2 comedi/drivers/pcl711.c
3 hardware driver for PC-LabCard PCL-711 and AdSys ACL-8112
6 COMEDI - Linux Control and Measurement Device Interface
7 Copyright (C) 1998 David A. Schleef <ds@schleef.org>
8 Janne Jalkanen <jalkanen@cs.hut.fi>
9 Eric Bunn <ebu@cs.hut.fi>
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 Description: Advantech PCL-711 and 711b, ADLink ACL-8112
29 Author: ds, Janne Jalkanen <jalkanen@cs.hut.fi>, Eric Bunn <ebu@cs.hut.fi>
30 Status: mostly complete
31 Devices: [Advantech] PCL-711 (pcl711), PCL-711B (pcl711b),
32 [AdLink] ACL-8112HG (acl8112hg), ACL-8112DG (acl8112dg)
34 Since these boards do not have DMA or FIFOs, only immediate mode is
40 Dave Andruczyk <dave@tech.buffalostate.edu> also wrote a
41 driver for the PCL-711. I used a few ideas from his driver
42 here. His driver also has more comments, if you are
43 interested in understanding how this driver works.
44 http://tech.buffalostate.edu/~dave/driver/
46 The ACL-8112 driver was hacked from the sources of the PCL-711
47 driver (the 744 chip used on the 8112 is almost the same as
48 the 711b chip, but it has more I/O channels) by
49 Janne Jalkanen (jalkanen@cs.hut.fi) and
50 Erik Bunn (ebu@cs.hut.fi). Remerged with the PCL-711 driver
54 This driver supports both TRIGNOW and TRIGCLK,
55 but does not yet support DMA transfers. It also supports
56 both high (HG) and low (DG) versions of the card, though
57 the HG version has been untested.
61 #include <linux/interrupt.h>
62 #include "../comedidev.h"
64 #include <linux/ioport.h>
65 #include <linux/delay.h>
69 #define PCL711_SIZE 16
74 #define PCL711_CTRCTL 3
75 #define PCL711_AD_LO 4
76 #define PCL711_DA0_LO 4
77 #define PCL711_AD_HI 5
78 #define PCL711_DA0_HI 5
79 #define PCL711_DI_LO 6
80 #define PCL711_DA1_LO 6
81 #define PCL711_DI_HI 7
82 #define PCL711_DA1_HI 7
83 #define PCL711_CLRINTR 8
86 #define PCL711_MODE 11
87 #define PCL711_SOFTTRIG 12
88 #define PCL711_DO_LO 13
89 #define PCL711_DO_HI 14
91 static const struct comedi_lrange range_pcl711b_ai = { 5, {
100 static const struct comedi_lrange range_acl8112hg_ai = { 12, {
116 static const struct comedi_lrange range_acl8112dg_ai = { 9, {
133 #define PCL711_TIMEOUT 100
134 #define PCL711_DRDY 0x10
136 static const int i8253_osc_base = 500; /* 2 Mhz */
138 struct pcl711_board {
148 const struct comedi_lrange *ai_range_type;
151 static const struct pcl711_board boardtypes[] = {
152 {"pcl711", 0, 0, 0, 5, 8, 1, 0, &range_bipolar5},
153 {"pcl711b", 1, 0, 0, 5, 8, 1, 7, &range_pcl711b_ai},
154 {"acl8112hg", 0, 1, 0, 12, 16, 2, 15, &range_acl8112hg_ai},
155 {"acl8112dg", 0, 1, 1, 9, 16, 2, 15, &range_acl8112dg_ai},
158 #define n_boardtypes (sizeof(boardtypes)/sizeof(struct pcl711_board))
159 #define this_board ((const struct pcl711_board *)dev->board_ptr)
161 static int pcl711_attach(struct comedi_device *dev,
162 struct comedi_devconfig *it);
163 static int pcl711_detach(struct comedi_device *dev);
164 static struct comedi_driver driver_pcl711 = {
165 .driver_name = "pcl711",
166 .module = THIS_MODULE,
167 .attach = pcl711_attach,
168 .detach = pcl711_detach,
169 .board_name = &boardtypes[0].name,
170 .num_names = n_boardtypes,
171 .offset = sizeof(struct pcl711_board),
174 COMEDI_INITCLEANUP(driver_pcl711);
176 struct pcl711_private {
183 unsigned int ao_readback[2];
184 unsigned int divisor1;
185 unsigned int divisor2;
188 #define devpriv ((struct pcl711_private *)dev->private)
190 static irqreturn_t pcl711_interrupt(int irq, void *d)
194 struct comedi_device *dev = d;
195 struct comedi_subdevice *s = dev->subdevices + 0;
197 if (!dev->attached) {
198 comedi_error(dev, "spurious interrupt");
202 hi = inb(dev->iobase + PCL711_AD_HI);
203 lo = inb(dev->iobase + PCL711_AD_LO);
204 outb(0, dev->iobase + PCL711_CLRINTR);
206 data = (hi << 8) | lo;
208 /* FIXME! Nothing else sets ntrig! */
209 if (!(--devpriv->ntrig)) {
210 if (this_board->is_8112)
211 outb(1, dev->iobase + PCL711_MODE);
213 outb(0, dev->iobase + PCL711_MODE);
215 s->async->events |= COMEDI_CB_EOA;
217 comedi_event(dev, s);
221 static void pcl711_set_changain(struct comedi_device *dev, int chan)
225 outb(CR_RANGE(chan), dev->iobase + PCL711_GAIN);
227 chan_register = CR_CHAN(chan);
229 if (this_board->is_8112) {
232 * Set the correct channel. The two channel banks are switched
233 * using the mask value.
