[U-Boot] [U-BOOT][PATCH] mmc: support the revision check for eMMC4.5

[Jaehoon Chung <jh80.chung@samsung.com>]

eMMC card is introduced the eMMC4.5.
But now eMMC card is checked up to eMMC4.0.
This patch is supported until eMMC4.5

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 common/cmd_mmc.c  |    5 ++++-
 drivers/mmc/mmc.c |   25 +++++++++++++++++++++++++
 include/mmc.h     |    8 ++++++++
 3 files changed, 37 insertions(+), 1 deletions(-)

diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
index 8f13c22..ff150ca 100644
--- a/common/cmd_mmc.c
+++ b/common/cmd_mmc.c
@@ -106,7 +106,10 @@ static void print_mmcinfo(struct mmc *mmc)
 	printf("Rd Block Len: %d\n", mmc->read_bl_len);
 
 	printf("%s version %d.%d\n", IS_SD(mmc) ? "SD" : "MMC",
-			(mmc->version >> 4) & 0xf, mmc->version & 0xf);
+			(mmc->version >> 4) & 0xf,
+			(mmc->version & 0xf) == EXT_CSD_REV_1_5 ?
+			41 :((mmc->version & 0xf) > EXT_CSD_REV_1_5 ?
+			(mmc->version & 0xf) - 1 : (mmc->version & 0xf)));
 
 	printf("High Capacity: %s\n", mmc->high_capacity ? "Yes" : "No");
 	puts("Capacity: ");
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 49c3349..e035012 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -651,6 +651,31 @@ int mmc_change_freq(struct mmc *mmc)
 	if (err)
 		return err;
 
+	switch (ext_csd[EXT_CSD_REV]) {
+	case EXT_CSD_REV_1_0:
+		mmc->version |= EXT_CSD_REV_1_0;
+		break;
+	case EXT_CSD_REV_1_1:
+		mmc->version |= EXT_CSD_REV_1_1;
+		break;
+	case EXT_CSD_REV_1_2:
+		mmc->version |= EXT_CSD_REV_1_2;
+		break;
+	case EXT_CSD_REV_1_3:
+		mmc->version |= EXT_CSD_REV_1_3;
+		break;
+	case EXT_CSD_REV_1_5:
+		mmc->version |= EXT_CSD_REV_1_5;
+		break;
+	case EXT_CSD_REV_1_6:
+		mmc->version |= EXT_CSD_REV_1_6;
+		break;
+	case EXT_CSD_REV_1_4:
+	default:
+		printf("Unknown revision - %x\n", ext_csd[EXT_CSD_REV]);
+		return 0;
+	}
+
 	/* No high-speed support */
 	if (!ext_csd[EXT_CSD_HS_TIMING])
 		return 0;
diff --git a/include/mmc.h b/include/mmc.h
index 30c2375..726da99 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -157,6 +157,14 @@
 #define EXT_CSD_SEC_CNT			212	/* RO, 4 bytes */
 #define EXT_CSD_HC_ERASE_GRP_SIZE	224	/* RO */
 
+#define EXT_CSD_REV_1_0			0
+#define EXT_CSD_REV_1_1			1
+#define EXT_CSD_REV_1_2			2
+#define EXT_CSD_REV_1_3			3
+#define EXT_CSD_REV_1_4			4
+#define EXT_CSD_REV_1_5			5
+#define EXT_CSD_REV_1_6			6
+
 /*
  * EXT_CSD field definitions
  */
-- 
1.7.4.1