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49#include <linux/module.h>
50#include <linux/delay.h>
51#include <linux/gfp.h>
52#include <linux/interrupt.h>
53#include <linux/io.h>
54
55#include "../comedidev.h"
56
57#include "comedi_isadma.h"
58
59
60
61
62#define DT2821_ADCSR_REG 0x00
63#define DT2821_ADCSR_ADERR BIT(15)
64#define DT2821_ADCSR_ADCLK BIT(9)
65#define DT2821_ADCSR_MUXBUSY BIT(8)
66#define DT2821_ADCSR_ADDONE BIT(7)
67#define DT2821_ADCSR_IADDONE BIT(6)
68#define DT2821_ADCSR_GS(x) (((x) & 0x3) << 4)
69#define DT2821_ADCSR_CHAN(x) (((x) & 0xf) << 0)
70#define DT2821_CHANCSR_REG 0x02
71#define DT2821_CHANCSR_LLE BIT(15)
72#define DT2821_CHANCSR_TO_PRESLA(x) (((x) >> 8) & 0xf)
73#define DT2821_CHANCSR_NUMB(x) ((((x) - 1) & 0xf) << 0)
74#define DT2821_ADDAT_REG 0x04
75#define DT2821_DACSR_REG 0x06
76#define DT2821_DACSR_DAERR BIT(15)
77#define DT2821_DACSR_YSEL(x) ((x) << 9)
78#define DT2821_DACSR_SSEL BIT(8)
79#define DT2821_DACSR_DACRDY BIT(7)
80#define DT2821_DACSR_IDARDY BIT(6)
81#define DT2821_DACSR_DACLK BIT(5)
82#define DT2821_DACSR_HBOE BIT(1)
83#define DT2821_DACSR_LBOE BIT(0)
84#define DT2821_DADAT_REG 0x08
85#define DT2821_DIODAT_REG 0x0a
86#define DT2821_SUPCSR_REG 0x0c
87#define DT2821_SUPCSR_DMAD BIT(15)
88#define DT2821_SUPCSR_ERRINTEN BIT(14)
89#define DT2821_SUPCSR_CLRDMADNE BIT(13)
90#define DT2821_SUPCSR_DDMA BIT(12)
91#define DT2821_SUPCSR_DS(x) (((x) & 0x3) << 10)
92#define DT2821_SUPCSR_DS_PIO DT2821_SUPCSR_DS(0)
93#define DT2821_SUPCSR_DS_AD_CLK DT2821_SUPCSR_DS(1)
94#define DT2821_SUPCSR_DS_DA_CLK DT2821_SUPCSR_DS(2)
95#define DT2821_SUPCSR_DS_AD_TRIG DT2821_SUPCSR_DS(3)
96#define DT2821_SUPCSR_BUFFB BIT(9)
97#define DT2821_SUPCSR_SCDN BIT(8)
98#define DT2821_SUPCSR_DACON BIT(7)
99#define DT2821_SUPCSR_ADCINIT BIT(6)
100#define DT2821_SUPCSR_DACINIT BIT(5)
101#define DT2821_SUPCSR_PRLD BIT(4)
102#define DT2821_SUPCSR_STRIG BIT(3)
103#define DT2821_SUPCSR_XTRIG BIT(2)
104#define DT2821_SUPCSR_XCLK BIT(1)
105#define DT2821_SUPCSR_BDINIT BIT(0)
106#define DT2821_TMRCTR_REG 0x0e
107#define DT2821_TMRCTR_PRESCALE(x) (((x) & 0xf) << 8)
108#define DT2821_TMRCTR_DIVIDER(x) ((255 - ((x) & 0xff)) << 0)
109
110
111#define DT2821_OSC_BASE 250
112#define DT2821_PRESCALE(x) BIT(x)
113#define DT2821_PRESCALE_MAX 15
114#define DT2821_DIVIDER_MAX 255
115#define DT2821_OSC_MAX (DT2821_OSC_BASE * \
116 DT2821_PRESCALE(DT2821_PRESCALE_MAX) * \
117 DT2821_DIVIDER_MAX)
118
119static const struct comedi_lrange range_dt282x_ai_lo_bipolar = {
120 4, {
121 BIP_RANGE(10),
122 BIP_RANGE(5),
123 BIP_RANGE(2.5),
124 BIP_RANGE(1.25)
125 }
126};
127
128static const struct comedi_lrange range_dt282x_ai_lo_unipolar = {
129 4, {
130 UNI_RANGE(10),
131 UNI_RANGE(5),
132 UNI_RANGE(2.5),
133 UNI_RANGE(1.25)
134 }
135};
136
137static const struct comedi_lrange range_dt282x_ai_5_bipolar = {
138 4, {
139 BIP_RANGE(5),
140 BIP_RANGE(2.5),
141 BIP_RANGE(1.25),
142 BIP_RANGE(0.625)
143 }
144};
145
146static const struct comedi_lrange range_dt282x_ai_5_unipolar = {
147 4, {
148 UNI_RANGE(5),
149 UNI_RANGE(2.5),
150 UNI_RANGE(1.25),
151 UNI_RANGE(0.625)
152 }
153};
154
155static const struct comedi_lrange range_dt282x_ai_hi_bipolar = {
156 4, {
157 BIP_RANGE(10),
158 BIP_RANGE(1),
159 BIP_RANGE(0.1),
160 BIP_RANGE(0.02)
161 }
162};
163
164static const struct comedi_lrange range_dt282x_ai_hi_unipolar = {
165 4, {
166 UNI_RANGE(10),
167 UNI_RANGE(1),
168 UNI_RANGE(0.1),
169 UNI_RANGE(0.02)
170 }
171};
172
173
174
175
176
177
178static const struct comedi_lrange dt282x_ao_range = {
179 5, {
180 BIP_RANGE(10),
181 BIP_RANGE(5),
182 BIP_RANGE(2.5),
