Create ps2.h

kernel/ps2.h

@@ -0,0 +1,45 @@
+#ifndef PS2_H
+#define PS2_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/* I/O Ports */
+#define PS2_DATA_PORT       0x60
+#define PS2_STATUS_REG      0x64
+#define PS2_COMMAND_REG     0x64
+
+/* Status Register Bits */
+#define PS2_STATUS_OUTPUT   0x01 // 1 = Data ready to be read
+#define PS2_STATUS_INPUT    0x02 // 1 = Controller busy, don't write yet
+#define PS2_STATUS_SYS      0x04 // System flag
+#define PS2_STATUS_CMD_DATA 0x08 // 0 = Data written to 0x60, 1 = Cmd to 0x64
+#define PS2_STATUS_MOUSE    0x20 // 1 = Mouse data, 0 = Keyboard data
+
+/* Controller Commands */
+#define PS2_CMD_READ_CONFIG  0x20
+#define PS2_CMD_WRITE_CONFIG 0x60
+#define PS2_CMD_DISABLE_MS   0xA7
+#define PS2_CMD_ENABLE_MS    0xA8
+#define PS2_CMD_DISABLE_KB   0xAD
+#define PS2_CMD_ENABLE_KB    0xAE
+#define PS2_CMD_WRITE_MOUSE  0xD4
+
+/* Mouse Commands */
+#define MOUSE_CMD_SET_DEFAULTS 0xF6
+#define MOUSE_CMD_ENABLE_SCAN  0xF4
+
+typedef struct {
+    int8_t  x_delta;
+    int8_t  y_delta;
+    bool    left_button;
+    bool    right_button;
+    bool    middle_button;
+} mouse_state_t;
+
+/* Public API */
+void ps2_init(void);
+void ps2_keyboard_handler(void);
+void ps2_mouse_handler(void);
+
+#endif