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
  44void
  45pcibios_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
  58int 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
  90int pcibios_enable_irq(struct pci_dev *dev)
  91{
  92        dev->irq = EXT_INTR_VECT;
  93        return 0;
  94}
  95
  96int 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        if (!dev->msi_enabled)
 104                pcibios_enable_irq(dev);
 105        return 0;
 106}
 107
 108int 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
 131EXPORT_SYMBOL(pcibios_assign_resources);
 132