+#define OCR_BUSY 0x80000000
+#define OCR_HCS 0x40000000
+#define OCR_VOLTAGE_MASK 0x007FFF80
+#define OCR_ACCESS_MODE 0x60000000
+
+#define SECURE_ERASE 0x80000000
+
+#define MMC_STATUS_MASK (~0x0206BF7F)
+#define MMC_STATUS_RDY_FOR_DATA (1 << 8)
+#define MMC_STATUS_CURR_STATE (0xf << 9)
+#define MMC_STATUS_ERROR (1 << 19)
+
+#define MMC_STATE_PRG (7 << 9)