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
92 /* ignore 'defined but not used' warning */
93 static const struct comedi_lrange range_dt2801_ai_pgh_bipolar = { 4, {
107 static const struct comedi_lrange range_dt2801_ai_pgl_bipolar = { 4, {
122 /* ignore 'defined but not used' warning */
123 static const struct comedi_lrange range_dt2801_ai_pgh_unipolar = { 4, {
135 static const struct comedi_lrange range_dt2801_ai_pgl_unipolar = { 4, {
147 struct dt2801_board {
158 /* Typeid's for the different boards of the DT2801-series
159 (taken from the test-software, that comes with the board)
161 static const struct dt2801_board boardtypes[] = {
179 .name = "dt2801/5716a",
195 .name = "dt2805/5716a",
228 struct dt2801_private {
230 const struct comedi_lrange *dac_range_types[2];
231 unsigned int ao_readback[2];
234 /* These are the low-level routines:
235 writecommand: write a command to the board
236 writedata: write data byte
237 readdata: read data byte
240 /* Only checks DataOutReady-flag, not the Ready-flag as it is done
241 in the examples of the manual. I don't see why this should be
243 static int dt2801_readdata(struct comedi_device *dev, int *data)
246 int timeout = DT2801_TIMEOUT;
249 stat = inb_p(dev->iobase + DT2801_STATUS);
250 if (stat & (DT_S_COMPOSITE_ERROR | DT_S_READY))
252 if (stat & DT_S_DATA_OUT_READY) {
253 *data = inb_p(dev->iobase + DT2801_DATA);
256 } while (--timeout > 0);
261 static int dt2801_readdata2(struct comedi_device *dev, int *data)
266 ret = dt2801_readdata(dev, &lb);
269 ret = dt2801_readdata(dev, &hb);
273 *data = (hb << 8) + lb;
277 static int dt2801_writedata(struct comedi_device *dev, unsigned int data)
280 int timeout = DT2801_TIMEOUT;
283 stat = inb_p(dev->iobase + DT2801_STATUS);
285 if (stat & DT_S_COMPOSITE_ERROR)
287 if (!(stat & DT_S_DATA_IN_FULL)) {
288 outb_p(data & 0xff, dev->iobase + DT2801_DATA);
292 if (stat & DT_S_READY) {
294 ("dt2801: ready flag set (bad!) in dt2801_writedata()\n");
298 } while (--timeout > 0);
303 static int dt2801_writedata2(struct comedi_device *dev, unsigned int data)
307 ret = dt2801_writedata(dev, data & 0xff);
310 ret = dt2801_writedata(dev, (data >> 8));
317 static int dt2801_wait_for_ready(struct comedi_device *dev)
319 int timeout = DT2801_TIMEOUT;
322 stat = inb_p(dev->iobase + DT2801_STATUS);
323 if (stat & DT_S_READY)
326 stat = inb_p(dev->iobase + DT2801_STATUS);
328 if (stat & DT_S_COMPOSITE_ERROR)
330 if (stat & DT_S_READY)
332 } while (--timeout > 0);
337 static int dt2801_writecmd(struct comedi_device *dev, int command)
341 dt2801_wait_for_ready(dev);
343 stat = inb_p(dev->iobase + DT2801_STATUS);
344 if (stat & DT_S_COMPOSITE_ERROR) {
346 ("dt2801: composite-error in dt2801_writecmd(), ignoring\n");
348 if (!(stat & DT_S_READY))
349 printk("dt2801: !ready in dt2801_writecmd(), ignoring\n");
350 outb_p(command, dev->iobase + DT2801_CMD);
355 static int dt2801_reset(struct comedi_device *dev)
361 DPRINTK("dt2801: resetting board...\n");
362 DPRINTK("fingerprint: 0x%02x 0x%02x\n", inb_p(dev->iobase),
363 inb_p(dev->iobase + 1));
365 /* pull random data from data port */
366 inb_p(dev->iobase + DT2801_DATA);
367 inb_p(dev->iobase + DT2801_DATA);
368 inb_p(dev->iobase + DT2801_DATA);
369 inb_p(dev->iobase + DT2801_DATA);
