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/* blz2060.h: Defines and structures for the Blizzard 2060 SCSI 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 BLZ2060_H
#define BLZ2060_H
/* The controller registers can be found in the Z2 config area at these
* offsets:
*/
#define BLZ2060_ESP_ADDR 0x1ff00
#define BLZ2060_DMA_ADDR 0x1ffe0
/* The Blizzard 2060 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
*
* Figure out interrupt status by reading the ESP status byte.
*/
struct blz2060_dma_registers {
volatile unsigned char dma_led_ctrl; /* DMA led control [0x000] */
unsigned char dmapad1[0x0f];
volatile unsigned char dma_addr0; /* DMA address (MSB) [0x010] */
unsigned char dmapad2[0x03];
volatile unsigned char dma_addr1; /* DMA address [0x014] */
unsigned char dmapad3[0x03];
volatile unsigned char dma_addr2; /* DMA address [0x018] */
unsigned char dmapad4[0x03];
volatile unsigned char dma_addr3; /* DMA address (LSB) [0x01c] */
};
#define BLZ2060_DMA_WRITE 0x80000000
/* DMA control bits */
#define BLZ2060_DMA_LED 0x02 /* HD led control 1 = off */
extern int blz2060_esp_detect(struct SHT *);
extern int blz2060_esp_release(struct Scsi_Host *);
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_BLZ2060 { proc_dir: &proc_scsi_esp, \
proc_info: esp_proc_info, \
name: "Blizzard2060 SCSI", \
detect: blz2060_esp_detect, \
release: blz2060_esp_release, \
queuecommand: esp_queue, \
abort: esp_abort, \
reset: esp_reset, \
can_queue: 7, \
this_id: 7, \
sg_tablesize: SG_ALL, \
cmd_per_lun: 1, \
use_clustering: ENABLE_CLUSTERING }
#endif /* BLZ2060_H */
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