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env/ubi.c
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/* * (c) Copyright 2012 by National Instruments, * Joe Hershberger <joe.hershberger@ni.com> * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <command.h> #include <environment.h> #include <errno.h> #include <malloc.h> #include <memalign.h> #include <search.h> #include <ubi_uboot.h> #undef crc32 DECLARE_GLOBAL_DATA_PTR; #ifdef CONFIG_CMD_SAVEENV #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT static int env_ubi_save(void) { ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1); int ret; ret = env_export(env_new); if (ret) return ret; if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { printf(" ** Cannot find mtd partition \"%s\" ", CONFIG_ENV_UBI_PART); return 1; } if (gd->env_valid == ENV_VALID) { puts("Writing to redundant UBI... "); if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME_REDUND, (void *)env_new, CONFIG_ENV_SIZE)) { printf(" ** Unable to write env to %s:%s ** ", CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND); return 1; } } else { puts("Writing to UBI... "); if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, (void *)env_new, CONFIG_ENV_SIZE)) { printf(" ** Unable to write env to %s:%s ** ", CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME); return 1; } } puts("done "); gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND; return 0; } #else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */ static int env_ubi_save(void) { ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1); int ret; ret = env_export(env_new); if (ret) return ret; if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { printf(" ** Cannot find mtd partition \"%s\" ", CONFIG_ENV_UBI_PART); return 1; } if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, (void *)env_new, CONFIG_ENV_SIZE)) { printf(" ** Unable to write env to %s:%s ** ", CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME); return 1; } puts("done "); return 0; } #endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */ #endif /* CONFIG_CMD_SAVEENV */ #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT static int env_ubi_load(void) { ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf, CONFIG_ENV_SIZE); ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf, CONFIG_ENV_SIZE); int read1_fail, read2_fail; env_t *tmp_env1, *tmp_env2; /* * In case we have restarted u-boot there is a chance that buffer * contains old environment (from the previous boot). * If UBI volume is zero size, ubi_volume_read() doesn't modify the * buffer. * We need to clear buffer manually here, so the invalid CRC will * cause setting default environment as expected. */ memset(env1_buf, 0x0, CONFIG_ENV_SIZE); memset(env2_buf, 0x0, CONFIG_ENV_SIZE); tmp_env1 = (env_t *)env1_buf; tmp_env2 = (env_t *)env2_buf; if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { printf(" ** Cannot find mtd partition \"%s\" ", CONFIG_ENV_UBI_PART); set_default_env(NULL); return -EIO; } read1_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1, CONFIG_ENV_SIZE); if (read1_fail) printf(" ** Unable to read env from %s:%s ** ", CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME); read2_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND, (void *)tmp_env2, CONFIG_ENV_SIZE); if (read2_fail) printf(" ** Unable to read redundant env from %s:%s ** ", CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND); return env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2, read2_fail); } #else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */ static int env_ubi_load(void) { ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); /* * In case we have restarted u-boot there is a chance that buffer * contains old environment (from the previous boot). * If UBI volume is zero size, ubi_volume_read() doesn't modify the * buffer. * We need to clear buffer manually here, so the invalid CRC will * cause setting default environment as expected. */ memset(buf, 0x0, CONFIG_ENV_SIZE); if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) { printf(" ** Cannot find mtd partition \"%s\" ", CONFIG_ENV_UBI_PART); set_default_env(NULL); return -EIO; } if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, buf, CONFIG_ENV_SIZE)) { printf(" ** Unable to read env from %s:%s ** ", CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME); set_default_env(NULL); return -EIO; } return env_import(buf, 1); } #endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */ U_BOOT_ENV_LOCATION(ubi) = { .location = ENVL_UBI, .load = env_ubi_load, .save = env_save_ptr(env_ubi_save), }; |