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https://github.com/u-boot/u-boot.git
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144 lines
2.7 KiB
C
144 lines
2.7 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 <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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char *env_name_spec = "FAT";
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env_t *env_ptr;
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DECLARE_GLOBAL_DATA_PTR;
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int env_init(void)
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{
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/* use default */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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return 0;
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}
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#ifdef CONFIG_CMD_SAVEENV
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int saveenv(void)
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{
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env_t env_new;
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ssize_t len;
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char *res;
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block_dev_desc_t *dev_desc = NULL;
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int dev = FAT_ENV_DEVICE;
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int part = FAT_ENV_PART;
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int err;
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res = (char *)&env_new.data;
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len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
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if (len < 0) {
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error("Cannot export environment: errno = %d\n", errno);
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return 1;
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}
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#ifdef CONFIG_MMC
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if (strcmp(FAT_ENV_INTERFACE, "mmc") == 0) {
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struct mmc *mmc = find_mmc_device(dev);
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if (!mmc) {
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printf("no mmc device at slot %x\n", dev);
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return 1;
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}
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mmc->has_init = 0;
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mmc_init(mmc);
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}
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#endif /* CONFIG_MMC */
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dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
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if (dev_desc == NULL) {
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printf("Failed to find %s%d\n",
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FAT_ENV_INTERFACE, dev);
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return 1;
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}
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err = fat_register_device(dev_desc, part);
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if (err) {
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printf("Failed to register %s%d:%d\n",
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FAT_ENV_INTERFACE, dev, part);
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return 1;
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}
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env_new.crc = crc32(0, env_new.data, ENV_SIZE);
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err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, sizeof(env_t));
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if (err == -1) {
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printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
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FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
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return 1;
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}
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puts("done\n");
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return 0;
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}
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#endif /* CONFIG_CMD_SAVEENV */
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void env_relocate_spec(void)
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{
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char buf[CONFIG_ENV_SIZE];
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block_dev_desc_t *dev_desc = NULL;
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int dev = FAT_ENV_DEVICE;
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int part = FAT_ENV_PART;
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int err;
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#ifdef CONFIG_MMC
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if (strcmp(FAT_ENV_INTERFACE, "mmc") == 0) {
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struct mmc *mmc = find_mmc_device(dev);
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if (!mmc) {
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printf("no mmc device at slot %x\n", dev);
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set_default_env(NULL);
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return;
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}
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mmc->has_init = 0;
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mmc_init(mmc);
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}
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#endif /* CONFIG_MMC */
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dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
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if (dev_desc == NULL) {
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printf("Failed to find %s%d\n",
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FAT_ENV_INTERFACE, dev);
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set_default_env(NULL);
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return;
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}
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err = fat_register_device(dev_desc, part);
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if (err) {
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printf("Failed to register %s%d:%d\n",
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FAT_ENV_INTERFACE, dev, part);
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set_default_env(NULL);
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return;
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}
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err = file_fat_read(FAT_ENV_FILE, (uchar *)&buf, CONFIG_ENV_SIZE);
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if (err == -1) {
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printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
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FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
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set_default_env(NULL);
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return;
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}
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env_import(buf, 1);
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}
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