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/*
module/proc.c
/proc interface for comedi
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.
*/
/*
This is some serious bloatware.
Taken from Dave A.'s PCL-711 driver, 'cuz I thought it
was cool.
*/
#include "comedidev.h"
#include "comedi_internal.h"
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
static int comedi_read(struct seq_file *m, void *v)
{
int i;
int devices_q = 0;
struct comedi_driver *driv;
seq_printf(m,
"comedi version " COMEDI_RELEASE "\n"
"format string: %s\n",
"\"%2d: %-20s %-20s %4d\", i, "
"driver_name, board_name, n_subdevices");
for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
struct comedi_device *dev = comedi_dev_from_minor(i);
if (!dev)
continue;
if (dev->attached) {
devices_q = 1;
seq_printf(m, "%2d: %-20s %-20s %4d\n",
i, dev->driver->driver_name,
dev->board_name, dev->n_subdevices);
}
}
if (!devices_q)
seq_puts(m, "no devices\n");
for (driv = comedi_drivers; driv; driv = driv->next) {
seq_printf(m, "%s:\n", driv->driver_name);
for (i = 0; i < driv->num_names; i++)
seq_printf(m, " %s\n",
*(char **)((char *)driv->board_name +
i * driv->offset));
if (!driv->num_names)
seq_printf(m, " %s\n", driv->driver_name);
}
return 0;
}
/*
* seq_file wrappers for procfile show routines.
*/
static int comedi_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, comedi_read, NULL);
}
static const struct file_operations comedi_proc_fops = {
.open = comedi_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
void comedi_proc_init(void)
{
proc_create("comedi", 0644, NULL, &comedi_proc_fops);
}
void comedi_proc_cleanup(void)
{
remove_proc_entry("comedi", NULL);
}
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