2 comedi/drivers/das800.c
3 Driver for Keitley das800 series boards and compatibles
4 Copyright (C) 2000 Frank Mori Hess <fmhess@users.sourceforge.net>
6 COMEDI - Linux Control and Measurement Device Interface
7 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 ************************************************************************
27 Description: Keithley Metrabyte DAS800 (& compatibles)
28 Author: Frank Mori Hess <fmhess@users.sourceforge.net>
29 Devices: [Keithley Metrabyte] DAS-800 (das-800), DAS-801 (das-801),
31 [Measurement Computing] CIO-DAS800 (cio-das800),
32 CIO-DAS801 (cio-das801), CIO-DAS802 (cio-das802),
33 CIO-DAS802/16 (cio-das802/16)
34 Status: works, cio-das802/16 untested - email me if you have tested it
36 Configuration options:
37 [0] - I/O port base address
38 [1] - IRQ (optional, required for timed or externally triggered conversions)
41 IRQ can be omitted, although the cmd interface will not work without it.
43 All entries in the channel/gain list must use the same gain and be
44 consecutive channels counting upwards in channel number (these are
45 hardware limitations.)
47 I've never tested the gain setting stuff since I only have a
48 DAS-800 board with fixed gain.
50 The cio-das802/16 does not have a fifo-empty status bit! Therefore
51 only fifo-half-full transfers are possible with this card.
55 cmd triggers supported:
56 start_src: TRIG_NOW | TRIG_EXT
57 scan_begin_src: TRIG_FOLLOW
58 scan_end_src: TRIG_COUNT
59 convert_src: TRIG_TIMER | TRIG_EXT
60 stop_src: TRIG_NONE | TRIG_COUNT
65 #include <linux/interrupt.h>
66 #include "../comedidev.h"
68 #include <linux/ioport.h>
69 #include <linux/delay.h>
72 #include "comedi_fc.h"
75 #define TIMER_BASE 1000
76 #define N_CHAN_AI 8 /* number of analog input channels */
78 /* Registers for the das800 */
81 #define FIFO_EMPTY 0x1
84 #define DAS800_CONTROL1 2
85 #define CONTROL1_INTE 0x8
86 #define DAS800_CONV_CONTROL 2
92 #define CONV_HCEN 0x80
93 #define DAS800_SCAN_LIMITS 2
94 #define DAS800_STATUS 2
98 #define CIO_FFOV 0x8 /* fifo overflow for cio-das802/16 */
99 #define CIO_ENHF 0x90 /* interrupt fifo half full for cio-das802/16 */
100 #define CONTROL1 0x80
101 #define CONV_CONTROL 0xa0
102 #define SCAN_LIMITS 0xc0
104 #define DAS800_8254 4
105 #define DAS800_STATUS2 7
106 #define STATUS2_HCEN 0x80
107 #define STATUS2_INTE 0X20
110 struct das800_board {
113 const struct comedi_lrange *ai_range;
117 /* analog input ranges */
118 static const struct comedi_lrange range_das800_ai = {
125 static const struct comedi_lrange range_das801_ai = {
140 static const struct comedi_lrange range_cio_das801_ai = {
150 RANGE(-0.005, 0.005),
155 static const struct comedi_lrange range_das802_ai = {
165 RANGE(-0.625, 0.625),
170 static const struct comedi_lrange range_das80216_ai = {
184 enum { das800, ciodas800, das801, ciodas801, das802, ciodas802, ciodas80216 };
186 static const struct das800_board das800_boards[] = {
190 .ai_range = &range_das800_ai,
194 .name = "cio-das800",
196 .ai_range = &range_das800_ai,
202 .ai_range = &range_das801_ai,
206 .name = "cio-das801",
208 .ai_range = &range_cio_das801_ai,
214 .ai_range = &range_das802_ai,
218 .name = "cio-das802",
220 .ai_range = &range_das802_ai,
224 .name = "cio-das802/16",
226 .ai_range = &range_das80216_ai,
232 * Useful for shorthand access to the particular board structure
234 #define thisboard ((const struct das800_board *)dev->board_ptr)
236 struct das800_private {
237 volatile unsigned int count; /* number of data points left to be taken */
238 volatile int forever; /* flag indicating whether we should take data forever */
239 unsigned int divisor1; /* value to load into board's counter 1 for timed conversions */
240 unsigned int divisor2; /* value to load into board's counter 2 for timed conversions */
241 volatile int do_bits; /* digital output bits */
244 static int das800_attach(struct comedi_device *dev,
