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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
*/
#ifndef _PCI_I386_H_
#define _PCI_I386_H_
#include <pci.h>
/* bus mapping constants (used for PCI core initialization) */
#define PCI_REG_ADDR 0xcf8
#define PCI_REG_DATA 0xcfc
#define PCI_CFG_EN 0x80000000
#ifndef __ASSEMBLY__
/**
* pci_x86_read_config() - Read a configuration value from a device
*
* This function can be called before PCI is set up in driver model.
*
* @bdf: PCI device address: bus, device and function -see PCI_BDF()
* @offset: Register offset to read
* @valuep: Place to put the returned value
* @size: Access size
* @return 0 if OK, -ve on error
*/
int pci_x86_read_config(pci_dev_t bdf, uint offset, ulong *valuep,
enum pci_size_t size);
/**
* pci_bus_write_config() - Write a configuration value to a device
*
* This function can be called before PCI is set up in driver model.
*
* @bdf: PCI device address: bus, device and function -see PCI_BDF()
* @offset: Register offset to write
* @value: Value to write
* @size: Access size
* @return 0 if OK, -ve on error
*/
int pci_x86_write_config(pci_dev_t bdf, uint offset, ulong value,
enum pci_size_t size);
/**
* pci_bus_clrset_config32() - Update a configuration value for a device
*
* The register at @offset is updated to (oldvalue & ~clr) | set. This function
* can be called before PCI is set up in driver model.
*
* @bdf: PCI device address: bus, device and function -see PCI_BDF()
* @offset: Register offset to update
* @clr: Bits to clear
* @set: Bits to set
* @return 0 if OK, -ve on error
*/
int pci_x86_clrset_config(pci_dev_t bdf, uint offset, ulong clr, ulong set,
enum pci_size_t size);
/**
* Assign IRQ number to a PCI device
*
* This function assigns IRQ for a PCI device. If the device does not exist
* or does not require interrupts then this function has no effect.
*
* @bus: PCI bus number
* @device: PCI device number
* @irq: An array of IRQ numbers that are assigned to INTA through
* INTD of this PCI device.
*/
void pci_assign_irqs(int bus, int device, u8 irq[4]);
#endif /* __ASSEMBLY__ */
#endif /* _PCI_I386_H_ */
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