2 comedi/drivers/adq12b.c
3 driver for MicroAxial ADQ12-B data acquisition and control card
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 Description: driver for MicroAxial ADQ12-B data acquisition and control card
26 Devices: [MicroAxial] ADQ12-B (adq12b)
27 Author: jeremy theler <thelerg@ib.cnea.gov.ar>
28 Updated: Thu, 21 Feb 2008 02:56:27 -0300
31 Driver for the acquisition card ADQ12-B (without any add-on).
33 - Analog input is subdevice 0 (16 channels single-ended or 8 differential)
34 - Digital input is subdevice 1 (5 channels)
35 - Digital output is subdevice 1 (8 channels)
36 - The PACER is not supported in this version
38 If you do not specify any options, they will default to
40 # comedi_config /dev/comedi0 adq12b 0x300,0,0
42 option 1: I/O base address. The following table is provided as a help
43 of the hardware jumpers.
46 0x300 1 (factory default)
53 option 2: unipolar/bipolar ADC selection: 0 -> bipolar, 1 -> unipolar
55 selection comedi_config option JUB
56 bipolar 0 2-3 (factory default)
59 option 3: single-ended/differential AI selection: 0 -> SE, 1 -> differential
61 selection comedi_config option JCHA JCHB
62 single-ended 0 1-2 1-2 (factory default)
63 differential 1 2-3 2-3
65 written by jeremy theler <thelerg@ib.cnea.gov.ar>
68 commission nacional de energia atomica
69 universidad nacional de cuyo
73 + changed supported devices string (missused the [] and ())
81 #include "../comedidev.h"
83 /* address scheme (page 2.17 of the manual) */
84 #define ADQ12B_SIZE 16
86 #define ADQ12B_CTREG 0x00
87 #define ADQ12B_STINR 0x00
88 #define ADQ12B_OUTBR 0x04
89 #define ADQ12B_ADLOW 0x08
90 #define ADQ12B_ADHIG 0x09
91 #define ADQ12B_CONT0 0x0c
92 #define ADQ12B_CONT1 0x0d
93 #define ADQ12B_CONT2 0x0e
94 #define ADQ12B_COWORD 0x0f
96 /* mask of the bit at STINR to check end of conversion */
97 #define ADQ12B_EOC 0x20
101 /* available ranges through the PGA gains */
102 static const struct comedi_lrange range_adq12b_ai_bipolar
= { 4, {
110 static const struct comedi_lrange range_adq12b_ai_unipolar
= { 4, {
119 struct adq12b_board
{
128 static const struct adq12b_board adq12b_boards
[] = {
136 /* potentially, more adq-based deviced will be added */
139 .ai_chans = 16, // this is just for reference, hardcoded again later
146 #define thisboard ((const struct adq12b_board *)dev->board_ptr)
148 struct adq12b_private
{
149 int unipolar
; /* option 2 of comedi_config (1 is iobase) */
150 int differential
; /* option 3 of comedi_config */
153 unsigned int digital_state
;
156 #define devpriv ((struct adq12b_private *)dev->private)
159 * The struct comedi_driver structure tells the Comedi core module
160 * which functions to call to configure/deconfigure (attach/detach)
161 * the board, and also about the kernel module that contains
164 static int adq12b_attach(struct comedi_device
*dev
,
165 struct comedi_devconfig
*it
);
166 static int adq12b_detach(struct comedi_device
*dev
);
168 static struct comedi_driver driver_adq12b
= {
169 .driver_name
= "adq12b",
170 .module
= THIS_MODULE
,
171 .attach
= adq12b_attach
,
172 .detach
= adq12b_detach
,
173 .board_name
= &adq12b_boards
[0].name
,
174 .offset
= sizeof(struct adq12b_board
),
175 .num_names
= ARRAY_SIZE(adq12b_boards
),
178 static int adq12b_ai_rinsn(struct comedi_device
*dev
,
179 struct comedi_subdevice
*s
, struct comedi_insn
*insn
,
181 static int adq12b_di_insn_bits(struct comedi_device
*dev
,
182 struct comedi_subdevice
*s
,
183 struct comedi_insn
*insn
, unsigned int *data
);
