pcl726.c revision bf7f0610c6c215fb8a8cd26b697902810ee5b9e9 
1/*
2    comedi/drivers/pcl726.c
3
4    hardware driver for Advantech cards:
5     card:   PCL-726, PCL-727, PCL-728
6     driver: pcl726,  pcl727,  pcl728
7    and for ADLink cards:
8     card:   ACL-6126, ACL-6128
9     driver: acl6126,  acl6128
10
11    COMEDI - Linux Control and Measurement Device Interface
12    Copyright (C) 1998 David A. Schleef <ds@schleef.org>
13
14    This program is free software; you can redistribute it and/or modify
15    it under the terms of the GNU General Public License as published by
16    the Free Software Foundation; either version 2 of the License, or
17    (at your option) any later version.
18
19    This program is distributed in the hope that it will be useful,
20    but WITHOUT ANY WARRANTY; without even the implied warranty of
21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22    GNU General Public License for more details.
23
24    You should have received a copy of the GNU General Public License
25    along with this program; if not, write to the Free Software
26    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27
28*/
29/*
30Driver: pcl726
31Description: Advantech PCL-726 & compatibles
32Author: ds
33Status: untested
34Devices: [Advantech] PCL-726 (pcl726), PCL-727 (pcl727), PCL-728 (pcl728),
35  [ADLink] ACL-6126 (acl6126), ACL-6128 (acl6128)
36
37Interrupts are not supported.
38
39    Options for PCL-726:
40     [0] - IO Base
41     [2]...[7] - D/A output range for channel 1-6:
42               0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V,
43	       4: 4-20mA, 5: unknown (external reference)
44
45    Options for PCL-727:
46     [0] - IO Base
47     [2]...[13] - D/A output range for channel 1-12:
48               0: 0-5V, 1: 0-10V, 2: +/-5V,
49	       3: 4-20mA
50
51    Options for PCL-728 and ACL-6128:
52     [0] - IO Base
53     [2], [3] - D/A output range for channel 1 and 2:
54               0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V,
55	       4: 4-20mA, 5: 0-20mA
56
57    Options for ACL-6126:
58     [0] - IO Base
59     [1] - IRQ (0=disable, 3, 5, 6, 7, 9, 10, 11, 12, 15) (currently ignored)
60     [2]...[7] - D/A output range for channel 1-6:
61               0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V,
62	       4: 4-20mA
63*/
64
65/*
66    Thanks to Circuit Specialists for having programming info (!) on
67    their web page.  (http://www.cir.com/)
68*/
69
70#include "../comedidev.h"
71
72#include <linux/ioport.h>
73
74#undef ACL6126_IRQ		/* no interrupt support (yet) */
75
76#define PCL726_SIZE 16
77#define PCL727_SIZE 32
78#define PCL728_SIZE 8
79
80#define PCL726_DAC0_HI 0
81#define PCL726_DAC0_LO 1
82
83#define PCL726_DO_HI 12
84#define PCL726_DO_LO 13
85#define PCL726_DI_HI 14
86#define PCL726_DI_LO 15
87
88#define PCL727_DO_HI 24
89#define PCL727_DO_LO 25
90#define PCL727_DI_HI  0
91#define PCL727_DI_LO  1
92
93static const struct comedi_lrange range_4_20mA = { 1, {RANGE_mA(4, 20)} };
94static const struct comedi_lrange range_0_20mA = { 1, {RANGE_mA(0, 20)} };
95
96static const struct comedi_lrange *const rangelist_726[] = {
97	&range_unipolar5, &range_unipolar10,
98	&range_bipolar5, &range_bipolar10,
99	&range_4_20mA, &range_unknown
100};
101
102static const struct comedi_lrange *const rangelist_727[] = {
103	&range_unipolar5, &range_unipolar10,
104	&range_bipolar5,
105	&range_4_20mA
106};
107
108static const struct comedi_lrange *const rangelist_728[] = {
109	&range_unipolar5, &range_unipolar10,
110	&range_bipolar5, &range_bipolar10,
111	&range_4_20mA, &range_0_20mA
112};
113
