From 6efc1fc0b63e55f94c5bc61d8dd23c918e3bc778 Mon Sep 17 00:00:00 2001 From: Grzegorz Bernacki Date: Fri, 7 Sep 2007 18:35:37 +0200 Subject: [PPC440SPe] PCIe environment settings for Katmai and Yucca - 'pciconfighost' is set by default in order to be able to scan bridges behind the primary host/PCIe - 'pciscandelay' env variable is recognized to allow for user-controlled delay before the PCIe bus enumeration; some peripheral devices require a significant delay before they can be scanned (e.g. LSI8408E); without the delay they are not detected Signed-off-by: Grzegorz Bernacki --- board/amcc/yucca/yucca.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'board/amcc/yucca') diff --git a/board/amcc/yucca/yucca.c b/board/amcc/yucca/yucca.c index 252e4fe07a..397b01873f 100644 --- a/board/amcc/yucca/yucca.c +++ b/board/amcc/yucca/yucca.c @@ -850,6 +850,8 @@ void pcie_setup_hoses(int busno) { struct pci_controller *hose; int i, bus; + char *env; + unsigned int delay; /* * assume we're called after the PCIX hose is initialized, which takes @@ -895,6 +897,16 @@ void pcie_setup_hoses(int busno) */ #else ppc440spe_setup_pcie_rootpoint(hose, i); + + env = getenv ("pciscandelay"); + if (env != NULL) { + delay = simple_strtoul (env, NULL, 10); + if (delay > 5) + printf ("Warning, expect noticable delay before PCIe" + "scan due to 'pciscandelay' value!\n"); + mdelay (delay * 1000); + } + /* * Config access can only go down stream */ -- cgit v1.2.1