Regarding Serial consloe

Regarding Serial consloe

[Prabhu Chawandi]

Hi,

   how the serial console is routed...
I wanted to know how can I change it to the USB serial console ..


_Prabhu

Re: Regarding Serial consloe

[Prabhu Chawandi]

To elaborate more...

  I am using currnetly take the log messages on 8250 serial comsole...

I am usinf minicom for that ...

I got PL2303 device with me,  I am trying to route all  the debug
messages to this USB - serial device .. I have tried modifying
configurations ..
i am not able to attain it,,

can anybody help me on this ...


Thanks in advance
Prabhu


On 10/8/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> Hi,
>
>   how the serial console is routed...
> I wanted to know how can I change it to the USB serial console ..
>
>
> _Prabhu
>

Re: Regarding Serial consloe

[Aristeu Rozanski]

>   I am using currnetly take the log messages on 8250 serial comsole...
> 
> I am usinf minicom for that ...
> 
> I got PL2303 device with me,  I am trying to route all  the debug
> messages to this USB - serial device .. I have tried modifying
> configurations ..
> i am not able to attain it,,
> 
> can anybody help me on this ...
do you have the PL2303 and USB host controller you're using compiled
built-in? also, you have to add console=ttyUSB0,<config options> as
kernel parameter.

-- 
Aristeu

Re: Regarding Serial consloe

[Prabhu Chawandi]

Yeah...   I did all the configurations.

Still not getting the logs :(

I feel I am missing the part where USB- serial  will be registered to
the tty layer.

or Do I need to insert the code where we will be opening the device
and performimg the write/read  operations.

please comment on this ...


Thanks in advance
Prabhu

On 10/8/08, Aristeu Rozanski <aris@ruivo.org> wrote:
> >   I am using currnetly take the log messages on 8250 serial comsole...
> >
> > I am usinf minicom for that ...
> >
> > I got PL2303 device with me,  I am trying to route all  the debug
> > messages to this USB - serial device .. I have tried modifying
> > configurations ..
> > i am not able to attain it,,
> >
> > can anybody help me on this ...
> do you have the PL2303 and USB host controller you're using compiled
> built-in? also, you have to add console=ttyUSB0,<config options> as
> kernel parameter.
>
> --
> Aristeu
>
>

Re: Regarding Serial consloe

[Prabhu Chawandi]

Hi,

Please update me on this....

it will be a greate help ....


Thanks in advance
Prabhu

On 10/10/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> Yeah...   I did all the configurations.
>
> Still not getting the logs :(
>
> I feel I am missing the part where USB- serial  will be registered to
> the tty layer.
>
> or Do I need to insert the code where we will be opening the device
> and performimg the write/read  operations.
>
> please comment on this ...
>
>
> Thanks in advance
> Prabhu
>
> On 10/8/08, Aristeu Rozanski <aris@ruivo.org> wrote:
> > >   I am using currnetly take the log messages on 8250 serial comsole...
> > >
> > > I am usinf minicom for that ...
> > >
> > > I got PL2303 device with me,  I am trying to route all  the debug
> > > messages to this USB - serial device .. I have tried modifying
> > > configurations ..
> > > i am not able to attain it,,
> > >
> > > can anybody help me on this ...
> > do you have the PL2303 and USB host controller you're using compiled
> > built-in? also, you have to add console=ttyUSB0,<config options> as
> > kernel parameter.
> >
> > --
> > Aristeu
> >
> >
>

Re: Regarding Serial consloe

[Greg KH]

A: No.
Q: Should I include quotations after my reply?

On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> On 10/10/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > Yeah...   I did all the configurations.
> >
> > Still not getting the logs :(
> >
> > I feel I am missing the part where USB- serial  will be registered to
> > the tty layer.
> >
> > or Do I need to insert the code where we will be opening the device
> > and performimg the write/read  operations.

No code needs to be added.

Please let us know what errors you are seeing, what does your kernel log
messages show, and so on.  It should work properly if you tell the boot
command line to use the usb-serial port for console messages.

thanks,

greg k-h
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Re: Regarding Serial consloe

[Prabhu Chawandi]

Hi,

   I am not getting any errors ....

I have set the command line parameter. I am booting through  CFE ,
This time I am using Serial console while booting I am changing to USB
serial...

Once the USB -serial driver is loaded I am expecting the rest of the
logs on the console but I am getting AT command and no more
messages...

Later I changed inittab file for the login prompt...

I have the other serial connection through which I can control the
application. When I close that application, through the normal serial,
I am getting login prompt on both USB-serial and normal Serial.

If I run the application again I am getting logs now on both serials...

