2 comedi/drivers/dt2815.c
3 Hardware driver for Data Translation DT2815
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>
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.
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.
20 Description: Data Translation DT2815
22 Status: mostly complete, untested
23 Devices: [Data Translation] DT2815 (dt2815)
25 I'm not sure anyone has ever tested this board. If you have information
26 contrary, please update.
28 Configuration options:
29 [0] - I/O port base base address
31 [2] - Voltage unipolar/bipolar configuration
32 0 == unipolar 5V (0V -- +5V)
33 1 == bipolar 5V (-5V -- +5V)
34 [3] - Current offset configuration
35 0 == disabled (0mA -- +32mAV)
36 1 == enabled (+4mA -- +20mAV)
37 [4] - Firmware program configuration
38 0 == program 1 (see manual table 5-4)
39 1 == program 2 (see manual table 5-4)
40 2 == program 3 (see manual table 5-4)
41 3 == program 4 (see manual table 5-4)
42 [5] - Analog output 0 range configuration
45 [6] - Analog output 1 range configuration (same options)
46 [7] - Analog output 2 range configuration (same options)
47 [8] - Analog output 3 range configuration (same options)
48 [9] - Analog output 4 range configuration (same options)
49 [10] - Analog output 5 range configuration (same options)
50 [11] - Analog output 6 range configuration (same options)
51 [12] - Analog output 7 range configuration (same options)
54 #include <linux/module.h>
55 #include "../comedidev.h"
57 #include <linux/delay.h>
62 #define DT2815_STATUS 1
64 struct dt2815_private {
66 const struct comedi_lrange *range_type_list[8];
67 unsigned int ao_readback[8];
70 static int dt2815_wait_for_status(struct comedi_device *dev, int status)
74 for (i = 0; i < 100; i++) {
75 if (inb(dev->iobase + DT2815_STATUS) == status)
81 static int dt2815_ao_insn_read(struct comedi_device *dev,
82 struct comedi_subdevice *s,
83 struct comedi_insn *insn, unsigned int *data)
85 struct dt2815_private *devpriv = dev->private;
87 int chan = CR_CHAN(insn->chanspec);
89 for (i = 0; i < insn->n; i++)
90 data[i] = devpriv->ao_readback[chan];
95 static int dt2815_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
96 struct comedi_insn *insn, unsigned int *data)
98 struct dt2815_private *devpriv = dev->private;
100 int chan = CR_CHAN(insn->chanspec);
104 for (i = 0; i < insn->n; i++) {
105 lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01;
106 hi = (data[i] & 0xff0) >> 4;
108 status = dt2815_wait_for_status(dev, 0x00);
110 printk(KERN_WARNING "dt2815: failed to write low byte "
111 "on %d reason %x\n", chan, status);
115 outb(lo, dev->iobase + DT2815_DATA);
117 status = dt2815_wait_for_status(dev, 0x10);
118 if (status != 0x10) {
119 printk(KERN_WARNING "dt2815: failed to write high byte "
120 "on %d reason %x\n", chan, status);
123 devpriv->ao_readback[chan] = data[i];
129 options[0] Board base address
130 options[1] IRQ (not applicable)
131 options[2] Voltage unipolar/bipolar configuration
132 0 == unipolar 5V (0V -- +5V)
133 1 == bipolar 5V (-5V -- +5V)
134 options[3] Current offset configuration
135 0 == disabled (0mA -- +32mAV)
136 1 == enabled (+4mA -- +20mAV)
137 options[4] Firmware program configuration
138 0 == program 1 (see manual table 5-4)
139 1 == program 2 (see manual table 5-4)
140 2 == program 3 (see manual table 5-4)
141 3 == program 4 (see manual table 5-4)
142 options[5] Analog output 0 range configuration
145 options[6] Analog output 1 range configuration
147 options[12] Analog output 7 range configuration
152 static int dt2815_attach(struct comedi_device *dev, struct comedi_devconfig *it)
154 struct dt2815_private *devpriv;
155 struct comedi_subdevice *s;
157 const struct comedi_lrange *current_range_type, *voltage_range_type;
160 ret = comedi_request_region(dev, it->options[0], DT2815_SIZE);
164 ret = comedi_alloc_subdevices(dev, 1);
168 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
172 s = &dev->subdevices[0];
174 s->type = COMEDI_SUBD_AO;
175 s->subdev_flags = SDF_WRITABLE;
178 s->insn_write = dt2815_ao_insn;
179 s->insn_read = dt2815_ao_insn_read;
180 s->range_table_list = devpriv->range_type_list;
182 current_range_type = (it->options[3])
183 ? &range_4_20mA : &range_0_32mA;
184 voltage_range_type = (it->options[2])
185 ? &range_bipolar5 : &range_unipolar5;
186 for (i = 0; i < 8; i++) {
187 devpriv->range_type_list[i] = (it->options[5 + i])
188 ? current_range_type : voltage_range_type;
192 outb(0x00, dev->iobase + DT2815_STATUS);
193 for (i = 0; i < 100; i++) {
194 /* This is incredibly slow (approx 20 ms) */
198 status = inb(dev->iobase + DT2815_STATUS);
200 unsigned int program;
201 program = (it->options[4] & 0x3) << 3 | 0x7;
202 outb(program, dev->iobase + DT2815_DATA);
203 printk(KERN_INFO ", program: 0x%x (@t=%d)\n",
206 } else if (status != 0x00) {
207 printk(KERN_WARNING "dt2815: unexpected status 0x%x "
208 "(@t=%d)\n", status, i);
210 outb(0x00, dev->iobase + DT2815_STATUS);
217 static struct comedi_driver dt2815_driver = {
218 .driver_name = "dt2815",
219 .module = THIS_MODULE,
220 .attach = dt2815_attach,
221 .detach = comedi_legacy_detach,
223 module_comedi_driver(dt2815_driver);
225 MODULE_AUTHOR("Comedi http://www.comedi.org");
226 MODULE_DESCRIPTION("Comedi low-level driver");
227 MODULE_LICENSE("GPL");