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-rw-r--r--drivers/hid/hid-ezkey.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/drivers/hid/hid-ezkey.c b/drivers/hid/hid-ezkey.c
new file mode 100644
index 000000000..d14f91d78
--- /dev/null
+++ b/drivers/hid/hid-ezkey.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * HID driver for some ezkey "special" devices
+ *
+ * Copyright (c) 1999 Andreas Gal
+ * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
+ * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
+ * Copyright (c) 2006-2007 Jiri Kosina
+ * Copyright (c) 2008 Jiri Slaby
+ */
+
+/*
+ */
+
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+#define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c))
+#define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
+
+static int ez_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;
+
+ switch (usage->hid & HID_USAGE) {
+ case 0x230: ez_map_key(BTN_MOUSE); break;
+ case 0x231: ez_map_rel(REL_WHEEL); break;
+ /*
+ * this keyboard has a scrollwheel implemented in
+ * totally broken way. We map this usage temporarily
+ * to HWHEEL and handle it in the event quirk handler
+ */
+ case 0x232: ez_map_rel(REL_HWHEEL); break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+static int ez_event(struct hid_device *hdev, struct hid_field *field,
+ struct hid_usage *usage, __s32 value)
+{
+ if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
+ !usage->type)
+ return 0;
+
+ /* handle the temporary quirky mapping to HWHEEL */
+ if (usage->type == EV_REL && usage->code == REL_HWHEEL) {
+ struct input_dev *input = field->hidinput->input;
+ input_event(input, usage->type, REL_WHEEL, -value);
+ return 1;
+ }
+
+ return 0;
+}
+
+static const struct hid_device_id ez_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, ez_devices);
+
+static struct hid_driver ez_driver = {
+ .name = "ezkey",
+ .id_table = ez_devices,
+ .input_mapping = ez_input_mapping,
+ .event = ez_event,
+};
+module_hid_driver(ez_driver);
+
+MODULE_LICENSE("GPL");