[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/hid/hid-speedlink.c b/ap/os/linux/linux-3.4.x/drivers/hid/hid-speedlink.c
new file mode 100644
index 0000000..2b03c9b
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/hid/hid-speedlink.c
@@ -0,0 +1,94 @@
+/*
+ * HID driver for Speedlink Vicious and Divine Cezanne (USB mouse).
+ * Fixes "jumpy" cursor and removes nonexistent keyboard LEDS from
+ * the HID descriptor.
+ *
+ * Copyright (c) 2011, 2013 Stefan Kriwanek <dev@stefankriwanek.de>
+ */
+
+/*
+ * 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/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#include "hid-ids.h"
+#include "usbhid/usbhid.h"
+
+static const struct hid_device_id speedlink_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE)},
+ { }
+};
+
+static int speedlink_input_mapping(struct hid_device *hdev,
+ struct hid_input *hi,
+ struct hid_field *field, struct hid_usage *usage,
+ unsigned long **bit, int *max)
+{
+ /*
+ * The Cezanne mouse has a second "keyboard" USB endpoint for it is
+ * able to map keyboard events to the button presses.
+ * It sends a standard keyboard report descriptor, though, whose
+ * LEDs we ignore.
+ */
+ switch (usage->hid & HID_USAGE_PAGE) {
+ case HID_UP_LED:
+ return -1;
+ }
+ return 0;
+}
+
+static int speedlink_event(struct hid_device *hdev, struct hid_field *field,
+ struct hid_usage *usage, __s32 value)
+{
+ /* No other conditions due to usage_table. */
+
+ /* This fixes the "jumpy" cursor occuring due to invalid events sent
+ * by the device. Some devices only send them with value==+256, others
+ * don't. However, catching abs(value)>=256 is restrictive enough not
+ * to interfere with devices that were bug-free (has been tested).
+ */
+ if (abs(value) >= 256)
+ return 1;
+ /* Drop useless distance 0 events (on button clicks etc.) as well */
+ if (value == 0)
+ return 1;
+
+ return 0;
+}
+
+MODULE_DEVICE_TABLE(hid, speedlink_devices);
+
+static const struct hid_usage_id speedlink_grabbed_usages[] = {
+ { HID_GD_X, EV_REL, 0 },
+ { HID_GD_Y, EV_REL, 1 },
+ { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
+};
+
+static struct hid_driver speedlink_driver = {
+ .name = "speedlink",
+ .id_table = speedlink_devices,
+ .usage_table = speedlink_grabbed_usages,
+ .input_mapping = speedlink_input_mapping,
+ .event = speedlink_event,
+};
+
+static int __init speedlink_init(void)
+{
+ return hid_register_driver(&speedlink_driver);
+}
+
+static void __exit speedlink_exit(void)
+{
+ hid_unregister_driver(&speedlink_driver);
+}
+
+module_init(speedlink_init);
+module_exit(speedlink_exit);
+MODULE_LICENSE("GPL");