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25#include <linux/module.h>
26#include <linux/interrupt.h>
27
28#include "../comedidev.h"
29
30#include "comedi_8254.h"
31
32
33
34
35#define DAS6402_AI_DATA_REG 0x00
36#define DAS6402_AI_MUX_REG 0x02
37#define DAS6402_AI_MUX_LO(x) (((x) & 0x3f) << 0)
38#define DAS6402_AI_MUX_HI(x) (((x) & 0x3f) << 8)
39#define DAS6402_DI_DO_REG 0x03
40#define DAS6402_AO_DATA_REG(x) (0x04 + ((x) * 2))
41#define DAS6402_AO_LSB_REG(x) (0x04 + ((x) * 2))
42#define DAS6402_AO_MSB_REG(x) (0x05 + ((x) * 2))
43#define DAS6402_STATUS_REG 0x08
44#define DAS6402_STATUS_FFNE BIT(0)
45#define DAS6402_STATUS_FHALF BIT(1)
46#define DAS6402_STATUS_FFULL BIT(2)
47#define DAS6402_STATUS_XINT BIT(3)
48#define DAS6402_STATUS_INT BIT(4)
49#define DAS6402_STATUS_XTRIG BIT(5)
50#define DAS6402_STATUS_INDGT BIT(6)
51#define DAS6402_STATUS_10MHZ BIT(7)
52#define DAS6402_STATUS_W_CLRINT BIT(0)
53#define DAS6402_STATUS_W_CLRXTR BIT(1)
54#define DAS6402_STATUS_W_CLRXIN BIT(2)
55#define DAS6402_STATUS_W_EXTEND BIT(4)
56#define DAS6402_STATUS_W_ARMED BIT(5)
57#define DAS6402_STATUS_W_POSTMODE BIT(6)
58#define DAS6402_STATUS_W_10MHZ BIT(7)
59#define DAS6402_CTRL_REG 0x09
60#define DAS6402_CTRL_TRIG(x) ((x) << 0)
61#define DAS6402_CTRL_SOFT_TRIG DAS6402_CTRL_TRIG(0)
62#define DAS6402_CTRL_EXT_FALL_TRIG DAS6402_CTRL_TRIG(1)
63#define DAS6402_CTRL_EXT_RISE_TRIG DAS6402_CTRL_TRIG(2)
64#define DAS6402_CTRL_PACER_TRIG DAS6402_CTRL_TRIG(3)
65#define DAS6402_CTRL_BURSTEN BIT(2)
66#define DAS6402_CTRL_XINTE BIT(3)
67#define DAS6402_CTRL_IRQ(x) ((x) << 4)
68#define DAS6402_CTRL_INTE BIT(7)
69#define DAS6402_TRIG_REG 0x0a
70#define DAS6402_TRIG_TGEN BIT(0)
71#define DAS6402_TRIG_TGSEL BIT(1)
72#define DAS6402_TRIG_TGPOL BIT(2)
73#define DAS6402_TRIG_PRETRIG BIT(3)
74#define DAS6402_AO_RANGE(_chan, _range) ((_range) << ((_chan) ? 6 : 4))
75#define DAS6402_AO_RANGE_MASK(_chan) (3 << ((_chan) ? 6 : 4))
76#define DAS6402_MODE_REG 0x0b
77#define DAS6402_MODE_RANGE(x) ((x) << 2)
78#define DAS6402_MODE_POLLED DAS6402_MODE_RANGE(0)
79#define DAS6402_MODE_FIFONEPTY DAS6402_MODE_RANGE(1)
80#define DAS6402_MODE_FIFOHFULL DAS6402_MODE_RANGE(2)
81#define DAS6402_MODE_EOB DAS6402_MODE_RANGE(3)
82#define DAS6402_MODE_ENHANCED BIT(4)
83#define DAS6402_MODE_SE BIT(5)
84#define DAS6402_MODE_UNI BIT(6)
85#define DAS6402_MODE_DMA(x) ((x) << 7)
86#define DAS6402_MODE_DMA1 DAS6402_MODE_DMA(0)
87#define DAS6402_MODE_DMA3 DAS6402_MODE_DMA(1)
88#define DAS6402_TIMER_BASE 0x0c
89
90static const struct comedi_lrange das6402_ai_ranges = {
91 8, {
92 BIP_RANGE(10),
93 BIP_RANGE(5),
94 BIP_RANGE(2.5),
95 BIP_RANGE(1.25),
96 UNI_RANGE(10),
97 UNI_RANGE(5),
98 UNI_RANGE(2.5),
99 UNI_RANGE(1.25)
100 }
101};
102
103
104
105
106
107
108static const struct comedi_lrange das6402_ao_ranges = {
109 4, {
110 BIP_RANGE(5),
111 BIP_RANGE(10),
112 UNI_RANGE(5),
113 UNI_RANGE(10)
114 }
115};
116
117struct das6402_boardinfo {
118 const char *name;
119 unsigned int maxdata;
120};
121
122static struct das6402_boardinfo das6402_boards[] = {
123 {
124 .name = "das6402-12",
125 .maxdata = 0x0fff,
126 }, {
127 .name = "das6402-16",
128 .maxdata = 0xffff,
129 },
130};
131
132struct das6402_private {
133 unsigned int irq;
134 unsigned int ao_range;
135};
136
137static void das6402_set_mode(struct comedi_device *dev,
