acl7225b.c revision 0a85b6f0ab0d2edb0d41b32697111ce0e4f43496 
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,
26			   struct comedi_devconfig *it);
27static int acl7225b_detach(struct comedi_device *dev);
28
29struct boardtype {
30	const char *name;	/*  driver name */
31	int io_range;		/*  len of I/O space */
32};
33
34static const struct boardtype boardtypes[] = {
35	{"acl7225b", ACL7225_SIZE,},
36	{"p16r16dio", P16R16DIO_SIZE,},
37};
38
39#define n_boardtypes (sizeof(boardtypes)/sizeof(struct boardtype))
40#define this_board ((const struct boardtype *)dev->board_ptr)
41
42static struct comedi_driver driver_acl7225b = {
43	.driver_name = "acl7225b",
44	.module = THIS_MODULE,
45	.attach = acl7225b_attach,
46	.detach = acl7225b_detach,
47	.board_name = &boardtypes[0].name,
48	.num_names = n_boardtypes,
49	.offset = sizeof(struct boardtype),
50};
51
52COMEDI_INITCLEANUP(driver_acl7225b);
53
54static int acl7225b_do_insn(struct comedi_device *dev,
55			    struct comedi_subdevice *s,
56			    struct comedi_insn *insn, unsigned int *data)
57{
58	if (insn->n != 2)
59		return -EINVAL;
60
61	if (data[0]) {
62		s->state &= ~data[0];
63		s->state |= (data[0] & data[1]);
64	}
65	if (data[0] & 0x00ff)
66		outb(s->state & 0xff, dev->iobase + (unsigned long)s->private);
67	if (data[0] & 0xff00)
68		outb((s->state >> 8),
69		     dev->iobase + (unsigned long)s->private + 1);
70
71	data[1] = s->state;
72
73	return 2;
74}
75
76static int acl7225b_di_insn(struct comedi_device *dev,
77			    struct comedi_subdevice *s,
78			    struct comedi_insn *insn, unsigned int *data)
79{
80	if (insn->n != 2)
81		return -EINVAL;
82
83	data[1] = inb(dev->iobase + (unsigned long)s->private) |
84	    (inb(dev->iobase + (unsigned long)s->private + 1) << 8);
85
86	return 2;
87}
88
89static int acl7225b_attach(struct comedi_device *dev,
90			   struct comedi_devconfig *it)
91{
92	struct comedi_subdevice *s;
93	int iobase, iorange;
94
95	iobase = it->options[0];
96	iorange = this_board->io_range;
97	printk("comedi%d: acl7225b: board=%s 0x%04x ", dev->minor,
98	       this_board->name, iobase);
99	if (!request_region(iobase, iorange, "acl7225b")) {
100		printk("I/O port conflict\n");
101		return -EIO;
102	}
103	dev->board_name = this_board->name;
104	dev->iobase = iobase;
105	dev->irq = 0;
106
107	if (alloc_subdevices(dev, 3) < 0)
108		return -ENOMEM;
109
110	s = dev->subdevices + 0;
111	/* Relays outputs */
112	s->type = COMEDI_SUBD_DO;
113	s->subdev_flags = SDF_WRITABLE;
114	s->maxdata = 1;
115	s->n_chan = 16;
116	s->insn_bits = acl7225b_do_insn;
117	s->range_table = &range_digital;
118	s->private = (void *)ACL7225_RIO_LO;
119
120	s = dev->subdevices + 1;
121	/* Relays status */
122	s->type = COMEDI_SUBD_DI;
123	s->subdev_flags = SDF_READABLE;
124	s->maxdata = 1;
125	s->n_chan = 16;
126	s->insn_bits = acl7225b_di_insn;
127	s->range_table = &range_digital;
128	s->private = (void *)ACL7225_RIO_LO;
129
130	s = dev->subdevices + 2;
131	/* Isolated digital inputs */
132	s->type = COMEDI_SUBD_DI;
133	s->subdev_flags = SDF_READABLE;
134	s->maxdata = 1;
135	s->n_chan = 16;
136	s->insn_bits = acl7225b_di_insn;
137	s->range_table = &range_digital;
138	s->private = (void *)ACL7225_DI_LO;
139
140	printk("\n");
141
142	return 0;
143}
144
145static int acl7225b_detach(struct comedi_device *dev)
146{
147	printk("comedi%d: acl7225b: remove\n", dev->minor);
148
149	if (dev->iobase)
150		release_region(dev->iobase, this_board->io_range);
151
152	return 0;
153}
154