[PATCH v3] input: Add support for Hanwang tablet

[Xing Wei]

From: Xing Wei  <weixing@xxxxxxxxxxxxxx>

Add support for Art Master III tablet of BeiJing HanwangTechnology Co, Ltd.

Signed-off-by: Xing Wei <weixing@xxxxxxxxxxxxxx>

---

Thanks for dmitry's comment & advice.
And I removed the part -- "Make sure to say Y to 'Mouse support(CONFIG_INPUT_MOUSEDEV)' and/or 'Event interface support'
(CONFIG_INPUT_EVDEV) as well" in the Kconfig.

diff -uprN -X linux-2.6.35.3-vanilla/Documentation/dontdiff linux-2.6.35.3-vanilla/drivers/hid/hid-core.c devel/linux-2.6.35.3/drivers/hid/hid-core.c
--- linux-2.6.35.3-vanilla/drivers/hid/hid-core.c	2010-08-21 02:55:55.000000000 +0800
+++ devel/linux-2.6.35.3/drivers/hid/hid-core.c	2010-08-25 18:02:15.942574998 +0800
@@ -1759,6 +1759,11 @@ static bool hid_ignore(struct hid_device
 		    hdev->product <= USB_DEVICE_ID_SOUNDGRAPH_IMON_LAST)
 			return true;
 		break;
+	case USB_VENDOR_ID_HANWANG:
+		if (hdev->product >= USB_DEVICE_ID_HANWANG_TABLET_FIRST &&
+		    hdev->product <= USB_DEVICE_ID_HANWANG_TABLET_LAST)
+			return true;
+		break;
 	}
 
 	if (hdev->type == HID_TYPE_USBMOUSE &&
diff -uprN -X linux-2.6.35.3-vanilla/Documentation/dontdiff linux-2.6.35.3-vanilla/drivers/hid/hid-ids.h devel/linux-2.6.35.3/drivers/hid/hid-ids.h
--- linux-2.6.35.3-vanilla/drivers/hid/hid-ids.h	2010-08-21 02:55:55.000000000 +0800
+++ devel/linux-2.6.35.3/drivers/hid/hid-ids.h	2010-08-25 18:00:21.416574999 +0800
@@ -526,5 +526,8 @@
 #define USB_DEVICE_ID_KYE_ERGO_525V	0x0087
 #define USB_DEVICE_ID_KYE_GPEN_560	0x5003
 
+#define USB_VENDOR_ID_HANWANG		0x0b57
+#define USB_DEVICE_ID_HANWANG_TABLET_FIRST	0x5000
+#define USB_DEVICE_ID_HANWANG_TABLET_LAST	0x8fff
 
