aha1542.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _AHA1542_H_
  3#define _AHA1542_H_
  4
  5#include <linux/types.h>
  6
  7/* I/O Port interface 4.2 */
  8/* READ */
  9#define STATUS(base) base
 10#define STST	BIT(7)		/* Self Test in Progress */
 11#define DIAGF	BIT(6)		/* Internal Diagnostic Failure */
 12#define INIT	BIT(5)		/* Mailbox Initialization Required */
 13#define IDLE	BIT(4)		/* SCSI Host Adapter Idle */
 14#define CDF	BIT(3)		/* Command/Data Out Port Full */
 15#define DF	BIT(2)		/* Data In Port Full */
 16/* BIT(1) is reserved */
 17#define INVDCMD	BIT(0)		/* Invalid H A Command */
 18#define STATMASK (STST | DIAGF | INIT | IDLE | CDF | DF | INVDCMD)
 19
 20#define INTRFLAGS(base) (STATUS(base)+2)
 21#define ANYINTR	BIT(7)		/* Any Interrupt */
 22#define SCRD	BIT(3)		/* SCSI Reset Detected */
 23#define HACC	BIT(2)		/* HA Command Complete */
 24#define MBOA	BIT(1)		/* MBO Empty */
 25#define MBIF	BIT(0)		/* MBI Full */
 26#define INTRMASK (ANYINTR | SCRD | HACC | MBOA | MBIF)
 27
 28/* WRITE */
 29#define CONTROL(base) STATUS(base)
 30#define HRST	BIT(7)		/* Hard Reset */
 31#define SRST	BIT(6)		/* Soft Reset */
 32#define IRST	BIT(5)		/* Interrupt Reset */
 33#define SCRST	BIT(4)		/* SCSI Bus Reset */
 34
 35/* READ/WRITE */
 36#define DATA(base) (STATUS(base)+1)
 37#define CMD_NOP		0x00	/* No Operation */
 38#define CMD_MBINIT	0x01	/* Mailbox Initialization */
 39#define CMD_START_SCSI	0x02	/* Start SCSI Command */
 40#define CMD_INQUIRY	0x04	/* Adapter Inquiry */
 41#define CMD_EMBOI	0x05	/* Enable MailBox Out Interrupt */
 42#define CMD_BUSON_TIME	0x07	/* Set Bus-On Time */
 43#define CMD_BUSOFF_TIME	0x08	/* Set Bus-Off Time */
 44#define CMD_DMASPEED	0x09	/* Set AT Bus Transfer Speed */
 45#define CMD_RETDEVS	0x0a	/* Return Installed Devices */
 46#define CMD_RETCONF	0x0b	/* Return Configuration Data */
 47#define CMD_RETSETUP	0x0d	/* Return Setup Data */
 48#define CMD_ECHO	0x1f	/* ECHO Command Data */
 49
 50#define CMD_EXTBIOS     0x28    /* Return extend bios information only 1542C */
 51#define CMD_MBENABLE    0x29    /* Set Mailbox Interface enable only 1542C */
 52
 53/* Mailbox Definition 5.2.1 and 5.2.2 */
 54struct mailbox {
 55	u8 status;	/* Command/Status */
 56	u8 ccbptr[3];	/* msb, .., lsb */
 57};
 58
 59/* This is used with scatter-gather */
 60struct chain {
 61	u8 datalen[3];	/* Size of this part of chain */
 62	u8 dataptr[3];	/* Location of data */
 63};
 64
 65/* These belong in scsi.h also */
 66static inline void any2scsi(u8 *p, u32 v)
 67{
 68	p[0] = v >> 16;
 69	p[1] = v >> 8;
 70	p[2] = v;
 71}
 72
 73#define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) )
 74
 75#define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \
 76		      + (((long)(up)[2]) <<  8) +  ((long)(up)[3]) )
 77
 78#define MAX_CDB 12
 79#define MAX_SENSE 14
 80
 81/* Command Control Block (CCB), 5.3 */
 82struct ccb {
 83	u8 op;		/* Command Control Block Operation Code: */
 84			/* 0x00: SCSI Initiator CCB, 0x01: SCSI Target CCB, */
 85			/* 0x02: SCSI Initiator CCB with Scatter/Gather, */
 86			/* 0x81: SCSI Bus Device Reset CCB */
 87	u8 idlun;	/* Address and Direction Control: */
 88			/* Bits 7-5: op=0, 2: Target ID, op=1: Initiator ID */
 89			/* Bit	4: Outbound data transfer, length is checked */
 90			/* Bit	3:  Inbound data transfer, length is checked */
 91			/* Bits 2-0: Logical Unit Number */
 92	u8 cdblen;	/* SCSI Command Length */
 93	u8 rsalen;	/* Request Sense Allocation Length/Disable Auto Sense */
 94	u8 datalen[3];	/* Data Length  (MSB, ..., LSB) */
 95	u8 dataptr[3];	/* Data Pointer (MSB, ..., LSB) */
 96	u8 linkptr[3];	/* Link Pointer (MSB, ..., LSB) */
 97	u8 commlinkid;	/* Command Linking Identifier */
 98	u8 hastat;	/* Host  Adapter Status (HASTAT) */
 99	u8 tarstat;	/* Target Device Status (TARSTAT) */
100	u8 reserved[2];
101	u8 cdb[MAX_CDB + MAX_SENSE];	/* SCSI Command Descriptor Block */
102					/* followed by the Auto Sense data */
103};
104
105#define AHA1542_REGION_SIZE 4
106#define AHA1542_MAILBOXES 8
107
108#endif /* _AHA1542_H_ */