From 552362c4c92b721f729b1ac71ba4d8252fa17179 Mon Sep 17 00:00:00 2001
From: Jaehoon Chung <jh80.chung@samsung.com>
Date: Thu, 16 Jun 2022 16:47:45 +0900
Subject: [PATCH] tizen: rpi4: support A/B boot on PRi4 target

Support A/B boot on RPi4.
It has to be partition-param.bin file to distinguish with
a/b in inform partition. Then bootscript can be parsing its value.

partition-param.bin can be changed to other name.
But it has to change also slotfile of uboot's environment as same value.

Change-Id: I143b9485117a0f10ed3d427a1f3f15b4a86ffd43
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
---
 include/samsung/tizen_rpi.h          |  5 +++-
 tizen/bootscript/tizen-boot-rpi4.scr | 57 ++++++++++++++++++++++++++++++++----
 2 files changed, 55 insertions(+), 7 deletions(-)

diff --git a/include/samsung/tizen_rpi.h b/include/samsung/tizen_rpi.h
index 8190d63..42c30c6 100644
--- a/include/samsung/tizen_rpi.h
+++ b/include/samsung/tizen_rpi.h
@@ -95,12 +95,15 @@
 	"mmcrootpart=2\0"			\
 	"mmcinformpart=9\0"			\
 	"rebootparamfile=reboot-param.bin\0"	\
+	"slotfile=partition-param.bin\0"	\
+	"slot_addr=0x02200000\0"		\
 	"rebootparam_addr=0x02100000\0"		\
 	"upgrade_val=72677075\0"		\
 	"recovery_val=72766372\0"		\
 	"nodef_val=6665646e\0"			\
 	"download_val=6c6e7764\0"		\
 	"ramdiskpart=7\0"			\
+	"part=7\0"				\
 	"bootmode=ramdisk\0"			\
 	"bootdev=mmc\0"				\
 	"tfm=setenv bootmode download; run bootcmd\0"	\
@@ -108,7 +111,7 @@
 		TIZEN_VC_MEM				\
 		"8250.nr_uarts=1 dma.dmachans=0x7f35 bcm2709.serial=0xed6687d3 "		\
 		"bcm2709.uart_clock=48000000 dwc_otg.lpm_enable=0\0"	\
-	"opts=loglevel=4 partition_ab=a\0"			\
+	"opts=loglevel=4\0"			\
 	"dfu_usb_con=0\0"			\
 	"dfu_interface=mmc\0"			\
 	"dfu_device=" __stringify(CONFIG_MMC_DEFAULT_DEV) "\0" \
diff --git a/tizen/bootscript/tizen-boot-rpi4.scr b/tizen/bootscript/tizen-boot-rpi4.scr
index eb41047..a33612b 100644
--- a/tizen/bootscript/tizen-boot-rpi4.scr
+++ b/tizen/bootscript/tizen-boot-rpi4.scr
@@ -8,16 +8,54 @@ if test "${target}" = "usb0"; then;
 	setenv opts "${opts} rootdelay=2"
 fi
 
+if test -e $bootdev $mmcbootdev:$mmcinformpart $slotfile; then;
+	ext4load $bootdev $mmcbootdev:$mmcinformpart $slot_addr $slotfile;
+	if itest.b *${slot_addr} == 62}; then;
+		setenv ramdiskpart 0xe
+		setenv part 14
+		setenv partition_ab b
+		echo "boot from slot_b";
+	else
+		setenv ramdiskpart 7
+		setenv part 7
+		setenv partition_ab a
+		echo "boot from slot_a";
+	fi
+else
+	setenv ramdiskpart 7
+	setenv part 7
+	setenv partition_ab a
+	echo "boot from slot_a";
+fi
+
 if test -e $bootdev $mmcbootdev:$mmcinformpart $rebootparamfile; then;
 	ext4load $bootdev $mmcbootdev:$mmcinformpart $rebootparam_addr $rebootparamfile;
 	if itest.l *${rebootparam_addr} == ${upgrade_val}; then;
-		setenv ramdiskpart 8
+		if test "${partition_ab}" = "b"; then
+			setenv ramdiskpart 0xf
+			setenv part 15
+		else
+			setenv ramdiskpart 8
+			setenv part 8
+		fi
 		setenv bootmode fota
 	elif itest.l *${rebootparam_addr} == ${recovery_val}; then;
-		setenv ramdiskpart 8
+		if test "${partition_ab}" = "b"; then
+			setenv ramdiskpart 0xf
+			setenv part 15
+		else
+			setenv ramdiskpart 8
+			setenv part 8
+		fi
 		setenv bootmode recovery
 	elif itest.l *${rebootparam_addr} == ${download_val}; then;
-		setenv ramdiskpart 8
+		if test "${partition_ab}" = "b"; then
+			setenv ramdiskpart 0xf
+			setenv part 15
+		else
+			setenv ramdiskpart 8
+			setenv part 8
+		fi
 		setenv bootmode flash
 	elif itest.l *${rebootparam_addr} == ${nodef_val}; then;
 		echo "This reboot parameter is not supported...";
@@ -26,7 +64,13 @@ fi
 
 # This is for jumping to flash mode on u-boot.
 if test "${bootmode}" = "download"; then;
-	setenv ramdiskpart 8
+	if test "${partition_ab}" = "b"; then
+		setenv ramdiskpart 0xf
+		setenv part 15
+	else
+		setenv ramdiskpart 8
+		setenv part 8
+	fi
 	setenv bootmode flash
 fi
 
@@ -59,7 +103,7 @@ echo "console: ${console}"
 setenv boot_prefixes \"/\"
 
 # To use cmdline for using serial console. /* Normal mode */
-setenv bootargs \"${tizen_bootarg} root=/dev/${rootdev} rw bootmode=${bootmode} rootwait ${console} ${opts} ${ip_opt}\"
+setenv bootargs \"${tizen_bootarg} root=/dev/${rootdev} rw bootmode=${bootmode} partition_ab=${partition_ab} rootwait ${console} ${opts} ${ip_opt}\"
 
 # Find the ramdisk offset and block count
 part start $bootdev $mmcrootdev $ramdiskpart ramdisk_start
@@ -73,7 +117,8 @@ echo "Searching for kernel in"; for prefix in $boot_prefixes; do
 if load $bootdev $mmcbootdev:$mmcbootpart $tizen_kernel_addr_r $prefix$kernel; then;
 	echo ${bootmode} "boot";
 	if test -e $bootdev $mmcrootdev:$ramdiskpart sbin/init; then;
-		echo "Loading Ramdisk from partition"${ramdiskpart};
+		echo "Loading Ramdisk from partition"${part};
+		echo "Environment value of ramdiskpart is" ${ramdiskpart};
 		$bootdev read $ramdisk_addr_r $ramdisk_start $ramdisk_size;
 	fi
 
-- 
2.7.4