I am consfused why I am not getting the boot log messages...

I am sure that I have set commandline parameter properly....

Aristeu Rozanski has said above that ,,, it is not possoble to log
boot messages on the USB-serial ... what might be the techincal reason
?

Thanks
Prabhu








On 10/10/08, Greg KH <greg@kroah.com> wrote:
>
> A: No.
> Q: Should I include quotations after my reply?
>
> On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> > On 10/10/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > Yeah...   I did all the configurations.
> > >
> > > Still not getting the logs :(
> > >
> > > I feel I am missing the part where USB- serial  will be registered to
> > > the tty layer.
> > >
> > > or Do I need to insert the code where we will be opening the device
> > > and performimg the write/read  operations.
>
> No code needs to be added.
>
> Please let us know what errors you are seeing, what does your kernel log
> messages show, and so on.  It should work properly if you tell the boot
> command line to use the usb-serial port for console messages.
>
> thanks,
>
> greg k-h
>

Re: Regarding Serial consloe

[Aristeu Rozanski]

>    I am not getting any errors ....
> 
> I have set the command line parameter. I am booting through  CFE ,
> This time I am using Serial console while booting I am changing to USB
> serial...
please paste here all the kernel parameters you're using and attach your
config file.

-- 
Aristeu

Re: Regarding Serial consloe

[Prabhu Chawandi]

Some more updates :

   I am using kernel 2.6.12.4.

It was Tomasz Chmielewski who said that  boot messages cant be logged
on USB-serial. soory for the mistake Aristeu Rozanski .

On 10/13/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> Hi,
>
>   I am not getting any errors ....
>
> I have set the command line parameter. I am booting through  CFE ,
> This time I am using Serial console while booting I am changing to USB
> serial...
>
> Once the USB -serial driver is loaded I am expecting the rest of the
> logs on the console but I am getting AT command and no more
> messages...
>
> Later I changed inittab file for the login prompt...
>
> I have the other serial connection through which I can control the
> application. When I close that application, through the normal serial,
> I am getting login prompt on both USB-serial and normal Serial.
>
> If I run the application again I am getting logs now on both serials...
>
> I am consfused why I am not getting the boot log messages...
>
> I am sure that I have set commandline parameter properly....
>
> Aristeu Rozanski has said above that ,,, it is not possoble to log
> boot messages on the USB-serial ... what might be the techincal reason
> ?
>
> Thanks
> Prabhu
>
>
>
>
>
>
>
>
> On 10/10/08, Greg KH <greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> wrote:
> >
> > A: No.
> > Q: Should I include quotations after my reply?
> >
> > On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> > > On 10/10/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > Yeah...   I did all the configurations.
> > > >
> > > > Still not getting the logs :(
> > > >
> > > > I feel I am missing the part where USB- serial  will be registered to
> > > > the tty layer.
> > > >
> > > > or Do I need to insert the code where we will be opening the device
> > > > and performimg the write/read  operations.
> >
> > No code needs to be added.
> >
> > Please let us know what errors you are seeing, what does your kernel log
> > messages show, and so on.  It should work properly if you tell the boot
> > command line to use the usb-serial port for console messages.
> >
> > thanks,
> >
> > greg k-h
> >
>
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Re: Regarding Serial consloe

[Prabhu Chawandi]

CONFIG_CMDLINE="rw console=ttyUSB0, 115200 mem =128M"

and in inittab

ttyUSB0::respawn:/bin/getty  -L ttyUSB0 115200 vt102


--Prabhu

On 10/13/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> Some more updates :
>
>   I am using kernel 2.6.12.4.
>
> It was Tomasz Chmielewski who said that  boot messages cant be logged
> on USB-serial. soory for the mistake Aristeu Rozanski .
>
> On 10/13/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > Hi,
> >
> >   I am not getting any errors ....
> >
> > I have set the command line parameter. I am booting through  CFE ,
> > This time I am using Serial console while booting I am changing to USB
> > serial...
> >
> > Once the USB -serial driver is loaded I am expecting the rest of the
> > logs on the console but I am getting AT command and no more
> > messages...
> >
> > Later I changed inittab file for the login prompt...
> >
> > I have the other serial connection through which I can control the
> > application. When I close that application, through the normal serial,
> > I am getting login prompt on both USB-serial and normal Serial.
> >
> > If I run the application again I am getting logs now on both serials...
> >
> > I am consfused why I am not getting the boot log messages...
> >
> > I am sure that I have set commandline parameter properly....
> >
> > Aristeu Rozanski has said above that ,,, it is not possoble to log
> > boot messages on the USB-serial ... what might be the techincal reason
> > ?
> >
> > Thanks
> > Prabhu
> >
> >
> >
> >
> >
> >
> >
> >
> > On 10/10/08, Greg KH <greg@kroah.com> wrote:
> > >
> > > A: No.
> > > Q: Should I include quotations after my reply?
> > >
> > > On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> > > > On 10/10/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > > > Yeah...   I did all the configurations.
> > > > >
> > > > > Still not getting the logs :(
> > > > >
> > > > > I feel I am missing the part where USB- serial  will be registered to
> > > > > the tty layer.
> > > > >
> > > > > or Do I need to insert the code where we will be opening the device
> > > > > and performimg the write/read  operations.
> > >
> > > No code needs to be added.
> > >
> > > Please let us know what errors you are seeing, what does your kernel log
> > > messages show, and so on.  It should work properly if you tell the boot
> > > command line to use the usb-serial port for console messages.
> > >
> > > thanks,
> > >
> > > greg k-h
> > >
> >
>