114static int pcl726_attach(struct comedi_device * dev, struct comedi_devconfig * it);
115static int pcl726_detach(struct comedi_device * dev);
116
117typedef struct {
118	const char *name;	// driver name
119	int n_aochan;		// num of D/A chans
120	int num_of_ranges;	// num of ranges
121	unsigned int IRQbits;	// allowed interrupts
122	unsigned int io_range;	// len of IO space
123	char have_dio;		// 1=card have DI/DO ports
124	int di_hi;		// ports for DI/DO operations
125	int di_lo;
126	int do_hi;
127	int do_lo;
128	const struct comedi_lrange *const *range_type_list;	// list of supported ranges
129} boardtype;
130
131static const boardtype boardtypes[] = {
132	{"pcl726", 6, 6, 0x0000, PCL726_SIZE, 1,
133			PCL726_DI_HI, PCL726_DI_LO, PCL726_DO_HI, PCL726_DO_LO,
134		&rangelist_726[0],},
135	{"pcl727", 12, 4, 0x0000, PCL727_SIZE, 1,
136			PCL727_DI_HI, PCL727_DI_LO, PCL727_DO_HI, PCL727_DO_LO,
137		&rangelist_727[0],},
138	{"pcl728", 2, 6, 0x0000, PCL728_SIZE, 0,
139			0, 0, 0, 0,
140		&rangelist_728[0],},
141	{"acl6126", 6, 5, 0x96e8, PCL726_SIZE, 1,
142			PCL726_DI_HI, PCL726_DI_LO, PCL726_DO_HI, PCL726_DO_LO,
143		&rangelist_726[0],},
144	{"acl6128", 2, 6, 0x0000, PCL728_SIZE, 0,
145			0, 0, 0, 0,
146		&rangelist_728[0],},
147};
148
149#define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype))
150#define this_board ((const boardtype *)dev->board_ptr)
151
152static struct comedi_driver driver_pcl726 = {
153      driver_name:"pcl726",
154      module:THIS_MODULE,
155      attach:pcl726_attach,
156      detach:pcl726_detach,
157      board_name:&boardtypes[0].name,
158      num_names:n_boardtypes,
159      offset:sizeof(boardtype),
160};
161
162COMEDI_INITCLEANUP(driver_pcl726);
163
164struct pcl726_private {
165
166	int bipolar[12];
167	const struct comedi_lrange *rangelist[12];
168	unsigned int ao_readback[12];
169};
170
171#define devpriv ((struct pcl726_private *)dev->private)
172
173static int pcl726_ao_insn(struct comedi_device * dev, struct comedi_subdevice * s,
174	struct comedi_insn * insn, unsigned int * data)
175{
176	int hi, lo;
177	int n;
178	int chan = CR_CHAN(insn->chanspec);
179
180	for (n = 0; n < insn->n; n++) {
181		lo = data[n] & 0xff;
182		hi = (data[n] >> 8) & 0xf;
183		if (devpriv->bipolar[chan])
184			hi ^= 0x8;
185		/*
186		 * the programming info did not say which order
187		 * to write bytes.  switch the order of the next
188		 * two lines if you get glitches.
189		 */
190		outb(hi, dev->iobase + PCL726_DAC0_HI + 2 * chan);
191		outb(lo, dev->iobase + PCL726_DAC0_LO + 2 * chan);
192		devpriv->ao_readback[chan] = data[n];
193	}
194
195	return n;
196}
197
198static int pcl726_ao_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
199	struct comedi_insn * insn, unsigned int * data)
200{
201	int chan = CR_CHAN(insn->chanspec);
202	int n;
203
204	for (n = 0; n < insn->n; n++) {
205		data[n] = devpriv->ao_readback[chan];
206	}
207	return n;
208}
209
210static int pcl726_di_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
211	struct comedi_insn * insn, unsigned int * data)
212{
213	if (insn->n != 2)
214		return -EINVAL;
215
216	data[1] = inb(dev->iobase + this_board->di_lo) |
217		(inb(dev->iobase + this_board->di_hi) << 8);
218
219	return 2;
220}
221
222static int pcl726_do_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
223	struct comedi_insn * insn, unsigned int * data)
224{
225	if (insn->n != 2)
226		return -EINVAL;
227
228	if (data[0]) {
229		s->state &= ~data[0];
230		s->state |= data[0] & data[1];
231	}
232	if (data[1] & 0x00ff)
233		outb(s->state & 0xff, dev->iobase + this_board->do_lo);
234	if (data[1] & 0xff00)
