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/*
* find a particular PCI device
* (we assume, the firmware configured the PCI bus[es] for us)
*/
/*
* Copyright 2001, Till Straumann <strauman@slac.stanford.edu>
*
* Kate Feng <feng1@bnl.gov>, modified it to support the mvme5500 board.
*/
#include <bsp/pci.h>
#include <rtems/bspIo.h>
#include <bsp.h>
static int BSP_pciDebug=0;
int pci_find_device( unsigned short vendorid, unsigned short deviceid,
int instance, int *pbus, int *pdev, int *pfun )
{
uint32_t d;
unsigned short s;
unsigned char bus,dev,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_HEADER_TYPE_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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