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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>
160 lines
5.4 KiB
C
160 lines
5.4 KiB
C
/*
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* acpi_drivers.h ($Revision: 31 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#ifndef __ACPI_DRIVERS_H__
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#define __ACPI_DRIVERS_H__
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#include <linux/acpi.h>
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#include <acpi/acpi_bus.h>
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#define ACPI_MAX_STRING 80
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/*
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* Please update drivers/acpi/debug.c and Documentation/acpi/debug.txt
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* if you add to this list.
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*/
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#define ACPI_BUS_COMPONENT 0x00010000
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#define ACPI_AC_COMPONENT 0x00020000
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#define ACPI_BATTERY_COMPONENT 0x00040000
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#define ACPI_BUTTON_COMPONENT 0x00080000
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#define ACPI_SBS_COMPONENT 0x00100000
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#define ACPI_FAN_COMPONENT 0x00200000
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#define ACPI_PCI_COMPONENT 0x00400000
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#define ACPI_POWER_COMPONENT 0x00800000
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#define ACPI_CONTAINER_COMPONENT 0x01000000
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#define ACPI_SYSTEM_COMPONENT 0x02000000
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#define ACPI_THERMAL_COMPONENT 0x04000000
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#define ACPI_MEMORY_DEVICE_COMPONENT 0x08000000
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#define ACPI_VIDEO_COMPONENT 0x10000000
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#define ACPI_PROCESSOR_COMPONENT 0x20000000
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/*
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* _HID definitions
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* HIDs must conform to ACPI spec(6.1.4)
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* Linux specific HIDs do not apply to this and begin with LNX:
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*/
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#define ACPI_POWER_HID "LNXPOWER"
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#define ACPI_PROCESSOR_OBJECT_HID "ACPI_CPU"
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#define ACPI_PROCESSOR_HID "ACPI0007"
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#define ACPI_SYSTEM_HID "LNXSYSTM"
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#define ACPI_THERMAL_HID "LNXTHERM"
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#define ACPI_BUTTON_HID_POWERF "LNXPWRBN"
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#define ACPI_BUTTON_HID_SLEEPF "LNXSLPBN"
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#define ACPI_VIDEO_HID "LNXVIDEO"
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#define ACPI_BAY_HID "LNXIOBAY"
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#define ACPI_DOCK_HID "LNXDOCK"
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/*
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* For fixed hardware buttons, we fabricate acpi_devices with HID
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* ACPI_BUTTON_HID_POWERF or ACPI_BUTTON_HID_SLEEPF. Fixed hardware
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* signals only an event; it doesn't supply a notification value.
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* To allow drivers to treat notifications from fixed hardware the
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* same as those from real devices, we turn the events into this
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* notification value.
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*/
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#define ACPI_FIXED_HARDWARE_EVENT 0x100
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/* --------------------------------------------------------------------------
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PCI
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-------------------------------------------------------------------------- */
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/* ACPI PCI Interrupt Link (pci_link.c) */
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int acpi_irq_penalty_init(void);
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int acpi_pci_link_allocate_irq(acpi_handle handle, int index, int *triggering,
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int *polarity, char **name);
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int acpi_pci_link_free_irq(acpi_handle handle);
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/* ACPI PCI Interrupt Routing (pci_irq.c) */
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int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus);
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void acpi_pci_irq_del_prt(int segment, int bus);
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/* ACPI PCI Device Binding (pci_bind.c) */
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struct pci_bus;
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acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id);
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int acpi_pci_bind(struct acpi_device *device);
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int acpi_pci_bind_root(struct acpi_device *device, struct acpi_pci_id *id,
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struct pci_bus *bus);
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/* Arch-defined function to add a bus to the system */
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struct pci_bus *pci_acpi_scan_root(struct acpi_device *device, int domain,
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int bus);
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/* --------------------------------------------------------------------------
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Processor
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-------------------------------------------------------------------------- */
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#define ACPI_PROCESSOR_LIMIT_NONE 0x00
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#define ACPI_PROCESSOR_LIMIT_INCREMENT 0x01
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#define ACPI_PROCESSOR_LIMIT_DECREMENT 0x02
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int acpi_processor_set_thermal_limit(acpi_handle handle, int type);
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/*--------------------------------------------------------------------------
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Dock Station
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-------------------------------------------------------------------------- */
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struct acpi_dock_ops {
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acpi_notify_handler handler;
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acpi_notify_handler uevent;
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};
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#if defined(CONFIG_ACPI_DOCK) || defined(CONFIG_ACPI_DOCK_MODULE)
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extern int is_dock_device(acpi_handle handle);
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extern int register_dock_notifier(struct notifier_block *nb);
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extern void unregister_dock_notifier(struct notifier_block *nb);
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extern int register_hotplug_dock_device(acpi_handle handle,
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struct acpi_dock_ops *ops,
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void *context);
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extern void unregister_hotplug_dock_device(acpi_handle handle);
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#else
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static inline int is_dock_device(acpi_handle handle)
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{
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return 0;
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}
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static inline int register_dock_notifier(struct notifier_block *nb)
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{
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return -ENODEV;
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}
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static inline void unregister_dock_notifier(struct notifier_block *nb)
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{
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}
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static inline int register_hotplug_dock_device(acpi_handle handle,
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struct acpi_dock_ops *ops,
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void *context)
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{
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return -ENODEV;
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}
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static inline void unregister_hotplug_dock_device(acpi_handle handle)
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{
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}
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#endif
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#endif /*__ACPI_DRIVERS_H__*/
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