omap3_beagle: enable the use of a plain text file

Using the new env import command it is possible to use plain text files instead
of script-images. Plain text files are much easier to handle.

E.g. If your boot.scr contains the following:
-----------------------------------
setenv dvimode 1024x768-16@60
run loaduimage
run mmcboot
-----------------------------------
you could create a file named uEnv.txt and use that instead of boot.scr:
-----------------------------------
dvimode=1024x768-16@60
uenvcmd=run loaduimage; run mmcboot
-----------------------------------
The variable uenvcmd (if existent) will be executed (using run) after uEnv.txt
was loaded. If uenvcmd doesn't exist the default boot sequence will be started,
therefore you could just use
-----------------------------------
dvimode=1024x768-16@60
-----------------------------------
as uEnv.txt because loaduimage and mmcboot is part of the default boot sequence

Signed-off-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h
index c064ae7e87115ba5e4da76cd9f44afa887b585b2..bfde910f04a6157dbaadd20fe020fe7d863a9191 100644 (file)
--- a/include/configs/omap3_beagle.h
+++ b/include/configs/omap3_beagle.h
@@ -228,9 +228,9 @@
                "omapdss.def_disp=${defaultdisplay} " \
                "root=${nandroot} " \
                "rootfstype=${nandrootfstype}\0" \
-       "loadbootscript=fatload mmc ${mmcdev} ${loadaddr} boot.scr\0" \
-       "bootscript=echo Running bootscript from mmc ...; " \
-               "source ${loadaddr}\0" \
+       "loadbootenv=fatload mmc ${mmcdev} ${loadaddr} uEnv.txt\0" \
+       "importbootenv=echo Importing environment from mmc ...; " \
+               "env import -t $loadaddr $filesize\0" \
        "loaduimage=fatload mmc ${mmcdev} ${loadaddr} uImage\0" \
        "mmcboot=echo Booting from mmc ...; " \
                "run mmcargs; " \
@@ -242,15 +242,19 @@
 
 #define CONFIG_BOOTCOMMAND \
        "if mmc rescan ${mmcdev}; then " \
-               "if run loadbootscript; then " \
-                       "run bootscript; " \
-               "else " \
-                       "if run loaduimage; then " \
-                               "run mmcboot; " \
-                       "else run nandboot; " \
-                       "fi; " \
-               "fi; " \
-       "else run nandboot; fi"
+               "echo SD/MMC found on device ${mmcdev};" \
+               "if run loadbootenv; then " \
+                       "run importbootenv;" \
+               "fi;" \
+               "if test -n $uenvcmd; then " \
+                       "echo Running uenvcmd ...;" \
+                       "run uenvcmd;" \
+               "fi;" \
+               "if run loaduimage; then " \
+                       "run mmcboot;" \
+               "fi;" \
+       "fi;" \
+       "run nandboot;" \
 
 #define CONFIG_AUTO_COMPLETE           1
 /*