1 /* 2 * HID driver for some ezkey "special" devices 3 * 4 * Copyright (c) 1999 Andreas Gal 5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> 6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc 7 * Copyright (c) 2006-2007 Jiri Kosina 8 * Copyright (c) 2008 Jiri Slaby 9 */ 10 11 /* 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the Free 14 * Software Foundation; either version 2 of the License, or (at your option) 15 * any later version. 16 */ 17 18 #include <linux/device.h> 19 #include <linux/input.h> 20 #include <linux/hid.h> 21 #include <linux/module.h> 22 23 #include "hid-ids.h" 24 25 #define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c)) 26 #define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c)) 27 28 static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi, 29 struct hid_field *field, struct hid_usage *usage, 30 unsigned long **bit, int *max) 31 { 32 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) 33 return 0; 34 35 switch (usage->hid & HID_USAGE) { 36 case 0x230: ez_map_key(BTN_MOUSE); break; 37 case 0x231: ez_map_rel(REL_WHEEL); break; 38 /* 39 * this keyboard has a scrollwheel implemented in 40 * totally broken way. We map this usage temporarily 41 * to HWHEEL and handle it in the event quirk handler 42 */ 43 case 0x232: ez_map_rel(REL_HWHEEL); break; 44 default: 45 return 0; 46 } 47 return 1; 48 } 49 50 static int ez_event(struct hid_device *hdev, struct hid_field *field, 51 struct hid_usage *usage, __s32 value) 52 { 53 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || 54 !usage->type) 55 return 0; 56 57 /* handle the temporary quirky mapping to HWHEEL */ 58 if (usage->type == EV_REL && usage->code == REL_HWHEEL) { 59 struct input_dev *input = field->hidinput->input; 60 input_event(input, usage->type, REL_WHEEL, -value); 61 return 1; 62 } 63 64 return 0; 65 } 66 67 static const struct hid_device_id ez_devices[] = { 68 { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) }, 69 { } 70 }; 71 MODULE_DEVICE_TABLE(hid, ez_devices); 72 73 static struct hid_driver ez_driver = { 74 .name = "ezkey", 75 .id_table = ez_devices, 76 .input_mapping = ez_input_mapping, 77 .event = ez_event, 78 }; 79 module_hid_driver(ez_driver); 80 81 MODULE_LICENSE("GPL"); 82