mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-28 13:53:44 +09:00
d024236e5a
We have a large number of places where while we historically referenced gd in the code we no longer do, as well as cases where the code added that line "just in case" during development and never dropped it. Signed-off-by: Tom Rini <trini@konsulko.com>
142 lines
3.1 KiB
C
142 lines
3.1 KiB
C
/*
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* (c) Copyright 2011 by Tigris Elektronik GmbH
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*
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* Author:
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* Maximilian Schwerin <mvs@tigris.de>
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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 <memalign.h>
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#include <search.h>
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#include <errno.h>
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#include <fat.h>
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#include <mmc.h>
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#ifdef CONFIG_SPL_BUILD
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/* TODO(sjg@chromium.org): Figure out why this is needed */
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# if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT)
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# define LOADENV
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# endif
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#else
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# define LOADENV
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# if defined(CONFIG_CMD_SAVEENV)
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# define CMD_SAVEENV
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# endif
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#endif
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#ifdef CMD_SAVEENV
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static int env_fat_save(void)
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{
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env_t __aligned(ARCH_DMA_MINALIGN) env_new;
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struct blk_desc *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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loff_t size;
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err = env_export(&env_new);
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if (err)
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return err;
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part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
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CONFIG_ENV_FAT_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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return 1;
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dev = dev_desc->devnum;
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if (fat_set_blk_dev(dev_desc, &info) != 0) {
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/*
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* This printf is embedded in the messages from env_save that
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* will calling it. The missing \n is intentional.
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*/
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printf("Unable to use %s %d:%d... ",
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CONFIG_ENV_FAT_INTERFACE, dev, part);
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return 1;
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}
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err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t),
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&size);
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if (err == -1) {
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/*
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* This printf is embedded in the messages from env_save that
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* will calling it. The missing \n is intentional.
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*/
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printf("Unable to write \"%s\" from %s%d:%d... ",
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CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
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return 1;
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}
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return 0;
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}
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#endif /* CMD_SAVEENV */
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#ifdef LOADENV
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static int env_fat_load(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
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struct blk_desc *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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#ifdef CONFIG_MMC
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if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc"))
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mmc_initialize(NULL);
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#endif
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part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
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CONFIG_ENV_FAT_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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goto err_env_relocate;
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dev = dev_desc->devnum;
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if (fat_set_blk_dev(dev_desc, &info) != 0) {
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/*
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* This printf is embedded in the messages from env_save that
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* will calling it. The missing \n is intentional.
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*/
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printf("Unable to use %s %d:%d... ",
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CONFIG_ENV_FAT_INTERFACE, dev, part);
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goto err_env_relocate;
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}
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err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE);
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if (err == -1) {
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/*
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* This printf is embedded in the messages from env_save that
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* will calling it. The missing \n is intentional.
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*/
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printf("Unable to read \"%s\" from %s%d:%d... ",
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CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
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goto err_env_relocate;
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}
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return env_import(buf, 1);
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err_env_relocate:
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set_default_env(NULL);
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return -EIO;
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}
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#endif /* LOADENV */
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U_BOOT_ENV_LOCATION(fat) = {
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.location = ENVL_FAT,
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ENV_NAME("FAT")
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#ifdef LOADENV
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.load = env_fat_load,
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#endif
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#ifdef CMD_SAVEENV
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.save = env_save_ptr(env_fat_save),
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#endif
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};
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