summaryrefslogtreecommitdiff
path: root/drivers/pci/setup-res.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci/setup-res.c')
-rw-r--r--drivers/pci/setup-res.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 9e4d485..bad509e 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -263,3 +263,46 @@ void pdev_sort_resources(struct pci_dev *dev, struct resource_list *head)
}
}
}
+
+int pci_enable_resources(struct pci_dev *dev, int mask)
+{
+ u16 cmd, old_cmd;
+ int i;
+ struct resource *r;
+
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+ old_cmd = cmd;
+
+ for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+ if (!(mask & (1 << i)))
+ continue;
+
+ r = &dev->resource[i];
+
+ if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
+ continue;
+ if ((i == PCI_ROM_RESOURCE) &&
+ (!(r->flags & IORESOURCE_ROM_ENABLE)))
+ continue;
+
+ if (!r->parent) {
+ dev_err(&dev->dev, "device not available because of "
+ "BAR %d [%llx:%llx] collisions\n", i,
+ (unsigned long long) r->start,
+ (unsigned long long) r->end);
+ return -EINVAL;
+ }
+
+ if (r->flags & IORESOURCE_IO)
+ cmd |= PCI_COMMAND_IO;
+ if (r->flags & IORESOURCE_MEM)
+ cmd |= PCI_COMMAND_MEMORY;
+ }
+
+ if (cmd != old_cmd) {
+ dev_info(&dev->dev, "enabling device (%04x -> %04x)\n",
+ old_cmd, cmd);
+ pci_write_config_word(dev, PCI_COMMAND, cmd);
+ }
+ return 0;
+}