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>
66 #include <linux/comedi/comedidev.h>
67 #include <linux/comedi/comedi_8255.h>
68 #include <linux/comedi/comedi_8254.h>
69 #include <linux/comedi/comedi_isadma.h>
71 #define DAS16_DMA_SIZE 0xff00 /* size in bytes of allocated dma buffer */
76 #define DAS16_TRIG_REG 0x00
77 #define DAS16_AI_LSB_REG 0x00
78 #define DAS16_AI_MSB_REG 0x01
79 #define DAS16_MUX_REG 0x02
80 #define DAS16_DIO_REG 0x03
81 #define DAS16_AO_LSB_REG(x) ((x) ? 0x06 : 0x04)
82 #define DAS16_AO_MSB_REG(x) ((x) ? 0x07 : 0x05)
83 #define DAS16_STATUS_REG 0x08
84 #define DAS16_STATUS_BUSY BIT(7)
85 #define DAS16_STATUS_UNIPOLAR BIT(6)
86 #define DAS16_STATUS_MUXBIT BIT(5)
87 #define DAS16_STATUS_INT BIT(4)
88 #define DAS16_CTRL_REG 0x09
89 #define DAS16_CTRL_INTE BIT(7)
90 #define DAS16_CTRL_IRQ(x) (((x) & 0x7) << 4)
91 #define DAS16_CTRL_DMAE BIT(2)
92 #define DAS16_CTRL_PACING_MASK (3 << 0)
93 #define DAS16_CTRL_INT_PACER (3 << 0)
94 #define DAS16_CTRL_EXT_PACER (2 << 0)
95 #define DAS16_CTRL_SOFT_PACER (0 << 0)
96 #define DAS16_PACER_REG 0x0a
97 #define DAS16_PACER_BURST_LEN(x) (((x) & 0xf) << 4)
98 #define DAS16_PACER_CTR0 BIT(1)
99 #define DAS16_PACER_TRIG0 BIT(0)
100 #define DAS16_GAIN_REG 0x0b
101 #define DAS16_TIMER_BASE_REG 0x0c /* to 0x0f */
103 #define DAS1600_CONV_REG 0x404
104 #define DAS1600_CONV_DISABLE BIT(6)
105 #define DAS1600_BURST_REG 0x405
106 #define DAS1600_BURST_VAL BIT(6)
107 #define DAS1600_ENABLE_REG 0x406
108 #define DAS1600_ENABLE_VAL BIT(6)
109 #define DAS1600_STATUS_REG 0x407
110 #define DAS1600_STATUS_BME BIT(6)
111 #define DAS1600_STATUS_ME BIT(5)
112 #define DAS1600_STATUS_CD BIT(4)
113 #define DAS1600_STATUS_WS BIT(1)
114 #define DAS1600_STATUS_CLK_10MHZ BIT(0)
116 static const struct comedi_lrange range_das1x01_bip = {
125 static const struct comedi_lrange range_das1x01_unip = {
134 static const struct comedi_lrange range_das1x02_bip = {
143 static const struct comedi_lrange range_das1x02_unip = {
152 static const struct comedi_lrange range_das16jr = {
166 static const struct comedi_lrange range_das16jr_16 = {
179 static const int das16jr_gainlist[] = { 8, 0, 1, 2, 3, 4, 5, 6, 7 };
180 static const int das16jr_16_gainlist[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
181 static const int das1600_gainlist[] = { 0, 1, 2, 3 };
191 static const int *const das16_gainlists[] = {
199 static const struct comedi_lrange *const das16_ai_uni_lranges[] = {
207 static const struct comedi_lrange *const das16_ai_bip_lranges[] = {
217 unsigned int ai_maxdata;
218 unsigned int ai_speed; /* max conversion speed in nanosec */
220 unsigned int has_ao:1;
221 unsigned int has_8255:1;
223 unsigned int i8255_offset;
229 static const struct das16_board das16_boards[] = {
232 .ai_maxdata = 0x0fff,
234 .ai_pg = das16_pg_none,
