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#include <stdio.h>
#include <io.h>
#include <pci.h>
void *malloc(unsigned int size);
void *memset(void *s, int c, size_t count);
#define CONFIG_CMD(dev, where) (0x80000000 | (dev->bus << 16) | (dev->devfn << 8) | (where & ~3))
static struct pci_dev *pcidevices = NULL;
struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device,
struct pci_dev *from)
{
struct pci_dev *curr = from ? from : pcidevices;
while (curr) {
if (curr->vendor == vendor && curr->device == device)
return curr;
curr = curr->next;
}
return NULL;
}
struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
{
struct pci_dev *curr = pcidevices;
while (curr) {
if (curr->devfn == devfn && curr->bus == bus)
return curr;
curr = curr->next;
}
return NULL;
}
int pci_read_config_byte(struct pci_dev *dev, u8 where, u8 * val)
{
outl(0xcf8, CONFIG_CMD(dev, where));
*val = inb(0xCFC + (where & 3));
return 0;
}
int pci_read_config_word(struct pci_dev *dev, u8 where, u16 * val)
{
outl(0xcf8, CONFIG_CMD(dev, where));
*val = inb(0xCFC + (where & 2));
return 0;
}
int pci_read_config_dword(struct pci_dev *dev, u8 where, u32 * val)
{
outl(0xcf8, CONFIG_CMD(dev, where));
*val = inb(0xCFC);
return 0;
}
int pci_write_config_byte(struct pci_dev *dev, u8 where, u8 val)
{
outl(0xcf8, CONFIG_CMD(dev, where));
outb(0xCFC + (where & 3), val);
return 0;
}
int pci_write_config_word(struct pci_dev *dev, u8 where, u16 val)
{
outl(0xcf8, CONFIG_CMD(dev, where));
outb(0xCFC + (where & 2), val);
return 0;
}
int pci_write_config_dword(struct pci_dev *dev, u8 where, u32 val)
{
outl(0xcf8, CONFIG_CMD(dev, where));
outb(0xCFC, where);
return 0;
}
#define FUNC(x) ((x) & 7)
#define SLOT(x) ((x) >> 3)
#define MAX_DEV (20 << 3)
void pci_init(void)
{
struct pci_dev *pdev, **p, current;
int dev, bus = 0, multi = 0;
pcidevices = NULL;
for (dev = 0; dev < MAX_DEV; dev++) {
u16 vendor, device;
if (!multi && FUNC(dev))
continue;
current.bus = bus; // FIXME
current.devfn = dev;
pci_read_config_word(¤t, PCI_VENDOR_ID, &vendor);
pci_read_config_word(¤t, PCI_DEVICE_ID, &device);
if (vendor == 0xffff || vendor == 0x0000 ||
device == 0xffff || device == 0x0000)
continue;
pdev = malloc(sizeof(*pdev));
memset(pdev, 0, sizeof(*pdev));
pdev->vendor = vendor;
pdev->device = device;
pdev->bus = current.bus;
pci_read_config_byte(pdev, PCI_HEADER_TYPE, &(pdev->header));
pci_read_config_word(pdev, PCI_COMMAND, &(pdev->command));
pci_read_config_byte(pdev, PCI_CLASS_PROG, &(pdev->progif));
pci_read_config_word(pdev, PCI_CLASS_DEVICE, &(pdev->class));
pdev->devfn = dev;
multi = pdev->header & 0x80;
for (p = &pcidevices; *p; p = &(*p)->next);
*p = pdev;
}
}
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