1 // SPDX-License-Identifier: GPL-2.0+
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 * Copyright (C) 2000 Chris R. Baugher <baugher@enteract.com>
9 * Copyright (C) 2001,2002 Frank Mori Hess <fmhess@users.sourceforge.net>
14 * Description: DAS16 compatible boards
15 * Author: Sam Moore, Warren Jasper, ds, Chris Baugher, Frank Hess, Roman Fietze
16 * Devices: [Keithley Metrabyte] DAS-16 (das-16), DAS-16G (das-16g),
17 * DAS-16F (das-16f), DAS-1201 (das-1201), DAS-1202 (das-1202),
18 * DAS-1401 (das-1401), DAS-1402 (das-1402), DAS-1601 (das-1601),
19 * DAS-1602 (das-1602),
20 * [ComputerBoards] PC104-DAS16/JR (pc104-das16jr),
21 * PC104-DAS16JR/16 (pc104-das16jr/16), CIO-DAS16 (cio-das16),
22 * CIO-DAS16F (cio-das16/f), CIO-DAS16/JR (cio-das16/jr),
23 * CIO-DAS16JR/16 (cio-das16jr/16), CIO-DAS1401/12 (cio-das1401/12),
24 * CIO-DAS1402/12 (cio-das1402/12), CIO-DAS1402/16 (cio-das1402/16),
25 * CIO-DAS1601/12 (cio-das1601/12), CIO-DAS1602/12 (cio-das1602/12),
26 * CIO-DAS1602/16 (cio-das1602/16), CIO-DAS16/330 (cio-das16/330)
30 * A rewrite of the das16 and das1600 drivers.
33 * [0] - base io address
34 * [1] - irq (does nothing, irq is not used anymore)
35 * [2] - dma channel (optional, required for comedi_command support)
36 * [3] - master clock speed in MHz (optional, 1 or 10, ignored if
37 * board can probe clock, defaults to 1)
38 * [4] - analog input range lowest voltage in microvolts (optional,
39 * only useful if your board does not have software
41 * [5] - analog input range highest voltage in microvolts (optional,
42 * only useful if board does not have software programmable
44 * [6] - analog output range lowest voltage in microvolts (optional)
45 * [7] - analog output range highest voltage in microvolts (optional)
47 * Passing a zero for an option is the same as leaving it unspecified.
51 * Testing and debugging help provided by Daniel Koch.
55 * 4919.PDF (das1400, 1600)
57 * 4923.PDF (das1200, 1400, 1600)
59 * Computer boards manuals also available from their website
60 * www.measurementcomputing.com
63 #include <linux/module.h>
64 #include <linux/slab.h>
65 #include <linux/interrupt.h>
67 #include "../comedidev.h"
69 #include "comedi_isadma.h"
70 #include "comedi_8254.h"
73 #define DAS16_DMA_SIZE 0xff00 /* size in bytes of allocated dma buffer */
78 #define DAS16_TRIG_REG 0x00
79 #define DAS16_AI_LSB_REG 0x00
80 #define DAS16_AI_MSB_REG 0x01
81 #define DAS16_MUX_REG 0x02
82 #define DAS16_DIO_REG 0x03
83 #define DAS16_AO_LSB_REG(x) ((x) ? 0x06 : 0x04)
84 #define DAS16_AO_MSB_REG(x) ((x) ? 0x07 : 0x05)
85 #define DAS16_STATUS_REG 0x08
86 #define DAS16_STATUS_BUSY BIT(7)
87 #define DAS16_STATUS_UNIPOLAR BIT(6)
88 #define DAS16_STATUS_MUXBIT BIT(5)
89 #define DAS16_STATUS_INT BIT(4)
90 #define DAS16_CTRL_REG 0x09
91 #define DAS16_CTRL_INTE BIT(7)
92 #define DAS16_CTRL_IRQ(x) (((x) & 0x7) << 4)
93 #define DAS16_CTRL_DMAE BIT(2)
94 #define DAS16_CTRL_PACING_MASK (3 << 0)
95 #define DAS16_CTRL_INT_PACER (3 << 0)
96 #define DAS16_CTRL_EXT_PACER (2 << 0)
97 #define DAS16_CTRL_SOFT_PACER (0 << 0)
98 #define DAS16_PACER_REG 0x0a
99 #define DAS16_PACER_BURST_LEN(x) (((x) & 0xf) << 4)
100 #define DAS16_PACER_CTR0 BIT(1)
