include/asm-m68k/fsl_i2c.h

   1 /*
   2  * Freescale I2C Controller
   3  *
   4  * Copyright 2006 Freescale Semiconductor, Inc.
   5  *
   6  * Based on earlier versions by Gleb Natapov <gnatapov@mrv.com>,
   7  * Xianghua Xiao <x.xiao@motorola.com>, Eran Liberty (liberty@freescale.com),
   8  * and Jeff Brown.
   9  * Some bits are taken from linux driver writen by adrian@humboldt.co.uk.
  10  *
  11  * This software may be used and distributed according to the
  12  * terms of the GNU Public License, Version 2, incorporated
  13  * herein by reference.
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * Version 2 as published by the Free Software Foundation.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27  * MA 02111-1307 USA
  28  */
  29
  30 #ifndef _ASM_FSL_I2C_H_
  31 #define _ASM_FSL_I2C_H_
  32
  33 #include <asm/types.h>
  34
  35 typedef struct fsl_i2c {
  36
  37         u8 adr;         /* I2C slave address */
  38         u8 res0[3];
  39 #define I2C_ADR         0xFE
  40 #define I2C_ADR_SHIFT   1
  41 #define I2C_ADR_RES     ~(I2C_ADR)
  42
  43         u8 fdr;         /* I2C frequency divider register */
  44         u8 res1[3];
  45 #define IC2_FDR         0x3F
  46 #define IC2_FDR_SHIFT   0
  47 #define IC2_FDR_RES     ~(IC2_FDR)
  48
  49         u8 cr;          /* I2C control redister */
  50         u8 res2[3];
  51 #define I2C_CR_MEN      0x80
  52 #define I2C_CR_MIEN     0x40
  53 #define I2C_CR_MSTA     0x20
  54 #define I2C_CR_MTX      0x10
  55 #define I2C_CR_TXAK     0x08
  56 #define I2C_CR_RSTA     0x04
  57 #define I2C_CR_BCST     0x01
  58
  59         u8 sr;          /* I2C status register */
  60         u8 res3[3];
  61 #define I2C_SR_MCF      0x80
  62 #define I2C_SR_MAAS     0x40
  63 #define I2C_SR_MBB      0x20
  64 #define I2C_SR_MAL      0x10
  65 #define I2C_SR_BCSTM    0x08
  66 #define I2C_SR_SRW      0x04
  67 #define I2C_SR_MIF      0x02
  68 #define I2C_SR_RXAK     0x01
  69
  70         u8 dr;          /* I2C data register */
  71         u8 res4[3];
  72 #define I2C_DR          0xFF
  73 #define I2C_DR_SHIFT    0
  74 #define I2C_DR_RES      ~(I2C_DR)
  75
  76         u8 dfsrr;       /* I2C digital filter sampling rate register */
  77         u8 res5[3];
  78 #define I2C_DFSRR       0x3F
  79 #define I2C_DFSRR_SHIFT 0
  80 #define I2C_DFSRR_RES   ~(I2C_DR)
  81
  82         /* Fill out the reserved block */
  83         u8 res6[0xE8];
  84 } fsl_i2c_t;
  85
  86 #endif  /* _ASM_I2C_H_ */