1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83#include <linux/module.h>
84#include <linux/slab.h>
85#include <linux/delay.h>
86#include <linux/pci.h>
87#include <linux/interrupt.h>
88
89#include <asm/dma.h>
90
91#include "../comedidev.h"
92
93#include "8253.h"
94#include "8255.h"
95#include "comedi_fc.h"
96
97#define DAS16_DMA_SIZE 0xff00
98
99
100
101
102#define DAS16_TRIG_REG 0x00
103#define DAS16_AI_LSB_REG 0x00
104#define DAS16_AI_MSB_REG 0x01
105#define DAS16_MUX_REG 0x02
106#define DAS16_DIO_REG 0x03
107#define DAS16_AO_LSB_REG(x) ((x) ? 0x06 : 0x04)
108#define DAS16_AO_MSB_REG(x) ((x) ? 0x07 : 0x05)
109#define DAS16_STATUS_REG 0x08
110#define DAS16_STATUS_BUSY (1 << 7)
111#define DAS16_STATUS_UNIPOLAR (1 << 6)
112#define DAS16_STATUS_MUXBIT (1 << 5)
113#define DAS16_STATUS_INT (1 << 4)
114#define DAS16_CTRL_REG 0x09
115#define DAS16_CTRL_INTE (1 << 7)
116#define DAS16_CTRL_IRQ(x) (((x) & 0x7) << 4)
117#define DAS16_CTRL_DMAE (1 << 2)
118#define DAS16_CTRL_PACING_MASK (3 << 0)
119#define DAS16_CTRL_INT_PACER (3 << 0)
120#define DAS16_CTRL_EXT_PACER (2 << 0)
121#define DAS16_CTRL_SOFT_PACER (0 << 0)
122#define DAS16_PACER_REG 0x0a
123#define DAS16_PACER_BURST_LEN(x) (((x) & 0xf) << 4)
124#define DAS16_PACER_CTR0 (1 << 1)
125#define DAS16_PACER_TRIG0 (1 << 0)
126#define DAS16_GAIN_REG 0x0b
127#define DAS16_TIMER_BASE_REG 0x0c
128
129#define DAS1600_CONV_REG 0x404
130#define DAS1600_CONV_DISABLE (1 << 6)
131#define DAS1600_BURST_REG 0x405
132#define DAS1600_BURST_VAL (1 << 6)
133#define DAS1600_ENABLE_REG 0x406
134#define DAS1600_ENABLE_VAL (1 << 6)
135#define DAS1600_STATUS_REG 0x407
136#define DAS1600_STATUS_BME (1 << 6)
137#define DAS1600_STATUS_ME (1 << 5)
138#define DAS1600_STATUS_CD (1 << 4)
139#define DAS1600_STATUS_WS (1 << 1)
140#define DAS1600_STATUS_CLK_10MHZ (1 << 0)
141
142static const struct comedi_lrange range_das1x01_bip = {
143 4, {
144 BIP_RANGE(10),
145 BIP_RANGE(1),
146 BIP_RANGE(0.1),
147 BIP_RANGE(0.01)
148 }
149};
150
151static const struct comedi_lrange range_das1x01_unip = {
152 4, {
153 UNI_RANGE(10),
154 UNI_RANGE(1),
155 UNI_RANGE(0.1),
156 UNI_RANGE(0.01)
157 }
158};
159
160static const struct comedi_lrange range_das1x02_bip = {
161 4, {
162 BIP_RANGE(10),
163 BIP_RANGE(5),
164 BIP_RANGE(2.5),
165 BIP_RANGE(1.25)
166 }
167};
168
169static const struct comedi_lrange range_das1x02_unip = {
170 4, {
171 UNI_RANGE(10),
172 UNI_RANGE(5),
173 UNI_RANGE(2.5),
174 UNI_RANGE(1.25)
175 }
176};
177
178static const struct comedi_lrange range_das16jr = {
179 9, {
180 BIP_RANGE(10),
181 BIP_RANGE(5),
182 BIP_RANGE(2.5),
183 BIP_RANGE(1.25),
184 BIP_RANGE(0.625),
185 UNI_RANGE(10),
186 UNI_RANGE(5),
187 UNI_RANGE(2.5),
188 UNI_RANGE(1.25)
189 }
190};
191
192static const struct comedi_lrange range_das16jr_16 = {
193 8, {
194 BIP_RANGE(10),
195 BIP_RANGE(5),
196 BIP_RANGE(2.5),
197 BIP_RANGE(1.25),
198 UNI_RANGE(10),
199 UNI_RANGE(5),
200 UNI_RANGE(2.5),
201 UNI_RANGE(1.25)
202 }
203};
204
205static const int das16jr_gainlist[] = { 8, 0, 1, 2, 3, 4, 5, 6, 7 };
206static const int das16jr_16_gainlist[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
207static const int das1600_gainlist[] = { 0, 1, 2, 3 };
208
209enum {
210 das16_pg_none = 0,
211 das16_pg_16jr,
212 das16_pg_16jr_16,
213 das16_pg_1601,
214 das16_pg_1602,
215};
216static const int *const das16_gainlists[] = {
217 NULL,
218 das16jr_gainlist,
219 das16jr_16_gainlist,
220 das1600_gainlist,
221 das1600_gainlist,
222};
223
224static const struct comedi_lrange *const das16_ai_uni_lranges[] = {
225 &range_unknown,
226 &range_das16jr,
227 &range_das16jr_16,
228 &range_das1x01_unip,
229 &range_das1x02_unip,
230};
231
