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,
92 struct comedi_devconfig *it);
93 static int dt2801_detach(struct comedi_device *dev);
94 static struct comedi_driver driver_dt2801 = {
95 .driver_name = "dt2801",
96 .module = THIS_MODULE,
97 .attach = dt2801_attach,
98 .detach = dt2801_detach,
101 static int __init driver_dt2801_init_module(void)
103 return comedi_driver_register(&driver_dt2801);
106 static void __exit driver_dt2801_cleanup_module(void)
108 comedi_driver_unregister(&driver_dt2801);
111 module_init(driver_dt2801_init_module);
112 module_exit(driver_dt2801_cleanup_module);
115 /* ignore 'defined but not used' warning */
116 static const struct comedi_lrange range_dt2801_ai_pgh_bipolar = { 4, {
130 static const struct comedi_lrange range_dt2801_ai_pgl_bipolar = { 4, {
145 /* ignore 'defined but not used' warning */
146 static const struct comedi_lrange range_dt2801_ai_pgh_unipolar = { 4, {
158 static const struct comedi_lrange range_dt2801_ai_pgl_unipolar = { 4, {
170 struct dt2801_board {
181 /* Typeid's for the different boards of the DT2801-series
182 (taken from the test-software, that comes with the board)
184 static const struct dt2801_board boardtypes[] = {
202 .name = "dt2801/5716a",
218 .name = "dt2805/5716a",
251 #define boardtype (*(const struct dt2801_board *)dev->board_ptr)
253 struct dt2801_private {
255 const struct comedi_lrange *dac_range_types[2];
256 unsigned int ao_readback[2];
259 #define devpriv ((struct dt2801_private *)dev->private)
261 static int dt2801_ai_insn_read(struct comedi_device *dev,
262 struct comedi_subdevice *s,
263 struct comedi_insn *insn, unsigned int *data);
264 static int dt2801_ao_insn_read(struct comedi_device *dev,
265 struct comedi_subdevice *s,
266 struct comedi_insn *insn, unsigned int *data);
267 static int dt2801_ao_insn_write(struct comedi_device *dev,
268 struct comedi_subdevice *s,
269 struct comedi_insn *insn, unsigned int *data);
270 static int dt2801_dio_insn_bits(struct comedi_device *dev,
271 struct comedi_subdevice *s,
272 struct comedi_insn *insn, unsigned int *data);
273 static int dt2801_dio_insn_config(struct comedi_device *dev,
274 struct comedi_subdevice *s,
275 struct comedi_insn *insn, unsigned int *data);
277 /* These are the low-level routines:
278 writecommand: write a command to the board
279 writedata: write data byte
280 readdata: read data byte
283 /* Only checks DataOutReady-flag, not the Ready-flag as it is done
284 in the examples of the manual. I don't see why this should be
286 static int dt2801_readdata(struct comedi_device *dev, int *data)
289 int timeout = DT2801_TIMEOUT;
292 stat = inb_p(dev->iobase + DT2801_STATUS);
293 if (stat & (DT_S_COMPOSITE_ERROR | DT_S_READY))
295 if (stat & DT_S_DATA_OUT_READY) {
296 *data = inb_p(dev->iobase + DT2801_DATA);
299 } while (--timeout > 0);
304 static int dt2801_readdata2(struct comedi_device *dev, int *data)
309 ret = dt2801_readdata(dev, &lb);
312 ret = dt2801_readdata(dev, &hb);
316 *data = (hb << 8) + lb;
320 static int dt2801_writedata(struct comedi_device *dev, unsigned int data)
323 int timeout = DT2801_TIMEOUT;
326 stat = inb_p(dev->iobase + DT2801_STATUS);
328 if (stat & DT_S_COMPOSITE_ERROR)
330 if (!(stat & DT_S_DATA_IN_FULL)) {
331 outb_p(data & 0xff, dev->iobase + DT2801_DATA);
335 if (stat & DT_S_READY) {
337 ("dt2801: ready flag set (bad!) in dt2801_writedata()\n");
341 } while (--timeout > 0);
346 static int dt2801_writedata2(struct comedi_device *dev, unsigned int data)
350 ret = dt2801_writedata(dev, data & 0xff);
353 ret = dt2801_writedata(dev, (data >> 8));
