| // 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 <common.h> |
| #include <command.h> |
| #include <env.h> |
| #include <fastboot.h> |
| #include <net.h> |
| |
| /** |
| * fastboot_buf_addr - base address of the fastboot download buffer |
| */ |
| void *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); |
| debug("## FASTBOOT: %s\n", response); |
| } |
| } |
| |
| /** |
| * 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) |
| { |
| 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; |
| |
| return bcb_write_reboot_reason(mmc_dev, "misc", boot_cmds[reason]); |
| } |
| |
| /** |
| * 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; |
| |
| s = env_get("fastboot_bootcmd"); |
| if (s) { |
| run_command(s, CMD_FLAG_ENV); |
| } else if (IS_ENABLED(CONFIG_CMD_BOOTM)) { |
| static char boot_addr_start[20]; |
| static char *const bootm_args[] = { |
| "bootm", boot_addr_start, NULL |
| }; |
| |
| snprintf(boot_addr_start, sizeof(boot_addr_start) - 1, |
| "0x%p", fastboot_buf_addr); |
| printf("Booting kernel at %s...\n\n\n", boot_addr_start); |
| |
| do_bootm(NULL, 0, 2, bootm_args); |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * fastboot_init() - initialise new fastboot protocol session |
| * |
| * @buf_addr: Pointer to download buffer, or NULL for default |
| * @buf_size: Size of download buffer, or zero for default |
| */ |
| void fastboot_init(void *buf_addr, u32 buf_size) |
| { |
| fastboot_buf_addr = buf_addr ? buf_addr : |
| (void *)CONFIG_FASTBOOT_BUF_ADDR; |
| fastboot_buf_size = buf_size ? buf_size : CONFIG_FASTBOOT_BUF_SIZE; |
| fastboot_set_progress_callback(NULL); |
| } |