232static const struct comedi_lrange *const das16_ai_bip_lranges[] = {
233 &range_unknown,
234 &range_das16jr,
235 &range_das16jr_16,
236 &range_das1x01_bip,
237 &range_das1x02_bip,
238};
239
240struct das16_board {
241 const char *name;
242 unsigned int ai_maxdata;
243 unsigned int ai_speed;
244 unsigned int ai_pg;
245 unsigned int has_ao:1;
246 unsigned int has_8255:1;
247
248 unsigned int i8255_offset;
249
250 unsigned int size;
251 unsigned int id;
252};
253
254static const struct das16_board das16_boards[] = {
255 {
256 .name = "das-16",
257 .ai_maxdata = 0x0fff,
258 .ai_speed = 15000,
259 .ai_pg = das16_pg_none,
260 .has_ao = 1,
261 .has_8255 = 1,
262 .i8255_offset = 0x10,
263 .size = 0x14,
264 .id = 0x00,
265 }, {
266 .name = "das-16g",
267 .ai_maxdata = 0x0fff,
268 .ai_speed = 15000,
269 .ai_pg = das16_pg_none,
270 .has_ao = 1,
271 .has_8255 = 1,
272 .i8255_offset = 0x10,
273 .size = 0x14,
274 .id = 0x00,
275 }, {
276 .name = "das-16f",
277 .ai_maxdata = 0x0fff,
278 .ai_speed = 8500,
279 .ai_pg = das16_pg_none,
280 .has_ao = 1,
281 .has_8255 = 1,
282 .i8255_offset = 0x10,
283 .size = 0x14,
284 .id = 0x00,
285 }, {
286 .name = "cio-das16",
287 .ai_maxdata = 0x0fff,
288 .ai_speed = 20000,
289 .ai_pg = das16_pg_none,
290 .has_ao = 1,
291 .has_8255 = 1,
292 .i8255_offset = 0x10,
293 .size = 0x14,
294 .id = 0x80,
295 }, {
296 .name = "cio-das16/f",
297 .ai_maxdata = 0x0fff,
298 .ai_speed = 10000,
299 .ai_pg = das16_pg_none,
300 .has_ao = 1,
301 .has_8255 = 1,
302 .i8255_offset = 0x10,
303 .size = 0x14,
304 .id = 0x80,
305 }, {
306 .name = "cio-das16/jr",
307 .ai_maxdata = 0x0fff,
308 .ai_speed = 7692,
309 .ai_pg = das16_pg_16jr,
310 .size = 0x10,
311 .id = 0x00,
312 }, {
313 .name = "pc104-das16jr",
314 .ai_maxdata = 0x0fff,
315 .ai_speed = 3300,
316 .ai_pg = das16_pg_16jr,
317 .size = 0x10,
318 .id = 0x00,
319 }, {
320 .name = "cio-das16jr/16",
321 .ai_maxdata = 0xffff,
322 .ai_speed = 10000,
323 .ai_pg = das16_pg_16jr_16,
324 .size = 0x10,
325 .id = 0x00,
326 }, {
327 .name = "pc104-das16jr/16",
328 .ai_maxdata = 0xffff,
329 .ai_speed = 10000,
330 .ai_pg = das16_pg_16jr_16,
331 .size = 0x10,
332 .id = 0x00,
333 }, {
334 .name = "das-1201",
335 .ai_maxdata = 0x0fff,
336 .ai_speed = 20000,
337 .ai_pg = das16_pg_none,
338 .has_8255 = 1,
339 .i8255_offset = 0x400,
340 .size = 0x408,
341 .id = 0x20,
342 }, {
343 .name = "das-1202",
344 .ai_maxdata = 0x0fff,
345 .ai_speed = 10000,
346 .ai_pg = das16_pg_none,
347 .has_8255 = 1,
348 .i8255_offset = 0x400,
349 .size = 0x408,
350 .id = 0x20,
351 }, {
352 .name = "das-1401",
353 .ai_maxdata = 0x0fff,
354 .ai_speed = 10000,
355 .ai_pg = das16_pg_1601,
356 .size = 0x408,
357 .id = 0xc0,
358 }, {
359 .name = "das-1402",
360 .ai_maxdata = 0x0fff,
361 .ai_speed = 10000,
362 .ai_pg = das16_pg_1602,
363 .size = 0x408,
364 .id = 0xc0,
365 }, {
366 .name = "das-1601",
367 .ai_maxdata = 0x0fff,
368 .ai_speed = 10000,
369 .ai_pg = das16_pg_1601,
370 .has_ao = 1,
371 .has_8255 = 1,
372 .i8255_offset = 0x400,
373 .size = 0x408,
374 .id = 0xc0,
375 }, {
376 .name = "das-1602",
377 .ai_maxdata = 0x0fff,
378 .ai_speed = 10000,
379 .ai_pg = das16_pg_1602,
380 .has_ao = 1,
381 .has_8255 = 1,
382 .i8255_offset = 0x400,
383 .size = 0x408,
384 .id = 0xc0,
385 }, {
386 .name = "cio-das1401/12",
387 .ai_maxdata = 0x0fff,
388 .ai_speed = 6250,
389 .ai_pg = das16_pg_1601,
390 .size = 0x408,
391 .id = 0xc0,
392 }, {
393 .name = "cio-das1402/12",
394 .ai_maxdata = 0x0fff,
395 .ai_speed = 6250,
396 .ai_pg = das16_pg_1602,
397 .size = 0x408,
398 .id = 0xc0,
399 }, {
400 .name = "cio-das1402/16",
401 .ai_maxdata = 0xffff,
402 .ai_speed = 10000,
403 .ai_pg = das16_pg_1602,
404 .size = 0x408,
405 .id = 0xc0,
