LXR linux/drivers/hid/hid-chicony.c

   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))
  26static 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
  58static __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
  81static 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};
  87MODULE_DEVICE_TABLE(hid, ch_devices);
  88
  89static 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};
  95module_hid_driver(ch_driver);
  96
  97MODULE_LICENSE("GPL");
  98