kernel_optimize_test/drivers/platform/x86/dell-wmi.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

365 lines
9.6 KiB
C

/*
* Dell WMI hotkeys
*
* Copyright (C) 2008 Red Hat <mjg@redhat.com>
*
* Portions based on wistron_btns.c:
* Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
* Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
* Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/input.h>
#include <acpi/acpi_drivers.h>
#include <linux/acpi.h>
#include <linux/string.h>
#include <linux/dmi.h>
MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
MODULE_LICENSE("GPL");
#define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
static int acpi_video;
MODULE_ALIAS("wmi:"DELL_EVENT_GUID);
struct key_entry {
char type; /* See KE_* below */
u16 code;
u16 keycode;
};
enum { KE_KEY, KE_SW, KE_IGNORE, KE_END };
/*
* Certain keys are flagged as KE_IGNORE. All of these are either
* notifications (rather than requests for change) or are also sent
* via the keyboard controller so should not be sent again.
*/
static struct key_entry dell_legacy_wmi_keymap[] = {
{KE_KEY, 0xe045, KEY_PROG1},
{KE_KEY, 0xe009, KEY_EJECTCD},
/* These also contain the brightness level at offset 6 */
{KE_KEY, 0xe006, KEY_BRIGHTNESSUP},
{KE_KEY, 0xe005, KEY_BRIGHTNESSDOWN},
/* Battery health status button */
{KE_KEY, 0xe007, KEY_BATTERY},
/* This is actually for all radios. Although physically a
* switch, the notification does not provide an indication of
* state and so it should be reported as a key */
{KE_KEY, 0xe008, KEY_WLAN},
/* The next device is at offset 6, the active devices are at
offset 8 and the attached devices at offset 10 */
{KE_KEY, 0xe00b, KEY_SWITCHVIDEOMODE},
{KE_IGNORE, 0xe00c, KEY_KBDILLUMTOGGLE},
/* BIOS error detected */
{KE_IGNORE, 0xe00d, KEY_RESERVED},
/* Wifi Catcher */
{KE_KEY, 0xe011, KEY_PROG2},
/* Ambient light sensor toggle */
{KE_IGNORE, 0xe013, KEY_RESERVED},
{KE_IGNORE, 0xe020, KEY_MUTE},
{KE_IGNORE, 0xe02e, KEY_VOLUMEDOWN},
{KE_IGNORE, 0xe030, KEY_VOLUMEUP},
{KE_IGNORE, 0xe033, KEY_KBDILLUMUP},
{KE_IGNORE, 0xe034, KEY_KBDILLUMDOWN},
{KE_IGNORE, 0xe03a, KEY_CAPSLOCK},
{KE_IGNORE, 0xe045, KEY_NUMLOCK},
{KE_IGNORE, 0xe046, KEY_SCROLLLOCK},
{KE_END, 0}
};
static bool dell_new_hk_type;
struct dell_new_keymap_entry {
u16 scancode;
u16 keycode;
};
struct dell_hotkey_table {
struct dmi_header header;
struct dell_new_keymap_entry keymap[];
};
static struct key_entry *dell_new_wmi_keymap;
static u16 bios_to_linux_keycode[256] = {
KEY_MEDIA, KEY_NEXTSONG, KEY_PLAYPAUSE, KEY_PREVIOUSSONG,
KEY_STOPCD, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_WWW, KEY_UNKNOWN, KEY_VOLUMEDOWN, KEY_MUTE,
KEY_VOLUMEUP, KEY_UNKNOWN, KEY_BATTERY, KEY_EJECTCD,
KEY_UNKNOWN, KEY_SLEEP, KEY_PROG1, KEY_BRIGHTNESSDOWN,
KEY_BRIGHTNESSUP, KEY_UNKNOWN, KEY_KBDILLUMTOGGLE,
KEY_UNKNOWN, KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN,
KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, KEY_PROG2,
KEY_UNKNOWN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
KEY_PROG3
};
static struct key_entry *dell_wmi_keymap = dell_legacy_wmi_keymap;
static struct input_dev *dell_wmi_input_dev;
static struct key_entry *dell_wmi_get_entry_by_scancode(unsigned int code)
{
struct key_entry *key;
for (key = dell_wmi_keymap; key->type != KE_END; key++)
if (code == key->code)
return key;
return NULL;
}
static struct key_entry *dell_wmi_get_entry_by_keycode(unsigned int keycode)
{
struct key_entry *key;
for (key = dell_wmi_keymap; key->type != KE_END; key++)
if (key->type == KE_KEY && keycode == key->keycode)
return key;
return NULL;
}
static int dell_wmi_getkeycode(struct input_dev *dev,
unsigned int scancode, unsigned int *keycode)
{
struct key_entry *key = dell_wmi_get_entry_by_scancode(scancode);
if (key && key->type == KE_KEY) {
*keycode = key->keycode;
return 0;
}
return -EINVAL;
}
static int dell_wmi_setkeycode(struct input_dev *dev,
unsigned int scancode, unsigned int keycode)
{
struct key_entry *key;
unsigned int old_keycode;
key = dell_wmi_get_entry_by_scancode(scancode);
