/*
* TURBOchannel driver services .
*
* Copyright ( c ) 2005 James Simmons
* Copyright ( c ) 2006 Maciej W . Rozycki
*
* Loosely based on drivers / dio / dio - driver . c and
* 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/tc.h>
/**
* tc_register_driver - register a new TC driver
* @ drv : the driver structure to register
*
* Adds the driver structure to the list of registered drivers
* Returns a negative value on error , otherwise 0 .
* If no error occurred , the driver remains registered even if
* no device was claimed during registration .
*/
int tc_register_driver(struct tc_driver *tdrv)
{
return driver_register(&tdrv->driver);
}
EXPORT_SYMBOL(tc_register_driver);
/**
* tc_unregister_driver - unregister a TC driver
* @ drv : the driver structure to unregister
*
* Deletes the driver structure from the list of registered TC 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 tc_unregister_driver(struct tc_driver *tdrv)
{
driver_unregister(&tdrv->driver);
}
EXPORT_SYMBOL(tc_unregister_driver);
/**
* tc_match_device - tell if a TC device structure has a matching
* TC device ID structure
* @ tdrv : the TC driver to earch for matching TC device ID strings
* @ tdev : the TC device structure to match against
*
* Used by a driver to check whether a TC device present in the
* system is in its list of supported devices . Returns the matching
* tc_device_id structure or % NULL if there is no match .
*/
static const struct tc_device_id *tc_match_device(const struct tc_driver *tdrv,
struct tc_dev *tdev)
{
const struct tc_device_id *id = tdrv->id_table;
if (id) {
while (id->name[0 ] || id->vendor[0 ]) {
if (strcmp(tdev->name, id->name) == 0 &&
strcmp(tdev->vendor, id->vendor) == 0 )
return id;
id++;
}
}
return NULL;
}
/**
* tc_bus_match - Tell if a device structure has a matching
* TC device ID structure
* @ dev : the device structure to match against
* @ drv : the device driver to search for matching TC device ID strings
*
* Used by a driver to check whether a TC device present in the
* system is in its list of supported devices . Returns 1 if there
* is a match or 0 otherwise .
*/
static int tc_bus_match(struct device *dev, const struct device_driver *drv)
{
struct tc_dev *tdev = to_tc_dev(dev);
const struct tc_driver *tdrv = to_tc_driver(drv);
const struct tc_device_id *id;
id = tc_match_device(tdrv, tdev);
if (id)
return 1 ;
return 0 ;
}
const struct bus_type tc_bus_type = {
.name = "tc" ,
.match = tc_bus_match,
};
EXPORT_SYMBOL(tc_bus_type);
static int __init tc_driver_init(void )
{
return bus_register(&tc_bus_type);
}
postcore_initcall(tc_driver_init);
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