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 | |
18 | MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>" ); |
19 | MODULE_DESCRIPTION("SEGA Dreamcast mouse driver" ); |
20 | MODULE_LICENSE("GPL" ); |
21 | |
22 | struct dc_mouse { |
23 | struct input_dev *dev; |
24 | struct maple_device *mdev; |
25 | }; |
26 | |
27 | static 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, value: buttons & 4); |
41 | input_report_key(dev, BTN_MIDDLE, value: buttons & 9); |
42 | input_report_key(dev, BTN_RIGHT, value: buttons & 2); |
43 | input_report_rel(dev, REL_X, value: relx); |
44 | input_report_rel(dev, REL_Y, value: rely); |
45 | input_report_rel(dev, REL_WHEEL, value: relz); |
46 | input_sync(dev); |
47 | } |
48 | |
49 | static int dc_mouse_open(struct input_dev *dev) |
50 | { |
51 | struct dc_mouse *mse = maple_get_drvdata(to_maple_dev(&dev->dev)); |
52 | |
53 | maple_getcond_callback(dev: mse->mdev, callback: dc_mouse_callback, HZ/50, |
54 | function: MAPLE_FUNC_MOUSE); |
55 | |
56 | return 0; |
57 | } |
58 | |
59 | static void dc_mouse_close(struct input_dev *dev) |
60 | { |
61 | struct dc_mouse *mse = maple_get_drvdata(to_maple_dev(&dev->dev)); |
62 | |
63 | maple_getcond_callback(dev: mse->mdev, callback: dc_mouse_callback, interval: 0, |
64 | function: MAPLE_FUNC_MOUSE); |
65 | } |
66 | |
67 | /* allow the mouse to be used */ |
68 | static 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(size: sizeof(struct dc_mouse), GFP_KERNEL); |
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 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); |
92 | input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | |
93 | BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); |
94 | input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) | |
95 | BIT_MASK(REL_WHEEL); |
96 | input_dev->open = dc_mouse_open; |
97 | input_dev->close = dc_mouse_close; |
98 | input_dev->name = mdev->product_name; |
99 | input_dev->id.bustype = BUS_HOST; |
100 | error = input_register_device(input_dev); |
101 | if (error) |
102 | goto fail_register; |
103 | |
104 | mdev->driver = mdrv; |
105 | maple_set_drvdata(mdev, mse); |
106 | |
107 | return error; |
108 | |
109 | fail_register: |
110 | input_free_device(dev: input_dev); |
111 | fail_nomem: |
112 | kfree(objp: mse); |
113 | fail: |
114 | return error; |
115 | } |
116 | |
117 | static int remove_maple_mouse(struct device *dev) |
118 | { |
119 | struct maple_device *mdev = to_maple_dev(dev); |
120 | struct dc_mouse *mse = maple_get_drvdata(mdev); |
121 | |
122 | mdev->callback = NULL; |
123 | input_unregister_device(mse->dev); |
124 | maple_set_drvdata(mdev, NULL); |
125 | kfree(objp: mse); |
126 | |
127 | return 0; |
128 | } |
129 | |
130 | static struct maple_driver dc_mouse_driver = { |
131 | .function = MAPLE_FUNC_MOUSE, |
132 | .drv = { |
133 | .name = "Dreamcast_mouse" , |
134 | .probe = probe_maple_mouse, |
135 | .remove = remove_maple_mouse, |
136 | }, |
137 | }; |
138 | |
139 | static int __init dc_mouse_init(void) |
140 | { |
141 | return maple_driver_register(&dc_mouse_driver); |
142 | } |
143 | |
144 | static void __exit dc_mouse_exit(void) |
145 | { |
146 | maple_driver_unregister(&dc_mouse_driver); |
147 | } |
148 | |
149 | module_init(dc_mouse_init); |
150 | module_exit(dc_mouse_exit); |
151 | |