path: root/Documentation/misc-devices/c2port.txt
diff options
Diffstat (limited to 'Documentation/misc-devices/c2port.txt')
1 files changed, 0 insertions, 90 deletions
diff --git a/Documentation/misc-devices/c2port.txt b/Documentation/misc-devices/c2port.txt
deleted file mode 100644
index ea73444..0000000
--- a/Documentation/misc-devices/c2port.txt
+++ /dev/null
@@ -1,90 +0,0 @@
- C2 port support
- ---------------
-(C) Copyright 2007 Rodolfo Giometti <>
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-GNU General Public License for more details.
-This driver implements the support for Linux of Silicon Labs (Silabs)
-C2 Interface used for in-system programming of micro controllers.
-By using this driver you can reprogram the in-system flash without EC2
-or EC3 debug adapter. This solution is also useful in those systems
-where the micro controller is connected via special GPIOs pins.
-The C2 Interface main references are at (
-Silicon Laboratories site], see:
-- AN127: FLASH Programming via the C2 Interface at
- Documents/TechnicalDocs/an127.pdf
-- C2 Specification at
-however it implements a two wire serial communication protocol (bit
-banging) designed to enable in-system programming, debugging, and
-boundary-scan testing on low pin-count Silicon Labs devices. Currently
-this code supports only flash programming but extensions are easy to
-Using the driver
-Once the driver is loaded you can use sysfs support to get C2port's
-info or read/write in-system flash.
-# ls /sys/class/c2port/c2port0/
-access flash_block_size flash_erase rev_id
-dev_id flash_blocks_num flash_size subsystem/
-flash_access flash_data reset uevent
-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:
-# echo 1 > /sys/class/c2port/c2port0/access
-after that you should read the device ID and revision ID of the
-connected micro controller:
-# cat /sys/class/c2port/c2port0/dev_id
-# cat /sys/class/c2port/c2port0/rev_id
-However, for security reasons, the in-system flash access in not
-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:
-# cat /sys/class/c2port/c2port0/flash_data > image
-erase it:
-# echo 1 > /sys/class/c2port/c2port0/flash_erase
-and write it:
-# cat image > /sys/class/c2port/c2port0/flash_data
-after writing you have to reset the device to execute the new code:
-# echo 1 > /sys/class/c2port/c2port0/reset