= Writing Device Drivers for HelenOS =

== Overview of Drivers in HelenOS ==

== DDF (Device Driver Framework) ==

== DDF Driver Structure ==

 * #include <ddf/driver.h>
 * driver_t
 * driver_ops_t
 * ddf_dev_ops_t

== Device and Function Life Cycle ==

 * ddf_fun_create()
 * ddf_fun_destroy()
 * ddf_fun_add_match_id()
 * ddf_fun_add_to_category()
 * ddf_fun_bind()
 * ddf_fun_unbind()
 * ddf_fun_online()
 * ddf_fun_offline()

== Soft State Management ==

 * ddf_dev_data_alloc()
 * ddf_fun_data_alloc()

== Exposing Driver Services to Clients ==

== Traditional I/O Device Drivers ==

=== Programmed I/O ===
=== Interrupts ===
=== DMA ===

== USB Device Drivers ==