371 DPRINTK("dt2801: stop\n");
372 /* dt2801_writecmd(dev,DT_C_STOP); */
373 outb_p(DT_C_STOP, dev->iobase + DT2801_CMD);
375 /* dt2801_wait_for_ready(dev); */
379 stat = inb_p(dev->iobase + DT2801_STATUS);
380 if (stat & DT_S_READY)
384 printk("dt2801: timeout 1 status=0x%02x\n", stat);
386 /* printk("dt2801: reading dummy\n"); */
387 /* dt2801_readdata(dev,&board_code); */
389 DPRINTK("dt2801: reset\n");
390 outb_p(DT_C_RESET, dev->iobase + DT2801_CMD);
391 /* dt2801_writecmd(dev,DT_C_RESET); */
396 stat = inb_p(dev->iobase + DT2801_STATUS);
397 if (stat & DT_S_READY)
401 printk("dt2801: timeout 2 status=0x%02x\n", stat);
403 DPRINTK("dt2801: reading code\n");
404 dt2801_readdata(dev, &board_code);
406 DPRINTK("dt2801: ok. code=0x%02x\n", board_code);
411 static int probe_number_of_ai_chans(struct comedi_device *dev)
417 for (n_chans = 0; n_chans < 16; n_chans++) {
418 stat = dt2801_writecmd(dev, DT_C_READ_ADIM);
419 dt2801_writedata(dev, 0);
420 dt2801_writedata(dev, n_chans);
421 stat = dt2801_readdata2(dev, &data);
433 static const struct comedi_lrange *dac_range_table[] = {
441 static const struct comedi_lrange *dac_range_lkup(int opt)
443 if (opt < 0 || opt >= 5)
444 return &range_unknown;
445 return dac_range_table[opt];
448 static const struct comedi_lrange *ai_range_lkup(int type, int opt)
453 &range_dt2801_ai_pgl_unipolar :
454 &range_dt2801_ai_pgl_bipolar;
456 return (opt) ? &range_unipolar10 : &range_bipolar10;
458 return &range_unipolar5;
460 return &range_unknown;
463 static int dt2801_error(struct comedi_device *dev, int stat)
467 printk("dt2801: timeout\n");
469 printk("dt2801: error %d\n", stat);
472 printk("dt2801: error status 0x%02x, resetting...\n", stat);
480 static int dt2801_ai_insn_read(struct comedi_device *dev,
481 struct comedi_subdevice *s,
482 struct comedi_insn *insn, unsigned int *data)
488 for (i = 0; i < insn->n; i++) {
489 stat = dt2801_writecmd(dev, DT_C_READ_ADIM);
490 dt2801_writedata(dev, CR_RANGE(insn->chanspec));
491 dt2801_writedata(dev, CR_CHAN(insn->chanspec));
492 stat = dt2801_readdata2(dev, &d);
495 return dt2801_error(dev, stat);
503 static int dt2801_ao_insn_read(struct comedi_device *dev,
504 struct comedi_subdevice *s,
505 struct comedi_insn *insn, unsigned int *data)
507 struct dt2801_private *devpriv = dev->private;
509 data[0] = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
514 static int dt2801_ao_insn_write(struct comedi_device *dev,
515 struct comedi_subdevice *s,
516 struct comedi_insn *insn, unsigned int *data)
518 struct dt2801_private *devpriv = dev->private;
520 dt2801_writecmd(dev, DT_C_WRITE_DAIM);
521 dt2801_writedata(dev, CR_CHAN(insn->chanspec));
522 dt2801_writedata2(dev, data[0]);
524 devpriv->ao_readback[CR_CHAN(insn->chanspec)] = data[0];
529 static int dt2801_dio_insn_bits(struct comedi_device *dev,
530 struct comedi_subdevice *s,
531 struct comedi_insn *insn, unsigned int *data)
535 if (s == &dev->subdevices[3])
539 s->state &= ~data[0];
540 s->state |= (data[0] & data[1]);
541 dt2801_writecmd(dev, DT_C_WRITE_DIG);
542 dt2801_writedata(dev, which);
543 dt2801_writedata(dev, s->state);
545 dt2801_writecmd(dev, DT_C_READ_DIG);
546 dt2801_writedata(dev, which);
547 dt2801_readdata(dev, data + 1);
