2 comedi/drivers/rti802.c
3 Hardware driver for Analog Devices RTI-802 board
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: Analog Devices RTI-802
26 Author: Anders Blomdell <anders.blomdell@control.lth.se>
27 Devices: [Analog Devices] RTI-802 (rti802)
30 Configuration Options:
33 [2] - dac#0 0=two's comp, 1=straight
34 [3] - dac#0 0=bipolar, 1=unipolar
40 #include "../comedidev.h"
42 #include <linux/ioport.h>
46 #define RTI802_SELECT 0
47 #define RTI802_DATALOW 1
48 #define RTI802_DATAHIGH 2
50 static int rti802_attach(struct comedi_device * dev, struct comedi_devconfig * it);
51 static int rti802_detach(struct comedi_device * dev);
52 static struct comedi_driver driver_rti802 = {
59 COMEDI_INITCLEANUP(driver_rti802);
63 dac_2comp, dac_straight
65 const struct comedi_lrange *range_type_list[8];
66 unsigned int ao_readback[8];
69 #define devpriv ((rti802_private *)dev->private)
71 static int rti802_ao_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
72 struct comedi_insn * insn, unsigned int * data)
76 for (i = 0; i < insn->n; i++)
77 data[i] = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
82 static int rti802_ao_insn_write(struct comedi_device * dev, struct comedi_subdevice * s,
83 struct comedi_insn * insn, unsigned int * data)
86 int chan = CR_CHAN(insn->chanspec);
88 for (i = 0; i < insn->n; i++) {
89 d = devpriv->ao_readback[chan] = data[i];
90 if (devpriv->dac_coding[chan] == dac_2comp)
92 outb(chan, dev->iobase + RTI802_SELECT);
93 outb(d & 0xff, dev->iobase + RTI802_DATALOW);
94 outb(d >> 8, dev->iobase + RTI802_DATAHIGH);
99 static int rti802_attach(struct comedi_device * dev, struct comedi_devconfig * it)
101 struct comedi_subdevice *s;
103 unsigned long iobase;
105 iobase = it->options[0];
106 printk("comedi%d: rti802: 0x%04lx ", dev->minor, iobase);
107 if (!request_region(iobase, RTI802_SIZE, "rti802")) {
108 printk("I/O port conflict\n");
111 dev->iobase = iobase;
113 dev->board_name = "rti802";
115 if (alloc_subdevices(dev, 1) < 0
116 || alloc_private(dev, sizeof(rti802_private))) {
122 s->type = COMEDI_SUBD_AO;
123 s->subdev_flags = SDF_WRITABLE;
126 s->insn_read = rti802_ao_insn_read;
127 s->insn_write = rti802_ao_insn_write;
128 s->range_table_list = devpriv->range_type_list;
130 for (i = 0; i < 8; i++) {
131 devpriv->dac_coding[i] = (it->options[3 + 2 * i])
134 devpriv->range_type_list[i] = (it->options[2 + 2 * i])
135 ? &range_unipolar10 : &range_bipolar10;
143 static int rti802_detach(struct comedi_device * dev)
145 printk("comedi%d: rti802: remove\n", dev->minor);
148 release_region(dev->iobase, RTI802_SIZE);