Index: sys/dev/mmc/mmcreg.h
===================================================================
--- sys/dev/mmc/mmcreg.h
+++ sys/dev/mmc/mmcreg.h
@@ -549,7 +549,11 @@
 #define	SD_IO_RW_LEN(x)		(((x) & 0xFF) << 0)
 
 #define	SD_IOE_RW_LEN(x)	(((x) & 0x1FF) << 0)
+#define	SD_IOE_RW_ADR(x)	(((x) & 0x1FFFF) << 9)
+#define	SD_IOE_RW_INCR		(1u << 26)
 #define	SD_IOE_RW_BLK		(1u << 27)
+#define	SD_IOE_RW_FUNC(x)	(((x) & 0x7) << 28)
+#define	SD_IOE_RW_WR		(1u << 31)
 
 /* Card Common Control Registers (CCCR) */
 #define	SD_IO_CCCR_START		0x00000
@@ -564,11 +568,15 @@
 #define	 CCCR_BUS_WIDTH_4		(1 << 1)
 #define	 CCCR_BUS_WIDTH_1		(1 << 0)
 #define	SD_IO_CCCR_CARDCAP		0x08
-#define	SD_IO_CCCR_CISPTR		0x09	/* XXX 9-10, 10-11, or 9-12 */
-
+#define  CCCR_CC_SMB                    (1 << 1)
+#define	SD_IO_CCCR_CISPTR		0x09    /* 0x09 - 0x0B */
+#define SD_IO_CCCR_FN0_BLKSZ            0x10    /* 0x10 - 0x11 */
 /* Function Basic Registers (FBR) */
 #define	SD_IO_FBR_START			0x00100
 #define	SD_IO_FBR_SIZE			0x00700
+#define SD_IO_FBR_START_F(n)            (SD_IO_FBR_START + (n-1) * 0x00100)
+#define SD_IO_FBR_CIS_OFFSET            0x9
+#define SD_IO_FBR_IOBLKSZ               0x10
 
 /* Card Information Structure (CIS) */
 #define	SD_IO_CIS_START			0x01000