205 lines
5.9 KiB
C
205 lines
5.9 KiB
C
#ifndef _WD7000_H
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/* $Id: $
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*
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* Header file for the WD-7000 driver for Linux
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*
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* $Log: $
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* Revision 1.1 1992/07/24 06:27:38 root
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* Initial revision
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*
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* Revision 1.1 1992/07/05 08:32:32 root
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* Initial revision
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*
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* Revision 1.1 1992/05/15 18:38:05 root
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* Initial revision
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*
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* Revision 1.1 1992/04/02 03:23:13 drew
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* Initial revision
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*
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* Revision 1.3 1992/01/27 14:46:29 tthorn
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* *** empty log message ***
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*
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*/
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#include <linux/types.h>
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#undef STATMASK
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#undef CONTROL
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#define IO_BASE 0x350
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#define IRQ_LVL 15
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#define DMA_CH 6
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#define OGMB_CNT 8
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#define ICMB_CNT 16
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/* I/O Port interface 4.2 */
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/* READ */
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#define ASC_STAT IO_BASE
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#define INT_IM 0x80 /* Interrupt Image Flag */
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#define CMD_RDY 0x40 /* Command Port Ready */
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#define CMD_REJ 0x20 /* Command Port Byte Rejected */
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#define ASC_INI 0x10 /* ASC Initialized Flag */
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#define STATMASK 0xf0 /* The lower 4 Bytes are reserved */
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/* This register serves two purposes
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* Diagnostics error code
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* Interrupt Status
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*/
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#define INTR_STAT ASC_STAT+1
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#define ANYINTR 0x80 /* Mailbox Service possible/required */
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#define IMB 0x40 /* 1 Incoming / 0 Outgoing */
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#define MBMASK 0x3f
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/* if MSb is zero, the lower bits are diagnostic status *
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* Diagnostics:
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* 01 No diagnostic error occurred
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* 02 RAM failure
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* 03 FIFO R/W failed
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* 04 SBIC register read/write failed
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* 05 Initialization D-FF failed
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* 06 Host IRQ D-FF failed
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* 07 ROM checksum error
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* Interrupt status (bitwise):
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* 10NNNNNN outgoing mailbox NNNNNN is free
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* 11NNNNNN incoming mailbox NNNNNN needs service
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*/
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/* WRITE */
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#define COMMAND ASC_STAT
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/*
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* COMMAND opcodes
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*/
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#define NO_OP 0
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#define INITIALIZATION 1 /* initialization after reset (10 bytes) */
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#define DISABLE_UNS_INTR 2 /* disable unsolicited interrupts */
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#define ENABLE_UNS_INTR 3 /* enable unsolicited interrupts */
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#define INTR_ON_FREE_OGMB 4 /* interrupt on free OGMB */
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#define SCSI_SOFT_RESET 5 /* SCSI soft reset */
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#define SCSI_HARD_RESET 6 /* SCSI hard reset acknowledge */
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#define START_OGMB 0x80 /* start command in OGMB (n) */
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#define SCAN_OGMBS 0xc0 /* start multiple commands, signature (n) */
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/* where (n) = lower 6 bits */
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/*
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* For INITIALIZATION:
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*/
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#define BUS_ON 48 /* x 125ns, 48 = 6000ns, BIOS uses 8000ns */
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#define BUS_OFF 24 /* x 125ns, 24 = 3000ns, BIOS uses 1875ns */
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#define INTR_ACK ASC_STAT+1
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#define CONTROL ASC_STAT+2
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#define INT_EN 0x08 /* Interrupt Enable */
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#define DMA_EN 0x04 /* DMA Enable */
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#define SCSI_RES 0x02 /* SCSI Reset */
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#define ASC_RES 0x01 /* ASC Reset */
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/* Mailbox Definition */
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struct wd_mailbox{
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unchar status;
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unchar scbptr[3];
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};
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/* These belong in scsi.h also */
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#undef any2scsi
