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/* PCI Help function, Find a PCI device by VENDOR/DEVICE ID
*
* COPYRIGHT (c) 2010 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.
*/
#include <pci.h>
#include <pci/cfg.h>
struct compare_info {
int index;
uint16_t vendor;
uint16_t device;
};
static int compare_dev_id(struct pci_dev *dev, void *arg)
{
struct compare_info *info = arg;
if ((dev->vendor != info->vendor) || (dev->device != info->device))
return 0;
if (info->index-- == 0)
return (int)dev;
else
return 0;
}
/* Find a Device in PCI device tree located in RAM */
int pci_find_dev(uint16_t ven, uint16_t dev, int index, struct pci_dev **ppdev)
{
struct compare_info info;
int result;
info.index = index;
info.vendor = ven;
info.device = dev;
result = pci_for_each_dev(compare_dev_id, &info);
if (ppdev)
*ppdev = (struct pci_dev *)result;
if (result == 0)
return -1;
else
return 0;
}
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