1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Freescale I2C Controller
5 * Copyright 2006 Freescale Semiconductor, Inc.
7 * Based on earlier versions by Gleb Natapov <gnatapov@mrv.com>,
8 * Xianghua Xiao <x.xiao@motorola.com>, Eran Liberty (liberty@freescale.com),
10 * Some bits are taken from linux driver writen by adrian@humboldt.co.uk.
13 #ifndef _ASM_FSL_I2C_H_
14 #define _ASM_FSL_I2C_H_
16 #include <asm/types.h>
17 #include <linux/compiler.h>
19 typedef struct fsl_i2c_base {
21 u8 adr; /* I2C slave address */
24 #define I2C_ADR_SHIFT 1
25 #define I2C_ADR_RES ~(I2C_ADR)
27 u8 fdr; /* I2C frequency divider register */
30 #define IC2_FDR_SHIFT 0
31 #define IC2_FDR_RES ~(IC2_FDR)
33 u8 cr; /* I2C control redister */
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_BIT6 0x02 /* required for workaround A004447 */
42 #define I2C_CR_BCST 0x01
44 u8 sr; /* I2C status register */
46 #define I2C_SR_MCF 0x80
47 #define I2C_SR_MAAS 0x40
48 #define I2C_SR_MBB 0x20
49 #define I2C_SR_MAL 0x10
50 #define I2C_SR_BCSTM 0x08
51 #define I2C_SR_SRW 0x04
52 #define I2C_SR_MIF 0x02
53 #define I2C_SR_RXAK 0x01
55 u8 dr; /* I2C data register */
58 #define I2C_DR_SHIFT 0
59 #define I2C_DR_RES ~(I2C_DR)
61 u8 dfsrr; /* I2C digital filter sampling rate register */
63 #define I2C_DFSRR 0x3F
64 #define I2C_DFSRR_SHIFT 0
65 #define I2C_DFSRR_RES ~(I2C_DR)
67 /* Fill out the reserved block */
73 struct fsl_i2c_base __iomem *base; /* register base */
81 #endif /* _ASM_I2C_H_ */