1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Internal PCI functions, not exported outside drivers/pci 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright (c) 2015 Google, Inc 5*4882a593Smuzhiyun * Written by Simon Glass <sjg@chromium.org> 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #ifndef __pci_internal_h 11*4882a593Smuzhiyun #define __pci_internal_h 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun /** 14*4882a593Smuzhiyun * dm_pciauto_prescan_setup_bridge() - Set up a bridge for scanning 15*4882a593Smuzhiyun * 16*4882a593Smuzhiyun * This gets a bridge ready so that its downstream devices can be scanned. 17*4882a593Smuzhiyun * It sets up the bus number and memory range registers. Once the scan is 18*4882a593Smuzhiyun * completed, dm_pciauto_postscan_setup_bridge() should be called. 19*4882a593Smuzhiyun * 20*4882a593Smuzhiyun * @dev: Bridge device to be scanned 21*4882a593Smuzhiyun * @sub_bus: Bus number of the 'other side' of the bridge 22*4882a593Smuzhiyun */ 23*4882a593Smuzhiyun void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus); 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun /** 26*4882a593Smuzhiyun * dm_pciauto_postscan_setup_bridge() - Finish set up of a bridge after scanning 27*4882a593Smuzhiyun * 28*4882a593Smuzhiyun * This should be called after a bus scan is complete. It adjusts the memory 29*4882a593Smuzhiyun * ranges to fit with the devices actually found on the other side (downstream) 30*4882a593Smuzhiyun * of the bridge. 31*4882a593Smuzhiyun * 32*4882a593Smuzhiyun * @dev: Bridge device that was scanned 33*4882a593Smuzhiyun * @sub_bus: Bus number of the 'other side' of the bridge 34*4882a593Smuzhiyun */ 35*4882a593Smuzhiyun void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus); 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun /** 38*4882a593Smuzhiyun * dm_pciauto_config_device() - Configure a PCI device ready for use 39*4882a593Smuzhiyun * 40*4882a593Smuzhiyun * If the device is a bridge, downstream devices will be probed. 41*4882a593Smuzhiyun * 42*4882a593Smuzhiyun * @dev: Device to configure 43*4882a593Smuzhiyun * @return the maximum PCI bus number found by this device. If there are no 44*4882a593Smuzhiyun * bridges, this just returns the device's bus number. If the device is a 45*4882a593Smuzhiyun * bridge then it will return a larger number, depending on the devices on 46*4882a593Smuzhiyun * that bridge. On error, returns a -ve error number. 47*4882a593Smuzhiyun */ 48*4882a593Smuzhiyun int dm_pciauto_config_device(struct udevice *dev); 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun /** 51*4882a593Smuzhiyun * pci_get_bus() - Get a pointer to a bus, given its number 52*4882a593Smuzhiyun * 53*4882a593Smuzhiyun * This looks up a PCI bus based on its bus number. The bus is probed if 54*4882a593Smuzhiyun * necessary. 55*4882a593Smuzhiyun * 56*4882a593Smuzhiyun * @busnum: PCI bus number to look up 57*4882a593Smuzhiyun * @busp: Returns PCI bus on success 58*4882a593Smuzhiyun * @return 0 on success, or -ve error 59*4882a593Smuzhiyun */ 60*4882a593Smuzhiyun int pci_get_bus(int busnum, struct udevice **busp); 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun #endif 63