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8bf3e967f6
Allow SCSI to be able to store environment variables. Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com> Acked-by: Casey Connolly <casey.connolly@linaro.org>
116 lines
2.2 KiB
C
116 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
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*/
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/* #define DEBUG */
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#include <asm/global_data.h>
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#include <command.h>
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#include <env.h>
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#include <env_internal.h>
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#include <fdtdec.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <memalign.h>
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#include <part.h>
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#include <search.h>
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#include <scsi.h>
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#include <errno.h>
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#include <dm/ofnode.h>
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DECLARE_GLOBAL_DATA_PTR;
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static env_t envbuf;
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struct env_scsi_info {
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struct blk_desc *blk;
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struct disk_partition part;
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int count;
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};
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static struct env_scsi_info env_part;
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static inline struct env_scsi_info *env_scsi_get_part(void)
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{
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struct env_scsi_info *ep = &env_part;
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if (scsi_get_blk_by_uuid(CONFIG_SCSI_ENV_PART_UUID, &ep->blk, &ep->part))
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return NULL;
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ep->count = CONFIG_ENV_SIZE / ep->part.blksz;
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return ep;
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}
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static int env_scsi_save(void)
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{
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struct env_scsi_info *ep = env_scsi_get_part();
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int ret;
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if (!ep)
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return -ENOENT;
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ret = env_export(&envbuf);
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if (ret)
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return ret;
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if (blk_dwrite(ep->blk, ep->part.start, ep->count, &envbuf) != ep->count)
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return -EIO;
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return 0;
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}
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static int env_scsi_erase(void)
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{
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struct env_scsi_info *ep = env_scsi_get_part();
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if (!ep)
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return -ENOENT;
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return (int)blk_derase(ep->blk, ep->part.start, ep->count);
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}
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#if defined(ENV_IS_EMBEDDED)
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static int env_scsi_load(void)
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{
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return 0;
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}
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#else
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static int env_scsi_load(void)
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{
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struct env_scsi_info *ep = env_scsi_get_part();
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int ret;
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if (!ep) {
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env_set_default(CONFIG_SCSI_ENV_PART_UUID " partition not found", 0);
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return -ENOENT;
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}
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if (blk_dread(ep->blk, ep->part.start, ep->count, &envbuf) != ep->count) {
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env_set_default(CONFIG_SCSI_ENV_PART_UUID " partition read failed", 0);
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return -EIO;
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}
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ret = env_import((char *)&envbuf, 1, H_EXTERNAL);
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if (ret) {
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debug("ENV import failed\n");
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env_set_default("Cannot load environment", 0);
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} else {
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gd->env_addr = (ulong)envbuf.data;
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}
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return ret;
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}
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#endif
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U_BOOT_ENV_LOCATION(scsi) = {
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.location = ENVL_SCSI,
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ENV_NAME("SCSI")
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.load = env_scsi_load,
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#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_XPL_BUILD)
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.save = env_save_ptr(env_scsi_save),
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.erase = ENV_ERASE_PTR(env_scsi_erase),
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#endif
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};
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