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 __devinit  pcibios_fixup_bus(struct pci_bus *b)
   6{
   7}
   8
   9char * __devinit  pcibios_setup(char *str)
  10{
  11        return NULL;
  12}
  13
  14void 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
  22int 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
  44resource_size_t
  45pcibios_align_resource(void *data, const struct resource *res,
  46                       resource_size_t size, resource_size_t align)
  47{
  48        resource_size_t start = res->start;
  49
  50        if ((res->flags & IORESOURCE_IO) && (start & 0x300))
  51                start = (start + 0x3ff) & ~0x3ff;
  52
  53        return start;
  54}
  55
  56int pcibios_enable_resources(struct pci_dev *dev, int mask)
  57{
  58        u16 cmd, old_cmd;
  59        int idx;
  60        struct resource *r;
  61
  62        pci_read_config_word(dev, PCI_COMMAND, &cmd);
  63        old_cmd = cmd;
  64        for(idx=0; idx<6; idx++) {
  65                /* Only set up the requested stuff */
  66                if (!(mask & (1<<idx)))
  67                        continue;
  68
  69                r = &dev->resource[idx];
  70                if (!r->start && r->end) {
  71                        printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
  72                        return -EINVAL;
  73                }
  74                if (r->flags & IORESOURCE_IO)
  75                        cmd |= PCI_COMMAND_IO;
  76                if (r->flags & IORESOURCE_MEM)
  77                        cmd |= PCI_COMMAND_MEMORY;
  78        }
  79        if (dev->resource[PCI_ROM_RESOURCE].start)
  80                cmd |= PCI_COMMAND_MEMORY;
  81        if (cmd != old_cmd) {
  82                printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
  83                pci_write_config_word(dev, PCI_COMMAND, cmd);
  84        }
  85        return 0;
  86}
  87
  88int pcibios_enable_irq(struct pci_dev *dev)
  89{
  90        dev->irq = EXT_INTR_VECT;
  91        return 0;
  92}
  93
  94int pcibios_enable_device(struct pci_dev *dev, int mask)
  95{
  96        int err;
  97
  98        if ((err = pcibios_enable_resources(dev, mask)) < 0)
  99                return err;
 100
 101        if (!dev->msi_enabled)
 102                pcibios_enable_irq(dev);
 103        return 0;
 104}
 105
 106int 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
 129EXPORT_SYMBOL(pcibios_assign_resources);
 130