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