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