diff options
Diffstat (limited to 'drivers/hid/hid-elo.c')
| -rw-r--r-- | drivers/hid/hid-elo.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/hid/hid-elo.c b/drivers/hid/hid-elo.c index 0cd4f7216239..cf17bdd14d9c 100644 --- a/drivers/hid/hid-elo.c +++ b/drivers/hid/hid-elo.c @@ -1,11 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * HID driver for ELO usb touchscreen 4000/4500 * * Copyright (c) 2013 Jiri Slaby * * Data parsing taken from elousb driver by Vojtech Pavlik. - * - * This driver is licensed under the terms of GPLv2. */ #include <linux/hid.h> @@ -42,6 +41,12 @@ static int elo_input_configured(struct hid_device *hdev, { struct input_dev *input = hidinput->input; + /* + * ELO devices have one Button usage in GenDesk field, which makes + * hid-input map it to BTN_LEFT; that confuses userspace, which then + * considers the device to be a mouse/touchpad instead of touchscreen. + */ + clear_bit(BTN_LEFT, input->keybit); set_bit(BTN_TOUCH, input->keybit); set_bit(ABS_PRESSURE, input->absbit); input_set_abs_params(input, ABS_PRESSURE, 0, 256, 0, 0); @@ -224,6 +229,9 @@ static int elo_probe(struct hid_device *hdev, const struct hid_device_id *id) struct elo_priv *priv; int ret; + if (!hid_is_usb(hdev)) + return -EINVAL; + priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; @@ -305,4 +313,5 @@ static void __exit elo_driver_exit(void) module_exit(elo_driver_exit); MODULE_AUTHOR("Jiri Slaby <jslaby@suse.cz>"); +MODULE_DESCRIPTION("HID driver for ELO usb touchscreen 4000/4500"); MODULE_LICENSE("GPL"); |