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.
23 Description: Advantech PCL-711 and 711b, ADLink ACL-8112
24 Author: ds, Janne Jalkanen <jalkanen@cs.hut.fi>, Eric Bunn <ebu@cs.hut.fi>
25 Status: mostly complete
26 Devices: [Advantech] PCL-711 (pcl711), PCL-711B (pcl711b),
27 [AdLink] ACL-8112HG (acl8112hg), ACL-8112DG (acl8112dg)
29 Since these boards do not have DMA or FIFOs, only immediate mode is
35 Dave Andruczyk <dave@tech.buffalostate.edu> also wrote a
36 driver for the PCL-711. I used a few ideas from his driver
37 here. His driver also has more comments, if you are
38 interested in understanding how this driver works.
39 http://tech.buffalostate.edu/~dave/driver/
41 The ACL-8112 driver was hacked from the sources of the PCL-711
42 driver (the 744 chip used on the 8112 is almost the same as
43 the 711b chip, but it has more I/O channels) by
44 Janne Jalkanen (jalkanen@cs.hut.fi) and
45 Erik Bunn (ebu@cs.hut.fi). Remerged with the PCL-711 driver
49 This driver supports both TRIGNOW and TRIGCLK,
50 but does not yet support DMA transfers. It also supports
51 both high (HG) and low (DG) versions of the card, though
52 the HG version has been untested.
56 #include <linux/module.h>
57 #include <linux/interrupt.h>
58 #include "../comedidev.h"
60 #include <linux/delay.h>
62 #include "comedi_fc.h"
66 * I/O port register map
68 #define PCL711_TIMER_BASE 0x00
69 #define PCL711_AI_LSB_REG 0x04
70 #define PCL711_AI_MSB_REG 0x05
71 #define PCL711_AI_MSB_DRDY (1 << 4)
72 #define PCL711_AO_LSB_REG(x) (0x04 + ((x) * 2))
73 #define PCL711_AO_MSB_REG(x) (0x05 + ((x) * 2))
74 #define PCL711_DI_LO 0x06
75 #define PCL711_DI_HI 0x07
76 #define PCL711_CLRINTR 0x08
77 #define PCL711_GAIN 0x09
78 #define PCL711_MUX_REG 0x0a
79 #define PCL711_MUX_CHAN(x) (((x) & 0xf) << 0)
80 #define PCL711_MUX_CS0 (1 << 4)
81 #define PCL711_MUX_CS1 (1 << 5)
82 #define PCL711_MUX_DIFF (PCL711_MUX_CS0 | PCL711_MUX_CS1)
83 #define PCL711_MODE_REG 0x0b
84 #define PCL711_MODE_DEFAULT (0 << 0)
85 #define PCL711_MODE_SOFTTRIG (1 << 0)
86 #define PCL711_MODE_EXT (2 << 0)
87 #define PCL711_MODE_EXT_IRQ (3 << 0)
88 #define PCL711_MODE_PACER (4 << 0)
89 #define PCL711_MODE_PACER_IRQ (6 << 0)
90 #define PCL711_MODE_IRQ(x) (((x) & 0x7) << 4)
91 #define PCL711_SOFTTRIG_REG 0x0c
92 #define PCL711_SOFTTRIG (0 << 0) /* any value will work */
93 #define PCL711_DO_LO 0x0d
94 #define PCL711_DO_HI 0x0e
96 static const struct comedi_lrange range_pcl711b_ai = {
106 static const struct comedi_lrange range_acl8112hg_ai = {
123 static const struct comedi_lrange range_acl8112dg_ai = {
137 struct pcl711_board {
142 const struct comedi_lrange *ai_range_type;
145 static const struct pcl711_board boardtypes[] = {
150 .ai_range_type = &range_bipolar5,
156 .ai_range_type = &range_pcl711b_ai,
162 .ai_range_type = &range_acl8112hg_ai,
168 .ai_range_type = &range_acl8112dg_ai,
172 struct pcl711_private {
174 unsigned int ao_readback[2];
175 unsigned int divisor1;
176 unsigned int divisor2;
179 static void pcl711_ai_set_mode(struct comedi_device *dev, unsigned int mode)
182 * The pcl711b board uses bits in the mode register to select the
183 * interrupt. The other boards supported by this driver all use
184 * jumpers on the board.
186 * Enables the interrupt when needed on the pcl711b board. These
187 * bits do nothing on the other boards.
