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25#include <linux/module.h>
26#include <linux/blkdev.h>
27#include <linux/kernel.h>
28#include <linux/string.h>
29#include <linux/ioport.h>
30#include <linux/proc_fs.h>
31#include <linux/delay.h>
32#include <linux/interrupt.h>
33#include <linux/init.h>
34#include <linux/dma-mapping.h>
35
36#include <asm/io.h>
37#include <asm/dma.h>
38#include <asm/ecard.h>
39#include <asm/pgtable.h>
40
41#include "../scsi.h"
42#include <scsi/scsi_host.h>
43#include "fas216.h"
44#include "scsi.h"
45
46#include <scsi/scsicam.h>
47
48#define EESOX_FAS216_OFFSET 0x3000
49#define EESOX_FAS216_SHIFT 5
50
51#define EESOX_DMASTAT 0x2800
52#define EESOX_STAT_INTR 0x01
53#define EESOX_STAT_DMA 0x02
54
55#define EESOX_CONTROL 0x2800
56#define EESOX_INTR_ENABLE 0x04
57#define EESOX_TERM_ENABLE 0x02
58#define EESOX_RESET 0x01
59
60#define EESOX_DMADATA 0x3800
61
62#define VERSION "1.10 (17/01/2003 2.5.59)"
63
64
65
66
67static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
68
69#define NR_SG 256
70
71struct eesoxscsi_info {
72 FAS216_Info info;
73 struct expansion_card *ec;
74 void __iomem *base;
75 void __iomem *ctl_port;
76 unsigned int control;
77 struct scatterlist sg[NR_SG];
78};
79
80
81
82
83
84
85static void
86eesoxscsi_irqenable(struct expansion_card *ec, int irqnr)
87{
88 struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data;
89
90 info->control |= EESOX_INTR_ENABLE;
91
92 writeb(info->control, info->ctl_port);
93}
94
95
96
97
98
99
100static void
101eesoxscsi_irqdisable(struct expansion_card *ec, int irqnr)
102{
103 struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data;
104
105 info->control &= ~EESOX_INTR_ENABLE;
106
107 writeb(info->control, info->ctl_port);
108}
109
110static const expansioncard_ops_t eesoxscsi_ops = {
111 .irqenable = eesoxscsi_irqenable,
112 .irqdisable = eesoxscsi_irqdisable,
113};
114
115
116
117
118
119
120static void
121eesoxscsi_terminator_ctl(struct Scsi_Host *host, int on_off)
122{
123 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
124 unsigned long flags;
125
126 spin_lock_irqsave(host->host_lock, flags);
127 if (on_off)
128 info->control |= EESOX_TERM_ENABLE;
129 else
130 info->control &= ~EESOX_TERM_ENABLE;
131
132 writeb(info->control, info->ctl_port);
133 spin_unlock_irqrestore(host->host_lock, flags);
134}
135
136
137
138
139
140
141static irqreturn_t
142eesoxscsi_intr(int irq, void *dev_id)
143{
144 struct eesoxscsi_info *info = dev_id;
145
146 return fas216_intr(&info->info);
147}
148
149
150
151
152
153
154
155
156
157static fasdmatype_t
158eesoxscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
159 fasdmadir_t direction, fasdmatype_t min_type)
160{
161 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
162 struct device *dev = scsi_get_device(host);
163 int dmach = info->info.scsi.dma;
164
165 if (dmach != NO_DMA &&
166 (min_type == fasdma_real_all || SCp->this_residual >= 512)) {
167 int bufs, map_dir, dma_dir;
168
169 bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
170
171 if (direction == DMA_OUT)
172 map_dir = DMA_TO_DEVICE,
173 dma_dir = DMA_MODE_WRITE;
174 else
175 map_dir = DMA_FROM_DEVICE,
176 dma_dir = DMA_MODE_READ;
177
178 dma_map_sg(dev, info->sg, bufs, map_dir);
179
180 disable_dma(dmach);
181 set_dma_sg(dmach, info->sg, bufs);
182 set_dma_mode(dmach, dma_dir);
183 enable_dma(dmach);
184 return fasdma_real_all;
185 }
186
187
188
189
190
191 return fasdma_pseudo;
192}
193
194static void eesoxscsi_buffer_in(void *buf, int length, void __iomem *base)
195{
196 const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET;
