Commit | Line | Data |
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27b3f921 JT |
1 | /* |
2 | comedi/drivers/adq12b.c | |
3 | driver for MicroAxial ADQ12-B data acquisition and control card | |
4 | ||
5 | COMEDI - Linux Control and Measurement Device Interface | |
6 | Copyright (C) 2000 David A. Schleef <ds@schleef.org> | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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. | |
21 | ||
22 | */ | |
23 | /* | |
24 | Driver: adq12b | |
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 | |
29 | Status: works | |
30 | ||
31 | Driver for the acquisition card ADQ12-B (without any add-on). | |
32 | ||
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 | |
37 | ||
38 | If you do not specify any options, they will default to | |
39 | ||
40 | # comedi_config /dev/comedi0 adq12b 0x300,0,0 | |
41 | ||
42 | option 1: I/O base address. The following table is provided as a help | |
43 | of the hardware jumpers. | |
44 | ||
45 | address jumper JADR | |
46 | 0x300 1 (factory default) | |
47 | 0x320 2 | |
48 | 0x340 3 | |
49 | 0x360 4 | |
50 | 0x380 5 | |
51 | 0x3A0 6 | |
52 | ||
53 | option 2: unipolar/bipolar ADC selection: 0 -> bipolar, 1 -> unipolar | |
54 | ||
55 | selection comedi_config option JUB | |
56 | bipolar 0 2-3 (factory default) | |
57 | unipolar 1 1-2 | |
58 | ||
59 | option 3: single-ended/differential AI selection: 0 -> SE, 1 -> differential | |
60 | ||
61 | selection comedi_config option JCHA JCHB | |
62 | single-ended 0 1-2 1-2 (factory default) | |
63 | differential 1 2-3 2-3 | |
64 | ||
27b3f921 JT |
65 | written by jeremy theler <thelerg@ib.cnea.gov.ar> |
66 | ||
67 | instituto balseiro | |
68 | comision nacional de energia atomica | |
69 | universidad nacional de cuyo | |
70 | argentina | |
71 | ||
72 | 21-feb-2008 | |
73 | + changed supported devices string (missused the [] and ()) | |
74 | ||
75 | 13-oct-2007 | |
76 | + first try | |
77 | ||
78 | ||
79 | */ | |
80 | ||
81 | #include "../comedidev.h" | |
82 | ||
56e9e166 | 83 | /* address scheme (page 2.17 of the manual) */ |
27b3f921 JT |
84 | #define ADQ12B_SIZE 16 |
85 | ||
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 | |
95 | ||
56e9e166 | 96 | /* mask of the bit at STINR to check end of conversion */ |
27b3f921 JT |
97 | #define ADQ12B_EOC 0x20 |
98 | ||
99 | #define TIMEOUT 20 | |
100 | ||
56e9e166 | 101 | /* available ranges through the PGA gains */ |
9ced1de6 | 102 | static const struct comedi_lrange range_adq12b_ai_bipolar = { 4, { |
0a85b6f0 MT |
103 | BIP_RANGE(5), |
104 | BIP_RANGE(2), | |
105 | BIP_RANGE(1), | |
106 | BIP_RANGE(0.5) | |
107 | } | |
108 | }; | |
27b3f921 | 109 | |
9ced1de6 | 110 | static const struct comedi_lrange range_adq12b_ai_unipolar = { 4, { |
0a85b6f0 MT |
111 | UNI_RANGE(5), |
112 | UNI_RANGE(2), | |
113 | UNI_RANGE(1), | |
114 | UNI_RANGE | |
115 | (0.5) | |
116 | } | |
117 | }; | |
27b3f921 | 118 | |
47c6e958 | 119 | struct adq12b_board { |
0a85b6f0 MT |
120 | const char *name; |
121 | int ai_se_chans; | |
122 | int ai_diff_chans; | |
123 | int ai_bits; | |
124 | int di_chans; | |
125 | int do_chans; | |
47c6e958 | 126 | }; |
27b3f921 | 127 | |
47c6e958 | 128 | static const struct adq12b_board adq12b_boards[] = { |
0a85b6f0 MT |
129 | { |
130 | .name = "adq12b", | |
131 | .ai_se_chans = 16, | |
132 | .ai_diff_chans = 8, | |
133 | .ai_bits = 12, | |
134 | .di_chans = 5, | |
135 | .do_chans = 8} | |
56e9e166 | 136 | /* potentially, more adq-based deviced will be added */ |
