1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
|
/*
comedi/drivers/cb_pcimdas.c
Comedi driver for Computer Boards PCIM-DAS1602/16
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 2000 David A. Schleef <ds@schleef.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
Driver: cb_pcimdas
Description: Measurement Computing PCI Migration series boards
Devices: [ComputerBoards] PCIM-DAS1602/16 (cb_pcimdas)
Author: Richard Bytheway
Updated: Wed, 13 Nov 2002 12:34:56 +0000
Status: experimental
Written to support the PCIM-DAS1602/16 on a 2.4 series kernel.
Configuration Options:
[0] - PCI bus number
[1] - PCI slot number
Developed from cb_pcidas and skel by Richard Bytheway (mocelet@sucs.org).
Only supports DIO, AO and simple AI in it's present form.
No interrupts, multi channel or FIFO AI, although the card looks like it could support this.
See http://www.mccdaq.com/PDFs/Manuals/pcim-das1602-16.pdf for more details.
*/
#include "../comedidev.h"
#include <linux/delay.h>
#include <linux/interrupt.h>
#include "plx9052.h"
#include "8255.h"
/* #define CBPCIMDAS_DEBUG */
#undef CBPCIMDAS_DEBUG
#define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307
/* Registers for the PCIM-DAS1602/16 */
/* sizes of io regions (bytes) */
#define BADR0_SIZE 2 /* ?? */
#define BADR1_SIZE 4
#define BADR2_SIZE 6
#define BADR3_SIZE 16
#define BADR4_SIZE 4
/* DAC Offsets */
#define ADC_TRIG 0
#define DAC0_OFFSET 2
#define DAC1_OFFSET 4
/* AI and Counter Constants */
#define MUX_LIMITS 0
#define MAIN_CONN_DIO 1
#define ADC_STAT 2
#define ADC_CONV_STAT 3
#define ADC_INT 4
#define ADC_PACER 5
#define BURST_MODE 6
#define PROG_GAIN 7
#define CLK8254_1_DATA 8
#define CLK8254_2_DATA 9
#define CLK8254_3_DATA 10
#define CLK8254_CONTROL 11
#define USER_COUNTER 12
#define RESID_COUNT_H 13
#define RESID_COUNT_L 14
/* Board description */
struct cb_pcimdas_board {
const char *name;
unsigned short device_id;
int ai_se_chans; /* Inputs in single-ended mode */
int ai_diff_chans; /* Inputs in differential mode */
int ai_bits; /* analog input resolution */
int ai_speed; /* fastest conversion period in ns */
int ao_nchan; /* number of analog out channels */
int ao_bits; /* analogue output resolution */
int has_ao_fifo; /* analog output has fifo */
int ao_scan_speed; /* analog output speed for 1602 series (for a scan, not conversion) */
int fifo_size; /* number of samples fifo can hold */
int dio_bits; /* number of dio bits */
int has_dio; /* has DIO */
const struct comedi_lrange *ranges;
};
static const struct cb_pcimdas_board cb_pcimdas_boards[] = {
{
.name = "PCIM-DAS1602/16",
.device_id = 0x56,
.ai_se_chans = 16,
.ai_diff_chans = 8,
.ai_bits = 16,
.ai_speed = 10000, /* ?? */
.ao_nchan = 2,
.ao_bits = 12,
.has_ao_fifo = 0, /* ?? */
.ao_scan_speed = 10000,
/* ?? */
.fifo_size = 1024,
.dio_bits = 24,
.has_dio = 1,
/* .ranges = &cb_pcimdas_ranges, */
},
};
/*
* Useful for shorthand access to the particular board structure
*/
#define thisboard ((const struct cb_pcimdas_board *)dev->board_ptr)
/*
* this structure is for data unique to this hardware driver. If
* several hardware drivers keep similar information in this structure,
* feel free to suggest moving the variable to the struct comedi_device
* struct.
*/
struct cb_pcimdas_private {
/* would be useful for a PCI device */
struct pci_dev *pci_dev;
/* base addresses */
unsigned long BADR0;
unsigned long BADR1;
unsigned long BADR2;
unsigned long BADR3;
unsigned long BADR4;
/* Used for AO readback */
unsigned int ao_readback[2];
};
/*
* most drivers define the following macro to make it easy to
* access the private structure.