101 #define DAS16_PACER_TRIG0 BIT(0)
102 #define DAS16_GAIN_REG 0x0b
103 #define DAS16_TIMER_BASE_REG 0x0c /* to 0x0f */
105 #define DAS1600_CONV_REG 0x404
106 #define DAS1600_CONV_DISABLE BIT(6)
107 #define DAS1600_BURST_REG 0x405
108 #define DAS1600_BURST_VAL BIT(6)
109 #define DAS1600_ENABLE_REG 0x406
110 #define DAS1600_ENABLE_VAL BIT(6)
111 #define DAS1600_STATUS_REG 0x407
112 #define DAS1600_STATUS_BME BIT(6)
113 #define DAS1600_STATUS_ME BIT(5)
114 #define DAS1600_STATUS_CD BIT(4)
115 #define DAS1600_STATUS_WS BIT(1)
116 #define DAS1600_STATUS_CLK_10MHZ BIT(0)
118 static const struct comedi_lrange range_das1x01_bip = {
127 static const struct comedi_lrange range_das1x01_unip = {
136 static const struct comedi_lrange range_das1x02_bip = {
145 static const struct comedi_lrange range_das1x02_unip = {
154 static const struct comedi_lrange range_das16jr = {
168 static const struct comedi_lrange range_das16jr_16 = {
181 static const int das16jr_gainlist[] = { 8, 0, 1, 2, 3, 4, 5, 6, 7 };
182 static const int das16jr_16_gainlist[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
183 static const int das1600_gainlist[] = { 0, 1, 2, 3 };
193 static const int *const das16_gainlists[] = {
201 static const struct comedi_lrange *const das16_ai_uni_lranges[] = {
209 static const struct comedi_lrange *const das16_ai_bip_lranges[] = {
219 unsigned int ai_maxdata;
220 unsigned int ai_speed; /* max conversion speed in nanosec */
222 unsigned int has_ao:1;
223 unsigned int has_8255:1;
225 unsigned int i8255_offset;
231 static const struct das16_board das16_boards[] = {
234 .ai_maxdata = 0x0fff,
236 .ai_pg = das16_pg_none,
239 .i8255_offset = 0x10,
244 .ai_maxdata = 0x0fff,
246 .ai_pg = das16_pg_none,
249 .i8255_offset = 0x10,
254 .ai_maxdata = 0x0fff,
256 .ai_pg = das16_pg_none,
259 .i8255_offset = 0x10,
264 .ai_maxdata = 0x0fff,
266 .ai_pg = das16_pg_none,
269 .i8255_offset = 0x10,
273 .name = "cio-das16/f",
274 .ai_maxdata = 0x0fff,
276 .ai_pg = das16_pg_none,
279 .i8255_offset = 0x10,
283 .name = "cio-das16/jr",
284 .ai_maxdata = 0x0fff,
286 .ai_pg = das16_pg_16jr,
290 .name = "pc104-das16jr",
291 .ai_maxdata = 0x0fff,
293 .ai_pg = das16_pg_16jr,
297 .name = "cio-das16jr/16",
298 .ai_maxdata = 0xffff,
300 .ai_pg = das16_pg_16jr_16,
304 .name = "pc104-das16jr/16",
305 .ai_maxdata = 0xffff,
307 .ai_pg = das16_pg_16jr_16,
312 .ai_maxdata = 0x0fff,
314 .ai_pg = das16_pg_none,
316 .i8255_offset = 0x400,
321 .ai_maxdata = 0x0fff,
323 .ai_pg = das16_pg_none,
325 .i8255_offset = 0x400,
330 .ai_maxdata = 0x0fff,
332 .ai_pg = das16_pg_1601,
337 .ai_maxdata = 0x0fff,
339 .ai_pg = das16_pg_1602,
344 .ai_maxdata = 0x0fff,
346 .ai_pg = das16_pg_1601,
349 .i8255_offset = 0x400,
354 .ai_maxdata = 0x0fff,
356 .ai_pg = das16_pg_1602,
359 .i8255_offset = 0x400,
363 .name = "cio-das1401/12",
364 .ai_maxdata = 0x0fff,
366 .ai_pg = das16_pg_1601,
370 .name = "cio-das1402/12",
371 .ai_maxdata = 0x0fff,
373 .ai_pg = das16_pg_1602,
377 .name = "cio-das1402/16",
378 .ai_maxdata = 0xffff,
380 .ai_pg = das16_pg_1602,
384 .name = "cio-das1601/12",
385 .ai_maxdata = 0x0fff,
387 .ai_pg = das16_pg_1601,
390 .i8255_offset = 0x400,
394 .name = "cio-das1602/12",