183 UNI_RANGE(10),
184 UNI_RANGE(5),
185 }
186};
187
188struct dt282x_board {
189 const char *name;
190 unsigned int ai_maxdata;
191 int adchan_se;
192 int adchan_di;
193 int ai_speed;
194 int ispgl;
195 int dachan;
196 unsigned int ao_maxdata;
197};
198
199static const struct dt282x_board boardtypes[] = {
200 {
201 .name = "dt2821",
202 .ai_maxdata = 0x0fff,
203 .adchan_se = 16,
204 .adchan_di = 8,
205 .ai_speed = 20000,
206 .dachan = 2,
207 .ao_maxdata = 0x0fff,
208 }, {
209 .name = "dt2821-f",
210 .ai_maxdata = 0x0fff,
211 .adchan_se = 16,
212 .adchan_di = 8,
213 .ai_speed = 6500,
214 .dachan = 2,
215 .ao_maxdata = 0x0fff,
216 }, {
217 .name = "dt2821-g",
218 .ai_maxdata = 0x0fff,
219 .adchan_se = 16,
220 .adchan_di = 8,
221 .ai_speed = 4000,
222 .dachan = 2,
223 .ao_maxdata = 0x0fff,
224 }, {
225 .name = "dt2823",
226 .ai_maxdata = 0xffff,
227 .adchan_di = 4,
228 .ai_speed = 10000,
229 .dachan = 2,
230 .ao_maxdata = 0xffff,
231 }, {
232 .name = "dt2824-pgh",
233 .ai_maxdata = 0x0fff,
234 .adchan_se = 16,
235 .adchan_di = 8,
236 .ai_speed = 20000,
237 }, {
238 .name = "dt2824-pgl",
239 .ai_maxdata = 0x0fff,
240 .adchan_se = 16,
241 .adchan_di = 8,
242 .ai_speed = 20000,
243 .ispgl = 1,
244 }, {
245 .name = "dt2825",
246 .ai_maxdata = 0x0fff,
247 .adchan_se = 16,
248 .adchan_di = 8,
249 .ai_speed = 20000,
250 .ispgl = 1,
251 .dachan = 2,
252 .ao_maxdata = 0x0fff,
253 }, {
254 .name = "dt2827",
255 .ai_maxdata = 0xffff,
256 .adchan_di = 4,
257 .ai_speed = 10000,
258 .dachan = 2,
259 .ao_maxdata = 0x0fff,
260 }, {
261 .name = "dt2828",
262 .ai_maxdata = 0x0fff,
263 .adchan_se = 4,
264 .ai_speed = 10000,
265 .dachan = 2,
266 .ao_maxdata = 0x0fff,
267 }, {
268 .name = "dt2829",
269 .ai_maxdata = 0xffff,
270 .adchan_se = 8,
271 .ai_speed = 33250,
272 .dachan = 2,
273 .ao_maxdata = 0xffff,
274 }, {
275 .name = "dt21-ez",
276 .ai_maxdata = 0x0fff,
277 .adchan_se = 16,
278 .adchan_di = 8,
279 .ai_speed = 10000,
280 .dachan = 2,
281 .ao_maxdata = 0x0fff,
282 }, {
283 .name = "dt23-ez",
284 .ai_maxdata = 0xffff,
285 .adchan_se = 16,
286 .adchan_di = 8,
287 .ai_speed = 10000,
288 }, {
289 .name = "dt24-ez",
290 .ai_maxdata = 0x0fff,
291 .adchan_se = 16,
292 .adchan_di = 8,
293 .ai_speed = 10000,
294 }, {
295 .name = "dt24-ez-pgl",
296 .ai_maxdata = 0x0fff,
297 .adchan_se = 16,
298 .adchan_di = 8,
299 .ai_speed = 10000,
300 .ispgl = 1,
301 },
302};
303
304struct dt282x_private {
305 struct comedi_isadma *dma;
306 unsigned int ad_2scomp:1;
307 unsigned int divisor;
308 int dacsr;
309 int adcsr;
310 int supcsr;
311 int ntrig;
312 int nread;
313 int dma_dir;
314};
315
316static int dt282x_prep_ai_dma(struct comedi_device *dev, int dma_index, int n)
317{
318 struct dt282x_private *devpriv = dev->private;
319 struct comedi_isadma *dma = devpriv->dma;
320 struct comedi_isadma_desc *desc = &dma->desc[dma_index];
321
322 if (!devpriv->ntrig)
323 return 0;
324
325 if (n == 0)
326 n = desc->maxsize;
327 if (n > devpriv->ntrig * 2)
328 n = devpriv->ntrig * 2;
329 devpriv->ntrig -= n / 2;
330
331 desc->size = n;
332 comedi_isadma_set_mode(desc, devpriv->dma_dir);
333
334 comedi_isadma_program(desc);
335
336 return n;
337}
338
339static int dt282x_prep_ao_dma(struct comedi_device *dev, int dma_index, int n)
340{
341 struct dt282x_private *devpriv = dev->private;
342 struct comedi_isadma *dma = devpriv->dma;
343 struct comedi_isadma_desc *desc = &dma->desc[dma_index];
344
345 desc->size = n;
346 comedi_isadma_set_mode(desc, devpriv->dma_dir);
347
348 comedi_isadma_program(desc);
349
350 return n;
351}
352
353static void dt282x_disable_dma(struct comedi_device *dev)
354{
