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