Hello,
How are ports numbered/ordered in the case of an EHCI controller
with a companion controller?
Example: N_PORTS = 6
AND
N_CC = 2
N_PCC = 3
OR PORTROUTE[] = 1,1,1,2,2,2
Would give a routing configuration of:
EHCI port 1 = OHCI1 port 1 (not 2 or 3)
EHCI port 2 = OHCI1 port 2 (not 1 or 3)
EHCI port 3 = OHCI1 port 3 (not 1 or 2)
EHCI port 4 = OHCI2 port 1 etc.
EHCI port 5 = OHCI2 port 2
EHCI port 6 = OHCI2 port 3
Is this assumption correct?
The broader context of this question is, on ia64 systems, certain
EFI drivers only support 1.1. So imagine a scenario where one
might have two USB cdroms attached to the system, but only want
to boot off of one (or maybe something more plausible, a USB hard
drive and a USB cdrom, and are booting off the CD).
When the bootloader hands off to the kernel and says "use the
device attached to OHCI controller N, port M" will the value of M
change when the EHCI driver takes over?
Thanks.
/ac
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