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/*
* pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $)
*
* 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.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/acpi.h>
#include <linux/pm_runtime.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#define _COMPONENT ACPI_PCI_COMPONENT
ACPI_MODULE_NAME("pci_bind");
static int acpi_pci_unbind(struct acpi_device *device)
{
struct pci_dev *dev;
dev = acpi_get_pci_dev(device->handle);
if (!dev)
goto out;
device_set_run_wake(&dev->dev, false);
pci_acpi_remove_pm_notifier(device);
if (!dev->subordinate)
goto out;
acpi_pci_irq_del_prt(dev->subordinate);
device->ops.bind = NULL;
device->ops.unbind = NULL;
out:
pci_dev_put(dev);
return 0;
}
static int acpi_pci_bind(struct acpi_device *device)
{
acpi_status status;
acpi_handle handle;
struct pci_bus *bus;
struct pci_dev *dev;
dev = acpi_get_pci_dev(device->handle);
if (!dev)
return 0;
pci_acpi_add_pm_notifier(device, dev);
if (device->wakeup.flags.run_wake)
device_set_run_wake(&dev->dev, true);
/*
* Install the 'bind' function to facilitate callbacks for
* children of the P2P bridge.
*/
if (dev->subordinate) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Device %04x:%02x:%02x.%d is a PCI bridge\n",
pci_domain_nr(dev->bus), dev->bus->number,
PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)));
device->ops.bind = acpi_pci_bind;
device->ops.unbind = acpi_pci_unbind;
}
/*
* Evaluate and parse _PRT, if exists. This code allows parsing of
* _PRT objects within the scope of non-bridge devices. Note that
* _PRTs within the scope of a PCI bridge assume the bridge's
* subordinate bus number.
*
* TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
*/
status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
if (ACPI_FAILURE(status))
goto out;
if (dev->subordinate)
bus = dev->subordinate;
else
bus = dev->bus;
acpi_pci_irq_add_prt(device->handle, bus);
out:
pci_dev_put(dev);
return 0;
}
int acpi_pci_bind_root(struct acpi_device *device)
{
device->ops.bind = acpi_pci_bind;
device->ops.unbind = acpi_pci_unbind;
return 0;
}
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