diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 69f3420..01456b1 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -82,6 +82,13 @@
 
 	If unsure, say Y.
 
+config HID_A4TECH
+	tristate "A4 tech"
+	default m
+	depends on USB_HID
+	---help---
+	Support for A4 tech X5 and WOP-35 / Trust 450L mice.
+
 config HID_APPLE
 	tristate "Apple"
 	default m
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 0610662..ceede11 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -12,6 +12,7 @@
 obj-m				+= hid-dummy.o
 endif
 
+obj-$(CONFIG_HID_A4TECH)	+= hid-a4tech.o
 obj-$(CONFIG_HID_APPLE)		+= hid-apple.o
 obj-$(CONFIG_HID_CYPRESS)	+= hid-cypress.o
 obj-$(CONFIG_HID_LOGITECH)	+= hid-logitech.o
diff --git a/drivers/hid/hid-a4tech.c b/drivers/hid/hid-a4tech.c
new file mode 100644
index 0000000..26e16083
--- /dev/null
+++ b/drivers/hid/hid-a4tech.c
@@ -0,0 +1,162 @@
+/*
+ *  HID driver for some a4tech "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) 2007 Paul Walmsley
+ *  Copyright (c) 2008 Jiri Slaby
+ */
+
+/*
+ * 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/input.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+#define A4_2WHEEL_MOUSE_HACK_7	0x01
+#define A4_2WHEEL_MOUSE_HACK_B8	0x02
+
+struct a4tech_sc {
+	unsigned long quirks;
+	unsigned int hw_wheel;
+	__s32 delayed_value;
+};
+
+static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi,
+		struct hid_field *field, struct hid_usage *usage,
+		unsigned long **bit, int *max)
+{
+	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
+
+	if (usage->type == EV_REL && usage->code == REL_WHEEL)
+		set_bit(REL_HWHEEL, *bit);
+
+	if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007)
+		return -1;
+
+	return 0;
+}
+
+static int a4_event(struct hid_device *hdev, struct hid_field *field,
+		struct hid_usage *usage, __s32 value)
+{
+	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
+	struct input_dev *input;
+
+	if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
+			!usage->type)
+		return 0;
+
+	input = field->hidinput->input;
+
+	if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) {
+		if (usage->type == EV_REL && usage->code == REL_WHEEL) {
+			a4->delayed_value = value;
+			return 1;
+		}
+
+		if (usage->hid == 0x000100b8) {
+			input_event(input, EV_REL, value ? REL_HWHEEL :
+					REL_WHEEL, a4->delayed_value);
+			return 1;
+		}
+	}
+
+	if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) {
+		a4->hw_wheel = !!value;
+		return 1;
+	}
+
+	if (usage->code == REL_WHEEL && a4->hw_wheel) {
+		input_event(input, usage->type, REL_HWHEEL, value);
+		return 1;
+	}
+
+	return 0;
+}
+
+static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+	struct a4tech_sc *a4;
+	int ret;
+
+	a4 = kzalloc(sizeof(*a4), GFP_KERNEL);
+	if (a4 == NULL) {
+		dev_err(&hdev->dev, "can't alloc device descriptor\n");
+		ret = -ENOMEM;
+		goto err_free;
+	}
+
+	a4->quirks = id->driver_data;
+
+	hid_set_drvdata(hdev, a4);
+
+	ret = hid_parse(hdev);
+	if (ret) {
+		dev_err(&hdev->dev, "parse failed\n");
+		goto err_free;
+	}
+
+	ret = hid_hw_start(hdev);
+	if (ret) {
+		dev_err(&hdev->dev, "hw start failed\n");
+		goto err_free;
+	}
+
+	return 0;
+err_free:
+	kfree(a4);
+	return ret;
+}
+
+static void a4_remove(struct hid_device *hdev)
+{
+	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
+
+	hid_hw_stop(hdev);
+	kfree(a4);
+}
+
+static const struct hid_device_id a4_devices[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU),
+		.driver_data = A4_2WHEEL_MOUSE_HACK_7 },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D),
+		.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, a4_devices);
+
+static struct hid_driver a4_driver = {
+	.name = "a4tech",
+	.id_table = a4_devices,
+	.input_mapped = a4_input_mapped,
+	.event = a4_event,
+	.probe = a4_probe,
+	.remove = a4_remove,
+};
+
+static int a4_init(void)
+{
+	return hid_register_driver(&a4_driver);
+}
+
+static void a4_exit(void)
+{
+	hid_unregister_driver(&a4_driver);
+}
+
+module_init(a4_init);
+module_exit(a4_exit);
+MODULE_LICENSE("GPL");
+
+HID_COMPAT_LOAD_DRIVER(a4tech);
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 331670b..be58297 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1132,6 +1132,8 @@
 }
 
