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