drivers/scsi/blz2060.h

   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_dir:           &proc_scsi_esp, \
  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 */