108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/*
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* HID support for Linux
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*
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* Copyright (c) 1999 Andreas Gal
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* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
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* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
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* Copyright (c) 2007-2008 Oliver Neukum
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* Copyright (c) 2006-2012 Jiri Kosina
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* Copyright (c) 2012 Henrik Rydberg
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <asm/unaligned.h>
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#include <asm/byteorder.h>
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#include <linux/hid.h>
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static struct hid_driver hid_generic;
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static int __unmap_hid_generic(struct device *dev, void *data)
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{
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struct hid_driver *hdrv = data;
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struct hid_device *hdev = to_hid_device(dev);
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/* only unbind matching devices already bound to hid-generic */
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if (hdev->driver != &hid_generic ||
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hid_match_device(hdev, hdrv) == NULL)
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return 0;
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if (dev->parent) /* Needed for USB */
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device_lock(dev->parent);
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device_release_driver(dev);
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if (dev->parent)
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device_unlock(dev->parent);
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return 0;
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}
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static void hid_generic_add_driver(struct hid_driver *hdrv)
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{
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bus_for_each_dev(&hid_bus_type, NULL, hdrv, __unmap_hid_generic);
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}
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static void hid_generic_removed_driver(struct hid_driver *hdrv)
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{
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int ret;
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ret = driver_attach(&hid_generic.driver);
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}
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static int __check_hid_generic(struct device_driver *drv, void *data)
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{
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struct hid_driver *hdrv = to_hid_driver(drv);
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struct hid_device *hdev = data;
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if (hdrv == &hid_generic)
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return 0;
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return hid_match_device(hdev, hdrv) != NULL;
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}
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static bool hid_generic_match(struct hid_device *hdev,
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bool ignore_special_driver)
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{
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if (ignore_special_driver)
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return true;
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if (hdev->quirks & HID_QUIRK_HAVE_SPECIAL_DRIVER)
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return false;
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/*
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* If any other driver wants the device, leave the device to this other
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* driver.
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*/
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if (bus_for_each_drv(&hid_bus_type, NULL, hdev, __check_hid_generic))
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return false;
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return true;
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}
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static const struct hid_device_id hid_table[] = {
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{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, HID_ANY_ID, HID_ANY_ID) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, hid_table);
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static struct hid_driver hid_generic = {
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.name = "hid-generic",
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.id_table = hid_table,
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.match = hid_generic_match,
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.bus_add_driver = hid_generic_add_driver,
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.bus_removed_driver = hid_generic_removed_driver,
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};
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module_hid_driver(hid_generic);
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MODULE_AUTHOR("Henrik Rydberg");
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MODULE_DESCRIPTION("HID generic driver");
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MODULE_LICENSE("GPL");
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