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
26static 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
48static 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))
59static 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
91static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc,
92		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
113static 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
136static 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};
143MODULE_DEVICE_TABLE(hid, ch_devices);
144
145static 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};
153module_hid_driver(ch_driver);
154
155MODULE_LICENSE("GPL");
156