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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * HID driver for some cherry "special" devices4 *5 * Copyright (c) 1999 Andreas Gal6 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>7 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc8 * Copyright (c) 2006-2007 Jiri Kosina9 * Copyright (c) 2008 Jiri Slaby10 */11 12/*13 */14 15#include <linux/device.h>16#include <linux/hid.h>17#include <linux/module.h>18 19#include "hid-ids.h"20 21/*22 * Cherry Cymotion keyboard have an invalid HID report descriptor,23 * that needs fixing before we can parse it.24 */25static const __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,26 unsigned int *rsize)27{28 if (*rsize >= 18 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {29 hid_info(hdev, "fixing up Cherry Cymotion report descriptor\n");30 rdesc[11] = rdesc[16] = 0xff;31 rdesc[12] = rdesc[17] = 0x03;32 }33 return rdesc;34}35 36#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \37 EV_KEY, (c))38static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,39 struct hid_field *field, struct hid_usage *usage,40 unsigned long **bit, int *max)41{42 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)43 return 0;44 45 switch (usage->hid & HID_USAGE) {46 case 0x301: ch_map_key_clear(KEY_PROG1); break;47 case 0x302: ch_map_key_clear(KEY_PROG2); break;48 case 0x303: ch_map_key_clear(KEY_PROG3); break;49 default:50 return 0;51 }52 53 return 1;54}55 56static const struct hid_device_id ch_devices[] = {57 { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },58 { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },59 { }60};61MODULE_DEVICE_TABLE(hid, ch_devices);62 63static struct hid_driver ch_driver = {64 .name = "cherry",65 .id_table = ch_devices,66 .report_fixup = ch_report_fixup,67 .input_mapping = ch_input_mapping,68};69module_hid_driver(ch_driver);70 71MODULE_DESCRIPTION("HID driver for some cherry \"special\" devices");72MODULE_LICENSE("GPL");73