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Diffstat (limited to 'Documentation/misc-devices/c2port.txt')
| -rw-r--r-- | Documentation/misc-devices/c2port.txt | 90 |
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 ea7344465610..000000000000 --- a/Documentation/misc-devices/c2port.txt +++ /dev/null @@ -1,90 +0,0 @@ - C2 port support - --------------- - -(C) Copyright 2007 Rodolfo Giometti <giometti@enneenne.com> - -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 -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - - - -Overview --------- - -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. - -References ----------- - -The C2 Interface main references are at (http://www.silabs.com) -Silicon Laboratories site], see: - -- AN127: FLASH Programming via the C2 Interface at -http://www.silabs.com/Support Documents/TechnicalDocs/an127.pdf - -- C2 Specification at -http://www.silabs.com/pages/DownloadDoc.aspx?FILEURL=Support%20Documents/TechnicalDocs/an127.pdf&src=SearchResults - -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 -add. - -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 -8 -# cat /sys/class/c2port/c2port0/rev_id -1 - -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 |