395 .ai_maxdata = 0x0fff,
397 .ai_pg = das16_pg_1602,
400 .i8255_offset = 0x400,
404 .name = "cio-das1602/16",
405 .ai_maxdata = 0xffff,
407 .ai_pg = das16_pg_1602,
410 .i8255_offset = 0x400,
414 .name = "cio-das16/330",
415 .ai_maxdata = 0x0fff,
417 .ai_pg = das16_pg_16jr,
424 * Period for timer interrupt in jiffies. It's a function
425 * to deal with possibility of dynamic HZ patches
427 static inline int timer_period(void)
432 struct das16_private_struct {
433 struct comedi_isadma *dma;
434 struct comedi_device *dev;
435 unsigned int clockbase;
436 unsigned int ctrl_reg;
437 unsigned int divisor1;
438 unsigned int divisor2;
439 struct timer_list timer;
440 unsigned long extra_iobase;
441 unsigned int can_burst:1;
442 unsigned int timer_running:1;
445 static void das16_ai_setup_dma(struct comedi_device *dev,
446 struct comedi_subdevice *s,
447 unsigned int unread_samples)
449 struct das16_private_struct *devpriv = dev->private;
450 struct comedi_isadma *dma = devpriv->dma;
451 struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
452 unsigned int max_samples = comedi_bytes_to_samples(s, desc->maxsize);
453 unsigned int nsamples;
456 * Determine dma size based on the buffer size plus the number of
457 * unread samples and the number of samples remaining in the command.
459 nsamples = comedi_nsamples_left(s, max_samples + unread_samples);
460 if (nsamples > unread_samples) {
461 nsamples -= unread_samples;
462 desc->size = comedi_samples_to_bytes(s, nsamples);
463 comedi_isadma_program(desc);
467 static void das16_interrupt(struct comedi_device *dev)
469 struct das16_private_struct *devpriv = dev->private;
470 struct comedi_subdevice *s = dev->read_subdev;
471 struct comedi_async *async = s->async;
472 struct comedi_cmd *cmd = &async->cmd;
473 struct comedi_isadma *dma = devpriv->dma;
474 struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
475 unsigned long spin_flags;
476 unsigned int residue;
478 unsigned int nsamples;
480 spin_lock_irqsave(&dev->spinlock, spin_flags);
481 if (!(devpriv->ctrl_reg & DAS16_CTRL_DMAE)) {
482 spin_unlock_irqrestore(&dev->spinlock, spin_flags);
487 * The pc104-das16jr (at least) has problems if the dma
488 * transfer is interrupted in the middle of transferring
491 residue = comedi_isadma_disable_on_sample(desc->chan,
492 comedi_bytes_per_sample(s));
494 /* figure out how many samples to read */
495 if (residue > desc->size) {
496 dev_err(dev->class_dev, "residue > transfer size!\n");
497 async->events |= COMEDI_CB_ERROR;
500 nbytes = desc->size - residue;
502 nsamples = comedi_bytes_to_samples(s, nbytes);
504 /* restart DMA if more samples are needed */
506 dma->cur_dma = 1 - dma->cur_dma;
507 das16_ai_setup_dma(dev, s, nsamples);
510 spin_unlock_irqrestore(&dev->spinlock, spin_flags);
512 comedi_buf_write_samples(s, desc->virt_addr, nsamples);
514 if (cmd->stop_src == TRIG_COUNT && async->scans_done >= cmd->stop_arg)
515 async->events |= COMEDI_CB_EOA;
517 comedi_handle_events(dev, s);
520 static void das16_timer_interrupt(struct timer_list *t)
522 struct das16_private_struct *devpriv = from_timer(devpriv, t, timer);
523 struct comedi_device *dev = devpriv->dev;
