diff options
Diffstat (limited to 'roms/u-boot/env/ext4.c')
| -rw-r--r-- | roms/u-boot/env/ext4.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/roms/u-boot/env/ext4.c b/roms/u-boot/env/ext4.c new file mode 100644 index 000000000..9f65afb8a --- /dev/null +++ b/roms/u-boot/env/ext4.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (c) Copyright 2016 by VRT Technology + * + * Author: + * Stuart Longland <stuartl@vrt.com.au> + * + * Based on FAT environment driver + * (c) Copyright 2011 by Tigris Elektronik GmbH + * + * Author: + * Maximilian Schwerin <mvs@tigris.de> + * + * and EXT4 filesystem implementation + * (C) Copyright 2011 - 2012 Samsung Electronics + * EXT4 filesystem implementation in Uboot by + * Uma Shankar <uma.shankar@samsung.com> + * Manjunatha C Achar <a.manjunatha@samsung.com> + */ + +#include <common.h> +#include <part.h> + +#include <command.h> +#include <env.h> +#include <env_internal.h> +#include <linux/stddef.h> +#include <malloc.h> +#include <memalign.h> +#include <search.h> +#include <errno.h> +#include <ext4fs.h> +#include <mmc.h> +#include <asm/global_data.h> + +DECLARE_GLOBAL_DATA_PTR; + +__weak const char *env_ext4_get_intf(void) +{ + return (const char *)CONFIG_ENV_EXT4_INTERFACE; +} + +__weak const char *env_ext4_get_dev_part(void) +{ +#ifdef CONFIG_MMC + static char *part_str; + + if (!part_str) { + part_str = CONFIG_ENV_EXT4_DEVICE_AND_PART; + if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc") && part_str[0] == ':') { + part_str = "0" CONFIG_ENV_EXT4_DEVICE_AND_PART; + part_str[0] += mmc_get_env_dev(); + } + } + + return part_str; +#else + return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART; +#endif +} + +static int env_ext4_save_buffer(env_t *env_new) +{ + struct blk_desc *dev_desc = NULL; + struct disk_partition info; + int dev, part; + int err; + const char *ifname = env_ext4_get_intf(); + const char *dev_and_part = env_ext4_get_dev_part(); + + part = blk_get_device_part_str(ifname, dev_and_part, + &dev_desc, &info, 1); + if (part < 0) + return 1; + + dev = dev_desc->devnum; + ext4fs_set_blk_dev(dev_desc, &info); + + if (!ext4fs_mount(info.size)) { + printf("\n** Unable to use %s %s for saveenv **\n", + ifname, dev_and_part); + return 1; + } + + err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)env_new, + sizeof(env_t), FILETYPE_REG); + ext4fs_close(); + + if (err == -1) { + printf("\n** Unable to write \"%s\" from %s%d:%d **\n", + CONFIG_ENV_EXT4_FILE, ifname, dev, part); + return 1; + } + + return 0; +} + +static int env_ext4_save(void) +{ + env_t env_new; + int err; + + err = env_export(&env_new); + if (err) + return err; + + err = env_ext4_save_buffer(&env_new); + if (err) + return err; + + gd->env_valid = ENV_VALID; + puts("done\n"); + + return 0; +} + +static int env_ext4_erase(void) +{ + env_t env_new; + int err; + + memset(&env_new, 0, sizeof(env_t)); + + err = env_ext4_save_buffer(&env_new); + if (err) + return err; + + gd->env_valid = ENV_INVALID; + puts("done\n"); + + return 0; +} + +static int env_ext4_load(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); + struct blk_desc *dev_desc = NULL; + struct disk_partition info; + int dev, part; + int err; + loff_t off; + const char *ifname = env_ext4_get_intf(); + const char *dev_and_part = env_ext4_get_dev_part(); + +#ifdef CONFIG_MMC + if (!strcmp(ifname, "mmc")) + mmc_initialize(NULL); +#endif + + part = blk_get_device_part_str(ifname, dev_and_part, + &dev_desc, &info, 1); + if (part < 0) + goto err_env_relocate; + + dev = dev_desc->devnum; + ext4fs_set_blk_dev(dev_desc, &info); + + if (!ext4fs_mount(info.size)) { + printf("\n** Unable to use %s %s for loading the env **\n", + ifname, dev_and_part); + goto err_env_relocate; + } + + err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE, + &off); + ext4fs_close(); + + if (err == -1) { + printf("\n** Unable to read \"%s\" from %s%d:%d **\n", + CONFIG_ENV_EXT4_FILE, ifname, dev, part); + goto err_env_relocate; + } + + err = env_import(buf, 1, H_EXTERNAL); + if (!err) + gd->env_valid = ENV_VALID; + + return err; + +err_env_relocate: + env_set_default(NULL, 0); + + return -EIO; +} + +U_BOOT_ENV_LOCATION(ext4) = { + .location = ENVL_EXT4, + ENV_NAME("EXT4") + .load = env_ext4_load, + .save = ENV_SAVE_PTR(env_ext4_save), + .erase = ENV_ERASE_PTR(env_ext4_erase), +}; |