| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * HID driver for Maltron L90 |
| * |
| * Copyright (c) 1999 Andreas Gal |
| * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> |
| * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc |
| * Copyright (c) 2008 Jiri Slaby |
| * Copyright (c) 2012 David Dillow <dave@thedillows.org> |
| * Copyright (c) 2006-2013 Jiri Kosina |
| * Copyright (c) 2013 Colin Leitner <colin.leitner@gmail.com> |
| * Copyright (c) 2014-2016 Frank Praznik <frank.praznik@gmail.com> |
| * Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com> |
| * Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com> |
| * Copyright (c) 2018 William Whistler <wtbw@wtbw.co.uk> |
| */ |
| |
| #include <linux/device.h> |
| #include <linux/hid.h> |
| #include <linux/module.h> |
| |
| #include "hid-ids.h" |
| |
| /* The original buggy USB descriptor */ |
| static u8 maltron_rdesc_o[] = { |
| 0x05, 0x01, /* Usage Page (Generic Desktop Ctrls) */ |
| 0x09, 0x80, /* Usage (Sys Control) */ |
| 0xA1, 0x01, /* Collection (Application) */ |
| 0x85, 0x02, /* Report ID (2) */ |
| 0x75, 0x01, /* Report Size (1) */ |
| 0x95, 0x01, /* Report Count (1) */ |
| 0x15, 0x00, /* Logical Minimum (0) */ |
| 0x25, 0x01, /* Logical Maximum (1) */ |
| 0x09, 0x82, /* Usage (Sys Sleep) */ |
| 0x81, 0x06, /* Input (Data,Var,Rel) */ |
| 0x09, 0x82, /* Usage (Sys Sleep) */ |
| 0x81, 0x06, /* Input (Data,Var,Rel) */ |
| 0x09, 0x83, /* Usage (Sys Wake Up) */ |
| 0x81, 0x06, /* Input (Data,Var,Rel) */ |
| 0x75, 0x05, /* Report Size (5) */ |
| 0x81, 0x01, /* Input (Const,Array,Abs) */ |
| 0xC0, /* End Collection */ |
| 0x05, 0x0C, /* Usage Page (Consumer) */ |
| 0x09, 0x01, /* Usage (Consumer Control) */ |
| 0xA1, 0x01, /* Collection (Application) */ |
| 0x85, 0x03, /* Report ID (3) */ |
| 0x95, 0x01, /* Report Count (1) */ |
| 0x75, 0x10, /* Report Size (16) */ |
| 0x19, 0x00, /* Usage Minimum (Unassigned) */ |
| 0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */ |
| 0x81, 0x00, /* Input (Data,Array,Abs) */ |
| 0xC0, /* End Collection */ |
| 0x06, 0x7F, 0xFF, /* Usage Page (Vendor Defined 0xFF7F) */ |
| 0x09, 0x01, /* Usage (0x01) */ |
| 0xA1, 0x01, /* Collection (Application) */ |
| 0x85, 0x04, /* Report ID (4) */ |
| 0x95, 0x01, /* Report Count (1) */ |
| 0x75, 0x10, /* Report Size (16) */ |
| 0x19, 0x00, /* Usage Minimum (0x00) */ |
| 0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */ |
| 0x81, 0x00, /* Input (Data,Array,Abs) */ |
| 0x75, 0x02, /* Report Size (2) */ |
| 0x25, 0x02, /* Logical Maximum (2) */ |
| 0x09, 0x90, /* Usage (0x90) */ |
| 0xB1, 0x02, /* Feature (Data,Var,Abs) */ |
| 0x75, 0x06, /* Report Size (6) */ |
| 0xB1, 0x01, /* Feature (Const,Array,Abs) */ |
| 0x75, 0x01, /* Report Size (1) */ |
| 0x25, 0x01, /* Logical Maximum (1) */ |
| 0x05, 0x08, /* Usage Page (LEDs) */ |
| 0x09, 0x2A, /* Usage (On-Line) */ |
| 0x91, 0x02, /* Output (Data,Var,Abs) */ |
| 0x09, 0x4B, /* Usage (Generic Indicator) */ |
| 0x91, 0x02, /* Output (Data,Var,Abs) */ |
| 0x75, 0x06, /* Report Size (6) */ |
| 0x95, 0x01, /* Report Count (1) */ |
| 0x91, 0x01, /* Output (Const,Array,Abs) */ |
| 0xC0 /* End Collection */ |
| }; |
| |
| /* The patched descriptor, allowing media key events to be accepted as valid */ |
