a2b9c60c2777e6cf39b94b0789fccf15307ced19
[linux-2.6.git] / arch / cris / arch-v32 / drivers / pci / bios.c
1 #include <linux/pci.h>
2 #include <linux/kernel.h>
3 #include <asm/arch/hwregs/intr_vect.h>
4
5 void __devinit  pcibios_fixup_bus(struct pci_bus *b)
6 {
7 }
8
9 char * __devinit  pcibios_setup(char *str)
10 {
11         return NULL;
12 }
13
14 void pcibios_set_master(struct pci_dev *dev)
15 {
16         u8 lat;
17         pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
18         printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat);
19         pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
20 }
21
22 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
23                         enum pci_mmap_state mmap_state, int write_combine)
24 {
25         unsigned long prot;
26
27         /* Leave vm_pgoff as-is, the PCI space address is the physical
28          * address on this platform.
29          */
30         prot = pgprot_val(vma->vm_page_prot);
31         vma->vm_page_prot = __pgprot(prot);
32
33         /* Write-combine setting is ignored, it is changed via the mtrr
34          * interfaces on this platform.
35          */
36         if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
37                              vma->vm_end - vma->vm_start,
38                              vma->vm_page_prot))
39                 return -EAGAIN;
40
41         return 0;
42 }
43
44 void
45 pcibios_align_resource(void *data, struct resource *res,
46                        resource_size_t size, resource_size_t align)
47 {
48         if (res->flags & IORESOURCE_IO) {
49                 resource_size_t start = res->start;
50
51                 if (start & 0x300) {
52                         start = (start + 0x3ff) & ~0x3ff;
53                         res->start = start;
54                 }
55         }
56 }
57
58 int pcibios_enable_resources(struct pci_dev *dev, int mask)
59 {
60         u16 cmd, old_cmd;
61         int idx;
62         struct resource *r;
63
64         pci_read_config_word(dev, PCI_COMMAND, &cmd);
65         old_cmd = cmd;
66         for(idx=0; idx<6; idx++) {
67                 /* Only set up the requested stuff */
68                 if (!(mask & (1<<idx)))
69                         continue;
70
71                 r = &dev->resource[idx];
72                 if (!r->start && r->end) {
73                         printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
74                         return -EINVAL;
75                 }
76                 if (r->flags & IORESOURCE_IO)
77                         cmd |= PCI_COMMAND_IO;
78                 if (r->flags & IORESOURCE_MEM)
79                         cmd |= PCI_COMMAND_MEMORY;
80         }
81         if (dev->resource[PCI_ROM_RESOURCE].start)
82                 cmd |= PCI_COMMAND_MEMORY;
83         if (cmd != old_cmd) {
84                 printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
85                 pci_write_config_word(dev, PCI_COMMAND, cmd);
86         }
87         return 0;
88 }
89
90 int pcibios_enable_irq(struct pci_dev *dev)
91 {
92         dev->irq = EXT_INTR_VECT;
93         return 0;
94 }
95
96 int pcibios_enable_device(struct pci_dev *dev, int mask)
97 {
98         int err;
99
100         if ((err = pcibios_enable_resources(dev, mask)) < 0)
101                 return err;
102
103         return pcibios_enable_irq(dev);
104 }
105
106 int pcibios_assign_resources(void)
107 {
108         struct pci_dev *dev = NULL;
109         int idx;
110         struct resource *r;
111
112         while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
113                 int class = dev->class >> 8;
114
115                 /* Don't touch classless devices and host bridges */
116                 if (!class || class == PCI_CLASS_BRIDGE_HOST)
117                         continue;
118
119                 for(idx=0; idx<6; idx++) {
120                         r = &dev->resource[idx];
121
122                         if (!r->start && r->end)
123                                 pci_assign_resource(dev, idx);
124                 }
125         }
126         return 0;
127 }
128
129 EXPORT_SYMBOL(pcibios_assign_resources);