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[PPC440SPe] PCIe environment settings for Katmai and Yucca

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- '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>
This commit is contained in:
Grzegorz Bernacki 2007-09-07 18:35:37 +02:00 committed by Rafal Jaworowski
parent 7f19139389
commit 6efc1fc0b6
4 changed files with 28 additions and 2 deletions
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12
board/amcc/katmai/katmai.c
View file

@ -396,6 +396,8 @@ 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
@ -439,6 +441,16 @@ 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
*/

12
board/amcc/yucca/yucca.c
View file

@ -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
*/

3
include/configs/katmai.h
View file

@ -201,6 +201,7 @@
"setenv filesize;saveenv\0" \
"upd=run load;run update\0" \
"kozio=bootm ffc60000\0" \
"pciconfighost=1\0" \
""
#define CONFIG_BOOTCOMMAND "run flash_self"
@ -322,7 +323,7 @@
#define CONFIG_PCI /* include pci support */
#define CONFIG_PCI_PNP 1 /* do pci plug-and-play */
#define CONFIG_PCI_SCAN_SHOW 1 /* show pci devices on startup */
#undef CONFIG_PCI_CONFIG_HOST_BRIDGE
#define CONFIG_PCI_CONFIG_HOST_BRIDGE
/* Board-specific PCI */
#define CFG_PCI_TARGET_INIT /* let board init pci target */

3
include/configs/yucca.h
View file

@ -182,6 +182,7 @@
"cp.b ${fileaddr} FFFB0000 ${filesize};" \
"setenv filesize;saveenv\0" \
"upd=run load;run update\0" \
"pciconfighost=1\0" \
""
#define CONFIG_BOOTCOMMAND "run flash_self"
@ -297,7 +298,7 @@
#define CONFIG_PCI /* include pci support */
#define CONFIG_PCI_PNP 1 /* do pci plug-and-play */
#define CONFIG_PCI_SCAN_SHOW 1 /* show pci devices on startup */
#undef CONFIG_PCI_CONFIG_HOST_BRIDGE
#define CONFIG_PCI_CONFIG_HOST_BRIDGE
/* Board-specific PCI */
#define CFG_PCI_TARGET_INIT /* let board init pci target */