#19601: Asus RT-N18U broken FTDI
--------------------------+----------------------------------
Reporter: Grrruk | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone: Chaos Calmer (trunk)
Component: base system | Version: Trunk
Keywords: RT-N18U FTDI |
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I have several FTDI modems that work OK with Linux computers and older
routers like Asus RT-N16 and TP-Link WDR4300, but nothing happens when I
plug any of them into Asus RT-N18U. These modems are based on Telit
(GL868-DUAL). That's how such modem looks while plugged into Ubuntu
computer:
{{{
[ 8766.698948] usb 1-1.4: new full-speed USB device number 11 using ehci-
pci
[ 8766.797934] usb 1-1.4: New USB device found, idVendor=0403,
idProduct=6001
[ 8766.797938] usb 1-1.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 8766.797940] usb 1-1.4: Product: Teleofis RX101-R4
[ 8766.797941] usb 1-1.4: Manufacturer: FTDI
[ 8766.797942] usb 1-1.4: SerialNumber: RXY3PJ3B
[ 8766.800622] ftdi_sio 1-1.4:1.0: FTDI USB Serial Device converter
detected
[ 8766.800651] usb 1-1.4: Detected FT232RL
[ 8766.800653] usb 1-1.4: Number of endpoints 2
[ 8766.800654] usb 1-1.4: Endpoint 1 MaxPacketSize 64
[ 8766.800656] usb 1-1.4: Endpoint 2 MaxPacketSize 64
[ 8766.800657] usb 1-1.4: Setting MaxPacketSize 64
[ 8766.801027] usb 1-1.4: FTDI USB Serial Device converter now attached to
ttyUSB0
}}}
And that's how it looks on serial console in Asus RT-N16:
{{{
[ 55.650000] usb 2-2: new full-speed USB device number 2 using ohci-
platform
[ 55.890000] ftdi_sio 2-2:1.0: FTDI USB Serial Device converter detected
[ 55.900000] usb 2-2: Detected FT232RL
[ 55.900000] usb 2-2: Number of endpoints 2
[ 55.900000] usb 2-2: Endpoint 1 MaxPacketSize 64
[ 55.910000] usb 2-2: Endpoint 2 MaxPacketSize 64
[ 55.910000] usb 2-2: Setting MaxPacketSize 64
[ 55.930000] usb 2-2: FTDI USB Serial Device converter now attached to
ttyUSB0
}}}
But nothing happens when I plug it into Asus RT-N18U. No messages,
nothing. And it's strange that both TX and RX leds on the modem are lit
while plugged into N18U (usually they are dark and blink briefly during
data exchange). Modem finds GSM network as usual and I can call it via
another modem (CSD call), but no exchange happens between modem and
router. Drivers seems to be loaded:
{{{
root@OpenWrt:/# lsmod|grep ftdi
ftdi_sio 28341 0
usbcore 112147 24 ftdi_sio
usbserial 17672 1 ftdi_sio
root@OpenWrt:/# dmesg|grep -i ftdi
[ 17.827806] usbcore: registered new interface driver ftdi_sio
[ 17.833684] usbserial: USB Serial support registered for FTDI USB
Serial Device
}}}
I tried both self-compiled trunk (right now it's r45610) and prebuilt
images during last month, also I tried to include/exclude usb2 and usb3
support, nothing works.
--
Ticket URL: <https://dev.openwrt.org/ticket/19601>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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