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af8cd70a99
The USB report descriptor sent by the Maltron L90 keyboard is invalid, causing the media key reports not to be accepted. This patch adds a driver which uses a report fixup to replace the descriptor. Signed-off-by: William Whistler <wtbw@wtbw.co.uk> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
165 lines
8.1 KiB
C
165 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* HID driver for Maltron L90
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*
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* Copyright (c) 1999 Andreas Gal
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* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
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* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
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* Copyright (c) 2008 Jiri Slaby
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* Copyright (c) 2012 David Dillow <dave@thedillows.org>
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* Copyright (c) 2006-2013 Jiri Kosina
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* Copyright (c) 2013 Colin Leitner <colin.leitner@gmail.com>
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* Copyright (c) 2014-2016 Frank Praznik <frank.praznik@gmail.com>
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* Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
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* Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com>
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* Copyright (c) 2018 William Whistler <wtbw@wtbw.co.uk>
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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/* The original buggy USB descriptor */
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static u8 maltron_rdesc_o[] = {
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0x05, 0x01, /* Usage Page (Generic Desktop Ctrls) */
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0x09, 0x80, /* Usage (Sys Control) */
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0xA1, 0x01, /* Collection (Application) */
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0x85, 0x02, /* Report ID (2) */
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0x75, 0x01, /* Report Size (1) */
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0x95, 0x01, /* Report Count (1) */
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0x15, 0x00, /* Logical Minimum (0) */
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0x25, 0x01, /* Logical Maximum (1) */
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0x09, 0x82, /* Usage (Sys Sleep) */
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0x81, 0x06, /* Input (Data,Var,Rel) */
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0x09, 0x82, /* Usage (Sys Sleep) */
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0x81, 0x06, /* Input (Data,Var,Rel) */
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0x09, 0x83, /* Usage (Sys Wake Up) */
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0x81, 0x06, /* Input (Data,Var,Rel) */
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0x75, 0x05, /* Report Size (5) */
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0x81, 0x01, /* Input (Const,Array,Abs) */
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0xC0, /* End Collection */
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0x05, 0x0C, /* Usage Page (Consumer) */
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0x09, 0x01, /* Usage (Consumer Control) */
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0xA1, 0x01, /* Collection (Application) */
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0x85, 0x03, /* Report ID (3) */
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0x95, 0x01, /* Report Count (1) */
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0x75, 0x10, /* Report Size (16) */
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0x19, 0x00, /* Usage Minimum (Unassigned) */
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0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */
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0x81, 0x00, /* Input (Data,Array,Abs) */
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0xC0, /* End Collection */
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0x06, 0x7F, 0xFF, /* Usage Page (Vendor Defined 0xFF7F) */
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0x09, 0x01, /* Usage (0x01) */
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0xA1, 0x01, /* Collection (Application) */
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0x85, 0x04, /* Report ID (4) */
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0x95, 0x01, /* Report Count (1) */
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0x75, 0x10, /* Report Size (16) */
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0x19, 0x00, /* Usage Minimum (0x00) */
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0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */
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0x81, 0x00, /* Input (Data,Array,Abs) */
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0x75, 0x02, /* Report Size (2) */
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0x25, 0x02, /* Logical Maximum (2) */
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0x09, 0x90, /* Usage (0x90) */
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0xB1, 0x02, /* Feature (Data,Var,Abs) */
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0x75, 0x06, /* Report Size (6) */
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0xB1, 0x01, /* Feature (Const,Array,Abs) */
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0x75, 0x01, /* Report Size (1) */
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0x25, 0x01, /* Logical Maximum (1) */
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0x05, 0x08, /* Usage Page (LEDs) */
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0x09, 0x2A, /* Usage (On-Line) */
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0x91, 0x02, /* Output (Data,Var,Abs) */
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0x09, 0x4B, /* Usage (Generic Indicator) */
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0x91, 0x02, /* Output (Data,Var,Abs) */
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0x75, 0x06, /* Report Size (6) */
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0x95, 0x01, /* Report Count (1) */
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0x91, 0x01, /* Output (Const,Array,Abs) */
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0xC0 /* End Collection */
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};
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/* The patched descriptor, allowing media key events to be accepted as valid */
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static u8 maltron_rdesc[] = {
