build/patch/kernel/archive/meson64-5.10/hardkernel-0015-COMMON-input-touchscreen-Add-D-WAV-Multitouch.patch

From 7466fab49314ed98f8b1512acf3e6ecb97c95315 Mon Sep 17 00:00:00 2001
From: Hyeonki Hong <hhk7734@gmail.com>
Date: Thu, 5 Mar 2020 19:01:43 +0900
Subject: [PATCH 15/74] ODROID-COMMON: input/touchscreen: Add D-WAV Multitouch
 driver.

Change-Id: Ia1c8c29d3f69c6ba5d630279c4cc98119b68ab71
---
 drivers/hid/hid-ids.h                   |   6 +
 drivers/hid/hid-quirks.c                |   3 +
 drivers/input/touchscreen/Kconfig       |  10 +
 drivers/input/touchscreen/Makefile      |   1 +
 drivers/input/touchscreen/dwav-usb-mt.c | 554 ++++++++++++++++++++++++
 5 files changed, 574 insertions(+)
 create mode 100644 drivers/input/touchscreen/dwav-usb-mt.c

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 6f370e020feb..5775322fb5d4 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1294,4 +1294,10 @@
 #define USB_VENDOR_ID_SIGNOTEC			0x2133
 #define USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011	0x0018
 
+#define USB_DEVICE_ID_DWAV_MULTITOUCH	0x0005
+
+#define USB_VENDOR_ID_ODROID	0x16b4
+#define USB_DEVICE_ID_VU5	0x0704
+#define USB_DEVICE_ID_VU7PLUS	0x0705
+
 #endif
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index 934fc0a798d4..9cf96f48238e 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -845,6 +845,9 @@ static const struct hid_device_id hid_ignore_list[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_DPAD) },
 #endif
 	{ HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
+
+	{ HID_USB_DEVICE(USB_VENDOR_ID_ODROID, USB_DEVICE_ID_VU5) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_ODROID, USB_DEVICE_ID_VU7PLUS) },
 	{ }
 };
 
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 35c867b2d9a7..01d680a5736b 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -1322,4 +1322,14 @@ config TOUCHSCREEN_IQS5XX
 	  To compile this driver as a module, choose M here: the
 	  module will be called iqs5xx.
 
+config TOUCHSCREEN_DWAV_USB_MT
+	tristate "D-WAV Scientific USB MultiTouch"
+	depends on USB_ARCH_HAS_HCD
+	select USB
+	help
+	  Say Y here if you have a D-WAV Scientific USB(HID) based MultiTouch
+	  controller.
+
+	  module will be called dwav-usb-mt.
+
 endif
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 30d1e1b42492..4585f02ad833 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -111,3 +111,4 @@ obj-$(CONFIG_TOUCHSCREEN_COLIBRI_VF50)	+= colibri-vf50-ts.o
 obj-$(CONFIG_TOUCHSCREEN_RASPBERRYPI_FW)	+= raspberrypi-ts.o
 obj-$(CONFIG_TOUCHSCREEN_IQS5XX)	+= iqs5xx.o
 obj-$(CONFIG_TOUCHSCREEN_ZINITIX)	+= zinitix.o
+obj-$(CONFIG_TOUCHSCREEN_DWAV_USB_MT)	+= dwav-usb-mt.o
diff --git a/drivers/input/touchscreen/dwav-usb-mt.c b/drivers/input/touchscreen/dwav-usb-mt.c
new file mode 100644
index 000000000000..7ec8b6dd15fd
--- /dev/null
+++ b/drivers/input/touchscreen/dwav-usb-mt.c
