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@stm.lbl.gov>
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 Dave Andruczyk <dave@tech.buffalostate.edu> also wrote a
29 driver for the PCL-711. I used a few ideas from his driver
30 here. His driver also has more comments, if you are
31 interested in understanding how this driver works.
32 http://tech.buffalostate.edu/~dave/driver/
34 The ACL-8112 driver was hacked from the sources of the PCL-711
35 driver (the 744 chip used on the 8112 is almost the same as
36 the 711b chip, but it has more I/O channels) by
37 Janne Jalkanen (jalkanen@cs.hut.fi) and
38 Erik Bunn (ebu@cs.hut.fi). Remerged with the PCL-711 driver
42 This driver supports both TRIGNOW and TRIGCLK,
43 but does not yet support DMA transfers. It also supports
44 both high (HG) and low (DG) versions of the card, though
45 the HG version has been untested.
49 #include <linux/kernel.h>
50 #include <linux/module.h>
51 #include <linux/sched.h>
53 #include <linux/malloc.h>
54 #include <linux/errno.h>
55 #include <linux/ioport.h>
56 #include <linux/delay.h>
57 #include <linux/interrupt.h>
58 #include <linux/timex.h>
59 #include <linux/timer.h>
61 #include <linux/comedidev.h>
66 #define PCL711_SIZE 16
71 #define PCL711_CTRCTL 3
72 #define PCL711_AD_LO 4
73 #define PCL711_DA0_LO 4
74 #define PCL711_AD_HI 5
75 #define PCL711_DA0_HI 5
76 #define PCL711_DI_LO 6
77 #define PCL711_DA1_LO 6
78 #define PCL711_DI_HI 7
79 #define PCL711_DA1_HI 7
80 #define PCL711_CLRINTR 8
83 #define PCL711_MODE 11
84 #define PCL711_SOFTTRIG 12
85 #define PCL711_DO_LO 13
86 #define PCL711_DO_HI 14
88 static comedi_lrange range_pcl711b_ai = { 5, {
95 static comedi_lrange range_acl8112hg_ai = { 12, {
109 static comedi_lrange range_acl8112dg_ai = { 9, {
127 #define PCL711_TIMEOUT 100
128 #define PCL711_DRDY 0x10
130 int i8253_osc_base = 500; /* 2 Mhz */
141 comedi_lrange * ai_range_type;
144 static boardtype boardtypes[] =
146 {"pcl711", 0, 0, 0, 5, 8, 1, 0, &range_bipolar5},
147 {"pcl711b", 1, 0, 0, 5, 8, 1, 7, &range_pcl711b_ai},
148 {"acl8112hg", 0, 1, 0, 12, 16, 2, 15, &range_acl8112hg_ai},
149 {"acl8112dg", 0, 1, 1, 9, 16, 2, 15, &range_acl8112dg_ai},
151 #define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype))
152 #define this_board ((boardtype *)dev->board_ptr)
154 static int pcl711_attach(comedi_device *dev,comedi_devconfig *it);
155 static int pcl711_detach(comedi_device *dev);
156 comedi_driver driver_pcl711={
157 driver_name: "pcl711",
159 attach: pcl711_attach,
160 detach: pcl711_detach,
161 board_name: boardtypes,
162 num_names: n_boardtypes,
163 offset: sizeof(boardtype),
174 #define devpriv ((pcl711_private *)dev->private)
176 static void pcl711_interrupt(int irq, void *d, struct pt_regs *regs)
180 comedi_device *dev = d;
181 comedi_subdevice *s = dev->subdevices + 0;
183 hi = inb(dev->iobase + PCL711_AD_HI);
184 lo = inb(dev->iobase + PCL711_AD_LO);
185 outb(0, dev->iobase + PCL711_CLRINTR);
187 data = (hi << 8) | lo;
189 if (!(--devpriv->ntrig)) {
190 if (this_board->is_8112) {
191 outb(1, dev->iobase + PCL711_MODE);
193 outb(0, dev->iobase + PCL711_MODE);
201 static void pcl711_set_changain(comedi_device * dev, int chan)
205 outb(CR_RANGE(chan), dev->iobase + PCL711_GAIN);
207 chan_register=CR_CHAN(chan);
209 if (this_board->is_8112) {
212 * Set the correct channel. The two channel banks are switched
213 * using the mask value.