406 }, {
407 .name = "cio-das1601/12",
408 .ai_maxdata = 0x0fff,
409 .ai_speed = 6250,
410 .ai_pg = das16_pg_1601,
411 .has_ao = 1,
412 .has_8255 = 1,
413 .i8255_offset = 0x400,
414 .size = 0x408,
415 .id = 0xc0,
416 }, {
417 .name = "cio-das1602/12",
418 .ai_maxdata = 0x0fff,
419 .ai_speed = 10000,
420 .ai_pg = das16_pg_1602,
421 .has_ao = 1,
422 .has_8255 = 1,
423 .i8255_offset = 0x400,
424 .size = 0x408,
425 .id = 0xc0,
426 }, {
427 .name = "cio-das1602/16",
428 .ai_maxdata = 0xffff,
429 .ai_speed = 10000,
430 .ai_pg = das16_pg_1602,
431 .has_ao = 1,
432 .has_8255 = 1,
433 .i8255_offset = 0x400,
434 .size = 0x408,
435 .id = 0xc0,
436 }, {
437 .name = "cio-das16/330",
438 .ai_maxdata = 0x0fff,
439 .ai_speed = 3030,
440 .ai_pg = das16_pg_16jr,
441 .size = 0x14,
442 .id = 0xf0,
443 },
444};
445
446
447
448static inline int timer_period(void)
449{
450 return HZ / 20;
451}
452
453struct das16_private_struct {
454 unsigned int clockbase;
455 unsigned int ctrl_reg;
456 unsigned long adc_byte_count;
457 unsigned int divisor1;
458 unsigned int divisor2;
459 unsigned int dma_chan;
460 uint16_t *dma_buffer[2];
461 dma_addr_t dma_buffer_addr[2];
462 unsigned int current_buffer;
463 unsigned int dma_transfer_size;
464 struct comedi_lrange *user_ai_range_table;
465 struct comedi_lrange *user_ao_range_table;
466 struct timer_list timer;
467 short timer_running;
468 unsigned long extra_iobase;
469 unsigned int can_burst:1;
470};
471
472static void das16_ai_enable(struct comedi_device *dev,
473 unsigned int mode, unsigned int src)
474{
475 struct das16_private_struct *devpriv = dev->private;
476
477 devpriv->ctrl_reg &= ~(DAS16_CTRL_INTE |
478 DAS16_CTRL_DMAE |
479 DAS16_CTRL_PACING_MASK);
480 devpriv->ctrl_reg |= mode;
481
482 if (src == TRIG_EXT)
483 devpriv->ctrl_reg |= DAS16_CTRL_EXT_PACER;
484 else
485 devpriv->ctrl_reg |= DAS16_CTRL_INT_PACER;
486 outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG);
487}
488
489static void das16_ai_disable(struct comedi_device *dev)
490{
491 struct das16_private_struct *devpriv = dev->private;
492
493
494 devpriv->ctrl_reg &= ~(DAS16_CTRL_INTE |
495 DAS16_CTRL_DMAE |
496 DAS16_CTRL_PACING_MASK);
497 outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG);
498}
499
500
501
502
503
504
505
506static int disable_dma_on_even(struct comedi_device *dev)
507{
508 struct das16_private_struct *devpriv = dev->private;
509 int residue;
510 int i;
511 static const int disable_limit = 100;
512 static const int enable_timeout = 100;
513
514 disable_dma(devpriv->dma_chan);
515 residue = get_dma_residue(devpriv->dma_chan);
516 for (i = 0; i < disable_limit && (residue % 2); ++i) {
517 int j;
518 enable_dma(devpriv->dma_chan);
519 for (j = 0; j < enable_timeout; ++j) {
520 int new_residue;
521 udelay(2);
522 new_residue = get_dma_residue(devpriv->dma_chan);
523 if (new_residue != residue)
524 break;
525 }
526 disable_dma(devpriv->dma_chan);
527 residue = get_dma_residue(devpriv->dma_chan);
528 }
529 if (i == disable_limit) {
530 dev_err(dev->class_dev,
531 "failed to get an even dma transfer, could be trouble\n");
532 }
533 return residue;
534}
535
536static void das16_interrupt(struct comedi_device *dev)
537{
538 struct das16_private_struct *devpriv = dev->private;
539 struct comedi_subdevice *s = dev->read_subdev;
540 struct comedi_async *async = s->async;
541 struct comedi_cmd *cmd = &async->cmd;
542 unsigned long spin_flags;
543 unsigned long dma_flags;
544 int num_bytes, residue;
545 int buffer_index;
546
547 spin_lock_irqsave(&dev->spinlock, spin_flags);
548 if (!(devpriv->ctrl_reg & DAS16_CTRL_DMAE)) {
549 spin_unlock_irqrestore(&dev->spinlock, spin_flags);
550 return;
551 }
552
