Atheros AR6001

[William Stucker]

Hi, I recently asked a question about a PNP error that I was having with 
the Atheros AR6001 patches, to which I got an excellent and through 
reply from Andy Green which was much appreciated. However, having 
corrected that mistake, I now am having DMA problems, unfortunately it 
does not seem like a similar dependency to the PNP error I had before. 
The error is below, followed by the previous message.





drivers/built-in.o(.text+0x118dc): In function `pnp_check_dma':
drivers/pnp/resource.c:437: undefined reference to `request_dma'
drivers/built-in.o(.text+0x118fc):drivers/pnp/resource.c:439: undefined 
reference to `free_dma'
make: *** [.tmp_vmlinux1] Error 1


Thank you for any advice you can give me,
-Wil


Somebody in the thread at some point said:

>  Hi, I'm a student at Boston University, trying to implement an Atheros
> > AR6001 Wifi chip on an I(ntel)Mote2. Our os for the Imote2 is 2.6.24
> > kernel. Basically, I'm trying to create my own updated kernel for the
> > Imote2. I am using a patch from
> > (www-sigproc.eng.cam.ac.uk/%7Ejic23/IMOTE2/) which I think is a
> > defconfig to auto set the kernel up for the Imote2. I'm then using the
> > Atheros patches modified by Samuel Ortiz.
>   

Ooh it's nice if people are able to re-use the work Openmoko funded there!


> > I can get the kernel to compile and it is bootable, but when I go to
> > make the modules, I get thrown an error because some stuff thats
> > required for the SDIO modules for the Atheros chip is not defined in my
> > patch for the Imote2.
> > 
> > The error occurs doing "make modules"
> > 
> > drivers/sdio/stack/busdriver/sdio_bus_os.c:363:2:#error "CONFIG_PNP not
> > defined"
>   

If you do

make ARCH=arm menuconfig

and have a look in "device drivers", "Plug and Play support" should be
the fifth guy down, make sure he is selected like [*].  I guess for
xscale it is still ARCH=arm.  In the Kconfig for it at

./drivers/pnp/Kconfig

it says

menuconfig PNP
        bool "Plug and Play support"
        depends on HAS_IOMEM
        depends on ISA || ACPI || SDIO  <========

so make sure you enabled the SDIO stack that is part of the Atheros
driver in your config too.  Seems to be

CONFIG_SDIO=y
CONFIG_SDIO_AR6000_WLAN=y

Be aware though this driver is sensitive to the firmware version you
have on your physical wireless device, IIRC we use some magic "89"
firmware, but I don't know much about it.

- -Andy


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