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linux/include/acpi/acpi_drivers.h
Bjorn Helgaas 46ec8598fd ACPI: support acpi_device_ops .notify methods 
This patch adds support for ACPI device driver .notify() methods.  If
such a method is present, Linux/ACPI installs a handler for device
notifications (but not for system notifications such as Bus Check,
Device Check, etc).  When a device notification occurs, Linux/ACPI
passes it on to the driver's .notify() method.

In most cases, this removes the need for drivers to install their own
handlers for device-specific notifications.

For fixed hardware devices like some power and sleep buttons, there's
no notification value because there's no control method to execute a
Notify opcode.  When a fixed hardware device generates an event, we
handle it the same as a regular device notification, except we send
a ACPI_FIXED_HARDWARE_EVENT value.  This is outside the normal 0x0-0xff
range used by Notify opcodes.

Several drivers install their own handlers for system Bus Check and
Device Check notifications so they can support hot-plug.  This patch
doesn't affect that usage.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Reviewed-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-05 02:25:07 -04:00

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/*
* acpi_drivers.h ($Revision: 31 $)
*
* 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.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#ifndef __ACPI_DRIVERS_H__
#define __ACPI_DRIVERS_H__
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
#define ACPI_MAX_STRING 80
/*
* Please update drivers/acpi/debug.c and Documentation/acpi/debug.txt
* if you add to this list.
*/
#define ACPI_BUS_COMPONENT 0x00010000
#define ACPI_AC_COMPONENT 0x00020000
#define ACPI_BATTERY_COMPONENT 0x00040000
#define ACPI_BUTTON_COMPONENT 0x00080000
#define ACPI_SBS_COMPONENT 0x00100000
#define ACPI_FAN_COMPONENT 0x00200000
#define ACPI_PCI_COMPONENT 0x00400000
#define ACPI_POWER_COMPONENT 0x00800000
#define ACPI_CONTAINER_COMPONENT 0x01000000
#define ACPI_SYSTEM_COMPONENT 0x02000000
#define ACPI_THERMAL_COMPONENT 0x04000000
#define ACPI_MEMORY_DEVICE_COMPONENT 0x08000000
#define ACPI_VIDEO_COMPONENT 0x10000000
#define ACPI_PROCESSOR_COMPONENT 0x20000000
/*
* _HID definitions
* HIDs must conform to ACPI spec(6.1.4)
* Linux specific HIDs do not apply to this and begin with LNX:
*/
#define ACPI_POWER_HID "LNXPOWER"
#define ACPI_PROCESSOR_OBJECT_HID "ACPI_CPU"
#define ACPI_PROCESSOR_HID "ACPI0007"
#define ACPI_SYSTEM_HID "LNXSYSTM"
#define ACPI_THERMAL_HID "LNXTHERM"
#define ACPI_BUTTON_HID_POWERF "LNXPWRBN"
#define ACPI_BUTTON_HID_SLEEPF "LNXSLPBN"
#define ACPI_VIDEO_HID "LNXVIDEO"
#define ACPI_BAY_HID "LNXIOBAY"
#define ACPI_DOCK_HID "LNXDOCK"
/*
* For fixed hardware buttons, we fabricate acpi_devices with HID
* ACPI_BUTTON_HID_POWERF or ACPI_BUTTON_HID_SLEEPF. Fixed hardware
* signals only an event; it doesn't supply a notification value.
* To allow drivers to treat notifications from fixed hardware the
* same as those from real devices, we turn the events into this
* notification value.
*/
#define ACPI_FIXED_HARDWARE_EVENT 0x100
/* --------------------------------------------------------------------------
PCI
-------------------------------------------------------------------------- */
/* ACPI PCI Interrupt Link (pci_link.c) */
int acpi_irq_penalty_init(void);
int acpi_pci_link_allocate_irq(acpi_handle handle, int index, int *triggering,
int *polarity, char **name);
int acpi_pci_link_free_irq(acpi_handle handle);
/* ACPI PCI Interrupt Routing (pci_irq.c) */
int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus);
void acpi_pci_irq_del_prt(int segment, int bus);
/* ACPI PCI Device Binding (pci_bind.c) */
struct pci_bus;
acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id);
int acpi_pci_bind(struct acpi_device *device);
int acpi_pci_bind_root(struct acpi_device *device, struct acpi_pci_id *id,
struct pci_bus *bus);
/* Arch-defined function to add a bus to the system */
struct pci_bus *pci_acpi_scan_root(struct acpi_device *device, int domain,
int bus);
/* --------------------------------------------------------------------------
Processor
-------------------------------------------------------------------------- */
#define ACPI_PROCESSOR_LIMIT_NONE 0x00
#define ACPI_PROCESSOR_LIMIT_INCREMENT 0x01
#define ACPI_PROCESSOR_LIMIT_DECREMENT 0x02
int acpi_processor_set_thermal_limit(acpi_handle handle, int type);
/*--------------------------------------------------------------------------
Dock Station
-------------------------------------------------------------------------- */
struct acpi_dock_ops {
acpi_notify_handler handler;
acpi_notify_handler uevent;
};
#if defined(CONFIG_ACPI_DOCK) || defined(CONFIG_ACPI_DOCK_MODULE)
extern int is_dock_device(acpi_handle handle);
extern int register_dock_notifier(struct notifier_block *nb);
extern void unregister_dock_notifier(struct notifier_block *nb);
extern int register_hotplug_dock_device(acpi_handle handle,
struct acpi_dock_ops *ops,
void *context);
extern void unregister_hotplug_dock_device(acpi_handle handle);
#else
static inline int is_dock_device(acpi_handle handle)
{
return 0;
}
static inline int register_dock_notifier(struct notifier_block *nb)
{
return -ENODEV;
}
static inline void unregister_dock_notifier(struct notifier_block *nb)
{
}
static inline int register_hotplug_dock_device(acpi_handle handle,
struct acpi_dock_ops *ops,
void *context)
{
return -ENODEV;
}
static inline void unregister_hotplug_dock_device(acpi_handle handle)
{
}
#endif
#endif /*__ACPI_DRIVERS_H__*/
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