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 <asm/io.h> 15 16 struct sunxi_rsb_reg { 17 u32 ctrl; /* 0x00 */ 18 u32 ccr; /* 0x04 */ 19 u32 inte; /* 0x08 */ 20 u32 stat; /* 0x0c */ 21 u32 addr; /* 0x10 */ 22 u8 res0[8]; /* 0x14 */ 23 u32 data; /* 0x1c */ 24 u8 res1[4]; /* 0x20 */ 25 u32 lcr; /* 0x24 */ 26 u32 dmcr; /* 0x28 */ 27 u32 cmd; /* 0x2c */ 28 u32 devaddr; /* 0x30 */ 29 }; 30 31 #define RSB_CTRL_SOFT_RST (1 << 0) 32 #define RSB_CTRL_START_TRANS (1 << 7) 33 34 #define RSB_STAT_TOVER_INT (1 << 0) 35 #define RSB_STAT_TERR_INT (1 << 1) 36 #define RSB_STAT_LBSY_INT (1 << 2) 37 38 #define RSB_DMCR_DEVICE_MODE_DATA 0x7c3e00 39 #define RSB_DMCR_DEVICE_MODE_START (1 << 31) 40 41 #define RSB_CMD_BYTE_WRITE 0x4e 42 #define RSB_CMD_BYTE_READ 0x8b 43 #define RSB_CMD_SET_RTSADDR 0xe8 44 45 #define RSB_DEVADDR_RUNTIME_ADDR(x) ((x) << 16) 46 #define RSB_DEVADDR_DEVICE_ADDR(x) ((x) << 0) 47 48 int rsb_init(void); 49 int rsb_set_device_address(u16 device_addr, u16 runtime_addr); 50 int rsb_write(const u16 runtime_device_addr, const u8 reg_addr, u8 data); 51 int rsb_read(const u16 runtime_device_addr, const u8 reg_addr, u8 *data); 52 53 #endif 54