LXR uboot/include/dm/pci.h

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * Copyright (c) 2019 Google, Inc
   4 */
   5
   6#ifndef __DM_PCI_H
   7#define __DM_PCI_H
   8
   9struct udevice;
  10
  11/**
  12 * pci_get_devfn() - Extract the devfn from fdt_pci_addr of the device
  13 *
  14 * Get devfn from fdt_pci_addr of the specified device
  15 *
  16 * This returns an int to avoid a dependency on pci.h
  17 *
  18 * @dev:        PCI device
  19 * @return devfn in bits 15...8 if found (pci_dev_t format), or -ENODEV if not
  20 *      found
  21 */
  22int pci_get_devfn(struct udevice *dev);
  23
  24/**
  25 * pci_ofplat_get_devfn() - Get the PCI dev/fn from of-platdata
  26 *
  27 * This function is used to obtain a PCI device/function from of-platdata
  28 * register data. In this case the first cell of the 'reg' property contains
  29 * the required information.
  30 *
  31 * This returns an int to avoid a dependency on pci.h
  32 *
  33 * @reg: reg value from dt-platdata.c array (first member). This is not a
  34 *      pointer type, since the caller may use fdt32_t or fdt64_t depending on
  35 *      the address sizes.
  36 * @return device/function for that device (pci_dev_t format)
  37 */
  38static inline int pci_ofplat_get_devfn(u32 reg)
  39{
  40        return reg & 0xff00;
  41}
  42
  43#endif
  44