| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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| 2 | /* |
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| 3 | * HID driver for some ezkey "special" devices |
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| 4 | * |
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| 5 | * Copyright (c) 1999 Andreas Gal |
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| 6 | * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> |
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| 7 | * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc |
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| 8 | * Copyright (c) 2006-2007 Jiri Kosina |
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| 9 | * Copyright (c) 2008 Jiri Slaby |
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| 10 | */ |
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| 11 | |
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| 12 | /* |
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| 13 | */ |
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| 14 | |
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| 15 | #include <linux/device.h> |
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| 16 | #include <linux/input.h> |
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| 17 | #include <linux/hid.h> |
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| 18 | #include <linux/module.h> |
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| 19 | |
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| 20 | #include "hid-ids.h" |
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| 21 | |
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| 22 | #define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c)) |
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| 23 | #define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c)) |
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| 24 | |
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| 25 | static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
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| 26 | struct hid_field *field, struct hid_usage *usage, |
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| 27 | unsigned long **bit, int *max) |
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| 28 | { |
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| 29 | if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) |
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| 30 | return 0; |
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| 31 | |
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| 32 | switch (usage->hid & HID_USAGE) { |
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| 33 | case 0x230: ez_map_key(BTN_MOUSE); break; |
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| 34 | case 0x231: ez_map_rel(REL_WHEEL); break; |
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| 35 | /* |
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| 36 | * this keyboard has a scrollwheel implemented in |
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| 37 | * totally broken way. We map this usage temporarily |
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| 38 | * to HWHEEL and handle it in the event quirk handler |
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| 39 | */ |
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| 40 | case 0x232: ez_map_rel(REL_HWHEEL); break; |
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| 41 | default: |
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| 42 | return 0; |
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| 43 | } |
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| 44 | return 1; |
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| 45 | } |
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| 46 | |
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| 47 | static int ez_event(struct hid_device *hdev, struct hid_field *field, |
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| 48 | struct hid_usage *usage, __s32 value) |
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| 49 | { |
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| 50 | if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || |
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| 51 | !usage->type) |
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| 52 | return 0; |
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| 53 | |
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| 54 | /* handle the temporary quirky mapping to HWHEEL */ |
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| 55 | if (usage->type == EV_REL && usage->code == REL_HWHEEL) { |
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| 56 | struct input_dev *input = field->hidinput->input; |
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| 57 | input_event(dev: input, type: usage->type, REL_WHEEL, value: -value); |
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| 58 | return 1; |
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| 59 | } |
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| 60 | |
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| 61 | return 0; |
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| 62 | } |
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| 63 | |
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| 64 | static const struct hid_device_id ez_devices[] = { |
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| 65 | { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) }, |
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| 66 | { } |
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| 67 | }; |
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| 68 | MODULE_DEVICE_TABLE(hid, ez_devices); |
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| 69 | |
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| 70 | static struct hid_driver ez_driver = { |
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| 71 | .name = "ezkey" , |
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| 72 | .id_table = ez_devices, |
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| 73 | .input_mapping = ez_input_mapping, |
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| 74 | .event = ez_event, |
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| 75 | }; |
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| 76 | module_hid_driver(ez_driver); |
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| 77 | |
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| 78 | MODULE_LICENSE("GPL" ); |
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| 79 | |
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