Re: ARM-Linux & ARM Development/Evaluation Board

[Russell King - ARM Linux Admin]

Robert Kondner writes:
>   What I need to know from the ARM Linux camp is what set of
> IO devices should be included. I need to receive suggestion
> on the ethernet component and video chipset. I have worked
> with SMC 91C94 ethernet but I do not know if this is supported
> in Linux. 

The SMC 91C94 does appear to be supported, however it has never
been tried to my knowledge with ARM Linux.
 
>   For video a Chip & Tech 65545 will support CRT and LCD
> displays. A high performance PCI chipset for VGA - XVGA 
> would be nice, can someone suggest. 

I currently like the S3 chipsets, but I haven't found the support
in Linux to be very good (I run mine in standard VGA only at the
moment).

The advantage of the S3 stuff is that the register documentation
is available, whereas other chipsets (eg, IGS Cyber2000 used in
the NetWinder is NDA).

My understanding of the VGA market is that most manufacturers
only give out information on their chipsets under NDA, which I
don't think is going to be of much use to us.

>   How does Linux deal with a keyboard, must I use a 8042 based
> keyboard controller or can Linux support the keyboard through
> a more simple hardware interface. (I have done bit banged
> AT keyboard code, it can be a real pain.)

The Acorn RiscPC uses a PS/2 compatable keyboard, which is wired
into a what is effectively a custom UART.  Therefore, there is
a driver for a directly connected PS/2 keyboard - see
drivers/acorn/char/keyb_ps2.c
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