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/* Copyright 2019 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __CROS_EC_I2C_BITBANG_H
#define __CROS_EC_I2C_BITBANG_H
#include "i2c.h"
extern const struct i2c_drv bitbang_drv;
extern const struct i2c_port_t i2c_bitbang_ports[];
extern const unsigned int i2c_bitbang_ports_used;
/**
* Enable I2C raw mode for the ports which need pre-task
* I2C transactions in bitbang mode.
*
* @param enable Enable/disable the I2C raw mode
*/
void enable_i2c_raw_mode(bool enable);
/**
* Board level function to initialize I2C peripherals before task starts.
*
* Note: This requires CONFIG_I2C_BITBANG to be enabled, as the task event
* based I2C transactions can only be done in bitbang mode if accessed pre-task.
*
* Example: I/O expanders can be initialized to utilize GPIOs earlier
* than the HOOK task starts.
*/
__override_proto void board_pre_task_i2c_peripheral_init(void);
/* expose static functions for testing */
#ifdef TEST_BUILD
int bitbang_start_cond(const struct i2c_port_t *i2c_port);
void bitbang_stop_cond(const struct i2c_port_t *i2c_port);
int bitbang_write_byte(const struct i2c_port_t *i2c_port, uint8_t byte);
void bitbang_set_started(int val);
#endif
#endif /* __CROS_EC_I2C_BITBANG_H */
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