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u-boot/common/update.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008 Semihalf
*
* Written by: Rafal Czubak <rcz@semihalf.com>
* Bartlomiej Sieka <tur@semihalf.com>
*/
#include <common.h>
#if !(defined(CONFIG_FIT) && defined(CONFIG_OF_LIBFDT))
#error "CONFIG_FIT and CONFIG_OF_LIBFDT are required for auto-update feature"
#endif
#if defined(CONFIG_UPDATE_TFTP) && !defined(CONFIG_MTD_NOR_FLASH)
#error "CONFIG_UPDATE_TFTP and !CONFIG_MTD_NOR_FLASH needed for legacy behaviour"
#endif
#include <command.h>
#include <flash.h>
#include <net.h>
#include <net/tftp.h>
#include <malloc.h>
#include <dfu.h>
#include <errno.h>
#include <mtd/cfi_flash.h>
/* env variable holding the location of the update file */
#define UPDATE_FILE_ENV "updatefile"
/* set configuration defaults if needed */
#ifndef CONFIG_UPDATE_LOAD_ADDR
#define CONFIG_UPDATE_LOAD_ADDR 0x100000
#endif
#ifndef CONFIG_UPDATE_TFTP_MSEC_MAX
#define CONFIG_UPDATE_TFTP_MSEC_MAX 100
#endif
#ifndef CONFIG_UPDATE_TFTP_CNT_MAX
#define CONFIG_UPDATE_TFTP_CNT_MAX 0
#endif
extern ulong tftp_timeout_ms;
extern int tftp_timeout_count_max;
extern ulong load_addr;
#ifdef CONFIG_MTD_NOR_FLASH
extern flash_info_t flash_info[];
static uchar *saved_prot_info;
#endif
static int update_load(char *filename, ulong msec_max, int cnt_max, ulong addr)
{
int size, rv;
ulong saved_timeout_msecs;
int saved_timeout_count;
char *saved_netretry, *saved_bootfile;
rv = 0;
/* save used globals and env variable */
saved_timeout_msecs = tftp_timeout_ms;
saved_timeout_count = tftp_timeout_count_max;
saved_netretry = strdup(env_get("netretry"));
saved_bootfile = strdup(net_boot_file_name);
/* set timeouts for auto-update */
tftp_timeout_ms = msec_max;
tftp_timeout_count_max = cnt_max;
/* we don't want to retry the connection if errors occur */
env_set("netretry", "no");
/* download the update file */
load_addr = addr;
copy_filename(net_boot_file_name, filename, sizeof(net_boot_file_name));
size = net_loop(TFTPGET);
if (size < 0)
rv = 1;
else if (size > 0)
flush_cache(addr, size);
/* restore changed globals and env variable */
tftp_timeout_ms = saved_timeout_msecs;
tftp_timeout_count_max = saved_timeout_count;
env_set("netretry", saved_netretry);
if (saved_netretry != NULL)
free(saved_netretry);
if (saved_bootfile != NULL) {
copy_filename(net_boot_file_name, saved_bootfile,
sizeof(net_boot_file_name));
free(saved_bootfile);
}
return rv;
}
#ifdef CONFIG_MTD_NOR_FLASH
static int update_flash_protect(int prot, ulong addr_first, ulong addr_last)
{
uchar *sp_info_ptr;
ulong s;
int i, bank, cnt;
flash_info_t *info;
sp_info_ptr = NULL;
if (prot == 0) {
saved_prot_info =
calloc(CONFIG_SYS_MAX_FLASH_BANKS * CONFIG_SYS_MAX_FLASH_SECT, 1);
if (!saved_prot_info)
return 1;
}
for (bank = 0; bank < CONFIG_SYS_MAX_FLASH_BANKS; ++bank) {
cnt = 0;
info = &flash_info[bank];
/* Nothing to do if the bank doesn't exist */
if (info->sector_count == 0)
return 0;
/* Point to current bank protection information */
sp_info_ptr = saved_prot_info + (bank * CONFIG_SYS_MAX_FLASH_SECT);
/*
* Adjust addr_first or addr_last if we are on bank boundary.
* Address space between banks must be continuous for other
* flash functions (like flash_sect_erase or flash_write) to
* succeed. Banks must also be numbered in correct order,
* according to increasing addresses.