214 * NB: To use differential channels, you should use mask = 0x30,
215 * but I haven't written the support for this yet. /JJ
218 if (chan_register >= 8){
219 chan_register = 0x20 | (chan_register & 0x7);
221 chan_register |= 0x10;
224 outb(chan_register, dev->iobase + PCL711_MUX);
228 static int pcl711_ai_mode0(comedi_device * dev, comedi_subdevice * s, comedi_trig * it)
231 int nmax=40; /* 1000 us / 25 us */
234 if(it->n<=nmax)nmax=it->n;
236 pcl711_set_changain(dev,it->chanlist[0]);
239 a sensible precaution to wait for the mux to
240 settle here. is 10us enough?
246 * Write the correct mode (software polling) and start polling by writing
247 * to the trigger register
249 outb(1, dev->iobase + PCL711_MODE);
251 if (this_board->is_8112) {
253 outb(0, dev->iobase + PCL711_SOFTTRIG);
258 hi = inb(dev->iobase + PCL711_AD_HI);
259 if (!(hi & PCL711_DRDY))
263 rt_printk("comedi%d: pcl711: A/D timeout\n", dev->minor);
267 lo = inb(dev->iobase + PCL711_AD_LO);
269 it->data[n] = ((hi & 0xf) << 8) | lo;
275 static int pcl711_ai_mode4(comedi_device * dev, comedi_subdevice * s, comedi_trig * it)
277 if (!this_board->is_pcl711b || dev->irq == 0)
280 pcl711_set_changain(dev,it->chanlist[0]);
283 * Set mode to "no internal trigger"
285 outb(devpriv->mode | 3, dev->iobase + PCL711_MODE);
291 static int pcl711_ai_mode1(comedi_device * dev, comedi_subdevice * s, comedi_trig * it)
298 pcl711_set_changain(dev,it->chanlist[0]);
302 * timer chip is an 8253, with timers 1 and 2
304 * 0x74 = Select Counter 1 | LSB/MSB | Mode=2 | Binary
305 * Mode 2 = Rate generator
307 * 0xb4 = Select Counter 2 | LSB/MSB | Mode=2 | Binary
310 i8253_cascade_ns_to_timer(i8253_osc_base,&timer1,&timer2,&it->trigvar,TRIG_ROUND_NEAREST);
312 outb(0x74, dev->iobase + PCL711_CTRCTL);
313 outb(timer1 & 0xff, dev->iobase + PCL711_CTR1);
314 outb((timer1 >> 8) & 0xff, dev->iobase + PCL711_CTR1);
315 outb(0xb4, dev->iobase + PCL711_CTRCTL);
316 outb(timer2 & 0xff, dev->iobase + PCL711_CTR2);
317 outb((timer2 >> 8) & 0xff, dev->iobase + PCL711_CTR2);
319 /* clear pending interrupts (just in case) */
320 outb(0, dev->iobase + PCL711_CLRINTR);
323 * Set mode to IRQ transfer
325 outb(devpriv->mode | 6, dev->iobase + PCL711_MODE);
333 static int pcl711_ao(comedi_device * dev, comedi_subdevice * s, comedi_trig * it)
335 int chan = CR_CHAN(it->chanlist[0]);
336 sampl_t data = it->data[0];
338 outb((data & 0xff), dev->iobase + (chan ? PCL711_DA1_LO : PCL711_DA0_LO));
339 outb((data >> 8), dev->iobase + (chan ? PCL711_DA1_HI : PCL711_DA0_HI));
344 /* Digital port read - Untested on 8112 */
345 static int pcl711_di(comedi_device * dev, comedi_subdevice * s, comedi_trig * it)
351 data = inb(dev->iobase + PCL711_DI_LO) |
352 (inb(dev->iobase + PCL711_DI_HI) << 8);