237 .i8255_offset = 0x10,
242 .ai_maxdata = 0x0fff,
244 .ai_pg = das16_pg_none,
247 .i8255_offset = 0x10,
252 .ai_maxdata = 0x0fff,
254 .ai_pg = das16_pg_none,
257 .i8255_offset = 0x10,
262 .ai_maxdata = 0x0fff,
264 .ai_pg = das16_pg_none,
267 .i8255_offset = 0x10,
271 .name = "cio-das16/f",
272 .ai_maxdata = 0x0fff,
274 .ai_pg = das16_pg_none,
277 .i8255_offset = 0x10,
281 .name = "cio-das16/jr",
282 .ai_maxdata = 0x0fff,
284 .ai_pg = das16_pg_16jr,
288 .name = "pc104-das16jr",
289 .ai_maxdata = 0x0fff,
291 .ai_pg = das16_pg_16jr,
295 .name = "cio-das16jr/16",
296 .ai_maxdata = 0xffff,
298 .ai_pg = das16_pg_16jr_16,
302 .name = "pc104-das16jr/16",
303 .ai_maxdata = 0xffff,
305 .ai_pg = das16_pg_16jr_16,
310 .ai_maxdata = 0x0fff,
312 .ai_pg = das16_pg_none,
314 .i8255_offset = 0x400,
319 .ai_maxdata = 0x0fff,
321 .ai_pg = das16_pg_none,
323 .i8255_offset = 0x400,
328 .ai_maxdata = 0x0fff,
330 .ai_pg = das16_pg_1601,
335 .ai_maxdata = 0x0fff,
337 .ai_pg = das16_pg_1602,
342 .ai_maxdata = 0x0fff,
344 .ai_pg = das16_pg_1601,
347 .i8255_offset = 0x400,
352 .ai_maxdata = 0x0fff,
354 .ai_pg = das16_pg_1602,
357 .i8255_offset = 0x400,
361 .name = "cio-das1401/12",
362 .ai_maxdata = 0x0fff,
364 .ai_pg = das16_pg_1601,
368 .name = "cio-das1402/12",
369 .ai_maxdata = 0x0fff,
371 .ai_pg = das16_pg_1602,
375 .name = "cio-das1402/16",
376 .ai_maxdata = 0xffff,
378 .ai_pg = das16_pg_1602,
382 .name = "cio-das1601/12",
383 .ai_maxdata = 0x0fff,
385 .ai_pg = das16_pg_1601,
388 .i8255_offset = 0x400,
392 .name = "cio-das1602/12",
393 .ai_maxdata = 0x0fff,
395 .ai_pg = das16_pg_1602,
398 .i8255_offset = 0x400,
402 .name = "cio-das1602/16",
403 .ai_maxdata = 0xffff,
405 .ai_pg = das16_pg_1602,
408 .i8255_offset = 0x400,
412 .name = "cio-das16/330",
413 .ai_maxdata = 0x0fff,
415 .ai_pg = das16_pg_16jr,
422 * Period for timer interrupt in jiffies. It's a function
423 * to deal with possibility of dynamic HZ patches
425 static inline int timer_period(void)
430 struct das16_private_struct {
431 struct comedi_isadma *dma;
432 struct comedi_device *dev;
433 unsigned int clockbase;
434 unsigned int ctrl_reg;
435 unsigned int divisor1;
436 unsigned int divisor2;
437 struct timer_list timer;
438 unsigned long extra_iobase;
439 unsigned int can_burst:1;
440 unsigned int timer_running:1;
443 static void das16_ai_setup_dma(struct comedi_device *dev,
444 struct comedi_subdevice *s,
445 unsigned int unread_samples)
447 struct das16_private_struct *devpriv = dev->private;
448 struct comedi_isadma *dma = devpriv->dma;
449 struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
450 unsigned int max_samples = comedi_bytes_to_samples(s, desc->maxsize);
451 unsigned int nsamples;
454 * Determine dma size based on the buffer size plus the number of
455 * unread samples and the number of samples remaining in the command.
