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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | // SPDX-License-Identifier: GPL-2.0-or-later /* * HID driver for some a4tech "special" devices * * Copyright (c) 1999 Andreas Gal * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc * Copyright (c) 2006-2007 Jiri Kosina * Copyright (c) 2008 Jiri Slaby */ /* */ #include <linux/device.h> #include <linux/input.h> #include <linux/hid.h> #include <linux/module.h> #include <linux/slab.h> #include "hid-ids.h" #define A4_2WHEEL_MOUSE_HACK_7 0x01 #define A4_2WHEEL_MOUSE_HACK_B8 0x02 #define A4_WHEEL_ORIENTATION (HID_UP_GENDESK | 0x000000b8) struct a4tech_sc { unsigned long quirks; unsigned int hw_wheel; __s32 delayed_value; }; static int a4_input_mapping(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max) { struct a4tech_sc *a4 = hid_get_drvdata(hdev); if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8 && usage->hid == A4_WHEEL_ORIENTATION) { /* * We do not want to have this usage mapped to anything as it's * nonstandard and doesn't really behave like an HID report. * It's only selecting the orientation (vertical/horizontal) of * the previous mouse wheel report. The input_events will be * generated once both reports are recorded in a4_event(). */ return -1; } return 0; } static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max) { struct a4tech_sc *a4 = hid_get_drvdata(hdev); if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) { set_bit(REL_HWHEEL, *bit); set_bit(REL_HWHEEL_HI_RES, *bit); } if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) return -1; return 0; } static int a4_event(struct hid_device *hdev, struct hid_field *field, struct hid_usage *usage, __s32 value) { struct a4tech_sc *a4 = hid_get_drvdata(hdev); struct input_dev *input; if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput) return 0; input = field->hidinput->input; if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) { if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) { a4->delayed_value = value; return 1; } if (usage->hid == A4_WHEEL_ORIENTATION) { input_event(input, EV_REL, value ? REL_HWHEEL : REL_WHEEL, a4->delayed_value); input_event(input, EV_REL, value ? REL_HWHEEL_HI_RES : REL_WHEEL_HI_RES, a4->delayed_value * 120); return 1; } } if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) { a4->hw_wheel = !!value; return 1; } if (usage->code == REL_WHEEL_HI_RES && a4->hw_wheel) { input_event(input, usage->type, REL_HWHEEL, value); input_event(input, usage->type, REL_HWHEEL_HI_RES, value * 120); return 1; } return 0; } static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id) { struct a4tech_sc *a4; int ret; a4 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL); if (a4 == NULL) { hid_err(hdev, "can't alloc device descriptor\n"); return -ENOMEM; } a4->quirks = id->driver_data; hid_set_drvdata(hdev, a4); ret = hid_parse(hdev); if (ret) { hid_err(hdev, "parse failed\n"); return ret; } ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); if (ret) { hid_err(hdev, "hw start failed\n"); return ret; } return 0; } static const struct hid_device_id a4_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU), .driver_data = A4_2WHEEL_MOUSE_HACK_7 }, { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D), .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649), .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, { } }; MODULE_DEVICE_TABLE(hid, a4_devices); static struct hid_driver a4_driver = { .name = "a4tech", .id_table = a4_devices, .input_mapping = a4_input_mapping, .input_mapped = a4_input_mapped, .event = a4_event, .probe = a4_probe, }; module_hid_driver(a4_driver); MODULE_LICENSE("GPL"); |