1/*
2 * HID driver for some chicony "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/input.h>
21#include <linux/hid.h>
22#include <linux/module.h>
23#include <linux/usb.h>
24
25#include "hid-ids.h"
26
27#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
28 EV_KEY, (c))
29static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
30 struct hid_field *field, struct hid_usage *usage,
31 unsigned long **bit, int *max)
32{
33 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
34 return 0;
35
36 set_bit(EV_REP, hi->input->evbit);
37 switch (usage->hid & HID_USAGE) {
38 case 0xff01: ch_map_key_clear(BTN_1); break;
39 case 0xff02: ch_map_key_clear(BTN_2); break;
40 case 0xff03: ch_map_key_clear(BTN_3); break;
41 case 0xff04: ch_map_key_clear(BTN_4); break;
42 case 0xff05: ch_map_key_clear(BTN_5); break;
43 case 0xff06: ch_map_key_clear(BTN_6); break;
44 case 0xff07: ch_map_key_clear(BTN_7); break;
45 case 0xff08: ch_map_key_clear(BTN_8); break;
46 case 0xff09: ch_map_key_clear(BTN_9); break;
47 case 0xff0a: ch_map_key_clear(BTN_A); break;
48 case 0xff0b: ch_map_key_clear(BTN_B); break;
49 case 0x00f1: ch_map_key_clear(KEY_WLAN); break;
50 case 0x00f2: ch_map_key_clear(KEY_BRIGHTNESSDOWN); break;
51 case 0x00f3: ch_map_key_clear(KEY_BRIGHTNESSUP); break;
52 case 0x00f4: ch_map_key_clear(KEY_DISPLAY_OFF); break;
53 case 0x00f7: ch_map_key_clear(KEY_CAMERA); break;
54 case 0x00f8: ch_map_key_clear(KEY_PROG1); break;
55 default:
56 return 0;
57 }
58 return 1;
59}
60
61static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc,
62 unsigned int *rsize)
63{
64 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
65
66 if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
67 /* Change usage maximum and logical maximum from 0x7fff to
68 * 0x2fff, so they don't exceed HID_MAX_USAGES */
69 switch (hdev->product) {
70 case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:
71 if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f
72 && rdesc[69] == 0xff && rdesc[70] == 0x7f) {
73 hid_info(hdev, "Fixing up report descriptor\n");
74 rdesc[65] = rdesc[70] = 0x2f;
75 }
76 break;
77 }
78
79 }
80 return rdesc;
81}
82
83
84static const struct hid_device_id ch_devices[] = {
85 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
86 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
87 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
88 { }
89};
90MODULE_DEVICE_TABLE(hid, ch_devices);
91
92static struct hid_driver ch_driver = {
93 .name = "chicony",
94 .id_table = ch_devices,
95 .report_fixup = ch_switch12_report_fixup,
96 .input_mapping = ch_input_mapping,
97};
98module_hid_driver(ch_driver);
99
100MODULE_LICENSE("GPL");
101