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/sched.h>
27 #include <linux/ioport.h>
28 #include <linux/delay.h>
29 #include <linux/init.h>
30 #include <linux/blkdev.h>
31
32 #include <asm/io.h>
33 #include <asm/system.h>
34
35 #include "../scsi.h"
36 #include <scsi/scsi_host.h>
37
38 #define NCR5380_implementation_fields int port, ctrl
39 #define NCR5380_local_declare() struct Scsi_Host *_instance
40 #define NCR5380_setup(instance) _instance = instance
41
42 #define NCR5380_read(reg) ecoscsi_read(_instance, reg)
43 #define NCR5380_write(reg, value) ecoscsi_write(_instance, reg, value)
44
45 #define NCR5380_intr ecoscsi_intr
46 #define NCR5380_queue_command ecoscsi_queue_command
47 #define NCR5380_proc_info ecoscsi_proc_info
48
49 #include "../NCR5380.h"
50
51 #define ECOSCSI_PUBLIC_RELEASE 1
52
53 static char ecoscsi_read(struct Scsi_Host *instance, int reg)
54 {
55 int iobase = instance->io_port;
56 outb(reg | 8, iobase);
57 return inb(iobase + 1);
58 }
59
60 static void ecoscsi_write(struct Scsi_Host *instance, int reg, int value)
61 {
62 int iobase = instance->io_port;
63 outb(reg | 8, iobase);
64 outb(value, iobase + 1);
65 }
66
67 /*
68 * Function : ecoscsi_setup(char *str, int *ints)
69 *
70 * Purpose : LILO command line initialization of the overrides array,
71 *
72 * Inputs : str - unused, ints - array of integer parameters with ints[0]
73 * equal to the number of ints.
74 *
75 */
76
77 void ecoscsi_setup(char *str, int *ints)
78 {
79 }
80
81 const char * ecoscsi_info (struct Scsi_Host *spnt)
82 {
83 return "";
84 }
85
86 #if 0
87 #define STAT(p) inw(p + 144)
88
89 static inline int NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr,
90 int len)
91 {
92 int iobase = host->io_port;
93 printk("writing %p len %d\n",addr, len);
94 if(!len) return -1;
95
96 while(1)
97 {
98 int status;
99 while(((status = STAT(iobase)) & 0x100)==0);
100 }
101 }
102
103 static inline int NCR5380_pread(struct Scsi_Host *host, unsigned char *addr,
104 int len)
105 {
106 int iobase = host->io_port;
107 int iobase2= host->io_port + 0x100;
108 unsigned char *start = addr;
109 int s;
110 printk("reading %p len %d\n",addr, len);
111 outb(inb(iobase + 128), iobase + 135);
112 while(len > 0)
113 {
114 int status,b,i, timeout;
115 timeout = 0x07FFFFFF;
116 while(((status = STAT(iobase)) & 0x100)==0)
117 {
118 timeout--;
119 if(status & 0x200 || !timeout)
120 {
121 printk("status = %p\n",status);
122 outb(0, iobase + 135);
123 return 1;
124 }
125 }
126 if(len >= 128)
127 {
128 for(i=0; i<64; i++)
129 {
130 b = inw(iobase + 136);
131 *addr++ = b;
132 *addr++ = b>>8;
133 }
134 len -= 128;
135 }
136 else
137 {
138 b = inw(iobase + 136);
139 *addr ++ = b;
140 len -= 1;
141 if(len)
142 *addr ++ = b>>8;
143 len -= 1;
144 }
145 }
146 outb(0, iobase + 135);
147 printk("first bytes = %02X %02X %02X %20X %02X %02X %02X\n",*start, start[1], start[2], start[3], start[4], start[5], start[6]);
148 return 1;
149 }
150 #endif
151 #undef STAT
152
153 #define BOARD_NORMAL 0
154 #define BOARD_NCR53C400 1
155
156 #include "../NCR5380.c"
157
158 static Scsi_Host_Template ecoscsi_template = {
159 .module = THIS_MODULE,
160 .name = "Serial Port EcoSCSI NCR5380",
161 .proc_name = "ecoscsi",
162 .info = ecoscsi_info,
163 .queuecommand = ecoscsi_queue_command,
164 .eh_abort_handler = NCR5380_abort,
165 .eh_device_reset_handler= NCR5380_device_reset,
166 .eh_bus_reset_handler = NCR5380_bus_reset,
167 .eh_host_reset_handler = NCR5380_host_reset,
168 .can_queue = 16,
169 .this_id = 7,
170 .sg_tablesize = SG_ALL,
171 .cmd_per_lun = 2,
172 .use_clustering = DISABLE_CLUSTERING
173 };
174
175 static struct Scsi_Host *host;
176
177 static int __init ecoscsi_init(void)
178 {
179
180 host = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
181 if (!host)
182 return 0;
183
184 host->io_port = 0x80ce8000;
185 host->n_io_port = 144;
186 host->irq = IRQ_NONE;
187
188 if (!(request_region(host->io_port, host->n_io_port, "ecoscsi")) )
189 goto unregister_scsi;
190
191 ecoscsi_write(host, MODE_REG, 0x20); /* Is it really SCSI? */
192 if (ecoscsi_read(host, MODE_REG) != 0x20) /* Write to a reg. */
193 goto release_reg;
194
195 ecoscsi_write(host, MODE_REG, 0x00 ); /* it back. */
196 if (ecoscsi_read(host, MODE_REG) != 0x00)
197 goto release_reg;
198
199 NCR5380_init(host, 0);
200
201 printk("scsi%d: at port 0x%08lx irqs disabled", host->host_no, host->io_port);
202 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
203 host->can_queue, host->cmd_per_lun, ECOSCSI_PUBLIC_RELEASE);
204 printk("\nscsi%d:", host->host_no);
205 NCR5380_print_options(host);
206 printk("\n");
207
208 scsi_add_host(host, NULL); /* XXX handle failure */
209 scsi_scan_host(host);
210 return 0;
211
212 release_reg:
213 release_region(host->io_port, host->n_io_port);
214 unregister_scsi:
215 scsi_host_put(host);
216 return -ENODEV;
217 }
218
219 static void __exit ecoscsi_exit(void)
220 {
221 scsi_remove_host(host);
222
223 if (shpnt->irq != IRQ_NONE)
224 free_irq(shpnt->irq, NULL);
225 NCR5380_exit(host);
226 if (shpnt->io_port)
227 release_region(shpnt->io_port, shpnt->n_io_port);
228
229 scsi_host_put(host);
230 return 0;
231 }
232
233 module_init(ecoscsi_init);
234 module_exit(ecoscsi_exit);
235
236 MODULE_AUTHOR("Russell King");
237 MODULE_DESCRIPTION("Econet-SCSI driver for Acorn machines");
238 MODULE_LICENSE("GPL");
239
240
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