From f9260336d0eb3e41ced18f6408e90a32c8825f6c Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 19 Nov 2015 20:27:01 -0700 Subject: [PATCH] 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 Acked-by: Stephen Warren Tested-by: Stephen Warren --- drivers/pci/pci-uclass.c | 30 ++++++++++++++++++++++++++++++ include/pci.h | 12 ++++++++++++ 2 files changed, 42 insertions(+) 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 @@ -1130,6 +1130,18 @@ 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 */ -- 2.30.2