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ftdi: allow selecting device by usb bus location

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This patch adds a 'ftdi_location' command to select an adapter by usb
bus number and port path.

This is helpful if you have a rack full of adapters in a testing or
manufacturing setup where the only constant is the physical usb bus
location of the adapter you want to address. Vid:Pid are not unique,
serial number _may_ be unique (and maybe not with embedded adapters) but
will change when a new target is plugged.

Specifying a location allows to understand instantly which board failed
bringup or testing.

Change-Id: I403c7c6c8e34fe42041b3f967db80f3160a4f1a3
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/3351
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
This commit is contained in:
Matthias Welwarsky
2016-02-02 17:03:08 +01:00
committed by Paul Fertser
parent 73b676c2fd
commit 0a97b232b1
4 changed files with 96 additions and 8 deletions
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doc/openocd.texi
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@@ -2558,6 +2558,14 @@ If not specified, serial numbers are not considered.
and are not restricted to containing only decimal digits.)
@end deffn
@deffn {Config Command} {ftdi_location} <bus>:<port>[,<port>]...
Specifies the physical USB port of the adapter to use. The path
roots at @var{bus} and walks down the physical ports, with each
@var{port} option specifying a deeper level in the bus topology, the last
@var{port} denoting where the target adapter is actually plugged.
The USB bus topology can be queried with the command @emph{lsusb -t}.
@end deffn
@deffn {Config Command} {ftdi_channel} channel
Selects the channel of the FTDI device to use for MPSSE operations. Most
adapters use the default, channel 0, but there are exceptions.