diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/pci-uclass.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index 7b488795be..e38e0b2594 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -927,6 +927,45 @@ int pci_find_first_device(struct udevice **devp) return skip_to_next_device(bus, devp); } +ulong pci_conv_32_to_size(ulong value, uint offset, enum pci_size_t size) +{ + switch (size) { + case PCI_SIZE_8: + return (value >> ((offset & 3) * 8)) & 0xff; + case PCI_SIZE_16: + return (value >> ((offset & 2) * 8)) & 0xffff; + default: + return value; + } +} + +ulong pci_conv_size_to_32(ulong old, ulong value, uint offset, + enum pci_size_t size) +{ + uint off_mask; + uint val_mask, shift; + ulong ldata, mask; + + switch (size) { + case PCI_SIZE_8: + off_mask = 3; + val_mask = 0xff; + break; + case PCI_SIZE_16: + off_mask = 2; + val_mask = 0xffff; + break; + default: + return value; + } + shift = (offset & off_mask) * 8; + ldata = (value & val_mask) << shift; + mask = val_mask << shift; + value = (old & ~mask) | ldata; + + return value; +} + UCLASS_DRIVER(pci) = { .id = UCLASS_PCI, .name = "pci", |