forked from Imagelibrary/rtems
9384ac2d65
This patch changes the license to BSD-2 for all source files where the copyright is held by Aeroflex Gaisler, Cobham Gaisler, or Gaisler Research. Some files also includes copyright right statements from OAR and/or embedded Brains in addition to Gaisler. Updates #3053.
141 lines
4.9 KiB
C
141 lines
4.9 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @brief PCI Library
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*
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* Defines in this file was taken from FreeBSD and auto-generated
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* pci_ids.h reused from RTEMS.
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*
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*/
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/*
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* COPYRIGHT (c) 2009 Cobham Gaisler AB.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __PCI_H__
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#define __PCI_H__
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#include <pci/pcireg.h>
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#include <pci/ids.h>
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#define PCI_INVALID_VENDORDEVICEID 0xffffffff
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#define PCID_CLASS(class, dev) ((class << 8) | dev)
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#define PCID_PCI2PCI_BRIDGE PCID_CLASS(PCIC_BRIDGE, PCIS_BRIDGE_PCI)
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#include <pci/access.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* The PCI Library have the following build time configuration options. It is
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* up to the BSP header file (bsp.h) to set options properly.
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*
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* BSP_PCI_BIG_ENDIAN - Access inline routines will be for a big-endian PCI
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* bus, if not defined the routines will assume that
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* PCI is as the standard defines: little-endian.
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*
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* Note that drivers may be run-time configurable,
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* meaning that they may adopt to either big-endian or
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* little-endian PCI bus, the host driver or BSP may
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* detect endianness during run-time.
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*/
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/* Error return values */
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enum {
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PCISTS_ERR = -1, /* Undefined Error */
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PCISTS_OK = 0,
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PCISTS_EINVAL = 1, /* Bad input arguments */
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PCISTS_MSTABRT = 2, /* CFG space access error (can be ignored) */
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};
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/* PCI System type can be used to determine system for drivers. Normally
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* the system is Host, but the peripheral configuration library also supports
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* being PCI peripheral not allowed to access configuration space.
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*
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* The active configuration Library set this variable.
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*/
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enum pci_system_type {
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PCI_SYSTEM_NONE = 0,
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PCI_SYSTEM_HOST = 1,
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PCI_SYSTEM_PERIPHERAL = 2,
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};
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extern enum pci_system_type pci_system_type;
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/* PCI Bus Endianness. The PCI specification is little endian, however on some
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* embedded systems (AT697-LEON2 for example) the PCI bus is defined as big
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* endian (non-standard) in order to avoid byte-twisting.
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*/
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enum {
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PCI_LITTLE_ENDIAN = 0,
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PCI_BIG_ENDIAN = 1,
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};
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extern int pci_endian;
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/* Return the number of PCI busses in the system */
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extern int pci_bus_count(void);
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/* Scan the PCI bus and print the PCI device/functions/bridges and their
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* current resources and size to the system console.
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*/
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extern void pci_print(void);
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/* Print current configuration of a single PCI device by reading PCI
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* configuration space
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*/
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extern void pci_print_dev(pci_dev_t dev);
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extern void pci_print_device(int bus, int slot, int function);
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/*** PCI Configuration Space direct access routines ***/
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/* Function iterates over all PCI buses/devices/functions and calls
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* func(PCIDEV,arg) for each present device. The iteration is stopped if
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* func() returns non-zero result the same result is returned. As long
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* as func() returns zero the function will keep on iterating, when all
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* devices has been processed the function return zero.
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*
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* The function iterates over all devices/functions on all buses by accessing
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* configuration space directly (PCI RAM data structures not used). This
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* function is valid to call after PCI buses have been enumrated.
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*/
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extern int pci_for_each(int (*func)(pci_dev_t, void*), void *arg);
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/* Get PCI Configuration space BUS|SLOT|FUNC for a device matching PCI
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* Vendor, Device and instance number 'index'.
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*
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* Return Values
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* -1 pci_find_dev did not find a device matching the criterion.
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* 0 device was found, *pdev was updated with the device's BUS|SLOT|FUNC
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*/
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extern int pci_find(uint16_t ven, uint16_t dev, int index, pci_dev_t *pdev);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __PCI_H__ */
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