From: SWARTHOU@freescale.com To: fhpworks@hotmail.com CC: u-boot@lists.denx.de Subject: RE: [U-Boot] Problem with PCI Express connecting 2 MPC8544 Date: Mon, 25 Jul 2011 22:49:18 +0000
From: sardamaxima
In the first processor (configured as RC) I get the following
...
...PCIE LTSSM=0x16, Negotiated link width=1
Good.
Scanning PCI bus 01 PCIE1 on bus 00 - 01...
In the second processor (configured as EP) I get the following output: " ... pci_init_board: devdisr=7000008, io_sel=2, host_agent=5
PCIE1 connected to Slot2 as End Point (base address e000a000) Scanning PCI bus 00 PCI Scan: Found Bus 0, Device 1, Function 0 00 01 1957 0033 0b20 00 ... " Here i am using an old version of u-boot (1.3.0-rc3).
Since this is an old u-boot, it might not be setting CFG_READY. If this is not set, the end point won't be seen.
Check PEX_CFG_READY with: "pci d 0.0 4b0 1"
-Ed
Hi Ed Thanks a lot for the advice. That register had the "ready bit" =0. It is working now and i see the device in /proc/bus/pci/...(@kernel)
Thanks for the help
Hugo