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[mirror_ubuntu-bionic-kernel.git] / drivers / staging / comedi / drivers / dt2811.c
1 /*
2 comedi/drivers/dt2811.c
3 Hardware driver for Data Translation DT2811
4
5 COMEDI - Linux Control and Measurement Device Interface
6 History:
7 Base Version - David A. Schleef <ds@schleef.org>
8 December 1998 - Updated to work. David does not have a DT2811
9 board any longer so this was suffering from bitrot.
10 Updated performed by ...
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26 /*
27 Driver: dt2811
28 Description: Data Translation DT2811
29 Author: ds
30 Devices: [Data Translation] DT2811-PGL (dt2811-pgl), DT2811-PGH (dt2811-pgh)
31 Status: works
32
33 Configuration options:
34 [0] - I/O port base address
35 [1] - IRQ, although this is currently unused
36 [2] - A/D reference
37 0 = signle-ended
38 1 = differential
39 2 = pseudo-differential (common reference)
40 [3] - A/D range
41 0 = [-5, 5]
42 1 = [-2.5, 2.5]
43 2 = [0, 5]
44 [4] - D/A 0 range (same choices)
45 [4] - D/A 1 range (same choices)
46 */
47
48 #include <linux/interrupt.h>
49 #include "../comedidev.h"
50
51 #include <linux/ioport.h>
52
53 static const char *driver_name = "dt2811";
54
55 static const struct comedi_lrange range_dt2811_pgh_ai_5_unipolar = {
56 4, {
57 RANGE(0, 5),
58 RANGE(0, 2.5),
59 RANGE(0, 1.25),
60 RANGE(0, 0.625)
61 }
62 };
63
64 static const struct comedi_lrange range_dt2811_pgh_ai_2_5_bipolar = {
65 4, {
66 RANGE(-2.5, 2.5),
67 RANGE(-1.25, 1.25),
68 RANGE(-0.625, 0.625),
69 RANGE(-0.3125, 0.3125)
70 }
71 };
72
73 static const struct comedi_lrange range_dt2811_pgh_ai_5_bipolar = {
74 4, {
75 RANGE(-5, 5),
76 RANGE(-2.5, 2.5),
77 RANGE(-1.25, 1.25),
78 RANGE(-0.625, 0.625)
79 }
80 };
81
82 static const struct comedi_lrange range_dt2811_pgl_ai_5_unipolar = {
83 4, {
84 RANGE(0, 5),
85 RANGE(0, 0.5),
86 RANGE(0, 0.05),
87 RANGE(0, 0.01)
88 }
89 };
90
91 static const struct comedi_lrange range_dt2811_pgl_ai_2_5_bipolar = {
92 4, {
93 RANGE(-2.5, 2.5),
94 RANGE(-0.25, 0.25),
95 RANGE(-0.025, 0.025),
96 RANGE(-0.005, 0.005)
97 }
98 };
99
100 static const struct comedi_lrange range_dt2811_pgl_ai_5_bipolar = {
101 4, {
102 RANGE(-5, 5),
103 RANGE(-0.5, 0.5),
104 RANGE(-0.05, 0.05),
105 RANGE(-0.01, 0.01)
106 }
107 };
108
109 /*
110
111 0x00 ADCSR R/W A/D Control/Status Register
112 bit 7 - (R) 1 indicates A/D conversion done
113 reading ADDAT clears bit
114 (W) ignored
115 bit 6 - (R) 1 indicates A/D error
116 (W) ignored
117 bit 5 - (R) 1 indicates A/D busy, cleared at end
118 of conversion
119 (W) ignored
120 bit 4 - (R) 0
121 (W)
122 bit 3 - (R) 0
123 bit 2 - (R/W) 1 indicates interrupts enabled
124 bits 1,0 - (R/W) mode bits
125 00 single conversion on ADGCR load
126 01 continuous conversion, internal clock,
127 (clock enabled on ADGCR load)
128 10 continuous conversion, internal clock,
129 external trigger
130 11 continuous conversion, external clock,
131 external trigger
132
133 0x01 ADGCR R/W A/D Gain/Channel Register
134 bit 6,7 - (R/W) gain select
135 00 gain=1, both PGH, PGL models
136 01 gain=2 PGH, 10 PGL
137 10 gain=4 PGH, 100 PGL
138 11 gain=8 PGH, 500 PGL
139 bit 4,5 - reserved
