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 range_dt2815_ao_32_current = { 1, {
68 static const struct comedi_lrange range_dt2815_ao_20_current = { 1, {
76 #define DT2815_STATUS 1
78 static int dt2815_attach(struct comedi_device * dev, struct comedi_devconfig * it);
79 static int dt2815_detach(struct comedi_device * dev);
80 static struct comedi_driver driver_dt2815 = {
87 COMEDI_INITCLEANUP(driver_dt2815);
89 static void dt2815_free_resources(struct comedi_device * dev);
92 const struct comedi_lrange *range_type_list[8];
93 unsigned int ao_readback[8];
96 #define devpriv ((dt2815_private *)dev->private)
98 static int dt2815_wait_for_status(struct comedi_device * dev, int status)
102 for (i = 0; i < 100; i++) {
103 if (inb(dev->iobase + DT2815_STATUS) == status)
109 static int dt2815_ao_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
110 struct comedi_insn * insn, unsigned int * data)
113 int chan = CR_CHAN(insn->chanspec);
115 for (i = 0; i < insn->n; i++) {
116 data[i] = devpriv->ao_readback[chan];
122 static int dt2815_ao_insn(struct comedi_device * dev, struct comedi_subdevice * s,
123 struct comedi_insn * insn, unsigned int * data)
126 int chan = CR_CHAN(insn->chanspec);
130 for (i = 0; i < insn->n; i++) {
131 lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01;
132 hi = (data[i] & 0xff0) >> 4;
134 status = dt2815_wait_for_status(dev, 0x00);
137 ("dt2815: failed to write low byte on %d reason %x\n",
142 outb(lo, dev->iobase + DT2815_DATA);
144 status = dt2815_wait_for_status(dev, 0x10);
145 if (status != 0x10) {
147 ("dt2815: failed to write high byte on %d reason %x\n",
151 devpriv->ao_readback[chan] = data[i];
157 options[0] Board base address
158 options[1] IRQ (not applicable)
159 options[2] Voltage unipolar/bipolar configuration
160 0 == unipolar 5V (0V -- +5V)
161 1 == bipolar 5V (-5V -- +5V)
162 options[3] Current offset configuration
163 0 == disabled (0mA -- +32mAV)
164 1 == enabled (+4mA -- +20mAV)
165 options[4] Firmware program configuration
166 0 == program 1 (see manual table 5-4)
167 1 == program 2 (see manual table 5-4)
168 2 == program 3 (see manual table 5-4)
169 3 == program 4 (see manual table 5-4)
170 options[5] Analog output 0 range configuration
173 options[6] Analog output 1 range configuration
175 options[12] Analog output 7 range configuration
180 static int dt2815_attach(struct comedi_device * dev, struct comedi_devconfig * it)
182 struct comedi_subdevice *s;
184 const struct comedi_lrange *current_range_type, *voltage_range_type;
185 unsigned long iobase;
187 iobase = it->options[0];
188 printk("comedi%d: dt2815: 0x%04lx ", dev->minor, iobase);
189 if (!request_region(iobase, DT2815_SIZE, "dt2815")) {
190 printk("I/O port conflict\n");
194 dev->iobase = iobase;
195 dev->board_name = "dt2815";
197 if (alloc_subdevices(dev, 1) < 0)
199 if (alloc_private(dev, sizeof(dt2815_private)) < 0)
204 s->type = COMEDI_SUBD_AO;
205 s->subdev_flags = SDF_WRITABLE;
208 s->insn_write = dt2815_ao_insn;
209 s->insn_read = dt2815_ao_insn_read;
210 s->range_table_list = devpriv->range_type_list;
212 current_range_type = (it->options[3])
213 ? &range_dt2815_ao_20_current : &range_dt2815_ao_32_current;
214 voltage_range_type = (it->options[2])
215 ? &range_bipolar5 : &range_unipolar5;
216 for (i = 0; i < 8; i++) {
217 devpriv->range_type_list[i] = (it->options[5 + i])
218 ? current_range_type : voltage_range_type;
222 outb(0x00, dev->iobase + DT2815_STATUS);
223 for (i = 0; i < 100; i++) {
224 /* This is incredibly slow (approx 20 ms) */
228 status = inb(dev->iobase + DT2815_STATUS);
230 unsigned int program;
231 program = (it->options[4] & 0x3) << 3 | 0x7;
232 outb(program, dev->iobase + DT2815_DATA);
233 printk(", program: 0x%x (@t=%d)\n", program, i);
235 } else if (status != 0x00) {
236 printk("dt2815: unexpected status 0x%x (@t=%d)\n",
239 outb(0x00, dev->iobase + DT2815_STATUS);
249 static void dt2815_free_resources(struct comedi_device * dev)
252 release_region(dev->iobase, DT2815_SIZE);
255 static int dt2815_detach(struct comedi_device * dev)
257 printk("comedi%d: dt2815: remove\n", dev->minor);
259 dt2815_free_resources(dev);