Modem ESS Technology ES2838/2839 SuperLink Modem installation

This instructions works only with kernels compiled with gcc 2.9x. This instructions doesn't work with kernels compiled with gcc 3.x (Red Hat 8.0).

This installation is assembled by instructions MINI-FAQ about the ESS modem driver. Modem ES2838 requires kernel 2.4.18, which is part of distribution Red Hat 7.3. Modem probably not work on older kernels.

For installation you will need this files:

esscom_orig.o
fixscript17
install
fixscript18
ess_resolver.c

I suppose, that you have downloaded files into directory /root/download/ES2839_2.4.18, but it is not needfully. Use command cd /root/download/ES2839_2.4.18 for moving to working directory. Use command ls for assure yourself. Unresolved symbols you can repair with two ways.

fixscript

First way is usage script fixscript17 or fixscript18 . Use script sh fixscript17 esscom_orig.o esscom.o for fixing module esscom.

cd /root/download/ES2839_2.4.18
ls
sh fixscript17 esscom_orig.o esscom.o

Module esscom.o fixing

Log file of script must not contain any error. You get corrected module esscom.o. After it you can run installation script sh install.

sh install

Module esscom.o installation

ess_resolver

Author of this program is lordbuffy.

Second way is using program ess_resolver. You must compile program. I must repare direcroty include before compiling. Před kompilací jsem musel provést opravu cesty include. I renamed directory /usr/include/linux to /usr/include/linux-orig. After it I made link to directory /usr/src/linux-2.4.18-3/include/linux.

cd /usr/include
mv linux linux-orig
ln -s /usr/src/linux-2.4.18-3/include/linux linux

Directory repairing

After it I compiled the program.

gcc ess_resolver.c -o ess_resolver

Compiling ess_resolver.c

After successful compiling you can repair unresolved symbols. Rename esscom_orig.o to esscom.o. You can list unresolved symbols with program depmod.

mv esscom_orig.o esscom.o
depmod -e esscom.o

List of unresolved symbols

Now you can repair unresolved symbols with program ess_resolver.

./ess_resolver esscom.o
depmod -e esscom.o

Repairing unresolved symbols

If list is clear from unresolved symbols you can use module esscom.o.

Module installing

Create directory /lib/modules/kernel/misc and copy there file esscom.o. Change word kernel in name of directory in exchange for number of your kernel, I use 2.4.18-3.

Module esscom.o copy

Open file /etc/rc.d/rc.local and on end of file write command for module installation insmod esscom. This command install module into kernel after each start.

# /etc/rc.d/rc.local
insmod esscom

Installation is finished and you can connect to Internet.

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