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 static __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 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; 30 } 31 } 32 33 return rdesc; 34 } 35 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, 39 int *max) 40 { 41 42 unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); 43 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); 49 return 1; 50 } 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); 54 return 1; 55 } 56 return -1; 57 } 58 59 return 0; 60 } 61 62 static int ite_event(struct hid_device *hdev, struct hid_field *field, 63 struct hid_usage *usage, __s32 value) 64 { 65 struct input_dev *input; 66 67 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput) 68 return 0; 69 70 input = field->hidinput->input; 71 72 /* 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. 76 */ 77 if (usage->hid == HID_GD_RFKILL_BTN) { 78 input_event(input, EV_KEY, KEY_RFKILL, 1); 79 input_sync(input); 80 input_event(input, EV_KEY, KEY_RFKILL, 0); 81 input_sync(input); 82 return 1; 83 } 84 85 return 0; 86 } 87 88 static int ite_probe(struct hid_device *hdev, const struct hid_device_id *id) 89 { 90 int ret; 91 92 hid_set_drvdata(hdev, (void *)id->driver_data); 93 94 ret = hid_open_report(hdev); 95 if (ret) 96 return ret; 97 98 return hid_hw_start(hdev, HID_CONNECT_DEFAULT); 99 } 100 101 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) }, 118 { } 119 }; 120 MODULE_DEVICE_TABLE(hid, ite_devices); 121 122 static struct hid_driver ite_driver = { 123 .name = "itetech", 124 .id_table = ite_devices, 125 .probe = ite_probe, 126 .report_fixup = ite_report_fixup, 127 .input_mapping = ite_input_mapping, 128 .event = ite_event, 129 }; 130 module_hid_driver(ite_driver); 131 132 MODULE_LICENSE("GPL"); 133