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);
91 struct dt2815_private {
93 const struct comedi_lrange *range_type_list[8];
94 unsigned int ao_readback[8];
98 #define devpriv ((struct dt2815_private *)dev->private)
100 static int dt2815_wait_for_status(struct comedi_device * dev, int status)
104 for (i = 0; i < 100; i++) {
105 if (inb(dev->iobase + DT2815_STATUS) == status)
111 static int dt2815_ao_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
112 struct comedi_insn * insn, unsigned int * data)
115 int chan = CR_CHAN(insn->chanspec);
117 for (i = 0; i < insn->n; i++) {
118 data[i] = devpriv->ao_readback[chan];
124 static int dt2815_ao_insn(struct comedi_device * dev, struct comedi_subdevice * s,
125 struct comedi_insn * insn, unsigned int * data)
128 int chan = CR_CHAN(insn->chanspec);
132 for (i = 0; i < insn->n; i++) {
133 lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01;
134 hi = (data[i] & 0xff0) >> 4;
136 status = dt2815_wait_for_status(dev, 0x00);
139 ("dt2815: failed to write low byte on %d reason %x\n",
144 outb(lo, dev->iobase + DT2815_DATA);
146 status = dt2815_wait_for_status(dev, 0x10);
147 if (status != 0x10) {
149 ("dt2815: failed to write high byte on %d reason %x\n",
153 devpriv->ao_readback[chan] = data[i];
159 options[0] Board base address
160 options[1] IRQ (not applicable)
161 options[2] Voltage unipolar/bipolar configuration
162 0 == unipolar 5V (0V -- +5V)
163 1 == bipolar 5V (-5V -- +5V)
164 options[3] Current offset configuration
165 0 == disabled (0mA -- +32mAV)
166 1 == enabled (+4mA -- +20mAV)
167 options[4] Firmware program configuration
168 0 == program 1 (see manual table 5-4)
169 1 == program 2 (see manual table 5-4)
170 2 == program 3 (see manual table 5-4)
171 3 == program 4 (see manual table 5-4)
172 options[5] Analog output 0 range configuration
175 options[6] Analog output 1 range configuration
177 options[12] Analog output 7 range configuration
182 static int dt2815_attach(struct comedi_device * dev, struct comedi_devconfig * it)
184 struct comedi_subdevice *s;
186 const struct comedi_lrange *current_range_type, *voltage_range_type;
187 unsigned long iobase;
189 iobase = it->options[0];
190 printk("comedi%d: dt2815: 0x%04lx ", dev->minor, iobase);
191 if (!request_region(iobase, DT2815_SIZE, "dt2815")) {
192 printk("I/O port conflict\n");
196 dev->iobase = iobase;
197 dev->board_name = "dt2815";
199 if (alloc_subdevices(dev, 1) < 0)
201 if (alloc_private(dev, sizeof(struct dt2815_private)) < 0)
206 s->type = COMEDI_SUBD_AO;
207 s->subdev_flags = SDF_WRITABLE;
210 s->insn_write = dt2815_ao_insn;
211 s->insn_read = dt2815_ao_insn_read;
212 s->range_table_list = devpriv->range_type_list;
214 current_range_type = (it->options[3])
215 ? &range_dt2815_ao_20_current : &range_dt2815_ao_32_current;
216 voltage_range_type = (it->options[2])
217 ? &range_bipolar5 : &range_unipolar5;
218 for (i = 0; i < 8; i++) {
219 devpriv->range_type_list[i] = (it->options[5 + i])
220 ? current_range_type : voltage_range_type;
224 outb(0x00, dev->iobase + DT2815_STATUS);
225 for (i = 0; i < 100; i++) {
226 /* This is incredibly slow (approx 20 ms) */
230 status = inb(dev->iobase + DT2815_STATUS);
232 unsigned int program;
233 program = (it->options[4] & 0x3) << 3 | 0x7;
234 outb(program, dev->iobase + DT2815_DATA);
235 printk(", program: 0x%x (@t=%d)\n", program, i);
237 } else if (status != 0x00) {
238 printk("dt2815: unexpected status 0x%x (@t=%d)\n",
241 outb(0x00, dev->iobase + DT2815_STATUS);
251 static void dt2815_free_resources(struct comedi_device * dev)
254 release_region(dev->iobase, DT2815_SIZE);
257 static int dt2815_detach(struct comedi_device * dev)
259 printk("comedi%d: dt2815: remove\n", dev->minor);
261 dt2815_free_resources(dev);