RE: Regarding Serial consloe

[Gupta, Ajay Kumar]

> CONFIG_CMDLINE="rw console=ttyUSB0, 115200 mem =128M"
> 
> and in inittab
> 
> ttyUSB0::respawn:/bin/getty  -L ttyUSB0 115200 vt102

Apart from this add "mknod /dev/ttyUSB0 c 188 0" in "filesystem/etc/init.d/rcS"

This is required if this node is not created during bootup and usb serial
device detection.

Regards,
Ajay
> 
> 
> --Prabhu
> 
> On 10/13/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > Some more updates :
> >
> >   I am using kernel 2.6.12.4.
> >
> > It was Tomasz Chmielewski who said that  boot messages cant be logged
> > on USB-serial. soory for the mistake Aristeu Rozanski .
> >
> > On 10/13/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > Hi,
> > >
> > >   I am not getting any errors ....
> > >
> > > I have set the command line parameter. I am booting through  CFE ,
> > > This time I am using Serial console while booting I am changing to USB
> > > serial...
> > >
> > > Once the USB -serial driver is loaded I am expecting the rest of the
> > > logs on the console but I am getting AT command and no more
> > > messages...
> > >
> > > Later I changed inittab file for the login prompt...
> > >
> > > I have the other serial connection through which I can control the
> > > application. When I close that application, through the normal serial,
> > > I am getting login prompt on both USB-serial and normal Serial.
> > >
> > > If I run the application again I am getting logs now on both serials...
> > >
> > > I am consfused why I am not getting the boot log messages...
> > >
> > > I am sure that I have set commandline parameter properly....
> > >
> > > Aristeu Rozanski has said above that ,,, it is not possoble to log
> > > boot messages on the USB-serial ... what might be the techincal reason
> > > ?
> > >
> > > Thanks
> > > Prabhu
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > On 10/10/08, Greg KH <greg@kroah.com> wrote:
> > > >
> > > > A: No.
> > > > Q: Should I include quotations after my reply?
> > > >
> > > > On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> > > > > On 10/10/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > > > > Yeah...   I did all the configurations.
> > > > > >
> > > > > > Still not getting the logs :(
> > > > > >
> > > > > > I feel I am missing the part where USB- serial  will be registered to
> > > > > > the tty layer.
> > > > > >
> > > > > > or Do I need to insert the code where we will be opening the device
> > > > > > and performimg the write/read  operations.
> > > >
> > > > No code needs to be added.
> > > >
> > > > Please let us know what errors you are seeing, what does your kernel log
> > > > messages show, and so on.  It should work properly if you tell the boot
> > > > command line to use the usb-serial port for console messages.
> > > >
> > > > thanks,
> > > >
> > > > greg k-h
> > > >
> > >
> >
> --
> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Regarding Serial consloe

[Prabhu Chawandi]

Ajay,

  Is USB fs not an auto fs ... ?
I mean as we put the device we get the /dev/<device_id> created auto...

I can see the /dev/ttyUSB0 entry.

