From 547e31d2f4b777ff5647691c4d5e8197cb55149b Mon Sep 17 00:00:00 2001
From: Otavio Salvador <otavio@ossystems.com.br>
Date: Wed, 24 Apr 2013 11:23:28 +0000
Subject: [PATCH] mx53ard: Rework default environment to support FDT, MMC and
 netboot

This reworks the environment settings to be aligned with the other
i.MX boards. The loadaddr has been changed to allow the Freescale
kernel and mainline kernel to work without environment changes.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Acked-by: Fabio Estevam <fabio.estevam@freescale.com>
---
 include/configs/mx53ard.h | 101 +++++++++++++++++++++++++++++---------
 1 file changed, 78 insertions(+), 23 deletions(-)

diff --git a/include/configs/mx53ard.h b/include/configs/mx53ard.h
index 296cae3ed0..41974b1262 100644
--- a/include/configs/mx53ard.h
+++ b/include/configs/mx53ard.h
@@ -91,6 +91,7 @@
 #include <config_cmd_default.h>
 
 #undef CONFIG_CMD_IMLS
+#define CONFIG_CMD_SETEXPR
 
 #define CONFIG_BOOTDELAY	3
 
@@ -101,45 +102,98 @@
 #define CONFIG_SMC911X_16_BIT
 #define CONFIG_SMC911X_BASE CS1_BASE_ADDR
 
-#define CONFIG_LOADADDR		0x70800000	/* loadaddr env var */
+#define CONFIG_LOADADDR		0x72000000	/* loadaddr env var */
 #define CONFIG_SYS_TEXT_BASE    0x77800000
 
+#define CONFIG_DEFAULT_FDT_FILE		"imx53-ard.dtb"
+
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"script=boot.scr\0" \
 	"uimage=uImage\0" \
-	"mmcdev=0\0" \
-	"mmcpart=2\0" \
-	"mmcroot=/dev/mmcblk0p3 rw\0" \
-	"mmcrootfstype=ext3 rootwait\0" \
-	"mmcargs=setenv bootargs console=ttymxc0,${baudrate} " \
-		"root=${mmcroot} " \
-		"rootfstype=${mmcrootfstype}\0" \
+	"console=ttymxc0\0" \
+	"fdt_high=0xffffffff\0" \
+	"initrd_high=0xffffffff\0" \
+	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
+	"fdt_addr=0x71000000\0" \
+	"boot_fdt=try\0" \
+	"ip_dyn=yes\0" \
+	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
+	"mmcpart=" __stringify(CONFIG_SYS_MMC_ENV_PART) "\0" \
+	"mmcroot=/dev/mmcblk0p3 rootwait rw\0" \
+	"update_sd_firmware_filename=u-boot.imx\0" \
+	"update_sd_firmware=" \
+		"if test ${ip_dyn} = yes; then " \
+			"setenv get_cmd dhcp; " \
+		"else " \
+			"setenv get_cmd tftp; " \
+		"fi; " \
+		"if mmc dev ${mmcdev}; then "	\
+			"if ${get_cmd} ${update_sd_firmware_filename}; then " \
+				"setexpr fw_sz ${filesize} / 0x200; " \
+				"setexpr fw_sz ${fw_sz} + 1; "	\
+				"mmc write ${loadaddr} 0x2 ${fw_sz}; " \
+			"fi; "	\
+		"fi\0" \
+	"mmcargs=setenv bootargs console=${console},${baudrate} " \
+		"root=${mmcroot}\0" \
 	"loadbootscript=" \
 		"fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
 	"bootscript=echo Running bootscript from mmc ...; " \
 		"source\0" \
 	"loaduimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${uimage}\0" \
+	"loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0" \
 	"mmcboot=echo Booting from mmc ...; " \
 		"run mmcargs; " \
-		"bootm\0" \
-	"netargs=setenv bootargs console=ttymxc0,${baudrate} " \
+		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+			"if run loadfdt; then " \
+				"bootm ${loadaddr} - ${fdt_addr}; " \
+			"else " \
+				"if test ${boot_fdt} = try; then " \
+					"bootm; " \
+				"else " \
+					"echo WARN: Cannot load the DT; " \
+				"fi; " \
+			"fi; " \
+		"else " \
+			"bootm; " \
+		"fi;\0" \
+	"netargs=setenv bootargs console=${console},${baudrate} " \
 		"root=/dev/nfs " \
-		"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
-	"netboot=echo Booting from net ...; " \
+	"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
+		"netboot=echo Booting from net ...; " \
 		"run netargs; " \
-		"dhcp ${uimage}; bootm\0" \
-
-#define CONFIG_BOOTCOMMAND \
-	"mmc dev ${mmcdev}; if mmc rescan; then " \
-		"if run loadbootscript; then " \
-			"run bootscript; " \
+		"if test ${ip_dyn} = yes; then " \
+			"setenv get_cmd dhcp; " \
 		"else " \
-			"if run loaduimage; then " \
-				"run mmcboot; " \
-			"else run netboot; " \
-			"fi; " \
+			"setenv get_cmd tftp; " \
 		"fi; " \
-	"else run netboot; fi"
+		"${get_cmd} ${uimage}; " \
+		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+			"if ${get_cmd} ${fdt_addr} ${fdt_file}; then " \
+				"bootm ${loadaddr} - ${fdt_addr}; " \
+			"else " \
+				"if test ${boot_fdt} = try; then " \
+					"bootm; " \
+				"else " \
+					"echo WARN: Cannot load the DT; " \
+				"fi; " \
+			"fi; " \
+		"else " \
+			"bootm; " \
+		"fi;\0"
+
+#define CONFIG_BOOTCOMMAND \
+	   "mmc dev ${mmcdev}; if mmc rescan; then " \
+		   "if run loadbootscript; then " \
+			   "run bootscript; " \
+		   "else " \
+			   "if run loaduimage; then " \
+				   "run mmcboot; " \
+			   "else run netboot; " \
+			   "fi; " \
+		   "fi; " \
+	   "else run netboot; fi"
+
 #define CONFIG_ARP_TIMEOUT	200UL
 
 /* Miscellaneous configurable options */
@@ -186,6 +240,7 @@
 #define CONFIG_ENV_SIZE        (8 * 1024)
 #define CONFIG_ENV_IS_IN_MMC
 #define CONFIG_SYS_MMC_ENV_DEV	0
+#define CONFIG_SYS_MMC_ENV_PART	2
 
 #define CONFIG_OF_LIBFDT
 
-- 
2.25.1