Next steps

Next steps

[Brian Hawley]

We've finally gotten the 2.5 kernel to boot using u-boot [ 2.6.3 doesn't,
nor did 2.4 variants ] on a PPC440GP
on the Ebony board.

At this point, it is trying to talk to a dhcp/bootp server and get a NFS
root filesystem.

Eventually, we'll be porting this to a custom board with some other chip
set support on it.

Our application will essentially be data acquisition and
transmission.  We'll be talking to the chipset to
suck data off [ and push data ] and on the other side push/pull data from
the PCI bus.

Linux is probably overkill for this, but we wanted a development platform
we could extend in the future
more readily.

I'm curious as to the direction people think we should take at this
point.  Should we be trying to set up
a root NFS filesystem [ presumably because it is easier to change -- and
then moving it to an initrd ? ]?

What do we need on the NFS filesystem...

What resources can you point me to to help us make the transition to the
next level.

Any help is appreciated,

Thanks.

-- Brian

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: Next steps

[Bob White]

> I'm curious as to the direction people think we should take at this
> point.  Should we be trying to set up
> a root NFS filesystem [ presumably because it is easier to change -- and
> then moving it to an initrd ? ]?
>
> What do we need on the NFS filesystem...
>

Are you using the ELDK?  Have you seen:

http://www.denx.de/twiki/bin/view/DULG/ELDKMountingTargetComponentsViaNF
S

Bob
--
Robert B. White        Perigee, A Division of Sensis Corp
Software Design Engr   316 Commerce Blvd.
TEL: 315.453.7842x29   Liverpool, NY  13088
FAX: 315.453.7917      www.Perigee.com


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: Next steps

[Mark Chambers]

Bob,

I would definitely recommend NFS.  As Bob White pointed out, you can get a
directory structure all set up from eldk.  The thing about NFS is you have a
PC with visual tools and all to mess with the same files that your embedded
system is accessing.  Plus of course you have much more file space.  And if
you're new to Linux it's a whole lot easier to get up to speed on the PC.

dhcp & bootp are really different things from NFS, although I think you have
to enable them in the [embedded] kernel for nfsboot to work.  But you
probably want to set your board up with a fixed IP and compressed kernel (or
tftp it in) from u-boot, just feeding a command line to the kernel that
tells it the root is nfs something.  No sense adding more complexity than
you need!

When it comes to stand-alone booting of an embedded system you can also
consider jffs2 or cramfs instead of initrd.  (I can tell you more if you're
interested).

Mark Chambers
WV Computronics


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Next steps

[chris]

Hey gang,

I'm trying to work on issue 305, suspend/resume for cs46xx.

I'm running CentOS 5, so I'd like to work on what's current for that 
distribution first, and patch to latest if needed after that.

I think I have the correct source package, but the only mention of cs46xx 
I could find in the source is a configuration file. Running make doesn't 
make the cs46xx module, AFAICT.

Which source (package)(s) should I have?

How do I track down the source file(s) I need to examine?

Thanks,
Chris

Re: Next steps

[Takashi Iwai]

At Tue, 29 May 2007 09:55:22 -0500 (CDT),
chris@idlelion.net wrote:
> 
> Hey gang,
> 
> I'm trying to work on issue 305, suspend/resume for cs46xx.
> 
> I'm running CentOS 5, so I'd like to work on what's current for that 
> distribution first, and patch to latest if needed after that.
> 
> I think I have the correct source package, but the only mention of cs46xx 
> I could find in the source is a configuration file. Running make doesn't 
> make the cs46xx module, AFAICT.
> 
> Which source (package)(s) should I have?

The driver codes are usually included in the kernel source tree.  What
you've seen are the alsa-lib and alsa-utils packages, I guess.

Anyway, if you want to debug the driver, build the alsa driver
externally from the latest ALSA HG tree.  So, there is no
corresponding "distro packages" at all.


Takashi

Re: Next steps

[chris]

On Tue, 29 May 2007, Takashi Iwai wrote:

> At Tue, 29 May 2007 09:55:22 -0500 (CDT),
> chris@idlelion.net wrote:
>> Which source (package)(s) should I have?
>
> The driver codes are usually included in the kernel source tree.  What
> you've seen are the alsa-lib and alsa-utils packages, I guess.
>
> Anyway, if you want to debug the driver, build the alsa driver
> externally from the latest ALSA HG tree.  So, there is no
> corresponding "distro packages" at all.

> Takashi

Thanks!

