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/*
* dmx_interface.c
*
* Copyright (C) Michael Stickel <michael@cubic.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#define __NO_VERSION__
#include <linux/module.h>
#include <dmxdev/dmxdevP.h>
#include <dmxdev/llist.h>
#include <linux/slab.h>
DMXInterface *dmx_alloc_interface (void)
{
/* DMXInterface *i = (DMXInterface *)kmalloc (sizeof(DMXInterface), GFP_KERNEL); */
DMXInterface *i = DMX_ALLOC(DMXInterface);
return i;
}
void dmx_free_interface (DMXInterface *i)
{
if (i) kfree (i);
}
static DMXProperty *dmx_interface_find_property (DMXInterface *dif, char *name)
{
DMXProperty *p = NULL;
if (dif && name)
{
DMXPropList *pl = dif->props;
if (pl && pl->find)
p = pl->find (pl, name);
}
return p;
}
/*
*
*/
DMXInterface *dmx_family_create_interface (DMXFamily *f, DMXPropList *pl)
{
if (f && f->drivers && f->autoprobe_driver)
{
DMXDriver *drv = f->autoprobe_driver (f, pl);
if (drv)
{
DMXInterface *dmxif = drv->create_interface (drv, pl);
if (dmxif)
return dmxif;
}
}
if (pl)
pl->delete(pl);
return NULL;
}
DMXInterface *dmx_create_interface (DMXDriver *drv, DMXPropList *props)
{
DMXInterface *i = dmx_alloc_interface ();
if (i)
{
i->next = NULL;
i->driver = drv;
i->props = NULL;
i->num_universes = 0;
i->universes = NULL;
i->create_universe = dmx_create_universe;
i->delete = dmx_delete_interface;
i->user_delete = NULL;
i->current_universes = 0;
i->max_universes = 0;
i->props = props?props:dmxproplist_create();
i->findprop = dmx_interface_find_property;
/*
* give the user-driver a chance to make some updates..
*/
if (drv->user_create_interface && drv->user_create_interface (i, props) < 0)
{
dmx_free_interface (i);
printk (KERN_INFO "interface creation failed\n");
return NULL;
}
/* wait(i->sem); */
LLIST_INSERT(drv->interfaces, i);
/* signal(i->sem); */
printk (KERN_INFO "interface of driver %s created\n", (i->driver)?(i->driver->name):"drv=NULL");
}
return i;
}
static int dmx_remove_interface (DMXInterface *i)
{
if (i && i->driver && i->driver->interfaces)
{
LLIST_REMOVE(i->driver->interfaces, i);
}
return 0;
}
/*
* removes an interface
*/
int dmx_delete_interface (DMXInterface *i)
{
if (i)
{
DMXUniverse *u = NULL;
/* if (wait(i->sem) < 0) return -1;
wait(..) returns an error if semaphore is deleted
*/
dmx_remove_interface (i);
while ((u=i->universes))
{
if (u->delete)
u->delete(u);
else
printk (KERN_INFO "FATAL: delete method for universe is NULL\n");
}
/*
* notify user-driver that the universe has been deleted
*/
if (i->user_delete)
i->user_delete (i);
if (i->props && i->props->delete)
i->props->delete(i->props);
dmx_free_interface(i);
printk (KERN_INFO "interface deleted\n");
}
return 0;
}
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