1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * HID driver for EVision devices 4 * For now, only ignore bogus consumer reports 5 * sent after the keyboard has been configured 6 * 7 * Copyright (c) 2022 Philippe Valembois 8 */ 9 10 #include <linux/device.h> 11 #include <linux/input.h> 12 #include <linux/hid.h> 13 #include <linux/module.h> 14 15 #include "hid-ids.h" 16 17 static int evision_input_mapping(struct hid_device *hdev, struct hid_input *hi, 18 struct hid_field *field, struct hid_usage *usage, 19 unsigned long **bit, int *max) 20 { 21 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) 22 return 0; 23 24 /* Ignore key down event */ 25 if ((usage->hid & HID_USAGE) >> 8 == 0x05) 26 return -1; 27 /* Ignore key up event */ 28 if ((usage->hid & HID_USAGE) >> 8 == 0x06) 29 return -1; 30 31 switch (usage->hid & HID_USAGE) { 32 /* Ignore configuration saved event */ 33 case 0x0401: return -1; 34 /* Ignore reset event */ 35 case 0x0402: return -1; 36 } 37 return 0; 38 } 39 40 static const struct hid_device_id evision_devices[] = { 41 { HID_USB_DEVICE(USB_VENDOR_ID_EVISION, USB_DEVICE_ID_EVISION_ICL01) }, 42 { } 43 }; 44 MODULE_DEVICE_TABLE(hid, evision_devices); 45 46 static struct hid_driver evision_driver = { 47 .name = "evision", 48 .id_table = evision_devices, 49 .input_mapping = evision_input_mapping, 50 }; 51 module_hid_driver(evision_driver); 52 53 MODULE_LICENSE("GPL"); 54