526 das16_interrupt(dev);
528 spin_lock_irqsave(&dev->spinlock, flags);
529 if (devpriv->timer_running)
530 mod_timer(&devpriv->timer, jiffies + timer_period());
531 spin_unlock_irqrestore(&dev->spinlock, flags);
534 static void das16_ai_set_mux_range(struct comedi_device *dev,
535 unsigned int first_chan,
536 unsigned int last_chan,
539 const struct das16_board *board = dev->board_ptr;
541 /* set multiplexer */
542 outb(first_chan | (last_chan << 4), dev->iobase + DAS16_MUX_REG);
544 /* some boards do not have programmable gain */
545 if (board->ai_pg == das16_pg_none)
549 * Set gain (this is also burst rate register but according to
550 * computer boards manual, burst rate does nothing, even on
553 outb((das16_gainlists[board->ai_pg])[range],
554 dev->iobase + DAS16_GAIN_REG);
557 static int das16_ai_check_chanlist(struct comedi_device *dev,
558 struct comedi_subdevice *s,
559 struct comedi_cmd *cmd)
561 unsigned int chan0 = CR_CHAN(cmd->chanlist[0]);
562 unsigned int range0 = CR_RANGE(cmd->chanlist[0]);
565 for (i = 1; i < cmd->chanlist_len; i++) {
566 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
567 unsigned int range = CR_RANGE(cmd->chanlist[i]);
569 if (chan != ((chan0 + i) % s->n_chan)) {
570 dev_dbg(dev->class_dev,
571 "entries in chanlist must be consecutive channels, counting upwards\n");
575 if (range != range0) {
576 dev_dbg(dev->class_dev,
577 "entries in chanlist must all have the same gain\n");
585 static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
586 struct comedi_cmd *cmd)
588 const struct das16_board *board = dev->board_ptr;
589 struct das16_private_struct *devpriv = dev->private;
591 unsigned int trig_mask;
594 /* Step 1 : check if triggers are trivially valid */
596 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
598 trig_mask = TRIG_FOLLOW;
599 if (devpriv->can_burst)
600 trig_mask |= TRIG_TIMER | TRIG_EXT;
601 err |= comedi_check_trigger_src(&cmd->scan_begin_src, trig_mask);
603 trig_mask = TRIG_TIMER | TRIG_EXT;
604 if (devpriv->can_burst)
605 trig_mask |= TRIG_NOW;
606 err |= comedi_check_trigger_src(&cmd->convert_src, trig_mask);
608 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
609 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
614 /* Step 2a : make sure trigger sources are unique */
616 err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
617 err |= comedi_check_trigger_is_unique(cmd->convert_src);
618 err |= comedi_check_trigger_is_unique(cmd->stop_src);
620 /* Step 2b : and mutually compatible */
622 /* make sure scan_begin_src and convert_src don't conflict */
623 if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW)
625 if (cmd->scan_begin_src != TRIG_FOLLOW && cmd->convert_src != TRIG_NOW)
631 /* Step 3: check if arguments are trivially valid */
633 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
635 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
636 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
638 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
641 /* check against maximum frequency */
642 if (cmd->scan_begin_src == TRIG_TIMER) {
643 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
648 if (cmd->convert_src == TRIG_TIMER) {