if (key && key->type == KE_KEY) {
old_keycode = key->keycode;
key->keycode = keycode;
set_bit(keycode, dev->keybit);
if (!dell_wmi_get_entry_by_keycode(old_keycode))
clear_bit(old_keycode, dev->keybit);
return 0;
}
return -EINVAL;
}
static void dell_wmi_notify(u32 value, void *context)
{
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
static struct key_entry *key;
union acpi_object *obj;
acpi_status status;
status = wmi_get_event_data(value, &response);
if (status != AE_OK) {
printk(KERN_INFO "dell-wmi: bad event status 0x%x\n", status);
return;
}
obj = (union acpi_object *)response.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER) {
int reported_key;
u16 *buffer_entry = (u16 *)obj->buffer.pointer;
if (dell_new_hk_type && (buffer_entry[1] != 0x10)) {
printk(KERN_INFO "dell-wmi: Received unknown WMI event"
" (0x%x)\n", buffer_entry[1]);
return;
}
if (dell_new_hk_type)
reported_key = (int)buffer_entry[2];
else
reported_key = (int)buffer_entry[1] & 0xffff;
key = dell_wmi_get_entry_by_scancode(reported_key);
if (!key) {
printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n",
reported_key);
} else if ((key->keycode == KEY_BRIGHTNESSUP ||
key->keycode == KEY_BRIGHTNESSDOWN) && acpi_video) {
/* Don't report brightness notifications that will also
* come via ACPI */
return;
} else {
input_report_key(dell_wmi_input_dev, key->keycode, 1);
input_sync(dell_wmi_input_dev);
input_report_key(dell_wmi_input_dev, key->keycode, 0);
input_sync(dell_wmi_input_dev);
}
}
kfree(obj);
}
static void setup_new_hk_map(const struct dmi_header *dm)
{
int i;
int hotkey_num = (dm->length-4)/sizeof(struct dell_new_keymap_entry);
struct dell_hotkey_table *table =
container_of(dm, struct dell_hotkey_table, header);
dell_new_wmi_keymap = kzalloc((hotkey_num+1) *
sizeof(struct key_entry), GFP_KERNEL);
for (i = 0; i < hotkey_num; i++) {
dell_new_wmi_keymap[i].type = KE_KEY;
dell_new_wmi_keymap[i].code = table->keymap[i].scancode;
dell_new_wmi_keymap[i].keycode =
(table->keymap[i].keycode > 255) ? 0 :
bios_to_linux_keycode[table->keymap[i].keycode];
}
dell_new_wmi_keymap[i].type = KE_END;
dell_new_wmi_keymap[i].code = 0;
dell_new_wmi_keymap[i].keycode = 0;
dell_wmi_keymap = dell_new_wmi_keymap;
}
static void find_hk_type(const struct dmi_header *dm, void *dummy)
{
if ((dm->type == 0xb2) && (dm->length > 6)) {
dell_new_hk_type = true;
setup_new_hk_map(dm);
}
}
static int __init dell_wmi_input_setup(void)
{
struct key_entry *key;
int err;
dell_wmi_input_dev = input_allocate_device();
if (!dell_wmi_input_dev)
return -ENOMEM;
dell_wmi_input_dev->name = "Dell WMI hotkeys";
dell_wmi_input_dev->phys = "wmi/input0";
dell_wmi_input_dev->id.bustype = BUS_HOST;
dell_wmi_input_dev->getkeycode = dell_wmi_getkeycode;
dell_wmi_input_dev->setkeycode = dell_wmi_setkeycode;
for (key = dell_wmi_keymap; key->type != KE_END; key++) {
switch (key->type) {
case KE_KEY:
set_bit(EV_KEY, dell_wmi_input_dev->evbit);
set_bit(key->keycode, dell_wmi_input_dev->keybit);
break;
case KE_SW:
set_bit(EV_SW, dell_wmi_input_dev->evbit);
set_bit(key->keycode, dell_wmi_input_dev->swbit);
break;
}
}
err = input_register_device(dell_wmi_input_dev);
if (err) {
input_free_device(dell_wmi_input_dev);
return err;
}
return 0;
}
static int __init dell_wmi_init(void)
{
int err;
acpi_status status;
if (!wmi_has_guid(DELL_EVENT_GUID)) {
printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n");
return -ENODEV;
}
dmi_walk(find_hk_type, NULL);
acpi_video = acpi_video_backlight_support();
err = dell_wmi_input_setup();
if (err)
return err;
status = wmi_install_notify_handler(DELL_EVENT_GUID,
dell_wmi_notify, NULL);
if (ACPI_FAILURE(status)) {
input_unregister_device(dell_wmi_input_dev);
printk(KERN_ERR
"dell-wmi: Unable to register notify handler - %d\n",
status);
return -ENODEV;
}
return 0;
}
static void __exit dell_wmi_exit(void)
{
wmi_remove_notify_handler(DELL_EVENT_GUID);
input_unregister_device(dell_wmi_input_dev);
}
module_init(dell_wmi_init);
module_exit(dell_wmi_exit);