Line data    Source code

       1             : // SPDX-License-Identifier: GPL-2.0-or-later
       2             : /*
       3             :  *  HID driver for some ezkey "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/input.h>
      17             : #include <linux/hid.h>
      18             : #include <linux/module.h>
      19             : 
      20             : #include "hid-ids.h"
      21             : 
      22             : #define ez_map_rel(c)   hid_map_usage(hi, usage, bit, max, EV_REL, (c))
      23             : #define ez_map_key(c)   hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
      24             : 
      25           0 : static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi,
      26             :                 struct hid_field *field, struct hid_usage *usage,
      27             :                 unsigned long **bit, int *max)
      28             : {
      29           0 :         if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
      30             :                 return 0;
      31             : 
      32           0 :         switch (usage->hid & HID_USAGE) {
      33           0 :         case 0x230: ez_map_key(BTN_MOUSE);      break;
      34           0 :         case 0x231: ez_map_rel(REL_WHEEL);      break;
      35             :         /*
      36             :          * this keyboard has a scrollwheel implemented in
      37             :          * totally broken way. We map this usage temporarily
      38             :          * to HWHEEL and handle it in the event quirk handler
      39             :          */
      40           0 :         case 0x232: ez_map_rel(REL_HWHEEL);     break;
      41             :         default:
      42             :                 return 0;
      43             :         }
      44             :         return 1;
      45             : }
      46             : 
      47           0 : static int ez_event(struct hid_device *hdev, struct hid_field *field,
      48             :                 struct hid_usage *usage, __s32 value)
      49             : {
      50           0 :         if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
      51           0 :                         !usage->type)
      52             :                 return 0;
      53             : 
      54             :         /* handle the temporary quirky mapping to HWHEEL */
      55           0 :         if (usage->type == EV_REL && usage->code == REL_HWHEEL) {
      56           0 :                 struct input_dev *input = field->hidinput->input;
      57           0 :                 input_event(input, usage->type, REL_WHEEL, -value);
      58           0 :                 return 1;
      59             :         }
      60             : 
      61             :         return 0;
      62             : }
      63             : 
      64             : static const struct hid_device_id ez_devices[] = {
      65             :         { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
      66             :         { }
      67             : };
      68             : MODULE_DEVICE_TABLE(hid, ez_devices);
      69             : 
      70             : static struct hid_driver ez_driver = {
      71             :         .name = "ezkey",
      72             :         .id_table = ez_devices,
      73             :         .input_mapping = ez_input_mapping,
      74             :         .event = ez_event,
      75             : };
      76           1 : module_hid_driver(ez_driver);
      77             : 
      78             : MODULE_LICENSE("GPL");