// SPDX-License-Identifier: GPL-2.0-or-later/* *  Copyright (c) 2001-2005 Edouard TISSERANT   <edouard.tisserant@wanadoo.fr> *  Copyright (c) 2004-2005 Stephane VOLTZ      <svoltz@numericable.fr> * *  USB Acecad "Acecad Flair" tablet support * *  Changelog: *      v3.2 - Added sysfs support */ #include <linux/kernel.h>#include <linux/slab.h>#include <linux/module.h>#include <linux/usb/input.h> MODULE_AUTHOR("Edouard TISSERANT <edouard.tisserant@wanadoo.fr>");MODULE_DESCRIPTION("USB Acecad Flair tablet driver");MODULE_LICENSE("GPL"); #define USB_VENDOR_ID_ACECAD	0x0460#define USB_DEVICE_ID_FLAIR	0x0004#define USB_DEVICE_ID_302	0x0008 struct usb_acecad {	char name[128];	char phys[64];	struct usb_interface *intf;	struct input_dev *input;	struct urb *irq; 	unsigned char *data;	dma_addr_t data_dma;}; static void usb_acecad_irq(struct urb *urb){	struct usb_acecad *acecad = urb->context;	unsigned char *data = acecad->data;	struct input_dev *dev = acecad->input;	struct usb_interface *intf = acecad->intf;	struct usb_device *udev = interface_to_usbdev(intf);	int prox, status; 	switch (urb->status) {	case 0:		/* success */		break;	case -ECONNRESET:	case -ENOENT:	case -ESHUTDOWN:		/* this urb is terminated, clean up */		dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",			__func__, urb->status);		return;	default:		dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",			__func__, urb->status);		goto resubmit;	} 	prox = (data[0] & 0x04) >> 2;	input_report_key(dev, BTN_TOOL_PEN, prox); 	if (prox) {		int x = data[1] | (data[2] << 8);		int y = data[3] | (data[4] << 8);		/* Pressure should compute the same way for flair and 302 */		int pressure = data[5] | (data[6] << 8);		int touch = data[0] & 0x01;		int stylus = (data[0] & 0x10) >> 4;		int stylus2 = (data[0] & 0x20) >> 5;		input_report_abs(dev, ABS_X, x);		input_report_abs(dev, ABS_Y, y);		input_report_abs(dev, ABS_PRESSURE, pressure);		input_report_key(dev, BTN_TOUCH, touch);		input_report_key(dev, BTN_STYLUS, stylus);		input_report_key(dev, BTN_STYLUS2, stylus2);	} 	/* event termination */	input_sync(dev); resubmit:	status = usb_submit_urb(urb, GFP_ATOMIC);	if (status)		dev_err(&intf->dev,			"can't resubmit intr, %s-%s/input0, status %d\n",			udev->bus->bus_name,			udev->devpath, status);} static int usb_acecad_open(struct input_dev *dev){	struct usb_acecad *acecad = input_get_drvdata(dev); 	acecad->irq->dev = interface_to_usbdev(acecad->intf);	if (usb_submit_urb(acecad->irq, GFP_KERNEL))		return -EIO; 	return 0;} static void usb_acecad_close(struct input_dev *dev){	struct usb_acecad *acecad = input_get_drvdata(dev); 	usb_kill_urb(acecad->irq);} static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id){	struct usb_device *dev = interface_to_usbdev(intf);	struct usb_host_interface *interface = intf->cur_altsetting;	struct usb_endpoint_descriptor *endpoint;	struct usb_acecad *acecad;	struct input_dev *input_dev;	int pipe, maxp;	int err; 	if (interface->desc.bNumEndpoints != 1)		return -ENODEV; 	endpoint = &interface->endpoint[0].desc; 	if (!usb_endpoint_is_int_in(endpoint))		return -ENODEV; 	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);	maxp = usb_maxpacket(dev, pipe); 	acecad = kzalloc_obj(*acecad);	input_dev = input_allocate_device();	if (!acecad || !input_dev) {		err = -ENOMEM;		goto fail1;	} 	acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma);	if (!acecad->data) {		err= -ENOMEM;		goto fail1;	} 	acecad->irq = usb_alloc_urb(0, GFP_KERNEL);	if (!acecad->irq) {		err = -ENOMEM;		goto fail2;	} 	acecad->intf = intf;	acecad->input = input_dev; 	if (dev->manufacturer)		strscpy(acecad->name, dev->manufacturer, sizeof(acecad->name)); 	if (dev->product) {		if (dev->manufacturer)			strlcat(acecad->name, " ", sizeof(acecad->name));		strlcat(acecad->name, dev->product, sizeof(acecad->name));	} 	usb_make_path(dev, acecad->phys, sizeof(acecad->phys));	strlcat(acecad->phys, "/input0", sizeof(acecad->phys)); 	input_dev->name = acecad->name;	input_dev->phys = acecad->phys;	usb_to_input_id(dev, &input_dev->id);	input_dev->dev.parent = &intf->dev; 	input_set_drvdata(input_dev, acecad); 	input_dev->open = usb_acecad_open;	input_dev->close = usb_acecad_close; 	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);	input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |		BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) |		BIT_MASK(BTN_STYLUS2); 	switch (id->driver_info) {	case 0:		input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0);		input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0);		input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0);		if (!strlen(acecad->name))			snprintf(acecad->name, sizeof(acecad->name),				"USB Acecad Flair Tablet %04x:%04x",				le16_to_cpu(dev->descriptor.idVendor),				le16_to_cpu(dev->descriptor.idProduct));		break; 	case 1:		input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0);		input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0);		input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0);		if (!strlen(acecad->name))			snprintf(acecad->name, sizeof(acecad->name),				"USB Acecad 302 Tablet %04x:%04x",				le16_to_cpu(dev->descriptor.idVendor),				le16_to_cpu(dev->descriptor.idProduct));		break;	} 	usb_fill_int_urb(acecad->irq, dev, pipe,			acecad->data, maxp > 8 ? 8 : maxp,			usb_acecad_irq, acecad, endpoint->bInterval);	acecad->irq->transfer_dma = acecad->data_dma;	acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 	err = input_register_device(acecad->input);	if (err)		goto fail3; 	usb_set_intfdata(intf, acecad); 	return 0;  fail3:	usb_free_urb(acecad->irq); fail2:	usb_free_coherent(dev, 8, acecad->data, acecad->data_dma); fail1: input_free_device(input_dev);	kfree(acecad);	return err;} static void usb_acecad_disconnect(struct usb_interface *intf){	struct usb_acecad *acecad = usb_get_intfdata(intf);	struct usb_device *udev = interface_to_usbdev(intf); 	usb_set_intfdata(intf, NULL); 	input_unregister_device(acecad->input);	usb_free_urb(acecad->irq);	usb_free_coherent(udev, 8, acecad->data, acecad->data_dma);	kfree(acecad);} static const struct usb_device_id usb_acecad_id_table[] = {	{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },	{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),	 .driver_info = 1 },	{ }}; MODULE_DEVICE_TABLE(usb, usb_acecad_id_table); static struct usb_driver usb_acecad_driver = {	.name =		"usb_acecad",	.probe =	usb_acecad_probe,	.disconnect =	usb_acecad_disconnect,	.id_table =	usb_acecad_id_table,}; module_usb_driver(usb_acecad_driver);