Nucleus

/*
 * This is the main file of the PCI driver core.  It contains the PCI Device
 * database and controls device initialisation.
 */

#include <stddef.h>
#include <stdint.h>
#include <nucleus/kernel.h>
#include <nucleus/pci.h>

/* Structure for a Device */
struct Device {
	uint16_t vendor, device;
	char *name;
	void (*init)(uint8_t, uint8_t, uint8_t);
};

void pci_init_ide(uint8_t bus, uint8_t dev, uint8_t func);
void pci_init_bga(uint8_t bus, uint8_t dev, uint8_t func);

/* Device database */
struct Device devices[] = {
	/* Intel system devices */
	{0x8086, 0x1237, "Intel i440FX Chipset", NULL},
	{0x8086, 0x7000, "Intel PIIX3 PCI-to-ISA Bridge (Triton II)", NULL},
	{0x8086, 0x7010, "Intel PIIX3 IDE Interface (Triton II)", pci_init_ide},
	{0x8086, 0x7020, "Intel PIIX3 USB (Natoma/Triton II)", NULL},
	{0x8086, 0x7113, "Intel PIIX4/4E/4M Power Management Controller", NULL},

	/* Network devices */
	{0x10EC, 0x8139, "Realtek RTL8139 10/100 NIC", NULL},
	{0x8086, 0x100E, "Intel Pro 1000/MT NIC", NULL},

	/* Virtual devices */
	{0x1B36, 0x000D, "QEMU XHCI Host Adapter", NULL},
	{0x1234, 0x1111, "QEMU/Bochs VBE Framebuffer", pci_init_bga},
};

/* Initialise a PCI device */
void
init_pci_device(int bus, int dev, int func)
{
	uint32_t d;
	uint16_t vendor, device;

	vendor = pci_read_word(bus, dev, func, 0);
	device = pci_read_word(bus, dev, func, 2);

	/* Lookup device details */
	for (d = 0; d < sizeof(devices) / sizeof(struct Device); d++) {
		if (devices[d].vendor != vendor
		 || devices[d].device != device)
			continue;
		if (devices[d].init)
			devices[d].init(bus, dev, func);
		return;
	}
}