Patch #5639 by Ulrich Pegelow, inits the M5636 USBOTG chip on the X5 to reduce the battery consumption.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10208 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 87 insertions, 0 deletions

diff --git a/firmware/target/coldfire/iaudio/x5/m5636-target.h b/firmware/target/coldfire/iaudio/x5/m5636-target.h
new file mode 100755
index 0000000000..51cb933c07
--- /dev/null
+++ b/firmware/target/coldfire/iaudio/x5/m5636-target.h
@@ -0,0 +1,37 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 Ulrich Pegelow
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef M5636_TARGET_H
+#define M5636_TARGET_H
+
+#define M5636_BASE 0xf0004000L /* Rockbox: 0xf0004000; OF: 0x20004000 */
+
+/* We are currently lacking a datasheet for the M5636. No mnemonics available.
+   The registers are named according to their respective hexadecimal offsets.
+*/
+   
+#define M5636_4064 (*(volatile unsigned short *)(M5636_BASE + 0x64L))
+#define M5636_4068 (*(volatile unsigned short *)(M5636_BASE + 0x68L))
+#define M5636_4078 (*(volatile unsigned short *)(M5636_BASE + 0x78L))
+
+extern void m5636_device_init(void);
+
+/* for debugging purposes only */
+extern void m5636_dump_regs(void);
+
+#endif
diff --git a/firmware/target/coldfire/iaudio/x5/m5636-x5.c b/firmware/target/coldfire/iaudio/x5/m5636-x5.c
new file mode 100755
index 0000000000..d30ff360d6
--- /dev/null
+++ b/firmware/target/coldfire/iaudio/x5/m5636-x5.c
@@ -0,0 +1,50 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 Ulrich Pegelow
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "config.h"
+#include "system.h"
+#include "logf.h"
+#include "m5636-target.h"
+
+void m5636_device_init(void)
+{
+    and_l(~0x00004000, &GPIO_INT_EN);  /* probably redundant: disable
+                                          interrupt; just in case ... */
+    and_l(~0x00000004, &GPIO1_OUT);    /* probably redundant: set GPIO34 low */
+    or_l(  0x00000004, &GPIO1_ENABLE);   /* GPIO34 enable (see above) */
+    or_l(  0x00000004, &GPIO1_FUNCTION); /* GPIO34 function (see above) */
+}
+
+/* for debugging purposes only */
+void m5636_dump_regs(void)
+{
+    unsigned short *address;
+
+    for (address = (unsigned short *)M5636_BASE;
+         address < (unsigned short *)(M5636_BASE + 0x100);
+         address++)
+    {
+         logf("m5636 A:%08x D:%04x", address, (unsigned)*address);
+    }
+
+    logf("GPIO_INT_EN    %08x", GPIO_INT_EN);
+    logf("GPIO1_OUT      %08x", GPIO1_OUT);
+    logf("GPIO1_ENABLE   %08x", GPIO1_ENABLE);
+    logf("GPIO1_FUNCTION %08x", GPIO1_FUNCTION);
+}