109c434b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds * drivers/macintosh/mac_hid.c
41da177e4SLinus Torvalds *
51da177e4SLinus Torvalds * HID support stuff for Macintosh computers.
61da177e4SLinus Torvalds *
71da177e4SLinus Torvalds * Copyright (C) 2000 Franz Sirl.
81da177e4SLinus Torvalds *
91da177e4SLinus Torvalds * This file will soon be removed in favor of an uinput userspace tool.
101da177e4SLinus Torvalds */
111da177e4SLinus Torvalds
121da177e4SLinus Torvalds #include <linux/init.h>
131da177e4SLinus Torvalds #include <linux/proc_fs.h>
141da177e4SLinus Torvalds #include <linux/sysctl.h>
151da177e4SLinus Torvalds #include <linux/input.h>
161da177e4SLinus Torvalds #include <linux/module.h>
175a0e3ad6STejun Heo #include <linux/slab.h>
181da177e4SLinus Torvalds
1950b5fed9SJeff Johnson MODULE_DESCRIPTION("Mouse button 2+3 emulation");
20429722e1SDmitry Torokhov MODULE_LICENSE("GPL");
21429722e1SDmitry Torokhov
2287275856SOlaf Hering static int mouse_emulate_buttons;
231da177e4SLinus Torvalds static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */
241da177e4SLinus Torvalds static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */
251da177e4SLinus Torvalds
2699b089c3SDmitry Torokhov static struct input_dev *mac_hid_emumouse_dev;
2799b089c3SDmitry Torokhov
2887abb6bbSDmitry Torokhov static DEFINE_MUTEX(mac_hid_emumouse_mutex);
2987abb6bbSDmitry Torokhov
mac_hid_create_emumouse(void)3099b089c3SDmitry Torokhov static int mac_hid_create_emumouse(void)
3199b089c3SDmitry Torokhov {
3299b089c3SDmitry Torokhov static struct lock_class_key mac_hid_emumouse_dev_event_class;
3399b089c3SDmitry Torokhov static struct lock_class_key mac_hid_emumouse_dev_mutex_class;
3499b089c3SDmitry Torokhov int err;
3599b089c3SDmitry Torokhov
3699b089c3SDmitry Torokhov mac_hid_emumouse_dev = input_allocate_device();
3799b089c3SDmitry Torokhov if (!mac_hid_emumouse_dev)
3899b089c3SDmitry Torokhov return -ENOMEM;
3999b089c3SDmitry Torokhov
4099b089c3SDmitry Torokhov lockdep_set_class(&mac_hid_emumouse_dev->event_lock,
4199b089c3SDmitry Torokhov &mac_hid_emumouse_dev_event_class);
4299b089c3SDmitry Torokhov lockdep_set_class(&mac_hid_emumouse_dev->mutex,
4399b089c3SDmitry Torokhov &mac_hid_emumouse_dev_mutex_class);
4499b089c3SDmitry Torokhov
4599b089c3SDmitry Torokhov mac_hid_emumouse_dev->name = "Macintosh mouse button emulation";
4699b089c3SDmitry Torokhov mac_hid_emumouse_dev->id.bustype = BUS_ADB;
4799b089c3SDmitry Torokhov mac_hid_emumouse_dev->id.vendor = 0x0001;
4899b089c3SDmitry Torokhov mac_hid_emumouse_dev->id.product = 0x0001;
4999b089c3SDmitry Torokhov mac_hid_emumouse_dev->id.version = 0x0100;
5099b089c3SDmitry Torokhov
5199b089c3SDmitry Torokhov mac_hid_emumouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
5299b089c3SDmitry Torokhov mac_hid_emumouse_dev->keybit[BIT_WORD(BTN_MOUSE)] =
5399b089c3SDmitry Torokhov BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
5499b089c3SDmitry Torokhov mac_hid_emumouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
5599b089c3SDmitry Torokhov
5699b089c3SDmitry Torokhov err = input_register_device(mac_hid_emumouse_dev);
5799b089c3SDmitry Torokhov if (err) {
5899b089c3SDmitry Torokhov input_free_device(mac_hid_emumouse_dev);
5999b089c3SDmitry Torokhov mac_hid_emumouse_dev = NULL;
