1/*
2    comedi/drivers/amplc_pc263.c
3    Driver for Amplicon PC263 and PCI263 relay boards.
4
5    Copyright (C) 2002 MEV Ltd. <http://www.mev.co.uk/>
6
7    COMEDI - Linux Control and Measurement Device Interface
8    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
9
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 2 of the License, or
13    (at your option) any later version.
14
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19*/
20/*
21Driver: amplc_pc263
22Description: Amplicon PC263
23Author: Ian Abbott <abbotti@mev.co.uk>
24Devices: [Amplicon] PC263 (pc263)
25Updated: Fri, 12 Apr 2013 15:19:36 +0100
26Status: works
27
28Configuration options:
29  [0] - I/O port base address
30
31The board appears as one subdevice, with 16 digital outputs, each
32connected to a reed-relay. Relay contacts are closed when output is 1.
33The state of the outputs can be read.
34*/
35
36#include <linux/module.h>
37#include "../comedidev.h"
38
39/* PC263 registers */
40
41/*
42 * Board descriptions for Amplicon PC263.
43 */
44
45struct pc263_board {
46	const char *name;
47};
48
49static const struct pc263_board pc263_boards[] = {
50	{
51		.name = "pc263",
52	},
53};
54
55static int pc263_do_insn_bits(struct comedi_device *dev,
56			      struct comedi_subdevice *s,
57			      struct comedi_insn *insn,
58			      unsigned int *data)
59{
60	if (comedi_dio_update_state(s, data)) {
61		outb(s->state & 0xff, dev->iobase);
62		outb((s->state >> 8) & 0xff, dev->iobase + 1);
63	}
64
65	data[1] = s->state;
66
67	return insn->n;
68}
69
70static int pc263_attach(struct comedi_device *dev, struct comedi_devconfig *it)
71{
72	struct comedi_subdevice *s;
73	int ret;
74
75	ret = comedi_request_region(dev, it->options[0], 0x2);
76	if (ret)
77		return ret;
78
79	ret = comedi_alloc_subdevices(dev, 1);
80	if (ret)
81		return ret;
82
83	s = &dev->subdevices[0];
84	/* digital output subdevice */
85	s->type = COMEDI_SUBD_DO;
86	s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
87	s->n_chan = 16;
88	s->maxdata = 1;
89	s->range_table = &range_digital;
90	s->insn_bits = pc263_do_insn_bits;
91	/* read initial relay state */
92	s->state = inb(dev->iobase) | (inb(dev->iobase + 1) << 8);
93
94	return 0;
95}
96
97static struct comedi_driver amplc_pc263_driver = {
98	.driver_name = "amplc_pc263",
99	.module = THIS_MODULE,
100	.attach = pc263_attach,
101	.detach = comedi_legacy_detach,
102	.board_name = &pc263_boards[0].name,
103	.offset = sizeof(struct pc263_board),
104	.num_names = ARRAY_SIZE(pc263_boards),
105};
106
107module_comedi_driver(amplc_pc263_driver);
108
109MODULE_AUTHOR("Comedi http://www.comedi.org");
110MODULE_DESCRIPTION("Comedi driver for Amplicon PC263 relay board");
111MODULE_LICENSE("GPL");
112