tjh.dev
Linux kernel mirror (for testing)
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1/*
2 * This driver adapted from Drew Eckhardt's Trantor T128 driver
3 *
4 * Copyright 1993, Drew Eckhardt
5 * Visionary Computing
6 * (Unix and Linux consulting and custom programming)
7 * drew@colorado.edu
8 * +1 (303) 666-5836
9 *
10 * ( Based on T128 - DISTRIBUTION RELEASE 3. )
11 *
12 * Modified to work with the Pro Audio Spectrum/Studio 16
13 * by John Weidman.
14 *
15 *
16 * For more information, please consult
17 *
18 * Media Vision
19 * (510) 770-8600
20 * (800) 348-7116
21 *
22 * and
23 *
24 * NCR 5380 Family
25 * SCSI Protocol Controller
26 * Databook
27 *
28 * NCR Microelectronics
29 * 1635 Aeroplaza Drive
30 * Colorado Springs, CO 80916
31 * 1+ (719) 578-3400
32 * 1+ (800) 334-5454
33 */
34
35
36#ifndef PAS16_H
37#define PAS16_H
38
39#define PAS16_PUBLIC_RELEASE 3
40
41#define PDEBUG_INIT 0x1
42#define PDEBUG_TRANSFER 0x2
43
44#define PAS16_DEFAULT_BASE_1 0x388
45#define PAS16_DEFAULT_BASE_2 0x384
46#define PAS16_DEFAULT_BASE_3 0x38c
47#define PAS16_DEFAULT_BASE_4 0x288
48
49#define PAS16_DEFAULT_BOARD_1_IRQ 10
50#define PAS16_DEFAULT_BOARD_2_IRQ 12
51#define PAS16_DEFAULT_BOARD_3_IRQ 14
52#define PAS16_DEFAULT_BOARD_4_IRQ 15
53
54
55/*
56 * The Pro Audio Spectrum boards are I/O mapped. They use a Zilog 5380
57 * SCSI controller, which is the equivalent of NCR's 5380. "Pseudo-DMA"
58 * architecture is used, where a PAL drives the DMA signals on the 5380
59 * allowing fast, blind transfers with proper handshaking.
60 */
61
62
63/* The Time-out Counter register is used to safe-guard against a stuck
64 * bus (in the case of RDY driven handshake) or a stuck byte (if 16-Bit
65 * DMA conversion is used). The counter uses a 28.224MHz clock
66 * divided by 14 as its clock source. In the case of a stuck byte in
67 * the holding register, an interrupt is generated (and mixed with the
68 * one with the drive) using the CD-ROM interrupt pointer.
69 */
70
71#define P_TIMEOUT_COUNTER_REG 0x4000
72#define P_TC_DISABLE 0x80 /* Set to 0 to enable timeout int. */
73 /* Bits D6-D0 contain timeout count */
74
75
76#define P_TIMEOUT_STATUS_REG_OFFSET 0x4001
77#define P_TS_TIM 0x80 /* check timeout status */
78 /* Bits D6-D4 N/U */
79#define P_TS_ARM_DRQ_INT 0x08 /* Arm DRQ Int. When set high,
80 * the next rising edge will
81 * cause a CD-ROM interrupt.
82 * When set low, the interrupt
83 * will be cleared. There is
84 * no status available for
85 * this interrupt.
86 */
87#define P_TS_ENABLE_TO_ERR_INTERRUPT /* Enable timeout error int. */
88#define P_TS_ENABLE_WAIT /* Enable Wait */
89
90#define P_TS_CT 0x01 /* clear timeout. Note: writing
91 * to this register clears the
92 * timeout error int. or status
93 */
94
95
96/*
97 * The data register reads/writes to/from the 5380 in pseudo-DMA mode
98 */
99
100#define P_DATA_REG_OFFSET 0x5c00 /* rw */
101
102#define P_STATUS_REG_OFFSET 0x5c01 /* ro */
103#define P_ST_RDY 0x80 /* 5380 DDRQ Status */
104
105#define P_IRQ_STATUS 0x5c03
106#define P_IS_IRQ 0x80 /* DIRQ status */
107
108#define PCB_CONFIG 0x803
109#define MASTER_ADDRESS_PTR 0x9a01 /* Fixed position - no relo */
110#define SYS_CONFIG_4 0x8003
111#define WAIT_STATE 0xbc00
112#define OPERATION_MODE_1 0xec03
113#define IO_CONFIG_3 0xf002
114
115
116#ifndef ASM
117static int pas16_abort(Scsi_Cmnd *);
118static int pas16_biosparam(struct scsi_device *, struct block_device *,
119 sector_t, int*);
120static int pas16_detect(Scsi_Host_Template *);
121static int pas16_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
122static int pas16_bus_reset(Scsi_Cmnd *);
123static int pas16_host_reset(Scsi_Cmnd *);
124static int pas16_device_reset(Scsi_Cmnd *);
125
126#ifndef CMD_PER_LUN
127#define CMD_PER_LUN 2
128#endif
129
130#ifndef CAN_QUEUE
131#define CAN_QUEUE 32
132#endif
133
134#ifndef HOSTS_C
135
136#define NCR5380_implementation_fields \
137 volatile unsigned short io_port
138
139#define NCR5380_local_declare() \
140 volatile unsigned short io_port
141
142#define NCR5380_setup(instance) \
143 io_port = (instance)->io_port
144
145#define PAS16_io_port(reg) ( io_port + pas16_offset[(reg)] )
146
147#if !(PDEBUG & PDEBUG_TRANSFER)
148#define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) )
149#define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) )
150#else
151#define NCR5380_read(reg) \
152 (((unsigned char) printk("scsi%d : read register %d at io_port %04x\n"\
153 , instance->hostno, (reg), PAS16_io_port(reg))), inb( PAS16_io_port(reg)) )
154
155#define NCR5380_write(reg, value) \
156 (printk("scsi%d : write %02x to register %d at io_port %04x\n", \
157 instance->hostno, (value), (reg), PAS16_io_port(reg)), \
158 outb( (value),PAS16_io_port(reg) ) )
159
160#endif
161
162
163#define NCR5380_intr pas16_intr
164#define do_NCR5380_intr do_pas16_intr
165#define NCR5380_queue_command pas16_queue_command
166#define NCR5380_abort pas16_abort
167#define NCR5380_device_reset pas16_device_reset
168#define NCR5380_bus_reset pas16_bus_reset
169#define NCR5380_host_reset pas16_host_reset
170#define NCR5380_proc_info pas16_proc_info
171
172/* 15 14 12 10 7 5 3
173 1101 0100 1010 1000 */
174
175#define PAS16_IRQS 0xd4a8
176
177#endif /* else def HOSTS_C */
178#endif /* ndef ASM */
179#endif /* PAS16_H */