235		outb((s->state >> 8), dev->iobase + this_board->do_hi);
236
237	data[1] = s->state;
238
239	return 2;
240}
241
242static int pcl726_attach(struct comedi_device * dev, struct comedi_devconfig * it)
243{
244	struct comedi_subdevice *s;
245	unsigned long iobase;
246	unsigned int iorange;
247	int ret, i;
248#ifdef ACL6126_IRQ
249	unsigned int irq;
250#endif
251
252	iobase = it->options[0];
253	iorange = this_board->io_range;
254	printk("comedi%d: pcl726: board=%s, 0x%03lx ", dev->minor,
255		this_board->name, iobase);
256	if (!request_region(iobase, iorange, "pcl726")) {
257		printk("I/O port conflict\n");
258		return -EIO;
259	}
260
261	dev->iobase = iobase;
262
263	dev->board_name = this_board->name;
264
265	if ((ret = alloc_private(dev, sizeof(struct pcl726_private))) < 0)
266		return -ENOMEM;
267
268	for (i = 0; i < 12; i++) {
269		devpriv->bipolar[i] = 0;
270		devpriv->rangelist[i] = &range_unknown;
271	}
272
273#ifdef ACL6126_IRQ
274	irq = 0;
275	if (boardtypes[board].IRQbits != 0) {	/* board support IRQ */
276		irq = it->options[1];
277		devpriv->first_chan = 2;
278		if (irq) {	/* we want to use IRQ */
279			if (((1 << irq) & boardtypes[board].IRQbits) == 0) {
280				rt_printk
281					(", IRQ %d is out of allowed range, DISABLING IT",
282					irq);
283				irq = 0;	/* Bad IRQ */
284			} else {
285				if (comedi_request_irq(irq, interrupt_pcl818, 0,
286						"pcl726", dev)) {
287					rt_printk
288						(", unable to allocate IRQ %d, DISABLING IT",
289						irq);
290					irq = 0;	/* Can't use IRQ */
291				} else {
292					rt_printk(", irq=%d", irq);
293				}
294			}
295		}
296	}
297
298	dev->irq = irq;
299#endif
300
301	printk("\n");
302
303	if ((ret = alloc_subdevices(dev, 3)) < 0)
304		return ret;
305
306	s = dev->subdevices + 0;
307	/* ao */
308	s->type = COMEDI_SUBD_AO;
309	s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
310	s->n_chan = this_board->n_aochan;
311	s->maxdata = 0xfff;
312	s->len_chanlist = 1;
313	s->insn_write = pcl726_ao_insn;
314	s->insn_read = pcl726_ao_insn_read;
315	s->range_table_list = devpriv->rangelist;
316	for (i = 0; i < this_board->n_aochan; i++) {
317		int j;
318
319		j = it->options[2 + 1];
320		if ((j < 0) || (j >= this_board->num_of_ranges)) {
321			printk("Invalid range for channel %d! Must be 0<=%d<%d\n", i, j, this_board->num_of_ranges - 1);
322			j = 0;
323		}
324		devpriv->rangelist[i] = this_board->range_type_list[j];
325		if (devpriv->rangelist[i]->range[0].min ==
326			-devpriv->rangelist[i]->range[0].max)
327			devpriv->bipolar[i] = 1;	/* bipolar range */
328	}
329
330	s = dev->subdevices + 1;
331	/* di */
332	if (!this_board->have_dio) {
333		s->type = COMEDI_SUBD_UNUSED;
334	} else {
335		s->type = COMEDI_SUBD_DI;
336		s->subdev_flags = SDF_READABLE | SDF_GROUND;
337		s->n_chan = 16;
338		s->maxdata = 1;
339		s->len_chanlist = 1;
340		s->insn_bits = pcl726_di_insn_bits;
341		s->range_table = &range_digital;
342	}
343
344	s = dev->subdevices + 2;
345	/* do */
346	if (!this_board->have_dio) {
347		s->type = COMEDI_SUBD_UNUSED;
348	} else {
349		s->type = COMEDI_SUBD_DO;
350		s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
351		s->n_chan = 16;
352		s->maxdata = 1;
353		s->len_chanlist = 1;
354		s->insn_bits = pcl726_do_insn_bits;
355		s->range_table = &range_digital;
356	}
357
358	return 0;
359}
360
361static int pcl726_detach(struct comedi_device * dev)
362{
363//      printk("comedi%d: pcl726: remove\n",dev->minor);
364
365#ifdef ACL6126_IRQ
366	if (dev->irq) {
367		comedi_free_irq(dev->irq, dev);
368	}
369#endif
370
371	if (dev->iobase)
372		release_region(dev->iobase, this_board->io_range);
373
374	return 0;
375}
376