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),
165 COMEDI_INITCLEANUP(driver_pcl711);
173 lsampl_t ao_readback[2];
176 #define devpriv ((pcl711_private *)dev->private)
178 static void pcl711_interrupt(int irq, void *d, struct pt_regs *regs)
182 comedi_device *dev = d;
183 comedi_subdevice *s = dev->subdevices + 0;
185 hi = inb(dev->iobase + PCL711_AD_HI);
186 lo = inb(dev->iobase + PCL711_AD_LO);
187 outb(0, dev->iobase + PCL711_CLRINTR);
189 data = (hi << 8) | lo;
191 if (!(--devpriv->ntrig)) {
192 if (this_board->is_8112) {
193 outb(1, dev->iobase + PCL711_MODE);
195 outb(0, dev->iobase + PCL711_MODE);
203 static void pcl711_set_changain(comedi_device * dev, int chan)
207 outb(CR_RANGE(chan), dev->iobase + PCL711_GAIN);
209 chan_register=CR_CHAN(chan);
211 if (this_board->is_8112) {
214 * Set the correct channel. The two channel banks are switched
215 * using the mask value.
216 * NB: To use differential channels, you should use mask = 0x30,
217 * but I haven't written the support for this yet. /JJ
220 if (chan_register >= 8){
221 chan_register = 0x20 | (chan_register & 0x7);
223 chan_register |= 0x10;
226 outb(chan_register, dev->iobase + PCL711_MUX);
230 static int pcl711_ai_insn(comedi_device *dev,comedi_subdevice *s,
231 comedi_insn *insn,lsampl_t *data)
236 pcl711_set_changain(dev,insn->chanspec);
239 a sensible precaution to wait for the mux to
240 settle here. is 10us enough?
244 for(n=0;n<insn->n;n++){
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))
262 rt_printk("comedi%d: pcl711: A/D timeout\n", dev->minor);
266 lo = inb(dev->iobase + PCL711_AD_LO);
268 data[n] = ((hi & 0xf) << 8) | lo;
274 static int pcl711_ai_mode4(comedi_device * dev, comedi_subdevice * s, comedi_trig * it)
276 if (!this_board->is_pcl711b || dev->irq == 0)
279 pcl711_set_changain(dev,it->chanlist[0]);
282 * Set mode to "no internal trigger"
284 outb(devpriv->mode | 3, dev->iobase + PCL711_MODE);
290 static int pcl711_ai_mode1(comedi_device * dev, comedi_subdevice * s, comedi_trig * it)
297 pcl711_set_changain(dev,it->chanlist[0]);
301 * timer chip is an 8253, with timers 1 and 2
303 * 0x74 = Select Counter 1 | LSB/MSB | Mode=2 | Binary
304 * Mode 2 = Rate generator
306 * 0xb4 = Select Counter 2 | LSB/MSB | Mode=2 | Binary
309 i8253_cascade_ns_to_timer(i8253_osc_base,&timer1,&timer2,&it->trigvar,TRIG_ROUND_NEAREST);
311 outb(0x74, dev->iobase + PCL711_CTRCTL);
312 outb(timer1 & 0xff, dev->iobase + PCL711_CTR1);
313 outb((timer1 >> 8) & 0xff, dev->iobase + PCL711_CTR1);
314 outb(0xb4, dev->iobase + PCL711_CTRCTL);
315 outb(timer2 & 0xff, dev->iobase + PCL711_CTR2);
316 outb((timer2 >> 8) & 0xff, dev->iobase + PCL711_CTR2);
318 /* clear pending interrupts (just in case) */
319 outb(0, dev->iobase + PCL711_CLRINTR);
322 * Set mode to IRQ transfer
324 outb(devpriv->mode | 6, dev->iobase + PCL711_MODE);
332 static int pcl711_ao_insn(comedi_device *dev,comedi_subdevice *s,
333 comedi_insn *insn,lsampl_t *data)
336 int chan = CR_CHAN(insn->chanspec);
338 for(n=0;n<insn->n;n++){
339 outb((data[n] & 0xff), dev->iobase + (chan ? PCL711_DA1_LO : PCL711_DA0_LO));
340 outb((data[n] >> 8), dev->iobase + (chan ? PCL711_DA1_HI : PCL711_DA0_HI));
342 devpriv->ao_readback[chan] = data[n];
