LXR linux/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
   5void pcibios_fixup_bus(struct pci_bus *b)
   6{
   7}
   8
   9void 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
  17int 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
  39resource_size_t
  40pcibios_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
  51int 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
  83int pcibios_enable_irq(struct pci_dev *dev)
  84{
  85        dev->irq = EXT_INTR_VECT;
  86        return 0;
  87}
  88
  89int 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