245 struct comedi_devconfig *it);
246 static void das800_detach(struct comedi_device *dev);
247 static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
249 static struct comedi_driver driver_das800 = {
250 .driver_name = "das800",
251 .module = THIS_MODULE,
252 .attach = das800_attach,
253 .detach = das800_detach,
254 .num_names = ARRAY_SIZE(das800_boards),
255 .board_name = &das800_boards[0].name,
256 .offset = sizeof(struct das800_board),
259 static irqreturn_t das800_interrupt(int irq, void *d);
260 static void enable_das800(struct comedi_device *dev);
261 static void disable_das800(struct comedi_device *dev);
262 static int das800_ai_do_cmdtest(struct comedi_device *dev,
263 struct comedi_subdevice *s,
264 struct comedi_cmd *cmd);
265 static int das800_ai_do_cmd(struct comedi_device *dev,
266 struct comedi_subdevice *s);
267 static int das800_ai_rinsn(struct comedi_device *dev,
268 struct comedi_subdevice *s, struct comedi_insn *insn,
270 static int das800_di_rbits(struct comedi_device *dev,
271 struct comedi_subdevice *s, struct comedi_insn *insn,
273 static int das800_do_wbits(struct comedi_device *dev,
274 struct comedi_subdevice *s, struct comedi_insn *insn,
276 static int das800_probe(struct comedi_device *dev);
277 static int das800_set_frequency(struct comedi_device *dev);
279 /* checks and probes das-800 series board type */
280 static int das800_probe(struct comedi_device *dev)
283 unsigned long irq_flags;
286 /* 'comedi spin lock irqsave' disables even rt interrupts, we use them to protect indirect addressing */
287 spin_lock_irqsave(&dev->spinlock, irq_flags);
288 outb(ID, dev->iobase + DAS800_GAIN); /* select base address + 7 to be ID register */
289 id_bits = inb(dev->iobase + DAS800_ID) & 0x3; /* get id bits */
290 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
292 board = thisboard - das800_boards;
296 if (board == das800) {
297 dev_dbg(dev->class_dev, "Board model: DAS-800\n");
300 if (board == ciodas800) {
301 dev_dbg(dev->class_dev, "Board model: CIO-DAS800\n");
304 dev_dbg(dev->class_dev, "Board model (probed): DAS-800\n");
308 if (board == das801) {
309 dev_dbg(dev->class_dev, "Board model: DAS-801\n");
312 if (board == ciodas801) {
313 dev_dbg(dev->class_dev, "Board model: CIO-DAS801\n");
316 dev_dbg(dev->class_dev, "Board model (probed): DAS-801\n");
320 if (board == das802) {
321 dev_dbg(dev->class_dev, "Board model: DAS-802\n");
324 if (board == ciodas802) {
325 dev_dbg(dev->class_dev, "Board model: CIO-DAS802\n");
328 if (board == ciodas80216) {
329 dev_dbg(dev->class_dev, "Board model: CIO-DAS802/16\n");
332 dev_dbg(dev->class_dev, "Board model (probed): DAS-802\n");
336 dev_dbg(dev->class_dev,
337 "Board model: probe returned 0x%x (unknown)\n",
346 * A convenient macro that defines init_module() and cleanup_module(),
349 static int __init driver_das800_init_module(void)
351 return comedi_driver_register(&driver_das800);
354 static void __exit driver_das800_cleanup_module(void)
356 comedi_driver_unregister(&driver_das800);
359 module_init(driver_das800_init_module);
360 module_exit(driver_das800_cleanup_module);
362 /* interrupt service routine */
363 static irqreturn_t das800_interrupt(int irq, void *d)
365 short i; /* loop index */
367 struct comedi_device *dev = d;
368 struct das800_private *devpriv = dev->private;
369 struct comedi_subdevice *s = dev->read_subdev; /* analog input subdevice */
370 struct comedi_async *async;
372 unsigned long irq_flags;
373 static const int max_loops = 128; /* half-fifo size for cio-das802/16 */
376 int fifo_overflow = 0;
378 status = inb(dev->iobase + DAS800_STATUS);
379 /* if interrupt was not generated by board or driver not attached, quit */
382 if (!(dev->attached))
385 /* wait until here to initialize async, since we will get null dereference
386 * if interrupt occurs before driver is fully attached!