*/
#define devpriv ((struct cb_pcimdas_private *)dev->private)
static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int cb_pcimdas_ao_winsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int cb_pcimdas_ao_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static struct pci_dev *cb_pcimdas_find_pci_dev(struct comedi_device *dev,
struct comedi_devconfig *it)
{
struct pci_dev *pcidev = NULL;
int bus = it->options[0];
int slot = it->options[1];
int i;
for_each_pci_dev(pcidev) {
if (bus || slot) {
if (bus != pcidev->bus->number ||
slot != PCI_SLOT(pcidev->devfn))
continue;
}
if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS)
continue;
for (i = 0; i < ARRAY_SIZE(cb_pcimdas_boards); i++) {
if (cb_pcimdas_boards[i].device_id != pcidev->device)
continue;
dev->board_ptr = cb_pcimdas_boards + i;
return pcidev;
}
}
dev_err(dev->class_dev,
"No supported board found! (req. bus %d, slot %d)\n",
bus, slot);
return NULL;
}
/*
* Attach is called by the Comedi core to configure the driver
* for a particular board. If you specified a board_name array
* in the driver structure, dev->board_ptr contains that
* address.
*/
static int cb_pcimdas_attach(struct comedi_device *dev,
struct comedi_devconfig *it)
{
struct pci_dev *pcidev;
struct comedi_subdevice *s;
int ret;
/*
* Allocate the private structure area.
*/
if (alloc_private(dev, sizeof(struct cb_pcimdas_private)) < 0)
return -ENOMEM;
pcidev = cb_pcimdas_find_pci_dev(dev, it);
if (!pcidev)
return -EIO;
devpriv->pci_dev = pcidev;
/* Warn about non-tested features */
switch (thisboard->device_id) {
case 0x56:
break;
default:
dev_dbg(dev->class_dev, "THIS CARD IS UNSUPPORTED.\n");
dev_dbg(dev->class_dev,
"PLEASE REPORT USAGE TO <mocelet@sucs.org>\n");
}
if (comedi_pci_enable(pcidev, "cb_pcimdas")) {
dev_err(dev->class_dev,
"Failed to enable PCI device and request regions\n");
return -EIO;
}
devpriv->BADR0 = pci_resource_start(devpriv->pci_dev, 0);
devpriv->BADR1 = pci_resource_start(devpriv->pci_dev, 1);
devpriv->BADR2 = pci_resource_start(devpriv->pci_dev, 2);
devpriv->BADR3 = pci_resource_start(devpriv->pci_dev, 3);
devpriv->BADR4 = pci_resource_start(devpriv->pci_dev, 4);
/* Dont support IRQ yet */
/* get irq */
/* if(request_irq(devpriv->pci_dev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev )) */
/* { */
/* printk(" unable to allocate irq %u\n", devpriv->pci_dev->irq); */
/* return -EINVAL; */
/* } */
/* dev->irq = devpriv->pci_dev->irq; */
/* Initialize dev->board_name */
dev->board_name = thisboard->name;
ret = comedi_alloc_subdevices(dev, 3);
if (ret)
return ret;
s = dev->subdevices + 0;
/* dev->read_subdev=s; */
/* analog input subdevice */
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND;
s->n_chan = thisboard->ai_se_chans;
s->maxdata = (1 << thisboard->ai_bits) - 1;
s->range_table = &range_unknown;
s->len_chanlist = 1; /* This is the maximum chanlist length that */
/* the board can handle */
s->insn_read = cb_pcimdas_ai_rinsn;
s = dev->subdevices + 1;
/* analog output subdevice */
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = thisboard->ao_nchan;
s->maxdata = 1 << thisboard->ao_bits;
/* ranges are hardware settable, but not software readable. */
s->range_table = &range_unknown;
s->insn_write = &cb_pcimdas_ao_winsn;
s->insn_read = &cb_pcimdas_ao_rinsn;
s = dev->subdevices + 2;
/* digital i/o subdevice */
if (thisboard->has_dio)
subdev_8255_init(dev, s, NULL, devpriv->BADR4);
else
s->type = COMEDI_SUBD_UNUSED;
return 1;
}
static void cb_pcimdas_detach(struct comedi_device *dev)
{
if (dev->irq)
free_irq(dev->irq, dev);
if (devpriv) {
if (devpriv->pci_dev) {
if (devpriv->BADR0)
comedi_pci_disable(devpriv->pci_dev);
pci_dev_put(devpriv->pci_dev);
}
}
}
/*
* "instructions" read/write data in "one-shot" or "software-triggered"
* mode.
