+/* Tape door status */
+#define DOOR_UNLOCKED 0
+#define DOOR_LOCKED 1
+#define DOOR_EXPLICITLY_LOCKED 2
+
+/* Some defines for the SPACE command */
+#define IDETAPE_SPACE_OVER_FILEMARK 1
+#define IDETAPE_SPACE_TO_EOD 3
+
+/* Some defines for the LOAD UNLOAD command */
+#define IDETAPE_LU_LOAD_MASK 1
+#define IDETAPE_LU_RETENSION_MASK 2
+#define IDETAPE_LU_EOT_MASK 4
+
+/*
+ * Special requests for our block device strategy routine.
+ *
+ * In order to service a character device command, we add special requests to
+ * the tail of our block device request queue and wait for their completion.
+ */
+
+enum {
+ REQ_IDETAPE_PC1 = (1 << 0), /* packet command (first stage) */
+ REQ_IDETAPE_PC2 = (1 << 1), /* packet command (second stage) */
+ REQ_IDETAPE_READ = (1 << 2),
+ REQ_IDETAPE_WRITE = (1 << 3),
+};
+
+/* Error codes returned in rq->errors to the higher part of the driver. */
+#define IDETAPE_ERROR_GENERAL 101
+#define IDETAPE_ERROR_FILEMARK 102
+#define IDETAPE_ERROR_EOD 103
+
+/* Structures related to the SELECT SENSE / MODE SENSE packet commands. */
+#define IDETAPE_BLOCK_DESCRIPTOR 0
+#define IDETAPE_CAPABILITIES_PAGE 0x2a
+