From a7ee53a91b59b69b858c6cc78903d16340ebf9e2 Mon Sep 17 00:00:00 2001
From: Aswath Govindraju <a-govindraju@ti.com>
Date: Mon, 2 Aug 2021 21:39:55 +0530
Subject: [PATCH] include: configs: am64x_evm: Add env variables for booting to
 kernel using USB MSC device

Add env variables for booting to kernel from USB MSC device. The second
partition in the USB MSC device needs to formatted as ext4 file system with
kernel and dtb images, present in the /boot folder.

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
---
 include/configs/am64x_evm.h | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/include/configs/am64x_evm.h b/include/configs/am64x_evm.h
index 9fbac9729b..b010fff0e0 100644
--- a/include/configs/am64x_evm.h
+++ b/include/configs/am64x_evm.h
@@ -96,6 +96,34 @@
 		"${bootdir}/${name_fit}\0"				\
 	"partitions=" PARTS_DEFAULT
 
+#define EXTRA_ENV_AM642_BOARD_SETTING_USBMSC				\
+	"args_usb=run finduuid;setenv bootargs console=${console} "	\
+		"${optargs} "						\
+		"root=PARTUUID=${uuid} rw "				\
+		"rootfstype=${mmcrootfstype}\0"				\
+	"init_usb=run args_all args_usb\0"				\
+	"get_fdt_usb=load usb ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}\0" \
+	"get_overlay_usb="						\
+		"fdt address ${fdtaddr};"				\
+		"fdt resize 0x100000;"					\
+		"for overlay in $name_overlays;"			\
+		"do;"							\
+		"load usb ${bootpart} ${dtboaddr} ${bootdir}/${overlay} && "	\
+		"fdt apply ${dtboaddr};"				\
+		"done;\0"						\
+	"get_kern_usb=load usb ${bootpart} ${loadaddr} "		\
+		"${bootdir}/${name_kern}\0"				\
+	"get_fit_usb=load usb ${bootpart} ${addr_fit} "			\
+		"${bootdir}/${name_fit}\0"				\
+	"usbboot=setenv boot usb;"					\
+		"setenv bootpart 0:2;"					\
+		"usb start;"							\
+		"run findfdt;"						\
+		"run init_usb;"						\
+		"run get_kern_usb;"					\
+		"run get_fdt_usb;"					\
+		"run run_kern\0"
+
 #ifdef CONFIG_TARGET_AM642_A53_EVM
 #define EXTRA_ENV_AM642_BOARD_SETTINGS_MTD				\
 	"mtdids=" CONFIG_MTDIDS_DEFAULT "\0"				\
@@ -118,7 +146,8 @@
 	EXTRA_ENV_AM642_BOARD_SETTINGS					\
 	EXTRA_ENV_AM642_BOARD_SETTINGS_MMC				\
 	EXTRA_ENV_AM642_BOARD_SETTINGS_MTD				\
-	EXTRA_ENV_DFUARGS
+	EXTRA_ENV_DFUARGS						\
+	EXTRA_ENV_AM642_BOARD_SETTING_USBMSC
 
 /* Now for the remaining common defines */
 #include <configs/ti_armv7_common.h>