360 static int dt2801_wait_for_ready(struct comedi_device *dev)
362 int timeout = DT2801_TIMEOUT;
365 stat = inb_p(dev->iobase + DT2801_STATUS);
366 if (stat & DT_S_READY)
369 stat = inb_p(dev->iobase + DT2801_STATUS);
371 if (stat & DT_S_COMPOSITE_ERROR)
373 if (stat & DT_S_READY)
375 } while (--timeout > 0);
380 static int dt2801_writecmd(struct comedi_device *dev, int command)
384 dt2801_wait_for_ready(dev);
386 stat = inb_p(dev->iobase + DT2801_STATUS);
387 if (stat & DT_S_COMPOSITE_ERROR) {
389 ("dt2801: composite-error in dt2801_writecmd(), ignoring\n");
391 if (!(stat & DT_S_READY))
392 printk("dt2801: !ready in dt2801_writecmd(), ignoring\n");
393 outb_p(command, dev->iobase + DT2801_CMD);
398 static int dt2801_reset(struct comedi_device *dev)
404 DPRINTK("dt2801: resetting board...\n");
405 DPRINTK("fingerprint: 0x%02x 0x%02x\n", inb_p(dev->iobase),
406 inb_p(dev->iobase + 1));
408 /* pull random data from data port */
409 inb_p(dev->iobase + DT2801_DATA);
410 inb_p(dev->iobase + DT2801_DATA);
411 inb_p(dev->iobase + DT2801_DATA);
412 inb_p(dev->iobase + DT2801_DATA);
414 DPRINTK("dt2801: stop\n");
415 /* dt2801_writecmd(dev,DT_C_STOP); */
416 outb_p(DT_C_STOP, dev->iobase + DT2801_CMD);
418 /* dt2801_wait_for_ready(dev); */
422 stat = inb_p(dev->iobase + DT2801_STATUS);
423 if (stat & DT_S_READY)
427 printk("dt2801: timeout 1 status=0x%02x\n", stat);
429 /* printk("dt2801: reading dummy\n"); */
430 /* dt2801_readdata(dev,&board_code); */
432 DPRINTK("dt2801: reset\n");
433 outb_p(DT_C_RESET, dev->iobase + DT2801_CMD);
434 /* dt2801_writecmd(dev,DT_C_RESET); */
439 stat = inb_p(dev->iobase + DT2801_STATUS);
440 if (stat & DT_S_READY)
444 printk("dt2801: timeout 2 status=0x%02x\n", stat);
446 DPRINTK("dt2801: reading code\n");
447 dt2801_readdata(dev, &board_code);
449 DPRINTK("dt2801: ok. code=0x%02x\n", board_code);
454 static int probe_number_of_ai_chans(struct comedi_device *dev)
460 for (n_chans = 0; n_chans < 16; n_chans++) {
461 stat = dt2801_writecmd(dev, DT_C_READ_ADIM);
462 dt2801_writedata(dev, 0);
463 dt2801_writedata(dev, n_chans);
464 stat = dt2801_readdata2(dev, &data);
476 static const struct comedi_lrange *dac_range_table[] = {
484 static const struct comedi_lrange *dac_range_lkup(int opt)
486 if (opt < 0 || opt >= 5)
487 return &range_unknown;
488 return dac_range_table[opt];
491 static const struct comedi_lrange *ai_range_lkup(int type, int opt)
496 &range_dt2801_ai_pgl_unipolar :
497 &range_dt2801_ai_pgl_bipolar;
499 return (opt) ? &range_unipolar10 : &range_bipolar10;
501 return &range_unipolar5;
503 return &range_unknown;
510 [2] - a/d 0=differential, 1=single-ended
511 [3] - a/d range 0=[-10,10], 1=[0,10]
512 [4] - dac0 range 0=[-10,10], 1=[-5,5], 2=[-2.5,2.5] 3=[0,10], 4=[0,5]
513 [5] - dac1 range 0=[-10,10], 1=[-5,5], 2=[-2.5,2.5] 3=[0,10], 4=[0,5]
515 static int dt2801_attach(struct comedi_device *dev, struct comedi_devconfig *it)
517 struct comedi_subdevice *s;
518 unsigned long iobase;
519 int board_code, type;
523 iobase = it->options[0];
524 if (!request_region(iobase, DT2801_IOSIZE, "dt2801")) {
525 comedi_error(dev, "I/O port conflict");
528 dev->iobase = iobase;
530 /* do some checking */
532 board_code = dt2801_reset(dev);
534 /* heh. if it didn't work, try it again. */
536 board_code = dt2801_reset(dev);
538 for (type = 0; type < ARRAY_SIZE(boardtypes); type++) {
539 if (boardtypes[type].boardcode == board_code)
542 printk("dt2801: unrecognized board code=0x%02x, contact author\n",
547 dev->board_ptr = boardtypes + type;
548 printk("dt2801: %s at port 0x%lx", boardtype.name, iobase);
550 n_ai_chans = probe_number_of_ai_chans(dev);
