diff options
Diffstat (limited to 'roms/u-boot/env/fat.c')
| -rw-r--r-- | roms/u-boot/env/fat.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/roms/u-boot/env/fat.c b/roms/u-boot/env/fat.c new file mode 100644 index 000000000..9d37d26f9 --- /dev/null +++ b/roms/u-boot/env/fat.c @@ -0,0 +1,178 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (c) Copyright 2011 by Tigris Elektronik GmbH + * + * Author: + * Maximilian Schwerin <mvs@tigris.de> + */ + +#include <common.h> +#include <command.h> +#include <env.h> +#include <env_internal.h> +#include <part.h> +#include <malloc.h> +#include <memalign.h> +#include <search.h> +#include <errno.h> +#include <fat.h> +#include <mmc.h> +#include <asm/cache.h> +#include <asm/global_data.h> +#include <linux/stddef.h> + +#ifdef CONFIG_SPL_BUILD +/* TODO(sjg@chromium.org): Figure out why this is needed */ +# if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT) +# define LOADENV +# endif +#else +# define LOADENV +#endif + +DECLARE_GLOBAL_DATA_PTR; + +static char *env_fat_device_and_part(void) +{ +#ifdef CONFIG_MMC + static char *part_str; + + if (!part_str) { + part_str = CONFIG_ENV_FAT_DEVICE_AND_PART; + if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc") && part_str[0] == ':') { + part_str = "0" CONFIG_ENV_FAT_DEVICE_AND_PART; + part_str[0] += mmc_get_env_dev(); + } + } + + return part_str; +#else + return CONFIG_ENV_FAT_DEVICE_AND_PART; +#endif +} + +static int env_fat_save(void) +{ + env_t __aligned(ARCH_DMA_MINALIGN) env_new; + struct blk_desc *dev_desc = NULL; + struct disk_partition info; + const char *file = CONFIG_ENV_FAT_FILE; + int dev, part; + int err; + loff_t size; + + err = env_export(&env_new); + if (err) + return err; + + part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE, + env_fat_device_and_part(), + &dev_desc, &info, 1); + if (part < 0) + return 1; + + dev = dev_desc->devnum; + if (fat_set_blk_dev(dev_desc, &info) != 0) { + /* + * This printf is embedded in the messages from env_save that + * will calling it. The missing \n is intentional. + */ + printf("Unable to use %s %d:%d... ", + CONFIG_ENV_FAT_INTERFACE, dev, part); + return 1; + } + +#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT + if (gd->env_valid == ENV_VALID) + file = CONFIG_ENV_FAT_FILE_REDUND; +#endif + + err = file_fat_write(file, (void *)&env_new, 0, sizeof(env_t), &size); + if (err == -1) { + /* + * This printf is embedded in the messages from env_save that + * will calling it. The missing \n is intentional. + */ + printf("Unable to write \"%s\" from %s%d:%d... ", + file, CONFIG_ENV_FAT_INTERFACE, dev, part); + return 1; + } + +#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT + gd->env_valid = (gd->env_valid == ENV_REDUND) ? ENV_VALID : ENV_REDUND; +#endif + + return 0; +} + +#ifdef LOADENV +static int env_fat_load(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(char, buf1, CONFIG_ENV_SIZE); +#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT + ALLOC_CACHE_ALIGN_BUFFER(char, buf2, CONFIG_ENV_SIZE); + int err2; +#endif + struct blk_desc *dev_desc = NULL; + struct disk_partition info; + int dev, part; + int err1; + +#ifdef CONFIG_MMC + if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc")) + mmc_initialize(NULL); +#endif + + part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE, + env_fat_device_and_part(), + &dev_desc, &info, 1); + if (part < 0) + goto err_env_relocate; + + dev = dev_desc->devnum; + if (fat_set_blk_dev(dev_desc, &info) != 0) { + /* + * This printf is embedded in the messages from env_save that + * will calling it. The missing \n is intentional. + */ + printf("Unable to use %s %d:%d... ", + CONFIG_ENV_FAT_INTERFACE, dev, part); + goto err_env_relocate; + } + + err1 = file_fat_read(CONFIG_ENV_FAT_FILE, buf1, CONFIG_ENV_SIZE); +#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT + err2 = file_fat_read(CONFIG_ENV_FAT_FILE_REDUND, buf2, CONFIG_ENV_SIZE); + + err1 = (err1 >= 0) ? 0 : -1; + err2 = (err2 >= 0) ? 0 : -1; + return env_import_redund(buf1, err1, buf2, err2, H_EXTERNAL); +#else + if (err1 < 0) { + /* + * This printf is embedded in the messages from env_save that + * will calling it. The missing \n is intentional. + */ + printf("Unable to read \"%s\" from %s%d:%d... ", + CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part); + goto err_env_relocate; + } + + return env_import(buf1, 1, H_EXTERNAL); +#endif + +err_env_relocate: + env_set_default(NULL, 0); + + return -EIO; +} +#endif /* LOADENV */ + +U_BOOT_ENV_LOCATION(fat) = { + .location = ENVL_FAT, + ENV_NAME("FAT") +#ifdef LOADENV + .load = env_fat_load, +#endif + .save = ENV_SAVE_PTR(env_fat_save), +}; |