138 unsigned int mode)
139{
140 outb(DAS6402_MODE_ENHANCED | mode, dev->iobase + DAS6402_MODE_REG);
141}
142
143static void das6402_set_extended(struct comedi_device *dev,
144 unsigned int val)
145{
146 outb(DAS6402_STATUS_W_EXTEND, dev->iobase + DAS6402_STATUS_REG);
147 outb(DAS6402_STATUS_W_EXTEND | val, dev->iobase + DAS6402_STATUS_REG);
148 outb(val, dev->iobase + DAS6402_STATUS_REG);
149}
150
151static void das6402_clear_all_interrupts(struct comedi_device *dev)
152{
153 outb(DAS6402_STATUS_W_CLRINT |
154 DAS6402_STATUS_W_CLRXTR |
155 DAS6402_STATUS_W_CLRXIN, dev->iobase + DAS6402_STATUS_REG);
156}
157
158static void das6402_ai_clear_eoc(struct comedi_device *dev)
159{
160 outb(DAS6402_STATUS_W_CLRINT, dev->iobase + DAS6402_STATUS_REG);
161}
162
163static unsigned int das6402_ai_read_sample(struct comedi_device *dev,
164 struct comedi_subdevice *s)
165{
166 unsigned int val;
167
168 val = inw(dev->iobase + DAS6402_AI_DATA_REG);
169 if (s->maxdata == 0x0fff)
170 val >>= 4;
171 return val;
172}
173
174static irqreturn_t das6402_interrupt(int irq, void *d)
175{
176 struct comedi_device *dev = d;
177 struct comedi_subdevice *s = dev->read_subdev;
178 struct comedi_async *async = s->async;
179 struct comedi_cmd *cmd = &async->cmd;
180 unsigned int status;
181
182 status = inb(dev->iobase + DAS6402_STATUS_REG);
183 if ((status & DAS6402_STATUS_INT) == 0)
184 return IRQ_NONE;
185
186 if (status & DAS6402_STATUS_FFULL) {
187 async->events |= COMEDI_CB_OVERFLOW;
188 } else if (status & DAS6402_STATUS_FFNE) {
189 unsigned int val;
190
191 val = das6402_ai_read_sample(dev, s);
192 comedi_buf_write_samples(s, &val, 1);
193
194 if (cmd->stop_src == TRIG_COUNT &&
195 async->scans_done >= cmd->stop_arg)
196 async->events |= COMEDI_CB_EOA;
197 }
198
199 das6402_clear_all_interrupts(dev);
200
201 comedi_handle_events(dev, s);
202
203 return IRQ_HANDLED;
204}
205
206static void das6402_ai_set_mode(struct comedi_device *dev,
207 struct comedi_subdevice *s,
208 unsigned int chanspec,
209 unsigned int mode)
210{
211 unsigned int range = CR_RANGE(chanspec);
212 unsigned int aref = CR_AREF(chanspec);
213
214 mode |= DAS6402_MODE_RANGE(range);
215 if (aref == AREF_GROUND)
216 mode |= DAS6402_MODE_SE;
217 if (comedi_range_is_unipolar(s, range))
218 mode |= DAS6402_MODE_UNI;
219
220 das6402_set_mode(dev, mode);
221}
222
223static int das6402_ai_cmd(struct comedi_device *dev,
224 struct comedi_subdevice *s)
225{
226 struct das6402_private *devpriv = dev->private;
227 struct comedi_cmd *cmd = &s->async->cmd;
228 unsigned int chan_lo = CR_CHAN(cmd->chanlist[0]);
229 unsigned int chan_hi = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]);
230
231 das6402_ai_set_mode(dev, s, cmd->chanlist[0], DAS6402_MODE_FIFONEPTY);
232
233
234 outw(DAS6402_AI_MUX_HI(chan_hi) | DAS6402_AI_MUX_LO(chan_lo),
235 dev->iobase + DAS6402_AI_MUX_REG);
236
237 comedi_8254_update_divisors(dev->pacer);
238 comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
239
240
241 outb(DAS6402_CTRL_INTE |
242 DAS6402_CTRL_IRQ(devpriv->irq) |
243 DAS6402_CTRL_PACER_TRIG, dev->iobase + DAS6402_CTRL_REG);
244
245 return 0;
246}
247
248static int das6402_ai_check_chanlist(struct comedi_device *dev,
249 struct comedi_subdevice *s,
250 struct comedi_cmd *cmd)
251{