@@ -0,0 +1,554 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * D-WAV Scientific USB(HID) MultiTouch Screen Driver(Based on usbtouchscreen.c)
+ *
+ * Copyright (C) Hardkernel, 2015
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+#include <linux/usb/input.h>
+#include <linux/hid.h>
+
+#include <linux/input/mt.h>
+
+#define USB_VENDOR_ID_DWAV	0x0eef	/* 800 x 480, 7" DWAV touch */
+#define USB_DEVICE_ID_VU7	0x0005
+
+#define USB_VENDOR_ID_ODROID	0x16b4
+#define	USB_DEVICE_ID_VU5	0x0704
+#define	USB_DEVICE_ID_VU7PLUS	0x0705
+
+enum	{
+	ODROID_VU7 = 0,	/* 800 x 480, 7" Touch */
+	ODROID_VU5,	/* 800 x 480, 5" Touch */
+	ODROID_VU7PLUS,	/* 1024 x 600, 7" Touch */
+};
+
+struct usbtouch_device_info	{
+	char	name[64];
+	int	max_x;
+	int	max_y;
+	int	max_press;
+	int	max_finger;
+};
+
+const struct usbtouch_device_info DEV_INFO[] = {
+	[ODROID_VU7] = {
+		.name = "ODROID VU7 MultiTouch(800x480)",
+		.max_x = 800,
+		.max_y = 480,
+		.max_press = 255,
+		.max_finger = 5,
+	},
+	[ODROID_VU5] = {
+		.name = "ODROID VU5 MultiTouch(800x480)",
+		.max_x = 800,
+		.max_y = 480,
+		.max_press = 255,
+		.max_finger = 5,
+	},
+	[ODROID_VU7PLUS] = {
+		.name = "ODROID VU7 Plus MultiTouch(1024x600)",
+		.max_x = 1024,
+		.max_y = 600,
+		.max_press = 255,
+		.max_finger = 5,
+	},
+};
+
+static const struct usb_device_id dwav_usb_mt_devices[] = {
+	{USB_DEVICE(USB_VENDOR_ID_DWAV,   USB_DEVICE_ID_VU7),
+		.driver_info = ODROID_VU7},
+	{USB_DEVICE(USB_VENDOR_ID_ODROID, USB_DEVICE_ID_VU5),
+		.driver_info = ODROID_VU5},
+	{USB_DEVICE(USB_VENDOR_ID_ODROID, USB_DEVICE_ID_VU7PLUS),
+		.driver_info = ODROID_VU7PLUS},
+	{}
+};
+
+struct dwav_raw {                   /* Total 25 bytes */
+	unsigned char   header;     /* frame header 0xAA*/
+	unsigned char   press;
+	/* Touch flag (1:valid touch data, 0:touch finished) */
+	unsigned short  x1;         /* 1st x */
+	unsigned short  y1;         /* 1st y */
+	unsigned char   end;
+	/* 1st touch finish flags 0xBB, RPI only uses the first 7 bytes */
+	unsigned char   ids;        /* touch ID(bit field) */
+	unsigned short  y2;
+	unsigned short  x2;
+	unsigned short  y3;
+	unsigned short  x3;
+	unsigned short  y4;
+	unsigned short  x4;
+	unsigned short  y5;
+	unsigned short  x5;
+	unsigned char   tail;       /* frame end 0xCC */
+};
+
+#define	TS_EVENT_UNKNOWN	0x00
+#define	TS_EVENT_PRESS		0x01
+#define	TS_EVENT_RELEASE	0x02
+
+struct	finger_t	{
+	unsigned int	status;	/* ts event type */
+	unsigned int	x;	/* ts data x */
+	unsigned int	y;	/* ts data y */
+}	__packed;
+
+struct dwav_usb_mt  {
+	char		name[128], phys[64];
+
+	int		dev_id;
+	/* for URB Data DMA */
+	dma_addr_t	data_dma;
+	unsigned char	*data;
+	int		data_size;
+
+	struct urb		*irq;
+	struct usb_interface	*interface;
+	struct input_dev	*input;
+
+	struct finger_t		*finger;
+};
+
+static void dwav_usb_mt_report(struct dwav_usb_mt *dwav_usb_mt)
