Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 * HID driver for some ITE "special" devices
 * Copyright (c) 2017 Hans de Goede <hdegoede@redhat.com>
 */
 
#include <linux/device.h>
#include <linux/input.h>
#include <linux/hid.h>
#include <linux/module.h>
 
#include "hid-ids.h"
 
#define QUIRK_TOUCHPAD_ON_OFF_REPORT		BIT(0)
 
static __u8 *ite_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize)
{
<------>unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
 
<------>if (quirks & QUIRK_TOUCHPAD_ON_OFF_REPORT) {
<------><------>if (*rsize == 188 && rdesc[162] == 0x81 && rdesc[163] == 0x02) {
<------><------><------>hid_info(hdev, "Fixing up ITE keyboard report descriptor\n");
<------><------><------>rdesc[163] = HID_MAIN_ITEM_RELATIVE;
<------><------>}
<------>}
 
<------>return rdesc;
}
 
static int ite_input_mapping(struct hid_device *hdev,
<------><------>struct hid_input *hi, struct hid_field *field,
<------><------>struct hid_usage *usage, unsigned long **bit,
<------><------>int *max)
{
 
<------>unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
 
<------>if ((quirks & QUIRK_TOUCHPAD_ON_OFF_REPORT) &&
<------>    (usage->hid & HID_USAGE_PAGE) == 0x00880000) {
<------><------>if (usage->hid == 0x00880078) {
<------><------><------>/* Touchpad on, userspace expects F22 for this */
<------><------><------>hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_F22);
<------><------><------>return 1;
<------><------>}
<------><------>if (usage->hid == 0x00880079) {
<------><------><------>/* Touchpad off, userspace expects F23 for this */
<------><------><------>hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_F23);
<------><------><------>return 1;
<------><------>}
<------><------>return -1;
<------>}
 
<------>return 0;
}
 
static int ite_event(struct hid_device *hdev, struct hid_field *field,
<------><------>     struct hid_usage *usage, __s32 value)
{
<------>struct input_dev *input;
 
<------>if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)
<------><------>return 0;
 
<------>input = field->hidinput->input;
 
<------>/*
<------> * The ITE8595 always reports 0 as value for the rfkill button. Luckily
<------> * it is the only button in its report, and it sends a report on
<------> * release only, so receiving a report means the button was pressed.
<------> */
<------>if (usage->hid == HID_GD_RFKILL_BTN) {
<------><------>input_event(input, EV_KEY, KEY_RFKILL, 1);
<------><------>input_sync(input);
<------><------>input_event(input, EV_KEY, KEY_RFKILL, 0);
<------><------>input_sync(input);
<------><------>return 1;
<------>}
 
<------>return 0;
}
 
static int ite_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
<------>int ret;
 
<------>hid_set_drvdata(hdev, (void *)id->driver_data);
 
<------>ret = hid_open_report(hdev);
<------>if (ret)
<------><------>return ret;
 
<------>return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
}
 
static const struct hid_device_id ite_devices[] = {
<------>{ HID_USB_DEVICE(USB_VENDOR_ID_ITE, USB_DEVICE_ID_ITE8595) },
<------>{ HID_USB_DEVICE(USB_VENDOR_ID_258A, USB_DEVICE_ID_258A_6A88) },
<------>/* ITE8595 USB kbd ctlr, with Synaptics touchpad connected to it. */
<------>{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
<------><------>     USB_VENDOR_ID_SYNAPTICS,
<------><------>     USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5_012),
<------>  .driver_data = QUIRK_TOUCHPAD_ON_OFF_REPORT },
<------>/* ITE8910 USB kbd ctlr, with Synaptics touchpad connected to it. */
<------>{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
<------><------>     USB_VENDOR_ID_SYNAPTICS,
<------><------>     USB_DEVICE_ID_SYNAPTICS_ACER_ONE_S1003) },
<------>{ }
};
MODULE_DEVICE_TABLE(hid, ite_devices);
 
static struct hid_driver ite_driver = {
<------>.name = "itetech",
<------>.id_table = ite_devices,
<------>.probe = ite_probe,
<------>.report_fixup = ite_report_fixup,
<------>.input_mapping = ite_input_mapping,
<------>.event = ite_event,
};
module_hid_driver(ite_driver);
 
MODULE_LICENSE("GPL");