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 struct boarddef_struct {
47 int (*setup) (struct comedi_device *);
51 int (*winsn) (struct comedi_device *, struct comedi_subdevice *,
52 struct comedi_insn *, unsigned int *);
53 int (*rinsn) (struct comedi_device *, struct comedi_subdevice *,
54 struct comedi_insn *, unsigned int *);
55 int (*insnbits) (struct comedi_device *, struct comedi_subdevice *,
56 struct comedi_insn *, unsigned int *);
57 const struct comedi_lrange *range;
60 static int readback_insn(struct comedi_device *dev, struct comedi_subdevice *s,
61 struct comedi_insn *insn, unsigned int *data)
65 chan = CR_CHAN(insn->chanspec);
66 data[0] = ((unsigned int *)dev->private)[chan];
71 /* DAC-02 registers */
72 #define DAC02_LSB(a) (2 * a)
73 #define DAC02_MSB(a) (2 * a + 1)
75 static int dac02_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
76 struct comedi_insn *insn, unsigned int *data)
82 chan = CR_CHAN(insn->chanspec);
83 ((unsigned int *)dev->private)[chan] = data[0];
86 /* convert to complementary binary if range is bipolar */
87 if ((CR_RANGE(insn->chanspec) & 0x2) == 0)
90 temp = (output << 4) & 0xf0;
91 outb(temp, dev->iobase + DAC02_LSB(chan));
92 temp = (output >> 4) & 0xff;
93 outb(temp, dev->iobase + DAC02_MSB(chan));
98 static int pcl733_insn_bits(struct comedi_device *dev,
99 struct comedi_subdevice *s,
100 struct comedi_insn *insn, unsigned int *data)
102 data[1] = inb(dev->iobase + 0);
103 data[1] |= (inb(dev->iobase + 1) << 8);
104 data[1] |= (inb(dev->iobase + 2) << 16);
105 data[1] |= (inb(dev->iobase + 3) << 24);
110 static int pcl734_insn_bits(struct comedi_device *dev,
111 struct comedi_subdevice *s,
112 struct comedi_insn *insn, unsigned int *data)
115 s->state &= ~data[0];
116 s->state |= (data[0] & data[1]);
117 if ((data[0] >> 0) & 0xff)
118 outb((s->state >> 0) & 0xff, dev->iobase + 0);
119 if ((data[0] >> 8) & 0xff)
120 outb((s->state >> 8) & 0xff, dev->iobase + 1);
121 if ((data[0] >> 16) & 0xff)
122 outb((s->state >> 16) & 0xff, dev->iobase + 2);
123 if ((data[0] >> 24) & 0xff)
124 outb((s->state >> 24) & 0xff, dev->iobase + 3);
131 static int poc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
133 const struct boarddef_struct *board = comedi_board(dev);
134 struct comedi_subdevice *s;
135 unsigned long iobase;
139 iobase = it->options[0];
140 printk(KERN_INFO "comedi%d: poc: using %s iobase 0x%lx\n", dev->minor,
141 board->name, iobase);
143 dev->board_name = board->name;
146 printk(KERN_ERR "io base address required\n");
150 iosize = board->iosize;
151 /* check if io addresses are available */
152 if (!request_region(iobase, iosize, "dac02")) {
153 printk(KERN_ERR "I/O port conflict: failed to allocate ports "
154 "0x%lx to 0x%lx\n", iobase, iobase + iosize - 1);
157 dev->iobase = iobase;
159 ret = comedi_alloc_subdevices(dev, 1);
163 if (alloc_private(dev, sizeof(unsigned int) * board->n_chan) < 0)
166 /* analog output subdevice */
167 s = dev->subdevices + 0;
168 s->type = board->type;
169 s->n_chan = board->n_chan;
170 s->maxdata = (1 << board->n_bits) - 1;
171 s->range_table = board->range;
172 s->insn_write = board->winsn;
173 s->insn_read = board->rinsn;
174 s->insn_bits = board->insnbits;
175 if (s->type == COMEDI_SUBD_AO || s->type == COMEDI_SUBD_DO)
176 s->subdev_flags = SDF_WRITABLE;
181 static void poc_detach(struct comedi_device *dev)
183 const struct boarddef_struct *board = comedi_board(dev);
186 release_region(dev->iobase, board->iosize);
189 static const struct boarddef_struct boards[] = {
193 /* .setup = dac02_setup, */
194 .type = COMEDI_SUBD_AO,
197 .winsn = dac02_ao_winsn,
198 .rinsn = readback_insn,
199 .range = &range_unknown,
203 .type = COMEDI_SUBD_DI,
206 .insnbits = pcl733_insn_bits,
207 .range = &range_digital,
211 .type = COMEDI_SUBD_DO,
214 .insnbits = pcl734_insn_bits,
215 .range = &range_digital,
219 static struct comedi_driver poc_driver = {
220 .driver_name = "poc",
221 .module = THIS_MODULE,
222 .attach = poc_attach,
223 .detach = poc_detach,
224 .board_name = &boards[0].name,
225 .num_names = ARRAY_SIZE(boards),
226 .offset = sizeof(boards[0]),
228 module_comedi_driver(poc_driver);
230 MODULE_AUTHOR("Comedi http://www.comedi.org");
231 MODULE_DESCRIPTION("Comedi low-level driver");
232 MODULE_LICENSE("GPL");