+{
+	int	id, max_x, max_y, max_press, max_finger;
+
+	max_x = DEV_INFO[dwav_usb_mt->dev_id].max_x;
+	max_y = DEV_INFO[dwav_usb_mt->dev_id].max_y;
+	max_press = DEV_INFO[dwav_usb_mt->dev_id].max_press;
+	max_finger = DEV_INFO[dwav_usb_mt->dev_id].max_finger;
+
+	for (id = 0; id < max_finger; id++)	{
+
+		if (dwav_usb_mt->finger[id].status == TS_EVENT_UNKNOWN)
+			continue;
+
+		if (dwav_usb_mt->finger[id].x >= max_x ||
+		    dwav_usb_mt->finger[id].y >= max_y)
+			continue;
+
+		input_mt_slot(dwav_usb_mt->input, id);
+
+		if (dwav_usb_mt->finger[id].status != TS_EVENT_RELEASE) {
+			input_mt_report_slot_state(dwav_usb_mt->input,
+					MT_TOOL_FINGER, true);
+			input_report_abs(dwav_usb_mt->input,
+					ABS_MT_POSITION_X,
+					dwav_usb_mt->finger[id].x);
+			input_report_abs(dwav_usb_mt->input,
+					ABS_MT_POSITION_Y,
+					dwav_usb_mt->finger[id].y);
+			input_report_abs(dwav_usb_mt->input,
+					ABS_MT_PRESSURE,
+					max_press);
+		} else {
+			input_mt_report_slot_state(dwav_usb_mt->input,
+					MT_TOOL_FINGER, false);
+			dwav_usb_mt->finger[id].status = TS_EVENT_UNKNOWN;
+		}
+		input_mt_report_pointer_emulation(dwav_usb_mt->input, true);
+		input_sync(dwav_usb_mt->input);
+	}
+}
+
+static void dwav_usb_mt_process(struct dwav_usb_mt *dwav_usb_mt,
+		unsigned char *pkt, int len)
+{
+	struct  dwav_raw *dwav_raw = (struct dwav_raw *)pkt;
+	unsigned char bit_mask, cnt;
+
+	for (cnt = 0, bit_mask = 0x01;
+	     cnt < DEV_INFO[dwav_usb_mt->dev_id].max_finger;
+	     cnt++, bit_mask <<= 1) {
+		if ((dwav_raw->ids & bit_mask) && dwav_raw->press) {
+			dwav_usb_mt->finger[cnt].status = TS_EVENT_PRESS;
+			switch (cnt) {
+			case	0:
+				dwav_usb_mt->finger[cnt].x
+					= cpu_to_be16(dwav_raw->x1);
+				dwav_usb_mt->finger[cnt].y
+					= cpu_to_be16(dwav_raw->y1);
+				break;
+			case	1:
+				dwav_usb_mt->finger[cnt].x
+					= cpu_to_be16(dwav_raw->x2);
+				dwav_usb_mt->finger[cnt].y
+					= cpu_to_be16(dwav_raw->y2);
+				break;
+			case	2:
+				dwav_usb_mt->finger[cnt].x
+					= cpu_to_be16(dwav_raw->x3);
+				dwav_usb_mt->finger[cnt].y
+					= cpu_to_be16(dwav_raw->y3);
+				break;
+			case	3:
+				dwav_usb_mt->finger[cnt].x
+					= cpu_to_be16(dwav_raw->x4);
+				dwav_usb_mt->finger[cnt].y
+					= cpu_to_be16(dwav_raw->y4);
+				break;
+			case	4:
+				dwav_usb_mt->finger[cnt].x
+					= cpu_to_be16(dwav_raw->x5);
+				dwav_usb_mt->finger[cnt].y
+					= cpu_to_be16(dwav_raw->y5);
+				break;
+			default:
+				break;
+			}
+		} else {
+			if (dwav_usb_mt->finger[cnt].status == TS_EVENT_PRESS)
+				dwav_usb_mt->finger[cnt].status
+					= TS_EVENT_RELEASE;
+			else
+				dwav_usb_mt->finger[cnt].status
+					= TS_EVENT_UNKNOWN;
+		}
+	}
+	dwav_usb_mt_report(dwav_usb_mt);
+}
+
+static void dwav_usb_mt_irq(struct urb *urb)
+{
+	struct dwav_usb_mt *dwav_usb_mt = urb->context;
+	struct device *dev = &dwav_usb_mt->interface->dev;