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#define any2scsi(up, p) \
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(up)[0] = (((long)(p)) >> 16); \
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(up)[1] = ((long)(p)) >> 8; \
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(up)[2] = ((long)(p));
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#define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) )
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#define xany2scsi(up, p) \
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(up)[0] = ((long)(p)) >> 24; \
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(up)[1] = ((long)(p)) >> 16; \
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(up)[2] = ((long)(p)) >> 8; \
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(up)[3] = ((long)(p));
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#define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \
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+ (((long)(up)[2]) << 8) + ((long)(up)[3]) )
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#define MAX_CDB 12
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#define MAX_SENSE 14
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typedef struct scb { /* Command Control Block 5.4.1 */
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unchar op; /* Command Control Block Operation Code */
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unchar idlun; /* op=0,2:Target Id, op=1:Initiator Id */
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/* Outbound data transfer, length is checked*/
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/* Inbound data transfer, length is checked */
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/* Logical Unit Number */
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unchar cdb[12]; /* SCSI Command Block */
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unchar status; /* SCSI Return Status */
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unchar vue; /* Vendor Unique Error Code */
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unchar maxlen[3]; /* Maximum Data Transfer Length */
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unchar dataptr[3]; /* SCSI Data Block Pointer */
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unchar linkptr[3]; /* Next Command Link Pointer */
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unchar direc; /* Transfer Direction */
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unchar reserved2[6]; /* SCSI Command Descriptor Block */
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/* end of hardware SCB */
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Scsi_Cmnd *SCpnt; /* Scsi_Cmnd using this SCB */
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struct scb *next; /* for lists of scbs */
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} Scb;
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/*
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* WD7000-specific scatter/gather element structure
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*/
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typedef struct sgb {
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unchar len[3];
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unchar ptr[3];
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} Sgb;
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/*
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* Note: MAX_SCBS _must_ be defined large enough to keep ahead of the
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* demand for SCBs, which will be at most WD7000_Q * WD7000_SG. 1 is
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* added to each because they can be 0.
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*/
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#define MAX_SCBS ((WD7000_Q+1) * (WD7000_SG+1))
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/*
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* The driver is written to allow host-only commands to be executed. These
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* use a 16-byte block called an ICB.
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*
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* (Currently, only wd7000_info uses this, to get the firmware rev. level.)
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*/
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#define ICB_STATUS 16 /* set to icmb status by wd7000_intr_handle */
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#define ICB_PHASE 17 /* set to 0 by wd7000_intr_handle */
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#define ICB_LEN 18 /* actually 16; this includes the above */
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int wd7000_detect(int);
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int wd7000_command(Scsi_Cmnd *);
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int wd7000_queuecommand(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
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int wd7000_abort(Scsi_Cmnd *, int);
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const char *wd7000_info(void);
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int wd7000_reset(Scsi_Cmnd *);
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int wd7000_biosparam(int, int, int*);
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#ifndef NULL
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#define NULL 0
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#endif
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/*
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* Define WD7000_SG to be the number of Sgbs that will fit in a block of
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* size WD7000_SCRIBBLE. WD7000_SCRIBBLE must be 512, 1024, 2048, or 4096.
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*
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* The sg_tablesize value will default to SG_NONE for older boards (before
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* rev 7.0), but will be changed to WD7000_SG when a newer board is
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* detected.
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*/
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#define WD7000_SCRIBBLE 512
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#define WD7000_Q OGMB_CNT
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#define WD7000_SG (WD7000_SCRIBBLE / sizeof(Sgb))
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#define WD7000 {\
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"Western Digital WD-7000", \
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wd7000_detect, \
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wd7000_info, wd7000_command, \
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wd7000_queuecommand, \
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wd7000_abort, \
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wd7000_reset, \
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NULL, \
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wd7000_biosparam, \
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WD7000_Q, 7, SG_NONE, 1, 0, 1}
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#endif
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