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), PCL-711B (pcl711b),
26 * [ADLink] ACL-8112HG (acl8112hg), ACL-8112DG (acl8112dg)
27 * Author: David A. Schleef <ds@schleef.org>
28 * Janne Jalkanen <jalkanen@cs.hut.fi>
29 * Eric Bunn <ebu@cs.hut.fi>
31 * Status: mostly complete
33 * Configuration Options:
38 #include <linux/module.h>
39 #include <linux/delay.h>
40 #include <linux/interrupt.h>
42 #include "../comedidev.h"
44 #include "comedi_fc.h"
48 * I/O port register map
50 #define PCL711_TIMER_BASE 0x00
51 #define PCL711_AI_LSB_REG 0x04
52 #define PCL711_AI_MSB_REG 0x05
53 #define PCL711_AI_MSB_DRDY (1 << 4)
54 #define PCL711_AO_LSB_REG(x) (0x04 + ((x) * 2))
55 #define PCL711_AO_MSB_REG(x) (0x05 + ((x) * 2))
56 #define PCL711_DI_LSB_REG 0x06
57 #define PCL711_DI_MSB_REG 0x07
58 #define PCL711_INT_STAT_REG 0x08
59 #define PCL711_INT_STAT_CLR (0 << 0) /* any value will work */
60 #define PCL711_AI_GAIN_REG 0x09
61 #define PCL711_AI_GAIN(x) (((x) & 0xf) << 0)
62 #define PCL711_MUX_REG 0x0a
63 #define PCL711_MUX_CHAN(x) (((x) & 0xf) << 0)
64 #define PCL711_MUX_CS0 (1 << 4)
65 #define PCL711_MUX_CS1 (1 << 5)
66 #define PCL711_MUX_DIFF (PCL711_MUX_CS0 | PCL711_MUX_CS1)
67 #define PCL711_MODE_REG 0x0b
68 #define PCL711_MODE_DEFAULT (0 << 0)
69 #define PCL711_MODE_SOFTTRIG (1 << 0)
70 #define PCL711_MODE_EXT (2 << 0)
71 #define PCL711_MODE_EXT_IRQ (3 << 0)
72 #define PCL711_MODE_PACER (4 << 0)
73 #define PCL711_MODE_PACER_IRQ (6 << 0)
74 #define PCL711_MODE_IRQ(x) (((x) & 0x7) << 4)
75 #define PCL711_SOFTTRIG_REG 0x0c
76 #define PCL711_SOFTTRIG (0 << 0) /* any value will work */
77 #define PCL711_DO_LSB_REG 0x0d
78 #define PCL711_DO_MSB_REG 0x0e
80 static const struct comedi_lrange range_pcl711b_ai = {
90 static const struct comedi_lrange range_acl8112hg_ai = {
107 static const struct comedi_lrange range_acl8112dg_ai = {
121 struct pcl711_board {
126 const struct comedi_lrange *ai_range_type;
129 static const struct pcl711_board boardtypes[] = {
134 .ai_range_type = &range_bipolar5,
140 .ai_range_type = &range_pcl711b_ai,
146 .ai_range_type = &range_acl8112hg_ai,
152 .ai_range_type = &range_acl8112dg_ai,
156 struct pcl711_private {
157 unsigned int divisor1;
158 unsigned int divisor2;
161 static void pcl711_ai_set_mode(struct comedi_device *dev, unsigned int mode)
164 * The pcl711b board uses bits in the mode register to select the
165 * interrupt. The other boards supported by this driver all use
166 * jumpers on the board.
168 * Enables the interrupt when needed on the pcl711b board. These
169 * bits do nothing on the other boards.