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0x05, 0x01, /* Usage Page (Generic Desktop Ctrls) */
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0x09, 0x80, /* Usage (Sys Control) */
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0xA1, 0x01, /* Collection (Application) */
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0x85, 0x02, /* Report ID (2) */
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0x75, 0x01, /* Report Size (1) */
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0x95, 0x01, /* Report Count (1) */
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0x15, 0x00, /* Logical Minimum (0) */
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0x25, 0x01, /* Logical Maximum (1) */
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0x09, 0x82, /* Usage (Sys Sleep) */
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0x81, 0x06, /* Input (Data,Var,Rel) */
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0x09, 0x82, /* Usage (Sys Sleep) */
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0x81, 0x06, /* Input (Data,Var,Rel) */
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0x09, 0x83, /* Usage (Sys Wake Up) */
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0x81, 0x06, /* Input (Data,Var,Rel) */
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0x75, 0x05, /* Report Size (5) */
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0x81, 0x01, /* Input (Const,Array,Abs) */
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0xC0, /* End Collection */
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0x05, 0x0C, /* Usage Page (Consumer) */
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0x09, 0x01, /* Usage (Consumer Control) */
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0xA1, 0x01, /* Collection (Application) */
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0x85, 0x03, /* Report ID (3) */
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0x15, 0x00, /* Logical Minimum (0) - changed */
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0x26, 0xFF, 0x7F, /* Logical Maximum (32767) - changed */
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0x95, 0x01, /* Report Count (1) */
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0x75, 0x10, /* Report Size (16) */
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0x19, 0x00, /* Usage Minimum (Unassigned) */
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0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */
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0x81, 0x00, /* Input (Data,Array,Abs) */
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0xC0, /* End Collection */
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0x06, 0x7F, 0xFF, /* Usage Page (Vendor Defined 0xFF7F) */
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0x09, 0x01, /* Usage (0x01) */
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0xA1, 0x01, /* Collection (Application) */
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0x85, 0x04, /* Report ID (4) */
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0x95, 0x01, /* Report Count (1) */
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0x75, 0x10, /* Report Size (16) */
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0x19, 0x00, /* Usage Minimum (0x00) */
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0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */
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0x81, 0x00, /* Input (Data,Array,Abs) */
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0x75, 0x02, /* Report Size (2) */
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0x25, 0x02, /* Logical Maximum (2) */
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0x09, 0x90, /* Usage (0x90) */
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0xB1, 0x02, /* Feature (Data,Var,Abs) */
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0x75, 0x06, /* Report Size (6) */
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0xB1, 0x01, /* Feature (Const,Array,Abs) */
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0x75, 0x01, /* Report Size (1) */
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0x25, 0x01, /* Logical Maximum (1) */
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0x05, 0x08, /* Usage Page (LEDs) */
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0x09, 0x2A, /* Usage (On-Line) */
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0x91, 0x02, /* Output (Data,Var,Abs) */
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0x09, 0x4B, /* Usage (Generic Indicator) */
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0x91, 0x02, /* Output (Data,Var,Abs) */
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0x75, 0x06, /* Report Size (6) */
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0x95, 0x01, /* Report Count (1) */
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0x91, 0x01, /* Output (Const,Array,Abs) */
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0xC0 /* End Collection */
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};
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static __u8 *maltron_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int *rsize)
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{
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if (*rsize == sizeof(maltron_rdesc_o) &&
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!memcmp(maltron_rdesc_o, rdesc, sizeof(maltron_rdesc_o))) {
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hid_info(hdev, "Replacing Maltron L90 keyboard report descriptor\n");
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*rsize = sizeof(maltron_rdesc);
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return maltron_rdesc;
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}
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return rdesc;
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}
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static const struct hid_device_id maltron_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_MALTRON_KB)},
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{ }
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};
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MODULE_DEVICE_TABLE(hid, maltron_devices);
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static struct hid_driver maltron_driver = {
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.name = "maltron",
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.id_table = maltron_devices,
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.report_fixup = maltron_report_fixup
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};
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module_hid_driver(maltron_driver);
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MODULE_LICENSE("GPL");
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