+	int retval;
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		break;
+	case -ETIME:
+		/* this urb is timing out */
+		dev_dbg(dev, "%s - urb timed out - was the device unplugged?\n",
+				__func__);
+		return;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+	case -EPIPE:
+		/* this urb is terminated, clean up */
+		dev_dbg(dev, "%s - urb shutting down with status: %d\n",
+				__func__, urb->status);
+		return;
+	default:
+		dev_dbg(dev, "%s - nonzero urb status received: %d\n",
+				__func__, urb->status);
+		goto exit;
+	}
+
+	dwav_usb_mt_process(dwav_usb_mt, dwav_usb_mt->data, urb->actual_length);
+
+exit:
+	usb_mark_last_busy(interface_to_usbdev(dwav_usb_mt->interface));
+	retval = usb_submit_urb(urb, GFP_ATOMIC);
+	if (retval) {
+		dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
+				__func__, retval);
+	}
+}
+
+static int dwav_usb_mt_open(struct input_dev *input)
+{
+	struct dwav_usb_mt *dwav_usb_mt = input_get_drvdata(input);
+	int r;
+
+	dwav_usb_mt->irq->dev = interface_to_usbdev(dwav_usb_mt->interface);
+
+	r = usb_autopm_get_interface(dwav_usb_mt->interface) ? -EIO : 0;
+	if (r < 0)
+		goto out;
+
+	if (usb_submit_urb(dwav_usb_mt->irq, GFP_KERNEL)) {
+		r = -EIO;
+		goto out_put;
+	}
+
+	dwav_usb_mt->interface->needs_remote_wakeup = 1;
+out_put:
+	usb_autopm_put_interface(dwav_usb_mt->interface);
+out:
+	return r;
+}
+
+static void dwav_usb_mt_close(struct input_dev *input)
+{
+	struct dwav_usb_mt *dwav_usb_mt = input_get_drvdata(input);
+	int r;
+
+	usb_kill_urb(dwav_usb_mt->irq);
+
+	r = usb_autopm_get_interface(dwav_usb_mt->interface);
+
+	dwav_usb_mt->interface->needs_remote_wakeup = 0;
+	if (!r)
+		usb_autopm_put_interface(dwav_usb_mt->interface);
+}
+
+static int dwav_usb_mt_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct dwav_usb_mt *dwav_usb_mt = usb_get_intfdata(intf);
+
+	usb_kill_urb(dwav_usb_mt->irq);
+
+	return 0;
+}
+
+static int dwav_usb_mt_resume(struct usb_interface *intf)
+{
+	struct dwav_usb_mt *dwav_usb_mt = usb_get_intfdata(intf);
+	struct input_dev *input = dwav_usb_mt->input;
+	int result = 0;
+
+	mutex_lock(&input->mutex);
+	if (input->users)
+		result = usb_submit_urb(dwav_usb_mt->irq, GFP_NOIO);
+	mutex_unlock(&input->mutex);
+
+	return result;
+}
+
+static int dwav_usb_mt_reset_resume(struct usb_interface *intf)
+{
+	struct dwav_usb_mt *dwav_usb_mt = usb_get_intfdata(intf);
+	struct input_dev *input = dwav_usb_mt->input;
+	int err = 0;
+
+	/* restart IO if needed */
+	mutex_lock(&input->mutex);
+	if (input->users)
+		err = usb_submit_urb(dwav_usb_mt->irq, GFP_NOIO);
+	mutex_unlock(&input->mutex);
+
+	return err;
+}
+
+static void dwav_usb_mt_free_buffers(struct usb_device *udev,
+				  struct dwav_usb_mt *dwav_usb_mt)
+{
+	usb_free_coherent(udev, dwav_usb_mt->data_size,
+			dwav_usb_mt->data, dwav_usb_mt->data_dma);
+}
+
