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https://github.com/Telecominfraproject/OpenCellular.git
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651f8b9acd
No functional changes. BUG=none BRANCH=none TEST=make buildall passes Change-Id: I0c4fcc900ec0326d6904aa14f298206e62be0fda Signed-off-by: Martin Roth <martinroth@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/403418 Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
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* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef __CROS_EC_INCLUDE_SPS_H
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#define __CROS_EC_INCLUDE_SPS_H
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#include "spi.h"
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#include "util.h"
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/* SPS Control Mode */
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enum sps_mode {
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SPS_GENERIC_MODE = 0,
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SPS_SWETLAND_MODE = 1,
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SPS_ROM_MODE = 2,
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SPS_UNDEF_MODE = 3,
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};
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/* Receive and transmit FIFO size and mask. */
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#define SPS_FIFO_SIZE (1 << 10)
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#define SPS_FIFO_MASK (SPS_FIFO_SIZE - 1)
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/*
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* Tx interrupt callback function prototype. This function returns a portion
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* of the received SPI data and current status of the CS line. When CS is
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* deasserted, this function is called with data_size of zero and a non-zero
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* cs_status. This allows the recipient to delineate the SPS frames.
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*/
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typedef void (*rx_handler_f)(uint8_t *data, size_t data_size, int cs_disabled);
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/*
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* Push data to the SPS TX FIFO
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* @param data Pointer to 8-bit data
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* @param data_size Number of bytes to transmit
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* @return : actual number of bytes placed into tx fifo
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*/
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int sps_transmit(uint8_t *data, size_t data_size);
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/*
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* These functions return zero on success or non-zero on failure (attempt to
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* register a callback on top of existing one, or attempt to unregister
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* non-existing callback.
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*
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* rx_fifo_threshold value of zero means 'default'.
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*/
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int sps_register_rx_handler(enum sps_mode mode,
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rx_handler_f rx_handler,
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unsigned rx_fifo_threshold);
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int sps_unregister_rx_handler(void);
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void sps_tx_status(uint8_t byte);
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unsigned sps_rx_fifo_wrptr(void);
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#endif
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