blz1230.h
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上传日期:2013-02-24
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- /* 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 int blz1230_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_BLZ1230 { proc_name: "esp-blz1230",
- proc_info: esp_proc_info,
- name: "Blizzard1230 SCSI IV",
- detect: blz1230_esp_detect,
- release: blz1230_esp_release,
- command: esp_command,
- 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 /* BLZ1230_H */