diff --git a/drivers/mmc/tmio-common.h b/drivers/mmc/tmio-common.h
index 9062300..59d5a0e 100644
--- a/drivers/mmc/tmio-common.h
+++ b/drivers/mmc/tmio-common.h
@@ -90,6 +90,7 @@
 #define   TMIO_SD_VOLT_180		(2 << 0)/* 1.8V signal */
 #define TMIO_SD_DMA_MODE		0x410
 #define   TMIO_SD_DMA_MODE_DIR_RD	BIT(16)	/* 1: from device, 0: to dev */
+#define   TMIO_SD_DMA_MODE_BUS_WIDTH	(BIT(5) | BIT(4)) /* RCar, 64bit */
 #define   TMIO_SD_DMA_MODE_ADDR_INC	BIT(0)	/* 1: address inc, 0: fixed */
 #define TMIO_SD_DMA_CTL		0x414
 #define   TMIO_SD_DMA_CTL_START	BIT(0)	/* start DMA (auto cleared) */
@@ -121,6 +122,7 @@
 	unsigned int			version;
 	u32				caps;
 	u32				read_poll_flag;
+	u32				idma_bus_width;
 #define TMIO_SD_CAP_NONREMOVABLE	BIT(0)	/* Nonremovable e.g. eMMC */
 #define TMIO_SD_CAP_DMA_INTERNAL	BIT(1)	/* have internal DMA engine */
 #define TMIO_SD_CAP_DIV1024		BIT(2)	/* divisor 1024 is available */