| static u8 maltron_rdesc[] = { |
| 0x05, 0x01, /* Usage Page (Generic Desktop Ctrls) */ |
| 0x09, 0x80, /* Usage (Sys Control) */ |
| 0xA1, 0x01, /* Collection (Application) */ |
| 0x85, 0x02, /* Report ID (2) */ |
| 0x75, 0x01, /* Report Size (1) */ |
| 0x95, 0x01, /* Report Count (1) */ |
| 0x15, 0x00, /* Logical Minimum (0) */ |
| 0x25, 0x01, /* Logical Maximum (1) */ |
| 0x09, 0x82, /* Usage (Sys Sleep) */ |
| 0x81, 0x06, /* Input (Data,Var,Rel) */ |
| 0x09, 0x82, /* Usage (Sys Sleep) */ |
| 0x81, 0x06, /* Input (Data,Var,Rel) */ |
| 0x09, 0x83, /* Usage (Sys Wake Up) */ |
| 0x81, 0x06, /* Input (Data,Var,Rel) */ |
| 0x75, 0x05, /* Report Size (5) */ |
| 0x81, 0x01, /* Input (Const,Array,Abs) */ |
| 0xC0, /* End Collection */ |
| 0x05, 0x0C, /* Usage Page (Consumer) */ |
| 0x09, 0x01, /* Usage (Consumer Control) */ |
| 0xA1, 0x01, /* Collection (Application) */ |
| 0x85, 0x03, /* Report ID (3) */ |
| 0x15, 0x00, /* Logical Minimum (0) - changed */ |
| 0x26, 0xFF, 0x7F, /* Logical Maximum (32767) - changed */ |
| 0x95, 0x01, /* Report Count (1) */ |
| 0x75, 0x10, /* Report Size (16) */ |
| 0x19, 0x00, /* Usage Minimum (Unassigned) */ |
| 0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */ |
| 0x81, 0x00, /* Input (Data,Array,Abs) */ |
| 0xC0, /* End Collection */ |
| 0x06, 0x7F, 0xFF, /* Usage Page (Vendor Defined 0xFF7F) */ |
| 0x09, 0x01, /* Usage (0x01) */ |
| 0xA1, 0x01, /* Collection (Application) */ |
| 0x85, 0x04, /* Report ID (4) */ |
| 0x95, 0x01, /* Report Count (1) */ |
| 0x75, 0x10, /* Report Size (16) */ |
| 0x19, 0x00, /* Usage Minimum (0x00) */ |
| 0x2A, 0xFF, 0x7F, /* Usage Maximum (0x7FFF) */ |
| 0x81, 0x00, /* Input (Data,Array,Abs) */ |
| 0x75, 0x02, /* Report Size (2) */ |
| 0x25, 0x02, /* Logical Maximum (2) */ |
| 0x09, 0x90, /* Usage (0x90) */ |
| 0xB1, 0x02, /* Feature (Data,Var,Abs) */ |
| 0x75, 0x06, /* Report Size (6) */ |
| 0xB1, 0x01, /* Feature (Const,Array,Abs) */ |
| 0x75, 0x01, /* Report Size (1) */ |
| 0x25, 0x01, /* Logical Maximum (1) */ |
| 0x05, 0x08, /* Usage Page (LEDs) */ |
| 0x09, 0x2A, /* Usage (On-Line) */ |
| 0x91, 0x02, /* Output (Data,Var,Abs) */ |
| 0x09, 0x4B, /* Usage (Generic Indicator) */ |
| 0x91, 0x02, /* Output (Data,Var,Abs) */ |
| 0x75, 0x06, /* Report Size (6) */ |
| 0x95, 0x01, /* Report Count (1) */ |
| 0x91, 0x01, /* Output (Const,Array,Abs) */ |
| 0xC0 /* End Collection */ |
| }; |
| |
| static __u8 *maltron_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
| unsigned int *rsize) |
| { |
| if (*rsize == sizeof(maltron_rdesc_o) && |
| !memcmp(maltron_rdesc_o, rdesc, sizeof(maltron_rdesc_o))) { |
| hid_info(hdev, "Replacing Maltron L90 keyboard report descriptor\n"); |
| *rsize = sizeof(maltron_rdesc); |
| return maltron_rdesc; |
| } |
| return rdesc; |
| } |
| |
| static const struct hid_device_id maltron_devices[] = { |
| { HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_MALTRON_KB)}, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(hid, maltron_devices); |
| |
| static struct hid_driver maltron_driver = { |
| .name = "maltron", |
| .id_table = maltron_devices, |
| .report_fixup = maltron_report_fixup |
| }; |
| module_hid_driver(maltron_driver); |
| |
| MODULE_DESCRIPTION("HID driver for Maltron L90"); |
| MODULE_LICENSE("GPL"); |
