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[ACPI] Bind ACPI and PCI devices 

http://bugzilla.kernel.org/show_bug.cgi?id=4277

Signed-off-by: David Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
David Shaohua Li 2005-03-18 18:53:36 -05:00 committed by Len Brown
parent 4e10d12a3d
commit 84df749f36
1 changed files with 54 additions and 3 deletions
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57
drivers/pci/pci-acpi.c
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@ -1,9 +1,10 @@
/*
* File: pci-acpi.c
* Purpose: Provide PCI supports in ACPI
* Purpose: Provide PCI support in ACPI
*
* Copyright (C) 2004 Intel
* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
* Copyright (C) 2005 David Shaohua Li <shaohua.li@intel.com>
* Copyright (C) 2004 Tom Long Nguyen <tom.l.nguyen@intel.com>
* Copyright (C) 2004 Intel Corp.
*/
#include <linux/delay.h>
@ -207,3 +208,53 @@ acpi_status pci_osc_control_set(u32 flags)
return status;
}
EXPORT_SYMBOL(pci_osc_control_set);
/* ACPI bus type */
static int pci_acpi_find_device(struct device *dev, acpi_handle *handle)
{
struct pci_dev * pci_dev;
acpi_integer addr;
pci_dev = to_pci_dev(dev);
/* Please ref to ACPI spec for the syntax of _ADR */
addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn);
*handle = acpi_get_child(DEVICE_ACPI_HANDLE(dev->parent), addr);
if (!*handle)
return -ENODEV;
return 0;
}
static int pci_acpi_find_root_bridge(struct device *dev, acpi_handle *handle)
{
int num;
unsigned int seg, bus;
/*
* The string should be the same as root bridge's name
* Please look at 'pci_scan_bus_parented'
*/
num = sscanf(dev->bus_id, "pci%04x:%02x", &seg, &bus);
if (num != 2)
return -ENODEV;
*handle = acpi_get_pci_rootbridge_handle(seg, bus);
if (!*handle)
return -ENODEV;
return 0;
}
static struct acpi_bus_type pci_acpi_bus = {
.bus = &pci_bus_type,
.find_device = pci_acpi_find_device,
.find_bridge = pci_acpi_find_root_bridge,
};
static int __init pci_acpi_init(void)
{
int ret;
ret = register_acpi_bus_type(&pci_acpi_bus);
if (ret)
return 0;
return 0;
}
arch_initcall(pci_acpi_init);