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/* 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_ */
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