On Tue, Nov 17, 2015 at 11:53 AM, Simon Glass sjg@chromium.org wrote:
Add a driver-model function for reading the PCI BAR from a device.
Signed-off-by: Simon Glass sjg@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;elsereturn 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.cn@gmail.com