Problem with PCIe -> PCI bridge on MPC8377E-RDB

Hey Folks,

I have been trying to use a PCIe FireWire card on a MPC8377E-RDB board.

I have tried this with both the LTIB/BSP (2.6.25) and the head of the  
kernel.org tree (at least from a couple of days ago).

With 2.6.25, the PCIe buss(es) don't show up at all during boot.

With 2.6.31-rc? the PCIe busses do show up, and the PCIe -> PCI bridge  
is recognized, but no devices behind the bridge are probed or  
identified.

Here is the boot log:


[    0.000000] Linux version 2.6.31-rc5-00381-g7b2aa03-dirty (adminuser@debian.virtualboximages 
) (gcc version 4.3.2 (Sourcery G++ Lite 4.3-74) ) #32 Tue Aug 11  
17:32:27 EDT 2009
[    0.000000] console [udbg0] enabled
setup_arch: bootmem
mpc837x_rdb_setup_arch()
[    0.000000] Found FSL PCI host bridge at 0x00000000e0008500.  
Firmware bus number: 0->0
[    0.000000] PCI host bridge /pci@e0008500 (primary) ranges:
[    0.000000]  MEM 0x0000000090000000..0x000000009fffffff ->  
0x0000000090000000
[    0.000000]  MEM 0x0000000080000000..0x000000008fffffff ->  
0x0000000080000000 Prefetch
[    0.000000]   IO 0x00000000e0300000..0x00000000e03fffff ->  
0x0000000000000000
[    0.000000] No pci config register base in dev tree, using default
[    0.000000] Found FSL PCI host bridge at 0x00000000e0009000.  
Firmware bus number: 0->255
[    0.000000] PCI host bridge /pcie@e0009000  ranges:
[    0.000000]  MEM 0x00000000a8000000..0x00000000b7ffffff ->  
0x00000000a8000000
[    0.000000]   IO 0x00000000b8000000..0x00000000b87fffff ->  
0x0000000000000000
[    0.000000] No pci config register base in dev tree, using default
[    0.000000] Found FSL PCI host bridge at 0x00000000e000a000.  
Firmware bus number: 0->255
[    0.000000] PCI host bridge /pcie@e000a000  ranges:
[    0.000000]  MEM 0x00000000c8000000..0x00000000d7ffffff ->  
0x00000000c8000000
[    0.000000]   IO 0x00000000d8000000..0x00000000d87fffff ->  
0x0000000000000000

[...]

[    0.129452] PCI: Probing PCI hardware
[    0.133549] pci 0000:00:00.0: PME# supported from D0 D1 D2 D3hot
[    0.139448] pci 0000:00:00.0: PME# disabled
[    0.143727] pci 0000:00:0f.0: PME# supported from D0 D1 D2 D3hot
[    0.149624] pci 0000:00:0f.0: PME# disabled
[    0.154791] pci 0001:01:00.0: ignoring class b20 (doesn't match  
header type 01)
[    0.162100] pci 0001:01:00.0: PME# supported from D0 D1 D2 D3hot
[    0.168057] pci 0001:01:00.0: PME# disabled
[    0.202566] pci 0001:03:00.0: PCI bridge, secondary bus 0001:04
[    0.208477] pci 0001:03:00.0:   IO window: disabled
[    0.213311] pci 0001:03:00.0:   MEM window: disabled
[    0.218170] pci 0001:03:00.0:   PREFETCH window: disabled
[    0.223528] pci 0001:03:01.0: PCI bridge, secondary bus 0001:05
[    0.229399] pci 0001:03:01.0:   IO window: disabled
[    0.234239] pci 0001:03:01.0:   MEM window: disabled
[    0.239163] pci 0001:03:01.0:   PREFETCH window: disabled
[    0.244522] pci 0001:03:02.0: PCI bridge, secondary bus 0001:06
[    0.250394] pci 0001:03:02.0:   IO window: disabled
[    0.255234] pci 0001:03:02.0:   MEM window: disabled
[    0.260158] pci 0001:03:02.0:   PREFETCH window: disabled
[    0.265517] pci 0001:03:03.0: PCI bridge, secondary bus 0001:07
[    0.271389] pci 0001:03:03.0:   IO window: disabled
[    0.276229] pci 0001:03:03.0:   MEM window: disabled
[    0.281153] pci 0001:03:03.0:   PREFETCH window: disabled
[    0.286513] pci 0001:03:04.0: PCI bridge, secondary bus 0001:08
[    0.292384] pci 0001:03:04.0:   IO window: disabled
[    0.297224] pci 0001:03:04.0:   MEM window: disabled
[    0.302149] pci 0001:03:04.0:   PREFETCH window: disabled
[    0.307508] pci 0001:03:05.0: PCI bridge, secondary bus 0001:09
[    0.313380] pci 0001:03:05.0:   IO window: disabled
[    0.318220] pci 0001:03:05.0:   MEM window: disabled
[    0.323144] pci 0001:03:05.0:   PREFETCH window: disabled
[    0.328503] pci 0001:03:06.0: PCI bridge, secondary bus 0001:0a
[    0.334375] pci 0001:03:06.0:   IO window: disabled
[    0.339215] pci 0001:03:06.0:   MEM window: disabled
[    0.344139] pci 0001:03:06.0:   PREFETCH window: disabled
[    0.349498] pci 0001:03:07.0: PCI bridge, secondary bus 0001:0b
[    0.355370] pci 0001:03:07.0:   IO window: disabled
[    0.360210] pci 0001:03:07.0:   MEM window: disabled
[    0.365134] pci 0001:03:07.0:   PREFETCH window: disabled
[    0.370493] pci 0001:03:08.0: PCI bridge, secondary bus 0001:0c
[    0.376365] pci 0001:03:08.0:   IO window: disabled
[    0.381205] pci 0001:03:08.0:   MEM window: disabled
[    0.386129] pci 0001:03:08.0:   PREFETCH window: disabled
[    0.391489] pci 0001:03:09.0: PCI bridge, secondary bus 0001:0d
[    0.397360] pci 0001:03:09.0:   IO window: disabled
[    0.402200] pci 0001:03:09.0:   MEM window: disabled
[    0.407125] pci 0001:03:09.0:   PREFETCH window: disabled
[    0.412484] pci 0001:03:0a.0: PCI bridge, secondary bus 0001:0e
[    0.418356] pci 0001:03:0a.0:   IO window: disabled
[    0.423196] pci 0001:03:0a.0:   MEM window: disabled
[    0.428120] pci 0001:03:0a.0:   PREFETCH window: disabled
[    0.433479] pci 0001:03:0b.0: PCI bridge, secondary bus 0001:0f
[    0.439351] pci 0001:03:0b.0:   IO window: disabled
[    0.444191] pci 0001:03:0b.0:   MEM window: disabled
[    0.449115] pci 0001:03:0b.0:   PREFETCH window: disabled
[    0.454474] pci 0001:03:0c.0: PCI bridge, secondary bus 0001:10
[    0.460346] pci 0001:03:0c.0:   IO window: disabled
[    0.465186] pci 0001:03:0c.0:   MEM window: disabled
[    0.470110] pci 0001:03:0c.0:   PREFETCH window: disabled
[    0.475469] pci 0001:03:0d.0: PCI bridge, secondary bus 0001:11
[    0.481341] pci 0001:03:0d.0:   IO window: disabled
[    0.486181] pci 0001:03:0d.0:   MEM window: disabled
[    0.491105] pci 0001:03:0d.0:   PREFETCH window: disabled
[    0.496465] pci 0001:03:0e.0: PCI bridge, secondary bus 0001:12
[    0.502336] pci 0001:03:0e.0:   IO window: disabled
[    0.507176] pci 0001:03:0e.0:   MEM window: disabled
[    0.512101] pci 0001:03:0e.0:   PREFETCH window: disabled
[    0.517460] pci 0001:03:0f.0: PCI bridge, secondary bus 0001:13
[    0.523331] pci 0001:03:0f.0:   IO window: disabled
[    0.528172] pci 0001:03:0f.0:   MEM window: disabled
[    0.533096] pci 0001:03:0f.0:   PREFETCH window: disabled
