+
+ unsigned long caps; /* Host capabilities */
+
+#define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */
+#define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */
+#define MMC_CAP_BYTEBLOCK (1 << 2) /* Can do non-log2 block sizes */