arch/cris/arch-v32/drivers/pci/bios.c

   1 #include <linux/pci.h>
   2 #include <linux/kernel.h>
   3 #include <arch/hwregs/intr_vect.h>
   4
   5 void pcibios_fixup_bus(struct pci_bus *b)
   6 {
   7 }
   8
   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
  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
  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
  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
  83 int pcibios_enable_irq(struct pci_dev *dev)
  84 {
  85         dev->irq = EXT_INTR_VECT;
  86         return 0;
  87 }
  88
  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 }