Signed-off-by: Frank Wunderlich frank-w@public-files.de --- env/mmc.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/env/mmc.c b/env/mmc.c index c3cf35d01b..f387a53970 100644 --- a/env/mmc.c +++ b/env/mmc.c @@ -242,6 +242,33 @@ fini: fini_mmc_for_env(mmc); return ret; } + +static int env_mmc_erase(void) +{ + int dev = mmc_get_env_dev(); + struct mmc *mmc = find_mmc_device(dev); + int n, blk, cnt; + + if (!mmc) + return CMD_RET_FAILURE; + + blk = CONFIG_ENV_OFFSET / mmc->read_bl_len; + cnt = CONFIG_ENV_SIZE / mmc->read_bl_len; + + printf("\nMMC erase env: dev # %d, block # %d (0x%x), count %d (0x%x)\n", + dev, blk, blk * mmc->read_bl_len, + cnt, cnt * mmc->read_bl_len); + + if (mmc_getwp(mmc) == 1) { + printf("Error: card is write protected!\n"); + return CMD_RET_FAILURE; + } + n = blk_derase(mmc_get_blk_desc(mmc), blk, cnt); + printf("%d blocks erased: %s\n", n, (n == cnt) ? "OK" : "ERROR"); + + return (n == cnt) ? CMD_RET_SUCCESS : CMD_RET_FAILURE; +} + #endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
static inline int read_env(struct mmc *mmc, unsigned long size, @@ -351,5 +378,6 @@ U_BOOT_ENV_LOCATION(mmc) = { .load = env_mmc_load, #ifndef CONFIG_SPL_BUILD .save = env_save_ptr(env_mmc_save), + .erase = env_mmc_erase, #endif }; -- 2.17.1