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1275 |
phoenix |
/* blz2060.h: Defines and structures for the Blizzard 2060 SCSI driver.
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*
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* Copyright (C) 1996 Jesper Skov (jskov@cygnus.co.uk)
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*
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* This file is based on cyber_esp.h (hence the occasional reference to
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* CyberStorm).
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*/
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#include "NCR53C9x.h"
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#ifndef BLZ2060_H
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#define BLZ2060_H
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/* The controller registers can be found in the Z2 config area at these
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* offsets:
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*/
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#define BLZ2060_ESP_ADDR 0x1ff00
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#define BLZ2060_DMA_ADDR 0x1ffe0
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/* The Blizzard 2060 DMA interface
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Only two things can be programmed in the Blizzard DMA:
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* 1) The data direction is controlled by the status of bit 31 (1 = write)
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* 2) The source/dest address (word aligned, shifted one right) in bits 30-0
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*
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* Figure out interrupt status by reading the ESP status byte.
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*/
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struct blz2060_dma_registers {
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volatile unsigned char dma_led_ctrl; /* DMA led control [0x000] */
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unsigned char dmapad1[0x0f];
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volatile unsigned char dma_addr0; /* DMA address (MSB) [0x010] */
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unsigned char dmapad2[0x03];
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volatile unsigned char dma_addr1; /* DMA address [0x014] */
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unsigned char dmapad3[0x03];
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volatile unsigned char dma_addr2; /* DMA address [0x018] */
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unsigned char dmapad4[0x03];
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volatile unsigned char dma_addr3; /* DMA address (LSB) [0x01c] */
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};
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#define BLZ2060_DMA_WRITE 0x80000000
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/* DMA control bits */
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#define BLZ2060_DMA_LED 0x02 /* HD led control 1 = off */
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extern int blz2060_esp_detect(struct SHT *);
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extern int blz2060_esp_release(struct Scsi_Host *);
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extern const char *esp_info(struct Scsi_Host *);
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extern int esp_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
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extern int esp_command(Scsi_Cmnd *);
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extern int esp_abort(Scsi_Cmnd *);
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extern int esp_reset(Scsi_Cmnd *, unsigned int);
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extern int esp_proc_info(char *buffer, char **start, off_t offset, int length,
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int hostno, int inout);
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#define SCSI_BLZ2060 { proc_name: "esp-blz2060", \
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proc_info: esp_proc_info, \
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name: "Blizzard2060 SCSI", \
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detect: blz2060_esp_detect, \
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release: blz2060_esp_release, \
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queuecommand: esp_queue, \
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abort: esp_abort, \
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reset: esp_reset, \
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can_queue: 7, \
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this_id: 7, \
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sg_tablesize: SG_ALL, \
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cmd_per_lun: 1, \
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use_clustering: ENABLE_CLUSTERING }
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#endif /* BLZ2060_H */
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