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
|
/*
comedi/drivers/aio_aio12_8.c
Driver for Access I/O Products PC-104 AIO12-8 Analog I/O Board
Copyright (C) 2006 C&C Technologies, Inc.
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: aio_aio12_8
Description: Access I/O Products PC-104 AIO12-8 Analog I/O Board
Author: Pablo Mejia <pablo.mejia@cctechnol.com>
Devices: [Access I/O] PC-104 AIO12-8 (aio_aio12_8)
[Access I/O] PC-104 AI12-8 (aio_ai12_8)
[Access I/O] PC-104 AO12-8 (aio_ao12_8)
Status: experimental
Configuration Options:
[0] - I/O port base address
Notes:
Only synchronous operations are supported.
*/
#include <linux/module.h>
#include "../comedidev.h"
#include "8255.h"
/*
* Register map
*/
#define AIO12_8_STATUS_REG 0x00
#define AIO12_8_STATUS_ADC_EOC (1 << 7)
#define AIO12_8_STATUS_PORT_C_COS (1 << 6)
#define AIO12_8_STATUS_IRQ_ENA (1 << 2)
#define AIO12_8_INTERRUPT_REG 0x01
#define AIO12_8_INTERRUPT_ADC (1 << 7)
#define AIO12_8_INTERRUPT_COS (1 << 6)
#define AIO12_8_INTERRUPT_COUNTER1 (1 << 5)
#define AIO12_8_INTERRUPT_PORT_C3 (1 << 4)
#define AIO12_8_INTERRUPT_PORT_C0 (1 << 3)
#define AIO12_8_INTERRUPT_ENA (1 << 2)
#define AIO12_8_ADC_REG 0x02
#define AIO12_8_ADC_MODE_NORMAL (0 << 6)
#define AIO12_8_ADC_MODE_INT_CLK (1 << 6)
#define AIO12_8_ADC_MODE_STANDBY (2 << 6)
#define AIO12_8_ADC_MODE_POWERDOWN (3 << 6)
#define AIO12_8_ADC_ACQ_3USEC (0 << 5)
#define AIO12_8_ADC_ACQ_PROGRAM (1 << 5)
#define AIO12_8_ADC_RANGE(x) ((x) << 3)
#define AIO12_8_ADC_CHAN(x) ((x) << 0)
#define AIO12_8_DAC_REG(x) (0x04 + (x) * 2)
#define AIO12_8_8254_BASE_REG 0x0c
#define AIO12_8_8255_BASE_REG 0x10
#define AIO12_8_DIO_CONTROL_REG 0x14
#define AIO12_8_DIO_CONTROL_TST (1 << 0)
#define AIO12_8_ADC_TRIGGER_REG 0x15
#define AIO12_8_ADC_TRIGGER_RANGE(x) ((x) << 3)
#define AIO12_8_ADC_TRIGGER_CHAN(x) ((x) << 0)
#define AIO12_8_TRIGGER_REG 0x16
#define AIO12_8_TRIGGER_ADTRIG (1 << 1)
#define AIO12_8_TRIGGER_DACTRIG (1 << 0)
#define AIO12_8_COS_REG 0x17
#define AIO12_8_DAC_ENABLE_REG 0x18
#define AIO12_8_DAC_ENABLE_REF_ENA (1 << 0)
struct aio12_8_boardtype {
const char *name;
int ai_nchan;
int ao_nchan;
};
static const struct aio12_8_boardtype board_types[] = {
{
.name = "aio_aio12_8",
.ai_nchan = 8,
.ao_nchan = 4,
}, {
.name = "aio_ai12_8",
.ai_nchan = 8,
}, {
.name = "aio_ao12_8",
.ao_nchan = 4,
},
};
static int aio_aio12_8_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
unsigned int status;
status = inb(dev->iobase + AIO12_8_STATUS_REG);
if (status & AIO12_8_STATUS_ADC_EOC)
return 0;
return -EBUSY;
}
static int aio_aio12_8_ai_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int range = CR_RANGE(insn->chanspec);
unsigned char control;
int ret;
int n;
/*
* Setup the control byte for internal 2MHz clock, 3uS conversion,
* at the desired range of the requested channel.
*/
control = AIO12_8_ADC_MODE_NORMAL | AIO12_8_ADC_ACQ_3USEC |
AIO12_8_ADC_RANGE(range) | AIO12_8_ADC_CHAN(chan);
/* Read status to clear EOC latch */
inb(dev->iobase + AIO12_8_STATUS_REG);
for (n = 0; n < insn->n; n++) {
/* Setup and start conversion */
outb(control, dev->iobase + AIO12_8_ADC_REG);
/* Wait for conversion to complete */
ret = comedi_timeout(dev, s, insn, aio_aio12_8_ai_eoc, 0);
if (ret)
return ret;
data[n] = inw(dev->iobase + AIO12_8_ADC_REG) & s->maxdata;
}
return insn->n;
}
static int aio_aio12_8_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val = s->readback[chan];
int i;
/* enable DACs */
outb(AIO12_8_DAC_ENABLE_REF_ENA, dev->iobase + AIO12_8_DAC_ENABLE_REG);
for (i = 0; i < insn->n; i++) {
val = data[i];
outw(val, dev->iobase + AIO12_8_DAC_REG(chan));
}
s->readback[chan] = val;
return insn->n;
}
static const struct comedi_lrange range_aio_aio12_8 = {
4, {
UNI_RANGE(5),
BIP_RANGE(5),
UNI_RANGE(10),
BIP_RANGE(10)
}
};
static int aio_aio12_8_attach(struct comedi_device *dev,
struct comedi_devconfig *it)
{
const struct aio12_8_boardtype *board = dev->board_ptr;
struct comedi_subdevice *s;
int ret;
ret = comedi_request_region(dev, it->options[0], 32);
if (ret)
return ret;
ret = comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;
s = &dev->subdevices[0];
if (board->ai_nchan) {
/* Analog input subdevice */
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
s->n_chan = board->ai_nchan;
s->maxdata = 0x0fff;
s->range_table = &range_aio_aio12_8;
s->insn_read = aio_aio12_8_ai_read;
} else {
s->type = COMEDI_SUBD_UNUSED;
}
s = &dev->subdevices[1];
if (board->ao_nchan) {
/* Analog output subdevice */
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_DIFF;
s->n_chan = 4;
s->maxdata = 0x0fff;
s->range_table = &range_aio_aio12_8;
s->insn_write = aio_aio12_8_ao_insn_write;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
} else {
s->type = COMEDI_SUBD_UNUSED;
}
s = &dev->subdevices[2];
/* 8255 Digital i/o subdevice */
ret = subdev_8255_init(dev, s, NULL, AIO12_8_8255_BASE_REG);
if (ret)
return ret;
s = &dev->subdevices[3];
/* 8254 counter/timer subdevice */
s->type = COMEDI_SUBD_UNUSED;
return 0;
}
static struct comedi_driver aio_aio12_8_driver = {
.driver_name = "aio_aio12_8",
.module = THIS_MODULE,
.attach = aio_aio12_8_attach,
.detach = comedi_legacy_detach,
.board_name = &board_types[0].name,
.num_names = ARRAY_SIZE(board_types),
.offset = sizeof(struct aio12_8_boardtype),
};
module_comedi_driver(aio_aio12_8_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
|
