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/*
* Copyright 2015 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __CROS_EC_INCLUDE_SPS_H
#define __CROS_EC_INCLUDE_SPS_H
#include "spi.h"
#include "util.h"
/* SPS Control Mode */
enum sps_mode {
SPS_GENERIC_MODE = 0,
SPS_SWETLAND_MODE = 1,
SPS_ROM_MODE = 2,
SPS_UNDEF_MODE = 3,
};
/*
* Tx interrupt callback function prototype. This function returns a portion
* of the received SPI data and current status of the CS line. When CS is
* deasserted, this function is called with data_size of zero and a non-zero
* cs_status. This allows the recipient to delineate the SPS frames.
*/
typedef void (*rx_handler_f)(uint32_t inst, uint8_t *data,
size_t data_size, int cs_status);
/*
* Push data to the SPS TX FIFO
* @param inst Interface number
* @param data Pointer to 8-bit data
* @param data_size Number of bytes to transmit
* @return : actual number of bytes placed into tx fifo
*/
int sps_transmit(uint32_t inst, uint8_t *data, size_t data_size);
/*
* These functions return zero on success or non-zero on failure (attempt to
* register a callback on top of existing one, or attempt to unregister
* non-exitisng callback.
*/
int sps_register_rx_handler(enum sps_mode mode, rx_handler_f rx_handler);
int sps_unregister_rx_handler(void);
#endif
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