1 #include <linux/pci.h>
2 #include <linux/kernel.h>
3 #include <arch/hwregs/intr_vect.h>
4
pcibios_fixup_bus(struct pci_bus * b)5 void pcibios_fixup_bus(struct pci_bus *b)
6 {
7 }
8
pcibios_set_master(struct pci_dev * dev)9 void pcibios_set_master(struct pci_dev *dev)
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
pci_mmap_page_range(struct pci_dev * dev,struct vm_area_struct * vma,enum pci_mmap_state mmap_state,int write_combine)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
39 resource_size_t
pcibios_align_resource(void * data,const struct resource * res,resource_size_t size,resource_size_t align)40 pcibios_align_resource(void *data, const struct resource *res,
41 resource_size_t size, resource_size_t align)
42 {
43 resource_size_t start = res->start;
44
45 if ((res->flags & IORESOURCE_IO) && (start & 0x300))
46 start = (start + 0x3ff) & ~0x3ff;
47
48 return start;
49 }
50
pcibios_enable_resources(struct pci_dev * dev,int mask)51 int pcibios_enable_resources(struct pci_dev *dev, int mask)
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
pcibios_enable_irq(struct pci_dev * dev)83 int pcibios_enable_irq(struct pci_dev *dev)
84 {
85 dev->irq = EXT_INTR_VECT;
86 return 0;
87 }
88
pcibios_enable_device(struct pci_dev * dev,int mask)89 int pcibios_enable_device(struct pci_dev *dev, int mask)
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 }
100