Commit | Line | Data |
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647d8b45 | 1 | /* |
15bc85bd HS |
2 | * pcmda12.c |
3 | * Driver for Winsystems PC-104 based PCM-D/A-12 8-channel AO board. | |
4 | * | |
5 | * COMEDI - Linux Control and Measurement Device Interface | |
6 | * Copyright (C) 2006 Calin A. Culianu <calin@ajvar.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | */ | |
647d8b45 | 18 | |
647d8b45 | 19 | /* |
15bc85bd HS |
20 | * Driver: pcmda12 |
21 | * Description: A driver for the Winsystems PCM-D/A-12 | |
8d4e620e | 22 | * Devices: [Winsystems] PCM-D/A-12 (pcmda12) |
15bc85bd HS |
23 | * Author: Calin Culianu <calin@ajvar.org> |
24 | * Updated: Fri, 13 Jan 2006 12:01:01 -0500 | |
25 | * Status: works | |
26 | * | |
27 | * A driver for the relatively straightforward-to-program PCM-D/A-12. | |
28 | * This board doesn't support commands, and the only way to set its | |
29 | * analog output range is to jumper the board. As such, | |
30 | * comedi_data_write() ignores the range value specified. | |
31 | * | |
32 | * The board uses 16 consecutive I/O addresses starting at the I/O port | |
33 | * base address. Each address corresponds to the LSB then MSB of a | |
34 | * particular channel from 0-7. | |
35 | * | |
36 | * Note that the board is not ISA-PNP capable and thus needs the I/O | |
37 | * port comedi_config parameter. | |
38 | * | |
39 | * Note that passing a nonzero value as the second config option will | |
40 | * enable "simultaneous xfer" mode for this board, in which AO writes | |
41 | * will not take effect until a subsequent read of any AO channel. This | |
42 | * is so that one can speed up programming by preloading all AO registers | |
43 | * with values before simultaneously setting them to take effect with one | |
44 | * read command. | |
45 | * | |
46 | * Configuration Options: | |
47 | * [0] - I/O port base address | |
48 | * [1] - Do Simultaneous Xfer (see description) | |
49 | */ | |
647d8b45 | 50 | |
ce157f80 | 51 | #include <linux/module.h> |
647d8b45 CC |
52 | #include "../comedidev.h" |
53 | ||
d6b354d2 | 54 | /* AI range is not configurable, it's set by jumpers on the board */ |
9ced1de6 | 55 | static const struct comedi_lrange pcmda12_ranges = { |
d6b354d2 HS |
56 | 3, { |
57 | UNI_RANGE(5), | |
58 | UNI_RANGE(10), | |
59 | BIP_RANGE(5) | |
60 | } | |
647d8b45 CC |
61 | }; |
62 | ||
39eb312d | 63 | struct pcmda12_private { |
647d8b45 | 64 | int simultaneous_xfer_mode; |
39eb312d BP |
65 | }; |
66 | ||
b11c5d3c HS |
67 | static int pcmda12_ao_insn_write(struct comedi_device *dev, |
68 | struct comedi_subdevice *s, | |
69 | struct comedi_insn *insn, | |
70 | unsigned int *data) | |
924f4685 | 71 | { |
9a1a6cf8 | 72 | struct pcmda12_private *devpriv = dev->private; |
f0dc084e | 73 | unsigned int chan = CR_CHAN(insn->chanspec); |
bf90bbd6 | 74 | unsigned int val = s->readback[chan]; |
78b2db4f | 75 | unsigned long ioreg = dev->iobase + (chan * 2); |
924f4685 | 76 | int i; |
647d8b45 | 77 | |
924f4685 | 78 | for (i = 0; i < insn->n; ++i) { |
f0dc084e | 79 | val = data[i]; |
78b2db4f HS |
80 | outb(val & 0xff, ioreg); |
81 | outb((val >> 8) & 0xff, ioreg + 1); | |
f0dc084e HS |
82 | |
83 | /* | |
84 | * Initiate transfer if not in simultaneaous xfer | |
