kbs: dfu-boot: Add support for booting with tftp

Add support for booting the board with dfu, tftp and nfs
All the files are sent from the PC with --tftp option

Bootloader using DFU
Kernel and device trees using TFTP
Filesystem using NFS

Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>

diff --git a/k3-bootswitch/dfu-boot.sh b/k3-bootswitch/dfu-boot.sh
index e7e3cba05367050c2b5db465420d72525efbb660..20ecffc8f3cadc258f50c22776c51098fcfa782e 100755 (executable)
--- a/k3-bootswitch/dfu-boot.sh
+++ b/k3-bootswitch/dfu-boot.sh
@@ -14,23 +14,27 @@ usage()
        echo
        echo "dfu-boot.sh => Utility script to select bootmode and mount MMC to PC"
        echo "Usage:"
-       echo "  sudo ./dfu-boot.sh --PLATFORM --mount DEV | --bootmode MODE"
+       echo "  sudo ./dfu-boot.sh --PLATFORM [--mount DEV | --bootmode MODE | --tftp ADDRESS]"
        echo "    PLATFORM: j721e-evm, j7200-evm, am65xx-evm"
        echo "    DEV: specify the device to mount => 1 for MMC, 0 for eMMC"
        echo "    MODE: specify the bootmode to use"
+       echo "    ADDRESS: specify the IP address for tftp/NFS boot"
 }
 
 init() {
 board=$1
        # Customize this as required
        if [ "$board" = "j721e-evm" ]; then
-               uart_dev=/dev/ttyUSB0
+               uart_dev=/dev/ttyUSB12
+               nfspath=$HOME/targetfs/coresdk70
                switch=0
        elif [ "$board" = "j7200-evm" ]; then
-               uart_dev=/dev/ttyUSB6
+               uart_dev=/dev/ttyUSB4
+               nfspath=$HOME/targetfs/coresdk70
                switch=2
        elif [ "$board" = "am65xx-evm" ]; then
-               uart_dev=/dev/ttyUSB12
+               uart_dev=/dev/ttyUSB8
+               nfspath=$HOME/targetfs/coresdk70
                switch=3
        else
                echo "Invalid board"
@@ -124,6 +128,24 @@ bootmode=$1
        fi
 }
 
+# Send commands to do a tftp boot
+tftp_boot() {
+ipaddr=$1
+nfspath=$2
+
+       for i in `seq 1 30`; do
+               echo "" > $uart_dev
+               sleep 0.1
+       done
+
+       cat >>$uart_dev << EOF
+run findfdt
+setenv bootargs 'console=\$console \$optargs root=/dev/nfs rw  nfsroot=$ipaddr:$nfspath,nolock,v3,tcp,rsize=4096,wsize=4096 ip=dhcp sysrq_always_enabled loglevel=8 earlycon=ns16550a,mmio32,0x02800000 '
+setenv bootcmd 'run args_all; setenv autoload no; dhcp; setenv serverip $ipaddr; run findfdt; tftp \${loadaddr} Image; tftp \${fdtaddr} \${name_fdt}; fdt address \${fdtaddr}; fdt resize 0x100000; booti \${loadaddr} - \${fdtaddr}'
+boot
+EOF
+}
+
 # Main script starts from here
 if [ `whoami` != "root" ]; then
        echo "This script should be called with sudo!!"
@@ -146,6 +168,11 @@ case $1 in
                init "am65xx-evm"
                shift
                ;;
+       -t|--tftp)
+               ipaddr=$2
+               shift
+               shift
+               ;;
        -m|--mount)
                mdev=$2
                shift
@@ -169,6 +196,7 @@ esac
 done
 
 init $board
+
 if [ ! -z $bootmode ]; then
        # Reboot the board in specified bootmode
        toggle_power $switch
@@ -179,6 +207,11 @@ elif [ ! -z $mdev ]; then
        toggle_power $switch
        boot_till_uboot >/dev/null
        try_mount $uart_dev $mdev
+elif [ ! -z $ipaddr ]; then
+       # Reboot the board and mount the specified device
+       toggle_power $switch
+       boot_till_uboot >/dev/null
+       tftp_boot $ipaddr $nfspath
 else
        echo "Invalid usage!!"
        usage