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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_SPP_H
#define __CROS_EC_INCLUDE_SPP_H
#include "spi.h"
#include "util.h"
/* SPP Control Mode */
enum spp_mode {
SPP_GENERIC_MODE = 0,
SPP_SWETLAND_MODE = 1,
SPP_ROM_MODE = 2,
SPP_UNDEF_MODE = 3,
};
/* Receive and transmit FIFO size and mask. */
#define SPP_FIFO_SIZE BIT(10)
#define SPP_FIFO_MASK (SPP_FIFO_SIZE - 1)
/*
* 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 SPP frames.
*/
typedef void (*rx_handler_f)(uint8_t *data, size_t data_size, int cs_disabled);
/*
* Push data to the SPP TX FIFO
* @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 spp_transmit(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-existing callback.
*
* rx_fifo_threshold value of zero means 'default'.
*/
int spp_register_rx_handler(enum spp_mode mode,
rx_handler_f rx_handler,
unsigned rx_fifo_threshold);
int spp_unregister_rx_handler(void);
void spp_tx_status(uint8_t byte);
#endif
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