diff --git a/server/drivers/joy.c b/server/drivers/joy.c
index ee1ddb6..bfb4d7a 100644
--- a/server/drivers/joy.c
+++ b/server/drivers/joy.c
@@ -70,9 +70,12 @@ MODULE_EXPORT int supports_multiple = 0;
 MODULE_EXPORT char *symbol_prefix = "joy_";
 
 
-////////////////////////////////////////////////////////////
-// init() should set up any device-specific stuff, and
-// point all the function pointers.
+/**
+ * Initialize the driver.
+ * \param drvthis  Pointer to driver structure.
+ * \retval 0   Success.
+ * \retval <0  Error.
+ */
 MODULE_EXPORT int
 joy_init (Driver *drvthis)
 {
@@ -177,6 +180,10 @@ joy_init (Driver *drvthis)
 }
 
 
+/**
+ * Close the driver (do necessary clean-up).
+ * \param drvthis  Pointer to driver structure.
+ */
 MODULE_EXPORT void
 joy_close (Driver *drvthis)
 {
@@ -197,11 +204,13 @@ joy_close (Driver *drvthis)
 }
 
 
-//////////////////////////////////////////////////////////////////////
-// Tries to read a character from an input device...
-//
-// Return NULL0 for "nothing available".
-//
+/**
+ * Get key from the joystick.
+ * Map the joystick events (move, button press) to a key.
+ * \param drvthis  Pointer to driver structure.
+ * \return         String representation of the key;
+ *                 \c NULL for nothing available / error.
+ */
 MODULE_EXPORT const char *
 joy_get_key (Driver *drvthis)
 {