1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * pcl724.c
4 * Comedi driver for 8255 based ISA and PC/104 DIO boards
5 *
6 * Michal Dobes <dobes@tesnet.cz>
7 */
8
9 /*
10 * Driver: pcl724
11 * Description: Comedi driver for 8255 based ISA DIO boards
12 * Devices: [Advantech] PCL-724 (pcl724), PCL-722 (pcl722), PCL-731 (pcl731),
13 * [ADLink] ACL-7122 (acl7122), ACL-7124 (acl7124), PET-48DIO (pet48dio),
14 * [WinSystems] PCM-IO48 (pcmio48),
15 * [Diamond Systems] ONYX-MM-DIO (onyx-mm-dio)
16 * Author: Michal Dobes <dobes@tesnet.cz>
17 * Status: untested
18 *
19 * Configuration options:
20 * [0] - IO Base
21 * [1] - IRQ (not supported)
22 * [2] - number of DIO (pcl722 and acl7122 boards)
23 * 0, 144: 144 DIO configuration
24 * 1, 96: 96 DIO configuration
25 */
26
27 #include <linux/module.h>
28 #include "../comedidev.h"
29
30 #include "8255.h"
31
32 struct pcl724_board {
33 const char *name;
34 unsigned int io_range;
35 unsigned int can_have96:1;
36 unsigned int is_pet48:1;
37 int numofports;
38 };
39
40 static const struct pcl724_board boardtypes[] = {
41 {
42 .name = "pcl724",
43 .io_range = 0x04,
44 .numofports = 1, /* 24 DIO channels */
45 }, {
46 .name = "pcl722",
47 .io_range = 0x20,
48 .can_have96 = 1,
49 .numofports = 6, /* 144 (or 96) DIO channels */
50 }, {
51 .name = "pcl731",
52 .io_range = 0x08,
53 .numofports = 2, /* 48 DIO channels */
54 }, {
55 .name = "acl7122",
56 .io_range = 0x20,
57 .can_have96 = 1,
58 .numofports = 6, /* 144 (or 96) DIO channels */
59 }, {
60 .name = "acl7124",
61 .io_range = 0x04,
62 .numofports = 1, /* 24 DIO channels */
63 }, {
64 .name = "pet48dio",
65 .io_range = 0x02,
66 .is_pet48 = 1,
67 .numofports = 2, /* 48 DIO channels */
68 }, {
69 .name = "pcmio48",
70 .io_range = 0x08,
71 .numofports = 2, /* 48 DIO channels */
72 }, {
73 .name = "onyx-mm-dio",
74 .io_range = 0x10,
75 .numofports = 2, /* 48 DIO channels */
76 },
77 };
78
pcl724_8255mapped_io(struct comedi_device * dev,int dir,int port,int data,unsigned long iobase)79 static int pcl724_8255mapped_io(struct comedi_device *dev,
80 int dir, int port, int data,
81 unsigned long iobase)
82 {
83 int movport = I8255_SIZE * (iobase >> 12);
84
85 iobase &= 0x0fff;
86
87 outb(port + movport, iobase);
88 if (dir) {
89 outb(data, iobase + 1);
90 return 0;
91 }
92 return inb(iobase + 1);
93 }
94
pcl724_attach(struct comedi_device * dev,struct comedi_devconfig * it)95 static int pcl724_attach(struct comedi_device *dev,
96 struct comedi_devconfig *it)
97 {
98 const struct pcl724_board *board = dev->board_ptr;
99 struct comedi_subdevice *s;
100 unsigned long iobase;
101 unsigned int iorange;
102 int n_subdevices;
103 int ret;
104 int i;
105
106 iorange = board->io_range;
107 n_subdevices = board->numofports;
108
109 /* Handle PCL-724 in 96 DIO configuration */
110 if (board->can_have96 &&
111 (it->options[2] == 1 || it->options[2] == 96)) {
112 iorange = 0x10;
113 n_subdevices = 4;
114 }
115
116 ret = comedi_request_region(dev, it->options[0], iorange);
117 if (ret)
118 return ret;
119
120 ret = comedi_alloc_subdevices(dev, n_subdevices);
121 if (ret)
122 return ret;
123
124 for (i = 0; i < dev->n_subdevices; i++) {
125 s = &dev->subdevices[i];
126 if (board->is_pet48) {
127 iobase = dev->iobase + (i * 0x1000);
128 ret = subdev_8255_init(dev, s, pcl724_8255mapped_io,
129 iobase);
130 } else {
131 ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
132 }
133 if (ret)
134 return ret;
135 }
136
137 return 0;
138 }
139
140 static struct comedi_driver pcl724_driver = {
141 .driver_name = "pcl724",
142 .module = THIS_MODULE,
143 .attach = pcl724_attach,
144 .detach = comedi_legacy_detach,
145 .board_name = &boardtypes[0].name,
146 .num_names = ARRAY_SIZE(boardtypes),
147 .offset = sizeof(struct pcl724_board),
148 };
149 module_comedi_driver(pcl724_driver);
150
151 MODULE_AUTHOR("Comedi https://www.comedi.org");
152 MODULE_DESCRIPTION("Comedi driver for 8255 based ISA and PC/104 DIO boards");
153 MODULE_LICENSE("GPL");
154