171 if (mode == PCL711_MODE_EXT_IRQ || mode == PCL711_MODE_PACER_IRQ)
172 mode |= PCL711_MODE_IRQ(dev->irq);
174 outb(mode, dev->iobase + PCL711_MODE_REG);
177 static unsigned int pcl711_ai_get_sample(struct comedi_device *dev,
178 struct comedi_subdevice *s)
182 val = inb(dev->iobase + PCL711_AI_MSB_REG) << 8;
183 val |= inb(dev->iobase + PCL711_AI_LSB_REG);
185 return val & s->maxdata;
188 static int pcl711_ai_cancel(struct comedi_device *dev,
189 struct comedi_subdevice *s)
191 outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
192 pcl711_ai_set_mode(dev, PCL711_MODE_SOFTTRIG);
196 static irqreturn_t pcl711_interrupt(int irq, void *d)
198 struct comedi_device *dev = d;
199 struct comedi_subdevice *s = dev->read_subdev;
200 struct comedi_cmd *cmd = &s->async->cmd;
203 if (!dev->attached) {
204 dev_err(dev->class_dev, "spurious interrupt\n");
208 data = pcl711_ai_get_sample(dev, s);
210 outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
212 comedi_buf_write_samples(s, &data, 1);
214 if (cmd->stop_src == TRIG_COUNT &&
215 s->async->scans_done >= cmd->stop_arg)
216 s->async->events |= COMEDI_CB_EOA;
218 comedi_handle_events(dev, s);
223 static void pcl711_set_changain(struct comedi_device *dev,
224 struct comedi_subdevice *s,
225 unsigned int chanspec)
227 unsigned int chan = CR_CHAN(chanspec);
228 unsigned int range = CR_RANGE(chanspec);
229 unsigned int aref = CR_AREF(chanspec);
230 unsigned int mux = 0;
232 outb(PCL711_AI_GAIN(range), dev->iobase + PCL711_AI_GAIN_REG);
235 /* Select the correct MPC508A chip */
236 if (aref == AREF_DIFF) {
238 mux |= PCL711_MUX_DIFF;
241 mux |= PCL711_MUX_CS0;
243 mux |= PCL711_MUX_CS1;
246 outb(mux | PCL711_MUX_CHAN(chan), dev->iobase + PCL711_MUX_REG);
249 static int pcl711_ai_eoc(struct comedi_device *dev,
250 struct comedi_subdevice *s,
251 struct comedi_insn *insn,
252 unsigned long context)
256 status = inb(dev->iobase + PCL711_AI_MSB_REG);
257 if ((status & PCL711_AI_MSB_DRDY) == 0)
262 static int pcl711_ai_insn_read(struct comedi_device *dev,
263 struct comedi_subdevice *s,
264 struct comedi_insn *insn,
270 pcl711_set_changain(dev, s, insn->chanspec);
272 pcl711_ai_set_mode(dev, PCL711_MODE_SOFTTRIG);
274 for (i = 0; i < insn->n; i++) {
275 outb(PCL711_SOFTTRIG, dev->iobase + PCL711_SOFTTRIG_REG);
277 ret = comedi_timeout(dev, s, insn, pcl711_ai_eoc, 0);
281 data[i] = pcl711_ai_get_sample(dev, s);
287 static int pcl711_ai_cmdtest(struct comedi_device *dev,
288 struct comedi_subdevice *s, struct comedi_cmd *cmd)
290 struct pcl711_private *devpriv = dev->private;
294 /* Step 1 : check if triggers are trivially valid */
296 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
297 err |= cfc_check_trigger_src(&cmd->scan_begin_src,
298 TRIG_TIMER | TRIG_EXT);
299 err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
300 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
301 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
306 /* Step 2a : make sure trigger sources are unique */
308 err |= cfc_check_trigger_is_unique(cmd->scan_begin_src);
309 err |= cfc_check_trigger_is_unique(cmd->stop_src);
311 /* Step 2b : and mutually compatible */
316 /* Step 3: check if arguments are trivially valid */
318 err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
320 if (cmd->scan_begin_src == TRIG_EXT) {
321 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
323 #define MAX_SPEED 1000
324 err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
328 err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
329 err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
331 if (cmd->stop_src == TRIG_COUNT)
332 err |= cfc_check_trigger_arg_min(&cmd->stop_arg, 1);
334 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
341 if (cmd->scan_begin_src == TRIG_TIMER) {
342 arg = cmd->scan_begin_arg;
343 i8253_cascade_ns_to_timer(I8254_OSC_BASE_2MHZ,
347 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
356 static void pcl711_ai_load_counters(struct comedi_device *dev)
358 struct pcl711_private *devpriv = dev->private;
