1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * HID driver for some chicony "special" devices 4 * 5 * Copyright (c) 1999 Andreas Gal 6 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> 7 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc 8 * Copyright (c) 2006-2007 Jiri Kosina 9 * Copyright (c) 2007 Paul Walmsley 10 * Copyright (c) 2008 Jiri Slaby 11 */ 12 13 /* 14 */ 15 16 #include <linux/device.h> 17 #include <linux/input.h> 18 #include <linux/hid.h> 19 #include <linux/module.h> 20 #include <linux/usb.h> 21 22 #include "hid-ids.h" 23 24 #define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \ 25 EV_KEY, (c)) 26 static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi, 27 struct hid_field *field, struct hid_usage *usage, 28 unsigned long **bit, int *max) 29 { 30 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR) 31 return 0; 32 33 set_bit(EV_REP, hi->input->evbit); 34 switch (usage->hid & HID_USAGE) { 35 case 0xff01: ch_map_key_clear(BTN_1); break; 36 case 0xff02: ch_map_key_clear(BTN_2); break; 37 case 0xff03: ch_map_key_clear(BTN_3); break; 38 case 0xff04: ch_map_key_clear(BTN_4); break; 39 case 0xff05: ch_map_key_clear(BTN_5); break; 40 case 0xff06: ch_map_key_clear(BTN_6); break; 41 case 0xff07: ch_map_key_clear(BTN_7); break; 42 case 0xff08: ch_map_key_clear(BTN_8); break; 43 case 0xff09: ch_map_key_clear(BTN_9); break; 44 case 0xff0a: ch_map_key_clear(BTN_A); break; 45 case 0xff0b: ch_map_key_clear(BTN_B); break; 46 case 0x00f1: ch_map_key_clear(KEY_WLAN); break; 47 case 0x00f2: ch_map_key_clear(KEY_BRIGHTNESSDOWN); break; 48 case 0x00f3: ch_map_key_clear(KEY_BRIGHTNESSUP); break; 49 case 0x00f4: ch_map_key_clear(KEY_DISPLAY_OFF); break; 50 case 0x00f7: ch_map_key_clear(KEY_CAMERA); break; 51 case 0x00f8: ch_map_key_clear(KEY_PROG1); break; 52 default: 53 return 0; 54 } 55 return 1; 56 } 57 58 static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc, 59 unsigned int *rsize) 60 { 61 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 62 63 if (intf->cur_altsetting->desc.bInterfaceNumber == 1) { 64 /* Change usage maximum and logical maximum from 0x7fff to 65 * 0x2fff, so they don't exceed HID_MAX_USAGES */ 66 switch (hdev->product) { 67 case USB_DEVICE_ID_CHICONY_ACER_SWITCH12: 68 if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f 69 && rdesc[69] == 0xff && rdesc[70] == 0x7f) { 70 hid_info(hdev, "Fixing up report descriptor\n"); 71 rdesc[65] = rdesc[70] = 0x2f; 72 } 73 break; 74 } 75 76 } 77 return rdesc; 78 } 79 80 81 static const struct hid_device_id ch_devices[] = { 82 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) }, 83 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) }, 84 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) }, 85 { } 86 }; 87 MODULE_DEVICE_TABLE(hid, ch_devices); 88 89 static struct hid_driver ch_driver = { 90 .name = "chicony", 91 .id_table = ch_devices, 92 .report_fixup = ch_switch12_report_fixup, 93 .input_mapping = ch_input_mapping, 94 }; 95 module_hid_driver(ch_driver); 96 97 MODULE_LICENSE("GPL"); 98