355 struct dt282x_private *devpriv = dev->private;
356 struct comedi_isadma *dma = devpriv->dma;
357 struct comedi_isadma_desc *desc;
358 int i;
359
360 for (i = 0; i < 2; i++) {
361 desc = &dma->desc[i];
362 comedi_isadma_disable(desc->chan);
363 }
364}
365
366static unsigned int dt282x_ns_to_timer(unsigned int *ns, unsigned int flags)
367{
368 unsigned int prescale, base, divider;
369
370 for (prescale = 0; prescale <= DT2821_PRESCALE_MAX; prescale++) {
371 if (prescale == 1)
372 continue;
373 base = DT2821_OSC_BASE * DT2821_PRESCALE(prescale);
374 switch (flags & CMDF_ROUND_MASK) {
375 case CMDF_ROUND_NEAREST:
376 default:
377 divider = DIV_ROUND_CLOSEST(*ns, base);
378 break;
379 case CMDF_ROUND_DOWN:
380 divider = (*ns) / base;
381 break;
382 case CMDF_ROUND_UP:
383 divider = DIV_ROUND_UP(*ns, base);
384 break;
385 }
386 if (divider <= DT2821_DIVIDER_MAX)
387 break;
388 }
389 if (divider > DT2821_DIVIDER_MAX) {
390 prescale = DT2821_PRESCALE_MAX;
391 divider = DT2821_DIVIDER_MAX;
392 base = DT2821_OSC_BASE * DT2821_PRESCALE(prescale);
393 }
394 *ns = divider * base;
395 return DT2821_TMRCTR_PRESCALE(prescale) |
396 DT2821_TMRCTR_DIVIDER(divider);
397}
398
399static void dt282x_munge(struct comedi_device *dev,
400 struct comedi_subdevice *s,
401 unsigned short *buf,
402 unsigned int nbytes)
403{
404 struct dt282x_private *devpriv = dev->private;
405 unsigned int val;
406 int i;
407
408 if (nbytes % 2)
409 dev_err(dev->class_dev,
410 "bug! odd number of bytes from dma xfer\n");
411
412 for (i = 0; i < nbytes / 2; i++) {
413 val = buf[i];
414 val &= s->maxdata;
415 if (devpriv->ad_2scomp)
416 val = comedi_offset_munge(s, val);
417
418 buf[i] = val;
419 }
420}
421
422static unsigned int dt282x_ao_setup_dma(struct comedi_device *dev,
423 struct comedi_subdevice *s,
424 int cur_dma)
425{
426 struct dt282x_private *devpriv = dev->private;
427 struct comedi_isadma *dma = devpriv->dma;
428 struct comedi_isadma_desc *desc = &dma->desc[cur_dma];
429 unsigned int nsamples = comedi_bytes_to_samples(s, desc->maxsize);
430 unsigned int nbytes;
431
432 nbytes = comedi_buf_read_samples(s, desc->virt_addr, nsamples);
433 if (nbytes)
434 dt282x_prep_ao_dma(dev, cur_dma, nbytes);
435 else
436 dev_err(dev->class_dev, "AO underrun\n");
437
438 return nbytes;
439}
440
441static void dt282x_ao_dma_interrupt(struct comedi_device *dev,
442 struct comedi_subdevice *s)
443{
444 struct dt282x_private *devpriv = dev->private;
445 struct comedi_isadma *dma = devpriv->dma;
446 struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
447
448 outw(devpriv->supcsr | DT2821_SUPCSR_CLRDMADNE,
449 dev->iobase + DT2821_SUPCSR_REG);
450
451 comedi_isadma_disable(desc->chan);
452
453 if (!dt282x_ao_setup_dma(dev, s, dma->cur_dma))
454 s->async->events |= COMEDI_CB_OVERFLOW;
455
456 dma->cur_dma = 1 - dma->cur_dma;
457}
458
459static void dt282x_ai_dma_interrupt(struct comedi_device *dev,
460 struct comedi_subdevice *s)
461{
462 struct dt282x_private *devpriv = dev->private;
463 struct comedi_isadma *dma = devpriv->dma;
464 struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
465 unsigned int nsamples = comedi_bytes_to_samples(s, desc->size);
466 int ret;
467
468 outw(devpriv->supcsr | DT2821_SUPCSR_CLRDMADNE,
469 dev->iobase + DT2821_SUPCSR_REG);
470
471 comedi_isadma_disable(desc->chan);
472
473 dt282x_munge(dev, s, desc->virt_addr, desc->size);
474 ret = comedi_buf_write_samples(s, desc->virt_addr, nsamples);
475 if (ret != desc->size)
476 return;
477
478 devpriv->nread -= nsamples;
479 if (devpriv->nread < 0) {
480 dev_info(dev->class_dev, "nread off by one\n");
481 devpriv->nread = 0;