 #endif
diff -uprN -X linux-2.6.35.3-vanilla/Documentation/dontdiff linux-2.6.35.3-vanilla/drivers/input/tablet/hanwang.c devel/linux-2.6.35.3/drivers/input/tablet/hanwang.c
--- linux-2.6.35.3-vanilla/drivers/input/tablet/hanwang.c	1970-01-01 08:00:00.000000000 +0800
+++ devel/linux-2.6.35.3/drivers/input/tablet/hanwang.c	2010-08-31 15:58:00.892882002 +0800
@@ -0,0 +1,359 @@
+/*
+ *  USB Hanwang tablet support
+ *
+ *  Copyright (c) 2010 Xing Wei <weixing@xxxxxxxxxxxxxx>
+ *
+ */
+
+/*
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb/input.h>
+
+#define DRIVER_AUTHOR   "Xing Wei <weixing@xxxxxxxxxxxxxx>"
+#define DRIVER_DESC     "USB Hanwang tablet driver"
+#define DRIVER_LICENSE  "GPL"
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);
+
+#define USB_VENDOR_ID_HANWANG		0x0b57
+#define HANWANG_TABLET_INT_CLASS	0x0003
+#define HANWANG_TABLET_INT_SUB_CLASS	0x0001
+#define HANWANG_TABLET_INT_PROTOCOL	0x0002
+
+#define ART_MASTERIII_PKGLEN_MAX	10
+
+/* match vendor and interface info  */
+#define HANWANG_TABLET_DEVICE(vend, cl, sc, pr) \
+	.match_flags = USB_DEVICE_ID_MATCH_VENDOR \
+		| USB_DEVICE_ID_MATCH_INT_INFO, \
+	.idVendor = (vend), \
+	.bInterfaceClass = (cl), \
+	.bInterfaceSubClass = (sc), \
+	.bInterfaceProtocol = (pr)
+
+struct hanwang_state {
+	unsigned int tool_style;
+	unsigned int tool_state;
+};
+struct hanwang {
+	char name[64];
+	unsigned char *data;
+	dma_addr_t data_dma;
+	struct input_dev *dev;
+	struct usb_device *usbdev;
+	struct urb *irq;
+	const struct hanwang_features *features;
+	struct hanwang_state hws;
+	char phys[32];
+};
+
+struct hanwang_features {
+	unsigned short pid;
+	int pkg_len;
+	char *name;
+	int max_x;
+	int max_y;
+	int max_tilt_x;
+	int max_tilt_y;
+	int max_pressure;
+	int max_distance;
+};
+
+
+static const struct hanwang_features features_array[] = {
+	{0x8528, ART_MASTERIII_PKGLEN_MAX, "Hanwang Art Master III 0906",
+	0x5757, 0x3692, 0x3f, 0x7f, 2048, 0xff},
+	{0x8529, ART_MASTERIII_PKGLEN_MAX, "Hanwang Art Master III 0604",
+	0x3d84, 0x2672, 0x3f, 0x7f, 2048, 0xff},
+	{0x852a, ART_MASTERIII_PKGLEN_MAX, "Hanwang Art Master III 1308",
+	0x7f00, 0x4f60, 0x3f, 0x7f, 2048, 0xff},
+};
+
+static const int hw_eventtypes[] = {
+	EV_KEY, EV_ABS,
+};
+
+static const int hw_absevents[] = {
+	ABS_X, ABS_Y, ABS_TILT_X, ABS_TILT_Y, ABS_WHEEL,
+	ABS_PRESSURE, ABS_DISTANCE
+};
+
+static const int hw_btnevents[] = {
+	BTN_STYLUS, BTN_STYLUS2, BTN_TOOL_PEN, BTN_TOOL_RUBBER,
+	BTN_TOOL_MOUSE, BTN_0, BTN_1, BTN_2, BTN_3, BTN_4,
+	BTN_5, BTN_6, BTN_7, BTN_8
+};
+
+static struct usb_device_id hanwang_ids[] = {
+	{HANWANG_TABLET_DEVICE(USB_VENDOR_ID_HANWANG, HANWANG_TABLET_INT_CLASS,
+		HANWANG_TABLET_INT_SUB_CLASS, HANWANG_TABLET_INT_PROTOCOL)},
+	{}
+};
+
+MODULE_DEVICE_TABLE(usb, hanwang_ids);
+
+static int hanwang_open(struct input_dev *dev)
+{
+	struct hanwang *hanwang = input_get_drvdata(dev);
+
+	hanwang->irq->dev = hanwang->usbdev;
+	if (usb_submit_urb(hanwang->irq, GFP_KERNEL))
+		return -EIO;
+
+	return 0;
+}
+
+static void hanwang_close(struct input_dev *dev)
+{
+	struct hanwang *hanwang = input_get_drvdata(dev);
+
+	usb_kill_urb(hanwang->irq);
+}
+
+static void hanwang_irq(struct urb *urb)
+{
+
+	struct hanwang *hanwang = urb->context;
+	unsigned char *data = hanwang->data;
+	struct input_dev *input_dev = hanwang->dev;
+	struct usb_device *dev = hanwang->usbdev;
+	struct hanwang_state *phws = &hanwang->hws;
+	int retval;
+
+	switch (urb->status) {
+	case 0:
+		/* success */;
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* this urb is terminated, clean up */
+		dev_err(&dev->dev, "%s - urb shutting down with status: %d",
+				__func__, urb->status);
+		return;
+	default:
+		dev_err(&dev->dev, "%s - nonzero urb status received: %d",
+				__func__, urb->status);
+		goto exit;
+	}
+
+	/* data packet */
+	if (data[0] == 0x02) {
+		/* tool prox out */
+		if (data[1] == 0x80) {
+			input_report_key(input_dev, phws->tool_style, 0);
+		} else if (data[1] == 0xc2) {	/* first time tool prox in */
+			switch (data[3] & 0xf0) {
+			case 0x20:
+				phws->tool_style = BTN_TOOL_PEN;
+				input_report_key(input_dev, BTN_TOOL_PEN, 1);
+				break;
+			case 0xa0:
+				phws->tool_style = BTN_TOOL_RUBBER;
+				input_report_key(input_dev, BTN_TOOL_RUBBER, 1);
+				break;
+			default:
+				dev_dbg(&dev->dev, "unknown tablet tool %02x ", data[0]);
+				break;
+			}
+		} else {	/* tool data packet */
+			input_report_abs(input_dev, ABS_X, (data[2] << 8) | data[3]);
+			input_report_abs(input_dev, ABS_Y, (data[4] << 8) | data[5]);
+			input_report_abs(input_dev, ABS_PRESSURE, (data[6] << 3) |
+						((data[7] & 0xc0) >> 5) |
+						(data[1] & 0x01));
+			input_report_abs(input_dev, ABS_TILT_X, data[7] & 0x3f);
+			input_report_abs(input_dev, ABS_TILT_Y, data[8] & 0x7f);
+			input_report_key(input_dev, BTN_STYLUS,
+				(data[1] & 0x02) >> 1);
+			input_report_key(input_dev, BTN_STYLUS2,
+				(data[1] & 0x04) >> 2);
+		}
+	} else if (data[0] == 0x0c) {	/* roll wheel */
+		if (data[1])
+			input_report_abs(input_dev, ABS_WHEEL, data[1]);
