1 files changed, 443 insertions, 0 deletions

diff --git a/drivers/input/tablet/hanwang.c b/drivers/input/tablet/hanwang.c
new file mode 100644
index 0000000000..9bc631518b
--- /dev/null
+++ b/drivers/input/tablet/hanwang.c
@@ -0,0 +1,443 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  USB Hanwang tablet support
+ *
+ *  Copyright (c) 2010 Xing Wei <weixing@hanwang.com.cn>
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/usb/input.h>
+
+MODULE_AUTHOR("Xing Wei <weixing@hanwang.com.cn>");
+MODULE_DESCRIPTION("USB Hanwang tablet driver");
+MODULE_LICENSE("GPL");
+
+#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_MASTER_PKGLEN_MAX	10
+
+/* device IDs */
+#define STYLUS_DEVICE_ID	0x02
+#define TOUCH_DEVICE_ID		0x03
+#define CURSOR_DEVICE_ID	0x06
+#define ERASER_DEVICE_ID	0x0A
+#define PAD_DEVICE_ID		0x0F
+
+/* 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)
+
+enum hanwang_tablet_type {
+	HANWANG_ART_MASTER_III,
+	HANWANG_ART_MASTER_HD,
+	HANWANG_ART_MASTER_II,
+};
+
+struct hanwang {
+	unsigned char *data;
+	dma_addr_t data_dma;
+	struct input_dev *dev;
+	struct usb_device *usbdev;
+	struct urb *irq;
+	const struct hanwang_features *features;
+	unsigned int current_tool;
+	unsigned int current_id;
+	char name[64];
+	char phys[32];
+};
+
+struct hanwang_features {
+	unsigned short pid;
+	char *name;
+	enum hanwang_tablet_type type;
+	int pkg_len;
+	int max_x;
+	int max_y;
+	int max_tilt_x;
+	int max_tilt_y;
+	int max_pressure;
+};
+
+static const struct hanwang_features features_array[] = {
+	{ 0x8528, "Hanwang Art Master III 0906", HANWANG_ART_MASTER_III,
+	  ART_MASTER_PKGLEN_MAX, 0x5757, 0x3692, 0x3f, 0x7f, 2048 },
+	{ 0x8529, "Hanwang Art Master III 0604", HANWANG_ART_MASTER_III,
+	  ART_MASTER_PKGLEN_MAX, 0x3d84, 0x2672, 0x3f, 0x7f, 2048 },
+	{ 0x852a, "Hanwang Art Master III 1308", HANWANG_ART_MASTER_III,
+	  ART_MASTER_PKGLEN_MAX, 0x7f00, 0x4f60, 0x3f, 0x7f, 2048 },
+	{ 0x8401, "Hanwang Art Master HD 5012", HANWANG_ART_MASTER_HD,
+	  ART_MASTER_PKGLEN_MAX, 0x678e, 0x4150, 0x3f, 0x7f, 1024 },
+	{ 0x8503, "Hanwang Art Master II", HANWANG_ART_MASTER_II,
+	  ART_MASTER_PKGLEN_MAX, 0x27de, 0x1cfe, 0x3f, 0x7f, 1024 },
+};
+
+static const int hw_eventtypes[] = {
+	EV_KEY, EV_ABS, EV_MSC,
+};
+
+static const int hw_absevents[] = {
+	ABS_X, ABS_Y, ABS_TILT_X, ABS_TILT_Y, ABS_WHEEL,
+	ABS_RX, ABS_RY, ABS_PRESSURE, ABS_MISC,
+};
+
+static const int hw_btnevents[] = {
+	BTN_STYLUS, BTN_STYLUS2, BTN_TOOL_PEN, BTN_TOOL_RUBBER,
+	BTN_TOOL_MOUSE, BTN_TOOL_FINGER,
+	BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8,
+};
+
+static const int hw_mscevents[] = {
+	MSC_SERIAL,
+};
+
+static void hanwang_parse_packet(struct hanwang *hanwang)
+{
+	unsigned char *data = hanwang->data;
+	struct input_dev *input_dev = hanwang->dev;
+	struct usb_device *dev = hanwang->usbdev;
+	enum hanwang_tablet_type type = hanwang->features->type;
+	int i;
+	u16 p;
+
+	if (type == HANWANG_ART_MASTER_II) {
+		hanwang->current_tool = BTN_TOOL_PEN;
+		hanwang->current_id = STYLUS_DEVICE_ID;
+	}
+
+	switch (data[0]) {
+	case 0x02:	/* data packet */
+		switch (data[1]) {
+		case 0x80:	/* tool prox out */
+			if (type != HANWANG_ART_MASTER_II) {
+				hanwang->current_id = 0;
+				input_report_key(input_dev,
+						 hanwang->current_tool, 0);
+			}
+			break;
+
+		case 0x00:	/* artmaster ii pen leave */
+			if (type == HANWANG_ART_MASTER_II) {
+				hanwang->current_id = 0;
+				input_report_key(input_dev,
+						 hanwang->current_tool, 0);
+			}
+			break;
+
+		case 0xc2:	/* first time tool prox in */
+			switch (data[3] & 0xf0) {
+			case 0x20:	/* art_master III */
+			case 0x30:	/* art_master_HD */
+				hanwang->current_id = STYLUS_DEVICE_ID;
+				hanwang->current_tool = BTN_TOOL_PEN;
+				input_report_key(input_dev, BTN_TOOL_PEN, 1);
+				break;
+			case 0xa0:	/* art_master III */
+			case 0xb0:	/* art_master_HD */
+				hanwang->current_id = ERASER_DEVICE_ID;
+				hanwang->current_tool = BTN_TOOL_RUBBER;
+				input_report_key(input_dev, BTN_TOOL_RUBBER, 1);
+				break;
+			default:
+				hanwang->current_id = 0;
+				dev_dbg(&dev->dev,
+					"unknown tablet tool %02x\n", data[0]);
+				break;
+			}
+			break;
+
+		default:	/* tool data packet */
+			switch (type) {
+			case HANWANG_ART_MASTER_III:
+				p = (data[6] << 3) |
+				    ((data[7] & 0xc0) >> 5) |