482 }
483 if (!devpriv->nread) {
484 s->async->events |= COMEDI_CB_EOA;
485 return;
486 }
487
488
489 dt282x_prep_ai_dma(dev, dma->cur_dma, 0);
490
491 dma->cur_dma = 1 - dma->cur_dma;
492}
493
494static irqreturn_t dt282x_interrupt(int irq, void *d)
495{
496 struct comedi_device *dev = d;
497 struct dt282x_private *devpriv = dev->private;
498 struct comedi_subdevice *s = dev->read_subdev;
499 struct comedi_subdevice *s_ao = dev->write_subdev;
500 unsigned int supcsr, adcsr, dacsr;
501 int handled = 0;
502
503 if (!dev->attached) {
504 dev_err(dev->class_dev, "spurious interrupt\n");
505 return IRQ_HANDLED;
506 }
507
508 adcsr = inw(dev->iobase + DT2821_ADCSR_REG);
509 dacsr = inw(dev->iobase + DT2821_DACSR_REG);
510 supcsr = inw(dev->iobase + DT2821_SUPCSR_REG);
511 if (supcsr & DT2821_SUPCSR_DMAD) {
512 if (devpriv->dma_dir == COMEDI_ISADMA_READ)
513 dt282x_ai_dma_interrupt(dev, s);
514 else
515 dt282x_ao_dma_interrupt(dev, s_ao);
516 handled = 1;
517 }
518 if (adcsr & DT2821_ADCSR_ADERR) {
519 if (devpriv->nread != 0) {
520 dev_err(dev->class_dev, "A/D error\n");
521 s->async->events |= COMEDI_CB_ERROR;
522 }
523 handled = 1;
524 }
525 if (dacsr & DT2821_DACSR_DAERR) {
526 dev_err(dev->class_dev, "D/A error\n");
527 s_ao->async->events |= COMEDI_CB_ERROR;
528 handled = 1;
529 }
530
531 comedi_handle_events(dev, s);
532 if (s_ao)
533 comedi_handle_events(dev, s_ao);
534
535 return IRQ_RETVAL(handled);
536}
537
538static void dt282x_load_changain(struct comedi_device *dev, int n,
539 unsigned int *chanlist)
540{
541 struct dt282x_private *devpriv = dev->private;
542 int i;
543
544 outw(DT2821_CHANCSR_LLE | DT2821_CHANCSR_NUMB(n),
545 dev->iobase + DT2821_CHANCSR_REG);
546 for (i = 0; i < n; i++) {
547 unsigned int chan = CR_CHAN(chanlist[i]);
548 unsigned int range = CR_RANGE(chanlist[i]);
549
550 outw(devpriv->adcsr |
551 DT2821_ADCSR_GS(range) |
552 DT2821_ADCSR_CHAN(chan),
553 dev->iobase + DT2821_ADCSR_REG);
554 }
555 outw(DT2821_CHANCSR_NUMB(n), dev->iobase + DT2821_CHANCSR_REG);
556}
557
558static int dt282x_ai_timeout(struct comedi_device *dev,
559 struct comedi_subdevice *s,
560 struct comedi_insn *insn,
561 unsigned long context)
562{
563 unsigned int status;
564
565 status = inw(dev->iobase + DT2821_ADCSR_REG);
566 switch (context) {
567 case DT2821_ADCSR_MUXBUSY:
568 if ((status & DT2821_ADCSR_MUXBUSY) == 0)
569 return 0;
570 break;
571 case DT2821_ADCSR_ADDONE:
572 if (status & DT2821_ADCSR_ADDONE)
573 return 0;
574 break;
575 default:
576 return -EINVAL;
577 }
578 return -EBUSY;
579}
580
581
582
583
584
585
586
587static int dt282x_ai_insn_read(struct comedi_device *dev,
588 struct comedi_subdevice *s,
589 struct comedi_insn *insn,
590 unsigned int *data)
591{
592 struct dt282x_private *devpriv = dev->private;
593 unsigned int val;
594 int ret;
595 int i;
596
597
598 devpriv->adcsr = DT2821_ADCSR_ADCLK;
599 outw(devpriv->adcsr, dev->iobase + DT2821_ADCSR_REG);
600
601 dt282x_load_changain(dev, 1, &insn->chanspec);
602
603 outw(devpriv->supcsr | DT2821_SUPCSR_PRLD,
604 dev->iobase + DT2821_SUPCSR_REG);
605 ret = comedi_timeout(dev, s, insn,
606 dt282x_ai_timeout, DT2821_ADCSR_MUXBUSY);
607 if (ret)
608 return ret;
609
610 for (i = 0; i < insn->n; i++) {
611 outw(devpriv->supcsr | DT2821_SUPCSR_STRIG,
612 dev->iobase + DT2821_SUPCSR_REG);
613
614 ret = comedi_timeout(dev, s, insn,
615 dt282x_ai_timeout, DT2821_ADCSR_ADDONE);
616 if (ret)
617 return ret;
618
619 val = inw(dev->iobase + DT2821_ADDAT_REG);
620 val &= s->maxdata;
621 if (devpriv->ad_2scomp)
622 val = comedi_offset_munge(s, val);
623
624 data[i] = val;
625 }
626
627 return i;
