2 * comedi/drivers/dt2801.c
3 * Device Driver for DataTranslation DT2801
8 Description: Data Translation DT2801 series and DT01-EZ
11 Devices: [Data Translation] DT2801 (dt2801), DT2801-A, DT2801/5716A,
12 DT2805, DT2805/5716A, DT2808, DT2818, DT2809, DT01-EZ
14 This driver can autoprobe the type of board.
16 Configuration options:
17 [0] - I/O port base address
19 [2] - A/D reference 0=differential, 1=single-ended
29 [5] - D/A 1 range (same choices)
32 #include "../comedidev.h"
33 #include <linux/delay.h>
34 #include <linux/ioport.h>
36 #define DT2801_TIMEOUT 1000
38 /* Hardware Configuration */
39 /* ====================== */
41 #define DT2801_MAX_DMA_SIZE (64 * 1024)
44 #define DT2801_IOSIZE 2
47 /* ====================== */
50 #define DT_C_RESET 0x0
51 #define DT_C_CLEAR_ERR 0x1
52 #define DT_C_READ_ERRREG 0x2
53 #define DT_C_SET_CLOCK 0x3
58 #define DT_C_SET_DIGIN 0x4
59 #define DT_C_SET_DIGOUT 0x5
60 #define DT_C_READ_DIG 0x6
61 #define DT_C_WRITE_DIG 0x7
63 #define DT_C_WRITE_DAIM 0x8
64 #define DT_C_SET_DA 0x9
65 #define DT_C_WRITE_DA 0xa
67 #define DT_C_READ_ADIM 0xc
68 #define DT_C_SET_AD 0xd
69 #define DT_C_READ_AD 0xe
71 /* Command modifiers (only used with read/write), EXTTRIG can be
72 used with some other commands.
74 #define DT_MOD_DMA (1<<4)
75 #define DT_MOD_CONT (1<<5)
76 #define DT_MOD_EXTCLK (1<<6)
77 #define DT_MOD_EXTTRIG (1<<7)
79 /* Bits in status register */
80 #define DT_S_DATA_OUT_READY (1<<0)
81 #define DT_S_DATA_IN_FULL (1<<1)
82 #define DT_S_READY (1<<2)
83 #define DT_S_COMMAND (1<<3)
84 #define DT_S_COMPOSITE_ERROR (1<<7)
88 #define DT2801_STATUS 1
91 static int dt2801_attach(struct comedi_device *dev, struct comedi_devconfig *it);
92 static int dt2801_detach(struct comedi_device *dev);
93 static struct comedi_driver driver_dt2801 = {
94 .driver_name = "dt2801",
95 .module = THIS_MODULE,
96 .attach = dt2801_attach,
97 .detach = dt2801_detach,
100 COMEDI_INITCLEANUP(driver_dt2801);
103 /* ignore 'defined but not used' warning */
104 static const struct comedi_lrange range_dt2801_ai_pgh_bipolar = { 4, {
112 static const struct comedi_lrange range_dt2801_ai_pgl_bipolar = { 4, {
121 /* ignore 'defined but not used' warning */
122 static const struct comedi_lrange range_dt2801_ai_pgh_unipolar = { 4, {
130 static const struct comedi_lrange range_dt2801_ai_pgl_unipolar = { 4, {
138 struct dt2801_board {
150 /* Typeid's for the different boards of the DT2801-series
151 (taken from the test-software, that comes with the board)
153 static const struct dt2801_board boardtypes[] = {
171 .name = "dt2801/5716a",
187 .name = "dt2805/5716a",
220 #define boardtype (*(const struct dt2801_board *)dev->board_ptr)
222 struct dt2801_private {
224 const struct comedi_lrange *dac_range_types[2];
225 unsigned int ao_readback[2];
228 #define devpriv ((struct dt2801_private *)dev->private)
230 static int dt2801_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s,
231 struct comedi_insn *insn, unsigned int *data);
232 static int dt2801_ao_insn_read(struct comedi_device *dev, struct comedi_subdevice *s,
233 struct comedi_insn *insn, unsigned int *data);
234 static int dt2801_ao_insn_write(struct comedi_device *dev, struct comedi_subdevice *s,
235 struct comedi_insn *insn, unsigned int *data);
236 static int dt2801_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
237 struct comedi_insn *insn, unsigned int *data);
238 static int dt2801_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
239 struct comedi_insn *insn, unsigned int *data);
241 /* These are the low-level routines:
242 writecommand: write a command to the board
243 writedata: write data byte
244 readdata: read data byte
247 /* Only checks DataOutReady-flag, not the Ready-flag as it is done
248 in the examples of the manual. I don't see why this should be
250 static int dt2801_readdata(struct comedi_device *dev, int *data)
253 int timeout = DT2801_TIMEOUT;
256 stat = inb_p(dev->iobase + DT2801_STATUS);
257 if (stat & (DT_S_COMPOSITE_ERROR | DT_S_READY)) {
