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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
*/
/* #define DEBUG */
#include <asm/global_data.h>
#include <command.h>
#include <env.h>
#include <env_internal.h>
#include <fdtdec.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <memalign.h>
#include <part.h>
#include <search.h>
#include <scsi.h>
#include <errno.h>
#include <dm/ofnode.h>
DECLARE_GLOBAL_DATA_PTR;
static env_t envbuf;
struct env_scsi_info {
struct blk_desc *blk;
struct disk_partition part;
int count;
};
static struct env_scsi_info env_part;
static inline struct env_scsi_info *env_scsi_get_part(void)
{
struct env_scsi_info *ep = &env_part;
if (scsi_get_blk_by_uuid(CONFIG_SCSI_ENV_PART_UUID, &ep->blk, &ep->part))
return NULL;
ep->count = CONFIG_ENV_SIZE / ep->part.blksz;
return ep;
}
static int env_scsi_save(void)
{
struct env_scsi_info *ep = env_scsi_get_part();
int ret;
if (!ep)
return -ENOENT;
ret = env_export(&envbuf);
if (ret)
return ret;
if (blk_dwrite(ep->blk, ep->part.start, ep->count, &envbuf) != ep->count)
return -EIO;
return 0;
}
static int env_scsi_erase(void)
{
struct env_scsi_info *ep = env_scsi_get_part();
if (!ep)
return -ENOENT;
return (int)blk_derase(ep->blk, ep->part.start, ep->count);
}
#if defined(ENV_IS_EMBEDDED)
static int env_scsi_load(void)
{
return 0;
}
#else
static int env_scsi_load(void)
{
struct env_scsi_info *ep = env_scsi_get_part();
int ret;
if (!ep) {
env_set_default(CONFIG_SCSI_ENV_PART_UUID " partition not found", 0);
return -ENOENT;
}
if (blk_dread(ep->blk, ep->part.start, ep->count, &envbuf) != ep->count) {
env_set_default(CONFIG_SCSI_ENV_PART_UUID " partition read failed", 0);
return -EIO;
}
ret = env_import((char *)&envbuf, 1, H_EXTERNAL);
if (ret) {
debug("ENV import failed\n");
env_set_default("Cannot load environment", 0);
} else {
gd->env_addr = (ulong)envbuf.data;
}
return ret;
}
#endif
U_BOOT_ENV_LOCATION(scsi) = {
.location = ENVL_SCSI,
ENV_NAME("SCSI")
.load = env_scsi_load,
#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_XPL_BUILD)
.save = env_save_ptr(env_scsi_save),
.erase = ENV_ERASE_PTR(env_scsi_erase),
#endif
};
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