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
|
/*
comedi/drivers/dt2815.c
Hardware driver for Data Translation DT2815
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>
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: dt2815
Description: Data Translation DT2815
Author: ds
Status: mostly complete, untested
Devices: [Data Translation] DT2815 (dt2815)
I'm not sure anyone has ever tested this board. If you have information
contrary, please update.
Configuration options:
[0] - I/O port base base address
[1] - IRQ (unused)
[2] - Voltage unipolar/bipolar configuration
0 == unipolar 5V (0V -- +5V)
1 == bipolar 5V (-5V -- +5V)
[3] - Current offset configuration
0 == disabled (0mA -- +32mAV)
1 == enabled (+4mA -- +20mAV)
[4] - Firmware program configuration
0 == program 1 (see manual table 5-4)
1 == program 2 (see manual table 5-4)
2 == program 3 (see manual table 5-4)
3 == program 4 (see manual table 5-4)
[5] - Analog output 0 range configuration
0 == voltage
1 == current
[6] - Analog output 1 range configuration (same options)
[7] - Analog output 2 range configuration (same options)
[8] - Analog output 3 range configuration (same options)
[9] - Analog output 4 range configuration (same options)
[10] - Analog output 5 range configuration (same options)
[11] - Analog output 6 range configuration (same options)
[12] - Analog output 7 range configuration (same options)
*/
#include "../comedidev.h"
#include <linux/ioport.h>
#include <linux/delay.h>
static const struct comedi_lrange
range_dt2815_ao_32_current = {1, {RANGE_mA(0, 32)} };
static const struct comedi_lrange
range_dt2815_ao_20_current = {1, {RANGE_mA(4, 20)} };
#define DT2815_SIZE 2
#define DT2815_DATA 0
#define DT2815_STATUS 1
struct dt2815_private {
const struct comedi_lrange *range_type_list[8];
unsigned int ao_readback[8];
};
#define devpriv ((struct dt2815_private *)dev->private)
static int dt2815_wait_for_status(struct comedi_device *dev, int status)
{
int i;
for (i = 0; i < 100; i++) {
if (inb(dev->iobase + DT2815_STATUS) == status)
break;
}
return status;
}
static int dt2815_ao_insn_read(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 int dt2815_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int i;
int chan = CR_CHAN(insn->chanspec);
unsigned int status;
unsigned int lo, hi;
for (i = 0; i < insn->n; i++) {
lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01;
hi = (data[i] & 0xff0) >> 4;
status = dt2815_wait_for_status(dev, 0x00);
if (status != 0) {
printk(KERN_WARNING "dt2815: failed to write low byte "
"on %d reason %x\n", chan, status);
return -EBUSY;
}
outb(lo, dev->iobase + DT2815_DATA);
status = dt2815_wait_for_status(dev, 0x10);
if (status != 0x10) {
printk(KERN_WARNING "dt2815: failed to write high byte "
"on %d reason %x\n", chan, status);
return -EBUSY;
}
devpriv->ao_readback[chan] = data[i];
}
return i;
}
/*
options[0] Board base address
options[1] IRQ (not applicable)
options[2] Voltage unipolar/bipolar configuration
0 == unipolar 5V (0V -- +5V)
1 == bipolar 5V (-5V -- +5V)
options[3] Current offset configuration
0 == disabled (0mA -- +32mAV)
1 == enabled (+4mA -- +20mAV)
options[4] Firmware program configuration
0 == program 1 (see manual table 5-4)
1 == program 2 (see manual table 5-4)
2 == program 3 (see manual table 5-4)
3 == program 4 (see manual table 5-4)
options[5] Analog output 0 range configuration
0 == voltage
1 == current
options[6] Analog output 1 range configuration
...
options[12] Analog output 7 range configuration
0 == voltage
1 == current
*/
static int dt2815_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
struct comedi_subdevice *s;
int i;
const struct comedi_lrange *current_range_type, *voltage_range_type;
unsigned long iobase;
iobase = it->options[0];
printk(KERN_INFO "comedi%d: dt2815: 0x%04lx ", dev->minor, iobase);
if (!request_region(iobase, DT2815_SIZE, "dt2815")) {
printk(KERN_WARNING "I/O port conflict\n");
return -EIO;
}
dev->iobase = iobase;
dev->board_name = "dt2815";
if (alloc_subdevices(dev, 1) < 0)
return -ENOMEM;
if (alloc_private(dev, sizeof(struct dt2815_private)) < 0)
return -ENOMEM;
s = dev->subdevices;
/* ao subdevice */
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->maxdata = 0xfff;
s->n_chan = 8;
s->insn_write = dt2815_ao_insn;
s->insn_read = dt2815_ao_insn_read;
s->range_table_list = devpriv->range_type_list;
current_range_type = (it->options[3])
? &range_dt2815_ao_20_current : &range_dt2815_ao_32_current;
voltage_range_type = (it->options[2])
? &range_bipolar5 : &range_unipolar5;
for (i = 0; i < 8; i++) {
devpriv->range_type_list[i] = (it->options[5 + i])
? current_range_type : voltage_range_type;
}
/* Init the 2815 */
outb(0x00, dev->iobase + DT2815_STATUS);
for (i = 0; i < 100; i++) {
/* This is incredibly slow (approx 20 ms) */
unsigned int status;
udelay(1000);
status = inb(dev->iobase + DT2815_STATUS);
if (status == 4) {
unsigned int program;
program = (it->options[4] & 0x3) << 3 | 0x7;
outb(program, dev->iobase + DT2815_DATA);
printk(KERN_INFO ", program: 0x%x (@t=%d)\n",
program, i);
break;
} else if (status != 0x00) {
printk(KERN_WARNING "dt2815: unexpected status 0x%x "
"(@t=%d)\n", status, i);
if (status & 0x60)
outb(0x00, dev->iobase + DT2815_STATUS);
}
}
return 0;
}
static void dt2815_detach(struct comedi_device *dev)
{
if (dev->iobase)
release_region(dev->iobase, DT2815_SIZE);
}
static struct comedi_driver dt2815_driver = {
.driver_name = "dt2815",
.module = THIS_MODULE,
.attach = dt2815_attach,
.detach = dt2815_detach,
};
module_comedi_driver(dt2815_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
|
