Backported sbxfi driver (UNTESTED!)

[Takashi Iwai <tiwai@suse.de>]

Hi,

$SUBJECT is now on my sound-unstable git tree:
    git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-unstable-2.6.git
together with other experimental patches.

If you're using 2.6.27-rc* git tree, pull the master branch of the
tree above into yours, and run make oldconfig.  That is,
    % cd /your/git-tree
    % git pull git://...../sound-unstable-2.6.git master

If you are not using 2.6.27-rc*, or not familiar with git, you can try
alsa-driver-unstable snapshot tarball available at
    ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/snapshot/
Run configure, make and make install as usual ALSA-driver tarball.

(I didn't check whether the tarball correctly includes the sbxfi
 stuff.  It should have been generated automatically.  If not, wait
 for a while.  If it still doesn't include sbxfi code, please report.
 I'll fix it tomorrow morning.)

The driver is built only for 2.6.26 or later.  If you have an older
kernel, edit alsa-driver*/kconfig-vers and change the version of
CONFIG_SND_SBXFI to 2.6.24 or whatever you want.  Then run
./gitcompile, instead of configure in this case to update the
configure script.

**NOTE**
The driver is totally untested.  It's just compiled without errors,
but not reviewed after a quick writing.  So, don't expect it ever runs
at the first try.  A crash is highly possible.

There are some build conditions found in sound/pci/sbxfi/sbxfi.c,
starting with XXX_*.  You can change it if you want.  As default, it's
for non-fullduplex but accept different rates.  Not sure whether this
works at all.

Any test- (and better debugging-) reports are appreciated.


thanks,

Takashi