pl2303 driver needed

kscott121 · 05-16-2008, 09:50 PM

I have a BenQ M32 wireless modem with USB-to-serial converter (supposedly from Prolific). When I plug it in I can load the pl2303 driver but it won't create /dev/ttyUSB0 as it should. I researched and the vendor

roduct combination offered by lsusb (see below) doesn't show up in the pl2303.h list (so I presume that means it's not supported by this driver as is):
Bus 005 Device 003: ID 067b:0609 Prolific Technology, Inc.
Bus 004 Device 001: ID 0000:0000
It is a Debian Etch standard 2.6.18-5 kernel system.

2 questions:
1) How can I build a kernel module that has the proper vend

rod #s (067b:0609) to see if that will allow it to work (or is there a better solution)?
and
2) Why wouldn't it work if I simply hex-editted the pl2303.ko binary and changed one of the named aliases from a vend

rod pair that I don't care about to mine?

Thanks in advance
KScott

Simon Bridge · 05-18-2008, 07:45 AM

2. If your device is not supported by the driver, then changing vendor IDs in the module will do nothing (at best).

1.
BenQ M32 is a GPM/GPRS wireless unit put out in 03.

What makes you think this is supposed to work with the pl232 driver?

Quote:

with USB-to-serial converter

You mean the BenQ has a serial interface and you are using it through usb?

kscott121 · 06-20-2008, 06:56 PM

Sorry for the delay. The device has an internal Prolific USB -to-serial-converter and the Prolific website has
a RH 9 (kernel 2.4.x) driver which works fine (after I recompiled it with the proper vendor#/product# combination) in an actual redhat9 test system. The vendor provided driver has the same name (pl2303) as the prolific pl2303 usb-to-serial driver found in recent 2.6 kernels but they two seem quite different (and the stock driver certainly lacks the needed vend/prod #s). I can't tell if the other differences are only from the fact that one is an RH9 driver for a 2.4.x kernel and other is for a 2.6.x kernel or if they are truly "different" in substantive ways.
I therefore am trying to figure out how to change the vend/prod numbers in the stock 2.6.x pl2303 driver but I can't figure out the kbuild stuff. etc.