// 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_obj(*hanwang);	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);