+static struct usb_endpoint_descriptor *dwav_usb_mt_get_input_endpoint(
+		struct usb_host_interface *interface)
+{
+	int i;
+
+	for (i = 0; i < interface->desc.bNumEndpoints; i++) {
+		if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
+			return &interface->endpoint[i].desc;
+	}
+
+	return NULL;
+}
+
+static int dwav_usb_mt_init(struct dwav_usb_mt *dwav_usb_mt, void *dev)
+{
+	int err;
+	struct input_dev *input_dev = (struct input_dev *)dev;
+
+	input_dev->name = dwav_usb_mt->name;
+	input_dev->phys = dwav_usb_mt->phys;
+
+	input_set_drvdata(input_dev, dwav_usb_mt);
+
+	input_dev->open = dwav_usb_mt_open;
+	input_dev->close = dwav_usb_mt_close;
+
+	input_dev->id.bustype = BUS_USB;
+
+	/* single touch */
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+
+	input_set_abs_params(input_dev, ABS_X, 0,
+			     DEV_INFO[dwav_usb_mt->dev_id].max_x, 0, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0,
+			     DEV_INFO[dwav_usb_mt->dev_id].max_y, 0, 0);
+
+	/* multi touch */
+	input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0,
+			     DEV_INFO[dwav_usb_mt->dev_id].max_x, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0,
+			     DEV_INFO[dwav_usb_mt->dev_id].max_y, 0, 0);
+	input_mt_init_slots(input_dev,
+			     DEV_INFO[dwav_usb_mt->dev_id].max_finger, 0);
+
+	err = input_register_device(input_dev);
+	if (err) {
+		pr_err("%s - input_register_device failed, err: %d\n",
+				__func__, err);
+		return  err;
+	}
+
+	dwav_usb_mt->input = input_dev;
+
+	return  0;
+}
+
+static int dwav_usb_mt_probe(struct usb_interface *intf,
+			  const struct usb_device_id *id)
+{
+	struct dwav_usb_mt *dwav_usb_mt = NULL;
+	struct input_dev *input_dev = NULL;
+	struct usb_endpoint_descriptor *endpoint;
+	struct usb_device *udev = interface_to_usbdev(intf);
+
+	int err = 0;
+
+	endpoint = dwav_usb_mt_get_input_endpoint(intf->cur_altsetting);
+	if (!endpoint)
+		return  -ENXIO;
+
+	dwav_usb_mt = kzalloc(sizeof(struct dwav_usb_mt), GFP_KERNEL);
+	if (!dwav_usb_mt)
+		return  -ENOMEM;
+
+	dwav_usb_mt->dev_id = id->driver_info;
+
+	dwav_usb_mt->finger = kzalloc(sizeof(struct finger_t) *
+				      DEV_INFO[dwav_usb_mt->dev_id].max_finger,
+				      GFP_KERNEL);
+
+	if (!dwav_usb_mt->finger)
+		goto err_free_mem;
+
+	input_dev = input_allocate_device();
+	if (!input_dev)
+		goto err_free_mem;
+
+	dwav_usb_mt->data_size = sizeof(struct dwav_raw);
+	dwav_usb_mt->data = usb_alloc_coherent(udev, dwav_usb_mt->data_size,
+			GFP_KERNEL, &dwav_usb_mt->data_dma);
+	if (!dwav_usb_mt->data)
+		goto err_free_mem;
+
+	dwav_usb_mt->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!dwav_usb_mt->irq) {
+		dev_dbg(&intf->dev,
+				"%s - usb_alloc_urb failed: usbtouch->irq\n",
+				__func__);
+		goto err_free_buffers;
+	}
+
+	if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)   {
+		usb_fill_int_urb(dwav_usb_mt->irq, udev,
+			usb_rcvintpipe(udev, endpoint->bEndpointAddress),