[    0.538455] pci 0001:03:10.0: PCI bridge, secondary bus 0001:14
[    0.544327] pci 0001:03:10.0:   IO window: disabled
[    0.549167] pci 0001:03:10.0:   MEM window: disabled
[    0.554091] pci 0001:03:10.0:   PREFETCH window: disabled
[    0.559450] pci 0001:03:11.0: PCI bridge, secondary bus 0001:15
[    0.565322] pci 0001:03:11.0:   IO window: disabled
[    0.570162] pci 0001:03:11.0:   MEM window: disabled
[    0.575086] pci 0001:03:11.0:   PREFETCH window: disabled
[    0.580445] pci 0001:03:12.0: PCI bridge, secondary bus 0001:16
[    0.586317] pci 0001:03:12.0:   IO window: disabled
[    0.591157] pci 0001:03:12.0:   MEM window: disabled
[    0.596081] pci 0001:03:12.0:   PREFETCH window: disabled
[    0.601441] pci 0001:03:13.0: PCI bridge, secondary bus 0001:17
[    0.607312] pci 0001:03:13.0:   IO window: disabled
[    0.612151] pci 0001:03:13.0:   MEM window: disabled
[    0.617076] pci 0001:03:13.0:   PREFETCH window: disabled
[    0.622436] pci 0001:03:14.0: PCI bridge, secondary bus 0001:18
[    0.628308] pci 0001:03:14.0:   IO window: disabled
[    0.633148] pci 0001:03:14.0:   MEM window: disabled
[    0.638072] pci 0001:03:14.0:   PREFETCH window: disabled
[    0.643431] pci 0001:03:15.0: PCI bridge, secondary bus 0001:19
[    0.649303] pci 0001:03:15.0:   IO window: disabled
[    0.654143] pci 0001:03:15.0:   MEM window: disabled
[    0.659067] pci 0001:03:15.0:   PREFETCH window: disabled
[    0.664426] pci 0001:03:16.0: PCI bridge, secondary bus 0001:1a
[    0.670298] pci 0001:03:16.0:   IO window: disabled
[    0.675138] pci 0001:03:16.0:   MEM window: disabled
[    0.680062] pci 0001:03:16.0:   PREFETCH window: disabled
[    0.685421] pci 0001:03:17.0: PCI bridge, secondary bus 0001:1b
[    0.691293] pci 0001:03:17.0:   IO window: disabled
[    0.696133] pci 0001:03:17.0:   MEM window: disabled
[    0.701057] pci 0001:03:17.0:   PREFETCH window: disabled
[    0.706417] pci 0001:03:18.0: PCI bridge, secondary bus 0001:1c
[    0.712288] pci 0001:03:18.0:   IO window: disabled
[    0.717127] pci 0001:03:18.0:   MEM window: disabled
[    0.722053] pci 0001:03:18.0:   PREFETCH window: disabled
[    0.727412] pci 0001:03:19.0: PCI bridge, secondary bus 0001:1d
[    0.733284] pci 0001:03:19.0:   IO window: disabled
[    0.738123] pci 0001:03:19.0:   MEM window: disabled
[    0.743048] pci 0001:03:19.0:   PREFETCH window: disabled
[    0.748407] pci 0001:03:1a.0: PCI bridge, secondary bus 0001:1e
[    0.754279] pci 0001:03:1a.0:   IO window: disabled
[    0.759119] pci 0001:03:1a.0:   MEM window: disabled
[    0.764043] pci 0001:03:1a.0:   PREFETCH window: disabled
[    0.769402] pci 0001:03:1b.0: PCI bridge, secondary bus 0001:1f
[    0.775274] pci 0001:03:1b.0:   IO window: disabled
[    0.780113] pci 0001:03:1b.0:   MEM window: disabled
[    0.785038] pci 0001:03:1b.0:   PREFETCH window: disabled
[    0.790397] pci 0001:03:1c.0: PCI bridge, secondary bus 0001:20
[    0.796269] pci 0001:03:1c.0:   IO window: disabled
[    0.801109] pci 0001:03:1c.0:   MEM window: disabled
[    0.806033] pci 0001:03:1c.0:   PREFETCH window: disabled
[    0.811392] pci 0001:03:1d.0: PCI bridge, secondary bus 0001:21
[    0.817264] pci 0001:03:1d.0:   IO window: disabled
[    0.822104] pci 0001:03:1d.0:   MEM window: disabled
[    0.827029] pci 0001:03:1d.0:   PREFETCH window: disabled
[    0.832388] pci 0001:03:1e.0: PCI bridge, secondary bus 0001:22
[    0.838260] pci 0001:03:1e.0:   IO window: disabled
[    0.843100] pci 0001:03:1e.0:   MEM window: disabled
[    0.848024] pci 0001:03:1e.0:   PREFETCH window: disabled
[    0.853383] pci 0001:03:1f.0: PCI bridge, secondary bus 0001:23
[    0.859255] pci 0001:03:1f.0:   IO window: disabled
[    0.864095] pci 0001:03:1f.0:   MEM window: disabled
[    0.869019] pci 0001:03:1f.0:   PREFETCH window: disabled
[    0.874378] pci 0001:02:00.0: PCI bridge, secondary bus 0001:03
[    0.880250] pci 0001:02:00.0:   IO window: disabled
[    0.885090] pci 0001:02:00.0:   MEM window: disabled
[    0.890014] pci 0001:02:00.0:   PREFETCH window: disabled
[    0.895373] pci 0001:01:00.0: PCI bridge, secondary bus 0001:02
[    0.901245] pci 0001:01:00.0:   IO window: disabled
[    0.906084] pci 0001:01:00.0:   MEM window: disabled
[    0.911009] pci 0001:01:00.0:   PREFETCH window: disabled