184 static int adq12b_do_insn_bits(struct comedi_device
*dev
,
185 struct comedi_subdevice
*s
,
186 struct comedi_insn
*insn
, unsigned int *data
);
189 * Attach is called by the Comedi core to configure the driver
190 * for a particular board. If you specified a board_name array
191 * in the driver structure, dev->board_ptr contains that
194 static int adq12b_attach(struct comedi_device
*dev
, struct comedi_devconfig
*it
)
196 struct comedi_subdevice
*s
;
197 unsigned long iobase
;
198 int unipolar
, differential
;
200 iobase
= it
->options
[0];
201 unipolar
= it
->options
[1];
202 differential
= it
->options
[2];
204 printk(KERN_INFO
"comedi%d: adq12b called with options base=0x%03lx, "
205 "%s and %s\n", dev
->minor
, iobase
,
206 (unipolar
== 1) ? "unipolar" : "bipolar",
207 (differential
== 1) ? "differential" : "single-ended");
209 /* if no address was specified, try the default 0x300 */
211 printk(KERN_WARNING
"comedi%d: adq12b warning: I/O base "
212 "address not specified. Trying the default 0x300.\n",
217 printk("comedi%d: adq12b: 0x%04lx ", dev
->minor
, iobase
);
218 if (!request_region(iobase
, ADQ12B_SIZE
, "adq12b")) {
219 printk("I/O port conflict\n");
222 dev
->iobase
= iobase
;
225 * Initialize dev->board_name. Note that we can use the "thisboard"
226 * macro now, since we just initialized it in the last line.
228 dev
->board_name
= thisboard
->name
;
231 * Allocate the private structure area. alloc_private() is a
232 * convenient macro defined in comedidev.h.
234 if (alloc_private(dev
, sizeof(struct adq12b_private
)) < 0)
237 /* fill in devpriv structure */
238 devpriv
->unipolar
= unipolar
;
239 devpriv
->differential
= differential
;
240 devpriv
->digital_state
= 0;
241 /* initialize channel and range to -1 so we make sure we always write
242 at least once to the CTREG in the instruction */
243 devpriv
->last_channel
= -1;
244 devpriv
->last_range
= -1;
247 * Allocate the subdevice structures. alloc_subdevice() is a
248 * convenient macro defined in comedidev.h.
250 if (alloc_subdevices(dev
, 3) < 0)
253 s
= dev
->subdevices
+ 0;
254 /* analog input subdevice */
255 s
->type
= COMEDI_SUBD_AI
;
257 s
->subdev_flags
= SDF_READABLE
| SDF_GROUND
| SDF_DIFF
;
258 s
->n_chan
= thisboard
->ai_diff_chans
;
260 s
->subdev_flags
= SDF_READABLE
| SDF_GROUND
;
261 s
->n_chan
= thisboard
->ai_se_chans
;
265 s
->range_table
= &range_adq12b_ai_unipolar
;
267 s
->range_table
= &range_adq12b_ai_bipolar
;
269 s
->maxdata
= (1 << thisboard
->ai_bits
) - 1;
271 s
->len_chanlist
= 4; /* This is the maximum chanlist length that
272 the board can handle */
273 s
->insn_read
= adq12b_ai_rinsn
;
275 s
= dev
->subdevices
+ 1;
276 /* digital input subdevice */
277 s
->type
= COMEDI_SUBD_DI
;
278 s
->subdev_flags
= SDF_READABLE
;
279 s
->n_chan
= thisboard
->di_chans
;
281 s
->range_table
= &range_digital
;
282 s
->insn_bits
= adq12b_di_insn_bits
;
284 s
= dev
->subdevices
+ 2;
285 /* digital output subdevice */
286 s
->type
= COMEDI_SUBD_DO
;
287 s
->subdev_flags
= SDF_WRITABLE
;
288 s
->n_chan
= thisboard
->do_chans
;
290 s
->range_table
= &range_digital
;
291 s
->insn_bits
= adq12b_do_insn_bits
;
293 printk(KERN_INFO
"attached\n");
299 * _detach is called to deconfigure a device. It should deallocate
301 * This function is also called when _attach() fails, so it should be
302 * careful not to release resources that were not necessarily
303 * allocated by _attach(). dev->private and dev->subdevices are
304 * deallocated automatically by the core.
