drivers/mmc: send CMD8 only for SD card in initialization
Sending CMD8 before CMD1 just causes to fetch data failure in eMMC.
Check whether it's eMMC first. If it's eMMC, send CMD1 command instead.
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 0c9ec10..c8eac26 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -363,8 +363,6 @@
{
int ret;
- mdelay(1);
-
/* CMD0: reset to IDLE */
ret = mmc_send_cmd(MMC_CMD(0), 0, 0, NULL);
if (ret != 0) {
@@ -413,14 +411,16 @@
mmc_reset_to_idle();
- /* CMD8: Send Interface Condition Command */
- ret = mmc_send_cmd(MMC_CMD(8), VHS_2_7_3_6_V | CMD8_CHECK_PATTERN,
- MMC_RESPONSE_R(7), &resp_data[0]);
-
- if ((ret == 0) && ((resp_data[0] & 0xffU) == CMD8_CHECK_PATTERN)) {
- ret = sd_send_op_cond();
- } else {
+ if (mmc_dev_info->mmc_dev_type == MMC_IS_EMMC) {
ret = mmc_send_op_cond();
+ } else {
+ /* CMD8: Send Interface Condition Command */
+ ret = mmc_send_cmd(MMC_CMD(8), VHS_2_7_3_6_V | CMD8_CHECK_PATTERN,
+ MMC_RESPONSE_R(7), &resp_data[0]);
+
+ if ((ret == 0) && ((resp_data[0] & 0xffU) == CMD8_CHECK_PATTERN)) {
+ ret = sd_send_op_cond();
+ }
}
if (ret != 0) {
return ret;