Line data    Source code

       1             : // SPDX-License-Identifier: GPL-2.0-or-later
       2             : /*
       3             :  *  HID driver for some cherry "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             : /*
      22             :  * Cherry Cymotion keyboard have an invalid HID report descriptor,
      23             :  * that needs fixing before we can parse it.
      24             :  */
      25           0 : static __u8 *ch_report_fixup(struct hid_device *hdev, __u8 *rdesc,
      26             :                 unsigned int *rsize)
      27             : {
      28           0 :         if (*rsize >= 18 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
      29           0 :                 hid_info(hdev, "fixing up Cherry Cymotion report descriptor\n");
      30           0 :                 rdesc[11] = rdesc[16] = 0xff;
      31           0 :                 rdesc[12] = rdesc[17] = 0x03;
      32             :         }
      33           0 :         return rdesc;
      34             : }
      35             : 
      36             : #define ch_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, max, \
      37             :                                         EV_KEY, (c))
      38           0 : static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
      39             :                 struct hid_field *field, struct hid_usage *usage,
      40             :                 unsigned long **bit, int *max)
      41             : {
      42           0 :         if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
      43             :                 return 0;
      44             : 
      45           0 :         switch (usage->hid & HID_USAGE) {
      46           0 :         case 0x301: ch_map_key_clear(KEY_PROG1);        break;
      47           0 :         case 0x302: ch_map_key_clear(KEY_PROG2);        break;
      48           0 :         case 0x303: ch_map_key_clear(KEY_PROG3);        break;
      49             :         default:
      50             :                 return 0;
      51             :         }
      52             : 
      53             :         return 1;
      54             : }
      55             : 
      56             : static const struct hid_device_id ch_devices[] = {
      57             :         { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
      58             :         { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
      59             :         { }
      60             : };
      61             : MODULE_DEVICE_TABLE(hid, ch_devices);
      62             : 
      63             : static struct hid_driver ch_driver = {
      64             :         .name = "cherry",
      65             :         .id_table = ch_devices,
      66             :         .report_fixup = ch_report_fixup,
      67             :         .input_mapping = ch_input_mapping,
      68             : };
      69           1 : module_hid_driver(ch_driver);
      70             : 
      71             : MODULE_LICENSE("GPL");