Thanks
Prabhu

On 10/13/08, Gupta, Ajay Kumar <ajay.gupta-l0cyMroinI0@public.gmane.org> wrote:
>
> > CONFIG_CMDLINE="rw console=ttyUSB0, 115200 mem =128M"
> >
> > and in inittab
> >
> > ttyUSB0::respawn:/bin/getty  -L ttyUSB0 115200 vt102
>
> Apart from this add "mknod /dev/ttyUSB0 c 188 0" in "filesystem/etc/init.d/rcS"
>
> This is required if this node is not created during bootup and usb serial
> device detection.
>
> Regards,
> Ajay
> >
> >
> > --Prabhu
> >
> > On 10/13/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > Some more updates :
> > >
> > >   I am using kernel 2.6.12.4.
> > >
> > > It was Tomasz Chmielewski who said that  boot messages cant be logged
> > > on USB-serial. soory for the mistake Aristeu Rozanski .
> > >
> > > On 10/13/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > Hi,
> > > >
> > > >   I am not getting any errors ....
> > > >
> > > > I have set the command line parameter. I am booting through  CFE ,
> > > > This time I am using Serial console while booting I am changing to USB
> > > > serial...
> > > >
> > > > Once the USB -serial driver is loaded I am expecting the rest of the
> > > > logs on the console but I am getting AT command and no more
> > > > messages...
> > > >
> > > > Later I changed inittab file for the login prompt...
> > > >
> > > > I have the other serial connection through which I can control the
> > > > application. When I close that application, through the normal serial,
> > > > I am getting login prompt on both USB-serial and normal Serial.
> > > >
> > > > If I run the application again I am getting logs now on both serials...
> > > >
> > > > I am consfused why I am not getting the boot log messages...
> > > >
> > > > I am sure that I have set commandline parameter properly....
> > > >
> > > > Aristeu Rozanski has said above that ,,, it is not possoble to log
> > > > boot messages on the USB-serial ... what might be the techincal reason
> > > > ?
> > > >
> > > > Thanks
> > > > Prabhu
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > On 10/10/08, Greg KH <greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> wrote:
> > > > >
> > > > > A: No.
> > > > > Q: Should I include quotations after my reply?
> > > > >
> > > > > On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> > > > > > On 10/10/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > > > > Yeah...   I did all the configurations.
> > > > > > >
> > > > > > > Still not getting the logs :(
> > > > > > >
> > > > > > > I feel I am missing the part where USB- serial  will be registered to
> > > > > > > the tty layer.
> > > > > > >
> > > > > > > or Do I need to insert the code where we will be opening the device
> > > > > > > and performimg the write/read  operations.
> > > > >
> > > > > No code needs to be added.
> > > > >
> > > > > Please let us know what errors you are seeing, what does your kernel log
> > > > > messages show, and so on.  It should work properly if you tell the boot
> > > > > command line to use the usb-serial port for console messages.
> > > > >
> > > > > thanks,
> > > > >
> > > > > greg k-h
> > > > >
> > > >
> > >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>
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RE: Regarding Serial consloe

[Gupta, Ajay Kumar]

>   Is USB fs not an auto fs ... ?
> I mean as we put the device we get the /dev/<device_id> created auto...
> 
> I can see the /dev/ttyUSB0 entry.


If it is auto created then that entry is not required. Another thing that can 
be tried is using default baudrate of 9600 as below.

