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 <memalign.h>
#include <search.h>
#include <ubi_uboot.h>
#undef crc32
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_CMD_SAVEENV
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
static int env_ubi_save(void)
{
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
int ret;
ret = env_export(env_new);
if (ret)
return ret;
if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
printf("\n** Cannot find mtd partition \"%s\"\n",
CONFIG_ENV_UBI_PART);
return 1;
}
if (gd->env_valid == ENV_VALID) {
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 == ENV_REDUND ? ENV_VALID : ENV_REDUND;
return 0;
}
#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
static int env_ubi_save(void)
{
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
int ret;
ret = env_export(env_new);
if (ret)
return ret;
if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
printf("\n** Cannot find mtd partition \"%s\"\n",
CONFIG_ENV_UBI_PART);
return 1;
}
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
static int env_ubi_load(void)
{
ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf, CONFIG_ENV_SIZE);
ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf, CONFIG_ENV_SIZE);
int read1_fail, read2_fail;
env_t *tmp_env1, *tmp_env2;
/*
* In case we have restarted u-boot there is a chance that buffer
* contains old environment (from the previous boot).
* If UBI volume is zero size, ubi_volume_read() doesn't modify the
* buffer.
* We need to clear buffer manually here, so the invalid CRC will
* cause setting default environment as expected.
*/
memset(env1_buf, 0x0, CONFIG_ENV_SIZE);
memset(env2_buf, 0x0, CONFIG_ENV_SIZE);
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 -EIO;
}
read1_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1,
CONFIG_ENV_SIZE);
if (read1_fail)
printf("\n** Unable to read env from %s:%s **\n",
CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
read2_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND,
(void *)tmp_env2, CONFIG_ENV_SIZE);
if (read2_fail)
printf("\n** Unable to read redundant env from %s:%s **\n",
CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND);
return env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
read2_fail);
}
#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
static int env_ubi_load(void)
{
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
/*
* In case we have restarted u-boot there is a chance that buffer
* contains old environment (from the previous boot).
* If UBI volume is zero size, ubi_volume_read() doesn't modify the
* buffer.
* We need to clear buffer manually here, so the invalid CRC will
* cause setting default environment as expected.
*/
memset(buf, 0x0, 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 -EIO;
}
if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, 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 -EIO;
}
return env_import(buf, 1);
}
#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
U_BOOT_ENV_LOCATION(ubi) = {
.location = ENVL_UBI,
.load = env_ubi_load,
.save = env_save_ptr(env_ubi_save),
};