2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for some a4tech "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/input.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "hid-ids.h"
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#define A4_2WHEEL_MOUSE_HACK_7 0x01
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#define A4_2WHEEL_MOUSE_HACK_B8 0x02
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struct a4tech_sc {
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unsigned long quirks;
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unsigned int hw_wheel;
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__s32 delayed_value;
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};
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static int a4_input_mapped(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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struct a4tech_sc *a4 = hid_get_drvdata(hdev);
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if (usage->type == EV_REL && usage->code == REL_WHEEL)
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set_bit(REL_HWHEEL, *bit);
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if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007)
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return -1;
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return 0;
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}
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static int a4_event(struct hid_device *hdev, struct hid_field *field,
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struct hid_usage *usage, __s32 value)
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{
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struct a4tech_sc *a4 = hid_get_drvdata(hdev);
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struct input_dev *input;
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if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
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!usage->type)
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return 0;
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input = field->hidinput->input;
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if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) {
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if (usage->type == EV_REL && usage->code == REL_WHEEL) {
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a4->delayed_value = value;
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return 1;
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}
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if (usage->hid == 0x000100b8) {
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input_event(input, EV_REL, value ? REL_HWHEEL :
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REL_WHEEL, a4->delayed_value);
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return 1;
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}
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}
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if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) {
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a4->hw_wheel = !!value;
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return 1;
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}
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if (usage->code == REL_WHEEL && a4->hw_wheel) {
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input_event(input, usage->type, REL_HWHEEL, value);
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return 1;
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}
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return 0;
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}
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static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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struct a4tech_sc *a4;
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int ret;
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a4 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL);
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if (a4 == NULL) {
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hid_err(hdev, "can't alloc device descriptor\n");
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return -ENOMEM;
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}
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a4->quirks = id->driver_data;
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hid_set_drvdata(hdev, a4);
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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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return ret;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (ret) {
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hid_err(hdev, "hw start failed\n");
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return ret;
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}
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return 0;
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}
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static const struct hid_device_id a4_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU),
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.driver_data = A4_2WHEEL_MOUSE_HACK_7 },
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{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D),
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.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
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{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649),
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.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, a4_devices);
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static struct hid_driver a4_driver = {
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.name = "a4tech",
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.id_table = a4_devices,
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.input_mapped = a4_input_mapped,
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.event = a4_event,
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.probe = a4_probe,
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};
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module_hid_driver(a4_driver);
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MODULE_LICENSE("GPL");
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