203 lines
7.3 KiB
C
203 lines
7.3 KiB
C
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/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file hal_mac.h
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* @brief MAC Driver macros and structures.
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* @addtogroup MAC
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* @{
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*/
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#ifndef HAL_MAC_H
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#define HAL_MAC_H
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#if (HAL_USE_MAC == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @name MAC configuration options
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* @{
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*/
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/**
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* @brief Enables an event sources for incoming packets.
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*/
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#if !defined(MAC_USE_ZERO_COPY) || defined(__DOXYGEN__)
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#define MAC_USE_ZERO_COPY FALSE
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#endif
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/**
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* @brief Enables an event sources for incoming packets.
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*/
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#if !defined(MAC_USE_EVENTS) || defined(__DOXYGEN__)
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#define MAC_USE_EVENTS TRUE
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#endif
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/** @} */
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Driver state machine possible states.
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*/
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typedef enum {
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MAC_UNINIT = 0, /**< Not initialized. */
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MAC_STOP = 1, /**< Stopped. */
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MAC_ACTIVE = 2 /**< Active. */
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} macstate_t;
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/**
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* @brief Type of a structure representing a MAC driver.
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*/
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typedef struct MACDriver MACDriver;
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#include "hal_mac_lld.h"
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/**
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* @name Macro Functions
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* @{
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*/
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/**
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* @brief Enables the zero-copy API.
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*
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* @param[in] macp pointer to the @p MACDriver object
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* @return The pointer to the @p EventSource structure.
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*
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* @api
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*/
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#if (MAC_USE_EVENTS == TRUE) || defined(__DOXYGEN__)
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#define macGetReceiveEventSource(macp) (&(macp)->rdevent)
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#endif
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/**
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* @brief Writes to a transmit descriptor's stream.
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*
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* @param[in] tdp pointer to a @p MACTransmitDescriptor structure
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* @param[in] buf pointer to the buffer containing the data to be written
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* @param[in] size number of bytes to be written
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* @return The number of bytes written into the descriptor's
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* stream, this value can be less than the amount
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* specified in the parameter @p size if the maximum frame
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* size is reached.
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*
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* @api
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*/
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#define macWriteTransmitDescriptor(tdp, buf, size) \
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mac_lld_write_transmit_descriptor(tdp, buf, size)
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/**
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* @brief Reads from a receive descriptor's stream.
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*
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* @param[in] rdp pointer to a @p MACReceiveDescriptor structure
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* @param[in] buf pointer to the buffer that will receive the read data
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* @param[in] size number of bytes to be read
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* @return The number of bytes read from the descriptor's stream,
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* this value can be less than the amount specified in the
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* parameter @p size if there are no more bytes to read.
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*
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* @api
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*/
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#define macReadReceiveDescriptor(rdp, buf, size) \
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mac_lld_read_receive_descriptor(rdp, buf, size)
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#if (MAC_USE_ZERO_COPY == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Returns a pointer to the next transmit buffer in the descriptor
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* chain.
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* @note The API guarantees that enough buffers can be requested to fill
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* a whole frame.
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*
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* @param[in] tdp pointer to a @p MACTransmitDescriptor structure
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* @param[in] size size of the requested buffer. Specify the frame size
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* on the first call then scale the value down subtracting
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* the amount of data already copied into the previous
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* buffers.
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* @param[out] sizep pointer to variable receiving the real buffer size.
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* The returned value can be less than the amount
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* requested, this means that more buffers must be
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* requested in order to fill the frame data entirely.
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* @return Pointer to the returned buffer.
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*
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* @api
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*/
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#define macGetNextTransmitBuffer(tdp, size, sizep) \
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mac_lld_get_next_transmit_buffer(tdp, size, sizep)
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/**
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* @brief Returns a pointer to the next receive buffer in the descriptor
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* chain.
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* @note The API guarantees that the descriptor chain contains a whole
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* frame.
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*
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* @param[in] rdp pointer to a @p MACReceiveDescriptor structure
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* @param[out] sizep pointer to variable receiving the buffer size, it is
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* zero when the last buffer has already been returned.
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* @return Pointer to the returned buffer.
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* @retval NULL if the buffer chain has been entirely scanned.
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*
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* @api
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*/
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#define macGetNextReceiveBuffer(rdp, sizep) \
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mac_lld_get_next_receive_buffer(rdp, sizep)
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#endif /* MAC_USE_ZERO_COPY */
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/** @} */
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void macInit(void);
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void macObjectInit(MACDriver *macp);
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void macStart(MACDriver *macp, const MACConfig *config);
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void macStop(MACDriver *macp);
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void macSetAddress(MACDriver *macp, const uint8_t *p);
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msg_t macWaitTransmitDescriptor(MACDriver *macp,
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MACTransmitDescriptor *tdp,
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sysinterval_t timeout);
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void macReleaseTransmitDescriptor(MACTransmitDescriptor *tdp);
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msg_t macWaitReceiveDescriptor(MACDriver *macp,
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MACReceiveDescriptor *rdp,
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sysinterval_t timeout);
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void macReleaseReceiveDescriptor(MACReceiveDescriptor *rdp);
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bool macPollLinkStatus(MACDriver *macp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_MAC == TRUE */
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#endif /* HAL_MAC_H */
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/** @} */
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