553 dma_flags = claim_dma_lock();
554 clear_dma_ff(devpriv->dma_chan);
555 residue = disable_dma_on_even(dev);
556
557
558 if (residue > devpriv->dma_transfer_size) {
559 dev_err(dev->class_dev, "residue > transfer size!\n");
560 async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
561 num_bytes = 0;
562 } else
563 num_bytes = devpriv->dma_transfer_size - residue;
564
565 if (cmd->stop_src == TRIG_COUNT &&
566 num_bytes >= devpriv->adc_byte_count) {
567 num_bytes = devpriv->adc_byte_count;
568 async->events |= COMEDI_CB_EOA;
569 }
570
571 buffer_index = devpriv->current_buffer;
572 devpriv->current_buffer = (devpriv->current_buffer + 1) % 2;
573 devpriv->adc_byte_count -= num_bytes;
574
575
576 if ((async->events & COMEDI_CB_EOA) == 0) {
577 set_dma_addr(devpriv->dma_chan,
578 devpriv->dma_buffer_addr[devpriv->current_buffer]);
579 set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size);
580 enable_dma(devpriv->dma_chan);
581 }
582 release_dma_lock(dma_flags);
583
584 spin_unlock_irqrestore(&dev->spinlock, spin_flags);
585
586 cfc_write_array_to_buffer(s,
587 devpriv->dma_buffer[buffer_index], num_bytes);
588
589 cfc_handle_events(dev, s);
590}
591
592static void das16_timer_interrupt(unsigned long arg)
593{
594 struct comedi_device *dev = (struct comedi_device *)arg;
595 struct das16_private_struct *devpriv = dev->private;
596
597 das16_interrupt(dev);
598
599 if (devpriv->timer_running)
600 mod_timer(&devpriv->timer, jiffies + timer_period());
601}
602
603static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
604 struct comedi_cmd *cmd)
605{
606 const struct das16_board *board = comedi_board(dev);
607 struct das16_private_struct *devpriv = dev->private;
608 int err = 0, tmp;
609 int gain, start_chan, i;
610 int mask;
611
612
613
614 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
615
616 mask = TRIG_FOLLOW;
617 if (devpriv->can_burst)
618 mask |= TRIG_TIMER | TRIG_EXT;
619 err |= cfc_check_trigger_src(&cmd->scan_begin_src, mask);
620
621 tmp = cmd->convert_src;
622 mask = TRIG_TIMER | TRIG_EXT;
623 if (devpriv->can_burst)
624 mask |= TRIG_NOW;
625 err |= cfc_check_trigger_src(&cmd->convert_src, mask);
626
627 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
628 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
629
630 if (err)
631 return 1;
632
633
634
635 err |= cfc_check_trigger_is_unique(cmd->scan_begin_src);
636 err |= cfc_check_trigger_is_unique(cmd->convert_src);
637 err |= cfc_check_trigger_is_unique(cmd->stop_src);
638
639
640
641
642 if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW)
643 err |= -EINVAL;
644 if (cmd->scan_begin_src != TRIG_FOLLOW && cmd->convert_src != TRIG_NOW)
645 err |= -EINVAL;
646
647 if (err)
648 return 2;
649
650
651
652 err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
653
654 if (cmd->scan_begin_src == TRIG_FOLLOW)
655 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
656
657 err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
658
659
660 if (cmd->scan_begin_src == TRIG_TIMER)
661 err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
662 board->ai_speed * cmd->chanlist_len);
663
664 if (cmd->convert_src == TRIG_TIMER)
665 err |= cfc_check_trigger_arg_min(&cmd->convert_arg,
666 board->ai_speed);
667
668 if (cmd->stop_src == TRIG_NONE)
669 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
670
671 if (err)
672 return 3;
673
674
675 if (cmd->scan_begin_src == TRIG_TIMER) {
676 unsigned int tmp = cmd->scan_begin_arg;
677
678 i8253_cascade_ns_to_timer_2div(devpriv->clockbase,
679 &devpriv->divisor1,
680 &devpriv->divisor2,
681 &cmd->scan_begin_arg,
682 cmd->flags & TRIG_ROUND_MASK);
683 err += (tmp != cmd->scan_begin_arg);
684 }
