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22#include <linux/module.h>
23#include <linux/blkdev.h>
24#include <linux/kernel.h>
25#include <linux/string.h>
26#include <linux/ioport.h>
27#include <linux/proc_fs.h>
28#include <linux/delay.h>
29#include <linux/interrupt.h>
30#include <linux/init.h>
31#include <linux/dma-mapping.h>
32#include <linux/pgtable.h>
33
34#include <asm/io.h>
35#include <asm/dma.h>
36#include <asm/ecard.h>
37
38#include "../scsi.h"
39#include <scsi/scsi_host.h>
40#include "fas216.h"
41#include "scsi.h"
42
43#include <scsi/scsicam.h>
44
45#define EESOX_FAS216_OFFSET 0x3000
46#define EESOX_FAS216_SHIFT 5
47
48#define EESOX_DMASTAT 0x2800
49#define EESOX_STAT_INTR 0x01
50#define EESOX_STAT_DMA 0x02
51
52#define EESOX_CONTROL 0x2800
53#define EESOX_INTR_ENABLE 0x04
54#define EESOX_TERM_ENABLE 0x02
55#define EESOX_RESET 0x01
56
57#define EESOX_DMADATA 0x3800
58
59#define VERSION "1.10 (17/01/2003 2.5.59)"
60
61
62
63
64static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
65
66#define NR_SG 256
67
68struct eesoxscsi_info {
69 FAS216_Info info;
70 struct expansion_card *ec;
71 void __iomem *base;
72 void __iomem *ctl_port;
73 unsigned int control;
74 struct scatterlist sg[NR_SG];
75};
76
77
78
79
80
81
82static void
83eesoxscsi_irqenable(struct expansion_card *ec, int irqnr)
84{
85 struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data;
86
87 info->control |= EESOX_INTR_ENABLE;
88
89 writeb(info->control, info->ctl_port);
90}
91
92
93
94
95
96
97static void
98eesoxscsi_irqdisable(struct expansion_card *ec, int irqnr)
99{
100 struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data;
101
102 info->control &= ~EESOX_INTR_ENABLE;
103
104 writeb(info->control, info->ctl_port);
105}
106
107static const expansioncard_ops_t eesoxscsi_ops = {
108 .irqenable = eesoxscsi_irqenable,
109 .irqdisable = eesoxscsi_irqdisable,
110};
111
112
113
114
115
116
117static void
118eesoxscsi_terminator_ctl(struct Scsi_Host *host, int on_off)
119{
120 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
121 unsigned long flags;
122
123 spin_lock_irqsave(host->host_lock, flags);
124 if (on_off)
125 info->control |= EESOX_TERM_ENABLE;
126 else
127 info->control &= ~EESOX_TERM_ENABLE;
128
129 writeb(info->control, info->ctl_port);
130 spin_unlock_irqrestore(host->host_lock, flags);
131}
132
133
134
135
136
137
138static irqreturn_t
139eesoxscsi_intr(int irq, void *dev_id)
140{
141 struct eesoxscsi_info *info = dev_id;
142
143 return fas216_intr(&info->info);
144}
145
146
147
148
149
150
151
152
153
154static fasdmatype_t
155eesoxscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
156 fasdmadir_t direction, fasdmatype_t min_type)
157{
158 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
159 struct device *dev = scsi_get_device(host);
160 int dmach = info->info.scsi.dma;
161
162 if (dmach != NO_DMA &&
163 (min_type == fasdma_real_all || SCp->this_residual >= 512)) {
164 int bufs, map_dir, dma_dir;
165
166 bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
167
168 if (direction == DMA_OUT) {
169 map_dir = DMA_TO_DEVICE;
170 dma_dir = DMA_MODE_WRITE;
171 } else {
172 map_dir = DMA_FROM_DEVICE;
173 dma_dir = DMA_MODE_READ;
174 }
175
176 dma_map_sg(dev, info->sg, bufs, map_dir);
177
178 disable_dma(dmach);
179 set_dma_sg(dmach, info->sg, bufs);
180 set_dma_mode(dmach, dma_dir);
181 enable_dma(dmach);
182 return fasdma_real_all;
183 }
184
185
186
187
188
189 return fasdma_pseudo;
190}
191
192static void eesoxscsi_buffer_in(void *buf, int length, void __iomem *base)
193{
