mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 19:06:43 +07:00
Staging: comedi: add dt2817 driver
Driver for DataTranslation DT2817 From: David Schleef <ds@schleef.org> Cc: Ian Abbott <abbotti@mev.co.uk> Cc: Frank Mori Hess <fmhess@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Schleef
Greg Kroah-Hartman
parent
d6a929b760
commit
0e221af2e9
178
drivers/staging/comedi/drivers/dt2817.c
Normal file
178
drivers/staging/comedi/drivers/dt2817.c
Normal file
@ -0,0 +1,178 @@
|
||||
/*
|
||||
comedi/drivers/dt2817.c
|
||||
Hardware driver for Data Translation DT2817
|
||||
|
||||
COMEDI - Linux Control and Measurement Device Interface
|
||||
Copyright (C) 1998 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: dt2817
|
||||
Description: Data Translation DT2817
|
||||
Author: ds
|
||||
Status: complete
|
||||
Devices: [Data Translation] DT2817 (dt2817)
|
||||
|
||||
A very simple digital I/O card. Four banks of 8 lines, each bank
|
||||
is configurable for input or output. One wonders why it takes a
|
||||
50 page manual to describe this thing.
|
||||
|
||||
The driver (which, btw, is much less than 50 pages) has 1 subdevice
|
||||
with 32 channels, configurable in groups of 8.
|
||||
|
||||
Configuration options:
|
||||
[0] - I/O port base base address
|
||||
*/
|
||||
|
||||
#include "../comedidev.h"
|
||||
|
||||
#include <linux/ioport.h>
|
||||
|
||||
#define DT2817_SIZE 5
|
||||
|
||||
#define DT2817_CR 0
|
||||
#define DT2817_DATA 1
|
||||
|
||||
static int dt2817_attach(comedi_device * dev, comedi_devconfig * it);
|
||||
static int dt2817_detach(comedi_device * dev);
|
||||
static comedi_driver driver_dt2817 = {
|
||||
driver_name:"dt2817",
|
||||
module:THIS_MODULE,
|
||||
attach:dt2817_attach,
|
||||
detach:dt2817_detach,
|
||||
};
|
||||
|
||||
COMEDI_INITCLEANUP(driver_dt2817);
|
||||
|
||||
static int dt2817_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
|
||||
comedi_insn * insn, lsampl_t * data)
|
||||
{
|
||||
int mask;
|
||||
int chan;
|
||||
int oe = 0;
|
||||
|
||||
if (insn->n != 1)
|
||||
return -EINVAL;
|
||||
|
||||
chan = CR_CHAN(insn->chanspec);
|
||||
if (chan < 8) {
|
||||
mask = 0xff;
|
||||
} else if (chan < 16) {
|
||||
mask = 0xff00;
|
||||
} else if (chan < 24) {
|
||||
mask = 0xff0000;
|
||||
} else
|
||||
mask = 0xff000000;
|
||||
if (data[0])
|
||||
s->io_bits |= mask;
|
||||
else
|
||||
s->io_bits &= ~mask;
|
||||
|
||||
if (s->io_bits & 0x000000ff)
|
||||
oe |= 0x1;
|
||||
if (s->io_bits & 0x0000ff00)
|
||||
oe |= 0x2;
|
||||
if (s->io_bits & 0x00ff0000)
|
||||
oe |= 0x4;
|
||||
if (s->io_bits & 0xff000000)
|
||||
oe |= 0x8;
|
||||
|
||||
outb(oe, dev->iobase + DT2817_CR);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int dt2817_dio_insn_bits(comedi_device * dev, comedi_subdevice * s,
|
||||
comedi_insn * insn, lsampl_t * data)
|
||||
{
|
||||
unsigned int changed;
|
||||
|
||||
/* It's questionable whether it is more important in
|
||||
* a driver like this to be deterministic or fast.
|
||||
* We choose fast. */
|
||||
|
||||
if (data[0]) {
|
||||
changed = s->state;
|
||||
s->state &= ~data[0];
|
||||
s->state |= (data[0] & data[1]);
|
||||
changed ^= s->state;
|
||||
changed &= s->io_bits;
|
||||
if (changed & 0x000000ff)
|
||||
outb(s->state & 0xff, dev->iobase + DT2817_DATA + 0);
|
||||
if (changed & 0x0000ff00)
|
||||
outb((s->state >> 8) & 0xff,
|
||||
dev->iobase + DT2817_DATA + 1);
|
||||
if (changed & 0x00ff0000)
|
||||
outb((s->state >> 16) & 0xff,
|
||||
dev->iobase + DT2817_DATA + 2);
|
||||
if (changed & 0xff000000)
|
||||
outb((s->state >> 24) & 0xff,
|
||||
dev->iobase + DT2817_DATA + 3);
|
||||
}
|
||||
data[1] = inb(dev->iobase + DT2817_DATA + 0);
|
||||
data[1] |= (inb(dev->iobase + DT2817_DATA + 1) << 8);
|
||||
data[1] |= (inb(dev->iobase + DT2817_DATA + 2) << 16);
|
||||
data[1] |= (inb(dev->iobase + DT2817_DATA + 3) << 24);
|
||||
|
||||
return 2;
|
||||
}
|
||||
|
||||
static int dt2817_attach(comedi_device * dev, comedi_devconfig * it)
|
||||
{
|
||||
int ret;
|
||||
comedi_subdevice *s;
|
||||
unsigned long iobase;
|
||||
|
||||
iobase = it->options[0];
|
||||
printk("comedi%d: dt2817: 0x%04lx ", dev->minor, iobase);
|
||||
if (!request_region(iobase, DT2817_SIZE, "dt2817")) {
|
||||
printk("I/O port conflict\n");
|
||||
return -EIO;
|
||||
}
|
||||
dev->iobase = iobase;
|
||||
dev->board_name = "dt2817";
|
||||
|
||||
if ((ret = alloc_subdevices(dev, 1)) < 0)
|
||||
return ret;
|
||||
|
||||
s = dev->subdevices + 0;
|
||||
|
||||
s->n_chan = 32;
|
||||
s->type = COMEDI_SUBD_DIO;
|
||||
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
|
||||
s->range_table = &range_digital;
|
||||
s->maxdata = 1;
|
||||
s->insn_bits = dt2817_dio_insn_bits;
|
||||
s->insn_config = dt2817_dio_insn_config;
|
||||
|
||||
s->state = 0;
|
||||
outb(0, dev->iobase + DT2817_CR);
|
||||
|
||||
printk("\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int dt2817_detach(comedi_device * dev)
|
||||
{
|
||||
printk("comedi%d: dt2817: remove\n", dev->minor);
|
||||
|
||||
if (dev->iobase)
|
||||
release_region(dev->iobase, DT2817_SIZE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user