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Diffstat (limited to 'include/pci.h')
| -rw-r--r-- | include/pci.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/include/pci.h b/include/pci.h new file mode 100644 index 0000000000..a0e008a2d0 --- /dev/null +++ b/include/pci.h @@ -0,0 +1,114 @@ +/* + * PCI library. Defines in this file was taken from FreeBSD and auto-generated + * pci_ids.h reused from RTEMS. + * + * COPYRIGHT (c) 2009 Cobham Gaisler AB. + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef __PCI_H__ +#define __PCI_H__ + +#include <pci/pcireg.h> +#include <pci/ids.h> + +#define PCI_INVALID_VENDORDEVICEID 0xffffffff + +#define PCID_CLASS(class, dev) ((class << 8) | dev) +#define PCID_PCI2PCI_BRIDGE PCID_CLASS(PCIC_BRIDGE, PCIS_BRIDGE_PCI) + +#include <pci/access.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* The PCI Library have the following build time configuration options. It is + * up to the BSP header file (bsp.h) to set options properly. + * + * BSP_PCI_BIG_ENDIAN - Access inline routines will be for a big-endian PCI + * bus, if not defined the routines will assume that + * PCI is as the standard defines: little-endian. + * + * Note that drivers may be run-time configurable, + * meaning that they may adopt to either big-endian or + * little-endian PCI bus, the host driver or BSP may + * detect endianness during run-time. + */ + +/* Error return values */ +enum { + PCISTS_ERR = -1, /* Undefined Error */ + PCISTS_OK = 0, + PCISTS_EINVAL = 1, /* Bad input arguments */ + PCISTS_MSTABRT = 2, /* CFG space access error (can be ignored) */ +}; + +/* PCI System type can be used to determine system for drivers. Normally + * the system is Host, but the peripheral configuration library also supports + * being PCI peripheral not allowed to access configuration space. + * + * The active configuration Library set this variable. + */ +enum pci_system_type { + PCI_SYSTEM_NONE = 0, + PCI_SYSTEM_HOST = 1, + PCI_SYSTEM_PERIPHERAL = 2, +}; +extern enum pci_system_type pci_system_type; + +/* PCI Bus Endianness. The PCI specification is little endian, however on some + * embedded systems (AT697-LEON2 for example) the PCI bus is defined as big + * endian (non-standard) in order to avoid byte-twisting. + */ +enum { + PCI_LITTLE_ENDIAN = 0, + PCI_BIG_ENDIAN = 1, +}; +extern int pci_endian; + +/* Return the number of PCI busses in the system */ +extern int pci_bus_count(void); + +/* Scan the PCI bus and print the PCI device/functions/bridges and their + * current resources and size to the system console. + */ +extern void pci_print(void); + +/* Print current configuration of a single PCI device by reading PCI + * configuration space + */ +extern void pci_print_dev(pci_dev_t dev); +extern void pci_print_device(int bus, int slot, int function); + +/*** PCI Configuration Space direct access routines ***/ + +/* Function iterates over all PCI buses/devices/functions and calls + * func(PCIDEV,arg) for each present device. The iteration is stopped if + * func() returns non-zero result the same result is returned. As long + * as func() returns zero the function will keep on iterating, when all + * devices has been processed the function return zero. + * + * The function iterates over all devices/functions on all buses by accessing + * configuration space directly (PCI RAM data structures not used). This + * function is valid to call after PCI buses have been enumrated. + */ +extern int pci_for_each(int (*func)(pci_dev_t, void*), void *arg); + +/* Get PCI Configuration space BUS|SLOT|FUNC for a device matching PCI + * Vendor, Device and instance number 'index'. + * + * Return Values + * -1 pci_find_dev did not find a device matching the criterion. + * 0 device was found, *pdev was updated with the device's BUS|SLOT|FUNC + */ +extern int pci_find(uint16_t ven, uint16_t dev, int index, pci_dev_t *pdev); + +#ifdef __cplusplus +} +#endif + +#endif /* __PCI_H__ */ |