On Tue, Nov 17, 2015 at 11:53 AM, Simon Glass <s...@chromium.org> wrote: > Add a driver-model function for reading the PCI BAR from a device. > > Signed-off-by: Simon Glass <s...@chromium.org> > --- > > drivers/pci/pci-uclass.c | 13 +++++++++++++ > include/pci.h | 9 +++++++++ > 2 files changed, 22 insertions(+) > > diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c > index 929d772..4e37972 100644 > --- a/drivers/pci/pci-uclass.c > +++ b/drivers/pci/pci-uclass.c > @@ -1053,6 +1053,19 @@ 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 d4f6e02..f1c0d71 100644 > --- a/include/pci.h > +++ b/include/pci.h > @@ -1174,6 +1174,15 @@ int dm_pciauto_config_device(struct udevice *dev); > void dm_pciauto_region_init(struct pci_region *res); > > /** > + * 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 > --
Reviewed-by: Bin Meng <bmeng...@gmail.com> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot