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Old 04-24-2012, 08:15 AM   #1
igor012
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Build a module from another kernel


Hello,
Is it possible to use a module (wacom) from a more recent kernel ? My current kernel is 3.1.2 and the one I want to use the module from is 3.4.

Thank you
 
Old 04-24-2012, 08:25 AM   #2
TobiSGD
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Modules from different kernels are not compatible. Just build the driver for your kernel instead, maybe this can help: http://sourceforge.net/apps/mediawik...itle=Main_Page
 
Old 04-24-2012, 09:41 AM   #3
igor012
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Even if I recompile it for my current kernel ?
 
Old 04-24-2012, 09:42 AM   #4
TobiSGD
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If you compile it for your current kernel then it is not a module for a different kernel. Modules are binary compiled drivers.
 
Old 04-24-2012, 02:14 PM   #5
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If you are compiling your code then also you must be ready to get some errors....well it depends if there is a change of function or even the position of some data structure then it'll be giving some problems...to solve that you have to see the kernel source......
 
Old 04-27-2012, 08:45 AM   #6
sundialsvcs
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Well, a better answer would be, "it depends." Take your driver in source form, attempt to compile it with reference to your kernel sources. (Which you'll have to do anyhow.) If it compiles okay, try it. But if it doesn't, you're faced with rewriting it. (And there's where I'd hit the proverbial STOP button, and look for "plan B.")

But, first, I would search carefully for a Wacom tablet driver that is built for your kernel, or seriously consider upgrading your kernel. I just don't think that you really are "cutting new ground" here, unless you mean it as an exercise.
 
Old 05-02-2012, 11:19 AM   #7
igor012
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Hello,
When you say
Quote:
Take your driver in source form, attempt to compile it with reference to your kernel sources
I just have to copy the files related to it into the source folder, right ?
 
Old 05-03-2012, 06:42 AM   #8
emntech
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Try this:

1) Download the kernel source code (linux-3.4 or whichever your want)
2) create a directory some where, like:
$mkdir wacom_module
3) copy wacom files to the 'wacom_module' directory.
cp ~/linux-3.4/drivers/input/tablet/wacom* wacom_module
4) Write a Makefile like this in the wacom_module directory.
$vim Makefile
wacom-objs := wacom_wac.o wacom_sys.o

obj-m = wacom.o

all:
<TAB>make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

5) Use the 'make' command to compile the module
$make

You will get wecam module with the name 'wacom.ko' in the 'wacom_module' directory

To use this module, insert the module using insmod command.
$sudo insmod ./wacom.ko
 
Old 05-03-2012, 11:40 AM   #9
igor012
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here is the output of make
Quote:
make -C /lib/modules/3.1.2-1.4-desktop/build M=/mnt/fab/wacom-build modules
make[1]: Entering directory `/mnt/fab/kernelbuild/build/linux-3.1.2'
CC [M] /mnt/fab/wacom-build/wacom_wac.o
CC [M] /mnt/fab/wacom-build/wacom_sys.o
/mnt/fab/wacom-build/wacom_sys.c:1214: warning: data definition has no type or storage class
/mnt/fab/wacom-build/wacom_sys.c:1214: warning: type defaults to ‘int’ in declaration of ‘module_usb_driver’
/mnt/fab/wacom-build/wacom_sys.c:1214: warning: parameter names (without types) in function declaration
/mnt/fab/wacom-build/wacom_sys.c:1203: warning: ‘wacom_driver’ defined but not used
LD [M] /mnt/fab/wacom-build/wacom.o
Building modules, stage 2.
MODPOST 1 modules
CC /mnt/fab/wacom-build/wacom.mod.o
LD [M] /mnt/fab/wacom-build/wacom.ko
make[1]: Leaving directory `/mnt/fab/kernelbuild/build/linux-3.1.2'
And then insmod ./wacom.ko right after but nothing happened.
 
Old 05-03-2012, 11:47 AM   #10
emntech
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Nothing will happen. Your wecam driver module loaded. Now you need to know how to use your driver.
How did you use this wacom in linux-3.1?.
 
Old 05-03-2012, 11:59 AM   #11
igor012
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Yes i did with another tablet.
I am using kcmshell4 kcm_wacomtablet to configure it.

EDIT
It's at least supposed to be working as a mouse

Last edited by igor012; 05-04-2012 at 05:14 AM.
 
  


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