[openwrt/openwrt] mvebu: Add bootscript for espressobin to support mainline firmware

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch openwrt-19.07:
https://git.openwrt.org/7fbee0c7b2f6eebced44fd2060fbaac6fc5fd9e5

commit 7fbee0c7b2f6eebced44fd2060fbaac6fc5fd9e5
Author: Andre Heider <a.heider at gmail.com>
AuthorDate: Sat Sep 12 09:32:41 2020 +0200

    mvebu: Add bootscript for espressobin to support mainline firmware
    
    The generic bootscript is tailored around a downstream firmware and
    doesn't work on a firmware built from mainline components.
    
    Add a bootscript which:
    * sets $console since mainline u-boot doesn't do that
    * uses distro boot variables, so OpenWRT can be booted off any supported
      device when using a mainline firmware
    * sets missing distro boot variables for the downstream firmware
    
    Booting with a downstream firmware is unchanged.
    Booting with a mainline firmware now works.
    
    Signed-off-by: Andre Heider <a.heider at gmail.com>
    (cherry picked from commit c43b45863e38fb18a486601c1601f1485d649c0b)
---
 target/linux/mvebu/image/cortex-a53.mk          |  4 +++
 target/linux/mvebu/image/espressobin.bootscript | 34 +++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/target/linux/mvebu/image/cortex-a53.mk b/target/linux/mvebu/image/cortex-a53.mk
index d7014d6f02..7b3bcba06d 100644
--- a/target/linux/mvebu/image/cortex-a53.mk
+++ b/target/linux/mvebu/image/cortex-a53.mk
@@ -4,6 +4,7 @@ define Device/globalscale_espressobin
   $(call Device/Default-arm64)
   DEVICE_TITLE := ESPRESSObin (Marvell Armada 3700 Community Board)
   DEVICE_DTS := armada-3720-espressobin
+  BOOT_SCRIPT := espressobin
 endef
 TARGET_DEVICES += globalscale_espressobin
 
@@ -11,6 +12,7 @@ define Device/globalscale_espressobin-emmc
   $(call Device/Default-arm64)
   DEVICE_TITLE := ESPRESSObin eMMC (Marvell Armada 3700 Community Board)
   DEVICE_DTS := armada-3720-espressobin-emmc
+  BOOT_SCRIPT := espressobin
 endef
 TARGET_DEVICES += globalscale_espressobin-emmc
 
@@ -18,6 +20,7 @@ define Device/globalscale_espressobin-v7
   $(call Device/Default-arm64)
   DEVICE_TITLE := ESPRESSObin V7 (Marvell Armada 3700 Community Board)
   DEVICE_DTS := armada-3720-espressobin-v7
+  BOOT_SCRIPT := espressobin
 endef
 TARGET_DEVICES += globalscale_espressobin-v7
 
@@ -25,6 +28,7 @@ define Device/globalscale_espressobin-v7-emmc
   $(call Device/Default-arm64)
   DEVICE_TITLE := ESPRESSObin V7 eMMC (Marvell Armada 3700 Community Board)
   DEVICE_DTS := armada-3720-espressobin-v7-emmc
+  BOOT_SCRIPT := espressobin
 endef
 TARGET_DEVICES += globalscale_espressobin-v7-emmc
 
diff --git a/target/linux/mvebu/image/espressobin.bootscript b/target/linux/mvebu/image/espressobin.bootscript
new file mode 100644
index 0000000000..07765df979
--- /dev/null
+++ b/target/linux/mvebu/image/espressobin.bootscript
@@ -0,0 +1,34 @@
+# Bootscript for Globalscale ESPRESSOBin Board
+
+# Set distro variables if necessary for compability with downstream firmware
+if test -z "${kernel_addr_r}"; then
+	setenv kernel_addr_r 0x7000000
+fi
+
+if test -z "${fdt_add_r}"; then
+	setenv fdt_addr_r 0x6f00000
+fi
+
+if test -z "${devtype}"; then
+	setenv devtype mmc
+fi
+
+if test -z "${devnum}"; then
+	if mmc dev 0; then
+		setenv devnum 0
+	elif mmc dev 1; then
+		setenv devnum 1
+	fi
+fi
+
+# figure out partition uuid to pass to the kernel as root=
+part uuid ${devtype} ${devnum}:2 uuid
+
+setenv console "console=ttyMV0,115200 earlycon=ar3700_uart,0xd0012000"
+setenv bootargs "root=PARTUUID=${uuid} rw rootwait ${console}"
+
+echo "Booting Linux from ${devtype} ${devnum} with args: ${bootargs}"
+load ${devtype} ${devnum}:1 ${fdt_addr_r} @DTB at .dtb
+load ${devtype} ${devnum}:1 ${kernel_addr_r} Image
+
+booti ${kernel_addr_r} - ${fdt_addr_r}