pcl726.c revision 747887a6210a6dc3dcfd40bdcc88ea65c85fcea3 
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
117struct pcl726_board {
118
119	const char *name;	// driver name
120	int n_aochan;		// num of D/A chans
121	int num_of_ranges;	// num of ranges
122	unsigned int IRQbits;	// allowed interrupts
123	unsigned int io_range;	// len of IO space
124	char have_dio;		// 1=card have DI/DO ports
125	int di_hi;		// ports for DI/DO operations
126	int di_lo;
127	int do_hi;
128	int do_lo;
129	const struct comedi_lrange *const *range_type_list;	// list of supported ranges
130};
131
132
133static const struct pcl726_board boardtypes[] = {
134	{"pcl726", 6, 6, 0x0000, PCL726_SIZE, 1,
135			PCL726_DI_HI, PCL726_DI_LO, PCL726_DO_HI, PCL726_DO_LO,
136		&rangelist_726[0],},
137	{"pcl727", 12, 4, 0x0000, PCL727_SIZE, 1,
138			PCL727_DI_HI, PCL727_DI_LO, PCL727_DO_HI, PCL727_DO_LO,
139		&rangelist_727[0],},
140	{"pcl728", 2, 6, 0x0000, PCL728_SIZE, 0,
141			0, 0, 0, 0,
142		&rangelist_728[0],},
143	{"acl6126", 6, 5, 0x96e8, PCL726_SIZE, 1,
144			PCL726_DI_HI, PCL726_DI_LO, PCL726_DO_HI, PCL726_DO_LO,
145		&rangelist_726[0],},
146	{"acl6128", 2, 6, 0x0000, PCL728_SIZE, 0,
147			0, 0, 0, 0,
148		&rangelist_728[0],},
149};
150
151#define n_boardtypes (sizeof(boardtypes)/sizeof(struct pcl726_board))
152#define this_board ((const struct pcl726_board *)dev->board_ptr)
153
154static struct comedi_driver driver_pcl726 = {
155      driver_name:"pcl726",
156      module:THIS_MODULE,
157      attach:pcl726_attach,
158      detach:pcl726_detach,
159      board_name:&boardtypes[0].name,
160      num_names:n_boardtypes,
161      offset:sizeof(struct pcl726_board),
162};
163
164COMEDI_INITCLEANUP(driver_pcl726);
165
166struct pcl726_private {
167
168	int bipolar[12];
169	const struct comedi_lrange *rangelist[12];
170	unsigned int ao_readback[12];
171};
172
173#define devpriv ((struct pcl726_private *)dev->private)
174
175static int pcl726_ao_insn(struct comedi_device * dev, struct comedi_subdevice * s,
176	struct comedi_insn * insn, unsigned int * data)
177{
178	int hi, lo;
179	int n;
180	int chan = CR_CHAN(insn->chanspec);
181
182	for (n = 0; n < insn->n; n++) {
183		lo = data[n] & 0xff;
184		hi = (data[n] >> 8) & 0xf;
185		if (devpriv->bipolar[chan])
186			hi ^= 0x8;
187		/*
188		 * the programming info did not say which order
189		 * to write bytes.  switch the order of the next
190		 * two lines if you get glitches.
191		 */
192		outb(hi, dev->iobase + PCL726_DAC0_HI + 2 * chan);
193		outb(lo, dev->iobase + PCL726_DAC0_LO + 2 * chan);
194		devpriv->ao_readback[chan] = data[n];
195	}
196
197	return n;
198}
199
200static int pcl726_ao_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
201	struct comedi_insn * insn, unsigned int * data)
202{
203	int chan = CR_CHAN(insn->chanspec);
204	int n;
205
206	for (n = 0; n < insn->n; n++) {
207		data[n] = devpriv->ao_readback[chan];
208	}
209	return n;
210}
211
212static int pcl726_di_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
213	struct comedi_insn * insn, unsigned int * data)
214{
215	if (insn->n != 2)
216		return -EINVAL;
217
218	data[1] = inb(dev->iobase + this_board->di_lo) |
219		(inb(dev->iobase + this_board->di_hi) << 8);
220
221	return 2;
222}
223
224static int pcl726_do_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
225	struct comedi_insn * insn, unsigned int * data)
226{
227	if (insn->n != 2)
228		return -EINVAL;
229
230	if (data[0]) {
231		s->state &= ~data[0];
232		s->state |= data[0] & data[1];
233	}
234	if (data[1] & 0x00ff)
235		outb(s->state & 0xff, dev->iobase + this_board->do_lo);
236	if (data[1] & 0xff00)
