|author||Simon Arlott <email@example.com>||2007-05-10 23:04:09 -0700|
|committer||Greg Kroah-Hartman <firstname.lastname@example.org>||2007-06-08 16:24:31 -0700|
USB: cxacru: add Documentation file
The sysfs attributes for exposing cxacru statistics/status information with possible values is now explained in Documentation/networking/cxacru.txt including information on the writable adsl_state attribute's commands and a sample of the kernel log format. Signed-off-by: Simon Arlott <email@example.com> Cc: Duncan Sands <firstname.lastname@example.org> Signed-off-by: Andrew Morton <email@example.com> Signed-off-by: Greg Kroah-Hartman <firstname.lastname@example.org>
Diffstat (limited to 'Documentation/networking/cxacru.txt')
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diff --git a/Documentation/networking/cxacru.txt b/Documentation/networking/cxacru.txt
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+Firmware is required for this device: http://accessrunner.sourceforge.net/
+While it is capable of managing/maintaining the ADSL connection without the
+module loaded, the device will sometimes stop responding after unloading the
+driver and it is necessary to unplug/remove power to the device to fix this.
+Detected devices will appear as ATM devices named "cxacru". In /sys/class/atm/
+these are directories named cxacruN where N is the device number. A symlink
+named device points to the USB interface device's directory which contains
+several sysfs attribute files for retrieving device statistics:
+ Information about the remote headend.
+* downstream_attenuation (dB)
+* downstream_rate (kbps)
+* downstream_snr_margin (dB)
+ Downstream stats.
+* upstream_attenuation (dB)
+* upstream_rate (kbps)
+* upstream_snr_margin (dB)
+* transmitter_power (dBm/Hz)
+ Upstream stats.
+ Error counts.
+ Indicates that ADSL support on the device
+ is/can be enabled, see adsl_start.
+ "attempting to activate"
+ "channel analysis"
+ Changes between "down" and "attempting to activate"
+ if there is no signal.
+ "not connected"
+ "ANSI T1.413"
+ "ITU-T G.992.1 (G.DMT)"
+ "ITU-T G.992.2 (G.LITE)"
+ Count of total attempts to initialise ADSL.
+To enable/disable ADSL, the following can be written to the adsl_state file:
+ "restart" (stops, waits 1.5s, then starts)
+ "poll" (used to resume status polling if it was disabled due to failure)
+Changes in adsl/line state are reported via kernel log messages:
+ [4942145.150704] ATM dev 0: ADSL state: running
+ [4942243.663766] ATM dev 0: ADSL line: down
+ [4942249.665075] ATM dev 0: ADSL line: attempting to activate
+ [4942253.654954] ATM dev 0: ADSL line: training
+ [4942255.666387] ATM dev 0: ADSL line: channel analysis
+ [4942259.656262] ATM dev 0: ADSL line: exchange
+ [2635357.696901] ATM dev 0: ADSL line: up (8128 kb/s down | 832 kb/s up)