aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/pas16.h
blob: 8dc5b1a5f5da7ebacdbedbdbc9a8b5b9a135d42b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/*
 * This driver adapted from Drew Eckhardt's Trantor T128 driver
 *
 * Copyright 1993, Drew Eckhardt
 *	Visionary Computing
 *	(Unix and Linux consulting and custom programming)
 *	drew@colorado.edu
 *      +1 (303) 666-5836
 *
 *  ( Based on T128 - DISTRIBUTION RELEASE 3. ) 
 *
 * Modified to work with the Pro Audio Spectrum/Studio 16
 * by John Weidman.
 *
 *
 * For more information, please consult 
 *
 * Media Vision
 * (510) 770-8600
 * (800) 348-7116
 * 
 * and 
 *
 * NCR 5380 Family
 * SCSI Protocol Controller
 * Databook
 *
 * NCR Microelectronics
 * 1635 Aeroplaza Drive
 * Colorado Springs, CO 80916
 * 1+ (719) 578-3400
 * 1+ (800) 334-5454
 */


#ifndef PAS16_H
#define PAS16_H

#define PAS16_PUBLIC_RELEASE 3

#define PDEBUG_INIT	0x1
#define PDEBUG_TRANSFER 0x2

#define PAS16_DEFAULT_BASE_1  0x388
#define PAS16_DEFAULT_BASE_2  0x384
#define PAS16_DEFAULT_BASE_3  0x38c
#define PAS16_DEFAULT_BASE_4  0x288

#define PAS16_DEFAULT_BOARD_1_IRQ 10
#define PAS16_DEFAULT_BOARD_2_IRQ 12
#define PAS16_DEFAULT_BOARD_3_IRQ 14
#define PAS16_DEFAULT_BOARD_4_IRQ 15


/*
 * The Pro Audio Spectrum boards are I/O mapped. They use a Zilog 5380
 * SCSI controller, which is the equivalent of NCR's 5380.  "Pseudo-DMA"
 * architecture is used, where a PAL drives the DMA signals on the 5380
 * allowing fast, blind transfers with proper handshaking. 
 */


/* The Time-out Counter register is used to safe-guard against a stuck
 * bus (in the case of RDY driven handshake) or a stuck byte (if 16-Bit
 * DMA conversion is used).  The counter uses a 28.224MHz clock
 * divided by 14 as its clock source.  In the case of a stuck byte in
 * the holding register, an interrupt is generated (and mixed with the
 * one with the drive) using the CD-ROM interrupt pointer.
 */
 
#define P_TIMEOUT_COUNTER_REG	0x4000
#define P_TC_DISABLE	0x80	/* Set to 0 to enable timeout int. */
				/* Bits D6-D0 contain timeout count */


#define P_TIMEOUT_STATUS_REG_OFFSET	0x4001
#define P_TS_TIM		0x80	/* check timeout status */
					/* Bits D6-D4 N/U */
#define P_TS_ARM_DRQ_INT	0x08	/* Arm DRQ Int.  When set high,
					 * the next rising edge will
					 * cause a CD-ROM interrupt.
					 * When set low, the interrupt
					 * will be cleared.  There is
					 * no status available for
					 * this interrupt.
					 */
#define P_TS_ENABLE_TO_ERR_INTERRUPT	/* Enable timeout error int. */
#define P_TS_ENABLE_WAIT		/* Enable Wait */

#define P_TS_CT			0x01	/* clear timeout. Note: writing
					 * to this register clears the
					 * timeout error int. or status
					 */


/*
 * The data register reads/writes to/from the 5380 in pseudo-DMA mode
 */ 

#define P_DATA_REG_OFFSET	0x5c00	/* rw */

#define P_STATUS_REG_OFFSET	0x5c01	/* ro */
#define P_ST_RDY		0x80	/* 5380 DDRQ Status */

#define P_IRQ_STATUS		0x5c03
#define P_IS_IRQ		0x80	/* DIRQ status */

#define PCB_CONFIG 0x803
#define MASTER_ADDRESS_PTR 0x9a01  /* Fixed position - no relo */
#define SYS_CONFIG_4 0x8003
#define WAIT_STATE 0xbc00
#define OPERATION_MODE_1 0xec03
#define IO_CONFIG_3 0xf002


#ifndef ASM
static int pas16_abort(Scsi_Cmnd *);
static int pas16_biosparam(struct scsi_device *, struct block_device *,
			   sector_t, int*);
static int pas16_detect(struct scsi_host_template *);
static int pas16_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
static int pas16_bus_reset(Scsi_Cmnd *);

#ifndef CMD_PER_LUN
#define CMD_PER_LUN 2
#endif

#ifndef CAN_QUEUE
#define CAN_QUEUE 32 
#endif

#ifndef HOSTS_C

#define NCR5380_implementation_fields \
    volatile unsigned short io_port

#define NCR5380_local_declare() \
    volatile unsigned short io_port

#define NCR5380_setup(instance) \
    io_port = (instance)->io_port

#define PAS16_io_port(reg) ( io_port + pas16_offset[(reg)] )

#if !(PDEBUG & PDEBUG_TRANSFER) 
#define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) )
#define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) )
#else
#define NCR5380_read(reg)						\
    (((unsigned char) printk("scsi%d : read register %d at io_port %04x\n"\
    , instance->hostno, (reg), PAS16_io_port(reg))), inb( PAS16_io_port(reg)) )

#define NCR5380_write(reg, value) 					\
    (printk("scsi%d : write %02x to register %d at io_port %04x\n", 	\
	    instance->hostno, (value), (reg), PAS16_io_port(reg)),	\
    outb( (value),PAS16_io_port(reg) ) )

#endif


#define NCR5380_intr pas16_intr
#define do_NCR5380_intr do_pas16_intr
#define NCR5380_queue_command pas16_queue_command
#define NCR5380_abort pas16_abort
#define NCR5380_bus_reset pas16_bus_reset
#define NCR5380_proc_info pas16_proc_info

/* 15 14 12 10 7 5 3 
   1101 0100 1010 1000 */
   
#define PAS16_IRQS 0xd4a8 

#endif /* else def HOSTS_C */
#endif /* ndef ASM */
#endif /* PAS16_H */