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| author | Simon Glass <sjg@chromium.org> | 2015-11-29 13:17:53 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2016-01-12 10:19:09 -0700 |
| commit | bab17cf143c4888d03eb51f20aa6b86210448608 (patch) | |
| tree | 8056619271bf91f76b5e76bb24bfc782321f21f0 /drivers/pci/pci-uclass.c | |
| parent | a0eb835635abe0952529e3eb5207a24ac36fa000 (diff) | |
dm: pci: Add a function to read a PCI BAR
Add a driver-model function for reading the PCI BAR from a device.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/pci/pci-uclass.c')
| -rw-r--r-- | drivers/pci/pci-uclass.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index dea0cb6e06..7a886f2048 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", |