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
|
/*
* COMEDI driver for Advantech PCI-1720U
* Copyright (c) 2015 H Hartley Sweeten <hsweeten@visionengravers.com>
*
* Separated from the adv_pci1710 driver written by:
* Michal Dobes <dobes@tesnet.cz>
*
* 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: adv_pci1720
* Description: 4-channel Isolated D/A Output board
* Devices: [Advantech] PCI-7120U (adv_pci1720)
* Author: H Hartley Sweeten <hsweeten@visionengravers.com>
* Updated: Fri, 29 Oct 2015 17:19:35 -0700
* Status: untested
*
* Configuration options: not applicable, uses PCI auto config
*
* The PCI-1720 has 4 isolated 12-bit analog output channels with multiple
* output ranges. It also has a BoardID switch to allow differentiating
* multiple boards in the system.
*
* The analog outputs can operate in two modes, immediate and synchronized.
* This driver currently does not support the synchronized output mode.
*
* Jumpers JP1 to JP4 are used to set the current sink ranges for each
* analog output channel. In order to use the current sink ranges, the
* unipolar 5V range must be used. The voltage output and sink output for
* each channel is available on the connector as separate pins.
*
* Jumper JP5 controls the "hot" reset state of the analog outputs.
* Depending on its setting, the analog outputs will either keep the
* last settings and output values or reset to the default state after
* a "hot" reset. The default state for all channels is uniploar 5V range
* and all the output values are 0V. To allow this feature to work, the
* analog outputs are not "reset" when the driver attaches.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include "../comedi_pci.h"
/*
* PCI BAR2 Register map (dev->iobase)
*/
#define PCI1720_AO_LSB_REG(x) (0x00 + ((x) * 2))
#define PCI1720_AO_MSB_REG(x) (0x01 + ((x) * 2))
#define PCI1720_AO_RANGE_REG 0x08
#define PCI1720_AO_RANGE(c, r) (((r) & 0x3) << ((c) * 2))
#define PCI1720_AO_RANGE_MASK(c) PCI1720_AO_RANGE((c), 0x3)
#define PCI1720_SYNC_REG 0x09
#define PCI1720_SYNC_CTRL_REG 0x0f
#define PCI1720_SYNC_CTRL_SC0 BIT(0)
#define PCI1720_BOARDID_REG 0x14
static const struct comedi_lrange pci1720_ao_range = {
4, {
UNI_RANGE(5),
UNI_RANGE(10),
BIP_RANGE(5),
BIP_RANGE(10)
}
};
static int pci1720_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 range = CR_RANGE(insn->chanspec);
unsigned int val;
int i;
/* set the channel range and polarity */
val = inb(dev->iobase + PCI1720_AO_RANGE_REG);
val &= ~PCI1720_AO_RANGE_MASK(chan);
val |= PCI1720_AO_RANGE(chan, range);
outb(val, dev->iobase + PCI1720_AO_RANGE_REG);
val = s->readback[chan];
for (i = 0; i < insn->n; i++) {
val = data[i];
outb(val & 0xff, dev->iobase + PCI1720_AO_LSB_REG(chan));
outb((val >> 8) & 0xff, dev->iobase + PCI1720_AO_MSB_REG(chan));
/* conversion time is 2us (500 kHz throughput) */
usleep_range(2, 100);
}
s->readback[chan] = val;
return insn->n;
}
static int pci1720_di_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
data[1] = inb(dev->iobase + PCI1720_BOARDID_REG);
return insn->n;
}
static int pci1720_auto_attach(struct comedi_device *dev,
unsigned long context)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
struct comedi_subdevice *s;
int ret;
ret = comedi_pci_enable(dev);
if (ret)
return ret;
dev->iobase = pci_resource_start(pcidev, 2);
ret = comedi_alloc_subdevices(dev, 2);
if (ret)
return ret;
/* Analog Output subdevice */
s = &dev->subdevices[0];
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 4;
s->maxdata = 0x0fff;
s->range_table = &pci1720_ao_range;
s->insn_write = pci1720_ao_insn_write;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
/* Digital Input subdevice (BoardID SW1) */
s = &dev->subdevices[1];
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->n_chan = 4;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = pci1720_di_insn_bits;
/* disable synchronized output, channels update when written */
outb(0, dev->iobase + PCI1720_SYNC_CTRL_REG);
return 0;
}
static struct comedi_driver adv_pci1720_driver = {
.driver_name = "adv_pci1720",
.module = THIS_MODULE,
.auto_attach = pci1720_auto_attach,
.detach = comedi_pci_detach,
};
static int adv_pci1720_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
return comedi_pci_auto_config(dev, &adv_pci1720_driver,
id->driver_data);
}
static const struct pci_device_id adv_pci1720_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1720) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, adv_pci1720_pci_table);
static struct pci_driver adv_pci1720_pci_driver = {
.name = "adv_pci1720",
.id_table = adv_pci1720_pci_table,
.probe = adv_pci1720_pci_probe,
.remove = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(adv_pci1720_driver, adv_pci1720_pci_driver);
MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>");
MODULE_DESCRIPTION("Comedi driver for Advantech PCI-1720 Analog Output board");
MODULE_LICENSE("GPL");
|