354 for(i=0;i<it->n_chan;i++){
355 chan=CR_CHAN(it->chanlist[i]);
356 it->data[i]=(data>>chan)&1;
362 /* Digital port write - Untested on 8112 */
363 static int pcl711_do(comedi_device * dev, comedi_subdevice * s, comedi_trig * it)
370 for(i=0;i<it->n_chan;i++){
371 chan=CR_CHAN(it->chanlist[i]);
377 outb(data & 0xff, dev->iobase + PCL711_DO_LO);
378 outb((data >> 8), dev->iobase + PCL711_DO_HI);
384 /* Free any resources that we have claimed */
385 static void free_resources(comedi_device * dev)
388 free_irq(dev->irq, dev);
391 release_region(dev->iobase, PCL711_SIZE);
395 static int pcl711_attach(comedi_device * dev, comedi_devconfig * it)
402 /* claim our I/O space */
404 iobase = it->options[0];
405 printk("comedi%d: pcl711: 0x%04x ", dev->minor, iobase);
406 if (check_region(iobase, PCL711_SIZE) < 0) {
407 printk("I/O port conflict\n");
410 request_region(dev->iobase, PCL711_SIZE, "pcl711");
411 dev->iobase = iobase;
413 /* there should be a sanity check here */
415 /* set up some name stuff */
416 dev->board_name = this_board->name;
419 irq = it->options[1];
420 if (irq < 0 || irq > this_board->maxirq) {
421 printk("irq out of range\n");
426 if (comedi_request_irq(irq, pcl711_interrupt, 0, "pcl711", dev)) {
427 printk("unable to allocate irq %d\n", irq);
431 printk("( irq = %d )\n", irq);
436 dev->n_subdevices = 4;
437 if((ret=alloc_subdevices(dev))<0)
439 if((ret=alloc_private(dev,sizeof(pcl711_private)))<0)
442 s = dev->subdevices + 0;
444 s->type = COMEDI_SUBD_AI;
445 s->subdev_flags = SDF_READABLE;
446 s->n_chan = this_board->n_aichan;
449 s->range_table = this_board->ai_range_type;
450 s->trig[0] = pcl711_ai_mode0;
451 s->trig[1] = pcl711_ai_mode1;
452 s->trig[4] = pcl711_ai_mode4;
456 s->type = COMEDI_SUBD_AO;
457 s->subdev_flags = SDF_WRITEABLE;
458 s->n_chan = this_board->n_aochan;
461 s->range_table = &range_bipolar5;
462 s->trig[0] = pcl711_ao;
465 /* 16-bit digital input */
466 s->type = COMEDI_SUBD_DI;
467 s->subdev_flags = SDF_READABLE;
470 s->len_chanlist = 16;
471 s->range_table = &range_digital;
472 s->trig[0] = pcl711_di;
475 /* 16-bit digital out */
476 s->type = COMEDI_SUBD_DO;
477 s->subdev_flags = SDF_WRITEABLE;
480 s->len_chanlist = 16;
481 s->range_table = &range_digital;
483 s->trig[0] = pcl711_do;
486 this is the "base value" for the mode register, which is
487 used for the irq on the PCL711
489 if(this_board->is_pcl711b){
490 devpriv->mode=(dev->irq<<4);
494 outb(0, dev->iobase + PCL711_DA0_LO);
495 outb(0, dev->iobase + PCL711_DA0_HI);
496 outb(0, dev->iobase + PCL711_DA1_LO);
497 outb(0, dev->iobase + PCL711_DA1_HI);
509 static int pcl711_detach(comedi_device * dev)
511 printk("comedi%d: pcl711: remove\n", dev->minor);
518 COMEDI_INITCLEANUP(driver_pcl711);