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, {
70 static const struct comedi_lrange range_dt2815_ao_20_current = { 1, {
79 #define DT2815_STATUS 1
81 static int dt2815_attach(struct comedi_device *dev,
82 struct comedi_devconfig *it);
83 static int dt2815_detach(struct comedi_device *dev);
84 static struct comedi_driver driver_dt2815 = {
85 .driver_name = "dt2815",
86 .module = THIS_MODULE,
87 .attach = dt2815_attach,
88 .detach = dt2815_detach,
91 COMEDI_INITCLEANUP(driver_dt2815);
93 static void dt2815_free_resources(struct comedi_device *dev);
95 struct dt2815_private {
97 const struct comedi_lrange *range_type_list[8];
98 unsigned int ao_readback[8];
101 #define devpriv ((struct dt2815_private *)dev->private)
103 static int dt2815_wait_for_status(struct comedi_device *dev, int status)
107 for (i = 0; i < 100; i++) {
108 if (inb(dev->iobase + DT2815_STATUS) == status)
114 static int dt2815_ao_insn_read(struct comedi_device *dev,
115 struct comedi_subdevice *s,
116 struct comedi_insn *insn, unsigned int *data)
119 int chan = CR_CHAN(insn->chanspec);
121 for (i = 0; i < insn->n; i++) {
122 data[i] = devpriv->ao_readback[chan];
128 static int dt2815_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
129 struct comedi_insn *insn, unsigned int *data)
132 int chan = CR_CHAN(insn->chanspec);
136 for (i = 0; i < insn->n; i++) {
137 lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01;
138 hi = (data[i] & 0xff0) >> 4;
140 status = dt2815_wait_for_status(dev, 0x00);
143 ("dt2815: failed to write low byte on %d reason %x\n",
148 outb(lo, dev->iobase + DT2815_DATA);
150 status = dt2815_wait_for_status(dev, 0x10);
151 if (status != 0x10) {
153 ("dt2815: failed to write high byte on %d reason %x\n",
157 devpriv->ao_readback[chan] = data[i];
163 options[0] Board base address
164 options[1] IRQ (not applicable)
165 options[2] Voltage unipolar/bipolar configuration
166 0 == unipolar 5V (0V -- +5V)
167 1 == bipolar 5V (-5V -- +5V)
168 options[3] Current offset configuration
169 0 == disabled (0mA -- +32mAV)
170 1 == enabled (+4mA -- +20mAV)
171 options[4] Firmware program configuration
172 0 == program 1 (see manual table 5-4)
173 1 == program 2 (see manual table 5-4)
174 2 == program 3 (see manual table 5-4)
175 3 == program 4 (see manual table 5-4)
176 options[5] Analog output 0 range configuration
179 options[6] Analog output 1 range configuration
181 options[12] Analog output 7 range configuration
186 static int dt2815_attach(struct comedi_device *dev, struct comedi_devconfig *it)
188 struct comedi_subdevice *s;
190 const struct comedi_lrange *current_range_type, *voltage_range_type;
191 unsigned long iobase;
193 iobase = it->options[0];
194 printk("comedi%d: dt2815: 0x%04lx ", dev->minor, iobase);
195 if (!request_region(iobase, DT2815_SIZE, "dt2815")) {
196 printk("I/O port conflict\n");
200 dev->iobase = iobase;
201 dev->board_name = "dt2815";
203 if (alloc_subdevices(dev, 1) < 0)
205 if (alloc_private(dev, sizeof(struct dt2815_private)) < 0)
210 s->type = COMEDI_SUBD_AO;
211 s->subdev_flags = SDF_WRITABLE;
214 s->insn_write = dt2815_ao_insn;
215 s->insn_read = dt2815_ao_insn_read;
216 s->range_table_list = devpriv->range_type_list;
218 current_range_type = (it->options[3])
219 ? &range_dt2815_ao_20_current : &range_dt2815_ao_32_current;
220 voltage_range_type = (it->options[2])
221 ? &range_bipolar5 : &range_unipolar5;
222 for (i = 0; i < 8; i++) {
223 devpriv->range_type_list[i] = (it->options[5 + i])
224 ? current_range_type : voltage_range_type;
228 outb(0x00, dev->iobase + DT2815_STATUS);
229 for (i = 0; i < 100; i++) {
230 /* This is incredibly slow (approx 20 ms) */
234 status = inb(dev->iobase + DT2815_STATUS);
236 unsigned int program;
237 program = (it->options[4] & 0x3) << 3 | 0x7;
238 outb(program, dev->iobase + DT2815_DATA);
239 printk(", program: 0x%x (@t=%d)\n", program, i);
241 } else if (status != 0x00) {
242 printk("dt2815: unexpected status 0x%x (@t=%d)\n",
245 outb(0x00, dev->iobase + DT2815_STATUS);
255 static void dt2815_free_resources(struct comedi_device *dev)
258 release_region(dev->iobase, DT2815_SIZE);
261 static int dt2815_detach(struct comedi_device *dev)
263 printk("comedi%d: dt2815: remove\n", dev->minor);
265 dt2815_free_resources(dev);