260 if (stat & DT_S_DATA_OUT_READY) {
261 *data = inb_p(dev->iobase + DT2801_DATA);
264 } while (--timeout > 0);
269 static int dt2801_readdata2(struct comedi_device *dev, int *data)
274 ret = dt2801_readdata(dev, &lb);
277 ret = dt2801_readdata(dev, &hb);
281 *data = (hb << 8) + lb;
285 static int dt2801_writedata(struct comedi_device *dev, unsigned int data)
288 int timeout = DT2801_TIMEOUT;
291 stat = inb_p(dev->iobase + DT2801_STATUS);
293 if (stat & DT_S_COMPOSITE_ERROR) {
296 if (!(stat & DT_S_DATA_IN_FULL)) {
297 outb_p(data & 0xff, dev->iobase + DT2801_DATA);
301 if (stat & DT_S_READY) {
302 printk("dt2801: ready flag set (bad!) in dt2801_writedata()\n");
306 } while (--timeout > 0);
311 static int dt2801_writedata2(struct comedi_device *dev, unsigned int data)
315 ret = dt2801_writedata(dev, data & 0xff);
318 ret = dt2801_writedata(dev, (data >> 8));
325 static int dt2801_wait_for_ready(struct comedi_device *dev)
327 int timeout = DT2801_TIMEOUT;
330 stat = inb_p(dev->iobase + DT2801_STATUS);
331 if (stat & DT_S_READY) {
335 stat = inb_p(dev->iobase + DT2801_STATUS);
337 if (stat & DT_S_COMPOSITE_ERROR) {
340 if (stat & DT_S_READY) {
343 } while (--timeout > 0);
348 static int dt2801_writecmd(struct comedi_device *dev, int command)
352 dt2801_wait_for_ready(dev);
354 stat = inb_p(dev->iobase + DT2801_STATUS);
355 if (stat & DT_S_COMPOSITE_ERROR) {
356 printk("dt2801: composite-error in dt2801_writecmd(), ignoring\n");
358 if (!(stat & DT_S_READY)) {
359 printk("dt2801: !ready in dt2801_writecmd(), ignoring\n");
361 outb_p(command, dev->iobase + DT2801_CMD);
366 static int dt2801_reset(struct comedi_device *dev)
372 DPRINTK("dt2801: resetting board...\n");
373 DPRINTK("fingerprint: 0x%02x 0x%02x\n", inb_p(dev->iobase),
374 inb_p(dev->iobase + 1));
376 /* pull random data from data port */
377 inb_p(dev->iobase + DT2801_DATA);
378 inb_p(dev->iobase + DT2801_DATA);
379 inb_p(dev->iobase + DT2801_DATA);
380 inb_p(dev->iobase + DT2801_DATA);
382 DPRINTK("dt2801: stop\n");
383 /* dt2801_writecmd(dev,DT_C_STOP); */
384 outb_p(DT_C_STOP, dev->iobase + DT2801_CMD);
386 /* dt2801_wait_for_ready(dev); */
390 stat = inb_p(dev->iobase + DT2801_STATUS);
391 if (stat & DT_S_READY)
395 printk("dt2801: timeout 1 status=0x%02x\n", stat);
398 /* printk("dt2801: reading dummy\n"); */
399 /* dt2801_readdata(dev,&board_code); */
401 DPRINTK("dt2801: reset\n");
402 outb_p(DT_C_RESET, dev->iobase + DT2801_CMD);
403 /* dt2801_writecmd(dev,DT_C_RESET); */
408 stat = inb_p(dev->iobase + DT2801_STATUS);
409 if (stat & DT_S_READY)
413 printk("dt2801: timeout 2 status=0x%02x\n", stat);
416 DPRINTK("dt2801: reading code\n");
417 dt2801_readdata(dev, &board_code);
419 DPRINTK("dt2801: ok. code=0x%02x\n", board_code);
424 static int probe_number_of_ai_chans(struct comedi_device *dev)
430 for (n_chans = 0; n_chans < 16; n_chans++) {
431 stat = dt2801_writecmd(dev, DT_C_READ_ADIM);
432 dt2801_writedata(dev, 0);
433 dt2801_writedata(dev, n_chans);
434 stat = dt2801_readdata2(dev, &data);
446 static const struct comedi_lrange *dac_range_table[] = {
454 static const struct comedi_lrange *dac_range_lkup(int opt)
456 if (opt < 0 || opt > 5)
457 return &range_unknown;
458 return dac_range_table[opt];
461 static const struct comedi_lrange *ai_range_lkup(int type, int opt)
466 &range_dt2801_ai_pgl_unipolar :
467 &range_dt2801_ai_pgl_bipolar;
469 return (opt) ? &range_unipolar10 : &range_bipolar10;
471 return &range_unipolar5;
473 return &range_unknown;
480 [2] - a/d 0=differential, 1=single-ended
481 [3] - a/d range 0=[-10,10], 1=[0,10]
482 [4] - dac0 range 0=[-10,10], 1=[-5,5], 2=[-2.5,2.5] 3=[0,10], 4=[0,5]
483 [5] - dac1 range 0=[-10,10], 1=[-5,5], 2=[-2.5,2.5] 3=[0,10], 4=[0,5]
485 static int dt2801_attach(struct comedi_device *dev, struct comedi_devconfig *it)
487 struct comedi_subdevice *s;
488 unsigned long iobase;
489 int board_code, type;
493 iobase = it->options[0];
494 if (!request_region(iobase, DT2801_IOSIZE, "dt2801")) {
