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path: root/drivers/macintosh/mac_hid.c
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Diffstat (limited to 'drivers/macintosh/mac_hid.c')
-rw-r--r--drivers/macintosh/mac_hid.c266
1 files changed, 196 insertions, 70 deletions
diff --git a/drivers/macintosh/mac_hid.c b/drivers/macintosh/mac_hid.c
index 7b4ef5bb556b..e943d2a29253 100644
--- a/drivers/macintosh/mac_hid.c
+++ b/drivers/macintosh/mac_hid.c
@@ -13,17 +13,197 @@
13#include <linux/sysctl.h> 13#include <linux/sysctl.h>
14#include <linux/input.h> 14#include <linux/input.h>
15#include <linux/module.h> 15#include <linux/module.h>
16#include <linux/kbd_kern.h>
17 16
17MODULE_LICENSE("GPL");
18 18
19static struct input_dev *emumousebtn;
20static int emumousebtn_input_register(void);
21static int mouse_emulate_buttons; 19static int mouse_emulate_buttons;
22static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */ 20static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */
23static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */ 21static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */
24static int mouse_last_keycode;
25 22
26#if defined(CONFIG_SYSCTL) 23static struct input_dev *mac_hid_emumouse_dev;
24
25static 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
61static void mac_hid_destroy_emumouse(void)
62{
63 input_unregister_device(mac_hid_emumouse_dev);
64 mac_hid_emumouse_dev = NULL;
65}
66
67static 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
89static 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
133static 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
140static 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
148MODULE_DEVICE_TABLE(input, mac_hid_emumouse_ids);
149
150static 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
158static 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
175static void mac_hid_stop_emulation(void)
176{
177 input_unregister_handler(&mac_hid_emumouse_handler);
178 mac_hid_destroy_emumouse();
179}
180
181static 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
27/* file(s) in /proc/sys/dev/mac_hid */ 207/* file(s) in /proc/sys/dev/mac_hid */
28static ctl_table mac_hid_files[] = { 208static ctl_table mac_hid_files[] = {
29 { 209 {
@@ -31,7 +211,7 @@ static ctl_table mac_hid_files[] = {
31 .data = &mouse_emulate_buttons, 211 .data = &mouse_emulate_buttons,
32 .maxlen = sizeof(int), 212 .maxlen = sizeof(int),
33 .mode = 0644, 213 .mode = 0644,
34 .proc_handler = proc_dointvec, 214 .proc_handler = mac_hid_toggle_emumouse,
35 }, 215 },
36 { 216 {
37 .procname = "mouse_button2_keycode", 217 .procname = "mouse_button2_keycode",
@@ -74,75 +254,21 @@ static ctl_table mac_hid_root_dir[] = {
74 254
75static struct ctl_table_header *mac_hid_sysctl_header; 255static struct ctl_table_header *mac_hid_sysctl_header;
76 256
77#endif /* endif CONFIG_SYSCTL */ 257static int __init mac_hid_init(void)
78
79int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
80{
81 switch (caller) {
82 case 1:
83 /* Called from keyboard.c */
84 if (mouse_emulate_buttons
85 && (keycode == mouse_button2_keycode
86 || keycode == mouse_button3_keycode)) {
87 if (mouse_emulate_buttons == 1) {
88 input_report_key(emumousebtn,
89 keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
90 down);
91 input_sync(emumousebtn);
92 return 1;
93 }
94 mouse_last_keycode = down ? keycode : 0;
95 }
96 break;
97 }
98 return 0;
99}
100
101static struct lock_class_key emumousebtn_event_class;
102static struct lock_class_key emumousebtn_mutex_class;
103
104static int emumousebtn_input_register(void)
105{ 258{
106 int ret; 259 mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
107 260 if (!mac_hid_sysctl_header)
108 emumousebtn = input_allocate_device();
109 if (!emumousebtn)
110 return -ENOMEM; 261 return -ENOMEM;
111 262
112 lockdep_set_class(&emumousebtn->event_lock, &emumousebtn_event_class); 263 return 0;
113 lockdep_set_class(&emumousebtn->mutex, &emumousebtn_mutex_class);
114
115 emumousebtn->name = "Macintosh mouse button emulation";
116 emumousebtn->id.bustype = BUS_ADB;
117 emumousebtn->id.vendor = 0x0001;
118 emumousebtn->id.product = 0x0001;
119 emumousebtn->id.version = 0x0100;
120
121 emumousebtn->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
122 emumousebtn->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
123 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
124 emumousebtn->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
125
126 ret = input_register_device(emumousebtn);
127 if (ret)
128 input_free_device(emumousebtn);
129
130 return ret;
131} 264}
265module_init(mac_hid_init);
132 266
133static int __init mac_hid_init(void) 267static void __exit mac_hid_exit(void)
134{ 268{
135 int err; 269 unregister_sysctl_table(mac_hid_sysctl_header);
136
137 err = emumousebtn_input_register();
138 if (err)
139 return err;
140
141#if defined(CONFIG_SYSCTL)
142 mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
143#endif /* CONFIG_SYSCTL */
144 270
145 return 0; 271 if (mouse_emulate_buttons)
272 mac_hid_stop_emulation();
146} 273}
147 274module_exit(mac_hid_exit);
148device_initcall(mac_hid_init);
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-10 13:44:15 -0500