1 /* 2 * HID driver for some ntrig "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) 2007 Paul Walmsley 9 * Copyright (c) 2008 Jiri Slaby 10 * Copyright (c) 2008 Rafi Rubin 11 * 12 */ 13 14 /* 15 * This program is free software; you can redistribute it and/or modify it 16 * under the terms of the GNU General Public License as published by the Free 17 * Software Foundation; either version 2 of the License, or (at your option) 18 * any later version. 19 */ 20 21 #include <linux/device.h> 22 #include <linux/hid.h> 23 #include <linux/module.h> 24 25 #include "hid-ids.h" 26 27 #define NTRIG_DUPLICATE_USAGES 0x001 28 29 #define nt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \ 30 EV_KEY, (c)) 31 32 static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi, 33 struct hid_field *field, struct hid_usage *usage, 34 unsigned long **bit, int *max) 35 { 36 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_DIGITIZER && 37 (usage->hid & 0xff) == 0x47) { 38 nt_map_key_clear(BTN_TOOL_DOUBLETAP); 39 return 1; 40 } 41 return 0; 42 } 43 44 static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi, 45 struct hid_field *field, struct hid_usage *usage, 46 unsigned long **bit, int *max) 47 { 48 if (usage->type == EV_KEY || usage->type == EV_REL 49 || usage->type == EV_ABS) 50 clear_bit(usage->code, *bit); 51 52 return 0; 53 } 54 static const struct hid_device_id ntrig_devices[] = { 55 { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN), 56 .driver_data = NTRIG_DUPLICATE_USAGES }, 57 { } 58 }; 59 MODULE_DEVICE_TABLE(hid, ntrig_devices); 60 61 static struct hid_driver ntrig_driver = { 62 .name = "ntrig", 63 .id_table = ntrig_devices, 64 .input_mapping = ntrig_input_mapping, 65 .input_mapped = ntrig_input_mapped, 66 }; 67 68 static int ntrig_init(void) 69 { 70 return hid_register_driver(&ntrig_driver); 71 } 72 73 static void ntrig_exit(void) 74 { 75 hid_unregister_driver(&ntrig_driver); 76 } 77 78 module_init(ntrig_init); 79 module_exit(ntrig_exit); 80 MODULE_LICENSE("GPL"); 81