sysctl: Drop & in front of every proc_handler.
[linux-2.6.git] / drivers / macintosh / mac_hid.c
1 /*
2  * drivers/macintosh/mac_hid.c
3  *
4  * HID support stuff for Macintosh computers.
5  *
6  * Copyright (C) 2000 Franz Sirl.
7  *
8  * This file will soon be removed in favor of an uinput userspace tool.
9  */
10
11 #include <linux/init.h>
12 #include <linux/proc_fs.h>
13 #include <linux/sysctl.h>
14 #include <linux/input.h>
15 #include <linux/module.h>
16 #include <linux/kbd_kern.h>
17
18
19 static struct input_dev *emumousebtn;
20 static int emumousebtn_input_register(void);
21 static int mouse_emulate_buttons;
22 static int mouse_button2_keycode = KEY_RIGHTCTRL;       /* right control key */
23 static int mouse_button3_keycode = KEY_RIGHTALT;        /* right option key */
24 static int mouse_last_keycode;
25
26 #if defined(CONFIG_SYSCTL)
27 /* file(s) in /proc/sys/dev/mac_hid */
28 static ctl_table mac_hid_files[] = {
29         {
30                 .procname       = "mouse_button_emulation",
31                 .data           = &mouse_emulate_buttons,
32                 .maxlen         = sizeof(int),
33                 .mode           = 0644,
34                 .proc_handler   = proc_dointvec,
35         },
36         {
37                 .procname       = "mouse_button2_keycode",
38                 .data           = &mouse_button2_keycode,
39                 .maxlen         = sizeof(int),
40                 .mode           = 0644,
41                 .proc_handler   = proc_dointvec,
42         },
43         {
44                 .procname       = "mouse_button3_keycode",
45                 .data           = &mouse_button3_keycode,
46                 .maxlen         = sizeof(int),
47                 .mode           = 0644,
48                 .proc_handler   = proc_dointvec,
49         },
50         { }
51 };
52
53 /* dir in /proc/sys/dev */
54 static ctl_table mac_hid_dir[] = {
55         {
56                 .procname       = "mac_hid",
57                 .maxlen         = 0,
58                 .mode           = 0555,
59                 .child          = mac_hid_files,
60         },
61         { }
62 };
63
64 /* /proc/sys/dev itself, in case that is not there yet */
65 static ctl_table mac_hid_root_dir[] = {
66         {
67                 .procname       = "dev",
68                 .maxlen         = 0,
69                 .mode           = 0555,
70                 .child          = mac_hid_dir,
71         },
72         { }
73 };
74
75 static struct ctl_table_header *mac_hid_sysctl_header;
76
77 #endif /* endif CONFIG_SYSCTL */
78
79 int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
80 {
81         switch (caller) {
82         case 1:
83                 /* Called from keyboard.c */
84                 if (mouse_emulate_buttons
85                     && (keycode == mouse_button2_keycode
86                         || keycode == mouse_button3_keycode)) {
87                         if (mouse_emulate_buttons == 1) {
88                                 input_report_key(emumousebtn,
89                                                  keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
90                                                  down);
91                                 input_sync(emumousebtn);
92                                 return 1;
93                         }
94                         mouse_last_keycode = down ? keycode : 0;
95                 }
96                 break;
97         }
98         return 0;
99 }
100
101 static struct lock_class_key emumousebtn_event_class;
102 static struct lock_class_key emumousebtn_mutex_class;
103
104 static int emumousebtn_input_register(void)
105 {
106         int ret;
107
108         emumousebtn = input_allocate_device();
109         if (!emumousebtn)
110                 return -ENOMEM;
111
112         lockdep_set_class(&emumousebtn->event_lock, &emumousebtn_event_class);
113         lockdep_set_class(&emumousebtn->mutex, &emumousebtn_mutex_class);
114
115         emumousebtn->name = "Macintosh mouse button emulation";
116         emumousebtn->id.bustype = BUS_ADB;
117         emumousebtn->id.vendor = 0x0001;
118         emumousebtn->id.product = 0x0001;
119         emumousebtn->id.version = 0x0100;
120
121         emumousebtn->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
122         emumousebtn->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
123                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
124         emumousebtn->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
125
126         ret = input_register_device(emumousebtn);
127         if (ret)
128                 input_free_device(emumousebtn);
129
130         return ret;
131 }
132
133 static int __init mac_hid_init(void)
134 {
135         int err;
136
137         err = emumousebtn_input_register();
138         if (err)
139                 return err;
140
141 #if defined(CONFIG_SYSCTL)
142         mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
143 #endif /* CONFIG_SYSCTL */
144
145         return 0;
146 }
147
148 device_initcall(mac_hid_init);