252 unsigned int chan0 = CR_CHAN(cmd->chanlist[0]);
253 unsigned int range0 = CR_RANGE(cmd->chanlist[0]);
254 unsigned int aref0 = CR_AREF(cmd->chanlist[0]);
255 int i;
256
257 for (i = 1; i < cmd->chanlist_len; i++) {
258 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
259 unsigned int range = CR_RANGE(cmd->chanlist[i]);
260 unsigned int aref = CR_AREF(cmd->chanlist[i]);
261
262 if (chan != chan0 + i) {
263 dev_dbg(dev->class_dev,
264 "chanlist must be consecutive\n");
265 return -EINVAL;
266 }
267
268 if (range != range0) {
269 dev_dbg(dev->class_dev,
270 "chanlist must have the same range\n");
271 return -EINVAL;
272 }
273
274 if (aref != aref0) {
275 dev_dbg(dev->class_dev,
276 "chanlist must have the same reference\n");
277 return -EINVAL;
278 }
279
280 if (aref0 == AREF_DIFF && chan > (s->n_chan / 2)) {
281 dev_dbg(dev->class_dev,
282 "chanlist differential channel to large\n");
283 return -EINVAL;
284 }
285 }
286 return 0;
287}
288
289static int das6402_ai_cmdtest(struct comedi_device *dev,
290 struct comedi_subdevice *s,
291 struct comedi_cmd *cmd)
292{
293 int err = 0;
294 unsigned int arg;
295
296
297
298 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
299 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
300 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_TIMER);
301 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
302 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
303
304 if (err)
305 return 1;
306
307
308
309 err |= comedi_check_trigger_is_unique(cmd->stop_src);
310
311
312
313 if (err)
314 return 2;
315
316
317
318 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
319 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
320 err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 10000);
321 err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1);
322 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
323 cmd->chanlist_len);
324
325 if (cmd->stop_src == TRIG_COUNT)
326 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
327 else
328 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
329
330 if (err)
331 return 3;
332
333
334
335 arg = cmd->convert_arg;
336 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
337 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
338
339 if (err)
340 return 4;
341
342
343 if (cmd->chanlist && cmd->chanlist_len > 0)
344 err |= das6402_ai_check_chanlist(dev, s, cmd);
345
346 if (err)
347 return 5;
348
349 return 0;
350}
351
352static int das6402_ai_cancel(struct comedi_device *dev,
353 struct comedi_subdevice *s)
354{
355 outb(DAS6402_CTRL_SOFT_TRIG, dev->iobase + DAS6402_CTRL_REG);
356
357 return 0;
358}
359
360static void das6402_ai_soft_trig(struct comedi_device *dev)
361{
362 outw(0, dev->iobase + DAS6402_AI_DATA_REG);
363}
364
365static int das6402_ai_eoc(struct comedi_device *dev,
366 struct comedi_subdevice *s,
367 struct comedi_insn *insn,
368 unsigned long context)
369{
370 unsigned int status;
371
372 status = inb(dev->iobase + DAS6402_STATUS_REG);
373 if (status & DAS6402_STATUS_FFNE)
374 return 0;
375 return -EBUSY;
376}
377
378static int das6402_ai_insn_read(struct comedi_device *dev,
379 struct comedi_subdevice *s,
380 struct comedi_insn *insn,
381 unsigned int *data)
382{
383 unsigned int chan = CR_CHAN(insn->chanspec);