685 if (cmd->convert_src == TRIG_TIMER) {
686 unsigned int tmp = cmd->convert_arg;
687
688 i8253_cascade_ns_to_timer_2div(devpriv->clockbase,
689 &devpriv->divisor1,
690 &devpriv->divisor2,
691 &cmd->convert_arg,
692 cmd->flags & TRIG_ROUND_MASK);
693 err += (tmp != cmd->convert_arg);
694 }
695 if (err)
696 return 4;
697
698
699 if (cmd->chanlist) {
700 gain = CR_RANGE(cmd->chanlist[0]);
701 start_chan = CR_CHAN(cmd->chanlist[0]);
702 for (i = 1; i < cmd->chanlist_len; i++) {
703 if (CR_CHAN(cmd->chanlist[i]) !=
704 (start_chan + i) % s->n_chan) {
705 dev_err(dev->class_dev,
706 "entries in chanlist must be consecutive channels, counting upwards\n");
707 err++;
708 }
709 if (CR_RANGE(cmd->chanlist[i]) != gain) {
710 dev_err(dev->class_dev,
711 "entries in chanlist must all have the same gain\n");
712 err++;
713 }
714 }
715 }
716 if (err)
717 return 5;
718
719 return 0;
720}
721
722static unsigned int das16_set_pacer(struct comedi_device *dev, unsigned int ns,
723 int rounding_flags)
724{
725 struct das16_private_struct *devpriv = dev->private;
726 unsigned long timer_base = dev->iobase + DAS16_TIMER_BASE_REG;
727
728 i8253_cascade_ns_to_timer_2div(devpriv->clockbase,
729 &devpriv->divisor1,
730 &devpriv->divisor2,
731 &ns,
732 rounding_flags & TRIG_ROUND_MASK);
733
734
735 i8254_load(timer_base, 0, 1, devpriv->divisor1, 2);
736 i8254_load(timer_base, 0, 2, devpriv->divisor2, 2);
737
738 return ns;
739}
740
741static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s)
742{
743 const struct das16_board *board = comedi_board(dev);
744 struct das16_private_struct *devpriv = dev->private;
745 struct comedi_async *async = s->async;
746 struct comedi_cmd *cmd = &async->cmd;
747 unsigned int byte;
748 unsigned long flags;
749 int range;
750
751 if (cmd->flags & TRIG_RT) {
752 dev_err(dev->class_dev,
753 "isa dma transfers cannot be performed with TRIG_RT, aborting\n");
754 return -1;
755 }
756
757 devpriv->adc_byte_count =
758 cmd->stop_arg * cmd->chanlist_len * sizeof(uint16_t);
759
760 if (devpriv->can_burst)
761 outb(DAS1600_CONV_DISABLE, dev->iobase + DAS1600_CONV_REG);
762
763
764 byte = CR_CHAN(cmd->chanlist[0]);
765 byte |= CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]) << 4;
766 outb(byte, dev->iobase + DAS16_MUX_REG);
767
768
769
770
771 if (board->ai_pg != das16_pg_none) {
772 range = CR_RANGE(cmd->chanlist[0]);
773 outb((das16_gainlists[board->ai_pg])[range],
774 dev->iobase + DAS16_GAIN_REG);
775 }
776
777
778 cmd->convert_arg =
779 das16_set_pacer(dev, cmd->convert_arg,
780 cmd->flags & TRIG_ROUND_MASK);
781
782
783 byte = 0;
784 if (devpriv->can_burst) {
785 if (cmd->convert_src == TRIG_NOW) {
786 outb(DAS1600_BURST_VAL,
787 dev->iobase + DAS1600_BURST_REG);
788
789 byte |= DAS16_PACER_BURST_LEN(cmd->chanlist_len - 1);
790 } else {
791 outb(0, dev->iobase + DAS1600_BURST_REG);
792 }
793 }
794 outb(byte, dev->iobase + DAS16_PACER_REG);
795
796
797 flags = claim_dma_lock();
798 disable_dma(devpriv->dma_chan);
799
800
801 clear_dma_ff(devpriv->dma_chan);
802 devpriv->current_buffer = 0;
803 set_dma_addr(devpriv->dma_chan,
804 devpriv->dma_buffer_addr[devpriv->current_buffer]);
805 devpriv->dma_transfer_size = DAS16_DMA_SIZE;
806 set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size);
807 enable_dma(devpriv->dma_chan);
808 release_dma_lock(flags);
809
810
811 devpriv->timer_running = 1;
812 devpriv->timer.expires = jiffies + timer_period();
813 add_timer(&devpriv->timer);
814
815 das16_ai_enable(dev, DAS16_CTRL_DMAE, cmd->convert_src);
816
817 if (devpriv->can_burst)
818 outb(0, dev->iobase + DAS1600_CONV_REG);
819
820 return 0;
821}
822
823static int das16_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
