ftdi-usb-sio-devel

[Ftdi-usb-sio-devel] Strange behavior of ftdi module when communicating with device.

[Toan P. <tph...@gm...>]

Hi everyone,

I am not sure if this is the right place to post this message but I've been
experiencing an odd bug in the ftdi_sio kernel module.
After an usb device (using a FTDI 232RQ chip) is connected, it will then
periodically get disconnected and rediscovered after after
sometime when my application communicating with it.  Also, I found one can
easily replicate this problem by doing the following.

a.  Using Linux kernel 2.6.21.7, plug in a usb device having a FTDI 232RQ
chipset
b.  stty -F /dev/ttyUSB0 19200 # Set the proper speed to the device
c.  cat /etc/* > /dev/ttyUSB0
d.  dmesg # you'll see the module error messages and that it got closed and
re-open (rediscovered)

Again, this problem only occurred on my T2 SDE Linux using Kernel 2.6.21-7.
I tested this on my Ubuntu 7.1 box and it ran fine.

I am not sure if this is a kernel or kernel module bug fix that I am not
aware about.  Would someone comment on this strange behavior of the FTDI
USB-serial kernel module ?  thank you.

Toan

[Ftdi-usb-sio-devel] VID and PID

[Tim H. <tim...@ya...>]

My company has begun to make a device incorporating the FTDI 232R for communications.  We have a VID from USB.org and I have modified the Windows drivers to properly identify our product.  

Now I would like to get the product working with Ubuntu 8.04, and eventually also Red Hat and other distributions. 

How can I do this?  

Will the driver recognize VID and PID as parameters?  Or, must the VID and PID be included in the source code?

Thanks,

Tim Henderson
Alti-2 Inc.



      

Re: [Ftdi-usb-sio-devel] VID and PID

[Steve D. <onr...@ya...>]

Did you already get a response on this?

If the device enumerates a new VID or PID then it must
be added in a few places.  check ftdi_sio.c
id_table_combined[], ftdi_chip_name[]
get_ftdi_divisor(),
ftdi_determine_type() for starters.

depending on which kernel version you are supporting
you will need to modify the appropriate driver source
since ftdi_sio.c has changed in linux releases.  

let me know if you have more questions and I'll see
what I can do.

/steverino2

--- Tim Henderson <tim...@ya...> wrote:

> My company has begun to make a device incorporating
> the FTDI 232R for communications.  We have a VID
> from USB.org and I have modified the Windows drivers
> to properly identify our product.  
> 
> Now I would like to get the product working with
> Ubuntu 8.04, and eventually also Red Hat and other
> distributions. 
> 
> How can I do this?  
> 
> Will the driver recognize VID and PID as parameters?
>  Or, must the VID and PID be included in the source
> code?
> 
> Thanks,
> 
> Tim Henderson
> Alti-2 Inc.
> 
> 
> 
>       
> 
>
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