fd, (uint8_t*)&ev, sizeof(input_event_t));
+            if (bytes == sizeof(input_event_t)) {
+                switch (ev.type) {
+                case INPUT_EV_KEY:
+                    printf("KEY: scancode=0x%02X ascii='%c' (%d) pressed=%s\n",
+                           ev.key.scancode,
+                           ev.key.ascii ? ev.key.ascii : '?',
+                           ev.key.ascii,
+                           ev.key.pressed ? "YES" : "NO");
+
+                    // Exit test on ESC key release
+                    if (ev.key.scancode == 0x01 && !ev.key.pressed) {
+                        printf("ESC pressed - exiting input test.\n");
+                        running = false;
+                    }
+                    break;
+
+                case INPUT_EV_MOUSE_REL:
+                    if (ev.rel.dx || ev.rel.dy) {
+                        printf("MOUSE MOVE: dx=%d dy=%d\n", ev.rel.dx, ev.rel.dy);
+                    }
+                    break;
+
+                case INPUT_EV_MOUSE_BTN:
+                    printf("MOUSE BTN: button=%d pressed=%s\n",
+                           ev.btn.button,
+                           ev.btn.pressed ? "YES" : "NO");
+                    break;
+
+                case INPUT_EV_MOUSE_WHEEL:
+                    printf("MOUSE WHEEL: delta=%d\n", ev.wheel.delta);
+                    break;
+
+                default:
+                    printf("Unknown event type %d\n", ev.type);
+                    break;
+                }
+            }
+
+            // Small yield so we don't spin the CPU too hard
+            // (you can replace with a proper sleep later)
+            asm volatile("pause");
+        }
+
+        VFS_Close(input_fd);
+        printf("Input test finished.\n");
+    }
 
     // We're done, just hang...
     hcf();