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
  17
  18 static struct input_dev *emumousebtn;
  19 static int emumousebtn_input_register(void);
  20 static int mouse_emulate_buttons;
  21 static int mouse_button2_keycode = KEY_RIGHTCTRL;       /* right control key */
  22 static int mouse_button3_keycode = KEY_RIGHTALT;        /* right option key */
  23 static int mouse_last_keycode;
  24
  25 #if defined(CONFIG_SYSCTL)
  26 /* file(s) in /proc/sys/dev/mac_hid */
  27 ctl_table mac_hid_files[] = {
  28         {
  29                 .ctl_name       = DEV_MAC_HID_MOUSE_BUTTON_EMULATION,
  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                 .ctl_name       = DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE,
  38                 .procname       = "mouse_button2_keycode",
  39                 .data           = &mouse_button2_keycode,
  40                 .maxlen         = sizeof(int),
  41                 .mode           = 0644,
  42                 .proc_handler   = &proc_dointvec,
  43         },
  44         {
  45                 .ctl_name       = DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE,
  46                 .procname       = "mouse_button3_keycode",
  47                 .data           = &mouse_button3_keycode,
  48                 .maxlen         = sizeof(int),
  49                 .mode           = 0644,
  50                 .proc_handler   = &proc_dointvec,
  51         },
  52         { .ctl_name = 0 }
  53 };
  54
  55 /* dir in /proc/sys/dev */
  56 ctl_table mac_hid_dir[] = {
  57         {
  58                 .ctl_name       = DEV_MAC_HID,
  59                 .procname       = "mac_hid",
  60                 .maxlen         = 0,
  61                 .mode           = 0555,
  62                 .child          = mac_hid_files,
  63         },
  64         { .ctl_name = 0 }
  65 };
  66
  67 /* /proc/sys/dev itself, in case that is not there yet */
  68 ctl_table mac_hid_root_dir[] = {
  69         {
  70                 .ctl_name       = CTL_DEV,
  71                 .procname       = "dev",
  72                 .maxlen         = 0,
  73                 .mode           = 0555,
  74                 .child          = mac_hid_dir,
  75         },
  76         { .ctl_name = 0 }
  77 };
  78
  79 static struct ctl_table_header *mac_hid_sysctl_header;
  80
  81 #endif /* endif CONFIG_SYSCTL */
  82
  83 int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
  84 {
  85         switch (caller) {
  86         case 1:
  87                 /* Called from keyboard.c */
  88                 if (mouse_emulate_buttons
  89                     && (keycode == mouse_button2_keycode
  90                         || keycode == mouse_button3_keycode)) {
  91                         if (mouse_emulate_buttons == 1) {
  92                                 input_report_key(emumousebtn,
  93                                                  keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
  94                                                  down);
  95                                 input_sync(emumousebtn);
  96                                 return 1;
  97                         }
  98                         mouse_last_keycode = down ? keycode : 0;
  99                 }
 100                 break;
 101         }
 102         return 0;
 103 }
 104
 105 EXPORT_SYMBOL(mac_hid_mouse_emulate_buttons);
 106
 107 static int emumousebtn_input_register(void)
 108 {
 109         int ret;
 110
 111         emumousebtn = input_allocate_device();
 112         if (!emumousebtn)
 113                 return -ENOMEM;
 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(EV_KEY) | BIT(EV_REL);
 122         emumousebtn->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 123         emumousebtn->relbit[0] = BIT(REL_X) | BIT(REL_Y);
 124
 125         ret = input_register_device(emumousebtn);
 126         if (ret)
 127                 input_free_device(emumousebtn);
 128
 129         return ret;
 130 }
 131
 132 int __init mac_hid_init(void)
 133 {
 134         int err;
 135
 136         err = emumousebtn_input_register();
 137         if (err)
 138                 return err;
 139
 140 #if defined(CONFIG_SYSCTL)
 141         mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir, 1);
 142 #endif /* CONFIG_SYSCTL */
 143
 144         return 0;
 145 }
 146
 147 device_initcall(mac_hid_init);