457 nsamples = comedi_nsamples_left(s, max_samples + unread_samples);
458 if (nsamples > unread_samples) {
459 nsamples -= unread_samples;
460 desc->size = comedi_samples_to_bytes(s, nsamples);
461 comedi_isadma_program(desc);
465 static void das16_interrupt(struct comedi_device *dev)
467 struct das16_private_struct *devpriv = dev->private;
468 struct comedi_subdevice *s = dev->read_subdev;
469 struct comedi_async *async = s->async;
470 struct comedi_cmd *cmd = &async->cmd;
471 struct comedi_isadma *dma = devpriv->dma;
472 struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
473 unsigned long spin_flags;
474 unsigned int residue;
476 unsigned int nsamples;
478 spin_lock_irqsave(&dev->spinlock, spin_flags);
479 if (!(devpriv->ctrl_reg & DAS16_CTRL_DMAE)) {
480 spin_unlock_irqrestore(&dev->spinlock, spin_flags);
485 * The pc104-das16jr (at least) has problems if the dma
486 * transfer is interrupted in the middle of transferring
489 residue = comedi_isadma_disable_on_sample(desc->chan,
490 comedi_bytes_per_sample(s));
492 /* figure out how many samples to read */
493 if (residue > desc->size) {
494 dev_err(dev->class_dev, "residue > transfer size!\n");
495 async->events |= COMEDI_CB_ERROR;
498 nbytes = desc->size - residue;
500 nsamples = comedi_bytes_to_samples(s, nbytes);
502 /* restart DMA if more samples are needed */
504 dma->cur_dma = 1 - dma->cur_dma;
505 das16_ai_setup_dma(dev, s, nsamples);
508 spin_unlock_irqrestore(&dev->spinlock, spin_flags);
510 comedi_buf_write_samples(s, desc->virt_addr, nsamples);
512 if (cmd->stop_src == TRIG_COUNT && async->scans_done >= cmd->stop_arg)
513 async->events |= COMEDI_CB_EOA;
515 comedi_handle_events(dev, s);
518 static void das16_timer_interrupt(struct timer_list *t)
520 struct das16_private_struct *devpriv = from_timer(devpriv, t, timer);
521 struct comedi_device *dev = devpriv->dev;
524 das16_interrupt(dev);
526 spin_lock_irqsave(&dev->spinlock, flags);
527 if (devpriv->timer_running)
528 mod_timer(&devpriv->timer, jiffies + timer_period());
529 spin_unlock_irqrestore(&dev->spinlock, flags);
532 static void das16_ai_set_mux_range(struct comedi_device *dev,
533 unsigned int first_chan,
534 unsigned int last_chan,
537 const struct das16_board *board = dev->board_ptr;
539 /* set multiplexer */
540 outb(first_chan | (last_chan << 4), dev->iobase + DAS16_MUX_REG);
542 /* some boards do not have programmable gain */
543 if (board->ai_pg == das16_pg_none)
547 * Set gain (this is also burst rate register but according to
548 * computer boards manual, burst rate does nothing, even on
551 outb((das16_gainlists[board->ai_pg])[range],
552 dev->iobase + DAS16_GAIN_REG);
555 static int das16_ai_check_chanlist(struct comedi_device *dev,
556 struct comedi_subdevice *s,
557 struct comedi_cmd *cmd)
559 unsigned int chan0 = CR_CHAN(cmd->chanlist[0]);
560 unsigned int range0 = CR_RANGE(cmd->chanlist[0]);
563 for (i = 1; i < cmd->chanlist_len; i++) {
564 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
565 unsigned int range = CR_RANGE(cmd->chanlist[i]);
567 if (chan != ((chan0 + i) % s->n_chan)) {
568 dev_dbg(dev->class_dev,
569 "entries in chanlist must be consecutive channels, counting upwards\n");
573 if (range != range0) {
574 dev_dbg(dev->class_dev,
575 "entries in chanlist must all have the same gain\n");
583 static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
584 struct comedi_cmd *cmd)
586 const struct das16_board *board = dev->board_ptr;
587 struct das16_private_struct *devpriv = dev->private;
589 unsigned int trig_mask;