+			dwav_usb_mt->data, dwav_usb_mt->data_size,
+			dwav_usb_mt_irq, dwav_usb_mt, endpoint->bInterval);
+	} else {
+		usb_fill_bulk_urb(dwav_usb_mt->irq, udev,
+			 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
+			 dwav_usb_mt->data, dwav_usb_mt->data_size,
+			 dwav_usb_mt_irq, dwav_usb_mt);
+	}
+
+	dwav_usb_mt->irq->dev = udev;
+	dwav_usb_mt->irq->transfer_dma = dwav_usb_mt->data_dma;
+	dwav_usb_mt->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	dwav_usb_mt->interface  = intf;
+
+	if (udev->manufacturer)
+		strlcpy(dwav_usb_mt->name,
+				udev->manufacturer, sizeof(dwav_usb_mt->name));
+
+	if (udev->product) {
+		if (udev->manufacturer)
+			strlcat(dwav_usb_mt->name,
+					" ", sizeof(dwav_usb_mt->name));
+
+		strlcat(dwav_usb_mt->name,
+				udev->product, sizeof(dwav_usb_mt->name));
+	}
+
+	if (!strlen(dwav_usb_mt->name)) {
+		snprintf(dwav_usb_mt->name, sizeof(dwav_usb_mt->name),
+				"D-WAV Scientific MultiTouch %04x:%04x",
+				le16_to_cpu(udev->descriptor.idVendor),
+				le16_to_cpu(udev->descriptor.idProduct));
+	}
+
+	usb_make_path(udev, dwav_usb_mt->phys, sizeof(dwav_usb_mt->phys));
+	strlcat(dwav_usb_mt->phys, "/input0", sizeof(dwav_usb_mt->phys));
+
+	usb_to_input_id(udev, &input_dev->id);
+
+	input_dev->dev.parent = &intf->dev;
+
+	err = dwav_usb_mt_init(dwav_usb_mt, (void *)input_dev);
+	if (err)
+		goto err_free_urb;
+
+	usb_set_intfdata(intf, dwav_usb_mt);
+
+	dev_info(&intf->dev, "%s\n", DEV_INFO[dwav_usb_mt->dev_id].name);
+
+	return 0;
+
+err_free_urb:
+	usb_free_urb(dwav_usb_mt->irq);
+
+err_free_buffers:
+	dwav_usb_mt_free_buffers(udev, dwav_usb_mt);
+
+err_free_mem:
+	if (input_dev)
+		input_free_device(input_dev);
+	kfree(dwav_usb_mt);
+
+	return err;
+}
+
+static void dwav_usb_mt_disconnect(struct usb_interface *intf)
+{
+	struct dwav_usb_mt *dwav_usb_mt = usb_get_intfdata(intf);
+
+	if (!dwav_usb_mt)
+		return;
+
+	dev_dbg(&intf->dev,
+			"%s - dwav_usb_mt is initialized, cleaning up\n",
+			__func__);
+
+	usb_set_intfdata(intf, NULL);
+
+	/* this will stop IO via close */
+	input_unregister_device(dwav_usb_mt->input);
+
+	usb_free_urb(dwav_usb_mt->irq);
+
+	dwav_usb_mt_free_buffers(interface_to_usbdev(intf), dwav_usb_mt);
+
+	kfree(dwav_usb_mt);
+}
+
+MODULE_DEVICE_TABLE(usb, dwav_usb_mt_devices);
+
+static struct usb_driver dwav_usb_mt_driver = {
+	.name = "dwav_usb_mt",
+	.probe = dwav_usb_mt_probe,
+	.disconnect = dwav_usb_mt_disconnect,
+	.suspend = dwav_usb_mt_suspend,
+	.resume = dwav_usb_mt_resume,
+	.reset_resume = dwav_usb_mt_reset_resume,
+	.id_table = dwav_usb_mt_devices,
+	.supports_autosuspend = 1,
+};
+
+module_usb_driver(dwav_usb_mt_driver);
+
+MODULE_AUTHOR("Hardkernel Co.,Ltd");
+MODULE_DESCRIPTION("D-WAV USB(HID) MultiTouch Driver");
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS("dwav_usb_mt");
\ No newline at end of file
-- 
2.25.1