2 * drivers/macintosh/mac_hid.c
4 * HID support stuff for Macintosh computers.
6 * Copyright (C) 2000 Franz Sirl.
8 * This file will soon be removed in favor of an uinput userspace tool.
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>
17 MODULE_LICENSE("GPL");
19 static int mouse_emulate_buttons;
20 static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */
21 static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */
23 static struct input_dev *mac_hid_emumouse_dev;
25 static int mac_hid_create_emumouse(void)
27 static struct lock_class_key mac_hid_emumouse_dev_event_class;
28 static struct lock_class_key mac_hid_emumouse_dev_mutex_class;
31 mac_hid_emumouse_dev = input_allocate_device();
32 if (!mac_hid_emumouse_dev)
35 lockdep_set_class(&mac_hid_emumouse_dev->event_lock,
36 &mac_hid_emumouse_dev_event_class);
37 lockdep_set_class(&mac_hid_emumouse_dev->mutex,
38 &mac_hid_emumouse_dev_mutex_class);
40 mac_hid_emumouse_dev->name = "Macintosh mouse button emulation";
41 mac_hid_emumouse_dev->id.bustype = BUS_ADB;
42 mac_hid_emumouse_dev->id.vendor = 0x0001;
43 mac_hid_emumouse_dev->id.product = 0x0001;
44 mac_hid_emumouse_dev->id.version = 0x0100;
46 mac_hid_emumouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
47 mac_hid_emumouse_dev->keybit[BIT_WORD(BTN_MOUSE)] =
48 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
49 mac_hid_emumouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
51 err = input_register_device(mac_hid_emumouse_dev);
53 input_free_device(mac_hid_emumouse_dev);
54 mac_hid_emumouse_dev = NULL;
61 static void mac_hid_destroy_emumouse(void)
63 input_unregister_device(mac_hid_emumouse_dev);
64 mac_hid_emumouse_dev = NULL;
67 static bool mac_hid_emumouse_filter(struct input_handle *handle,
68 unsigned int type, unsigned int code,
76 if (code == mouse_button2_keycode)
78 else if (code == mouse_button3_keycode)
83 input_report_key(mac_hid_emumouse_dev, btn, value);
84 input_sync(mac_hid_emumouse_dev);
89 static int mac_hid_emumouse_connect(struct input_handler *handler,
90 struct input_dev *dev,
91 const struct input_device_id *id)
93 struct input_handle *handle;
96 /* Don't bind to ourselves */
97 if (dev == mac_hid_emumouse_dev)
100 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
105 handle->handler = handler;
106 handle->name = "mac-button-emul";
108 error = input_register_handle(handle);
111 "mac_hid: Failed to register button emulation handle, "
112 "error %d\n", error);
116 error = input_open_device(handle);
119 "mac_hid: Failed to open input device, error %d\n",
127 input_unregister_handle(handle);
133 static void mac_hid_emumouse_disconnect(struct input_handle *handle)
135 input_close_device(handle);
136 input_unregister_handle(handle);
140 static const struct input_device_id mac_hid_emumouse_ids[] = {
142 .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
143 .evbit = { BIT_MASK(EV_KEY) },
148 MODULE_DEVICE_TABLE(input, mac_hid_emumouse_ids);
150 static struct input_handler mac_hid_emumouse_handler = {
151 .filter = mac_hid_emumouse_filter,
152 .connect = mac_hid_emumouse_connect,
153 .disconnect = mac_hid_emumouse_disconnect,
154 .name = "mac-button-emul",
155 .id_table = mac_hid_emumouse_ids,
158 static int mac_hid_start_emulation(void)
162 err = mac_hid_create_emumouse();
166 err = input_register_handler(&mac_hid_emumouse_handler);
168 mac_hid_destroy_emumouse();
175 static void mac_hid_stop_emulation(void)
177 input_unregister_handler(&mac_hid_emumouse_handler);
178 mac_hid_destroy_emumouse();
181 static int mac_hid_toggle_emumouse(ctl_table *table, int write,
182 void __user *buffer, size_t *lenp,
185 int *valp = table->data;
189 rc = proc_dointvec(table, write, buffer, lenp, ppos);
191 if (rc == 0 && write && *valp != old_val) {
193 rc = mac_hid_start_emulation();
195 mac_hid_stop_emulation();
200 /* Restore the old value in case of error */
207 /* file(s) in /proc/sys/dev/mac_hid */
208 static ctl_table mac_hid_files[] = {
210 .procname = "mouse_button_emulation",
211 .data = &mouse_emulate_buttons,
212 .maxlen = sizeof(int),
214 .proc_handler = mac_hid_toggle_emumouse,
217 .procname = "mouse_button2_keycode",
218 .data = &mouse_button2_keycode,
219 .maxlen = sizeof(int),
221 .proc_handler = proc_dointvec,
224 .procname = "mouse_button3_keycode",
225 .data = &mouse_button3_keycode,
226 .maxlen = sizeof(int),
228 .proc_handler = proc_dointvec,
233 /* dir in /proc/sys/dev */
234 static ctl_table mac_hid_dir[] = {
236 .procname = "mac_hid",
239 .child = mac_hid_files,
244 /* /proc/sys/dev itself, in case that is not there yet */
245 static ctl_table mac_hid_root_dir[] = {
250 .child = mac_hid_dir,
255 static struct ctl_table_header *mac_hid_sysctl_header;
257 static int __init mac_hid_init(void)
259 mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
260 if (!mac_hid_sysctl_header)
265 module_init(mac_hid_init);
267 static void __exit mac_hid_exit(void)
269 unregister_sysctl_table(mac_hid_sysctl_header);
271 if (mouse_emulate_buttons)
272 mac_hid_stop_emulation();
274 module_exit(mac_hid_exit);