1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2008 - 2009
4 * Windriver, <www.windriver.com>
5 * Tom Rix <Tom.Rix@windriver.com>
7 * Copyright 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9 * Copyright 2014 Linaro, Ltd.
10 * Rob Herring <robh@kernel.org>
17 #include <net/fastboot.h>
20 * fastboot_buf_addr - base address of the fastboot download buffer
22 void *fastboot_buf_addr;
25 * fastboot_buf_size - size of the fastboot download buffer
27 u32 fastboot_buf_size;
30 * fastboot_progress_callback - callback executed during long operations
32 void (*fastboot_progress_callback)(const char *msg);
35 * fastboot_response() - Writes a response of the form "$tag$reason".
37 * @tag: The first part of the response
38 * @response: Pointer to fastboot response buffer
39 * @format: printf style format string
41 void fastboot_response(const char *tag, char *response,
42 const char *format, ...)
46 strlcpy(response, tag, FASTBOOT_RESPONSE_LEN);
48 va_start(args, format);
49 vsnprintf(response + strlen(response),
50 FASTBOOT_RESPONSE_LEN - strlen(response) - 1,
57 * fastboot_fail() - Write a FAIL response of the form "FAIL$reason".
59 * @reason: Pointer to returned reason string
60 * @response: Pointer to fastboot response buffer
62 void fastboot_fail(const char *reason, char *response)
64 fastboot_response("FAIL", response, "%s", reason);
68 * fastboot_okay() - Write an OKAY response of the form "OKAY$reason".
70 * @reason: Pointer to returned reason string, or NULL to send a bare "OKAY"
71 * @response: Pointer to fastboot response buffer
73 void fastboot_okay(const char *reason, char *response)
76 fastboot_response("OKAY", response, "%s", reason);
78 fastboot_response("OKAY", response, NULL);
82 * fastboot_set_reboot_flag() - Set flag to indicate reboot-bootloader
84 * Set flag which indicates that we should reboot into the bootloader
85 * following the reboot that fastboot executes after this function.
87 * This function should be overridden in your board file with one
88 * which sets whatever flag your board specific Android bootloader flow
89 * requires in order to re-enter the bootloader.
91 int __weak fastboot_set_reboot_flag(enum fastboot_reboot_reason reason)
97 * fastboot_get_progress_callback() - Return progress callback
99 * Return: Pointer to function called during long operations
101 void (*fastboot_get_progress_callback(void))(const char *)
103 return fastboot_progress_callback;
107 * fastboot_boot() - Execute fastboot boot command
109 * If ${fastboot_bootcmd} is set, run that command to execute the boot
110 * process, if that returns, then exit the fastboot server and return
111 * control to the caller.
113 * Otherwise execute "bootm <fastboot_buf_addr>", if that fails, reset
116 void fastboot_boot(void)
120 s = env_get("fastboot_bootcmd");
122 run_command(s, CMD_FLAG_ENV);
124 static char boot_addr_start[20];
125 static char *const bootm_args[] = {
126 "bootm", boot_addr_start, NULL
129 snprintf(boot_addr_start, sizeof(boot_addr_start) - 1,
130 "0x%p", fastboot_buf_addr);
131 printf("Booting kernel at %s...\n\n\n", boot_addr_start);
133 do_bootm(NULL, 0, 2, bootm_args);
136 * This only happens if image is somehow faulty so we start
137 * over. We deliberately leave this policy to the invocation
138 * of fastbootcmd if that's what's being run
140 do_reset(NULL, 0, 0, NULL);
145 * fastboot_set_progress_callback() - set progress callback
147 * @progress: Pointer to progress callback
149 * Set a callback which is invoked periodically during long running operations
150 * (flash and erase). This can be used (for example) by the UDP transport to
151 * send INFO responses to keep the client alive whilst those commands are
154 void fastboot_set_progress_callback(void (*progress)(const char *msg))
156 fastboot_progress_callback = progress;
160 * fastboot_init() - initialise new fastboot protocol session
162 * @buf_addr: Pointer to download buffer, or NULL for default
163 * @buf_size: Size of download buffer, or zero for default
165 void fastboot_init(void *buf_addr, u32 buf_size)
167 fastboot_buf_addr = buf_addr ? buf_addr :
168 (void *)CONFIG_FASTBOOT_BUF_ADDR;
169 fastboot_buf_size = buf_size ? buf_size : CONFIG_FASTBOOT_BUF_SIZE;
170 fastboot_set_progress_callback(NULL);