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         vma->vm_flags |= (VM_SHM | VM_LOCKED | VM_IO);
  31
  32         prot = pgprot_val(vma->vm_page_prot);
  33         vma->vm_page_prot = __pgprot(prot);
  34
  35         /* Write-combine setting is ignored, it is changed via the mtrr
  36          * interfaces on this platform.
  37          */
  38         if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
  39                              vma->vm_end - vma->vm_start,
  40                              vma->vm_page_prot))
  41                 return -EAGAIN;
  42
  43         return 0;
  44 }
  45
  46 void
  47 pcibios_align_resource(void *data, struct resource *res,
  48                        unsigned long size, unsigned long align)
  49 {
  50         if (res->flags & IORESOURCE_IO) {
  51                 unsigned long start = res->start;
  52
  53                 if (start & 0x300) {
  54                         start = (start + 0x3ff) & ~0x3ff;
  55                         res->start = start;
  56                 }
  57         }
  58 }
  59
  60 int pcibios_enable_resources(struct pci_dev *dev, int mask)
  61 {
  62         u16 cmd, old_cmd;
  63         int idx;
  64         struct resource *r;
  65
  66         pci_read_config_word(dev, PCI_COMMAND, &cmd);
  67         old_cmd = cmd;
  68         for(idx=0; idx<6; idx++) {
  69                 /* Only set up the requested stuff */
  70                 if (!(mask & (1<<idx)))
  71                         continue;
  72
  73                 r = &dev->resource[idx];
  74                 if (!r->start && r->end) {
  75                         printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
  76                         return -EINVAL;
  77                 }
  78                 if (r->flags & IORESOURCE_IO)
  79                         cmd |= PCI_COMMAND_IO;
  80                 if (r->flags & IORESOURCE_MEM)
  81                         cmd |= PCI_COMMAND_MEMORY;
  82         }
  83         if (dev->resource[PCI_ROM_RESOURCE].start)
  84                 cmd |= PCI_COMMAND_MEMORY;
  85         if (cmd != old_cmd) {
  86                 printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
  87                 pci_write_config_word(dev, PCI_COMMAND, cmd);
  88         }
  89         return 0;
  90 }
  91
  92 int pcibios_enable_irq(struct pci_dev *dev)
  93 {
  94         dev->irq = EXT_INTR_VECT;
  95         return 0;
  96 }
  97
  98 int pcibios_enable_device(struct pci_dev *dev, int mask)
  99 {
 100         int err;
 101
 102         if ((err = pcibios_enable_resources(dev, mask)) < 0)
 103                 return err;
 104
 105         return pcibios_enable_irq(dev);
 106 }
 107
 108 int pcibios_assign_resources(void)
 109 {
 110         struct pci_dev *dev = NULL;
 111         int idx;
 112         struct resource *r;
 113
 114         while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
 115                 int class = dev->class >> 8;
 116
 117                 /* Don't touch classless devices and host bridges */
 118                 if (!class || class == PCI_CLASS_BRIDGE_HOST)
 119                         continue;
 120
 121                 for(idx=0; idx<6; idx++) {
 122                         r = &dev->resource[idx];
 123
 124                         if (!r->start && r->end)
 125                                 pci_assign_resource(dev, idx);
 126                 }
 127         }
 128         return 0;
 129 }
 130
 131 EXPORT_SYMBOL(pcibios_assign_resources);