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https://github.com/brain-hackers/u-boot-brain
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c595199194
The load() methods have inconsistent behaviour on error. Some of them load an empty default environment. Some load an environment containing an error message. Others do nothing. As a step in the right direction, have the method return an error code. Then the caller could handle this itself in a consistent way. Signed-off-by: Simon Glass <sjg@chromium.org>
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
/*
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* (C) Copyright 2010 DENX Software Engineering
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* Wolfgang Denk <wd@denx.de>
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*
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* (C) Copyright 2005-2009 Samsung Electronics
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* Kyungmin Park <kyungmin.park@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <search.h>
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#include <errno.h>
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#include <onenand_uboot.h>
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#include <linux/compat.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/onenand.h>
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#define ONENAND_MAX_ENV_SIZE CONFIG_ENV_SIZE
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#define ONENAND_ENV_SIZE(mtd) (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE)
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DECLARE_GLOBAL_DATA_PTR;
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static int env_onenand_load(void)
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{
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struct mtd_info *mtd = &onenand_mtd;
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#ifdef CONFIG_ENV_ADDR_FLEX
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struct onenand_chip *this = &onenand_chip;
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#endif
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int rc;
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size_t retlen;
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#ifdef ENV_IS_EMBEDDED
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char *buf = (char *)&environment;
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#else
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loff_t env_addr = CONFIG_ENV_ADDR;
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char onenand_env[ONENAND_MAX_ENV_SIZE];
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char *buf = (char *)&onenand_env[0];
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#endif /* ENV_IS_EMBEDDED */
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#ifndef ENV_IS_EMBEDDED
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# ifdef CONFIG_ENV_ADDR_FLEX
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if (FLEXONENAND(this))
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env_addr = CONFIG_ENV_ADDR_FLEX;
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# endif
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/* Check OneNAND exist */
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if (mtd->writesize)
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/* Ignore read fail */
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mtd_read(mtd, env_addr, ONENAND_MAX_ENV_SIZE,
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&retlen, (u_char *)buf);
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else
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mtd->writesize = MAX_ONENAND_PAGESIZE;
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#endif /* !ENV_IS_EMBEDDED */
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rc = env_import(buf, 1);
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if (rc)
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gd->env_valid = ENV_VALID;
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return rc ? 0 : -EIO;
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}
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static int env_onenand_save(void)
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{
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env_t env_new;
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int ret;
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struct mtd_info *mtd = &onenand_mtd;
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#ifdef CONFIG_ENV_ADDR_FLEX
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struct onenand_chip *this = &onenand_chip;
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#endif
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loff_t env_addr = CONFIG_ENV_ADDR;
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size_t retlen;
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struct erase_info instr = {
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.callback = NULL,
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};
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ret = env_export(&env_new);
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if (ret)
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return ret;
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instr.len = CONFIG_ENV_SIZE;
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#ifdef CONFIG_ENV_ADDR_FLEX
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if (FLEXONENAND(this)) {
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env_addr = CONFIG_ENV_ADDR_FLEX;
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instr.len = CONFIG_ENV_SIZE_FLEX;
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instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ?
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1 : 0;
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}
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#endif
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instr.addr = env_addr;
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instr.mtd = mtd;
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if (mtd_erase(mtd, &instr)) {
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printf("OneNAND: erase failed at 0x%08llx\n", env_addr);
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return 1;
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}
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if (mtd_write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen,
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(u_char *)&env_new)) {
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printf("OneNAND: write failed at 0x%llx\n", instr.addr);
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return 2;
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}
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return 0;
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}
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U_BOOT_ENV_LOCATION(onenand) = {
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.location = ENVL_ONENAND,
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ENV_NAME("OneNAND")
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.load = env_onenand_load,
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.save = env_save_ptr(env_onenand_save),
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};
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