diff options
Diffstat (limited to 'drivers/acpi/pci_bind.c')
| -rw-r--r-- | drivers/acpi/pci_bind.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c new file mode 100644 index 00000000..2ef04098 --- /dev/null +++ b/drivers/acpi/pci_bind.c @@ -0,0 +1,120 @@ +/* + * 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; +} |