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| author | Eugeniu Rosca <erosca@de.adit-jv.com> | 2020-10-23 11:52:22 +0300 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2021-01-31 14:08:56 +0100 |
| commit | e74670adfe6425b94b8615b74b8aadc5425fb246 (patch) | |
| tree | 44e0ce27da7b9bcffb97f329bb372b871dc5e62c | |
| parent | e2ffb3be4986e9ecbfb6ec22e8458ef16873912d (diff) | |
| download | u-boot-e74670adfe6425b94b8615b74b8aadc5425fb246.tar.gz u-boot-e74670adfe6425b94b8615b74b8aadc5425fb246.tar.bz2 u-boot-e74670adfe6425b94b8615b74b8aadc5425fb246.zip | |
cmd: bcb: Expose 'bcb_write_reboot_reason' to external callers
Fastboot is evolving and beginning with commit [1], the
upstream implementation expects bootloaders to offer support for:
- reboot-recovery
- reboot-fastboot
The most natural way to achieve the above is through a set of
pre-defined "reboot reason" strings, written into / read from
the BCB "command" field, e.g.:
- bootonce-bootloader [2]
- boot-fastboot [3]
- boot-recovery [4]
Expose the first 'bcb' API meant to be called by e.g. fastboot stack,
to allow updating the BCB reboot reason via the BCB 'command' field.
[1] https://android.googlesource.com/platform/system/core/+/dea91b4b5354af2
("Add fastbootd.")
[2] https://android.googlesource.com/platform/bootable/recovery/+/cba7fa88d8b9
("Add 'reboot bootloader' to bootloader_message.")
[3] https://android.googlesource.com/platform/bootable/recovery/+/eee4e260f9f6
("recovery: Add "boot-fastboot" command to BCB.")
[4] https://android.googlesource.com/platform/system/core/+/5e98b633a748695f
("init: Write the reason in BCB on "reboot recovery"")
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Roman Kovalivskyi <roman.kovalivskyi@globallogic.com>
[lukma - added missing #include <linux/errno.h> to avoid build breaks]
| -rw-r--r-- | cmd/bcb.c | 20 | ||||
| -rw-r--r-- | include/bcb.h | 21 |
2 files changed, 41 insertions, 0 deletions
@@ -6,6 +6,7 @@ */ #include <android_bootloader_message.h> +#include <bcb.h> #include <command.h> #include <common.h> #include <log.h> @@ -307,6 +308,25 @@ static int do_bcb_store(struct cmd_tbl *cmdtp, int flag, int argc, return __bcb_store(); } +int bcb_write_reboot_reason(int devnum, char *partp, char *reasonp) +{ + int ret; + + ret = __bcb_load(devnum, partp); + if (ret != CMD_RET_SUCCESS) + return ret; + + ret = __bcb_set("command", reasonp); + if (ret != CMD_RET_SUCCESS) + return ret; + + ret = __bcb_store(); + if (ret != CMD_RET_SUCCESS) + return ret; + + return 0; +} + static struct cmd_tbl cmd_bcb_sub[] = { U_BOOT_CMD_MKENT(load, CONFIG_SYS_MAXARGS, 1, do_bcb_load, "", ""), U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 1, do_bcb_set, "", ""), diff --git a/include/bcb.h b/include/bcb.h new file mode 100644 index 0000000000..5bb8d8346c --- /dev/null +++ b/include/bcb.h @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2020 Eugeniu Rosca <rosca.eugeniu@gmail.com> + * + * Android Bootloader Control Block Header + */ + +#ifndef __BCB_H__ +#define __BCB_H__ + +#if CONFIG_IS_ENABLED(CMD_BCB) +int bcb_write_reboot_reason(int devnum, char *partp, char *reasonp); +#else +#include <linux/errno.h> +static inline int bcb_write_reboot_reason(int devnum, char *partp, char *reasonp) +{ + return -EOPNOTSUPP; +} +#endif + +#endif /* __BCB_H__ */ |