1 /* blz2060.h: Defines and structures for the Blizzard 2060 SCSI driver.
2 *
3 * Copyright (C) 1996 Jesper Skov (jskov@cygnus.co.uk)
4 *
5 * This file is based on cyber_esp.h (hence the occasional reference to
6 * CyberStorm).
7 */
8
9 #include "NCR53C9x.h"
10
11 #ifndef BLZ2060_H
12 #define BLZ2060_H
13
14 /* The controller registers can be found in the Z2 config area at these
15 * offsets:
16 */
17 #define BLZ2060_ESP_ADDR 0x1ff00
18 #define BLZ2060_DMA_ADDR 0x1ffe0
19
20
21 /* The Blizzard 2060 DMA interface
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 * Only two things can be programmed in the Blizzard DMA:
24 * 1) The data direction is controlled by the status of bit 31 (1 = write)
25 * 2) The source/dest address (word aligned, shifted one right) in bits 30-0
26 *
27 * Figure out interrupt status by reading the ESP status byte.
28 */
29 struct blz2060_dma_registers {
30 volatile unsigned char dma_led_ctrl; /* DMA led control [0x000] */
31 unsigned char dmapad1[0x0f];
32 volatile unsigned char dma_addr0; /* DMA address (MSB) [0x010] */
33 unsigned char dmapad2[0x03];
34 volatile unsigned char dma_addr1; /* DMA address [0x014] */
35 unsigned char dmapad3[0x03];
36 volatile unsigned char dma_addr2; /* DMA address [0x018] */
37 unsigned char dmapad4[0x03];
38 volatile unsigned char dma_addr3; /* DMA address (LSB) [0x01c] */
39 };
40
41 #define BLZ2060_DMA_WRITE 0x80000000
42
43 /* DMA control bits */
44 #define BLZ2060_DMA_LED 0x02 /* HD led control 1 = off */
45
46 extern int blz2060_esp_detect(struct SHT *);
47 extern int blz2060_esp_release(struct Scsi_Host *);
48 extern const char *esp_info(struct Scsi_Host *);
49 extern int esp_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
50 extern int esp_command(Scsi_Cmnd *);
51 extern int esp_abort(Scsi_Cmnd *);
52 extern int esp_reset(Scsi_Cmnd *, unsigned int);
53 extern int esp_proc_info(char *buffer, char **start, off_t offset, int length,
54 int hostno, int inout);
55
56 #define SCSI_BLZ2060 { proc_name: "esp-blz2060", \
57 proc_info: esp_proc_info, \
58 name: "Blizzard2060 SCSI", \
59 detect: blz2060_esp_detect, \
60 release: blz2060_esp_release, \
61 queuecommand: esp_queue, \
62 abort: esp_abort, \
63 reset: esp_reset, \
64 can_queue: 7, \
65 this_id: 7, \
66 sg_tablesize: SG_ALL, \
67 cmd_per_lun: 1, \
68 use_clustering: ENABLE_CLUSTERING }
69
70 #endif /* BLZ2060_H */
71
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