Re: help for loading pwc module (solved)

Re: help for loading pwc module (solved)

[Beffe]

Hi again,

i don't know if anybody reads this list, but i`ll tell you how i solved
my problem anyway. As i told you, usbmodules didn't find the pwc module
for my webcam allthough it is there in modules.usbmap.
Now the problem was that the function load_drivers didn't execute the
usb_map_modules function either cause it had the LISTER variable set.
So i simply had to change line 122 in hotplug.functions from 

   if [ "$LISTER" = "" ]; then

to 
   if [ "$LISTER" = "" -o "$DRIVERS" = "" ]; then

to let it execute usb_map_modules which finds the pwc module.



Another question:
in usb.agent you first call load_drivers with modules.usbmap, then you
call load_drivers with usb.handmap and last you call it with
usb.usermap, regardless if the prior call did already load a module.
Also, if load_modules has found a module, first it tries to load the
kernel module and then it executes the userscript.
In my opinion, if i have a userscript i would like to have it precedence
before the kernel module. That means that first load_drivers has to be
called with the usermap and it has to try to execute the userscript
before loading a kernel driver.
Also if there has been a driver found and loaded, why not just stop but
trying to find one or two more times a driver again? 
In my case, where usbmodules takes some 5 seconds on the webcam before
it cancels, this means about 15 seconds slowdown at boot time.

I would be really happy if one would answer. Maybe everybody is on
holiday?

Bye,
Beffe


Am Die, 2002-09-03 um 22.25 schrieb Beffe:
> Hi all,
> 
> at least i would have expected an RTFM or something. But nothing. OK. I
> did some more debugging and found out, that usbmodules on the webcam
> device takes some seconds and then gives a "cannot get config descriptor
> 0, Connection timed out (110)"
> Does anybody (if there is someone) know what that means and what i can
> do to help usbmodules to find the right driver?
> Also, where can i find this shell script "usb_map_modules"? Maybe that
> would find my driver.
> 
> I would be really greatful for any help.
> 
> Thanks,
> Beffe
> 
> Am Fre, 2002-08-30 um 23.51 schrieb Beffe:
> > 
> > 
> > Hi List,
> > 
> > first thanks for your great work on hotplug, i like it.
> > 
> > Now i have a Philips Webcam, the PCVC680K "Vesta Pro" and i don't know
> > how to tell hotplug to load the pwc module.
> > 
> > when i plug it in, hotplug says: 
> > {syslog}/etc/hotplug/usb.agent: ... no modules for USB product 471/308/6
> > 
> > the entry in /proc/bus/usb/devices looks like this:
> > 
> > T:  Bus\x01 Lev\x02 Prnt\x02 Port\x03 Cnt\x02 Dev#=  6 Spd\x12  MxCh= 0
> > D:  Ver= 1.10 Cls\0(>ifc ) Sub\0 Prot\0 MxPS= 8 #Cfgs=  1
> > P:  Vendor\x0471 ProdID\x0308 Rev= 0.06
> > S:  SerialNumber\x02130211A0105BF5
> > C:* #Ifs= 3 Cfg#= 1 Atr  MxPwrP0mA
> > I:  If#= 0 Alt= 0 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS=   0 Ivl=1ms
> > I:  If#= 0 Alt= 1 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS= 196 Ivl=1ms
> > I:  If#= 0 Alt= 2 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS= 292 Ivl=1ms
> > I:  If#= 0 Alt= 3 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS= 448 Ivl=1ms
> > I:  If#= 0 Alt= 4 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS= 592 Ivl=1ms
> > I:  If#= 0 Alt= 5 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS= 704 Ivl=1ms
> > I:  If#= 0 Alt= 6 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS= 776 Ivl=1ms
> > I:  If#= 0 Alt= 7 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS= 840 Ivl=1ms
> > I:  If#= 0 Alt= 8 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS= 896 Ivl=1ms
> > I:  If#= 0 Alt= 9 #EPs= 2 Cls
(data ) Subÿ Prot\0 Driver=(none)
> > E:  Ad‚(I) Atr\x03(Int.) MxPS=   1 Ivl\x100ms
> > E:  Ad„(I) Atr\x01(Isoc) MxPS= 960 Ivl=1ms
> > I:  If#= 1 Alt= 0 #EPs= 0 Cls\x01(audio) Sub\x01 Prot\0 Driver=(none)
> > I:  If#= 2 Alt= 0 #EPs= 1 Cls\x01(audio) Sub\x02 Prot\0 Driver=(none)
> > E:  Ad…(I) Atr\x05(Isoc) MxPS=   0 Ivl=1ms
> > I:  If#= 2 Alt= 1 #EPs= 1 Cls\x01(audio) Sub\x02 Prot\0 Driver=(none)
> > E:  Ad…(I) Atr\x05(Isoc) MxPS=  90 Ivl=1ms
> > I:  If#= 2 Alt= 2 #EPs= 1 Cls\x01(audio) Sub\x02 Prot\0 Driver=(none)
> > E:  Ad…(I) Atr\x05(Isoc) MxPS=  46 Ivl=1ms
> > I:  If#= 2 Alt= 3 #EPs= 1 Cls\x01(audio) Sub\x02 Prot\0 Driver=(none)
> > E:  Ad…(I) Atr\x05(Isoc) MxPS=  25 Ivl=1ms
> > I:  If#= 2 Alt= 4 #EPs= 1 Cls\x01(audio) Sub\x02 Prot\0 Driver=(none)
> > E:  Ad…(I) Atr\x05(Isoc) MxPS=  16 Ivl=1ms
> > 
> > now i tried several lines in usb.distmap, usb.handmap and usb.usermap,
> > the last try was:
> > pwc                  0x0003 0x0471   0x0308    0x0000       0x0000      
> > 0x00         0x00            0x00            0x00            0x00
> >   0x00         0x00000000
> > 
> > but nothing worked. Always " ... no modules for USB product 471/308/6"
> > 
> > Can anybody tell me the right line??
> > Thanks in advance.
> > 
> > Just for understanding:
> > this line in usb.distmap would try to load the pwc kernel module, while
> > this line in usb.usermap would execute a script called
> > /etc/hotplub/usb/pwc ? is this right? i have this script but it is not
> > executed.
> > 
> > What are these parameters, especially the match_flags?
> > 
> > It would be great if one could help.
> > Bye,
> > Beffe
> > 
> > 
> > 
> > 
> > 
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> 
> 
> 
> 
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Re: help for loading pwc module (solved)

