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>
64 static const struct comedi_lrange
65 range_dt2815_ao_32_current = {1, {RANGE_mA(0, 32)} };
67 static const struct comedi_lrange
68 range_dt2815_ao_20_current = {1, {RANGE_mA(4, 20)} };
73 #define DT2815_STATUS 1
75 struct dt2815_private {
77 const struct comedi_lrange *range_type_list[8];
78 unsigned int ao_readback[8];
81 #define devpriv ((struct dt2815_private *)dev->private)
83 static int dt2815_wait_for_status(struct comedi_device *dev, int status)
87 for (i = 0; i < 100; i++) {
88 if (inb(dev->iobase + DT2815_STATUS) == status)
94 static int dt2815_ao_insn_read(struct comedi_device *dev,
95 struct comedi_subdevice *s,
96 struct comedi_insn *insn, unsigned int *data)
99 int chan = CR_CHAN(insn->chanspec);
101 for (i = 0; i < insn->n; i++)
102 data[i] = devpriv->ao_readback[chan];
107 static int dt2815_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
108 struct comedi_insn *insn, unsigned int *data)
111 int chan = CR_CHAN(insn->chanspec);
115 for (i = 0; i < insn->n; i++) {
116 lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01;
117 hi = (data[i] & 0xff0) >> 4;
119 status = dt2815_wait_for_status(dev, 0x00);
121 printk(KERN_WARNING "dt2815: failed to write low byte "
122 "on %d reason %x\n", chan, status);
126 outb(lo, dev->iobase + DT2815_DATA);
128 status = dt2815_wait_for_status(dev, 0x10);
129 if (status != 0x10) {
130 printk(KERN_WARNING "dt2815: failed to write high byte "
131 "on %d reason %x\n", chan, status);
134 devpriv->ao_readback[chan] = data[i];
140 options[0] Board base address
141 options[1] IRQ (not applicable)
142 options[2] Voltage unipolar/bipolar configuration
143 0 == unipolar 5V (0V -- +5V)
144 1 == bipolar 5V (-5V -- +5V)
145 options[3] Current offset configuration
146 0 == disabled (0mA -- +32mAV)
147 1 == enabled (+4mA -- +20mAV)
148 options[4] Firmware program configuration
149 0 == program 1 (see manual table 5-4)
150 1 == program 2 (see manual table 5-4)
151 2 == program 3 (see manual table 5-4)
152 3 == program 4 (see manual table 5-4)
153 options[5] Analog output 0 range configuration
156 options[6] Analog output 1 range configuration
158 options[12] Analog output 7 range configuration
163 static int dt2815_attach(struct comedi_device *dev, struct comedi_devconfig *it)
165 struct comedi_subdevice *s;
167 const struct comedi_lrange *current_range_type, *voltage_range_type;
168 unsigned long iobase;
171 iobase = it->options[0];
172 printk(KERN_INFO "comedi%d: dt2815: 0x%04lx ", dev->minor, iobase);
173 if (!request_region(iobase, DT2815_SIZE, "dt2815")) {
174 printk(KERN_WARNING "I/O port conflict\n");
178 dev->iobase = iobase;
179 dev->board_name = "dt2815";
181 ret = comedi_alloc_subdevices(dev, 1);
185 if (alloc_private(dev, sizeof(struct dt2815_private)) < 0)
190 s->type = COMEDI_SUBD_AO;
191 s->subdev_flags = SDF_WRITABLE;
194 s->insn_write = dt2815_ao_insn;
195 s->insn_read = dt2815_ao_insn_read;
196 s->range_table_list = devpriv->range_type_list;
198 current_range_type = (it->options[3])
199 ? &range_dt2815_ao_20_current : &range_dt2815_ao_32_current;
200 voltage_range_type = (it->options[2])
201 ? &range_bipolar5 : &range_unipolar5;
202 for (i = 0; i < 8; i++) {
203 devpriv->range_type_list[i] = (it->options[5 + i])
204 ? current_range_type : voltage_range_type;
208 outb(0x00, dev->iobase + DT2815_STATUS);
209 for (i = 0; i < 100; i++) {
210 /* This is incredibly slow (approx 20 ms) */
214 status = inb(dev->iobase + DT2815_STATUS);
216 unsigned int program;
217 program = (it->options[4] & 0x3) << 3 | 0x7;
218 outb(program, dev->iobase + DT2815_DATA);
219 printk(KERN_INFO ", program: 0x%x (@t=%d)\n",
222 } else if (status != 0x00) {
223 printk(KERN_WARNING "dt2815: unexpected status 0x%x "
224 "(@t=%d)\n", status, i);
226 outb(0x00, dev->iobase + DT2815_STATUS);
233 static void dt2815_detach(struct comedi_device *dev)
236 release_region(dev->iobase, DT2815_SIZE);
239 static struct comedi_driver dt2815_driver = {
240 .driver_name = "dt2815",
241 .module = THIS_MODULE,
242 .attach = dt2815_attach,
243 .detach = dt2815_detach,
245 module_comedi_driver(dt2815_driver);
247 MODULE_AUTHOR("Comedi http://www.comedi.org");
248 MODULE_DESCRIPTION("Comedi low-level driver");
249 MODULE_LICENSE("GPL");