* Re: dabusb/usb modems conflict issue
2003-05-03 23:38 dabusb/usb modems conflict issue wwp
@ 2003-05-05 18:53 ` David Brownell
2003-05-05 22:29 ` wwp
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: David Brownell @ 2003-05-05 18:53 UTC (permalink / raw)
To: linux-hotplug
Hi,
> Well.. our driver support a lot of GlobeSpan chipset-based USB ADSL modems,
> and in most cases, hotplug loads dabusb module at startup to add support for
> the (modem) devices.
The URLs you mentioned don't seem available to me just now,
so I can't see any more information than is found in your
email message ...
EVERY version of "dabusb" I've ever seen has a bug in
its MODULE_DEVICE_TABLE entries: they claim the default
EZ-USB product/vendor IDs. Those IDs are not supposed
to be used by _any_ product except Cypress devkits.
(Which means any developers working with Cypress EZ-USB
and Linux trip over the bug...)
In fact, the current drivers (2.4, 2.5) seem to have
only two IDs, both with Cypress vendor IDs. One of
them is a bug, and needs to be removed. I don't know
about the other one; it could be legit.
Assuming this isn't a hotplug bug, there are exactly
three possibilities:
- This GlobeSpan driver is also trying to bind to
default EZ-USB devices. **BOTH** drivers have bugs,
since no production devices may use those IDs.
- Or the globespan driver is also trying to bind
to the other (pid 9999) device entry. Assuming
that ID was allocated legally only one of the
drivers can possibly be correct.
- Both drivers are using VID/PID entries they aren't
allowed to use, for the second entry (the one that's
not the EZ-USB default). For example, that ID may
not have been allocated to either one by Cypress.
Do you know which is the situation?
> We used to disable dabusb module load by removing the module file or
> re-configuring the kernel to skip dabusb support, and with latest versions of
> hotplug (depending on the GNU/Linux distro), we recommend our users to add
> dabusb to the blacklist file.
>
>
> You will find related info about how we manage this issue there:
>
> the project page..
> http://eciadsl.flashtux.org/index.php?lang=en
>
> the supported modems list (including vid/pid)..
> http://eciadsl.flashtux.org/modems.php?lang=en
>
> our Q/A in the FAQ related to this dabusb issue..
> http://eciadsl.flashtux.org/faq.php?lang=en#2.1
>
>
> My questions:
> 1/
> Do we use the right method to avoid dabusb loading for non-audio-dabusb
> devices (modems).
>
> 2/
> Is this really a conflict? What's your thought about this?
>
> 3/
> Do you have any piece of advice related to this (generally)?
The blacklist exists basically to cope with driver bugs,
you should find out what the situation is. Does your modem
driver include product/vendor IDs for pre-production units?
If so, just remove them.
- Dave
>
> Thanx in advance,
> regards
>
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: dabusb/usb modems conflict issue
2003-05-03 23:38 dabusb/usb modems conflict issue wwp
2003-05-05 18:53 ` David Brownell
@ 2003-05-05 22:29 ` wwp
2003-05-06 13:31 ` Thomas Sailer
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: wwp @ 2003-05-05 22:29 UTC (permalink / raw)
To: linux-hotplug
Hi David Brownell,
On Mon, 05 May 2003 11:53:01 -0700 David Brownell <david-b@pacbell.net> wrote:
[snip]
> The URLs you mentioned don't seem available to me just now,
> so I can't see any more information than is found in your
> email message ...
Ah? The site maybe be long to reach, but should be online anyway.
[snip]
> Assuming this isn't a hotplug bug, there are exactly
> three possibilities:
>
> - This GlobeSpan driver is also trying to bind to
> default EZ-USB devices. **BOTH** drivers have bugs,
> since no production devices may use those IDs.
>
> - Or the globespan driver is also trying to bind
> to the other (pid 9999) device entry. Assuming
> that ID was allocated legally only one of the
> drivers can possibly be correct.
>
> - Both drivers are using VID/PID entries they aren't
> allowed to use, for the second entry (the one that's
> not the EZ-USB default). For example, that ID may
> not have been allocated to either one by Cypress.
>
> Do you know which is the situation?
