@ -91,19 +91,37 @@ safety check before resetting the board upon completion of the reflash.
PCI:
====
This board and U-Boot have been tested with PCI built in, on a SBC8349
and confirmed that the "pci" command showed the intel e1000 that was
present in the PCI slot. Note that if a 33MHz 32bit card is inserted
in the slot, then the whole board will clock down to a 33MHz base
clock instead of the default 66MHz. This will change the baud clocks
and mess up your serial console output. If you want to use a 33MHz PCI
card, then you should build a U-Boot with #undef PCI_66M in the
include/configs/sbc8349.h and store this to flash prior to powering down
the board and inserting the 33MHz PCI card.
By default PCI support is disabled to better support very early
revision MPC834x chips with possible PCI issues. Also PCI support is
untested on the sbc8347 variants at this point in time.
Paul Gortmaker, 01/2007
There are three configuration choices:
sbc8349_config
sbc8349_PCI_33_config
sbc8349_PCI_66_config
The 1st does not enable CONFIG_PCI, and assumes that the PCI slot
will be left empty (M66EN high), and so the board will operate with
a base clock of 66MHz. Note that you need both PCI enabled in u-boot
and linux in order to have functional PCI under linux. The only
reason for choosing to not enable PCI would be if you had a very
early (rev 1.0) CPU with possible PCI issues.
The second enables PCI support and builds for a 33MHz clock rate. Note
that if a 33MHz 32bit card is inserted in the slot, then the whole board
will clock down to a 33MHz base clock instead of the default 66MHz. This
will change the baud clocks and mess up your serial console output if you
were previously running at 66MHz. If you want to use a 33MHz PCI card,
then you should build a U-Boot with sbc8349_PCI_33_config and store this
to flash prior to powering down the board and inserting the 33MHz PCI
card.
The third option builds PCI support in, and leaves the clocking at the
default 66MHz. This has been tested with an intel PCI-X e1000 card.
This is also the appropriate choice for people with a recent (non 1.0)
CPU who currently have the PCI slot physically empty, but intend to
possibly add a PCI-X card at a later date.
=> pci
Scanning PCI devices on bus 0
BusDevFun VendorId DeviceId Device Class Sub-Class
_____________________________________________________________
00.00.00 0x1957 0x0080 Processor 0x20
00.11.00 0x8086 0x1026 Network controller 0x00
=>
Paul Gortmaker
16 years ago
committed by
Kim Phillips