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);