common/uboot: Use factory-reset and dev-mode buttons, if available

If the bootloader knows about a factory-reset or dev-mode button, use
them to allow stopping the boot process, and to signal the
factory-reset condition to infix.

board/common/uboot/env.dtsi

@@ -8,9 +8,13 @@
 &env {
 	vendor = "infix";
 	bootdelay = "-2";
-	bootcmd = "run ixboot";
+	bootcmd = "run ixbtn";
 	boot_targets = "virtio mmc";
 
+	ixbtn       = /incbin/("scripts/ixbtn.sh");
+	ixdevmode   = /incbin/("scripts/ixdevmode.sh");
+	ixfactory   = /incbin/("scripts/ixfactory.sh");
+	ixbtn       = /incbin/("scripts/ixbtn.sh");
 	ixboot      = /incbin/("scripts/ixboot.sh");
 	ixbootmedia = /incbin/("scripts/ixbootmedia.sh");
 	ixbootslot  = /incbin/("scripts/ixbootslot.sh");

board/common/uboot/scripts/ixbootslot.sh

@@ -15,6 +15,12 @@ if test "${prepared}" = "ok"; then
 	    echo "${slot}: Booting..."
 
 	    setenv bootargs_user "rauc.slot=${slot}"
+	    if test "${factory_reset}" = "yes"; then
+		setenv bootargs_user "${bootargs_user} finit.cond=factory-reset"
+	    fi
+	    if test "${dev_mode}" = "yes"; then
+		setenv bootargs_user "${bootargs_user} finit.cond=dev-mode"
+	    fi
 
 	    blkmap create boot
 	    blkmap get boot dev blkmapnum

board/common/uboot/scripts/ixbtn.sh

@@ -0,0 +1,13 @@
+setenv dev_mode no
+setenv factory_reset no
+
+echo -n "dev-mode:      "
+run ixdevmode
+echo -n "factory-reset: "
+run ixfactory
+
+if test "${dev_mode}" = "yes"; then
+    sleep 1 && run ixboot
+else
+    run ixboot
+fi

board/common/uboot/scripts/ixdevmode.sh

@@ -0,0 +1,3 @@
+if button dev-mode; then
+    setenv dev_mode yes
+fi

board/common/uboot/scripts/ixfactory.sh

@@ -0,0 +1,7 @@
+if button factory-reset; then
+    echo "Keep button pressed for 10 seconds to engage reset"
+    if sleep 10 && button factory-reset; then
+	setenv factory_reset yes
+	echo "FACTORY RESET ENGAGED"
+    fi
+fi