diff options
| -rw-r--r-- | drivers/pci/pci-uclass.c | 13 | ||||
| -rw-r--r-- | include/pci.h | 9 |
2 files changed, 22 insertions, 0 deletions
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index dea0cb6..7a886f2 100644 --- 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", diff --git a/include/pci.h b/include/pci.h index 443af83..dcbe978 100644 --- a/include/pci.h +++ b/include/pci.h @@ -1167,6 +1167,15 @@ int pci_get_regions(struct udevice *dev, struct pci_region **iop, struct pci_region **memp, struct pci_region **prefp); /** + * dm_pci_read_bar32() - read a base address register from a device + * + * @dev: Device to check + * @barnum: Bar number to read (numbered from 0) + * @return: value of BAR + */ +u32 dm_pci_read_bar32(struct udevice *dev, int barnum); + +/** * dm_pci_find_device() - find a device by vendor/device ID * * @vendor: Vendor ID |