649 err |= comedi_check_trigger_arg_min(&cmd->convert_arg,
653 if (cmd->stop_src == TRIG_COUNT)
654 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
656 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
661 /* step 4: fix up arguments */
662 if (cmd->scan_begin_src == TRIG_TIMER) {
663 arg = cmd->scan_begin_arg;
664 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
665 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
667 if (cmd->convert_src == TRIG_TIMER) {
668 arg = cmd->convert_arg;
669 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
670 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
675 /* Step 5: check channel list if it exists */
676 if (cmd->chanlist && cmd->chanlist_len > 0)
677 err |= das16_ai_check_chanlist(dev, s, cmd);
685 static unsigned int das16_set_pacer(struct comedi_device *dev, unsigned int ns,
688 comedi_8254_cascade_ns_to_timer(dev->pacer, &ns, flags);
689 comedi_8254_update_divisors(dev->pacer);
690 comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
695 static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s)
697 struct das16_private_struct *devpriv = dev->private;
698 struct comedi_isadma *dma = devpriv->dma;
699 struct comedi_async *async = s->async;
700 struct comedi_cmd *cmd = &async->cmd;
701 unsigned int first_chan = CR_CHAN(cmd->chanlist[0]);
702 unsigned int last_chan = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]);
703 unsigned int range = CR_RANGE(cmd->chanlist[0]);
707 if (cmd->flags & CMDF_PRIORITY) {
708 dev_err(dev->class_dev,
709 "isa dma transfers cannot be performed with CMDF_PRIORITY, aborting\n");
713 if (devpriv->can_burst)
714 outb(DAS1600_CONV_DISABLE, dev->iobase + DAS1600_CONV_REG);
716 /* set mux and range for chanlist scan */
717 das16_ai_set_mux_range(dev, first_chan, last_chan, range);
719 /* set counter mode and counts */
720 cmd->convert_arg = das16_set_pacer(dev, cmd->convert_arg, cmd->flags);
722 /* enable counters */
724 if (devpriv->can_burst) {
725 if (cmd->convert_src == TRIG_NOW) {
726 outb(DAS1600_BURST_VAL,
727 dev->iobase + DAS1600_BURST_REG);
728 /* set burst length */
729 byte |= DAS16_PACER_BURST_LEN(cmd->chanlist_len - 1);
731 outb(0, dev->iobase + DAS1600_BURST_REG);
734 outb(byte, dev->iobase + DAS16_PACER_REG);
736 /* set up dma transfer */
738 das16_ai_setup_dma(dev, s, 0);
741 spin_lock_irqsave(&dev->spinlock, flags);
742 devpriv->timer_running = 1;
743 devpriv->timer.expires = jiffies + timer_period();
744 add_timer(&devpriv->timer);
746 /* enable DMA interrupt with external or internal pacing */
747 devpriv->ctrl_reg &= ~(DAS16_CTRL_INTE | DAS16_CTRL_PACING_MASK);
748 devpriv->ctrl_reg |= DAS16_CTRL_DMAE;
749 if (cmd->convert_src == TRIG_EXT)
750 devpriv->ctrl_reg |= DAS16_CTRL_EXT_PACER;
752 devpriv->ctrl_reg |= DAS16_CTRL_INT_PACER;
753 outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG);
755 if (devpriv->can_burst)
756 outb(0, dev->iobase + DAS1600_CONV_REG);
757 spin_unlock_irqrestore(&dev->spinlock, flags);
762 static int das16_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
764 struct das16_private_struct *devpriv = dev->private;
765 struct comedi_isadma *dma = devpriv->dma;
