[eepro100] 82557 PCI BAR0 BAR1 BAR2 inconsistencies..?
ashish anand" <email@example.com
Sat Sep 28 09:08:01 2002
since i don't have programmer's refrence manual for eepro100
card i have no idea about my query below.
.in 82557 PCI card it has resource requirement by BAR0 BAR1 and
BAR0 and BAR2 are PCI mem type while BAR1 is PCI io type.
till now whenever i have ported linux driver i always have used
only BAR1 that is a PCI IO type.
to the best of my remembrance even if don't initialise the BAR0
BAR2 in PCI bios it worked fine.
my query is ..
1.why there has been BAR1 and BAR2 requirement provisioned ..is
for any future extension ?
2.can i get card working without BAR1 ( PCI IO)
i am further confused as in my MIPS source tree i observe the
IOADDR = request_mem_region(for PCI BAR0 resource)
IOADDR= ioremap(IOADDR , length of PCI BAR0 resource)
then uses this IOADDR everywhere.
here it only uses BAR0 resource.
pls. help me.
PLS.CC TO ME AS I AMN'T YET SUBSCRIBED.....