whiterose

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hid-maltron.c (8313B)


      1 // SPDX-License-Identifier: GPL-2.0
      2 /*
      3  * HID driver for Maltron L90
      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) 2008 Jiri Slaby
      9  * Copyright (c) 2012 David Dillow <dave@thedillows.org>
     10  * Copyright (c) 2006-2013 Jiri Kosina
     11  * Copyright (c) 2013 Colin Leitner <colin.leitner@gmail.com>
     12  * Copyright (c) 2014-2016 Frank Praznik <frank.praznik@gmail.com>
     13  * Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
     14  * Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com>
     15  * Copyright (c) 2018 William Whistler <wtbw@wtbw.co.uk>
     16  */
     17 
     18 #include <linux/device.h>
     19 #include <linux/hid.h>
     20 #include <linux/module.h>
     21 
     22 #include "hid-ids.h"
     23 
     24 /* The original buggy USB descriptor */
     25 static u8 maltron_rdesc_o[] = {
     26 	0x05, 0x01,        /* Usage Page (Generic Desktop Ctrls) */
     27 	0x09, 0x80,        /* Usage (Sys Control)                */
     28 	0xA1, 0x01,        /* Collection (Application)           */
     29 	0x85, 0x02,        /*   Report ID (2)                    */
     30 	0x75, 0x01,        /*   Report Size (1)                  */
     31 	0x95, 0x01,        /*   Report Count (1)                 */
     32 	0x15, 0x00,        /*   Logical Minimum (0)              */
     33 	0x25, 0x01,        /*   Logical Maximum (1)              */
     34 	0x09, 0x82,        /*   Usage (Sys Sleep)                */
     35 	0x81, 0x06,        /*   Input (Data,Var,Rel)             */
     36 	0x09, 0x82,        /*   Usage (Sys Sleep)                */
     37 	0x81, 0x06,        /*   Input (Data,Var,Rel)             */
     38 	0x09, 0x83,        /*   Usage (Sys Wake Up)              */
     39 	0x81, 0x06,        /*   Input (Data,Var,Rel)             */
     40 	0x75, 0x05,        /*   Report Size (5)                  */
     41 	0x81, 0x01,        /*   Input (Const,Array,Abs)          */
     42 	0xC0,              /* End Collection                     */
     43 	0x05, 0x0C,        /* Usage Page (Consumer)              */
     44 	0x09, 0x01,        /* Usage (Consumer Control)           */
     45 	0xA1, 0x01,        /* Collection (Application)           */
     46 	0x85, 0x03,        /*   Report ID (3)                    */
     47 	0x95, 0x01,        /*   Report Count (1)                 */
     48 	0x75, 0x10,        /*   Report Size (16)                 */
     49 	0x19, 0x00,        /*   Usage Minimum (Unassigned)       */
     50 	0x2A, 0xFF, 0x7F,  /*   Usage Maximum (0x7FFF)           */
     51 	0x81, 0x00,        /*   Input (Data,Array,Abs)           */
     52 	0xC0,              /* End Collection                     */
     53 	0x06, 0x7F, 0xFF,  /* Usage Page (Vendor Defined 0xFF7F) */
     54 	0x09, 0x01,        /* Usage (0x01)                       */
     55 	0xA1, 0x01,        /* Collection (Application)           */
     56 	0x85, 0x04,        /*   Report ID (4)                    */
     57 	0x95, 0x01,        /*   Report Count (1)                 */
     58 	0x75, 0x10,        /*   Report Size (16)                 */
     59 	0x19, 0x00,        /*   Usage Minimum (0x00)             */
     60 	0x2A, 0xFF, 0x7F,  /*   Usage Maximum (0x7FFF)           */
     61 	0x81, 0x00,        /*   Input (Data,Array,Abs)           */
     62 	0x75, 0x02,        /*   Report Size (2)                  */
     63 	0x25, 0x02,        /*   Logical Maximum (2)              */
     64 	0x09, 0x90,        /*   Usage (0x90)                     */
     65 	0xB1, 0x02,        /*   Feature (Data,Var,Abs)           */
     66 	0x75, 0x06,        /*   Report Size (6)                  */
     67 	0xB1, 0x01,        /*   Feature (Const,Array,Abs)        */
     68 	0x75, 0x01,        /*   Report Size (1)                  */
     69 	0x25, 0x01,        /*   Logical Maximum (1)              */
     70 	0x05, 0x08,        /*   Usage Page (LEDs)                */
     71 	0x09, 0x2A,        /*   Usage (On-Line)                  */
     72 	0x91, 0x02,        /*   Output (Data,Var,Abs)            */
     73 	0x09, 0x4B,        /*   Usage (Generic Indicator)        */
     74 	0x91, 0x02,        /*   Output (Data,Var,Abs)            */
     75 	0x75, 0x06,        /*   Report Size (6)                  */
     76 	0x95, 0x01,        /*   Report Count (1)                 */
     77 	0x91, 0x01,        /*   Output (Const,Array,Abs)         */
     78 	0xC0               /* End Collection                     */
     79 };
     80 
     81 /* The patched descriptor, allowing media key events to be accepted as valid */
     82 static u8 maltron_rdesc[] = {