197 const void __iomem *reg_dmastat = base + EESOX_DMASTAT;
198 const void __iomem *reg_dmadata = base + EESOX_DMADATA;
199 register const unsigned long mask = 0xffff;
200
201 do {
202 unsigned int status;
203
204
205
206
207 status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT));
208 if (status & STAT_INT)
209 break;
210
211
212
213
214 status = readb(reg_dmastat);
215 if (!(status & EESOX_STAT_DMA))
216 continue;
217
218
219
220
221 status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF;
222 if (status > 16)
223 status = 16;
224 if (status > length)
225 status = length;
226
227
228
229
230 if (((u32)buf) & 2 && status >= 2) {
231 *(u16 *)buf = readl(reg_dmadata);
232 buf += 2;
233 status -= 2;
234 length -= 2;
235 }
236
237 if (status >= 8) {
238 unsigned long l1, l2;
239
240 l1 = readl(reg_dmadata) & mask;
241 l1 |= readl(reg_dmadata) << 16;
242 l2 = readl(reg_dmadata) & mask;
243 l2 |= readl(reg_dmadata) << 16;
244 *(u32 *)buf = l1;
245 buf += 4;
246 *(u32 *)buf = l2;
247 buf += 4;
248 length -= 8;
249 continue;
250 }
251
252 if (status >= 4) {
253 unsigned long l1;
254
255 l1 = readl(reg_dmadata) & mask;
256 l1 |= readl(reg_dmadata) << 16;
257
258 *(u32 *)buf = l1;
259 buf += 4;
260 length -= 4;
261 continue;
262 }
263
264 if (status >= 2) {
265 *(u16 *)buf = readl(reg_dmadata);
266 buf += 2;
267 length -= 2;
268 }
269 } while (length);
270}
271
272static void eesoxscsi_buffer_out(void *buf, int length, void __iomem *base)
273{
274 const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET;
275 const void __iomem *reg_dmastat = base + EESOX_DMASTAT;
276 void __iomem *reg_dmadata = base + EESOX_DMADATA;
277
278 do {
279 unsigned int status;
280
281
282
283
284 status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT));
285 if (status & STAT_INT)
286 break;
287
288
289
290
291 status = readb(reg_dmastat);
292 if (!(status & EESOX_STAT_DMA))
293 continue;
294
295
296
297
298 status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF;
299 if (status > 16)
300 status = 16;
301 status = 16 - status;
302 if (status > length)
303 status = length;
304 status &= ~1;
305
306
307
308
309 if (((u32)buf) & 2 && status >= 2) {
310 writel(*(u16 *)buf << 16, reg_dmadata);
311 buf += 2;
312 status -= 2;
313 length -= 2;
314 }
315
316 if (status >= 8) {
317 unsigned long l1, l2;
318
319 l1 = *(u32 *)buf;
320 buf += 4;
321 l2 = *(u32 *)buf;
322 buf += 4;
323
324 writel(l1 << 16, reg_dmadata);
325 writel(l1, reg_dmadata);
326 writel(l2 << 16, reg_dmadata);
327 writel(l2, reg_dmadata);
328 length -= 8;
329 continue;
330 }
331
332 if (status >= 4) {
333 unsigned long l1;
334
335 l1 = *(u32 *)buf;
336 buf += 4;
337
338 writel(l1 << 16, reg_dmadata);
339 writel(l1, reg_dmadata);
340 length -= 4;
341 continue;
342 }
343
344 if (status >= 2) {
345 writel(*(u16 *)buf << 16, reg_dmadata);
346 buf += 2;
347 length -= 2;
348 }
349 } while (length);
350}
351
352static void
353eesoxscsi_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
354 fasdmadir_t dir, int transfer_size)
355{
356 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
357 if (dir == DMA_IN) {
358 eesoxscsi_buffer_in(SCp->ptr, SCp->this_residual, info->base);
359 } else {
360 eesoxscsi_buffer_out(SCp->ptr, SCp->this_residual, info->base);
361 }
362}
363
364
365
366
367
368
369static void
370eesoxscsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
371{
372 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
373 if (info->info.scsi.dma != NO_DMA)
374 disable_dma(info->info.scsi.dma);
375}
376
377
378
379
380
381