552 static int dt2801_dio_insn_config(struct comedi_device *dev,
553 struct comedi_subdevice *s,
554 struct comedi_insn *insn, unsigned int *data)
558 if (s == &dev->subdevices[3])
563 case INSN_CONFIG_DIO_OUTPUT:
565 dt2801_writecmd(dev, DT_C_SET_DIGOUT);
567 case INSN_CONFIG_DIO_INPUT:
569 dt2801_writecmd(dev, DT_C_SET_DIGIN);
571 case INSN_CONFIG_DIO_QUERY:
572 data[1] = s->io_bits ? COMEDI_OUTPUT : COMEDI_INPUT;
577 dt2801_writedata(dev, which);
586 [2] - a/d 0=differential, 1=single-ended
587 [3] - a/d range 0=[-10,10], 1=[0,10]
588 [4] - dac0 range 0=[-10,10], 1=[-5,5], 2=[-2.5,2.5] 3=[0,10], 4=[0,5]
589 [5] - dac1 range 0=[-10,10], 1=[-5,5], 2=[-2.5,2.5] 3=[0,10], 4=[0,5]
591 static int dt2801_attach(struct comedi_device *dev, struct comedi_devconfig *it)
593 const struct dt2801_board *board = comedi_board(dev);
594 struct dt2801_private *devpriv;
595 struct comedi_subdevice *s;
596 int board_code, type;
600 ret = comedi_request_region(dev, it->options[0], DT2801_IOSIZE);
604 /* do some checking */
606 board_code = dt2801_reset(dev);
608 /* heh. if it didn't work, try it again. */
610 board_code = dt2801_reset(dev);
612 for (type = 0; type < ARRAY_SIZE(boardtypes); type++) {
613 if (boardtypes[type].boardcode == board_code)
616 printk("dt2801: unrecognized board code=0x%02x, contact author\n",
621 dev->board_ptr = boardtypes + type;
622 board = comedi_board(dev);
624 n_ai_chans = probe_number_of_ai_chans(dev);
626 ret = comedi_alloc_subdevices(dev, 4);
630 devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
633 dev->private = devpriv;
635 dev->board_name = board->name;
637 s = &dev->subdevices[0];
639 s->type = COMEDI_SUBD_AI;
640 s->subdev_flags = SDF_READABLE | SDF_GROUND;
642 s->n_chan = n_ai_chans;
645 s->n_chan = board->ad_chan;
647 s->n_chan = board->ad_chan / 2;
649 s->maxdata = (1 << board->adbits) - 1;
650 s->range_table = ai_range_lkup(board->adrangetype, it->options[3]);
651 s->insn_read = dt2801_ai_insn_read;
653 s = &dev->subdevices[1];
655 s->type = COMEDI_SUBD_AO;
656 s->subdev_flags = SDF_WRITABLE;
658 s->maxdata = (1 << board->dabits) - 1;
659 s->range_table_list = devpriv->dac_range_types;
660 devpriv->dac_range_types[0] = dac_range_lkup(it->options[4]);
661 devpriv->dac_range_types[1] = dac_range_lkup(it->options[5]);
662 s->insn_read = dt2801_ao_insn_read;
663 s->insn_write = dt2801_ao_insn_write;
665 s = &dev->subdevices[2];
666 /* 1st digital subdevice */
667 s->type = COMEDI_SUBD_DIO;
668 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
671 s->range_table = &range_digital;
672 s->insn_bits = dt2801_dio_insn_bits;
673 s->insn_config = dt2801_dio_insn_config;
675 s = &dev->subdevices[3];
676 /* 2nd digital subdevice */
677 s->type = COMEDI_SUBD_DIO;
678 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
681 s->range_table = &range_digital;
682 s->insn_bits = dt2801_dio_insn_bits;
683 s->insn_config = dt2801_dio_insn_config;
690 static struct comedi_driver dt2801_driver = {
691 .driver_name = "dt2801",
692 .module = THIS_MODULE,
693 .attach = dt2801_attach,
694 .detach = comedi_legacy_detach,
696 module_comedi_driver(dt2801_driver);
698 MODULE_AUTHOR("Comedi http://www.comedi.org");
699 MODULE_DESCRIPTION("Comedi low-level driver");
700 MODULE_LICENSE("GPL");