and after boot:

$ lspci
0000:00:00.0 Power PC: Freescale Semiconductor Inc Unknown device 00c6  
(rev 10)
0001:01:00.0 PCI bridge: Freescale Semiconductor Inc Unknown device  
00c6 (rev 10)
0001:02:00.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:00.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:01.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:02.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:03.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:04.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:05.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:06.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:07.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:08.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:09.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:0a.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:0b.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:0c.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:0d.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:0e.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:0f.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:10.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:11.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:12.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:13.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:14.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:15.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:16.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:17.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:18.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:19.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:1a.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:1b.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:1c.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:1d.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:1e.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)
0001:03:1f.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200 PCI  
Express-to-PCI Bridge (rev 03)

$ ls /sys/devices/pci0002:24
pci_bus:0002:24  power            uevent

$ ls -l /sys/devices/pci0002:24/pci_bus:0002:24/
-r--r--r--    1 root     root         4096 Jan 20 20:52 cpuaffinity
lrwxrwxrwx    1 root     root            0 Jan 20 20:52 device - 
 > ../../../devices/pci0002:24
-rw-------    1 root     root        65535 Jan 20 20:52 legacy_io
-rw-------    1 root     root      1048576 Jan 20 20:52 legacy_mem
drwxr-xr-x    2 root     root            0 Jan 20 20:52 power
lrwxrwxrwx    1 root     root            0 Jan 20 20:52 subsystem - 
 > ../../pci_bus
-rw-r--r--    1 root     root         4096 Jan 20 20:52 uevent

So it seems like the XIO2000(A) is being misconfigured or  
misidentified, and rather than finding the configured bus behind the  
bridge, it is doing "something else", and as a result, not finding the  
PCI OHCI FireWire controller on the PCI side of the bridge.

Unfortunately I have no real idea where to start looking at this...

Any ideas? Or is there a better place to be posting about this?

TIA,

B.J. Buchalter

On Aug 11, 2009, at 5:27 PM, B.J. Buchalter wrote:

So it seems like the XIO2000(A) is being misconfigured or  
misidentified, and rather than finding the configured bus behind the  
bridge, it is doing "something else", and as a result, not finding  
the PCI OHCI FireWire controller on the PCI side of the bridge.

Unfortunately I have no real idea where to start looking at this...

Any ideas? Or is there a better place to be posting about this?

This is a reasonable place to post this.  Can you see what u-boot  
reports for its PCI/e bus scan?

- k

On Aug 11, 2009, at 5:27 PM, B.J. Buchalter wrote:

I have been trying to use a PCIe FireWire card on a MPC8377E-RDB  
board.

is this an off the shelf PCIe FireWire card?  If so which one?

- k

On Aug 11, 2009, at 9:43 PM, Kumar Gala wrote:

On Aug 11, 2009, at 5:27 PM, B.J. Buchalter wrote:

quoted

So it seems like the XIO2000(A) is being misconfigured or  
misidentified, and rather than finding the configured bus behind  
the bridge, it is doing "something else", and as a result, not  
finding the PCI OHCI FireWire controller on the PCI side of the  
bridge.

Unfortunately I have no real idea where to start looking at this...

Any ideas? Or is there a better place to be posting about this?

This is a reasonable place to post this.  Can you see what u-boot  
reports for its PCI/e bus scan?

Thanks,

This is what u-boot says:

U-Boot 1.3.3 (Jun 19 2008 - 10:47:48) MPC83XX

Reset Status: Software Hard, External/Internal Soft, External/Internal  
Hard

CPU:   e300c4, MPC8377E, Rev: 1.0 at 666.666 MHz, CSB: 333.333 MHz
Board: Freescale MPC837xERDB
I2C:   ready
DRAM:  256 MB
PCIE0: Link
PCIE1: No link
FLASH:  8 MB
NAND:  32 MiB
In:    serial
Out:   serial
Err:   serial
Net:   TSEC0, TSEC1
eSDHC: No SD/MMC card found
SATA:  SATA0 (No RDY)
        SATA1 (No RDY)
Hit any key to stop autoboot:  0
=> set serverip 10.0.1.40
=> run tftpnfsboot


If there is additional information to be found, I'd be happy to  
collect it.

Best regards,

B.J. Buchalter
	

On Aug 11, 2009, at 9:43 PM, Kumar Gala wrote:

On Aug 11, 2009, at 5:27 PM, B.J. Buchalter wrote:

quoted

I have been trying to use a PCIe FireWire card on a MPC8377E-RDB  
board.

is this an off the shelf PCIe FireWire card?

