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   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);