390 /* if hardware conversions are not enabled, then quit */
391 spin_lock_irqsave(&dev->spinlock, irq_flags);
392 outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select base address + 7 to be STATUS2 register */
393 status = inb(dev->iobase + DAS800_STATUS2) & STATUS2_HCEN;
394 /* don't release spinlock yet since we want to make sure no one else disables hardware conversions */
396 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
400 /* loop while card's fifo is not empty (and limit to half fifo for cio-das802/16) */
401 for (i = 0; i < max_loops; i++) {
402 /* read 16 bits from dev->iobase and dev->iobase + 1 */
403 dataPoint = inb(dev->iobase + DAS800_LSB);
404 dataPoint += inb(dev->iobase + DAS800_MSB) << 8;
405 if (thisboard->resolution == 12) {
406 fifo_empty = dataPoint & FIFO_EMPTY;
407 fifo_overflow = dataPoint & FIFO_OVF;
411 fifo_empty = 0; /* cio-das802/16 has no fifo empty status bit */
415 /* strip off extraneous bits for 12 bit cards */
416 if (thisboard->resolution == 12)
417 dataPoint = (dataPoint >> 4) & 0xfff;
418 /* if there are more data points to collect */
419 if (devpriv->count > 0 || devpriv->forever == 1) {
420 /* write data point to buffer */
421 cfc_write_to_buffer(s, dataPoint);
422 if (devpriv->count > 0)
426 async->events |= COMEDI_CB_BLOCK;
427 /* check for fifo overflow */
428 if (thisboard->resolution == 12) {
429 fifo_overflow = dataPoint & FIFO_OVF;
430 /* else cio-das802/16 */
432 fifo_overflow = inb(dev->iobase + DAS800_GAIN) & CIO_FFOV;
435 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
436 comedi_error(dev, "DAS800 FIFO overflow");
437 das800_cancel(dev, s);
438 async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
439 comedi_event(dev, s);
443 if (devpriv->count > 0 || devpriv->forever == 1) {
444 /* Re-enable card's interrupt.
445 * We already have spinlock, so indirect addressing is safe */
446 outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
447 outb(CONTROL1_INTE | devpriv->do_bits,
448 dev->iobase + DAS800_CONTROL1);
449 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
450 /* otherwise, stop taking data */
452 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
453 disable_das800(dev); /* disable hardware triggered conversions */
454 async->events |= COMEDI_CB_EOA;
456 comedi_event(dev, s);
461 static int das800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
463 struct das800_private *devpriv;
464 struct comedi_subdevice *s;
465 unsigned long iobase = it->options[0];
466 unsigned int irq = it->options[1];
467 unsigned long irq_flags;
471 dev_info(dev->class_dev, "das800: io 0x%lx\n", iobase);
473 dev_dbg(dev->class_dev, "irq %u\n", irq);
475 ret = alloc_private(dev, sizeof(*devpriv));
478 devpriv = dev->private;
481 dev_err(dev->class_dev,
482 "io base address required for das800\n");
486 /* check if io addresses are available */
487 if (!request_region(iobase, DAS800_SIZE, "das800")) {
488 dev_err(dev->class_dev, "I/O port conflict\n");
491 dev->iobase = iobase;
493 board = das800_probe(dev);
495 dev_dbg(dev->class_dev, "unable to determine board type\n");
498 dev->board_ptr = das800_boards + board;
501 if (irq == 1 || irq > 7) {
502 dev_err(dev->class_dev, "irq out of range\n");
506 if (request_irq(irq, das800_interrupt, 0, "das800", dev)) {
507 dev_err(dev->class_dev, "unable to allocate irq %u\n",
514 dev->board_name = thisboard->name;
516 ret = comedi_alloc_subdevices(dev, 3);
520 /* analog input subdevice */
521 s = &dev->subdevices[0];
522 dev->read_subdev = s;
523 s->type = COMEDI_SUBD_AI;
524 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
527 s->maxdata = (1 << thisboard->resolution) - 1;
528 s->range_table = thisboard->ai_range;
529 s->do_cmd = das800_ai_do_cmd;
530 s->do_cmdtest = das800_ai_do_cmdtest;
531 s->insn_read = das800_ai_rinsn;
532 s->cancel = das800_cancel;
535 s = &dev->subdevices[1];
536 s->type = COMEDI_SUBD_DI;
537 s->subdev_flags = SDF_READABLE;
540 s->range_table = &range_digital;
541 s->insn_bits = das800_di_rbits;
544 s = &dev->subdevices[2];
545 s->type = COMEDI_SUBD_DO;
546 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
549 s->range_table = &range_digital;