CONFIG_CMDLINE="rw console=ttyUSB0, 9600 mem =128M"
and in inittab
ttyUSB0::respawn:/bin/getty  -L ttyUSB0 9600 vt102

Regards,
Ajay

> 
> Thanks
> Prabhu
> 
> On 10/13/08, Gupta, Ajay Kumar <ajay.gupta@ti.com> wrote:
> >
> > > CONFIG_CMDLINE="rw console=ttyUSB0, 115200 mem =128M"
> > >
> > > and in inittab
> > >
> > > ttyUSB0::respawn:/bin/getty  -L ttyUSB0 115200 vt102
> >
> > Apart from this add "mknod /dev/ttyUSB0 c 188 0" in "filesystem/etc/init.d/rcS"
> >
> > This is required if this node is not created during bootup and usb serial
> > device detection.
> >
> > Regards,
> > Ajay
> > >
> > >
> > > --Prabhu
> > >
> > > On 10/13/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > > Some more updates :
> > > >
> > > >   I am using kernel 2.6.12.4.
> > > >
> > > > It was Tomasz Chmielewski who said that  boot messages cant be logged
> > > > on USB-serial. soory for the mistake Aristeu Rozanski .
> > > >
> > > > On 10/13/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > > > Hi,
> > > > >
> > > > >   I am not getting any errors ....
> > > > >
> > > > > I have set the command line parameter. I am booting through  CFE ,
> > > > > This time I am using Serial console while booting I am changing to USB
> > > > > serial...
> > > > >
> > > > > Once the USB -serial driver is loaded I am expecting the rest of the
> > > > > logs on the console but I am getting AT command and no more
> > > > > messages...
> > > > >
> > > > > Later I changed inittab file for the login prompt...
> > > > >
> > > > > I have the other serial connection through which I can control the
> > > > > application. When I close that application, through the normal serial,
> > > > > I am getting login prompt on both USB-serial and normal Serial.
> > > > >
> > > > > If I run the application again I am getting logs now on both serials...
> > > > >
> > > > > I am consfused why I am not getting the boot log messages...
> > > > >
> > > > > I am sure that I have set commandline parameter properly....
> > > > >
> > > > > Aristeu Rozanski has said above that ,,, it is not possoble to log
> > > > > boot messages on the USB-serial ... what might be the techincal reason
> > > > > ?
> > > > >
> > > > > Thanks
> > > > > Prabhu
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > On 10/10/08, Greg KH <greg@kroah.com> wrote:
> > > > > >
> > > > > > A: No.
> > > > > > Q: Should I include quotations after my reply?
> > > > > >
> > > > > > On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> > > > > > > On 10/10/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > > > > > > Yeah...   I did all the configurations.
> > > > > > > >
> > > > > > > > Still not getting the logs :(
> > > > > > > >
> > > > > > > > I feel I am missing the part where USB- serial  will be registered to
> > > > > > > > the tty layer.
> > > > > > > >
> > > > > > > > or Do I need to insert the code where we will be opening the device
> > > > > > > > and performimg the write/read  operations.
> > > > > >
> > > > > > No code needs to be added.
> > > > > >
> > > > > > Please let us know what errors you are seeing, what does your kernel log
> > > > > > messages show, and so on.  It should work properly if you tell the boot
> > > > > > command line to use the usb-serial port for console messages.
> > > > > >
> > > > > > thanks,
> > > > > >
> > > > > > greg k-h
> > > > > >
> > > > >
> > > >
> > > --
> > > To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> > > the body of a message to majordomo@vger.kernel.org
> > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >
> >