348 static int pcl711_ao_insn_read(comedi_device *dev,comedi_subdevice *s,
349 comedi_insn *insn,lsampl_t *data)
352 int chan = CR_CHAN(insn->chanspec);
354 for(n=0;n<insn->n;n++){
355 data[n] = devpriv->ao_readback[chan];
362 /* Digital port read - Untested on 8112 */
363 static int pcl711_di_insn_bits(comedi_device * dev, comedi_subdevice * s,
364 comedi_insn *insn,lsampl_t *data)
366 if(insn->n!=2)return -EINVAL;
368 data[1] = inb(dev->iobase + PCL711_DI_LO) |
369 (inb(dev->iobase + PCL711_DI_HI) << 8);
374 /* Digital port write - Untested on 8112 */
375 static int pcl711_do_insn_bits(comedi_device * dev, comedi_subdevice * s,
376 comedi_insn *insn,lsampl_t *data)
378 if(insn->n!=2)return -EINVAL;
381 s->state &= ~data[0];
382 s->state |= data[0]&data[1];
385 outb(s->state & 0xff, dev->iobase + PCL711_DO_LO);
387 outb((s->state >> 8), dev->iobase + PCL711_DO_HI);
394 /* Free any resources that we have claimed */
395 static int pcl711_detach(comedi_device * dev)
397 printk("comedi%d: pcl711: remove\n", dev->minor);
400 free_irq(dev->irq, dev);
403 release_region(dev->iobase, PCL711_SIZE);
407 static int pcl711_attach(comedi_device * dev, comedi_devconfig * it)
414 /* claim our I/O space */
416 iobase = it->options[0];
417 printk("comedi%d: pcl711: 0x%04x ", dev->minor, iobase);
418 if (check_region(iobase, PCL711_SIZE) < 0) {
419 printk("I/O port conflict\n");
422 request_region(dev->iobase, PCL711_SIZE, "pcl711");
423 dev->iobase = iobase;
425 /* there should be a sanity check here */
427 /* set up some name stuff */
428 dev->board_name = this_board->name;
431 irq = it->options[1];
432 if (irq < 0 || irq > this_board->maxirq) {
433 printk("irq out of range\n");
438 if (comedi_request_irq(irq, pcl711_interrupt, 0, "pcl711", dev)) {
439 printk("unable to allocate irq %d\n", irq);
443 printk("( irq = %d )\n", irq);
448 dev->n_subdevices = 4;
449 if((ret=alloc_subdevices(dev))<0)
451 if((ret=alloc_private(dev,sizeof(pcl711_private)))<0)
454 s = dev->subdevices + 0;
456 s->type = COMEDI_SUBD_AI;
457 s->subdev_flags = SDF_READABLE;
458 s->n_chan = this_board->n_aichan;
461 s->range_table = this_board->ai_range_type;
462 s->insn_read = pcl711_ai_insn;
463 s->trig[1] = pcl711_ai_mode1;
464 s->trig[4] = pcl711_ai_mode4;
468 s->type = COMEDI_SUBD_AO;
469 s->subdev_flags = SDF_WRITEABLE;
470 s->n_chan = this_board->n_aochan;
473 s->range_table = &range_bipolar5;
474 s->insn_write = pcl711_ao_insn;
475 s->insn_read = pcl711_ao_insn_read;
478 /* 16-bit digital input */
479 s->type = COMEDI_SUBD_DI;
480 s->subdev_flags = SDF_READABLE;
483 s->len_chanlist = 16;
484 s->range_table = &range_digital;
485 s->insn_bits = pcl711_di_insn_bits;
488 /* 16-bit digital out */
489 s->type = COMEDI_SUBD_DO;
490 s->subdev_flags = SDF_WRITEABLE;
493 s->len_chanlist = 16;
494 s->range_table = &range_digital;
496 s->insn_bits = pcl711_do_insn_bits;
499 this is the "base value" for the mode register, which is
500 used for the irq on the PCL711
502 if(this_board->is_pcl711b){
503 devpriv->mode=(dev->irq<<4);
507 outb(0, dev->iobase + PCL711_DA0_LO);
508 outb(0, dev->iobase + PCL711_DA0_HI);
509 outb(0, dev->iobase + PCL711_DA1_LO);
510 outb(0, dev->iobase + PCL711_DA1_HI);