140 bit 3-0 - (R/W) channel select
141 channel number from 0-15
142
143 0x02,0x03 (R) ADDAT A/D Data Register
144 (W) DADAT0 D/A Data Register 0
145 0x02 low byte
146 0x03 high byte
147
148 0x04,0x05 (W) DADAT0 D/A Data Register 1
149
150 0x06 (R) DIO0 Digital Input Port 0
151 (W) DIO1 Digital Output Port 1
152
153 0x07 TMRCTR (R/W) Timer/Counter Register
154 bits 6,7 - reserved
155 bits 5-3 - Timer frequency control (mantissa)
156 543 divisor freqency (kHz)
157 000 1 600
158 001 10 60
159 010 2 300
160 011 3 200
161 100 4 150
162 101 5 120
163 110 6 100
164 111 12 50
165 bits 2-0 - Timer frequency control (exponent)
166 210 multiply divisor/divide frequency by
167 000 1
168 001 10
169 010 100
170 011 1000
171 100 10000
172 101 100000
173 110 1000000
174 111 10000000
175
176 */
177
178 #define TIMEOUT 10000
179
180 #define DT2811_SIZE 8
181
182 #define DT2811_ADCSR 0
183 #define DT2811_ADGCR 1
184 #define DT2811_ADDATLO 2
185 #define DT2811_ADDATHI 3
186 #define DT2811_DADAT0LO 2
187 #define DT2811_DADAT0HI 3
188 #define DT2811_DADAT1LO 4
189 #define DT2811_DADAT1HI 5
190 #define DT2811_DIO 6
191 #define DT2811_TMRCTR 7
192
193 /*
194 * flags
195 */
196
197 /* ADCSR */
198
199 #define DT2811_ADDONE 0x80
200 #define DT2811_ADERROR 0x40
201 #define DT2811_ADBUSY 0x20
202 #define DT2811_CLRERROR 0x10
203 #define DT2811_INTENB 0x04
204 #define DT2811_ADMODE 0x03
205
206 struct dt2811_board {
207
208 const char *name;
209 const struct comedi_lrange *bip_5;
210 const struct comedi_lrange *bip_2_5;
211 const struct comedi_lrange *unip_5;
212 };
213
214 static const struct dt2811_board boardtypes[] = {
215 {"dt2811-pgh",
216 &range_dt2811_pgh_ai_5_bipolar,
217 &range_dt2811_pgh_ai_2_5_bipolar,
218 &range_dt2811_pgh_ai_5_unipolar,
219 },
220 {"dt2811-pgl",
221 &range_dt2811_pgl_ai_5_bipolar,
222 &range_dt2811_pgl_ai_2_5_bipolar,
223 &range_dt2811_pgl_ai_5_unipolar,
224 },
225 };
226
227 #define this_board ((const struct dt2811_board *)dev->board_ptr)
228
229 static int dt2811_attach(struct comedi_device *dev,
230 struct comedi_devconfig *it);
231 static int dt2811_detach(struct comedi_device *dev);
232 static struct comedi_driver driver_dt2811 = {
233 .driver_name = "dt2811",
234 .module = THIS_MODULE,
235 .attach = dt2811_attach,
236 .detach = dt2811_detach,
237 .board_name = &boardtypes[0].name,
238 .num_names = ARRAY_SIZE(boardtypes),
239 .offset = sizeof(struct dt2811_board),
240 };
241
242 static int __init driver_dt2811_init_module(void)
243 {
244 return comedi_driver_register(&driver_dt2811);
245 }
246
247 static void __exit driver_dt2811_cleanup_module(void)
248 {
249 comedi_driver_unregister(&driver_dt2811);
250 }
251
252 module_init(driver_dt2811_init_module);
253 module_exit(driver_dt2811_cleanup_module);
254
255 static int dt2811_ai_insn(struct comedi_device *dev, struct comedi_subdevice *s,
256 struct comedi_insn *insn, unsigned int *data);
257 static int dt2811_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
258 struct comedi_insn *insn, unsigned int *data);
259 static int dt2811_ao_insn_read(struct comedi_device *dev,
260 struct comedi_subdevice *s,
261 struct comedi_insn *insn, unsigned int *data);