592 /* Step 1 : check if triggers are trivially valid */
594 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
596 trig_mask = TRIG_FOLLOW;
597 if (devpriv->can_burst)
598 trig_mask |= TRIG_TIMER | TRIG_EXT;
599 err |= comedi_check_trigger_src(&cmd->scan_begin_src, trig_mask);
601 trig_mask = TRIG_TIMER | TRIG_EXT;
602 if (devpriv->can_burst)
603 trig_mask |= TRIG_NOW;
604 err |= comedi_check_trigger_src(&cmd->convert_src, trig_mask);
606 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
607 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
612 /* Step 2a : make sure trigger sources are unique */
614 err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
615 err |= comedi_check_trigger_is_unique(cmd->convert_src);
616 err |= comedi_check_trigger_is_unique(cmd->stop_src);
618 /* Step 2b : and mutually compatible */
620 /* make sure scan_begin_src and convert_src don't conflict */
621 if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW)
623 if (cmd->scan_begin_src != TRIG_FOLLOW && cmd->convert_src != TRIG_NOW)
629 /* Step 3: check if arguments are trivially valid */
631 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
633 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
634 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
636 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
639 /* check against maximum frequency */
640 if (cmd->scan_begin_src == TRIG_TIMER) {
641 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
646 if (cmd->convert_src == TRIG_TIMER) {
647 err |= comedi_check_trigger_arg_min(&cmd->convert_arg,
651 if (cmd->stop_src == TRIG_COUNT)
652 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
654 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
659 /* step 4: fix up arguments */
660 if (cmd->scan_begin_src == TRIG_TIMER) {
661 arg = cmd->scan_begin_arg;
662 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
663 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
665 if (cmd->convert_src == TRIG_TIMER) {
666 arg = cmd->convert_arg;
667 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
668 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
673 /* Step 5: check channel list if it exists */
674 if (cmd->chanlist && cmd->chanlist_len > 0)
675 err |= das16_ai_check_chanlist(dev, s, cmd);
683 static unsigned int das16_set_pacer(struct comedi_device *dev, unsigned int ns,
686 comedi_8254_cascade_ns_to_timer(dev->pacer, &ns, flags);
687 comedi_8254_update_divisors(dev->pacer);
688 comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
693 static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s)
695 struct das16_private_struct *devpriv = dev->private;
696 struct comedi_isadma *dma = devpriv->dma;
697 struct comedi_async *async = s->async;
698 struct comedi_cmd *cmd = &async->cmd;
699 unsigned int first_chan = CR_CHAN(cmd->chanlist[0]);
700 unsigned int last_chan = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]);
701 unsigned int range = CR_RANGE(cmd->chanlist[0]);
705 if (cmd->flags & CMDF_PRIORITY) {
706 dev_err(dev->class_dev,
707 "isa dma transfers cannot be performed with CMDF_PRIORITY, aborting\n");
711 if (devpriv->can_burst)
712 outb(DAS1600_CONV_DISABLE, dev->iobase + DAS1600_CONV_REG);
714 /* set mux and range for chanlist scan */
715 das16_ai_set_mux_range(dev, first_chan, last_chan, range);
717 /* set counter mode and counts */
718 cmd->convert_arg = das16_set_pacer(dev, cmd->convert_arg, cmd->flags);
720 /* enable counters */
722 if (devpriv->can_burst) {
723 if (cmd->convert_src == TRIG_NOW) {
724 outb(DAS1600_BURST_VAL,