768 spin_lock_irqsave(&dev->spinlock, flags);
770 /* disable interrupts, dma and pacer clocked conversions */
771 devpriv->ctrl_reg &= ~(DAS16_CTRL_INTE | DAS16_CTRL_DMAE |
772 DAS16_CTRL_PACING_MASK);
773 outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG);
775 comedi_isadma_disable(dma->chan);
777 /* disable SW timer */
778 if (devpriv->timer_running) {
779 devpriv->timer_running = 0;
780 del_timer(&devpriv->timer);
783 if (devpriv->can_burst)
784 outb(0, dev->iobase + DAS1600_BURST_REG);
786 spin_unlock_irqrestore(&dev->spinlock, flags);
791 static void das16_ai_munge(struct comedi_device *dev,
792 struct comedi_subdevice *s, void *array,
793 unsigned int num_bytes,
794 unsigned int start_chan_index)
796 unsigned short *data = array;
797 unsigned int num_samples = comedi_bytes_to_samples(s, num_bytes);
801 for (i = 0; i < num_samples; i++) {
802 data[i] = le16_to_cpu(buf[i]);
803 if (s->maxdata == 0x0fff)
805 data[i] &= s->maxdata;
809 static int das16_ai_eoc(struct comedi_device *dev,
810 struct comedi_subdevice *s,
811 struct comedi_insn *insn,
812 unsigned long context)
816 status = inb(dev->iobase + DAS16_STATUS_REG);
817 if ((status & DAS16_STATUS_BUSY) == 0)
822 static int das16_ai_insn_read(struct comedi_device *dev,
823 struct comedi_subdevice *s,
824 struct comedi_insn *insn,
827 unsigned int chan = CR_CHAN(insn->chanspec);
828 unsigned int range = CR_RANGE(insn->chanspec);
833 /* set mux and range for single channel */
834 das16_ai_set_mux_range(dev, chan, chan, range);
836 for (i = 0; i < insn->n; i++) {
837 /* trigger conversion */
838 outb_p(0, dev->iobase + DAS16_TRIG_REG);
840 ret = comedi_timeout(dev, s, insn, das16_ai_eoc, 0);
844 val = inb(dev->iobase + DAS16_AI_MSB_REG) << 8;
845 val |= inb(dev->iobase + DAS16_AI_LSB_REG);
846 if (s->maxdata == 0x0fff)
856 static int das16_ao_insn_write(struct comedi_device *dev,
857 struct comedi_subdevice *s,
858 struct comedi_insn *insn,
861 unsigned int chan = CR_CHAN(insn->chanspec);
864 for (i = 0; i < insn->n; i++) {
865 unsigned int val = data[i];
867 s->readback[chan] = val;
871 outb(val & 0xff, dev->iobase + DAS16_AO_LSB_REG(chan));
872 outb((val >> 8) & 0xff, dev->iobase + DAS16_AO_MSB_REG(chan));
878 static int das16_di_insn_bits(struct comedi_device *dev,
879 struct comedi_subdevice *s,
880 struct comedi_insn *insn,
883 data[1] = inb(dev->iobase + DAS16_DIO_REG) & 0xf;
888 static int das16_do_insn_bits(struct comedi_device *dev,
889 struct comedi_subdevice *s,
890 struct comedi_insn *insn,
893 if (comedi_dio_update_state(s, data))
894 outb(s->state, dev->iobase + DAS16_DIO_REG);
901 static int das16_probe(struct comedi_device *dev, struct comedi_devconfig *it)
903 const struct das16_board *board = dev->board_ptr;
906 /* diobits indicates boards */
907 diobits = inb(dev->iobase + DAS16_DIO_REG) & 0xf0;
908 if (board->id != diobits) {
909 dev_err(dev->class_dev,
910 "requested board's id bits are incorrect (0x%x != 0x%x)\n",
918 static void das16_reset(struct comedi_device *dev)
920 outb(0, dev->iobase + DAS16_STATUS_REG);
921 outb(0, dev->iobase + DAS16_CTRL_REG);
922 outb(0, dev->iobase + DAS16_PACER_REG);
