Index: sys/dev/mmc/mmcreg.h
===================================================================
--- sys/dev/mmc/mmcreg.h
+++ sys/dev/mmc/mmcreg.h
@@ -561,11 +561,14 @@
 #define	 CCCR_BUS_WIDTH_4		(1 << 1)
 #define	 CCCR_BUS_WIDTH_1		(1 << 0)
 #define	SD_IO_CCCR_CARDCAP		0x08
+#define	 CCCR_CC_SMB			(1 << 1)
 #define	SD_IO_CCCR_CISPTR		0x09	/* XXX 9-10, 10-11, or 9-12 */
 
 /* Function Basic Registers (FBR) */
 #define	SD_IO_FBR_START			0x00100
 #define	SD_IO_FBR_SIZE			0x00700
+#define	SD_IO_FBR_CIS_OFFSET		0x9
+#define	SD_IO_FBR_IOBLKSZ_OFFSET	0x10
 
 /* Card Information Structure (CIS) */
 #define	SD_IO_CIS_START			0x01000