NAME

       superio — Super I/O controller and bus driver

SYNOPSIS

       To compile this driver into the kernel, place the following line in your kernel configuration file:

             device superio

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             superio_load="YES"

DESCRIPTION

       Super  I/O  is  an  I/O  controller  that combines various low-bandwidth devices that can be functionally
       unrelated otherwise.  A typical Super I/O can contain devices such as
       •   a floppy disk controller
       •   a parallel port
       •   a serial port
       •   a PS/2 mouse and keyboard controller
       •   a hardware monitoring controller
       •   a watchdog timer
       •   a controller for general purpose input-output

       The superio driver provides support for devices residing in the Super I/O controller  that  can  only  be
       accessed or discovered using the controller's interface.  Some of the Super I/O devices have standardized
       interfaces.  Such devices either use well-known legacy resources or they are advertised via ACPI or both.
       They  can  be  configured either using ISA bus hints or they are auto-configured by acpi(4).  The superio
       driver is not designed to interact with that kind of devices.  They can be handled  by  their  respective
       drivers  without  any  knowledge of the Super I/O specifics.  For instance, fdc(4) provides access to the
       floppy disk controller.

       There are other Super I/O devices that do not have any standardized interface.  Drivers for those devices
       can be written using facilities of the superio driver.

       The driver itself attaches to the ISA bus as all supported controllers are accessed via LPC I/O ports.

       The superio driver is unusual as it is both a controller driver for a variety of  Super  I/O  controllers
       and a bus driver for supported devices in those controllers.

HARDWARE

       The  superio  driver supports a multitude of Super I/O controllers produced by Nuvoton, formerly known as
       Winbond, and ITE.

SEE ALSO

       superio(9)

HISTORY

       The superio driver was written by Andriy Gapon <avg@FreeBSD.org>.

Debian                                          October 11, 2019                                      SUPERIO(4)