diff options
Diffstat (limited to 'drivers/fastboot/fb_common.c')
| -rw-r--r-- | drivers/fastboot/fb_common.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/drivers/fastboot/fb_common.c b/drivers/fastboot/fb_common.c new file mode 100644 index 0000000000..c6e06aab7a --- /dev/null +++ b/drivers/fastboot/fb_common.c @@ -0,0 +1,169 @@ +// 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 <common.h> +#include <fastboot.h> +#include <net/fastboot.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); + } +} + +/** + * 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(void) +{ + return -ENOSYS; +} + +/** + * 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 { + static char boot_addr_start[12]; + 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_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); +} |