PCI: introduce pci_slot

[linux-2.6-omap-h63xx.git] / drivers / pci / probe.c

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 3706ce7972dddc0c389f828a3ec0c4635d1d8efe..4562827b7e22c360652e5d6f9bff397cce4a800d 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -414,6 +414,7 @@ static struct pci_bus * pci_alloc_bus(void)
                INIT_LIST_HEAD(&b->node);
                INIT_LIST_HEAD(&b->children);
                INIT_LIST_HEAD(&b->devices);
+               INIT_LIST_HEAD(&b->slots);
        }
        return b;
 }
@@ -857,6 +858,49 @@ int pci_cfg_space_size_ext(struct pci_dev *dev)
        return PCI_CFG_SPACE_SIZE;
 }
 
+/**
+ * pci_disable_pme - Disable the PME function of PCI device
+ * @dev: PCI device affected
+ * -EINVAL is returned if PCI device doesn't support PME.
+ * Zero is returned if the PME is supported and can be disabled.
+ */
+static int pci_disable_pme(struct pci_dev *dev)
+{
+       int pm;
+       u16 value;
+
+       /* find PCI PM capability in list */
+       pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+
+       /* If device doesn't support PM Capabilities, it means that PME is
+        * not supported.
+        */
+       if (!pm)
+               return -EINVAL;
+       /* Check device's ability to generate PME# */
+       pci_read_config_word(dev, pm + PCI_PM_PMC, &value);
+
+       value &= PCI_PM_CAP_PME_MASK;
+       /* Check if it can generate PME# */
+       if (!value) {
+               /*
+                * If it is zero, it means that PME is still unsupported
+                * although there exists the PM capability.
+                */
+               return -EINVAL;
+       }
+
+       pci_read_config_word(dev, pm + PCI_PM_CTRL, &value);
+
+       /* Clear PME_Status by writing 1 to it */
+       value |= PCI_PM_CTRL_PME_STATUS ;
+       /* Disable PME enable bit */
+       value &= ~PCI_PM_CTRL_PME_ENABLE;
+       pci_write_config_word(dev, pm + PCI_PM_CTRL, value);
+
+       return 0;
+}
+
 int pci_cfg_space_size(struct pci_dev *dev)
 {
        int pos;
@@ -964,6 +1008,7 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
        }
 
        pci_vpd_pci22_init(dev);
+       pci_disable_pme(dev);
 
        return dev;
 }