Index: uspace/drv/usbhid/conv.c
===================================================================
--- uspace/drv/usbhid/conv.c	(revision 2b12f0605ffe523594f8bf20f2479e41083fb650)
+++ uspace/drv/usbhid/conv.c	(revision f4cf2813adedcc10945b511b682f5532189b12d2)
@@ -40,4 +40,8 @@
 #include "conv.h"
 
+/**
+ * Mapping between USB HID key codes (from HID Usage Tables) and corresponding
+ * HelenOS key codes.
+ */
 static int scanmap_simple[255] = {
 
@@ -163,4 +167,12 @@
 };
 
+/**
+ * Translate USB HID key codes (from HID Usage Tables) to generic key codes
+ * recognized by HelenOS.
+ *
+ * @param scancode USB HID key code (from HID Usage Tables).
+ * 
+ * @retval HelenOS key code corresponding to the given USB HID key code.
+ */
 unsigned int usbhid_parse_scancode(int scancode)
 {
Index: uspace/drv/usbhid/descdump.c
===================================================================
--- uspace/drv/usbhid/descdump.c	(revision 2b12f0605ffe523594f8bf20f2479e41083fb650)
+++ uspace/drv/usbhid/descdump.c	(revision f4cf2813adedcc10945b511b682f5532189b12d2)
@@ -44,4 +44,11 @@
 #define BYTES_PER_LINE 12
 
+/**
+ * Dumps the given buffer in hexadecimal format to standard output.
+ *
+ * @param msg Message to print before the buffer.
+ * @param buffer Buffer to print.
+ * @param length Size of the buffer in bytes.
+ */
 static void dump_buffer(const char *msg, const uint8_t *buffer, size_t length)
 {
@@ -62,4 +69,10 @@
 #define INDENT "  "
 
+/**
+ * Print standard configuration descriptor to standard output.
+ *
+ * @param index Index of the descriptor.
+ * @param d Standard configuration descriptor to print.
+ */
 void dump_standard_configuration_descriptor(
     int index, const usb_standard_configuration_descriptor_t *d)
@@ -84,4 +97,9 @@
 }
 
+/**
+ * Print standard interface descriptor to standard output.
+ *
+ * @param d Standard interface descriptor to print.
+ */
 void dump_standard_interface_descriptor(
     const usb_standard_interface_descriptor_t *d)
@@ -99,4 +117,9 @@
 }
 
+/**
+ * Print standard endpoint descriptor to standard output.
+ *
+ * @param d Standard endpoint descriptor to print.
+ */
 void dump_standard_endpoint_descriptor(
     const usb_standard_endpoint_descriptor_t *d)
@@ -126,4 +149,9 @@
 }
 
+/**
+ * Print standard HID descriptor to standard output.
+ *
+ * @param d Standard HID descriptor to print.
+ */
 void dump_standard_hid_descriptor_header(
     const usb_standard_hid_descriptor_t *d)
@@ -139,4 +167,10 @@
 }
 
+/**
+ * Print HID class-specific descriptor header (type and length) to standard 
+ * output.
+ * 
+ * @param d HID class-specific descriptor header to print.
+ */
 void dump_standard_hid_class_descriptor_info(
     const usb_standard_hid_class_descriptor_info_t *d)
@@ -146,4 +180,12 @@
 }
 
+/**
+ * Print HID class-specific descriptor (without the header) to standard output.
+ *
+ * @param index Index of the descriptor.
+ * @param type Type of the HID class-specific descriptor (Report or Physical).
+ * @param d HID class descriptor to print.
+ * @param size Size of the descriptor in bytes.
+ */
 void dump_hid_class_descriptor(int index, uint8_t type, 
     const uint8_t *d, size_t size )