[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>
diff --git a/board/amcc/katmai/katmai.c b/board/amcc/katmai/katmai.c
index a9ae4a3..afd60ec 100644
--- a/board/amcc/katmai/katmai.c
+++ b/board/amcc/katmai/katmai.c
@@ -396,6 +396,8 @@
{
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 @@
*/
#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
*/
diff --git a/board/amcc/yucca/yucca.c b/board/amcc/yucca/yucca.c
index 252e4fe..397b018 100644
--- a/board/amcc/yucca/yucca.c
+++ b/board/amcc/yucca/yucca.c
@@ -850,6 +850,8 @@
{
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 @@
*/
#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
*/
diff --git a/include/configs/katmai.h b/include/configs/katmai.h
index 7834e39..7908e5a 100644
--- a/include/configs/katmai.h
+++ b/include/configs/katmai.h
@@ -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 */
diff --git a/include/configs/yucca.h b/include/configs/yucca.h
index 323535a..74033b4 100644
--- a/include/configs/yucca.h
+++ b/include/configs/yucca.h
@@ -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 */