194 const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET;
195 const void __iomem *reg_dmastat = base + EESOX_DMASTAT;
196 const void __iomem *reg_dmadata = base + EESOX_DMADATA;
197 register const unsigned long mask = 0xffff;
198
199 do {
200 unsigned int status;
201
202
203
204
205 status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT));
206 if (status & STAT_INT)
207 break;
208
209
210
211
212 status = readb(reg_dmastat);
213 if (!(status & EESOX_STAT_DMA))
214 continue;
215
216
217
218
219 status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF;
220 if (status > 16)
221 status = 16;
222 if (status > length)
223 status = length;
224
225
226
227
228 if (((u32)buf) & 2 && status >= 2) {
229 *(u16 *)buf = readl(reg_dmadata);
230 buf += 2;
231 status -= 2;
232 length -= 2;
233 }
234
235 if (status >= 8) {
236 unsigned long l1, l2;
237
238 l1 = readl(reg_dmadata) & mask;
239 l1 |= readl(reg_dmadata) << 16;
240 l2 = readl(reg_dmadata) & mask;
241 l2 |= readl(reg_dmadata) << 16;
242 *(u32 *)buf = l1;
243 buf += 4;
244 *(u32 *)buf = l2;
245 buf += 4;
246 length -= 8;
247 continue;
248 }
249
250 if (status >= 4) {
251 unsigned long l1;
252
253 l1 = readl(reg_dmadata) & mask;
254 l1 |= readl(reg_dmadata) << 16;
255
256 *(u32 *)buf = l1;
257 buf += 4;
258 length -= 4;
259 continue;
260 }
261
262 if (status >= 2) {
263 *(u16 *)buf = readl(reg_dmadata);
264 buf += 2;
265 length -= 2;
266 }
267 } while (length);
268}
269
270static void eesoxscsi_buffer_out(void *buf, int length, void __iomem *base)
271{
272 const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET;
273 const void __iomem *reg_dmastat = base + EESOX_DMASTAT;
274 void __iomem *reg_dmadata = base + EESOX_DMADATA;
275
276 do {
277 unsigned int status;
278
279
280
281
282 status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT));
283 if (status & STAT_INT)
284 break;
285
286
287
288
289 status = readb(reg_dmastat);
290 if (!(status & EESOX_STAT_DMA))
291 continue;
292
293
294
295
296 status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF;
297 if (status > 16)
298 status = 16;
299 status = 16 - status;
300 if (status > length)
301 status = length;
302 status &= ~1;
303
304
305
306
307 if (((u32)buf) & 2 && status >= 2) {
308 writel(*(u16 *)buf << 16, reg_dmadata);
309 buf += 2;
310 status -= 2;
311 length -= 2;
312 }
313
314 if (status >= 8) {
315 unsigned long l1, l2;
316
317 l1 = *(u32 *)buf;
318 buf += 4;
319 l2 = *(u32 *)buf;
320 buf += 4;
321
322 writel(l1 << 16, reg_dmadata);
323 writel(l1, reg_dmadata);
324 writel(l2 << 16, reg_dmadata);
325 writel(l2, reg_dmadata);
326 length -= 8;
327 continue;
328 }
329
330 if (status >= 4) {
331 unsigned long l1;
332
333 l1 = *(u32 *)buf;
334 buf += 4;
335
336 writel(l1 << 16, reg_dmadata);
337 writel(l1, reg_dmadata);
338 length -= 4;
339 continue;
340 }
341
342 if (status >= 2) {
343 writel(*(u16 *)buf << 16, reg_dmadata);
344 buf += 2;
345 length -= 2;
346 }
347 } while (length);
348}
349
350static void
351eesoxscsi_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
352 fasdmadir_t dir, int transfer_size)
353{
354 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
355 if (dir == DMA_IN) {
356 eesoxscsi_buffer_in(SCp->ptr, SCp->this_residual, info->base);
357 } else {
358 eesoxscsi_buffer_out(SCp->ptr, SCp->this_residual, info->base);
359 }
360}
361
362
363
364
365
366
367static void
368eesoxscsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
369{
370 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
371 if (info->info.scsi.dma != NO_DMA)
372 disable_dma(info->info.scsi.dma);
373}
374
375
376
377
