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/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 41 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 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 67 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 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. 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 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 93 static 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 } 105 106 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 { } 125 }; 126 MODULE_DEVICE_TABLE(hid, ite_devices); 127 128 static struct hid_driver ite_driver = { 129 .name = "itetech", 130 .id_table = ite_devices, 131 .probe = ite_probe, 132 .report_fixup = ite_report_fixup, 133 .input_mapping = ite_input_mapping, 134 .event = ite_event, 135 }; 136 module_hid_driver(ite_driver); 137 138 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 139 MODULE_LICENSE("GPL"); 140