234 * NB: To use differential channels, you should use
235 * mask = 0x30, but I haven't written the support for this
239 if (chan_register >= 8)
240 chan_register = 0x20 | (chan_register & 0x7);
242 chan_register |= 0x10;
244 outb(chan_register, dev->iobase + PCL711_MUX);
248 static int pcl711_ai_insn(struct comedi_device *dev, struct comedi_subdevice *s,
249 struct comedi_insn *insn, unsigned int *data)
254 pcl711_set_changain(dev, insn->chanspec);
256 for (n = 0; n < insn->n; n++) {
258 * Write the correct mode (software polling) and start polling
259 * by writing to the trigger register
261 outb(1, dev->iobase + PCL711_MODE);
263 if (!this_board->is_8112)
264 outb(0, dev->iobase + PCL711_SOFTTRIG);
268 hi = inb(dev->iobase + PCL711_AD_HI);
269 if (!(hi & PCL711_DRDY))
273 printk("comedi%d: pcl711: A/D timeout\n", dev->minor);
277 lo = inb(dev->iobase + PCL711_AD_LO);
279 data[n] = ((hi & 0xf) << 8) | lo;
285 static int pcl711_ai_cmdtest(struct comedi_device *dev,
286 struct comedi_subdevice *s, struct comedi_cmd *cmd)
292 tmp = cmd->start_src;
293 cmd->start_src &= TRIG_NOW;
294 if (!cmd->start_src || tmp != cmd->start_src)
297 tmp = cmd->scan_begin_src;
298 cmd->scan_begin_src &= TRIG_TIMER | TRIG_EXT;
299 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
302 tmp = cmd->convert_src;
303 cmd->convert_src &= TRIG_NOW;
304 if (!cmd->convert_src || tmp != cmd->convert_src)
307 tmp = cmd->scan_end_src;
308 cmd->scan_end_src &= TRIG_COUNT;
309 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
313 cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
314 if (!cmd->stop_src || tmp != cmd->stop_src)
322 if (cmd->scan_begin_src != TRIG_TIMER &&
323 cmd->scan_begin_src != TRIG_EXT)
325 if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
333 if (cmd->start_arg != 0) {
337 if (cmd->scan_begin_src == TRIG_EXT) {
338 if (cmd->scan_begin_arg != 0) {
339 cmd->scan_begin_arg = 0;
343 #define MAX_SPEED 1000
344 #define TIMER_BASE 100
345 if (cmd->scan_begin_arg < MAX_SPEED) {
346 cmd->scan_begin_arg = MAX_SPEED;
350 if (cmd->convert_arg != 0) {
351 cmd->convert_arg = 0;
354 if (cmd->scan_end_arg != cmd->chanlist_len) {
355 cmd->scan_end_arg = cmd->chanlist_len;
358 if (cmd->stop_src == TRIG_NONE) {
359 if (cmd->stop_arg != 0) {
372 if (cmd->scan_begin_src == TRIG_TIMER) {
373 tmp = cmd->scan_begin_arg;
374 i8253_cascade_ns_to_timer_2div(TIMER_BASE,
377 &cmd->scan_begin_arg,
378 cmd->flags & TRIG_ROUND_MASK);
379 if (tmp != cmd->scan_begin_arg)
389 static int pcl711_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
392 struct comedi_cmd *cmd = &s->async->cmd;
394 pcl711_set_changain(dev, cmd->chanlist[0]);
396 if (cmd->scan_begin_src == TRIG_TIMER) {
399 * timer chip is an 8253, with timers 1 and 2
401 * 0x74 = Select Counter 1 | LSB/MSB | Mode=2 | Binary
402 * Mode 2 = Rate generator
404 * 0xb4 = Select Counter 2 | LSB/MSB | Mode=2 | Binary
408 i8253_cascade_ns_to_timer(i8253_osc_base, &timer1, &timer2,
409 &cmd->scan_begin_arg,
412 outb(0x74, dev->iobase + PCL711_CTRCTL);
413 outb(timer1 & 0xff, dev->iobase + PCL711_CTR1);
414 outb((timer1 >> 8) & 0xff, dev->iobase + PCL711_CTR1);
415 outb(0xb4, dev->iobase + PCL711_CTRCTL);
416 outb(timer2 & 0xff, dev->iobase + PCL711_CTR2);
417 outb((timer2 >> 8) & 0xff, dev->iobase + PCL711_CTR2);
419 /* clear pending interrupts (just in case) */
420 outb(0, dev->iobase + PCL711_CLRINTR);
423 * Set mode to IRQ transfer
425 outb(devpriv->mode | 6, dev->iobase + PCL711_MODE);
427 /* external trigger */
428 outb(devpriv->mode | 3, dev->iobase + PCL711_MODE);
437 static int pcl711_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
