pcibios.h

[hv at uninova.pt (Hugo)]

Hi!

I am trying to use pcibios.h but so far I have been unable.

In the end of this message I show the part of the code that scans the
PCI.

Everytime I use pcib_conf_write32 I get the return -6.

Could anyone please tell me what I am doing wrong?!

Many thanks
  HV


Here's the code:



#define PCI_CONFIG_ADDR 0x0CF8
#define PCI_CONFIG_DATA 0x0CFC



int pcibios_read_config_dword (unsigned char bus, unsigned char dev,
unsigned char fun, unsigned int *val) {


  int res;

  int sig = PCIB_DEVSIG_MAKE( bus, dev, fun );
                                                                                                                                                                            
  res = pcib_conf_write32( sig, PCI_CONFIG_ADDR, *val );


  if ( res < 0 ) {
    perror("write32.");
    return -1;
  }

  res = pcib_conf_read32( sig, PCI_CONFIG_DATA, val );
  if ( res < 0 ) {
    perror("read32.");
    return -2;
  }

  return 0;
}



int find_pci( ) {
  int pci_bus =0;
  int pci_dev;
  int pci_fun;
  int dev_num = 0;
                                                                                                                                                                            
  int res = pcib_init();
                                                                                                                                                                            
  printf( "INIT: %d\n", res );
                                                                                                                                                                            
  for( pci_dev=0; pci_dev<32; pci_dev++ ) {
    for( pci_fun=0; pci_fun<8; pci_fun++ ) {
      unsigned int pci_id = 0;
                                                                                                                                                                            
      pcibios_read_config_dword( pci_bus, pci_dev, pci_fun, &pci_id );
                                                                                                                                                                             
      if ( pci_id == 0xFFFFFFFF ) {
        continue;
      }
                                      
      dev_num++;

      printf( "Found pci_id: %x\n", pci_id );
    }
  }

  return 0;
}