27b3f921 | 137 | /*, |
68c3dbff BP |
138 | .name = "adq12b", |
139 | .ai_chans = 16, // this is just for reference, hardcoded again later | |
140 | .ai_bits = 12, | |
141 | .di_chans = 8, | |
142 | .do_chans = 5 | |
27b3f921 JT |
143 | }*/ |
144 | }; | |
145 | ||
47c6e958 | 146 | #define thisboard ((const struct adq12b_board *)dev->board_ptr) |
27b3f921 | 147 | |
1ade3157 | 148 | struct adq12b_private { |
0a85b6f0 MT |
149 | int unipolar; /* option 2 of comedi_config (1 is iobase) */ |
150 | int differential; /* option 3 of comedi_config */ | |
151 | int last_channel; | |
152 | int last_range; | |
153 | unsigned int digital_state; | |
1ade3157 | 154 | }; |
27b3f921 | 155 | |
1ade3157 | 156 | #define devpriv ((struct adq12b_private *)dev->private) |
27b3f921 JT |
157 | |
158 | /* | |
139dfbdf | 159 | * The struct comedi_driver structure tells the Comedi core module |
27b3f921 JT |
160 | * which functions to call to configure/deconfigure (attach/detach) |
161 | * the board, and also about the kernel module that contains | |
162 | * the device code. | |
163 | */ | |
0a85b6f0 MT |
164 | static int adq12b_attach(struct comedi_device *dev, |
165 | struct comedi_devconfig *it); | |
71b5f4f1 | 166 | static int adq12b_detach(struct comedi_device *dev); |
0a85b6f0 MT |
167 | static struct comedi_driver driver_adq12b = { |
168 | driver_name:"adq12b", | |
169 | module:THIS_MODULE, | |
170 | attach:adq12b_attach, | |
171 | detach:adq12b_detach, | |
172 | board_name:&adq12b_boards[0].name, | |
173 | offset:sizeof(struct adq12b_board), | |
174 | num_names:ARRAY_SIZE(adq12b_boards), | |
27b3f921 JT |
175 | }; |
176 | ||
0a85b6f0 MT |
177 | static int adq12b_ai_rinsn(struct comedi_device *dev, |
178 | struct comedi_subdevice *s, struct comedi_insn *insn, | |
179 | unsigned int *data); | |
180 | static int adq12b_di_insn_bits(struct comedi_device *dev, | |
181 | struct comedi_subdevice *s, | |
182 | struct comedi_insn *insn, unsigned int *data); | |
183 | static int adq12b_do_insn_bits(struct comedi_device *dev, | |
184 | struct comedi_subdevice *s, | |
185 | struct comedi_insn *insn, unsigned int *data); | |
27b3f921 JT |
186 | |
187 | /* | |
188 | * Attach is called by the Comedi core to configure the driver | |
189 | * for a particular board. If you specified a board_name array | |
190 | * in the driver structure, dev->board_ptr contains that | |
191 | * address. | |
192 | */ | |
f7cbd7aa | 193 | static int adq12b_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
27b3f921 | 194 | { |
0a85b6f0 MT |
195 | struct comedi_subdevice *s; |
196 | unsigned long iobase; | |
197 | int unipolar, differential; | |
198 | ||
199 | iobase = it->options[0]; | |
200 | unipolar = it->options[1]; | |
201 | differential = it->options[2]; | |
202 | ||
203 | printk("comedi%d: adq12b called with options base=0x%03lx, %s and %s\n", | |
204 | dev->minor, iobase, (unipolar == 1) ? "unipolar" : "bipolar", | |
205 | (differential == 1) ? "differential" : "single-ended"); | |
206 | ||
207 | /* if no address was specified, try the default 0x300 */ | |
208 | if (iobase == 0) { | |
209 | printk | |
210 | ("comedi%d: adq12b warning: I/O base address not specified. Trying the default 0x300.\n", | |
211 | dev->minor); | |
212 | iobase = 0x300; | |
213 | } | |
214 | ||
215 | printk("comedi%d: adq12b: 0x%04lx ", dev->minor, iobase); | |
216 | if (!request_region(iobase, ADQ12B_SIZE, "adq12b")) { | |
217 | printk("I/O port conflict\n"); | |
