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| author | Grzegorz Bernacki <gjb@semihalf.com> | 2007-09-07 18:35:37 +0200 |
|---|---|---|
| committer | Rafal Jaworowski <raj@semihalf.com> | 2007-09-07 18:35:37 +0200 |
| commit | 6efc1fc0b63e55f94c5bc61d8dd23c918e3bc778 (patch) | |
| tree | 460ef1c2867ad29a0d68c3149d910e6ab351bec5 /board/amcc/yucca/yucca.c | |
| parent | 7f1913938984ef6c6a46cb53e003719196d9c5de (diff) | |
| download | blackbird-obmc-uboot-6efc1fc0b63e55f94c5bc61d8dd23c918e3bc778.tar.gz blackbird-obmc-uboot-6efc1fc0b63e55f94c5bc61d8dd23c918e3bc778.zip | |
[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 <gjb@semihalf.com>
Diffstat (limited to 'board/amcc/yucca/yucca.c')
| -rw-r--r-- | board/amcc/yucca/yucca.c | 12 |
1 files changed, 12 insertions, 0 deletions
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 */ |
