Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | /*
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 int mpc8260cpm_attach(struct comedi_device *dev,
struct comedi_devconfig *it);
static int mpc8260cpm_detach(struct comedi_device *dev);
static struct comedi_driver driver_mpc8260cpm = {
.driver_name = "mpc8260cpm",
.module = THIS_MODULE,
.attach = mpc8260cpm_attach,
.detach = mpc8260cpm_detach,
};
static int __init driver_mpc8260cpm_init_module(void)
{
return comedi_driver_register(&driver_mpc8260cpm);
}
static void __exit driver_mpc8260cpm_cleanup_module(void)
{
comedi_driver_unregister(&driver_mpc8260cpm);
}
module_init(driver_mpc8260cpm_init_module);
module_exit(driver_mpc8260cpm_cleanup_module);
static int mpc8260cpm_dio_config(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int mpc8260cpm_dio_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
static int mpc8260cpm_attach(struct comedi_device *dev,
struct comedi_devconfig *it)
{
struct comedi_subdevice *s;
int i;
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;
if (alloc_subdevices(dev, 4) < 0)
return -ENOMEM;
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 int mpc8260cpm_detach(struct comedi_device *dev)
{
printk("comedi%d: mpc8260cpm: remove\n", dev->minor);
return 0;
}
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 2;
}
|