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 | |
37 | static 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 | |
49 | static 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 | |
76 | static 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 | |
98 | static 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 | |
132 | static struct comedi_driver fl512_driver = { |
133 | .driver_name = "fl512" , |
134 | .module = THIS_MODULE, |
135 | .attach = fl512_attach, |
136 | .detach = comedi_legacy_detach, |
137 | }; |
138 | module_comedi_driver(fl512_driver); |
139 | |
140 | MODULE_AUTHOR("Comedi https://www.comedi.org" ); |
141 | MODULE_DESCRIPTION("Comedi low-level driver" ); |
142 | MODULE_LICENSE("GPL" ); |
143 | |