438 struct comedi_insn *insn, unsigned int *data)
441 int chan = CR_CHAN(insn->chanspec);
443 for (n = 0; n < insn->n; n++) {
444 outb((data[n] & 0xff),
445 dev->iobase + (chan ? PCL711_DA1_LO : PCL711_DA0_LO));
447 dev->iobase + (chan ? PCL711_DA1_HI : PCL711_DA0_HI));
449 devpriv->ao_readback[chan] = data[n];
455 static int pcl711_ao_insn_read(struct comedi_device *dev,
456 struct comedi_subdevice *s,
457 struct comedi_insn *insn, unsigned int *data)
460 int chan = CR_CHAN(insn->chanspec);
462 for (n = 0; n < insn->n; n++)
463 data[n] = devpriv->ao_readback[chan];
469 /* Digital port read - Untested on 8112 */
470 static int pcl711_di_insn_bits(struct comedi_device *dev,
471 struct comedi_subdevice *s,
472 struct comedi_insn *insn, unsigned int *data)
477 data[1] = inb(dev->iobase + PCL711_DI_LO) |
478 (inb(dev->iobase + PCL711_DI_HI) << 8);
483 /* Digital port write - Untested on 8112 */
484 static int pcl711_do_insn_bits(struct comedi_device *dev,
485 struct comedi_subdevice *s,
486 struct comedi_insn *insn, unsigned int *data)
492 s->state &= ~data[0];
493 s->state |= data[0] & data[1];
495 if (data[0] & 0x00ff)
496 outb(s->state & 0xff, dev->iobase + PCL711_DO_LO);
497 if (data[0] & 0xff00)
498 outb((s->state >> 8), dev->iobase + PCL711_DO_HI);
505 /* Free any resources that we have claimed */
506 static int pcl711_detach(struct comedi_device *dev)
508 printk("comedi%d: pcl711: remove\n", dev->minor);
511 free_irq(dev->irq, dev);
514 release_region(dev->iobase, PCL711_SIZE);
520 static int pcl711_attach(struct comedi_device *dev, struct comedi_devconfig *it)
523 unsigned long iobase;
525 struct comedi_subdevice *s;
527 /* claim our I/O space */
529 iobase = it->options[0];
530 printk("comedi%d: pcl711: 0x%04lx ", dev->minor, iobase);
531 if (!request_region(iobase, PCL711_SIZE, "pcl711")) {
532 printk("I/O port conflict\n");
535 dev->iobase = iobase;
537 /* there should be a sanity check here */
539 /* set up some name stuff */
540 dev->board_name = this_board->name;
543 irq = it->options[1];
544 if (irq > this_board->maxirq) {
545 printk("irq out of range\n");
549 if (request_irq(irq, pcl711_interrupt, 0, "pcl711", dev)) {
550 printk("unable to allocate irq %u\n", irq);
553 printk("( irq = %u )\n", irq);
558 ret = alloc_subdevices(dev, 4);
562 ret = alloc_private(dev, sizeof(struct pcl711_private));
566 s = dev->subdevices + 0;
568 s->type = COMEDI_SUBD_AI;
569 s->subdev_flags = SDF_READABLE | SDF_GROUND;
570 s->n_chan = this_board->n_aichan;
573 s->range_table = this_board->ai_range_type;
574 s->insn_read = pcl711_ai_insn;
576 dev->read_subdev = s;
577 s->subdev_flags |= SDF_CMD_READ;
578 s->do_cmdtest = pcl711_ai_cmdtest;
579 s->do_cmd = pcl711_ai_cmd;
584 s->type = COMEDI_SUBD_AO;
585 s->subdev_flags = SDF_WRITABLE;
586 s->n_chan = this_board->n_aochan;
589 s->range_table = &range_bipolar5;
590 s->insn_write = pcl711_ao_insn;
591 s->insn_read = pcl711_ao_insn_read;
594 /* 16-bit digital input */
595 s->type = COMEDI_SUBD_DI;
596 s->subdev_flags = SDF_READABLE;
599 s->len_chanlist = 16;
600 s->range_table = &range_digital;
601 s->insn_bits = pcl711_di_insn_bits;
604 /* 16-bit digital out */
605 s->type = COMEDI_SUBD_DO;
606 s->subdev_flags = SDF_WRITABLE;
609 s->len_chanlist = 16;
610 s->range_table = &range_digital;
612 s->insn_bits = pcl711_do_insn_bits;
615 this is the "base value" for the mode register, which is
616 used for the irq on the PCL711
618 if (this_board->is_pcl711b)
619 devpriv->mode = (dev->irq << 4);
622 outb(0, dev->iobase + PCL711_DA0_LO);
623 outb(0, dev->iobase + PCL711_DA0_HI);
624 outb(0, dev->iobase + PCL711_DA1_LO);
625 outb(0, dev->iobase + PCL711_DA1_HI);