dm: pci: Add a function to read a PCI BAR

[u-boot] / drivers / pci / pci-uclass.c

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index dea0cb6e06b70416497e90cf80cbb237695659f2..7a886f204813a3ee4834787bcad94b94b32b3259 100644 (file)
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -1055,6 +1055,19 @@ int pci_get_regions(struct udevice *dev, struct pci_region **iop,
        return (*iop != NULL) + (*memp != NULL) + (*prefp != NULL);
 }
 
+u32 dm_pci_read_bar32(struct udevice *dev, int barnum)
+{
+       u32 addr;
+       int bar;
+
+       bar = PCI_BASE_ADDRESS_0 + barnum * 4;
+       dm_pci_read_config32(dev, bar, &addr);
+       if (addr & PCI_BASE_ADDRESS_SPACE_IO)
+               return addr & PCI_BASE_ADDRESS_IO_MASK;
+       else
+               return addr & PCI_BASE_ADDRESS_MEM_MASK;
+}
+
 UCLASS_DRIVER(pci) = {
        .id             = UCLASS_PCI,
        .name           = "pci",