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/* pcifinddevice.c
*
*
* find a particular PCI device
* (we assume, the firmware configured the PCI bus[es] for us)
*
*/
/*
* Authorship
* ----------
* This software was created by
* Till Straumann <strauman@slac.stanford.edu>, 2001,
* Stanford Linear Accelerator Center, Stanford University.
*
* Acknowledgement of sponsorship
* ------------------------------
* This software was produced by
* the Stanford Linear Accelerator Center, Stanford University,
* under Contract DE-AC03-76SFO0515 with the Department of Energy.
*
* Government disclaimer of liability
* ----------------------------------
* Neither the United States nor the United States Department of Energy,
* nor any of their employees, makes any warranty, express or implied, or
* assumes any legal liability or responsibility for the accuracy,
* completeness, or usefulness of any data, apparatus, product, or process
* disclosed, or represents that its use would not infringe privately owned
* rights.
*
* Stanford disclaimer of liability
* --------------------------------
* Stanford University makes no representations or warranties, express or
* implied, nor assumes any liability for the use of this software.
*
* Stanford disclaimer of copyright
* --------------------------------
* Stanford University, owner of the copyright, hereby disclaims its
* copyright and all other rights in this software. Hence, anyone may
* freely use it for any purpose without restriction.
*
* Maintenance of notices
* ----------------------
* In the interest of clarity regarding the origin and status of this
* SLAC software, this and all the preceding Stanford University notices
* are to remain affixed to any copy or derivative of this software made
* or distributed by the recipient and are to be affixed to any copy of
* software made or distributed by the recipient that contains a copy or
* derivative of this software.
*
* ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
*/
/*
* Kate Feng <feng1@bnl.gov>, modified it to support the mvme5500 board.
*
*/
#define PCI_INVALID_VENDORDEVICEID 0xffffffff
#define PCI_MULTI_FUNCTION 0x80
#include <bsp/pci.h>
#include <rtems/bspIo.h>
#include <bsp.h>
int BSP_pciDebug=0;
int BSP_pciFindDevicePrint(unsigned short vendorid, unsigned short deviceid,
int instance, int *pbus, int *pdev, int *pfun )
{
int x;
BSP_pciDebug = 1;
x=pci_find_device(vendorid, deviceid, instance, pbus, pdev, pfun );
BSP_pciDebug = 0;
return 0;
}
int pci_find_device( unsigned short vendorid, unsigned short deviceid,
int instance, int *pbus, int *pdev, int *pfun )
{
uint32_t d;
uint16_t s;
unsigned char bus,dev;
uint8_t fun, hd;
for (bus=0; bus<BSP_MAX_PCI_BUS; bus++) {
for (dev=0; dev<PCI_MAX_DEVICES; dev++) {
pci_read_config_byte(bus, dev, 0, PCI_HEADER_TYPE, &hd);
hd = (hd & PCI_MULTI_FUNCTION ? PCI_MAX_FUNCTIONS : 1);
for (fun=0; fun<hd; fun++) {
/*
* The last devfn id/slot is special; must skip it
*/
if (PCI_MAX_DEVICES-1==dev && PCI_MAX_FUNCTIONS-1 == fun)
break;
(void)pci_read_config_dword(bus,dev,fun,PCI_VENDOR_ID,&d);
if (PCI_INVALID_VENDORDEVICEID == d)
continue;
if (BSP_pciDebug) {
printk("pci_find_device: found 0x%08x at %2d/%2d/%2d ",d,bus,dev,fun);
printk("(Physically: PCI%d %2d/%2d/%2d)\n",
(bus>= BSP_MAX_PCI_BUS_ON_PCI0)? 1:0,
(bus>= BSP_MAX_PCI_BUS_ON_PCI0)? bus-BSP_MAX_PCI_BUS_ON_PCI0:bus,
dev, fun);
}
(void)pci_read_config_word(bus,dev,fun,PCI_VENDOR_ID,&s);
if (vendorid != s)
continue;
(void)pci_read_config_word(bus,dev,fun,PCI_DEVICE_ID,&s);
if (deviceid == s) {
if (instance--) continue;
*pbus=bus; *pdev=dev; *pfun=fun;
return 0;
}
}
}
} /* end for bus */
return -1;
}
/* eof */
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