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 | /* Command Control Block (CCB), 5.3 */ |
82 | struct 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_ */ |
109 | |