824{
825 struct das16_private_struct *devpriv = dev->private;
826 unsigned long flags;
827
828 spin_lock_irqsave(&dev->spinlock, flags);
829
830 das16_ai_disable(dev);
831 disable_dma(devpriv->dma_chan);
832
833
834 if (devpriv->timer_running) {
835 devpriv->timer_running = 0;
836 del_timer(&devpriv->timer);
837 }
838
839 if (devpriv->can_burst)
840 outb(0, dev->iobase + DAS1600_BURST_REG);
841
842 spin_unlock_irqrestore(&dev->spinlock, flags);
843
844 return 0;
845}
846
847static void das16_ai_munge(struct comedi_device *dev,
848 struct comedi_subdevice *s, void *array,
849 unsigned int num_bytes,
850 unsigned int start_chan_index)
851{
852 unsigned int i, num_samples = num_bytes / sizeof(short);
853 short *data = array;
854
855 for (i = 0; i < num_samples; i++) {
856 data[i] = le16_to_cpu(data[i]);
857 if (s->maxdata == 0x0fff)
858 data[i] >>= 4;
859 data[i] &= s->maxdata;
860 }
861}
862
863static int das16_ai_wait_for_conv(struct comedi_device *dev,
864 unsigned int timeout)
865{
866 unsigned int status;
867 int i;
868
869 for (i = 0; i < timeout; i++) {
870 status = inb(dev->iobase + DAS16_STATUS_REG);
871 if (!(status & DAS16_STATUS_BUSY))
872 return 0;
873 }
874 return -ETIME;
875}
876
877static int das16_ai_insn_read(struct comedi_device *dev,
878 struct comedi_subdevice *s,
879 struct comedi_insn *insn,
880 unsigned int *data)
881{
882 const struct das16_board *board = comedi_board(dev);
883 unsigned int chan = CR_CHAN(insn->chanspec);
884 unsigned int range = CR_RANGE(insn->chanspec);
885 unsigned int val;
886 int ret;
887 int i;
888
889 das16_ai_disable(dev);
890
891
892 outb(chan | (chan << 4), dev->iobase + DAS16_MUX_REG);
893
894
895 if (board->ai_pg != das16_pg_none) {
896 outb((das16_gainlists[board->ai_pg])[range],
897 dev->iobase + DAS16_GAIN_REG);
898 }
899
900 for (i = 0; i < insn->n; i++) {
901
902 outb_p(0, dev->iobase + DAS16_TRIG_REG);
903
904 ret = das16_ai_wait_for_conv(dev, 1000);
905 if (ret)
906 return ret;
907
908 val = inb(dev->iobase + DAS16_AI_MSB_REG) << 8;
909 val |= inb(dev->iobase + DAS16_AI_LSB_REG);
910 if (s->maxdata == 0x0fff)
911 val >>= 4;
912 val &= s->maxdata;
913
914 data[i] = val;
915 }
916
917 return insn->n;
918}
919
920static int das16_ao_insn_write(struct comedi_device *dev,
921 struct comedi_subdevice *s,
922 struct comedi_insn *insn,
923 unsigned int *data)
924{
925 unsigned int chan = CR_CHAN(insn->chanspec);
926 unsigned int val;
927 int i;
928
929 for (i = 0; i < insn->n; i++) {
930 val = data[i];
931 val <<= 4;
932
933 outb(val & 0xff, dev->iobase + DAS16_AO_LSB_REG(chan));
934 outb((val >> 8) & 0xff, dev->iobase + DAS16_AO_MSB_REG(chan));
935 }
936
937 return insn->n;
938}
939
940static int das16_di_insn_bits(struct comedi_device *dev,
941 struct comedi_subdevice *s,
942 struct comedi_insn *insn,
943 unsigned int *data)
944{
945 data[1] = inb(dev->iobase + DAS16_DIO_REG) & 0xf;
946
947 return insn->n;
948}
949
950static int das16_do_insn_bits(struct comedi_device *dev,
951 struct comedi_subdevice *s,
952 struct comedi_insn *insn,
953 unsigned int *data)
954{
955 unsigned int mask = data[0];
956 unsigned int bits = data[1];
957
958 if (mask) {
959 s->state &= ~mask;
960 s->state |= (bits & mask);
961
962 outb(s->state, dev->iobase + DAS16_DIO_REG);
963 }
964
965 data[1] = s->state;
966
967 return insn->n;
968}
969
970static int das16_probe(struct comedi_device *dev, struct comedi_devconfig *it)
971{
972 const struct das16_board *board = comedi_board(dev);
973 int diobits;
974
975
976 diobits = inb(dev->iobase + DAS16_DIO_REG) & 0xf0;
977 if (board->id != diobits) {
978 dev_err(dev->class_dev,
979 "requested board's id bits are incorrect (0x%x != 0x%x)\n",
