1*91f16700Schasinglulu /* 2*91f16700Schasinglulu * Copyright 2016-2021 NXP 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu * 6*91f16700Schasinglulu */ 7*91f16700Schasinglulu 8*91f16700Schasinglulu 9*91f16700Schasinglulu #ifndef I2C_H 10*91f16700Schasinglulu #define I2C_H 11*91f16700Schasinglulu 12*91f16700Schasinglulu #include <lib/mmio.h> 13*91f16700Schasinglulu 14*91f16700Schasinglulu #define I2C_TIMEOUT 1000 /* ms */ 15*91f16700Schasinglulu 16*91f16700Schasinglulu #define I2C_FD_CONSERV 0x7e 17*91f16700Schasinglulu #define I2C_CR_DIS (1 << 7) 18*91f16700Schasinglulu #define I2C_CR_EN (0 << 7) 19*91f16700Schasinglulu #define I2C_CR_MA (1 << 5) 20*91f16700Schasinglulu #define I2C_CR_TX (1 << 4) 21*91f16700Schasinglulu #define I2C_CR_TX_NAK (1 << 3) 22*91f16700Schasinglulu #define I2C_CR_RSTA (1 << 2) 23*91f16700Schasinglulu #define I2C_SR_BB (1 << 5) 24*91f16700Schasinglulu #define I2C_SR_IDLE (0 << 5) 25*91f16700Schasinglulu #define I2C_SR_AL (1 << 4) 26*91f16700Schasinglulu #define I2C_SR_IF (1 << 1) 27*91f16700Schasinglulu #define I2C_SR_RX_NAK (1 << 0) 28*91f16700Schasinglulu #define I2C_SR_RST (I2C_SR_AL | I2C_SR_IF) 29*91f16700Schasinglulu 30*91f16700Schasinglulu #define I2C_GLITCH_EN 0x8 31*91f16700Schasinglulu 32*91f16700Schasinglulu #define i2c_in(a) mmio_read_8((uintptr_t)(a)) 33*91f16700Schasinglulu #define i2c_out(a, v) mmio_write_8((uintptr_t)(a), (v)) 34*91f16700Schasinglulu 35*91f16700Schasinglulu struct ls_i2c { 36*91f16700Schasinglulu unsigned char ad; /* I2c Bus Address Register */ 37*91f16700Schasinglulu unsigned char fd; /* I2c Bus Frequency Dividor Register */ 38*91f16700Schasinglulu unsigned char cr; /* I2c Bus Control Register */ 39*91f16700Schasinglulu unsigned char sr; /* I2c Bus Status Register */ 40*91f16700Schasinglulu unsigned char dr; /* I2C Bus Data I/O Register */ 41*91f16700Schasinglulu unsigned char ic; /* I2C Bus Interrupt Config Register */ 42*91f16700Schasinglulu unsigned char dbg; /* I2C Bus Debug Register */ 43*91f16700Schasinglulu }; 44*91f16700Schasinglulu 45*91f16700Schasinglulu void i2c_init(uintptr_t nxp_i2c_addr); 46*91f16700Schasinglulu int i2c_read(unsigned char chip, int addr, int alen, 47*91f16700Schasinglulu unsigned char *buf, int len); 48*91f16700Schasinglulu int i2c_write(unsigned char chip, int addr, int alen, 49*91f16700Schasinglulu const unsigned char *buf, int len); 50*91f16700Schasinglulu int i2c_probe_chip(unsigned char chip); 51*91f16700Schasinglulu 52*91f16700Schasinglulu #endif /* I2C_H */ 53