// SPDX-License-Identifier: GPL-2.0-only/* *	SEGA Dreamcast mouse driver *	Based on drivers/usb/usbmouse.c * *	Copyright (c) Yaegashi Takeshi, 2001 *	Copyright (c) Adrian McMenamin, 2008 - 2009 */ #include <linux/kernel.h>#include <linux/slab.h>#include <linux/input.h>#include <linux/module.h>#include <linux/init.h>#include <linux/timer.h>#include <linux/maple.h> MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");MODULE_DESCRIPTION("SEGA Dreamcast mouse driver");MODULE_LICENSE("GPL"); struct dc_mouse {	struct input_dev *dev;	struct maple_device *mdev;}; static void dc_mouse_callback(struct mapleq *mq){	int buttons, relx, rely, relz;	struct maple_device *mapledev = mq->dev;	struct dc_mouse *mse = maple_get_drvdata(mapledev);	struct input_dev *dev = mse->dev;	unsigned char *res = mq->recvbuf->buf; 	buttons = ~res[8];	relx = *(unsigned short *)(res + 12) - 512;	rely = *(unsigned short *)(res + 14) - 512;	relz = *(unsigned short *)(res + 16) - 512; 	input_report_key(dev, BTN_LEFT,   buttons & 4);	input_report_key(dev, BTN_MIDDLE, buttons & 9);	input_report_key(dev, BTN_RIGHT,  buttons & 2);	input_report_rel(dev, REL_X,      relx);	input_report_rel(dev, REL_Y,      rely);	input_report_rel(dev, REL_WHEEL,  relz);	input_sync(dev);} static int dc_mouse_open(struct input_dev *dev){	struct dc_mouse *mse = input_get_drvdata(dev); 	maple_getcond_callback(mse->mdev, dc_mouse_callback, HZ/50,		MAPLE_FUNC_MOUSE); 	return 0;} static void dc_mouse_close(struct input_dev *dev){	struct dc_mouse *mse = input_get_drvdata(dev); 	maple_getcond_callback(mse->mdev, dc_mouse_callback, 0,		MAPLE_FUNC_MOUSE);} /* allow the mouse to be used */static int probe_maple_mouse(struct device *dev){	struct maple_device *mdev = to_maple_dev(dev);	struct maple_driver *mdrv = to_maple_driver(dev->driver);	int error;	struct input_dev *input_dev;	struct dc_mouse *mse; 	mse = kzalloc_obj(*mse);	if (!mse) {		error = -ENOMEM;		goto fail;	} 	input_dev = input_allocate_device();	if (!input_dev) {		error = -ENOMEM;		goto fail_nomem;	} 	mse->dev = input_dev;	mse->mdev = mdev; 	maple_set_drvdata(mdev, mse); 	input_set_drvdata(input_dev, mse);	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);	input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);	input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |		BIT_MASK(REL_WHEEL);	input_dev->open = dc_mouse_open;	input_dev->close = dc_mouse_close;	input_dev->name = mdev->product_name;	input_dev->id.bustype = BUS_HOST;	error =	input_register_device(input_dev);	if (error)		goto fail_register; 	mdev->driver = mdrv; 	return error; fail_register:	input_free_device(input_dev);	maple_set_drvdata(mdev, NULL);fail_nomem:	kfree(mse);fail:	return error;} static int remove_maple_mouse(struct device *dev){	struct maple_device *mdev = to_maple_dev(dev);	struct dc_mouse *mse = maple_get_drvdata(mdev); 	mdev->callback = NULL;	input_unregister_device(mse->dev);	maple_set_drvdata(mdev, NULL);	kfree(mse); 	return 0;} static struct maple_driver dc_mouse_driver = {	.function =	MAPLE_FUNC_MOUSE,	.drv = {		.name = "Dreamcast_mouse",		.probe = probe_maple_mouse,		.remove = remove_maple_mouse,	},}; static int __init dc_mouse_init(void){	return maple_driver_register(&dc_mouse_driver);} static void __exit dc_mouse_exit(void){	maple_driver_unregister(&dc_mouse_driver);} module_init(dc_mouse_init);module_exit(dc_mouse_exit);