306 static int adq12b_detach(struct comedi_device
*dev
)
309 release_region(dev
->iobase
, ADQ12B_SIZE
);
313 printk(KERN_INFO
"comedi%d: adq12b: removed\n", dev
->minor
);
319 * "instructions" read/write data in "one-shot" or "software-triggered"
323 static int adq12b_ai_rinsn(struct comedi_device
*dev
,
324 struct comedi_subdevice
*s
, struct comedi_insn
*insn
,
329 unsigned char hi
, lo
, status
;
331 /* change channel and range only if it is different from the previous */
332 range
= CR_RANGE(insn
->chanspec
);
333 channel
= CR_CHAN(insn
->chanspec
);
334 if (channel
!= devpriv
->last_channel
|| range
!= devpriv
->last_range
) {
335 outb((range
<< 4) | channel
, dev
->iobase
+ ADQ12B_CTREG
);
336 udelay(50); /* wait for the mux to settle */
339 /* trigger conversion */
340 status
= inb(dev
->iobase
+ ADQ12B_ADLOW
);
342 /* convert n samples */
343 for (n
= 0; n
< insn
->n
; n
++) {
345 /* wait for end of conversion */
349 status
= inb(dev
->iobase
+ ADQ12B_STINR
);
350 status
= status
& ADQ12B_EOC
;
351 } while (status
== 0 && ++i
< TIMEOUT
);
352 /* } while (++i < 10); */
355 hi
= inb(dev
->iobase
+ ADQ12B_ADHIG
);
356 lo
= inb(dev
->iobase
+ ADQ12B_ADLOW
);
358 /* printk("debug: chan=%d range=%d status=%d hi=%d lo=%d\n",
359 channel, range, status, hi, lo); */
360 data
[n
] = (hi
<< 8) | lo
;
364 /* return the number of samples read/written */
368 static int adq12b_di_insn_bits(struct comedi_device
*dev
,
369 struct comedi_subdevice
*s
,
370 struct comedi_insn
*insn
, unsigned int *data
)
373 /* only bits 0-4 have information about digital inputs */
374 data
[1] = (inb(dev
->iobase
+ ADQ12B_STINR
) & (0x1f));
379 static int adq12b_do_insn_bits(struct comedi_device
*dev
,
380 struct comedi_subdevice
*s
,
381 struct comedi_insn
*insn
, unsigned int *data
)
385 for (channel
= 0; channel
< 8; channel
++)
386 if (((data
[0] >> channel
) & 0x01) != 0)
387 outb((((data
[1] >> channel
) & 0x01) << 3) | channel
,
388 dev
->iobase
+ ADQ12B_OUTBR
);
390 /* store information to retrieve when asked for reading */
392 devpriv
->digital_state
&= ~data
[0];
393 devpriv
->digital_state
|= (data
[0] & data
[1]);
396 data
[1] = devpriv
->digital_state
;
402 * A convenient macro that defines init_module() and cleanup_module(),
405 static int __init
driver_adq12b_init_module(void)
407 return comedi_driver_register(&driver_adq12b
);
410 static void __exit
driver_adq12b_cleanup_module(void)
412 comedi_driver_unregister(&driver_adq12b
);
415 module_init(driver_adq12b_init_module
);
416 module_exit(driver_adq12b_cleanup_module
);
418 MODULE_AUTHOR("Comedi http://www.comedi.org");
419 MODULE_DESCRIPTION("Comedi low-level driver");
420 MODULE_LICENSE("GPL");