arch/m68k/include/asm/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  * SPDX-License-Identifier:     GPL-2.0
  12  */
  13
  14 #ifndef _ASM_FSL_I2C_H_
  15 #define _ASM_FSL_I2C_H_
  16
  17 #include <asm/types.h>
  18
  19 typedef struct fsl_i2c {
  20
  21         u8 adr;         /* I2C slave address */
  22         u8 res0[3];
  23 #define I2C_ADR         0xFE
  24 #define I2C_ADR_SHIFT   1
  25 #define I2C_ADR_RES     ~(I2C_ADR)
  26
  27         u8 fdr;         /* I2C frequency divider register */
  28         u8 res1[3];
  29 #define IC2_FDR         0x3F
  30 #define IC2_FDR_SHIFT   0
  31 #define IC2_FDR_RES     ~(IC2_FDR)
  32
  33         u8 cr;          /* I2C control redister */
  34         u8 res2[3];
  35 #define I2C_CR_MEN      0x80
  36 #define I2C_CR_MIEN     0x40
  37 #define I2C_CR_MSTA     0x20
  38 #define I2C_CR_MTX      0x10
  39 #define I2C_CR_TXAK     0x08
  40 #define I2C_CR_RSTA     0x04
  41 #define I2C_CR_BCST     0x01
  42
  43         u8 sr;          /* I2C status register */
  44         u8 res3[3];
  45 #define I2C_SR_MCF      0x80
  46 #define I2C_SR_MAAS     0x40
  47 #define I2C_SR_MBB      0x20
  48 #define I2C_SR_MAL      0x10
  49 #define I2C_SR_BCSTM    0x08
  50 #define I2C_SR_SRW      0x04
  51 #define I2C_SR_MIF      0x02
  52 #define I2C_SR_RXAK     0x01
  53
  54         u8 dr;          /* I2C data register */
  55         u8 res4[3];
  56 #define I2C_DR          0xFF
  57 #define I2C_DR_SHIFT    0
  58 #define I2C_DR_RES      ~(I2C_DR)
  59 } fsl_i2c_t;
  60
  61 #endif  /* _ASM_I2C_H_ */