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
|
/*
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.
*/
/*
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 <linux/module.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include "../comedidev.h"
#include "plx9052.h"
#include "8255.h"
/* Registers for the PCIM-DAS1602/16 */
/* 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
/*
* 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 {
/* base addresses */
unsigned long daqio;
unsigned long BADR3;
/* Used for AO readback */
unsigned int ao_readback[2];
};
static int cb_pcimdas_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
struct cb_pcimdas_private *devpriv = dev->private;
unsigned int status;
status = inb(devpriv->BADR3 + 2);
if ((status & 0x80) == 0)
return 0;
return -EBUSY;
}
static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
struct cb_pcimdas_private *devpriv = dev->private;
int n;
unsigned int d;
int chan = CR_CHAN(insn->chanspec);
unsigned short chanlims;
int maxchans;
int ret;
/* only support sw initiated reads from a single channel */
/* check channel number */
if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) /* differential mode */
maxchans = s->n_chan / 2;
else
maxchans = s->n_chan;
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);
}
/* set bursting off, conversions on */
outb(0x01, devpriv->BADR3 + 6);
/* set range to 10V. UP/BP is controlled by a switch on the board */
outb(0x00, devpriv->BADR3 + 7);
/*
* 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->daqio + 0);
/* wait for conversion to end */
ret = comedi_timeout(dev, s, insn, cb_pcimdas_ai_eoc, 0);
if (ret)
return ret;
/* read data */
data[n] = inw(devpriv->daqio + 0);
}
/* 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)
{
struct cb_pcimdas_private *devpriv = dev->private;
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->daqio + DAC0_OFFSET);
break;
case 1:
outw(data[i] & 0x0FFF, devpriv->daqio + 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)
{
struct cb_pcimdas_private *devpriv = dev->private;
int i;
int chan = CR_CHAN(insn->chanspec);
for (i = 0; i < insn->n; i++)
data[i] = devpriv->ao_readback[chan];
return i;
}
static int cb_pcimdas_auto_attach(struct comedi_device *dev,
unsigned long context_unused)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
struct cb_pcimdas_private *devpriv;
struct comedi_subdevice *s;
int ret;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
ret = comedi_pci_enable(dev);
if (ret)
return ret;
devpriv->daqio = pci_resource_start(pcidev, 2);
devpriv->BADR3 = pci_resource_start(pcidev, 3);
dev->iobase = pci_resource_start(pcidev, 4);
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 = 16;
s->maxdata = 0xffff;
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 = 2;
s->maxdata = 0xfff;
/* 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 */
ret = subdev_8255_init(dev, s, NULL, 0x00);
if (ret)
return ret;
return 0;
}
static void cb_pcimdas_detach(struct comedi_device *dev)
{
if (dev->irq)
free_irq(dev->irq, dev);
comedi_pci_disable(dev);
}
static struct comedi_driver cb_pcimdas_driver = {
.driver_name = "cb_pcimdas",
.module = THIS_MODULE,
.auto_attach = cb_pcimdas_auto_attach,
.detach = cb_pcimdas_detach,
};
static int cb_pcimdas_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
return comedi_pci_auto_config(dev, &cb_pcimdas_driver,
id->driver_data);
}
static const struct pci_device_id cb_pcimdas_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_CB, 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 = comedi_pci_auto_unconfig,
};
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");
|