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) 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/hid.h> 20 #include <linux/module.h> 21 22 #include "hid-ids.h" 23 24 /* 25 * Cherry Cymotion keyboard have an invalid HID report descriptor, 26 * that needs fixing before we can parse it. 27 */ 28 static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc, 29 unsigned int *rsize) 30 { 31 if (*rsize >= 18 && rdesc[11] == 0x3c && rdesc[12] == 0x02) { 32 hid_info(hdev, "fixing up Cherry Cymotion report descriptor\n"); 33 rdesc[11] = rdesc[16] = 0xff; 34 rdesc[12] = rdesc[17] = 0x03; 35 } 36 return rdesc; 37 } 38 39 #define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \ 40 EV_KEY, (c)) 41 static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi, 42 struct hid_field *field, struct hid_usage *usage, 43 unsigned long **bit, int *max) 44 { 45 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) 46 return 0; 47 48 switch (usage->hid & HID_USAGE) { 49 case 0x301: ch_map_key_clear(KEY_PROG1); break; 50 case 0x302: ch_map_key_clear(KEY_PROG2); break; 51 case 0x303: ch_map_key_clear(KEY_PROG3); break; 52 default: 53 return 0; 54 } 55 56 return 1; 57 } 58 59 static const struct hid_device_id ch_devices[] = { 60 { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) }, 61 { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) }, 62 { } 63 }; 64 MODULE_DEVICE_TABLE(hid, ch_devices); 65 66 static struct hid_driver ch_driver = { 67 .name = "cherry", 68 .id_table = ch_devices, 69 .report_fixup = ch_report_fixup, 70 .input_mapping = ch_input_mapping, 71 }; 72 module_hid_driver(ch_driver); 73 74 MODULE_LICENSE("GPL"); 75