262 static int dt2811_di_insn_bits(struct comedi_device *dev,
263 struct comedi_subdevice *s,
264 struct comedi_insn *insn, unsigned int *data);
265 static int dt2811_do_insn_bits(struct comedi_device *dev,
266 struct comedi_subdevice *s,
267 struct comedi_insn *insn, unsigned int *data);
268
269 enum { card_2811_pgh, card_2811_pgl };
270
271 struct dt2811_private {
272 int ntrig;
273 int curadchan;
274 enum {
275 adc_singleended, adc_diff, adc_pseudo_diff
276 } adc_mux;
277 enum {
278 dac_bipolar_5, dac_bipolar_2_5, dac_unipolar_5
279 } dac_range[2];
280 const struct comedi_lrange *range_type_list[2];
281 unsigned int ao_readback[2];
282 };
283
284 #define devpriv ((struct dt2811_private *)dev->private)
285
286 static const struct comedi_lrange *dac_range_types[] = {
287 &range_bipolar5,
288 &range_bipolar2_5,
289 &range_unipolar5
290 };
291
292 #define DT2811_TIMEOUT 5
293
294 #if 0
295 static irqreturn_t dt2811_interrupt(int irq, void *d)
296 {
297 int lo, hi;
298 int data;
299 struct comedi_device *dev = d;
300
301 if (!dev->attached) {
302 comedi_error(dev, "spurious interrupt");
303 return IRQ_HANDLED;
304 }
305
306 lo = inb(dev->iobase + DT2811_ADDATLO);
307 hi = inb(dev->iobase + DT2811_ADDATHI);
308
309 data = lo + (hi << 8);
310
311 if (!(--devpriv->ntrig)) {
312 /* how to turn off acquisition */
313 s->async->events |= COMEDI_SB_EOA;
314 }
315 comedi_event(dev, s);
316 return IRQ_HANDLED;
317 }
318 #endif
319
320 /*
321 options[0] Board base address
322 options[1] IRQ
323 options[2] Input configuration
324 0 == single-ended
325 1 == differential
326 2 == pseudo-differential
327 options[3] Analog input range configuration
328 0 == bipolar 5 (-5V -- +5V)
329 1 == bipolar 2.5V (-2.5V -- +2.5V)
330 2 == unipolar 5V (0V -- +5V)
331 options[4] Analog output 0 range configuration
332 0 == bipolar 5 (-5V -- +5V)
333 1 == bipolar 2.5V (-2.5V -- +2.5V)
334 2 == unipolar 5V (0V -- +5V)
335 options[5] Analog output 1 range configuration
336 0 == bipolar 5 (-5V -- +5V)
337 1 == bipolar 2.5V (-2.5V -- +2.5V)
338 2 == unipolar 5V (0V -- +5V)
339 */
340
341 static int dt2811_attach(struct comedi_device *dev, struct comedi_devconfig *it)
342 {
343 /* int i, irq; */
344 /* unsigned long irqs; */
345 /* long flags; */
346
347 int ret;
348 struct comedi_subdevice *s;
349 unsigned long iobase;
350
351 iobase = it->options[0];
352
353 printk(KERN_INFO "comedi%d: dt2811:base=0x%04lx\n", dev->minor, iobase);
354
355 if (!request_region(iobase, DT2811_SIZE, driver_name)) {
356 printk(KERN_ERR "I/O port conflict\n");
357 return -EIO;
358 }
359
360 dev->iobase = iobase;
361 dev->board_name = this_board->name;
362
363 #if 0
364 outb(0, dev->iobase + DT2811_ADCSR);
365 udelay(100);
366 i = inb(dev->iobase + DT2811_ADDATLO);
367 i = inb(dev->iobase + DT2811_ADDATHI);
368 #endif
369
370 #if 0
371 irq = it->options[1];
372 if (irq < 0) {
373 save_flags(flags);
374 sti();
375 irqs = probe_irq_on();
376
377 outb(DT2811_CLRERROR | DT2811_INTENB,
378 dev->iobase + DT2811_ADCSR);
379 outb(0, dev->iobase + DT2811_ADGCR);
380
381 udelay(100);
382
383 irq = probe_irq_off(irqs);
384 restore_flags(flags);
385
386 /*outb(DT2811_CLRERROR|DT2811_INTENB,
