From: Yegor Yefremov yegorslists@googlemail.com
First of all U-Boot would search for a USB mass storage device with either uEnv.txt or kernel-fit.itb and boot.
If USB mass storage device is not available or doesn't provide these files then MMC will be tried.
Signed-off-by: Yegor Yefremov yegorslists@googlemail.com --- include/configs/baltos.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+)
diff --git a/include/configs/baltos.h b/include/configs/baltos.h index 8efd513..06f5ceb 100644 --- a/include/configs/baltos.h +++ b/include/configs/baltos.h @@ -102,7 +102,9 @@ "optargs=\0" \ "mmcdev=0\0" \ "mmcroot=/dev/mmcblk0p2 ro\0" \ + "usbroot=/dev/sda2 ro\0" \ "mmcrootfstype=ext4 rootwait\0" \ + "usbrootfstype=ext4 rootwait\0" \ "rootpath=/export/rootfs\0" \ "nfsopts=nolock\0" \ "static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}" \ @@ -114,6 +116,11 @@ "${mtdparts} " \ "root=${mmcroot} " \ "rootfstype=${mmcrootfstype}\0" \ + "usbargs=setenv bootargs console=${console} " \ + "${optargs} " \ + "${mtdparts} " \ + "root=${usbroot} " \ + "rootfstype=${usbrootfstype}\0" \ "spiroot=/dev/mtdblock4 rw\0" \ "spirootfstype=jffs2\0" \ "spisrcaddr=0xe0000\0" \ @@ -130,15 +137,25 @@ "ip=dhcp\0" \ "bootenv=uEnv.txt\0" \ "loadbootenv=load mmc ${mmcdev} ${loadaddr} ${bootenv}\0" \ + "usbloadbootenv=load usb 0:1 ${loadaddr} ${bootenv}\0" \ "importbootenv=echo Importing environment from mmc ...; " \ "env import -t $loadaddr $filesize\0" \ + "usbimportbootenv=echo Importing environment from USB ...; " \ + "env import -t $loadaddr $filesize\0" \ "ramargs=setenv bootargs console=${console} " \ "${optargs} " \ "root=${ramroot} " \ "rootfstype=${ramrootfstype}\0" \ "loadramdisk=load mmc ${mmcdev} ${rdaddr} ramdisk.gz\0" \ "loadimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}\0" \ + "usbloadimage=load usb 0:1 ${loadaddr} kernel-fit.itb\0" \ "loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}\0" \ + "usbloados=run usbargs; " \ + "bootm ${loadaddr}#conf${board_name}; " \ + "if test $? -ne 0; then " \ + "echo Using default FIT configuration; " \ + "bootm ${loadaddr}; " \ + "fi;\0" \ "mmcloados=run mmcargs; " \ "if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \ "if run loadfdt; then " \ @@ -153,6 +170,21 @@ "else " \ "bootz; " \ "fi;\0" \ + "usbboot=usb reset; " \ + "if usb storage; then " \ + "echo USB drive found;" \ + "if run usbloadbootenv; then " \ + "echo Loaded environment from ${bootenv};" \ + "run usbimportbootenv;" \ + "fi;" \ + "if test -n $uenvcmd; then " \ + "echo Running uenvcmd ...;" \ + "run uenvcmd;" \ + "fi;" \ + "if run usbloadimage; then " \ + "run usbloados;" \ + "fi;" \ + "fi;\0" \ "mmcboot=mmc dev ${mmcdev}; " \ "if mmc rescan; then " \ "echo SD/MMC found on device ${mmcdev};" \ @@ -190,6 +222,7 @@
#define CONFIG_BOOTCOMMAND \ "run findfdt; " \ + "run usbboot;" \ "run mmcboot;" \ "setenv mmcdev 1; " \ "setenv bootpart 1:2; " \