blob: 595954542a6e740af984492127da8e955b389e39 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008 - 2009
* Windriver, <www.windriver.com>
* Tom Rix <Tom.Rix@windriver.com>
*
* Copyright 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Copyright 2014 Linaro, Ltd.
* Rob Herring <robh@kernel.org>
*/
#include <bcb.h>
#include <bootm.h>
#include <common.h>
#include <command.h>
#include <env.h>
#include <fastboot.h>
#include <net.h>
/**
* fastboot_buf_addr - base address of the fastboot download buffer
*/
ulong fastboot_buf_addr;
/**
* fastboot_buf_size - size of the fastboot download buffer
*/
u32 fastboot_buf_size;
/**
* fastboot_progress_callback - callback executed during long operations
*/
void (*fastboot_progress_callback)(const char *msg);
/**
* fastboot_response() - Writes a response of the form "$tag$reason".
*
* @tag: The first part of the response
* @response: Pointer to fastboot response buffer
* @format: printf style format string
*/
void fastboot_response(const char *tag, char *response,
const char *format, ...)
{
va_list args;
strlcpy(response, tag, FASTBOOT_RESPONSE_LEN);
if (format) {
va_start(args, format);
vsnprintf(response + strlen(response),
FASTBOOT_RESPONSE_LEN - strlen(response) - 1,
format, args);
va_end(args);
}
}
/**
* fastboot_fail() - Write a FAIL response of the form "FAIL$reason".
*
* @reason: Pointer to returned reason string
* @response: Pointer to fastboot response buffer
*/
void fastboot_fail(const char *reason, char *response)
{
fastboot_response("FAIL", response, "%s", reason);
}
/**
* fastboot_okay() - Write an OKAY response of the form "OKAY$reason".
*
* @reason: Pointer to returned reason string, or NULL to send a bare "OKAY"
* @response: Pointer to fastboot response buffer
*/
void fastboot_okay(const char *reason, char *response)
{
if (reason)
fastboot_response("OKAY", response, "%s", reason);
else
fastboot_response("OKAY", response, NULL);
}
/**
* fastboot_set_reboot_flag() - Set flag to indicate reboot-bootloader
*
* Set flag which indicates that we should reboot into the bootloader
* following the reboot that fastboot executes after this function.
*
* This function should be overridden in your board file with one
* which sets whatever flag your board specific Android bootloader flow
* requires in order to re-enter the bootloader.
*/
int __weak fastboot_set_reboot_flag(enum fastboot_reboot_reason reason)
{
int ret;
static const char * const boot_cmds[] = {
[FASTBOOT_REBOOT_REASON_BOOTLOADER] = "bootonce-bootloader",
[FASTBOOT_REBOOT_REASON_FASTBOOTD] = "boot-fastboot",
[FASTBOOT_REBOOT_REASON_RECOVERY] = "boot-recovery"
};
const int mmc_dev = config_opt_enabled(CONFIG_FASTBOOT_FLASH_MMC,
CONFIG_FASTBOOT_FLASH_MMC_DEV, -1);
if (!IS_ENABLED(CONFIG_FASTBOOT_FLASH_MMC))
return -EINVAL;
if (reason >= FASTBOOT_REBOOT_REASONS_COUNT)
return -EINVAL;
ret = bcb_find_partition_and_load("mmc", mmc_dev, "misc");
if (ret)
goto out;
ret = bcb_set(BCB_FIELD_COMMAND, boot_cmds[reason]);
if (ret)
goto out;
ret = bcb_store();
out:
bcb_reset();
return ret;
}
/**
* fastboot_get_progress_callback() - Return progress callback
*
* Return: Pointer to function called during long operations
*/
void (*fastboot_get_progress_callback(void))(const char *)
{
return fastboot_progress_callback;
}
/**
* fastboot_boot() - Execute fastboot boot command
*
* If ${fastboot_bootcmd} is set, run that command to execute the boot
* process, if that returns, then exit the fastboot server and return
* control to the caller.
*
* Otherwise execute "bootm <fastboot_buf_addr>", if that fails, reset
* the board.
*/
void fastboot_boot(void)
{
char *s = NULL;
if (IS_ENABLED(CONFIG_CMDLINE)) {
s = env_get("fastboot_bootcmd");
if (s)
run_command(s, CMD_FLAG_ENV);
}
if (!s && IS_ENABLED(CONFIG_BOOTM)) {
int ret;
printf("Booting kernel at %lx...\n\n\n", fastboot_buf_addr);
ret = bootm_boot_start(fastboot_buf_addr, NULL);
/*
* This only happens if image is somehow faulty so we start
* over. We deliberately leave this policy to the invocation
* of fastbootcmd if that's what's being run
*/
do_reset(NULL, 0, 0, NULL);
}
}
/**
* fastboot_handle_boot() - Shared implementation of system reaction to
* fastboot commands
*
* Making desceisions about device boot state (stay in fastboot, reboot
* to bootloader, reboot to OS, etc).
*/
void fastboot_handle_boot(int command, bool success)
{
if (!success)
return;
switch (command) {
case FASTBOOT_COMMAND_BOOT:
fastboot_boot();
net_set_state(NETLOOP_SUCCESS);
break;
case FASTBOOT_COMMAND_CONTINUE:
net_set_state(NETLOOP_SUCCESS);
break;
case FASTBOOT_COMMAND_REBOOT:
case FASTBOOT_COMMAND_REBOOT_BOOTLOADER:
case FASTBOOT_COMMAND_REBOOT_FASTBOOTD:
case FASTBOOT_COMMAND_REBOOT_RECOVERY:
do_reset(NULL, 0, 0, NULL);
break;
}
}
/**
* fastboot_set_progress_callback() - set progress callback
*
* @progress: Pointer to progress callback
*
* Set a callback which is invoked periodically during long running operations
* (flash and erase). This can be used (for example) by the UDP transport to
* send INFO responses to keep the client alive whilst those commands are
* executing.
*/
void fastboot_set_progress_callback(void (*progress)(const char *msg))
{
fastboot_progress_callback = progress;
}
void fastboot_init(ulong buf_addr, u32 buf_size)
{
fastboot_buf_addr = buf_addr ? buf_addr : CONFIG_FASTBOOT_BUF_ADDR;
fastboot_buf_size = buf_size ? buf_size : CONFIG_FASTBOOT_BUF_SIZE;
fastboot_set_progress_callback(NULL);
}