146 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * HID driver for some ITE "special" devices4 * 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 16static const __u8 *ite_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize)17{18 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);19 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;25 }26 /* For Acer One S1002/S1003 keyboard-dock */27 if (*rsize == 188 && rdesc[185] == 0x81 && rdesc[186] == 0x02) {28 hid_info(hdev, "Fixing up Acer S1002/S1003 ITE keyboard report descriptor\n");29 rdesc[186] = HID_MAIN_ITEM_RELATIVE;30 }31 /* For Acer Aspire Switch 10E (SW3-016) keyboard-dock */32 if (*rsize == 210 && rdesc[184] == 0x81 && rdesc[185] == 0x02) {33 hid_info(hdev, "Fixing up Acer Aspire Switch 10E (SW3-016) ITE keyboard report descriptor\n");34 rdesc[185] = HID_MAIN_ITEM_RELATIVE;35 }36 }37 38 return rdesc;39}40 41static 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 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);48 49 if ((quirks & QUIRK_TOUCHPAD_ON_OFF_REPORT) &&50 (usage->hid & HID_USAGE_PAGE) == 0x00880000) {51 if (usage->hid == 0x00880078) {52 /* Touchpad on, userspace expects F22 for this */53 hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_F22);54 return 1;55 }56 if (usage->hid == 0x00880079) {57 /* Touchpad off, userspace expects F23 for this */58 hid_map_usage_clear(hi, usage, bit, max, EV_KEY, KEY_F23);59 return 1;60 }61 return -1;62 }63 64 return 0;65}66 67static 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 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)73 return 0;74 75 input = field->hidinput->input;76 77 /*78 * The ITE8595 always reports 0 as value for the rfkill button. Luckily79 * it is the only button in its report, and it sends a report on80 * release only, so receiving a report means the button was pressed.81 */82 if (usage->hid == HID_GD_RFKILL_BTN) {83 input_event(input, EV_KEY, KEY_RFKILL, 1);84 input_sync(input);85 input_event(input, EV_KEY, KEY_RFKILL, 0);86 input_sync(input);87 return 1;88 }89 90 return 0;91}92 93static int ite_probe(struct hid_device *hdev, const struct hid_device_id *id)94{95 int ret;96 97 hid_set_drvdata(hdev, (void *)id->driver_data);98 99 ret = hid_open_report(hdev);100 if (ret)101 return ret;102 103 return hid_hw_start(hdev, HID_CONNECT_DEFAULT);104}105 106static 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};131MODULE_DEVICE_TABLE(hid, ite_devices);132 133static 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};141module_hid_driver(ite_driver);142 143MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");144MODULE_DESCRIPTION("HID driver for some ITE \"special\" devices");145MODULE_LICENSE("GPL");146