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/*
comedi/drivers/mpc8260.c
driver for digital I/O pins on the MPC 8260 CPM module
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 2000,2001 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: mpc8260cpm
Description: MPC8260 CPM module generic digital I/O lines
Devices: [Motorola] MPC8260 CPM (mpc8260cpm)
Author: ds
Status: experimental
Updated: Sat, 16 Mar 2002 17:34:48 -0800
This driver is specific to the Motorola MPC8260 processor, allowing
you to access the processor's generic digital I/O lines.
It is apparently missing some code.
*/
#include "../comedidev.h"
extern unsigned long mpc8260_dio_reserved[4];
struct mpc8260cpm_private {
int data;
};
#define devpriv ((struct mpc8260cpm_private *)dev->private)
static unsigned long *cpm_pdat(int port)
{
switch (port) {
case 0:
return &io->iop_pdata;
case 1:
return &io->iop_pdatb;
case 2:
return &io->iop_pdatc;
case 3:
return &io->iop_pdatd;
}
}
static int mpc8260cpm_dio_config(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int n;
unsigned int d;
unsigned int mask;
int port;
port = (int)s->private;
mask = 1 << CR_CHAN(insn->chanspec);
if (mask & cpm_reserved_bits[port]) {
return -EINVAL;
}
switch (data[0]) {
case INSN_CONFIG_DIO_OUTPUT:
s->io_bits |= mask;
break;
case INSN_CONFIG_DIO_INPUT:
s->io_bits &= ~mask;
break;
case INSN_CONFIG_DIO_QUERY:
data[1] = (s->io_bits & mask) ? COMEDI_OUTPUT : COMEDI_INPUT;
return insn->n;
break;
default:
return -EINVAL;
}
switch (port) {
case 0:
return &io->iop_pdira;
case 1:
return &io->iop_pdirb;
case 2:
return &io->iop_pdirc;
case 3:
return &io->iop_pdird;
}
return 1;
}
static int mpc8260cpm_dio_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int port;
unsigned long *p;
p = cpm_pdat((int)s->private);
return insn->n;
}
static int mpc8260cpm_attach(struct comedi_device *dev,
struct comedi_devconfig *it)
{
struct comedi_subdevice *s;
int i;
int ret;
printk("comedi%d: mpc8260cpm: ", dev->minor);
dev->board_ptr = mpc8260cpm_boards + dev->board;
dev->board_name = thisboard->name;
if (alloc_private(dev, sizeof(struct mpc8260cpm_private)) < 0)
return -ENOMEM;
ret =comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;
for (i = 0; i < 4; i++) {
s = dev->subdevices + i;
s->type = COMEDI_SUBD_DIO;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
s->n_chan = 32;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_config = mpc8260cpm_dio_config;
s->insn_bits = mpc8260cpm_dio_bits;
}
return 1;
}
static void mpc8260cpm_detach(struct comedi_device *dev)
{
/* Nothing to cleanup */
}
static struct comedi_driver mpc8260cpm_driver = {
.driver_name = "mpc8260cpm",
.module = THIS_MODULE,
.attach = mpc8260cpm_attach,
.detach = mpc8260cpm_detach,
};
module_comedi_driver(mpc8260cpm_driver);
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