980 board->id, diobits);
981 return -EINVAL;
982 }
983
984 return 0;
985}
986
987static void das16_reset(struct comedi_device *dev)
988{
989 outb(0, dev->iobase + DAS16_STATUS_REG);
990 outb(0, dev->iobase + DAS16_CTRL_REG);
991 outb(0, dev->iobase + DAS16_PACER_REG);
992 outb(0, dev->iobase + DAS16_TIMER_BASE_REG + i8254_control_reg);
993}
994
995static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
996{
997 const struct das16_board *board = comedi_board(dev);
998 struct das16_private_struct *devpriv;
999 struct comedi_subdevice *s;
1000 struct comedi_lrange *lrange;
1001 struct comedi_krange *krange;
1002 unsigned int dma_chan = it->options[2];
1003 unsigned int status;
1004 int ret;
1005
1006
1007 if (it->options[3]) {
1008 if (it->options[3] != 0 &&
1009 it->options[3] != 1 && it->options[3] != 10) {
1010 dev_err(dev->class_dev,
1011 "Invalid option. Master clock must be set to 1 or 10 (MHz)\n");
1012 return -EINVAL;
1013 }
1014 }
1015
1016 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1017 if (!devpriv)
1018 return -ENOMEM;
1019
1020 if (board->size < 0x400) {
1021 ret = comedi_request_region(dev, it->options[0], board->size);
1022 if (ret)
1023 return ret;
1024 } else {
1025 ret = comedi_request_region(dev, it->options[0], 0x10);
1026 if (ret)
1027 return ret;
1028
1029 ret = __comedi_request_region(dev, dev->iobase + 0x400,
1030 board->size & 0x3ff);
1031 if (ret)
1032 return ret;
1033 devpriv->extra_iobase = dev->iobase + 0x400;
1034 devpriv->can_burst = 1;
1035 }
1036
1037
1038 if (das16_probe(dev, it))
1039 return -EINVAL;
1040
1041
1042 if (devpriv->can_burst) {
1043 status = inb(dev->iobase + DAS1600_STATUS_REG);
1044
1045 if (status & DAS1600_STATUS_CLK_10MHZ)
1046 devpriv->clockbase = 100;
1047 else
1048 devpriv->clockbase = 1000;
1049 } else {
1050 if (it->options[3])
1051 devpriv->clockbase = 1000 / it->options[3];
1052 else
1053 devpriv->clockbase = 1000;
1054 }
1055
1056
1057 if (dma_chan == 1 || dma_chan == 3) {
1058 unsigned long flags;
1059 int i;
1060
1061 if (request_dma(dma_chan, dev->board_name)) {
1062 dev_err(dev->class_dev,
1063 "failed to request dma channel %i\n",
1064 dma_chan);
1065 return -EINVAL;
1066 }
1067 devpriv->dma_chan = dma_chan;
1068
1069
1070 for (i = 0; i < 2; i++) {
1071 void *p;
1072
1073 p = pci_alloc_consistent(NULL, DAS16_DMA_SIZE,
1074 &devpriv->dma_buffer_addr[i]);
1075 if (!p)
1076 return -ENOMEM;
1077 devpriv->dma_buffer[i] = p;
1078 }
1079
1080 flags = claim_dma_lock();
1081 disable_dma(devpriv->dma_chan);
1082 set_dma_mode(devpriv->dma_chan, DMA_MODE_READ);
1083 release_dma_lock(flags);
1084
1085 init_timer(&devpriv->timer);
1086 devpriv->timer.function = das16_timer_interrupt;
1087 devpriv->timer.data = (unsigned long)dev;
1088 }
1089
1090
1091 if (board->ai_pg == das16_pg_none &&
1092 (it->options[4] || it->options[5])) {
1093
1094 lrange = kzalloc(sizeof(*lrange) + sizeof(*krange), GFP_KERNEL);
1095 if (!lrange)
1096 return -ENOMEM;
1097
1098
1099 devpriv->user_ai_range_table = lrange;
1100 lrange->length = 1;
1101 krange = devpriv->user_ai_range_table->range;
1102 krange->min = it->options[4];
1103 krange->max = it->options[5];
1104 krange->flags = UNIT_volt;
1105 }
1106
1107
1108 if (it->options[6] || it->options[7]) {
1109
1110 lrange = kzalloc(sizeof(*lrange) + sizeof(*krange), GFP_KERNEL);
1111 if (!lrange)
1112 return -ENOMEM;
1113
1114
1115 devpriv->user_ao_range_table = lrange;
1116 lrange->length = 1;
1117 krange = devpriv->user_ao_range_table->range;
1118 krange->min = it->options[6];
1119 krange->max = it->options[7];
1120 krange->flags = UNIT_volt;
1121 }
1122
1123 ret = comedi_alloc_subdevices(dev, 4 + board->has_8255);
