1 // SPDX-License-Identifier: GPL-2.0-only
3 * HID driver for some ITE "special" devices
4 * Copyright (c) 2017 Hans de Goede <hdegoede@redhat.com>
7 #include <linux/device.h>
8 #include <linux/input.h>
10 #include <linux/module.h>
14 #define QUIRK_TOUCHPAD_ON_OFF_REPORT BIT(0)
16 static __u8 *ite_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize)
18 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
20 if (quirks & QUIRK_TOUCHPAD_ON_OFF_REPORT) {
21 /* For Acer Aspire Switch 10 SW5-012 keyboard-dock */
22 if (*rsize == 188 && rdesc[162] == 0x81 && rdesc[163] == 0x02) {
23 hid_info(hdev, "Fixing up Acer Sw5-012 ITE keyboard report descriptor\n");
24 rdesc[163] = HID_MAIN_ITEM_RELATIVE;
26 /* For Acer One S1002 keyboard-dock */
27 if (*rsize == 188 && rdesc[185] == 0x81 && rdesc[186] == 0x02) {
28 hid_info(hdev, "Fixing up Acer S1002 ITE keyboard report descriptor\n");
29 rdesc[186] = HID_MAIN_ITEM_RELATIVE;
36 static int ite_input_mapping(struct hid_device *hdev,
37 struct hid_input *hi, struct hid_field *field,
38 struct hid_usage *usage, unsigned long **bit,
42 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
44 if ((quirks & QUIRK_TOUCHPAD_ON_OFF_REPORT) &&
45 (usage->hid & HID_USAGE_PAGE) == 0x00880000) {
46 if (usage->hid == 0x00880078) {
47 /* Touchpad on, userspace expects F22 for this */
48 hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_F22);
51 if (usage->hid == 0x00880079) {
52 /* Touchpad off, userspace expects F23 for this */
53 hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_F23);
62 static int ite_event(struct hid_device *hdev, struct hid_field *field,
63 struct hid_usage *usage, __s32 value)
65 struct input_dev *input;
67 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)
70 input = field->hidinput->input;
73 * The ITE8595 always reports 0 as value for the rfkill button. Luckily
74 * it is the only button in its report, and it sends a report on
75 * release only, so receiving a report means the button was pressed.
77 if (usage->hid == HID_GD_RFKILL_BTN) {
78 input_event(input, EV_KEY, KEY_RFKILL, 1);
80 input_event(input, EV_KEY, KEY_RFKILL, 0);
88 static int ite_probe(struct hid_device *hdev, const struct hid_device_id *id)
92 hid_set_drvdata(hdev, (void *)id->driver_data);
94 ret = hid_open_report(hdev);
98 return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
101 static const struct hid_device_id ite_devices[] = {
102 { HID_USB_DEVICE(USB_VENDOR_ID_ITE, USB_DEVICE_ID_ITE8595) },
103 { HID_USB_DEVICE(USB_VENDOR_ID_258A, USB_DEVICE_ID_258A_6A88) },
104 /* ITE8595 USB kbd ctlr, with Synaptics touchpad connected to it. */
105 { HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
106 USB_VENDOR_ID_SYNAPTICS,
107 USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5_012),
108 .driver_data = QUIRK_TOUCHPAD_ON_OFF_REPORT },
109 /* ITE8910 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_ONE_S1002),
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_S1003) },
120 MODULE_DEVICE_TABLE(hid, ite_devices);
122 static struct hid_driver ite_driver = {
124 .id_table = ite_devices,
126 .report_fixup = ite_report_fixup,
127 .input_mapping = ite_input_mapping,
130 module_hid_driver(ite_driver);
132 MODULE_LICENSE("GPL");