6099b089c3SDmitry Torokhov return err;
6199b089c3SDmitry Torokhov }
6299b089c3SDmitry Torokhov
6399b089c3SDmitry Torokhov return 0;
6499b089c3SDmitry Torokhov }
6599b089c3SDmitry Torokhov
mac_hid_destroy_emumouse(void)6699b089c3SDmitry Torokhov static void mac_hid_destroy_emumouse(void)
6799b089c3SDmitry Torokhov {
6899b089c3SDmitry Torokhov input_unregister_device(mac_hid_emumouse_dev);
6999b089c3SDmitry Torokhov mac_hid_emumouse_dev = NULL;
7099b089c3SDmitry Torokhov }
7199b089c3SDmitry Torokhov
mac_hid_emumouse_filter(struct input_handle * handle,unsigned int type,unsigned int code,int value)7299b089c3SDmitry Torokhov static bool mac_hid_emumouse_filter(struct input_handle *handle,
7399b089c3SDmitry Torokhov unsigned int type, unsigned int code,
7499b089c3SDmitry Torokhov int value)
7599b089c3SDmitry Torokhov {
7699b089c3SDmitry Torokhov unsigned int btn;
7799b089c3SDmitry Torokhov
7899b089c3SDmitry Torokhov if (type != EV_KEY)
7999b089c3SDmitry Torokhov return false;
8099b089c3SDmitry Torokhov
8199b089c3SDmitry Torokhov if (code == mouse_button2_keycode)
8299b089c3SDmitry Torokhov btn = BTN_MIDDLE;
8399b089c3SDmitry Torokhov else if (code == mouse_button3_keycode)
8499b089c3SDmitry Torokhov btn = BTN_RIGHT;
8599b089c3SDmitry Torokhov else
8699b089c3SDmitry Torokhov return false;
8799b089c3SDmitry Torokhov
8899b089c3SDmitry Torokhov input_report_key(mac_hid_emumouse_dev, btn, value);
8999b089c3SDmitry Torokhov input_sync(mac_hid_emumouse_dev);
9099b089c3SDmitry Torokhov
9199b089c3SDmitry Torokhov return true;
9299b089c3SDmitry Torokhov }
9399b089c3SDmitry Torokhov
mac_hid_emumouse_connect(struct input_handler * handler,struct input_dev * dev,const struct input_device_id * id)9499b089c3SDmitry Torokhov static int mac_hid_emumouse_connect(struct input_handler *handler,
9599b089c3SDmitry Torokhov struct input_dev *dev,
9699b089c3SDmitry Torokhov const struct input_device_id *id)
9799b089c3SDmitry Torokhov {
9899b089c3SDmitry Torokhov struct input_handle *handle;
9999b089c3SDmitry Torokhov int error;
10099b089c3SDmitry Torokhov
10199b089c3SDmitry Torokhov /* Don't bind to ourselves */
10299b089c3SDmitry Torokhov if (dev == mac_hid_emumouse_dev)
10399b089c3SDmitry Torokhov return -ENODEV;
10499b089c3SDmitry Torokhov
10599b089c3SDmitry Torokhov handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
10699b089c3SDmitry Torokhov if (!handle)
10799b089c3SDmitry Torokhov return -ENOMEM;
10899b089c3SDmitry Torokhov
10999b089c3SDmitry Torokhov handle->dev = dev;
11099b089c3SDmitry Torokhov handle->handler = handler;
11199b089c3SDmitry Torokhov handle->name = "mac-button-emul";
11299b089c3SDmitry Torokhov
11399b089c3SDmitry Torokhov error = input_register_handle(handle);
11499b089c3SDmitry Torokhov if (error) {
11599b089c3SDmitry Torokhov printk(KERN_ERR
11699b089c3SDmitry Torokhov "mac_hid: Failed to register button emulation handle, "
11799b089c3SDmitry Torokhov "error %d\n", error);
11899b089c3SDmitry Torokhov goto err_free;
11999b089c3SDmitry Torokhov }
12099b089c3SDmitry Torokhov
12199b089c3SDmitry Torokhov error = input_open_device(handle);
12299b089c3SDmitry Torokhov if (error) {
12399b089c3SDmitry Torokhov printk(KERN_ERR
12499b089c3SDmitry Torokhov "mac_hid: Failed to open input device, error %d\n",
12599b089c3SDmitry Torokhov error);