725 dev->iobase + DAS1600_BURST_REG);
726 /* set burst length */
727 byte |= DAS16_PACER_BURST_LEN(cmd->chanlist_len - 1);
729 outb(0, dev->iobase + DAS1600_BURST_REG);
732 outb(byte, dev->iobase + DAS16_PACER_REG);
734 /* set up dma transfer */
736 das16_ai_setup_dma(dev, s, 0);
739 spin_lock_irqsave(&dev->spinlock, flags);
740 devpriv->timer_running = 1;
741 devpriv->timer.expires = jiffies + timer_period();
742 add_timer(&devpriv->timer);
744 /* enable DMA interrupt with external or internal pacing */
745 devpriv->ctrl_reg &= ~(DAS16_CTRL_INTE | DAS16_CTRL_PACING_MASK);
746 devpriv->ctrl_reg |= DAS16_CTRL_DMAE;
747 if (cmd->convert_src == TRIG_EXT)
748 devpriv->ctrl_reg |= DAS16_CTRL_EXT_PACER;
750 devpriv->ctrl_reg |= DAS16_CTRL_INT_PACER;
751 outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG);
753 if (devpriv->can_burst)
754 outb(0, dev->iobase + DAS1600_CONV_REG);
755 spin_unlock_irqrestore(&dev->spinlock, flags);
760 static int das16_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
762 struct das16_private_struct *devpriv = dev->private;
763 struct comedi_isadma *dma = devpriv->dma;
766 spin_lock_irqsave(&dev->spinlock, flags);
768 /* disable interrupts, dma and pacer clocked conversions */
769 devpriv->ctrl_reg &= ~(DAS16_CTRL_INTE | DAS16_CTRL_DMAE |
770 DAS16_CTRL_PACING_MASK);
771 outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG);
773 comedi_isadma_disable(dma->chan);
775 /* disable SW timer */
776 if (devpriv->timer_running) {
777 devpriv->timer_running = 0;
778 del_timer(&devpriv->timer);
781 if (devpriv->can_burst)
782 outb(0, dev->iobase + DAS1600_BURST_REG);
784 spin_unlock_irqrestore(&dev->spinlock, flags);
789 static void das16_ai_munge(struct comedi_device *dev,
790 struct comedi_subdevice *s, void *array,
791 unsigned int num_bytes,
792 unsigned int start_chan_index)
794 unsigned short *data = array;
795 unsigned int num_samples = comedi_bytes_to_samples(s, num_bytes);
799 for (i = 0; i < num_samples; i++) {
800 data[i] = le16_to_cpu(buf[i]);
801 if (s->maxdata == 0x0fff)
803 data[i] &= s->maxdata;
807 static int das16_ai_eoc(struct comedi_device *dev,
808 struct comedi_subdevice *s,
809 struct comedi_insn *insn,
810 unsigned long context)
814 status = inb(dev->iobase + DAS16_STATUS_REG);
815 if ((status & DAS16_STATUS_BUSY) == 0)
820 static int das16_ai_insn_read(struct comedi_device *dev,
821 struct comedi_subdevice *s,
822 struct comedi_insn *insn,
825 unsigned int chan = CR_CHAN(insn->chanspec);
826 unsigned int range = CR_RANGE(insn->chanspec);
831 /* set mux and range for single channel */
832 das16_ai_set_mux_range(dev, chan, chan, range);
834 for (i = 0; i < insn->n; i++) {
835 /* trigger conversion */
836 outb_p(0, dev->iobase + DAS16_TRIG_REG);
838 ret = comedi_timeout(dev, s, insn, das16_ai_eoc, 0);
842 val = inb(dev->iobase + DAS16_AI_MSB_REG) << 8;
843 val |= inb(dev->iobase + DAS16_AI_LSB_REG);
844 if (s->maxdata == 0x0fff)
854 static int das16_ao_insn_write(struct comedi_device *dev,
855 struct comedi_subdevice *s,
856 struct comedi_insn *insn,
859 unsigned int chan = CR_CHAN(insn->chanspec);
862 for (i = 0; i < insn->n; i++) {
863 unsigned int val = data[i];
865 s->readback[chan] = val;
869 outb(val & 0xff, dev->iobase + DAS16_AO_LSB_REG(chan));
870 outb((val >> 8) & 0xff, dev->iobase + DAS16_AO_MSB_REG(chan));
876 static int das16_di_insn_bits(struct comedi_device *dev,
877 struct comedi_subdevice *s,
878 struct comedi_insn *insn,
881 data[1] = inb(dev->iobase + DAS16_DIO_REG) & 0xf;
886 static int das16_do_insn_bits(struct comedi_device *dev,
