- reduced memory requirements a lot (from >100kb/controller to

560bytes/controller)
- no need for the client of libpayload to implement
  usbdisk_{create,remove}, just because USB was compiled in.
- usb hub support compiles, and works for some trivial cases (no device
  detach, trivial power management)
- usb keyboard support works in qemu, though there are reports that it
  doesn't work on real hardware yet.
- usb keyboard is integrated in both libc-getchar() and curses, if
  CONFIG_USB_HID is enabled

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Jordan Crouse <jordan.crouse@amd.com>

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3662 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

payloads/libpayload/drivers/usb/usbmsc.c

@@ -69,7 +69,8 @@ static const char *msc_protocol_strings[0x51] = {
 static void
 usb_msc_destroy (usbdev_t *dev)
 {
-	usbdisk_remove (dev);
+	if (usbdisk_remove)
+		usbdisk_remove (dev);
 	free (dev->data);
 	dev->data = 0;
 }
@@ -393,5 +394,6 @@ usb_msc_init (usbdev_t *dev)
 	printf ("\n");
 
 	read_capacity (dev);
-	usbdisk_create (dev);
+	if (usbdisk_create)
+		usbdisk_create (dev);
 }