*/
static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int n, i;
unsigned int d;
unsigned int busy;
int chan = CR_CHAN(insn->chanspec);
unsigned short chanlims;
int maxchans;
/* only support sw initiated reads from a single channel */
/* check channel number */
if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) /* differential mode */
maxchans = thisboard->ai_diff_chans;
else
maxchans = thisboard->ai_se_chans;
if (chan > (maxchans - 1))
return -ETIMEDOUT; /* *** Wrong error code. Fixme. */
/* configure for sw initiated read */
d = inb(devpriv->BADR3 + 5);
if ((d & 0x03) > 0) { /* only reset if needed. */
d = d & 0xfd;
outb(d, devpriv->BADR3 + 5);
}
outb(0x01, devpriv->BADR3 + 6); /* set bursting off, conversions on */
outb(0x00, devpriv->BADR3 + 7); /* set range to 10V. UP/BP is controlled by a switch on the board */
/*
* write channel limits to multiplexer, set Low (bits 0-3) and
* High (bits 4-7) channels to chan.
*/
chanlims = chan | (chan << 4);
outb(chanlims, devpriv->BADR3 + 0);
/* convert n samples */
for (n = 0; n < insn->n; n++) {
/* trigger conversion */
outw(0, devpriv->BADR2 + 0);
#define TIMEOUT 1000 /* typically takes 5 loops on a lightly loaded Pentium 100MHz, */
/* this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit. */
/* wait for conversion to end */
for (i = 0; i < TIMEOUT; i++) {
busy = inb(devpriv->BADR3 + 2) & 0x80;
if (!busy)
break;
}
if (i == TIMEOUT) {
printk("timeout\n");
return -ETIMEDOUT;
}
/* read data */
d = inw(devpriv->BADR2 + 0);
/* mangle the data as necessary */
/* d ^= 1<<(thisboard->ai_bits-1); // 16 bit data from ADC, so no mangle needed. */
data[n] = d;
}
/* return the number of samples read/written */
return n;
}
static int cb_pcimdas_ao_winsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int i;
int chan = CR_CHAN(insn->chanspec);
/* Writing a list of values to an AO channel is probably not
* very useful, but that's how the interface is defined. */
for (i = 0; i < insn->n; i++) {
switch (chan) {
case 0:
outw(data[i] & 0x0FFF, devpriv->BADR2 + DAC0_OFFSET);
break;
case 1:
outw(data[i] & 0x0FFF, devpriv->BADR2 + DAC1_OFFSET);
break;
default:
return -1;
}
devpriv->ao_readback[chan] = data[i];
}
/* return the number of samples read/written */
return i;
}
/* AO subdevices should have a read insn as well as a write insn.
* Usually this means copying a value stored in devpriv. */
static int cb_pcimdas_ao_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int i;
int chan = CR_CHAN(insn->chanspec);
for (i = 0; i < insn->n; i++)
data[i] = devpriv->ao_readback[chan];
return i;
}
static struct comedi_driver cb_pcimdas_driver = {
.driver_name = "cb_pcimdas",
.module = THIS_MODULE,
.attach = cb_pcimdas_attach,
.detach = cb_pcimdas_detach,
};
static int __devinit cb_pcimdas_pci_probe(struct pci_dev *dev,
const struct pci_device_id *ent)
{
return comedi_pci_auto_config(dev, &cb_pcimdas_driver);
}
static void __devexit cb_pcimdas_pci_remove(struct pci_dev *dev)
{
comedi_pci_auto_unconfig(dev);
}
static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table) = {
{ PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0056) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table);
static struct pci_driver cb_pcimdas_pci_driver = {
.name = "cb_pcimdas",
.id_table = cb_pcimdas_pci_table,
.probe = cb_pcimdas_pci_probe,
.remove = __devexit_p(cb_pcimdas_pci_remove),
};
module_comedi_pci_driver(cb_pcimdas_driver, cb_pcimdas_pci_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
|