1
2
3
4
5
6#include <linux/module.h>
7#include <linux/signal.h>
8#include <linux/ioport.h>
9#include <linux/delay.h>
10#include <linux/blkdev.h>
11#include <linux/init.h>
12
13#include <asm/ecard.h>
14#include <asm/io.h>
15
16#include <scsi/scsi_host.h>
17
18#include <scsi/scsicam.h>
19
20#define PSEUDO_DMA
21
22#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
23#define NCR5380_local_declare() struct Scsi_Host *_instance
24#define NCR5380_setup(instance) _instance = instance
25#define NCR5380_read(reg) cumanascsi_read(_instance, reg)
26#define NCR5380_write(reg, value) cumanascsi_write(_instance, reg, value)
27#define NCR5380_intr cumanascsi_intr
28#define NCR5380_queue_command cumanascsi_queue_command
29#define NCR5380_info cumanascsi_info
30
31#define NCR5380_implementation_fields \
32 unsigned ctrl; \
33 void __iomem *base; \
34 void __iomem *dma
35
36#include "../NCR5380.h"
37
38void cumanascsi_setup(char *str, int *ints)
39{
40}
41
42#define CTRL 0x16fc
43#define STAT 0x2004
44#define L(v) (((v)<<16)|((v) & 0x0000ffff))
45#define H(v) (((v)>>16)|((v) & 0xffff0000))
46
47static inline int
48NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr, int len)
49{
50 unsigned long *laddr;
51 void __iomem *dma = priv(host)->dma + 0x2000;
52
53 if(!len) return 0;
54
55 writeb(0x02, priv(host)->base + CTRL);
56 laddr = (unsigned long *)addr;
57 while(len >= 32)
58 {
59 unsigned int status;
60 unsigned long v;
61 status = readb(priv(host)->base + STAT);
62 if(status & 0x80)
63 goto end;
64 if(!(status & 0x40))
65 continue;
66 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
67 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
68 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
69 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
70 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
71 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
72 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
73 v=*laddr++; writew(L(v), dma); writew(H(v), dma);
74 len -= 32;
75 if(len == 0)
76 break;
77 }
78
79 addr = (unsigned char *)laddr;
80 writeb(0x12, priv(host)->base + CTRL);
81
82 while(len > 0)
83 {
84 unsigned int status;
85 status = readb(priv(host)->base + STAT);
86 if(status & 0x80)
87 goto end;
88 if(status & 0x40)
89 {
90 writeb(*addr++, dma);
91 if(--len == 0)
92 break;
93 }
94
95 status = readb(priv(host)->base + STAT);
96 if(status & 0x80)
97 goto end;
98 if(status & 0x40)
99 {
100 writeb(*addr++, dma);
101 if(--len == 0)
102 break;
103 }
104 }
105end:
106 writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
107 return len;
108}
109
110static inline int
111NCR5380_pread(struct Scsi_Host *host, unsigned char *addr, int len)
112{
113 unsigned long *laddr;
114 void __iomem *dma = priv(host)->dma + 0x2000;
115
116 if(!len) return 0;
117
118 writeb(0x00, priv(host)->base + CTRL);
119 laddr = (unsigned long *)addr;
120 while(len >= 32)
121 {
122 unsigned int status;
123 status = readb(priv(host)->base + STAT);
124 if(status & 0x80)
125 goto end;
126 if(!(status & 0x40))
127 continue;
128 *laddr++ = readw(dma) | (readw(dma) << 16);
129 *laddr++ = readw(dma) | (readw(dma) << 16);
130 *laddr++ = readw(dma) | (readw(dma) << 16);
131 *laddr++ = readw(dma) | (readw(dma) << 16);
132 *laddr++ = readw(dma) | (readw(dma) << 16);
133 *laddr++ = readw(dma) | (readw(dma) << 16);
134 *laddr++ = readw(dma) | (readw(dma) << 16);
135 *laddr++ = readw(dma) | (readw(dma) << 16);
136 len -= 32;
137 if(len == 0)
138 break;
139 }
140
141 addr = (unsigned char *)laddr;
142 writeb(0x10, priv(host)->base + CTRL);
143
144 while(len > 0)
145 {
146 unsigned int status;
147 status = readb(priv(host)->base + STAT);
148 if(status & 0x80)
149 goto end;
150 if(status & 0x40)
151 {
152 *addr++ = readb(dma);
153 if(--len == 0)
154 break;
155 }
156
157 status = readb(priv(host)->base + STAT);
158 if(status & 0x80)
159 goto end;
160 if(status & 0x40)