     83 	0x05, 0x01,        /* Usage Page (Generic Desktop Ctrls) */
     84 	0x09, 0x80,        /* Usage (Sys Control)                */
     85 	0xA1, 0x01,        /* Collection (Application)           */
     86 	0x85, 0x02,        /*   Report ID (2)                    */
     87 	0x75, 0x01,        /*   Report Size (1)                  */
     88 	0x95, 0x01,        /*   Report Count (1)                 */
     89 	0x15, 0x00,        /*   Logical Minimum (0)              */
     90 	0x25, 0x01,        /*   Logical Maximum (1)              */
     91 	0x09, 0x82,        /*   Usage (Sys Sleep)                */
     92 	0x81, 0x06,        /*   Input (Data,Var,Rel)             */
     93 	0x09, 0x82,        /*   Usage (Sys Sleep)                */
     94 	0x81, 0x06,        /*   Input (Data,Var,Rel)             */
     95 	0x09, 0x83,        /*   Usage (Sys Wake Up)              */
     96 	0x81, 0x06,        /*   Input (Data,Var,Rel)             */
     97 	0x75, 0x05,        /*   Report Size (5)                  */
     98 	0x81, 0x01,        /*   Input (Const,Array,Abs)          */
     99 	0xC0,              /* End Collection                     */
    100 	0x05, 0x0C,        /* Usage Page (Consumer)              */
    101 	0x09, 0x01,        /* Usage (Consumer Control)           */
    102 	0xA1, 0x01,        /* Collection (Application)           */
    103 	0x85, 0x03,        /*   Report ID (3)                    */
    104 	0x15, 0x00,        /*   Logical Minimum (0)              - changed */
    105 	0x26, 0xFF, 0x7F,  /*   Logical Maximum (32767)          - changed */
    106 	0x95, 0x01,        /*   Report Count (1)                 */
    107 	0x75, 0x10,        /*   Report Size (16)                 */
    108 	0x19, 0x00,        /*   Usage Minimum (Unassigned)       */
    109 	0x2A, 0xFF, 0x7F,  /*   Usage Maximum (0x7FFF)           */
    110 	0x81, 0x00,        /*   Input (Data,Array,Abs)           */
    111 	0xC0,              /* End Collection                     */
    112 	0x06, 0x7F, 0xFF,  /* Usage Page (Vendor Defined 0xFF7F) */
    113 	0x09, 0x01,        /* Usage (0x01)                       */
    114 	0xA1, 0x01,        /* Collection (Application)           */
    115 	0x85, 0x04,        /*   Report ID (4)                    */
    116 	0x95, 0x01,        /*   Report Count (1)                 */
    117 	0x75, 0x10,        /*   Report Size (16)                 */
    118 	0x19, 0x00,        /*   Usage Minimum (0x00)             */
    119 	0x2A, 0xFF, 0x7F,  /*   Usage Maximum (0x7FFF)           */
    120 	0x81, 0x00,        /*   Input (Data,Array,Abs)           */
    121 	0x75, 0x02,        /*   Report Size (2)                  */
    122 	0x25, 0x02,        /*   Logical Maximum (2)              */
    123 	0x09, 0x90,        /*   Usage (0x90)                     */
    124 	0xB1, 0x02,        /*   Feature (Data,Var,Abs)           */
    125 	0x75, 0x06,        /*   Report Size (6)                  */
    126 	0xB1, 0x01,        /*   Feature (Const,Array,Abs)        */
    127 	0x75, 0x01,        /*   Report Size (1)                  */
    128 	0x25, 0x01,        /*   Logical Maximum (1)              */
    129 	0x05, 0x08,        /*   Usage Page (LEDs)                */
    130 	0x09, 0x2A,        /*   Usage (On-Line)                  */
    131 	0x91, 0x02,        /*   Output (Data,Var,Abs)            */
    132 	0x09, 0x4B,        /*   Usage (Generic Indicator)        */
    133 	0x91, 0x02,        /*   Output (Data,Var,Abs)            */
    134 	0x75, 0x06,        /*   Report Size (6)                  */
    135 	0x95, 0x01,        /*   Report Count (1)                 */
    136 	0x91, 0x01,        /*   Output (Const,Array,Abs)         */
    137 	0xC0               /* End Collection                     */
    138 };
    139 
    140 static __u8 *maltron_report_fixup(struct hid_device *hdev, __u8 *rdesc,
    141 				  unsigned int *rsize)
    142 {
    143 	if (*rsize == sizeof(maltron_rdesc_o) &&
    144 	    !memcmp(maltron_rdesc_o, rdesc, sizeof(maltron_rdesc_o))) {
    145 		hid_info(hdev, "Replacing Maltron L90 keyboard report descriptor\n");
    146 		*rsize = sizeof(maltron_rdesc);
    147 		return maltron_rdesc;
    148 	}
    149 	return rdesc;
    150 }
    151 
    152 static const struct hid_device_id maltron_devices[] = {
    153 	{ HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_MALTRON_KB)},
    154 	{ }
    155 };
    156 MODULE_DEVICE_TABLE(hid, maltron_devices);
    157 
    158 static struct hid_driver maltron_driver = {
    159 	.name = "maltron",
    160 	.id_table = maltron_devices,
    161 	.report_fixup = maltron_report_fixup
    162 };
    163 module_hid_driver(maltron_driver);
    164 
    165 MODULE_LICENSE("GPL");