3 * Comedi driver for PC-LabCard PCL-711 and AdSys ACL-8112 and compatibles
4 * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
5 * Janne Jalkanen <jalkanen@cs.hut.fi>
6 * Eric Bunn <ebu@cs.hut.fi>
8 * COMEDI - Linux Control and Measurement Device Interface
9 * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
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.
24 * Description: Advantech PCL-711 and 711b, ADLink ACL-8112
25 * Devices: (Advantech) PCL-711 [pcl711]
26 * (Advantech) PCL-711B [pcl711b]
27 * (AdLink) ACL-8112HG [acl8112hg]
28 * (AdLink) ACL-8112DG [acl8112dg]
29 * Author: David A. Schleef <ds@schleef.org>
30 * Janne Jalkanen <jalkanen@cs.hut.fi>
31 * Eric Bunn <ebu@cs.hut.fi>
33 * Status: mostly complete
35 * Configuration Options:
40 #include <linux/module.h>
41 #include <linux/delay.h>
42 #include <linux/interrupt.h>
44 #include "../comedidev.h"
46 #include "comedi_fc.h"
50 * I/O port register map
52 #define PCL711_TIMER_BASE 0x00
53 #define PCL711_AI_LSB_REG 0x04
54 #define PCL711_AI_MSB_REG 0x05
55 #define PCL711_AI_MSB_DRDY (1 << 4)
56 #define PCL711_AO_LSB_REG(x) (0x04 + ((x) * 2))
57 #define PCL711_AO_MSB_REG(x) (0x05 + ((x) * 2))
58 #define PCL711_DI_LSB_REG 0x06
59 #define PCL711_DI_MSB_REG 0x07
60 #define PCL711_INT_STAT_REG 0x08
61 #define PCL711_INT_STAT_CLR (0 << 0) /* any value will work */
62 #define PCL711_AI_GAIN_REG 0x09
63 #define PCL711_AI_GAIN(x) (((x) & 0xf) << 0)
64 #define PCL711_MUX_REG 0x0a
65 #define PCL711_MUX_CHAN(x) (((x) & 0xf) << 0)
66 #define PCL711_MUX_CS0 (1 << 4)
67 #define PCL711_MUX_CS1 (1 << 5)
68 #define PCL711_MUX_DIFF (PCL711_MUX_CS0 | PCL711_MUX_CS1)
69 #define PCL711_MODE_REG 0x0b
70 #define PCL711_MODE_DEFAULT (0 << 0)
71 #define PCL711_MODE_SOFTTRIG (1 << 0)
72 #define PCL711_MODE_EXT (2 << 0)
73 #define PCL711_MODE_EXT_IRQ (3 << 0)
74 #define PCL711_MODE_PACER (4 << 0)
75 #define PCL711_MODE_PACER_IRQ (6 << 0)
76 #define PCL711_MODE_IRQ(x) (((x) & 0x7) << 4)
77 #define PCL711_SOFTTRIG_REG 0x0c
78 #define PCL711_SOFTTRIG (0 << 0) /* any value will work */
79 #define PCL711_DO_LSB_REG 0x0d
80 #define PCL711_DO_MSB_REG 0x0e
82 static const struct comedi_lrange range_pcl711b_ai = {
92 static const struct comedi_lrange range_acl8112hg_ai = {
109 static const struct comedi_lrange range_acl8112dg_ai = {
123 struct pcl711_board {
128 const struct comedi_lrange *ai_range_type;
131 static const struct pcl711_board boardtypes[] = {
136 .ai_range_type = &range_bipolar5,
142 .ai_range_type = &range_pcl711b_ai,
148 .ai_range_type = &range_acl8112hg_ai,
154 .ai_range_type = &range_acl8112dg_ai,
158 struct pcl711_private {
160 unsigned int divisor1;
161 unsigned int divisor2;
164 static void pcl711_ai_set_mode(struct comedi_device *dev, unsigned int mode)
167 * The pcl711b board uses bits in the mode register to select the
168 * interrupt. The other boards supported by this driver all use
169 * jumpers on the board.
171 * Enables the interrupt when needed on the pcl711b board. These
172 * bits do nothing on the other boards.
