USB: Add support for OHCI controller on S3C6400

Notice: USB on S3C6400 currently works _only_ with switched off MMU. One could
try to enable the MMU, but map addresses 1-to-1, and disable data cache, then
it should work too and we could still profit from instruction cache.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>

2 files changed, 46 insertions, 0 deletions

diff --git a/cpu/arm1176/s3c64xx/Makefile b/cpu/arm1176/s3c64xx/Makefile
index fa4ee3f..4ab1811 100644
--- a/cpu/arm1176/s3c64xx/Makefile
+++ b/cpu/arm1176/s3c64xx/Makefile
@@ -30,6 +30,7 @@ LIB	= $(obj)lib$(SOC).a
 
 COBJS-y	= interrupts.o
 COBJS-$(CONFIG_S3C6400)	+= cpu_init.o speed.o
+COBJS-$(CONFIG_USB_OHCI_NEW) += usb.o
 
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS-y))
 
diff --git a/cpu/arm1176/s3c64xx/usb.c b/cpu/arm1176/s3c64xx/usb.c
new file mode 100644
index 0000000..274a4ed
--- /dev/null
+++ b/cpu/arm1176/s3c64xx/usb.c
@@ -0,0 +1,45 @@
+/*
+ * URB OHCI HCD (Host Controller Driver) initialization for USB on the S3C64XX.
+ *
+ * Copyright (C) 2008,
+ * Guennadi Liakhovetski, DENX Software Engineering <lg@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <s3c6400.h>
+
+int usb_cpu_init(void)
+{
+	OTHERS_REG |= 0x10000;
+	return 0;
+}
+
+int usb_cpu_stop(void)
+{
+	OTHERS_REG &= ~0x10000;
+	return 0;
+}
+
+void usb_cpu_init_fail(void)
+{
+	OTHERS_REG &= ~0x10000;
+}