mx25pdk: Align the environment with other FSL boards

Allow the boot of a device tree mainline kernel by aligning the environment
variables with other FSL boards.

Tested NFS boot of a dt 3.14-rc5 kernel.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Acked-by: NOtavio Salvador <otavio@ossystems.com.br>
Acked-by: NStefano Babic <sbabic@denx.de>

include/configs/mx25pdk.h

@@ -62,6 +62,7 @@
 /* No NOR flash present */
 #define CONFIG_ENV_OFFSET      (6 * 64 * 1024)
 #define CONFIG_ENV_SIZE        (8 * 1024)
+#define CONFIG_SYS_MMC_ENV_DEV		0
 
 #define CONFIG_SYS_NO_FLASH
 #define CONFIG_ENV_IS_IN_MMC
@@ -69,7 +70,7 @@
 
 /* U-Boot general configuration */
 #define CONFIG_AUTO_COMPLETE
-#define CONFIG_SYS_CBSIZE	256	/* Console I/O Buffer Size  */
+#define CONFIG_SYS_CBSIZE	1024	/* Console I/O Buffer Size  */
 /* Print buffer sz */
 #define CONFIG_SYS_PBSIZE	(CONFIG_SYS_CBSIZE + \
 		sizeof(CONFIG_SYS_PROMPT) + 16)
@@ -132,12 +133,104 @@
 #define CONFIG_LOADADDR		0x81000000	/* loadaddr env var */
 #define CONFIG_SYS_LOAD_ADDR	CONFIG_LOADADDR
 
+#define CONFIG_DEFAULT_FDT_FILE		"imx25-pdk.dtb"
+
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"script=boot.scr\0" \
-	"uimage=uImage\0" \
-	"netargs=setenv bootargs console=ttymxc0,${baudrate} " \
+	"image=zImage\0" \
+	"console=ttymxc0\0" \
+	"splashpos=m,m\0" \
+	"fdt_high=0xffffffff\0" \
+	"initrd_high=0xffffffff\0" \
+	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
+	"fdt_addr=0x82000000\0" \
+	"boot_fdt=try\0" \
+	"ip_dyn=yes\0" \
+	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
+	"mmcpart=1\0" \
+	"mmcroot=/dev/mmcblk0p2 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" \
+	"loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}\0" \
+	"loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0" \
+	"mmcboot=echo Booting from mmc ...; " \
+		"run mmcargs; " \
+		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+			"if run loadfdt; then " \
+				"bootz ${loadaddr} - ${fdt_addr}; " \
+			"else " \
+				"if test ${boot_fdt} = try; then " \
+					"bootz; " \
+				"else " \
+					"echo WARN: Cannot load the DT; " \
+				"fi; " \
+			"fi; " \
+		"else " \
+			"bootz; " \
+		"fi;\0" \
+	"netargs=setenv bootargs console=${console},${baudrate} " \
 		"root=/dev/nfs " \
-		"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
-	"bootcmd=run netargs; dhcp ${uimage}; bootm\0" \
+	"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
+		"netboot=echo Booting from net ...; " \
+		"run netargs; " \
+		"if test ${ip_dyn} = yes; then " \
+			"setenv get_cmd dhcp; " \
+		"else " \
+			"setenv get_cmd tftp; " \
+		"fi; " \
+		"${get_cmd} ${image}; " \
+		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+			"if ${get_cmd} ${fdt_addr} ${fdt_file}; then " \
+				"bootz ${loadaddr} - ${fdt_addr}; " \
+			"else " \
+				"if test ${boot_fdt} = try; then " \
+					"bootz; " \
+				"else " \
+					"echo WARN: Cannot load the DT; " \
+				"fi; " \
+			"fi; " \
+		"else " \
+			"bootz; " \
+		"fi;\0"
+
+#define CONFIG_BOOTCOMMAND \
+	   "mmc dev ${mmcdev}; if mmc rescan; then " \
+		   "if run loadbootscript; then " \
+			   "run bootscript; " \
+		   "else " \
+			   "if run loadimage; then " \
+				   "run mmcboot; " \
+			   "else run netboot; " \
+			   "fi; " \
+		   "fi; " \
+	   "else run netboot; fi"
+
+/* Miscellaneous configurable options */
+#define CONFIG_SYS_LONGHELP
+#define CONFIG_SYS_HUSH_PARSER
+#define CONFIG_AUTO_COMPLETE
+
+/* Print Buffer Size */
+#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
+#define CONFIG_SYS_MAXARGS	       16
+#define CONFIG_SYS_BARGSIZE CONFIG_SYS_CBSIZE
 
 #endif /* __CONFIG_H */