diff options
| author | Simon Glass <sjg@chromium.org> | 2015-11-19 20:27:01 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-12-01 06:26:36 -0700 |
| commit | f9260336d0eb3e41ced18f6408e90a32c8825f6c (patch) | |
| tree | 45647d035ef024080fc3b755ded4a46e96d7c651 | |
| parent | 9f60fb0db4b70c65760cb1799b76de1c9b71644d (diff) | |
| download | u-boot-f9260336d0eb3e41ced18f6408e90a32c8825f6c.tar.gz | |
dm: pci: Add a function to find the regions for a PCI bus
This function looks up the controller and returns a pointer to each region
type.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
| -rw-r--r-- | drivers/pci/pci-uclass.c | 30 | ||||
| -rw-r--r-- | include/pci.h | 12 |
2 files changed, 42 insertions, 0 deletions
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index f3f5f007c8..5fe30723c2 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -974,6 +974,36 @@ ulong pci_conv_size_to_32(ulong old, ulong value, uint offset, return value; } +int pci_get_regions(struct udevice *dev, struct pci_region **iop, + struct pci_region **memp, struct pci_region **prefp) +{ + struct udevice *bus = pci_get_controller(dev); + struct pci_controller *hose = dev_get_uclass_priv(bus); + int i; + + *iop = NULL; + *memp = NULL; + *prefp = NULL; + for (i = 0; i < hose->region_count; i++) { + switch (hose->regions[i].flags) { + case PCI_REGION_IO: + if (!*iop || (*iop)->size < hose->regions[i].size) + *iop = hose->regions + i; + break; + case PCI_REGION_MEM: + if (!*memp || (*memp)->size < hose->regions[i].size) + *memp = hose->regions + i; + break; + case (PCI_REGION_MEM | PCI_REGION_PREFETCH): + if (!*prefp || (*prefp)->size < hose->regions[i].size) + *prefp = hose->regions + i; + break; + } + } + + return (*iop != NULL) + (*memp != NULL) + (*prefp != NULL); +} + UCLASS_DRIVER(pci) = { .id = UCLASS_PCI, .name = "pci", diff --git a/include/pci.h b/include/pci.h index f3dda702f5..9c1948226f 100644 --- a/include/pci.h +++ b/include/pci.h @@ -1131,6 +1131,18 @@ ulong pci_conv_size_to_32(ulong old, ulong value, uint offset, struct udevice *pci_get_controller(struct udevice *dev); /** + * pci_get_regions() - obtain pointers to all the region types + * + * @dev: Device to check + * @iop: Returns a pointer to the I/O region, or NULL if none + * @memp: Returns a pointer to the memory region, or NULL if none + * @prefp: Returns a pointer to the pre-fetch region, or NULL if none + * @return the number of non-NULL regions returned, normally 3 + */ +int pci_get_regions(struct udevice *dev, struct pci_region **iop, + struct pci_region **memp, struct pci_region **prefp); + +/** * struct dm_pci_emul_ops - PCI device emulator operations */ struct dm_pci_emul_ops { |