From: Christian Gmeiner christian.gmeiner@gmail.com
If U-Boot gets used as coreboot payload all pci resources got assigned by coreboot. If a dts without any pci ranges gets used the dm is not able to access pci device memory. To get things working make use of a 1:1 mapping for bus <-> phy addresses.
This change makes it possible to get the e1000 U-Boot driver working on a sandybridge device where U-Boot is used as coreboot payload.
Signed-off-by: Christian Gmeiner christian.gmeiner@gmail.com Reviewed-by: Bin Meng bmeng.cn@gmail.com [bmeng: fixed 'u-boot' in the commit message] Signed-off-by: Bin Meng bmeng.cn@gmail.com
---
drivers/pci/pci-uclass.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index de4c71b..46e9c71 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -1182,6 +1182,11 @@ static int _dm_pci_bus_to_phys(struct udevice *ctlr, struct pci_region *res; int i;
+ if (hose->region_count == 0) { + *pa = bus_addr; + return 0; + } + for (i = 0; i < hose->region_count; i++) { res = &hose->regions[i];
@@ -1245,6 +1250,11 @@ int _dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t phys_addr, ctlr = pci_get_controller(dev); hose = dev_get_uclass_priv(ctlr);
+ if (hose->region_count == 0) { + *ba = phys_addr; + return 0; + } + for (i = 0; i < hose->region_count; i++) { res = &hose->regions[i];