linux/drivers/macintosh/mac_hid.c
Eric W. Biederman 0b4d414714 [PATCH] sysctl: remove insert_at_head from register_sysctl
The semantic effect of insert_at_head is that it would allow new registered
sysctl entries to override existing sysctl entries of the same name.  Which is
pain for caching and the proc interface never implemented.

I have done an audit and discovered that none of the current users of
register_sysctl care as (excpet for directories) they do not register
duplicate sysctl entries.

So this patch simply removes the support for overriding existing entries in
the sys_sysctl interface since no one uses it or cares and it makes future
enhancments harder.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Corey Minyard <minyard@acm.org>
Cc: Neil Brown <neilb@suse.de>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Jan Kara <jack@ucw.cz>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Cc: David Chinner <dgc@sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:59 -08:00

147 lines
3.3 KiB
C

/*
* drivers/macintosh/mac_hid.c
*
* HID support stuff for Macintosh computers.
*
* Copyright (C) 2000 Franz Sirl.
*
* This file will soon be removed in favor of an uinput userspace tool.
*/
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/sysctl.h>
#include <linux/input.h>
#include <linux/module.h>
static struct input_dev *emumousebtn;
static int emumousebtn_input_register(void);
static int mouse_emulate_buttons;
static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */
static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */
static int mouse_last_keycode;
#if defined(CONFIG_SYSCTL)
/* file(s) in /proc/sys/dev/mac_hid */
ctl_table mac_hid_files[] = {
{
.ctl_name = DEV_MAC_HID_MOUSE_BUTTON_EMULATION,
.procname = "mouse_button_emulation",
.data = &mouse_emulate_buttons,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE,
.procname = "mouse_button2_keycode",
.data = &mouse_button2_keycode,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE,
.procname = "mouse_button3_keycode",
.data = &mouse_button3_keycode,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{ .ctl_name = 0 }
};
/* dir in /proc/sys/dev */
ctl_table mac_hid_dir[] = {
{
.ctl_name = DEV_MAC_HID,
.procname = "mac_hid",
.maxlen = 0,
.mode = 0555,
.child = mac_hid_files,
},
{ .ctl_name = 0 }
};
/* /proc/sys/dev itself, in case that is not there yet */
ctl_table mac_hid_root_dir[] = {
{
.ctl_name = CTL_DEV,
.procname = "dev",
.maxlen = 0,
.mode = 0555,
.child = mac_hid_dir,
},
{ .ctl_name = 0 }
};
static struct ctl_table_header *mac_hid_sysctl_header;
#endif /* endif CONFIG_SYSCTL */
int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
{
switch (caller) {
case 1:
/* Called from keyboard.c */
if (mouse_emulate_buttons
&& (keycode == mouse_button2_keycode
|| keycode == mouse_button3_keycode)) {
if (mouse_emulate_buttons == 1) {
input_report_key(emumousebtn,
keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
down);
input_sync(emumousebtn);
return 1;
}
mouse_last_keycode = down ? keycode : 0;
}
break;
}
return 0;
}
EXPORT_SYMBOL(mac_hid_mouse_emulate_buttons);
static int emumousebtn_input_register(void)
{
int ret;
emumousebtn = input_allocate_device();
if (!emumousebtn)
return -ENOMEM;
emumousebtn->name = "Macintosh mouse button emulation";
emumousebtn->id.bustype = BUS_ADB;
emumousebtn->id.vendor = 0x0001;
emumousebtn->id.product = 0x0001;
emumousebtn->id.version = 0x0100;
emumousebtn->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
emumousebtn->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
emumousebtn->relbit[0] = BIT(REL_X) | BIT(REL_Y);
ret = input_register_device(emumousebtn);
if (ret)
input_free_device(emumousebtn);
return ret;
}
int __init mac_hid_init(void)
{
int err;
err = emumousebtn_input_register();
if (err)
return err;
#if defined(CONFIG_SYSCTL)
mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
#endif /* CONFIG_SYSCTL */
return 0;
}
device_initcall(mac_hid_init);