378
379
380const char *eesoxscsi_info(struct Scsi_Host *host)
381{
382 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
383 static char string[150];
384
385 sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
386 host->hostt->name, info->info.scsi.type, info->ec->slot_no,
387 VERSION, info->control & EESOX_TERM_ENABLE ? "n" : "ff");
388
389 return string;
390}
391
392
393
394
395
396
397
398
399static int
400eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
401{
402 int ret = length;
403
404 if (length >= 9 && strncmp(buffer, "EESOXSCSI", 9) == 0) {
405 buffer += 9;
406 length -= 9;
407
408 if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
409 if (buffer[5] == '1')
410 eesoxscsi_terminator_ctl(host, 1);
411 else if (buffer[5] == '0')
412 eesoxscsi_terminator_ctl(host, 0);
413 else
414 ret = -EINVAL;
415 } else
416 ret = -EINVAL;
417 } else
418 ret = -EINVAL;
419
420 return ret;
421}
422
423static int eesoxscsi_show_info(struct seq_file *m, struct Scsi_Host *host)
424{
425 struct eesoxscsi_info *info;
426
427 info = (struct eesoxscsi_info *)host->hostdata;
428
429 seq_printf(m, "EESOX SCSI driver v%s\n", VERSION);
430 fas216_print_host(&info->info, m);
431 seq_printf(m, "Term : o%s\n",
432 info->control & EESOX_TERM_ENABLE ? "n" : "ff");
433
434 fas216_print_stats(&info->info, m);
435 fas216_print_devices(&info->info, m);
436 return 0;
437}
438
439static ssize_t eesoxscsi_show_term(struct device *dev, struct device_attribute *attr, char *buf)
440{
441 struct expansion_card *ec = ECARD_DEV(dev);
442 struct Scsi_Host *host = ecard_get_drvdata(ec);
443 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
444
445 return sprintf(buf, "%d\n", info->control & EESOX_TERM_ENABLE ? 1 : 0);
446}
447
448static ssize_t eesoxscsi_store_term(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
449{
450 struct expansion_card *ec = ECARD_DEV(dev);
451 struct Scsi_Host *host = ecard_get_drvdata(ec);
452 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
453 unsigned long flags;
454
455 if (len > 1) {
456 spin_lock_irqsave(host->host_lock, flags);
457 if (buf[0] != '0') {
458 info->control |= EESOX_TERM_ENABLE;
459 } else {
460 info->control &= ~EESOX_TERM_ENABLE;
461 }
462 writeb(info->control, info->ctl_port);
463 spin_unlock_irqrestore(host->host_lock, flags);
464 }
465
466 return len;
467}
468
469static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR,
470 eesoxscsi_show_term, eesoxscsi_store_term);
471
472static struct scsi_host_template eesox_template = {
473 .module = THIS_MODULE,
474 .show_info = eesoxscsi_show_info,
475 .write_info = eesoxscsi_set_proc_info,
476 .name = "EESOX SCSI",
477 .info = eesoxscsi_info,
478 .queuecommand = fas216_queue_command,
479 .eh_host_reset_handler = fas216_eh_host_reset,
480 .eh_bus_reset_handler = fas216_eh_bus_reset,
481 .eh_device_reset_handler = fas216_eh_device_reset,
482 .eh_abort_handler = fas216_eh_abort,
483 .cmd_size = sizeof(struct fas216_cmd_priv),
484 .can_queue = 1,
485 .this_id = 7,
486 .sg_tablesize = SG_MAX_SEGMENTS,
487 .dma_boundary = IOMD_DMA_BOUNDARY,
488 .proc_name = "eesox",
489};
490
491static int eesoxscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
492{
493 struct Scsi_Host *host;
494 struct eesoxscsi_info *info;
495 void __iomem *base;
496 int ret;
497
498 ret = ecard_request_resources(ec);
499 if (ret)
500 goto out;
501
502 base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
503 if (!base) {
504 ret = -ENOMEM;
505 goto out_region;
506 }
507
508 host = scsi_host_alloc(&eesox_template,
509 sizeof(struct eesoxscsi_info));
