aboutsummaryrefslogtreecommitdiff
path: root/drivers/macintosh/mac_hid.c
blob: f972ff377b6362483f1bd2c312cba5c780165f86 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
/*
 * drivers/macintosh/mac_hid.c
 *
 * HID support stuff for Macintosh computers.
 *
 * Copyright (C) 2000 Franz Sirl.
 *
 * This file will soon be removed in favor of an uinput userspace tool.
 */

#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/sysctl.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/kbd_kern.h>


static struct input_dev *emumousebtn;
static int emumousebtn_input_register(void);
static int mouse_emulate_buttons;
static int mouse_button2_keycode = KEY_RIGHTCTRL;	/* right control key */
static int mouse_button3_keycode = KEY_RIGHTALT;	/* right option key */
static int mouse_last_keycode;

#if defined(CONFIG_SYSCTL)
/* file(s) in /proc/sys/dev/mac_hid */
static ctl_table mac_hid_files[] = {
	{
		.ctl_name	= DEV_MAC_HID_MOUSE_BUTTON_EMULATION,
		.procname	= "mouse_button_emulation",
		.data		= &mouse_emulate_buttons,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE,
		.procname	= "mouse_button2_keycode",
		.data		= &mouse_button2_keycode,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE,
		.procname	= "mouse_button3_keycode",
		.data		= &mouse_button3_keycode,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{ .ctl_name = 0 }
};

/* dir in /proc/sys/dev */
static ctl_table mac_hid_dir[] = {
	{
		.ctl_name	= DEV_MAC_HID,
		.procname	= "mac_hid",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= mac_hid_files,
	},
	{ .ctl_name = 0 }
};

/* /proc/sys/dev itself, in case that is not there yet */
static ctl_table mac_hid_root_dir[] = {
	{
		.ctl_name	= CTL_DEV,
		.procname	= "dev",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= mac_hid_dir,
	},
	{ .ctl_name = 0 }
};

static struct ctl_table_header *mac_hid_sysctl_header;

#endif /* endif CONFIG_SYSCTL */

int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
{
	switch (caller) {
	case 1:
		/* Called from keyboard.c */
		if (mouse_emulate_buttons
		    && (keycode == mouse_button2_keycode
			|| keycode == mouse_button3_keycode)) {
			if (mouse_emulate_buttons == 1) {
				input_report_key(emumousebtn,
						 keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
						 down);
				input_sync(emumousebtn);
				return 1;
			}
			mouse_last_keycode = down ? keycode : 0;
		}
		break;
	}
	return 0;
}

static struct lock_class_key emumousebtn_event_class;
static struct lock_class_key emumousebtn_mutex_class;

static int emumousebtn_input_register(void)
{
	int ret;

	emumousebtn = input_allocate_device();
	if (!emumousebtn)
		return -ENOMEM;

	lockdep_set_class(emumousebtn->event_lock, &emumousebtn_event_class);
	lockdep_set_class(emumousebtn->mutex, &emumousebtn_mutex_class);

	emumousebtn->name = "Macintosh mouse button emulation";
	emumousebtn->id.bustype = BUS_ADB;
	emumousebtn->id.vendor = 0x0001;
	emumousebtn->id.product = 0x0001;
	emumousebtn->id.version = 0x0100;

	emumousebtn->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
	emumousebtn->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
	emumousebtn->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);

	ret = input_register_device(emumousebtn);
	if (ret)
		input_free_device(emumousebtn);

	return ret;
}

static int __init mac_hid_init(void)
{
	int err;

	err = emumousebtn_input_register();
	if (err)
		return err;

#if defined(CONFIG_SYSCTL)
	mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
#endif /* CONFIG_SYSCTL */

	return 0;
}

device_initcall(mac_hid_init);