[David Brownell]

Beffe wrote:
> So i simply had to change line 122 in hotplug.functions from 
> 
>    if [ "$LISTER" = "" ]; then
> 
> to 
>    if [ "$LISTER" = "" -o "$DRIVERS" = "" ]; then
> 
> to let it execute usb_map_modules which finds the pwc module.

I just checked in a similar patch to hotplug.functions, so at least
the fix is in CVS now.


> Another question:
> in usb.agent you first call load_drivers with modules.usbmap, then you
> call load_drivers with usb.handmap and last you call it with
> usb.usermap, regardless if the prior call did already load a module.

Right.  Some devices need more than one module, and in fact the
modules are all just _candidates_ to bind to the device.  The
shell script can't assume that loading the first module was enough.


> Also, if load_modules has found a module, first it tries to load the
> kernel module and then it executes the userscript.
> In my opinion, if i have a userscript i would like to have it precedence
> before the kernel module. That means that first load_drivers has to be
> called with the usermap and it has to try to execute the userscript
> before loading a kernel driver.

That couldn't work ... remember that when the driver has already been
loaded (either statically or dynamically linked), the kernel already gave
it a chance to bind to the device.  The only sequencing that can be
established in all cases is kernel first, then userspace.


> Also if there has been a driver found and loaded, why not just stop but
> trying to find one or two more times a driver again? 

See above: when two drivers are candidates, you can't know that the
first one will always bind to the device.


> In my case, where usbmodules takes some 5 seconds on the webcam before
> it cancels, this means about 15 seconds slowdown at boot time.

Just disable "usbmodules" then ... "cd /sbin; mv usbmodules usbmodules-".
Sounds like for you, it's not adding any value.  Though I'm not sure
why it'd be having any problems reading config descriptors.

- Dave




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