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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 Description: Data Translation DT2815
27 Status: mostly complete, untested
28 Devices: [Data Translation] DT2815 (dt2815)
30 I'm not sure anyone has ever tested this board. If you have information
31 contrary, please update.
33 Configuration options:
34 [0] - I/O port base base address
36 [2] - Voltage unipolar/bipolar configuration
37 0 == unipolar 5V (0V -- +5V)
38 1 == bipolar 5V (-5V -- +5V)
39 [3] - Current offset configuration
40 0 == disabled (0mA -- +32mAV)
41 1 == enabled (+4mA -- +20mAV)
42 [4] - Firmware program configuration
43 0 == program 1 (see manual table 5-4)
44 1 == program 2 (see manual table 5-4)
45 2 == program 3 (see manual table 5-4)
46 3 == program 4 (see manual table 5-4)
47 [5] - Analog output 0 range configuration
50 [6] - Analog output 1 range configuration (same options)
51 [7] - Analog output 2 range configuration (same options)
52 [8] - Analog output 3 range configuration (same options)
53 [9] - Analog output 4 range configuration (same options)
54 [10] - Analog output 5 range configuration (same options)
55 [11] - Analog output 6 range configuration (same options)
56 [12] - Analog output 7 range configuration (same options)
59 #include "../comedidev.h"
61 #include <linux/ioport.h>
62 #include <linux/delay.h>
67 #define DT2815_STATUS 1
69 struct dt2815_private {
71 const struct comedi_lrange *range_type_list[8];
72 unsigned int ao_readback[8];
75 static int dt2815_wait_for_status(struct comedi_device *dev, int status)
79 for (i = 0; i < 100; i++) {
80 if (inb(dev->iobase + DT2815_STATUS) == status)
86 static int dt2815_ao_insn_read(struct comedi_device *dev,
87 struct comedi_subdevice *s,
88 struct comedi_insn *insn, unsigned int *data)
90 struct dt2815_private *devpriv = dev->private;
92 int chan = CR_CHAN(insn->chanspec);
94 for (i = 0; i < insn->n; i++)
95 data[i] = devpriv->ao_readback[chan];
100 static int dt2815_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
101 struct comedi_insn *insn, unsigned int *data)
103 struct dt2815_private *devpriv = dev->private;
105 int chan = CR_CHAN(insn->chanspec);
109 for (i = 0; i < insn->n; i++) {
110 lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01;
111 hi = (data[i] & 0xff0) >> 4;
113 status = dt2815_wait_for_status(dev, 0x00);
115 printk(KERN_WARNING "dt2815: failed to write low byte "
116 "on %d reason %x\n", chan, status);
120 outb(lo, dev->iobase + DT2815_DATA);
122 status = dt2815_wait_for_status(dev, 0x10);
123 if (status != 0x10) {
124 printk(KERN_WARNING "dt2815: failed to write high byte "
125 "on %d reason %x\n", chan, status);
128 devpriv->ao_readback[chan] = data[i];
134 options[0] Board base address
135 options[1] IRQ (not applicable)
136 options[2] Voltage unipolar/bipolar configuration
137 0 == unipolar 5V (0V -- +5V)
138 1 == bipolar 5V (-5V -- +5V)
139 options[3] Current offset configuration
140 0 == disabled (0mA -- +32mAV)
141 1 == enabled (+4mA -- +20mAV)
142 options[4] Firmware program configuration
143 0 == program 1 (see manual table 5-4)
144 1 == program 2 (see manual table 5-4)
145 2 == program 3 (see manual table 5-4)
146 3 == program 4 (see manual table 5-4)
147 options[5] Analog output 0 range configuration
150 options[6] Analog output 1 range configuration
152 options[12] Analog output 7 range configuration
157 static int dt2815_attach(struct comedi_device *dev, struct comedi_devconfig *it)
159 struct dt2815_private *devpriv;
160 struct comedi_subdevice *s;
162 const struct comedi_lrange *current_range_type, *voltage_range_type;
165 ret = comedi_request_region(dev, it->options[0], DT2815_SIZE);
169 ret = comedi_alloc_subdevices(dev, 1);
173 devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
176 dev->private = devpriv;
178 s = &dev->subdevices[0];
180 s->type = COMEDI_SUBD_AO;
181 s->subdev_flags = SDF_WRITABLE;
184 s->insn_write = dt2815_ao_insn;
185 s->insn_read = dt2815_ao_insn_read;
186 s->range_table_list = devpriv->range_type_list;
188 current_range_type = (it->options[3])
189 ? &range_4_20mA : &range_0_32mA;
190 voltage_range_type = (it->options[2])
191 ? &range_bipolar5 : &range_unipolar5;
192 for (i = 0; i < 8; i++) {
193 devpriv->range_type_list[i] = (it->options[5 + i])
194 ? current_range_type : voltage_range_type;
198 outb(0x00, dev->iobase + DT2815_STATUS);
199 for (i = 0; i < 100; i++) {
200 /* This is incredibly slow (approx 20 ms) */
204 status = inb(dev->iobase + DT2815_STATUS);
206 unsigned int program;
207 program = (it->options[4] & 0x3) << 3 | 0x7;
208 outb(program, dev->iobase + DT2815_DATA);
209 printk(KERN_INFO ", program: 0x%x (@t=%d)\n",
212 } else if (status != 0x00) {
213 printk(KERN_WARNING "dt2815: unexpected status 0x%x "
214 "(@t=%d)\n", status, i);
216 outb(0x00, dev->iobase + DT2815_STATUS);
223 static struct comedi_driver dt2815_driver = {
224 .driver_name = "dt2815",
225 .module = THIS_MODULE,
226 .attach = dt2815_attach,
227 .detach = comedi_legacy_detach,
229 module_comedi_driver(dt2815_driver);
231 MODULE_AUTHOR("Comedi http://www.comedi.org");
232 MODULE_DESCRIPTION("Comedi low-level driver");
233 MODULE_LICENSE("GPL");