+		input_report_key(input_dev, BTN_0, data[2]);
+		input_report_key(input_dev, BTN_1, data[3] & 0x01);
+		input_report_key(input_dev, BTN_2, data[3] & 0x02);
+		input_report_key(input_dev, BTN_3, data[3] & 0x04);
+		input_report_key(input_dev, BTN_4, data[3] & 0x08);
+		input_report_key(input_dev, BTN_5, data[3] & 0x10);
+		input_report_key(input_dev, BTN_6, data[3] & 0x20);
+		input_report_key(input_dev, BTN_7, data[3] & 0x30);
+		input_report_key(input_dev, BTN_8, data[3] & 0x40);
+	} else {
+		dev_dbg(&dev->dev, "error packet  %02x ", data[0]);
+	}
+
+	input_sync(input_dev);
+
+exit:
+	retval = usb_submit_urb(urb, GFP_ATOMIC);
+	if (retval)
+		dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d",
+				__func__, retval);
+}
+
+static bool get_features(struct usb_device *dev, struct hanwang *hanwang)
+{
+	int i, total_features;
+
+	total_features = ARRAY_SIZE(features_array);
+	for (i = 0; i < total_features; i++) {
+		if (le16_to_cpu(dev->descriptor.idProduct) ==
+				features_array[i].pid) {
+			hanwang->features = &features_array[i];
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+
+static int hanwang_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct usb_endpoint_descriptor *endpoint;
+	struct hanwang *hanwang;
+	struct input_dev *input_dev;
+	int error = -ENOMEM;
+	int i;
+
+	hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!hanwang || !input_dev)
+		goto fail1;
+
+	if (!get_features(dev, hanwang))
+		goto fail1;
+
+	hanwang->data = usb_alloc_coherent(dev, hanwang->features->pkg_len,
+					GFP_KERNEL, &hanwang->data_dma);
+	if (!hanwang->data)
+		goto fail1;
+
+	hanwang->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!hanwang->irq)
+		goto fail2;
+
+	hanwang->usbdev = dev;
+	hanwang->dev = input_dev;
+
+	usb_make_path(dev, hanwang->phys, sizeof(hanwang->phys));
+	strlcat(hanwang->phys, "/input0", sizeof(hanwang->phys));
+
+	strlcpy(hanwang->name, hanwang->features->name, sizeof(hanwang->name));
+	input_dev->name = hanwang->name;
+	input_dev->phys = hanwang->phys;
+	usb_to_input_id(dev, &input_dev->id);
+	input_dev->dev.parent = &intf->dev;
+
+	input_set_drvdata(input_dev, hanwang);
+
+	input_dev->open = hanwang_open;
+	input_dev->close = hanwang_close;
+
+	for (i = 0; i < ARRAY_SIZE(hw_eventtypes); ++i)
+		__set_bit(hw_eventtypes[i], input_dev->evbit);
+
+	for (i = 0; i < ARRAY_SIZE(hw_absevents); ++i)
+		__set_bit(hw_absevents[i], input_dev->absbit);
+
+	for (i = 0; i < ARRAY_SIZE(hw_btnevents); ++i)
+		__set_bit(hw_btnevents[i], input_dev->keybit);
+
+	input_set_abs_params(input_dev, ABS_X, 0,
+			hanwang->features->max_x, 4, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0,
+			hanwang->features->max_y, 4, 0);
+	input_set_abs_params(input_dev, ABS_TILT_X, 0,
+			hanwang->features->max_tilt_x, 0, 0);
+	input_set_abs_params(input_dev, ABS_TILT_Y, 0,
+			hanwang->features->max_tilt_y, 0, 0);
+	input_set_abs_params(input_dev, ABS_PRESSURE, 0,
+			hanwang->features->max_pressure, 0, 0);
+	input_set_abs_params(input_dev, ABS_DISTANCE, 0,
+			hanwang->features->max_distance, 0, 0);
+
+	endpoint = &intf->cur_altsetting->endpoint[0].desc;
+	usb_fill_int_urb(hanwang->irq, dev,
+			usb_rcvintpipe(dev, endpoint->bEndpointAddress),
+			hanwang->data, hanwang->features->pkg_len,
+			hanwang_irq, hanwang, endpoint->bInterval);
+	hanwang->irq->transfer_dma = hanwang->data_dma;
+	hanwang->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	error = input_register_device(hanwang->dev);
+	if (error)
+		goto fail3;
+
+	usb_set_intfdata(intf, hanwang);
+
+	return 0;
+
+ fail3:	usb_free_urb(hanwang->irq);
+ fail2:	usb_free_coherent(dev, hanwang->features->pkg_len,
+			hanwang->data, hanwang->data_dma);
+ fail1:	input_free_device(input_dev);
+	kfree(hanwang);
+	return error;
+
+}
+
+static void hanwang_disconnect(struct usb_interface *intf)
+{
+	struct hanwang *hanwang = usb_get_intfdata(intf);
+
+	usb_set_intfdata(intf, NULL);
+	if (hanwang) {
+		usb_kill_urb(hanwang->irq);
+		input_unregister_device(hanwang->dev);
+		usb_free_urb(hanwang->irq);
+		usb_free_coherent(interface_to_usbdev(intf),
+			hanwang->features->pkg_len, hanwang->data,
+			hanwang->data_dma);
+		kfree(hanwang);
+	}
+}
+
+static struct usb_driver hanwang_driver = {
+	.name =		"hanwang",
+	.probe =	hanwang_probe,
+	.disconnect =	hanwang_disconnect,
+	.id_table =	hanwang_ids,
+};
+
+static int __init hanwang_init(void)
+{
+	return usb_register(&hanwang_driver);
+}
+
+static void __exit hanwang_exit(void)
+{
+	usb_deregister(&hanwang_driver);
+}
+
+module_init(hanwang_init);
+module_exit(hanwang_exit);
diff -uprN -X linux-2.6.35.3-vanilla/Documentation/dontdiff linux-2.6.35.3-vanilla/drivers/input/tablet/Kconfig devel/linux-2.6.35.3/drivers/input/tablet/Kconfig
--- linux-2.6.35.3-vanilla/drivers/input/tablet/Kconfig	2010-08-21 02:55:55.000000000 +0800
+++ devel/linux-2.6.35.3/drivers/input/tablet/Kconfig	2010-08-31 10:03:31.613679001 +0800
@@ -49,6 +49,17 @@ config TABLET_USB_GTCO
           To compile this driver as a module, choose M here: the
           module will be called gtco.
 
