Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
1da177e4 | 17 | |
429722e1 DT |
18 | MODULE_LICENSE("GPL"); |
19 | ||
87275856 | 20 | static int mouse_emulate_buttons; |
1da177e4 LT |
21 | static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */ |
22 | static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */ | |
1da177e4 | 23 | |
99b089c3 DT |
24 | static struct input_dev *mac_hid_emumouse_dev; |
25 | ||
87abb6bb DT |
26 | static DEFINE_MUTEX(mac_hid_emumouse_mutex); |
27 | ||
99b089c3 DT |
28 | static int mac_hid_create_emumouse(void) |
29 | { | |
30 | static struct lock_class_key mac_hid_emumouse_dev_event_class; | |
31 | static struct lock_class_key mac_hid_emumouse_dev_mutex_class; | |
32 | int err; | |
33 | ||
34 | mac_hid_emumouse_dev = input_allocate_device(); | |
35 | if (!mac_hid_emumouse_dev) | |
36 | return -ENOMEM; | |
37 | ||
38 | lockdep_set_class(&mac_hid_emumouse_dev->event_lock, | |
39 | &mac_hid_emumouse_dev_event_class); | |
40 | lockdep_set_class(&mac_hid_emumouse_dev->mutex, | |
41 | &mac_hid_emumouse_dev_mutex_class); | |
42 | ||
43 | mac_hid_emumouse_dev->name = "Macintosh mouse button emulation"; | |
44 | mac_hid_emumouse_dev->id.bustype = BUS_ADB; | |
45 | mac_hid_emumouse_dev->id.vendor = 0x0001; | |
46 | mac_hid_emumouse_dev->id.product = 0x0001; | |
47 | mac_hid_emumouse_dev->id.version = 0x0100; | |
48 | ||
49 | mac_hid_emumouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); | |
50 | mac_hid_emumouse_dev->keybit[BIT_WORD(BTN_MOUSE)] = | |
51 | BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); | |
52 | mac_hid_emumouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); | |
53 | ||
54 | err = input_register_device(mac_hid_emumouse_dev); | |
55 | if (err) { | |
56 | input_free_device(mac_hid_emumouse_dev); | |
57 | mac_hid_emumouse_dev = NULL; | |
58 | return err; | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | static void mac_hid_destroy_emumouse(void) | |
65 | { | |
66 | input_unregister_device(mac_hid_emumouse_dev); | |
67 | mac_hid_emumouse_dev = NULL; | |
68 | } | |
69 | ||
70 | static bool mac_hid_emumouse_filter(struct input_handle *handle, | |
71 | unsigned int type, unsigned int code, | |
72 | int value) | |
73 | { | |
74 | unsigned int btn; | |
75 | ||
76 | if (type != EV_KEY) | |
77 | return false; | |
78 | ||
79 | if (code == mouse_button2_keycode) | |
80 | btn = BTN_MIDDLE; | |
81 | else if (code == mouse_button3_keycode) | |
82 | btn = BTN_RIGHT; | |
83 | else | |
84 | return false; | |
85 | ||
86 | input_report_key(mac_hid_emumouse_dev, btn, value); | |
87 | input_sync(mac_hid_emumouse_dev); | |
88 | ||
89 | return true; | |
90 | } | |
91 | ||
92 | static int mac_hid_emumouse_connect(struct input_handler *handler, | |
93 | struct input_dev *dev, | |
94 | const struct input_device_id *id) | |
95 | { | |
96 | struct input_handle *handle; | |
97 | int error; | |
98 | ||
99 | /* Don't bind to ourselves */ | |
100 | if (dev == mac_hid_emumouse_dev) | |
101 | return -ENODEV; | |
102 | ||
103 | handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); | |
104 | if (!handle) | |
105 | return -ENOMEM; | |
106 | ||
107 | handle->dev = dev; | |
108 | handle->handler = handler; | |
109 | handle->name = "mac-button-emul"; | |
110 | ||
111 | error = input_register_handle(handle); | |
112 | if (error) { | |
113 | printk(KERN_ERR | |
114 | "mac_hid: Failed to register button emulation handle, " | |
115 | "error %d\n", error); | |
116 | goto err_free; | |
117 | } | |
118 | ||
119 | error = input_open_device(handle); | |
120 | if (error) { | |
121 | printk(KERN_ERR | |
122 | "mac_hid: Failed to open input device, error %d\n", | |
123 | error); | |
124 | goto err_unregister; | |
125 | } | |
126 | ||
127 | return 0; | |
128 | ||
129 | err_unregister: | |
130 | input_unregister_handle(handle); | |
131 | err_free: | |
132 | kfree(handle); | |
133 | return error; | |
134 | } | |
135 | ||
136 | static void mac_hid_emumouse_disconnect(struct input_handle *handle) | |
137 | { | |
138 | input_close_device(handle); | |
139 | input_unregister_handle(handle); | |
140 | kfree(handle); | |
141 | } | |
142 | ||
143 | static const struct input_device_id mac_hid_emumouse_ids[] = { | |
144 | { | |
145 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT, | |
