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/*
* Copyright 2016 Broadcom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation (the "GPL").
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 (GPLv2) for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 (GPLv2) along with this source code.
*/
#ifndef DRIVERS_PCI_ECAM_H
#define DRIVERS_PCI_ECAM_H
#include <linux/kernel.h>
#include <linux/platform_device.h>
/*
* struct to hold pci ops and bus shift of the config window
* for a PCI controller.
*/
struct pci_config_window;
struct pci_ecam_ops {
unsigned int bus_shift;
struct pci_ops pci_ops;
int (*init)(struct pci_config_window *);
};
/*
* struct to hold the mappings of a config space window. This
* is expected to be used as sysdata for PCI controllers that
* use ECAM.
*/
struct pci_config_window {
struct resource res;
struct resource busr;
void *priv;
struct pci_ecam_ops *ops;
union {
void __iomem *win; /* 64-bit single mapping */
void __iomem **winp; /* 32-bit per-bus mapping */
};
struct device *parent;/* ECAM res was from this dev */
};
/* create and free pci_config_window */
struct pci_config_window *pci_ecam_create(struct device *dev,
struct resource *cfgres, struct resource *busr,
struct pci_ecam_ops *ops);
void pci_ecam_free(struct pci_config_window *cfg);
/* map_bus when ->sysdata is an instance of pci_config_window */
void __iomem *pci_ecam_map_bus(struct pci_bus *bus, unsigned int devfn,
int where);
/* default ECAM ops */
extern struct pci_ecam_ops pci_generic_ecam_ops;
#ifdef CONFIG_PCI_HOST_GENERIC
/* for DT-based PCI controllers that support ECAM */
int pci_host_common_probe(struct platform_device *pdev,
struct pci_ecam_ops *ops);
#endif
#endif
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