diff options
Diffstat (limited to 'env')
| -rw-r--r-- | env/Kconfig | 8 | ||||
| -rw-r--r-- | env/common.c | 42 | ||||
| -rw-r--r-- | env/sf.c | 100 |
3 files changed, 137 insertions, 13 deletions
diff --git a/env/Kconfig b/env/Kconfig index aa63fae021e..67ce93061b7 100644 --- a/env/Kconfig +++ b/env/Kconfig @@ -376,6 +376,14 @@ config ENV_SPI_MODE Value of the SPI work mode for environment. See include/spi.h for value. +config ENV_SPI_EARLY + bool "Access Environment in SPI flashes before relocation" + depends on ENV_IS_IN_SPI_FLASH + help + Enable this if you want to use Environment in SPI flash + before relocation. Call env_init() and than you can use + env_get_f() for accessing Environment variables. + config ENV_IS_IN_UBI bool "Environment in a UBI volume" depends on !CHAIN_OF_TRUST diff --git a/env/common.c b/env/common.c index ed18378000f..6c32a9b4796 100644 --- a/env/common.c +++ b/env/common.c @@ -141,12 +141,11 @@ int env_import(const char *buf, int check, int flags) #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT static unsigned char env_flags; -int env_import_redund(const char *buf1, int buf1_read_fail, - const char *buf2, int buf2_read_fail, - int flags) +int env_check_redund(const char *buf1, int buf1_read_fail, + const char *buf2, int buf2_read_fail) { int crc1_ok, crc2_ok; - env_t *ep, *tmp_env1, *tmp_env2; + env_t *tmp_env1, *tmp_env2; tmp_env1 = (env_t *)buf1; tmp_env2 = (env_t *)buf2; @@ -159,14 +158,13 @@ int env_import_redund(const char *buf1, int buf1_read_fail, } if (buf1_read_fail && buf2_read_fail) { - env_set_default("bad env area", 0); return -EIO; } else if (!buf1_read_fail && buf2_read_fail) { gd->env_valid = ENV_VALID; - return env_import((char *)tmp_env1, 1, flags); + return -EINVAL; } else if (buf1_read_fail && !buf2_read_fail) { gd->env_valid = ENV_REDUND; - return env_import((char *)tmp_env2, 1, flags); + return -ENOENT; } crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == @@ -175,7 +173,6 @@ int env_import_redund(const char *buf1, int buf1_read_fail, tmp_env2->crc; if (!crc1_ok && !crc2_ok) { - env_set_default("bad CRC", 0); return -ENOMSG; /* needed for env_load() */ } else if (crc1_ok && !crc2_ok) { gd->env_valid = ENV_VALID; @@ -195,12 +192,37 @@ int env_import_redund(const char *buf1, int buf1_read_fail, gd->env_valid = ENV_VALID; } + return 0; +} + +int env_import_redund(const char *buf1, int buf1_read_fail, + const char *buf2, int buf2_read_fail, + int flags) +{ + env_t *ep; + int ret; + + ret = env_check_redund(buf1, buf1_read_fail, buf2, buf2_read_fail); + + if (ret == -EIO) { + env_set_default("bad env area", 0); + return -EIO; + } else if (ret == -EINVAL) { + return env_import((char *)buf1, 1, flags); + } else if (ret == -ENOENT) { + return env_import((char *)buf2, 1, flags); + } else if (ret == -ENOMSG) { + env_set_default("bad CRC", 0); + return -ENOMSG; + } + if (gd->env_valid == ENV_VALID) - ep = tmp_env1; + ep = (env_t *)buf1; else - ep = tmp_env2; + ep = (env_t *)buf2; env_flags = ep->flags; + return env_import((char *)ep, 0, flags); } #endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */ @@ -287,7 +287,10 @@ __weak void *env_sf_get_env_addr(void) #endif #if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0) -static int env_sf_init(void) +/* + * check if Environment on CONFIG_ENV_ADDR is valid. + */ +static int env_sf_init_addr(void) { env_t *env_ptr = (env_t *)env_sf_get_env_addr(); @@ -303,12 +306,103 @@ static int env_sf_init(void) } #endif +#if defined(CONFIG_ENV_SPI_EARLY) +/* + * early load environment from SPI flash (before relocation) + * and check if it is valid. + */ +static int env_sf_init_early(void) +{ + int ret; + int read1_fail; + int read2_fail; + int crc1_ok; + env_t *tmp_env2 = NULL; + env_t *tmp_env1; + + /* + * if malloc is not ready yet, we cannot use + * this part yet. + */ + if (!gd->malloc_limit) + return -ENOENT; + + tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN, + CONFIG_ENV_SIZE); + if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) + tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN, + CONFIG_ENV_SIZE); + + if (!tmp_env1 || !tmp_env2) + goto out; + + ret = setup_flash_device(); + if (ret) + goto out; + + read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET, + CONFIG_ENV_SIZE, tmp_env1); + + if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) { + read2_fail = spi_flash_read(env_flash, + CONFIG_ENV_OFFSET_REDUND, + CONFIG_ENV_SIZE, tmp_env2); + ret = env_check_redund((char *)tmp_env1, read1_fail, + (char *)tmp_env2, read2_fail); + + if (ret == -EIO || ret == -ENOMSG) + goto err_read; + + if (gd->env_valid == ENV_VALID) + gd->env_addr = (unsigned long)&tmp_env1->data; + else + gd->env_addr = (unsigned long)&tmp_env2->data; + } else { + if (read1_fail) + goto err_read; + + crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == + tmp_env1->crc; + if (!crc1_ok) + goto err_read; + + /* if valid -> this is our env */ + gd->env_valid = ENV_VALID; + gd->env_addr = (unsigned long)&tmp_env1->data; + } + + return 0; +err_read: + spi_flash_free(env_flash); + env_flash = NULL; + free(tmp_env1); + if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) + free(tmp_env2); +out: + /* env is not valid. always return 0 */ + gd->env_valid = ENV_INVALID; + return 0; +} +#endif + +static int env_sf_init(void) +{ +#if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0) + return env_sf_init_addr(); +#elif defined(CONFIG_ENV_SPI_EARLY) + return env_sf_init_early(); +#endif + /* + * we must return with 0 if there is nothing done, + * else env_set_inited() get not called in env_init() + */ + return 0; +} + U_BOOT_ENV_LOCATION(sf) = { .location = ENVL_SPI_FLASH, ENV_NAME("SPIFlash") .load = env_sf_load, .save = CONFIG_IS_ENABLED(SAVEENV) ? ENV_SAVE_PTR(env_sf_save) : NULL, -#if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0) .init = env_sf_init, -#endif }; |