3 comedi/drivers/aio_aio12_8.c
5 Driver for Acces I/O Products PC-104 AIO12-8 Analog I/O Board
6 Copyright (C) 2006 C&C Technologies, Inc.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 Description: Acces I/O Products PC-104 AIO12-8 Analog I/O Board
27 Author: Pablo Mejia <pablo.mejia@cctechnol.com>
29 [Acces I/O] PC-104 AIO12-8
32 Configuration Options:
33 [0] - I/O port base address
37 Only synchronous operations are supported.
41 #include "../comedidev.h"
42 #include <linux/ioport.h>
45 #define AIO12_8_STATUS 0x00
46 #define AIO12_8_INTERRUPT 0x01
47 #define AIO12_8_ADC 0x02
48 #define AIO12_8_DAC_0 0x04
49 #define AIO12_8_DAC_1 0x06
50 #define AIO12_8_DAC_2 0x08
51 #define AIO12_8_DAC_3 0x0A
52 #define AIO12_8_COUNTER_0 0x0C
53 #define AIO12_8_COUNTER_1 0x0D
54 #define AIO12_8_COUNTER_2 0x0E
55 #define AIO12_8_COUNTER_CONTROL 0x0F
56 #define AIO12_8_DIO_0 0x10
57 #define AIO12_8_DIO_1 0x11
58 #define AIO12_8_DIO_2 0x12
59 #define AIO12_8_DIO_STATUS 0x13
60 #define AIO12_8_DIO_CONTROL 0x14
61 #define AIO12_8_ADC_TRIGGER_CONTROL 0x15
62 #define AIO12_8_TRIGGER 0x16
63 #define AIO12_8_POWER 0x17
65 #define STATUS_ADC_EOC 0x80
67 #define ADC_MODE_NORMAL 0x00
68 #define ADC_MODE_INTERNAL_CLOCK 0x40
69 #define ADC_MODE_STANDBY 0x80
70 #define ADC_MODE_POWERDOWN 0xC0
72 #define DAC_ENABLE 0x18
78 static const board_type board_types[] = {
83 #define thisboard ((const board_type *) dev->board_ptr)
86 unsigned int ao_readback[4];
89 #define devpriv ((aio12_8_private *) dev->private)
91 static int aio_aio12_8_ai_read(struct comedi_device * dev, struct comedi_subdevice * s,
92 struct comedi_insn * insn, unsigned int * data)
95 unsigned char control =
97 (CR_RANGE(insn->chanspec) << 3) | CR_CHAN(insn->chanspec);
99 //read status to clear EOC latch
100 inb(dev->iobase + AIO12_8_STATUS);
102 for (n = 0; n < insn->n; n++) {
105 // Setup and start conversion
106 outb(control, dev->iobase + AIO12_8_ADC);
108 // Wait for conversion to complete
110 !(inb(dev->iobase + AIO12_8_STATUS) & STATUS_ADC_EOC)) {
112 printk("timeout %d\n", timeout);
116 comedi_error(dev, "ADC timeout");
120 data[n] = inw(dev->iobase + AIO12_8_ADC) & 0x0FFF;
125 static int aio_aio12_8_ao_read(struct comedi_device * dev, struct comedi_subdevice * s,
126 struct comedi_insn * insn, unsigned int * data)
129 int val = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
131 for (i = 0; i < insn->n; i++)
136 static int aio_aio12_8_ao_write(struct comedi_device * dev, struct comedi_subdevice * s,
137 struct comedi_insn * insn, unsigned int * data)
140 int chan = CR_CHAN(insn->chanspec);
141 unsigned long port = dev->iobase + AIO12_8_DAC_0 + (2 * chan);
144 outb(0x01, dev->iobase + DAC_ENABLE);
146 for (i = 0; i < insn->n; i++) {
147 outb(data[i] & 0xFF, port); // LSB
148 outb((data[i] >> 8) & 0x0F, port + 1); // MSB
149 devpriv->ao_readback[chan] = data[i];
154 static const struct comedi_lrange range_aio_aio12_8 = {
164 static int aio_aio12_8_attach(struct comedi_device * dev, comedi_devconfig * it)
167 struct comedi_subdevice *s;
169 iobase = it->options[0];
170 if (!request_region(iobase, 24, "aio_aio12_8")) {
171 printk("I/O port conflict");
175 dev->board_name = thisboard->name;
177 dev->iobase = iobase;
179 if (alloc_private(dev, sizeof(aio12_8_private)) < 0)
182 if (alloc_subdevices(dev, 3) < 0)
185 s = &dev->subdevices[0];
186 s->type = COMEDI_SUBD_AI;
187 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
189 s->maxdata = (1 << 12) - 1;
190 s->range_table = &range_aio_aio12_8;
191 s->insn_read = aio_aio12_8_ai_read;
193 s = &dev->subdevices[1];
194 s->type = COMEDI_SUBD_AO;
195 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_DIFF;
197 s->maxdata = (1 << 12) - 1;
198 s->range_table = &range_aio_aio12_8;
199 s->insn_read = aio_aio12_8_ao_read;
200 s->insn_write = aio_aio12_8_ao_write;
202 s = &dev->subdevices[2];
203 subdev_8255_init(dev, s, NULL, dev->iobase + AIO12_8_DIO_0);
208 static int aio_aio12_8_detach(struct comedi_device * dev)
210 subdev_8255_cleanup(dev, &dev->subdevices[2]);
212 release_region(dev->iobase, 24);
216 static struct comedi_driver driver_aio_aio12_8 = {
217 driver_name:"aio_aio12_8",
219 attach:aio_aio12_8_attach,
220 detach:aio_aio12_8_detach,
221 board_name:&board_types[0].name,
223 offset:sizeof(board_type),
226 COMEDI_INITCLEANUP(driver_aio_aio12_8);