1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * HID driver for some chicony "special" devices
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 1999 Andreas Gal
6*4882a593Smuzhiyun * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
7*4882a593Smuzhiyun * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
8*4882a593Smuzhiyun * Copyright (c) 2006-2007 Jiri Kosina
9*4882a593Smuzhiyun * Copyright (c) 2007 Paul Walmsley
10*4882a593Smuzhiyun * Copyright (c) 2008 Jiri Slaby
11*4882a593Smuzhiyun */
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun /*
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <linux/device.h>
17*4882a593Smuzhiyun #include <linux/input.h>
18*4882a593Smuzhiyun #include <linux/hid.h>
19*4882a593Smuzhiyun #include <linux/module.h>
20*4882a593Smuzhiyun #include <linux/usb.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #include "hid-ids.h"
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
25*4882a593Smuzhiyun EV_KEY, (c))
ch_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)26*4882a593Smuzhiyun static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
27*4882a593Smuzhiyun struct hid_field *field, struct hid_usage *usage,
28*4882a593Smuzhiyun unsigned long **bit, int *max)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
31*4882a593Smuzhiyun return 0;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun set_bit(EV_REP, hi->input->evbit);
34*4882a593Smuzhiyun switch (usage->hid & HID_USAGE) {
35*4882a593Smuzhiyun case 0xff01: ch_map_key_clear(BTN_1); break;
36*4882a593Smuzhiyun case 0xff02: ch_map_key_clear(BTN_2); break;
37*4882a593Smuzhiyun case 0xff03: ch_map_key_clear(BTN_3); break;
38*4882a593Smuzhiyun case 0xff04: ch_map_key_clear(BTN_4); break;
39*4882a593Smuzhiyun case 0xff05: ch_map_key_clear(BTN_5); break;
40*4882a593Smuzhiyun case 0xff06: ch_map_key_clear(BTN_6); break;
41*4882a593Smuzhiyun case 0xff07: ch_map_key_clear(BTN_7); break;
42*4882a593Smuzhiyun case 0xff08: ch_map_key_clear(BTN_8); break;
43*4882a593Smuzhiyun case 0xff09: ch_map_key_clear(BTN_9); break;
44*4882a593Smuzhiyun case 0xff0a: ch_map_key_clear(BTN_A); break;
45*4882a593Smuzhiyun case 0xff0b: ch_map_key_clear(BTN_B); break;
46*4882a593Smuzhiyun case 0x00f1: ch_map_key_clear(KEY_WLAN); break;
47*4882a593Smuzhiyun case 0x00f2: ch_map_key_clear(KEY_BRIGHTNESSDOWN); break;
48*4882a593Smuzhiyun case 0x00f3: ch_map_key_clear(KEY_BRIGHTNESSUP); break;
49*4882a593Smuzhiyun case 0x00f4: ch_map_key_clear(KEY_DISPLAY_OFF); break;
50*4882a593Smuzhiyun case 0x00f7: ch_map_key_clear(KEY_CAMERA); break;
51*4882a593Smuzhiyun case 0x00f8: ch_map_key_clear(KEY_PROG1); break;
52*4882a593Smuzhiyun default:
53*4882a593Smuzhiyun return 0;
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun return 1;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
ch_switch12_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)58*4882a593Smuzhiyun static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc,
59*4882a593Smuzhiyun unsigned int *rsize)
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun struct usb_interface *intf;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun if (!hid_is_usb(hdev))
64*4882a593Smuzhiyun return rdesc;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun intf = to_usb_interface(hdev->dev.parent);
67*4882a593Smuzhiyun if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
68*4882a593Smuzhiyun /* Change usage maximum and logical maximum from 0x7fff to
69*4882a593Smuzhiyun * 0x2fff, so they don't exceed HID_MAX_USAGES */
70*4882a593Smuzhiyun switch (hdev->product) {
71*4882a593Smuzhiyun case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:
72*4882a593Smuzhiyun if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f
73*4882a593Smuzhiyun && rdesc[69] == 0xff && rdesc[70] == 0x7f) {
74*4882a593Smuzhiyun hid_info(hdev, "Fixing up report descriptor\n");
75*4882a593Smuzhiyun rdesc[65] = rdesc[70] = 0x2f;
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun break;
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun return rdesc;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun static const struct hid_device_id ch_devices[] = {
86*4882a593Smuzhiyun { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
87*4882a593Smuzhiyun { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
88*4882a593Smuzhiyun { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
89*4882a593Smuzhiyun { }
90*4882a593Smuzhiyun };
91*4882a593Smuzhiyun MODULE_DEVICE_TABLE(hid, ch_devices);
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun static struct hid_driver ch_driver = {
94*4882a593Smuzhiyun .name = "chicony",
95*4882a593Smuzhiyun .id_table = ch_devices,
96*4882a593Smuzhiyun .report_fixup = ch_switch12_report_fixup,
97*4882a593Smuzhiyun .input_mapping = ch_input_mapping,
98*4882a593Smuzhiyun };
99*4882a593Smuzhiyun module_hid_driver(ch_driver);
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun MODULE_LICENSE("GPL");
102