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8fd76c4506
The mouse button emulation calls input device methods from an input device. This causes funny lock nesting which is harmless as each device has its own locks. Give the nesting device its own lock classes so that lockdep will not consider them the same. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
153 lines
3.6 KiB
C
153 lines
3.6 KiB
C
/*
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* drivers/macintosh/mac_hid.c
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*
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* HID support stuff for Macintosh computers.
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*
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* Copyright (C) 2000 Franz Sirl.
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*
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* This file will soon be removed in favor of an uinput userspace tool.
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*/
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/sysctl.h>
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#include <linux/input.h>
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#include <linux/module.h>
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#include <linux/kbd_kern.h>
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static struct input_dev *emumousebtn;
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static int emumousebtn_input_register(void);
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static int mouse_emulate_buttons;
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static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */
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static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */
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static int mouse_last_keycode;
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#if defined(CONFIG_SYSCTL)
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/* file(s) in /proc/sys/dev/mac_hid */
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static ctl_table mac_hid_files[] = {
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{
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.ctl_name = DEV_MAC_HID_MOUSE_BUTTON_EMULATION,
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.procname = "mouse_button_emulation",
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.data = &mouse_emulate_buttons,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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{
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.ctl_name = DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE,
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.procname = "mouse_button2_keycode",
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.data = &mouse_button2_keycode,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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{
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.ctl_name = DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE,
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.procname = "mouse_button3_keycode",
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.data = &mouse_button3_keycode,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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{ .ctl_name = 0 }
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};
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/* dir in /proc/sys/dev */
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static ctl_table mac_hid_dir[] = {
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{
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.ctl_name = DEV_MAC_HID,
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.procname = "mac_hid",
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.maxlen = 0,
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.mode = 0555,
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.child = mac_hid_files,
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},
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{ .ctl_name = 0 }
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};
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/* /proc/sys/dev itself, in case that is not there yet */
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static ctl_table mac_hid_root_dir[] = {
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{
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.ctl_name = CTL_DEV,
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.procname = "dev",
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.maxlen = 0,
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.mode = 0555,
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.child = mac_hid_dir,
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},
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{ .ctl_name = 0 }
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};
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static struct ctl_table_header *mac_hid_sysctl_header;
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#endif /* endif CONFIG_SYSCTL */
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int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
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{
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switch (caller) {
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case 1:
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/* Called from keyboard.c */
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if (mouse_emulate_buttons
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&& (keycode == mouse_button2_keycode
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|| keycode == mouse_button3_keycode)) {
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if (mouse_emulate_buttons == 1) {
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input_report_key(emumousebtn,
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keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
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down);
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input_sync(emumousebtn);
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return 1;
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}
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mouse_last_keycode = down ? keycode : 0;
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}
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break;
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}
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return 0;
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}
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static struct lock_class_key emumousebtn_event_class;
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static struct lock_class_key emumousebtn_mutex_class;
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static int emumousebtn_input_register(void)
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{
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int ret;
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emumousebtn = input_allocate_device();
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if (!emumousebtn)
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return -ENOMEM;
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lockdep_set_class(emumousebtn->event_lock, &emumousebtn_event_class);
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lockdep_set_class(emumousebtn->mutex, &emumousebtn_mutex_class);
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emumousebtn->name = "Macintosh mouse button emulation";
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emumousebtn->id.bustype = BUS_ADB;
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emumousebtn->id.vendor = 0x0001;
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emumousebtn->id.product = 0x0001;
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emumousebtn->id.version = 0x0100;
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emumousebtn->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
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emumousebtn->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
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BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
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emumousebtn->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
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ret = input_register_device(emumousebtn);
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if (ret)
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input_free_device(emumousebtn);
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return ret;
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}
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static int __init mac_hid_init(void)
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{
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int err;
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err = emumousebtn_input_register();
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if (err)
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return err;
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#if defined(CONFIG_SYSCTL)
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mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
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#endif /* CONFIG_SYSCTL */
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return 0;
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}
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device_initcall(mac_hid_init);
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