acl7225b.c revision 0707bb04be89b18ee83b5a997e36cc585f0b988d 
1/*
2 * comedi/drivers/acl7225b.c
3 * Driver for Adlink NuDAQ ACL-7225b and clones
4 * José Luis Sánchez
5 */
6/*
7Driver: acl7225b
8Description: Adlink NuDAQ ACL-7225b & compatibles
9Author: José Luis Sánchez (jsanchezv@teleline.es)
10Status: testing
11Devices: [Adlink] ACL-7225b (acl7225b), [ICP] P16R16DIO (p16r16dio)
12*/
13
14#include "../comedidev.h"
15
16#include <linux/ioport.h>
17
18#define ACL7225_SIZE   8	/* Requires 8 ioports, but only 4 are used */
19#define P16R16DIO_SIZE 4
20#define ACL7225_RIO_LO 0	/* Relays input/output low byte (R0-R7) */
21#define ACL7225_RIO_HI 1	/* Relays input/output high byte (R8-R15) */
22#define ACL7225_DI_LO  2	/* Digital input low byte (DI0-DI7) */
23#define ACL7225_DI_HI  3	/* Digital input high byte (DI8-DI15) */
24
25static int acl7225b_attach(struct comedi_device *dev, struct comedi_devconfig * it);
26static int acl7225b_detach(struct comedi_device *dev);
27
28typedef struct {
29	const char *name;	// driver name
30	int io_range;		// len of I/O space
31} boardtype;
32
33static const boardtype boardtypes[] = {
34	{"acl7225b", ACL7225_SIZE,},
35	{"p16r16dio", P16R16DIO_SIZE,},
36};
37
38#define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype))
39#define this_board ((const boardtype *)dev->board_ptr)
40
41static struct comedi_driver driver_acl7225b = {
42      driver_name:"acl7225b",
43      module:THIS_MODULE,
44      attach:acl7225b_attach,
45      detach:acl7225b_detach,
46      board_name:&boardtypes[0].name,
47      num_names:n_boardtypes,
48      offset:sizeof(boardtype),
49};
50
51COMEDI_INITCLEANUP(driver_acl7225b);
52
53static int acl7225b_do_insn(struct comedi_device *dev, struct comedi_subdevice * s,
54	struct comedi_insn * insn, unsigned int * data)
55{
56	if (insn->n != 2)
57		return -EINVAL;
58
59	if (data[0]) {
60		s->state &= ~data[0];
61		s->state |= (data[0] & data[1]);
62	}
63	if (data[0] & 0x00ff)
64		outb(s->state & 0xff, dev->iobase + (unsigned long)s->private);
65	if (data[0] & 0xff00)
66		outb((s->state >> 8),
67			dev->iobase + (unsigned long)s->private + 1);
68
69	data[1] = s->state;
70
71	return 2;
72}
73
74static int acl7225b_di_insn(struct comedi_device *dev, struct comedi_subdevice * s,
75	struct comedi_insn * insn, unsigned int * data)
76{
77	if (insn->n != 2)
78		return -EINVAL;
79
80	data[1] = inb(dev->iobase + (unsigned long)s->private) |
81		(inb(dev->iobase + (unsigned long)s->private + 1) << 8);
82
83	return 2;
84}
85
86static int acl7225b_attach(struct comedi_device *dev, struct comedi_devconfig * it)
87{
88	struct comedi_subdevice *s;
89	int iobase, iorange;
90
91	iobase = it->options[0];
92	iorange = this_board->io_range;
93	printk("comedi%d: acl7225b: board=%s 0x%04x ", dev->minor,
94		this_board->name, iobase);
95	if (!request_region(iobase, iorange, "acl7225b")) {
96		printk("I/O port conflict\n");
97		return -EIO;
98	}
99	dev->board_name = this_board->name;
100	dev->iobase = iobase;
101	dev->irq = 0;
102
103	if (alloc_subdevices(dev, 3) < 0)
104		return -ENOMEM;
105
106	s = dev->subdevices + 0;
107	/* Relays outputs */
108	s->type = COMEDI_SUBD_DO;
109	s->subdev_flags = SDF_WRITABLE;
110	s->maxdata = 1;
111	s->n_chan = 16;
112	s->insn_bits = acl7225b_do_insn;
113	s->range_table = &range_digital;
114	s->private = (void *)ACL7225_RIO_LO;
115
116	s = dev->subdevices + 1;
117	/* Relays status */
118	s->type = COMEDI_SUBD_DI;
119	s->subdev_flags = SDF_READABLE;
120	s->maxdata = 1;
121	s->n_chan = 16;
122	s->insn_bits = acl7225b_di_insn;
123	s->range_table = &range_digital;
124	s->private = (void *)ACL7225_RIO_LO;
125
126	s = dev->subdevices + 2;
127	/* Isolated digital inputs */
128	s->type = COMEDI_SUBD_DI;
129	s->subdev_flags = SDF_READABLE;
130	s->maxdata = 1;
131	s->n_chan = 16;
132	s->insn_bits = acl7225b_di_insn;
133	s->range_table = &range_digital;
134	s->private = (void *)ACL7225_DI_LO;
135
136	printk("\n");
137
138	return 0;
139}
140
141static int acl7225b_detach(struct comedi_device *dev)
142{
143	printk("comedi%d: acl7225b: remove\n", dev->minor);
144
145	if (dev->iobase)
146		release_region(dev->iobase, this_board->io_range);
147
148	return 0;
149}
150