12699b089c3SDmitry Torokhov goto err_unregister;
12799b089c3SDmitry Torokhov }
12899b089c3SDmitry Torokhov
12999b089c3SDmitry Torokhov return 0;
13099b089c3SDmitry Torokhov
13199b089c3SDmitry Torokhov err_unregister:
13299b089c3SDmitry Torokhov input_unregister_handle(handle);
13399b089c3SDmitry Torokhov err_free:
13499b089c3SDmitry Torokhov kfree(handle);
13599b089c3SDmitry Torokhov return error;
13699b089c3SDmitry Torokhov }
13799b089c3SDmitry Torokhov
mac_hid_emumouse_disconnect(struct input_handle * handle)13899b089c3SDmitry Torokhov static void mac_hid_emumouse_disconnect(struct input_handle *handle)
13999b089c3SDmitry Torokhov {
14099b089c3SDmitry Torokhov input_close_device(handle);
14199b089c3SDmitry Torokhov input_unregister_handle(handle);
14299b089c3SDmitry Torokhov kfree(handle);
14399b089c3SDmitry Torokhov }
14499b089c3SDmitry Torokhov
14599b089c3SDmitry Torokhov static const struct input_device_id mac_hid_emumouse_ids[] = {
14699b089c3SDmitry Torokhov {
14799b089c3SDmitry Torokhov .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
14899b089c3SDmitry Torokhov .evbit = { BIT_MASK(EV_KEY) },
14999b089c3SDmitry Torokhov },
15099b089c3SDmitry Torokhov { },
15199b089c3SDmitry Torokhov };
15299b089c3SDmitry Torokhov
15399b089c3SDmitry Torokhov MODULE_DEVICE_TABLE(input, mac_hid_emumouse_ids);
15499b089c3SDmitry Torokhov
15599b089c3SDmitry Torokhov static struct input_handler mac_hid_emumouse_handler = {
15699b089c3SDmitry Torokhov .filter = mac_hid_emumouse_filter,
15799b089c3SDmitry Torokhov .connect = mac_hid_emumouse_connect,
15899b089c3SDmitry Torokhov .disconnect = mac_hid_emumouse_disconnect,
15999b089c3SDmitry Torokhov .name = "mac-button-emul",
16099b089c3SDmitry Torokhov .id_table = mac_hid_emumouse_ids,
16199b089c3SDmitry Torokhov };
16299b089c3SDmitry Torokhov
mac_hid_start_emulation(void)16399b089c3SDmitry Torokhov static int mac_hid_start_emulation(void)
16499b089c3SDmitry Torokhov {
16599b089c3SDmitry Torokhov int err;
16699b089c3SDmitry Torokhov
16799b089c3SDmitry Torokhov err = mac_hid_create_emumouse();
16899b089c3SDmitry Torokhov if (err)
16999b089c3SDmitry Torokhov return err;
17099b089c3SDmitry Torokhov
17199b089c3SDmitry Torokhov err = input_register_handler(&mac_hid_emumouse_handler);
17299b089c3SDmitry Torokhov if (err) {
17399b089c3SDmitry Torokhov mac_hid_destroy_emumouse();
17499b089c3SDmitry Torokhov return err;
17599b089c3SDmitry Torokhov }
17699b089c3SDmitry Torokhov
17799b089c3SDmitry Torokhov return 0;
17899b089c3SDmitry Torokhov }
17999b089c3SDmitry Torokhov
mac_hid_stop_emulation(void)18099b089c3SDmitry Torokhov static void mac_hid_stop_emulation(void)
18199b089c3SDmitry Torokhov {
18299b089c3SDmitry Torokhov input_unregister_handler(&mac_hid_emumouse_handler);
18399b089c3SDmitry Torokhov mac_hid_destroy_emumouse();
18499b089c3SDmitry Torokhov }
18599b089c3SDmitry Torokhov
mac_hid_toggle_emumouse(const struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)186*78eb4ea2SJoel Granados static int mac_hid_toggle_emumouse(const struct ctl_table *table, int write,
18732927393SChristoph Hellwig void *buffer, size_t *lenp, loff_t *ppos)
18899b089c3SDmitry Torokhov {
18999b089c3SDmitry Torokhov int *valp = table->data;
19099b089c3SDmitry Torokhov int old_val = *valp;
19199b089c3SDmitry Torokhov int rc;
19299b089c3SDmitry Torokhov