As it happens, I'm going to a talk on Mercurial tonight.

There are a bunch of repositories. Would I want Driver or Kernel?

Chris

Re: Next steps

[Takashi Iwai]

At Tue, 29 May 2007 11:52:55 -0500 (CDT),
chris@idlelion.net wrote:
> 
> On Tue, 29 May 2007, Takashi Iwai wrote:
> 
> > At Tue, 29 May 2007 09:55:22 -0500 (CDT),
> > chris@idlelion.net wrote:
> >> Which source (package)(s) should I have?
> >
> > The driver codes are usually included in the kernel source tree.  What
> > you've seen are the alsa-lib and alsa-utils packages, I guess.
> >
> > Anyway, if you want to debug the driver, build the alsa driver
> > externally from the latest ALSA HG tree.  So, there is no
> > corresponding "distro packages" at all.
> 
> > Takashi
> 
> Thanks!
> 
> As it happens, I'm going to a talk on Mercurial tonight.
> 
> There are a bunch of repositories. Would I want Driver or Kernel?

Both alsa-driver and alsa-kernel are repos for ALSA drivers, so you
need both.  The latter contains the source codes to be merged to linux
kernel tree while the former contains the stuff for building the
modules.

It's not always necessary to use HG version of alsa-lib, utils and
others.  But, at least, it's safe and recommended to use the latest
version of alsa-lib and utils together with alsa-driver.


Takashi

Re: Next steps

[Chris Schumann]

Takashi Iwai wrote:
> At Tue, 29 May 2007 11:52:55 -0500 (CDT),
> chris@idlelion.net asked about alsa development
 > ...
> Both alsa-driver and alsa-kernel are repos for ALSA drivers, so you
> need both.  The latter contains the source codes to be merged to linux
> kernel tree while the former contains the stuff for building the
> modules.
> 
> It's not always necessary to use HG version of alsa-lib, utils and
> others.  But, at least, it's safe and recommended to use the latest
> version of alsa-lib and utils together with alsa-driver.
> 
> 
> Takashi

I'm running CentOS 5 and would like to keep the machine working for its 
owner while I try to fix the sound driver.

I cloned alsa-driver and alsa-kernel from the hg repository. In 
alsa-driver is a file called INSTALL.

Step 1 says I need full configured source for the kernel. "yum install 
kernel-devel" seemed to do that.

Step 2 says turn on sound support. No idea what that means.

Step 3 says run ./configure. That file doesn't exist. There is a 
configure.in that says it should be run through autoconf. If there's an 
automated script to do that, its location isn't obvious.

There are over 4000 lines in the cs46xx module, so any tips on what's 
important (other than the actual suspend and resume functions that I've 
found) and where to start a search would be helpful too.

Thanks,
Chris

Re: Next steps

[Tobin Davis]

Try running "./hgcompile".  It will rebuild the ./configure script and
build the drivers for you.

On Sat, 2007-06-02 at 22:47 -0500, Chris Schumann wrote:

> Takashi Iwai wrote:
> > At Tue, 29 May 2007 11:52:55 -0500 (CDT),
> > chris@idlelion.net asked about alsa development
>  > ...
> > Both alsa-driver and alsa-kernel are repos for ALSA drivers, so you
> > need both.  The latter contains the source codes to be merged to linux
> > kernel tree while the former contains the stuff for building the
> > modules.
> > 
> > It's not always necessary to use HG version of alsa-lib, utils and
> > others.  But, at least, it's safe and recommended to use the latest
> > version of alsa-lib and utils together with alsa-driver.
> > 
> > 
> > Takashi
> 
> I'm running CentOS 5 and would like to keep the machine working for its 
> owner while I try to fix the sound driver.
> 
> I cloned alsa-driver and alsa-kernel from the hg repository. In 
> alsa-driver is a file called INSTALL.
> 
> Step 1 says I need full configured source for the kernel. "yum install 
> kernel-devel" seemed to do that.
> 
> Step 2 says turn on sound support. No idea what that means.
> 
> Step 3 says run ./configure. That file doesn't exist. There is a 
> configure.in that says it should be run through autoconf. If there's an 
> automated script to do that, its location isn't obvious.
> 
> There are over 4000 lines in the cs46xx module, so any tips on what's 
> important (other than the actual suspend and resume functions that I've 
> found) and where to start a search would be helpful too.
> 
> Thanks,
> Chris
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

-- 
Tobin Davis <tdavis@dsl-only.net>