| Jayachandran C | 35ff947 | 2016-05-10 17:19:51 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2016 Broadcom |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License, version 2, as |
| 6 | * published by the Free Software Foundation (the "GPL"). |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License version 2 (GPLv2) for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * version 2 (GPLv2) along with this source code. |
| 15 | */ |
| 16 | #ifndef DRIVERS_PCI_ECAM_H |
| 17 | #define DRIVERS_PCI_ECAM_H |
| 18 | |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | |
| 22 | /* |
| 23 | * struct to hold pci ops and bus shift of the config window |
| 24 | * for a PCI controller. |
| 25 | */ |
| 26 | struct pci_config_window; |
| 27 | struct pci_ecam_ops { |
| 28 | unsigned int bus_shift; |
| 29 | struct pci_ops pci_ops; |
| 30 | int (*init)(struct device *, |
| 31 | struct pci_config_window *); |
| 32 | }; |
| 33 | |
| 34 | /* |
| 35 | * struct to hold the mappings of a config space window. This |
| 36 | * is expected to be used as sysdata for PCI controllers that |
| 37 | * use ECAM. |
| 38 | */ |
| 39 | struct pci_config_window { |
| 40 | struct resource res; |
| 41 | struct resource busr; |
| 42 | void *priv; |
| 43 | struct pci_ecam_ops *ops; |
| 44 | union { |
| 45 | void __iomem *win; /* 64-bit single mapping */ |
| 46 | void __iomem **winp; /* 32-bit per-bus mapping */ |
| 47 | }; |
| 48 | }; |
| 49 | |
| 50 | /* create and free pci_config_window */ |
| 51 | struct pci_config_window *pci_ecam_create(struct device *dev, |
| 52 | struct resource *cfgres, struct resource *busr, |
| 53 | struct pci_ecam_ops *ops); |
| 54 | void pci_ecam_free(struct pci_config_window *cfg); |
| 55 | |
| 56 | /* map_bus when ->sysdata is an instance of pci_config_window */ |
| 57 | void __iomem *pci_ecam_map_bus(struct pci_bus *bus, unsigned int devfn, |
| 58 | int where); |
| 59 | /* default ECAM ops */ |
| 60 | extern struct pci_ecam_ops pci_generic_ecam_ops; |
| 61 | |
| 62 | #endif |