382const char *eesoxscsi_info(struct Scsi_Host *host)
383{
384 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
385 static char string[150];
386
387 sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
388 host->hostt->name, info->info.scsi.type, info->ec->slot_no,
389 VERSION, info->control & EESOX_TERM_ENABLE ? "n" : "ff");
390
391 return string;
392}
393
394
395
396
397
398
399
400
401static int
402eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
403{
404 int ret = length;
405
406 if (length >= 9 && strncmp(buffer, "EESOXSCSI", 9) == 0) {
407 buffer += 9;
408 length -= 9;
409
410 if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
411 if (buffer[5] == '1')
412 eesoxscsi_terminator_ctl(host, 1);
413 else if (buffer[5] == '0')
414 eesoxscsi_terminator_ctl(host, 0);
415 else
416 ret = -EINVAL;
417 } else
418 ret = -EINVAL;
419 } else
420 ret = -EINVAL;
421
422 return ret;
423}
424
425static int eesoxscsi_show_info(struct seq_file *m, struct Scsi_Host *host)
426{
427 struct eesoxscsi_info *info;
428
429 info = (struct eesoxscsi_info *)host->hostdata;
430
431 seq_printf(m, "EESOX SCSI driver v%s\n", VERSION);
432 fas216_print_host(&info->info, m);
433 seq_printf(m, "Term : o%s\n",
434 info->control & EESOX_TERM_ENABLE ? "n" : "ff");
435
436 fas216_print_stats(&info->info, m);
437 fas216_print_devices(&info->info, m);
438 return 0;
439}
440
441static ssize_t eesoxscsi_show_term(struct device *dev, struct device_attribute *attr, char *buf)
442{
443 struct expansion_card *ec = ECARD_DEV(dev);
444 struct Scsi_Host *host = ecard_get_drvdata(ec);
445 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
446
447 return sprintf(buf, "%d\n", info->control & EESOX_TERM_ENABLE ? 1 : 0);
448}
449
450static ssize_t eesoxscsi_store_term(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
451{
452 struct expansion_card *ec = ECARD_DEV(dev);
453 struct Scsi_Host *host = ecard_get_drvdata(ec);
454 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
455 unsigned long flags;
456
457 if (len > 1) {
458 spin_lock_irqsave(host->host_lock, flags);
459 if (buf[0] != '0') {
460 info->control |= EESOX_TERM_ENABLE;
461 } else {
462 info->control &= ~EESOX_TERM_ENABLE;
463 }
464 writeb(info->control, info->ctl_port);
465 spin_unlock_irqrestore(host->host_lock, flags);
466 }
467
468 return len;
469}
470
471static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR,
472 eesoxscsi_show_term, eesoxscsi_store_term);
473
474static struct scsi_host_template eesox_template = {
475 .module = THIS_MODULE,
476 .show_info = eesoxscsi_show_info,
477 .write_info = eesoxscsi_set_proc_info,
478 .name = "EESOX SCSI",
479 .info = eesoxscsi_info,
480 .queuecommand = fas216_queue_command,
481 .eh_host_reset_handler = fas216_eh_host_reset,
482 .eh_bus_reset_handler = fas216_eh_bus_reset,
483 .eh_device_reset_handler = fas216_eh_device_reset,
484 .eh_abort_handler = fas216_eh_abort,
485 .can_queue = 1,
486 .this_id = 7,
487 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
488 .dma_boundary = IOMD_DMA_BOUNDARY,
489 .use_clustering = DISABLE_CLUSTERING,
490 .proc_name = "eesox",
491};
492
493static int eesoxscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
494{
495 struct Scsi_Host *host;
496 struct eesoxscsi_info *info;
497 void __iomem *base;
498 int ret;
499
500 ret = ecard_request_resources(ec);
501 if (ret)
502 goto out;
503
504 base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
505 if (!base) {
506 ret = -ENOMEM;
507 goto out_region;
508 }
509
510 host = scsi_host_alloc(&eesox_template,
511 sizeof(struct eesoxscsi_info));
