3 Mini-drivers for POC (Piece of Crap) boards
4 Copyright (C) 2000 Frank Mori Hess <fmhess@users.sourceforge.net>
5 Copyright (C) 2001 David A. Schleef <ds@schleef.org>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 Description: Generic driver for very simple devices
25 Devices: [Keithley Metrabyte] DAC-02 (dac02), [Advantech] PCL-733 (pcl733),
27 Updated: Sat, 16 Mar 2002 17:34:48 -0800
30 This driver is indended to support very simple ISA-based devices,
32 dac02 - Keithley DAC-02 analog output board
33 pcl733 - Advantech PCL-733
34 pcl734 - Advantech PCL-734
36 Configuration options:
40 #include "../comedidev.h"
42 #include <linux/ioport.h>
44 static int poc_attach(struct comedi_device *dev, struct comedi_devconfig *it);
45 static int poc_detach(struct comedi_device *dev);
46 static int readback_insn(struct comedi_device *dev, struct comedi_subdevice *s,
47 struct comedi_insn *insn, unsigned int *data);
49 static int dac02_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
50 struct comedi_insn *insn, unsigned int *data);
51 static int pcl733_insn_bits(struct comedi_device *dev,
52 struct comedi_subdevice *s,
53 struct comedi_insn *insn, unsigned int *data);
54 static int pcl734_insn_bits(struct comedi_device *dev,
55 struct comedi_subdevice *s,
56 struct comedi_insn *insn, unsigned int *data);
58 struct boarddef_struct {
61 int (*setup) (struct comedi_device *);
65 int (*winsn) (struct comedi_device *, struct comedi_subdevice *,
66 struct comedi_insn *, unsigned int *);
67 int (*rinsn) (struct comedi_device *, struct comedi_subdevice *,
68 struct comedi_insn *, unsigned int *);
69 int (*insnbits) (struct comedi_device *, struct comedi_subdevice *,
70 struct comedi_insn *, unsigned int *);
71 const struct comedi_lrange *range;
73 static const struct boarddef_struct boards[] = {
77 /* .setup = dac02_setup, */
78 .type = COMEDI_SUBD_AO,
81 .winsn = dac02_ao_winsn,
82 .rinsn = readback_insn,
83 .range = &range_unknown,
88 .type = COMEDI_SUBD_DI,
91 .insnbits = pcl733_insn_bits,
92 .range = &range_digital,
97 .type = COMEDI_SUBD_DO,
100 .insnbits = pcl734_insn_bits,
101 .range = &range_digital,
105 #define n_boards ARRAY_SIZE(boards)
106 #define this_board ((const struct boarddef_struct *)dev->board_ptr)
108 static struct comedi_driver driver_poc = {
109 .driver_name = "poc",
110 .module = THIS_MODULE,
111 .attach = poc_attach,
112 .detach = poc_detach,
113 .board_name = &boards[0].name,
114 .num_names = n_boards,
115 .offset = sizeof(boards[0]),
118 static int poc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
120 struct comedi_subdevice *s;
121 unsigned long iobase;
124 iobase = it->options[0];
125 printk("comedi%d: poc: using %s iobase 0x%lx\n", dev->minor,
126 this_board->name, iobase);
128 dev->board_name = this_board->name;
131 printk("io base address required\n");
135 iosize = this_board->iosize;
136 /* check if io addresses are available */
137 if (!request_region(iobase, iosize, "dac02")) {
139 ("I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n",
140 iobase, iobase + iosize - 1);
143 dev->iobase = iobase;
145 if (alloc_subdevices(dev, 1) < 0)
147 if (alloc_private(dev, sizeof(unsigned int) * this_board->n_chan) < 0)
150 /* analog output subdevice */
151 s = dev->subdevices + 0;
152 s->type = this_board->type;
153 s->n_chan = this_board->n_chan;
154 s->maxdata = (1 << this_board->n_bits) - 1;
155 s->range_table = this_board->range;
156 s->insn_write = this_board->winsn;
157 s->insn_read = this_board->rinsn;
158 s->insn_bits = this_board->insnbits;
159 if (s->type == COMEDI_SUBD_AO || s->type == COMEDI_SUBD_DO) {
160 s->subdev_flags = SDF_WRITABLE;
166 static int poc_detach(struct comedi_device *dev)
168 /* only free stuff if it has been allocated by _attach */
170 release_region(dev->iobase, this_board->iosize);
172 printk("comedi%d: dac02: remove\n", dev->minor);
177 static int readback_insn(struct comedi_device *dev, struct comedi_subdevice *s,
178 struct comedi_insn *insn, unsigned int *data)
182 chan = CR_CHAN(insn->chanspec);
183 data[0] = ((unsigned int *)dev->private)[chan];
188 /* DAC-02 registers */
189 #define DAC02_LSB(a) (2 * a)
190 #define DAC02_MSB(a) (2 * a + 1)
192 static int dac02_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
193 struct comedi_insn *insn, unsigned int *data)
199 chan = CR_CHAN(insn->chanspec);
200 ((unsigned int *)dev->private)[chan] = data[0];
203 /* convert to complementary binary if range is bipolar */
204 if ((CR_RANGE(insn->chanspec) & 0x2) == 0)
207 temp = (output << 4) & 0xf0;
208 outb(temp, dev->iobase + DAC02_LSB(chan));
209 temp = (output >> 4) & 0xff;
210 outb(temp, dev->iobase + DAC02_MSB(chan));
215 static int pcl733_insn_bits(struct comedi_device *dev,
216 struct comedi_subdevice *s,
217 struct comedi_insn *insn, unsigned int *data)
222 data[1] = inb(dev->iobase + 0);
223 data[1] |= (inb(dev->iobase + 1) << 8);
224 data[1] |= (inb(dev->iobase + 2) << 16);
225 data[1] |= (inb(dev->iobase + 3) << 24);
230 static int pcl734_insn_bits(struct comedi_device *dev,
231 struct comedi_subdevice *s,
232 struct comedi_insn *insn, unsigned int *data)
237 s->state &= ~data[0];
238 s->state |= (data[0] & data[1]);
239 if ((data[0] >> 0) & 0xff)
240 outb((s->state >> 0) & 0xff, dev->iobase + 0);
241 if ((data[0] >> 8) & 0xff)
242 outb((s->state >> 8) & 0xff, dev->iobase + 1);
243 if ((data[0] >> 16) & 0xff)
244 outb((s->state >> 16) & 0xff, dev->iobase + 2);
245 if ((data[0] >> 24) & 0xff)
246 outb((s->state >> 24) & 0xff, dev->iobase + 3);
253 COMEDI_INITCLEANUP(driver_poc);