85 | * mode by reading one of the AO registers. | |
86 | */ | |
924f4685 | 87 | if (!devpriv->simultaneous_xfer_mode) |
78b2db4f | 88 | inb(ioreg); |
924f4685 | 89 | } |
bf90bbd6 | 90 | s->readback[chan] = val; |
924f4685 | 91 | |
f0dc084e | 92 | return insn->n; |
924f4685 HS |
93 | } |
94 | ||
b11c5d3c HS |
95 | static int pcmda12_ao_insn_read(struct comedi_device *dev, |
96 | struct comedi_subdevice *s, | |
97 | struct comedi_insn *insn, | |
98 | unsigned int *data) | |
924f4685 | 99 | { |
9a1a6cf8 | 100 | struct pcmda12_private *devpriv = dev->private; |
924f4685 | 101 | |
cac10bf9 HS |
102 | /* |
103 | * Initiate simultaneaous xfer mode by reading one of the | |
104 | * AO registers. All analog outputs will then be updated. | |
105 | */ | |
106 | if (devpriv->simultaneous_xfer_mode) | |
78b2db4f | 107 | inb(dev->iobase); |
cac10bf9 | 108 | |
bf90bbd6 | 109 | return comedi_readback_insn_read(dev, s, insn, data); |
924f4685 | 110 | } |
647d8b45 | 111 | |
ef7654c0 HS |
112 | static void pcmda12_ao_reset(struct comedi_device *dev, |
113 | struct comedi_subdevice *s) | |
114 | { | |
115 | int i; | |
116 | ||
117 | for (i = 0; i < s->n_chan; ++i) { | |
118 | outb(0, dev->iobase + (i * 2)); | |
119 | outb(0, dev->iobase + (i * 2) + 1); | |
120 | } | |
121 | /* Initiate transfer by reading one of the AO registers. */ | |
122 | inb(dev->iobase); | |
123 | } | |
124 | ||
0a85b6f0 MT |
125 | static int pcmda12_attach(struct comedi_device *dev, |
126 | struct comedi_devconfig *it) | |
647d8b45 | 127 | { |
9a1a6cf8 | 128 | struct pcmda12_private *devpriv; |
34c43922 | 129 | struct comedi_subdevice *s; |
8b6c5694 | 130 | int ret; |
647d8b45 | 131 | |
7af94fe3 | 132 | ret = comedi_request_region(dev, it->options[0], 0x10); |
7b650090 HS |
133 | if (ret) |
134 | return ret; | |
647d8b45 | 135 | |
0bdab509 | 136 | devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); |
c34fa261 HS |
137 | if (!devpriv) |
138 | return -ENOMEM; | |
647d8b45 CC |
139 | |
140 | devpriv->simultaneous_xfer_mode = it->options[1]; | |
141 | ||
8b6c5694 HS |
142 | ret = comedi_alloc_subdevices(dev, 1); |
143 | if (ret) | |
144 | return ret; | |
647d8b45 | 145 | |
623733ff | 146 | s = &dev->subdevices[0]; |
4b2ebd8d HS |
147 | s->type = COMEDI_SUBD_AO; |
148 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; | |
ef7654c0 | 149 | s->n_chan = 8; |
4b2ebd8d HS |
150 | s->maxdata = 0x0fff; |
151 | s->range_table = &pcmda12_ranges; | |
b11c5d3c HS |
152 | s->insn_write = pcmda12_ao_insn_write; |
153 | s->insn_read = pcmda12_ao_insn_read; | |
647d8b45 | 154 | |
bf90bbd6 HS |
155 | ret = comedi_alloc_subdev_readback(s); |
156 | if (ret) | |
157 | return ret; | |
158 | ||
ef7654c0 | 159 | pcmda12_ao_reset(dev, s); |
647d8b45 | 160 | |
17164504 | 161 | return 0; |
647d8b45 CC |
162 | } |
163 | ||
294f930d | 164 | static struct comedi_driver pcmda12_driver = { |
924f4685 HS |
165 | .driver_name = "pcmda12", |
166 | .module = THIS_MODULE, | |
167 | .attach = pcmda12_attach, | |
21208519 | 168 | .detach = comedi_legacy_detach, |
924f4685 | 169 | }; |
294f930d | 170 | module_comedi_driver(pcmda12_driver); |
90f703d3 AT |
171 | |
172 | MODULE_AUTHOR("Comedi http://www.comedi.org"); | |
173 | MODULE_DESCRIPTION("Comedi low-level driver"); | |
174 | MODULE_LICENSE("GPL"); |