docs: misc-devices/c2port.txt: convert to ReST format

.. SPDX-License-Identifier: GPL-2.0

.. include:: <isonum.txt>

===============

C2 port support

			---------------

===============

(C) Copyright 2007 Rodolfo Giometti <giometti@enneenne.com>

----------------

Once the driver is loaded you can use sysfs support to get C2port's

info or read/write in-system flash.

info or read/write in-system flash::

  # ls /sys/class/c2port/c2port0/

  access            flash_block_size  flash_erase       rev_id

Initially the C2port access is disabled since you hardware may have

such lines multiplexed with other devices so, to get access to the

C2port, you need the command:

C2port, you need the command::

  # echo 1 > /sys/class/c2port/c2port0/access

after that you should read the device ID and revision ID of the

connected micro controller:

connected micro controller::

  # cat /sys/class/c2port/c2port0/dev_id

  8

  1

However, for security reasons, the in-system flash access in not

enabled yet, to do so you need the command:

enabled yet, to do so you need the command::

  # echo 1 > /sys/class/c2port/c2port0/flash_access

After that you can read the whole flash:

After that you can read the whole flash::

  # cat /sys/class/c2port/c2port0/flash_data > image

erase it:

erase it::

  # echo 1 > /sys/class/c2port/c2port0/flash_erase

and write it:

and write it::

  # cat image > /sys/class/c2port/c2port0/flash_data

after writing you have to reset the device to execute the new code:

after writing you have to reset the device to execute the new code::

  # echo 1 > /sys/class/c2port/c2port0/reset

   ad525x_dpot

   eeprom

   c2port

   ibmvmc

   ics932s401

   isl29003