Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0-only
2 : /*
3 : * HID driver for some ITE "special" devices
4 : * Copyright (c) 2017 Hans de Goede <hdegoede@redhat.com>
5 : */
6 :
7 : #include <linux/device.h>
8 : #include <linux/input.h>
9 : #include <linux/hid.h>
10 : #include <linux/module.h>
11 :
12 : #include "hid-ids.h"
13 :
14 : #define QUIRK_TOUCHPAD_ON_OFF_REPORT BIT(0)
15 :
16 0 : static __u8 *ite_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize)
17 : {
18 0 : unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
19 :
20 0 : if (quirks & QUIRK_TOUCHPAD_ON_OFF_REPORT) {
21 : /* For Acer Aspire Switch 10 SW5-012 keyboard-dock */
22 0 : if (*rsize == 188 && rdesc[162] == 0x81 && rdesc[163] == 0x02) {
23 0 : hid_info(hdev, "Fixing up Acer Sw5-012 ITE keyboard report descriptor\n");
24 0 : rdesc[163] = HID_MAIN_ITEM_RELATIVE;
25 : }
26 : /* For Acer One S1002/S1003 keyboard-dock */
27 0 : if (*rsize == 188 && rdesc[185] == 0x81 && rdesc[186] == 0x02) {
28 0 : hid_info(hdev, "Fixing up Acer S1002/S1003 ITE keyboard report descriptor\n");
29 0 : rdesc[186] = HID_MAIN_ITEM_RELATIVE;
30 : }
31 : /* For Acer Aspire Switch 10E (SW3-016) keyboard-dock */
32 0 : if (*rsize == 210 && rdesc[184] == 0x81 && rdesc[185] == 0x02) {
33 0 : hid_info(hdev, "Fixing up Acer Aspire Switch 10E (SW3-016) ITE keyboard report descriptor\n");
34 0 : rdesc[185] = HID_MAIN_ITEM_RELATIVE;
35 : }
36 : }
37 :
38 0 : return rdesc;
39 : }
40 :
41 0 : static int ite_input_mapping(struct hid_device *hdev,
42 : struct hid_input *hi, struct hid_field *field,
43 : struct hid_usage *usage, unsigned long **bit,
44 : int *max)
45 : {
46 :
47 0 : unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
48 :
49 0 : if ((quirks & QUIRK_TOUCHPAD_ON_OFF_REPORT) &&
50 0 : (usage->hid & HID_USAGE_PAGE) == 0x00880000) {
51 0 : if (usage->hid == 0x00880078) {
52 : /* Touchpad on, userspace expects F22 for this */
53 0 : hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_F22);
54 0 : return 1;
55 : }
56 0 : if (usage->hid == 0x00880079) {
57 : /* Touchpad off, userspace expects F23 for this */
58 0 : hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_F23);
59 0 : return 1;
60 : }
61 : return -1;
62 : }
63 :
64 : return 0;
65 : }
66 :
67 0 : static int ite_event(struct hid_device *hdev, struct hid_field *field,
68 : struct hid_usage *usage, __s32 value)
69 : {
70 : struct input_dev *input;
71 :
72 0 : if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)
73 : return 0;
74 :
75 0 : input = field->hidinput->input;
76 :
77 : /*
78 : * The ITE8595 always reports 0 as value for the rfkill button. Luckily
79 : * it is the only button in its report, and it sends a report on
80 : * release only, so receiving a report means the button was pressed.
81 : */
82 0 : if (usage->hid == HID_GD_RFKILL_BTN) {
83 0 : input_event(input, EV_KEY, KEY_RFKILL, 1);
84 0 : input_sync(input);
85 0 : input_event(input, EV_KEY, KEY_RFKILL, 0);
86 0 : input_sync(input);
87 0 : return 1;
88 : }
89 :
90 : return 0;
91 : }
92 :
93 0 : static int ite_probe(struct hid_device *hdev, const struct hid_device_id *id)
94 : {
95 : int ret;
96 :
97 0 : hid_set_drvdata(hdev, (void *)id->driver_data);
98 :
99 0 : ret = hid_open_report(hdev);
100 0 : if (ret)
101 : return ret;
102 :
103 0 : return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
104 : }
105 :
106 : static const struct hid_device_id ite_devices[] = {
107 : { HID_USB_DEVICE(USB_VENDOR_ID_ITE, USB_DEVICE_ID_ITE8595) },
108 : { HID_USB_DEVICE(USB_VENDOR_ID_258A, USB_DEVICE_ID_258A_6A88) },
109 : /* ITE8595 USB kbd ctlr, with Synaptics touchpad connected to it. */
110 : { HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
111 : USB_VENDOR_ID_SYNAPTICS,
112 : USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5_012),
113 : .driver_data = QUIRK_TOUCHPAD_ON_OFF_REPORT },
114 : /* ITE8910 USB kbd ctlr, with Synaptics touchpad connected to it. */
115 : { HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
116 : USB_VENDOR_ID_SYNAPTICS,
117 : USB_DEVICE_ID_SYNAPTICS_ACER_ONE_S1002),
118 : .driver_data = QUIRK_TOUCHPAD_ON_OFF_REPORT },
119 : /* ITE8910 USB kbd ctlr, with Synaptics touchpad connected to it. */
120 : { HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
121 : USB_VENDOR_ID_SYNAPTICS,
122 : USB_DEVICE_ID_SYNAPTICS_ACER_ONE_S1003),
123 : .driver_data = QUIRK_TOUCHPAD_ON_OFF_REPORT },
124 : /* ITE8910 USB kbd ctlr, with Synaptics touchpad connected to it. */
125 : { HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
126 : USB_VENDOR_ID_SYNAPTICS,
127 : USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5_017),
128 : .driver_data = QUIRK_TOUCHPAD_ON_OFF_REPORT },
129 : { }
130 : };
131 : MODULE_DEVICE_TABLE(hid, ite_devices);
132 :
133 : static struct hid_driver ite_driver = {
134 : .name = "itetech",
135 : .id_table = ite_devices,
136 : .probe = ite_probe,
137 : .report_fixup = ite_report_fixup,
138 : .input_mapping = ite_input_mapping,
139 : .event = ite_event,
140 : };
141 1 : module_hid_driver(ite_driver);
142 :
143 : MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
144 : MODULE_LICENSE("GPL");
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