From e8a552eb625f0b2d7a778d151af25a17c6d33b7b Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Fri, 14 Nov 2014 18:18:30 -0700 Subject: pci: Add functions to read and write a BAR address Some PCI functions cannot be auto-configured. Add a function to set up a fixed BAR which can be used in these situations. Also add a function to read the current address of a BAR. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- drivers/pci/pci.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 7ee21d1c1d..3daf73c30a 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -366,9 +366,27 @@ phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose, return phys_addr; } -/* - * - */ +void pci_write_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum, + u32 addr_and_ctrl) +{ + int bar; + + bar = PCI_BASE_ADDRESS_0 + barnum * 4; + pci_hose_write_config_dword(hose, dev, bar, addr_and_ctrl); +} + +u32 pci_read_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum) +{ + u32 addr; + int bar; + + bar = PCI_BASE_ADDRESS_0 + barnum * 4; + pci_hose_read_config_dword(hose, 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; +} int pci_hose_config_device(struct pci_controller *hose, pci_dev_t dev, -- cgit v1.2.1