887 struct comedi_subdevice *s,
888 struct comedi_insn *insn,
891 if (comedi_dio_update_state(s, data))
892 outb(s->state, dev->iobase + DAS16_DIO_REG);
899 static int das16_probe(struct comedi_device *dev, struct comedi_devconfig *it)
901 const struct das16_board *board = dev->board_ptr;
904 /* diobits indicates boards */
905 diobits = inb(dev->iobase + DAS16_DIO_REG) & 0xf0;
906 if (board->id != diobits) {
907 dev_err(dev->class_dev,
908 "requested board's id bits are incorrect (0x%x != 0x%x)\n",
916 static void das16_reset(struct comedi_device *dev)
918 outb(0, dev->iobase + DAS16_STATUS_REG);
919 outb(0, dev->iobase + DAS16_CTRL_REG);
920 outb(0, dev->iobase + DAS16_PACER_REG);
923 static void das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan)
925 struct das16_private_struct *devpriv = dev->private;
927 timer_setup(&devpriv->timer, das16_timer_interrupt, 0);
929 /* only DMA channels 3 and 1 are valid */
930 if (!(dma_chan == 1 || dma_chan == 3))
933 /* DMA uses two buffers */
934 devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan,
935 DAS16_DMA_SIZE, COMEDI_ISADMA_READ);
938 static void das16_free_dma(struct comedi_device *dev)
940 struct das16_private_struct *devpriv = dev->private;
943 del_timer_sync(&devpriv->timer);
944 comedi_isadma_free(devpriv->dma);
948 static const struct comedi_lrange *das16_ai_range(struct comedi_device *dev,
949 struct comedi_subdevice *s,
950 struct comedi_devconfig *it,
951 unsigned int pg_type,
954 unsigned int min = it->options[4];
955 unsigned int max = it->options[5];
957 /* get any user-defined input range */
958 if (pg_type == das16_pg_none && (min || max)) {
959 struct comedi_lrange *lrange;
960 struct comedi_krange *krange;
962 /* allocate single-range range table */
963 lrange = comedi_alloc_spriv(s,
964 struct_size(lrange, range, 1));
966 return &range_unknown;
968 /* initialize ai range */
970 krange = lrange->range;
973 krange->flags = UNIT_volt;
978 /* use software programmable range */
979 if (status & DAS16_STATUS_UNIPOLAR)
980 return das16_ai_uni_lranges[pg_type];
981 return das16_ai_bip_lranges[pg_type];
984 static const struct comedi_lrange *das16_ao_range(struct comedi_device *dev,
985 struct comedi_subdevice *s,
986 struct comedi_devconfig *it)
988 unsigned int min = it->options[6];
989 unsigned int max = it->options[7];
991 /* get any user-defined output range */
993 struct comedi_lrange *lrange;
994 struct comedi_krange *krange;
996 /* allocate single-range range table */
997 lrange = comedi_alloc_spriv(s,
998 struct_size(lrange, range, 1));
1000 return &range_unknown;
1002 /* initialize ao range */
1004 krange = lrange->range;
1007 krange->flags = UNIT_volt;
1012 return &range_unknown;
1015 static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1017 const struct das16_board *board = dev->board_ptr;
1018 struct das16_private_struct *devpriv;
1019 struct comedi_subdevice *s;
1020 unsigned int osc_base;
1021 unsigned int status;
1024 /* check that clock setting is valid */
1025 if (it->options[3]) {
1026 if (it->options[3] != 1 && it->options[3] != 10) {
1027 dev_err(dev->class_dev,
1028 "Invalid option. Master clock must be set to 1 or 10 (MHz)\n");
1033 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1038 if (board->size < 0x400) {
1039 ret = comedi_request_region(dev, it->options[0], board->size);
1043 ret = comedi_request_region(dev, it->options[0], 0x10);
1046 /* Request an additional region for the 8255 */
1047 ret = __comedi_request_region(dev, dev->iobase + 0x400,
1048 board->size & 0x3ff);
