Signed-off-by: Frank Wunderlich <[email protected]>
---
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
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