This patch adds USB capabilities to libpayload. It requires some

memalign implementation (eg. the one I sent yesterday).
Features:
 - UHCI controller driver
 - UHCI root hub driver
 - USB MSC (Mass Storage Class) driver
 - skeleton of a USB HID driver
   (requires better interrupt transfer handling, which is TODO)
 - skeleton of a USB hub driver
   (needs several blank spots filled in, eg. power management.
    Again: TODO)

OHCI and EHCI are not supported, though OHCI support should be rather
easy as the stack provides reasonable abstractions (or so I hope). EHCI
will probably be more complicated.

Isochronous transfers (eg. webcams, audio stuff, ...) are not supported.
They can be, but I doubt we'll have a reason for that in the boot
environment.

The MSC driver was tested against a couple of USB flash drives, and
should be reasonably tolerant by now. But I probably underestimate
the amount of bugs present in USB flash drives, so feedback is welcome.

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@3560 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

payloads/libpayload/drivers/Makefile.inc

@@ -47,3 +47,14 @@ TARGETS-$(CONFIG_VGA_VIDEO_CONSOLE) += drivers/video/vga.o
 # Geode console drivers
 TARGETS-$(CONFIG_GEODE_VIDEO_CONSOLE) += drivers/video/geode.o
 TARGETS-$(CONFIG_GEODE_VIDEO_CONSOLE) += drivers/video/font8x16.o
+
+# USB stack
+TARGETS-$(CONFIG_USB) += drivers/usb/usbinit.o
+TARGETS-$(CONFIG_USB) += drivers/usb/usb.o
+TARGETS-$(CONFIG_USB) += drivers/usb/usb_dev.o
+TARGETS-$(CONFIG_USB_HUB) += drivers/usb/usbhub.o
+TARGETS-$(CONFIG_USB_UHCI) += drivers/usb/uhci.o
+TARGETS-$(CONFIG_USB_UHCI) += drivers/usb/uhci_rh.o
+TARGETS-$(CONFIG_USB_HID) += drivers/usb/usbhid.o
+TARGETS-$(CONFIG_USB_MSC) += drivers/usb/usbmsc.o
+