TQM85xx: Support for Flat Device Tree

This patch adds support for Linux kernels using the Flat Device Tree.
It also re-defines the default environment settings for booting Linux
with the FDT blob.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>

Makefile

@@ -2238,8 +2238,7 @@ TQM8560_config:		unconfig
 	echo "#define CONFIG_MPC$${CTYPE}">>$(obj)include/config.h; \
 	echo "#define CONFIG_TQM$${CTYPE}">>$(obj)include/config.h; \
 	echo "#define CONFIG_HOSTNAME tqm$${CTYPE}">>$(obj)include/config.h; \
-	echo "#define CONFIG_BOARDNAME \"TQM$${CTYPE}\"">>$(obj)include/config.h; \
-	echo "#define CFG_BOOTFILE_PATH \"/tftpboot/tqm$${CTYPE}/uImage\"">>$(obj)include/config.h
+	echo "#define CONFIG_BOARDNAME \"TQM$${CTYPE}\"">>$(obj)include/config.h;
 	@$(MKCONFIG) -a TQM85xx ppc mpc85xx tqm85xx tqc
 
 #########################################################################

board/tqc/tqm85xx/tqm85xx.c

@@ -34,6 +34,8 @@
 #include <asm/io.h>
 #include <ioports.h>
 #include <flash.h>
+#include <libfdt.h>
+#include <fdt_support.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -479,6 +481,28 @@ void pci_init_board (void)
 #endif /* CONFIG_PCI */
 }
 
+#if defined(CONFIG_OF_BOARD_SETUP)
+void ft_board_setup (void *blob, bd_t *bd)
+{
+	int node, tmp[2];
+	const char *path;
+
+	ft_cpu_setup (blob, bd);
+
+	node = fdt_path_offset (blob, "/aliases");
+	tmp[0] = 0;
+	if (node >= 0) {
+#ifdef CONFIG_PCI
+		path = fdt_getprop (blob, node, "pci0", NULL);
+		if (path) {
+			tmp[1] = hose.last_busno - hose.first_busno;
+			do_fixup_by_path (blob, path, "bus-range", &tmp, 8, 1);
+		}
+#endif
+	}
+}
+#endif
+
 #ifdef CONFIG_BOARD_EARLY_INIT_R
 int board_early_init_r (void)
 {

include/configs/TQM85xx.h

@@ -201,6 +201,11 @@
 #define	CFG_PROMPT_HUSH_PS2	"> "
 #endif
 
+/* pass open firmware flat tree */
+#define CONFIG_OF_LIBFDT		1
+#define CONFIG_OF_BOARD_SETUP		1
+#define CONFIG_OF_STDOUT_VIA_ALIAS	1
+
 /* CAN */
 #ifdef CONFIG_CAN_DRIVER
 #define CFG_CAN_BASE		0xE3000000	/* CAN base address     */
@@ -463,10 +468,26 @@
 
 #undef	CONFIG_BOOTARGS		/* the boot command will set bootargs	*/
 
+
+/*
+ * Setup some board specific values for the default environment variables
+ */
+#ifdef CONFIG_CPM2
+#define CFG_ENV_CONSDEV		"consdev=ttyCPM0\0"
+#else
+#define CFG_ENV_CONSDEV		"consdev=ttyS0\0"
+#endif
+#define CFG_ENV_FDT_FILE	"fdt_file="MK_STR(CONFIG_HOSTNAME)"/" \
+				MK_STR(CONFIG_HOSTNAME)".dtb\0"
+#define CFG_ENV_BOOTFILE	"bootfile="MK_STR(CONFIG_HOSTNAME)"/uImage\0"
+#define CFG_ENV_UBOOT		"uboot="MK_STR(CONFIG_HOSTNAME)"/u-boot.bin\0" \
+				"uboot_addr="MK_STR(TEXT_BASE)"\0"
+
 #define	CONFIG_EXTRA_ENV_SETTINGS					\
-	"bootfile="CFG_BOOTFILE_PATH"\0"				\
+	CFG_ENV_BOOTFILE						\
+	CFG_ENV_FDT_FILE						\
+	CFG_ENV_CONSDEV							\
 	"netdev=eth0\0"							\
-	"consdev=ttyS0\0"						\
 	"nfsargs=setenv bootargs root=/dev/nfs rw "			\
 		"nfsroot=$serverip:$rootpath\0"				\
 	"ramargs=setenv bootargs root=/dev/ram rw\0"			\
@@ -476,17 +497,24 @@
 	"addcons=setenv bootargs $bootargs "				\
 		"console=$consdev,$baudrate\0"				\
 	"flash_nfs=run nfsargs addip addcons;"				\
-		"bootm $kernel_addr\0"					\
+		"bootm $kernel_addr - $fdt_addr\0"			\
 	"flash_self=run ramargs addip addcons;"				\
-		"bootm $kernel_addr $ramdisk_addr\0"			\
-	"net_nfs=tftp $loadaddr $bootfile;"				\
-		"run nfsargs addip addcons;bootm\0"			\
+		"bootm $kernel_addr $ramdisk_addr $fdt_addr\0"		\
+	"net_nfs=tftp $kernel_addr_r $bootfile;"       			\
+		"tftp $fdt_addr_r $fdt_file;"				\
+		"run nfsargs addip addcons;"				\
+		"bootm $kernel_addr_r - $fdt_addr_r\0"    		\
 	"rootpath=/opt/eldk/ppc_85xx\0"					\
-	"kernel_addr=FE000000\0"					\
-	"ramdisk_addr=FE180000\0"					\
-	"load=tftp 100000 /tftpboot/$hostname/u-boot.bin\0"		\
-	"update=protect off fffc0000 ffffffff;era fffc0000 ffffffff;"	\
-		"cp.b 100000 fffc0000 40000;"				\
+	"fdt_addr_r=900000\0"						\
+	"kernel_addr_r=1000000\0"      					\
+	"fdt_addr=ffec0000\0"						\
+	"kernel_addr=ffd00000\0"					\
+	"ramdisk_addr=ff800000\0"					\
+	CFG_ENV_UBOOT							\
+	"load=tftp 100000 $uboot\0"					\
+	"update=protect off $uboot_addr +$filesize;"			\
+		"erase $uboot_addr +$filesize;"				\
+		"cp.b 100000 $uboot_addr $filesize;"			\
 		"setenv filesize;saveenv\0"				\
 	"upd=run load update\0"						\
 	""