LXR uboot/drivers/pci/pci

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * Internal PCI functions, not exported outside drivers/pci
   4 *
   5 * Copyright (c) 2015 Google, Inc
   6 * Written by Simon Glass <sjg@chromium.org>
   7 */
   8
   9#ifndef __pci_internal_h
  10#define __pci_internal_h
  11
  12/**
  13 * dm_pciauto_prescan_setup_bridge() - Set up a bridge for scanning
  14 *
  15 * This gets a bridge ready so that its downstream devices can be scanned.
  16 * It sets up the bus number and memory range registers. Once the scan is
  17 * completed, dm_pciauto_postscan_setup_bridge() should be called.
  18 *
  19 * @dev:        Bridge device to be scanned
  20 * @sub_bus:    Bus number of the 'other side' of the bridge
  21 */
  22void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus);
  23
  24/**
  25 * dm_pciauto_postscan_setup_bridge() - Finish set up of a bridge after scanning
  26 *
  27 * This should be called after a bus scan is complete. It adjusts the memory
  28 * ranges to fit with the devices actually found on the other side (downstream)
  29 * of the bridge.
  30 *
  31 * @dev:        Bridge device that was scanned
  32 * @sub_bus:    Bus number of the 'other side' of the bridge
  33 */
  34void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus);
  35
  36/**
  37 * dm_pciauto_config_device() - Configure a PCI device ready for use
  38 *
  39 * If the device is a bridge, downstream devices will be probed.
  40 *
  41 * @dev:        Device to configure
  42 * @return the maximum PCI bus number found by this device. If there are no
  43 * bridges, this just returns the device's bus number. If the device is a
  44 * bridge then it will return a larger number, depending on the devices on
  45 * that bridge. On error, returns a -ve error number.
  46 */
  47int dm_pciauto_config_device(struct udevice *dev);
  48
  49/**
  50 * pci_get_bus() - Get a pointer to a bus, given its number
  51 *
  52 * This looks up a PCI bus based on its bus number. The bus is probed if
  53 * necessary.
  54 *
  55 * @busnum:     PCI bus number to look up
  56 * @busp:       Returns PCI bus on success
  57 * @return 0 on success, or -ve error
  58 */
  59int pci_get_bus(int busnum, struct udevice **busp);
  60
  61#endif
  62