My problem is actually on Interface 2 (data interface class). As you can see, I am using the generic usbserial driver for this. There are two problems I face:
1. When running ppp call on it, if ppp failed, it cannot send AT command to it any more (I can see the ttyUSB port still there and I can open it. It just doesn't response to AT any more). But using Nokia's Windows USB driver (on Windows), it is not a problem. When this problem happens, we can only fix it by unplug and plug the USB cables (or rmmod and insmod all USB drivers). This doesn't help with our automation.
2. When using multiple phones for ppp calls, sometimes the USB causes "kernel panic" which leads to PC freezing or reboot.
The ACM interface 1 is of interest to us in the future. But I wonder why the linux ACM driver didn't claim it.
We are using Redhat 8.0 kernel 2.4.18. However, when we moved to 2.6.1, "kernel panic" don't happen as often but problem 1 still there.
Thanks a lot for your help.
Simon
From: Marcel Holtmann <[EMAIL PROTECTED]> To: simon wu <[EMAIL PROTECTED]> CC: [EMAIL PROTECTED] Subject: Re: [Linux-usb-users] Need a contractor to write linux USB driver Date: Wed, 11 Feb 2004 16:54:53 +0100
Hi Simon,
> We are currently using generic usbserial driver. It works but not very well.
> The Nokia phone is apparently not compabible with the existing ACM driver.
> When we plug it in, the ACM doesn't claim it. However, another vendor's
> phone would work with ACM.
I checked up the specification and this is an ACM device
I: If#= 1 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=05 Driver=(none) E: Ad=81(I) Atr=03(Int.) MxPS= 64 Ivl=1ms I: If#= 2 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=serial E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
Interface 1: Cls: Communication Interface Class Sub: Abstract Control Model Prot: Reserved (future use)
Interface 2: Cls: Data Interface Class Sub: Not used Prot: No class specific protocol required
The extra interface 0 seems not be defined in my version of the spec
I: If#= 0 Alt= 0 #EPs= 0 Cls=02(comm.) Sub=08 Prot=01 Driver=(none)
Interface 0: Cls: Communication Interface Class Sub: Reserved (future use)
> Because Nokia is not release the linux driver (or patch) yet, we'd like to
> see if anyone is willing to write a driver for this device. If possible, I
> will go to my senior management for finacial support the development of the
> driver. One thing I don't know is if we need the Nokia USB spec (we don't
> have it).
So you only need a serial interface to the phone? The OBEX interfaces are of no interest for you?
What kernel do you have tested?
Regards
Marcel
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