Re: Regarding Serial consloe

[Prabhu Chawandi]

Ajay,
  Here is the link, where same issue is raised ...

And for that Greg has told ..  no kernel messages can be loggen on USB-serial.

Is that hold good today ? or can we produce logs on uSB serial console..


link:
http://marc.info/?l=linux-usb-devel&m=119384398314558&q=raw

Thanks
Prabhu

On 10/13/08, Gupta, Ajay Kumar <ajay.gupta@ti.com> wrote:
> >   Is USB fs not an auto fs ... ?
> > I mean as we put the device we get the /dev/<device_id> created auto...
> >
> > I can see the /dev/ttyUSB0 entry.
>
>
> If it is auto created then that entry is not required. Another thing that can
> be tried is using default baudrate of 9600 as below.
>
> CONFIG_CMDLINE="rw console=ttyUSB0, 9600 mem =128M"
> and in inittab
> ttyUSB0::respawn:/bin/getty  -L ttyUSB0 9600 vt102
>
> Regards,
> Ajay
>
> >
> > Thanks
> > Prabhu
> >
> > On 10/13/08, Gupta, Ajay Kumar <ajay.gupta@ti.com> wrote:
> > >
> > > > CONFIG_CMDLINE="rw console=ttyUSB0, 115200 mem =128M"
> > > >
> > > > and in inittab
> > > >
> > > > ttyUSB0::respawn:/bin/getty  -L ttyUSB0 115200 vt102
> > >
> > > Apart from this add "mknod /dev/ttyUSB0 c 188 0" in "filesystem/etc/init.d/rcS"
> > >
> > > This is required if this node is not created during bootup and usb serial
> > > device detection.
> > >
> > > Regards,
> > > Ajay
> > > >
> > > >
> > > > --Prabhu
> > > >
> > > > On 10/13/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > > > Some more updates :
> > > > >
> > > > >   I am using kernel 2.6.12.4.
> > > > >
> > > > > It was Tomasz Chmielewski who said that  boot messages cant be logged
> > > > > on USB-serial. soory for the mistake Aristeu Rozanski .
> > > > >
> > > > > On 10/13/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > > > > Hi,
> > > > > >
> > > > > >   I am not getting any errors ....
> > > > > >
> > > > > > I have set the command line parameter. I am booting through  CFE ,
> > > > > > This time I am using Serial console while booting I am changing to USB
> > > > > > serial...
> > > > > >
> > > > > > Once the USB -serial driver is loaded I am expecting the rest of the
> > > > > > logs on the console but I am getting AT command and no more
> > > > > > messages...
> > > > > >
> > > > > > Later I changed inittab file for the login prompt...
> > > > > >
> > > > > > I have the other serial connection through which I can control the
> > > > > > application. When I close that application, through the normal serial,
> > > > > > I am getting login prompt on both USB-serial and normal Serial.
> > > > > >
> > > > > > If I run the application again I am getting logs now on both serials...
> > > > > >
> > > > > > I am consfused why I am not getting the boot log messages...
> > > > > >
> > > > > > I am sure that I have set commandline parameter properly....
> > > > > >
> > > > > > Aristeu Rozanski has said above that ,,, it is not possoble to log
> > > > > > boot messages on the USB-serial ... what might be the techincal reason
> > > > > > ?
> > > > > >
> > > > > > Thanks
> > > > > > Prabhu
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > On 10/10/08, Greg KH <greg@kroah.com> wrote:
> > > > > > >
> > > > > > > A: No.
> > > > > > > Q: Should I include quotations after my reply?
> > > > > > >
> > > > > > > On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> > > > > > > > On 10/10/08, Prabhu Chawandi <prabhu.chavandi@gmail.com> wrote:
> > > > > > > > > Yeah...   I did all the configurations.
> > > > > > > > >
> > > > > > > > > Still not getting the logs :(
> > > > > > > > >
> > > > > > > > > I feel I am missing the part where USB- serial  will be registered to
> > > > > > > > > the tty layer.
> > > > > > > > >
> > > > > > > > > or Do I need to insert the code where we will be opening the device
> > > > > > > > > and performimg the write/read  operations.
> > > > > > >
> > > > > > > No code needs to be added.
> > > > > > >
> > > > > > > Please let us know what errors you are seeing, what does your kernel log
> > > > > > > messages show, and so on.  It should work properly if you tell the boot
> > > > > > > command line to use the usb-serial port for console messages.
> > > > > > >
> > > > > > > thanks,
> > > > > > >
> > > > > > > greg k-h
> > > > > > >
> > > > > >
> > > > >
> > > > --
> > > > To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> > > > the body of a message to majordomo@vger.kernel.org
> > > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > >
> > >
>
>