925 static void das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan)
927 struct das16_private_struct *devpriv = dev->private;
929 timer_setup(&devpriv->timer, das16_timer_interrupt, 0);
931 /* only DMA channels 3 and 1 are valid */
932 if (!(dma_chan == 1 || dma_chan == 3))
935 /* DMA uses two buffers */
936 devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan,
937 DAS16_DMA_SIZE, COMEDI_ISADMA_READ);
940 static void das16_free_dma(struct comedi_device *dev)
942 struct das16_private_struct *devpriv = dev->private;
945 del_timer_sync(&devpriv->timer);
946 comedi_isadma_free(devpriv->dma);
950 static const struct comedi_lrange *das16_ai_range(struct comedi_device *dev,
951 struct comedi_subdevice *s,
952 struct comedi_devconfig *it,
953 unsigned int pg_type,
956 unsigned int min = it->options[4];
957 unsigned int max = it->options[5];
959 /* get any user-defined input range */
960 if (pg_type == das16_pg_none && (min || max)) {
961 struct comedi_lrange *lrange;
962 struct comedi_krange *krange;
964 /* allocate single-range range table */
965 lrange = comedi_alloc_spriv(s,
966 sizeof(*lrange) + sizeof(*krange));
968 return &range_unknown;
970 /* initialize ai range */
972 krange = lrange->range;
975 krange->flags = UNIT_volt;
980 /* use software programmable range */
981 if (status & DAS16_STATUS_UNIPOLAR)
982 return das16_ai_uni_lranges[pg_type];
983 return das16_ai_bip_lranges[pg_type];
986 static const struct comedi_lrange *das16_ao_range(struct comedi_device *dev,
987 struct comedi_subdevice *s,
988 struct comedi_devconfig *it)
990 unsigned int min = it->options[6];
991 unsigned int max = it->options[7];
993 /* get any user-defined output range */
995 struct comedi_lrange *lrange;
996 struct comedi_krange *krange;
998 /* allocate single-range range table */
999 lrange = comedi_alloc_spriv(s,
1000 sizeof(*lrange) + sizeof(*krange));
1002 return &range_unknown;
1004 /* initialize ao range */
1006 krange = lrange->range;
1009 krange->flags = UNIT_volt;
1014 return &range_unknown;
1017 static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1019 const struct das16_board *board = dev->board_ptr;
1020 struct das16_private_struct *devpriv;
1021 struct comedi_subdevice *s;
1022 unsigned int osc_base;
1023 unsigned int status;
1026 /* check that clock setting is valid */
1027 if (it->options[3]) {
1028 if (it->options[3] != 1 && it->options[3] != 10) {
1029 dev_err(dev->class_dev,
1030 "Invalid option. Master clock must be set to 1 or 10 (MHz)\n");
1035 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1040 if (board->size < 0x400) {
1041 ret = comedi_request_region(dev, it->options[0], board->size);
1045 ret = comedi_request_region(dev, it->options[0], 0x10);
1048 /* Request an additional region for the 8255 */
1049 ret = __comedi_request_region(dev, dev->iobase + 0x400,
1050 board->size & 0x3ff);
1053 devpriv->extra_iobase = dev->iobase + 0x400;
1054 devpriv->can_burst = 1;
1057 /* probe id bits to make sure they are consistent */
1058 if (das16_probe(dev, it))
1061 /* get master clock speed */
1062 osc_base = I8254_OSC_BASE_1MHZ;
1063 if (devpriv->can_burst) {
1064 status = inb(dev->iobase + DAS1600_STATUS_REG);
1065 if (status & DAS1600_STATUS_CLK_10MHZ)