550 s->insn_bits = das800_do_wbits;
554 /* initialize digital out channels */
555 spin_lock_irqsave(&dev->spinlock, irq_flags);
556 outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
557 outb(CONTROL1_INTE | devpriv->do_bits, dev->iobase + DAS800_CONTROL1);
558 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
563 static void das800_detach(struct comedi_device *dev)
566 release_region(dev->iobase, DAS800_SIZE);
568 free_irq(dev->irq, dev);
571 static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
573 struct das800_private *devpriv = dev->private;
575 devpriv->forever = 0;
581 /* enable_das800 makes the card start taking hardware triggered conversions */
582 static void enable_das800(struct comedi_device *dev)
584 struct das800_private *devpriv = dev->private;
585 unsigned long irq_flags;
587 spin_lock_irqsave(&dev->spinlock, irq_flags);
588 /* enable fifo-half full interrupts for cio-das802/16 */
589 if (thisboard->resolution == 16)
590 outb(CIO_ENHF, dev->iobase + DAS800_GAIN);
591 outb(CONV_CONTROL, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be conversion control register */
592 outb(CONV_HCEN, dev->iobase + DAS800_CONV_CONTROL); /* enable hardware triggering */
593 outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
594 outb(CONTROL1_INTE | devpriv->do_bits, dev->iobase + DAS800_CONTROL1); /* enable card's interrupt */
595 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
598 /* disable_das800 stops hardware triggered conversions */
599 static void disable_das800(struct comedi_device *dev)
601 unsigned long irq_flags;
602 spin_lock_irqsave(&dev->spinlock, irq_flags);
603 outb(CONV_CONTROL, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be conversion control register */
604 outb(0x0, dev->iobase + DAS800_CONV_CONTROL); /* disable hardware triggering of conversions */
605 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
608 static int das800_ai_do_cmdtest(struct comedi_device *dev,
609 struct comedi_subdevice *s,
610 struct comedi_cmd *cmd)
612 struct das800_private *devpriv = dev->private;
618 /* Step 1 : check if triggers are trivially valid */
620 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT);
621 err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
622 err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_TIMER | TRIG_EXT);
623 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
624 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
629 /* Step 2a : make sure trigger sources are unique */
631 err |= cfc_check_trigger_is_unique(cmd->start_src);
632 err |= cfc_check_trigger_is_unique(cmd->convert_src);
633 err |= cfc_check_trigger_is_unique(cmd->stop_src);
635 /* Step 2b : and mutually compatible */
640 /* step 3: make sure arguments are trivially compatible */
642 if (cmd->start_arg != 0) {
646 if (cmd->convert_src == TRIG_TIMER) {
647 if (cmd->convert_arg < thisboard->ai_speed) {
648 cmd->convert_arg = thisboard->ai_speed;
652 if (!cmd->chanlist_len) {
653 cmd->chanlist_len = 1;
656 if (cmd->scan_end_arg != cmd->chanlist_len) {
657 cmd->scan_end_arg = cmd->chanlist_len;
660 if (cmd->stop_src == TRIG_COUNT) {
661 if (!cmd->stop_arg) {
665 } else { /* TRIG_NONE */
666 if (cmd->stop_arg != 0) {
675 /* step 4: fix up any arguments */
677 if (cmd->convert_src == TRIG_TIMER) {
678 tmp = cmd->convert_arg;
679 /* calculate counter values that give desired timing */
680 i8253_cascade_ns_to_timer_2div(TIMER_BASE, &(devpriv->divisor1),
681 &(devpriv->divisor2),
683 cmd->flags & TRIG_ROUND_MASK);
684 if (tmp != cmd->convert_arg)
691 /* check channel/gain list against card's limitations */
693 gain = CR_RANGE(cmd->chanlist[0]);
694 startChan = CR_CHAN(cmd->chanlist[0]);
695 for (i = 1; i < cmd->chanlist_len; i++) {
696 if (CR_CHAN(cmd->chanlist[i]) !=
697 (startChan + i) % N_CHAN_AI) {
699 "entries in chanlist must be consecutive channels, counting upwards\n");
702 if (CR_RANGE(cmd->chanlist[i]) != gain) {
704 "entries in chanlist must all have the same gain\n");
716 static int das800_ai_do_cmd(struct comedi_device *dev,
717 struct comedi_subdevice *s)
719 struct das800_private *devpriv = dev->private;
