diff options
Diffstat (limited to 'drivers/pci/ecam.h')
| -rw-r--r-- | drivers/pci/ecam.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/pci/ecam.h b/drivers/pci/ecam.h new file mode 100644 index 000000000..9878bebd4 --- /dev/null +++ b/drivers/pci/ecam.h @@ -0,0 +1,67 @@ +/* + * 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 device *, + 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 */ + }; +}; + +/* 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 |