218 | return -EIO; | |
219 | } | |
220 | dev->iobase = iobase; | |
27b3f921 JT |
221 | |
222 | /* | |
223 | * Initialize dev->board_name. Note that we can use the "thisboard" | |
224 | * macro now, since we just initialized it in the last line. | |
225 | */ | |
0a85b6f0 | 226 | dev->board_name = thisboard->name; |
27b3f921 JT |
227 | |
228 | /* | |
229 | * Allocate the private structure area. alloc_private() is a | |
230 | * convenient macro defined in comedidev.h. | |
231 | */ | |
0a85b6f0 MT |
232 | if (alloc_private(dev, sizeof(struct adq12b_private)) < 0) |
233 | return -ENOMEM; | |
27b3f921 JT |
234 | |
235 | /* fill in devpriv structure */ | |
0a85b6f0 MT |
236 | devpriv->unipolar = unipolar; |
237 | devpriv->differential = differential; | |
27b3f921 JT |
238 | devpriv->digital_state = 0; |
239 | /* initialize channel and range to -1 so we make sure we always write | |
240 | at least once to the CTREG in the instruction */ | |
0a85b6f0 MT |
241 | devpriv->last_channel = -1; |
242 | devpriv->last_range = -1; | |
27b3f921 JT |
243 | |
244 | /* | |
245 | * Allocate the subdevice structures. alloc_subdevice() is a | |
246 | * convenient macro defined in comedidev.h. | |
247 | */ | |
0a85b6f0 MT |
248 | if (alloc_subdevices(dev, 3) < 0) |
249 | return -ENOMEM; | |
250 | ||
251 | s = dev->subdevices + 0; | |
252 | /* analog input subdevice */ | |
253 | s->type = COMEDI_SUBD_AI; | |
254 | if (differential) { | |
255 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; | |
256 | s->n_chan = thisboard->ai_diff_chans; | |
257 | } else { | |
258 | s->subdev_flags = SDF_READABLE | SDF_GROUND; | |
259 | s->n_chan = thisboard->ai_se_chans; | |
260 | } | |
261 | ||
262 | if (unipolar) { | |
263 | s->range_table = &range_adq12b_ai_unipolar; | |
264 | } else { | |
265 | s->range_table = &range_adq12b_ai_bipolar; | |
266 | } | |
267 | ||
268 | s->maxdata = (1 << thisboard->ai_bits) - 1; | |
269 | ||
270 | s->len_chanlist = 4; /* This is the maximum chanlist length that | |
271 | the board can handle */ | |
272 | s->insn_read = adq12b_ai_rinsn; | |
273 | ||
274 | s = dev->subdevices + 1; | |
275 | /* digital input subdevice */ | |
276 | s->type = COMEDI_SUBD_DI; | |
277 | s->subdev_flags = SDF_READABLE; | |
278 | s->n_chan = thisboard->di_chans; | |
279 | s->maxdata = 1; | |
280 | s->range_table = &range_digital; | |
281 | s->insn_bits = adq12b_di_insn_bits; | |
282 | ||
283 | s = dev->subdevices + 2; | |
284 | /* digital output subdevice */ | |
285 | s->type = COMEDI_SUBD_DO; | |
286 | s->subdev_flags = SDF_WRITABLE; | |
287 | s->n_chan = thisboard->do_chans; | |
288 | s->maxdata = 1; | |
289 | s->range_table = &range_digital; | |
290 | s->insn_bits = adq12b_do_insn_bits; | |
291 | ||
292 | printk("attached\n"); | |
293 | ||
294 | return 0; | |
27b3f921 JT |
295 | } |
296 | ||
27b3f921 JT |
297 | /* |
298 | * _detach is called to deconfigure a device. It should deallocate | |
299 | * resources. | |
300 | * This function is also called when _attach() fails, so it should be | |
301 | * careful not to release resources that were not necessarily | |
302 | * allocated by _attach(). dev->private and dev->subdevices are | |
303 | * deallocated automatically by the core. | |
304 | */ | |
71b5f4f1 | 305 | static int adq12b_detach(struct comedi_device *dev) |
27b3f921 | 306 | { |
0a85b6f0 MT |
307 | if (dev->iobase) |
308 | release_region(dev->iobase, ADQ12B_SIZE); | |
27b3f921 | 309 | |
0a85b6f0 | 310 | kfree(devpriv); |
