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| author | Christian Poessinger <christian@poessinger.com> | 2020-06-07 14:04:36 +0200 |
|---|---|---|
| committer | Christian Poessinger <christian@poessinger.com> | 2020-06-07 14:04:36 +0200 |
| commit | 1c7d7cbd3963428888068af679946e6329567451 (patch) | |
| tree | edd24f2122ed0f44a8c9aa1c4814ae76ae524f7a /interface-definitions | |
| parent | 1fc4aadb5d87643d6e64805b19a5a9e7671737ba (diff) | |
| download | vyos-1x-1c7d7cbd3963428888068af679946e6329567451.tar.gz vyos-1x-1c7d7cbd3963428888068af679946e6329567451.zip | |
wwan: T2529: migrate device from ttyUSB to usbXbY.YpZ.Z
During testing it was discovered that there is a well known problem (we had for
ethernet interfaces) also in the serial port world. They will be enumerated and
mapped to /dev/ttyUSBxxx differently from boot to boot. This is especially
painful on my development APU4 board which also has a Sierra Wireless MC7710
LTE module installed.
The serial port will toggle between ttyUSB2 and ttyUSB5 depending on the
amount of serial port extenders attached (FT4232H).
The shipped udev rule (/usr/lib/udev/rules.d/60-serial.rules) partly solves
this by enumerating the devices into /dev/serial/by-id folder with their name
and serial number - it's a very good idea but I've found that not all of the
FT4232H dongles have a serial number programmed - this leads to the situation
that when you plug in two cables with both having serial number 0 - only one
device symlink will appear - the previous one is always overwritten by the
latter one.
Derive /usr/lib/udev/rules.d/60-serial.rules and create a /dev/serial/by-bus
directory and group devices by attached USB root port.
vyos@vyos:~$ find /dev/serial/by-bus/ -name usb* -exec basename {} \; | sort
usb0b1.3p1.0
usb0b1.3p1.2
usb0b1.3p1.3
usb0b2.4p1.0
usb0b2.4p1.1
usb0b2.4p1.2
usb0b2.4p1.3
So we have USB root 0 with bus 1.3 and port 1.0. The enumeration is constant
accross reboots.
Diffstat (limited to 'interface-definitions')
| -rw-r--r-- | interface-definitions/interfaces-wirelessmodem.xml.in | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/interface-definitions/interfaces-wirelessmodem.xml.in b/interface-definitions/interfaces-wirelessmodem.xml.in index 91eee56ab..d5f2e04d7 100644 --- a/interface-definitions/interfaces-wirelessmodem.xml.in +++ b/interface-definitions/interfaces-wirelessmodem.xml.in @@ -46,12 +46,16 @@ #include <include/interface-vrf.xml.i> <leafNode name="device"> <properties> - <help>System device name (default: ttyUSB0)</help> + <help>Serial device </help> <completionHelp> - <script>ls -1 /dev | grep ttyUSB</script> + <script>ls -1 /dev /dev/serial/by-bus | grep -e ttyS[0-9]* -e usb[0-9]*</script> </completionHelp> <valueHelp> - <format>ttyXXX</format> + <format>ttySXX</format> + <description>System TTY device name</description> + </valueHelp> + <valueHelp> + <format>usbXbY.YpZ.Z</format> <description>System TTY device name</description> </valueHelp> </properties> |