*/
if (addr_last > info->start[0] + info->size - 1)
addr_last = info->start[0] + info->size - 1;
if (addr_first < info->start[0])
addr_first = info->start[0];
for (i = 0; i < info->sector_count; i++) {
/* Save current information about protected sectors */
if (prot == 0) {
s = info->start[i];
if ((s >= addr_first) && (s <= addr_last))
sp_info_ptr[i] = info->protect[i];
}
/* Protect/unprotect sectors */
if (sp_info_ptr[i] == 1) {
#if defined(CONFIG_SYS_FLASH_PROTECTION)
if (flash_real_protect(info, i, prot))
return 1;
#else
info->protect[i] = prot;
#endif
cnt++;
}
}
if (cnt) {
printf("%sProtected %d sectors\n",
prot ? "": "Un-", cnt);
}
}
if((prot == 1) && saved_prot_info)
free(saved_prot_info);
return 0;
}
#endif
static int update_flash(ulong addr_source, ulong addr_first, ulong size)
{
#ifdef CONFIG_MTD_NOR_FLASH
ulong addr_last = addr_first + size - 1;
/* round last address to the sector boundary */
if (flash_sect_roundb(&addr_last) > 0)
return 1;
if (addr_first >= addr_last) {
printf("Error: end address exceeds addressing space\n");
return 1;
}
/* remove protection on processed sectors */
if (update_flash_protect(0, addr_first, addr_last) > 0) {
printf("Error: could not unprotect flash sectors\n");
return 1;
}
printf("Erasing 0x%08lx - 0x%08lx", addr_first, addr_last);
if (flash_sect_erase(addr_first, addr_last) > 0) {
printf("Error: could not erase flash\n");
return 1;
}
printf("Copying to flash...");
if (flash_write((char *)addr_source, addr_first, size) > 0) {
printf("Error: could not copy to flash\n");
return 1;
}
printf("done\n");
/* enable protection on processed sectors */
if (update_flash_protect(1, addr_first, addr_last) > 0) {
printf("Error: could not protect flash sectors\n");
return 1;
}
#endif
return 0;
}
static int update_fit_getparams(const void *fit, int noffset, ulong *addr,
ulong *fladdr, ulong *size)
{
const void *data;
if (fit_image_get_data(fit, noffset, &data, (size_t *)size))
return 1;
if (fit_image_get_load(fit, noffset, (ulong *)fladdr))
return 1;
*addr = (ulong)data;
return 0;
}
int update_tftp(ulong addr, char *interface, char *devstring)
{
char *filename, *env_addr, *fit_image_name;
ulong update_addr, update_fladdr, update_size;
int images_noffset, ndepth, noffset;
bool update_tftp_dfu;
int ret = 0;
void *fit;
if (interface == NULL && devstring == NULL) {
update_tftp_dfu = false;
} else if (interface && devstring) {
update_tftp_dfu = true;
} else {
pr_err("Interface: %s and devstring: %s not supported!\n",
interface, devstring);
return -EINVAL;
}
/* use already present image */
if (addr)
goto got_update_file;
printf("Auto-update from TFTP: ");
/* get the file name of the update file */
filename = env_get(UPDATE_FILE_ENV);
if (filename == NULL) {
printf("failed, env. variable '%s' not found\n",
UPDATE_FILE_ENV);
return 1;
}
printf("trying update file '%s'\n", filename);
/* get load address of downloaded update file */
env_addr = env_get("loadaddr");
if (env_addr)
addr = simple_strtoul(env_addr, NULL, 16);
else
addr = CONFIG_UPDATE_LOAD_ADDR;
if (update_load(filename, CONFIG_UPDATE_TFTP_MSEC_MAX,
CONFIG_UPDATE_TFTP_CNT_MAX, addr)) {
printf("Can't load update file, aborting auto-update\n");
return 1;
}
got_update_file:
fit = (void *)addr;
if (!fit_check_format((void *)fit)) {
printf("Bad FIT format of the update file, aborting "
"auto-update\n");
return 1;
}
/* process updates */
images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
ndepth = 0;
noffset = fdt_next_node(fit, images_noffset, &ndepth);
while (noffset >= 0 && ndepth > 0) {
if (ndepth != 1)
goto next_node;
fit_image_name = (char *)fit_get_name(fit, noffset, NULL);
printf("Processing update '%s' :", fit_image_name);
if (!fit_image_verify(fit, noffset)) {
printf("Error: invalid update hash, aborting\n");
ret = 1;
goto next_node;
}
printf("\n");
if (update_fit_getparams(fit, noffset, &update_addr,
&update_fladdr, &update_size)) {
printf("Error: can't get update parameteres, "
"aborting\n");
ret = 1;
goto next_node;
}
if (!update_tftp_dfu) {
if (update_flash(update_addr, update_fladdr,
update_size)) {
printf("Error: can't flash update, aborting\n");
ret = 1;
goto next_node;
}
} else if (fit_image_check_type(fit, noffset,
IH_TYPE_FIRMWARE)) {
ret = dfu_tftp_write(fit_image_name, update_addr,
update_size, interface, devstring);
if (ret)
return ret;
}
next_node:
noffset = fdt_next_node(fit, noffset, &ndepth);
}
return ret;
}
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