mmc: dw_mmc: modify DATA register offset

In dw_mmc 2.40a spec, Data register's offset is changed.
Before we used Data register offset 0x100. but if somebody uses a
2.40a controller, we must use 0x200 for Data register.

This patch adds a version-id checking point and uses SDMMC_DATA(x)
instead of SDMMC_DATA.  It assumes 2.40a is the latest version.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/dw_mmc.h

@@ -14,6 +14,8 @@
 #ifndef _DW_MMC_H_
 #define _DW_MMC_H_
 
+#define DW_MMC_240A		0x240a
+
 #define SDMMC_CTRL		0x000
 #define SDMMC_PWREN		0x004
 #define SDMMC_CLKDIV		0x008
@@ -51,7 +53,14 @@
 #define SDMMC_IDINTEN		0x090
 #define SDMMC_DSCADDR		0x094
 #define SDMMC_BUFADDR		0x098
-#define SDMMC_DATA		0x100
+#define SDMMC_DATA(x)		(x)
+
+/*
+ * Data offset is difference according to Version
+ * Lower than 2.40a : data register offest is 0x100
+ */
+#define DATA_OFFSET		0x100
+#define DATA_240A_OFFSET	0x200
 
 /* shift bit field */
 #define _SBF(f, v)		((v) << (f))
@@ -130,6 +139,8 @@
 #define SDMMC_IDMAC_ENABLE		BIT(7)
 #define SDMMC_IDMAC_FB			BIT(1)
 #define SDMMC_IDMAC_SWRESET		BIT(0)
+/* Version ID register define */
+#define SDMMC_GET_VERID(x)		((x) & 0xFFFF)
 
 /* Register access macros */
 #define mci_readl(dev, reg)			\