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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
*/
/* #define DEBUG */
#include <common.h>
#include <command.h>
#include <environment.h>
#include <linux/stddef.h>
#include <errno.h>
#include <memalign.h>
#include <sata.h>
#include <search.h>
#if defined(CONFIG_ENV_SIZE_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
#error ENV REDUND not supported
#endif
#if !defined(CONFIG_ENV_OFFSET) || !defined(CONFIG_ENV_SIZE)
#error CONFIG_ENV_OFFSET or CONFIG_ENV_SIZE not defined
#endif
__weak int sata_get_env_dev(void)
{
return CONFIG_SYS_SATA_ENV_DEV;
}
#ifdef CONFIG_CMD_SAVEENV
static inline int write_env(struct blk_desc *sata, unsigned long size,
unsigned long offset, void *buffer)
{
uint blk_start, blk_cnt, n;
blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
return (n == blk_cnt) ? 0 : -1;
}
static int env_sata_save(void)
{
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
struct blk_desc *sata = NULL;
int env_sata, ret;
if (sata_initialize())
return 1;
env_sata = sata_get_env_dev();
sata = sata_get_dev(env_sata);
if (sata == NULL) {
printf("Unknown SATA(%d) device for environment!\n",
env_sata);
return 1;
}
ret = env_export(env_new);
if (ret)
return 1;
printf("Writing to SATA(%d)...", env_sata);
if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, (u_char *)env_new)) {
puts("failed\n");
return 1;
}
puts("done\n");
return 0;
}
#endif /* CONFIG_CMD_SAVEENV */
static inline int read_env(struct blk_desc *sata, unsigned long size,
unsigned long offset, void *buffer)
{
uint blk_start, blk_cnt, n;
blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
n = blk_dread(sata, blk_start, blk_cnt, buffer);
return (n == blk_cnt) ? 0 : -1;
}
static void env_sata_load(void)
{
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
struct blk_desc *sata = NULL;
int env_sata;
if (sata_initialize())
return -EIO;
env_sata = sata_get_env_dev();
sata = sata_get_dev(env_sata);
if (sata == NULL) {
printf("Unknown SATA(%d) device for environment!\n", env_sata);
return -EIO;
}
if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) {
set_default_env(NULL, 0);
return -EIO;
}
return env_import(buf, 1);
}
U_BOOT_ENV_LOCATION(sata) = {
.location = ENVL_ESATA,
ENV_NAME("SATA")
.load = env_sata_load,
.save = env_save_ptr(env_sata_save),
};
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