384 unsigned int aref = CR_AREF(insn->chanspec);
385 int ret;
386 int i;
387
388 if (aref == AREF_DIFF && chan > (s->n_chan / 2))
389 return -EINVAL;
390
391
392 outb(DAS6402_CTRL_SOFT_TRIG, dev->iobase + DAS6402_CTRL_REG);
393
394 das6402_ai_set_mode(dev, s, insn->chanspec, DAS6402_MODE_POLLED);
395
396
397 outw(DAS6402_AI_MUX_HI(chan) | DAS6402_AI_MUX_LO(chan),
398 dev->iobase + DAS6402_AI_MUX_REG);
399
400 for (i = 0; i < insn->n; i++) {
401 das6402_ai_clear_eoc(dev);
402 das6402_ai_soft_trig(dev);
403
404 ret = comedi_timeout(dev, s, insn, das6402_ai_eoc, 0);
405 if (ret)
406 break;
407
408 data[i] = das6402_ai_read_sample(dev, s);
409 }
410
411 das6402_ai_clear_eoc(dev);
412
413 return insn->n;
414}
415
416static int das6402_ao_insn_write(struct comedi_device *dev,
417 struct comedi_subdevice *s,
418 struct comedi_insn *insn,
419 unsigned int *data)
420{
421 struct das6402_private *devpriv = dev->private;
422 unsigned int chan = CR_CHAN(insn->chanspec);
423 unsigned int range = CR_RANGE(insn->chanspec);
424 unsigned int val;
425 int i;
426
427
428 val = devpriv->ao_range;
429 val &= ~DAS6402_AO_RANGE_MASK(chan);
430 val |= DAS6402_AO_RANGE(chan, range);
431 if (val != devpriv->ao_range) {
432 devpriv->ao_range = val;
433 outb(val, dev->iobase + DAS6402_TRIG_REG);
434 }
435
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437
438
439
440
441
442
443
444
445
446
447
448 for (i = 0; i < insn->n; i++) {
449 val = data[i];
450
451 s->readback[chan] = val;
452
453 if (s->maxdata == 0x0fff) {
454
455
456
457
458
459 val <<= 4;
460 outw(val, dev->iobase + DAS6402_AO_DATA_REG(chan));
461 } else {
462
463
464
465
466 outb(val & 0xff,
467 dev->iobase + DAS6402_AO_LSB_REG(chan));
468 outb((val >> 8) & 0xff,
469 dev->iobase + DAS6402_AO_LSB_REG(chan));
470 }
471 }
472
473 return insn->n;
474}
475
476static int das6402_ao_insn_read(struct comedi_device *dev,
477 struct comedi_subdevice *s,
478 struct comedi_insn *insn,
479 unsigned int *data)
480{
481 unsigned int chan = CR_CHAN(insn->chanspec);
482
483
484
485
486
487 inw(dev->iobase + DAS6402_AO_LSB_REG(chan));
488
489 return comedi_readback_insn_read(dev, s, insn, data);
490}
491
492static int das6402_di_insn_bits(struct comedi_device *dev,
493 struct comedi_subdevice *s,
494 struct comedi_insn *insn,
495 unsigned int *data)
496{
497 data[1] = inb(dev->iobase + DAS6402_DI_DO_REG);
498
499 return insn->n;
500}
501
502static int das6402_do_insn_bits(struct comedi_device *dev,
503 struct comedi_subdevice *s,
504 struct comedi_insn *insn,
505 unsigned int *data)
506{
507 if (comedi_dio_update_state(s, data))
508 outb(s->state, dev->iobase + DAS6402_DI_DO_REG);
509
510 data[1] = s->state;
511
512 return insn->n;
513}
514
515static void das6402_reset(struct comedi_device *dev)
516{
517 struct das6402_private *devpriv = dev->private;
518
519
520 outb(DAS6402_MODE_ENHANCED, dev->iobase + DAS6402_MODE_REG);
521
522
523 das6402_set_extended(dev, DAS6402_STATUS_W_10MHZ);
524
525
526 outb(DAS6402_CTRL_SOFT_TRIG, dev->iobase + DAS6402_CTRL_REG);
527
528
529 das6402_set_mode(dev, DAS6402_MODE_RANGE(0) |
530 DAS6402_MODE_POLLED |
531 DAS6402_MODE_SE |
532 DAS6402_MODE_UNI);
533
534
535 outw(DAS6402_AI_MUX_HI(0) | DAS6402_AI_MUX_LO(0),
536 dev->iobase + DAS6402_AI_MUX_REG);
537
538
539 devpriv->ao_range = DAS6402_AO_RANGE(0, 2) | DAS6402_AO_RANGE(1, 2);