1124 if (ret)
1125 return ret;
1126
1127 status = inb(dev->iobase + DAS16_STATUS_REG);
1128
1129
1130 s = &dev->subdevices[0];
1131 s->type = COMEDI_SUBD_AI;
1132 s->subdev_flags = SDF_READABLE;
1133 if (status & DAS16_STATUS_MUXBIT) {
1134 s->subdev_flags |= SDF_GROUND;
1135 s->n_chan = 16;
1136 } else {
1137 s->subdev_flags |= SDF_DIFF;
1138 s->n_chan = 8;
1139 }
1140 s->len_chanlist = s->n_chan;
1141 s->maxdata = board->ai_maxdata;
1142 if (devpriv->user_ai_range_table) {
1143 s->range_table = devpriv->user_ai_range_table;
1144 } else if (status & DAS16_STATUS_UNIPOLAR) {
1145 s->range_table = das16_ai_uni_lranges[board->ai_pg];
1146 } else {
1147 s->range_table = das16_ai_bip_lranges[board->ai_pg];
1148 }
1149 s->insn_read = das16_ai_insn_read;
1150 if (devpriv->dma_chan) {
1151 dev->read_subdev = s;
1152 s->subdev_flags |= SDF_CMD_READ;
1153 s->do_cmdtest = das16_cmd_test;
1154 s->do_cmd = das16_cmd_exec;
1155 s->cancel = das16_cancel;
1156 s->munge = das16_ai_munge;
1157 }
1158
1159
1160 s = &dev->subdevices[1];
1161 if (board->has_ao) {
1162 s->type = COMEDI_SUBD_AO;
1163 s->subdev_flags = SDF_WRITABLE;
1164 s->n_chan = 2;
1165 s->maxdata = 0x0fff;
1166 s->range_table = devpriv->user_ao_range_table;
1167 s->insn_write = das16_ao_insn_write;
1168 } else {
1169 s->type = COMEDI_SUBD_UNUSED;
1170 }
1171
1172
1173 s = &dev->subdevices[2];
1174 s->type = COMEDI_SUBD_DI;
1175 s->subdev_flags = SDF_READABLE;
1176 s->n_chan = 4;
1177 s->maxdata = 1;
1178 s->range_table = &range_digital;
1179 s->insn_bits = das16_di_insn_bits;
1180
1181
1182 s = &dev->subdevices[3];
1183 s->type = COMEDI_SUBD_DO;
1184 s->subdev_flags = SDF_WRITABLE;
1185 s->n_chan = 4;
1186 s->maxdata = 1;
1187 s->range_table = &range_digital;
1188 s->insn_bits = das16_do_insn_bits;
1189
1190
1191 outb(s->state, dev->iobase + DAS16_DIO_REG);
1192
1193
1194 if (board->has_8255) {
1195 s = &dev->subdevices[4];
1196 ret = subdev_8255_init(dev, s, NULL,
1197 dev->iobase + board->i8255_offset);
1198 if (ret)
1199 return ret;
1200 }
1201
1202 das16_reset(dev);
1203
1204 devpriv->ctrl_reg = DAS16_CTRL_IRQ(dev->irq);
1205 outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG);
1206
1207 if (devpriv->can_burst) {
1208 outb(DAS1600_ENABLE_VAL, dev->iobase + DAS1600_ENABLE_REG);
1209 outb(0, dev->iobase + DAS1600_CONV_REG);
1210 outb(0, dev->iobase + DAS1600_BURST_REG);
1211 }
1212
1213 return 0;
1214}
1215
1216static void das16_detach(struct comedi_device *dev)
1217{
1218 const struct das16_board *board = comedi_board(dev);
1219 struct das16_private_struct *devpriv = dev->private;
1220 int i;
1221
1222 if (devpriv) {
1223 if (dev->iobase)
1224 das16_reset(dev);
1225
1226 for (i = 0; i < 2; i++) {
1227 if (devpriv->dma_buffer[i])
1228 pci_free_consistent(NULL, DAS16_DMA_SIZE,
1229 devpriv->dma_buffer[i],
1230 devpriv->
1231 dma_buffer_addr[i]);
1232 }
1233 if (devpriv->dma_chan)
1234 free_dma(devpriv->dma_chan);
1235 kfree(devpriv->user_ai_range_table);
1236 kfree(devpriv->user_ao_range_table);
1237
1238 if (devpriv->extra_iobase)
1239 release_region(devpriv->extra_iobase,
1240 board->size & 0x3ff);
1241 }
1242
1243 comedi_legacy_detach(dev);
1244}
1245
1246static struct comedi_driver das16_driver = {
1247 .driver_name = "das16",
1248 .module = THIS_MODULE,
1249 .attach = das16_attach,
1250 .detach = das16_detach,
1251 .board_name = &das16_boards[0].name,
1252 .num_names = ARRAY_SIZE(das16_boards),
1253 .offset = sizeof(das16_boards[0]),
1254};
1255module_comedi_driver(das16_driver);
1256
1257MODULE_AUTHOR("Comedi http://www.comedi.org");
1258MODULE_DESCRIPTION("Comedi driver for DAS16 compatible boards");
1259MODULE_LICENSE("GPL");
1260
