mirror of
https://github.com/joel16/android_kernel_sony_msm8994.git
synced 2024-11-30 07:31:23 +00:00
b454cc6636
This is a set of changes to convert support for the TURBOchannel bus to the driver model. It implements the usual set of calls similar to what other bus drivers have: tc_register_driver(), tc_unregister_driver(), etc. All the platform-specific bits have been removed and headers from asm-mips/dec/ have been merged into linux/tc.h, which should be included by drivers. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
const struct tc_device_id *tc_match_device(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;
|
|
}
|
|
EXPORT_SYMBOL(tc_match_device);
|
|
|
|
/**
|
|
* 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, struct device_driver *drv)
|
|
{
|
|
struct tc_dev *tdev = to_tc_dev(dev);
|
|
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;
|
|
}
|
|
|
|
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);
|