53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
|
/*
|
||
|
|
* Copyright 2016-2021 NXP
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef I2C_H
|
||
|
|
#define I2C_H
|
||
|
|
|
||
|
|
#include <lib/mmio.h>
|
||
|
|
|
||
|
|
#define I2C_TIMEOUT 1000 /* ms */
|
||
|
|
|
||
|
|
#define I2C_FD_CONSERV 0x7e
|
||
|
|
#define I2C_CR_DIS (1 << 7)
|
||
|
|
#define I2C_CR_EN (0 << 7)
|
||
|
|
#define I2C_CR_MA (1 << 5)
|
||
|
|
#define I2C_CR_TX (1 << 4)
|
||
|
|
#define I2C_CR_TX_NAK (1 << 3)
|
||
|
|
#define I2C_CR_RSTA (1 << 2)
|
||
|
|
#define I2C_SR_BB (1 << 5)
|
||
|
|
#define I2C_SR_IDLE (0 << 5)
|
||
|
|
#define I2C_SR_AL (1 << 4)
|
||
|
|
#define I2C_SR_IF (1 << 1)
|
||
|
|
#define I2C_SR_RX_NAK (1 << 0)
|
||
|
|
#define I2C_SR_RST (I2C_SR_AL | I2C_SR_IF)
|
||
|
|
|
||
|
|
#define I2C_GLITCH_EN 0x8
|
||
|
|
|
||
|
|
#define i2c_in(a) mmio_read_8((uintptr_t)(a))
|
||
|
|
#define i2c_out(a, v) mmio_write_8((uintptr_t)(a), (v))
|
||
|
|
|
||
|
|
struct ls_i2c {
|
||
|
|
unsigned char ad; /* I2c Bus Address Register */
|
||
|
|
unsigned char fd; /* I2c Bus Frequency Dividor Register */
|
||
|
|
unsigned char cr; /* I2c Bus Control Register */
|
||
|
|
unsigned char sr; /* I2c Bus Status Register */
|
||
|
|
unsigned char dr; /* I2C Bus Data I/O Register */
|
||
|
|
unsigned char ic; /* I2C Bus Interrupt Config Register */
|
||
|
|
unsigned char dbg; /* I2C Bus Debug Register */
|
||
|
|
};
|
||
|
|
|
||
|
|
void i2c_init(uintptr_t nxp_i2c_addr);
|
||
|
|
int i2c_read(unsigned char chip, int addr, int alen,
|
||
|
|
unsigned char *buf, int len);
|
||
|
|
int i2c_write(unsigned char chip, int addr, int alen,
|
||
|
|
const unsigned char *buf, int len);
|
||
|
|
int i2c_probe_chip(unsigned char chip);
|
||
|
|
|
||
|
|
#endif /* I2C_H */
|