551 printk(" (ai channels = %d)", n_ai_chans);
553 ret = alloc_subdevices(dev, 4);
557 ret = alloc_private(dev, sizeof(struct dt2801_private));
561 dev->board_name = boardtype.name;
563 s = dev->subdevices + 0;
565 s->type = COMEDI_SUBD_AI;
566 s->subdev_flags = SDF_READABLE | SDF_GROUND;
568 s->n_chan = n_ai_chans;
571 s->n_chan = boardtype.ad_chan;
573 s->n_chan = boardtype.ad_chan / 2;
575 s->maxdata = (1 << boardtype.adbits) - 1;
576 s->range_table = ai_range_lkup(boardtype.adrangetype, it->options[3]);
577 s->insn_read = dt2801_ai_insn_read;
581 s->type = COMEDI_SUBD_AO;
582 s->subdev_flags = SDF_WRITABLE;
584 s->maxdata = (1 << boardtype.dabits) - 1;
585 s->range_table_list = devpriv->dac_range_types;
586 devpriv->dac_range_types[0] = dac_range_lkup(it->options[4]);
587 devpriv->dac_range_types[1] = dac_range_lkup(it->options[5]);
588 s->insn_read = dt2801_ao_insn_read;
589 s->insn_write = dt2801_ao_insn_write;
592 /* 1st digital subdevice */
593 s->type = COMEDI_SUBD_DIO;
594 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
597 s->range_table = &range_digital;
598 s->insn_bits = dt2801_dio_insn_bits;
599 s->insn_config = dt2801_dio_insn_config;
602 /* 2nd digital subdevice */
603 s->type = COMEDI_SUBD_DIO;
604 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
607 s->range_table = &range_digital;
608 s->insn_bits = dt2801_dio_insn_bits;
609 s->insn_config = dt2801_dio_insn_config;
618 static int dt2801_detach(struct comedi_device *dev)
621 release_region(dev->iobase, DT2801_IOSIZE);
626 static int dt2801_error(struct comedi_device *dev, int stat)
630 printk("dt2801: timeout\n");
632 printk("dt2801: error %d\n", stat);
635 printk("dt2801: error status 0x%02x, resetting...\n", stat);
643 static int dt2801_ai_insn_read(struct comedi_device *dev,
644 struct comedi_subdevice *s,
645 struct comedi_insn *insn, unsigned int *data)
651 for (i = 0; i < insn->n; i++) {
652 stat = dt2801_writecmd(dev, DT_C_READ_ADIM);
653 dt2801_writedata(dev, CR_RANGE(insn->chanspec));
654 dt2801_writedata(dev, CR_CHAN(insn->chanspec));
655 stat = dt2801_readdata2(dev, &d);
658 return dt2801_error(dev, stat);
666 static int dt2801_ao_insn_read(struct comedi_device *dev,
667 struct comedi_subdevice *s,
668 struct comedi_insn *insn, unsigned int *data)
670 data[0] = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
675 static int dt2801_ao_insn_write(struct comedi_device *dev,
676 struct comedi_subdevice *s,
677 struct comedi_insn *insn, unsigned int *data)
679 dt2801_writecmd(dev, DT_C_WRITE_DAIM);
680 dt2801_writedata(dev, CR_CHAN(insn->chanspec));
681 dt2801_writedata2(dev, data[0]);
683 devpriv->ao_readback[CR_CHAN(insn->chanspec)] = data[0];
688 static int dt2801_dio_insn_bits(struct comedi_device *dev,
689 struct comedi_subdevice *s,
690 struct comedi_insn *insn, unsigned int *data)
694 if (s == dev->subdevices + 4)
700 s->state &= ~data[0];
701 s->state |= (data[0] & data[1]);
702 dt2801_writecmd(dev, DT_C_WRITE_DIG);
703 dt2801_writedata(dev, which);
704 dt2801_writedata(dev, s->state);
706 dt2801_writecmd(dev, DT_C_READ_DIG);
707 dt2801_writedata(dev, which);
708 dt2801_readdata(dev, data + 1);
713 static int dt2801_dio_insn_config(struct comedi_device *dev,
714 struct comedi_subdevice *s,
715 struct comedi_insn *insn, unsigned int *data)
719 if (s == dev->subdevices + 4)
725 dt2801_writecmd(dev, DT_C_SET_DIGOUT);
728 dt2801_writecmd(dev, DT_C_SET_DIGIN);
730 dt2801_writedata(dev, which);
735 MODULE_AUTHOR("Comedi http://www.comedi.org");
736 MODULE_DESCRIPTION("Comedi low-level driver");
737 MODULE_LICENSE("GPL");