arm: am43xx: Add USB spl boot support

Add the USB host boot support for the am43xx evm
Add the macros to boot from a usb drive in uBoot

Signed-off-by: Dan Murphy <dmurphy@ti.com>

diff --git a/include/configs/am43xx_evm.h b/include/configs/am43xx_evm.h
index 4de495a15a253463a119b4fcdfec1033850c2f4e..f45deeb351c64a217aecced9a81ed6acb10a297e 100644 (file)
--- a/include/configs/am43xx_evm.h
+++ b/include/configs/am43xx_evm.h
@@ -69,6 +69,11 @@
 
 #define CONFIG_SPL_LDSCRIPT            "$(CPUDIR)/omap-common/u-boot-spl.lds"
 
+/* SPL USB Support */
+#define CONFIG_SPL_USB_SUPPORT
+#define CONFIG_SPL_USB_HOST_SUPPORT
+#define CONFIG_SYS_USB_FAT_BOOT_PARTITION              1
+
 #define CONFIG_CMD_USB
 #define CONFIG_USB_HOST
 #define CONFIG_USB_XHCI
@@ -94,26 +99,34 @@
        "mmcdev=0\0" \
        "mmcroot=/dev/mmcblk0p2 rw\0" \
        "mmcrootfstype=ext4 rootwait\0" \
+       "usbroot=/dev/sda2 rw\0" \
+       "usbrootfstype=ext4 rootwait\0" \
+       "usbdev=0\0" \
        "ramroot=/dev/ram0 rw ramdisk_size=65536 initrd=${rdaddr},64M\0" \
        "ramrootfstype=ext2\0" \
        "mmcargs=setenv bootargs console=${console} " \
                "${optargs} " \
                "root=${mmcroot} " \
                "rootfstype=${mmcrootfstype}\0" \
+       "usbargs=setenv bootargs console=${console} " \
+               "${optargs} " \
+               "root=${usbroot} " \
+               "rootfstype=${usbrootfstype}\0" \
        "bootenv=uEnv.txt\0" \
-       "loadbootenv=load mmc ${mmcdev} ${loadaddr} ${bootenv}\0" \
+       "loadbootenv=load ${devtype} ${devnum} ${loadaddr} ${bootenv}\0" \
        "importbootenv=echo Importing environment from mmc ...; " \
                "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" \
-       "loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}\0" \
+       "loadramdisk=load ${devtype} ${devnum} ${rdaddr} ramdisk.gz\0" \
+       "loadimage=load ${devtype} ${bootpart} ${loadaddr} ${bootdir}/${bootfile}\0" \
+       "loadfdt=load ${devtype} ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}\0" \
        "mmcboot=mmc dev ${mmcdev}; " \
+               "setenv devnum ${mmcdev}; " \
                "if mmc rescan; then " \
-                       "echo SD/MMC found on device ${mmcdev};" \
+                       "echo SD/MMC found on device ${devnum};" \
                        "if run loadbootenv; then " \
                                "echo Loaded environment from ${bootenv};" \
                                "run importbootenv;" \
@@ -129,6 +142,26 @@
                                "bootz ${loadaddr} - ${fdtaddr}; " \
                        "fi;" \
                "fi;\0" \
+       "usbboot=" \
+               "setenv devnum ${usbdev}; " \
+               "setenv devtype usb; " \
+               "usb start ${usbdev}; " \
+               "if usb dev ${usbdev}; then " \
+                       "if run loadbootenv; then " \
+                               "echo Loaded environment from ${bootenv};" \
+                               "run importbootenv;" \
+                       "fi;" \
+                       "if test -n $uenvcmd; then " \
+                               "echo Running uenvcmd ...;" \
+                               "run uenvcmd;" \
+                       "fi;" \
+                       "if run loadimage; then " \
+                               "run loadfdt; " \
+                               "echo Booting from usb ${usbdev}...; " \
+                               "run usbargs;" \
+                               "bootz ${loadaddr} - ${fdtaddr}; " \
+                       "fi;" \
+               "fi\0" \
        "findfdt="\
                "if test $board_name = AM43EPOS; then " \
                        "setenv fdtfile am43x-epos-evm.dtb; fi; " \
@@ -139,7 +172,8 @@
 
 #define CONFIG_BOOTCOMMAND \
        "run findfdt; " \
-       "run mmcboot;"
+       "run mmcboot;" \
+       "run usbboot;"
 
 #endif
 #endif /* __CONFIG_AM43XX_EVM_H */