Commit f5cd71cf authored by Philippe Valembois's avatar Philippe Valembois Committed by Benjamin Tissoires
Browse files

HID: evision: Add preliminary support for EVision keyboards 



For now only supports one model and only filters out bogus reports sent
when the keyboard has been configured through hidraw.
Without this, as events are not released, soft repeat floods userspace
with unknown key events.

Signed-off-by: default avatarPhilippe Valembois <lephilousophe@gmail.com>
Link: https://lore.kernel.org/r/20230125211511.12266-1-lephilousophe@gmail.com


Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
parent 7287904c

drivers/hid/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -329,6 +329,13 @@ config HID_ELO 
	Support for the ELO USB 4000/4500 touchscreens. Note that this is for

	different devices than those handled by CONFIG_TOUCHSCREEN_USB_ELO.



config HID_EVISION

	tristate "EVision Keyboards Support"

	depends on HID

	help

	Support for some EVision keyboards. Note that this is needed only when

	applying customization using userspace programs.



config HID_EZKEY

	tristate "Ezkey BTC 8193 keyboard"

	default !EXPERT

drivers/hid/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ obj-$(CONFIG_HID_EMS_FF) += hid-emsff.o 
obj-$(CONFIG_HID_ELAN)		+= hid-elan.o

obj-$(CONFIG_HID_ELECOM)	+= hid-elecom.o

obj-$(CONFIG_HID_ELO)		+= hid-elo.o

obj-$(CONFIG_HID_EVISION)	+= hid-evision.o

obj-$(CONFIG_HID_EZKEY)		+= hid-ezkey.o

obj-$(CONFIG_HID_FT260)		+= hid-ft260.o

obj-$(CONFIG_HID_GEMBIRD)	+= hid-gembird.o

drivers/hid/hid-evision.c

0 → 100644
+53 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-or-later

/*

 *  HID driver for EVision devices

 *  For now, only ignore bogus consumer reports

 *  sent after the keyboard has been configured

 *

 *  Copyright (c) 2022 Philippe Valembois

 */



#include <linux/device.h>

#include <linux/input.h>

#include <linux/hid.h>

#include <linux/module.h>



#include "hid-ids.h"



static int evision_input_mapping(struct hid_device *hdev, struct hid_input *hi,

		struct hid_field *field, struct hid_usage *usage,

		unsigned long **bit, int *max)

{

	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)

		return 0;



	/* Ignore key down event */

	if ((usage->hid & HID_USAGE) >> 8 == 0x05)

		return -1;

	/* Ignore key up event */

	if ((usage->hid & HID_USAGE) >> 8 == 0x06)

		return -1;



	switch (usage->hid & HID_USAGE) {

	/* Ignore configuration saved event */

	case 0x0401: return -1;

	/* Ignore reset event */

	case 0x0402: return -1;

	}

	return 0;

}



static const struct hid_device_id evision_devices[] = {

	{ HID_USB_DEVICE(USB_VENDOR_ID_EVISION, USB_DEVICE_ID_EVISION_ICL01) },

	{ }

};

MODULE_DEVICE_TABLE(hid, evision_devices);



static struct hid_driver evision_driver = {

	.name = "evision",

	.id_table = evision_devices,

	.input_mapping = evision_input_mapping,

};

module_hid_driver(evision_driver);



MODULE_LICENSE("GPL");

drivers/hid/hid-ids.h

+3 −0
Original line number Diff line number Diff line
@@ -445,6 +445,9 @@ 
#define USB_VENDOR_ID_EMS		0x2006

#define USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II 0x0118



#define USB_VENDOR_ID_EVISION           0x320f

#define USB_DEVICE_ID_EVISION_ICL01     0x5041



#define USB_VENDOR_ID_FLATFROG		0x25b5

#define USB_DEVICE_ID_MULTITOUCH_3200	0x0002