xref: /openbmc/linux/drivers/scsi/aha1542.h (revision 3a70c006edbe6071bd78e1e0c8004791cd4b531c)
1 #ifndef _AHA1542_H
2 
3 /* $Id: aha1542.h,v 1.1 1992/07/24 06:27:38 root Exp root $
4  *
5  * Header file for the adaptec 1542 driver for Linux
6  *
7  * $Log: aha1542.h,v $
8  * Revision 1.1  1992/07/24  06:27:38  root
9  * Initial revision
10  *
11  * Revision 1.2  1992/07/04  18:41:49  root
12  * Replaced distribution with current drivers
13  *
14  * Revision 1.3  1992/06/23  23:58:20  root
15  * Fixes.
16  *
17  * Revision 1.2  1992/05/26  22:13:23  root
18  * Changed bug that prevented DMA above first 2 mbytes.
19  *
20  * Revision 1.1  1992/05/22  21:00:29  root
21  * Initial revision
22  *
23  * Revision 1.1  1992/04/24  18:01:50  root
24  * Initial revision
25  *
26  * Revision 1.1  1992/04/02  03:23:13  drew
27  * Initial revision
28  *
29  * Revision 1.3  1992/01/27  14:46:29  tthorn
30  * *** empty log message ***
31  *
32  */
33 
34 #include <linux/types.h>
35 
36 /* I/O Port interface 4.2 */
37 /* READ */
38 #define STATUS(base) base
39 #define STST	BIT(7)		/* Self Test in Progress */
40 #define DIAGF	BIT(6)		/* Internal Diagnostic Failure */
41 #define INIT	BIT(5)		/* Mailbox Initialization Required */
42 #define IDLE	BIT(4)		/* SCSI Host Adapter Idle */
43 #define CDF	BIT(3)		/* Command/Data Out Port Full */
44 #define DF	BIT(2)		/* Data In Port Full */
45 /* BIT(1) is reserved */
46 #define INVDCMD	BIT(0)		/* Invalid H A Command */
47 #define STATMASK (STST | DIAGF | INIT | IDLE | CDF | DF | INVDCMD)
48 
49 #define INTRFLAGS(base) (STATUS(base)+2)
50 #define ANYINTR	BIT(7)		/* Any Interrupt */
51 #define SCRD	BIT(3)		/* SCSI Reset Detected */
52 #define HACC	BIT(2)		/* HA Command Complete */
53 #define MBOA	BIT(1)		/* MBO Empty */
54 #define MBIF	BIT(0)		/* MBI Full */
55 #define INTRMASK (ANYINTR | SCRD | HACC | MBOA | MBIF)
56 
57 /* WRITE */
58 #define CONTROL(base) STATUS(base)
59 #define HRST	BIT(7)		/* Hard Reset */
60 #define SRST	BIT(6)		/* Soft Reset */
61 #define IRST	BIT(5)		/* Interrupt Reset */
62 #define SCRST	BIT(4)		/* SCSI Bus Reset */
63 
64 /* READ/WRITE */
65 #define DATA(base) (STATUS(base)+1)
66 #define CMD_NOP		0x00	/* No Operation */
67 #define CMD_MBINIT	0x01	/* Mailbox Initialization */
68 #define CMD_START_SCSI	0x02	/* Start SCSI Command */
69 #define CMD_INQUIRY	0x04	/* Adapter Inquiry */
70 #define CMD_EMBOI	0x05	/* Enable MailBox Out Interrupt */
71 #define CMD_BUSON_TIME	0x07	/* Set Bus-On Time */
72 #define CMD_BUSOFF_TIME	0x08	/* Set Bus-Off Time */
73 #define CMD_DMASPEED	0x09	/* Set AT Bus Transfer Speed */
74 #define CMD_RETDEVS	0x0a	/* Return Installed Devices */
75 #define CMD_RETCONF	0x0b	/* Return Configuration Data */
76 #define CMD_RETSETUP	0x0d	/* Return Setup Data */
77 #define CMD_ECHO	0x1f	/* ECHO Command Data */
78 
79 #define CMD_EXTBIOS     0x28    /* Return extend bios information only 1542C */
80 #define CMD_MBENABLE    0x29    /* Set Mailbox Interface enable only 1542C */
81 
82 /* Mailbox Definition 5.2.1 and 5.2.2 */
83 struct mailbox {
84 	u8 status;	/* Command/Status */
85 	u8 ccbptr[3];	/* msb, .., lsb */
86 };
87 
88 /* This is used with scatter-gather */
89 struct chain {
90 	u8 datalen[3];	/* Size of this part of chain */
91 	u8 dataptr[3];	/* Location of data */
92 };
93 
94 /* These belong in scsi.h also */
95 static inline void any2scsi(u8 *p, u32 v)
96 {
97 	p[0] = v >> 16;
98 	p[1] = v >> 8;
99 	p[2] = v;
100 }
101 
102 #define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) )
103 
104 #define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \
105 		      + (((long)(up)[2]) <<  8) +  ((long)(up)[3]) )
106 
107 #define MAX_CDB 12
108 #define MAX_SENSE 14
109 
110 struct ccb {		/* Command Control Block 5.3 */
111 	u8 op;		/* Command Control Block Operation Code */
112 	u8 idlun;	/* op=0,2:Target Id, op=1:Initiator Id */
113 			/* Outbound data transfer, length is checked*/
114 			/* Inbound data transfer, length is checked */
115 			/* Logical Unit Number */
116 	u8 cdblen;	/* SCSI Command Length */
117 	u8 rsalen;	/* Request Sense Allocation Length/Disable */
118 	u8 datalen[3];	/* Data Length (msb, .., lsb) */
119 	u8 dataptr[3];	/* Data Pointer */
120 	u8 linkptr[3];	/* Link Pointer */
121 	u8 commlinkid;	/* Command Linking Identifier */
122 	u8 hastat;	/* Host Adapter Status (HASTAT) */
123 	u8 tarstat;	/* Target Device Status */
124 	u8 reserved[2];
125 	u8 cdb[MAX_CDB+MAX_SENSE];	/* SCSI Command Descriptor Block */
126 					/* REQUEST SENSE */
127 };
128 
129 #define AHA1542_REGION_SIZE 4
130 #define AHA1542_MAILBOXES 8
131 
132 #endif
133