Orion

diff --git a/drivers/usb/xhci.c b/drivers/usb/xhci.c
new file mode 100644
index 0000000..715c3e6
--- /dev/null
+++ b/drivers/usb/xhci.c
@@ -0,0 +1,74 @@
+/*
+ * This file implements the driver for the Bochs Graphics Adapter video card.
+ * It is a simple card available in virtual machines.  It creates a framebuffer
+ * device node, and handles the reading/writing to it, and also mapping the
+ * framebuffer into memory.
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <sys/fb.h>
+#include "../drivers.h"
+#include "../pci.h"
+#include "../../mem/paging.h"
+#include "../../vfs/vfs.h"
+#include "../../io.h"
+
+size_t xhci_read(File *file, char *buf, size_t size, off_t offset);
+size_t xhci_write(File *file, char *buf, size_t size, off_t offset);
+int xhci_ioctl(File *file, unsigned long request, uintptr_t argp);
+
+FileOps xhciFileOps = {
+	.read = xhci_read,
+	.write = xhci_write,
+	.ioctl = xhci_ioctl,
+};
+
+Driver xhciDriver = {
+	.major = 9,
+	.ops = &xhciFileOps,
+	.next = NULL,
+};
+
+/* Initialise the USB driver */
+void
+xhci_init(uint8_t bus, uint8_t slot, uint8_t func)
+{
+	register_driver(&xhciDriver);
+
+	uint8_t intf, class, subclass;
+	intf = pci_read_byte(bus, slot, func, 9);
+	subclass = pci_read_byte(bus, slot, func, 10);
+	class = pci_read_byte(bus, slot, func, 11);
+	kprintf("    Initialising USB (%#.2x, %#.2x, %#.2x)",
+	        class, subclass, intf);
+
+	/* Map MMIO registers */
+	uint32_t bar0, bar1;
+	bar0 = pci_read_dword(bus, slot, func, 0x10);
+	bar1 = pci_read_dword(bus, slot, func, 0x14);
+	*get_page((void *) bar0) = bar0 | PTE_PRESENT | PTE_WRITE | PTE_GLOBAL;
+
+	
+}
+
+/* Read from a USB device */
+size_t
+xhci_read(File *file, char *buf, size_t size, off_t offset)
+{
+	return 0;
+}
+
+/* Write to a USB device */
+size_t
+xhci_write(File *file, char *buf, size_t size, off_t offset)
+{
+	return 0;
+}
+
+/* Control a USB device */
+int
+xhci_ioctl(File *file, unsigned long request, uintptr_t argp)
+{
+	return 0;
+}
diff --git a/drivers/usb/xhci.h b/drivers/usb/xhci.h
new file mode 100644
index 0000000..250abf6
--- /dev/null
+++ b/drivers/usb/xhci.h
@@ -0,0 +1,6 @@
+#ifndef DRIVERS_USB_XHCI_H
+#define DRIVERS_USB_XHCI_H
+
+
+
+#endif