+				    (data[1] & 0x01);
+				break;
+
+			case HANWANG_ART_MASTER_HD:
+			case HANWANG_ART_MASTER_II:
+				p = (data[7] >> 6) | (data[6] << 2);
+				break;
+
+			default:
+				p = 0;
+				break;
+			}
+
+			input_report_abs(input_dev, ABS_X,
+					 be16_to_cpup((__be16 *)&data[2]));
+			input_report_abs(input_dev, ABS_Y,
+					 be16_to_cpup((__be16 *)&data[4]));
+			input_report_abs(input_dev, ABS_PRESSURE, p);
+			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);
+
+			if (type != HANWANG_ART_MASTER_II)
+				input_report_key(input_dev, BTN_STYLUS2,
+						 data[1] & 0x04);
+			else
+				input_report_key(input_dev, BTN_TOOL_PEN, 1);
+
+			break;
+		}
+
+		input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
+		input_event(input_dev, EV_MSC, MSC_SERIAL,
+				hanwang->features->pid);
+		break;
+
+	case 0x0c:
+		/* roll wheel */
+		hanwang->current_id = PAD_DEVICE_ID;
+
+		switch (type) {
+		case HANWANG_ART_MASTER_III:
+			input_report_key(input_dev, BTN_TOOL_FINGER,
+					 data[1] || data[2] || data[3]);
+			input_report_abs(input_dev, ABS_WHEEL, data[1]);
+			input_report_key(input_dev, BTN_0, data[2]);
+			for (i = 0; i < 8; i++)
+				input_report_key(input_dev,
+					 BTN_1 + i, data[3] & (1 << i));
+			break;
+
+		case HANWANG_ART_MASTER_HD:
+			input_report_key(input_dev, BTN_TOOL_FINGER, data[1] ||
+					data[2] || data[3] || data[4] ||
+					data[5] || data[6]);
+			input_report_abs(input_dev, ABS_RX,
+					((data[1] & 0x1f) << 8) | data[2]);
+			input_report_abs(input_dev, ABS_RY,
+					((data[3] & 0x1f) << 8) | data[4]);
+			input_report_key(input_dev, BTN_0, data[5] & 0x01);
+			for (i = 0; i < 4; i++) {
+				input_report_key(input_dev,
+					 BTN_1 + i, data[5] & (1 << i));
+				input_report_key(input_dev,
+					 BTN_5 + i, data[6] & (1 << i));
+			}
+			break;
+
+		case HANWANG_ART_MASTER_II:
+			dev_dbg(&dev->dev, "error packet  %02x\n", data[0]);
+			return;
+		}
+
+		input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
+		input_event(input_dev, EV_MSC, MSC_SERIAL, 0xffffffff);
+		break;
+
+	default:
+		dev_dbg(&dev->dev, "error packet  %02x\n", data[0]);
+		break;
+	}
+
+	input_sync(input_dev);
+}
+
+static void hanwang_irq(struct urb *urb)
+{
+	struct hanwang *hanwang = urb->context;
+	struct usb_device *dev = hanwang->usbdev;
+	int retval;
+
+	switch (urb->status) {
+	case 0:
+		/* success */;
+		hanwang_parse_packet(hanwang);
+		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);
+		break;
+	}
+
+	retval = usb_submit_urb(urb, GFP_ATOMIC);
+	if (retval)
+		dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d",
+			__func__, retval);
+}
+
+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 bool get_features(struct usb_device *dev, struct hanwang *hanwang)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(features_array); i++) {
+		if (le16_to_cpu(dev->descriptor.idProduct) ==
+				features_array[i].pid) {
+			hanwang->features = &features_array[i];
+			return true;
+		}
+	}
+
+	return false;
+}
+
+
+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;
+	int i;
+
+	if (intf->cur_altsetting->desc.bNumEndpoints < 1)
+		return -ENODEV;
+
+	hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!hanwang || !input_dev) {
+		error = -ENOMEM;
+		goto fail1;
+	}
+
+	if (!get_features(dev, hanwang)) {
+		error = -ENXIO;
+		goto fail1;
+	}
+
+	hanwang->data = usb_alloc_coherent(dev, hanwang->features->pkg_len,
+					GFP_KERNEL, &hanwang->data_dma);
+	if (!hanwang->data) {
+		error = -ENOMEM;
+		goto fail1;
+	}
+
+	hanwang->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!hanwang->irq) {
+		error = -ENOMEM;
+		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));
+
+	strscpy(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);
+
+	for (i = 0; i < ARRAY_SIZE(hw_mscevents); ++i)
+		__set_bit(hw_mscevents[i], input_dev->mscbit);
+
+	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);
+
+	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);
+
+	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);
+	usb_set_intfdata(intf, NULL);
+}
+
+static const 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 struct usb_driver hanwang_driver = {
+	.name		= "hanwang",
+	.probe		= hanwang_probe,
+	.disconnect	= hanwang_disconnect,
+	.id_table	= hanwang_ids,
+};
+
+module_usb_driver(hanwang_driver);