linux/drivers/platform/x86/dell-wmi-aio.c
Lv Zheng 8b48463f89 ACPI: Clean up inclusions of ACPI header files
Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and
<acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h>
inclusions and remove some inclusions of those files that aren't
necessary.

First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>
should not be included directly from any files that are built for
CONFIG_ACPI unset, because that generally leads to build warnings about
undefined symbols in !CONFIG_ACPI builds.  For CONFIG_ACPI set,
<linux/acpi.h> includes those files and for CONFIG_ACPI unset it
provides stub ACPI symbols to be used in that case.

Second, there are ordering dependencies between those files that always
have to be met.  Namely, it is required that <acpi/acpi_bus.h> be included
prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the
latter depends on are always there.  And <acpi/acpi.h> which provides
basic ACPICA type declarations should always be included prior to any other
ACPI headers in CONFIG_ACPI builds.  That also is taken care of including
<linux/acpi.h> as appropriate.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff)
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-07 01:03:14 +01:00

215 lines
5.3 KiB
C

/*
* WMI hotkeys support for Dell All-In-One series
*
* 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
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/acpi.h>
#include <linux/string.h>
MODULE_DESCRIPTION("WMI hotkeys driver for Dell All-In-One series");
MODULE_LICENSE("GPL");
#define EVENT_GUID1 "284A0E6B-380E-472A-921F-E52786257FB4"
#define EVENT_GUID2 "02314822-307C-4F66-BF0E-48AEAEB26CC8"
struct dell_wmi_event {
u16 length;
/* 0x000: A hot key pressed or an event occurred
* 0x00F: A sequence of hot keys are pressed */
u16 type;
u16 event[];
};
static const char *dell_wmi_aio_guids[] = {
EVENT_GUID1,
EVENT_GUID2,
NULL
};
MODULE_ALIAS("wmi:"EVENT_GUID1);
MODULE_ALIAS("wmi:"EVENT_GUID2);
static const struct key_entry dell_wmi_aio_keymap[] = {
{ KE_KEY, 0xc0, { KEY_VOLUMEUP } },
{ KE_KEY, 0xc1, { KEY_VOLUMEDOWN } },
{ KE_KEY, 0xe030, { KEY_VOLUMEUP } },
{ KE_KEY, 0xe02e, { KEY_VOLUMEDOWN } },
{ KE_KEY, 0xe020, { KEY_MUTE } },
{ KE_KEY, 0xe027, { KEY_DISPLAYTOGGLE } },
{ KE_KEY, 0xe006, { KEY_BRIGHTNESSUP } },
{ KE_KEY, 0xe005, { KEY_BRIGHTNESSDOWN } },
{ KE_KEY, 0xe00b, { KEY_SWITCHVIDEOMODE } },
{ KE_END, 0 }
};
static struct input_dev *dell_wmi_aio_input_dev;
/*
* The new WMI event data format will follow the dell_wmi_event structure
* So, we will check if the buffer matches the format
*/
static bool dell_wmi_aio_event_check(u8 *buffer, int length)
{
struct dell_wmi_event *event = (struct dell_wmi_event *)buffer;
if (event == NULL || length < 6)
return false;
if ((event->type == 0 || event->type == 0xf) &&
event->length >= 2)
return true;
return false;
}
static void dell_wmi_aio_notify(u32 value, void *context)
{
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
struct dell_wmi_event *event;
acpi_status status;
status = wmi_get_event_data(value, &response);
if (status != AE_OK) {
pr_info("bad event status 0x%x\n", status);
return;
}
obj = (union acpi_object *)response.pointer;
if (obj) {
unsigned int scancode = 0;
switch (obj->type) {
case ACPI_TYPE_INTEGER:
/* Most All-In-One correctly return integer scancode */
scancode = obj->integer.value;
sparse_keymap_report_event(dell_wmi_aio_input_dev,
scancode, 1, true);
break;
case ACPI_TYPE_BUFFER:
if (dell_wmi_aio_event_check(obj->buffer.pointer,
obj->buffer.length)) {
event = (struct dell_wmi_event *)
obj->buffer.pointer;
scancode = event->event[0];
} else {
/* Broken machines return the scancode in a
buffer */
if (obj->buffer.pointer &&
obj->buffer.length > 0)
scancode = obj->buffer.pointer[0];
}
if (scancode)
sparse_keymap_report_event(
dell_wmi_aio_input_dev,
scancode, 1, true);
break;
}
}
kfree(obj);
}
static int __init dell_wmi_aio_input_setup(void)
{
int err;
dell_wmi_aio_input_dev = input_allocate_device();
if (!dell_wmi_aio_input_dev)
return -ENOMEM;
dell_wmi_aio_input_dev->name = "Dell AIO WMI hotkeys";
dell_wmi_aio_input_dev->phys = "wmi/input0";
dell_wmi_aio_input_dev->id.bustype = BUS_HOST;
err = sparse_keymap_setup(dell_wmi_aio_input_dev,
dell_wmi_aio_keymap, NULL);
if (err) {
pr_err("Unable to setup input device keymap\n");
goto err_free_dev;
}
err = input_register_device(dell_wmi_aio_input_dev);
if (err) {
pr_info("Unable to register input device\n");
goto err_free_keymap;
}
return 0;
err_free_keymap:
sparse_keymap_free(dell_wmi_aio_input_dev);
err_free_dev:
input_free_device(dell_wmi_aio_input_dev);
return err;
}
static const char *dell_wmi_aio_find(void)
{
int i;
for (i = 0; dell_wmi_aio_guids[i] != NULL; i++)
if (wmi_has_guid(dell_wmi_aio_guids[i]))
return dell_wmi_aio_guids[i];
return NULL;
}
static int __init dell_wmi_aio_init(void)
{
int err;
const char *guid;
guid = dell_wmi_aio_find();
if (!guid) {
pr_warn("No known WMI GUID found\n");
return -ENXIO;
}
err = dell_wmi_aio_input_setup();
if (err)
return err;
err = wmi_install_notify_handler(guid, dell_wmi_aio_notify, NULL);
if (err) {
pr_err("Unable to register notify handler - %d\n", err);
sparse_keymap_free(dell_wmi_aio_input_dev);
input_unregister_device(dell_wmi_aio_input_dev);
return err;
}
return 0;
}
static void __exit dell_wmi_aio_exit(void)
{
const char *guid;
guid = dell_wmi_aio_find();
wmi_remove_notify_handler(guid);
sparse_keymap_free(dell_wmi_aio_input_dev);
input_unregister_device(dell_wmi_aio_input_dev);
}
module_init(dell_wmi_aio_init);
module_exit(dell_wmi_aio_exit);