drivers/hid/hid-sunplus.c

   1 /*
   2  *  HID driver for some sunplus "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/hid.h>
  21 #include <linux/module.h>
  22
  23 #include "hid-ids.h"
  24
  25 static void sp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  26                 unsigned int rsize)
  27 {
  28         if (rsize >= 107 && rdesc[104] == 0x26 && rdesc[105] == 0x80 &&
  29                         rdesc[106] == 0x03) {
  30                 dev_info(&hdev->dev, "fixing up Sunplus Wireless Desktop "
  31                                 "report descriptor\n");
  32                 rdesc[105] = rdesc[110] = 0x03;
  33                 rdesc[106] = rdesc[111] = 0x21;
  34         }
  35 }
  36
  37 #define sp_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, max, \
  38                 EV_KEY, (c))
  39 static int sp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  40                 struct hid_field *field, struct hid_usage *usage,
  41                 unsigned long **bit, int *max)
  42 {
  43         if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
  44                 return 0;
  45
  46         switch (usage->hid & HID_USAGE) {
  47         case 0x2003: sp_map_key_clear(KEY_ZOOMIN);              break;
  48         case 0x2103: sp_map_key_clear(KEY_ZOOMOUT);     break;
  49         default:
  50                 return 0;
  51         }
  52         return 1;
  53 }
  54
  55 static const struct hid_device_id sp_devices[] = {
  56         { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
  57         { }
  58 };
  59 MODULE_DEVICE_TABLE(hid, sp_devices);
  60
  61 static struct hid_driver sp_driver = {
  62         .name = "sunplus",
  63         .id_table = sp_devices,
  64         .report_fixup = sp_report_fixup,
  65         .input_mapping = sp_input_mapping,
  66 };
  67
  68 static int sp_init(void)
  69 {
  70         return hid_register_driver(&sp_driver);
  71 }
  72
  73 static void sp_exit(void)
  74 {
  75         hid_unregister_driver(&sp_driver);
  76 }
  77
  78 module_init(sp_init);
  79 module_exit(sp_exit);
  80 MODULE_LICENSE("GPL");
  81
  82 HID_COMPAT_LOAD_DRIVER(sunplus);