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/*
ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file mac.h
* @brief MAC Driver macros and structures.
* @addtogroup MAC
* @{
*/
#ifndef _MAC_H_
#define _MAC_H_
#if (HAL_USE_MAC == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name MAC configuration options
* @{
*/
/**
* @brief Enables an event sources for incoming packets.
*/
#if !defined(MAC_USE_ZERO_COPY) || defined(__DOXYGEN__)
#define MAC_USE_ZERO_COPY FALSE
#endif
/**
* @brief Enables an event sources for incoming packets.
*/
#if !defined(MAC_USE_EVENTS) || defined(__DOXYGEN__)
#define MAC_USE_EVENTS TRUE
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Driver state machine possible states.
*/
typedef enum {
MAC_UNINIT = 0, /**< Not initialized. */
MAC_STOP = 1, /**< Stopped. */
MAC_ACTIVE = 2 /**< Active. */
} macstate_t;
/**
* @brief Type of a structure representing a MAC driver.
*/
typedef struct MACDriver MACDriver;
#include "mac_lld.h"
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @name Macro Functions
* @{
*/
/**
* @brief Returns the received frames event source.
*
* @param[in] macp pointer to the @p MACDriver object
* @return The pointer to the @p EventSource structure.
*
* @api
*/
#if (MAC_USE_EVENTS == TRUE) || defined(__DOXYGEN__)
#define macGetReceiveEventSource(macp) (&(macp)->rdevent)
#endif
/**
* @brief Writes to a transmit descriptor's stream.
*
* @param[in] tdp pointer to a @p MACTransmitDescriptor structure
* @param[in] buf pointer to the buffer containing the data to be written
* @param[in] size number of bytes to be written
* @return The number of bytes written into the descriptor's
* stream, this value can be less than the amount
* specified in the parameter @p size if the maximum frame
* size is reached.
*
* @api
*/
#define macWriteTransmitDescriptor(tdp, buf, size) \
mac_lld_write_transmit_descriptor(tdp, buf, size)
/**
* @brief Reads from a receive descriptor's stream.
*
* @param[in] rdp pointer to a @p MACReceiveDescriptor structure
* @param[in] buf pointer to the buffer that will receive the read data
* @param[in] size number of bytes to be read
* @return The number of bytes read from the descriptor's stream,
* this value can be less than the amount specified in the
* parameter @p size if there are no more bytes to read.
*
* @api
*/
#define macReadReceiveDescriptor(rdp, buf, size) \
mac_lld_read_receive_descriptor(rdp, buf, size)
#if (MAC_USE_ZERO_COPY == TRUE) || defined(__DOXYGEN__)
/**
* @brief Returns a pointer to the next transmit buffer in the descriptor
* chain.
* @note The API guarantees that enough buffers can be requested to fill
* a whole frame.
*
* @param[in] tdp pointer to a @p MACTransmitDescriptor structure
* @param[in] size size of the requested buffer. Specify the frame size
* on the first call then scale the value down subtracting
* the amount of data already copied into the previous
* buffers.
* @param[out] sizep pointer to variable receiving the real buffer size.
* The returned value can be less than the amount
* requested, this means that more buffers must be
* requested in order to fill the frame data entirely.
* @return Pointer to the returned buffer.
*
* @api
*/
#define macGetNextTransmitBuffer(tdp, size, sizep) \
mac_lld_get_next_transmit_buffer(tdp, size, sizep)
/**
* @brief Returns a pointer to the next receive buffer in the descriptor
* chain.
* @note The API guarantees that the descriptor chain contains a whole
* frame.
*
* @param[in] rdp pointer to a @p MACReceiveDescriptor structure
* @param[out] sizep pointer to variable receiving the buffer size, it is
* zero when the last buffer has already been returned.
* @return Pointer to the returned buffer.
* @retval NULL if the buffer chain has been entirely scanned.
*
* @api
*/
#define macGetNextReceiveBuffer(rdp, sizep) \
mac_lld_get_next_receive_buffer(rdp, sizep)
#endif /* MAC_USE_ZERO_COPY */
/** @} */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void macInit(void);
void macObjectInit(MACDriver *macp);
void macStart(MACDriver *macp, const MACConfig *config);
void macStop(MACDriver *macp);
void macSetAddress(MACDriver *macp, const uint8_t *p);
msg_t macWaitTransmitDescriptor(MACDriver *macp,
MACTransmitDescriptor *tdp,
systime_t timeout);
void macReleaseTransmitDescriptor(MACTransmitDescriptor *tdp);
msg_t macWaitReceiveDescriptor(MACDriver *macp,
MACReceiveDescriptor *rdp,
systime_t timeout);
void macReleaseReceiveDescriptor(MACReceiveDescriptor *rdp);
bool macPollLinkStatus(MACDriver *macp);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_MAC == TRUE */
#endif /* _MAC_H_ */
/** @} */
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