Matthew Dharm <mdharm-kernel@one-eyed-alien.net> wrote:
> However, the usb-storage development team is working on implementing
> support for a USB SmartMedia reader/writer. To do this, we need to have
> code which can take care of this re-mapping system. We're wondering if
> anyone out there has such code allready (perhaps even in use with Linux).
Not and have it architecturally independant. IIRC, ioremap()
of a PCI memory region must be used on all architectures, and
simply dereferencing the pointer to that memory won't work
on many architectures - with the *notable* exception of x86.
I would recommend creating a block device, where each
block corresponds to a flash memory segment. Then, in your
block handler, use the readl()/writel() IO macros to access
the remapped PCI region and thanser data to the blocks request.
Simple, easy, and would allow the mounting of a FAT filesystem
on the SmartMedia...
IIRC, there should be hooks in the block layer to allow
you to do control the re-ordering of blocks to minimize the
number of write cycles.
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This archive was generated by hypermail 2b29 : Thu Jul 27 2000 - 19:12:03 EDT