configs: meson64_android: implement A/B slot support

Implement A/B slot selection using the U-Boot ab_select command.

Keep support for non A/B.

Not: We need to redefine the recovery partition label, as RecoveryOS
is included in the boot image for A/B systems [1]

[1] https://source.android.com/devices/tech/ota/ab/ab_implement#recovery
Signed-off-by: Guillaume La Roque <glaroque@baylibre.com>
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

diff --git a/include/configs/meson64_android.h b/include/configs/meson64_android.h
index 48a23b6..83fa25b 100644 (file)
--- a/include/configs/meson64_android.h
+++ b/include/configs/meson64_android.h
@@ -25,9 +25,6 @@
 #define CONTROL_PARTITION "misc"
 #endif
 
-#ifndef RECOVERY_PARTITION
-#define RECOVERY_PARTITION "recovery"
-
 #if defined(CONFIG_CMD_AVB)
 #define AVB_VERIFY_CHECK \
        "if test \"${force_avb}\" -eq 1; then " \
@@ -42,12 +39,48 @@
                "echo Running without AVB...; "\
        "fi;"
 
-#define AVB_VERIFY_CMD "avb_verify=avb init ${mmcdev}; avb verify;\0"
+#define AVB_VERIFY_CMD "avb_verify=avb init ${mmcdev}; avb verify $slot_suffix;\0"
 #else
 #define AVB_VERIFY_CHECK ""
 #define AVB_VERIFY_CMD ""
 #endif
 
+#if defined(CONFIG_CMD_AB_SELECT)
+#define ANDROIDBOOT_GET_CURRENT_SLOT_CMD "get_current_slot=" \
+       "if part number mmc ${mmcdev} " CONTROL_PARTITION " control_part_number; " \
+       "then " \
+               "echo " CONTROL_PARTITION \
+                       " partition number:${control_part_number};" \
+               "ab_select current_slot mmc ${mmcdev}:${control_part_number};" \
+       "else " \
+               "echo " CONTROL_PARTITION " partition not found;" \
+       "fi;\0"
+
+#define AB_SELECT_SLOT \
+       "run get_current_slot; " \
+       "if test -e \"${current_slot}\"; " \
+       "then " \
+               "setenv slot_suffix _${current_slot}; " \
+       "else " \
+               "echo current_slot not found;" \
+               "exit;" \
+       "fi;"
+
+#define AB_SELECT_ARGS \
+       "setenv bootargs_ab androidboot.slot_suffix=${slot_suffix}; " \
+       "echo A/B cmdline addition: ${bootargs_ab};" \
+       "setenv bootargs ${bootargs} ${bootargs_ab};"
+
+#define AB_BOOTARGS " androidboot.force_normal_boot=1"
+#define RECOVERY_PARTITION "boot"
+#else
+#define AB_SELECT_SLOT ""
+#define AB_SELECT_ARGS " "
+#define ANDROIDBOOT_GET_CURRENT_SLOT_CMD ""
+#define AB_BOOTARGS " "
+#define RECOVERY_PARTITION "recovery"
+#endif
+
 #define BOOTENV_DEV_FASTBOOT(devtypeu, devtypel, instance) \
        "bootcmd_fastboot=" \
                "setenv run_fastboot 0;" \
@@ -112,9 +145,11 @@
                        "echo Running Recovery...;" \
                        "mmc dev ${mmcdev};" \
                        "setenv bootargs \"${bootargs} androidboot.serialno=${serial#}\";" \
+                       AB_SELECT_SLOT \
+                       AB_SELECT_ARGS \
                        AVB_VERIFY_CHECK \
-                       "part start mmc ${mmcdev} " RECOVERY_PARTITION " boot_start;" \
-                       "part size mmc ${mmcdev} " RECOVERY_PARTITION " boot_size;" \
+                       "part start mmc ${mmcdev} " RECOVERY_PARTITION "${slot_suffix} boot_start;" \
+                       "part size mmc ${mmcdev} " RECOVERY_PARTITION "${slot_suffix} boot_size;" \
                        "if mmc read ${loadaddr} ${boot_start} ${boot_size}; then " \
                                "echo Running Android Recovery...;" \
                                "bootm ${loadaddr};" \
@@ -131,10 +166,13 @@
                "echo Loading Android " BOOT_PARTITION " partition...;" \
                "mmc dev ${mmcdev};" \
                "setenv bootargs ${bootargs} androidboot.serialno=${serial#};" \
+               AB_SELECT_SLOT \
+               AB_SELECT_ARGS \
                AVB_VERIFY_CHECK \
-               "part start mmc ${mmcdev} " BOOT_PARTITION " boot_start;" \
-               "part size mmc ${mmcdev} " BOOT_PARTITION " boot_size;" \
+               "part start mmc ${mmcdev} " BOOT_PARTITION "${slot_suffix} boot_start;" \
+               "part size mmc ${mmcdev} " BOOT_PARTITION "${slot_suffix} boot_size;" \
                "if mmc read ${loadaddr} ${boot_start} ${boot_size}; then " \
+                       "setenv bootargs \"${bootargs} " AB_BOOTARGS "\"  ; " \
                        "echo Running Android...;" \
                        "bootm ${loadaddr};" \
                "fi;" \
@@ -163,6 +201,7 @@
 #define CONFIG_EXTRA_ENV_SETTINGS                                     \
        "partitions=" PARTS_DEFAULT "\0"                              \
        "mmcdev=2\0"                                                  \
+       ANDROIDBOOT_GET_CURRENT_SLOT_CMD                              \
        AVB_VERIFY_CMD                                                \
        "force_avb=0\0"                                               \
        "gpio_recovery=88\0"                                          \