540 outb(devpriv->ao_range, dev->iobase + DAS6402_TRIG_REG);
541
542
543 outw(0, dev->iobase + DAS6402_AO_DATA_REG(0));
544 outw(0, dev->iobase + DAS6402_AO_DATA_REG(0));
545 inw(dev->iobase + DAS6402_AO_LSB_REG(0));
546
547
548 outb(0, dev->iobase + DAS6402_DI_DO_REG);
549
550 das6402_clear_all_interrupts(dev);
551}
552
553static int das6402_attach(struct comedi_device *dev,
554 struct comedi_devconfig *it)
555{
556 const struct das6402_boardinfo *board = dev->board_ptr;
557 struct das6402_private *devpriv;
558 struct comedi_subdevice *s;
559 int ret;
560
561 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
562 if (!devpriv)
563 return -ENOMEM;
564
565 ret = comedi_request_region(dev, it->options[0], 0x10);
566 if (ret)
567 return ret;
568
569 das6402_reset(dev);
570
571
572 if ((1 << it->options[1]) & 0x8cec) {
573 ret = request_irq(it->options[1], das6402_interrupt, 0,
574 dev->board_name, dev);
575 if (ret == 0) {
576 dev->irq = it->options[1];
577
578 switch (dev->irq) {
579 case 10:
580 devpriv->irq = 4;
581 break;
582 case 11:
583 devpriv->irq = 1;
584 break;
585 case 15:
586 devpriv->irq = 6;
587 break;
588 default:
589 devpriv->irq = dev->irq;
590 break;
591 }
592 }
593 }
594
595 dev->pacer = comedi_8254_init(dev->iobase + DAS6402_TIMER_BASE,
596 I8254_OSC_BASE_10MHZ, I8254_IO8, 0);
597 if (!dev->pacer)
598 return -ENOMEM;
599
600 ret = comedi_alloc_subdevices(dev, 4);
601 if (ret)
602 return ret;
603
604
605 s = &dev->subdevices[0];
606 s->type = COMEDI_SUBD_AI;
607 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
608 s->n_chan = 64;
609 s->maxdata = board->maxdata;
610 s->range_table = &das6402_ai_ranges;
611 s->insn_read = das6402_ai_insn_read;
612 if (dev->irq) {
613 dev->read_subdev = s;
614 s->subdev_flags |= SDF_CMD_READ;
615 s->len_chanlist = s->n_chan;
616 s->do_cmdtest = das6402_ai_cmdtest;
617 s->do_cmd = das6402_ai_cmd;
618 s->cancel = das6402_ai_cancel;
619 }
620
621
622 s = &dev->subdevices[1];
623 s->type = COMEDI_SUBD_AO;
624 s->subdev_flags = SDF_WRITABLE;
625 s->n_chan = 2;
626 s->maxdata = board->maxdata;
627 s->range_table = &das6402_ao_ranges;
628 s->insn_write = das6402_ao_insn_write;
629 s->insn_read = das6402_ao_insn_read;
630
631 ret = comedi_alloc_subdev_readback(s);
632 if (ret)
633 return ret;
634
635
636 s = &dev->subdevices[2];
637 s->type = COMEDI_SUBD_DI;
638 s->subdev_flags = SDF_READABLE;
639 s->n_chan = 8;
640 s->maxdata = 1;
641 s->range_table = &range_digital;
642 s->insn_bits = das6402_di_insn_bits;
643
644
645 s = &dev->subdevices[3];
646 s->type = COMEDI_SUBD_DO;
647 s->subdev_flags = SDF_WRITABLE;
648 s->n_chan = 8;
649 s->maxdata = 1;
650 s->range_table = &range_digital;
651 s->insn_bits = das6402_do_insn_bits;
652
653 return 0;
654}
655
656static struct comedi_driver das6402_driver = {
657 .driver_name = "das6402",
658 .module = THIS_MODULE,
659 .attach = das6402_attach,
660 .detach = comedi_legacy_detach,
661 .board_name = &das6402_boards[0].name,
662 .num_names = ARRAY_SIZE(das6402_boards),
663 .offset = sizeof(struct das6402_boardinfo),
664};
665module_comedi_driver(das6402_driver)
666
667MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>");
668MODULE_DESCRIPTION("Comedi driver for DAS6402 compatible boards");
669MODULE_LICENSE("GPL");
670
