1/*
2 * Generic Generic NCR5380 driver
3 *
4 * Copyright 1995-2002, Russell King
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