1051 devpriv->extra_iobase = dev->iobase + 0x400;
1052 devpriv->can_burst = 1;
1055 /* probe id bits to make sure they are consistent */
1056 if (das16_probe(dev, it))
1059 /* get master clock speed */
1060 osc_base = I8254_OSC_BASE_1MHZ;
1061 if (devpriv->can_burst) {
1062 status = inb(dev->iobase + DAS1600_STATUS_REG);
1063 if (status & DAS1600_STATUS_CLK_10MHZ)
1064 osc_base = I8254_OSC_BASE_10MHZ;
1067 osc_base = I8254_OSC_BASE_1MHZ / it->options[3];
1070 dev->pacer = comedi_8254_io_alloc(dev->iobase + DAS16_TIMER_BASE_REG,
1071 osc_base, I8254_IO8, 0);
1072 if (IS_ERR(dev->pacer))
1073 return PTR_ERR(dev->pacer);
1075 das16_alloc_dma(dev, it->options[2]);
1077 ret = comedi_alloc_subdevices(dev, 4 + board->has_8255);
1081 status = inb(dev->iobase + DAS16_STATUS_REG);
1083 /* Analog Input subdevice */
1084 s = &dev->subdevices[0];
1085 s->type = COMEDI_SUBD_AI;
1086 s->subdev_flags = SDF_READABLE;
1087 if (status & DAS16_STATUS_MUXBIT) {
1088 s->subdev_flags |= SDF_GROUND;
1091 s->subdev_flags |= SDF_DIFF;
1094 s->len_chanlist = s->n_chan;
1095 s->maxdata = board->ai_maxdata;
1096 s->range_table = das16_ai_range(dev, s, it, board->ai_pg, status);
1097 s->insn_read = das16_ai_insn_read;
1099 dev->read_subdev = s;
1100 s->subdev_flags |= SDF_CMD_READ;
1101 s->do_cmdtest = das16_cmd_test;
1102 s->do_cmd = das16_cmd_exec;
1103 s->cancel = das16_cancel;
1104 s->munge = das16_ai_munge;
1107 /* Analog Output subdevice */
1108 s = &dev->subdevices[1];
1109 if (board->has_ao) {
1110 s->type = COMEDI_SUBD_AO;
1111 s->subdev_flags = SDF_WRITABLE;
1113 s->maxdata = 0x0fff;
1114 s->range_table = das16_ao_range(dev, s, it);
1115 s->insn_write = das16_ao_insn_write;
1117 ret = comedi_alloc_subdev_readback(s);
1121 s->type = COMEDI_SUBD_UNUSED;
1124 /* Digital Input subdevice */
1125 s = &dev->subdevices[2];
1126 s->type = COMEDI_SUBD_DI;
1127 s->subdev_flags = SDF_READABLE;
1130 s->range_table = &range_digital;
1131 s->insn_bits = das16_di_insn_bits;
1133 /* Digital Output subdevice */
1134 s = &dev->subdevices[3];
1135 s->type = COMEDI_SUBD_DO;
1136 s->subdev_flags = SDF_WRITABLE;
1139 s->range_table = &range_digital;
1140 s->insn_bits = das16_do_insn_bits;
1142 /* initialize digital output lines */
1143 outb(s->state, dev->iobase + DAS16_DIO_REG);
1145 /* 8255 Digital I/O subdevice */
1146 if (board->has_8255) {
1147 s = &dev->subdevices[4];
1148 ret = subdev_8255_io_init(dev, s, board->i8255_offset);
1154 /* set the interrupt level */
1155 devpriv->ctrl_reg = DAS16_CTRL_IRQ(dev->irq);
1156 outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG);
1158 if (devpriv->can_burst) {
1159 outb(DAS1600_ENABLE_VAL, dev->iobase + DAS1600_ENABLE_REG);
1160 outb(0, dev->iobase + DAS1600_CONV_REG);
1161 outb(0, dev->iobase + DAS1600_BURST_REG);
1167 static void das16_detach(struct comedi_device *dev)
1169 const struct das16_board *board = dev->board_ptr;
1170 struct das16_private_struct *devpriv = dev->private;
1175 das16_free_dma(dev);
1177 if (devpriv->extra_iobase)
1178 release_region(devpriv->extra_iobase,
1179 board->size & 0x3ff);
1182 comedi_legacy_detach(dev);
1185 static struct comedi_driver das16_driver = {
1186 .driver_name = "das16",
1187 .module = THIS_MODULE,
1188 .attach = das16_attach,
1189 .detach = das16_detach,
1190 .board_name = &das16_boards[0].name,
1191 .num_names = ARRAY_SIZE(das16_boards),
1192 .offset = sizeof(das16_boards[0]),
1194 module_comedi_driver(das16_driver);
1196 MODULE_AUTHOR("Comedi https://www.comedi.org");
1197 MODULE_DESCRIPTION("Comedi driver for DAS16 compatible boards");
1198 MODULE_LICENSE("GPL");