628}
629
630static int dt282x_ai_cmdtest(struct comedi_device *dev,
631 struct comedi_subdevice *s,
632 struct comedi_cmd *cmd)
633{
634 const struct dt282x_board *board = dev->board_ptr;
635 struct dt282x_private *devpriv = dev->private;
636 int err = 0;
637 unsigned int arg;
638
639
640
641 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
642 err |= comedi_check_trigger_src(&cmd->scan_begin_src,
643 TRIG_FOLLOW | TRIG_EXT);
644 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_TIMER);
645 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
646 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
647
648 if (err)
649 return 1;
650
651
652
653 err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
654 err |= comedi_check_trigger_is_unique(cmd->stop_src);
655
656
657
658 if (err)
659 return 2;
660
661
662
663 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
664 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
665 err |= comedi_check_trigger_arg_max(&cmd->convert_arg, DT2821_OSC_MAX);
666 err |= comedi_check_trigger_arg_min(&cmd->convert_arg, board->ai_speed);
667 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
668 cmd->chanlist_len);
669
670 if (cmd->stop_src == TRIG_COUNT)
671 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
672 else
673 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
674
675 if (err)
676 return 3;
677
678
679
680 arg = cmd->convert_arg;
681 devpriv->divisor = dt282x_ns_to_timer(&arg, cmd->flags);
682 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
683
684 if (err)
685 return 4;
686
687 return 0;
688}
689
690static int dt282x_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
691{
692 struct dt282x_private *devpriv = dev->private;
693 struct comedi_isadma *dma = devpriv->dma;
694 struct comedi_cmd *cmd = &s->async->cmd;
695 int ret;
696
697 dt282x_disable_dma(dev);
698
699 outw(devpriv->divisor, dev->iobase + DT2821_TMRCTR_REG);
700
701 devpriv->supcsr = DT2821_SUPCSR_ERRINTEN;
702 if (cmd->scan_begin_src == TRIG_FOLLOW)
703 devpriv->supcsr = DT2821_SUPCSR_DS_AD_CLK;
704 else
705 devpriv->supcsr = DT2821_SUPCSR_DS_AD_TRIG;
706 outw(devpriv->supcsr |
707 DT2821_SUPCSR_CLRDMADNE |
708 DT2821_SUPCSR_BUFFB |
709 DT2821_SUPCSR_ADCINIT,
710 dev->iobase + DT2821_SUPCSR_REG);
711
712 devpriv->ntrig = cmd->stop_arg * cmd->scan_end_arg;
713 devpriv->nread = devpriv->ntrig;
714
715 devpriv->dma_dir = COMEDI_ISADMA_READ;
716 dma->cur_dma = 0;
717 dt282x_prep_ai_dma(dev, 0, 0);
718 if (devpriv->ntrig) {
719 dt282x_prep_ai_dma(dev, 1, 0);
720 devpriv->supcsr |= DT2821_SUPCSR_DDMA;
721 outw(devpriv->supcsr, dev->iobase + DT2821_SUPCSR_REG);
722 }
723
724 devpriv->adcsr = 0;
725
726 dt282x_load_changain(dev, cmd->chanlist_len, cmd->chanlist);
727
728 devpriv->adcsr = DT2821_ADCSR_ADCLK | DT2821_ADCSR_IADDONE;
729 outw(devpriv->adcsr, dev->iobase + DT2821_ADCSR_REG);
730
731 outw(devpriv->supcsr | DT2821_SUPCSR_PRLD,
732 dev->iobase + DT2821_SUPCSR_REG);
733 ret = comedi_timeout(dev, s, NULL,
734 dt282x_ai_timeout, DT2821_ADCSR_MUXBUSY);
735 if (ret)
736 return ret;
737
738 if (cmd->scan_begin_src == TRIG_FOLLOW) {
739 outw(devpriv->supcsr | DT2821_SUPCSR_STRIG,
740 dev->iobase + DT2821_SUPCSR_REG);
741 } else {
742 devpriv->supcsr |= DT2821_SUPCSR_XTRIG;
743 outw(devpriv->supcsr, dev->iobase + DT2821_SUPCSR_REG);
744 }
745
746 return 0;
747}
748
749static int dt282x_ai_cancel(struct comedi_device *dev,
750 struct comedi_subdevice *s)
751{
752 struct dt282x_private *devpriv = dev->private;
753
754 dt282x_disable_dma(dev);
755
756 devpriv->adcsr = 0;
757 outw(devpriv->adcsr, dev->iobase + DT2821_ADCSR_REG);
