1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * HID driver for some chicony "special" devices
4 *
5 * Copyright (c) 1999 Andreas Gal
6 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
7 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
8 * Copyright (c) 2006-2007 Jiri Kosina
9 * Copyright (c) 2007 Paul Walmsley
10 * Copyright (c) 2008 Jiri Slaby
11 */
12
13 /*
14 */
15
16 #include <linux/device.h>
17 #include <linux/input.h>
18 #include <linux/hid.h>
19 #include <linux/module.h>
20 #include <linux/usb.h>
21
22 #include "hid-ids.h"
23
24 #define CH_WIRELESS_CTL_REPORT_ID 0x11
25
ch_report_wireless(struct hid_report * report,u8 * data,int size)26 static int ch_report_wireless(struct hid_report *report, u8 *data, int size)
27 {
28 struct hid_device *hdev = report->device;
29 struct input_dev *input;
30
31 if (report->id != CH_WIRELESS_CTL_REPORT_ID || report->maxfield != 1)
32 return 0;
33
34 input = report->field[0]->hidinput->input;
35 if (!input) {
36 hid_warn(hdev, "can't find wireless radio control's input");
37 return 0;
38 }
39
40 input_report_key(input, KEY_RFKILL, 1);
41 input_sync(input);
42 input_report_key(input, KEY_RFKILL, 0);
43 input_sync(input);
44
45 return 1;
46 }
47
ch_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)48 static int ch_raw_event(struct hid_device *hdev,
49 struct hid_report *report, u8 *data, int size)
50 {
51 if (report->application == HID_GD_WIRELESS_RADIO_CTLS)
52 return ch_report_wireless(report, data, size);
53
54 return 0;
55 }
56
57 #define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
58 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)59 static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
60 struct hid_field *field, struct hid_usage *usage,
61 unsigned long **bit, int *max)
62 {
63 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
64 return 0;
65
66 set_bit(EV_REP, hi->input->evbit);
67 switch (usage->hid & HID_USAGE) {
68 case 0xff01: ch_map_key_clear(BTN_1); break;
69 case 0xff02: ch_map_key_clear(BTN_2); break;
70 case 0xff03: ch_map_key_clear(BTN_3); break;
71 case 0xff04: ch_map_key_clear(BTN_4); break;
72 case 0xff05: ch_map_key_clear(BTN_5); break;
73 case 0xff06: ch_map_key_clear(BTN_6); break;
74 case 0xff07: ch_map_key_clear(BTN_7); break;
75 case 0xff08: ch_map_key_clear(BTN_8); break;
76 case 0xff09: ch_map_key_clear(BTN_9); break;
77 case 0xff0a: ch_map_key_clear(BTN_A); break;
78 case 0xff0b: ch_map_key_clear(BTN_B); break;
79 case 0x00f1: ch_map_key_clear(KEY_WLAN); break;
80 case 0x00f2: ch_map_key_clear(KEY_BRIGHTNESSDOWN); break;
81 case 0x00f3: ch_map_key_clear(KEY_BRIGHTNESSUP); break;
82 case 0x00f4: ch_map_key_clear(KEY_DISPLAY_OFF); break;
83 case 0x00f7: ch_map_key_clear(KEY_CAMERA); break;
84 case 0x00f8: ch_map_key_clear(KEY_PROG1); break;
85 default:
86 return 0;
87 }
88 return 1;
89 }
90
ch_switch12_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)91 static const __u8 *ch_switch12_report_fixup(struct hid_device *hdev,
92 __u8 *rdesc, unsigned int *rsize)
93 {
94 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
95
96 if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
97 /* Change usage maximum and logical maximum from 0x7fff to
98 * 0x2fff, so they don't exceed HID_MAX_USAGES */
99 switch (hdev->product) {
100 case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:
101 if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f
102 && rdesc[69] == 0xff && rdesc[70] == 0x7f) {
103 hid_info(hdev, "Fixing up report descriptor\n");
104 rdesc[65] = rdesc[70] = 0x2f;
105 }
106 break;
107 }
108
109 }
110 return rdesc;
111 }
112
ch_probe(struct hid_device * hdev,const struct hid_device_id * id)113 static int ch_probe(struct hid_device *hdev, const struct hid_device_id *id)
114 {
115 int ret;
116
117 if (!hid_is_usb(hdev))
118 return -EINVAL;
119
120 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
121 ret = hid_parse(hdev);
122 if (ret) {
123 hid_err(hdev, "Chicony hid parse failed: %d\n", ret);
124 return ret;
125 }
126
127 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
128 if (ret) {
129 hid_err(hdev, "Chicony hw start failed: %d\n", ret);
130 return ret;
131 }
132
133 return 0;
134 }
135
136 static const struct hid_device_id ch_devices[] = {
137 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
138 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
139 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS3) },
140 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
141 { }
142 };
143 MODULE_DEVICE_TABLE(hid, ch_devices);
144
145 static struct hid_driver ch_driver = {
146 .name = "chicony",
147 .id_table = ch_devices,
148 .report_fixup = ch_switch12_report_fixup,
149 .input_mapping = ch_input_mapping,
150 .probe = ch_probe,
151 .raw_event = ch_raw_event,
152 };
153 module_hid_driver(ch_driver);
154
155 MODULE_DESCRIPTION("HID driver for some chicony \"special\" devices");
156 MODULE_LICENSE("GPL");
157