146 | .evbit = { BIT_MASK(EV_KEY) }, | |
147 | }, | |
148 | { }, | |
149 | }; | |
150 | ||
151 | MODULE_DEVICE_TABLE(input, mac_hid_emumouse_ids); | |
152 | ||
153 | static struct input_handler mac_hid_emumouse_handler = { | |
154 | .filter = mac_hid_emumouse_filter, | |
155 | .connect = mac_hid_emumouse_connect, | |
156 | .disconnect = mac_hid_emumouse_disconnect, | |
157 | .name = "mac-button-emul", | |
158 | .id_table = mac_hid_emumouse_ids, | |
159 | }; | |
160 | ||
161 | static int mac_hid_start_emulation(void) | |
162 | { | |
163 | int err; | |
164 | ||
165 | err = mac_hid_create_emumouse(); | |
166 | if (err) | |
167 | return err; | |
168 | ||
169 | err = input_register_handler(&mac_hid_emumouse_handler); | |
170 | if (err) { | |
171 | mac_hid_destroy_emumouse(); | |
172 | return err; | |
173 | } | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 | static void mac_hid_stop_emulation(void) | |
179 | { | |
180 | input_unregister_handler(&mac_hid_emumouse_handler); | |
181 | mac_hid_destroy_emumouse(); | |
182 | } | |
183 | ||
5eb969d0 | 184 | static int mac_hid_toggle_emumouse(struct ctl_table *table, int write, |
99b089c3 DT |
185 | void __user *buffer, size_t *lenp, |
186 | loff_t *ppos) | |
187 | { | |
188 | int *valp = table->data; | |
189 | int old_val = *valp; | |
190 | int rc; | |
191 | ||
87abb6bb DT |
192 | rc = mutex_lock_killable(&mac_hid_emumouse_mutex); |
193 | if (rc) | |
194 | return rc; | |
195 | ||
99b089c3 DT |
196 | rc = proc_dointvec(table, write, buffer, lenp, ppos); |
197 | ||
198 | if (rc == 0 && write && *valp != old_val) { | |
199 | if (*valp == 1) | |
200 | rc = mac_hid_start_emulation(); | |
201 | else if (*valp == 0) | |
202 | mac_hid_stop_emulation(); | |
203 | else | |
204 | rc = -EINVAL; | |
205 | } | |
206 | ||
207 | /* Restore the old value in case of error */ | |
208 | if (rc) | |
209 | *valp = old_val; | |
210 | ||
87abb6bb DT |
211 | mutex_unlock(&mac_hid_emumouse_mutex); |
212 | ||
99b089c3 DT |
213 | return rc; |
214 | } | |
215 | ||
1da177e4 | 216 | /* file(s) in /proc/sys/dev/mac_hid */ |
5eb969d0 | 217 | static struct ctl_table mac_hid_files[] = { |
1da177e4 | 218 | { |
1da177e4 LT |
219 | .procname = "mouse_button_emulation", |
220 | .data = &mouse_emulate_buttons, | |
221 | .maxlen = sizeof(int), | |
222 | .mode = 0644, | |
99b089c3 | 223 | .proc_handler = mac_hid_toggle_emumouse, |
1da177e4 LT |
224 | }, |
225 | { | |
1da177e4 LT |
226 | .procname = "mouse_button2_keycode", |
227 | .data = &mouse_button2_keycode, | |
228 | .maxlen = sizeof(int), | |
229 | .mode = 0644, | |
6d456111 | 230 | .proc_handler = proc_dointvec, |
1da177e4 LT |
231 | }, |
232 | { | |
1da177e4 LT |
233 | .procname = "mouse_button3_keycode", |
234 | .data = &mouse_button3_keycode, | |
235 | .maxlen = sizeof(int), | |
236 | .mode = 0644, | |
6d456111 | 237 | .proc_handler = proc_dointvec, |
1da177e4 | 238 | }, |
894d2491 | 239 | { } |
1da177e4 LT |
240 | }; |
241 | ||
242 | /* dir in /proc/sys/dev */ | |
5eb969d0 | 243 | static struct ctl_table mac_hid_dir[] = { |
1da177e4 | 244 | { |
1da177e4 LT |
245 | .procname = "mac_hid", |
246 | .maxlen = 0, | |
247 | .mode = 0555, | |
248 | .child = mac_hid_files, | |
249 | }, | |
894d2491 | 250 | { } |
1da177e4 LT |
251 | }; |
252 | ||
253 | /* /proc/sys/dev itself, in case that is not there yet */ | |
5eb969d0 | 254 | static struct ctl_table mac_hid_root_dir[] = { |
1da177e4 | 255 | { |
1da177e4 LT |
256 | .procname = "dev", |
257 | .maxlen = 0, | |
258 | .mode = 0555, | |
259 | .child = mac_hid_dir, | |
260 | }, | |
894d2491 | 261 | { } |
1da177e4 LT |
262 | }; |
263 | ||
264 | static struct ctl_table_header *mac_hid_sysctl_header; | |
265 | ||
f3e5d2bf | 266 | static int __init mac_hid_init(void) |
1da177e4 | 267 | { |
0b4d4147 | 268 | mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir); |
99b089c3 DT |
269 | if (!mac_hid_sysctl_header) |
270 | return -ENOMEM; | |
1da177e4 LT |
271 | |
272 | return 0; | |
273 | } | |
429722e1 | 274 | module_init(mac_hid_init); |
1da177e4 | 275 | |
429722e1 DT |
276 | static void __exit mac_hid_exit(void) |
277 | { | |
278 | unregister_sysctl_table(mac_hid_sysctl_header); | |
279 | ||
280 | if (mouse_emulate_buttons) | |
281 | mac_hid_stop_emulation(); | |
282 | } | |
283 | module_exit(mac_hid_exit); |