+config TABLET_USB_HANWANG
+	tristate "Hanwang Art Master III tablet support (USB)"
+	depends on USB_ARCH_HAS_HCD
+	select USB
+	help
+	  Say Y here if you want to use the USB version of the Hanwang Art
+	  Master III tablet.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called hanwang.
+
 config TABLET_USB_KBTAB
 	tristate "KB Gear JamStudio tablet support (USB)"
 	depends on USB_ARCH_HAS_HCD
diff -uprN -X linux-2.6.35.3-vanilla/Documentation/dontdiff linux-2.6.35.3-vanilla/drivers/input/tablet/Makefile devel/linux-2.6.35.3/drivers/input/tablet/Makefile
--- linux-2.6.35.3-vanilla/drivers/input/tablet/Makefile	2010-08-21 02:55:55.000000000 +0800
+++ devel/linux-2.6.35.3/drivers/input/tablet/Makefile	2010-08-31 15:49:35.276547001 +0800
@@ -8,5 +8,6 @@ wacom-objs	:= wacom_wac.o wacom_sys.o
 obj-$(CONFIG_TABLET_USB_ACECAD)	+= acecad.o
 obj-$(CONFIG_TABLET_USB_AIPTEK)	+= aiptek.o
 obj-$(CONFIG_TABLET_USB_GTCO)	+= gtco.o
+obj-$(CONFIG_TABLET_USB_HANWANG) += hanwang.o
 obj-$(CONFIG_TABLET_USB_KBTAB)	+= kbtab.o
 obj-$(CONFIG_TABLET_USB_WACOM)	+= wacom.o

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