[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>

4 files changed, 28 insertions, 2 deletions

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 @@ 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
 		 */
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 @@ 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
 		 */
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    */