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/kernel.h>
42 #include <linux/module.h>
43 #include <linux/sched.h>
45 #include <linux/slab.h>
46 #include <linux/errno.h>
47 #include <linux/ioport.h>
48 #include <linux/delay.h>
49 #include <linux/interrupt.h>
50 #include <linux/timex.h>
51 #include <linux/timer.h>
53 #include <linux/comedidev.h>
55 static int poc_attach(comedi_device *dev,comedi_devconfig *it);
56 static int poc_detach(comedi_device *dev);
57 static int readback_insn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
59 static int dac02_ao_winsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
60 static int pcl733_insn_bits(comedi_device *dev,comedi_subdevice *s,
61 comedi_insn *insn,lsampl_t *data);
62 static int pcl734_insn_bits(comedi_device *dev,comedi_subdevice *s,
63 comedi_insn *insn,lsampl_t *data);
65 struct boarddef_struct{
68 int (*setup)(comedi_device *);
72 int (*winsn)(comedi_device *,comedi_subdevice *,comedi_insn *,lsampl_t *);
73 int (*rinsn)(comedi_device *,comedi_subdevice *,comedi_insn *,lsampl_t *);
74 int (*insnbits)(comedi_device *,comedi_subdevice *,comedi_insn *,lsampl_t *);
77 static struct boarddef_struct boards[]={
85 winsn: dac02_ao_winsn,
87 range: &range_unknown,
95 insnbits: pcl733_insn_bits,
96 range: &range_digital,
101 type: COMEDI_SUBD_DO,
104 insnbits: pcl734_insn_bits,
105 range: &range_digital,
108 #define n_boards (sizeof(boards)/sizeof(boards[0]))
109 #define this_board ((struct boarddef_struct *)dev->board_ptr)
111 static comedi_driver driver_poc=
119 offset: sizeof(boards[0]),
122 static int poc_attach(comedi_device *dev, comedi_devconfig *it)
127 iobase = it->options[0];
128 printk("comedi%d: poc: using %s iobase 0x%x\n", dev->minor,
129 this_board->name, iobase);
131 dev->board_name = this_board->name;
135 printk("io base address required\n");
139 iosize = this_board->iosize;
140 /* check if io addresses are available */
141 if(check_region(iobase, iosize) < 0)
143 printk("I/O port conflict: failed to allocate ports 0x%x to 0x%x\n",
144 iobase, iobase + iosize - 1);
147 request_region(iobase, iosize, "dac02");
148 dev->iobase = iobase;
150 dev->n_subdevices = 1;
151 if(alloc_subdevices(dev) < 0)
153 if(alloc_private(dev,sizeof(lsampl_t)*this_board->n_chan) < 0)
156 /* analog output subdevice */
157 s=dev->subdevices + 0;
158 s->type = this_board->type;
159 s->n_chan = this_board->n_chan;
160 s->maxdata = (1<<this_board->n_bits)-1;
161 s->range_table = this_board->range;
162 s->insn_write = this_board->winsn;
163 s->insn_read = this_board->rinsn;
164 s->insn_bits = this_board->insnbits;
165 if(s->type==COMEDI_SUBD_AO || s->type==COMEDI_SUBD_DO){
166 s->subdev_flags = SDF_WRITABLE;
172 static int poc_detach(comedi_device *dev)
174 /* only free stuff if it has been allocated by _attach */
176 release_region(dev->iobase, this_board->iosize);
178 printk("comedi%d: dac02: remove\n", dev->minor);
183 static int readback_insn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
187 chan = CR_CHAN(insn->chanspec);
188 data[0]=((lsampl_t *)dev->private)[chan];
193 /* DAC-02 registers */
194 #define DAC02_LSB(a) (2 * a)
195 #define DAC02_MSB(a) (2 * a + 1)
197 static int dac02_ao_winsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
203 chan = CR_CHAN(insn->chanspec);
204 ((lsampl_t *)dev->private)[chan] = data[0];
207 // convert to complementary binary if range is bipolar
208 if((CR_RANGE(insn->chanspec) & 0x2) == 0)
211 temp = (output << 4) & 0xf0;
212 outb(temp, dev->iobase + DAC02_LSB(chan));
213 temp = (output >> 4) & 0xff;
214 outb(temp, dev->iobase + DAC02_MSB(chan));
219 static int pcl733_insn_bits(comedi_device *dev,comedi_subdevice *s,
220 comedi_insn *insn,lsampl_t *data)
222 if(insn->n!=2)return -EINVAL;
224 data[1] = inb(dev->iobase + 0);
225 data[1] |= (inb(dev->iobase + 1) << 8);
226 data[1] |= (inb(dev->iobase + 2) << 16);
227 data[1] |= (inb(dev->iobase + 3) << 24);
232 static int pcl734_insn_bits(comedi_device *dev,comedi_subdevice *s,
233 comedi_insn *insn,lsampl_t *data)
235 if(insn->n!=2)return -EINVAL;
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);