1066 osc_base = I8254_OSC_BASE_10MHZ;
1069 osc_base = I8254_OSC_BASE_1MHZ / it->options[3];
1072 dev->pacer = comedi_8254_init(dev->iobase + DAS16_TIMER_BASE_REG,
1073 osc_base, I8254_IO8, 0);
1077 das16_alloc_dma(dev, it->options[2]);
1079 ret = comedi_alloc_subdevices(dev, 4 + board->has_8255);
1083 status = inb(dev->iobase + DAS16_STATUS_REG);
1085 /* Analog Input subdevice */
1086 s = &dev->subdevices[0];
1087 s->type = COMEDI_SUBD_AI;
1088 s->subdev_flags = SDF_READABLE;
1089 if (status & DAS16_STATUS_MUXBIT) {
1090 s->subdev_flags |= SDF_GROUND;
1093 s->subdev_flags |= SDF_DIFF;
1096 s->len_chanlist = s->n_chan;
1097 s->maxdata = board->ai_maxdata;
1098 s->range_table = das16_ai_range(dev, s, it, board->ai_pg, status);
1099 s->insn_read = das16_ai_insn_read;
1101 dev->read_subdev = s;
1102 s->subdev_flags |= SDF_CMD_READ;
1103 s->do_cmdtest = das16_cmd_test;
1104 s->do_cmd = das16_cmd_exec;
1105 s->cancel = das16_cancel;
1106 s->munge = das16_ai_munge;
1109 /* Analog Output subdevice */
1110 s = &dev->subdevices[1];
1111 if (board->has_ao) {
1112 s->type = COMEDI_SUBD_AO;
1113 s->subdev_flags = SDF_WRITABLE;
1115 s->maxdata = 0x0fff;
1116 s->range_table = das16_ao_range(dev, s, it);
1117 s->insn_write = das16_ao_insn_write;
1119 ret = comedi_alloc_subdev_readback(s);
1123 s->type = COMEDI_SUBD_UNUSED;
1126 /* Digital Input subdevice */
1127 s = &dev->subdevices[2];
1128 s->type = COMEDI_SUBD_DI;
1129 s->subdev_flags = SDF_READABLE;
1132 s->range_table = &range_digital;
1133 s->insn_bits = das16_di_insn_bits;
1135 /* Digital Output subdevice */
1136 s = &dev->subdevices[3];
1137 s->type = COMEDI_SUBD_DO;
1138 s->subdev_flags = SDF_WRITABLE;
1141 s->range_table = &range_digital;
1142 s->insn_bits = das16_do_insn_bits;
1144 /* initialize digital output lines */
1145 outb(s->state, dev->iobase + DAS16_DIO_REG);
1147 /* 8255 Digital I/O subdevice */
1148 if (board->has_8255) {
1149 s = &dev->subdevices[4];
1150 ret = subdev_8255_init(dev, s, NULL, board->i8255_offset);
1156 /* set the interrupt level */
1157 devpriv->ctrl_reg = DAS16_CTRL_IRQ(dev->irq);
1158 outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG);
1160 if (devpriv->can_burst) {
1161 outb(DAS1600_ENABLE_VAL, dev->iobase + DAS1600_ENABLE_REG);
1162 outb(0, dev->iobase + DAS1600_CONV_REG);
1163 outb(0, dev->iobase + DAS1600_BURST_REG);
1169 static void das16_detach(struct comedi_device *dev)
1171 const struct das16_board *board = dev->board_ptr;
1172 struct das16_private_struct *devpriv = dev->private;
1177 das16_free_dma(dev);
1179 if (devpriv->extra_iobase)
1180 release_region(devpriv->extra_iobase,
1181 board->size & 0x3ff);
1184 comedi_legacy_detach(dev);
1187 static struct comedi_driver das16_driver = {
1188 .driver_name = "das16",
1189 .module = THIS_MODULE,
1190 .attach = das16_attach,
1191 .detach = das16_detach,
1192 .board_name = &das16_boards[0].name,
1193 .num_names = ARRAY_SIZE(das16_boards),
1194 .offset = sizeof(das16_boards[0]),
1196 module_comedi_driver(das16_driver);
1198 MODULE_AUTHOR("Comedi https://www.comedi.org");
1199 MODULE_DESCRIPTION("Comedi driver for DAS16 compatible boards");
1200 MODULE_LICENSE("GPL");