firmware/export/i2c-pp.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * PP502X and PP5002 I2C driver
  11  *
  12  * Based on code from the ipodlinux project - http://ipodlinux.org/
  13  * Adapted for Rockbox in November 2005
  14  *
  15  * Original file: linux/arch/armnommu/mach-ipod/hardware.c
  16  *
  17  * Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
  18  *
  19  * This program is free software; you can redistribute it and/or
  20  * modify it under the terms of the GNU General Public License
  21  * as published by the Free Software Foundation; either version 2
  22  * of the License, or (at your option) any later version.
  23  *
  24  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  25  * KIND, either express or implied.
  26  *
  27  ****************************************************************************/
  28
  29 /*
  30  * PortalPlayer i2c driver
  31  *
  32  */
  33
  34 #ifndef _I2C_PP_H
  35 #define _I2C_PP_H
  36
  37 #define I2C_CTRL    (*(volatile unsigned char*)(I2C_BASE+0x00))
  38 #define I2C_ADDR    (*(volatile unsigned char*)(I2C_BASE+0x04))
  39 #define I2C_DATA(X) (*(volatile unsigned char*)(I2C_BASE+0xc+(4*X)))
  40 #define I2C_STATUS  (*(volatile unsigned char*)(I2C_BASE+0x1c))
  41
  42 /* I2C_CTRL bit definitions */
  43 #define I2C_SEND    0x80
  44
  45 /* I2C_STATUS bit definitions */
  46 #define I2C_BUSY    (1<<6)
  47
  48 /* TODO: Fully implement i2c driver */
  49
  50 /* To be used by drivers that need to do multiple i2c operations
  51    atomically */
  52 void i2c_lock(void);
  53 void i2c_unlock(void);
  54
  55 void i2c_init(void);
  56 int i2c_readbyte(unsigned int dev_addr, int addr);
  57 int pp_i2c_send(unsigned int addr, int data0, int data1);
  58 int i2c_readbytes(unsigned int dev_addr, int addr, int len, unsigned char *data);
  59 int i2c_sendbytes(unsigned int dev_addr, int len, const unsigned char *data);
  60
  61 #endif