Re: Device Drivers for SH devices

[Manuel L. <ma...@ro...>]

Hi,

> I'm looking for drivers for the sh3 onchip devices. I have only scif
> functional by now in 2.6. Most of the onchip devices were supportet in
> 2.4, but the drivers were never in vanilla.
> 
> I have drivers for the following SH7720 onchip devices, but only for 2.4
> usb-host, which was based on the generic usb-ohci.c
> usb-gadget, is also listet on the usb-gadget site, but seems to be 2.4
> only
> LCD controller (found nowhere else)
> 
> Does anybody know if there are recent versions of these drivers?

Free drivers for recent Linux kernels are almost non-existant;
fortunately the datasheets are quite good (compared to other embedded SoCs I'm
working with..) and writing linux drivers isn't that hard ;-)

That said, did you have a look at the CE-Linux tree(s)?

> I also had the smsc9115 ethernet controller working in 2.4 with the sh3
> driver from the smsc homepage. There is a SMSC911X driver in 2.6, but it
> is only for Xscale (ARCH_PXA), has anybody already portet it on SH? 

Have a look at the smc91x.h which works in similar ways:
in theory you have to add something like this (if your board
has the chip on a 16bit bus) to the smc911x.h file:

#ifdef CONFIG_MY_SH_BOARD
#define SMC_USE_16BIT	1
#endif

Then register a platform device for the "smc911x" device with appropriate
MMIO and IRQ in the board setup code.


	Manuel Lauss