495 comedi_error(dev, "I/O port conflict");
498 dev->iobase = iobase;
500 /* do some checking */
502 board_code = dt2801_reset(dev);
504 /* heh. if it didn't work, try it again. */
506 board_code = dt2801_reset(dev);
508 for (type = 0; type < ARRAY_SIZE(boardtypes); type++) {
509 if (boardtypes[type].boardcode == board_code)
512 printk("dt2801: unrecognized board code=0x%02x, contact author\n",
517 dev->board_ptr = boardtypes + type;
518 printk("dt2801: %s at port 0x%lx", boardtype.name, iobase);
520 n_ai_chans = probe_number_of_ai_chans(dev);
521 printk(" (ai channels = %d)", n_ai_chans);
523 ret = alloc_subdevices(dev, 4);
527 ret = alloc_private(dev, sizeof(struct dt2801_private));
531 dev->board_name = boardtype.name;
533 s = dev->subdevices + 0;
535 s->type = COMEDI_SUBD_AI;
536 s->subdev_flags = SDF_READABLE | SDF_GROUND;
538 s->n_chan = n_ai_chans;
541 s->n_chan = boardtype.ad_chan;
543 s->n_chan = boardtype.ad_chan / 2;
545 s->maxdata = (1 << boardtype.adbits) - 1;
546 s->range_table = ai_range_lkup(boardtype.adrangetype, it->options[3]);
547 s->insn_read = dt2801_ai_insn_read;
551 s->type = COMEDI_SUBD_AO;
552 s->subdev_flags = SDF_WRITABLE;
554 s->maxdata = (1 << boardtype.dabits) - 1;
555 s->range_table_list = devpriv->dac_range_types;
556 devpriv->dac_range_types[0] = dac_range_lkup(it->options[4]);
557 devpriv->dac_range_types[1] = dac_range_lkup(it->options[5]);
558 s->insn_read = dt2801_ao_insn_read;
559 s->insn_write = dt2801_ao_insn_write;
562 /* 1st digital subdevice */
563 s->type = COMEDI_SUBD_DIO;
564 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
567 s->range_table = &range_digital;
568 s->insn_bits = dt2801_dio_insn_bits;
569 s->insn_config = dt2801_dio_insn_config;
572 /* 2nd digital subdevice */
573 s->type = COMEDI_SUBD_DIO;
574 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
577 s->range_table = &range_digital;
578 s->insn_bits = dt2801_dio_insn_bits;
579 s->insn_config = dt2801_dio_insn_config;
588 static int dt2801_detach(struct comedi_device *dev)
591 release_region(dev->iobase, DT2801_IOSIZE);
596 static int dt2801_error(struct comedi_device *dev, int stat)
599 if (stat == -ETIME) {
600 printk("dt2801: timeout\n");
602 printk("dt2801: error %d\n", stat);
606 printk("dt2801: error status 0x%02x, resetting...\n", stat);
614 static int dt2801_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s,
615 struct comedi_insn *insn, unsigned int *data)
621 for (i = 0; i < insn->n; i++) {
622 stat = dt2801_writecmd(dev, DT_C_READ_ADIM);
623 dt2801_writedata(dev, CR_RANGE(insn->chanspec));
624 dt2801_writedata(dev, CR_CHAN(insn->chanspec));
625 stat = dt2801_readdata2(dev, &d);
628 return dt2801_error(dev, stat);
636 static int dt2801_ao_insn_read(struct comedi_device *dev, struct comedi_subdevice *s,
637 struct comedi_insn *insn, unsigned int *data)
639 data[0] = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
644 static int dt2801_ao_insn_write(struct comedi_device *dev, struct comedi_subdevice *s,
645 struct comedi_insn *insn, unsigned int *data)
647 dt2801_writecmd(dev, DT_C_WRITE_DAIM);
648 dt2801_writedata(dev, CR_CHAN(insn->chanspec));
649 dt2801_writedata2(dev, data[0]);
651 devpriv->ao_readback[CR_CHAN(insn->chanspec)] = data[0];
656 static int dt2801_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
657 struct comedi_insn *insn, unsigned int *data)
661 if (s == dev->subdevices + 4)
667 s->state &= ~data[0];
668 s->state |= (data[0] & data[1]);
669 dt2801_writecmd(dev, DT_C_WRITE_DIG);
670 dt2801_writedata(dev, which);
671 dt2801_writedata(dev, s->state);
673 dt2801_writecmd(dev, DT_C_READ_DIG);
674 dt2801_writedata(dev, which);
675 dt2801_readdata(dev, data + 1);
680 static int dt2801_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
681 struct comedi_insn *insn, unsigned int *data)
685 if (s == dev->subdevices + 4)
691 dt2801_writecmd(dev, DT_C_SET_DIGOUT);
694 dt2801_writecmd(dev, DT_C_SET_DIGIN);
696 dt2801_writedata(dev, which);