19387abb6bbSDmitry Torokhov rc = mutex_lock_killable(&mac_hid_emumouse_mutex);
19487abb6bbSDmitry Torokhov if (rc)
19587abb6bbSDmitry Torokhov return rc;
19687abb6bbSDmitry Torokhov
19799b089c3SDmitry Torokhov rc = proc_dointvec(table, write, buffer, lenp, ppos);
19899b089c3SDmitry Torokhov
19999b089c3SDmitry Torokhov if (rc == 0 && write && *valp != old_val) {
20099b089c3SDmitry Torokhov if (*valp == 1)
20199b089c3SDmitry Torokhov rc = mac_hid_start_emulation();
20299b089c3SDmitry Torokhov else if (*valp == 0)
20399b089c3SDmitry Torokhov mac_hid_stop_emulation();
20499b089c3SDmitry Torokhov else
20599b089c3SDmitry Torokhov rc = -EINVAL;
20699b089c3SDmitry Torokhov }
20799b089c3SDmitry Torokhov
20899b089c3SDmitry Torokhov /* Restore the old value in case of error */
20999b089c3SDmitry Torokhov if (rc)
21099b089c3SDmitry Torokhov *valp = old_val;
21199b089c3SDmitry Torokhov
21287abb6bbSDmitry Torokhov mutex_unlock(&mac_hid_emumouse_mutex);
21387abb6bbSDmitry Torokhov
21499b089c3SDmitry Torokhov return rc;
21599b089c3SDmitry Torokhov }
21699b089c3SDmitry Torokhov
2171da177e4SLinus Torvalds /* file(s) in /proc/sys/dev/mac_hid */
2185eb969d0SJoe Perches static struct ctl_table mac_hid_files[] = {
2191da177e4SLinus Torvalds {
2201da177e4SLinus Torvalds .procname = "mouse_button_emulation",
2211da177e4SLinus Torvalds .data = &mouse_emulate_buttons,
2221da177e4SLinus Torvalds .maxlen = sizeof(int),
2231da177e4SLinus Torvalds .mode = 0644,
22499b089c3SDmitry Torokhov .proc_handler = mac_hid_toggle_emumouse,
2251da177e4SLinus Torvalds },
2261da177e4SLinus Torvalds {
2271da177e4SLinus Torvalds .procname = "mouse_button2_keycode",
2281da177e4SLinus Torvalds .data = &mouse_button2_keycode,
2291da177e4SLinus Torvalds .maxlen = sizeof(int),
2301da177e4SLinus Torvalds .mode = 0644,
2316d456111SEric W. Biederman .proc_handler = proc_dointvec,
2321da177e4SLinus Torvalds },
2331da177e4SLinus Torvalds {
2341da177e4SLinus Torvalds .procname = "mouse_button3_keycode",
2351da177e4SLinus Torvalds .data = &mouse_button3_keycode,
2361da177e4SLinus Torvalds .maxlen = sizeof(int),
2371da177e4SLinus Torvalds .mode = 0644,
2386d456111SEric W. Biederman .proc_handler = proc_dointvec,
2391da177e4SLinus Torvalds },
2401da177e4SLinus Torvalds };
2411da177e4SLinus Torvalds
2421da177e4SLinus Torvalds static struct ctl_table_header *mac_hid_sysctl_header;
2431da177e4SLinus Torvalds
mac_hid_init(void)244f3e5d2bfSAdrian Bunk static int __init mac_hid_init(void)
2451da177e4SLinus Torvalds {
246e99f5e74SLuis Chamberlain mac_hid_sysctl_header = register_sysctl("dev/mac_hid", mac_hid_files);
24799b089c3SDmitry Torokhov if (!mac_hid_sysctl_header)
24899b089c3SDmitry Torokhov return -ENOMEM;
2491da177e4SLinus Torvalds
2501da177e4SLinus Torvalds return 0;
2511da177e4SLinus Torvalds }
252429722e1SDmitry Torokhov module_init(mac_hid_init);
2531da177e4SLinus Torvalds
mac_hid_exit(void)254429722e1SDmitry Torokhov static void __exit mac_hid_exit(void)
255429722e1SDmitry Torokhov {
256429722e1SDmitry Torokhov unregister_sysctl_table(mac_hid_sysctl_header);
257429722e1SDmitry Torokhov
258429722e1SDmitry Torokhov if (mouse_emulate_buttons)
259429722e1SDmitry Torokhov mac_hid_stop_emulation();
260429722e1SDmitry Torokhov }
261429722e1SDmitry Torokhov module_exit(mac_hid_exit);
262