root/drivers/hid/hid-sunplus.c

DEFINITIONS

1. sp_report_fixup
2. sp_input_mapping

   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 
  21 static __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))
  35 static 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 
  51 static const struct hid_device_id sp_devices[] = {
  52         { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
  53         { }
  54 };
  55 MODULE_DEVICE_TABLE(hid, sp_devices);
  56 
  57 static 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 };
  63 module_hid_driver(sp_driver);
  64 
  65 MODULE_LICENSE("GPL");