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 */
54 struct mailbox {
55 u8 status; /* Command/Status */
56 u8 ccbptr[3]; /* msb, .., lsb */
57 };
58
59 /* This is used with scatter-gather */
60 struct 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 */
66 static 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 struct ccb { /* Command Control Block 5.3 */
82 u8 op; /* Command Control Block Operation Code */
83 u8 idlun; /* op=0,2:Target Id, op=1:Initiator Id */
84 /* Outbound data transfer, length is checked*/
85 /* Inbound data transfer, length is checked */
86 /* Logical Unit Number */
87 u8 cdblen; /* SCSI Command Length */
88 u8 rsalen; /* Request Sense Allocation Length/Disable */
89 u8 datalen[3]; /* Data Length (msb, .., lsb) */
90 u8 dataptr[3]; /* Data Pointer */
91 u8 linkptr[3]; /* Link Pointer */
92 u8 commlinkid; /* Command Linking Identifier */
93 u8 hastat; /* Host Adapter Status (HASTAT) */
94 u8 tarstat; /* Target Device Status */
95 u8 reserved[2];
96 u8 cdb[MAX_CDB+MAX_SENSE]; /* SCSI Command Descriptor Block */
97 /* REQUEST SENSE */
98 };
99
100 #define AHA1542_REGION_SIZE 4
101 #define AHA1542_MAILBOXES 8
102
103 #endif /* _AHA1542_H_ */