broken(?) Lucent Venus chipset and Linux 2.4

broken(?) Lucent Venus chipset and Linux 2.4

[W. Michael Petullo]

I have a Lucent Microelectronics Venus based modem, the Actiontec
Internal Call Waiting modem.  I have been trying to get it working well
with Linux 2.4 for some time now.  Theodore Ts'o, the maintainer of
the Linux serial driver, and I have talked quite a bit on the subject.
We both suspect that the Venus chipset is broken.

I have some code available at http://www.flyn.org related to this issue.
First, I have an ugly patch that adds support for the Actiontec Internal
Call Waiting modem to Theodore's serial driver version 5.05.  Second,
I have a simple kernel module that seems to demonstrate that the Venus
chipset has something wrong with it.  The module code should be self
explanatory.  To summarize, writing a value, call it foo, to, for example,
the modem's interrupt enable register and then immediately reading the
register's value does not always return foo.

If you have or have access to a Linux box with a Venus-based modem,
answering any of these questions would be very helpful:

o Does your modem work flawlessly with Linux 2.4?

o Could you run my test kernel module?  If so, what are the results on
your computer?

I have been lobbying both Lucent and Actiontec to help me with this issue.
Up to this point neither has provided substantial help.  However, there
is promise and I am not ready to give up yet.

Thanks!

-- 
W. Michael Petullo

:wq

Re: broken(?) Lucent Venus chipset and Linux 2.4

[Martin Diehl]

On Fri, 9 Mar 2001, W. Michael Petullo wrote:

> If you have or have access to a Linux box with a Venus-based modem,
> answering any of these questions would be very helpful:
> 

Well, I'm not absolutely sure if we are talking about the same thing: what 
I have is a re-labeled PC-Card modem which identifies according to

cardctl ident:
  product info: "LUCENT-VENUS", "PCMCIA 56K DataFax"
  manfid: 0x0200, 0x0001
  function: 2 (serial)

ATI:
Venus K56FLEX V.90 kfav163 PCMCIA p52198

> o Does your modem work flawlessly with Linux 2.4?

Yes, for me it does - with the standard serial.c driver (and
PCMCIA's serial_cs of course) under Linux 2.0/2.2/2.4.

HTH.
Martin