macintosh/media bay: Convert semaphore to mutex
[linux-2.6] / 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                 .ctl_name       = DEV_MAC_HID_MOUSE_BUTTON_EMULATION,
31                 .procname       = "mouse_button_emulation",
32                 .data           = &mouse_emulate_buttons,
33                 .maxlen         = sizeof(int),
34                 .mode           = 0644,
35                 .proc_handler   = &proc_dointvec,
36         },
37         {
38                 .ctl_name       = DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE,
39                 .procname       = "mouse_button2_keycode",
40                 .data           = &mouse_button2_keycode,
41                 .maxlen         = sizeof(int),
42                 .mode           = 0644,
43                 .proc_handler   = &proc_dointvec,
44         },
45         {
46                 .ctl_name       = DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE,
47                 .procname       = "mouse_button3_keycode",
48                 .data           = &mouse_button3_keycode,
49                 .maxlen         = sizeof(int),
50                 .mode           = 0644,
51                 .proc_handler   = &proc_dointvec,
52         },
53         { .ctl_name = 0 }
54 };
55
56 /* dir in /proc/sys/dev */
57 static ctl_table mac_hid_dir[] = {
58         {
59                 .ctl_name       = DEV_MAC_HID,
60                 .procname       = "mac_hid",
61                 .maxlen         = 0,
62                 .mode           = 0555,
63                 .child          = mac_hid_files,
64         },
65         { .ctl_name = 0 }
66 };
67
68 /* /proc/sys/dev itself, in case that is not there yet */
69 static ctl_table mac_hid_root_dir[] = {
70         {
71                 .ctl_name       = CTL_DEV,
72                 .procname       = "dev",
73                 .maxlen         = 0,
74                 .mode           = 0555,
75                 .child          = mac_hid_dir,
76         },
77         { .ctl_name = 0 }
78 };
79
80 static struct ctl_table_header *mac_hid_sysctl_header;
81
82 #endif /* endif CONFIG_SYSCTL */
83
84 int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
85 {
86         switch (caller) {
87         case 1:
88                 /* Called from keyboard.c */
89                 if (mouse_emulate_buttons
90                     && (keycode == mouse_button2_keycode
91                         || keycode == mouse_button3_keycode)) {
92                         if (mouse_emulate_buttons == 1) {
93                                 input_report_key(emumousebtn,
94                                                  keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
95                                                  down);
96                                 input_sync(emumousebtn);
97                                 return 1;
98                         }
99                         mouse_last_keycode = down ? keycode : 0;
100                 }
101                 break;
102         }
103         return 0;
104 }
105
106 static struct lock_class_key emumousebtn_event_class;
107 static struct lock_class_key emumousebtn_mutex_class;
108
109 static int emumousebtn_input_register(void)
110 {
111         int ret;
112
113         emumousebtn = input_allocate_device();
114         if (!emumousebtn)
115                 return -ENOMEM;
116
117         lockdep_set_class(&emumousebtn->event_lock, &emumousebtn_event_class);
118         lockdep_set_class(&emumousebtn->mutex, &emumousebtn_mutex_class);
119
120         emumousebtn->name = "Macintosh mouse button emulation";
121         emumousebtn->id.bustype = BUS_ADB;
122         emumousebtn->id.vendor = 0x0001;
123         emumousebtn->id.product = 0x0001;
124         emumousebtn->id.version = 0x0100;
125
126         emumousebtn->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
127         emumousebtn->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
128                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
129         emumousebtn->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
130
131         ret = input_register_device(emumousebtn);
132         if (ret)
133                 input_free_device(emumousebtn);
134
135         return ret;
136 }
137
138 static int __init mac_hid_init(void)
139 {
140         int err;
141
142         err = emumousebtn_input_register();
143         if (err)
144                 return err;
145
146 #if defined(CONFIG_SYSCTL)
147         mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
148 #endif /* CONFIG_SYSCTL */
149
150         return 0;
151 }
152
153 device_initcall(mac_hid_init);