1#define AUTOSENSE
2/* #define PSEUDO_DMA */
3
4/*
5 * EcoSCSI Generic NCR5380 driver
6 *
7 * Copyright 1995, Russell King
8 *
9 * ALPHA RELEASE 1.
10 *
11 * For more information, please consult
12 *
13 * NCR 5380 Family
14 * SCSI Protocol Controller
15 * Databook
16 *
17 * NCR Microelectronics
18 * 1635 Aeroplaza Drive
19 * Colorado Springs, CO 80916
20 * 1+ (719) 578-3400
21 * 1+ (800) 334-5454
22 */
23
24#include <linux/module.h>
25#include <linux/signal.h>
26#include <linux/ioport.h>
27#include <linux/delay.h>
28#include <linux/init.h>
29#include <linux/blkdev.h>
30
31#include <asm/io.h>
32#include <asm/system.h>
33
34#include "../scsi.h"
35#include <scsi/scsi_host.h>
36
37#define NCR5380_implementation_fields	int port, ctrl
38#define NCR5380_local_declare()		struct Scsi_Host *_instance
39#define NCR5380_setup(instance)		_instance = instance
40
41#define NCR5380_read(reg)		ecoscsi_read(_instance, reg)
42#define NCR5380_write(reg, value)	ecoscsi_write(_instance, reg, value)
43
44#define NCR5380_intr			ecoscsi_intr
45#define NCR5380_queue_command		ecoscsi_queue_command
46#define NCR5380_proc_info		ecoscsi_proc_info
47
48#include "../NCR5380.h"
49
50#define ECOSCSI_PUBLIC_RELEASE 1
51
52static char ecoscsi_read(struct Scsi_Host *instance, int reg)
53{
54  int iobase = instance->io_port;
55  outb(reg | 8, iobase);
56  return inb(iobase + 1);
57}
58
59static void ecoscsi_write(struct Scsi_Host *instance, int reg, int value)
60{
61  int iobase = instance->io_port;
62  outb(reg | 8, iobase);
63  outb(value, iobase + 1);
64}
65
66/*
67 * Function : ecoscsi_setup(char *str, int *ints)
68 *
69 * Purpose : LILO command line initialization of the overrides array,
70 *
71 * Inputs : str - unused, ints - array of integer parameters with ints[0]
72 *	equal to the number of ints.
73 *
74 */
75
76void ecoscsi_setup(char *str, int *ints)
77{
78}
79
80const char * ecoscsi_info (struct Scsi_Host *spnt)
81{
82	return "";
83}
84
85#undef STAT
86
87#define BOARD_NORMAL	0
88#define BOARD_NCR53C400	1
89
90#include "../NCR5380.c"
91
92static struct scsi_host_template ecoscsi_template =  {
93	.module		= THIS_MODULE,
94	.name		= "Serial Port EcoSCSI NCR5380",
95	.proc_name	= "ecoscsi",
96	.info		= ecoscsi_info,
97	.queuecommand	= ecoscsi_queue_command,
98	.eh_abort_handler	= NCR5380_abort,
99	.eh_bus_reset_handler	= NCR5380_bus_reset,
100	.can_queue	= 16,
101	.this_id	= 7,
102	.sg_tablesize	= SG_ALL,
103	.cmd_per_lun	= 2,
104	.use_clustering	= DISABLE_CLUSTERING
105};
106
107static struct Scsi_Host *host;
108
109static int __init ecoscsi_init(void)
110{
111
112	host = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
113	if (!host)
114		return 0;
115
116	host->io_port = 0x80ce8000;
117	host->n_io_port = 144;
118	host->irq = IRQ_NONE;
119
120	if (!(request_region(host->io_port, host->n_io_port, "ecoscsi")) )
121		goto unregister_scsi;
122
123	ecoscsi_write(host, MODE_REG, 0x20);		/* Is it really SCSI? */
124	if (ecoscsi_read(host, MODE_REG) != 0x20) /* Write to a reg.    */
125		goto release_reg;
126
127	ecoscsi_write(host, MODE_REG, 0x00 );		/* it back.	      */
128	if (ecoscsi_read(host, MODE_REG) != 0x00)
129		goto release_reg;
130
131	NCR5380_init(host, 0);
132
133	printk("scsi%d: at port 0x%08lx irqs disabled", host->host_no, host->io_port);
134	printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
135		host->can_queue, host->cmd_per_lun, ECOSCSI_PUBLIC_RELEASE);
136	printk("\nscsi%d:", host->host_no);
137	NCR5380_print_options(host);
138	printk("\n");
139
140	scsi_add_host(host, NULL);
141	scsi_scan_host(host);
142	return 0;
143
144release_reg:
145	release_region(host->io_port, host->n_io_port);
146unregister_scsi:
147	scsi_host_put(host);
148	return -ENODEV;
149}
150
151static void __exit ecoscsi_exit(void)
152{
153	scsi_remove_host(host);
154
155	if (shpnt->irq != IRQ_NONE)
156		free_irq(shpnt->irq, NULL);
157	NCR5380_exit(host);
158	if (shpnt->io_port)
159		release_region(shpnt->io_port, shpnt->n_io_port);
160
161	scsi_host_put(host);
162	return 0;
163}
164
165module_init(ecoscsi_init);
166module_exit(ecoscsi_exit);
167
168MODULE_AUTHOR("Russell King");
169MODULE_DESCRIPTION("Econet-SCSI driver for Acorn machines");
170MODULE_LICENSE("GPL");
171