Does DiskonChip work on IDT RC32334 CPU(MIPS)?
dwmw2 at infradead.org
Mon Oct 22 07:06:51 EDT 2001
changyj at uat.com.tw said:
> My embedded linux system is MIPS(IDT RC32334 RISC CPU). The BIOS can
> detect DiskOnChip at 0xB2000000 address.
> How do I setup the physical address of DiskOnChip for Memory
> Technology Device Subsystem in Linux ? Is the address same as
It works on the Momenco Ocelot MIPS board - all the endianness funnies have
been worked out. Check that 0xb2000000 is a _physical_ address, not a
virtual address - it looks suspicious for a MIPS system, where normally
only addresses under 0x20000000 are easily accessible.
Also check how the DiskOnChip is wired up - whether its registers are 1
byte, 2 bytes or 4 bytes apart as the CPU sees them. Look at the various
forms of the ReadDOC_() and WriteDOC_() macros in include/linux/mtd/doc2000.h
and pick the correct one (or experiment).
Make sure the bus controller is set up properly for the wiring of the
DiskOnChip too - for the Ocelot, we had to do that ourself, because the
boot loader didn't (see the last two lines of momenco_ocelot_setup() in
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