387 dev->iobase+DT2811_ADCSR);*/
388
389 if (inb(dev->iobase + DT2811_ADCSR) & DT2811_ADERROR)
390 printk(KERN_ERR "error probing irq (bad)\n");
391 dev->irq = 0;
392 if (irq > 0) {
393 i = inb(dev->iobase + DT2811_ADDATLO);
394 i = inb(dev->iobase + DT2811_ADDATHI);
395 printk(KERN_INFO "(irq = %d)\n", irq);
396 ret = request_irq(irq, dt2811_interrupt, 0,
397 driver_name, dev);
398 if (ret < 0)
399 return -EIO;
400 dev->irq = irq;
401 } else if (irq == 0) {
402 printk(KERN_INFO "(no irq)\n");
403 } else {
404 printk(KERN_ERR "( multiple irq's -- this is bad! )\n");
405 }
406 }
407 #endif
408
409 ret = alloc_subdevices(dev, 4);
410 if (ret < 0)
411 return ret;
412
413 ret = alloc_private(dev, sizeof(struct dt2811_private));
414 if (ret < 0)
415 return ret;
416
417 switch (it->options[2]) {
418 case 0:
419 devpriv->adc_mux = adc_singleended;
420 break;
421 case 1:
422 devpriv->adc_mux = adc_diff;
423 break;
424 case 2:
425 devpriv->adc_mux = adc_pseudo_diff;
426 break;
427 default:
428 devpriv->adc_mux = adc_singleended;
429 break;
430 }
431 switch (it->options[4]) {
432 case 0:
433 devpriv->dac_range[0] = dac_bipolar_5;
434 break;
435 case 1:
436 devpriv->dac_range[0] = dac_bipolar_2_5;
437 break;
438 case 2:
439 devpriv->dac_range[0] = dac_unipolar_5;
440 break;
441 default:
442 devpriv->dac_range[0] = dac_bipolar_5;
443 break;
444 }
445 switch (it->options[5]) {
446 case 0:
447 devpriv->dac_range[1] = dac_bipolar_5;
448 break;
449 case 1:
450 devpriv->dac_range[1] = dac_bipolar_2_5;
451 break;
452 case 2:
453 devpriv->dac_range[1] = dac_unipolar_5;
454 break;
455 default:
456 devpriv->dac_range[1] = dac_bipolar_5;
457 break;
458 }
459
460 s = dev->subdevices + 0;
461 /* initialize the ADC subdevice */
462 s->type = COMEDI_SUBD_AI;
463 s->subdev_flags = SDF_READABLE | SDF_GROUND;
464 s->n_chan = devpriv->adc_mux == adc_diff ? 8 : 16;
465 s->insn_read = dt2811_ai_insn;
466 s->maxdata = 0xfff;
467 switch (it->options[3]) {
468 case 0:
469 default:
470 s->range_table = this_board->bip_5;
471 break;
472 case 1:
473 s->range_table = this_board->bip_2_5;
474 break;
475 case 2:
476 s->range_table = this_board->unip_5;
477 break;
478 }
479
480 s = dev->subdevices + 1;
481 /* ao subdevice */
482 s->type = COMEDI_SUBD_AO;
483 s->subdev_flags = SDF_WRITABLE;
484 s->n_chan = 2;
485 s->insn_write = dt2811_ao_insn;
486 s->insn_read = dt2811_ao_insn_read;
487 s->maxdata = 0xfff;
488 s->range_table_list = devpriv->range_type_list;
489 devpriv->range_type_list[0] = dac_range_types[devpriv->dac_range[0]];
490 devpriv->range_type_list[1] = dac_range_types[devpriv->dac_range[1]];
491
492 s = dev->subdevices + 2;
493 /* di subdevice */
494 s->type = COMEDI_SUBD_DI;
495 s->subdev_flags = SDF_READABLE;
496 s->n_chan = 8;
497 s->insn_bits = dt2811_di_insn_bits;
498 s->maxdata = 1;
499 s->range_table = &range_digital;
500
501 s = dev->subdevices + 3;
502 /* do subdevice */
503 s->type = COMEDI_SUBD_DO;
504 s->subdev_flags = SDF_WRITABLE;
505 s->n_chan = 8;
506 s->insn_bits = dt2811_do_insn_bits;
507 s->maxdata = 1;
508 s->state = 0;
509 s->range_table = &range_digital;
510
511 return 0;
512 }
513
514 static int dt2811_detach(struct comedi_device *dev)