 static const struct hid_device_id hid_blacklist[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_ANSI) },
diff --git a/drivers/hid/hid-dummy.c b/drivers/hid/hid-dummy.c
index 27cffe3..123f1c7 100644
--- a/drivers/hid/hid-dummy.c
+++ b/drivers/hid/hid-dummy.c
@@ -4,6 +4,9 @@
 
 static int __init hid_dummy_init(void)
 {
+#ifdef CONFIG_HID_A4TECH_MODULE
+	HID_COMPAT_CALL_DRIVER(a4tech);
+#endif
 #ifdef CONFIG_HID_APPLE_MODULE
 	HID_COMPAT_CALL_DRIVER(apple);
 #endif
diff --git a/drivers/hid/hid-input-quirks.c b/drivers/hid/hid-input-quirks.c
index 6e7314f..5bacf18 100644
--- a/drivers/hid/hid-input-quirks.c
+++ b/drivers/hid/hid-input-quirks.c
@@ -236,31 +236,6 @@
 
 	input = field->hidinput->input;
 
-	if ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_7) &&
-			(usage->hid == 0x00090007)) {
-		if (value) hid->quirks |=  HID_QUIRK_2WHEEL_MOUSE_HACK_ON;
-		else       hid->quirks &= ~HID_QUIRK_2WHEEL_MOUSE_HACK_ON;
-		return 1;
-	}
-
-	if ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_B8) &&
-			(usage->type == EV_REL) &&
-			(usage->code == REL_WHEEL)) {
-		hid->delayed_value = value;
-		return 1;
-	}
-
-	if ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_B8) &&
-			(usage->hid == 0x000100b8)) {
-		input_event(input, EV_REL, value ? REL_HWHEEL : REL_WHEEL, hid->delayed_value);
-		return 1;
-	}
-
-	if ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_ON) && (usage->code == REL_WHEEL)) {
-		input_event(input, usage->type, REL_HWHEEL, value);
-		return 1;
-	}
-
 	/* handle the temporary quirky mapping to HWHEEL */
 	if (hid->quirks & HID_QUIRK_HWHEEL_WHEEL_INVERT &&
 			usage->type == EV_REL && usage->code == REL_HWHEEL) {
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index f1df25a..1d2d082 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -515,15 +515,6 @@
 				hidinput, field, usage, &bit, &max) < 0)
 		goto ignore;
 
-	if ((device->quirks & (HID_QUIRK_2WHEEL_MOUSE_HACK_7 |
-			HID_QUIRK_2WHEEL_MOUSE_HACK_B8)) && (usage->type == EV_REL) &&
-			(usage->code == REL_WHEEL))
-		set_bit(REL_HWHEEL, bit);
-
-	if ((device->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_7) &&
-			(usage->hid == 0x00090007))
-		goto ignore;
-
 	set_bit(usage->type, input->evbit);
 
 	while (usage->code <= max && test_and_set_bit(usage->code, bit))
diff --git a/drivers/hid/usbhid/hid-quirks.c b/drivers/hid/usbhid/hid-quirks.c
index da80c64..1d12fb2 100644
--- a/drivers/hid/usbhid/hid-quirks.c
+++ b/drivers/hid/usbhid/hid-quirks.c
@@ -28,10 +28,6 @@
 	__u16 idProduct;
 	__u32 quirks;
 } hid_blacklist[] = {
-
-	{ USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU, HID_QUIRK_2WHEEL_MOUSE_HACK_7 },
-	{ USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D, HID_QUIRK_2WHEEL_MOUSE_HACK_B8 },
-
 	{ USB_VENDOR_ID_AASHIMA, USB_DEVICE_ID_AASHIMA_GAMEPAD, HID_QUIRK_BADPAD },
 	{ USB_VENDOR_ID_AASHIMA, USB_DEVICE_ID_AASHIMA_PREDATOR, HID_QUIRK_BADPAD },
 	{ USB_VENDOR_ID_ALPS, USB_DEVICE_ID_IBM_GAMEPAD, HID_QUIRK_BADPAD },