this adds erase environment for mmc storage
squashed fixes: - add CONFIG_CMD_ERASEENV - env: erase redundant offset if defined - changes mentioned by Simon
Suggested-by: Simon Goldschmidt simon.k.r.goldschmidt@gmail.com Signed-off-by: Frank Wunderlich frank-w@public-files.de --- env/mmc.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+)
diff --git a/env/mmc.c b/env/mmc.c index c3cf35d01b..1067d1d122 100644 --- a/env/mmc.c +++ b/env/mmc.c @@ -242,6 +242,54 @@ fini: fini_mmc_for_env(mmc); return ret; } + +#if defined(CONFIG_CMD_ERASEENV) +static inline int erase_env(struct mmc *mmc, unsigned long size, + unsigned long offset) +{ + uint blk_start, blk_cnt, n; + struct blk_desc *desc = mmc_get_blk_desc(mmc); + + blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len; + blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len; + + n = blk_derase(desc, blk_start, blk_cnt); + printf("%d blocks erased: %s\n", n, (n == blk_cnt) ? "OK" : "ERROR"); + + return (n == blk_cnt) ? 0 : 1; +} + +static int env_mmc_erase(void) +{ + int dev = mmc_get_env_dev(); + struct mmc *mmc = find_mmc_device(dev); + int ret, copy = 0; + u32 offset; + const char *errmsg; + + errmsg = init_mmc_for_env(mmc); + if (errmsg) { + printf("%s\n", errmsg); + return 1; + } + + if (mmc_get_env_addr(mmc, copy, &offset)) + return CMD_RET_FAILURE; + + ret = erase_env(mmc, CONFIG_ENV_SIZE, offset); + +#ifdef CONFIG_ENV_OFFSET_REDUND + copy = 1; + + if (mmc_get_env_addr(mmc, copy, &offset)) + return CMD_RET_FAILURE; + + ret |= erase_env(mmc, CONFIG_ENV_SIZE, offset); +#endif + + return ret; +} +#endif /* CONFIG_CMD_ERASEENV */ #endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
static inline int read_env(struct mmc *mmc, unsigned long size, @@ -351,5 +399,8 @@ U_BOOT_ENV_LOCATION(mmc) = { .load = env_mmc_load, #ifndef CONFIG_SPL_BUILD .save = env_save_ptr(env_mmc_save), +#if defined(CONFIG_CMD_ERASEENV) + .erase = env_mmc_erase, +#endif #endif }; -- 2.17.1