1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * fl512.c
4 * Anders Gnistrup <ex18@kalman.iau.dtu.dk>
5 *
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 */
9
10/*
11 * Driver: fl512
12 * Description: unknown
13 * Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
14 * Devices: [unknown] FL512 (fl512)
15 * Status: unknown
16 *
17 * Digital I/O is not supported.
18 *
19 * Configuration options:
20 * [0] - I/O port base address
21 */
22
23#include <linux/module.h>
24#include <linux/comedi/comedidev.h>
25#include <linux/delay.h>
26
27/*
28 * Register I/O map
29 */
30#define FL512_AI_LSB_REG 0x02
31#define FL512_AI_MSB_REG 0x03
32#define FL512_AI_MUX_REG 0x02
33#define FL512_AI_START_CONV_REG 0x03
34#define FL512_AO_DATA_REG(x) (0x04 + ((x) * 2))
35#define FL512_AO_TRIG_REG(x) (0x04 + ((x) * 2))
36
37static const struct comedi_lrange range_fl512 = {
38 4, {
39 BIP_RANGE(0.5),
40 BIP_RANGE(1),
41 BIP_RANGE(5),
42 BIP_RANGE(10),
43 UNI_RANGE(1),
44 UNI_RANGE(5),
45 UNI_RANGE(10)
46 }
47};
48
49static int fl512_ai_insn_read(struct comedi_device *dev,
50 struct comedi_subdevice *s,
51 struct comedi_insn *insn,
52 unsigned int *data)
53{
54 unsigned int chan = CR_CHAN(insn->chanspec);
55 unsigned int val;
56 int i;
57
58 outb(value: chan, port: dev->iobase + FL512_AI_MUX_REG);
59
60 for (i = 0; i < insn->n; i++) {
61 outb(value: 0, port: dev->iobase + FL512_AI_START_CONV_REG);
62
63 /* XXX should test "done" flag instead of delay */
64 usleep_range(min: 30, max: 100);
65
66 val = inb(port: dev->iobase + FL512_AI_LSB_REG);
67 val |= (inb(port: dev->iobase + FL512_AI_MSB_REG) << 8);
68 val &= s->maxdata;
69
70 data[i] = val;
71 }
72
73 return insn->n;
74}
75
76static int fl512_ao_insn_write(struct comedi_device *dev,
77 struct comedi_subdevice *s,
78 struct comedi_insn *insn,
79 unsigned int *data)
80{
81 unsigned int chan = CR_CHAN(insn->chanspec);
82 unsigned int val = s->readback[chan];
83 int i;
84
85 for (i = 0; i < insn->n; i++) {
86 val = data[i];
87
88 /* write LSB, MSB then trigger conversion */
89 outb(value: val & 0x0ff, port: dev->iobase + FL512_AO_DATA_REG(chan));
90 outb(value: (val >> 8) & 0xf, port: dev->iobase + FL512_AO_DATA_REG(chan));
91 inb(port: dev->iobase + FL512_AO_TRIG_REG(chan));
92 }
93 s->readback[chan] = val;
94
95 return insn->n;
96}
97
98static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it)
99{
100 struct comedi_subdevice *s;
101 int ret;
102
103 ret = comedi_request_region(dev, start: it->options[0], len: 0x10);
104 if (ret)
105 return ret;
106
107 ret = comedi_alloc_subdevices(dev, num_subdevices: 2);
108 if (ret)
109 return ret;
110
111 /* Analog Input subdevice */
112 s = &dev->subdevices[0];
113 s->type = COMEDI_SUBD_AI;
114 s->subdev_flags = SDF_READABLE | SDF_GROUND;
115 s->n_chan = 16;
116 s->maxdata = 0x0fff;
117 s->range_table = &range_fl512;
118 s->insn_read = fl512_ai_insn_read;
119
120 /* Analog Output subdevice */
121 s = &dev->subdevices[1];
122 s->type = COMEDI_SUBD_AO;
123 s->subdev_flags = SDF_WRITABLE;
124 s->n_chan = 2;
125 s->maxdata = 0x0fff;
126 s->range_table = &range_fl512;
127 s->insn_write = fl512_ao_insn_write;
128
129 return comedi_alloc_subdev_readback(s);
130}
131
132static struct comedi_driver fl512_driver = {
133 .driver_name = "fl512",
134 .module = THIS_MODULE,
135 .attach = fl512_attach,
136 .detach = comedi_legacy_detach,
137};
138module_comedi_driver(fl512_driver);
139
140MODULE_AUTHOR("Comedi https://www.comedi.org");
141MODULE_DESCRIPTION("Comedi low-level driver");
142MODULE_LICENSE("GPL");
143

source code of linux/drivers/comedi/drivers/fl512.c