mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 05:50:17 +00:00
52746c43d6
The env_driver_lookup_default and env_get_default_location functions are about to get refactored to support loading from multiple environment. The name is therefore not really well suited anymore. Drop the default part to be a bit more relevant. Reviewed-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
154 lines
3.0 KiB
C
154 lines
3.0 KiB
C
/*
|
|
* Copyright (C) 2017 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <environment.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static struct env_driver *_env_driver_lookup(enum env_location loc)
|
|
{
|
|
struct env_driver *drv;
|
|
const int n_ents = ll_entry_count(struct env_driver, env_driver);
|
|
struct env_driver *entry;
|
|
|
|
drv = ll_entry_start(struct env_driver, env_driver);
|
|
for (entry = drv; entry != drv + n_ents; entry++) {
|
|
if (loc == entry->location)
|
|
return entry;
|
|
}
|
|
|
|
/* Not found */
|
|
return NULL;
|
|
}
|
|
|
|
static enum env_location env_get_location(void)
|
|
{
|
|
if IS_ENABLED(CONFIG_ENV_IS_IN_EEPROM)
|
|
return ENVL_EEPROM;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_IN_FAT)
|
|
return ENVL_FAT;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_IN_EXT4)
|
|
return ENVL_EXT4;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_IN_FLASH)
|
|
return ENVL_FLASH;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_IN_MMC)
|
|
return ENVL_MMC;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_IN_NAND)
|
|
return ENVL_NAND;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_IN_NVRAM)
|
|
return ENVL_NVRAM;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_IN_REMOTE)
|
|
return ENVL_REMOTE;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_IN_SPI_FLASH)
|
|
return ENVL_SPI_FLASH;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_IN_UBI)
|
|
return ENVL_UBI;
|
|
else if IS_ENABLED(CONFIG_ENV_IS_NOWHERE)
|
|
return ENVL_NOWHERE;
|
|
else
|
|
return ENVL_UNKNOWN;
|
|
}
|
|
|
|
static struct env_driver *env_driver_lookup(void)
|
|
{
|
|
enum env_location loc = env_get_location();
|
|
struct env_driver *drv;
|
|
|
|
drv = _env_driver_lookup(loc);
|
|
if (!drv) {
|
|
debug("%s: No environment driver for location %d\n", __func__,
|
|
loc);
|
|
return NULL;
|
|
}
|
|
|
|
return drv;
|
|
}
|
|
|
|
int env_get_char(int index)
|
|
{
|
|
struct env_driver *drv = env_driver_lookup();
|
|
int ret;
|
|
|
|
if (gd->env_valid == ENV_INVALID)
|
|
return default_environment[index];
|
|
if (!drv)
|
|
return -ENODEV;
|
|
if (!drv->get_char)
|
|
return *(uchar *)(gd->env_addr + index);
|
|
ret = drv->get_char(index);
|
|
if (ret < 0) {
|
|
debug("%s: Environment failed to load (err=%d)\n",
|
|
__func__, ret);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int env_load(void)
|
|
{
|
|
struct env_driver *drv = env_driver_lookup();
|
|
int ret = 0;
|
|
|
|
if (!drv)
|
|
return -ENODEV;
|
|
if (!drv->load)
|
|
return 0;
|
|
ret = drv->load();
|
|
if (ret) {
|
|
debug("%s: Environment failed to load (err=%d)\n", __func__,
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int env_save(void)
|
|
{
|
|
struct env_driver *drv = env_driver_lookup();
|
|
int ret;
|
|
|
|
if (!drv)
|
|
return -ENODEV;
|
|
if (!drv->save)
|
|
return -ENOSYS;
|
|
|
|
printf("Saving Environment to %s...\n", drv->name);
|
|
ret = drv->save();
|
|
if (ret) {
|
|
debug("%s: Environment failed to save (err=%d)\n", __func__,
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int env_init(void)
|
|
{
|
|
struct env_driver *drv = env_driver_lookup();
|
|
int ret = -ENOENT;
|
|
|
|
if (!drv)
|
|
return -ENODEV;
|
|
if (drv->init)
|
|
ret = drv->init();
|
|
if (ret == -ENOENT) {
|
|
gd->env_addr = (ulong)&default_environment[0];
|
|
gd->env_valid = ENV_VALID;
|
|
|
|
return 0;
|
|
} else if (ret) {
|
|
debug("%s: Environment failed to init (err=%d)\n", __func__,
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|