blob: 378e7af0c5d6760750fe18c9105b1707fdf05527 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#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#if 0
86#define STAT(p) inw(p + 144)
87
88static inline int NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr,
89 int len)
90{
91 int iobase = host->io_port;
92printk("writing %p len %d\n",addr, len);
93 if(!len) return -1;
94
95 while(1)
96 {
97 int status;
98 while(((status = STAT(iobase)) & 0x100)==0);
99 }
100}
101
102static inline int NCR5380_pread(struct Scsi_Host *host, unsigned char *addr,
103 int len)
104{
105 int iobase = host->io_port;
106 int iobase2= host->io_port + 0x100;
107 unsigned char *start = addr;
108 int s;
109printk("reading %p len %d\n",addr, len);
110 outb(inb(iobase + 128), iobase + 135);
111 while(len > 0)
112 {
113 int status,b,i, timeout;
114 timeout = 0x07FFFFFF;
115 while(((status = STAT(iobase)) & 0x100)==0)
116 {
117 timeout--;
118 if(status & 0x200 || !timeout)
119 {
120 printk("status = %p\n",status);
121 outb(0, iobase + 135);
122 return 1;
123 }
124 }
125 if(len >= 128)
126 {
127 for(i=0; i<64; i++)
128 {
129 b = inw(iobase + 136);
130 *addr++ = b;
131 *addr++ = b>>8;
132 }
133 len -= 128;
134 }
135 else
136 {
137 b = inw(iobase + 136);
138 *addr ++ = b;
139 len -= 1;
140 if(len)
141 *addr ++ = b>>8;
142 len -= 1;
143 }
144 }
145 outb(0, iobase + 135);
146 printk("first bytes = %02X %02X %02X %20X %02X %02X %02X\n",*start, start[1], start[2], start[3], start[4], start[5], start[6]);
147 return 1;
148}
149#endif
150#undef STAT
151
152#define BOARD_NORMAL 0
153#define BOARD_NCR53C400 1
154
155#include "../NCR5380.c"
156
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +0100157static struct scsi_host_template ecoscsi_template = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 .module = THIS_MODULE,
159 .name = "Serial Port EcoSCSI NCR5380",
160 .proc_name = "ecoscsi",
161 .info = ecoscsi_info,
162 .queuecommand = ecoscsi_queue_command,
163 .eh_abort_handler = NCR5380_abort,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 .eh_bus_reset_handler = NCR5380_bus_reset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 .can_queue = 16,
166 .this_id = 7,
167 .sg_tablesize = SG_ALL,
168 .cmd_per_lun = 2,
169 .use_clustering = DISABLE_CLUSTERING
170};
171
172static struct Scsi_Host *host;
173
174static int __init ecoscsi_init(void)
175{
176
177 host = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
178 if (!host)
179 return 0;
180
181 host->io_port = 0x80ce8000;
182 host->n_io_port = 144;
183 host->irq = IRQ_NONE;
184
185 if (!(request_region(host->io_port, host->n_io_port, "ecoscsi")) )
186 goto unregister_scsi;
187
188 ecoscsi_write(host, MODE_REG, 0x20); /* Is it really SCSI? */
189 if (ecoscsi_read(host, MODE_REG) != 0x20) /* Write to a reg. */
190 goto release_reg;
191
192 ecoscsi_write(host, MODE_REG, 0x00 ); /* it back. */
193 if (ecoscsi_read(host, MODE_REG) != 0x00)
194 goto release_reg;
195
196 NCR5380_init(host, 0);
197
198 printk("scsi%d: at port 0x%08lx irqs disabled", host->host_no, host->io_port);
199 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
200 host->can_queue, host->cmd_per_lun, ECOSCSI_PUBLIC_RELEASE);
201 printk("\nscsi%d:", host->host_no);
202 NCR5380_print_options(host);
203 printk("\n");
204
205 scsi_add_host(host, NULL); /* XXX handle failure */
206 scsi_scan_host(host);
207 return 0;
208
209release_reg:
210 release_region(host->io_port, host->n_io_port);
211unregister_scsi:
212 scsi_host_put(host);
213 return -ENODEV;
214}
215
216static void __exit ecoscsi_exit(void)
217{
218 scsi_remove_host(host);
219
220 if (shpnt->irq != IRQ_NONE)
221 free_irq(shpnt->irq, NULL);
222 NCR5380_exit(host);
223 if (shpnt->io_port)
224 release_region(shpnt->io_port, shpnt->n_io_port);
225
226 scsi_host_put(host);
227 return 0;
228}
229
230module_init(ecoscsi_init);
231module_exit(ecoscsi_exit);
232
233MODULE_AUTHOR("Russell King");
234MODULE_DESCRIPTION("Econet-SCSI driver for Acorn machines");
235MODULE_LICENSE("GPL");
236