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

   1#include <linux/pci.h>
   2#include <linux/kernel.h>
   3#include <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
  17resource_size_t
  18pcibios_align_resource(void *data, const struct resource *res,
  19                       resource_size_t size, resource_size_t align)
  20{
  21        resource_size_t start = res->start;
  22
  23        if ((res->flags & IORESOURCE_IO) && (start & 0x300))
  24                start = (start + 0x3ff) & ~0x3ff;
  25
  26        return start;
  27}
  28
  29int pcibios_enable_resources(struct pci_dev *dev, int mask)
  30{
  31        u16 cmd, old_cmd;
  32        int idx;
  33        struct resource *r;
  34
  35        pci_read_config_word(dev, PCI_COMMAND, &cmd);
  36        old_cmd = cmd;
  37        for(idx=0; idx<6; idx++) {
  38                /* Only set up the requested stuff */
  39                if (!(mask & (1<<idx)))
  40                        continue;
  41
  42                r = &dev->resource[idx];
  43                if (!r->start && r->end) {
  44                        printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
  45                        return -EINVAL;
  46                }
  47                if (r->flags & IORESOURCE_IO)
  48                        cmd |= PCI_COMMAND_IO;
  49                if (r->flags & IORESOURCE_MEM)
  50                        cmd |= PCI_COMMAND_MEMORY;
  51        }
  52        if (dev->resource[PCI_ROM_RESOURCE].start)
  53                cmd |= PCI_COMMAND_MEMORY;
  54        if (cmd != old_cmd) {
  55                printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
  56                pci_write_config_word(dev, PCI_COMMAND, cmd);
  57        }
  58        return 0;
  59}
  60
  61int pcibios_enable_irq(struct pci_dev *dev)
  62{
  63        dev->irq = EXT_INTR_VECT;
  64        return 0;
  65}
  66
  67int pcibios_enable_device(struct pci_dev *dev, int mask)
  68{
  69        int err;
  70
  71        if ((err = pcibios_enable_resources(dev, mask)) < 0)
  72                return err;
  73
  74        if (!dev->msi_enabled)
  75                pcibios_enable_irq(dev);
  76        return 0;
  77}
  78