/* * 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 = maple_get_drvdata(to_maple_dev(&dev->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 = maple_get_drvdata(to_maple_dev(&dev->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(sizeof(struct dc_mouse), GFP_KERNEL); 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; 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; maple_set_drvdata(mdev, mse); return error; fail_register: input_free_device(input_dev); 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);