1 /* 2 * HID driver for some chicony "special" devices 3 * 4 * Copyright (c) 1999 Andreas Gal 5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> 6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc 7 * Copyright (c) 2006-2007 Jiri Kosina 8 * Copyright (c) 2007 Paul Walmsley 9 * Copyright (c) 2008 Jiri Slaby 10 */ 11 12 /* 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms of the GNU General Public License as published by the Free 15 * Software Foundation; either version 2 of the License, or (at your option) 16 * any later version. 17 */ 18 19 #include <linux/device.h> 20 #include <linux/input.h> 21 #include <linux/hid.h> 22 #include <linux/module.h> 23 #include <linux/usb.h> 24 25 #include "hid-ids.h" 26 27 #define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \ 28 EV_KEY, (c)) 29 static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi, 30 struct hid_field *field, struct hid_usage *usage, 31 unsigned long **bit, int *max) 32 { 33 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR) 34 return 0; 35 36 set_bit(EV_REP, hi->input->evbit); 37 switch (usage->hid & HID_USAGE) { 38 case 0xff01: ch_map_key_clear(BTN_1); break; 39 case 0xff02: ch_map_key_clear(BTN_2); break; 40 case 0xff03: ch_map_key_clear(BTN_3); break; 41 case 0xff04: ch_map_key_clear(BTN_4); break; 42 case 0xff05: ch_map_key_clear(BTN_5); break; 43 case 0xff06: ch_map_key_clear(BTN_6); break; 44 case 0xff07: ch_map_key_clear(BTN_7); break; 45 case 0xff08: ch_map_key_clear(BTN_8); break; 46 case 0xff09: ch_map_key_clear(BTN_9); break; 47 case 0xff0a: ch_map_key_clear(BTN_A); break; 48 case 0xff0b: ch_map_key_clear(BTN_B); break; 49 case 0x00f1: ch_map_key_clear(KEY_WLAN); break; 50 case 0x00f2: ch_map_key_clear(KEY_BRIGHTNESSDOWN); break; 51 case 0x00f3: ch_map_key_clear(KEY_BRIGHTNESSUP); break; 52 case 0x00f4: ch_map_key_clear(KEY_DISPLAY_OFF); break; 53 case 0x00f7: ch_map_key_clear(KEY_CAMERA); break; 54 case 0x00f8: ch_map_key_clear(KEY_PROG1); break; 55 default: 56 return 0; 57 } 58 return 1; 59 } 60 61 static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc, 62 unsigned int *rsize) 63 { 64 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 65 66 if (intf->cur_altsetting->desc.bInterfaceNumber == 1) { 67 /* Change usage maximum and logical maximum from 0x7fff to 68 * 0x2fff, so they don't exceed HID_MAX_USAGES */ 69 switch (hdev->product) { 70 case USB_DEVICE_ID_CHICONY_ACER_SWITCH12: 71 if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f 72 && rdesc[69] == 0xff && rdesc[70] == 0x7f) { 73 hid_info(hdev, "Fixing up report descriptor\n"); 74 rdesc[65] = rdesc[70] = 0x2f; 75 } 76 break; 77 } 78 79 } 80 return rdesc; 81 } 82 83 84 static const struct hid_device_id ch_devices[] = { 85 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) }, 86 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) }, 87 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) }, 88 { } 89 }; 90 MODULE_DEVICE_TABLE(hid, ch_devices); 91 92 static struct hid_driver ch_driver = { 93 .name = "chicony", 94 .id_table = ch_devices, 95 .report_fixup = ch_switch12_report_fixup, 96 .input_mapping = ch_input_mapping, 97 }; 98 module_hid_driver(ch_driver); 99 100 MODULE_LICENSE("GPL"); 101