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16#include <linux/module.h>
17#include <linux/blkdev.h>
18#include <linux/kernel.h>
19#include <linux/string.h>
20#include <linux/ioport.h>
21#include <linux/proc_fs.h>
22#include <linux/delay.h>
23#include <linux/interrupt.h>
24#include <linux/init.h>
25#include <linux/dma-mapping.h>
26#include <linux/pgtable.h>
27
28#include <asm/dma.h>
29#include <asm/ecard.h>
30#include <asm/io.h>
31
32#include "../scsi.h"
33#include <scsi/scsi_host.h>
34#include "fas216.h"
35#include "scsi.h"
36
37#include <scsi/scsicam.h>
38
39#define CUMANASCSI2_STATUS (0x0000)
40#define STATUS_INT (1 << 0)
41#define STATUS_DRQ (1 << 1)
42#define STATUS_LATCHED (1 << 3)
43
44#define CUMANASCSI2_ALATCH (0x0014)
45#define ALATCH_ENA_INT (3)
46#define ALATCH_DIS_INT (2)
47#define ALATCH_ENA_TERM (5)
48#define ALATCH_DIS_TERM (4)
49#define ALATCH_ENA_BIT32 (11)
50#define ALATCH_DIS_BIT32 (10)
51#define ALATCH_ENA_DMA (13)
52#define ALATCH_DIS_DMA (12)
53#define ALATCH_DMA_OUT (15)
54#define ALATCH_DMA_IN (14)
55
56#define CUMANASCSI2_PSEUDODMA (0x0200)
57
58#define CUMANASCSI2_FAS216_OFFSET (0x0300)
59#define CUMANASCSI2_FAS216_SHIFT 2
60
61
62
63
64#define VERSION "1.00 (13/11/2002 2.5.47)"
65
66
67
68
69static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
70
71#define NR_SG 256
72
73struct cumanascsi2_info {
74 FAS216_Info info;
75 struct expansion_card *ec;
76 void __iomem *base;
77 unsigned int terms;
78 struct scatterlist sg[NR_SG];
79};
80
81#define CSTATUS_IRQ (1 << 0)
82#define CSTATUS_DRQ (1 << 1)
83
84
85
86
87
88
89static void
90cumanascsi_2_irqenable(struct expansion_card *ec, int irqnr)
91{
92 struct cumanascsi2_info *info = ec->irq_data;
93 writeb(ALATCH_ENA_INT, info->base + CUMANASCSI2_ALATCH);
94}
95
96
97
98
99
100
101static void
102cumanascsi_2_irqdisable(struct expansion_card *ec, int irqnr)
103{
104 struct cumanascsi2_info *info = ec->irq_data;
105 writeb(ALATCH_DIS_INT, info->base + CUMANASCSI2_ALATCH);
106}
107
108static const expansioncard_ops_t cumanascsi_2_ops = {
109 .irqenable = cumanascsi_2_irqenable,
110 .irqdisable = cumanascsi_2_irqdisable,
111};
112
113
114
115
116
117
118static void
119cumanascsi_2_terminator_ctl(struct Scsi_Host *host, int on_off)
120{
121 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
122
123 if (on_off) {
124 info->terms = 1;
125 writeb(ALATCH_ENA_TERM, info->base + CUMANASCSI2_ALATCH);
126 } else {
127 info->terms = 0;
128 writeb(ALATCH_DIS_TERM, info->base + CUMANASCSI2_ALATCH);
129 }
130}
131
132
133
134
135
136
137static irqreturn_t
138cumanascsi_2_intr(int irq, void *dev_id)
139{
140 struct cumanascsi2_info *info = dev_id;
141
142 return fas216_intr(&info->info);
143}
144
145
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147
148
149
150
151
152
153static fasdmatype_t
154cumanascsi_2_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
155 fasdmadir_t direction, fasdmatype_t min_type)
156{
157 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
158 struct device *dev = scsi_get_device(host);
159 int dmach = info->info.scsi.dma;
160
161 writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
162
163 if (dmach != NO_DMA &&
164 (min_type == fasdma_real_all || SCp->this_residual >= 512)) {
165 int bufs, map_dir, dma_dir, alatch_dir;
166
167 bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
168
169 if (direction == DMA_OUT) {
170 map_dir = DMA_TO_DEVICE;
171 dma_dir = DMA_MODE_WRITE;
172 alatch_dir = ALATCH_DMA_OUT;
173 } else {
174 map_dir = DMA_FROM_DEVICE;
175 dma_dir = DMA_MODE_READ;
176 alatch_dir = ALATCH_DMA_IN;
177 }
178
179 dma_map_sg(dev, info->sg, bufs, map_dir);
180
181 disable_dma(dmach);
182 set_dma_sg(dmach, info->sg, bufs);
183 writeb(alatch_dir, info->base + CUMANASCSI2_ALATCH);
184 set_dma_mode(dmach, dma_dir);
185 enable_dma(dmach);
186 writeb(ALATCH_ENA_DMA, info->base + CUMANASCSI2_ALATCH);
187 writeb(ALATCH_DIS_BIT32, info->base + CUMANASCSI2_ALATCH);