161 {
162 *addr++ = readb(dma);
163 if(--len == 0)
164 break;
165 }
166 }
167end:
168 writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
169 return len;
170}
171
172static unsigned char cumanascsi_read(struct Scsi_Host *host, unsigned int reg)
173{
174 void __iomem *base = priv(host)->base;
175 unsigned char val;
176
177 writeb(0, base + CTRL);
178
179 val = readb(base + 0x2100 + (reg << 2));
180
181 priv(host)->ctrl = 0x40;
182 writeb(0x40, base + CTRL);
183
184 return val;
185}
186
187static void cumanascsi_write(struct Scsi_Host *host, unsigned int reg, unsigned int value)
188{
189 void __iomem *base = priv(host)->base;
190
191 writeb(0, base + CTRL);
192
193 writeb(value, base + 0x2100 + (reg << 2));
194
195 priv(host)->ctrl = 0x40;
196 writeb(0x40, base + CTRL);
197}
198
199#include "../NCR5380.c"
200
201static struct scsi_host_template cumanascsi_template = {
202 .module = THIS_MODULE,
203 .name = "Cumana 16-bit SCSI",
204 .info = cumanascsi_info,
205 .queuecommand = cumanascsi_queue_command,
206 .eh_abort_handler = NCR5380_abort,
207 .eh_bus_reset_handler = NCR5380_bus_reset,
208 .can_queue = 16,
209 .this_id = 7,
210 .sg_tablesize = SG_ALL,
211 .cmd_per_lun = 2,
212 .use_clustering = DISABLE_CLUSTERING,
213 .proc_name = "CumanaSCSI-1",
214};
215
216static int cumanascsi1_probe(struct expansion_card *ec,
217 const struct ecard_id *id)
218{
219 struct Scsi_Host *host;
220 int ret;
221
222 ret = ecard_request_resources(ec);
223 if (ret)
224 goto out;
225
226 host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
227 if (!host) {
228 ret = -ENOMEM;
229 goto out_release;
230 }
231
232 priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
233 ecard_resource_len(ec, ECARD_RES_IOCSLOW));
234 priv(host)->dma = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
235 ecard_resource_len(ec, ECARD_RES_MEMC));
236 if (!priv(host)->base || !priv(host)->dma) {
237 ret = -ENOMEM;
238 goto out_unmap;
239 }
240
241 host->irq = ec->irq;
242
243 NCR5380_init(host, 0);
244
245 priv(host)->ctrl = 0;
246 writeb(0, priv(host)->base + CTRL);
247
248 host->n_io_port = 255;
249 if (!(request_region(host->io_port, host->n_io_port, "CumanaSCSI-1"))) {
250 ret = -EBUSY;
251 goto out_unmap;
252 }
253
254 ret = request_irq(host->irq, cumanascsi_intr, 0,
255 "CumanaSCSI-1", host);
256 if (ret) {
257 printk("scsi%d: IRQ%d not free: %d\n",
258 host->host_no, host->irq, ret);
259 goto out_unmap;
260 }
261
262 ret = scsi_add_host(host, &ec->dev);
263 if (ret)
264 goto out_free_irq;
265
266 scsi_scan_host(host);
267 goto out;
268
269 out_free_irq:
270 free_irq(host->irq, host);
271 out_unmap:
272 iounmap(priv(host)->base);
273 iounmap(priv(host)->dma);
274 scsi_host_put(host);
275 out_release:
276 ecard_release_resources(ec);
277 out:
278 return ret;
279}
280
281static void cumanascsi1_remove(struct expansion_card *ec)
282{
283 struct Scsi_Host *host = ecard_get_drvdata(ec);
284
285 ecard_set_drvdata(ec, NULL);
286
287 scsi_remove_host(host);
288 free_irq(host->irq, host);
289 NCR5380_exit(host);
290 iounmap(priv(host)->base);
291 iounmap(priv(host)->dma);
292 scsi_host_put(host);
293 ecard_release_resources(ec);
294}
295
296static const struct ecard_id cumanascsi1_cids[] = {
297 { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
298 { 0xffff, 0xffff }
299};
300
301static struct ecard_driver cumanascsi1_driver = {
302 .probe = cumanascsi1_probe,
303 .remove = cumanascsi1_remove,
304 .id_table = cumanascsi1_cids,
305 .drv = {
306 .name = "cumanascsi1",
307 },
308};
309
310static int __init cumanascsi_init(void)
311{
312 return ecard_register_driver(&cumanascsi1_driver);
313}
314
315static void __exit cumanascsi_exit(void)
316{
317 ecard_remove_driver(&cumanascsi1_driver);
318}
319
320module_init(cumanascsi_init);
321module_exit(cumanascsi_exit);
322
323MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
324MODULE_LICENSE("GPL");
325