758
759 devpriv->supcsr = 0;
760 outw(devpriv->supcsr | DT2821_SUPCSR_ADCINIT,
761 dev->iobase + DT2821_SUPCSR_REG);
762
763 return 0;
764}
765
766static int dt282x_ao_insn_write(struct comedi_device *dev,
767 struct comedi_subdevice *s,
768 struct comedi_insn *insn,
769 unsigned int *data)
770{
771 struct dt282x_private *devpriv = dev->private;
772 unsigned int chan = CR_CHAN(insn->chanspec);
773 unsigned int range = CR_RANGE(insn->chanspec);
774 int i;
775
776 devpriv->dacsr |= DT2821_DACSR_SSEL | DT2821_DACSR_YSEL(chan);
777
778 for (i = 0; i < insn->n; i++) {
779 unsigned int val = data[i];
780
781 s->readback[chan] = val;
782
783 if (comedi_range_is_bipolar(s, range))
784 val = comedi_offset_munge(s, val);
785
786 outw(devpriv->dacsr, dev->iobase + DT2821_DACSR_REG);
787
788 outw(val, dev->iobase + DT2821_DADAT_REG);
789
790 outw(devpriv->supcsr | DT2821_SUPCSR_DACON,
791 dev->iobase + DT2821_SUPCSR_REG);
792 }
793
794 return insn->n;
795}
796
797static int dt282x_ao_cmdtest(struct comedi_device *dev,
798 struct comedi_subdevice *s,
799 struct comedi_cmd *cmd)
800{
801 struct dt282x_private *devpriv = dev->private;
802 int err = 0;
803 unsigned int arg;
804
805
806
807 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_INT);
808 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
809 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
810 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
811 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
812
813 if (err)
814 return 1;
815
816
817
818 err |= comedi_check_trigger_is_unique(cmd->stop_src);
819
820
821
822 if (err)
823 return 2;
824
825
826
827 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
828 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg, 5000);
829 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
830 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
831 cmd->chanlist_len);
832
833 if (cmd->stop_src == TRIG_COUNT)
834 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
835 else
836 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
837
838 if (err)
839 return 3;
840
841
842
843 arg = cmd->scan_begin_arg;
844 devpriv->divisor = dt282x_ns_to_timer(&arg, cmd->flags);
845 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
846
847 if (err)
848 return 4;
849
850 return 0;
851}
852
853static int dt282x_ao_inttrig(struct comedi_device *dev,
854 struct comedi_subdevice *s,
855 unsigned int trig_num)
856{
857 struct dt282x_private *devpriv = dev->private;
858 struct comedi_cmd *cmd = &s->async->cmd;
859
860 if (trig_num != cmd->start_src)
861 return -EINVAL;
862
863 if (!dt282x_ao_setup_dma(dev, s, 0))
864 return -EPIPE;
865
866 if (!dt282x_ao_setup_dma(dev, s, 1))
867 return -EPIPE;
868
869 outw(devpriv->supcsr | DT2821_SUPCSR_STRIG,
870 dev->iobase + DT2821_SUPCSR_REG);
871 s->async->inttrig = NULL;
872
873 return 1;
874}
875
876static int dt282x_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
877{
878 struct dt282x_private *devpriv = dev->private;
879 struct comedi_isadma *dma = devpriv->dma;
880 struct comedi_cmd *cmd = &s->async->cmd;
881
882 dt282x_disable_dma(dev);
883
884 devpriv->supcsr = DT2821_SUPCSR_ERRINTEN |
885 DT2821_SUPCSR_DS_DA_CLK |
886 DT2821_SUPCSR_DDMA;
887 outw(devpriv->supcsr |
888 DT2821_SUPCSR_CLRDMADNE |
889 DT2821_SUPCSR_BUFFB |
890 DT2821_SUPCSR_DACINIT,
891 dev->iobase + DT2821_SUPCSR_REG);
892
893 devpriv->ntrig = cmd->stop_arg * cmd->chanlist_len;
894 devpriv->nread = devpriv->ntrig;
895
896 devpriv->dma_dir = COMEDI_ISADMA_WRITE;
897 dma->cur_dma = 0;
898
899 outw(devpriv->divisor, dev->iobase + DT2821_TMRCTR_REG);
