pcl726.c revision 00a224316fdc0e95c779534acde02579c16e327e 
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 comedi_lrange range_4_20mA = { 1, {RANGE_mA(4, 20)} };
94static const comedi_lrange range_0_20mA = { 1, {RANGE_mA(0, 20)} };
95
96static const 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 comedi_lrange *const rangelist_727[] = {
103	&range_unipolar5, &range_unipolar10,
104	&range_bipolar5,
105	&range_4_20mA
106};
107
108static const 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(comedi_device * dev, comedi_devconfig * it);
115static int pcl726_detach(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 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 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
164typedef struct {
165	int bipolar[12];
166	const comedi_lrange *rangelist[12];
167	lsampl_t ao_readback[12];
168} pcl726_private;
169#define devpriv ((pcl726_private *)dev->private)
170
171static int pcl726_ao_insn(comedi_device * dev, comedi_subdevice * s,
172	comedi_insn * insn, lsampl_t * data)
173{
174	int hi, lo;
175	int n;
176	int chan = CR_CHAN(insn->chanspec);
177
178	for (n = 0; n < insn->n; n++) {
179		lo = data[n] & 0xff;
180		hi = (data[n] >> 8) & 0xf;
181		if (devpriv->bipolar[chan])
182			hi ^= 0x8;
183		/*
184		 * the programming info did not say which order
185		 * to write bytes.  switch the order of the next
186		 * two lines if you get glitches.
187		 */
188		outb(hi, dev->iobase + PCL726_DAC0_HI + 2 * chan);
189		outb(lo, dev->iobase + PCL726_DAC0_LO + 2 * chan);
190		devpriv->ao_readback[chan] = data[n];
191	}
192
193	return n;
194}
195
196static int pcl726_ao_insn_read(comedi_device * dev, comedi_subdevice * s,
197	comedi_insn * insn, lsampl_t * data)
198{
199	int chan = CR_CHAN(insn->chanspec);
200	int n;
201
202	for (n = 0; n < insn->n; n++) {
203		data[n] = devpriv->ao_readback[chan];
204	}
205	return n;
206}
207
208static int pcl726_di_insn_bits(comedi_device * dev, comedi_subdevice * s,
209	comedi_insn * insn, lsampl_t * data)
210{
211	if (insn->n != 2)
212		return -EINVAL;
213
214	data[1] = inb(dev->iobase + this_board->di_lo) |
215		(inb(dev->iobase + this_board->di_hi) << 8);
216
217	return 2;
218}
219
220static int pcl726_do_insn_bits(comedi_device * dev, comedi_subdevice * s,
221	comedi_insn * insn, lsampl_t * data)
222{
223	if (insn->n != 2)
224		return -EINVAL;
225
226	if (data[0]) {
227		s->state &= ~data[0];
228		s->state |= data[0] & data[1];
229	}
230	if (data[1] & 0x00ff)
231		outb(s->state & 0xff, dev->iobase + this_board->do_lo);
232	if (data[1] & 0xff00)
233		outb((s->state >> 8), dev->iobase + this_board->do_hi);
234
235	data[1] = s->state;
236
237	return 2;
238}
239
240static int pcl726_attach(comedi_device * dev, comedi_devconfig * it)
241{
242	comedi_subdevice *s;
243	unsigned long iobase;
244	unsigned int iorange;
245	int ret, i;
246#ifdef ACL6126_IRQ
247	unsigned int irq;
248#endif
249
250	iobase = it->options[0];
251	iorange = this_board->io_range;
252	printk("comedi%d: pcl726: board=%s, 0x%03lx ", dev->minor,
253		this_board->name, iobase);
254	if (!request_region(iobase, iorange, "pcl726")) {
255		printk("I/O port conflict\n");
256		return -EIO;
257	}
258
259	dev->iobase = iobase;
260
261	dev->board_name = this_board->name;
262
263	if ((ret = alloc_private(dev, sizeof(pcl726_private))) < 0)
264		return -ENOMEM;
265
266	for (i = 0; i < 12; i++) {
267		devpriv->bipolar[i] = 0;
268		devpriv->rangelist[i] = &range_unknown;
269	}
270
271#ifdef ACL6126_IRQ
272	irq = 0;
273	if (boardtypes[board].IRQbits != 0) {	/* board support IRQ */
274		irq = it->options[1];
275		devpriv->first_chan = 2;
276		if (irq) {	/* we want to use IRQ */
277			if (((1 << irq) & boardtypes[board].IRQbits) == 0) {
278				rt_printk
279					(", IRQ %d is out of allowed range, DISABLING IT",
280					irq);
281				irq = 0;	/* Bad IRQ */
282			} else {
283				if (comedi_request_irq(irq, interrupt_pcl818, 0,
284						"pcl726", dev)) {
285					rt_printk
286						(", unable to allocate IRQ %d, DISABLING IT",
287						irq);
288					irq = 0;	/* Can't use IRQ */
289				} else {
290					rt_printk(", irq=%d", irq);
291				}
292			}
293		}
294	}
295
296	dev->irq = irq;
297#endif
298
299	printk("\n");
300
301	if ((ret = alloc_subdevices(dev, 3)) < 0)
302		return ret;
303
304	s = dev->subdevices + 0;
305	/* ao */
306	s->type = COMEDI_SUBD_AO;
307	s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
308	s->n_chan = this_board->n_aochan;
309	s->maxdata = 0xfff;
310	s->len_chanlist = 1;
311	s->insn_write = pcl726_ao_insn;
312	s->insn_read = pcl726_ao_insn_read;
313	s->range_table_list = devpriv->rangelist;
314	for (i = 0; i < this_board->n_aochan; i++) {
315		int j;
316
317		j = it->options[2 + 1];
318		if ((j < 0) || (j >= this_board->num_of_ranges)) {
319			printk("Invalid range for channel %d! Must be 0<=%d<%d\n", i, j, this_board->num_of_ranges - 1);
320			j = 0;
321		}
322		devpriv->rangelist[i] = this_board->range_type_list[j];
323		if (devpriv->rangelist[i]->range[0].min ==
324			-devpriv->rangelist[i]->range[0].max)
325			devpriv->bipolar[i] = 1;	/* bipolar range */
326	}
327
328	s = dev->subdevices + 1;
329	/* di */
330	if (!this_board->have_dio) {
331		s->type = COMEDI_SUBD_UNUSED;
332	} else {
333		s->type = COMEDI_SUBD_DI;
334		s->subdev_flags = SDF_READABLE | SDF_GROUND;
335		s->n_chan = 16;
336		s->maxdata = 1;
337		s->len_chanlist = 1;
338		s->insn_bits = pcl726_di_insn_bits;
339		s->range_table = &range_digital;
340	}
341
342	s = dev->subdevices + 2;
343	/* do */
344	if (!this_board->have_dio) {
345		s->type = COMEDI_SUBD_UNUSED;
346	} else {
347		s->type = COMEDI_SUBD_DO;
348		s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
349		s->n_chan = 16;
350		s->maxdata = 1;
351		s->len_chanlist = 1;
352		s->insn_bits = pcl726_do_insn_bits;
353		s->range_table = &range_digital;
354	}
355
356	return 0;
357}
358
359static int pcl726_detach(comedi_device * dev)
360{
361//      printk("comedi%d: pcl726: remove\n",dev->minor);
362
363#ifdef ACL6126_IRQ
364	if (dev->irq) {
365		comedi_free_irq(dev->irq, dev);
366	}
367#endif
368
369	if (dev->iobase)
370		release_region(dev->iobase, this_board->io_range);
371
372	return 0;
373}
374