174 if (mode == PCL711_MODE_EXT_IRQ || mode == PCL711_MODE_PACER_IRQ)
175 mode |= PCL711_MODE_IRQ(dev->irq);
177 outb(mode, dev->iobase + PCL711_MODE_REG);
180 static unsigned int pcl711_ai_get_sample(struct comedi_device *dev,
181 struct comedi_subdevice *s)
185 val = inb(dev->iobase + PCL711_AI_MSB_REG) << 8;
186 val |= inb(dev->iobase + PCL711_AI_LSB_REG);
188 return val & s->maxdata;
191 static int pcl711_ai_cancel(struct comedi_device *dev,
192 struct comedi_subdevice *s)
194 outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
195 pcl711_ai_set_mode(dev, PCL711_MODE_SOFTTRIG);
199 static irqreturn_t pcl711_interrupt(int irq, void *d)
201 struct comedi_device *dev = d;
202 struct pcl711_private *devpriv = dev->private;
203 struct comedi_subdevice *s = dev->read_subdev;
204 struct comedi_cmd *cmd = &s->async->cmd;
207 if (!dev->attached) {
208 dev_err(dev->class_dev, "spurious interrupt\n");
212 data = pcl711_ai_get_sample(dev, s);
214 outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
216 if (comedi_buf_write_samples(s, &data, 1)) {
217 if (cmd->stop_src == TRIG_COUNT && !(--devpriv->ntrig))
218 s->async->events |= COMEDI_CB_EOA;
220 comedi_handle_events(dev, s);
225 static void pcl711_set_changain(struct comedi_device *dev,
226 struct comedi_subdevice *s,
227 unsigned int chanspec)
229 unsigned int chan = CR_CHAN(chanspec);
230 unsigned int range = CR_RANGE(chanspec);
231 unsigned int aref = CR_AREF(chanspec);
232 unsigned int mux = 0;
234 outb(PCL711_AI_GAIN(range), dev->iobase + PCL711_AI_GAIN_REG);
237 /* Select the correct MPC508A chip */
238 if (aref == AREF_DIFF) {
240 mux |= PCL711_MUX_DIFF;
243 mux |= PCL711_MUX_CS0;
245 mux |= PCL711_MUX_CS1;
248 outb(mux | PCL711_MUX_CHAN(chan), dev->iobase + PCL711_MUX_REG);
251 static int pcl711_ai_eoc(struct comedi_device *dev,
252 struct comedi_subdevice *s,
253 struct comedi_insn *insn,
254 unsigned long context)
258 status = inb(dev->iobase + PCL711_AI_MSB_REG);
259 if ((status & PCL711_AI_MSB_DRDY) == 0)
264 static int pcl711_ai_insn_read(struct comedi_device *dev,
265 struct comedi_subdevice *s,
266 struct comedi_insn *insn,
272 pcl711_set_changain(dev, s, insn->chanspec);
274 pcl711_ai_set_mode(dev, PCL711_MODE_SOFTTRIG);
276 for (i = 0; i < insn->n; i++) {
277 outb(PCL711_SOFTTRIG, dev->iobase + PCL711_SOFTTRIG_REG);
279 ret = comedi_timeout(dev, s, insn, pcl711_ai_eoc, 0);
283 data[i] = pcl711_ai_get_sample(dev, s);
289 static int pcl711_ai_cmdtest(struct comedi_device *dev,
290 struct comedi_subdevice *s, struct comedi_cmd *cmd)
292 struct pcl711_private *devpriv = dev->private;
296 /* Step 1 : check if triggers are trivially valid */
298 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
299 err |= cfc_check_trigger_src(&cmd->scan_begin_src,
300 TRIG_TIMER | TRIG_EXT);
301 err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
302 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
303 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
308 /* Step 2a : make sure trigger sources are unique */
310 err |= cfc_check_trigger_is_unique(cmd->scan_begin_src);
311 err |= cfc_check_trigger_is_unique(cmd->stop_src);
313 /* Step 2b : and mutually compatible */
318 /* Step 3: check if arguments are trivially valid */
320 err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
322 if (cmd->scan_begin_src == TRIG_EXT) {
323 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
325 #define MAX_SPEED 1000
326 err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
330 err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
331 err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
333 if (cmd->stop_src == TRIG_COUNT)
334 err |= cfc_check_trigger_arg_min(&cmd->stop_arg, 1);
336 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
343 if (cmd->scan_begin_src == TRIG_TIMER) {
344 arg = cmd->scan_begin_arg;
345 i8253_cascade_ns_to_timer(I8254_OSC_BASE_2MHZ,
349 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
358 static void pcl711_ai_load_counters(struct comedi_device *dev)
360 struct pcl711_private *devpriv = dev->private;
361 unsigned long timer_base = dev->iobase + PCL711_TIMER_BASE;
