env_ubi.c
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/*
* (c) Copyright 2012 by National Instruments,
* Joe Hershberger <joe.hershberger@ni.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <environment.h>
#include <errno.h>
#include <malloc.h>
#include <search.h>
#include <ubi_uboot.h>
#undef crc32
char *env_name_spec = "UBI";
env_t *env_ptr;
DECLARE_GLOBAL_DATA_PTR;
int env_init(void)
{
/* use default */
gd->env_addr = (ulong)&default_environment[0];
gd->env_valid = 1;
return 0;
}
#ifdef CONFIG_CMD_SAVEENV
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
static unsigned char env_flags;
int saveenv(void)
{
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
ssize_t len;
char *res;
res = (char *)&env_new->data;
len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
return 1;
}
if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
printf("\n** Cannot find mtd partition \"%s\"\n",
CONFIG_ENV_UBI_PART);
return 1;
}
env_new->crc = crc32(0, env_new->data, ENV_SIZE);
env_new->flags = ++env_flags; /* increase the serial */
if (gd->env_valid == 1) {
puts("Writing to redundant UBI... ");
if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME_REDUND,
(void *)env_new, CONFIG_ENV_SIZE)) {
printf("\n** Unable to write env to %s:%s **\n",
CONFIG_ENV_UBI_PART,
CONFIG_ENV_UBI_VOLUME_REDUND);
return 1;
}
} else {
puts("Writing to UBI... ");
if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME,
(void *)env_new, CONFIG_ENV_SIZE)) {
printf("\n** Unable to write env to %s:%s **\n",
CONFIG_ENV_UBI_PART,
CONFIG_ENV_UBI_VOLUME);
return 1;
}
}
puts("done\n");
gd->env_valid = gd->env_valid == 2 ? 1 : 2;
return 0;
}
#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
int saveenv(void)
{
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
ssize_t len;
char *res;
res = (char *)&env_new->data;
len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
return 1;
}
if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
printf("\n** Cannot find mtd partition \"%s\"\n",
CONFIG_ENV_UBI_PART);
return 1;
}
env_new->crc = crc32(0, env_new->data, ENV_SIZE);
if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, (void *)env_new,
CONFIG_ENV_SIZE)) {
printf("\n** Unable to write env to %s:%s **\n",
CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
return 1;
}
puts("done\n");
return 0;
}
#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
#endif /* CONFIG_CMD_SAVEENV */
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
void env_relocate_spec(void)
{
ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf, CONFIG_ENV_SIZE);
ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf, CONFIG_ENV_SIZE);
int crc1_ok = 0, crc2_ok = 0;
env_t *ep, *tmp_env1, *tmp_env2;
tmp_env1 = (env_t *)env1_buf;
tmp_env2 = (env_t *)env2_buf;
if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
printf("\n** Cannot find mtd partition \"%s\"\n",
CONFIG_ENV_UBI_PART);
set_default_env(NULL);
return;
}
if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1,
CONFIG_ENV_SIZE)) {
printf("\n** Unable to read env from %s:%s **\n",
CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
}
if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND, (void *)tmp_env2,
CONFIG_ENV_SIZE)) {
printf("\n** Unable to read redundant env from %s:%s **\n",
CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND);
}
crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc;
crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc;
if (!crc1_ok && !crc2_ok) {
set_default_env("!bad CRC");
return;
} else if (crc1_ok && !crc2_ok) {
gd->env_valid = 1;
} else if (!crc1_ok && crc2_ok) {
gd->env_valid = 2;
} else {
/* both ok - check serial */
if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
gd->env_valid = 2;
else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
gd->env_valid = 1;
else if (tmp_env1->flags > tmp_env2->flags)
gd->env_valid = 1;
else if (tmp_env2->flags > tmp_env1->flags)
gd->env_valid = 2;
else /* flags are equal - almost impossible */
gd->env_valid = 1;
}
if (gd->env_valid == 1)
ep = tmp_env1;
else
ep = tmp_env2;
env_flags = ep->flags;
env_import((char *)ep, 0);
}
#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
void env_relocate_spec(void)
{
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
printf("\n** Cannot find mtd partition \"%s\"\n",
CONFIG_ENV_UBI_PART);
set_default_env(NULL);
return;
}
if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)&buf,
CONFIG_ENV_SIZE)) {
printf("\n** Unable to read env from %s:%s **\n",
CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
set_default_env(NULL);
return;
}
env_import(buf, 1);
}
#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */