diff options
Diffstat (limited to 'common/env_fat.c')
| -rw-r--r-- | common/env_fat.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/common/env_fat.c b/common/env_fat.c new file mode 100644 index 0000000..bad92aa --- /dev/null +++ b/common/env_fat.c @@ -0,0 +1,156 @@ +/* + * (c) Copyright 2011 by Tigris Elektronik GmbH + * + * Author: + * Maximilian Schwerin <mvs@tigris.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> + +#include <command.h> +#include <environment.h> +#include <linux/stddef.h> +#include <malloc.h> +#include <search.h> +#include <errno.h> +#include <fat.h> +#include <mmc.h> + +char *env_name_spec = "FAT"; + +env_t *env_ptr; + +DECLARE_GLOBAL_DATA_PTR; + +uchar env_get_char_spec(int index) +{ + return *((uchar *)(gd->env_addr + index)); +} + +int env_init(void) +{ + /* use default */ + gd->env_addr = (ulong)&default_environment[0]; + gd->env_valid = 1; + + return 0; +} + +#ifdef CONFIG_CMD_SAVEENV +int saveenv(void) +{ + env_t env_new; + ssize_t len; + char *res; + block_dev_desc_t *dev_desc = NULL; + int dev = FAT_ENV_DEVICE; + int part = FAT_ENV_PART; + + res = (char *)&env_new.data; + len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL); + if (len < 0) { + error("Cannot export environment: errno = %d\n", errno); + return 1; + } + +#ifdef CONFIG_MMC + if (strcmp (FAT_ENV_INTERFACE, "mmc") == 0) { + struct mmc *mmc = find_mmc_device(dev); + + if (!mmc) { + printf("no mmc device at slot %x\n", dev); + return 1; + } + + mmc->has_init = 0; + mmc_init(mmc); + } +#endif /* CONFIG_MMC */ + + dev_desc = get_dev(FAT_ENV_INTERFACE, dev); + if (dev_desc == NULL) { + printf("Failed to find %s%d\n", + FAT_ENV_INTERFACE, dev); + return 1; + } + if (fat_register_device(dev_desc, part) != 0) { + printf("Failed to register %s%d:%d\n", + FAT_ENV_INTERFACE, dev, part); + return 1; + } + + env_new.crc = crc32(0, env_new.data, ENV_SIZE); + if (file_fat_write(FAT_ENV_FILE, (void *)&env_new, sizeof(env_t)) == -1) { + printf("\n** Unable to write \"%s\" from %s%d:%d **\n", + FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part); + return 1; + } + + puts("done\n"); + return 0; +} +#endif /* CONFIG_CMD_SAVEENV */ + +void env_relocate_spec(void) +{ + char buf[CONFIG_ENV_SIZE]; + block_dev_desc_t *dev_desc = NULL; + int dev = FAT_ENV_DEVICE; + int part = FAT_ENV_PART; + +#ifdef CONFIG_MMC + if (strcmp (FAT_ENV_INTERFACE, "mmc") == 0) { + struct mmc *mmc = find_mmc_device(dev); + + if (!mmc) { + printf("no mmc device at slot %x\n", dev); + set_default_env(NULL); + return; + } + + mmc->has_init = 0; + mmc_init(mmc); + } +#endif /* CONFIG_MMC */ + + dev_desc = get_dev(FAT_ENV_INTERFACE, dev); + if (dev_desc == NULL) { + printf("Failed to find %s%d\n", + FAT_ENV_INTERFACE, dev); + set_default_env(NULL); + return; + } + if (fat_register_device(dev_desc, part) != 0) { + printf("Failed to register %s%d:%d\n", + FAT_ENV_INTERFACE, dev, part); + set_default_env(NULL); + return; + } + + if (file_fat_read(FAT_ENV_FILE, (unsigned char *)&buf, CONFIG_ENV_SIZE) == -1) { + printf("\n** Unable to read \"%s\" from %s%d:%d **\n", + FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part); + set_default_env(NULL); + return; + } + + env_import(buf, 1); +} |