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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Internal PCI functions, not exported outside drivers/pci
*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef __pci_internal_h
#define __pci_internal_h
/**
* dm_pciauto_prescan_setup_bridge() - Set up a bridge for scanning
*
* This gets a bridge ready so that its downstream devices can be scanned.
* It sets up the bus number and memory range registers. Once the scan is
* completed, dm_pciauto_postscan_setup_bridge() should be called.
*
* @dev: Bridge device to be scanned
* @sub_bus: Bus number of the 'other side' of the bridge
*/
void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus);
/**
* dm_pciauto_postscan_setup_bridge() - Finish set up of a bridge after scanning
*
* This should be called after a bus scan is complete. It adjusts the memory
* ranges to fit with the devices actually found on the other side (downstream)
* of the bridge.
*
* @dev: Bridge device that was scanned
* @sub_bus: Bus number of the 'other side' of the bridge
*/
void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus);
/**
* dm_pciauto_config_device() - Configure a PCI device ready for use
*
* If the device is a bridge, downstream devices will be probed.
*
* @dev: Device to configure
* Return: the maximum PCI bus number found by this device. If there are no
* bridges, this just returns the device's bus number. If the device is a
* bridge then it will return a larger number, depending on the devices on
* that bridge. On error, returns a -ve error number.
*/
int dm_pciauto_config_device(struct udevice *dev);
/**
* pci_get_bus() - Get a pointer to a bus, given its number
*
* This looks up a PCI bus based on its bus number. The bus is probed if
* necessary.
*
* @busnum: PCI bus number to look up
* @busp: Returns PCI bus on success
* Return: 0 on success, or -ve error
*/
int pci_get_bus(int busnum, struct udevice **busp);
#endif
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