27b3f921 | 311 | |
0a85b6f0 | 312 | printk("comedi%d: adq12b: removed\n", dev->minor); |
27b3f921 | 313 | |
0a85b6f0 | 314 | return 0; |
27b3f921 JT |
315 | } |
316 | ||
317 | /* | |
318 | * "instructions" read/write data in "one-shot" or "software-triggered" | |
319 | * mode. | |
320 | */ | |
321 | ||
0a85b6f0 MT |
322 | static int adq12b_ai_rinsn(struct comedi_device *dev, |
323 | struct comedi_subdevice *s, struct comedi_insn *insn, | |
324 | unsigned int *data) | |
27b3f921 | 325 | { |
0a85b6f0 MT |
326 | int n, i; |
327 | int range, channel; | |
328 | unsigned char hi, lo, status; | |
329 | ||
330 | /* change channel and range only if it is different from the previous */ | |
331 | range = CR_RANGE(insn->chanspec); | |
332 | channel = CR_CHAN(insn->chanspec); | |
333 | if (channel != devpriv->last_channel || range != devpriv->last_range) { | |
334 | outb((range << 4) | channel, dev->iobase + ADQ12B_CTREG); | |
335 | udelay(50); /* wait for the mux to settle */ | |
336 | } | |
337 | ||
338 | /* trigger conversion */ | |
339 | status = inb(dev->iobase + ADQ12B_ADLOW); | |
340 | ||
341 | /* convert n samples */ | |
342 | for (n = 0; n < insn->n; n++) { | |
343 | ||
344 | /* wait for end of convertion */ | |
345 | i = 0; | |
346 | do { | |
5f74ea14 | 347 | /* udelay(1); */ |
0a85b6f0 MT |
348 | status = inb(dev->iobase + ADQ12B_STINR); |
349 | status = status & ADQ12B_EOC; | |
350 | } while (status == 0 && ++i < TIMEOUT); | |
56e9e166 | 351 | /* } while (++i < 10); */ |
27b3f921 | 352 | |
0a85b6f0 MT |
353 | /* read data */ |
354 | hi = inb(dev->iobase + ADQ12B_ADHIG); | |
355 | lo = inb(dev->iobase + ADQ12B_ADLOW); | |
27b3f921 | 356 | |
0a85b6f0 MT |
357 | /* printk("debug: chan=%d range=%d status=%d hi=%d lo=%d\n", channel, range, status, hi, lo); */ |
358 | data[n] = (hi << 8) | lo; | |
27b3f921 | 359 | |
0a85b6f0 | 360 | } |
27b3f921 | 361 | |
0a85b6f0 MT |
362 | /* return the number of samples read/written */ |
363 | return n; | |
27b3f921 JT |
364 | } |
365 | ||
0a85b6f0 MT |
366 | static int adq12b_di_insn_bits(struct comedi_device *dev, |
367 | struct comedi_subdevice *s, | |
368 | struct comedi_insn *insn, unsigned int *data) | |
27b3f921 JT |
369 | { |
370 | ||
0a85b6f0 MT |
371 | /* only bits 0-4 have information about digital inputs */ |
372 | data[1] = (inb(dev->iobase + ADQ12B_STINR) & (0x1f)); | |
27b3f921 | 373 | |
0a85b6f0 | 374 | return 2; |
27b3f921 JT |
375 | } |
376 | ||
0a85b6f0 MT |
377 | static int adq12b_do_insn_bits(struct comedi_device *dev, |
378 | struct comedi_subdevice *s, | |
379 | struct comedi_insn *insn, unsigned int *data) | |
27b3f921 | 380 | { |
0a85b6f0 | 381 | int channel; |
27b3f921 JT |
382 | |
383 | for (channel = 0; channel < 8; channel++) | |
0a85b6f0 MT |
384 | if (((data[0] >> channel) & 0x01) != 0) |
385 | outb((((data[1] >> channel) & 0x01) << 3) | channel, | |
386 | dev->iobase + ADQ12B_OUTBR); | |
27b3f921 | 387 | |
0a85b6f0 MT |
388 | /* store information to retrieve when asked for reading */ |
389 | if (data[0]) { | |
390 | devpriv->digital_state &= ~data[0]; | |
391 | devpriv->digital_state |= (data[0] & data[1]); | |
392 | } | |
27b3f921 | 393 | |
0a85b6f0 | 394 | data[1] = devpriv->digital_state; |
27b3f921 | 395 | |
0a85b6f0 | 396 | return 2; |
27b3f921 JT |
397 | } |
398 | ||
27b3f921 JT |
399 | /* |
400 | * A convenient macro that defines init_module() and cleanup_module(), | |
401 | * as necessary. | |
402 | */ | |
403 | COMEDI_INITCLEANUP(driver_adq12b); |