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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
#define AUTOSENSE
/* #define PSEUDO_DMA */
/*
* EcoSCSI Generic NCR5380 driver
*
* Copyright 1995, Russell King
*
* ALPHA RELEASE 1.
*
* For more information, please consult
*
* NCR 5380 Family
* SCSI Protocol Controller
* Databook
*
* NCR Microelectronics
* 1635 Aeroplaza Drive
* Colorado Springs, CO 80916
* 1+ (719) 578-3400
* 1+ (800) 334-5454
*/
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <asm/io.h>
#include <asm/system.h>
#include "../scsi.h"
#include <scsi/scsi_host.h>
#define NCR5380_implementation_fields int port, ctrl
#define NCR5380_local_declare() struct Scsi_Host *_instance
#define NCR5380_setup(instance) _instance = instance
#define NCR5380_read(reg) ecoscsi_read(_instance, reg)
#define NCR5380_write(reg, value) ecoscsi_write(_instance, reg, value)
#define NCR5380_intr ecoscsi_intr
#define NCR5380_queue_command ecoscsi_queue_command
#define NCR5380_proc_info ecoscsi_proc_info
#include "../NCR5380.h"
#define ECOSCSI_PUBLIC_RELEASE 1
static char ecoscsi_read(struct Scsi_Host *instance, int reg)
{
int iobase = instance->io_port;
outb(reg | 8, iobase);
return inb(iobase + 1);
}
static void ecoscsi_write(struct Scsi_Host *instance, int reg, int value)
{
int iobase = instance->io_port;
outb(reg | 8, iobase);
outb(value, iobase + 1);
}
/*
* Function : ecoscsi_setup(char *str, int *ints)
*
* Purpose : LILO command line initialization of the overrides array,
*
* Inputs : str - unused, ints - array of integer parameters with ints[0]
* equal to the number of ints.
*
*/
void ecoscsi_setup(char *str, int *ints)
{
}
const char * ecoscsi_info (struct Scsi_Host *spnt)
{
return "";
}
#if 0
#define STAT(p) inw(p + 144)
static inline int NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr,
int len)
{
int iobase = host->io_port;
printk("writing %p len %d\n",addr, len);
if(!len) return -1;
while(1)
{
int status;
while(((status = STAT(iobase)) & 0x100)==0);
}
}
static inline int NCR5380_pread(struct Scsi_Host *host, unsigned char *addr,
int len)
{
int iobase = host->io_port;
int iobase2= host->io_port + 0x100;
unsigned char *start = addr;
int s;
printk("reading %p len %d\n",addr, len);
outb(inb(iobase + 128), iobase + 135);
while(len > 0)
{
int status,b,i, timeout;
timeout = 0x07FFFFFF;
while(((status = STAT(iobase)) & 0x100)==0)
{
timeout--;
if(status & 0x200 || !timeout)
{
printk("status = %p\n",status);
outb(0, iobase + 135);
return 1;
}
}
if(len >= 128)
{
for(i=0; i<64; i++)
{
b = inw(iobase + 136);
*addr++ = b;
*addr++ = b>>8;
}
len -= 128;
}
else
{
b = inw(iobase + 136);
*addr ++ = b;
len -= 1;
if(len)
*addr ++ = b>>8;
len -= 1;
}
}
outb(0, iobase + 135);
printk("first bytes = %02X %02X %02X %20X %02X %02X %02X\n",*start, start[1], start[2], start[3], start[4], start[5], start[6]);
return 1;
}
#endif
#undef STAT
#define BOARD_NORMAL 0
#define BOARD_NCR53C400 1
#include "../NCR5380.c"
static Scsi_Host_Template ecoscsi_template = {
.module = THIS_MODULE,
.name = "Serial Port EcoSCSI NCR5380",
.proc_name = "ecoscsi",
.info = ecoscsi_info,
.queuecommand = ecoscsi_queue_command,
.eh_abort_handler = NCR5380_abort,
.eh_device_reset_handler= NCR5380_device_reset,
.eh_bus_reset_handler = NCR5380_bus_reset,
.eh_host_reset_handler = NCR5380_host_reset,
.can_queue = 16,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING
};
static struct Scsi_Host *host;
static int __init ecoscsi_init(void)
{
host = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
if (!host)
return 0;
host->io_port = 0x80ce8000;
host->n_io_port = 144;
host->irq = IRQ_NONE;
if (!(request_region(host->io_port, host->n_io_port, "ecoscsi")) )
goto unregister_scsi;
ecoscsi_write(host, MODE_REG, 0x20); /* Is it really SCSI? */
if (ecoscsi_read(host, MODE_REG) != 0x20) /* Write to a reg. */
goto release_reg;
ecoscsi_write(host, MODE_REG, 0x00 ); /* it back. */
if (ecoscsi_read(host, MODE_REG) != 0x00)
goto release_reg;
NCR5380_init(host, 0);
printk("scsi%d: at port 0x%08lx irqs disabled", host->host_no, host->io_port);
printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
host->can_queue, host->cmd_per_lun, ECOSCSI_PUBLIC_RELEASE);
printk("\nscsi%d:", host->host_no);
NCR5380_print_options(host);
printk("\n");
scsi_add_host(host, NULL); /* XXX handle failure */
scsi_scan_host(host);
return 0;
release_reg:
release_region(host->io_port, host->n_io_port);
unregister_scsi:
scsi_host_put(host);
return -ENODEV;
}
static void __exit ecoscsi_exit(void)
{
scsi_remove_host(host);
if (shpnt->irq != IRQ_NONE)
free_irq(shpnt->irq, NULL);
NCR5380_exit(host);
if (shpnt->io_port)
release_region(shpnt->io_port, shpnt->n_io_port);
scsi_host_put(host);
return 0;
}
module_init(ecoscsi_init);
module_exit(ecoscsi_exit);
MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("Econet-SCSI driver for Acorn machines");
MODULE_LICENSE("GPL");
|
