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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Pawel Zalewski (The Capable Hub)andBenjamin Tissoires
4de4b8a5dd
The module is storing an integer inside the drvdata pointer, which is confusing, lets fix this and set the whole of 'hid_device_id' struct as the drvdata and then simply use its integer 'driver_data' field for quirks, which shall make the code cleaner, type-safe, consistent and more readable. This makes the cast to (void *) during storage a bit safer (just to suppress the const qualifier warning) and the cast to (unsigned long) during retrieval is removed. Signed-off-by: Pawel Zalewski (The Capable Hub) <pzalewski@thegoodpenguin.co.uk> Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for some belkin "special" devices
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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) 2006-2007 Jiri Kosina
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* Copyright (c) 2008 Jiri Slaby
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*/
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/*
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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#define BELKIN_HIDDEV 0x01
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#define BELKIN_WKBD 0x02
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#define belkin_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
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EV_KEY, (c))
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static int belkin_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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const struct hid_device_id *id = hid_get_drvdata(hdev);
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unsigned long quirks = id->driver_data;
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if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER ||
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!(quirks & BELKIN_WKBD))
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return 0;
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switch (usage->hid & HID_USAGE) {
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case 0x03a: belkin_map_key_clear(KEY_SOUND); break;
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case 0x03b: belkin_map_key_clear(KEY_CAMERA); break;
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case 0x03c: belkin_map_key_clear(KEY_DOCUMENTS); break;
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default:
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return 0;
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}
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return 1;
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}
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static int belkin_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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unsigned long quirks = id->driver_data;
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int ret;
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hid_set_drvdata(hdev, (void *)id);
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ret = hid_parse(hdev);
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if (ret) {
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hid_err(hdev, "parse failed\n");
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goto err_free;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
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((quirks & BELKIN_HIDDEV) ? HID_CONNECT_HIDDEV_FORCE : 0));
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if (ret) {
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hid_err(hdev, "hw start failed\n");
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goto err_free;
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}
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return 0;
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err_free:
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return ret;
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}
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static const struct hid_device_id belkin_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM),
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.driver_data = BELKIN_HIDDEV },
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{ HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD),
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.driver_data = BELKIN_WKBD },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, belkin_devices);
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static struct hid_driver belkin_driver = {
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.name = "belkin",
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.id_table = belkin_devices,
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.input_mapping = belkin_input_mapping,
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.probe = belkin_probe,
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};
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module_hid_driver(belkin_driver);
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MODULE_DESCRIPTION("HID driver for some belkin \"special\" devices");
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MODULE_LICENSE("GPL");
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