2 comedi/drivers/dt2817.c
3 Hardware driver for Data Translation DT2817
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1998 David A. Schleef <ds@schleef.org>
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.
20 Description: Data Translation DT2817
23 Devices: [Data Translation] DT2817 (dt2817)
25 A very simple digital I/O card. Four banks of 8 lines, each bank
26 is configurable for input or output. One wonders why it takes a
27 50 page manual to describe this thing.
29 The driver (which, btw, is much less than 50 pages) has 1 subdevice
30 with 32 channels, configurable in groups of 8.
32 Configuration options:
33 [0] - I/O port base base address
36 #include <linux/module.h>
37 #include "../comedidev.h"
44 static int dt2817_dio_insn_config(struct comedi_device *dev,
45 struct comedi_subdevice *s,
46 struct comedi_insn *insn,
49 unsigned int chan = CR_CHAN(insn->chanspec);
63 ret = comedi_dio_insn_config(dev, s, insn, data, mask);
67 if (s->io_bits & 0x000000ff)
69 if (s->io_bits & 0x0000ff00)
71 if (s->io_bits & 0x00ff0000)
73 if (s->io_bits & 0xff000000)
76 outb(oe, dev->iobase + DT2817_CR);
81 static int dt2817_dio_insn_bits(struct comedi_device *dev,
82 struct comedi_subdevice *s,
83 struct comedi_insn *insn,
86 unsigned long iobase = dev->iobase + DT2817_DATA;
90 mask = comedi_dio_update_state(s, data);
92 if (mask & 0x000000ff)
93 outb(s->state & 0xff, iobase + 0);
94 if (mask & 0x0000ff00)
95 outb((s->state >> 8) & 0xff, iobase + 1);
96 if (mask & 0x00ff0000)
97 outb((s->state >> 16) & 0xff, iobase + 2);
98 if (mask & 0xff000000)
99 outb((s->state >> 24) & 0xff, iobase + 3);
102 val = inb(iobase + 0);
103 val |= (inb(iobase + 1) << 8);
104 val |= (inb(iobase + 2) << 16);
105 val |= (inb(iobase + 3) << 24);
112 static int dt2817_attach(struct comedi_device *dev, struct comedi_devconfig *it)
115 struct comedi_subdevice *s;
117 ret = comedi_request_region(dev, it->options[0], DT2817_SIZE);
121 ret = comedi_alloc_subdevices(dev, 1);
125 s = &dev->subdevices[0];
128 s->type = COMEDI_SUBD_DIO;
129 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
130 s->range_table = &range_digital;
132 s->insn_bits = dt2817_dio_insn_bits;
133 s->insn_config = dt2817_dio_insn_config;
136 outb(0, dev->iobase + DT2817_CR);
141 static struct comedi_driver dt2817_driver = {
142 .driver_name = "dt2817",
143 .module = THIS_MODULE,
144 .attach = dt2817_attach,
145 .detach = comedi_legacy_detach,
147 module_comedi_driver(dt2817_driver);
149 MODULE_AUTHOR("Comedi http://www.comedi.org");
150 MODULE_DESCRIPTION("Comedi low-level driver");
151 MODULE_LICENSE("GPL");