510 if (!host) {
511 ret = -ENOMEM;
512 goto out_region;
513 }
514
515 ecard_set_drvdata(ec, host);
516
517 info = (struct eesoxscsi_info *)host->hostdata;
518 info->ec = ec;
519 info->base = base;
520 info->ctl_port = base + EESOX_CONTROL;
521 info->control = term[ec->slot_no] ? EESOX_TERM_ENABLE : 0;
522 writeb(info->control, info->ctl_port);
523
524 info->info.scsi.io_base = base + EESOX_FAS216_OFFSET;
525 info->info.scsi.io_shift = EESOX_FAS216_SHIFT;
526 info->info.scsi.irq = ec->irq;
527 info->info.scsi.dma = ec->dma;
528 info->info.ifcfg.clockrate = 40;
529 info->info.ifcfg.select_timeout = 255;
530 info->info.ifcfg.asyncperiod = 200;
531 info->info.ifcfg.sync_max_depth = 7;
532 info->info.ifcfg.cntl3 = CNTL3_FASTSCSI | CNTL3_FASTCLK;
533 info->info.ifcfg.disconnect_ok = 1;
534 info->info.ifcfg.wide_max_size = 0;
535 info->info.ifcfg.capabilities = FASCAP_PSEUDODMA;
536 info->info.dma.setup = eesoxscsi_dma_setup;
537 info->info.dma.pseudo = eesoxscsi_dma_pseudo;
538 info->info.dma.stop = eesoxscsi_dma_stop;
539
540 ec->irqaddr = base + EESOX_DMASTAT;
541 ec->irqmask = EESOX_STAT_INTR;
542
543 ecard_setirq(ec, &eesoxscsi_ops, info);
544
545 device_create_file(&ec->dev, &dev_attr_bus_term);
546
547 ret = fas216_init(host);
548 if (ret)
549 goto out_free;
550
551 ret = request_irq(ec->irq, eesoxscsi_intr, 0, "eesoxscsi", info);
552 if (ret) {
553 printk("scsi%d: IRQ%d not free: %d\n",
554 host->host_no, ec->irq, ret);
555 goto out_remove;
556 }
557
558 if (info->info.scsi.dma != NO_DMA) {
559 if (request_dma(info->info.scsi.dma, "eesox")) {
560 printk("scsi%d: DMA%d not free, DMA disabled\n",
561 host->host_no, info->info.scsi.dma);
562 info->info.scsi.dma = NO_DMA;
563 } else {
564 set_dma_speed(info->info.scsi.dma, 180);
565 info->info.ifcfg.capabilities |= FASCAP_DMA;
566 info->info.ifcfg.cntl3 |= CNTL3_BS8;
567 }
568 }
569
570 ret = fas216_add(host, &ec->dev);
571 if (ret == 0)
572 goto out;
573
574 if (info->info.scsi.dma != NO_DMA)
575 free_dma(info->info.scsi.dma);
576 free_irq(ec->irq, info);
577
578 out_remove:
579 fas216_remove(host);
580
581 out_free:
582 device_remove_file(&ec->dev, &dev_attr_bus_term);
583 scsi_host_put(host);
584
585 out_region:
586 ecard_release_resources(ec);
587
588 out:
589 return ret;
590}
591
592static void eesoxscsi_remove(struct expansion_card *ec)
593{
594 struct Scsi_Host *host = ecard_get_drvdata(ec);
595 struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
596
597 ecard_set_drvdata(ec, NULL);
598 fas216_remove(host);
599
600 if (info->info.scsi.dma != NO_DMA)
601 free_dma(info->info.scsi.dma);
602 free_irq(ec->irq, info);
603
604 device_remove_file(&ec->dev, &dev_attr_bus_term);
605
606 fas216_release(host);
607 scsi_host_put(host);
608 ecard_release_resources(ec);
609}
610
611static const struct ecard_id eesoxscsi_cids[] = {
612 { MANU_EESOX, PROD_EESOX_SCSI2 },
613 { 0xffff, 0xffff },
614};
615
616static struct ecard_driver eesoxscsi_driver = {
617 .probe = eesoxscsi_probe,
618 .remove = eesoxscsi_remove,
619 .id_table = eesoxscsi_cids,
620 .drv = {
621 .name = "eesoxscsi",
622 },
623};
624
625static int __init eesox_init(void)
626{
627 return ecard_register_driver(&eesoxscsi_driver);
628}
629
630static void __exit eesox_exit(void)
631{
632 ecard_remove_driver(&eesoxscsi_driver);
633}
634
635module_init(eesox_init);
636module_exit(eesox_exit);
637
638MODULE_AUTHOR("Russell King");
639MODULE_DESCRIPTION("EESOX 'Fast' SCSI driver for Acorn machines");
640module_param_array(term, int, NULL, 0);
641MODULE_PARM_DESC(term, "SCSI bus termination");
642MODULE_LICENSE("GPL");
643
