More PortalPlayer I2C unification work

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12128 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 46 insertions, 0 deletions

diff --git a/firmware/export/i2c-pp.h b/firmware/export/i2c-pp.h
new file mode 100644
index 0000000000..1dc5bc358a
--- /dev/null
+++ b/firmware/export/i2c-pp.h
@@ -0,0 +1,46 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Linus Nielsen Feltzing
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/*
+ * PortalPlayer i2c driver
+ *
+ */
+ 
+#ifndef _I2C_PP_H
+#define _I2C_PP_H
+
+#define I2C_CTRL    (*(volatile unsigned char*)(I2C_BASE+0x00))
+#define I2C_ADDR    (*(volatile unsigned char*)(I2C_BASE+0x04))
+#define I2C_DATA(X) (*(volatile unsigned char*)(I2C_BASE+0xc+(4*X)))
+#define I2C_STATUS  (*(volatile unsigned char*)(I2C_BASE+0x1c))
+
+/* I2C_CTRL bit definitions */
+#define I2C_SEND    0x80
+
+/* I2C_STATUS bit definitions */
+#define I2C_BUSY    (1<<6)
+
+/* TODO: Fully implement i2c driver */
+
+void i2c_init(void);
+int i2c_readbyte(unsigned int dev_addr, int addr);
+int pp_i2c_send(unsigned int addr, int data0, int data1);
+int i2c_readbytes(unsigned int dev_addr, int addr, int len, unsigned char *data);
+
+#endif