1 /*
2 * $Id: compat.c,v 1.1 1998/02/16 10:35:50 mj Exp $
3 *
4 * PCI Bus Services -- Function For Backward Compatibility
5 *
6 * Copyright 1998--2000 Martin Mares <mj@suse.cz>
7 */
8
9 #include <linux/types.h>
10 #include <linux/kernel.h>
11 #include <linux/pci.h>
12
13 int
14 pcibios_present(void)
15 {
16 return !list_empty(&pci_devices);
17 }
18
19 int
20 pcibios_find_class(unsigned int class, unsigned short index, unsigned char *bus, unsigned char *devfn)
21 {
22 const struct pci_dev *dev = NULL;
23 int cnt = 0;
24
25 while ((dev = pci_find_class(class, dev)))
26 if (index == cnt++) {
27 *bus = dev->bus->number;
28 *devfn = dev->devfn;
29 return PCIBIOS_SUCCESSFUL;
30 }
31 return PCIBIOS_DEVICE_NOT_FOUND;
32 }
33
34
35 int
36 pcibios_find_device(unsigned short vendor, unsigned short device, unsigned short index,
37 unsigned char *bus, unsigned char *devfn)
38 {
39 const struct pci_dev *dev = NULL;
40 int cnt = 0;
41
42 while ((dev = pci_find_device(vendor, device, dev)))
43 if (index == cnt++) {
44 *bus = dev->bus->number;
45 *devfn = dev->devfn;
46 return PCIBIOS_SUCCESSFUL;
47 }
48 return PCIBIOS_DEVICE_NOT_FOUND;
49 }
50
51 #define PCI_OP(rw,size,type) \
52 int pcibios_##rw##_config_##size (unsigned char bus, unsigned char dev_fn, \
53 unsigned char where, unsigned type val) \
54 { \
55 struct pci_dev *dev = pci_find_slot(bus, dev_fn); \
56 if (!dev) return PCIBIOS_DEVICE_NOT_FOUND; \
57 return pci_##rw##_config_##size(dev, where, val); \
58 }
59
60 PCI_OP(read, byte, char *)
61 PCI_OP(read, word, short *)
62 PCI_OP(read, dword, int *)
63 PCI_OP(write, byte, char)
64 PCI_OP(write, word, short)
65 PCI_OP(write, dword, int)
66
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