Yes.

If so which one?

I don't know the model of the board off the top of my head.

I do know that it uses the Texas Instruments XIO2000A/XIO2200 PCI  
Express-to-PCI Bridge (rev 03), with the TSB82AA2 OHCI Link behind the  
bridge.

The same board definitely works as expected in a Mac Pro.

In doing some Google searches about this, I have seen the TI part  
listed in the PCI configuration of folks running linux (though  
probably on Intel) and apparently having no problems with the busses  
behind the bridge being enumerated.

I am guessing that the problem is related the the PCIe root complex on  
the 8377, but I am just guessing.

Is PCIe known to work on the MPC837x?

Thanks!

B.J. Buchalter

On Aug 11, 2009, at 10:25 PM, B.J. Buchalter wrote:

I don't know the model of the board off the top of my head.

I do know that it uses the Texas Instruments XIO2000A/XIO2200 PCI  
Express-to-PCI Bridge (rev 03), with the TSB82AA2 OHCI Link behind  
the bridge.

The same board definitely works as expected in a Mac Pro.

In doing some Google searches about this, I have seen the TI part  
listed in the PCI configuration of folks running linux (though  
probably on Intel) and apparently having no problems with the busses  
behind the bridge being enumerated.

I am guessing that the problem is related the the PCIe root complex  
on the 8377, but I am just guessing.

Is PCIe known to work on the MPC837x?

It is suppose to.  I would recommend updating u-boot to something  
newer and see what you get on that side.

Also I'll try see if we have a PCIe board w/a p2p bridge on it.  I'm  
guessing no one has tried PCIe on 83xx w/a p2p bridge on it.

- k

On Aug 12, 2009, at 1:20 AM, Kumar Gala wrote:

On Aug 11, 2009, at 10:25 PM, B.J. Buchalter wrote:

quoted

I don't know the model of the board off the top of my head.

I do know that it uses the Texas Instruments XIO2000A/XIO2200 PCI  
Express-to-PCI Bridge (rev 03), with the TSB82AA2 OHCI Link behind  
the bridge.

The same board definitely works as expected in a Mac Pro.

In doing some Google searches about this, I have seen the TI part  
listed in the PCI configuration of folks running linux (though  
probably on Intel) and apparently having no problems with the  
busses behind the bridge being enumerated.

I am guessing that the problem is related the the PCIe root complex  
on the 8377, but I am just guessing.

Is PCIe known to work on the MPC837x?

It is suppose to.  I would recommend updating u-boot to something  
newer and see what you get on that side.

Ok -- I can try that; I have been using the u-boot that shipped with  
the board to avoid having to worry about wiping out the boot-load  
accidently.

Also I'll try see if we have a PCIe board w/a p2p bridge on it.  I'm  
guessing no one has tried PCIe on 83xx w/a p2p bridge on it.

I see. A lot of the FireWire parts are based upon p2p bridges...

Thanks!

B.J. Buchalter
	

On Tue, 2009-08-11 at 23:25 -0400, B.J. Buchalter wrote:

I don't know the model of the board off the top of my head.

I do know that it uses the Texas Instruments XIO2000A/XIO2200 PCI  
Express-to-PCI Bridge (rev 03), with the TSB82AA2 OHCI Link behind the  
bridge.

The same board definitely works as expected in a Mac Pro.

I've had problems on embedded 4xx with some of those guys. I think
there's a problem with the TI bridge, either it needs more time to
settle after reset or it doesn't cope with a second reset by the kernel
after the FW reset ,I don't remember... but there's definitely something
fishy with that bridge or something a bit too "tight" on spec we do on
both FSL and 44x that doesn't please that bridge.

Cheers,
Ben.

In doing some Google searches about this, I have seen the TI part  
listed in the PCI configuration of folks running linux (though  
probably on Intel) and apparently having no problems with the busses  
behind the bridge being enumerated.

I am guessing that the problem is related the the PCIe root complex on  
the 8377, but I am just guessing.

Is PCIe known to work on the MPC837x?

Thanks!

B.J. Buchalter


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On Wed, 2009-08-12 at 00:20 -0500, Kumar Gala wrote:

It is suppose to.  I would recommend updating u-boot to something  
newer and see what you get on that side.

Also I'll try see if we have a PCIe board w/a p2p bridge on it.  I'm  
guessing no one has tried PCIe on 83xx w/a p2p bridge on it.

A few off-the-shelves FW + USB2 PCIe cards have that bridge and have
shown weird issues, might be worth shopping at your local Fry's :-)

Cheers,
Ben.