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153 lines · 3.5 KiB

1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * SEGA Dreamcast mouse driver
4 * Based on drivers/usb/usbmouse.c
5 *
6 * Copyright (c) Yaegashi Takeshi, 2001
7 * Copyright (c) Adrian McMenamin, 2008 - 2009
8 */
9
10#include <linux/kernel.h>
11#include <linux/slab.h>
12#include <linux/input.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/timer.h>
16#include <linux/maple.h>
17
18MODULE_AUTHOR("Adrian McMenamin <[email protected]>");
19MODULE_DESCRIPTION("SEGA Dreamcast mouse driver");
20MODULE_LICENSE("GPL");
21
22struct dc_mouse {
23 struct input_dev *dev;
24 struct maple_device *mdev;
25};
26
27static void dc_mouse_callback(struct mapleq *mq)
28{
29 int buttons, relx, rely, relz;
30 struct maple_device *mapledev = mq->dev;
31 struct dc_mouse *mse = maple_get_drvdata(mapledev);
32 struct input_dev *dev = mse->dev;
33 unsigned char *res = mq->recvbuf->buf;
34
35 buttons = ~res[8];
36 relx = *(unsigned short *)(res + 12) - 512;
37 rely = *(unsigned short *)(res + 14) - 512;
38 relz = *(unsigned short *)(res + 16) - 512;
39
40 input_report_key(dev, BTN_LEFT, buttons & 4);
41 input_report_key(dev, BTN_MIDDLE, buttons & 9);
42 input_report_key(dev, BTN_RIGHT, buttons & 2);
43 input_report_rel(dev, REL_X, relx);
44 input_report_rel(dev, REL_Y, rely);
45 input_report_rel(dev, REL_WHEEL, relz);
46 input_sync(dev);
47}
48
49static int dc_mouse_open(struct input_dev *dev)
50{
51 struct dc_mouse *mse = input_get_drvdata(dev);
52
53 maple_getcond_callback(mse->mdev, dc_mouse_callback, HZ/50,
54 MAPLE_FUNC_MOUSE);
55
56 return 0;
57}
58
59static void dc_mouse_close(struct input_dev *dev)
60{
61 struct dc_mouse *mse = input_get_drvdata(dev);
62
63 maple_getcond_callback(mse->mdev, dc_mouse_callback, 0,
64 MAPLE_FUNC_MOUSE);
65}
66
67/* allow the mouse to be used */
68static int probe_maple_mouse(struct device *dev)
69{
70 struct maple_device *mdev = to_maple_dev(dev);
71 struct maple_driver *mdrv = to_maple_driver(dev->driver);
72 int error;
73 struct input_dev *input_dev;
74 struct dc_mouse *mse;
75
76 mse = kzalloc_obj(*mse);
77 if (!mse) {
78 error = -ENOMEM;
79 goto fail;
80 }
81
82 input_dev = input_allocate_device();
83 if (!input_dev) {
84 error = -ENOMEM;
85 goto fail_nomem;
86 }
87
88 mse->dev = input_dev;
89 mse->mdev = mdev;
90
91 maple_set_drvdata(mdev, mse);
92
93 input_set_drvdata(input_dev, mse);
94 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
95 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
96 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
97 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
98 BIT_MASK(REL_WHEEL);
99 input_dev->open = dc_mouse_open;
100 input_dev->close = dc_mouse_close;
101 input_dev->name = mdev->product_name;
102 input_dev->id.bustype = BUS_HOST;
103 error = input_register_device(input_dev);
104 if (error)
105 goto fail_register;
106
107 mdev->driver = mdrv;
108
109 return error;
110
111fail_register:
112 input_free_device(input_dev);
113 maple_set_drvdata(mdev, NULL);
114fail_nomem:
115 kfree(mse);
116fail:
117 return error;
118}
119
120static int remove_maple_mouse(struct device *dev)
121{
122 struct maple_device *mdev = to_maple_dev(dev);
123 struct dc_mouse *mse = maple_get_drvdata(mdev);
124
125 mdev->callback = NULL;
126 input_unregister_device(mse->dev);
127 maple_set_drvdata(mdev, NULL);
128 kfree(mse);
129
130 return 0;
131}
132
133static struct maple_driver dc_mouse_driver = {
134 .function = MAPLE_FUNC_MOUSE,
135 .drv = {
136 .name = "Dreamcast_mouse",
137 .probe = probe_maple_mouse,
138 .remove = remove_maple_mouse,
139 },
140};
141
142static int __init dc_mouse_init(void)
143{
144 return maple_driver_register(&dc_mouse_driver);
145}
146
147static void __exit dc_mouse_exit(void)
148{
149 maple_driver_unregister(&dc_mouse_driver);
150}
151
152module_init(dc_mouse_init);
153module_exit(dc_mouse_exit);