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/*
comedi/drivers/poc.c
Mini-drivers for POC (Piece of Crap) boards
Copyright (C) 2000 Frank Mori Hess <fmhess@users.sourceforge.net>
Copyright (C) 2001 David A. Schleef <ds@schleef.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
Driver: poc
Description: Generic driver for very simple devices
Author: ds
Devices: [Keithley Metrabyte] DAC-02 (dac02), [Advantech] PCL-733 (pcl733),
PCL-734 (pcl734)
Updated: Sat, 16 Mar 2002 17:34:48 -0800
Status: unknown
This driver is indended to support very simple ISA-based devices,
including:
dac02 - Keithley DAC-02 analog output board
pcl733 - Advantech PCL-733
pcl734 - Advantech PCL-734
Configuration options:
[0] - I/O port base
*/
#include "../comedidev.h"
#include <linux/ioport.h>
static int poc_attach(struct comedi_device *dev, struct comedi_devconfig *it);
static int poc_detach(struct comedi_device *dev);
static int readback_insn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int dac02_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int pcl733_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int pcl734_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
struct boarddef_struct {
const char *name;
unsigned int iosize;
int (*setup) (struct comedi_device *);
int type;
int n_chan;
int n_bits;
int (*winsn) (struct comedi_device *, struct comedi_subdevice *,
struct comedi_insn *, unsigned int *);
int (*rinsn) (struct comedi_device *, struct comedi_subdevice *,
struct comedi_insn *, unsigned int *);
int (*insnbits) (struct comedi_device *, struct comedi_subdevice *,
struct comedi_insn *, unsigned int *);
const struct comedi_lrange *range;
};
static const struct boarddef_struct boards[] = {
{
.name = "dac02",
.iosize = 8,
/* .setup = dac02_setup, */
.type = COMEDI_SUBD_AO,
.n_chan = 2,
.n_bits = 12,
.winsn = dac02_ao_winsn,
.rinsn = readback_insn,
.range = &range_unknown,
},
{
.name = "pcl733",
.iosize = 4,
.type = COMEDI_SUBD_DI,
.n_chan = 32,
.n_bits = 1,
.insnbits = pcl733_insn_bits,
.range = &range_digital,
},
{
.name = "pcl734",
.iosize = 4,
.type = COMEDI_SUBD_DO,
.n_chan = 32,
.n_bits = 1,
.insnbits = pcl734_insn_bits,
.range = &range_digital,
},
};
#define n_boards ARRAY_SIZE(boards)
#define this_board ((const struct boarddef_struct *)dev->board_ptr)
static struct comedi_driver driver_poc = {
.driver_name = "poc",
.module = THIS_MODULE,
.attach = poc_attach,
.detach = poc_detach,
.board_name = &boards[0].name,
.num_names = n_boards,
.offset = sizeof(boards[0]),
};
static int poc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
struct comedi_subdevice *s;
unsigned long iobase;
unsigned int iosize;
iobase = it->options[0];
printk(KERN_INFO "comedi%d: poc: using %s iobase 0x%lx\n", dev->minor,
this_board->name, iobase);
dev->board_name = this_board->name;
if (iobase == 0) {
printk(KERN_ERR "io base address required\n");
return -EINVAL;
}
iosize = this_board->iosize;
/* check if io addresses are available */
if (!request_region(iobase, iosize, "dac02")) {
printk(KERN_ERR "I/O port conflict: failed to allocate ports "
"0x%lx to 0x%lx\n", iobase, iobase + iosize - 1);
return -EIO;
}
dev->iobase = iobase;
if (alloc_subdevices(dev, 1) < 0)
return -ENOMEM;
if (alloc_private(dev, sizeof(unsigned int) * this_board->n_chan) < 0)
return -ENOMEM;
/* analog output subdevice */
s = dev->subdevices + 0;
s->type = this_board->type;
s->n_chan = this_board->n_chan;
s->maxdata = (1 << this_board->n_bits) - 1;
s->range_table = this_board->range;
s->insn_write = this_board->winsn;
s->insn_read = this_board->rinsn;
s->insn_bits = this_board->insnbits;
if (s->type == COMEDI_SUBD_AO || s->type == COMEDI_SUBD_DO)
s->subdev_flags = SDF_WRITABLE;
return 0;
}
static int poc_detach(struct comedi_device *dev)
{
/* only free stuff if it has been allocated by _attach */
if (dev->iobase)
release_region(dev->iobase, this_board->iosize);
printk(KERN_INFO "comedi%d: dac02: remove\n", dev->minor);
return 0;
}
static int readback_insn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int chan;
chan = CR_CHAN(insn->chanspec);
data[0] = ((unsigned int *)dev->private)[chan];
return 1;
}
/* DAC-02 registers */
#define DAC02_LSB(a) (2 * a)
#define DAC02_MSB(a) (2 * a + 1)
static int dac02_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int temp;
int chan;
int output;
chan = CR_CHAN(insn->chanspec);
((unsigned int *)dev->private)[chan] = data[0];
output = data[0];
#ifdef wrong
/* convert to complementary binary if range is bipolar */
if ((CR_RANGE(insn->chanspec) & 0x2) == 0)
output = ~output;
#endif
temp = (output << 4) & 0xf0;
outb(temp, dev->iobase + DAC02_LSB(chan));
temp = (output >> 4) & 0xff;
outb(temp, dev->iobase + DAC02_MSB(chan));
return 1;
}
static int pcl733_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
if (insn->n != 2)
return -EINVAL;
data[1] = inb(dev->iobase + 0);
data[1] |= (inb(dev->iobase + 1) << 8);
data[1] |= (inb(dev->iobase + 2) << 16);
data[1] |= (inb(dev->iobase + 3) << 24);
return 2;
}
static int pcl734_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
if (insn->n != 2)
return -EINVAL;
if (data[0]) {
s->state &= ~data[0];
s->state |= (data[0] & data[1]);
if ((data[0] >> 0) & 0xff)
outb((s->state >> 0) & 0xff, dev->iobase + 0);
if ((data[0] >> 8) & 0xff)
outb((s->state >> 8) & 0xff, dev->iobase + 1);
if ((data[0] >> 16) & 0xff)
outb((s->state >> 16) & 0xff, dev->iobase + 2);
if ((data[0] >> 24) & 0xff)
outb((s->state >> 24) & 0xff, dev->iobase + 3);
}
data[1] = s->state;
return 2;
}
static int __init driver_poc_init_module(void)
{
return comedi_driver_register(&driver_poc);
}
static void __exit driver_poc_cleanup_module(void)
{
comedi_driver_unregister(&driver_poc);
}
module_init(driver_poc_init_module);
module_exit(driver_poc_cleanup_module);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
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