189 if (mode == PCL711_MODE_EXT_IRQ || mode == PCL711_MODE_PACER_IRQ)
190 mode |= PCL711_MODE_IRQ(dev->irq);
192 outb(mode, dev->iobase + PCL711_MODE_REG);
195 static unsigned int pcl711_ai_get_sample(struct comedi_device *dev,
196 struct comedi_subdevice *s)
200 val = inb(dev->iobase + PCL711_AI_MSB_REG) << 8;
201 val |= inb(dev->iobase + PCL711_AI_LSB_REG);
203 return val & s->maxdata;
206 static irqreturn_t pcl711_interrupt(int irq, void *d)
208 struct comedi_device *dev = d;
209 struct pcl711_private *devpriv = dev->private;
210 struct comedi_subdevice *s = dev->read_subdev;
213 if (!dev->attached) {
214 comedi_error(dev, "spurious interrupt");
218 data = pcl711_ai_get_sample(dev, s);
220 outb(0, dev->iobase + PCL711_CLRINTR);
222 /* FIXME! Nothing else sets ntrig! */
223 if (!(--devpriv->ntrig)) {
224 pcl711_ai_set_mode(dev, PCL711_MODE_SOFTTRIG);
226 s->async->events |= COMEDI_CB_EOA;
228 comedi_event(dev, s);
232 static void pcl711_set_changain(struct comedi_device *dev,
233 struct comedi_subdevice *s,
234 unsigned int chanspec)
236 unsigned int chan = CR_CHAN(chanspec);
237 unsigned int range = CR_RANGE(chanspec);
238 unsigned int aref = CR_AREF(chanspec);
239 unsigned int mux = 0;
241 outb(range, dev->iobase + PCL711_GAIN);
244 /* Select the correct MPC508A chip */
245 if (aref == AREF_DIFF) {
247 mux |= PCL711_MUX_DIFF;
250 mux |= PCL711_MUX_CS0;
252 mux |= PCL711_MUX_CS1;
255 outb(mux | PCL711_MUX_CHAN(chan), dev->iobase + PCL711_MUX_REG);
258 static int pcl711_ai_wait_for_eoc(struct comedi_device *dev,
259 unsigned int timeout)
264 msb = inb(dev->iobase + PCL711_AI_MSB_REG);
265 if ((msb & PCL711_AI_MSB_DRDY) == 0)
272 static int pcl711_ai_insn_read(struct comedi_device *dev,
273 struct comedi_subdevice *s,
274 struct comedi_insn *insn,
280 pcl711_set_changain(dev, s, insn->chanspec);
282 pcl711_ai_set_mode(dev, PCL711_MODE_SOFTTRIG);
284 for (i = 0; i < insn->n; i++) {
285 outb(PCL711_SOFTTRIG, dev->iobase + PCL711_SOFTTRIG_REG);
287 ret = pcl711_ai_wait_for_eoc(dev, 100);
291 data[i] = pcl711_ai_get_sample(dev, s);
297 static int pcl711_ai_cmdtest(struct comedi_device *dev,
298 struct comedi_subdevice *s, struct comedi_cmd *cmd)
300 struct pcl711_private *devpriv = dev->private;
304 /* Step 1 : check if triggers are trivially valid */
306 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
307 err |= cfc_check_trigger_src(&cmd->scan_begin_src,
308 TRIG_TIMER | TRIG_EXT);
309 err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
310 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
311 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
316 /* Step 2a : make sure trigger sources are unique */
318 err |= cfc_check_trigger_is_unique(cmd->scan_begin_src);
319 err |= cfc_check_trigger_is_unique(cmd->stop_src);
321 /* Step 2b : and mutually compatible */
326 /* Step 3: check if arguments are trivially valid */
328 err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
330 if (cmd->scan_begin_src == TRIG_EXT) {
331 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
333 #define MAX_SPEED 1000
334 #define TIMER_BASE 100
335 err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
339 err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
340 err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
342 if (cmd->stop_src == TRIG_NONE) {
343 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
353 if (cmd->scan_begin_src == TRIG_TIMER) {
354 tmp = cmd->scan_begin_arg;
355 i8253_cascade_ns_to_timer_2div(TIMER_BASE,
358 &cmd->scan_begin_arg,
359 cmd->flags & TRIG_ROUND_MASK);
360 if (tmp != cmd->scan_begin_arg)
370 static int pcl711_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
373 struct comedi_cmd *cmd = &s->async->cmd;
375 pcl711_set_changain(dev, s, cmd->chanlist[0]);
377 if (cmd->scan_begin_src == TRIG_TIMER) {
379 i8253_cascade_ns_to_timer(500, /* 2 Mhz */
381 &cmd->scan_begin_arg,
384 i8254_load(dev->iobase + PCL711_TIMER_BASE, 0,
385 1, timer1, I8254_MODE2 | I8254_BINARY);
