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