source: rtems/cpukit/libpci/pci_find_dev.c @ 71e8a5c

4.11
Last change on this file since 71e8a5c was 71e8a5c, checked in by Daniel Hellstrom <daniel@…>, on Feb 27, 2015 at 3:45:59 PM

LIBPCI: moved copyright into a single line

  • Property mode set to 100644
File size: 1017 bytes
Line 
1/*  PCI Help function, Find a PCI device by VENDOR/DEVICE ID
2 *
3 *  COPYRIGHT (c) 2010 Cobham Gaisler AB.
4 *
5 *  The license and distribution terms for this file may be
6 *  found in the file LICENSE in this distribution or at
7 *  http://www.rtems.com/license/LICENSE.
8 */
9
10#include <pci.h>
11#include <pci/cfg.h>
12
13struct compare_info {
14        int index;
15        uint16_t vendor;
16        uint16_t device;
17};
18
19static int compare_dev_id(struct pci_dev *dev, void *arg)
20{
21        struct compare_info *info = arg;
22
23        if ((dev->vendor != info->vendor) || (dev->device != info->device))
24                return 0;
25        if (info->index-- == 0)
26                return (int)dev;
27        else
28                return 0;
29}
30
31/* Find a Device in PCI device tree located in RAM */
32int pci_find_dev(uint16_t ven, uint16_t dev, int index, struct pci_dev **ppdev)
33{
34        struct compare_info info;
35        int result;
36
37        info.index = index;
38        info.vendor = ven;
39        info.device = dev;
40
41        result = pci_for_each_dev(compare_dev_id, &info);
42        if (ppdev)
43                *ppdev = (struct pci_dev *)result;
44        if (result == 0)
45                return -1;
46        else
47                return 0;
48}
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