linux/drivers/platform/x86/tc1100-wmi.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

282 lines
6.5 KiB
C

/*
* HP Compaq TC1100 Tablet WMI Extras Driver
*
* Copyright (C) 2007 Carlos Corbacho <carlos@strangeworlds.co.uk>
* Copyright (C) 2004 Jamey Hicks <jamey.hicks@hp.com>
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* 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/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>
#define GUID "C364AC71-36DB-495A-8494-B439D472A505"
#define TC1100_INSTANCE_WIRELESS 1
#define TC1100_INSTANCE_JOGDIAL 2
MODULE_AUTHOR("Jamey Hicks, Carlos Corbacho");
MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras");
MODULE_LICENSE("GPL");
MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505");
static struct platform_device *tc1100_device;
struct tc1100_data {
u32 wireless;
u32 jogdial;
};
static struct tc1100_data suspend_data;
/* --------------------------------------------------------------------------
Device Management
-------------------------------------------------------------------------- */
static int get_state(u32 *out, u8 instance)
{
u32 tmp;
acpi_status status;
struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
if (!out)
return -EINVAL;
if (instance > 2)
return -ENODEV;
status = wmi_query_block(GUID, instance, &result);
if (ACPI_FAILURE(status))
return -ENODEV;
obj = (union acpi_object *) result.pointer;
if (obj && obj->type == ACPI_TYPE_INTEGER) {
tmp = obj->integer.value;
} else {
tmp = 0;
}
if (result.length > 0 && result.pointer)
kfree(result.pointer);
switch (instance) {
case TC1100_INSTANCE_WIRELESS:
*out = (tmp == 3) ? 1 : 0;
return 0;
case TC1100_INSTANCE_JOGDIAL:
*out = (tmp == 1) ? 0 : 1;
return 0;
default:
return -ENODEV;
}
}
static int set_state(u32 *in, u8 instance)
{
u32 value;
acpi_status status;
struct acpi_buffer input;
if (!in)
return -EINVAL;
if (instance > 2)
return -ENODEV;
switch (instance) {
case TC1100_INSTANCE_WIRELESS:
value = (*in) ? 1 : 2;
break;
case TC1100_INSTANCE_JOGDIAL:
value = (*in) ? 0 : 1;
break;
default:
return -ENODEV;
}
input.length = sizeof(u32);
input.pointer = &value;
status = wmi_set_block(GUID, instance, &input);
if (ACPI_FAILURE(status))
return -ENODEV;
return 0;
}
/* --------------------------------------------------------------------------
FS Interface (/sys)
-------------------------------------------------------------------------- */
/*
* Read/ write bool sysfs macro
*/
#define show_set_bool(value, instance) \
static ssize_t \
show_bool_##value(struct device *dev, struct device_attribute *attr, \
char *buf) \
{ \
u32 result; \
acpi_status status = get_state(&result, instance); \
if (ACPI_SUCCESS(status)) \
return sprintf(buf, "%d\n", result); \
return sprintf(buf, "Read error\n"); \
} \
\
static ssize_t \
set_bool_##value(struct device *dev, struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
u32 tmp = simple_strtoul(buf, NULL, 10); \
acpi_status status = set_state(&tmp, instance); \
if (ACPI_FAILURE(status)) \
return -EINVAL; \
return count; \
} \
static DEVICE_ATTR(value, S_IRUGO | S_IWUSR, \
show_bool_##value, set_bool_##value);
show_set_bool(wireless, TC1100_INSTANCE_WIRELESS);
show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL);
static struct attribute *tc1100_attributes[] = {
&dev_attr_wireless.attr,
&dev_attr_jogdial.attr,
NULL
};
static struct attribute_group tc1100_attribute_group = {
.attrs = tc1100_attributes,
};
/* --------------------------------------------------------------------------
Driver Model
-------------------------------------------------------------------------- */
static int __init tc1100_probe(struct platform_device *device)
{
return sysfs_create_group(&device->dev.kobj, &tc1100_attribute_group);
}
static int tc1100_remove(struct platform_device *device)
{
sysfs_remove_group(&device->dev.kobj, &tc1100_attribute_group);
return 0;
}
#ifdef CONFIG_PM
static int tc1100_suspend(struct device *dev)
{
int ret;
ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
if (ret)
return ret;
ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
if (ret)
return ret;
return 0;
}
static int tc1100_resume(struct device *dev)
{
int ret;
ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
if (ret)
return ret;
ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
if (ret)
return ret;
return 0;
}
static const struct dev_pm_ops tc1100_pm_ops = {
.suspend = tc1100_suspend,
.resume = tc1100_resume,
.freeze = tc1100_suspend,
.restore = tc1100_resume,
};
#endif
static struct platform_driver tc1100_driver = {
.driver = {
.name = "tc1100-wmi",
.owner = THIS_MODULE,
#ifdef CONFIG_PM
.pm = &tc1100_pm_ops,
#endif
},
.remove = tc1100_remove,
};
static int __init tc1100_init(void)
{
int error;
if (!wmi_has_guid(GUID))
return -ENODEV;
tc1100_device = platform_device_alloc("tc1100-wmi", -1);
if (!tc1100_device)
return -ENOMEM;
error = platform_device_add(tc1100_device);
if (error)
goto err_device_put;
error = platform_driver_probe(&tc1100_driver, tc1100_probe);
if (error)
goto err_device_del;
pr_info("HP Compaq TC1100 Tablet WMI Extras loaded\n");
return 0;
err_device_del:
platform_device_del(tc1100_device);
err_device_put:
platform_device_put(tc1100_device);
return error;
}
static void __exit tc1100_exit(void)
{
platform_device_unregister(tc1100_device);
platform_driver_unregister(&tc1100_driver);
}
module_init(tc1100_init);
module_exit(tc1100_exit);