1/* 2 * HID driver for some cherry "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 */ 11 12/* 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms of the GNU General Public License as published by the Free 15 * Software Foundation; either version 2 of the License, or (at your option) 16 * any later version. 17 */ 18 19#include <linux/device.h> 20#include <linux/hid.h> 21#include <linux/module.h> 22 23#include "hid-ids.h" 24 25/* 26 * Cherry Cymotion keyboard have an invalid HID report descriptor, 27 * that needs fixing before we can parse it. 28 */ 29static void ch_report_fixup(struct hid_device *hdev, __u8 *rdesc, 30 unsigned int rsize) 31{ 32 if (rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) { 33 dev_info(&hdev->dev, "fixing up Cherry Cymotion report " 34 "descriptor\n"); 35 rdesc[11] = rdesc[16] = 0xff; 36 rdesc[12] = rdesc[17] = 0x03; 37 } 38} 39 40#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \ 41 EV_KEY, (c)) 42static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi, 43 struct hid_field *field, struct hid_usage *usage, 44 unsigned long **bit, int *max) 45{ 46 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) 47 return 0; 48 49 switch (usage->hid & HID_USAGE) { 50 case 0x301: ch_map_key_clear(KEY_PROG1); break; 51 case 0x302: ch_map_key_clear(KEY_PROG2); break; 52 case 0x303: ch_map_key_clear(KEY_PROG3); break; 53 default: 54 return 0; 55 } 56 57 return 1; 58} 59 60static const struct hid_device_id ch_devices[] = { 61 { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) }, 62 { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) }, 63 { } 64}; 65MODULE_DEVICE_TABLE(hid, ch_devices); 66 67static struct hid_driver ch_driver = { 68 .name = "cherry", 69 .id_table = ch_devices, 70 .report_fixup = ch_report_fixup, 71 .input_mapping = ch_input_mapping, 72}; 73 74static int __init ch_init(void) 75{ 76 return hid_register_driver(&ch_driver); 77} 78 79static void __exit ch_exit(void) 80{ 81 hid_unregister_driver(&ch_driver); 82} 83 84module_init(ch_init); 85module_exit(ch_exit); 86MODULE_LICENSE("GPL"); 87