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185f812c41
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Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Internal PCI functions, not exported outside drivers/pci
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*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef __pci_internal_h
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#define __pci_internal_h
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/**
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* dm_pciauto_prescan_setup_bridge() - Set up a bridge for scanning
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*
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* This gets a bridge ready so that its downstream devices can be scanned.
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* It sets up the bus number and memory range registers. Once the scan is
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* completed, dm_pciauto_postscan_setup_bridge() should be called.
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*
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* @dev: Bridge device to be scanned
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* @sub_bus: Bus number of the 'other side' of the bridge
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*/
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void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus);
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/**
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* dm_pciauto_postscan_setup_bridge() - Finish set up of a bridge after scanning
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*
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* This should be called after a bus scan is complete. It adjusts the memory
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* ranges to fit with the devices actually found on the other side (downstream)
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* of the bridge.
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*
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* @dev: Bridge device that was scanned
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* @sub_bus: Bus number of the 'other side' of the bridge
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*/
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void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus);
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/**
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* dm_pciauto_config_device() - Configure a PCI device ready for use
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*
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* If the device is a bridge, downstream devices will be probed.
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*
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* @dev: Device to configure
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* Return: the maximum PCI bus number found by this device. If there are no
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* bridges, this just returns the device's bus number. If the device is a
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* bridge then it will return a larger number, depending on the devices on
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* that bridge. On error, returns a -ve error number.
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*/
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int dm_pciauto_config_device(struct udevice *dev);
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/**
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* pci_get_bus() - Get a pointer to a bus, given its number
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*
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* This looks up a PCI bus based on its bus number. The bus is probed if
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* necessary.
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*
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* @busnum: PCI bus number to look up
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* @busp: Returns PCI bus on success
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* Return: 0 on success, or -ve error
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*/
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int pci_get_bus(int busnum, struct udevice **busp);
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#endif
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