188 return fasdma_real_all;
189 }
190
191
192
193
194
195 return fasdma_pio;
196}
197
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199
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201
202
203
204
205
206static void
207cumanascsi_2_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
208 fasdmadir_t direction, int transfer)
209{
210 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
211 unsigned int length;
212 unsigned char *addr;
213
214 length = SCp->this_residual;
215 addr = SCp->ptr;
216
217 if (direction == DMA_OUT)
218#if 0
219 while (length > 1) {
220 unsigned long word;
221 unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
222
223 if (status & STATUS_INT)
224 goto end;
225
226 if (!(status & STATUS_DRQ))
227 continue;
228
229 word = *addr | *(addr + 1) << 8;
230 writew(word, info->base + CUMANASCSI2_PSEUDODMA);
231 addr += 2;
232 length -= 2;
233 }
234#else
235 printk ("PSEUDO_OUT???\n");
236#endif
237 else {
238 if (transfer && (transfer & 255)) {
239 while (length >= 256) {
240 unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
241
242 if (status & STATUS_INT)
243 return;
244
245 if (!(status & STATUS_DRQ))
246 continue;
247
248 readsw(info->base + CUMANASCSI2_PSEUDODMA,
249 addr, 256 >> 1);
250 addr += 256;
251 length -= 256;
252 }
253 }
254
255 while (length > 0) {
256 unsigned long word;
257 unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
258
259 if (status & STATUS_INT)
260 return;
261
262 if (!(status & STATUS_DRQ))
263 continue;
264
265 word = readw(info->base + CUMANASCSI2_PSEUDODMA);
266 *addr++ = word;
267 if (--length > 0) {
268 *addr++ = word >> 8;
269 length --;
270 }
271 }
272 }
273}
274
275
276
277
278
279
280static void
281cumanascsi_2_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
282{
283 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
284 if (info->info.scsi.dma != NO_DMA) {
285 writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
286 disable_dma(info->info.scsi.dma);
287 }
288}
289
290
291
292
293
294
295const char *cumanascsi_2_info(struct Scsi_Host *host)
296{
297 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
298 static char string[150];
299
300 sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
301 host->hostt->name, info->info.scsi.type, info->ec->slot_no,
302 VERSION, info->terms ? "n" : "ff");
303
304 return string;
305}
306
307
308
309
310
311
312
313
314static int
315cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
316{
317 int ret = length;
318
319 if (length >= 11 && strncmp(buffer, "CUMANASCSI2", 11) == 0) {
320 buffer += 11;
321 length -= 11;
322
323 if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
324 if (buffer[5] == '1')
325 cumanascsi_2_terminator_ctl(host, 1);
326 else if (buffer[5] == '0')
327 cumanascsi_2_terminator_ctl(host, 0);
328 else
329 ret = -EINVAL;
330 } else {
331 ret = -EINVAL;
332 }
333 } else {
334 ret = -EINVAL;
335 }
336
337 return ret;
338}
339
340static int cumanascsi_2_show_info(struct seq_file *m, struct Scsi_Host *host)
341{
342 struct cumanascsi2_info *info;
343 info = (struct cumanascsi2_info *)host->hostdata;
344
345 seq_printf(m, "Cumana SCSI II driver v%s\n", VERSION);
346 fas216_print_host(&info->info, m);
347 seq_printf(m, "Term : o%s\n",
348 info->terms ? "n" : "ff");
349
350 fas216_print_stats(&info->info, m);
351 fas216_print_devices(&info->info, m);
352 return 0;
353}
354
355static struct scsi_host_template cumanascsi2_template = {
356 .module = THIS_MODULE,
357 .show_info = cumanascsi_2_show_info,
358 .write_info = cumanascsi_2_set_proc_info,
359 .name = "Cumana SCSI II",
360 .info = cumanascsi_2_info,
361 .queuecommand = fas216_queue_command,
362 .eh_host_reset_handler = fas216_eh_host_reset,
363 .eh_bus_reset_handler = fas216_eh_bus_reset,
364 .eh_device_reset_handler = fas216_eh_device_reset,
365 .eh_abort_handler = fas216_eh_abort,
366 .can_queue = 1,
367 .this_id = 7,
368 .sg_tablesize = SG_MAX_SEGMENTS,
