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