drivers/scsi/aha1542.h

root/drivers/scsi/aha1542.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _AHA1542_H_
#define _AHA1542_H_

#include <linux/types.h>

/* I/O Port interface 4.2 */
/* READ */
#define STATUS(base) base
#define STST    BIT(7)          /* Self Test in Progress */
#define DIAGF   BIT(6)          /* Internal Diagnostic Failure */
#define INIT    BIT(5)          /* Mailbox Initialization Required */
#define IDLE    BIT(4)          /* SCSI Host Adapter Idle */
#define CDF     BIT(3)          /* Command/Data Out Port Full */
#define DF      BIT(2)          /* Data In Port Full */
/* BIT(1) is reserved */
#define INVDCMD BIT(0)          /* Invalid H A Command */
#define STATMASK (STST | DIAGF | INIT | IDLE | CDF | DF | INVDCMD)

#define INTRFLAGS(base) (STATUS(base)+2)
#define ANYINTR BIT(7)          /* Any Interrupt */
#define SCRD    BIT(3)          /* SCSI Reset Detected */
#define HACC    BIT(2)          /* HA Command Complete */
#define MBOA    BIT(1)          /* MBO Empty */
#define MBIF    BIT(0)          /* MBI Full */
#define INTRMASK (ANYINTR | SCRD | HACC | MBOA | MBIF)

/* WRITE */
#define CONTROL(base) STATUS(base)
#define HRST    BIT(7)          /* Hard Reset */
#define SRST    BIT(6)          /* Soft Reset */
#define IRST    BIT(5)          /* Interrupt Reset */
#define SCRST   BIT(4)          /* SCSI Bus Reset */

/* READ/WRITE */
#define DATA(base) (STATUS(base)+1)
#define CMD_NOP         0x00    /* No Operation */
#define CMD_MBINIT      0x01    /* Mailbox Initialization */
#define CMD_START_SCSI  0x02    /* Start SCSI Command */
#define CMD_INQUIRY     0x04    /* Adapter Inquiry */
#define CMD_EMBOI       0x05    /* Enable MailBox Out Interrupt */
#define CMD_BUSON_TIME  0x07    /* Set Bus-On Time */
#define CMD_BUSOFF_TIME 0x08    /* Set Bus-Off Time */
#define CMD_DMASPEED    0x09    /* Set AT Bus Transfer Speed */
#define CMD_RETDEVS     0x0a    /* Return Installed Devices */
#define CMD_RETCONF     0x0b    /* Return Configuration Data */
#define CMD_RETSETUP    0x0d    /* Return Setup Data */
#define CMD_ECHO        0x1f    /* ECHO Command Data */

#define CMD_EXTBIOS     0x28    /* Return extend bios information only 1542C */
#define CMD_MBENABLE    0x29    /* Set Mailbox Interface enable only 1542C */

/* Mailbox Definition 5.2.1 and 5.2.2 */
struct mailbox {
        u8 status;      /* Command/Status */
        u8 ccbptr[3];   /* msb, .., lsb */
};

/* This is used with scatter-gather */
struct chain {
        u8 datalen[3];  /* Size of this part of chain */
        u8 dataptr[3];  /* Location of data */
};

/* These belong in scsi.h also */
static inline void any2scsi(u8 *p, u32 v)
{
        p[0] = v >> 16;
        p[1] = v >> 8;
        p[2] = v;
}

#define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) )

#define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \
                      + (((long)(up)[2]) <<  8) +  ((long)(up)[3]) )

#define MAX_CDB 12
#define MAX_SENSE 14

/* Command Control Block (CCB), 5.3 */
struct ccb {
        u8 op;          /* Command Control Block Operation Code: */
                        /* 0x00: SCSI Initiator CCB, 0x01: SCSI Target CCB, */
                        /* 0x02: SCSI Initiator CCB with Scatter/Gather, */
                        /* 0x81: SCSI Bus Device Reset CCB */
        u8 idlun;       /* Address and Direction Control: */
                        /* Bits 7-5: op=0, 2: Target ID, op=1: Initiator ID */
                        /* Bit  4: Outbound data transfer, length is checked */
                        /* Bit  3:  Inbound data transfer, length is checked */
                        /* Bits 2-0: Logical Unit Number */
        u8 cdblen;      /* SCSI Command Length */
        u8 rsalen;      /* Request Sense Allocation Length/Disable Auto Sense */
        u8 datalen[3];  /* Data Length  (MSB, ..., LSB) */
        u8 dataptr[3];  /* Data Pointer (MSB, ..., LSB) */
        u8 linkptr[3];  /* Link Pointer (MSB, ..., LSB) */
        u8 commlinkid;  /* Command Linking Identifier */
        u8 hastat;      /* Host  Adapter Status (HASTAT) */
        u8 tarstat;     /* Target Device Status (TARSTAT) */
        u8 reserved[2];
        u8 cdb[MAX_CDB + MAX_SENSE];    /* SCSI Command Descriptor Block */
                                        /* followed by the Auto Sense data */
};

#define AHA1542_REGION_SIZE 4
#define AHA1542_MAILBOXES 8

#endif /* _AHA1542_H_ */
Linux
