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1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
4  *
5  * Based on allwinner u-boot sources rsb code which is:
6  * (C) Copyright 2007-2013
7  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
8  * lixiang <lixiang@allwinnertech.com>
9  */
10 
11 #ifndef __SUNXI_RSB_H
12 #define __SUNXI_RSB_H
13 
14 #include <common.h>
15 #include <asm/io.h>
16 
17 struct sunxi_rsb_reg {
18 	u32 ctrl;	/* 0x00 */
19 	u32 ccr;	/* 0x04 */
20 	u32 inte;	/* 0x08 */
21 	u32 stat;	/* 0x0c */
22 	u32 addr;	/* 0x10 */
23 	u8 res0[8];	/* 0x14 */
24 	u32 data;	/* 0x1c */
25 	u8 res1[4];	/* 0x20 */
26 	u32 lcr;	/* 0x24 */
27 	u32 dmcr;	/* 0x28 */
28 	u32 cmd;	/* 0x2c */
29 	u32 devaddr;	/* 0x30 */
30 };
31 
32 #define RSB_CTRL_SOFT_RST		(1 << 0)
33 #define RSB_CTRL_START_TRANS		(1 << 7)
34 
35 #define RSB_STAT_TOVER_INT		(1 << 0)
36 #define RSB_STAT_TERR_INT		(1 << 1)
37 #define RSB_STAT_LBSY_INT		(1 << 2)
38 
39 #define RSB_DMCR_DEVICE_MODE_DATA	0x7c3e00
40 #define RSB_DMCR_DEVICE_MODE_START	(1 << 31)
41 
42 #define RSB_CMD_BYTE_WRITE		0x4e
43 #define RSB_CMD_BYTE_READ		0x8b
44 #define RSB_CMD_SET_RTSADDR		0xe8
45 
46 #define RSB_DEVADDR_RUNTIME_ADDR(x)	((x) << 16)
47 #define RSB_DEVADDR_DEVICE_ADDR(x)	((x) << 0)
48 
49 int rsb_init(void);
50 int rsb_set_device_address(u16 device_addr, u16 runtime_addr);
51 int rsb_write(const u16 runtime_device_addr, const u8 reg_addr, u8 data);
52 int rsb_read(const u16 runtime_device_addr, const u8 reg_addr, u8 *data);
53 
54 #endif
55