363 i8254_set_mode(timer_base, 0, 1, I8254_MODE2 | I8254_BINARY);
364 i8254_set_mode(timer_base, 0, 2, I8254_MODE2 | I8254_BINARY);
366 i8254_write(timer_base, 0, 1, devpriv->divisor1);
367 i8254_write(timer_base, 0, 2, devpriv->divisor2);
370 static int pcl711_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
372 struct pcl711_private *devpriv = dev->private;
373 struct comedi_cmd *cmd = &s->async->cmd;
375 pcl711_set_changain(dev, s, cmd->chanlist[0]);
377 if (cmd->stop_src == TRIG_COUNT)
378 devpriv->ntrig = cmd->stop_arg;
380 if (cmd->scan_begin_src == TRIG_TIMER) {
381 pcl711_ai_load_counters(dev);
382 outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
383 pcl711_ai_set_mode(dev, PCL711_MODE_PACER_IRQ);
385 pcl711_ai_set_mode(dev, PCL711_MODE_EXT_IRQ);
391 static void pcl711_ao_write(struct comedi_device *dev,
392 unsigned int chan, unsigned int val)
394 outb(val & 0xff, dev->iobase + PCL711_AO_LSB_REG(chan));
395 outb((val >> 8) & 0xff, dev->iobase + PCL711_AO_MSB_REG(chan));
398 static int pcl711_ao_insn_write(struct comedi_device *dev,
399 struct comedi_subdevice *s,
400 struct comedi_insn *insn,
403 unsigned int chan = CR_CHAN(insn->chanspec);
404 unsigned int val = s->readback[chan];
407 for (i = 0; i < insn->n; i++) {
409 pcl711_ao_write(dev, chan, val);
411 s->readback[chan] = val;
416 static int pcl711_di_insn_bits(struct comedi_device *dev,
417 struct comedi_subdevice *s,
418 struct comedi_insn *insn,
423 val = inb(dev->iobase + PCL711_DI_LSB_REG);
424 val |= (inb(dev->iobase + PCL711_DI_MSB_REG) << 8);
431 static int pcl711_do_insn_bits(struct comedi_device *dev,
432 struct comedi_subdevice *s,
433 struct comedi_insn *insn,
438 mask = comedi_dio_update_state(s, data);
441 outb(s->state & 0xff, dev->iobase + PCL711_DO_LSB_REG);
443 outb((s->state >> 8), dev->iobase + PCL711_DO_MSB_REG);
451 static int pcl711_attach(struct comedi_device *dev, struct comedi_devconfig *it)
453 const struct pcl711_board *board = dev->board_ptr;
454 struct pcl711_private *devpriv;
455 struct comedi_subdevice *s;
458 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
462 ret = comedi_request_region(dev, it->options[0], 0x10);
466 if (it->options[1] && it->options[1] <= board->maxirq) {
467 ret = request_irq(it->options[1], pcl711_interrupt, 0,
468 dev->board_name, dev);
470 dev->irq = it->options[1];
473 ret = comedi_alloc_subdevices(dev, 4);
477 /* Analog Input subdevice */
478 s = &dev->subdevices[0];
479 s->type = COMEDI_SUBD_AI;
480 s->subdev_flags = SDF_READABLE | SDF_GROUND;
481 if (board->n_aichan > 8)
482 s->subdev_flags |= SDF_DIFF;
483 s->n_chan = board->n_aichan;
485 s->range_table = board->ai_range_type;
486 s->insn_read = pcl711_ai_insn_read;
488 dev->read_subdev = s;
489 s->subdev_flags |= SDF_CMD_READ;
491 s->do_cmdtest = pcl711_ai_cmdtest;
492 s->do_cmd = pcl711_ai_cmd;
493 s->cancel = pcl711_ai_cancel;
496 /* Analog Output subdevice */
497 s = &dev->subdevices[1];
498 s->type = COMEDI_SUBD_AO;
499 s->subdev_flags = SDF_WRITABLE;
500 s->n_chan = board->n_aochan;
502 s->range_table = &range_bipolar5;
503 s->insn_write = pcl711_ao_insn_write;
504 s->insn_read = comedi_readback_insn_read;
506 ret = comedi_alloc_subdev_readback(s);
510 /* Digital Input subdevice */
511 s = &dev->subdevices[2];
512 s->type = COMEDI_SUBD_DI;
513 s->subdev_flags = SDF_READABLE;
516 s->range_table = &range_digital;
517 s->insn_bits = pcl711_di_insn_bits;
519 /* Digital Output subdevice */
520 s = &dev->subdevices[3];
521 s->type = COMEDI_SUBD_DO;
522 s->subdev_flags = SDF_WRITABLE;
525 s->range_table = &range_digital;
526 s->insn_bits = pcl711_do_insn_bits;
529 pcl711_ao_write(dev, 0, 0x0);
530 pcl711_ao_write(dev, 1, 0x0);
535 static struct comedi_driver pcl711_driver = {
536 .driver_name = "pcl711",
537 .module = THIS_MODULE,
538 .attach = pcl711_attach,
539 .detach = comedi_legacy_detach,
540 .board_name = &boardtypes[0].name,
541 .num_names = ARRAY_SIZE(boardtypes),
542 .offset = sizeof(struct pcl711_board),
544 module_comedi_driver(pcl711_driver);
546 MODULE_AUTHOR("Comedi http://www.comedi.org");
547 MODULE_DESCRIPTION("Comedi driver for PCL-711 compatible boards");
548 MODULE_LICENSE("GPL");