From: Harry Stern harry@harrystern.net
[ Upstream commit a109d5c45b3d6728b9430716b915afbe16eef27c ]
The Topre REALFORCE R2 firmware incorrectly reports that interface descriptor number 1, input report descriptor 2's events are array events rather than variable events. That particular report descriptor is used to report keypresses when there are more than 6 keys held at a time. This bug prevents events from this interface from being registered properly, so only 6 keypresses (from a different interface) can be registered at once, rather than full n-key rollover.
This commit fixes the bug by setting the correct value in a report_fixup function.
The original bug report can be found here: Link: https://gitlab.freedesktop.org/libinput/libinput/-/issues/804
Thanks to Benjamin Tissoires for diagnosing the issue with the report descriptor.
Signed-off-by: Harry Stern harry@harrystern.net Signed-off-by: Benjamin Tissoires benjamin.tissoires@redhat.com Link: https://lore.kernel.org/r/20220911003614.297613-1-harry@harrystern.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hid/Kconfig | 6 +++++ drivers/hid/Makefile | 1 + drivers/hid/hid-ids.h | 3 +++ drivers/hid/hid-topre.c | 49 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 59 insertions(+) create mode 100644 drivers/hid/hid-topre.c
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 5169a38ee47a..56315a0be78a 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -992,6 +992,12 @@ config HID_TOPSEED Say Y if you have a TopSeed Cyberlink or BTC Emprex or Conceptronic CLLRCMCE remote control.
+config HID_TOPRE + tristate "Topre REALFORCE keyboards" + depends on HID + help + Say Y for N-key rollover support on Topre REALFORCE R2 108 key keyboards. + config HID_THINGM tristate "ThingM blink(1) USB RGB LED" depends on HID diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile index 0c03308cfb08..bb618c74c442 100644 --- a/drivers/hid/Makefile +++ b/drivers/hid/Makefile @@ -110,6 +110,7 @@ obj-$(CONFIG_HID_GREENASIA) += hid-gaff.o obj-$(CONFIG_HID_THRUSTMASTER) += hid-tmff.o obj-$(CONFIG_HID_TIVO) += hid-tivo.o obj-$(CONFIG_HID_TOPSEED) += hid-topseed.o +obj-$(CONFIG_HID_TOPRE) += hid-topre.o obj-$(CONFIG_HID_TWINHAN) += hid-twinhan.o obj-$(CONFIG_HID_U2FZERO) += hid-u2fzero.o hid-uclogic-objs := hid-uclogic-core.o \ diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index c587a77d493c..fbceead99b3c 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -1156,6 +1156,9 @@ #define USB_DEVICE_ID_TIVO_SLIDE 0x1201 #define USB_DEVICE_ID_TIVO_SLIDE_PRO 0x1203
+#define USB_VENDOR_ID_TOPRE 0x0853 +#define USB_DEVICE_ID_TOPRE_REALFORCE_R2_108 0x0148 + #define USB_VENDOR_ID_TOPSEED 0x0766 #define USB_DEVICE_ID_TOPSEED_CYBERLINK 0x0204
diff --git a/drivers/hid/hid-topre.c b/drivers/hid/hid-topre.c new file mode 100644 index 000000000000..88a91cdad5f8 --- /dev/null +++ b/drivers/hid/hid-topre.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * HID driver for Topre REALFORCE Keyboards + * + * Copyright (c) 2022 Harry Stern harry@harrystern.net + * + * Based on the hid-macally driver + */ + +#include <linux/hid.h> +#include <linux/module.h> + +#include "hid-ids.h" + +MODULE_AUTHOR("Harry Stern harry@harrystern.net"); +MODULE_DESCRIPTION("REALFORCE R2 Keyboard driver"); +MODULE_LICENSE("GPL"); + +/* + * Fix the REALFORCE R2's non-boot interface's report descriptor to match the + * events it's actually sending. It claims to send array events but is instead + * sending variable events. + */ +static __u8 *topre_report_fixup(struct hid_device *hdev, __u8 *rdesc, + unsigned int *rsize) +{ + if (*rsize >= 119 && rdesc[69] == 0x29 && rdesc[70] == 0xe7 && + rdesc[71] == 0x81 && rdesc[72] == 0x00) { + hid_info(hdev, + "fixing up Topre REALFORCE keyboard report descriptor\n"); + rdesc[72] = 0x02; + } + return rdesc; +} + +static const struct hid_device_id topre_id_table[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_TOPRE, + USB_DEVICE_ID_TOPRE_REALFORCE_R2_108) }, + { } +}; +MODULE_DEVICE_TABLE(hid, topre_id_table); + +static struct hid_driver topre_driver = { + .name = "topre", + .id_table = topre_id_table, + .report_fixup = topre_report_fixup, +}; + +module_hid_driver(topre_driver);