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authorNiels Skou Olsen <nolsen@jabra.com>2017-10-04 12:31:22 +0200
committerJiri Kosina <jkosina@suse.cz>2017-11-21 12:54:58 +0100
commit19ca28271c9a361629eb06382a43f355249de7ea (patch)
tree2ac21dc87d72be0d3e9c852f5521b29a3dae9b6b /drivers/hid/hid-jabra.c
parentd5158e020c45936d0ea5a1ce1e49a45da6e76f44 (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.c58
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");

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