HID: ite: Add hid-ite driver

[linux-2.6-microblaze.git] / drivers / hid / hid-ite.c

diff --git a/drivers/hid/hid-ite.c b/drivers/hid/hid-ite.c
new file mode 100644 (file)
index 0000000..1882a4a
--- /dev/null
+++ b/drivers/hid/hid-ite.c
@@ -0,0 +1,56 @@
+/*
+ * HID driver for some ITE "special" devices
+ * Copyright (c) 2017 Hans de Goede <hdegoede@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+static int ite_event(struct hid_device *hdev, struct hid_field *field,
+                    struct hid_usage *usage, __s32 value)
+{
+       struct input_dev *input;
+
+       if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)
+               return 0;
+
+       input = field->hidinput->input;
+
+       /*
+        * The ITE8595 always reports 0 as value for the rfkill button. Luckily
+        * it is the only button in its report, and it sends a report on
+        * release only, so receiving a report means the button was pressed.
+        */
+       if (usage->hid == HID_GD_RFKILL_BTN) {
+               input_event(input, EV_KEY, KEY_RFKILL, 1);
+               input_sync(input);
+               input_event(input, EV_KEY, KEY_RFKILL, 0);
+               input_sync(input);
+               return 1;
+       }
+
+       return 0;
+}
+
+static const struct hid_device_id ite_devices[] = {
+       { HID_USB_DEVICE(USB_VENDOR_ID_ITE, USB_DEVICE_ID_ITE8595) },
+       { }
+};
+MODULE_DEVICE_TABLE(hid, ite_devices);
+
+static struct hid_driver ite_driver = {
+       .name = "itetech",
+       .id_table = ite_devices,
+       .event = ite_event,
+};
+module_hid_driver(ite_driver);
+
+MODULE_LICENSE("GPL");