900
901
902 devpriv->dacsr &= (DT2821_DACSR_LBOE | DT2821_DACSR_HBOE);
903
904 devpriv->dacsr |= (DT2821_DACSR_SSEL |
905 DT2821_DACSR_DACLK |
906 DT2821_DACSR_IDARDY);
907 outw(devpriv->dacsr, dev->iobase + DT2821_DACSR_REG);
908
909 s->async->inttrig = dt282x_ao_inttrig;
910
911 return 0;
912}
913
914static int dt282x_ao_cancel(struct comedi_device *dev,
915 struct comedi_subdevice *s)
916{
917 struct dt282x_private *devpriv = dev->private;
918
919 dt282x_disable_dma(dev);
920
921
922 devpriv->dacsr &= (DT2821_DACSR_LBOE | DT2821_DACSR_HBOE);
923
924 outw(devpriv->dacsr, dev->iobase + DT2821_DACSR_REG);
925
926 devpriv->supcsr = 0;
927 outw(devpriv->supcsr | DT2821_SUPCSR_DACINIT,
928 dev->iobase + DT2821_SUPCSR_REG);
929
930 return 0;
931}
932
933static int dt282x_dio_insn_bits(struct comedi_device *dev,
934 struct comedi_subdevice *s,
935 struct comedi_insn *insn,
936 unsigned int *data)
937{
938 if (comedi_dio_update_state(s, data))
939 outw(s->state, dev->iobase + DT2821_DIODAT_REG);
940
941 data[1] = inw(dev->iobase + DT2821_DIODAT_REG);
942
943 return insn->n;
944}
945
946static int dt282x_dio_insn_config(struct comedi_device *dev,
947 struct comedi_subdevice *s,
948 struct comedi_insn *insn,
949 unsigned int *data)
950{
951 struct dt282x_private *devpriv = dev->private;
952 unsigned int chan = CR_CHAN(insn->chanspec);
953 unsigned int mask;
954 int ret;
955
956 if (chan < 8)
957 mask = 0x00ff;
958 else
959 mask = 0xff00;
960
961 ret = comedi_dio_insn_config(dev, s, insn, data, mask);
962 if (ret)
963 return ret;
964
965 devpriv->dacsr &= ~(DT2821_DACSR_LBOE | DT2821_DACSR_HBOE);
966 if (s->io_bits & 0x00ff)
967 devpriv->dacsr |= DT2821_DACSR_LBOE;
968 if (s->io_bits & 0xff00)
969 devpriv->dacsr |= DT2821_DACSR_HBOE;
970
971 outw(devpriv->dacsr, dev->iobase + DT2821_DACSR_REG);
972
973 return insn->n;
974}
975
976static const struct comedi_lrange *const ai_range_table[] = {
977 &range_dt282x_ai_lo_bipolar,
978 &range_dt282x_ai_lo_unipolar,
979 &range_dt282x_ai_5_bipolar,
980 &range_dt282x_ai_5_unipolar
981};
982
983static const struct comedi_lrange *const ai_range_pgl_table[] = {
984 &range_dt282x_ai_hi_bipolar,
985 &range_dt282x_ai_hi_unipolar
986};
987
988static const struct comedi_lrange *opt_ai_range_lkup(int ispgl, int x)
989{
990 if (ispgl) {
991 if (x < 0 || x >= 2)
992 x = 0;
993 return ai_range_pgl_table[x];
994 }
995
996 if (x < 0 || x >= 4)
997 x = 0;
998 return ai_range_table[x];
999}
1000
1001static void dt282x_alloc_dma(struct comedi_device *dev,
1002 struct comedi_devconfig *it)
1003{
1004 struct dt282x_private *devpriv = dev->private;
1005 unsigned int irq_num = it->options[1];
1006 unsigned int dma_chan[2];
1007
1008 if (it->options[2] < it->options[3]) {
1009 dma_chan[0] = it->options[2];
1010 dma_chan[1] = it->options[3];
1011 } else {
1012 dma_chan[0] = it->options[3];
1013 dma_chan[1] = it->options[2];
1014 }
1015
1016 if (!irq_num || dma_chan[0] == dma_chan[1] ||
1017 dma_chan[0] < 5 || dma_chan[0] > 7 ||
1018 dma_chan[1] < 5 || dma_chan[1] > 7)
1019 return;
1020
1021 if (request_irq(irq_num, dt282x_interrupt, 0, dev->board_name, dev))
1022 return;
1023
1024
1025 devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan[0], dma_chan[1],
1026 PAGE_SIZE, 0);
1027 if (!devpriv->dma)
1028 free_irq(irq_num, dev);
1029 else
1030 dev->irq = irq_num;
1031}
1032
1033static void dt282x_free_dma(struct comedi_device *dev)
1034{
1035 struct dt282x_private *devpriv = dev->private;
1036
1037 if (devpriv)
1038 comedi_isadma_free(devpriv->dma);
1039}
1040
1041static int dt282x_initialize(struct comedi_device *dev)
1042{