RE: Regarding Serial consloe

[Gupta, Ajay Kumar]

> -----Original Message-----
> From: Prabhu Chawandi [mailto:prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org]
> Sent: Monday, October 13, 2008 1:43 PM
> To: Gupta, Ajay Kumar
> Cc: Greg KH; Aristeu Rozanski; linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux-serial-u79uwXL29TY76Z2rM5mHXA@public.gmane.org;
> mangoo-Nem3ZqsbT/g@public.gmane.org
> Subject: Re: Regarding Serial consloe
> 
> Ajay,
>   Here is the link, where same issue is raised ...
> 
> And for that Greg has told ..  no kernel messages can be loggen on USB-serial.
> 
> Is that hold good today ? or can we produce logs on uSB serial console..

I tried it on v2.6.18 with prolific-2303 and it did work for me. I was able
to get console on usb serial.

Some of the bootup message didn't come on usb serial till usb serial part
got initialized.

Regards,
Ajay
 
> 
> 
> link:
> http://marc.info/?l=linux-usb-devel&m=119384398314558&q=raw
> 
> Thanks
> Prabhu
> 
> On 10/13/08, Gupta, Ajay Kumar <ajay.gupta-l0cyMroinI0@public.gmane.org> wrote:
> > >   Is USB fs not an auto fs ... ?
> > > I mean as we put the device we get the /dev/<device_id> created auto...
> > >
> > > I can see the /dev/ttyUSB0 entry.
> >
> >
> > If it is auto created then that entry is not required. Another thing that can
> > be tried is using default baudrate of 9600 as below.
> >
> > CONFIG_CMDLINE="rw console=ttyUSB0, 9600 mem =128M"
> > and in inittab
> > ttyUSB0::respawn:/bin/getty  -L ttyUSB0 9600 vt102
> >
> > Regards,
> > Ajay
> >
> > >
> > > Thanks
> > > Prabhu
> > >
> > > On 10/13/08, Gupta, Ajay Kumar <ajay.gupta-l0cyMroinI0@public.gmane.org> wrote:
> > > >
> > > > > CONFIG_CMDLINE="rw console=ttyUSB0, 115200 mem =128M"
> > > > >
> > > > > and in inittab
> > > > >
> > > > > ttyUSB0::respawn:/bin/getty  -L ttyUSB0 115200 vt102
> > > >
> > > > Apart from this add "mknod /dev/ttyUSB0 c 188 0" in "filesystem/etc/init.d/rcS"
> > > >
> > > > This is required if this node is not created during bootup and usb serial
> > > > device detection.
> > > >
> > > > Regards,
> > > > Ajay
> > > > >
> > > > >
> > > > > --Prabhu
> > > > >
> > > > > On 10/13/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > > > Some more updates :
> > > > > >
> > > > > >   I am using kernel 2.6.12.4.
> > > > > >
> > > > > > It was Tomasz Chmielewski who said that  boot messages cant be logged
> > > > > > on USB-serial. soory for the mistake Aristeu Rozanski .
> > > > > >
> > > > > > On 10/13/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > > > > Hi,
> > > > > > >
> > > > > > >   I am not getting any errors ....
> > > > > > >
> > > > > > > I have set the command line parameter. I am booting through  CFE ,
> > > > > > > This time I am using Serial console while booting I am changing to USB
> > > > > > > serial...
> > > > > > >
> > > > > > > Once the USB -serial driver is loaded I am expecting the rest of the
> > > > > > > logs on the console but I am getting AT command and no more
> > > > > > > messages...
> > > > > > >
> > > > > > > Later I changed inittab file for the login prompt...
> > > > > > >
> > > > > > > I have the other serial connection through which I can control the
> > > > > > > application. When I close that application, through the normal serial,
> > > > > > > I am getting login prompt on both USB-serial and normal Serial.
> > > > > > >
> > > > > > > If I run the application again I am getting logs now on both serials...
> > > > > > >
> > > > > > > I am consfused why I am not getting the boot log messages...
> > > > > > >
> > > > > > > I am sure that I have set commandline parameter properly....
> > > > > > >
> > > > > > > Aristeu Rozanski has said above that ,,, it is not possoble to log
> > > > > > > boot messages on the USB-serial ... what might be the techincal reason
> > > > > > > ?
> > > > > > >
> > > > > > > Thanks
> > > > > > > Prabhu
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > On 10/10/08, Greg KH <greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> wrote:
> > > > > > > >
> > > > > > > > A: No.
> > > > > > > > Q: Should I include quotations after my reply?
> > > > > > > >
> > > > > > > > On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> > > > > > > > > On 10/10/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > > > > > > > Yeah...   I did all the configurations.
> > > > > > > > > >
> > > > > > > > > > Still not getting the logs :(
> > > > > > > > > >
> > > > > > > > > > I feel I am missing the part where USB- serial  will be registered to
> > > > > > > > > > the tty layer.
> > > > > > > > > >
> > > > > > > > > > or Do I need to insert the code where we will be opening the device
> > > > > > > > > > and performimg the write/read  operations.
> > > > > > > >
> > > > > > > > No code needs to be added.
> > > > > > > >
> > > > > > > > Please let us know what errors you are seeing, what does your kernel log
> > > > > > > > messages show, and so on.  It should work properly if you tell the boot
> > > > > > > > command line to use the usb-serial port for console messages.
> > > > > > > >
> > > > > > > > thanks,
> > > > > > > >
> > > > > > > > greg k-h
> > > > > > > >
> > > > > > >
> > > > > >
> > > > > --
> > > > > To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> > > > > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> > > > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > > >
> > > >
> >
> >

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Regarding Serial consloe

[Prabhu Chawandi]

Ajay,

   I did all configurations in the clean sandbox ....

Even then I am not getting a log ...

Is it a problem as I am running with 2.6.12 ...

from then onwards pl2303/usb_serial drivers have changed drastically ?

