As I'm not having the kernel source code, the alternative option to install the driver was:
"If can not compile the source code, try to rename the /usr/src/linux-2.x -> /usr/src/linux"
Unfortunately I didn't have nor such directory nor the chance to rename it, so I had to give up after many tries all of which ended with compilation problems (files or directories missing).
Now I'm downloading 2 Fedora 12 (improved sound) DVD disks, one of them includes the source code.
Following I'm copying the readme file which was my guide for driver installation:
The source code copy from www.alsa-project.org
Linux Source Code for ALC audio codec
This Source Code is from www.alsa-project.org
For driver installation, please follow below steps.
Step 1. unzip source code
tar xfvj azx-021705.tar.bz2
Step 2. Turn on sound support (soundcore module, default turn on)
Step 3. Complied source code
c. make install
Step 4. Edit your /etc/modules.conf or conf.modules depending on the distribution
(Please refer to the attached modules.conf)
Step 5. reboot your machine
Note: 1. The most detail information, can refer the alsa-kernel/Documenttation/ALSA-Configuration.txt in the azx-021705.tar.bz2.
2. Kernel Version must be 2.2.14 or later.
3. All mixer channels are muted by default. You must use a native
or OSS mixer program to unmute appropriate channels.
4. If can not compile the source code, try to rename the /usr/src/linux-2.x -> /usr/src/linux.
5. The driver added to support the SPDIF functoin.
6. Suggest use alsamixer to control mixer function. you can find it in the alsa-utils-0.9.4 (www.alsa-project.org
7. a. You can download the alsa-lib-1.0.8 and alsa-utils-1.0.8 form the www.alsa-project.org
, then unzip and install them.
b. Used "alsaconf" can autodetect which drive you need to install (step 4).