3 Mini-drivers for POC (Piece of Crap) boards
4 Copyright (C) 2000 Frank Mori Hess <fmhess@uiuc.edu>
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
26 Devices: [Keithley Metrabyte] DAC-02 (dac02), [Advantech] PCL-733 (pcl733),
28 Updated: Sat, 16 Mar 2002 17:34:48 -0800
31 This driver is indended to support very simple ISA-based devices,
33 dac02 - Keithley DAC-02 analog output board
34 pcl733 - Advantech PCL-733
35 pcl734 - Advantech PCL-734
37 Configuration options:
41 #include <linux/comedidev.h>
43 #include <linux/ioport.h>
45 static int poc_attach(comedi_device *dev,comedi_devconfig *it);
46 static int poc_detach(comedi_device *dev);
47 static int readback_insn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
49 static int dac02_ao_winsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
50 static int pcl733_insn_bits(comedi_device *dev,comedi_subdevice *s,
51 comedi_insn *insn,lsampl_t *data);
52 static int pcl734_insn_bits(comedi_device *dev,comedi_subdevice *s,
53 comedi_insn *insn,lsampl_t *data);
55 struct boarddef_struct{
58 int (*setup)(comedi_device *);
62 int (*winsn)(comedi_device *,comedi_subdevice *,comedi_insn *,lsampl_t *);
63 int (*rinsn)(comedi_device *,comedi_subdevice *,comedi_insn *,lsampl_t *);
64 int (*insnbits)(comedi_device *,comedi_subdevice *,comedi_insn *,lsampl_t *);
67 static struct boarddef_struct boards[]={
75 winsn: dac02_ao_winsn,
77 range: &range_unknown,
85 insnbits: pcl733_insn_bits,
86 range: &range_digital,
94 insnbits: pcl734_insn_bits,
95 range: &range_digital,
98 #define n_boards (sizeof(boards)/sizeof(boards[0]))
99 #define this_board ((struct boarddef_struct *)dev->board_ptr)
101 static comedi_driver driver_poc=
109 offset: sizeof(boards[0]),
112 static int poc_attach(comedi_device *dev, comedi_devconfig *it)
117 iobase = it->options[0];
118 printk("comedi%d: poc: using %s iobase 0x%x\n", dev->minor,
119 this_board->name, iobase);
121 dev->board_name = this_board->name;
125 printk("io base address required\n");
129 iosize = this_board->iosize;
130 /* check if io addresses are available */
131 if(check_region(iobase, iosize) < 0)
133 printk("I/O port conflict: failed to allocate ports 0x%x to 0x%x\n",
134 iobase, iobase + iosize - 1);
137 request_region(iobase, iosize, "dac02");
138 dev->iobase = iobase;
140 dev->n_subdevices = 1;
141 if(alloc_subdevices(dev) < 0)
143 if(alloc_private(dev,sizeof(lsampl_t)*this_board->n_chan) < 0)
146 /* analog output subdevice */
147 s=dev->subdevices + 0;
148 s->type = this_board->type;
149 s->n_chan = this_board->n_chan;
150 s->maxdata = (1<<this_board->n_bits)-1;
151 s->range_table = this_board->range;
152 s->insn_write = this_board->winsn;
153 s->insn_read = this_board->rinsn;
154 s->insn_bits = this_board->insnbits;
155 if(s->type==COMEDI_SUBD_AO || s->type==COMEDI_SUBD_DO){
156 s->subdev_flags = SDF_WRITABLE;
162 static int poc_detach(comedi_device *dev)
164 /* only free stuff if it has been allocated by _attach */
166 release_region(dev->iobase, this_board->iosize);
168 printk("comedi%d: dac02: remove\n", dev->minor);
173 static int readback_insn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
177 chan = CR_CHAN(insn->chanspec);
178 data[0]=((lsampl_t *)dev->private)[chan];
183 /* DAC-02 registers */
184 #define DAC02_LSB(a) (2 * a)
185 #define DAC02_MSB(a) (2 * a + 1)
187 static int dac02_ao_winsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
193 chan = CR_CHAN(insn->chanspec);
194 ((lsampl_t *)dev->private)[chan] = data[0];
197 // convert to complementary binary if range is bipolar
198 if((CR_RANGE(insn->chanspec) & 0x2) == 0)
201 temp = (output << 4) & 0xf0;
202 outb(temp, dev->iobase + DAC02_LSB(chan));
203 temp = (output >> 4) & 0xff;
204 outb(temp, dev->iobase + DAC02_MSB(chan));
209 static int pcl733_insn_bits(comedi_device *dev,comedi_subdevice *s,
210 comedi_insn *insn,lsampl_t *data)
212 if(insn->n!=2)return -EINVAL;
214 data[1] = inb(dev->iobase + 0);
215 data[1] |= (inb(dev->iobase + 1) << 8);
216 data[1] |= (inb(dev->iobase + 2) << 16);
217 data[1] |= (inb(dev->iobase + 3) << 24);
222 static int pcl734_insn_bits(comedi_device *dev,comedi_subdevice *s,
223 comedi_insn *insn,lsampl_t *data)
225 if(insn->n!=2)return -EINVAL;
227 s->state &= ~data[0];
228 s->state |= (data[0]&data[1]);
229 if((data[0]>>0)&0xff)
230 outb((s->state>>0)&0xff, dev->iobase + 0);
231 if((data[0]>>8)&0xff)
232 outb((s->state>>8)&0xff, dev->iobase + 1);
233 if((data[0]>>16)&0xff)
234 outb((s->state>>16)&0xff, dev->iobase + 2);
235 if((data[0]>>24)&0xff)
236 outb((s->state>>24)&0xff, dev->iobase + 3);
243 COMEDI_INITCLEANUP(driver_poc);