Linux Kernel  3.7.1
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bios.c
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1 #include <linux/pci.h>
2 #include <linux/kernel.h>
3 #include <arch/hwregs/intr_vect.h>
4 
6 {
7 }
8 
10 {
11  u8 lat;
12  pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
13  printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat);
14  pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
15 }
16 
17 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
18  enum pci_mmap_state mmap_state, int write_combine)
19 {
20  unsigned long prot;
21 
22  /* Leave vm_pgoff as-is, the PCI space address is the physical
23  * address on this platform.
24  */
25  prot = pgprot_val(vma->vm_page_prot);
26  vma->vm_page_prot = __pgprot(prot);
27 
28  /* Write-combine setting is ignored, it is changed via the mtrr
29  * interfaces on this platform.
30  */
31  if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
32  vma->vm_end - vma->vm_start,
33  vma->vm_page_prot))
34  return -EAGAIN;
35 
36  return 0;
37 }
38 
40 pcibios_align_resource(void *data, const struct resource *res,
42 {
44 
45  if ((res->flags & IORESOURCE_IO) && (start & 0x300))
46  start = (start + 0x3ff) & ~0x3ff;
47 
48  return start;
49 }
50 
52 {
53  u16 cmd, old_cmd;
54  int idx;
55  struct resource *r;
56 
57  pci_read_config_word(dev, PCI_COMMAND, &cmd);
58  old_cmd = cmd;
59  for(idx=0; idx<6; idx++) {
60  /* Only set up the requested stuff */
61  if (!(mask & (1<<idx)))
62  continue;
63 
64  r = &dev->resource[idx];
65  if (!r->start && r->end) {
66  printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
67  return -EINVAL;
68  }
69  if (r->flags & IORESOURCE_IO)
70  cmd |= PCI_COMMAND_IO;
71  if (r->flags & IORESOURCE_MEM)
72  cmd |= PCI_COMMAND_MEMORY;
73  }
74  if (dev->resource[PCI_ROM_RESOURCE].start)
75  cmd |= PCI_COMMAND_MEMORY;
76  if (cmd != old_cmd) {
77  printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
78  pci_write_config_word(dev, PCI_COMMAND, cmd);
79  }
80  return 0;
81 }
82 
84 {
85  dev->irq = EXT_INTR_VECT;
86  return 0;
87 }
88 
90 {
91  int err;
92 
93  if ((err = pcibios_enable_resources(dev, mask)) < 0)
94  return err;
95 
96  if (!dev->msi_enabled)
97  pcibios_enable_irq(dev);
98  return 0;
99 }