patch-2.1.101 linux/drivers/scsi/blz1230.h

• Lines: 83
• Date: Fri May 8 00:22:11 1998
• Orig file: v2.1.100/linux/drivers/scsi/blz1230.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.100/linux/drivers/scsi/blz1230.h linux/drivers/scsi/blz1230.h
@@ -0,0 +1,82 @@
+/* blz1230.h: Defines and structures for the Blizzard 1230 SCSI IV driver.
+ *
+ * Copyright (C) 1996 Jesper Skov (jskov@cygnus.co.uk)
+ *
+ * This file is based on cyber_esp.h (hence the occasional reference to
+ * CyberStorm).
+ */
+
+#include "NCR53C9x.h"
+
+#ifndef BLZ1230_H
+#define BLZ1230_H
+
+/* The controller registers can be found in the Z2 config area at these
+ * offsets:
+ */
+#define BLZ1230_ESP_ADDR 0x8000
+#define BLZ1230_DMA_ADDR 0x10000
+#define BLZ1230II_ESP_ADDR 0x10000
+#define BLZ1230II_DMA_ADDR 0x10021
+
+
+/* The Blizzard 1230 DMA interface
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * Only two things can be programmed in the Blizzard DMA:
+ *  1) The data direction is controlled by the status of bit 31 (1 = write)
+ *  2) The source/dest address (word aligned, shifted one right) in bits 30-0
+ *
+ * Program DMA by first latching the highest byte of the address/direction
+ * (i.e. bits 31-24 of the long word constructed as described in steps 1+2
+ * above). Then write each byte of the address/direction (starting with the
+ * top byte, working down) to the DMA address register.
+ *
+ * Figure out interrupt status by reading the ESP status byte.
+ */
+struct blz1230_dma_registers {
+	volatile unsigned char dma_addr; 	/* DMA address      [0x0000] */
+	unsigned char dmapad2[0x7fff];
+	volatile unsigned char dma_latch; 	/* DMA latch        [0x8000] */
+};
+
+struct blz1230II_dma_registers {
+	volatile unsigned char dma_addr; 	/* DMA address      [0x0000] */
+	unsigned char dmapad2[0xf];
+	volatile unsigned char dma_latch; 	/* DMA latch        [0x0010] */
+};
+
+#define BLZ1230_DMA_WRITE 0x80000000
+
+extern int blz1230_esp_detect(struct SHT *);
+extern const char *esp_info(struct Scsi_Host *);
+extern int esp_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
+extern int esp_command(Scsi_Cmnd *);
+extern int esp_abort(Scsi_Cmnd *);
+extern int esp_reset(Scsi_Cmnd *, unsigned int);
+extern int esp_proc_info(char *buffer, char **start, off_t offset, int length,
+			 int hostno, int inout);
+
+#define SCSI_BLZ1230 {                                                               \
+/* struct SHT *next */                                         NULL,                   \
+/* long *usage_count */                                        NULL,                   \
+/* struct proc_dir_entry *proc_dir */                          &proc_scsi_esp,         \
+/* int (*proc_info)(char *, char **, off_t, int, int, int) */  &esp_proc_info,                   \
+/* const char *name */                                         "Blizzard1230 SCSI IV", \
+/* int detect(struct SHT *) */                                 blz1230_esp_detect,             \
+/* int release(struct Scsi_Host *) */                          NULL,                   \
+/* const char *info(struct Scsi_Host *) */                     esp_info,               \
+/* int command(Scsi_Cmnd *) */                                 esp_command,            \
+/* int queuecommand(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *)) */ esp_queue,              \
+/* int abort(Scsi_Cmnd *) */                                   esp_abort,              \
+/* int reset(Scsi_Cmnd *) */                                   esp_reset,              \
+/* int slave_attach(int, int) */                               NULL,                   \
+/* int bios_param(Disk *, kdev_t, int[]) */                    NULL,                   \
+/* int can_queue */                                            7,                      \
+/* int this_id */                                              7,                      \
+/* short unsigned int sg_tablesize */                          SG_ALL,                 \
+/* short cmd_per_lun */                                        1,                      \
+/* unsigned char present */                                    0,                      \
+/* unsigned unchecked_isa_dma:1 */                             0,                      \
+/* unsigned use_clustering:1 */                                DISABLE_CLUSTERING, }
+
+#endif /* BLZ1230_H */