1*050a99a6SPankaj Gupta /* 2*050a99a6SPankaj Gupta * Copyright 2016-2021 NXP 3*050a99a6SPankaj Gupta * 4*050a99a6SPankaj Gupta * SPDX-License-Identifier: BSD-3-Clause 5*050a99a6SPankaj Gupta * 6*050a99a6SPankaj Gupta */ 7*050a99a6SPankaj Gupta 8*050a99a6SPankaj Gupta 9*050a99a6SPankaj Gupta #ifndef I2C_H 10*050a99a6SPankaj Gupta #define I2C_H 11*050a99a6SPankaj Gupta 12*050a99a6SPankaj Gupta #include <lib/mmio.h> 13*050a99a6SPankaj Gupta 14*050a99a6SPankaj Gupta #define I2C_TIMEOUT 1000 /* ms */ 15*050a99a6SPankaj Gupta 16*050a99a6SPankaj Gupta #define I2C_FD_CONSERV 0x7e 17*050a99a6SPankaj Gupta #define I2C_CR_DIS (1 << 7) 18*050a99a6SPankaj Gupta #define I2C_CR_EN (0 << 7) 19*050a99a6SPankaj Gupta #define I2C_CR_MA (1 << 5) 20*050a99a6SPankaj Gupta #define I2C_CR_TX (1 << 4) 21*050a99a6SPankaj Gupta #define I2C_CR_TX_NAK (1 << 3) 22*050a99a6SPankaj Gupta #define I2C_CR_RSTA (1 << 2) 23*050a99a6SPankaj Gupta #define I2C_SR_BB (1 << 5) 24*050a99a6SPankaj Gupta #define I2C_SR_IDLE (0 << 5) 25*050a99a6SPankaj Gupta #define I2C_SR_AL (1 << 4) 26*050a99a6SPankaj Gupta #define I2C_SR_IF (1 << 1) 27*050a99a6SPankaj Gupta #define I2C_SR_RX_NAK (1 << 0) 28*050a99a6SPankaj Gupta #define I2C_SR_RST (I2C_SR_AL | I2C_SR_IF) 29*050a99a6SPankaj Gupta 30*050a99a6SPankaj Gupta #define I2C_GLITCH_EN 0x8 31*050a99a6SPankaj Gupta 32*050a99a6SPankaj Gupta #define i2c_in(a) mmio_read_8((uintptr_t)(a)) 33*050a99a6SPankaj Gupta #define i2c_out(a, v) mmio_write_8((uintptr_t)(a), (v)) 34*050a99a6SPankaj Gupta 35*050a99a6SPankaj Gupta struct ls_i2c { 36*050a99a6SPankaj Gupta unsigned char ad; /* I2c Bus Address Register */ 37*050a99a6SPankaj Gupta unsigned char fd; /* I2c Bus Frequency Dividor Register */ 38*050a99a6SPankaj Gupta unsigned char cr; /* I2c Bus Control Register */ 39*050a99a6SPankaj Gupta unsigned char sr; /* I2c Bus Status Register */ 40*050a99a6SPankaj Gupta unsigned char dr; /* I2C Bus Data I/O Register */ 41*050a99a6SPankaj Gupta unsigned char ic; /* I2C Bus Interrupt Config Register */ 42*050a99a6SPankaj Gupta unsigned char dbg; /* I2C Bus Debug Register */ 43*050a99a6SPankaj Gupta }; 44*050a99a6SPankaj Gupta 45*050a99a6SPankaj Gupta void i2c_init(uintptr_t nxp_i2c_addr); 46*050a99a6SPankaj Gupta int i2c_read(unsigned char chip, int addr, int alen, 47*050a99a6SPankaj Gupta unsigned char *buf, int len); 48*050a99a6SPankaj Gupta int i2c_write(unsigned char chip, int addr, int alen, 49*050a99a6SPankaj Gupta const unsigned char *buf, int len); 50*050a99a6SPankaj Gupta int i2c_probe_chip(unsigned char chip); 51*050a99a6SPankaj Gupta 52*050a99a6SPankaj Gupta #endif /* I2C_H */ 53