Just add missing comments.

mentos/inc/drivers/keyboard/keymap.h

@@ -40,8 +40,10 @@ keymap_type_t get_keymap_type();
 /// @param type The type to set.
 void set_keymap_type(keymap_type_t type);
 
-/// @brief Returns the current keymap.
-/// @return Pointer to the current keymap.
+
+/// @brief Returns the current keymap for the given scancode.
+/// @param scancode the scancode we want.
+/// @return Pointer to the keymap.
 const keymap_t *get_keymap(int scancode);
 
 /// @brief Initializes the supported keymaps.

mentos/inc/drivers/ps2.h

@@ -9,6 +9,10 @@
 /// @return 0 on success, 1 on failure.
 int ps2_initialize();
 
+/// @brief Writes data to the PS/2 port.
+/// @param data the data to write.
 void ps2_write(unsigned char data);
 
+/// @brief Reads data from the PS/2 port.
+/// @return the data coming from the PS/2 port.
 unsigned char ps2_read();

mentos/src/drivers/ps2.c

@@ -17,9 +17,9 @@
 #include "io/debug.h"
 #include "stdbool.h"
 
-#define PS2_DATA    0x60
-#define PS2_STATUS  0x64
-#define PS2_COMMAND 0x64
+#define PS2_DATA    0x60 ///< Data signal line.
+#define PS2_STATUS  0x64 ///< Status signal line.
+#define PS2_COMMAND 0x64 ///< Command signal line.
 
 #define PS2_CTRL_TEST_CONTROLLER 0xAA ///< Test PS/2 Controller. 0x55 passed, 0xFC failed.
 #define PS2_CTRL_P1_ENABLE       0xAE ///< Enable first PS/2 port. No response.
@@ -29,12 +29,12 @@
 #define PS2_CTRL_P2_DISABLE      0xA7 ///< Disable second PS/2 port. No response.
 #define PS2_CTRL_P2_TEST         0xA9 ///< Test second PS/2 port (only if 2 PS/2 ports supported).
 
-#define PS2_TEST_SUCCESS 0xAA
-#define PS2_ECHO_RES     0xEE
-#define PS2_ACK          0xFA
-#define PS2_TEST_FAIL1   0xFC
-#define PS2_TEST_FAIL2   0xFD
-#define PS2_RESEND       0xFE
+#define PS2_TEST_SUCCESS 0xAA ///< Self test passed (sent after "0xFF (reset)" command or keyboard power up).
+#define PS2_ECHO_RES     0xEE ///< Response to "0xEE (echo)" command.
+#define PS2_ACK          0xFA ///< Command acknowledged (ACK).
+#define PS2_TEST_FAIL1   0xFC ///< Self test failed (sent after "0xFF (reset)" command or keyboard power up).
+#define PS2_TEST_FAIL2   0xFD ///< Self test failed (sent after "0xFF (reset)" command or keyboard power up).
+#define PS2_RESEND       0xFE ///< Resend (keyboard wants controller to repeat last command it sent).
 
 // PS/2 Controller Configuration Byte
 // Bit | Meaning

mentos/src/fs/ext2.c

@@ -10,7 +10,7 @@
 /// Change the header.
 #define __DEBUG_HEADER__ "[EXT2  ]"
 /// Set the log level.
-#define __DEBUG_LEVEL__ LOGLEVEL_NOTICE
+#define __DEBUG_LEVEL__ LOGLEVEL_DEBUG
 
 #include "process/scheduler.h"
 #include "process/process.h"

mentos/src/io/proc_video.c

@@ -24,6 +24,8 @@
 #include "ctype.h"
 #include "process/scheduler.h"
 
+/// @brief Prints the ring-buffer.
+/// @param rb the ring-buffer to print.
 void print_rb(fs_rb_scancode_t *rb)
 {
     if (!fs_rb_scancode_empty(rb)) {