| 1 | |
| 2 | * TURBOchannel driver services.
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| 3 | *
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| 4 | * Copyright (c) 2005 James Simmons
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| 5 | * Copyright (c) 2006 Maciej W. Rozycki
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| 6 | *
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| 7 | * Loosely based on drivers/dio/dio-driver.c and
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| 8 | * drivers/pci/pci-driver.c.
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| 9 | *
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| 10 | * This file is subject to the terms and conditions of the GNU
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| 11 | * General Public License. See the file "COPYING" in the main
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| 12 | * directory of this archive for more details.
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| 13 |
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| 14 |
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| 15 | #include <linux/init.h>
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| 16 | #include <linux/module.h>
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| 17 | #include <linux/tc.h>
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| 18 |
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| 19 | |
| 20 | * tc_register_driver - register a new TC driver
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| 21 | * @drv: the driver structure to register
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| 22 | *
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| 23 | * Adds the driver structure to the list of registered drivers
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| 24 | * Returns a negative value on error, otherwise 0.
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| 25 | * If no error occurred, the driver remains registered even if
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| 26 | * no device was claimed during registration.
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| 27 |
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| 28 | int tc_register_driver(struct tc_driver *tdrv)
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| 29 | {
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| 30 | return driver_register(&tdrv->driver);
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| 31 | }
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| 32 | EXPORT_SYMBOL(tc_register_driver);
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| 33 |
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| 34 | |
| 35 | * tc_unregister_driver - unregister a TC driver
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| 36 | * @drv: the driver structure to unregister
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| 37 | *
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| 38 | * Deletes the driver structure from the list of registered TC drivers,
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| 39 | * gives it a chance to clean up by calling its remove() function for
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| 40 | * each device it was responsible for, and marks those devices as
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| 41 | * driverless.
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| 42 |
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| 43 | void tc_unregister_driver(struct tc_driver *tdrv)
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| 44 | {
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| 45 | driver_unregister(&tdrv->driver);
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| 46 | }
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| 47 | EXPORT_SYMBOL(tc_unregister_driver);
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| 48 |
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| 49 | |
| 50 | * tc_match_device - tell if a TC device structure has a matching
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| 51 | * TC device ID structure
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| 52 | * @tdrv: the TC driver to earch for matching TC device ID strings
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| 53 | * @tdev: the TC device structure to match against
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| 54 | *
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| 55 | * Used by a driver to check whether a TC device present in the
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| 56 | * system is in its list of supported devices. Returns the matching
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| 57 | * tc_device_id structure or %NULL if there is no match.
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| 58 |
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| 59 | static const struct tc_device_id *tc_match_device(const struct tc_driver *tdrv,
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| 60 | struct tc_dev *tdev)
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| 61 | {
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| 62 | const struct tc_device_id *id = tdrv->id_table;
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| 63 |
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| 64 | if (id) {
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| 65 | while (id->name[0] || id->vendor[0]) {
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| 66 | if (strcmp(tdev->name, id->name) == 0 &&
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| 67 | strcmp(tdev->vendor, id->vendor) == 0)
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| 68 | return id;
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| 69 | id++;
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| 70 | }
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| 71 | }
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| 72 | return NULL;
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| 73 | }
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| 74 |
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| 75 | |
| 76 | * tc_bus_match - Tell if a device structure has a matching
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| 77 | * TC device ID structure
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| 78 | * @dev: the device structure to match against
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| 79 | * @drv: the device driver to search for matching TC device ID strings
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| 80 | *
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| 81 | * Used by a driver to check whether a TC device present in the
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| 82 | * system is in its list of supported devices. Returns 1 if there
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| 83 | * is a match or 0 otherwise.
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| 84 |
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| 85 | static int tc_bus_match(struct device *dev, const struct device_driver *drv)
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| 86 | {
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| 87 | struct tc_dev *tdev = to_tc_dev(dev);
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| 88 | const struct tc_driver *tdrv = to_tc_driver(drv);
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| 89 | const struct tc_device_id *id;
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| 90 |
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| 91 | id = tc_match_device(tdrv, tdev);
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| 92 | if (id)
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| 93 | return 1;
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| 94 |
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| 95 | return 0;
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| 96 | }
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| 97 |
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| 98 | const struct bus_type tc_bus_type = {
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| 99 | .name = "tc",
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| 100 | .match = tc_bus_match,
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| 101 | };
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| 102 | EXPORT_SYMBOL(tc_bus_type);
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| 103 |
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| 104 | static int __init tc_driver_init(void)
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| 105 | {
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| 106 | return bus_register(&tc_bus_type);
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| 107 | }
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| 108 |
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| 109 | postcore_initcall(tc_driver_init);
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