Arg. I feel I don't know what to answer, maybe I don't really understand this.
All what I can say is that our driver (not officially supported by any brand)
inits the modems (with vid1/pid1, and so get vid2/pid2) then loads the
firmware sniffed under windows. Then it's able to use a .bin sniffed under
windows too in order to get the ADSL synch, that's it.
But for this we need to disable dabusb of course..
Regards,
--
wwp
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: dabusb/usb modems conflict issue
2003-05-03 23:38 dabusb/usb modems conflict issue wwp
2003-05-05 18:53 ` David Brownell
2003-05-05 22:29 ` wwp
@ 2003-05-06 13:31 ` Thomas Sailer
2003-05-06 14:58 ` David Brownell
2003-10-02 8:07 ` wwp
4 siblings, 0 replies; 6+ messages in thread
From: Thomas Sailer @ 2003-05-06 13:31 UTC (permalink / raw)
To: linux-hotplug
On Mon, 2003-05-05 at 20:53, David Brownell wrote:
> In fact, the current drivers (2.4, 2.5) seem to have
> only two IDs, both with Cypress vendor IDs. One of
> them is a bug, and needs to be removed. I don't know
> about the other one; it could be legit.
The current driver is available from
http://www1.baycom.de/download/dabusb/dabusb-linux-i386-2.24a.tar.gz,
the one in the kernel doesn't even work (it crashes on plugin of the
device).
The current driver contains the Terratec production VID/PIDs, but also
still has the Anchor VID/PIDs that were used in engineering models.
These PID's should probably be disabled by default.
Tom
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: dabusb/usb modems conflict issue
2003-05-03 23:38 dabusb/usb modems conflict issue wwp
` (2 preceding siblings ...)
2003-05-06 13:31 ` Thomas Sailer
@ 2003-05-06 14:58 ` David Brownell
2003-10-02 8:07 ` wwp
4 siblings, 0 replies; 6+ messages in thread
From: David Brownell @ 2003-05-06 14:58 UTC (permalink / raw)
To: linux-hotplug
Hi Tom,
>>In fact, the current drivers (2.4, 2.5) seem to have
>>only two IDs, both with Cypress vendor IDs. One of
>>them is a bug, and needs to be removed. I don't know
>>about the other one; it could be legit.
>
>
> The current driver is available from
> http://www1.baycom.de/download/dabusb/dabusb-linux-i386-2.24a.tar.gz,
> the one in the kernel doesn't even work (it crashes on plugin of the
> device).
>
> The current driver contains the Terratec production VID/PIDs, but also
> still has the Anchor VID/PIDs that were used in engineering models.
> These PID's should probably be disabled by default.
So someone would make a number of folk happy by contributing
patches to update both 2.4 and 2.5 kernels ... :)
- Dave
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: dabusb/usb modems conflict issue
2003-05-03 23:38 dabusb/usb modems conflict issue wwp
` (3 preceding siblings ...)
2003-05-06 14:58 ` David Brownell
@ 2003-10-02 8:07 ` wwp
4 siblings, 0 replies; 6+ messages in thread
From: wwp @ 2003-10-02 8:07 UTC (permalink / raw)
To: linux-hotplug
Hi Thomas Sailer,
On 06 May 2003 15:31:02 +0200 Thomas Sailer <sailer@scs.ch> wrote:
> On Mon, 2003-05-05 at 20:53, David Brownell wrote:
>
> > In fact, the current drivers (2.4, 2.5) seem to have
> > only two IDs, both with Cypress vendor IDs. One of
> > them is a bug, and needs to be removed. I don't know
> > about the other one; it could be legit.
>
> The current driver is available from
> http://www1.baycom.de/download/dabusb/dabusb-linux-i386-2.24a.tar.gz,
> the one in the kernel doesn't even work (it crashes on plugin of the
> device).
>
> The current driver contains the Terratec production VID/PIDs, but also
> still has the Anchor VID/PIDs that were used in engineering models.
> These PID's should probably be disabled by default.
Do you know if fixed dabusb (regarding to the previous topic) has been merged
to recent 2.4 or 2.6-pre?
Regards,
--
wwp
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^ permalink raw reply [flat|nested] 6+ messages in thread