386 i8254_load(dev->iobase + PCL711_TIMER_BASE, 0,
387 2, timer2, I8254_MODE2 | I8254_BINARY);
389 /* clear pending interrupts (just in case) */
390 outb(0, dev->iobase + PCL711_CLRINTR);
392 pcl711_ai_set_mode(dev, PCL711_MODE_PACER_IRQ);
394 pcl711_ai_set_mode(dev, PCL711_MODE_EXT_IRQ);
400 static void pcl711_ao_write(struct comedi_device *dev,
401 unsigned int chan, unsigned int val)
403 outb(val & 0xff, dev->iobase + PCL711_AO_LSB_REG(chan));
404 outb((val >> 8) & 0xff, dev->iobase + PCL711_AO_MSB_REG(chan));
407 static int pcl711_ao_insn_write(struct comedi_device *dev,
408 struct comedi_subdevice *s,
409 struct comedi_insn *insn,
412 struct pcl711_private *devpriv = dev->private;
413 unsigned int chan = CR_CHAN(insn->chanspec);
414 unsigned int val = devpriv->ao_readback[chan];
417 for (i = 0; i < insn->n; i++) {
419 pcl711_ao_write(dev, chan, val);
421 devpriv->ao_readback[chan] = val;
426 static int pcl711_ao_insn_read(struct comedi_device *dev,
427 struct comedi_subdevice *s,
428 struct comedi_insn *insn,
431 struct pcl711_private *devpriv = dev->private;
432 unsigned int chan = CR_CHAN(insn->chanspec);
435 for (i = 0; i < insn->n; i++)
436 data[i] = devpriv->ao_readback[chan];
441 /* Digital port read - Untested on 8112 */
442 static int pcl711_di_insn_bits(struct comedi_device *dev,
443 struct comedi_subdevice *s,
444 struct comedi_insn *insn, unsigned int *data)
446 data[1] = inb(dev->iobase + PCL711_DI_LO) |
447 (inb(dev->iobase + PCL711_DI_HI) << 8);
452 static int pcl711_do_insn_bits(struct comedi_device *dev,
453 struct comedi_subdevice *s,
454 struct comedi_insn *insn,
459 mask = comedi_dio_update_state(s, data);
462 outb(s->state & 0xff, dev->iobase + PCL711_DO_LO);
464 outb((s->state >> 8), dev->iobase + PCL711_DO_HI);
472 static int pcl711_attach(struct comedi_device *dev, struct comedi_devconfig *it)
474 const struct pcl711_board *board = comedi_board(dev);
475 struct pcl711_private *devpriv;
476 struct comedi_subdevice *s;
479 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
483 ret = comedi_request_region(dev, it->options[0], 0x10);
487 if (it->options[1] && it->options[1] <= board->maxirq) {
488 ret = request_irq(it->options[1], pcl711_interrupt, 0,
489 dev->board_name, dev);
491 dev->irq = it->options[1];
494 ret = comedi_alloc_subdevices(dev, 4);
498 /* Analog Input subdevice */
499 s = &dev->subdevices[0];
500 s->type = COMEDI_SUBD_AI;
501 s->subdev_flags = SDF_READABLE | SDF_GROUND;
502 if (board->n_aichan > 8)
503 s->subdev_flags |= SDF_DIFF;
504 s->n_chan = board->n_aichan;
506 s->range_table = board->ai_range_type;
507 s->insn_read = pcl711_ai_insn_read;
509 dev->read_subdev = s;
510 s->subdev_flags |= SDF_CMD_READ;
512 s->do_cmdtest = pcl711_ai_cmdtest;
513 s->do_cmd = pcl711_ai_cmd;
516 /* Analog Output subdevice */
517 s = &dev->subdevices[1];
518 s->type = COMEDI_SUBD_AO;
519 s->subdev_flags = SDF_WRITABLE;
520 s->n_chan = board->n_aochan;
522 s->range_table = &range_bipolar5;
523 s->insn_write = pcl711_ao_insn_write;
524 s->insn_read = pcl711_ao_insn_read;
526 /* Digital Input subdevice */
527 s = &dev->subdevices[2];
528 s->type = COMEDI_SUBD_DI;
529 s->subdev_flags = SDF_READABLE;
532 s->range_table = &range_digital;
533 s->insn_bits = pcl711_di_insn_bits;
535 /* Digital Output subdevice */
536 s = &dev->subdevices[3];
537 s->type = COMEDI_SUBD_DO;
538 s->subdev_flags = SDF_WRITABLE;
541 s->range_table = &range_digital;
542 s->insn_bits = pcl711_do_insn_bits;
545 pcl711_ao_write(dev, 0, 0x0);
546 pcl711_ao_write(dev, 1, 0x0);
551 static struct comedi_driver pcl711_driver = {
552 .driver_name = "pcl711",
553 .module = THIS_MODULE,
554 .attach = pcl711_attach,
555 .detach = comedi_legacy_detach,
556 .board_name = &boardtypes[0].name,
557 .num_names = ARRAY_SIZE(boardtypes),
558 .offset = sizeof(struct pcl711_board),
560 module_comedi_driver(pcl711_driver);
562 MODULE_AUTHOR("Comedi http://www.comedi.org");
563 MODULE_DESCRIPTION("Comedi low-level driver");
564 MODULE_LICENSE("GPL");