802b57ccd7
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19996 a1c6a512-1295-4272-9138-f99709370657
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* PP502X and PP5002 I2C driver
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*
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* Based on code from the ipodlinux project - http://ipodlinux.org/
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* Adapted for Rockbox in November 2005
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*
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* Original file: linux/arch/armnommu/mach-ipod/hardware.c
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*
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* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/*
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* PortalPlayer i2c driver
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*
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*/
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#ifndef _I2C_PP_H
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#define _I2C_PP_H
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#define I2C_CTRL (*(volatile unsigned char*)(I2C_BASE+0x00))
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#define I2C_ADDR (*(volatile unsigned char*)(I2C_BASE+0x04))
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#define I2C_DATA(X) (*(volatile unsigned char*)(I2C_BASE+0xc+(4*X)))
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#define I2C_STATUS (*(volatile unsigned char*)(I2C_BASE+0x1c))
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/* I2C_CTRL bit definitions */
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#define I2C_SEND 0x80
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/* I2C_STATUS bit definitions */
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#define I2C_BUSY (1<<6)
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/* TODO: Fully implement i2c driver */
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/* To be used by drivers that need to do multiple i2c operations
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atomically */
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void i2c_lock(void);
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void i2c_unlock(void);
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void i2c_init(void);
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int i2c_readbyte(unsigned int dev_addr, int addr);
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int pp_i2c_send(unsigned int addr, int data0, int data1);
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int i2c_readbytes(unsigned int dev_addr, int addr, int len, unsigned char *data);
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int i2c_sendbytes(unsigned int dev_addr, int len, const unsigned char *data);
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#endif
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