/*
|
* Analogy for Linux, driver related features
|
*
|
* Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
|
* Copyright (C) 2008 Alexis Berlemont <alexis.berlemont@free.fr>
|
*
|
* Xenomai 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.
|
*
|
* Xenomai 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 Xenomai; if not, write to the Free Software Foundation,
|
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
*/
|
#include <linux/module.h>
|
#include <linux/fs.h>
|
#include <rtdm/analogy/device.h>
|
|
#include "proc.h"
|
|
static LIST_HEAD(a4l_drvs);
|
|
/* --- Driver list management functions --- */
|
|
int a4l_lct_drv(char *pin, struct a4l_driver ** pio)
|
{
|
struct list_head *this;
|
int ret = -EINVAL;
|
|
__a4l_dbg(1, core_dbg, "name=%s\n", pin);
|
|
/* Goes through the linked list so as to find
|
a driver instance with the same name */
|
list_for_each(this, &a4l_drvs) {
|
struct a4l_driver *drv = list_entry(this, struct a4l_driver, list);
|
|
if (strcmp(drv->board_name, pin) == 0) {
|
/* The argument pio can be NULL
|
if there is no need to retrieve the pointer */
|
if (pio != NULL)
|
*pio = drv;
|
ret = 0;
|
break;
|
}
|
}
|
|
return ret;
|
}
|
|
int a4l_register_drv(struct a4l_driver * drv)
|
{
|
if (!rtdm_available())
|
return -ENOSYS;
|
|
__a4l_dbg(1, core_dbg, "board name=%s\n", drv->board_name);
|
|
if (a4l_lct_drv(drv->board_name, NULL) != 0) {
|
list_add(&drv->list, &a4l_drvs);
|
return 0;
|
} else
|
return -EINVAL;
|
}
|
|
int a4l_unregister_drv(struct a4l_driver * drv)
|
{
|
__a4l_dbg(1, core_dbg, "board name=%s\n", drv->board_name);
|
|
if (a4l_lct_drv(drv->board_name, NULL) == 0) {
|
/* Here, we consider the argument is pointing
|
to a real driver struct (not a blank structure
|
with only the name field properly set */
|
list_del(&drv->list);
|
return 0;
|
} else
|
return -EINVAL;
|
}
|
|
#ifdef CONFIG_PROC_FS
|
|
/* --- Driver list proc section --- */
|
|
int a4l_rdproc_drvs(struct seq_file *p, void *data)
|
{
|
int i = 0;
|
struct list_head *this;
|
|
seq_printf(p, "-- Analogy drivers --\n\n");
|
|
seq_printf(p, "| idx | board name \n");
|
|
list_for_each(this, &a4l_drvs) {
|
struct a4l_driver *drv = list_entry(this, struct a4l_driver, list);
|
seq_printf(p, "| %02d | %s \n", i++, drv->board_name);
|
}
|
return 0;
|
}
|
|
#endif /* CONFIG_PROC_FS */
|
