Signed-off-by: Frank Wunderlich frank-w@public-files.de --- env/mmc.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/env/mmc.c b/env/mmc.c index c5b6356363..f387a53970 100644 --- a/env/mmc.c +++ b/env/mmc.c @@ -245,7 +245,28 @@ fini:
static int env_mmc_erase(void) { - return 0;//1 on error + 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 */ -- 2.17.1