1*54fd6939SJiyong Park /* 2*54fd6939SJiyong Park * Copyright 2016-2021 NXP 3*54fd6939SJiyong Park * 4*54fd6939SJiyong Park * SPDX-License-Identifier: BSD-3-Clause 5*54fd6939SJiyong Park * 6*54fd6939SJiyong Park */ 7*54fd6939SJiyong Park 8*54fd6939SJiyong Park 9*54fd6939SJiyong Park #ifndef I2C_H 10*54fd6939SJiyong Park #define I2C_H 11*54fd6939SJiyong Park 12*54fd6939SJiyong Park #include <lib/mmio.h> 13*54fd6939SJiyong Park 14*54fd6939SJiyong Park #define I2C_TIMEOUT 1000 /* ms */ 15*54fd6939SJiyong Park 16*54fd6939SJiyong Park #define I2C_FD_CONSERV 0x7e 17*54fd6939SJiyong Park #define I2C_CR_DIS (1 << 7) 18*54fd6939SJiyong Park #define I2C_CR_EN (0 << 7) 19*54fd6939SJiyong Park #define I2C_CR_MA (1 << 5) 20*54fd6939SJiyong Park #define I2C_CR_TX (1 << 4) 21*54fd6939SJiyong Park #define I2C_CR_TX_NAK (1 << 3) 22*54fd6939SJiyong Park #define I2C_CR_RSTA (1 << 2) 23*54fd6939SJiyong Park #define I2C_SR_BB (1 << 5) 24*54fd6939SJiyong Park #define I2C_SR_IDLE (0 << 5) 25*54fd6939SJiyong Park #define I2C_SR_AL (1 << 4) 26*54fd6939SJiyong Park #define I2C_SR_IF (1 << 1) 27*54fd6939SJiyong Park #define I2C_SR_RX_NAK (1 << 0) 28*54fd6939SJiyong Park #define I2C_SR_RST (I2C_SR_AL | I2C_SR_IF) 29*54fd6939SJiyong Park 30*54fd6939SJiyong Park #define I2C_GLITCH_EN 0x8 31*54fd6939SJiyong Park 32*54fd6939SJiyong Park #define i2c_in(a) mmio_read_8((uintptr_t)(a)) 33*54fd6939SJiyong Park #define i2c_out(a, v) mmio_write_8((uintptr_t)(a), (v)) 34*54fd6939SJiyong Park 35*54fd6939SJiyong Park struct ls_i2c { 36*54fd6939SJiyong Park unsigned char ad; /* I2c Bus Address Register */ 37*54fd6939SJiyong Park unsigned char fd; /* I2c Bus Frequency Dividor Register */ 38*54fd6939SJiyong Park unsigned char cr; /* I2c Bus Control Register */ 39*54fd6939SJiyong Park unsigned char sr; /* I2c Bus Status Register */ 40*54fd6939SJiyong Park unsigned char dr; /* I2C Bus Data I/O Register */ 41*54fd6939SJiyong Park unsigned char ic; /* I2C Bus Interrupt Config Register */ 42*54fd6939SJiyong Park unsigned char dbg; /* I2C Bus Debug Register */ 43*54fd6939SJiyong Park }; 44*54fd6939SJiyong Park 45*54fd6939SJiyong Park void i2c_init(uintptr_t nxp_i2c_addr); 46*54fd6939SJiyong Park int i2c_read(unsigned char chip, int addr, int alen, 47*54fd6939SJiyong Park unsigned char *buf, int len); 48*54fd6939SJiyong Park int i2c_write(unsigned char chip, int addr, int alen, 49*54fd6939SJiyong Park const unsigned char *buf, int len); 50*54fd6939SJiyong Park int i2c_probe_chip(unsigned char chip); 51*54fd6939SJiyong Park 52*54fd6939SJiyong Park #endif /* I2C_H */ 53