Fix usb debug dongle support

- move enable_usbdebug() declaration to usbdebug.h
- reinitialize debug driver in ramstage, as copying the data
  structure from romstage doesn't work right now. This way of copying
  data from romstage to ramstage is really board/cpu specific, and is
  likely to break often. So don't do it.

Change-Id: I394678ded6679c1803e29eb691b926182bdcab68
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/355
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/lib/Makefile.inc

@@ -40,5 +40,6 @@ driver-$(CONFIG_CONSOLE_NE2K) += ne2k.c
 smm-y += memcpy.c cbfs.c memset.c memcmp.c
 smm-$(CONFIG_CONSOLE_SERIAL8250) += uart8250.c
 smm-$(CONFIG_CONSOLE_SERIAL8250MEM) += uart8250mem.c
+smm-$(CONFIG_USBDEBUG) += usbdebug.c
 
 $(obj)/lib/version.ramstage.o : $(obj)/build.h

src/lib/usbdebug.c

@@ -238,7 +238,6 @@ int dbgp_bulk_read_x(struct ehci_debug_info *dbg_info, void *data, int size)
 			dbg_info->endpoint_in, data, size);
 }
 
-#ifdef __PRE_RAM__
 static void dbgp_mdelay(int ms)
 {
 	int i;
@@ -356,7 +355,7 @@ static int ehci_wait_for_port(struct ehci_regs *ehci_regs, int port)
 }
 
 
-static int usbdebug_init(unsigned ehci_bar, unsigned offset, struct ehci_debug_info *info)
+int usbdebug_init(unsigned ehci_bar, unsigned offset, struct ehci_debug_info *info)
 {
 	struct ehci_caps *ehci_caps;
 	struct ehci_regs *ehci_regs;
@@ -566,8 +565,6 @@ next_debug_port:
 	return -10;
 }
 
-// **** This part is probably x86 specific and used by romstage.c **** //
-
 int early_usbdebug_init(void)
 {
 	struct ehci_debug_info *dbg_info = (struct ehci_debug_info *)
@@ -588,4 +585,3 @@ void usbdebug_tx_byte(unsigned char data)
 		dbgp_bulk_write_x(dbg_info, (char*)&data, 1);
 	}
 }
-#endif