359 unsigned long timer_base = dev->iobase + PCL711_TIMER_BASE;
361 i8254_set_mode(timer_base, 0, 1, I8254_MODE2 | I8254_BINARY);
362 i8254_set_mode(timer_base, 0, 2, I8254_MODE2 | I8254_BINARY);
364 i8254_write(timer_base, 0, 1, devpriv->divisor1);
365 i8254_write(timer_base, 0, 2, devpriv->divisor2);
368 static int pcl711_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
370 struct comedi_cmd *cmd = &s->async->cmd;
372 pcl711_set_changain(dev, s, cmd->chanlist[0]);
374 if (cmd->scan_begin_src == TRIG_TIMER) {
375 pcl711_ai_load_counters(dev);
376 outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
377 pcl711_ai_set_mode(dev, PCL711_MODE_PACER_IRQ);
379 pcl711_ai_set_mode(dev, PCL711_MODE_EXT_IRQ);
385 static void pcl711_ao_write(struct comedi_device *dev,
386 unsigned int chan, unsigned int val)
388 outb(val & 0xff, dev->iobase + PCL711_AO_LSB_REG(chan));
389 outb((val >> 8) & 0xff, dev->iobase + PCL711_AO_MSB_REG(chan));
392 static int pcl711_ao_insn_write(struct comedi_device *dev,
393 struct comedi_subdevice *s,
394 struct comedi_insn *insn,
397 unsigned int chan = CR_CHAN(insn->chanspec);
398 unsigned int val = s->readback[chan];
401 for (i = 0; i < insn->n; i++) {
403 pcl711_ao_write(dev, chan, val);
405 s->readback[chan] = val;
410 static int pcl711_di_insn_bits(struct comedi_device *dev,
411 struct comedi_subdevice *s,
412 struct comedi_insn *insn,
417 val = inb(dev->iobase + PCL711_DI_LSB_REG);
418 val |= (inb(dev->iobase + PCL711_DI_MSB_REG) << 8);
425 static int pcl711_do_insn_bits(struct comedi_device *dev,
426 struct comedi_subdevice *s,
427 struct comedi_insn *insn,
432 mask = comedi_dio_update_state(s, data);
435 outb(s->state & 0xff, dev->iobase + PCL711_DO_LSB_REG);
437 outb((s->state >> 8), dev->iobase + PCL711_DO_MSB_REG);
445 static int pcl711_attach(struct comedi_device *dev, struct comedi_devconfig *it)
447 const struct pcl711_board *board = dev->board_ptr;
448 struct pcl711_private *devpriv;
449 struct comedi_subdevice *s;
452 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
456 ret = comedi_request_region(dev, it->options[0], 0x10);
460 if (it->options[1] && it->options[1] <= board->maxirq) {
461 ret = request_irq(it->options[1], pcl711_interrupt, 0,
462 dev->board_name, dev);
464 dev->irq = it->options[1];
467 ret = comedi_alloc_subdevices(dev, 4);
471 /* Analog Input subdevice */
472 s = &dev->subdevices[0];
473 s->type = COMEDI_SUBD_AI;
474 s->subdev_flags = SDF_READABLE | SDF_GROUND;
475 if (board->n_aichan > 8)
476 s->subdev_flags |= SDF_DIFF;
477 s->n_chan = board->n_aichan;
479 s->range_table = board->ai_range_type;
480 s->insn_read = pcl711_ai_insn_read;
482 dev->read_subdev = s;
483 s->subdev_flags |= SDF_CMD_READ;
485 s->do_cmdtest = pcl711_ai_cmdtest;
486 s->do_cmd = pcl711_ai_cmd;
487 s->cancel = pcl711_ai_cancel;
490 /* Analog Output subdevice */
491 s = &dev->subdevices[1];
492 s->type = COMEDI_SUBD_AO;
493 s->subdev_flags = SDF_WRITABLE;
494 s->n_chan = board->n_aochan;
496 s->range_table = &range_bipolar5;
497 s->insn_write = pcl711_ao_insn_write;
499 ret = comedi_alloc_subdev_readback(s);
503 /* Digital Input subdevice */
504 s = &dev->subdevices[2];
505 s->type = COMEDI_SUBD_DI;
506 s->subdev_flags = SDF_READABLE;
509 s->range_table = &range_digital;
510 s->insn_bits = pcl711_di_insn_bits;
512 /* Digital Output subdevice */
513 s = &dev->subdevices[3];
514 s->type = COMEDI_SUBD_DO;
515 s->subdev_flags = SDF_WRITABLE;
518 s->range_table = &range_digital;
519 s->insn_bits = pcl711_do_insn_bits;
522 pcl711_ao_write(dev, 0, 0x0);
523 pcl711_ao_write(dev, 1, 0x0);
528 static struct comedi_driver pcl711_driver = {
529 .driver_name = "pcl711",
530 .module = THIS_MODULE,
531 .attach = pcl711_attach,
532 .detach = comedi_legacy_detach,
533 .board_name = &boardtypes[0].name,
534 .num_names = ARRAY_SIZE(boardtypes),
535 .offset = sizeof(struct pcl711_board),
537 module_comedi_driver(pcl711_driver);
539 MODULE_AUTHOR("Comedi http://www.comedi.org");
540 MODULE_DESCRIPTION("Comedi driver for PCL-711 compatible boards");
541 MODULE_LICENSE("GPL");