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_BIT6	0x02	/* required for workaround A004447 */
42 #define I2C_CR_BCST	0x01
43 
44 	u8 sr;		/* I2C status register */
45 	u8 res3[3];
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
54 
55 	u8 dr;		/* I2C data register */
56 	u8 res4[3];
57 #define I2C_DR		0xFF
58 #define I2C_DR_SHIFT	0
59 #define I2C_DR_RES	~(I2C_DR)
60 
61 	u8 dfsrr;	/* I2C digital filter sampling rate register */
62 	u8 res5[3];
63 #define I2C_DFSRR	0x3F
64 #define I2C_DFSRR_SHIFT	0
65 #define I2C_DFSRR_RES	~(I2C_DR)
66 
67 	/* Fill out the reserved block */
68 	u8 res6[0xE8];
69 } fsl_i2c_t;
70 
71 #endif	/* _ASM_I2C_H_ */
72