515 {
516 printk(KERN_INFO "comedi%d: dt2811: remove\n", dev->minor);
517
518 if (dev->irq)
519 free_irq(dev->irq, dev);
520 if (dev->iobase)
521 release_region(dev->iobase, DT2811_SIZE);
522
523 return 0;
524 }
525
526 static int dt2811_ai_insn(struct comedi_device *dev, struct comedi_subdevice *s,
527 struct comedi_insn *insn, unsigned int *data)
528 {
529 int chan = CR_CHAN(insn->chanspec);
530 int timeout = DT2811_TIMEOUT;
531 int i;
532
533 for (i = 0; i < insn->n; i++) {
534 outb(chan, dev->iobase + DT2811_ADGCR);
535
536 while (timeout
537 && inb(dev->iobase + DT2811_ADCSR) & DT2811_ADBUSY)
538 timeout--;
539 if (!timeout)
540 return -ETIME;
541
542 data[i] = inb(dev->iobase + DT2811_ADDATLO);
543 data[i] |= inb(dev->iobase + DT2811_ADDATHI) << 8;
544 data[i] &= 0xfff;
545 }
546
547 return i;
548 }
549
550 #if 0
551 /* Wow. This is code from the Comedi stone age. But it hasn't been
552 * replaced, so I'll let it stay. */
553 int dt2811_adtrig(kdev_t minor, comedi_adtrig *adtrig)
554 {
555 struct comedi_device *dev = comedi_devices + minor;
556
557 if (adtrig->n < 1)
558 return 0;
559 dev->curadchan = adtrig->chan;
560 switch (dev->i_admode) {
561 case COMEDI_MDEMAND:
562 dev->ntrig = adtrig->n - 1;
563 /* not necessary */
564 /*printk("dt2811: AD soft trigger\n"); */
565 /*outb(DT2811_CLRERROR|DT2811_INTENB,
566 dev->iobase+DT2811_ADCSR); */
567 outb(dev->curadchan, dev->iobase + DT2811_ADGCR);
568 do_gettimeofday(&trigtime);
569 break;
570 case COMEDI_MCONTS:
571 dev->ntrig = adtrig->n;
572 break;
573 }
574
575 return 0;
576 }
577 #endif
578
579 static int dt2811_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
580 struct comedi_insn *insn, unsigned int *data)
581 {
582 int i;
583 int chan;
584
585 chan = CR_CHAN(insn->chanspec);
586
587 for (i = 0; i < insn->n; i++) {
588 outb(data[i] & 0xff, dev->iobase + DT2811_DADAT0LO + 2 * chan);
589 outb((data[i] >> 8) & 0xff,
590 dev->iobase + DT2811_DADAT0HI + 2 * chan);
591 devpriv->ao_readback[chan] = data[i];
592 }
593
594 return i;
595 }
596
597 static int dt2811_ao_insn_read(struct comedi_device *dev,
598 struct comedi_subdevice *s,
599 struct comedi_insn *insn, unsigned int *data)
600 {
601 int i;
602 int chan;
603
604 chan = CR_CHAN(insn->chanspec);
605
606 for (i = 0; i < insn->n; i++)
607 data[i] = devpriv->ao_readback[chan];
608
609 return i;
610 }
611
612 static int dt2811_di_insn_bits(struct comedi_device *dev,
613 struct comedi_subdevice *s,
614 struct comedi_insn *insn, unsigned int *data)
615 {
616 if (insn->n != 2)
617 return -EINVAL;
618
619 data[1] = inb(dev->iobase + DT2811_DIO);
620
621 return 2;
622 }
623
624 static int dt2811_do_insn_bits(struct comedi_device *dev,
625 struct comedi_subdevice *s,
626 struct comedi_insn *insn, unsigned int *data)
627 {
628 if (insn->n != 2)
629 return -EINVAL;
630
631 s->state &= ~data[0];
632 s->state |= data[0] & data[1];
633 outb(s->state, dev->iobase + DT2811_DIO);
634
635 data[1] = s->state;
636
637 return 2;
638 }
639
640 MODULE_AUTHOR("Comedi http://www.comedi.org");
641 MODULE_DESCRIPTION("Comedi low-level driver");
642 MODULE_LICENSE("GPL");
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