369 .dma_boundary = IOMD_DMA_BOUNDARY,
370 .proc_name = "cumanascsi2",
371};
372
373static int cumanascsi2_probe(struct expansion_card *ec,
374 const struct ecard_id *id)
375{
376 struct Scsi_Host *host;
377 struct cumanascsi2_info *info;
378 void __iomem *base;
379 int ret;
380
381 ret = ecard_request_resources(ec);
382 if (ret)
383 goto out;
384
385 base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
386 if (!base) {
387 ret = -ENOMEM;
388 goto out_region;
389 }
390
391 host = scsi_host_alloc(&cumanascsi2_template,
392 sizeof(struct cumanascsi2_info));
393 if (!host) {
394 ret = -ENOMEM;
395 goto out_region;
396 }
397
398 ecard_set_drvdata(ec, host);
399
400 info = (struct cumanascsi2_info *)host->hostdata;
401 info->ec = ec;
402 info->base = base;
403
404 cumanascsi_2_terminator_ctl(host, term[ec->slot_no]);
405
406 info->info.scsi.io_base = base + CUMANASCSI2_FAS216_OFFSET;
407 info->info.scsi.io_shift = CUMANASCSI2_FAS216_SHIFT;
408 info->info.scsi.irq = ec->irq;
409 info->info.scsi.dma = ec->dma;
410 info->info.ifcfg.clockrate = 40;
411 info->info.ifcfg.select_timeout = 255;
412 info->info.ifcfg.asyncperiod = 200;
413 info->info.ifcfg.sync_max_depth = 7;
414 info->info.ifcfg.cntl3 = CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK;
415 info->info.ifcfg.disconnect_ok = 1;
416 info->info.ifcfg.wide_max_size = 0;
417 info->info.ifcfg.capabilities = FASCAP_PSEUDODMA;
418 info->info.dma.setup = cumanascsi_2_dma_setup;
419 info->info.dma.pseudo = cumanascsi_2_dma_pseudo;
420 info->info.dma.stop = cumanascsi_2_dma_stop;
421
422 ec->irqaddr = info->base + CUMANASCSI2_STATUS;
423 ec->irqmask = STATUS_INT;
424
425 ecard_setirq(ec, &cumanascsi_2_ops, info);
426
427 ret = fas216_init(host);
428 if (ret)
429 goto out_free;
430
431 ret = request_irq(ec->irq, cumanascsi_2_intr,
432 0, "cumanascsi2", info);
433 if (ret) {
434 printk("scsi%d: IRQ%d not free: %d\n",
435 host->host_no, ec->irq, ret);
436 goto out_release;
437 }
438
439 if (info->info.scsi.dma != NO_DMA) {
440 if (request_dma(info->info.scsi.dma, "cumanascsi2")) {
441 printk("scsi%d: DMA%d not free, using PIO\n",
442 host->host_no, info->info.scsi.dma);
443 info->info.scsi.dma = NO_DMA;
444 } else {
445 set_dma_speed(info->info.scsi.dma, 180);
446 info->info.ifcfg.capabilities |= FASCAP_DMA;
447 }
448 }
449
450 ret = fas216_add(host, &ec->dev);
451 if (ret == 0)
452 goto out;
453
454 if (info->info.scsi.dma != NO_DMA)
455 free_dma(info->info.scsi.dma);
456 free_irq(ec->irq, info);
457
458 out_release:
459 fas216_release(host);
460
461 out_free:
462 scsi_host_put(host);
463
464 out_region:
465 ecard_release_resources(ec);
466
467 out:
468 return ret;
469}
470
471static void cumanascsi2_remove(struct expansion_card *ec)
472{
473 struct Scsi_Host *host = ecard_get_drvdata(ec);
474 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
475
476 ecard_set_drvdata(ec, NULL);
477 fas216_remove(host);
478
479 if (info->info.scsi.dma != NO_DMA)
480 free_dma(info->info.scsi.dma);
481 free_irq(ec->irq, info);
482
483 fas216_release(host);
484 scsi_host_put(host);
485 ecard_release_resources(ec);
486}
487
488static const struct ecard_id cumanascsi2_cids[] = {
489 { MANU_CUMANA, PROD_CUMANA_SCSI_2 },
490 { 0xffff, 0xffff },
491};
492
493static struct ecard_driver cumanascsi2_driver = {
494 .probe = cumanascsi2_probe,
495 .remove = cumanascsi2_remove,
496 .id_table = cumanascsi2_cids,
497 .drv = {
498 .name = "cumanascsi2",
499 },
500};
501
502static int __init cumanascsi2_init(void)
503{
504 return ecard_register_driver(&cumanascsi2_driver);
505}
506
507static void __exit cumanascsi2_exit(void)
508{
509 ecard_remove_driver(&cumanascsi2_driver);
510}
511
512module_init(cumanascsi2_init);
513module_exit(cumanascsi2_exit);
514
515MODULE_AUTHOR("Russell King");
516MODULE_DESCRIPTION("Cumana SCSI-2 driver for Acorn machines");
517module_param_array(term, int, NULL, 0);
518MODULE_PARM_DESC(term, "SCSI bus termination");
519MODULE_LICENSE("GPL");
520
