1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * (C) Copyright 2019
4 * Cortina Access, <www.cortina-access.com>
5 */
6
7#ifndef __CA_I2C_H_
8#define __CA_I2C_H_
9
10#include <linux/bitops.h>
11#include <linux/delay.h>
12
13#if !defined(__ASSEMBLER__) && !defined(__ASSEMBLY__)
14struct i2c_regs {
15	u32 i2c_cfg;
16	u32 i2c_ctrl;
17	u32 i2c_txr;
18	u32 i2c_rxr;
19	u32 i2c_ack;
20	u32 i2c_ie0;
21	u32 i2c_int0;
22	u32 i2c_ie1;
23	u32 i2c_int1;
24	u32 i2c_stat;
25};
26
27union ca_biw_cfg {
28	struct biw_cfg {
29		u32 core_en		: 1;
30		u32 biw_soft_reset	: 1;
31		u32 busywait_en		: 1;
32		u32 stretch_en		: 1;
33		u32 arb_en		: 1;
34		u32 clksync_en		: 1;
35		u32 rsrvd1		: 2;
36		u32 spike_cnt		: 4;
37		u32 rsrvd2		: 4;
38		u32 prer		: 16;
39	} bf;
40	unsigned int wrd;
41};
42
43union ca_biw_ctrl {
44	struct biw_ctrl {
45		u32 biwdone	: 1;
46		u32 rsrvd1	: 2;
47		u32 ack_in	: 1;
48		u32 write	: 1;
49		u32 read	: 1;
50		u32 stop	: 1;
51		u32 start	: 1;
52		u32 rsrvd2	: 24;
53	} bf;
54	unsigned int wrd;
55};
56
57union ca_biw_ack {
58	struct biw_ack {
59		u32 al		:1;
60		u32 biw_busy	:1;
61		u32 ack_out	:1;
62		u32 rsrvd1	:29;
63	} bf;
64	unsigned int wrd;
65};
66#endif /* !__ASSEMBLER__*/
67
68struct ca_i2c {
69	struct i2c_regs *regs;
70	unsigned int speed;
71};
72
73#define I2C_CMD_WT			0
74#define I2C_CMD_RD			1
75
76#define BIW_CTRL_DONE		BIT(0)
77#define BIW_CTRL_ACK_IN		BIT(3)
78#define BIW_CTRL_WRITE		BIT(4)
79#define BIW_CTRL_READ		BIT(5)
80#define BIW_CTRL_STOP		BIT(6)
81#define BIW_CTRL_START		BIT(7)
82
83#define I2C_BYTE_TO		(CONFIG_SYS_HZ / 500)
84#define I2C_STOPDET_TO		(CONFIG_SYS_HZ / 500)
85#define I2C_BYTE_TO_BB		(10)
86
87#endif							/* __CA_I2C_H_ */
88