1043
1044 outw(DT2821_SUPCSR_BDINIT, dev->iobase + DT2821_SUPCSR_REG);
1045 inw(dev->iobase + DT2821_ADCSR_REG);
1046
1047
1048
1049
1050
1051 if (((inw(dev->iobase + DT2821_ADCSR_REG) & 0xfff0) != 0x7c00) ||
1052 ((inw(dev->iobase + DT2821_CHANCSR_REG) & 0xf0f0) != 0x70f0) ||
1053 ((inw(dev->iobase + DT2821_DACSR_REG) & 0x7c93) != 0x7c90) ||
1054 ((inw(dev->iobase + DT2821_SUPCSR_REG) & 0xf8ff) != 0x0000) ||
1055 ((inw(dev->iobase + DT2821_TMRCTR_REG) & 0xff00) != 0xf000)) {
1056 dev_err(dev->class_dev, "board not found\n");
1057 return -EIO;
1058 }
1059 return 0;
1060}
1061
1062static int dt282x_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1063{
1064 const struct dt282x_board *board = dev->board_ptr;
1065 struct dt282x_private *devpriv;
1066 struct comedi_subdevice *s;
1067 int ret;
1068
1069 ret = comedi_request_region(dev, it->options[0], 0x10);
1070 if (ret)
1071 return ret;
1072
1073 ret = dt282x_initialize(dev);
1074 if (ret)
1075 return ret;
1076
1077 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1078 if (!devpriv)
1079 return -ENOMEM;
1080
1081
1082 dt282x_alloc_dma(dev, it);
1083
1084 ret = comedi_alloc_subdevices(dev, 3);
1085 if (ret)
1086 return ret;
1087
1088
1089 s = &dev->subdevices[0];
1090 s->type = COMEDI_SUBD_AI;
1091 s->subdev_flags = SDF_READABLE;
1092 if ((it->options[4] && board->adchan_di) || board->adchan_se == 0) {
1093 s->subdev_flags |= SDF_DIFF;
1094 s->n_chan = board->adchan_di;
1095 } else {
1096 s->subdev_flags |= SDF_COMMON;
1097 s->n_chan = board->adchan_se;
1098 }
1099 s->maxdata = board->ai_maxdata;
1100
1101 s->range_table = opt_ai_range_lkup(board->ispgl, it->options[8]);
1102 devpriv->ad_2scomp = it->options[5] ? 1 : 0;
1103
1104 s->insn_read = dt282x_ai_insn_read;
1105 if (dev->irq) {
1106 dev->read_subdev = s;
1107 s->subdev_flags |= SDF_CMD_READ;
1108 s->len_chanlist = s->n_chan;
1109 s->do_cmdtest = dt282x_ai_cmdtest;
1110 s->do_cmd = dt282x_ai_cmd;
1111 s->cancel = dt282x_ai_cancel;
1112 }
1113
1114
1115 s = &dev->subdevices[1];
1116 if (board->dachan) {
1117 s->type = COMEDI_SUBD_AO;
1118 s->subdev_flags = SDF_WRITABLE;
1119 s->n_chan = board->dachan;
1120 s->maxdata = board->ao_maxdata;
1121
1122 s->range_table = &dt282x_ao_range;
1123 s->insn_write = dt282x_ao_insn_write;
1124 if (dev->irq) {
1125 dev->write_subdev = s;
1126 s->subdev_flags |= SDF_CMD_WRITE;
1127 s->len_chanlist = s->n_chan;
1128 s->do_cmdtest = dt282x_ao_cmdtest;
1129 s->do_cmd = dt282x_ao_cmd;
1130 s->cancel = dt282x_ao_cancel;
1131 }
1132
1133 ret = comedi_alloc_subdev_readback(s);
1134 if (ret)
1135 return ret;
1136 } else {
1137 s->type = COMEDI_SUBD_UNUSED;
1138 }
1139
1140
1141 s = &dev->subdevices[2];
1142 s->type = COMEDI_SUBD_DIO;
1143 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
1144 s->n_chan = 16;
1145 s->maxdata = 1;
1146 s->range_table = &range_digital;
1147 s->insn_bits = dt282x_dio_insn_bits;
1148 s->insn_config = dt282x_dio_insn_config;
1149
1150 return 0;
1151}
1152
1153static void dt282x_detach(struct comedi_device *dev)
1154{
1155 dt282x_free_dma(dev);
1156 comedi_legacy_detach(dev);
1157}
1158
1159static struct comedi_driver dt282x_driver = {
1160 .driver_name = "dt282x",
1161 .module = THIS_MODULE,
1162 .attach = dt282x_attach,
1163 .detach = dt282x_detach,
1164 .board_name = &boardtypes[0].name,
1165 .num_names = ARRAY_SIZE(boardtypes),
1166 .offset = sizeof(struct dt282x_board),
1167};
1168module_comedi_driver(dt282x_driver);
1169
1170MODULE_AUTHOR("Comedi https://www.comedi.org");
1171MODULE_DESCRIPTION("Comedi driver for Data Translation DT2821 series");
1172MODULE_LICENSE("GPL");
1173