Thanks
Prabhu

On 10/13/08, Gupta, Ajay Kumar <ajay.gupta-l0cyMroinI0@public.gmane.org> wrote:
> > -----Original Message-----
> > From: Prabhu Chawandi [mailto:prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org]
> > Sent: Monday, October 13, 2008 1:43 PM
> > To: Gupta, Ajay Kumar
> > Cc: Greg KH; Aristeu Rozanski; linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux-serial-u79uwXL29TY76Z2rM5mHXA@public.gmane.org;
> > mangoo-Nem3ZqsbT/g@public.gmane.org
> > Subject: Re: Regarding Serial consloe
> >
> > Ajay,
> >   Here is the link, where same issue is raised ...
> >
> > And for that Greg has told ..  no kernel messages can be loggen on USB-serial.
> >
> > Is that hold good today ? or can we produce logs on uSB serial console..
>
> I tried it on v2.6.18 with prolific-2303 and it did work for me. I was able
> to get console on usb serial.
>
> Some of the bootup message didn't come on usb serial till usb serial part
> got initialized.
>
> Regards,
> Ajay
>
> >
> >
> > link:
> > http://marc.info/?l=linux-usb-devel&m=119384398314558&q=raw
> >
> > Thanks
> > Prabhu
> >
> > On 10/13/08, Gupta, Ajay Kumar <ajay.gupta-l0cyMroinI0@public.gmane.org> wrote:
> > > >   Is USB fs not an auto fs ... ?
> > > > I mean as we put the device we get the /dev/<device_id> created auto...
> > > >
> > > > I can see the /dev/ttyUSB0 entry.
> > >
> > >
> > > If it is auto created then that entry is not required. Another thing that can
> > > be tried is using default baudrate of 9600 as below.
> > >
> > > CONFIG_CMDLINE="rw console=ttyUSB0, 9600 mem =128M"
> > > and in inittab
> > > ttyUSB0::respawn:/bin/getty  -L ttyUSB0 9600 vt102
> > >
> > > Regards,
> > > Ajay
> > >
> > > >
> > > > Thanks
> > > > Prabhu
> > > >
> > > > On 10/13/08, Gupta, Ajay Kumar <ajay.gupta-l0cyMroinI0@public.gmane.org> wrote:
> > > > >
> > > > > > CONFIG_CMDLINE="rw console=ttyUSB0, 115200 mem =128M"
> > > > > >
> > > > > > and in inittab
> > > > > >
> > > > > > ttyUSB0::respawn:/bin/getty  -L ttyUSB0 115200 vt102
> > > > >
> > > > > Apart from this add "mknod /dev/ttyUSB0 c 188 0" in "filesystem/etc/init.d/rcS"
> > > > >
> > > > > This is required if this node is not created during bootup and usb serial
> > > > > device detection.
> > > > >
> > > > > Regards,
> > > > > Ajay
> > > > > >
> > > > > >
> > > > > > --Prabhu
> > > > > >
> > > > > > On 10/13/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > > > > Some more updates :
> > > > > > >
> > > > > > >   I am using kernel 2.6.12.4.
> > > > > > >
> > > > > > > It was Tomasz Chmielewski who said that  boot messages cant be logged
> > > > > > > on USB-serial. soory for the mistake Aristeu Rozanski .
> > > > > > >
> > > > > > > On 10/13/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > > > > > Hi,
> > > > > > > >
> > > > > > > >   I am not getting any errors ....
> > > > > > > >
> > > > > > > > I have set the command line parameter. I am booting through  CFE ,
> > > > > > > > This time I am using Serial console while booting I am changing to USB
> > > > > > > > serial...
> > > > > > > >
> > > > > > > > Once the USB -serial driver is loaded I am expecting the rest of the
> > > > > > > > logs on the console but I am getting AT command and no more
> > > > > > > > messages...
> > > > > > > >
> > > > > > > > Later I changed inittab file for the login prompt...
> > > > > > > >
> > > > > > > > I have the other serial connection through which I can control the
> > > > > > > > application. When I close that application, through the normal serial,
> > > > > > > > I am getting login prompt on both USB-serial and normal Serial.
> > > > > > > >
> > > > > > > > If I run the application again I am getting logs now on both serials...
> > > > > > > >
> > > > > > > > I am consfused why I am not getting the boot log messages...
> > > > > > > >
> > > > > > > > I am sure that I have set commandline parameter properly....
> > > > > > > >
> > > > > > > > Aristeu Rozanski has said above that ,,, it is not possoble to log
> > > > > > > > boot messages on the USB-serial ... what might be the techincal reason
> > > > > > > > ?
> > > > > > > >
> > > > > > > > Thanks
> > > > > > > > Prabhu
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > On 10/10/08, Greg KH <greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> wrote:
> > > > > > > > >
> > > > > > > > > A: No.
> > > > > > > > > Q: Should I include quotations after my reply?
> > > > > > > > >
> > > > > > > > > On Fri, Oct 10, 2008 at 03:28:56PM +0530, Prabhu Chawandi wrote:
> > > > > > > > > > On 10/10/08, Prabhu Chawandi <prabhu.chavandi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > > > > > > > > > Yeah...   I did all the configurations.
> > > > > > > > > > >
> > > > > > > > > > > Still not getting the logs :(
> > > > > > > > > > >
> > > > > > > > > > > I feel I am missing the part where USB- serial  will be registered to
> > > > > > > > > > > the tty layer.
> > > > > > > > > > >
> > > > > > > > > > > or Do I need to insert the code where we will be opening the device
> > > > > > > > > > > and performimg the write/read  operations.
> > > > > > > > >
> > > > > > > > > No code needs to be added.
> > > > > > > > >
> > > > > > > > > Please let us know what errors you are seeing, what does your kernel log
> > > > > > > > > messages show, and so on.  It should work properly if you tell the boot
> > > > > > > > > command line to use the usb-serial port for console messages.
> > > > > > > > >
> > > > > > > > > thanks,
> > > > > > > > >
> > > > > > > > > greg k-h
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > --
> > > > > > To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> > > > > > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> > > > > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > > > >
> > > > >
> > >
> > >
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html