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/* Author: Till Straumann <strauman@slac.stanford.edu>, 2001 */
/* find a particular PCI device
* (we assume, the firmware configured the PCI bus[es] for us)
*
* $Id$
*/
#define PCI_INVALID_VENDORDEVICEID 0xffffffff
#define PCI_MULTI_FUNCTION 0x80
#include <bsp/pci.h>
#include <rtems/bspIo.h>
#include <stdio.h>
/* Stolen from i386... */
/*
* Make device signature from bus number, device number and function
* number
*/
#define PCIB_DEVSIG_MAKE(b,d,f) ((b<<8)|(d<<3)|(f))
/*
* Extract various parts from device signature
*/
#define PCIB_DEVSIG_BUS(x) (((x)>>8) &0xff)
#define PCIB_DEVSIG_DEV(x) (((x)>>3) & 0x1f)
#define PCIB_DEVSIG_FUNC(x) ((x) & 0x7)
typedef struct {
unsigned short vid,did;
int inst;
} fd_arg;
static int
find_dev_cb(
int bus,
int dev,
int fun,
void *uarg
) {
fd_arg *a = uarg;
unsigned short s;
pci_read_config_word(bus,dev,fun,PCI_VENDOR_ID,&s);
if (a->vid == s) {
pci_read_config_word(bus,dev,fun,PCI_DEVICE_ID,&s);
if (a->did == s && 0 == a->inst-- ) {
a->inst = PCIB_DEVSIG_MAKE( bus, dev, fun );
return 1;
}
}
return 0;
}
int
pci_find_device(
unsigned short vendorid,
unsigned short deviceid,
int instance,
int *pbus,
int *pdev,
int *pfun
) {
fd_arg a;
void *h;
a.vid = vendorid;
a.did = deviceid;
a.inst = instance;
if ( (h = BSP_pciScan(0, find_dev_cb, (void*)&a)) ) {
*pbus = PCIB_DEVSIG_BUS( a.inst );
*pdev = PCIB_DEVSIG_DEV( a.inst );
*pfun = PCIB_DEVSIG_FUNC( a.inst );
return 0;
}
return -1;
}
static int
dump_dev_cb(
int bus,
int dev,
int fun,
void *uarg
) {
unsigned short vi,di;
unsigned short cd,st;
unsigned int b1,b2;
unsigned char il,ip;
FILE *f = uarg;
pci_read_config_word (bus, dev, fun, PCI_VENDOR_ID, &vi);
pci_read_config_word (bus, dev, fun, PCI_DEVICE_ID, &di);
pci_read_config_word (bus, dev, fun, PCI_COMMAND, &cd);
pci_read_config_word (bus, dev, fun, PCI_STATUS, &st);
pci_read_config_dword(bus, dev, fun, PCI_BASE_ADDRESS_0, &b1);
pci_read_config_dword(bus, dev, fun, PCI_BASE_ADDRESS_1, &b2);
pci_read_config_byte (bus, dev, fun, PCI_INTERRUPT_LINE, &il);
pci_read_config_byte (bus, dev, fun, PCI_INTERRUPT_PIN, &ip);
fprintf(f,"%3d:0x%02x:%d 0x%04x-0x%04x: 0x%04x 0x%04x 0x%08x 0x%08x %d -> %3d (=0x%02x)\n",
bus, dev, fun, vi, di, cd, st, b1, b2, ip, il, il);
return 0;
}
void
BSP_pciConfigDump(FILE *f)
{
if ( !f )
f = stdout;
fprintf(f,"BUS:SLOT:FUN VENDOR-DEV_ID: COMMAND STATUS BASE_ADDR0 BASE_ADDR1 IRQ_PIN -> IRQ_LINE\n");
BSP_pciScan(0, dump_dev_cb, f);
}
BSP_PciScanHandle
BSP_pciScan(
BSP_PciScanHandle handle,
BSP_PciScannerCb cb,
void *uarg
) {
unsigned int d;
unsigned char bus,dev,fun,hd;
bus = PCIB_DEVSIG_BUS( (unsigned long)handle );
dev = PCIB_DEVSIG_DEV( (unsigned long)handle );
fun = PCIB_DEVSIG_FUNC( (unsigned long)handle );
hd = fun > 0 ? PCI_MAX_FUNCTIONS : 1;
for (; bus<pci_bus_count(); bus++, dev=0) {
for (; dev<PCI_MAX_DEVICES; dev++, fun=0) {
for (; 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,0,PCI_VENDOR_ID,&d);
if (PCI_INVALID_VENDORDEVICEID == d)
continue;
if ( 0 == fun ) {
pci_read_config_byte(bus,dev,0, PCI_HEADER_TYPE, &hd);
hd = (hd & PCI_MULTI_FUNCTION ? PCI_MAX_FUNCTIONS : 1);
}
(void)pci_read_config_dword(bus,dev,fun,PCI_VENDOR_ID,&d);
if (PCI_INVALID_VENDORDEVICEID == d)
continue;
#ifdef PCI_DEBUG
printk("BSP_pciScan: found 0x%08x at %d/x%02x/%d\n",d,bus,dev,fun);
#endif
if ( cb(bus,dev,fun,uarg) > 0 ) {
if ( ++fun >= hd ) {
fun = 0;
if ( ++dev >= PCI_MAX_DEVICES ) {
dev = 0;
bus++;
}
}
return (void*) PCIB_DEVSIG_MAKE(bus,dev,fun);
}
}
}
}
return 0;
}
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