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/*
* Zorro Driver Services
*
* Copyright (C) 2003 Geert Uytterhoeven
*
* Loosely based on drivers/pci/pci-driver.c
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/zorro.h>
/**
* zorro_match_device - Tell if a Zorro device structure has a matching
* Zorro device id structure
* @ids: array of Zorro device id structures to search in
* @dev: the Zorro device structure to match against
*
* Used by a driver to check whether a Zorro device present in the
* system is in its list of supported devices. Returns the matching
* zorro_device_id structure or %NULL if there is no match.
*/
const struct zorro_device_id *
zorro_match_device(const struct zorro_device_id *ids,
const struct zorro_dev *z)
{
while (ids->id) {
if (ids->id == ZORRO_WILDCARD || ids->id == z->id)
return ids;
ids++;
}
return NULL;
}
static int zorro_device_probe(struct device *dev)
{
int error = 0;
struct zorro_driver *drv = to_zorro_driver(dev->driver);
struct zorro_dev *z = to_zorro_dev(dev);
if (!z->driver && drv->probe) {
const struct zorro_device_id *id;
id = zorro_match_device(drv->id_table, z);
if (id)
error = drv->probe(z, id);
if (error >= 0) {
z->driver = drv;
error = 0;
}
}
return error;
}
/**
* zorro_register_driver - register a new Zorro driver
* @drv: the driver structure to register
*
* Adds the driver structure to the list of registered drivers
* Returns the number of Zorro devices which were claimed by the driver
* during registration. The driver remains registered even if the
* return value is zero.
*/
int zorro_register_driver(struct zorro_driver *drv)
{
int count = 0;
/* initialize common driver fields */
drv->driver.name = drv->name;
drv->driver.bus = &zorro_bus_type;
drv->driver.probe = zorro_device_probe;
/* register with core */
count = driver_register(&drv->driver);
return count ? count : 1;
}
/**
* zorro_unregister_driver - unregister a zorro driver
* @drv: the driver structure to unregister
*
* Deletes the driver structure from the list of registered Zorro drivers,
* gives it a chance to clean up by calling its remove() function for
* each device it was responsible for, and marks those devices as
* driverless.
*/
void zorro_unregister_driver(struct zorro_driver *drv)
{
driver_unregister(&drv->driver);
}
/**
* zorro_bus_match - Tell if a Zorro device structure has a matching Zorro
* device id structure
* @ids: array of Zorro device id structures to search in
* @dev: the Zorro device structure to match against
*
* Used by a driver to check whether a Zorro device present in the
* system is in its list of supported devices.Returns the matching
* zorro_device_id structure or %NULL if there is no match.
*/
static int zorro_bus_match(struct device *dev, struct device_driver *drv)
{
struct zorro_dev *z = to_zorro_dev(dev);
struct zorro_driver *zorro_drv = to_zorro_driver(drv);
const struct zorro_device_id *ids = zorro_drv->id_table;
if (!ids)
return 0;
while (ids->id) {
if (ids->id == ZORRO_WILDCARD || ids->id == z->id)
return 1;
ids++;
}
return 0;
}
struct bus_type zorro_bus_type = {
.name = "zorro",
.match = zorro_bus_match
};
static int __init zorro_driver_init(void)
{
return bus_register(&zorro_bus_type);
}
postcore_initcall(zorro_driver_init);
EXPORT_SYMBOL(zorro_match_device);
EXPORT_SYMBOL(zorro_register_driver);
EXPORT_SYMBOL(zorro_unregister_driver);
EXPORT_SYMBOL(zorro_dev_driver);
EXPORT_SYMBOL(zorro_bus_type);
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