512 if (!host) {
513 ret = -ENOMEM;
514 goto out_region;
515 }
516
517 ecard_set_drvdata(ec, host);
518
519 info = (struct eesoxscsi_info *)host->hostdata;
520 info->ec = ec;
521 info->base = base;
522 info->ctl_port = base + EESOX_CONTROL;
523 info->control = term[ec->slot_no] ? EESOX_TERM_ENABLE : 0;
524 writeb(info->control, info->ctl_port);
525
526 info->info.scsi.io_base = base + EESOX_FAS216_OFFSET;
527 info->info.scsi.io_shift = EESOX_FAS216_SHIFT;
528 info->info.scsi.irq = ec->irq;
529 info->info.scsi.dma = ec->dma;
530 info->info.ifcfg.clockrate = 40;
531 info->info.ifcfg.select_timeout = 255;
532 info->info.ifcfg.asyncperiod = 200;
533 info->info.ifcfg.sync_max_depth = 7;
534 info->info.ifcfg.cntl3 = CNTL3_FASTSCSI | CNTL3_FASTCLK;
535 info->info.ifcfg.disconnect_ok = 1;
536 info->info.ifcfg.wide_max_size = 0;
537 info->info.ifcfg.capabilities = FASCAP_PSEUDODMA;
538 info->info.dma.setup = eesoxscsi_dma_setup;
539 info->info.dma.pseudo = eesoxscsi_dma_pseudo;
540 info->info.dma.stop = eesoxscsi_dma_stop;
541
542 ec->irqaddr = base + EESOX_DMASTAT;
543 ec->irqmask = EESOX_STAT_INTR;
544
545 ecard_setirq(ec, &eesoxscsi_ops, info);
546
547 device_create_file(&ec->dev, &dev_attr_bus_term);
548
549 ret = fas216_init(host);
550 if (ret)
551 goto out_free;
552
553 ret = request_irq(ec->irq, eesoxscsi_intr, 0, "eesoxscsi", info);
554 if (ret) {
555 printk("scsi%d: IRQ%d not free: %d\n",
556 host->host_no, ec->irq, ret);
557 goto out_remove;
558 }
559
560 if (info->info.scsi.dma != NO_DMA) {
561 if (request_dma(info->info.scsi.dma, "eesox")) {
562 printk("scsi%d: DMA%d not free, DMA disabled\n",
563 host->host_no, info->info.scsi.dma);
564 info->info.scsi.dma = NO_DMA;
565 } else {
566 set_dma_speed(info->info.scsi.dma, 180);
567 info->info.ifcfg.capabilities |= FASCAP_DMA;
568 info->info.ifcfg.cntl3 |= CNTL3_BS8;
569 }
570 }
571
572 ret = fas216_add(host, &ec->dev);
573 if (ret == 0)
574 goto out;
575
576 if (info->info.scsi.dma != NO_DMA)
577 free_dma(info->info.scsi.dma);
578 free_irq(ec->irq, host);
579
580 out_remove:
581 fas216_remove(host);
582
583 out_free:
584 device_remove_file(&ec->dev, &dev_attr_bus_term);
585 scsi_host_put(host);
586
587 out_region:
588 ecard_release_resources(ec);
589
590 out:
591 return ret;
592}
593
594static void eesoxscsi_remove(struct expansion_card *ec)
595{
596 struct Scsi_Host *host = ecard_get_drvdata(ec);
597 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
598
599 ecard_set_drvdata(ec, NULL);
600 fas216_remove(host);
601
602 if (info->info.scsi.dma != NO_DMA)
603 free_dma(info->info.scsi.dma);
604 free_irq(ec->irq, info);
605
606 device_remove_file(&ec->dev, &dev_attr_bus_term);
607
608 fas216_release(host);
609 scsi_host_put(host);
610 ecard_release_resources(ec);
611}
612
613static const struct ecard_id eesoxscsi_cids[] = {
614 { MANU_EESOX, PROD_EESOX_SCSI2 },
615 { 0xffff, 0xffff },
616};
617
618static struct ecard_driver eesoxscsi_driver = {
619 .probe = eesoxscsi_probe,
620 .remove = eesoxscsi_remove,
621 .id_table = eesoxscsi_cids,
622 .drv = {
623 .name = "eesoxscsi",
624 },
625};
626
627static int __init eesox_init(void)
628{
629 return ecard_register_driver(&eesoxscsi_driver);
630}
631
632static void __exit eesox_exit(void)
633{
634 ecard_remove_driver(&eesoxscsi_driver);
635}
636
637module_init(eesox_init);
638module_exit(eesox_exit);
639
640MODULE_AUTHOR("Russell King");
641MODULE_DESCRIPTION("EESOX 'Fast' SCSI driver for Acorn machines");
642module_param_array(term, int, NULL, 0);
643MODULE_PARM_DESC(term, "SCSI bus termination");
644MODULE_LICENSE("GPL");
645
