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1.1 root 1: /*++
2:
3: Copyright (c) 1991, 1992 Microsoft Corporation
4: Copyright (c) 1992 Future Domain Corporation
5:
6: Module Name:
7:
8: fd8xx.h
9:
10: Abstract:
11:
12: Definitions for the Future Domain TMC-8XX SCSI controllers.
13:
14: Author:
15:
16: Bob Rinne (bobri - Microsoft) June 1991
17: Roger Stoller (v-rogs - Future Domain) August 1992
18:
19: Revision History:
20:
21: --*/
22:
23: #include "scsi.h"
24:
25: //
26: // Size of memory mapped area used.
27: //
28: #define FD8XX_ADDRESS_SIZE 0x2000
29:
30: //
31: // I/O Memory Map Interface. Offsets from BaseAddress referrences.
32: //
33: #define WRITE_CONTROL 0x1C00
34: #define READ_STATUS 0x1C00
35: #define WRITE_SCSI 0x1E00
36: #define READ_SCSI 0x1E00
37:
38: //
39: // Macros for accessing the control memory of the FD8XX.
40: //
41: #define FD8XX_SET_CONTROL(BASE, VALUE) \
42: ScsiPortWriteRegisterUchar((BASE + WRITE_CONTROL), (VALUE))
43:
44: #define FD8XX_READ_STATUS(BASE) \
45: ScsiPortReadRegisterUchar(BASE + READ_STATUS)
46:
47: #define FD8XX_READ_ALTERNATE_STATUS(BASE, OFFSET) \
48: ScsiPortReadRegisterUchar(BASE + (READ_STATUS + OFFSET))
49:
50: #define FD8XX_WRITE_DATA(BASE, VALUE) \
51: ScsiPortWriteRegisterUchar((BASE + WRITE_SCSI), (UCHAR) (VALUE))
52:
53: #define FD8XX_READ_DATA(BASE) \
54: ScsiPortReadRegisterUchar(BASE + READ_SCSI)
55:
56: #define FD8XX_READ_ALTERNATE_DATA(BASE, OFFSET) \
57: ScsiPortReadRegisterUchar(BASE + READ_SCSI + OFFSET)
58:
59: //
60: // Control port output codes.
61: //
62: #define C_RESET 0x01 // Assert SCSI reset line
63: #define C_SELECT 0x02 // Assert SCSI select line
64: #define C_BUSY 0x04 // Assert SCSI busy line
65: #define C_ATTENTION 0x08 // Assert SCSI attention line
66: #define C_ARBITRATION 0x10 // Start arbitration
67: #define C_PARITY_ENABLE 0x20 // Parity enable
68: #define C_INT_ENABLE 0x40 // Enable interrupt
69: #define C_BUS_ENABLE 0x80 // Bus enable
70:
71: //
72: // Input status bit definitions.
73: //
74: #define S_BUSY 0x01 // Busy line from SCSI bus
75: #define S_MESSAGE 0x02 // Message line from SCSI bus
76: #define S_IO 0x04 // Input/Output line from SCSI bus
77: #define S_CD 0x08 // Command/Data line from SCSI bus
78: #define S_REQUEST 0x10 // Request line from SCSI bus
79: #define S_SELECT 0x20 // Select line from SCSI bus
80: #define S_PARITY 0x40 // Parity error status
81: #define S_ARB_COMPLETE 0x80 // Arbitration complete
82:
83: //
84: // Useful status combinations.
85: //
86: #define BP_BUS_FREE 0
87: #define BP_COMMAND ( S_BUSY | S_CD | S_REQUEST )
88: #define BP_MESSAGE_IN ( S_BUSY | S_MESSAGE | S_IO | S_CD | S_REQUEST )
89: #define BP_MESSAGE_OUT ( S_BUSY | S_MESSAGE | S_CD | S_REQUEST )
90: #define BP_DATA_IN ( S_BUSY | S_IO | S_REQUEST )
91: #define BP_DATA_OUT ( S_BUSY | S_REQUEST )
92: #define BP_STATUS ( S_BUSY | S_IO | S_CD | S_REQUEST )
93: #define BP_RESELECT ( S_SELECT | S_IO )
94:
95: //
96: // Status mask for bus phase. This is everything except Parity and
97: // Arbitration complete.
98: //
99: #define S_PHASE_MASK ((UCHAR) 0x3F)
100:
101: #define FD8XX_READ_PHASE(BASE) ((UCHAR) (FD8XX_READ_STATUS(BASE) & S_PHASE_MASK))
102:
103: //
104: // Interrupt definition.
105: //
106: #define FD8XX_IDT_VECTOR 5
107:
108: //
109: // SCSI source identifier for host system.
110: //
111: #define SCSI_INITIATOR_ID 7
112:
113: //
114: // Various timeout values (in microseconds).
115: //
116: #define REQUEST_SPIN_WAIT 1000000 // Wait for target to assert REQUEST
117: #define RESET_HOLD_TIME 25 // Time to hold RESET line to reset bus
118: #define SELECTION_DELAY 100000 // Wait for target to assert BUSY
119: #define RESELECTION_WAIT 100000 // Wait for target to de-assert BUSY
120: #define ARBITRATION_DELAY 3 // Wait for arbitration complete
121: #define FD8xx_TIMER_VALUE 10000 // Time for timer to fire
122:
123:
124: //
125: // Various limits...
126: //
127:
128: //
129: // Number of adapters this driver will support.
130: //
131: #define MAX_ADAPTERS 4
132:
133: //
134: // Actually there is no limit to the transfer size, but since the I/O area
135: // has to be mapped into memory for the transfer we restrict it to the
136: // number below.
137: //
138: #define MAX_TRANSFER_LENGTH ( 64 * 1024 )
139:
140: //
141: // Size of the memory-mapped SCSI data register on the adapter.
142: //
143: #define MAX_BUFFER_LENGTH 0x200
144: #define MAX_HEAD_LENGTH 0x10
145: #define MAX_TAIL_LENGTH 0x01
146:
147: //
148: // Number of times to attempt arbitration before giving up.
149: //
150: #define MAX_ARB_ATTEMPTS 150
151:
152: #define min(l, r) (((l) < (r)) ? (l) : (r))
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