diff options
| author | Niels Skou Olsen <nolsen@jabra.com> | 2017-10-04 12:31:22 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2017-11-21 12:54:58 +0100 |
| commit | 19ca28271c9a361629eb06382a43f355249de7ea (patch) | |
| tree | 2ac21dc87d72be0d3e9c852f5521b29a3dae9b6b /drivers/hid/hid-jabra.c | |
| parent | d5158e020c45936d0ea5a1ce1e49a45da6e76f44 (diff) | |
HID: Add special driver for Jabra devices
Add a hid-jabra driver to the list of special drivers in hid-core. The
driver prevents vendor defined HID usages (FF00-FFFF) in Jabra devices
from being mapped to input events, that become unintended mouse events
in the X11 server.
Signed-off-by: Niels Skou Olsen <nolsen@jabra.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-jabra.c')
| -rw-r--r-- | drivers/hid/hid-jabra.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/hid/hid-jabra.c b/drivers/hid/hid-jabra.c new file mode 100644 index 000000000000..1f52daf14426 --- /dev/null +++ b/drivers/hid/hid-jabra.c @@ -0,0 +1,58 @@ +/* + * Jabra USB HID Driver + * + * Copyright (c) 2017 Niels Skou Olsen <nolsen@jabra.com> + */ + +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + */ + +#include <linux/hid.h> +#include <linux/module.h> + +#include "hid-ids.h" + +#define HID_UP_VENDOR_DEFINED_MIN 0xff000000 +#define HID_UP_VENDOR_DEFINED_MAX 0xffff0000 + +static int jabra_input_mapping(struct hid_device *hdev, + struct hid_input *hi, + struct hid_field *field, + struct hid_usage *usage, + unsigned long **bit, int *max) +{ + int is_vendor_defined = + ((usage->hid & HID_USAGE_PAGE) >= HID_UP_VENDOR_DEFINED_MIN && + (usage->hid & HID_USAGE_PAGE) <= HID_UP_VENDOR_DEFINED_MAX); + + dbg_hid("hid=0x%08x appl=0x%08x coll_idx=0x%02x usage_idx=0x%02x: %s\n", + usage->hid, + field->application, + usage->collection_index, + usage->usage_index, + is_vendor_defined ? "ignored" : "defaulted"); + + /* Ignore vendor defined usages, default map standard usages */ + return is_vendor_defined ? -1 : 0; +} + +static const struct hid_device_id jabra_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_JABRA, HID_ANY_ID) }, + { } +}; +MODULE_DEVICE_TABLE(hid, jabra_devices); + +static struct hid_driver jabra_driver = { + .name = "jabra", + .id_table = jabra_devices, + .input_mapping = jabra_input_mapping, +}; +module_hid_driver(jabra_driver); + +MODULE_AUTHOR("Niels Skou Olsen <nolsen@jabra.com>"); +MODULE_DESCRIPTION("Jabra USB HID Driver"); +MODULE_LICENSE("GPL"); |