720 int startChan, endChan, scan, gain;
722 unsigned long irq_flags;
723 struct comedi_async *async = s->async;
727 "no irq assigned for das-800, cannot do hardware conversions");
733 /* set channel scan limits */
734 startChan = CR_CHAN(async->cmd.chanlist[0]);
735 endChan = (startChan + async->cmd.chanlist_len - 1) % 8;
736 scan = (endChan << 3) | startChan;
738 spin_lock_irqsave(&dev->spinlock, irq_flags);
739 outb(SCAN_LIMITS, dev->iobase + DAS800_GAIN); /* select base address + 2 to be scan limits register */
740 outb(scan, dev->iobase + DAS800_SCAN_LIMITS); /* set scan limits */
741 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
744 gain = CR_RANGE(async->cmd.chanlist[0]);
745 if (thisboard->resolution == 12 && gain > 0)
748 outb(gain, dev->iobase + DAS800_GAIN);
750 switch (async->cmd.stop_src) {
752 devpriv->count = async->cmd.stop_arg * async->cmd.chanlist_len;
753 devpriv->forever = 0;
756 devpriv->forever = 1;
763 /* enable auto channel scan, send interrupts on end of conversion
764 * and set clock source to internal or external
767 conv_bits |= EACS | IEOC;
768 if (async->cmd.start_src == TRIG_EXT)
770 switch (async->cmd.convert_src) {
772 conv_bits |= CASC | ITE;
773 /* set conversion frequency */
774 i8253_cascade_ns_to_timer_2div(TIMER_BASE, &(devpriv->divisor1),
775 &(devpriv->divisor2),
776 &(async->cmd.convert_arg),
778 flags & TRIG_ROUND_MASK);
779 if (das800_set_frequency(dev) < 0) {
780 comedi_error(dev, "Error setting up counters");
790 spin_lock_irqsave(&dev->spinlock, irq_flags);
791 outb(CONV_CONTROL, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be conversion control register */
792 outb(conv_bits, dev->iobase + DAS800_CONV_CONTROL);
793 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
799 static int das800_ai_rinsn(struct comedi_device *dev,
800 struct comedi_subdevice *s, struct comedi_insn *insn,
803 struct das800_private *devpriv = dev->private;
809 unsigned long irq_flags;
811 disable_das800(dev); /* disable hardware conversions (enables software conversions) */
813 /* set multiplexer */
814 chan = CR_CHAN(insn->chanspec);
816 spin_lock_irqsave(&dev->spinlock, irq_flags);
817 outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
818 outb(chan | devpriv->do_bits, dev->iobase + DAS800_CONTROL1);
819 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
821 /* set gain / range */
822 range = CR_RANGE(insn->chanspec);
823 if (thisboard->resolution == 12 && range)
826 outb(range, dev->iobase + DAS800_GAIN);
830 for (n = 0; n < insn->n; n++) {
831 /* trigger conversion */
832 outb_p(0, dev->iobase + DAS800_MSB);
834 for (i = 0; i < timeout; i++) {
835 if (!(inb(dev->iobase + DAS800_STATUS) & BUSY))
839 comedi_error(dev, "timeout");
842 lsb = inb(dev->iobase + DAS800_LSB);
843 msb = inb(dev->iobase + DAS800_MSB);
844 if (thisboard->resolution == 12) {
845 data[n] = (lsb >> 4) & 0xff;
846 data[n] |= (msb << 4);
848 data[n] = (msb << 8) | lsb;
855 static int das800_di_rbits(struct comedi_device *dev,
856 struct comedi_subdevice *s, struct comedi_insn *insn,
861 bits = inb(dev->iobase + DAS800_STATUS) >> 4;
869 static int das800_do_wbits(struct comedi_device *dev,
870 struct comedi_subdevice *s, struct comedi_insn *insn,
873 struct das800_private *devpriv = dev->private;
875 unsigned long irq_flags;
877 /* only set bits that have been masked */
879 wbits = devpriv->do_bits >> 4;
881 wbits |= data[0] & data[1];
882 devpriv->do_bits = wbits << 4;
884 spin_lock_irqsave(&dev->spinlock, irq_flags);
885 outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
886 outb(devpriv->do_bits | CONTROL1_INTE, dev->iobase + DAS800_CONTROL1);
887 spin_unlock_irqrestore(&dev->spinlock, irq_flags);
894 /* loads counters with divisor1, divisor2 from private structure */
895 static int das800_set_frequency(struct comedi_device *dev)
897 struct das800_private *devpriv = dev->private;
900 if (i8254_load(dev->iobase + DAS800_8254, 0, 1, devpriv->divisor1, 2))
902 if (i8254_load(dev->iobase + DAS800_8254, 0, 2, devpriv->divisor2, 2))
910 MODULE_AUTHOR("Comedi http://www.comedi.org");
911 MODULE_DESCRIPTION("Comedi low-level driver");
912 MODULE_LICENSE("GPL");