237		outb((s->state >> 8), dev->iobase + this_board->do_hi);
238
239	data[1] = s->state;
240
241	return 2;
242}
243
244static int pcl726_attach(struct comedi_device * dev, struct comedi_devconfig * it)
245{
246	struct comedi_subdevice *s;
247	unsigned long iobase;
248	unsigned int iorange;
249	int ret, i;
250#ifdef ACL6126_IRQ
251	unsigned int irq;
252#endif
253
254	iobase = it->options[0];
255	iorange = this_board->io_range;
256	printk("comedi%d: pcl726: board=%s, 0x%03lx ", dev->minor,
257		this_board->name, iobase);
258	if (!request_region(iobase, iorange, "pcl726")) {
259		printk("I/O port conflict\n");
260		return -EIO;
261	}
262
263	dev->iobase = iobase;
264
265	dev->board_name = this_board->name;
266
267	if ((ret = alloc_private(dev, sizeof(struct pcl726_private))) < 0)
268		return -ENOMEM;
269
270	for (i = 0; i < 12; i++) {
271		devpriv->bipolar[i] = 0;
272		devpriv->rangelist[i] = &range_unknown;
273	}
274
275#ifdef ACL6126_IRQ
276	irq = 0;
277	if (boardtypes[board].IRQbits != 0) {	/* board support IRQ */
278		irq = it->options[1];
279		devpriv->first_chan = 2;
280		if (irq) {	/* we want to use IRQ */
281			if (((1 << irq) & boardtypes[board].IRQbits) == 0) {
282				rt_printk
283					(", IRQ %d is out of allowed range, DISABLING IT",
284					irq);
285				irq = 0;	/* Bad IRQ */
286			} else {
287				if (comedi_request_irq(irq, interrupt_pcl818, 0,
288						"pcl726", dev)) {
289					rt_printk
290						(", unable to allocate IRQ %d, DISABLING IT",
291						irq);
292					irq = 0;	/* Can't use IRQ */
293				} else {
294					rt_printk(", irq=%d", irq);
295				}
296			}
297		}
298	}
299
300	dev->irq = irq;
301#endif
302
303	printk("\n");
304
305	if ((ret = alloc_subdevices(dev, 3)) < 0)
306		return ret;
307
308	s = dev->subdevices + 0;
309	/* ao */
310	s->type = COMEDI_SUBD_AO;
311	s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
312	s->n_chan = this_board->n_aochan;
313	s->maxdata = 0xfff;
314	s->len_chanlist = 1;
315	s->insn_write = pcl726_ao_insn;
316	s->insn_read = pcl726_ao_insn_read;
317	s->range_table_list = devpriv->rangelist;
318	for (i = 0; i < this_board->n_aochan; i++) {
319		int j;
320
321		j = it->options[2 + 1];
322		if ((j < 0) || (j >= this_board->num_of_ranges)) {
323			printk("Invalid range for channel %d! Must be 0<=%d<%d\n", i, j, this_board->num_of_ranges - 1);
324			j = 0;
325		}
326		devpriv->rangelist[i] = this_board->range_type_list[j];
327		if (devpriv->rangelist[i]->range[0].min ==
328			-devpriv->rangelist[i]->range[0].max)
329			devpriv->bipolar[i] = 1;	/* bipolar range */
330	}
331
332	s = dev->subdevices + 1;
333	/* di */
334	if (!this_board->have_dio) {
335		s->type = COMEDI_SUBD_UNUSED;
336	} else {
337		s->type = COMEDI_SUBD_DI;
338		s->subdev_flags = SDF_READABLE | SDF_GROUND;
339		s->n_chan = 16;
340		s->maxdata = 1;
341		s->len_chanlist = 1;
342		s->insn_bits = pcl726_di_insn_bits;
343		s->range_table = &range_digital;
344	}
345
346	s = dev->subdevices + 2;
347	/* do */
348	if (!this_board->have_dio) {
349		s->type = COMEDI_SUBD_UNUSED;
350	} else {
351		s->type = COMEDI_SUBD_DO;
352		s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
353		s->n_chan = 16;
354		s->maxdata = 1;
355		s->len_chanlist = 1;
356		s->insn_bits = pcl726_do_insn_bits;
357		s->range_table = &range_digital;
358	}
359
360	return 0;
361}
362
363static int pcl726_detach(struct comedi_device * dev)
364{
365//      printk("comedi%d: pcl726: remove\n",dev->minor);
366
367#ifdef ACL6126_IRQ
368	if (dev->irq) {
369		comedi_free_irq(dev->irq, dev);
370	}
371#endif
372
373	if (dev->iobase)
374		release_region(dev->iobase, this_board->io_range);
375
376	return 0;
377}
378