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-rw-r--r--Documentation/misc-devices/c2port.rst (renamed from Documentation/misc-devices/c2port.txt)56
-rw-r--r--Documentation/misc-devices/index.rst1
2 files changed, 31 insertions, 26 deletions
diff --git a/Documentation/misc-devices/c2port.txt b/Documentation/misc-devices/c2port.rst
index 31351b1a5a1f..7e4f6a79418a 100644
--- a/Documentation/misc-devices/c2port.txt
+++ b/Documentation/misc-devices/c2port.rst
@@ -1,5 +1,9 @@
- C2 port support
- ---------------
+.. SPDX-License-Identifier: GPL-2.0
+.. include:: <isonum.txt>
+
+===============
+C2 port support
+===============
(C) Copyright 2007 Rodolfo Giometti <giometti@enneenne.com>
@@ -32,10 +36,10 @@ The C2 Interface main references are at (https://www.silabs.com)
Silicon Laboratories site], see:
- AN127: FLASH Programming via the C2 Interface at
-https://www.silabs.com/Support Documents/TechnicalDocs/an127.pdf
+ https://www.silabs.com/Support Documents/TechnicalDocs/an127.pdf
- C2 Specification at
-https://www.silabs.com/pages/DownloadDoc.aspx?FILEURL=Support%20Documents/TechnicalDocs/an127.pdf&src=SearchResults
+ https://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
@@ -47,44 +51,44 @@ Using the driver
----------------
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
-dev_id flash_blocks_num flash_size subsystem/
-flash_access flash_data reset uevent
+ # 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:
+C2port, you need the command::
-# echo 1 > /sys/class/c2port/c2port0/access
+ # 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
-# cat /sys/class/c2port/c2port0/rev_id
-1
+ # 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:
+enabled yet, to do so you need the command::
-# echo 1 > /sys/class/c2port/c2port0/flash_access
+ # 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
+ # cat /sys/class/c2port/c2port0/flash_data > image
-erase it:
+erase it::
-# echo 1 > /sys/class/c2port/c2port0/flash_erase
+ # echo 1 > /sys/class/c2port/c2port0/flash_erase
-and write it:
+and write it::
-# cat image > /sys/class/c2port/c2port0/flash_data
+ # 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
+ # echo 1 > /sys/class/c2port/c2port0/reset
diff --git a/Documentation/misc-devices/index.rst b/Documentation/misc-devices/index.rst
index d2e87f791821..27e268805067 100644
--- a/Documentation/misc-devices/index.rst
+++ b/Documentation/misc-devices/index.rst
@@ -16,6 +16,7 @@ fit into other categories.
ad525x_dpot
eeprom
+ c2port
ibmvmc
ics932s401
isl29003