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

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  HID driver for some sunplus "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) 2008 Jiri Slaby
  10 */
  11
  12/*
  13 */
  14
  15#include <linux/device.h>
  16#include <linux/hid.h>
  17#include <linux/module.h>
  18
  19#include "hid-ids.h"
  20
  21static __u8 *sp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  22                unsigned int *rsize)
  23{
  24        if (*rsize >= 112 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
  25                        rdesc[106] == 0x03) {
  26                hid_info(hdev, "fixing up Sunplus Wireless Desktop report descriptor\n");
  27                rdesc[105] = rdesc[110] = 0x03;
  28                rdesc[106] = rdesc[111] = 0x21;
  29        }
  30        return rdesc;
  31}
  32
  33#define sp_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, max, \
  34                EV_KEY, (c))
  35static int sp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  36                struct hid_field *field, struct hid_usage *usage,
  37                unsigned long **bit, int *max)
  38{
  39        if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
  40                return 0;
  41
  42        switch (usage->hid & HID_USAGE) {
  43        case 0x2003: sp_map_key_clear(KEY_ZOOMIN);              break;
  44        case 0x2103: sp_map_key_clear(KEY_ZOOMOUT);     break;
  45        default:
  46                return 0;
  47        }
  48        return 1;
  49}
  50
  51static const struct hid_device_id sp_devices[] = {
  52        { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
  53        { }
  54};
  55MODULE_DEVICE_TABLE(hid, sp_devices);
  56
  57static struct hid_driver sp_driver = {
  58        .name = "sunplus",
  59        .id_table = sp_devices,
  60        .report_fixup = sp_report_fixup,
  61        .input_mapping = sp_input_mapping,
  62};
  63module_hid_driver(sp_driver);
  64
  65MODULE_LICENSE("GPL");
  66